JP6095966B2 - Anticorrosion core removal device - Google Patents

Description

  The present invention relates to an anticorrosion core detaching device for removing an anticorrosion core attached for perforation prevention of a perforated part formed by perforating a pipe wall of a fluid pipe from the perforated part in a continuous flow state.

  Conventionally, when a perforated part is formed by perforating a pipe wall in a metal fluid pipe, the perforated part of the metal part is exposed, which may corrode and cause tap water contamination. Therefore, in order to prevent corrosion of the perforated portion, it is necessary to appropriately attach an anticorrosion core to the perforated portion in a continuous flow state. Therefore, an anticorrosion core is externally fitted to the core mounting tool body, and the anticorrosion core is inserted into the perforated portion by moving the core mounting tool forward from the branch pipe side, and in the axial direction of the core mounting tool body. The anticorrosion core is expanded from the inner peripheral surface in the outer diameter direction by the first, second, and third inclined portions that are provided and gradually expand in diameter, and the seal member on the outer periphery of the anticorrosion core is pressed against the inner wall of the hole to closely contact Core mounting tools have been developed (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 8-14481 (page 3, FIG. 3)

  However, as shown in Patent Document 1, although there is a conventional tool for attaching the anticorrosion core to the perforated portion from the branch portion side in the uninterrupted flow state, the anticorrosion core once attached to the perforated portion is continuously inflowed. No release device has been developed for removal in the state. Therefore, when it is necessary to replace a corrosion-resistant core that has deteriorated over time, or when it is not possible to accurately attach the corrosion-proof core, the corrosion-proof core is firmly attached so as not to be detached from the perforated portion. Could not be removed.

  This invention was made paying attention to such a problem, and it aims at providing the removal apparatus of the anticorrosion core which can remove the anticorrosion core easily from a piercing | piercing part in a continuous flow state.

In order to solve the above problems, the anticorrosion core detaching device of the present invention comprises:
A detaching device for removing the anticorrosion core attached to the perforated part of the fluid pipe,
Extending from the branch portion side of the housing surrounding the fluid conduit sealingly, comprising at least a branch portion and the rod member can be moved in the hermetically, and a distal end portion provided at the tip of the rod-shaped member,
The tip portion includes an engaging portion that engages with an outer peripheral surface of the anticorrosion core protruding from the perforated portion to the outside of the fluid pipe .
According to this feature, the tip portion in contact with the outer peripheral portion of the anticorrosion core is operated from the outside of the housing to move in the inner diameter direction of the perforated portion, and the anticorrosion core is forcibly deformed in the inner diameter direction. Since the diameter of the anticorrosion core can be reduced to a diameter smaller than the diameter of the perforated part, the anticorrosive core can be easily removed from the perforated part in an uninterrupted state.

The anticorrosion core detaching device of the present invention comprises:
The corrosive protection core is provided with a flange portion which is engaged with the periphery of the perforated portion protruding from the rear end to the outer diameter direction, the engaging portion of the tip engaging the engaging said flange portion It is characterized by having a projecting piece.
According to this feature, in the case where the engaging portion is moved in the radial direction of the drilling unit, the engagement between the engaging portion and the flange portion is ensured, the engagement portion can be prevented from being removed from the flange portion.

The anticorrosion core detaching device of the present invention comprises:
The distal end portion is fixed to the rod-shaped member, and the rod-shaped member is attached to the housing via a movable member movable at least in the radial direction of the perforated portion.
According to this feature, since the movable member can be moved in the radial direction of the drilling portion and the rod-shaped member is moved relative to the housing, the action portion can be easily moved in the radial direction of the punching portion. It is not necessary to use a special device that moves only the part.

The anticorrosion core detaching device of the present invention comprises:
The rod-shaped member has a drive portion extending along the rod-shaped member, and the engagement portion is movable in the radial direction of the perforated portion by driving the drive portion.
According to this feature, it is possible to move only the engaging portion in the radial direction of the drilling portion by operating and driving the driving portion extending along the rod-shaped member from the outside of the housing, There is no need to move the bar-like member relative to the housing.

The anticorrosion core detaching device of the present invention comprises:
The tip portion is characterized in that a holding piece is provided inside the engaging portion .
According to this feature, by contacting the inner peripheral surface of the anticorrosion core from the inside of the engagement portion that engages with the outer peripheral portion of the anticorrosion core, the anticorrosion core can be sandwiched between the engagement portion and the sandwiching piece, When the anticorrosion core is collected outside the housing, the anticorrosion core can be prevented from dropping from the tip.

It is front sectional drawing which shows the state by which the anticorrosion core was attached to the perforation part of the fluid pipe | tube in Example 1. FIG. It is a front view which shows the removal apparatus of the anticorrosion core in Example 1. FIG. It is front sectional drawing which shows the state which reached the front-end | tip part of the removal apparatus in Example 1 to the entrance vicinity position of the hole of a corrosion prevention core. It is a principal part enlarged view which shows the state by which the front-end | tip part of the removal apparatus was guided by the taper part. It is front sectional drawing which shows the state which hold | gripped the anticorrosion core with the nail | claw part and the leaf | plate spring part. It is front sectional drawing which shows a mode that a rod-shaped member is operated, a front-end | tip part is moved to the radial direction of a piercing | punching part, and a corrosion prevention core is removed from a piercing | punching part. It is front sectional drawing which shows the state which collect | recovered the anticorrosion cores removed from the punching part. FIG. 6 is a front cross-sectional view showing a modification of the tip portion in the first embodiment. (A) is front sectional drawing which shows the removal apparatus of the anticorrosion core in Example 2, (b) is side sectional drawing similarly, (c) is a bottom view similarly. It is front sectional drawing which shows the state which reached the front-end | tip part of the removal apparatus in Example 2 to the entrance vicinity position of the hole of a corrosion prevention core. It is front sectional drawing which shows the state which hold | gripped the anticorrosion core by the engaging part in Example 2. FIG. FIG. 10 is a front cross-sectional view showing a modification of the tip in showing Example 2. It is front sectional drawing which shows the state which hold | gripped the anticorrosion core by the engaging part of the front-end | tip part of FIG.

  EMBODIMENT OF THE INVENTION The form for implementing the removal apparatus of the anticorrosion core which concerns on this invention is demonstrated below based on an Example.

  The anticorrosion core detaching apparatus according to the first embodiment will be described with reference to FIGS. Hereinafter, the front side in FIG. 1 will be described as the front side (front side) of the fluid pipe.

  As shown in FIG. 1, the fluid pipe 2 of the present embodiment is made of, for example, ductile cast iron for waterworks buried in the ground, and is formed in a substantially circular shape in cross section, and the inner peripheral surface is powder-coated or Covered with a mortar layer. The fluid pipe according to the present invention may be made of other metals such as cast iron and steel. Furthermore, the inner peripheral surface of the fluid pipe is not limited to the mortar layer, and may be coated with, for example, an epoxy resin or the like, or an appropriate material may be coated on the inner peripheral surface of the fluid pipe with powder coating. Further, in this embodiment, the fluid in the fluid pipe is clean water, but the fluid flowing in the fluid pipe is not necessarily limited to clean water, for example, industrial water, agricultural water, sewage, etc., gas, gas and liquid The gas-liquid mixture may be used.

  As shown in FIG. 1, the fluid pipe 2 is externally fitted in a sealed manner by a housing 3 including a first divided member 3 a and a second divided member 3 b. In addition, the housing | casing 3 of a present Example may be the division | segmentation structure which consists of a several division | segmentation member divided into 3 or more bodies, or does not have a division | segmentation structure, but is a casting mold, welding, or machining Etc., it may be formed continuously. Furthermore, the material of the housing 3 is made of a metal material such as cast iron. However, various materials can be used as in the case of the fluid pipe described above as long as the material is applied according to the material of the fluid pipe. May be.

  The first divided member 3a is provided with a branch portion 3c extending in a direction substantially perpendicular to the fluid pipe 2, and an open / close valve device 16 capable of opening and closing the branch portion 3c is attached to the branch portion 3c. A fluid pipe network (not shown) is connected to the tip of the device 16 via a joint 6 and a connecting pipe 20. In addition, a perforation part 2a perforated by a perforation device (not shown) is formed on the pipe wall of the fluid pipe 2, and the fluid in the fluid pipe 2 branches to the fluid pipe network side via the perforation part 2a. ing. In addition, an anticorrosion core 5 is attached to the perforated part 2a in order to prevent the inner peripheral surface from which the metal part is exposed.

  The anticorrosion core 5 has a slightly larger diameter than the perforated portion 2a, is formed of an elastic body having elasticity, and is attached in pressure contact with the perforated portion 2a by its elastic force. Further, a flange portion 5a that is partially locked to the top of the fluid pipe 2 is provided on the edge of the anticorrosion core 5 on the branching portion 3c side (rear end side) in the circumferential direction. The anticorrosion core 5 does not fall into the tube 2. The anticorrosion core is not limited to one formed from an elastic body. For example, the anticorrosion core formed from a plastic body may be attached to the perforated portion by plastic deformation using a predetermined attachment device. Furthermore, the buttocks of the anticorrosion core are not necessarily provided.

  The anticorrosion core detaching device 1 shown in FIG. 2 (hereinafter referred to as the detaching device 1) is replaced when the anticorrosion core 5 described above cannot maintain the anticorrosion function of the perforated portion 2a due to deterioration over time or the like. In some cases, the anticorrosion core 5 is a device for removing the anticorrosion core 5 from the perforated portion 2a in the uninterrupted state.

  As shown in FIG. 2, the detaching device 1 is provided at the tip of the detaching device 1, and has a tip portion 9 having members that engage with the anticorrosion core 5, and a rod-like member 8 that extends rearward from the tip portion 9. The handle shaft 10 at the rear end of the rod-like member 8 for operating the detaching device 1 is mainly constituted.

  The tip 9 includes a long plate-like base member 17 having a long side in the radial direction of the rod-like member 8, a substantially L-shaped engagement member 18 attached to the base member 17, and the base member 17. And an auxiliary member 19 having a substantially L shape when viewed from the front. One end of the base member 17 in the longitudinal direction is detachably fixed to the tip of the rod-shaped member 8 by a detachable screw 25 (see FIG. 3). Therefore, the tip 9 can be replaced with a tip having a different shape depending on the application. The base member 17 is not limited to a long plate shape having long sides in the radial direction of the rod-shaped member 8, and may be formed in any shape such as a circular shape.

  The engaging member 18 is fixed to the surface of the base member 17 on the rod-like member 8 side with a bolt or the like, and extends from the fixing portion 15 to the distal end side, and is engaged with the outer peripheral portion of the anticorrosion core 5. And a pawl portion 14 that can be mated. Although this claw part 14 is explained in full detail later, in the anticorrosion core 5, the engaging part 14a which is an effect | action part of this invention which acts on the outer peripheral surface 5b of the collar part 5a of the anticorrosion core 5 from the outside of the fluid pipe | tube 2 A locking protrusion 14b that locks to the peripheral end surface 5c on the fluid pipe 2 side of the flange 5a, and has a substantially bowl shape, and the locking protrusion 14b is inclined so as to incline toward the tip. It has a portion 14c. Furthermore, although mentioned later, the site | part which contact | abuts to the outer peripheral surface 5b of the collar part 5a in the engaging part 14a becomes the high friction part 14d which is many uneven | corrugated shapes. The high friction portion 14d is not limited to a large number of concave and convex shapes. For example, a high friction portion may be formed by sticking a high-viscosity sheet to the engaging portion, or the high friction portion may be formed of a synthetic resin or the like. It does not matter as long as it has a relatively high friction coefficient.

  Further, the auxiliary member 19 is fixed to a surface of the base member 17 facing the surface on which the rod-shaped member 8 is attached with a bolt or the like, and extends from the fixed portion 191 to the distal end side, and is engaged with the engaging portion 14a. A leaf spring portion 192 that is a sandwiching piece of the present invention disposed on the inner side, and the tip of the leaf spring portion 192 becomes a tapered portion 192a that is inclined toward the inner diameter direction of the anticorrosion core 5. ing. Further, a part of the outer peripheral surface of the leaf spring part 192 is a high friction part 192b having a large number of irregular shapes. Further, the leaf spring portion 192 has a taper portion 192a positioned in the distal direction relative to the locking protrusion 14b of the claw portion 14.

  The engaging member 18 and the auxiliary member 19 are preferably made of a thin metal, synthetic resin, or the like, and are given a certain degree of elasticity. Note that a plurality of the engaging members 18 and the auxiliary members 19 may be provided for the base member. Furthermore, the engaging member 18 and the auxiliary member 19 are not limited to those connected to the base member with bolts or the like. For example, the engaging member 18 and the auxiliary member 19 may be fixed to the base member by welding or the like. The combined member and the auxiliary member may be integrally formed with the base member by casting or the like.

  Next, how the anticorrosion core 5 is removed in the uninterrupted state using the separation device 1 will be described with reference to FIGS. 3 to 7. First, the on-off valve device 16 is closed, and the connecting pipe 20 and the fluid pipe network are separated from the joint 6. Instead, as shown in FIG. 3, the short pipe 21 and the rubber joint which is the movable member of the present invention are used instead. 4 are attached in order, and then the detaching device 1 is connected via the lid member 12. More specifically, after the short pipe 21 and the rubber joint 4 are attached to the on-off valve device 16, the rod member 8 is inserted into the insertion hole 12a of the lid member 12 in a sealing manner, and the lid member 12 to which the detachment device 1 is attached. The detachment device 1 is connected to the on-off valve device 16 in a sealing manner by being fixed to the flange portion 4 a of the rubber joint 4.

  The short pipe 21 is provided at a position where a cylindrical body 21a into which the detaching device 1 is inserted is shifted from the pipe axis, which is the central axis of the fluid pipe 2, in the radial direction of the fluid pipe 2. In the tube 21 at a position avoiding the cylindrical body portion 21a, an introduction port 21b through which the image acquisition device 30 including the camera portion 30a and the operation shaft 30b can be introduced in a sealed manner is provided. Thereby, when inserting the detachment device 1, it becomes easier to insert the detachment device 1 toward the flange portion 5 a of the anticorrosion core 5 that is located in the radial direction of the fluid tube 2 from the tube axis of the fluid tube 2. The tip 9 can be aligned while confirming the periphery of the anticorrosion core 5 by the image acquisition device 30.

  In addition, since the rubber joint 4 has a structure in which the flange portions 4a and 4b are connected via the rubber member 4c, the rubber member 4c is attached to the flange portion 4b fixed to the flange portion of the short pipe 21. The flange portion 4a can be freely displaced within a range in which it can be elastically deformed. Note that the rubber joint 4 does not necessarily have to be used, and various types of movable members may be used as long as the rod-shaped member 8 can be freely moved back and forth and right and left.

  Next, the operator opens the on-off valve device 16 as shown in FIG. 3 and pushes in the handle shaft 10 to feed the detachment device 1 substantially horizontally toward the fluid pipe 2 in a sealed state. 9 is made to reach a position in the vicinity of the flange portion 5a of the anticorrosion core 5 attached to the perforated portion 2a.

  Subsequently, as shown in FIG. 4, the handle shaft 10 is pushed in to further feed the tip portion 9. At this time, since the taper portion 192a located closest to the tip end contacts the inner peripheral edge of the flange portion 5a, the tip portion 9 is guided while being slid along the taper portion 192a in the inner diameter direction of the anticorrosion core 5. Although not shown, for example, when the tip portion 9 is guided in the inner diameter direction of the anticorrosion core 5, even if the claw portion 14 comes into contact with the outer peripheral edge of the flange portion 5a, the claw portion 14 is protected by the inclined portion 14c. Since the core 5 is slid in the outer diameter direction, the claw portion 14 is locked to the flange portion 5a, so that the detachment device 1 cannot be inserted any further. Further, as described above, since the engaging member 18 and the auxiliary member 19 are given a certain amount of elastic force, the engaging portion 14a and the leaf spring portion 192 are guided to an appropriate position very smoothly by the elastic force. Is done.

  As shown in FIG. 5, the engaging portion 14 a and the leaf spring portion 192 after being guided to an appropriate position face a part in the circumferential direction in the vicinity of the flange portion 5 a of the anticorrosion core 5 by the elastic restoring force. Grasping from the direction to the radial direction with a narrow pressure. At this time, the locking protrusion 14b of the claw portion 14 is locked to the peripheral end surface 5c of the flange portion 5a on the fluid pipe 2 side, and the high friction portion 14d of the claw portion 14 and the leaf spring portion 192. Since the high friction portion 192b comes into contact with the outer peripheral surface 5b and the inner peripheral surface of the flange portion 5a, the engagement force to the anticorrosion core 5 is improved.

  Thus, since the front-end | tip part 9 can be inserted from the outer position of the fluid pipe | tube 2 near the collar part 5a of the anticorrosion core 5 located in the branch part 3c side rather than the outer peripheral surface of the fluid pipe | tube 2, a nail | claw part 14 and the leaf spring part 192 are easy to approach the anticorrosion core 5, the distance for inserting and moving the detaching device 1 is shortened, and the tip part 9 is easily engaged with the flange part 5 a of the anticorrosion core 5. be able to.

  Next, as shown in FIG. 6, the handle shaft 10 is swung back and forth and right and left with the rubber joint 4 as a fulcrum with the tip 9 gripping the anticorrosion core 5. When the handle shaft 10 is swung, the portion where the tip portion 9 faces the portion where the anticorrosion core 5 is gripped is pressed against the inner peripheral surface of the perforated portion 2a, and the portion where the tip portion 9 grips the anticorrosion core 5 is forced. Therefore, the diameter of the anticorrosion core 5 is partially reduced to be smaller than the diameter of the perforated portion 2a, and the adhesion between the anticorrosive core 5 and the perforated portion 2a is peeled off. Further, when the handle shaft 10 is swung, the range in which the adhesion between the anticorrosion core 5 and the perforated part 2a is gradually increased, and the adhesion between the anticorrosive core 5 and the perforated part 2a is eventually released over the entire circumference. The anticorrosion core 5 is removed from the perforated part 2a. As described above, the flange portion 5a is formed to be the thickest in the anticorrosion core 5 and has a relatively high strength. Even if the anticorrosion core 5 is deformed, the flange portion 5a is difficult to deform, so that the distal end portion 9 is not detached.

  When the anticorrosion core 5 is removed from the perforated portion 2a, as shown in FIG. 7, when the handle shaft 10 is retracted and the tip portion 9 is pulled out, the locking protrusion 14b of the flange portion 5a Since the peripheral end surface 5 c is locked, the anticorrosion core 5 is pulled out together with the tip end portion 9 and is collected from the housing 3 in an uninterrupted state. That is, the anticorrosion core 5 detached from the perforated portion 2a is passed through the opening / closing valve device 16 together with the tip portion 9, and when it passes, the opening / closing valve device 16 is closed again, and the short tube 21, the rubber joint 4, the lid member 12 is removed, the recovery operation of the anticorrosion core 5 is completed in an uninterrupted state.

  Further, in the distal end portion 9 of this embodiment, the engaging member 18 and the auxiliary member 19 are attached to the base member 17. However, like the distal end portion 9 'shown in FIG. It is also possible to engage with the anticorrosion core 5 only by the engaging member 18 without being provided. Thereby, since the number of parts applied to the tip portion 9 'can be reduced, not only the production cost can be suppressed, but also the weight of the tip portion 9' can be reduced and the tip portion 9 'can be easily operated.

  As described above, the detaching device 1 of the present invention moves the rod-shaped member 8 in a sealed state, and the claw portion 14 including the engaging portion 14a and the locking protrusion 14b from the outside of the fluid pipe 2 is connected to the anticorrosive core. 5, the operator operates the handle shaft 10 from the outside of the housing 3 with the rubber joint 4 as a fulcrum, and is drilled by engaging the flange 5 a of the arm 5 with the flange 5 a of the anticorrosion core 5. By moving in the inner diameter direction of the portion 2a and forcibly deforming the anticorrosion core 5 in the inner diameter direction, the diameter of the anticorrosion core 5 can be reduced to be smaller than the diameter of the perforated portion 2a. Therefore, the anticorrosion core 5 can be easily removed from the perforated part 2a in a continuous flow state.

  In addition, by reducing the diameter of the anticorrosion core 5 and engaging the engaging protrusion 14b with the peripheral end surface 5c of the flange portion 5a of the anticorrosion core 5 removed from the perforation portion 2a, the distal end portion 9 becomes the perforation portion. When moving in the radial direction of 2a, the engagement between the engagement portion 14a and the flange portion 5a is ensured, and the engagement portion 14a can be prevented from coming off from the flange portion 5a. Therefore, the anticorrosion core 5 can be recovered outside the housing 3 in a continuous flow state by moving the rod-like member 8 in a state where the engaging portion 14a and the flange portion 5a are engaged.

  The distal end portion 9 is connected and fixed to the distal end of the rod-like member 8, and the operator deforms the rubber joint 4 and swings the rod-like member 8 back and forth and right and left to engage the engaging portion 14 a. Since it can be easily moved in the radial direction of the perforated part 2a, it is not necessary to use a special device that moves only the engaging part 14a.

  Moreover, the leaf | plate spring part 192 can hold | maintain the corrosion prevention core 5 with the engagement part 14a and the leaf | plate spring part 192 by contact | abutting to the internal peripheral surface of the corrosion prevention core 5 from the inner side of the engagement part 14a, When the core 5 is collected outside the housing 3, the anticorrosion core 5 can be prevented from dropping from the tip portion 9.

  Moreover, since the engaging part 14a and the leaf | plate spring part 192 are each provided with the high friction parts 14d and 192b and the frictional force to the anticorrosion core 5 is increasing, the anticorrosion core 5 removed from the perforation part 2a is attached. Even when recovering from the housing 3 in a continuous flow state, the anticorrosion core 5 is prevented from coming off between the engagement portion 14 a and the leaf spring portion 192.

  Note that the locking protrusion 14b and the high friction part 14d in the claw part 14 are not necessarily provided both. For example, the high friction part 14d is not particularly provided, and the locking protrusion 14b is provided on the fluid pipe 2 side. The anticorrosion core 5 may be prevented from falling from the composite portion only by being locked to the peripheral end surface 5c, or the locking protrusion 14b is not specially provided, and only the frictional force of the high friction portion 14d is used to remove from the composite portion. The anticorrosion core 5 may be prevented from falling. Furthermore, the locking protrusion 14b and the high-friction portion 14d are not particularly provided, and the anticorrosion core from the composite portion can be simply gripped in the thickness direction of the anticorrosion core 5 by the elastic restoring force of the engagement portion and the leaf spring portion. You may prevent 5 falling.

  Next, the anticorrosion core detaching apparatus according to the second embodiment will be described with reference to FIGS. In addition, the description which overlaps with the same structure as the said Example is abbreviate | omitted. In addition, the anticorrosion core 51 in a present Example is formed from the plastic body, and the perforation part 2a is carried out by plastically deforming the front end side and rear end side of the anticorrosion core 51 toward an outer peripheral side with the predetermined | prescribed attachment apparatus which is not shown in figure. The aspect attached to will be described.

  The main body of the anti-corrosion core detaching device 11 of the second embodiment will be described with reference to FIG. As shown in FIGS. 9A and 9B, the rod-like member 80 has a through-hole 80a penetrating in the axial direction inside, and the rotation that is the drive portion of the present invention is formed in the through-hole 80a. A moving shaft 60 is inserted in a sealed manner so as to be rotatable around the axis. Further, as shown in FIG. 9A, the tip end of the rotation shaft 60 protrudes to the tip end side from the rod-shaped member 80, and a gear 60a described later is fixed to the outer peripheral surface. As will be described later, the rotation shaft 60 is driven by appropriately rotating an operation portion 60b protruding from the rear end portion of the rotation shaft 60 to the outside of the handle shaft 100. The operation unit may be operated using a dedicated or general-purpose tool adapted to the shape of the operation unit 60b, or may be operated by directly grasping the operator. Alternatively, the operation unit may not be provided and the rotation shaft may be driven by electric control. Furthermore, the rotation shaft 60 is not limited to the embodiment of the present embodiment, and may be provided as long as it is provided along an appropriate position of the rod-shaped member.

  Further, as shown in FIGS. 9A and 9C, the gear 60a of the rotating shaft 60 is engaged with a pair of engagement members 13 and 13 via engagement portions 13a and 13a. The members 13 and 13 are supported by attachment portions 7 and 7 attached to an overhanging portion 80b projecting from the tip of the rod-like member 80 in the outer diameter direction. The attachment portions 7 and 7 have a substantially U-shaped cross-sectional view that opens toward the gear 60a, and can accommodate the meshing members 13 and 13 therein, respectively.

  Further, as shown in FIG. 9C, the engagement members 13, 13 have arms 22, 22 extending in a direction substantially orthogonal to the axial direction of the rotation shaft 60. That is, when the operating portion 60b is rotated and the rotating shaft 60 is appropriately rotated, the meshing members 13 and 13 are operated in the radial direction of the rotating shaft 60 via the gear 60a and the meshing portion 13a. Accordingly, the arms 22 are moved closer to or away from each other. Note that the number of arms is not necessarily limited to two, and may be one or three or more, for example.

  Further, as shown in FIGS. 9B and 11, the arms 22, 22 are engaged with the flange portion 51 a of the anticorrosion core 51 bent on the outer peripheral surface of the fluid pipe 2 on the branch portion 3 c side. The joint portions 140 and 140 are provided, and a high friction portion 140 d is formed inside the engagement portions 140 and 140. The arms 22 and 22 are preferably formed of a hard material having a relatively high rigidity so that the arms 22 and 22 can be easily brought close to or separated from each other. Thus, the front-end | tip part 90 of a present Example is comprised from the meshing members 13 and 13, the attachment parts 7 and 7, and the arms 22 and 22. As shown in FIG.

  Next, how the anticorrosion core 51 is removed in the uninterrupted state using the separation device 11 will be described with reference to FIGS. 10 and 11. First, the on-off valve device 16 is closed, the short tube 211 is attached, and then the detachment device 11 is connected via the lid member 121. The tube axis of the cylindrical portion 211 a of the short tube 211 of the present embodiment is orthogonal to the tube axis that is the central axis of the fluid tube 2.

  Next, as shown in FIG. 10, the operator opens the on-off valve device 16 and pushes the handle shaft 100 described above to send the detachment device 11 in the direction of the fluid pipe 2 to perforate the tip 90. It reaches the position near the anticorrosion core 51 attached to the part 2a. At this time, the image acquisition device 30 is introduced in a sealed manner into the branch portion 3c via the inlet 3d provided in the branch portion 3c, so that the operator can grasp the position of the tip portion 90. .

  Further, as shown in FIGS. 10 and 11, the lid member 121 is provided with a guide portion 121 a that restricts the rotation of the detaching device 11 and guides the insertion direction. When the device 11 is pushed in, the guide portion 121a guides the insertion direction of the detachment device 11 while the circumferential position of the tip portion 90 is fixed. Inserted accurately toward the position.

  Next, as shown in FIG. 11, the operation portion 60 b is rotated in a state where the rod-shaped member 80 is fixed so as not to rotate, the engagement portions 140 and 140 are separated from each other, and the flange portion 51 a of the anticorrosion core 51. The positions of the engaging portions 140 and 140 are adjusted so as to conform to the diameter of each. Thereafter, the handle shaft 100 is pushed in to feed the distal end portion 90 toward the fluid pipe 2, and the distal end portion 90 is engaged with the flange portion 51 a of the anticorrosion core 51. Then, the engagement portions 140 and 140 are brought close to each other, and the flange portion 51a of the anticorrosion core 51 is tightly gripped in the inner diameter direction by the engagement portions 140 and 140, and the handle shaft 100 is pulled out from this state. Is detached from the perforated part 2a.

  Thus, only the engaging portions 140 and 140 are armed by driving the rotation shaft 60 extending along the penetrating portion 80a of the rod-shaped member 80 by rotating the operation portion 60b positioned outside the housing 3. Since it is possible to move in the direction of diameter reduction / expansion of 22, 22, it is not necessary to move the rod-shaped member 80 relative to the housing 3.

  In addition, the engagement portions 140 and 140 can be appropriately positioned in accordance with the outer diameter of the flange portion 51a of the anticorrosion core 51 to be removed by adjusting the radial position by the arms 22 and 22. Further, the engagement portions 140 and 140 are brought closer to each other by the arms 22 and 22 so that the flange portion 51a of the anticorrosion core 51 is tightly gripped in the inner diameter direction, and the anticorrosion core 51 is forcibly plastically deformed in the inner diameter direction. The anticorrosion core 51 can be removed from the perforated part 2a. Furthermore, when the rod-shaped member 80 is moved backward in this state, the anticorrosion core 51 is reduced in diameter, so that the anticorrosion core 51 can be removed from the perforated portion 2a.

  Even if the engagement state between the anticorrosion core 51 and the perforated portion 2a is not completely released, the handle shaft 100 is pulled out by the strong gripping force of the engagement portions 140 and 140 to the anticorrosion core 51. The force in the direction of separation is efficiently transmitted, and the anticorrosion core 51 can be forcibly detached from the perforated portion 2a with a strong force. That is, even if the anticorrosion core 51 is firmly attached, the removal work can be performed very effectively. The anticorrosion core 51 is slid down from between the engagement portions 140 and 140 by the strong gripping force of the engagement portions 140 and 140 on the flange portion 51a of the anticorrosion core 51 and the high friction portion 140d of each engagement portion 140. Can be prevented.

  Next, a modified example of the anticorrosion core detaching apparatus in Embodiment 2 will be described with reference to FIGS. It should be noted that the same components as those shown in the above-described embodiment are denoted by the same reference numerals and redundant description is omitted.

  As shown in FIGS. 12 and 13, the attachment portions 71 and 71 of the distal end portion 91 of the present modification are provided so as to project from the distal end side, and have auxiliary sides having long sides in the coaxial direction with the arms 22 and 22. 29 and 29, and both end portions of each auxiliary member 29 in the longitudinal direction are sandwiching pieces 29 a and 29 a that press against the inner peripheral surface of the anticorrosion core 51.

  According to this, when the rear end side of the anticorrosion core 51 is narrowed in the inner diameter direction by the engaging portions 140 and 140 of the arms 22 and 22, the sandwiching pieces 29 a and 29 a of the auxiliary members 29 are connected to the inner periphery of the anticorrosion core 51. Since the pressing is applied to the surface to assist, the engagement portions 140 and 140 of the arms 22 and 22 are easily held in a narrow pressure by the anticorrosion core 51.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above-described embodiment, the engaging portion 14a of the claw portion 14 is configured to be locked to the outer peripheral surface 5b of the flange portion 5a in the anticorrosion core 5, but the present invention is not limited to this, What is necessary is just to act from the outside of the fluid pipe 2, for example, it may be made to act on the cylindrical outer peripheral part located in the fluid pipe 2 side rather than the collar part 5a of the anticorrosion core 5, or a perforation part It may be inserted into the gap between 2a and the anticorrosion core 5 from the outside of the perforated portion 2a so as to act on the outer peripheral portion of the anticorrosion core. The action portion may have a sharp projecting piece at the tip, and the projecting piece may be stabbed into and engaged with the outer peripheral portion of the anticorrosion core.

  Moreover, in the said Example, although demonstrated so that it might act on a part of outer peripheral surface of the anticorrosion core 5, for example, the cylindrical effect | action part provided with an inner peripheral surface larger than the outer peripheral surface of an anticorrosion core is used for an anticorrosion core. The anticorrosion core may be removed from the perforated part by contacting the entire outer peripheral surface and moving the action part in the radial direction of the perforated part.

  Moreover, although the position of the nail | claw part 14 was performed confirming the periphery of the anticorrosion core 5 with the image acquisition apparatus 30, the image acquisition apparatus does not need to be provided especially.

  In addition, the detachment device 1 is configured to move forward and backward toward the anticorrosion core 5 by the operator holding the handle shaft 10 and pushing or pulling it. May be used to move the detachment device forward and backward toward the anticorrosion core.

  Further, the anticorrosion core may have a friction coefficient increased by forming a plurality of grooves on the outer peripheral surface on the rear end side.

  Further, the detaching device is not necessarily limited to a device used for detaching the anticorrosion core that prevents the perforated portion, and may be used for detaching the reinforcing core that reinforces the structural strength around the perforated portion, for example.

DESCRIPTION OF SYMBOLS 1 Separation apparatus 2 Fluid pipe 2a Perforation part 3 Case 3c Branch part 4 Rubber joint (movable member)
DESCRIPTION OF SYMBOLS 5 Corrosion-proof core 5a The collar part 8 The rod-shaped member 9 The front-end | tip part 11 Detachment apparatus 14 Claw part 14a Engaging part (action part)
14b Locking protrusion 14d High friction part 22 Arm 29a Clamping piece 51 Corrosion-proof core 51a Ridge part 60 Rotating shaft (drive part)
80 Rod-shaped members 90 and 91 Tip portion 140 Engagement portion (action portion)
140d high friction part 191 fixing part 192 leaf spring part (clamping piece)
192a Tapered part 192b High friction part

Claims (5)

A detaching device for removing the anticorrosion core attached to the perforated part of the fluid pipe,
Extending from the branch portion side of the housing surrounding the fluid conduit sealingly, comprising at least a branch portion and the rod member can be moved in the hermetically, and a distal end portion provided at the tip of the rod-shaped member,
The anticorrosion core detaching device according to claim 1, wherein the distal end portion includes an engagement portion that engages with an outer peripheral surface of the anticorrosion core protruding from the perforated portion to the outside of the fluid pipe . The corrosive protection core is provided with a flange portion which is engaged with the periphery of the perforated portion protruding from the rear end to the outer diameter direction, the engaging portion of the tip engaging the engaging said flange portion The anticorrosion core detaching device according to claim 1, further comprising a projecting piece.   The distal end portion is fixed to the rod-shaped member, and the rod-shaped member is attached to the casing via a movable member that is movable at least in a radial direction of the perforated portion. Item 3. The anticorrosion core removal apparatus according to Item 1 or 2. The rod-shaped member has a drive portion extending along the rod-shaped member, and the engagement portion is movable in a radial direction of the perforated portion by driving the drive portion. The anticorrosion core detaching device according to any one of 1 to 3. The anticorrosion core detaching device according to any one of claims 1 to 4, wherein the tip portion includes a clamping piece inside the engagement portion .

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