1. The utility model provides a coal-fired flue gas arsenic sampling's device which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the sampling assembly (100) comprises a sampling gun (102), a shell (101) arranged at the rear end of the sampling gun (102) and a pressure regulating piece (103) connected with the sampling gun (102);

the filter assembly (200) comprises a flange plate (201) connected with the pressure regulating pump (103a), a glass cover (202) arranged in the flange plate (201), and a vent pipe (203) arranged on the glass cover (202), wherein an absorption bottle (204) connected with the flange plate (201) is arranged outside the shell (101); and the number of the first and second groups,

a heating assembly (300), the heating assembly (300) being disposed within the housing (101).

2. The coal-fired flue gas arsenic sampling device of claim 1, wherein: the heating assembly (300) comprises a heating plate (301) arranged in the shell (101), a heating pipeline (302) arranged on the heating plate (301) and a heating resistance wire arranged in the heating pipeline (302), a temperature receptor (303) is arranged in the shell (101), and a temperature-releasing piece (304) is arranged in the shell (101).

3. The coal-fired flue gas arsenic sampling device of claim 2, wherein: the temperature-relief piece (304) comprises a temperature-relief hole (305) arranged on the shell (101), an exhaust fan arranged in the temperature-relief hole (305) and a switch plate (306) connected to the temperature-relief hole (305) in a sliding way,

wherein, be provided with slide (307) on switch board (306), slide (307) front end is provided with bend (308), be provided with first slide (400) and second slide (401) on casing (101), first slide (400) set up and are keeping away from temperature-discharging hole (305) department, first slide (400) and second slide (401) are close to temperature-discharging hole (305) one end and all are provided with supplementary bend, be equipped with on switch board (306) with first slide (400) and second slide (401) complex fitting piece (403).

4. The coal-fired flue gas arsenic sampling device of claim 3, wherein: the fitting piece (403) comprises a first clamping plate (403a) arranged on the switch plate (306), a second clamping plate (403b) arranged on the switch plate (306) and sliding blocks (403c) arranged on the first clamping plate (403a) and the second clamping plate (403b), the first clamping plate (403a) corresponds to the first slide way (400), the second clamping plate (403b) is matched with the second slide way (401), and the sliding blocks (403c) are provided with rotating wheels,

a driving air cylinder is arranged in the shell (101), a sliding block is connected in the sliding way (307) in a sliding way, and the driving air cylinder is connected with the sliding block.

5. The coal-fired flue gas arsenic sampling device of claim 1, wherein: the pressure regulating part (103) comprises a pressure regulating pump (103a) and a pressure regulating pipe arranged on the pressure regulating pump (103a), the pressure regulating pipe is connected with the shell (101) and the sampling gun (102), two ends of the pressure regulating pipe are rotatably connected with connecting rings, clamping rods are arranged on the connecting rings, matching rings matched with the connecting rings are arranged on the sampling gun (102) and the shell (101), and clamping rod matching bayonets are arranged on the matching rings.

6. The coal-fired flue gas arsenic sampling device of claim 1, wherein: the pressure regulating part (103) comprises a communicating pipe (500) connected with the sampling gun (102), a blocking ball (501) connected in the connecting pipe in a sliding manner and a connecting rod (502) arranged at the rear end of the blocking ball (501), the blocking ball (501) is connected with the sampling gun (102), a first latch (503) is arranged on the connecting rod (502), a rotating rod (504) is connected in the communicating pipe (500) in a rotating manner, a second latch (505) matched with the first latch (503) is arranged at the front end of the rotating rod (504), a rotating wheel of the communicating pipe (500) is connected with a rotating roller (506), and a blocking block (507) is arranged on the rotating roller (506),

wherein, the tip of bull stick (504) is provided with runner (508), offer on hindering piece (507) with runner (508) complex arc surface (509), be equipped with torsional spring (509a) on the pivot of bull stick (504).

7. The coal-fired flue gas arsenic sampling device of claim 6, wherein: the sampling gun is characterized in that a fan blade (600) is connected to the inner rotation of the sampling gun (102), a rotating rod (601) extends outwards from the rotating rod (504), a driving rope (602) is arranged on the rotating rod (601), an auxiliary wheel (603) is arranged inside and outside the sampling gun (102), the driving rope (602) is connected with the fan blade (600) after bypassing the auxiliary wheel (603), a clamping block (604) is arranged on the driving rope (602), a matching block (605) is arranged outside the sampling gun (102), and an elastic part (606) is arranged between the matching block (605) and the clamping block (604).

8. The coal-fired flue gas arsenic sampling device of claim 1, wherein: an ice bath barrel (607) is arranged outside the absorption bottle (204), and a sodium hydroxide solution is stored in the absorption bottle (204).

9. The coal-fired flue gas arsenic sampling device of claim 8, wherein: a quartz limit filter membrane is arranged between the two glass covers (202).

Background

Although arsenic in coal is a trace element, coal still occupies the main position in the current energy structure of China, the coal occupies 50.5% of the world coal consumption in 2018, the coal yield in China in 2019 exceeds 37.455 hundred million tons, and the coal yield is close to half of the total coal yield in the world again; china is in the stage of new energy system establishment, which means that fire coal is still an important component of an energy structure in the stage of 2020-; although China takes a plurality of measures for deeply purifying coal-fired flue gas, the huge consumption of coal is also an important emission source of arsenic emission.

As (III) generated by burning coal can cause serious pollution to the atmosphere, water and soil, the lowest concentration of arsenic which has toxic action on crops is 3mg/L, and the toxicity on aquatic organisms is also great. Arsenic and arsenide generally enter the body through water, atmosphere, and food, causing harm.

The main method for removing As from flue gas is to oxidize highly toxic As (III) into easily removed As (V), so the research on the transfer characteristics of different valence As is an important way to control the discharge of arsenic.

Therefore, aiming at the characteristics and environmental protection requirements of the coal resources at the present stage of China, the control of the coal pollutants is carried out, and the method is a necessary means for realizing the coordination of the coal resources and the environment; the arsenic pollution control is realized by a reasonable sampling and detection method, and the sampling accuracy and the anti-interference performance directly influence the accuracy of detected data. Arsenic in coal-fired flue gas mainly has two existing forms of trivalent and pentavalent, and the main problem of the existing sampling mode is that arsenic in the two valence states cannot be effectively separated, and a step-by-step extraction method capable of respectively sampling the arsenic in the two valence states is too complicated.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.

The invention is provided in view of the problems of the existing coal-fired flue gas arsenic sampling device.

Therefore, the invention aims to provide a device for sampling arsenic in coal-fired flue gas.

In order to solve the technical problems, the invention provides the following technical scheme: a coal-fired flue gas arsenic sampling device comprises a sampling assembly, a sampling assembly and a sampling device, wherein the sampling assembly comprises a sampling gun, a shell arranged at the rear end of the sampling gun and a pressure regulating part connected with the sampling gun; the filter assembly comprises a flange plate connected with the pressure regulating pump, a glass cover arranged in the flange plate and a vent pipe arranged on the glass cover, and an absorption bottle connected with the flange plate is arranged outside the shell; and a heating assembly disposed within the housing.

As a preferable scheme of the coal-fired flue gas arsenic sampling device, the coal-fired flue gas arsenic sampling device comprises the following components: the heating assembly comprises a heating plate arranged in the shell, a heating pipeline arranged on the heating plate and a heating resistance wire arranged in the heating pipeline, a temperature sensor is arranged in the shell, and a temperature unloading piece is arranged in the shell.

As a preferable scheme of the coal-fired flue gas arsenic sampling device, the coal-fired flue gas arsenic sampling device comprises the following components: the temperature-discharging piece comprises a temperature-discharging hole formed in the shell, a draught fan arranged in the temperature-discharging hole and a switch board connected to the temperature-discharging hole in a sliding mode, wherein a slide way is arranged on the switch board, a bent way is arranged at the front end of the slide way, a first slide way and a second slide way are arranged on the shell, the first slide way is arranged far away from the temperature-discharging hole, auxiliary bend ways are arranged at the ends, close to the temperature-discharging hole, of the first slide way and the second slide way, and a matching piece matched with the first slide way and the second slide way is arranged on the switch board.

As a preferable scheme of the coal-fired flue gas arsenic sampling device, the coal-fired flue gas arsenic sampling device comprises the following components: the mating piece comprises a first clamping plate arranged on the switch plate, a second clamping plate arranged on the switch plate and sliding blocks arranged on the first clamping plate and the second clamping plate respectively, the first clamping plate corresponds to the first slideway, the second clamping plate is matched with the second slideway, the sliding blocks are provided with rotating wheels,

the shell is internally provided with a driving cylinder, the sliding inner sliding is connected with a sliding block, and the driving cylinder is connected with the sliding block.

As a preferable scheme of the coal-fired flue gas arsenic sampling device, the coal-fired flue gas arsenic sampling device comprises the following components: the pressure regulating part includes pressure regulating pump and sets up the pressure regulating pipe on pressure regulating pump, pressure regulating pipe links to each other with casing and sample rifle, pressure regulating pipe both ends are rotated and are connected with the go-between, be provided with the kelly on the go-between, be provided with on sample rifle and the casing with go-between complex cooperation ring, be provided with on the cooperation ring with kelly cooperation bayonet socket.

As a preferable scheme of the coal-fired flue gas arsenic sampling device, the coal-fired flue gas arsenic sampling device comprises the following components: the pressure regulating part comprises a communicating pipe connected with the sampling gun, a blocking ball connected in the connecting pipe in a sliding way and a connecting rod arranged at the rear end of the blocking ball, the blocking ball is connected with the sampling gun, a first latch is arranged on the connecting rod, a rotating rod is connected in the communicating pipe in a rotating way, a second latch matched with the first latch is arranged at the front end of the rotating rod, a rotating wheel of the communicating pipe is connected with a rotating roller, and a blocking block is arranged on the rotating roller,

the end part of the rotating rod is provided with a rotating wheel, the blocking block is provided with an arc surface matched with the rotating wheel, and a rotating shaft of the rotating rod is provided with a torsion spring.

As a preferable scheme of the coal-fired flue gas arsenic sampling device, the coal-fired flue gas arsenic sampling device comprises the following components: the sampling gun is characterized in that a fan blade is connected to the inner rotation of the sampling gun, a rotating rod extends outwards from the rotating rod, a driving rope is arranged on the rotating rod, auxiliary wheels are arranged inside and outside the sampling gun, the driving rope is connected with the fan blade after bypassing the auxiliary wheels, a clamping block is arranged on the driving rope, a matching block is arranged outside the sampling gun, and an elastic part is arranged between the matching block and the clamping block.

As a preferable scheme of the coal-fired flue gas arsenic sampling device, the coal-fired flue gas arsenic sampling device comprises the following components: an ice bath barrel is arranged outside the absorption bottle, and a sodium hydroxide solution is stored in the absorption bottle.

As a preferable scheme of the coal-fired flue gas arsenic sampling device, the coal-fired flue gas arsenic sampling device comprises the following components: and a quartz limit filter membrane is arranged between the two glass covers.

The invention has the beneficial effects that: the coal-fired flue gas arsenic sampling device provided by the invention can be applied to flue gas arsenic sampling tests of coal-fired power plants and laboratories, is simple in structure and easy to disassemble and assemble, and can also collect compounds of gaseous arsenic and solid arsenic so as to be convenient for accurately measuring the arsenic content in flue gas, thereby having an important effect on the implementation of pollutant control experiments.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

FIG. 1 is a schematic view of the overall structure of the coal-fired flue gas arsenic sampling device of the invention.

FIG. 2 is a schematic structural diagram of a filtering component of the coal-fired flue gas arsenic sampling device.

FIG. 3 is a schematic structural view of a temperature relief piece of the device for sampling arsenic in coal-fired flue gas.

Fig. 4 is a schematic structural view of a pressure regulating member of embodiment 4 of the device for sampling arsenic from coal-fired flue gas of the present invention.

FIG. 5 is a schematic view of the rest of the structure of the pressure regulating part of the coal-fired flue gas arsenic sampling device.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Furthermore, the present invention is described in detail with reference to the drawings, and in the detailed description of the embodiments of the present invention, the cross-sectional view illustrating the structure of the device is not enlarged partially according to the general scale for convenience of illustration, and the drawings are only exemplary and should not be construed as limiting the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.

Example 1

Referring to fig. 1, the device for sampling arsenic in coal-fired flue gas comprises a sampling assembly 100, a sampling gun 102, a shell 101 arranged at the rear end of the sampling gun 102, and a pressure regulating part 103 connected with the sampling gun 102; the filter assembly 200 comprises a flange 201 connected with the pressure regulating member 103, a glass cover 202 arranged in the flange 201 and a vent pipe 203 arranged on the glass cover 202, and an absorption bottle 204 connected with the flange 201 is arranged outside the shell 101; and the heating assembly 300 is arranged in the shell 101, the ice bath barrel 607 is arranged outside the absorption bottle 204, the sodium hydroxide solution is stored in the absorption bottle 204, and a quartz limit filter membrane is arranged between the two glass covers 202.

Specifically, the main structure of the present invention includes a sampling assembly 100, in this embodiment, the sampling assembly 100 includes a sampling gun 102, the sampling gun 102 is in a long tubular configuration, the sampling gun 102 further includes a pipeline for introducing nitrogen, the above conditions can prevent gaseous arsenic from condensing into granular arsenic, the front end of the sampling gun 102 can be connected to a flow rate meter and a temperature measuring device, the flow rate and temperature of flue gas in the sampling gun 102 are measured, the rear end of the sampling gun 102 is further connected to a housing 101, the housing 101 is a main sampling processing part, then a pressure regulating part 103 is disposed between the sampling gun 102 and the housing 101, as flue gas needs to enter the filtering assembly 200, a pressure regulating key is used to increase the flow rate of flue gas entering the filtering assembly 200, and the flow rate is kept consistent.

The sampling gun is connected with a dust removal device such as WESP or ESP in a power plant, and a temperature detector and a flow velocity detector are arranged at the inlet of the sampling gun 102, so that the temperature and the flow of the flue gas can be obtained.

Further, in this embodiment, the filter assembly 200 includes two flanges 201, two glass covers 202 with air pipes 203 and a quartz fiber filter membrane, and is connected to the pump, so as to realize the separation of the particulate state and the gaseous state of the flue gas components, the heating assembly 300 is further disposed in the casing 101, the absorption bottle 204 connected to the flanges 201 is disposed outside the casing 101, the ice bath barrel 607 is disposed outside the absorption bottle 204, the sodium hydroxide solution is stored in the absorption bottle 204, and the quartz limit filter membrane is disposed between the two glass covers 202.

It is worth to be noted that, the aperture of the used quartz fiber filter membrane is 1 μm, the temperature of the flue gas is maintained between 220 ℃ and 240 ℃, so that gaseous arsenic in the flue gas is not coagulated in a particulate state, then the ice bath barrel 607 is used for performing ice bath treatment on the collected liquid, and the temperature in the collecting bottle is maintained at 20-50 ℃ in the collecting process.

The following description is some theoretical additions to the measurement method:

as to the use of sodium hydroxide solution; the flue gas is usually subjected to desulfurization and denitrification treatment, the sulfur content of the flue gas collected by the sampling gun 102 is very low, and sulfur dioxide interferes with the measurement of arsenic, so that the elimination of the interference of sulfur dioxide is one of the reasons for selecting sodium hydroxide; on the other hand, sodium hydroxide may react with arsenic compounds without changing its valence state.

The specific sampling process is as follows:

the specific reaction between the sodium hydroxide solution used as the collecting liquid and different arsenic-containing flue gas components is as follows:

As₂O₃+6NaOH＝2Na₃AsO₃+3H₂O

As₂O₅+2NaOH＝Na₂As₂O₆+H₂O

H₃AsO₄+3NaOH＝3H₂O+Na₃AsO₄

H₃AsO₃+3NaOH＝Na₃AsO₃+3H₂O

the method is characterized in that a laboratory simulated flue gas system is used for testing for 5-10 times, the arsenic concentration at a flue gas inlet is 149.5 mu g/m3 detected by adopting ICP-OES, the temperature at a flue gas outlet is 65 ℃, the integral error of a simulation experiment is +/-5%, the flow rate of flue gas is set to be 1.2L/min, after concentrated sulfuric acid digestion treatment is carried out on a sample dissolved in sodium hydroxide, ICP-OES is used for detection, the concentration of the obtained arsenic sampled by adopting the device is 111.4 mu g/m3, and the sampling efficiency reaches 74.5%.

The operation process is as follows: the flue gas sampling gun of the device is connected with a dust removal device, and further, nitrogen with a certain flow rate is input through a nitrogen pipeline 2 of the sampling gun 102; the pressure regulating pump 103a works to make the existing flow rate of the flue gas consistent with the flow rate in the dust removing device; further, the flue gas enters the filtering device, the heating assembly 300 starts to operate and maintains the temperature at 220 ℃ and 240 ℃, and particles with the particle size larger than 1 μm are accumulated on the glass cover 202; the residual flue gas enters a sodium hydroxide solution, and particulate matters smaller than 1 mu m in the components of the flue gas are collected by the sodium hydroxide solution; furthermore, the residual tail gas is treated by activated carbon.

Example 2

Referring to fig. 1-3, this embodiment differs from the first embodiment in that: the heating assembly 300 comprises a heating plate 301 arranged in a shell 101, a heating pipeline 302 arranged on the heating plate 301 and a heating resistance wire arranged in the heating pipeline 302, a temperature receptor 303 is arranged in the shell 101, a temperature-unloading part 304 is arranged in the shell 101, the temperature-unloading part 304 comprises a temperature-unloading hole 305 arranged on the shell 101, a fan arranged in the temperature-unloading hole 305 and a switch plate 306 connected to the temperature-unloading hole 305 in a sliding manner, a slide way 307 is arranged on the switch plate 306, a bent way 308 is arranged at the front end of the slide way 307, a first slide way 400 and a second slide way 401 are arranged on the shell 101, the first slide way 400 is arranged far away from the temperature-unloading hole 305, auxiliary bent ways are arranged at one ends, close to the temperature-unloading hole 305, of the first slide way 400 and the second slide way 401, a matching piece 403 matched with the first slide way 400 and the second slide way 401 is arranged on the switch plate 306, and the first clamping plate 403a, a, The second clamping plate 403b is arranged on the switch board 306, and the sliding blocks 403c are arranged on the first clamping plate 403a and the second clamping plate 403b, the first clamping plate 403a corresponds to the first slide way 400, the second clamping plate 403b is matched with the second slide way 401, the sliding block 403c is provided with a rotating wheel, a driving air cylinder is arranged in the shell 101, the sliding inner sliding is connected with a sliding block, and the driving air cylinder is connected with the sliding block.

Specifically, in this embodiment, the heating assembly 300 includes a heating plate 301 disposed in the housing 101, a heating pipeline 302 is further disposed on the heating plate 301, the heating pipeline 302 is located below the filtering assembly 200, a heating resistance wire is further disposed inside the heating pipeline 302, and heating is achieved after the heating pipeline 302 is powered on, so that the inside of the whole housing 101 is heated.

Then a temperature receptor 303 is arranged in the shell 101, a temperature discharging piece 304 is arranged in the shell 101, the temperature discharging piece 304 comprises a temperature discharging hole 305 formed in the shell 101, the temperature discharging hole 305 is square, then a fan is arranged in the temperature discharging hole 305, then a switch board 306 is arranged in the temperature discharging hole 305 in order to open the temperature discharging hole 305 when temperature discharging is carried out, a slide way 307 is arranged at the lower end of the switch board 306, a bent way 308 is arranged at one end, far away from the temperature discharging hole 305, of the slide way 307, a first slide way 400 and a second slide way 401 are arranged on the shell 101 for sliding, the first slide way 400 is arranged at the position far away from the temperature discharging hole 305, auxiliary bend ways are arranged at one ends, close to the temperature discharging hole 305, of the first slide way 400 and the second slide way 401, and then a matching piece 403 with the first slide way 400 and the second slide way 401 is arranged on the switch board 306.

In this embodiment, the mating member 403 includes a first locking plate 403a disposed on the switch board 306, the first locking plate 403a corresponds to the first sliding track 400, a second locking plate 403b is disposed at an end of the switch board 306 away from the temperature release hole 305, the second locking plate 403b corresponds to the second sliding track 401, and a sliding block 403c is disposed on each of the first locking plate 403a and the second locking plate 403b, a rotating wheel is disposed on the sliding block 403c, a driving cylinder is disposed in the casing 101, and a sliding block is slidably connected in the sliding block and is connected to the driving cylinder.

The rest of the structure is the same as in example 1.

Example 3

Referring to fig. 1, this embodiment differs from the above embodiment in that: the pressure regulating part 103 comprises a pressure regulating pump 103a and a pressure regulating pipe arranged on the pressure regulating pump 103a, the pressure regulating pipe is connected with the shell 101 and the sampling gun 102, two ends of the pressure regulating pipe are rotatably connected with connecting rings, clamping rods are arranged on the connecting rings, matching rings matched with the connecting rings are arranged on the sampling gun 102 and the shell 101, and bayonets matched with the clamping rods are arranged on the matching rings.

Specifically, in this embodiment, the pressure regulating part 103 is a pressure regulating pump 103a, a pressure regulating pipe is arranged on the pressure regulating pump 103a, the pressure regulating pipe is connected with the casing 101 and the sampling gun 102, two ends of the pressure regulating pipe are rotatably connected with connecting rings, and for convenience of connection, two ends of the pressure regulating pipe are rotatably connected with the connecting rings, clamping rods are arranged on the connecting rings, matching rings matched with the connecting rings are arranged on the sampling gun 102 and the casing 101, and clamping bayonets matched with the clamping rods are arranged on the matching rings.

The rest of the structure is the same as in example 1.

Example 4

Referring to fig. 4 and 5, this embodiment is different from the above embodiment in that: the pressure regulating part 103 comprises a communicating pipe 500 connected with the sampling gun 102, a blocking ball 501 connected in the connecting pipe in a sliding way and a connecting rod 502 arranged at the rear end of the blocking ball 501, the blocking ball 501 is connected with the sampling gun 102, a first latch 503 is arranged on the connecting rod 502, a rotating rod 504 is connected in the communicating pipe 500 in a rotating way, a second latch 505 matched with the first latch 503 is arranged at the front end of the rotating rod 504, a rotating roller 506 is connected with the rotating wheel of the communicating pipe 500, a blocking block 507 is arranged on the rotating roller 506, wherein a rotating wheel 508 is arranged at the end part of the rotating rod 504, an arc surface 509 matched with the rotating wheel 508 is arranged on the blocking block 507, a torsion spring 509a is arranged on a rotating shaft of the rotating rod 601504, a fan blade 600 is connected in the sampling gun 102 in a rotating way, a rotating rod 601 extends outwards from the rotating rod 504, a driving rope 602 is arranged on the rotating rod 601, auxiliary wheels 603 are arranged inside and, a fixture block 604 is arranged on the driving rope 602, a matching block 605 is arranged outside the sampling gun 102, and an elastic piece 606 is arranged between the matching block 605 and the fixture block 604.

Specifically, the pressure regulating member 103 includes a communicating pipe 500 connected to the sampling gun 102, a blocking ball 501 is further slidably connected in the communicating pipe 500, a connecting rod 502 is connected to the rear end of the blocking ball 501, the connecting rod 502 horizontally extends out and is placed in the blocking ball 501, a rotating rod 601504 is further rotatably connected in the communicating pipe 500, a rotating plane of the rotating rod 601504 is horizontally arranged, a first latch 503 is arranged on the connecting rod 502, a second latch 505 matched with the first latch 503 is arranged at the front end of the rotating rod 601504, a rotating roller 506 is connected to the rotating wheel of the communicating pipe 500, the rotating plane of the rotating roller 506 is vertically arranged, and a blocking block 507 is arranged on the rotating roller 506, wherein a rotating wheel 508 is arranged at the end of the rotating rod 601504, the rotating plane of the rotating wheel 508 is horizontally arranged, a rotating side wall of the rotating wheel 508 is abutted against a side wall of the rotating wheel 508, and an arc surface 509 matched with the rotating wheel 508 is arranged on the blocking block 507, the arc 509 extends towards the inside of the rotating wheel 508, and when the rotating wheel 508 moves, the arc 509 is abutted to the rotating rod 601504, so that the front end drives the blocking ball 501 to move back and forth.

Further, a torsion spring 509a is arranged on a rotating shaft of the rotating rod 504, a fan blade 600 is connected in the sampling gun 102 in a rotating mode, a rotating rod 601 extends outwards from the rotating rod 504, a driving rope 602 is arranged on the rotating rod 601, an auxiliary wheel 603 is arranged inside and outside the sampling gun 102, the driving rope 602 is connected with the fan blade 600 after bypassing the auxiliary wheel 603, a clamping block 604 is arranged on the driving rope 602, a matching block 605 is arranged outside the sampling gun 102, an elastic part 606 is arranged between the matching block 605 and the clamping block 604, and further after the fan blade 600 is rotated by the driving rope 602, the rotation of the fan blade 600 is driven after rotation, and at the moment, the blocking ball 501 also blocks the sampling gun 102, the fan blade 600 can accelerate the smoke inside, and further after the blocking ball 501 moves away, the blocked smoke can ensure that the pressure and the flow rate are stably sprayed outwards.

The rest of the structure is the same as in example 2.

It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.