CN210893491U - Flexible connection pressure sensor - Google Patents
Flexible connection pressure sensor Download PDFInfo
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- CN210893491U CN210893491U CN201922053283.7U CN201922053283U CN210893491U CN 210893491 U CN210893491 U CN 210893491U CN 201922053283 U CN201922053283 U CN 201922053283U CN 210893491 U CN210893491 U CN 210893491U
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- elastic body
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Abstract
The utility model discloses a flexible connection pressure sensor, which comprises a shell, the liquid outlet end of a liquid inlet channel in the shell is provided with an elastomer, the lower end of the elastomer is connected with the inner wall of the liquid outlet end of the liquid inlet channel of the shell through screw threads, the elastomer can be independently replaced when unqualified in detection, the manufacturing cost is saved, a stress release groove is arranged on the elastomer, an axial gap and a radial gap are also arranged between the elastomer and the shell, when the elastomer is screwed into the shell, the screwing-in stress can be better isolated and upwards transmitted to an elastic surface, and the measurement accuracy of the elastic circuit on the elastic surface is ensured not to be influenced by external force; meanwhile, a C-shaped connecting piece is arranged between the circuit board and the outer lead inside the shell and is in flexible connection, so that stable output of signals of the sensor is guaranteed.
Description
Technical Field
The utility model relates to a pressure sensor technical field especially relates to a flexonics pressure sensor.
Background
The sputtering film pressure sensor is a pressure sensor with excellent performance, has the advantages of high precision, wide working temperature range, good stability and the like, and is applied to a plurality of fields of aviation, aerospace, military industry, nuclear industry, petrifaction, traffic, metallurgy, food, medicine and the like.
The sputtering film pressure sensor in the prior art has complex manufacturing process and high manufacturing cost. After the elastomer and the pressure guide nozzle (shell) are welded together, tests such as fatigue can be carried out, once the leakage occurs or the performance of the elastomer meets the requirement, the elastomer and the pressure guide nozzle are scrapped, and the production cost is high. However, if the elastic member is provided separately from the housing, the measurement accuracy of the elastic member may be affected by the stress generated during the installation process. The existing sputtering film pressure sensor has the problems of poor wiring, unstable signal output and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem existing in the prior art and providing a flexible connection pressure sensor.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a flexible connection pressure sensor comprises a shell, wherein an elastic body is arranged at the liquid outlet end of a liquid inlet channel in the shell, the lower end of the elastic body is connected with the inner wall of the liquid outlet end of the liquid inlet channel of the shell through threads, and an O-shaped sealing ring for sealing is also arranged between the lower end of the elastic body and the inner wall of the liquid inlet channel of the shell;
the casing is characterized in that a circuit board is fixedly arranged on the upper end inside the casing, the circuit board is located outside the elastic body, the elastic body is electrically connected with the circuit board through an inner lead, and a C-shaped connecting piece is arranged between the circuit board and the outer lead.
Further, the elastomer is the cylinder that the middle part set up the hexagonal platform, the elastomer sets up the fastening screw thread with the internal thread threaded connection of casing in the below of hexagonal platform, the below of fastening screw thread sets up the seal groove that holds O type sealing washer, the elastomer sets up annular stress relief groove in the top of hexagonal platform, the top surface of elastomer is the sealed elastic surface of hexagonal platform.
Further, when the fastening thread section of the elastic body is completely screwed into the liquid inlet channel of the shell, an axial gap is reserved between the lower surface of the hexagonal platform of the elastic body and the shell, and a radial gap is reserved between the side surface of the hexagonal platform and the shell.
Further, the axial clearance is not less than 1mm, and the radial clearance is not less than 1.5 mm.
Furthermore, the circuit board is annular, and the upper surface of the circuit board and the elastic surface of the elastic body are on the same horizontal plane.
Further, the lower end of the shell is provided with an external thread for installation and fixation.
Furthermore, a sealing connector is arranged at the top of the shell, and the connector is welded with the shell.
The manufacturing method of the flexible connection pressure sensor comprises the following steps:
s1, processing the shell according to the requirement;
s2, processing the elastic body according to the requirement and manufacturing a sensitive circuit on the elastic surface;
s3, sleeving an O-shaped sealing ring on the sealing groove of the elastomer;
s4, screwing the elastic body into the mounting position of the shell;
s5, installing a circuit board in the shell;
s6, manufacturing an inner lead between the sensitive circuit and the circuit board on the elastic surface;
s7: the connector with the outer leads and the C-shaped connector mounted thereon is joined to the housing and hermetically welded at the joint.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the C-shaped connecting piece is arranged between the circuit board and the outer lead wire in the flexible connection pressure sensor for flexible connection, and even if manufacturing tolerance and assembly tolerance exist on the circuit board or the outer lead wire, the circuit board can be stably connected with the outer lead wire through the C-shaped connecting piece, and signals can be reliably output.
2. The elastic piece in the flexible connection pressure sensor is provided with the stress relief groove, so that when the elastic body is screwed into the shell, screwing-in stress can be isolated and upwards transmitted to the elastic surface, and the measurement accuracy of an elastic circuit on the elastic surface is not influenced by external force; meanwhile, the axial gap is 1mm, the radial gap is more than 1.5mm, the screwing mechanical stress can be dispersed, the influence of the installation stress on the sensor is reduced, and the precision and the stability of the sensor are ensured.
3. The elastic body in the flexible connection pressure sensor can be detachably connected with the shell, and can be independently replaced when the elastic body is unqualified in detection, so that the manufacturing cost is saved.
Drawings
FIG. 1 is a schematic structural diagram of the present flexible link pressure sensor;
FIG. 2 is a schematic structural diagram of an elastomer in the present flexible connection pressure sensor;
FIG. 3 is a top view of the elastomer in the present flexible link pressure sensor;
fig. 4 is a schematic view of the mounting structure of the elastic body in the flexible connection pressure sensor.
In the figure: 1. a housing; 2. an elastomer; 3. a connector assembly; 4. a circuit board; 5. an inner lead; 6. an outer lead; 7. a C-shaped connecting piece; 8. an outer sealing ring; 9. an external thread; 10. an O-shaped sealing ring; 11. an internal thread; 12. an axial clearance; 13. a radial gap; 21. a hexagonal table; 22. an elastic surface; 23. fastening threads; 24. a sealing groove; 25. a stress relief groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1, a flexible connection pressure sensor, includes casing 1, the inside inlet channel of casing 1 goes out the liquid end and sets up elastomer 2, the lower extreme of elastomer 2 passes through threaded connection with the inner wall that the inlet channel of casing 1 goes out the liquid end, and the lower extreme of elastomer 2 leads to still to set up sealed O type sealing washer 10 with the inlet channel inner wall of casing 1, but elastomer 2 and casing 1 split are connected, can change alone when elastomer 2 detects nonconformity, practices thrift manufacturing cost.
Referring to fig. 1, 2 and 3, specifically, the elastic body 2 is a pressure sensitive core manufactured by a sputtering film technology, the elastic body 2 is a cylinder with a hexagonal base 21 at the middle part, a fastening thread 23 in threaded connection with the internal thread 11 of the housing 1 is arranged below the hexagonal base 21 of the elastic body 2, an annular sealing groove 24 for accommodating the O-ring 10 is arranged below the fastening thread 23, an annular stress releasing groove 25 is arranged above the hexagonal base 21 of the elastic body 2, the top surface of the elastic body 2 is an elastic surface 22 sealed by the hexagonal base 21, a sensitive circuit is arranged on the elastic surface 22, when the elastic body 2 is screwed into the housing 1, screwing stress can be isolated and transmitted upwards to the elastic surface 22, and the measurement accuracy of the elastic circuit on the elastic surface 22 is guaranteed not to be influenced by external force.
Further, referring to fig. 4, when fastening screw 23 section of elastomer 2 was screwed into the inlet channel of casing 1 completely, axial gap 12 was left between hexagonal platform 21 lower surface of elastomer 2 and casing 1, axial gap 12 was 1.5mm, radial gap 13 was left between the side of hexagonal platform 21 and casing 1, radial gap 13 was 2.0mm, and when the elastomer was screwed into the casing, the mechanical stress was screwed into in the dispersion to the distance of axial gap, had reduced the influence of installation stress to the sensor, guaranteed the precision and the stability of sensor.
Further, the fixed circuit board 4 that sets up of step face that establishes in the inside upper end of casing 1, the outside of the elastomer 2 that circuit board 4 is located, through inner lead 5 electric connection between elastomer 2 and the circuit board 4, set up C type connecting piece 7 between circuit board 4 and the outer lead 6, with its flexonics, even there are manufacturing tolerance and assembly tolerance on circuit board 4 or the outer lead 6, the circuit board can all be stably connected through C type connecting piece 7 and outer lead 6 to reliably output the signal.
Furthermore, the circuit board 4 is annular, and the upper surface of the circuit board 4 and the elastic surface 22 of the elastic body 2 are in the same horizontal plane, so that the inner leads 5 can be conveniently connected with the elastic body 2 and the circuit board 4.
Further, the lower extreme setting of casing 1 is used for the fixed external screw thread 9 of installation, and the upper end of external screw thread 9 sets up outer seal ring 8, and is fixed by the installation when casing 1, and during the inlet channel entering elastomer 2 of measured liquid through casing 1, liquid extrudeed the elastic surface 22 of elastomer 2 for the strain current that sensitive circuit produced on the elastic surface 22, the pressure of liquid becomes the signal of telecommunication.
Furthermore, a sealing connector 3 is arranged on the top of the shell 1, and the connector 3 is welded with the shell 1.
The manufacturing method of the flexible connection pressure sensor comprises the following steps:
s1, processing the shell 1 according to the requirement;
s2, processing the elastic body 2 according to the requirement and manufacturing a sensitive circuit on the elastic surface 22;
s3, sleeving an O-shaped sealing ring 11 on the sealing groove 24 of the elastic body 2;
s4, screwing the elastic body 2 into the mounting position of the shell 1;
s5, installing the circuit board 4 in the shell 1;
s6, manufacturing a sensitive circuit on the elastic surface 22 and welding an inner lead 5 between the sensitive circuit and the circuit board 4;
s7: the connector 3 with the outer lead 6 and the C-type connector 7 mounted thereon is joined to the housing 1 and hermetically welded at the joint.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (7)
1. The flexible connection pressure sensor is characterized by comprising a shell (1), wherein an elastic body (2) is arranged at the liquid outlet end of a liquid inlet channel in the shell (1), the lower end of the elastic body (2) is in threaded connection with the inner wall of the liquid outlet end of the liquid inlet channel in the shell (1), and an O-shaped sealing ring (10) for sealing is arranged at the lower end of the elastic body (2) and communicated with the inner wall of the liquid inlet channel in the shell (1);
the fixed circuit board (4) that sets up of step face established in casing (1) inside upper end, the outside of elastomer (2) that circuit board (4) are located, through inner lead (5) electric connection between elastomer (2) and circuit board (4), set up C type connecting piece (7) between circuit board (4) and outer lead (6).
2. The flexible connection pressure sensor according to claim 1, wherein the elastic body (2) is a cylinder with a hexagonal platform (21) in the middle, the elastic body (2) is provided with a fastening thread (23) which is in threaded connection with the internal thread (11) of the housing (1) below the hexagonal platform (21), a sealing groove (24) for accommodating the O-shaped sealing ring (10) is arranged below the fastening thread (23), the elastic body (2) is provided with an annular stress relief groove (25) above the hexagonal platform (21), and the top surface of the elastic body (2) is an elastic surface (22) for sealing the hexagonal platform (21).
3. A flexible connection pressure sensor according to claim 1, characterized in that when the fastening thread (23) section of the elastic body (2) is screwed completely into the inlet channel of the housing (1), an axial gap (12) is left between the lower surface of the hexagonal platform (21) of the elastic body (2) and the housing (1), and a radial gap (13) is left between the side surface of the hexagonal platform (21) and the housing (1).
4. A flexible connection pressure sensor according to claim 3, characterized in that the axial gap (12) is not less than 1mm and the radial gap (13) is not less than 1.5 mm.
5. A flexible connection pressure sensor according to claim 1, characterized in that the circuit board (4) is ring-shaped, and the upper surface of the circuit board (4) is at the same level as the elastic surface (22) of the elastic body (2).
6. A flexible connection pressure sensor according to claim 1, characterized in that the lower end of the housing (1) is provided with an external thread (9) for mounting and fixation.
7. A flexible connection pressure sensor according to claim 1, characterized in that a sealing connector (3) is arranged on the top of the housing (1), and the connector (3) is welded to the housing (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922053283.7U CN210893491U (en) | 2019-11-25 | 2019-11-25 | Flexible connection pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922053283.7U CN210893491U (en) | 2019-11-25 | 2019-11-25 | Flexible connection pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210893491U true CN210893491U (en) | 2020-06-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922053283.7U Active CN210893491U (en) | 2019-11-25 | 2019-11-25 | Flexible connection pressure sensor |
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| Country | Link |
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| CN (1) | CN210893491U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115112287A (en) * | 2022-07-07 | 2022-09-27 | 东风柳州汽车有限公司 | Water pressure sensing device with freezing protection function for automobile |
| CN116147823A (en) * | 2022-12-21 | 2023-05-23 | 松诺盟科技有限公司 | Flat membrane type thin film core body and flat membrane type nano thin film pressure transmitter |
-
2019
- 2019-11-25 CN CN201922053283.7U patent/CN210893491U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115112287A (en) * | 2022-07-07 | 2022-09-27 | 东风柳州汽车有限公司 | Water pressure sensing device with freezing protection function for automobile |
| CN116147823A (en) * | 2022-12-21 | 2023-05-23 | 松诺盟科技有限公司 | Flat membrane type thin film core body and flat membrane type nano thin film pressure transmitter |
| CN116147823B (en) * | 2022-12-21 | 2024-03-22 | 松诺盟科技有限公司 | Flat membrane type thin film core body and flat membrane type nano thin film pressure transmitter |
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