Electrochemical gas sensor with pin stabilizing structure

Abstract

The utility model relates to an electrochemical gas sensor with a pin stabilizing structure, the sensor comprises a pin (1), a shell (2) and a sealing ring (3), the pin (1) comprises a pin platform (101) and a pin column (102), the pin platform (101) and the pin column (102) are combined at the connecting position through the sealing ring (3), and the pin platform (101) and the pin column (102) are connected through the sealing ring (3). And the pin (1) is of a T-shaped or cross-shaped stable structure, so that the pin (1) is assembled in the shell (2) and is fixed by glue dripping. By adopting the electrochemical gas sensor with the pin stabilizing structure, through the stabilizing structure, the problem that the pins of the gas sensor fall off and are unstable is effectively solved, the sealing performance and the corrosion resistance of the pins are improved, the service life of the gas sensor is prolonged, meanwhile, the sensitivity and the accuracy of the gas sensor are increased, and the gas sensor is suitable for popularization and application. And the risk of liquid leakage at the pin of the electrochemical gas sensor is greatly reduced.

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 an electrochemical gas sensor with a pin stabilizing structure. Background Art

[0002] Electrochemical gas sensors have the characteristics of high sensitivity and fast response rate, and are widely used in fire protection and safety fields such as petroleum, chemical industry, mine, medical treatment, commerce, and household. Gas sensors generally adopt the forms of voltage, potential or current principles. It is necessary to use pins as a bridge to output, display and detect the voltage or current inside the sensor. Therefore, pins are crucial and an important component that the sensor cannot do without.

[0003] However, due to the frequent plugging and unplugging or use of the pins of electrochemical gas sensors, the pins are prone to falling off or being damaged. At the same time, most pins of electrochemical gas sensors are made of metal, and they are prone to react with acids and alkalis and be corroded by electrolytes, resulting in the sensor malfunctioning or even being permanently damaged or failing, causing a large amount of losses to relevant fields such as sensors, instruments, and meters and society. Moreover, the sealing performance at the pins is also a thorny problem. Poor sealing performance will increase the risk of sensor liquid leakage, and the sealed gas will enter and exit from the pins, thus affecting the performance of the sensor such as sensitivity, causing false alarms of the sensor, and seriously affecting its application scope and application value in severe cases.

[0004] Therefore, it is urgent to protect or process the pin part of the gas sensor. By preventing the pins from loosening or falling off, the stability of the sensor pins, the sealing performance at the pins and the corrosion resistance can be improved, and further the service life of the gas sensor can be extended. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the above-mentioned shortcomings in the prior art and provide an electrochemical gas sensor with a pin stabilizing structure.

[0006] In order to achieve the above purpose, an electrochemical gas sensor with a pin stabilizing structure of the utility model is specifically as follows:

[0007] The electrochemical gas sensor with a pin stabilizing structure is mainly characterized in that the sensor includes: pins, a housing and a sealing ring. Among them, the pins include a pin platform and a pin post, the pin platform and the pin post are combined through the sealing ring at the connection position, and the pins are in a "T" - shaped or "cross" - shaped stable structure and are assembled into the housing in this way.

[0008] Preferably, the housing includes a surrounding plate, wherein the surrounding plate is arranged on both sides of the bottom of the housing in a square or semi-circular arc shape, and the length of the shortest side of the surrounding plate is set to be greater than the diameter of the pin platform by 0.5-2 mm, and the height is set to be higher than the pin platform by 1-3 mm, so as to facilitate wrapping the entire pin platform, and the surrounding plate is fixed by using a curing adhesive.

[0009] Preferably, the housing is also provided with a glue hole and a jack, wherein the glue hole is arranged inside the surrounding plate and is the dropping and curing position of the curing adhesive; the jack is arranged at the bottom of the surrounding plate, and the diameter is set to be greater than the diameter of the pin column by 0.1-2 mm, and the distance from the nearest side wall of the housing is 2-8 mm.

[0010] Preferably, a first concave platform is arranged on the upper part of the jack, and the first concave platform is used for placing the sealing ring and preventing the curing adhesive from overflowing to the outside of the housing.

[0011] Preferably, a second concave platform is further arranged on the upper part of the first concave platform. The inner diameter of the sealing ring is the same as that of the pin column, the outer diameter is less than the diameter of the first concave platform by 0.1-2 mm, the thickness of the sealing ring is the same as the height difference between the first concave platform and the second concave platform, and the pin platform is 2-5 mm larger than the diameter of the second concave platform. Thus, the second concave platform fixedly supports the pin platform when the pin is inserted.

[0012] Preferably, the number of the pins is set to be 2 or more, and the numbers of the sealing ring, the curing adhesive, the surrounding plate, the glue hole, the jack, the first concave platform and the second concave platform correspond to the number of the pins.

[0013] Preferably, an air hole is arranged at the top of the housing, and the air hole is used for the required test gas to enter and exit, so as to facilitate the testing and detection of the sensor.

[0014] Preferably, the pin is made of a single metal such as Au, Ag, Cu, Pt, Ni, Fe, Al, Sn, Ti, Ta, or an alloy or coating material of multiple metals.

[0015] Preferably, the housing is composed of one or more plastic parts such as ABS, PC, PP, PA, and PVC.

[0016] Preferably, the sealing ring is one of fluororubber, ethylene propylene diene monomer rubber, acrylate rubber, and chloroprene rubber; the curing adhesive is composed of one or more of instant glue, polyurethane glue, epoxy glue, AB glue, silica gel, UV glue, and hot melt glue.

[0017] The electrochemical gas sensor with a pin stabilization structure adopting the present utility model effectively solves the problem of unstable pin detachment of the gas sensor through this stabilization structure, improves the sealing performance, corrosion resistance at the pins and the service life of the gas sensor. At the same time, it increases the sensitivity and accuracy of the gas sensor and greatly reduces the risk of liquid leakage at the pins of the electrochemical gas sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. is a schematic diagram of the external structure of the electrochemical gas sensor with a pin stabilization structure of the present utility model.

[0019] Figure 2 FIG. is a central structure sectional view of the electrochemical gas sensor with a pin stabilization structure of the present utility model.

[0020] Figure 3 FIG. is a central structure sectional view of the outer shell of the electrochemical gas sensor with a pin stabilization structure of the present utility model.

[0021] Figure 4 FIG. is a schematic diagram of the split structure of the sealing ring and pins of the electrochemical gas sensor with a pin stabilization structure of the present utility model.

[0022] Figure 5 FIG. is a top view of the electrochemical gas sensor with a pin stabilization structure of the present utility model.

[0023] REFERENCE NUMERALS

[0024] 1 Pin

[0025] 101 Pin platform

[0026] 102 Pin post

[0027] 2 Housing

[0028] 201 Enclosure

[0029] 202 Air hole

[0030] 203 Glue hole

[0031] 204 Jack

[0032] 205 First concave platform

[0033] 206 Second concave platform

[0034] 3 Sealing ring

[0035] 4 Curing glue DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] 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.

[0037] 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.

[0038] Please refer to Figures 1 to 5 As shown, the electrochemical gas sensor with a pin stabilizing structure of the present utility model, wherein, the sensor includes: pin 1, housing 2 and sealing ring 3, wherein, the pin 1 includes a pin platform 101 and a pin column 102, the pin platform 101 and the pin column 102 are combined at the connection position through the sealing ring 3, and the pin 1 has a "T" shape or a "cross" shape stable structure and is assembled into the housing 2 in this way.

[0039] As a preferred embodiment of the present utility model, the housing 2 includes a surrounding plate 201, wherein, the surrounding plate 201 is arranged on both sides of the bottom of the housing 2 in a square or semi-circular arc shape, and the length of the shortest side of the surrounding plate 201 is set to be greater than the diameter of the pin platform 101 by 0.5 - 2 mm, and the height is set to be higher than the pin platform 101 by 1 - 3 mm, so as to facilitate wrapping the entire pin platform 101, and the surrounding plate 201 is fixed by using a curing glue 4.

[0040] As a preferred embodiment of the present utility model, a glue hole 203 and a jack 204 are further arranged on the housing 2, wherein, the glue hole 203 is arranged inside the surrounding plate 201 and is the dripping and curing position of the curing glue 4; the jack 204 is arranged at the bottom of the surrounding plate 201, and the diameter is set to be greater than the diameter of the pin column 102 by 0.1 - 2 mm, and the distance from the nearest side housing wall is 2 - 8 mm.

[0041] As a preferred embodiment of the present utility model, a first concave platform 205 is arranged on the upper part of the jack 204, and the first concave platform 205 is used for placing the sealing ring 3 and preventing the curing glue 4 from overflowing to the outside of the housing 2.

[0042] As a preferred embodiment of the present utility model, a second concave platform 206 is further provided on the upper part of the first concave platform 205. The inner diameter of the sealing ring 3 is consistent with that of the pin column 102, and the outer diameter is 0.1 - 2 mm smaller than the diameter of the first concave platform 205. The thickness of the sealing ring 3 is consistent with the height difference between the first concave platform 205 and the second concave platform 206, and the pin platform 101 is 2 - 5 mm larger than the diameter of the second concave platform 206. Thus, the second concave platform 206 fixedly supports the pin platform 101 when the pin 1 is inserted.

[0043] As a preferred embodiment of the present utility model, the number of the pins 1 is set to be 2 or more, and the numbers of the sealing ring 3, the curing glue 4, the surrounding plate 201, the glue holes 203, the jacks 204, the first concave platform 205, and the second concave platform 206 correspond to the number of the pins 1.

[0044] As a preferred embodiment of the present utility model, an air hole 202 is provided at the top of the housing 2. The air hole 202 is used for the required test gas to enter and exit, so as to facilitate the testing and detection of the sensor.

[0045] As a preferred embodiment of the present utility model, the pin 1 is made of a single metal such as Au, Ag, Cu, Pt, Ni, Fe, Al, Sn, Ti, Ta, or an alloy or coating material of multiple metals.

[0046] As a preferred embodiment of the present utility model, the housing 2 is composed of one or a combination of plastic parts such as ABS, PC, PP, PA, and PVC.

[0047] As a preferred embodiment of the present utility model, the sealing ring 3 is one of fluororubber, ethylene propylene diene monomer rubber, acrylate rubber, and chloroprene rubber; the curing glue 4 is composed of one or a combination of instant glue, polyurethane glue, epoxy glue, AB glue, silica gel, UV glue, and hot melt glue.

[0048] Next, the electrochemical gas sensor with a pin stable structure of the present technical solution will be further described in combination with specific structural features:

[0049] The structure of the electrochemical gas sensor includes a pin 1, a housing 2, a sealing ring 3, and a curing glue 4. The pin 1 includes a pin platform 101 and a pin column 102. The pin 1 presents a "T" shape or a "cross" shape, etc., which is convenient for assembling into the sensor. The number of the pins 1 is 2 - 4; the housing 2 includes structural components such as a surrounding plate 201, an air hole 202, a glue hole 203, a jack 204, a first concave platform 205, and a second concave platform 206.

[0050] Pin 1 is one of the metal elements such as Au, Ag, Cu, Pt, Ni, Fe, Al, Sn, Ti, Ta, etc., or an alloy or coating of multiple metals. The housing 2 is a combination of one or more plastic parts such as ABS, PC, PP, PA, PVC, etc. The diameter of the jack 204 is 0.1 - 2 mm larger than the diameter of the pin column 102. The inner diameter of the sealing ring 3 is the same as that of the pin column 102, and the outer diameter is 0.1 - 2 mm smaller than the diameter of the first concave platform 205. The thickness of the sealing ring 3 is the same as the height difference between the first concave platform 205 and the second concave platform 206. And the pin platform 101 is 2 - 5 mm larger in diameter than the second concave platform 206. The comprehensive design facilitates clamping of the pin 1 and the sealing ring 3 at the jack 204, the first concave platform 205, and the second concave platform 206 of the sensor housing, preventing the pin 1 from falling off the sensor housing 2.

[0051] The baffle 201 in the sensor housing 2 is set to be square or semi-circular arc. The length of the shortest side of the baffle 2 is 0.5 - 2 mm larger than the diameter of the pin platform 101, facilitating the enclosure of the entire pin platform 101, positioning the curing glue 4 and preventing its diffusion and flow, and contributing to the forming and curing of the curing glue 4. The air holes 202 are provided to facilitate the entry and exit of the gas to be tested, facilitating sensor testing and detection. The glue hole 203 is the dispensing and curing position of the curing glue 4. The number of the sealing ring 3, the curing glue 4, the baffle 201, the glue hole 203, the jack 204, the first concave platform 205, and the second concave platform 206 corresponds to the number of pins 1. The baffle 201, the glue hole 203, the curing glue 4, and the pin 1 are jointly provided to fix the pin 1, preventing the pin 1 from loosening or falling off due to multiple plugging and unplugging, collision, vibration, or dropping, etc., avoiding damage to the sensor pin 1, and enhancing the sealing performance at the pin 1.

[0052] The distance from the nearest side of the jack 204 to the sensor housing wall is about 2 - 8 mm, and the height of the baffle 201 is about 1 - 3 mm higher than the pin platform 101.

[0053] The curing glue 4 is one or a combination of cyanoacrylate glue, polyurethane glue, epoxy glue, AB glue, silicone glue, UV glue, hot melt glue, etc. After dispensing, brushing, or spraying, it is dried and cured. The drying temperature is 0 - 120 °C, and the drying time is 10 - 300 min, and it has properties such as acid resistance, alkali resistance, and wear resistance.

[0054] Since the pin 1 and the housing 2 are not integral, injection molding not only has high costs but also has the risk of falling off. Therefore, the curing glue 4 is used to fix the pin 1 and the housing 2 into one body. However, to enhance the sealing performance between the two, the sealing ring 3 is respectively sleeved on the connection part of the pin platform 101 and the pin column 102, further enhancing the sealing performance and stability.

[0055] The first concave platform 205 is provided at the upper part of the jack 204, facilitating the placement of the space of the sealing ring 3 and preventing the curing glue 4 from overflowing to the outside of the housing 2 to a certain extent.

[0056] The second concave platform 206 is convenient for abutting against the pin platform 101 to play a supporting role.

[0057] The sealing ring 3 is one of fluororubber, ethylene propylene diene monomer rubber, acrylate rubber, chloroprene rubber, etc.

[0058] The shape of the gas sensor can be cubic or cylindrical, which does not affect the assembly method of the pins 1.

[0059] The setting of the surrounding plate 201 can not only prevent the curing glue 4 from overflowing and control the dispensing amount of the curing glue 4, but also separate other components inside the housing 2 from the pins 1, thereby reducing the risk of the pins 1 falling off due to internal friction of the curing glue 4.

[0060] In a specific embodiment of the present invention, the electrochemical gas sensor with a pin stabilizing structure is assembled as follows:

[0061] Put the rubber ring 3 on the pin 1, and place the pin 1 with the rubber ring on the corresponding jack 204 of the sensor housing 2 respectively. The rubber ring 3 falls to the first concave platform 205, and the pin platform 101 falls to the second concave platform 206. Then use tweezers to flatten the pin 101 platform and place it stably. Then place the housing 2 with the pin 1 on a special tool or mold, suspend the pin 1, and then dispense, spray or brush an appropriate amount of curing glue 4 at the glue hole 203. The amount of the curing glue 4 is flush with the top of the surrounding plate 201. Then place the tool carrying the housing 2 horizontally in a blast drying oven for baking. The drying temperature is 0-120°C, and the drying time is 10-300 minutes. After baking, cool naturally to room temperature. Take out the tool carrying the housing 2 and remove the housing 2 to obtain an electrochemical gas sensor housing component with stable and highly stable pins.

[0062] The electrochemical gas sensor with a pin stabilizing structure of the present utility model effectively solves the problem of unstable pin detachment of the gas sensor through this stabilizing structure, improves the sealing performance, corrosion resistance and service life of the pins, and at the same time increases the sensitivity and accuracy of the gas sensor, and greatly reduces the risk of liquid leakage at the pins of the electrochemical gas sensor.

[0063] 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 drawings should be regarded as illustrative rather than restrictive.

Claims

1. An electrochemical gas sensor with a pin stabilizing structure, characterized in that, The described sensor includes: pins (1), a housing (2), and a sealing ring (3). Among them, the pins (1) include a pin platform (101) and a pin post (102). The pin platform (101) and the pin post (102) are combined at the connection position through the sealing ring (3). The pins (1) are in a "T" - shaped or "cross" - shaped stable structure and are assembled into the housing (2) in this way.

2. The electrochemical gas sensor with a pin stabilization structure according to claim 1, wherein, The described housing (2) includes a surrounding plate (201). Among them, the surrounding plate (201) is arranged on both sides of the bottom of the housing (2) in a square or semi - circular arc shape. And the length of the shortest side of the surrounding plate (201) is set to be greater than the diameter of the pin platform (101) by 0.5 - 2 mm, and the height is set to be higher than the pin platform (101) by 1 - 3 mm, so as to facilitate wrapping the entire pin platform (101), and the surrounding plate (201) is fixed by using a curing adhesive (4).

3. The electrochemical gas sensor with a pin stabilization structure according to claim 2, wherein The housing (2) is also provided with a glue hole (203) and a jack (204). Among them, the glue hole (203) is arranged inside the surrounding plate (201) and is the dripping and curing position of the curing adhesive (4); the jack (204) is arranged at the bottom of the surrounding plate (201), and the diameter is set to be greater than the diameter of the pin post (102) by 0.1 - 2 mm, and the distance from the nearest side housing wall is 2 - 8 mm.

4. The electrochemical gas sensor with a pin stabilizing structure according to claim 3, characterized in that, A first concave platform (205) is arranged on the upper part of the jack (204). The first concave platform (205) is used to place the sealing ring (3) and prevent the curing adhesive (4) from overflowing to the outside of the housing (2).

5. The electrochemical gas sensor with a pin stabilizing structure according to claim 4, wherein, A second concave platform (206) is also arranged on the upper part of the first concave platform (205). The inner diameter of the sealing ring (3) is the same as that of the pin post (102), the outer diameter is less than the diameter of the first concave platform (205) by 0.1 - 2 mm, the thickness of the sealing ring (3) is the same as the height difference between the first concave platform (205) and the second concave platform (206), and the pin platform (101) is 2 - 5 mm larger than the diameter of the second concave platform (206). Thus, the second concave platform (206) fixedly supports the pin platform (101) when the pin (1) is inserted.

6. The electrochemical gas sensor with a pin stabilizing structure according to claim 5, wherein, The number of the pins (1) is set to be 2 or more, and the numbers of the sealing ring (3), the curing adhesive (4), the surrounding plate (201), the glue hole (203), the jack (204), the first concave platform (205), and the second concave platform (206) correspond to the number of the pins (1).

7. The electrochemical gas sensor with a pin stabilizing structure according to claim 1, wherein, An air hole (202) is arranged at the top of the housing (2). The air hole (202) is used for the required test gas to enter and exit, so as to facilitate the testing and detection of the sensor.

8. The electrochemical gas sensor with a pin stabilizing structure according to claim 1, characterized in that, The pins (1) are made of one of the metal elemental materials of Au, Ag, Cu, Pt, Ni, Fe, Al, Sn, Ti, Ta.

9. The electrochemical gas sensor with a pin stabilizing structure according to claim 1, characterized in that, The housing (2) is composed of one of the plastic parts of ABS, PC, PP, PA, PVC.

10. The electrochemical gas sensor with a pin stabilization structure according to claim 2, wherein The described sealing ring (3) is one of fluororubber, ethylene propylene diene monomer rubber, acrylate rubber, and chloroprene rubber; the described curing glue (4) is one of instant glue, polyurethane glue, epoxy glue, AB glue, silica gel, UV glue, and hot melt glue.

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