Detection device for sulfide in natural gas

Abstract

The utility model discloses a device for detecting sulfides in natural gas, which comprises a detection connecting assembly arranged on a natural gas pipeline, a joint of the detection connecting assembly is hermetically connected with the natural gas pipeline, the detection connecting assembly is communicated with the natural gas pipeline, and the detection connecting assembly is used for transmitting the natural gas in the natural gas pipeline for detection; the sealing ventilation assembly is arranged on the detection connection assembly, is in sealing connection with the detection connection assembly and is used for determining whether the natural gas passes through the detection connection assembly to be detected in the next step or not; the filtering assembly is arranged on the detection connecting assembly and is used for filtering impurities in the natural gas; and the sulfide detector is communicated with the detection connecting assembly. According to the detection device for the sulfide in the natural gas, the two groups of sealed ventilation assemblies are arranged, so that two detection modes for the sulfide in the natural gas in a non-flowing state and a flowing state can be realized, and the detection device is suitable for various detection conditions.

Description

Technical Field

[0001] This utility model relates to the field of natural gas detection technology, and in particular to a device for detecting sulfides in natural gas. Background Technology

[0002] Natural gas is a mixture of gases mainly composed of methane (CH4). It is a combustible gas resource formed underground and usually exists in underground oil and gas fields along with oil. Natural gas is a clean and energy-efficient energy source, widely used in heating, power generation, industrial production, and transportation. When using natural gas, in order to avoid safety hazards caused by excessive levels of sulfides, it is necessary to test the sulfides in natural gas.

[0003] Sulfides in gases are mainly inorganic sulfur compounds (H2S, SO2, SF6) and organic sulfur compounds (COS, CS2, thiols, thioethers, thiophenes). Sulfides in industrial gases can poison catalysts and are also the main substances that cause material corrosion. Therefore, the analysis of sulfides in gases is very important in production and daily life and is an indicator that must be controlled in workplaces and living areas.

[0004] Existing methods for detecting sulfides in natural gas include chemical analysis and electrochemical methods. These methods involve testing during natural gas transportation, which is always in a flowing state, making it impossible to perform tests while the gas is still flowing. Furthermore, the interfaces between main and branch pipelines contain a lot of impurities that accumulate on the detector, which can seriously affect the lifespan of the sulfide detector and the accuracy of the test. Utility Model Content

[0005] The purpose of this invention is to provide a device for detecting sulfides in natural gas, in order to solve one or more of the above-mentioned problems.

[0006] To achieve the above objectives, this utility model provides a device for detecting sulfides in natural gas, comprising:

[0007] A detection connection component is installed on a natural gas pipeline, with its interface sealed to and connected to the natural gas pipeline, for transmitting natural gas in the natural gas pipeline for detection.

[0008] A sealed venting assembly is disposed on the detection connection assembly and is sealed to the detection connection assembly, used to determine whether natural gas passes through the detection connection assembly for further detection;

[0009] A filter assembly, disposed on the detection connection assembly, is used to filter impurities in natural gas;

[0010] A sulfide detector is connected to the detection connection assembly, and the sealing and ventilation assembly determines whether natural gas can pass through the detection connection assembly into the sulfide detector for detection.

[0011] Preferably, in the above-mentioned device for detecting sulfides in natural gas, the detection connection assembly includes:

[0012] A connecting main pipe is installed on the natural gas pipeline, and its two ends are sealed to the natural gas pipeline through connecting flanges. The connecting main pipe is provided with a vent hole one and a vent hole two.

[0013] A connecting branch pipe is provided, with one end of which is sealed and connected to the air vent, and communicates with the main connecting pipe.

[0014] Connecting branch pipe two, one end of which is sealed and connected to the air hole two, and communicates with the connecting main pipe;

[0015] A three-way connector, wherein two of its ports are respectively connected to the other ends of connecting branch pipe one and connecting branch pipe two;

[0016] Connect branch pipe three, one end of which is connected to the remaining interface of the tee connector, and the other end is connected to the sulfide detector.

[0017] Preferably, in the above-mentioned device for detecting sulfides in natural gas, the sealing and venting assembly includes:

[0018] A sliding plate is disposed within the connecting main pipe, and a sliding groove is provided within the connecting main pipe. The two sides of the sliding plate are disposed within the sliding groove, and a through groove is provided in the middle of the sliding plate. A transmission tooth is provided at one end of the through groove.

[0019] A sealing arc plate is disposed at one end of the sliding plate and is fixedly connected to the sliding plate. Its arc matches the inner arc surface of the connecting main tube and contacts the inside of the connecting main tube. A sealing gasket is provided on the side of the sealing arc plate that contacts the connecting main tube.

[0020] A rotating gear is disposed in the through groove of the sliding plate and meshes with the transmission gear on the sliding plate;

[0021] A rotating rod has one end fixedly connected to the rotating gear, and the other end extends through the wall of the connecting main pipe to the outside of the connecting main pipe, and is rotatably and sealingly connected to the connecting main pipe. A handle is provided on the rotating rod.

[0022] Preferably, in the above-mentioned detection device for sulfides in natural gas, the sealing and venting assembly is provided in two sets, and the sealing arc plates of the two sets of sealing and venting assemblies are respectively provided for the first vent and the second vent, so as to seal the first vent and the second vent respectively.

[0023] Preferably, in the above-mentioned device for detecting sulfides in natural gas, the filter assembly includes:

[0024] A filter screen is installed inside the connecting branch pipe three, which has an opening, and the filter screen is inserted inside the connecting branch pipe three.

[0025] The collection frame is set inside the connecting branch pipe three and is fixedly connected to the filter screen.

[0026] Preferably, in the above-mentioned detection device for sulfides in natural gas, a sealing gasket is provided on the side where the filter screen and the collection frame are connected to the opening of the connecting branch pipe three, so as to achieve a sealed connection with the connecting branch pipe three.

[0027] Therefore, this utility model provides a natural gas sulfide detection device with the above-mentioned structure, equipped with two sets of sealed ventilation components. When both sets of sealed ventilation components are open, the flow state of natural gas is detected. When one set is opened and then closed, some natural gas enters the sulfide detection component to achieve detection in a non-flowing state. This allows for the determination of whether the natural gas entering the sulfide detector is in a flowing state, enabling the detection of sulfides in natural gas in both non-flowing and flowing states. It is suitable for various detection situations. Furthermore, a filter component is provided to filter impurities in the natural gas entering the sulfide detector, solving the problem that a large amount of impurities in the pipeline accumulate on the detector, which seriously affects the lifespan and accuracy of the sulfide detector. The filter component can be removed to replace the filter screen, and the filtered impurities fall into the collection frame and do not remain in the pipeline, thus enabling the cleaning of impurities.

[0028] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the device for detecting sulfides in natural gas according to this utility model;

[0030] Figure 2 This is a cross-sectional view of an embodiment of the device for detecting sulfides in natural gas according to the present invention;

[0031] Figure 3 This is a top cross-sectional view of the sealing and ventilation assembly of an embodiment of the detection device for sulfides in natural gas according to this utility model;

[0032] Figure 4 This is an embodiment of a device for detecting sulfides in natural gas according to the present invention. Figure 2 A schematic diagram of the filter component at point a. Detailed Implementation

[0033] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0034] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0035] See Figure 1-4 As shown, this application provides a device for detecting sulfides in natural gas, comprising:

[0036] The detection connection component 2 is installed on the natural gas pipeline 1, and its interface is sealed to the natural gas pipeline 1 and communicates with the natural gas pipeline 1 for transmitting natural gas in the natural gas pipeline 1 for detection.

[0037] A sealing and venting assembly 3 is disposed on the detection connection assembly 2 and is sealed to the detection connection assembly 2, and is used to determine whether natural gas passes through the detection connection assembly 2 for further detection;

[0038] Filter component 4 is disposed on the detection connection component 2 and is used to filter impurities in natural gas;

[0039] The sulfide detector 5 is connected to the detection connection assembly 2, and the sealing and ventilation assembly 3 determines whether natural gas can pass through the detection connection assembly 2 to enter the sulfide detector 5 for detection.

[0040] To further optimize the above technical solution, the detection connection component 2 includes:

[0041] A connecting main pipe 21 is installed on the natural gas pipeline 1, and its two ends are sealed to the natural gas pipeline 1 through connecting flanges. The connecting main pipe 21 is provided with a vent hole one and a vent hole two.

[0042] Connecting branch pipe 22, one end of which is sealed and connected to the air hole 1, and communicates with the connecting main pipe 21;

[0043] Connecting branch pipe 23, one end of which is sealed and connected to the air hole 2, and communicates with the connecting main pipe 21;

[0044] The three-way connector 24 has two ports that are respectively connected to the other end of the first connecting branch pipe 22 and the second connecting branch pipe 23;

[0045] Connecting branch pipe 25, one end of which is connected to the remaining interface of the tee connector 24, and the other end is connected to the sulfide detector 5.

[0046] It should be noted that the sealing and venting assembly 3 is located inside the connecting main pipe 21, and the filter assembly is located inside the connecting branch pipe 25. The sealing and venting assembly 3 can determine whether natural gas enters the sulfide detector 5, and the filter assembly 4 is located inside the connecting branch pipe 25 connected to the sulfide detector 5 to filter the natural gas entering the sulfide detector 5.

[0047] To further optimize the above technical solution, the sealing and venting assembly 3 includes:

[0048] A sliding plate 31 is disposed inside the connecting main pipe 21. A sliding groove is disposed inside the connecting main pipe 21. The two sides of the sliding plate 31 are disposed inside the sliding groove. A through groove is disposed in the middle of the sliding plate 31. A transmission tooth is disposed at one end of the through groove.

[0049] A sealing arc plate 32 is disposed at one end of the sliding plate 31 and is fixedly connected to the sliding plate 31. Its arc matches the inner arc surface of the connecting main tube 21 and contacts the inside of the connecting main tube 21. A sealing gasket is provided on the side of the sealing arc plate 32 that contacts the connecting main tube 21.

[0050] Rotating gear 33 is disposed in the through groove of the sliding plate 31 and meshes with the transmission gear on the sliding plate 31;

[0051] The rotating rod 34 has one end fixedly connected to the rotating gear 33, and the other end extends through the wall of the connecting main pipe 21 to the outside of the connecting main pipe 21 and is rotatably connected to the connecting main pipe 21 in a sealed manner. A handle is provided on the rotating rod 34.

[0052] The sealing and venting assembly 3 is provided in two sets. The sealing arc plate 32 of the two sets of sealing and venting assemblies 3 are respectively provided for the first air hole and the second air hole, and respectively seal the first air hole and the second air hole.

[0053] Specifically, under normal conditions, the sealing arc plate 32 is located on the first and second air holes, sealing the air holes and ensuring the normal flow of natural gas between the main pipe 21 and the natural gas pipeline 1. When testing is required, the sealing arc plate 32 is opened as needed to allow natural gas to enter the detector.

[0054] To further optimize the above technical solution, the filter component 4 includes:

[0055] A filter screen 41 is disposed inside the connecting branch pipe 25, which has an opening, and the filter screen 41 is inserted into the connecting branch pipe 25.

[0056] The collection frame 42 is set inside the connecting branch pipe 25 and is fixedly connected to the filter screen 41.

[0057] To further optimize the above technical solution, a sealing gasket is provided on the side of the filter screen 41 and the collection frame 42 that connects to the opening of the connecting branch pipe 25, so as to achieve a sealed connection with the connecting branch pipe 25.

[0058] Working Principle: When it is necessary to detect sulfides in the natural gas in natural gas pipeline 1, the detection method is determined. For detection in a non-flowing state, firstly, vent one is opened, and the rotating rod 34 corresponding to vent one is rotated. The rotating rod 34 drives the rotating gear 33 to rotate, which in turn drives the sliding plate 31 to slide. The sealing arc plate 32, driven by the sliding plate 31, moves away from vent one, connecting branch pipe one 22 and connecting main pipe 21. Natural gas enters the sulfide detector through connecting branch pipe one 22 and connecting branch pipe three 25. When the gas volume is sufficient, the rotating rod 34 is rotated, causing the sliding plate 31 to drive the sealing arc plate 32 back to its original position. This allows for detection of the natural gas in the natural gas pipeline 1 in a non-flowing state. When the natural gas passes through connecting branch pipe three 25, it passes through the filter screen 41 to filter impurities. For detection in a flowing state, firstly, vent one is opened, and the rotating rod 34 corresponding to vent one is rotated. The rotating rod 34 drives the rotating... Gear 33 rotates, causing sliding plate 31 to slide. Sealing arc plate 32 moves away from air hole one under the action of sliding plate 31, connecting branch pipe 1 22 to connecting main pipe 21. Air hole two is opened, and rotating rod 34 corresponding to air hole two is rotated. Rotating rod 34 drives rotating gear 33 to rotate, causing sliding plate 31 to slide. Sealing arc plate 32 moves away from air hole two under the action of sliding plate 31, connecting branch pipe 2 23 to connecting main pipe 21. Natural gas enters sulfide detector 5 through connecting branch pipe 1 22 and connecting branch pipe 3 25, and can return to connecting main pipe 21 through connecting branch pipe 2 23. It can detect the flow state of natural gas in the natural gas pipeline. When natural gas passes through connecting branch pipe 3 25, it passes through filter screen 41 to filter impurities in the natural gas. After a period of testing and use, the impurities in the collection frame 42 of filter assembly 4 can be removed, and filter screen 41 can be replaced as needed.

[0059] Therefore, this utility model provides a natural gas sulfide detection device with the above-mentioned structure, equipped with two sets of sealed ventilation components. When both sets of sealed ventilation components are open, the flow state of natural gas is detected. When one set is opened and then closed, some natural gas enters the sulfide detection component to achieve detection in a non-flowing state. This allows for the determination of whether the natural gas entering the sulfide detector is in a flowing state, enabling the detection of sulfides in natural gas in both non-flowing and flowing states. It is suitable for various detection situations. Furthermore, a filter component is provided to filter impurities in the natural gas entering the sulfide detector, solving the problem that a large amount of impurities in the pipeline accumulate on the detector, which seriously affects the lifespan and accuracy of the sulfide detector. The filter component can be removed to replace the filter screen, and the filtered impurities fall into the collection frame and do not remain in the pipeline, thus enabling the cleaning of impurities.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A device for detecting sulfides in natural gas, characterized in that, include: A detection connection component is installed on a natural gas pipeline, with its interface sealed to and connected to the natural gas pipeline, for transmitting natural gas in the natural gas pipeline for detection. A sealed venting assembly is disposed on the detection connection assembly and is sealed to the detection connection assembly, used to determine whether natural gas passes through the detection connection assembly for further detection; A filter assembly, disposed on the detection connection assembly, is used to filter impurities in natural gas; A sulfide detector is connected to the detection connection assembly, and the sealing and ventilation assembly determines whether natural gas can pass through the detection connection assembly into the sulfide detector for detection.

2. The device for detecting sulfides in natural gas according to claim 1, characterized in that, The detection connection component includes: A connecting main pipe is installed on the natural gas pipeline, and its two ends are sealed to the natural gas pipeline through connecting flanges. The connecting main pipe is provided with a vent hole one and a vent hole two. A connecting branch pipe is provided, with one end of which is sealed and connected to the air vent, and communicates with the main connecting pipe. Connecting branch pipe two, one end of which is sealed and connected to the air hole two, and communicates with the connecting main pipe; A three-way connector, wherein two of its ports are respectively connected to the other ends of connecting branch pipe one and connecting branch pipe two; Connect branch pipe three, one end of which is connected to the remaining interface of the tee connector, and the other end is connected to the sulfide detector.

3. The device for detecting sulfides in natural gas according to claim 2, characterized in that, The sealing and venting assembly includes: A sliding plate is disposed within the connecting main pipe, and a sliding groove is provided within the connecting main pipe. The two sides of the sliding plate are disposed within the sliding groove, and a through groove is provided in the middle of the sliding plate. A transmission tooth is provided at one end of the through groove. A sealing arc plate is disposed at one end of the sliding plate and is fixedly connected to the sliding plate. Its arc matches the inner arc surface of the connecting main tube and contacts the inside of the connecting main tube. A sealing gasket is provided on the side of the sealing arc plate that contacts the connecting main tube. A rotating gear is disposed in the through groove of the sliding plate and meshes with the transmission gear on the sliding plate; A rotating rod has one end fixedly connected to the rotating gear, and the other end extends through the wall of the connecting main pipe to the outside of the connecting main pipe, and is rotatably and sealingly connected to the connecting main pipe. A handle is provided on the rotating rod.

4. The device for detecting sulfides in natural gas according to claim 3, characterized in that, The sealing and venting assembly is provided in two sets. The sealing arc plates of the two sets of sealing and venting assemblies are respectively provided for the first air hole and the second air hole, so as to seal the first air hole and the second air hole respectively.

5. The device for detecting sulfides in natural gas according to claim 4, characterized in that, The filtering component includes: A filter screen is installed inside the connecting branch pipe three, which has an opening, and the filter screen is inserted inside the connecting branch pipe three. The collection frame is set inside the connecting branch pipe three and is fixedly connected to the filter screen.

6. The device for detecting sulfides in natural gas according to claim 5, characterized in that, A sealing gasket is provided on the side where the filter screen and the collection frame are connected to the opening of the connecting branch pipe three, so as to achieve a sealed connection with the connecting branch pipe three.

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