CN112033662A - Diaphragm capsule life test system - Google Patents
Diaphragm capsule life test system Download PDFInfo
- Publication number
- CN112033662A CN112033662A CN202010994463.XA CN202010994463A CN112033662A CN 112033662 A CN112033662 A CN 112033662A CN 202010994463 A CN202010994463 A CN 202010994463A CN 112033662 A CN112033662 A CN 112033662A
- Authority
- CN
- China
- Prior art keywords
- valve
- pressure
- vacuum
- pneumatic
- test system
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Abstract
The invention discloses a diaphragm capsule service life testing system which comprises a high-temperature oven, wherein the high-temperature oven is connected with a first switching valve, the first switching valve is respectively connected with a second switching valve and a positive pressure generating unit, the second switching valve is connected with a vacuum generating unit, the positive pressure generating unit comprises a high-pressure air source, the high-pressure air source is sequentially connected with a pressure reducing valve, a first electric-gas proportional valve and a first electromagnetic valve, and the first electromagnetic valve is connected with the first switching valve. The invention integrates a full-automatic electric control system by utilizing an electro-pneumatic proportional valve, a pneumatic valve, an electromagnetic valve, a pressure transmitter and the like, and has controllable boosting speed and adjustable boosting range. Aiming at the fatigue test of the vacuum bellows, the invention is provided with the large-volume buffer container for carrying out the pressure equalization of positive pressure and negative pressure of the pipeline, thereby effectively reducing the time for vacuumizing. Meanwhile, the positive pressure in the pipeline can be equalized, so that the dependence on the high-performance vacuum pump is reduced.
Description
Technical Field
The invention relates to the field of aerospace, in particular to a diaphragm capsule service life testing system.
Background
With the continuous progress and development of industrial modernization, people tend to use a testing device with high efficiency, high precision and stable performance.
The diaphragm capsule life test device that has at present is manual pressure regulating control and steps up and evacuation to the diaphragm capsule product to satisfy the required pressure cycle loading of product, so then can have following problem: (1) the pressure value is adjusted manually, the error of the final adjusted pressure value is large, the pressure boosting and vacuum pumping ranges are in small ranges for the capsule product, and the required precision is high, so the manual control adjustment is not preferable; (2) the operation portability is not high. If the pressure values of boosting and vacuumizing different bellows products are required to be changed, the adjustment needs to be carried out on the system site, and more time, labor and material resources are needed; (3) there is no regulation periodicity. The automatic control execution of the system pressure boosting, pressure maintaining and pressure relief in a specific time can not be realized. (4) The working condition that whole device can satisfy is more single. The product cannot be subjected to positive and negative pressure tests simultaneously; (5) aiming at the fatigue test of the vacuum diaphragm capsule, the vacuumizing time is long, and the high-efficiency test cannot be carried out.
An effective solution to the problems in the related art has not been proposed yet.
Disclosure of Invention
In view of the above technical problems in the related art, the present invention provides a system for testing the life of a capsule, which can solve the above problems.
In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:
the utility model provides a diaphragm capsule life test system, includes the high temperature oven, first diverter valve is connected to the high temperature oven, second diverter valve and malleation generation unit are connected respectively to first diverter valve, the vacuum generation unit is connected to the second diverter valve.
Furthermore, the positive pressure generating unit comprises a high-pressure air source, the high-pressure air source is sequentially connected with a pressure reducing valve, a first electric-gas proportional valve and a first electromagnetic valve, and the first electromagnetic valve is connected with the first switching valve.
Furthermore, a filter is arranged between the high-pressure air source and the pressure reducing valve, and a first pressure gauge is arranged between the filter and the pressure reducing valve.
Furthermore, a second electric-gas proportional valve is connected in parallel with two ends of the first electric-gas proportional valve.
Further, a second pressure gauge is arranged between the pressure reducing valve and the first electro-pneumatic proportional valve.
Furthermore, the first electromagnetic valve is connected with a third pressure gauge, a pressure relief electromagnetic valve and a pressure sensor.
Further, the vacuum generating unit comprises a vacuum pump, the vacuum pump is sequentially connected with a first buffer container, a first pneumatic vacuum ball valve, a second buffer container and a vacuum solenoid valve, the first buffer container is sequentially connected with a second pneumatic vacuum ball valve and a test container, the test container is connected with a third pneumatic vacuum ball valve and a fourth pneumatic vacuum ball valve, the third pneumatic vacuum ball valve is connected with the second buffer container, and the fourth pneumatic vacuum ball valve is connected with the second switching valve.
Furthermore, a second pressure sensor and a temperature transmitter are arranged on the test container.
Further, the test container is connected with a film gauge.
Further, the number of the vacuum pumps is two.
The invention has the beneficial effects that:
1. the invention integrates a full-automatic electric control system by utilizing an electro-pneumatic proportional valve, a pneumatic valve, an electromagnetic valve, a pressure transmitter and the like, and has controllable boosting speed and adjustable boosting range.
2. The boosting device has two pressure ranges of 0-0.5MPa and 0.5-1MPa respectively, and is used for meeting the pressure requirements of different diaphragm capsule products.
3. The invention can realize stepless regulation of pressure and speed, avoids the impact phenomenon when the normally open switch type air valve is reversed, and compared with intermittent control, the system is simplified and the elements are greatly reduced.
4. The invention can simultaneously carry out positive and negative pressure tests on the diaphragm capsule product, and the test container is provided with two seals in different forms, so that the diaphragm capsule product has the positive and negative pressure sealing functions. Meanwhile, the test container is provided with cooling water, so that the test container has a high-temperature resistance function.
5. Aiming at the fatigue test of the vacuum bellows, the invention is provided with the large-volume buffer container for carrying out the pressure equalization of positive pressure and negative pressure of the pipeline, thereby effectively reducing the time for vacuumizing. Meanwhile, the positive pressure in the pipeline can be equalized, so that the dependence on the high-performance vacuum pump is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a capsule life test system.
In the figure: 1. the high-temperature testing device comprises a high-temperature oven, 2, a first switching valve, 3, a second switching valve, 4, a high-pressure air source, 5, a pressure reducing valve, 6, a first electric-gas proportional valve, 7, a first electromagnetic valve, 8, a filter, 9, a first pressure gauge, 10, a second electric-gas proportional valve, 11, a second pressure gauge, 12, a third pressure gauge, 13, a pressure relief electromagnetic valve, 14, a first pressure sensor, 15, a vacuum pump, 16, a first buffer container, 17, a first pneumatic vacuum ball valve, 18, a second buffer container, 19, a vacuum electromagnetic valve, 20, a second pneumatic vacuum ball valve, 21, a testing container, 22, a third pneumatic vacuum ball valve, 23, a fourth pneumatic vacuum ball valve, 24, a second pressure sensor, 25, a temperature transmitter and 26, and a diaphragm gauge.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
As shown in fig. 1, the system for testing the service life of a membrane cartridge according to the embodiment of the present invention includes a high temperature oven 1, the high temperature oven 1 is connected to a first switching valve 2, the first switching valve 2 is respectively connected to a second switching valve 3 and a positive pressure generating unit, and the second switching valve 3 is connected to a vacuum generating unit.
In a specific embodiment of the present invention, the positive pressure generating unit includes a high-pressure air source 4, the high-pressure air source 4 is sequentially connected to a pressure reducing valve 5, a first electro-pneumatic proportional valve 6 and a first electromagnetic valve 7, and the first electromagnetic valve 7 is connected to the first switching valve 2.
In a specific embodiment of the present invention, a filter 8 is disposed between the high pressure gas source 4 and the pressure reducing valve 5, and a first pressure gauge 9 is disposed between the filter 8 and the pressure reducing valve 5.
In a particular embodiment of the invention, a second electro-pneumatic proportional valve 10 is connected in parallel at both ends of the first electro-pneumatic proportional valve 6.
In a particular embodiment of the invention, a second pressure gauge 11 is arranged between said pressure reducing valve 5 and said first electro-pneumatic proportional valve 6.
In an embodiment of the invention, the first solenoid valve 7 is connected to a third pressure gauge 12, a pressure relief solenoid valve 13 and a pressure sensor 14.
In a specific embodiment of the present invention, the vacuum generating unit includes a vacuum pump 15, the vacuum pump 15 is sequentially connected to a first buffer container 16, a first pneumatic vacuum ball valve 17, a second buffer container 18 and a vacuum solenoid valve 19, the first buffer container 16 is sequentially connected to a second pneumatic vacuum ball valve 20 and a test container 21, the test container 21 is connected to a third pneumatic vacuum ball valve 22 and a fourth pneumatic vacuum ball valve 23, the third pneumatic vacuum ball valve 22 is connected to the second buffer container 18, and the fourth pneumatic vacuum ball valve 23 is connected to the second switching valve 3.
In one embodiment of the invention, a second pressure sensor 24 and a temperature transmitter 25 are provided on the test vessel 21.
In one embodiment of the invention, the test container 21 is connected to a film gauge 26.
In one embodiment of the invention, the number of vacuum pumps 15 is two.
In order to facilitate understanding of the above-described technical aspects of the present invention, the above-described technical aspects of the present invention will be described in detail below in terms of specific usage.
In particular use, according to the diaphragm capsule life test system of the invention,
the device of the invention is divided into three parts: one part is a positive pressure generating unit, high-pressure gas is input into an inlet, then the high-pressure gas is decompressed to a proper pressure range, and then the high-pressure gas is accurately controlled and output through an electric proportional valve; the second part is a vacuum generating unit, and the capsule product is vacuumized by two high-performance vacuum pumps, a pressure instrument, a pneumatic valve and the like; and the third part is a high-temperature generating unit which provides the required high-temperature environment for the capsule product through a high-temperature oven.
The positive pressure generating unit needs to be connected with a filter 8 to protect various valves and products behind the high-pressure gas from being influenced by impurities. And a first pressure gauge 9 is provided for detecting whether the input gas is within a normal pressure range. And a pressure reducing valve 5 is arranged behind the filter and used for reducing the pressure of an input high-pressure gas source so as to obtain gas capable of meeting the working pressure of the rear first electro-pneumatic proportional valve 6, the rear second electro-pneumatic proportional valve 10 and the electromagnetic valve. And a second pressure gauge 11 is provided for detecting whether the gas after pressure reduction is within a reasonable range. The electro-pneumatic proportional valves 6 and 10 are arranged behind the pressure reducing valve, the two valves are installed in parallel to form two-gear pressure adjustment, wherein the precision of one gear is 0.5%, the precision of the other gear is 1%, and the diaphragm capsule is suitable for the requirements of different diaphragm capsule products. The first electromagnetic valve 7 is arranged behind the electric-gas proportional valve and used for controlling the output of a positive pressure gas source and maintaining pressure. Meanwhile, a third pressure gauge 14 and a first pressure sensor 9 are configured, the third pressure gauge 14 is used for detecting the pressure value of the output gas, and the first pressure sensor 9 is used for cooperating with the first electro-pneumatic proportional valve 6 or the second electro-pneumatic proportional valve 10 so as to achieve the specific output pressure. And a pressure relief electromagnetic valve 12 is connected behind the first electromagnetic valve 7 and used for automatically controlling pressure relief of the system.
The vacuum generating unit is matched with a vacuum electromagnetic baffle valve and a pneumatic vacuum ball valve through two high-performance vacuum pumps 15, so that the vacuum pumping operation of the bellows product is realized. Meanwhile, the vacuum generating unit is provided with a test container 21, a first buffer container 16 and a second buffer container 18. The test container 21 is required to have the functions of bearing positive pressure and negative pressure, so the container is designed to be sealed twice, wherein the positive pressure is sealed inside, the polytetrafluoroethylene material is adopted, the positive extrusion pressure can be borne, and the high temperature resistance is realized; the negative pressure is sealed outside, a perfluoro rubber ring is used for sealing, and cooling water is introduced to the outer side of the sealing ring, so that the sealing function of the test container at high temperature is met. The second buffer container 18 plays a role in pressure equalization, the second buffer container 18 can be continuously vacuumized in the vacuum fatigue test process, when the vacuum fatigue test process is needed, the third pneumatic vacuum ball valve 22 is opened, the pressure close to the normal pressure in the pipeline and the second buffer container 18 are equalized, the pipeline can reach a certain vacuum degree quickly, and then the target vacuum value can be reached in a short time. The first buffer container 16 also plays a role of pressure equalization, and due to the fact that the positive pressure of the air suction opening cannot be too high due to a plurality of high-performance vacuum pumps, but the positive pressure in the pipeline cannot be quickly reduced to a required value when the positive pressure in the pipeline is normally released, so that the pipeline and the buffer container 21 can be communicated with each other to equalize the pressure before vacuum pumping, the pipeline pressure is quickly reduced to the required value, and the air suction requirement of the vacuum pumps is further met. In addition, the driving air part of the pneumatic vacuum flapper valve is provided by a filtering pressure regulating valve and a solenoid valve group in the positive pressure generating unit. The filtering and pressure regulating valve is used for filtering impurities from a compressed air source and regulating output stable pressure. And the electromagnetic valve group is used for realizing the control on-off of the driving air source.
And the high-temperature generation unit provides a high-temperature oven 13 for heating the diaphragm capsule product, so that the test requirement of a high-temperature environment is met.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a diaphragm capsule life test system, includes high temperature oven (1), its characterized in that, first diverter valve (2) are connected in high temperature oven (1), second diverter valve (3) and malleation generating unit are connected respectively in first diverter valve (2), vacuum generating unit is connected in second diverter valve (3).
2. The bellows life test system of claim 1, characterized in that the positive pressure generating unit comprises a high-pressure air source (4), the high-pressure air source (4) is connected with a pressure reducing valve (5), a first electro-pneumatic proportional valve (6) and a first solenoid valve (7) in sequence, and the first solenoid valve (7) is connected with the first switching valve (2).
3. The bellows life test system according to claim 2, wherein a filter (8) is arranged between the high pressure gas source (4) and the pressure reducing valve (5), and a first pressure gauge (9) is arranged between the filter (8) and the pressure reducing valve (5).
4. The bellows life test system according to claim 3, characterized in that a second electro-pneumatic proportional valve (10) is connected in parallel at both ends of the first electro-pneumatic proportional valve (6).
5. The bellows life test system according to claim 4, characterized in that a second pressure gauge (11) is provided between the pressure reducing valve (5) and the first electro-pneumatic proportional valve (6).
6. The bellows life test system according to claim 5, wherein the first solenoid valve (7) is connected to a third pressure gauge (12), a pressure relief solenoid valve (13) and a first pressure sensor (14).
7. The bellows life test system according to claim 1, characterized in that the vacuum generating unit comprises a vacuum pump (15), the vacuum pump (15) is connected with a first buffer container (16), a first pneumatic vacuum ball valve (17), a second buffer container (18) and a vacuum solenoid valve (19) in sequence, the first buffer container (16) is connected with a second pneumatic vacuum ball valve (20) and a test container (21) in sequence, the test container (21) is connected with a third pneumatic vacuum ball valve (22) and a fourth pneumatic vacuum ball valve (23), the third pneumatic vacuum ball valve (22) is connected with the second buffer container (18), and the fourth pneumatic vacuum ball valve (23) is connected with the second switching valve (3).
8. The capsule life test system according to claim 7, characterized in that a second pressure sensor (24) and a temperature transmitter (25) are provided on the test vessel (21).
9. The capsule life test system of claim 8, characterized in that the test vessel (21) is connected to a membrane gauge (26).
10. The capsule life test system according to claim 9, characterized in that the number of vacuum pumps (15) is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010994463.XA CN112033662A (en) | 2020-09-21 | 2020-09-21 | Diaphragm capsule life test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010994463.XA CN112033662A (en) | 2020-09-21 | 2020-09-21 | Diaphragm capsule life test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112033662A true CN112033662A (en) | 2020-12-04 |
Family
ID=73575480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010994463.XA Pending CN112033662A (en) | 2020-09-21 | 2020-09-21 | Diaphragm capsule life test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112033662A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114939445A (en) * | 2022-03-29 | 2022-08-26 | 合肥通用机械研究院有限公司 | Large vacuum degree change test device and test method using same |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102012302A (en) * | 2010-11-24 | 2011-04-13 | 山东万事达专用汽车制造有限公司 | Comprehensive air pressure test bed for vehicle-mounted steel tank |
| CN201900731U (en) * | 2010-11-01 | 2011-07-20 | 台光电子材料(昆山)有限公司 | Central vacuum supply system for hot press machine |
| CN202174665U (en) * | 2011-07-25 | 2012-03-28 | 浙江精业生化有限公司 | Vacuum system for preparing liquid silicon rubber |
| CN103197702A (en) * | 2012-01-04 | 2013-07-10 | 京元电子股份有限公司 | test pressure control system and method |
| CN113068446B (en) * | 2010-07-30 | 2013-09-04 | 北京宇航系统工程研究所 | Fatigue life testing device for composite diaphragm capsule under combination of multiple internal pressures and external pressures |
| CN203772054U (en) * | 2014-04-11 | 2014-08-13 | 张曙光 | Vacuum-pumping system for multistage steam jet of double-backpressure condenser |
| CN104015714A (en) * | 2014-05-09 | 2014-09-03 | 安徽霍山县东湖汽车贸易有限公司 | Clearance electromobile vacuum generating device |
| CN104990427A (en) * | 2015-07-30 | 2015-10-21 | 大唐桂冠合山发电有限公司 | System improving vacuum-pumping efficiency of double-backpressure condenser |
| CN105021389A (en) * | 2015-07-14 | 2015-11-04 | 浙江大学 | Multifunctional component gas fatigue test system |
| CN207317448U (en) * | 2017-09-19 | 2018-05-04 | 常州市震华干燥设备有限公司 | microwave rotary vacuum drier |
| CN109085793A (en) * | 2018-08-24 | 2018-12-25 | 苏州澳佰特自动化设备有限公司 | A kind of PLC control system of helium leak check filling recyclable device |
| CN209673343U (en) * | 2019-03-19 | 2019-11-22 | 六安一六八航空航天精密器件有限公司 | A kind of bellows low pressure life test apparatus |
| CN111302596A (en) * | 2020-03-04 | 2020-06-19 | 南京正诺环保科技有限公司 | Oil sludge drying treatment system and process |
| CN211292297U (en) * | 2019-11-28 | 2020-08-18 | 深圳市万斯得自动化设备有限公司 | Positive and negative pressure comprehensive test system |
-
2020
- 2020-09-21 CN CN202010994463.XA patent/CN112033662A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113068446B (en) * | 2010-07-30 | 2013-09-04 | 北京宇航系统工程研究所 | Fatigue life testing device for composite diaphragm capsule under combination of multiple internal pressures and external pressures |
| CN201900731U (en) * | 2010-11-01 | 2011-07-20 | 台光电子材料(昆山)有限公司 | Central vacuum supply system for hot press machine |
| CN102012302A (en) * | 2010-11-24 | 2011-04-13 | 山东万事达专用汽车制造有限公司 | Comprehensive air pressure test bed for vehicle-mounted steel tank |
| CN202174665U (en) * | 2011-07-25 | 2012-03-28 | 浙江精业生化有限公司 | Vacuum system for preparing liquid silicon rubber |
| CN103197702A (en) * | 2012-01-04 | 2013-07-10 | 京元电子股份有限公司 | test pressure control system and method |
| CN203772054U (en) * | 2014-04-11 | 2014-08-13 | 张曙光 | Vacuum-pumping system for multistage steam jet of double-backpressure condenser |
| CN104015714A (en) * | 2014-05-09 | 2014-09-03 | 安徽霍山县东湖汽车贸易有限公司 | Clearance electromobile vacuum generating device |
| CN105021389A (en) * | 2015-07-14 | 2015-11-04 | 浙江大学 | Multifunctional component gas fatigue test system |
| CN104990427A (en) * | 2015-07-30 | 2015-10-21 | 大唐桂冠合山发电有限公司 | System improving vacuum-pumping efficiency of double-backpressure condenser |
| CN207317448U (en) * | 2017-09-19 | 2018-05-04 | 常州市震华干燥设备有限公司 | microwave rotary vacuum drier |
| CN109085793A (en) * | 2018-08-24 | 2018-12-25 | 苏州澳佰特自动化设备有限公司 | A kind of PLC control system of helium leak check filling recyclable device |
| CN209673343U (en) * | 2019-03-19 | 2019-11-22 | 六安一六八航空航天精密器件有限公司 | A kind of bellows low pressure life test apparatus |
| CN211292297U (en) * | 2019-11-28 | 2020-08-18 | 深圳市万斯得自动化设备有限公司 | Positive and negative pressure comprehensive test system |
| CN111302596A (en) * | 2020-03-04 | 2020-06-19 | 南京正诺环保科技有限公司 | Oil sludge drying treatment system and process |
Non-Patent Citations (1)
| Title |
|---|
| 朱岩: "膜盒自动检测系统的设计与实现", 《航空精密制造技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114939445A (en) * | 2022-03-29 | 2022-08-26 | 合肥通用机械研究院有限公司 | Large vacuum degree change test device and test method using same |
| CN114939445B (en) * | 2022-03-29 | 2023-12-22 | 合肥通用机械研究院有限公司 | Large vacuum degree change test device and test method using same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112033662A (en) | Diaphragm capsule life test system | |
| CN211292297U (en) | Positive and negative pressure comprehensive test system | |
| CN202100763U (en) | Pneumatic two-position four-way slide valve | |
| CN108775992A (en) | A kind of simple multifunctional operated pneumatic valve leak detection device and leakage inspection method | |
| CN203979505U (en) | Gas control combination brake switch and proporting | |
| CN113669328B (en) | Device for detecting performance of breather valve of oil tank and test method thereof | |
| CN203376114U (en) | Built-in positive-negative pressure air source for air tightness leak detector | |
| CN108760464A (en) | A kind of method and device for realizing the control of fuel tank positive/negative pressure alternation | |
| CN109139435B (en) | Regulating and controlling method based on peristaltic pump | |
| CN207892815U (en) | A kind of clearance air volume regulating device on reciprocating compressor | |
| CN217878218U (en) | Positive and negative pressure air tightness test system | |
| CN210266253U (en) | Supercharging equipment pipe connection sealing device | |
| CN208076099U (en) | A kind of precision liquid medicine filter exhaust film detecting device | |
| CN113339337A (en) | Automatic supercharging device without emission | |
| CN201277178Y (en) | Gas circuit integrated controller for mining air compressor | |
| CN213478599U (en) | Vacuum pump suitable for multiple industries and capable of automatically adjusting vacuum degree | |
| CN212251237U (en) | Special pneumatic control valve of chemical industry | |
| CN211667219U (en) | Self-operated pressure balance valve | |
| CN205244572U (en) | Use gas accuse valve of cylinder as execute component | |
| CN207064754U (en) | A kind of pressure-reducing valve for compressed natural gas | |
| CN217868887U (en) | Gas circuit control device and cell processing system | |
| CN213655069U (en) | Integrated form vacuum unit | |
| CN111089178A (en) | Inlet electric butterfly valve | |
| CN208104532U (en) | A kind of magnetic-controlled sputtering coating equipment pressure-retaining system | |
| CN116971853B (en) | Compressed air power generation system and power generation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201204 |