Dust overflow type unloading trolley

Abstract

The utility model relates to the technical field of unloading trolleys, in particular to a dust overflow type unloading trolley which comprises a rack, an unloading trolley body is arranged on the rack in a sliding mode, a dustproof belt is arranged on the unloading trolley body, a dustproof cover is arranged at the bottom of the unloading trolley body, and the dustproof belt bypasses the dustproof cover to cover a stock bin. A tensioning belt is arranged at one end of the dustproof belt, a connecting assembly is arranged between the tensioning belt and the machine frame and used for connecting the tensioning belt with the machine frame, a tensioning belt is fixedly arranged at the other end of the dustproof belt, a balancing weight is arranged at the end, away from the dustproof belt, of the tensioning belt, and a tensioning support is fixedly arranged on the machine frame. A tensioning carrier roller and a tensioning compression roller are wound on the tensioning support, the tensioning carrier roller is located above the tensioning compression roller, and the tensioning belt is wound on the tensioning carrier roller and the tensioning compression roller. The dustproof belt tensioning device has the effects that the dustproof belt is kept in a tensioning state, and dust overflowing is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of unloading trolleys, in particular to a dust-overflowing type unloading trolley. Background Art

[0002] In heavy industries such as steel, coal mining, and cement, the transportation and unloading of bulk materials usually rely on the key equipment of the unloading trolley. As an efficient material handling tool, the unloading trolley can effectively transport bulk materials from one location to another and perform precise unloading operations at designated locations.

[0003] In the related art, a Chinese patent with authorization announcement number CN216784650U provides a mobile material distribution belt conveyor, which includes a discharge vehicle frame, a plurality of rollers are arranged on the top of the discharge vehicle frame, and the rollers are covered with tapes. A tape roller is installed at the output end of the discharge vehicle frame, and the tape is wound on the tape roller. A discharge funnel is installed below the output end of the discharge vehicle frame, and dust-proof belt bearing rollers are arranged on both sides of the top of the discharge funnel, and dust-proof belt pressing rollers are arranged on both sides of the bottom of the discharge funnel. A dust-proof belt is wound around the dust-proof belt bearing roller and the dust-proof belt pressing roller, and the dust-proof belt bypasses the discharge funnel and covers the top of the silo. The two ends of the dust-proof belt are fixed at the two ends of the silo. When the discharge vehicle frame drives the discharge funnel to move, the dust-proof belt always bypasses the discharge funnel and covers the top of the silo. When discharging back and forth between different silos, dust spillage is reduced.

[0004] In the process of implementing this application, the inventors found that there are at least the following problems in this technology: during the long-term operation of the dustproof belt, the dustproof belt will gradually deform and stretch, causing the dustproof belt covering the top of the silo to be too loose, making it impossible for the dustproof belt to fit tightly against the silo opening to form an effective dust prevention barrier, resulting in dust overflow. Utility Model Content

[0005] In order to keep the dustproof belt in a tensioned state and reduce dust spillage, the present application provides a dust spillage type unloading trolley.

[0006] The dust discharge type unloading trolley provided in this application adopts the following technical solution:

[0007] A dust-overflowing unloading trolley comprises a frame, a unloading body is slidably arranged on the frame, a dustproof belt is arranged on the unloading body, a dustproof cover is arranged at the bottom of the unloading body, the dustproof belt bypasses the dustproof cover and covers the silo, a tensioning belt is arranged at one end of the dustproof belt, a connecting component is arranged between the tensioning belt and the frame, the connecting component is used to connect the tensioning belt to the frame, a tensioning belt is fixedly arranged at the other end of the dustproof belt, a counterweight is arranged at one end of the tensioning belt away from the dustproof belt, a tensioning bracket is fixedly arranged on the frame, a tensioning roller and a tensioning pressure roller are wound around the tensioning bracket, the tensioning roller is located above the tensioning pressure roller, and the tensioning belt is wound around the tensioning roller and the tensioning pressure roller.

[0008] By adopting the above technical scheme, one end of the dustproof belt is connected to the frame through the cooperation of the tensioning belt and the connecting component, and the other end of the dustproof belt is connected to the counterweight through the tensioning belt. When the dust cover follows the movement of the unloading vehicle, the dustproof belt always bypasses the dust cover and covers the silo, thereby achieving the effect of suppressing dust overflow. When the dustproof belt gradually deforms and elongates, the suspended counterweight uses the tension exerted by its own weight on the tensioning belt to move the tensioning belt, thereby the tensioning belt moves and stretches the dustproof belt, so that the dustproof belt always remains in a tensioned state, and then the dustproof belt fits the silo opening to form an effective dust prevention barrier, thereby achieving the effect of reducing dust overflow.

[0009] Preferably, the bottom of the tensioning roller abuts against the top of the tensioning belt, the side of the tensioning roller away from the tensioning belt abuts against the tensioning belt, the top of the tensioning roller abuts against the bottom of the tensioning belt, and the side of the tensioning roller close to the tensioning belt abuts against the tensioning belt.

[0010] By adopting the above technical solution, the tensioning roller fits one end of the tensioning belt connected to the dustproof belt toward the silo, and the tensioning roller supports the tensioning belt so that the counterweight block at the other end of the tensioning belt is suspended in the air.

[0011] Preferably, a tensioning guide roller is rotatably arranged on the tensioning bracket, the tensioning belt is wound around the tensioning guide roller, the top of the tensioning guide roller abuts against the bottom of the tensioning belt, and the tensioning guide roller abuts against the tensioning belt on the side away from the tensioning belt.

[0012] By adopting the above technical solution, the tensioning guide roller makes the counterweight on the tensioning belt stay away from the tensioning belt between the tensioning roller and the tensioning pressure roller, thereby reducing the situation where the counterweight scratches the tensioning belt.

[0013] Preferably, the connecting assembly includes a connecting seat, a connecting rod and a connecting head, the connecting seat is fixedly arranged on the frame, the connecting rod passes through the connecting seat, one end of the connecting rod is fixedly connected to the end of the tensioning belt away from the dustproof belt, the other end of the connecting rod is connected to the connecting head, and the connecting head is used to abut against the side of the connecting seat away from the tensioning belt.

[0014] By adopting the above technical solution, the connecting rod is restricted to the connecting seat through the tensioning belt and the connecting head, and the connecting seat is fixedly installed on the machine base, thereby achieving the effect of connecting the tensioning belt with the frame.

[0015] Preferably, an abutment spring is sleeved on the connecting rod, one end of the abutment spring abuts against a side of the connecting seat away from the tensioning belt, and the other end of the abutment spring abuts against a side of the connecting head close to the tensioning belt.

[0016] By adopting the above technical solution, the abutting spring abuts between the connecting seat and the connecting head to buffer the relative force between the connecting seat and the connecting head.

[0017] Preferably, the unloading vehicle body comprises a frame, a unloading straight pipe, a material distribution inclined pipe and a unloading chute, the frame is slidably arranged on the frame, the unloading straight pipe, the material distribution inclined pipe and the unloading chute are all fixedly arranged on the frame, the top end of the material distribution inclined pipe is communicated with the bottom end of the unloading straight pipe, the bottom end of the material distribution inclined pipe is communicated with the top end of the unloading chute, the bottom end of the unloading chute is communicated with the top end of the dust cover, lower pressure rollers are arranged on both sides of the unloading chute, the lower pressure roller is rotatably connected to the dust cover, an upper roller is arranged above the material distribution inclined pipe, the upper roller is rotatably connected to the frame, the dustproof belt is jointly wound around the upper roller and the lower pressure roller, the bottom of the dustproof belt abuts against the top of the upper roller, the top of the dustproof belt abuts against the bottom of the lower pressure roller, the opposite surfaces of the lower pressure roller abut against the dustproof belt, and the dustproof belt bypasses the unloading chute and covers above the silo.

[0018] By adopting the above technical scheme, the material enters the distribution inclined pipe from the unloading straight pipe, and the material in the distribution inclined pipe falls into the silo through the unloading chute. In the process of the frame driving the unloading straight pipe, the distribution inclined pipe and the unloading chute to move, the dust-proof belt always bypasses the unloading chute through the upper roller, and the dust-proof belt always covers the top of the silo through the lower pressure roller, and the dust cover is always provided between the unloading chute and the silo, thereby reducing the dust overflow.

[0019] Preferably, the unloading vehicle body also includes a loading guide roller, a plurality of loading rollers, a loading belt and a loading cover shell. The loading cover shell is fixedly arranged on the top of the unloading straight pipe. A loading port is opened on one side of the loading cover shell. The loading guide roller is rotatably arranged in the loading port. The loading roller is rotatably arranged on the frame. The loading belt is jointly wound around the loading guide roller and the loading roller.

[0020] By adopting the above technical solution, the feeding guide roller rotates to drive the feeding belt, and the feeding roller supports the feeding belt, so that the material on the feeding belt enters the unloading straight pipe from the feeding port on one side of the feeding cover shell.

[0021] Preferably, a plurality of wheels are rotatably arranged on the frame, a guide rail is fixedly arranged on the frame, and the wheels are rollingly arranged in the guide rail.

[0022] By adopting the above technical solution, the wheels on the frame roll along the guide rails, thereby achieving the effect of the frame sliding on the rack.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. By setting up the frame, unloading vehicle body, dustproof belt, dust cover, tensioning belt, connecting assembly, tensioning belt, counterweight, tensioning bracket, tensioning roller and tensioning roller, the dustproof belt is always kept in a tensioned state, so that the dustproof belt fits the material bin opening to form an effective dust-proof barrier, thereby achieving the effect of reducing dust spillage;

[0025] 2. By setting the tensioning guide roller, the situation where the counterweight block scratches the tensioning belt is reduced;

[0026] 3. By setting up a frame, a straight unloading pipe, an inclined material distribution pipe, a unloading chute, a lower pressure roller and an upper supporting roller, the dust overflow can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of a dust-filled unloading trolley in an embodiment of the present application.

[0028] Figure 2 It is a schematic diagram showing the connection relationship between the tensioning bracket and the tensioning belt in the embodiment of the present application.

[0029] Figure 3 It is a schematic diagram showing the connection relationship between the connecting seat and the tensioning belt in the embodiment of the present application.

[0030] Figure 4 It is a schematic diagram showing the positional relationship between the upper support roller and the lower pressure roller in the embodiment of the present application.

[0031] Figure 5 It is a schematic diagram showing the connection relationship between the discharge straight pipe and the discharge chute in the embodiment of the present application.

[0032] Explanation of the reference numerals in the accompanying drawings: 1. Frame; 2. Unloading vehicle body; 21. Frame; 22. Unloading straight pipe; 23. Material distribution inclined pipe; 24. Unloading chute; 25. Loading guide roller; 26. Loading roller; 27. Loading belt; 28. Loading cover shell; 281. Loading port; 3. Dust-proof belt; 31. Upper roller; 32. Lower pressure roller; 33. Dust cover; 4. Tensioning belt; 5. Connecting assembly; 51. Connecting seat; 52. Connecting rod; 53. Connecting head; 54. Abutting spring; 6. Tensioning belt; 61. Tensioning bracket; 62. Tensioning roller; 63. Tensioning pressure roller; 64. Tensioning guide roller; 7. Counterweight; 8. Guide rail; 81. Wheel; 9. Silo. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-5 This application is described in further detail.

[0034] The present application embodiment discloses a dust-filled unloading trolley. Figures 1 to 3 , including a frame 1, a discharge vehicle body 2 is arranged above the frame 1, the discharge vehicle body 2 slides back and forth along the length direction of the frame 1, and the discharge vehicle body 2 is located above the silo 9. A dustproof belt 3 is installed on the discharge vehicle body 2, a dustproof cover 33 is installed at the bottom of the discharge vehicle body 2, and the dustproof belt 3 bypasses the dustproof cover 33 and covers the silo 9. A tensioning belt 4 is installed at one end of the dustproof belt 3, and a connecting component 5 is installed between the tensioning belt 4 and the frame 1, and the connecting component 5 is used to connect the tensioning belt 4 to the frame 1. A tensioning belt 6 is installed at the other end of the dustproof belt 3, and a counterweight 7 is hung at one end of the tensioning belt 6 away from the dustproof belt 3. A tensioning bracket 61 is installed on the frame 1, and a tensioning roller 62 and a tensioning pressure roller 63 are wound around the tensioning bracket 61. The tensioning roller 62 is located above the tensioning pressure roller 63, and the tensioning belt 6 is wound around the tensioning roller 62 and the tensioning pressure roller 63. One end of the dustproof belt 3 is connected to the frame 1 through the cooperation of the tensioning belt 4 and the connecting assembly 5, and the other end of the dustproof belt 3 is connected to the counterweight 7 through the tensioning belt 6. When the dustproof cover 33 moves with the unloading vehicle 2, the dustproof belt 3 always bypasses the dustproof cover 33 and covers the silo 9, thereby achieving the effect of suppressing dust spillage. When the dustproof belt 3 gradually deforms and stretches, the suspended counterweight 7 uses the tension exerted by its own weight on the tensioning belt 6 to move the tensioning belt 6, so that the tensioning belt 6 moves and stretches the dustproof belt 3, so that the dustproof belt 3 always remains in a tensioned state. In this way, the dustproof belt 3 fits the opening of the silo 9 to form an effective dust-proof barrier, thereby achieving the effect of reducing dust spillage.

[0035] Reference Figure 1 and Figure 2A tensioning guide roller 64 is rotatably arranged on the tensioning bracket 61. The tensioning guide roller 64 is arranged in parallel with the tensioning roller 62, and the tensioning guide roller 64 and the tensioning roller 62 are located at the same height. The tensioning roller 63 is arranged in parallel with the tensioning roller 62, and the tensioning roller 63 is located directly below the tensioning roller 62. The tensioning belt 6 is connected to the dustproof belt 3 after being wound around the tensioning roller 63 by the tensioning roller 62, and the tensioning belt 6 is connected to the counterweight 7 after being wound around the tensioning guide roller 64 by the tensioning roller 62. The bottom of the tensioning roller 63 abuts against the top of the tensioning belt 6, and the side of the tensioning roller 63 away from the tensioning belt 4 abuts against the tensioning belt 6. The top of the tensioning roller 62 abuts against the bottom of the tensioning belt 6, and the side of the tensioning roller 62 close to the tensioning belt 4 abuts against the tensioning belt 6. The top of the tensioning guide roller 64 abuts against the bottom of the tensioning belt 6, and the side of the tensioning guide roller 64 away from the tensioning belt 4 abuts against the tensioning belt 6. The tensioning pressure roller 63 fits the end of the tensioning belt 6 connected to the dustproof belt 3 to the silo 9, and the tensioning roller 62 and the tensioning guide roller 64 support the tensioning belt 6, so that the counterweight 7 at the other end of the tensioning belt 6 is suspended. At the same time, the tensioning roller 62 and the tensioning guide roller 64 keep the counterweight 7 away from the tensioning belt 6 between the tensioning roller 62 and the tensioning pressure roller 63, reducing the situation where the counterweight 7 scratches the tensioning belt 6.

[0036] In order to connect the tensioning belt 4 to the frame 1, refer to Figure 1 and Figure 3 , the connecting assembly 5 includes a connecting seat 51, a connecting rod 52 and a connecting head 53. The connecting seat 51 is welded on the frame 1, and the connecting rod 52 passes through the connecting seat 51. One end of the connecting rod 52 is hooked to the end of the tensioning belt 4 away from the dustproof belt 3, and the other end of the connecting rod 52 is welded to the connecting head 53. An abutting spring 54 is sleeved on the connecting rod 52, one end of the abutting spring 54 abuts against the side of the connecting seat 51 away from the tensioning belt 4, and the other end of the abutting spring 54 abuts against the side of the connecting head 53 close to the tensioning belt 4. The connecting rod 52 is restricted to the connecting seat 51 by the tensioning belt 4 and the connecting head 53, and the connecting seat 51 is fixedly installed on the machine base, so as to achieve the effect of connecting the tensioning belt 4 with the frame 1. The abutting spring 54 abuts between the connecting seat 51 and the connecting head 53 to buffer the relative force between the connecting seat 51 and the connecting head 53.

[0037] In order to achieve the effect of unloading the unloading vehicle 2 to the silo 9, refer to Figures 1 to 5The unloading vehicle body 2 includes a vehicle frame 21, a unloading straight pipe 22, a material distribution inclined pipe 23, a unloading chute 24, a feeding guide roller 25, a plurality of feeding rollers 26, a feeding belt 27 and a feeding cover shell 28. A plurality of wheels 81 are rotatably arranged on the vehicle frame 21, a guide rail 8 is installed on the frame 1 along the length direction, and the wheels 81 are rotatably arranged in the guide rail 8. The unloading straight pipe 22, the material distribution inclined pipe 23 and the unloading chute 24 are all welded to the vehicle frame 21, the top end of the material distribution inclined pipe 23 is connected to the bottom end of the unloading straight pipe 22, the material distribution inclined pipe 23 is inclined, and the bottom end of the material distribution inclined pipe 23 is connected to the top end of the unloading chute 24. The feeding cover shell 28 is installed on the top of the unloading straight pipe 22, and a feeding port 281 is opened on one side of the feeding cover shell 28. The feeding guide roller 25 is rotatably arranged in the feeding port 281, the feeding roller 26 is rotatably arranged on the vehicle frame 21, and the feeding belt 27 is wound around the feeding guide roller 25 and the feeding roller 26. The feeding guide roller 25 rotates to drive the feeding belt 27, and the feeding roller 26 supports the feeding belt 27, so that the material on the feeding belt 27 enters the discharge straight pipe 22 from the feeding port 281 on one side of the feeding cover 28. The material enters the material distribution inclined pipe 23 from the discharge straight pipe 22, and the material in the material distribution inclined pipe 23 falls into the silo 9 through the discharge chute 24. The wheels 81 on the vehicle frame 21 roll along the guide rail 8, so that the vehicle frame 21 drives the discharge straight pipe 22, the material distribution inclined pipe 23, the discharge chute 24, the feeding guide roller 25, a plurality of feeding rollers 26, the feeding belt 27 and the feeding cover 28 to reciprocate above the silo 9, so that the material is discharged to different positions.

[0038] In order to reduce the possibility of dust spillage, refer to Figure 4 and Figure 5 The discharge chute 24 and the dust cover 33 are welded to each other, and the bottom end of the discharge chute 24 is connected to the top end of the dust cover 33. Lower pressure rollers 32 are installed on both sides of the discharge chute 24, and the lower pressure rollers 32 are rotatably connected to the dust cover 33. An upper roller 31 is installed above the material distribution inclined pipe 23, and the upper roller 31 is rotatably connected to the frame 21. The dustproof belt 3 is wound around the upper roller 31 and the lower pressure roller 32 together, the bottom of the dustproof belt 3 abuts against the top of the upper roller 31, the top of the dustproof belt 3 abuts against the bottom of the lower pressure roller 32, and the opposite surfaces of the lower pressure roller 32 abut against the dustproof belt 3, and the dustproof belt 3 bypasses the discharge chute 24 and covers the top of the silo 9. During the unloading process of the unloading chute 24, the dustproof belt 3 always bypasses the unloading chute 24 through the upper roller 31, and the dustproof belt 3 always covers the top of the silo 9 through the lower pressure roller 32. The dust cover 33 is always arranged between the unloading chute 24 and the silo 9, so as to reduce the dust overflow.

[0039] The implementation principle of a dust-overflowing type unloading trolley in the embodiment of the present application is as follows: the material on the loading belt 27 enters the unloading straight pipe 22 from the loading port 281 on one side of the loading cover shell 28, and the material in the unloading straight pipe 22 is diverted into the unloading chute 24 through the material dividing inclined pipe 23, and the material in the unloading chute 24 falls into the silo 9. The unloading vehicle body 2 moves back and forth above the silo 9, so that the material is unloaded to different positions. During the unloading process of the unloading chute 24, the dust-proof belt 3 always bypasses the unloading chute 24 through the upper roller 31, and the dust-proof belt 3 always covers the top of the silo 9 through the lower pressure roller 32, and the dust cover 33 is always set between the unloading chute 24 and the silo 9, so as to reduce the dust overflow. When the dustproof belt 3 gradually deforms and stretches, the suspended counterweight block 7 uses its own weight to apply tension to the tension belt 6, so that the tension belt 6 moves and stretches the dustproof belt 3, so that the dustproof belt 3 always remains in a tensioned state. In addition, the dustproof belt 3 fits the opening of the silo 9 to form an effective dust-proof barrier, thereby reducing the dust spillage.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A dust-free unloading trolley, comprising a frame (1), a unloading trolley body (2) slidably arranged on the frame (1), a dust-proof belt (3) arranged on the unloading trolley body (2), characterized in that: A dust cover (33) is arranged at the bottom of the unloading vehicle body (2); the dust cover belt (3) bypasses the dust cover (33) and covers the silo (9); a tensioning belt (4) is arranged at one end of the dust cover belt (3); a connecting component (5) is arranged between the tensioning belt (4) and the frame (1); the connecting component (5) is used to connect the tensioning belt (4) with the frame (1); a tensioning belt (6) is fixedly arranged at the other end of the dust cover belt (3); a counterweight (7) is arranged at one end of the tensioning belt (6) away from the dust cover belt (3); a tensioning bracket (61) is fixedly arranged on the frame (1); a tensioning roller (62) and a tensioning pressure roller (63) are wound around the tensioning bracket (61); the tensioning roller (62) is located above the tensioning pressure roller (63); and the tensioning belt (6) is wound around the tensioning roller (62) and the tensioning pressure roller (63).

2. A dust-free unloading trolley according to claim 1, characterized in that: The bottom of the tensioning roller (63) abuts against the top of the tensioning belt (6), the side of the tensioning roller (63) away from the tensioning belt (4) abuts against the tensioning belt (6), the top of the tensioning roller (62) abuts against the bottom of the tensioning belt (6), and the side of the tensioning roller (62) close to the tensioning belt (4) abuts against the tensioning belt (6).

3. A dust-free unloading trolley according to claim 2, characterized in that: A tensioning guide roller (64) is rotatably arranged on the tensioning bracket (61), the tensioning belt (6) is wound around the tensioning guide roller (64), the top of the tensioning guide roller (64) abuts against the bottom of the tensioning belt (6), and the tensioning guide roller (64) abuts against the tensioning belt (6) on the side away from the tensioning belt (4).

4. A dust-free unloading trolley according to claim 1, characterized in that: The connecting assembly (5) comprises a connecting seat (51), a connecting rod (52) and a connecting head (53); the connecting seat (51) is fixedly arranged on the frame (1); the connecting rod (52) passes through the connecting seat (51); one end of the connecting rod (52) is fixedly connected to an end of the tensioning belt (4) away from the dustproof belt (3); the other end of the connecting rod (52) is connected to the connecting head (53); and the connecting head (53) is used to abut against the side of the connecting seat (51) away from the tensioning belt (4).

5. A dust-free unloading trolley according to claim 4, characterized in that: The connecting rod (52) is sleeved with a contact spring (54), one end of which contacts the connecting seat (51) away from the tensioning belt (4), and the other end of which contacts the connecting head (53) close to the tensioning belt (4).

6. The dust-free unloading trolley according to claim 1, characterized in that: The unloading vehicle body (2) comprises a vehicle frame (21), a unloading straight pipe (22), a material distribution inclined pipe (23) and a unloading chute (24); the vehicle frame (21) is slidably arranged on the frame (1); the unloading straight pipe (22), the material distribution inclined pipe (23) and the unloading chute (24) are all fixedly arranged on the vehicle frame (21); the top end of the material distribution inclined pipe (23) is communicated with the bottom end of the unloading straight pipe (22); the bottom end of the material distribution inclined pipe (23) is communicated with the top end of the unloading chute (24); the bottom end of the unloading chute (24) is communicated with the top end of the dust cover (33); and both sides of the unloading chute (24) are provided with A lower pressure roller (32), the lower pressure roller (32) is rotatably connected to the dust cover (33), an upper roller (31) is arranged above the material distribution inclined pipe (23), the upper roller (31) is rotatably connected to the frame (21), the dust belt (3) is wound around the upper roller (31) and the lower pressure roller (32), the bottom of the dust belt (3) is in contact with the top of the upper roller (31), the top of the dust belt (3) is in contact with the bottom of the lower pressure roller (32), the opposite surfaces of the lower pressure roller (32) are in contact with the dust belt (3), and the dust belt (3) bypasses the discharge chute (24) and covers the top of the silo (9).

7. A dust-free unloading trolley according to claim 6, characterized in that: The unloading vehicle body (2) further comprises a loading guide roller (25), a plurality of loading idler rollers (26), a loading belt (27) and a loading cover shell (28); the loading cover shell (28) is fixedly arranged on the top of the unloading straight pipe (22); a loading port (281) is provided on one side of the loading cover shell (28); the loading guide roller (25) is rotatably arranged in the loading port (281); the loading idler roller (26) is rotatably arranged on the vehicle frame (21); and the loading belt (27) is wound around the loading guide roller (25) and the loading idler roller (26).

8. The dust-free unloading trolley according to claim 6, characterized in that: A plurality of wheels (81) are rotatably arranged on the vehicle frame (21), a guide rail (8) is fixedly arranged on the frame (1), and the wheels (81) are rollingly arranged in the guide rail (8).

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