JPS617441A - Pressure testing apparatus of flexible hose - Google Patents

Abstract

PURPOSE:To conduct the pressure test of a flexible hose under the cut state without attaching connecting metal fixtures and the like at the end parts, by inserting a nozzle in the inner hole of the flexible hose, and holding the hose by a chuck. CONSTITUTION:Both end parts of a rubber hose 66 are coupled into the base end part of each nozzle 58. Then compressed air is fed through a port 20. A pawl 44 is moved in the left direction, and the rubber hose 66 is temporarily tightened. When pressure water as a fluid is fed intp a chamber 26 through a port 30 and a flow path 26, the pawl 44 is forther moved leftward and the hose is tightened in a practical mode. The pressure water from a pressure tesing apparatus 68 on the right side is fed to the chamber 26 through a through hole 56 and a flow path 62 in a pressure testing apparatus 68 on the left side. Thus the practical tightening is performed. When the pawl 44 is stopped, the inside of the hose is filled with the pressure water. When the pressure is increased to a specified value, whether the water leaks from the hose or not is checked. Thus the pressure test is finished.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a pressure test device for flexible hoses such as rubber hoses, and in particular, a device for removably gripping flexible hoses that do not have connecting fittings attached to their ends. The present invention relates to a flexible hose pressure test device that tests by pumping high-pressure fluid.

[Prior Art] Conventionally, pressure resistance tests on high-pressure rubber hoses and the like were carried out by caulking connecting fittings onto the rubber hoses, etc. and then connecting them to a pressure resistance testing device, and after the test was completed, the connecting fittings were cut and removed before being shipped. Therefore, not only can the disconnected fittings not be reused, but the rubber hoses and other parts are also cut off at the same time, which results in wasted materials.In addition, it takes time and effort to install and remove the connecting fittings, which increases costs. There was a point.

[Object of the Invention] The present invention has been made against the background of the above-mentioned circumstances, and an object of the present invention is to provide a flexible hose that remains cut without attaching a connecting fitting or the like to the end thereof. An object of the present invention is to provide a flexible hose pressure test device that can perform a pressure test.

[Structure of the Invention] The gist of the present invention, which has been made to achieve such an object, is to removably grasp the end of a flexible hose and to perform inspection by pumping fluid into the hose. A flexible hose pressure test device, wherein a plurality of gripping claws are slidably fitted into tapered holes provided in a main body member, and the hose end portion is moved relative to the main body member. a chuck capable of gripping or releasing the fluid; a fluid pressure cylinder device capable of reciprocating the gripping claw; and a fluid pressure cylinder device disposed on a connecting member that connects the piston of the fluid pressure cylinder device and the gripping claw, and configured to be pressurized into a rubber hose. a fluid pressure cylinder device capable of reciprocating the gripping claw using the inspection fluid to be tested as a working fluid; and a fluid pressure cylinder device disposed at the center of the gripping claw, capable of being inserted into the end of the inner hole of the hose and capable of feeding fluid. The reason is that it is configured with a nozzle and.

[Example] An example of the present invention will be described in detail below based on the drawings.

In FIG. 1, 10 is a main body, and a cylinder 12 is fitted into a circular protrusion protruding from one end of the main body.
A piston 18 attached to a rod portion 16 formed at the end of the connecting member 14 is slidably fitted in the cylinder 12, and compressed air is supplied and discharged from the boat 20° 22 to close the connecting member. 14 is capable of reciprocating. In this way, an air cylinder device as a fluid pressure cylinder device is configured. In this embodiment, the pressure of the compressed air is 3 to 4 kQr/-.

A stepped through hole is formed in the main body 10, and a rod portion 1 formed in the connecting member 14 is inserted into each stepped through hole.
6, and a piston portion 24 whose diameter is larger than that of the rod portion 16.
and are slidably fitted. A chamber 26 surrounded by the stepped inner surface of the through-hole and the outer surface of the connecting member 14 communicates with the port 30 via a flow path 28, and is supplied with high pressure from a high pressure water supply device (not shown). It is provided that pressurized water can be pumped. In this example, the pressure of the pressure water is approximately 300k.
of/- and the pressurized water pumped into the entire 26 moves the connecting member 14, which has been moved to the left (upward in FIG. 1) by the cylinder device, to the left with even stronger force. In this way, a hydraulic cylinder device as a fluid pressure cylinder device is constructed.

A coupling member 32 is provided on the protrusion protruding from the other end of the main body 10.
One end of the coupling member 32 is fitted, and the other end of the coupling member 32 is fitted with a main body member 36 having a tapered hole 34, and the cylinder 121 main body 10 and the main body member 36 are integrally connected by a tie rod 38 shown in FIG. installed. On the other hand, a mounting member 40 is fitted to the distal end of the connecting member 14, and is prevented from coming off by a set screw 42.
Three gripping claws 44 are attached to the side surface of.

As shown in FIG. 3, the gripping claw 44 is formed so that its outer side follows a part of the tapered curved surface so that it can come into sliding contact with the tapered hole 34 of the main body member 36, and its end portion 46 is shaped to fit within the radius of the mounting member 40. It is possible to move in the direction. As shown in FIG. 3, mounting holes 52 for the compression coil springs 50 are provided on both sides of the gripping claws 44.
is drilled. A spring 50 is provided between each adjacent pawl 44.
is attached, and the winter melon 44 is urged to move along the inner periphery of the tapered hole 34. Therefore, the claws 44 are always biased so that their outer surfaces come into contact with the tapered holes 34, and the gripping diameter of the gripping portion formed inside each claw 44 is expanded. Reference numeral 54 denotes a ring for preventing the claws 44 from expanding and popping out from the mounting member 40 and for adjusting the gripping diameter when the connecting member 14 moves to the left. Note that a gripping surface with a wavy cross section is formed on the inside of the claw 44.
It is designed to securely grip flexible hoses such as rubber hoses. In this way, the chuck 45 is constructed. When the connecting member 14 moves to the left, the claws 44 are acted upon by the tapered hole 34 and move in a direction where the gripping diameter becomes smaller, and when the connecting member 14 moves in the opposite direction, the claws 44 move in a direction where the gripping diameter becomes larger. .

A nozzle 58 having a through hole 56 that can feed pressurized water to the center is screwed onto one end of the connecting member 14, and the nozzle 58 passes through the flow passage 60, 62 provided in the connecting member 24 to the inside of the chamber 26. It is designed to be able to pump pressurized water. In addition, the nozzle 58
The outer diameter of each claw 44 can fit into the inner hole of a flexible hose such as a rubber hose to be subjected to a pressure test, and the inner diameter of each claw 44 can fit into the inner hole of a flexible hose such as a rubber hose to be subjected to a pressure test.
When the flexible hose moves to the right side, the outer diameter of the flexible hose is sized to fit therein. Reference numeral 61 denotes an annular groove provided in a hole into which the rod portion 16 is fitted, and is communicated with the outside of the main body 10 through a small hole 63. As a result, when the water in the hydraulic cylinder passes through the gap between the O-rings, it is led out to the outside.

The pair of pressure test devices 68 constructed in this manner are mounted on a base 70 with bolts 64, as shown in FIG. However, the pressure test device 68 on the left side does not have the port 30.

Next, a method of using the apparatus of the embodiment will be explained.

First, the withstand voltage test device 68 on the right side of FIG. 4 will be explained. When the claw 44 is moved rightward by the air cylinder, the state shown in FIG. 1 is achieved. Next, after both ends of the rubber hose 66 to be subjected to the pressure test are fitted to the base end of each nozzle 58, when compressed air is supplied from the port 20, the claw 44 moves to the left, The gripping diameter becomes smaller due to the action of the tapered hole 34, and the rubber hose 66 is temporarily tightened. Then, the chamber 26 passes through the port 30 and the flow path 28.
When pressure water is supplied as a fluid, the pawl 44 moves further to the left, and the rubber hose 66 is further tightened to be fully tightened. A virtual line 80 shows a state in which the claw 44 is moved to the left by the cylinder device and grips the hose 66.

Here, the withstand voltage test device 68 on the left side of FIG. 4 will be explained. The movement of the claw 44 by the air cylinder and the temporary tightening of the rubber hose 66 is the same as in the pressure test device 68 on the right side, but the pressure test device 68 on the left side
does not have a port 30, so in order to fully tighten the rubber hose 66, pressure water from the pressure test device 68 on the right side enters the chamber 26 through the through hole 56 and the flow path 62, and the claw 44 further grips it. It moves in the direction of decreasing the diameter and is finally tightened.

Since the nozzle 58 is fitted into the hose inner hole, the claw 4
Coupled with the fact that 4 has a corrugated gripping surface, the hose can be gripped reliably. When the movement of the claw 44 is stopped,
Pressure water fills the inside of the hose and rises to a predetermined pressure (300k (If/crA) in this example).A meter (not shown) confirms that the predetermined pressure has been reached and confirms that water is not leaking from the hose. The pressure test is completed by checking whether or not there is any problem.Next, the supply of pressurized water is stopped and the pressure in the chamber 26 is released, compressed air is sent from the port 22 and the claw 44 is moved. Then, the grip on the hose 66 becomes loose and it becomes possible to remove it from the nozzle 58.

According to this embodiment, after the nozzle 58 is inserted into the inner hole of the hose, it is gripped by the chuck 45, so that the hose can be connected reliably, and the connection fittings used only for the pressure test can be used as in the conventional case. Since there is no need to caulk the hose, the hose can be easily and quickly removed from the pressure test @ position, improving test work efficiency and allowing the hose to be cut and discarded together with the connecting fittings and fittings. This eliminates waste and helps reduce costs. Further, since large movements during temporary tightening are performed using an air cylinder, and final tightening is performed using a hydraulic cylinder, the capacity of the pressure water supply device that requires high pressure can be reduced.

The test fluid is not limited to water, but other liquids and gases can also be used. Furthermore, other fluid pressure cylinder devices may be used instead of the air cylinder device. It goes without saying that the hose to be tested is not limited to rubber hoses, but other flexible hoses can also be used.

Although one embodiment of the present invention has been described above, the present invention is not limited to such an embodiment in any way, and it goes without saying that it can be implemented in various forms without departing from the gist of the present invention. .

[Effects of the Invention] As detailed above, according to the present invention, after the nozzle is inserted into the inner hole of the flexible hose, it is gripped by the chuck, so that the connection of the hose is ensured. In addition, it can be connected to the hose without caulking the connection fittings.
The hose can be easily and quickly attached to and detached from the pressure test equipment, improving test work efficiency. In addition, there is no need to cut off and throw away the end of the hose together with the connecting fittings, reducing costs.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is a side view of the embodiment, Fig. 3 is a perspective view of a gripping claw used in the embodiment, and Fig. 4 is the embodiment. FIG. 3 is a front view showing the state of use. 14...Connecting member 34...Tapered hole 36...Body member 44...Gripping claw 45...Chuck 58...Nozzle 66...Rubber bow (flexible hose) 68...Pressure resistant test equipment

Claims (1)

[Scope of Claims] 1. A flexible hose pressure test device that removably grips the end of a flexible hose and tests it by pumping fluid into the hose, comprising: a taper provided on the main body member; a chuck in which a plurality of gripping claws are slidably fitted into holes and capable of gripping or releasing the hose end by moving relative to the main body member; and a fluid capable of reciprocating the gripping claws. a pressure cylinder device, and a fluid pressure cylinder that is disposed on a connecting member that connects a piston of the fluid pressure cylinder device and a gripping claw, and is capable of reciprocating the gripping claw using a test fluid to be pumped into a rubber hose as a working fluid. A flexible hose pressure test device, comprising: a nozzle that is disposed at the center of the gripping claw and that can be inserted into the end of the inner hole of the hose and can feed fluid.