High-toxicity gas sampling device

Abstract

The utility model relates to a high-toxicity gas sampling device. The high-toxicity gas sampling device comprises a sampling bottle, a pipeline assembly, a negative pressure collecting assembly and a negative pressure recycling assembly, the sampling bottle comprises a bottle body; the bottle body is provided with a first opening and a second opening; the pipeline assembly comprises an emptying pipe, a bypass pipe, an air inlet pipe, a sampling pipe and an air outlet pipe, the inlet end of the air inlet pipe is connected with a material production system, and the air inlet pipe is connected with a feeding valve; the sampling tube is provided with a first tube opening and a second tube opening, the first tube opening is detachably and hermetically connected with the first opening, and the second tube opening is detachably and hermetically connected with the second opening; the air outlet pipe is connected with a recovery valve, and the outlet end of the air outlet pipe is connected with a negative pressure recovery assembly. A bypass valve is connected to the bypass pipe and is used for controlling the on-off of the bypass pipe; the emptying pipe is connected with an emptying valve, and the outlet end of the emptying pipe is connected with a negative pressure collecting assembly. According to the high-toxicity gas sampling device, the purity of the sampled sample gas can be ensured, and the sample gas is prevented from leaking after sampling.

Description

Technical Field

[0001] The utility model relates to the technical field of sampling of gas materials, in particular to a highly toxic gas sampling device. Background Art

[0002] In the prior art, when sampling highly toxic gas materials produced by the material production system, good air tightness can often be ensured during the sampling stage, and there will be no leakage of highly toxic gas. However, after the sampling is completed, the residual gas in the sampling device may leak, causing safety problems. At the same time, before sampling, there may be impurities such as water vapor or air in the sampling device, which may affect the purity of the sample. Utility Model Content

[0003] The purpose of the utility model is to provide a highly toxic gas sampling device to at least solve one of the above technical problems.

[0004] To achieve the above-mentioned purpose, the utility model provides a highly toxic gas sampling device, comprising a sampling bottle, a pipeline assembly, a negative pressure collection assembly and a negative pressure recovery assembly;

[0005] The sampling bottle comprises a bottle body, a first control valve and a second control valve, the bottle body has a first opening and a second opening, the first opening is controlled to be opened and closed by the first control valve, and the second opening is controlled to be opened and closed by the second control valve;

[0006] The pipeline assembly includes an exhaust pipe, a bypass pipe, and an air inlet pipe, a sampling pipe, and an air outlet pipe that are connected in sequence; the sampling pipe is connected in parallel with the bypass pipe, and one end of the bypass pipe is connected to the air inlet pipe, and the other end is connected to the air outlet pipe;

[0007] The inlet end of the air intake pipe is connected to the material production system, and the air intake pipe is connected to a feed valve, and the feed valve is used to control the on-off of the air intake pipe;

[0008] The sampling tube has a first pipe opening and a second pipe opening, the first pipe opening is detachably sealed and connected to the first opening, and the second pipe opening is detachably sealed and connected to the second opening;

[0009] The air outlet pipe is connected to a recovery valve, and the recovery valve is used to control the on-off of the recovery valve. The outlet end of the air outlet pipe is connected to the negative pressure recovery component;

[0010] The bypass pipe is connected with a bypass valve, and the bypass valve is used to control the on-off of the bypass pipe;

[0011] The drain pipe is located between the recovery valve and the outlet end of the bypass pipe, the drain pipe is connected to a drain valve, the drain valve is used to control the on and off of the drain pipe, and the outlet end of the drain pipe is connected to the negative pressure collection assembly.

[0012] Optionally, the highly toxic gas sampling device further comprises a pressure detection unit, and the pressure detection unit is used to detect the pressure in the sampling bottle and / or the pipeline assembly.

[0013] Optionally, the pressure detection unit is connected to the intake pipe and is located between the intake valve and the bypass pipe.

[0014] Optionally, the sampling bottle further comprises a first quick connector and a second quick connector, the first quick connector is connected to the first opening via the first control valve, and the second quick connector is connected to the second opening via the second control valve;

[0015] The first pipe opening is connected to a first pipeline quick connector, the second pipe opening is connected to a second pipeline quick connector, the first quick connector is detachably sealed and connected to the first pipeline quick connector, and the second quick connector is detachably sealed and connected to the second pipeline quick connector.

[0016] Optionally, the first quick connector and the second pipeline quick connector are male connectors, the second quick connector and the first pipeline quick connector are female connectors, and the first pipeline quick connector and the second pipeline quick connector are detachably sealed and connected.

[0017] Optionally, a hose is connected between the first pipeline quick connector and the first pipe opening, and between the second pipeline quick connector and the second pipe opening.

[0018] Optionally, the exhaust pipe, the bypass pipe, the air inlet pipe, the sampling tube, the air outlet pipe and the bottle body are all made of stainless steel.

[0019] Optionally, the feed valve, the bypass valve, the recovery valve, the drain valve, the first control valve and / or the second control valve are needle valves.

[0020] Optionally, the highly toxic gas sampling device further includes an inert gas supply assembly, wherein the inert gas supply assembly is connected to the air inlet pipe and is used to input inert gas into the pipeline assembly.

[0021] Optionally, the highly toxic gas sampling device further comprises a sampling box, and both the sampling bottle and the pipeline assembly can be located in the sampling box.

[0022] As can be seen from the above, the technical solution provided by the utility model, when sampling, firstly, at least the feed valve and the recovery valve are in a closed state, and the sampling bottle is connected to the pipeline assembly, specifically, the first pipe mouth is connected to the first opening, and the second pipe mouth is connected to the second opening. Then, the first control valve, the second control valve, the bypass valve and the drain valve are opened, the recovery valve is closed, and finally the feed valve is opened to pass the sample gas into the feed pipe, or the feed valve remains closed, and an inert gas is passed into the air inlet pipe. The sample gas or inert gas will pass through the bypass pipe, the sampling tube, the sampling bottle and the air outlet pipe, and finally enter the negative pressure collection assembly. The sample gas or inert gas can purge impurities such as water vapor and air in the pipeline assembly and the sampling bottle to ensure that the pipeline assembly and the sampling bottle are free of impurities. At the same time, the negative pressure collection assembly collects the sample gas or inert gas to avoid air pollution.

[0023] After purging the pipeline assembly and the sampling bottle, close the feed valve or stop introducing inert gas, close the drain valve and bypass valve at the same time, then open the feed valve and recovery valve, keep the first control valve and the second control valve open, and after the sampling bottle is filled with sample gas, close the feed valve, the first control valve and the second control valve, open the bypass valve, and keep the recovery valve open until the sample gas in the pipeline assembly is pumped into the negative pressure recovery assembly, then close the recovery valve to ensure that there is no sample gas remaining in the pipeline assembly to ensure safety. Subsequently, remove the sampling bottle from the pipeline assembly to complete the sampling. The sample gas in the negative pressure recovery assembly can be recycled. At the same time, during the purging process, the gas containing impurities will not enter the negative pressure recovery assembly, thereby ensuring the purity of the sample gas in the negative pressure recovery assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the connection between the sampling pipeline and the sampling bottle provided by the embodiment of the utility model;

[0025] Figure 2 It is a schematic diagram of the structure of a sampling bottle provided by an embodiment of the utility model;

[0026] Figure 3 It is a structural schematic diagram of a sampling pipeline provided by an embodiment of the utility model;

[0027] Figure 4 It is a structural schematic diagram of a highly toxic gas sampling device provided in an embodiment of the utility model.

[0028] In the figure:

[0029] 1. Sampling box; 2. Sampling bottle; 3. Pipeline assembly; 4. Pressure detection unit; 5. Negative pressure recovery assembly; 6. Negative pressure collection assembly;

[0030] 201, first control valve; 202, second control valve; 203, first quick connector; 204, second quick connector; 205, bottle body;

[0031] 301, feed valve; 303, bypass valve; 305, drain valve; 306, recovery valve; 307, drain pipe; 308, bypass pipe; 309, air inlet pipe; 310, sampling pipe; 311, air outlet pipe; 312, first pipeline quick connector; 313, second pipeline quick connector; 314, hose;

[0032] 3101, first pipe opening; 3102, second pipe opening. DETAILED DESCRIPTION

[0033] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the utility model, rather than to limit the utility model. It is also necessary to explain that, for the convenience of description, only the parts related to the utility model are shown in the accompanying drawings, rather than all.

[0034] Some directional words are defined in the present utility model. Unless otherwise specified, the directional words used, such as "upper", "lower", "left", "right", "inside" and "outside", are used for ease of understanding and therefore do not constitute limitations on the protection scope of the present utility model.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] This embodiment provides a highly toxic gas sampling device for sampling gas materials produced by a material production system. In particular, when the material is a highly toxic gas, the highly toxic gas sampling device is also applicable, but not limited to this, and can also be used for sampling non-toxic or low-toxic gas materials.

[0038] like Figure 1-Figure 3 As shown, the highly toxic gas sampling device provided in this embodiment includes a sampling bottle 2, a pipeline assembly 3, a negative pressure collection assembly 6 and a negative pressure recovery assembly 5. The material produced by the material production system enters the sampling bottle 2 through the pipeline assembly 3. The negative pressure collection assembly 6 is mainly used to collect waste gases and impurities such as water vapor and air in the sampling bottle 2 and the pipeline assembly 3. The negative pressure recovery assembly 5 is used to collect the remaining highly toxic gas in the pipeline assembly 3 for reuse, as well as to avoid air pollution and ensure safety.

[0039] Specifically, the sampling bottle 2 includes a bottle body 205 , a first control valve 201 and a second control valve 202 . The bottle body 205 has a first opening and a second opening. The first opening is controlled by the first control valve 201 , and the second opening is controlled by the second control valve 202 .

[0040] The pipeline assembly 3 includes an exhaust pipe 307 , a bypass pipe 308 , and an intake pipe 309 , a sampling pipe 310 , and an outlet pipe 311 which are connected in sequence; the sampling pipe 310 is connected in parallel with the bypass pipe 308 , and one end of the bypass pipe 308 is connected to the intake pipe 309 , and the other end is connected to the outlet pipe 311 .

[0041] Optionally, the air inlet pipe 309, the sampling tube 310 and the air outlet pipe 311 can be a pipeline with an integral structure or a pipeline with a split structure. When it is a pipeline with a split structure, the air inlet pipe 309, the sampling tube 310 and the air outlet pipe 311 can be sealed and connected by structures such as threads. The pipeline formed by the connection of the air inlet pipe 309, the sampling tube 310 and the air outlet pipe 311 can be a straight pipe or a curved pipe. The user can make an adaptive choice according to the space where the highly toxic gas sampling device is located.

[0042] The inlet end of the air inlet pipe 309 is connected to the material production system, and the air inlet pipe 309 is connected to a feed valve 301, which is used to control the on-off of the air inlet pipe 309. The sampling tube 310 has a first pipe opening 3101 and a second pipe opening 3102, the first pipe opening 3101 is detachably sealed and connected to the first opening, and the second pipe opening 3102 is detachably sealed and connected to the second opening. The air outlet pipe 311 is connected to a recovery valve 306, which is used to control the on-off of the recovery valve 306, and the outlet end of the air outlet pipe 311 is connected to a negative pressure recovery component 5. The bypass pipe 308 is connected to a bypass valve 303, which is used to control the on-off of the bypass pipe 308. The drain pipe 307 is located between the recovery valve 306 and the outlet end of the bypass pipe 308. The drain pipe 307 is connected to the drain valve 305, and the drain valve 305 is used to control the opening and closing of the drain pipe 307. The outlet end of the drain pipe 307 is connected to the negative pressure collection component 6.

[0043] When sampling, firstly, at least the feed valve 301 and the recovery valve 306 are closed, and the sampling bottle 2 is connected to the pipeline assembly 3, specifically, the first pipe mouth 3101 is connected to the first opening, and the second pipe mouth 3102 is connected to the second opening. Then, open the first control valve 201, the second control valve 202, the bypass valve 303 and the drain valve 305, close the recovery valve 306, and finally open the feed valve 301 to pass the sample gas into the feed pipe, or keep the feed valve 301 closed and pass an inert gas into the air inlet pipe 309. The sample gas or the inert gas will pass through the bypass pipe 308, the sampling tube 310, the sampling bottle 2 and the air outlet pipe 311, and finally enter the negative pressure collection component 6. The sample gas or the inert gas can purge impurities such as water vapor and air in the pipeline component 3 and the sampling bottle 2 to ensure that the pipeline component 3 and the sampling bottle 2 are free of impurities. At the same time, the negative pressure collection component 6 collects the sample gas or the inert gas to avoid air pollution.

[0044] After the pipeline assembly 3 and the sampling bottle 2 are purged, the feed valve 301 is closed or the inert gas is stopped, and the exhaust valve 305 and the bypass valve 303 are closed at the same time, and then the feed valve 301 and the recovery valve 306 are opened, and the first control valve 201 and the second control valve 202 remain open. After the sampling bottle 2 is filled with sample gas, the feed valve 301, the first control valve 201 and the second control valve 202 are closed, and the bypass valve 303 is opened, and the recovery valve 306 is kept open until the sample gas in the pipeline assembly 3 is pumped to the negative pressure recovery assembly 5, and the recovery valve 306 is closed to ensure that there is no sample gas remaining in the pipeline assembly 3 to ensure safety. Subsequently, the sampling bottle 2 is removed from the pipeline assembly 3 to complete the sampling. The sample gas in the negative pressure recovery assembly 5 can be recycled. At the same time, during the purging process, the gas containing impurities will not enter the negative pressure recovery assembly 5, thereby ensuring the purity of the sample gas in the negative pressure recovery assembly 5.

[0045] In an optional embodiment, the purging process uses an inert gas for purging, and the highly toxic gas sampling device also includes an inert gas supply assembly (not shown in the figure), which is connected to the air inlet pipe 309 and is used to input the inert gas into the pipeline assembly 3.

[0046] Optionally, the inert gas supply assembly is located downstream of the feed valve 301, and the inert gas supply assembly includes an inert gas pipeline, an inert gas valve and a gas source, the gas source is connected to one end of the inert gas pipeline, the other end of the inert gas pipeline is connected to the air inlet pipe 309, and the inert gas valve is connected to the inert gas pipeline to control the on-off of the inert gas pipeline. In other optional embodiments, the feed valve 301 can be a three-way valve, and the inert gas supply assembly includes an inert gas pipeline and a gas source, the gas source is connected to one end of the inert gas pipeline, and the other end of the inert gas pipeline is connected to the three-way valve, so that the on-off of the inert gas pipeline and the air inlet pipe 309 is controlled by the three-way valve.

[0047] The negative pressure recovery component 5 and the negative pressure collection component 6 may both include a connected suction component and a gas storage tank. The suction component may be a vacuum suction pump or any other suction component that can draw the gas in the exhaust pipe 307 or the outlet pipe 311 into the gas storage tank.

[0048] Optionally, the highly toxic gas sampling device further includes a pressure detection unit 4, which is used to detect the pressure in the sampling bottle 2 and / or the pipeline assembly 3. The pressure detection unit 4 can be a pressure gauge, etc., and the user can determine whether the sampling bottle 2 is full of sample gas, or whether the negative pressure collection assembly 6 has completely drawn out the sample gas in the pipeline assembly 3 according to the detection result of the pressure detection unit 4. In this embodiment, the pressure detection unit 4 is connected to the air inlet pipe 309 and is located between the feed valve 301 and the bypass pipe 308.

[0049] Optionally, the exhaust pipe 307, the bypass pipe 308, the air inlet pipe 309, the sampling pipe 310, the air outlet pipe 311 and the bottle body 205 are all made of stainless steel. Stainless steel has the characteristics of high strength, high pressure resistance and not easy to deform, thereby ensuring the safety of the highly toxic gas sampling device.

[0050] The feed valve 301, the bypass valve 303, the recovery valve 306, the drain valve 305, the first control valve 201 and / or the second control valve 202 are needle valves, which have good sealing performance and long service life. The needle valve is made of polytetrafluoroethylene, which is corrosion-resistant, has good sealing performance, reduces the risk of leakage of highly toxic materials, ensures safety and environmental protection, and has the characteristics of simple structure and long service life.

[0051] like Figure 2 and Figure 3As shown, optionally, the sampling bottle 2 further includes a first quick connector 203 and a second quick connector 204 , the first quick connector 203 is connected to the first opening via a first control valve 201 , and the second quick connector 204 is connected to the second opening via a second control valve 202 .

[0052] The first pipe opening 3101 is connected to a first pipeline quick connector 312, the second pipe opening 3102 is connected to a second pipeline quick connector 313, the first quick connector 203 is detachably sealed and connected to the first pipeline quick connector 312, and the second quick connector 204 is detachably sealed and connected to the second pipeline quick connector 313. The sampling bottle 2 can be quickly connected and disconnected through the quick connector. The specific structures of the first quick connector 203, the second quick connector 204, the first pipeline quick connector 312 and the second pipeline quick connector 313 can be quick connectors in the prior art, and the specific structures of the quick connectors are prior art and will not be described in detail herein.

[0053] Preferably, the first quick connector 203 and the second pipeline quick connector 313 are male connectors, the second quick connector 204 and the first pipeline quick connector 312 are female connectors, and the first pipeline quick connector 312 and the second pipeline quick connector 313 are detachably sealed and connected, so that after removing the sampling bottle 2, the first pipeline quick connector 312 and the second pipeline quick connector 313 can also be connected to make the entire pipeline assembly 3 in a closed state, thereby preventing the sample gas from leaking to the outside when the feed valve 301 leaks accidentally.

[0054] A hose 314 is connected between the first pipeline quick connector 312 and the first pipe port 3101, and between the second pipeline quick connector 313 and the second pipe port 3102. The hose 314 can make the positions of the first pipeline quick connector 312 and the second pipeline quick connector 313 variable, so that the first pipeline quick connector 312 can be detachably sealedly connected to the second pipeline quick connector 313 and the first quick connector 203, and the second pipeline quick connector 313 can be detachably sealedly connected to the first pipeline quick connector 312 and the second quick connector 204, respectively.

[0055] like Figure 4 As shown, the highly toxic gas sampling device further comprises a sampling box 1, and the sampling bottle 2 and the pipeline assembly 3 can be located in the sampling box 1. Optionally, the sampling box 1 can be a fume hood, so as to further ensure the safety of the staff.

[0056] Although the utility model has been described in detail above by means of general description, specific implementation methods and tests, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. A highly toxic gas sampling device, characterized in that: It comprises a sampling bottle (2), a pipeline assembly (3), a negative pressure collection assembly (6) and a negative pressure recovery assembly (5); The sampling bottle (2) comprises a bottle body (205), a first control valve (201) and a second control valve (202); the bottle body (205) has a first opening and a second opening; the first opening is controlled to be opened and closed by the first control valve (201); and the second opening is controlled to be opened and closed by the second control valve (202); The pipeline assembly (3) comprises an exhaust pipe (307), a bypass pipe (308), and an air inlet pipe (309), a sampling pipe (310), and an air outlet pipe (311) which are connected in sequence; the sampling pipe (310) is connected in parallel with the bypass pipe (308), and one end of the bypass pipe (308) is connected with the air inlet pipe (309), and the other end is connected with the air outlet pipe (311); The inlet end of the air inlet pipe (309) is connected to the material production system, and the air inlet pipe (309) is connected to a feed valve (301), and the feed valve (301) is used to control the on-off of the air inlet pipe (309); The sampling tube (310) has a first tube opening (3101) and a second tube opening (3102), wherein the first tube opening (3101) is detachably sealed and connected to the first opening, and the second tube opening (3102) is detachably sealed and connected to the second opening; The air outlet pipe (311) is connected to a recovery valve (306), and the recovery valve (306) is used to control the on and off of the recovery valve (306). The outlet end of the air outlet pipe (311) is connected to the negative pressure recovery component (5); The bypass pipe (308) is connected to a bypass valve (303), and the bypass valve (303) is used to control the on-off of the bypass pipe (308); The drain pipe (307) is located between the recovery valve (306) and the outlet end of the bypass pipe (308); the drain pipe (307) is connected to a drain valve (305); the drain valve (305) is used to control the opening and closing of the drain pipe (307); and the outlet end of the drain pipe (307) is connected to the negative pressure collection assembly (6).

2. The highly toxic gas sampling device according to claim 1, characterized in that: The highly toxic gas sampling device further comprises a pressure detection unit (4), wherein the pressure detection unit (4) is used to detect the pressure in the sampling bottle (2) and / or the pipeline assembly (3).

3. The highly toxic gas sampling device according to claim 2, characterized in that: The pressure detection unit (4) is connected to the air intake pipe (309) and is located between the feed valve (301) and the bypass pipe (308).

4. The highly toxic gas sampling device according to claim 3, characterized in that: The sampling bottle (2) further comprises a first quick connector (203) and a second quick connector (204), wherein the first quick connector (203) is connected to the first opening via the first control valve (201), and the second quick connector (204) is connected to the second opening via the second control valve (202); The first pipe opening (3101) is connected to a first pipeline quick connector (312), the second pipe opening (3102) is connected to a second pipeline quick connector (313), the first quick connector (203) and the first pipeline quick connector (312) are detachably sealed, and the second quick connector (204) and the second pipeline quick connector (313) are detachably sealed.

5. The highly toxic gas sampling device according to claim 4, characterized in that: The first quick connector (203) and the second pipeline quick connector (313) are male connectors, the second quick connector (204) and the first pipeline quick connector (312) are female connectors, and the first pipeline quick connector (312) and the second pipeline quick connector (313) are detachably sealed.

6. The highly toxic gas sampling device according to claim 5, characterized in that: A hose (314) is connected between the first pipeline quick connector (312) and the first pipe opening (3101), and between the second pipeline quick connector (313) and the second pipe opening (3102).

7. The highly toxic gas sampling device according to any one of claims 1 to 5, characterized in that: The exhaust pipe (307), the bypass pipe (308), the air inlet pipe (309), the sampling pipe (310), the air outlet pipe (311) and the bottle body (205) are all made of stainless steel.

8. The highly toxic gas sampling device according to any one of claims 1 to 5, characterized in that: The feed valve (301), the bypass valve (303), the recovery valve (306), the drain valve (305), the first control valve (201) and / or the second control valve (202) are needle valves.

9. The highly toxic gas sampling device according to any one of claims 1 to 5, characterized in that: The highly toxic gas sampling device further comprises an inert gas supply assembly, which is connected to the air inlet pipe (309) and is used to input inert gas into the pipeline assembly (3).

10. The highly toxic gas sampling device according to any one of claims 1 to 5, characterized in that: The highly toxic gas sampling device further comprises a sampling box (1), and the sampling bottle (2) and the pipeline assembly (3) can both be located in the sampling box (1).

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