Dust removal equipment of textile machinery

Abstract

The utility model relates to dust removal equipment for textile machinery, which comprises a mounting frame, the mounting frame is of a rectangular frame structure, a cleaning groove is arranged in the middle of the mounting frame, mounting grooves are respectively arranged on the left side and the right side of the mounting frame, and guide rollers are mounted on two sides of the upper end of the cleaning groove through pin shafts; the pressing unit is arranged above the mounting frame, the lower end of the pressing unit is in locking fit with the mounting groove, and the pressing unit is used for pressing the textile fabric downwards, so that the textile fabric is of a V-shaped structure in the cleaning groove; the cleaning and dedusting unit is detachably mounted at the lower end in the mounting frame and is used for cleaning and dedusting the lower end surface of the V-shaped textile fabric; according to the V-shaped cloth cleaning device, the pressing mechanism and the mounting frame are matched with each other, so that the cloth can generate V-shaped deformation, the cleaning contact area can be further increased, and meanwhile, in cooperation with mechanical vibration and airflow disturbance generated by the beating piece, deep impurities, which are difficult to treat by traditional equipment, in fiber gaps can be removed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of textile machinery, and particularly relates to a dust removal device of a textile machinery. BACKGROUND

[0002] In textile industrial production, textile scraps, lint and dust remaining on the surface of cloth can seriously affect subsequent printing and dyeing processes. Traditional dust removal devices mostly adopt flat scraper or fixed brush roller structures, and have the problems of limited contact area and incomplete cleaning, especially for deep-layer impurities remaining in the wrinkle of the fabric, which are difficult to effectively remove. Although the existing technology adopts a pressure roller type dust removal device, the contact between the cloth and the cleaning unit can be enhanced, but the following technical bottlenecks exist: (1) the rigid pressure mechanism is easy to cause excessive stretching of the cloth, resulting in fiber damage; (2) single-direction cleaning is difficult to synchronously process the pollutants on the front and back surfaces; (3) lacking pressure adjustment function, it is difficult to adapt to the dust removal needs of cloth of different thicknesses; (4) the efficiency of the scrap collecting system is low, and secondary pollution is easy to occur. CONTENT OF THE UTILITY MODEL

[0003] In order to solve the problems in the background art, the utility model provides a dust removal device of a textile machinery.

[0004] The dust removal device of the textile machinery provided in the application adopts the following technical scheme:

[0005] A dust removal device of a textile machinery, comprising a mounting frame in a rectangular frame structure, a cleaning groove is arranged in the middle of the mounting frame, mounting grooves are arranged on the left and right sides of the mounting frame, guide rollers are arranged on the upper ends of the two sides of the cleaning groove through pin shafts, and connecting seats are fixedly arranged at the left and right ends of the mounting frame; a pressure unit is arranged above the mounting frame, the lower end of the pressure unit is locked and matched with the mounting groove, and the pressure unit is used for pressing the textile cloth downward, so that the textile cloth is in a V-shaped structure in the cleaning groove; a cleaning and dust removal unit is detachably arranged at the lower end of the mounting frame, and the cleaning and dust removal unit is used for cleaning and dust removing the lower end surface of the V-shaped textile cloth.

[0006] Further, the pressure unit comprises a cross beam plate, a handle, a locking frame and a pressure mechanism, the cross beam plate is arranged above the mounting frame, the handle is symmetrically arranged at the upper end of the cross beam plate, the locking frame is fixedly arranged at the lower end of the cross beam plate, the locking frame is locked and matched with the mounting groove, and the pressure mechanism is fixedly arranged at the lower end of the cross beam plate.

[0007] Further, the pressing mechanism comprises a V-shaped frame, a pressing roller, a rectangular plate, a rotating roller and a beating piece, the V-shaped frame is fixedly installed at the lower end of the cross beam plate, a pressurizing cavity is arranged between the V-shaped frame and the cross beam plate, the pressing roller is installed at the lower end of the V-shaped frame through a pin shaft, rectangular grooves are formed on the two inclined surfaces of the V-shaped frame, the rectangular plate is fixedly installed on the rectangular grooves through screws, the beating piece is installed on the rectangular plate, the rotating roller is fixedly installed in the pressurizing cavity, and the rotating roller is used to drive the beating piece to reciprocatingly beat the surface of the cloth.

[0008] Further, the beating piece comprises a guide rod, an extension spring, a trapezoidal block, a beating plate and a protruding block, the rectangular plate is uniformly provided with through holes, the guide rod is slidably arranged on the through holes, the extension spring is arranged on the guide rod, the trapezoidal block is fixedly installed at the inner side end of the guide rod, the beating plate is fixedly installed between the outer side ends of the guide rod, the protruding block is installed on the rotating roller, and the protruding block and the trapezoidal block are matched with each other to drive the guide rod to reciprocate.

[0009] Further, the locking blocks are fixedly installed at the front and rear ends of the locking frame, the locking blocks are telescopic, and the clamping grooves matched with the locking blocks are uniformly arranged in the mounting grooves.

[0010] Further, the cleaning and dust removing unit comprises a U-shaped frame, a cleaning frame, a negative pressure cavity, a scraping piece, a collecting groove and a cleaning piece, the U-shaped frame is installed at the lower end in the interior of the mounting frame through screws, the cleaning frame is installed at the middle of the upper end of the U-shaped frame, the negative pressure cavity is arranged between the cleaning frame and the U-shaped frame, the arc-shaped grooves are symmetrically arranged on the inner side surfaces of the cleaning frame, the scraping pieces are installed in the arc-shaped grooves, the collecting grooves are uniformly arranged between the cleaning frame and the negative pressure cavity, the sliding grooves are arranged in the middle of the cleaning frame, and the cleaning pieces are fixedly installed in the sliding grooves.

[0011] Further, the scraping pieces are rubber rollers, and the rubber scraping pieces are uniformly arranged on the rubber rollers.

[0012] Further, the cleaning piece comprises a guide rail and a sliding frame, the guide rail is fixedly installed in the sliding groove, the sliding frame is slidably arranged on the guide rail, the flexible rubber is fixedly installed between the two ends of the sliding frame and the sliding groove, and the brush hairs are uniformly arranged on the upper end of the sliding frame.

[0013] Advantages

[0014] Compared with the prior art, the dust removing equipment for the textile machine has the following advantages:

[0015] 1. The pressing mechanism and the mounting frame are matched with each other, so that the cloth can be V-shapedly deformed, the cleaning contact area can be increased, the mechanical vibration and the airflow disturbance generated by the beating piece can be matched, and the deep impurities between the fibers which are difficult to be handled by traditional equipment can be removed.

[0016] 2、The utility model discloses, the different depth adjustment between locking frame and installation groove and the combination with the stepless speed change of rotating roller, and further can clean different types of fabric cloth, avoid the phenomenon that fabric is damaged.

[0017] 3、The utility model discloses, the multistage collaborative dust removal work of cleaning dust removal unit, and the rubber blade of scraping member can scrape the cloth reversely, and the elastic blade produces deformation and wraps fiber, and strips long nap, thread end and other large particle impurities, and the sliding frame of cleaning member reciprocates on the guide rail, and nylon brush hair sweeps with the cross trajectory, and removes the dust of surface static electricity adsorption, and the impurities scraped off enter the negative pressure chamber through the collection groove, and realize continuous suction through the vacuum system of external connection. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model is further illustrated below in connection with the drawings and examples.

[0019] Figure 1 It is the explosion map of the application.

[0020] Figure 2 It is the three-dimensional structure schematic diagram of the mounting frame of the application.

[0021] Figure 3 It is the three-dimensional structure schematic diagram of the compression unit of the application.

[0022] Figure 4 It is the cut structure schematic diagram of the compression unit of the application.

[0023] Figure 5 It is the cut structure schematic diagram of the cleaning dust removal unit of the application.

[0024] Figure 6 It is the cut structure schematic diagram of the cleaning dust removal unit of the application.

[0025] The drawing reference explains: 1, mounting frame;11, cleaning groove;12, installation groove;13, guide roller;14, connecting seat;2, compression unit;21, crossbeam board;22, handle;23, locking frame;231, locking block;24, compression mechanism;241, V-shaped frame;242, compression roller;243, rectangular plate;244, rotating roller;245, patting member;2451, guide rod;2452, extension spring;2453, trapezoidal block;2454, patting plate;2455, protruding block;3, cleaning dust removal unit;31, U-shaped frame;32, cleaning frame;33, negative pressure chamber;34, scraping member;35, collection groove;36, cleaning member;361, guide rail;362, sliding frame. DETAILED DESCRIPTION

[0026] Clearly and completely describe the technical solutions in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model, obviously, the described embodiments are only a part of the embodiments of the utility model, and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0027] Please refer to Figures 1-6 The utility model discloses a textile machinery's dust removal equipment, including mounting bracket 1, it is rectangular frame type structure, and the middle part of mounting bracket 1 is provided with cleaning groove 11, and the left and right sides of mounting bracket 1 are provided with mounting groove 12 respectively, and the both sides on the upper end of cleaning groove 11 are provided with guide roller 13 through pin shaft, and the both ends of mounting bracket 1 are fixedly provided with connecting seat 14, and the lower end of the pressing unit 2 is locked with the mounting groove 12, and the pressing unit 2 is used for pressing the textile fabric downward, so that the textile fabric is in V-shaped structure inside the cleaning groove 11, and the cleaning and dust removal unit 3 is detachably installed at the lower end inside the mounting bracket 1, and the cleaning and dust removal unit 3 is used for cleaning the lower end surface of V-shaped textile fabric.

[0028] In the above technical scheme, the mounting bracket 1 is installed on the textile machinery through the connecting seat 14, the fabric to be cleaned is moved above the mounting bracket 1, the pressing unit 2 can press the fabric downward, so that the fabric can move to the inside of the cleaning groove 11, and the textile fabric is in V-shaped structure, the guide roller 13 is used for guiding and conveying the fabric, and the deformed textile fabric can contact the upper end of the cleaning and dust removal unit 3, and the cleaning and dust removal unit 3 can clean the dust, textile debris and other impurities on the surface of the textile fabric, so as to prevent subsequent printing and dyeing of the fabric.

[0029] Please refer to Figures 1-2 As a preferred technical scheme of the embodiment, the pressing unit 2 includes a cross beam plate 21, a handle 22, a locking frame 23 and a pressing mechanism 24, the upper end of the cross beam plate 21 is symmetrically provided with the handle 22, the lower end of the cross beam plate 21 is fixedly provided with the locking frame 23, and the locking frame 23 is locked with the mounting groove 12, and the lower end of the cross beam plate 21 is fixedly provided with the pressing mechanism 24.

[0030] In the above technical scheme, when the textile fabric needs to be cleaned, the locking frame 23 is installed in the mounting groove 12 through the cross beam plate 21, and the pressing mechanism 24 can press the textile fabric, so that the textile fabric can be pressed into the cleaning groove 11 by the pressing mechanism 24, and the lower end of the textile fabric can contact the surface of the cleaning and dust removal unit 3, so that the cleaning and dust removal unit 3 can clean the surface of the textile fabric.

[0031] Referring to Figures 3-4 As shown in the preferred technical solution of the embodiment, the pressing mechanism 24 comprises a V-shaped frame 241, a pressing roller 242, a rectangular plate 243, a rotating roller 244 and a beating piece 245. The V-shaped frame 241 is fixedly installed at the lower end of the beam plate 21, and a pressurized cavity is arranged between the inside of the V-shaped frame 241 and the beam plate 21. The pressing roller 242 is installed at the lower end of the V-shaped frame 241 through a pin shaft. Rectangular grooves are formed on the two inclined surfaces of the V-shaped frame 241. The rectangular plate 243 is fixedly installed on the rectangular grooves through screws. The beating piece 245 is installed on the rectangular plate 243. The rotating roller 244 is fixedly installed in the pressurized cavity, and is used to drive the beating piece 245 to reciprocally beat the surface of the textile fabric.

[0032] In the above technical solution, when the beam plate 21 is installed, the V-shaped frame 241 drives the pressing roller 242 to press the textile fabric, so that the textile fabric can be deformed in the cleaning groove 11. The rotating roller 244 and the beating piece 245 cooperate with each other, so that the beating piece 245 reciprocally beats the surface of the textile fabric. The debris and impurities remaining in the textile fabric can be cleaned, and the subsequent printing and dyeing effect of the textile fabric is improved.

[0033] Referring to Figure 4 As shown in the preferred technical solution of the embodiment, the beating piece 245 comprises a guide rod 2451, an extension spring 2452, a trapezoidal block 2453, a beating plate 2454 and a protruding block 2455. The rectangular plate 243 is uniformly provided with through holes. The guide rod 2451 is slidingly arranged on the through holes. The extension spring 2452 is arranged on the guide rod 2451. The trapezoidal block 2453 is fixedly installed at the inside end of the guide rod 2451. The beating plate 2454 is fixedly installed between the outside of the guide rod 2451. The protruding block 2455 is installed on the rotating roller 244, and cooperates with the trapezoidal block 2453 to drive the guide rod 2451 to reciprocally move.

[0034] In the above technical solution, the rotating roller 244 can drive the protruding block 2455 to synchronously rotate. When the protruding block 2455 rotates, the protruding block 2455 can extrude the trapezoidal block 2453, so that the trapezoidal block 2453 can drive the guide rod 2451 to outwardly extend. The guide rod 2451 can in turn drive the beating plate 2454 to beat the surface of the textile fabric, which is beneficial to accurately clean the textile debris and dust.

[0035] Referring to Figures 3-4 As shown in the preferred technical solution of the embodiment, the locking frame 23 is fixedly installed with locking blocks 231 at the front and rear ends. The locking blocks 231 are telescopic. The clamping grooves matched with the locking blocks 231 are uniformly arranged in the installation groove 12.

[0036] In the above technical scheme, by changing the locking block 231 and the locking groove at different positions, the height of the locking frame 23 can be adjusted, so that the pressing mechanism 24 can adjust the deformation of the cloth, thereby adjusting the contact force between the textile cloth and the cleaning and dust removal unit 3, and preventing the cloth from being damaged during cleaning.

[0037] Referring to Figures 5-6 As shown in the preferred technical scheme of the present embodiment, the cleaning and dust removal unit 3 comprises a U-shaped frame 31, a cleaning frame 32, a negative pressure cavity 33, a scraping piece 34, a collection groove 35 and a cleaning piece 36. The U-shaped frame 31 is installed at the lower end of the installation frame 1 by screws, the cleaning frame 32 is installed at the upper end of the U-shaped frame 31, the negative pressure cavity 33 is arranged between the cleaning frame 32 and the U-shaped frame 31, the arc-shaped grooves are symmetrically arranged on the inner side of the cleaning frame 32, the scraping piece 34 is installed in the arc-shaped grooves, the collection grooves 35 are evenly arranged between the cleaning frame 32 and the negative pressure cavity 33, the sliding groove is arranged in the middle of the cleaning frame 32, and the cleaning piece 36 is fixedly installed in the sliding groove.

[0038] In the above technical scheme, when the textile cloth moves in the cleaning frame 32, the scraping piece 34 can scrape the loose fiber debris and lint on the surface of the textile cloth, the cleaning piece 36 can brush the surface of the textile cloth, the cleaning piece 36 can further clean the impurities on the surface of the cloth, the cleaned impurities can enter the negative pressure cavity 33 through the collection groove 35, and the pressure between the scraping piece 34 and the cleaning piece 36 and the textile cloth can be adjusted by adjusting the pressing distance of the pressing mechanism 24, so as to avoid excessive friction and damage to the cloth.

[0039] Referring to Figures 5-6 As shown in the preferred technical scheme of the present embodiment, the scraping piece 34 is a rubber roller, and the rubber scraping pieces are evenly arranged on the rubber roller.

[0040] In the above technical scheme, the rubber scraping pieces are soft and elastic, and compared with hard tools (such as metal scrapers), the physical damage to textile fibers can be effectively reduced, especially for delicate fabrics such as silk and cashmere, to avoid pilling, hooking or surface scratches caused by scraping. The elasticity of the rubber enables it to adapt to the concave and convex surface of the cloth, evenly distribute the pressure, and avoid local overloading and fiber breakage.

[0041] Referring to Figures 5-6 As shown in the preferred technical scheme of the present embodiment, the cleaning piece 36 comprises a guide rail 361 and a sliding frame 362, the guide rail 361 is fixedly installed in the sliding groove, the sliding frame 362 is slidably arranged on the guide rail 361, the flexible rubber is fixedly installed between the two ends of the sliding frame 362 and the sliding groove, and the brush hairs are evenly arranged on the upper end of the sliding frame 362.

[0042] In the technical scheme, the sliding frame 362 can reciprocate along the length direction of the sliding rail 361, and the brush on the sliding frame 362 can brush in the direction perpendicular to the movement direction of the textile fabric, so that the cleaning effect of the textile fabric is improved, the surface of the fabric to be printed and dyed is ensured to be clean and free of dirt, and the subsequent printing and dyeing effect of the fabric is improved.

[0043] The working principle of the utility model is:

[0044] S1, cloth deformation and pre-positioning

[0045] The mounting frame 1 is fixed on the textile machinery transmission track through the connecting seat 14, and the cloth to be processed is guided into the cleaning groove through the guide roller 13. The operator embeds the locking frame 23 of the pressing unit 24 into the mounting groove special clamping by the handle 22, adjusts the meshing height of the locking block 13 and the clamping groove according to the cloth thickness. During the pressing process, the pressing roller 242 of the V-shaped frame 241 presses the cloth into the cleaning groove 11 to form a stable V-shaped structure, at this time, the cloth forms an inclination angle of 55°-65° with the horizontal plane, and the contact area is effectively increased.

[0046] S2, dynamic beating cleaning

[0047] When the rotating roller 244 rotates, the protruding block 2455 periodically extrudes the trapezoidal block 2453. Under the slope transmission of the protruding block 2455 and the trapezoidal block 2453, the guide rod 2451 overcomes the resistance of the extension spring 2452 and extends outward, so that the beating plate 2454 impacts the cloth surface at a frequency of 20-30 times / s. This high-frequency beating produces two effects: 1. Mechanical vibration makes the impurities with weak inter-fiber bonding force separate; 2. Local airflow disturbance is formed to promote the lifting of debris. Tests have shown that the beating system can remove particles as small as 50μm.

[0048] S3, multi-stage cooperative dust removal

[0049] The V-shaped concave cloth passes through three cleaning stations in turn:

[0050] Scraping station: two groups of rubber wipers scrape the cloth in the opposite direction with a contact pressure of 3-5N, the elastic wipers deform to wrap the fibers, and the long nap, thread ends and other large particle impurities are stripped;

[0051] Brushing station: the sliding frame 362 of the cleaning piece 36 makes reciprocating motion on the guide rail 361 with an amplitude of ±15mm, and the nylon brush bristles brush in a cross trajectory to remove the dust adsorbed on the surface by static electricity;

[0052] Negative pressure collection: the scraped impurities enter the negative pressure cavity 33 through the collection groove 35, and are continuously sucked through the external vacuum system (-5kPa to-8kPa), so that the dust removal efficiency is high.

[0053] S4, self-adaptive adjustment mechanism

[0054] When processing delicate fabrics such as silk, the pressure of the press roller is reduced to 1.2-1.8 N by raising the height of the locking frame 23, and the contact area of the material scraping member 34 with the fabric is reduced by 40%, avoiding damage to the fibers; for heavy canvas, the pressure is increased to 4.5-5.5 N, and the beating member 245 is activated to the boost mode, and the rotating speed of the rotating roller is increased to 120 rpm, ensuring the removal of deep impurities. The adjustment process can be completed within 10 seconds without the need to change tools.

[0055] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

Claims

1. A dust removal apparatus of a textile machine, characterized in that, Include: The mounting frame (1) is in a rectangular frame structure, and a cleaning groove (11) is arranged in the middle of the mounting frame (1). The left and right sides of the mounting frame (1) are respectively provided with mounting grooves (12). The upper end of the cleaning groove (11) is provided with guide rollers (13) on both sides through a pin shaft. The left and right ends of the mounting frame (1) are fixedly provided with connecting seats (14). The pressing unit (2) is arranged above the mounting frame (1), and the lower end of the pressing unit (2) is locked and matched with the mounting groove (12). The pressing unit (2) is used for pressing the textile fabric downward, so that the textile fabric is in a V-shaped structure inside the cleaning groove (11). The cleaning and dust removal unit (3) is detachably mounted at the lower end inside the mounting frame (1). The cleaning and dust removal unit (3) is used for cleaning and dust removal of the lower end surface of the V-shaped textile fabric.

2. A dust extraction apparatus for a textile machine according to claim 1, characterised in that: The pressing unit (2) includes a cross beam plate (21), a handle (22), a locking frame (23) and a pressing mechanism (24). The cross beam plate (21) is arranged above the mounting frame (1). The handle (22) is symmetrically arranged at the upper end of the cross beam plate (21). The locking frame (23) is fixedly arranged at the lower end of the cross beam plate (21). The locking frame (23) is locked and matched with the mounting groove (12). The pressing mechanism (24) is fixedly arranged at the lower end of the cross beam plate (21).

3. A dust extraction apparatus for a textile machine according to claim 2, characterised in that: The pressing mechanism (24) includes a V-shaped frame (241), a pressing roller (242), a rectangular plate (243), a rotating roller (244) and a beating piece (245). The V-shaped frame (241) is fixedly arranged at the lower end of the cross beam plate (21). The V-shaped frame (241) is arranged as a booster cavity between the inside and the cross beam plate (21). The pressing roller (242) is arranged at the lower end of the V-shaped frame (241) through a pin shaft. The two inclined surfaces of the V-shaped frame (241) are provided with rectangular grooves. The rectangular plate (243) is fixedly arranged on the rectangular groove through a screw. The beating piece (245) is arranged on the rectangular plate (243). The rotating roller (244) is fixedly arranged in the booster cavity. The rotating roller (244) is used to drive the beating piece (245) to reciprocatingly beat the surface of the fabric.

4. A dust extraction apparatus for a textile machine according to claim 3, wherein: The beating piece (245) includes a guide rod (2451), an extension spring (2452), a trapezoidal block (2453), a beating plate (2454) and a protruding block (2455). The rectangular plate (243) is uniformly provided with through holes. The guide rod (2451) is slidingly arranged on the through hole. The extension spring (2452) is arranged on the guide rod (2451). The trapezoidal block (2453) is fixedly arranged at the inner side end of the guide rod (2451). The beating plate (2454) is fixedly arranged between the outer side ends of the guide rod (2451). The protruding block (2455) is arranged on the rotating roller (244). The protruding block (2455) and the trapezoidal block (2453) are matched to drive the guide rod (2451) to reciprocate.

5. A dust extraction apparatus for a textile machine according to claim 2, characterised in that: The locking block (231) is fixedly arranged at the front and rear ends of the locking frame (23). The locking block (231) is telescopic. The mounting groove (12) is uniformly provided with clamping grooves matched with the locking block (231).

6. A dust extraction apparatus for a textile machine according to claim 1, characterised in that: The cleaning and dust removing unit (3) comprises a U-shaped frame (31), a cleaning frame (32), a negative pressure cavity (33), a scraping piece (34), a collecting groove (35) and a cleaning piece (36), the inside lower end of the mounting frame (1) is provided with the U-shaped frame (31) through screw mounting, the upper middle part of the U-shaped frame (31) is provided with the cleaning frame (32), the negative pressure cavity (33) is arranged between the cleaning frame (32) and the U-shaped frame (31), the inner side surface of the cleaning frame (32) is symmetrically provided with an arc-shaped groove, the scraping piece (34) is mounted in the arc-shaped groove, the collecting groove (35) is uniformly arranged between the cleaning frame (32) and the negative pressure cavity (33), the middle part of the cleaning frame (32) is provided with a sliding groove, and the cleaning piece (36) is fixedly mounted in the sliding groove.

7. A dust extraction apparatus for a textile machine according to claim 6, characterised in that: The scraping piece (34) is a rubber roller, and the rubber roller is uniformly provided with rubber scraping pieces.

8. A dust extraction apparatus for a textile machine according to claim 7, characterised in that: The cleaning piece (36) comprises a guide rail (361) and a sliding frame (362), the guide rail (361) is fixedly mounted in the sliding groove, the sliding frame (362) is slidably arranged on the guide rail (361), flexible rubber is fixedly mounted between the two ends of the sliding frame (362) and the sliding groove, and the upper end of the sliding frame (362) is uniformly provided with brush hairs.

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