JPH09178602A - Fluid-pressure testing apparatus for tube with different diameter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attach and detach a tube different diameter effectively and easily by holding the tube horizontally whose inner diameter can be changed in tube's axial core direction, on a base table. SOLUTION: When a tube 1 with different diameter such as joint tube, etc., whose inner diameter can be changed in tube's axial core direction is subjected to measurement of fluid-tightness, it is placed and held horizontally on a base table and an opening 1a thereof is sealed by a sealing device A. While it is kept in a fluid-tight condition, a pressure fluid is fed into the tube through a pressure fluid feeding device B, and all air inside the tube are discharged through a suction port 3a of a discharging tube 3 which is moved to the highest position within the tube 1 by a suction port moving mechanism, to the outside. Thus, since the tube 1 is placed horizontally on the base table, it can be fixed on the base table in specified horizontal attitude with a small number of jigs even when the intermediate part of the tube 1 in axial core direction can be bent freely.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic pressure tester used for confirming liquid leakage due to cracks or cavities in pipes of different diameters such as a joint pipe whose inner diameter changes in the axial direction of the pipe.

[0002]

2. Description of the Related Art In a conventional hydraulic testing machine for different diameter pipes, a base for mounting and supporting the different diameter pipes in a vertically oriented posture with the axial center of the pipes arranged vertically is mounted and supported on the base. A sealing device that is switchable between a closed state in which the upper opening of the different diameter pipe is closed in a liquid-tight state and an open state in which the upper opening is removed from the opening of the different diameter pipe, and is mounted and supported on the base. A moving mechanism for horizontally moving the different-diameter pipe to the sealing action position of the sealing device, and a pressure liquid supply device for supplying a pressure liquid into the different-diameter pipe sealed by the sealing device are provided to the sealing device. Has an air discharge device for guiding the air in the different diameter pipe to the outside with the supply of the pressure liquid into the different diameter pipe.

[0003]

In the conventional hydraulic tester for different diameter pipes described above, since the different diameter pipes are mounted in a vertical position on the base, the pressure liquid is supplied into the different diameter pipes. The required air can be reliably and smoothly discharged through the upper opening of the different diameter pipe, but when the pipe axis length of the different diameter pipe becomes long, it is placed in a vertical position on the base. Since the different-diameter pipe is likely to become unstable, it is necessary to fix the different-diameter pipe to the base using a plurality of jigs, and it takes a lot of time to attach and remove the different-diameter pipe. . In particular, when the middle portion of the different diameter pipe in the axial direction of the pipe is bendable, it becomes difficult to mount the different diameter pipe on the base in a predetermined vertical posture. The number of types of jigs and the number of jigs used to fix the jigs on the base have increased, and more work has been required for mounting and removing the different diameter pipes.

The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to mount a different diameter pipe on a base in a sideways posture so that the different diameter pipe can be mounted and mounted. This is to make it possible to reliably and smoothly discharge the air necessary for supplying the pressure liquid into the different-diameter pipe, while making the removal work more efficient and easier.

[0005]

A hydraulic pressure testing machine for different diameter pipes according to claim 1 of the present invention is characterized by a base for placing and supporting a different diameter pipe whose inner diameter changes in the axial direction of the pipe in a horizontal posture. And a sealing device that can be switched between a closed state in which the opening of the different-diameter pipe mounted and supported on the base is closed in a liquid-tight state and an open state in which the opening of the different-diameter pipe is separated from the opening of the different-diameter pipe. A pressure liquid supply device for supplying the pressure liquid into the different diameter pipe sealed by the device, and a discharge pipe for guiding the air in the different diameter pipe to the outside with the supply of the pressure liquid into the different diameter pipe are provided. An air discharge device is provided, and an intake port moving mechanism for moving the intake port portion of the exhaust pipe is provided at a position corresponding to the highest position in the different diameter pipe. According to the above characteristic configuration, when testing the liquid tightness of a different diameter pipe such as a joint pipe whose inner diameter changes in the pipe axis direction, after mounting the different diameter pipe on the base in a lateral posture, The opening of the different diameter pipe mounted and supported on the base by the sealing device is closed in a liquid-tight state. In this sealed state, the pressure fluid supply device supplies the pressure fluid into the different diameter pipe, and at the same time, the intake port of the discharge pipe moved to the highest position in the different diameter pipe discharges all the air in the different diameter pipe to the outside. Discharge. Therefore, since the different-diameter pipe is placed on the base in a horizontal posture, even if the middle portion of the different-diameter pipe in the axial direction of the pipe is bendable, the different-diameter pipe is used with a small number of jigs. Since it can be fixed on the base in a predetermined sideways posture, it is possible to efficiently and easily attach and remove the different diameter pipe. Moreover, when the pressure liquid is filled in the different-diameter pipe that is sealed in a liquid-tight state, a large amount of residual air is generated because no air remains or there is little residual air at the highest position in the different-diameter pipe. A dangerous situation occurs due to being compressed to a high pressure with the supply of fluid, that is, a large amount of residual air compressed to a high pressure explosively expels at the crack generation point of the different diameter pipe. It is possible to reliably prevent the occurrence.

According to a second aspect of the present invention, there is provided a characteristic configuration of the hydraulic tester for a different-diameter pipe, wherein the intake port moving mechanism corresponds to the highest position in the different-diameter pipe as the pressure liquid is supplied into the different-diameter pipe. In addition, it is composed of a floating mechanism for floatingly moving the intake port of the discharge pipe. According to the above characteristic configuration, the opening of the different-diameter pipe mounted and supported on the base by the sealing device is closed in a liquid-tight state, and the pressure fluid is supplied into the different-diameter pipe by the pressure liquid supply device in this sealed state. When the air is supplied, the intake port of the exhaust pipe located inside the different-diameter pipe discharges the air in the different-diameter pipe to the outside while following the liquid level, and finally the intake port of the exhaust pipe becomes a floating mechanism. The air within the different diameter pipe is smoothly discharged to the outside by floating movement to the highest position in the different diameter pipe.
Therefore, for example, from the drive elevating mechanism for forcibly moving the intake port moving mechanism up and down the intake port portion of the discharge pipe between the highest position equivalent position in the different diameter pipe and the position allowing extraction of the different diameter pipe. Compared with the structure, the intake port moving mechanism can be manufactured advantageously in terms of manufacturing cost.

According to a third aspect of the present invention, there is provided a characteristic configuration of the hydraulic testing machine for a different diameter pipe, wherein at least a part of the discharge pipe located in the different diameter pipe is included in the floating mechanism. It is configured to be movable up and down, and a float is attached to the intake port side of the discharge pipe. According to the above characteristic configuration, since only the floating body is attached to the intake pipe side of the vertically movable discharge pipe, the floating mechanism can be manufactured advantageously in terms of manufacturing cost.

According to a fourth aspect of the present invention, there is provided a characteristic configuration of the hydraulic testing machine for different diameter pipes, wherein in the floating mechanism, at least a part of the discharge pipe located in the different diameter pipe is formed. The point is that it comprises a flexible tube that can be bent and moved in the vertical direction, and a floating body is attached to the intake port side of the discharge pipe. According to the above characteristic configuration, by utilizing the bending of the flexible tube itself forming at least a part of the discharge pipe located in the different diameter pipe, the pressure liquid in the different diameter pipe is supplied to the inside of the different diameter pipe. Since the intake port of the discharge pipe is moved to the position corresponding to the highest position in a floating manner, for example, compared with the case where a plurality of rigid discharge pipes are connected in a vertically movable manner, the structure of the entire discharge pipe is simplified. It is possible to reduce the manufacturing cost.

According to a fifth aspect of the present invention, there is provided a characteristic configuration of a hydraulic testing machine for different diameter pipes, wherein a length adjusting portion of a portion of the discharge pipe located in the different diameter pipe is capable of expanding and contracting adjustment within a certain range. Is provided. According to the above characteristic configuration, even if the distance from the opening of the different-diameter pipe to the highest position equivalent position in the different-diameter pipe differs depending on the type of the different-diameter pipe, the length provided in the discharge pipe portion located in the different-diameter pipe By adjusting the expansion and contraction of the height adjusting portion, the intake port of the discharge pipe can be reliably floated to a position corresponding to the highest position in the different diameter pipe.

A characteristic configuration of the hydraulic tester for different diameter pipes according to claim 6 of the present invention is that a posture holding means for holding the intake port portion of the discharge pipe in an upward posture is provided. According to the above characteristic configuration, when the intake port of the discharge pipe floats along with the pressure liquid supplied into the different diameter pipe, the intake port does not change its posture sideways or downward, The air in the pipe can be reliably discharged.

According to a seventh aspect of the present invention, there is provided a characteristic configuration of a hydraulic testing machine for different diameter pipes. The point is that a supporting portion for stopping and supporting is provided. According to the above characteristic structure, at least a part of the discharge pipe located in the different diameter pipe is vertically movable so that the intake port of the discharge pipe can float along with the pressure liquid supplied into the different diameter pipe. However, since the movable pipe portion of the discharge pipe can be received and supported in a posture in which it can be inserted into the different diameter pipe, it is necessary to lift the movable pipe portion of the discharge pipe one by one when mounting or removing the different diameter pipe. Therefore, it is possible to facilitate the work of mounting and removing the different diameter pipe.

According to the eighth aspect of the present invention, there is provided a characteristic structure of the hydraulic tester for different diameter pipes, wherein the suction port portion of the discharge pipe is elastically deformable by being elastically deformed by contact with the inner surface of the different diameter pipe. It is composed of an intake pipe. According to the above feature configuration,
When the intake port of the discharge pipe floats along with the pressure liquid supplied into the different diameter pipe to a position corresponding to the highest position in the different diameter pipe,
Since the elastic intake pipe is elastically bent and deformed along the inner surface of the different-diameter pipe, even if the intake port that floats and moves slightly from the highest position in the different-diameter pipe in the axial direction of the pipe, The air at the position corresponding to the highest position of can be reliably and smoothly discharged.

A characteristic configuration of the hydraulic testing machine for different diameter pipes according to claim 9 of the present invention is that the posture maintaining means is constituted by a weight provided on the floating body. According to the above characteristic structure, the weight provided on the floating body can hold the intake port of the discharge pipe in an upward posture,
For example, as compared with a case where a guide member for vertically moving the intake port of the discharge pipe in an upward posture is provided, the posture holding means can be manufactured advantageously in terms of manufacturing cost.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] FIGS. 1 to 6 are hydraulic pressures used when confirming liquid leakage due to cracks or cavities of a different-diameter pipe 1 such as a joint pipe whose inner diameter changes in the axial direction of the pipe ( A water pressure tester is shown, which is a base 2 for mounting and supporting the different diameter pipe 1 in a sideways posture in which the tube axis of the pipe is horizontal or substantially horizontal, and mounted and supported on the base 2. A sealing device A, which is switchable between a closed state in which both openings 1a of the different diameter pipe 1 are closed in a liquid-tight (watertight) state and an open state in which the opening is removed from the opening part of the different diameter pipe, and the sealing device A. A pressure liquid supply device B for supplying a pressure liquid (pressure water) into the sealed different-diameter pipe 1, and the air in the different-diameter pipe 1 to the outside as the pressure liquid is supplied into the different-diameter pipe 1. An air discharge device C having a discharge pipe 3 for guiding discharge, and a base horizontal movement for forcibly moving the base 2 in the horizontal direction along the tube axis direction of the different diameter pipe 1. And location D, provided with a base elevation driving device E for elevating the base 2, wherein the exhaust pipe 3 of the inlet portion 3a to the highest position corresponding portions of the different-diameter pipe in one
There is provided an intake port moving mechanism F for moving.

Next, the sealing device A will be described.
As shown in FIGS. 1 to 4, a pair of fixed plates 10 and 1 installed and fixed so as to face each other in the tube axis direction of the different diameter tube 1.
1, a plurality of guide shafts 13 for supporting the movable plate 12 so as to be slidably movable along the tube axis core direction of the different diameter pipe 1 are installed, and the movable plate 12 and one fixed plate 10 are relatively opposed to each other. Pipe holding members 14 and 15 for holding and fixing the connection flanges 1b formed in both openings 1a of the different diameter pipe 1 from the axial direction of the pipe are attached to the respective facing surfaces, and the pipe holding members 14 and 15 are also attached. An elastic sealing material 16 for liquid tight contact with the connecting flange 1b of the different diameter pipe 1 is provided on each of the pipe holding surfaces. The fixed plate 11 on the other side includes the movable plate 1
A pair of return type first hydraulic cylinders 17 for advancing 2 from the holding position to the pipe holding position, and a single acting second hydraulic cylinder for pressing the movable platen 12 moved to the pipe holding position with a predetermined holding pressure. 18 is provided, and the pipe is inserted in the different-diameter pipe 1 held in a liquid-tight state by the two pipe holding members 14 and 15 over one fixed plate 10 and the pipe holding member 15 fixed to the fixed plate 10. An openable and closable lid 20 is formed on the fixed plate 10 so as to open and close, and a passage 19 communicating from the axial direction is formed in a penetrating state, and one opening of the passage 19 is closed in a liquid-tight state. is there. Further, as shown in FIG. 5, a four-port three-position switching type first switching valve 21 is connected in the hydraulic circuit from the first hydraulic pump P1 that is interlocked with the electric motor M to both the first hydraulic cylinders 17. At the same time, in the hydraulic circuit from the second hydraulic pump P2 linked to the electric motor M to the second hydraulic cylinder 18, a 4-port three-position switching type second switching valve 22 and a piston of the second hydraulic cylinder 18 are provided. A check valve 23 is connected to allow the oil to flow from the tank T to the cylinder chamber 18b of the second hydraulic cylinder 18 when the rod 18a moves integrally with the movable plate 12 to the pipe holding position. Then, the first switching valve 21 is switched from the neutral operation position to the forward operation position to operate the first hydraulic pump P1.
When the pressure oil from the first hydraulic cylinders 17 is supplied to the first cylinder chambers 17a on the forward side of both the first hydraulic cylinders 17,
The movable platen 12 is advanced from the pinching release position to the pipe holding position by the extension operation of the movable platen 12, and the different diameter pipe 1 is held between the pipe holding member 14 of the movable platen 12 and the pipe holding member 15 of the one fixed platen 10. To be done. When the second switching valve 22 is switched from the neutral operating position to the pressurizing operating position in this state, the second hydraulic pump P
The pressure oil from 2 is applied to the cylinder chamber 18 of the second hydraulic cylinder 18.
b, the movable platen 12 is pressed by a predetermined holding pressure by the extension operation of the second hydraulic cylinder 18, and both openings 1a of the different diameter pipe 1 are liquid-tightly sealed. When removing the different diameter pipe 1 for which the hydraulic pressure test has been completed, the second switching valve 2 is used.
When 2 is switched to the depressurizing operation position, the pressure oil in the cylinder chamber 18b of the second hydraulic cylinder 18 is returned to the tank T. Further, when the first switching valve 21 is switched to the reverse operation position and the pressure oil from the first hydraulic pump P1 is supplied to the second cylinder chambers 17b of the first hydraulic cylinders 17 on the reverse side, both first hydraulic valves By the contraction operation of the hydraulic cylinder 17, the movable platen 12 moves backward from the pipe holding position to the holding release position.

As shown in FIG. 4, the pressure liquid supply device B is in a state in which it is opened in the passage 19 in a pipe portion 30 fixed to one of the fixed plates 10 so as to form a part of the passage 19. Liquid supply pipe 32 equipped with a gate valve 31 and liquid (water)
Is connected to a drainage pipe 34 provided with a hydraulic pump 33 for increasing the pressure to a predetermined test pressure.

As shown in FIGS. 4 and 6, the air discharge device C has a tube holding member 1 which constitutes a part of the passage 19.
5, the sluice valve 40 and the pump 41 are connected to the exhaust pipe portion located outside the passage 19 of the exhaust pipe 3 arranged so as to pass through the exhaust pipe 3, and the intake port portion 3a of the exhaust pipe 3 is connected.
Is made to face the inside of the different-diameter tube 1 sealed in a liquid-tight state. Further, the intake port moving mechanism F includes the different diameter pipe 1
The floating mechanism F comprises a floating mechanism for floatingly moving the intake port portion 3a of the discharge pipe 3 to a position corresponding to the highest position H in the different diameter pipe 1 as the pressure liquid is supplied into the inside. It is configured as follows. That is, a first discharge pipe portion in which a pipe portion of the discharge pipe 3 located inside the pipe holding member 15 and inside a different-diameter pipe 1 sealed in a liquid-tight state is fixed through the pipe holding member 15. 3A and the first universal joint 3 which is vertically swingable around the first horizontal axis X1 with respect to the first discharge pipe portion 3A.
The second discharge pipe portion 3B, which is connected and communicated via E,
A third discharge pipe portion 3C that is extendably inserted into and connected to the discharge pipe portion 3B, and in the pipe axis direction within a certain angle range around the second horizontal axis X2 with respect to the third discharge pipe portion 3C. The fourth discharge pipe portion 3D includes a fourth discharge pipe portion 3D which is swingably connected to and connected to the second universal joint 3F and has an intake port portion 3a formed on the distal end side thereof. Inlet part 3
The floating body 4 is attached to the a side. The floating body 4 is a fourth
Inside the sealed case 4A attached to the discharge pipe portion 3D, the specific gravity is smaller than that of the pressure liquid supplied from the pressure liquid supply device B, and the second discharge pipe portion 3B to the fourth discharge pipe portion 3 are provided.
A liquid (for example, oil) 4B that generates sufficient buoyancy to float the movable tube portion up to D that is vertically movable is enclosed. Further, the tip of the second discharge pipe portion 3B is formed in a taper provided with a slit for allowing the bending deformation inward in the radial direction, and the tapered tip portion has a second discharge portion. A tightening ring 3G for screwing the third discharge pipe portion 3C fitted in the pipe portion 3B to a state where the third discharge pipe portion 3C is fixed by tightening is screwed. Then, the second discharge pipe portion 3B, the third discharge pipe portion 3C, and the tightening ring 3G form a length adjusting portion 5 for expanding and contracting the pipe portion located in the different diameter pipe 1 within a certain range. There is. In the bracket 42 provided on the inner peripheral surface of the pipe holding member 15, a movable pipe portion that can move up and down from the second discharge pipe portion 3B to the fourth discharge pipe portion 3D is provided in the pipe 1 having a different diameter. A plate-like support portion 6 is provided to receive and support the posture so that it can be inserted from any direction. The second universal joint 3F has the third discharge pipe portion 3 within a range in which the intake port portion 3a of the fourth discharge pipe portion 3D always faces upward.
It is configured to regulate the swing range of the fourth discharge pipe portion 3D with respect to C. That is, the second universal joint 3F constitutes a posture holding means for holding the intake port portion 3a of the discharge pipe 3 in the upward posture. Also, the fourth
When the opening peripheral edge of the fourth discharge pipe portion 3D abuts the inner surface of the different diameter pipe 1 due to the floating movement to the highest position in the different diameter pipe 1 at the opening peripheral edge of the discharge pipe portion 3D, A notch 3b for sucking the air existing at the highest position in 1 is formed. Then, at the time when the liquid is discharged from the discharge pipe 3, it is considered that the air in the different diameter pipe 1 is discharged, and the driving of the pump 41 is stopped and the sluice valve 40 is closed. In addition, when the air in the different diameter tube 1 can be discharged to the outside through the discharge pipe 3 of the air discharging device C by the pressure liquid supplied into the different diameter tube 1 sealed by the sealing device A, It is not necessary to provide the pump 41.

The base horizontal moving device D is shown in FIGS.
As shown in FIG. 4, a bogie 47 having a plurality of wheels 46 rolling along a pair of left and right rails 45 laid on the floor of the installation location, and the bogie 47 is a pipe shaft of the different diameter pipe 1. Return-type third hydraulic cylinder 48 that reciprocates along the core direction
And the first hydraulic pump P.
In the hydraulic circuit from the first hydraulic cylinder 48 to the third hydraulic cylinder 48, a four-port three-position switching type third switching valve 49 is connected. Then, the third switching valve 49 is switched from the neutral operation position to the forward operation position, and the pressure oil from the first hydraulic pump P1 is moved to the first cylinder chamber 48a of the third hydraulic cylinder 48 on the forward side.
The carriage 47 is moved forward by the expansion operation of the third hydraulic cylinder 48, and the third switching valve 49 is switched from the neutral operation position to the reverse operation position to operate the pressure from the first hydraulic pump P1. When oil is supplied to the second cylinder chamber 48b on the reverse side of the third hydraulic cylinder 48, the carriage 47 moves backward due to the contraction operation of the third hydraulic cylinder 48. Therefore, even if the tube axis length differs depending on the type and size of the different diameter pipe 1, the center of gravity position of the different diameter pipe 1 is adjusted to the base by adjusting the movement of the carriage 47 in the front-back direction by the base horizontal moving device D. 2 allows stable support.

The base lifting / lowering drive device E is shown in FIGS.
As shown in FIG. 4, the lifting table 5 to which the base 2 is attached
1, a lifting guide shaft 52 that guides the lifting platform 51 so that it can be lifted up and down relative to the carriage 47, and a pair of left and right fourth hydraulic cylinders 53 that drive the lifting platform 51 up and down with respect to the carriage 47. In addition, in the hydraulic circuit from the first hydraulic pump P1 to the fourth hydraulic cylinder 53, a four-port three-position switching type fourth switching valve 54 is connected. When the fourth switching valve 54 is switched from the neutral operation position to the raising operation position and the pressure oil from the first hydraulic pump P1 is supplied to the ascending side first cylinder chamber 53a of the fourth hydraulic cylinder 53, As the fourth hydraulic cylinder 53 is extended, the elevating table 51 is raised, and the fourth switching valve 54 is switched from the neutral operation position to the lower operation position to release the pressure oil from the first hydraulic pump P1. When supplied to the second cylinder chamber 53b on the lower side of the fourth hydraulic cylinder 53, the elevating table 51 is lowered by the contraction operation of the fourth hydraulic cylinder 53. Therefore, even if the diameter of the different-diameter pipe 1 varies depending on the type and size of the different-diameter pipe 1, by adjusting the height of the lifting platform 51 by the base lifting / lowering drive device E, the pipe axis of the different-diameter pipe 1 and the pipe of the movable platen 12 are adjusted. The holding center of the holding member 14 and the holding center of the pipe holding member 15 of the fixed plate 10 can be easily matched.

[Second Embodiment] FIG. 7 shows the highest position H in the different diameter pipe 1 as the pressure liquid is supplied into the different diameter pipe 1.
Another embodiment of a floating mechanism F for floatingly moving the intake port portion 3a of the discharge pipe 3 is shown at a corresponding position. This is a liquid-tight sealed state in the discharge pipe 3 inside the pipe holding member 15. The pipe portion located in the different diameter pipe 1 is connected to the pipe holding member 1
And a first discharge pipe portion 3A fixed through 5 and a top and bottom connected to the first discharge pipe portion 3A through a first universal joint 3E so as to be vertically swingable around a first horizontal axis X1. Tube 3H made of soft tube that can be bent and moved in the left and right directions
And a second universal joint 3F which is swingable in the tube axis direction within a certain angle range around the second horizontal axis X2 with respect to the flexible tube 3H.
And a fourth discharge pipe portion 3D having an intake port portion 3a formed on the front end side thereof, and the floating member 4 is provided on the intake port portion 3a side of the fourth discharge pipe portion 3D.
Is attached. Further, a weight 7 is attached to the lower surface side of the floating body 4, and the weight 7 is used to face upward the intake port portion 3a of the discharge pipe 3 that floats as the pressure liquid is supplied into the different diameter pipe 1. The flexible tube 3H to the fourth discharge tube portion 3D are provided on the bracket 42 provided on the inner peripheral surface of the tube holding member 15 while constituting attitude holding means for holding the tube in the attitude.
Gutter-shaped support portion 6 for receiving and supporting a movable pipe portion that can move up and down up to a different diameter pipe 1 in a posture in which it can be inserted from the pipe axis direction.
Is provided. Other configurations are the same as the configurations described in the first embodiment.

[Third Embodiment] FIG. 8 shows the highest position H in the different diameter pipe 1 as the pressure liquid is supplied into the different diameter pipe 1.
Another embodiment of a floating mechanism F for floatingly moving the intake port portion 3a of the discharge pipe 3 is shown at a corresponding position. This is a liquid-tight sealed state in the discharge pipe 3 inside the pipe holding member 15. The pipe portion located in the different diameter pipe 1 is connected to the pipe holding member 1
And a first discharge pipe portion 3A fixed through 5 and a top and bottom connected to the first discharge pipe portion 3A through a first universal joint 3E so as to be vertically swingable around a first horizontal axis X1. Tube 3H made of soft tube that can be bent and moved in the left and right directions
And a second universal joint 3F which is swingable in the tube axis direction within a certain angle range around the second horizontal axis X2 with respect to the flexible tube 3H.
And a fourth discharge pipe portion 3D having an intake port portion 3a formed on the distal end side thereof, and the first universal joint 3E and the second universal joint 3F are connected to each other. A connecting member 3J is provided for connecting in a state in which relative swinging around each of the horizontal axis X1 and X2 is allowed, and further, the fourth member
A floating body 4 is attached to the exhaust pipe portion 3D on the intake port 3a side. Further, a weight 7 is attached to the lower surface side of the floating body 4, and the weight 7 is used to face upward the intake port portion 3a of the discharge pipe 3 that floats as the pressure liquid is supplied into the different diameter pipe 1. A bracket 4 provided on an inner peripheral surface of the pipe holding member 15 while constituting a posture holding means for holding the posture.
2, the connecting member 3J is provided so as to hold the movable pipe portion, which is movable up and down, from the flexible pipe 3H to the fourth discharge pipe portion 3D, into the different-diameter pipe 1 in a posture in which it can be inserted from the pipe axis direction. There is provided a plate-shaped support portion 6 for receiving and supporting. Other configurations are the same as the configurations described in the first embodiment.

[Fourth Embodiment] FIG. 9 shows another embodiment of the intake port portion 3a of the discharge pipe 3, in which the fourth discharge pipe portion is provided at the tip of the fourth discharge pipe portion 3D. An intake pipe portion 3K, which is slidably movable within a certain range in the axial direction of the pipe axis of 3D, is externally fitted, and the intake pipe portion 3K is provided on the protruding side between the intake pipe portion 3K and the fourth discharge pipe portion 3D. Coil spring 3 for urging movement
L is installed inside, and the intake port portion 3a is formed through the front end surface of the intake pipe portion 3K.
When the opening peripheral edge of the intake pipe portion 3K abuts the inner surface of the different diameter pipe 1 due to floating movement to a position corresponding to the highest position in the different diameter pipe 1, the highest position inside the different diameter pipe 1 A notch 3b for sucking air present at a considerable place is formed. When the opening peripheral edge of the intake pipe portion 3K contacts the inner surface of the different diameter pipe 1 due to the floating movement to a position corresponding to the highest position in the different diameter pipe 1, and the pressure acts on the intake pipe portion 3K, The tube portion 3K is configured to be contracted against the biasing force of the coil spring 3L. Other configurations are the same as the configurations described in the first embodiment.

[Fifth Embodiment] FIG. 10 shows the discharge pipe 3
2B shows another embodiment of the air intake portion 3a of
An intake pipe portion 3K, which is slidably movable within a certain range in the axial direction of the pipe axis of the fourth discharge pipe portion 3D, is fitted onto the tip end portion of the discharge pipe portion 3D. The coil spring 3 for urging the intake pipe portion 3K to move toward the protruding side between the portion 3D and the portion 3D.
L is installed inside, and the tip end surface of the intake pipe portion 3K can be elastically deformed when it comes into contact with the inner surface of the different diameter pipe 1 by floating movement to a position corresponding to the highest position in the different diameter pipe 1. The plurality of elastic intake pipes 3M are connected to each other, and the plurality of elastic intake pipes 3M constitute the intake port portion 3a. When the plurality of elastic intake pipes 3M come into contact with the inner peripheral surface of the different diameter pipe 1, each elastic intake pipe 3M elastically bends and deforms substantially radially along the inner peripheral surface of the different diameter pipe 1. On the other hand, the air existing at the highest position in the different diameter pipe 1 is sucked. The expansion / contraction function of the intake pipe portion 3K is substantially the same as the expansion / contraction function described in the fourth embodiment, and other configurations are the same as the configurations described in the first embodiment. In addition, in the fifth embodiment, the plurality of elastic intake pipes 3M are provided, but one elastic intake pipe 3M may be provided.

Other Embodiments In each of the above-mentioned embodiments, the intake port moving mechanism F is
As the pressure liquid is supplied into the different diameter pipe 1, the different diameter pipe 1
The air intake port 3a of the discharge pipe 3 is floatingly moved to a position corresponding to the highest position in the inside of the floating mechanism, but the discharge is carried out to the position corresponding to the highest position in the different-diameter pipe and the position allowing the removal of the different-diameter pipe. It may be configured by a drive lifting mechanism for forcibly moving the intake port 3a of the pipe 3 up and down. The pipe portion of the discharge pipe 3 projecting into the different-diameter pipe 1 may be configured to be stored and moved in the passage 19 during a non-hydraulic pressure test.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is an overall side view of a hydraulic testing machine for different diameter pipes showing a first embodiment of the present invention.

[Fig. 2] Overall plan view of hydraulic tester for different diameter pipes

FIG. 3 is a sectional view taken along line III-III of FIG.

FIG. 4 is an enlarged vertical sectional view of a main part.

[Fig. 5] Hydraulic circuit diagram

[Figure 6] Enlarged view of the floating mechanism with some cutouts

FIG. 7 is a partially cutaway enlarged view of a floating mechanism showing a second embodiment of the present invention.

FIG. 8 is a partially cutaway enlarged view of a floating mechanism showing a third embodiment of the present invention.

FIG. 9 is an enlarged cross-sectional view of an intake port section showing a fourth embodiment of the present invention.

FIG. 10 is an enlarged cross-sectional view of an intake port section showing a fifth embodiment of the present invention.

[Explanation of symbols]

 A Sealing device B Pressure liquid supply device C Air discharge device F Intake port moving mechanism (floating mechanism) 1 Different diameter pipe 1a Opening 2 Base 3 Discharge pipe 3H Flexible pipe 3M Elastic suction pipe 3a Intake port 4 Floating body 5 Length adjustment part 6 Support part 7 Posture holding means (weight)

Claims (9)

[Claims] 1. A base (2) for mounting and supporting a different-diameter pipe (1) whose inner diameter changes in the axial direction of the pipe in a horizontal posture, and a different-diameter pipe mounted and supported on the base (2). Opening (1)
A sealing device (A) that can be switched between a sealed state in which a) is closed in a liquid-tight state and an opened state in which it is separated from the opening (1a) of the different diameter pipe (1), and the sealing device (A). A pressure liquid supply device (B) for supplying a pressure liquid into the closed different diameter pipe (1), and a pressure liquid supply device (B) for supplying the pressure liquid into the different diameter pipe (1) An air discharge device (C) having a discharge pipe (3) for guiding the discharge of air to the outside is provided, and an intake port portion of the discharge pipe (3) is provided at a position corresponding to the highest position in the different diameter pipe (1). A hydraulic testing machine for different-diameter pipes provided with an intake port moving mechanism (F) for moving (3a). 2. The different diameter pipe (1) is provided by the suction port moving mechanism (F) as the pressure liquid is supplied into the different diameter pipe (1).
The hydraulic testing machine for a different diameter pipe according to claim 1, wherein the hydraulic pressure testing device is a floating mechanism for floatingly moving the intake port portion (3a) of the discharge pipe (3) to a position corresponding to the highest position therein. 3. In the floating mechanism (F), at least a part of the discharge pipe (3) located in the different diameter pipe (1) is vertically movable. The hydraulic testing machine for different diameter pipes according to claim 2, wherein a float (4) is attached to the intake pipe (3a) side of the discharge pipe (3). 4. In the floating mechanism (F), at least a part of the discharge pipe (3) located in the different diameter pipe (1) can be bent and moved in the vertical direction. The flexible pipe (3H), and the discharge pipe (3)
3. The hydraulic testing machine for different diameter pipes according to claim 2, further comprising a floating body (4) provided on the intake port side (3a) side. 5. A length adjusting portion (5) capable of adjusting expansion and contraction within a certain range is provided in a pipe portion of the discharge pipe (3) located in the different diameter pipe (1). The hydraulic testing machine for different diameter pipes according to any one of 2 to 4. 6. The different diameter according to claim 1, further comprising posture holding means (7) for holding the intake port portion (3a) of the discharge pipe (3) in an upward posture. Hydraulic tester for pipes. 7. A support portion for receiving and supporting, in the sealing device (A), a movable pipe portion of the discharge pipe (3) that can move up and down in a posture in which it can be inserted into the different diameter pipe (1). 6) is provided, The hydraulic testing machine for different diameter pipes of any one of Claims 2-6. 8. The intake port (3a) of the discharge pipe (3)
The different diameter pipe according to any one of claims 2 to 7, wherein the different diameter pipe (1) is formed of an elastic intake pipe (3M) that is elastically deformable by contact with the inner surface of the different diameter pipe (1). Hydraulic testing machine. 9. The hydraulic testing machine for different diameter pipes according to claim 6, wherein the posture holding means (7) is a weight provided on the floating body (4).