CN220188152U - High-temperature low-concentration smoke sampling device - Google Patents

Abstract

The utility model provides a high-temperature low-concentration smoke sampling device, which comprises: the smoke sampling tube is provided with a sampling end and an air extraction end which are oppositely arranged, and the air cooling device comprises a cooling box and a spiral tube; the cooling box is provided with an extraction opening and an air outlet, the extraction end of the smoke sampling tube is connected with the extraction opening, and the air outlet is used for connecting gas collection equipment; the spiral pipe is arranged in the cooling box, and two ends of the spiral pipe are respectively connected with the air extraction opening and the air outlet; the cooling box is also provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are used for circularly introducing cooling liquid into the cooling box. According to the smoke dust sampling device disclosed by the utility model, when high-temperature gas in smoke dust passes through the spiral pipe, the heat exchange can be performed by the circulating cooling liquid in the cooling box, so that the temperature of the gas entering the gas collecting equipment is greatly reduced, the smoke dust is ensured to be normally sampled under a high-temperature environment, meanwhile, the gas collecting equipment is not damaged by the high-temperature gas, and the normal operation of the equipment is ensured.

Description

High-temperature low-concentration smoke sampling device

Technical Field

The utility model relates to the technical field of smoke sampling, in particular to a high-temperature low-concentration smoke sampling device.

Background

Smoke is typically a solid particulate matter discharged from coal burning and industrial processes. It contains main components such as silicon dioxide, aluminum oxide, ferric oxide, calcium oxide, unburned carbon particles, etc. With the improvement and promotion of the industrialized dust removal technology, the concentration of smoke dust generated in industrial production is lower and lower, so that ultra-clean emission is realized.

According to the requirements of the national standards of smoke sampling (GB/T16157-1996 method for measuring particulate matters in fixed polluted exhaust and sampling gaseous pollutants), in order to obtain a representative smoke sample from a pipeline, the current general sampling mode is to extend a low-concentration smoke sampling pipe into a flue to be tested, wrap a layer of filter membrane on a sampling elbow, then exhaust air from the sampling elbow, and leave the smoke dust on the surface of the filter membrane after filtering, so that the weight of the smoke dust collected in a unit sampling volume can be obtained by integrally drying and weighing the sampling elbow. As disclosed in the patent with publication No. CN203908814U, a smoke gun suitable for sampling low-concentration smoke is disclosed, in which an air tap is arranged on a smoke gun handle to pump air from a sampling tube, while a filter cartridge assembly at the front end of the sampling tube can collect the weight of smoke particles, in the process of sampling smoke, the gas in the smoke still needs to be detected, and the gas in the part is pumped into a gas collecting device at the rear end by the air tap, so that the smoke gun for sampling smoke usually needs to be matched with the gas collecting device. However, at present, the temperature of smoke dust in an industrial flue is higher and higher, and is somewhat approaching to more than 1000 ℃, and high-temperature gas in the smoke dust is directly pumped to gas collection equipment at the rear end, so that the high-temperature gas can influence the collection equipment, the collection equipment is caused to malfunction, and normal operation is not possible.

Disclosure of Invention

In view of the above, the utility model provides a high-temperature low-concentration smoke sampling device, which is used for solving the problem that high-temperature gas in smoke can damage gas collection equipment connected with the rear end of the smoke sampling device and affect the normal operation of the smoke sampling device in the high-temperature smoke sampling process.

The technical scheme of the utility model is realized as follows:

the utility model provides a high-temperature low-concentration smoke sampling device, which comprises:

the smoke sampling tube is provided with a sampling end and an air extraction end which are arranged oppositely,

the gas cooling device comprises a cooling box and a spiral pipe; wherein,

the cooling box is provided with an extraction opening and an air outlet, the extraction end of the smoke sampling tube is connected with the extraction opening, and the air outlet is used for connecting gas collection equipment;

the spiral pipe is arranged in the cooling box, and two ends of the spiral pipe are respectively connected with the air extraction opening and the air outlet;

the cooling box is also provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are used for circularly introducing cooling liquid into the cooling box.

On the basis of the technical scheme, preferably, the air extraction opening and the air outlet are respectively positioned at two opposite sides of the cooling box, the liquid inlet is positioned at one end surface of the cooling box, which is close to the air outlet, and the liquid outlet is positioned at one end surface of the cooling box, which is close to the air extraction opening.

Further, preferably, the smoke sampling tube comprises an outer tube, an inner tube, a sampling head device and a connecting device, the inner tube is arranged in the outer tube, the sampling end and the air extraction end are respectively located at two ends of the outer tube in the axial direction, one end of the inner tube extends out of the air extraction end of the outer tube and is connected with the air extraction opening, and one end of the inner tube extends out of the sampling end of the outer tube and is detachably connected with the sampling head device through the connecting device.

On the basis of the technical scheme, preferably, the sampling head device comprises a suction pipe and an adsorption component connected with the suction pipe, wherein the adsorption component comprises a positioning disc, a filter membrane, a supporting net and a binding piece; wherein, the one end of suction tube passes the positioning disk central axis and with positioning disk fixed connection, the filter membrane is attached to one side that the suction tube was kept away from at the positioning disk, holds in the palm the net and is attached to one side that the filter membrane was kept away from the positioning disk, and the piece of borduring is annular setting, and it sets up and keeps away from one side of filter membrane and with positioning disk fixed connection at holding in the palm the net.

On the basis of the technical scheme, preferably, the connecting device comprises a gland and a connecting seat which are of cylindrical structures, wherein the connecting seat is fixedly connected and communicated with one end of the inner tube, which is far away from the extraction opening, an external thread is arranged on the outer peripheral wall of the connecting seat, an internal thread is arranged on the inner peripheral wall of the gland, and the gland penetrates through the suction tube and is in threaded connection with the connecting seat so that the adsorption component is fixed between the gland and the connecting seat.

Further, preferably, the connecting device further comprises a pressure ring, and the pressure ring is sleeved on the suction pipe and is located between the pressure cover and the adsorption component.

On the basis of the technical scheme, preferably, a mounting structure is further arranged between the cooling box and the smoke sampling pipe, the mounting structure comprises a fixed disc and a connecting rod, one end of the outer pipe, which is far away from the sampling head device, penetrates through the central axis of the fixed disc and is fixedly connected with the fixed disc, the connecting rod is provided with a plurality of connecting rods, the plurality of connecting rods are arranged at equal intervals around the central axis of the cooling box, one end of the connecting rod is fixedly connected with one end of the cooling box, which is located at the extraction opening, and the other end of the connecting rod is detachably connected with the fixed disc.

On the basis of the technical scheme, preferably, the smoke sampling tube further comprises a leather tug tube, the leather tug tube is arranged in the outer tube, one end of the leather tug tube extends to the sampling head device, and the other end of the leather tug tube is led out from the air extraction end of the outer tube and is connected with the gas collecting equipment.

Compared with the prior art, the utility model has the following beneficial effects:

(1) According to the high-temperature low-concentration smoke sampling device disclosed by the utility model, the smoke sampling pipe and the gas cooling device are arranged, the air extraction end of the smoke sampling pipe is connected with the air extraction opening on the cooling box, the air outlet is connected with the gas collecting device, the smoke sampling pipe is in the flue, the smoke sampling pipe is extracted through the spiral pipe by the gas collecting device, the sampling end of the smoke sampling pipe can sample smoke, and high-temperature gas in the smoke can be subjected to heat exchange by circulating cooling liquid in the cooling box when passing through the spiral pipe, so that the temperature of the gas entering the gas collecting device is greatly reduced, the normal sampling operation of the smoke in a high-temperature environment is ensured, meanwhile, the gas collecting device is not damaged by the high-temperature gas, and the normal operation of the device is ensured;

(2) The connecting device is arranged between the inner pipe and the sampling head device, so that the sampling head device and the inner pipe can be detachably connected, the whole sampling head device is conveniently taken down from the smoke dust sampling pipe after the sampling head device collects smoke dust particles, and the weight of the particles is conveniently obtained;

(3) The support net and the filter membrane are wrapped on the positioning disc through the edge wrapping piece, so that the whole sampling head device formed by the adsorption component and the suction tube is convenient to weigh, and the smoke dust particles adsorbed onto the filter membrane can be sealed.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a three-dimensional structure of a high-temperature low-concentration smoke sampling device disclosed by the utility model;

FIG. 2 is a schematic plan view of a high temperature low concentration smoke sampling device according to the present utility model;

FIG. 3 is a schematic plan view of a gas cooling apparatus according to the present disclosure;

FIG. 4 is an exploded schematic view of the disclosed high temperature low concentration soot sampling device;

FIG. 5 is an enlarged view of a portion of FIG. 4 at A;

FIG. 6 is a schematic perspective view of a sample head device according to the present disclosure;

FIG. 7 is an exploded view of the disclosed adsorption module;

reference numerals:

1. a smoke sampling tube; 2. a gas cooling device; 21. a cooling box; 22. a spiral tube; 211. an extraction opening; 212. an air outlet; 213. a liquid inlet; 214. a liquid outlet; 11. an outer tube; 12. an inner tube; 13. a sampling head device; 14. a connecting device; 131. a suction tube; 132. an adsorption assembly; 1321. a positioning plate; 1322. a filter membrane; 1323. a supporting net; 1324. a hemming member; 141. a gland; 142. a connecting seat; 143. a compression ring; 16. a fixed plate; 215. a connecting rod; 15. a leather tug tube.

Detailed Description

The following description of the embodiments of the present utility model will clearly and fully describe the technical aspects of the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.

As shown in fig. 1, in combination with fig. 2 to 3, an embodiment of the present utility model discloses a high-temperature low-concentration smoke sampling device, which comprises a smoke sampling tube 1 and a gas cooling device 2.

Wherein, smoke and dust sampling pipe 1 for take a sample to the smoke and dust particulate matter in the environment, smoke and dust sampling pipe 1 has the sampling end and the end of bleeding of relative setting, and wherein, the end of bleeding is used for exerting suction, and the sampling end is used for stretching into the environment and carries out the sample of smoke and dust particulate matter, for example the flue, under the effect of smoke and dust sampling pipe 1 suction, the smoke and dust particulate matter is adsorbed by the sampling end.

Typically, soot particulate sampling is primarily analyzing the weight of soot collected per unit of sampling volume, and during the pollutant emission measurement process, it is also often necessary to sample the gaseous pollutants in the soot for alignment analysis.

In the prior art, the gas collection device is generally connected to the suction end of the smoke sampling tube 1, suction force is applied through the gas collection device, so that pollutant gas in smoke is sucked into the gas collection device through the smoke sampling tube 1, however, as the smoke temperature in an industrial flue is higher and higher, high-temperature gas in smoke is directly sucked into the gas collection device at the rear end, high-temperature gas can cause influence on the collection device, the collection device is caused to fail, and normal operation cannot be performed.

For this reason, the present embodiment provides the gas cooling device 2 at the gas extraction end of the smoke sampling tube 1 to solve the above-mentioned technical problems.

Specifically, the gas cooling device 2 comprises a cooling box 21 and a spiral pipe 22, wherein an extraction opening 211 and an air outlet 212 are formed in the cooling box 21, the extraction end of the smoke sampling pipe 1 is connected with the extraction opening 211, and the air outlet 212 is used for being connected with gas collecting equipment.

The spiral tube 22 is arranged in the cooling box 21, and two ends of the spiral tube 22 are respectively connected with the air extraction opening 211 and the air outlet 212.

The cooling tank 21 is further provided with a liquid inlet 213 and a liquid outlet 214, and the liquid inlet 213 and the liquid outlet 214 are used for circulating and introducing cooling liquid into the cooling tank 21, preferably water, and naturally, cooling oil with high heat dissipation can be selected.

By adopting the technical scheme, the smoke sampling tube 1 is placed in the flue, the smoke sampling tube 1 is pumped through the spiral tube 22 by the gas collecting equipment, the sampling end of the smoke sampling tube 1 can sample smoke, and high-temperature gas in the smoke can be subjected to heat exchange by circulating cooling liquid in the cooling box 21 when passing through the spiral tube 22, so that the gas temperature in the gas collecting equipment is greatly reduced, the smoke is ensured to be normally sampled under the high-temperature environment, and meanwhile, the gas collecting equipment is not damaged by the high-temperature gas, and the normal operation of the equipment is ensured.

As some preferred embodiments, the air extraction opening 211 and the air outlet 212 are respectively located at two opposite sides of the cooling box 21, so that the space of the spiral tube 22 in the cooling box 21 can be fully utilized, the path length of the high-temperature gas flowing in the spiral tube 22 is increased, and the high-temperature gas can be rapidly cooled under the circulating cooling effect of the cooling liquid. In a preferred embodiment, the liquid inlet 213 is located at an end surface of the cooling tank 21 near the air outlet 212, and the liquid outlet 214 is located at an end surface of the cooling tank 21 near the air extraction opening 211. Therefore, the low-temperature water cools the gas with lower temperature at the tail end in the spiral tube 22, and then cools the gas with higher temperature at the head end of the spiral tube 22, so that the heat exchange temperature difference is kept uniform.

The present embodiment shows a preferred embodiment of the smoke sampling tube 1, and in particular, referring to fig. 4 and 5, the smoke sampling tube 1 comprises an outer tube 11, an inner tube 12, a sampling head means 13 and a connection means 14.

The inner tube 12 is arranged in the outer tube 11, and through the arrangement of the outer tube 11, the inner tube 12 can be fixedly protected, and meanwhile, the outer tube 11 and the gas cooling device 2 are also conveniently and fixedly assembled. Both the inner tube 12 and the outer appearance in this embodiment are made of high temperature resistant metal.

The sampling end and the air extraction end are respectively positioned at two ends of the outer tube 11 in the axial direction, one end of the inner tube 12 extends out of the air extraction end of the outer tube 11 and is connected with the air extraction opening 211, and one end of the inner tube 12 extends out of the sampling end of the outer tube 11 and is detachably connected with the sampling head device 13 through the connecting device 14. Therefore, after the sampling head device 13 collects dust particles in the flue, the sampling head device 13 is disconnected from the inner tube 12 through the connecting device 14, so that the whole sampling head device 13 is conveniently taken down from the dust sampling tube 1, and the weight of the particles is conveniently obtained.

In order to implement the sampling head device 13 to sample soot particles, a preferred embodiment of the sampling head device 13 is shown in this embodiment, and in particular, referring to fig. 6 and 7, the sampling head device 13 includes a suction tube 131 and an adsorption assembly 132 connected to the suction tube 131.

The suction pipe 131 is a high-temperature-resistant metal pipe, and one end of the suction pipe 131 is bent to form a certain angle, so that smoke dust particles on the inner wall of the flue can be conveniently sucked.

The adsorption assembly 132 includes a positioning disk 1321, a filter 1322, a support web 1323, and a border piece 1324.

One end of the suction tube 131 passes through the central axis of the positioning disc 1321 and is fixedly connected with the positioning disc 1321, the filter membrane 1322 is attached to one side of the positioning disc 1321 far away from the suction tube 131, and the filter membrane 1322 in the embodiment is quartz, so that on one hand, the high-temperature resistance is achieved, and on the other hand, dust particles can be effectively adsorbed.

The support net 1323 is attached to one side of the filter membrane 1322 away from the positioning disk 1321, so as to protect the filter membrane 1322, so that the filter membrane 1322 is limited between the positioning disk 1321 and the support net 1323, and the filter membrane 1322 can effectively adsorb particulate matters, and high-temperature gas can flow to the inner pipe 12 through meshes in the support net 1323 after passing through the filter membrane 1322.

The edge covering piece 1324 is annular, is a high-temperature metal foil, and is arranged on one side of the supporting net 1323 away from the filter membrane 1322 and fixedly connected with the positioning disk 1321. The supporting net 1323 and the filter membrane 1322 can be rapidly wrapped on the positioning disk 1321 through the edge covering piece 1324, so that the whole sampling head device 13 formed by the adsorption component 132 and the suction pipe 131 is conveniently weighed, and the smoke dust particles adsorbed onto the filter membrane 1322 can be sealed.

In addition, through the setting of piece 1324 of borduring, can be after accomplishing a smoke and dust particulate matter sample, take off piece 1324 of borduring from positioning disk 1321, change new filter membrane 1322 and piece 1324 of borduring, can constitute new adsorption component 132, conveniently carry out the smoke and dust sample work next.

Before the sampling of the smoke particulate matters is completed, the sampling head device 13 is integrally weighed, after the sampling of the smoke particulate matters is completed, the sampling head device 13 is taken down from the smoke sampling pipe 1 and is integrally weighed, the weight of the smoke particulate matters adsorbed on the filter membrane 1322 can be obtained by calculating a difference value, and the concentration of the smoke particulate matters can be calculated according to the extraction amount.

In order to establish the detachable and washable connection between the sampling head device 13 and the inner tube 12, the present embodiment shows a preferred embodiment of the connection device 14, specifically, the connection device 14 includes a gland 141 and a connection seat 142 having a cylindrical structure, the connection seat 142 is fixedly connected and communicated with one end of the inner tube 12 far away from the air extraction opening 211, an external thread is provided on an outer peripheral wall of the connection seat 142, an internal thread is provided on an inner peripheral wall of the gland 141, and the gland 141 passes through the suction tube 131 and is in threaded connection with the connection seat 142, so that the adsorption component 132 is fixed between the gland 141 and the connection seat 142.

By adopting the technical scheme, when the sampling head device 13 and the inner tube 12 are required to be connected, firstly, one side, far away from the suction tube 131, of the adsorption component 132 is contacted with the connecting seat 142 at the end part of the inner tube 12, and then the gland 141 penetrates through the suction tube 131 and is in threaded connection with the connecting seat 142, so that the adsorption component 132 is fixed between the gland 141 and the connecting seat 142, and quick connection between the inner tube 12 and the sampling head device 13 is established. When the cover 141 and the connecting seat 142 are detached, they are just detached.

In order to enable the adsorption assembly 132 to effectively seal between the gland 141 and the connection seat 142 when the gland 141 is screwed with the connection seat 142, the connection device 14 is further provided with a compression ring 143, and the compression ring 143 is sleeved on the suction tube 131 and is located between the gland 141 and the adsorption assembly 132. Therefore, in the process of rotating and screwing the gland 141 and the connecting seat 142, the gland 141 axially presses the compression ring 143, so that the compression ring 143 presses the adsorption component 132 to be in close contact with the end part of the connecting seat 142, and the tightness and reliability after connection are improved.

For facilitating detachable connection of the smoke sampling tube 1 and the gas cooling device 2, the embodiment is further provided with a mounting structure between the cooling box 21 and the smoke sampling tube 1, the mounting structure comprises a fixed disk 16 and a connecting rod 215, one end of the outer tube 11, which is far away from the sampling head device 13, penetrates through the central axis of the fixed disk 16 and is fixedly connected with the fixed disk 16, the connecting rod 215 is provided with a plurality of connecting rods 215, the connecting rods 215 are arranged at equal intervals around the central axis of the cooling box 21, one end of the connecting rod 215 is fixedly connected with one end of the cooling box 21, which is located at the extraction opening 211, and the other end of the connecting rod 215 is detachably connected with the fixed disk 16.

By adopting the technical scheme, when the smoke sampling tube 1 needs to be connected with the cooling box 21, only one end of the connecting rod 215 far away from the cooling box 21 is required to pass through the fixed disc 16 at the end part of the outer tube 11, and the connecting rod 215 is connected with two sides of the fixed disc 16 by bolts, so that the whole structure is convenient to install and detach.

The smoke sampling tube 1 in this embodiment further comprises a tug tube 15, the tug tube 15 is arranged in the outer tube 11, one end of the tug tube 15 extends to the sampling head device 13, and the other end is led out from the air extraction end of the outer tube 11 for connection with a gas collecting device. Through the setting of pitot tube, can gather the velocity of flow and the flow data of flue gas.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (8)

1. A high temperature low concentration smoke sampling device, comprising:

the smoke sampling tube (1) is provided with a sampling end and an air extraction end which are arranged oppositely,

a gas cooling device (2) comprising a cooling box (21) and a spiral tube (22); wherein,

an extraction opening (211) and an air outlet (212) are arranged on the cooling box (21), the extraction end of the smoke sampling tube (1) is connected with the extraction opening (211), and the air outlet (212) is used for connecting gas collection equipment;

the spiral tube (22) is arranged in the cooling box (21), and two ends of the spiral tube (22) are respectively connected with the air extraction opening (211) and the air outlet (212);

the cooling box (21) is also provided with a liquid inlet (213) and a liquid outlet (214), and the liquid inlet (213) and the liquid outlet (214) are used for circularly introducing cooling liquid into the cooling box (21).

2. The high temperature low concentration soot sampling device according to claim 1, wherein: the air extraction opening (211) and the air outlet (212) are respectively positioned at two opposite sides of the cooling box (21), the liquid inlet (213) is positioned at one end surface of the cooling box (21) close to the air outlet (212), and the liquid outlet (214) is positioned at one end surface of the cooling box (21) close to the air extraction opening (211).

3. The high temperature low concentration soot sampling device according to claim 1, wherein: the smoke sampling tube (1) comprises an outer tube (11), an inner tube (12), a sampling head device (13) and a connecting device (14), wherein the inner tube (12) is arranged in the outer tube (11), the sampling end and the air extraction end are respectively positioned at two ends of the outer tube (11) in the axial direction, one end of the inner tube (12) extends out of the suction end of the outer tube (11) and is connected with an air extraction opening (211), and one end of the inner tube (12) extends out of the sampling end of the outer tube (11) and is detachably connected with the sampling head device (13) through the connecting device (14).

4. A high temperature low concentration smoke sampling apparatus according to claim 3, wherein: the sampling head device (13) comprises a suction pipe (131) and an adsorption component (132) connected with the suction pipe (131), wherein the adsorption component (132) comprises a positioning disc (1321), a filter membrane (1322), a supporting net (1323) and a binding piece (1324); wherein the method comprises the steps of

One end of the suction pipe (131) passes through the central axis of the positioning disk (1321) and is fixedly connected with the positioning disk (1321);

the filter membrane (1322) is attached to one side of the positioning disk (1321) far away from the suction pipe (131);

the supporting net (1323) is attached to one surface of the filter membrane (1322) far away from the positioning disk (1321);

the edge covering piece (1324) is in an annular shape, is arranged on one side of the supporting net (1323) far away from the filter membrane (1322) and is fixedly connected with the positioning disk (1321).

5. The high temperature low concentration soot sampling device according to claim 4, wherein: the connecting device (14) comprises a gland (141) and a connecting seat (142), wherein the gland (141) and the connecting seat (142) are of a cylindrical structure, the connecting seat (142) is fixedly connected and communicated with one end, far away from the extraction opening (211), of the inner tube (12), external threads are arranged on the outer peripheral wall of the connecting seat (142), internal threads are arranged on the inner peripheral wall of the gland (141), and the gland (141) penetrates through the suction tube (131) and is in threaded connection with the connecting seat (142), so that the adsorption component (132) is fixed between the gland (141) and the connecting seat (142).

6. The high temperature low concentration soot sampling device according to claim 5, wherein: the connecting device (14) further comprises a pressing ring (143), and the pressing ring (143) is sleeved on the suction pipe (131) and is positioned between the pressing cover (141) and the adsorption assembly (132).

7. A high temperature low concentration smoke sampling apparatus according to claim 3, wherein: still be provided with mounting structure between cooling tank (21) and smoke and dust sampling pipe (1), mounting structure includes fixed disk (16) and connecting rod (215), the one end that sampling head device (13) was kept away from to outer tube (11) passes fixed disk (16) central axis and with fixed disk (16) fixed connection, connecting rod (215) are provided with many, many connecting rods (215) are equidistant around cooling tank (21) central axis setting, the one end of connecting rod (215) is located the one end vertical fixed connection of extraction opening (211) with cooling tank (21), and the other end is used for dismantling with fixed disk (16) and is connected.

8. A high temperature low concentration smoke sampling apparatus according to claim 3, wherein: the smoke sampling tube (1) further comprises a tugboat (15), the tugboat (15) is arranged in the outer tube (11), one end of the Pi Tuoguan (15) extends to the sampling head device (13), and the other end of the tugboat is led out from the air extraction end of the outer tube (11) and is used for being connected with gas collecting equipment.