A device for detecting nitrogen oxide content in industrial waste gas

Abstract

This utility model discloses a device for detecting nitrogen oxide content in industrial waste gas, comprising: a nitrogen oxide detector and a filter assembly. The nitrogen oxide detector's U-shaped inlet pipe has filter cartridges installed at both ends, which can uniformly filter impurities and dust from the waste gas during detection through their inner filter elements. This prevents impurities and dust from accumulating inside the nitrogen oxide detector and affecting its service life. Simultaneously, the U-shaped inlet pipe and filter cartridges at both ends of the U-shaped inlet pipe ensure that removing the filter element from one filter cartridge does not affect the detector's operation. Furthermore, when removing the filter element, the air plug in the threaded connecting pipe can seal the inlet plate, thereby sealing the disassembly end of the U-shaped inlet pipe and preventing external dust and impurities from being drawn into the nitrogen oxide detector.

Description

Technical Field

[0001] This utility model relates to the field of waste gas detection technology, specifically a device for detecting nitrogen oxide content in industrial waste gas. Background Technology

[0002] A nitrogen oxide detector is an instrument used to detect the nitrogen oxide content in industrial waste gas. It can effectively monitor nitrogen oxide emissions, thereby reducing the occurrence of accidents. Nitrogen oxides, mainly nitric oxide and nitrogen dioxide, are an important cause of photochemical smog and acid rain. Photochemical smog has a special odor, irritates the eyes, damages plants, and reduces atmospheric visibility.

[0003] Existing nitrogen oxide content detection devices in exhaust gas, such as the industrial exhaust gas nitrogen oxide content detection device disclosed in publication number CN218995287U, have the advantages of digitally displaying the nitrogen oxide content in the gas, simple structure, small size, and easy operation and portability. However, the disassembly and cleaning of the filter screen in the air inlet pipe makes it inconvenient to use the nitrogen oxide content detection device. Therefore, we propose an industrial exhaust gas nitrogen oxide content detection device. Utility Model Content

[0004] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, the technical solution adopted by this utility model is as follows:

[0006] A device for detecting nitrogen oxide content in industrial waste gas includes: a nitrogen oxide detector and a filter assembly; the nitrogen oxide detector includes a U-shaped air inlet pipe fixedly installed on one side; the filter assembly includes filter cylinders movably installed at both ends of the U-shaped air inlet pipe, threaded connecting pipes fixedly connected to one end of each filter cylinder, filter elements movably installed inside each filter cylinder, sealing caps movably installed at one end of each filter cylinder, air inlet plates fixedly installed inside each threaded connecting pipe, air holes arranged on each air inlet plate, mounting holes in the middle of each air inlet plate, and movable rods movably installed inside each mounting hole.

[0007] Preferably, a fixing plate is fixedly installed at one end of each of the movable rods, and air plugs are arranged and fixedly installed on each of the fixing plates, with the air plugs matching the air holes.

[0008] Preferably, each of the movable rods is also movably fitted with a spring at its outer end.

[0009] Preferably, a pressure rod is also fixedly installed in the middle of each sealing cover.

[0010] Preferably, an inner positioning ring and an outer positioning ring are fixedly installed inside the filter cylinder and the sealing cover, respectively, and the filter element is movably installed between the inner positioning ring and the outer positioning ring. A sealing gasket is also fixedly installed inside both the inner positioning ring and the outer positioning ring.

[0011] Preferably, each of the sealing caps is also fixedly installed with a threaded inner ring, and the filter cylinder is also provided with an internal thread, and the internal thread and the threaded inner ring are matched and connected.

[0012] Preferably, both ends of the U-shaped air intake pipe are provided with external threads, and the external threads are matched and connected with the threaded connecting pipe.

[0013] Preferably, each filter cartridge is also provided with an air inlet.

[0014] By adopting the above technical solution, the beneficial effects achieved by this utility model are as follows:

[0015] In this invention, the filter cartridges installed at both ends of the U-shaped air inlet pipe on the outside of the nitrogen oxide detector can uniformly filter impurities and dust from the exhaust gas drawn in during detection through the filter element at its inner end. This prevents impurities and dust from accumulating inside the nitrogen oxide detector and affecting its service life. At the same time, the U-shaped air inlet pipe at the outside of the nitrogen oxide detector and the filter cartridges installed at both ends of the U-shaped air inlet pipe can also ensure that the removal of the filter element in one of the filter cartridges will not affect the detection and use of the nitrogen oxide detector. Furthermore, when the filter element in the filter cartridge is removed, the air plug in the threaded connecting pipe can also block the air inlet plate, thereby blocking the removal end of the U-shaped air inlet pipe and preventing external dust and impurities from being drawn into the nitrogen oxide detector. Attached Figure Description

[0016] Figure 1 This is an overall structural diagram of the present invention;

[0017] Figure 2 This is a disassembly diagram of the filter cartridge of this utility model;

[0018] Figure 3 This is a structural diagram of the filter cartridge of this utility model;

[0019] Figure 4 This is a side sectional view of the filter cartridge of this utility model;

[0020] Figure 5 This is an exploded view of the filter cartridge of this utility model;

[0021] Figure 6 This is a structural diagram of the air intake disc of this utility model;

[0022] Figure 7 This is a structural diagram of the sealing cap of this utility model.

[0023] Figure label:

[0024] 100. Nitrogen oxide detector; 101. U-shaped air inlet pipe;

[0025] 200. Filter assembly; 201. Filter cartridge; 202. Threaded connecting pipe; 203. Filter element; 204. Sealing cap; 205. Air inlet plate; 206. Air hole; 207. Mounting hole; 208. Movable rod; 209. Fixing plate; 210. Air plug; 211. Spring; 212. Pressure rod; 213. Inner positioning ring; 214. Outer positioning ring; 215. Sealing gasket; 216. Threaded inner ring; 217. Internal thread; 218. External thread; 219. Air inlet. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0027] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, a device for detecting nitrogen oxide content in industrial waste gas.

[0028] Example 1:

[0029] Combination Figure 1-7As shown, this utility model provides a nitrogen oxide content detection device in industrial waste gas, comprising: a nitrogen oxide detector 100 and a filter assembly 200; the nitrogen oxide detector 100 includes a U-shaped air inlet pipe 101 fixedly installed on one side; the filter assembly 200 includes filter cylinders 201 movably installed at both ends of the U-shaped air inlet pipe 101, threaded connecting pipes 202 fixedly connected to one end of the filter cylinders 201, filter elements 203 movably installed inside the filter cylinders 201, sealing caps 204 movably installed at one end of the filter cylinders 201, air inlet plates 205 fixedly installed inside the threaded connecting pipes 202, air holes 206 arranged on the air inlet plates 205, mounting holes 207 in the middle of the air inlet plates 205, movable rods 208 movably installed in the mounting holes 207, and fixing plates 209 fixedly installed at one end of each movable rod 208, with air holes 206 also arranged on the fixing plates 209. The plug 210 and the air plug 210 are matched with the air hole 206. The outer end of the movable rod 208 is also movably installed with a spring 211. The middle of the sealing cover 204 is also fixedly installed with a pressure rod 212. The filter cylinder 201 and the sealing cover 204 are respectively fixedly installed with an inner positioning ring 213 and an outer positioning ring 214. The filter element 203 is movably installed between the inner positioning ring 213 and the outer positioning ring 214. The inner positioning ring 213 and the outer positioning ring 214 are also fixedly installed with a sealing gasket 215. The inner end of the sealing cover 204 is also fixedly installed with a threaded inner ring 216. The filter cylinder 201 is also provided with an internal thread 217, and the internal thread 217 is matched and connected with the threaded inner ring 216. The two ends of the U-shaped air inlet pipe 101 are also provided with external threads 218, and the external threads 218 are matched and connected with the threaded connecting pipe 202. The filter cylinder 201 is also provided with air inlets 219.

[0030] Specifically, the nitrogen oxide detector is an instrument for detecting the nitrogen oxide content in industrial waste gas. The filter cartridges 201 installed at both ends of the U-shaped air inlet pipe 101 on the outside of the nitrogen oxide detector 100 can uniformly filter impurities and dust from the waste gas drawn in during detection through their inner filter elements 203, thereby preventing impurities and dust from accumulating inside the nitrogen oxide detector 100 and affecting its service life. Simultaneously, the U-shaped air inlet pipe 101 at the outer end of the nitrogen oxide detector 100, and the filter cartridges 201 at both ends of the U-shaped air inlet pipe 101... The installed filter cartridge 201 also ensures that the removal of the filter element 203 inside one side of the filter cartridge 201 will not affect the detection and use of the nitrogen oxide detector 100. Furthermore, when the filter element 203 inside the filter cartridge 201 is removed, the air plug 210 inside the threaded connecting pipe 202 can also block the air inlet plate 205, thereby blocking the removal end of the U-shaped air inlet pipe 101, to prevent external dust and impurities from being drawn into the nitrogen oxide detector 100. The threaded connecting pipe 202 at the rear end of the filter cartridge 201 is mainly used for... During the installation at the front end, the air vents 206 on the air intake plate 205 are mainly used for airflow. During the removal of the sealing cap 204 at the outer end of the filter cartridge 201, the pressure rod 212 at the inner end of the sealing cap 204 will disengage from the pressure on the movable rod 208 in the middle of the air intake plate 205. This allows the movable rod 208 to, via the spring 211, insert the air plug 210 inside the fixing plate 209 at the other end into the air vent 206, thereby sealing the threaded connection pipe 202 and preventing external dust and impurities from entering through the threaded connection pipe 202. The U-shaped air inlet pipe 101, the inner positioning ring 213 and the outer positioning ring 214 installed in the filter cartridge 201 and the sealing cover 204, and the sealing gasket 215 installed in the inner positioning ring 213 and the outer positioning ring 214 are mainly used for the installation and positioning of the filter element 203 and the compression and sealing of both ends. The threaded inner ring 216 installed in the inner end of the sealing cover 204 is mainly used for the threaded connection of the sealing cover 204 to one end of the filter cartridge 201. The air inlet 219 opened at the outer end of the filter cartridge 201 is mainly used for the intake of external exhaust gas during detection.

[0031] Working principle and usage process of this utility model:

[0032] When replacing the filter element 203 inside the filter cartridge 201 at one end of the U-shaped intake pipe 101 on the outside of the nitrogen oxide detector 100, the nitrogen oxide detector 100 can be turned off without rotating the sealing cap 204 at the outer end of the filter cartridge 201. During the removal of the sealing cap 204, the inner pressure rod 212 will gradually disengage from pressing against the movable rod 208 in the middle of the intake disc 205 as it moves outward. After the sealing cap 204 is completely removed, the movable rod 208 in the intake disc 205, no longer pressed, will be released by the spring 211 at its outer end, which will then release the pressure on the other end of the movable rod 208. The air plugs 210 are pressed into the air holes 206 in the intake plate 205 to seal the intake plate 205, thereby preventing external dust and impurities from entering the U-shaped intake pipe 101 through the threaded connecting pipe 202. Then, the filter element 203 at the inner end of the filter cartridge 201 is removed, the inner end of the filter cartridge 201 is cleaned, and the filter element 203 is replaced. Then, the sealing cover 204 can be reinstalled. After the sealing cover 204 is installed, the movable rod 208 is pressed again by the pressure rod 212 to reopen the air holes 206 at the upper end of the intake plate 205 for nitrogen oxide detection.

[0033] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A device for detecting nitrogen oxide content in industrial waste gas, characterized in that, include: Nitrogen oxide detector (100), filter assembly (200); The nitrogen oxide detector (100) includes a U-shaped air inlet pipe (101) fixedly mounted on one side; The filter assembly (200) includes a filter cylinder (201) that is movably installed at both ends of a U-shaped air inlet pipe (101), a threaded connecting pipe (202) that is fixedly connected to one end of the filter cylinder (201), a filter element (203) that is movably installed inside the filter cylinder (201), a sealing cap (204) that is movably installed at one end of the filter cylinder (201), an air inlet plate (205) that is fixedly installed inside the threaded connecting pipe (202), air holes (206) arranged on the air inlet plate (205), mounting holes (207) in the middle of the air inlet plate (205), and movable rods (208) that are movably installed inside the mounting holes (207).

2. The device for detecting nitrogen oxide content in industrial waste gas according to claim 1, characterized in that, One end of each of the movable rods (208) is also fixedly installed with a fixing plate (209), and each fixing plate (209) is also fixedly installed with an air plug (210), and the air plug (210) matches the air hole (206).

3. The device for detecting nitrogen oxide content in industrial waste gas according to claim 1, characterized in that, The outer end of each movable rod (208) is also movably fitted with a spring (211).

4. The device for detecting nitrogen oxide content in industrial waste gas according to claim 1, characterized in that, Each of the sealing caps (204) is also fixedly installed with a pressure rod (212) in the middle.

5. The device for detecting nitrogen oxide content in industrial waste gas according to claim 1, characterized in that, An inner positioning ring (213) and an outer positioning ring (214) are fixedly installed inside the filter cartridge (201) and the sealing cover (204), respectively. The filter element (203) is movably installed between the inner positioning ring (213) and the outer positioning ring (214). A sealing gasket (215) is also fixedly installed inside both the inner positioning ring (213) and the outer positioning ring (214).

6. The device for detecting nitrogen oxide content in industrial waste gas according to claim 1, characterized in that, The inner end of the sealing cover (204) is also fixedly installed with a threaded inner ring (216), and the filter cylinder (201) is also provided with an internal thread (217), and the internal thread (217) and the threaded inner ring (216) are matched and connected.

7. The device for detecting nitrogen oxide content in industrial waste gas according to claim 1, characterized in that, Both ends of the U-shaped air intake pipe (101) are provided with external threads (218), and the external threads (218) are matched and connected with the threaded connecting pipe (202).

8. The device for detecting nitrogen oxide content in industrial waste gas according to claim 1, characterized in that, The filter cartridge (201) is also provided with air inlets (219).

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