A volatile organic compound sampling device for waste gas from fixed pollution sources

Abstract

The present invention relates to the field of waste gas sampling. The present invention discloses a sampling device for volatile organic compounds in waste gas from a fixed pollution source, comprising a protective cover, wherein the protective cover is provided with a sampler with an L-shaped structure, wherein the sampler comprises a support seat, wherein the support seat with a hollow structure inside is fixed at the upper end of the protective cover; the present invention realizes continuous rotation of a rotating shaft by reciprocatingly pinching and releasing a trigger, thereby driving the rotating shaft to rotate, driving the turbine blades to rotate inside a shell, and causing water inside the shell to rotate together with the impeller. Under the action of centrifugal force, water is accelerated to be thrown into a liquid inlet pipe, and then flows inside a spiral long tube, and the water circulation is manually accelerated to take away the heat of the waste gas. In this way, during the manual waste gas sampling process, personnel only need to manually pinch and release the trigger to accelerate the water circulation and realize waste gas cooling and temperature reduction, without the need for operation with the aid of an external power supply device, thereby making the entire sampler more flexible, manual and practical, convenient to carry, and energy-saving.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas sampling, and in particular to a device for sampling volatile organic matter in waste gas from a fixed pollution source. Background Art

[0002] Solid pollutant waste gas usually refers to pollutants in solid or semi-solid form generated in industrial production, construction, transportation and social life. They may be discharged into the environment along with waste gas. Therefore, it is necessary to sample the solid pollutant waste gas and then detect volatile organic compounds.

[0003] In the process of exhaust gas sampling at some special fixed pollution source locations, such as flue locations, manual sampling is required. Usually, a handheld sampler is used to sample the exhaust gas into a sampling container for storage. When the manual sampler is used for exhaust gas sampling, the exhaust gas temperature discharged from the flue is too high. Direct sampling can easily cause the inside of the sampler to expand due to heat and damage the sampler. It is difficult to configure an electrically driven cooling mechanism for the manual sampler. In addition, the exhaust gas with too high a temperature may expand, volatilize components, and increase the chemical reaction rate due to temperature changes during the sampling process, affecting the stability of the exhaust gas sample. As a result, the exhaust gas sample cannot maintain its original state after collection, affecting subsequent analysis and test results.

[0004] Based on this, a fixed pollution source exhaust gas volatile organic compound sampling device is proposed here to solve the above problems. Summary of the invention

[0005] In order to overcome the above technical problems, the purpose of the present invention is to provide a fixed pollution source exhaust gas volatile organic compound sampling device, the purpose of the present invention can be achieved by the following technical solutions:

[0006] A fixed pollution source exhaust gas volatile organic matter sampling device, comprising a protective cover, the protective cover is equipped with an L-shaped sampler, the sampler comprises a support seat, the support seat with a hollow structure inside is fixed to the upper end of the protective cover, a sampling tube is fixed through the support seat, a vertically arranged air intake pipe is fixed to the end of the sampling pipe, a sampling container is threadedly arranged inside the protective cover with an opening at the lower end, and the lower end of the air intake pipe extends into the sampling container;

[0007] The sampling tube is provided with a cooling assembly for cooling the gas sampling, and the cooling assembly comprises a spiral long tube, the spiral long tube is transversely sleeved on the outside of the sampling tube, one end of the spiral long tube is fixed with a liquid inlet tube in a V-shaped structure, and the other end of the spiral long tube is fixed with an inclined water outlet pipe;

[0008] The support seat is equipped with a gripping mechanism for manually delivering water inside the spiral long tube;

[0009] The cooling assembly is equipped with a heat dissipation mechanism for exhaust gas cooling;

[0010] The support seat is equipped with a discharge mechanism for discharging the air inside the sampling container.

[0011] Preferably, the grip mechanism includes a support frame, the support frame is fixed to the upper end of the support seat, a handle is fixed to the upper end of the support seat, the lower end of the handle is rotatably connected to a trigger, a spring is fixed between the trigger and the handle, one side of the trigger is rotatably connected to a movable rod, and one end of the movable rod is rotatably connected to a connecting circular plate.

[0012] Preferably, the cooling assembly also includes a water tank, which is fixed at the top of the handle, a shell is fixed on one side of the handle, a downpipe is fixed between the top of the inner wall of the shell and the bottom of the inner wall of the water tank, the shell is rotatably connected to a rotating shaft deviated from the center of the circle, and the rotating shaft is fixed with turbine blades located inside the shell.

[0013] Preferably, one end of the rotating shaft is fixedly connected to the center part of the connecting circular plate, one end of the liquid inlet pipe is obliquely extended into the bottom inner wall of the shell, the upper port of the water outlet pipe is extended into the top inner wall of the water tank, the top inner wall of the protective cover is provided with a threaded groove, and the bottle mouth of the sampling container is provided with a threaded tube matching the threaded groove.

[0014] Preferably, the heat dissipation mechanism includes a rotating column, which is rotatably connected to the inside of the top of the water tank, and a heat dissipation port is provided through the top of the water tank. The rotating column is fixed with a plurality of heat dissipation blades located inside the top of the water tank, and a lightweight belt is connected between the end of the rotating column and the end of the rotating shaft.

[0015] Preferably, the discharge mechanism includes an exhaust port, the exhaust port is penetrated through the upper end of the support seat, the exhaust port is vertically slidably connected to a slide plate, a transversely arranged sealing plate is fixed to the right side of the slide plate, the sealing plate covers the upper right end of the exhaust port, and a force groove is penetrated through the top of the slide plate, wherein the top and the left bottom end of the force groove are wedge-shaped structures.

[0016] Preferably, the discharge mechanism also includes a sliding rod, which is horizontally slidably connected to the support frame, the right end of the sliding rod extends into the force application groove, an upper push block is fixed to the upper right end of the sliding rod, a lower push plate is fixed to the lower right end of the sliding rod, the left end of the sliding rod is rotatably connected to a connecting rod, and the lower end of the connecting rod is rotatably connected to one side of the trigger.

[0017] The present invention provides a method for collecting chips of a fixed pollution source exhaust volatile organic compound sampling device, which is applied to the above-mentioned fixed pollution source exhaust volatile organic compound sampling device and comprises the following steps:

[0018] S1: The plastic products added by the fixture on the top of the workbench are processed by the machine tool body, and the block plastic and the debris plastic produced fall into the receiving frame, and the block plastic is received by the chip removal net, and the debris plastic passes through the chip removal net and falls onto the chip collecting plate, so that the block plastic and the debris plastic are collected in layers, and the block plastic is recycled and the debris plastic is processed;

[0019] S2: During the collection process, the fixed rod and the three rotating columns are driven to rotate around the workbench through the rotation of the rack 2, and the three gears 1 are driven to move and rotate along the inner surface of the rack 1, and the rotating column is also driven to rotate with the axis of the gear 1 as the rotation point, that is, the rotating column rotates, so as to drive the chip collecting plate, the chip removal net, and the material receiving frame to rotate around the workbench, so that the chip removal net evenly collects the fallen debris and block plastics, and drives the spreading plate to rotate, flattening the block plastics on the chip removal net, so that the chip removal net collects more block plastics;

[0020] S3: When the plastic product processing is completed, the block plastic on the chip discharge net is manually collected for recycling and reuse, and when the discharge net is opened, the broken plastic on the chip collecting plate is discharged for recycling.

[0021] Beneficial effects of the present invention:

[0022] 1. During the exhaust gas sampling process of the present invention, the cold water in the water tank flows from the downpipe into the shell under the action of gravity, then flows into the liquid inlet pipe, and then enters the spiral long tube from the end. It flows in a spiral direction around the sampling tube in the spiral long tube in the direction of the spiral box protective cover, taking away the internal heat of the sampling tube, thereby cooling the exhaust gas during the sampling process. Then the water enters the water outlet pipe from the other end of the spiral long tube, and then is discharged into the water tank from the water outlet pipe port to dissipate heat, and then circulates into the spiral long tube, thereby achieving the sampling process of the sampling tube. Water circulates in the spiral long tube to take away the heat of the exhaust gas, thereby preventing damage to the sampler and excessively high exhaust temperature, and reducing the impact of subsequent detection of high-temperature exhaust gas.

[0023] 2. By reciprocatingly squeezing and releasing the trigger, the rotating shaft can be continuously rotated, driving the rotating shaft to rotate, driving the turbine blades to rotate inside the shell, and making the water inside the shell rotate with the impeller. Under the action of centrifugal force, the water is accelerated to be thrown into the liquid inlet pipe, and then enters the spiral long tube to flow. Manually accelerate the water circulation flow to take away the exhaust gas heat. In this way, during the manual exhaust gas sampling process, personnel only need to manually squeeze and release the trigger to accelerate the water circulation flow and realize the exhaust gas cooling. There is no need to operate with the help of external power supply equipment, making the entire sampler more flexible, manual and practical, easy to carry, and energy-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Figure 1A schematic diagram of the structure of a fixed pollution source exhaust volatile organic compound sampling device provided by the present invention;

[0026] Figure 2 The present invention Figure 1 An enlarged schematic diagram of part A is shown;

[0027] Figure 3 The present invention Figure 1 The back diagram shown;

[0028] Figure 4 The present invention Figure 3 An enlarged schematic diagram of part B is shown;

[0029] Figure 5 is a schematic diagram of the heat dissipation mechanism of the present invention;

[0030] Figure 6 It is a schematic diagram of the interior of the cooling assembly and heat dissipation mechanism of the present invention;

[0031] Figure 7 It is a cross-sectional schematic diagram of the sampler of the present invention;

[0032] Figure 8 The present invention Figure 7 An enlarged schematic diagram of part C is shown.

[0033] In the figure: 1. protective cover; 2. cooling component; 21. spiral long tube; 22. liquid inlet pipe; 23. water outlet pipe; 24. water tank; 25. shell; 26. rotating shaft; 27. downpipe; 28. turbine blade; 3. grip mechanism; 31. grip; 32. support frame; 33. trigger; 34. spring; 35. movable rod; 36. connecting circular plate; 4. discharge mechanism; 41. connecting rod; 42. sliding rod; 43. slide plate; 44. exhaust port; 45. push-up block; 46. force groove; 47. push-down plate; 48. sealing plate; 5. heat dissipation mechanism; 51. rotating column; 52. heat dissipation fan blade; 53. heat dissipation port; 54. light belt; 6. sampler; 61. support seat; 62. sampling tube; 63. sampling container; 64. air inlet pipe; 6101. threaded groove; 6301. threaded tube. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0035] See also Figure 1 - Figure 8 As shown, a sampling device for volatile organic compounds in waste gas from a fixed pollution source comprises a protective cover 1, wherein the protective cover 1 is equipped with a sampler 6 of an L-shaped structure, the sampler 6 comprises a support seat 61, the support seat 61 having an internal hollow structure is fixed at the upper end of the protective cover 1, a sampling tube 62 is fixedly passed through the support seat 61, a vertically arranged air inlet pipe 64 is fixedly arranged at the end of the sampling tube 62, a sampling container 63 is arranged with threads inside the protective cover 1 with an opening at the lower end, the lower end of the air inlet pipe 64 extends into the sampling container 63, and the sampling tube 62 is provided with a cooling component 2 for cooling gas sampling; during sampling, the waste gas from the fixed pollution source enters from the end of the sampling tube 62, and then enters the sampling container 63 from the air inlet pipe 64, the air inside the sampling container 63 is squeezed out from the top of the bottle mouth, and sampling is performed, during the sampling process, water flows inside the spiral long tube 21, taking away the internal heat of the sampling tube 62, so that the waste gas is cooled down, and the influence of the subsequent detection of the high-temperature waste gas is reduced;

[0036] See also Figure 1 , Figure 2 , when sampling manually, an example of manually realizing the flow of cold water on the inner wall of the spiral long tube 21 is provided, the support seat 61 is installed with a grip mechanism 3 for manually delivering water inside the spiral long tube 21, the grip mechanism 3 includes a support frame 32, the support frame 32 is fixed to the upper end of the support seat 61, the upper end of the support seat 61 is fixed with a grip 31, the lower end of the grip 31 is rotatably connected with a trigger 33, a spring 34 is fixed between the trigger 33 and the grip 31, one side of the trigger 33 is rotatably connected with a movable rod 35, and one end of the movable rod 35 is rotatably connected with a connecting circular plate 36; when working, the sampling personnel holds the grip 31 with the palm of their hand and pinches the trigger 33 with four fingers (except the thumb), lifts the sampler 6 to make the port of the sampling tube 62 tilt downward close to the flow position of the fixed pollution source exhaust gas, so that the exhaust gas enters the sampling tube 62, and at the same time of sampling, the four fingers squeeze the trigger 33 in the direction of the principle protective cover 1, so that the trigger 33 rotates clockwise and the bottom end is close to the lower end of the grip 31 ( Figure 1 Looking from the front), the spring 34 is squeezed, and the movable rod 35 is driven to move by the rotation of the trigger 33, driving the connecting circular plate 36 to rotate counterclockwise, and then the trigger 33 is released. Under the action of the spring 34, the trigger 33 rotates within a certain range, so that the movable rod 35 moves and pulls the connecting circular plate 36 to continue to rotate counterclockwise, so that in the process of repeatedly squeezing and releasing the trigger 33, the connecting circular plate 36 rotates counterclockwise, so that the rotating shaft 26 connected to the connecting circular plate 36 continues to rotate, and a power is manually provided;

[0037] The cooling assembly 2 includes a spiral long tube 21, which is laterally sleeved on the outside of the sampling tube 62. A liquid inlet pipe 22 with a V-shaped structure is fixed to one end of the spiral long tube 21, and a water outlet pipe 23 arranged obliquely is fixed to the other end of the spiral long tube 21. The cooling assembly 2 also includes a water tank 24, which is fixed to the top of the handle 31. A shell 25 is fixed to one side of the handle 31. A downpipe 27 is fixed between the top of the inner wall of the shell 25 and the bottom of the inner wall of the water tank 24. The shell 25 is rotatably connected to a rotating shaft 26 deviating from the center of the circle, and the rotating shaft 26 is fixed to a turbine blade 28 located inside the shell 25. Cold water is stored inside the water tank 24, and the water tank 24 is on the top and the spiral long tube 21 is on the bottom to form a height difference. During the exhaust gas sampling process, refer to Figure 4 Under the action of gravity, the cold water in the water tank 24 flows from the downpipe 27 into the shell 25, then into the liquid inlet pipe 22, and then enters the spiral long tube 21 from the end, and flows in a spiral shape in the direction of the spiral box protective cover 1 around the sampling tube 62 inside the spiral long tube 21, taking away the internal heat of the sampling tube 62, and realizing the cooling of the exhaust gas during the sampling process. Then the water enters the outlet pipe 23 from the other end of the spiral long tube 21, and then is discharged from the outlet pipe 23 port into the water tank 24 to dissipate heat, and then circulates into the spiral long tube 21, so that during the sampling process of the sampling tube 62, the water circulates inside the spiral long tube 21 to take away the exhaust gas heat, thereby preventing damage to the sampler 6 and excessively high exhaust temperature. During the cooling process By reciprocatingly squeezing and releasing the trigger 33, the rotating shaft 26 can be continuously rotated, driving the rotating shaft 26 to rotate, driving the turbine blades 28 to rotate inside the shell 25, and making the water inside the shell 25 rotate together with the impeller. Under the action of centrifugal force, the water is accelerated to be thrown into the liquid inlet pipe 22, and then enters the spiral long tube 21 to flow. The water circulation is manually accelerated to take away the heat of the exhaust gas. In this way, during the manual exhaust gas sampling process, the personnel only need to manually squeeze and release the trigger 33 to accelerate the water circulation and realize the exhaust gas cooling. There is no need to operate with the help of an external power supply device, making the entire sampler 6 more flexible, manual and practical, easy to carry, and energy-saving.

[0038] In the present application, an implementation example is added, in which the sampling container 63 is a steel cylinder or an air bag, and the thermal expansion caused by the cooled exhaust gas entering the steel cylinder or the air bag is less affected, and even if there is an effect, the expanded air bag can extend outward through the heat dissipation port 53 at the bottom of the protective cover 1.

[0039] The support seat 61 is equipped with a discharge mechanism 4 for discharging the air inside the sampling container 63 .

[0040] One end of the rotating shaft 26 is fixedly connected to the center of the connecting circular plate 36, one end of the liquid inlet pipe 22 is obliquely extended into the bottom inner wall of the shell 25, the upper end of the water outlet pipe 23 is extended into the top inner wall of the water tank 24, a threaded groove 6101 is provided on the top inner wall of the protective cover 1, and a threaded tube 6301 matching the threaded groove 6101 is provided on the bottle mouth of the sampling container 63.

[0041] In order to exhaust the air inside the sampling container 63 during the sampling process, Figure 1 , Figure 5 , Figure 8 The discharge mechanism 4 includes an exhaust port 44, an exhaust port 44 is penetrated at the upper end of the support seat 61, and the exhaust port 44 is vertically slidably connected to the slide plate 43. A sealing plate 48 arranged transversely is fixed on the right side of the slide plate 43, and the sealing plate 48 covers the upper right end of the exhaust port 44. A force-applying groove 46 is penetrated at the top of the slide plate 43, wherein the top and the left bottom end of the force-applying groove 46 are wedge-shaped structures; after the exhaust gas enters the sampling container 63 through the sampling tube 62 and the air inlet pipe 64, the air inside the sampling container 63 is squeezed out and discharged through the exhaust port 44 above. During the discharge process, in order to reduce the outflow of exhaust gas inside the sampling bottle, a sealing plate 48 is set at the upper end of the exhaust port 44, and the sealing plate 48 is moved up and down by intermittently moving up and pushing down the slide plate 43, so that the exhaust port 44 is intermittently opened, so that the air squeezed out of the sampling container 63 is intermittently discharged from the exhaust port 44, thereby reducing the exhaust gas discharge until the sampling container 63 has finished sampling the exhaust gas. Embodiment 2

[0042] See also Figure 5 , Figure 7 , Figure 8 In order to realize intermittent opening of the exhaust port 44, the discharge mechanism 4 also includes a sliding rod 42, which is horizontally slidably connected to the support frame 32, and the right end of the sliding rod 42 extends into the force application groove 46. An upper push block 45 is fixed to the upper right end of the sliding rod 42, and a lower push plate 47 is fixed to the lower right end of the sliding rod 42. The left end of the sliding rod 42 is rotatably connected to the connecting rod 41, and the lower end of the connecting rod 41 is rotatably connected to one side of the trigger 33; in the process of pinching and releasing the trigger 33 to realize the continuous rotation of the turbine blades 28 to accelerate the flow of water, the connecting rod 41 is driven to move by the rotation of the trigger 33, and the sliding rod 42 is moved left and right under the action of the connecting rod 41. Figure 8 Looking from the front, when the sliding rod 42 moves to the left, it drives the upper push block 45 and the lower push plate 47 to move to the left, and the top end of the upper push block 45 squeezes the upper surface of the force groove 46, so that the slide plate 43 moves up, driving the sealing plate 48 to move up and open the exhaust port 44. When the sliding rod 42 moves to the right, it drives the upper push block 45 and the lower push plate 47 to move to the right, and the bottom end of the lower push plate 47 squeezes the lower surface of the force groove 46, so that the slide plate 43 moves down, driving the sealing plate 48 to move down and cover the exhaust port 44. In this way, the exhaust port 44 is automatically opened and closed under the action of the trigger 33, and the air is discharged intermittently. Embodiment 3

[0043] See also Figures 4 to 6The cooling assembly 2 is equipped with a heat dissipation mechanism 5 for exhaust gas cooling. In order to achieve rapid heat dissipation of water, the heat dissipation mechanism 5 includes a rotating column 51, which is rotatably connected to the top of the water tank 24. A heat dissipation port 53 is provided at the top of the water tank 24. The rotating column 51 is fixed with a plurality of heat dissipation blades 52 located inside the top of the water tank 24. A lightweight belt 54 is connected between the end of the rotating column 51 and the end of the rotating shaft 26; when the rotating shaft 26 is rotated by the trigger 33 to make the turbine blades 28 rotate continuously to accelerate the flow of water, the rotating column 51 is rotated under the action of the lightweight belt 54, driving the heat dissipation blades 52 to rotate at the upper end of the water tank 24, stirring the air at the upper end of the water tank 24, so that the hot water flowing into the water tank 24 is quickly heat-exchanged with the surrounding air for cooling, so that the cooled water enters the spiral long tube 21 and flows away the heat of the exhaust gas.

[0044] Working principle: the sampling personnel hold the handle 31 and the trigger 33, and hold the sampler 6 to sample the waste gas from the solid pollution source. The waste gas enters from the end of the sampling tube 62, and then enters the sampling container 63 from the air inlet pipe 64. The air inside the sampling container 63 is squeezed out from the top of the bottle mouth. During the sampling process, the trigger 33 is squeezed and released reciprocally to realize the continuous rotation of the rotating shaft 26, which drives the rotating shaft 26 to rotate, and drives the turbine blades 28 to rotate inside the shell 25, so that the water inside the shell 25 rotates with the impeller. Under the action of centrifugal force, the water is accelerated to be thrown into the liquid inlet pipe 22, and then enters the spiral long tube 21 from the end, and spirally flows in the spiral long tube 21 around the sampling tube 62 in the direction of the spiral box protective cover 1. , taking away the internal heat of the sampling tube 62, realizing the cooling of the exhaust gas during the sampling process, and then the water enters the water outlet pipe 23 from the other end of the spiral long tube 21, and then is discharged into the water tank 24 from the port of the water outlet pipe 23 to dissipate heat, so that the cooled exhaust gas enters the sampling container 63, reduces the thermal expansion of the sampler 6, and reduces the impact of the subsequent detection of high-temperature exhaust gas. During the continuous rotation of the rotating shaft 26, under the action of the lightweight belt 54, the rotating column 51 rotates, driving the heat dissipation fan blades 52 to rotate at the upper end of the water tank 24, stirring the air at the upper end of the water tank 24, so that the hot water flowing into the water tank 24 quickly exchanges heat with the surrounding air for cooling, so that the cooled water enters the spiral long tube 21 and flows to take away the heat of the exhaust gas. When the sampling is completed, the sampling container 63 is rotated to collect the exhaust gas.

[0045] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A device for sampling volatile organic compounds in waste gas from a fixed pollution source, comprising a protective cover (1), characterized in that: The protective cover (1) is equipped with a sampler (6) of L-shaped structure, wherein the sampler (6) comprises a support seat (61), wherein the support seat (61) having a hollow structure inside is fixed to the upper end of the protective cover (1), wherein a sampling tube (62) is fixedly passed through the support seat (61), wherein the end of the sampling tube (62) is fixedly connected to a vertically arranged air intake pipe (64), and the protective cover (1) having an opening at the lower end is internally threadedly provided with a sampling container (63), wherein the lower end of the air intake pipe (64) extends into the sampling container (63); The sampling tube (62) is provided with a cooling assembly (2) for cooling the gas sample. The cooling assembly (2) comprises a spiral long tube (21). The spiral long tube (21) is laterally sleeved on the outside of the sampling tube (62). One end of the spiral long tube (21) is fixedly connected to a liquid inlet tube (22) in a V-shaped structure. The other end of the spiral long tube (21) is fixedly connected to an inclined water outlet tube (23). The cooling assembly (2) further comprises a water tank (24). The water tank (24) is fixed to the top of the handle (31). One side of the handle (31) is fixed with a A shell (25), a downpipe (27) is fixedly connected between the top end of the inner wall of the shell (25) and the bottom end of the inner wall of the water tank (24), the shell (25) is rotatably connected to a rotating shaft (26) deviating from the center of a circle, the rotating shaft (26) is fixedly connected to a turbine blade (28) located inside the shell (25), one end of the rotating shaft (26) is fixedly connected to the center of a connecting circular plate (36), one end of the liquid inlet pipe (22) is obliquely extended into the inner wall of the bottom end of the shell (25), and the upper end of the water outlet pipe (23) is extended into the inner wall of the top end of the water tank (24); The support seat (61) is provided with a gripping mechanism (3) for manually delivering water to the interior of the spiral long tube (21), the gripping mechanism (3) comprising a support frame (32), the support frame (32) being fixed to the upper end of the support seat (61), the upper end of the support seat (61) being fixed with a gripping handle (31), the lower end of the gripping handle (31) being rotatably connected to a trigger (33), a spring (34) being fixed between the trigger (33) and the gripping handle (31), one side of the trigger (33) being rotatably connected to a movable rod (35), one end of the movable rod (35) being rotatably connected to a connecting circular plate (36), the end of the movable rod (35) being connected to an eccentric position of the connecting circular plate (36); The cooling assembly (2) is provided with a heat dissipation mechanism (5) for cooling exhaust gas. The heat dissipation mechanism (5) comprises a rotating column (51). The rotating column (51) is rotatably connected to the interior of the top end of a water tank (24). A heat dissipation port (53) is provided through the top end of the water tank (24). A plurality of heat dissipation blades (52) located inside the top end of the water tank (24) are fixedly connected to the rotating column (51). A light belt (54) is connected between the end of the rotating column (51) and the end of the rotating shaft (26).

2. The volatile organic compound sampling device for waste gas from a fixed pollution source according to claim 1 is characterized in that: The inner wall of the top end of the protective cover (1) is provided with a threaded groove (6101), and the mouth of the sampling container (63) is provided with a threaded tube (6301) matching the threaded groove (6101).

3. The volatile organic compound sampling device for waste gas from a fixed pollution source according to claim 1 is characterized in that: The support seat (61) is equipped with a discharge mechanism (4) for discharging the air inside the sampling container (63), the discharge mechanism (4) comprising an exhaust port (44), the exhaust port (44) being penetrated at the upper end of the support seat (61), a slide plate (43) being vertically slidably connected in the exhaust port (44), a sealing plate (48) being fixedly connected to the right side of the slide plate (43), the sealing plate (48) covering the upper right end of the exhaust port (44), a force application groove (46) being penetrated at the top end of the slide plate (43), the top end and the left bottom end of the force application groove (46) being wedge-shaped, the discharge mechanism (4) further comprising a sliding rod (42), the sliding rod (42) being horizontally slidably connected to the support frame (32), the right end of the sliding rod (42) extending into the force application groove (46), an upper push block (45) being fixed to the upper right end of the sliding rod (42), the sliding rod A push plate (47) is fixed to the lower right end of the sliding rod (42); the left end of the sliding rod (42) is rotatably connected to a connecting rod (41); the end of the connecting rod (41) away from the sliding rod (42) is rotatably connected to one side of the trigger (33); the connecting rod (41) is driven to move by the rotation of the trigger (33); under the action of the connecting rod (41), the sliding rod (42) moves left and right; when the sliding rod (42) moves left, the push block (45) is driven ), the lower push plate (47) moves to the left, the top end of the upper push block (45) presses the upper surface of the force groove (46), so that the slide plate (43) moves up, driving the sealing plate (48) to move up to open the exhaust port (44); when the sliding rod (42) moves to the right, the upper push block (45) and the lower push plate (47) move to the right, the bottom end of the lower push plate (47) presses the lower surface of the force groove (46), so that the slide plate (43) moves down, driving the sealing plate (48) to move down to cover the exhaust port (44).

Images