Automatic conveying device for microwave dry heating of construction waste

Abstract

The present application belongs to the slag conveying device, and relates to an automatic conveying device for microwave dry heating of construction slag, which comprises a base, a microwave drying machine, a belt conveyor, a servo motor, a chopping mechanism and a cleaning mechanism, the base top is provided with the microwave drying machine, the base is provided with the belt conveyor, the base is provided with the servo motor, the output shaft of the servo motor is connected with the transmission shaft of the belt conveyor, and the base is provided with the chopping mechanism for chopping the slag and the cleaning mechanism for cleaning the belt conveyor. After the slag is dried, water can be injected into the injection pipe through the water pipe, the water in the injection pipe enters the spray pipe through the feeding frame, and then the water is sprayed on the belt conveyor through the spray pipe to clean the belt conveyor, so that the effect of automatically cleaning the belt conveyor is achieved.

Description

Technical Field

[0001] This invention pertains to waste soil conveying devices, specifically an automated conveying device for microwave drying and heating of construction waste soil. Background Technology

[0002] Construction waste refers to the general term for solid waste generated during construction activities, mainly including construction spoil, construction mud, construction waste, demolition waste, and decoration waste. Its sources include the construction, expansion, renovation, and demolition of various buildings, structures, and pipelines, as well as excavated soil, materials, and other waste generated during residential decoration and renovation. Construction spoil, as a significant component of construction waste, requires dehydration treatment using microwave dry heat treatment technology to meet the requirements for subsequent resource utilization.

[0003] Currently, in the process of microwave drying and heat treatment of construction waste, conveyor belts are used to transport the waste to the microwave drying equipment for drying. However, during the conveyor belt transport process, the waste tends to stick to the conveyor belt. During continuous operation, it is necessary to frequently stop the machine to clean the waste adhering to the conveyor belt, so as to avoid the excessive amount of waste adhering to the conveyor belt affecting the normal operation of the equipment. This results in low overall operating efficiency. Summary of the Invention

[0004] In view of this, the present invention provides an automated conveying device for microwave drying and heating of construction waste.

[0005] The technical implementation of the present invention is as follows: an automated conveying device for microwave drying and heating of construction waste includes a base, a microwave dryer, a belt conveyor, a servo motor, a shredding mechanism, and a cleaning mechanism. The microwave dryer is installed on the top of the base, the belt conveyor is installed on the base, the servo motor is installed on the base, the output shaft of the servo motor is connected to the drive shaft of the belt conveyor, and the base is provided with a shredding mechanism for shredding the construction waste and a cleaning mechanism for cleaning the belt conveyor.

[0006] Furthermore, the shredding mechanism includes a support plate, a rotating shaft, a drive motor, and crushing wheels. The support plate is connected to the base, and the rotating shaft is rotatably connected to the support plate. The drive motor is installed on the base, and the output shaft of the drive motor is connected to the rotating shaft. Multiple crushing wheels are evenly spaced on the rotating shaft, and the upper part of the crushing wheels contacts the bottom of the belt conveyor.

[0007] Furthermore, the cleaning mechanism includes a mounting plate, an injection pipe, a spray pipe, a feeding frame, a collection frame, and a filter plate. The mounting plate is connected to the bottom of the base and is located below the belt conveyor. A collection frame is provided on the mounting plate, and a filter plate is provided at the bottom of the collection frame. An injection pipe is connected to the base, and a feeding frame is connected to the injection pipe. The feeding frame is connected to the mounting plate, and multiple spray pipes are evenly spaced on the top of the feeding frame.

[0008] Furthermore, the mounting plate is inclined to guide the flushed debris.

[0009] Furthermore, it also includes a vibration motor, which is mounted on the support plate.

[0010] Furthermore, it also includes a scraping mechanism, which comprises a cleaning scraper, a connecting plate, a connecting rod, a turntable, a lever, a connecting rod, and an extension shaft. The cleaning scraper is slidably connected to the base and contacts the bottom of the belt conveyor. The top of the cleaning scraper is connected to the connecting plate, which has an inclined groove. The turntable is connected to the front side of the rotating shaft. The connecting rod is slidably connected to the base and has an extension shaft located within the inclined groove. Two connecting rods are connected to the bottom of the connecting rod. A lever is connected to the eccentric position of the turntable and is located between the two connecting rods.

[0011] Furthermore, it also includes a leveling mechanism, which includes a protective frame, a rotating wheel, and a belt drive assembly. The protective frame is connected to the top of the base, and the rotating wheel is rotatably connected to the protective frame. The rotation of the rotating wheel can flatten the slag on the belt conveyor. A belt drive assembly is provided between the rotating wheel and the output shaft of the servo motor.

[0012] Furthermore, it also includes a sorting mechanism, which includes magnets, a recycling frame and a scraper. Magnets are evenly embedded in the rotating wheel along the circumference. The recycling frame is connected to the protective frame, and the scraper is connected to the lower part of the recycling frame. The scraper is attached to the rotating wheel and the magnets.

[0013] Furthermore, it also includes a crushing mechanism, which includes a shovel plate, an electric drum, sliding strips, a fixed plate, an elastic element one, a movable plate, a contact shaft, a guide plate, and an elastic element two. An electric drum is installed at the middle position of the upper part of the base. Multiple shovel plates are evenly spaced along the circumference of the electric drum. Multiple sliding strips are evenly spaced along the circumference of the electric drum. Multiple sets of fixed plates are evenly arranged along the circumference of the electric drum. Each set of fixed plates has multiple plates. Multiple movable plates are evenly connected to the sliding strips. The movable plates and fixed plates are staggered. An elastic element one connects the sliding strips to the electric drum. A contact shaft is slidably connected to the leftmost movable plate. An elastic element two connects the contact shaft to the movable plate. Guide plates are connected to the front and rear sides of the upper part of the base. The guide plates are located at the movement trajectory of the contact shaft.

[0014] The present invention has the following advantages: 1. After the slag is dried, water can be injected into the injection pipe through the water pipe. The water injected into the injection pipe will enter the spray pipe through the feeding frame, and then spray the water onto the belt conveyor through the spray pipe to clean the belt conveyor and avoid the need to clean the slag adhering to the belt conveyor, so as to achieve the effect of automatically cleaning the belt conveyor.

[0015] 2. After the slag is added, the slag will pass through a rotating wheel. The rotation of the wheel can compress the slag and flatten it, making the drying of the slag more uniform and achieving a better drying effect. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a schematic diagram of the shredding mechanism of the present invention.

[0018] Figure 3 This is a schematic diagram of the first structure of the cleaning mechanism of the present invention.

[0019] Figure 4 This is a schematic diagram of a second structure of the cleaning mechanism of the present invention.

[0020] Figure 5 This is a schematic diagram of the structure of the vibration motor and the support plate of the present invention.

[0021] Figure 6 This is a schematic diagram of the scraping mechanism of the present invention.

[0022] Figure 7 This is a schematic diagram of the cleaning scraper of the present invention.

[0023] Figure 8 This is a schematic diagram of the connecting plate, connecting rod, and extension shaft of the present invention.

[0024] Figure 9 This is a schematic diagram of the flattening mechanism of the present invention.

[0025] Figure 10 This is a schematic diagram of the first structure of the sorting mechanism of the present invention.

[0026] Figure 11 This is a schematic diagram of the second structure of the sorting mechanism of the present invention.

[0027] Figure 12 This is a schematic diagram of the first structure of the crushing mechanism of the present invention.

[0028] Figure 13 This is a schematic diagram of the second structure of the crushing mechanism of the present invention.

[0029] Figure 14 This is a cross-sectional view of the crushing mechanism of the present invention.

[0030] Figure 15 For the present invention Figure 14 Enlarged view of part A in the image.

[0031] In the attached diagrams: 1: Base, 2: Microwave dryer, 3: Belt conveyor, 4: Servo motor, 51: Support plate, 52: Rotating shaft, 53: Drive motor, 54: Crushing wheel, 61: Mounting plate, 62: Liquid injection pipe, 63: Spray pipe, 64: Feeding frame, 65: Collection frame, 66: Filter plate, 7: Vibration motor, 71: Cleaning scraper, 72: Connecting plate, 73: Connecting rod, 74: Turntable, 75: Actuating rod, 76: Connecting rod, 77: Extension shaft, 81: Protective frame, 82: Rotating wheel, 83: Belt drive assembly, 91: Magnet, 92: Recycling frame, 93: Scraper, 101-Shovel plate, 102-Electric roller, 103-Sliding strip, 104-Fixed plate, 105-Elastic component one, 106-Moving plate, 107-Contact shaft, 108-Guide plate, 109-Elastic component two. Detailed Implementation

[0032] 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.

[0033] An automated conveying device for microwave drying and heating of construction waste, such as... Figures 1-4As shown, it includes a base 1, a microwave dryer 2, a belt conveyor 3, a servo motor 4, a shredding mechanism, and a cleaning mechanism. The microwave dryer 2 is installed on the top of the base 1, the belt conveyor 3 is installed on the base 1, the servo motor 4 is installed on the left side of the base 1, and the output shaft of the servo motor 4 is connected to the drive shaft of the belt conveyor 3 so that the servo motor 4 can drive the belt conveyor 3 to operate. The base 1 is provided with a shredding mechanism for shredding the slag and a cleaning mechanism for cleaning the belt conveyor 3.

[0034] like Figure 2 and Figure 3 As shown, the shredding mechanism includes a support plate 51, a rotating shaft 52, a drive motor 53, and crushing wheels 54. The support plate 51 is connected to the lower right side of the base 1, and the rotating shaft 52 is rotatably connected to the left side of the support plate 51. The drive motor 53 is installed on the rear right side of the base 1. The output shaft of the drive motor 53 is connected to the rotating shaft 52 so that the drive motor 53 can drive the rotating shaft 52 to rotate. Multiple crushing wheels 54 are evenly spaced on the rotating shaft 52, and the upper part of the crushing wheels 54 contacts the bottom of the belt conveyor 3.

[0035] like Figure 3 and Figure 4 As shown, the cleaning mechanism includes a mounting plate 61, an injection pipe 62, a spray pipe 63, a feeding frame 64, a collection frame 65, and a filter plate 66. The mounting plate 61 is connected to the bottom right side of the base 1 and is located below the right side of the belt conveyor 3. The collection frame 65 is provided on the right side of the mounting plate 61 and is detachable. The filter plate 66 is provided at the bottom of the collection frame 65. The injection pipe 62 is connected to the lower right side of the base 1 and is connected to the feeding frame 64. The feeding frame 64 is connected to the mounting plate 61. Multiple spray pipes 63 are evenly spaced on the top of the feeding frame 64. The mounting plate 61 is inclined with the left side higher than the right side to guide the flushed slag.

[0036] This device can be used when it is necessary to transport construction waste. In operation, the construction waste is first added to the left side of the belt conveyor 3. Then, the servo motor 4 is controlled to drive the belt conveyor 3 to rotate. As the belt conveyor 3 rotates, it transports the construction waste to the right. During this process, the construction waste passes under the microwave dryer 2, where it is dried. After drying, the belt conveyor 3 transports the construction waste to the right side of the equipment. When the belt conveyor 3 reaches the bend, some construction waste will fall off, while some will remain on the belt conveyor 3. The construction waste adhering to the belt conveyor 3 will continue to move and come into contact with the crushing wheel 54. At this point, the drive motor 53 can be controlled to rotate the shaft 52 and the crushing wheel 54. The rotation of the crushing wheel 54 will crush the construction waste. The crushed construction waste and the waste falling from the bend will fall into the support plate 51. A collection device can be placed under the support plate 51. The slag at point 51 will enter the collection equipment for collection. Even after crushing, some slag will still adhere to the belt conveyor 3. At this time, the water pipe can be connected to the spray pipe 63, and then the water pipe can be opened to inject water into the injection pipe 62. The water in the injection pipe 62 will enter the feeding frame 64, and finally spray out through the spray pipe 63. The sprayed water will spray onto the bottom of the belt conveyor 3, thereby flushing the belt conveyor 3 and washing off the slag adhering to the belt conveyor 3. The washed-off slag will fall onto the mounting plate 61, and then slide down the mounting plate 61 to the lower right to the collection frame 65 for collection. The slag will remain in the collection frame 65, while the water will be discharged through the filter plate 66. In this way, the device can be used to transport and process slag, and after the transportation is completed, the slag adhering to the belt conveyor 3 can be cleaned to prevent slag from adhering to the belt conveyor 3.

[0037] like Figure 5 As shown, it also includes a vibration motor 7. The vibration motor 7 is installed on the support plate 51. The vibration motor 7 can drive the support plate 51 to vibrate, which helps to shake off the slag on the support plate 51.

[0038] When the excavated soil falls onto the support plate 51, the vibration motor 7 can be controlled to operate. When the vibration motor 7 is operating, it can drive the support plate 51 to vibrate, which helps to shake off the excavated soil.

[0039] like Figures 6-8As shown, it also includes a scraping mechanism, which includes a cleaning scraper 71, a connecting plate 72, a connecting rod 73, a turntable 74, a toggle rod 75, a connecting rod 76, and an extension shaft 77. The cleaning scraper 71 is slidably connected to the right side of the base 1. The cleaning scraper 71 can slide back and forth along the base 1. The cleaning scraper 71 contacts the bottom of the belt conveyor 3 so that the movement of the cleaning scraper 71 can scrape off the slag adhering to the belt conveyor 3. The top front side of the cleaning scraper 71 is connected to the connecting plate 72, which has an inclined groove. The front of the rotating shaft 52 A turntable 74 is connected to the side of the base 1. A connecting rod 73 is slidably connected to the right side of the front side of the base 1. An extension shaft 77 is provided on the lower left side of the connecting rod 73. The extension shaft 77 is located in the inclined groove so that the connecting rod 73 can squeeze the inclined groove through the extension shaft 77 when it moves, thereby driving the connecting plate 72 to move back and forth. Two connecting rods 76 are connected to the bottom right side of the connecting rod 73. A toggle rod 75 is connected to the eccentric position of the turntable 74. The toggle rod 75 is located between the two connecting rods 76 so that the rotation of the toggle rod 75 can contact the connecting rods 76 and push the connecting rods 76 to move, thereby driving the connecting rod 73 to move.

[0040] When the rotating shaft 52 rotates, it drives the turntable 74 to rotate. The rotation of the turntable 74 drives the actuating rod 75 to rotate. When the actuating rod 75 rotates, it first contacts the connecting rod 76 on the right and pushes the connecting rod 76 to move to the right. Then, the actuating rod 75 continues to rotate and contacts the connecting rod 76 on the left and pushes the connecting rod 76 to move to the left. This drives the connecting rod 73 to move left and right. When the connecting rod 73 moves, it drives the extension shaft 77 to move back and forth. When the extension shaft 77 moves back and forth, it repeatedly squeezes the inclined groove, thereby driving the connecting plate 72 to move back and forth through the inclined groove. When the connecting plate 72 moves back and forth, it drives the cleaning scraper 71 to move back and forth. Since the cleaning scraper 71 is in contact with the belt conveyor 3, when the cleaning scraper 71 moves back and forth, in conjunction with the water spraying from the spray pipe 63 and the scraping action of the cleaning scraper 71, the cleaning effect of the belt conveyor 3 can be better achieved.

[0041] like Figure 9 and Figure 10 As shown, it also includes a leveling mechanism, which includes a protective frame 81, a rotating wheel 82, and a belt drive assembly 83. The protective frame 81 is connected to the top left side of the base 1, and the rotating wheel 82 is rotatably connected to the lower right side of the protective frame 81. The rotation of the rotating wheel 82 can flatten the slag on the belt conveyor 3. A belt drive assembly 83 is provided between the front side of the rotating wheel 82 and the output shaft of the servo motor 4 so that the operation of the servo motor 4 will drive the rotating wheel 82 to rotate.

[0042] When the slag is added to the left side of the belt conveyor 3, it can be transported to the position of the belt conveyor 3 within the protective frame 81. When the servo motor 4 is running, it can drive the rotating wheel 82 to rotate through the belt drive assembly 83. When the belt conveyor 3 transports the slag, the slag will move to the bottom of the rotating wheel 82. At this time, the rotation of the rotating wheel 82 can spread the slag evenly on the belt conveyor 3, so that when the microwave dryer 2 dries the slag, the heating area of ​​the slag is wider and the drying effect is better. In this way, the drying effect of the slag can be improved.

[0043] like Figure 10 and Figure 11 As shown, it also includes a sorting mechanism, which includes a magnet 91, a recycling frame 92, and a scraper 93. Magnets 91 are evenly spaced and embedded on the circumferential axis of the rotating wheel 82. The magnets 91 can attract away the iron substances contained in the slag. The recycling frame 92 is connected to the right side of the protective frame 81 and is located to the right of the rotating wheel 82. The scraper 93 is connected to the lower part of the recycling frame 92. The scraper 93 is attached to the rotating wheel 82 and the magnets 91. When the rotating wheel 82 and the magnets 91 rotate, the scraper 93 can scrape off the iron substances attached to the magnets 91.

[0044] When the rotating wheel 82 rotates, it can drive the magnet 91 to rotate. When the magnet 91 rotates, it can attract the iron material attached to the slag. After the magnet 91 attracts the iron material, it only needs to rotate to rotate with the scraper 93. The scraper 93 can scrape the iron material attached to the magnet 91 into the recycling frame 92, thereby achieving the effect of sorting iron material and slag.

[0045] like Figure 12 and Figure 15As shown, it also includes a crushing mechanism, which includes a shovel plate 101, an electric drum 102, sliding strips 103, a fixed plate 104, an elastic element 105, a movable plate 106, a contact shaft 107, a guide plate 108, and an elastic element 109. An electric drum 102 is installed at the upper center of the base 1. Multiple shovel plates 101 are evenly spaced along the circumference of the electric drum 102. The rotation of the shovel plates 101 can shovel up the slag. Multiple sliding strips 103 are evenly spaced and slidably connected to the electric drum 102. Multiple sets of fixed plates 104 are evenly arranged along the circumference of the electric drum 102, with multiple plates in each set fixedly connected to the electric drum 102. Multiple movable plates 106 are evenly connected to the sliding strips 103. Plate 106 and fixed plate 104 are staggered. The slag scooped up by shovel plate 101 will enter between movable plate 106 and fixed plate 104. The movement of movable plate 106 and cooperation with fixed plate 104 can disperse the slag. An elastic element 105 is connected between sliding strip 103 and electric roller 102. The elastic element 105 is a connecting spring. A contact shaft 107 is slidably connected on the leftmost movable plate 106. An elastic element 2 109 is connected between contact shaft 107 and movable plate 106. The elastic element 2 109 is a buffer spring. Guide plates 108 are connected to the front and rear sides of the upper part of the base 1. The guide plates 108 are located at the movement trajectory of contact shaft 107 so that the movement of contact shaft 107 can contact guide plate 108 and be squeezed and moved by guide plate 108.

[0046] When the belt conveyor 3 transports the slag, the electric drum 102 can be controlled to rotate. When the electric drum 102 rotates, it drives the shovel plate 101 to rotate. The shovel plate 101, when rotating, shovels the slag into the gap between the shovel plate 101 and the electric drum 102. At this time, the slag will be located between the movable plate 106 and the fixed plate 104. When the electric drum 102 rotates, it also drives the movable plate 106 and the fixed plate 104 to rotate together. When the leftmost movable plate rotates, it drives the contact shaft 107 to rotate together. When the contact shaft 107 rotates, it can contact the guide plate 108, thus being squeezed by the guide plate 108, causing the contact shaft 107 to move. When the contact shaft 107 moves, it drives the movable plate 106 and the fixed plate 104 to rotate together. The sliding bar 103 moves together, the elastic element 105 is compressed, and the movable plate 106, when moving, cooperates with the fixed plate 104 to crush the slag. Then the electric roller 102 continues to rotate, so that the crushed slag faces downward. At this time, the slag will fall back into the belt conveyor 3 through the gap between the shovel plates 101 for conveying. When the contact shaft 107 rotates to face downward, it will contact the belt conveyor 3 and be squeezed inward by the belt conveyor 3. The elastic element 109 is compressed, thereby avoiding a hard collision between the contact shaft 107 and the belt conveyor 3. The elastic element 109 can play a buffering role. In this way, the slag can be crushed while being conveyed, avoiding slag clumping and hindering the drying process.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. An automated conveying device for microwave drying and heating of construction waste, characterized in that: It includes a base (1), a microwave dryer (2), a belt conveyor (3), a servo motor (4), a shredding mechanism, and a cleaning mechanism. The microwave dryer (2) is installed on the top of the base (1), the belt conveyor (3) is installed on the base (1), the servo motor (4) is installed on the base (1), the output shaft of the servo motor (4) is connected to the drive shaft of the belt conveyor (3), and the base (1) is provided with a shredding mechanism for shredding the slag and a cleaning mechanism for cleaning the belt conveyor (3). The shredding mechanism includes a support plate (51), a rotating shaft (52), a drive motor (53), and crushing wheels (54). The support plate (51) is connected to the base (1), and the rotating shaft (52) is rotatably connected to the support plate (51). The drive motor (53) is installed on the base (1), and the output shaft of the drive motor (53) is connected to the rotating shaft (52). Multiple crushing wheels (54) are evenly spaced on the rotating shaft (52), and the upper part of the crushing wheel (54) contacts the bottom of the belt conveyor (3). The cleaning mechanism includes an installation plate (61), an injection pipe (62), a spray pipe (63), a feeding frame (64), a collection frame (65), and a filter plate (66). The base (1) is connected to the bottom of the installation plate (61), which is located below the belt conveyor (3). The installation plate (61) is provided with a collection frame (65), and the bottom of the collection frame (65) is provided with a filter plate (66). The base (1) is connected to the injection pipe (62), and the injection pipe (62) is connected to the feeding frame (64). The feeding frame (64) is connected to the installation plate (61), and multiple spray pipes (63) are evenly spaced on the top of the feeding frame (64). The installation plate (61) is inclined to guide the flushed slag. It also includes a vibration motor (7), which is mounted on the support plate (51). It also includes a scraping mechanism, which includes a cleaning scraper (71), a connecting plate (72), a connecting rod (73), a turntable (74), a toggle rod (75), a connecting rod (76), and an extension shaft (77). The cleaning scraper (71) is slidably connected to the base (1). The cleaning scraper (71) is in contact with the bottom of the belt conveyor (3). The top of the cleaning scraper (71) is connected to the connecting plate (72). The connecting plate (72) has a groove. The turntable (74) is connected to the front side of the rotating shaft (52). The connecting rod (73) is slidably connected to the base (1). The extension shaft (77) is provided on the connecting rod (73). The extension shaft (77) is located in the groove. The bottom of the connecting rod (73) is connected to two connecting rods (76). The toggle rod (75) is connected to the eccentric position of the turntable (74). The toggle rod (75) is located between the two connecting rods (76).

2. An automated conveying device for microwave drying and heating of construction waste according to claim 1, characterized in that: It also includes a leveling mechanism, which includes a protective frame (81), a rotating wheel (82) and a belt drive assembly (83). The protective frame (81) is connected to the top of the base (1), and the rotating wheel (82) is rotatably connected to the protective frame (81). The rotating wheel (82) can flatten the slag on the belt conveyor (3) by rotating. A belt drive assembly (83) is provided between the rotating wheel (82) and the output shaft of the servo motor (4).

3. An automated conveying device for microwave drying and heating of construction waste according to claim 2, characterized in that: It also includes a sorting mechanism, which includes a magnet (91), a recycling frame (92) and a scraper (93). The magnet (91) is embedded in the rotating wheel (82) at even intervals along the circumference. The recycling frame (92) is connected to the protective frame (81). The scraper (93) is connected to the lower part of the recycling frame (92). The scraper (93) is attached to the rotating wheel (82) and the magnet (91).

4. An automated conveying device for microwave drying and heating of construction waste according to claim 1, characterized in that: It also includes a crushing mechanism, which includes a shovel plate (101), an electric drum (102), a sliding bar (103), a fixed plate (104), an elastic element one (105), a movable plate (106), a contact shaft (107), a guide plate (108), and an elastic element two (109). The electric drum (102) is installed at the middle position of the upper part of the base (1). Multiple shovel plates (101) are evenly spaced along the circumference of the electric drum (102). Multiple sliding bars (103) are evenly spaced along the electric drum (102). Multiple sets of fixed plates (104) are evenly arranged along the circumference of the electric drum (102). Each set of fixed plates (104) is provided with multiple plates. Multiple movable plates (106) are evenly connected on the sliding bar (103). The movable plates (106) and fixed plates (104) are staggered. An elastic element (105) is connected between the sliding bar (103) and the electric roller (102). A contact shaft (107) is slidably connected on the leftmost movable plate (106). An elastic element (109) is connected between the contact shaft (107) and the movable plate (106). Guide plates (108) are connected to the front and rear sides of the upper part of the base (1). The guide plates (108) are located at the movement trajectory of the contact shaft (107).

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