CN217878218U - Positive and negative pressure air tightness test system - Google Patents
Positive and negative pressure air tightness test system Download PDFInfo
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- CN217878218U CN217878218U CN202221943314.1U CN202221943314U CN217878218U CN 217878218 U CN217878218 U CN 217878218U CN 202221943314 U CN202221943314 U CN 202221943314U CN 217878218 U CN217878218 U CN 217878218U
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Abstract
The utility model discloses a positive and negative airtight test system that calms anger relates to gas tightness test system technical field. The positive and negative pressure airtight test system comprises: the device comprises a positive pressure airtight test system, a negative pressure airtight test system, a pressure detection piece and a test cavity; the positive-pressure airtight testing system comprises an air source, an electric proportional valve, a straight-through two-way electromagnetic valve I and a straight-through two-way electromagnetic valve II; the negative pressure airtight testing system comprises a vacuum pump and a straight-through two-way electromagnetic valve III; the air source is connected with an air inlet of the electric proportional valve, an air outlet of the electric proportional valve is connected with an air outlet of the through type two-way electromagnetic valve I, and an air inlet of the through type two-way electromagnetic valve I is connected with an air inlet of the through type two-way electromagnetic valve II. The utility model discloses, through the cooperation design of each structure, need not change the pipeline, can realize the positive and negative alternative test of pressing the gas tightness of seal chamber, simple and convenient through one set of positive and negative airtight test system that presses.
Description
Technical Field
The utility model relates to an air tightness test system technical field, concretely relates to positive and negative airtight test system that presses.
Background
At present, for air tightness tests of a sealed cavity under positive pressure and negative pressure conditions, single pressure air tightness tests can be generally performed only through a positive pressure air tightness test system or a negative pressure air tightness test system, and positive and negative pressure air tightness tests of the sealed cavity cannot be performed through a set of air tightness test system.
Therefore, how to solve the above technical problems is a technical problem to be solved in the technical field of the air tightness test system.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the embodiment of the utility model provides a positive and negative airtight test system presses to solve the problem that proposes in the above-mentioned background art.
The utility model provides a following technical scheme:
a positive and negative pressure gas seal test system comprising: the device comprises a positive pressure airtight test system, a negative pressure airtight test system, a pressure detection piece and a test cavity;
the positive-pressure airtight testing system comprises an air source, an electric proportional valve, a straight-through two-way electromagnetic valve I and a straight-through two-way electromagnetic valve II;
the negative pressure airtight testing system comprises a vacuum pump and a straight-through two-way electromagnetic valve III;
the air source is connected with an air inlet of an electric proportional valve, an air outlet of the electric proportional valve is connected with an air outlet of a straight-through two-way electromagnetic valve I, and an air inlet of the straight-through two-way electromagnetic valve I is connected with an air inlet of a straight-through two-way electromagnetic valve II;
the vacuum pump is connected with an air outlet of the straight-through type two-way electromagnetic valve III, and an air inlet of the straight-through type two-way electromagnetic valve III and an air outlet of the straight-through type two-way electromagnetic valve II are connected with the testing cavity through a three-way pipe;
the pressure detection piece is connected to the test cavity.
Preferably, the pressure detection piece is a pressure gauge.
Preferably, the straight-through two-way electromagnetic valve I, the straight-through two-way electromagnetic valve II, the straight-through two-way electromagnetic valve III, the electric proportional valve, the vacuum pump and the air source are all controlled by a PLC electric control system.
The embodiment of the utility model provides a pair of positive and negative airtight test system that presses has following beneficial effect: the utility model discloses, through the cooperation design of each structure, need not change the pipeline, can realize the positive and negative alternative test of pressing the gas tightness of seal chamber, simple and convenient through one set of positive and negative airtight test system that presses.
Drawings
Fig. 1 is the schematic structural diagram of the positive-negative pressure air tightness test system of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiment in the utility model, under the creative work prerequisite, all other embodiments that the skilled person obtained do not make, all belong to the scope of the utility model protection.
See fig. 1.
To the problem that above-mentioned background art mentioned, the embodiment of the utility model provides a positive and negative pressure airtight test system to solve above-mentioned technical problem, its technical scheme as follows:
a positive and negative pressure gas tightness testing system comprising: the device comprises a positive pressure airtight testing system, a negative pressure airtight testing system, a pressure detection piece 6 and a testing cavity 5;
the positive-pressure airtight testing system comprises an air source 8, an electric proportional valve 3, a straight-through two-way electromagnetic valve I1 and a straight-through two-way electromagnetic valve II 2;
the negative pressure airtight testing system comprises a vacuum pump 7 and a straight-through two-way electromagnetic valve III 4;
the air source 8 is connected with an air inlet 31 of the electric proportional valve 3, an air outlet 32 of the electric proportional valve 3 is connected with an air outlet 12 of the straight-through two-way electromagnetic valve I1, and an air inlet 11 of the straight-through two-way electromagnetic valve I1 is connected with an air inlet 21 of the straight-through two-way electromagnetic valve II 2;
the vacuum pump 7 is connected with an air outlet 42 of the straight-through two-way electromagnetic valve III 4, and an air inlet 41 of the straight-through two-way electromagnetic valve III 4 and an air outlet 12 of the straight-through two-way electromagnetic valve II 2 are connected with the testing cavity 5 through a three-way pipe;
the pressure detection piece 6 is connected to the test cavity 5.
In this embodiment, the pressure detecting member 6 is a pressure gauge.
In the embodiment, the straight-through type two-way electromagnetic valve I1, the straight-through type two-way electromagnetic valve II 2, the straight-through type two-way electromagnetic valve III 4, the electric proportional valve 3, the vacuum pump 7 and the air source 8 are all controlled by a PLC (programmable logic controller) electric control system; the pressure detection part 6 can feed back a pressure signal to the PLC electric control system.
The utility model discloses well positive negative pressure airtight test system application method as follows:
1. and (3) positive pressure test:
1.1. opening a gas source 8, and simultaneously opening a straight-through two-way electromagnetic valve I1 and a straight-through two-way electromagnetic valve II 2; setting the electric proportional valve 3 to the air pressure to be tested, and closing the straight-through two-way electromagnetic valve I1 and the straight-through two-way electromagnetic valve II 2 simultaneously when the pressure gauge detects that the testing cavity 5 reaches the set air pressure, and completely disconnecting the testing cavity 5 from the air source 8;
1.2. the positive pressure sealing performance of the testing cavity 5 is judged by detecting the pressure change of the testing cavity 5 through a pressure gauge, after the positive pressure sealing performance is judged, the electric proportional valve 3 is adjusted to be 0, and the straight-through two-way electromagnetic valve I1 and the straight-through two-way electromagnetic valve II 2 are opened simultaneously, so that the gas in the testing cavity 5 is discharged, the pressure relief is realized, and the positive pressure test is completed;
2. and (3) negative pressure testing:
2.1. opening a straight-through two-way electromagnetic valve III 4, wherein the straight-through two-way electromagnetic valve I1 and the straight-through two-way electromagnetic valve II 2 are in a closed state; starting a vacuum pump 7 for vacuumizing, and when a pressure gauge detects that the pressure of the test cavity 5 reaches the required test pressure, closing the straight-through two-way electromagnetic valve III 4 and the vacuum pump 7, wherein the test cavity 5 is completely disconnected from the external vacuum;
2.2. the pressure change of the testing cavity 5 is detected through a pressure gauge, the negative pressure sealing performance of the testing cavity 5 is judged, when the vacuum is required to be discharged in the testing process, the electric proportional valve 3 is set to be low pressure, the straight-through type two-way electromagnetic valve I1 and the straight-through type two-way electromagnetic valve II 2 are opened, and gas enters the testing cavity 5 through the electric proportional valve 3, the straight-through type two-way electromagnetic valve I1 and the straight-through type two-way electromagnetic valve II 2 to realize negative pressure relief.
It should be noted that most of the electromagnetic pneumatic valves can only realize one-way closing, and the reverse pressure can automatically open, and even if negative pressure closing can be realized, only a small pressure difference can be borne.
For the straight-through two-way electromagnetic valve, when the straight-through two-way electromagnetic valve is actually used, even if the straight-through two-way electromagnetic valve is in a closed state, if the negative pressure on one side of the air outlet of the straight-through two-way electromagnetic valve is too large, the straight-through two-way electromagnetic valve can be forced to be opened, so that a medium flows out.
The utility model discloses in, when the negative pressure test, if only one through two-way solenoid valve II 2 on the airtight test system of malleation, great when 5 negative pressure values of test cavity, through two-way solenoid valve II 2 can force to open, and external gas gets into the negative pressure leakproofness test result that test cavity 5 can influence test cavity 5.
In the embodiment, the straight-through two-way electromagnetic valve I1 which is opposite to the straight-through two-way electromagnetic valve II 2 is connected in series to the positive-pressure airtight testing system, so that when the negative-pressure tightness is tested, external gas can be prevented from entering the testing cavity 5, the testing cavity 5 is guaranteed to be completely disconnected from the external vacuum, and the testing accuracy is improved.
The embodiment of the utility model provides a pair of positive and negative airtight test system that presses has following beneficial effect: the utility model discloses, through the cooperation design of each structure, need not change the pipeline, can realize the positive and negative alternative test of pressing the gas tightness of seal chamber, simple and convenient through one set of positive and negative airtight test system that presses.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.
It should be understood that equivalents and modifications may be made thereto by those of ordinary skill in the art, and all such modifications and alterations are intended to fall within the scope of the appended claims.
Claims (3)
1. A positive and negative pressure gas seal test system is characterized by comprising: the device comprises a positive pressure airtight test system, a negative pressure airtight test system, a pressure detection piece and a test cavity;
the positive-pressure airtight testing system comprises an air source, an electric proportional valve, a straight-through two-way electromagnetic valve I and a straight-through two-way electromagnetic valve II;
the negative pressure airtight testing system comprises a vacuum pump and a straight-through two-way electromagnetic valve III;
the air source is connected with an air inlet of an electric proportional valve, an air outlet of the electric proportional valve is connected with an air outlet of a straight-through two-way electromagnetic valve I, and an air inlet of the straight-through two-way electromagnetic valve I is connected with an air inlet of a straight-through two-way electromagnetic valve II;
the vacuum pump is connected with the air outlet of the straight-through two-way electromagnetic valve III, and the air inlet of the straight-through two-way electromagnetic valve III and the air outlet of the straight-through two-way electromagnetic valve II are connected with the test cavity through a three-way pipe;
the pressure detection piece is connected to the test cavity.
2. The positive and negative pressure vapor compression test system as recited in claim 1, wherein the pressure detection member is a pressure gauge.
3. The positive and negative pressure gas tightness test system according to claim 1, wherein the straight-through two-way electromagnetic valve I, the straight-through two-way electromagnetic valve II, the straight-through two-way electromagnetic valve III, the electric proportional valve, the vacuum pump and the gas source are all controlled by a PLC (programmable logic controller) electric control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221943314.1U CN217878218U (en) | 2022-07-27 | 2022-07-27 | Positive and negative pressure air tightness test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221943314.1U CN217878218U (en) | 2022-07-27 | 2022-07-27 | Positive and negative pressure air tightness test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217878218U true CN217878218U (en) | 2022-11-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221943314.1U Active CN217878218U (en) | 2022-07-27 | 2022-07-27 | Positive and negative pressure air tightness test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217878218U (en) |
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2022
- 2022-07-27 CN CN202221943314.1U patent/CN217878218U/en active Active
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