CN203422190U - Over-pressure protector of differential pressure sensor - Google Patents
Over-pressure protector of differential pressure sensor Download PDFInfo
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- CN203422190U CN203422190U CN201320563536.5U CN201320563536U CN203422190U CN 203422190 U CN203422190 U CN 203422190U CN 201320563536 U CN201320563536 U CN 201320563536U CN 203422190 U CN203422190 U CN 203422190U
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- differential pressure
- pressure
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- pressure pick
- nozzle
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Abstract
The utility model provides an over-pressure protector of a differential pressure sensor. The over-pressure protector comprises two gas paths, each gas path is provided with a non return valve, the non return valves of the two gas paths are oppositely arranged, and the connection ports of the two gas paths are respectively connected with two cavities of the differential pressure sensor. The over-pressure protector solves the problem of poor single-side pressure tolerance of the differential pressure sensor, which means that when the pressure difference of two sides of the differential pressure sensor is too high, the cavities at two sides of the differential pressure sensor are communicated, pressure balance of the two sides is achieved, and thereby the sensor is effectively protected against damage caused by too high single-side pressure.
Description
Technical field
The utility model relates to a kind of over-pressure safety device of differential pressure pick-up, belongs to differential pressure measurement technical field.
Background technology
The general common mode of differential pressure pick-up is withstand voltage higher, and one-sided withstand voltage lower.Due to the moment of inflating in reality use, the aeration speed of differential pressure pick-up both sides is almost unlikely in full accord, will cause like this differential pressure pick-up instantaneous pressure poor very large, and in use procedure, also inevitably occur that some pressure at both sides that surprisingly cause differential pressure pick-up are poor and become very large, during as differential pressure leak detection, the large leakage of one side will cause the poor change of pressure at both sides large, when pressure differential surpasses differential pressure pick-up one-sided withstand voltage, will damage sensor; Therefore, need to aly can control the poor device of differential pressure pick-up pressure at both sides, prevent from due to the poor superpressure of pressure at both sides, damaging in use procedure the situation of differential pressure pick-up.
Summary of the invention
Problem to be solved in the utility model is to provide a kind of due to the poor excessive protective device that damages sensor of differential pressure pick-up both sides chamber pressure.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of differential pressure pick-up over-pressure safety device is provided, comprises two gas circuits that are connected in parallel, each gas circuit is equipped with a retaining valve, and the retaining valve opposite direction in two gas circuits is installed; The connector of two gas circuits is connected with two cavitys of differential pressure pick-up respectively.
When the pressure differential of two cavitys of differential pressure pick-up surpasses certain value, corresponding retaining valve is opened, and now two cavitys are connected, and the effect of protection differential pressure pick-up is played in pressure equilibrium.
Further, described retaining valve comprises nozzle, spring, sealing gasket and spring base; Described nozzle is provided with an air hole; Described spring base is multidiameter shape, its path section pocketed springs, and the end face center of its large footpath section is provided with a groove, Matching installation sealing gasket in this groove; This sealing gasket and the corresponding contact of air hole on nozzle, by sealed nozzle.
Under normal circumstances, spring compression spring base, sealing gasket is blocked nozzle, when two chamber pressures of differential pressure pick-up are poor while reaching certain value, air pressure backs down spring base, and nozzle is opened, and two cavitys of differential pressure pick-up are communicated with, pressure at both sides balance, protects differential pressure pick-up effectively; According to the differential pressure pick-up of different ranges, select different springs, can regulate the opening pressure of retaining valve, make it to match with the range of differential pressure pick-up.
Advantage and the good effect that the utlity model has are: this device has solved due to the one-sided withstand voltage too low problem of differential pressure pick-up; when differential pressure pick-up pressure at both sides is poor when excessive; this device will be communicated with the cavity of sensor both sides; make pressure at both sides balance; thereby avoid, due to the excessive sensor that damages of one-sided pressure, effectively sensor protection being got up.
Accompanying drawing explanation
Fig. 1 is the system connection diagram of the utility model specific embodiment differential pressure pick-up over-pressure safety device;
Fig. 2 is the structural representation of the first retaining valve in Fig. 1;
Fig. 3 is the structural representation of the second retaining valve in Fig. 1.
In figure: 1. the first cavity, 2. the second cavity, 3. differential pressure pick-up, the 4. over-pressure safety device of differential pressure pick-up, 5. the first retaining valve, 6. the second retaining valve, 7. diaphragm, 8. nozzle, 9. spring, 10. sealing gasket, 11. spring bases.
P1 is the air pressure in differential pressure pick-up the first cavity, the air pressure in P2 differential pressure pick-up the second chamber.
Embodiment
The present embodiment is a kind of differential pressure pick-up over-pressure safety device, as shown in Figure 1, comprises two gas circuits that are connected in parallel, and each gas circuit is equipped with a retaining valve, and the retaining valve opposite direction being respectively in the first retaining valve 5 and 6, two gas circuits of the second retaining valve is installed; The connector of two gas circuits is connected with two cavitys of differential pressure pick-up 3 respectively, i.e. the first cavity 1 and the second cavity 2.
As shown in Figures 2 and 3, two retaining valves include nozzle 8, spring 9, sealing gasket 10 and spring base 11; Nozzle 8 is provided with an air hole; Spring base 11 is multidiameter shape, its path section pocketed springs 9, and the end face center of its large footpath section is provided with a groove, Matching installation sealing gasket 10 in this groove; This sealing gasket 10 and the corresponding contact of air hole on nozzle 8, by nozzle 8 sealings.
In the present embodiment, when differential pressure pick-up the first cavity 1 and the second cavity 2 pressure differentials are within the scope of service pressure,, when ︱ P1-P2 ︱≤△ P, differential pressure pick-up over-pressure safety device keeps sealing state, differential pressure pick-up normal operation; When differential pressure pick-up the first cavity 1 and the second cavity 2 pressure differentials are raised to design load △ P, during P1-P2 >=△ P, the first retaining valve 5 is opened, and two cavitys are connected, and pressure reaches balance; In like manner, when the pressure differential of the second cavity 2 and the first cavity 1 is raised to design load △ P, during P2-P1 >=△ P, the second retaining valve 6 is opened, and two cavitys are connected, and pressure reaches balance, thereby reaches the object of protection differential pressure pick-up.
In the present embodiment; under normal circumstances; spring 9 holddown spring seats 11, make sealing gasket 10 that nozzle 8 is blocked, when two chamber pressures of differential pressure pick-up 3 are poor while reaching certain value; air pressure backs down spring base 11; nozzle 8 is opened, two cavitys of differential pressure pick-up 3 are communicated with, pressure at both sides balance; thereby effectively differential pressure pick-up is protected, as shown in Figures 2 and 3.
Differential pressure pick-up over-pressure safety device in the present embodiment adopts the principle of two retaining valves in parallel; retaining valve is by initial tension of spring sealing; when surpassing certain value, the pressure differential of differential pressure pick-up both sides will break the stress balance of retaining valve; thereby that corresponding with it retaining valve will be opened; make the pressure equilibrium of both sides, to play the effect of protection differential pressure pick-up.
Above an embodiment of the present utility model is had been described in detail, but described content is only preferred embodiment of the present utility model, can not be considered to for limiting practical range of the present utility model.All equalization variations of doing according to the utility model application range and improvement etc., within all should still belonging to patent covering scope of the present utility model.
Claims (2)
1. a differential pressure pick-up over-pressure safety device, is characterized in that: comprise two gas circuits that are connected in parallel, each gas circuit is equipped with a retaining valve, and the retaining valve opposite direction in two gas circuits is installed; The connector of two gas circuits is connected with two cavitys of differential pressure pick-up respectively.
2. differential pressure pick-up over-pressure safety device according to claim 1, is characterized in that: described retaining valve comprises nozzle, spring, sealing gasket and spring base; Described nozzle is provided with an air hole; Described spring base is multidiameter shape, its path section pocketed springs, and the end face center of its large footpath section is provided with a groove, Matching installation sealing gasket in this groove; This sealing gasket and the corresponding contact of air hole on nozzle, by sealed nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320563536.5U CN203422190U (en) | 2013-09-11 | 2013-09-11 | Over-pressure protector of differential pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320563536.5U CN203422190U (en) | 2013-09-11 | 2013-09-11 | Over-pressure protector of differential pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203422190U true CN203422190U (en) | 2014-02-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320563536.5U Expired - Fee Related CN203422190U (en) | 2013-09-11 | 2013-09-11 | Over-pressure protector of differential pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203422190U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103454040A (en) * | 2013-09-11 | 2013-12-18 | 博益(天津)气动技术研究所有限公司 | Overpressure protective device for differential pressure transducer |
| CN106872097A (en) * | 2017-04-28 | 2017-06-20 | 广东省中山市质量计量监督检测所 | A kind of differential pressure transmitter with protection device |
-
2013
- 2013-09-11 CN CN201320563536.5U patent/CN203422190U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103454040A (en) * | 2013-09-11 | 2013-12-18 | 博益(天津)气动技术研究所有限公司 | Overpressure protective device for differential pressure transducer |
| CN106872097A (en) * | 2017-04-28 | 2017-06-20 | 广东省中山市质量计量监督检测所 | A kind of differential pressure transmitter with protection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: TIANJIN BOYI PNEUMATIC TECHNOLOGY INSTITUTE CO., L Free format text: FORMER NAME: BOYI (TIANJIN) PNEUMATIC TECHNOLOGY INST. CO. LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 300457 Tianjin Binhai New Area Development Zone No. 80 ninth street Fenghua Industrial Park No. 7 Factory Patentee after: BOYI (TIANJIN) PNEUMATIC TECHNOLOGY INSTITUTE CO., LTD. Address before: 300457 Tianjin Binhai New Area Development Zone No. 80 ninth street Fenghua Industrial Park No. 7 Factory Patentee before: Boyi (Tianjin) Pneumatic Technology Inst. Co. Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140205 Termination date: 20170911 |