JP5389388B2 - On-off valve removal means - Google Patents

Description

  The present invention relates to an on-off valve removing means for removing an on-off valve connected in communication with an existing fluid pipe in an uninterrupted state and a method thereof.

  Conventionally, at a predetermined location of an existing fluid pipe, a deterrent body is installed that has an annular sealing member that seals between the inner peripheral surface of the existing fluid pipe and suppresses the flow of fluid. (For example, refer to Patent Document 1).

Japanese Patent Laid-Open No. 8-14440 (page 4, FIG. 2)

  However, in Patent Document 1, after the restraining body is pushed to the installation position inside the recessed groove formed along the inner peripheral surface of the existing fluid pipe, the engaging portion provided in the restraining body is recessed. Since it is the structure inserted in a groove | channel, high precision was requested | required in the installation position of a suppression body, ie, the position of the pushing direction, and the position of an insertion direction, and there existed a possibility that installation of a suppression body might become difficult.

  The present invention has been made paying attention to such problems, and by removing the on-off valve in an uninterrupted flow state by easily installing a deterrent body at a predetermined location of an existing fluid pipe to inhibit the flow of fluid. It is an object of the present invention to provide an on-off valve removing means and a method thereof.

In order to solve the above problem, the on-off valve removing means according to claim 1 of the present invention comprises:
An on-off valve removing means for removing the on-off valve connected to the existing fluid pipe in an uninterrupted state,
A front peripheral surface Ru provided with a sealing member annular sealing between the inner peripheral surface of the existing fluid tube, and a rear peripheral surface consisting of the circumferential surface of the small diameter than the front peripheral surface which is disposed at the back, the comprising, a suppression body boundary between the front peripheral face and the rear peripheral surface to inhibit flow of fluid comprising an engagement portion for movement restriction,
An installation device comprising a housing portion for housing the deterrent body in a sealed manner, and installing the deterrent body at a predetermined location from the housing portion via the on-off valve;
An engaged portion that can be moved to a standby state or a protruding state in which the protrusion is prevented from protruding toward the inside of the existing fluid pipe by an external operation ; and a step portion that abuts and restricts movement of the deterrence member in the insertion direction. The existing fluid pipe comprising :
Consists of
The relationship between the stepped portion, the restraining body, and the engaged portion is when the stepped portion and the restraining body are in contact with each other, and the protruding engaged portion is in contact with the rear peripheral surface. , When moving in a direction opposite to the insertion of the deterrent body, the engaged portion in the protruding state engages with the engaging portion ,
In the standby state of the engaged portion, the installation device moves the deterrence member from the storage unit toward the stepped part via the on-off valve, and brings the deterrence member into contact with the stepped part. In the state, the engaged portion is moved to the protruding state.
According to this feature, the restraining body is engaged in the standby state of the engaged portion by the installation device that includes the accommodating portion that accommodates the restraining body in a sealed manner and is connected to the on-off valve so as to communicate with the existing fluid pipe. The joint portion moves toward a predetermined location without the possibility of interference with the joint, and after the deterrence member moves to the predetermined location, the engaged portion is switched to the protruding state, and the engaging portion of the deterrence member is changed to the engaged portion. The on-off valve can be easily removed in the uninterrupted flow state by engaging and suppressing the flow of the fluid by the suppressing body at a predetermined location of the existing fluid pipe.

The on-off valve removing means according to claim 2 of the present invention is the on-off valve removing means according to claim 1,
A communication passage is formed in the deterrence body so as to communicate between the predetermined portion side and the housing portion side so as to be openable and closable.
According to this feature, a communication passage is formed in the deterrence body so as to open and close the predetermined portion side and the accommodating portion side, and the communication passage is opened when the deterrence member moves toward the predetermined portion. Since the fluid also circulates to the accommodating portion side through the communication passage, the pressure difference due to the fluid before and after the deterring body is eliminated, and the deterring body is easily moved.

The on-off valve removing means according to claim 3 of the present invention is the on-off valve removing means according to claim 2,
The installation apparatus includes an opening valve that can open the housing portion.
According to this feature, when the restraining body is moved toward a predetermined location, the opening valve is opened to easily replace the air in the housing portion with the fluid flowing to the housing portion side, so that the fluid is contained in the housing portion. Easy to distribute to the side.

The on-off valve removing means according to claim 4 of the present invention is the on-off valve removing means according to any one of claims 1 to 3,
The installation device is a sealed state of the sealing member that seals between an unsealed state of the sealing member that can move the deterrence member toward the predetermined location and an inner peripheral surface of an existing fluid pipe at the predetermined location. In addition, it is characterized by being switchable.
According to this feature, the sealing device seals between the non-sealed state of the sealing member that can move the deterrent body toward the predetermined location and the inner peripheral surface of the existing fluid pipe at the predetermined location by the installation device. In addition, since it is possible to switch, the sealing member can be placed in a predetermined position without being damaged as the non-sealed state when the restraining body is moved toward the predetermined position.

The on-off valve removing means according to claim 5 of the present invention is the on-off valve removing means according to claim 4,
The inner surface of the existing fluid pipe at the predetermined location is provided with a tapered surface that is reduced in diameter along the insertion direction of the deterrence body , and the sealing member is brought into contact with the tapered surface by the movement of the deterrence member. It is characterized by switching from the sealed state to the sealed state.
According to this feature, the sealing member is in contact with the inner surface of the existing fluid pipe at the predetermined position formed in the tapered surface that is reduced in diameter along the moving direction only by moving the deterrence member toward the predetermined position. Therefore, it is possible to easily switch from the non-sealed state to the sealed state without requiring a separate process.

  Examples of the present invention will be described below.

  Embodiment 1 of the present invention will be described with reference to the drawings. First, FIG. 1 is a schematic view showing an attaching process of an on-off valve removing means in Embodiment 1 of the present invention. FIG. 2 is a schematic view showing the moving process. Fig.3 (a) is an expanded sectional view which showed the communicating path through which the fluid distribute | circulates before and behind a suppression body, (b) is AA sectional drawing of (a). FIG. 4 is an enlarged cross-sectional view showing the removing process.

  As shown in FIG. 1, a main pipe 1 through which a fluid flows and a branch pipe 2 that branches substantially perpendicularly to the main pipe 1 constitute an existing fluid pipe. Is in circulation. The flange 2a formed at the end of the branch pipe 2 is connected to a flange 5c on one end side of the on-off valve 5 mainly used for drainage in a watertight manner, and the valve body 5b in the valve housing 5a is in a closed state. The flow of the fluid in the pipe is blocked. A special member is not connected to the flange 5d on the other end side of the on-off valve 5 at the normal time shown in the figure, and a drainage hose or the like (not shown) can be connected at the time of drainage. In addition, the fluid which distribute | circulates the existing fluid pipe | tube is not necessarily restricted to tap water, You may be another kind of liquid or gas.

  Perforations 2b and 2b penetrating the upper and lower tube walls are respectively formed at predetermined locations in the center of the branch pipe 2 in the drawing, and sleeves 3a and 3a communicating with the perforations 2b and 2b are provided. The engaged bolt 3b as the engaged portion is screwed into the female screw portion of the sleeve 3a in a watertight manner with the tip portion 3c not protruding from the inside of the branch pipe 2. Note that the above-described engaged portions are not limited to being provided above and below the branch pipe, and may be provided on the left and right at a substantially central height position of the branch pipe, for example. In this way, it is possible to avoid the possibility that impurities in the branch pipe are mixed. Furthermore, the engaged parts are not limited to the two places described above, and may be provided at predetermined places according to the number of engaging parts described later.

  The inner peripheral surface of the branch pipe 2 is formed on a tapered surface 2c that gradually decreases in diameter from the on-off valve 5 side to the predetermined location and toward the main pipe 1 side, and a step portion on the main pipe 1 side of the tapered surface 2c. 2d is formed.

  Next, the on-off valve removing means will be described. The on-off valve removing means installs the deterrence body 10 that inhibits the flow of fluid at the predetermined position of the branch pipe 2 and the deterrence body 10 at the predetermined position as will be described later. The installation apparatus 20 is mainly configured. The restraining body 10 is connected to a handle 27 for operation via an insertion shaft 24, a non-interlocking joint 25, and a feed shaft 26, one end of which is inserted in a watertight manner in a housing portion 22 that houses the right side of the restraining body 10 in the figure. Yes. Each member connected to the restraining body 10 constitutes an installation device 20. The feed shaft 26 is fitted into a support plate 29 supported by two support shafts 28, 28 erected on the flange 21 integral with the accommodating portion 22.

  3 (a) and 3 (b), the restraining body 10 will be described in detail. The restraining body 10 is an annular elastic body as a sealing member in the groove portion 11c along the front peripheral surface on the left side of the drawing. It mainly comprises an engaging top 11 provided with a certain O-ring 14 and a bolt 15 provided with a nut on the tip side and screwed onto the engaging top 11. The engagement top 11 is formed with a communication passage R communicating with the front and rear surfaces in the axial direction. The backup ring 13 and one end of the communication passage R are closed on one end side of the engagement top 11 in this order from the nut side. A gasket 16 made of a possible elastic body is fitted into the bolt 15. Further, a spring body 17 having a diameter smaller than that of the gasket 16 is inserted into the bolt 15 and urged in a direction in which the backup ring 13 and the engagement top 11 are separated from each other. In addition, a stepped portion that is continuous between the front peripheral surface of the engagement top 11 and the rear peripheral surface on the right side of the drawing having a smaller diameter than the front peripheral surface is formed as an engagement portion 11b described later. Further, the connection of the restraining body 10 will be described. The end of the insertion shaft 24 is screwed to the other end of the engagement top 11.

  Next, removal of the on-off valve by the on-off valve removing means will be described in the order of steps.

  As shown in FIG. 1, the attachment process will be described. The flange 21 constituting the installation device 20 is connected to the flange 5 d on the other end side of the on-off valve 5 in a watertight manner. By doing in this way, the suppression body 10 will be watertightly accommodated inside the illustration right side in the housing | casing part 22 and the valve housing | casing 5a connected to the accommodating part 22. FIG. The insertion shaft 24 and the feed shaft 26 connected to the restraining body 10 are positioned substantially coaxially with the branch pipe 2.

  Next, as shown in FIG. 2, the movement process will be described. The valve body 5b is opened by rotating the valve shaft 5e of the on-off valve 5, and the restraining body 10 is moved in the axial direction (left in the figure) by the handle 27. Direction) from the accommodating portion 22 through the on-off valve 5 toward the predetermined location. By opening the valve body 5b, the fluid in the existing fluid pipe flows in the right direction in the figure. That is, as shown in FIG. 3A, the fluid flows from the front side of the restraining body 10 through the outer periphery of the backup ring 13 and the gasket 16 and the communication path R of the engaging top 11. It circulates in the accommodation part of the back side. By doing in this way, the pressure difference by the fluid before and behind the suppression body 10 is eliminated, and the suppression body 10 is easy to move. At this time, since the gap between the gasket 16 and the front surface of the engagement top 11 where the communication path R is formed is separated by a predetermined amount by the urging of the spring body 17, the communication path R is opened. It distributes reliably before and after the deterrent body 10. In particular, the inner diameter of the valve housing 5a of the on-off valve 5 is relatively smaller than the inner diameter of the branch pipe 2, and the outer surface of the O-ring 14 of the deterring body 10 interferes with the inner surface of the valve housing 5a in the moving process, so that the fluid Even when it is difficult to circulate back and forth on the outer surface side of the deterrent body 10, it can be reliably circulated through the communication path R described above.

  In this moving process, the release valve 30 communicating with the opening 22a formed in the accommodating portion 22 is appropriately opened by the operation portion 30a. By doing in this way, the original air in the accommodating part 22 is discharge | released from the opening 31, ie, the original air in the accommodating part 22 and the fluid which flows in into the accommodating part 22 side can be replaced easily, Since it is easy to distribute | circulate to the accommodating part 22 side, the differential pressure before and behind the suppression body 10 can be eliminated immediately. By pulling out the air in the housing part 22, the pressure becomes substantially the same as the water pressure in the pipe, but when the pressure gauge 32 is stably confirmed, the release valve 30 is closed.

  In this movement process, the O-ring 14 fitted in the groove 11c of the engagement top 11 is in an unsealed state to which a compression force described later is not applied. There is no risk of contact with and interference with the sleeve portion of the valve 5 or the inner surface of the branch pipe 2.

  Furthermore, in this moving process, the engaged bolt 3b is in a standby state in which the tip 3c does not protrude inward from the inner peripheral surface of the branch pipe 2, and the protrusion to the inside of the branch pipe 2 is refrained. Therefore, the engaged bolt 3b does not interfere with the restraining body 10.

  When the front end face 11a of the engaging top 11 located on the front side of the restraining body 10 comes into contact with the step 2d formed on the inner surface of the branch pipe 2, the movement of the restraining body 10 to the predetermined position is completed. In this way, by using the contact between the front end surface 11a of the engagement top 11 and the stepped portion 2d of the branch pipe 2, the arrangement of the restraining body 10 at the predetermined position is facilitated.

  In addition, the feed shaft 26 integrally connected to the handle 27 and the insertion shaft 24 connected to the engagement top 11 constituting the restraining body 10 are a jointless joint 25 which is a joint in which the rotation around the shaft is not interlocked. Therefore, even when the handle 27 is rotated about the axis when the handle 27 is pressed in the axial direction, the unlinked joint 25 causes the rotation to be performed by the insertion shaft 24. In other words, the restraining body 10 can move only in the axial direction without rotating, and the risk of sliding the O-ring 14 in the circumferential direction by rotating in the moving process can be avoided.

  Next, as shown in FIGS. 3A and 3B, the engagement restraining process will be described. The restraining body 10 is moved to a predetermined position by the installation device 20 to be fitted into the groove portion of the engaging top 11. The combined O-ring 14 is clamped between the tapered surface 2c having a reduced diameter at a predetermined location, so that the fluid flow between the tapered surface 2c and the engagement top 11 is sealed. It becomes.

  In this way, the inner surface of the branch pipe 2 at the predetermined position where the O-ring 14 as the sealing member is formed on the tapered surface 2c whose diameter is reduced along the moving direction simply by moving the restraining body 10 toward the predetermined position. Since the contact state is switched to the sealed state, it is possible to easily switch from the unsealed state to the sealed state without requiring a separate step.

  The O-ring 14 that seals between the non-sealed state of the O-ring 14 as a sealing member that can move the restraining body 10 toward a predetermined location by the installation device 20 and the inner peripheral surface of the branch pipe 2 at the predetermined location. Since the switchable state can be switched to the sealed state, the O-ring 14 can be disposed at the predetermined position without being damaged as the non-sealed state when the restraining body 10 is moved toward the predetermined position.

  On the other hand, the engaged bolt 3b is screwed into the branch pipe 2 to switch the tip portion 3c to a protruding state in which the tip portion 3c protrudes into the branch tube 2, and the tip portion 3c is switched to the engaging portion of the engaging top 11. 11b or the rear peripheral surface behind the engaging portion 11b. And the engaging part 11b engages with the to-be-engaged bolt 3b by moving the suppression body 10 in the direction opposite to the moving direction described above by the pressure of the fluid or the operation of the handle 27. Thus, the engagement part 11b engages with the engaged bolt 3b, so that the movement of the engagement piece 11 is also restricted in the removing step described later.

  By the end of this engagement inhibiting step, the fluid flow is inhibited at a predetermined location of the branch pipe 2.

  In the present invention, to suppress the flow of fluid means to completely block the flow of fluid before and after the suppressor 10 or after sealing between the inner peripheral surface of the existing fluid pipe with an annular sealing member. Any aspect of the aspect that allows a relatively small amount of fluid to flow through the communication passage R that passes through the ring of the sealing member is included.

  Next, as shown in FIG. 4, the removal process will be described. As described above, the installation device 20 is removed from the on-off valve 5 in an uninterrupted state in a state where the flow of the fluid is suppressed by the suppressor 10. The on-off valve 5 is removed from the branch pipe 2. Alternatively, the on-off valve 5 may be removed from the branch pipe 2 while the installation device 20 is attached to the on-off valve 5.

  Regarding the removal of the installation device 20, in detail, the insertion shaft 24 is removed from the engagement top 11 and the on-off valve 5 is removed from the branch pipe 2.

  By removing the installation device 20 described above, the fluid in the pipe presses the backup ring 13 in the outflow direction, that is, in the right direction in the drawing against the urging force of the spring body 17 by water pressure, so that the gasket 16 is connected to one end of the communication path R. Block the water tightly. By doing in this way, the distribution | circulation of the fluid can be completely interrupted | blocked before and behind the suppression body 10 by the communicating path R. FIG. By setting the biasing force of the spring body 17 to be smaller than the water pressure in the pipe, it is necessary to perform a special closing operation using the water pressure in the pipe simply by removing the installation device 20 and the on-off valve 5 as described above. The flow of fluid can be blocked before and after the deterrent body 10.

  As described above, the restraining body 10 is in the standby state of the engaged bolt 3b by the installation device 20 provided with the accommodating portion 22 that accommodates the restraining body 10 in a sealed manner and connected to the branch pipe 2 and connected to the on-off valve 5. , The engaged bolt 3b moves toward a predetermined location without being interfered with movement, and the engaged bolt 3b is switched to a protruding state after the deterrent body 10 has moved to the predetermined location. By engaging the engaging portion 11b of the engaging top 11 to the engaged bolt 3b and suppressing the flow of the fluid by the deterrent body 10 at a predetermined location of the branch pipe 2, the on-off valve 5 can be opened in an uninterrupted state. It can be easily removed.

  Further, in the standby state of the engaged bolt 3b by the installation device 20 provided with the accommodating portion 22 that accommodates the deterrent body 10 in a sealed manner and connected to the on-off valve 5 in communication with the branch pipe 2 in the attachment process, The restraining body 10 in which the O-ring 14 is in an unsealed state is moved toward a predetermined location without being interfered with movement by the engaged bolt 3b, and the engaged bolt 3b protrudes at the predetermined location in the engagement restraining step. The engaging portion 11b of the engaging top 11 constituting the restraining body 10 is engaged with the engaged bolt 3b, the O-ring 14 is hermetically sealed, the fluid flow is sealed, and the branch pipe 2 is predetermined. By restricting the flow of the fluid by the restraining body 10 at the location, the on-off valve 5 can be easily removed in a continuous flow state in the removal step.

  Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 5 is an enlarged cross-sectional view showing a moving process in the second embodiment. FIG. 6 is an enlarged cross-sectional view showing an engagement inhibiting step. FIG. 7 is an enlarged cross-sectional view showing the removal process. In addition, the same structure as the said Example is abbreviate | omitted.

  As shown in FIG. 5, the restraining body 40 according to the second embodiment includes an engagement top 41 including an engagement portion 41 b that is concave along the outer peripheral surface in order from the distal end side (the left side in the drawing), and serves as a sealing member. It is mainly composed of an elastic member 44 and an annular member 42, and an engaging top 41 is screwed, and a bolt 43 into which the elastic member 44 and the annular member 42 are inserted is screwed with a nut 45.

  In addition, the installation device 50 for installing the deterrent body 40 at a predetermined location has an insertion shaft 54 that is watertightly inserted at one end side into a housing (not shown) and fitted with a nut 45, and a cylindrical shape that inserts the insertion shaft 54 into the inside substantially coaxially. And a feed shaft 56 fitted to the annular member 42.

  The movement process will be described. The restraining body 40 is moved in the axial direction (left direction in the drawing) toward a predetermined position via the insertion shaft 54 and the feed shaft 56 by a handle (not shown). The fluid passes through the outer periphery of the engagement top 41 and circulates in the accommodating portion on the rear side of the deterring body 40. By doing in this way, the pressure difference by the fluid before and behind the suppression body 40 is eliminated, and the suppression body 40 is easy to move. A through hole may be formed in the peripheral wall of the feed shaft 56 so that the fluid flows through the feed shaft 56 through the through hole.

  In addition, it is preferable that the amount of movement in the axial direction can be grasped so that the restraining body 40 is correctly arranged at a predetermined location by marking the outer peripheral surface on the rear side of the feed shaft 56.

  Next, as shown in FIG. 6, the engagement restraining step will be described. The protrusion 3 c protrudes into the branch pipe 2 by screwing the engaged bolt 3 b into the branch pipe 2. By switching to the state, the engaging portion 41b is engaged with the engaged bolt 3b by bringing the tip 3c into contact with the engaging portion 41b of the engaging top 41 arranged at a predetermined location. By doing in this way, the movement of the engagement top 41 is also regulated in the removing step described later.

  On the other hand, by rotating the insertion shaft 54 and screwing the nut 45 into the bolt 43, the annular member 42 is pressed toward the engagement top 41, and the elastic member 44 is connected to the annular member 42 and the engagement top 41. Between the inner peripheral surface of the branch pipe 2 and the fluid flow between the inner peripheral surface and the engagement top 41 is sealed. Become.

  At this time, since the annular member 42 is fitted to the feed shaft 56 and the rotation operation is restricted, the elastic member 44 in contact with the annular member 42 is twisted in conjunction with the rotation operation of the nut 45. In other words, the elastic member 44 is sealed by being applied with a compressive force only in the axial direction.

  By the end of the engagement inhibiting step, the fluid flow is completely blocked at a predetermined location of the branch pipe 2.

  Next, the removal process will be described. As shown in FIG. 7, the installation device 50 is removed from the on-off valve in an unsteady flow state under the situation where the flow of the fluid is suppressed by the suppression body 40 as described above, The on-off valve is removed from the branch pipe 2. Alternatively, the on-off valve may be removed from the branch pipe 2 while the installation device 50 is attached to the on-off valve. Since the insertion shaft 54 and the feed shaft 56 are only fitted to the nut 45 and the annular member 42, respectively, by pulling the insertion shaft 54 and the feed shaft 56 back in the axial direction, respectively, from the nut 45 and the annular member 42, respectively. It comes off easily.

  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, as a predetermined portion of the existing fluid pipe, the engaged portion is provided at a predetermined portion of the branch pipe 2 branched from the main pipe 1 and the deterrence body 10 is installed. As long as it is a place which can comprise a pipe | tube and can install a suppression body, the predetermined | prescribed place in a main pipe | tube may be sufficient, for example.

  Moreover, in the said Example, although the branch pipe 2 branched substantially orthogonally to the main pipe 1 and the main pipe 1 through which the fluid distribute | circulates is shown as an existing fluid pipe, an existing fluid pipe is an existing pipe line, for example. It also includes a storage case that stores a valve that opens and closes, and the discharge portion may be a predetermined location in order to remove the open / close valve connected through the discharge portion communicating with the storage case.

It is the schematic which showed the attachment process of the on-off valve removal means in Example 1 of this invention. It is the schematic which showed the movement process. (A) is the expanded sectional view which showed the communicating path through which the fluid distribute | circulates before and after the suppression body, (b) is AA sectional drawing of (a). It is the expanded sectional view which showed the removal process. FIG. 6 is an enlarged cross-sectional view showing a moving process in Example 2. It is the expanded sectional view which showed the engagement suppression process. It is the expanded sectional view which showed the removal process.

Explanation of symbols

1 Main pipe (existing fluid pipe)
2 Branch pipe (existing fluid pipe)
2c Tapered surface 3b Engaged bolt (engaged part)
5 On-off valve 10 Suppressor 11 Engagement top 11b Engagement part 13 Backup ring 14 O-ring (sealing member)
15 Bolt 16 Gasket 17 Spring body 20 Installation device 22 Housing part 24 Insertion shaft 27 Handle 30 Release valve 32 Pressure gauge 40 Suppression body 41 Engagement top 41b Engagement part 42 Annular member 43 Bolt 44 Elastic member (sealing member)
45 Nut 50 Installation device 54 Insertion shaft

Claims (5)

An on-off valve removing means for removing the on-off valve connected to the existing fluid pipe in an uninterrupted state,
A front peripheral surface Ru provided with a sealing member annular sealing between the inner peripheral surface of the existing fluid tube, and a rear peripheral surface consisting of the circumferential surface of the small diameter than the front peripheral surface which is disposed at the back, the comprising, a suppression body boundary between the front peripheral face and the rear peripheral surface to inhibit flow of fluid comprising an engagement portion for movement restriction,
An installation device comprising a housing portion for housing the deterrent body in a sealed manner, and installing the deterrent body at a predetermined location from the housing portion via the on-off valve;
An engaged portion that can be moved to a standby state or a protruding state in which the protrusion is prevented from protruding toward the inside of the existing fluid pipe by an external operation ; and a step portion that abuts and restricts movement of the deterrence member in the insertion direction. The existing fluid pipe comprising :
Consists of
The relationship between the stepped portion, the restraining body, and the engaged portion is when the stepped portion and the restraining body are in contact with each other, and the protruding engaged portion is in contact with the rear peripheral surface. , When moving in a direction opposite to the insertion of the deterrent body, the engaged portion in the protruding state engages with the engaging portion ,
In the standby state of the engaged portion, the installation device moves the deterrence member from the storage unit toward the stepped part via the on-off valve, and brings the deterrence member into contact with the stepped part. The on-off valve removing means, wherein the engaged portion is moved to the protruding state in a state.   The on-off valve removing means according to claim 1, wherein a communication passage is formed in the restraining body so as to open and close the predetermined portion side and the accommodating portion side.   The on-off valve removing means according to claim 2, wherein the installation device includes an open valve capable of opening the housing portion.   The installation device is a sealed state of the sealing member that seals between an unsealed state of the sealing member that can move the deterrence member toward the predetermined location and an inner peripheral surface of an existing fluid pipe at the predetermined location. 4. The on-off valve removing means according to claim 1, wherein the on-off valve removing means is switchable.   The inner surface of the existing fluid pipe at the predetermined location is provided with a tapered surface that is reduced in diameter along the insertion direction of the deterrence body, and the sealing member is brought into contact with the tapered surface by the movement of the deterrence member. 5. The on-off valve removing means according to claim 4, wherein the sealing state is switched from the sealed state to the sealed state.

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