Air filter device for atmospheric pollution prevention

Abstract

The application relates to the technical field of air purification, in particular to an air filter device for air pollution prevention and treatment, which comprises a casing, a mounting hoop and a plurality of through grooves arranged on the outer side of the casing, the inner side of the casing is provided with a plurality of arc-shaped plates, the plurality of arc-shaped plates form a cylinder, the outer side of the plurality of arc-shaped plates is provided with flexible filter plates connected with each other, the inner side of the plurality of arc-shaped plates is provided with a filter adjusting mechanism, the inner side of the casing is provided with a scraping and cleaning mechanism, and a storage tank is movably arranged at the bottom of the casing. The air filter device for air pollution prevention and treatment is driven by the filter adjusting mechanism to deform the arc-shaped plates, drives the flexible filter plates connected with each other to synchronously stretch and shrink, the filtering area can be increased when the pollution concentration suddenly increases, the filtering speed is prevented from being too fast, the pressure drop is prevented from sharply rising and the filtering efficiency is prevented from decreasing, the area is reduced when the concentration is low, the filtering capacity redundancy is reduced, the energy consumption and operation and maintenance cost are reduced, and the filtering demand under different environments is adapted.

Description

An air purifier device for air pollution control Technical Field

[0001] This invention relates to the field of air purification technology, specifically to an air filter device for air pollution control. Background Technology

[0002] Industrial production processes generate large amounts of pollutants such as dust and harmful gases. These pollutants not only cause serious damage to the environment, but also affect the normal operation and service life of industrial equipment. For example, in equipment such as generator sets, air compressors, and construction machinery, dust entering precision parts increases wear, reduces equipment performance, and may even lead to equipment failure. Therefore, in order to protect industrial equipment and improve production efficiency, air filter devices are needed to filter impurities in the air.

[0003] Existing air filtration devices for air pollution control generally cannot dynamically adjust the filtration area of ​​the filter canister according to environmental changes. This limitation significantly affects the adaptability and operating efficiency of the device. When the pollution concentration rises sharply, the fixed filtration area can easily lead to excessively fast filtration speed and a sudden increase in filtration load, causing a surge in pressure drop and a decrease in filtration efficiency. When the pollution concentration is low, it will cause redundant filtration capacity, increasing energy consumption and operation and maintenance costs. The problem of insufficient adaptability is prominent.

[0004] However, existing devices mostly use an integrated rigid structure for their filter cartridges. The rigid integration of the filter material and the cartridge body makes it difficult to increase or decrease the filtration area in real time through modular combination or dynamic deployment. Therefore, we propose an air filter device for atmospheric pollution control. Summary of the Invention

[0005] One of the technical problems to be solved in this application is: how to design an air filter device for air pollution control that can dynamically adjust the filtration efficiency of the filter cartridge according to the pollution concentration.

[0006] To solve the above-mentioned technical problems, this application provides an air filter device for air pollution control, including a housing, a mounting clamp, and multiple through slots opened on the outside of the housing. The device is characterized in that: multiple arc-shaped plates are arranged on the inner side of the housing, forming a cylinder; flexible filter plates connected to each other are arranged on the outer sides of the arc-shaped plates; a filter adjustment mechanism is arranged on the inner side of the arc-shaped plates to drive the multiple arc-shaped plates to deform, thereby controlling the filtration area; a scraping and cleaning mechanism is arranged on the inner side of the housing to scrape away dust from the outer sides of the multiple flexible filter plates; and a storage tank is movably arranged at the bottom of the housing.

[0007] The filter adjustment mechanism includes a support frame disposed inside the housing. A rotating ring is movably disposed on the side of the support frame and movably connected to the bottom of the arc plate. A straight plate is disposed inside the rotating ring. An electric rotating disk is disposed on the side of the straight plate. A T-shaped groove is opened on the top of the straight plate. A T-shaped block is movably disposed inside the T-shaped groove.

[0008] The top of the T-shaped block is provided with a fixing clip that connects to the inner side of the arc-shaped plate. A rotating plate is movably provided on the inner side of the fixing clip. A connecting rod is provided on the side of the rotating plate. A rotating seat is provided at the end of the connecting rod. An installation clip is movably sleeved on the outer side of the rotating seat.

[0009] The top of the electric rotating disk is provided with a spline shaft, and a spline sleeve is movably sleeved on the outside of the spline shaft. The side of the mounting clamp is located on the outside of the spline sleeve, and a vertical rod is provided at the top of the spline shaft.

[0010] In some embodiments, the top of the storage tank is provided with a threaded cylinder, the bottom of the housing is provided with a threaded circular groove that is threadedly connected to the outer side of the threaded cylinder, and a collection cylinder is provided on the inner side of the threaded circular groove.

[0011] In some embodiments, a side plate is provided on the outer side of the spline sleeve, a shaped rod is provided on the top of the side plate, a wing plate is provided at the top of the shaped rod, a frustum column is provided on the inner side of the wing plate, a threaded rod is rotatably provided at the top of the frustum column, the outer thread of the threaded rod is threaded inside the housing, and a knob is provided at the top of the threaded rod.

[0012] In some embodiments, an installation ring is sleeved on the outer side of the vertical rod, two pull rods are provided at the top of the installation ring, a connecting ring is provided at the top of the two pull rods, and an inclined block is movably provided on the inner side of the connecting ring, with the inclined surface of the inclined block movably provided on the outer side of the frustum column.

[0013] In some embodiments, a straight rod is provided on the side of the inclined block, and a fixing block is provided through a connecting ring at one end of the straight rod. The side of the fixing block is provided on the inner side of the arc-shaped plate, and a tension spring is sleeved on the outer side of the straight rod. A connecting groove is provided on one side of the arc-shaped plate, and an arc-shaped sliding plate is provided on the other side of the arc-shaped plate. The outer side of the arc-shaped sliding plate is movably disposed inside the corresponding connecting groove.

[0014] In some embodiments, the scraping cleaning mechanism includes a slide rail disposed inside the housing, a lead screw rotatably disposed inside the slide rail, a motor disposed through the lead screw inside the slide rail, a base of the motor disposed on the side of the slide rail, and a slider threaded on the outside of the lead screw, the slider being movably disposed inside the slide rail.

[0015] In some embodiments, a fixing rod is provided at the top of the slider, a scraper is sleeved on the outside of the fixing rod, and a brush plate is sleeved on the outside of the fixing rod. The scraper and the brush plate are on the same plane and fit tightly together.

[0016] The present invention has at least the following beneficial effects:

[0017] 1. The set filter adjustment mechanism drives the arc plate to deform, which drives the interconnected flexible filter plates to expand and contract synchronously. When the pollution concentration rises sharply, the filtration area can be increased to avoid excessively fast filtration speed, pressure drop spikes and decreased filtration efficiency. When the concentration is low, the area is reduced to reduce filtration capacity redundancy, reduce energy consumption and maintenance costs, and adapt to the filtration needs in different environments.

[0018] 2. The scraping and cleaning mechanism inside the housing is driven by a motor to rotate the lead screw, which moves the slider, scraper, and brush plate. It can scrape off the dust accumulated on the outside of the flexible filter plate in real time. The storage tank connected to the bottom thread collects the dust. There is no need to stop the machine frequently for disassembly and cleaning, which reduces the amount of manual maintenance, prevents the filter material from failing due to dust accumulation, extends its service life, and reduces replacement costs.

[0019] 3. The curved plates are connected by the cooperation of the curved sliding plate and the connecting groove to ensure the sealing and integrity of the filter structure during deformation. The spline shaft, inclined block and other components of the filter adjustment mechanism are precisely driven, making the area adjustment process stable and controllable. The storage tank adopts a threaded connection, which is convenient for quick disassembly and cleaning. The overall structure takes into account both filtration performance and ease of operation. Attached Figure Description

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is a schematic cross-sectional view of the housing of the present invention;

[0022] Figure 3 is a schematic diagram of the filter adjustment mechanism and the scraping cleaning mechanism of the present invention;

[0023] Figure 4 is a schematic diagram of the flexible filter plate, arc plate, support frame and rotating ring of the present invention;

[0024] Figure 5 is a partial structural schematic diagram of the threaded rod, frustum column, wedge block and connecting ring of the present invention;

[0025] Figure 6 is a partial structural schematic diagram of the spline sleeve, spline shaft, electric rotating disk and straight plate of the present invention;

[0026] Figure 7 is an exploded structural diagram of the straight plate, fixing clamp, rotating plate and spline sleeve of the present invention;

[0027] Figure 8 is a schematic diagram of the scraper, brush plate and slide rail of the present invention;

[0028] Figure 9 is a partial structural schematic diagram of the slide rail, motor, lead screw and scraper of the present invention.

[0029] In the diagram: 1. Housing; 2. Through groove; 3. Mounting clamp; 4. Storage tank; 5. Collection cylinder; 6. Threaded circular groove; 7. Threaded cylinder; 8. Filter adjustment mechanism; 81. Knob; 82. Threaded rod; 83. Rotating ring; 84. Support frame; 85. Connecting groove; 86. Arc-shaped sliding plate; 87. Fixing block; 88. Straight rod; 89. Tension spring; 810. Connecting ring; 811. Inclined block; 812. Pull rod; 813. Mounting ring; 814. Vertical rod; 815. Frustum column; 816. Wing plate; 817. Irregular rod 818. Splined shaft; 819. Straight plate; 820. Electric rotating disk; 821. Splined sleeve; 822. Side plate; 823. Fixing clamp; 824. Rotating plate; 825. Connecting rod; 826. Mounting clamp; 827. Rotating seat; 828. T-block; 829. T-slot; 9. Flexible filter plate; 10. Scraping cleaning mechanism; 101. Scraper; 102. Brush plate; 103. Slide rail; 104. Fixing rod; 105. Motor; 106. Slider; 107. Lead screw; 11. Arc plate. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1: Please refer to Figures 1-9. The present invention provides a technical solution: an air filter device for atmospheric pollution control, including a housing 1, a mounting clamp 3, and multiple through slots 2 opened on the outside of the housing 1. Multiple arc-shaped plates 11 are provided on the inside of the housing 1, forming a cylinder. Flexible filter plates 9 are connected to each other on the outside of the multiple arc-shaped plates 11. A filter adjustment mechanism 8 is provided on the inside of the multiple arc-shaped plates 11 to drive the multiple arc-shaped plates 11 to deform, thereby controlling the filter area. A scraping and cleaning mechanism 10 is provided on the inside of the housing 1 to scrape off the dust on the outside of the multiple flexible filter plates 9. A storage tank 4 is movably provided at the bottom of the housing 1.

[0032] The housing 1 serves as the basic frame of the device. Multiple through slots 2 on the outside provide channels for air circulation. Multiple arc-shaped plates 11 are spliced ​​together on the inside to form a sealed cylinder. The arc-shaped sliding plate 86 on one side of the arc-shaped plate 11 is movably fitted with the connecting slot 85 of the adjacent arc-shaped plate 11, which not only ensures the sealing of the initial structure, but also reserves space for the deformation of the arc-shaped plate 11. The flexible filter plates 9 connected to each other on the outside rely on the arc-shaped plates 11 to form the filter body. The mounting clamp 3 can securely assemble the device onto the equipment or pipeline.

[0033] The storage tank 4 has a threaded cylinder 7 at its top, and the bottom of the housing 1 has a threaded groove 6 that connects to the outer side of the threaded cylinder 7. A collection cylinder 5 is located inside the threaded groove 6. The threaded groove 6 at the bottom of the housing 1 is threadedly connected to the threaded cylinder 7 at the top of the storage tank 4, allowing for easy and quick installation and disassembly with just a rotation operation. The inner collection cylinder 5 features an arc-shaped inner wall design, conforming to the dust's falling trajectory, guiding the scraped dust smoothly into the storage tank 4, reducing dust adhesion and clogging, and improving collection efficiency.

[0034] The filter adjustment mechanism 8 includes a support frame 84 disposed inside the housing 1. A rotating ring 83 is movably disposed on the side of the support frame 84 and movably connected to the bottom of the arc plate 11. A straight plate 819 is disposed inside the rotating ring 83. An electric rotating disk 820 is disposed on the side of the straight plate 819. A T-slot 829 is opened on the top of the straight plate 819. A T-block 828 is movably disposed inside the T-slot 829. The straight plate 819 is installed through the rotating ring 83. The T-slot 829 at the top cooperates with the T-block 828 to restrict the fixing clamp 823 to slide only along the groove direction, so as to avoid the displacement when the arc plate 11 is deformed, and to provide precise motion guidance for the adjustment of the filter area.

[0035] The top of the T-block 828 is provided with a fixing clip 823 that connects to the inner side of the arc plate 11. A rotating plate 824 is movably provided on the inner side of the fixing clip 823. A connecting rod 825 is provided on the side of the rotating plate 824. A rotating seat 827 is provided at the end of the connecting rod 825. A mounting clip 826 is movably sleeved on the outer side of the rotating seat 827. The fixing clip 823 is connected to the inner side of the arc plate 11. The rotating plate 824 on its inner side can rotate flexibly. It cooperates with the rotating seat 827 at the end of the connecting rod 825 to movably engage with the mounting clip 826, so that when the arc plate 11 is driven to deform, it can adapt to the position change by adjusting the angle of the rotating plate 824 and the rotating seat 827.

[0036] A splined shaft 818 is provided at the top of the electric rotating disk 820. A splined sleeve 821 is movably sleeved on the outside of the splined shaft 818. The side of the mounting clamp 826 is provided on the outside of the splined sleeve 821. A vertical rod 814 is provided at the top of the splined shaft 818. The splined shaft 818 and the splined sleeve 821 adopt a sliding fit structure with keyway engagement. When the splined shaft 818 rotates with the electric rotating disk 820, it can drive the splined sleeve 821 to rotate synchronously through key gear transmission. At the same time, the splined sleeve 821 can slide along the axial direction of the splined shaft 818 to meet the needs of the irregular rod 817 to drive its lifting and lowering, and realize the dual functions of torque transmission and axial movement.

[0037] A side plate 822 is provided on the outer side of the spline sleeve 821. A special-shaped rod 817 is provided on the top of the side plate 822. A wing plate 816 is provided on the top of the special-shaped rod 817. A frustum column 815 is provided on the inner side of the wing plate 816. A threaded rod 82 is rotatably provided on the top of the frustum column 815. The outer thread of the threaded rod 82 is provided inside the housing 1. A knob 81 is provided on the top of the threaded rod 82.

[0038] The inclined surface of the truncated column 815 fits into the inclined surface of the inclined block 811. During lifting, the inclined surface can push the inclined block 811 to slide radially along the connecting ring 810, converting the linear motion of the threaded rod 82 into the radial motion of the inclined block 811, thus providing driving force for the deformation of the arc plate 11.

[0039] An installation ring 813 is fitted on the outer side of the vertical rod 814. Two pull rods 812 are provided at the top of the installation ring 813. A connecting ring 810 is provided at the top of the two pull rods 812. An inclined block 811 is movably provided on the inner side of the connecting ring 810. The inclined surface of the inclined block 811 is movably provided on the outer side of the frustum column 815.

[0040] A straight rod 88 is provided on the side of the inclined block 811. One end of the straight rod 88 passes through the connecting ring 810 and is provided with a fixing block 87. The side of the fixing block 87 is provided on the inner side of the arc plate 11. A tension spring 89 is sleeved on the outer side of the straight rod 88. A connecting groove 85 is opened on one side of the arc plate 11. An arc-shaped sliding plate 86 is provided on the other side of the arc plate 11. The outer side of the arc-shaped sliding plate 86 is movably disposed inside the corresponding connecting groove 85.

[0041] The straight rod 88 on the side of the inclined block 811 passes through the connecting ring 810. The tension spring 89 sleeved on the outside can pull the inclined block 811 back to its original position when the truncated cone column 815 rises and releases the compression, thereby causing the arc plate 11 to contract and realize bidirectional adjustment of the filtration area. The elastic force of the tension spring 89 can also ensure that the inclined block 811 and the inclined surface of the truncated cone column 815 are always in close contact.

[0042] Example 2: Please refer to Figures 8-9. The present invention provides a technical solution: the scraping cleaning mechanism 10 includes a slide rail 103 disposed inside the housing 1. A lead screw 107 is rotatably disposed inside the slide rail 103. A motor 105 is disposed through the lead screw 107 inside the slide rail 103. The base of the motor 105 is disposed on the side of the slide rail 103. A slider 106 is threaded on the outside of the lead screw 107. The slider 106 is movably disposed inside the slide rail 103.

[0043] When the motor 105 drives the lead screw 107 to rotate, the slider 106 connected by the outer thread is restricted to linear motion by the slide rail 103. The screw transmission principle ensures that the slider 106 moves accurately and smoothly, providing stable motion power and trajectory guidance for the cleaning components.

[0044] A fixing rod 104 is provided on the top of the slider 106. A scraper 101 is sleeved on the outside of the fixing rod 104, and a brush plate 102 is sleeved on the outside of the fixing rod 104. The scraper 101 and the brush plate 102 are on the same plane and fit tightly together.

[0045] Working principle: When using this device, if the concentration of pollutants in the air changes, the knob 81 can be rotated. The knob 81 will drive the threaded rod 82 to rotate, causing it to move up and down. At this time, the frustum 815 at the bottom of the threaded rod 82 will move. Since the outer side of the frustum 815 is inclined, it will press against the inclined block 811, causing the inclined block 811 to drive the straight rod 88 to slide inside the connecting ring 810, and causing the tension spring 89 to deform. At this time, the straight rod... 88 will drive the fixed block 87 to move, the fixed block 87 will drive the corresponding arc plate 11 to move, and when the arc plate 11 moves, it will drive the arc plate 86 on the side to slide inside the arc plate 86 on the inner side of the adjacent arc plate 11. Multiple flexible filter plates 9 will open or close, which can be based on actual needs. While moving the frustum column 815, the frustum column 815 will drive the wing plate 816 to move, so that the wing plate 816 drives the irregular rod 817 set at the bottom to move.

[0046] When the irregular rod 817 moves, it will drive the side plate 822 to move. The side plate 822 will drive the inner spline sleeve 821 to slide on the outer surface of the spline shaft 818. The spline sleeve 821 will drive the outer mounting clip 826 to move. The mounting clip 826 will drive the rotating seat 827 and the connecting rod 825 to move, causing the rotating seat 827 to rotate. When the rotating seat 827 rotates, it will drive the rotating plate 824 and the fixing clip 823 to slide on the top of the straight plate 819, causing the fixing clip 823 to drive the T-block 828 to slide on the inner side of the T-slot 829. At this time, the fixing clip 823, like the fixing block 87, will drive the arc plate 11 and the flexible filter plate 9 to work.

[0047] When it is necessary to scrape off the dust on the outer surface of the flexible filter plate 9, the electric rotating disk 820 is started, which drives the straight plate 819 and the fixing clamp 823 to rotate. The fixing clamp 823 will drive the flexible filter plate 9 to rotate. At this time, the motor 105 is started, and the output end of the motor 105 drives the lead screw 107 to rotate. The lead screw 107 will drive the slider 106 to slide on the inner side of the slide rail 103, so that the slider 106 drives the fixing rod 104 to move. The fixing rod 104 will drive the brush plate 102 and the scraper 101 to move closer to the outer side of the flexible filter plate 9, thereby completing the scraping. The scraper 101 is rigid first, and then the brush plate 102 performs flexible scraping.

[0048] The falling dust enters the inside of the collection cylinder 5. The arc-shaped design of the inner side of the collection cylinder 5 allows the dust to fall into the storage tank 4. When the storage tank 4 needs cleaning, rotating it causes the threaded cylinder 7 to rotate inside the threaded groove 6, thus allowing the storage tank 4 to be removed.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. An air filter device for air pollution control, comprising a housing (1), a mounting clamp (3), and a plurality of through slots (2) formed on the outside of the housing (1), characterized in that: The inner side of the housing (1) is provided with multiple arc-shaped plates (11), which form a cylinder. Flexible filter plates (9) are connected to each other on the outer side of the multiple arc-shaped plates (11). A filter adjustment mechanism (8) is provided on the inner side of the multiple arc-shaped plates (11) to drive the multiple arc-shaped plates (11) to deform, thereby controlling the filter area. A scraping and cleaning mechanism (10) is provided on the inner side of the housing (1) to scrape off the dust on the outer side of the multiple flexible filter plates (9). A storage tank (4) is movably provided at the bottom of the housing (1). The filter adjustment mechanism (8) includes a support frame (84) provided on the inner side of the housing (1). A rotating ring (83) is movably provided on the side of the support frame (84) and movably connected to the bottom of the arc-shaped plates (11). A straight plate (819) is provided on the inner side of the rotating ring (83). An electric rotating mechanism is provided on the side of the straight plate (819). The plate (820) has a T-slot (829) on its top, and a T-block (828) is movably arranged inside the T-slot (829). A fixing clip (823) is provided on the top of the T-block (828) and connected to the inner side of the arc-shaped plate (11). A rotating plate (824) is movably arranged inside the fixing clip (823). A connecting rod (825) is provided on the side of the rotating plate (824). The end of the rod (825) is provided with a rotating seat (827), and the outer side of the rotating seat (827) is movably fitted with a mounting clip (826); the top of the electric rotating disk (820) is provided with a spline shaft (818), the outer side of the spline shaft (818) is movably fitted with a spline sleeve (821), the side of the mounting clip (826) is provided on the outer side of the spline sleeve (821), and the top of the spline shaft (818) is provided with a vertical rod (814).

2. The air filter device for air pollution control according to claim 1, characterized in that: The storage tank (4) is provided with a threaded cylinder (7) at the top, and the bottom of the housing (1) is provided with a threaded groove (6) that is threaded to the outside of the threaded cylinder (7). A collection cylinder (5) is provided on the inside of the threaded groove (6).

3. The air filter device for air pollution control according to claim 1, characterized in that: The spline sleeve (821) has a side plate (822) on its outer side, a special-shaped rod (817) on the top of the side plate (822), a wing plate (816) on the top of the special-shaped rod (817), a frustum column (815) on the inner side of the wing plate (816), a threaded rod (82) rotatably provided on the top of the frustum column (815), the outer thread of the threaded rod (82) is provided inside the housing (1), and a knob (81) is provided on the top of the threaded rod (82).

4. The air filter device for air pollution control according to claim 3, characterized in that: An installation ring (813) is sleeved on the outer side of the vertical rod (814). Two pull rods (812) are provided at the top of the installation ring (813). A connecting ring (810) is provided at the top of the two pull rods (812). An inclined block (811) is movably provided on the inner side of the connecting ring (810). The inclined surface of the inclined block (811) is movably provided on the outer side of the frustum column (815).

5. The air filter device for air pollution control according to claim 4, characterized in that: A straight rod (88) is provided on the side of the inclined block (811). One end of the straight rod (88) passes through the connecting ring (810) and is provided with a fixing block (87). The side of the fixing block (87) is provided on the inner side of the arc plate (11). A tension spring (89) is sleeved on the outer side of the straight rod (88). A connecting groove (85) is provided on one side of the arc plate (11). An arc-shaped sliding plate (86) is provided on the other side of the arc plate (11). The outer side of the arc-shaped sliding plate (86) is movably disposed inside the corresponding connecting groove (85).

6. The air filter device for air pollution control according to claim 1, characterized in that: The scraping and cleaning mechanism (10) includes a slide rail (103) disposed inside the housing (1). A lead screw (107) is rotatably disposed inside the slide rail (103). A motor (105) is disposed through the lead screw (107) inside the slide rail (103). The base of the motor (105) is disposed on the side of the slide rail (103). A slider (106) is threaded on the outside of the lead screw (107). The slider (106) is movably disposed inside the slide rail (103).

7. The air filter device for air pollution control according to claim 6, characterized in that: The top of the slider (106) is provided with a fixing rod (104), a scraper (101) is sleeved on the outside of the fixing rod (104), and a brush plate (102) is sleeved on the outside of the fixing rod (104). The scraper (101) and the brush plate (102) are on the same plane and fit tightly together.

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