Dust removal and purification device for furniture processing workshop

Abstract

The invention relates to the technical field of dust removal and purification, and particularly discloses a dust removal and purification device for a furniture processing workshop, the dust removal and purification device comprises a fixed base, the top of the fixed base is fixedly connected with a supporting frame, and the end, away from the fixed base, of the supporting frame is fixedly connected with a reinforcing frame; the outer side of the dust removal device is fixedly connected with the inner side of the reinforcing frame; the multiple sets of supporting frames are arranged, and the multiple sets of supporting frames are evenly distributed on the fixed base. The dust removal device comprises a purification cylinder, a material taking opening is formed in the outer side of the purification cylinder, an air outlet pipe is communicated with the center position of the bottom of the purification cylinder, the end, away from the purification cylinder, of the air outlet pipe is communicated with an air suction pump, and a filter screen is fixedly connected to the inner wall of the purification cylinder. And an air inlet pipe penetrates through and is fixedly connected to the center of the top of the purification cylinder. The dust removal and purification device for the furniture processing workshop can extinguish sparks, wash and dehydrate sucked gas.

Description

Technical Field

[0001] This invention relates to the field of dust removal and purification technology, specifically a dust removal and purification device for furniture processing workshops. Background Technology

[0002] The furniture manufacturing industry is a typical labor-intensive and material-processing industry. Its production process involves numerous mechanical processing steps such as cutting, planing, sanding, drilling, and carving of wood, engineered wood, and composite materials. These processes generate a large amount of dust particles with complex compositions and varying forms, mainly including: Wood dust: ranging in particle size from large wood shavings to fine sawdust, lightweight and easily dispersed; Composite material dust: originating from MDF, particleboard, etc., which may contain formaldehyde, phenolic resins, and other chemical adhesives, posing potential health hazards; Surface treatment dust: such as mixed dust generated from sanding painted surfaces, which may contain paint particles, fillers, etc. This dust permeating the workshop can lead to a series of serious problems: Occupational health and safety hazards: Health hazards: Long-term inhalation of wood dust, especially fine inhalable dust, can lead to respiratory diseases and even trigger allergic reactions and occupational asthma. Safety Hazards: Wood dust is a flammable and explosive substance. When it reaches a certain concentration in the air and comes into contact with an open flame, high temperature or static spark, it can easily cause a serious dust explosion, posing a huge threat to the safety of people's lives and property.

[0003] Chinese patent CN119075527A discloses a dust removal device for a furniture manufacturing workshop, comprising a main body, a telescopic mechanism, and a drive mechanism. The filter mechanism is fixedly installed inside the main body, and the telescopic mechanism is fixedly installed inside the filter mechanism. The drive mechanism is fixedly installed on the top of the main body. An air inlet is provided on one side of the main body, a discharge outlet is fixedly installed at the bottom, and an exhaust outlet is fixedly installed on the top. A partition plate is fixedly installed inside the main body. This invention filters the wood chips, leaving them outside the filter mechanism. The filtered air enters the upper part of the main body and is then discharged into the air through the exhaust outlet. The external metal structure of the filter mechanism prevents the wood chips from scratching the air during filtration, thus maintaining the filtration effect even during long-term operation. However, this device cannot perform pre-treatment operations such as spark extinguishing, washing, and dehydration on the inhaled air, and therefore cannot reduce the filtration burden on the filter components. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides: a dust removal and purification device for a furniture processing workshop, comprising: A fixed base, wherein a support frame is fixedly connected to the top of the fixed base, and a reinforcing frame is fixedly connected to the end of the support frame away from the fixed base; A dust removal device, wherein the outer side of the dust removal device is fixedly connected to the inner side of the reinforcing frame; The support frame is provided in multiple sets, and the multiple sets of support frames are evenly distributed on the fixed base; The dust removal device includes: The purification cylinder has a material inlet on its outer side, an air outlet pipe at the center of its bottom, and an air pump at the end of the air outlet pipe away from the purification cylinder. A filter screen is fixedly connected to the inner wall of the purification cylinder, and an air inlet pipe is fixedly connected through and to the center of the top of the purification cylinder. Gas is blown from the guide pipe to the surface of the filter screen, which can filter and remove dust from the passing gas. By intercepting impurities in the gas through the filter screen, the gas can be dusted and the air inside the workshop can be effectively purified. An exhaust device, the top of which is connected to the bottom of an intake pipe; A pretreatment device, the outer side of which is fixedly connected to the outer wall of the purification cylinder via a bracket.

[0005] Preferably, the outer side of the purification cylinder is fixedly connected to the inner side of the reinforcing frame, the reinforcing frame is sleeved on the outer side of the purification cylinder, and the end of the air outlet pipe near the air pump passes through the bottom of the purification cylinder and is fixedly connected to the purification cylinder.

[0006] Preferably, the housing of the air pump is fixedly connected to the bottom of the purification cylinder via a bracket, and the bottom of the air pump is fixedly connected to the top of the fixed base.

[0007] Preferably, the exhaust device includes an annular electric slide rail. A movable block is slidably connected inside the annular electric slide rail via an electric slider. A movable frame is fixedly connected to the side of the movable block away from the annular electric slide rail. An electronic slide rail is fixedly connected to the inner wall of the movable frame. A limiting sleeve is slidably connected inside the electronic slide rail via an electric slider. A guide tube is fixedly connected to the inner wall of the limiting sleeve. A corrugated pipe is connected to the top of the guide tube. When the guide tube moves, it drives the corrugated pipe to move and deform. At this time, the gas can be discharged to different positions on the filter screen surface as the guide tube moves, thereby reducing the filtration load on the same area of ​​the filter screen and effectively improving the filtration efficiency and service life of the filter screen.

[0008] Preferably, the outer side of the annular electric slide rail is fixedly connected to the inner wall of the purification cylinder, the annular electric slide rail is positioned above the filter screen, and two sets of moving blocks are provided, with the two sets of moving blocks symmetrically distributed on both sides of the moving frame.

[0009] Preferably, the electronic slide rails are provided in two sets, which are symmetrically distributed on both sides of the inner wall of the moving frame, and the end of the corrugated tube away from the guide tube is connected to the bottom of the air intake pipe.

[0010] Preferably, the pretreatment device includes a treatment cylinder, with an air intake pipe connected through and fixedly connected to the top of the treatment cylinder, a water inlet pipe connected to the outer side of the treatment cylinder, a water outlet pipe connected to the bottom of the treatment cylinder, a positioning frame fixedly connected to the outer side of the treatment cylinder, an air delivery pipe connected to the outer side of the treatment cylinder near the top, an air collection frame connected to the end of the air delivery pipe away from the treatment cylinder, a water baffle plate fixedly connected to the inner wall of the treatment cylinder, and water removal holes opened on the water baffle plate. The air delivery pipe discharges the gas after spark extinguishing, washing and dehydration into the air collection frame, and finally discharges it into the air intake pipe through the air collection frame. This can extinguish sparks, wash and dehydrate the inhaled gas, prevent wood dust mixed with sparks from entering the dust removal device, and at the same time perform preliminary dust removal on the gas, further reducing the filtration burden on the filter screen.

[0011] Preferably, the bottom of the suction pipe extends to the inner bottom of the treatment cylinder, the bottom of the positioning frame is fixedly connected to the top of the air collection frame, one end of the air delivery pipe extends into the interior of the treatment cylinder, the outer side of the air collection frame is fixedly connected to the outer wall of the purification cylinder through a bracket, multiple sets of baffles are provided and staggered, the baffles are sleeved on the outer side of the suction pipe, and the bottom of the air collection frame is connected to the top of the air inlet pipe.

[0012] Preferably, the pretreatment device further includes a drive motor, the bottom of which is fixedly connected to the top of the air collection frame. A rotating disk is fixedly connected to the output end of the drive motor, and a brush plate is fixedly connected to the outer side of the rotating disk. Multiple sets of brush plates are provided. The movable end of the drive motor passes through and extends into the interior of the treatment cylinder. The movable end of the drive motor is rotatably connected to the bottom of the treatment cylinder through a sealed bearing. The output end of the drive motor drives the rotating disk to rotate. When the rotating disk rotates, it drives the brush plate to rotate. The rotating brush plate can clean the inner wall of the treatment cylinder, remove dust and particles adhering to the inner wall, and improve the cleaning efficiency of the inside of the treatment cylinder.

[0013] This invention provides a dust removal and purification device for furniture processing workshops. It has the following beneficial effects: 1. The furniture processing workshop uses a dust removal and purification device. Through the installation of the dust removal device, the gas is blown from the guide pipe to the surface of the filter screen, and the filter screen can filter and remove dust from the passing gas. By intercepting the impurities in the gas through the filter screen, the gas can be dusted and the air inside the workshop can be effectively purified.

[0014] 2. The dust removal and purification device used in this furniture processing workshop, through the installation of the exhaust device, the guide pipe moves and drives the corrugated pipe to move and deform when it moves. At this time, the gas can be discharged to different positions on the surface of the filter screen as the guide pipe moves, thereby reducing the filtration load on the same area of ​​the filter screen and effectively improving the filtration efficiency and service life of the filter screen.

[0015] 3. The dust removal and purification device used in this furniture processing workshop, through the installation of the pretreatment device, discharges the gas after spark extinguishing, washing and dehydration into the gas collection frame through the gas supply pipe, and finally discharges it into the air inlet pipe through the gas collection frame. It can extinguish sparks, wash and dehydrate the gas that is drawn in, prevent wood dust mixed with sparks from entering the dust removal device, and at the same time perform preliminary dust removal on the gas, further reducing the filtration burden on the filter screen.

[0016] 4. The dust removal and purification device used in this furniture processing workshop, through the installation of brush plates, drives the output end of the drive motor to rotate the rotating disk. When the rotating disk rotates, it drives the brush plates to rotate as well. The rotating brush plates can clean the inner wall of the treatment cylinder, removing dust and particles adhering to the inner wall, thereby improving the cleaning efficiency of the inside of the treatment cylinder. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the dust removal and purification device for furniture processing workshops according to the present invention; Figure 2 This is a schematic diagram of the reinforcement frame of the present invention; Figure 3 This is a schematic diagram of the internal structure of the purification cylinder of the present invention; Figure 4 This is a schematic diagram of the structure of the filter screen of the present invention; Figure 5 This is a schematic diagram of the bellows structure of the present invention; Figure 6 This is a schematic diagram of the gas collection frame of the present invention; Figure 7 This is a schematic diagram of the internal structure of the processing cylinder of the present invention; Figure 8 This is a schematic diagram of the structure of the present invention with a brush plate.

[0018] In the diagram: 1. Fixed base; 2. Support frame; 3. Reinforcing frame; 4. Dust removal device; 41. Purification cylinder; 42. Material inlet; 43. Air outlet pipe; 44. Air pump; 45. Filter screen; 46. Air inlet pipe; 47. Exhaust device; 471. Circular electric slide rail; 472. Moving block; 473. Moving frame; 474. Electronic slide rail; 475. Limiting sleeve; 476. Guide tube; 477. Corrugated pipe; 48. Pretreatment device; 481. Treatment cylinder; 482. Air suction pipe; 483. Water inlet pipe; 484. Water outlet pipe; 485. Positioning frame; 486. Air delivery pipe; 487. Air collection frame; 488. Water baffle; 489. Water removal hole; 4810. Drive motor; 4811. Rotating disk; 4812. Plate with brush. Detailed Implementation

[0019] 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.

[0020] For the first embodiment, please refer to... Figures 1-5 The present invention provides a technical solution: a dust removal and purification device for a furniture processing workshop, comprising: A fixed base 1 is provided, and a support frame 2 is fixedly connected to the top of the fixed base 1. A reinforcing frame 3 is fixedly connected to the end of the support frame 2 away from the fixed base 1. Dust removal device 4, the outer side of dust removal device 4 is fixedly connected to the inner side of reinforcing frame 3; Multiple sets of support frames 2 are provided, and the multiple sets of support frames 2 are evenly distributed on the fixed base 1; The dust removal device 4 includes: The purification cylinder 41 has a material inlet 42 on its outer side, and an air outlet 43 is connected to the bottom of the purification cylinder 41 at the center. An air pump 44 is connected to the end of the air outlet 43 away from the purification cylinder 41. A filter screen 45 is fixedly connected to the inner wall of the purification cylinder 41, and an air inlet 46 is fixedly connected to the top of the purification cylinder 41 at the center. Exhaust device 47, the top of exhaust device 47 is connected to the bottom of intake pipe 46; The pretreatment device 48 is fixedly connected to the outer wall of the purification cylinder 41 via a bracket.

[0021] The outer side of the purification cylinder 41 is fixedly connected to the inner side of the reinforcing frame 3. The reinforcing frame 3 is sleeved on the outer side of the purification cylinder 41. The end of the air outlet pipe 43 near the air intake pump 44 passes through the bottom of the purification cylinder 41 and is fixedly connected to the purification cylinder 41.

[0022] The outer casing of the air pump 44 is fixedly connected to the bottom of the purification cylinder 41 via a bracket, and the bottom of the air pump 44 is fixedly connected to the top of the fixed base 1.

[0023] The exhaust device 47 includes an annular electric slide rail 471. Inside the annular electric slide rail 471, a moving block 472 is slidably connected via an electric slider. A moving frame 473 is fixedly connected to the side of the moving block 472 away from the annular electric slide rail 471. An electronic slide rail 474 is fixedly connected to the inner wall of the moving frame 473. Inside the electronic slide rail 474, a limiting sleeve 475 is slidably connected via an electric slider. A guide tube 476 is fixedly connected to the inner wall of the limiting sleeve 475. A corrugated pipe 477 is connected to the top of the guide tube 476.

[0024] The outer side of the annular electric slide rail 471 is fixedly connected to the inner wall of the purification cylinder 41. The annular electric slide rail 471 is set above the filter screen 45. Two sets of moving blocks 472 are provided, and the two sets of moving blocks 472 are symmetrically distributed on both sides of the moving frame 473.

[0025] Two sets of electronic slide rails 474 are provided, and the two sets of electronic slide rails 474 are symmetrically distributed on both sides of the inner wall of the moving frame 473. The end of the bellows 477 away from the guide tube 476 is connected to the bottom of the air intake pipe 46.

[0026] In use, the suction pump 44 is turned on, and the suction pump 44 discharges all the gas inside the purification cylinder 41 through the exhaust pipe 43. Then, the gas mixed with dust in the workshop is sucked into the pretreatment device 48. After being processed by the pretreatment device 48, it enters the inlet pipe 46 and then is discharged into the corrugated pipe 477 through the inlet pipe 46. Subsequently, it is discharged into the guide pipe 476 through the corrugated pipe 477. Finally, the gas is blown from the guide pipe 476 to the surface of the filter screen 45. The filter screen 45 can filter and remove dust from the passing gas. By intercepting the impurities mixed in the gas through the filter screen 45, the gas can be dusted and the air inside the workshop can be effectively purified.

[0027] When the electronic slide rail 474 and the annular electric slide rail 471 are activated, the electric slider inside the annular electric slide rail 471 drives the moving block 472 to move, which in turn drives the moving frame 473 to move. The electric slider inside the electronic slide rail 474 drives the limiting sleeve 475 to slide, which in turn drives the guide tube 476 to move. When the guide tube 476 moves, it drives the bellows 477 to move and deform. At this time, as the guide tube 476 moves, the gas can be discharged to different positions on the surface of the filter screen 45, thereby reducing the filtration load on the same area of ​​the filter screen 45 and effectively improving the filtration efficiency and service life of the filter screen 45.

[0028] Second embodiment, please refer to Figures 1-8 The present invention provides a technical solution: Based on Embodiment 1, the pretreatment device 48 includes a treatment cylinder 481, an air suction pipe 482 is connected through and fixedly connected to the top of the treatment cylinder 481, a water inlet pipe 483 is connected to the outside of the treatment cylinder 481, a water outlet pipe 484 is connected to the bottom of the treatment cylinder 481, a positioning frame 485 is fixedly connected to the outside of the treatment cylinder 481, an air supply pipe 486 is connected to the outside of the treatment cylinder 481 near the top, an air collection frame 487 is connected to the end of the air supply pipe 486 away from the treatment cylinder 481, and a water baffle 488 is fixedly connected to the inner wall of the treatment cylinder 481, with a water removal hole 489 opened on the water baffle 488.

[0029] The bottom of the suction pipe 482 extends to the inner bottom of the treatment cylinder 481. The bottom of the positioning frame 485 is fixedly connected to the top of the gas collection frame 487. One end of the gas delivery pipe 486 extends into the interior of the treatment cylinder 481. The outer side of the gas collection frame 487 is fixedly connected to the outer wall of the purification cylinder 41 through a bracket. Multiple sets of baffles 488 are provided and are staggered. The baffles 488 are sleeved on the outer side of the suction pipe 482. The bottom of the gas collection frame 487 is connected to the top of the air inlet pipe 46.

[0030] The pretreatment device 48 also includes a drive motor 4810. The bottom of the drive motor 4810 is fixedly connected to the top of the air collection frame 487. The output end of the drive motor 4810 is fixedly connected to a rotating disk 4811. A brush plate 4812 is fixedly connected to the outside of the rotating disk 4811. Multiple sets of brush plates 4812 are provided. The movable end of the drive motor 4810 passes through and extends into the interior of the treatment cylinder 481. The movable end of the drive motor 4810 is rotatably connected to the bottom of the treatment cylinder 481 through a sealed bearing.

[0031] In use, clean water is discharged into the treatment cylinder 481 through the water inlet pipe 483. After the air pump 44 is turned on, external air is drawn into the clean water inside the treatment cylinder 481 through the air suction pipe 482. The high-speed airflow rushes out from the end of the air suction pipe 482, forming a large number of bubbles in the water. All sparks and most large dust particles are directly drawn into the water by inertia, where they are instantly cooled, extinguished, and settled. The gas is broken into countless small bubbles, which rise through the water layer. During the ascent, the gas passes through the water removal hole 489. Because there are multiple sets of water baffles 488 that are staggered, the water droplets and water mist particles in the gas, due to their large mass and inertia, cannot be removed like water droplets and water mist particles. Gas molecules, like the airflow, flexibly follow its direction and continuously collide with the surface of the baffle plate 488. After the collision, small water droplets adhere to the baffle plate 488, accumulating into larger droplets. Finally, under the action of gravity, they flow back to the bottom of the treatment cylinder 481 along the wall of the baffle plate 488. Subsequently, the gas, after being extinguished, washed, and dehydrated, is discharged into the gas collection frame 487 through the gas delivery pipe 486. Finally, it is discharged into the air inlet pipe 46 through the gas collection frame 487. This process can extinguish, wash, and dehydrate the inhaled gas, preventing wood dust mixed with sparks from entering the dust removal device 4. At the same time, it performs preliminary dust removal on the gas, further reducing the filtration burden on the filter screen 45.

[0032] Turn on the drive motor 4810, and drive the rotating disk 4811 to rotate through the output end of the drive motor 4810. When the rotating disk 4811 rotates, it drives the brush plate 4812 to rotate. The rotating brush plate 4812 can clean the inner wall of the processing cylinder 481, remove the dust and particles adhering to the inner wall, and improve the cleaning efficiency of the inside of the processing cylinder 481.

[0033] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A dust removal and purification device for a furniture processing workshop, characterized in that, include: A fixed base (1) is fixedly connected to a support frame (2) at the top of the fixed base (1), and a reinforcing frame (3) is fixedly connected to the end of the support frame (2) away from the fixed base (1). Dust removal device (4), the outer side of the dust removal device (4) is fixedly connected to the inner side of the reinforcing frame (3); The support frame (2) is provided in multiple sets, and the multiple sets of the support frame (2) are evenly distributed on the fixed base (1); The dust removal device (4) includes: A purification cylinder (41) is provided with a material inlet (42) on the outside of the purification cylinder (41). An air outlet pipe (43) is connected to the bottom of the purification cylinder (41) at the center position. An air pump (44) is connected to the end of the air outlet pipe (43) away from the purification cylinder (41). A filter screen (45) is fixedly connected to the inner wall of the purification cylinder (41). An air inlet pipe (46) is fixedly connected to the top of the purification cylinder (41) at the center position. An exhaust device (47) is provided, the top of which is connected to the bottom of an intake pipe (46); The pretreatment device (48) is fixedly connected to the outer wall of the purification cylinder (41) by means of a bracket.

2. The dust removal and purification device for a furniture processing workshop according to claim 1, characterized in that: The outer side of the purification cylinder (41) is fixedly connected to the inner side of the reinforcing frame (3). The reinforcing frame (3) is sleeved on the outer side of the purification cylinder (41). The end of the air outlet pipe (43) near the air intake pump (44) passes through the bottom of the purification cylinder (41) and is fixedly connected to the purification cylinder (41).

3. The dust removal and purification device for a furniture processing workshop according to claim 1, characterized in that: The outer shell of the suction pump (44) is fixedly connected to the bottom of the purification cylinder (41) via a bracket, and the bottom of the suction pump (44) is fixedly connected to the top of the fixed base (1).

4. The dust removal and purification device for a furniture processing workshop according to claim 1, characterized in that: The exhaust device (47) includes an annular electric slide rail (471). Inside the annular electric slide rail (471), a moving block (472) is slidably connected via an electric slider. A moving frame (473) is fixedly connected to the side of the moving block (472) away from the annular electric slide rail (471). An electronic slide rail (474) is fixedly connected to the inner wall of the moving frame (473). Inside the electronic slide rail (474), a limiting sleeve (475) is slidably connected via an electric slider. A guide tube (476) is fixedly connected to the inner wall of the limiting sleeve (475). A corrugated pipe (477) is connected to the top of the guide tube (476).

5. A dust removal and purification device for a furniture processing workshop according to claim 4, characterized in that: The outer side of the annular electric slide rail (471) is fixedly connected to the inner wall of the purification cylinder (41). The annular electric slide rail (471) is set above the filter screen (45). There are two sets of moving blocks (472), and the two sets of moving blocks (472) are symmetrically distributed on both sides of the moving frame (473).

6. The dust removal and purification device for a furniture processing workshop according to claim 4, characterized in that: The electronic slide rail (474) is provided in two sets, and the two sets of electronic slide rail (474) are symmetrically distributed on both sides of the inner wall of the moving frame (473). The end of the corrugated pipe (477) away from the guide pipe (476) is connected to the bottom of the air intake pipe (46).

7. The dust removal and purification device for a furniture processing workshop according to claim 1, characterized in that: The pretreatment device (48) includes a treatment cylinder (481), with an air suction pipe (482) connected through and fixed to the top of the treatment cylinder (481), a water inlet pipe (483) connected to the outside of the treatment cylinder (481), a water outlet pipe (484) connected to the bottom of the treatment cylinder (481), a positioning frame (485) fixedly connected to the outside of the treatment cylinder (481), an air supply pipe (486) connected to the outside of the treatment cylinder (481) near the top, an air collection frame (487) connected to the end of the air supply pipe (486) away from the treatment cylinder (481), and a baffle plate (488) fixedly connected to the inner wall of the treatment cylinder (481), with a water removal hole (489) opened on the baffle plate (488).

8. A dust removal and purification device for a furniture processing workshop according to claim 7, characterized in that: The bottom of the suction pipe (482) extends to the inner bottom of the treatment cylinder (481), the bottom of the positioning frame (485) is fixedly connected to the top of the gas collection frame (487), one end of the gas delivery pipe (486) extends to the inside of the treatment cylinder (481), the outer side of the gas collection frame (487) is fixedly connected to the outer wall of the purification cylinder (41) through a bracket, multiple sets of baffles (488) are provided and are staggered, the baffles (488) are sleeved on the outer side of the suction pipe (482), and the bottom of the gas collection frame (487) is connected to the top of the air inlet pipe (46).

9. A dust removal and purification device for a furniture processing workshop according to claim 7, characterized in that: The pretreatment device (48) also includes a drive motor (4810), the bottom of which is fixedly connected to the top of the gas collection frame (487). The output end of the drive motor (4810) is fixedly connected to a rotating disk (4811), and a brush plate (4812) is fixedly connected to the outside of the rotating disk (4811). Multiple sets of brush plates (4812) are provided. The movable end of the drive motor (4810) penetrates and extends into the interior of the treatment cylinder (481). The movable end of the drive motor (4810) is rotatably connected to the bottom of the treatment cylinder (481) through a sealed bearing.

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