CN219694413U - High-tightness pressure sensor - Google Patents
High-tightness pressure sensor Download PDFInfo
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- CN219694413U CN219694413U CN202320434951.4U CN202320434951U CN219694413U CN 219694413 U CN219694413 U CN 219694413U CN 202320434951 U CN202320434951 U CN 202320434951U CN 219694413 U CN219694413 U CN 219694413U
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- sensor
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- 239000000919 ceramic Substances 0.000 claims abstract description 66
- 239000004677 Nylon Substances 0.000 claims abstract description 31
- 229920001778 nylon Polymers 0.000 claims abstract description 31
- 238000007789 sealing Methods 0.000 claims abstract description 26
- 239000004033 plastic Substances 0.000 claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 238000012544 monitoring process Methods 0.000 abstract description 5
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000001684 chronic effect Effects 0.000 description 6
- JAYCNKDKIKZTAF-UHFFFAOYSA-N 1-chloro-2-(2-chlorophenyl)benzene Chemical compound ClC1=CC=CC=C1C1=CC=CC=C1Cl JAYCNKDKIKZTAF-UHFFFAOYSA-N 0.000 description 5
- 101100084627 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) pcb-4 gene Proteins 0.000 description 5
- 230000035882 stress Effects 0.000 description 5
- 230000032683 aging Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model provides a high-tightness pressure sensor, which comprises a shell and a ceramic sensor, wherein a liquid inlet channel is formed in the shell, a connector plastic shell is connected to the top of the shell in a threaded manner, a contact pin is connected to the inside of the connector plastic shell in an embedded manner, a sealing ring is connected to the bottom of the connector plastic shell in a sleeved manner, a PCB (printed Circuit Board) is fixedly connected to the top of the ceramic sensor, an FPC (flexible printed Circuit) wire is connected to the inside of the PCB in a welded manner, a second post and a first post are integrally formed in the shell, an O-shaped ring is arranged on the inner side of the ceramic sensor, and a nylon retainer ring is connected to the top of the ceramic sensor in a contact manner; the technical key points are as follows: through at the inside integrated into one piece second post and the first column cap of shell, detain the outside at the second post with ceramic sensor, can make the contact of the inboard O type circle of ceramic sensor and the top of first column cap after, greatly reduced required sealed scope is favorable to reducing the leakage volume of medium from the inside to the shell inside of feed liquor passageway in the pressure monitoring process.
Description
Technical Field
The utility model belongs to the technical field of pressure sensors, and particularly relates to a high-tightness pressure sensor.
Background
The pressure sensor can sense the pressure signal and can convert the pressure signal into a usable output electric signal according to a certain rule. Pressure sensors are generally composed of pressure sensitive elements and signal processing units, which can be classified into gauge pressure sensors, differential pressure sensors, and absolute pressure sensors according to different test pressure types. The pressure sensor is the most commonly used sensor in industrial practice, is widely applied to various industrial self-control environments, and relates to various industries such as water conservancy and hydropower, railway traffic, intelligent building, production self-control, aerospace, military industry, petrochemical industry, oil well, electric power, ships, machine tools, pipelines and the like.
The anti-corrosion ceramic pressure sensor of the electronic pressure controller with the publication number of CN201020633265 in the prior art has no liquid transmission, the pressure directly acts on the front surface of the ceramic diaphragm to cause the diaphragm to generate tiny deformation, thick film resistors are printed on the back surface of the ceramic diaphragm and are connected into a Wheatstone bridge (closed bridge), and the bridge generates a voltage signal which has high linearity and is proportional to the pressure and is also proportional to the excitation voltage due to the piezoresistive effect of the piezoresistors. Ceramics are a well-known material that is highly resilient, corrosion-resistant, abrasion-resistant, impact-resistant, and vibration-resistant.
However, in the process of implementing the above technical solution, the following technical problems are found in the above technical solution:
the existing pressure controller is provided with a sealing ring through a fixing ring, and a second sealing ring is arranged between the ceramic diaphragm and the inner side bottom surface of the fixing ring, but the sealing ring is seriously affected by chronic corrosion and aging in corrosive media, and aging is faster under temperature alternation, and chronic leakage can occur after long-time use.
Disclosure of Invention
In order to overcome the defects in the prior art, the embodiment of the utility model provides the high-tightness pressure sensor, the second column head and the first column head are integrally formed in the shell, when the ceramic sensor is buckled outside the second column head, the O-shaped ring positioned at the inner side of the ceramic sensor is contacted with the top end of the first column head, so that the sealing range is greatly reduced, the leakage amount of a medium from the inside of a liquid inlet channel to the inside of the shell in the pressure monitoring process is reduced, the stress on each component contacted with the ceramic sensor is reduced, the problem that the sealing ring of the traditional pressure controller is seriously influenced by chronic corrosion and ageing in a corrosive medium is solved, the ageing is faster under the condition of temperature alternation, and the chronic leakage can occur after long-time use.
The technical scheme adopted by the embodiment of the utility model for solving the technical problems is as follows:
the high-tightness pressure sensor comprises a shell and a ceramic sensor, wherein a liquid inlet channel is formed in the shell, a connector plastic shell is connected to the top of the shell in a threaded mode, a contact pin is connected to the inside of the connector plastic shell in an embedded mode, and a sealing ring is connected to the bottom of the connector plastic shell in a sleeved mode;
the top of ceramic sensor is fixedly connected with the PCB board, the inside welding of PCB board is connected with the FPC line.
In one possible implementation, the inner side surface of the sealing ring is in contact connection with the outer side surface of the connector plastic housing, and the outer side surface of the sealing ring is in contact connection with the inner side surface of the housing.
In one possible implementation manner, one end of the FPC wire is connected with the bottom end of the pin in a welded manner, and the FPC wire is movably connected inside the connector plastic housing.
In one possible implementation manner, the second post and the first post are integrally formed in the shell, the first post is located at the top of the second post, and the ceramic sensor is connected to the outer part of the second post in a fastening mode.
In one possible implementation, an O-ring is disposed on the inner side of the ceramic sensor, and the O-ring is connected to the top of the first column head in a fastening manner.
In one possible implementation, the diameter of the first post is smaller than the diameter of the second post, and the diameter of the O-ring is smaller than the diameter of the first post.
In one possible implementation manner, a nylon check ring is connected to the top of the ceramic sensor in a contact manner, and the nylon check ring is connected to the outside of the PCB in a sleeved mode.
In one possible implementation manner, the top of the nylon check ring is connected with a hole check ring in a contact mode, the FPC wire is movably connected inside the hole check ring, and the hole check ring is connected inside the shell in a clamping mode.
In summary, the present utility model includes at least one of the following beneficial technical effects:
1. through the integrated molding of the second column head and the first column head in the shell, when the ceramic sensor is buckled outside the second column head, the O-shaped ring positioned at the inner side of the ceramic sensor is contacted with the top end of the first column head, so that the sealing range is greatly reduced, the leakage amount of a medium from the inside of the liquid inlet channel to the inside of the shell in the pressure monitoring process is reduced, the pressure is applied to the ceramic sensor when the medium enters the bottom of the ceramic sensor from the liquid inlet channel, and the stress on components contacted with the ceramic sensor is reduced;
2. the ceramic sensor is buckled outside the second column head, so that a first layer of seal is formed between the O-shaped ring at the inner side of the ceramic sensor and the top of the first column head, and the nylon check ring is arranged at the top of the ceramic sensor, so that the nylon check ring is positioned at the outer side of the hole check ring, a second layer of seal is formed, the O-shaped ring can be aged by utilizing the double-way seal, after slight leakage exists around the O-shaped ring, the nylon check ring bears the sealing task, the problem of chronic leakage in the long-term use process of the utility model can be effectively solved, and the service life of the utility model is prolonged.
Drawings
FIG. 1 is a schematic view of the external structure of the present utility model;
FIG. 2 is a top view of the present utility model;
FIG. 3 is a bottom view of the present utility model;
fig. 4 is a cross-sectional view of the present utility model.
Description of the drawings: 1. a connector plastic shell; 2. a contact pin; 3. an FPC wire; 4. a PCB board; 5. an O-ring; 6. a ceramic sensor; 7. a seal ring; 8. a hole-type retainer ring; 9. nylon retainer rings; 10. a housing; 11. a first column head; 12. a second column; 13. and a liquid inlet channel.
Detailed Description
The technical scheme in the embodiment of the utility model aims to solve the problems of the background technology, and the general thought is as follows:
example 1:
the embodiment introduces a specific structure of the high-tightness pressure sensor, and particularly referring to fig. 1-4, the high-tightness pressure sensor comprises a shell 10 and a ceramic sensor 6, wherein a liquid inlet channel 13 is processed in the shell 10, a connector plastic shell 1 is connected to the top of the shell 10 in a threaded manner, a contact pin 2 is connected to the inside of the connector plastic shell 1 in an embedded manner, and a sealing ring 7 is connected to the bottom of the connector plastic shell 1 in a sleeved manner;
the top of the ceramic sensor 6 is fixedly connected with a PCB 4, and the inside of the PCB 4 is welded with an FPC wire 3;
in order to seal the gap between the outer wall of the connector plastic case 1 and the inner wall of the housing 10, after the IBU of the connector plastic case 1 is screwed with the top of the housing 10, the inner side surface of the sealing ring 7 is in contact connection with the outer side surface of the connector plastic case 1, and the outer side surface of the sealing ring 7 is in contact connection with the inner side surface of the housing 10;
secondly, in order to enable deformation signals of the ceramic sensor 6 to be transmitted to the contact pin 2 through the PCB 4, one end of the FPC wire 3 is connected with the bottom end of the contact pin 2 in a welded mode, and the FPC wire 3 is movably connected inside the connector plastic shell 1;
furthermore, in order that the ceramic sensor 6 can be closely contacted, the second column head 12 and the first column head 11 are integrally formed in the shell 10, so that the first column head 11 is positioned at the top of the second column head 12, the ceramic sensor 6 is connected outside the second column head 12 in a buckling manner, and the outer wall of the ceramic sensor is connected with the inner wall of the shell 10 in a contact manner;
meanwhile, an O-shaped ring 5 is arranged on the inner side of the ceramic sensor 6, the O-shaped ring 5 is connected to the top of the first column head 11 in a buckling mode, and when the ceramic sensor 6 is connected to the outer part of the second column head 12 in a buckling mode, the O-shaped ring 5 can be pressed between the inner wall of the ceramic sensor 6 and the top end of the first column head 11, so that an anti-leakage effect is achieved;
further, the diameter of the first column head 11 is smaller than that of the second column head 12, the diameter of the O-ring 5 is smaller than that of the first column head 11, and the sealing range of the O-ring 5 is reduced after the O-ring 5 contacts with the top end of the first column head 11 and the inner wall of the ceramic sensor 6 by making the circumference of the O-ring 5 smaller than that of the sealing ring in the prior art, so that the leakage amount of the medium from the inside of the liquid inlet channel 13 to the inside of the casing 10 in the pressure monitoring process can be reduced.
Meanwhile, by reducing the contact area between the O-shaped ring 5 and the inner wall of the ceramic sensor 6 and the top end of the first column head 11, under the same pressure, the stress on components in the shell 10 is greatly reduced, and the smaller the additional stress applied to the ceramic sensor 6 is, the higher precision and the longer service life of the components in the connector plastic shell 1 and the shell 10 can be ensured.
By adopting the technical scheme:
according to the design, the second column head 12 and the first column head 11 are integrally formed in the shell 10, when the ceramic sensor 6 is buckled outside the second column head 12, the O-shaped ring 5 positioned on the inner side of the ceramic sensor 6 is contacted with the top end of the first column head 11, compared with the sealing ring in the prior art, the sealing range of the sealing ring is greatly reduced, the leakage amount of a medium from the inside of the liquid inlet channel 13 to the inside of the shell 10 in the pressure monitoring process is reduced, the pressure is exerted on the ceramic sensor 6 when the medium enters the bottom of the ceramic sensor 6 from the liquid inlet channel 13, the stress on components contacted with the ceramic sensor 6 is reduced, and the service life of the ceramic sensor is prolonged.
Example 2:
based on the embodiment 1, the embodiment describes a specific structure of the supporting rod set, and a nylon retainer ring 9 is connected to the top of the ceramic sensor 6 in a contact manner;
the nylon check ring 9 is connected to the outside of the PCB 4 in a sleeved mode, the bottom end of the nylon check ring 9 is connected with the inner wall of the shell 10 in a contact mode and is connected with the top end of the ceramic sensor 6 in a contact mode, and when the top end of the nylon check ring 9 is contacted with the bottom end of the hole-type check ring 8, the top of the ceramic sensor 6 can be sealed, and medium leakage from the outer side to the inner side of the nylon check ring 9 is prevented;
secondly, in order to make nylon retaining ring 9 and the top in close contact with of ceramic sensor 6, connect hole type retaining ring 8 at the top contact of nylon retaining ring 9, make FPC line 3 movable connection in hole type retaining ring 8's inside to with hole type retaining ring 8 joint formula connection in the inside of shell 10 with nylon retaining ring 9 fixed between ceramic sensor 6 and hole type retaining ring 8, guarantee the nylon retaining ring 9 and prevent the inboard effect of medium seepage to nylon retaining ring 9.
The specific operation steps are as follows:
s1, sleeving an O-shaped ring 5 inside a ceramic sensor 6, enabling the ceramic sensor 6 to be buckled outside a second column head 12, and enabling the bottom end of the O-shaped ring 5 to be in contact connection with the top end of a first column head 11;
s2, installing a nylon check ring 9 at the top of the ceramic sensor 6, sleeving the nylon check ring 9 on the outer side of the PCB 4, clamping the hole-type check ring 8 into the shell 10, and tightly contacting the top end of the nylon check ring 9 with the bottom end of the hole-type check ring 8 to tightly contact the bottom end of the nylon check ring 9 with the top end of the ceramic sensor 6;
s3, sleeving a sealing ring 7 at the bottom of the connector plastic shell 1, connecting the connector plastic shell 1 in the shell 10 in a threaded manner, and sealing a gap between the connector plastic shell 1 and the connection point of the contact pin 2 by the sealing ring 7.
By adopting the technical scheme:
according to the design, the ceramic sensor 6 is buckled outside the second post 12, so that a first layer of seal is formed between the O-shaped ring 5 at the inner side of the ceramic sensor 6 and the top of the first post 11, the nylon check ring 9 is arranged at the top of the ceramic sensor 6, the nylon check ring 9 is positioned at the outer side of the hole type check ring 8, the hole type check ring 8 is clamped into the shell 10, the top end of the nylon check ring 9 is tightly contacted with the bottom end of the hole type check ring 8, the bottom end of the nylon check ring 9 is tightly contacted with the top end of the ceramic sensor 6, a second layer of seal is formed, the O-shaped ring 5 can be aged by utilizing the double-channel seal, after slight leakage exists around the O-shaped ring, the nylon check ring 9 bears a sealing task, and the nylon check ring 9 is not corroded before being contacted with a medium, so that the problem of chronic leakage in the long-term use process of the ceramic sensor is effectively solved, and the service life of the ceramic sensor is prolonged.
Finally, it should be noted that: it is apparent that the above examples are only illustrative of the present utility model and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present utility model.
Claims (8)
1. A high-tightness pressure sensor, comprising:
the connector comprises a shell (10), wherein a liquid inlet channel (13) is formed in the shell (10), a connector plastic shell (1) is connected to the top of the shell (10) in a threaded mode, a contact pin (2) is connected to the inside of the connector plastic shell (1) in an embedded mode, and a sealing ring (7) is connected to the bottom of the connector plastic shell (1) in a sleeved mode;
the ceramic sensor (6), the top fixed connection of ceramic sensor (6) has PCB board (4), the inside welded connection of PCB board (4) has FPC line (3).
2. The high-tightness pressure sensor of claim 1 wherein: the inner side surface of the sealing ring (7) is in contact connection with the outer side surface of the connector plastic shell (1), and the outer side surface of the sealing ring (7) is in contact connection with the inner side surface of the shell (10).
3. The high-tightness pressure sensor of claim 1 wherein: one end of the FPC wire (3) is connected with the bottom end of the contact pin (2) in a welded mode, and the FPC wire (3) is movably connected inside the connector plastic shell (1).
4. The high-tightness pressure sensor of claim 1 wherein: the inside integrated into one piece of shell (10) has second post (12) and first post (11), first post (11) are located the top of second post (12), ceramic sensor (6) lock joint connects the outside at second post (12).
5. The high-tightness pressure sensor according to claim 4, wherein: the inside of ceramic sensor (6) is provided with O type circle (5), O type circle (5) lock joint connects at the top of first column cap (11).
6. The high-tightness pressure sensor of claim 5 wherein: the diameter of the first column head (11) is smaller than that of the second column head (12), and the diameter of the O-shaped ring (5) is smaller than that of the first column head (11).
7. The high-tightness pressure sensor of claim 1 wherein: the top contact type of ceramic sensor (6) is connected with nylon retaining ring (9), nylon retaining ring (9) cup joint connection is in the outside of PCB board (4).
8. The high-tightness pressure sensor of claim 7 wherein: the top contact type nylon check ring (9) is connected with a hole type check ring (8), the FPC wire (3) is movably connected in the hole type check ring (8), and the hole type check ring (8) is connected in the shell (10) in a clamping mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320434951.4U CN219694413U (en) | 2023-03-09 | 2023-03-09 | High-tightness pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320434951.4U CN219694413U (en) | 2023-03-09 | 2023-03-09 | High-tightness pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219694413U true CN219694413U (en) | 2023-09-15 |
Family
ID=87942675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320434951.4U Active CN219694413U (en) | 2023-03-09 | 2023-03-09 | High-tightness pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219694413U (en) |
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2023
- 2023-03-09 CN CN202320434951.4U patent/CN219694413U/en active Active
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