KR20160003545U - Coupling cap for testing airtightness of a pipe - Google Patents

Coupling cap for testing airtightness of a pipe Download PDF

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Publication number
KR20160003545U
KR20160003545U KR2020150002139U KR20150002139U KR20160003545U KR 20160003545 U KR20160003545 U KR 20160003545U KR 2020150002139 U KR2020150002139 U KR 2020150002139U KR 20150002139 U KR20150002139 U KR 20150002139U KR 20160003545 U KR20160003545 U KR 20160003545U
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KR
South Korea
Prior art keywords
pipe
slider
coupling cap
liquid
housing
Prior art date
Application number
KR2020150002139U
Other languages
Korean (ko)
Inventor
신금순
Original Assignee
신한금속 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 신한금속 주식회사 filed Critical 신한금속 주식회사
Priority to KR2020150002139U priority Critical patent/KR20160003545U/en
Publication of KR20160003545U publication Critical patent/KR20160003545U/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/022—Test plugs for closing off the end of a pipe

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Abstract

The present invention relates to a coupling cap for a pipe airtightness test for testing whether or not a welded portion of a tubular pipe is airtight. More specifically, a compression spring is provided in a liquid passage of a slider so as to fill a high- A rotary ball is provided between the cam and the slider to smooth the operation of the eccentric lever and a plurality of O-rings and washers are provided between the slider and the collet to engage with the outer peripheral surface of the pipe, To a test coupling cap.

Description

Coupling Cap for Pipe Pneumatic Test {Coupling cap for testing airtightness of a pipe}

The present invention relates to a coupling cap for a pipe-tightness test, and more particularly, to a coupling cap for a pipe-tightness test in which a compression spring is provided in a liquid passage of a slider so as to fill a high-pressure liquid and a rotary ball is provided between the eccentric cam and the slider To a coupling cap for a pipe-tightness test in which leakage is prevented smoothly.

The tube pipe is manufactured by welding a steel plate through a multi-stage roller without using a pipe shape. Such pipe (hereinafter referred to as "pipe") is formed by rolling a steel sheet, so that a weld line is formed along the longitudinal direction.

However, if welding failure occurs in such a welding line, leakage occurs in the welding line. Accordingly, in order to confirm whether the welding line of the pipe has been welded conventionally, a coupling cap for a pipe tightness test is installed at both ends of the pipe, and an airtightness test of a pipe for observing whether gas is leaked after filling the inside of the pipe .

Such a coupling cap for pipe airtightness testing is coupled to both ends of the pipe and has a structure in which the collet portion pressurizes the outer surface of the pipe by the slip motion between the inclined surfaces when the slider is advanced by the eccentric lever.

Conventional coupling cap for pipe airtightness testing has advantages that it is easy to use and can be manufactured in a small size because a complicated internal structure is not introduced, and it is easy to carry and production cost is low.

However, as shown in FIG. 11, the conventional coupling cap for pipe hermeticity testing 200 is designed to fill a gas inside the pipe, and thus there is a limit to testing the airtightness of the high-pressure pipe. That is, in the conventional coupling cap 200, an o-ring is provided between the slider, the pipe, and the slider and the collet portion to block gas leakage. However, when a high-pressure liquid is used, There was a problem.

Since the eccentric cam of the eccentric lever 53 is directly in contact with the rear surface of the slider, the coupling cap 200 for a conventional pipe airtightness test, when the high-pressure liquid is filled inside the slider and the pipe, There is a problem that the eccentric lever is not smoothly operated.

Further, since the coupling cap 200 for pipe hermetic test according to the related art is filled with gas into the pipe, the length of the gas passage 222 is short, but when filling a liquid having a relatively large specific gravity, There is a problem that a passage is required.

(0001) Korean Utility Model Publication No. 20-0444547 (Registered on May 05, 2009)

The main object of the present invention is to provide a coupling cap capable of filling a liquid so as to be suitable for a hermetic test of a high-pressure pipe.

The present invention also provides a coupling cap for a pipe airtight test in which leakage of water does not occur even when a high-pressure liquid is used and operation of the eccentric lever is smooth.

As a means for achieving the object of the present invention, a coupling cap for a pipe tightness test according to the present invention,

Claims [1] A coupling cap for a pipe tightness test which is installed at both ends of a pipe to test the airtightness of the pipe,

A housing defining a first inner space of a predetermined size;

A slider configured to be slidable in a first inner space of the housing and having an inner inclined surface inclined at a predetermined angle to form a second inner space having a larger diameter toward the outside;

And a plurality of pressure plates formed in a shape having an outer inclined surface corresponding to the inner inclined surface so as to be partially inserted into the second inner space of the slider and capable of sliding along the inner inclined surface, A collet portion;

An eccentric lever rotatably installed at a rear end of the housing and including an eccentric cam for pressing the rear surface of the slider and a lever protruding outside the eccentric cam;

And a cover which covers an opening portion of the housing to receive the collet portion and has a through hole through which the pipe passes,

The slider includes a liquid passage having a predetermined length connected to a liquid inlet through which liquid to be filled into the pipe flows, and a coil-shaped compression spring is installed in the liquid passage,

The liquid inlet has a receiving groove formed at the tip thereof with a diameter larger than the diameter of the liquid inlet, and the receiving groove is provided with an O-ring and a washer in close contact with the outer peripheral surface of the pipe.

In addition, in the present invention, a rotating ball is provided between the eccentric cam and the slider, and an annular groove for moving the rotating ball is formed on the outer peripheral surface of the eccentric cam, A circular groove is formed.

The coupling cap for testing the airtightness of the pipe according to the present invention having the above-described configuration can fill a high-pressure liquid, thereby enabling a hermetic test of the high-pressure pipe, and does not generate leakage.

In addition, in the present invention, a coil-shaped compression spring is provided in a liquid passage of a slider to provide a restoring force to the slider and the pipe to smooth the operation, and a constant space is always formed in the liquid passage, .

The present invention also provides a rotating ball between the eccentric cam and the slider to smoothly operate the eccentric lever.

In addition, the present invention has the effect of preventing the leakage of the liquid, and preventing the O-ring from being deformed or worn, when the slider is advanced by the eccentric lever and the O-ring and the washer interposed between the slider and the collet portion are in close contact with each other.

1 is a first sectional view showing a coupling cap for a pipe airtightness test of the present invention,
2 is a second sectional view showing a coupling cap for a pipe airtightness test of the present invention,
3 is a cross-sectional view showing a coupling cap for a pipe-tightness test of the present invention,
4 is a cross-sectional view showing the structure of the housing according to the present invention,
5 is a cross-sectional view showing the structure of the slider according to the present invention,
6 is a cross-sectional view showing a structure of a collet portion according to the present invention,
7 is a sectional view showing the structure of the cover according to the present invention,
8 is a sectional view showing an example of a compression spring according to the present invention;
9 is a cross-sectional view showing an O-ring and a washer according to the present invention,
10 is a cross-sectional view showing an eccentric cam according to the present invention
11 is a cross-sectional view showing a coupling cap for a pipe-tightness test according to the prior art.

BRIEF DESCRIPTION OF THE DRAWINGS The objectives, specific advantages, and features of the invention will become more apparent from the following detailed description and the preferred embodiments, which are to be read in connection with the accompanying drawings.

It should be noted that, in the specification of the present invention, the same reference numerals as in the drawings denote the same elements, although they are shown in different drawings, if possible. Also, the terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. In the following description of the present invention, a detailed description of known related arts will be omitted when it is determined that the gist of the present invention may be unnecessarily obscured.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the structure of a coupling cap for a pipe tightness test according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 are sectional views showing the internal structure of a coupling cap for a pipe airtight test according to the present invention. Particularly, FIG. 3 shows a state in which the slider 20 advances by operating the eccentric lever 50. FIG.

The coupling cap 1 (hereinafter, referred to as "coupling cap") for testing the pipe tightness of the present invention is provided at both ends of a pipe 2 having a predetermined length to test whether the pipe is air- A housing 10 which forms a first internal space 11 of a predetermined size and an internal inclined surface 22 which is slidably installed in the first internal space 11 of the housing 10 and inclined at a predetermined angle A slider 20 for forming a second internal space 21 whose diameter gradually increases toward the outside and a second internal space 21 for receiving a part of the slider 20 along the internal inclined surface 22 A collet portion 30 formed with an outer inclined surface 32 corresponding to the inner inclined surface 22 so as to be slidable and a hollow portion 31 through which the pipe 2 passes, The slider 20 is rotatably installed at a rear end of the slider 20, An eccentric lever 50 composed of an eccentric cam 51 for pressing and a lever 52 protruding outside the eccentric cam 51 and an eccentric cam 50 for covering an opening of the other end of the housing 10, And a cover 60 having a through hole 61 through which the pipe 2 passes.

The coupling cap 1 is fixed to both ends of the pipe 2, and after the liquid is injected into the pipe 2, the pressure change of the liquid is measured using a separate pressure measurement sensor, Can be tested.

The housing 10 forms an outer appearance of the coupling cap 1 according to the present invention. The housing 10 has a cylindrical shape, and a first inner space 11 of a predetermined size is formed therein. The first inner space 11 is opened to one side and the slider 20 can be inserted.

The slider 20 is installed so as to reciprocate linearly in the first inner space 11 of the housing 10. The slider 20 has a cylindrical shape, and a second inner space 21 is formed therein. The second inner space 21 is composed of an inner inclined surface 22 inclined at a predetermined angle and has an enlarged diameter toward the outer side. The second internal space 21 may be opened to one side and a part of the collet portion 30 may be inserted.

The collet portion (30) is inserted into the second inner space (21) of the slider (20). An outer inclined surface 32 corresponding to the inner inclined surface 22 of the slider 20 is formed in the front portion of the collet portion 30. A hollow portion 32 through which the pipe 2 passes is formed in the center of the collet portion 30. [ (31) are formed.

The eccentric lever (50) is rotatably installed at the rear end of the housing (10) to press the slider (20). The eccentric lever 50 includes an eccentric cam 51 rotatably installed in the housing 10 and a lever 52 fixed to the eccentric cam 51.

The cover (60) is installed to cover the opening (13) of the housing (10). A through hole 61 is formed in the center of the housing 10 to receive the collet 30 and to be inserted into the center of the housing 10.

2, a liquid inlet 25 for supplying liquid into the pipe 2 fixed to the collet portion 30 is formed on the outer circumferential surface of the slider 20. As shown in FIG. A liquid supply hose 24 for supplying liquid, which is supplied from a pump (not shown), to the slider 20 is connected to the liquid inlet 25.

The slider 20 has a liquid passage 26 in which the liquid inlet 25 is connected and the end of the pipe 2 is inserted to a predetermined length. The liquid passage 26 has a diameter allowing the pipe 2 to be inserted therein. A coil-shaped compression spring 70 is installed in the liquid passage 26.

At the front end of the liquid passage (26), a receiving groove (27) having a larger diameter than the liquid passage (26) is formed. A step 28 having a predetermined height is formed between the liquid passage 26 and the receiving groove 27. In the receiving groove 27, an O-ring 80 and a washer 90 which are in close contact with the outer circumferential surface of the pipe 2 are sequentially installed. For example, the O-ring 80 and the washer 90 are ring-formed, and two O-rings 80 and washers 90 can be sequentially installed.

A rotating ball 40 is provided between the eccentric cam 51 and the slider 20. An annular groove 55 is formed on an outer circumferential surface of the eccentric cam 51 so that the rotary ball 40 can move. A circular groove 45 is formed in the slider 20 to receive the rotary ball 40, .

As described above, the coupling cap 1 according to the present invention is provided with the coil spring compression spring 70 in the liquid passage 26, and the rotating ball 40 Is provided to smoothly operate the eccentric lever 50 and to provide an elastic restoring force to the slider 20 at the time of advancing the slider as well as to form a constant space in the interior of the liquid passage 26, It is smooth to do.

In the present invention, the O-ring 80 and the washer 90 interposed between the slider 20 and the collet portion 30 and the washer 90 come into close contact with each other when the slider 20 is advanced, Thereby preventing the high-pressure liquid from leaking.

More specifically, as shown in FIG. 4, the housing 10 is formed in a cylindrical shape, and a first internal space 11 having a predetermined size is formed therein. One end of the first inner space 11 is formed with an opening 13 so that the slider 20 and the collet 30 can be inserted.

At the other end of the housing 10, a cutout 12 is formed in which the eccentric cam 51 is installed. The cutout portion 12 is formed with a fixing hole 15 to which a central shaft 53 passing through the eccentric cam 51 is fixed. At this time, the cut-off portion 12 is formed with a connecting passage 16 so that the rotating ball 40 can pass through the first inner space 11. [ Therefore, the eccentric cam 51 installed in the cut-out portion 12 can press the slider 20 provided in the first inner space 11 through the rotating ball 40.

An upper slot 17 through which the liquid supply hose 24 engaging with the liquid injection port 25 passes is formed on the outer peripheral upper surface of the housing 10. Therefore, the liquid supply hose 24 coupled to the liquid inlet 25 during the forward and backward movement of the slider 20 can freely perform a linear movement in the upper elongated hole 17. A lower elongated hole 18 is formed on the lower surface of the housing 10 in the longitudinal direction of the housing 10 so that the rotation preventing tab 29 passes through the lower elongated hole 18, (29). Therefore, when the slider 20 is moved back and forth, the rotation prevention tab 29 prevents the slider 20 from rotating and allows linear movement back and forth.

Next, as shown in FIG. 5, the slider 20 has a cylindrical structure with one side open and the other side closed. A second inner space 21 formed of an inner inclined surface 22 inclined at a predetermined angle is formed in the slider 20. A part of the collet portion 30 of the second internal space 21 is opened to be inserted. A liquid inlet 25, a liquid passage 26, and a receiving groove 27 are formed in the slider 20 so as to communicate with each other. A circular groove 45 is formed in the rear surface of the slider 20 to accommodate the rotary ball 40. A slider 20 is provided on the lower surface of the slider 20 to linearly move in the longitudinal direction of the housing 10, The rotation preventing tab 29 is provided.

6, the collet portion 30 includes an outer inclined surface 32 corresponding to the inner inclined surface 22 of the second inner space 21, and a pipe 2 passing through the center thereof And a plurality of divided pressure pieces 34 forming a hollow portion 31 so that the hollow portion 31 can be formed. Preferably, the pressing piece 34 may be composed of three or more but in the present invention, five. The pressing pieces 34 are resiliently connected to each other through a plurality of springs 35. Preferably, a groove for inserting the spring 35 is formed on the opposite surface of the pressing piece 34.

The collet portion 30 having such a structure is configured such that the pressing piece 34 slides on the inclined inner surface 22 of the slider 20 during the forward and backward movement of the slider 20 so that the pressing pieces 34 are opened or tightened, The collet portion 30 hollow portion 31 is expanded or contracted. That is, when the pipe 2 is inserted or withdrawn, the hollow portion 31 is expanded so that the pipe 2 can pass smoothly. When the pipe 2 is fixed, the hollow portion 31 is contracted, (2).

7, the cover 60 is fixed to the opening 10 of the housing 10 in a state where the slider 20 and the collet 30 are mounted inside the housing 10, They are joined by fastening. A through hole 61 through which the pipe 2 can be inserted is formed in the center of the cover 60. The cover 60 can be moved in the forward and backward directions at the end of the housing 10 by the rotation action, and the space inside the housing 10 can be expanded and contracted by rotating the cover 60 .

Next, a compression spring 70 as shown in FIG. 8 is installed in the liquid passage 26 formed inside the slider 20. As shown in FIG. Therefore, when the pipe 2 is inserted through the hollow portion 31 of the collet portion 30, the tip of the pipe 2 presses the compression spring 70 inserted in the liquid passage 26. When the slider 20 is moved toward the collet portion 30, the compression spring 70 is compressed to have an elastic restoring force.

An O-ring 80 and a washer 90 as shown in FIG. 9 are installed in the receiving groove 27 formed at the tip of the liquid passage 26 of the slider 20. Therefore, when the pipe 2 is inserted through the hollow portion 31 of the collet portion 30, the O-ring 80 and the washer 90 wrap the outer circumferential surface of the pipe 2. When the slide 20 is moved toward the collet portion 30, the O-ring 80 interposed between the collet portion 30 and the step 28 closely contacts the washer 90, 80 from being deformed.

As shown in FIG. 10, the eccentric lever 50 includes an eccentric cam 51. The eccentric cam 51 is provided with a fixing hole 57 to which the center shaft 23 is fixed and a fixing groove 56 for fixing the lever 52 is provided on one side. An annular groove 55 is formed on the outer circumferential surface of the eccentric cam 51 so that the rotating ball 40 can move.

Therefore, the slider 20 moves back and forth through the eccentric lever 50 rotatably installed in the housing 10. That is, when the lever 52 is horizontally laid down, the slider 20 is retracted leftward in the housing 10. Conversely, when the lever 52 is vertically erected, the eccentric cam 51 presses the slider 20 to move the slider 20 toward the collet portion 30 where the pipe 2 is located. At this time, a rotating ball 40 is provided between the eccentric cam 51 and the slider 20 to facilitate the rotation operation of the eccentric cam 51.

A method of testing the airtightness of a pipe using the coupling cap 1 of the present invention having the above-described configuration will now be described.

First, the coupling cap 1 of the present invention is coupled to both ends of the pipe 2 to be subjected to the airtightness test. That is, when the end of the pipe 2 is inserted into the through hole 61 formed in the center of the cover 60 of the coupling cap 1 with the lever 52 lying horizontally, 2 is inserted into the inlet of the liquid passage 26 of the slider 20 through the hollow portion 31 of the collet portion 30, the O-ring 80 and the washer 90. At this time, the tip of the pipe (2) presses the compression spring (70) inserted in the liquid passage (26).

When the lever 52 is vertically erected, the rotating ball 40 presses the rear surface of the slider 20 in accordance with the rotation of the eccentric cam 51, and the slider 20 Is caused to slide on the outer inclined surface (32) of the collet portion (30). When the slider 20 is moved to the right by a predetermined distance L, the pipe 20 passing through the hollow portion 31 of the collet portion 30 is fixed and the compression spring 26 is pressed. The o-ring 80 and the washer 90 interposed between the collet 30 and the step 28 of the slider 20 are brought into close contact with each other.

When the slider 20 is moved to the right and the O-ring 80 and the washer 90 are in close contact with each other, high-pressure liquid is injected through the liquid supply hose 24 connected to the liquid inlet 25. That is, the liquid supplied through the liquid inlet 25 is injected into the interior of the pipe 2 through the liquid passage 26. At this time, the compression spring 70 forms a space in the liquid passage 26, so that the liquid can smoothly flow into the pipe.

In this state, the coupling cap 1 is hermetically fixed to the end of the pipe 2, and the pump is operated to fill the pipe 2 with a predetermined pressure. That is, the liquid is appropriately filled in the pipe 2 while visually checking the pressure of the liquid filled into the pipe 2 through a pressure gauge (not shown) connected to the liquid supply hose 24.

Thereafter, the pressure of the liquid filled in the pipe 2 is measured by using a pressure recorder (not shown) after the inside of the pipe 2 is filled with the liquid of the appropriate pressure. When the measured value of the pressure recorder is changed, it is judged that the weld line of the pipe 2 is not sealed, and when the measured value is not changed, the weld line of the pipe 2 is sealed.

As described above, the coupling cap 1 for pipe airtightness test of the present invention is a simple and fast method for airtight testing through a simple process of rotating and locking the eccentric lever 50 while being fitted to both ends of the pipe 2 .

The coupling cap 1 for testing the airtightness of the pipe of the present invention is provided with a compression spring 70 in the form of a coil in the liquid passage 26 and a pipe 2 inserted into the liquid passage 26 And the resilient restoring force is given to the slider 20 when the slider 20 is advanced by the eccentric lever 50.

In addition, in the present invention, a rotating ball is provided between the eccentric cam 51 and the slider 20 to facilitate the operation of the eccentric lever 50 so that high-pressure liquid can be easily charged.

In the present invention, an O-ring 80 and a washer 90 provided on the outer circumferential surface of the pipe 2 are provided between the slider 20 and the collet 50 to prevent leakage of the liquid.

While the present invention has been described with reference to preferred embodiments thereof, it should be understood that the present invention is not limited to the above-described embodiments, but various changes and modifications may be made by those skilled in the art within the scope of the technical idea of the present invention This is possible.

1: Coupling cap 2: Pipe
10: housing 11: first inner space
12: incision section 17: upper section
18: lower slot 20: slider
21: second inner space 23: inner inclined surface
25: liquid inlet 26: liquid passage
27: receiving groove 29: rotation prevention tab
30: collet portion 31: hollow portion
34: pressing piece 35: spring
40: rotating ball 45: circular groove
50: eccentric lever 51: eccentric cam
52: lever 53: fixed shaft
60: cover 61: through hole
70: compression spring 80: O-ring
90: Washer

Claims (4)

1. A coupling cap for a pipe tightness test for testing the tightness of a pipe by being coupled to both ends of the pipe,
Claims [1] A coupling cap for a pipe tightness test which is installed at both ends of a pipe to test the airtightness of the pipe,
A housing defining a first inner space of a predetermined size;
A slider configured to be slidable in a first inner space of the housing and having an inner inclined surface inclined at a predetermined angle to form a second inner space having a larger diameter toward the outside;
And a plurality of pressure plates formed in a shape having an outer inclined surface corresponding to the inner inclined surface so as to be partially inserted into the second inner space of the slider and capable of sliding along the inner inclined surface, A collet portion;
An eccentric lever rotatably installed at a rear end of the housing and including an eccentric cam for pressing the rear surface of the slider and a lever protruding outside the eccentric cam;
And a cover which covers an opening portion of the housing to receive the collet portion and has a through hole through which the pipe passes,
The slider is provided with a liquid passage having a predetermined length connected to a liquid inlet through which the liquid to be filled into the pipe flows, and a coil-shaped compression spring is installed in the liquid passage,
Wherein a receiving groove having a diameter larger than the diameter of the liquid inlet is formed at the tip of the liquid inlet, and an O-ring and a washer which are in close contact with the outer circumferential surface of the pipe are sequentially arranged in the receiving groove. Ring cap.
The method according to claim 1,
And an annular groove is formed on the outer circumferential surface of the eccentric cam, and a circular groove is formed in the rear surface of the slider to receive the rotation ball. A coupling cap for testing the tightness of the pipe.
3. The method of claim 2,
Wherein the collet portion comprises five pressing pieces, and a spring is provided between the pressing pieces.
The method of claim 3,
Wherein the O-ring and the washer are installed in the order of the O-ring and the washer with respect to the slider, respectively.
KR2020150002139U 2015-04-03 2015-04-03 Coupling cap for testing airtightness of a pipe KR20160003545U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108709692A (en) * 2018-07-27 2018-10-26 威海邦德散热系统股份有限公司 A kind of air charging system for pipeline air-leakage test
CN115524079A (en) * 2022-04-20 2022-12-27 无锡吉冈精密科技股份有限公司 Long tubular column gas tightness testing arrangement of new energy automobile
CN116424765A (en) * 2023-06-13 2023-07-14 山西溢达科技有限公司 Self-sealing full-automatic hydraulic testing machine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200444547Y1 (en) 2008-10-27 2009-05-19 신한금속 주식회사 Coupling cap for testing airtightness of a pipe

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200444547Y1 (en) 2008-10-27 2009-05-19 신한금속 주식회사 Coupling cap for testing airtightness of a pipe

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108709692A (en) * 2018-07-27 2018-10-26 威海邦德散热系统股份有限公司 A kind of air charging system for pipeline air-leakage test
CN108709692B (en) * 2018-07-27 2024-04-12 威海邦德散热系统股份有限公司 A aerating device for pipeline gas tightness detects
CN115524079A (en) * 2022-04-20 2022-12-27 无锡吉冈精密科技股份有限公司 Long tubular column gas tightness testing arrangement of new energy automobile
CN115524079B (en) * 2022-04-20 2023-09-26 无锡吉冈精密科技股份有限公司 New energy automobile long tubular column gas tightness testing arrangement
CN116424765A (en) * 2023-06-13 2023-07-14 山西溢达科技有限公司 Self-sealing full-automatic hydraulic testing machine
CN116424765B (en) * 2023-06-13 2023-08-11 山西溢达科技有限公司 Self-sealing full-automatic hydraulic testing machine

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