Petroleum coke unloading vehicle bottom material cleaning mechanism and method

Abstract

The petroleum coke unloading vehicle bottom material cleaning mechanism comprises a main cross beam, beam end joint structures are arranged at the left end and the right end of the main cross beam respectively, an electric beam upper moving structure is arranged on the main cross beam, a rotational symmetric arm structure is arranged on the electric beam upper moving structure, and the center of the rotational symmetric arm structure is arranged on the electric beam upper moving structure. A vertical rotation driving structure is arranged at the end, away from the electric beam upper moving structure, of the rotational symmetric arm structure and can swing with the joint of the rotational symmetric arm structure and the electric beam upper moving structure as the center under the action of the rotational symmetric arm structure. The lower end of the vertical rotation driving structure is provided with a cleaning disc used for cleaning powder materials accumulated at the bottom of the car hopper box body. The working intensity of unloading workers can be effectively reduced, the personal safety and health of the unloading workers are improved, the electric cleaning structure is arranged on the car hopper box body in a hoisting mode, and compared with manual cleaning, the cleaning efficiency is high, and the cleaning effect is good.

Description

Technical Field

[0001] The invention belongs to the technical field of petroleum coke unloading and material cleaning, and in particular relates to a petroleum coke unloading and material cleaning mechanism and method. Background Art

[0002] During the unloading process of petroleum coke, petroleum coke residue is easily generated under the vehicle. This is because the petroleum coke particles are small and fragile. When unloading, some particles are easy to adhere to the bottom of the vehicle or corners, making it difficult to complete the unloading. Petroleum coke is a product made by separating light and heavy oils through distillation of crude oil, and then converting heavy oil through thermal cracking. Petroleum coke itself is not a highly toxic substance, but some harmful substances may be produced during the processing and storage process. At present, when unloading and cleaning the bottom of the vehicle, multiple workers are required to work together, and sometimes even need to climb into the truck box, which poses certain personal safety risks. The more subtle danger is that workers may suffer health damage during contact with petroleum coke, which poses an occupational safety risk. Therefore, workers are required to wear protective equipment. However, since they are prone to sweating during work, many workers are not very enthusiastic about wearing protective equipment or wear them improperly. Based on this situation, a petroleum coke unloading vehicle bottom cleaning mechanism is specially designed. Summary of the invention

[0003] In order to overcome the technical problems described in the above background technology, the present invention provides a petroleum coke unloading bottom cleaning mechanism and method, which can effectively reduce the work intensity of unloading workers and improve the personal safety and health of unloading workers. An electric cleaning structure composed of a main cross beam, a beam end joint structure, a moving structure on an electric beam, a rotationally symmetrical arm structure, a vertical rotation drive structure and a cleaning disc is arranged on the truck box in a hoisting manner. Compared with manual cleaning, the cleaning efficiency is high and the cleaning effect is good.

[0004] The technical solution of the present invention is: a petroleum coke unloading bottom cleaning mechanism, comprising a main crossbeam, a beam end joint structure, an electric beam upper moving structure, a rotationally symmetrical arm structure, a vertical rotating drive structure and a cleaning plate, wherein the left and right ends of the main crossbeam are respectively provided with beam end joint structures for joining with the two upper end edges of the truck bucket body, and the main crossbeam can be lifted upward and separated from the truck bucket body by a mobile crane outside the truck bucket body through the beam end joint structure, and the main crossbeam is provided with an electric beam upper moving structure, and the electric beam upper moving structure is provided with a rotationally symmetrical arm structure, the center of the rotationally symmetrical arm structure is arranged on the electric beam upper moving structure and can move left and right along the main crossbeam with the electric beam upper moving structure, and the end of the rotationally symmetrical arm structure away from the electric beam upper moving structure is provided with a vertical rotating drive structure, and the vertical rotating drive structure can swing around the connection between the rotationally symmetrical arm structure and the electric beam upper moving structure as the center under the action of the rotationally symmetrical arm structure, and the lower end of the vertical rotating drive structure is provided with a cleaning plate for cleaning the powder material accumulated at the bottom of the truck bucket body.

[0005] Furthermore, the moving structure on the electric beam includes a transmission belt, a sliding drive motor, a sliding bearing block, a driving wheel, a driven wheel and an end connection block. End connection blocks are respectively provided at both ends of the main beam, and a driving wheel and a driven wheel are respectively provided in the two end connection blocks. A transmission belt is provided between the driving wheel and the driven wheel, and a sliding drive motor is provided on the end connection block where the driving wheel is located. The sliding bearing block is arranged on the main beam and is driven by the transmission belt to move left and right along the main beam.

[0006] Furthermore, the rotationally symmetrical arm structure includes a rotating arm, a central motor, an arched cover, a mounting block, a coupling, a stepped shaft, a rotating bearing block and a locking sleeve block. The rotating bearing block is arranged on a sliding bearing block of a moving structure on the electric beam. A stepped shaft is fixedly arranged at the center of the upper end of the rotating bearing block. The stepped shaft passes through the center of the rotating arm and the part extending out of the rotating arm is nested with a locking sleeve block. The first-step shaft section of the stepped shaft above the locking sleeve block is connected to the central motor above through a coupling. The central motor is installed on the arched cover through a mounting block. The arched cover is nested on the stepped shaft and installed on the rotating arm.

[0007] Furthermore, the vertical rotation drive structure includes a cleaning end motor and a transmission shaft. The cleaning end motor is arranged at the end of the rotating arm and the downward main shaft is connected to the transmission shaft under the rotating arm. The transmission shaft is connected to the cleaning disk and drives the cleaning disk to rotate under the drive of the cleaning end motor.

[0008] Furthermore, the vertical rotation drive structure includes a cleaning end motor, a transmission shaft and an elastic telescopic connection structure. The cleaning end motor is arranged at the end of the rotating arm and the downward main shaft is connected to the transmission shaft below the rotating arm. An elastic telescopic connection structure is provided below the transmission shaft. A cleaning disc is provided at the lower end of the elastic telescopic connection structure. The axes of the transmission shaft, the elastic telescopic connection structure and the cleaning disc are on the same vertical straight line. The cleaning end motor drives the transmission shaft, the elastic telescopic connection structure and the cleaning disc to rotate. The elastic telescopic connection structure plays an elastic buffering role in the contact between the cleaning disc and the bottom of the truck bucket box.

[0009] Furthermore, the elastic telescopic connection structure includes a sleeve, a compression spring, a lower connecting block and an embedded sliding rod. The sleeve is arranged at the lower end of the transmission shaft, and the lower end of the sleeve is embedded with the embedded sliding rod from bottom to top. The middle part of the embedded sliding rod is provided with a lower connecting block, and a compression spring is provided between the lower connecting block and the lower end of the sleeve. The part of the embedded sliding rod above the lower connecting block is a square structure and the sleeve corresponding to the sleeve hole that nests the embedded sliding rod is a square hole structure, so that the cleaning disc can elastically move upward to a distance of the maximum compression amount of the compression spring.

[0010] Furthermore, the beam end joint structure includes a bucket clip block, a reinforcement pad and a lifting ear. The bucket clip block is a block structure opening downward and is used to clip onto the upper side edge of the bucket body from top to bottom. Reinforcement pads are respectively provided on the left and right sides of the bucket clip block to increase the elasticity of the contact with the upper side edge of the bucket body. The upper end of the bucket clip block is provided with a lifting ear for connecting to a mobile crane outside the bucket body through a cable.

[0011] Furthermore, a controller is provided on the bucket buckle block where the sliding drive motor is located. The controller is electrically connected to the sliding drive motor, the central motor and the cleaning end motor respectively. The power supply line and control line of the controller respectively follow the cables at the lifting ears to reach the mobile crane outside the bucket box to obtain external power supply and control.

[0012] A method for cleaning the bottom of a petroleum coke unloading truck comprises the following steps: S1. When the petroleum coke truck is preliminarily unloaded, the front end of the truck bed is lifted to present an inclined unloading state with the front higher and the rear lower. The main crossbeam is hoisted above the truck bed by moving the crane and the cable. The two cleaning plates are respectively pressed against the bottom of the truck bed and the front cleaning plate is in contact with the front wall of the truck bed. The beam end joint structure is buckled to the upper ends of the left and right side walls of the truck bed from top to bottom. S2. The control cabinet hung on the mobile crane outside the truck box controls the two vertical rotating drive structures to start, and controls the mobile structure on the electric beam to drive the rotating symmetrical arm structure to move left and right along the main beam to achieve a sweeping action, and pushes the mobile crane outside the truck box to move from the front of the vehicle to the rear of the vehicle to achieve overall cleaning of the bottom of the truck box; S3. After the vertical rotation drive structure stops, if there is any residue in the truck box, control the mobile crane to pull the main cross beam upwards, so that the beam end joint structure is separated from the truck box, and push the mobile crane to reset to the front end of the truck box, then put the main cross beam back downwards, and the beam end joint structure is buckled to the upper end of the side wall of the truck box; S4, control the moving structure on the electric beam to drive the vertical rotating driving structure to move to the center of the main crossbeam, control the vertical rotating driving structure to move the two vertical rotating driving structures toward the left and right side walls of the bucket body respectively, start the vertical rotating driving structure, and the two 6 respectively clean the left and right sides of the bucket body, and at the same time push the mobile crane outside the bucket body from the front end of the bucket body to the rear end, so as to realize the overall secondary cleaning of the bottom of the bucket body; S5. Check the inside of the truck bed. If any residue is found inside the truck bed, repeat steps S3 and S4. If the truck bed is clean, stop the machine, control the mobile crane to lift the main beam upward until the cleaning plate is separated from the truck bed, and then control the rotationally symmetrical arm structure to move to one end of the main beam under the drive of the mobile structure on the electric beam. The mobile crane moves the entire petroleum coke unloading undercarriage cleaning mechanism away from the front of the truck. At this time, the cleaning plate is on one side of the truck to avoid contact with the truck.

[0013] Furthermore, the mobile crane includes a crane body, a mobile lifting beam, an electric-controlled lifting device, a control handle and a lockable universal wheel. The central upper end of the crane body is the mobile lifting beam, and the mobile lifting beam is provided with an electric-controlled lifting device. The mobile lifting beam is also provided with a control handle, and the bottom of the crane body is provided with a lockable universal wheel.

[0014] The present invention has the following beneficial effects due to the adoption of the above technology.

[0015] 1. The present invention can effectively reduce the work intensity of unloading workers and improve their personal safety and health. It mainly adopts a hoisting method to set up an electric cleaning structure on the truck box body, which is composed of a main cross beam, a beam end joint structure, a moving structure on an electric beam, a rotationally symmetrical arm structure, a vertical rotation drive structure and a cleaning disc. Different cleaning actions can be formed. Compared with manual cleaning, the cleaning efficiency is high and the cleaning effect is good.

[0016] 2. The present invention can control the cleaning end motors of the two vertical rotating drive structures to be powered on and turned on through a control cabinet hung on a mobile crane outside the truck body. At this time, the rotating arm on the rotationally symmetrical arm structure is perpendicular to the main beam, and the transmission belt on the mobile structure on the electric beam is controlled to drive the rotationally symmetrical arm structure to move left and right along the main beam to achieve a sweeping action. In this way, the two cleaning discs rotate and clean the front and rear sections of the truck body in turn, avoiding accumulation at the rear end of the truck body after cleaning the front and rear of the truck body. This is suitable for cleaning when a large amount of residual petroleum coke is accumulated in the truck body.

[0017] 3. The present invention can control the moving structure on the electric beam to drive the vertical rotation driving structure to move to the center of the main beam, control the central motor of the vertical rotation driving structure to be energized and rotate forward, and the two ends of the rotating arm swing relative to their own centers, so that the two vertical rotation driving structures are respectively leaned against the left and right side walls of the truck box. At this time, the two cleaning discs are respectively leaned against the left and right side walls of the truck box, and the vertical rotation driving structure is turned on. The two cleaning discs clean the left and right sides of the truck box respectively, and at the same time, the mobile crane is pushed from the front end of the truck box to the rear end outside the truck box to achieve overall secondary cleaning of the bottom of the truck box. At this time, since the two cleaning discs clean the left and right sides of the truck box respectively, the residual petroleum coke in the truck box can be cleaned more quickly, which is suitable for cleaning when there is less residual petroleum coke accumulated in the truck box. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention when in use.

[0019] Figure 2 It is a structural diagram of embodiment 1 of the present invention.

[0020] Figure 3 It is a top view of the first embodiment of the present invention.

[0021] Figure 4 It is a front view of the first embodiment of the present invention.

[0022] Figure 5 It is a left view of the first embodiment of the present invention.

[0023] Figure 6 yes Figure 5 A local enlarged schematic diagram of point A in the middle.

[0024] Figure 7 It is a structural diagram of embodiment 2 of the present invention.

[0025] Figure 8 It is a left view of the second embodiment of the present invention.

[0026] Fig. 9 It is a structural schematic diagram of the mobile crane used in the present invention.

[0027] In the figure: 1, truck box body, 2, rotating arm, 3, truck box buckle block, 4, main beam, 5, transmission shaft, 6, cleaning plate, 7, cleaning end motor, 8, reinforcing pad, 9, first lifting eye, 10, end connection block, 11, transmission belt, 12, arch cover, 13, center motor, 14, rotating bearing block, 15, sliding bearing block, 16, second lifting eye, 17, sliding drive motor, 18, mounting connection block, 19, coupling, 20, upper arm connection plate, 21, locking sleeve block, 22, lower shaft section, 23, upper shaft section, 24, sleeve, 25, compression spring, 26, lower connecting block, 27, embedded slide bar, 28, mobile lifting beam, 29, electric control spreader, 30, control handle, 31, lockable universal wheel. DETAILED DESCRIPTION

[0028] Embodiment 1: Figure 1-Figure 8 As shown, the present invention provides a petroleum coke unloading vehicle bottom cleaning mechanism, comprising a main cross beam 4, a beam end joint structure, an electric beam upper moving structure, a rotationally symmetrical arm structure, a vertical rotating drive structure and a cleaning plate 6, wherein the left and right ends of the main cross beam 4 are respectively provided with beam end joint structures for joining with the two upper end edges of the vehicle bucket body 1, and the main cross beam 4 can be lifted upwards and separated from the vehicle bucket body 1 by a mobile crane outside the vehicle bucket body 1 through the beam end joint structure, the main cross beam 4 is provided with an electric beam upper moving structure, the electric beam upper moving structure is provided with a rotationally symmetrical arm structure, the center of the rotationally symmetrical arm structure is arranged on the electric beam upper moving structure and can move left and right along the main cross beam 4 with the electric beam upper moving structure, the end of the rotationally symmetrical arm structure away from the electric beam upper moving structure is provided with a vertical rotating drive structure, the vertical rotating drive structure can swing around the connection between the rotationally symmetrical arm structure and the electric beam upper moving structure as the center under the action of the rotationally symmetrical arm structure, and the lower end of the vertical rotating drive structure is provided with a cleaning plate 6 for cleaning the powder material accumulated at the bottom of the vehicle bucket body 1.

[0029] like Figure 2-Figure 4 As shown, the moving structure on the electric beam includes a transmission belt 11, a sliding drive motor 17, a sliding bearing block 15, a driving wheel, a driven wheel and an end connection block 10. The two ends of the main beam 4 are respectively provided with end connection blocks 10, and the two end connection blocks 10 are respectively provided with a driving wheel and a driven wheel. A transmission belt 11 is provided between the driving wheel and the driven wheel. A sliding drive motor 17 is provided on the end connection block 10 where the driving wheel is located. The sliding bearing block 15 is arranged on the main beam 4 and is driven by the transmission belt 11 to move left and right along the main beam 4.

[0030] like Figure 6As shown, the rotationally symmetrical arm structure includes a rotating arm 2, a central motor 13, an arch cover 12, a mounting block 18, a coupling 19, a stepped shaft, a rotating bearing block 14 and a locking sleeve block 21. The rotating bearing block 14 is arranged on a sliding bearing block 15 of a moving structure on the electric beam. A stepped shaft is fixedly arranged at the center of the upper end of the rotating bearing block 14. The stepped shaft is divided into an upper shaft section 23 and a lower shaft section 22. The upper shaft section 23 is arranged at the upper end of the lower shaft section 22 and has an outer diameter smaller than the outer diameter of the lower shaft section 22. The stepped shaft runs through the rotating arm 2. The lower shaft section 22 extending from the center of the rotating arm 2 is threadedly embedded with a locking sleeve block 21, and the upper shaft section 23 of the stepped shaft above the locking sleeve block 21 is connected to the upper center motor 13 through a coupling 19. The center motor 13 is installed on the arch cover 12 through the mounting block 18. The arch cover 12 is nested on the stepped shaft and installed on the arm upper receiving plates 20 on the left and right sides of the rotating arm 2, thereby realizing the fixation of the main shaft of the center motor 13. The body of the center motor 13 drives the rotating arm 2 to rotate relative to the rotating bearing block 14.

[0031] like Figure 5 As shown, the vertical rotation drive structure includes a cleaning end motor 7 and a transmission shaft 5. The cleaning end motor 7 is arranged at the end of the rotating arm 2 and the downward main shaft is connected to the transmission shaft 5 located below the rotating arm 2. The transmission shaft 5 is connected to the cleaning disc 6 and drives the cleaning disc 6 to rotate under the drive of the cleaning end motor 7.

[0032] like Figure 7 and Figure 8 As shown, the vertical rotation driving structure includes a cleaning end motor 7, a transmission shaft 5 and an elastic telescopic connection structure. The cleaning end motor 7 is arranged at the end of the rotating arm 2 and the downward main shaft is connected to the transmission shaft 5 located below the rotating arm 2. An elastic telescopic connection structure is provided below the transmission shaft 5. A cleaning disc 6 is provided at the lower end of the elastic telescopic connection structure. The axes of the transmission shaft 5, the elastic telescopic connection structure and the cleaning disc 6 are on the same vertical straight line. The cleaning end motor 7 drives the transmission shaft 5, the elastic telescopic connection structure and the cleaning disc 6 to rotate. The elastic telescopic connection structure plays an elastic buffering role in the contact between the cleaning disc 6 and the bottom of the truck bucket box 1.

[0033] like Figure 7 and Figure 8 As shown, the elastic telescopic connection structure includes a sleeve 24, a compression spring 25, a lower connecting block 26 and an embedded slide bar 27. The sleeve 24 is arranged at the lower end of the transmission shaft 5, and the lower end of the sleeve 24 is embedded with the embedded slide bar 27 from bottom to top. The middle part of the embedded slide bar 27 is provided with a lower connecting block 26, and a compression spring 25 is provided between the lower connecting block 26 and the lower end of the sleeve 24. The part of the embedded slide bar 27 above the lower connecting block 26 is a square structure and the sleeve 24 corresponding to the sleeve hole that nests the embedded slide bar 27 is a square hole structure, so that the cleaning disc 6 can elastically move upward to a distance of the maximum compression amount of the compression spring 25.

[0034] like Figure 2 As shown, the beam end joint structure includes a bucket clip block 3, a reinforcement pad block 8, a first lifting ear 9 and a second lifting ear 16. The bucket clip block 3 is a block structure with an opening facing downward and is used to clip onto the upper side edge of the bucket box 1 from top to bottom. The left and right sides of the bucket clip block 3 are respectively provided with reinforcement pads 8 for increasing the elasticity of contact with the upper side edge of the bucket box 1. The upper ends of the two bucket clip blocks 3 are respectively provided with a first lifting ear 9 and a second lifting ear 16 for connecting to a mobile crane outside the bucket box 1 through cables.

[0035] The core of the control system of the above structure is mainly the controller arranged on the bucket buckle block 3 where the sliding drive motor 17 is located. The controller is electrically connected to the sliding drive motor 17, the central motor 13 and the cleaning end motor 7 respectively. The power supply line and control line of the controller are respectively connected along the cables at the lifting ears to the mobile crane outside the bucket body 1 to obtain external power supply and control.

[0036] Among them, it should be noted that the length of the main crossbeam 4 is set to be equal to the width inside the truck bed box 1, and the length of the rotating arm 2 is slightly larger than the length of the main crossbeam 4, for example, 5-20 cm longer than the main crossbeam 4, so that when the center of the rotating arm 2 coincides with the center of the main crossbeam 4, the two ends of the rotating arm 2 are respectively close to the left and right side walls of the truck bed box 1, thereby realizing staggered cleaning of the left and right sides of the truck bed box 1.

[0037] A method for cleaning the bottom of a petroleum coke unloading truck comprises the following steps: S1, wait until the petroleum coke truck has preliminarily completed unloading, the front end of the truck bed 1 is lifted to present an inclined unloading state with the front high and the rear low, two workers push the mobile crane from the front part to the top of the truck bed 1, one on the left and one on the right, respectively, so that the main crossbeam 4 is hoisted to the top of the truck bed 1 of the petroleum coke truck by the mobile crane and the cable, and then the mobile crane is controlled to lower the lifting height, the two cleaning plates 6 are respectively pressed against the bottom of the truck bed 1 and the cleaning plate 6 in the front contacts the front wall of the truck bed 1, and the truck bed buckle block 3 of the beam end joint structure is buckled to the upper ends of the left and right side walls of the truck bed 1 from top to bottom; S2. The cleaning end motors 7 of the two vertical rotating drive structures are powered on by the control cabinet hung on the mobile crane outside the truck box 1. At this time, the rotating arm 2 on the rotating symmetrical arm structure is perpendicular to the main beam 4, and the transmission belt 11 on the moving structure on the electric beam is controlled to drive the rotating symmetrical arm structure to move left and right along the main beam 4 to realize the sweeping action. The sweeping movement rate The speed is 0.1m / s, and the mobile crane is pushed from the front of the vehicle to the rear of the vehicle outside the truck box 1. The time interval between two consecutive manual pushes of the mobile crane is , ,in is the width of the truck box 1, is the sweeping movement speed, that is, the movement speed of the sliding bearing block 15 driven by the sliding drive motor 17; S3. After the bottom of the bucket body 1 is completely cleaned, the cleaning end motor 7 of the vertical rotating drive structure is powered off and stopped. If residual petroleum coke is found in the bucket body 1, the worker controls the mobile crane to pull the main cross beam 4 upward, so that the bucket buckle block 3 of the beam end joint structure is separated from the bucket body 1, and pushes the mobile crane to reset to the front end of the bucket body 1, and then puts the main cross beam 4 back downward, and the bucket buckle block 3 of the beam end joint structure is buckled to the upper end of the side wall of the bucket body 1; S4, control the moving structure on the electric beam to drive the vertical rotation driving structure to move to the center of the main crossbeam 4, control the central motor 13 of the vertical rotation driving structure to be energized and rotate forward, and the two ends of the rotating arm 2 swing relative to their own center, and the two vertical rotation driving structures are respectively leaned against the left and right side walls of the bucket body 1. At this time, the two cleaning discs 6 are respectively leaned against the left and right side walls of the bucket body 1, and the vertical rotation driving structure is turned on. The two cleaning discs 6 clean the left and right sides of the bucket body 1 respectively, and at the same time, the mobile crane is pushed outside the bucket body 1 from the front end of the bucket body 1 to the rear end, so as to realize the overall secondary cleaning of the bottom of the bucket body 1; S5. Check the inside of the truck box 1. If any residue is found in the truck box 1, repeat steps S3 and S4. If the truck box 1 is clean, stop the machine and control the mobile crane to pull the main beam 4 upward until the cleaning plate 6 is upwardly separated from the truck box 1. Then control the rotationally symmetrical arm structure to move to one end of the main beam 4 under the drive of the mobile structure on the electric beam. The mobile crane moves the entire petroleum coke unloading underbody cleaning mechanism away from the front of the truck. At this time, the cleaning plate 6 is on one side of the truck to avoid contact with the truck.

[0038] like Fig. 9 As shown, the mobile crane includes a crane body, a control cabinet, a mobile hanging beam 28, an electric-controlled hanging device 29, a control handle 30 and a lockable universal wheel 31. The control cabinet is hung on the crane body by a detachable lock buckle. The central upper end of the crane body is the mobile hanging beam 28. The mobile hanging beam 28 is provided with an electric-controlled hanging device 29. The mobile hanging beam 28 is also provided with a control handle 30. The bottom of the crane body is provided with a lockable universal wheel 31.

[0039] Embodiment 2: Based on embodiment 1, the lockable universal wheel 31 at the bottom of the mobile crane is replaced with a mobile electric body base to realize the electric movement of the mobile crane, which helps to improve the operating efficiency.

[0040] Embodiment 3: Based on embodiment 1 or embodiment 2, in order to facilitate subsequent observation, a control screen is set on the control cabinet of the mobile crane, and a camera is set in the center of the mobile crane to facilitate observation of the truck cleaning situation and further improve operational efficiency.

Claims

1. A petroleum coke unloading vehicle bottom cleaning mechanism, characterized in that: The invention comprises a main cross beam (4), a beam end joint structure, an electric beam upper movable structure, a rotationally symmetrical arm structure, a vertically rotating drive structure and a cleaning disc (6), wherein the left and right ends of the main cross beam (4) are respectively provided with the beam end joint structure for engaging with the two upper end edges of the truck bucket box (1), and the main cross beam (4) can be lifted upwards and separated from the truck bucket box (1) by a mobile crane outside the truck bucket box (1) through the beam end joint structure, the main cross beam (4) is provided with the electric beam upper movable structure, the electric beam upper movable structure is provided with the rotationally symmetrical arm structure, and the rotationally symmetrical arm structure is provided on the electric beam upper movable structure. The center of the dynamic symmetrical arm structure is arranged on the moving structure on the electric beam and can move left and right along the main crossbeam (4) along with the moving structure on the electric beam. The end of the rotationally symmetrical arm structure away from the moving structure on the electric beam is provided with the vertical rotation drive structure. The vertical rotation drive structure can swing around the connection between the rotationally symmetrical arm structure and the moving structure on the electric beam under the action of the rotationally symmetrical arm structure. The lower end of the vertical rotation drive structure is provided with the cleaning disc (6) for cleaning the powder material accumulated at the bottom of the truck box (1).

2. A petroleum coke unloading vehicle bottom cleaning mechanism according to claim 1, characterized in that: The moving structure on the electric beam comprises a transmission belt (11), a sliding drive motor (17), a sliding bearing block (15), a driving wheel, a driven wheel and an end connection block (10); the end connection blocks (10) are respectively provided at both ends of the main crossbeam (4); the driving wheel and the driven wheel are respectively provided in the two end connection blocks (10); the transmission belt (11) is provided between the driving wheel and the driven wheel; the sliding drive motor (17) is provided on the end connection block (10) where the driving wheel is located; the sliding bearing block (15) is provided on the main crossbeam (4) and is driven by the transmission belt (11) to move left and right along the main crossbeam (4).

3. A petroleum coke unloading vehicle bottom cleaning mechanism according to claim 2, characterized in that: The rotationally symmetrical arm structure comprises a rotating arm (2), a central motor (13), an arch cover (12), a mounting block (18), a coupling (19), a stepped shaft, a rotating bearing block (14) and a locking sleeve block (21); the rotating bearing block (14) is arranged on the sliding bearing block (15) of the movable structure on the electric beam; the stepped shaft is fixedly arranged at the center of the upper end of the rotating bearing block (14); the stepped shaft passes through the center of the rotating arm (2) and the locking sleeve block (21) is embedded in the portion of the stepped shaft extending out of the rotating arm (2); a first-step shaft section of the stepped shaft located above the locking sleeve block (21) is connected to the central motor (13) above through the coupling (19); the central motor (13) is mounted on the arch cover (12) through the mounting block (18); the arch cover (12) is embedded in the stepped shaft and mounted on the rotating arm (2).

4. A petroleum coke unloading vehicle bottom cleaning mechanism according to claim 3, characterized in that: The vertical rotation drive structure comprises a cleaning end motor (7) and a transmission shaft (5); the cleaning end motor (7) is arranged at the end of the rotating arm (2) and a main shaft facing downward is connected to the transmission shaft (5) located below the rotating arm (2); the transmission shaft (5) is connected to the cleaning disc (6) and drives the cleaning disc (6) to rotate under the drive of the cleaning end motor (7).

5. The petroleum coke unloading vehicle bottom cleaning mechanism according to claim 3, characterized in that: The vertical rotation driving structure comprises the cleaning end motor (7), the transmission shaft (5) and an elastic telescopic connection structure. The cleaning end motor (7) is arranged at the end of the rotating arm (2) and the main shaft facing downward is connected to the transmission shaft (5) located below the rotating arm (2). The elastic telescopic connection structure is arranged below the transmission shaft (5). The cleaning disc (6) is arranged at the lower end of the elastic telescopic connection structure. The axes of the transmission shaft (5), the elastic telescopic connection structure and the cleaning disc (6) are located on the same vertical straight line. The cleaning end motor (7) drives the transmission shaft (5), the elastic telescopic connection structure and the cleaning disc (6) to rotate. The elastic telescopic connection structure plays an elastic buffering role for the contact between the cleaning disc (6) and the bottom of the truck box (1).

6. A petroleum coke unloading vehicle bottom cleaning mechanism according to claim 4, characterized in that: The elastic telescopic connection structure comprises a sleeve (24), a compression spring (25), a lower connecting block (26) and an embedded slide rod (27); the sleeve (24) is arranged at the lower end of the transmission shaft (5); the embedded slide rod (27) is embedded in the lower end of the sleeve (24) from bottom to top; the lower connecting block (26) is arranged in the middle of the embedded slide rod (27); the compression spring (25) is arranged between the lower connecting block (26) and the lower end of the sleeve (24); the portion of the embedded slide rod (27) above the lower connecting block (26) is a square block structure, and the sleeve hole of the sleeve (24) corresponding to the embedding slide rod (27) is a square hole structure, so that the cleaning disc (6) can be elastically moved upward to a distance corresponding to the maximum compression amount of the compression spring (25).

7. A petroleum coke unloading vehicle bottom cleaning mechanism according to claim 6, characterized in that: The beam end joint structure comprises a bucket buckle block (3), a reinforcing pad block (8) and a lifting lug. The bucket buckle block (3) is a block structure with an opening facing downward and is used to buckle onto the upper side edge of the bucket box (1) from top to bottom. The bucket buckle block (3) is provided with the reinforcing pad block (8) on the left and right sides thereof for increasing the elasticity of contact with the upper side edge of the bucket box (1). The bucket buckle block (3) is provided with the lifting lug at the upper end thereof for connecting to the mobile crane outside the bucket box (1) via a cable.

8. A petroleum coke unloading vehicle bottom cleaning mechanism according to claim 7, characterized in that: A controller is provided on the bucket buckle block (3) where the sliding drive motor (17) is located. The controller is electrically connected to the sliding drive motor (17), the central motor (13) and the cleaning end motor (7) respectively. The power supply line and control line of the controller are respectively connected along the cables at the lifting ears to the mobile crane outside the bucket box (1) to obtain external power supply and control.

9. A method for cleaning the bottom of a petroleum coke unloading vehicle according to the petroleum coke unloading vehicle bottom cleaning mechanism according to any one of claims 1 to 8, characterized in that: The steps include: S1, when the petroleum coke truck is preliminarily unloaded, the front end of the truck bed (1) is lifted to present an inclined unloading state with the front higher and the rear lower, the main cross beam (4) is hoisted to the top of the truck bed (1) of the petroleum coke truck by the mobile crane and the cable, the two cleaning plates (6) are respectively pressed against the bottom of the truck bed (1) and the cleaning plate (6) at the front is in contact with the front wall of the truck bed (1), and the beam end joint structure is buckled from top to bottom to the upper ends of the left and right side walls of the truck bed (1); S2, controlling the two vertical rotation drive structures to start up through a control cabinet hung on the mobile crane outside the truck box (1), and controlling the mobile structure on the electric beam to drive the rotationally symmetrical arm structure to move left and right along the main cross beam (4) to achieve a sweeping action, and pushing the mobile crane outside the truck box (1) to move from the front of the vehicle to the rear of the vehicle to achieve overall cleaning of the bottom of the truck box (1); S3, after the vertical rotation drive structure stops, if it is found that there is still residue in the truck box (1), the mobile crane is controlled to pull the main cross beam (4) upwards, so that the beam end joint structure is separated from the truck box (1), and the mobile crane is pushed to return to the front end of the truck box (1), and then the main cross beam (4) is put back downwards, and the beam end joint structure is buckled to the upper end of the side wall of the truck box (1); S4, controlling the movable structure on the electric beam to drive the vertical rotating drive structure to move to the center of the main crossbeam (4), controlling the vertical rotating drive structure to move the two vertical rotating drive structures toward the left and right side walls of the truck box (1), respectively, starting the vertical rotating drive structure, and the two 6 respectively clean the left and right sides of the truck box (1), and at the same time, pushing the movable crane outside the truck box (1) from the front end to the rear end of the truck box (1), so as to realize the overall secondary cleaning of the bottom of the truck box (1); S5. Check the inside of the truck box (1). If any residue is found in the truck box (1), repeat steps S3 and S4. If the truck box (1) is clean, stop the machine, control the mobile crane to pull the main beam (4) upward until the cleaning plate (6) is separated from the truck box (1), and then control the rotationally symmetrical arm structure to move to one end of the main beam (4) under the drive of the mobile structure on the electric beam. The mobile crane moves the entire petroleum coke unloading underbody cleaning mechanism away from the front of the truck. At this time, the cleaning plate (6) is on one side of the truck to avoid contact with the truck.

10. A method for cleaning the bottom of a petroleum coke unloading vehicle according to claim 9, characterized in that: The mobile crane comprises a crane body, a mobile lifting beam (28), an electrically controlled lifting device (29), a control handle (30) and a lockable universal wheel (31); the central upper end of the crane body is the mobile lifting beam (28); the mobile lifting beam (28) is provided with the electrically controlled electrically controlled lifting device (29); the mobile lifting beam (28) is also provided with the control handle (30); and the bottom of the crane body is provided with the lockable universal wheel (31).

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