CN218994655U - Multistage depressurization air tightness testing device - Google Patents
Multistage depressurization air tightness testing device Download PDFInfo
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- CN218994655U CN218994655U CN202222650054.5U CN202222650054U CN218994655U CN 218994655 U CN218994655 U CN 218994655U CN 202222650054 U CN202222650054 U CN 202222650054U CN 218994655 U CN218994655 U CN 218994655U
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Abstract
The utility model discloses a multistage depressurization air tightness testing device which comprises a testing box body, wherein a first pressure stabilizing valve and a second pressure stabilizing valve are arranged in the testing box body, the first pressure stabilizing valve is connected with an air source through a first air pipe, a second air pipe is connected between the first pressure stabilizing valve and the second pressure stabilizing valve, a third air pipe is connected to the second pressure stabilizing valve, a testing joint is connected to the third air pipe, regulating valves are arranged on the first pressure stabilizing valve and the second pressure stabilizing valve, a first air pressure gauge is arranged on the first air pipe, a first air valve and a second air pressure gauge are arranged on the second air pipe, the first air valve is close to the second pressure stabilizing valve, the second air valve is close to the first pressure stabilizing valve, the third air valve is arranged on the third air pipe, the second air valve is close to the testing joint, the third air pressure gauge is close to the second pressure stabilizing valve, an insulating layer in a cable is prevented from being damaged, the detection accuracy is improved, and the repeated detection times are reduced; meanwhile, the influence on the whole quality of the cable is avoided, and the cost is reduced.
Description
Technical Field
The utility model belongs to the technical field of cable production, and particularly relates to a multistage depressurization air tightness testing device.
Background
The test of the air tightness is a performance index of the cable, and the detection process and the requirements are as follows: and continuously filling the gas with a certain pressure into the cable for a period of time, and observing whether the surface of the cable changes or the internal air pressure changes. At present, the detection mode is that compressed air is led into a high-pressure gas cylinder through an air pump, then a detection cable is connected to an air outlet of the high-pressure gas cylinder through a connector, and after a valve of the high-pressure gas cylinder is opened, the air is filled into the cable.
The patent with publication number CN212567842U discloses an air tightness detection device for electric wires and cables, which is characterized in that a second air pipe is arranged on a high-pressure air bottle, a third air pipe is arranged on the second air pipe, and a plurality of fourth air pipes are arranged on the third air pipe, and the second air pipe and the fourth air pipe are connected with the cables during detection, so that the effect of simultaneously detecting the air tightness of the electric wires and cables with different specifications is achieved.
The insulating layer inside the aluminum pipe coaxial cable is produced by adopting a foaming process, small air holes are distributed in the insulating layer and on the surface of the insulating layer, the high-pressure resistance is poor, the insulating layer is broken by air flow and is damaged by the cable when the insulating layer is subjected to slightly larger air pressure, and the detection effect is affected; the air tightness detection is a full detection item for the aluminum pipe coaxial cable, each produced cable is required to be detected, the repeatability of detection operation is high, the damage of the insulating layer can influence the accuracy of air tightness detection, the same cable is repeatedly detected for a plurality of times, and the production efficiency is influenced.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides a multistage depressurization air tightness test device capable of improving the detection accuracy.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a multistage pressure reduction gas tightness testing arrangement, includes the test box, be provided with first steady voltage valve and second steady voltage valve in the test box, air inlet on the first steady voltage valve is through first gas tube connection air supply, be connected with the second trachea between the air outlet of first steady voltage valve and the air inlet of second steady voltage valve, be connected with the third trachea on the air outlet of second steady voltage valve, be connected with the test connection on the third trachea, all be provided with governing valve on first steady voltage valve and the second steady voltage valve, be provided with first pneumatic pressure gauge on the first trachea, be provided with first pneumatic valve and second pneumatic pressure gauge on the second trachea, first pneumatic pressure gauge is close to the second steady voltage valve, the second pneumatic pressure gauge is close to first steady voltage valve, be provided with second pneumatic pressure gauge and third pneumatic pressure gauge on the third trachea, the second pneumatic pressure gauge is close to the test connection, the third pneumatic pressure gauge is close to the second steady voltage valve.
Further, the first pressure stabilizing valve is a high-pressure stabilizing valve, and the second pressure stabilizing valve is a low-pressure stabilizing valve.
Further, a third air valve is arranged at one end, far away from the first pressure stabilizing valve, of the first air pipe, and the first air pressure gauge is close to the first pressure stabilizing valve.
Further, the air source is a high-pressure air bottle, and the air pressure in the high-pressure air bottle is 5-15MPa.
Further, the high-pressure gas cylinder is filled with inert gas.
Further, one end of the third air pipe far away from the second pressure stabilizing valve is provided with a plurality of branch pipes, and the plurality of branch pipes are provided with test joints.
Compared with the prior art, the utility model has the beneficial effects that: the high-pressure gas in the high-pressure gas cylinder is decompressed to proper detection pressure through the first pressure stabilizing valve and the second pressure stabilizing valve, real-time detection is carried out through the plurality of gas pressure gauges, and gas flow is controlled through the plurality of gas valves, so that the cable is detected, an insulating layer in the cable is prevented from being damaged, the detection accuracy is improved, and the repeated detection times are reduced; meanwhile, the influence on the whole quality of the cable is avoided, and the cost is reduced.
Drawings
FIG. 1 is a schematic diagram illustrating an internal structure of a testing device according to a first embodiment of the present utility model;
fig. 2 is a schematic structural diagram of a branch pipe according to a second embodiment of the present utility model.
Reference numerals: 1. a test box; 2. a first pressure stabilizing valve; 3. a second pressure stabilizing valve; 4. a first air tube; 5. a second air pipe; 6. a third air pipe; 7. testing the joint; 8. adjusting a valve; 9. a first air pressure gauge; 10. a first air valve; 11. a second barometer; 12. a second air valve; 13. a third barometer; 14. a third air valve; 15. a branch pipe; 16. a high pressure gas cylinder; 17. and (3) a cable.
Detailed Description
In the description of the present utility model, it should be noted that, for the azimuth words such as the terms "center", "transverse (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, only for convenience of describing the present utility model and simplifying the description, but do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and should not be construed as limiting the specific protection scope of the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first", "a second" feature may explicitly or implicitly include one or more of such feature, and in the description of the present utility model, the meaning of "a number", "a number" is two or more, unless otherwise specifically defined.
The utility model is further described with reference to fig. 1 and 2.
Embodiment one:
the utility model provides a multistage pressure reduction gas tightness testing arrangement, includes test box 1, be provided with first steady voltage valve 2 and second steady voltage valve 3 in the test box 1, the air inlet on the first steady voltage valve 2 is connected the air supply through first pneumatic tube 4, be connected with second trachea 5 between the gas outlet of first steady voltage valve 2 and the air inlet of second steady voltage valve 3, be connected with third trachea 6 on the gas outlet of second steady voltage valve 3, be connected with test joint 7 on the third trachea 6, all be provided with governing valve 8 on first steady voltage valve 2 and the second steady voltage valve 3, be provided with first air pressure gauge 9 on the first pneumatic tube 4, be provided with first air valve 10 and second air pressure gauge 11 on the second trachea 5, first air valve 10 is close to second steady voltage valve 3, second air pressure gauge 11 is close to first steady voltage valve 2, be provided with second air valve 12 and third air pressure gauge 13 on the third trachea 6, second 12 is close to test joint 7, third air pressure gauge 13 is close to the second air valve 3.
As shown in fig. 1, in this embodiment, preferably, the first pressure stabilizing valve 2 is a high pressure stabilizing valve, and the second pressure stabilizing valve 3 is a low pressure stabilizing valve.
In this embodiment, preferably, a third air valve 14 is disposed at an end of the first air tube 4 away from the first pressure stabilizing valve 2, the first air pressure gauge 9 is close to the first pressure stabilizing valve 2,
as shown in FIG. 1, in this embodiment, the air source is preferably a high-pressure air bottle 16, and the air pressure in the high-pressure air bottle 16 is 5-15MPa.
In this embodiment, preferably, the high-pressure gas cylinder 16 is filled with an inert gas.
Preferably, the inert gas is nitrogen or argon.
The use principle of the testing device in this embodiment is: before testing, all air valves on the device are in a closed state, then high-pressure air is filled into a high-pressure air cylinder 16, the high-pressure air cylinder 16 is connected through a first air pipe 4, a cable 17 to be tested is connected with a third air pipe 6 through a test joint 7, a valve on the high-pressure air cylinder 16 and a third air valve 14 on the first air pipe 4 are opened, so that the high-pressure air is filled into a first pressure stabilizing valve 2, and enters a second air pipe 5 from an air outlet of the first pressure stabilizing valve 2, at the moment, a first air pressure gauge 9 on the first air pipe 4 displays the air pressure at an air inlet of the first pressure stabilizing valve 2, a second air pressure gauge 11 on the second air pipe 5 displays the air pressure at an air outlet of the first pressure stabilizing valve 2, an adjusting valve 8 on the first pressure stabilizing valve 2 is rotated, the air pressure at the air outlet of the first pressure stabilizing valve 2 is adjusted to be reduced to a proper air pressure value, then the first air valve 10 on the second air pipe 5 is opened, the air is filled into the second pressure stabilizing valve 3, the air is detected through the third air pressure gauge 13, the air pressure at the air outlet of the second pressure stabilizing valve 3 is rotated, the second air valve 3 is detected, the air pressure at the air outlet of the second air valve 3 is detected, and the air pressure at the air pressure is reduced by the second air pressure valve 3 is finally, and the air pressure is detected by the second air valve 3; after the test is completed, the second air valve 12, the first air valve 10, the third air valve 14 and the valves on the high-pressure bottles are closed in sequence.
The pressure of the high-pressure gas in the high-pressure gas cylinder 16 can be reduced to a proper detection pressure value through the pressure reduction of the first pressure stabilizing valve 2 and the second pressure stabilizing valve 3, so that the damage to an insulating layer in the cable 17 is avoided during detection, the detection accuracy is improved, and the repeated detection times are reduced; and meanwhile, the influence on the whole quality of the cable 17 is avoided, and the cost is reduced.
Preferably, the air pressure for the test cable 17 is 5PSI (about 0.034 MPa), the test duration is 15 seconds, the input air pressure of the first pressure stabilizing valve 2 is 0-254MPa, the output air pressure is 0-2.54MPa, the precision is 0.14MPa, the input air pressure of the second pressure stabilizing valve 3 is 0-2.5MPa, the output air pressure is 0-0.254MPa, and the precision is 0.014MPa.
Preferably, the number of pressure stabilizing valves can also be increased or decreased in the test tank 1 depending on the desired pressure value of the test cable 17.
Embodiment two:
as shown in fig. 2, in this embodiment, preferably, a plurality of branch pipes 15 are disposed at one end of the third air pipe 6 away from the second pressure stabilizing valve 3, and test connectors 7 are disposed on the plurality of branch pipes 15, so that detection of a plurality of cables 17 can be performed simultaneously.
Preferably, a fourth air valve may be provided on each branch pipe 15, by which the connection cable 17 is tested individually without affecting the testing of the other cables 17.
Other technical features in this embodiment are the same as those in the first embodiment.
The above description is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.
Claims (6)
1. A multistage depressurization gas tightness testing arrangement, its characterized in that: the test box comprises a test box body, be provided with first steady voltage valve and second steady voltage valve in the test box, air inlet on the first steady voltage valve passes through first pneumatic tube connection air supply, be connected with the second trachea between the gas outlet of first steady voltage valve and the air inlet of second steady voltage valve, be connected with the third trachea on the gas outlet of second steady voltage valve, be connected with test connection on the third trachea, all be provided with governing valve on first steady voltage valve and the second steady voltage valve, be provided with first air pressure gauge on the first trachea, be provided with first pneumatic valve and second air pressure gauge on the second trachea, first pneumatic valve is close to the second steady voltage valve, the second pneumatic gauge is close to first steady voltage valve, be provided with second pneumatic valve and third air pressure gauge on the third trachea, the second pneumatic valve is close to test connection, the third pneumatic gauge is close to the second steady voltage valve.
2. The multi-stage depressurization tightness test device according to claim 1, wherein: the first pressure stabilizing valve is a high-pressure stabilizing valve, and the second pressure stabilizing valve is a low-pressure stabilizing valve.
3. The multi-stage depressurization gas tightness test device according to claim 2 wherein: and a third air valve is arranged at one end, far away from the first pressure stabilizing valve, of the first air pipe, and the first air pressure gauge is close to the first pressure stabilizing valve.
4. A multistage depressurization tightness test device according to claim 3, characterized in that: the air source is a high-pressure air bottle, and the air pressure in the high-pressure air bottle is 5-15MPa.
5. The multi-stage depressurization gas tightness test device according to claim 4 wherein: the high-pressure gas cylinder is filled with inert gas.
6. The multi-stage depressurization gas tightness test device according to claim 4 wherein: one end of the third air pipe, which is far away from the second pressure stabilizing valve, is provided with a plurality of branch pipes, and the plurality of branch pipes are provided with test joints.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222650054.5U CN218994655U (en) | 2022-09-30 | 2022-09-30 | Multistage depressurization air tightness testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222650054.5U CN218994655U (en) | 2022-09-30 | 2022-09-30 | Multistage depressurization air tightness testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218994655U true CN218994655U (en) | 2023-05-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202222650054.5U Active CN218994655U (en) | 2022-09-30 | 2022-09-30 | Multistage depressurization air tightness testing device |
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| CN (1) | CN218994655U (en) |
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2022
- 2022-09-30 CN CN202222650054.5U patent/CN218994655U/en active Active
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