JPH0446191Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a curved pipe hydraulic testing machine.

BACKGROUND TECHNOLOGY A conventional hydraulic pressure tester for a curved pipe applies the force to a curved pipe that moves due to an unbalanced force of water pressure at a curved portion of the pipe, through a load receiving member that is in contact with the outer peripheral wall of the curved pipe. By resisting and energizing, the bent pipe was stopped on the hydraulic testing machine. The water pressure test was performed by visually observing water leakage occurring on the outer surface of the pipe to determine whether there was any leakage.

Problems to be Solved by the Invention However, according to the above-mentioned conventional configuration, when a water leakage point caused by a casting defect exists in a part where the load receiving member contacts, the water leakage point is not covered by the load receiving member. There was a problem in that it was difficult to visually detect water leaks.

This invention solves the above-mentioned problems, and is capable of restraining a bent pipe on a testing machine without bringing any load bearing members into contact with the surrounding wall of the bent pipe subject to the water pressure test. The purpose is to provide a machine.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a structure that is arranged corresponding to the open ends on both sides of a curved pipe, so that it can contact the open ends in a watertight manner, and It has a pipe receiving part capable of supplying high-pressure water into the pipe, and a plurality of claw parts that can come into contact with a collar part formed around the open end of the bent pipe. and a tube fixing part that fixes and holds the open end of the tube to the tube receiving part,
One of the tube receiving portions and the tube fixing portion is provided on a horizontal bed that swings around a horizontal axis.

Effect In the above configuration, the bent pipe that is the test object is
The pipe receiving part is placed in watertight contact with each of the open ends on both sides, and the collar part around the open end is held by the pipe fixing part via a plurality of claw parts. The part is fixed to the tube receiving part. In this state, high-pressure water is supplied into the bent pipe from the pipe receiving portion to perform a water pressure test on the bent pipe.

At this time, the claws of the pipe fixing part that fixes and holds the bent pipe are in contact with the flange of the bent pipe, so the pipe fixing part detects water leakage at the circumferential side of the bent pipe, which is the part to be tested. There is no obstruction.

Embodiment An embodiment of the present invention will be described below based on the drawings. 1 to 3, on the pedestal 1, one of the open ends on both sides of the curved pipe 2 is arranged with the opening facing in the horizontal direction.
A vertical holding device 3 that fixedly holds the opening end 2b, and a horizontal holding device 4 that fixedly holds the other open end 2b are arranged. In addition, in this example, the bent pipe 2 is 90°
It is a bent pipe. The vertical shape holding device 3 is movable horizontally on the base 1 by a moving mechanism. The moving mechanism includes a rack 5 laid on the pedestal 1, a pinion 6 that meshes with the rack 5 and is provided on the side of the vertical holding device 3, and a driven member fixed to the rotating shaft of the pinion 6. It is composed of a chain wheel 7, a drive chain wheel 9 that drives the driven chain wheel 7 via a chain 8, and a handle part 10 that is fixed coaxially with the drive chain wheel 9 and rotates the drive chain wheel 9. ing. In addition, the vertical holding device 3 includes a pair of first
A vertical bed 12 is provided which is vertically raised and lowered by cylinders 11a and 11b. The first place that can supply
A tube receiving portion 13 is provided. First pipe receiving part 1
The details of 3 will be described later. Next, the horizontal holding device 4 has a horizontal rotating shaft 14, and this rotating shaft 14 is rotatably supported by a bearing 15 on the pedestal 1, so that a horizontal bed 16 is provided that can freely swing in the vertical direction. is provided. Further, in the horizontal holding device 4, a second cylinder 17 that can swing the horizontal bed 16 and hold it at a required angle is installed between the arm part 18 provided on the rotation shaft 14 and the pedestal 1, with both ends swinging. They are movably connected. The horizontal bed 16 is provided with a second pipe receiving part 19 that can accommodate the other open end 2b of the bent pipe 2 and can discharge the high-pressure water supplied to the inside of the bent pipe 2. The first and second tube receivers 13 and 19 have similar configurations, and the first tube receiver 13 will be described here. The first pipe receiving part 13 is located at the open end 2 of the curved pipe 2.
a plurality of claws 21a that can lock the flange 20a formed in the opening end 2a and extend and retreat in the radial direction of the opening end 2a;
High-pressure water is supplied to the inside of the curved pipe 2 and a pipe fixing part formed by a gear mechanism (not shown) that moves the plurality of claw parts 21a in and out in synchronization and a driving cylinder 22a. It is comprised of a tube receiving seat 23a that has a supply port (not shown) and can contact the open end of the bent pipe 2 in a watertight manner, and a pressing cylinder 24a that moves the tube receiving seat 23a in and out. The second tube receiving portion 19 was also configured in the same manner. Claw part 2
1b, egress and egress cylinder 22b, and tube receiving seat 23b
and a pressing cylinder 24b are provided.
Note that 25 is a hydraulic pump that drives each cylinder.

The operation of the above configuration will be explained. First, each claw part 21a, 21b is retreated, and while the horizontal bed 16 is kept in a horizontal state, the bent pipe 2 is
is placed on the tube receiving seat 22b of the second tube receiving portion 19. Then, the claw portion 21b is attached to the flange portion 20b of the bent pipe 2.
advance to a position where it can engage. After that,
The bent pipe 2 is pushed upward by the pressing cylinder 24b via the pipe receiving seat 23b. Pushed up bent pipe 2
The collar portion 20b is locked by the claw portion 21b, and the tube receiving seat 23b is pressed against the opening edge in a watertight manner. Next, the rotation shaft 14 is rotated by the second cylinder 17 via the arm 18 to incline the horizontal bed 16 so that one open end of the bent pipe 2
Adjust the aperture so that it faces horizontally. Then, the vertical holding device 3 is brought close to one open end 2a of the bent pipe 2 by manually rotating the handle portion 10 and driving the pinion 6 into engagement with the rack 5. together with the first cylinder 11
Move the mizutari bed 12 by a and 11b,
The first tube receiving portion 13 is made to correspond to the open end portion 2a.
After advancing the claw portion 21a to a position where it can engage with the flange portion 20a, the vertical holding device 3 is separated to a position where the claw portion 21a locks the flange portion 20a. Next, the tube receiving seat 2 is pressed by the pressure cylinder 24a.
3a to the opening edge in a water-tight manner. In this state, high pressure water is supplied to the inside of the bent pipe 2 to perform a water pressure test. At this time, the bent pipe 2 has flange portions 20a, 20
b is locked by the claw portions 21a, 21b, and the tube receiving seats 23a, 23b are pressed against the open ends to be fixedly held on the first and second tube receiving portions 13, 19. There is nothing that obstructs the detection of water leakage in the circumferential side, which is the part to be tested, and the results of the water pressure test can be verified over the entire circumferential side.

Effects of the Device As described above, according to the present invention, by fixing and holding the bent pipe by locking it with the claw at the flange at the open end, leakage of water at the circumferential side of the bent pipe, which is the part to be tested, is prevented. Since the bent pipe can be fixedly held in the testing machine without interfering with detection, the results of the water pressure test can be verified over the entire area targeted for the water pressure test. Furthermore, by tilting the horizontal bed and swinging the curved pipe, it is possible to respond appropriately to the bending angle of the curved pipe.

[Brief explanation of the drawing]

FIG. 1 is an overall front view showing an embodiment of the present invention;
2 is a plan view taken along the line aa in FIG. 1, and FIG. 3 is a plan view taken along line bb in FIG. 1. 2...Bent pipe, 2a, 2b...Open end, 3...
Vertical holding device, 4... Horizontal holding device, 13... First tube receiving part, 19... Second pipe receiving part, 20a, 2
0b...Brim part, 21a, 21b...Claw part, 22
a, 22b...exit cylinder, 23a, 23b...
...Tube receiving seat, 24a, 24b...Press cylinder.

Claims (1)

[Scope of utility model registration request] Pipe receivers disposed corresponding to the open ends on both sides of the curved pipe and capable of contacting the open ends in a watertight manner and capable of supplying high-pressure water into the curved pipe; and the open end of the curved pipe. a tube fixing part that has a plurality of claws that can come into contact with a flange formed on the periphery of the curved pipe, and fixes and holds the open end of the bent pipe to the pipe receiving part via the claws; A curved pipe hydraulic pressure testing machine characterized in that one of the pipe receiving parts and the pipe fixing part are provided on a horizontal bed that swings around a horizontal axis.