CN220871961U - Three-diaphragm differential pressure sensor type overload protection diaphragm - Google Patents
Three-diaphragm differential pressure sensor type overload protection diaphragm Download PDFInfo
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- CN220871961U CN220871961U CN202322826530.9U CN202322826530U CN220871961U CN 220871961 U CN220871961 U CN 220871961U CN 202322826530 U CN202322826530 U CN 202322826530U CN 220871961 U CN220871961 U CN 220871961U
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- cavity
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- 239000012528 membrane Substances 0.000 claims abstract description 33
- 229920002545 silicone oil Polymers 0.000 claims description 22
- 239000002184 metal Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 8
- 239000000741 silica gel Substances 0.000 abstract description 8
- 229910002027 silica gel Inorganic materials 0.000 abstract description 8
- 230000001105 regulatory effect Effects 0.000 abstract description 6
- 230000006872 improvement Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model relates to the technical field of three diaphragms, in particular to a three-diaphragm differential pressure sensor type overload protection diaphragm. Which includes a high pressure end corrugated diaphragm. According to the utility model, the high-pressure silica gel oil is input into the high-pressure end guide pipe and the low-pressure end guide pipe through the differential pressure sensor core body, so that the high-pressure silica gel oil is filled in the high-pressure cavity, the low-pressure silica gel oil is filled in the low-pressure cavity, the pressure in the high-pressure cavity and the low-pressure cavity is regulated by regulating the number and the thickness of the overload protection membrane bodies, when the differential pressure enables the volume generated by deformation of the overload protection membrane bodies to be equal to the volume of the gaps between the high-pressure end corrugated membrane bodies and the high-pressure cavity corrugated surfaces, the high-pressure end corrugated membrane bodies are not changed any more, the deformation of the overload protection membrane bodies is not changed any more, and the differential pressure value born by the differential pressure sensor core body is not increased any more, so that the sensor core body of the overload protection membrane bodies is subjected to overload protection.
Description
Technical Field
The utility model relates to the technical field of three diaphragms, in particular to a sensor type overload protection diaphragm of a three-diaphragm differential pressure sensor.
Background
Currently, a known three-diaphragm differential pressure sensor structure is formed by high-pressure end corrugated diaphragms, high-pressure cavities, overload protection diaphragm bodies, low-pressure cavities, low-pressure end diaphragms, guide pipes, differential pressure sensor cores and airtight silicone oil in the high-pressure and low-pressure cavities. The high-pressure end corrugated membrane of the high-pressure cavity is provided with corrugations identical to the corrugations of the corrugated membrane, gaps are reserved on the surfaces of the high-pressure end corrugated membrane and the corrugations of the high-pressure cavity, gaps are reserved on the surfaces of the low-pressure end corrugated membrane and the corrugations of the low-pressure cavity, pits are arranged on one side of the overload protection membrane body of the high-pressure cavity, and pits are also arranged on one side of the overload protection membrane body of the low-pressure cavity. The high pressure end is connected with the high pressure of the measured differential pressure, the low pressure end is connected with the low pressure of the measured differential pressure, the high pressure end corrugated diaphragm generates displacement under the action of the differential pressure, the gap between the high pressure end corrugated diaphragm and the corrugated surface of the high pressure cavity is reduced, the sealed silicone oil enables the overload protection diaphragm body to deform towards the low pressure cavity, at the moment, the gap between the corrugated surface of the low pressure end and the corrugated surface of the low pressure cavity is enlarged under the action of the silicone oil, when the pressure difference between the high pressure end and the low pressure end is the rated overload differential pressure value, the volume generated by deformation of the overload protection diaphragm body is just the volume of the gap between the corrugated surface of the high pressure end corrugated diaphragm and the corrugated surface of the high pressure cavity, the differential pressure value is increased, the pressure of the silicone oil in the sealed space of the high pressure end is not increased, and overload protection is realized for the differential pressure sensor.
However, the thickness of the overload protection diaphragm body determines the overload protection value of the differential pressure sensor, and for the serialized differential pressure values, the overload protection diaphragm bodies with different thicknesses are needed, so that the difficulty in realizing the overload protection of the three-diaphragm differential pressure sensor in engineering is increased, and the overload protection of various overload ranges can be conveniently realized for the combination of diaphragms with different thicknesses and numbers compared with a single diaphragm.
In view of this, the present utility model provides a three-diaphragm differential pressure sensor type overload protection diaphragm.
Disclosure of utility model
The utility model provides a three-diaphragm differential pressure sensor type overload protection diaphragm, which comprises a high-pressure end corrugated diaphragm, wherein a high-pressure cavity is fixedly welded on the outer wall of one side of the high-pressure end corrugated diaphragm, and an overload protection diaphragm body is fixedly welded on the outer wall of the other end of the high-pressure cavity;
the overload protection diaphragm comprises an overload protection diaphragm body, and is characterized in that a low-pressure cavity is fixedly welded on the outer wall of the other end of the overload protection diaphragm body, a low-pressure end corrugated diaphragm is fixedly welded on the outer wall of the other end of the low-pressure cavity, high-pressure cavity silicone oil is arranged in the high-pressure cavity, and low-pressure cavity silicone oil is arranged in the low-pressure cavity.
As a further improvement of the technical scheme, a high-pressure end guide pipe is fixedly communicated in the high-pressure cavity, a differential pressure sensor core body is fixedly communicated with the top of the high-pressure end guide pipe, and a high-pressure cavity is formed by the high-pressure end corrugated diaphragm, the high-pressure cavity, the high-pressure end guide pipe and the differential pressure sensor core body.
As a further improvement of the technical scheme, a low-pressure end guide pipe is fixedly communicated in the low-pressure cavity, a differential pressure sensor core body is fixedly communicated with the top of the low-pressure end guide pipe, and a low-pressure cavity is formed by the low-pressure end corrugated diaphragm, the low-pressure cavity, the low-pressure end guide pipe and the differential pressure sensor core body.
As a further improvement of the technical scheme, the overload protection membrane body consists of a plurality of circular metal membranes with the same diameter, and overload protection membrane bodies with different numbers and thicknesses are fixedly welded between the high-pressure cavity and the low-pressure cavity.
Compared with the prior art, the utility model has the beneficial effects that:
The high-pressure end guide pipe and the low-pressure end guide pipe are internally input with silica gel oil through the differential pressure sensor core body, so that the high-pressure cavity is internally filled with the high-pressure silica gel oil, the low-pressure cavity is internally filled with the low-pressure silica gel oil, the pressure inside the high-pressure cavity and the low-pressure cavity is regulated by regulating the quantity and the thickness of the overload protection membrane body, when the volume generated by deformation of the overload protection membrane body is equal to the volume of the gap between the high-pressure end corrugated membrane and the corrugated surface of the high-pressure cavity due to the differential pressure, the high-pressure end corrugated membrane is not changed any more, the deformation of the overload protection membrane body is not changed any more, and the differential pressure value received by the differential pressure sensor core body is not increased any more, so that the overload protection is performed on the sensor core body of the overload protection membrane body.
Drawings
The utility model is described in more detail below, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a three-diaphragm differential pressure sensor of the present utility model;
Fig. 2 is a schematic view of a longitudinal section of the protective film of the present utility model.
The meaning of each reference sign in the figure is: 1. high pressure end corrugated membrane; 2. a high pressure cavity; 3. high-pressure cavity silicone oil; 4. an overload protection membrane body; 5. low pressure cavity silicone oil; 6. a low pressure cavity; 7. a low pressure end corrugated diaphragm; 8. a low pressure end conduit; 9. a differential pressure sensor core; 10. a high pressure end conduit.
Detailed Description
As shown in fig. 1-2, the device comprises a high-pressure end corrugated diaphragm 1, wherein a high-pressure cavity 2 is fixedly welded on the outer wall of one side of the high-pressure end corrugated diaphragm 1, and an overload protection diaphragm body 4 is fixedly welded on the outer wall of the other end of the high-pressure cavity 2;
The outer wall of the other end of the overload protection membrane body 4 is fixedly welded with a low-pressure cavity 6, the outer wall of the other end of the low-pressure cavity 6 is fixedly welded with a low-pressure end corrugated membrane 7, high-pressure cavity silicone oil 3 is arranged in the high-pressure cavity 2, and low-pressure cavity silicone oil 5 is arranged in the low-pressure cavity 6;
In order to change the high-pressure end difference value conveniently, a high-pressure end guide pipe 10 is fixedly communicated in the high-pressure cavity 2, a differential pressure sensor core 9 is fixedly communicated at the top of the high-pressure end guide pipe 10, a high-pressure cavity is formed by the high-pressure end corrugated diaphragm 1, the high-pressure cavity 2, the high-pressure end guide pipe 10 and the differential pressure sensor core 9, the gap between the high-pressure end corrugated diaphragm 1 and the corrugated surface of the high-pressure cavity 2 is reduced through the pressure difference acting on the high-pressure end corrugated diaphragm 1 and the low-pressure end corrugated diaphragm 7, the overload protection diaphragm body 4 deforms towards the low-pressure cavity 6 through the high-pressure cavity silicone oil 3, the deformation value corresponds to the pressure difference between the high-pressure end and the low-pressure end, and meanwhile, the pressure of the high-pressure end is transmitted to the high-pressure end of the differential pressure sensor core 9;
In order to facilitate measurement of the low-pressure end difference value, a low-pressure end guide pipe 8 is fixedly communicated in the low-pressure cavity 6, a differential pressure sensor core 9 is fixedly communicated at the top of the low-pressure end guide pipe 8, a low-pressure cavity is formed by a low-pressure end corrugated membrane 7, the low-pressure cavity 6, the low-pressure end guide pipe 8 and the differential pressure sensor core 9, the gap between the corrugated surfaces of the low-pressure end corrugated membrane 7 and the low-pressure cavity 6 is enlarged through low-pressure cavity silicone oil 5, and meanwhile, the pressure of the low-pressure end is transmitted to the low-pressure end of the low-pressure sensor core, so that the differential pressure sensor core 9 can conveniently realize measurement of the pressure difference between the high-pressure end and the low-pressure end;
In order to conveniently measure various different data, therefore, the overload protection membrane body 4 consists of a plurality of circular metal membranes with the same diameter, the overload protection membrane body 4 with different numbers and thicknesses is fixedly welded between the high-pressure cavity 2 and the low-pressure cavity 6, and the overload protection values of different three-membrane differential pressure sensors are conveniently realized by setting the overload protection membrane body 4 into various combinations with different thicknesses and numbers.
The improvement of the embodiment is that: the high-pressure end conduit 10 and the low-pressure end conduit 8 are internally input with silica gel oil through the differential pressure sensor core 9, so that the high-pressure cavity 2 is internally filled with the high-pressure silica gel oil, the low-pressure cavity 6 is internally filled with the low-pressure cavity silicone oil 5, the gap between the corrugated surfaces of the high-pressure end corrugated diaphragm 1 and the low-pressure cavity 2 is reduced through the pressure difference acting on the high-pressure end corrugated diaphragm 1 and the low-pressure end corrugated diaphragm 7, the overload protection diaphragm body 4 deforms towards the low-pressure cavity 6 through the high-pressure cavity silicone oil 3, the deformation value corresponds to the pressure difference between the high-pressure end and the low-pressure end, the pressure of the high-pressure end is transmitted to the high-pressure end of the differential pressure sensor core 9, the gap between the corrugated surfaces of the low-pressure end corrugated diaphragm 7 and the low-pressure cavity 6 is enlarged through the low-pressure cavity silicone oil 5, and the pressure difference between the high-pressure end and the low-pressure end of the differential pressure sensor core 9 is conveniently measured;
to sum up, the working principle of the scheme is as follows:
The high-pressure end conduit 10 and the low-pressure end conduit 8 are internally input with silicone oil through the differential pressure sensor core 9, the high-pressure cavity 2 is filled with the high-pressure silicone oil, the low-pressure cavity 6 is filled with the low-pressure cavity silicone oil 5, the gap between the corrugated surfaces of the high-pressure end corrugated diaphragm 1 and the high-pressure cavity 2 is reduced through the pressure difference acting on the high-pressure end corrugated diaphragm 1 and the low-pressure end corrugated diaphragm 7, the overload protection diaphragm body 4 deforms towards the low-pressure cavity 6 through the high-pressure cavity silicone oil 3, the deformation value corresponds to the pressure difference between the high-pressure end and the low-pressure end, the pressure of the high-pressure end is transmitted to the high-pressure end of the differential pressure sensor core 9, the gap between the corrugated surfaces of the low-pressure end corrugated diaphragm 7 and the low-pressure cavity 6 is enlarged through the low-pressure cavity silicone oil 5, the pressure of the low-pressure end is transmitted to the low-pressure end of the low-pressure sensor core, the differential pressure sensor core 9 is convenient to measure the pressure difference between the high pressure end and the low pressure end, the overload protection value of the differential pressure sensor with different three diaphragms is convenient to realize by setting the overload protection diaphragm body 4 into various combinations of different thicknesses and numbers, the pressure inside the high pressure cavity 2 and the low pressure cavity 6 is regulated by regulating the number and the thickness of the overload protection diaphragm body 4, when the volume generated by deformation of the overload protection diaphragm body 4 is equal to the volume of the corrugated surface gap between the high pressure end corrugated diaphragm 1 and the high pressure cavity 2, the high pressure end corrugated diaphragm 1 is not changed any more, the deformation of the overload protection diaphragm body 4 is not changed any more, and the differential pressure value received by the differential pressure sensor core 9 is not increased any more, so that the sensor core of the overload protection diaphragm body 4 is overload protected.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present utility model, and are not intended to limit the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (4)
1. The three-diaphragm differential pressure sensor type overload protection diaphragm comprises a high-pressure end corrugated diaphragm (1), and is characterized in that: the outer wall of one side of the high-pressure end corrugated diaphragm (1) is fixedly welded with a high-pressure cavity (2), and the outer wall of the other end of the high-pressure cavity (2) is fixedly welded with an overload protection diaphragm body (4);
The overload protection diaphragm comprises an overload protection diaphragm body (4), and is characterized in that a low-pressure cavity (6) is fixedly welded on the outer wall of the other end of the overload protection diaphragm body (4), a low-pressure end corrugated diaphragm (7) is fixedly welded on the outer wall of the other end of the low-pressure cavity (6), high-pressure cavity silicone oil (3) is arranged inside the high-pressure cavity (2), and low-pressure cavity silicone oil (5) is arranged inside the low-pressure cavity (6).
2. The three-diaphragm differential pressure sensor-based overload protection diaphragm of claim 1, wherein: the high-pressure cavity (2) is internally fixedly communicated with a high-pressure end guide pipe (10), the top of the high-pressure end guide pipe (10) is fixedly communicated with a differential pressure sensor core body (9), and the high-pressure end corrugated diaphragm (1) and the high-pressure cavity (2) form a high-pressure cavity with the high-pressure end guide pipe (10) and the differential pressure sensor core body (9).
3. The three-diaphragm differential pressure sensor-based overload protection diaphragm of claim 1, wherein: the low-pressure cavity (6) is internally fixedly communicated with a low-pressure end guide pipe (8), the top of the low-pressure end guide pipe (8) is fixedly communicated with a differential pressure sensor core body (9), and the low-pressure end corrugated membrane (7) and the low-pressure cavity (6) as well as the low-pressure end guide pipe (8) and the differential pressure sensor core body (9) form a low-pressure cavity.
4. The three-diaphragm differential pressure sensor-based overload protection diaphragm of claim 1, wherein: the overload protection film body (4) is composed of a plurality of circular metal films with the same diameter, and the overload protection film body (4) with different numbers and thicknesses is fixedly welded between the high-pressure cavity (2) and the low-pressure cavity (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322826530.9U CN220871961U (en) | 2023-10-20 | 2023-10-20 | Three-diaphragm differential pressure sensor type overload protection diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322826530.9U CN220871961U (en) | 2023-10-20 | 2023-10-20 | Three-diaphragm differential pressure sensor type overload protection diaphragm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220871961U true CN220871961U (en) | 2024-04-30 |
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ID=90815626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322826530.9U Active CN220871961U (en) | 2023-10-20 | 2023-10-20 | Three-diaphragm differential pressure sensor type overload protection diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220871961U (en) |
-
2023
- 2023-10-20 CN CN202322826530.9U patent/CN220871961U/en active Active
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