CN217111281U - High-air-tightness micro differential pressure sensor - Google Patents
High-air-tightness micro differential pressure sensor Download PDFInfo
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- CN217111281U CN217111281U CN202123147077.6U CN202123147077U CN217111281U CN 217111281 U CN217111281 U CN 217111281U CN 202123147077 U CN202123147077 U CN 202123147077U CN 217111281 U CN217111281 U CN 217111281U
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Abstract
The utility model discloses a little differential pressure sensor of high gas tightness, including the main casing body, upper cover and circuit board, through a plurality of upper cover screw fixed connection between the main casing body and the upper cover, the main casing body all is equipped with the first fixed mouthful that corresponds with the upper cover screw with covering on with, circuit board and main internal fixed connection of casing, be connected with pressure interface and sensing element on the circuit board, be equipped with the installing port that corresponds with pressure interface on the main casing body, through a plurality of pressure interface fixed plate screw fixedly connected with fixed plates in the installing port. The utility model discloses can guarantee to use all in installation or when dismantling the product, pressure interface and the inside sensing element of product are in relatively stable state, have avoided causing the not hard up of pressure interface and the inside sensitive part of product and internal connection pipeline, gas leakage or and then cause the possibility that the product measurement is inaccurate or became invalid because of external force when using, and then avoid causing the maintenance cost after sale of bigger product.
Description
Technical Field
The utility model relates to a little differential pressure sensor technical field especially relates to a little differential pressure sensor of high-pressure gas leakproofness.
Background
The pressure interface commonly used by the micro differential pressure sensor is connected with the shell through threads, the inner end of a pressure interface product is connected with a sensor sensitive element through a silicone tube or metal tube dispensing mode, and the outer end of the pressure interface product is connected with a field air source through a silicone tube or a ferrule type sealing joint when in use.
However, in the process of installation or disassembly, the thread of the pressure interface may loosen, so that the pipeline connected with the sensitive part at the inner end of the pressure interface loosens to cause air leakage, and further cause inaccurate or invalid measurement of the product, thereby affecting the normal use of the product; meanwhile, a micro differential pressure sensor product with high air tightness is needed in some equipment or systems with higher sealing requirements for detecting leakage.
And current little differential pressure product uses threaded connection, and the inside silicone tube that uses of product connects or the metal pipe point is glued and all has the condition of leaking gas that causes the joint to become flexible because of the pressure interface is not flexible to have little leakage risk, influences detection quality.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving among the prior art pressure interface inside end and the easy not hard up pipeline that sensitive part is connected and cause gas leakage, and then cause the inaccurate or inefficacy problem of product measurement, and the little differential pressure sensor of a highly airtight nature that proposes.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a little differential pressure sensor of high gas tightness, includes main casing body, upper cover and circuit board, through a plurality of upper cover screw fixed connection between main casing body and the upper cover, all be equipped with the first fixed mouthful that corresponds with the upper cover screw on main casing body and the upper cover, circuit board and the inside fixed connection of main casing body, the electricity is connected with pressure interface and sensing element on the circuit board, be equipped with the installing port that corresponds with pressure interface on the main casing body, through a plurality of pressure interface fixed plate screw fixed connection fixed plates in the installing port.
Preferably, the circuit board is fixedly connected with the inner wall of the main casing body through a plurality of circuit board fixing screws, and third fixing openings corresponding to the circuit board fixing screws are formed in the circuit board and the main casing body.
Preferably, one end of the circuit board close to the pressure interface is electrically connected with a data interface, a socket corresponding to the data interface is arranged on the inner wall of the main shell, and an electric wire protective sleeve is fixedly inserted in the socket.
Preferably, a plurality of locking ports are arranged on the outer wall of the bottom of the main shell.
Preferably, one end of the pressure interface, which is close to the circuit board, is square, and the inner wall of the mounting port is square.
Preferably, the pressure interface is connected with a sensing element through a metal pipe, and the sensing element is welded on the circuit board.
Has the advantages that:
1. the utility model can ensure that the pressure interface and the sensitive element inside the product are in a relatively stable state when the product is mounted or dismounted, thereby avoiding the possibility of loosening and air leakage of the pressure interface, the sensitive parts inside the product and the internal connecting pipeline caused by external force or further causing inaccurate or invalid measurement of the product when in use, and further avoiding causing larger after-sale maintenance cost of the product;
2. the utility model discloses well user can pass through sealing joint and pressure interface connection being connected with outside air supply, and the use tool installation targets in place each joint zonulae occludens installation of outside, guarantees the gas tightness of system, and does not worry that can rotate and remove between pressure interface and tubular metal resonator, the sensing element, and the possibility of gas leakage can appear in the product, has realized the reliable sealed purpose of product, has guaranteed to produce property ability.
3. The utility model discloses well customer can use the instrument more to be absorbed in external connection when the product is used in the installation. Meanwhile, the metal pipes are welded inside the product, so that high sealing performance inside the product can be effectively guaranteed, the performance of the micro differential pressure product is improved, the product can be widely applied to the fields of detection leakage and the like with high requirements, and the application range of the product is expanded.
Drawings
Fig. 1 is an explosion structure schematic diagram of a high-pressure air tightness micro differential pressure sensor provided by the utility model.
In the figure: 1, covering screws; 2, covering the cover; 3, fixing a plate screw of the pressure interface; 4: a pressure interface fixing plate; 5, fixing screws for the circuit board; 6, a pressure interface; 7: a main housing; 8 circuit boards; 9, a wire protective sleeve; 10, a sensitive element; 11: a metal tube.
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 high-air-tightness micro differential pressure sensor comprises a main shell 7, an upper cover 2 and a circuit board 8, wherein the circuit board 8 is fixedly connected with the inner wall of the main shell 7 through a plurality of circuit board fixing screws 5, so that the circuit board 8 and the main shell 7 can be conveniently fixed and disassembled, and third fixing ports corresponding to the circuit board fixing screws 5 are respectively arranged on the circuit board 8 and the main shell 7;
in the embodiment, the main shell 7 and the upper cover 2 are fixedly connected through a plurality of upper cover screws 1, so that the main shell 7 and the upper cover 2 are convenient to fixedly detach, and the main shell 7 and the upper cover 2 are respectively provided with a first fixing port corresponding to the upper cover screws 1;
in the embodiment, the circuit board 8 is fixedly connected with the inside of the main shell 7, the circuit board 8 is electrically connected with the pressure interface 6 and the sensing element 10, the pressure interface 6 is connected with the sensing element 10 through the metal pipe 11, and the sensing element 10 is welded on the circuit board 8;
in this embodiment, one end of the circuit board 8 close to the pressure interface 6 is electrically connected with a data interface for connecting with an external data wire, the inner wall of the main housing 7 is provided with a socket corresponding to the data interface, a wire protection sleeve 9 is fixedly inserted in the socket to play a role of sealing protection, and the main housing 7 is provided with a mounting port corresponding to the pressure interface 6;
in this embodiment, through 3 fixedly connected with fixed plate 4 of a plurality of pressure interface fixed plate screws in the installing port, pressure interface 6 is square form near the one end of circuit board 8, and the inner wall of installing port is square form, is equipped with a plurality of locking mouths on main casing body 7's the bottom outer wall.
In this embodiment, the pressure port 6, the sensing element 10, the metal tube 11, and the circuit board 8 of the whole product form a firm body by combining the pressure port fixing plate 4 and the main body case 7 through the pressure port fixing plate screw 3.
In the embodiment, a user can be connected with an external air source through the sealing joint and the pressure interface 6, and the external joints are tightly connected and installed in place by using a tool for installation, so that the air tightness of the system is ensured, the possibility of air leakage of the product due to rotation and movement among the pressure interface 6, the metal pipe 11 and the sensitive element 10 is avoided, the purpose of reliable sealing of the product is realized, and the performance of the product is ensured.
In this embodiment, can guarantee to use all when installing or dismantling the product, pressure interface 6 is in relatively stable state with the inside sensing element of product, has avoided causing the not hard up of pressure interface 6 and the inside sensitive part of product and internal connection pipeline, gas leakage or and then cause the product to measure the possibility inaccurate or that became invalid because of external force when using, and then avoids causing bigger product after-sales maintenance cost.
In this embodiment, the square structure is used in being connected of pressure interface 6 and casing, can once process out on the shell, has avoided the process of later stage processing pressure interface screw thread, has also saved the cost of labor, avoids the defective products that cause of product postprocessing to improve production efficiency and control cost.
In this embodiment, the customer can use the tool to focus more on the external connection when installing the use product. Meanwhile, the metal pipes are welded inside the product, so that high sealing performance inside the product can be effectively guaranteed, the performance of the micro differential pressure product is improved, the product can be widely applied to the fields of detection leakage and the like with high requirements, and the application range of the product is expanded.
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 (6)
1. A high-air-tightness micro-differential pressure sensor comprises a main shell (7), an upper cover (2) and a circuit board (8), and is characterized in that: the utility model discloses a pressure sensor, including main casing body (7), main casing body (7) and upper cover (2), all be equipped with the first fixed mouthful that corresponds with upper cover screw (1) between main casing body (7) and upper cover (2), circuit board (8) and the inside fixed connection of main casing body (7), electricity is connected with pressure interface (6) and sensing element (10) on circuit board (8), be equipped with the installing port that corresponds with pressure interface (6) on main casing body (7), through a plurality of pressure interface fixed plate screws (3) fixedly connected with fixed plate (4) in the installing port.
2. The high-airtightness micro differential pressure sensor according to claim 1, wherein: the circuit board (8) is fixedly connected with the inner wall of the main shell (7) through a plurality of circuit board fixing screws (5), and third fixing openings corresponding to the circuit board fixing screws (5) are formed in the circuit board (8) and the main shell (7).
3. The high-airtightness micro differential pressure sensor according to claim 1, wherein: one end of the circuit board (8) close to the pressure interface (6) is electrically connected with a data interface, a socket corresponding to the data interface is arranged on the inner wall of the main shell (7), and an electric wire protective sleeve (9) is fixedly inserted in the socket.
4. The high-airtightness micro differential pressure sensor according to claim 1, wherein: the outer wall of the bottom of the main shell (7) is provided with a plurality of locking ports.
5. The high-airtightness micro differential pressure sensor according to claim 1, wherein: one end of the pressure interface (6) close to the circuit board (8) is square, and the inner wall of the mounting opening is square.
6. The high-airtightness micro differential pressure sensor according to claim 1, wherein: the pressure interface (6) is connected with a sensitive element (10) through a metal pipe (11), and the sensitive element (10) is welded on the circuit board (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123147077.6U CN217111281U (en) | 2021-12-15 | 2021-12-15 | High-air-tightness micro differential pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123147077.6U CN217111281U (en) | 2021-12-15 | 2021-12-15 | High-air-tightness micro differential pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217111281U true CN217111281U (en) | 2022-08-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123147077.6U Active CN217111281U (en) | 2021-12-15 | 2021-12-15 | High-air-tightness micro differential pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217111281U (en) |
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2021
- 2021-12-15 CN CN202123147077.6U patent/CN217111281U/en active Active
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