JP4944735B2 - Pipe fitting - Google Patents

Description

  In the present invention, a branch pipe portion communicating with a branch port penetratingly formed in a fluid pipe is formed in one of a plurality of split joint bodies that are detachably fixedly connected along a circumferential direction of a fluid pipe such as a water pipe. Related to the pipe fittings.

As a technique for discharging foreign matter such as chips generated when forming a branch port in an undisturbed state on the pipe wall of the fluid pipe corresponding to the branch pipe portion of the divided joint body, conventionally, the following foreign substance discharge has been performed. A structure has been proposed.
(1) Out of the split joint bodies of the two-part structure constituting the pipe joint, the outer peripheral surface of the fluid pipe and the split joint are connected to another split joint body located on the back side of the split joint body provided with the branch pipe portion. An L-shaped discharge cylinder part capable of discharging foreign matters such as chips together with a fluid flowing out from the branch port through a space formed between the inner surface of the body and the projecting direction of the branch pipe part It protrudes in the opposite direction (see Patent Documents 1 and 2).

(2) Among the split joint bodies having a two-part structure constituting the pipe joint, the bottom face side part of the branch pipe part projecting from one side or the bottom face side part of the split joint body connected to the base end part of the branch pipe part, A discharge cylinder capable of discharging foreign matter such as chips together with the fluid flowing out from the branch port through a space formed between the flow path in the branch pipe section or the outer peripheral surface of the fluid pipe and the inner surface of the split joint body The part protrudes downward or obliquely downward at a position directly below the branch pipe part (see Patent Document 3).

JP 2005-036862 A JP 2005-121079 A Japanese Patent No. 3429019

In the former former pipe joint, the other split joint body located on the back side of the split joint body provided with the branch pipe section has an L-shape in the direction opposite to the protruding direction of the branch pipe section. In the former pipe joint, there is a discharge tube part protruding from the bottom side part of the branch pipe part or the bottom side part of the split joint body connected to the base end part of the branch pipe part, at a position directly below the branch pipe part. Or, since the discharge cylinder part projects obliquely downward, the excavation volume of the work pit required for attaching the pipe joint provided with the branch pipe part to the fluid pipe increases, and the construction period However, there was a problem that the construction cost would rise as the length of time increased.
The present invention has been made in view of the above-described actual situation, and its main problem is that the construction period is shortened and the construction work is made by rational modification of the discharge structure using the space existing around the branch pipe portion. The object is to provide a pipe joint capable of reducing the cost.

A first characteristic configuration according to the present invention is a branch pipe portion that communicates with one of a plurality of split joints that are detachably fixedly connected along a circumferential direction of a fluid pipe, and a branch port that is formed through the fluid pipe. And through the space formed between the outer peripheral surface of the fluid pipe and the inner surface of the split joint body at a side position biased outward in the pipe axis direction of the fluid pipe with respect to the branch pipe portion. A discharge port part capable of discharging foreign matters such as chips together with the fluid flowing out from the branch port is provided , and the proximal end opening periphery of the branch pipe part on the inner surface of the split joint body including the branch pipe part is provided. A first reinforcing annular wall portion that approaches or contacts the outer peripheral surface of the outer peripheral edge of the branch opening of the fluid pipe is formed to protrude along the outer peripheral edge. Is between the opposing surfaces of the inner surface of the split joint body and the outer peripheral surface of the fluid pipe. A communication port is formed which communicates the central side space communicating with the proximal end side opening side of the branch pipe section partitioned by the reinforcing annular wall portion and the end side space communicating with the proximal end side opening side of the discharge port portion. It is in the point.

According to the above characteristic configuration, a space for mounting a work on-off valve, a drilling machine, or the like is secured on the branch pipe portion projecting from one of the split joint bodies of the split structure constituting the pipe joint. Therefore, out of the split joint body provided with the branch pipe part, the discharge pipe part of the fluid pipe with respect to the branch pipe part can be discharged to the outside together with the fluid flowing out from the branch port. By disposing at the side position biased outward in the direction, the discharge path constituting member connected to the discharge port portion can be disposed using the space existing around the branch pipe portion.
In addition, a first reinforcing annular wall portion formed on the proximal end opening peripheral edge of the branch pipe portion on the inner surface of the split joint body is formed on the outer peripheral surface of the outer peripheral edge of the branch opening of the fluid pipe when the fluid pipe is mounted. The outer peripheral edge of the branch opening of the fluid pipe can be reinforced in close proximity or contact.
In addition, foreign matter such as chips accumulates in the lower part of the central space communicating with the proximal side opening side of the branch pipe section partitioned by the first reinforcing annular wall portion. Since a communication port that connects the central side space and the end side space that communicates with the base end side opening side of the discharge port portion is formed, foreign matter that accumulates in the lower part of the central side space can end at a high flow rate. It can be reliably and smoothly discharged to the side space.

Therefore, the by rational modification of the outlet portion using the space existing around the branch pipe portion, remove the drilling required to discharge the foreign matters such as chips outside with fluid flowing from the branch port Therefore, the construction period can be shortened and the construction cost can be reduced.

A second characteristic configuration according to the present invention is a branch pipe portion communicating with a branch port penetratingly formed in one of a plurality of divided joint bodies fixedly connected in a detachable manner along the circumferential direction of the fluid pipe. Is projected, and the intermediate portion in the tube axis direction of the split joint body corresponding to the base forming portion of the branch pipe portion is bulged outward in the radial direction, and the intermediate portion in the tube axis direction including the bulged intermediate portion The radial dimension of the space formed between the inner peripheral surface of the region and the outer peripheral surface of the fluid pipe is larger on the branch axis side of the branch pipe portion than on both ends of the intermediate region in the tube axis direction. In the intermediate region of the split joint body provided with the branch pipe portion, and on the side side portion that is biased outward in the pipe axis direction of the fluid pipe with respect to the branch pipe portion A discharge port portion that can discharge foreign matter such as chips together with fluid flowing out from the branch port through the space Is formed, wherein the proximal end side opening rim of the branch pipe portion in the inner face of the split joint body provided with a branch pipe portion, the first reinforcing ring in contact close to or against the outer peripheral surface of the outer peripheral edge of the branch port of the fluid tube A wall portion is formed so as to protrude along the outer peripheral edge, and the first reinforcing annular wall portion corresponds to the foreign matter accumulation portion between the opposing surfaces of the inner surface of the split joint body and the outer peripheral surface of the fluid pipe. A communication port that communicates a central space that communicates with the proximal opening side of the branch pipe section defined by the reinforcing annular wall and an end space that communicates with the proximal opening side of the discharge port; It is in a formed point.

  According to the above characteristic configuration, a space for mounting a work on-off valve, a drilling machine, or the like is secured on the branch pipe portion projecting from one of the split joint bodies of the split structure constituting the pipe joint. Therefore, the discharge port part capable of discharging foreign matter such as chips together with the fluid flowing out from the branch port of the fluid pipe is provided in the middle of the tube axis direction including the bulging intermediate part of the split joint body provided with the branch pipe part. The discharge path component member connected to the discharge port portion is disposed in the region and on a side portion that is biased outwardly in the tube axis direction of the fluid pipe with respect to the branch pipe portion. It can arrange | position using the space which exists around a part.

In addition, a first reinforcing annular wall portion formed on the proximal end opening peripheral edge of the branch pipe portion on the inner surface of the split joint body is formed on the outer peripheral surface of the outer peripheral edge of the branch opening of the fluid pipe when the fluid pipe is mounted. The outer peripheral edge of the branch opening of the fluid pipe can be reinforced in close proximity or contact.
Furthermore, foreign matter such as chips accumulates in the lower portion of the central space communicating with the proximal end side opening side of the branch pipe section partitioned by the first reinforcing annular wall portion. Since a communication port that connects the central side space and the end side space that communicates with the base end side opening side of the discharge port portion is formed, foreign matter that accumulates in the lower part of the central side space can end at a high flow rate. It can be reliably and smoothly discharged to the side space.
Moreover, the discharge port portion has a radial dimension of a space formed between the inner peripheral surface of the tube axis direction intermediate region including the bulging intermediate portion and the outer peripheral surface of the fluid pipe. Since it is located on the end side in the tube axis direction that is configured smaller than the axis side, the pipe from the discharge port portion uses the flow velocity that accelerates foreign matters such as chips flowing into the space forming region. It can be efficiently discharged outside.

Therefore, the by rational modification of the outlet portion using the space existing around the branch pipe portion, remove the drilling required to discharge the foreign matters such as chips outside with fluid flowing from the branch port In addition to shortening the construction period and lowering construction costs, foreign matter such as chips can be obtained by utilizing the internal space structure of the intermediate area in the tube axis direction including the bulging middle part of the split joint body. Can be efficiently discharged from the outlet to the outside of the pipe.

A third characteristic configuration according to the present invention is a branch port that is formed through the fluid pipe at an intermediate portion in the pipe axis direction of one of the plurality of split joints that are detachably fixedly connected along the circumferential direction of the fluid pipe. A branch pipe portion that communicates with the pipe, and an intermediate portion in the tube axis direction of each of the split joint bodies including a region corresponding to a base formation portion of the branch pipe portion is provided between the outer peripheral surface of the fluid pipe and the peripheral portion. An annular space communicating in a direction and bulging outward in the radial direction, and an inner peripheral surface of a tube axis direction intermediate region including the bulging intermediate portion, and an outer peripheral surface of the fluid pipe The radial dimension of the space formed between the branch tube portion is configured such that the branch tube core side of the branch tube portion is larger than both ends in the tube core direction in the intermediate region, and the branch tube portion is provided. The pipe axis direction of the fluid pipe in the intermediate region of the split joint body and the branch pipe portion The Gawawaki sites biased outward side, the outlet section capable of discharging the foreign substances to the outside, such as chips is formed with a fluid flowing out from the branch port through the space, dividing joint with the branch pipe portion A first reinforcing annular wall portion that is close to or abuts on the outer peripheral surface of the outer peripheral edge of the branch opening of the fluid pipe is formed to protrude along the outer peripheral edge at the proximal end opening peripheral edge of the branch pipe portion on the inner surface of the body. In addition, in the portion corresponding to the foreign matter accumulation of the first reinforcing annular wall portion, a branch pipe defined by the first reinforcing annular wall portion is provided between the opposed surfaces of the inner surface of the split joint body and the outer peripheral surface of the fluid pipe. A communication port is formed which communicates the central side space communicating with the base end side opening side of the portion and the end side space communicating with the base end side opening side of the discharge port portion .

  According to the above characteristic configuration, a space for mounting a work on-off valve, a drilling machine, or the like is secured on the branch pipe portion projecting from one of the split joint bodies of the split structure constituting the pipe joint. Therefore, the discharge port part capable of discharging foreign matter such as chips together with the fluid flowing out from the branch port of the fluid pipe is provided in the middle of the tube axis direction including the bulging intermediate part of the split joint body provided with the branch pipe part. The discharge path component member connected to the discharge port portion is disposed in the region and on a side portion that is biased outwardly in the tube axis direction of the fluid pipe with respect to the branch pipe portion. It can arrange | position using the space which exists around a part.

  And the annular axial direction intermediate part of each said split joint body including the area | region equivalent to the base formation location of the said branch pipe part forms the annular space connected in the circumferential direction between the outer peripheral surfaces of the said fluid pipe | tube. Since the bulge is formed on the radially outer side in the state, the pressure in the circumferential direction at the branch port formation portion of the fluid pipe is equalized, and the durability of the fluid pipe can be improved.

In addition, a first reinforcing annular wall portion formed on the proximal end opening peripheral edge of the branch pipe portion on the inner surface of the split joint body is formed on the outer peripheral surface of the outer peripheral edge of the branch opening of the fluid pipe when the fluid pipe is mounted. The outer peripheral edge of the branch opening of the fluid pipe can be reinforced in close proximity or contact.
In addition, foreign matter such as chips accumulates in the lower part of the central space communicating with the proximal side opening side of the branch pipe section partitioned by the first reinforcing annular wall portion. Since a communication port that connects the central side space and the end side space that communicates with the base end side opening side of the discharge port portion is formed, foreign matter that accumulates in the lower part of the central side space can end at a high flow rate. It can be reliably and smoothly discharged to the side space.
Further, the discharge port portion is a space formed between the inner peripheral surface of the intermediate region in the tube axis direction including the bulging intermediate portion of the split joint body provided with the branch pipe portion and the outer peripheral surface of the fluid pipe. Since the radial dimension is located on the end side in the tube axis direction that is configured to be smaller than the branch axis side of the branch tube portion, the flow velocity that accelerates foreign matters such as chips flowing into the space forming region Can be efficiently discharged out of the pipe from the discharge port.

Therefore, the by rational modification of the outlet portion using the space existing around the branch pipe portion, remove the drilling required to discharge the foreign matters such as chips outside with fluid flowing from the branch port Therefore, not only can the construction period be shortened and the construction cost can be reduced, but also the durability of the fluid pipe can be improved, and for this purpose, the pipe shaft including the bulging intermediate part of the split joint body Using the internal space structure of the intermediate region in the core direction, foreign matter such as chips can be efficiently discharged out of the pipe from the discharge port.

A fourth characteristic configuration according to the present invention is a second feature in which an inner surface of a split joint body other than the split joint body provided with the branch pipe portion among a plurality of the split joint bodies approaches or contacts the outer peripheral surface of the fluid pipe. The reinforcing annular wall portion is formed so as to protrude .

  A fifth characteristic configuration according to the present invention is that the discharge flow path axis of the discharge port is configured to be parallel or substantially parallel to the branch axis of the branch pipe.

  According to the above characteristic configuration, the discharge path constituting member connected to the discharge port portion of the split joint body is parallel or substantially parallel to the branch axis of the branch pipe portion using the space existing around the branch pipe portion. It can be arranged.

  According to a sixth characteristic configuration of the present invention, the discharge channel axis of the discharge port is configured as an inclined axis that is separated from the branch axis toward the downstream side of the branch axis of the branch pipe. It is in.

  According to the above characteristic configuration, not only can the discharge path constituting member connected to the discharge port portion be disposed using the space existing around the branch pipe portion, but also the discharge flow of the discharge port portion. The discharge port portion can be disposed closer to the branch pipe portion as much as the road axis is inclined, and the space existing around the branch pipe portion can be advantageously utilized.

  A seventh characteristic configuration according to the present invention is that the discharge port portion is constituted by a discharge tube portion integrally formed with a part of a rib protruding from the outer surface of the split joint body.

  According to the above-described characteristic configuration, the discharge port portion forming portion of the split joint body is rationally reinforced by integrally forming a discharge cylinder portion for discharging foreign matters such as chips outside the pipe with a part of the rib. be able to.

  An eighth characteristic configuration according to the present invention is that the discharge port portion is disposed on a horizontal plane passing through a tube axis of the fluid pipe and a branch axis of the branch tube.

  According to the above characteristic configuration, the vertical space existing around the branch pipe part can be advantageously used with reference to the horizontal plane passing through the pipe axis of the fluid pipe and the branch axis of the branch pipe part.

  A ninth characteristic configuration according to the present invention is that the discharge port portion is disposed at a portion biased downward from a horizontal plane passing through the pipe axis of the fluid pipe and the branch axis of the branch pipe part. is there.

  According to the above characteristic configuration, the foreign matter accumulation position in the space between the outer peripheral surface of the fluid pipe and the inner surface of the split joint body and the disposition position of the discharge port portion are close in the vertical direction, and foreign matters such as chips Can be efficiently discharged from the outlet to the outside of the pipe.

[First Embodiment]
1-10 cross | intersects with respect to the pipe core X of the fluid pipe 1 to the outer peripheral surface 1a of the existing fluid pipes 1, such as a water pipe comprised from a cast iron pipe, a steel pipe, etc. (in this embodiment, it is orthogonal) FIG. 11 to FIG. 18 show a cast iron pipe joint A integrally formed with a branch pipe portion 2 projecting outward along a horizontal or substantially horizontal direction (branch axis Y direction). The pipe joint A is externally fixed in a state of being sealed (sealed in a liquid-tight state or an air-tight state) with the sealing material 3 between the outer peripheral surface 1a of the fluid pipe 1 and a work on-off valve is connected to the branch pipe portion 2 of the pipe joint A. With the hole saw 36 as an example of the rotary cutting tool of the drilling machine C attached via B, the flow of the fluid in the fluid pipe 1 is maintained through the opening of the opening / closing valve B and the branch pipe portion 2 which are opened. A branch drilling method in which a branch port 4 is formed through a pipe wall portion sealed with a sealing material 3 is shown.

  As shown in FIGS. 1 to 7, the pipe joint A is divided into a plurality of parts (in three parts in the present embodiment) in the pipe circumferential direction that can be sheathed from the outside in the pipe radial direction with respect to the fluid pipe 1. It is composed of cylindrical split joint bodies 5 to 7, and adjacent split joint bodies 5 to 7 that are sheathed on the fluid pipe 1 are examples of fastening means at both ends in the pipe circumferential direction of each split joint body 5 to 7. Connecting portions 5A to 7A for detachably fixing and connecting with a plurality of bolts 8 and nuts 9 are integrally formed to project, and both ends of the split joint bodies 5 to 7 in the tube axis X direction For example, each of the split joint bodies 5 to 7 is fixed to the outer peripheral surface 1a of the fluid pipe 1 from the outside in the radial direction of the fluid pipe 1 by attaching the plurality of bolts 10 by screwing. 7B is integrally formed, and furthermore, the annular joint formed on the inner peripheral surfaces 5a to 7a of the divided joint bodies 5 to 7 The Lumpur retaining groove 5B～7b, synthetic rubber for sealing between the outer peripheral surface 1a of the fluid pipe 1 (e.g., styrene-butadiene rubber) seal member 3 is mounted.

  As shown in FIG. 6, first reinforcing ribs 5 </ b> D to 7 </ b> D are provided along the pipe circumferential direction at both ends of the outer peripheral surfaces of the divided joint bodies 5 to 7 in the pipe axis X direction. Second reinforcing ribs 5E to 7E along the tube axis X direction project from the center positions in the pipe circumferential direction of the ribs 5D to 7D and the outer peripheral surface of the branch pipe portion 2, and the connecting portions 5A to 5A are provided. Third reinforcing ribs 5F to 7F are provided so as to project along the pipe circumferential direction intersecting with the second reinforcing ribs 5E to 7E in a cross shape over the center position in the tube axis X direction of 7A.

  The intermediate portions 5C to 7C in the tube axis X direction of the divided joint bodies 5 to 7 corresponding to the base forming positions of the branch tube portion 2, in other words, the intersections with the branch axis Y of the branch tube portion 2 The intermediate portions 5C to 7C distributed in the tube axis direction with a size slightly larger than the outer diameter of the branch tube portion 2 around the center position in the tube axis X direction of the split joint bodies 5 to 7 are the branch tubes. The projecting allowance to the outside in the pipe radial direction at the portion intersecting with the branch axis Y of the portion 2 is maximized, and the projecting allowance to the outside in the pipe radial direction is gradually reduced as approaching both ends of the pipe axis X direction. In the state of being bulged and formed in an arc shape radially outward, the split joint bodies 5 to 7 include the bulging intermediate portions 5C to 7C, and the seal holding grooves 5b to 7b. Intermediate area W corresponding to the inner dimension of both pipe circumferential grooves which is the inner dimension in the tube axis X direction Between the inner circumferential surface 5a~7a and the outer peripheral surface 1a of the fluid pipe 1, the annular space S continuously in the circumferential direction is formed.

  Of the annular space S, the radial dimension of the central annular space corresponding to the inner peripheral surfaces of the bulging intermediate portions 5C to 7C is the tube axis direction X both ends on the space forming region (bulging intermediate region). The branch tube portion 2 is configured to be larger on the side of the branch axis Y than in other words, in other words, the annular space at the center position in the tube axis direction X that intersects the branch axis Y of the branch tube portion 2. The radial dimension is maximized, and the radial dimension of the annular space gradually decreases as it approaches both ends of the tube axis X direction, and continues to the bulging intermediate region of the annular space S. The radial dimension of the side annular space in the both side regions is configured to be constant or substantially constant up to the vicinity of the end, and then constricted into a taper shape in which the radial dimension decreases rapidly as it approaches both ends. ing.

  In the intermediate region W of the split joint body 5 provided with the branch pipe part 2 and on the side arm part deviated outward from the outer peripheral surface of the branch pipe part 2 in the tube axis X direction, in other words, the branch pipe In the vicinity of the tapered end portion that is spaced outward from the outer peripheral surface of the portion 2 in the direction of the tube axis X, foreign matter such as chips is discharged to the outside together with the fluid flowing out from the branch port 4 through the annular space S. A possible outlet 11 is formed.

  The discharge port 11 has a discharge channel axis Z at the branch pipe at a position slightly deviated below a horizontal plane passing through the pipe axis X of the fluid pipe 1 and the branch axis Y of the branch pipe part 2. The discharge cylinder part is formed to protrude in a state of being parallel or substantially parallel to the branch axis Y of the part 2, and the discharge cylinder part 11 is formed integrally with a part of the third reinforcing rib 5F.

Wherein the proximal-side opening peripheral edge of the branch pipe portion 2 on the inner surface of the branch pipe portion 2 divided joint body 5 having a proximate or abutting the outer peripheral surface 1a of the outer peripheral edge of the fluid pipe 1 branch port forming region A reinforcing annular wall portion 12 (first reinforcing annular wall portion, the same applies hereinafter) is formed so as to protrude along the outer peripheral edge, and the circumferential center perpendicular to the tube axis direction center line of the reinforcing annular wall portion 12 On both side portions opposed to each other by a line, in other words, on both upper and lower side portions including the portion corresponding to the accumulation of foreign matter, the reinforcing annular is provided between the opposed surfaces of the inner surface of the divided joint body 5 and the outer peripheral surface 1a of the fluid pipe 1. The central side space S1 communicating with the base end side opening side of the branch pipe portion 2 partitioned by the wall portion 12 and the end side space S2 communicating with the base end side opening side of the discharge port portion 11 are communicated. A communication port 13 is formed.

  The communication port 13 is revealed by notching the upper and lower side portions of the reinforcing annular wall portion 12 to a crescent-shaped inclined surface 12a along the connecting surface of the connecting portion 5A. The fluid on the side of the central space S1 that communicates with the base-side opening side of the gas passes through the communication port 13 and then forms a divergent shape formed between the outer peripheral surface of the reinforcing annular wall 12 and the sealing material 3. This arc-shaped flow path 14 is configured to flow into the end portion side space S2 communicating with the base end side opening side of the discharge port portion 11.

  A minute gap H1 is also generated between the front surface of the reinforcing annular wall portion 12 and the outer peripheral surface 1a of the fluid pipe 1, and the fluid in the central side space S1 passes through this gap H1 to the end portion. Although there is a possibility of flowing into the side space S2, the gap H1 is smaller and smaller than the gap H2 of the communication port 13, so that the center side space S1 → the communication port 13 → the arc-shaped channel 14 → the end side space. The route that flows to S2 becomes mainstream.

Then, the divided joint body 5 reinforcing annular wall 12 formed on the base end side opening peripheral edge of the branch pipe portion 2 on the inner surface of, the fluid pipe 1 during attachment to a fluid pipe 1 of the branch port forming region outer peripheral edge and the outer peripheral surface 1a close or abut the can reinforce the outer periphery of the branch opening 4 formed branch port forming region of the fluid pipe 1. Moreover, foreign matter such as chips accumulates in the lower part of the central side space S1 facing the proximal end side opening side of the branch pipe portion 2 partitioned by the reinforcing annular wall portion 12. Since the communication port 13 is formed to communicate the central side space S1 and the end side space S2 facing the base end side opening side of the discharge port portion 11, foreign matter accumulated in the lower part of the central side space S1 is quickly collected. It is possible to reliably and smoothly discharge to the end side space S2 side at the flow velocity.

Furthermore, the even inner surface of the other of the two split joint members 6 and 7 adjacent the split joint body 5 having a branch pipe portion 2, reinforcing proximity or in contact with an annular outside circumferential surface 1a of the fluid pipe 1 An annular wall portion 15 (second reinforcing annular wall portion, hereinafter the same) is integrally formed, and is opposed to a circumferential center line perpendicular to the tube axis direction center line of the reinforcing annular wall portion 15. Like the reinforcing annular wall 12, the reinforcing annular wall 15 is defined between the opposing surfaces of the inner surfaces of the divided joint bodies 6 and 7 and the outer peripheral surface 1 a of the fluid pipe 1. A communication port 16 for communicating the center side space S3 and the both end side spaces S4 is formed.

  The communication port 16 is formed by notching the upper and lower side portions of the reinforcing annular wall portion 15 in a crescent-shaped inclined surface 15a along the connecting surface of the connecting portions 6A and 7A, and the branch pipe The fluid on the central space S1 side in the split joint body 5 provided with the portion 2 flows into the central space S3 through the communication ports 13 and 16, and at the same time, the outer peripheral surface of the reinforcing annular wall 15 and the sealing material 3. Are formed so as to flow into the end portion side space S4 through the arc-shaped flow channel 14 having a divergent shape formed therebetween.

  The gap H2 of the communication port 16 is configured to be the same as the gap H2 of the communication port 13, and as shown in FIG. 10, among the inner surfaces of the connecting portions 5A, 6A, 7A, the end side A clearance H3 of the communication port 19 formed between the inner surface of the part located on the space S2, S4 side and the inner surface of the sealing material 3 attached to the part and the outer surface 1a of the fluid pipe 1 is formed. The clearance H1 is larger than the gap H1 formed between the front surface of the reinforcing annular wall 12 and the outer peripheral surface 1a of the fluid pipe 1, and smaller than the clearance H2 of the communication ports 13 and 16. Is configured to a value.

  Further, the annular space S is constituted by the central side spaces S1, S2, S3, S4, the communication ports 13, 16 and the arc-shaped flow path 14 communicating with them.

  As shown in FIGS. 15 to 18, on the inner peripheral surface of the discharge cylinder part 11, a nipple 21 connected to the discharge work on-off valve 20 and a downstream flow path in the discharge cylinder part 11 are sealed. A first screw portion 11a for screwing and detachably attaching a closing plug (an example of this closing member) 22 and an upstream flow passage in the discharge cylinder portion 11 are discharged to be sealed. A second screw portion for screwing and mounting a temporary closing plug (an example of a temporary closing member) 23 inserted through the flow path 20a in the ball valve body 20B of the work on-off valve 20 and the flow path 21a in the nipple 21. 11b is formed, and the main closing plug 22 is formed with a concave portion 22a into which an operation portion 23a protruding from the back surface of the temporary closing plug 23 can enter from the discharge flow channel axial direction.

  A plug mounting jig D for mounting a connection fitting 25 of a foreign matter discharge hose 24 for discharging foreign matters such as chips together with a fluid and a temporary closing plug 23 to the other end side connection portion of the discharge work on-off valve 20. A screw portion 20b is formed to selectively attach and detach the connection case 26 to and from the connection case 26.

  As shown in FIGS. 16 and 17, the plug mounting jig D performs a screwing operation on the connection case 26 that can store the temporary closing plug 23 and the temporary closing plug 23 stored in the connection case 26. And a discharge hose 29 having an opening / closing valve 28 connected to the connection case 26. The box wrench 27 is connected to the connection case 26. It is mounted so that it can be rotated and pushed / pulled from the outside.

Next, a branch drilling method using the pipe joint A configured as described above will be described.
(A) As shown in FIGS. 11 and 12, the pipe joint A in which the branch pipe portion 2 is integrally formed at a position corresponding to the branch pipe connection of the existing fluid pipe 1 is connected to the outer peripheral surface 1 a of the fluid pipe 1. In addition to external fitting with the gap sealed with the sealing material 3, one connection flange portion 31 </ b> A of the valve case 31 of the work on-off valve B is attached to the connection flange portion 2 </ b> A of the branch pipe portion 2 of the pipe joint A. In addition, a plurality of bolts and nuts, which are examples of fastening means, are fixedly connected in a sealed state, and further, the other connecting flange portion 31B of the valve case 31 of the working on-off valve B is connected to the inside of the working on-off valve B. The connecting flange portion 32A of the housing 32 of the drilling machine C that cuts and forms the branch port 4 in the pipe wall of the fluid pipe 1 through the flow passage and the flow passage in the branch pipe portion 2 is a plurality of joint flange fastening means. Securely connect in a sealed state with bolts and nuts.

  Further, as shown in FIG. 15, the male screw portion of the discharge work on-off valve 20 is sealed in the nipple 21 screwed and connected to the first screw portion 11a of the discharge tube portion 11 of the pipe joint A in a sealed state. In addition, the connection fitting 25 of the foreign matter discharge hose 24 is screwed and connected to the screw portion 20b on the other end side of the discharge work on-off valve 20 in a sealed state.

  (B) As shown in FIGS. 12 and 13, the opening / closing operation mechanism 33 of the work opening / closing valve B is operated to open the opening / closing valve body 34 at the flow path closing position to the flow path opening position, As shown in FIG. 15, a discharge work on / off valve is provided so that both foreign matter such as chips generated by the punching work by the punching machine C and the fluid flowing out from the fluid pipe 1 can be discharged to a predetermined external location. The operation lever 20A of 20 is opened and operated. Thereafter, the driving part of the drilling machine C is driven to apply a driving rotational force and a feeding force to the driving rotary shaft 35, and the hole saw 36 connected to the connecting flange portion of the driving rotary shaft 35 is opened and closed for work. By feeding from the horizontal or substantially horizontal direction through the flow path in the valve B and the flow path in the branch pipe portion 2, the branch port 4 is cut and formed in the pipe wall of the fluid pipe 1 from the pipe radial direction.

  At the time of this drilling operation, as shown in FIGS. 14 and 15, the fluid flowing out from the branch port 4 formed by cutting in the tube wall of the fluid tube 1 and the chips swept away by this fluid communicate with the branch port 4. Opening / closing for discharge work which flows into the discharge cylinder part 11 via the center side space S1 → the communication port 13 → the arc-shaped flow path 14 → the end side space S2 and is connected to the discharge cylinder part 11 via the nipple 21. Since the valve 20 and the foreign matter discharge hose 24 screwed to the discharge operation on-off valve 20 can be discharged together at a predetermined external location, chips accumulate in the valve seat 31 corresponding to the formation of the valve seat. This can be suppressed.

  And the space for attaching the operation on-off valve B, the drilling machine C, etc. is ensured in the branch pipe part 2 side protrudingly provided by one division joint body 5 of the division structure which constitutes the pipe joint A. Therefore, the discharge shaft portion 11 capable of discharging foreign matter such as chips together with the fluid flowing out from the branch port 4 to the outside includes the bulging intermediate portion 5C of the split joint body 5 provided with the branch tube portion 2. By disposing the discharge tube portion 11 in the intermediate region W in the core X direction and at a side part that is biased outward in the tube axis X direction of the fluid tube 1 with respect to the outer peripheral surface of the branch tube portion 2. The foreign matter discharge hose 24 connected to the pipe can be disposed by utilizing the space existing around the branch pipe portion 2.

  Moreover, the pipe core X direction intermediate portion 5C of each of the split joint bodies 5 to 7 including the region corresponding to the base forming portion of the branch pipe portion 2 is circumferentially disposed between the outer peripheral surface 1a of the fluid pipe 1. Is formed so as to bulge outward in the radial direction in a state of forming the annular space S communicating with each other, the pressure in the circumferential direction at the branch port 4 formation portion of the fluid pipe 1 is equalized, and the durability of the fluid pipe 1 Can be improved.

  Further, the discharge cylinder portion 11 includes an inner peripheral surface 5a of the tube core X-direction intermediate region W including the bulging intermediate portion 5C of the split joint body 5 provided with the branch pipe portion 2, and an outer peripheral surface 1a of the fluid pipe 1. Is located on the end side in the tube axis X direction, which is configured to be smaller than the branch axis Y core side of the branch tube portion 2. It is possible to efficiently discharge foreign matter such as chips flowing into the outside of the pipe from the discharge port portion by using a flow velocity that accelerates.

  (C) When the drilling step for the fluid pipe 1 is completed, the driving part of the drilling machine A is driven in reverse or the manual handle is operated to move the hole saw 36 back to the initial standby position. By operating the opening / closing operation mechanism 33 of the work opening / closing valve B, the opening / closing valve body 34 in the channel opening position is closed and operated in the channel closing position.

  (D) As shown in FIG. 16, when the discharge process of the chips generated during the drilling operation is completed, the operation lever 20A of the discharge work on / off valve 20 is closed, and the screw of the discharge work on / off valve 20 is closed. The connection fitting 25 of the foreign matter discharge hose 24 is removed from the portion 20b, and then the connection case 26 of the plug mounting jig D in which the temporary closing plug 23 is accommodated is screwed.

  Next, as shown in FIG. 17, the operation lever 20A of the discharge work on / off valve 20 is opened, the box wrench 27 of the plug mounting jig D is pushed in, and the temporary closing plug 23 is connected to the discharge cylinder portion. 11, the box wrench 27 is rotated to the tightening side and the temporarily closing plug 23 is screwed onto the second screw portion 11 b of the discharge cylinder portion 11.

  When the process of attaching the temporary closing plug 23 is completed, as shown in FIG. 18, the discharge work on / off valve 20 is removed from the first threaded portion 11a of the discharge cylinder portion 11, and then the final closing plug 22 is screwed. Fit together.

  (E) After the drilling operation by the punching machine C is completed, after the connection flange portion 22 of the drilling device C is removed from the other connection flange portion 31B of the work on-off valve B, the other connection flange portion of the work on-off valve B is removed. A fluid pipe of a branch piping system is connected to 31B.

[Second Embodiment]
In the first embodiment described above, the discharge port portion 11 is discharged at a position slightly deviated below the horizontal plane passing through the tube axis X of the fluid pipe 1 and the branch axis Y of the branch tube portion 2. The discharge tube portion is formed so as to protrude in a state where the flow path axis Z is parallel or substantially parallel to the branch axis Y of the branch tube portion 2, as shown in FIGS. 19 and 20. 11 on the horizontal plane passing through the pipe axis X of the fluid pipe 1 and the branch axis Y of the branch pipe part 2, the discharge channel axis Z is downstream of the branch axis Y of the branch pipe part 2. You may comprise from the discharge | emission cylinder part comprised by the inclination axis line spaced apart from this branch axis Y so that.

In the case of this embodiment, the discharge path of the foreign matter discharge hose 24 etc. connected to the discharge cylinder part 11 with reference to the horizontal plane passing through the pipe axis X of the fluid pipe 1 and the branch axis Y of the branch pipe part 2 The constituent members can be arranged by advantageously utilizing the vertical space existing around the branch pipe portion 2, and the discharge tube axis 11 is inclined by an amount corresponding to the inclination of the discharge flow channel axis Z. The part 11 can be disposed close to the branch pipe part 2 side, and the space existing around the branch pipe part 2 can be advantageously utilized.
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

[Third Embodiment]
In the first embodiment described above, the pipe joint A is composed of split joint bodies 5 to 7 that are divided into three in the pipe circumferential direction in a form that can be externally attached to the fluid pipe 1 from the outside in the pipe radial direction. However, as shown in FIGS. 21 to 27, it may be composed of split joint bodies 5 and 6 that are split into two in the pipe circumferential direction.

  A plurality of bolts 8 and nuts, which are examples of fastening means, are provided at adjacent ends of the pipe joint A in the circumferential direction of the pipe joints A and 6. 9, connecting portions 5 </ b> A and 6 </ b> A for detachably fixing and connecting are integrally formed to project, and the split joint bodies 5 and 6 are respectively provided at both ends of the split joint bodies 5 and 6 in the tube axis X direction. , 6 are integrally formed with mounting portions 5B and 6B for screwing and mounting a plurality of bolts 10 as an example of a fixing means for tightening and fixing 6 to the outer peripheral surface 1a of the fluid pipe 1 from the outside in the pipe diameter direction. A synthetic rubber sealing material 3 for sealing the space between the outer peripheral surface 1a of the fluid pipe 1 and the annular seal holding grooves 5b, 6b formed on the inner peripheral surfaces 5a, 6a of the divided joint bodies 5, 6 is provided. It is installed.

  Of the two split joint bodies 5 and 6, the inner peripheral surface 5a of the intermediate region W corresponding to the inner dimension of both pipe circumferential groove portions which are the inner dimensions in the tube axis X direction of the seal holding grooves 5b and 6b. , 6a and the outer peripheral surface 1a of the fluid pipe 1 is formed with an annular space S continuous in the circumferential direction, and in an intermediate region W of the split joint body 5 provided with the branch pipe portion 2, In addition, the fluid flowing out from the branch port 4 of the fluid pipe 1 through the annular space S is located on the side portion of the fluid pipe 1 that is biased outward in the tube axis X direction with respect to the outer peripheral surface of the branch pipe portion 2. At the same time, a discharge port 11 capable of discharging foreign matters such as chips is formed.

  The discharge port portion 11 has a discharge channel axis Z that is slightly branched downward from a horizontal plane passing through the tube axis X of the fluid pipe 1 and the branch axis Y of the branch tube portion 2. It is comprised from the discharge cylinder part which protruded and formed in the state used as the inclination axis line which is spaced apart from this branch axis Y toward the downstream with respect to the branch axis Y of the pipe part 2. As shown in FIG.

Of the split joint bodies 5, 6 , in the inner surface of the split joint body 5 having the branch pipe portion 2, a portion of the split pipe body 2 that is spaced slightly outward from the proximal end opening peripheral edge of the branch pipe portion 2 tube reinforcement annular wall portions 17 and 18 you close or abutting the outer peripheral surface 1a of the outer peripheral edge of the branch port forming region of 1 are formed, pipe axis direction of the reinforcement annular wall portions 17 and 18 of this At least one of both side portions opposed to each other at the circumferential center line orthogonal to the center line, in other words, at least the lower side portion corresponding to the accumulation of foreign matter among the upper and lower side portions, Between the opposed surface of the inner surface and the outer peripheral surface 1a of the fluid pipe 1, the central side space S1 communicating with the proximal end side opening side of the branch pipe part 2 defined by the reinforcing annular wall parts 17 and 18 and the discharge port A communication port 19A for communicating with the end portion side space S2 communicating with the base end side opening side of the portion 11; 19B is notched.
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

[Other Embodiments]
(1) In each of the above-described embodiments, in the intermediate region W of the split joint body 5 including the branch pipe part 2 and on one side of the pipe axis X direction with respect to the outer peripheral surface of the branch pipe part 2 A discharge port portion 11 capable of discharging foreign matters such as chips together with the fluid flowing out from the branch port 4 of the fluid pipe 1 through the annular space S is formed in the biased side portion. May be formed respectively on the side portions that are biased to both sides in the tube axis X direction with respect to the outer peripheral surface of the branch pipe portion 2.

(2) In the first embodiment described above, the proximally opening peripheral edge of the branch pipe portion 2 on the inner surface of the branch pipe portion 2 divided joint body 5 having a periphery of said fluid pipe 1 branch port forming region The reinforcing annular wall portion 12 was formed in proximity to or in contact with the outer peripheral surface 1a of the edge .
Moreover, in this 1st Embodiment, you may abbreviate | omit and implement the cyclic | annular wall part 15 for reinforcement provided in the inner surface of the other both split joint bodies 6 and 7.

  (3) In the first embodiment described above, in the reinforcing annular wall portion 12 formed on the inner surface of the split joint body 5 provided with the branch pipe portion 2, the portion closest to the discharge port portion 11 or the vicinity thereof. A central side space S1 communicating with the base end side opening side of the branch pipe portion 2 partitioned by the reinforcing annular wall portion 12, and an end side space S2 communicating with the base end side opening side of the discharge port portion 11; The communication port 13 for communicating with each other may be formed by notching.

The side view of the whole pipe joint which shows 1st Embodiment of this invention Front view of the entire fitting III-III sectional view in FIG. IV-IV sectional view in FIG. Cross-sectional view taken along line V-V in FIG. Front view and back view of three split joints Exploded side view of the entire fitting 3 is an enlarged cross-sectional view of the main part of FIG. FIG. 5 is an enlarged cross-sectional view of the main part of FIG. 4 is an enlarged cross-sectional view of the main part of FIG. Partial cross-sectional side view of the whole before drilling work connected with an on-off valve for work Partial cross-sectional side view of the whole before drilling work with a drilling machine connected Partial partial cross-sectional side view during drilling Rear view of split joint body showing chip discharge state Enlarged sectional view of the discharge port structure showing the chip discharge state Enlarged cross-sectional view of the discharge port structure when the plug mounting jig is installed Enlarged cross-sectional view of the discharge port structure during the temporary closing plug mounting operation Enlarged sectional view of the structure of the discharge port when the plug for final closure is installed The front view of the whole pipe joint which shows 2nd Embodiment of this invention 19 is an enlarged cross-sectional view of the main part taken along line XX-XX in FIG. The side view of the whole pipe joint which shows 3rd Embodiment of this invention Front view of the entire fitting XXIII-XXIII sectional view in FIG. XXIV-XXIV sectional view in Fig. 21 XXV-XXV cross-sectional view in FIG. XXVI-XXVI sectional view in FIG. 25 is an enlarged cross-sectional view of the main part of FIG.

Explanation of symbols

S space (annular space)
S1 space (center side space)
S2 space (end side space)
W Intermediate region X Tube axis Y Branch axis Z Discharge channel axis 1 Fluid pipe 1a Outer peripheral surface 4 Branch port 5 Split joint body 5C Swelling intermediate portion 5F Rib (third reinforcing rib)
5a Inner peripheral surface 6 Division joint body 7 Division joint body 11 Discharge port part (discharge cylinder part)
12 1st reinforcing annular wall 13 Communication port
15 second reinforcing annular wall portion 17 reinforcement annular wall portion 18 reinforcement annular wall portion 19A communicating opening 19B communicating port

Claims (9)

One of a plurality of split joints fixedly connected along the circumferential direction of the fluid pipe, a branch pipe portion communicating with a branch port formed through the fluid pipe, and a fluid with respect to the branch pipe portion Chips together with fluid flowing out from the branch port through a space formed between the outer peripheral surface of the fluid pipe and the inner surface of the split joint body at a side position biased outward in the pipe axis direction of the pipe provided with a foreign matter and the outside to allow the discharge of the outlet portion,
A first reinforcing annular wall portion that is close to or abuts on the outer peripheral surface of the outer peripheral edge of the branch opening of the fluid pipe is provided on the periphery of the proximal end opening of the branch pipe portion on the inner surface of the split joint body including the branch pipe portion. The first reinforcing annular wall is formed so as to protrude along the outer peripheral edge, and the first reinforcing annular wall is disposed between the opposing surfaces of the inner surface of the divided joint body and the outer peripheral surface of the fluid pipe. A communication port is formed to communicate the central side space communicating with the proximal end side opening side of the branch pipe section partitioned by the annular wall portion and the end side space communicating with the proximal end side opening side of the discharge port portion. pipe joints are. A branch pipe portion communicating with a branch port penetratingly formed in the fluid pipe protrudes from one of the plurality of split joint bodies that are fixedly connected along the circumferential direction of the fluid pipe. An intermediate portion in the tube axis direction of the split joint body corresponding to the base forming portion is formed to bulge radially outward, and the inner peripheral surface of the intermediate region in the tube axis direction including the bulged intermediate portion and the fluid pipe The radial dimension of the space formed between the outer peripheral surface is configured such that the branch pipe core side of the branch pipe portion is larger than both ends of the pipe core in the intermediate region, and the branch pipe In the intermediate region of the split joint body provided with a portion, and on a side side portion that is biased outward in the tube axis direction of the fluid pipe with respect to the branch pipe portion, the fluid flows out from the branch port through the space. A discharge port part that can discharge foreign matter such as chips together with the fluid is formed ,
A first reinforcing annular wall portion that is close to or abuts on the outer peripheral surface of the outer peripheral edge of the branch opening of the fluid pipe is provided on the periphery of the proximal end opening of the branch pipe portion on the inner surface of the split joint body including the branch pipe portion. The first reinforcing annular wall is formed so as to protrude along the outer peripheral edge, and the first reinforcing annular wall is disposed between the opposing surfaces of the inner surface of the divided joint body and the outer peripheral surface of the fluid pipe. A communication port is formed to communicate the central side space communicating with the proximal end side opening side of the branch pipe section partitioned by the annular wall portion and the end side space communicating with the proximal end side opening side of the discharge port portion. Pipe fittings. A branch pipe portion communicating with a branch port penetrating through the fluid pipe is provided at one intermediate portion in the pipe axis direction of the plurality of split joints that are detachably fixedly connected along the circumferential direction of the fluid pipe. A state in which an intermediate portion in the tube axis direction of each of the divided joint bodies including a region corresponding to the base forming portion of the branch pipe portion forms an annular space communicating with the outer peripheral surface of the fluid pipe in the circumferential direction. And a radial direction of a space formed between the inner peripheral surface of the tube axis direction intermediate region including the bulging intermediate portion and the outer peripheral surface of the fluid pipe. The dimension is configured to be larger on the branch axis side of the branch pipe part than on both ends in the pipe axis direction in the intermediate area, and in the intermediate area of the split joint body including the branch pipe part, In addition, the side arm portion that is biased outward in the tube axis direction of the fluid pipe with respect to the branch pipe portion Outlet portion capable of discharging the foreign substances to the outside, such as chips is formed with a fluid flowing out from the branch port through said space,
A first reinforcing annular wall portion that is close to or abuts on the outer peripheral surface of the outer peripheral edge of the branch opening of the fluid pipe is provided on the periphery of the proximal end opening of the branch pipe portion on the inner surface of the split joint body including the branch pipe portion. The first reinforcing annular wall is formed so as to protrude along the outer peripheral edge, and the first reinforcing annular wall is disposed between the opposing surfaces of the inner surface of the divided joint body and the outer peripheral surface of the fluid pipe. A communication port is formed to communicate the central side space communicating with the proximal end side opening side of the branch pipe section partitioned by the annular wall portion and the end side space communicating with the proximal end side opening side of the discharge port portion. Pipe fittings. A second reinforcing annular wall portion that protrudes from or is in contact with the outer peripheral surface of the fluid pipe is formed on the inner surface of the split joint body other than the split joint body provided with the branch pipe portion among the plurality of split joint bodies. pipe joint according to any one of claims 1 to 3 are.   The pipe joint according to any one of claims 1 to 4, wherein a discharge channel axis of the discharge port is configured to be parallel or substantially parallel to a branch axis of the branch pipe.   The discharge channel axis of the discharge port is configured as an inclined axis that is separated from the branch axis toward the downstream side with respect to the branch axis of the branch pipe. The described pipe joint.   The pipe joint according to any one of claims 1 to 6, wherein the discharge port portion is constituted by a discharge cylinder portion formed integrally with a part of a rib projecting from an outer surface of the split joint body.   The pipe joint according to any one of claims 1 to 7, wherein the discharge port part is disposed on a horizontal plane passing through a pipe axis of the fluid pipe and a branch axis of the branch pipe part.   The said discharge port part is arrange | positioned in the site | part biased below rather than the horizontal surface which passes along the pipe axis of the said fluid pipe, and the branch axis of a branch pipe part. Pipe fittings.

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