Water-tight test device and water-tight test method

Abstract

A water-tight test device (1) for performing a water-tight test of a joint portion of pipes (2, 3) after joining each other, has a test device main body (21) and a moving operation lever (22) for moving the test device main body (21) inside the pipes from the outside of the end portions of the pipes in the pipe axis direction (B), the moving operation lever (22) is provided to the test device main body (21) and extends along the pipe axis direction (B), a main support member (61, 62) that supports the moving operation lever (22) on the outside of the pipes is provided to the moving operation lever (22), the main support member (61, 62) has a main rolling member (75) that is rotatable at the lower end portion, and is capable of switching between a support attitude (K) that supports the moving operation lever (22) on the outside of the pipes and a folding attitude that is folded into the pipes, and is biased from the folding attitude to the support attitude (K).

Description

TECHNICAL FIELD

[0001] The present application relates to a water tightness test device and a water tightness test method that perform a water tightness test of a joint portion of a pipe. BACKGROUND

[0002] In the past, as such a water tightness test device, for example, there has been a water tightness test device as shown in FIG. 1, which has a test device main body 124 that performs a water tightness test of a joint portion 123 of pipes 121, 122 in the pipes 121, 122, and a moving operation lever 125 for moving the test device main body 124 in the pipes 121, 122 in a pipe axis direction B. Figure 16

[0003] The test device main body 124 has a cylindrical member 127 and a pair of annular water stop bags 128 provided to the cylindrical member 127 that can be subjected to a diameter expansion operation. An annular seal space 129 is formed in the joint portion 123, which is surrounded by the two water stop bags 128 in a water stop state and an outer peripheral surface of the cylindrical member 127 and inner peripheral surfaces of the two pipes 121, 122.

[0004] The test device main body 124 checks a water leakage from an elastic seal member 131 of the joint portion 123 by supplying water 130 for a water pressure test from a water injection pipe 130 to be filled into the seal space 129 and applying a water pressure.

[0005] The moving operation lever 125 is installed to the cylindrical member 127 of the test device main body 124 and extends in the pipe axis direction B.

[0006] Thus, by a push-pull operation of the moving operation lever 125 in the pipe axis direction B by an operator, the test device main body 124 in the pipes 121, 122 can be moved in the pipe axis direction B to be positioned at the joint portion 123. In addition, after the water tightness test of the joint portion 123 of the pipes 121, 122, the test device main body 124 can be taken out to the outside from an open end portion of the pipe 122 by an operation of the moving operation lever 125 in the pipe axis direction B by an operator.

[0007] Further, the water tightness test device as described above is disclosed in Japanese Patent Application Publication No. 2013-40866. SUMMARY

[0008] PROBLEMS TO BE SOLVED BY THE INVENTION

[0009] ​However, in the water tightness test device described in Japanese Patent Application Publication No. 2013-40866, since the movement lever 125 is a long member, there is a problem that it is easily deflected downward by its own weight. In addition, stress acts on the mounting portion of the movement lever 125 and the cylindrical member 127, and there is a problem that the root of the movement lever 125 is easily damaged.

[0010] Therefore, before the pipe 122 is joined to the pipe 121, it is necessary to support the movement lever 125 with a support table or the like, and the support table can interfere with the pipe joining work when the pipe 122 is joined to the pipe 121.

[0011] An object of the present application is to provide a water tightness test device and a water tightness test method capable of preventing deflection or damage of a movement lever.

[0012] Means for solving the problem

[0013] A water tightness test device for performing a water tightness test of a joined portion of pipes to each other after joining,

[0014] having a test device main body that performs a water tightness test of a joined portion of pipes to each other in the pipes, and a movement lever for moving the test device main body in the pipes from the outside of the end portion of the joined pipes in the pipe axis direction,

[0015] the movement lever is provided to the test device main body and extends in the pipe axis direction,

[0016] a main support member that supports the movement lever on the outside of the pipes is provided to the movement lever,

[0017] the main support member has a main rolling member that is rotatable at the lower end portion, and is capable of being switched between a support attitude in which the movement lever is supported on the outside of the pipes and a folded attitude in which the movement lever is folded into the pipes, and is biased from the folded attitude to the support attitude.

[0018] Thereby, when the pipes are joined to each other, in a state in which the test device main body is inserted into the pipes, the main support member is switched to the support attitude, and the movement lever that protrudes outward from the end portion of the pipes is supported. Thereby, deflection or damage of the movement lever can be prevented.

[0019] In addition, in a state in which the main support member is switched to the support attitude and the movement lever that protrudes outward from the end portion of the pipes is supported, by operating the movement lever in the pipe axis direction, the test device main body in the pipes can be moved in the pipe axis direction. At this time, since the main rolling member of the main support member rotates in the pipe axis direction on the pipe setting surface outside the end portion of the pipes, the movement lever can be easily operated in the pipe axis direction.

[0020] Further, when the movement lever is inserted into the pipe, the main support member is retracted into the pipe by switching to the folded posture. Therefore, the movement lever can be easily inserted into the pipe, and the pipes can be easily joined to each other. Thus, the main support member does not interfere with the joining of the pipes when the pipes are joined to each other.

[0021] According to the water tightness testing device of the present application, it is preferable that a sub support member that supports the movement lever in the pipe is provided to the movement lever, and the sub support member has a rotatable sub rolling member at a lower end portion.

[0022] Thus, when the movement lever is inserted into the pipe, the sub support member supports the movement lever in the pipe. Therefore, the movement lever can be prevented from being bent or damaged.

[0023] Further, when the movement lever is operated in the pipe axis direction, the sub rolling member rotates on the inner surface of the pipe in the pipe axis direction. Therefore, the movement lever can be easily operated in the pipe axis direction.

[0024] According to the water tightness testing device of the present application, it is preferable that the front end portion of the movement lever protrudes outward from the end portion of the joined pipes in a state where the testing device main body is positioned at the joining portion of the pipes.

[0025] Thus, after the testing device main body is positioned at the joining portion of the pipes and the water tightness test of the joining portion is performed, the front end portion of the movement lever can be easily operated from the outside of the end portion of the pipes.

[0026] According to the water tightness testing device of the present application, it is preferable that the testing device main body has a rotatable movement rolling member for moving in the pipe axis direction in the pipe.

[0027] Thus, by operating the movement lever in the pipe axis direction, the testing device main body is moved in the pipe axis direction in the pipe easily and smoothly in conjunction with the movement lever.

[0028] The water tightness testing method using the water tightness testing device of the present application is characterized in that,

[0029] in a state where the testing device main body is inserted into the first pipe, a movement lever that protrudes outward from the end portion of the first pipe is supported by a main support member in a support posture,

[0030] the second pipe is moved toward the end portion of the first pipe in a joining direction,

[0031] by abutting the one end portion of the second pipe against the main support member and pushing the main support member in the joining direction, the main support member is switched from the support posture to a folded posture and is retracted into the second pipe,

[0032] In a state where the moving lever is inserted into the second pipe, the end portion of the second pipe is joined to the end portion of the first pipe,

[0033] The moving lever is operated from the outside of the other end portion of the second pipe, and the test device main body is moved to the joined portion of the first pipe and the second pipe,

[0034] After the water tightness test of the joined portion is performed by the test device main body, the moving lever is operated from the outside of the other end portion of the second pipe, and the test device main body is moved from the joined portion to the other end portion of the second pipe, whereby the main support member protrudes from the other end portion of the second pipe to the outside, and is switched from the folded attitude to the support attitude, and the moving lever protruding from the other end portion of the second pipe to the outside is supported.

[0035] Thus, in a state where the test device main body is inserted into the first pipe, the moving lever protruding from the end portion of the first pipe to the outside is supported by the main support member in the support attitude, and thus, the bending or damage of the moving lever can be prevented.

[0036] Further, when the end portion of the second pipe is joined to the end portion of the first pipe, the main support member is switched to the folded attitude and is retracted into the second pipe, and thus, the main support member does not interfere with the joining of the pipes.

[0037] Further, after the pipes are joined to each other and the water tightness test is performed, the moving lever is operated in the pipe axis direction from the outside of the other end portion of the second pipe, and the test device main body is moved from the joined portion to the other end portion of the second pipe, whereby the main support member is switched to the support attitude, and the moving lever protruding from the other end portion of the second pipe to the outside is supported. At this time, since the main rolling member of the main support member rotates on the pipe setting surface outside the other end portion of the second pipe in the pipe axis direction, the moving lever can be easily operated in the pipe axis direction.

[0038] According to the water tightness test method of the present application, it is preferable that, in a state where the moving lever is inserted into the second pipe, the sub support member provided to the moving lever supports the moving lever in the second pipe.

[0039] Thus, when the moving lever is inserted into the second pipe, the sub support member supports the moving lever in the second pipe. Thus, the bending or damage of the moving lever can be prevented.

[0040] Effects of the Invention

[0041] As described above, according to the present application, when the pipes are joined to each other, in a state where the test device main body is inserted into the pipes, the main support member is switched to the support attitude, and supports the moving lever protruding from the end portion of the pipes to the outside. Thus, the bending or damage of the moving lever can be prevented. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 is a sectional view of a water-tight test device of a first embodiment of the present application, showing a state in which pressing of first and second sealing members is released.

[0043] Figure 2 is a sectional view of the water-tight test device, showing a state in which the first and second sealing members are pressed.

[0044] Figure 3 is a view in the X-X direction in Figure 1

[0045] Figure 4 is a view in the X-X direction in

[0046] Figure 5 is an enlarged side view of a first main support member and a first sub support member of the water-tight test device, showing a state in which the first main support member is switched to a supporting attitude.

[0047] Figure 6 is a view in the X-X direction in Figure 5

[0048] Figure 7 is an enlarged side view of a first main support member and a first sub support member of the water-tight test device, showing a state in which the first main support member is switched to a folding attitude.

[0049] Figure 8 is a view in the X-X direction in Figure 7

[0050] Figure 9 is a view in the X-X direction in

[0051] Figure 10 is a view in the X-X direction in

[0052] Figure 11 is a view in the X-X direction in

[0053] Figure 12 is a view in the X-X direction in

[0054] Figure 13 is a view in the X-X direction in

[0055] Figure 14 is a view in the X-X direction in

[0056] ​​​Figure 15 This is a diagram showing the steps involved in conducting a watertight test using this watertight testing device.

[0057] Figure 16 This is a cross-sectional view of a previous watertight test apparatus. Detailed Implementation

[0058] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0059] (First Implementation)

[0060] In the first embodiment, such as Figures 1-4 As shown, 1 is a watertight testing device used for conducting a watertight test on the joint portion 4 of the joined pipes 2 and 3. Pipes 2 and 3 are PN-shaped ductile iron pipes (an example of ductile iron pipes) with an insertion port 6 at one end and a socket 7 at the other end. Pipes 2 and 3 are joined and configured within a pipe laying pit 9 formed underground to constitute pipe 10 (see reference). Figure 12 ).

[0061] At the joint 4, the insertion port 6 of the second tube 3 is inserted into the receiving port 7 of the first tube 2 and engaged. A locking ring receiving groove 12 and a sealing body mounting recess 13 are formed on the inner circumferential surface of the receiving port 7.

[0062] A locking ring 15 for preventing disengagement is accommodated in the locking ring receiving groove 12. Additionally, a ring-shaped sealing body 16 made of an elastic material such as rubber is installed in the sealing body mounting recess 13. The sealing body 16 is sandwiched between the outer peripheral surface of the insertion port 6 and the inner peripheral surface of the socket 7 and is compressed in the pipe diameter direction A. Thus, the insertion port 6 and the socket 7 are sealed.

[0063] The watertightness test apparatus 1 has a test apparatus body 21 for performing watertightness tests on the joint portion 4 inside the pipes 2 and 3, and a moving operating lever 22 for moving the test apparatus body 21 inside the pipes 2 and 3 in the pipe axis direction B.

[0064] The main body 21 of the test device will be described below.

[0065] The main body 21 of the test apparatus has a cylindrical core 25, a first sealing member 26 and a second sealing member 27, a first pressing member 29 and a second pressing member 30, a moving device 32, a test fluid supply device 33, and a support device 34.

[0066] The first sealing member 26 is a ring-shaped member made of elastic material such as rubber, which seals the outer peripheral surface of the core 25 and the inner peripheral surface of the second tube 3. Furthermore, the second sealing member 27 is a ring-shaped member made of elastic material such as rubber, which seals the outer peripheral surface of the core 25 and the inner peripheral surface of the first tube 2.

[0067] A fitting recess 36 is formed in the outer peripheral surface of the base end portion of the first and second sealing members 26 and 27.

[0068] A first sealing member insertion space 37 is formed between the outer peripheral surface of the core 25 and the inner peripheral surface of the second pipe 3. Further, a second sealing member insertion space 38 is formed between the outer peripheral surface of the core 25 and the inner peripheral surface of the first pipe 2.

[0069] The first pressing member 29 is a member that presses and compresses the first sealing member 26 into the first sealing member insertion space 37, and has a fitting protrusion 40 formed in the entire periphery.

[0070] Further, the second pressing member 30 is a member that presses and compresses the second sealing member 27 into the second sealing member insertion space 38, and has the fitting protrusion 40 as with the first pressing member 29.

[0071] The fitting protrusion 40 of the first pressing member 29 is fitted into the fitting recess 36 of the first sealing member 26, whereby the first sealing member 26 is fitted to the first pressing member 29 in the pipe axis direction B. Further, the fitting protrusion 40 of the second pressing member 30 is fitted into the fitting recess 36 of the second sealing member 27, whereby the second sealing member 27 is fitted to the second pressing member 30 in the pipe axis direction B.

[0072] The moving device 32 is a device that moves the first and second pressing members 29 and 30 in the pipe axis direction B in a pressing direction C (refer to Figure 2 ) in which the members are brought closer to each other and a pressing release direction D (refer to Figure 1 ) in which the members are separated from each other.

[0073] That is, the moving device 32 has a movable rod 42 that is tubular and is freely movable in the pipe axis direction B and is attached to the second pressing member 30, a receiving member 43 provided at the front end portion of the movable rod 42, and a plurality of double-acting jacks 44 that are freely extendable and contractable in the pipe axis direction B. The double-acting jacks 44 are attached between the first pressing member 29 and the receiving member 43.

[0074] The supporting device 34 is a device that supports the core 25, the first and second pressing members 29 and 30, and the moving device 32, and has a shaft body 46 inserted into the movable rod 42, a plurality of leg frames 47 provided at both end portions of the shaft body 46, and moving wheels 48 that are freely rotatable and are provided at the lower end portions of the leg frames 47. Further, the moving wheels 48 are an example of a moving rolling member for moving the test device main body 21 in the pipe axis direction B, and are freely rollable in the pipe axis direction B on the inner pipe surfaces 2a and 3a of the pipes 2 and 3.

[0075] As Figure 2 shown, when the first pressing member 29 and the second pressing member 30 are moved in the pressing direction C to reach the pressing position PI, the first sealing member 26 is pressed into the first sealing member insertion space 37, and the second sealing member 27 is pressed into the second sealing member insertion space 38.

[0076] Further, as Figure 1 shown, when the first pressing member 29 and the second pressing member 30 are moved in the pressing release direction D to return to the pressing release position P2, the pressing of the first sealing member 26 and the second sealing member 27 is released.

[0077] As Figure 1 , Figure 2 shown, when the test device main body 21 is set in the joint portion 4 of the pipes 2, 3, the test space 50 is formed in the entire circumference between the outer peripheral surface of the core 25 in the pipe diameter direction A and the inner peripheral surface of the pipes 2, 3 and between the first sealing member 26 and the second sealing member 27 in the pipe axis direction B. The test space 50 communicates with the sealing body mounting recess 13 via the gap 51 between the inner end of the receiving port 7 and the front end of the insertion port 6.

[0078] The test fluid supply device 33 is a device that supplies water 53 (an example of a test fluid) to the test space 50 from the inside of the core 25, and has a water supply hose 54 connected to the inner peripheral lower portion of the core 25 and a water pressure pump (omitted from the drawing) provided at the front end of the water supply hose 54.

[0079] Further, an air exhaust hose 57 that exhausts air in the test space 50 is connected to the inner peripheral upper portion of the core 25. Further, the water supply hose 54 and the air exhaust hose 57 pass through the first pressing member 29.

[0080] The movement operation lever 22 is detachably coupled to the front end portion of the shaft body 46 of the test device main body 21 and extends in the pipe axis direction B. Further, the water supply hose 54 and the air exhaust hose 57 are disposed along the movement operation lever 22 from the test device main body 21.

[0081] As Figure 4 shown, the first main support member 61 and the second main support member 62 are provided on the movement operation lever 22 to support the movement operation lever 22 on the inner wall surface 9a (an example of a pipe setting surface) of the pipe laying pit 9 on the outside of the pipes 2, 3, and the first sub support member 64 and the second sub support member 65 are provided to support the movement operation lever 22 on the inner pipe surface 3a in the second pipe 3.

[0082] As Figures 5-7As shown, the first main support member 61 is provided at the front end portion of the moving lever 22, has a leg frame 67 provided vertically downward from the moving lever 22, a pair of main wheel devices 68 provided at the lower end portion of the leg frame 67, and a spring cylinder 69 (an example of a force applying device) provided at the moving lever 22. The leg frame 67 has an upper frame 70 attached to the moving lever 22, a lower frame 72 rotatably coupled to the lower end portion of the upper frame 70 via a coupling shaft 71, and a mounting frame 73 provided at the lower end portion of the lower frame 72.

[0083] In addition, the pair of main wheel devices 68 are separated in the tube circumferential direction E, have a bracket 74 attached to the mounting frame 73, and a main wheel 75 (an example of a main rolling member) rotatably provided to the bracket 74.

[0084] The spring cylinder 69 has a piston rod 77 that is capable of extending and contracting, and the front end of the piston rod 77 is coupled to the lower frame 72. In addition, the piston rod 77 is forced in the extension direction J by a spring built into the spring cylinder 69.

[0085] The first main support member 61 is capable of switching between a support posture K (refer to Figures 4-6 , Figure 15 ) in which the member protrudes to the outside of the receiving port 7 (an example of the end portion of the tube) of the tubes 2, 3 and supports the moving lever 22, and a folding posture L (refer to Figure 7 , Figure 12 ) in which the member is folded into the tube 3, and is forced from the folding posture L to the support posture K by the spring cylinder 69. By rotating the lower frame 72 about the coupling shaft 71, as shown in Figure 5 , when in the support posture K, the lower frame 72 is directed downward, and as shown in Figure 7 , when in the folding posture L, the lower frame 72 is directed diagonally downward.

[0086] In addition, a limiting plate 78 is provided at the upper frame 70 of the leg frame 67, and the limiting plate 78 limits the rotation of the lower frame 72 in the support posture K. When switched to the support posture K by rotating in one direction from the folding posture L, the lower frame 72 abuts against the limiting plate 78, and is thereby prevented from further rotating in the one direction.

[0087] As shown in Figure 4 , the second main support member 62 is located between the first main support member 61 and the test device main body 21, and has the same structure as the first main support member 61.

[0088] As shown in Figure 4 , Figure 5 , Figure 7 , Figure 8As shown, the first auxiliary support member 64 is disposed between the front end of the movable operating lever 22 and the first main support member 61, and has a mounting frame 81 mounted on the lower side of the movable operating lever 22 and a pair of auxiliary wheel devices 82 disposed at the lower end of the mounting frame 81.

[0089] A pair of auxiliary wheel assemblies 82 are separated in the circumferential direction E, having a bracket 84 mounted on a mounting frame 81 and an auxiliary wheel 85 (an example of an auxiliary rolling member) rotatably disposed on the bracket 84.

[0090] like Figure 4 As shown, the second auxiliary support member 65 is located between the first main support member 61 and the second main support member 62, and has the same structure as the first auxiliary support member 64.

[0091] The following describes the watertight test method for testing the watertightness of the joint portion 4 of pipes 2 and 3 using the above-mentioned watertight test apparatus 1.

[0092] First, such as Figure 1 As shown, the plunger 45 of the double-acting jack 44 of the main body 21 of the test device is shortened, causing the first pressing member 29 and the second pressing member 30 to return to the pressing release position P2. Furthermore, as... Figure 4 As shown, with the main body 21 of the test device inserted into the first tube 2, the moving operating rod 22, which protrudes outward from the receiving interface 7 of the first tube 2, is supported by the first main support member 61 and the second main support member 62 in the support posture K.

[0093] At this time, as Figure 5 , Figure 6 As shown, by having the main wheels 75 of the first main support member 61 and the second main support member 62 abut against the inner wall surface 9a of the pipeline laying pit 9, the moving operating rod 22 is supported by the first main support member 61 and the second main support member 62, thus preventing the moving operating rod 22 from deflecting or being damaged.

[0094] In addition, Figure 5 In the image, the main wheel 75 can be seen floating upwards from the inner wall 9a of the pipeline laying pit 9. This is because the position of the main wheel 75 relative to the inner wall 9a of the pipeline laying pit 9 is such that... Figure 5 The cross-section of the pipe laying pit 9 shown is offset in the circumferential direction E (refer to...). Figure 6 ).

[0095] In addition, the locking ring 15 is pre-accommodated in the locking ring receiving groove 12 within the receiving interface 7 of the first tube 2, and the sealing body 16 is installed in the sealing body mounting recess 13.

[0096] Next, as Figure 9 As shown, the second pipe 3, which is placed on a conveyor trolley (not shown), moves toward the receiving interface 7 of the first pipe 2 in the engagement direction M.

[0097] Moreover, as shown in Figure 10 , Figure 11 , the insertion port 6 (one end portion) of the second pipe 3 abuts against the main wheel device 68 of the first main support member 61 and pushes the first main support member 61 in the engagement direction M, whereby, as shown in Figure 7 , the first main support member 61 is switched from the support attitude K to the folded attitude L against the force of the spring cylinder 69 and retracts into the second pipe 3, and then, the insertion port 6 of the second pipe 3 abuts against the main wheel device 68 of the second main support member 62 and pushes the second main support member 62 in the engagement direction M, whereby, as shown in Figure 12 , the second main support member 62 is switched from the support attitude K to the folded attitude L against the force of the spring cylinder 69 and retracts into the second pipe 3.

[0098] In a state where the mobile operation lever 22 is inserted into the second pipe 3, the insertion port 6 of the second pipe 3 is inserted into the receiving port 7 (end portion) of the first pipe 2, and the second pipe 3 is engaged with the first pipe 2. Further, as shown in Figure 8 , Figure 12 , in a state where the mobile operation lever 22 is inserted into the second pipe 3, the sub wheels 85 of the first and second sub support members 64 and 65 abut against the pipe inner face 3a of the second pipe 3, and the first and second sub support members 64 and 65 support the mobile operation lever 22 in the second pipe 3. Thereby, it is possible to prevent the mobile operation lever 22 from being bent or damaged.

[0099] Further, in Figure 7 , Figure 12 , the sub wheels 85 seem to float from the pipe inner face 3a of the second pipe 3 because the positions of the sub wheels 85 are shifted in the pipe circumferential direction E from the cross section of the second pipe 3 shown in Figure 7 , Figure 12 (see Figure 8 ).

[0100] Further, when the second pipe 3 is engaged with the first pipe 2, since the first and second main support members 61 and 62 are switched to the folded attitude L and retract into the second pipe 3, the first and second main support members 61 and 62 do not interfere with the engagement of the pipes 2 and 3.

[0101] As described above, after the second pipe 3 is engaged with the first pipe 2, as shown in Figure 13 , the operator pulls the mobile operation lever 22 from the outside of the receiving port 7 (the other end portion) of the second pipe 3 and moves the test device main body 21 toward the engagement portion 4 of the first and second pipes 2 and 3.

[0102] At this time, as shown in Figure 1As shown, since the first pressing member 29 and the second pressing member 30 are in the state of returning to the pressing release position P2, the compression of the first sealing member 26 and the second sealing member 27 is released, and the test device main body 21 can be easily moved in the pipe axis direction B.

[0103] Further, as described above, when the operator pulls the moving operation lever 22 in the pipe axis direction B from the outside of the receiving port 7 of the second pipe 3, as shown in Figure 7 、 Figure 8 、 Figure 13 As shown, since the first sub-support member 64 and the second sub-support member 65 rotate the sub-wheel 85 on the inner face 3a of the second pipe 3 in the pipe axis direction B, the moving operation lever 22 can be easily operated in the pipe axis direction B.

[0104] Further, as shown in Figure 13 In the state where the test device main body 21 is positioned at the joint portion 4, the front end portion of the moving operation lever 22 protrudes to the outside from the receiving port 7 (the end portion of the pipe after the joint) of the second pipe 3.

[0105] Further, the water tightness test of the joint portion 4 of the pipes 2, 3 to each other is performed using the test device main body 21. At this time, as shown in Figure 2 By elongating the plunger 45 of the double-acting jack 44, the first pressing member 29 moves in the pressing direction C to reach the pressing position PI, and the movable rod 42 of the moving device 32 moves in the opposite direction G of the first pressing member 29, and the second pressing member 30 moves in the pressing direction C to reach the pressing position PI.

[0106] Thus, the first pressing member 29 presses and compresses the first sealing member 26 into the first sealing member insertion space 37, and the second pressing member 30 presses and compresses the second sealing member 27 into the second sealing member insertion space 38, and therefore, the outer peripheral surface of the core 25 and the inner peripheral surface of the second pipe 3 are sufficiently sealed by the compressed first sealing member 26, and the outer peripheral surface of the core 25 and the inner peripheral surface of the first pipe 2 are sufficiently sealed by the compressed second sealing member 27.

[0107] Then, the water pressure pump is driven to supply the water 53 from the water suction hose 54 to the test space 50. Thus, the air in the test space 50 and the air in the seal body mounting recess 13 are discharged through the exhaust hose 57, and at the same time, the water 53 supplied to the test space 50 is filled into the seal body mounting recess 13 through the gap 51. In this way, in the state where the water 53 of a predetermined pressure is filled in the test space 50 and the seal body mounting recess 13, the water tightness test of the joint portion 4 of the pipes 2, 3 is performed by checking whether there is a leakage of the water 53 from the seal body 16 or the like.

[0108] After the water tightness test of the joint portion 4 is performed as described above, as shown in Figure 1As shown, by shortening the plunger 45 of the double-acting jack 44, the first pressing member 29 and the second pressing member 30 are returned to the pressing release position P2, respectively, releasing the compression of the first sealing member 26 and the second sealing member 27. Thus, the main body 21 of the test apparatus is switched to a state where it can easily move in the tube axis direction B.

[0109] Then, as Figure 14 As shown, the operator pulls the operating lever 22 from the outside of the socket 7 of the second pipe 3, so that the main body 21 of the test device moves from the joint 4 to the socket 7 of the second pipe 3.

[0110] Therefore, firstly, the first main support member 61 protrudes outward from the receiving interface 7 of the second pipe 3, and switches from the folding posture L to the supporting posture K through the force of the spring cylinder 69, as follows. Figure 5 , Figure 6 As shown, the main wheel 75 of the first main support member 61 abuts against the inner wall surface 9a of the pipeline laying pit 9, and then, as... Figure 15 As shown, the second main support member 62 further protrudes outward from the receiving interface 7 of the second pipe 3, and switches from the folded posture L to the supporting posture K by the force of the spring cylinder 69. The main wheel 75 of the second main support member 62 abuts against the inner wall surface 9a of the pipeline laying pit 9. Thus, the movable operating rod 22 protruding outward from the receiving interface 7 of the second pipe 3 is supported by the first main support member 61 and the second main support member 62, which can prevent the movable operating rod 22 from deflecting or being damaged.

[0111] Furthermore, after the aforementioned watertight test, such as Figure 15 As shown, when the operator pulls the operating lever 22 from the outside of the socket 7 of the second pipe 3 toward the pipe axis direction B, the main wheels 75 of the first main support member 61 and the second main support member 62 rotate along the pipe axis direction B on the inner wall surface 9a of the pipe laying pit 9 outside the socket 7 of the second pipe 3. Therefore, the operating lever 22 can be easily operated in the pipe axis direction B.

[0112] In addition, according to the watertightness test method described above, such as Figure 13 As shown, with the main body 21 of the test device located at the joint 4 of pipes 2 and 3, the front end of the moving operating rod 22 protrudes outward from the receiving port 7 of the second pipe 3. Therefore, after the operator performs the watertightness test on the joint 4, the operator can easily operate the front end of the moving operating rod 22 from the outside of the receiving port 7 of the second pipe 3.

[0113] Further, when the movement lever 22 is operated in the pipe axis direction B, since the movement wheels 48 of the test device main body 21 rotate on the pipe inner surfaces 2a, 3a of the pipes 2, 3, the test device main body 21 is linked to the movement lever 22, and the test device main body 21 is easily and smoothly moved in the pipe axis direction B in the pipes 2, 3.

[0114] In the above embodiment, as shown in Figure 4 the first and second main support members 61, 62 and the first and second sub support members 64, 65 are provided on the movement lever 22, but the number of the main support members 61, 62 can be one (1) or three or more. Similarly, the number of the first and second sub support members 64, 65 can be one (1) or three or more.

[0115] In the above embodiment, as shown in Figure 6 two main wheels 75 are provided separately in the pipe circumference direction E, but one main wheel 75 can be provided without separation directly below the movement lever 22.

[0116] In the above embodiment, as shown in Figure 8 two sub wheels 85 are provided separately in the pipe circumference direction E, but one sub wheel 85 can be provided without separation directly below the movement lever 22.

[0117] Further, in the above embodiment, the case where the pipe is laid in the pipe laying pit 9 in a tunnel or a shield or the like has been described, but the present application is not limited to the pipe laying pit 9, and can also be applied to the case where the pipe is laid in a trench dug on the ground (trench construction method).

Claims

1. A water tightness test device for performing a water tightness test of a joint portion of a first pipe and a second pipe after joining, characterized by, has: a test device main body that performs the water tightness test of the joint portion in the pipe; and a moving operation lever for moving the test device main body in the pipe from the pipe axis direction outside of the end portion of the pipe after the joint, the moving operation lever extending from the test device main body in the pipe axis direction, the moving operation lever is supported by a main support member on a support surface at a position between the first pipe and the second pipe before moving in the joint direction, the water tightness test device joins the pipes to each other by moving the second pipe in the joint direction with respect to the first pipe that houses the test device main body and a portion of the moving operation lever that is spaced apart from the test device main body by a distance protrudes from the pipe end toward the pipe axis direction, a main support member that supports the moving operation lever on a support surface is provided at a position between the first pipe and the second pipe before moving in the joint direction, the main support member has a main rolling member that comes into contact with the support surface at the position between the first pipe and the second pipe before moving in the joint direction, the main support member is switchable between a support attitude that supports the moving operation lever at the position between the first pipe and the second pipe before moving in the joint direction and a folded attitude that is folded into the inside of the second pipe during movement in the joint direction, the main support member is forced from the folded attitude to the support attitude, a sub support member that is not switchable in attitude is provided on the moving operation lever, the sub support member is a member that enters the inside of the second pipe when the second pipe moves in the joint direction, the sub support member has a sub rolling member that supports the moving operation lever by coming into contact with the inner surface of the second pipe when entering the second pipe, the sub rolling member does not come into contact with the support surface and cannot support the moving operation lever when positioned between the first pipe and the second pipe before moving in the joint direction.

2. The water tightness testing apparatus according to claim 1, wherein The front end portion of the moving operation lever protrudes outward from the end portion of the second pipe in a state in which the test device main body is positioned at the joint portion of the pipes.

3. The water tightness testing device according to claim 1 or 2, characterized in that The test device main body has a moving rolling member that is rotatable freely in the pipe axis direction.

4. A water tightness test method using the water tightness test device according to any one of claims 1 to 3, characterized by supporting the moving operation lever that protrudes outward from the end portion of the first pipe in the pipe axis direction by the main support member in the support attitude in a state in which the test device main body is inserted into the first pipe, moving the second pipe in the joint direction toward the end portion of the first pipe, abutting the end portion of the second pipe against the main support member and pushing the main support member in the joint direction, whereby the main support member is switched from the support attitude to the folded attitude and retracted into the second pipe, supporting the moving operation lever in the second pipe by the sub support member that is not switchable in attitude and is provided on the moving operation lever in a state in which the moving operation lever is inserted into the second pipe, and joining the end portion of the second pipe to the end portion of the first pipe, operating the moving operation lever from the outside of the other end portion of the second pipe to move the test device main body to the joint portion of the first pipe and the second pipe, After the water tightness test of the joint portion is performed with the test device main body, the movement operation lever is operated from the outside in the pipe axis direction of the other end portion of the second pipe, the test device main body is moved from the joint portion to the other end portion of the second pipe, thereby the main support member is protruded from the other end portion of the second pipe to the outside in the pipe axis direction, the folded posture is switched to the support posture, and the movement operation lever protruded from the other end portion of the second pipe to the outside in the pipe axis direction is supported.

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