Low-density powder material negative pressure unloading device

Abstract

The present application relates to a kind of low-density powder material negative pressure unloading device, including negative pressure powder conveying system and support moving system, negative pressure powder conveying system includes powder collecting device, gas-solid separation device and conveying fan, powder collecting device has the suction inlet and output port of intercommunication, the output port of powder collecting device, gas-solid separation device and conveying fan are in series by conveying pipeline in turn, conveying fan is used to form negative pressure airflow in powder collecting device, the discharge port of gas-solid separation device is connected with powder storage device;Support moving system is connected with powder collecting device, to drive powder collecting device reciprocating movement along the length direction of the carriage of high fence car.The low-density powder material unloading device can avoid dust dispersion during unloading process, solve the problem of environmental pollution around unloading, can effectively improve unloading speed and make unloading process more stable, can use high fence car for powder material transportation, and transportation vehicle investment cost and material transportation cost can be greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of powder material unloading technology, and in particular to a negative pressure unloading device for low-density powder materials. 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 cannot effectively discharge the powder fuel and the conveying pipeline is prone to blockage when transporting it from the tanker to the outside of the tanker by compressed air. This affects the unloading speed and requires a large-power blower, resulting in 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 investment costs for modification.

[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 negative pressure unloading device for low-density powder materials, so that it can be used to unload 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.

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

[0008] In a first aspect of this application, a negative pressure unloading device for low-density powder materials is provided 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:

[0009] A negative pressure powder conveying system includes a powder collection device, a gas-solid separation device, and a conveying fan. The powder collection device has a connected inlet and outlet. The outlet of the powder collection device, the gas-solid separation device, and the conveying fan are connected in series through a conveying pipeline. The conveying fan is used to create a negative pressure airflow in the powder collection device to draw powder from the cargo compartment of the high-sided truck through the inlet. The outlet of the gas-solid separation device is connected to the powder storage device. The gas-solid separation device is used to separate the powder from the airflow and allow the separated powder to enter the powder storage device from the outlet.

[0010] A supporting moving system is connected to the powder collecting device, and the supporting moving system is used to drive the powder collecting device to reciprocate at least along the length of the cargo box of the high-sided truck.

[0011] In one possible implementation, the powder collection device includes a purge sleeve, a suction sleeve, and a dust cover. The small end of the dust cover is connected to the suction sleeve, the large end of the dust cover is the suction port, the end of the suction sleeve away from the dust cover is the output port, the first end of the purge sleeve extends into the dust cover and faces the same direction as the large end of the dust cover, and the second end of the purge sleeve is connected to the fan outlet of the conveying fan.

[0012] In one possible implementation, the position of the purge sleeve relative to the dust cover is adjustable such that the distance between the first end of the purge sleeve and the large end of the dust cover is adjustable in a direction perpendicular to the plane containing the large end of the dust cover.

[0013] In one possible implementation, a swirl vane is provided inside the second end of the purge sleeve.

[0014] In one possible implementation, the powder collection device further includes a guide support device, which includes a support plate and a movable guide device. The support plate is rotatably disposed on the dust cover, and the support plate can rotate at least between a first position and a second position relative to the dust cover. The first position is a position where one side of the dust cover is parallel to the plane where the large end of the dust cover is located, and the second position is a position that covers the large end of the dust cover.

[0015] The moving guide device is provided on both sides of the support plate, and the moving guide device is used to cooperate with the top of the side rails on both sides of the cargo box of the high-sided truck in the width direction.

[0016] The dust cover and the support plate are respectively connected to the support moving system. The support moving system is used to drive the dust cover and the support plate to reciprocate at least along the length of the cargo box of the high-sided truck, and to drive the dust cover and the support plate to rotate relative to each other.

[0017] In one possible implementation, the powder collection device further includes a purge pipe, at least one of the purge pipes is provided on the side of the dust cover away from the guide support device, and the purge pipe is connected to the fan outlet of the conveying fan.

[0018] In one possible implementation, the blower outlet of the conveying fan is connected in parallel with a first branch pipe and a second branch pipe. The first branch pipe is connected to the purging pipe and the purging sleeve, respectively, and the second branch pipe is connected to the dust removal device. Adjusting valves are respectively installed on the first branch pipe and the second branch pipe.

[0019] In one possible implementation, the outlet of the conveying fan is connected to the first branch pipe and the second branch pipe via a material guiding device, which is used to separate powder and airflow.

[0020] In one possible implementation, the moving guide device includes a plurality of rollers arranged in a straight line, each roller having a parallel axis of rotation, and the rollers having circumferentially provided limiting annular grooves for fitting with the top of the side rails on both sides of the cargo compartment of the high-sided truck.

[0021] 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 drive device, a hoisting device, and a sling. The moving guide rail is disposed on the hoisting support device. The hoisting device is reciprocally disposed on the moving guide rail. The drive device is used to drive the hoisting device to reciprocate along the moving guide rail. The first end of the sling is connected to the hoisting device, and the hoisting device is used to retract and extend the sling. The second end of the sling of at least one set of the hoisting assemblies is connected to the support plate. The second ends of the slings of the remaining hoisting assemblies are connected to the dust cover and / or the suction sleeve.

[0022] As can be seen from the above technical solution, the present invention discloses a negative pressure unloading device for low-density powder materials, used to unload 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 powder conveying system and a supporting moving system. The negative pressure powder conveying system includes a powder collection device, a gas-solid separation device, and a conveying fan. The powder collection device has a connected inlet and outlet. The outlet of the powder collection device, the gas-solid separation device, and the conveying fan are connected in series through a conveying pipeline. The conveying fan is used to form a negative pressure airflow in the powder collection device to draw the powder material from the cargo compartment of the high-sided truck from the inlet. The outlet of the gas-solid separation device is connected to the powder storage device. The gas-solid separation device is used to separate the powder material from the airflow and allow the separated powder material to enter the powder storage device from the outlet. The supporting moving system is connected to the powder collection device and is used to drive the powder collection device to reciprocate at least along the length of the cargo compartment of the high-sided truck.

[0023] In application, a high-sided truck carrying low-density powder materials is parked at the designated unloading position. The support and movement system moves the powder collection device to one end of the truck bed, bringing the inlet of the powder collection device close to the powder material inside the truck bed. Then, the conveying fan is started, creating a negative pressure airflow from the inlet to the outlet within the powder collection device. Driven by the negative pressure airflow, the powder material passes through the powder collection device and enters the gas-solid separation device. In the gas-solid separation device, the powder material is separated from the airflow. The powder material separated by the gas-solid separation device enters the powder storage device through the outlet at the bottom of the gas-solid separation device. After the powder material at the inlet of the powder collection device is unloaded, the support and movement system moves the powder collection device to the other end of the truck bed at a predetermined speed or distance 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 negative pressure to extract airflow and powder material into a gas-solid separation device to unload powder material from high-sided trucks. This avoids dust dispersion during unloading, solves the problem of environmental pollution around the unloading area, and is applicable to various powder materials, especially low-density, long-fiber materials. Because the material is transported by negative pressure airflow, it is less likely to cause material blockage in the pipeline. Therefore, the requirements for fan power are not high, which can effectively improve the unloading speed and make the unloading process more stable, reduce unloading energy consumption, and reduce 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 the transportation vehicle 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 Schematic diagram of the structure of the low-density powder material unloading device provided in the embodiments of this application Figure 1 ;

[0027] Figure 2 Schematic diagram of the structure of the low-density powder material unloading device provided in the embodiments of this application Figure 2 ;

[0028] Figure 3 This is a partial schematic diagram of the powder collection device of the low-density powder material unloading device provided in the embodiments of this application.

[0029] In the picture:

[0030] 100 is a negative pressure powder conveying system; 110 is a powder collection device; 111 is a blowing sleeve; 112 is a suction sleeve; 113 is a dust cover; 114 is a guide support device; 1141 is a support plate; 1142 is a moving guide device; 115 is a swirl vane; 116 is a blowing pipe; 120 is a gas-solid separation device; 121 is a discharge port; 122 is a separation inlet; 123 is a separation outlet; 124 is a discharge valve; 130 is a conveying fan; 140 is a conveying pipeline; 150 is the first branch pipe; 160 is the second branch pipe; 170 is a regulating valve; 180 is a dust removal device; 190 is a material guiding device.

[0031] 200 is the support and movement system; 210 is the hoisting support device; 220 is the lifting device; 230 is the sling;

[0032] 300 refers to a high-sided freight truck; 310 refers to a cargo box truck.

[0033] 400 is a powder storage device. Detailed Implementation

[0034] The core of this invention is to provide a negative pressure unloading device for low-density powder materials. 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 negative pressure unloading device for low-density powder materials, used to unload low-density powder materials from the cargo compartment 310 of a high-sided truck 300 to a powder storage device 400, such as... Figure 1 As shown, the low-density powder material unloading device includes a negative pressure powder conveying system 100 and a support and moving system 200.

[0037] The negative pressure powder conveying system 100 includes a powder collection device 110, a gas-solid separation device 120, and a conveying fan 130. The powder collection device 110 has a connected inlet and outlet, that is, the inlet and outlet are connected through the internal conveying channel of the powder collection device 110. The powder collection device 110 may include one or more inlets. The width of the inlet can be designed according to the inner width of the cargo box 310 of the high-sided truck 300. It should be noted that the inner width of the cargo box 310 is preferably a positive integer multiple of the width of the inlet of the powder collection device 110, so as to design a corresponding number of inlets, so that the negative pressure powder conveying system 100 can simultaneously perform negative pressure suction of powder material on the entire width of the cargo box 310. Of course, only one inlet can be set, and the powder material in the entire cargo box 310 can be suctioned by reciprocating along the width or length direction of the cargo box 310.

[0038] The output port of the powder collection device 110, the gas-solid separation device 120, and the conveying fan 130 are connected in series through the conveying pipeline 140. The gas-solid separation device 120 has a separation inlet 122, a separation outlet 123, and a discharge port 121. The separation inlet 122 is connected to the output port of the powder collection device 110 through the conveying pipeline 140, and the separation outlet 123 is connected to the fan inlet of the conveying fan 130. The conveying fan 130 is used to form a negative pressure airflow in the powder collection device 110 to draw the powder in the cargo compartment 310 of the high-sided truck 300 from the suction port of the powder collection device 110.

[0039] The outlet 121 of the gas-solid separation device 120 is connected to the powder storage device 400. The gas-solid separation device 120 is used to separate the powder from the airflow. The separated powder enters the powder storage device 400 from the outlet 121 at the bottom of the gas-solid separation device 120 under the action of gravity. The gas-solid separation device 120 includes, but is not limited to, a cyclone separator and a bag filter.

[0040] Specifically, the outlet 121 of the gas-solid separation device 120 is connected to the powder storage device 400 through the discharge valve 124. A weighing device can be installed on the discharge valve 124 to weigh the powder material separated by the gas-solid separation device 120 in order to obtain the weight information of the powder material stored in the powder storage device 400.

[0041] like Figure 1 As shown, in one embodiment of this application, the gas-solid separation device 120 is a cyclone separator. However, it should be noted that this is only a preferred embodiment provided by this application, and it is not actually limited to this. Multiple cyclone separators can be connected in series to form the gas-solid separation device 120, or a cyclone separator and a bag filter can be connected in series to form the gas-solid separation device 120, so as to further reduce the dust carried in the airflow.

[0042] The support and movement system 200 is connected to the powder collection device 110. The support and movement system 200 is used to drive the powder collection device 110 to move back and forth at least along the length of the cargo box 310 of the high-sided truck 300.

[0043] In application, a high-sided truck 300 carrying low-density powder materials is parked at the designated unloading position. The support and movement system 200 moves the powder collection device 110 to one end of the truck bed 310 of the high-sided truck 300, bringing the inlet of the powder collection device 110 close to the powder material inside the truck bed 310. Then, the conveying fan 130 is started, creating a negative pressure airflow in the powder collection device 110 along the direction from the inlet to the outlet. The powder material, driven by the negative pressure airflow, passes through the powder collection device 110 and enters the gas-solid separation device. 120. In the gas-solid separation device 120, the powder material is separated from the airflow. The powder material separated by the gas-solid separation device 120 enters the powder storage device 400 through the discharge port 121 at the bottom of the gas-solid separation device 120. After the powder material at the suction port of the powder collection device 110 is unloaded, the support moving system 200 drives the powder collection device 110 to move to the other end of the carriage 310 at a predetermined speed or predetermined distance until all the powder material in the carriage 310 is unloaded into the powder storage device 400.

[0044] Compared with the prior art, the low-density powder material unloading device provided in this application embodiment uses negative pressure to extract the airflow and powder material into the gas-solid separation device 120 to unload the powder material from the high-sided truck 300. This can avoid the dust emission of the powder material during the unloading process, solve the problem of environmental pollution around the unloading, and is applicable to various powder materials, especially low-density, long-fiber materials. Since the material is transported by negative pressure airflow, it is not easy for the material to block the pipeline. Therefore, the requirements for fan power are not high, which can effectively improve the unloading speed and make the unloading process more stable, reduce unloading energy consumption, and reduce unloading costs. By adopting the above-mentioned low-density powder material unloading device, the high-sided truck 300 can be used to transport powder materials. Therefore, both the investment cost of the transport vehicle and the material transportation cost can be significantly reduced.

[0045] To improve the absorption efficiency, in one embodiment of this application, the powder collection device 110 includes a blowing sleeve 111, a suction sleeve 112, and a dust cover 113. The powder collection device 110 may include one or more sets of blowing sleeves 111, suction sleeves 112, and dust covers 113. Figure 3 The powder collection device 110 shown includes two sets of blowing sleeves 111, a suction sleeve 112, and a dust cover 113. The dust cover 113 adopts a variable diameter structure and is generally horn-shaped, with a large end and a small end at its two ends. The small end of the dust cover 113 is connected to the suction sleeve 112, and the large end of the dust cover 113 is the suction port. The suction port is located at the large end of the dust cover 113 to cover a larger area and generate negative pressure over a larger area, thereby preventing dust from escaping. The end of the suction sleeve 112 away from the dust cover 113 is the output port. The first end of the blowing sleeve 111 extends into the dust cover 113 and faces the same or approximately the same direction as the large end of the dust cover 113.

[0046] It should be noted that the purge sleeve 111 can be used as follows: Figure 1 and Figure 3 The material can be inserted through the suction sleeve 112 into the dust cover 113, or it can be inserted directly into the dust cover 113. The diameter of the blowing sleeve 111 is smaller than that of the suction sleeve 112, and the flow rate of the blowing air in the blowing sleeve 111 is also smaller than that of the negative pressure air in the suction sleeve 112. This is to achieve the blowing of the powder material in the carriage 310 without affecting the suction sleeve 112's suction of powder material through the negative pressure of the dust cover 113. This disturbs the powder material, making it easier for it to be carried into the dust cover 113 and the suction sleeve 112 by the negative pressure airflow in the dust cover 113.

[0047] One or more purge ports can be provided at the first end of the purge sleeve 111. The second end of the purge sleeve 111 is connected to the outlet of the conveying blower 130. The outlet of the conveying blower 130 inputs positive pressure airflow into the purge sleeve 111, and the positive pressure airflow flows out from the purge port at the first end of the purge sleeve 111. This application utilizes the negative pressure generated by the inlet of a conveying blower 130 to suck up powder material, and utilizes the positive pressure generated by the outlet of the same conveying blower 130 to purge the powder material in the carriage 310. This can effectively improve the unloading efficiency and avoid the cost increase caused by using multiple blowers. Of course, in other embodiments, two blowers can also be used to perform negative pressure suction and positive pressure purging respectively.

[0048] To further optimize the above technical solution, in one embodiment of this application, the position of the blowing sleeve 111 relative to the dust cover 113 is adjustable, so that the distance between the first end of the blowing sleeve 111 and the large end of the dust cover 113 along the direction perpendicular to the plane where the large end of the dust cover 113 is located is adjustable, so as to adjust the suction and unloading effect in a timely manner according to the amount of powder material in the carriage 310.

[0049] Preferably, a swirl vane 115 is provided inside the purging port at the second end of the purging sleeve 111. The swirl vane 115 can make the purging airflow output by the purging sleeve 111 spiral out, increase the purging area, and make the raised powder material diffuse to the surrounding area, so that it can be more easily absorbed by the negative pressure airflow around the second end of the purging sleeve 111, thereby improving the unloading efficiency.

[0050] It is foreseeable that as unloading proceeds, the distance between the powder collection device 110 and the powder material inside the carriage 310 will increase. Frequent adjustments to the position of the powder collection device 110 will increase control difficulty and make the operation of the low-density powder material unloading device cumbersome. Therefore, in one embodiment of this application, such as... Figure 1 As shown, the powder collection device 110 also includes a guide support device 114, which includes a support plate 1141 and a movable guide device 1142. The support plate 1141 is rotatably disposed on the dust cover 113, and the support plate 1141 can rotate relative to the dust cover 113 between a first position and a second position. The first position is a position where one side of the dust cover 113 is parallel to the plane where the large end of the dust cover 113 is located, and the second position is a position where the large end of the dust cover 113 is covered.

[0051] Movable guide devices 1142 are respectively provided on both sides of the support plate 1141. The movable guide devices 1142 are used to cooperate with the top of the side rails on both sides of the cargo box 310 of the high-sided truck 300 in the width direction. The movable guide devices 1142 are used to facilitate the reciprocating movement of the support plate 1141 along the length direction of the cargo box 310. During the reciprocating movement of the support plate 1141 along the length direction of the cargo box 310, the movable guide devices 1142 play a guiding and supporting role for the support plate 1141, reducing the friction between the support plate 1141 and the side rails on both sides of the cargo box 310.

[0052] To prevent the side of the support plate 1141 away from the dust cover 113 from tilting up when the dust cover 113 rotates relative to the support plate 1141, a counterweight can be set on the side of the support plate 1141 away from the dust cover 113. This will make the force on both sides of the support plate 1141 balanced, and the side of the support plate 1141 away from the dust cover 113 will not tilt up, thus affecting the movement of the powder collection device 110 along the length of the carriage 310.

[0053] It should be noted that if the powder collection device 110 has multiple suction ports, that is, if the powder collection device 110 is equipped with multiple dust covers 113, each dust cover 113 can be rotatably connected to the support plate 1141 at the same time, and the dust cover 113 can be supported by a support plate 1141 during the unloading process.

[0054] Furthermore, if the total width of the suction inlet of the powder collection device 110 is the same as or approximately the same as the inner width of the carriage 310, that is, the negative pressure airflow area of ​​the suction inlet can cover the inner width of the carriage 310, the dust cover 113 and the support plate 1141 can be only rotated together, and there is no other directional or manner of movement between them. If the total width of the suction inlet of the powder collection device 110 is different from the inner width of the carriage 310, that is, the negative pressure airflow area of ​​the suction inlet cannot cover the inner width of the carriage 310, the dust cover 113 and the support plate 1141 need to be rotated together while being relatively translated along the axis of rotation. That is, a translation drive device needs to be provided between the dust cover 113 and the support plate 1141 to drive the dust cover 113 to move relative to the support plate 1141 along the axis of rotation.

[0055] The translation drive device may include a rotary motor and a lead screw and slider mechanism. The lead screw of the lead screw and slider mechanism and the rotary motor are both mounted on the support plate 1141. The lead screw of the lead screw and slider mechanism is connected to the motor shaft of the rotary motor. The slider of the lead screw and slider mechanism is threadedly engaged with the lead screw. The dust cover 113 is rotatably connected to the slider. This allows the dust cover 113 to rotate relative to the support plate 1141 and to reciprocate relative to the support plate 1141 along the axis of rotation, thereby covering the inner width of the carriage 310.

[0056] Of course, the structure for achieving relative movement between the dust cover 113 and the support plate 1141 along the rotation axis is not limited to rotary motors and lead screw and slider mechanisms; other solutions can also be used, which are not limited here.

[0057] The dust cover 113 and the support plate 1141 are respectively connected to the support moving system 200. The support moving system 200 is used to drive the dust cover 113 and the support plate 1141 to move back and forth at least along the length of the cargo box 310 of the high-sided truck 300, and to drive the dust cover 113 and the support plate 1141 to rotate relative to each other.

[0058] By adding the aforementioned guide support device 114, when the high-sided truck 300 enters the unloading position, the powder collection device 110 is moved and arranged on the upper part of the truck body 310 of the high-sided truck 300 by the support moving system 200. The moving guide devices 1142 on both sides of the support plate 1141 are respectively engaged with the side rails on both sides of the truck body 310 in the width direction. At this time, the plane where the suction inlet of the powder collection device 110 is located is parallel to or approximately parallel to the bottom of the truck body 310, as is the case with the support plate 1141. Figure 1 The location shown.

[0059] Then, the conveying fan 130 is turned on. Under the action of the conveying fan 130, a negative pressure is formed between the dust cover 113 of the powder collection device 110 and the area inside the suction sleeve 112. Under the action of the negative pressure, the powder-laden airflow is conveyed to the gas-solid separation device 120 to achieve the separation of powder material and airflow. As the unloading process proceeds, when the powder material in the carriage 310 gradually decreases, the dust cover 113 is rotated downward relative to the support plate 1141 of the powder collection device 110 by the support moving system 200, that is, rotated into the carriage 310, to approach the powder material in the carriage 310, until the plane of the suction inlet of the powder collection device 110 is perpendicular to the support plate 1141. Figure 2 As shown, the supporting moving system 200 then drives the powder collection device 110 to move towards the remaining powder material pile, ultimately realizing the complete conveying of all powder materials inside the carriage 310 and completing the entire unloading process.

[0060] It is foreseeable that when the dust cover 113 rotates relative to the support plate 1141 until the plane of the suction inlet is perpendicular to the support plate 1141, the blowing sleeve 111 faces the front of the powder collection device 110 in the direction of movement and cannot blow the bottom of the carriage 310. Therefore, in one embodiment of this application, please refer to Figure 1 and Figure 3The powder collection device 110 also includes a purge pipe 116. At least one purge pipe 116 is provided on the side of the dust cover 113 away from the guide support device 114. Of course, in order to ensure that the entire bottom of the carriage 310 can be purged, multiple purge pipes 116 should be provided on the side of the dust cover 113 away from the guide support device 114 so that the purge range can cover the bottom of the carriage 310. The purge pipe 116 is connected to the fan outlet of the conveying fan 130.

[0061] Specifically, in one embodiment of this application, the purge pipe 116 includes a purge main pipe and purge branch pipes. The purge main pipe extends along the side of the dust cover 113 away from the guide support device 114. One end of the purge main pipe is connected to the first branch pipe 150, and multiple purge branch pipes are vertically connected to the purge main pipe.

[0062] When the dust cover 113 rotates relative to the support plate 1141 until the plane of the suction port is perpendicular to the support plate 1141, each blow pipe 116 is close to the bottom of the carriage 310, and the axis of the blow pipe 116 is parallel or substantially parallel to the bottom of the carriage 310, which can blow the bottom of the carriage 310, causing the residual powder material at the bottom of the carriage 310 to be lifted up so that it can be sucked in by the negative pressure airflow inside the dust cover 113.

[0063] It is not difficult to understand that, as Figure 1 As shown, the gas-solid separation device 120 only includes one cyclone separator. Therefore, the cyclone separator cannot separate all the dust in the airflow. After separation by the cyclone separator, some dust is still carried in the airflow. To avoid the emission of this dust and pollution of the unloading site environment, such as... Figure 1 As shown, the blower outlet of the conveying blower 130 is connected in parallel with a first branch pipe 150 and a second branch pipe 160. The first branch pipe 150 is connected to the purge pipe 116 and the purge sleeve 111 respectively. That is, the purge pipe 116 and the purge sleeve 111 are connected in parallel at the end of the first branch pipe 150 away from the blower outlet of the conveying blower 130. The second branch pipe 160 is connected to the dust removal device 180. The first branch pipe 150 and the second branch pipe 160 are respectively equipped with regulating valves 170. By adjusting the opening of the two regulating valves 170, the airflow in the first branch pipe 150 and the second branch pipe 160 can be adjusted, thereby realizing the control of the purge airflow.

[0064] During the unloading process, the dust-laden airflow, which has been initially separated by the cyclone separator, enters the first branch pipe 150 and the second branch pipe 160 respectively. The dust-laden airflow in the first branch pipe 150 is used as the purging airflow, and the dust-laden airflow in the second branch pipe 160 enters the dust removal device 180, thereby completely preventing dust leakage.

[0065] To further optimize the above technical solution, in one embodiment of this application, the outlet of the conveying fan 130 is connected to the first branch pipe 150 and the second branch pipe 160 through the material guiding device 190. The material guiding device 190 is used to separate the powder and the airflow, thereby further separating the powder and the airflow downstream of the cyclone separator.

[0066] Of course, a concentration separation device can be used instead of the feeding device 190, so that the powder-containing airflow is separated into a dense phase airflow with high powder concentration and a light phase airflow with low powder concentration. The light phase airflow with low powder concentration enters the first branch pipe 150 as a purging airflow, and the dense phase airflow with high powder concentration enters the second branch pipe 160 and finally enters the dust removal device 180.

[0067] Preferably, in one embodiment of this application, the moving guide device 1142 includes a plurality of rollers arranged in a straight line, the rotation axes of each roller are parallel, and the circumferential direction of the rollers is provided with limiting ring grooves for fitting with the top of the side rails on both sides of the cargo box 310 of the high-sided truck 300 in the width direction.

[0068] It should be noted that the above-mentioned mobile guide device 1142 is only a preferred embodiment provided by the present application, and is not actually limited to the above structure. For example, the mobile guide device 1142 can also be composed of a guide groove and rollers. The tops of the side rails on both sides of the width direction of the carriage 310 can be inserted into the guide groove, and rollers are provided at least on the top wall of the guide groove. The rollers roll in cooperation with the side rails on both sides of the width direction of the carriage 310.

[0069] Please see Figure 1 The support and movement system 200 includes a hoisting support device 210, a moving guide rail, and at least two sets of hoisting components. The hoisting components include a drive device, a hoisting device 220, and slings 230. The moving guide rail is disposed on the hoisting support device 210. The hoisting device 220 is disposed on the moving guide rail and can reciprocate along the moving guide rail. The drive device is used to drive the hoisting device 220 to reciprocate along the moving guide rail. The drive device and the hoisting device 220 can be an integral structure. The hoisting device 220 is disposed on the moving guide rail and can reciprocate along the moving guide rail via the drive device. Multiple hoisting devices 220 can be disposed on one drive device. Specifically, the drive device can be a trolley, and the hoisting device 220 can be an electric hoist.

[0070] The first end of the sling 230 is connected to the lifting device 220, which is used to raise and lower the sling 230. The second end of the sling 230 of at least one set of lifting components is connected to the support plate 1141, and the second end of the sling 230 of the remaining lifting components is connected to the dust cover 113 and / or the suction sleeve 112. When the drive device moves the lifting device 220 along the moving guide rail, the powder collection device 110 moves synchronously along the moving guide rail. When each lifting device 220 is raised and lowered synchronously... When the sling 230 is released, the powder collection device 110 moves up and down to adjust its position relative to the carriage 310. When the sling 230 connecting the dust cover 113 and / or the suction sleeve 112 is released, and the sling 230 connecting the support plate 1141 remains stationary, the dust cover 113 rotates downward relative to the support plate 1141. When the sling 230 connecting the support plate 1141 is released, the support plate 1141 also rotates downward until it blocks the suction port of the dust cover 113.

[0071] In summary, please refer to Figure 1 In application, after the high-sided truck 300 enters the designated unloading position, the powder collection device 110 is positioned above and behind the cargo box 310 of the high-sided truck 300 via the support and movement system 200. This application starts unloading from the rear of the cargo box 310 of the high-sided truck 300. Starting unloading from this position ensures that the powder collection device 110 is not easily interfered with by the front of the high-sided truck 300 throughout the unloading process, and also avoids collisions between the powder collection device 110 and the front of the truck. Of course, this can also be achieved by modifying the design of this application... The powder collection device 110 is adapted to allow unloading to begin from the side of the carriage 310 near the front of the vehicle. Then, the moving guide devices 1142 on both sides of the support plate 1141 are fixed to the railings on both sides of the carriage 310 of the high-sided truck 300. Since the powder material in the high-sided truck 300 is fully loaded at this time, the plane of the suction port of the dust cover 113 of the powder collection device 110 and the support plate 1141 are kept parallel to the bottom of the carriage 310.

[0072] After the powder collection device 110 is in place, the conveying fan 130 is turned on, and a negative pressure is generated in the dust cover 113 to suck up the powder material in the carriage 310. At the same time, the blowing sleeve 111 blows the material, causing the powder material to be lifted up, improving the unloading efficiency. The sucked-up powder material first enters the cyclone separator, where the powder material is initially separated. The remaining powder-containing airflow is pressurized by the conveying fan 130 and then passes through the material guiding device 190 to further separate the material from the conveying air. Part of the powder-containing airflow enters the dust removal device 180 directly through the second branch pipe 160, and the remaining powder-containing airflow enters the blowing sleeve 111 and the blowing pipe 116 through the first branch pipe 150. At the same time, the airflow entering the first branch pipe 150 and the second branch pipe 160 is adjusted by adjusting the regulating valves 170 on the first branch pipe 150 and the second branch pipe 160.

[0073] A portion of the powder-laden airflow entering the purge sleeve 111 forms a rotating airflow under the action of the swirl blades 115, blowing up the powder material. The blown-up powder material is then sucked into the cyclone separator under the negative pressure created in the internal area of ​​the dust cover 113 and the suction sleeve 112. The purge sleeve 111 and the suction sleeve 112 can be moved relative to each other according to the amount and properties of the powder material in the truck compartment 310, so as to adjust the suction and unloading effect in a timely manner.

[0074] The powder-laden airflow entering the purge pipe 116 is distributed to each purge branch pipe through the purge main pipe arranged on the dust cover 113, and purges the powder material behind the moving system 200 in the direction of movement, thereby reducing the residual powder material in the carriage 310 and improving the material unloading speed.

[0075] As the unloading and conveying process proceeds, and the material inside the carriage 310 gradually decreases, the support and movement system 200 releases the slings 230 connecting the dust cover 113 and / or the suction sleeve 112, causing the dust cover 113 and / or the suction sleeve 112 to rotate downward relative to the support plate 1141 around the pivot between the dust cover 113 and the support plate 1141, ultimately making the plane where the suction inlet of the dust cover 113 is located perpendicular or nearly perpendicular to the bottom of the carriage 310.

[0076] Subsequently, the supporting moving system 200 drives the powder collection device 110 to gradually move towards the front of the carriage 310, ultimately realizing the complete conveying of all powder materials inside the carriage 310 and completing the unloading process.

[0077] After unloading is completed, the support and moving system 200 retracts the hoisting cable 230 as a whole, so that the powder collection device 110 moves upward and away from the carriage 310. After the powder collection device 110 leaves the carriage 310, the hoisting cable 230 connecting the support plate 1141 is released, so that the support plate 1141 rotates around the pivot between the dust cover 113 and the support plate 1141, and finally achieves the sealing of the suction port of the dust cover 113 by the support plate 1141.

[0078] 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, eliminating dust emission during the unloading process and solving the problem of environmental pollution around the unloading area. Furthermore, it can complete one unloading process in 15-20 minutes. This increases the unloading speed from less than 10 t / h to 60 t / h or even higher, greatly improving operating efficiency. The combination of positive pressure purging and negative pressure suction makes the conveying pipeline 140 less prone to blockage, resulting in a more stable and reliable unloading process. After using this invention, sealed high-sided trucks 300 can be used for material transportation, significantly reducing both vehicle investment costs and material transportation costs.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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 negative pressure unloading device for low-density powder materials, used for unloading low-density powder materials from the cargo compartment (310) of a high-sided truck (300) to a powder storage device (400), characterized in that, The low-density powder material negative pressure unloading device includes: The negative pressure powder conveying system (100) includes a powder collection device (110), a gas-solid separation device (120), and a conveying fan (130). The powder collection device (110) has a connected inlet and outlet. The outlet of the powder collection device (110), the gas-solid separation device (120), and the conveying fan (130) are connected in series through a conveying pipeline (140). The conveying fan (130) is used to form a negative pressure airflow in the powder collection device (110) to draw powder from the cargo compartment (310) of the high-sided truck (300) from the inlet. The outlet (121) of the gas-solid separation device (120) is connected to the powder storage device (400). The gas-solid separation device (120) is used to separate the powder from the airflow and allow the separated powder to enter the powder storage device (400) from the outlet (121). A support and movement system (200) is connected to the powder collection device (110), and the support and movement system (200) is used to drive the powder collection device (110) to reciprocate at least along the length of the cargo box (310) of the high-sided truck (300); The powder collection device (110) includes a purge sleeve (111) and a dust cover (113). The large end of the dust cover (113) is the suction port. The first end of the purge sleeve (111) extends into the dust cover (113) and faces the same direction as the large end of the dust cover (113). The second end of the purge sleeve (111) is connected to the fan outlet of the conveying fan (130). The position of the purge sleeve (111) relative to the dust cover (113) is adjustable so that the distance between the first end of the purge sleeve (111) and the large end of the dust cover (113) is adjustable in a direction perpendicular to the plane where the large end of the dust cover (113) is located. A swirl vane (115) is provided inside the second end of the purge sleeve (111). The powder collection device (110) also includes a guide support device (114), which includes a movable guide device (1142) for cooperating with the top of the side rails on both sides of the cargo compartment (310) of the high-sided truck (300) in the width direction. The powder collection device (110) also includes a purge pipe (116); The blower outlet of the conveying fan (130) is connected in parallel with a first branch pipe (150) and a second branch pipe (160). The first branch pipe (150) is connected to the purge pipe (116) and the purge sleeve (111) respectively. The second branch pipe (160) is connected to the dust removal device (180). Adjusting valves (170) are respectively installed on the first branch pipe (150) and the second branch pipe (160). The outlet of the conveying fan (130) is connected to the first branch pipe (150) and the second branch pipe (160) through the material guiding device (190), and the material guiding device (190) is used to separate powder and airflow; The moving guide device (1142) includes a plurality of rollers arranged in a straight line, the rotation axes of each roller being parallel, and the rollers being provided with limiting ring grooves on their circumference for fitting the top of the side rails on both sides of the cargo compartment (310) of the high-sided truck (300) in the width direction.

2. The negative pressure unloading device for low-density powder materials according to claim 1, characterized in that, The powder collection device (110) includes a suction sleeve (112), the small end of the dust cover (113) is connected to the suction sleeve (112), and the end of the suction sleeve (112) away from the dust cover (113) is the output port.

3. The negative pressure unloading device for low-density powder materials according to claim 2, characterized in that, The guide support device (114) includes a support plate (1141), which is rotatably disposed on the dust cover (113). The support plate (1141) can rotate at least relative to the dust cover (113) between a first position and a second position. The first position is a position where one side of the dust cover (113) is parallel to the plane where the large end of the dust cover (113) is located. The second position is a position that covers the large end of the dust cover (113). The moving guide device (1142) is respectively provided on both sides of the support plate (1141). The dust cover (113) and the support plate (1141) are respectively connected to the support moving system (200). The support moving system (200) is used to drive the dust cover (113) and the support plate (1141) to reciprocate at least along the length of the cargo box (310) of the high-sided truck (300), and to drive the dust cover (113) and the support plate (1141) to rotate relative to each other.

4. The negative pressure unloading device for low-density powder materials according to claim 3, characterized in that, At least one purge pipe (116) is provided on the side of the dust cover (113) away from the guide support device (114), and the purge pipe (116) is connected to the fan outlet of the conveying fan (130).

5. The negative pressure unloading device for low-density powder materials according to claim 3, characterized in that, The support and movement system (200) includes a hoisting support device (210), a moving guide rail, and at least two sets of hoisting assemblies. The hoisting assembly includes a drive device, a hoisting device (220), and a sling (230). The moving guide rail is disposed on the hoisting support device (210). The hoisting device (220) is disposed on the moving guide rail and can reciprocate along the moving guide rail. The drive device is used to drive the hoisting device (220) to reciprocate along the moving guide rail. The first end of the sling (230) is connected to the hoisting device (220). The hoisting device (220) is used to retract and extend the sling (230). The second end of the sling (230) of at least one set of the hoisting assemblies is connected to the support plate (1141). The second end of the sling (230) of the remaining hoisting assemblies is connected to the dust cover (113) and / or the suction sleeve (112).

Images