A bromine safety sampling device

Abstract

A bromine safety sampling device relates to the field of chemical industry, including a sampling box, a sliding block is provided at the inner bottom of the sampling box, a detachable sampling tube is provided on the top of the sliding block, a lifting column is provided above the sampling tube for vertical lifting, a conical rubber sleeve is fixedly provided on the outer wall of the lifting column, a vertically arranged air inlet pipe and air outlet pipe are fixedly provided on the top of the lifting column, a negative pressure component connected to the air outlet pipe is provided inside the sampling box, a liquid extraction component connected to the air inlet pipe is provided outside the sampling box, the conical rubber sleeve is lowered to abut against the upper port of the sampling tube to form a sealed space with the sampling tube, the negative pressure component can form a negative pressure inside the sampling tube, and bromine is extracted into the sampling tube through the liquid extraction component. The utility model solves the problem that in the process of sampling bromine in a tank truck by the existing bromine sampling device, bromine is easily diffused to the outside of the tank truck to cause harm to the body of the inspector; the process of sampling with a handheld sampling tube is cumbersome, and the amount of sampling is uncontrollable.

Description

Technical Field

[0001] The utility model relates to the field of chemical industry, in particular to a bromine safety sampling device. Background Art

[0002] Bromine is a kind of important material in the chemical industry, mainly used for preparing bromides, and used as common analytical reagents, oxidants, absorbents for ethylene and heavy hydrocarbons, and brominating agents for organic synthesis in the fields of medicine, pesticides, dyes, spices, photographic materials, fire extinguishing agents, mineral processing, metallurgy, leather tanning, water purification, etc.

[0003] When a tank truck carrying bromine transports bromine to a manufacturer, it is necessary to sample and test the bromine inside the tank truck to check whether the bromine in the tank truck meets the quality index requirements of the manufacturer.

[0004] The existing bromine sampling device gradually exposed its shortcomings during use, mainly in the following aspects:

[0005] When taking samples, the inspectors directly open the sampling valve on the tank truck and hold the sampling tube to insert it into the tank truck for sampling. However, bromine is a volatile substance that is extremely toxic and corrosive. After the sampling valve is opened, bromine diffuses to the outside of the tank truck through the sampling valve and is easily inhaled into the body by on-site inspectors, causing harm to the inspectors' bodies. In addition, the process of taking samples with a handheld sampling tube is relatively cumbersome, time-consuming and labor-intensive, and the amount of sampling is uncontrollable.

[0006] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0007] In view of the defects in the prior art, the technical problem to be solved by the utility model is to provide a bromine safety sampling device, which can automatically and quickly sample the bromine in a tank truck, and the sampling amount can be controlled according to demand, while also preventing the bromine from diffusing to the external environment.

[0008] In order to solve the above problems, the utility model provides the following technical solutions:

[0009] A bromine safety sampling device comprises a sampling box, wherein a sliding block is provided at the inner bottom of the sampling box, and a detachable sampling tube is provided at the top of the sliding block.

[0010] A lifting column is provided above the sampling tube for vertical lifting, a conical rubber sleeve is fixedly mounted on the outer wall of the lifting column, a vertically arranged air inlet pipe and air outlet pipe are fixedly provided on the top of the lifting column, a negative pressure component connected to the air outlet pipe is provided inside the sampling box, and a liquid extraction component connected to the air inlet pipe is provided outside the sampling box.

[0011] When the conical rubber sleeve descends to abut against the upper end of the sampling tube, a sealed space is formed with the sampling tube. The negative pressure component can form a negative pressure inside the sampling tube, and bromine is extracted into the sampling tube through the liquid extraction component.

[0012] The liquid extraction assembly includes a flange, and four limiting bolts are evenly distributed along the circumference of the top of the flange. The four limiting bolts are rotatably connected to the flange. A vertically arranged liquid extraction pipe is also fixed to the top of the flange, and the lower port of the liquid extraction pipe extends downward and passes through the flange.

[0013] As an optimized solution, the negative pressure assembly includes two vertically arranged fixed cylinders, both of which are placed vertically, and both of which have pistons that are vertically reciprocatingly slidable in the fixed cylinders and in frictional contact with their inner walls, and the two pistons are synchronously and synchronically slidable in the same direction.

[0014] Two hard air tubes connected to their inner cavities are fixedly provided at the facing ends of the two fixed tubes. An air intake check valve and an exhaust check valve are respectively provided on the two hard air tubes on the same fixed tube. The two exhaust check valves are connected to the air outlet pipe through a ventilation pipe.

[0015] As an optimized solution, a suction fan is fixedly provided on the top of the sampling box, and a suction pipe is fixedly provided at the air inlet of the suction fan, and one end of the suction pipe passes through the sampling box and extends to the inside.

[0016] An absorption box is fixedly provided on the top of the sampling box, and an alkaline solution for absorbing bromine is contained inside the absorption box. An exhaust pipe is fixedly provided at the exhaust port of the suction fan, and one end of the exhaust pipe passes through the absorption box and extends to the inside.

[0017] As an optimized solution, a plurality of fixed suction pipes are evenly distributed along the circumference on the top of the flange, and the plurality of suction pipes are alternately arranged with a plurality of limit bolts. The lower end of the suction pipe extends downward and is flush with the bottom surface of the flange.

[0018] As an optimized solution, a three-way solenoid valve is fixedly provided at the lower port of the exhaust pipe, and one of the ports of the three-way solenoid valve is provided with a fixed pipe for communication. One end of the fixed pipe extends to the outside through the sampling box and is sealed. Several of the suction pipes are connected to the fixed pipe through a hose 7.

[0019] As an optimized solution, a rectangular groove is provided at the end of the sampling box, and the sliding block is also slidably arranged horizontally. A sliding plate for controlling the opening and closing of the rectangular groove is fixedly arranged at the end of the sliding block, and a transparent plate is provided at the end of the sliding plate.

[0020] As an optimized solution, a pH detector for detecting the pH value of the alkaline solution inside the absorption box is fixedly provided on the top of the absorption box, and an addition pipe and a waste discharge pipe connected to the inner cavity of the absorption box are fixedly provided on the top and end of the absorption box respectively.

[0021] As an optimized solution, a pressure regulating pipe is fixedly provided on the top of the flange, the lower end of the pressure regulating pipe extends downward and passes through the flange, and the upper end of the pressure regulating pipe is provided with a pressure regulating one-way valve.

[0022] As an optimized solution, a rectangular frame is provided between the two fixed cylinders for vertical reciprocating lifting and lowering, and the top and bottom of the rectangular frame are fixedly connected with vertically arranged connecting rods. The opposite ends of the two connecting rods pass through the two fixed cylinders respectively and are fixedly connected to the two pistons accordingly.

[0023] As an optimized solution, a connecting pipe is fixedly provided at the upper end of the air inlet pipe, and one end of the connecting pipe passes through the sampling box and is connected to the liquid extraction pipe.

[0024] Compared with the prior art, the beneficial effects of the utility model are:

[0025] 1. The negative pressure component and the liquid extraction component can be used to automatically and quickly sample the bromine in the tank truck, and the sampling measurement can be viewed in real time through the transparent plate to control the sampling amount;

[0026] 2. During the process of fixing the flange, the suction fan can absorb the bromine diffused around the sampling valve of the tank truck, and during the sampling process, the suction fan can absorb the bromine diffused in the sampling box, and the absorbed bromine is passed into the absorption box for absorption to prevent the diffused bromine from being inhaled into the body of the tester. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0028] Figure 1 It is a schematic diagram of the structure of the utility model;

[0029] Figure 2 It is a structural schematic diagram of the negative pressure assembly of the utility model;

[0030] Figure 3 It is a structural schematic diagram of the driving motor of the utility model;

[0031] Figure 4 It is a structural schematic diagram of the transparent plate of the utility model.

[0032] In the figure: 1-sliding plate; 2-transparent plate; 3-sampling box; 4-suction fan; 5-absorption box; 6-fixed pipe; 7-hose; 8-suction pipe; 9-flange; 10-limit bolt; 11-liquid extraction pipe; 12-inlet check valve; 13-exhaust check valve; 14-hard air pipe; 15-fixed plate; 16-ventilation pipe; 17-conical rubber sleeve; 18-exhaust pipe; 19-lifting column; 20-inlet pipe; 21-connecting pipe; 22-pressure regulating check valve; 23-pressure regulating pipe; 24-liquid extraction assembly; 25-support plate; 26-fixed cylinder; 27-connecting rod; 28-turntable; 29-guide column; 30-rectangular frame; 31-negative pressure assembly; 32-piston; 33-three-way solenoid valve; 34-vacuum pipe; 35-exhaust pipe; 36-PH detector; 37-addition pipe; 38-waste discharge pipe; 39-first telescopic cylinder; 40-sampling tube; 41-positioning plate; 42-second telescopic cylinder; 43-sliding block; 44-driving motor; 45-rectangular groove. DETAILED DESCRIPTION

[0033] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0034] like Figures 1 to 4 As shown, a bromine safety sampling device includes a sampling box 3, a sliding block 43 is provided at the inner bottom of the sampling box 3, and a detachable sampling tube 40 is provided on the top of the sliding block 43.

[0035] A lifting column 19 is provided above the sampling tube 40 for vertical lifting. A conical rubber sleeve 17 is fixedly mounted on the outer wall of the lifting column 19. A vertically arranged air inlet pipe 20 and an air outlet pipe 18 are fixedly mounted on the top of the lifting column 19. A negative pressure component 31 connected to the air outlet pipe 18 is provided inside the sampling box 3. A liquid extraction component 24 connected to the air inlet pipe 20 is provided outside the sampling box 3.

[0036] When the conical rubber sleeve 17 descends to abut against the upper end of the sampling tube 40, a sealed space is formed with the sampling tube 40. The negative pressure component 31 can form a negative pressure inside the sampling tube 40, and bromine is extracted into the sampling tube 40 through the liquid extraction component 24.

[0037] The liquid extraction assembly 24 includes a flange 9, and four limiting bolts 10 are evenly distributed along the circumferential direction on the top of the flange 9. The four limiting bolts 10 are rotatably connected to the flange 9. A vertically arranged liquid extraction pipe 11 is also fixed on the top of the flange 9. The lower end of the liquid extraction pipe 11 extends downward and passes through the flange 9.

[0038] The negative pressure assembly 31 includes two vertically arranged fixed cylinders 26. The two fixed cylinders 26 are placed vertically. The two fixed cylinders 26 are provided with pistons 32 that are in frictional contact with the inner wall thereof and slide back and forth vertically. The two pistons 32 are synchronously and synchronically slidably arranged.

[0039] Two rigid air tubes 14 connected to the inner cavity of the two fixed tubes 26 are fixedly provided at the ends facing each other. The two rigid air tubes 14 on the same fixed tube 26 are respectively provided with an intake check valve 12 and an exhaust check valve 13. The two exhaust check valves 13 are connected to the exhaust pipe 18 through the ventilation pipe 16.

[0040] When the piston 32 is away from the hard gas tube 14, the air pressure in the fixed tube 26 decreases, and the gas in the sampling tube 40 flows into the fixed tube 26 in one direction through the inlet check valve 12, so that a negative pressure is formed in the sampling tube 40.

[0041] When the piston 32 is close to the hard gas pipe 14 , the gas in the fixed cylinder 26 flows out in one direction through the exhaust check valve 13 .

[0042] A suction fan 4 is fixedly provided on the top of the sampling box 3, and an air inlet of the suction fan 4 is fixedly provided with an air extraction pipe 34 which is connected and arranged. One end of the air extraction pipe 34 passes through the sampling box 3 and extends to the inside.

[0043] An absorption box 5 is fixedly provided on the top of the sampling box 3. Alkaline solution for absorbing bromine is contained in the absorption box 5. An exhaust pipe 35 is fixedly provided at the exhaust port of the suction fan 4. One end of the exhaust pipe 35 passes through the absorption box 5 and extends to the inside.

[0044] The suction fan 4 can absorb the volatilized bromine in the sampling box 3 into the absorption box 5, and the alkaline solution in the absorption box 5 absorbs the bromine.

[0045] A plurality of fixed suction pipes 8 are evenly distributed along the circumferential direction on the top of the flange 9. The plurality of suction pipes 8 and the plurality of limit bolts 10 are alternately arranged. The lower end of the suction pipe 8 extends downward and is flush with the bottom surface of the flange 9.

[0046] A three-way solenoid valve 33 is fixedly connected to the lower port of the air extraction pipe 34, and one of the ports of the three-way solenoid valve 33 is connected to a fixed pipe 6, one end of the fixed pipe 6 passes through the sampling box 3 and extends to the outside, and is sealed, and a plurality of air suction pipes 8 are connected to the fixed pipe 6 through a hose 7;

[0047] When the flange 9 is connected to the tanker sampling valve, the exhaust pipe 34 is connected to the fixed pipe 6 and absorbs the bromine gas volatilized around the sampling valve.

[0048] After the flange 9 is connected to the valve of the tank truck sampling tube 40, the exhaust pipe 34 is connected to the inside of the sampling box 3 to absorb the volatilized bromine gas in the sampling box 3.

[0049] The end of the sampling box 3 is provided with a rectangular groove 45 which is set through, and the sliding block 43 is also set to slide horizontally. The end of the sliding block 43 is fixed with a sliding plate 1 for controlling the opening and closing of the rectangular groove 45, and the end of the sliding plate 1 is provided with a transparent plate 2 which is set through.

[0050] When the sliding block 43 slides to the outside of the sampling box 3, the sampling tube 40 can be taken in and out. When the sliding block 43 slides to abut against the sampling box 3, the rectangular groove 45 is closed.

[0051] A pH detector 36 for detecting the pH value of the alkaline solution inside the absorption box 5 is fixedly provided on the top, and an addition pipe 37 and a waste pipe 38 communicating with the inner cavity of the absorption box 5 are fixedly provided on the top and the end of the absorption box 5, respectively.

[0052] A pressure regulating pipe 23 is fixedly provided on the top of the flange 9, the lower end of the pressure regulating pipe 23 extends downward and passes through the flange 9, and a pressure regulating one-way valve 22 is provided on the upper end of the pressure regulating pipe 23;

[0053] When the air pressure in the tank truck is low, the outside air flows into the tank truck in one direction through the pressure regulating one-way valve 22 to adjust the air pressure.

[0054] A rectangular frame 30 is provided between the two fixed cylinders 26 for vertical reciprocating lifting and lowering. The top and bottom of the rectangular frame 30 are fixedly connected with vertically arranged connecting rods 27 . The opposite ends of the two connecting rods 27 pass through the two fixed cylinders 26 respectively and are fixedly connected to the two pistons 32 accordingly.

[0055] A support plate 25 is fixedly provided at the inner bottom of the sampling box 3 , and a turntable 28 rotatably arranged along a horizontal line is provided at the end of the support plate 25 . A guide column 29 is fixedly connected to the eccentric position of the turntable 28 , and one end of the guide column 29 extends into the rectangular frame 30 .

[0056] A driving motor 44 is fixedly disposed at the other end of the supporting plate 25 . The output end of the driving motor 44 passes through the supporting plate 25 and is fixedly connected to the rotating disk 28 .

[0057] Two first telescopic cylinders 39 are fixedly provided on the top of the sampling box 3 , and the telescopic ends of the two first telescopic cylinders 39 are fixedly connected to the lifting column 19 .

[0058] The opposite side walls of the sliding block 43 are fixedly connected with positioning plates 41 . Two second telescopic cylinders 42 are fixedly provided on the inner wall of the sampling box 3 . The telescopic ends of the two second telescopic cylinders 42 are fixedly connected with the two positioning plates 41 .

[0059] A T-shaped slide plate is fixedly provided at the bottom of the sliding block 43 , and a T-shaped slide groove matching with the T-shaped slide plate is provided at the inner bottom of the sampling box 3 .

[0060] A connecting pipe 21 is fixedly provided at the upper end of the air inlet pipe 20 . One end of the connecting pipe 21 passes through the sampling box 3 and is connected to the liquid extraction pipe 11 .

[0061] The two fixing cylinders 26 are fixedly connected to the support plate 25 via the fixing plate 15 .

[0062] The working principle of this device is:

[0063] Before sampling bromine, the sampling tube 40 is inserted into the sliding block 43, and the second telescopic cylinder 42 is shortened to drive the sliding block 43 and the sliding plate 1 to slide toward the sampling box 3 until the sliding plate 1 abuts against the sampling box 3, and the rectangular groove 45 is closed at the same time. The first telescopic cylinder 39 is extended and drives the lifting column 19 and the conical rubber sleeve 17 to slide downward until the conical rubber sleeve 17 abuts against the upper end of the sampling tube 40 to form a sealed space.

[0064] When sampling, the sampling valve of the tank truck is opened, and the liquid extraction pipe 11 is inserted into the tank truck and connected to the sampling valve through the limit bolt 10. The driving motor 44 drives the turntable 28 and the guide column 29 to rotate, thereby driving the rectangular frame 30, the two connecting rods 27 and the two pistons 32 to vertically reciprocate and lift. Under the cooperation of the air intake check valve 12 and the exhaust check valve 13, the gas in the sampling tube 40 is extracted into the fixed cylinder 26 and discharged into the sampling box 3 through the hard air pipe 14. A negative pressure is formed in the sampling tube 40, and the bromine in the tank truck enters the sampling tube 40 through the liquid extraction pipe 11, the connecting pipe 21 and the air intake pipe 20. The two fixed cylinders 26 can continuously extract liquid from the sampling tube 40, thereby improving the efficiency of liquid extraction. During the liquid extraction process, the bromine metering in the sampling tube 40 can be checked through the transparent plate 2, so that automatic and rapid sampling of bromine in the tank truck is realized, and the sampling amount can be controlled;

[0065] During the connection between the flange 9 and the sampling valve port, the three-way solenoid valve 33 is adjusted to the suction pipe 34 and the fixed pipe 6. Under the suction of the suction fan 4, the bromine diffused in the area around the sampling valve port passes through the suction pipe 8, the hose 7, the fixed pipe 6, the suction pipe 34 and the exhaust pipe 35 in turn and enters the absorption box 5. The alkaline solution in the absorption box 5 absorbs the bromine. During the sampling process, the three-way solenoid valve 33 is adjusted to the suction pipe 34 and the inner cavity of the sampling box 3. The bromine gas discharged from the fixed cylinder 26 passes through the suction pipe 34 and the exhaust pipe 35 and then enters the absorption line for absorption, thereby realizing the function of rapid absorption of the diffused bromine and preventing the diffused bromine from being inhaled into the body by the test personnel;

[0066] The pH value of the alkali solution in the absorption box 5 can be detected by the pH detector 36. When the pH value of the alkali solution in the absorption box 5 is less than a certain value, the alkali solution in the absorption box 5 is replaced through the addition pipe 37 and the waste pipe 38.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A bromine safety sampling device, characterized in that: The sampling box (3) comprises a sliding block (43) at the inner bottom of the sampling box (3), and a detachable sampling tube (40) is provided at the top of the sliding block (43). A lifting column (19) is provided above the sampling tube (40) for vertical lifting, a conical rubber sleeve (17) is fixedly mounted on the outer wall of the lifting column (19), a vertically arranged air inlet pipe (20) and an air outlet pipe (18) are fixedly mounted on the top of the lifting column (19), a negative pressure component (31) connected to the air outlet pipe (18) is provided inside the sampling box (3), and a liquid extraction component (24) connected to the air inlet pipe (20) is provided outside the sampling box (3), When the conical rubber sleeve (17) is lowered to abut against the upper end of the sampling tube (40), a sealed space is formed with the sampling tube (40); the negative pressure component (31) can form a negative pressure inside the sampling tube (40), and bromine is extracted into the sampling tube (40) through the liquid extraction component (24). The liquid extraction assembly (24) comprises a flange (9), the top of the flange (9) is evenly distributed with four limiting bolts (10) penetrating therethrough in the circumferential direction, the four limiting bolts (10) are rotatably connected to the flange (9), and a vertically arranged liquid extraction pipe (11) is also fixedly provided on the top of the flange (9), the lower end of the liquid extraction pipe (11) extends downward and passes through the flange (9).

2. A bromine safety sampling device according to claim 1, characterized in that: The negative pressure assembly (31) comprises two vertically arranged fixed cylinders (26), the two fixed cylinders (26) are both placed vertically, and the two fixed cylinders (26) are both provided with pistons (32) in vertical reciprocating sliding contact with the inner wall thereof, and the two pistons (32) are synchronously arranged to slide in the same direction. Two hard air tubes (14) connected to the inner cavities of the two fixed cylinders (26) are fixedly provided at the facing ends thereof; an intake check valve (12) and an exhaust check valve (13) are respectively provided on the two hard air tubes (14) on the same fixed cylinder (26); the two exhaust check valves (13) are connected to the exhaust pipe (18) via the ventilation pipe (16).

3. A bromine safety sampling device according to claim 2, characterized in that: A suction fan (4) is fixedly provided on the top of the sampling box (3), and an air inlet of the suction fan (4) is fixedly provided with an air extraction pipe (34) which is connected thereto, and one end of the air extraction pipe (34) passes through the sampling box (3) and extends to the inside. An absorption box (5) is also fixedly provided on the top of the sampling box (3), and an alkaline solution for absorbing bromine is contained inside the absorption box (5). An exhaust pipe (35) is fixedly provided at the exhaust port of the suction fan (4) and is connected thereto, and one end of the exhaust pipe (35) passes through the absorption box (5) and extends to the inside.

4. A bromine safety sampling device according to claim 3, characterized in that: A plurality of fixed air intake pipes (8) are evenly distributed along the circumferential direction on the top of the flange (9), and the plurality of air intake pipes (8) and a plurality of limit bolts (10) are alternately arranged. The lower end of the air intake pipe (8) extends downward and is flush with the bottom surface of the flange (9).

5. A bromine safety sampling device according to claim 4, characterized in that: A three-way solenoid valve (33) is fixedly provided at the lower port of the exhaust pipe (34) and is connected thereto. One of the ports of the three-way solenoid valve (33) is provided with a fixed pipe (6) which is connected thereto. One end of the fixed pipe (6) passes through the sampling box (3) and extends to the outside. The fixed pipe (6) is sealed. The plurality of suction pipes (8) are connected to the fixed pipe (6) via a hose (7).

6. A bromine safety sampling device according to claim 5, characterized in that: The end of the sampling box (3) is provided with a rectangular groove (45) which is arranged to penetrate therethrough. The sliding block (43) is also arranged to slide horizontally. A sliding plate (1) which controls the opening and closing of the rectangular groove (45) is fixedly arranged at the end of the sliding block (43). A transparent plate (2) which is arranged to penetrate therethrough is provided at the end of the sliding plate (1).

7. A bromine safety sampling device according to claim 6, characterized in that: A pH detector (36) for detecting the acidity or alkalinity of the alkaline solution inside the absorption box (5) is fixedly provided on the top of the absorption box (5), and an addition pipe (37) and a waste discharge pipe (38) communicating with the inner cavity of the absorption box (5) are fixedly provided on the top and end of the absorption box (5), respectively.

8. A bromine safety sampling device according to claim 7, characterized in that: A pressure regulating pipe (23) is fixedly provided on the top of the flange (9), the lower end of the pressure regulating pipe (23) extends downward and passes through the flange (9), and the upper end of the pressure regulating pipe (23) is provided with a pressure regulating one-way valve (22).

9. A bromine safety sampling device according to claim 8, characterized in that: A rectangular frame (30) is provided between the two fixed cylinders (26) for vertical reciprocating lifting and lowering. The top and bottom of the rectangular frame (30) are both fixedly connected with vertically arranged connecting rods (27). The opposite ends of the two connecting rods (27) pass through the two fixed cylinders (26) respectively and are fixedly connected to the two pistons (32) accordingly.

10. A bromine safety sampling device according to claim 9, characterized in that: A connecting pipe (21) is fixedly provided at the upper end of the air inlet pipe (20), and one end of the connecting pipe (21) passes through the sampling box (3) and is connected to the liquid extraction pipe (11).

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