JPH0436426Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a hydraulic pressure testing device for piping in a bridge.

BACKGROUND ART Various technologies have been developed for laying piping such as water pipes along bridges. For example, the present applicant previously filed Utility Application No. 59-100241 (see Japanese Unexamined Patent Publication No. 61-16481).
As shown in FIGS. 7 and 8, a flexible structure bridge such as a suspension bridge 1 is disclosed in which piping 5 is laid along the bridge girder 2 and through the diaphragm 3 thereof.

Problems to be Solved by the Invention However, since the piping 5 as described above is installed in the air, there is no suitable water pressure test means, and therefore, the problem is that it is impossible to check the sealing properties of the joints of the piping 5. It was hot.

The present invention solves the above-mentioned problems and aims to provide a hydraulic testing device that can easily test the sealing properties of piping in bridges.

Means for Solving the Problems In order to solve the above problems, the present invention is a water pressure testing device for piping installed along the girder of a bridge through a diaphragm, in which the end of the piping is closed. a lid, a first and second backing plate attached to the diaphragm via a rubber plate, a frame interposed between the first and second backing plates, and a second backing plate. A stay bolt is provided to connect the lid body, and a rubber plate, a first patch plate, a frame body, and a second patch plate are alternately divided into two parts in a horizontal direction and a vertical direction and fitted onto the piping. The present invention provides a water pressure testing device.

Effect With the above configuration, both ends of the pipe laid along the bridge girder of the bridge are closed with the lid body, and this lid body is supported by the diaphragm of the bridge girder via the stay bolt, so that the inside of the pipe can be closed. A test water pressure can be applied by supplying pressurized water to the joint, and by holding this water pressure loaded state for a predetermined period of time, if there is a leak in the joint, it can be detected by the drop in water pressure. It becomes possible to easily test the sealing properties of piping.

Example Examples of the present invention will be described below.

1 and 2 show a first embodiment of the present invention. In both figures, 3 is a diaphragm that constitutes a bridge girder, and a pipe hole 4 through which a pipe 5 passes is formed. The end of the pipe 5 is open through the pipe hole 4, and a socket 6a of a short pipe 6 whose other end is closed with a flange lid 7 is fitted into the open end. ing. On the other hand, on the side of the diaphragm 3 opposite to the opening of the pipe 5,
A first backing plate 9 is attached via a rubber plate 8 for absorbing distortion, and a frame 10 made of rectangular shaped steel and a second backing plate 11 are superposed and attached thereon. These rubber plates 8, backing plates 9, 11, and frame 10 are divided into two parts alternately in the horizontal and vertical directions so that they can be fitted onto the pipe 5. Said second
A plurality of stay bolts 13 extend from the inner peripheral part of the backing plate 11, passing through the piping hole 4, toward a connecting flange 12 formed on the outer periphery of the socket part 6a of the short pipe 6. 2nd at stay bolt 13
The backing plate 11 and the connecting flange 12 are connected to each other. The inner periphery of the socket 6a of the short pipe 6 and the piping 5
Similar to the embodiment shown in FIG. It is configured to be pressed by a nut 15 screwed into the.

In the above configuration, in order to perform a water pressure test on the piping 5, the short pipe 6 closed with the flange lid 7 is fitted onto the end of the piping 5, and the stay bolt 13,
A water pressure pump (not shown) is installed inside the pipe 5, supported by the diaphragm 3 via the backing plate 11, etc., and further pressed against the sealing material by the press ring 14 to seal between the pipe 5 and the short pipe 6. Supply pressurized water. This pressurized state is maintained for a certain period of time, and changes in water pressure are detected. If there is a leak in the seal part of piping 5,
A drop in water pressure can be detected and necessary countermeasures can be taken, and if there is no drop in pressure, it is confirmed that there is no leak. In addition, during a water pressure test, for example, if a tube with a diameter of 500 mm is loaded with 15 kg per square cm, a detachment force of approximately 30 tons or more will act.
This detachment force is applied from the flange lid 7 to the stay bolt 1.
3 to the second backing plate 11, and the second backing plate 11 transmits this force to the frame 10 while enduring the force received from the stay bolt 13. For this reason, the thickness of the second backing plate 11 is increased. The frame body 10 is constructed by assembling shaped steel into a rectangular shape, and is lightweight, has excellent operability, and has sufficient strength.
It is transmitted to the backing plate 9 of. The first backing plate 9 receives the concentrated force acting on the frame body 10 on its surface and disperses this force, and this dispersed force acts on the diaphragm 3 via the rubber plate 8. Therefore, even if a large detachment force as described above is applied, the diaphragm 3 will not be deformed due to an uneven load, and the powder coating on the diaphragm 3 will not peel off.

Next, a second embodiment will be explained with reference to FIGS. 3 and 4. In the first embodiment described above, a short pipe 6 closed with a flange lid 7 was used, but in this embodiment, a lid body integrally has a cylindrical portion 17 that fits over the end of the pipe 5. 16 is used. In detail, a reinforcing rib 16b is provided on the outer surface of the end plate 16a of the lid 16, and a connecting flange 18 is provided on the outer periphery of the open end of the cylindrical portion 17. on the other hand,
A protrusion 19 is formed on the outer periphery of the end of the pipe 5, and a backup spring 20 that engages with the protrusion 19;
A press ring 14 arranged opposite to the connection flange 18
A sealing material 21 is inserted between the intermediate ring 22 and
is arranged, and by pinching the sealing material 21 between the back-up spring 20 and the intermediate ring 22, the sealing material 21 is brought into pressure contact with the inner circumferential surface of the cylindrical portion 17 and the outer circumferential surface of the pipe 5. Constructed to ensure a seal.

The operation in this embodiment is similar to that in the first embodiment.

Next, a third embodiment will be explained with reference to FIGS. 5 and 6. In the above embodiment, the case where the end of the pipe 5 is a socket is illustrated, but this embodiment is an example in which the end of the pipe 5 is a socket. The open end of the pipe 5 serves as a socket 23, and a locking groove 24 is formed on the inner peripheral surface thereof. A lid body 25 that closes the socket 23 is attached to the lid plate 26.
A cylindrical body 27 to be inserted therein is integrally provided in a protruding manner, and a pressing protrusion 28 is formed on the outer periphery of the connection portion with the lid plate. A split lock ring 29 is installed in the lock ring groove 24 in the circumferential direction, and a sealing material 31 is interposed between the lock ring 29 and the pressing protrusion 28 via a back-up spring 30. A reinforcing rib 26a is provided on the outer surface of the cover plate 26, and a bolt hole 26b is formed in the outer circumference of the cover plate 26, through which the stay bolt 13 is inserted.

The operation in this embodiment is also similar to that in the first embodiment.

In addition, in the case where there is no engagement protrusion 19 on the outer periphery of the end of the pipe 5 in the second embodiment, a locking groove 24 is formed on the inner periphery of the cylindrical body 17 as in the third embodiment.
A lock ring 29 may be used.

Effects of the invention According to the invention, as described above, the lid for closing the end of the pipe, the first and second backing plates attached to the diaphragm via the rubber plate, and the first and second A frame interposed between a second backing plate, and a stay bolt connecting the second backing plate and the lid body, the rubber plate, the first backing plate, the frame, and the second backing plate. The pipe is divided into two parts alternately horizontally and vertically and fitted around the pipe, so both ends of the pipe laid along the bridge girder are closed with a lid body, and this lid body is attached to the stay bolts. It can be reliably supported by the diaphragm of the bridge girder through the rubber plate, the first backing plate, the frame, and the second backing plate without damaging the painting or piping of this diaphragm, and the inside of the pipe. By supplying pressurized water and applying test water pressure as a load, leakage at the joints of pipes can be detected by a drop in water pressure, making it possible to easily perform water pressure tests on pipes in bridges.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of the first embodiment of the present invention, Fig. 2 is a front view of the same, Fig. 3 is a front view of the upper half of the second embodiment, and Fig. 4 is an enlarged cross-section of the main part. Figure 5 is a front view of the upper half of the third embodiment, Figure 6 is an enlarged sectional view of the same main part, Figure 7 is a front view of a conventional bridge, and Figure 8 is A of Figure 7. -A sectional view. 1... Bridge, 2... Bridge girder, 3... Diaphragm, 5... Piping, 6... Short pipe, 7... Flange lid (cover), 10... Frame, 9, 11... Backing plate, 1
3... Stay bolt, 16, 25... Lid body.

Claims (1)

[Scope of utility model registration request] A water pressure testing device for piping installed along a bridge girder through a diaphragm, the device comprising a lid for closing an end of the piping, and first and second pipes attached to the diaphragm via a rubber plate. A rubber plate, a frame body interposed between the first and second backing plates, and a stay bolt connecting the second backing plate and the lid body, the rubber plate, the first backing plate A hydraulic pressure testing device for piping in a bridge, characterized in that the frame body and the second backing plate are alternately divided into two parts in the horizontal and vertical directions and fitted onto the piping.