Anti-blocking filtering structure for waste gas sampling

Abstract

The utility model discloses an anti-blocking filter structure for waste gas sampling, which comprises a sampler, a filter cartridge is arranged on the sampler, an air cylinder is arranged on the filter cartridge, a piston plate is arranged at the output end of the air cylinder, the piston plate is connected with the filter cartridge in a sliding manner, a water tank is arranged on the sampler, and the water tank is connected with the air cylinder in a sliding manner. An air inlet cylinder is arranged on the filter cylinder, a filter plate is arranged on the filter cylinder, an anti-blocking assembly is arranged in the filter cylinder, and a back-flushing assembly is arranged on the filter cylinder. By arranging the connecting shaft, the connecting block, the scraping plate and other structures, during working, when the air cylinder drives the piston plate to slide in the filtering cylinder, negative pressure is formed in the filtering cylinder, external waste gas is sucked, meanwhile, the lead screw is driven to move, the lead screw moves to drive the rotating shaft to rotate, and therefore the scraping plate is driven to rotate to scrape and wash impurity particles on the surface of the filtering plate; and blockage caused by air permeability reduction due to accumulation on the filter plate is prevented.

Description

TECHNICAL FIELD

[0001] The utility model belongs to waste gas sampling technical field especially relates to a waste gas sampling is with preventing filter structure of block. BACKGROUND

[0002] Waste gas is a kind of harmful gas generated in the production and life process of human, and it mainly comes from multiple industries and fields. In industrial production, the power, steel, smelting, chemical and petrochemical industries are the main sources of waste gas emissions. The power industry will produce a large amount of flue gas in the combustion process, which contains particulate matter, sulfur oxides, nitrogen oxides and other pollutants. The steel and smelting industries will also emit a large amount of particulate matter and harmful gases in the coking and steelmaking processes. In addition, due to the characteristics of raw materials and processes, the chemical and petrochemical industries will produce a large amount of waste gas emissions, including harmful ingredients such as volatile organic compounds.

[0003] The filter device plays a crucial role in the waste gas sampling process. As the first line of defense for waste gas entering the sampling system, it can effectively intercept and remove particulate matter, dust, fibers and other impurities in the waste gas, ensuring that the collected waste gas samples are pure and uncontaminated. Through precise filtration by the filter device, the accuracy and reliability of the sampling results can be greatly improved, avoiding interference from impurities in subsequent analysis. At the same time, the filter device can also protect the sampling equipment and analytical instruments from erosion and clogging by particulate matter, prolonging the service life of the equipment and reducing maintenance costs.

[0004] However, the existing technology has some problems: Because the waste gas contains a large amount of particulate matter, dust, oil mist and other impurities, these impurities will be intercepted and accumulated on the filter screen when passing through the filter device. With the accumulation of time, the filter screen is gradually covered with impurities, causing the air permeability to decrease and forming a blockage, which will seriously hinder the flow of waste gas, leading to a decrease in sampling flow and even a complete interruption of the sampling process. Not only will this directly affect the accuracy and representativeness of the sampling results, but it may also distort the sampling data, making it impossible to truly reflect the actual emission situation of the waste gas. In addition, the clogged filter device will also increase the burden on the sampling equipment, exacerbating the wear and tear and aging of the equipment, thus shortening its service life. Therefore, we propose a waste gas sampling anti-clogging filter structure. UTILITY MODEL CONTENTS

[0005] In view of the problems existing in the prior art, the utility model aims to provide a waste gas sampling anti-clogging filter structure. By setting the scraper and backflushing assembly, the surface of the filter plate is simultaneously scraped and washed during air suction collection, preventing the impurities in the waste gas from adhering to the surface of the filter plate and causing blockage.

[0006] The utility model discloses a kind of anti-blocking filter structures for waste gas sampling, including sampler, filter cartridge is arranged on the sampler, air cylinder is arranged on the filter cartridge, piston plate is arranged on the output end of the air cylinder, the piston plate is slidably connected with filter cartridge, water tank is arranged on the sampler, air inlet cylinder is arranged on the filter cartridge, filter plate is arranged on the filter cartridge, anti-blocking subassembly is arranged in the filter cartridge, backflushing subassembly is arranged on the filter cartridge, collection tank is arranged on the filter cartridge.

[0007] Optionally, a sampling air pipe is arranged between the filter cartridge and the sampler, a cleaning air pipe is arranged between the filter cartridge and the water tank, and a one-way valve is arranged on the sampling air pipe and the cleaning air pipe.

[0008] Optionally, the anti-blocking subassembly includes a lead screw, the lead screw is fixedly connected with the piston plate, a connecting shaft is rotatably connected to the filter plate, a rotating shaft is fixedly connected to the connecting shaft, the rotating shaft is threadedly connected with the lead screw, a connecting block is arranged on the connecting shaft, a scraper is fixedly connected to the connecting block, and the scraper is in contact with the filter plate.

[0009] Optionally, the backflushing subassembly includes an output air pipe, one end of the output air pipe is fixedly connected with the water tank, the other end of the output air pipe is provided with a rubber collar, and the rubber collar is rotatably connected with the connecting shaft.

[0010] Optionally, an air cavity is formed in the connecting shaft and the connecting block, an air inlet hole is formed in the connecting shaft, the air inlet hole is correspondingly arranged with the rubber collar, an air outlet hole is formed in the scraper, and the air outlet hole is obliquely arranged.

[0011] Optionally, the collection tank is correspondingly arranged with the filter plate, a guide plate is arranged in the collection tank, the guide plate is obliquely arranged, and the collection tank is provided with a drawer.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] 1. By arranging the connecting shaft, the connecting block and the scraper, when the piston plate slides in the filter cartridge driven by the air cylinder, a negative pressure is formed in the filter cartridge, the lead screw is moved while absorbing the waste gas from the outside, the rotating shaft is rotated driven by the movement of the lead screw, the connecting shaft and the scraper are rotated, the impurity particles on the surface of the filter plate are scraped, the accumulation of the impurity particles on the filter plate is prevented, the air permeability is prevented from being reduced, and the blockage is prevented.

[0014] 2. By arranging the water tank, the cleaning water pipe and the output air pipe, when the waste gas is collected, the waste gas filtered by the filter plate enters the bottom of the water tank through the cleaning air pipe, forms bubbles in the water, floats to the water surface, and then is input into the air cavity through the output air pipe, and the scraper is blown and cleaned through the air outlet hole.

[0015] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the overall structure schematic view provided by the present application;

[0017] Figure 2 is the filter cartridge cut schematic view provided by the present application;

[0018] Figure 3 is the water tank structure schematic view provided by the present application;

[0019] Figure 4 is the anti-blocking assembly cut schematic view provided by the present application;

[0020] Figure 5 is the connecting shaft structure schematic view provided by the present application.

[0021] In the figure: 1, sampler; 11, filter cartridge; 12, air cylinder; 13, piston plate; 14, water tank; 15, air inlet cylinder; 2, filter plate; 21, sampling air pipe; 22, cleaning air pipe; 23, one-way valve; 3, anti-blocking assembly; 31, screw rod; 32, rotating shaft; 33, connecting shaft; 34, connecting block; 35, scraper; 36, air cavity; 37, air inlet hole; 38, air outlet hole; 4, backflush assembly; 41, output air pipe; 42, rubber sleeve ring; 5, collection box; 51, guide plate; 52, drawer. DETAILED DESCRIPTION

[0022] In order to further understand the utility model content, characteristics and efficacy of the present application, the following examples are given, and the detailed description is as follows in conjunction with the drawings.

[0023] As Figures 1 to 5 shown, the anti-blocking filter structure for waste gas sampling provided by the present application embodiment, including sampler 1, the sampler 1 is provided with filter cartridge 11, the filter cartridge 11 is provided with air cylinder 12, the output end of air cylinder 12 is provided with piston plate 13, the piston plate 13 and filter cartridge 11 are slidably connected, the sampler 1 is provided with water tank 14, the filter cartridge 11 is provided with air inlet cylinder 15, the filter cartridge 11 is provided with filter plate 2, the inside of filter cartridge 11 is provided with anti-blocking assembly 3, the filter cartridge 11 is provided with backflush assembly 4, the filter cartridge 11 is provided with collection box 5.

[0024] Further, the piston plate 13 is driven by the air cylinder 12 to slide in the filter cylinder 11, a negative pressure is formed in the filter cylinder 11 to provide suction for waste gas sampling, the waste gas is filtered by the filter plate 2, and the waste gas sampling is performed, the water tank 14 cooperates with the backflushing assembly 4, after the water flows to filter the waste gas, the filter plate 2 and the scraper 35 are purged, the blockage is removed, the filter is kept unblocked, meanwhile, the collection tank 5 is convenient for collecting the treated waste gas sample, and the sampling quality is ensured. The overall design realizes efficient anti-blocking, easy maintenance and accurate sampling, and provides reliable protection for waste gas collection.

[0025] Specifically, the sampling air pipe 21 is arranged between the filter cylinder 11 and the sampler 1, and the cleaning air pipe 22 is arranged between the filter cylinder 11 and the water tank 14. The one-way valve 23 is arranged on the sampling air pipe 21 and the cleaning air pipe 22.

[0026] Further, the collected waste gas enters the filter cylinder 11 after being filtered by the filter plate 2, part of the waste gas enters the sampler 1 through the sampling air pipe 21, and the other part enters the water tank 14 through the cleaning air pipe 22 to provide clean air flow for the anti-blocking assembly 3, which is used for cleaning the filter plate 2 and the scraper 35. Meanwhile, the one-way valves 23 on the sampling air pipe 21 and the cleaning air pipe can make the gas only out of the filter cylinder 11, preventing backflow of the gas.

[0027] Specifically, the anti-blocking assembly 3 includes a lead screw 31, the lead screw 31 is fixedly connected with the piston plate 13, a connecting shaft 33 is rotatably connected to the filter plate 2, a rotating shaft 32 is fixedly connected to the connecting shaft 33, the rotating shaft 32 is threadedly connected with the lead screw 31, a connecting block 34 is arranged on the connecting shaft 33, a scraper 35 is fixedly connected to the connecting block 34, and the scraper 35 is in contact with the filter plate 2.

[0028] Further, when the piston plate 13 slides in the filter cylinder 11, the lead screw 31 moves synchronously, and drives the rotating shaft 32 threadedly connected therewith to rotate. The connecting shaft 33 fixedly connected to the rotating shaft 32 rotates, and in turn drives the connecting block 34 and the scraper 35 thereon to slide on the surface of the filter plate 2. The close contact between the scraper 35 and the filter plate 2 ensures that the particulate matter attached to the filter plate 2 is effectively scraped off, preventing blockage from occurring. Not only does this improve the filtering efficiency and reduce the frequency of manual cleaning, but it also ensures the continuity and stability of the sampling process, providing more accurate and reliable data support for waste gas monitoring, greatly improving work efficiency and sampling quality.

[0029] Specifically, the backflushing assembly 4 includes an output air pipe 41, one end of the output air pipe 41 is fixedly connected with the water tank 14, the other end of the output air pipe 41 is provided with a rubber sleeve ring 42, and the rubber sleeve ring 42 is rotatably connected with the connecting shaft 33.

[0030] It should be noted that the rubber ring 42 is connected with the output air pipe 41, and the inner side of the rubber air pipe is opened. The connecting shaft 33 is arranged correspondingly with the rubber ring 42, and the width of the two is consistent, so that the connecting shaft 33 and the rubber sleeve form a closed area, which ensures that the gas is discharged from the exhaust hole 38 through the air cavity 36.

[0031] Specifically, the connecting shaft 33 and the inside of the connecting block 34 form an air cavity 36. The connecting shaft 33 is provided with an air inlet hole 37, and the air inlet hole 37 is arranged correspondingly with the rubber ring 42. The scraper 35 is provided with an exhaust hole 38, and the exhaust hole 38 is arranged obliquely.

[0032] Further, when the exhaust gas is collected, the collected exhaust gas enters the bottom of the water tank 14 through the cleaning air pipe 22, forms bubbles in the water, and further purifies the impurities in the exhaust gas by using the absorption of water. After the gas floats to the water surface, it is input into the air cavity 36 through the output air pipe 41, and the scraper 35 is blown and cleaned through the exhaust hole 38. The inclined exhaust hole 38 not only ensures that the gas can uniformly and powerfully blow to the surface of the scraper 35, effectively removes the residues and impurities on the scraper 35, and improves the cleaning efficiency; but also avoids the direct impact of the gas on the filter plate 2, reduces the potential damage to the filter plate 2, and prolongs the service life of the filter plate 2. In addition, this design also promotes the uniform distribution of airflow, so that every part of the scraper 35 can be fully cleaned, ensuring the cleanliness of the scraper 35 and the accuracy of the sampling process.

[0033] Specifically, the collection box 5 is arranged correspondingly with the filter plate 2, and the collection box 5 is provided with a guide plate 51. The guide plate 51 is arranged obliquely, and the collection box 5 is provided with a drawer 52.

[0034] Further, the collection box 5 is arranged correspondingly with the filter plate 2, which can directly receive the particulate matter and impurities scraped off from the filter plate 2, avoiding the scattering and secondary pollution of the impurities. Secondly, the guide plate 51 arranged obliquely uses the action of gravity to guide the particulate matter and impurities to slide along the inclined surface to the bottom of the collection box 5, which is convenient for centralized treatment and cleaning. Furthermore, the design of the drawer 52 makes the cleaning process more convenient. The user only needs to easily pull out the drawer 52 to take out the collected impurities, without the need to enter the inside of the collection box 5 for tedious cleaning work, greatly improving the operation convenience and work efficiency.

[0035] Working principle: when working, the cylinder 12 drives the piston plate 13 to slide in the filter cylinder 11, a negative pressure is formed in the filter cylinder 11, the waste gas outside is sucked at the same time, the lead screw 31 is driven to move, the lead screw 31 drives the rotating shaft 32 to rotate, thereby driving the connecting shaft 33 and the scraper 35 to rotate, the impurity particles on the surface of the filter plate 2 are scraped and washed, the accumulation on the filter plate 2 is prevented, the gas permeability is prevented from being reduced, the blockage is formed, at the same time, when the waste gas is collected, the collected waste gas enters the bottom of the water tank 14 through the cleaning gas pipe 22, the bubbles are formed in the water, the absorption of the water is utilized to further purify the impurities in the waste gas, after the gas floats to the water surface, the output gas pipe 41 is used for inputting the gas cavity 36, the scraper 35 is blown and cleaned through the exhaust hole 38.

[0036] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A clogging-preventing filter structure for exhaust gas sampling, comprising a sampler (1), characterized in that: The sampler (1) is provided with a filter cartridge (11), the filter cartridge (11) is provided with a cylinder (12), the output end of the cylinder (12) is provided with a piston plate (13), the piston plate (13) is in sliding connection with the filter cartridge (11), the sampler (1) is provided with a water tank (14), the filter cartridge (11) is provided with an air inlet cylinder (15), the filter cartridge (11) is provided with a filter plate (2), the inside of the filter cartridge (11) is provided with an anti-blocking assembly (3), the filter cartridge (11) is provided with a backflushing assembly (4), and the filter cartridge (11) is provided with a collection tank (5).

2. The anti-blocking filter structure for exhaust gas sampling according to claim 1, wherein: The filter cartridge (11) and the sampler (1) are provided with a sampling air pipe (21), and the filter cartridge (11) and the water tank (14) are provided with a cleaning air pipe (22), and the sampling air pipe (21) and the cleaning air pipe (22) are provided with a one-way valve (23).

3. The anti-blocking filter structure for exhaust gas sampling according to claim 1, wherein: The anti-blocking assembly (3) comprises a lead screw (31), the lead screw (31) is fixedly connected with the piston plate (13), the filter plate (2) is rotatably connected with a connecting shaft (33), the connecting shaft (33) is fixedly connected with a rotating shaft (32), the rotating shaft (32) is in threaded connection with the lead screw (31), the connecting shaft (33) is provided with a connecting block (34), the connecting block (34) is fixedly connected with a scraper (35), and the scraper (35) is in contact with the filter plate (2).

4. The anti-clogging filter structure for exhaust gas sampling according to claim 1, wherein: The backflushing assembly (4) comprises an output air pipe (41), one end of the output air pipe (41) is fixedly connected with the water tank (14), the other end of the output air pipe (41) is provided with a rubber sleeve ring (42), and the rubber sleeve ring (42) is rotatably connected with the connecting shaft (33).

5. The anti-clogging filter structure for exhaust gas sampling according to claim 3, wherein: The connecting shaft (33) and the connecting block (34) are internally formed with an air cavity (36), the connecting shaft (33) is provided with an air inlet hole (37), the air inlet hole (37) is correspondingly provided with the rubber sleeve ring (42), and the scraper (35) is provided with an air outlet hole (38), and the air outlet hole (38) is inclined.

6. The anti-clogging filter structure for exhaust gas sampling according to claim 1, wherein: The collection tank (5) is correspondingly provided with the filter plate (2), the collection tank (5) is provided with a guide plate (51), the guide plate (51) is inclined, and the collection tank (5) is provided with a drawer (52).

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