CN206787756U - A kind of pressure sensor with pressure-limiting function - Google Patents
A kind of pressure sensor with pressure-limiting function Download PDFInfo
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- CN206787756U CN206787756U CN201720676398.XU CN201720676398U CN206787756U CN 206787756 U CN206787756 U CN 206787756U CN 201720676398 U CN201720676398 U CN 201720676398U CN 206787756 U CN206787756 U CN 206787756U
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- block
- sensor
- pressure
- pushing block
- diaphragm
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Abstract
The utility model discloses a kind of pressure sensor with pressure-limiting function, including matrix, presser sensor diaphragm and pushing block, the sensor cavity for placement force sensitive diaphragm and pushing block is provided with described matrix, silicone oil is filled between the presser sensor diaphragm and pushing block, it is characterised in that：The fluid passage connected with sensor cavity is additionally provided with described matrix, the limited block and block being mutually adapted are provided with the circulation passage, the block is connected by push rod with pushing block；The utility model limits the sliding scale of pushing block by limited block, so as to limit the maximum pressure value that presser sensor diaphragm is subject to, realizes effective protection to pressure sensor.
Description
Technical field
It the utility model is related to sensor technical field, and in particular to a kind of pressure sensor with pressure-limiting function.
Background technology
The oil-filled type pressure sensor of traditional isolation diaphragm has sensor isolation diaphragm, medium silicone oil, chamber, presser sensor
Diaphragm and sensor base are formed, and pressure is acted on sensor isolation diaphragm, conduct institute's measuring pressure to pressure by medium silicone oil
Power sensitive diaphragm, sensitive diaphragm Displacement-deformation produce the signal corresponding with institute measuring pressure.Due to normal single-chamber body barrier film
The oil-filled type pressure sensor of piece, in general overload capacity is 5-10 times of sensor full scale, therefore is sensed when range is smaller
The overload capacity of device is weaker, is easily damaged；And basic device of the sensor as Automated condtrol, it is once damaged
The bad normal work that will influence whole system, therefore the reliability of sensor is to maintain the premise of automated system normal work
Condition.
Publication No. CN203323954U Chinese utility model patent discloses band overvoltage protection on December 4th, 2013
The pressure sensor of device, including matrix, sensor cavity is provided with matrix, pressure sensitive film is provided with sensor cavity body
Piece, silicone oil is provided with sensor cavity body；Isolation diaphragm is provided with below pedestal；Overvoltage protection dress is additionally provided with pedestal
Put；Over-pressure safety device includes the pressurize chamber being connected with sensor cavity, passes through transition between pressurize chamber and sensor cavity
Cavity is connected；Pressurize intracavitary is provided with piston, and the piston rod on piston is located in transitional cavity；The cross-sectional area of piston rod is small
In the cross-sectional area of piston；Pressurize intracavitary is provided with gases at high pressure, and the pressure of gases at high pressure is the 2 of the full-scale pressure of sensor
More than times.Pressure sensor of the present utility model with over-pressure safety device, having can realize to pressure sensor sensitive membrane
The safeguard protection of piece, prevent cell overload from damaging and the advantages that be simple to manufacture, reduce the cost of manufacture of sensor.
The content of the invention
For the defects of pressure sensor safeguard measure deficiency, the utility model discloses one kind present in prior art
Pressure sensor with voltage-limiting protection function, the utility model can pressure value exceed setting threshold values after restriction effect in
The pressure value of pressure sensor, the irreversible damage caused by the factor such as pressure is excessive is to sensor is avoided, so as to protect pressure
The safety of sensor.
The utility model is achieved through the following technical solutions above-mentioned purpose：
A kind of pressure sensor with voltage-limiting protection function, including matrix, presser sensor diaphragm and pushing block, described matrix
On be provided with sensor cavity for placement force sensitive diaphragm and pushing block, filled between the presser sensor diaphragm and pushing block
There is silicone oil, it is characterised in that：The fluid passage connected with sensor cavity is additionally provided with described matrix, in the fluid passage
The limited block and block being mutually adapted are provided with, the block is connected by push rod with pushing block.
The side of the pushing block and block is provided with closure gasket groove, and sealing ring is provided with the closure gasket groove.
To be threadedly coupled between the block and push rod, be formed in one structure between push rod and pushing block.
The limited block and matrix are formed in one structure.
Cushion rubber bumper is provided with the limited block.
Screwed connection has end cover on the sensor cavity.
Compared with prior art, the utility model has the advantages that：
1st, the utility model is provided with pushing block in sensor cavity, and sensor cavity is connected by fluid passage with extraneous
It is logical, limited block and block are provided with the fluid passage, the block is connected by push rod with pushing block；Limit of the present utility model
Position block can limit the scope of activities of pushing block, so that it is determined that maximum of the pushing block to the active force of silicone oil, that is to say and define pressure
The upper limit of power sensitive diaphragm measurement range, it is achieved thereby that effective protection under overpressure situation to pressure sensor.
2nd, the side of pushing block and block of the present utility model is provided with closure gasket groove, is provided with the closure gasket groove close
Seal ring, on the one hand silicone oil is isolated with fluid to be measured, avoid pollution caused by being mutually mixed, on the other hand ensure the effect of pressure limiting
Fruit, avoid fluid to be measured from entering raising presser sensor diaphragm in sensor cavity and be under pressure, improve to presser sensor diaphragm
Protecting effect.
3rd, block of the present utility model facilitates assembling and the maintenance work of sensor by being threadably mounted on push rod
Make；The push rod and pushing block are formed in one structure, and the limited block and matrix are formed in one structure, improve each structure it
Between structural strength, avoid being broken caused by prolonged collision, so as to improve the service life of pressure sensor.
4th, cushion rubber bumper is provided with limited block of the present utility model, reduces the impact strength of limited block and block, simultaneously
Reduce the service life and measurement accuracy for because of noise caused by shock and vibration, improving pressure sensor.
5th, end cover has been connected through a screw thread in sensor cavity body of the present utility model, convenient installation or replacing pressure are quick
Feel diaphragm, while the maintenance difficulties of pressure sensor can also be reduced, improve the recycling rate of waterused of matrix.
Brief description of the drawings
Fig. 1 is the utility model structure diagram；
Reference：1st, matrix, 2, presser sensor diaphragm, 3, pushing block, 4, sensor cavity, 5, silicone oil, 6, fluid passage,
7th, limited block, 8, block, 9, push rod, 10, closure gasket groove, 11, sealing ring, 12, cushion rubber bumper, 13, end cover.
Embodiment
The utility model will be described further by specific embodiment below：
Embodiment 1
The present embodiment is as most preferred embodiment of the present utility model, and it discloses a kind of pressure with voltage-limiting protection function
Sensor, as shown in figure 1, including matrix 1, the sensor cavity for placement force sensitive diaphragm 2 is provided with described matrix 1
4, one end of the sensor cavity 4 is sealed by end cover 13, the other end of sensor cavity 4 by fluid passage 6 with
External world's connection；Presser sensor diaphragm 2 and pushing block 3 are provided with the sensor cavity 4, between presser sensor diaphragm 2 and pushing block 3
Filled with silicone oil 5, the pushing block 3 is provided with the push rod 9 being inserted into inside fluid passage 6 towards the one side of fluid passage 6, described
Push rod 9 is connected by screw thread with block 8；The limited block 7 being adapted with block 8 is provided with the fluid passage 6, for limiting
The range of movement of block 8.
The side of the pushing block 3 and block 8 is provided with closure gasket groove 10, and sealing ring is provided with the closure gasket groove 10
11。
Be formed in one structure between push rod 9 and pushing block 3.
The limited block 7 and matrix 1 are formed in one structure.
The one side relative with block 8 is fixedly installed cushion rubber bumper 12 on the limited block 7.
Operation principle of the present utility model：When measuring the pressure value of fluid to be measured, fluid to be measured enters the utility model
In to fluid passage and act on block, by promoting block to promote pushing block to be moved to close to the direction of presser sensor diaphragm,
Pushing block pushes away oil by extruding makes the pressure value of presser sensor diaphragm measurement fluid to be measured, when the pressure value of fluid to be measured is larger,
Limited block can prevent the motion of block, so that pushing block stop motion, now no matter how the pressure value of fluid to be measured changes, pressure
The distance between power sensitive diaphragm and pushing block immobilize, therefore the pressure that presser sensor diaphragm is subject to is constant all the time, so as to real
Now to the protection of presser sensor diaphragm.
Claims (6)
1. a kind of pressure sensor with voltage-limiting protection function, including matrix（1）, presser sensor diaphragm（2）And pushing block（3）,
Described matrix（1）On be provided with for placement force sensitive diaphragm（2）And pushing block（3）Sensor cavity（4）, the pressure is quick
Feel diaphragm（2）And pushing block（3）Between be filled with silicone oil（5）, it is characterised in that：Described matrix（1）On be additionally provided with and sensor
Cavity（4）The fluid passage of connection（6）, the fluid passage（6）Inside it is provided with the limited block being mutually adapted（7）And block（8）,
The block（8）Pass through push rod（9）With pushing block（3）It is connected.
A kind of 2. pressure sensor with voltage-limiting protection function according to claim 1, it is characterised in that：The pushing block
（3）And block（8）Side be provided with closure gasket groove（10）, the closure gasket groove（10）Inside it is provided with sealing ring（11）.
A kind of 3. pressure sensor with voltage-limiting protection function according to claim 1, it is characterised in that：The block
（8）With push rod（9）Between for threaded connection, push rod（9）With pushing block（3）Between be formed in one structure.
A kind of 4. pressure sensor with voltage-limiting protection function according to claim 1, it is characterised in that：It is described spacing
Block（7）With matrix（1）Be formed in one structure.
A kind of 5. pressure sensor with voltage-limiting protection function according to claim 1, it is characterised in that：It is described spacing
Block（7）On be provided with cushion rubber bumper（12）.
A kind of 6. pressure sensor with voltage-limiting protection function according to claim 1, it is characterised in that：The sensing
Device cavity（4）Upper screwed connection has end cover（13）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720676398.XU CN206787756U (en) | 2017-06-12 | 2017-06-12 | A kind of pressure sensor with pressure-limiting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720676398.XU CN206787756U (en) | 2017-06-12 | 2017-06-12 | A kind of pressure sensor with pressure-limiting function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206787756U true CN206787756U (en) | 2017-12-22 |
Family
ID=60717157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720676398.XU Expired - Fee Related CN206787756U (en) | 2017-06-12 | 2017-06-12 | A kind of pressure sensor with pressure-limiting function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206787756U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108020356A (en) * | 2017-11-27 | 2018-05-11 | 江西新力传感科技有限公司 | A kind of MEMS pressure sensor and its method for packing |
| CN109738107A (en) * | 2019-01-04 | 2019-05-10 | 胡靖阳 | A kind of pressure sensor of hydraulic oil formula high stable |
| CN111855069A (en) * | 2019-04-26 | 2020-10-30 | 株式会社鹭宫制作所 | Pressure sensor |
| CN112326095A (en) * | 2020-11-03 | 2021-02-05 | 安徽安广电气有限公司 | Monocrystalline silicon pressure transmitter with good waterproof performance |
| CN114563123A (en) * | 2022-04-28 | 2022-05-31 | 成都凯天电子股份有限公司 | External excitation type vibration cylinder pressure sensor and pressure calculation method thereof |
-
2017
- 2017-06-12 CN CN201720676398.XU patent/CN206787756U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108020356A (en) * | 2017-11-27 | 2018-05-11 | 江西新力传感科技有限公司 | A kind of MEMS pressure sensor and its method for packing |
| CN109738107A (en) * | 2019-01-04 | 2019-05-10 | 胡靖阳 | A kind of pressure sensor of hydraulic oil formula high stable |
| CN111855069A (en) * | 2019-04-26 | 2020-10-30 | 株式会社鹭宫制作所 | Pressure sensor |
| CN111855069B (en) * | 2019-04-26 | 2022-03-22 | 株式会社鹭宫制作所 | Pressure sensor |
| CN112326095A (en) * | 2020-11-03 | 2021-02-05 | 安徽安广电气有限公司 | Monocrystalline silicon pressure transmitter with good waterproof performance |
| CN112326095B (en) * | 2020-11-03 | 2022-05-20 | 安徽安广电气有限公司 | Monocrystalline silicon pressure transmitter with good waterproof performance |
| CN114563123A (en) * | 2022-04-28 | 2022-05-31 | 成都凯天电子股份有限公司 | External excitation type vibration cylinder pressure sensor and pressure calculation method thereof |
| CN114563123B (en) * | 2022-04-28 | 2022-09-09 | 成都凯天电子股份有限公司 | External excitation type vibration cylinder pressure sensor and pressure calculation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| 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: 20171222 Termination date: 20180612 |