CN201060083Y - Overload protection device of gas pressure sensor - Google Patents
Overload protection device of gas pressure sensor Download PDFInfo
- Publication number
- CN201060083Y CN201060083Y CNU2007200967814U CN200720096781U CN201060083Y CN 201060083 Y CN201060083 Y CN 201060083Y CN U2007200967814 U CNU2007200967814 U CN U2007200967814U CN 200720096781 U CN200720096781 U CN 200720096781U CN 201060083 Y CN201060083 Y CN 201060083Y
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- pressure
- gas
- overload protection
- sensing device
- pressure sensor
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Abstract
The utility model relates to an overload protective device of an air pressure sensor, which comprises a shell body. A pressure transmission part, a pressure sensitive element part and a circuit board are arranged in the shell body. The pressure transmission part is provided with a pressure interface. One end of the interface passes through the shell body to communicate with an air supply, and the other end is communicated with the pressure sensitive element part. An air hole is arranged in the pressure interface. The pressure sensitive element part is connected with the circuit board. The pressure sensitive element part mainly comprises a pressure guiding pipe and a pressure sensitive element. The improvement part is that the pressure interface of the pressure transmission part is provided with a gas flow limiting structure, and a pressure releasing structure is arranged between the pressure transmission part and the pressure sensitive element part. Under the condition that the gas with higher pressure is added to the air pressure sensor, the flow of the gas can be limited through the flow limiting structure, and air pressure can be released through the elastic expansion of the volume of the releasing structure. Thus, the overload capacity of the air pressure sensor is improved, and the efficacy that the air pressure sensor is protected is achieved.
Description
Technical field
The utility model relates to the instrument and meter device, relates in particular to a kind ofly under the situation of gaseous tension overload, can protect the overload protection arrangement of the gas pressure sensor of pressure transducer.
Background technology
Pressure transducer is industrial processes control robotization " organ ", is undertaking the detected pressures variable, and the measured value that changes to control maincenter feedback states, and adjusts steering order in real time, makes production run be in optimum all the time.In the advanced information society, the main force that pressure transducer is rebuild traditional industry as application electric technology, cause increasing scientific and technical personnel's attention day by day, use diffuse si, the sensor of advanced technologies such as heat energy, magnetics, piezoelectricity is constantly succeeded in developing, and is widely used in many different day by day fields, comprise such as fields such as medical instruments process control of automobile applicable industry and avionics industries such as engine control and tire pressure monitoring.
Gas pressure sensor is to make variation of gas pressure, changes the device of electric quantity change into.Existing gas pressure sensor mainly comprises housing, is provided with pressure transmission part, pressure-sensing device part and circuit board in the housing; Pressure transmission partly is provided with the pressure interface of connecting with source of the gas, and this interface one end passes housing, and the other end is partly connected via pressure transmission pipe and pressure-sensing device, is provided with air hole in the pressure interface; The pressure-sensing device part is connected with circuit board, and the pressure-sensing device part mainly comprises pressure guiding pipe and pressure-sensing device.During use, pressure interface and source of the gas to be measured are connected, open gas pressure sensor, the gaseous tension of source of the gas to be measured passes to the pressure-sensing device part through hop, pressure-sensing device is according to the gas pressure value of source of the gas, produce electric signal by circuit board, the user receives the electric signal that produces by control device, can obtain the actual pressure condition of source of the gas to be measured.
Pressure-sensing device is a core component in the gas pressure sensor, and in actual use, it probably can be coupled with higher pressure, when especially using in elementary errors pressure fields of measurement.Because the service pressure of gas pressure sensor design is very low, if it is careless or under the situation of maloperation, be coupled with the pressurized air of common factory, this compressed-air actuated pressure is the hundred times of gas pressure sensor service pressure even nearly thousand times often, like this, will inevitably damage gas pressure sensor, influence its serviceability.Although manufacturer is when the design pressure sensitive element, will consider the overload capacity that as far as possible improves pressure-sensing device, but under the prerequisite of not too high increase production cost, the overload pressure that pressure-sensing device can bear remains limited, generally only can reach about hundred times of service pressure.For this reason, the method that the overload valve is installed in the employing that has in the industry additional improves the overload capacity of pressure-sensing device, but it has caused defective that cost increases and volume strengthens again, so promotes the use of and be restricted.
The utility model content
Fundamental purpose of the present utility model is to overcome the above-mentioned shortcoming that existing product exists; and provide a kind of overload protection arrangement of gas pressure sensor; it is in the transport part of pressure transducer flow restriction and releasing structure to be set; be coupled with at gas pressure sensor under the situation of the higher gas of pressure; can limit the flow of gas by flow restriction; and the elastic expansion by the releasing structure volume; discharge gaseous tension; thereby improve the overload capacity of gas pressure sensor, reach the effect of blanket gas pressure transducer.
The purpose of this utility model is realized by following technical scheme.
The overload protection arrangement of the utility model gas pressure sensor comprises housing, is provided with pressure transmission part, pressure-sensing device part and circuit board in the housing; Pressure transmission partly is provided with pressure interface, and this interface one end passes housing for connecting source of the gas, and the other end and pressure-sensing device are partly connected, and are provided with air hole in the pressure interface; The pressure-sensing device part is connected with circuit board, and the pressure-sensing device part mainly comprises pressure guiding pipe and pressure-sensing device; It is characterized in that the pressure interface place of described pressure transmission part is provided with the Gas flow-limiting structure; Be provided with the pressure releasing structure between described pressure transmission part and the pressure-sensing device part.
The overload protection arrangement of aforesaid gas pressure sensor, wherein the Gas flow-limiting structure is that air hole internal fixation at pressure interface is provided with filamentous.
The overload protection arrangement of aforesaid gas pressure sensor, wherein filamentous is tinsel or plastics silk.
The overload protection arrangement of aforesaid gas pressure sensor, wherein the difference of the external diameter of filamentous and air hole internal diameter is 0.1mm to 0.3mm, the length of filamentous is less than or equal to the length of air hole.
The overload protection arrangement of aforesaid gas pressure sensor, wherein the pressure releasing structure is the pressure transmission pipe, and this pressure transmission Guan Yiduan is connected with the pressure interface of pressure transmission part, and the other end is connected with the pressure guiding pipe of pressure-sensing device part.
The overload protection arrangement of aforesaid gas pressure sensor, wherein pressure transmission tube wall thickness is 0.5mm to 3mm.
The overload protection arrangement of aforesaid gas pressure sensor, wherein the pressure transmission pipe is made for the elasticity soft material.
The overload protection arrangement of aforesaid gas pressure sensor, wherein the elasticity soft material is plastics or rubber.
The beneficial effect of the overload protection arrangement of the utility model gas pressure sensor; it is that hop at pressure transducer is provided with flow restriction and releasing structure; be coupled with at gas pressure sensor under the situation of the higher gas of pressure; can limit the flow of gas by flow restriction; and the elastic expansion by the releasing structure volume; discharge gaseous tension; improve the overload capacity of gas pressure sensor; make its overload capacity reach 10 to 20 times of original design, effectively the blanket gas pressure transducer.
Description of drawings:
Fig. 1 is the utility model one-piece construction synoptic diagram.
Fig. 2 is the utility model flow restriction end face enlarged diagram.
Major label description in figure: 1 pressure interface, 11 air holes, 12 filamentous, 2 pressure transmission pipes, 3 presser sensors part, 31 pressure guiding pipes, 4 circuit boards.
Embodiment
Consult shown in Figure 1ly, the overload protection arrangement of the utility model gas pressure sensor mainly comprises housing, is provided with pressure transmission part, pressure-sensing device part and circuit board in the housing; Pressure transmission partly is provided with pressure interface, and this interface one end passes housing and source of the gas is connected, and the other end and pressure-sensing device are partly connected, and are provided with air hole in the pressure interface; The pressure-sensing device part is connected with circuit board, and the pressure-sensing device part mainly comprises pressure guiding pipe and pressure-sensing device; Its improvements are that pressure interface 1 place of pressure transmission part is provided with the Gas flow-limiting structure; Be provided with the pressure releasing structure between pressure transmission part and the pressure-sensing device part.
Consult shown in Figure 2; the overload protection arrangement of the utility model gas pressure sensor; its Gas flow-limiting structure is that air hole 11 internal fixation at pressure interface 1 are provided with filamentous 12; this filamentous 12 is tinsel or plastics silk; the difference of the external diameter of filamentous and air hole internal diameter is 0.1mm to 0.3mm, and the length of filamentous is less than or equal to the length of air hole 11.
Consult shown in Figure 1, the overload protection arrangement of the utility model gas pressure sensor, its pressure releasing structure is a pressure transmission pipe 2, and these pressure transmission pipe 2 one ends are connected with the pressure interface 1 of pressure transmission part, and the other end is connected with the pressure guiding pipe 31 of pressure-sensing device part 3; These pressure transmission pipe 2 pipe thicknesses are 0.5mm to 3mm, and the pressure transmission pipe is made for the elasticity soft material; This elasticity soft material is plastics or rubber.
The preparation assembling of the overload protection arrangement of the utility model gas pressure sensor; at first, select the copper wire of external diameter for use, intercepted length 10mm than the little 0.1mm of air hole internal diameter; to be inserted in the air hole of pressure interface behind this copper wire slight curvature, and it is fixed in the air hole.Then, select silicone rubber tube for use, pipe thickness is 1mm, and silicone rubber tube one end of this specification is socketed in the pressure interface end that is positioned at housing, and the preparation assembling is promptly finished in the pressure guiding pipe socket of the other end and presser sensor part.
When the overload protection arrangement of the utility model gas pressure sensor uses; pressure interface and source of the gas to be measured are connected; open gas pressure sensor; the gaseous tension of source of the gas to be measured partly passes to the pressure-sensing device part through pressure transmission; pressure-sensing device is according to the gas pressure value of source of the gas; produce electric signal by circuit board, the user receives the electric signal that produces by control device, can obtain the actual pressure condition of source of the gas to be measured.In case this gas pressure sensor is coupled with the gas of excess pressure, because the setting of overload device flow restriction promptly is provided with copper wire 12 in pressure interface 1 air hole 11, the net sectional area of air hole 11 is reduced, allow gas flow be restricted and reduce; In addition; the gas of excess pressure is when flowing through pressure transmission pipe 2; because this pressure transmission pipe 2 is to adopt the rubber-like soft material to make; body itself has force variation performance preferably; and pipe thickness is very thin; be more prone to distortion; therefore when gases at high pressure are arranged; internal diameter of tube body increases; joint gap between pressure interface 1 and the pressure guiding pipe 31 is increased, allow gas be released a part, the actual like this pressure that passes to pressure-sensing device is greatly diminished; thereby protected pressure-sensing device, improved the whole anti-overload ability of gas pressure sensor.
The pressure interface of the gas pressure sensor of the foregoing description is connected on has 6kg/cm
2On the source of the gas of pressure, test, the gas pressure value of its sensitive element reaction is 0.6kg/cm
2If the anti-overload ability of this this sensitive element of explanation has only 0.6kg/cm
2, adding the overload protection arrangement of the utility model gas pressure sensor, the anti-overload ability of whole gas pressure sensor just can improve 10 times.Like this,, when gas pressure sensor is coupled with the higher pressurized air of pressure, just can avoid damaging gas pressure sensor, can reach design purpose if under the situation of careless or maloperation.
The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did.
Claims (8)
1. the overload protection arrangement of a gas pressure sensor comprises housing, is provided with pressure transmission part, pressure-sensing device part and circuit board in the housing; Pressure transmission partly is provided with pressure interface, and this interface one end passes housing for connecting source of the gas, and the other end and pressure-sensing device are partly connected, and are provided with air hole in the pressure interface; The pressure-sensing device part is connected with circuit board, and the pressure-sensing device part mainly comprises pressure guiding pipe and pressure-sensing device; It is characterized in that the pressure interface place of described pressure transmission part is provided with the Gas flow-limiting structure; Be provided with the pressure releasing structure between described pressure transmission part and the pressure-sensing device part.
2. the overload protection arrangement of gas pressure sensor according to claim 1 is characterized in that, described Gas flow-limiting structure is that the air hole internal fixation at pressure interface is provided with filamentous.
3. the overload protection arrangement of gas pressure sensor according to claim 1 is characterized in that, described filamentous is tinsel or plastics silk.
4. according to the overload protection arrangement of claim 2 or 3 described gas pressure sensors, it is characterized in that the difference of the external diameter of described filamentous and air hole internal diameter is 0.1mm to 0.3mm, the length of filamentous is less than or equal to the length of air hole.
5. the overload protection arrangement of gas pressure sensor according to claim 1; it is characterized in that; described pressure releasing structure is the pressure transmission pipe, and this pressure transmission Guan Yiduan is connected with the pressure interface of pressure transmission part, and the other end is connected with the pressure guiding pipe of pressure-sensing device part.
6. the overload protection arrangement of gas pressure sensor according to claim 5 is characterized in that, described pressure transmission tube wall thickness is 0.5mm to 3mm.
7. the overload protection arrangement of gas pressure sensor according to claim 5 is characterized in that, described pressure transmission pipe is made for the elasticity soft material.
8. the overload protection arrangement of gas pressure sensor according to claim 5 is characterized in that, described elasticity soft material is plastics or rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200967814U CN201060083Y (en) | 2007-07-16 | 2007-07-16 | Overload protection device of gas pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200967814U CN201060083Y (en) | 2007-07-16 | 2007-07-16 | Overload protection device of gas pressure sensor |
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| Publication Number | Publication Date |
|---|---|
| CN201060083Y true CN201060083Y (en) | 2008-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CNU2007200967814U Expired - Fee Related CN201060083Y (en) | 2007-07-16 | 2007-07-16 | Overload protection device of gas pressure sensor |
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| CN (1) | CN201060083Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426091A (en) * | 2011-10-13 | 2012-04-25 | 西北工业大学 | Protective device of dynamic pressure sensor used in wind tunnel air inlet experiment |
| CN102004011B (en) * | 2009-08-31 | 2012-09-05 | 环球水泥股份有限公司 | Pressure sensor and boxing machine using the same |
| CN104568298A (en) * | 2014-12-31 | 2015-04-29 | 西安远方航空技术发展总公司 | Pressure sensor |
| CN108302332A (en) * | 2018-01-31 | 2018-07-20 | 绵阳市维博电子有限责任公司 | A kind of micro- leak detection device of combustion gas |
| CN113155353A (en) * | 2021-04-02 | 2021-07-23 | 普力斯特测控技术(天长)有限公司 | Excessive protection connecting device of portable direct-mounted flange pressure sensor |
-
2007
- 2007-07-16 CN CNU2007200967814U patent/CN201060083Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102004011B (en) * | 2009-08-31 | 2012-09-05 | 环球水泥股份有限公司 | Pressure sensor and boxing machine using the same |
| CN102426091A (en) * | 2011-10-13 | 2012-04-25 | 西北工业大学 | Protective device of dynamic pressure sensor used in wind tunnel air inlet experiment |
| CN102426091B (en) * | 2011-10-13 | 2013-11-06 | 西北工业大学 | Protective device of dynamic pressure sensor used in wind tunnel air inlet experiment |
| CN104568298A (en) * | 2014-12-31 | 2015-04-29 | 西安远方航空技术发展总公司 | Pressure sensor |
| CN108302332A (en) * | 2018-01-31 | 2018-07-20 | 绵阳市维博电子有限责任公司 | A kind of micro- leak detection device of combustion gas |
| CN113155353A (en) * | 2021-04-02 | 2021-07-23 | 普力斯特测控技术(天长)有限公司 | Excessive protection connecting device of portable direct-mounted flange pressure sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080514 Termination date: 20100716 |