A handheld VOCs online monitoring device

Abstract

The present invention discloses a handheld VOCs online monitoring device, including a handheld detector, wherein the handheld detector includes a VOCs detection body, a display screen located at the top of the VOCs detection body is provided on the surface of the VOCs detection body, a control button located below the display screen is provided on the surface of the VOCs detection body, and a speaker located below the control button is provided on the surface of the VOCs detection body; through a collection extension piece, a sampling tube and the handheld detector are designed as an integrated whole, and no assembly is required, which saves time and effort, and the sampling tube will not be lost, thereby ensuring that the sampling work is carried out normally; through a positioning clamping mechanism, a purification component can be fixed inside the handheld detector, so that a filter and the handheld detector are designed as an integrated whole, and no assembly is required, which saves time and effort, and the filter will not be lost, thereby further ensuring that the sampling work is carried out normally, and the sampling work will not be suspended due to the loss of parts, thereby improving the practicality of the handheld VOCs online monitoring device.

Description

Technical Field

[0001] The present invention relates to the field of volatile organic compound detection equipment, and more specifically, to a handheld VOCs online monitoring device. Background Art

[0002] Volatile organic compounds are various organic compounds with boiling points ranging from 50°C to 260°C at room temperature, commonly referred to as VOCs. Most VOCs have a special unpleasant odor and are toxic, irritating, and teratogenic. Benzene, toluene, and formaldehyde, in particular, can cause great harm to human health. VOCs are important precursors to urban haze and photochemical smog, and are mainly derived from coal chemical industry, petrochemical industry, fuel coating manufacturing, solvent manufacturing and use, and other processes. Handheld VOCs online monitoring equipment is a commonly used device for detecting VOCs concentrations.

[0003] The existing handheld VOCs online monitoring equipment is mainly composed of a shell and a detection component inside it, a display screen, a control button, a speaker, a sampling tube, etc., and a filter is connected between the sampling tube and the detection component in a plug-in manner. When in use, the sample gas enters the detection component through the sampling tube, and the detection component detects the sample gas and displays the detection result on the display screen. However, its anti-fall effect is poor, and it is easy to fall and break accidentally, and its service life is short. In addition, the sampling tube and the detection component adopt a split design, which not only needs to be assembled, but also the sampling tube is easy to be lost and affect the detection work. At the same time, the filter is external, which not only needs to be assembled, but also the filter is easy to be lost and affect the detection work. Therefore, it is urgent to design a handheld VOCs online monitoring device. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] The existing handheld VOCs online monitoring equipment in the prior art is mainly composed of a shell and a detection component inside it, a display screen, a control button, a speaker, a sampling tube, etc., and a filter is connected between the sampling tube and the detection component in a plug-in manner. When in use, the sample gas enters the detection component through the sampling tube, and the detection component detects the sample gas and displays the detection result on the display screen. However, it has a poor anti-fall effect and is easy to be accidentally dropped and broken, and has a short service life. In addition, the sampling tube and the detection component adopt a split design, which not only requires assembly, but also easily causes the sampling tube to be lost and affects the detection work. At the same time, the filter is external, which not only requires assembly, but also easily causes the filter to be lost and affects the detection work. The purpose of the present invention is to provide a handheld VOCs online monitoring equipment, which can well solve the problems raised in the background technology.

[0006] 2. Technical solution

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] A handheld VOCs online monitoring device comprises a handheld detector, wherein the handheld detector comprises a VOCs detector, a display screen located at the top of the VOCs detector is provided on the surface of the VOCs detector, a control button located below the display screen is provided on the surface of the VOCs detector, a speaker located below the control button is provided on the surface of the VOCs detector, a collection pipe located at the left end of the VOCs detector is connected to the top surface of the VOCs detector, a protective mechanism is provided on the outside of the VOCs detector, the protective mechanism comprises a protective column block, a protective chamber is provided inside the protective column block, the VOCs detector is located inside the protective chamber, a collection extension is provided on the top surface of the protective column block, the collection extension comprises a collection convex body, the collection convex body is fixedly connected to the top surface of the protective column block and is located at the left end thereof, a positioning clamping mechanism is provided inside the protective column block, the positioning clamping mechanism comprises a positioning clamping cavity, the positioning clamping cavity opening It is arranged inside the protective column block and directly below the collecting convex body, and a precise replacement structure is arranged inside the protective column block, and the precise replacement structure includes a displacement slide hole, which is arranged inside the protective column block, and the left end of the displacement slide hole is open and the opening is arranged on the left side surface of the protective column block, and the displacement slide hole divides the positioning clamping cavity into two parts, an upper and a lower part, and the displacement slide hole is connected with the positioning clamping cavity, and a purification component is arranged inside the positioning clamping cavity, and the purification component includes a purification disc, and the purification disc is movably inserted into the interior of the positioning clamping cavity, and a storage mechanism and a propulsion replacement mechanism are arranged inside the protective column block, and the storage mechanism includes a storage groove, which is arranged on the top surface of the protective column block and located at its right end, and the right end of the displacement slide hole is connected with the storage groove, and the bottom surface of the displacement slide hole is flush with the bottom surface of the storage groove, and the propulsion replacement mechanism includes a force storage disc cavity, which is arranged inside the protective column block and located on the right side of the storage groove.

[0009] Preferably, the protection mechanism also includes a pushing groove, which is arranged on the top surface of the inner cavity of the protection chamber and located at its left end, an elastic pushing block is embedded in the pushing groove, and an elastic buffer block is fixedly connected to the bottom end of the elastic pushing block, which is embedded in the protection chamber, an upper plug-in groove is arranged on the bottom surface of the elastic buffer block, the top end of the VOCs detection body is movably plugged into the upper plug-in groove, a collection through hole is arranged on the top surface of the inner cavity of the upper plug-in groove, the top end of the collection through hole passes through the elastic pushing block upward, the collection pipe is movably plugged into the collection through hole, an elastic energy absorbing block located at its bottom end is embedded in the protection chamber, a lower plug-in groove is arranged on the top surface of the elastic energy absorbing block, the bottom end of the VOCs detection body is movably plugged into the lower plug-in groove, and an adapting opening hole connected to the lower plug-in groove is arranged on the surface of the elastic energy absorbing block.

[0010] Preferably, the protective column block consists of an upper splicing body and a lower splicing body, the upper splicing body and the lower splicing body are butt-jointed together, the protective mechanism also includes a splicing socket, the splicing socket is arranged on the side of the upper splicing body, the protective mechanism also includes a splicing advancement block, the splicing advancement block is fixedly connected to the inner wall of the lower splicing body, the upper splicing body is sleeved on the outside of the splicing advancement block, a splicing rectangular cavity is opened inside the splicing advancement block, a bent spring sheet is fixedly connected to the right side surface of the inner cavity of the splicing rectangular cavity, a guide slide is slidably inserted into the interior of the splicing rectangular cavity, the end of the bent spring sheet abuts against the right side surface of the guide slide, a splicing protrusion is fixedly connected to the left side surface of the guide slide, and the splicing protrusion is movably inserted into the inside of the splicing socket.

[0011] Preferably, the collecting extension piece also includes a disc cavity, which is opened inside the collecting convex body, and a sealing elastic sleeve is fixedly embedded on the inner wall of the disc cavity, and a lower row of through holes located at its bottom are opened on the surface of the sealing elastic sleeve, a flip inner slit is opened at the upper right corner of the sealing elastic sleeve, and a flip outer slit is opened at the upper right corner of the collecting convex body, and the flip outer slit is connected with the flip inner slit, and a flip hollow disc is slidably inserted into the interior of the sealing elastic sleeve, and a docking through hole is opened on the left side of the flip hollow disc, and the docking through hole is adapted to the lower row of through holes, and a telescopic air pipe is fixedly connected to the right side of the flip hollow disc, and the right end of the telescopic air pipe passes through the flip inner slit and the flip outer slit, and the telescopic air pipe is slidably inserted into the inside of the flip inner slit and the flip outer slit, and the right end of the telescopic air pipe is fixedly sleeved with a limiting stop ring, and a collecting air pipe is fixedly inserted on the bottom surface of the inner cavity of the disc cavity, and the end face of the top of the collecting air pipe is flush with the inner wall of the disc cavity.

[0012] Preferably, the positioning and clamping mechanism also includes two positioning guide posts, both of which are located inside the positioning and clamping cavity, and the two positioning guide posts are respectively fixedly inserted on the upper and lower surfaces of the inner cavity of the positioning and clamping cavity, the top of a positioning guide post is fixedly connected to the bottom end of the collecting convex body, and anti-slip annular grooves are provided on the surfaces of the two positioning guide posts, and a spring accommodating groove is provided on the bottom surface of the positioning guide post at the top of the positioning and clamping cavity, the bottom end of the collecting gas pipe extends to the inside of the spring accommodating groove, and a pre-compression spring is fixedly connected to the top surface of the inner cavity of the spring accommodating groove, and two clamping movable posts are provided between the two positioning guide posts, and the two clamping movable posts are both slidably inserted into the interior of the positioning and clamping cavity, and guide sliding grooves are provided on the two end surfaces of the two clamping movable posts that are away from each other, and one end of the pre-compression spring extends to the corresponding guide sliding groove. The interior of the groove is fixedly connected to its inner wall, two positioning guide columns are slidably inserted into the interior of the two guide slide grooves respectively, an anti-slip boss is fixedly connected to the inner wall of the guide slide groove, and the other end of the anti-slip boss is slidably inserted into the interior of the anti-slip annular groove, and a gas transmission through hole is opened inside the positioning guide column at the bottom of the positioning clamping cavity, and the gas transmission through hole is connected with the collection through hole, and a plurality of cavity partition vertical bars are fixedly connected to the inner wall of the gas transmission through hole, and the plurality of cavity partition vertical bars are evenly distributed on the inner wall of the gas transmission through hole, and a load-bearing disk is movably inserted into the interior of the gas transmission through hole, and the side surface of the load-bearing disk is fixedly connected to the surface of the cavity partition vertical bar, and a gas transmission channel is formed between two adjacent cavity partition vertical bars, and a lifting spring is fixedly connected to the top surface of the load-bearing disk, and the top end of the lifting spring extends to the interior of another guide slide groove and is fixedly connected to the top surface of its inner cavity.

[0013] Preferably, the precise replacement structure also includes a limiting slide groove, which is arranged on the inner wall of the displacement slide hole. The precise replacement structure also includes an outward-turned annular chamfered surface, a tapered bevel groove and a gas buffer groove. The outward-turned annular chamfered surface, the tapered bevel groove and the gas buffer groove are all arranged on the clamping movable column. The two end surfaces of the two clamping movable columns close to each other are provided with outward-turned annular chamfered surfaces, tapered bevel grooves and gas buffer grooves. A breathable through hole is arranged on the inner wall of the gas buffer groove, and the purification disc is located between the two gas buffer grooves.

[0014] Preferably, the purification component also includes a circular groove, which is opened on the top surface of the purification disc, and the circular groove is filled with a circular filter disc. The circular groove is embedded with a closed pressure cover located on the top, and the closed pressure cover and the bottom surface of the purification disc are provided with clean air holes. The purification component also includes a thin outer and thick inner ring, which is fixedly sleeved on the outer side of the purification disc, and the tapered inclined groove is pressed on the inclined surface of the thin outer and thick inner ring.

[0015] Preferably, the storage mechanism also includes a sealing boss, which is inserted into the interior of the storage groove, a compression spring is fixedly connected to the bottom surface of the sealing boss, a locking round cap is fixedly connected to the top surface of the sealing boss, the locking round cap is pressed on the top surface of the protective column block, a round tube fastener is fixedly connected to the top surface of the locking round cap, and the round tube fastener is buckled onto the outside of the telescopic air pipe.

[0016] Preferably, the propulsion replacement mechanism also includes a power storage shaft, which is located inside the power storage disc cavity and movably sleeved on its inner wall, a power storage spring is movably sleeved on the outside of the power storage shaft, one end of the power storage spring is fixedly connected to the surface of the power storage shaft, and the other end of the power storage spring is fixedly connected to the inner wall of the power storage disc cavity, a power storage wire drum is fixedly sleeved on the outside of the power storage shaft, a transmission lead is wound around the outside of the power storage wire drum, a wire wheel body is provided on the line of the transmission lead, and the wire wheel body is movably installed inside the protective column block, the propulsion replacement mechanism also includes a displacement sliding cavity, the displacement sliding cavity is opened inside the protective column block and is located below the storage groove, a slit sliding hole is opened on the top surface of the inner cavity of the displacement sliding cavity, the slit sliding hole is communicated with the storage groove, the end of the transmission lead extends to the inside of the displacement sliding cavity and is fixedly connected to a directional sliding plug, the directional sliding plug is slidably inserted into the inside of the displacement sliding cavity, a directional sliding sheet is fixedly connected on the top surface of the directional sliding sheet, and the directional sliding sheet The top of the vehicle body passes through the slit sliding hole and is fixedly connected with a propulsion replacement plate, and the propulsion replacement plate is slidably inserted into the interior of the protective column block, and the left end of the propulsion replacement plate extends to the interior of the storage groove, and an arc groove is provided on the left end surface of the propulsion replacement plate, and the arc groove is flush with the inner wall of the storage groove, and a socket groove is provided on the arc groove, and the socket groove is adapted to the outer thin inner thick ring. The left side surface of the directional sliding plug is fixedly connected with an induction long line, and a steering fixed cavity is provided on the left side surface of the displacement sliding cavity, and a steering fixed wheel is installed in the steering fixed cavity, and the end of the induction long line passes through the steering fixed wheel and is connected to the wire-receiving fixed wheel, and the wire-receiving fixed wheel is movably installed in the interior of the protective column block, and a wire-receiving small wheel is fixedly connected to the wire-receiving fixed wheel, and a power lead is wound around the outside of the wire-receiving small wheel, and the other end of the power lead is provided with a driving wire wheel, which is movably installed in the interior of the protective column block, and a friction driving wheel is fixedly connected to the back of the driving wire wheel, and the friction driving wheel is movably inserted into the right side surface of the protective column block.

[0017] 3. Beneficial effects

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] ① The protective mechanism can provide better protection for the handheld detector, ensuring that the handheld VOCs online monitoring equipment will not be damaged during external force impact or falling collision, which helps to extend the service life of the handheld VOCs online monitoring equipment. Through the collection extension, the sampling tube and the handheld detector are designed as one piece, and no assembly is required, which saves time and effort, and the sampling tube will not be lost, ensuring the normal sampling work. The positioning and clamping mechanism can fix the purification component inside the handheld detector, so that the filter and the handheld detector are designed as one piece, and no assembly is required, which saves time and effort, and the filter will not be lost, further ensuring the normal sampling work, so that the sampling work will not be terminated due to the loss of parts, thereby improving the practicality of the handheld VOCs online monitoring equipment.

[0020] ② By collecting the extension piece, the handheld detector can be disconnected from the external environment when not working, preventing moisture or humidity from entering the handheld detector. The handheld detector can be isolated by the protective mechanism to further prevent water vapor or moisture from entering the handheld detector, which helps to extend the service life of the handheld VOCs online monitoring equipment. The positioning clamping mechanism allows the purification component to be replaced, and the storage mechanism can store additional purification components. The propulsion replacement mechanism can apply thrust to the purification component inside the storage mechanism, so that the purification component inside the storage mechanism can enter the precise replacement structure. The precise replacement structure can guide the purification component inside it so that it can be replaced in place, thereby achieving the purpose of replacing the purification component. The replacement method is simple and convenient, saving time and effort, and there is no need to carry additional scattered purification components, which improves the practicality of the handheld VOCs online monitoring equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 For the present invention Figure 1 Schematic diagram of the internal structure;

[0023] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the structure at center A;

[0024] Figure 4 For the present invention Figure 2 Schematic diagram of the structure of the handheld detector;

[0025] Figure 5 For the present invention Figure 2 A schematic diagram of the internal structure of the collection extension;

[0026] Figure 6 For the present invention Figure 5 Schematic diagram of the internal structure;

[0027] Figure 7 For the present invention Figure 6 Schematic diagram of the internal structure of the positioning clamping mechanism;

[0028] Figure 8 For the present invention Figure 6 Schematic diagram of the internal structure of the promotion and replacement agency;

[0029] Fig. 9 For the present invention Figure 7 A top view of the central gas transmission channel;

[0030] Fig.10 For the present invention Figure 6 A schematic diagram of the internal structure of the collection extension;

[0031] Fig.11 For the present invention Figure 8 Schematic diagram of the structure of the directional sliding plug;

[0032] Fig.12 For the present invention Fig.11 A top view of the internal structure of the middle propulsion replacement plate;

[0033] Fig.13 For the present invention Figure 6 Schematic diagram of the internal structure of the purification component.

[0034] Description of the numbers in the figure:

[0035] 1. Handheld detector; 11. VOCs detection body; 12. Display screen; 13. Control button; 14. Speaker; 15. Collection pipe; 2. Protection mechanism; 201. Protection column block; 202. Protection chamber; 203. Push groove; 204. Elastic push block; 205. Elastic buffer block; 206. Upper plug-in groove; 207. Collection through hole; 208. Elastic energy absorption block; 209. Lower plug-in groove; 210. Adaptation opening hole; 211. Upper splicing body; 212. Lower splicing body; 213. Splicing jack; 214. Splicing push block; 215. Splicing rectangular cavity; 216. Bending elastic 217, guide plug; 218, joint convex block; 3, collection extension; 301, collection convex body; 302, disc cavity; 303, sealing elastic sleeve; 304, lower row of through holes; 305, flip inner slit; 306, flip outer slit; 307, flip hollow disk; 308, docking through hole; 309, telescopic air pipe; 310, limit stop ring; 311, collection air pipe; 4, positioning clamping mechanism; 401, positioning clamping cavity; 402, positioning guide column; 403, anti-slip annular groove; 404, accommodating spring groove; 405, preload spring; 406, clamping active column; 407, guide slide Groove; 408, anti-slip convex head; 409, gas transmission hole; 410, compartment vertical bar; 411, load-bearing disc; 412, gas transmission channel; 413, lifting spring; 5, precise replacement structure; 51, displacement sliding hole; 52, limit sliding groove; 53, outward-turned annular chamfered surface; 54, tapered inclined groove; 55, gas buffer groove; 6, purification component; 61, purification disc; 62, circular groove; 63, circular filter; 64, closed gland; 65, clean air hole; 66, thin outer and thick inner ring; 7, storage mechanism; 71, storage groove; 72, sealing convex head; 73, compression spring; 74, locking round cap; 75. Round tube fastener; 8. Propulsion replacement mechanism; 801. Power storage disc cavity; 802. Power storage shaft; 803. Power storage spring; 804. Power storage reel; 805. Transmission lead wire; 806. Wire wheel body; 807. Displacement sliding cavity; 808. Slit sliding hole; 809. Directional sliding plug; 810. Directional sliding piece; 811. Propulsion replacement plate; 812. Circular arc groove; 813. Socket groove; 814. Driving long line; 815. Steering fixed cavity; 816. Steering fixed wheel; 817. Take-up fixed wheel; 818. Take-up small wheel; 819. Power lead wire; 820. Driving wire wheel; 821. Friction driving wheel. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0037] A handheld VOCs online monitoring device, including a handheld detector 1, see Figure 4 The handheld detector 1 includes a VOCs detector 11, a display screen 12 is provided on the surface of the VOCs detector 11, a control button 13 is provided on the surface of the VOCs detector 11 below the display screen 12, a speaker 14 is provided on the surface of the VOCs detector 11 below the control button 13, and a collection pipe 15 is connected to the top surface of the VOCs detector 11 at its left end. Figure 1 , a protective mechanism 2 is provided outside the VOCs detection body 11, please refer to Figure 2 The protection mechanism 2 includes a protection column block 201, a protection chamber 202 is provided inside the protection column block 201, a VOCs detection body 11 is located inside the protection chamber 202, and a collection extension 3 is provided on the top surface of the protection column block 201, see Figure 7 The collection extension member 3 includes a collection convex body 301, which is fixedly connected to the top surface of the protective column block 201 and is located at its left end. Figure 6 The protective column block 201 is provided with a positioning and clamping mechanism 4 inside, and the positioning and clamping mechanism 4 includes a positioning and clamping cavity 401, and the positioning and clamping cavity 401 is opened inside the protective column block 201 and is located directly below the collection convex body 301. The protective column block 201 is provided with a precise replacement structure 5, please refer to Figure 7 The precise replacement structure 5 includes a displacement slide hole 51, which is opened inside the protective column block 201. The left end of the displacement slide hole 51 is open and the opening is set on the left side of the protective column block 201. The displacement slide hole 51 divides the positioning clamping cavity 401 into two parts, the upper and lower parts, and the displacement slide hole 51 is connected to the positioning clamping cavity 401. Please refer to Figure 6 , the interior of the positioning and clamping cavity 401 is provided with a purification component 6, see Fig.13 The purification assembly 6 includes a purification disc 61, which is movably inserted into the interior of the positioning clamping cavity 401. Figure 6 The interior of the protective column block 201 is provided with a storage mechanism 7 and a propulsion replacement mechanism 8, see Figure 8The storage mechanism 7 includes a storage groove 71, which is opened on the top surface of the protective column block 201 and located at its right end. The right end of the displacement slide hole 51 is connected to the storage groove 71, and the bottom surface of the displacement slide hole 51 is flush with the bottom surface of the storage groove 71. The propulsion replacement mechanism 8 includes a force storage disc cavity 801, which is opened inside the protective column block 201 and located on the right side of the storage groove 71.

[0038] See also Figure 2 The protection mechanism 2 also includes a push groove 203, which is opened on the top surface of the inner cavity of the protection chamber 202 and is located at its left end. An elastic push block 204 is embedded in the push groove 203, and an elastic buffer block 205 is fixedly connected to the bottom end of the elastic push block 204. The elastic buffer block 205 is embedded in the interior of the protection chamber 202. Figure 4 The bottom surface of the elastic buffer block 205 is provided with an upper plug-in groove 206, the top of the VOCs detector 11 is movably plugged into the interior of the upper plug-in groove 206, and a collection through hole 207 is provided on the top surface of the inner cavity of the upper plug-in groove 206. The top of the collection through hole 207 penetrates the elastic propulsion block 204 upward, and the collection pipe 15 is movably plugged into the interior of the collection through hole 207. Please refer to Figure 2 The protective chamber 202 is embedded with an elastic energy absorbing block 208 at its bottom, see Figure 4 A lower plug-in groove 209 is provided on the top surface of the elastic energy absorbing block 208, and the bottom end of the VOCs detector 11 is movably plugged into the lower plug-in groove 209. Figure 2 The elastic energy absorbing block 208 has an adapting opening hole 210 on its surface which is connected to the lower plug-in groove 209. Figure 1 A transparent window is provided on the front of the protective column block 201. The transparent part on the transparent window can be made of soft material so that people can press the control button 13, or it can be made of hard material. In this case, the transparent part is installed in a detachable structure or a flip structure to provide better protection for the handheld detector 1, ensuring that the handheld VOCs online monitoring device will not be damaged during external force impact or falling collision, which helps to extend the service life of the handheld VOCs online monitoring device.

[0039] See also Figure 2 The protective column block 201 is composed of an upper splicing body 211 and a lower splicing body 212. The upper splicing body 211 and the lower splicing body 212 are butt-joined together. Figure 3The protective mechanism 2 also includes a splicing jack 213, which is provided on the side of the upper splicing body 211. The protective mechanism 2 also includes a splicing push block 214, which is fixedly connected to the inner wall of the lower splicing body 212. The upper splicing body 211 is sleeved on the outside of the splicing push block 214. The splicing push block 214 has a splicing rectangular cavity 215 formed inside. The right side surface of the inner cavity of the splicing rectangular cavity 215 is fixedly connected with a bent spring sheet 216. The inner wall of the splicing rectangular cavity 215 is provided with a splicing rectangular cavity 215. A guide plug 217 is slidably inserted into the handheld detector 1, and the end of the bent spring piece 216 is against the right side of the guide plug 217. A splicing protrusion 218 is fixedly connected to the left side of the guide plug 217. The splicing protrusion 218 is movably inserted into the inside of the splicing socket 213 to isolate the handheld detector 1, further preventing water vapor or moisture from entering the handheld detector 1, which helps to extend the service life of the handheld VOCs online monitoring equipment and facilitates the installation and disassembly of the handheld detector 1.

[0040] See also Fig.10 The collection extension 3 also includes a disc cavity 302, which is opened inside the collection convex body 301. A sealing elastic sleeve 303 is fixedly embedded on the inner wall of the disc cavity 302. A lower row of through holes 304 located at the bottom of the sealing elastic sleeve 303 are opened on the surface of the sealing elastic sleeve 303. A flip inner slit 305 is opened at the upper right corner of the sealing elastic sleeve 303. A flip outer slit 306 is opened at the upper right corner of the collection convex body 301. The flip outer slit 306 is connected to the flip inner slit 305. The sealing elastic sleeve 303 is slidably inserted into the interior of the flip hollow disk 307, and a docking through hole 308 is opened on the left side of the flip hollow disk 307, and the docking through hole 308 is adapted to the lower row of through holes 304. A telescopic air pipe 309 is fixedly connected to the right side of the flip hollow disk 307, and the right end of the telescopic air pipe 309 passes through the flip inner slit 305 and the flip outer slit 306. The telescopic air pipe 309 is slidably inserted into the inside of the flip inner slit 305 and the flip outer slit 306. Please refer to Figure 8 The right end of the telescopic air pipe 309 is fixedly sleeved with a limit stop ring 310, see Fig.10 A sampling gas tube 311 is fixedly inserted on the bottom surface of the inner cavity of the disc cavity 302, and the end face of the top of the sampling gas tube 311 is flush with the inner wall of the disc cavity 302, so that the sampling tube and the handheld detector 1 are designed as an integrated whole, and no assembly is required, which saves time and effort, and the sampling tube will not be lost, ensuring that the sampling work is carried out normally. At the same time, the handheld detector 1 can be disconnected from the external environment when not working, preventing moisture or humidity from entering the handheld detector 1.

[0041] See also Figure 7The positioning and clamping mechanism 4 also includes two positioning guide columns 402, both of which are located inside the positioning and clamping cavity 401. The two positioning guide columns 402 are fixedly inserted on the upper and lower surfaces of the inner cavity of the positioning and clamping cavity 401, respectively. The top of one positioning guide column 402 is fixedly connected to the bottom end of the collecting convex body 301, and the surfaces of the two positioning guide columns 402 are provided with anti-slip annular grooves 403. The bottom surface of the positioning guide column 402 at the top of the positioning and clamping cavity 401 is provided with a spring accommodating groove 404. The bottom end of the collecting gas pipe 311 extends to the inside of the spring accommodating groove 404, which accommodates A preload spring 405 is fixedly connected to the top surface of the inner cavity of the receiving spring groove 404, two clamping movable columns 406 are arranged between the two positioning guide columns 402, and the two clamping movable columns 406 are both slidably inserted into the interior of the positioning clamping cavity 401, and two end surfaces of the two clamping movable columns 406 that are away from each other are provided with guide grooves 407, one end of the preload spring 405 extends to the interior of the corresponding guide groove 407 and is fixedly connected to its inner wall, and the two positioning guide columns 402 are respectively slidably inserted into the interior of the two guide grooves 407, and the inner wall of the guide groove 407 is fixedly connected with a stopper protrusion 407. 08, the other end of the anti-slip protrusion 408 is slidably inserted into the anti-slip annular groove 403, and a gas transmission hole 409 is opened inside the positioning guide column 402 at the bottom of the positioning clamping cavity 401. The gas transmission hole 409 is connected with the collection hole 207. A plurality of cavity partition vertical bars 410 are fixedly connected to the inner wall of the gas transmission hole 409. The plurality of cavity partition vertical bars 410 are evenly distributed on the inner wall of the gas transmission hole 409. A bearing disc 411 is movably inserted into the gas transmission hole 409. The side of the bearing disc 411 is fixedly connected to the surface of the cavity partition vertical bar 410, and a space is formed between two adjacent cavity partition vertical bars 410. The air transmission channel 412 and the top surface of the load-bearing disk 411 are fixedly connected with a lifting spring 413, and the top end of the lifting spring 413 extends to the inside of another guide slide groove 407 and is fixedly connected to the top surface of its inner cavity, so that the purification component 6 can be replaced, and is used to fix the purification component 6 inside the handheld detector 1, so that the filter and the handheld detector 1 are designed as an integrated whole, and no assembly is required, which saves time and effort, and the filter will not be lost, further ensuring that the sampling work is carried out normally, so that the sampling work will not be interrupted due to the loss of parts, thereby improving the practicality of the handheld VOCs online monitoring equipment.

[0042] See also Figure 7The precise replacement structure 5 also includes a limiting slide groove 52, which is arranged on the inner wall of the displacement slide hole 51. The precise replacement structure 5 also includes an outward-turned annular chamfered surface 53, a tapered inclined groove 54 and a gas buffer groove 55. The outward-turned annular chamfered surface 53, the tapered inclined groove 54 and the gas buffer groove 55 are all arranged on the clamping movable column 406. The two end surfaces of the two clamping movable columns 406 that are close to each other are provided with outward-turned annular chamfered surfaces 53, tapered inclined grooves 54 and gas buffer grooves 55. The inner wall of the gas buffer groove 55 is provided with a breathable through hole. The purification disc 61 is located between the two gas buffer grooves 55, and guides the purification component 6 inside it so that it can be replaced in place, thereby achieving the purpose of replacing the purification component 6. The replacement method is simple and convenient, saving time and effort, and there is no need to carry additional scattered purification components 6, which improves the practicality of the handheld VOCs online monitoring equipment.

[0043] See also Fig.13 The purification component 6 also includes a circular groove 62, which is opened on the top surface of the purification disc 61. The circular groove 62 is filled with a circular filter 63. The circular groove 62 is embedded with a closed gland 64 located on the top. The closed gland 64 and the bottom surface of the purification disc 61 are both provided with clean air holes 65. The purification component 6 also includes a thin outer ring 66, which is fixedly sleeved on the outer surface of the purification disc 61. Please refer to Figure 7 The tapered inclined groove 54 is pressed on the inclined surface of the outer thin and inner thick ring 66 to filter the sample gas and play a protective role.

[0044] See also Figure 8 The storage mechanism 7 also includes a sealing protrusion 72, which is inserted into the interior of the storage groove 71, and a compression spring 73 is fixedly connected to the bottom surface of the sealing protrusion 72, and a locking round cap 74 is fixedly connected to the top surface of the sealing protrusion 72, and the locking round cap 74 is pressed on the top surface of the protective column block 201, and a round tube fastener 75 is fixedly connected to the top surface of the locking round cap 74, and the round tube fastener 75 is buckled on the outside of the telescopic air pipe 309. The interior of the storage groove 71 is filled with a plurality of purification components 6, and the plurality of purification components 6 are slidably inserted into the interior of the storage groove 71, and the plurality of purification components 6 are stacked together for storing additional purification components 6 so that the purification components 6 can be replaced in time.

[0045] See also Figure 8The propulsion replacement mechanism 8 also includes a power storage shaft 802, which is located inside the power storage disc cavity 801 and movably sleeved on its inner wall, and the outside of the power storage shaft 802 is movably sleeved with a power storage spring 803, one end of the power storage spring 803 is fixedly connected to the surface of the power storage shaft 802, and the other end of the power storage spring 803 is fixedly connected to the inner wall of the power storage disc cavity 801, and the outside of the power storage shaft 802 is fixedly sleeved with a power storage drum 804, and the outside of the power storage drum 804 is wound with a transmission lead 805, and the line of the transmission lead 805 is provided with a guide wire. The wire wheel body 806 is movably installed inside the protective column block 201. The propulsion replacement mechanism 8 also includes a displacement slide cavity 807. The displacement slide cavity 807 is opened inside the protective column block 201 and is located below the storage groove 71. A slit slide hole 808 is opened on the top surface of the inner cavity of the displacement slide cavity 807. The slit slide hole 808 is connected to the storage groove 71. The end of the transmission lead 805 extends to the interior of the displacement slide cavity 807 and is fixedly connected to a directional slide plug 809. The directional slide plug 809 is slidably inserted into the interior of the displacement slide cavity 807. Please refer to Fig.11 A directional slide 810 is fixedly connected to the top surface of the directional slide plug 809. The top of the directional slide 810 passes through the slit slide hole 808 and is fixedly connected to a propulsion replacement plate 811. The propulsion replacement plate 811 is slidably inserted into the interior of the protective column block 201. The left end of the propulsion replacement plate 811 extends to the interior of the receiving groove 71. An arc groove 812 is provided on the left end surface of the propulsion replacement plate 811. The arc groove 812 is flush with the inner wall of the receiving groove 71. A socket groove 813 is provided on the arc groove 812. The socket groove 813 is adapted to the outer thin inner thick ring 66. Please refer to Figure 8 The left side of the directional slide plug 809 is fixedly connected with a long guide wire 814, the left side of the displacement slide cavity 807 is provided with a steering fixed cavity 815, the interior of the steering fixed cavity 815 is provided with a steering fixed wheel 816, the end of the long guide wire 814 passes over the steering fixed wheel 816 and is connected with a take-up fixed wheel 817, and the take-up fixed wheel 817 is movably installed inside the protective column block 201, see Figure 5 A small wire-taking wheel 818 is fixedly connected to the wire-taking fixed wheel 817, and a power lead wire 819 is wound around the outside of the small wire-taking wheel 818. A driving wire wheel 820 is provided at the other end of the power lead wire 819. The driving wire wheel 820 is movably installed inside the protective column block 201. A friction driving wheel 821 is fixedly connected to the back side of the driving wire wheel 820. The friction driving wheel 821 is movably inserted into the right side surface of the protective column block 201, and is used to receive external force and drive the purification component 6 inside the storage mechanism 7 to move, so that the purification component 6 inside the storage mechanism 7 can enter the precise replacement structure 5.

[0046] Working principle:

[0047] First, when the handheld VOCs online monitoring device is hit or falls, the protective column block 201 is hit, and then the handheld detector 1 applies force to the elastic energy absorbing block 208, the elastic buffer block 205, and the elastic propulsion block 204 under the action of inertia force, so that the elastic propulsion block 204, the elastic buffer block 205, and the elastic energy absorbing block 208 are deformed accordingly and produce an energy absorbing effect, which plays a buffering role, thereby achieving the role of protecting the handheld detector 1, and then the handheld VOCs online monitoring device is moved to the detection point position, and then the telescopic air pipe 309 is flipped upward, and then the telescopic air pipe 309 is separated from the round tube fastener 75, and then the telescopic air pipe 309 is flipped counterclockwise inside the flip inner slit 305 and the flip outer slit 306, and then the telescopic air pipe 309 is flipped counterclockwise. 09 rotates the flip hollow disk 307 counterclockwise, and then the flip hollow disk 307 rotates counterclockwise with the docking through hole 308, and then the telescopic air pipe 309 is flipped inside the flip outer slit 306 to the extreme position. At this time, the lower row of through holes 304 are connected with the docking through holes 308, and then the telescopic air pipe 309 is stretched, and then the hand-held detector 1 is turned on. Then, the external sample gas passes through the telescopic air pipe 309, the flip hollow disk 307, the docking through hole 308, the lower row of through holes 304, the collection gas pipe 311, and the accommodating spring groove 404 under the drive of the hand-held detector 1 to enter the guide slide groove 407 above the purification component 6, and then the sample gas passes through the air permeable through hole, the gas buffer groove 55, the clean air through hole 65, and the circular filter 63 driven by the pressure difference to enter the purification group In the guide chute 407 below the component 6, the circular filter 63 filters the sample gas, and then the sample gas passes through the gas delivery hole 409, the gas delivery channel 412, the collection hole 207, and the collection pipe 15 to enter the handheld detector 1, and then the handheld detector 1 detects the sample gas. After the detection is completed, the handheld detector 1 is closed, and then the telescopic air pipe 309 is shortened and turned clockwise, and then the telescopic air pipe 309 turns clockwise with the flip hollow disk 307, and then the docking hole 308 is separated from the lower row of holes 304, and then the lower row of holes 304 is blocked by the flip hollow disk 307, and then the telescopic air pipe 309 is engaged with the inside of the round tube fastener 75, and then the handheld VOCs online monitoring device is moved to the next detection point and the above actions are repeated to complete the detection. When the purification component 6 needs to be replaced, the friction driving wheel 821 is driven by fingers to rotate upward, and then the friction driving wheel 821 drives the driving wire wheel 820 to rotate counterclockwise, and then the power lead 819 is wound around the outside of the driving wire wheel 820, and then the power lead 819 is released from the outside of the take-up wheel 818 and drives it to rotate, and then the take-up wheel 818 drives the take-up fixed wheel 817 to rotate clockwise, and then the long line 814 is driven to wind around the outside of the take-up fixed wheel 817, and then the long line 814 is driven to pull the directional sliding plug 809 to move left, and then the directional sliding plug 809 moves left with the propulsion replacement plate 811 through the directional sliding piece 810, and then the socket groove 813 is buckled on the outer thin and inner thick ring 66 and pushes the corresponding purification component 6 to slide left,This purification component 6 is the purification component 6 to be installed, and then the purification component 6 enters the displacement slide hole 51, and then the outer thin inner thick ring 66 slides to the inside of the limiting slide groove 52, and the purification disc 61 slides to the inside of the displacement slide hole 51, and then the purification disc 61 and the outer thin inner thick ring 66 slide in the displacement slide hole 51 and the limiting slide groove 52 respectively, and then the outer thin inner thick ring 66 contacts the outer thin inner thick ring 66 on the purification component 6 to be replaced and applies a leftward thrust to it, and then the outer thin inner thick ring 66 on the purification component 6 to be replaced slides to the left inside the limiting slide groove 52 and applies a thrust to the inclined surface of the tapered inclined surface groove 54, and then the two clamping active columns 406 move away from each other and squeeze the pre-compression spring 405 and the lifting spring 413, and then the pre-compression spring 405, The lifting spring 413 is elastically compressed, and the elastic potential energy increases. Then, the bottom surface of the clamping movable column 406 slides to the surface of the purification disc 61 and the closed gland 64, and then the purification component 6 to be installed is displaced between the two clamping movable columns 406, and the clamping movable column 406 slides on the surface of the corresponding purification disc 61 and the closed gland 64, and then the clamping movable column 406 slips off the surface of the purification component 6 to be replaced, and then the purification component 6 to be installed continues to move to the left and pushes the purification component 6 to be replaced to continue to move to the left, and then the purification component 6 to be replaced moves out from the left end of the displacement slide hole 51 so that people can directly take it out, and then the purification disc 61 on the purification component 6 to be installed is aligned with the gas buffer groove 55, and then the clamping movable column 406 is The preload spring 405 and the lifting spring 413 are clamped on the surface of the outer thin inner thick ring 66 under the action of the elastic force, and then the surface of the tapered inclined groove 54 applies a thrust to the surface of the outer thin inner thick ring 66 to move the outer thin inner thick ring 66 until the outer thin inner thick ring 66 is coaxial with the clamping movable column 406. At this time, the inner wall of the tapered inclined groove 54 is completely in contact with the surface of the outer thin inner thick ring 66, and the purification component 6 to be installed is installed in place. During this process, the directional sliding plug 809 pulls the transmission lead 805, and then the transmission lead 805 is released from the outside of the power storage wire drum 804 and drives the power storage shaft 802 to rotate, and then the power storage shaft 802 applies a torque to the power storage spring 803, and then the torsional potential energy of the power storage spring 803 increases, and when the purification component 6 to be installed is replaced in place After that, the friction driving wheel 821 is released, and then the power storage shaft 802 rotates in the opposite direction under the action of the torque of the power storage spring 803, and then the power storage shaft 802 rotates in the opposite direction with the power storage drum 804, and then the transmission lead 805 is wound around the outside of the power storage drum 804 and pulls the directional slide plug 809 to move to the right, and then the directional slide plug 809 moves to the right and resets with the propulsion replacement plate 811 through the directional slide 810, and then the directional slide plug 809 pulls the guide line 814, and then the guide line 814 is released from the outside of the take-up fixed wheel 817 and drives it to rotate counterclockwise, and then the take-up fixed wheel 817 rotates counterclockwise with the take-up small wheel 818, and then the power lead 819 is wound around the outside of the take-up small wheel 818 and released from the outside of the driving line wheel 820,Then, the driving wire wheel 820 drives the friction driving wheel 821 to rotate in the opposite direction under the drive of the power lead wire 819 until the directional sliding plug 809 moves rightward to the extreme position inside the displacement sliding cavity 807. At this time, the push-change plate 811 is completely reset, and then the purification component 6 inside the receiving groove 71 is seated on the bottom surface of the inner cavity of the receiving groove 71.

[0048] The above is only a preferred specific implementation manner of the present invention; but the protection scope of the present invention is not limited thereto; any technician familiar with the technical field within the technical scope disclosed by the present invention; any equivalent replacement or change based on the technical solution and improved concept of the present invention shall be covered by the protection scope of the present invention.

Claims

1. A handheld VOCs online monitoring device, comprising a handheld detector (1), characterized in that: The handheld detector (1) comprises a VOCs detector (11); a display screen (12) located at the top of the VOCs detector (11) is provided on the surface of the VOCs detector (11); a control button (13) located below the display screen (12) is provided on the surface of the VOCs detector (11); a speaker (14) located below the control button (13) is provided on the surface of the VOCs detector (11); a collection pipe (15) located at the left end of the VOCs detector (11) is connected to the top surface of the VOCs detector (11); and a protective mechanism (2) is provided on the outside of the VOCs detector (11); the protective mechanism (2) comprises a protective column block (201), a protective A protective chamber (202) is provided inside the protective column block (201), a VOCs detector (11) is located inside the protective chamber (202), a collection extension piece (3) is provided on the top surface of the protective column block (201), the collection extension piece (3) includes a collection convex body (301), the collection convex body (301) is fixedly connected to the top surface of the protective column block (201) and is located at the left end thereof, and a positioning clamping mechanism (4) is provided inside the protective column block (201), the positioning clamping mechanism (4) includes a positioning clamping cavity (401), the positioning clamping cavity (401) is provided inside the protective column block (201) and is located at the collection convex body (301). 01), a precision replacement structure (5) is provided inside the protective column block (201), the precision replacement structure (5) includes a displacement slide hole (51), the displacement slide hole (51) is opened inside the protective column block (201), the left end of the displacement slide hole (51) is open and the opening is provided on the left side surface of the protective column block (201), the displacement slide hole (51) divides the positioning clamping cavity (401) into two parts, the displacement slide hole (51) is connected to the positioning clamping cavity (401), and a purification component (6) is provided inside the positioning clamping cavity (401), and the purification component (6) includes a purification disc (61), and the purification disc (61 ) is movably plugged into the interior of the positioning clamping cavity (401), a storage mechanism (7) and a propulsion replacement mechanism (8) are provided inside the protective column block (201), the storage mechanism (7) comprises a storage groove (71), the storage groove (71) is opened on the top surface of the protective column block (201) and is located at the right end thereof, the right end of the displacement sliding hole (51) is connected to the storage groove (71), the bottom surface of the displacement sliding hole (51) is flush with the bottom surface of the storage groove (71), and the propulsion replacement mechanism (8) comprises a force storage disc cavity (801), the force storage disc cavity (801) is opened inside the protective column block (201) and is located on the right side of the storage groove (71); The protection mechanism (2) further comprises a propulsion groove (203), the propulsion groove (203) being arranged on the top surface of the inner cavity of the protection chamber (202) and being located at the left end thereof, an elastic propulsion block (204) being embedded in the propulsion groove (203), an elastic buffer block (205) being fixedly connected to the bottom end of the elastic propulsion block (204), the elastic buffer block (205) being embedded in the interior of the protection chamber (202), an upper plugging groove (206) being arranged on the bottom surface of the elastic buffer block (205), the top end of the VOCs detection body (11) being movably plugged into the interior of the upper plugging groove (206), and the upper plugging groove (206) being connected to the bottom end of the elastic buffer block (205). ) A collection through hole (207) is provided on the top surface of the inner cavity, the top of the collection through hole (207) penetrates the elastic propulsion block (204) upward, the collection connecting pipe (15) is movably plugged into the inside of the collection through hole (207), the inside of the protective chamber (202) is embedded with an elastic energy absorbing block (208) located at its bottom end, a lower plug-in groove (209) is provided on the top surface of the elastic energy absorbing block (208), the bottom end of the VOCs detection body (11) is movably plugged into the inside of the lower plug-in groove (209), and an adapting opening hole (210) communicating with the lower plug-in groove (209) is provided on the surface of the elastic energy absorbing block (208); The collection extension piece (3) further comprises a disc cavity (302), the disc cavity (302) being arranged inside the collection protrusion (301), a sealing elastic sleeve (303) being fixedly embedded on the inner wall of the disc cavity (302), a lower row of through holes (304) being arranged on the surface of the sealing elastic sleeve (303) and being located at the bottom thereof, a flip inner slit (305) being arranged at the upper right corner of the sealing elastic sleeve (303), a flip outer slit (306) being arranged at the upper right corner of the collection protrusion (301), the flip outer slit (306) being connected to the flip inner slit (305), a flip hollow disc (307) being slidably inserted inside the sealing elastic sleeve (303), and the flip hollow disc (307) being arranged to be rotated in a direction of rotation. ) is provided with a docking through hole (308) on the left side surface, the docking through hole (308) being matched with the lower row of through holes (304), a telescopic air pipe (309) is fixedly connected to the right side surface of the flip hollow disk (307), the right end of the telescopic air pipe (309) passes through the flip inner slit (305) and the flip outer slit (306), the telescopic air pipe (309) is slidably inserted into the inside of the flip inner slit (305) and the flip outer slit (306), the right end of the telescopic air pipe (309) is fixedly sleeved with a limit stop ring (310), a collection air pipe (311) is fixedly inserted into the bottom surface of the inner cavity of the disk cavity (302), and the end surface of the top of the collection air pipe (311) is flush with the inner wall of the disk cavity (302).

2. A handheld VOCs online monitoring device according to claim 1, characterized in that: The protective column block (201) is composed of an upper splicing body (211) and a lower splicing body (212), the upper splicing body (211) and the lower splicing body (212) being butt-joined together, the protective mechanism (2) further comprising a splicing jack (213), the splicing jack (213) being arranged on the side surface of the upper splicing body (211), the protective mechanism (2) further comprising a splicing push block (214), the splicing push block (214) being fixedly connected to the inner wall of the lower splicing body (212), the upper splicing body (211) being sleeved on the splicing push block (214), and the splicing push block (214) being fixedly connected to the inner wall of the lower splicing body (212). The splicing propulsion block (214) is provided with a splicing rectangular cavity (215) inside, a bent spring sheet (216) is fixedly connected to the right side surface of the inner cavity of the splicing rectangular cavity (215), a guide slide plug (217) is slidably inserted inside the splicing rectangular cavity (215), the end of the bent spring sheet (216) abuts against the right side surface of the guide slide plug (217), a splicing protrusion (218) is fixedly connected to the left side surface of the guide slide plug (217), and the splicing protrusion (218) is movably inserted inside the splicing socket (213).

3. A handheld VOCs online monitoring device according to claim 1, characterized in that: The positioning and clamping mechanism (4) further comprises two positioning guide posts (402), both of which are located inside the positioning and clamping cavity (401), and the two positioning guide posts (402) are respectively fixedly plugged into the upper and lower surfaces of the inner cavity of the positioning and clamping cavity (401), the top end of one positioning guide post (402) is fixedly connected to the bottom end of the collecting convex body (301), and the surfaces of the two positioning guide posts (402) are provided with anti-slip annular grooves (403), and the bottom surface of the positioning guide post (402) at the top of the positioning and clamping cavity (401) is provided with a spring accommodating groove (403). The bottom end of the gas collection pipe (311) extends to the inside of the spring groove (404), and a preload spring (405) is fixedly connected to the top surface of the inner cavity of the spring groove (404). Two clamping movable columns (406) are provided between the two positioning guide columns (402). The two clamping movable columns (406) are both slidably inserted into the inside of the positioning clamping cavity (401). The two end surfaces of the two clamping movable columns (406) that are away from each other are provided with guide grooves (407), and one end of the preload spring (405) extends to the inner surface of the corresponding guide groove (407). The inner wall of the guide slot (407) is fixedly connected to the inner wall of the guide slot (407), the two positioning guide posts (402) are respectively slidably inserted into the inside of the two guide slots (407), the inner wall of the guide slot (407) is fixedly connected with a stop-slip protrusion (408), the other end of the stop-slip protrusion (408) is slidably inserted into the inside of the stop-slip annular groove (403), and a gas transmission through hole (409) is opened inside the positioning guide post (402) at the bottom of the positioning clamping cavity (401), the gas transmission through hole (409) is connected to the collection through hole (207), and a plurality of cavity partition vertical bars ( 410), a plurality of cavity vertical bars (410) are evenly distributed on the inner wall of the gas transmission through hole (409), a load-bearing disc (411) is movably inserted inside the gas transmission through hole (409), the side of the load-bearing disc (411) is fixedly connected to the surface of the cavity vertical bar (410), a gas transmission channel (412) is formed between two adjacent cavity vertical bars (410), a lifting spring (413) is fixedly connected to the top surface of the load-bearing disc (411), and the top end of the lifting spring (413) extends to the inside of another guide slide groove (407) and is fixedly connected to the top surface of its inner cavity.

4. A handheld VOCs online monitoring device according to claim 3, characterized in that: The precise replacement structure (5) further comprises a limiting slide groove (52), the limiting slide groove (52) being arranged on the inner wall of the displacement slide hole (51), the precise replacement structure (5) further comprises an outward-turned annular chamfered surface (53), a tapered inclined groove (54) and a gas buffer groove (55), the outward-turned annular chamfered surface (53), the tapered inclined groove (54) and the gas buffer groove (55) being arranged on the clamping movable column (406), the outward-turned annular chamfered surface (53), the tapered inclined groove (54) and the gas buffer groove (55) being arranged on the two end surfaces of the two clamping movable columns (406) close to each other, the inner wall of the gas buffer groove (55) being arranged with a ventilating through hole, and the purification disc (61) being located between the two gas buffer grooves (55).

5. A handheld VOCs online monitoring device according to claim 4, characterized in that: The purification component (6) further comprises a circular groove (62), the circular groove (62) being formed on the top surface of the purification disc (61), the circular groove (62) being filled with a circular filter disc (63), the circular groove (62) being embedded with a closed gland (64) located at the top thereof, the closed gland (64) and the bottom surface of the purification disc (61) being provided with a clean air through hole (65), the purification component (6) further comprises an outer thin and inner thick ring (66), the outer thin and inner thick ring (66) being fixedly sleeved on the outer surface of the purification disc (61), the tapered inclined groove (54) being pressed on the inclined surface of the outer thin and inner thick ring (66).

6. A handheld VOCs online monitoring device according to claim 1, characterized in that: The storage mechanism (7) further comprises a sealing protrusion (72), the sealing protrusion (72) being inserted into the interior of the storage groove (71), a compression spring (73) being fixedly connected to the bottom surface of the sealing protrusion (72), a locking round cap (74) being fixedly connected to the top surface of the sealing protrusion (72), the locking round cap (74) being pressed onto the top surface of the protective column block (201), a round tube fastener (75) being fixedly connected to the top surface of the locking round cap (74), and the round tube fastener (75) being fastened to the outside of the telescopic air pipe (309).

7. A handheld VOCs online monitoring device according to claim 6, characterized in that: The propulsion replacement mechanism (8) further comprises a power storage shaft (802), the power storage shaft (802) being located inside the power storage disc cavity (801) and being movably sleeved on the inner wall thereof, a power storage spring (803) being movably sleeved on the outside of the power storage shaft (802), one end of the power storage spring (803) being fixedly connected to the surface of the power storage shaft (802), the other end of the power storage spring (803) being fixedly connected to the inner wall of the power storage disc cavity (801), a power storage wire drum (804) being fixedly sleeved on the outside of the power storage shaft (802), a transmission lead wire (805) being wound around the outside of the power storage wire drum (804), a wire wheel body (806) being provided on the line of the transmission lead wire (805), and the wire wheel body (806) being movably mounted on the anti-locking device. The propulsion replacement mechanism (8) further comprises a displacement sliding cavity (807) which is arranged inside the protection column block (201) and is located below the receiving groove (71). A slit sliding hole (808) is arranged on the top surface of the inner cavity of the displacement sliding cavity (807). The slit sliding hole (808) is communicated with the receiving groove (71). The end of the transmission lead wire (805) extends into the displacement sliding cavity (807) and is fixedly connected with a directional sliding plug (809). The directional sliding plug (809) is slidably inserted into the displacement sliding cavity (807). A directional sliding sheet (810) is fixedly connected to the top surface of the directional sliding plug (809). The top end of the directional sliding sheet (810) passes through the slit sliding hole (810). 808) and is fixedly connected with a propulsion replacement plate (811), the propulsion replacement plate (811) is slidably inserted into the interior of the protection column block (201), the left end of the propulsion replacement plate (811) extends to the interior of the receiving groove (71), a circular arc groove (812) is provided on the left end surface of the propulsion replacement plate (811), the circular arc groove (812) is flush with the inner wall of the receiving groove (71), a socket groove (813) is provided on the circular arc groove (812), the socket groove (813) is matched with the outer thin and inner thick ring (66), a driving long line (814) is fixedly connected to the left side surface of the directional sliding plug (809), a steering fixed cavity (815) is provided on the left side surface of the displacement sliding cavity (807), and the steering fixed cavity (815) A steering fixed wheel (816) is installed inside the protective column block (201), the end of the driving long line (814) passes around the steering fixed wheel (816) and is connected to the wire-receiving fixed wheel (817), the wire-receiving fixed wheel (817) is movably installed inside the protective column block (201), a wire-receiving small wheel (818) is fixedly connected to the wire-receiving fixed wheel (817), a power lead wire (819) is wound around the outside of the wire-receiving small wheel (818), a driving wire wheel (820) is provided at the other end of the power lead wire (819), the driving wire wheel (820) is movably installed inside the protective column block (201), a friction driving wheel (821) is fixedly connected to the back side of the driving wire wheel (820), and the friction driving wheel (821) is movably plugged into the right side surface of the protective column block (201).

Images