JP6142428B2 - Water pressure testing machine - Google Patents

Description

  The present invention includes a cylindrical main body that can be carried into a fluid pipe, an annular water stop means that can be expanded in diameter to a state in which an annular sealed space for water pressure testing is formed on the inner peripheral surface side of the joint portion of the fluid pipe, A water supply section for supplying water for water pressure test into an annular sealed space formed by the diameter expansion operation of the annular water stop means, and a pair of traveling mechanisms disposed on both sides in the axial direction of the cylindrical body. The present invention relates to a hydraulic tester provided.

As a hydraulic tester of this type, in the hydraulic tester disclosed in Patent Document 1, a pair of tube rings as annular water stop means are provided on both sides in the axial direction on the outer peripheral surface of the cylindrical main body. Water is injected into the pair of tube rings via an infusion tube for tube ring that is disposed so as to penetrate from the inner peripheral surface side to the outer peripheral surface side of the main body. 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 exhausting air from the annular sealed space, the 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.

Further, as this type of water pressure tester, in the water pressure tester disclosed in Patent Document 2, the cylindrical portion of the cylindrical main body is constituted by an elastic cylinder (rubber hose) as an annular water-stop means, and the cylindrical main body (elastic) A pair of open ends of the pair of cylinders is watertightly closed by disk-shaped companion flanges, respectively, and is disposed inside the elastic cylinder through the rear companion flange from the outside of the cylindrical body. Water is injected into the elastic cylinder through the body injection tube. Thereby, it is comprised so that diameter expansion operation of an elastic cylinder can be carried out to the state which water-stops between the outer peripheral surface of a cylindrical main body (elastic cylinder), and the pipe | tube inner peripheral surface of a fluid pipe | tube.
Then, using the pair of water pressure testers, the diameter of each elastic cylinder is increased in a state where each water pressure tester is positioned upstream and downstream of the location where the water pressure test is performed in the fluid pipe. An annular sealed space is formed by the outer peripheral surface of each elastic cylinder and the inner peripheral surface of the fluid pipe located between the elastic cylinders. An injection pipe as a water supply section for supplying water for water pressure test into the annular sealed space and an exhaust pipe for exhausting air from the annular sealed space include a rear phase flange, an elastic cylinder, and a cylindrical body. It arrange | positions in the state which penetrates the front side companion flange. Thereby, it is supposed that the water pressure test which detects the presence or absence of the water leakage from the joint part located in an annular sealed space can be performed with the hydraulic pressure of the water with which the annular sealed space is filled.

Furthermore, in the hydraulic pressure tester disclosed in Patent Documents 1 and 2, the wheels provided in each of the pair of traveling mechanisms arranged on both sides in the axial direction of the cylindrical main body are parallel to the two wheels along the axial direction. When the hydraulic test machine is inserted into the fluid pipe and travels on the inner peripheral surface of the fluid pipe and passes through the gap formed by the joint portion of the fluid pipe, It is possible to satisfactorily prevent the wheels from falling into the gap. In addition, the wheels provided in each of the pair of traveling mechanisms are disposed at two locations on the lower half side portion in the circumferential direction of the cylindrical main body as viewed in the axial direction, while stably supporting the weight of the hydraulic testing machine. It can move along the tube axis direction.
In the hydraulic testing machine disclosed in Patent Document 2, of the two-wheel parallel wheels that are arranged in parallel along the axial direction of each traveling mechanism, only the wheel is attached downward to the front wheel. A coil spring is provided, and when the wheel is located in the gap of the joint portion of the fluid pipe, the coil spring extends and the wheel falls into the gap. Thereby, when water is filled in the annular sealed space and a water pressure test is performed, it is possible to prevent the fluid pipe from inadvertently moving and contracting the gap of the joint portion.

Japanese Patent No. 3597455 JP 2003-4581 A

Here, when the water pressure tester is inserted into the fluid pipe and placed on the inner peripheral surface of the pipe via a wheel, the axial core of the water pressure tester (cylindrical body) of the water pressure tester and the pipe of the fluid pipe The shaft may be eccentric.
Such eccentricity can be prevented to some extent by designing and adopting a plurality of annular water-stopping means (cylindrical main bodies) having an outer diameter so as to respectively correspond to the inner diameters of a plurality of types of fluid pipes. Even in such a case, due to tolerance at the time of manufacturing the fluid pipe, deformation of the fluid pipe, difference in thickness of the lining layer formed on the inner peripheral surface of the fluid pipe, deterioration over time, or partial tilting of the fluid pipe, The inner diameter of the fluid pipe may partially change and the above eccentricity may occur.

  When such eccentricity occurs, the distance between the outer peripheral surface of the annular water stop means (cylindrical main body) and the inner peripheral surface of the fluid pipe is not uniform in the circumferential direction when viewed in the axial direction, and the annular water stop means is expanded. When the diameter is operated, there are portions where the annular water stop means presses the inner peripheral surface of the pipe relatively strongly and weakly, and it becomes difficult to press the entire circumference of the pipe inner peripheral surface of the fluid pipe with equal pressure. That is, the annular water stop means is pressed against the inner peripheral surface of the pipe in a deformed state, and the water stop between the annular water stop means and the pipe inner peripheral surface cannot be stabilized, and the water stop is incomplete. There is a fear.

  On the other hand, the hydraulic tester is provided with an axis adjustment mechanism for manually moving the cylindrical body relative to the wheel radially inward or outward, and the hydraulic tester is inserted into the fluid pipe. Although it is possible to adjust the axial core of the annular water blocking means (cylindrical main body) to be concentric with the pipe axis of the fluid pipe after being placed on the inner peripheral surface of the pipe via a wheel, the device configuration is complicated. As a result, the manufacturing cost increases, and the labor and time for adjusting the shaft core after insertion into the fluid pipe become enormous, which may lead to an increase in construction period and an increase in construction cost.

  The present invention has been made in view of the above circumstances, and its main problem is to maintain the axial core of the annular water stop means (cylindrical main body) and the tube axis of the fluid pipe in a concentric state quickly and easily. Therefore, the present invention is to provide a hydraulic pressure testing machine capable of stabilizing water stoppage between the pipe inner peripheral surface by the annular water stop means and performing reliable water stoppage.

The first characteristic configuration according to the present invention is capable of expanding the diameter to a state in which a cylindrical main body that can be carried into a fluid pipe and an annular sealed space for a water pressure test are formed on the inner peripheral surface side of the joint of the fluid pipe. such an annular waterproofing means, a water supply unit for supplying water for hydrostatic testing the annular sealing space formed by the diameter expansion operation of the annular water unit, on both sides of the axial direction of the cylindrical body A hydraulic testing machine provided with a pair of traveling mechanisms, the characteristic configuration of which is
The respective front Kihashi line mechanism, even without least in the axial direction as viewed is distributed in three locations in the circumferential direction of the cylindrical body, a plurality wheels parallel which respectively are parallel or two-wheel along the axial direction of A wheel of the mold, a wheel mounting portion fixed to the cylindrical main body, a cart portion that is tiltably connected to the wheel mounting portion and supports the wheel, and along a radial direction of the cylindrical main body Arranged between the wheel mounting part and the carriage part, and moving and energizing the carriage part to the radially outer side of the cylindrical body to bring the wheel into contact with the inner peripheral surface of the fluid pipe; An urging portion that maintains the tube axis of the fluid tube and the axis of the cylindrical main body in a concentric state is provided.

  According to the above configuration, each traveling mechanism constituting the pair of traveling mechanisms disposed on both sides in the axial direction of the cylindrical main body is dispersed at least at three locations in the circumferential direction of the cylindrical main body as viewed in the axial direction. The arranged wheel and each wheel are moved and urged radially outward of the cylindrical body so as to contact the inner peripheral surface of the fluid pipe, and the tube axis of the fluid pipe and the axis of the cylindrical body are concentric. And an urging portion for maintaining the state. Therefore, all the wheels (each wheel provided at least at three locations in the circumferential direction) of each traveling mechanism in the hydraulic pressure tester before being inserted into the fluid pipe are urged to move radially outward by the urging portion. Thus, the outer peripheral surface of the cylindrical main body and the inner peripheral surface of the fluid pipe to be inserted are always configured to protrude radially outward.

  Therefore, when inserting the hydraulic pressure tester into the fluid pipe, first, the wheels of the traveling mechanism disposed on the side of the insertion end side in the axial direction of the cylindrical body are slightly inserted into the fluid pipe. The cylindrical body is pushed along the pipe axis direction of the fluid pipe using each of these wheels as an insertion guide while being in contact with the inner peripheral surface of the pipe, and subsequently, a traveling mechanism disposed on the side portion on the rear end side of the insertion The cylindrical main body can be further pushed into the fluid pipe while the wheels are brought into contact with the inner peripheral surface of the pipe, and smooth insertion into the fluid pipe can be realized.

  In particular, after inserting the hydraulic pressure tester into the fluid pipe, each wheel of each traveling mechanism is urged to move outward in the radial direction of the cylindrical body by the urging portion, so that the inner peripheral surface of the fluid pipe is always urged. And pressed with a predetermined pressure. For this reason, the space | interval of the outer peripheral surface of a cylindrical main body and the pipe | tube inner peripheral surface of a fluid pipe | tube is comprised so that it may become uniform or substantially uniform in the circumferential direction automatically. In other words, the axial bias of the cylindrical main body and the tube axis of the fluid pipe can be automatically maintained concentrically by the biasing movement of each wheel by the biasing portion. Accordingly, when the diameter of the annular water stop means is increased at a predetermined water pressure test location, the inner peripheral surface of the fluid pipe can be uniformly pressed in the circumferential direction by the enlarged diameter water stop means. The water stop state between the outer peripheral surface of the means and the pipe inner peripheral surface of the fluid pipe can be stabilized and reliable water stop can be performed.

In addition, since the wheels of each traveling mechanism are dispersedly arranged at least at three locations in the circumferential direction as viewed from the axial direction, when the hydraulic tester is moved along the tube axis direction, the cylindrical body is a pipe of a fluid pipe. Even when it is slightly rotated around the axis (circumferential direction), it is possible to prevent the hydraulic pressure tester from becoming unstable, such as toppling, and to realize stable movement in the tube axis direction.
Furthermore, each of the wheels of each traveling mechanism is composed of two or more parallel wheels that are arranged in parallel along the axial direction, so that the hydraulic tester is inserted into the fluid pipe and travels. Even when passing through the gap, only one wheel of the plurality of parallel wheels is fitted or caught in the gap, and the other wheels can be kept in contact with the inner peripheral surface of the pipe. Thereby, passage of the clearance gap of a joint part by a hydraulic tester becomes easy.
In particular, since all of the multiple-wheel parallel type wheels that are arranged in parallel along the axial direction are pressed against the inner peripheral surface of the fluid pipe by the urging unit, the hydraulic pressure tester is inserted into the fluid pipe. Even when traveling and passing through the gap of the joint portion, the axial center of the cylindrical body can be more reliably maintained concentric with the tube axis of the fluid pipe. In addition, the entire trolley part is radially outward of the cylindrical body by an urging portion disposed between the trolley part supporting each of the plurality of wheels in parallel and the wheel mounting part of the cylindrical body. By moving and energizing to each other, it is possible to stably press all of the plurality of parallel-type wheels integrally with the inner peripheral surface of the fluid pipe through the entire carriage unit.

  Therefore, the shaft core of the cylindrical body and the tube shaft of the fluid pipe can be maintained in a concentric state quickly and easily, and the water stop state between the pipe inner peripheral surface by the annular water stop means is stabilized and reliably stopped. Water can be done.

Other characteristic feature of the present invention, the wheel of the front Kihashi line mechanism each are in the axial direction as viewed, the cylindrical body in the circumferential direction, respectively at two positions above the upper half side portion and the lower half side portion of the distribution Established,
At least some of the wheels of the wheel that is disposed on the upper half side portion is, in the axial direction as viewed, is disposed at a position symmetrical with respect to a vertical line passing through the axis of the cylindrical body,
At least some of the wheels of the wheel that is disposed on the lower half side portion is, in the axial direction when viewed, comprising disposed to be symmetrical positions with respect to a vertical line passing through the axis of the cylindrical body In the point.

According to the above configuration, since the wheels of each traveling mechanism are dispersedly disposed at two or more locations in the upper half side portion and the lower half side portion in the circumferential direction of the cylindrical body as viewed in the axial direction, these wheels are distributed. Can be distributed in the circumferential direction of the inner peripheral surface of the tube as at least two locations on the upper half side portion and two or more locations on the lower half side portion of the pipe inner peripheral surface.
Further, since some of the wheels in the upper half side part are arranged at positions symmetrical with respect to the normal passing through the axis of the cylindrical main body as viewed in the axial direction, a part of the upper half side part is arranged. The location where the inner circumferential surface of the pipe is pressed by the wheel is symmetrical with respect to the perpendicular, and can be dispersed in the circumferential direction in the upper half of the inner circumferential surface of the pipe. A part or all of the component forces in the direction perpendicular to the perpendicular line and the tube axis of the fluid pipe can be canceled out.
Furthermore, since some of the wheels in the lower half side part are arranged at positions symmetrical with respect to the normal passing through the axis of the cylindrical main body when viewed in the axial direction, a part of the lower half side part is arranged. The location where the inner peripheral surface of the pipe is pressed by the wheel is symmetrical with respect to the perpendicular, and can be dispersed in the circumferential direction at the lower half of the inner peripheral surface of the pipe. A part or all of the component forces in the direction perpendicular to the perpendicular line and the tube axis of the fluid pipe can be canceled out.
Therefore, the tube shaft of the fluid tube and the axial center of the cylindrical main body are reliably maintained concentrically by appropriately dispersing in the circumferential direction the places where the inner surface of the fluid tube is pressed by the wheels of each traveling mechanism. it can.

Other characteristic feature of the present invention, the wheel of the front Kihashi line mechanism each are in the axial direction as viewed, the cylindrical body in the circumferential direction, respectively at two positions above the upper half side portion and the lower half side portion of the distribution Established,
And at least some of the wheels of the wheel that is disposed on the upper half side portion, and at least some of the wheels of the wheel that is disposed on the lower half side portion is, in the axial direction as viewed, the It exists in the point arrange | positioned in the position symmetrical with respect to the axial center of a cylindrical main body.

According to the above feature, the wheels of each traveling mechanism are dispersedly disposed at two or more locations in the upper half side portion and the lower half side portion in the circumferential direction of the cylindrical main body as viewed in the axial direction. Can be distributed in the circumferential direction of the inner peripheral surface of the tube as at least two locations on the upper half side portion and two or more locations on the lower half side portion of the pipe inner peripheral surface.
In addition, since some of the wheels in the upper half portion and some of the wheels in the lower half portion are disposed at positions that are symmetrical with respect to the axis of the cylindrical body in the axial direction view, It is possible to cancel part or all of the reaction force due to the pressing of a part of the wheels in the upper half side part and part or all of the reaction force due to the pressing of a part of the wheels in the lower half side part.
Therefore, the pipe shaft of the fluid pipe and the axial center of the cylindrical body are more reliably concentric by more appropriately dispersing the places where the inner circumferential surface of the fluid pipe is pressed by the wheels of each traveling mechanism in the circumferential direction. Can be maintained.

Other characteristic feature of the present invention moves, between said truck the wheel mounting portion, radially outward side of the cylindrical body previous SL platform car unit for the previous SL vehicle wheel mounting portion lies in moving guide part for freely moving guide is al provided.

According to the above characteristic, the movement urging of the truck by those biasing portion, can be reliably moved and guided in the radially outward side of the cylindrical body by moving the guide unit, the axis of the cylindrical body Can be maintained more concentrically with the tube axis of the fluid tube.

In another characteristic configuration according to the present invention, the urging portion includes at least one of a coil spring and a damper,
Wherein the biasing unit is in point formed by arranging a plurality to correspond to each wheel of said plurality wheel parallel type wheels which are supported by the front Symbol table drive unit.

  According to the above feature, a plurality of urging portions including at least one of a coil spring and a damper are arranged so as to correspond to each wheel of a plurality of parallel wheels that are supported by each carriage unit. In addition to being able to move and urge the whole of each carriage part to the radially outer side of the cylindrical main body by each urging part, the urging part further passes through an uneven part such as a gap on the inner peripheral surface of the fluid pipe. When the wheels of the multiple-parallel wheels are individually moved radially inward or radially outward of the cylindrical main body, and the carriage is tilted with respect to the axis of the cylindrical main body. However, each urging portion provided corresponding to the portion where the wheels are supported in the carriage unit individually expands and contracts, so that the wheels contact the inner peripheral surface of the fluid pipe via the carriage unit. The cylindrical body's radial inner side and radial It can be appropriately moves outward. Therefore, even when the carriage part tilts with respect to the axis of the cylindrical body, the tilting can be absorbed well by the biasing part, and the cylindrical body can be prevented from tilting. Can be maintained more concentrically with the tube axis of the fluid tube.

Other features arrangement according to the invention, between the front Symbol table drive unit and the front SL wheel wheel mounting portion, the inclined regulating to prevent setting angle or tilt in the pitching direction of the carriage section with respect to the wheel mounting portion The point is that a part is provided.

According to the above-described feature, the tilting of a set angle or more in the pitching direction (the direction along the axis of the cylindrical body) of the carriage with respect to the wheel attachment portion is prevented between each carriage portion and each wheel attachment portion. Since the tilt restriction part is provided, even when the urging part arranged between each carriage part and each wheel attachment part expands and contracts, and each carriage part tilts with respect to each wheel attachment part, Tilt more than the set angle of each trolley part can be prevented, and damage to the trolley part and the urging part can be prevented.
In addition, since the tilt of each carriage portion less than the set angle is allowed, the tilt can be absorbed by the urging portion, and the tilt of the cylindrical body can be prevented. It is possible to satisfactorily prevent the eccentricity from the tube axis.

According to another characteristic configuration of the present invention, the annular water blocking means is provided on both sides in the axial direction of the outer peripheral surface of the cylindrical body, and is biased to both sides in 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 pipe inner peripheral surfaces. A projecting tube that protrudes radially inward from the inner peripheral surface of the cylindrical main body at the axial center side, and passes through the inner peripheral surface and the outer peripheral surface of the cylindrical main body; A connecting pipe connectable to the protruding pipe from the side, and configured to be able to supply water for water pressure test from the outside of the fluid pipe into the annular sealed space via the connecting pipe and the protruding pipe.
The protruding tube is also used as an operating rod mounting member capable of operating the cylindrical main body carried into the fluid tube along the axial direction of the fluid tube, and the connecting tube is also used as the operating rod. It is in the point to be done.

According to the above feature, the annular water stop means is provided on both sides in the axial direction of the outer peripheral surface of the cylindrical main body, and the pipe inner peripheral surface is displaced to both sides in the axial direction with respect to the joint portion of the fluid pipe. Since it is composed of a pair of annular water-stopping bags that can be expanded to a water-stopping state between the two, the joint portion is located on the center side in the axial direction of both bag mounting portions of the cylindrical body The outer circumferential surface of both the annular water-stopping bag and the cylindrical main body is operated by expanding the diameter of both annular water-stopping bags and stopping the water by bringing the outer peripheral surface of both annular water-stopping bags into contact with the inner peripheral surface of the fluid pipe. An annular sealed space can be formed by the inner peripheral surface of the fluid pipe. And on the center side in the axial center direction of both bag mounting portions of the cylindrical body, a protruding tube that protrudes radially inward from the inner circumferential surface of the cylindrical body and penetrates the inner circumferential surface and the outer circumferential surface of the cylindrical body. By connecting a connecting pipe from the radially inner side of the cylindrical body and supplying water for water pressure test into the annular sealed space from the outside of the fluid pipe through these protruding pipe and connecting pipe, A water pressure test can be performed on a joint portion of a fluid pipe located in the space.
At this time, the projecting tube is also used as an operating rod mounting member that can drive the cylindrical body carried in the fluid tube along the tube axis direction of the fluid tube, and the connecting tube is also used as the operating rod. Therefore, there is no need to separately provide an operation rod that pushes and pulls the cylindrical main body along the tube axis direction from the outside of the fluid pipe, and a mounting member for this operation rod. The manufacturing cost can be reduced.

Another characteristic configuration according to the present invention is that the protruding tube is disposed in a lower half side portion of the cylindrical main body in the axial direction view.

  According to the above feature, since the projecting tube as the operation rod is disposed in the lower half portion of the cylindrical main body as viewed in the axial direction, the bottom of the cylindrical main body to which the weight of the hydraulic tester is loaded is applied. An operating force in the same direction as the axial center direction can be applied to the half side portion via the projecting tube and the connecting tube, and the cylindrical main body is efficiently run along the tube axis direction with a small operating force in the fluid pipe. be able to.

Sectional view near the joint of a water pipe subject to water pressure test Schematic perspective view of water pressure tester III-III sectional view of the water pressure testing machine in FIG. Rear view of water pressure tester VV partial sectional view of FIG. 4 showing the vicinity of the traveling mechanism of the water pressure tester Partial sectional view showing a state in which a water pressure tester is inserted into a water pipe Rear view of the water pressure tester inserted in the water pipe Sectional view showing the running state of the water pressure tester in the water pipe Explanatory drawing which shows the state through which the wheel of a traveling mechanism passes the clearance gap of the joint part of a water pipe Explanatory drawing which shows the state which expanded the diameter of the annular water stop bag and supplied water for water pressure test in the annular sealed space Partial sectional view showing the vicinity of a traveling mechanism of a hydraulic test machine according to another embodiment

  As shown in FIG. 1, a joint B of a fluid pipe such as a cast iron pipe that is subjected to a water pressure test by the hydraulic pressure testing machine A according to the present invention is, for example, an insertion pipe part of a water pipe P <b> 1 (an example of a fluid pipe). 1 is a joint B that connects the pipe 1 and a receiving pipe 2 of another water pipe P2 (an example of a fluid pipe) fitted and connected thereto in a concentric state with the pipe axis X. In this joint part B, it is possible to seal between the pipe outer peripheral surface of the insertion tube part 1 and the pipe inner peripheral surface 2a of the receiving pipe part 2, and the diameter is expanded radially outward on the pipe inner peripheral surface 2a. An annular synthetic rubber elastic sealing material 4 mounted in the annular elastic sealing material mounting groove 3, and the insertion tube portion 1 and the receiving tube portion 2 move relative to each other along the tube axis X direction. In this case, a connecting means 5 is provided which contacts each other from the direction of the tube axis X and prevents 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 water pressure test on 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. 2 to 4, 10, the hydraulic pressure testing machine A is provided on the inner peripheral surface side of the cylindrical body 10 that can be carried into the water pipes P <b> 1 and P <b> 2 and the joint B of the water pipes P <b> 1 and P <b> 2. In the annular sealed space V formed by the diameter expansion operation of the annular water-stopping means 20 and the annular water-stopping means 20 capable of expanding the diameter to the state of forming the annular sealed space V (see FIG. 10) for the water pressure test. The water supply part 30 (refer FIG.8 and FIG.10) which supplies the water W for water pressure tests, and a pair of traveling mechanism 40 arrange | positioned at the axial center direction both sides of the cylindrical main body 10 are provided.

  Although details will be described later, the annular water blocking means 20 is provided on both sides of the outer peripheral surface 11 of the cylindrical body 10 in the direction of the axis Y with respect to the gap S between the joints B of the water pipes P1 and P2. A pair of annular water-stopping bags 20A that can be expanded to a state in which water is stopped between the pipe inner peripheral surfaces 1a and 2a that are deviated on both sides are provided, and both the annulars that have been expanded in a water-stopped state An annular sealed space V can be formed by the water stop bag 20A, 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. Thereby, 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, and the water pressure is applied. It is possible to inspect (water pressure test) for leakage from the vicinity of the elastic sealing material 4 that realizes the watertight state of the joint B of the water pipes P1 and P2 (see FIG. 10).

Hereinafter, the configuration of each part of the hydraulic pressure tester A will be described.
As shown in FIGS. 2 to 4 and 10, 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 a water pipe. It is formed to be slightly smaller in diameter than the inner diameters of the water pipes P1 and P2 so that they can be carried into the P1 and P2.

As shown in FIGS. 2 to 4, on the outer peripheral surface 11 of the cylindrical main body 10, a pair of bag mounting portions 11 a capable of mounting a pair of annular water blocking bags 20 </ b> A are provided on both sides of the axial Y direction. On the center side in the axis Y direction of the bag mounting part 11a, the main body side flanges 11b that define the maximum insertion position in the axis Y direction of the annular water-stopping bag 20A that is sheathed from the end side are formed to protrude to the outer diameter side. Has been.
In addition, on the outer peripheral surface 11, a projecting pipe 31 of the water supply part 30 and an attachment part 11 e of the exhaust pipe 34 are formed on the center side in the axis Y direction of the main body side flange 11 b.
Further, 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 described later, and the blocking body side flange 12A abuts from the axis Y direction. A step portion 11c that defines the maximum insertion position of the annular movement blocking body 12 is formed, and a blocking body fitting portion in which the annular movement blocking body 12 can be externally fitted to the end portion in the axis Y direction from the step portion 11c. 11d is formed.
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.

  The cylindrical main body 10 is made of a metal (in this embodiment, made of aluminum) and includes a hollow annular movement prevention body 12 that is hollow, and the circular movement prevention body 12 includes a cylindrical main body from both ends of the cylindrical main body 10. 10 on the outer peripheral surface 11 of the blocking body side portion protruding to the outer diameter side at the portion facing the annular water blocking bag 20A in the axial Y direction in a state where the blocking member fitting portions 11d are detachably fitted on the outer peripheral surface 11 respectively. A portion 12A 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 blocking body side flange 12A comes into contact with the step portion 11c from the axis Y direction and the maximum insertion position of the annular movement blocking body 12 is reached. Are defined, and a plurality of insertion holes 12a (six in this embodiment) penetratingly formed from the inner diameter side to the outer diameter side of the annular movement blocking body 12 are a plurality of insertion holes 11f of the blocking body fitting portion 11d. Is aligned with the position that matches. 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.

As shown in FIGS. 2 and 3, the annular water-stopping bag 20 </ b> A is made of rubber made of EPDM (ethylene-propylene-diene rubber), and in a reduced diameter state, the cross-sectional shape is formed linearly with the inner diameter portion being linear. The outer diameter portion is formed into a substantially corrugated shape in which both end portions and the central portion in the axis Y direction bulge to the outer diameter side, and a portion between both end portions and the central portion is recessed toward the inner diameter side. That is, the inner diameter of the inner diameter portion of the annular water blocking bag 20 </ b> A in the reduced diameter state is formed to be substantially the same as or slightly larger than the outer diameter of both bag mounting portions 11 a on the outer peripheral surface 11 of the cylindrical body 10. The outer diameter is smaller than the outer diameters of the main body side collar 11b and the blocking body side collar 12A in a state of being mounted in the mounting recess 18 formed between the main body side collar 11b and the blocking body side collar 12A. Or it is set equivalently.
On the other hand, as shown in FIG. 10, the annular water blocking bag 20 </ b> A has a cross-sectional shape in which the inner diameter portion is linearly formed and the outer diameter portion in the expanded diameter state in which compressed air (an example of a fluid) is injected. Is formed in a substantially arc shape in which both end portions and the central portion in the axis Y direction and a portion between both end portions and the central portion bulge to the outer diameter side than the outer diameter in the reduced diameter state. An injection fitting 21 for injecting compressed air from the in-bag injection pipe 33 into the annular water stop bag 20A is attached to the inner diameter portion of both the annular water stop bags 20A.

The in-bag infusion tube 33 is formed to project from the radially outward side of the cylindrical body 10 to the radially inward side and communicated with each of the infusion fittings 21 (not shown). And a communication pipe part (not shown) for connecting the pair of radial pipe parts in communication with each other, a rear end part of the communication pipe part (in the axial Y direction, the rear end side of the cylindrical main body 10 (FIG. 3). And a plurality of extension pipe portions (not shown) that can be added sequentially as the cylindrical main body 10 is inserted into the water pipes P1 and P2.
Further, both bag mounting portions 11 a of the cylindrical body 10 are respectively formed with bag mounting openings 17 penetrating from the inner diameter side to the outer diameter side and opening downward, and the injections inserted through the bag mounting openings 17. The communication pipe portion of the in-bag injection pipe 33 is airtightly connected to the metal fitting 21. Accordingly, compressed air (not shown) from a compressed air supply unit (not shown) is supplied into the annular water-stopping bag 20A via the in-bag injection pipe 33, the injection fitting 21 and the bag attachment opening 17, The annular water blocking bag 20A is expanded from the reduced diameter state to a diameter expanded state, or compressed air is sucked from the annular water blocking bag 20A and the diameter decreased from the expanded diameter state to the reduced diameter state. It is configured to be possible.

As shown in FIG. 3 and FIG. 10, a water injection opening 15 that penetrates from the inner diameter side to the outer diameter side and opens downward is formed in the attachment portion 11 e of the cylindrical main body 10, and the inner diameter side of the water injection opening 15 A protruding tube 31 that protrudes radially inward from the inner peripheral surface of the attachment site 11e and penetrates the inner and outer peripheral surfaces of the attachment site 11e is connected in a watertight manner, and from the inner diameter side to the outer diameter side. An exhaust opening 16 penetrating and opening upward is formed. The exhaust opening 16 protrudes radially inward from the inner peripheral surface of the mounting portion 11e on the inner diameter side of the exhaust opening 16 and the inner peripheral surface and outer peripheral surface of the mounting portion 11e. Are connected in an airtight manner. A connecting pipe 32 is connected to the protruding pipe 31 from the radially inner side of the attachment site 11e along the axis Y direction. The connecting pipe 32 has a cylindrical main body 10 in the water pipes P1 and P2. It is composed of a plurality of additional connecting pipe portions that can be added sequentially as they are inserted into the connector. The exhaust pipe 34 is also composed of a plurality of additional exhaust pipe portions that can be added sequentially as the cylindrical main body 10 is inserted into the water pipes P1 and P2.
Therefore, water W for water pressure test from the water supply unit 30 is supplied into the annular sealed space V through the connection pipe 32, the protruding pipe 31 and the water injection opening 15, and the air Q present in the annular sealed space V is present. (In some cases, water W) can be exhausted to the outside through the exhaust opening 16 and the exhaust pipe 34. The water injection opening 15 and the exhaust opening 16 are arranged at positions (upper and lower parts in the circumferential direction) facing each other on a perpendicular line including the axis Y of the cylindrical body 10.

The configuration of each part of the hydraulic pressure tester A will be further described.
As shown in FIGS. 2 to 6, the pair of travel mechanisms 40 that allow the cylindrical main body 10 to travel along the direction of the pipe axis X in the water pipes P <b> 1 and P <b> 2 are provided on both sides of the cylindrical main body 10 in the axis Y direction. It is arranged in the part. Further, as will be described in detail later, each traveling mechanism 40 includes a plurality of parallel-type wheels 42 that are dispersedly arranged at four locations in the circumferential direction of the cylindrical main body 10 as viewed in the axial direction Y.

  Each traveling mechanism 40 includes a wheel mounting portion 41 that is detachably fixed to the cylindrical main body 10, a cart portion 43 that supports a plurality of parallel wheels 42, and a cart portion 43 that is cylindrical with respect to the wheel mounting portion 41. The movement guide part 44 that moves and guides the outer side in the radial direction of the cylindrical body 10, and the entire carriage part 43 between the carriage part 43 and the wheel mounting part 41 are radially outward of the cylindrical body 10. Coil spring 45 (an example of an urging portion) disposed in a state of being urged to move to the wheel, and provided between the trolley portion 43 and the wheel mounting portion 41, and the pitching direction of the trolley portion 42 with respect to the wheel mounting portion 41 And an inclination restricting portion 46 that prevents tilting beyond the set angle in the (axis Y direction).

  The wheel mounting portion 41 has a circular arc portion 41A formed in an arc shape when viewed in the axis Y direction, and a plate in a direction away from the arc portion 41A in the axis Y direction from both ends of the arc of the arc portion 41A. And a pair of extending portions 41B extending in a shape. In this embodiment, each traveling mechanism 40 of the pair of traveling mechanisms 40 includes a pair of upper and lower wheel mounting portions 41, and each wheel mounting portion 41 has one arc portion 41A and an extending portion 41B. There are two.

  The arc portion 41A is formed to have the same curvature as the curvature of the inner peripheral surface at both ends of the cylindrical main body 10 in the axis Y direction, and from the radially outer side to the radially inner side in the central portion of the arc. A through-hole 41C is formed to penetrate therethrough. As a result, the wheel mounting portion 41 has the insertion hole of the annular movement blocking body 12 described above in a state where the outer peripheral surface of the arc portion 41A is in contact with the inner peripheral surface of the end portion of the cylindrical main body 10 in the axis Y direction. 12a and the bolt 13 inserted through the insertion hole 11f of the blocking body fitting portion 11d of the cylindrical body 10 are also inserted into the through hole 41C of the arc portion 41A, and these are integrally fixed by the nut 14. Thus, the cylindrical body 10 is fixed. In a state where the arc portion 41A is fixed to the cylindrical main body 10, the extending portion 41B is configured to extend outward from the end portion of the cylindrical main body 10 along the axis Y direction.

  The extending portion 41B is formed with a through hole 41D penetrating from the radially outer side to the radially inner side in the central portion in the axial center Y direction, and on both sides of the through hole 41D than the through hole 41D. A small-diameter guide hole 41E is formed.

The number of the cart portions 43 corresponding to each of the extending portions 41B (four in each traveling mechanism 40 in this embodiment) is provided, and the main body portion 43a made of a plate-like member and the main body portion 43a And a plurality of wheels 42 in parallel with each other that are supported radially outward. The main body 43a is formed with a through hole 43A penetrating from the radially outer side to the radially inner side in the central portion in the axial center Y direction, and the through hole 43A is formed on the radially inner surface of the main body 43a. On both sides, recesses 43B (see FIG. 5) having a smaller diameter than the through-holes 43A are formed.
Moreover, the multiple-wheel parallel type wheel 42 is configured by a two-wheel parallel type wheel 42 including two wheels 42a that are arranged in parallel along the axis Y direction, and each wheel 42a has an axis as viewed in the axis Y direction. Bolts and nuts (not shown) via brackets (not shown) on the radially outer side of the main body 43a while being rotatably supported around a rotation axis parallel to the tangential direction of a circle centered on Y. (Not shown). Each wheel 42a is fixed so as to be positioned on the radially outer side of the recess 43B of the main body 43a. Each traveling mechanism 40 of the pair of traveling mechanisms 40 is provided with eight wheels 42a.

As shown in FIG. 5, a pair of the carriage body 43 and the extension part 41B in the radial direction of the cylindrical main body 10 spans a recess 43B of the carriage part 43 and a guide hole 41E of the extension part 41B. The coil spring 45 is disposed, and is configured so as to move and urge the entire carriage portion 43 toward the radially outward side with respect to the extending portion 41B.
Specifically, a rod-like shaft portion 45a having a diameter slightly smaller than the inner diameter of the recess 43B and the guide hole 41E is inserted into the coil spring 45 and an annular washer 45b having a diameter larger than the inner diameter of the guide hole 41E, and the shaft portion 45a. And one end of the coil spring 45 is abutted and supported on the bottom of the recess 43B, and the annular washer 45b abutted on the other end of the coil spring 45 is brought into contact with the radially outer surface of the extension 41B. In this state, the other end side of the shaft portion 45a is inserted into the guide hole 41E. Thereby, with the expansion and contraction of the coil spring 45, the carriage portion 43 is configured to be movable radially inward and radially outward with respect to the extending portion 41B.

  Further, the cart portion 43 and the extending portion 41B of the wheel mounting portion 41 located on the radially inner side of the cart portion 43 extend from the through hole 43A of the cart portion 43 to the through hole 41D of the extending portion 41B. The inserted bolt 47 is connected to the bolt 47 by a nut 48 screwed into the extending portion 41B. Therefore, the relative distance in the radial direction between the carriage portion 43 and the extension portion 41B is wider than the predetermined interval due to the contact between the head of the bolt 47 and the carriage portion 43 and the contact between the nut 48 and the extension portion 41B. On the other hand, if it is within the predetermined interval, it can be appropriately increased or decreased radially outward or radially inward. The predetermined interval can also be adjusted by adjusting the screwing position of the nut 48 to the bolt 47.

  Then, the screwing position between the bolt 47 and the nut 48 is adjusted as appropriate, and each coil spring 45 is appropriately compressed between the annular washer 45b and the recess 43B (the coil spring 45, the shaft portion 45a and the circle 45). The compression state is such that the annular washer 45b is not detached. In a state where each coil spring 45 is compressed, the radially outward side of each wheel 42 a is more than the main body side flange 11 b on the outer peripheral surface 11 of the cylindrical main body 10 and the blocking body side flange 12 A of the annular movement blocking body 12. It is located on the radially outer side, and is further configured to be located on the radially outer side than the inner diameters of the pipe inner peripheral surfaces 1a, 2a of the water pipes P1, P2 to be inserted.

  Thereby, when the water pressure tester A is inserted into the water pipes P1 and P2, each coil spring 45 moves and urges each wheel 42a to the radially outer side of the cylindrical main body 10 to supply the water pipes P1 and P1. It is comprised so that it can contact | abut to the pipe | tube inner peripheral surfaces 1a and 2a of P2, and in this case, it inserts into the shaft part 45a inserted in the guide hole 41E and the said guide hole 41E, and 43 A of through-holes, and 43 A of through-holes. The bolt 47 is provided between the carriage part 43 that supports each two-wheel parallel type wheel 42 and the wheel attachment part 41 of the cylindrical main body 10, and each carriage part 43 is cylindrical with respect to each wheel attachment part 41. A moving guide portion 44 that is movably guided to the outer side in the radial direction of the cylindrical main body 10, and a pitching of the carriage portion 43 with respect to the wheel attachment portion 41 provided between each carriage portion 43 and each wheel attachment portion 41. Direction (axis Y direction) Functions as the inclined restricting portion 46 to prevent the set angle or tilt.

The arrangement of the extending part 41B of the wheel attachment part 41 and the carriage part 43 in each traveling mechanism 40, in particular, the arrangement of the two-wheel parallel type wheels 42 supported by the carriage part 43 will be described.
In each traveling mechanism 40, four extending portions 41 </ b> B and four cart portions 43 of the wheel mounting portion 41 are provided in the circumferential direction of the cylindrical main body 10 as viewed in the axis Y direction, and as described above, A two-wheel parallel type wheel 42 is supported on each carriage unit 43.

The two-wheel parallel type wheel 42 is disposed at two positions on the upper half side portion and the lower half side portion in the circumferential direction of the cylindrical main body 10 as viewed in the axial Y direction. The two-wheel parallel type wheel 42 disposed in the upper half side portion is symmetric with respect to a perpendicular passing through the axis Y of the cylindrical main body 10 as viewed in the direction of the axis Y (in the present embodiment, the perpendicular line). The two-wheel parallel type wheel 42 disposed in the lower half side portion is disposed at a position inclined by 30 ° with respect to the axial center Y of the cylindrical main body 10 when viewed in the axial direction Y. Are arranged at positions that are symmetric with respect to a perpendicular passing through (in this embodiment, a position inclined at 30 ° with respect to the perpendicular).
Furthermore, the two-wheel parallel type wheel 42 disposed in the upper half side portion and the two-wheel parallel type wheel 42 disposed in the lower half side portion are the shafts of the cylindrical main body 10 as viewed in the axis Y direction. It is disposed at a position that is symmetric with respect to the core Y.

  Next, a procedure for carrying the water pressure tester A into the water pipes P1 and P2 and performing a water pressure test on the joint B will be described.

As shown in FIG. 6, for example, the water pressure tester A is inserted into the water pipe P1 from the receiving pipe part (not shown) opposite to the end where the insertion pipe part 1 of the water pipe P1 is formed. To do.
At this time, first, each wheel 42a on the front side among the two-wheel parallel type wheels 42 in the traveling mechanism 40 disposed on the side portion on the insertion tip side in the axis Y direction of the cylindrical main body 10 (in this embodiment, the circumferential side Four wheels in the direction) are slightly inserted into the receiving pipe portion of the water pipe P1 and brought into contact with the pipe inner peripheral surface 1a of the water pipe P1, and the cylindrical main body 10 is supplied with water using these wheels 42a as insertion guides. It pushes along the pipe-axis X direction of the pipe P1, and each wheel 42a of the back side among the wheels 42 of the said each traveling mechanism 40 is similarly pushed in in the water pipe P1. Subsequently, among the two-wheel parallel type wheels 42 in the traveling mechanism 40 disposed on the side portion on the rear end side of the insertion, the cylindrical main body 10 is further brought into contact with the inner peripheral surface 1a of the front side wheel 42a and the water pipe P1. The wheel 42a on the rear side among the wheels 42 of each traveling mechanism 40 is similarly pushed into the water pipe P1. Thereby, the water pressure tester A can be smoothly inserted into the water pipe P1.

As shown in FIG. 7, after inserting the water pressure tester A into the water pipe P <b> 1 in this way, the wheels 42 a constituting the two-wheel parallel type wheel 42 of each traveling mechanism 40 are cylindrical by the coil spring 45. The main body 10 is urged to move outward in the radial direction, and is always in contact with the inner peripheral surface 1a of the water pipe P1 and pressed with a predetermined pressure. For this reason, the space | interval in the radial direction of the outer peripheral surface 11 of the cylindrical main body 10 and the pipe inner peripheral surface 1a of the water pipe P1 is comprised so that it may become uniform or substantially uniform in the circumferential direction automatically. That is, by the biasing of each wheel 42a by the coil spring 45, the axis Y of the cylindrical body 10 and the tube axis X of the water pipe P1 can be automatically maintained in a concentric state.
In particular, the locations where the inner circumferential surface 1a is pressed by the respective wheels 42a are at least two locations on the upper half side portion and the lower half side portion of the inner circumferential surface 1a as viewed in the axial Y direction. It can be dispersed in the circumferential direction. Further, the position where the pipe inner peripheral surface 1a is pressed by the wheel 42a in the upper half side portion can be distributed in the circumferential direction in the upper half side portion of the pipe inner peripheral surface 1a as a position symmetric with respect to the vertical line. Of the reaction force caused by the pressing of each wheel 42a at the half-side portion, substantially all of the component forces in the direction perpendicular to the vertical line and the pipe axis X of the water pipe P1 (the left-right direction in FIG. 7) can be canceled. Furthermore, the pressing part of the pipe inner peripheral surface 1a by the wheel 42a in the lower half side part can be distributed in the circumferential direction in the lower half side part of the pipe inner peripheral face 1a as a position symmetrical to the perpendicular, Of the reaction force caused by the pressing of the wheel 42a at the half side portion, substantially all of the component forces in the direction perpendicular to the vertical line and the pipe axis X of the water pipe P1 (the left-right direction in FIG. 7) can be canceled. Furthermore, substantially all of the reaction force due to the pressing of the wheel 42a in the upper half side portion and substantially all of the reaction force due to the pressing of the wheel 42a in the lower half side portion can be offset.
Therefore, the pipe axis X of the water pipe P1 is more appropriately dispersed in the circumferential direction by pressing the places where the pipe inner peripheral surface 1a of the water pipe P1 is pressed by the wheels 42a constituting the two-wheel parallel type wheel 42 in each traveling mechanism 40. And the axial center Y of the cylindrical main body 10 can be reliably maintained concentrically.

  As shown in FIG. 8, the cylindrical body 10 has a projecting pipe 31 of a water supply portion 30 connected to a water injection opening 15 disposed at a lower portion of the attachment portion 11 e of the cylindrical body 10 of the hydraulic pressure testing machine A. The connecting pipe 32 is connected along the axial center Y of the cylindrical main body 10 from the radially inner side. By pressing the connection pipe 32 in the tube axis X direction, the hydraulic pressure testing machine A is caused to travel toward the vicinity of the joint B along the tube axis X direction via the cylindrical main body 10. Therefore, the projecting pipe 31 is also used as a mounting member for an operating rod capable of operating the cylindrical main body 10 carried into the water pipes P1, P2 along the direction of the pipe axis X of the water pipes P1, P2. 32 is also used as the operation rod. Further, the connection pipe 32 is constituted by a plurality of additional connection pipe portions that can be sequentially added along the axis Y direction, and a wheel 32a is disposed in the lower portion of each additional connection pipe portion. Is supported in contact with the pipe inner peripheral surface 1a of the water pipe P1, and the connecting pipe part itself can be smoothly run while the cylindrical body 10 is reliably inserted into the water pipes P1 and P2. Can be done. Thereby, there is no need to separately provide an operating rod for driving the cylindrical body 10 by pushing and pulling it from the outside of the water pipes P1 and P2 along the direction of the tube axis X, and a simple configuration without the need to provide a mounting member for this operating rod. The manufacturing cost can be reduced. At this time, the outer diameter portion (the outer diameter side tip portion) of the annular water blocking bag 20A 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, It will be in the state accommodated reliably in the mounting | wearing recessed part 18, and it will not contact the pipe | tube inner peripheral surface 1a, 2a of water pipe P1, P2, and damage to 20 A of annular water stop bags is prevented.

  Next, as shown to Fig.9 (a), in the state which each wheel 42a of the front side and the back side among the two-wheel parallel type wheels 42 in each traveling mechanism 40 contact | abutted to the pipe inner peripheral surface 1a of the water pipe P1. The axial center Y of the cylindrical main body 10 and the pipe axis X of the water pipe P1 are kept concentric, and are supported by the extending portion 41B of the wheel mounting portion 41, the main body portion 43a of the carriage portion 43, and the main body portion 43a. Among the two-wheel parallel type wheels 42, the respective wheels 42a also maintain a state parallel to the axis Y and the tube axis X.

  Subsequently, as shown in FIG. 9B, among the two-wheel parallel type wheels 42 in each traveling mechanism 40, each wheel 42 a on the front side passes through the gap S in the joint portion B, and the inside of the gap S in the radial direction. When positioned on the side, each coil spring 45 corresponding to each wheel 42a on the front side extends, and each coil spring 45 corresponding to each wheel 42a on the rear side slightly contracts, so that the main body portion of the carriage unit 43 43a is slightly inclined in a front-down manner with respect to the axis Y and the tube axis X direction. In this state, the rear wheels 42a located behind the front wheels 42a are in contact with the pipe inner peripheral surface 1a of the water pipe P1. Therefore, when the main body portion 43a of the carriage portion 43 is inclined, the axial center Y of the cylindrical main body 10 and the pipe axis X of the water pipe P1 can be maintained concentric by the expansion and contraction of each coil spring 45. it can.

Thereafter, when each wheel 42a on the rear side abuts on the pipe inner peripheral surface 1a of the water pipe P1 and each wheel 42a on the front side passes through the gap S and contacts the front side of the gap S, The coil spring 45 corresponding to each wheel 42a contracts and gets over the front side, and each wheel 42a on the front side is pressed against the pipe inner peripheral surface 2a of the water pipe P2.
And as shown in FIG.9 (c), when each said wheel 42a of the said back side passes the clearance gap S and is located in the radial direction inner side of the said clearance gap S, each corresponding to each wheel 42a of the said back side As the coil spring 45 extends, each coil spring 45 corresponding to each wheel 42a on the front side slightly contracts, so that the main body portion 43a of the carriage portion 43 is lowered rearward with respect to the axis Y and the tube axis X direction. Slightly inclined. In this state, the front wheels 42a located in front of the rear wheels 42a are in contact with the pipe inner peripheral surface 2a of the water pipe P2.

  Therefore, when the main body portion 43a of the cart portion 43 is inclined, the axial center Y of the cylindrical main body 10 and the pipe axis X of the water pipe P2 are maintained concentric by the expansion and contraction of each coil spring 45. . Thereafter, when each wheel 42a on the front side abuts the pipe inner peripheral surface 2a of the water pipe P2 and each wheel 42a on the rear side passes through the gap S and contacts the front side of the gap S, The coil spring 45 corresponding to each wheel 42a contracts and gets over the front side, and the rear wheel 42a is pressed against the pipe inner peripheral surface 2a of the water pipe P2.

  When the main body portion 43a of the cart portion 43 is inclined, the main body portion 43a is connected to the male screw shaft (not shown) of the bolt 47 and the wheel mounting portion 41 inserted into the through hole 43A of the main body portion 43a. Is set in the pitching direction (axial Y direction) with respect to the extending portion 41B of the wheel mounting portion 41 by the shaft portion 45a inserted through the guide hole 41E of the extending portion 41B. The tilting is less than the set angle while allowing the tilting less than that. For example, even when the main body 43a is tilted with respect to the extending portion 41B of the wheel mounting portion 41, the main body 43a and the extending portion 41B are not in contact with each other, and the coil spring 45 is The angle is set so as not to break or leave.

  Thus, in addition to the fact that each of the cart portions 43 can be moved and urged outward in the radial direction of the cylindrical main body 10 by the two coil springs 45 provided on each cart portion 43, a water pipe is further provided. When passing through the concave and convex portions such as the gap S and the lining layer on the pipe inner peripheral surfaces 1a and 2a of P1 and P2, the wheels 42a of the two-wheel parallel wheels 42 are arranged on the radially inner side of the cylindrical body 10 or Even when the trolley part 43 is individually moved radially outward and tilted with respect to the axis Y of the cylindrical main body 10, the trolley part 43 is provided corresponding to a portion where each wheel 42 a is supported. In addition, each coil spring 45 individually expands and contracts, so that each wheel 42a is individually cylindrical so as to be in contact with the pipe inner peripheral surfaces 1a and 2a of the water pipes P1 and P2 via the carriage portion 43. Radially inward of the main body 10 and It can be properly moved in the outward side. Therefore, even when the carriage unit 43 tilts with respect to the axis Y of the cylindrical main body 10, the tilt is satisfactorily absorbed by the coil spring 45, and the cylindrical main body 10 can be prevented from tilting. The axis Y of the main body 10 can be reliably maintained concentric with the pipe axis X of the water pipes P1 and P2.

  Therefore, each wheel 42a of the traveling mechanism 40 disposed on the side portion on the insertion distal end side in the axis Y direction of the cylindrical main body 10 is dropped into the joint portion B of the water pipes P1 and P2 by the traveling operation by the connecting pipe 32. Both sides of the joint B of the annular water-stopping bag 20A in the pipe axis X direction during traveling operation, through the joint B, and after passing through the joint B. When arranged on the side, the axial center Y of the cylindrical body 10 of the water pressure tester A and the tube axis X of the water pipes P1, P2 can be reliably and easily maintained concentrically.

  Next, as shown in FIG. 10, the compressed air from the in-bag injection tube 33 is injected into the two annular water-stopping bags 20 </ b> A from the inner diameter side through the injection fitting 21. Accordingly, both the annular water blocking bags 20A efficiently expand to the outer diameter side with only the outer diameter portion having directivity without substantially expanding the inner diameter portion and both ends in the axis Y direction. Between the pipe inner peripheral surfaces 1a and 2a that are displaced to both sides in the axial Y direction with respect to the joint portion B of the water pipes P1 and P2 on both sides of the outer peripheral surface 11 of the cylindrical body 10 in the axial Y direction. Of the two annular water-stopping bags 20A and the outer peripheral surface 11 of the cylindrical body 10 and the inner peripheral surfaces 1a and 2a of the water pipes P1 and P2 that have been expanded to the water-stopping state. An annular sealed space V can be formed.

  Subsequently, in a state where the diameters of both the annular water-stopping bags 20A are expanded to the water-stopping state, both the circular water-stopping bags 20A, the outer peripheral surface 11 of the cylindrical main body 10, and the pipe inner peripheral surfaces 1a and 2a of the water pipes P1 and P2 The water W for water pressure test is supplied and filled from the protruding pipe 31 and the connecting pipe 32 of the water supply unit 30 into the annular sealed space V formed by the above, while the annular sealed space V is passed through the exhaust pipe 34. To exhaust the air Q. 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.

  Therefore, when the diameter of both the annular water-stopping bags 20A is expanded to the water-stopping state, the distance between the outer peripheral surface 11 of the cylindrical main body 10 and the inner peripheral surfaces 1a and 2a of the water pipes P1 and P2 is automatically increased. It becomes uniform or substantially uniform in the direction, and the axial center Y of the cylindrical main body 10 and the pipe axis X of the water pipes P1 and P2 are automatically maintained concentrically by the urging force of each wheel 42a by each coil spring 45. Therefore, the pipe inner peripheral surfaces 1a and 2a of the water pipes P1 and P2 can be uniformly pressed in the circumferential direction by the two annular water blocking bags 20A, and the outer peripheral surface of the two annular water blocking bags 20A and the water pipes P1 and P2 It is possible to stabilize the water stop state between the pipe inner peripheral surfaces 1a and 2a and perform reliable water stop.

  After the inspection is completed, the compressed air in the annular water-stopping bag 20A is discharged through the in-bag injection tube 33, the annular water-stopping bag 20A is reduced in diameter, and the water pressure tester A runs in the water pipes P1 and P2. Operate and carry out.

[Another embodiment]
(A) In the above embodiment, the coil spring 45 as the urging portion is arranged so as to individually correspond to each wheel 42a of the two-wheel parallel type wheel 42. For example, as shown in FIG. The spring 45 may be disposed so as to correspond to the carriage unit 43 that supports the two-wheel parallel type wheel 42.
Specifically, a through hole 41D penetrating from the radially outer side to the radially inner side is formed in the central portion in the axial center Y direction in the extending portion 41B of the wheel mounting portion 41, and the through hole 41D Guide holes 41E having a smaller diameter than the through hole 41D are formed on both sides in the axis Y direction. The through hole 41D is formed to have an inner diameter through which the bolt 47 can be inserted, but a portion on the radially outer side of the extending portion 41B in the through hole 41D forms a slightly large step portion 41F through which the coil spring 45 can be inserted. Then, one end side of the coil spring 45 in a state in which the bolt 47 is inserted through the stepped portion 41F is abutted and supported.
On the other hand, a through-hole 43A that penetrates from the radially outer side to the radially inner side is formed in the main body portion 43a of the carriage portion 43 in the central portion in the axis Y direction, and the through-hole 43A is inserted through the bolt 47. The inner diameter portion of the through hole 43A on the radially inner side of the main body portion 43a forms a slightly larger step portion 43C into which the coil spring 45 can be inserted, and a bolt 47 is formed on the step portion 43C. The other end side of the coil spring 45 in a state where the is inserted is contacted and supported.
Further, on the both sides of the through hole 43A (stepped portion 43C) in the axial center Y direction on the radially inner surface of the main body 43a, the radially inner side is located at a position corresponding to the guide hole 41E of the extending portion 41B. The shaft part 45a is fixed in a state of projecting to the side, the bolt 47 is inserted through the through hole 43A of the main body part 43a and the through hole 41D of the extension part 41B, and both the shaft parts 45a are inserted into both guide holes 41E. In this state, the nut 48 is screwed onto the bolt 47 and tightened.
Thereby, it can be set as the structure which carries out the movement urging | biasing of the trolley | bogie part 43 which supports the two-wheel parallel type | mold wheel 42 in each traveling mechanism 40 to the radial direction outer side of the cylindrical main body 10 with one coil spring 45. Further, when the main body 43a of the above-described carriage part 43 is inclined, the main body 43a is connected to the male screw shaft (not shown) of the bolt 47 and the wheel mounting part 41 inserted through the through hole 43A of the main body 43a. The shaft portion 45a inserted through the guide hole 41E of the extending portion 41B is guided in the radial direction, and in addition to the extending portion 41B of the wheel mounting portion 41 due to expansion and contraction of the coil spring 45, the pitching direction (axis Y While the tilt is less than the set angle in the direction), it is restricted so as not to tilt more than the set angle.

(B) In the said embodiment, although the energizing part was comprised by the coil spring 45, each wheel 42a is moved and energized to the radial direction outer side of the cylindrical main body 10, and the pipe inner peripheral surface 1a of the water pipes P1 and P2 , 2a, and other configurations can be adopted as long as the tube axis X of the water pipes P1, P2 and the axis Y of the cylindrical body 10 can be maintained concentrically. For example, a damper can be used.

(C) In the above-described embodiment, the wheels of each traveling mechanism 40 are configured by two-wheel parallel type wheels 42 that are arranged in parallel in the axis Y direction. You may comprise by the wheel of a type | mold, and it is good also as a structure which arrange | positions only one wheel.
Moreover, in the said embodiment, each wheel 42a (four places in the circumferential direction) of the front side in the two-wheel parallel type wheel 42 of each traveling mechanism 20 is disposed at the same position in the axis Y direction (of the water pipes P1 and P2). The rear wheels 42a (four places in the circumferential direction) are arranged at the same position in the axis Y direction (on the same cross section of the water pipes P1 and P2). Arranged to be located). However, if the axial center Y of the cylindrical main body 10 can be maintained concentrically with the pipe axis X of the water pipes P1 and P2, each wheel 42a on the front side is relatively back and forth in the axial Y direction. Alternatively, the rear wheels 42a can be shifted relative to each other in the axial direction Y. Thereby, it can prevent favorably that each wheel 42a on the front side and each wheel 42 on the rear side are fitted into the gap S formed in the joint portion B of the water pipes P1, P2.

(D) In the above embodiment, the two-wheel parallel type wheel 42 of each traveling mechanism 40 is arranged in four locations in the circumferential direction. However, the inside of the water pipes P1, P2 can be favorably traveled and is cylindrical. If it is the structure which can maintain the axial center Y of the main body 10 and the pipe axis X of the water pipes P1 and P2 in a concentric state, the two-wheel parallel type | mold wheel 42 will be three places or five places in the circumferential direction. It is good also as a structure arrange | positioned above.
Moreover, in the said embodiment, although the two-wheel parallel type | mold wheel 42 was arrange | positioned two places in the upper half side site | part and two places in the lower half side site | part by axial core Y direction view, The shaft core Y of the cylindrical body 10 and the pipe axis X of the water pipes P1, P2 can be maintained concentrically (at least three locations in the circumferential direction). For example, the number of arrangements in the upper half part and the number of arrangements in the lower half part can be appropriately changed.
Furthermore, in the said embodiment, the wheel 42a of the upper half side site | part is arrange | positioned in the position symmetrical with respect to a perpendicular in the circumferential direction seeing the axial center Y direction, and the wheel 42a of the lower half side site | part is with respect to a perpendicular. The wheel 42a in the upper half portion and the wheel 42a in the lower half portion are arranged at positions that are symmetric with respect to the axis Y, in addition to such an arrangement. It is good also as a structure which arrange | positions the wheel 42a additionally to one or both of a half side site | part and a lower half site | part. In addition, regardless of such an arrangement, only the wheel 42a in the upper half portion is arranged at a position that is symmetric with respect to the vertical line, or only the wheel 42a in the lower half portion is arranged at a position that is symmetric with respect to the perpendicular line. The wheel 42a can also be arranged so as not to be symmetric with respect to these normals. In addition, when arrange | positioning in the position symmetrical with respect to a perpendicular as mentioned above, the angle made with respect to a perpendicular can be changed suitably.

(E) In the above embodiment, each traveling mechanism 40 is provided with a pair of upper and lower wheel attachment portions 41 and a pair of upper and lower arc portions 41a of the wheel attachment portion 41. However, the arc portion 41a is configured in an annular shape, The wheel mounting part 41 and the arc part 41a can also be constituted by one annular member.

(F) In the above embodiment, the annular water-stopping bag 20A as the annular water-stopping means is arranged on the outer peripheral surfaces 11 at both ends of the cylindrical body 10 in the axial center Y direction. The cylindrical body 10 is constituted by an elastic cylinder provided in the central portion of the outer peripheral surface 11 in the axis Y direction. The diameter of the elastic cylinder is increased, and the outer peripheral surface of the elastic cylinder subjected to the diameter expansion is operated. It is good also as a structure which seals the clearance gap S of the joint part B of the water pipes P1 and P2 and forms the annular sealed space V by the outer peripheral surface of the elastic cylinder and the pipe inner peripheral surfaces 1a and 2a of the water pipes P1 and P2. Further, the above-described annular water-stopping bag 20A is arranged on one end side of the outer peripheral surface 11 of the cylindrical main body 10 in the axial center Y direction, and a water pressure tester A including such a cylindrical main body 10 is used as a pair. It is good also as a structure which carries out diameter-expansion operation of the annular water stop bag 20A of a pair of hydraulic testing machine A in the state inserted from each of the pipes P1 and P2 and arrange | positioned in the upstream and downstream of the joint part B.

(G) In the said embodiment, although compressed air was inject | poured in 20A of annular water stop bags, 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.

(H) In the said embodiment, the water pipe P1 and the water pipe P2 are made into a fluid pipe, and the watertight state of the elastic sealing material 4 in the fitting connection part of the insertion pipe part 1 and the receiving pipe part 2 as a joint part B is used. 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.

(I) In the above embodiment, the water pressure tester A performs the water pressure test of the joint B that connects the water pipe P1 and the water pipe P2 with the same pipe axis X, but the water pipe P1 and the water pipe Even when P2 is slightly bent at the joint portion B, the water pressure test of the joint portion B can be performed by the hydraulic pressure testing machine A provided with the pair of annular water blocking bags 20A. That is, with respect to the water pipe P2 located on the insertion tip side from the joint part B, each wheel 42 disposed at three or more locations in the circumferential direction in the traveling mechanism 40 located on the insertion tip side is caused by the urging part. The pipe inner peripheral surface 2a of P2 is uniformly moved and urged in the circumferential direction so that the pipe shaft of the water pipe P2 and the shaft core of the annular water blocking bag 20A are concentric (the outer peripheral surface of the annular water stopping bag 20A is the water pipe P2 As for the water pipe P1 located on the rear end side of the insertion from the joint B, each wheel 42 of the travel mechanism 40 located on the rear end side is inserted. Is urged by the urging portion evenly in the circumferential direction on the pipe inner peripheral surface 1a of the water pipe P1, and the pipe shaft of the water pipe P1 and the shaft core of the annular water-stopping bag 20A are concentric (annular water-stopping bag). The outer peripheral surface of 20A is pressed against the inner peripheral surface 1a of the water pipe P1. The inner peripheral surfaces 1a and 2a of the water pipes P1 and P2 can be uniformly pressed in the circumferential direction by the two annular water-stopping bags 20a, and the outer peripheral surface of the annular water-stopping bag 20A. And the water stop state between the pipe inner peripheral surfaces 1a and 2a of the water pipes P1 and P2 can be stabilized and reliable water stop can be performed.

  As described above, the axial core of the annular water stop means (cylindrical main body) and the tube axis of the fluid pipe can be maintained in a concentric state quickly and easily, and between the pipe inner peripheral surface by the annular water stop means. It is possible to provide a water pressure tester capable of stabilizing the water-stopping state and performing reliable water-stopping.

1 Inlet tube section (water pipe)
1a Pipe inner peripheral surface 2 Receiving pipe part (other water pipes)
2a Pipe inner peripheral surface 10 Cylindrical main body 11 Outer peripheral surface 11a Bag attachment part 11e Attachment part (the axial direction center side of both bag attachment parts)
20 annular water stop means 20A annular water stop bag (annular water stop means)
30 Water supply part 31 Projection pipe (mounting member)
32 Connection pipe (control rod)
40 Traveling mechanism 41 Wheel mounting portion 41A Arc portion (wheel mounting portion)
41B Extension part (wheel mounting part)
41E Guide hole (moving guide part, inclination regulating part)
42 Two-wheel parallel type wheels (multi-wheel parallel type wheels)
42a Wheel 43 Bogie part 43A Through hole (moving guide part, inclination regulating part)
43a Body (cart)
44 Movement guide part 45 Coil spring (biasing part)
45a Shaft part (movement guide part, inclination regulation part)
46 Inclination restriction part 47 Bolt (movement guide part, inclination restriction part)
A Water pressure tester B Joint part P1 Water pipe (fluid pipe)
P2 Other water pipes (fluid pipes)
S Clearance X Tube axis (fluid tube)
Y axis (cylindrical body)
V Annular sealed space W Water for water pressure test

Claims (8)

A cylindrical main body that can be carried into a fluid pipe, an annular water stop means that can be expanded to a state in which an annular sealed space for water pressure testing is formed on the inner peripheral surface side of the joint of the fluid pipe, and the annular stopper A water supply portion for supplying water for water pressure test into an annular sealed space formed by the diameter expansion operation of the water means, and a pair of traveling mechanisms disposed on both sides in the axial direction of the cylindrical body. A hydraulic testing machine equipped with,
The respective front Kihashi line mechanism, even without least in the axial direction as viewed is distributed in three locations in the circumferential direction of the cylindrical body, a plurality wheels parallel which respectively are parallel or two-wheel along the axial direction of A wheel of the mold, a wheel mounting portion fixed to the cylindrical main body, a cart portion that is tiltably connected to the wheel mounting portion and supports the wheel, and along a radial direction of the cylindrical main body Arranged between the wheel mounting part and the carriage part, and moving and energizing the carriage part to the radially outer side of the cylindrical body to bring the wheel into contact with the inner peripheral surface of the fluid pipe; A hydraulic testing machine provided with an urging portion that maintains the tube axis of the fluid tube and the axis of the cylindrical body in a concentric state. The wheels of the front Kihashi line mechanism each are in the axial direction as viewed, is arranged above two positions, respectively an upper half side portion and the lower half side portion in the circumferential direction of the cylindrical body,
At least some of the wheels of the wheel that is disposed on the upper half side portion is, in the axial direction as viewed, is disposed at a position symmetrical with respect to a vertical line passing through the axis of the cylindrical body,
At least some of the wheels of the wheel that is disposed on the lower half side portion is, in the axial direction when viewed, comprising disposed to be symmetrical positions with respect to a vertical line passing through the axis of the cylindrical body The water pressure tester according to claim 1. The wheels of the front Kihashi line mechanism each are in the axial direction as viewed, is arranged above two positions, respectively an upper half side portion and the lower half side portion in the circumferential direction of the cylindrical body,
And at least some of the wheels of the wheel that is disposed on the upper half side portion, and at least some of the wheels of the wheel that is disposed on the lower half side portion is, in the axial direction as viewed, the The water pressure tester according to claim 1 or 2, wherein the water pressure tester is disposed at a position that is symmetrical with respect to the axis of the cylindrical main body. Between said truck the wheel mounting portion, the movement guide portion for movably movement guide is a pre-Symbol table drive unit for the previous SL vehicle wheel mounting portion radially outward side of the cylindrical body hydraulic machine according to any one of claims 1 to 3 are provided, et al. The urging portion is composed of at least one of a coil spring and a damper,
Wherein the biasing unit, water pressure according to claim 1 comprising a plurality of arranged so as to correspond to each wheel of said plurality wheel parallel type wheels which are supported by the front Symbol table drive unit testing machine. Between the front Symbol table drive unit and the front SL wheel wheel mounting portion, the claim inclined regulating portion is provided to prevent the setting angle or tilt in the pitching direction of the carriage portion to the wheel mounting portion 1 The water pressure tester according to any one of? The annular water stop means is provided on both sides in the axial direction of the outer peripheral surface of the cylindrical main body, and between the pipe inner peripheral surface that is displaced to both sides in the axial direction with respect to the joint portion of the fluid pipe. It is composed of a pair of annular water-stopping bags that can be operated to expand the diameter to the respective water-stopping states, and the water supply portion is cylindrical in the axial direction center side of both bag mounting portions of the cylindrical body. A protruding tube that protrudes radially inward from the inner peripheral surface of the main body and penetrates the inner peripheral surface and outer peripheral surface of the cylindrical main body, and can be connected to the protruding tube from the radially inner side of the cylindrical main body A connecting pipe, and configured to be able to supply water for water pressure test into the annular sealed space from the outside of the fluid pipe through the connecting pipe and the protruding pipe.
The protruding tube is also used as an operating rod mounting member capable of operating the cylindrical main body carried into the fluid tube along the axial direction of the fluid tube, and the connecting tube is also used as the operating rod. The water pressure tester according to any one of claims 1 to 6 , wherein The hydraulic testing machine according to claim 7 , wherein the protruding tube is disposed in a lower half side portion of the cylindrical main body as viewed in the axial direction.

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