Poison gas detection device

Abstract

The invention discloses a poison gas detection device, and relates to the poison gas detection field, the poison gas detection device comprises a host, the host is internally provided with an air inlet channel and an air outlet channel, the air inlet channel and the air outlet channel are mutually communicated and are used for air circulation, the side surface of the host is also provided with an insertion port, and a plug-in detection module is detachably inserted in the insertion port; the plug-in detection module comprises a poison gas detection box, a through opening is formed in the side face of the poison gas detection box, a fixed detection plate and a movable detection plate are installed in the through opening, electrochemical sensors are embedded in the sides, close to each other, of the fixed detection plate and the movable detection plate, and a driving mechanism capable of controlling the movable detection plate to rotate is further arranged in the poison gas detection box. According to the invention, the form of the ventilation gap between the movable detection plate and the fixed detection plate can be automatically adjusted and changed when the air velocity between the fixed detection plate and the movable detection plate is too high, so that the relative stability of the air velocity between the fixed detection plate and the movable detection plate is ensured, and the detection accuracy of toxic gas is ensured.

Description

Technical Field

[0001] The present invention relates to the field of poison gas detection, and in particular to a poison gas detection device. Background Art

[0002] As is known, toxic gas detection devices are mainly used in industrial safety, environmental monitoring, emergency response and other fields. Their core function is to quickly and accurately identify the presence and concentration of specific toxic gases in the environment, providing a key basis for safe evacuation of personnel, pollution control and accident handling.

[0003] At present, the mainstream toxic gas detection devices on the market are mainly based on electrochemical, optical (such as infrared, ultraviolet) or semiconductor sensing principles. However, the conventional fixed or integrated gas detection devices in the existing technology usually permanently integrate specific gas sensors into the host. This design leads to a high degree of functional solidification of the device. When different target gases need to be detected, or when the built-in sensor reaches the end of its service life or fails due to contamination or poisoning, users often need to replace or repair the entire device, or at least require professionals to perform complex host disassembly and sensor replacement operations, which greatly limits the application scope of a single device. Users need to purchase multiple devices for different detection needs. The need for dedicated equipment significantly increases the purchase cost, maintenance cost and difficulty of warehouse management. In addition, the fixed-structure detection chamber commonly used in existing detection devices (such as a channel composed of two parallel fixed detection plates) has a fixed and immutable gap (or channel) for gas circulation. When external environmental factors (such as changes in on-site wind speed, fluctuations in sampling pump power, start-up and shutdown of the ventilation system, etc.) cause the gas flow rate entering the detection chamber to be too large or fluctuate violently, it is easy to occur in an unstable airflow environment, and the accuracy, repeatability and reliability of gas detection will be significantly reduced, which may cause false alarms, missed alarms or concentration reading deviations, seriously threatening personnel safety and decision-making accuracy. Summary of the Invention

[0004] (1) Purpose of the invention

[0005] In view of this, the purpose of the present invention is to provide a toxic gas detection device, in which the shape of the ventilation gap between the movable detection plate and the fixed detection plate can be automatically adjusted and changed when the air flow rate between the fixed detection plate and the movable detection plate is too large, thereby ensuring that the air flow rate between the fixed detection plate and the movable detection plate is relatively stable, thereby ensuring the accuracy of toxic gas detection.

[0006] (2) Technical solution

[0007] To achieve the above technical objectives, the present invention provides a poison gas detection device for use in poison gas detection, comprising a main unit having a walking chassis, an image acquisition camera mounted above the main unit, an air inlet and an air outlet disposed within the main unit, the air inlet and the air outlet being interconnected for air circulation, and a plug-in detection module detachably mounted on a side of the main unit;

[0008] In which, the plug-in detection module includes a gas detection box, and a through hole is opened on the side of the gas detection box, which coincides with the gas detection box so that air can pass through the through hole. A fixed detection plate and a movable detection plate are installed inside the through hole, and electrochemical sensors are embedded on the side of the fixed detection plate close to the movable detection plate. The gas detection box is also provided with a driving mechanism that can control the rotation of the movable detection plate, so that the ventilation gap shape between the movable detection plate and the fixed detection plate can be automatically adjusted and changed according to the wind speed of the air passing through the fixed detection plate and the movable detection plate.

[0009] As a further description of the above technical solution: there are two groups of movable detection plates installed, and the two groups of movable detection plates are symmetrically distributed on the upper and lower sides of the fixed detection plate. An end plate is installed on one side of the through opening, and the middle positions of the two ends of the movable detection plate are rotatably installed between the inner wall of the through opening and the end plate through the driven shaft and the bearing. A mounting groove is provided on the end plate at the mounting position of the driven shaft, and there is a gap between the inner wall of the mounting groove and the end of the driven shaft. A cam 2 is provided on the inner wall of the mounting groove at the gap, and a cam 1 is installed on the driven shaft. A spring is connected between the cam 2 and the cam 1, and the spring enables the movable detection plate to be in a horizontal position in a natural state.

[0010] As a further description of the above technical solution: the driving mechanism includes a driving shaft rotatably mounted on the end plate, one end of the driving shaft extends between the fixed detection plate and the movable detection plate, and is equipped with a blade, and the other end of the driving shaft is rotatably mounted on the end plate through a bearing, and the interior of the end plate is located outside the driving shaft and is also provided with an outer rotating sleeve rotatably through a bearing, and the outer rotating sleeve is connected to the convex shaft through a traction wire, so that the outer rotating sleeve can pull the spring to contract when rotating, so that the movable detection plate rotates, and a movable connection component is installed between the driving shaft and the outer rotating sleeve, through which when the rotation speed of the driving shaft is lower than or equal to the set threshold, no transmission occurs between the driving shaft and the outer rotating sleeve, and when the rotation speed of the driving shaft is higher than the set threshold, transmission occurs between the driving shaft and the outer rotating sleeve.

[0011] As a further description of the above technical solution: the movable connection assembly includes a friction plate and a tension spring, wherein there is a gap between the friction plate and the drive shaft, and the tension spring is installed in the gap between the friction plate and the drive shaft and is located at the center position of the friction plate to connect the friction plate to the drive shaft.

[0012] As a further description of the above technical solution: the movable connection assembly also includes a sleeve and a limit rod, wherein the sleeve adopts a hollow cylindrical structure and is installed on the inner side of the friction plate, the limit rod adopts a rod-shaped structure and is fixed on the surface of the drive shaft, the limit rod and the sleeve are in the same straight line, and the limit rod is movably inserted in the sleeve.

[0013] As a further description of the above technical solution: It is characterized in that the friction plate adopts an arc-shaped structure, so that the friction plate can fit with the inner wall of the outer rotating sleeve when it moves outward and contacts the inner wall of the outer rotating sleeve, and there are multiple friction plates, and the multiple friction plates are distributed on the outside of the drive shaft in a circular array with the central axis of the drive shaft as the reference axis.

[0014] As a further description of the above technical solution: an impeller groove with a semicircular cross-section is opened on the end surface of the fixed detection plate, and the axis of the impeller groove coincides with the axis of the drive shaft.

[0015] As a further description of the above technical solution: a power control room is opened above the poison gas detection box, a power supply is installed inside the power control room, and the power supply is electrically connected to the electrochemical sensor.

[0016] As a further description of the above technical solution: the air inlet duct and the air outlet duct are interconnected to form an L-shaped channel structure, and an induced draft fan is installed at the front end of the air outlet duct.

[0017] As a further description of the above technical solution: the host is provided with a plurality of plug-in ports, each of which can be plugged into a plug-in detection module.

[0018] In the above technical solution, the present invention provides a poison gas detection device, in which a plug-in detection module for detecting poisonous gas adopts a modular design and can be detachably inserted into a host. Therefore, the plug-in detection module can be replaced according to actual testing needs, thereby improving the applicability of the device. In addition, the fixed detection plate and the movable detection plate of the detection element inside the plug-in detection module for detecting poisonous gas in the device adopt a combination of fixed and movable methods, and a driving mechanism capable of controlling the rotation of the movable detection plate is provided inside the poison gas detection box, so that the ventilation gap shape between the movable detection plate and the fixed detection plate can be automatically adjusted and changed when the air flow rate between the fixed detection plate and the movable detection plate is too large, thereby ensuring that the air flow rate between the fixed detection plate and the movable detection plate is relatively stable, and ensuring the accuracy of toxic gas detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the overall structure of a poison gas detection device provided by the present invention;

[0021] Figure 2 A schematic diagram of the internal structure of a host in a poison gas detection device provided by the present invention;

[0022] Figure 3 This is a schematic diagram of the overall structure of a plug-in detection module in a poison gas detection device provided by the present invention;

[0023] Figure 4 A schematic structural diagram of a plug-in detection module in a poison gas detection device provided by the present invention from another perspective;

[0024] Figure 5 A schematic diagram of the internal structure of a plug-in detection module in a poison gas detection device provided by the present invention;

[0025] Figure 6 A schematic diagram of the installation structure of a movable detection plate and a fixed detection plate in a poison gas detection device provided by the present invention;

[0026] Figure 7 A schematic diagram of the installation structure of the movable detection plate and the fixed detection plate in the poison gas detection device provided by the present invention from another perspective;

[0027] Figure 8A schematic diagram of the installation structure of a driving mechanism in a poison gas detection device provided by the present invention;

[0028] Figure 9 This is a schematic diagram of the connection structure between the driven shaft and the outer rotating sleeve in a poison gas detection device provided by the present invention;

[0029] Figure 10 This is a schematic diagram of the transmission structure of the driven shaft and the driving shaft in a poison gas detection device provided by the present invention.

[0030] Description of the drawings: 1. Main unit; 10. Air inlet duct; 11. Air outlet duct; 12. Draft fan; 13. Plug-in port; 2. Walking chassis; 3. Image acquisition camera; 4. Plug-in detection module; 40. Poison gas detection box; 400. Power control room; 401. Through port; 402. Hand slot; 41. Fixed detection plate; 412. Impeller slot; 42. Movable detection plate; 420. Driven shaft; 421. Protruding shaft 1; 43. End plate; 430. Mounting slot; 431. Protruding shaft 2; 44. Drive shaft; 440. Blade; 441. Outer rotating sleeve; 442. Traction wire; 443. Friction plate; 444. Sleeve; 445. Limit rod; 446. Tension spring; 45. Power supply; 46. Electrochemical sensor; 47. Spring. DETAILED DESCRIPTION

[0031] The following description is merely illustrative in nature and is not intended to limit the present disclosure, its applications, or uses. It should be understood that throughout the drawings, identical or similar reference numerals indicate identical or similar parts and features. The drawings merely schematically illustrate the concepts and principles of the embodiments of the present disclosure and do not necessarily depict the specific dimensions and proportions of the various embodiments of the present disclosure. Certain portions of certain drawings may be exaggerated to illustrate relevant details or structures of the embodiments of the present disclosure.

[0032] like Figure 1 - Figure 10 As shown: This embodiment provides a technical solution: a poison gas detection device, including a main unit 1 having a walking chassis 2, an image acquisition camera 3 is installed above the main unit 1, an air inlet duct 10 and an air outlet duct 11 are provided inside the main unit 1, and the air inlet duct 10 and the air outlet duct 11 are interconnected for air circulation, and a plug-in detection module 4 is detachably installed on the side of the main unit 1;

[0033] The pluggable detection module 4 includes a gas detection box 40. A through hole 401 is provided on the side of the gas detection box 40. The through hole 401 coincides with the gas detection box 40, allowing air to pass through the through hole 401. A fixed detection plate 41 and a movable detection plate 42 are installed inside the through hole 401. Electrochemical sensors 46 are embedded on the sides of the fixed detection plate 41 and the movable detection plate 42 that are close to each other. A drive mechanism capable of controlling the rotation of the movable detection plate 42 is also provided inside the gas detection box 40, so that the ventilation gap between the movable detection plate 42 and the fixed detection plate 41 can be automatically adjusted according to the wind speed of the air passing between the fixed detection plate 41 and the movable detection plate 42.

[0034] Working principle: The device adopts vehicle-mounted robot control, that is, the movement control of the main unit 1 is achieved through remote control in conjunction with the walking chassis 2, so that the main unit 1 is moved to a special environmental location for toxic gas detection. During the movement of the device, air enters through the air inlet duct 10 and is discharged from the air outlet duct 11. During this process, the air will pass through the opening 401 inside the plug-in detection module 4. When the air flows between the fixed detection plate 41 and the movable detection plate 42 inside the opening 401, the electrochemical sensors 46 on the fixed detection plate 41 and the movable detection plate 42 react with the toxic gases in the air (such as CO, H2S, O2, Cl2, SO2, NH3 and other toxic gases), thereby realizing the detection of toxic gases;

[0035] In summary, the plug-in detection module 4 for detecting toxic gases in the device adopts a modular design and can be detachably inserted into the host 1. Therefore, the plug-in detection module 4 can be replaced according to actual test needs, which improves the applicability of the device. In addition, the detection elements inside the plug-in detection module 4 for detecting toxic gases in the device adopt a fixed detection plate 41 and a movable detection plate 42 that are combined with fixed and movable detection plates, and a driving mechanism that can control the rotation of the movable detection plate 42 is provided inside the toxic gas detection box 40, so that the ventilation gap shape between the movable detection plate 42 and the fixed detection plate 41 can automatically adjust and change when the air flow rate between the fixed detection plate 41 and the movable detection plate 42 is too large, thereby ensuring that the air flow rate between the fixed detection plate 41 and the movable detection plate 42 is relatively stable, thereby ensuring the accuracy of toxic gas detection.

[0036] Specifically, such as Figure 4 - Figure 8As shown, in order to improve the accuracy of toxic gas detection, in this embodiment, there are two groups of movable detection plates 42 installed, and the two groups of movable detection plates 42 are symmetrically distributed on the upper and lower sides of the fixed detection plate 41. An end plate 43 is installed on one side of the through-port 401. The middle positions of the two ends of the movable detection plates 42 are rotatably installed between the inner wall of the through-port 401 and the end plates 43 through the driven shaft 420 and the bearing. A mounting groove 430 is provided on the end plate 43 at the mounting position of the driven shaft 420. There is a gap between the inner wall of the mounting groove 430 and the end of the driven shaft 420. A cam 2 431 is provided on the inner wall of the mounting groove 430 at the gap. A cam 1 421 is installed on the driven shaft 420. A spring 47 is connected between the cam 2 431 and the cam 1 421. The spring 47 enables the movable detection plate 42 to be in a horizontal position in a natural state. Based on this, when the through-port 401 When the speed of the internal air flow is lower than or equal to the set threshold, the movable detection plate 42 can maintain a horizontal position under the elastic support of the spring 47. At this time, the movable detection plate 42 is parallel to the fixed detection plate 41, and the gap between the movable detection plate 42 and the fixed detection plate 41 is a horizontal three-dimensional space. When the speed of the air flow inside the opening 401 is higher than the set threshold, the movable detection plate 42 can rotate under the drive of the driving mechanism, so that an angle is formed between the movable detection plate 42 and the fixed detection plate 41. At this time, the gap between the movable detection plate 42 and the fixed detection plate 41 is a trumpet-shaped space with a larger front opening and a smaller end opening. This can reduce the flow rate of air between the movable detection plate 42 and the fixed detection plate 41, so that the air can fully react with the electrochemical sensors 46 on the fixed detection plate 41 and the movable detection plate 42, thereby ensuring the accuracy of toxic gas detection.

[0037] Specifically, such as Figure 3 - Figure 10 As shown, in order to enable the movable detection plate 42 to rotate and adjust the angle when the air flow rate between the fixed detection plate 41 and the movable detection plate 42 exceeds the threshold, in this embodiment, the driving mechanism includes a driving shaft 44 rotatably mounted on the end plate 43, one end of the driving shaft 44 extends between the fixed detection plate 41 and the movable detection plate 42 and is equipped with a blade 440, and the other end of the driving shaft 44 is rotatably mounted on the end plate 43 through a bearing, and the inner part of the end plate 43 is located outside the driving shaft 44 and is also rotatably provided with an outer rotating sleeve 441 through a bearing. 41 is connected to the convex shaft 421 through a traction wire 442, so that the outer rotating sleeve 441 can pull the spring 47 to contract when rotating, so that the movable detection plate 42 rotates. A movable connection component is installed between the driving shaft 44 and the outer rotating sleeve 441. Through the movable connection component, when the rotation speed of the driving shaft 44 is lower than or equal to the set threshold, no transmission occurs between the driving shaft 44 and the outer rotating sleeve 441. When the rotation speed of the driving shaft 44 is higher than the set threshold, transmission occurs between the driving shaft 44 and the outer rotating sleeve 441, thereby realizing the rotation control of the movable detection plate 42.

[0038] Specifically, such as Figure 3 - Figure 10 As shown, in order to achieve rotation control of the movable detection plate 42, in this embodiment, the movable connection assembly includes a friction plate 443 and a tension spring 446, wherein there is a gap between the friction plate 443 and the drive shaft 44, and the tension spring 446 is installed in the gap between the friction plate 443 and the drive shaft 44, and is located at the center position of the friction plate 443, connecting the friction plate 443 with the drive shaft 44. Based on this, when the speed of the drive shaft 44 is lower than or equal to the set threshold, the centrifugal force exerted on the friction plate 443 is insufficient to make it contact with the outer rotating sleeve 441. At this time, no transmission occurs between the drive shaft 44 and the outer rotating sleeve 441. When the speed of the drive shaft 44 is higher than the set threshold, the friction plate 443 contacts the outer rotating sleeve 441 under the action of centrifugal force. At this time, transmission occurs between the drive shaft 44 and the outer rotating sleeve 441, thereby causing the outer rotating sleeve 441 to rotate, and pulling the movable detection plate 42 to rotate through the traction wire 442.

[0039] like Figure 3 - Figure 10 As shown, in order to make the outer rotating sleeve 441 more stable when it moves outward under centrifugal force, in this embodiment, the movable connection assembly also includes a sleeve 444 and a limiting rod 445, wherein the sleeve 444 adopts a hollow cylindrical structure and is installed on the inner side of the friction plate 443, and the limiting rod 445 adopts a rod-shaped structure and is fixed on the surface of the drive shaft 44, and the limiting rod 445 and the sleeve 444 are on the same straight line. The limiting rod 445 is movably inserted in the sleeve 444, so that the outer rotating sleeve 441 is limited by the sleeve 444 and the limiting rod 445 when it moves outward under centrifugal force, and the movement is more stable, thereby ensuring the stability of the friction plate 443 during transmission.

[0040] Specifically, such as Figure 3 - Figure 10 As shown, in order to improve the transmission effect between the drive shaft 44 and the outer rotating sleeve 441, in this embodiment, the friction plate 443 adopts an arc-shaped structure, so that when the friction plate 443 moves outward and contacts the inner wall of the outer rotating sleeve 441, it can fit with the inner wall of the outer rotating sleeve 441, thereby making the transmission effect between the drive shaft 44 and the outer rotating sleeve 441 better, and there are a plurality of friction plates 443, and the plurality of friction plates 443 are distributed on the outside of the drive shaft 44 in a circular array with the central axis of the drive shaft 44 as the reference axis, so that the device can further improve the transmission effect between the drive shaft 44 and the outer rotating sleeve 441.

[0041] Specifically, such as Figure 8As shown, in order to enable the force exerted by the air on the blades 440 when flowing between the fixed detection plate 41 and the movable detection plate 42 to enable the drive shaft 44 to always rotate in the same direction, in this embodiment, the end face of the fixed detection plate 41 is provided with an impeller groove 412 with a semicircular cross-section, and the axis of the impeller groove 412 coincides with the axis of the drive shaft 44. Based on this, the air circulating between the fixed detection plate 41 and the movable detection plate 42 will only generate thrust on the blades 440 exposed on the drive shaft 44, thereby enabling the drive shaft 44 to always rotate in the same direction.

[0042] Specifically, such as Figure 5 As shown, in order to power the electrochemical sensor 46 , in this embodiment, a power control room 400 is opened above the gas detection box 40 , and a power supply 45 is installed inside the power control room 400 , which is electrically connected to the electrochemical sensor 46 .

[0043] Specifically, such as Figure 1 - Figure 2 As shown, in order to ensure the air circulation speed inside the air inlet duct 10 and the air outlet duct 11, and thus ensure the accuracy of detection, in this embodiment, the air inlet duct 10 and the air outlet duct 11 are interconnected to form an L-shaped channel structure, and a draft fan 12 is installed at the front end of the air outlet duct 11. The draft fan 12 can ensure that when the air circulation speed is slow, the air circulation speed inside the air inlet duct 10 and the air outlet duct 11 is improved, thereby significantly improving the detection speed and detection accuracy when the air circulation speed is slow.

[0044] Specifically, such as Figure 2 As shown, in order to realize the simultaneous detection of multiple toxic gases, in this embodiment, the host 1 has multiple plug-in ports 13, and each plug-in port 13 can be plugged into a plug-in detection module 4. Based on this, the device can install the corresponding plug-in detection module 4 according to actual detection needs for detection and use, thereby improving the applicability of the device.

[0045] The exemplary implementation schemes proposed in the present disclosure are described in detail above with reference to preferred embodiments. However, it will be understood by those skilled in the art that, without departing from the concept of the present disclosure, various modifications and variations can be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present disclosure can be combined in various ways without exceeding the scope of protection of the present disclosure, which is determined by the appended claims.

Claims

1. A poison gas detection device, used for poison gas detection, comprising a main unit (1) having a walking chassis (2), an image acquisition camera (3) being installed above the main unit (1), characterized in that: An air inlet duct (10) and an air outlet duct (11) are provided inside the host (1), and the air inlet duct (10) and the air outlet duct (11) are interconnected for air circulation. A plug-in detection module (4) is detachably installed on the side of the host (1); The plug-in detection module (4) includes a poison gas detection box (40), a side of the poison gas detection box (40) is provided with a through hole (401), the through hole (401) coincides with the poison gas detection box (40), so that air can pass through the through hole (401), a fixed detection plate (41) and a movable detection plate (42) are installed inside the through hole (401), and an electrochemical sensor (46) is embedded on the side of the fixed detection plate (41) and the movable detection plate (42) close to each other. The poison gas detection box (40) is also provided with a driving mechanism capable of controlling the rotation of the movable detection plate (42), so that the ventilation gap shape between the movable detection plate (42) and the fixed detection plate (41) can be automatically adjusted and changed according to the wind speed of the air passing between the fixed detection plate (41) and the movable detection plate (42).

2. A poison gas detection device according to claim 1, characterized in that: There are two groups of movable detection plates (42) installed. The two groups of movable detection plates (42) are symmetrically distributed on the upper and lower sides of the fixed detection plate (41). An end plate (43) is installed on one side of the through-hole (401). The middle positions of the two ends of the movable detection plates (42) are rotatably installed between the inner wall of the through-hole (401) and the end plates (43) through the driven shaft (420) and the bearing. The end plates (43) are provided with a mounting position of the driven shaft (420). A mounting groove (430) is provided, wherein a gap is provided between the inner wall of the mounting groove (430) and the end of the driven shaft (420), a second convex shaft (431) is provided on the inner wall of the mounting groove (430) at the gap, a first convex shaft (421) is installed on the driven shaft (420), a spring (47) is connected between the second convex shaft (431) and the first convex shaft (421), and the spring (47) enables the movable detection plate (42) to be in a horizontal position in a natural state.

3. A poison gas detection device according to claim 2, characterized in that: The driving mechanism includes a driving shaft (44) rotatably mounted on the end plate (43), one end of the driving shaft (44) extends between the fixed detection plate (41) and the movable detection plate (42) and is provided with a blade (440), the other end of the driving shaft (44) is rotatably mounted on the end plate (43) via a bearing, an outer rotating sleeve (441) is also rotatably provided inside the end plate (43) at an outer position of the driving shaft (44) via a bearing, and the outer rotating sleeve (441) is connected to the convex shaft (421) via a traction wire (442). The outer rotating sleeve (441) is connected so that the outer rotating sleeve (441) can pull the spring (47) to contract when rotating, so that the movable detection plate (42) rotates. A movable connection component is installed between the driving shaft (44) and the outer rotating sleeve (441). Through the movable connection component, when the rotation speed of the driving shaft (44) is lower than or equal to a set threshold, no transmission occurs between the driving shaft (44) and the outer rotating sleeve (441); when the rotation speed of the driving shaft (44) is higher than the set threshold, transmission occurs between the driving shaft (44) and the outer rotating sleeve (441).

4. A poison gas detection device according to claim 3, characterized in that: The movable connection assembly includes a friction plate (443) and a tension spring (446), wherein there is a gap between the friction plate (443) and the drive shaft (44), and the tension spring (446) is installed in the gap between the friction plate (443) and the drive shaft (44) and is located at the center of the friction plate (443) to connect the friction plate (443) to the drive shaft (44).

5. A poison gas detection device according to claim 4, characterized in that: The movable connection assembly further includes a sleeve (444) and a limiting rod (445), wherein the sleeve (444) adopts a hollow cylindrical structure and is installed on the inner side of the friction plate (443); the limiting rod (445) adopts a rod-shaped structure and is fixed on the surface of the drive shaft (44); the limiting rod (445) and the sleeve (444) are on the same straight line, and the limiting rod (445) is movably inserted into the sleeve (444).

6. A poison gas detection device according to any one of claims 5-6, characterized in that: The friction plate (443) adopts an arc-shaped structure, so that when the friction plate (443) moves outward and contacts the inner wall of the outer rotating sleeve (441), it can fit with the inner wall of the outer rotating sleeve (441), and a plurality of friction plates (443) are provided. The plurality of friction plates (443) are distributed in an annular array on the outside of the driving shaft (44) with the central axis of the driving shaft (44) as the reference axis.

7. A poison gas detection device according to claim 3, characterized in that: An impeller groove (412) with a semicircular cross-section is provided on the end surface of the fixed detection plate (41), and the axis of the impeller groove (412) coincides with the axis of the drive shaft (44).

8. A poison gas detection device according to claim 4, characterized in that: A power control room (400) is provided above the poison gas detection box (40), a power supply (45) is installed inside the power control room (400), and the power supply (45) is electrically connected to the electrochemical sensor (46).

9. The poison gas detection device according to claim 1, characterized in that: The air inlet duct (10) and the air outlet duct (11) are interconnected to form an L-shaped channel structure, and an induced draft fan (12) is installed at the front end of the air outlet duct (11).

10. The poison gas detection device according to claim 1, characterized in that: The host (1) is provided with a plurality of plug-in ports (13), and each plug-in port (13) can be plugged into a plug-in detection module (4).

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