CN202770577U - Isolation encapsulation type super high pressure sensing element - Google Patents
Isolation encapsulation type super high pressure sensing element Download PDFInfo
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- CN202770577U CN202770577U CN 201220200424 CN201220200424U CN202770577U CN 202770577 U CN202770577 U CN 202770577U CN 201220200424 CN201220200424 CN 201220200424 CN 201220200424 U CN201220200424 U CN 201220200424U CN 202770577 U CN202770577 U CN 202770577U
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- sensing element
- sensing
- hyperpressure
- insulation package
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Abstract
The utility model relates to a pressure sensing element, which belongs to the technical field of super high pressure detection. The isolation encapsulation type super high pressure sensing element is characterized by comprising a sealing cover with a lead cone, and a sensing component arranged below the lead cone and composed of a component frame and a metal wire wound on the component frame and used for sensing and conducting, wherein the metal wire is simultaneously welded on the lead cone, the lead cone and the sensing component are arranged in a sealing cavity which is formed by a sealing cover and a sealing body connected with the sealing cover, the sealing cavity is filled with white gas, the sealing body comprises a multi-segment shell, and the multi-segment shell comprises a corrugated pipe segment shell. The improved pressure transmission medium and structure are used, thus the sensing element normally works at the super high pressure and moreover the smoothness and precision of detection are ensured.
Description
Technical field
The utility model relates to a kind of pressure sensor, relates in particular to a kind of insulation package formula hyperpressure sensing element.
Background technology
Piston manometer is the pressure measurement instrument of pin-point accuracy high stability, generally is used as National primary standard and, second-class measurement standard.Piston manometer is the surveying instrument that comes the unknown static pressure of balance by being carried in known counterbalance mass on the known useful area, when in case static pressure changes, need to regulate timely the counterweight that loads and come balance could determine the static pressure value, therefore need an of short duration equilibrium process for measuring unknown static pressure.Be the variation of Real-Time Monitoring static pressure, the instrument that can directly measure and show unknown static pressure need to be arranged.At present, under conventional pressure, a lot of pressure transducers, pressure unit and digital pressure recorder have been developed.Wherein, the pressure measurement structure with sensing element and silicone oil usefulness diaphragm insulation package is arranged, its diaphragm is by welding sensing element and silicone oil to be encapsulated in the volume, and its structure as shown in Figure 1.
The insulation package load cell of this kind structure is very ripe at present, and is widely used, and its principle is that tested pressure-acting is in diaphragm, pass to silicone oil by diaphragm, behind the silicone oil pressurized, the isotropic stressed by liquid passes to sensing element, by sensing element output measuring-signal.But under hyperpressure, the generic media such as silicone oil can not be as pressure measurement encapsulation oil, because under hyperpressure, these media can crystallizations, can not isotropic transmission by measuring pressure.
In addition, also have directly sensing element is placed by the liquid pressure transmitting medium of measuring pressure, then by electric conductor sensor output signal is drawn compression volume, by the instrument measurement output signal, be converted into again force value and show.The electric conductor of this sensor directly contacts with used pressure transmitting medium, and the electric conductivity of pressure transmitting medium is influential to the insulation effect of electric conductor, and the bypass effect when producing signal measurement easily causes very large systematic error to measurement result.Its structure as shown in Figure 2.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of insulation package formula hyperpressure sensing element, solves present sensing element and can't work or produce the large defective of systematic error under hyperpressure.Technical scheme
A kind of insulation package formula hyperpressure sensing element, it is characterized in that: the gland bonnet that is provided with the lead-in wire cone in the middle of comprising, lead-in wire cone below is provided with the sensing member, described sensing member comprises member skeleton and is wrapped in the sensing on the member skeleton and conducts the tinsel of usefulness, described tinsel is welded on the lead-in wire cone simultaneously, described lead-in wire cone is connected the annular seal space that is comprised of gland bonnet and the seal that is connected with gland bonnet with the sensing member, be full of white gas in the annular seal space, described seal comprises the multistage housing, comprising the bellows piece housing.
The member skeleton of described sensing member is right cylinder, is provided with spiral groove on the member skeleton outer ring, and described tinsel is fixed in the described spiral groove.
Described tinsel is selected manganese-copper filament, and described member skeleton adopts aluminium alloy to make, and by dense anodic oxide, forms the aluminum oxide film rete of one deck densification on the skeleton surface.
Described seal comprises three part housing, is respectively the stainless steel sleeve pipeline section that is fixedly connected with gland bonnet, the bellows piece that is welded and fixed with the stainless steel sleeve pipeline section, the tail nozzle belt that is welded and fixed with bellows piece.
Be provided with end socket in the described tail nozzle belt.
Described lead-in wire cone is provided with two, in the middle of two lead-in wire cones the sensing member is set, and described sensing member is fixed by being sleeved on two outer bracing frames of lead-in wire cone.
Described lead-in wire cone adopts beryllium-bronze material to make.
Beneficial effect
Insulation package formula hyperpressure sensing element of the present utility model adopts white gas as pressure transmitting medium, and it under high pressure has extraordinary insulativity, can not cause the bypass effect when pressure drag is measured under the hyperpressure, can not produce systematic error to measuring pressure of sensor; And under hyperpressure, white gas can crystallization, therefore can isotropic transmission of pressure, seal adopts the part corrugated tube to compensate the volume shrinkage mass that pressure transmitting medium produces under the hyperpressure effect, thereby solved can't detect under the hyperpressure and error large, the problem that precision is low is by improved pressure transmitting medium and structural change, sensing element is worked under hyperpressure, and can guarantee the smooth and precision of detection.
Description of drawings
Fig. 1 is the normal pressure working sensor schematic diagram of the utility model prior art;
Fig. 2 is the direct pressurized working sensor schematic diagram of prior art;
Fig. 3 is the utility model structural drawing;
Wherein: 1-gland bonnet, the 2-cone that goes between, 3-bracing frame, 4-sensing member, 5-stainless steel sleeve pipe, 6-corrugated tube, the 7-end socket, the 8-tail is taken over, the 9-pressure-sensing device, 10-silicone oil, 11-isolation diaphragm, 12-pressure transducer sheet, the 13-glass pedestal, 14-pressure ingress pipe, 15-is used for the pin that printed board is installed, A-reference edge pressure, B-is by measuring pressure.
Embodiment
Below in conjunction with specific embodiments and the drawings, further set forth the utility model.
For present defective, design a kind of insulation package formula hyperpressure sensing element that can under hyperpressure, work and guarantee precision, as shown in Figure 3, be provided with the gland bonnet 1 of lead-in wire cone 2 in the middle of comprising, lead-in wire cone 2 belows are provided with sensing member 4, described sensing member 4 comprises member skeleton and is wrapped in the sensing on the member skeleton and conducts the tinsel of usefulness, described tinsel is welded on the lead-in wire cone 2 simultaneously, described lead-in wire cone 2 is connected with the sensing member and is positioned at the annular seal space that is comprised of gland bonnet 1 and the seal that is connected with gland bonnet 1, be full of white gas in the annular seal space, described seal comprises the multistage housing, comprising the bellows piece housing.
Described tinsel adopts manganese-copper filament as pressure drag component, shown in the accompanying drawing 34, with the thin diameter spring of manganese-copper filament coiled, and then be entangled on the member skeleton of spiral groove, this member skeleton adopts aluminium alloy to make, and by dense anodic oxide, at member skeleton surface and the surperficial aluminum oxide film rete that forms one deck densification of groove, improve the insulativity of member skeleton, form the sensing member with this.Bracing frame 3 supports the formation sensing part with member 4 and lead-in wire cone 2, and lead-in wire cone 2 is the electrode of sensing member 4.Lead-in wire cone 2 is provided with two, in the middle of two lead-in wire cones 2 sensing member 4 is set, and described sensing member 4 is fixed by being sleeved on two lead-in wire cone 2 outer bracing frames 3, and manganese-copper filament adopts scolding tin to be welded on the lead-in wire cone 2.
The multistage housing of described seal is for adopting stainless steel sleeve pipe 5, corrugated tube 6, take over 8 and form, and gland bonnet 1 gets up the sensing part insulation package together, has been full of white gas in the annular seal space.Stainless steel sleeve pipe 5, adapter 8 and corrugated tube 6 are by the roll welding welded seal, and stainless steel sleeve pipe 5 passes through the Laser Welding (LBW) welded seal with gland bonnet 1, and end socket 7 is taken on 8 by being screwed at, and whole sensing part and pressure transmitting medium are sealed.White gas is as pressure transmitting medium, and it under high pressure has extraordinary insulativity, can not cause the bypass effect when pressure drag is measured under the hyperpressure, can not produce systematic error to measuring pressure of sensor; And under hyperpressure, white gas can crystallization, therefore can isotropic transmission of pressure.Corrugated tube mainly is the volume shrinkage mass that the compensation pressure transmitting medium produces under the hyperpressure effect.
Gland bonnet 1 has adopted the self sealss form, and gland bonnet 1 is comprised of wire holder pedestal, lead-in wire cone 2 and sealed insulation layer as the wire holder of actual sensing element.The interior taper hole of lead-in wire cone 2 and pedestal cooperates, the centre accompanies the insulated enclosure layer, this pedestal has very high intensity and toughness, can pressure break and brittle failure under the hyperpressure effect, in addition, this base structure is under the high pressure effect, taper hole shrinks, make to connect closelyr between pedestal and the lead-in wire cone 2, lead-in wire cone 2 and insulation course can not move in taper hole under the hyperpressure effect, therefore are conducive to the hyperpressure sealing; Beryllium-bronze lead-in wire cone 2 has extraordinary electric conductivity, and the thermoelectrical potential between the copper-manganese is very little, is very rational electrode material; The sealed insulation layer under high pressure can phase transformation, still has extraordinary insulativity and sealing, adopt mica sheet, aluminum oxide film and pyrophillite all can, this insulation course also has extraordinary resistance to elevated temperatures.
Insulation package formula hyperpressure sensing element of the present utility model adopts white gas as pressure transmitting medium, can not cause the bypass effect when pressure drag is measured under the hyperpressure, can not produce systematic error to measuring pressure of sensor; And under hyperpressure, white gas can crystallization, therefore can isotropic transmission of pressure, seal adopts the part corrugated tube to compensate the volume shrinkage mass that pressure transmitting medium produces under the hyperpressure effect, thereby solved can't detect under the hyperpressure and error large, the problem that precision is low, by improved pressure transmitting medium and structural change, sensing element is worked under hyperpressure, and can guarantee to detect smoothly and precision, and each several part structure of the present utility model all can reach and more press more closely effect under hyperpressure, Stability Analysis of Structures does not affect measuring accuracy.
Claims (7)
1. insulation package formula hyperpressure sensing element, it is characterized in that: the gland bonnet that is provided with the lead-in wire cone in the middle of comprising, lead-in wire cone below is provided with the sensing member, described sensing member comprises member skeleton and is wrapped in the sensing on the member skeleton and conducts the tinsel of usefulness, described tinsel is welded on the lead-in wire cone simultaneously, described lead-in wire cone is connected the annular seal space that is comprised of gland bonnet and the seal that is connected with gland bonnet with the sensing member, be full of white gas in the annular seal space, described seal comprises the multistage housing, comprising the bellows piece housing.
2. insulation package formula hyperpressure sensing element as claimed in claim 1, it is characterized in that: the member skeleton of described sensing member is right cylinder, is provided with spiral groove on the member skeleton outer ring, described tinsel is fixed in the described spiral groove.
3. insulation package formula hyperpressure sensing element as claimed in claim 1 or 2, it is characterized in that: described tinsel is selected manganese-copper filament, described member skeleton adopts aluminium alloy to make, and by dense anodic oxide, forms the aluminum oxide film rete of one deck densification on the skeleton surface.
4. insulation package formula hyperpressure sensing element as claimed in claim 1, it is characterized in that: described seal comprises three part housing, be respectively the stainless steel sleeve pipeline section that is fixedly connected with gland bonnet, the bellows piece that is welded and fixed with the stainless steel sleeve pipeline section, the tail nozzle belt that is welded and fixed with bellows piece.
5. insulation package formula hyperpressure sensing element as claimed in claim 4 is characterized in that: be provided with end socket in the described tail nozzle belt.
6. insulation package formula hyperpressure sensing element as claimed in claim 1, it is characterized in that: described lead-in wire cone is provided with two, in the middle of two lead-in wire cones the sensing member is set, described sensing member is fixed by being sleeved on two outer bracing frames of lead-in wire cone.
7. insulation package formula hyperpressure sensing element as claimed in claim 1 is characterized in that: the making of described lead-in wire cone employing beryllium-bronze material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220200424 CN202770577U (en) | 2012-05-05 | 2012-05-05 | Isolation encapsulation type super high pressure sensing element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220200424 CN202770577U (en) | 2012-05-05 | 2012-05-05 | Isolation encapsulation type super high pressure sensing element |
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| Publication Number | Publication Date |
|---|---|
| CN202770577U true CN202770577U (en) | 2013-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220200424 Expired - Fee Related CN202770577U (en) | 2012-05-05 | 2012-05-05 | Isolation encapsulation type super high pressure sensing element |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107677396A (en) * | 2017-11-06 | 2018-02-09 | 嘉兴御创电力科技有限公司 | A kind of insulation package formula sensing element |
-
2012
- 2012-05-05 CN CN 201220200424 patent/CN202770577U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107677396A (en) * | 2017-11-06 | 2018-02-09 | 嘉兴御创电力科技有限公司 | A kind of insulation package formula sensing element |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130306 Termination date: 20190505 |
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| CF01 | Termination of patent right due to non-payment of annual fee |