Leakage-proof electrochemical gas sensor

Abstract

The utility model relates to a leakage-proof electrochemical gas sensor, which comprises a lower cover (1) and an upper cover (2) arranged at the top of the lower cover (1) in a matched manner, and a gas hole (203) is formed in the center of the upper cover (2); and the plurality of pins (3) are positioned at the bottom of the sensor. By adopting the technical scheme, the leakage-proof electrochemical gas sensor can effectively solve the problem of leakage of the electrochemical gas sensor, and can enhance the sealing property of the sensor, improve the test accuracy and prolong the service life of the electrochemical sensor. The number of the pins of the electrochemical gas sensor can be two or more, the electrochemical gas sensor can be used by other solid sensors or other products with high sealing performance requirements, the liquid leakage risk can be greatly reduced, the sealing performance is enhanced, and test data are more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to the field of electrochemical gas sensors, and refers to a leak-proof electrochemical gas sensor. Background Art

[0002] Gas sensors include a series of sensors of different types and principles such as CH4, H2, O2, H2S, CO, SO2, CO2, VOC, etc. Since the sensors can sensitively detect gases, and then display the gas concentration in the environment, corresponding danger warnings and remedial measures are carried out. Especially, electrochemical gas sensors have the advantages of small volume, high sensitivity, fast response time, and preferential price, and are widely used in the detection fields of toxic and harmful gases such as petrochemical industry, mine, and medical treatment. However, current electrochemical gas sensors are mainly divided into solid electrolyte sensors, liquid or semi-liquid electrolytes. Solid electrolyte sensors are severely affected by temperature and humidity and have a high price, so their application fields are limited. Currently, the most widely used are liquid and semi-liquid electrolyte sensors. Such sensors are extremely prone to liquid leakage during storage, transportation, and use, causing serious losses to production and use, etc., and the acid-base electrolyte inside the sensors will also pose a threat to personnel and the environment. In addition, due to the waterproof and breathable membrane at the air inlet of the sensor, if there are problems with non-standard sealing, it will lead to liquid leakage of the sensor structure.

[0003] Therefore, it is necessary to strictly design the sensor structure to improve the liquid leakage problem of the sensor, thereby reducing the liquid leakage risk of the liquid electrochemical sensor. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the above-mentioned disadvantages in the prior art and provide a leak-proof electrochemical gas sensor.

[0005] In order to achieve the above purpose, a leak-proof electrochemical gas sensor of the utility model is as follows:

[0006] The leak-proof electrochemical gas sensor, its main feature is that the sensor includes:

[0007] A lower cover, an upper cover arranged in cooperation with the top of the lower cover, a gas hole is arranged at the central position of the upper cover; and several pins located at the bottom of the sensor.

[0008] Preferably, a convex platform is arranged in a circle around the outermost position of the highest point of the lower cover, and the convex platform is used to prevent the internal components or liquid of the sensor from overflowing.

[0009] Preferably, a welding groove is further provided at the inner edge position of the lower cover, and the welding groove is used to cooperate with the welding line provided on the upper cover to realize the sealing of the sensor.

[0010] Preferably, a concave annular groove is further provided at a position adjacent to the welding groove, and the concave annular groove is used to prevent glue overflow when the welding groove and the welding line are welded and fused.

[0011] Preferably, the welding groove and the welding line adopt one or more welding methods of ultrasonic welding, hot press welding, and glue injection welding.

[0012] Preferably, a concave platform is provided around the bottom periphery of the upper cover, and the concave platform is matched with the convex platform so that the lower cover and the upper cover are closely attached when ultrasonic welding is adopted.

[0013] Preferably, both the lower cover and the upper cover are processed and prepared by using one or more of the materials of ABS, PP, PC, and PA.

[0014] The leak-proof electrochemical gas sensor adopting the present utility model can effectively solve the problem of liquid leakage of the electrochemical gas sensor, and at the same time can enhance the sealing performance of the sensor, improve the test accuracy and the service life of the electrochemical sensor. While greatly reducing the risk of liquid leakage, it can also make the test data more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the external structure of the leak-proof electrochemical gas sensor of the present utility model.

[0016] Figure 2 It is a schematic diagram of the split structure of the upper and lower covers of the leak-proof electrochemical gas sensor of the present utility model.

[0017] Figure 3 It is a sectional view of the split structure of the upper and lower covers of the leak-proof electrochemical gas sensor of the present utility model.

[0018] REFERENCE NUMERALS

[0019] 1 Lower cover

[0020] 101 Convex platform

[0021] 102 Welding groove

[0022] 103 Concave annular groove

[0023] 2 Upper cover

[0024] 201 Concave platform

[0025] 202 Welding line

[0026] 203 Air hole

[0027] 3 pins Specific implementation manner

[0028] In order to more clearly describe the technical content of the present utility model, the following will be further described in conjunction with specific embodiments.

[0029] Before detailing the embodiments according to the present invention, it should be noted that, hereinafter, the terms "comprising", "including" or any other variant are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0030] Please refer to Figures 1 to 3 As shown, the leak-proof electrochemical gas sensor of the present utility model, wherein the sensor comprises:

[0031] A lower cover 1, an upper cover 2 disposed in cooperation with the top of the lower cover 1, a gas hole 203 is provided at the central position of the upper cover 2; and several pins 3 located at the bottom of the sensor.

[0032] As a preferred implementation manner of the present utility model, a boss 101 is provided around the outermost position of the highest point of the lower cover 1, and the boss 101 is used to prevent the internal components or liquid of the sensor from overflowing.

[0033] As a preferred implementation manner of the present utility model, a welding groove 102 is further provided at the inner edge position of the lower cover 1, and the welding groove 102 is used to cooperate with the welding wire 202 provided on the upper cover 2 to achieve the sealing of the sensor.

[0034] As a preferred implementation manner of the present utility model, a concave ring groove 103 is further provided at a position adjacent to the welding groove 102, and the concave ring groove 103 is used to prevent the welding groove 102 and the welding wire 202 from overflowing glue during welding and fusing.

[0035] As a preferred implementation manner of the present utility model, the welding groove 102 and the welding wire 202 adopt one or more welding methods of ultrasonic welding, hot press welding, and glue injection welding.

[0036] As a preferred implementation manner of the present utility model, a concave platform 201 is provided around the periphery of the upper cover 2, and the concave platform 201 is matched with the boss 101 so that the lower cover 1 and the upper cover 2 are closely attached when ultrasonic welding is adopted.

[0037] As a preferred embodiment of the present utility model, the lower cover 1 and the upper cover 2 are both processed and prepared by using one or more of the materials of ABS, PP, PC, and PA.

[0038] In practical applications, such as Figure 1 shown, the leak-proof electrochemical gas sensor includes a lower cover 1, pins 3, and air holes 203; splitting the electrochemical gas sensor into a lower cover 1 and an upper cover 2 facilitates the assembly of the internal components of the sensor. The lower cover 1 and the upper cover 2 are both processed and prepared by using one or more of ABS, PP, PC, and PA. As Figure 2 and Figure 3 shown, the lower cover 1 is provided with a boss 101, a welding groove 102, and a concave ring groove 103; the upper cover 2 is provided with a concave platform 201, a welding line 202, and air holes 203. The boss 101 is the highest point of the lower cover 1, which can prevent the internal components or liquid of the sensor from overflowing. The welding groove 102 and the welding line 202 are designed in a matching manner. During welding, the welding line 202 is inserted into the welding groove 102, and one or more of ultrasonic welding, hot pressing welding, and glue injection welding are used in combination. A large amount of heat is generated by friction and high-frequency vibration between the welding groove 102 and the welding line 202 to melt the two into a whole, so that the sensor achieves a sealing effect. The concave platform 201 and the boss 101 are designed in a matching manner, and they can be closely attached during ultrasonic welding. The design of the concave ring groove 103 is to prevent the phenomenon of glue overflow when the welding groove 102 and the welding line 202 are melted, which can prevent the melted glue from overflowing into the sensor internal, and protect the internal components of the sensor from being affected and damaged. The air holes 203 facilitate the entry and exit of gas, which is convenient for gas detection and testing of the sensor. The boss 101 is higher than the welding groove 102 and the concave ring groove 103, which can further prevent the liquid from overflowing to the surface or pins of the sensor, causing corrosion problems.

[0039] This structural design can effectively solve the leak problem of the electrochemical gas sensor, and at the same time enhance the sealing performance of the sensor, improve the test accuracy and the service life of the electrochemical sensor. At the same time, the pins can be used for electrochemical gas sensors with 2 or more pins, or other solid sensors or other products with higher sealing requirements.

[0040] Adopting the leak-proof electrochemical gas sensor of the present utility model can effectively solve the leak problem of the electrochemical gas sensor, and at the same time enhance the sealing performance of the sensor, improve the test accuracy and the service life of the electrochemical sensor. While greatly reducing the leak risk, it can also make the test data more accurate.

[0041] In this specification, the present utility model has been described with reference to its specific embodiments. However, it is obvious that various modifications and transformations can still be made without departing from the spirit and scope of the present utility model. Therefore, the specification and the drawings should be regarded as illustrative rather than restrictive.

Claims

1. A liquid-leakage-proof electrochemical gas sensor, characterized in that: The sensor comprises: A lower cover (1), an upper cover (2) arranged on the top of the lower cover (1), wherein an air hole (203) is arranged at the center of the upper cover (2); and a plurality of pins (3) located at the bottom of the sensor.

2. The liquid-leakage-proof electrochemical gas sensor according to claim 1, characterized in that: A boss (101) is provided on the outer periphery of the highest point of the lower cover (1), and the boss (101) is used to prevent the internal components or liquid of the sensor from overflowing.

3. The liquid-leakage-proof electrochemical gas sensor according to claim 2, characterized in that: A welding groove (102) is also provided at the inner edge of the lower cover (1), and the welding groove (102) is used to cooperate with the welding line (202) provided on the upper cover (2) to achieve sealing of the sensor.

4. The liquid-leakage-proof electrochemical gas sensor according to claim 3, characterized in that: A concave annular groove (103) is also provided at a position adjacent to the welding groove (102), and the concave annular groove (103) is used to prevent glue overflow from occurring between the welding groove (102) and the welding line (202) during welding and fusing.

5. The liquid-leakage-proof electrochemical gas sensor according to claim 3, characterized in that: The welding groove (102) and the welding line (202) are welded by one or more welding methods selected from ultrasonic welding, hot pressing welding and gluing welding.

6. The liquid-leakage-proof electrochemical gas sensor according to claim 5, characterized in that: A concave platform (201) is arranged around the periphery of the upper cover (2), and the concave platform (201) matches the convex platform (101), so that the lower cover (1) and the upper cover (2) are tightly fitted when ultrasonic welding is adopted.

7. The liquid-leakage-proof electrochemical gas sensor according to claim 1, characterized in that: The lower cover (1) and the upper cover (2) are both made of one or more materials selected from the group consisting of ABS, PP, PC and PA.

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