CN220018804U - Leakage-proof pressure sensor - Google Patents
Leakage-proof pressure sensor Download PDFInfo
- Publication number
- CN220018804U CN220018804U CN202321618621.7U CN202321618621U CN220018804U CN 220018804 U CN220018804 U CN 220018804U CN 202321618621 U CN202321618621 U CN 202321618621U CN 220018804 U CN220018804 U CN 220018804U
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- CN
- China
- Prior art keywords
- pressure sensor
- mounting cavity
- air guide
- guide channel
- fitting
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Links
- 238000009434 installation Methods 0.000 claims description 14
- 238000001514 detection method Methods 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model relates to the technical field of pressure sensors and discloses a leakage-proof pressure sensor, which comprises a base, wherein the top of the base is provided with a mounting cavity, the bottom of the mounting cavity is provided with a first air guide channel, the bottom of the mounting cavity is provided with a fitting, the fitting is internally provided with a second air guide channel, the second air guide channel is communicated with the first air guide channel, one end of the second air guide channel is provided with a pressure sensor chip and a circuit board, pins of the pressure sensor chip are connected to the circuit board through wires, the contact surface of the fitting and the mounting cavity is provided with an O-shaped ring, and the mounting cavity is internally provided with a limiting piece for reducing the pressure of the fitting and the mounting cavity; when the pressure sensor is used, the assembly part is arranged in the mounting cavity, the O-shaped ring is arranged on the contact surface of the assembly part and the mounting cavity, and the pressure sensor chip is arranged on the top of the assembly part, so that stress can be prevented from being transmitted to the pressure sensor chip when the O-shaped ring is assembled, and the detection precision of the pressure sensor is ensured.
Description
Technical Field
The utility model relates to the technical field of pressure sensors, in particular to a leakage-proof pressure sensor.
Background
In the fields of flow detection, presses, compressors, air conditioning and refrigerating equipment, respirators and the like, pressure sensors are often used for pressure detection. When the pressure sensor is used, the tightness of the pressure is critical to the detection result. At present, an O-shaped sealing ring is mostly used for sealing assembly, such as an oil-filled core pressure sensor with a side wall seal and a ceramic pressure sensor with an end face seal.
For the oil filling core body and the ceramic pressure sensor, the O-shaped ring can directly act on the main body part during assembly, and the assembly stress is directly transmitted to the pressure chip, so that the performance precision of the product is affected. In addition, when the pressure sensor is influenced by the medium-high pressure and the environment in the application process, the sealing area of the O-shaped ring can gradually generate micro leakage, so that the function of a product is influenced, and the service life of the product is reduced.
Disclosure of Invention
In view of the shortcomings of the background technology, the utility model provides a leakage-proof pressure sensor, and aims to solve the technical problem that the assembly stress generated during the assembly of an O-shaped ring in the existing pressure sensor is transmitted to a pressure chip, so that the performance accuracy of a product is affected.
In order to solve the technical problems, the utility model provides the following technical scheme: the utility model provides a leak protection pressure sensor, includes the base, the installation cavity has been seted up at the top of base, first air guide channel has been seted up to the bottom of installation cavity, first air guide channel extends to the bottom of base, the assembly part is installed to the bottom of installation cavity, be equipped with second air guide channel in the assembly part, second air guide channel with first air guide channel intercommunication, second air guide channel deviates from first air guide channel's one end installs pressure sensor chip and circuit board, the pin of pressure sensor chip is inserted on the circuit board through the wire, the assembly part with be equipped with O type circle on the contact surface of installation cavity, the installation intracavity still be equipped with be used for with the assembly part pressure drop with locating part in the installation cavity.
In some embodiments, the fitting includes a body and a boss on the body, the second air guide channel extending from a bottom surface of the body onto the boss, the pressure sensor chip and the circuit board being mounted on a top surface of the boss.
In one embodiment, the raised portion has a T-shaped vertical cross-section.
In a certain embodiment, the mounting cavity comprises an upper mounting cavity and a lower mounting cavity, the lower mounting cavity is matched with the body, the body is positioned in the lower mounting cavity, the limiting piece is mounted in the upper mounting cavity, and the bottom of the limiting piece abuts against the body.
In certain embodiments, the stop is threaded onto the inner arm of the upper mounting cavity.
In one embodiment, the fitting has at least two O-rings on its contact surface with the mounting cavity.
In one embodiment, two O-rings are provided between the bottom of the fitting and the bottom of the mounting cavity.
In one embodiment, an O-ring is disposed between the bottom of the fitting and the bottom of the mounting cavity, and an O-ring is disposed between the side wall of the fitting and the side wall of the mounting cavity.
Compared with the prior art, the utility model has the following beneficial effects: according to the utility model, the assembly part is arranged in the mounting cavity, the O-shaped ring is arranged on the contact surface of the assembly part and the mounting cavity, and the pressure sensor chip is arranged at the top of the assembly part, so that stress can be prevented from being transmitted to the pressure sensor chip when the O-shaped ring is assembled, and the detection precision of the utility model is ensured.
Drawings
FIG. 1 is a block diagram of a first embodiment of the present utility model;
FIG. 2 is an internal cross-sectional view of the fitting, pressure sensor chip of FIG. 1;
fig. 3 is a structural diagram of a second embodiment of the present utility model.
In the figure: 1. the device comprises a base, 2, a mounting cavity, 3, a first air guide channel, 4, an assembly part, 5, a second air guide channel, 6, an O-shaped ring, 7, a pressure sensor chip, 8, a circuit board, 9, a limiting piece, 10, a chamfer, 40, a body, 41 and a protruding part.
Detailed Description
The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.
Example 1
As shown in fig. 1-2, a leakage-proof pressure sensor comprises a base 1, wherein a mounting cavity 2 is formed in the top of the base 1, a first air guide channel 3 is formed in the bottom of the mounting cavity 2, the first air guide channel 3 extends to the bottom of the base 1, a fitting part 4 is mounted at the bottom of the mounting cavity 2, a second air guide channel 5 is arranged in the fitting part 4, the second air guide channel 5 is communicated with the first air guide channel 3, a pressure sensor chip 7 and a circuit board 8 are mounted at one end, deviating from the first air guide channel 3, of the second air guide channel 5, pins of the pressure sensor chip 7 are connected onto the circuit board 8 through wires, an O-shaped ring 6 is arranged on the contact surface of the fitting part 4 and the mounting cavity 2, and a limiting part 9 for reducing pressure of the fitting part 4 and the mounting cavity 2 is further arranged in the mounting cavity 2.
Specifically, in the present embodiment, an O-ring 6 is provided between the bottom of the fitting 4 and the bottom of the installation cavity 2, and an O-ring 6 is provided between the side wall of the fitting 4 and the side wall of the installation cavity 3. In actual use, the leakage prevention capability of the present utility model can be enhanced by the two O-rings 6.
In addition, as shown in fig. 2, the fitting 4 includes a body 40 and a boss 41 provided on the body, the boss 41 having a T-shaped vertical section, the second air guide passage 5 extending from the bottom surface of the body 40 to the boss 41, and the pressure sensor chip 7 and the circuit board 8 being mounted on the top surface of the boss 41.
In this embodiment, the mounting cavity 2 includes an upper mounting cavity and a lower mounting cavity, the lower mounting cavity is matched with the body 40, the body 40 is located in the lower mounting cavity, the limiting member 9 is mounted in the upper mounting cavity, and the bottom of the limiting member 9 abuts against the body 40. It should be noted that although the upper and lower mounting cavities are not labeled in fig. 1, the positions of the upper and lower mounting cavities may be known depending on the positions of the body 40 and the stopper 9.
Specifically, in this embodiment, the stopper 9 is screwed to the inner arm of the upper mounting chamber.
In a certain embodiment, M O-rings are arranged on the contact surface of the fitting 4 with the mounting cavity 2, and M is a positive integer greater than 2.
For the utility model, by arranging the fitting 4 in the mounting cavity 2, arranging the O-shaped ring 6 on the contact surface of the fitting 4 and the mounting cavity 2 and arranging the pressure sensor chip 7 on the top of the fitting 4, stress can be prevented from being transmitted to the pressure sensor chip 7 when the O-shaped ring 6 is assembled, so that the detection precision of the utility model is ensured; the leakage prevention capability of the present utility model can be enhanced by providing two O-rings 6.
Example two
The structure of the pressure sensor of the present embodiment is shown in fig. 3, and in contrast to fig. 1, two O-rings 6 are provided between the bottom of the fitting 4 and the bottom of the mounting chamber 2 in the present embodiment. In addition, the top and bottom of the body 40 are respectively provided with a chamfer 10, and the chamfer 10 facilitates the placement of the body 40 into the lower mounting cavity.
The present utility model has been made in view of the above-described circumstances, and it is an object of the present utility model to provide a portable electronic device capable of performing various changes and modifications without departing from the scope of the technical spirit of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.
Claims (8)
1. The utility model provides a leak protection pressure sensor, its characterized in that, includes the base, the installation cavity has been seted up at the top of base, first air guide channel has been seted up to the bottom of installation cavity, first air guide channel extends to the bottom of base, the assembly part is installed to the bottom of installation cavity, be equipped with the second air guide channel in the assembly part, the second air guide channel with first air guide channel intercommunication, the second air guide channel deviates from the one end of first air guide channel installs pressure sensor chip and circuit board, the pin of pressure sensor chip is passed through the wire and is inserted on the circuit board, the assembly part with be equipped with O type circle on the contact surface of installation cavity, the installation intracavity still be equipped with be used for with the assembly part pressure drop with locating part in the installation cavity.
2. A leak-proof pressure sensor as defined in claim 1, wherein the fitting comprises a body and a boss on the body, the second air guide channel extending from a bottom surface of the body to the boss, the pressure sensor chip and circuit board being mounted on a top surface of the boss.
3. A leak-proof pressure sensor as defined in claim 2, wherein the raised portion has a T-shaped vertical cross-section.
4. A leak-proof pressure sensor as defined in claim 2, wherein the mounting cavity comprises an upper mounting cavity and a lower mounting cavity, the lower mounting cavity being mated with the body, the body being located within the lower mounting cavity, the retainer being mounted in the upper mounting cavity, the bottom of the retainer abutting the body.
5. A leak-proof pressure sensor as defined in claim 4, wherein the retainer is threaded onto the inner arm of the upper mounting cavity.
6. A leak-proof pressure sensor as defined in any one of claims 1-5, wherein at least two O-rings are provided on the contact surface of the fitting with the mounting cavity.
7. A leak-proof pressure sensor as defined in claim 6, wherein two O-rings are provided between the bottom of the fitting and the bottom of the mounting cavity.
8. A leak-proof pressure sensor as defined in claim 6, wherein an O-ring is disposed between the bottom of the fitting and the bottom of the mounting cavity, and an O-ring is disposed between the side wall of the fitting and the side wall of the mounting cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321618621.7U CN220018804U (en) | 2023-06-25 | 2023-06-25 | Leakage-proof pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321618621.7U CN220018804U (en) | 2023-06-25 | 2023-06-25 | Leakage-proof pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220018804U true CN220018804U (en) | 2023-11-14 |
Family
ID=88691914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321618621.7U Active CN220018804U (en) | 2023-06-25 | 2023-06-25 | Leakage-proof pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220018804U (en) |
-
2023
- 2023-06-25 CN CN202321618621.7U patent/CN220018804U/en active Active
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