CN2767982Y - Differential pressure sensor - Google Patents
Differential pressure sensor Download PDFInfo
- Publication number
- CN2767982Y CN2767982Y CN 200420085674 CN200420085674U CN2767982Y CN 2767982 Y CN2767982 Y CN 2767982Y CN 200420085674 CN200420085674 CN 200420085674 CN 200420085674 U CN200420085674 U CN 200420085674U CN 2767982 Y CN2767982 Y CN 2767982Y
- Authority
- CN
- China
- Prior art keywords
- drain pan
- corrugated pipe
- corrugated tube
- oil
- end cap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
The utility model relates to a differential pressure sensor which comprises a bottom shell, an end cap fixedly connected with the bottom shell, a corrugated pipe, and a contact and an insulating mat which are arranged on the corrugated pipe, and an adjusting spring, wherein an insulated sealing ring is arranged on a raising shoulder of the bottom shell, a corrugated pipe sealing combined sleeve is arranged in the end cap, the lower end face of the corrugated pipe sealing combined sleeve is fixed to the bottom shell, the adjusting screw is arranged in centre hole of the end cap, an oil inlet hole communicated with an outer cavity of the corrugated pipe is also arranged on the bottom shell, and an inner cavity of the corrugated pipe and the corrugated pipe sealing combined sleeve communicated with the outer cavity of the corrugated pipe respectively form two sealing oil cavities P1 and P2. The utility model has the advantage of reasonable structural design and overcomes the defects of poor precision, instable quality, short service life, etc. existing in the existing fluid pressure sensor. In addition, the differential pressure sensor is installed in an oil passage for connecting a filter and an engine so as to alarm in time on the occasion of low oil pressure caused by the blockage of the filter, solve the problem of burning out the engine due to undersize oil pressure difference and extend the service life of the engine of an automobile.
Description
Technical field
The utility model belongs to automobile-used pressure transducer technical field, particularly relates to a kind of rational in infrastructure, differential pressure pick-up that is used for measured automobiles engine motor oil pressure that sensing accuracy is high.
Background technology
The fluid pressure sensor of measuring oil pressure all is installed in the oil circuit between present known automotive oil tank and the filtrator, such pressure transducer generally can only detect the pressure reduction of fuel tank to oil pressure between the filtrator, and filtrator connects in the oil circuit of engine because the device that detects oil pressure is not installed, tend to occur the low excessively problem of plugged filter oil pressure, thereby cause engine to burn, bring great loss to the user.Existing in addition fluid pressure sensor is as seal and sensing element, the film that adopts rubber and chemical material to make is arranged, but continuous development and variation along with its technology, the corrugated tube that adopts metal material is also arranged, the former exist defectives such as low precision, quality instability and serviceable life is short its, though the latter solves and overcome the former existing deficiency, its complex structure, be not easy to operation, so be not suitable in motor car engine and the oil circuit that filtrator is connected on structured material.
Summary of the invention
The utility model provides a kind of rational in infrastructure, differential pressure pick-up that is used for measured automobiles engine motor oil pressure that sensing accuracy is high for solving the technical matters that exists in the known technology.
The technical scheme that the utility model is taked for the technical matters that exists in the solution known technology is:
Differential pressure pick-up, comprise: drain pan, the end cap affixed with drain pan, with the fixing corrugated tube of drain pan center pit, be provided with contact and insulating mat in the corrugated tube upper surface, adjusting spring is installed on the contact, it is characterized in that: on the half the circumference of the sleeve where it joins the shoulder of drain pan, be provided with the insulated enclosure circle, in end cap, be provided with sylphon seal combination cover, its lower surface and drain pan are fixed, put in sylphon seal combination adjusting pad is installed, the adjustment screw is equipped with at the end cap central bore place, on drain pan, also be provided with the oil supply hole that communicates with the corrugated tube exocoel, constitute two seal oil chamber P1 and P2 respectively by corrugated tube inner chamber and the sylphon seal that is communicated with corrugated tube exocoel combination cover, the drain pan center pit communicates with the corrugated tube inner chamber, and the drain pan oil supply hole is communicated with corrugated tube exocoel and sylphon seal combination cover.Corrugated tube plays the effect that promotes the contact, and protects the oil in its P1 chamber not leak simultaneously; Sylphon seal combination cover is adjusted spring and is moved up and down and protect the oil in its P2 chamber not leak.
The utility model can also adopt following technical measures:
The lower surface of described drain pan is provided with the groove that is used to connect.
Sylphon seal combination cover adopts metal material to make.
Advantage and the good effect that the utlity model has are: because the utility model reasonable in design, sylphon seal combination cover adopts metal material to make, overcome the film that existing fluid pressure sensor adopts rubber and chemical material to make as seal and sensing element, and the low precision that causes, defectives such as quality instability and serviceable life are short, in addition this differential pressure pick-up is installed in the oil circuit of filtrator connection engine, and control the oil pressure of two oil circuits by two annular seal spaces that corrugated tube inner chamber and the sylphon seal that is communicated with corrugated tube exocoel combination cover form, can make and take place in the oil circuit of filtrator access to engine in time to report to the police when oil pressure pressure reduction changes, solved plugged filter, oil pressure is low excessively, and the problem that causes burning out engine occurs, and has prolonged the serviceable life of motor car engine.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present utility model;
Among the figure: 1 drain pan, 2 corrugated tubes, 3 contacts, 4 insulating mats, 5 are adjusted spring, 6 insulated enclosure circles, 7 sylphon seals combination cover, 8 adjusting pads, 9 end caps, 10 adjustment screws, 11 oil supply holes.
Embodiment
For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
See also Fig. 1, differential pressure pick-up comprises: drain pan 1, end cap 9 with the drain pan riveted joint, with the fixing corrugated tube 2 of drain pan center pit, be welded with contact 3 and insulating mat 4 in the corrugated tube upper surface, adjusting spring 5 is installed on the contact 3, on the half the circumference of the sleeve where it joins the shoulder of drain pan 1, be provided with insulated enclosure circle 6, in end cap 9, be provided with sylphon seal combination cover 7, sylphon seal combination cover adopts metal material to make, its lower surface and drain pan 1 welding are fixing, put in sylphon seal combination adjusting pad 8 is installed, be equipped with and adjust screw 10 at the end cap central bore place, on drain pan, also be provided with the oil supply hole 11 that communicates with corrugated tube 2 exocoels, constitute two seal oil chamber P1 and P2 respectively by corrugated tube inner chamber and the sylphon seal that is communicated with corrugated tube exocoel combination cover, the drain pan center pit communicates with the corrugated tube inner chamber, and the drain pan oil supply hole is communicated with corrugated tube exocoel and sylphon seal combination cover.Corrugated tube plays the effect that promotes the contact, and protects the oil in its P1 chamber not leak simultaneously; Sylphon seal combination cover is adjusted spring and is moved up and down and protect the oil in its P2 chamber not leak.The lower surface of drain pan 1 is provided with the groove that is used to connect.
Principle of work of the present utility model is described below:
When the oil of fuel tank when drain pan 1 center pit enters the inner chamber P1 of corrugated tube 2, the oil that comes out from filtrator overlaps the 8 P2 chambeies that form by exocoel and sylphon seal combination that drain pan oil supply hole 11 enters into corrugated tube 2, when the oil pressure in two chambeies is in equilibrium state, contact 3, corrugated tube upper surface is under the pressure effect of spring, break away from sylphon seal combination cover 8, in case plugged filter, when the oil pressure in the P2 chamber that corrugated tube 2 exocoels and sylphon seal combination cover 7 form is lower than the oil pressure of corrugated tube P1 inner chamber and reaches the force value of adjusting the spring adjustment, under the effect of pressure reduction, corrugated tube 2 withstands contact 3 and moves up and promote sylphon seal combination cover 7, at this moment the two poles of the earth contact that separates by insulated enclosure circle 6, it is drain pan 1, corrugated tube 2 and contact 3 are an electrode, sylphon seal combination cover 7, adjusting pad 8 and adjustment screw 10 constitute another electrodes, thereby realize the differential pressure warning.
Claims (3)
1. differential pressure pick-up, comprise: drain pan, the end cap affixed with drain pan, with the fixing corrugated tube of drain pan center pit, be provided with contact and insulating mat in the corrugated tube upper surface, adjusting spring is installed on the contact, it is characterized in that: on the half the circumference of the sleeve where it joins the shoulder of drain pan, be provided with the insulated enclosure circle, in end cap, be provided with sylphon seal combination cover, sylphon seal combination cover lower surface and drain pan are fixed, put in sylphon seal combination adjusting pad is installed, the adjustment screw is equipped with at the end cap central bore place, on drain pan, also be provided with the oil supply hole that communicates with the corrugated tube exocoel, constitute two seal oil chamber P1 and P2 respectively by corrugated tube inner chamber and the sylphon seal that is communicated with corrugated tube exocoel combination cover, the drain pan center pit communicates with the corrugated tube inner chamber, and the drain pan oil supply hole is communicated with corrugated tube exocoel and sylphon seal combination cover.
2. differential pressure pick-up according to claim 1 is characterized in that: the lower surface of drain pan is provided with the groove that is used to connect.
3. differential pressure pick-up according to claim 1 is characterized in that: sylphon seal combination cover adopts metal material to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420085674 CN2767982Y (en) | 2004-11-30 | 2004-11-30 | Differential pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420085674 CN2767982Y (en) | 2004-11-30 | 2004-11-30 | Differential pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2767982Y true CN2767982Y (en) | 2006-03-29 |
Family
ID=36681850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420085674 Expired - Fee Related CN2767982Y (en) | 2004-11-30 | 2004-11-30 | Differential pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2767982Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100587436C (en) * | 2008-05-06 | 2010-02-03 | 中国人民解放军军事医学科学院卫生装备研究所 | Overpressure and negative-pressure protecting device monitoring and alarm system |
-
2004
- 2004-11-30 CN CN 200420085674 patent/CN2767982Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100587436C (en) * | 2008-05-06 | 2010-02-03 | 中国人民解放军军事医学科学院卫生装备研究所 | Overpressure and negative-pressure protecting device monitoring and alarm system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |