Detection device for rapidly detecting trace hydrogen sulfide

Abstract

The utility model provides a detection device for rapidly detecting trace hydrogen sulfide, comprising: an air bag having a vent; the regulating valve is arranged at the air vent and is hermetically connected with the air bag; a connecting part; the gas inlet end of the hydrogen sulfide detection pipe is detachably and hermetically connected with the regulating valve through a connecting part; and the volume measurement assembly is detachably connected with the gas outlet end of the hydrogen sulfide detection pipe in a sealing manner through a connecting part, and is used for measuring the volume of the gas introduced into the hydrogen sulfide detection pipe. According to the detection device for rapidly detecting the trace hydrogen sulfide, the two ends of the hydrogen sulfide detection pipe are detachably and hermetically connected with the regulating valve and the volume measurement assembly through the connecting parts, so that the connection tightness in the measurement process is ensured, the sampling volume is accurately controlled, and the accuracy of a final detection result is improved.

Description

Technical Field

[0001] The present application relates to the technical field of gas detection equipment, and in particular to a detection device for rapidly detecting trace amounts of hydrogen sulfide. Background Art

[0002] When using natural gas as raw material for urea production, when the hydrogen sulfide gas in the natural gas exceeds a certain limit, it will reduce the catalytic effect of the catalyst in the production process and affect the quality of the final product. Therefore, it is necessary to detect the concentration of hydrogen sulfide in the natural gas before production for subsequent processing or production. The traditional method of using a chromatograph for detection is not only costly, but also takes a long time to detect.

[0003] In the current production line, a sampling point is set in the natural gas pipeline. When sampling, a syringe is used to extract a preset volume of natural gas at the sampling point, and then the extracted preset volume of natural gas is injected into the hydrogen sulfide detection tube for detection, thereby realizing rapid on-site detection.

[0004] However, when practicing the invention, the inventors found that directly inserting the syringe into the air inlet end of the hydrogen sulfide detection tube resulted in poor sealing effect, which could easily cause the hydrogen sulfide gas in the syringe to leak into the environment, affecting the final detection effect. Utility Model Content

[0005] The purpose of the embodiments of the present application is to provide a detection device for quickly detecting trace amounts of hydrogen sulfide, so as to solve the technical problem that the sealing effect is poor when the syringe and the hydrogen sulfide detection tube are connected, which affects the final detection result.

[0006] In order to solve the above technical problems, the embodiments of the present application provide the following technical solutions:

[0007] The present application provides a detection device for rapidly detecting trace amounts of hydrogen sulfide, comprising:

[0008] An air bag having a vent;

[0009] A regulating valve, arranged at the vent and sealedly connected to the air bag;

[0010] Connecting part;

[0011] A hydrogen sulfide detection tube, the air inlet end of which is detachably and hermetically connected to the regulating valve via the connecting portion;

[0012] A volume measuring component is detachably and hermetically connected to the gas outlet end of the hydrogen sulfide detection tube through the connecting portion, and the volume measuring component is used to measure the volume of the gas passed into the hydrogen sulfide detection tube.

[0013] In some modified implementations of the present application, the connecting portion includes:

[0014] Silicone tube, the regulating valve is detachably and hermetically connected to the air inlet end through the silicone tube; and / or the air outlet end is detachably and hermetically connected to the volume measurement component through the silicone tube.

[0015] In some embodiments, a sealing thread is provided on the outer side of the hydrogen sulfide detection tube, the regulating valve has a first internal thread adapted to the sealing thread, the volume measurement assembly has a second internal thread adapted to the sealing thread, and the sealing thread, the first internal thread and the second internal thread together form the connecting portion.

[0016] In some embodiments, the volume measurement assembly comprises:

[0017] The accommodating portion comprises an accommodating space and an air inlet communicated with the accommodating space, wherein the air outlet is detachably and hermetically connected to the air inlet via the connecting portion;

[0018] The moving part is arranged in the accommodating space, and the moving part is sealingly and slidably connected with the inner wall of the accommodating part.

[0019] In some embodiments, the accommodating portion has a transparent area, the transparent area is provided with a first scale, the first scale corresponds to the moving range of the moving member, and the moving member and the first scale cooperate with each other to measure the volume of the gas passed into the accommodating portion.

[0020] In some embodiments, the moving member includes a first sub-moving member and a second sub-moving member connected to each other, the first sub-moving member and the second sub-moving member are both arranged in the accommodating space and are sealed and slidably connected to the interior of the accommodating portion; the first sub-moving member is arranged between the second sub-moving member and the connecting portion, and the cross-sectional area of ​​the first sub-moving member is greater than the cross-sectional area of ​​the second sub-moving member;

[0021] The first scale includes a first sub-scale and a second sub-scale, the first sub-scale corresponds to the moving range of the first sub-moving member, the second sub-scale corresponds to the moving range of the second sub-moving member, and the accuracy of the second sub-scale is greater than the accuracy of the first sub-scale.

[0022] In some embodiments, the measuring component further comprises:

[0023] The limit switch is arranged in the accommodating space and connected with the inner wall of the accommodating part. The movable member is arranged between the limit switch and the connecting part. The movable member can slide and contact with the limit switch to trigger the limit switch.

[0024] In some embodiments, the limit switch is connected to the regulating valve signal, and the moving member can generate a first signal when contacting the limit switch, and the regulating valve is closed based on the first signal.

[0025] In some embodiments, part of the accommodating portion protrudes outward to form a matching piece, the matching piece has the air inlet, and the connecting portion is disposed at the air inlet and is sealed and connected to the matching piece.

[0026] In some embodiments, a first anti-adsorption portion is disposed on the inner surface of the airbag, and the first anti-adsorption portion is used to prevent the airbag from adsorbing hydrogen sulfide.

[0027] Compared with the prior art, the present application provides a detection device for rapid detection of trace hydrogen sulfide, which uses an air bag as a sampling container. The regulating valve on the air bag can ensure that the gas in the air bag after sampling is in a sealed state, effectively preventing gas leakage during storage and detection after sampling, and significantly improving the accuracy of detection; both ends of the hydrogen sulfide detection tube are detachably and sealedly connected to the regulating valve and the volume measurement component through a connecting part, avoiding the two ends of the hydrogen sulfide detection tube from affecting the detection result due to poor sealing, ensuring the accuracy of the final detection result, and at the same time, the detachable design also realizes the reuse of the detection device and reduces the cost; during the detection process, a certain pressure is generated by squeezing the air bag, so that the gas can pass through the hydrogen sulfide detection tube and then enter the volume measurement component, that is, the volume measurement component measures the volume of gas passing through the hydrogen sulfide detection tube to achieve rapid detection of the hydrogen sulfide detection tube.

[0028] The present application discloses a detection device for rapidly detecting trace amounts of hydrogen sulfide. Both ends of a hydrogen sulfide detection tube are detachably sealedly connected to a regulating valve and a volume measurement component through a connecting portion, thereby ensuring the sealing of the connection during the measurement process, achieving precise control of the sampling volume, and improving the accuracy of the final detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present application will become easy to understand. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0030] Figure 1 The structure diagram of an embodiment of a detection device for rapid detection of trace hydrogen sulfide of the present application is schematically shown;

[0031] Figure 2 The structural diagram of another embodiment of a detection device for rapidly detecting trace hydrogen sulfide of the present application is schematically shown.

[0032] Explanation of the accompanying drawings: 1. air bag; 2. regulating valve; 3. connecting part; 4. hydrogen sulfide detection tube; 5. volume measurement component; 51. accommodating part; 52; moving part; 521. first sliding part; 522. first push rod; 53. first sub-moving part; 531. second push rod; 532. third sliding part; 54. second sub-moving part; 541. third push rod; 542. fourth sliding part; 55. matching part. DETAILED DESCRIPTION

[0033] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0034] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which this application belongs.

[0035] In order to facilitate the detection of hydrogen sulfide gas concentration in natural gas at the production site, the hydrogen sulfide detection tube 4 is currently used in conjunction with a syringe for detection. The hydrogen sulfide detection tube 4 is a portable chemical detection tool for rapid on-site detection of the concentration of hydrogen sulfide in the air. It includes an elongated glass tube filled with chemical reagents and indicators sensitive to hydrogen sulfide, and the concentration of hydrogen sulfide in the mixed gas is determined by chemical reaction. When the gas containing a preset volume of hydrogen sulfide passes through the hydrogen sulfide detection tube 4, the chemical reagent filled in the tube undergoes a specific chemical reaction with hydrogen sulfide, resulting in an obvious color change. This color change is proportional to the concentration of hydrogen sulfide, and the concentration of hydrogen sulfide can be directly determined by observing the color change. During the use of the hydrogen sulfide detection tube 4, it is necessary to ensure the volume passed into the hydrogen sulfide detection tube 4 to avoid affecting the final test results.

[0036] The inventors noticed that after sampling, the sampled gas in the syringe could not be in a sealed state, and during the measurement process, the syringe could not be inserted into the air inlet end of the hydrogen sulfide detection tube 4 to make the two sealedly connected, which affected the final detection result.

[0037] The present application discloses a detection device for rapidly detecting trace amounts of hydrogen sulfide. Both ends of a hydrogen sulfide detection tube 4 are detachably sealedly connected to a regulating valve 2 and a volume measurement assembly 5 through a connecting portion 3, thereby ensuring the sealing of the connection during the measurement process, achieving precise control of the sampling volume, and improving the accuracy of the final detection result.

[0038] like Figure 1As shown, the present application provides a detection device for quickly detecting trace hydrogen sulfide, comprising: an air bag 1, a regulating valve 2, a connecting part 3, a hydrogen sulfide detection tube 4 and a volume measurement component 5;

[0039] The air bag 1 has a vent; the regulating valve 2 is arranged at the vent and is sealed and connected to the air bag 1; the air inlet end of the hydrogen sulfide detection tube 4 is detachably and sealedly connected to the regulating valve 2 through the connecting part 3; the volume measuring component 5 is detachably and sealedly connected to the air outlet end of the hydrogen sulfide detection tube 4 through the connecting part 3, and the volume measuring component 5 is used to measure the volume of the gas passed into the hydrogen sulfide detection tube 4.

[0040] Specifically, the air bag 1 is used as a sampling gas container to collect natural gas containing hydrogen sulfide gas at a sampling point of a natural gas pipeline. The air bag 1 can be made of an aluminum-plastic composite film or a polyethylene terephthalate / polyethylene composite film, wherein an aluminum-plastic composite film with good gas isolation, chemical corrosion resistance and moderate mechanical strength is preferred. During the detection process, the user can squeeze the air bag to allow the gas in the air bag to enter the hydrogen sulfide detection tube 4 and the volume measurement component 5.

[0041] The regulating valve 2 can not only open and close the gas path between the air bag 1 and the hydrogen sulfide detection tube 4, but also accurately regulate the gas flow entering the hydrogen sulfide detection tube 4. The regulating valve 2 can be sealed and connected to the air bag 1 by hot melt welding, laser welding or bonding, and the size of the vent is adapted to the regulating valve 2.

[0042] The connecting part 3 is used to realize the detachable sealed connection between the two ends of the hydrogen sulfide detection tube 4 and the regulating valve 2 and the volume measurement component 5 respectively. The connecting part 3 may include two quick connectors, each of which includes a plug and a socket, and the air inlet of the regulating valve 2 and the volume measurement component 5 may be sealed and connected to a socket respectively. The two plugs may be snap-on plugs, and the outer sides of the two ends of the hydrogen sulfide detection tube 4 are respectively provided with snap-on interfaces matching the snap-on connectors, and the two ends of the hydrogen sulfide detection tube 4 are respectively snap-on connected with a plug through a snap-on interface, and the plug at the air inlet end of the hydrogen sulfide detection tube 4 is plugged into the socket on the regulating valve 2, and the plug at the air outlet end of the hydrogen sulfide detection tube 4 is plugged into the socket on the volume measurement part. Since the outside of the hydrogen sulfide detection tube 4 is a sealed slender glass tube, the two ends of the hydrogen sulfide detection tube 4 need to be broken off before use to expose the chemical reagent filled inside, so that the gas to be detected can contact and react with the reagent. Therefore, the two snap interfaces of the hydrogen sulfide detection tube 4 have a preset distance from the end face, so that after the two ends of the hydrogen sulfide detection tube 4 are broken off, the snap interfaces can be connected to the plug.

[0043] In addition, the connection portion 3 may also include a sealing tape, and the sealing tape is wrapped around the connection between the two quick connectors to enhance the sealing effect.

[0044] The hydrogen sulfide detection tube 4 is used to detect the concentration of hydrogen sulfide in the gas. The specific model of the hydrogen sulfide detection tube 4 can be appropriately selected according to the concentration range of hydrogen sulfide in the gas to be detected. The hydrogen sulfide detection tube 4 can be obtained through market procurement.

[0045] The volume measurement component 5 is used to measure the volume of gas entering the hydrogen sulfide detection tube 4 to achieve accurate detection of the hydrogen sulfide detection tube 4. The volume measurement component 5 can be a syringe, and the air inlet of the syringe can be sealed and connected to a socket. Before using the syringe, the piston rod can be wiped with silk to ensure that the piston rod is flexible.

[0046] To achieve a detachable sealed connection with the plug at the gas outlet end of the hydrogen sulfide detection tube 4.

[0047] Compared with the prior art, the present application provides a detection device for quickly detecting trace hydrogen sulfide, which uses an air bag 1 as a sampling container. The regulating valve 2 on the air bag 1 can ensure that the gas in the air bag 1 after sampling is in a sealed state, effectively preventing the gas from leaking during the storage and detection links after sampling, and significantly improving the accuracy of the detection; both ends of the hydrogen sulfide detection tube 4 are detachably and sealedly connected to the regulating valve 2 and the volume measurement component 5 through the connecting part 3, avoiding the two ends of the hydrogen sulfide detection tube 4 from affecting the detection result due to poor sealing, ensuring the accuracy of the final detection result, and at the same time, the detachable design also realizes the reuse of the detection device and reduces the cost; during the detection process, a certain pressure is generated by squeezing the air bag 1, so that the gas can pass through the hydrogen sulfide detection tube 4 and then pass into the volume measurement component 5, that is, the volume measurement component 5 measures the volume of gas passing through the hydrogen sulfide detection tube 4 to achieve rapid detection of the hydrogen sulfide detection tube 4.

[0048] The present application discloses a detection device for rapidly detecting trace amounts of hydrogen sulfide. Both ends of a hydrogen sulfide detection tube 4 are detachably sealedly connected to a regulating valve 2 and a volume measurement assembly 5 through a connecting portion 3, thereby ensuring the sealing of the connection during the measurement process, achieving precise control of the sampling volume, and improving the accuracy of the final detection result.

[0049] In order to reduce production costs and improve ease of use, such as Figure 1 As shown, in some embodiments, the connecting portion 3 includes:

[0050] Silicone tube, the regulating valve 2 is detachably and hermetically connected to the air inlet end via the silicone tube.

[0051] Specifically, the detection device of the present application may also include an air pipe, one end of which is sealed and connected to the air bag 1 at the vent; the regulating valve 2 is arranged on the air pipe. One end of the silicone tube can be sleeved on the other end of the air pipe and fixed by a clamp, etc., to ensure that the gas can only flow through the silicone tube without leakage; the other end of the silicone tube can be directly sleeved on the air inlet end and fit tightly with the air inlet end to achieve a detachable sealed connection with the air inlet end. Or,

[0052] The air outlet is detachably sealed and connected to the volume measuring component 5 through the silicone tube. When the volume measuring component 5 is a syringe, one end of the silicone tube can be sleeved on the needle tube of the syringe, and the two can be tightly connected by winding with a metal wire, and the other end of the silicone tube can be directly sleeved on the air outlet and tightly fit with the air outlet to achieve a detachable sealed connection with the air outlet. Or,

[0053] There can be two silicone tubes, one silicone tube is used to connect the regulating valve 2 and the air inlet end, and the other silicone tube is used to connect the air outlet end and the volume measurement component 5.

[0054] In some embodiments, a sealing thread (not shown in the figure) is provided on the outer side of the hydrogen sulfide detection tube 4, the regulating valve 2 has a first internal thread adapted to the sealing thread, and the volume measurement component 5 has a second internal thread adapted to the sealing thread, and the sealing thread, the first internal thread and the second internal thread together form the connecting part 3.

[0055] Specifically, the sealing thread can extend from the outside of the air inlet end of the hydrogen sulfide detection tube 4 to the outside of the air outlet end, or, the sealing thread can be set only on the outside of the air inlet end and the outside of the air outlet end of the hydrogen sulfide detection tube 4. At this time, the sealing thread should be ensured to have a certain length so that the two ends of the hydrogen sulfide detection tube 4 after breaking still have a certain distance of sealing threads to achieve threaded connection, which not only ensures the firm connection between the hydrogen sulfide detection tube 4 and the regulating valve 2 and the volume measurement component 5, but also ensures the airtightness of the gas transmission path.

[0056] like Figure 1 As shown, in some embodiments, the volume measurement component 5 includes:

[0057] The accommodating portion 51 has an accommodating space and an air inlet communicated with the accommodating space, and the air outlet is detachably and hermetically connected to the air inlet through the connecting portion 3;

[0058] The moving member 52 is disposed in the accommodating space, and the moving member 52 is sealingly and slidably connected to the inner wall of the accommodating portion 51 .

[0059] Specifically, the movable member 52 may include a first sliding member 521 and a first push rod 522. The first sliding member 521 is disposed between the air inlet and the push rod. The first sliding member 521 may be disposed entirely or partially in the accommodating space. The first sliding member 521 and the inner wall of the accommodating portion 51 may be sealed and slidably connected by a sealing ring or the like. The first sliding member 521 is fixedly connected to the first end of the first push rod 522. The accommodating space also has a through hole. The second end of the first push rod 522 extends out of the through hole so that the first sliding member 521 can be restored to its original position by the first push rod 522 after the detection is completed. For ease of operation, a handle may also be provided at the second end of the first push rod 522. Alternatively,

[0060] The movable member 52 may also include a spring and a second sliding member (not shown in the figure). The second sliding member is arranged between the air inlet and the spring. The second sliding member is entirely arranged in the accommodating space. The second sliding member and the inner wall of the accommodating portion 51 may be sealed and slidably connected via a sealing ring. The second sliding member is fixedly connected to the first end of the spring, and the second end of the spring is fixedly connected to the inner wall of the accommodating portion 51. The extension and contraction direction of the spring is the same as the sliding direction of the second movable member 52. The sliding of the second sliding member can compress the spring. After the detection is completed, the second sliding member can return to its original position under the action of the elastic force of the spring.

[0061] like Figure 1 As shown, in some embodiments, the accommodating portion 51 has a transparent area, and the transparent area is provided with a first scale (not shown in the figure), the first scale corresponds to the moving range of the movable member 52, and the movable member 52 and the first scale cooperate with each other to measure the volume of the gas passed into the accommodating portion 51.

[0062] Specifically, the accommodating portion 51 may be entirely transparent so that the position change of the internal moving key can be directly observed. For example, the accommodating portion 51 may be made of a transparent glass material or a transparent plastic material.

[0063] The first scale corresponds to the moving range of the first sliding member 521 / the second sliding member. The identification numbers of the first scale are arranged along the sliding direction of the first sliding member 521 / the second sliding member.

[0064] like Figure 2 As shown, in some embodiments, the moving member 52 includes a first sub-moving member 53 and a second sub-moving member 54 connected to each other, and the first sub-moving member 53 and the second sub-moving member 54 are both arranged in the accommodating space and are sealed and slidably connected to the interior of the accommodating portion 51; the first sub-moving member 53 is arranged between the second sub-moving member 54 and the connecting portion 3, and the cross-sectional area of ​​the first sub-moving member 53 is greater than the cross-sectional area of ​​the second sub-moving member 54;

[0065] The first scale includes a first sub-scale and a second sub-scale (not shown in the figure), the first sub-scale corresponds to the moving range of the first sub-moving member 53, the second sub-scale corresponds to the moving range of the second sub-moving member 54, and the accuracy of the second sub-scale is greater than the accuracy of the first sub-scale.

[0066] Specifically, the accommodating space may include a first sub-accommodating space and a second sub-accommodating space that are connected to each other, and the first sub-accommodating space is close to the air inlet of the accommodating portion relative to the second sub-accommodating space. The first sub-moving member 53 may include a second push rod 531 and a third sliding member 532, and the second sub-moving member 54 may include a third push rod 541 and a fourth sliding member 542. The third sliding member 532 is arranged in the first sub-accommodating space and is connected to the inner wall sealing and sliding of the accommodating portion 51, and the fourth sliding member 542 is arranged in the second sub-accommodating space and is connected to the inner wall sealing and sliding of the accommodating portion 51, and the third sliding member 532 and the fourth sliding member 542 are fixedly connected by the second push rod 531, and the second sub-accommodating space has a through hole, and one end of the second push rod 531 is fixedly connected to the fourth sliding member 542, and the other end stretches out of the through hole.

[0067] The identification numbers of the first sub-scale are arranged along the sliding direction of the third sliding member 532 , and the identification numbers of the second sub-scale are arranged along the sliding direction of the fourth sliding member 542 .

[0068] When the air bag 1 is squeezed, the third sliding member 532 and the fourth sliding member 542 slide synchronously due to the gas pressure, and the user can quickly and roughly read the volume of the gas through the first sub-scale and the third sliding member 532. As the gas pressure further increases to approach the preset volume, the flow rate of the regulating valve 2 can be reduced, and the volume of the gas can be accurately read through the second sub-scale and the fourth sliding member 542 to obtain more accurate gas volume data and ensure the final detection result.

[0069] In some embodiments, the measuring component further comprises:

[0070] A limit switch (not shown) is arranged in the accommodating space and connected to the inner wall of the accommodating portion 51. The movable member 52 is arranged between the limit switch and the connecting portion 3. The movable member 52 can slide and contact the limit switch to trigger the limit switch.

[0071] Specifically, the limit switch can be connected to the inner wall of the accommodating portion 51 by embedding or pasting. The limit switch can be a mechanical limit switch, a magnetic induction limit switch, etc. The moving part 52 needs to match the limit switch to achieve the triggering function. The limit switch can be purchased from the market.

[0072] A detection device for quickly detecting trace hydrogen sulfide in the present application may also include an audible and visual alarm. When the moving part 52 triggers the limit switch, the audible and visual alarm sends out an audible and visual signal to prompt the user to stop squeezing the air bag 1 to simplify the operation.

[0073] In order to further ensure the accuracy of the volume, in some embodiments, the limit switch is connected to the control valve 2 signal, the moving member 52 contacts the limit switch to generate a first signal, and the control valve 2 is closed based on the first signal.

[0074] Specifically, the regulating valve 2 can be a solenoid valve or an intelligent regulating valve. Through the linkage between the limit switch and the regulating valve 2, it is possible to effectively prevent excessive gas injection. When the preset gas volume is reached, the regulating valve 2 quickly closes the regulating valve 2, avoiding overfilling due to improper operation or failure to timely determine the gas injection amount, thereby ensuring the accuracy of the final test result.

[0075] like Figure 1 and Figure 2 As shown, in some embodiments, part of the accommodating portion 51 protrudes outward to form a fitting piece 55 , and the fitting piece 55 has the air inlet. The connecting portion 3 is disposed at the air inlet and is sealed and connected to the fitting piece 55 .

[0076] Specifically, the provision of the fitting 55 enables the connecting portion 3 to be directly installed at the air inlet of the accommodating portion 51 without the need for additional transition components or complicated assembly steps, thereby simplifying the assembly process of the overall device, reducing assembly difficulty and time cost, and improving production efficiency.

[0077] In order to reduce the adsorption of hydrogen sulfide gas by the airbag 1 and extend the service life of the airbag 1, in some embodiments, a first anti-adsorption portion (not shown in the figure) is provided on the inner surface of the airbag 1, and the first anti-adsorption portion is used to prevent the airbag 1 from adsorbing hydrogen sulfide.

[0078] Specifically, a special coating with anti-hydrogen sulfide adsorption performance can be set in the airbag 1 to form a first anti-adsorption part. The coating can be made of materials such as Teflon, silicone rubber, and polyetheretherketone. These materials have good chemical stability and low adsorption tendency for hydrogen sulfide, which can effectively reduce the adsorption of hydrogen sulfide on the inner wall of the airbag 1. In addition, when the connecting part 3 is a silicone tube, a second anti-adsorption part can also be set in the silicone tube to prevent the silicone tube from adsorbing hydrogen sulfide. The selection of the second anti-adsorption part can refer to the first anti-adsorption part. The material of the second anti-adsorption part can be the same as that of the first anti-adsorption part to maintain consistent anti-adsorption performance, and other suitable anti-hydrogen sulfide materials can also be selected according to the specific requirements and conditions of the silicone tube.

[0079] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A detection device for rapid detection of trace hydrogen sulfide, characterized in that: include: An air bag having a vent; A regulating valve, arranged at the vent and sealedly connected to the air bag; Connecting part; A hydrogen sulfide detection tube, the air inlet end of which is detachably and hermetically connected to the regulating valve via the connecting portion; A volume measuring component is detachably and hermetically connected to the gas outlet end of the hydrogen sulfide detection tube through the connecting portion, and the volume measuring component is used to measure the volume of the gas passed into the hydrogen sulfide detection tube.

2. The detection device for rapid detection of trace hydrogen sulfide according to claim 1, characterized in that: The connecting portion comprises: Silicone tube, the regulating valve is detachably and hermetically connected to the air inlet end through the silicone tube; and / or the air outlet end is detachably and hermetically connected to the volume measurement component through the silicone tube.

3. The detection device for rapid detection of trace hydrogen sulfide according to claim 1, characterized in that: The outer side of the hydrogen sulfide detection tube is provided with a sealing thread, the regulating valve has a first internal thread adapted to the sealing thread, the volume measurement component has a second internal thread adapted to the sealing thread, and the sealing thread, the first internal thread and the second internal thread together form the connecting portion.

4. The detection device for rapid detection of trace hydrogen sulfide according to claim 1, characterized in that: The volume measurement assembly comprises: The accommodating portion comprises an accommodating space and an air inlet communicated with the accommodating space, wherein the air outlet is detachably and hermetically connected to the air inlet via the connecting portion; The moving part is arranged in the accommodating space, and the moving part is sealingly and slidably connected with the inner wall of the accommodating part.

5. The detection device for rapid detection of trace hydrogen sulfide according to claim 4, characterized in that: The accommodating portion has a transparent area, the transparent area is provided with a first scale, the first scale corresponds to the moving range of the moving member, and the moving member and the first scale cooperate with each other to measure the volume of the gas introduced into the accommodating portion.

6. The detection device for rapid detection of trace hydrogen sulfide according to claim 5, characterized in that: The moving member includes a first sub-moving member and a second sub-moving member connected to each other, wherein the first sub-moving member and the second sub-moving member are both arranged in the accommodating space and are sealed and slidably connected to the interior of the accommodating portion; the first sub-moving member is arranged between the second sub-moving member and the connecting portion, and the cross-sectional area of ​​the first sub-moving member is greater than the cross-sectional area of ​​the second sub-moving member; The first scale includes a first sub-scale and a second sub-scale, the first sub-scale corresponds to the moving range of the first sub-moving member, the second sub-scale corresponds to the moving range of the second sub-moving member, and the accuracy of the second sub-scale is greater than the accuracy of the first sub-scale.

7. The detection device for rapid detection of trace hydrogen sulfide according to claim 4, characterized in that: The measuring component also includes: The limit switch is arranged in the accommodating space and connected with the inner wall of the accommodating part. The movable member is arranged between the limit switch and the connecting part. The movable member can slide and contact with the limit switch to trigger the limit switch.

8. The detection device for rapid detection of trace hydrogen sulfide according to claim 7, characterized in that: The limit switch is connected to the regulating valve signal. When the moving member contacts the limit switch, a first signal can be generated. The regulating valve is closed based on the first signal.

9. The detection device for rapid detection of trace hydrogen sulfide according to claim 4, characterized in that: A portion of the accommodating portion protrudes outward to form a matching piece, the matching piece has the air inlet, and the connecting portion is arranged at the air inlet and is sealed and connected to the matching piece.

10. The detection device for rapid detection of trace hydrogen sulfide according to any one of claims 1 to 9, characterized in that: A first anti-adsorption portion is provided on the inner surface of the air bag, and the first anti-adsorption portion is used to prevent the air bag from adsorbing hydrogen sulfide.

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