High-speed steel roller casting, mold closing and rotating deslagging device

Abstract

The invention relates to the technical field of steel roller machining, in particular to a high-speed steel roller casting mold closing rotary slag removal device which comprises a slag removal cover, an installation connector installed in the slag removal cover and used for being connected with a mold end, a sealing ring installed below the installation connector, and a rotating shaft installed on one side of the slag removal cover. The sealing ring is used for improving the sealing performance of the deslagging cover; the slag removal mechanism is mounted in the slag removal cover, and the slag removal mechanism is used for removing waste slag in the mold; according to the scheme, the slag removal mechanism and the treatment mechanism are arranged, the slag removal mechanism and the treatment mechanism can be matched with treatment equipment to treat disintegrating slag while efficient slag removal can be achieved, meanwhile, stubborn disintegrating slag can be effectively prevented from damaging a tool bit through an overload clutch, and the service life of the tool bit is prolonged. And meanwhile, a plurality of long and narrow negative pressure cavity openings are formed, so that the deslagging efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel roll processing, in particular to a high-speed steel roll casting, mold closing, rotating and slag removing device. Background Art

[0002] In the vast system of modern steel rolling industry, high-speed steel rolls have become the leader in hot rolling roll materials due to their outstanding characteristics such as high hardness, excellent wear resistance and excellent thermal stability, and play an irreplaceable key role in the entire steel rolling process. It has a wide range of applications, from the rolling of ordinary steel to the precision processing of special steel, high-speed steel rolls have shown excellent performance, effectively guaranteeing the quality and production efficiency of steel. However, the production process of high-speed steel rolls is quite complicated, involving many precise links and strict requirements.

[0003] In the casting process of high-speed steel rollers, in order to greatly improve production efficiency, a special mold-jointing casting method is usually adopted, that is, multiple molds are stacked up and down to achieve one-time casting. Although this mold-joining process significantly improves production speed, it also brings a series of thorny problems. During the mold-joining process, the mold relies on the overlap of the end faces to achieve a tight connection. However, during casting, the high-temperature molten steel has extremely strong sputtering properties, and the sputtered molten steel quickly cools on the end face of the mold, forming firmly attached debris. These debris are like tiny obstacles, which seriously affect the overlap of the end faces when the mold is joined. Once the end face overlap deteriorates, the overall stability of the mold will decrease, and it is easy to shake and shift during the casting process. What's more serious is that the unevenness caused by these debris will also produce gaps between the molds, and the high-temperature molten steel will leak out along these gaps, which will not only lead to material waste, but also damage production equipment, affect product quality, and even cause production interruptions, bringing huge economic losses to the company.

[0004] Although the existing slag removal equipment can clean the waste slag inside the mold, it is difficult to process it simultaneously after removing the broken slag. It needs to be processed centrally with the help of other equipment after the slag removal is completed. This treatment method not only reduces the efficiency of slag removal, but also increases the time cost and equipment investment cost of the enterprise. Summary of the invention

[0005] The purpose of the present invention is to provide a high-speed steel roll casting mold rotary slag removal device, which solves the problems of low efficiency and high processing cost of existing slag removal devices through the cooperation of slag removal mechanisms and processing mechanisms.

[0006] To achieve the above object, the present invention provides the following technical solutions: A high-speed steel roller casting and mold-closing rotary slag removal device comprises a slag removal cover, one side of which is equipped with an equipment box, and further comprises: a mounting joint mounted inside the slag removal cover, the mounting joint being used to connect to a mold end, a sealing ring being mounted below the mounting joint, the sealing ring being used to improve the sealing performance of the slag removal cover; and a slag removal mechanism mounted inside the slag removal cover, the slag removal mechanism being used to remove waste slag inside the mold; and a processing mechanism mounted on the slag removal mechanism and the equipment box, the processing mechanism being used to process the waste slag.

[0007] Preferably, the slag removal mechanism includes a mounting plate, which is installed inside the slag removal cover, a servo motor is installed above the mounting plate, the output end of the servo motor is fixedly connected to a rotating shaft, and the end of the rotating shaft away from the servo motor passes through and is rotatably connected to the side wall of the equipment box.

[0008] Preferably, the output end of the servo motor is installed with a first bevel gear through a coupling, the outside of the first bevel gear is meshingly connected with a second bevel gear, the second bevel gear coaxially passes through the mounting plate and is fixedly connected with an electric push rod, the output end of the electric push rod is fixedly connected with a mounting head, an overload clutch is installed at the bottom of the mounting head, a connecting rod is installed on the outside of the mounting head, and a cutter head is detachably installed at the bottom of the connecting rod.

[0009] Preferably, a negative pressure chamber opening is provided between the mounting plate and the mounting joint, a negative pressure pump is installed inside the equipment box, a suction pipe is installed at the input end of the negative pressure pump, an end of the suction pipe away from the negative pressure pump is communicated with the negative pressure chamber opening, an output pipe is installed at the output end of the negative pressure pump, a nozzle is installed at the end of the output pipe away from the negative pressure pump, and the nozzle penetrates and extends into the interior of the equipment box.

[0010] Preferably, the processing mechanism includes a lower gear, which is fixedly connected to the rotating shaft, the outer part of the lower gear is meshingly connected to the upper gear, the outer part of the upper gear is meshingly connected to the pinion, the upper gear and the pinion are both coaxially fixedly connected to a rotating rod, the outer parts of the two rotating rods are fixedly connected to pressure rollers, and the two rotating rods are rotatably connected to the inner wall of the equipment box.

[0011] Preferably, a fixed block is installed inside the equipment box, and springs are installed on the tops of multiple fixed blocks. Filters are connected to the tops of multiple springs. The filter is located below two pressure rollers, and the filter is in an oblique state. The filter is slidably connected to the side wall of the equipment box.

[0012] Preferably, a driving wheel is fixedly connected to the outside of the rotating shaft, a vertical plate is installed inside the equipment box, and a driven wheel is rotatably connected to the outside of the vertical plate. Belts are synchronously provided on the outside of the driving wheel and the driven wheel, and a spiral rod is coaxially fixedly connected to the driven wheel. The other end of the spiral rod passes through the vertical plate and is rotatably connected to the side wall of the equipment box.

[0013] Preferably, a horizontal plate is installed inside the equipment box, and a first drawer is slidably connected to the top of the horizontal plate, the first drawer is used to accommodate dust filtered by the filter, and a guide groove is connected to the bottom of the filter, the guide groove is U-shaped, and the bottom of the guide groove passes through and extends to the bottom of the horizontal plate, and a cam is fixedly connected to the outside of the rotating shaft through the guide groove, and the cam is located below the filter.

[0014] Preferably, a baffle is installed below the spiral rod and inside the equipment box, a through hole is opened on the baffle, a second drawer is installed below the baffle, an inclined plate is installed inside the second drawer, and the inclined plate plays a role of guiding materials.

[0015] Preferably, an alarm is installed inside the equipment box and below the baffle, and the alarm is used to monitor the debris inside the second drawer and remind the user to clear it out regularly.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This scheme is provided with a slag removal mechanism, which drives the first bevel gear to rotate through the servo motor, and then drives the second bevel gear to rotate, thereby driving the cutter head on the electric push rod to rotate, so as to remove the debris inside the mold. At the same time, the electric push rod can adapt to the mold size to change the position of the cutter head. At the same time, the overload clutch can effectively prevent stubborn debris from damaging the cutter head, thereby protecting the safety of the equipment, thereby facilitating the reduction of production costs. At the same time, it is equipped with multiple narrow and long negative pressure cavities, which facilitates the negative pressure pump to adsorb the debris, thereby facilitating the improvement of the slag removal efficiency. 2. This solution is equipped with a processing mechanism, which drives the rotating shaft to rotate through the servo motor, thereby driving the lower gear to rotate, and then driving the upper gear and the pinion to rotate, so as to facilitate the crushing of the debris. At the same time, a filter is provided to facilitate the filtering of dust. At the same time, the filter is driven by the cam to vibrate, thereby preventing the shelf filter from being blocked. At the same time, the driving wheel and the driven wheel cooperate with each other to facilitate the transportation of the filtered debris, thereby preventing the accumulation of debris, and facilitating the treatment of waste residues, thereby improving the slag removal efficiency and reducing the production cost of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a cross-sectional view of the overall structure of the present invention; Figure 3 It is a front cross-sectional view of the overall structure of the present invention; Figure 4 It is a rear cross-sectional view of the overall structure of the present invention; Figure 5 It is a schematic diagram of the top surface of the slag removal mechanism of the present invention; Figure 6 It is a schematic diagram of the structure of the processing mechanism of the present invention; Figure 7 It is a front schematic diagram of the slag removal mechanism and the treatment mechanism of the present invention; Figure 8 For the present invention Figure 2 The corresponding schematic diagram is enlarged at A in the middle; In the attached drawings, the parts represented by the reference numerals are as follows: 1. slag removal cover; 2. equipment box; 3. mounting joint; 4. sealing ring; 5. slag removal mechanism; 6. processing mechanism; 7. servo motor; 8. rotating shaft; 9. first bevel gear; 10. second bevel gear; 11. mounting plate; 12. electric push rod; 13. mounting head; 14. overload clutch; 15. connecting rod; 16. cutter head; 17. negative pressure chamber opening; 18. negative pressure pump; 19. suction pipe; 20. , output pipe; 21, nozzle; 22, lower gear; 23, upper gear; 24, small gear; 25, rotating rod; 26, pressure roller; 27, driving wheel; 28, belt; 29, driven wheel; 30, cam; 31, screw rod; 32, fixing block; 33, spring; 34, filter; 35, guide groove; 36, first drawer; 37, horizontal plate; 38, alarm; 39, second drawer; 40, baffle; 41, through hole; 42, inclined plate; 43, vertical plate. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Embodiment 1: Figure 1-Figure 8 As shown, a high-speed steel roller casting and mold rotary slag removal device in the figure includes a slag removal cover 1, an equipment box 2 is installed on one side of the slag removal cover 1, and also includes: a mounting joint 3 installed inside the slag removal cover 1, the mounting joint 3 is used to connect the mold end, and a sealing ring 4 is installed below the mounting joint 3. The sealing ring 4 is made of high-quality sealing material and has excellent flexibility and sealing. When the device is running, it can fit closely to the surrounding parts and effectively block the entry of external impurities. The sealing ring 4 is used to improve the sealing performance of the slag removal cover 1, and a slag removal mechanism 5 installed inside the slag removal cover 1, the slag removal mechanism 5 is used to remove the waste slag inside the mold; and a processing mechanism 6 installed on the slag removal mechanism 5 and the equipment box 2, the processing mechanism 6 is used to process the waste slag.

[0020] For further information, see Figure 2 The slag removal mechanism 5 includes a mounting plate 11, which is mounted inside the slag removal cover 1. A servo motor 7 is mounted above the mounting plate 11. The servo motor 7 uses advanced control technology and high-performance motor components, and has precise speed control and strong torque output capabilities. The mounting plate 11 provides a stable support platform for the servo motor 7. The output end of the servo motor 7 is fixedly connected with a rotating shaft 8. The rotating shaft 8 is made of high-quality alloy steel, which not only has excellent rigidity, but also has good rotation performance. The end of the rotating shaft 8 away from the servo motor 7 penetrates and is rotatably connected to the side wall of the equipment box 2, ensuring smooth and stable power transmission.

[0021] For further information, please refer to Figure 7 The output end of the servo motor 7 is installed with a first bevel gear 9 through a coupling. The tooth shape of the first bevel gear 9 is specially designed, and the meshing accuracy is extremely high. The outside of the first bevel gear 9 is meshed and connected with a second bevel gear 10. The second bevel gear 10 coaxially penetrates the mounting plate 11 and is fixedly connected with an electric push rod 12. The electric push rod 12 has a built-in high-precision displacement sensor and a powerful drive motor, which can accurately control the telescopic stroke according to the command of the control system. The output end of the electric push rod 12 is fixedly connected with a mounting head 13, and an overload clutch 14 is installed at the bottom of the mounting head 13. A connecting rod 15 is installed on the outside of the mounting head 13, and a cutter head 16 is detachably installed at the bottom of the connecting rod 15. The cutter head 16 is made of a special alloy material with high hardness and wear resistance according to the slag removal requirements. It is extremely sharp and can efficiently crush and peel off the waste slag. When the cutter head 16 encounters too much resistance, the overload clutch 14 can protect the cutter head 16 and the entire device from damage.

[0022] In addition, please refer to Figure 3 and Figure 4 A negative pressure chamber opening 17 is provided between the mounting plate 11 and the mounting joint 3. The negative pressure chamber opening 17 is long and narrow, which is convenient for adsorbing the crushed slag. A negative pressure pump 18 is installed inside the equipment box 2. A suction pipe 19 is installed at the input end of the negative pressure pump 18. Flexible and wear-resistant pipes are selected. The end of the suction pipe 19 away from the negative pressure pump 18 is communicated with the negative pressure chamber opening 17. An output pipe 20 is installed at the output end of the negative pressure pump 18. A nozzle 21 is installed at the end of the output pipe 20 away from the negative pressure pump 18. The nozzle 21 penetrates and extends into the interior of the equipment box 2, so as to facilitate the treatment with the crushed slag.

[0023] Embodiment 2: Figure 1-Figure 8As shown, this is a further description of Example 1. In this embodiment, the processing mechanism 6 includes a lower gear 22, which is fixedly connected to the rotating shaft 8. The outer part of the lower gear 22 is meshedly connected to the upper gear 23, and the outer part of the upper gear 23 is meshedly connected to the pinion 24. An ingenious gear transmission system is formed between the three to accurately control the transmission of force and the change of rotation speed. The upper gear 23 and the pinion 24 are coaxially fixedly connected to a rotating rod 25. The rotating rod 25 is made of high-strength round steel and has good bending resistance. The outside of the two rotating rods 25 is fixedly connected to a pressure roller 26. The surface of the pressure roller 26 adopts a special rubber coating, which has a certain friction force and can effectively compact the waste slag without causing excessive wear to the equipment. The two rotating rods 25 are rotatably connected to the inner wall of the equipment box 2 to ensure flexible and stable rotation.

[0024] Specifically, see Figure 3 A fixed block 32 is installed inside the equipment box 2, and springs 33 are installed on the tops of multiple fixed blocks 32. The springs 33 are made of high-quality elastic material and have good elastic recovery performance and fatigue resistance. The tops of multiple springs 33 are connected to filter screens 34, which are used to filter fine dust. The filter screen 34 is located below the two pressure rollers 26. The filter screen 34 is in an oblique state. This inclined design allows the filtered waste residue to naturally slide down under the action of gravity. The filter screen 34 is slidably connected to the side wall of the equipment box 2.

[0025] Furthermore, a driving wheel 27 is fixedly connected to the outside of the rotating shaft 8, and a vertical plate 43 is installed inside the equipment box 2. The vertical plate 43 provides partition support for the components inside the equipment box 2. The outer side of the vertical plate 43 is rotatably connected to a driven wheel 29. Belts 28 are synchronously provided on the outside of the driving wheel 27 and the driven wheel 29. The belt 28 is made of high-strength, wear-resistant rubber material to ensure stable and reliable power transmission. The driven wheel 29 is coaxially fixedly connected to a screw rod 31. The outside of the screw rod 31 is provided with spiral blades, which can efficiently push the waste slag to the designated position. The other end of the screw rod 31 passes through the vertical plate 43 and is rotatably connected to the side wall of the equipment box 2.

[0026] For further information, see Figure 2 and Figure 3A transverse plate 37 is installed inside the equipment box 2, and a first drawer 36 is slidably connected to the top of the transverse plate 37. The structural design of the first drawer 36 is convenient for quick pulling, and its internal space is spacious. The first drawer 36 is used to accommodate dust filtered by the filter 34. The bottom of the filter 34 is connected to a guide groove 35. The guide groove 35 is U-shaped and made of a smooth metal plate, which can guide the waste residue to slide smoothly. The bottom of the guide groove 35 penetrates and extends to the bottom of the transverse plate 37. The outside of the rotating shaft 8 penetrates the guide groove 35 and is fixedly connected to a cam 30. The cam 30 is located below the filter 34. The cam 30 is located below the filter 34. The contour curve of the wheel 30 has been precisely calculated. When the shaft 8 rotates, the cam 30 can periodically knock the filter 34 to prevent the waste residue from clogging the filter 34. A baffle 40 is installed below the spiral rod 31 and inside the equipment box 2. A through hole 41 is opened on the baffle 40. The size of the through hole 41 matches the conveying requirements of the waste residue particles. A second drawer 39 is installed below the baffle 40. An inclined plate 42 is installed inside the second drawer 39. The inclined plate 42 plays a material guiding role. The inclined plate 42 plays a material guiding role and can guide the fallen waste residue to the bottom of the drawer for easy cleaning. An alarm 38 is installed inside the equipment box 2 and below the baffle 40. The alarm 38 is used to monitor the debris inside the second drawer 39. The alarm 38 uses advanced sensing technology and can monitor the accumulation height of the debris inside the second drawer 39 in real time. When the set threshold is reached, an alarm is issued in time to remind the user to clean it regularly to ensure the continuous and efficient operation of the device.

[0027] To sum up, when using this device, first install the cutter head 16, then install the slag removal cover 1 on the mold through the installation joint 3 and the sealing ring 4, and then start the servo motor 7. The servo motor 7 drives the rotating shaft 8 to rotate through the coupling, and then drives the first bevel gear 9 to rotate, thereby driving the second bevel gear 10 to rotate, and then drives the connecting rod 15 and the cutter head 16 outside the installation head 13 to rotate, and then remove the slag inside the mold. At the same time, the overload clutch 14 will protect the cutter head 16. At the same time, start the negative pressure pump 18, and the crushed slag enters the suction pipe 19 through the negative pressure chamber opening 17, and then is discharged into the equipment box 2 through the output pipe 20 and the nozzle 21. At the same time, the lower gear 22 outside the rotating shaft 8 rotates, thereby driving the upper gear 23 to rotate synchronously. The upper gear 23 is driven to rotate, thereby synchronously driving the two rotating rods 25 and the pressure roller 26 to rotate synchronously, thereby crushing the debris; at the same time, the dust falls into the first drawer 36 through the filter screen 34, and the debris enters the surface of the spiral rod 31 through the guide groove 35. At the same time, the cam 30 outside the rotating shaft 8 hits the filter screen 34 to prevent the accumulation of debris on the surface of the filter screen 34. At the same time, the driving wheel 27 rotates, and the driven wheel 29 is driven to rotate through the belt 28, thereby driving the spiral rod 31 to transport the debris, which falls into the second drawer 39 through the through hole 41 along the inclined plate 42. The alarm 38 will monitor the debris inside the second drawer 39. When the debris inside the second drawer 39 is full, the staff can be reminded to clear it in time.

[0028] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A high-speed steel roll casting mold rotary slag removal device, comprising a slag removal cover (1), wherein a device box (2) is installed on one side of the slag removal cover (1); It is characterized in that Also includes: A mounting joint (3) installed inside the slag removal cover (1), the mounting joint (3) being used to connect to a mold end, a sealing ring (4) being installed below the mounting joint (3), the sealing ring (4) being used to improve the sealing performance of the slag removal cover (1); and, a slag removal mechanism (5) installed inside the slag removal cover (1), the slag removal mechanism (5) being used to remove waste slag inside the mold; and A processing mechanism (6) installed on the slag removal mechanism (5) and the equipment box (2), wherein the processing mechanism (6) is used to process the waste slag.

2. A high-speed steel roll casting mold-clamping rotary slag removal device according to claim 1, characterized in that: The slag removal mechanism (5) comprises a mounting plate (11), wherein the mounting plate (11) is mounted inside the slag removal cover (1), a servo motor (7) is mounted above the mounting plate (11), an output end of the servo motor (7) is fixedly connected to a rotating shaft (8), and an end of the rotating shaft (8) away from the servo motor (7) penetrates through and is rotatably connected to a side wall of the equipment box (2).

3. A high-speed steel roll casting mold-clamping rotary slag removal device according to claim 2, characterized in that: The output end of the servo motor (7) is mounted with a first bevel gear (9) via a coupling, the first bevel gear (9) is meshingly connected to the outside with a second bevel gear (10), the second bevel gear (10) coaxially passes through the mounting plate (11) and is fixedly connected to an electric push rod (12), the output end of the electric push rod (12) is fixedly connected to a mounting head (13), an overload clutch (14) is mounted at the bottom of the mounting head (13), a connecting rod (15) is mounted on the outside of the mounting head (13), and a cutter head (16) is detachably mounted at the bottom of the connecting rod (15).

4. The high-speed steel roll casting mold rotary slag removal device according to claim 2, characterized in that: A negative pressure chamber opening (17) is provided between the mounting plate (11) and the mounting joint (3); a negative pressure pump (18) is installed inside the equipment box (2); a suction pipe (19) is installed at the input end of the negative pressure pump (18); an end of the suction pipe (19) away from the negative pressure pump (18) is in communication with the negative pressure chamber opening (17); an output pipe (20) is installed at the output end of the negative pressure pump (18); a nozzle (21) is installed at the end of the output pipe (20) away from the negative pressure pump (18); the nozzle (21) penetrates and extends into the interior of the equipment box (2).

5. The high-speed steel roll casting mold rotary slag removal device according to claim 1, characterized in that: The processing mechanism (6) comprises a lower gear (22), the lower gear (22) being fixedly connected to the rotating shaft (8), the outer portion of the lower gear (22) being meshingly connected to an upper gear (23), the outer portion of the upper gear (23) being meshingly connected to a pinion gear (24), the upper gear (23) and the pinion gear (24) being coaxially fixedly connected to a rotating rod (25), the outer portions of the two rotating rods (25) being fixedly connected to a pressure roller (26), and the two rotating rods (25) being rotatably connected to the inner wall of the equipment box (2).

6. A high-speed steel roll casting mold-clamping rotary slag removal device according to claim 5, characterized in that: A fixed block (32) is installed inside the equipment box (2), a plurality of springs (33) are installed on the top of the fixed blocks (32), a filter screen (34) is connected to the top of the plurality of springs (33), the filter screen (34) is located below the two pressure rollers (26), the filter screen (34) is in an oblique cutting state, and the filter screen (34) is slidably connected to the side wall of the equipment box (2).

7. The high-speed steel roll casting mold rotary slag removal device according to claim 2, characterized in that: The outside of the rotating shaft (8) is fixedly connected to a driving wheel (27), the inside of the equipment box (2) is installed with a vertical plate (43), the outside of the vertical plate (43) is rotatably connected to a driven wheel (29), the outsides of the driving wheel (27) and the driven wheel (29) are synchronously provided with belts (28), the driven wheel (29) is coaxially fixedly connected to a spiral rod (31), and the other end of the spiral rod (31) passes through the vertical plate (43) and is rotatably connected to the side wall of the equipment box (2).

8. The high-speed steel roll casting mold-clamping rotary slag removal device according to claim 6, characterized in that: A transverse plate (37) is installed inside the equipment box (2), and a first drawer (36) is slidably connected to the top of the transverse plate (37). The first drawer (36) is used to accommodate dust filtered by the filter (34). A guide groove (35) is connected to the bottom of the filter (34). The guide groove (35) is U-shaped. The bottom of the guide groove (35) passes through and extends to the bottom of the transverse plate (37). The outside of the rotating shaft (8) passes through the guide groove (35) and is fixedly connected to a cam (30). The cam (30) is located below the filter (34).

9. The high-speed steel roll casting mold-clamping rotary slag removal device according to claim 7, characterized in that: A baffle (40) is installed below the spiral rod (31) and inside the equipment box (2), and a through hole (41) is opened on the baffle (40). A second drawer (39) is installed below the baffle (40), and an inclined plate (42) is installed inside the second drawer (39), and the inclined plate (42) plays a role of guiding materials.

10. A high-speed steel roll casting mold-clamping rotary slag removal device according to claim 9, characterized in that: An alarm (38) is installed inside the equipment box (2) and below the baffle (40). The alarm (38) is used to monitor the debris inside the second drawer (39) and remind the user to clear it out at a regular time.

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