A gas sensor detection device

Abstract

The utility model relates to sensor detection technical field discloses a kind of gas sensor detection equipment, including fixed frame, fixed frame one end is equipped with gas holder, first gas pipe is in the side wall of gas holder, end portion is equipped with receiving plate, and there is the isolator cover with sealing structure above receiving plate. There is adjusting device in gas holder, including fixed shaft and the first, second adjusting disc of sleeve, both have air hole and the air hole of first adjusting disc is more, and second adjusting disc moves in sliding slot by sliding rod and realizes gas volume adjustment. There is gas mixing chamber above adjusting disc, and it is connected second gas pipe and end portion is connected receiving plate by valve. Receiving plate is modular design, and can be adapted to different sensors. The equipment is accurately controlled by adjusting disc, and sealing structure guarantees that detection environment is stable, and modular receiving plate improves adaptability, and is suitable for accurate detection of various gas sensors.

Description

Technical Field

[0001] This utility model relates to the field of sensor detection equipment technology, and in particular to a gas sensor detection equipment. Background Technology

[0002] With the rapid development of environmental monitoring, industrial safety protection, medical health, and smart home fields, the demand for gas sensors to detect specific gas components is becoming increasingly urgent. Their detection accuracy, response speed, and stability directly determine the scientific nature of safety management and decision-making in these fields. To ensure that gas sensors meet factory performance standards and maintain stable performance during use, it is necessary to use specialized testing equipment to simulate gas environments under different operating conditions to verify and calibrate the sensor's core indicators such as sensitivity, accuracy, and anti-interference capability. Therefore, high-performance gas sensor testing equipment has become a key support for the industry's development.

[0003] In Chinese patent publication CN 112649162 A, the air intake end is connected to the air intake pipe, and the exhaust pipe is matched with the exhaust channel. Combined with a pressure sensor, the sealing performance of the sensor is detected, which improves the accuracy of the sealing performance detection. However, there are still many technical bottlenecks in the core requirement of detecting the low concentration sensing performance of the sensor. On the one hand, the preparation and stable delivery of low-concentration sensing gases are challenging. Existing equipment often relies on a single-ratio dilution structure, making it difficult to precisely control the mixing ratio of sensing gas and dilution gas. Insufficient dilution precision can easily cause the target gas concentration to deviate from the set value, failing to provide a stable gas source for low-concentration detection by the sensor. On the other hand, the lack of a flexible, stepped concentration adjustment mechanism means that most devices can only achieve a fixed concentration or a limited range of concentration output, which is insufficient to cover the performance verification requirements of the sensor at different low-concentration thresholds. This results in a limited detection scenario and an inability to comprehensively evaluate the sensor's low-concentration sensing range. Furthermore, the gas mixing uniformity of existing equipment is insufficient. Some mixing structures are simply designed, and the gas fails to diffuse and mix sufficiently before entering the detection area, easily leading to localized concentration fluctuations. In low-concentration scenarios, these fluctuations have a more significant impact on the detection results, directly reducing the reliability of the sensor's detection accuracy assessment.

[0004] Therefore, developing gas sensor detection equipment with precise concentration control, step-by-step adjustment, and thorough gas mixing functions has become a key direction for solving current industry pain points. Utility Model Content

[0005] The purpose of this invention is to solve the problems existing in the prior art by proposing a gas sensor detection device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A gas sensor detection device includes a fixed frame, one end of which is placed on the ground and the other end of which is provided with a gas storage tank. The gas storage tank has a hollow structure, and a first gas delivery pipe is provided through the side wall of the gas storage tank. A receiving plate is provided at the end of the gas storage tank away from the fixed frame. An isolation cover is provided above the receiving plate. A sealing structure is provided at the connection between the isolation cover and the gas storage tank. An adjustment device is provided inside the gas storage tank. The adjusting device includes a fixed shaft, with a first adjusting plate and a second adjusting plate sequentially sleeved around the outer periphery of the fixed shaft. Both the first and second adjusting plates are provided with vent holes, and the first adjusting plate has more vent holes than the second adjusting plate. A sliding rod is provided on one side of the second adjusting plate, and a groove is provided on the gas storage tank corresponding to the sliding rod. The sliding rod extends to the outside of the gas storage tank through the groove. A mixing chamber is provided above the second adjusting plate, and a second gas supply pipe is connected through the side wall of the mixing chamber. A valve is provided at the end of the mixing chamber away from the second adjusting plate, and the valve is connected to a receiving plate.

[0007] Preferably, a sensor is provided in the mixing chamber, and the sensor is electrically connected to the valve.

[0008] Preferably, the first adjusting plate is provided with a baffle, and the end of the baffle away from the first adjusting plate abuts against the second adjusting plate; and the width of the baffle is greater than the diameter of the vent hole.

[0009] Preferably, the bottom of the gas storage tank is provided with an air intake pipe, one end of which is connected to the gas storage tank and the other end is provided with a micro pump.

[0010] Preferably, the receiving plate and the gas storage tank are detachably connected, and the receiving plate is a modular housing device to accommodate different sensors.

[0011] Preferably, the end of the gas storage tank connected to the isolation cover is provided with an inlay groove, the sealing structure is disposed in the inlay groove, and the inlay groove matches the size of the isolation cover.

[0012] Preferably, a sealing plate is provided at the junction of the isolation cover and the inlay groove, and the sealing plate is adapted to the sealing structure.

[0013] Preferably, the sealing structure is a rubber sealing ring.

[0014] Preferably, the receiving plate has a through hole at the corresponding valve.

[0015] Preferably, the receiving plate is provided with a handle.

[0016] Compared with the prior art, the beneficial effects of this utility model are: This invention utilizes a first gas supply pipe to directionally deliver sensor-sensing gas into a gas storage tank, providing a target gas source for accurate low-concentration sensing by the sensor. A second gas supply pipe specifically delivers diluent gas, creating a dilution effect with the sensing gas delivered by the first gas supply pipe. In the adjustment device, a fixed shaft provides a stable mounting reference for the first and second adjustment discs. By utilizing the difference in the number of vents on the two adjustment discs, a sliding rod moves along a groove, driving the second adjustment disc to rotate relative to the first adjustment disc. This changes the effective flow area before the sensing gas and diluent gas mix. Combined with the diluent gas delivery through the second gas supply pipe, this achieves a step-by-step concentration adjustment of the gas to be sensed from high to low concentrations, covering the entire sensor range. The system provides a stable and controllable concentration environment for the sensor to accurately detect low-concentration gases. The mixing chamber ensures thorough mixing of the adjusted low-concentration gas, guaranteeing uniform gas concentration and preventing localized concentration fluctuations from affecting the detection results. The valve precisely controls the timing of the low-concentration gas entering the detection area above the receiving plate, preventing premature leakage and resulting concentration distortion. Through the synergistic effects of sensing gas delivery, dilution gas assistance, stepped concentration adjustment, and low-concentration gas homogenization, the overall structure provides a stable and controllable concentration environment for the sensor to accurately detect low-concentration gases, effectively supporting the sensor's low-concentration sensing performance and improving reliability in low-concentration detection scenarios. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a gas sensor detection device proposed in this utility model; Figure 2 This is a front view of the overall device of the gas sensor detection equipment proposed in this utility model; Figure 3 This is a top view of the gas storage tank of a gas sensor detection device proposed in this utility model; Figure 4 This is a schematic diagram of the internal structure of the gas storage tank of a gas sensor detection device proposed in this utility model; Figure 5 This is an enlarged schematic diagram of the adjustment device of a gas sensor detection equipment proposed in this utility model; Figure 6 This is an enlarged schematic diagram of the sealing structure of a gas sensor detection device proposed in this utility model.

[0018] In the diagram: 1. Fixing frame; 2. Gas storage tank; 3. First gas supply pipe; 4. Receiving plate; 5. Isolation cover; 6. Sealing structure; 7. Adjusting device; 8. Fixing shaft; 9. First adjusting plate; 10. Second adjusting plate; 11. Vent hole; 12. Sliding rod; 13. Slide groove; 14. Mixing chamber; 15. Second gas supply pipe; 16. Valve; 17. Sensor; 18. Baffle; 19. Intake pipe; 20. Micro pump; 21. Embedding groove; 22. Sealing plate; 23. Through hole; 24. Handle; 25. Sealing ring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figures 1-6 A gas sensor detection device includes a mounting frame 1, one end of which is placed on the ground and the other end of which is equipped with a gas storage tank 2. The gas storage tank 2 has a hollow structure, and a first gas supply pipe 3 is provided through the side wall of the gas storage tank 2. The end of the gas storage tank 2 away from the mounting frame 1 is provided with a receiving plate 4 for placing the sensor to be detected. An isolation cover 5 is provided above the receiving plate 4. A sealing structure 6 is provided at the connection between the isolation cover 5 and the gas storage tank 2. An adjustment device 7 is provided inside the gas storage tank 2. The adjusting device 7 includes a fixed shaft 8, with a first adjusting plate 9 and a second adjusting plate 10 sequentially sleeved around the outer periphery of the fixed shaft 8. Both the first adjusting plate 9 and the second adjusting plate 10 are provided with vent holes 11, and the first adjusting plate 9 has more vent holes 11 than the second adjusting plate 10. A sliding rod 12 is provided on one side of the second adjusting plate 10, and a groove 13 is provided on the gas storage tank 2 corresponding to the sliding rod 12. The sliding rod 12 extends to the outside of the gas storage tank 2 through the groove 13. Optionally, to prevent air leakage at the groove 13, a sealing ring 25 adapted to the outer diameter of the gas storage tank 2 can be installed on the outside of the sliding rod 12. A sealing gasket is provided inside the sealing ring 25, which fits against the outer wall of the gas storage tank 2. A mixing chamber 14 is provided above the second adjusting plate 10. A second gas supply pipe 15 is connected through the side wall of the mixing chamber 14. A valve 16 is provided at the end of the mixing chamber 14 away from the second adjusting plate 10, and the valve 16 is connected to the receiving plate 4.

[0021] In the example of this application, the first gas supply pipe 3 can directionally deliver the sensor-sensing gas into the gas storage tank 2, providing a target gas source for the sensor's accurate low-concentration sensing detection; the second gas supply pipe 15 can specifically deliver dilution gas, forming a dilution combination with the sensing gas delivered by the first gas supply pipe 3; in the adjustment device 7, the fixed shaft 8 provides a stable installation reference for the first adjustment plate 9 and the second adjustment plate 10. By utilizing the difference in the number of vent holes 11 between the two adjustment plates, the second adjustment plate 10 is driven to rotate relative to the first adjustment plate 9 by the movement of the sliding rod 12 along the slide groove 13, which can change the effective flow area before the sensing gas and dilution gas are mixed. Combined with the dilution gas delivery by the second gas supply pipe 15, a stepwise concentration reduction of the gas to be sensed from a higher concentration to a lower concentration is achieved. The temperature adjustment covers the concentration range required for low-concentration sensing detection by the sensor; the mixing chamber 14 can fully mix the adjusted low-concentration gas to be sensed, ensuring gas concentration uniformity and avoiding the impact of local concentration fluctuations on the detection results at low concentrations; the valve 16 can precisely control the timing of the low-concentration gas to be sensed entering the detection area above the receiving plate 4, preventing premature leakage of low-concentration gas and resulting concentration distortion. The overall structure, through the synergistic effect of sensing gas delivery, dilution gas assistance, step-by-step concentration adjustment, and low-concentration gas homogenization, provides a stable and controllable concentration environment for the sensor to accurately sense the gas at low concentrations, effectively supporting the sensor's low-concentration sensing performance detection requirements and improving reliability in low-concentration detection scenarios; Both the first gas pipe 3 and the second gas pipe 15 are connected to an external gas storage device.

[0022] In the example of this application, a sensor 17 is provided in the mixing chamber 14, and the sensor 17 is electrically connected to the valve 16 via a control processor.

[0023] As a preferred example of this utility model, the sensor 17 in the mixing chamber 14 can monitor parameters such as the concentration and pressure of the gas in the mixing chamber 14 in real time (i.e., the sensor 17 uses a gas concentration sensor and a gas pressure sensor). When the gas parameters are detected to meet the preset detection conditions, the sensor 17 can send an electrical signal to the valve 16 through the control processor to control the valve 16 to open automatically, allowing the gas to enter the detection area. When the detection is completed or the gas parameters do not meet the requirements, the sensor 17 controls the valve 16 to close, realizing the automated control of the timing of gas introduction without manual operation, improving the timeliness and accuracy of detection, and reducing errors caused by human intervention.

[0024] In the example of this application, the first adjusting plate 9 is provided with a baffle 18, and the end of the baffle 18 away from the first adjusting plate 9 abuts against the second adjusting plate 10; and the width of the baffle 18 is greater than the diameter of the vent hole 11.

[0025] As a preferred example of this utility model, the baffle 18 on the first adjusting plate 9 abuts against the second adjusting plate 10, and the width of the baffle 18 is greater than the diameter of the vent hole 11. When the second adjusting plate 10 is manually rotated relative to the first adjusting plate 9 by sliding the sliding rod 12, the baffle 18 can accurately block the vent hole 11 on the second adjusting plate 10, ensuring that the unblocked vent hole 11 is the only channel for gas flow, preventing gas from leaking from the gap between the adjusting plates, enhancing the sealing and accuracy of concentration adjustment, making the step difference of gas concentration adjustment more obvious, and further improving the reliability of concentration adjustment.

[0026] In the example of this application, the bottom of the gas storage tank 2 is provided with a suction pipe 19, one end of which is connected to the gas storage tank 2, and the other end is provided with a micro pump 20.

[0027] As a preferred example of this utility model, the suction pipe 19 at the bottom of the gas storage tank 2 works in conjunction with the micro pump 20. After the test is completed, the micro pump 20 can quickly extract the residual gas in the gas storage tank 2, the mixing chamber 14 and related pipelines through the suction pipe 19, which facilitates the replacement of different types of test gases and reduces cross-contamination between different gases. At the same time, before the test, impurities in the gas storage tank 2 can be removed by the suction operation to ensure the cleanliness of the initial test environment, improve the repeatability and accuracy of multiple tests, shorten the preparation time for changing test gases, and improve the efficiency of equipment use.

[0028] In the example of this application, the receiving plate 4 is detachably connected to the gas storage tank 2, and the receiving plate 4 is a modular housing device used to accommodate different sensors.

[0029] As a preferred example of this utility model, the detachable connection between the receiving plate 4 and the gas storage tank 2, combined with the modular design of the receiving plate 4, allows for the replacement of the appropriate receiving plate 4 according to the shape and size of different sensors. This eliminates the need to adjust the overall structure of the equipment, enabling the detection and adaptation of various types of sensors. This significantly improves the versatility and applicability of the equipment, reduces the cost of purchasing multiple devices for detecting different sensors, and facilitates quick replacement, thus improving detection efficiency.

[0030] In the example of this application, the end of the gas storage tank 2 connected to the isolation cover 5 is provided with an inlay groove 21, the sealing structure 6 is disposed in the inlay groove 21, and the inlay groove 21 matches the size of the isolation cover 5.

[0031] As a preferred example of this utility model, the inlay groove 21 on the gas tank 2 can accurately position the isolation cover 5, ensuring that the connection position between the isolation cover 5 and the gas tank 2 is accurate; at the same time, the inlay groove 21 provides a stable installation space for the sealing structure 6, which can prevent the sealing structure 6 from shifting or falling off during equipment use, ensuring the working stability of the sealing structure 6, thereby enhancing the sealing reliability of the connection between the isolation cover 5 and the gas tank 2, and providing a stable gas environment for sensor detection.

[0032] In the example of this application, a sealing plate 22 is provided at the part where the isolation cover 5 connects with the inlay groove 21. The sealing plate 22 is adapted to the sealing structure 6, which is a rubber sealing ring.

[0033] As a preferred example of this utility model, the sealing plate 22 on the isolation cover 5 is adapted to the sealing structure 6 in the inlay groove 21, which can increase the contact area between the isolation cover 5 and the sealing structure 6, so that the sealing structure 6 is uniformly squeezed when the isolation cover 5 is connected to the gas storage tank 2, forming a tighter sealing fit, effectively preventing external gas from entering or internal test gas from leaking, further improving the sealing performance of the connection between the isolation cover 5 and the gas storage tank 2, and reducing the detection error caused by gas leakage. The rubber sealing ring has good elasticity and deformation capacity. When the isolation cover 5 is connected to the gas storage tank 2, the rubber sealing ring can tightly fill the gap between the two through its own deformation to achieve efficient sealing. At the same time, the rubber material has the characteristics of aging resistance and gas corrosion resistance, which can maintain stable sealing performance in long-term use, extend the service life of the sealing structure 6, and reduce the maintenance cost of the equipment.

[0034] In the example of this application, the receiving plate 4 has a through hole 23 at the corresponding valve 16.

[0035] As a preferred example of this utility model, the through hole 23 on the receiving plate 4 is correspondingly set with the valve 16, which can provide a smooth flow path for the test gas output from the mixing chamber 14, ensuring that the test gas accurately reaches the sensor position on the receiving plate 4 through the valve 16 and the through hole 23, so that the sensor can fully contact the test gas, ensuring the accuracy and reliability of the sensor detection data, and avoiding the deviation of the detection results caused by the obstruction of gas flow.

[0036] In the example of this application, the receiving plate 4 is provided with a handle 24.

[0037] As a preferred example of this utility model, the handle 24 on the receiving plate 4 provides a convenient gripping point for the operator, making the installation and disassembly of the receiving plate 4 more labor-saving and convenient, effectively shortening the time for replacing the receiving plate 4, simplifying the operation process of the equipment, and improving the ease of use of the equipment, especially suitable for scenarios that require frequent replacement of different sensors for detection.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A gas sensor detection device, characterized in that: The device includes a fixed frame (1), one end of which is placed on the ground and the other end is equipped with a gas storage tank (2); the gas storage tank (2) has a hollow structure, and a first gas supply pipe (3) is provided through the side wall of the gas storage tank (2), and a receiving plate (4) is provided at the end of the gas storage tank (2) away from the fixed frame (1); an isolation cover (5) is provided above the receiving plate (4), and a sealing structure (6) is provided at the connection between the isolation cover (5) and the gas storage tank (2); and an adjustment device (7) is provided inside the gas storage tank (2). The adjusting device (7) includes a fixed shaft (8), on which a first adjusting plate (9) and a second adjusting plate (10) are sequentially fitted. Both the first adjusting plate (9) and the second adjusting plate (10) are provided with vent holes (11), and the first adjusting plate (9) has more vent holes (11) than the second adjusting plate (10). A sliding rod (12) is provided on one side of the second adjusting plate (10), and a groove (13) is provided on the gas storage tank (2) corresponding to the sliding rod (12). The sliding rod (12) extends to the outside of the gas storage tank (2) through the groove (13). A mixing chamber (14) is provided above the second adjusting plate (10), and a second gas supply pipe (15) is connected through the side wall of the mixing chamber (14). A valve (16) is provided at the end of the mixing chamber (14) away from the second adjusting plate (10), and the valve (16) is connected to the receiving plate (4).

2. The gas sensor detection device according to claim 1, characterized in that, A sensor (17) is installed in the mixing chamber (14), and the sensor (17) is electrically connected to the valve (16).

3. The gas sensor detection device according to claim 1, characterized in that, The first adjusting plate (9) is provided with a baffle (18), and the end of the baffle (18) away from the first adjusting plate (9) abuts against the second adjusting plate (10); and the width of the baffle (18) is greater than the diameter of the vent (11).

4. The gas sensor detection device according to claim 1, characterized in that, The bottom of the gas storage tank (2) is provided with a suction pipe (19), one end of which is connected to the gas storage tank (2), and the other end is provided with a micro pump (20).

5. A gas sensor detection device according to claim 1, characterized in that, The receiving plate (4) is detachably connected to the gas storage tank (2), and the receiving plate (4) is a modular housing device used to accommodate different sensors.

6. A gas sensor detection device according to claim 1, characterized in that, The gas storage tank (2) is connected to the isolation cover (5) at one end with an inlay groove (21), and the sealing structure (6) is set in the inlay groove (21), and the inlay groove (21) matches the size of the isolation cover (5).

7. A gas sensor detection device according to claim 1, characterized in that, A sealing plate (22) is provided at the part where the isolation cover (5) connects with the inlay groove (21), and the sealing plate (22) is adapted to the sealing structure (6).

8. A gas sensor detection device according to claim 1, characterized in that, The sealing structure (6) is a rubber sealing ring.

9. A gas sensor detection device according to claim 1, characterized in that, The receiving plate (4) has a through hole (23) at the corresponding valve (16).

10. A gas sensor detection device according to claim 1, characterized in that, The receiving plate (4) is provided with a handle (24).

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