Non-methane total hydrocarbon detection device
By introducing clean gas from a high-pressure gas cylinder into the gas chromatograph to flush away residual gas, the problem of decreased detection efficiency of the gas chromatograph was solved, and more efficient detection of non-methane total hydrocarbons was achieved.
Patent Information
- Application Number
- CN202520562719.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-03-06
- Estimated Expiration
- 2035-03-28
AI Technical Summary
Existing gas chromatographs are prone to leaving residual analytes after continuous use in a short period of time, which leads to a decrease in detection efficiency.
A non-methane total hydrocarbon detection device was designed, comprising a gas chromatograph, an inlet pipe, an outlet pipe, a connecting pipe, and a high-pressure gas tank. By using an adjustment mechanism and a rotating rod, the clean gas in the high-pressure gas tank is used to flush the inside of the gas chromatograph and remove residual gas.
This improves the detection performance of the gas chromatograph and ensures the accuracy and precision of the detection.
Smart Images
Figure CN223977187U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of environmental protection technology, specifically to a non-methane total hydrocarbon detection device. Background Technology
[0002] With the rapid development of industrialization and urbanization, the emission of volatile organic compounds (VOCs) in the environment has become increasingly prominent. Among them, non-methane hydrocarbons (NMHC), as an important component of VOCs, pose a serious threat to air quality and human health. In order to effectively control NMHC emissions, accurate and rapid detection of its concentration is particularly important.
[0003] Gas chromatography is currently the commonly used method for detecting the content of non-methane total hydrocarbons (NMHC), which can achieve high sensitivity and high precision measurement of NMHC in the environment. Through sampling, separation and detection, it can accurately reflect the real-time concentration of NMHC in the environment, providing strong support for environmental monitoring and industrial production process control.
[0004] Currently, gas chromatographs are widely used in many industries such as petrochemicals, chemicals, coatings, and printing, becoming an indispensable tool in environmental supervision and industrial production. However, continuous use within a short period of time can leave residues from the previous test in the gas chromatograph, reducing the detection effect.
[0005] Therefore, in order to address the above problems, the applicant needs to design a non-methane total hydrocarbon detection device to solve the problem. Utility Model Content
[0006] The purpose of this invention is to provide a non-methane total hydrocarbon detection device to solve the problems mentioned in the background section.
[0007] To achieve the above objectives, this utility model provides the following technical solution: a non-methane total hydrocarbon detection device, comprising a gas chromatograph, wherein an inlet pipe and an outlet pipe are fixedly connected to the gas chromatograph.
[0008] It also includes: a connecting pipe that connects to the air intake pipe, and the connecting pipe introduces clean gas into the gas chromatograph;
[0009] An adjustment mechanism is installed inside the intake duct, and the adjustment mechanism is used to open or close the intake duct and the connecting duct. The adjustment mechanism includes a hollow groove, which is fixedly connected to the intake duct. A rotating rod is installed inside the hollow groove, and the rotating rod is divided into a smooth area and a threaded area. A control component is threaded on the threaded area. The control component includes a moving block, and the moving block is used to close or open the connecting duct. A telescopic rod is fixedly installed on one side of the moving block, and a mounting plate that is threadedly connected to the threaded area is fixedly installed at the end of the telescopic rod away from the moving block. A sealing plate is fixedly installed on the mounting plate, and the sealing plate is used to open or close the intake duct.
[0010] Furthermore, the end of the connecting pipe away from the air inlet pipe is connected to a high-pressure gas tank, and a delivery pipe is fixedly connected to the high-pressure gas tank, and the delivery pipe delivers clean gas into the high-pressure gas tank.
[0011] Through the above structural design, clean gas can be easily introduced into the high-pressure gas tank via the delivery pipeline. After the clean gas from the high-pressure gas tank enters the gas chromatograph through the inlet pipeline, it will flush out the residual gas inside the instrument and improve the detection effect.
[0012] Furthermore, a stabilizing seat is rotatably provided on one side of the rotating rod, and a fixing rod is fixedly provided on the outer side of the stabilizing seat, with the end of the fixing rod away from the stabilizing seat being fixedly connected to the connecting pipe.
[0013] Through the above structural design, the fixed rod facilitates the support of the stable base, and the stable base facilitates the support of the rotating rod, thereby improving the stability and stability of the rotating rod during rotation.
[0014] Furthermore, the end of the rotating rod away from the stable base slides through the air intake pipe and is fixedly equipped with a rotating handle.
[0015] The above structural design allows for easy and effortless rotation of the rotating rod using a rotary handle.
[0016] Furthermore, a guide slide rod is fixedly installed on the stabilizing base, and the end of the guide slide rod away from the stabilizing base passes through the moving block and the mounting plate and is fixedly connected to the hollow groove.
[0017] The above structural design facilitates the directional movement of the moving block and the mounting plate by using guide slide rods.
[0018] Furthermore, a base is fixedly installed on the bottom surface of the high-pressure gas tank, and the base is fixedly connected to the gas chromatograph.
[0019] The above structural design allows for easy support of the high-pressure gas cylinder by utilizing the base, thereby improving the load-bearing capacity and stability of the high-pressure gas cylinder.
[0020] Compared with the prior art, the beneficial effects of this utility model are: the non-methane total hydrocarbon detection device facilitates the detection of non-methane total hydrocarbon content using a gas chromatograph, and it facilitates the flushing of residual gas in the gas chromatograph before detection, thereby improving the detection effect. The specific details are as follows:
[0021] When using this non-methane total hydrocarbon detection device, to detect gas using a gas chromatograph, the handle is rotated by external force. The rotation of the handle drives the rotating rod, which, under the action of the guide slide, causes the moving block and mounting plate to move in a specific direction. The movement of the mounting plate causes the sealing plate to move. When the sealing plate moves to close the inlet pipe, the gas to be detected is introduced into the inlet pipe. Simultaneously, the handle is continued to rotate, and the mounting plate will be in the smooth zone. At this time, the moving block continues to move in the threaded zone. When the moving block disengages from the connecting pipe, clean gas from the high-pressure gas tank enters the gas chromatograph, flushing out residual gas inside the instrument and thus improving the detection effect of the gas chromatograph. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;
[0023] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A;
[0024] Figure 3 This is a three-dimensional structural diagram of the adjustment mechanism of this utility model;
[0025] Figure 4 This is a schematic diagram of the connection structure between the movable block and the mounting plate of this utility model.
[0026] In the diagram: 1. Gas chromatograph; 2. Adjustment mechanism; 10. Inlet pipe; 11. Outlet pipe; 12. Connecting pipe; 13. High-pressure gas tank; 14. Delivery pipe; 15. Base; 20. Hollow groove; 21. Smooth area; 22. Threaded area; 23. Control components; 24. Stabilizing base; 25. Fixing rod; 26. Guide slide rod; 27. Rotating handle; 230. Moving block; 231. Telescopic rod; 232. Mounting plate; 233. Sealing plate. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] like Figures 1-4As shown, this utility model discloses a non-methane total hydrocarbon detection device, including a gas chromatograph 1, with an inlet pipe 10 and an outlet pipe 11 fixedly connected to the gas chromatograph 1. It also includes a connecting pipe 12 connected to the inlet pipe 10, through which clean gas is introduced into the gas chromatograph 1; and an adjusting mechanism 2 disposed inside the inlet pipe 10, used to open or close the inlet pipe 10 and the connecting pipe 12. The adjusting mechanism 2 includes a hollow groove 20, which is fixedly connected to the inlet pipe 10. The device is equipped with a rotating rod, which is divided into a smooth area 21 and a threaded area 22. A control component 23 is threaded on the threaded area 22. The control component 23 includes a moving block 230, which is used to close or open the connecting pipe 12. A telescopic rod 231 is fixedly installed on one side of the moving block 230. A mounting plate 232 that is threadedly connected to the threaded area 22 is fixedly installed on the end of the telescopic rod 231 away from the moving block 230. A sealing plate 233 is fixedly installed on the mounting plate 232, which is used to open or close the air intake pipe 10.
[0029] The end of the connecting pipe 12 furthest from the inlet pipe 10 is connected to a high-pressure gas tank 13. A delivery pipe 14 is fixedly connected to the high-pressure gas tank 13, and the delivery pipe 14 delivers clean gas into the high-pressure gas tank 13. The delivery pipe 14 facilitates the input of clean gas into the high-pressure gas tank 13. After the clean gas from the high-pressure gas tank 13 enters the gas chromatograph 1 through the inlet pipe 10, it flushes the residual gas inside the instrument, improving the detection effect. A stabilizing base 24 is rotatably mounted on one side of the rotating rod. A fixing rod 25 is fixedly mounted on the outside of the stabilizing base 24, and the end of the fixing rod 25 furthest from the stabilizing base 24 is fixedly connected to the connecting pipe 12. The fixing rod 25 facilitates the support of the stabilizing base 24, and the stabilizing base 24 facilitates the support of the rotating rod. This improves the stability and stability of the rotating rod during rotation. The end of the rotating rod away from the stable base 24 slides through the air inlet pipe 10 and is fixedly equipped with a rotating handle 27. The rotating handle 27 facilitates the rotation of the rotating rod with minimal effort. A guide slide rod 26 is fixedly installed on the stable base 24, and the end of the guide slide rod away from the stable base 24 passes through the moving block 230 and the mounting plate 232 and is fixedly connected to the hollow groove 20. The guide slide rod 26 facilitates the directional movement of the moving block 230 and the mounting plate 232. A base 15 is fixedly installed on the bottom surface of the high-pressure gas tank 13 and is fixedly connected to the gas chromatograph 1. The base 15 facilitates the support of the high-pressure gas tank 13, improving the load-bearing capacity and stability of the high-pressure gas tank 13.
[0030] Working principle: When using this non-methane total hydrocarbon detection device, when gas needs to be detected by gas chromatograph 1, the rotating handle 27 is rotated by external force. The rotation of the rotating handle 27 will drive the rotating rod to rotate. Under the action of the guide slide rod 26, the moving block 230 and the mounting plate 232 will move in a direction. The movement of the mounting plate 232 will drive the sealing plate 233 to move. When the sealing plate 233 moves to close the gas inlet pipe 10, the gas to be detected is introduced into the gas inlet pipe 10. At the same time, the rotating handle 27 is continued to be rotated. The mounting plate 232 will be in the smooth area 21. At this time, the moving block 230 continues to move in the threaded area 22. When the moving block 230 is disengaged from the connecting pipe 12, the clean gas in the high-pressure gas tank 13 will enter the gas chromatograph 1, flushing the residual gas inside the instrument, thereby improving the gas detection effect of the gas chromatograph 1.
[0031] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. A non-methane total hydrocarbon detection device, comprising a gas chromatograph (1), and a gas inlet pipeline (10) and a gas outlet pipeline (11) are fixedly connected in communication with the gas chromatograph (1), characterized in that Further comprising: a connecting pipeline (12) in communication with the gas inlet pipeline (10), and the connecting pipeline (12) inputs clean gas into the gas chromatograph (1); an adjusting mechanism (2) arranged inside the gas inlet pipeline (10), and the adjusting mechanism (2) is used for opening or closing the gas inlet pipeline (10) and the connecting pipeline (12), the adjusting mechanism (2) comprises a hollow groove (20), the hollow groove (20) is fixedly connected with the gas inlet pipeline (10), a rotating rod is arranged in the hollow groove (20), the rotating rod is divided into a smooth area (21) and a threaded area (22), a control component (23) is threadedly arranged on the threaded area (22), the control component (23) comprises a moving block (230), and the moving block (230) is used for closing or opening the connecting pipeline (12), a telescopic rod (231) is fixedly arranged on one side of the moving block (230), one end of the telescopic rod (231) away from the moving block (230) is fixedly arranged with a mounting plate (232) threadedly connected with the threaded area (22), a sealing plate (233) is fixedly arranged on the mounting plate (232), and the sealing plate (233) is used for opening or closing the gas inlet pipeline (10).
2. The non-methane hydrocarbon detection device according to claim 1, wherein: One end of the connecting pipeline (12) away from the gas inlet pipeline (10) is communicated with a high-pressure gas tank (13), the high-pressure gas tank (13) is fixedly communicated with a conveying pipeline (14), and the conveying pipeline (14) conveys clean gas into the high-pressure gas tank (13).
3. The non-methane hydrocarbon detection device of claim 1, wherein: One side of the rotating rod is rotationally arranged with a stable seat (24), the outer side of the stable seat (24) is fixedly arranged with a fixed rod (25), and one end of the fixed rod (25) away from the stable seat (24) is fixedly connected with the connecting pipeline (12).
4. The non-methane hydrocarbon detection device of claim 3, wherein: One end of the rotating rod away from the stable seat (24) is slidingly penetrated through the gas inlet pipeline (10) and is fixedly arranged with a rotating handle (27).
5. The non-methane hydrocarbon detection device of claim 3, wherein: The stable seat (24) is fixedly arranged with a guide sliding rod (26), one end of the guide sliding rod (26) away from the stable seat (24) is penetrated through the moving block (230) and the mounting plate (232) and is fixedly connected with the hollow groove (20).
6. The non-methane hydrocarbon detection device of claim 2, wherein: The bottom surface of the high-pressure gas tank (13) is fixedly arranged with a base (15), and the base (15) is fixedly connected with the gas chromatograph (1).