CN108614209A - Detection device - Google Patents
Detection device Download PDFInfo
- Publication number
- CN108614209A CN108614209A CN201810605606.6A CN201810605606A CN108614209A CN 108614209 A CN108614209 A CN 108614209A CN 201810605606 A CN201810605606 A CN 201810605606A CN 108614209 A CN108614209 A CN 108614209A
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- pressure
- surge tank
- gas
- gas outlet
- detection device
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- 238000001514 detection method Methods 0.000 title claims abstract description 53
- 238000012360 testing method Methods 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 abstract description 19
- 239000007789 gas Substances 0.000 description 77
- 239000000872 buffer Substances 0.000 description 8
- 230000003139 buffering effect Effects 0.000 description 7
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a kind of detection devices, are related to detection field, and main purpose is to stablize increased air pressure to pressure switch offer, and then in pressure switch trigger action, the accurate startup pressure value for reading pressure switch correctly judges pressure switch state.The present invention main technical schemes be：A kind of detection device, the device include：Surge tank is provided with air inlet, gas outlet and pressure gauge on surge tank；Air inlet is for injecting high pressure gas into surge tank, and gas outlet is for connecting testing pressure relay, and pressure gauge is set at gas outlet, for detecting atmospheric pressure value at gas outlet.Present invention is mainly used for the startup pressure of detection pressure switch.
Description
Technical field
The present invention relates to detection field more particularly to a kind of detection devices.
Background technology
When being overhauled to current conversion station core equipment converter power transformer, a special examination project is load ratio bridging switch pressure
The detection of relay.Pressure switch is the device protected to load ratio bridging switch, is mounted on the oil of load ratio bridging switch
On room, when pressure is excessive in load tap changer oil chamber, pressure switch trigger action disconnects the main open circuit of converter power transformer
Device.By carrying out pressure detecting to pressure switch, it is ensured that pressure switch is acted in defined pressure value, is that loaded tap-off is opened
Close the important link in pressure switch detection.
The pressure switch detection method used at present is connected with pressure switch by inflator, is set in junction
Pointer pressure is set, the pressure input output pressure to pressure switch is inflated by inflator, when reaching certain pressure,
Pressure switch trigger action reads the numerical value that show of pressure gauge, will reading and pressure switch standard startup pressure value into
Row comparison, to judge whether pressure switch is in normal condition.But inflator is connected directly with pressure switch, is inflated
Cylinder is inflated each time can all cause junction air-flow unstable, lead to gauge hand wide fluctuations, can not accurately read pressure
Accurate pressure value when the actuating of relay, to influence the judgement to pressure switch state.
Invention content
In view of this, the embodiment of the present invention provides a kind of detection device, main purpose is to provide stabilization to pressure switch
Increased air pressure, and then in pressure switch trigger action, the accurate startup pressure value for reading pressure switch is correct to judge
Pressure switch state.
In order to achieve the above objectives, present invention generally provides following technical solutions：
An embodiment of the present invention provides a kind of detection device, which includes：
Surge tank is provided with air inlet, gas outlet and pressure gauge on surge tank；
Air inlet is for injecting high pressure gas into surge tank, and gas outlet is for connecting testing pressure relay, pressure gauge
It is set at gas outlet, for detecting atmospheric pressure value at gas outlet.
Optionally, air inlet and gas outlet are respectively arranged at the both ends of surge tank.
Optionally, the air-flow inflow direction of air inlet is vertical with the air-flow of gas outlet outflow direction.
Optionally, surge tank includes cylinder side wall and the hemispherical being connected with cylinder side wall both ends edge envelope
Head, air inlet are set on the hemispherical head of surge tank one end, and gas outlet is set to the cylinder side wall of the surge tank other end
On.
Optionally, further include：The first end of gas-guide tube, gas-guide tube is connected with gas outlet, the second end of gas-guide tube with wait for
Measuring pressure relay is connected.
Optionally, further include：Three-way connection, the first end of three-way connection are connected with the second end of gas-guide tube, and three connect
The second end of head is connected with testing pressure relay, and the third end of three-way connection is connected with pressure gauge.
Optionally, control valve is connected between the second end of three-way connection and testing pressure relay, control valve is for controlling
The break-make of the second end of three-way connection.
Optionally, air inlet is self-sealing gas nozzle.
Optionally, pressure gauge is digital air gauge.
Optionally, it is additionally provided with exhaust outlet on surge tank, for excessive gas in surge tank to be discharged.
A kind of detection device that the embodiment of the present invention proposes, main purpose are to stablize increased gas to pressure switch offer
Pressure, and then in pressure switch trigger action, the accurate startup pressure value for reading pressure switch correctly judges pressure relay
The state of device, and in the prior art, it is connect to pressure switch output pressure with pressure switch by inflator, in junction
Pointer pressure is set, and inflator is inflated each time can all cause junction air-flow unstable, cause gauge hand a wide range of
Fluctuation can not accurately read accurate air pressure when pressure switch action, to influence pair when pressure switch trigger action
The judgement of pressure switch state, compared with prior art, the detection device in present specification are provided with surge tank, are pressing
It during power relay test, is inflated from the air inlet of surge tank into surge tank, gas buffers in surge tank becomes stable
Air-flow after, provide the air pressure of steady growth for pressure switch by the gas outlet of surge tank, pressure gauge reads surge tank and goes out
The atmospheric pressure value of gas port is stablized since buffer tank outlet air pressure increases, in pressure switch trigger action, the reading of pressure gauge
Accurately, when avoiding inflator and directly being connect with pressure switch, pressure switch is unable to judge accurately since air-flow is unstable
The problem of starting pressure ensure that the accuracy of pressure switch detection, it is ensured that the stable operation of converter power transformer.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of detection device provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of surge tank in a kind of detection device provided in an embodiment of the present invention.
Specific implementation mode
The present invention is described in further detail with reference to the accompanying drawings and examples.
As shown in Figure 1 and Figure 2, an embodiment of the present invention provides a kind of detection device, which includes：
Surge tank 1 is provided with air inlet 2, gas outlet 3 and pressure gauge 4 on surge tank 1；
Air inlet 2 is for injecting high pressure gas into surge tank 1, and gas outlet 3 is for connecting testing pressure relay, pressure
Table 4 is set at gas outlet 3, for detecting atmospheric pressure value at gas outlet 3.
Wherein, surge tank 1 is used for air inlet into row buffering, and miniature storage tank can be used in surge tank 1, due to miniature reservoir gas
Memory space is relatively small, and 3 air pressure of gas outlet can be made to be rapidly achieved pressure switch and start pressure, reduce pressure switch inspection
The time cycle of survey, and pressure switch is usually located at higher position from the ground, and miniature tank weights are light, easy to carry and behaviour
Make.Air inlet 2 on surge tank 1 can connect multiple gases output equipment, for example, inflator, air pump etc., air inlet 2 and gas
Body output equipment gas vent fits closely, and gas output equipment is inflated by air inlet 2 to surge tank 1, and gas enters buffering
The air pressure at the gas outlet 3 of surge tank 1 is set slowly to increase, the connection of gas outlet 3 pressure into after row buffering inside the surge tank 1 after tank 1
The pressure input mouth of power relay provides the air pressure being slowly increased to pressure switch, meanwhile, pressure is provided at gas outlet 3
Power table 4, the atmospheric pressure value that detection pressure switch is subject to, when air pressure reaches certain value at gas outlet 3, pressure switch triggering is dynamic
Make, at this point, reading 4 data of pressure gauge, and compared with normal pressure actuating of relay pressure value, whether judges pressure switch
In normal condition, since the stable gas pressure at gas outlet 3 increases, no air-flow fluctuates widely so that 4 data of pressure gauge are read
It is accurate to take.
Specifically, pressure switch is connected with judgment means, judgment means connect the input terminal of controller, trigger action
Output end connects gas output equipment, and judgment means detect whether pressure switch occurs trigger action in real time, when pressure relay
When device reaches certain air pressure trigger action, judgment means send halt signal to controller, and controller is sent according to judgment means
Signal control gas output equipment stop inputting gas into surge tank 1, so that pressure value is kept pressure switch
The pressure value of action moment is constant, and then staff can have the sufficient time to carry out the reading of pressure value, make reading more
Accurately.
A kind of detection device that the embodiment of the present invention proposes, main purpose are to stablize increased gas to pressure switch offer
Pressure, and then in pressure switch trigger action, the accurate startup pressure value for reading pressure switch correctly judges pressure relay
The state of device, and in the prior art, it is connect to pressure switch output pressure with pressure switch by inflator, in junction
Pointer pressure is set, and inflator is inflated each time can all cause junction air-flow unstable, cause gauge hand a wide range of
Fluctuation can not accurately read accurate air pressure when pressure switch action, to influence pair when pressure switch trigger action
The judgement of pressure switch state, compared with prior art, the detection device in present specification are provided with surge tank, are pressing
It during power relay test, is inflated from the air inlet of surge tank into surge tank, gas buffers in surge tank becomes stable
Air-flow after, provide the air pressure of steady growth for pressure switch by the gas outlet of surge tank, pressure gauge reads surge tank and goes out
The atmospheric pressure value of gas port is stablized since buffer tank outlet air pressure increases, in pressure switch trigger action, the reading of pressure gauge
Accurately, when avoiding inflator and directly being connect with pressure switch, pressure switch is unable to judge accurately since air-flow is unstable
The problem of starting air pressure ensure that the accuracy of pressure switch detection, it is ensured that the stable operation of converter power transformer.
Air-flow at air inlet 2 can be made to fluctuate due to inflating into surge tank, air inlet 2 and gas outlet 3 are arranged
Position on surge tank 1 relatively far away from, specifically, the both ends of surge tank 1 can be respectively arranged at, the work of gas output equipment
It generates high-speed flow by the air inlet 2 of 1 one end of air accumulator to be entered, air-flow speed after the buffering of stabilizing gas in surge tank 1
Decline, gas volume increases in surge tank 1, and then the air pressure at the gas outlet 3 of surge tank 1 is made to increase, due to gas outlet 3 and into
Gas port 2 is apart from farther out so that 3 air pressure steadily increases at gas outlet, is not influenced, is avoided out by 2 high-speed flow of air inlet
Gas port 3 is directly connected to the problem of leading to 3 pneumatic floating of gas outlet with air inlet 2.
Specifically, the air-flow inflow direction of air inlet 2 is vertical with the air-flow of gas outlet 3 outflow direction.Due to pressure relay
Device is not easy to remove, it is therefore desirable to which detection device is installed to the inspection that pressure switch position nearby carries out pressure switch
It surveys, it is small, light-weight that the usual installation position of pressure switch is higher, and this requires detection devices, and therefore, detection device uses
Small buffer tank, since small buffer tank both ends distance is shorter, when air-flow by the air inlet 2 of surge tank 1 into fashionable, surge tank 1
It can not fully be slowed down to the air-flow of high speed in time, air pressure at gas outlet 3 can be caused to be affected and generate fluctuation, because
This, setting air inlet 2 is vertical with the airflow direction of gas outlet 3, for example, surge tank 1 is cylindrical buffer tank, air inlet 2 is arranged
At one end on disc, gas outlet 3 is arranged on other end side wall, even if air-flow can if deceleration fully in surge tank 1
Due to slowing down rapidly with the contact of cylindrical buffer tank other end disc, keep gas pressure in surge tank uniform and stable, therefore not
The fluctuation of air pressure at gas outlet 3 can be caused, realizes when surge tank specification is smaller, stable increase can be also provided for pressure switch
Air pressure.
The shape of surge tank 1 can be a variety of, specifically, surge tank 1 can be cylindricality surge tank, including cylinder side wall
11 and the hemispherical head 12 that is connected with 11 both ends edge of cylinder side wall, air inlet 2 be set to the half of 1 one end of surge tank
On dome head 12, gas outlet 3 is set on the cylinder side wall 11 of 1 other end of surge tank.Due to the startup of pressure switch
Pressure may be very big, it is therefore desirable to which surge tank 1 has certain bearing capacity, and hemispherical head 11 is so that Seal Head Strength and tank body
It is equal, wherein cylinder side wall 11 and hemispherical head 12 are an integral molding structure, on the one hand, increase holding for surge tank 1
Pressure energy power, while the generation of 1 gas leak phenomenon of surge tank is avoided, on the other hand, integrated hemispherical head 12 and cylindrical shape
Side wall 11 makes 1 inside of entire surge tank round and smooth, without right angle, avoids generating small-scale air-flow self-loopa, ensures surge tank 1
Interior air pressure fast and stable.Specifically, surge tank 1 uses metal material, increase by 1 intensity of surge tank.
Further, gas-guide tube 5 is provided at the gas outlet 3 of surge tank 1, the first end of gas-guide tube 5 is connected with gas outlet 3
It connects, the second end of gas-guide tube 5 is connected with the pressure input of testing pressure relay.When injecting gas in surge tank 1, delay
It rushes 1 air-flow of tank and generates fluctuation, while air pressure increases rapidly, although without airflow fluctuation at gas outlet 3, since air pressure is rapid
It increases so that air pressure rises with the continuous entrance of gas at staged at gas outlet 3, easily causes the tactile mistake of pressure switch
Action.Gas-guide tube 5 use metal circular tube, 5 diameter of section of gas-guide tube be less than surge tank diameter of section, due to gas-guide tube 5 relative to
Surge tank 1 is relatively thin, and the gas slowly in surge tank 1 provides air pressure by gas-guide tube 5 to pressure switch so that pressure relay
The pressure input pressure change of device is gentler compared to pressure change at gas outlet 3, is conducive to the accurately display pressure of pressure gauge 4
The accuracy of power numerical value and pressure switch trigger action.
Further, three-way connection 6, the first end and gas-guide tube of three-way connection 6 are also associated in the second end of gas-guide tube 5
5 second end is connected, and the second end of three-way connection 6 is connected with the pressure input of testing pressure relay, three-way connection 6
Third end be connected with pressure gauge 4.Specifically, the first end of three-way connection 6 and the third end of three-way connection 6 are located at same
The second end of straight line, three-way connection 6 is vertical with the first end of three-way connection 6 and the third end of three-way connection 6, and pressure gauge 4 passes through
Three-way connection 6 can accurately detect the atmospheric pressure value of the pressure input of testing pressure relay, and 6 side of dismounting of three-way connection
It just, can be opposite with surge tank 1 according to the position flexible transformation pressure gauge 4 and testing pressure relay of testing pressure relay
Position increases the scope of application of detection device.
Wherein, control valve 7, control are connected between the second end of three-way connection 6 and the pressure input of testing pressure relay
Valve 7 processed is used to control the break-make of the second end of three-way connection.In pressure switch detection process, closing control valve 7 is to buffering
Inflation in tank 1, while pressure gauge reading is observed, when air pressure starts pressure close to pressure switch, after air pressure is steady, will examine
Device is surveyed connect with pressure switch, opening control valve 7 continues that, to the inflation of surge tank 1, detection time can be saved, and with
Has bulk gas in surge tank 1 before pressure switch connection so that the gas injected later is being connect with pressure switch
It can preferably be buffered.In addition, closing control valve 7 so that detection device becomes enclosure space, by air inlet 2 to buffering
Inflation can be detected the detection of device seal in tank 1.
Optionally, air inlet 3 is self-sealing gas nozzle, and when air inlet automatically opens, and when gas flow interruption is closed automatically, ensures buffering
The consistency of 2 airflow direction of intake efficiency and air inlet of tank 1, avoids air-flow at air inlet 2 from flowing back.It adopts gas outlet 3
It is connect with the pressure input of pressure switch with quick coupling 8, specifically, the of one end connection three-way connection 6 of control valve 7
The other end at two ends, control valve 7 connects quick coupling 8, and quick coupling 8 is equipped with seal cap, when not connect with pressure switch,
Quick coupling 8 is in closed state, when needing to connect pressure switch, the seal cap of quick coupling 8 is dismantled, by quick coupling
8 connect with the pressure input of pressure switch, assembling speed, fast easy to operation.
It is additionally provided with exhaust outlet on surge tank 1, for excessive gas in air accumulator to be discharged.When detection device detects difference
Pressure switch when, need to provide different air pressures for pressure switch, if pressure switch start pressure it is larger, detection knot
Shu Hou, the air pressure in surge tank 1 is larger, and gas is more, such as discharges gas by gas outlet 3, speed is slow, and efficiency is low, by setting
Exhaust outlet is set, after the completion of one-time detection, excessive gas can be discharged rapidly by exhaust outlet, improves detection efficiency.Meanwhile together
One pressure switch usually requires repeated multiple times detection, with ensure to read it is accurate start pressure, one-time detection complete with
Afterwards, it needs to discharge 1 gas of surge tank, so that air pressure is dropped to and start air pressure or less and detected again, pass through setting
Exhaust outlet substantially increases detection without dismantling detection device between the repeated detection to the same pressure switch
Efficiency and convenience.
Specifically, pressure gauge 4 is digital air gauge, digital air gauge uses digital measuring technique, continuous atmospheric pressure is believed
Number it is converted into discontinuous, discrete atmospheric pressure value and display.In the prior art, pressure switch pressure is measured using pointer air gauge
Power input terminal air pressure, has a single function, and precision is low, and reading is inconvenient, and veteran special messenger is often needed to read, increase manpower at
This, and accuracy is not high.Pointer air gauge, precision height, strong antijamming capability, reading side are replaced using digital air gauge
Just, increase barometric surveying precision, save human cost.Further, controller can be arranged with digital air gauge to be connected, from
The atmospheric pressure value that the dynamic digital air gauge of record is detected when detecting pressure switch trigger action, avoids artificial reading pressure gauge
Time difference when numerical value.
Further, detection device is additionally provided with holder 9, for making detection device standing and plane or being fixed on operation edge of table
Edge facilitates the use of detection device.
Through the above description of the embodiments, it is apparent to those skilled in the art that the present invention can borrow
Help software that the mode of required common hardware is added to realize, naturally it is also possible to which by hardware, but the former is more preferably in many cases
Embodiment.Based on this understanding, the portion that technical scheme of the present invention substantially in other words contributes to the prior art
Dividing can be expressed in the form of software products, which is stored in the storage medium that can be read, and such as count
The floppy disk of calculation machine, hard disk or CD etc., including some instructions are used so that computer equipment (can be personal computer,
Server or the network equipment etc.) execute method described in each embodiment of the present invention.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of detection device, which is characterized in that including：
Surge tank is provided with air inlet, gas outlet and pressure gauge on the surge tank；
The air inlet is for injecting high pressure gas into the surge tank, and the gas outlet is for connecting testing pressure relay
Device, the pressure gauge are set at the gas outlet, for detecting atmospheric pressure value at the gas outlet.
2. detection device according to claim 1, which is characterized in that
The air inlet and the gas outlet are respectively arranged at the both ends of the surge tank.
3. detection device according to claim 2, which is characterized in that
The air-flow inflow direction of the air inlet is vertical with the air-flow of gas outlet outflow direction.
4. detection device according to claim 3, which is characterized in that
The surge tank includes cylinder side wall and the hemispherical head that is connected with cylinder side wall both ends edge, institute
It states air inlet to be set on the hemispherical head of described surge tank one end, the gas outlet is set to the surge tank other end
On cylinder side wall.
5. detection device according to claim 1, which is characterized in that further include：
Gas-guide tube, the first end of the gas-guide tube are connected with the gas outlet, the second end of the gas-guide tube with it is described to be measured
Pressure switch is connected.
6. detection device according to claim 5, which is characterized in that further include：
Three-way connection, the first end of the three-way connection are connected with the second end of the gas-guide tube, and the of the three-way connection
Two ends are connected with the testing pressure relay, and the third end of the three-way connection is connected with the pressure gauge.
7. detection device according to claim 6, which is characterized in that
Control valve is connected between the second end of the three-way connection and the testing pressure relay, the control valve is for controlling
The break-make of the second end of the three-way connection.
8. detection device according to claim 1, which is characterized in that
The air inlet is self-sealing gas nozzle.
9. detection device according to claim 1, which is characterized in that
The pressure gauge is digital air gauge.
10. detection device according to claim 1, which is characterized in that
It is additionally provided with exhaust outlet on the surge tank, for excessive gas in the surge tank to be discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810605606.6A CN108614209A (en) | 2018-06-13 | 2018-06-13 | Detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810605606.6A CN108614209A (en) | 2018-06-13 | 2018-06-13 | Detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108614209A true CN108614209A (en) | 2018-10-02 |
Family
ID=63665079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810605606.6A Pending CN108614209A (en) | 2018-06-13 | 2018-06-13 | Detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108614209A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109581230A (en) * | 2018-11-27 | 2019-04-05 | 上海理工大学 | Soft-package battery outer surface constant pressure that compressed gas is adjustable pre-tightens test device and method |
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| JP2000155063A (en) * | 1998-11-20 | 2000-06-06 | Saginomiya Seisakusho Inc | Pressure monitoring device and method for electrical insulating gas |
| CN201043925Y (en) * | 2007-05-10 | 2008-04-02 | 山东华腾环保科技有限公司 | Air pressure switch checking device of passenger train toilet |
| CN201397375Y (en) * | 2009-05-12 | 2010-02-03 | 上海电力变压器修试厂有限公司 | Pressure detection device for pressure relay |
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| CN203772484U (en) * | 2014-04-21 | 2014-08-13 | 山西大运汽车制造有限公司 | Performance testing apparatus for automotive air pressure sensor and pressure switch |
| CN204461733U (en) * | 2015-02-28 | 2015-07-08 | 沈阳鸿嘉达电气设备有限公司 | Transformer multi-function protector pressure switch detection device |
| CN204964706U (en) * | 2015-08-26 | 2016-01-13 | 北汽福田汽车股份有限公司 | Pressure switch detection device |
| CN206773149U (en) * | 2017-04-10 | 2017-12-19 | 国家电网公司 | Portable pressure device for checking electric relay |
| CN208188295U (en) * | 2018-06-13 | 2018-12-04 | 北京送变电有限公司 | Detection device |
-
2018
- 2018-06-13 CN CN201810605606.6A patent/CN108614209A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980022238A (en) * | 1996-09-20 | 1998-07-06 | 조희재 | Pressure switch measuring device and method |
| JP2000155063A (en) * | 1998-11-20 | 2000-06-06 | Saginomiya Seisakusho Inc | Pressure monitoring device and method for electrical insulating gas |
| CN201043925Y (en) * | 2007-05-10 | 2008-04-02 | 山东华腾环保科技有限公司 | Air pressure switch checking device of passenger train toilet |
| CN201397375Y (en) * | 2009-05-12 | 2010-02-03 | 上海电力变压器修试厂有限公司 | Pressure detection device for pressure relay |
| CN201889590U (en) * | 2010-12-03 | 2011-07-06 | 天水锻压机床有限公司 | Continuous air feeding device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109581230A (en) * | 2018-11-27 | 2019-04-05 | 上海理工大学 | Soft-package battery outer surface constant pressure that compressed gas is adjustable pre-tightens test device and method |
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