Low-density powder material unloading device

Abstract

The invention relates to a low-density powder material unloading device which comprises a negative pressure dust removal system, an unloading system and a supporting and moving system, the negative pressure dust removal system comprises a dust cover, a negative pressure fan and a dust removal device, and a butt joint opening of the dust cover can enable the dust cover to at least partially wrap a compartment from the tail of a high-barrier truck; the negative pressure fan is communicated with the dust removal opening through the dust removal device; the discharging system comprises a sleeve, a conveying spiral component and a rotary driving device, the first end of the sleeve is matched with the material taking opening and can reciprocate relative to the dust cover, a discharging opening communicated with the powder storage device is formed in the second end of the sleeve, and the rotary driving device is connected with the conveying spiral component; the supporting moving system is connected with the sleeve and the dustproof cover. According to the low-density powder material unloading device, dust dissipation can be avoided, the problem of pollution to the surrounding environment is solved, the unloading speed is increased, the unloading process is more stable, the unloading energy consumption and the unloading cost are reduced, a high-fence truck can be used for transporting powder materials, and the investment cost of transport vehicles and the material transport cost are reduced.

Description

Technical Field

[0001] This invention relates to the field of powder material unloading technology, and in particular to a low-density powder material unloading device. Background Technology

[0002] Coupling biomass fuels with coal-fired power plants can ensure the utilization of biomass resources, promote the low-carbon and clean development of coal-fired power, and at the same time, biomass fuels are easy to ignite and burn out. Coupling combustion with pulverized coal is conducive to stable combustion at low loads, improves the unit's flexibility and adjustment capabilities, and can achieve stable, safe, efficient and low-carbon combustion over a wide load range, ensuring the normal operation of the boiler unit under peak-shaving conditions.

[0003] For large-scale coal-fired power plant units to co-fire biomass, the biomass fuel needs to be processed into biomass powder fuel through processes such as drying, impurity removal, crushing, and pulverization to ensure the co-firing effect. At present, the transportation of powder materials often uses well-sealed transportation methods such as tank trucks. After being transported to the plant area by tank trucks, the material is directly transferred to storage tanks by pneumatic conveying.

[0004] However, biomass powder fuel has the problems of low bulk density and poor flowability. When transported by tanker truck, only about 10 tons can be transported at a time, resulting in high transportation costs. Furthermore, due to its poor flowability, the current positive pressure conveying system, which uses compressed air to transport the powder fuel from the tanker to the outside of the tanker, has problems such as the inability to output the powder fuel and easy blockage of the conveying pipeline, affecting the unloading speed. As a result, a large-power blower is required. The long-term operation of the high-power blower leads to high energy consumption of the unloading system. At the same time, due to the special physical characteristics of biomass powder fuel, tanker trucks used to transport materials such as fly ash and lime powder cannot be used to directly store and transport biomass powder. They must be modified before they can be used, which adds additional modification investment costs.

[0005] Besides tank trucks, high-sided trucks can also transport biomass powder materials after the cargo compartments are sealed. However, because the powder materials contain a lot of fine dust, and high-sided trucks often do not have a self-unloading function, they cannot achieve automatic unloading. At the same time, the problem of dust escape during the unloading process cannot be solved. Summary of the Invention

[0006] The purpose of this invention is to provide a low-density powder material unloading device, which can be used to unload powder materials in the cargo compartment of a high-sided truck, thereby increasing the unloading speed and reducing the transportation and unloading costs of biomass powder materials.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] In a first aspect of this application, a low-density powder material unloading device is provided for unloading low-density powder material from the cargo compartment of a high-sided truck into a powder storage device, the low-density powder material unloading device comprising:

[0009] The negative pressure dust removal system includes a dust cover, a negative pressure fan, and a dust removal device. The dust cover is provided with an interface, a material inlet, and a dust removal outlet. The interface and the material inlet are respectively located at both ends of the dust cover. The interface is configured to allow the dust cover to at least partially cover the cargo box from the rear of the high-sided truck. The negative pressure fan is connected to the dust removal outlet through the dust removal device.

[0010] The unloading system includes a sleeve, a conveying screw component, and a rotary drive device. The first end of the sleeve is adapted to the material inlet, and the first end of the sleeve can reciprocate relative to the dust cover along the direction from the material inlet to the mating interface. The second end of the sleeve is provided with a discharge port communicating with the powder storage device. The conveying screw component is rotatably disposed inside the sleeve. The rotary drive device is drivenly connected to the conveying screw component to drive the conveying screw component to rotate and convey powder material along the direction from the first end to the second end of the sleeve.

[0011] A support and movement system is connected to the sleeve and the dust cover. The support and movement system is used to drive the sleeve and the dust cover to reciprocate at least along the length of the cargo box of the high-sided truck.

[0012] In one possible implementation, a plurality of roller assemblies are provided at the bottom of the sleeve along the length of the sleeve, so that the sleeve is in rolling contact with the bottom of the dust cover and the bottom of the carriage.

[0013] In one possible implementation, a cleaning device is provided at the first end of the sleeve below the conveying screw component. The cleaning device is used to sweep the powder material at the bottom of the dust cover and the bottom of the carriage into the sleeve.

[0014] In one possible implementation, the cleaning device includes a cleaning shovel and a brush assembly. The first end of the cleaning shovel is connected to the first end of the sleeve. The cleaning shovel extends downward at an angle away from the first end of the sleeve until it is flush with the grounding end of the roller assembly. The brush assembly is disposed on the side of the cleaning shovel away from the sleeve. The brush assembly includes a brush body and a brush drive device. The brush drive device is used to drive the brush body to rotate so as to sweep the powder material at the bottom of the dust cover and the bottom of the carriage into the sleeve along the cleaning shovel.

[0015] In one possible implementation, a propulsion stop device is provided above the conveying screw component at the first end of the sleeve, the propulsion stop device being used to prevent the first end of the sleeve from being covered by powder material.

[0016] In one possible implementation, the propulsion stop device includes a support plate and a stop plate, a first end of the support plate being connected to a first end of the sleeve, a second end of the support plate extending obliquely upward in a direction away from the first end of the sleeve, and the stop plate being connected to a second end of the stop plate, wherein the axis of the stop plate is perpendicular to the axis of the sleeve.

[0017] In one possible implementation, the unloading system further includes a propulsion drive device, the rotary drive device being connected to the drive end of the propulsion drive device, the propulsion drive device driving the conveying screw component to reciprocate relative to the sleeve along the axis of the sleeve via the rotary drive device.

[0018] In one possible implementation, the negative pressure fan is connected to both the dust removal port and the powder storage device via the dust removal device.

[0019] In one possible implementation, a door opening mechanism is also included, which is disposed on the dust cover and is used to unlock the door latch of the cargo compartment of the high-sided truck when the dust cover moves relative to the cargo compartment of the high-sided truck to a preset position.

[0020] In one possible implementation, the support and movement system includes a hoisting support device, a moving guide rail, and at least two sets of hoisting assemblies. Each hoisting assembly includes a hoisting drive device and a lifting device. The moving guide rail is disposed on the hoisting support device. The hoisting drive device is reciprocally disposed on the moving guide rail. The first end of the lifting device is connected to the hoisting drive device. The second end of the lifting device of at least one set of the hoisting assemblies is connected to the dust cover. The second end of the lifting device of the remaining hoisting assemblies is connected to the sleeve.

[0021] As can be seen from the above technical solutions, this invention discloses a low-density powder material unloading device for unloading low-density powder materials from the cargo compartment of a high-sided truck to a powder storage device. The low-density powder material unloading device includes a negative pressure dust removal system, an unloading system, and a support and movement system. The negative pressure dust removal system includes a dust cover, a negative pressure fan, and a dust removal device. The dust cover is provided with an interface, a material inlet, and a dust removal outlet. The interface and the material inlet are respectively located at both ends of the dust cover. The interface is configured to allow the dust cover to at least partially cover the cargo compartment from the rear of the high-sided truck. The negative pressure fan is connected to the dust removal outlet through the dust removal device. The material feeding system includes a sleeve, a conveying screw component, and a rotary drive device. The first end of the sleeve is adapted to the material inlet, and the first end of the sleeve can reciprocate relative to the dust cover along the direction from the material inlet to the connecting interface. The second end of the sleeve is provided with a discharge port connected to the powder storage device. The conveying screw component is rotatably disposed inside the sleeve. The rotary drive device is driven to the conveying screw component to drive the conveying screw component to rotate and convey powder material along the direction from the first end to the second end of the sleeve. The support and movement system is connected to the sleeve and the dust cover, and the support and movement system is used to drive the sleeve and the dust cover to reciprocate at least along the length of the cargo box of the high-sided truck.

[0022] In application, a high-sided truck carrying low-density powder materials is parked at the designated unloading position. The supporting and moving system moves the dust cover and sleeve to the rear end of the truck bed, ensuring that the interface of the dust cover at least partially covers the truck bed. The sleeve extends into the material inlet of the dust cover from the end furthest from the interface. The negative pressure fan, dust removal device, and dust removal port are connected in sequence. Then, the negative pressure fan is started, creating a negative pressure airflow inside the dust cover along the direction from the interface to the dust removal port. During unloading, the powder material raised is driven by the negative pressure airflow and passes through the dust removal device for gas-solid separation, reducing dust emissions.

[0023] Then, the rotary drive device is activated to drive the conveying screw component to rotate. The screw blades of the conveying screw component drive the powder material from the bottom of the truck bed or dust cover into the sleeve and move along the sleeve from the first end to the second end. Finally, it enters the powder storage device from the discharge port. As the unloading proceeds, the support and moving system drives the sleeve and the conveying screw component inside the sleeve to gradually move towards the front of the truck bed until all the powder material in the truck bed is unloaded into the powder storage device.

[0024] The low-density powder material unloading device provided in this application uses a screw conveyor and negative pressure dust prevention to achieve dust-free unloading of powder materials from high-sided trucks. This avoids dust dispersion during the unloading process, solves the problem of environmental pollution around the unloading area, and is applicable to various powder materials, especially low-density, long-fiber materials. Compared with the current positive pressure unloading method of tank trucks, screw conveyor unloading is less prone to material blockage in pipelines, effectively improving unloading speed and making the unloading process more stable, while reducing unloading energy consumption and unloading costs. By adopting the above-mentioned low-density powder material unloading device, high-sided trucks can be used for powder material transportation, thus significantly reducing both the investment cost of transportation vehicles and the material transportation cost. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the low-density powder material unloading device provided in the embodiments of this application.

[0027] In the picture:

[0028] 100 represents the negative pressure dust removal system; 110 represents the dust cover; 120 represents the negative pressure fan; and 130 represents the dust removal device.

[0029] 200 is the unloading system; 210 is the sleeve; 220 is the conveying screw component; 230 is the rotary drive device; 240 is the cleaning device; 241 is the cleaning shovel; 242 is the sweeping brush assembly; 250 is the propulsion stop device; 251 is the support plate; 252 is the stop plate; 260 is the propulsion drive device.

[0030] 300 is the support and movement system; 310 is the hoisting support device; 320 is the hoisting drive device; 330 is the lifting tool;

[0031] 400 is the door opening mechanism;

[0032] 500 refers to a high-sided freight truck; 510 refers to a cargo box truck.

[0033] 600 is the unloading pit; 610 is the pit body; 620 is the pit cover. Detailed Implementation

[0034] The core of this invention is to provide a low-density powder material unloading device. The structural design of this low-density powder material unloading device enables it to be used for unloading powder materials in the cargo compartment of high-sided trucks, thereby increasing the unloading speed and reducing the transportation and unloading costs of biomass powder materials.

[0035] 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.

[0036] This application provides a low-density powder material unloading device for unloading low-density powder materials from the cargo compartment 510 of a high-sided truck 500 to a powder storage device, such as... Figure 1 As shown, the low-density powder material unloading device includes a negative pressure dust removal system 100, an unloading system 200, and a support and movement system 300.

[0037] The negative pressure dust removal system 100 includes a dust cover 110, a negative pressure fan 120, and a dust removal device 130. The dust cover 110 is provided with an interface, a material inlet, and a dust removal port. The interface and the material inlet are respectively located at both ends of the dust cover 110. The interface is configured to allow the dust cover 110 to at least partially cover the cargo compartment 510 from the rear of the high-sided truck 500. In order to ensure that all powder materials in the cargo compartment 510 can be unloaded, the unloading system 200 should enter along the bottom of the cargo compartment 510. Therefore, the bottom of the dust cover 110 is basically flush with the bottom of the cargo compartment 510, and the material inlet is also set along the bottom of the dust cover 110 so that the unloading system 200 in this application can move along the bottom of the cargo compartment 510.

[0038] The negative pressure fan 120 is used to generate negative pressure in the dust cover 110 to extract the dust raised during the unloading process. The negative pressure fan 120 is connected to the dust removal port through the dust removal device 130.

[0039] The dust removal device 130 is used for gas-solid separation to prevent dust from entering the negative pressure fan 120. The dust removal device 130 includes, but is not limited to, cyclone separators and bag filters. The dust removal device 130 may consist of only one cyclone separator or one bag filter, or it may consist of multiple cyclone separators connected in series or multiple bag filters connected in series, or it may consist of at least one cyclone separator and at least one bag filter connected in series, in order to further reduce the dust carried in the airflow.

[0040] The unloading system 200 includes a sleeve 210, a conveying screw component 220, and a rotary drive device 230. The sleeve 210 is a hollow cylindrical shape with openings at both ends for the conveying screw component 220 to enter and exit. The first end of the sleeve 210 is adapted to the feeding port, and the first end of the sleeve 210 can reciprocate relative to the dust cover 110 along the direction from the feeding port to the docking port. The second end of the sleeve 210 is provided with a discharge port that communicates with the powder storage device. The discharge port is connected to the powder storage device through a discharge valve. A weighing device can be installed on the discharge valve to weigh the powder material output by the sleeve 210 in order to obtain the weight information of the powder material stored in the powder storage device.

[0041] The conveying screw component 220 includes a main shaft and helical blades fixedly mounted on the main shaft. The helical blades extend spirally from one end of the main shaft to the other end. The main shaft is connected to the drive end of the rotary drive device 230. When the main shaft drives the helical blades to rotate, the helical blades push the powder material to move along the axial direction of the main shaft. The conveying screw component 220 is rotatably mounted inside the sleeve 210. The rotary drive device 230 is connected to the conveying screw component 220 to drive the conveying screw component 220 to rotate and convey the powder material along the direction from the first end to the second end of the sleeve 210.

[0042] The rotary drive device 230 includes, but is not limited to, servo motors and stepper motors. During the unloading process, the rotation speed of the rotary drive device 230 can be adjusted according to the type of powder material to achieve the best unloading effect.

[0043] The number of unloading systems 200 can be one or more. The width of the first end of the sleeve 210 is preferably designed according to the inner width of the carriage 510. That is, the inner width of the carriage 510 is preferably a positive integer multiple of the width of the first end of the sleeve 210. Thus, the corresponding number and width of sleeves 210 are configured according to the inner width of the carriage 510, so that the unloading system 200 can cover the entire inner width of the carriage 510 to increase the unloading efficiency. Of course, only one unloading system 200 can be set up, and the powder material in the entire carriage 510 can be sucked up by reciprocating along the width and length directions of the carriage 510.

[0044] The support and movement system 300 is connected to the sleeve 210 and the dust cover 110. The support and movement system 300 is used to drive the sleeve 210 and the dust cover 110 to move back and forth at least along the length of the cargo box 510 of the high-sided truck 500.

[0045] In application, a high-sided truck 500 carrying low-density powder materials is parked at the designated unloading position. The support and movement system 300 moves the dust cover 110 and the sleeve 210 to the rear end of the truck bed 510 of the high-sided truck 500, so that the interface of the dust cover 110 at least partially covers the truck bed 510. The sleeve 210 extends into the material inlet of the dust cover 110 from the end away from the interface. The negative pressure fan 120, the dust removal device 130 and the dust removal port are connected in sequence. Then the negative pressure fan 120 is started. The negative pressure fan 120 forms a negative pressure airflow in the dust cover 110 along the direction from the interface to the dust removal port. The powder material raised during the unloading process is driven by the negative pressure airflow and passes through the dust removal device 130 for gas-solid separation, reducing dust emissions.

[0046] Then, the rotary drive device 230 is started, driving the conveying screw component 220 to rotate. The screw blades of the conveying screw component 220 drive the powder material from the bottom of the carriage 510 or dust cover 110 into the sleeve 210 and move along the sleeve 210 from the first end to the second end. Finally, it enters the powder storage device from the discharge port. As the unloading proceeds, the support and movement system 300 drives the sleeve 210 and the conveying screw component 220 inside the sleeve 210 to gradually move towards the front of the high-sided truck 500 until all the powder material in the carriage 510 is unloaded into the powder storage device.

[0047] Compared with the prior art, the low-density powder material unloading device provided in this application adopts a screw conveyor and negative pressure dust prevention method to achieve dust-free unloading of powder materials on a high-sided truck 500. This can avoid the dust emission of powder materials during the unloading process, solve the problem of environmental pollution around the unloading area, and is applicable to various powder materials, especially low-density, long-fiber materials. Compared with the current positive pressure unloading method of tank trucks, screw conveyor unloading is less likely to cause material blockage in the pipeline, which can effectively improve the unloading speed and make the unloading process more stable, and reduce unloading energy consumption and unloading costs. By adopting the above-mentioned low-density powder material unloading device, high-sided trucks 500 can be used for powder material transportation, so both the investment cost of the transport vehicle and the material transportation cost can be significantly reduced.

[0048] To reduce collision and friction between the dust cover 110 and the cargo box 510 of the high-sided truck 500, a flexible connection device is provided at the interface of the dust cover 110. The dust cover 110 is connected to the cargo box 510 of the high-sided truck 500 through the flexible connection device. The flexible connection device includes, but is not limited to, a rubber strip set on the inner edge of the interface of the dust cover 110 and a corrugated pipe set on the interface of the dust cover 110.

[0049] To reduce the frictional resistance of the sleeve 210 relative to the carriage 510 and the dust cover 110 during movement, and to improve the stability of the sleeve 210 during movement relative to the carriage 510 and the dust cover 110, in one embodiment of this application, such as Figure 1 As shown, multiple roller assemblies are arranged at the bottom of the sleeve 210 along the length direction of the sleeve 210, that is, along the axial direction of the sleeve 210. Each roller assembly includes two or more rollers. The rollers of each roller assembly are coaxial and their axes are perpendicular to the axis of the sleeve 210, so that the sleeve 210 rolls with the bottom of the dust cover 110 and the bottom of the carriage 510, thereby reducing the frictional resistance when the sleeve 210 moves relative to the carriage 510 and the dust cover 110, and supporting the sleeve 210.

[0050] It is foreseeable that, due to the installation of the aforementioned roller assembly, the distance between the bottom of the sleeve 210 and the dust cover 110 and the bottom of the carriage 510 increases, causing the powder material in this range to be unable to enter the sleeve 210 by being pushed by the conveying screw component 220. Therefore, in one embodiment of this application, a cleaning device 240 is provided at the first end of the sleeve 210 below the conveying screw component 220. The cleaning device 240 is used to clean the powder material at the bottom of the dust cover 110 and the bottom of the carriage 510 into the sleeve 210.

[0051] Specifically, such as Figure 1 As shown, the cleaning device 240 includes a cleaning shovel 241 and a brush assembly 242. The first end of the cleaning shovel 241 is connected to the first end of the sleeve 210. The cleaning shovel 241 extends downwards at an angle away from the first end of the sleeve 210 until it is flush with the grounding end of the roller assembly, forming an inclined ramp from the bottom of the dust cover 110 and the bottom of the carriage 510 towards the sleeve 210, allowing powdered material to move from the bottom of the dust cover 110 and the bottom of the carriage 510 into the sleeve 210. The width of the cleaning shovel 241 can be the same as or slightly larger than the width of the sleeve 210.

[0052] The brush assembly 242 is disposed on the side of the cleaning shovel 241 away from the sleeve 210. The brush assembly 242 includes a brush body and a brush drive device. The brush drive device is used to drive the brush body to rotate so as to sweep the powder material at the bottom of the dust cover 110 and the bottom of the compartment 510 along the cleaning shovel 241 into the sleeve 210. The brush assembly 242 may include one or more brush bodies. The rotation axis of the brush body may be perpendicular or approximately perpendicular to the bottom of the dust cover 110 and the bottom of the compartment 510, or it may be parallel or approximately parallel to the bottom of the dust cover 110 and the bottom of the compartment 510.

[0053] It should be noted that the brush body can be fixed relative to the sleeve 210, meaning the brush body can only rotate relative to the brush drive device, or it can be movably set relative to the sleeve 210, meaning the brush assembly 242 also includes a position adjustment device. The brush body is fixed to the drive end of the position adjustment device through the brush drive device. The position adjustment device drives the brush drive device and the brush body to swing back and forth relative to the sleeve 210 to further improve the cleaning effect and increase the cleaning coverage area.

[0054] It is foreseeable that the unloading system 200 in this embodiment of the application uses a screw conveyor to unload from the bottom of the powder material pile. As the unloading proceeds, the material above the powder material pile will collapse downwards after losing its support, which may easily bury the first end of the sleeve 210, causing this part of the powder material to be unable to be unloaded outward through the sleeve 210. Therefore, in one embodiment of this application, a propulsion stop device 250 is provided above the conveying screw component 220 at the first end of the sleeve 210. The propulsion stop device 250 is used to prevent the first end of the sleeve 210 from being covered by the powder material. That is, during the unloading process, the propulsion stop device 250 pushes against the powder material above the first end of the sleeve 210, so that the powder material falls in front of the first end of the sleeve 210 when it collapses, thus preventing the first end of the sleeve 210 from being buried.

[0055] Specifically, such as Figure 1 As shown, the propulsion stop device 250 includes a support plate 251 and a stop plate 252. The first end of the support plate 251 is connected to the first end of the sleeve 210, and the second end of the support plate 251 extends upward at an inclination away from the first end of the sleeve 210. The stop plate 252 is connected to the second end of the stop plate 252, and the axis of the stop plate 252 and the sleeve 210 are perpendicular. In this way, the stop plate 252 is located obliquely above the first end of the sleeve 210, which can effectively control the collapse direction of the powder material.

[0056] To further optimize the above technical solution, since the sleeve 210 needs to be connected to the support and moving system 300, its stroke relative to the dust cover 110 is easily restricted by the support and moving system 300. Therefore, in one embodiment of this application, the unloading system 200 also includes a propulsion drive device 260, and a rotary drive device 230 is connected to the drive end of the propulsion drive device 260. The propulsion drive device 260 drives the conveying screw component 220 to reciprocate relative to the sleeve 210 along the axis of the sleeve 210 through the rotary drive device 230. When the sleeve 210 can no longer move relative to the dust cover 110 toward the front of the high-sided truck 500, the propulsion drive device 260 can push the conveying screw component 220 relative to the sleeve 210 toward the front of the high-sided truck 500 to achieve unloading of the powder material in the entire truck body 510. Of course, the propulsion drive device 260 can also be used to adjust the relative position of the conveying screw component 220 and the sleeve 210 to achieve a better unloading effect.

[0057] In one embodiment of this application, the powder storage device is a discharge pit 600, which is composed of a pit body 610 and a pit cover 620. The pit cover 620 covers the upper opening of the pit body 610. The discharge port of the sleeve 210 is sealed with the pit cover 620 through a hose. The length of the hose needs to meet the stroke requirements of the sleeve 210. The discharge port of the sleeve 210 is connected to the discharge pit 600 through the hose.

[0058] A bottom conveying device is installed at the bottom of the pit body 610, which can quickly transport powder materials to downstream processes.

[0059] In order to prevent dust from being stirred up in the unloading pit 600, in one embodiment of this application, the negative pressure fan 120 is connected to the dust removal port and the powder storage device through the dust removal device 130, so that the dust cover 110 and the powder storage device, that is, the unloading pit 600, are in a negative pressure state during the unloading process.

[0060] To further optimize the above technical solution, a concentration separation device is also installed upstream of the dust removal device 130. The concentration separation device divides the dust-containing airflow into a dense phase airflow with a higher dust concentration and a light phase airflow with a lower dust concentration. The light phase airflow with a lower dust concentration can be connected to the sleeve 210 upstream of the discharge port through a purging pipe to purge the powder material that has not fallen off the conveying screw component 220, thus preventing some powder material from adhering to the conveying screw component 220 and not falling into the powder storage device from the discharge port. The dense phase airflow with a higher dust concentration enters the dust removal device 130 for gas-solid separation.

[0061] It is foreseeable that the unloading tailgate of the truck body 510 cannot be opened before the dust cover 110 is placed outside the truck body 510. However, when the dust cover 110 is placed outside the unloading tailgate of the truck body 510, it will block the latch of the unloading tailgate of the truck body 510. Of course, if the latch of the unloading tailgate of the truck body 510 of the high-sided truck 500 is an automatic opening and closing structure, there will be no impact. If the latch of the unloading tailgate of the truck body 510 of the high-sided truck 500 is a manual opening and closing structure, the dust cover 110 will affect the operation of the latch of the unloading tailgate of the truck body 510. Therefore, in one embodiment of this application, the low-density powder material unloading device also includes a door opening mechanism 400. The door opening mechanism 400 is disposed on the dust cover 110. The door opening mechanism 400 is used to unlock the latch of the truck body 510 of the high-sided truck 500 when the dust cover 110 moves relative to the truck body 510 of the high-sided truck 500 to a preset position.

[0062] The door opening mechanism 400 includes a door opening drive unit located inside the dust cover 110 and a door opening operation unit located outside the dust cover 110. The door opening operation unit is connected to the door opening drive unit. The door opening drive unit is designed according to the location and structure of the door latch of the cargo box 510 of the high-sided truck 500. The door opening drive unit can adopt a linkage structure and a combination of grippers. The grippers grasp the door latch for operation. The door opening operation unit is used to manipulate the linkage structure to drive the grippers to move and open and close. By setting the door opening mechanism 400, after the dust cover 110 is placed over the cargo box 510, the door latch of the cargo box 510 can be operated by the door opening mechanism 400 to open the unloading tailgate of the cargo box 510.

[0063] Please see Figure 1 The support and movement system 300 includes a hoisting support device 310, a moving guide rail, and at least two sets of hoisting components. The hoisting components include a hoisting drive device 320 and a lifting device 330. The moving guide rail is disposed on the hoisting support device 310. The hoisting drive device 320 is disposed on the moving guide rail and can reciprocate along the moving guide rail. The first end of the lifting device 330 is connected to the hoisting drive device 320. The second end of the lifting device 330 of at least one set of hoisting components is connected to the dust cover 110. The second end of the lifting device 330 of the remaining hoisting components is connected to the sleeve 210.

[0064] The lifting device 330 can be a rigid structure, such as a boom, or a flexible structure, such as a sling or rope. When the lifting device 330 is a flexible structure, the lifting drive device 320 can include a traveling drive device and a lifting drive device. The lifting drive device is mounted on a moving guide rail via the traveling drive device. One or more lifting drive devices can be mounted on one traveling drive device. The first end of the lifting device 330 is connected to the lifting drive device. The lifting drive device can wind up and down the lifting device 330 to raise and lower the dust cover 110 and the sleeve 210. Specifically, the traveling drive device can be a crane, and the lifting drive device can be an electric hoist.

[0065] In summary, please refer to Figure 1 In application, after the high-sided truck 500 enters the designated unloading position, the dust cover 110 is moved to the rear of the truck bed 510 of the high-sided truck 500 by the support and moving system 300, and the dust cover 110 is flexibly connected to the rear of the truck bed 510 of the high-sided truck 500, ensuring that the dust cover 110 at least partially covers the rear of the truck bed 510 of the high-sided truck 500. This application starts unloading from the rear of the truck bed 510 of the high-sided truck 500.

[0066] Then, the sleeve 210 of the unloading system 200 is inserted into the dust cover 110 through the material inlet, so that the roller assembly at the bottom of the sleeve 210 contacts and engages with the bottom of the dust cover 110 to support the sleeve 210. The negative pressure dust removal system 100 is started to create a negative pressure inside the dust cover 110. The unloading tail door of the carriage 510 is opened. The relative position of the sleeve 210 and the conveying screw component 220 is adjusted by the push drive device 260. After the adjustment is completed, the rotary drive device 230 and the cleaning device 240 of the unloading system 200 are turned on to start unloading. The unloading speed can be adjusted by adjusting the rotation speed of the rotary drive device 230. During the unloading process, the dust raised enters the dust removal device 130 through the dust removal port under the action of negative pressure for gas-solid separation, avoiding leakage and pollution of the surrounding environment of the unloading site.

[0067] As the unloading and conveying process proceeds, the supporting moving system 300 moves the sleeve 210 and the conveying screw component 220 towards the front of the high-sided truck 500. The sleeve 210, along with the roller assembly below, enters the interior of the truck body 510 through the dust cover 110. During the movement, the propulsion stop device 250 comes into contact with the powder material, guiding the powder material to fall in front of the first end of the sleeve 210, preventing the first end of the sleeve 210 from being covered by the powder material.

[0068] When the sleeve 210 can no longer move forward relative to the dust cover 110 and the carriage 510, the propulsion drive device 260 is activated, so that the conveying screw component 220 continues to move forward a certain distance relative to the sleeve 210, and finally realizes the complete conveying of all the powder material inside the carriage 510 and completes the unloading process.

[0069] As can be seen, the low-density powder material unloading device provided in this application embodiment can unload low-density powder materials in bulk without dust. It uses a screw conveyor and negative pressure adsorption method for unloading, eliminating dust emission during the unloading process and solving the problem of environmental pollution around the unloading area. Furthermore, it can complete an unloading process in 15-20 minutes, increasing the unloading speed from less than 10 t / h to 60 t / h or even higher, greatly improving operating efficiency. The conveying channel (inside the sleeve 210) of the screw conveyor is less prone to blockage, making the entire unloading process more stable and reliable. After using this invention, sealed high-sided trucks 500 can be used for material transportation, significantly reducing both vehicle investment costs and material transportation costs.

[0070] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0071] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0072] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0073] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A low-density powder material unloading device for unloading low-density powder materials from the cargo compartment (510) of a high-sided truck (500) to a powder storage device, characterized in that, The low-density powder material unloading device includes: The negative pressure dust removal system (100) includes a dust cover (110), a negative pressure fan (120), and a dust removal device (130). The dust cover (110) is provided with a docking port, a material inlet, and a dust removal port. The docking port and the material inlet are respectively located at both ends of the dust cover (110). The docking port is configured to allow the dust cover (110) to at least partially cover the cargo compartment (510) from the rear of the high-sided truck (500). The negative pressure fan (120) is connected to the dust removal port through the dust removal device (130). The unloading system (200) includes a sleeve (210), a conveying screw component (220), and a rotary drive device (230). The first end of the sleeve (210) is adapted to the feeding port, and the first end of the sleeve (210) can reciprocate relative to the dust cover (110) along the direction from the feeding port to the docking port. The second end of the sleeve (210) is provided with a discharge port communicating with the powder storage device. The conveying screw component (220) is rotatably disposed inside the sleeve (210). The rotary drive device (230) is connected to the conveying screw component (220) to drive the conveying screw component (220) to rotate and convey powder materials along the direction from the first end to the second end of the sleeve (210). A support movement system (300) is connected to the sleeve (210) and the dust cover (110). The support movement system (300) is used to drive the sleeve (210) and the dust cover (110) to reciprocate at least along the length of the cargo box (510) of the high-sided truck (500).

2. The low-density powder material unloading device according to claim 1, characterized in that, The bottom of the sleeve (210) is provided with a plurality of roller assemblies along the length of the sleeve (210) so that the sleeve (210) is in rolling contact with the bottom of the dust cover (110) and the bottom of the carriage (510).

3. The low-density powder material unloading device according to claim 2, characterized in that, The first end of the sleeve (210) is provided with a cleaning device (240) below the conveying screw component (220). The cleaning device (240) is used to sweep the powder material at the bottom of the dust cover (110) and the bottom of the carriage (510) into the sleeve (210).

4. The low-density powder material unloading device according to claim 3, characterized in that, The cleaning device (240) includes a cleaning shovel (241) and a brush assembly (242). The first end of the cleaning shovel (241) is connected to the first end of the sleeve (210). The cleaning shovel (241) extends downward at an angle away from the first end of the sleeve (210) until it is flush with the ground end of the roller assembly. The brush assembly (242) is located on the side of the cleaning shovel (241) away from the sleeve (210). The brush assembly (242) includes a brush body and a brush drive device. The brush drive device is used to drive the brush body to rotate so as to sweep the powder material at the bottom of the dust cover (110) and the bottom of the compartment (510) along the cleaning shovel (241) into the sleeve (210).

5. The low-density powder material unloading device according to any one of claims 1-4, characterized in that, The first end of the sleeve (210) is provided with a propulsion stop device (250) above the conveying screw component (220), and the propulsion stop device (250) is used to prevent the first end of the sleeve (210) from being covered by powder material.

6. The low-density powder material unloading device according to claim 5, characterized in that, The propulsion stop device (250) includes a support plate (251) and a stop plate (252). The first end of the support plate (251) is connected to the first end of the sleeve (210). The second end of the support plate (251) extends upward at an angle away from the first end of the sleeve (210). The stop plate (252) is connected to the second end of the stop plate (252), and the axis of the stop plate (252) and the sleeve (210) are perpendicular.

7. The low-density powder material unloading device according to any one of claims 1-4, characterized in that, The unloading system (200) further includes a propulsion drive device (260), and the rotary drive device (230) is connected to the drive end of the propulsion drive device (260). The propulsion drive device (260) drives the conveying screw component (220) to reciprocate relative to the sleeve (210) along the axis of the sleeve (210) through the rotary drive device (230).

8. The low-density powder material unloading device according to any one of claims 1-4, characterized in that, The negative pressure fan (120) is connected to the dust removal port and the powder storage device through the dust removal device (130).

9. The low-density powder material unloading device according to any one of claims 1-4, characterized in that, It also includes a door opening mechanism (400) disposed on the dust cover (110), the door opening mechanism (400) being used to unlock the door latch of the cargo compartment (510) of the high-sided truck (500) when the dust cover (110) moves relative to the cargo compartment (510) of the high-sided truck (500) to a preset position.

10. The low-density powder material unloading device according to any one of claims 1-4, characterized in that, The support and movement system (300) includes a hoisting support device (310), a moving guide rail, and at least two sets of hoisting components. The hoisting components include a hoisting drive device (320) and a lifting device (330). The moving guide rail is disposed on the hoisting support device (310). The hoisting drive device (320) is disposed on the moving guide rail and can reciprocate along the moving guide rail. The first end of the lifting device (330) is connected to the hoisting drive device (320). The second end of the lifting device (330) of at least one set of the hoisting components is connected to the dust cover (110). The second end of the lifting device (330) of the remaining hoisting components is connected to the sleeve (210).

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