Rotary back-flushing filtering device

Abstract

The utility model discloses a rotary back-flushing filtering device, which comprises an air supply component, a back-flushing component, a back-flushing component, a back-flushing component, a back-flushing component, a back-flushing component, a back-flushing component, a back-flushing component and a back-flushing component, the back-blowing assembly comprises a back-blowing main pipe and a plurality of back-blowing auxiliary pipes, the back-blowing main pipe is connected with the back-blowing auxiliary pipes and an air conveying pipeline in the air supply assembly, each back-blowing auxiliary pipe is provided with air blowing ports arranged in rows, the back-blowing auxiliary pipes spray high-pressure airflow from inside to outside to the filter elements through the air blowing ports, and the back-blowing auxiliary pipes can rotate with the center of the back-blowing main pipe as the circle center; the partition plate assembly comprises a blowback cover plate movably installed at the upper end of the blowback main pipe through an elastic structure, an air outlet hole is formed in the upper end of the blowback main pipe, and the blowback main pipe sprays air through the air outlet hole to enable the blowback cover plate to be pressed downwards till the upper opening of the filter element is closed; when the air outlet hole of the blowback main pipe stops spraying air, the blowback cover plate is reset through the elastic structure to open the upper opening of the filter element. The rotary back-flushing filtering device disclosed by the utility model has a better back-flushing effect on the filter element.

Description

Technical Field

[0001] This utility model relates to a rotary backflushing filter device, which is mainly used in sweepers, vacuum trucks, etc., and belongs to the field of road cleaning. Background Technology

[0002] Traditional sweeper filters trap air flowing in from the outside, trapping material on the outside. However, these filters are prone to clogging after prolonged use. Cleaning typically involves using a venturi-guided airflow for backflushing, but because the venturi is located above the filter outlet, it doesn't penetrate deep into the filter for close-range backflushing, resulting in poor cleaning effectiveness. Furthermore, the fan continues to run during backflushing, constantly drawing air from the filter, which counteracts some of the high-pressure airflow, further weakening the cleaning process. Summary of the Invention

[0003] In view of the problems existing in the prior art, the present invention provides a rotary backflushing filter device to improve the backflushing cleaning effect of the filter element.

[0004] To achieve the above objectives, this utility model employs a rotary backflushing filter device, comprising:

[0005] The gas supply assembly includes a gas reservoir and a pulse control valve connected to the gas reservoir, wherein the pulse control valve is connected to a gas supply pipeline.

[0006] The backflush assembly includes a backflush main pipe and a plurality of backflush auxiliary pipes arranged in the circumferential direction of the backflush main pipe. The backflush main pipe is connected to the backflush auxiliary pipes and the air supply pipeline in the air supply assembly. Each backflush auxiliary pipe is provided with air outlets arranged in a row. The backflush auxiliary pipes spray high-pressure airflow from the inside to the outside onto the filter element through the air outlets. The backflush auxiliary pipes can rotate around the center of the backflush main pipe.

[0007] The baffle assembly includes a backflush cover plate that is movably mounted on the upper end of the backflush main pipe via an elastic structure. The upper end of the backflush main pipe is provided with an air outlet. The backflush main pipe sprays air through the air outlet, causing the backflush cover plate to press down and close the upper opening of the filter element. When the air outlet of the backflush main pipe stops spraying air, the backflush cover plate resets via the elastic structure to open the upper opening of the filter element.

[0008] In some embodiments, the inlet end of the pulse control valve is connected to the air reservoir, the outlet end is connected to the air supply pipeline, and the air supply pipeline is connected to the inlet of a plurality of backflush main pipes.

[0009] In some embodiments, a backflush fixing bracket is installed at the upper end of the backflush main pipe, and the backflush fixing bracket has a three-claw support structure.

[0010] In some embodiments, there are two backflush auxiliary pipes, which are symmetrically arranged on both sides of the backflush main pipe. The high-pressure airflows ejected from the two backflush auxiliary pipes are in opposite directions and are sprayed at an angle toward the inner wall of the filter element.

[0011] In some embodiments, the upper end of each backflush auxiliary pipe is connected to an upper horizontal pipe, and a round hole seat is installed on the backflush main pipe between the two upper horizontal pipes. The round hole seat has an airflow channel communicating with the backflush main pipe. A bearing and a sealing ring are installed inside the round hole seat. The backflush auxiliary pipe is installed on the bearing and sealed by the sealing ring. The backflush auxiliary pipe enters air from the backflush main pipe through the airflow channel of the upper horizontal pipe and the round hole seat. The upper end, middle part and lower end of each backflush auxiliary pipe are rotatably connected to the backflush main pipe through bearings.

[0012] In some embodiments, the distance between the air inlet on the backflush auxiliary pipe and the inner wall of the filter element is 5-10 mm.

[0013] In some embodiments, the elastic structure includes an upper sleeve mounted on the upper end of the backflush main pipe and a spring connected to the upper sleeve. The spring is fitted onto the backflush main pipe, and the upper end of the spring is connected to the upper sleeve. The backflush cover is annular, fitted onto the spring, and the middle part of the backflush cover is connected to the spring. The backflush cover moves up and down along the backflush main pipe together with the spring.

[0014] In some embodiments, the upper sleeve is fitted onto the backflush main pipe, with the upper end of the upper sleeve sealed and the lower end open. The air outlet is located on the backflush main pipe inside the upper sleeve, and the air jet from the air outlet is sprayed from the lower end opening of the upper sleeve toward the backflush cover plate, pushing the backflush cover plate downward to close the upper opening of the filter element.

[0015] In some embodiments, the main backflush pipe is arranged coaxially with the filter element, and the lower end of each auxiliary backflush pipe extends into the interior of the filter element and extends to the bottom of the filter element.

[0016] Compared with the prior art, the rotary backflushing filter device of this utility model uses high-pressure airflow from the backflushing auxiliary pipe to backflush the filter element from the inside out. The air outlet of the high-pressure airflow is closer to the filter element, resulting in a better backflushing effect. At the same time, the backflushing auxiliary pipe can rotate, which can clean the entire inner surface of the filter element. During backflushing, the backflushing cover plate at the top covers the filter element outlet, thereby avoiding the influence of the fan's suction on the high-pressure backflushing gas and improving the backflushing cleaning effect on the filter element. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a structural schematic diagram of the backflush assembly and the baffle assembly of this utility model;

[0020] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle;

[0021] Figure 4 for Figure 2 A magnified view of a portion of point B in the middle;

[0022] Figure 5 for Figure 2 A magnified view of a portion of point C in the middle;

[0023] Figure 6 Top view of the backflush assembly arrangement inside the filter element;

[0024] In the diagram: 1. Air manifold, 2. Pulse control valve, 3. Through-wall pipe, 4. Air pipe, 5. T-connector, 6. Backflush bracket, 7. Box partition, 8. Backflush main pipe, 9. Nut, 10. Support claw, 11. Upper sleeve, 12. Backflush cover plate, 13. Spring, 14. Backflush auxiliary pipe, 15. Locking nut, 16. Filter element, 17. Sealing ring, 18. Bearing, 19. Bolt, 20. Pressure block, 21. High-pressure airflow, 22. Air outlet, 23. Air blowing port, 24. Upper horizontal pipe, 25. Round hole seat. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this application will be described in detail below through specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0026] like Figures 1 to 6 As shown, a rotary backflush filter includes an air supply assembly, a backflush assembly, and a baffle assembly. The air supply assembly includes an air tank 1 and a pulse control valve 2 connected to the air tank 1. The pulse control valve 2 is connected to an air delivery pipeline. The air tank 1 is connected to an air compressor. The high-pressure gas generated by the air compressor is stored in the air tank 1 and then controlled by the pulse control valve 2 to enter the air delivery pipeline.

[0027] The backflush assembly includes a backflush main pipe 8 and a plurality of backflush auxiliary pipes 14 arranged in the circumferential direction of the backflush main pipe 8. The backflush main pipe 8 is connected to the backflush auxiliary pipes 14 and the air supply pipeline in the air supply assembly. Each backflush auxiliary pipe 14 is provided with air outlets 23 arranged in a row. The high-pressure gas in the air supply pipeline enters the backflush main pipe 8 and continues to flow through the backflush main pipe 8 into the backflush auxiliary pipes 14. The backflush auxiliary pipes 14 blow the filter element 16 from the inside to the outside through the air outlets 23. During the blowing process, the backflush auxiliary pipes 14 can rotate around the center of the backflush main pipe 8, so that the high-pressure airflow 21 of the backflush auxiliary pipes 14 can backflush the filter element 16 360°.

[0028] The baffle assembly includes a backflush cover 12 that is movably mounted on the upper end of the backflush main pipe 8 via an elastic structure. The upper end of the backflush main pipe 8 is provided with an air outlet 22. The backflush main pipe 8 sprays air through the air outlet 22, causing the backflush cover 12 to press down and close the upper outlet of the filter element 16. This prevents the suction of the fan from affecting the high-pressure gas during backflush and improves the backflush cleaning effect on the filter element 16. When the backflush main pipe 8 stops spraying air, the backflush cover 12 resets via an elastic structure to open the upper outlet of the filter element 16, ensuring the normal use of the filter element 16.

[0029] In some embodiments, such as Figure 1 As shown, the inlet of the pulse control valve 2 is connected to the air tank 1, and the outlet is connected to the housing through the wall-mounted pipe 3. The wall-mounted pipe 3 is connected to the air inlet of multiple backflushing main pipes 8 through the air pipe 4, tee connector 5, elbow connector, etc., which can backflush and clean multiple filter elements 16. Each filter element 16 is placed vertically in the housing, and the upper end of the filter element 16 is pressed together with the pressure block 20 by bolts 19.

[0030] In some embodiments, such as Figure 1 , Figure 2 As shown, the upper end of the backflush main pipe 8 is equipped with a backflush fixing bracket 6 by a nut 9. The backflush main pipe 8 is fixed to the top of the box partition 7 by the backflush fixing bracket 6. The bottom of the backflush fixing bracket 6 has three support claws 10 for supporting on the box partition 7, which makes the support more stable.

[0031] In some embodiments, such as Figure 1 , Figure 2 and Figure 6 As shown, there are two backflush auxiliary pipes 14, which are symmetrically arranged on both sides of the backflush main pipe 8. The high-pressure airflow 21 ejected from the air outlets 23 on the two backflush auxiliary pipes 14 is in opposite directions. At the same time, the high-pressure airflow 21 is designed to be sprayed at an angle towards the inner wall of the filter element 16, so that the backflush auxiliary pipes 14 can rotate through the action of the high-pressure airflow 21. When the backflush auxiliary pipes 14 rotate, they can backflush the filter element 16 360°.

[0032] In some embodiments, such as Figures 1 to 4 As shown, each backflush auxiliary pipe 14 has an upper horizontal pipe 24 installed at its upper end for connecting to the backflush main pipe 8. A round hole seat 25 is installed on the backflush main pipe 8 between the two upper horizontal pipes 24. The round hole seat 25 has an airflow channel that communicates with the backflush main pipe 8. A bearing 18 and a sealing ring 17 are installed inside the round hole seat 25.

[0033] One end of the upper horizontal pipe 24 is mounted on the bearing 18, and the other end is connected to the backflushing auxiliary pipe 14. The backflushing auxiliary pipe 14 and the upper horizontal pipe 24 can rotate around the backflushing main pipe 8 via the bearing 18. At the same time, the connection between the upper horizontal pipe 24 and the backflushing main pipe 8 is sealed by the sealing ring 17. The high-pressure gas in the backflushing main pipe 8 flows to the upper horizontal pipe 24 through the airflow channel of the round hole seat 25, and then flows to the backflushing auxiliary pipe 14 (e.g., Figure 3 (As indicated by the middle arrow); In addition, in order to improve the stability of the overall structure rotation, a middle horizontal pipe is installed in the middle of each backflush auxiliary pipe 14 and a lower horizontal pipe is installed at the lower end. The middle horizontal pipe and the lower horizontal pipe are rotatably connected to the backflush main pipe 8 through the bearing 18, so that the backflush auxiliary pipe 14 can rotate freely around the backflush main pipe 8 under the reaction of the high-pressure airflow 21.

[0034] In some embodiments, such as Figure 6 As shown, the distance between the air outlet 23 on the backflush auxiliary pipe 14 and the inner wall of the filter element 16 is 5-10mm. This allows for the smooth installation of the backflush auxiliary pipe 14 and also ensures that the high-pressure airflow 21 maintains a high pressure to blow onto the filter element 16, causing the accumulated dust on the filter element 16 to detach.

[0035] In some embodiments, such as Figure 1 , Figure 2 and Figure 5 As shown, the elastic structure includes an upper sleeve 11 installed on the upper end of the backflush main pipe 8 and a spring 13 connected to the upper sleeve 11. The spring 13 is fitted on the backflush main pipe 8, and the upper end of the spring 13 is connected to the upper sleeve 11. The backflush cover plate 12 is annular, fitted on the spring 13, and the middle part of the backflush cover plate 12 is connected to the spring 13. When the backflush main pipe 8 sprays air through the air outlet 22 to press down the backflush cover plate 12, the spring 13 stretches downward until the backflush cover plate 12 covers the upper outlet of the filter element 16. When the backflush main pipe 8 stops spraying air, the spring 13 rebounds, driving the backflush cover plate 12 to move upward synchronously, so that the upper outlet of the filter element 16 opens.

[0036] In some embodiments, such as Figure 5 As shown, the upper sleeve 11 is fitted onto the backflush main pipe 8. The upper end of the upper sleeve 11 is sealed, and the lower end is open. The air outlet 22 is located on the backflush main pipe 8 inside the upper sleeve 11, and the air jet from the air outlet 22 is ejected from the lower end opening of the upper sleeve 11 (e.g., Figure 5(As indicated by the arrow) the gas blows through the gaps around the upper sleeve 11 and the backflush main pipe 8 toward the backflush cover 12. Due to the blowing of the high-pressure gas, the backflush cover 12 moves down and fits against the housing partition 7, closing the upper opening of the filter element 16 and forming a sealed space for the filter element.

[0037] In some embodiments, such as Figure 1 As shown, the backflush main pipe 8 is coaxially arranged with the filter element 16. The bottom of the backflush main pipe 8 is supported and fixed by the locking nut 15, which can ensure the balance and stability of the overall structure. The lower end of each backflush auxiliary pipe 14 extends into the interior of the filter element 16 and extends to the bottom of the filter element 16, ensuring that the filter element 16 can be backflush cleaned to the maximum extent.

[0038] The specific usage process is as follows:

[0039] The high-pressure gas generated by the air compressor is stored in the air tank 1, and then controlled by the pulse control valve 2 to enter the air supply pipeline; it continues to enter multiple parallel-arranged backflush main pipes 8. A small portion of the high-pressure gas is ejected through the air outlet 22 at the upper end of the backflush main pipe 8, causing the backflush cover plate 12 to be pressed down until it covers the outlet of the filter element 16, eliminating the influence of the fan on the high-pressure backflush gas. The majority of the high-pressure gas enters the backflush auxiliary pipe 14 from the backflush main pipe 8, and is distributed in rows on the backflush auxiliary pipe 14. The air outlet 23 is tilted and blows air towards the inner wall of the filter element 16. Because the air outlet 23 is close to the filter element 16, the high-pressure airflow 21 can pass through the inner surface of the filter element 16 to the outer surface, thereby removing the accumulated dust on the outer surface of the filter element 16 and achieving a good dust removal effect. At the same time, the high-pressure airflow 21 drives the back-blowing auxiliary pipe 14 to rotate around the back-blowing main pipe 8, so that the high-pressure airflow 21 blown by the back-blowing auxiliary pipe 14 covers the entire circumference of the filter element 16, achieving the effect of quickly cleaning the entire surface of the filter element 16. After cleaning, the air supply line is closed by controlling the pulse control valve 2. At this time, the air outlet 22 at the upper end of the back-blowing main pipe 8 stops spraying air. Under the reset action of the spring 13, the back-blowing cover plate 12 moves upward, opening the outlet at the top of the filter element 16. At this time, the fan operates normally and continues to draw air from the filter element 16.

[0040] This utility model's rotary backflushing filter uses high-pressure airflow through a backflushing auxiliary pipe to backflush the filter element from the inside out. The high-pressure airflow outlet is close to the filter element, resulting in a better backflushing effect. At the same time, the backflushing auxiliary pipe can rotate, enabling it to clean the entire inner surface of the filter element. During backflushing, the upper backflushing cover plate covers the filter element outlet, thereby avoiding the influence of the fan's suction on the high-pressure backflushing gas and improving the backflushing cleaning effect on the filter element.

[0041] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this utility model and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

Claims

1. A rotary backflushing filter device, characterized in that, include: The gas supply assembly includes a gas reservoir and a pulse control valve connected to the gas reservoir, wherein the pulse control valve is connected to a gas supply pipeline. The backflush assembly includes a backflush main pipe and a plurality of backflush auxiliary pipes arranged in the circumferential direction of the backflush main pipe. The backflush main pipe is connected to the backflush auxiliary pipes and the air supply pipeline in the air supply assembly. Each backflush auxiliary pipe is provided with air outlets arranged in a row. The backflush auxiliary pipes spray high-pressure airflow from the inside to the outside onto the filter element through the air outlets. The backflush auxiliary pipes can rotate around the center of the backflush main pipe. The baffle assembly includes a backflush cover plate that is movably mounted on the upper end of the backflush main pipe via an elastic structure. The upper end of the backflush main pipe is provided with an air outlet. The backflush main pipe sprays air through the air outlet, causing the backflush cover plate to press down and close the upper opening of the filter element. When the air outlet of the backflush main pipe stops spraying air, the backflush cover plate resets via the elastic structure to open the upper opening of the filter element.

2. The rotary backflushing filter device according to claim 1, characterized in that, The inlet of the pulse control valve is connected to the air reservoir, and the outlet is connected to the air supply pipeline. The air supply pipeline is connected to the inlet of multiple backflush main pipes.

3. The rotary backflushing filter device according to claim 1, characterized in that, The upper end of the backflush main pipe is equipped with a backflush fixing bracket, which has a three-claw support structure.

4. The rotary backflushing filter device according to claim 1, characterized in that, The backflush auxiliary pipe is provided in two parts, which are symmetrically arranged on both sides of the backflush main pipe. The high-pressure airflows ejected from the two backflush auxiliary pipes are in opposite directions and are sprayed at an angle towards the inner wall of the filter element.

5. A rotary backflushing filter device according to claim 4, characterized in that, Each backflush auxiliary pipe is connected to an upper horizontal pipe at its upper end. A round hole seat is installed on the backflush main pipe between the two upper horizontal pipes. The round hole seat has an airflow channel that communicates with the backflush main pipe. A bearing and a sealing ring are installed inside the round hole seat. The backflush auxiliary pipe is installed on the bearing and sealed by the sealing ring. The backflush auxiliary pipe enters the backflush main pipe through the airflow channel of the upper horizontal pipe and the round hole seat. The upper, middle and lower ends of each backflush auxiliary pipe are rotatably connected to the backflush main pipe through bearings.

6. A rotary backflushing filter device according to claim 1 or 4, characterized in that, The distance between the air inlet on the backflush auxiliary pipe and the inner wall of the filter element is 5-10mm.

7. A rotary backflushing filter device according to claim 1, characterized in that, The elastic structure includes an upper sleeve installed on the upper end of the backflush main pipe and a spring connected to the upper sleeve. The spring is fitted on the backflush main pipe, and the upper end of the spring is connected to the upper sleeve. The backflush cover is annular, fitted on the spring, and the middle part of the backflush cover is connected to the spring. The backflush cover moves up and down along the backflush main pipe together with the spring.

8. A rotary backflushing filter device according to claim 7, characterized in that, The upper sleeve is fitted onto the backflush main pipe. The upper end of the upper sleeve is sealed and the lower end is open. The air outlet is located on the backflush main pipe inside the upper sleeve. The air jet from the air outlet is sprayed from the lower end opening of the upper sleeve onto the backflush cover plate, pushing the backflush cover plate downward to close the upper opening of the filter element.

9. A rotary backflushing filter device according to claim 1, characterized in that, The main backflush pipe is arranged coaxially with the filter element, and the lower end of each auxiliary backflush pipe extends into the interior of the filter element and extends to the bottom of the filter element.

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