Safe and environment-friendly vinyl chloride gas sampling device

Abstract

The utility model discloses a safe environment-friendly vinyl chloride gas sampling device which comprises a gas sampling and collecting part and a gas sampling and sealing part, the gas sampling and sealing part is assembled on one side of a chemical gas pipeline in a sealing manner, and gas sampling is performed after the gas sampling and collecting part and the gas sampling and sealing part are in sealed butt joint through threads. The gas sampling and collecting device is mainly used for collecting chemical gas so as to detect whether the chemical gas reaches the standard or not, the gas sampling and collecting part and the gas sampling and sealing part are in butt joint through threads, the sealing effect is better during gas sampling, and the gas collecting speed can be adjusted in the sampling process; gas one-way valves are respectively arranged in the gas sampling and collecting part and the gas sampling and sealing part, so that gas leakage can be avoided, and the safety of gas sampling is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas sampling, in particular to a safe and environmentally friendly sampling device for vinyl chloride gas. Background Art

[0002] Chemical gases refer to gases produced or used in the production and use of the chemical industry. These gases are dangerous and may cause harm to human health and the environment. Therefore, corresponding safety measures need to be taken during production and use, and chemical gases need to be obtained through regular sampling to conduct corresponding environmental protection tests. Vinyl chloride, the raw material for PVC production, is a colorless gas with an ethereal aroma, easy to liquefy, highly volatile, with a boiling point of -13.9°C, a critical temperature of 142°C, and a critical pressure of 5.22MPa. Vinyl chloride is a toxic substance. This product is a carcinogen that can cause hepatic angiosarcoma. Liver cancer is related to long-term inhalation and contact with vinyl chloride. It is flammable and can form an explosive mixture when mixed with air. There is a risk of combustion and explosion when encountering heat sources and open flames. The explosion limit is 3.6% to 33% (air). It is more likely to explode under pressure. During storage and transportation, attention must be paid to the sealing and nitrogen sealing of containers. In the actual vinyl chloride sampling operation, the air inlet of the gas collecting cylinder needs to be aligned with the outlet of the gas pipe. However, the air pressure in the gas outlet pipe is relatively high, making it difficult to achieve docking. Moreover, the sealing performance cannot be guaranteed after docking, and leakage is prone to occur, resulting in certain safety hazards. Utility Model Content

[0003] In order to solve the problems existing in the prior art, the utility model provides a safe and environmentally friendly sampling device for vinyl chloride gas, which solves the above-mentioned technical problems.

[0004] To achieve the purpose of the utility model, the utility model adopts the following technical scheme: a safe and environmentally friendly sampling device for vinyl chloride gas, including a gas sampling collection part and a gas sampling sealing part, and the gas sampling sealing part is sealed and assembled on one side of a chemical gas pipeline; the gas sampling collection part and the gas sampling sealing part are connected by threaded sealing to perform gas sampling.

[0005] Furthermore, the gas sampling and collecting part is composed of a collecting chamber, a chamber cover, and an annular protective cover; the collecting chamber is located inside the gas sampling and collecting part; a detachable chamber cover is provided at one end of the collecting chamber; a docking nozzle is also provided at the end of the gas sampling and collecting part away from the chamber cover; an annular protective cover is provided around the docking nozzle; two symmetrical rotating handles are fixed to the outer wall of the gas sampling and collecting part; an external thread is provided on the outer side of the docking nozzle; a plurality of evenly distributed gas delivery ports are provided at the end of the docking nozzle; a gas one-way valve is provided on the inner side of the docking nozzle.

[0006] Furthermore, an internal thread matching the docking nozzle is arranged on the inner side of the gas sampling sealing part; and a second gas one-way valve is arranged inside the gas sampling sealing part.

[0007] Furthermore, the gas one-way valve is composed of a valve core A, a guide shaft a and a limit head; the valve core A is penetrated by a guide shaft a respectively; the end heads of the two guide shafts a are fixed with the limit heads one; the two guide shafts a are respectively sleeved with a first spring.

[0008] Furthermore, the gas one-way valve 2 is composed of a valve core B, a guide shaft b and a second limit head; the valve core B is penetrated by a guide shaft b; the end heads of the two guide shafts b are respectively fixed with the second limit heads; the two guide shafts b are respectively sleeved with a second spring.

[0009] Furthermore, the areas of the valve core A and the valve core B are both larger than the cross-sectional area of ​​the docking nozzle.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] The gas sampling collection part and the gas sampling sealing part are connected by threads, which has a better sealing effect during gas sampling and can adjust the gas collection speed during the sampling process; gas one-way valves are also provided in the gas sampling collection part and the gas sampling sealing part respectively, which can avoid gas leakage and ensure the safety of gas sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the external structure of the utility model during sampling;

[0013] Figure 2 It is a schematic diagram of the internal structure of the utility model during sampling;

[0014] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0015] Figure 4 It is a schematic diagram of the internal structure of the gas one-way valve 2 of the utility model before sampling;

[0016] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0017] In the figure: 1-gas sampling and collecting part; 2-gas sampling sealing part; 3-chemical gas pipeline; 4-collecting chamber; 5-chamber cover; 6-annular protective cover; 7-rotating handle; 8-docking nozzle; 9-gas delivery port; 10-valve core A; 11-guide shaft a; 12-limit head one; 13-first spring; 14-valve core B; 15-guide shaft b; 16-limit head two; 17-second spring. DETAILED DESCRIPTION

[0018] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention:

[0019] like Figure 1-5 As shown, a safe and environmentally friendly sampling device for vinyl chloride gas includes a gas sampling collection part 1 and a gas sampling sealing part 2. The gas sampling sealing part 2 is sealed and assembled on one side of a chemical gas pipeline 3; the gas sampling collection part 1 and the gas sampling sealing part 2 are connected by threaded sealing and then gas sampling is performed.

[0020] When in use, the gas sampling collection part 1 and the gas sampling sealing part 2 are connected by threads, which has a better sealing effect during gas sampling, and the gas collection speed can be adjusted during the sampling process, which is also more flexible in use.

[0021] Specifically, the gas sampling and collecting part 1 is composed of a collecting chamber 4, a chamber cover 5, and an annular protective cover 6; the collecting chamber 4 is located inside the gas sampling and collecting part 1; a detachable chamber cover 5 is provided at one end of the collecting chamber 4, and the interior of the collecting chamber 4 is completely visualized, which will be more intuitive when sampling; a docking nozzle 8 is also provided at the end of the gas sampling and collecting part 1 away from the chamber cover 5; an annular protective cover 6 is provided around the docking nozzle 8; two symmetrical rotating handles 7 are fixed to the outer wall of the gas sampling and collecting part 1; an external thread is provided on the outer side of the docking nozzle 8; a plurality of evenly distributed gas delivery ports 9 are provided at the end of the docking nozzle 8; a gas one-way valve is provided on the inner side of the docking nozzle 8.

[0022] Specifically, the inner side of the gas sampling sealing part 2 is provided with an internal thread matching the docking nozzle 8 ; and the interior of the gas sampling sealing part 2 is provided with a gas one-way valve 2 .

[0023] Specifically, the gas one-way valve is composed of a valve core A10, a guide shaft a11 and a limit head 12; the valve core A10 is penetrated by guide shafts a11 respectively; the end heads of the two guide shafts a11 are fixed with limit heads 12; the two guide shafts a11 are respectively sleeved with first springs 13.

[0024] Specifically, the gas one-way valve 2 is composed of a valve core B14, a guide shaft b15 and a limit head 16; the valve core B14 is penetrated by a guide shaft b15; the end heads of the two guide shafts b15 are fixed with the limit heads 16; the two guide shafts b15 are respectively sleeved with a second spring 17.

[0025] The valve core A10 and the valve core B14 are pushed by the elasticity of the first spring 13 and the second spring 17 respectively, so as to completely block the inside of the docking nozzle 8 .

[0026] During docking, the auxiliary gas sampling and collecting part 1 is rotated by rotating 7, so as to facilitate the sealed docking between the docking nozzle 8 and the gas sampling sealing part 2. As the docking nozzle 8 is continuously extended, the valve core B14 is docked and opened, and the chemical gas enters the docking nozzle 8 through the gas transmission port 9 with high pressure, and then pushes the valve core A10 to open, and the gas enters the collection chamber 4 for storage, wherein the gas one-way valve 1 can only control the one-way flow of gas, effectively preventing the gas in the collection chamber 4 from being leaked; wherein the gas one-way valve 2 can only control the one-way flow of gas, effectively preventing the gas in the chemical gas transmission pipeline 3 from being leaked.

[0027] Specifically, the areas of the valve core A10 and the valve core B14 are both larger than the cross-sectional area of ​​the docking nozzle 8 .

[0028] The working principle of the utility model is as follows: when sampling, the gas sampling collection part 1 is connected with the gas sampling sealing part 2 through threads. When connecting, the auxiliary gas sampling collection part 1 is rotated by rotating the handle 7, so as to facilitate the sealed connection between the docking nozzle 8 and the gas sampling sealing part 2. As the docking nozzle 8 is continuously extended, the valve core B14 is abutted and opened, and the chemical gas enters the docking nozzle 8 through the gas transmission port 9 with high pressure, and then pushes the valve core A10 to open, and the gas enters the collection chamber 4 for storage, wherein the gas one-way valve 1 can only control the one-way flow of the gas, effectively preventing the gas in the collection chamber 4 from being leaked; wherein the gas one-way valve 2 can only control the one-way flow of the gas, effectively preventing the gas in the chemical gas transmission pipeline 3 from being leaked.

[0029] After the sampling is completed, the auxiliary gas sampling and collecting part 1 is rotated again by rotating the handle 7, the gas sampling and collecting part 1 is disassembled from the gas sampling sealing part 2, and the chemical gas is obtained by opening the cavity cover 5.

[0030] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the utility model according to the technical solution and improved ideas of the utility model, which should be covered by the protection scope of the utility model.

Claims

1. A safe and environmentally friendly sampling device for vinyl chloride gas, comprising a gas sampling and collecting part (1) and a gas sampling sealing part (2), characterized in that: The gas sampling sealing part (2) is sealingly assembled on one side of the chemical gas transmission pipeline (3); the gas sampling collection part (1) and the gas sampling sealing part (2) are butt-jointed via threaded sealing to perform gas sampling.

2. A safe and environmentally friendly sampling device for vinyl chloride gas according to claim 1, characterized in that: The gas sampling and collecting part (1) is composed of a collecting chamber (4), a chamber cover (5), and an annular protective cover (6); the collecting chamber (4) is located inside the gas sampling and collecting part (1); a detachable chamber cover (5) is provided at one end of the collecting chamber (4); a docking nozzle (8) is also provided at the end of the gas sampling and collecting part (1) away from the chamber cover (5); an annular protective cover (6) is provided around the docking nozzle (8); two symmetrical rotating handles (7) are fixed to the outer wall of the gas sampling and collecting part (1); an external thread is provided on the outer side of the docking nozzle (8); a plurality of evenly distributed gas delivery ports (9) are provided at the end of the docking nozzle (8); a gas one-way valve is provided on the inner side of the docking nozzle (8).

3. A safe and environmentally friendly sampling device for vinyl chloride gas according to claim 2, characterized in that: The inner side of the gas sampling sealing part (2) is provided with an internal thread matching the docking nozzle (8); and the interior of the gas sampling sealing part (2) is provided with a second gas one-way valve.

4. A safe and environmentally friendly sampling device for vinyl chloride gas according to claim 3, characterized in that: The gas one-way valve is composed of a valve core A (10), a guide shaft a (11) and a limit head one (12); the valve core A (10) is penetrated by the guide shafts a (11) respectively; the end heads of the two guide shafts a (11) are fixed with the limit heads one (12); the two guide shafts a (11) are respectively sleeved with first springs (13).

5. A safe and environmentally friendly sampling device for vinyl chloride gas according to claim 4, characterized in that: The gas one-way valve No. 2 is composed of a valve core B (14), a guide shaft b (15) and a second limit head (16); the valve core B (14) is penetrated by a guide shaft b (15); the end heads of the two guide shafts b (15) are respectively fixed with the second limit heads (16); the two guide shafts b (15) are respectively sleeved with a second spring (17).

6. A safe and environmentally friendly sampling device for vinyl chloride gas according to claim 5, characterized in that: The areas of the valve core A (10) and the valve core B (14) are both larger than the cross-sectional area inside the docking nozzle (8).

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