A grinding equipment for manufacturing low-carbon and environmentally friendly powder coatings

Abstract

This utility model discloses a grinding device for manufacturing low-carbon and environmentally friendly powder coatings, including a grinding box, a pressure plate, a lifting assembly, a motor, and grinding wheels. The grinding wheels are matched with the interior of the grinding box and are vertically and coaxially spaced inside the vertically positioned grinding box, ensuring that the small-diameter end of the grinding wheel faces downwards. Inside the grinding box, a pressure plate is horizontally and coaxially positioned above the grinding wheels, and the pressure plate is matched with the upper part of the grinding box. The pressure plate moves vertically up and down within the grinding box relative to the area above the grinding wheels via the lifting assembly. A motor is vertically positioned at the middle of the upper surface of the pressure plate, relative to the interior of the grinding box. The output end of the motor extends vertically downwards from the lower surface of the pressure plate and is screwed to the large-diameter end of the grinding wheels via a coupling. This utility model allows adjustment of the gap between the bottom of the grinding box and the grinding wheels, thereby controlling the grinding precision of the coating and has a wide range of applications.

Description

Technical Field

[0001] This utility model relates to the field of coating processing technology, specifically to a grinding equipment for manufacturing low-carbon and environmentally friendly powder coatings. Background Technology

[0002] Paint is a viscous liquid applied to the surface of an object to be protected or decorated, forming a firmly adhering continuous film. It is typically based on resin, oil, or emulsion, with or without pigments and fillers, and with appropriate additives, formulated with organic solvents or water. The susceptibility of paint to microbial invasion depends on the chemical properties of the paint and solvent, the type of surface covering, and the conditions of exposure of the paint film. Grinding is performed using a grinding mill during the paint manufacturing process. However, existing grinding equipment generally suffers from the following drawbacks: 1) The feed inlet is not sealed during grinding, causing paint to easily splash out; 2) Grinding is insufficient and inefficient; 3) When the collection tank is full, the grinding equipment must be stopped and the collection tank replaced before restarting, reducing work efficiency. Therefore, these problems urgently need to be solved. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a low-carbon and environmentally friendly grinding equipment for manufacturing powder coatings. By using an electric push rod and a pressure plate in combination, the gap between the bottom of the grinding box and the grinding wheel can be adjusted, thereby controlling the grinding precision of the coating. It has a wide range of applications.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a low-carbon and environmentally friendly powder coating manufacturing grinding equipment, the innovation of which lies in: including a grinding box, a pressure plate, a lifting assembly, a motor, and a grinding wheel; the grinding wheel is matched with the interior of the grinding box and is vertically and coaxially spaced inside the vertically arranged grinding box, ensuring that the small-diameter end of the grinding wheel faces downwards; a pressure plate is also horizontally and coaxially arranged inside the grinding box relative to the grinding wheel, and the pressure plate is matched with the upper part of the grinding box, and moves vertically up and down within the grinding box relative to the area above the grinding wheel via the lifting assembly; a motor is also vertically arranged at the middle position of the upper surface of the pressure plate relative to the interior of the grinding box, the output end of the motor extends vertically downwards from the lower surface of the pressure plate, and is screwed and fixed to the large-diameter end of the grinding wheel via a coupling, thereby driving the grinding wheel to move vertically up and down to adjust the gap between the bottom of the grinding box and the grinding wheel, and under the drive of the motor, the grinding wheel rotates to grind the raw materials inside the grinding box;

[0005] The upper part of the grinding box is a hollow cylindrical structure, and the lower part is a hollow frustum-shaped structure. The upper end of the lower part of the grinding box is a large-diameter end, and the large-diameter end of the lower part matches the lower end of the upper part, and is integrally formed. The inner conical surface of the lower part of the grinding box matches the conical surface of the grinding wheel, and the gap between the bottom of the grinding box and the grinding wheel is adjusted by the vertical up-and-down movement of the grinding wheel.

[0006] Preferably, the pressure plate has a circular structure, and its outer diameter matches the inner diameter of the upper half of the grinding box, ensuring that the grinding box does not interfere with the vertical movement of the pressure plate.

[0007] Preferably, the lifting assembly includes electric push rods; electric push rods are also vertically and symmetrically arranged on the left and right sides of the upper surface of the grinding box, the pushing ends of the two electric push rods move synchronously and are symmetrically arranged on the left and right sides of the motor; the pushing ends of the two electric push rods extend vertically downward from the inner top surface of the grinding box and are respectively screwed and fixed to the corresponding position on the upper surface of the pressure plate, thereby driving the pressure plate to move vertically up and down in the grinding box.

[0008] Preferably, a clearance hole matching the motor is vertically embedded through the upper surface of the grinding box relative to the position of the motor, and the tail of the motor passes vertically upward through the clearance hole through the upper surface of the grinding box, and the clearance hole ensures that the grinding box does not interfere with the vertical up and down movement of the motor with the pressure plate.

[0009] Preferably, it also includes a feed pipe and a sealing cap; a feed pipe is also inclinedly embedded and connected at the upper left outer side of the upper half of the grinding box, and the lower end of the feed pipe extends obliquely downward from the left inner side wall of the upper half of the grinding box, without interfering with the vertical up and down movement of the pressure plate; a matching sealing cap is also horizontally sleeved at the upper end of the feed pipe, and the two are sealed and screwed together.

[0010] Preferably, the vertical downward movement limit position of the grinding wheel must ensure that the pressure plate is located below the lower end of the feed pipe and blocks the feed pipe; the vertical upward movement limit position of the grinding wheel must ensure that the pressure plate is located above the feed pipe and does not interfere with the material addition action of the feed pipe.

[0011] Preferably, it also includes support legs, a housing, an upper collection box, and a lower collection box; the lower half of the grinding box has rectangular vertically symmetrical support legs on its outer conical surface, the lower end of each support leg is supported on the ground, and its upper end is fixedly connected to the corresponding position of the lower half of the grinding box's outer conical surface, thereby supporting and fixing the grinding box and suspending it in the air; a discharge hole is vertically embedded in the middle of the small-diameter end face of the lower half of the grinding box, and a solenoid valve for controlling its on / off state is provided in the discharge hole; a housing is horizontally arranged on the ground between the four support legs and directly below the discharge hole, the housing being a hollow cuboid structure with an open upper surface, and the lower half of the grinding box... The diameter end is covered inside; within the box, an upper collection box and a lower collection box are horizontally parallel to each other, and both the upper and lower collection boxes are hollow cuboid structures with open tops; the upper and lower collection boxes are positioned directly opposite the discharge hole and are horizontally and longitudinally slidably connected to the box body, so that the ground product is collected through the discharge hole by the alternating pulling action of the upper and lower collection boxes; handles are also embedded and fixed in the middle of the front end face of the upper and lower collection boxes, and each handle is provided with a rubber anti-slip sleeve, and each anti-slip sleeve is provided with anti-slip texture, so that the corresponding upper or lower collection box can be pulled by the handle.

[0012] Preferably, it further includes a first slider, a first slide rail, a second slider, a second slide rail, a third slider, and a third slide rail; the left and right sides of the upper collection box and the lower collection box are respectively provided with horizontally longitudinally arranged first sliders at vertical intervals, and the left and right inner sides of the box body are also provided with first sliders that match the first sliders at each position. The length of each first slide rail corresponds to the longitudinal width of the box body, and through the cooperation of the first slider and the corresponding first slide rail, the upper collection box and the lower collection box respectively perform horizontal longitudinal pulling motion along the box body;

[0013] On the upper surface of the lower collection box, two second slide rails are horizontally and longitudinally arranged along its left and right edges. The two second slide rails are symmetrically arranged, and their lengths correspond to the longitudinal length of the lower collection box. They do not affect the collection of the ground product into the lower collection box. On the lower surface of the upper collection box, a second slider is provided at each position of the second slide rail. The upper collection box slides horizontally and longitudinally along the lower collection box through the cooperation of the second slide rail and the second slider.

[0014] A third slider is horizontally and longitudinally provided on the lower surface of the lower collection box near its left and right sides. A third slide rail matching the third slider is horizontally and longitudinally provided on the inner bottom surface of the box body relative to each third slider position. The length of each third slide rail corresponds to the longitudinal width of the box body. Through the cooperation of the third slider and the third slide rail, the lower collection box slides horizontally and longitudinally along the box body.

[0015] The beneficial effects of this utility model are:

[0016] (1) This utility model can adjust the gap between the bottom of the grinding box and the grinding wheel by using electric push rod and pressure plate together, thereby controlling the grinding accuracy of the coating and has a wide range of applications;

[0017] (2) This utility model uses the combination of electric push rod and pressure plate to squeeze the raw material downward, thereby ensuring that the raw material can be fully ground;

[0018] (3) This utility model uses the electric push rod and the pressure plate together to block the feed pipe by the vertical downward movement of the pressure plate, thereby preventing the coating from splashing out of the feed pipe during grinding;

[0019] (4) This utility model improves work efficiency by using the upper collection box and the lower collection box alternately, thus eliminating the need to stop the operation. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the structure of a grinding equipment for manufacturing low-carbon and environmentally friendly powder coatings according to this utility model.

[0021] Figure 2 This is a schematic diagram of the working state of this utility model.

[0022] Among them, 1-support leg; 2-grinding box; 3-feed pipe; 4-sealing cover; 5-discharge hole; 6-pressure plate; 7-electric push rod; 8-motor; 9-grinding wheel; 10-box body; 11-upper collection box; 12-handle; 13-lower collection box; 14-first slide rail; 15-first slider; 16-second slide rail; 17-second slider; 18-third slide rail; 19-third slider. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below through specific embodiments.

[0024] This utility model discloses a grinding device for manufacturing low-carbon and environmentally friendly powder coatings, comprising a grinding box 2, a pressure plate 6, a lifting assembly, a motor 8, and a grinding wheel 9; the specific structure is as follows: Figure 1 , Figure 2 As shown, the grinding wheel 9 matches the interior of the grinding box 2 and is vertically and coaxially spaced inside the vertically positioned grinding box 2, ensuring that the small diameter end of the grinding wheel 9 faces downwards. Inside the grinding box 2, a pressure plate 6 is horizontally and coaxially positioned above the grinding wheel 9, and the pressure plate 6 matches the interior of the upper half of the grinding box 2. It moves vertically up and down within the grinding box 2 relative to the area above the grinding wheel 9 via a lifting assembly. A motor 8 is vertically positioned at the middle of the upper surface of the pressure plate 6 relative to the interior of the grinding box 2. The output end of the motor 8 extends vertically downwards from the lower surface of the pressure plate 6 and is screwed to the large diameter end of the grinding wheel 9 via a coupling, thereby driving the grinding wheel 9 to move vertically up and down to adjust the gap between the bottom of the grinding box 2 and the grinding wheel 9. Driven by the motor 8, the grinding wheel 9 rotates to grind the raw materials inside the grinding box 2.

[0025] like Figure 1 , Figure 2 As shown, the upper part of the grinding box 2 is a hollow cylindrical structure, and its lower part is a hollow frustum-shaped structure. The upper end of the lower part of the grinding box 2 is a large-diameter end, which matches the lower end of its upper part and is integrally formed. The inner conical surface of the lower part of the grinding box 2 matches the conical surface of the grinding wheel 9, and the gap between the bottom of the grinding box 2 and the grinding wheel 9 is adjusted by the vertical up-and-down movement of the grinding wheel 9. The pressure plate 6 is a circular structure, and its outer diameter matches the inner diameter of the upper part of the grinding box 2, ensuring that the vertical up-and-down movement of the pressure plate 6 is not interfered with by the grinding box 2.

[0026] The lifting assembly of this utility model includes an electric push rod 7; such as Figure 1 , Figure 2 As shown, electric push rods 7 are vertically and symmetrically arranged on the left and right sides of the upper surface of the grinding box 2. The pushing ends of the two electric push rods 7 move synchronously and are symmetrically arranged on the left and right sides of the motor 8. The pushing ends of the two electric push rods 7 extend vertically downward out of the inner top surface of the grinding box 2 and are screwed and fixed to the corresponding positions on the upper surface of the pressure plate 6, thereby driving the pressure plate 6 to move vertically up and down inside the grinding box 2. A clearance hole matching the motor 8 is also vertically embedded and opened on the upper surface of the grinding box 2 relative to the position of the motor 8. The tail of the motor 8 passes vertically upward through the clearance hole to the upper surface of the grinding box 2, and the clearance hole ensures that the grinding box 2 does not interfere with the vertical up and down movement of the motor 8 with the pressure plate 6.

[0027] like Figure 1 , Figure 2As shown, a feed pipe 3 is also inclinedly embedded and connected to the upper left outer side of the upper half of the grinding box 2. The lower end of the feed pipe 3 extends downward from the upper left inner side wall of the grinding box 2 and does not interfere with the vertical up and down movement of the pressure plate 6. A matching sealing cover 4 is also horizontally sleeved at the upper end of the feed pipe 3, and the two are sealed and screwed together.

[0028] Specifically, the vertical downward movement limit position of the grinding wheel 9 must ensure that the pressure plate 6 is located below the lower end of the feed pipe 3 and blocks the feed pipe 3; the vertical upward movement limit position of the grinding wheel 9 must ensure that the pressure plate 6 is located above the feed pipe 3 and does not interfere with the material addition action of the feed pipe 3.

[0029] In this invention, the lower half of the outer conical surface of the grinding box 2 is also provided with rectangular vertically symmetrical support legs 1, such as... Figure 1 , Figure 2 As shown, the lower end of each support leg 1 is supported on the ground, and its upper end is fixedly connected to the corresponding position of the outer conical surface of the lower half of the grinding box 2. Thus, the grinding box 2 is supported and fixed by the support leg 1, and the grinding box 2 is suspended in the air. A material discharge hole 5 is vertically embedded and opened in the middle of the small diameter end face of the lower half of the grinding box 2, and a solenoid valve for controlling its opening and closing is also provided in the material discharge hole 5. A box body 10 is horizontally provided on the ground between the four support legs 1 and directly below the material discharge hole 5. The box body 10 is a hollow cuboid structure with an open upper surface, and covers the small diameter end of the lower half of the grinding box 2 inside it.

[0030] like Figure 1 , Figure 2 As shown, an upper collection box 11 and a lower collection box 13 are horizontally parallel and matched within the box body 10. Both the upper collection box 11 and the lower collection box 13 are hollow cuboid structures with open upper ends. The upper collection box 11 and the lower collection box 13 are positioned directly opposite the discharge hole 5 and are horizontally and longitudinally slidably connected to the box body 10. The ground product is collected through the discharge hole 5 by the alternating pulling action of the upper collection box 11 and the lower collection box 13. A handle 12 is also embedded and fixed in the middle of the front end face of the upper collection box 11 and the lower collection box 13. Each handle 12 is provided with a rubber anti-slip sleeve and anti-slip texture on its surface. The corresponding upper collection box 11 or lower collection box 13 can be pulled by the handle 12.

[0031] like Figure 1 , Figure 2As shown, the upper collection box 11 and the lower collection box 13 are respectively provided with horizontally longitudinally arranged first sliders 15 at symmetrical intervals on the left and right sides. The left and right inner sides of the box body 10 are also provided with first sliders 15 that match each first slider 15. The length of each first slide rail 14 corresponds to the longitudinal width of the box body 10. Through the cooperation of the first sliders 15 and the corresponding first slide rails 14, the upper collection box 11 and the lower collection box 13 respectively perform horizontal longitudinal pulling motion along the box body 10.

[0032] like Figure 1 , Figure 2 As shown, on the upper surface of the lower collection box 13, there are two horizontally longitudinally arranged second slide rails 16 near the left and right edges. The two second slide rails 16 are symmetrically arranged, and their lengths correspond to the longitudinal length of the lower collection box 13. They do not affect the action of collecting the ground products into the lower collection box 13. On the lower surface of the upper collection box 11, there are also second sliders 17 that match the second slide rails 16. Through the cooperation of the second slide rails 16 and the second sliders 17, the upper collection box 11 slides horizontally longitudinally along the lower collection box 13.

[0033] like Figure 1 , Figure 2 As shown, a third slider 19 is horizontally and longitudinally provided on the lower surface of the lower collection box 13 near its left and right sides. A third slide rail 18 matching the third slider 19 is horizontally and longitudinally provided on the inner bottom surface of the box body 10 relative to the position of each third slider 19. The length of each third slide rail 18 corresponds to the longitudinal width of the box body 10. Through the cooperation of the third slider 19 and the third slide rail 18, the lower collection box 13 slides horizontally and longitudinally along the box body 10.

[0034] The working principle of this utility model:

[0035] First, raw materials are added into the grinding chamber 2 through the feed pipe 3, at which point the raw materials are positioned between the grinding chamber 2 and the grinding wheel 9. Then, driven by the electric push rod 7, the pressure plate 6 drives the grinding wheel 9 to move vertically downwards to adjust the gap between the bottom of the grinding chamber 2 and the grinding wheel 9. At the same time, the pressure plate 6 seals the feed pipe 3. Then, the motor 8 is started, and the grinding wheel 9 rotates to grind the raw materials. After grinding is completed, the solenoid valve is opened, and the ground product is collected into the upper collection box 11 through the discharge hole 5.

[0036] When the upper collection box 11 is full, the upper collection box 11 is pulled out, and the ground product is collected into the lower collection box 13 through the discharge hole 5.

[0037] The beneficial effects of this utility model are:

[0038] (1) This utility model can adjust the gap between the bottom of the grinding box 2 and the grinding wheel 9 by using the electric push rod 7 and the pressure plate 6 together, thereby controlling the grinding accuracy of the coating and having a wide range of applications;

[0039] (2) By using the electric push rod 7 and the pressure plate 6 together, the raw material can be squeezed downwards, thereby ensuring that the raw material can be fully ground;

[0040] (3) By using the electric push rod 7 and the pressure plate 6 together, the feed pipe 3 can be blocked by the vertical downward movement of the pressure plate 6, thereby preventing the coating from splashing out of the feed pipe 3 during grinding;

[0041] (4) By alternating the use of the upper collection box 11 and the lower collection box 13, this utility model can improve work efficiency without interrupting the operation.

[0042] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the concept and scope of the present utility model. Without departing from the design concept of the present utility model, all modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope of the present utility model. The technical content for which protection is sought in the present utility model has been fully recorded in the technical requirements.

Claims

1. A grinding equipment for manufacturing low-carbon and environmentally friendly powder coatings, characterized in that: The system includes a grinding box, a pressure plate, a lifting assembly, a motor, and grinding wheels. The grinding wheels are matched to the interior of the grinding box and are vertically and coaxially spaced inside the vertically positioned grinding box, ensuring that the small-diameter end of the grinding wheel faces downwards. Inside the grinding box, a pressure plate is horizontally and coaxially positioned above the grinding wheels, and the pressure plate is matched to the upper part of the grinding box. The pressure plate moves vertically up and down within the grinding box relative to the area above the grinding wheels via the lifting assembly. A motor is vertically positioned at the middle of the upper surface of the pressure plate, relative to the interior of the grinding box. The output end of the motor extends vertically downwards from the lower surface of the pressure plate and is screwed to the large-diameter end of the grinding wheels via a coupling, thereby driving the grinding wheels to move vertically up and down to adjust the gap between the bottom of the grinding box and the grinding wheels. Driven by the motor, the grinding wheels rotate to grind the raw materials inside the grinding box. The upper part of the grinding box is a hollow cylindrical structure, and the lower part is a hollow frustum-shaped structure. The upper end of the lower part of the grinding box is a large-diameter end, and the large-diameter end of the lower part matches the lower end of the upper part, and is integrally formed. The inner conical surface of the lower part of the grinding box matches the conical surface of the grinding wheel, and the gap between the bottom of the grinding box and the grinding wheel is adjusted by the vertical up-and-down movement of the grinding wheel.

2. The grinding equipment for manufacturing low-carbon and environmentally friendly powder coatings according to claim 1, characterized in that: The pressure plate has a circular structure, and its outer diameter matches the inner diameter of the upper half of the grinding box, ensuring that the grinding box does not interfere with the vertical movement of the pressure plate.

3. The grinding equipment for manufacturing low-carbon and environmentally friendly powder coatings according to claim 2, characterized in that: The lifting assembly includes an electric push rod; electric push rods are also vertically and symmetrically arranged on the left and right sides of the upper surface of the grinding box. The pushing ends of the two electric push rods move synchronously and are symmetrically arranged on the left and right sides of the motor; the pushing ends of the two electric push rods extend vertically downward from the inner top surface of the grinding box and are screwed and fixed to the corresponding positions on the upper surface of the pressure plate, thereby driving the pressure plate to move vertically up and down inside the grinding box.

4. The grinding equipment for manufacturing low-carbon and environmentally friendly powder coatings according to claim 3, characterized in that: A clearance hole matching the motor is vertically embedded through the upper surface of the grinding box relative to the position of the motor. The tail of the motor passes vertically upward through the clearance hole through the upper surface of the grinding box, and the clearance hole ensures that the grinding box does not interfere with the vertical up and down movement of the motor with the pressure plate.

5. The grinding equipment for manufacturing low-carbon and environmentally friendly powder coatings according to claim 2, characterized in that: It also includes a feed pipe and a sealing cap; a feed pipe is also inclinedly embedded and connected at the upper left outer side of the upper half of the grinding box, and the lower end of the feed pipe extends downward from the left inner side wall of the upper half of the grinding box, without interfering with the vertical up and down movement of the pressure plate; a matching sealing cap is also horizontally sleeved at the upper end of the feed pipe, and the two are sealed and screwed together.

6. The grinding equipment for manufacturing low-carbon and environmentally friendly powder coatings according to claim 5, characterized in that: The vertical downward movement limit position of the grinding wheel must ensure that the pressure plate is below the lower end of the feed pipe and blocks the feed pipe; the vertical upward movement limit position of the grinding wheel must ensure that the pressure plate is above the feed pipe and does not interfere with the material addition action of the feed pipe.

7. The grinding equipment for manufacturing low-carbon and environmentally friendly powder coatings according to claim 1, characterized in that: It also includes support legs, a housing, an upper collection box, and a lower collection box; the lower half of the grinding box has rectangular, vertically symmetrical support legs on its outer conical surface, each support leg's lower end resting on the ground, and its upper end fixedly connected to the corresponding position of the lower half of the grinding box's outer conical surface, thus supporting and fixing the grinding box and suspending it in the air; a through-hole is vertically embedded in the middle of the small-diameter end face of the lower half of the grinding box, and a solenoid valve for controlling its on / off state is installed in the through-hole; a housing is horizontally positioned on the ground between the four support legs and directly below the through-hole, the housing being a hollow cuboid structure with an open upper surface, supporting the lower half of the grinding box's small-diameter end face. The container is covered inside; within the container, there are also upper and lower collection boxes arranged horizontally and parallel to each other, and both the upper and lower collection boxes are hollow cuboid structures with open tops; the upper and lower collection boxes are both positioned directly opposite the discharge hole and are slidably connected to the container horizontally and longitudinally, so that the ground product is collected through the discharge hole by the alternating pulling action of the upper and lower collection boxes; handles are also embedded and fixed in the middle of the front end face of the upper and lower collection boxes, and each handle is provided with a rubber anti-slip sleeve, and each anti-slip sleeve is provided with anti-slip texture, so that the corresponding upper or lower collection box can be pulled by the handle.

8. The grinding equipment for manufacturing low-carbon and environmentally friendly powder coatings according to claim 7, characterized in that: It also includes a first slider, a first slide rail, a second slider, a second slide rail, a third slider, and a third slide rail; the left and right sides of the upper collection box and the lower collection box are respectively provided with horizontally longitudinally arranged first sliders at vertical intervals, and the left and right inner sides of the box body are also provided with first sliders that match the first sliders at each position. The length of each first slide rail corresponds to the longitudinal width of the box body, and through the cooperation of the first slider and the corresponding first slide rail, the upper collection box and the lower collection box respectively perform horizontal longitudinal pulling motion along the box body; On the upper surface of the lower collection box, two second slide rails are horizontally and longitudinally arranged along its left and right edges. The two second slide rails are symmetrically arranged, and their lengths correspond to the longitudinal length of the lower collection box. They do not affect the collection of the ground product into the lower collection box. On the lower surface of the upper collection box, a second slider is provided at each position of the second slide rail. The upper collection box slides horizontally and longitudinally along the lower collection box through the cooperation of the second slide rail and the second slider. A third slider is horizontally and longitudinally provided on the lower surface of the lower collection box near its left and right sides. A third slide rail matching the third slider is horizontally and longitudinally provided on the inner bottom surface of the box body relative to each third slider position. The length of each third slide rail corresponds to the longitudinal width of the box body. Through the cooperation of the third slider and the third slide rail, the lower collection box slides horizontally and longitudinally along the box body.

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