Two-way flue gas sampler for sampling corrosive gas

Abstract

The invention provides a two-way flue gas sampler for sampling corrosive gas, and belongs to the technical field of flue gas samplers, the two-way flue gas sampler for sampling corrosive gas comprises: a sampler main body; the pipe body assembly is arranged on the upper side of the sampler main body; the number of the placing grooves is two, and the two placing grooves are respectively formed in two sides of the surface of the sampler main body; the number of the sampling cylinders is two, and the two sampling cylinders are slidably connected into the two placement grooves respectively; the negative pressure assembly comprises a negative pressure cavity, an anti-backflow pipe, a catalysis channel, a catalysis cavity, an electric push rod and two sliding plates; the reaction assembly replaces a vacuum pump in a traditional sampling machine, corrosive gas is absorbed through negative pressure, corrosion of the corrosive gas to sealant in equipment is avoided, the maintenance frequency of the equipment is reduced, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of flue gas samplers, and in particular relates to a dual-path flue gas sampler for corrosive gas sampling. Background Art

[0002] Corrosive gas sampling is a crucial component of environmental monitoring and industrial safety. It aims to accurately collect highly corrosive gas samples for subsequent analysis. These gases typically include hydrogen chloride, hydrogen fluoride, sulfur dioxide, and ammonia. These gases are not only harmful to humans but can also damage sampling equipment. Therefore, the sampling process must strictly adhere to technical specifications and safety requirements. Before sampling, the appropriate sampling method and equipment must be selected based on the properties of the target gas. Common sampling methods include active and passive sampling. Active sampling uses a pump to extract the gas and is suitable for high-concentration scenarios or those requiring real-time monitoring. Passive sampling relies on gas diffusion and is suitable for long-term, low-concentration monitoring. Sampling equipment is typically made of corrosion-resistant materials, such as polytetrafluoroethylene (PTFE) or glass, to prevent reactions between the gas and the equipment. During sampling, ensure that the gas path is properly sealed to prevent leakage and external contamination. For gases that are readily soluble in water, bubble absorption can be used: the gas is passed into an absorption bottle filled with an absorption solution to dissolve and stabilize it. For poorly soluble gases, solid adsorbents such as silica gel or activated carbon can be used for adsorption. During the sampling process, parameters such as ambient temperature, humidity, and air pressure must be recorded for subsequent data correction. After sampling, samples should be sent to the laboratory for analysis as soon as possible to prevent volatilization or deterioration of the gases due to prolonged storage. Operators must wear protective equipment, such as gas masks and corrosion-resistant gloves, to ensure personal safety. Accuracy, safety, and representativeness are crucial for corrosive gas sampling. Each step must be rigorously executed to ensure the reliability and validity of the monitoring data, providing a scientific basis for environmental assessments and industrial safety.

[0003] In existing technologies, traditional corrosive gas sampling mainly relies on mechanical vacuum pumps or the Venturi effect to generate negative pressure. However, long-term exposure of the metal parts and rubber seals of the mechanical pump to acidic gases will cause severe corrosion, resulting in a decrease in the sealing performance of the pump body and reduced pumping efficiency, ultimately shortening the service life of the equipment. Summary of the Invention

[0004] The purpose of the present invention is to provide a dual-channel flue gas sampler for corrosive gas sampling, aiming to solve the problem in the existing technology that traditional corrosive gas sampling mainly relies on mechanical vacuum pumps or Venturi effect to generate negative pressure, but the metal parts and rubber seals of the mechanical pump will be severely corroded due to long-term contact with acidic gases, resulting in a decrease in the sealing performance of the pump body and the reduction of the exhaust efficiency, which ultimately shortens the service life of the equipment.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A dual-path flue gas sampler for corrosive gas sampling, comprising:

[0007] Sampler body;

[0008] a tube assembly, the tube assembly being arranged on the upper side of the sampler body;

[0009] There are two placement slots, which are respectively opened on both sides of the surface of the sampler body;

[0010] There are two sampling cylinders, which are slidably connected to the two placement slots respectively;

[0011] A negative pressure assembly, comprising a negative pressure chamber, an anti-backflow tube, a catalytic channel, a catalytic chamber, an electric push rod, and a sliding plate. Two sliding plates are provided. The negative pressure chamber is provided in the sampler body. The two sliding plates are both provided in the sampler body. The two anti-backflow tubes are both communicated with the negative pressure chamber. The two anti-backflow tubes are respectively connected to two sampling cylinders. The catalytic chamber and the catalytic channel are both provided in the sampler body. The catalytic channel is communicated with the catalytic chamber and the negative pressure chamber. The electric push rod is fixedly connected to the sampler body. The output end of the electric push rod movably passes through the inner wall of the catalytic chamber. The sliding plate is slidably connected to the inner wall of the catalytic chamber. The sliding plate is fixedly connected to the extended end of the electric push rod.

[0012] Copper sulfate particles are provided in the catalytic chamber, and sodium sulfite solution is provided in the negative pressure chamber. Sodium sulfite reacts with oxygen to generate negative pressure under the catalytic action of copper sulfate. The negative pressure acts on the sampling cylinder through the backflow prevention tube, so that negative pressure is generated in the sampling cylinder.

[0013] As a preferred solution of the present invention, the tube body assembly includes a sliding component and two groups of tube body components, the sliding component includes a sliding groove, a sliding seat, a sliding rod and a rotating block, and two sliding rods and two rotating blocks are provided. The sliding groove is opened on the upper surface of the sampler body, the two sliding rods are fixedly connected to the inner wall of the sliding groove, the sliding seat is slidably connected to the circumferential surface of the two sliding rods, the two rotating blocks are rotatably connected in the sliding seat, and the two groups of tube body components are connected to the sliding component.

[0014] As a preferred solution of the present invention, each group of the tube body parts includes a sleeve, a sampling tube, a filter tube, a bellows, a hose, a U-shaped tube and a sampling channel, the sleeve is fixedly connected to the rotating block, the sampling tube is slidably connected to the circumferential inner wall of the sleeve, the filter tube is fixedly connected to one end of the sampling tube, the bellows is fixedly connected to the lower part of the circumferential surface of the sleeve, the bellows is communicated with the sleeve, the hose is slidably connected to the lower surface of the sliding groove, the U-shaped tube is fixedly connected to the sampler body, one end of the U-shaped tube and the hose is fixed, the sampling channel is opened in the sampler body, the sampling channel is communicated with one of the sampling cylinders, and the sampling channel is communicated with one end of the U-shaped tube.

[0015] As a preferred solution of the present invention, a closing component is provided in the catalytic chamber, and the closing component includes a limiting slide, a first closing plate, a second closing plate and a closing spring. Two closing springs are provided, and the limiting slide is opened on the inner wall of the catalytic chamber. The first closing plate and the second closing plate are both slidably connected to the inner wall of the limiting slide. The two closing springs are respectively fixedly connected to the inner walls on both sides of the limiting slide. The two closing springs are respectively fixed to the surfaces of the first closing plate and the second closing plate. The adjacent surfaces of the first closing plate and the second closing plate are both set as inclined surfaces, and the surface of the sliding plate is provided with a protrusion matching the inclined surface.

[0016] As a preferred solution of the present invention, two groups of air intake connection components are provided in the sampler body, and the two groups of air intake connection components are both provided in the sampler body. The two groups of air intake connection components are respectively connected to the two sampling cylinders, and each group of air intake connection components includes a first embedding groove, a first embedding tube and two groups of first elastic components. The first embedding groove is opened in the sampler body, the first embedding groove is connected to the sampling channel, the first embedding tube is slidably connected in the first embedding groove, the first embedding tube is connected to the air inlet on the surface of the sampling cylinder, and the two groups of first elastic components are both opened in the sampler body, and the two groups of first elastic components are connected to the first embedding tube.

[0017] As a preferred solution of the present invention, each group of the first elastic components includes a first elastic groove, a first limiting rod, a first spring and a first connecting plate. The first elastic groove is opened in the sampler body, the first elastic groove is connected to the first embedded groove, the first limiting rod is fixedly connected to the inner walls on both sides of the first elastic groove, the first connecting plate is slidably connected to the circumferential surface of the first limiting rod, the first connecting plate is fixedly connected to the surface of the first embedded tube, and the first spring is sleeved on the circumferential surface of the first limiting rod.

[0018] As a preferred solution of the present invention, two groups of negative pressure connection components are provided in the sampler body, and the two groups of negative pressure connection components are respectively connected to the two sampling cylinders. Each group of the negative pressure connection components includes a second embedded tube and two groups of second elastic components. The second embedded tube is slidably connected to the circumferential inner wall of the anti-backflow tube, and the second embedded tube is connected to the negative pressure port of the sampling cylinder. The two groups of second elastic components are both provided in the sampler body, and the two groups of second elastic components are both connected to the second embedded tube.

[0019] As a preferred solution of the present invention, each group of the second elastic components includes a second elastic groove, a second connecting plate, a second limiting rod and a second spring. The second elastic groove is opened in the sampler body, the second elastic groove is connected to the anti-backflow pipe, the second limiting rod is fixedly connected to the inner wall of the second elastic groove, the second connecting plate is slidably connected to the circumferential surface of the second limiting rod, the second connecting plate is fixedly connected to the circumferential surface of the second embedded tube, and the second spring is sleeved on the circumferential surface of the second limiting rod.

[0020] As a preferred solution of the present invention, two first sealing plates are fixedly connected to the air inlets of the two sampling tubes, and second sealing plates are fixedly connected to the negative pressure ports of the two sampling tubes. Control components are provided on both sides of the surface of the sampler body, and each group of the control components includes a control groove, a control plate and a connecting groove. There are two connecting grooves, and the control grooves are opened on the surface of the sampler body. The two connecting grooves are opened on the inner wall of the control groove. The control plate is slidably connected to the inner walls of the two connecting grooves, and the control plate is fixed to the surface of one of the second embedded tubes and the first embedded tube.

[0021] As a preferred solution of the present invention, two disassembly grooves are provided on the surface of the sampler body, push plates are fixedly connected to the surfaces of the two sampling cylinders, the two push plates are respectively slidably connected to the two disassembly grooves, valve bodies are installed in the two backflow prevention tubes, and handles and handrails are respectively fixedly connected on both sides of the surface of the sampler body.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. In the present invention, the vacuum pump in the traditional sampling machine is replaced by the reaction component, and the corrosive gas is absorbed by negative pressure, thereby preventing the corrosive gas from corroding the sealant in the equipment, reducing the maintenance frequency of the equipment, and increasing the service life of the equipment.

[0024] 2. In the present invention, two sets of tube components are used for dual-path flue gas sampling, which are respectively used for sampling different corrosive gases, and the sampling type is no longer single.

[0025] 3. In the present invention, two groups of first elastic components are both provided in the sampler body, and both groups of first elastic components are connected to the first embedded tube; two groups of second elastic components are both provided in the sampler body, and both groups of second elastic components are connected to the second embedded tube; the first elastic components and the second elastic components are used to maintain stability during corrosive gas sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 This is a first perspective stereogram of the present invention;

[0028] Figure 2 This is a second perspective stereogram of the present invention;

[0029] Figure 3 This is a third perspective stereogram of the present invention;

[0030] Figure 4 A top view of the present invention;

[0031] Figure 5 is a side view of the present invention;

[0032] Figure 6 is a cross-sectional view of the present invention;

[0033] Figure 7 For the present invention Figure 6 A partial enlarged view of point A in the middle;

[0034] Figure 8 For the present invention Figure 6 A partial enlarged view of point B in the middle.

[0035] Figure: 1. Sampler body; 2. Sliding groove; 201. Sliding seat; 202. Sliding rod; 203. Rotating block; 204. Sleeve; 205. Sampling tube; 206. Filter tube; 207. Support; 3. Sampling tube; 301. Disassembly groove; 302. Push plate; 4. Handle; 401. Handrail; 5. Bellows; 501. Hose; 502. U-shaped tube; 503. Sampling channel; 6. Negative pressure chamber; 601. Backflow prevention tube; 602. Valve body; 603. Catalytic channel; 604. Limiting slide; 605. First closing plate; 606 , second closing plate; 607, closing spring; 608, catalytic chamber; 609, electric push rod; 610, sliding plate; 7, first embedded groove; 701, first embedded tube; 702, first elastic groove; 703, first limiting rod; 704, first spring; 705, first connecting plate; 8, second elastic groove; 801, second connecting plate; 802, second limiting rod; 803, second spring; 804, second embedded tube; 9, first sealing plate; 901, second sealing plate; 10, control groove; 1001, control plate; 1002, connecting groove. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] Example 1

[0038] See also Figures 1-8 , the present invention provides the following technical solutions:

[0039] A dual-path flue gas sampler for corrosive gas sampling, comprising:

[0040] Sampler body 1;

[0041] The tube body assembly is arranged on the upper side of the sampler body 1;

[0042] There are two placement slots, which are respectively opened on both sides of the surface of the sampler body 1;

[0043] There are two sampling tubes 3, which are slidably connected to the two placement slots respectively;

[0044] Negative pressure assembly, the negative pressure assembly includes a negative pressure chamber 6, an anti-backflow tube 601, a catalytic channel 603, a catalytic chamber 608, an electric push rod 609, and a sliding plate 610. Two sliding plates 610 are provided. The negative pressure chamber 6 is opened in the sampler body 1. The two sliding plates 610 are both opened in the sampler body 1. The two anti-backflow tubes 601 are communicated with the negative pressure chamber 6. The two anti-backflow tubes 601 are respectively connected to the two sampling cylinders 3. The catalytic chamber 608 and the catalytic channel 603 are both opened in the sampler body 1. The catalytic channel 603 is communicated with the catalytic chamber 608 and the negative pressure chamber 6. The electric push rod 609 is fixedly connected to the sampler body 1. The output end of the electric push rod 609 movably passes through the inner wall of the catalytic chamber 608. The sliding plate 610 is slidably connected to the inner wall of the catalytic chamber 608. The sliding plate 610 is fixedly connected to the extended end of the electric push rod 609;

[0045] Copper sulfate particles are provided in the catalytic chamber 608, and sodium sulfite solution is provided in the negative pressure chamber 6. Sodium sulfite reacts with oxygen to generate negative pressure under the catalytic action of copper sulfate. The negative pressure acts on the sampling cylinder 3 through the backflow prevention tube 601, so that negative pressure is generated in the sampling cylinder 3.

[0046] In a specific embodiment of the present invention, the sampler body 1 is supported by corrosion-resistant materials as a whole, the tube body assembly is used to dock with the position where corrosive gas needs to be collected, and the sampling tube 3 is installed in the placement groove. The sampling tube 3 is used to collect the corrosive gas absorbed by the collection device and to sample the corrosive gas; the negative pressure chamber 6 in the negative pressure assembly is used to store sodium sulfite solution, and the sodium sulfite solution reacts with oxygen and generates sodium sulfate under the catalysis of copper sulfate. During the process of generating sodium sulfate, the pressure in the container decreases, and the negative pressure acts on the sampling tube 3 through the anti-backflow tube 601. When negative pressure is generated in the sampling tube 3, the corrosive gas at the position where sampling is required is absorbed by the tube body assembly and the corrosive gas is absorbed into the sampling tube 3 for storage. Sulfuric acid is stored in the catalytic chamber 608 The copper particles are controlled by the operation of the electric push rod 609 to control the sliding plate 610 to slide in the catalytic chamber 608. When the catalytic chamber 608 moves, the copper sulfate particles pass through the first closing plate 605 and the second closing plate 606 into the catalytic channel 603, and roll along the circumferential inner wall of the catalytic channel 6 to the negative pressure chamber 6, and react with the sodium sulfite in the negative pressure chamber 6. In the process of corrosive gas continuously entering the sampling tube 3, the oxygen in the corrosive gas reacts with the sodium sulfite in the negative pressure chamber 6 to keep the reaction going. By using this device, the reaction component replaces the vacuum pump in the traditional sampling machine, and the corrosive gas is absorbed by negative pressure, which avoids the corrosion of the corrosive gas to the sealant in the equipment, reduces the maintenance frequency of the equipment, and increases the service life of the equipment.

[0047] For details, please refer to Figures 1-8The tube body assembly includes a sliding component and two groups of tube body components. The sliding component includes a sliding groove 2, a sliding seat 201, a sliding rod 202 and a rotating block 203. There are two sliding rods 202 and two rotating blocks 203. The sliding groove 2 is opened on the upper surface of the sampler body 1. The two sliding rods 202 are fixedly connected to the inner wall of the sliding groove 2. The sliding seat 201 is slidably connected to the circumferential surface of the two sliding rods 202. The two rotating blocks 203 are rotatably connected to the sliding seat 201. Both groups of tube body components are connected to the sliding component.

[0048] In this embodiment: a sliding seat 201 is slidably connected in the sliding groove 2 in the tube body component, the sliding rod 202 is used to limit the sliding seat 201, and the rotating block 203 is rotatably connected in the sliding seat 201. The rotating block 203 is used for two groups of tube body components. When the sliding seat 201 moves, it controls the position of the tube body component. When the rotating block 203 rotates, it adjusts the use angle of the tube body component to facilitate the docking of the tube body component with the position where corrosive gas needs to be sampled.

[0049] For details, please refer to Figures 1-8 Each group of tube body components includes a sleeve 204, a sampling tube 205, a filter tube 206, a bellows 5, a hose 501, a U-shaped tube 502 and a sampling channel 503. The sleeve 204 is fixedly connected to the rotating block 203, the sampling tube 205 is slidably connected to the circumferential inner wall of the sleeve 204, the filter tube 206 is fixedly connected to one end of the sampling tube 205, the bellows 5 is fixedly connected to the lower part of the circumferential surface of the sleeve 204, the bellows 5 is communicated with the sleeve 204, the hose 501 is slidably connected to the lower surface of the sliding groove 2, the U-shaped tube 502 is fixedly connected to the sampler body 1, and one end of the U-shaped tube 502 and the hose 501 are fixed. The sampling channel 503 is opened in the sampler body 1, the sampling channel 503 is communicated with one of the sampling cylinders 3, and the sampling channel 503 is communicated with one end of the U-shaped tube 502.

[0050] In this embodiment: the sampling tube 205 in the tube body component is slidably connected to the sleeve 204, and the filter tube 206 is used to filter the corrosive gas to prevent large particles in the gas from entering the device. When the sleeve 204 moves, it drives the hose 501 to move, and the hose 501 is deformed. The hose 501 slides out of the sliding groove 2. When the sleeve 204 rotates, the bellows 5 is deformed; the two groups of tube body components are used for dual-path flue gas sampling, which are used for sampling different corrosive gases respectively, and the sampling type is no longer single; two supports 207 are fixedly connected to the surface of the sampler body 1, and the supports 207 serve to support the sampling tube 205.

[0051] For details, please refer to Figures 1-8A closing component is provided in the catalytic chamber 608, and the closing component includes a limiting slide 604, a first closing plate 605, a second closing plate 606 and a closing spring 607. Two closing springs 607 are provided, and the limiting slide 604 is opened on the inner wall of the catalytic chamber 608. The first closing plate 605 and the second closing plate 606 are both slidably connected to the inner wall of the limiting slide 604. The two closing springs 607 are respectively fixedly connected to the inner walls on both sides of the limiting slide 604. The two closing springs 607 are respectively fixed to the surfaces of the first closing plate 605 and the second closing plate 606. The adjacent surfaces of the first closing plate 605 and the second closing plate 606 are both set as inclined surfaces, and the surface of the sliding plate 610 is provided with a protrusion matching the inclined surface.

[0052] In this embodiment: the closing component is used to prevent the sodium sulfite solution in the negative pressure chamber 6 from flowing back. The first closing plate 605 and the second closing plate 606 are respectively connected to the two closing springs 607. Under the elastic force of the two closing springs 607, the first closing plate 605 cooperates with the second closing plate 606 to complete the seal. When the electric push rod 609 is in operation, it drives the sliding plate 610 connected to its extended end to slide. The sliding plate 610 pushes the copper sulfate particles to move in the catalytic chamber 608. The sliding plate 610 pushes the copper sulfate particles to move, overcomes the elastic force of the two closing springs 607, and pushes the copper sulfate particles into the catalytic channel 603. The inclined surfaces provided on the surfaces of the first closing plate 605 and the second closing plate 606 facilitate the movement of the copper sulfate particles. The protrusions provided on the surface of the sliding plate 610 are used to push the copper sulfate particles to move, so that the copper sulfate particles can pass through the inclined surfaces of the first closing plate 605 and the second closing plate 606.

[0053] For details, please refer to Figures 1-8 Two groups of air intake connection components are provided in the sampler body 1, and the two groups of air intake connection components are both provided in the sampler body 1. The two groups of air intake connection components are respectively connected to the two sampling cylinders 3. Each group of air intake connection components includes a first embedded groove 7, a first embedded tube 701 and two groups of first elastic components. The first embedded groove 7 is opened in the sampler body 1, and the first embedded groove 7 is connected to the sampling channel 503. The first embedded tube 701 is slidably connected to the first embedded groove 7. The first embedded tube 701 is connected to the air inlet on the surface of the sampling cylinder 3. The two groups of first elastic components are both opened in the sampler body 1, and the two groups of first elastic components are connected to the first embedded tube 701.

[0054] In this embodiment: two groups of air intake connection components are respectively connected to the two sampling channels 503 and the sampling cylinder 3. The first embedded tube 701 moves into the sampling cylinder 3 under the action of the first elastic component. During this process, the first embedded tube 701 pushes the two first sealing plates 9, causing the first sealing plates 9 to deform. When the first embedded tube 701 is moved out of the air inlet in the sampling cylinder 3, the two first sealing plates 9 are closed, and the gas in the sampling cylinder 3 cannot be moved out of the sampling cylinder 3. The pressure of the corrosive gas input into the sampling cylinder 3 is constant, and the pressure of the corrosive gas will not overflow through the two first sealing plates 9.

[0055] For details, please refer to Figures 1-8 Each group of first elastic components includes a first elastic groove 702, a first limiting rod 703, a first spring 704 and a first connecting plate 705. The first elastic groove 702 is opened in the sampler body 1, and the first elastic groove 702 is connected to the first embedded groove 7. The first limiting rod 703 is fixedly connected to the inner walls on both sides of the first elastic groove 702. The first connecting plate 705 is slidably connected to the circumferential surface of the first limiting rod 703. The first connecting plate 705 is fixedly connected to the surface of the first embedded tube 701, and the first spring 704 is sleeved on the circumferential surface of the first limiting rod 703.

[0056] In this embodiment: the first limiting rod 703 in the first elastic component is fixedly connected to the first elastic groove 702, the first connecting plate 705 slides on the surface of the first limiting rod 703, and the elastic force of the first spring 704 indirectly drives the first embedded tube 701 to slide into the sampling cylinder 3. Through this elastic force, the first embedded tube 701 will not slide out of the sampling cylinder 3 during the connection process with the sampling cylinder 3, thereby maintaining the stability of gas collection.

[0057] For details, please refer to Figures 1-8 Two groups of negative pressure connection components are provided in the sampler body 1, and the two groups of negative pressure connection components are respectively connected to the two sampling cylinders 3. Each group of negative pressure connection components includes a second embedded tube 804 and two groups of second elastic components. The second embedded tube 804 is slidably connected to the circumferential inner wall of the anti-backflow tube 601, and the second embedded tube 804 is connected to the negative pressure port of the sampling cylinder 3. The two groups of second elastic components are both provided in the sampler body 1, and the two groups of second elastic components are both connected to the second embedded tube 804.

[0058] In this embodiment: the second embedded tube 804 of the negative pressure connection assembly passes through the second sealing plate 901 under the action of two groups of second elastic components, and the second embedded tube 804 is connected to the sampling cylinder 3. When the second embedded tube 804 is moved out of the negative pressure port in the sampling cylinder 3, it is closed under the elasticity of the second sealing plate 901.

[0059] For details, please refer to Figures 1-8Each group of second elastic components includes a second elastic groove 8, a second connecting plate 801, a second limiting rod 802 and a second spring 803. The second elastic groove 8 is opened in the sampler body 1, and the second elastic groove 8 is connected to the anti-backflow tube 601. The second limiting rod 802 is fixedly connected to the inner wall of the second elastic groove 8. The second connecting plate 801 is slidably connected to the circumferential surface of the second limiting rod 802. The second connecting plate 801 is fixedly connected to the circumferential surface of the second embedded tube 804. The second spring 803 is sleeved on the circumferential surface of the second limiting rod 802.

[0060] In this embodiment, the second limiting rod 802 in the second elastic component is used to limit the second connecting plate 801 , and the elastic force of the second spring 803 drives the second connecting plate 801 to move, and the second connecting plate 801 drives the second embedded tube 804 to move into the sampling cylinder 3 .

[0061] For details, please refer to Figures 1-8 Two first sealing plates 9 are fixedly connected to the air inlets of the two sampling cylinders 3, and second sealing plates 901 are fixedly connected to the negative pressure ports of the two sampling cylinders 3. Control components are provided on both sides of the surface of the sampler body 1. Each set of control components includes a control groove 10, a control board 1001 and a connecting groove 1002. There are two connecting grooves 1002. The control groove 10 is opened on the surface of the sampler body 1. The two connecting grooves 1002 are opened on the inner wall of the control groove 10. The control board 1001 is slidably connected to the inner walls of the two connecting grooves 1002. The control board 1001 is fixed to the surface of one of the second embedded tubes 804 and the first embedded tube 701.

[0062] In this embodiment: when the first embedded tube 701 slides to the air inlet in the sampling cylinder 3, the two first sealing plates 9 are deformed under the extrusion of the first embedded tube 701, and the second embedded tube 804 punctures the second sealing plate 901 when connected to the sampling cylinder 3. The negative pressure acts on the sampling cylinder 3 through the anti-backflow tube 601 and the second embedded tube 804. Before taking the sampling cylinder 3 out of the placement slot, push the control board 1001 to slide in the control slot 10. The control board 1001 drives the first embedded tube 701 and the second embedded tube 804 to slide out of the sampling cylinder 3. The second sealing plate 901 and the two first sealing plates 9 are closed. The first sealing plate 9 and the second sealing plate 901 are both made of corrosion-resistant materials.

[0063] For details, please refer to Figures 1-8 Two disassembly grooves 301 are provided on the surface of the sampler body 1, and push plates 302 are fixedly connected to the surfaces of the two sampling cylinders 3. The two push plates 302 are respectively slidably connected to the two disassembly grooves 301, and valve bodies 602 are installed in the two backflow prevention tubes 601. Handles 4 and handrails 401 are respectively fixedly connected on both sides of the surface of the sampler body 1.

[0064] In this embodiment, the sampling tube 3 can be easily taken out from the placement slot by pushing the push plate 302, and the handheld handle 4 can be easily moved. The valve body 602 is used to control the passage state in the anti-backflow tube 601, and the armrest 401 is convenient for holding.

[0065] The working principle and use process of the present invention are as follows: When the device is in use, the user wears protective clothing, holds the handle 4 to move the device to the target sampling position, pulls out part of the sampling tube 205 from the sleeve 204, slides the sliding seat 201 in the sliding groove 2, and rotates the rotating block 203 to adjust the angle of the sampling tube 205, then docks the filter tube 206 with the target sampling position, controls the operation of the electric push rod 609 in the negative pressure component, and the electric push rod 609 drives the sliding plate 610 to slide in the catalytic chamber 608, pushing the copper sulfate particles in the catalytic chamber 608 into the negative pressure chamber 6. Under the catalysis of copper sulfate, the sodium sulfate solution in the negative pressure chamber 6 reacts with oxygen to generate negative pressure, which opens the valve body 602. Open, negative pressure acts on the sampling cylinder 3 through the second embedded tube 804, and under the action of the negative pressure in the sampling cylinder 3, the corrosive gas enters the sampling cylinder 3 through the sampling tube 205, the sleeve 204, the bellows 5, the hose 501, the U-shaped tube 502 and the sampling channel 503, completing the sampling of the corrosive gas, and finally pushing the control board 1001 to drive the second embedded tube 804 and the first embedded tube 701 to slide out of the sampling cylinder 3, and finally taking the sampling cylinder 3 out of the placement slot; by using this device, the reaction component replaces the vacuum pump in the traditional sampling machine, and the corrosive gas is absorbed by negative pressure, thereby avoiding the corrosion of the sealant in the equipment by the corrosive gas, reducing the maintenance frequency of the equipment, and increasing the service life of the equipment.

[0066] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A dual-channel flue gas sampler for corrosive gas sampling, characterized in that: include: Sampler body (1); A tube assembly, the tube assembly being arranged on the upper side of the sampler body (1); There are two placement slots, which are respectively opened on both sides of the surface of the sampler body (1); Two sampling cylinders (3) are provided, and the two sampling cylinders (3) are slidably connected to the two placement grooves respectively; A negative pressure component, the negative pressure component includes a negative pressure chamber (6), an anti-backflow pipe (601), a catalytic channel (603), a catalytic chamber (608), an electric push rod (609), and a sliding plate (610), wherein two sliding plates (610) are provided, the negative pressure chamber (6) is opened in the sampler body (1), the two sliding plates (610) are both opened in the sampler body (1), the two anti-backflow pipes (601) are both connected to the negative pressure chamber (6), and the two anti-backflow pipes (601) are respectively connected to the two sampling tubes (3). The catalytic chamber (608) and the catalytic channel (603) are both opened in the sampler body (1), the catalytic channel (603) is connected to the catalytic chamber (608) and the negative pressure chamber (6), the electric push rod (609) is fixedly connected to the sampler body (1), the output end of the electric push rod (609) is movable through the inner wall of the catalytic chamber (608), the sliding plate (610) is slidably connected to the inner wall of the catalytic chamber (608), and the sliding plate (610) is fixedly connected to the extended end of the electric push rod (609); Copper sulfate particles are provided in the catalytic chamber (608), and a sodium sulfite solution is provided in the negative pressure chamber (6). Sodium sulfite reacts with oxygen to generate a negative pressure under the catalytic action of copper sulfate. The negative pressure acts on the sampling cylinder (3) through the backflow prevention tube (601), so that a negative pressure is generated in the sampling cylinder (3).

2. A dual-channel flue gas sampler for corrosive gas sampling according to claim 1, characterized in that: The tube body assembly includes a sliding component and two groups of tube body components, the sliding component includes a sliding groove (2), a sliding seat (201), a sliding rod (202) and a rotating block (203), and two sliding rods (202) and two rotating blocks (203) are provided. The sliding groove (2) is opened on the upper surface of the sampler body (1), and the two sliding rods (202) are fixedly connected to the inner wall of the sliding groove (2). The sliding seat (201) is slidably connected to the circumferential surface of the two sliding rods (202), and the two rotating blocks (203) are rotatably connected in the sliding seat (201). The two groups of tube body components are connected to the sliding component.

3. A dual-channel flue gas sampler for corrosive gas sampling according to claim 2, characterized in that: Each group of the tube body parts includes a sleeve (204), a sampling tube (205), a filter tube (206), a bellows (5), a hose (501), a U-shaped tube (502) and a sampling channel (503); the sleeve (204) is fixedly connected to the rotating block (203); the sampling tube (205) is slidably connected to the circumferential inner wall of the sleeve (204); the filter tube (206) is fixedly connected to one end of the sampling tube (205); the bellows (5) is fixedly connected to the circumference of the sleeve (204); At the lower part of the surface, the bellows (5) is connected to the sleeve (204), the hose (501) is slidably connected to the lower surface of the sliding groove (2), the U-shaped tube (502) is fixedly connected to the sampler body (1), and one end of the U-shaped tube (502) and the hose (501) is fixed to the sampling channel (503) opened in the sampler body (1), the sampling channel (503) is connected to one of the sampling cylinders (3), and the sampling channel (503) is connected to one end of the U-shaped tube (502).

4. A dual-channel flue gas sampler for corrosive gas sampling according to claim 3, characterized in that: A closing component is provided in the catalytic chamber (608), and the closing component includes a limiting slide (604), a first closing plate (605), a second closing plate (606) and a closing spring (607). Two closing springs (607) are provided. The limiting slide (604) is opened on the inner wall of the catalytic chamber (608). The first closing plate (605) and the second closing plate (606) are both slidably connected to the inner wall of the limiting slide (604). The two closing springs (607) are respectively fixed to the inner walls on both sides of the limiting slide (604). The two closing springs (607) are respectively fixed to the surfaces of the first closing plate (605) and the second closing plate (606). The adjacent surfaces of the first closing plate (605) and the second closing plate (606) are both set as inclined surfaces, and the surface of the sliding plate (610) is provided with a protrusion matching the inclined surface.

5. The dual-channel flue gas sampler for corrosive gas sampling according to claim 4, characterized in that: Two groups of air intake connection components are provided in the sampler body (1), and both groups of air intake connection components are provided in the sampler body (1). The two groups of air intake connection components are connected to the two sampling cylinders (3) respectively. Each group of air intake connection components includes a first embedding groove (7), a first embedding tube (701) and two groups of first elastic components. The first embedding groove (7) is provided in the sampler body (1), the first embedding groove (7) is communicated with the sampling channel (503), the first embedding tube (701) is slidably connected in the first embedding groove (7), the first embedding tube (701) is connected to the air intake on the surface of the sampling cylinder (3), and the two groups of first elastic components are provided in the sampler body (1), and the two groups of first elastic components are connected to the first embedding tube (701).

6. The dual-channel flue gas sampler for corrosive gas sampling according to claim 5, characterized in that: Each group of the first elastic components includes a first elastic groove (702), a first limiting rod (703), a first spring (704) and a first connecting plate (705), wherein the first elastic groove (702) is provided in the sampler body (1), the first elastic groove (702) is communicated with the first embedding groove (7), the first limiting rod (703) is fixedly connected to the inner walls on both sides of the first elastic groove (702), the first connecting plate (705) is slidably connected to the circumferential surface of the first limiting rod (703), the first connecting plate (705) is fixedly connected to the surface of the first embedding tube (701), and the first spring (704) is sleeved on the circumferential surface of the first limiting rod (703).

7. The dual-channel flue gas sampler for corrosive gas sampling according to claim 6, characterized in that: Two groups of negative pressure connection components are provided in the sampler body (1), and the two groups of negative pressure connection components are connected to the two sampling cylinders (3) respectively. Each group of the negative pressure connection components includes a second embedded tube (804) and two groups of second elastic components. The second embedded tube (804) is slidably connected to the circumferential inner wall of the anti-backflow tube (601). The second embedded tube (804) is connected to the negative pressure port of the sampling cylinder (3). The two groups of second elastic components are both provided in the sampler body (1), and the two groups of second elastic components are both connected to the second embedded tube (804).

8. The dual-channel flue gas sampler for corrosive gas sampling according to claim 7, characterized in that: Each group of the second elastic components includes a second elastic groove (8), a second connecting plate (801), a second limiting rod (802) and a second spring (803), the second elastic groove (8) is opened in the sampler body (1), the second elastic groove (8) is connected to the anti-backflow tube (601), the second limiting rod (802) is fixedly connected to the inner wall of the second elastic groove (8), the second connecting plate (801) is slidably connected to the circumferential surface of the second limiting rod (802), the second connecting plate (801) is fixedly connected to the circumferential surface of the second embedded tube (804), and the second spring (803) is sleeved on the circumferential surface of the second limiting rod (802).

9. The dual-channel flue gas sampler for corrosive gas sampling according to claim 8, characterized in that: Two first sealing plates (9) are fixedly connected to the air inlets of the two sampling cylinders (3), and two second sealing plates (901) are fixedly connected to the negative pressure ports of the two sampling cylinders (3). Control components are provided on both sides of the surface of the sampler body (1), and each group of the control components includes a control groove (10), a control plate (1001) and a connecting groove (1002). There are two connecting grooves (1002). The control groove (10) is opened on the surface of the sampler body (1), and the two connecting grooves (1002) are opened on the inner wall of the control groove (10). The control plate (1001) is slidably connected to the inner walls of the two connecting grooves (1002). The control plate (1001) is fixed to the surface of one of the second embedded tubes (804) and the first embedded tube (701).

10. The dual-channel flue gas sampler for corrosive gas sampling according to claim 9, characterized in that: Two disassembly grooves (301) are provided on the surface of the sampler body (1), and push plates (302) are fixedly connected to the surfaces of the two sampling cylinders (3). The two push plates (302) are respectively slidably connected to the two disassembly grooves (301), and valve bodies (602) are respectively installed in the two anti-backflow pipes (601). Handles (4) and handrails (401) are respectively fixedly connected to the two sides of the surface of the sampler body (1).

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