A pollution source vacuum chamber gas bag sampler

Abstract

This utility model provides a pollution source vacuum chamber gas bag sampler, including a sampling main unit, a sampling handle, a vacuum chamber, a first three-way pipe, and a second three-way pipe. A vertical partition is installed inside the vacuum chamber, dividing it into left and right negative pressure chambers. Both negative pressure chambers are equipped with detachable end caps. Both the first and second three-way pipes consist of two branch pipes and a main pipe, with valves installed on each of the four branch pipes. The two branch pipe ports of the first three-way pipe are connected to the two negative pressure chambers respectively, and each port has a gas pipe connector extending into one of the negative pressure chambers. The main pipe port of the first three-way pipe is connected to the suction port of the sampling handle via a pipe. The two branch pipe ports of the second three-way pipe are connected to the two negative pressure chambers respectively, and the main pipe port of the second three-way pipe is connected to the suction port of the sampling main unit via a pipe. This pollution source vacuum chamber gas bag sampler has the advantages of reducing gas bag replacement time during continuous sampling, thus improving sampling continuity and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of environmental monitoring technology, specifically to a pollution source vacuum chamber gas bag sampler. Background Technology

[0002] A vacuum chamber air bag sampler is a device that uses the principle of negative pressure to collect air or gas samples. It mainly consists of a negative pressure chamber, a sampling main unit, a flexible air bag, and a sampling handle. The sampling main unit is equipped with a vacuum pump. During sampling, the flexible air bag is placed inside the negative pressure chamber. The vacuum pump draws air out to create a negative pressure environment inside the chamber. External air is drawn into the flexible air bag through the sampling handle and sampling tube. It is mainly used for sampling pollutants such as VOCs in the atmospheric environment and industrial waste gas.

[0003] Traditional vacuum chamber gas bag samplers require depressurization, opening the vacuum chamber lid, and replacing the gas bag after each sampling session before the next sampling can begin. However, in some situations, it's necessary to collect samples from multiple gas bags simultaneously for subsequent testing, such as when sampling harmful gases in a confined space. This requires opening the space for a period of time to collect gas from multiple gas bags at once. Traditional vacuum chamber gas bag samplers have long waiting times for gas bag replacements, resulting in poor sampling continuity. This necessitates keeping the space open for an extended period, which increases the diffusion of harmful gases.

[0004] In order to solve the above problems, people have been seeking an ideal technological solution. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a pollution source vacuum chamber air bag sampler that can reduce the time for air bag replacement during continuous sampling, thereby improving sampling continuity and efficiency.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a pollution source vacuum chamber air bag sampler, comprising a sampling host, a sampling handle, a vacuum chamber, a first three-way pipe, and a second three-way pipe. The vacuum chamber is equipped with a vertical partition that divides the vacuum chamber into left and right negative pressure chambers, each with a detachable end cap. Both the first and second three-way pipes consist of two branch pipes and a main pipe, with valves installed on each of the four branch pipes. The two branch pipe ports of the first three-way pipe are respectively connected to the two negative pressure chambers, and each port has an air pipe connector extending into the negative pressure chamber. The main pipe port of the first three-way pipe is connected to the air extraction port of the sampling handle via a pipe. The two branch pipe ports of the second three-way pipe are respectively connected to the two negative pressure chambers, and the main pipe port of the second three-way pipe is connected to the air extraction port of the sampling host via a pipe.

[0007] Beneficial effects: The vertical partition divides the vacuum chamber into two negative pressure chambers, left and right. Each of the two negative pressure chambers can hold a flexible air bag. The first three-way pipe facilitates switching which flexible air bag the sampling handle is connected to, and the second three-way pipe facilitates switching which negative pressure chamber the sampling host is connected to. This allows for the simultaneous sampling of one flexible air bag and replacement of the other, thereby reducing the air bag replacement time and improving sampling continuity in continuous sampling situations.

[0008] Based on the above, the first three-way pipe is located on the front side of the vacuum chamber, the second three-way pipe is located on the rear side of the vacuum chamber, and the two end caps are located on the left and right ends of the vacuum chamber.

[0009] Beneficial effects: The first tee pipe and the second tee pipe are set on the front and rear sides, making it easier to connect pipes; the two end caps are set on the left and right ends, making it easier to open the negative pressure chamber from the side.

[0010] Based on the above, each of the four corners of the end cap has a round hole, and each of the four corners of the outer wall of the end of the vacuum chamber has an ear plate. Each ear plate has a screw for passing through the round hole, and the screw is locked by a nut after passing through the round hole. Both end caps are provided with a vent valve, and both end caps have a sealing gasket on their inner side.

[0011] Beneficial effects: The end cap is firmly fixed at its four corners through the cooperation of the screw, the round hole and the nut, and the vent valve is set to release air before opening the negative pressure chamber.

[0012] Based on the above, the vacuum chamber is provided with support feet at the four corners of its bottom.

[0013] Beneficial effect: The support legs lift the vacuum chamber off the ground, making it easier to remove the end cap.

[0014] Based on the above, the two branch pipes of the first tee pipe and the second tee pipe are arranged in a straight line and are located close to the outer wall of the vacuum box.

[0015] Beneficial effect: The two branch pipes are arranged in a straight line and close to the outer wall of the vacuum chamber, which makes the external structure of the vacuum chamber more compact. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the pollution source vacuum chamber air bag sampler (top wall removed) in this utility model.

[0017] Figure 2 This is a front structural view of the vacuum chamber in this utility model.

[0018] Figure 3 This is a structural diagram of the end face of the vacuum chamber in this utility model.

[0019] In the diagram: 1. Sampling host; 2. Sampling handle; 3. Vacuum chamber; 4. First tee pipe; 5. Second tee pipe; 6. Vertical partition; 7. Negative pressure chamber; 8. End cap; 9. Valve; 10. Air pipe connector; 11. Ear plate; 12. Screw; 13. Nut; 14. Vent valve; 15. Sealing gasket; 16. Support leg; 17. Flexible air bag. Detailed Implementation

[0020] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0021] like Figure 1-3 As shown, a pollution source vacuum chamber air bag sampler includes a sampling host 1, a sampling handle 2, a vacuum chamber 3, a first three-way pipe 4, and a second three-way pipe 5. The vacuum chamber 3 is provided with a vertical partition 6, which divides the vacuum chamber 3 into two negative pressure chambers 7, left and right. Both negative pressure chambers 7 are provided with detachable end caps 8.

[0022] The first three-way pipe 4 and the second three-way pipe 5 each consist of two branch pipes and one main pipe. Valves 9 are installed on the four branch pipes respectively. The two branch pipes of the first three-way pipe 4 and the second three-way pipe 5 are arranged in a straight line and are located close to the outer wall of the vacuum box 3, so that the external structure is more neat and compact.

[0023] The two branch ports of the first three-way pipe 4 are respectively connected to the two negative pressure chambers 7, and a tracheal connector 10 extending into the negative pressure chamber 7 is provided at the port. The main port of the first three-way pipe 4 is connected to the air extraction port of the sampling handle 2 through a pipe. The two branch ports of the second three-way pipe 5 are respectively connected to the two negative pressure chambers 7, and the main port of the second three-way pipe 5 is connected to the air extraction port of the sampling host 1 through a pipe.

[0024] The first three-way pipe 4 is located on the front side of the vacuum box 3, and the second three-way pipe 5 is located on the rear side of the vacuum box 3, which makes it easier to connect the pipes. The two end caps 8 are located on the left and right ends of the vacuum box 3, making it easier to open the negative pressure chamber 7 from the side.

[0025] The end cap 8 has round holes at each of its four corners. The outer wall of the vacuum chamber 7 has ear plates 11 at each of its four corners. Each ear plate 11 has a screw 12 that passes through the round hole. The screw 12 is locked in place by a nut 13 after passing through the round hole. The end cap 8 can be disassembled and assembled through the cooperation of the screw 12, the round hole, and the nut 13. Both end caps 8 are equipped with vent valves 14 for releasing air before opening the negative pressure chamber 7. Both end caps 8 have sealing gaskets 15 on their inner sides to seal any gaps in the sealing area. The vacuum chamber 3 has four support feet 16 at its bottom corners, which lift the vacuum chamber 3 off the ground, making it easier to disassemble the end caps 8.

[0026] Working principle: The vertical partition 6 divides the vacuum chamber 7 into two negative pressure chambers 7, left and right. Each of the two negative pressure chambers 7 can hold a flexible air bag 17. The flexible air bag 17 is connected to the air pipe connector 10 through a pipe. The valve 9 on the branch pipe of the first three-way pipe 4 can control which flexible air bag 17 the sampling handle 2 is connected to. The valve 9 on the branch pipe of the second three-way pipe 5 can control which negative pressure chamber 7 the sampling host 1 is connected to. In this way, while one flexible air bag 17 is sampling, the other negative pressure chamber 7 can be opened (first open the vent valve 14 to release pressure, then remove the nut 13 and end cap 8) to replace another flexible air bag 17. Then the negative pressure chamber 7 is closed, and after the current flexible air bag 17 has finished sampling, the air path is switched so that the newly replaced flexible air bag 17 can continue sampling. The process of replacing the sampling flexible air bag 17 is repeated, and the efficiency of replacing the flexible air bag 17 is improved in the case of continuous sampling.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A pollution source vacuum box air bag sampler, comprising a sampling main machine, a sampling handle and a vacuum box, characterized in that: It also includes a first three-way pipe and a second three-way pipe. The vacuum chamber is equipped with a vertical partition that divides the vacuum chamber into two negative pressure chambers, left and right. Both negative pressure chambers are equipped with detachable end caps. The first three-way pipe and the second three-way pipe are each composed of two branch pipes and one main pipe. Valves are installed on the four branch pipes respectively. The two branch pipe ports of the first three-way pipe are respectively connected to the two negative pressure chambers and are provided with air pipe connectors that extend into the negative pressure chambers at the ports. The main pipe port of the first three-way pipe is connected to the air extraction port of the sampling handle through a pipe. The two branch pipe ports of the second three-way pipe are respectively connected to the two negative pressure chambers. The main pipe port of the second three-way pipe is connected to the air extraction port of the sampling host through a pipe.

2. The source vacuum box air bag sampler of claim 1, wherein: The first three-way pipe is located on the front side of the vacuum chamber, the second three-way pipe is located on the rear side of the vacuum chamber, and the two end caps are located on the left and right ends of the vacuum chamber.

3. The source vacuum box air bag sampler of claim 2, wherein: The end caps are provided with round holes at the four corners, and the outer walls of the vacuum chamber end are provided with ear plates at the four corners. The ear plates are provided with screws for passing through the round holes. The screws are locked by nuts after passing through the round holes. Both end caps are provided with vent valves, and both end caps are provided with sealing gaskets on their inner sides.

4. The source vacuum box air bag sampler of any of claims 1-3, wherein: The vacuum chamber is equipped with support legs at the four corners of its bottom.

5. The source vacuum box air bag sampler of claim 4, wherein: The two branch pipes of the first tee pipe and the second tee pipe are arranged in a straight line and are located close to the outer wall of the vacuum chamber.

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