JP6855345B2 - saddle - Google Patents

Description

The present invention relates to a saddle for connecting an external device such as a drilling machine or a gas bag insertion machine to a gas pipe or a water pipe.

When repairing or replacing pipes such as gas pipes and water pipes buried in the ground, it is necessary to shut off the gas and water in the pipes in the construction section before cutting the pipes.

In Patent Document 1, when repairing a gas pipe, gas bags are inserted into the upstream side and the downstream side of the construction section, and the gas pipe is shut off by inflating the gas bag to stop the gas, and then the construction is performed. A method of repairing a gas pipe that replaces a pipe in a section is disclosed.

Such a gas pipe repair method includes a saddle portion having a rib, a padding metal fitting having a hook hooked on the rib, and a clamping means for clamping the saddle portion and the padding metal fitting with the pipe sandwiched between them. The saddle is used. Then, a drilling tool is connected to the body of the saddle to drill the gas pipe, and then a no-blow bag is connected to the body to prevent gas leakage and the gas bag is inserted through the hole drilled in the gas pipe. Then, the gas flow in the gas pipe is blocked by inflating the gas bag.

Japanese Unexamined Patent Publication No. 9-49596

However, the saddle described in Patent Document 1 is installed by two workers in cooperation with each other. That is, one worker attaches the saddle portion and the padding metal fitting to the outer circumference of the pipe so as to sandwich the pipe, and the other worker clamps the saddle portion and the padding metal fitting by the clamping means. Therefore, mounting the saddle requires a plurality of workers, and there is a problem that a wide work space must be secured by digging up a wide area.

Therefore, a technical problem to be solved arises in order to provide a saddle that can be easily attached even by one worker, and an object of the present invention is to solve this problem.

The present invention has been proposed to achieve the above object, and the invention according to claim 1 is a saddle for connecting an external device to a pipe, and the external device can be attached and attached to the pipe. A pair of saddle portions having a two-divided structure, a temporary fixing means for temporarily fixing the pair of saddle portions while sandwiching the pipe, and the pair of saddle portions with the pair of saddle portions temporarily fixed. The temporary fixing means is provided with one end side pivotally attached to one of the pair of saddle portions and the other end side oscillating toward the other of the pair of saddle portions. Provided is a saddle provided with a shaft portion and a receiving portion provided on the other side of the pair of saddle portions and capable of engaging and disengaging the other end side of the shaft portion.

According to this configuration, the pair of saddles are temporarily fixed with the pipe sandwiched between them, so that the worker can support the pair of saddles with one hand and maintain the temporarily fixed state of the pair of saddles. Since the pair of saddle portions can be fixed with one hand using the fixing means, one worker can easily attach the saddle to the pipe. Further, since the shaft portion swings toward the receiving portion, the pair of saddle portions can be temporarily fixed, so that one worker can easily attach the saddle to the pipe.

In the invention according to claim 2 , in addition to the configuration of the invention according to claim 1 , the shaft portion includes a head portion formed to be wider than the shaft portion, and the receiving portion accommodates the shaft portion. Provided is a saddle provided with a notch portion to be formed and a claw portion for receiving the head portion.

According to this configuration, the shaft portion is housed in the notch portion, so that the pair of saddle portions can be aligned in the horizontal direction, and the head portion can be brought into contact with the claw portion, so that during work. It is possible to prevent the pair of saddle portions from falling off.

According to the present invention, by temporarily fixing the pair of saddle portions with the pipe sandwiched between them, the worker can support the pair of saddle portions with one hand and maintain the temporarily fixed state of the pair of saddle portions. Since the pair of saddles can be fixed with one hand using the fixing means, the saddle can be easily attached to the pipe by one worker without requiring a large work space.

A plan view, a front view, and a side view showing a saddle according to an embodiment of the present invention. FIG. 1 (b) is a cross-sectional view taken along the line II. An exploded perspective view of the saddle of FIG. Top view, bottom view, front view and side view showing the upper saddle portion. A plan view, a front view, and a vertical sectional view showing the lower saddle portion. The schematic diagram which shows the saddle mounting procedure.

The present invention is a saddle for connecting an external device to a pipe in order to achieve an object of providing a saddle that can be easily attached even by a single worker, and the external device can be attached and attached to the pipe. A pair of saddle portions having a divided structure, a temporary fixing means for temporarily fixing the pair of saddle portions with the pipe sandwiched between them, and a fixing means for fixing the pair of saddle portions with the pair of saddle portions temporarily fixed. It was realized by having.

Hereinafter, the saddle 1 according to an embodiment of the present invention will be described with reference to the drawings. In the following examples, when the number, numerical value, quantity, range, etc. of the components are referred to, the specific number is used unless it is clearly stated or in principle it is clearly limited to a specific number. It is not limited, and may be more than or less than a specific number.

In addition, when referring to the shape and positional relationship of components, etc., unless otherwise specified or when it is considered that this is not the case in principle, those that are substantially similar to or similar to the shape, etc. shall be used. Including.

In addition, the drawings may be exaggerated by enlarging the characteristic parts in order to make the features easy to understand, and the dimensional ratios and the like of the components are not always the same as the actual ones. Further, in the cross-sectional view, hatching of some components may be omitted in order to make the cross-sectional structure of the components easy to understand. In this embodiment, the terms "upper" and "lower" correspond to upper and lower in the vertical direction.

1A and 1B are views showing a saddle 1 attached to a gas pipe P, where FIG. 1A is a plan view, FIG. 1B is a front view, and FIG. 1C is a side view. FIG. 2 is a cross-sectional view taken along the line II of FIG. 1 (b). FIG. 3 is an exploded perspective view of the saddle 1 in which the bolt B is omitted. 4 (a) to 4 (d) are a plan view, a bottom view, a front view, and a side view showing the upper saddle portion 10. 5 (a) to 5 (c) are a plan view, a front view, and a sectional view taken along line II-II showing the lower saddle portion 20.

The saddle 1 is attached to a polyethylene conduit for gas (hereinafter, simply referred to as "gas pipe") P. The gas pipe P supplies the gas sent from the gas production base to the gas consumer, and is mainly buried in the ground. The pressure of the gas flowing in the gas pipe P is, for example, low pressure, medium pressure A, medium pressure B, or the like. The pipe to which the saddle 1 is attached is not limited to the gas pipe and may be a water pipe or the like.

An external device corresponding to the construction content of the gas pipe P is connected to the saddle 1. The external device connected to the saddle 1 is, for example, a drilling machine for drilling the gas pipe P with a hole saw, a gas bag insertion machine for inserting a gas bag for shutting off the gas pipe P, and a gas bag inserting machine for discharging the gas in the gas P to the outside. Dispersion pipe, etc.

The saddle 1 has a substantially cylindrical shape by combining the upper saddle portion 10 and the lower saddle portion 20 formed in a substantially semi-cylindrical shape so as to face each other. The upper saddle portion 10 and the movable saddle portion 20 are made of cast iron, but are not limited thereto.

Two side flanges 11 are provided at both ends of the upper saddle portion 10 in the width direction W. The side flange 11 projects from the upper saddle portion 10 toward the width direction W of the saddle 1. The side flange 11 is formed with a bolt hole 12 through which the bolt B is inserted.

A central flange 13 is provided at the center of the upper saddle portion 10. The central flange 13 is erected from the upper saddle portion 10 in the vertical direction V orthogonal to the width direction W. The central flange 13 is formed to have substantially the same diameter along the vertical direction V.

Bolt holes 14 for connecting an external device (not shown) are provided at the four corners of the central flange 13. When an external device is connected to the central flange 13 by screwing a bolt (not shown) into the bolt hole 14, the central flange 13 is formed with substantially the same diameter and high rigidity along the vertical direction V. It is possible to suppress twisting and bending of the central flange 13 due to tightening.

The central flange 13 is formed with a mounting hole 15 that penetrates the upper saddle portion 10 in the vertical direction V. The mounting hole 15 communicates with the inside and the outside of the upper saddle portion 10.

In the vicinity of the mounting hole 15, a first seal groove 16 is provided concentrically with the mounting hole 15. A first O-ring 30 is fitted in the first seal groove 16. The first O-ring 30 suppresses gas leakage from between the central flange 13 and the external device.

The upper saddle portion 10 includes an inner peripheral surface 17 curved along the outer circumference of the gas pipe P. The inner peripheral surface 17 is provided with a second seal groove 18 carved concentrically with the mounting hole 15. A second O-ring 40 is fitted in the second seal groove 18. The second O-ring 40 suppresses gas leakage from between the upper saddle portion 10 and the gas pipe P.

Two flanges 21 are provided at both ends of the lower saddle portion 20 in the width direction W. The flange 21 projects from the lower saddle portion 20 toward the width direction W of the saddle 1. The flange 21 is formed with a bolt hole 22 through which the bolt B is inserted. The upper saddle portion 10 and the lower saddle portion 20 are integrally fixed to the bolt B by screwing the nut N in the state of being inserted into the bolt holes 12 and 22.

The lower saddle portion 20 includes a contact surface 23 curved along the outer circumference of the gas pipe P.

The saddle 1 includes a temporary fixing means 50 for temporarily fixing the upper saddle portion 10 and the lower saddle portion 20. The temporary fixing means 50 includes a shaft portion 51 and a receiving portion 52.

The shaft portion 51 is provided between the flanges 21 and 21 adjacent to each other in the axial direction A. A nut 51a as a head portion is screwed to the tip of the shaft portion 51.

Further, the base end side of the shaft portion 51 is axially attached to the lower saddle portion 20. Specifically, a through hole 51b is formed on the base end side of the shaft portion 51, and the shaft portion 51 is axially attached to the shaft 24 by inserting the shaft 24 into the through hole 51b. Both ends of the shaft 24 are pivotally supported by support portions 26 that are detachably attached to the peripheral surface of the lower saddle portion 20 with bolts 25. As a result, the shaft portion 51 can be manufactured separately from the lower saddle portion 20, and the shaft portion 51 can be newly installed in the existing lower saddle portion 20.

The receiving portion 52 is formed in a U shape when viewed from a plane, and is two claw portions 52b provided apart from each other with a notch portion 52a in the axial direction A. The width of the notch 52a is set to be larger than the outer diameter of the shaft portion 51 and smaller than the outer diameter of the nut 51a. The closer the width of the notch 52a is to the outer diameter of the shaft 51, the easier it is to align the centers of the bolt holes 12 and 22, which is preferable.

The claw portion 52b projects from the upper saddle portion 10 in the width direction W. The claw portion 52b is arranged so that the shaft portion 51 is located below the nut 51a by a gap L, which will be described later, in a state where the shaft portion 51 is housed in the notch portion 52a.

Next, the procedure for attaching the saddle 1 to the gas pipe P will be described with reference to FIG.

First, the circumference of the gas pipe P buried in the ground is dug up to expose the gas pipe P in the construction section.

Next, as shown in FIG. 6A, the upper saddle portion 10 is placed on the gas pipe P so that the inner peripheral surface 17 is in contact with the gas pipe P.

Next, the upper saddle portion 10 and the lower saddle portion 20 are temporarily fixed. Specifically, as shown in FIG. 6B, the lower saddle portion 20 is brought closer to the upper saddle portion 10 so that the gas pipe P is located between the upper saddle portion 10 and the lower saddle portion 20. Then, the tip of the shaft portion 51 is swung so that the shaft portion 51 is accommodated in the notch portion 52a, so that the upper saddle portion 10 and the lower saddle portion 20 are temporarily fixed in the axial direction A and the width direction W. Further, by bringing the nut 51a into contact with the claw portion 52b, the upper saddle portion 10 and the lower saddle portion 20 are temporarily fixed in the vertical direction V.

Next, as shown in FIG. 6C, the lower saddle portion 20 is tilted so as to be parallel to the upper saddle portion 10. When the nut 51a comes into contact with the claw portion 52b, a gap L is secured between the upper saddle portion 10 and the lower saddle portion 20, so that the upper saddle portion 10 and the lower saddle portion 20 are temporarily fixed. The lower saddle portion 20 can be brought closer to the upper saddle portion 10 while being maintained.

Then, by hitting the contact surface 23 of the lower saddle portion 20 against the gas pipe P, the gas pipe P is sandwiched between the saddle 1. Since the shaft portion 51 is housed in the notch portion 52a, the centers of the bolt holes 12 and 22 are positioned at substantially the same positions when viewed from the plane, so that one worker can use one hand to lower the saddle portion. While supporting 20, the bolt B can be easily inserted into the bolt holes 12 and 22. Then, by screwing the nut N into the bolt B, the upper saddle portion 10 and the lower saddle portion 20 are integrally fixed as shown in FIG. 6D.

When the saddle 1 is attached to the gas pipe P, a drilling machine or a gas bag insertion machine (not shown) is attached to the saddle 1. The hole saw of the drilling machine is pressed against the outer periphery of the gas pipe P through the mounting hole 15 to form a drilling hole. Further, the gas bag insertion machine inserts the gas bag into the gas pipe P through the mounting hole 15 and the perforated hole. When the gas pressure in the gas pipe P is high, it is preferable to shut off the gas flowing in the gas pipe P before drilling by the drilling machine.

As described above, the saddle 1 may be mounted around the gas pipe P with the upper saddle portion 10 and the lower saddle portion 20 temporarily fixed in advance, or the lower saddle portion 20 may be gas. After hitting the upper saddle portion 10 below the pipe P and hitting the upper saddle portion 10 above the gas pipe P, the shaft portion 31 is engaged with the notch portion 32a to temporarily fix the upper saddle portion 10 and the lower saddle portion 20. It doesn't matter.

Further, the temporary fixing means 30 is not limited to the above-described configuration, and may have any configuration as long as the upper saddle portion 10 and the lower saddle portion 20 can be temporarily fixed. For example, instead of screwing the nut 51a into the tip of the shaft portion 51, it is conceivable to form the tip of the shaft portion 51 into a T shape that widens in the axial direction A.

Further, the shaft portion 51 and the receiving portion 52 may be provided as long as one is provided in the upper saddle portion 10 and the other is provided in the lower saddle portion 20, and the shaft portion 51 is provided in the upper saddle portion 10 and the receiving portion is provided. 52 may be provided in the lower saddle portion 20.

Further, the fixing means is not limited to the combination of the bolt B and the nut N as long as the upper saddle portion 10 and the lower saddle portion 20 can be fixed.

In this way, the saddle 1 is temporarily fixed to the temporary fixing means 30 with the upper saddle portion 10 and the lower saddle portion 20 sandwiching the gas pipe P, so that the worker can use one hand to temporarily fix the upper saddle portion 10 and the lower saddle portion 10 and the lower side. Since the upper saddle portion 10 and the lower saddle portion 20 can be fixed with the bolt B while supporting the saddle portion 20, the saddle 1 can be easily attached to the gas pipe P by one worker. Further, since the saddle 1 can be attached to the gas pipe P by one worker, the digging range of the ground set according to the work space of the worker can be reduced.

Further, by accommodating the shaft portion 51 in the notch portion 52a, the upper saddle portion 10 and the lower saddle portion 20 can be aligned in the vertical direction V, and the saddle 1 can be easily attached.

Further, since the nut 51a can come into contact with the claw portion 52b, it is possible to prevent the upper saddle portion 10 or the lower saddle portion 20 from being inadvertently dropped during the work.

In addition to the above, the present invention can be modified in various ways as long as it does not deviate from the spirit of the present invention, and it is natural that the present invention extends to the modified ones.

1 ・ ・ ・ Saddle 10 ・ ・ ・ Upper saddle part 11 ・ ・ ・ Side flange 12 ・ ・ ・ Bolt hole (of side flange) 13 ・ ・ ・ Central flange 14 ・ ・ ・ Bolt hole (of center flange) 15 ・・ ・ Mounting hole 16 ・ ・ ・ First seal groove 17 ・ ・ ・ Inner peripheral surface 18 ・ ・ ・ Second seal groove 20 ・ ・ ・ Lower saddle part 21 ・ ・ ・ Flange 22 ・ ・ ・ Bolt hole 23 ・ ・・ Contact surface 24 ・ ・ ・ Shaft 25 ・ ・ ・ Bolt 26 ・ ・ ・ Support part 30 ・ ・ ・ First O-ring 40 ・ ・ ・ Second O-ring 50 ・ ・ ・ Temporary fixing means 51 ・ ・ ・ Shaft Part 51a ・ ・ ・ Nut (head part)
51b ・ ・ ・ Through hole 52 ・ ・ ・ Receiving part 52a ・ ・ ・ Notch part 52b ・ ・ ・ Claw part B ・ ・ ・ Bolt (fixing means)
N ・ ・ ・ Nut (fixing means)

Claims (2)

A saddle that connects an external device to a pipe
A pair of saddles having a two-piece structure to which the external device can be attached and attached to the pipe,
Temporary fixing means for temporarily fixing the pair of saddles while sandwiching the pipe, and
With the pair of saddle portions temporarily fixed, the fixing means for fixing the pair of saddle portions and
Equipped with a,
The temporary fixing means is
A shaft portion having one end side pivotally attached to one of the pair of saddle portions and swinging the other end side toward the other of the pair of saddle portions.
A receiving portion provided on the other side of the pair of saddle portions and capable of engaging and disengaging the other end side of the shaft portion.
A saddle characterized by being equipped with. The shaft portion includes a head portion formed to be wider than the shaft portion.
The receiving portion includes a cutout portion for accommodating the shaft portion, the saddle according to claim 1, characterized in that it comprises a pawl portion to receive the head portion.

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