A portable gas monitoring and ventilation device

Abstract

The present invention relates to the field of gas monitoring and ventilation technology, and discloses a portable gas monitoring and ventilation device, including: an observation box, a pull rope is arranged between the front and rear ends of the observation box, an observation unit is arranged on the inner side of the observation box, a support unit is arranged on the inner bottom of the observation box, the observation unit includes a motor arranged on the inner side of the observation box, a rotating shaft is arranged at the output end of the motor, a fan blade is arranged on the outer side of the rotating shaft, an air exchange chamber matching the fan blade is opened on the inner side of the observation box, and a ventilation component is arranged at the rear end of the rotating shaft. Its beneficial effects are: entering the position where the observation component is located through the first ventilation pipe to filter and retain and observe the condition of the air, which is convenient for the staff to have a more intuitive understanding of the air at the monitoring site, the structure of the ventilation component can be driven to extend by the rotation of the rotating shaft, and the gas at different heights is absorbed and observed, and the observation component adjusts the filtering part according to the rotation of the rotating shaft to observe the gas conditions at different heights.

Description

Technical Field

[0001] The present invention relates to the technical field of gas monitoring and ventilation, and in particular to a portable gas monitoring and ventilation device. Background Art

[0002] Gas monitoring is the process of detecting and analyzing the gas composition in the environment or a specific area. Its purpose is to determine the type and concentration of the gas and possible dangers or pollution. Ventilation is to achieve the exchange of indoor and outdoor air through air flow to reduce the concentration of harmful gases and improve air quality.

[0003] Some existing portable gas monitoring and ventilation devices are inconvenient to use due to their large structure. They are not convenient for staff to carry to monitor gases in different places. They do not have the function of observing the gas retention after monitoring and can only be observed through the monitoring structure of the instrument. In addition, the storage effect of the ventilation structure is not perfect during use and cannot be stored at any time. Summary of the invention

[0004] In view of the above problems of a portable gas monitoring and ventilation device, the present invention is proposed.

[0005] Therefore, the object of the present invention is to provide a portable gas monitoring and ventilation device, which is used to solve the problems that some portable gas monitoring and ventilation devices are inconvenient to use due to their large structure during use, which is not convenient for staff to carry to monitor the gas in different places, and does not have the function of observing the gas retention after monitoring, and can only be observed through the monitoring structure of the instrument, and the storage effect of the ventilation structure is not perfect during use, and cannot be stored at any time.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a portable gas monitoring and ventilation device, comprising: an observation box, a pull rope is arranged between the front and rear ends of the observation box, an observation unit is arranged on the inner side of the observation box, and a support unit is arranged on the inner bottom of the observation box;

[0007] The observation unit includes a motor arranged on the inner side of an observation box, a rotating shaft is arranged at the output end of the motor, a fan blade is arranged on the outer side of the rotating shaft, an air exchange chamber matching the fan blade is opened on the inner side of the observation box, a ventilation component is arranged at the rear end of the rotating shaft, a second ventilation pipe is arranged on the side of the ventilation component close to the motor, a gas detector is arranged at the front end of the two second ventilation pipes, a first ventilation pipe is arranged on the side of the gas detector away from the second ventilation pipe, an observation component is arranged on the outer side of the rotating shaft, and the observation component is located between the fan blade and the first ventilation pipe, and an exhaust component is arranged on the outer side of the observation box, and the exhaust component is located above the ventilation component.

[0008] As a preferred embodiment of the portable gas monitoring and ventilation device described in the present invention, the observation component includes a reciprocating screw arranged between two sections of rotating shafts, a slider is arranged on the outer side of the reciprocating screw through a reciprocating thread, a plurality of sliding shafts are arranged on the outer side of the slider, a rotating wheel is arranged on the outer side of the slider, and the rotating wheel is rotatably connected to the observation box, a sliding groove matching the sliding shaft is opened on the inner side of the rotating wheel, a plurality of isolation plates are arranged on the rear side of the rotating wheel, and a filter plate is arranged on the inner side of the isolation plate.

[0009] As a preferred embodiment of the portable gas monitoring and ventilation device described in the present invention, the ventilation component includes an electric push rod arranged at the right end of the rotating shaft, a first connecting rod is arranged at the end of the electric push rod away from the rotating shaft, a plurality of groups of storage wheels are arranged on the outer side of the first connecting rod, a connecting rope is arranged on the outer side of the storage wheel, a fixed curved plate is arranged on the end of the connecting rope away from the storage wheel, a telescopic tube is arranged between the front and rear fixed curved plates, a plurality of groups of connecting curved plates are arranged on the outer side of the telescopic tube, and the connecting curved plates are slidably connected to the connecting rope, a telescopic rod is arranged between the top of the fixed curved plate and the observation box, and the telescopic rod is slidably connected to the connecting curved plate, a cover plate is arranged on the top of the telescopic tube, a bottom plate is arranged on the bottom surface of the telescopic tube, a plurality of groups of air suction ports are opened on the outer side of the connecting curved plate, and the air suction ports are located between the fixed curved plate and the bottom plate.

[0010] As a preferred solution of the portable gas monitoring and ventilation device described in the present invention, the exhaust assembly includes a connecting plate arranged on the outer side of the observation box, and the connecting plate is located above the fan blades, a fixing plate is arranged on the side of the connecting plate away from the fan blades, a clamping plate is arranged on the inner side of the fixing plate, an exhaust plate is arranged on the top surface of the clamping plate, an exhaust pipe is arranged on the bottom surface of the exhaust plate, and the exhaust pipe is fixedly connected to the connecting plate.

[0011] As a preferred embodiment of the portable gas monitoring and ventilation device described in the present invention, the supporting unit includes a turntable arranged on the front side of the observation box, a plurality of worm gears are arranged on the inner side of the observation box, and the front worm gears are fixedly connected to the turntable, a second connecting rod is arranged between the two worm gears, a long axis is arranged on the inner side of the observation box, and the long axis is located below the second connecting rod, a worm gear is arranged on the outer side of the second connecting rod, and the worm gear and the worm gear are meshed with each other, and a plurality of supporting legs are arranged on the outer side of the long axis, and the two supporting legs are staggered.

[0012] As a preferred solution of the portable gas monitoring and ventilation device described in the present invention, a roller is arranged between the support leg and the observation box, and the roller is located on the inner side of the support leg, and the support leg is provided with a circular groove matching the roller.

[0013] As a preferred solution of the portable gas monitoring and ventilation device described in the present invention, wherein: a clamping sleeve is provided on the outer side of the roller, a long plate is provided on the side of the clamping sleeve away from the observation box, a sealing plate is provided between the two ventilation chambers, a limiting sleeve is provided on the top surface of the ventilation chamber, and the limiting sleeve is slidably connected to the supporting leg.

[0014] Beneficial effects of the present invention:

[0015] 1. Enter the location of the observation component through the first ventilation pipe to filter and retain and observe the air conditions, so that the staff can have a more intuitive understanding of the air in the monitoring area. The structure of the ventilation component can be extended by the rotation of the shaft, so as to absorb and observe the gas at different heights. The observation component can adjust the filtering part according to the rotation of the shaft, so as to observe the gas conditions at different heights, and prevent the observation component structure from being blocked due to excessive impurities in the gas, thereby ensuring that the observation unit structure can operate for a long time.

[0016] 2. Through the slide groove opened on the inner side of the wheel, when the slide shaft moves to the rightmost side of the inner side of the wheel, the wheel rotates sixty degrees clockwise to replace the filter plate on the right side of the wheel, thereby ensuring that the retained samples are different. The samples retained by multiple filter plates can be observed and compared, thereby improving the accuracy of monitoring, and multiple filter plates can be separated by isolation sheets to ensure the accuracy of the samples stored in the filter plates.

[0017] 3. Adjust the length of the support legs according to the terrain, or the height at which the air needs to be monitored. Through the mutual cooperation between the structures, the support unit structure can be quickly extended and retracted, and the height of the observation box can be adjusted according to the terrain. The sealing plate is driven by the fixed force of the observation component to seal the bottom surface of the fixed curved plate, blocking the outside gas from invading the interior of the observation box when the device is not in use, thereby keeping the internal structure of the observation box clean and tidy, and the stability of the support unit structure when not in use, ensuring the safety of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of a portable gas monitoring and ventilation device of the present invention.

[0020] Figure 2It is a schematic diagram of the cross-sectional structure of a right side view of a portable gas monitoring and ventilation device of the present invention.

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of a portable gas monitoring and ventilation device of the present invention in a top view.

[0022] Figure 4 The present invention is a schematic diagram of the combined structure of an observation component and an adjustment component of a portable gas monitoring and ventilation device.

[0023] Figure 5 This is a schematic structural diagram of a support unit of a portable gas monitoring and ventilation device of the present invention.

[0024] Description of the drawings: 1. Observation box; 101. Pull rope; 200. Observation unit; 201. Motor; 202. Rotating shaft; 203. Fan blade; 204. Gas detector; 205. Observation assembly; 2051. Sliding block; 2052. Sliding shaft; 2053. Rotating wheel; 2054. Sliding groove; 2055. Isolation piece; 2056. Filter plate; 2057. Reciprocating screw rod; 206. Ventilation assembly; 2061. Electric push rod; 2062. First connecting rod; 2063. Cover plate; 2064. Storage wheel; 2065. Telescopic tube; 2066. Connecting curved plate; 2067. Telescopic rod; 2068. Fixed curved plate plate; 2069, bottom plate; 20610, connecting rope; 20611, air inlet; 207, exhaust assembly; 2071, connecting plate; 2072, fixing plate; 2073, exhaust duct; 2074, exhaust plate; 2075, clamping plate; 208, first ventilation duct; 209, air exchange chamber; 210, second ventilation duct; 300, supporting unit; 301, turntable; 302, second connecting rod; 303, long shaft; 304, worm gear; 305, supporting leg; 306, roller; 307, circular groove; 308, clamping sleeve; 309, long plate; 310, sealing plate; 311, limiting sleeve; 312, worm. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0028] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0029] Reference Figure 1-5 , which is an embodiment of the present invention, provides a portable gas monitoring and ventilation device, which includes: an observation box 1, a pull rope 101 is provided between the front and rear ends of the observation box 1, an observation unit 200 is provided on the inner side of the observation box 1, and a support unit 300 is provided on the inner bottom surface of the observation box 1;

[0030] The observation unit 200 includes a motor 201 arranged on the inner side of the observation box 1, a rotating shaft 202 is arranged at the output end of the motor 201, a fan blade 203 is arranged on the outer side of the rotating shaft 202, and an air exchange chamber 209 matching the fan blade 203 is opened on the inner side of the observation box 1, a ventilation component 206 is arranged at the rear end of the rotating shaft 202, a second ventilation pipe 210 is arranged on the side of the ventilation component 206 close to the motor 201, a gas detector 204 is arranged at the front end of the two second ventilation pipes 210, and a first ventilation pipe 208 is arranged on the side of the gas detector 204 away from the second ventilation pipe 210, an observation component 205 is arranged on the outer side of the rotating shaft 202, and the observation component 205 is located between the fan blade 203 and the first ventilation pipe 208, and an exhaust component 207 is arranged on the outer side of the observation box 1, and the exhaust component 207 is located above the ventilation component 206;

[0031] Specifically, when using the present device, the support unit 300 needs to be disassembled so that the support unit 300 contacts the ground to support the observation box 1, and then the observation unit 200 is started. The motor 201 drives the fan blades 203 to rotate inside the air exchange chamber 209 through the rotating shaft 202, so that the fan blades 203 generate negative pressure during the rotation, and transmit the air through the ventilation component 206 to the inside of the second ventilation pipe 210. The gas enters the gas detector 204 through the second ventilation pipe 210 for monitoring, and then enters the position of the observation component 205 through the first ventilation pipe 208 for filtration and retention and observation of the air condition, so that the staff can have a more intuitive understanding of the air at the monitoring site. The structure of the ventilation component 206 can be extended by the rotation of the rotating shaft 202, so as to absorb and observe the gas at different heights. The observation component 205 can adjust the filtering part according to the rotation of the rotating shaft 202, so as to observe the gas conditions at different heights, and prevent the observation component 205 structure from being blocked due to excessive impurities in the gas, thereby ensuring that the observation unit 200 structure can operate for a long time.

[0032] Reference Figure 2-3 and Figure 4 As shown, the observation assembly 205 includes a reciprocating screw 2057 disposed between two sections of the rotating shaft 202, a slider 2051 is disposed on the outer side of the reciprocating screw 2057 through a reciprocating thread, a plurality of slide shafts 2052 are disposed on the outer side of the slider 2051, a rotating wheel 2053 is disposed on the outer side of the slider 2051, and the rotating wheel 2053 is rotatably connected to the observation box 1, a sliding groove 2054 matching the slide shaft 2052 is provided on the inner side of the rotating wheel 2053, a plurality of isolation sheets 2055 are disposed on the rear side of the rotating wheel 2053, and a filter plate 2056 is disposed on the inner side of the isolation sheet 2055;

[0033] Specifically, after the gas is detected by the gas detector 204 and enters the space where the ventilation chamber 209 is located through the first ventilation pipe 208, it is necessary to retain the substances contained in the gas through the structure of the observation component 205. The rotating shaft 202 drives the reciprocating screw rod 2057 to rotate, and the reciprocating screw rod 2057 drives the slider 2051 to move back and forth through the reciprocating thread on the surface. The slider 2051 drives the rotating wheel 2053 to slide at the slide groove 2054, and the slide groove 2054 is opened on the inner side of the rotating wheel 2053. 54, when the slide shaft 2052 moves to the rightmost side of the inner side of the rotating wheel 2053, the rotating wheel 2053 rotates sixty degrees clockwise, thereby replacing the filter plate 2056 on the right side of the rotating wheel 2053, thereby ensuring that the retained samples are different, and the samples retained by multiple filter plates 2056 can be observed and compared, thereby improving the accuracy of monitoring, and multiple filter plates 2056 are separated by isolation plates 2055, thereby ensuring the accuracy of the samples stored in the filter plates 2056.

[0034] Reference Figure 2 and Figure 4 As shown, the ventilation assembly 206 includes an electric push rod 2061 arranged at the right end of the rotating shaft 202, and a first connecting rod 2062 is arranged at one end of the electric push rod 2061 away from the rotating shaft 202, and multiple groups of storage wheels 2064 are arranged on the outer side of the first connecting rod 2062, and a connecting rope 20610 is arranged on the outer side of the storage wheel 2064, and a fixed curved plate 2068 is arranged at one end of the connecting rope 20610 away from the storage wheel 2064, and a telescopic tube 2065 is arranged between the front and rear fixed curved plates 2068, and the outer side of the telescopic tube 2065 is arranged There are multiple groups of connecting curved plates 2066, and the connecting curved plates 2066 are slidably connected to the connecting ropes 20610. A telescopic rod 2067 is provided between the top of the fixed curved plate 2068 and the observation box 1, and the telescopic rod 2067 is slidably connected to the connecting curved plate 2066. A cover plate 2063 is provided on the top of the telescopic tube 2065, and a bottom plate 2069 is provided on the bottom surface of the telescopic tube 2065. Multiple groups of air suction ports 20611 are provided on the outer side of the connecting curved plate 2066, and the air suction ports 20611 are located between the fixed curved plate 2068 and the bottom plate 2069.

[0035] Specifically, when the device is used, the structure of the ventilation assembly 206 needs to be extended, and the connection between the electric push rod 2061 and the rotating shaft 202 can be activated. The rotating shaft 202 drives the electric push rod 2061 to rotate and the triangular anti-slip groove between the rotating shaft 202 and the electric push rod 2061 is clamped. The electric push rod 2061 drives the multiple storage wheels 2064 to rotate, and the storage wheels 2064 release the stored connection ropes 20610, so that the telescopic tube 2065 moves downward under the action of the bottom base plate 2069, and the telescopic tube During the movement, 2065 is extended while being fixedly connected to the observation box 1 and the fixed curved plate 2068 respectively through the telescopic rod 2067. The stability of the telescopic tube 2065 during the movement is maintained by the fixed curved plate 2068. After the ventilation component 206 structure is placed in a suitable position, the electric push rod 2061 is started, and the electric push rod 2061 and the rotating shaft 202 are separated so that the bottom plate 2069 is in a suitable position, and the friction effect between the storage wheel 2064 made of hard rubber and the observation box 1 is used for limiting.

[0036] Reference Figure 1 and Figure 2 As shown, the exhaust assembly 207 includes a connecting plate 2071 arranged on the outer side of the observation box 1, and the connecting plate 2071 is located above the fan blade 203, a fixing plate 2072 is arranged on the side of the connecting plate 2071 away from the fan blade 203, a clamping plate 2075 is arranged on the inner side of the fixing plate 2072, an exhaust plate 2074 is arranged on the top surface of the clamping plate 2075, an exhaust pipe 2073 is arranged on the bottom surface of the exhaust plate 2074, and the exhaust pipe 2073 is fixedly connected to the connecting plate 2071;

[0037] Specifically, the connecting plate 2071 and the observation box 1 are sealed and connected by screws. After use, the observation box 1 and the connecting plate 2071 can be separated to disassemble the structure inside the air exchange chamber 209. The gas enters the exhaust plate 2074 through the exhaust pipe 2073 for ventilation. The exhaust plate 2074 and the clamping plate 2075 can be separated. According to the length of the exhaust pipe 2073, the exhaust plate 2074 can be placed in a suitable position for exhaust, thereby realizing ventilation of the structure.

[0038] Reference Figure 1 and Figure 4-5 As shown, the support unit 300 includes a turntable 301 arranged on the front side of the observation box 1, a plurality of worms 312 are arranged on the inner side of the observation box 1, and the front worm 312 is fixedly connected to the turntable 301, a second connecting rod 302 is arranged between the two worms 312, a long axis 303 is arranged on the inner side of the observation box 1, and the long axis 303 is located below the second connecting rod 302, a worm wheel 304 is arranged on the outer side of the second connecting rod 302, and the worm wheel 304 and the worm 312 are meshed with each other, and a plurality of supporting legs 305 are arranged on the outer side of the long axis 303, and the two supporting legs 305 are staggered;

[0039] Specifically, the worm 312 is driven to rotate by rotating the turntable 301, and the front worm 312 drives the rear worm 312 to rotate through the second connecting rod 302. The worm 312 drives the worm wheel 304 to rotate through the meshing action, and the worm wheel 304 drives the support leg 305 to rotate through the long axis 303, so that the support leg 305 is moved to a suitable position and then stretched. The length of the support leg 305 is adjusted according to the terrain, or the height of the air needs to be monitored. Through the mutual cooperation between the structures, the extension and storage of the support unit 300 structure can be quickly realized, and the height of the observation box 1 can be adjusted according to the terrain.

[0040] Reference Figure 1 and Figure 4-5 As shown, a roller 306 is provided between the support leg 305 and the observation box 1, and the roller 306 is located on the inner side of the support leg 305, and the support leg 305 is provided with a circular groove 307 matching the roller 306;

[0041] Specifically, when the support leg 305 is to be stored, since the worm gear cannot drive the worm to rotate, the support leg 305 can only be prevented from being stored by rotating the turntable 301. When the support leg 305 is tilted, the friction with the ground is reduced by the action of the roller 306, which makes it convenient for the staff to rotate the turntable 301, thereby improving the staff's storage speed of the support unit 300 structure. By setting the circular groove 307 as a curved surface, it will not contact the ground, thereby not hindering the rotation of the roller 306.

[0042] Reference Figure 1 and Figure 4-5As shown, a sleeve 308 is provided on the outer side of the roller 306, a long plate 309 is provided on the side of the sleeve 308 away from the observation box 1, a sealing plate 310 is provided between the two ventilation chambers 209, a limiting sleeve 311 is provided on the top surface of the ventilation chamber 209, and the limiting sleeve 311 is slidably connected to the support leg 305;

[0043] Specifically, when the support leg 305 structure is stored, the two adjacent support legs 305 are fixed and limited by the action of the sleeve 308 and the long plate 309, and at the same time, the sealing plate 310 is driven by the fixing force of the observation component 205 to seal the bottom surface of the fixed curved plate 2068, thereby preventing external gas from invading the interior of the observation box 1 when the device is not in use, thereby keeping the internal structure of the observation box 1 clean and tidy, and the stability of the support unit 300 structure when not in use, ensuring the safety of the structure.

[0044] Working principle: When using this device, it is necessary to disassemble the support unit 300 so that the support unit 300 contacts the ground to support the observation box 1, and then start the observation unit 200. The motor 201 drives the fan blades 203 to rotate inside the air exchange chamber 209 through the rotating shaft 202, so that the fan blades 203 generate negative pressure during the rotation, and transmit the air through the ventilation component 206 to the inside of the second ventilation pipe 210. The gas enters the gas detector 204 through the second ventilation pipe 210 for monitoring, and then enters the position of the observation component 205 through the first ventilation pipe 208 for filtering and retaining and observing the condition of the air, so that the staff can have a more intuitive understanding of the air at the monitoring site. The structure of the ventilation component 206 can be extended by the rotation of the rotating shaft 202, so as to absorb and observe the gas at different heights, and the observation component 205 can adjust the filtering position according to the rotation of the rotating shaft 202.

[0045] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A portable gas monitoring and ventilation device, characterized in that: include: An observation box (1), wherein a pull rope (101) is provided between the front and rear ends of the observation box (1), an observation unit (200) is provided on the inner side surface of the observation box (1), and a support unit (300) is provided on the inner bottom surface of the observation box (1); The observation unit (200) comprises a motor (201) arranged on the inner side of an observation box (1); a rotating shaft (202) is arranged at the output end of the motor (201); a fan blade (203) is arranged on the outer side of the rotating shaft (202); a ventilation chamber (209) matching the fan blade (203) is provided on the inner side of the observation box (1); a ventilation component (206) is arranged at the rear end of the rotating shaft (202); and a second ventilation pipe (210) is arranged on the side of the ventilation component (206) close to the motor (201). A gas detector (204) is arranged at the front end of the two second ventilation pipes (210); a first ventilation pipe (208) is arranged on the side of the gas detector (204) away from the second ventilation pipe (210); an observation component (205) is arranged on the outer side of the rotating shaft (202), and the observation component (205) is located between the fan blade (203) and the first ventilation pipe (208); an exhaust component (207) is arranged on the outer side of the observation box (1), and the exhaust component (207) is located above the ventilation component (206); The observation assembly (205) comprises a reciprocating screw (2057) arranged between two sections of rotating shafts (202); a slider (2051) is arranged on the outer side of the reciprocating screw (2057) via a reciprocating thread; a plurality of sliding shafts (2052) are arranged on the outer side of the slider (2051); a rotating wheel (2053) is arranged on the outer side of the slider (2051); the rotating wheel (2053) is rotatably connected to the observation box (1); a sliding groove (2054) matching the sliding shaft (2052) is arranged on the inner side of the rotating wheel (2053); a plurality of isolation plates (2055) are arranged on the rear side of the rotating wheel (2053); and a filter plate (2056) is arranged on the inner side of the isolation plate (2055); The ventilation assembly (206) comprises an electric push rod (2061) arranged at the right end of the rotating shaft (202); a first connecting rod (2062) is arranged at one end of the electric push rod (2061) away from the rotating shaft (202); a plurality of groups of storage wheels (2064) are arranged on the outer side of the first connecting rod (2062); a connecting rope (20610) is arranged on the outer side of the storage wheel (2064); a fixed curved plate (2068) is arranged at one end of the connecting rope (20610) away from the storage wheel (2064); a telescopic tube (2065) is arranged between the front and rear fixed curved plates (2068); and a telescopic tube (2065) is arranged on the outer side of the telescopic tube (2065). A plurality of groups of connecting curved plates (2066) are provided, and the connecting curved plates (2066) are slidably connected to the connecting ropes (20610); a telescopic rod (2067) is provided between the top of the fixed curved plate (2068) and the observation box (1), and the telescopic rod (2067) is slidably connected to the connecting curved plate (2066); a cover plate (2063) is provided at the top of the telescopic tube (2065), and a bottom plate (2069) is provided on the bottom surface of the telescopic tube (2065); a plurality of groups of air suction ports (20611) are provided on the outer side surface of the connecting curved plate (2066), and the air suction ports (20611) are located between the fixed curved plate (2068) and the bottom plate (2069); The exhaust assembly (207) comprises a connecting plate (2071) arranged on the outer side of the observation box (1), and the connecting plate (2071) is located above the fan blade (203); a fixing plate (2072) is arranged on the side of the connecting plate (2071) away from the fan blade (203); a clamping plate (2075) is arranged on the inner side of the fixing plate (2072); an exhaust plate (2074) is arranged on the top surface of the clamping plate (2075); an exhaust pipe (2073) is arranged on the bottom surface of the exhaust plate (2074); and the exhaust pipe (2073) is fixedly connected to the connecting plate (2071); The support unit (300) comprises a turntable (301) arranged on the front side of the observation box (1); a plurality of worms (312) are arranged on the inner side of the observation box (1); the front worm (312) is fixedly connected to the turntable (301); a second connecting rod (302) is arranged between the two worms (312); a long axis (303) is arranged on the inner side of the observation box (1); the long axis (303) is located below the second connecting rod (302); a worm wheel (304) is arranged on the outer side of the second connecting rod (302); the worm wheel (304) and the worm wheel (304) are meshed with the worm (312); a plurality of supporting legs (305) are arranged on the outer side of the long axis (303); and the two supporting legs (305) are arranged in a staggered manner.

2. A portable gas monitoring and ventilation device according to claim 1, characterized in that: A roller (306) is provided between the support leg (305) and the observation box (1), and the roller (306) is located on the inner side of the support leg (305), and the support leg (305) is provided with a circular groove (307) matching the roller (306).

3. A portable gas monitoring and ventilation device according to claim 2, characterized in that: A clamping sleeve (308) is provided on the outer side of the roller (306), a long plate (309) is provided on the side of the clamping sleeve (308) away from the observation box (1), a sealing plate (310) is provided between the two ventilation chambers (209), a limiting sleeve (311) is provided on the top surface of the ventilation chamber (209), and the limiting sleeve (311) is slidably connected to the support leg (305).

Images