Hydrogen concentration calibration tool

Abstract

The utility model discloses a hydrogen concentration calibration tool, and belongs to the technical field of calibration testing of gas sensors. According to the device, the sensing element of the sensor is embedded in the containing hole, then hydrogen is introduced into the containing hole through the gas inlet channel, the sensor can detect the concentration of the hydrogen, the detected hydrogen can be exhausted out of the containing hole through the gas exhaust channel, and by means of the device, when the hydrogen concentration needs to be switched, less hydrogen is wasted. The sensor is clamped by a clamping assembly, so that the position of the sensor is not easy to deviate if the sensor is collided by external force in the gas concentration detection process.

Description

Technical Field

[0001] This application relates to the technical field of calibration testing of gas sensors, and particularly to a hydrogen concentration calibration tooling. Background Art

[0002] Calibration mainly refers to using standard measuring instruments to detect whether the accuracy (precision) of the instruments used meets the standards, and it is generally used for instruments with high precision. When calibrating the hydrogen concentration, it is necessary to introduce hydrogen into the sensitive element of the hydrogen sensor, and then compare the value detected by the hydrogen sensor with the standard value.

[0003] In the prior art, the hydrogen sensor as a whole is usually placed in a closed box for calibration, and a large amount of hydrogen is wasted when switching the hydrogen concentration. Utility Model Content

[0004] The purpose of this application is to propose a hydrogen concentration calibration tooling for the above problems existing in the prior art.

[0005] This application can be realized by the following technical solutions: A hydrogen concentration calibration tooling includes a mounting base and a clamping assembly. A receiving hole is provided on the mounting base, and the receiving hole is used for embedding the sensitive element of a sensor. An air inlet channel and an exhaust channel are penetratingly provided on the mounting base, and both the air inlet channel and the exhaust channel communicate with the inside of the receiving hole; the clamping assembly is used for clamping the sensor.

[0006] In the above technical solution, the sensitive element of the sensor is embedded in the receiving hole, and then hydrogen is introduced into the receiving hole through the air inlet channel. The sensor can detect the concentration of hydrogen, and the hydrogen after the detection is completed can be discharged from the receiving hole through the exhaust channel. When using this device, when it is necessary to switch the hydrogen concentration, less hydrogen is wasted. The sensor is clamped by a clamping assembly so that the position of the sensor is not easily displaced if it is subjected to an external force collision during the process of detecting the gas concentration.

[0007] Further, the clamping assembly includes a mounting frame and a pressing block. The mounting frame is mounted on the mounting base; the pressing block is threadedly connected to the mounting frame, and the pressing block can contact the sensor; wherein, several mounting frames and pressing blocks are provided, and several mounting frames and pressing blocks are evenly distributed on both sides of the sensor.

[0008] In the above technical solution, rotate the pressing block so that the pressing block presses against the outer wall of the sensor, and several pressing blocks can be operated in this way to clamp the sensor.

[0009] Further, a sealing ring is installed on the inner wall of the receiving hole, and the inner ring of the sealing ring can fit against the outer wall of the sensitive element.

[0010] In the above technical solution, the inner ring of the sealing ring can fit against the outer wall of the sensitive element, thereby improving the sealing performance when the sensitive element is embedded in the accommodation hole.

[0011] Further, the sealing ring is adhesively fixed to the inner wall of the accommodation hole by a detachable adhesive.

[0012] In the above technical solution, the sealing ring is usually made of rubber material. After being used for a period of time, the sealing ring will age, which will affect the sealing performance when the sensitive element is embedded in the accommodation hole. When the sealing ring needs to be replaced, the sealing ring can be directly torn off, which is more convenient. Using a detachable adhesive to bond the sealing ring to the accommodation hole, the detachable adhesive is not likely to remain on the inner wall of the accommodation hole after the sealing ring is torn off, which is even more convenient.

[0013] Further, the distance between the ends of the air inlet channel and the air outlet channel that are both far from the accommodation hole is greater than the distance between the ends of the air inlet channel and the air outlet channel that are both close to the accommodation hole.

[0014] In the above technical solution, when the air inlet channel and the air outlet channel communicate with the same gas storage tank, this design can reduce the mutual interference between the air inlet and the air outlet, thereby ensuring that the gas detected by the sensitive element is fresh.

[0015] Further, a placement platform is formed on the mounting base, and the placement platform can support the sensor when the sensitive element is embedded in the accommodation hole.

[0016] In the above technical solution, the placement platform can support the sensor so that the sensor is horizontally placed as a whole, and the fixing effect on the sensor is better.

[0017] Further, the mounting base includes a ventilation seat provided with an air inlet channel and an air outlet channel, a placement seat provided with the accommodation hole and detachably connected to the ventilation seat, and a support seat formed with the placement platform and detachably connected to the placement seat.

[0018] In the above technical solution, the ventilation seat, the placement seat and the support seat can be processed separately first, and then the ventilation seat, the placement seat and the support seat are assembled, which is convenient for processing.

[0019] Further, the sealing ring is exposed outside the accommodation hole.

[0020] In the above technical solution, the sealing ring can be exposed outside the accommodation hole, and this design is more convenient for workers to tear off the sealing ring.

[0021] In summary, the present application has the following technical effects: The sensitive element of the sensor is embedded in the accommodation hole, and then hydrogen gas is introduced into the accommodation hole through the air inlet channel. The sensor can detect the concentration of hydrogen gas, and the detected hydrogen gas can be discharged from the accommodation hole through the exhaust channel. When using this device, when it is necessary to switch the hydrogen concentration, less hydrogen gas is wasted. The sensor is clamped by a clamping assembly so that the position of the sensor is not easily displaced if it is subjected to an external force collision during the gas concentration detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the present application;

[0023] Figure 2 is a schematic diagram of the position of the penetration hole in the present application;

[0024] Figure 3 is a schematic diagram of another perspective of the overall structure of the present application.

[0025] Description of the Reference Numerals:

[0026] 1. Mounting base; 11. Accommodation hole; 12. Air inlet channel; 13. Exhaust channel; 14. Placement platform; 15. Ventilation seat; 151. Penetration hole; 16. Placement seat; 17. Support seat; 2. Sensor; 21. Sensitive element; 3. Clamping assembly; 31. Mounting frame; 32. Tightening block; 4. Sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Please refer to FIGS. Figure 1 and Figure 2 of the specification drawings. An embodiment of the present application provides a hydrogen concentration calibration tooling, which includes a mounting base 1. The mounting base 1 includes a ventilation seat 15. An air inlet channel 12 and an exhaust channel 13 are penetrated through the ventilation seat 15. A placement seat 16 is detachably installed on the ventilation seat 15. An accommodation hole 11 with a side opening is formed on the placement seat 16. A penetration hole 151 is penetrated through the bottom of the accommodation hole 11 on the placement seat 16. Both the exhaust channel 13 and the air inlet channel 12 are communicated with the inside of the accommodation hole 11 through the penetration hole 151. The air inlet channel 12 is used for supplying hydrogen gas into the accommodation hole 11, and the exhaust channel 13 is used for discharging the detected hydrogen gas from the accommodation hole 11. One end of the placement seat 16 near the opening of the accommodation hole 11 is provided with a support seat 17. A placement platform 14 is formed on the support seat 17. A sensor 2 is placed on the placement platform 14. The sensor 2 is a hydrogen concentration sensor. The sensor 2 has a sensitive element 21. After the sensor 2 is placed on the placement platform 14, the sensor 2 is pushed horizontally and linearly, and the sensitive element 21 can be embedded into the accommodation hole 11. The placement platform 14 can support the sensor 2. The sensor 2 is clamped by a clamping assembly 3 so that the position of the sensor 2 is not easily displaced if it is subjected to an external force collision during the gas concentration detection process.

[0028] Please refer to the Figure 1 , the clamping assembly 3 includes two mounting brackets 31 detachably mounted on the supporting base 17. The two mounting brackets 31 can be located on both sides of the sensor 2 in a one-to-one correspondence. A pressing block 32 is threadedly connected to each of the two mounting brackets 31. The pressing blocks 32 are placed horizontally and can be manually rotated to adjust the distance between their ends and the sensor 2. The two pressing blocks 32 can abut against the outer wall of the sensor 2 to clamp the sensor 2.

[0029] Please refer to the Figure 1 , a sealing ring 4 is adhesively bonded to the inner wall in the depth direction of the accommodation hole 11 by a tearable adhesive. The sensitive element 21 is approximately cylindrical, and the axial outer wall of the sensitive element 21 can fit against the inner ring of the sealing ring 4, thereby improving the sealing performance when the sensitive element 21 is embedded in the accommodation hole 11. The sealing ring 4 is made of rubber, and the tearable adhesive can be a nano-traceless double-sided adhesive. After the sealing ring 4 is used for a period of time, it will age and affect the sealing effect. The sealing ring 4 is adhesively bonded to the inner wall of the accommodation hole 11 by the tearable adhesive, which is convenient for tearing off the sealing ring 4 and replacing it with a new one. And one end of the sealing ring 4 can be exposed at the opening of the accommodation hole 11, which is convenient for workers to tear off the sealing ring 4.

[0030] Please refer to the Figure 3 , the distance between the ends of the air inlet channel 12 and the air outlet channel 13 that are both far from the accommodation hole 11 is greater than the distance between the ends of the air inlet channel 12 and the air outlet channel 13 that are both close to the accommodation hole 11. When the air inlet channel 12 and the air outlet channel 13 communicate with the same gas storage tank, this design can reduce the mutual interference between air intake and air outlet, thereby ensuring that the gas detected by the sensitive element 21 is fresh.

[0031] Working principle of this embodiment: Embed the sensitive element 21 in the accommodation hole 11, rotate the pressing blocks 32 to clamp the sensor 2 with the two pressing blocks 32, and introduce hydrogen into the accommodation hole 11 through the air inlet channel 12, then the sensor 2 can detect the hydrogen concentration in the accommodation hole 11.

[0032] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A hydrogen concentration calibration tooling, characterized in that, Comprising: A mounting base (1), in which a receiving hole (11) is formed. The receiving hole (11) is used for embedding a sensitive element (21) of a sensor (2). The mounting base (1) is provided with an intake channel (12) and an exhaust channel (13) penetrating therethrough, and both the intake channel (12) and the exhaust channel (13) communicate with the inside of the receiving hole (11); A clamping assembly (3) for clamping the sensor (2).

2. The hydrogen concentration calibration tooling according to claim 1, wherein The clamping assembly (3) includes: A mounting frame (31) mounted on the mounting base (1); A pressing block (32) threadedly connected to the mounting frame (31), and the pressing block (32) can contact the sensor (2); Wherein, a plurality of the mounting frames (31) and pressing blocks (32) are provided, and the plurality of mounting frames (31) and pressing blocks (32) are evenly distributed on both sides of the sensor (2).

3. A hydrogen concentration calibration tooling according to claim 1, characterized in that, A sealing ring (4) is mounted on the inner wall of the receiving hole (11), and the inner ring of the sealing ring (4) can fit against the outer wall of the sensitive element (21).

4. A hydrogen concentration calibration tooling according to claim 3, characterized in that The sealing ring (4) is adhesively fixed to the inner wall of the receiving hole (11) by a tearable adhesive.

5. A hydrogen concentration calibration tooling according to claim 1, characterized in that, The distance between the ends of the intake channel (12) and the exhaust channel (13) that are far from the receiving hole (11) is greater than the distance between the ends of the intake channel (12) and the exhaust channel that are close to the receiving hole (11).

6. The hydrogen concentration calibration tooling according to claim 1, characterized in that, A placement platform (14) is formed on the mounting base (1), and when the sensitive element (21) is embedded in the receiving hole (11), the placement platform (14) can support the sensor (2).

7. A hydrogen concentration calibration tooling according to claim 6, characterized in that, The mounting base (1) includes a ventilation base (15) provided with an intake channel (12) and an exhaust channel (13), a placement base (16) provided with the receiving hole (11) and detachably connected to the ventilation base (15), and a supporting base (17) formed with the placement platform (14) and detachably connected to the placement base (16).

8. A hydrogen concentration calibration tooling according to claim 3, characterized in that, The sealing ring (4) is exposed outside the receiving hole (11).

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