CN212300839U - Positive and negative pressure test system of pressure cover - Google Patents
Positive and negative pressure test system of pressure cover Download PDFInfo
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- CN212300839U CN212300839U CN202021531629.6U CN202021531629U CN212300839U CN 212300839 U CN212300839 U CN 212300839U CN 202021531629 U CN202021531629 U CN 202021531629U CN 212300839 U CN212300839 U CN 212300839U
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- 238000012360 testing method Methods 0.000 title claims abstract description 57
- 238000004088 simulation Methods 0.000 claims abstract description 44
- 238000002955 isolation Methods 0.000 claims abstract description 24
- 238000007789 sealing Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 description 5
- 238000010998 test method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
The utility model discloses a positive and negative pressure test system of a pressure cover, which comprises a positive pressure air source, a positive pressure controller, a pressure selection valve, an isolation valve, a positive pressure sensor, a vacuum generator, a negative pressure controller, a negative pressure sensor and a simulation box; the simulation box is provided with a cover opening matched with the pressure cover of the expansion box; the positive pressure air source, the positive pressure controller, the pressure selection valve, the isolation valve and the simulation box are sequentially communicated through a pipeline; the suction inlet of the vacuum generator, the negative pressure controller and the pressure selection valve are communicated in sequence through pipelines; the positive pressure sensor is communicated with the isolation valve and the simulation box through pipelines between the positive pressure test tube and the simulation box, and the negative pressure sensor is communicated with the isolation valve and the simulation box through pipelines between the negative pressure test tube and the simulation box. The utility model discloses a positive negative pressure test system of pressure lid, its positive negative pressure that can measure expansion tank pressure lid opens the pressure value.
Description
Technical Field
The utility model relates to an auto-parts detects technical field, especially relates to a positive negative pressure test system of pressure lid.
Background
The pressure cover of the expansion tank needs to be tested for the opening pressure of the relief valve after the preliminary assembly is completed, so that the pressure cover of the expansion tank which leaves the factory meets the requirement. When the pressure of the expansion tank pressure cover in the expansion tank is higher than a certain high air pressure value, a release valve of the expansion tank pressure cover needs to be opened so that the expansion tank can be outwardly decompressed; when the pressure in the expansion tank is less than a certain low pressure value, the release valve of the pressure cover of the expansion tank should be opened so that the expansion tank can suck the outside air. The existing pressure cover opening pressure testing method usually adopts a plurality of manual operation procedures, positive pressure and negative pressure are respectively added, human body perception relief valve air flow is used for judging the quality, the error is large, the testing value cannot be quantized, and the productivity is low.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide a positive negative pressure test system of pressure lid, its positive negative opening pressure value that can measure expansion tank pressure lid.
The purpose of the utility model is realized by adopting the following technical scheme:
a pressure cap positive and negative pressure test system comprising: the device comprises a positive pressure air source, a positive pressure controller, a pressure selection valve, an isolation valve, a positive pressure sensor, a vacuum generator, a negative pressure controller, a negative pressure sensor and a simulation box; the simulation box is provided with a cover opening matched with the pressure cover of the expansion box; the positive pressure air source, the positive pressure controller, the pressure selection valve, the isolation valve and the simulation box are sequentially communicated through a pipeline; the suction inlet of the vacuum generator, the negative pressure controller and the pressure selection valve are communicated in sequence through pipelines; the positive pressure sensor pass through the positive pressure test pipe with pipeline intercommunication between isolation valve and the simulation case, negative pressure sensor pass through the negative pressure test pipe with pipeline intercommunication between isolation valve and the simulation case.
Further, the positive and negative pressure testing system of the pressure cover further comprises a negative pressure source switch valve; and the positive pressure air source, the negative pressure source switch valve and the air inlet end of the vacuum generator are communicated in sequence through pipelines.
Furthermore, a positive pressure test selection valve is arranged on the positive pressure test pipe.
Furthermore, a negative pressure test selection valve is arranged on the negative pressure test pipe.
Furthermore, a sealing cover is arranged on the simulation box and is suitable for covering the cover opening, and a rear end pressure sensor is arranged in the sealing cover.
Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model discloses a positive negative pressure test system of pressure lid through the tube coupling between simulation case, positive pressurized air source, vacuum generator, malleation pressure controller, negative pressure controller, negative pressure sensor and the malleation pressure sensor, the positive negative opening pressure of test out expansion tank pressure lid that can be accurate to can make things convenient for people to select unqualified expansion tank pressure lid, guarantee the qualification rate that expansion tank pressure lid dispatched from the factory.
Drawings
Fig. 1 is a schematic diagram of the positive and negative pressure testing system of the pressure cover of the present invention.
FIG. 2 is a graph showing the relationship between pressure and time according to the positive pressure test method of the present invention;
FIG. 3 is another graph of the pressure versus time relationship of the positive pressure test method of the present invention;
FIG. 4 is a graph showing the relationship between pressure and time according to the negative pressure testing method of the present invention;
fig. 5 is another graph of the relationship between pressure and time according to the negative pressure testing method of the present invention.
In the figure: 1. a simulation box; 11. covering the opening; 2. a positive pressure gas source; 211. an isolation valve; 212. a positive pressure controller; 3. a vacuum generator; 311. a negative pressure controller; 321. a negative pressure source switch valve; 4. a positive pressure sensor; 5. a negative pressure sensor; 6. a positive pressure test tube; 61. a positive pressure test selection valve; 7. a negative pressure test tube; 71. a negative pressure test selection valve; 8. a pressure selection valve; 9. a sealing cover; 91. a rear end pressure sensor.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, the embodiment of the present invention provides a positive/negative pressure testing system for a pressure cover, which at least includes: a positive pressure air source 2, a positive pressure controller 212, a pressure selection valve 8, an isolation valve 211, a positive pressure sensor 4, a vacuum generator 3, a negative pressure controller 311, a negative pressure sensor 5 and a simulation box 1; the simulation box 1 is provided with a cover opening 11 matched with the pressure cover of the expansion box; the positive pressure gas source 2, the positive pressure controller 212, the pressure selection valve 8, the isolation valve 211 and the simulation box 1 are sequentially communicated through a pipeline; the suction inlet of the vacuum generator 3, the negative pressure controller 311 and the pressure selection valve 8 are communicated in sequence through pipelines; positive pressure sensor 4 through positive pressure test tube 6 with pipeline intercommunication between isolation valve 211 and the simulation case 1, negative pressure sensor 5 through negative pressure test tube 7 with pipeline intercommunication between isolation valve 211 and the simulation case 1. The isolation valve 211 plays a role of on-off, the positive pressure controller 212 and the negative pressure controller 311 are used for controlling the ventilation rate, and the pressure selection valve 8 plays a role of reversing.
Preferably, the pressure cover positive and negative pressure test system further comprises a negative pressure source switch valve 321; the positive pressure air source 2, the negative pressure switch valve 321 and the air inlet end of the vacuum generator 3 are communicated in sequence through pipelines. That is, the utility model discloses in, can drive vacuum generator 3 through same positive pressurized air source 2 for this system is more succinct, has also saved the cost. In addition, it should be noted that, when positive pressure is required in the simulation box 1, the pressure selection valve 8 should be in a working state at this time that only the positive pressure air source 2 is switched on, the vacuum generator 3 is blocked, and the negative pressure source switch valve 321 is closed at this time; when negative pressure is required in the simulation tank 1, the pressure selection valve 8 should be operated in such a state that only the vacuum generator 3 is turned on and the negative pressure source switching valve 321 is opened.
Preferably, the positive pressure test pipe 6 is provided with a positive pressure test selection valve 61; the positive pressure test selection valve 61 is used to open and close the positive pressure test tube 6. A negative pressure test selection valve 71 is arranged on the negative pressure test tube 7; the negative pressure test selection valve 71 is used for switching the negative pressure test tube 7 on and off. By the arrangement mode, when the simulation box 1 needs to be pressurized, only the positive pressure test selection valve 61 can be opened, and the negative pressure test selection valve 71 can be closed, so that damage to the negative pressure sensor is avoided. Similarly, when the simulation box 1 needs to be evacuated, only the negative pressure test selection valve 71 can be opened, and the positive pressure test selection valve 61 can be closed, so that the positive pressure sensor is prevented from being damaged.
Preferably, a sealing cover 9 is arranged on the simulation box 1, the sealing cover 9 is suitable for covering the cover opening 11, and a rear end pressure sensor 91 is arranged in the sealing cover 9. Specifically, the sealing cover 9 can move up and down through the air cylinder, so as to open or cover the cover opening 11.
Through foretell setting mode, can make things convenient for tester's accuracy carry out the test of positive negative opening pressure to expansion tank pressure lid. The following are used specifically:
when the positive opening pressure of the pressure cover of the expansion tank needs to be accurately tested, the pressure cover of the expansion tank needs to be screwed on the cover opening 11 of the simulation tank 1, then the positive pressure air source 2 and the positive pressure controller 212 are started (at this time, the vacuum generator 3, the negative pressure source switch valve 321 and the negative pressure controller 311 are all in a closed state, the pressure selection valve 8 is selected to be communicated with the positive pressure air source 2, the isolation valve 211 is opened), the simulation box 1 is pressurized by the positive pressure air source 2 and is pressurized until the pressure is higher than the positive opening pressure of the pressure cover of the expansion box, then the isolation valve 211 is closed, at this time, the high pressure in the simulation tank 1 can be released only through the pressure cover of the expansion tank, and the pressure in the expansion tank pressure cover can be detected by the positive pressure sensor 4, and the tester can calculate the positive opening pressure of the expansion tank cover according to the pressure change value detected by the positive pressure sensor 4, which is specifically as follows: and when the pressure loss in 30s is less than or equal to 1KPa, marking the pressure in the last second in the 30s as the positive opening pressure of the pressure cover of the expansion tank.
When the negative opening pressure of the expansion tank pressure cover needs to be accurately tested, the expansion tank pressure cover needs to be screwed on the cover opening 11 of the simulation tank 1, then the positive pressure air source 2, the negative pressure source switch valve 321, the vacuum generator 3 and the negative pressure controller 311 need to be opened (at this time, the positive pressure controller 212 is in a closed state, the pressure selection valve 8 is selectively communicated with the vacuum generator 3, and the isolation valve 211 is opened), air is sucked into the simulation tank 1 through the vacuum generator 3 until the air is sucked below the negative opening pressure of the expansion tank pressure cover, then the isolation valve 211 is closed, at this time, the pressure in the simulation tank 1 can only be balanced with the outside through the expansion tank pressure cover, the pressure in the expansion tank pressure cover can be detected by the negative pressure sensor 5, a tester can calculate the positive opening pressure of the expansion tank cover according to the pressure change detected by the negative pressure sensor 5, the method comprises the following specific steps: and when the pressure loss in 30s is less than or equal to 1KPa, marking the pressure in the last second in 30s as the negative opening pressure of the pressure cover of the expansion tank.
Through foretell mode of setting up, can also make things convenient for the tester quick carry out the test of positive negative opening pressure to expansion tank pressure lid, in the time of can be fine being applicable to batch test. The following are used specifically:
when the positive opening pressure of the pressure cover of the expansion tank needs to be tested quickly, the pressure cover of the expansion tank needs to be screwed on the cover opening 11 of the simulation tank 1, the sealing cover 9 covers the cover opening 11, then the positive pressure air source 2 and the positive pressure controller 212 are started (at this time, the vacuum generator 3, the negative pressure source switch valve 321 and the negative pressure controller 311 are all in a closed state, the pressure selection valve 8 is selected to be communicated with the positive pressure air source 2, and the isolation valve 211 is opened), and the positive pressure air source 2 is enabled to pressurize the interior of the simulation tank 1 to be below the positive opening pressure of the pressure cover of the expansion tank at a first rate (namely, the positive opening pressure of the pressure cover of the expansion tank is not reached yet) by adjusting the positive pressure controller 212. Then, by adjusting the positive pressure controller 212, the positive pressure source 2 continues to pressurize the simulation tank 1 at the second rate, and the first rate is greater than the second rate during the pressurizing process, which saves time. When the rear end pressure sensor 91 detects that the pressure in the seal box reaches a preset value, the value of the positive pressure sensor 4 at the same time is captured and marked as the positive opening pressure of the pressure cover of the expansion box. It should be noted that the pressure in the sealed tank reaches a preset value, which indicates that the pressure cover of the expansion tank leaks, i.e. the pressure in the simulation tank 1 reaches its opening pressure.
When the negative opening pressure of the expansion tank pressure cover needs to be tested quickly, the expansion tank pressure cover needs to be screwed on the cover opening 11 of the simulation tank 1, the sealing cover 9 covers the cover opening 11, then the positive pressure air source 2, the negative pressure source switch valve 321, the vacuum generator 3 and the negative pressure controller 311 are opened (at this time, the positive pressure controller 212 is in a closed state, the pressure selection valve 8 is selected to be communicated with the vacuum generator 3, and the isolation valve 211 is opened), and the vacuum generator 3 pressurizes the inside of the simulation tank 1 to be higher than the negative opening pressure of the expansion tank pressure cover at a first rate (namely, the negative opening pressure of the expansion tank pressure cover is not reached yet) by adjusting the negative pressure controller 311. Then, the vacuum generator 3 continues to pump air into the simulation tank 1 at the second rate by adjusting the negative pressure controller 311, and the first rate is greater than the second rate during the pumping process. When the rear end pressure sensor 91 detects that the pressure in the seal box reaches a preset value, the value of the negative pressure sensor 5 at the same time is captured and marked as the negative opening pressure of the pressure cover of the expansion box. It should be noted that the pressure in the sealed tank reaches the preset value, which indicates that the pressure cover of the expansion tank is opened, i.e. the pressure in the simulation tank 1 reaches the opening pressure.
The above is only the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and all the same principles are included in the protection scope of the present invention.
Claims (5)
1. A positive and negative pressure test system for a pressure cap, comprising: the device comprises a positive pressure air source, a positive pressure controller, a pressure selection valve, an isolation valve, a positive pressure sensor, a vacuum generator, a negative pressure controller, a negative pressure sensor and a simulation box; the simulation box is provided with a cover opening matched with the pressure cover of the expansion box; the positive pressure air source, the positive pressure controller, the pressure selection valve, the isolation valve and the simulation box are sequentially communicated through a pipeline; the suction inlet of the vacuum generator, the negative pressure controller and the pressure selection valve are communicated in sequence through pipelines; the positive pressure sensor pass through the positive pressure test pipe with pipeline intercommunication between isolation valve and the simulation case, negative pressure sensor pass through the negative pressure test pipe with pipeline intercommunication between isolation valve and the simulation case.
2. The pressure cap positive and negative pressure test system of claim 1, further comprising a negative pressure source switch valve; and the positive pressure air source, the negative pressure source switch valve and the air inlet end of the vacuum generator are communicated in sequence through pipelines.
3. The positive and negative pressure test system for pressure caps of claim 1, wherein the positive pressure test tube is provided with a positive pressure test selection valve.
4. The pressure cap positive and negative pressure test system of claim 1, wherein the negative pressure test tube is provided with a negative pressure test selection valve.
5. The positive and negative pressure test system for pressure caps of claim 1, wherein the dummy box is provided with a sealing cover adapted to cover the cap opening, and a rear pressure sensor is provided in the sealing cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021531629.6U CN212300839U (en) | 2020-07-29 | 2020-07-29 | Positive and negative pressure test system of pressure cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021531629.6U CN212300839U (en) | 2020-07-29 | 2020-07-29 | Positive and negative pressure test system of pressure cover |
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| Publication Number | Publication Date |
|---|---|
| CN212300839U true CN212300839U (en) | 2021-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021531629.6U Active CN212300839U (en) | 2020-07-29 | 2020-07-29 | Positive and negative pressure test system of pressure cover |
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| CN (1) | CN212300839U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111982497A (en) * | 2020-07-29 | 2020-11-24 | 广州阿普顿自动化系统有限公司 | Positive and negative pressure test system and test method for pressure cover |
| CN113607345A (en) * | 2021-08-30 | 2021-11-05 | 中国人民解放军海军特色医学中心 | Container sealing performance tester |
-
2020
- 2020-07-29 CN CN202021531629.6U patent/CN212300839U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111982497A (en) * | 2020-07-29 | 2020-11-24 | 广州阿普顿自动化系统有限公司 | Positive and negative pressure test system and test method for pressure cover |
| CN113607345A (en) * | 2021-08-30 | 2021-11-05 | 中国人民解放军海军特色医学中心 | Container sealing performance tester |
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