JP5722729B2 - Water pressure testing machine - Google Patents

Description

  The present invention provides a gap between both sides of the outer peripheral surface of the cylindrical main body that can be carried into the fluid pipe in the axial direction and the inner peripheral surface of the pipe that is displaced to both sides in the axial direction with respect to the joint portion of the fluid pipe. A pair of annular water-stopping bags that can be expanded to the water-stopping state are provided, and both the circular water-stopping bag that is diameter-expanded to the water-stopping state, the outer peripheral surface of the cylindrical body, and the inner peripheral surface of the fluid pipe The water pressure tester is provided with a water supply unit for supplying water for water pressure test in an annular sealed space formed by

As a hydraulic tester of this type, in the hydraulic tester disclosed in Patent Document 1, a pair of tube rings as a pair of annular water blocking bags are provided on both sides in the axial direction on the outer peripheral surface of the cylindrical body. The cylindrical main body is configured to be able to inject water into the pair of tube rings via an in-tube ring injection pipe that is disposed penetrating from the inner peripheral surface side toward the outer peripheral surface side. Thus, a pair of tube rings are used to stop water between the outer peripheral surface of the cylindrical body and the inner peripheral surface of the fluid pipe that is displaced to both sides in the axial direction with respect to the joint portion of the fluid pipe. The diameter can be increased.
An annular sealed space is formed by the pair of tube rings in an expanded state, the outer peripheral surface of the cylindrical main body, and the inner peripheral surface of the fluid pipe, and supplies water for water pressure test into the annular sealed space As an injection pipe and an exhaust pipe for discharging air from the annular sealed space, a cylindrical main body is disposed so as to penetrate from the inner peripheral surface side toward the outer peripheral surface side. Thereby, it is supposed that the water pressure test which detects the presence or absence of the water leak from the joint part of the fluid pipe located in the annular sealed space can be performed by the hydraulic pressure of the water filled in the annular sealed space.

Japanese Patent No. 3597455

  Here, in the hydraulic testing machine disclosed in Patent Document 1, the outer peripheral surface of the cylindrical main body has a cylindrical portion having a substantially constant outer diameter, a smaller diameter than the outer diameter of the cylindrical portion, and a shaft in the cylindrical main body. A pair of annular recesses are formed on both sides in the core direction. Each tube ring is packaged in each annular recess, and a flange portion continuous to the annular opening edge on the radially inner side of the tube ring is formed by a pressing plate and a mounting flange portion provided on the bottom surface in the annular recess. In a state of being sandwiched in the radial direction, it is fixed to the bottom of the annular recess by a screw.

  However, in such a hydraulic pressure tester, only the mounting recess is formed with a smaller diameter than the outer diameter of the cylindrical portion, and both ends in the axial direction from the mounting recess (a part of the cylindrical portion on the outer peripheral surface of the cylindrical body) ) Is formed to have a larger diameter than the mounting recess. For this reason, when mounting a new tube ring in the mounting recess of the cylindrical body due to aging or damage of the tube ring, the inner diameter of the new tube ring is larger than the outer diameter of the mounting recess. It is necessary to make the diameter larger than the outer diameter of the end of the cylindrical main body, and to move from the end to the mounting recess in this expanded diameter state. In such a case, it takes a lot of time to install a new tube ring, and when the tube ring is greatly expanded, the tube ring may be torn or cracked. There is a possibility that peeling or the like may occur at the joint location.

  Further, in such a hydraulic testing machine, it is necessary to provide a flange portion continuous to the annular opening edge on the radially inner side of the tube ring, to provide a mounting flange on the bottom surface of the mounting recess, and to provide a presser plate, etc. Since the structure for mounting and fixing the ring on the mounting recess is complicated, it takes much time to mount a new tube ring.

  Therefore, the labor and time for mounting and fixing the tube ring on the mounting recess are enormous, and there is a possibility that the construction period will be prolonged and the cost will be increased.

  The present invention has been made in view of the above-described circumstances, and its main problem is that it is simply and quickly and reliably exteriorly fixed to a bag mounting portion of a cylindrical main body while preventing damage to the annular water-stopping bag. In addition, the present invention is to provide a water pressure tester capable of making the outer and fixing structure of the annular water-stopping bag a simple structure.

Characteristic feature of the present invention, in the axial direction on both sides of the outer peripheral surface of the cylindrical body can be carried in a fluid pipe, pipe peripheral surface displaced on both sides of the axial direction with respect to the joint portion of the fluid pipe and A pair of annular water-stopping bags that can be expanded to a state in which water is stopped between each of the two water-stopping bags, the outer peripheral surface of the cylindrical main body, A water pressure tester provided with a water supply unit for supplying water for water pressure test in an annular sealed space formed by the pipe inner peripheral surface of the fluid pipe,
On the central side in the axial direction of both bag mounting portions on the outer peripheral surface of the cylindrical main body, there are main body side flanges that define the maximum insertion position in the axial direction of the annular water-stopping bag that is sheathed from the end side. An annular movement blocking body that protrudes from the outer diameter side and that prevents the movement of the annular water-stopping bag that is externally mounted on both bag mounting parts to the end part side of the bag mounting part is attached and detached. It is fixed by the fixing means in the fitted state and is fixed by the fixing means along the pipe radial direction ,
In a portion facing the annular water blocking bag in the annular movement blocking body in the axial center direction, a blocking body side collar protruding to the outer diameter side is formed, and both bag mounting portions on the outer peripheral surface of the cylindrical body are, A mounting concave portion of the annular water-stopping bag defined by the main body side collar and the blocking body side collar is formed, and on the end side boundary portion of the both bag mounting sites on the outer peripheral surface of the cylindrical main body, A stepped portion is formed which is larger in diameter than the inner diameter of the blocking body side flange of the annular movement blocking body, and the blocking body side flange contacts the axial center direction to define the maximum insertion position of the annular movement blocking body. In the point.

  According to the above configuration, in the configuration in which the pair of annular water-stopping bags are respectively sheathed from the end portions on the bag mounting portions on both sides in the axial direction of the outer peripheral surface of the cylindrical body, the axial direction of both bag mounting portions On the center side, body side flanges that define the maximum insertion position in the axial center direction of the annular water blocking bag are formed to protrude to the outer diameter side. Therefore, on the outer peripheral surface of the cylindrical main body, the main body side collar portion is formed so as to protrude greatly toward the outer diameter side, while the end side of the main body side collar portion in the axial direction (from the bag mounting portion and the bag mounting portion). Further, the outer diameter of the end portion side) can be formed to an outer diameter that can be exteriorized without substantially expanding the diameter of the annular water blocking bag. In other words, even if the inner diameter of the annular water-stopping bag is formed to be approximately the same diameter or slightly larger than the outer diameter of both bag mounting portions, the cylindrical main body in the axial direction without substantially expanding the diameter of the annular water-stopping bag It is possible to easily, quickly and surely carry out exterior packaging from the end portion of the bag to both bag mounting portions that are in contact with the body side collar. Then, as the annular water-stopping bag is exteriorized from the end of the cylindrical main body to the bag attachment site, the annular water-stopping bag abuts against the main body side flange in the axial direction, and is the maximum at the desired attachment position. It is surely positioned at the insertion position.

Also, following the exterior of the annular water blocking bag, the annular movement blocking bodies are fitted and mounted from both ends of the cylindrical body, and the annular water stopping bag that is externally mounted on both bag mounting parts moves to the end side. In this state, the annular movement blocking body is fixed to the end side of the bag mounting portion by the fixing means, so that the inner diameter of the annular water-stopping bag is approximately the same as or slightly the same as the outer diameter of both bag mounting portions. The outer diameter of the cylindrical body on the end side from the flange on the main body side is formed to be substantially the same as or slightly smaller than the inner diameter of the annular water-stopping bag. Even when there is a possibility of moving to the end side, the annular water blocking bag can be fixed in a state where movement to the end side of the cylindrical main body is blocked, Can be prevented from leaving. In other words, the annular water-stopping bag can be held between the main body side collar portion that is the bag mounting portion in the axial direction and the annular movement blocking body. In addition, a pair of main body side flanges are formed on the outer diameter side at the center side in the axial direction of both bag mounting parts, and the outer periphery of the cylindrical main body is at the end part side of both bag mounting parts. Since the pair of blocking body side flanges in the pair of annular movement blocking bodies fitted and mounted on the surface are formed to protrude to the outer diameter side, the body side flange and the blocking body side flange are formed on both bag mounting portions. A mounting recess for the annular water blocking bag to be partitioned is formed. For this reason, the annular water-stopping bag externally mounted in the mounting recess is prevented from moving toward the center in the axial direction by contact with the main body side flange, and the movement toward the end is prevented from contacting the blocking body side flange. The annular water blocking bag can be fixed by the fixing means in a state in which the annular water blocking bag is reliably prevented from being detached from the mounting recess. Furthermore, since a step having a larger diameter than the inner diameter of the blocking body side flange of the annular movement blocking body is formed at the end side boundary portion of both bag mounting portions on the outer peripheral surface of the cylindrical body, the cylindrical body After the annular water blocking bag is sheathed from the end of the outer wall and allowed to pass through the stepped portion, as the annular movement blocking body is externally fitted, the blocking body side flange of the annular movement blocking body is pivoted to the stepped portion. The maximum insertion position of the annular movement blocking body in the axial direction is defined, and the end side boundary portion of the bag mounting portion of the annular waterproof bag in the axial direction is defined. Thereby, positioning of the annular movement blocking body and positioning of the annular water blocking bag in the axial direction can be reliably performed.

  Therefore, it is not necessary to expand the diameter of the annular water-stopping bag when fixing the annular water-stopping bag to the cylindrical main body. Can be easily, quickly and reliably packaged, and in this exterior state, the annular water-stopping bag can be simply, quickly and reliably fixed to the end of the cylindrical main body by the fixing means, and the annular water-stopping bag exterior And a fixed structure can be made into a simple structure.

Characteristic feature of the present invention is pre-Symbol smaller or equally set than the outer diameter of the outer diameter of the body-side flange portion and the blocking side flange portion of the reduced diameter state of said annular water stopping bag attached to the mounting recess There is in point.

According to the above configuration, the outer diameter of the reduced diameter state of the mounted annular water stop bag instrumentation Chaku凹部is because they are smaller or equally set than the outer diameter of the body-side flange portion and the blocking body side flange portion, The outer diameter portion (the outer diameter side tip portion) of the annular water blocking bag in the reduced diameter state does not protrude from the outer diameter side portions of the main body side collar portion and the blocking body side collar portion, and is securely accommodated in the mounting recess. It becomes the state. Accordingly, even if the cylindrical main body having the annular water stop bag mounted in the mounting recess is carried into the fluid pipe and moved in the pipe axial direction or the pipe circumferential direction in the fluid pipe, the annular body in a reduced diameter state is provided. The water stop bag does not contact the inner peripheral surface of the fluid pipe, and damage to the annular water stop bag can be prevented.

A characteristic configuration of the present invention is that a traveling mechanism having wheels at both ends that enable the cylindrical body to travel along the axial direction of the fluid pipe extends from both ends of the cylindrical body. A radial positioning mechanism that is disposed on the inner diameter side portion of the cylindrical main body and is capable of moving the traveling mechanism relative to the cylindrical main body in the tube radial direction in the state where the traveling mechanism and the cylindrical shape are disposed. The travel mechanism is provided with a relative movement in the tube radial direction of the travel mechanism by the radial positioning mechanism, the end surfaces of both ends of the cylindrical main body and the both annular movement blocking bodies. A pair of guide portions for guiding along the end surface of the end portion is disposed on the center side of the wheel.

According to the above feature, the traveling mechanism disposed on the inner diameter side portion of the cylindrical main body with the wheels extending from both ends of the cylindrical main body is disposed across the traveling mechanism and the cylindrical main body. By moving relative to the cylindrical main body in the pipe radial direction by the provided radial positioning mechanism, only the two wheels extending from both ends of the cylindrical main body carried into the fluid pipe are placed in the pipe of the fluid pipe. The cylindrical main body and the traveling mechanism can be positioned in the radial direction so that the traveling mechanism excluding the cylindrical main body and the wheels does not contact the inner peripheral surface of the cylindrical body.
In particular, the traveling mechanism includes a pair for guiding relative movement of the traveling mechanism in the tube radial direction by the radial positioning mechanism along the end surfaces of both ends of the cylindrical body and the end surfaces of both annular movement blocking bodies. Since the guide portion is disposed, a traveling mechanism formed longer than the length of the cylindrical main body in the axial direction and provided with wheels at both ends extends the wheels from both ends of the cylindrical main body. In the case of relative movement in the tube diameter direction in the state, the travel mechanism is pipe-diametered by a pair of guide portions at two locations extending from both ends of the cylindrical body in the axial direction and positioned on the center side of the wheels of the travel mechanism. It is possible to guide in a direction along both end faces which are directions. Accordingly, the longitudinal direction of the traveling mechanism is maintained in a state substantially parallel to the axial direction to prevent tilting, and both wheels disposed in the traveling mechanism are brought into contact with the inner peripheral surface of the fluid pipe. Is possible. In addition, since the pair of guide portions are disposed closer to the center side than the wheels in the axial direction, the pair of guide portions does not come into contact with the wheels or the like with the relative movement of the traveling mechanism.

A characteristic configuration of the present invention is that the traveling mechanism includes an inner peripheral surface of a pipe located on both sides of the gap when the wheel passes through a gap opened inward in the pipe radial direction at the joint portion of the fluid pipe. There is a drop-off prevention member that comes into contact with at least one of the wheels and prevents the wheel from dropping into the gap.

  According to the above feature, when the wheel of the traveling mechanism in the cylindrical main body carried into the fluid pipe passes through the gap in the joint portion of the fluid pipe in which the gap opening to the inner side in the pipe radial direction is formed. Even if there is a possibility that the wheel may fall off, the drop-off prevention member equipped in the travel mechanism abuts at least one of the pipe inner peripheral surfaces located on both sides of the gap to prevent the wheel from falling into the gap. can do. For example, when a drop-off prevention member is provided in the central portion in the axial direction with respect to the location where the wheel is provided in the travel mechanism, the cylindrical main body is carried into the fluid pipe and advances deeper along the pipe axial direction. Even if the wheel is likely to drop into the gap, the drop-off prevention member comes into contact with the inner peripheral surface of the pipe located on the rear side of the gap, and the wheel is located on the front side of the gap in the contact state. As a result, the pair of annular water blocking bags are displaced to both sides in the axial direction with respect to the joint portion of the fluid pipe in a state where the wheel and the drop-off preventing member do not fall into the gap. Can be placed in position.

A characteristic configuration of the present invention is that the traveling mechanism and the radial positioning mechanism are each perpendicular to the axial center of the cylindrical main body in a lower half side portion of the inner diameter side portion of the cylindrical main body as viewed in the axial direction. A pair is provided at a position which is symmetrical with respect to.

According to the above feature, the configuration in which the traveling mechanism and the radial positioning mechanism that relatively moves the traveling mechanism in the radial direction with respect to the cylindrical main body are combined in the lower half side portion in the inner diameter side portion of the cylindrical main body, Since a pair is arranged at positions symmetrical with respect to the perpendicular passing through the axis of the cylindrical main body, when the cylindrical main body is carried into the fluid pipe, the two-direction positioning mechanism is appropriately adjusted to Each wheel of the traveling mechanism arranged symmetrically with respect to the vertical line can be properly brought into contact with the inner peripheral surface of the fluid pipe, and the inner diameter of the fluid pipe and the inner diameter of the cylindrical body are slightly different. Even when the axes of the two are different in different configurations, the fluid pipe and the cylindrical body can be moved relative to the cylindrical body by appropriately adjusting both radial positioning mechanisms. Abbreviate both axis cores It is possible to Itasa.
Accordingly, the annular water blocking bag is expanded to increase the diameter of the fluid pipe in a state where the wheel is securely in contact with the inner peripheral surface of the fluid pipe and the axial centers of the cylindrical main body and the fluid pipe are substantially matched. It is possible to contact the inner peripheral surface of the pipe evenly in the circumferential direction and to reliably stop water.

In the characteristic configuration of the present invention , a mounting member for an operating rod capable of running the cylindrical main body carried into the fluid pipe along the axial direction is disposed at a lower portion of the end of the cylindrical main body. There is in point.

  According to the above feature, since the mounting member for the operation rod capable of running the cylindrical body carried in the fluid pipe along the tube axis direction is disposed at the lower part of the end of the cylindrical body. An operating force in the same direction as the axial direction can be applied to the vicinity of the pair of traveling mechanisms disposed in the lower half of the cylindrical main body via the operating portion and the mounting member. Can be efficiently driven with a small operating force along the tube axis direction.

Characteristic feature of the present invention, the sectional shape of the annular water-stop bag, the contracted state, the inner diameter portion is formed in a linear shape, bulging end portions and the central portion of the outer diameter portion axial direction on the outer diameter side In the expanded state in which the portion between the both ends and the central portion is formed in a substantially corrugated shape that is recessed toward the inner diameter side, and the fluid is injected into the inside, the outer diameter portion includes both the end portions and the central portion in the axial direction, and A portion between the both end portions and the central portion is formed in a substantially arc shape bulging to the outer diameter side than the outer diameter in the reduced diameter state.

According to the above feature, when the cross-sectional shape of the annular water blocking bag is in a reduced diameter state, the inner diameter portion is formed in a straight line parallel to the axial direction of the cylindrical body. By forming it slightly larger or the same diameter as the outer diameter of the mounting recess at the bag mounting site on the outer peripheral surface of the main body, it is easy and reliable from the end of the cylindrical main body without substantially expanding the diameter of the annular water blocking bag. Can be externally mounted on the mounting recess.
Also, when the cross-sectional shape of the annular water blocking bag is in a reduced diameter state, the outer diameter portion is bulged to the outer diameter side at both ends and the central portion in the axial direction, and the portion between both ends and the central portion is the inner diameter side In the expanded diameter state where the fluid is injected into the inside and the fluid is injected into the inside, the outer diameter portion is in the axial direction at both ends and the center portion, and the portion between the both ends and the center portion is in a reduced diameter state. It is formed in a substantially arc shape that bulges to the outer diameter side of the outer diameter. That is, when the cross-sectional shape of the annular water-stopping bag shifts from the reduced diameter state to the expanded diameter state, the tubular inner peripheral surface of the fluid pipe bulges to a substantially arc shape on the outer diameter side in the radial direction of the cylindrical body. On the other hand, it is comprised so that a diameter may be hardly expanded to the both-ends side of the axial center direction of an annular water stop bag. Therefore, the annular water blocking bag has a directivity that efficiently bulges mainly on the outer diameter side in the radial direction as the diameter of the bag increases.

II view of FIG. 2 which shows the water pressure tester located in the joint part in a water pipe Schematic rear view of water pressure testing machine Schematic perspective view of water pressure tester IV-IV sectional view of the water pressure tester in FIG. Schematic cross-sectional view showing the main parts of the water pressure tester Explanatory drawing showing the state in which the water pressure tester runs in the water pipe Enlarged sectional view showing the vicinity of the wheels of the travel mechanism Explanatory drawing which shows schematic structure of radial direction positioning mechanism Schematic cross-sectional view showing a state where the diameter of the annular water stop bag has been increased Sectional drawing which shows schematic structure of an annular water stop bag Explanatory drawing which shows the state which supplied the water for water pressure tests in annular sealed space Explanatory drawing which shows the fixing means which concerns on another embodiment Explanatory drawing which shows the fixing means which concerns on another embodiment Explanatory drawing which shows the drop-off prevention means which concerns on another embodiment

  As shown in FIG. 1, a joint B of a fluid pipe such as a cast iron pipe targeted by the water pressure tester A according to the present invention is, for example, an inlet pipe part of a water pipe P <b> 1 (an example of a fluid pipe). 1 is a joint portion B that connects 1 and a receiving pipe portion 2 of another water pipe P2 (an example of a fluid pipe) that is fitted and connected thereto. The joint B can be sealed between the pipe outer peripheral surface of the insertion tube portion 1 and the pipe inner peripheral surface 2a of the receiving pipe portion 2, and the diameter of the pipe inner peripheral surface 2a is increased outward in the pipe radial direction. The elastic sealing material 4 made of an annular synthetic rubber, which is mounted in the annular elastic sealing material mounting groove 3, and the insertion tube portion 1 and the receiving tube portion 2 are relatively separated along the tube axis X direction. A connecting means 5 is provided which, when moved, abuts each other in the direction of the tube axis X to prevent further disengagement movement.

  To constitute the connecting means 5, the annular mounting groove 5a formed on the pipe inner peripheral surface 2a of the receiving pipe portion 2 is elastic on the diameter-expanded side formed in a substantially C shape when viewed from the tube axis X direction. A deformable metal locking member 5b and an elastic holding ring 5c that holds the locking member 5b coaxially with the receiving tube portion 2 in a state in which the diameter-expanding deformation of the metal locking member 5b is allowed. When the insertion tube portion 1 and the receiving tube portion 2 move relative to each other more than a predetermined amount due to an earthquake or uneven settlement, the tip of the tube outer peripheral surface of the mouth tube portion 1 is attached to the locking member 5b. On the other hand, an annular retaining protrusion 5d is integrally formed so as to be brought into contact with the tube axis X direction and prevent further disengagement movement of the insertion tube portion 1 and the receiving tube portion 2 beyond that.

The pipe inner peripheral surface 2a excluding the pipe inner peripheral surface 1a of the water pipe P1 and the receiving pipe portion 2 of the water pipe P2 are formed to have substantially the same inner diameter, and the water pipe P1 is inserted in the direction along the pipe axis X direction. Between the pipe inner peripheral surface 1a at the distal end of the mouth pipe portion 1 and the pipe inner peripheral surface 2a at the base end portion of the receiving pipe portion 2 that expands outward in the pipe radial direction of the pipe inner peripheral surface 2a of the water pipe P2. Is formed with a gap S that opens to the inner side in the tube diameter direction. Via the gap S, the inside of the water pipe P1 and the water pipe P2 and the elastic sealing material mounting groove 3 on which the elastic sealing material 4 is mounted are communicated.
In addition, although it does not necessarily limit, in this embodiment, both water pipes P1 and P2 are formed in the internal diameter of about 400-800 mm, a worker enters in both the water pipes P1 and P2, and an insertion pipe part In this configuration, it is difficult to perform a watertight test of the elastic sealing material 4 disposed in the joint portion B between 1 and the receiving pipe portion 2.

Next, the hydraulic pressure testing machine A according to the present invention will be described with reference to FIGS.
As shown in FIGS. 1, 4, and 11, the water pressure tester A includes a water pipe P1 on both sides of the outer peripheral surface 11 of the cylindrical main body 10 that can be carried into the water pipes P1 and P2 in the axial Y direction. A pair of annular water-stopping operations capable of expanding the diameter to a state in which water is stopped between the pipe inner peripheral surfaces 1a and 2a displaced to both sides in the axis Y direction with respect to the clearance S of the joint portion B of P2. Annulus formed by the annular water-stopping bag 20 which is provided with the bag 20 and whose diameter is expanded to the water-stopping state, the outer peripheral surface 11 of the cylindrical body 10 and the pipe inner peripheral surfaces 1a and 2a of the water pipes P1 and P2. A water supply unit 30 for supplying water W for water pressure test is provided in the sealed space V. Although details will be described later, by using the water pressure tester A, the water W from the water supply unit 30 is supplied and filled into the annular sealed space V communicating with the elastic sealing material 4 through the gap S. , It is possible to inspect water leakage from the vicinity of the elastic sealing material 4 that realizes the watertight state of the joint portion B of the water pipes P1, P2.

Hereinafter, the configuration of each part of the hydraulic pressure tester A will be described.
As shown in FIGS. 1 and 2, the hydraulic pressure testing machine A includes a hollow cylindrical main body 10 made of metal (in this embodiment, made of aluminum), and the outer diameter of the cylindrical main body 10 is water pipes P1, P2. It is formed to be slightly smaller in diameter than the inner diameters of the water pipes P1 and P2 so as to be able to be carried in.
As shown in FIGS. 1 and 5, the outer peripheral surface 11 of the cylindrical main body 10 is provided with a pair of bag mounting portions 11a capable of mounting a pair of annular water-stopping bags 20 on both sides in the axial center Y direction. On the center side in the axis Y direction of the bag mounting portion 11a, the main body side flanges 11b that define the maximum insertion position in the axis Y direction of the annular water-stopping bag 20 that is sheathed from the end side are formed to protrude to the outer diameter side. In addition, the end side boundary portion of both bag mounting portions 11a has a diameter larger than the inner diameter of the blocking body side flange 12A of the annular movement blocking body 12 to be described later, and the blocking body side flange 12A contacts the axial center Y direction. A step portion 11c that defines the maximum insertion position of the annular movement blocking body 12 in contact therewith is formed, and a blocking body fit capable of externally fitting the annular movement blocking body 12 at the end in the axial center Y direction than the step portion 11c. 11d is formed, and further on the main body side The further axial Y direction center side of the part 11b mounting portion 11e of the water injection pipe 31 of the water supply part 30 is formed.

  Therefore, on the outer peripheral surface 11 of the cylindrical main body 10, the diameter of the blocking body fitting portion 11 d is increased in order from the both end portions of the cylindrical main body 10, and the diameter of the stepped portion 11 c is larger than that of the blocking body fitting portion 11 d. A bag mounting part 11a, a main body side collar 11b having a diameter larger than that of the bag mounting part 11a, and a mounting part 11e having a diameter smaller than that of the main body side collar 11b and a diameter larger than that of the bag mounting part 11a are formed. It becomes. A plurality of insertion holes 11f through which bolts 13 (an example of fixing means) for fixing the annular movement prevention body 12 in an externally fitted state (an example of a fitted state) so as to be removable can be inserted into the blocking body fitting portion 11d. (Six in this embodiment) are formed so as to penetrate from the inner diameter side to the outer diameter side.

  As shown in FIGS. 1 and 3 to 5, a metal (in this embodiment, made of aluminum) is provided with a hollow annular movement prevention body 12 that is hollow, and the annular movement prevention body 12 includes a cylindrical main body 10. The outer diameter of the outer peripheral surface of the cylindrical main body 10 from the opposite end portions of the cylindrical body 10 is such that the outer diameter of the annular water-stopping bag 20 is opposed to the annular water-stopping bag 20 in the axial Y direction. A blocking body side flange 12A protruding to the side is formed. Further, the outer diameter of the blocking member side flange 12A of the annular movement blocking body 12 is formed to be slightly smaller than the inner diameter of the water pipes P1 and P2 so as to be able to be carried into the water pipes P1 and P2, and the inner diameter is the cylindrical main body 10. The outer diameter of the outer peripheral surface 11 is smaller than the outer diameter of the step portion 11c and is formed to have the same diameter as the outer diameter of the blocking member fitting portion 11d. Then, as the annular movement blocking body 12 is externally fitted to the blocking body fitting portion 11d, the stepped portion 11c formed larger in diameter than the inner diameter of the blocking body side flange 12A of the annular movement blocking body 12 is blocked. The body side collar 12A abuts from the direction of the axis Y to define the maximum insertion position of the annular movement blocking body 12, and a plurality of insertion holes 12a formed through the annular movement blocking body 12 from the inner diameter side to the outer diameter side. (Six in this embodiment) are aligned at positions that match the plurality of insertion holes 11f of the blocking body fitting portion 11d. Accordingly, the annular movement blocking body 12 can be reliably fixed to the predetermined blocking body fitting portion 11d in the cylindrical main body 10 by the bolt 13 and the nut 14. At this time, the end surfaces of the end portions of both annular movement blocking bodies 12 and the end surfaces of both end portions of the cylindrical main body 10 are surely positioned so as to be flush with each other in the direction along the tube radial direction. In addition, as the cyclic | annular movement prevention body 12, you may comprise with the annular member of one member in the circumferential direction, and you may comprise with a some division | segmentation member in the circumferential direction.

  As shown in FIGS. 9 and 10, the annular water blocking bag 20 has a cross-sectional shape in a reduced diameter state, the inner diameter portion 22 is formed linearly, and the outer diameter portion 23 has both end portions 23 a in the axis Y direction and The central portion 23b bulges to the outer diameter side, and a portion 23c between both end portions 23a and the central portion 23b is formed into a substantially waveform that is recessed toward the inner diameter side (see FIG. 10A). That is, the inner diameter portion 22 of the annular water blocking bag 20 in the reduced diameter state is formed to have a diameter substantially equal to or slightly larger than the outer diameter of both bag mounting portions 11a on the outer peripheral surface 11 of the cylindrical body 10. The outer diameter of the portion 23 is set smaller than or equal to the outer diameters of the main body side flange portion 11b and the blocking body side flange portion 12A in a state where the outer diameter of the portion 23 is mounted in the mounting recess 19 described later. On the other hand, the annular water blocking bag 20 has a cross-sectional shape in which the inner diameter portion 22 is formed linearly and the outer diameter portion 23 is in the direction of the axis Y in the expanded diameter state in which compressed air (an example of fluid) is injected. Both end portions 23a and the central portion 23b, and a portion 23c between the both end portions 23a and the central portion 23b are formed in a substantially arc shape that bulges to the outer diameter side with respect to the outer diameter in the reduced diameter state (FIG. 10 ( b)).

  The annular water-stopping bag 20 is made of rubber made of EPDM (ethylene-propylene-diene rubber), and has a fibrous or mesh-shaped core material in the vicinity of an intermediate position of the rubber thickness in a cross-sectional view. 24 is a state in which only the inner diameter portion 22 is doubled, and is disposed over the entire circumference, and the rubber thickness of the inner diameter portion 22 and the rubber thickness t1 of the central portion 23b in the reduced diameter state are the other portions. It is formed to be thicker than the thickness (for example, the thickness t2 of both end portions 23a and the portion 23c). Thus, when the cross-sectional shape of the annular water blocking bag 20 shifts from the reduced diameter state to the expanded diameter state, the annular water blocking bag 20 bulges out to a substantially arc shape on the outer diameter side in the radial direction of the cylindrical main body 10, and the water pipe P1. , P2 is configured so as to be in contact with the inner peripheral surfaces 1a, 2a of the pipes and stop the water, and on the other hand, it is configured so that the diameter of both ends 25 in the axial core Y direction of the annular water-stopping bag 20 hardly expands. . Therefore, the annular water blocking bag 20 has a directivity that efficiently bulges mainly on the outer diameter side in the radial direction as the diameter of the bag increases. An injection fitting 21 for injecting compressed air from the in-bag injection pipe 33 into the annular water stop bag 20 is attached to the inner diameter portion 22 of the annular water stop bag 20.

Here, first, a procedure for attaching and fixing the annular water stop bag 20 and the annular movement blocking body 12 to the cylindrical main body 10 will be described.
As shown in FIG. 5, the blocking member fitting portion 11 d and the step are formed from the both ends of the outer peripheral surface 11 of the cylindrical main body 10 along the axis Y direction to the center side without substantially expanding the diameter of the annular water blocking bag 20. The exterior is carried out until it passes through the part 11c and contacts the bag mounting part 11a with the main body side collar part 11b. At this time, the annular water-stopping bag 21 is inserted so that the injection fitting 21 attached to the inner diameter portion 22 of the annular water-stopping bag 20 is inserted into the bag attachment opening 18 (see FIG. 4) formed in the bag attachment portion 11a. 20 is mounted on the bag mounting portion 11a.

Subsequently, the annular movement blocking body 12 is connected to the blocking body fitting portion 11d from the both ends of the outer peripheral surface 11 of the cylindrical main body 10 along the axis Y direction, and the inner diameter side of the blocking body side flange 12A is the stepped portion 11c. Fit until it touches.
Then, the bolt 13 is inserted through the insertion hole 11 f of the blocking member fitting portion 11 d in the aligned state and the insertion hole 12 a of the annular movement blocking body 12, and is fastened and fixed by the nut 14. In addition, the attachment member 15 of the operation rod 40 described later is fastened and fixed together with the annular movement blocking body 12 and the blocking body fitting portion 11d by a bolt 13 attached to the lowermost portion at the end of the cylindrical main body 10.

As a result, even if the inner diameter of the annular water blocking bag 20 is formed to be substantially the same diameter or slightly larger than the outer diameter of both bag mounting portions 11a, From the end of the cylindrical main body 10 in the direction to the both bag mounting portions 11a that abut on the main body side flange 11b, it can be easily, quickly and surely covered. Then, as the annular water-stopping bag 20 is exteriorized from the end of the cylindrical main body 10 to the bag mounting part 11a, the annular water-stopping bag 20 comes into contact with the main body side flange 11b in the axis Y direction, and is desired. Thus, it is surely positioned at the maximum insertion position, which is the mounting position.
Moreover, the mounting recessed part 19 of the annular water stop bag 20 divided by the main body side collar part 11b and the blocking body side collar part 12A is formed in both bag mounting parts 11a. For this reason, the annular water blocking bag 20 sheathed in the mounting recess 19 is prevented from moving toward the center in the direction of the axis Y by contact with the main body side flange 11b, and is not allowed to move toward the end side. The annular water blocking bag 20 can be fixed by the bolt 13 and the nut 14 in a state where the annular water blocking bag 20 is reliably prevented from being detached from the mounting recess 19.
Furthermore, since the outer diameter in the reduced diameter state of the annular water blocking bag 20 mounted in the mounting recess 19 is set to be smaller than or equal to the outer diameter of the main body side flange portion 11b and the blocking body side flange portion 12A. The outer diameter part (outer diameter side tip part) of the annular water blocking bag 20 in the diameter state does not protrude from the outer diameter side parts of the main body side collar part 11b and the blocking body side collar part 12A, and is securely in the mounting recess 19. It will be in the state accommodated in. Thereby, even if the cylindrical main body 10 in which the annular water blocking bag 20 is mounted in the mounting recess 19 is carried into the water pipes P1 and P2 and moved in the pipe axis X direction or the pipe circumferential direction, the diameter is reduced. The annular water-stopping bag 20 in the state does not come into contact with the pipe inner peripheral surfaces 1a and 2a of the water pipes P1 and P2, and damage to the annular water-stopping bag 20 can be prevented.

The configuration of each part of the hydraulic pressure tester A will be further described.
As shown in FIGS. 1, 2, and 4, the cylindrical body 10 carried into the water pipes P <b> 1 and P <b> 2 can be traveled along the tube axis X direction at the lower part of the end portion of the cylindrical body 10. A mounting member 15 for the operation rod 40 is provided. In the present embodiment, as shown in FIG. 4, the attachment member 15 is configured by a substantially L-shaped bracket, and a male thread portion 40 a provided on the outer periphery of the distal end portion of the operation rod 40 can be screwed into one surface of the bracket. Through which the operating rod 40 can be attached and removed in the direction along the axis Y, and the bolt 13 for fixing the annular movement blocking body 12 to the other surface of the bracket can be inserted. 15b. And the attachment member 15 is arrange | positioned in the lower part of the cylindrical main body 10 on the perpendicular | vertical line containing the axial center Y of the cylindrical main body 10 seeing in the axial center Y direction, and the other surface of the bracket in which the penetration hole 15b is penetrated is formed. In a state where it abuts against the inner peripheral surface of the cylindrical main body 10, it is fixed together with the annular movement blocking body 12 by bolts 13 and nuts 14. In addition, as the operation rod 40, a configuration in which a plurality of operation rods are appropriately connected as long as the operation can be performed from the opening end of the water pipe P <b> 1 or the water pipe P <b> 2 to the joint B. An appropriate configuration such as a configuration with a single operating rod or an operating rod with a telescopic structure can be employed.

  As shown in FIGS. 1, 4, and 9, the attachment portion 11 e of the cylindrical main body 10 is formed with a water injection pipe opening 16 that penetrates from the inner diameter side to the outer diameter side and opens downward. A water injection pipe 31 is connected to the inner diameter side of the opening 16 in a watertight manner, and an exhaust pipe opening 17 penetrating from the inner diameter side to the outer diameter side and opening upward is formed. An exhaust pipe 32 is formed on the inner diameter side of the exhaust pipe opening 17. Are airtightly connected. Accordingly, water W for water pressure test from the water supply unit 30 is supplied into the annular sealed space V through the water injection pipe 31 and the water injection pipe opening 16, and the air Q (in some cases, present in the annular sealed space V) The water W) can be exhausted to the outside through the exhaust pipe opening 17 and the exhaust pipe 32. Note that the water injection pipe opening 16 and the exhaust pipe opening 17 are arranged at positions (upper and lower parts in the circumferential direction) facing each other on the vertical line including the axis Y of the cylindrical body 10.

  In both bag mounting portions 11 a of the cylindrical body 10, bag attachment openings 18 that penetrate from the inner diameter side to the outer diameter side and open downward are formed, and injection fittings inserted through the bag attachment openings 18. In-bag injection tube 33 is connected to 21 in an airtight manner. Therefore, compressed air (not shown) from a compressed air supply unit (not shown) is supplied into the annular water-stopping bag 20 through the bag injection pipe 33, the injection fitting 21 and the bag attachment opening 18, The annular water blocking bag 20 may be expanded from the reduced diameter state to the expanded diameter state, or compressed air may be sucked from the annular water stopping bag 20 and the diameter reduced operation from the expanded diameter state to the reduced diameter state. It is configured to be possible.

As shown in FIGS. 1 to 3, 6, and 7, the traveling mechanism C that allows the cylindrical main body 10 to travel along the direction of the tube axis X in the water pipes P <b> 1 and P <b> 2 is viewed in the direction of the axis Y. A pair of the cylindrical main body 10 is disposed at positions that are symmetrical with respect to a perpendicular passing through the axis Y in the lower half side portion of the inner diameter side portion (see FIG. 2).
The travel mechanism C is disposed in a suspended state on a metal (for example, aluminum) plate-like main body 50 made of a long member that is long in the axis Y direction, and on both ends 50A of the plate-like main body 50. A pair of wheels 51 that can travel along the direction of the pipe axis X in the water pipes P1 and P2, and both ends 50A of the plate-like main body 50 are arranged in a suspended state at the center side in the axis Y direction from the wheels 51. And a pair of dropout prevention members 52.
The wheel 51 and the drop-off prevention member 52 are fixed by bolts 53 and nuts 54 in a state of extending from both ends of the cylindrical main body 10.
The drop-off prevention member 52 is made of resin, and a plate-like flange portion formed on the upper side is fixed to the plate-like main body 50 by bolts 53 and nuts 54, and once the diameter is reduced below the plate-like flange portion. It is formed in a generally trapezoidal shape that becomes wider as it goes downward. Thereby, a space is secured between the plate-like flange portion and the substantially trapezoidal portion so that the bolt 53 and the nut 54 can be screwed together. Moreover, the lower end surface 52a of the substantially trapezoidal portion of the drop-off preventing member 52 is formed in parallel with the pipe inner peripheral surfaces 1a, 2a of the water pipes P1, P2, and the lower end surface 52a is located slightly above the lower end of the wheel 51. When the wheel 51 passes through the gap S that opens to the inner side in the pipe radial direction at the joint portion B of the water pipes P1 and P2, the front side S1 and the rear side S2 of the gap S The wheel 51 is configured to be prevented from dropping into the gap S by contacting at least one of the pipe inner peripheral surfaces 1a and 2a.
Further, the traveling mechanism C is configured such that the radial movement of the traveling mechanism C in the tube radial direction by the radial positioning mechanism D is performed in a cylindrical shape on both ends 50A of the plate-like main body 50 on the center side of the wheels 51 and the drop-off preventing member 52. A pair of guide portions that guide along the end faces 10 a at both ends of the main body 10 and the end faces 12 b at the ends of both annular movement blocking bodies 12 hang downward from the lower surface of the plate-like main body 50, which is radially outward. It is formed as a hanging part 55 (see FIG. 8).

  As shown in FIGS. 1, 2, and 8, a pair of radial positioning mechanisms D that allow the traveling mechanism C to move relative to the cylindrical body 10 in the tube radial direction are viewed in the axial Y direction. A pair of mechanisms C and the cylindrical main body 10 are disposed at positions that are symmetric with respect to a perpendicular passing through the axis Y at the inner diameter side portion (the inner peripheral surface side of the attachment portion 11e) of the cylindrical main body 10. (See FIG. 2).

  The radial positioning mechanism D is a rectangular tube portion 60a having a distal end formed in a rectangular tube shape, and a proximal end is screwed into a female screw portion 56 formed in the central portion of the plate-like main body 50 in the axis Y direction. A male threaded rod shaft 60 provided with a male threaded portion 60b supported in a rotatable state on the inner diameter side portion (inner peripheral surface side of the mounting portion 11e) of the main body 10 and both sides of the male threaded rod shaft 60 in the circumferential direction. A pair of support members 61 fixedly supported on the inner diameter side portion (the inner peripheral surface side of the attachment portion 11e) of the cylindrical main body 10 and the cylindrical portion below the rectangular tube portion 60a on the distal end side of the male screw rod portion 60 are rotatable. So that the upper surfaces of the support members 61 are coupled and fixed by bolts 62 so that the upper surfaces of the support members 61 are pivoted upward, and the male screw rod shaft 60 between the male screw portion 60b and the cylindrical portion. Projected and formed on the outer diameter side of the Constructed and a disc-shaped member 64 to prevent the escape of outward radial direction of the externally threaded rod shaft 60 lower surface in contact with the wood 63.

  Next, the water pressure tester A in which the annular water blocking bag 20 and the annular movement blocking body 12 are mounted and fixed on the cylindrical main body 10 is carried into the water pipes P1 and P2, and the water pressure test of the joint B is performed. Will be described.

  As shown in FIG. 6, for example, the water pressure tester A is carried into the water pipe P2 from the opening end (not shown) of the water pipe P2, and the water pressure tester A is moved in the rear direction (right side of FIG. 6). ), The male threaded portion 40a of the operating rod 40 is screwed and attached to the female threaded portion 15a of the mounting member 15 disposed at the lower part of the end of the cylindrical body 10, and the operating rod 40 is pressed in the tube axis X direction. Thus, the hydraulic pressure testing machine A is caused to travel along the tube axis X direction toward the vicinity of the joint B through the cylindrical body 10. At this time, the outer diameter portion (outer diameter side tip portion) of the annular water blocking bag 20 in the reduced diameter state does not protrude from the outer diameter side portions of the main body side flange portion 11b and the blocking body side flange portion 12A, and the mounting recess. It becomes the state accommodated reliably in 19, and does not contact the pipe | tube inner peripheral surfaces 1a and 2a of the water pipes P1 and P2, and damage to the annular water stop bag 20 is prevented.

As shown in FIG. 7A, the wheel 51 on the front side in the traveling direction (left side in FIG. 6) in the traveling mechanism C passes through the rear side S2 of the gap S in the joint B and is positioned above the gap S. When the wheel 51 is about to drop into the gap S, the drop prevention member 52 located behind the wheel 51 comes into contact with the inner peripheral surface 2a of the water pipe P2, and the wheel 51 falls into the gap S. It is prevented. Moreover, as shown in FIG.7 (b), until the said wheel 51 passes the clearance gap S and contact | abuts to the front side S1, the drop-off prevention member 52 located in the back of the said wheel 51 is the inside of the water pipe P2. It will be in the state contact | abutted on the surrounding surface 2a, and the said wheel 51 will be prevented from dropping into the clearance gap S. FIG. Therefore, even when the clearance S that opens radially inward is formed on the inner peripheral surfaces 1a and 2a of the water pipes P1 and P2 in the joint portion B, the clearance S is surely prevented without dropping off the wheels 51. Can pass through. Further, since the lower end surface 52a of the drop-off prevention member 52 is disposed so as to be slightly above the lower end of the wheel 51, the drop-off prevention member 52 can travel even when traveling in places other than the gap S. There is no inhibition.
Therefore, the traveling operation by the operating rod 40 causes the wheel 51 to pass through the gap S of the joint portion B, and a pair of positions are displaced to both sides in the axial Y direction with respect to the joint portion B of the water pipes P1 and P2. An annular water blocking bag 20 can be positioned.

Here, in a state in which the pair of annular water blocking bags 20 are positioned at positions shifted to both sides in the axis Y direction with respect to the gap S of the joint portion B of the water pipes P1 and P2, the cylindrical main body 10 In some cases, the axis Y of the water pipe and the pipe axis X of the water pipes P1, P2 are misaligned.
Therefore, before carrying the water pressure tester A into the water pipes P1 and P2 or at the start of carrying in, the handle H is attached to the pair of radial positioning mechanisms D and the handles H are appropriately rotated (see FIG. 8A). Then, each traveling mechanism C is moved relative to the cylindrical main body 10 so that the axis Y and the tube axis X are aligned so as to be substantially concentric.
At this time, the traveling mechanism C causes the radial positioning mechanism D to move the traveling mechanism C in the tube radial direction relative to the end surfaces 10a of both ends of the cylindrical main body 10 and the end surfaces of the end portions of both annular movement blocking bodies 12. Since the pair of hanging portions 55 for guiding along 12b is provided, the traveling mechanism C formed longer than the length of the cylindrical main body 10 in the axis Y direction and provided with the wheels 51 at both ends is connected to the cylinder. When the wheels 51 are extended and arranged from both ends of the cylindrical main body 10 and move relative to each other in the tube diameter direction, they extend from both ends of the cylindrical main body 10 in the axial Y direction and are more than the wheels 51 of the travel mechanism C. The traveling mechanism C can be guided in the direction along the both end faces 10a and 12b, which are the pipe radial direction, by the pair of hanging portions 55 at two positions located on the center side. Thereby, the longitudinal direction of the traveling mechanism C is maintained in a state substantially parallel to the axis Y direction to prevent tilting, and both the wheels 51 arranged in the traveling mechanism C are connected to the pipes of the water pipes P1 and P2. It becomes possible to make it contact | abut to the surrounding surfaces 1a and 2a. In addition, since the pair of hanging portions 55 is disposed closer to the center side than the wheel 51 in the axis Y direction, the pair of hanging portions 55 abut against the wheels 51 and the like as the traveling mechanism C moves relative to each other. Nor.

  Next, as shown in FIGS. 9 and 10, compressed air from the in-bag injecting tube 33 is injected into the annular water-stopping bag 20 from the inner diameter side through the injecting fitting 21. Along with this, both the annular water blocking bags 20 are efficiently expanded to the outer diameter side with only the outer diameter portion 24 having directivity without the inner diameter portion 22 and both end portions 25 being substantially enlarged. Between the pipe inner peripheral surfaces 1a and 2a, which are displaced to both sides in the axial Y direction with respect to the joint portions B of the water pipes P1 and P2, respectively, on both sides of the outer peripheral surface 11 of the cylindrical body 10 The diameter of the water-stopping bag 20 is expanded to the water-stopping state, and is expanded to the water-stopping state, and the outer peripheral surface 11 of the cylindrical body 10 and the pipe inner peripheral surfaces 1a and 2a of the water pipes P1 and P2. An annular sealed space V can be formed.

  Then, as shown in FIG. 11, in the state which expanded the diameter of both the annular water stop bags 20 to the water stop state, the outer peripheral surface 11 of the both annular water stop bags 20 and the cylindrical main body 10 and the water pipes P1 and P2 The annular sealed space V formed by the pipe inner peripheral surfaces 1a and 2a is filled with the water W for water pressure test supplied from the water injection pipe 31 of the water supply unit 30, and exhausted from the annular sealed space V. The air Q is exhausted through 32. Then, after filling the annular sealed space V until the water W reaches a predetermined water pressure and after a predetermined time has elapsed, the elastic sealing material 4 that realizes the watertight state of the joint portion B of the water pipes P1, P2 The presence or absence of water leakage can be inspected.

  After completion of the inspection, the compressed air in the annular water-stopping bag 20 is discharged through the injection pipe 33, the annular water-stopping bag 20 is reduced in diameter, and the water pressure tester A is operated to run in the water pipes P1 and P2. And take it out.

[Another embodiment]
(A) In the above-described embodiment, the annular movement blocking body 12 is externally fitted (an example of a fitted state) to the blocking body fitting portion 11d (an example of both ends of the cylindrical body 10) on the outer peripheral surface 11 of the cylindrical body 10. ) With bolts 13 and nuts 14 (an example of fixing means), but other configurations may be employed.

  For example, as shown in FIG. 12, only the bag mounting portion 11a for mounting the main body side flange portion 11b and the annular water blocking bag 20 is formed at both ends of the cylindrical main body 10, and the step portion 11c and the blocking member fitting portion 11d are formed. Is further formed, and an internal thread portion 11g is formed on the inner peripheral surface of the bag mounting portion 11a, and an external thread portion 12c and an external thread portion 12c that can be screwed to the external thread portion 11g on the outer peripheral portion of the annular movement blocking body 12 are provided. It is good also as a structure which provides the blocker side collar part 12A in the edge part side. Accordingly, the male threaded portion 12c of the annular movement blocking body 12 is screwed into the female threaded portion 11g on the inner peripheral surface of the bag mounting portion 11a, whereby the end side of the annular water-stopping bag 20 that is sheathed on both bag mounting portions 11a. It can be set as the structure which the annular movement prevention body 12 which blocks | prevents the movement to is fixed by the screw | thread connection structure which is an example of a fixing means in the fitting state so that attachment or detachment is possible.

  Moreover, for example, as shown in FIG. 13, a bag mounting part 11a, a step part 11c, and a blocking body fitting part 11d for mounting the main body side flange part 11b, the annular water blocking bag 20 are formed at both ends of the cylindrical main body 10. In addition, a substantially U-shaped fitted portion 11h that opens to one side in the circumferential direction as viewed in the outer diameter direction is formed on the end side of the blocking body fitting portion 11d, and the annular movement blocking body 12 is further formed. Is provided with an annular blocking member side flange 12A projecting to the outer diameter side at a portion facing the annular water blocking bag 20 in the axial Y direction, and the end side of the blocking member side flange 12A is reversed in a sectional view. A so-called bayonet structure may be provided in which a T-shaped fitting portion 12d is provided. As a result, the blocking body side flange 12A of the annular movement blocking body 12 is moved in the direction of the axis Y until it comes into contact with the stepped portion 11c and is fitted on the blocking body fitting portion 11d. In this state, the annular movement blocking body 12 Is rotated in the circumferential direction, and the inverted T-shaped fitting portion 12d is fitted to the substantially U-shaped fitting portion 11h formed on the end side from the blocking body fitting portion 11d. An annular movement blocking body 12 that prevents movement of the annular water-stopping bag 20 mounted on both bag mounting portions 11a toward the end side is fixed by a bayonet structure that is an example of a fixing means in a detachable fitting state. It can be set as the structure which becomes.

(B) In the said embodiment, although the lower end surface 52a of the drop-off prevention member 52 was formed so as to be parallel to the pipe inner peripheral surfaces 1a, 2a of the water pipes P1, P2, for example, as shown in FIG. The lower end surface may be a tapered surface 52b that is separated from the pipe inner peripheral surfaces 1a and 2a toward both ends 50A of the plate-like main body 50. In this case, the inclination angle α is set to, for example, about 1 ° to 5 °, preferably about 3 ° with respect to the pipe inner peripheral surfaces 1a and 2a, so that the front side S1 and the rear side S2 of the gap S are set. It becomes easy to get over.

(C) In the above embodiment, the wheels 51 are disposed on the end side in the axial Y direction at both ends 50A of the plate-like main body 50 of the traveling mechanism C, and the drop-off prevention member 52 is disposed on the center side. For example, as shown in FIG. 14, the wheel 51 may be disposed on the center side, and the drop-off preventing member 52 may be disposed on the end side.
Further, the drop-off preventing member 52 can be a hook-like member that is long in the axis Y direction. In this case, the drop-off preventing member 52 can also be arranged at a location that is biased in the circumferential direction with respect to the plate-like main body 50.

(D) In the said embodiment, although compressed air was inject | poured in the annular water stop bag 20, if it is the structure which can change an annular water stop bag into a diameter-reduced state and a diameter-expanded state satisfactorily, as fluid to inject | pour May be a gas such as air or a liquid such as water.

(E) In the above embodiment, the traveling mechanism C and the radial positioning mechanism D are disposed in pairs symmetrically with respect to the vertical line including the axis Y as viewed in the axis Y direction. 10 can be run along the direction of the pipe axis X in the water pipes P1 and P2, and the pipe axis X and the axis Y can be substantially concentric. In addition, the configuration may be such that three or more are arranged, and the arrangement may not be symmetrical with respect to the perpendicular.

(F) In the above embodiment, the water seal state of the elastic seal material 4 at the fitting connection portion of the insertion tube portion 1 and the receiving tube portion 2 as the joint portion B is targeted for the water pipe P1 and the water pipe P2 as the fluid pipe. For example, as a fluid pipe, a gas pipe capable of allowing other fluids to flow is targeted, and as a joint part B, for example, a watertight state of an elastic seal material at a flange connection point is inspected or inserted. In the configuration in which the elastic sealing material at the fitting connection portion of the mouth tube portion 1 and the receiving tube portion 2 is pressed and fixed by a push ring, the watertight state of the elastic sealing material can be inspected.

(G) In the above-described embodiment, the hydraulic pressure testing machine A is configured to travel by a push-pull operation by artificial force. However, the hydraulic testing machine A may be configured to self-run by driving means such as a motor or an engine.

  As described above, it is possible to simply and quickly and surely mount and fix the bag on the cylindrical body while preventing damage to the annular water-stopping bag. It is possible to provide a hydraulic tester that can be structured.

DESCRIPTION OF SYMBOLS 1 Insertion pipe part 1a Pipe inner peripheral surface 2 Receptacle pipe part 2a Pipe inner peripheral surface 4 Elastic sealing material 10 Cylindrical main body 10a End surface 11 Outer peripheral surface 11a Bag mounting part 11b Main body side collar part 11c Step part 11d Blocker fitting part 12 Annular movement blocking body 12A Blocking body side flange 12b End surface 15 Mounting member 15a Female threaded portion 19 Mounting recess 20 Annular water blocking bag 22 Inner diameter portion 23 Outer diameter portion 30 Water supply portion 40 Operation rod 40a Male threaded portion 50 Plate-like main body 50A Both ends 51 Wheel 52 Fall-off prevention member 55 Hanging part (guide part)
A water pressure tester B joint C running mechanism D radial positioning mechanism P1 water pipe (fluid pipe)
P2 Other water pipes (fluid pipes)
S clearance S1 front side S2 rear side X tube axis (fluid tube)
Y axis (cylindrical body)
V Annular sealed space W Water for water pressure test

Claims (7)

Water is stopped between the outer peripheral surface of the cylindrical main body that can be carried into the fluid pipe and between the inner peripheral surface of the pipe that is displaced to both sides in the axial direction with respect to the joint portion of the fluid pipe. A pair of annular water-stopping bags that can be expanded in diameter to a state, and both the annular water-stopping bag that has been expanded in diameter to the water-stopping state, the outer peripheral surface of the cylindrical body, and the inner peripheral surface of the fluid pipe A water pressure tester provided with a water supply part for supplying water for water pressure test in an annular sealed space formed by:
On the central side in the axial direction of both bag mounting portions on the outer peripheral surface of the cylindrical main body, there are main body side flanges that define the maximum insertion position in the axial direction of the annular water-stopping bag that is sheathed from the end side. An annular movement blocking body that protrudes from the outer diameter side and that prevents the movement of the annular water-stopping bag that is externally mounted on both bag mounting parts to the end part side of the bag mounting part is attached and detached. It is fixed by fixing means along the pipe diameter direction ,
In a portion facing the annular water blocking bag in the annular movement blocking body in the axial center direction, a blocking body side collar protruding to the outer diameter side is formed, and both bag mounting portions on the outer peripheral surface of the cylindrical body are, A mounting concave portion of the annular water-stopping bag defined by the main body side collar and the blocking body side collar is formed, and on the end side boundary portion of the both bag mounting sites on the outer peripheral surface of the cylindrical main body, A stepped portion is formed which is larger in diameter than the inner diameter of the blocking body side flange of the annular movement blocking body, and the blocking body side flange contacts the axial center direction to define the maximum insertion position of the annular movement blocking body. Hydraulic testing machine. According to claim 1, the outer diameter is smaller or equally set than the outer diameter of the body-side flange portion and the blocking side flange portion of the reduced diameter state of said annular water stopping bag mounted before Symbol mounting recess Water pressure testing machine. A traveling mechanism having wheels at both ends that allow the cylindrical body to travel along the axial direction of the pipe in the fluid pipe has the cylindrical shape with the wheels extending from both ends of the cylindrical body. A radial positioning mechanism disposed at an inner diameter side portion of the main body and capable of moving the traveling mechanism relative to the cylindrical main body in a tube radial direction is disposed across the traveling mechanism and the cylindrical main body. In the traveling mechanism, relative movement in the tube radial direction of the traveling mechanism by the radial positioning mechanism is performed along the end surfaces of both ends of the cylindrical main body and the end surfaces of the end portions of both annular movement blocking bodies. The water pressure testing machine according to claim 1 or 2 , wherein the pair of guide portions for guiding the guide is disposed closer to the center than the wheel. When the wheel passes through a gap opening inward in the pipe radial direction at the joint portion of the fluid pipe, the traveling mechanism contacts at least one of the pipe inner circumferential surfaces located on both sides of the gap. The water pressure tester according to claim 3 , wherein a drop-off preventing member that prevents the wheel from dropping into the gap is provided. Each of the travel mechanism and the radial direction positioning mechanism is symmetrical with respect to a perpendicular passing through the axial center of the cylindrical main body in the lower half side portion of the inner diameter side portion of the cylindrical main body as viewed in the axial direction. The water pressure tester according to claim 3 or 4 , wherein a pair is provided. The bottom at the end of the cylindrical body, according to claim 5 in which the mounting member of the traveling operable actuating rod along the cylindrical body that is carried into the fluid conduit in the tube axis direction is disposed Water pressure testing machine. When the cross-sectional shape of the annular water blocking bag is in a reduced diameter state, the inner diameter portion is formed linearly, the outer diameter portion has both end portions and a center portion in the axial direction bulge to the outer diameter side, and both end portions and the center portion. In the expanded state where the fluid is injected into the inside, the outer diameter portion is formed between the both end portions and the center portion in the axial direction and between the both end portions and the center portion. The hydraulic pressure testing machine according to any one of claims 2 to 6 , wherein a portion between them is formed in a substantially arc shape that bulges to the outer diameter side than the outer diameter in the reduced diameter state.

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