Gas sensor base structure
By designing a hollow structure gas sensor base to narrow the internal gas chamber and gas diffusion path, the problem of slow response speed of gas sensors in the prior art is solved, and faster response speed and adaptability are achieved.
Patent Information
- Application Number
- CN202421557179.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-02
AI Technical Summary
The internal gas chamber of the existing gas sensor base is large, which affects the sensor's response speed.
A gas sensor base structure is designed, including a hollow lower case and an upper case. By reducing the internal gas chamber of the base and reducing the gas diffusion path, an annular sensor pressure ring and explosion-proof net structure are adopted to improve the sensor response speed.
By reducing the internal gas chamber and gas diffusion path of the base, the response speed of the gas sensor is significantly accelerated and adapted to gas sensors of different structures.
Smart Images
Figure CN222866598U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gas detection, in particular to a gas sensor base structure. Background Art
[0002] Electrochemical gas sensors are sensors that use the principle of electrochemical catalysis to detect and analyze target gases. They have the advantages of good selectivity, high sensitivity, and fast response time. Because electrochemical gas sensors are very sensitive to toxic gases such as ammonia, carbon monoxide, sulfur dioxide, hydrogen sulfide, chlorine, phosgene, and hydrogen fluoride, they are often used as early warnings for toxic gas leaks in the environment to avoid threats to people's health from toxic substances. A typical electrochemical gas sensor includes internal components such as a working electrode, a counter electrode, a reference electrode, and a diaphragm. An upper cover and a lower shell are then used to place the internal components between the upper cover and the lower shell for packaging.
[0003] Since gas sensors are often used in industrial and mining enterprises, the working environment has certain requirements for the protection level, so gas sensors are usually installed in a detachable base, which can not only protect the gas sensor, but also facilitate replacement when the gas sensor exceeds the validity period, fails, or needs to switch the detection gas. At present, the gas sensor in the existing technology has the problem that the internal air chamber of the base is large, which affects the response speed of the sensor. Summary of the invention
[0004] In order to overcome the deficiencies of the prior art, the utility model proposes a gas sensor base structure, which reduces the internal air chamber of the base, reduces the gas diffusion path, speeds up the response speed of the gas sensor, and can adapt to gas sensors of different structures.
[0005] To achieve the above-mentioned purpose, the gas sensor base structure of the utility model includes a lower shell and an upper shell, the lower shell and the upper shell are hollow, the upper shell is detachably connected to the lower shell, a mounting seat is provided at one end of the lower shell close to the upper shell, a circuit board is provided on the side of the mounting seat facing away from the upper shell, a sensor body is provided on the side of the mounting seat close to the upper shell, an air inlet is provided at one end of the upper shell away from the lower shell, a flameproof net is provided on the air inlet, and a sensor pressure ring is provided between the flameproof net and the sensor body.
[0006] Furthermore, a first step is provided at one end of the lower shell body facing the upper shell body, the inner diameter of the first step is larger than the inner diameter of the lower shell body, and the mounting seat is provided on the first step.
[0007] Furthermore, a second step is provided at one end of the upper shell body close to the air inlet, the inner diameter of the second step is larger than the inner diameter of the air inlet, the inner diameter of the second step is smaller than the inner diameter of the upper shell body, and the flameproof net is installed on the second step.
[0008] Furthermore, the sensor pressure ring is a ring-shaped structure, the end of the sensor body extends into the inner cavity of the sensor pressure ring, and an internal air chamber is formed between the inner cavity of the sensor pressure ring and the flameproof net.
[0009] Furthermore, a third step is provided at one end of the sensor pressure ring away from the flameproof net, the inner diameter of the third step is larger than the inner diameter of the sensor pressure ring, a fourth step is provided in the middle of the sensor body, the diameter of the fourth step is larger than the diameter of the end of the sensor body, and an O-ring is provided between the third step and the fourth step.
[0010] Furthermore, the lower shell is connected to the upper shell by threads, and a base opening is provided at one end of the lower shell facing away from the upper shell.
[0011] The gas sensor base structure of the utility model reduces the gas chamber inside the base, reduces the gas diffusion path, speeds up the response speed of the gas sensor, and can be adapted to gas sensors of different structures. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The utility model is further described and elaborated below in conjunction with the accompanying drawings.
[0013] Figure 1 It is a structural schematic diagram of the gas sensor base structure of the preferred embodiment of the utility model.
[0014] Figure 2 yes Figure 1 Cross-sectional view at AA in the middle.
[0015] Figure 3 It is an exploded view of the gas sensor base structure.
[0016] Figure numerals: 1, lower shell; 11, first step; 2, upper shell; 21, second step; 3, mounting seat; 4, circuit board; 5, sensor body; 51, fourth step; 6, explosion-proof net; 7, sensor pressure ring; 71, third step; 8, O-ring. DETAILED DESCRIPTION
[0017] The technical solution of the present invention will be more clearly and completely explained below by describing the preferred embodiments of the present invention in combination with the accompanying drawings.
[0018] like Figure 1 and Figure 2 As shown, the gas sensor base structure of the preferred embodiment of the utility model includes a lower shell 1 and an upper shell 2. The lower shell 1 and the upper shell 2 are hollow, and the upper shell 2 is detachably connected to the lower shell 1 through threads.
[0019] like Figure 2 and Figure 3As shown, a first step 11 is provided at one end of the lower housing 1 facing the upper housing 2, the inner diameter of the first step 11 is larger than the inner diameter of the lower housing 1, a mounting seat 3 is provided on the first step 11, a circuit board 4 is provided on the side of the mounting seat 3 facing away from the upper housing 2, and a sensor body 5 is provided on the side of the mounting seat 3 close to the upper housing 2. The electrodes of the sensor body 5 are electrically connected to the circuit board 4, and a base opening is provided at one end of the lower housing 1 facing away from the upper housing 2, and the circuit board 4 can be electrically connected to an external signal processing device by passing a wire through the base opening.
[0020] like Figure 2 and Figure 3 As shown, an air inlet is provided at one end of the upper shell 2 away from the lower shell 1, and a second step 21 is provided at one end of the upper shell 2 close to the air inlet. The inner diameter of the second step 21 is larger than the inner diameter of the air inlet, and the inner diameter of the second step 21 is smaller than the inner diameter of the upper shell 2. An explosion-proof net 6 is provided on the second step 21, and the inner cavity of the base is isolated from the outside by the explosion-proof net 6 to protect the sensor. At the same time, the explosion-proof net 6 is a mesh structure and will not hinder the flow of gas.
[0021] like Figure 2 and Figure 3 As shown, a sensor pressure ring 7 is provided between the flameproof net 6 and the sensor body 5. The sensor pressure ring 7 is a ring-shaped structure, and the end of the sensor body 5 extends into the inner cavity of the sensor pressure ring 7, and an internal air chamber is formed between the inner cavity of the sensor pressure ring 7 and the flameproof net 6. The volume of the internal air chamber is greatly reduced by providing the sensor pressure ring 7, which can effectively speed up the response speed of the sensor. The size of the sensor pressure ring 7 can be selected according to the model and volume of the sensor body 5.
[0022] like Figure 2 and Figure 3 As shown, a third step 71 is provided at the end of the sensor pressure ring 7 facing away from the explosion-proof net 6, and the inner diameter of the third step 71 is larger than the inner diameter of the sensor pressure ring 7. A fourth step 51 is provided in the middle of the sensor body 5, and the diameter of the fourth step 51 is larger than the diameter of the end of the sensor body 5. An O-ring 8 is provided between the third step 71 and the fourth step 51 to improve the sealing performance.
[0023] The gas sensor base structure of the utility model reduces the gas chamber inside the base, reduces the gas diffusion path, speeds up the response speed of the gas sensor, and can be adapted to gas sensors of different structures.
[0024] The above specific implementations are only descriptions of the preferred implementations of the utility model, and do not limit the protection scope of the utility model. Under the premise of not departing from the design concept and spirit of the utility model, various deformations, substitutions and improvements made by ordinary technicians in this field to the technical solution of the utility model based on the text description and drawings provided by the utility model should all fall within the protection scope of the utility model. The protection scope of the utility model is determined by the claims.
Claims
1. A gas sensor base structure, characterized in that: The invention comprises a lower shell (1) and an upper shell (2), wherein the lower shell (1) and the upper shell (2) are hollow, and the upper shell (2) is detachably connected to the lower shell (1). A mounting seat (3) is provided at one end of the lower shell (1) close to the upper shell (2), and a circuit board (4) is provided at the side of the mounting seat (3) facing away from the upper shell (2). A sensor body (5) is provided at the side of the mounting seat (3) close to the upper shell (2). An air inlet is provided at one end of the upper shell (2) away from the lower shell (1), and a flameproof net (6) is provided on the air inlet. A sensor pressure ring (7) is provided between the flameproof net (6) and the sensor body (5).
2. The gas sensor base structure according to claim 1, characterized in that: A first step (11) is provided at one end of the lower shell (1) facing the upper shell (2); the inner diameter of the first step (11) is larger than the inner diameter of the lower shell (1); and the mounting seat (3) is arranged on the first step (11).
3. The gas sensor base structure according to claim 2, characterized in that: A second step (21) is provided at one end of the upper shell (2) close to the air inlet, the inner diameter of the second step (21) is larger than the inner diameter of the air inlet, the inner diameter of the second step (21) is smaller than the inner diameter of the upper shell (2), and the flameproof net (6) is mounted on the second step (21).
4. The gas sensor base structure according to claim 3, characterized in that: The sensor pressure ring (7) is a ring-shaped structure, and the end of the sensor body (5) extends into the inner cavity of the sensor pressure ring (7). An internal air chamber is formed between the inner cavity of the sensor pressure ring (7) and the flameproof net (6).
5. The gas sensor base structure according to claim 1, characterized in that: A third step (71) is provided at one end of the sensor pressure ring (7) facing away from the explosion-proof net (6), and the inner diameter of the third step (71) is larger than the inner diameter of the sensor pressure ring (7). A fourth step (51) is provided in the middle of the sensor body (5), and the diameter of the fourth step (51) is larger than the diameter of the end of the sensor body (5). An O-ring (8) is provided between the third step (71) and the fourth step (51).
6. The gas sensor base structure according to claim 1, characterized in that: The lower shell (1) is connected to the upper shell (2) via threads, and a base opening is provided at one end of the lower shell (1) facing away from the upper shell (2).