Gas detection device for biogas digester

Abstract

The utility model discloses a methane tank gas detection device and belongs to the field of methane tanks. A biogas digester gas detection device comprises a device frame body, durable anti-corrosion mechanisms are arranged in a movable bottom frame and on the surface of an adjusting rod, a rapid fixing mechanism is arranged on the surface of the movable bottom frame, and sealing gas leakage prevention mechanisms are arranged on the inner wall of a gas inlet pipe and the inner wall of a gas suction pipe. According to the utility model, not only is the phenomenon that the detection device slips in use avoided, but also the detection device is more convenient to operate in use, so that the phenomenon that the gas suction probe is corroded by gas containing a large amount of biogas when extending into the biogas digester for a long time is avoided, and the service life of the detection device is greatly prolonged; and the phenomenon that gas detection is not accurate enough due to gas leakage in the use process of the detection device is avoided, and the overall sealing performance of the detection device is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a biogas tank technical field especially relates to a biogas tank gas detection device. BACKGROUND

[0002] The raw material of manufacturing biogas is mainly animal's excrement and sewage and rotten object etc., and the available gas is formed through special fermentation, and in the biogas fermentation process, the content of various gases in the biogas tank needs to be detected, so as to know whether the gas content is overproof, the existing gas detection device detects the hydrogen sulfide content in the biogas tank when detecting the gas content in the biogas tank, and there is the problem of inconvenient movement and carrying, in order to meet the needs of the market, the biogas tank gas detection device is needed.

[0003] Through the search, the patent with the patent number of 202022671836.8 discloses a kind of biogas content detection device, including fixing frame, first connecting frame, first rotating shaft, placing box, biogas detector, connecting pipe, detection tube, second connecting frame, second rotating shaft and rack.The biogas content detection device in the above-mentioned patent has the following disadvantages:the existing detection device is inconvenient to fix when using, which can easily lead to the phenomenon of detection device when using, and the detection device is not convenient to operate when using;In addition, the sealing air leakage effect of the existing detection device needs to be further improved when using, which can easily lead to the phenomenon that the gas detection is not accurate during the use of detection device, and the overall sealing property of detection device is reduced UTILITY MODEL CONTENT

[0004] The utility model aims at solving the problems of inconvenient fixing of detection device when using, poor durable corrosion resistance and further improving the sealing air leakage effect in the prior art, and provides a kind of biogas tank gas detection device.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A kind of biogas tank gas detection device, including device frame body, the surface of the top position of the device frame body is mounted with holding box, the lower portion of the device frame body is provided with mobile chassis, the inside of the mobile chassis is provided with adjusting rod, the inside of the holding box is installed with gas pump, the output end of the gas pump is installed with air inlet pipe, one end of the air inlet pipe penetrates holding box and extends to the outside of holding box, the surface of the air inlet pipe is installed with suction pipe by screw, the inside of the mobile chassis and the surface of adjusting rod are provided with durable corrosion resistance mechanism, the surface of the mobile chassis is provided with quick fixing mechanism, the inner wall of the air inlet pipe and suction pipe is provided with sealing air leakage prevention mechanism.

[0007] As a preferred technical scheme of the present application, the surface at the top position of the device frame body is provided with a handle, the surface at the top position of the device frame body is provided with a pump suction type gas detector through screw mounting, the surface of the pump suction type gas detector is provided with a display screen, the inside of the pump suction type gas detector is provided with an alarm, the inside of the pump suction type gas detector is provided with a signal processing circuit board, the inside of the pump suction type gas detector is provided with a sensor, the alarm, the signal processing circuit board and the sensor are connected, the inner walls of the containing box are provided with heat dissipation holes for heat dissipation, one end of the adjusting rod extends above the moving base and is fixed to the surface at the bottom position of the device frame body, one end of the air suction pipe extends into the air inlet pipe and communicates with the air inlet pipe, the surface of the air suction pipe is sleeved with an air suction probe, the air suction probe communicates with the inside of the air suction pipe, the surface of the air suction probe is provided with a guide sliding block, the surface of the moving base is provided with a guide rod, and the guide rod and the surface of the guide sliding block are slidably connected.

[0008] As a preferred technical scheme of the present application, the inside of the durable corrosion-resistant mechanism comprises a servo motor, a rotating shaft and a durable corrosion-resistant group, the durable corrosion-resistant group is arranged in the inside of the moving base and on the surface of the adjusting rod, the durable corrosion-resistant group is composed of a guide groove, an adjusting cylinder and an adjusting screw, the inside of the moving base is provided with the adjusting screw, the adjusting screw and the inner wall of the moving base are rotatably connected, and the surface of the adjusting screw is threadedly sleeved with the adjusting cylinder.

[0009] As a preferred technical scheme of the present application, the inner walls of the moving base are provided with guide grooves, the guide grooves and the surface of the adjusting cylinder are slidably connected, the surface of the adjusting cylinder is fixed to the surface at the bottom position of the adjusting rod, the inside of the moving base is provided with a servo motor, the output end of the servo motor is provided with a rotating shaft through a shaft coupling, and the surface of the rotating shaft is fixed to the surface at the bottom position of the adjusting screw.

[0010] As a preferred technical scheme of the present application, the quick fixing mechanism is composed of a push-pull rod, a stable base, an extension spring, an arc-shaped clamping piece, a first arc-shaped groove and a second arc-shaped groove, the surface of the moving base is provided with the push-pull rod, one end of the push-pull rod extends below the moving base and is provided with the stable base, the push-pull rod and the inner wall of the moving base are slidably connected, the inner walls of the moving base are provided with the first arc-shaped groove, and the inner walls of the moving base are provided with the second arc-shaped groove.

[0011] As a preferred technical scheme of the present application, the surface of the push-pull rod is provided with an arc-shaped clamping piece, the arc-shaped clamping piece is in sliding fit with the inner wall of the push-pull rod, the arc-shaped clamping piece is in clamping fit with the surface of the first arc-shaped groove and the second arc-shaped groove respectively, the surface of the arc-shaped clamping piece is provided with an extension spring, and one end of the extension spring is fixed to the inner wall of the push-pull rod.

[0012] As a preferred technical scheme of the present application, the inside of the sealing air leakage prevention mechanism comprises a sealing frame, a rubber sealing gasket and a sealing air leakage prevention group, the sealing air leakage prevention group is arranged on the inner wall of the air inlet pipe and the air suction pipe, the sealing air leakage prevention group is composed of an elastic force device and a groove, the inner wall of the air inlet pipe is provided with the sealing frame, the inside of the sealing frame is provided with the rubber sealing gasket, and one end of the rubber sealing gasket extends to the outside of the sealing frame and is in contact with the inner wall of the air suction pipe.

[0013] As a preferred technical scheme of the present application, the inner wall of the sealing frame is provided with the groove, the groove is in sliding fit with the surface of the rubber sealing gasket, the inner wall of the sealing frame is provided with the elastic force device at equal intervals, and one end of the elastic force device is fixed to the surface of the rubber sealing gasket.

[0014] Compared with the prior art, the biogas tank gas detection device has the following beneficial effects:

[0015] 1. The biogas tank gas detection device, through the quick fixing mechanism, can avoid the phenomenon of detection device walking during use, and makes the detection device more convenient to operate during use, solving the problem of inconvenient fixing in the prior art.

[0016] 2. The biogas tank gas detection device, through the durable corrosion-resistant mechanism, can avoid the phenomenon of the gas containing a large amount of biogas corroding the air suction probe due to long-time extension into the biogas tank, greatly improves the service life of the detection device, and solves the problem of poor corrosion-resistant effect in the prior art.

[0017] 3. The biogas tank gas detection device, through the sealing air leakage prevention mechanism, can avoid the phenomenon of inaccurate gas detection due to air leakage during use of the detection device, further improves the overall sealing performance of the detection device, and solves the problem of further improving the sealing air leakage prevention effect in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0019] Figure 2 It is a front view cross-sectional structure schematic view of the utility model;

[0020] Figure 3 It is the overhead sectional enlarged structure schematic view of the utility model;

[0021] Figure 4 It is the overhead sectional enlarged structure schematic view of the utility model; Figure 2 It is the overhead sectional enlarged structure schematic view of the utility model;

[0022] Figure 5 It is the overhead sectional enlarged structure schematic view of the utility model; Figure 2 It is the overhead sectional enlarged structure schematic view of the utility model;

[0023] Figure 6 It is the overhead sectional enlarged structure schematic view of the utility model; Figure 3 It is the overhead sectional enlarged structure schematic view of the utility model.

[0024] In the drawing:

[0025] 1, device frame body;101, controller;102, mobile chassis;103, adjusting rod;104, handle;105, pump suction gas detector;106, holding box;107, display screen;108, alarm;109, signal processing circuit board;110, sensor;111, air pump;112, suction pipe;113, guide sliding block;114, suction probe;115, guide rod;116, heat dissipation hole;117, air inlet pipe;2, durable anticorrosion mechanism;21, servo motor;22, rotating shaft;23, durable anticorrosion group;231, guide groove;232, adjusting screw cylinder;233, adjusting screw;3, quick fixing mechanism;31, push-pull rod;32, stable base;33, extension spring;34, arc-shaped clamping piece;35, first arc-shaped groove;36, second arc-shaped groove;4, sealing air leakage prevention mechanism;41, sealing frame;42, rubber sealing pad;43, sealing air leakage prevention group;431, elastic device;432, groove. DETAILED DESCRIPTION

[0026] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model;Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments;Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model. EMBODIMENT

[0027] Refer to Figures 1-3The utility model provides a marsh gas pool gas detection device, including device frame body 1, the surface mounting handle 104 at the top position of device frame body 1, the surface mounting pump suction type gas detector 105 at the top position of device frame body 1 is installed through screw, the surface mounting display screen 107 of pump suction type gas detector 105, the inside installation alarm 108 of pump suction type gas detector 105, the inside installation signal processing circuit board 109 of pump suction type gas detector 105, the inside installation sensor 110 of pump suction type gas detector 105 are connected between alarm 108, signal processing circuit board 109 and sensor 110, the surface mounting containing box 106 at the top position of device frame body 1, the inner wall of containing box 106 all is seted up and is used for the heat dissipation heat dissipation hole 116, the surface mounting controller 101 of device frame body 1, the model of this controller 101 can select LA series, the below of device frame body 1 all is provided with mobile chassis 102, the inside setting of mobile chassis 102 is adjusted pole 103, and the one end of adjusted pole 103 extends to the above of mobile chassis 102 and is fixed with the surface at the bottom position of device frame body 1, the inside installation of containing box 106 is gas pump 111, the model of this gas pump 111 can select YX series, and the input of gas pump 111 is electrically connected with the output of controller 101, and the output of gas pump 111 is installed and is inhaled pipe 117, and one end of inhaled pipe 117 penetrates containing box 106 and extends to the outside of containing box 106, and the surface mounting of inhaled pipe 117 is inhaled pipe 112 through screw, and one end of inhaled pipe 112 extends to the inside of inhaled pipe 117 and is communicated with inhaled pipe 117, and the surface of inhaled pipe 112 is equipped with inhaled probe 114, and inhaled probe 114 is communicated with the inside of inhaled pipe 112, and the surface mounting of inhaled probe 114 is guided sliding block 113, and the surface mounting of mobile chassis 102 is guided rod 115, and guided rod 115 and guided sliding block 113 are mutually sliding fit.

[0028] Referring to Figure 2 and Figure 4, further, the surface of the moving base 102 is provided with a durable anti-corrosion mechanism 2, the inside of the durable anti-corrosion mechanism 2 contains a servo motor 21, a rotating shaft 22 and a durable anti-corrosion group 23, the durable anti-corrosion group 23 is arranged on the surface of the moving base 102 and the adjusting rod 103, the durable anti-corrosion group 23 is composed of a guide groove 231, an adjusting screw cylinder 232 and an adjusting screw 233, the inside of the moving base 102 is provided with the adjusting screw 233, the adjusting screw 233 is rotatably connected with the inner wall of the moving base 102, the surface of the adjusting screw 233 is sleeved with the adjusting screw cylinder 232, the inner wall of the moving base 102 is provided with the guide groove 231, the guide groove 231 and the surface of the adjusting screw cylinder 232 are slidably connected, the surface of the adjusting screw cylinder 232 is fixed with the surface of the bottom of the adjusting rod 103, the inside of the moving base 102 is installed with the servo motor 21, the model of the servo motor 21 can be selected as HF series, the input end of the servo motor 21 is electrically connected with the output end of the controller 101, the output end of the servo motor 21 is installed with the rotating shaft 22 through a shaft coupling, the surface of the rotating shaft 22 is fixed with the surface of the bottom of the adjusting screw 233. By arranging the durable anti-corrosion mechanism, the phenomenon that the suction probe 114 is corroded by the gas containing a large amount of biogas when the detection device is used for a long time can be avoided, and the service life of the detection device is greatly improved.

[0029] Referring to Figure 2 and Figure 5 , further, the surface of the moving base 102 is provided with a quick fixing mechanism 3, the quick fixing mechanism 3 is composed of a push-pull rod 31, a stable base 32, an extension spring 33, an arc-shaped clamping piece 34, a first arc-shaped groove 35 and a second arc-shaped groove 36, the surface of the moving base 102 is provided with the push-pull rod 31, one end of the push-pull rod 31 extends to the lower side of the moving base 102 and is installed with the stable base 32, the push-pull rod 31 and the inner wall of the moving base 102 are slidably connected, the inner wall of the moving base 102 is provided with the first arc-shaped groove 35, the inner wall of the moving base 102 is provided with the second arc-shaped groove 36, the surface of the push-pull rod 31 is provided with the arc-shaped clamping piece 34, the arc-shaped clamping piece 34 and the inner wall of the push-pull rod 31 are slidably connected, the arc-shaped clamping piece 34 and the surfaces of the first arc-shaped groove 35 and the second arc-shaped groove 36 are clamped and connected, the surface of the arc-shaped clamping piece 34 is installed with the extension spring 33, one end of the extension spring 33 is fixed with the inner wall of the push-pull rod 31. By arranging the quick fixing mechanism, the phenomenon that the detection device is walked during use can be avoided, and the detection device is more convenient to operate during use.

[0030] Referring to Figure 3 and Figure 6Further, the inner wall of the air inlet pipe 117 and the air suction pipe 112 is provided with a sealing air leakage prevention mechanism 4, the sealing air leakage prevention mechanism 4 comprises a sealing frame 41, a rubber sealing pad 42 and a sealing air leakage prevention group 43, the sealing air leakage prevention group 43 is arranged on the inner wall of the air inlet pipe 117 and the air suction pipe 112, the sealing air leakage prevention group 43 is composed of an elastic device 431 and a groove 432, the inner wall of the air inlet pipe 117 is provided with the sealing frame 41, the inner wall of the sealing frame 41 is provided with the rubber sealing pad 42, one end of the rubber sealing pad 42 extends to the outside of the sealing frame 41 and contacts with the inner wall of the air suction pipe 112, the inner wall of the sealing frame 41 is provided with the groove 432, the groove 432 and the surface of the rubber sealing pad 42 are in sliding fit, the inner wall of the sealing frame 41 is provided with the elastic device 431 at equal intervals, one end of the elastic device 431 is fixed to the surface of the rubber sealing pad 42. By arranging the sealing air leakage prevention mechanism, the phenomenon that the gas detection is not accurate due to air leakage during use of the detection device can be avoided, and the overall sealing performance of the detection device is further improved.

[0031] Specifically, during the working of the biogas tank gas detection device, first, the user pushes the device frame body 1 to the designated position at the edge of the biogas tank through the handheld handle 104, and the arc-shaped clamping piece 34 is clamped into the first arc-shaped groove 35 in the normal state, so that the push-pull rod 31 drives the stable base 32 to move away from the ground, so that the device frame body 1 can move normally. If it is necessary to fix the position of the device frame body 1, the user pushes the push-pull rod 31 downward, so that the push-pull rod 31 slides in the inner wall of the moving base 102. At this time, the arc-shaped clamping piece 34 presses the extension spring 33, so that the extension spring 33 drives the arc-shaped clamping piece 34 to move away from the surface of the first arc-shaped groove 35. When the push-pull rod 31 moves downward to the designated position, the arc-shaped clamping piece 34 is automatically clamped into the second arc-shaped groove 36 under the elastic force of the extension spring 33. The position of the push-pull rod 31 is fixed by the clamping effect of the arc-shaped clamping piece 34 and the second arc-shaped groove 36. At this time, the push-pull rod 31 drives the stable base 32 to move into contact with the ground. The device frame body 1 can be stably fixed at the edge of the biogas tank under the combined action of the stable base 32 and the stable base 32, so as to realize the function of quickly fixing the detection device, thereby avoiding the phenomenon that the detection device moves during use. At the same time, the detection device is more convenient to operate during use.

[0032] Then, the controller 101 controls the servo motor 21 inside the mobile chassis 102 to work, under the action of the servo motor 21, the rotating shaft 22 rotates, when the rotating shaft 22 rotates, the adjusting screw rod 233 rotates inside the mobile chassis 102, under the thread cooperation of the adjusting screw rod 233 and the adjusting screw cylinder 232, the adjusting screw cylinder 232 slides inside the guide groove 231, under the action of the guide groove 231, the adjusting screw cylinder 232 and the adjusting rod 103 are guided, the adjusting rod 103 is driven to move towards the inside of the mobile chassis 102, at this time, the adjusting rod 103 drives the device rack body 1 to move downward, the air suction pipe 112 drives the air suction probe 114 to move downward to the designated position inside the biogas tank, after detection, the servo motor 21 works to drive the adjusting screw rod 233 to rotate, under the thread cooperation of the adjusting screw rod 233 and the adjusting screw cylinder 232, the adjusting rod 103 moves upward, thereby driving the air suction pipe 112 and the air suction probe 114 to move downward, so that the air suction pipe 112 and the air suction probe 114 are away from the inside of the biogas tank, to avoid the air suction pipe 112 and the air suction probe 114 being stretched into the inside of the biogas tank for a long time and causing the surface to be corroded by the gas inside the biogas tank, to realize the function of corrosion resistance of the detection device, so that the detection device avoids the phenomenon that the air suction probe 114 is corroded by the gas containing a large amount of biogas when it is stretched into the biogas tank for a long time, greatly improving the service life of the detection device.

[0033] Then, the air suction probe 114 drives the guide sliding block 113 to slide on the surface of the guide rod 115, under the joint action of the guide sliding block 113 and the guide rod 115, the air suction probe 114 is guided, then the controller 101 controls the air pump 111 inside the containing box 106 to work, under the action of the heat dissipation hole 116, the heat generated by the air pump 111 when working is dissipated, to avoid the phenomenon that the air pump 111 is damaged due to overheating, under the action of the air pump 111, the biogas is sucked into the inside of the pump suction type gas detector 105 through the air inlet pipe 117, the air suction pipe 112 and the air suction probe 114, under the action of the sensor 110 inside the pump suction type gas detector 105, the gas concentration of methane, carbon dioxide and hydrogen sulfide is converted into an electric signal, the signal processing circuit board 109 amplifies, filters and digitizes the signal, and displays the detection result on the surface of the display screen 107, the user can obtain the concentration content of each gas in the biogas tank by observing the display screen 107, when the gas content inside the biogas tank exceeds the set value, the alarm 108 issues an alarm, further prompting the staff that the methane, carbon dioxide and hydrogen sulfide gas inside the biogas tank is over standard.

[0034] Subsequently, since the air inlet pipe 117 and the suction pipe 112 are connected by screws, if the screws are loose, gas will leak when entering the air inlet pipe 117 through the suction pipe 112, which will cause the pump suction gas detector 105 to be less accurate in detecting the gas. At this time, the rubber sealing gasket 42 is moved by the elastic force of the elastic device 431 inside the sealing frame 41, so that the rubber sealing gasket 42 slides inside the groove 432, and the rubber sealing gasket 42 is guided by the groove 432. Under the action of the elastic device 431, the rubber sealing gasket 42 is always in contact with the inner wall of the suction pipe 112. The sealing frame 41 and the rubber sealing gasket 42 jointly seal the air inlet pipe 117 and the suction pipe 112 to prevent gas leakage, so that the pump suction gas detector 105 can more accurately detect methane, carbon dioxide and hydrogen sulfide gas, thereby achieving the function of sealing the detection device to prevent gas leakage, avoiding the phenomenon that the detection device is not accurate in detecting gas due to gas leakage during use, further improving the overall sealing performance of the detection device, and ultimately completing the use of the detection device. The controller 101 controls the air pump 111 and the servo motor 21, and the specific control connection method is prior art and will not be described here.

[0035] The above is only a preferred embodiment of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can make equivalent replacements or changes within the technical range disclosed by the present application according to the technical scheme and concept of the present application, which should be covered within the protection scope of the present application.

Claims

1. A biogas plant gas detection device comprising a device frame (1), characterized in that: The surface of the top position of the device frame body (1) is provided with a containing box (106), the lower part of the device frame body (1) is provided with a moving chassis (102), the inside of the moving chassis (102) is provided with an adjusting rod (103), the inside of the containing box (106) is provided with an air pump (111), the output end of the air pump (111) is provided with an air inlet pipe (117), one end of the air inlet pipe (117) penetrates through the containing box (106) and extends to the outside of the containing box (106), the surface of the air inlet pipe (117) is provided with a suction pipe (112) through screws, the inside of the moving chassis (102) and the surface of the adjusting rod (103) are provided with a durable corrosion-resistant mechanism (2), the surface of the moving chassis (102) is provided with a quick fixing mechanism (3), the inner walls of the air inlet pipe (117) and the suction pipe (112) are provided with a sealed air leakage prevention mechanism (4).

2. The biogas plant gas detection device according to claim 1, characterized in that The surface of the top position of the device frame body (1) is provided with a handle (104), the surface of the top position of the device frame body (1) is provided with a pump suction type gas detector (105) through screws, the surface of the pump suction type gas detector (105) is provided with a display screen (107), the inside of the pump suction type gas detector (105) is provided with an alarm (108), the inside of the pump suction type gas detector (105) is provided with a signal processing circuit board (109), the inside of the pump suction type gas detector (105) is provided with a sensor (110), the alarm (108), the signal processing circuit board (109) and the sensor (110) are connected, the inner walls of the containing box (106) are provided with heat dissipation holes (116) for heat dissipation, one end of the adjusting rod (103) extends to the upper part of the moving chassis (102) and is fixed to the surface of the bottom position of the device frame body (1), one end of the suction pipe (112) extends to the inside of the air inlet pipe (117) and communicates with the air inlet pipe (117), the surface of the suction pipe (112) is provided with a suction probe (114), the suction probe (114) communicates with the inside of the suction pipe (112), the surface of the suction probe (114) is provided with a guide sliding block (113), the surface of the moving chassis (102) is provided with a guide rod (115), the guide rod (115) and the surface of the guide sliding block (113) are slidably connected.

3. The biogas plant gas detection device according to claim 1, characterized in that: The durable anti-corrosion mechanism (2) comprises a servo motor (21), a rotating shaft (22) and a durable anti-corrosion group (23), the durable anti-corrosion group (23) is arranged on the surface of the adjusting rod (103) and in the mobile chassis (102), the durable anti-corrosion group (23) comprises a guide groove (231), an adjusting screw cylinder (232) and an adjusting screw rod (233), the adjusting screw rod (233) is arranged in the mobile chassis (102) and is rotatably connected with the inner wall of the mobile chassis (102), and the surface of the adjusting screw rod (233) is threadedly sleeved with the adjusting screw cylinder (232).

4. The biogas plant gas detection device according to claim 1, characterized in that: The inner wall of the mobile chassis (102) is provided with the guide groove (231), the guide groove (231) is slidably connected with the surface of the adjusting screw cylinder (232), the surface of the adjusting screw cylinder (232) is fixedly connected with the surface of the adjusting rod (103) at the bottom position, the servo motor (21) is arranged in the mobile chassis (102), the output end of the servo motor (21) is connected with the rotating shaft (22) through a shaft coupling, and the surface of the rotating shaft (22) is fixedly connected with the surface of the adjusting screw rod (233) at the bottom position.

5. The biogas plant gas detection device according to claim 1, characterized in that: The quick fixing mechanism (3) comprises a push-pull rod (31), a stable base (32), an elastic spring (33), an arc-shaped clamping piece (34), a first arc-shaped groove (35) and a second arc-shaped groove (36), the surface of the mobile chassis (102) is provided with the push-pull rod (31), one end of the push-pull rod (31) extends to the lower side of the mobile chassis (102) and is provided with the stable base (32), the push-pull rod (31) is slidably connected with the inner wall of the mobile chassis (102), the inner wall of the mobile chassis (102) is provided with the first arc-shaped groove (35) and the second arc-shaped groove (36).

6. The biogas plant gas detection device according to claim 5, characterized in that The surface of the push-pull rod (31) is provided with the arc-shaped clamping piece (34), the arc-shaped clamping piece (34) is slidably connected with the inner wall of the push-pull rod (31), the arc-shaped clamping piece (34) is clampedly connected with the surfaces of the first arc-shaped groove (35) and the second arc-shaped groove (36), respectively, and the surface of the arc-shaped clamping piece (34) is provided with the elastic spring (33), one end of the elastic spring (33) is fixedly connected with the inner wall of the push-pull rod (31).

7. The biogas plant gas detection device according to claim 1, characterized in that: The sealing and air leakage prevention mechanism (4) comprises a sealing frame (41), a rubber sealing gasket (42) and a sealing and air leakage prevention group (43), the sealing and air leakage prevention group (43) is arranged on the inner walls of the air inlet pipe (117) and the air suction pipe (112), the sealing and air leakage prevention group (43) comprises an elastic device (431) and a groove (432), the inner wall of the air inlet pipe (117) is provided with the sealing frame (41), the sealing frame (41) is internally provided with the rubber sealing gasket (42), one end of the rubber sealing gasket (42) extends to the outside of the sealing frame (41) and is in contact with the inner wall of the air suction pipe (112).

8. The biogas plant gas detection device according to claim 7, characterized in that The inner wall of the sealing frame (41) is provided with a groove (432), which is in sliding fit with the surface of the rubber sealing gasket (42), and the inner wall of the sealing frame (41) is provided with equidistant elastic devices (431), one end of the elastic device (431) is fixed with the surface of the rubber sealing gasket (42).

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