JPS60104231A - Fluid leakage testing mechine of pipe or cylinder, and fluid leakage testing method of pipe or cylinder - Google Patents

Abstract

PURPOSE:To close up tightly both ends of a pipe or a cylinder easily, quickly and exactly by providing one set of enclosing means consisting of two pieces, which are inserted into the inside of both the ends of the pipe or the cylinder and close up tightly the inside, and a pressurized fluid supplying means for supplying a pressurized fluid to the inside of the pipe or the cylinder. CONSTITUTION:A fluid leakage testing machine is provided with one set of enclosing means consisting of two pieces A, B, which are inserted into the inside of both ends of a pipe or a cylinder P and close up tightly the inside, and a pressurized fluid supplying means C having a compressor. Also, the enclosing means A and B are contained in three grooves 2, 2... of the outside circumference of a blind member 1, respectively, so that tire members 3, 3... and tube members 4, 4... come to the outside circumferential side and the inside circumferential side, respectively. According to such constitution, both the ends of the pipe or the cylinder can be closed up tightly, easily, quickly and exactly.

Description

[Detailed Description of the Invention] <Background of the Invention> Technical Field The present invention relates to a solution connecting pipe, a fume pipe, a concrete
The present invention relates to a method for testing fluid leakage of pipes and a fluid leakage tester for pipes and other pipes for testing whether or not there are pinholes that may cause fluid leakage at joints of various pipes and other pipes.

Conventional technology: Conventionally, in order to test whether or not there are pinholes that can cause fluid leakage at joints of pipes or other parts, flanges are welded to both ends of the pipe and a short flange is attached to the flanges. Can you tighten the bolts and write a few poems?

The blind flange is directly welded, and the pressure fluid is supplied through the pressure fluid supply path provided in the blind flange, and if the pressure fluid is a liquid, whether the liquid leaks to wet the outer surface of the tubing, and whether the pressure fluid If it was a gas, the method was to apply soapy water to the outside of the tube and see if bubbles formed.

Since this method involves welding flanges or blind flanges, it takes time to weld and remove. Especially when the I'' diameter is large, the time required for welding and removal cannot be ignored.

<Purpose of the Invention> The present invention was devised as a result of intensive research in view of the above-mentioned points, and it is possible to seal both ends of bamboo tubes easily, quickly and reliably, and to connect the tubes by sending pressure fluid inside. To provide a fluid leakage testing method and a fluid leakage testing machine for pipes and tubes, which can test whether there are pinholes that may cause fluid leakage at addition points or other locations.

<Structure of the Invention> The fluid leakage tester for tube tubes and the like of the present invention includes a pair of sealing means inserted into the inside of both ends of the tube tube to seal the inside, and a pressure fluid is supplied to the inside of the tube tube. each of the electrographic means has one or two strips having an outer diameter slightly smaller than the inner diameter of the bamboo tube to be inserted into both ends of the tube and tested.
A tube member that expands by being filled with pressurized fluid from a sealing port provided on the inner circumferential side of each tire member and brings each tire member into close contact with the inner surface of the tube all around. The tire has the same number of grooves as the tire members on its outer peripheral surface, and the grooves include a blind member that accommodates the tire member and the tube member. in short,
The sealing means has one or more grooves on the outer periphery of the tire member, and the tube member is placed on the inner circumferential side of the tire member and both are accommodated in the groove.

A pressure fluid supply path for supplying pressure fluid to the inside of the tube whose both ends are closed by sealing means is provided on the wall surface of the tube or the blind member, and the pressure fluid supply means Pressure fluid is supplied to the inside of the tube through the fluid supply path.

Therefore, the gap between the outer periphery of the blind member at both ends of the tube is sealed by the tire member and the tube member. The tube member tightly adheres to the tire member and acts as a brake to prevent the sealing member from moving in the axial direction, and when the tube member is filled with pressure fluid, it expands and expands the outer tire member radially outward. It serves the purpose of making the entire circumference adhere to the inner surface of the tube.

The tire member has an outer diameter slightly smaller than the inner diameter of the tube to be inserted into both ends of the tube for testing, and when the tube member expands and expands radially outward, it is inserted into the inner surface of the tube. It has an outer diameter that fits tightly around the entire circumference.

The number of tire and tube members to be used is determined by the test pressure.

The supply means for supplying pressure fluid to the tube member includes:
It is preferable that the pressure fluid supply means also serve as the pressure fluid supply means. However, the combination of the switching valve and the gate valve must enable the supply to the tube member and the supply to the inside of the tube cylinder to be carried out independently.

If the groove for accommodating the tire member and tube member of the blind member is formed by cutting out, it is difficult to accommodate endless tire members and tube members, which is not preferable. By mixing and combining the tire member and the tube member so that they fit together, the tire member and the tube member are eventually accommodated in the groove. good. The thickness of the tire member and the gap around the outer periphery of the blind member are determined relative to each other so that the tube member does not jump out of the groove when inflated.

It is preferable that the blind member has a guide ring that moves around the inner surface of the tube and is accommodated concentrically inside the tube.

The tube member has a sealing port for sealing the pressure fluid on the radially center side, like the filling port of a bicycle tire,
This tubular sealing port passes through an opening in the blind member and is connected to a pipe on the outside of the tubing with respect to the blind member, which pipe is connected to a pressure fluid supply means.

Pressure fluid supply means are provided externally to the tubing or from the blind member.

As the pressure fluid supply means, when the pressure fluid is a gas, a compressor is used, and when the pressure fluid is a liquid, a constant pressure pump is installed, or a confinement pump, a constant pressure valve with a safety valve, and a safety valve are connected. A fluid leak tester equipped with a return pipe bypass that can return liquid to the outside may be used.

Note that it is desirable that the blind member is provided with a pressure gauge that can detect whether pressure fluid is supplied to the closed space and the pressure has risen to a predetermined pressure.

To perform a fluid leakage test on tubes using the fluid leakage tester for tubes described in Section 2, both ends of the tube are closed using the tester listed in L. This involves inserting a pair of sealing means into the interior of both ends of the tube, making sure that the middle member is perpendicular to the axis of the tube, and supplying pressurized fluid to the tube. to inflate the tube member, thereby bringing the tire member into close contact with the inner surface of the tube all around. This is done by sealing both ends of the class.

After that, pressurized fluid is supplied to the inside of the tube and the wall of the tube is inspected for pinholes that may cause pressure fluid leakage.

After this inspection is completed, the fluid pressure inside the tubing is lowered and the pressure housing inside the tube member is removed to reduce the diameter of the tire member and separate it from the inner surface of the tubing. All you have to do is remove the fluid leakage tester outside the pipes.

<Example 1> Fig. 1 is a longitudinal cross-sectional side view along the neck axis direction of the tube, showing a state in which the fluid leakage tester for tubes of the present invention is accommodated inside the tube and a fluid leakage test is performed. It is a diagram.

This fluid leak tester includes a pair of sealing means A and B inserted into both ends of a tube P and sealing the inside, and a pressure fluid supply means C having a compressor.

The sealing means A and B are three grooves 2.2 on the outer periphery of the blind member l.
The tire members 3.3, . . . are housed in each of the tire members 4.4, . Each blind member 1 is a cylinder 1 having a flange lla.
Three collars 12.13.14 and two rings 15.16 are fitted alternately on the outer periphery of the collar 12, 13. .3, grooves 2.2, . . . for accommodating the tube member 4.4, @Φ are formed. Tire member 3.3,・
. . , and tube parts 4.4, . The blind member L has pipes P
A guide wheel 5 for rolling on the inner surface of and being accommodated concentrically.
．． 5... is attached.

The tube member 4.4, the sealing port 6.6 for sealing the pressure fluid of It extends toward the center and is connected to a pipe 9.9 extending from the compressor 8.

This compressor 8 has a blind cover 17 of one sealing means A.
The switching valve 21, the gate valve 22, and the gate valve 23 are connected to an air supply path 20 provided through the tube member 3.
3, etc., the supply of high-pressure air to the inside 24 of the tubes is distributed and controlled.

Therefore, in order to perform a fluid leakage test on tubes using the fluid leakage tester for tubes and tubes described in L, first, both ends of the tube and tube P are closed using the tester described in 1-.

Now, when the pair of sealing means A and Bt are inserted into the tube ends of the tubes P, the guide ring 5 supports the blind member l, and thereby,
The tire member 3 is positioned perpendicular to the axis of the tubes P, and a substantially uniform gap is maintained around the outer periphery of the tire member 3.

Next, the switching valve 21 is set so that port a is [open], port b), c
1. Close the gate valve 22, open the gate valve 23 by 1.
If the compressor 8 is operated after closing the tube member 4.4. High-pressure air is supplied to the tube members 4, 4, and the fist .
．． 3. . . . is in close contact with the inner surface of the tubes P over the entire circumference, thereby sealing both ends of the tubes P by the pair of sealing means A and B, and F
) will be.

After that, switch switch ``21'' to port ``14'', R,
If the compressor 8 is operated after the port b is set to 1 open, the gate valve 22 is set to I' closed A, and the t'l cut valve P23 is set to open, the expansion of the tube member 4 is maintained and the Subsequently, both ends of the tube are kept sealed, and high-pressure air from the compressor 8 is supplied to the inside of the tube cheek 24. As a result, the pressure inside the tube cheek 24 increases, and if there is a pinhole in the wall of the tube, high-pressure air will leak, so a leakage test of the tube can be performed by spraying soapy water or the like.

After this inspection is completed, the port C that communicates the switching valve 21 with the atmosphere is opened, and the gate valve 23 is opened.
Open 1 to let the high-pressure air inside the tube cheek 24 escape into the atmosphere from port C, and after sufficiently reducing the electric pressure inside the tube cheek 24, open the gate valve 22! '13JI, by removing the pressure fluid in the tube member 4, the diameter of the tire member 3 is reduced and moved away from the inner surface of the tube cheek, and the fluid leakage tester for the tube is removed from the tube. good.

<Effects of the Invention> As explained hereafter, the fluid leakage tester for pipes according to the present invention has a strip or a strip on the outer periphery of the blind member that has a slight gap 41 between it and the inner periphery of the pipe. Article 2 onwards) a pair of germ-infecting means formed by forming a Z groove and housing the tire member in this groove so that the tire member is placed on the outer circumferential side and the tube member on the inner circumferential side, and a pressure fluid inside the tube tube cheek. and a pressure fluid supply means for supplying pressure fluid to the tube member.The method for testing fluid leakage of pipes according to the present invention includes: inserting a pair of sealing means into both ends of the pipe member, and supplying pressure fluid to the tube member. to inflate the tube member by supplying
This brings the tire member into close contact with the inner surface of the tube cheek all around the tube, sealing both ends of the tube, and then supplies pressurized fluid to the inside of the tube cheek to eliminate pinholes that can cause pressure fluid leakage on the wall of the tube. After the inspection is completed, the fluid pressure inside the tube cheek is lowered and the pressure fluid inside the tube member is released, thereby reducing the diameter of the tire member and separating it from the inner surface of the tube tube cheek. Since the fluid leak tester for pipes is removed from the outside of the pipe, both ends of the pipe can be sealed easily and quickly, and the pipes can be refilled by feeding pressure fluid inside. You can easily test whether or not there are pinholes at any location or elsewhere.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional side view taken along the axial direction of the tube, showing a state in which a fluid leakage tester for tubes according to the present invention is housed inside the tube cheek and a fluid leakage test is performed. P... Tubes. A, B@Φ Sealing means, C... Pressure fluid supply means (8... Compressor), ■... Blind member, 2.2,... Groove, 3.3,... Tire member, 4.4,...・Tube member, 6.6.・・Koji Onuma, patent attorney for Encapsulation Port Patent Sokujin R Kogyo Co., Ltd.

Claims (1)

[Claims] (1) Two pieces inserted into the inside of the tube at both ends to seal the inside 1
It consists of a set of sealing means and a pressure fluid supply means for supplying pressure fluid into the inside of the tube, and each one of the sealing means is slightly smaller than the inside diameter of the tube cheek to be inserted into both ends of the tube for testing. One or more tire members k having an outer diameter are filled with pressurized fluid from the sealing port provided on the inner circumferential side of each tire member, and are expanded to cause each tire member to fill the entire circumference of the inner surface of the tube tube. The pressurized fluid supply means comprises a tube member to be brought into close contact with each other, and a blind member having the same number of grooves as the tire member on its outer peripheral surface and accommodating the tire member and the tube member in the groove. is a fluid leakage tester for pipes (2, Claim No. 1J31
Both ends of the tube are closed using the pipe tube fluid leakage tester described in 1, and then pressure fluid is supplied to the inside of the tube tube so that there is a pinhole in the wall of the tube that causes pressure fluid leakage. After this inspection, the tire member is reduced in diameter and separated from the inner surface of the tube by lowering the fluid pressure inside the tube and then releasing the pressure fluid in the tube. , a method for testing fluid leakage of pipes and tubings, characterized by removing the fluid leakage tester for pipes and tubings outside the pipes.