A power distribution cabinet production is with internal partial line port drilling equipment

Abstract

The application discloses a power distribution cabinet production inner part wire port drilling equipment, relates to the wire port drilling technical field, and particularly relates to a power distribution cabinet production inner part wire port drilling equipment, which comprises a base, the surface of the base is rotationally connected with a rotating disc one, the upper portion of the rotating disc one is provided with a hexagonal workbench, the surface of the hexagonal workbench is provided with six drilling grooves, the interior of the hexagonal workbench is provided with a cleaning plate, the upper portion of the hexagonal workbench is provided with a drilling machine assembly, and the power distribution cabinet production inner part wire port drilling equipment further comprises a conversion component, so that the hexagonal workbench can perform intermittent circumferential deflection movement. Through the cooperation between the structures, the hexagonal workbench can perform intermittent circumferential trajectory deflection movement, further drives the required wire distribution copper plate to perform intermittent deflection, can be matched with the intermittent vertical displacement of the drilling machine assembly, so that the equipment can continuously punch a plurality of wire distribution copper plates, and manpower is saved to a certain extent.

Description

Technical Field

[0001] This invention relates to the field of line hole drilling technology, specifically to a line hole drilling device for the production of power distribution cabinets. Background Technology

[0002] Distribution cabinets are divided into power distribution cabinets, lighting distribution cabinets, and metering cabinets, and are the final-level equipment in a power distribution system. Distribution cabinets are a general term for motor control centers. They are used in situations where the load is relatively dispersed and there are few circuits, while motor control centers are used in situations where the load is concentrated and there are many circuits. They distribute the electrical energy from a circuit of the upstream power distribution equipment to the nearest load. During the production of distribution cabinets, drilling is required for the wiring terminals, which are typically made of copper plates.

[0003] When manufacturing distribution cabinets, it is necessary to drill multiple holes in the copper plates inside the cabinet to separate the internal wiring. This ensures a neat and orderly internal circuit, facilitating subsequent operation and maintenance. Drilling multiple copper plates is typically required. Workers usually need to cut the copper material to the appropriate size, mark the drilling positions, and then manually hold the plates while drilling. This process is very time-consuming and labor-intensive when producing multiple distribution cabinets. Furthermore, the copper shavings generated after drilling are difficult to collect and clean, often resulting in scattered shavings. Therefore, the actual work efficiency needs improvement. Summary of the Invention

[0004] The purpose of this invention is to provide a drilling device for internal branch ports in the production of power distribution cabinets, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a drilling device for internal branch ports in the production of power distribution cabinets, comprising a base, a turntable rotatably connected to the surface of the base, a hexagonal worktable above the turntable, six drilling slots on the surface of the hexagonal worktable, a cleaning plate inside the hexagonal worktable, and a drilling machine assembly above the hexagonal worktable. The internal branch port drilling equipment for the production of the distribution cabinet also includes: A conversion component is disposed inside the base to enable the hexagonal worktable to perform intermittent circular deflection motion; The drilling component is positioned above the hexagonal worktable to allow the drilling machine assembly to perform intermittent vertical displacement. A cleaning component is disposed inside the hexagonal worktable to allow the cleaning plate to move horizontally back and forth. A drive component is disposed inside the base.

[0006] Optionally, the conversion component includes: A first fixed rod is fixedly connected at one end to the inner wall of the base, and a sliding frame is rotatably connected at the other end of the first fixed rod. A second fixed rod is fixedly connected to the surface of the sliding frame, and the arm of the second fixed rod is rotatably connected to the inner wall of the hexagonal workbench. A connecting rod is slidably connected to the inner wall of the sliding frame, and a rotating rod is rotatably connected to the arm of the connecting rod. A main shaft is fixedly connected to the other end of the rotating rod, and a U-shaped slide rod is fixedly connected to the end of the connecting rod. A rack is fixedly connected to the inner wall of the U-shaped slide rod, and six rods are rotatably connected to the inner wall of the hexagonal workbench. Gears are fixedly connected to the arms of the six rods, and the teeth of two of the gears mesh with the teeth of the rack.

[0007] Optionally, the mating drilling component includes: The housing has a surface rotatably connected to the surface of the hexagonal worktable. The end of the second fixed rod is rotatably connected to the inner wall of the housing. A second turntable is fixedly connected to the arm of the second fixed rod. A third turntable is rotatably connected to the surface of the housing. A belt is wound around the surfaces of the second and third turntables. A guide rod is fixedly connected to the inner wall of the housing. A threaded rod is slidably connected to the arm of the guide rod. The inner wall of the third turntable is threadedly connected to the arm of the threaded rod. A fixed plate is fixedly connected to the end of the threaded rod. The surface of the fixed plate is slidably connected to the drilling machine assembly.

[0008] Optionally, the cleaning component includes: Turntable four, the surface of turntable four is fixedly connected to the end of the rod, a pull rope is fixedly connected to the surface of turntable four, the other end of the pull rope is fixedly connected to a moving plate, two springs one are fixedly connected to the surface of the moving plate, the other end of the springs one is fixedly connected to the inner wall of the hexagonal workbench, three springs two are fixedly connected to the upper surface of the moving plate, the other end of the three springs two is fixedly connected to the surface of the cleaning plate, and a limit groove one is opened on the inner wall of each of the six drilling slots.

[0009] Optionally, the drive component includes: The motor has its surface fixedly connected to the inner wall of the base, and its output end is fixedly connected to the end of the main shaft.

[0010] Optionally, the inner wall of the base is provided with six limiting grooves, the inner wall of the rod is slidably connected with a slider, the surface of the slider can engage with the limiting grooves, the end of the slider is fixedly connected with a spring, and the other end of the spring is fixedly connected to the inner wall of the rod.

[0011] Optionally, the cleaning components are provided in six sets, and the six sets of cleaning components are symmetrically arranged in a circular pattern inside the hexagonal worktable.

[0012] Optionally, a collection box is provided below each of the six drill slots, and the six collection boxes are connected to the six drill slots through openings.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: I. This invention, through the cooperation of a fixed rod, a sliding frame, a connecting rod, and other structures, enables the hexagonal worktable to perform intermittent circular trajectory deflection motion, which further drives the copper strips to be drilled to perform intermittent deflection. This, in conjunction with the intermittent vertical displacement of the drilling machine components, allows the equipment to continuously drill multiple copper strips, thus saving manpower to a certain extent.

[0014] Second, through the cooperation of the cleaning plate, spring two, gears and other structures, this invention enables the cleaning plate to adhere to the lower surface of the copper plate under the elastic force of spring two after the drilling machine assembly drills a hole in the copper plate. Under the pushing action of spring one, the cleaning plate moves along the surface of the copper plate, thereby cleaning the copper shavings on the surface of the drilled groove and the copper plate into the collection box. This avoids the copper shavings flying around during the drilling process and facilitates the collection of the copper shavings after drilling is completed. Attached Figure Description

[0015] Figure 1 This is an axial view of the present invention; Figure 2 This is a detailed view of part of the structure of the present invention from a low angle; Figure 3 This is a cross-sectional view of a portion of the structure of the present invention from the right-side view. Figure 4 For the present invention Figure 3 Enlarged view of the structure at point A in the middle; Figure 5 For the present invention Figure 3 Enlarged view of the structure at point B; Figure 6 This is a top-view cross-sectional view of part of the structure of the present invention.

[0016] In the diagram: 1. Base; 2. Turntable 1; 3. Hexagonal worktable; 4. Drilling slot; 5. Cleaning plate; 6. Drilling machine assembly; 7. Fixed rod 1; 8. Sliding frame; 9. Fixed rod 2; 10. Connecting rod; 11. Rotating rod; 12. Spindle; 13. U-shaped slide bar; 14. Rack and pinion; 15. Rod; 16. Gear; 17. Housing; 18. Turntable 2; 19. Turntable 3; 20. Belt; 21. Guide rod; 22. Threaded rod; 23. Fixed plate; 24. Turntable 4; 25. Pull rope; 26. Moving plate; 27. Spring 1; 28. Spring 2; 29. ​​Limiting slot 1; 30. Motor; 31. Limiting slot 2; 32. Slider; 33. Spring 3; 34. Collection box. Detailed Implementation

[0017] 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.

[0018] Example 1, please refer to Figures 1 to 3 This invention provides a drilling device for internal branch ports in the production of power distribution cabinets, including a base 1, a turntable 2 rotatably connected to the surface of the base 1, a hexagonal worktable 3 above the turntable 2, six drilling slots 4 on the surface of the hexagonal worktable 3, a cleaning plate 5 inside the hexagonal worktable 3, and a drilling machine assembly 6 above the hexagonal worktable 3. The drilling device for internal branch ports in the production of power distribution cabinets also includes a conversion component, a drilling component, and a cleaning component. The conversion component is located inside the base 1, the drilling component is located above the hexagonal worktable 3, and the cleaning component is located inside the hexagonal worktable 3. Please see Figure 1 The cleaning components are arranged in six sets, which are symmetrically arranged in a circle inside the hexagonal workbench 3. The arrangement of the six sets of cleaning components allows for the cleaning of multiple copper plates when drilling holes, making the structure more reasonable.

[0019] The drive component is located inside the base 1.

[0020] More specifically, in this embodiment, during the production of the distribution cabinet, it is necessary to drill multiple holes in the copper plates inside the distribution cabinet to separate the internal circuitry, making the internal circuitry neat and orderly, facilitating subsequent operation and maintenance. When drilling the copper plates, multiple plates are typically required. Normally, workers need to cut the copper material to the appropriate size, mark the drilling positions, and then hold the plates in place before drilling. This process is very time-consuming and labor-intensive when producing multiple distribution cabinets, and the copper shavings generated under the plates after drilling are difficult to collect and clean, easily causing them to fly around. This device can be used to drill multiple copper plates. The operator first needs to fix the cut copper wires into the drilling slots 4, then start the drive unit. The drive unit operates, causing the conversion unit to operate, which in turn drives the hexagonal worktable 3 to rotate in a circular motion. This moves the copper wires to be drilled to the bottom of the drilling machine assembly 6. At this point, the hexagonal worktable 3 stops rotating and, in conjunction with the drilling unit, moves the drilling machine assembly 6 closer to the copper wires until it contacts and drills a hole. The hexagonal worktable 3 continues to rotate in a circular motion. Simultaneously, the cleaning unit operates, causing the cleaning plate 5 to move along the surface of the copper wires, cleaning the copper shavings adhering to the surface and those falling into the drilling slots 4 below. As the drive unit operates further, the cleaning plate 5 is pulled back to its initial position for cleaning after the next drilling.

[0021] Example 2, based on the above examples: Please see Figures 1 to 6 The conversion component includes a fixed rod 7, the end of which is fixedly connected to the inner wall of the base 1, and the other end of the fixed rod 7 is rotatably connected to a sliding frame 8. A fixed rod 9 is fixedly connected to the surface of the sliding frame 8. The arm of the fixed rod 9 is rotatably connected to the inner wall of the hexagonal workbench 3. A connecting rod 10 is slidably connected to the inner wall of the sliding frame 8. A rotating rod 11 is rotatably connected to the arm of the connecting rod 10. A main shaft 12 is fixedly connected to the other end of the rotating rod 11. A U-shaped slide rod 13 is fixedly connected to the end of the connecting rod 10. A rack and pinion 14 is fixedly connected to the inner wall of the U-shaped slide rod 13. Six rods 15 are rotatably connected to the inner wall of the hexagonal workbench 3. Gears 16 are fixedly connected to the arms of the six rods 15. The teeth of two gears 16 mesh with the teeth of the rack and pinion 14. Furthermore, in this embodiment, please refer to... Figure 6The driving component includes a motor 30, the surface of which is fixedly connected to the inner wall of the base 1, and the output end of the motor 30 is fixedly connected to the end of the spindle 12. By setting the motor 30, the spindle 12 can be driven to rotate, thereby driving other components to operate. Please see Figure 4 The inner wall of the base 1 is provided with six limiting grooves 31. The inner wall of the rod 15 is slidably connected to a slider 32. The surface of the slider 32 can engage with the limiting grooves 31. The end of the slider 32 is fixedly connected to a spring 33. The other end of the spring 33 is fixedly connected to the inner wall of the rod 15.

[0022] More specifically, in this embodiment, using Figure 2 Taking the direction shown as an example, driven by the motor 30, the rotating rod 11 is driven to rotate. When the rotating rod 11 rotates to the left, the connecting rod 10 is driven to move away from the upper gear 16 along the inner wall of the sliding frame 8, further causing the U-shaped slide rod 13 to move synchronously. After the U-shaped slide rod 13 disengages from the upper gear 16, the rotation of the rotating rod 11 can no longer drive the hexagonal worktable 3 to rotate in a circular arc. As the rotating rod 11 continues to rotate, when the rotating rod 11 rotates to the right, the connecting rod 10 is driven to rotate in an arc trajectory around the fixed rod 7, causing the sliding frame 8 to move synchronously. As the rotating rod 11 rotates further, it drives the connecting rod 10 to move along the inner wall of the sliding frame 8 towards the upper right gear 16, so that the connecting rod 10 drives the U-shaped slide rod 13 to contact the upper right gear 16 until the U-shaped bottom end of the U-shaped slide rod 13 contacts the gear 16. At this time, the rotating rod 11 rotates to the left again, which drives the upper right gear 16 to deflect, thereby driving the hexagonal worktable 3 to deflect, which drives the upper right drilling slot 4 and the copper plate inside that needs to be drilled to move to the bottom of the drilling machine assembly 6 to prepare for drilling. As the motor 30 continues to drive, it repeats in this way. By setting the spring 33, the slider 32 can be tightly engaged with the limiting groove 31 under the elastic force of the spring 33, so that the rod 15 can be limited to a certain extent, and the hexagonal worktable 3 can be more stable and less prone to shaking when it stops rotating in a circular manner. It is worth noting that by setting the limiting groove 2 31, the operator can insert the copper wire plate that needs to be drilled into the limiting groove 2 31, so that the copper wire plate is fixed to a certain extent, which is conducive to the drilling work.

[0023] Example 3, based on the above examples: Please see Figure 3The drilling component includes a housing 17, the surface of which is rotatably connected to the surface of the hexagonal workbench 3. The end of the second fixing rod 9 is rotatably connected to the inner wall of the housing 17. The arm of the second fixing rod 9 is fixedly connected to a turntable 18. The surface of the housing 17 is rotatably connected to a turntable 19. The surfaces of the second and third turntables 18 and 19 are wrapped with a belt 20. The inner wall of the housing 17 is fixedly connected to a guide rod 21. The arm of the guide rod 21 is slidably connected to a threaded rod 22. The inner wall of the third turntable 19 is threadedly connected to the arm of the threaded rod 22. The end of the threaded rod 22 is fixedly connected to a fixing plate 23. The surface of the fixing plate 23 is slidably connected to the drilling machine assembly 6. Please see Figures 3 to 5 The cleaning components include: a turntable 24, the surface of which is fixedly connected to the end of the rod 15, a pull rope 25 fixedly connected to the surface of the turntable 24, a movable plate 26 fixedly connected to the other end of the pull rope 25, two springs 27 fixedly connected to the surface of the movable plate 26, the other end of the springs 27 fixedly connected to the inner wall of the hexagonal workbench 3, three springs 28 fixedly connected to the upper surface of the movable plate 26, the other end of the three springs 28 fixedly connected to the surface of the cleaning plate 5, and limit grooves 29 provided on the inner walls of the six drilling slots 4. Please see Figure 2 Each of the six drilling slots 4 is equipped with a collection box 34. The six collection boxes 34 are connected to the six drilling slots 4 through openings. The copper shavings generated after drilling the copper plate can be collected by setting up the six collection boxes 34.

[0024] More specifically, in this embodiment, using Figure 2Taking the direction shown as an example, in the above motion description, the rotating rod 11 rotates to the left, and the U-shaped slide rod 13 and the connecting rod 10 are driven to rotate synchronously to the left around the fixed rod 7. The sliding frame 8 is driven to rotate synchronously, and the fixed rod 9 is driven to rotate synchronously, so that the turntable 18 rotates synchronously. Then, through the transmission of the belt 20, the turntable 19 is driven to rotate. Thus, under the action of the threaded connection, the threaded rod 22 moves along the arm of the guide rod 21 towards the copper plate, which drives the fixed plate 23 and the drilling machine assembly 6 to move synchronously. This allows the drilling machine assembly 6 to contact the copper plate and drill a hole. When the rotating rod 11 drives the U-shaped slide rod 13 to disengage from the upper gear 16... When touched, as the rotating rod 11 continues to rotate, it rotates to the right, which drives the connecting rod 10 to deflect to the right, causing the U-shaped slide rod 13 to deflect synchronously, and the sliding frame 8 to deflect synchronously. At this time, the hexagonal worktable 3 is stationary, and the turntable 3 19 is driven to deflect through the transmission of the belt 20. Thus, under the action of the threaded connection, the threaded rod 22 moves away from the copper plate along the arm of the guide rod 21, which drives the fixed plate 23 and the drilling machine assembly 6 to move synchronously, and further resets the drilling machine assembly 6 in preparation for the next drilling. With the rotation of the rotating rod 11 and this reciprocating motion, the device can continuously drill holes in the copper plate. When the U-shaped slide bar 13 moves closer to the gear 16, the gear 16 is driven to rotate due to the meshing of the teeth of the rack 14 and the gear 16. At this time, the drilling machine assembly 6 moves away from the copper plate, the rod 15 is driven to rotate synchronously, and the turntable 24 is driven to rotate synchronously, causing the pull rope 25 to be unwound. Under the elastic force of the spring 27, the moving plate 26 is pushed to move away from the turntable 24, and the cleaning plate 5 is driven to move synchronously, thus cleaning the surface of the drilled copper plate and the drilled surface. Copper shavings inside the slot 4 are pushed into the collection box 34 for collection. When the U-shaped slide bar 13 moves away from the gear 16, the gear 16 is driven to rotate in the opposite direction. At this time, the drilling machine assembly 6 moves towards the copper plate of the dividing line to drill holes. The rod 15 is driven to rotate synchronously, and the turntable 24 is driven to rotate synchronously, so that the pull rope 25 is wound up. This allows the moving plate 26 to overcome the elastic force of the spring 27 and be pulled towards the turntable 24. The cleaning plate 5 is driven to move synchronously to reset, ready for the next cleaning. It is worth noting that by setting the second spring 28, the cleaning plate 5 can be pushed to fit tightly against the copper wire plate that needs to be drilled under the elastic force of the second spring 28, which improves the cleaning effect of copper shavings adhering to the lower surface of the copper wire plate. It is worth noting that by sliding the fixing plate 23 to the drilling machine assembly 6, after one round of drilling of the copper wires in the hexagonal workbench 3 is completed, the operator can pull the drilling machine assembly 6 along the surface of the fixing plate 26 to change the position of the drilling machine assembly 6, so that a new round of drilling can be performed on the copper wires on the surface of the hexagonal workbench 3.

[0025] Working Principle: When using this internal branch port drilling equipment for distribution cabinet production, the operator first needs to fix the cut branch copper plates into the drilling slots 4, then start the motor 30. Through the operation of the motor 30, the rotating rod 11 rotates, which in turn drives the hexagonal worktable 3 to perform a circular deflection motion. This causes the branch copper plate to be drilled to be moved to the bottom of the drilling machine assembly 6. At this time, the hexagonal worktable 3 stops deflecting, and the drilling machine assembly 6 is moved closer to the branch copper plate until it contacts the branch copper plate and drills a hole. The hexagonal worktable 3 continues to perform a circular deflection. At the same time, the cleaning plate 5 is moved along the surface of the branch copper plate, cleaning the copper shavings adhering to the surface of the branch copper plate and the copper shavings that have fallen into the drilling slots 4 below. With the further drive of the motor 30, the cleaning plate 5 is pulled back to its initial position for cleaning after the next drilling.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drilling device for internal branch ports in the production of power distribution cabinets, comprising a base (1), characterized in that: The base (1) is rotatably connected to a turntable (2), and a hexagonal workbench (3) is provided above the turntable (2). The surface of the hexagonal workbench (3) is provided with six drilling slots (4). A cleaning plate (5) is provided inside the hexagonal workbench (3). A drilling machine assembly (6) is provided above the hexagonal workbench (3). The drilling equipment also includes: A conversion component is disposed inside the base (1) to enable the hexagonal worktable (3) to perform intermittent circumferential deflection motion; The drilling component is positioned above the hexagonal worktable (3) to allow the drilling machine assembly (6) to perform intermittent vertical displacement. A cleaning component is disposed inside the hexagonal workbench (3) so that the cleaning plate (5) can be moved horizontally back and forth. A driving component is disposed inside the base (1); The conversion component includes: A fixed rod (7) is fixedly connected at one end to the inner wall of the base (1). A sliding frame (8) is rotatably connected to the other end of the fixed rod (7). A fixed rod (9) is fixedly connected to the surface of the sliding frame (8). The arm of the fixed rod (9) is rotatably connected to the inner wall of the hexagonal workbench (3). A connecting rod (10) is slidably connected to the inner wall of the sliding frame (8). A rotating rod (1) is rotatably connected to the arm of the connecting rod (10). 1) The other end of the rotating rod (11) is fixedly connected to the main shaft (12), the end of the connecting rod (10) is fixedly connected to the U-shaped slide rod (13), the inner wall of the U-shaped slide rod (13) is fixedly connected to the rack row (14), the inner wall of the hexagonal workbench (3) is rotatably connected to six rods (15), the arms of the six rods (15) are all fixedly connected to gears (16), and the teeth of the two gears (16) mesh with the teeth of the rack row (14).

2. The drilling equipment for internal branch ports in the production of distribution cabinets according to claim 1, characterized in that: The mating drilling component includes: The housing (17) has its surface rotatably connected to the surface of the hexagonal workbench (3). The end of the second fixed rod (9) is rotatably connected to the inner wall of the housing (17). The arm of the second fixed rod (9) is fixedly connected to a turntable (18). The surface of the housing (17) is rotatably connected to a turntable (19). The surfaces of the second turntable (18) and the third turntable (19) are wrapped with a belt (20). The inner wall of the housing (17) is fixedly connected to a guide rod (21). The arm of the guide rod (21) is slidably connected to a threaded rod (22). The inner wall of the third turntable (19) is threadedly connected to the arm of the threaded rod (22). The end of the threaded rod (22) is fixedly connected to a fixing plate (23). The surface of the fixing plate (23) is slidably connected to the drilling machine assembly (6).

3. The drilling equipment for internal branch ports in the production of distribution cabinets according to claim 2, characterized in that: The cleaning component includes: Turntable 4 (24), the surface of turntable 4 (24) is fixedly connected to the end of the rod (15), a pull rope (25) is fixedly connected to the surface of turntable 4 (24), the other end of the pull rope (25) is fixedly connected to a moving plate (26), two springs 1 (27) are fixedly connected to the surface of the moving plate (26), the other end of the springs 1 (27) is fixedly connected to the inner wall of the hexagonal workbench (3), three springs 2 (28) are fixedly connected to the upper surface of the moving plate (26), the other end of the three springs 2 (28) is fixedly connected to the surface of the cleaning plate (5), and a limit groove 1 (29) is opened on the inner wall of each of the six drilling slots (4).

4. The drilling equipment for internal branch ports in the production of distribution cabinets according to claim 3, characterized in that: The driving component includes: The surface of the motor (30) is fixedly connected to the inner wall of the base (1), and the output end of the motor (30) is fixedly connected to the end of the main shaft (12).

5. The drilling equipment for internal branch ports in the production of distribution cabinets according to claim 4, characterized in that: The inner wall of the base (1) is provided with six limiting grooves (31). The inner wall of the rod (15) is slidably connected with a slider (32). The surface of the slider (32) can engage with the limiting grooves (31). The end of the slider (32) is fixedly connected with a spring (33). The other end of the spring (33) is fixedly connected to the inner wall of the rod (15).

6. The drilling equipment for internal branch ports in the production of distribution cabinets according to claim 5, characterized in that: The cleaning components are provided in six groups, and the six groups of cleaning components are symmetrically arranged in a circular pattern inside the hexagonal workbench (3).

7. A drilling device for internal branch ports in the production of distribution cabinets according to any one of claims 1-6, characterized in that: Each of the six drilled slots (4) is provided with a collection box (34) below it, and the six collection boxes (34) are connected to the six drilled slots (4) through openings.

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