Online closed sampling device for toxic gases

Abstract

This utility model relates to the field of toxic gas sampling technology, and is an online closed sampling device for toxic gases. It includes a transparent box, a box support, an air inlet assembly, and protective gloves. The box support is located at the bottom of the transparent box. The air inlet assembly includes a first straight pipe section, a second straight pipe section, an air inlet hose, and a gas connection hose. An air inlet hole is provided on the top wall of the transparent box. The first straight pipe section extends from the outside of the transparent box through the air inlet hole into the interior of the transparent box. A hand valve is fixedly installed on the second straight pipe section. The front wall of the transparent box is designed with symmetrical double doors, including a left door and a right door. The left and right doors each have symmetrical left and right hand holes, and protective gloves are fixedly installed in both the left and right hand holes to reach into the transparent box. This utility model has a reasonable and compact structure, is easy to use, and improves both the safety and efficiency of online toxic gas sampling.

Description

Technical Field

[0001] This utility model relates to the field of toxic gas sampling technology and is an online closed sampling device for toxic gases. Background Technology

[0002] The physicochemical properties of toxic gases (such as diffusivity and corrosivity), the complexity of the environment, and the uncertainty of the sampling target can directly lead to difficulties in completing the sampling operation efficiently and accurately. On the other hand, improper operation or insufficient protection during toxic gas sampling may directly lead to poisoning of sampling personnel, damage to equipment, or even secondary accidents.

[0003] In chemical plant production facilities, the risks of accidents during online sampling of toxic gases generally include the following two aspects:

[0004] Secondary hazards caused by gas leaks: If a sampling container (such as a gas cylinder or syringe) leaks due to quality problems or improper operation (such as not closing the valve tightly), it may cause the concentration of gas in the surrounding environment to increase, which may not only threaten the sampling personnel, but also spread to non-sampling areas (such as workshops and residential areas).

[0005] Equipment explosion or physical injury: If the sampled gas is a flammable or toxic gas (such as acrylonitrile), and it mixes with air to reach the explosion limit, an explosion may occur if the sampling tool generates static electricity (such as from a collision with a metal container) or comes into contact with an open flame (such as from nearby welding operations).

[0006] In conclusion, the problems of poisoning of sampling personnel and environmental pollution caused by leakage of toxic gases during online sampling of toxic gases have become urgent technical challenges for chemical enterprises. Summary of the Invention

[0007] This invention provides an online closed sampling device for toxic gases, which overcomes the shortcomings of the prior art and can effectively solve the problems of poisoning of sampling personnel and environmental pollution caused by leakage of toxic gases during the existing online sampling process.

[0008] The technical solution of this utility model is achieved through the following measures: an online sealed sampling device for toxic gases, including a transparent box, a box support, an air intake component, and protective gloves. The box support is provided at the bottom of the transparent box. The air intake component includes a first straight pipe section, a second straight pipe section, an air intake hose, and a gas receiving hose. An air intake hole is provided on the top wall of the transparent box. The first straight pipe section extends from the outside of the transparent box through the air intake hole into the interior of the transparent box. The air intake hose, the first straight pipe section, the second straight pipe section, and the gas receiving hose are fixedly connected from top to bottom. A hand valve is fixedly installed on the second straight pipe section. The front wall of the transparent box is provided with a symmetrical double-door, including a left door and a right door. The left door and the right door are respectively provided with a symmetrical left hand hole and a right hand hole. Protective gloves that can be inserted into the interior of the transparent box are fixedly installed in both the left hand hole and the right hand hole.

[0009] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution:

[0010] The above also includes a pipe diameter conversion assembly. The second straight pipe section and the air inlet hose are fixedly connected by the pipe diameter conversion assembly. The pipe diameter conversion assembly consists of a reducer fitting with a larger diameter at the top and a smaller diameter pipe section connected to the reducer fitting, from top to bottom.

[0011] The transparent box has a left wall air inlet, and a one-way valve with an exhaust port facing the inside of the transparent box is fixedly installed on the left wall air inlet. An air filter is fixedly installed on the air inlet of the one-way valve.

[0012] The transparent box has a right wall vent, and an exhaust pipe section is embedded in the right wall vent.

[0013] The intake hose is fixedly installed with a quick-connect fitting; the right end outlet of the exhaust pipe section is fixedly installed with a flange connector; the intake hose and the first straight pipe section, and the second straight pipe section and the reducer are all fixedly connected by high-neck flanges.

[0014] The first straight pipe section and the air inlet on the top wall, the one-way valve and the air inlet on the left wall, and the exhaust pipe section and the exhaust port on the right wall are all sealed and fixed by sealing ring 23.

[0015] The cuffs of the aforementioned protective gloves are fixedly installed on the left and right hand holes using sealing rings, respectively.

[0016] A flow meter is fixedly installed on the first straight pipe section on the upper part of the top wall of the aforementioned transparent box.

[0017] The left edge of the left box door and the right edge of the right box door are respectively hinged to the front edge of the left side wall and the front edge of the right side wall of the transparent box body; a protective lock is fixedly installed on the upper right edge of the left box door and the lower left edge of the right box door; an unlocking mark is set on the left box door and the right box door on the side of the protective lock.

[0018] Sealing strips are fixedly installed on the edges of the door frames of the left and right boxes; and / or, thresholds are also fixedly connected to the transparent box body at the bottom of the left and right boxes.

[0019] This utility model has a reasonable and compact structure and is easy to use. When sampling toxic gases, it can avoid the risk of poisoning to sampling personnel due to leakage of toxic gases, and also avoid the pollution of the environment caused by leakage of toxic gases. It has the advantages of high sampling efficiency and low sampling operation risk. Attached Figure Description

[0020] Appendix Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Appendix Figure 2 For the appendix Figure 1 Schematic diagram of the middle air intake assembly.

[0022] Appendix Figure 3 This is a schematic diagram of the box support structure of this utility model.

[0023] The codes in the attached diagram are as follows: 1 is the transparent enclosure, 2 is the enclosure support, 3 is the first straight pipe section, 4 is the second straight pipe section, 5 is the air inlet hose, 6 is the air connection hose, 7 is the top wall air inlet, 8 is the hand valve, 9 is the left enclosure door, 10 is the right enclosure door, 11 is the left hand hole, 12 is the right hand hole, 13 is the rectangular frame, 14 is the reducer fitting, 15 is the small diameter pipe section, 16 is the left wall air inlet, 17 is the one-way valve, 18 is the right wall exhaust hole, 19 is the exhaust pipe section, 20 is the quick-connect coupling, 21 is the flange connection, 22 is the high neck flange, 23 is the sealing ring, 24 is the sealing pressure ring, 25 is the flow meter, 26 is the protective lock, 27 is the unlocking mark, and 28 is the threshold. Detailed Implementation

[0024] This utility model is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this utility model and the actual situation.

[0025] Unless otherwise specified, all equipment and devices used in this invention are existing, publicly known, and commonly used equipment and devices in the field.

[0026] In this utility model, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.

[0027] The present invention will be further described below with reference to the embodiments and accompanying drawings:

[0028] Example 1: As shown in the attached document Figure 1 , 2 As shown in Figure 3, the online closed sampling device for toxic gases includes a transparent box 1, a box support 2, an air intake assembly, and protective gloves. The box support 2 is provided at the bottom of the transparent box 1. The air intake assembly includes a first straight pipe section 3, a second straight pipe section 4, an air intake hose 5, and a gas receiving hose 6. An air intake hole 7 is provided on the top wall of the transparent box 1. The first straight pipe section 3 extends from the outside of the transparent box 1 through the air intake hole 7 and into the interior of the transparent box 1. The air intake hose 5, the first straight pipe section 3, the second straight pipe section 4, and the gas receiving hose 6 are fixedly connected from top to bottom. A hand valve 8 is fixedly installed on the second straight pipe section 4. The front wall of the transparent box 1 is provided with a symmetrical double-door, which includes a left door 9 and a right door 10. The left door 9 and the right door 10 are respectively provided with a symmetrical left hand hole 11 and a right hand hole 12. Protective gloves that extend into the interior of the transparent box 1 are fixedly installed in both the left hand hole 11 and the right hand hole 12.

[0029] Depending on the requirements, the transparent box 1 can be made by hot-melting several rectangular acrylic sheets together; to ensure the stability of the transparent box 1, a metal box frame can be welded and assembled first, and then several acrylic sheets can be inlaid into the box frame, and glue can be used to fix and seal the gap between the edge of the rectangular acrylic sheet and the metal box frame.

[0030] like Figure 3 As shown, the box support 2 can be a rectangular table-leg type full-frame support. The height of the box support 2 is set to meet the convenience of sampling operation for sampling personnel. The area of ​​the rectangular frame 13 on the top surface of the box support 2 matches the area of ​​the bottom wall of the transparent box 1. The bottom of the transparent box 1 can be fixed to the box support 2 by hinges to ensure the stability of the transparent box 1.

[0031] Protective gloves may be medical or laboratory-grade rubber gloves.

[0032] The inlet hose 5 and the outlet hose 6 can be made of flexible and corrosion-resistant plastic tubing. When sampling personnel perform online gas sampling, the inlet of the inlet hose 5 is fixedly connected to the exhaust pipe of the slow-release gas tank inside the production unit. The sampling personnel place the laboratory-specific gas sampling instrument (such as a double-ended measuring tube) inside the transparent box 1, connect or insert the outlet hose 6 into the double-ended measuring tube, close the left box door 9 and the right box door 10, put their hands into protective gloves, open the hand valve 8, and perform the sample gas collection operation. This effectively avoids the risk of poisoning to sampling personnel due to toxic gas leakage, and also avoids the environmental pollution problem caused by toxic gas leakage. It has the advantages of high sampling efficiency and low sampling operation risk.

[0033] The above-mentioned online closed sampling device for toxic gases can be further optimized and / or improved according to actual needs:

[0034] Example 2: Its difference from Example 1 is as follows: (See attached) Figure 2 As shown, the device also includes a pipe diameter conversion assembly. The pipe diameter conversion assembly is fixedly connected between the second straight pipe section 4 and the air inlet hose 6. The pipe diameter conversion assembly consists of a large-diameter pipe fitting 14 and a small-diameter pipe section 15 connected to the large-diameter pipe fitting 14, from top to bottom.

[0035] Example 3: Its difference from Examples 1 to 2 is as follows: (See attached) Figure 1 As shown, a left wall air inlet 16 is provided on the left side wall of the transparent box 1. A one-way valve 17 with an exhaust port facing the inside of the transparent box 1 is fixedly installed on the left wall air inlet 16. An air filter is fixedly installed at the air inlet of the one-way valve 17.

[0036] Example 4: Its difference from Examples 1 to 3 is as follows: (See attached) Figure 1 As shown, a right wall exhaust hole 18 is provided on the right side wall of the transparent box 1, and an exhaust pipe section 19 is embedded in the right wall exhaust hole 18.

[0037] As needed, during the sampling operation, toxic gases may leak (or overflow) into the transparent box 1. After the sampling operation is completed, the outlet of the exhaust pipe section 19 can be fixedly connected to the waste gas adsorption pipeline in the production unit. The adsorption device on the adsorption pipeline can be started to discharge the residual toxic gases in the transparent box 1. The one-way valve 17 on the left wall of the transparent box 1 can balance the airflow pressure in the transparent box 1, which facilitates the discharge of residual toxic gases in the transparent box 1.

[0038] Example 5: It differs from Examples 1 to 4 in that: as shown in the appendix Figure 1 , 2 As shown, a quick-connect fitting 20 is fixedly installed at the inlet of the intake hose 5; a flange connector 21 is fixedly installed at the right outlet of the exhaust pipe section 19; the intake hose 5 is fixedly connected to the first straight pipe section 3, and the second straight pipe section 4 is fixedly connected to the reducer fitting 14 through a high-neck flange 22.

[0039] As needed, the quick-connect coupling 20 can improve sampling efficiency and facilitate the fixed connection between the air inlet hose 5 and the exhaust pipe of the slow-release gas tank in the production unit.

[0040] Flange connector 21 and high neck flange 22 can enhance the connection strength between pipe sections, facilitate disassembly, and improve the sealing performance of the connection between pipe sections.

[0041] Example 6: Its difference from Examples 1 to 5 is as follows: (See attached) Figure 1 As shown, the first straight pipe section 3 is sealed and fixed with the top wall air inlet 7, the one-way valve 17 is sealed with the left wall air inlet 16, and the exhaust pipe section 19 is sealed with the right wall exhaust hole 18 by the sealing ring 23.

[0042] As needed, the sealing ring 23 can enhance the sealing between the openings on the wall of the transparent housing 1 and the pipe sections or valve body equipment inside the openings.

[0043] Example 7: Its difference from Examples 1 to 6 is as follows: (See attached) Figure 1 As shown, the glove openings of the protective gloves are fixedly installed on the left hand hole 11 and the right hand hole 12 by sealing rings 24.

[0044] As needed, the sealing ring 24 serves to secure the protective glove and enhance the seal between the protective glove and the left hand hole 11 and the right hand hole 12. When the protective glove is damaged, the sealing ring 24 also facilitates the removal and replacement of a new protective glove.

[0045] Example 8: It differs from Examples 1 to 7 in that, as shown in the appendix... Figure 1 As shown, a flow meter 25 is fixedly installed on the first straight pipe section 3 on the upper part of the top wall of the transparent box 1.

[0046] As needed, the sampling personnel can confirm the flow rate of the sampled gas using flow meter 25.

[0047] Example 9: It differs from Examples 1 to 8 in that: as shown in the appendix Figure 1 As shown, the left edge of the left door 9 and the right edge of the right door 10 are respectively hinged to the front edge of the left side wall of the transparent box 1 and the front edge of the right side wall of the transparent box 1; a protective lock 26 is fixedly installed on the upper right edge of the left door 9 and the lower left edge of the right door 10; an unlocking mark 27 is provided on the left door 9 and the right door 10 on the side of the protective lock 26.

[0048] As needed, the protective lock 26 can be a handwheel-rotor protective lock 26.

[0049] Example 10: It differs from Examples 1 to 9 in that, as shown in the appendix... Figure 1 As shown, sealing strips are fixedly installed on the edges of the door frames of the left door 9 and the right door 10; thresholds 28 are also fixedly connected to the transparent box 1 at the bottom of the left door 9 and the right door 10.

[0050] If necessary, when toxic sample gas needs to be collected by solvent absorption, a laboratory-specific instrument containing solvent is placed in a transparent box 1. The toxic sample gas is absorbed by dissolving it with solvent. The resulting absorption liquid is also toxic or corrosive. During the gas collection operation, there is a risk of the solution inside the instrument spilling. Threshold 28 can prevent accidentally spilled liquid from flowing out of the transparent box 1.

[0051] Depending on the needs, the pipelines and equipment of the online closed sampling device for toxic gases may also be equipped with conventional valves, thermometers, and pressure gauges that are known and commonly used in the field, according to production requirements.

[0052] The above technical features constitute various embodiments of this utility model, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

[0053] The usage process of this utility model is as follows: First, the inlet of the air inlet hose 5 is fixedly connected to the exhaust pipe of the slow storage gas tank (toxic gas buffer tank) in the production device. The sampling personnel place the gas sampling device inside the transparent box 1, close the left box door 9 and the right box door 10 and lock the doors. Next, the sampling personnel put on protective gloves and reach into the transparent box 1, fix the air inlet hose 6 to the inlet of the gas sampling device, and open the hand valve 8 to collect gas. Then, after the sampling personnel have completed the gas collection, they close the hand valve 8 and seal the inlet of the gas sampling device. Finally, the outlet of the exhaust pipe section 19 is fixedly connected to the waste gas adsorption pipeline in the production device. The adsorption device on the adsorption pipeline is started to discharge the residual toxic gas in the transparent box 1. The left box door 9 and the right box door 10 are opened, the gas sampling device containing the sample gas is taken out, and the gas sampling device is taken to the laboratory for gas composition analysis.

Claims

1. An on-line closed toxic gas sampling device, characterized by The device includes a transparent enclosure, an enclosure support, an air intake assembly, and protective gloves. The enclosure support is located at the bottom of the transparent enclosure. The air intake assembly includes a first straight pipe section, a second straight pipe section, an air intake hose, and an air connection hose. An air intake hole is provided on the top wall of the transparent enclosure. The first straight pipe section extends from the outside of the transparent enclosure through the air intake hole into the interior of the transparent enclosure. The air intake hose, the first straight pipe section, the second straight pipe section, and the air connection hose are fixedly connected from top to bottom. A hand valve is fixedly installed on the second straight pipe section. The front wall of the transparent enclosure is designed with symmetrical double doors, including a left door and a right door. The left door and the right door are respectively provided with symmetrical left and right hand holes. Protective gloves that can be inserted into the interior of the transparent enclosure are fixedly installed in both the left and right hand holes.

2. The on-line closed toxic gas sampling device according to claim 1, characterized in that It also includes a pipe diameter conversion assembly. The second straight pipe section and the air inlet hose are fixedly connected by the pipe diameter conversion assembly. The pipe diameter conversion assembly consists of a reducer fitting with a larger diameter at the top and a smaller diameter pipe section connected to the reducer fitting, from top to bottom.

3. The on-line closed toxic gas sampling device according to claim 1 or 2, characterized in that An air inlet is provided on the left side wall of the transparent enclosure. A one-way valve with an exhaust port facing the inside of the transparent enclosure is fixedly installed on the air inlet. An air filter is fixedly installed on the air inlet of the one-way valve.

4. The on-line closed toxic gas sampling device according to claim 3, characterized in that The right side wall of the transparent box has a right wall vent, and an exhaust pipe section is embedded in the right wall vent.

5. The on-line closed toxic gas sampling device according to claim 4, characterized in that The intake hose inlet is fixedly equipped with a quick-connect fitting; and / or the right end outlet of the exhaust pipe section is fixedly equipped with a flange connection; and / or the intake hose is fixedly connected to the first straight pipe section and the second straight pipe section is fixedly connected to the reducer fitting via a high-neck flange.

6. The on-line closed toxic gas sampling device according to claim 5, characterized in that The first straight pipe section is sealed and fixed to the top wall air inlet, the one-way valve is sealed to the left wall air inlet, and the exhaust pipe section is sealed to the right wall exhaust outlet by sealing ring 23.

7. The on-line closed toxic gas sampling device according to claim 1 or 2 or 4 or 5 or 6, characterized in that The cuffs of the protective gloves are fixedly installed on the left and right hand holes by sealing rings.

8. The on-line closed toxic gas sampling device according to claim 7, characterized in that A flow meter is fixedly installed on the first straight pipe section at the top of the transparent box.

9. The on-line closed toxic gas sampling device according to claim 8, characterized in that The left edge of the left compartment door and the right edge of the right compartment door are respectively hinged to the front edge of the left side wall and the front edge of the right side wall of the transparent compartment; or / and, a protective lock is fixedly installed on the upper right edge of the left compartment door and the lower left edge of the right compartment door; or / and, an unlocking mark is provided on the left and right compartment doors on the side of the protective lock.

10. The on-line closed toxic gas sampling device according to claim 9, characterized in that Sealing strips are fixedly installed on the edges of the door frames of both the left and right doors; and / or, thresholds are also fixedly connected to the transparent box body at the bottom of the left and right doors.

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