A smoke sampler

Abstract

The present invention discloses a smoke sampler, comprising: a first connecting pipe, one end of which is fixed to a sampling hole in a flue wall; a gate valve, one side of which is detachably connected to the other end of the first connecting pipe; a second connecting pipe, one end of which is detachably connected to the other side of the gate valve; a first electric heating sleeve, which passes through the second connecting pipe, the gate valve, the first connecting pipe, and the flue wall and extends into the flue, the first electric heating sleeve being fixed with a rubber sealing plug, the rubber sealing plug being sealedly connected to the other end of the second connecting pipe; a sampling tube, which passes through the first electric heating sleeve and extends into the flue; a smoke sampling filter cartridge, the inlet of which is connected to the other end of the sampling tube; a cooling assembly, the inlet of which is connected to the outlet of the smoke sampling filter cartridge; a sampling pump, the inlet of which is connected to the outlet of the cooling assembly; and a sampling control unit, which is electrically connected to both the first electric heating sleeve and the sampling pump. The sampler can effectively prevent carbon monoxide leakage, has high safety, and high sampling accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of steel plant converter flue gas sampling devices, and more particularly to a smoke sampler. Background Art

[0002] In the field of environmental monitoring, a sampler is required to sample smoke and flue gas from fixed pollution sources such as flues. When sampling smoke and flue gas, the smoke sampling tube is inserted into the flue through the sampling hole on the flue to collect the sample. For example, a traditional sampler (see Figure 1 ), which consists of a filter cartridge, a sampling tube, a condenser, a thermometer, a dryer, a vacuum pressure gauge, a rotor flowmeter, a cumulative flowmeter, a regulating valve, and a sampling pump. The traditional sampler directly extends the sampling tube into the flue through the sampling hole on the flue. Since it cannot be well sealed with the flue during sampling, it is easy to cause carbon monoxide leakage, which endangers the safety of the sampling personnel. In addition, the sampling pump in the smoke sampler is an integrated structure with the main unit. High-concentration carbon monoxide easily accumulates in the main unit case. When the sampling lasts for a long time, it is very easy to cause the sampling pump to ignite and explode, causing damage to the instrument and personal injury. Moreover, due to the high moisture content of the flue gas, the dryer is made of glass fiber material and is very easy to get wet. The wet filter cartridge is easily damaged by the suction force of the sampling pump, resulting in a poor effect of the filter cartridge in intercepting dust in the flue gas. The pollutants are seriously lost during the sampling process, causing the sampling results to deviate seriously from the actual value and the sampling accuracy is poor.

[0003] Therefore, how to provide a smoke sampler that can effectively prevent carbon monoxide leakage, has high safety, and high sampling accuracy is a problem that technical personnel in this field urgently need to solve. Summary of the Invention

[0004] In view of this, the present invention provides a smoke sampler which can effectively prevent carbon monoxide leakage, has high safety and high sampling accuracy.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A smoke sampler, comprising:

[0007] a first connecting pipe, one end of which is fixedly connected to the sampling hole on the flue wall;

[0008] a gate valve, wherein a pipe opening on one side of the gate valve is detachably connected to the other end of the first connecting pipe;

[0009] a second connecting pipe, one end of which is detachably connected to the pipe opening on the other side of the gate valve;

[0010] a first electric heating sleeve, one end of which passes through the second connecting pipe, the gate valve, the first connecting pipe, and the flue wall to extend into the flue, and a rubber sealing plug is fixed to the other end of the first electric heating sleeve, the rubber sealing plug is sealed to the other end of the second connecting pipe, and a through hole is formed in the rubber sealing plug;

[0011] A sampling tube, wherein one end of the sampling tube is provided with a sampling nozzle, which passes through the through hole and the tube mouth of the first electric heating sleeve and extends into the flue, and the other end of the sampling tube extends outward from the first through hole;

[0012] A smoke sampling filter cartridge, the inlet end of which is connected to the other end of the sampling tube;

[0013] A cooling assembly, wherein the inlet of the cooling assembly is connected to the outlet end of the smoke sampling filter cartridge;

[0014] a sampling pump, wherein the inlet of the sampling pump is connected to the outlet of the cooling assembly;

[0015] A sampling control unit is electrically connected to the first electric heating sleeve and the sampling pump.

[0016] Through the above technical solution, it can be known that compared with the prior art, the present invention discloses a smoke sampler. Since a gate valve is provided on the flue wall, when installing the sampling tube, the gate valve is first closed to prevent the smoke in the flue from leaking. Then the sampling tube is passed through the pipe mouth of the first electric heating sleeve, and the first electric heating sleeve is plugged into the pipe mouth of the second connecting pipe. Then the gate valve is opened, and then the first electric heating sleeve is quickly pushed inwards into the flue together with the sampling tube, and the pipe mouth of the second connecting pipe is sealed with a rubber sealing plug to prevent smoke leakage. Then the sampling control unit controls the first electric heating sleeve and the sampling pump to work, and the flue Under the suction of the sampling pump, the flue gas enters the sampling tube. The sampling tube is heated to above 100°C by the first electric heating sleeve, causing the water in the flue gas to flow through the sampling tube in the form of water vapor, preventing water accumulation in the sampling tube and affecting the fluidity of the flue gas in the sampling tube. The flue gas passes through the sampling tube and enters the smoke sampling filter cartridge, which intercepts the dust in the flue gas. The flue gas then enters the cooling assembly for cooling, condensing the water in the flue gas into water, achieving gas-water separation and preventing water from entering the sampling pump and damaging it. The gas then enters the sampling pump and is finally collected by a gas collection bag. Therefore, the sampler uses a gate valve and a rubber sealing plug to seal the pipeline, which can prevent carbon monoxide in the flue gas from leaking, thereby ensuring the safety of the sampler. The sampling pump and sampling control unit are separated, that is, they are not integrated into the same main chassis, which prevents high concentrations of carbon monoxide from accumulating in the main chassis and causing the risk of explosion when the sampling pump ignites, greatly improving user safety.

[0017] Furthermore, the pipe opening on one side of the gate valve is detachably connected to the other end of the first connecting pipe through a first connecting flange; one end of the second connecting pipe is detachably connected to the pipe opening on the other side of the gate valve through a second connecting flange.

[0018] The beneficial effect of adopting the above technical solution is that it facilitates the rapid disassembly and assembly of the gate valve.

[0019] Furthermore, the rubber sealing plug is connected to the other end of the second connecting pipe in a conical sealing manner.

[0020] The beneficial effect of adopting the above technical solution is that the rubber sealing plug and the second connecting pipe have good sealing performance, avoiding the danger caused by smoke overflow.

[0021] Furthermore, a two-way ball valve is provided at the other end of the sampling tube, and a ferrule-type joint is provided between the two-way ball valve and the smoke sampling filter cartridge.

[0022] The beneficial effect of adopting the above technical solution is that the upstream components and the downstream components of the two-way ball valve are detachable, thereby facilitating the transportation of the sampler.

[0023] Furthermore, the smoke sampling filter cartridge includes:

[0024] a second electric heating sleeve, the second electric heating sleeve being electrically connected to the sampling control unit, one end of the second electric heating sleeve being connected to the two-way ball valve via the ferrule joint, the other end of the second electric heating sleeve being connected to the inlet of the cooling assembly, and a filter cartridge groove being provided on the inner wall of the second electric heating sleeve;

[0025] A filter cartridge is placed in the second electric heating sleeve and embedded in the filter cartridge groove.

[0026] The beneficial effect of the above technical solution is that when smoke with a high moisture content passes through the filter cartridge, the second electric heating sleeve can further heat the smoke, preventing the smoke with a high moisture content from condensing into water on the filter cartridge and soaking the filter cartridge. A soaked filter cartridge is easily damaged by the suction force of the sampling pump, resulting in a poor filter cartridge's ability to retain dust in the smoke, a serious loss of pollutants during the sampling process, and a serious deviation from the actual value of the sampling results, resulting in poor sampling accuracy. Therefore, heating the filter cartridge can ensure that the filter cartridge does not get soaked and damaged, thereby ensuring that the filter cartridge can normally intercept dust in the smoke, resulting in accurate smoke dust sampling results.

[0027] Furthermore, the cooling assembly includes:

[0028] a metal radiator, wherein the inlet of the metal radiator is fixedly connected to the other end of the second electric heating sleeve;

[0029] a semiconductor refrigerator, wherein the inlet of the semiconductor refrigerator is connected to the outlet of the metal radiator, the outlet of the semiconductor refrigerator is connected to the inlet of the sampling pump, and the semiconductor refrigerator is electrically connected to the sampling control unit;

[0030] A condensed water bottle, the bottle mouth of which is connected to the condensed water outlet of the semiconductor refrigerator.

[0031] The beneficial effect of adopting the above technical solution is that the flue gas filtered by the filter cartridge enters the metal radiator for primary cooling, and then undergoes secondary cooling by the semiconductor refrigerator, so that the water vapor in the flue gas is quickly condensed into water and flows into the condensed water bottle for collection, thereby preventing the condensed water from entering the sampling pump and causing damage to the sampling pump.

[0032] Furthermore, it also includes a thermocouple temperature sensor, a Pitot tube pressure sensor and a flow meter, all of which are electrically connected to the sampling control unit. The tube rod of the thermocouple temperature sensor is passed through the tube wall of the first electric heating sleeve, and the probe of the thermocouple temperature sensor extends into the flue; the Pitot tube pressure sensor is passed through the tube wall of the first electric heating sleeve, and the probe on it extends into the flue; the flow meter is arranged on the sampling tube.

[0033] The beneficial effect of adopting the above technical solution is that the sampling control unit (sampling host) can collect the pressure, temperature and flow data of the flue gas in the flue, and can provide data reference for sampling.

[0034] Furthermore, the outer wall of the pipe rod is wrapped with a heat insulation layer.

[0035] The beneficial effect of adopting the above technical solution is to prevent the thermocouple temperature sensor from being affected by the heating of the first electric heating sleeve, thereby ensuring that the measured smoke temperature is accurate and effective.

[0036] Furthermore, the sampling pump is an explosion-proof pump.

[0037] The beneficial effect of adopting the above technical solution is that the sampling pump is explosion-proof, thereby improving the safety of sampling personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0039] Figure 1 The accompanying drawing is a schematic structural diagram of a traditional sampler.

[0040] Figure 2 The accompanying drawing is a structural schematic diagram of a smoke sampler provided by the present invention.

[0041] Figure 3 The accompanying drawing is a schematic diagram of the connection structure between the gate valve and the first connecting pipe and the second connecting pipe.

[0042] Figure 4 The accompanying drawing is a schematic structural diagram of the sampling tube, thermocouple temperature sensor, and Pitot tube pressure sensor arranged in the first electric heating sleeve.

[0043] Figure 5 The accompanying drawing is a schematic structural diagram of the smoke sampling filter cartridge. DETAILED DESCRIPTION

[0044] 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.

[0045] See also Figure 2-Figure 5 , an embodiment of the present invention discloses a smoke sampler, comprising:

[0046] A first connecting pipe 1, one end of which is fixedly connected to a sampling hole on a flue wall 100;

[0047] A gate valve 2, wherein a pipe opening on one side of the gate valve 2 is detachably connected to the other end of the first connecting pipe 1;

[0048] A second connecting pipe 3, one end of which is detachably connected to the pipe opening on the other side of the gate valve 2;

[0049] A first electric heating sleeve 4, one end of which passes through the second connecting pipe 3, the gate valve 2, the first connecting pipe 1, and the flue wall 100 and extends into the flue. A rubber sealing plug 5 is fixed to the other end of the first electric heating sleeve 4. The rubber sealing plug 5 is sealed with the other end of the second connecting pipe 3. A through hole is provided in the rubber sealing plug 5. The outer diameter of the first electric heating sleeve 4 is slightly smaller than the inner diameters of the first connecting pipe 1, the gate valve 2, and the second connecting pipe 3, so that the first electric heating sleeve 4 can be inserted into the flue;

[0050] A sampling tube 6, one end of which is provided with a sampling nozzle 61, which passes through the through hole and the tube mouth of the first electric heating sleeve 4 and extends into the flue, and the other end of the sampling tube 6 extends outward from the first through hole;

[0051] A smoke sampling filter cartridge 7, the inlet end of which is connected to the other end of the sampling tube 6;

[0052] A cooling component 8, wherein the inlet of the cooling component 8 is connected to the outlet end of the smoke sampling filter cartridge 7;

[0053] The sampling pump 9 is an explosion-proof pump, and its outlet is connected to the outlet of the cooling assembly 8;

[0054] The sampling control unit 10 is electrically connected to the first electric heating sleeve 4 and the sampling pump 9. The sampling control unit 10 is a sampling host, which can be a control component such as a computer or a single chip microcomputer.

[0055] In a preferred embodiment, the pipe opening on one side of the gate valve 2 is detachably connected to the other end of the first connecting pipe 1 through a first connecting flange 11; one end of the second connecting pipe 3 is detachably connected to the pipe opening on the other side of the gate valve 2 through a second connecting flange 12.

[0056] In a preferred embodiment, the rubber sealing plug 5 is of a conical structure and is conically sealed to the other end of the second connecting pipe 3 , so that the rubber sealing plug and the second connecting pipe have good sealing performance.

[0057] In a preferred embodiment, a two-way ball valve 13 is provided at the other end of the sampling tube 6, and a ferrule joint 14 is provided between the two-way ball valve 13 and the smoke sampling filter cartridge 7. When the smoke sampling filter cartridge needs to be replaced, the two-way ball valve is preferably closed to prevent positive pressure carbon monoxide gas from leaking through the sampling tube, ensuring safety. In addition, the provision of the ferrule joint 14 allows the components upstream and downstream of the ferrule joint 14 to be detachable, facilitating packaging and transportation.

[0058] In a preferred embodiment, the smoke sampling filter cartridge 7 includes:

[0059] A second electric heating sleeve 71 is electrically connected to the sampling control unit 10. One end of the second electric heating sleeve 71 is connected to the two-way ball valve 13 via a ferrule joint 14. The other end of the second electric heating sleeve 71 is connected to the inlet of the cooling assembly 8. A filter cartridge groove 711 is provided on the inner wall of the second electric heating sleeve 71.

[0060] The filter cartridge 72 is made of glass fiber, is placed in the second electric heating sleeve 71 , and is embedded in the filter cartridge groove 711 .

[0061] When high-humidity flue gas passes through the filter cartridge, the second electric heating sleeve can further heat the flue gas, preventing it from condensing into water on the filter cartridge and soaking through it, which could damage the permeable filter cartridge and affect the filtration effect. Therefore, heating the filter cartridge ensures its filtration performance, enabling it to filter pollutants in the flue gas and providing more accurate sampling results.

[0062] In a preferred embodiment, the cooling assembly 8 includes:

[0063] A metal radiator 81, the inlet of which is fixedly connected to the other end of the second electric heating sleeve 71;

[0064] A semiconductor cooler 82, wherein the inlet of the semiconductor cooler 82 is connected to the outlet of the metal radiator 81, the outlet of the semiconductor cooler 82 is connected to the inlet of the sampling pump 9, and the semiconductor cooler 82 is electrically connected to the sampling control unit 10;

[0065] The condensed water bottle 83 is located below the semiconductor refrigerator 82 , and the bottle mouth of the condensed water bottle 83 is connected to the condensed water outlet of the semiconductor refrigerator 82 .

[0066] The semiconductor refrigerator 82 and the condensed water bottle 83 may be connected in series in multiple groups to ensure the effect of separating gas and water in the flue gas.

[0067] The smoke sampler also includes a thermocouple temperature sensor 15, a pitot tube pressure sensor 16, and a flowmeter, all electrically connected to the sampling control unit 10. The stem 151 of the thermocouple temperature sensor 15 is inserted into the wall of the first electric heating sleeve 4, and the probe 152 of the thermocouple temperature sensor 15 extends into the flue. The pitot tube pressure sensor 16 is inserted into the wall of the first electric heating sleeve 4, and the probe on it extends into the flue. The flowmeter is installed on the sampling tube 6. The outer wall of the stem 151 is wrapped with a thermal insulation layer 17.

[0068] When installing the sampling tube, first close the gate valve to prevent smoke leakage in the flue. Then, insert the sampling tube into the nozzle of the first electric heating sleeve, and then plug the first electric heating sleeve into the nozzle of the second connecting pipe. Then open the gate valve and quickly push the first electric heating sleeve and the sampling tube into the flue. Seal the nozzle of the second connecting pipe with a rubber sealing plug to prevent smoke leakage. After the sampler is installed, a leak test should be performed first. On-site sampling personnel must be equipped with a portable carbon monoxide alarm. The carbon monoxide concentration in the work site environment should be less than 50ppm. If leaks are found at the interface, apply vaseline to improve the sealing of the interface.

[0069] Then the sampling control unit controls the operation of the first electric heating sleeve, the second electric heating sleeve and the sampling pump. The flue gas in the flue enters the sampling tube under the suction action of the sampling pump. The sampling tube is heated to above 100°C under the heating of the first electric heating sleeve, so that the moisture in the flue gas flows in the sampling tube together with the flue gas in the form of water vapor, avoiding the accumulation of moisture in the sampling tube and affecting the fluidity of the flue gas in the sampling tube; the flue gas enters the filter cartridge through the sampling tube, and the filter cartridge intercepts the dust in the flue gas. At this time, the second electric heating sleeve can further heat the flue gas in the filter cartridge, effectively preventing the flue gas with a high moisture content from condensing into water at the filter cartridge and soaking the filter cartridge, and the soaked filter cartridge is sucked out by the sampling pump. The filter cartridge's ability to break under suction reduces its ability to retain dust in the flue gas, leading to significant pollutant loss during the sampling process, significantly deviating from the actual sampling results, and poor sampling accuracy. The flue gas then enters a metal radiator for primary cooling to below 70°C. It then undergoes secondary cooling in a semiconductor cooler, rapidly condensing the water vapor in the flue gas into water, which is then collected in a condensate bottle. This prevents condensed water from entering the sampling pump and damaging it. The water-free gas then enters the sampling pump, whose exhaust is directed to the wind direction using a rubber hose and collected in a gas collection bag away from the sampling platform to prevent the risk of carbon monoxide inhalation by the sampler. After sampling, the first electric heating sleeve is pulled out of the gate valve and then closed. This effectively prevents flue gas leakage after the sampler is removed. The two-way ball valve is then closed, and the filter cartridge is removed and weighed. The change in filter mass before and after sampling is used to assess the dust in the flue.

[0070] Therefore, the sampler uses a gate valve and a rubber sealing plug to seal the pipeline, which can prevent the leakage of carbon monoxide in the flue gas, thereby ensuring the safety of the sampling personnel; and a second electric heating sleeve is used to heat the filter cartridge to prevent the flue gas with a high moisture content from wetting the filter cartridge and causing damage (because the sampling pump has a suction force, a wet filter cartridge is easily broken), thereby reducing the dust retention effect of the filter cartridge, so it can be ensured that the filter cartridge will not be wet and damaged, thereby ensuring that the filter cartridge can normally retain the dust in the flue gas, so that the smoke sampling results are accurate; in addition, the sampling pump and the sampling control unit are separated, that is, the two are not integrated in a main chassis, which will not cause high concentrations of carbon monoxide to accumulate in the main chassis, and the risk of explosion when the sampling pump ignites greatly improves the safety of use, and also facilitates good ventilation and heat dissipation during the operation of the sampling pump, further preventing explosions.

[0071] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0072] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A smoke sampler, characterized in that: include: A first connecting pipe (1), one end of which is fixedly connected to a sampling hole on a flue wall (100); A gate valve (2), wherein a pipe opening on one side of the gate valve (2) is detachably connected to the other end of the first connecting pipe (1); A second connecting pipe (3), one end of which is detachably connected to the pipe opening on the other side of the gate valve (2); a first electric heating sleeve (4), one end of the first electric heating sleeve (4) passing through the second connecting pipe (3), the gate valve (2), the first connecting pipe (1), the flue wall (100) and extending into the flue, a rubber sealing plug (5) being fixed to the other end of the first electric heating sleeve (4), the rubber sealing plug (5) being sealedly connected to the other end of the second connecting pipe (3), and a through hole being provided on the rubber sealing plug (5); A sampling tube (6), wherein one end of the sampling tube (6) is provided with a sampling nozzle (61), which passes through the through hole and the nozzle of the first electric heating sleeve (4) and extends into the flue, and the other end of the sampling tube (6) extends outward from the through hole; A smoke sampling filter cartridge (7), wherein the inlet end of the smoke sampling filter cartridge (7) is connected to the other end of the sampling tube (6); A cooling assembly (8), wherein the inlet of the cooling assembly (8) is connected to the outlet end of the smoke sampling filter cartridge (7); a sampling pump (9), wherein the inlet of the sampling pump (9) is connected to the outlet of the cooling assembly (8); A sampling control unit (10), the sampling control unit (10) being electrically connected to the first electric heating sleeve (4) and the sampling pump (9); The pipe opening on one side of the gate valve (2) is detachably connected to the other end of the first connecting pipe (1) via a first connecting flange (11); one end of the second connecting pipe (3) is detachably connected to the pipe opening on the other side of the gate valve (2) via a second connecting flange (12); The rubber sealing plug (5) is connected to the other end of the second connecting pipe (3) in a conical sealing manner.

2. A smoke sampler according to claim 1, characterized in that: A two-way ball valve (13) is provided at the other end of the sampling tube (6), and a sleeve-type joint (14) is provided between the two-way ball valve (13) and the smoke sampling filter cartridge (7).

3. A smoke sampler according to claim 2, characterized in that: The smoke sampling filter cartridge (7) comprises: a second electric heating sleeve (71), the second electric heating sleeve (71) being electrically connected to the sampling control unit (10), one end of the second electric heating sleeve (71) being connected to the two-way ball valve (13) via the ferrule joint (14), the other end of the second electric heating sleeve (71) being connected to the inlet of the cooling assembly (8), and a filter cartridge groove (711) being provided on the inner wall of the second electric heating sleeve (71); A filter cartridge (72), the filter cartridge (72) is placed in the second electric heating sleeve (71) and embedded in the filter cartridge groove (711).

4. A smoke sampler according to claim 3, characterized in that: The cooling assembly (8) comprises: a metal radiator (81), wherein the inlet of the metal radiator (81) is fixedly connected to the other end of the second electric heating sleeve (71); a semiconductor cooler (82), wherein the inlet of the semiconductor cooler (82) is connected to the outlet of the metal radiator (81), the outlet of the semiconductor cooler (82) is connected to the inlet of the sampling pump (9), and the semiconductor cooler (82) is electrically connected to the sampling control unit (10); A condensed water bottle (83), wherein the bottle mouth of the condensed water bottle (83) is connected to the condensed water outlet of the semiconductor refrigerator (82).

5. A smoke sampler according to any one of claims 1 to 4, characterized in that: It also includes a thermocouple temperature sensor (15), a Pitot tube pressure sensor (16) and a flow meter, all of which are electrically connected to the sampling control unit (10); the tube rod (151) of the thermocouple temperature sensor (15) is inserted into the tube wall of the first electric heating sleeve (4), and the probe (152) of the thermocouple temperature sensor (15) extends into the flue; the Pitot tube pressure sensor (16) is inserted into the tube wall of the first electric heating sleeve (4), and the probe on it extends into the flue; the flow meter is arranged on the sampling tube (6).

6. A smoke sampler according to claim 5, characterized in that: The outer wall of the pipe rod (151) is wrapped with a heat insulation layer (17).

7. A smoke sampler according to any one of claims 1-4 and 6, characterized in that: The sampling pump (9) is an explosion-proof pump.

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