Aggregate transporting, pre-wetting and feeding integrated device and feeding method

Abstract

The invention discloses an aggregate transporting, pre-wetting and feeding integrated device which comprises a transporting device and a feeding device. The conveying device comprises a traction device and a tank body, the tank body is installed on the traction device, and the traction device is used for pulling the tank body and part of the feeding device to move; the feeding device comprises a transportation part and a station part, the transportation part is mounted on the transportation device and comprises a sand pump, a water feeding pipeline and a discharging pipeline, the water feeding pipeline is communicated with the tank body, and the discharging pipeline is respectively communicated with the tank body and the sand pump; the station part comprises a feeding pipeline, a water filtering device, a water feeding device and a stock bin, the water feeding device is connected with the water feeding pipeline through a quick connector, the feeding pipeline is connected with the discharging pipeline through a quick connector, the feeding pipeline is communicated with the water filtering device, and the stock bin is used for storing filtered aggregate. Therefore, the effects of reducing environmental pollution, reducing production cost and simplifying production flow are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of building materials equipment, and particularly to an integrated device for transporting, pre-wetting and feeding aggregates. Background Art

[0002] As an important component of concrete, aggregates are widely used in construction projects. Due to their poor characteristics such as high density, transportation dust, and uneven moisture content, there is an urgent need for a process method that can reduce the number of transfers, effectively reduce transportation dust, and equalize the moisture content during application.

[0003] These requirements are concentrated in the transportation, pre-wetting, feeding and other links of the concrete production process.

[0004] Firstly, it is the transportation link. According to the requirements of concrete control, except in special cases, concrete needs to be centrally produced and processed at the mixing plant. This requires transporting the aggregates to the mixing plant or the construction site. The current common practice is to use self-unloading trucks for transportation and use a forklift to stack the materials after unloading. The upper opening of the self-unloading truck carriage is open. Generally, the method to prevent dust is to install a cover plate or spray water for dust reduction. The cover plate can only relatively reduce the dust of the aggregates and cannot eliminate the dust. Spraying water is not easy to control in operation. If the amount of sprayed water is small or the transportation distance of the goods is far, dust will still be generated. If the amount of sprayed water is large, it will cause water dripping and pollution of the road surface during transportation. In addition, stacking with a forklift will mix different varieties of aggregates or the sludge on the ground together, thus affecting the quality of concrete.

[0005] Secondly, it is the pre-wetting link. In order to accurately control the water consumption of concrete and remove the dust and impurities on the surface of the aggregates, the existing method is to wash the aggregates with a large amount of water before use. The effect is that the moisture content at the bottom of the material pile is relatively large, and the dust and impurities also remain at the bottom of the material pile, and the purpose of completely removing dust and impurities and equalizing the moisture content is not achieved.

[0006] Finally, it is the feeding link. Existing mixing plants generally store aggregates in a ground yard. Advanced mixing plants are equipped with high-level silos. However, no matter which method is used, the aggregates need to be transferred twice after reaching the mixing plant, and the equipment and yard occupy a relatively large area.

[0007] The above analysis shows that the modern concrete mixing industry is in urgent need of an advanced technology that can ensure the quality of concrete, reduce environmental pollution, reduce production costs, and simplify the production process. Truly achieve an integrated solution. Summary of the Invention

[0008] The purpose of the present invention is to provide an integrated device for transporting, pre-wetting and feeding aggregates, which has the effects of ensuring the quality of concrete, reducing environmental pollution, reducing production costs, and simplifying the production process.

[0009] In order to achieve the above purpose, the present invention adopts the following technical solutions to be realized:

[0010] An integrated device for transporting and pre-wetting and feeding aggregate, comprising a transporting device and a feeding device;

[0011] The transporting device includes a traction device and a tank body, the tank body is installed on the traction device, and the traction device is used to traction the tank body and part of the feeding device to move;

[0012] The feeding device includes a transporting part and a yard part, the transporting part is installed on the transporting device, the transporting part includes a sand pump, a water supply pipe and a discharging pipe, the water supply pipe is communicated with the tank body, the discharging pipe is communicated with the tank body, and the sand pump is arranged on the discharging pipe;

[0013] The yard part includes a feeding pipe, a water filtering device, a water supply device and a silo, the water supply device is connected with the water supply pipe through a quick joint, the feeding pipe is connected with the discharging pipe through a quick joint, the feeding pipe is communicated with the water filtering device, and the silo is used for storing the filtered aggregate.

[0014] Through the above technical solution, a large amount of dust can be prevented from being generated during the loading and unloading of aggregate, polluting the environment. At the same time, the pre-wetting of the aggregate is completed during the discharging process, that is, the water flow is used to drive the aggregate transportation, and the impact force when the water flows is used to wash the aggregate. The water also penetrates into the aggregate during the pipeline transportation process, which well meets the requirement that the aggregate needs to be pre-wetted in advance, and this technology achieves multiple functions with one stroke.

[0015] Preferably, the lower part of the tank body is conical, and the discharging pipe is arranged at the lowest point of the conical part at the lower part of the tank body.

[0016] Through the above technical solution, it is convenient to take out the aggregate in the tank body by the water flow.

[0017] Preferably, a feeding port is arranged at the top of the tank body, and the feeding port is provided with a sealing cover.

[0018] Through the above technical solution, the generation of dust during transportation is reduced, thus polluting the environment.

[0019] Preferably, a water distribution valve is arranged on the water supply pipe, and after passing through the water distribution pipe, the water supply pipe is divided into two paths, one path is communicated with the tank body, and the other path is communicated with the discharging pipe between the tank body and the sand pump.

[0020] Through the above technical solution, the water pipe communicated with the tank body is used to flush the aggregate in the tank body out of the tank body, and the water pipe communicated with the discharging pipe is used to increase the fluidity of the aggregate in the discharging pipe.

[0021] Preferably, the water filtering device includes a box body, a cloth pipe, a screen and a water collecting box. The screen is inclined in the box body. The cloth pipe is installed at the upper end of the screen. A baffle is provided at the lower end of the screen. The cloth pipe is communicated with the feeding pipeline. The water collecting box is arranged at the bottom of the box body and is communicated with the water supply device.

[0022] Through the above technical solution, the wetted aggregate is separated from water, which is convenient for the recycling of water.

[0023] Preferably, the water supply device includes a water tank, which is connected to the water source of the station yard. A drainage pipeline is arranged on the water tank, and the drainage pipeline is connected to the water supply pipeline through a quick connector.

[0024] Through the above technical solution, a buffering effect can be achieved on the water source, that is, a large amount of water is drained when water is needed to accelerate the unloading of the aggregate from the tank body, and the water source can continuously discharge water usually to store a large amount of water in the water tank.

[0025] Preferably, a valve is arranged on the drainage pipeline.

[0026] Through the above technical solution, the valve can adjust the flow rate of water in the drainage pipeline and play an isolation role at the same time, ensuring the docking and disconnection of the quick connector in a state where there is no water in the pipeline.

[0027] Preferably, the water collecting box is communicated with a vertical return water pipeline, and a cyclone is installed on the vertical return water pipeline. The upper water outlet of the cyclone is communicated with the water tank.

[0028] Through the above technical solution, impurities in the return water can be separated by the cyclone, the clear water is sent to the water tank for repeated use, and the water with impurities is sent to the sedimentation tank for sedimentation and purification.

[0029] Preferably, a sewage discharge valve is arranged on the feeding pipeline, and the sewage discharge valve is used to discharge the sewage on the feeding pipeline.

[0030] Through the above technical solution, after the discharging is completed, the water in the feeding pipeline and the discharging pipeline is discharged through the sewage discharge valve, so that the quick connector between the feeding pipeline and the discharging pipeline can be docked and separated in a state without water.

[0031] A feeding method for an integrated device for transporting and pre-wetting aggregates for feeding is characterized by including the following steps:

[0032] S1 The transport device drags the tank body to the aggregate production plant, opens the feeding port above the tank body, and the aggregate is loaded into the tank body from here, and the loading is completed;

[0033] S2 The transport device drags the tank body filled with aggregates to the discharging location, connects the water supply device and the water supply pipeline through a quick connector, and connects the feeding pipeline and the discharging pipeline through a quick connector;

[0034] S3 Open the drain pipe to let clean water flow into the tank body. At the same time, open the water distribution valve to fill the pipes at the bottom of the vehicle with clean water. After waiting for a few minutes, start the sand pump. A small amount of aggregate and a large amount of water start to enter the water filtering device through the discharge pipe. Gradually close the water distribution valve until it is completely closed. At this time, the aggregate content in the discharge pipe is close to the proportion of dry matter in the sand pump performance, and then start normal unloading;

[0035] S4 The mixture of aggregate and water enters the water filtering device and first enters the cloth pipe. Due to the constraint of the shape of the cloth pipe, the mixture forms a swirling dispersion and uniformly passes through the bottom outlet under the action of gravity. Under the water filtering function of the screen, the aggregate rolls downwards on the screen. After the stacking height exceeds the height of the baffle plate, it automatically slides downwards and enters the storage bin. The water and the dust impurities on the surface of the aggregate pass through the screen and fall into the bottom water collecting box.

[0036] S5 The water in the water collecting box naturally flows into the cyclone through the vertical return pipe installed at the bottom of the box. The dust impurities mixed in the water are discharged at the bottom of the cyclone, and the clean water is discharged from the upper part of the cyclone and flows into the water tank for recycling;

[0037] S6 After all the aggregate in the tank body and the discharge pipeline is discharged, first close the manual valve and then open the sewage discharge valve. After observing that there is no water flowing out of the sewage discharge valve, the sand pump can be stopped. After disconnecting all the quick connectors connecting the vehicle-mounted part and the station part, the vehicle can leave the site.

[0038] Compared with the prior art, the present invention has the following technical effects:

[0039] Make full use of the existing conditions of the mixing plant and the aggregate production plant, and cleverly combine and match equipment such as tank trucks and sand pumps to achieve multiple functions with one machine.

[0040] During the unloading process, the pre-wetting of the aggregate is completed. That is, the fluidity of water is used to drive the transportation of the aggregate, and the impact force during the water flow is used to achieve the effect of washing the aggregate. The water also penetrates into the aggregate during the pipeline transportation process. This well meets the requirement that the aggregate needs to be pre-wetted in advance, and this technology achieves multiple benefits with one action.

[0041] Reduce the links such as opening and closing the anti-dust cover during aggregate loading and secondary transfer during unloading, and effectively improve the production efficiency;

[0042] Fundamentally eliminate the dust during the transportation and transfer of aggregate, effectively reduce the pollution of the water used for pre-wetting the aggregate, and greatly reduce the environmental pollution and damage during the production process of mixing concrete;

[0043] This device ensures that the aggregate is not transferred to avoid pollution and confusion, and the pre-wetting is uniform, which is the greatest guarantee for the quality of concrete. Description of the Drawings

[0044] Figure 1: Schematic structural diagram of the present invention;

[0045] Tank body 1, discharge port 11, sealing cover 12, tractor head 2, tanker 21, traction mechanism 22, gearbox 23, sand pump 3, upper pulley 31, lower pulley 32, belt 33, upper water pipeline 4, water cathode quick connector 41, water distribution valve 42, discharge pipeline 5, discharge cathode quick connector 51, feeding pipeline 6, discharge anode quick connector 61, vertical feeding pipeline 62, sewage discharge valve 63, water filtration device 7, box body 71, cloth pipe 72, screen 73, water collecting box 74, water supply device 8, water tank 81, vertical return water pipeline 82, cyclone 83, drainage pipeline 84, water replenishing pipeline 85, water anode quick connector 86, float valve 87, storage bin 9. Specific implementation manner

[0046] The following further elaborates on the specific content of the present invention in conjunction with embodiments, but it is not a limitation to the present invention.

[0047] The present invention provides an integrated device for pre-wetting and feeding of aggregate transportation, which includes a transportation device and a feeding device. The transportation device includes a traction device and a tank body 1. The traction device includes a tractor head 2 and a tanker 21. The tractor head 2 is connected to the tanker 21 through a vehicle-mounted traction mechanism 22 and can be separated and connected according to requirements. The tank body 1 is installed on the tanker 21.

[0048] The feeding device includes a transportation part and a yard part. The transportation part is installed on the transportation device. The transportation part moves with the transportation device, and the yard part is fixed. The two parts are connected through quick connectors. The transportation part includes a sand pump 3, an upper water pipeline 4, and a discharge pipeline 5. The upper water pipeline 4 is communicated with the tank body 1, and the discharge pipeline 5 is communicated with the tank body 1 and the sand pump 3 respectively.

[0049] The sand pump 3 is fixedly installed on the tractor head 2 and is connected to the tractor head 5 through the upper pulley 31, the lower pulley 32, and the belt 33. The upper pulley 31 is installed on the main shaft of the sand pump 3 through a key connection, and the lower pulley 32 is installed on the gearbox 23 of the tractor head 2. When the gearbox 23 of the tractor head 2 works, it drives the lower pulley 32 to rotate, and then drives the upper pulley 31 to rotate through the belt. The sand pump 3 rotates together with the upper pulley 31, and the rotational speed of the tractor head 2 can be matched with the rotational speed of the sand pump 3 by equipping pulleys with different speed ratios. The selection of the sand pump 3 can be based on the characteristics of the transported material to select the diameter, based on the discharging requirements to select the lift, and based on the discharging efficiency to select the flow rate.

[0050] A tank body 1 is installed on the tanker 21. The bottom of the tank body 1 is shaped with higher ends and a lower middle part, and a discharge port 11 is provided at the lowest point. The tank body 1 is in a fully enclosed form, and 2 - 3 feeding ports are provided at the upper end of the tank body 1. The feeding ports are provided with sealing covers 12. Aggregates are put into the tank body 1 through the feeding ports. After loading, the sealing covers 12 are covered to prevent dust from rising during transportation. The size of the tank body can be designed according to the amount of transported materials, and the bottom slope angle is close to the angle of repose of the materials.

[0051] The water supply pipeline 4 is installed on the tank body 1. The water supply pipeline 4 has a T-shaped structure. One end of the horizontal part of the T is provided with a water cathode quick connector 41, which is quickly connected to and disassembled from the water supply device at the station; the other end of the horizontal part of the T extends into the interior of the tank body 1, and a water distribution valve 42 is installed at the vertical part of the T and extends downward to connect to the discharge port of the tank body and communicate with the discharge pipeline 5. The caliber of the water supply pipeline 4 is selected according to the water consumption for material transportation. A hose is used from the water cathode quick connector 41 to the vertical and horizontal bifurcation of the T for convenient bending and connection to the water supply device at the station.

[0052] The discharge pipeline 5 consists of two sections of pipelines, one connecting the discharge port of the tank body 1 to the inlet of the sand pump 3 and the other connecting the discharge port of the sand pump 3 to the discharge cathode quick connector 51. Both are made of hose material, and at least one section is made of transparent material to facilitate observing the material flow in the pipeline and assist in judging whether the materials in the tank body are emptied. The discharge cathode quick connector 51 is connected to the station part.

[0053] The station part is further divided into a feeding pipeline 6, a water filtration device 7, a water supply device 8, and a storage bin 9.

[0054] The feeding pipeline 6 includes a discharge anode quick connector 61 connected to the discharge cathode quick connector 51 of the transportation part, a vertical feeding pipeline 62, a sewage discharge valve 63, etc. The feeding pipeline 6 is responsible for transporting the aggregates and water of the vehicle-mounted part to the water filtration device. The caliber is the same as that of the discharge pipeline 5 of the vehicle-mounted part. The sewage discharge valve 63 is located at the lower end of the vertical feeding pipeline 62, close to the discharge anode quick connector 61.

[0055] The water filtration device consists of a box body 71, a cloth pipe 72, a screen 73, and a water collection box 74. The screen 73 is arranged obliquely, and the inclination angle is determined according to the material characteristics. A cloth pipe 72 is installed at its upper end, and a baffle 75 is provided at the lower end to prevent water from flowing into the storage bin 9. The cloth pipe 72 is in a circular tube shape, and its length is equivalent to the width of the screen 73. A feeding port is provided at the middle horizontal position of the length of the cloth pipe 72, and the feeding port is connected to the vertical feeding pipeline 62 of the feeding pipeline. After the materials enter the cloth pipe 72, they are dispersed and discharged from the outlet below the cloth pipe 72. The materials and water flow downward on the screen 73, and the water leaks through the screen 73 into the water collection box 74, and the materials fall into the storage bin 9 from the bottom end of the screen 73.

[0056] The water supply device 8 is composed of a water tank 81, a vertical return water pipe 82 connected to the water tank 81, a hydrocyclone 83, a drain pipe 84, a water replenishing pipe 85, etc. The water tank 81 is installed at a position slightly higher than the vehicle tire. The vertical return water pipe 82 connects the water tank 81 and the water collecting box 74 of the water filtering device, and its diameter is larger than that of the feeding pipe. A hydrocyclone 83 is connected to the bottom of the vertical return water pipe 82, and the hydrocyclone 83 can separate impurities in the return water. The drain pipe 84 is located at the bottom of the water tank 81, and a water anode quick connector 86 connected to the water cathode quick connector 41 of the vehicle-mounted part is provided at the end of the drain pipe 84. A manual valve 86 is provided on the drain pipe 84 to control the water flow. The water replenishing pipe 85 is connected to the station water source above the water tank 81, and a float valve 87 for automatically controlling the water level is provided on the water tank 81.

[0057] A feeding method for an integrated device of aggregate transportation and pre-wetting and feeding includes the following steps:

[0058] S1 The vehicle-mounted part of the device is towed by the tractor head to the aggregate production plant. The feeding port above the tank body is opened, and the aggregate is loaded into the tank body from here. When the load capacity is reached, the feeding is stopped, and the feeding port is closed to complete the feeding.

[0059] S2 The vehicle-mounted part filled with aggregate is towed by the tractor head to the unloading location and parked at the designated position. The vehicle is put in neutral and the handbrake is tightened.

[0060] Connect the water cathode quick connector of the vehicle-mounted part with the water anode quick connector of the station part. Then connect the discharge cathode quick connector of the vehicle-mounted part with the feeding anode quick connector of the station part.

[0061] S3 Open the manual valve of the drain pipe to allow clear water to flow into the tank body. At the same time, open the water distribution valve to fill the bottom pipe of the vehicle with clear water.

[0062] After waiting for a few minutes, start the sand pump. A small amount of aggregate and a large amount of water start to enter the water filtering device through the discharge pipe. Gradually close the water distribution valve until it is completely closed. At this time, the aggregate content in the discharge pipe is close to the proportion of dry matter in the sand pump performance, and normal unloading begins.

[0063] The mixture of aggregate and water enters the water filtering device and first enters the cloth pipe. Due to the constraint of the shape of the cloth pipe, the mixture forms a swirling dispersion and uniformly passes through the bottom outlet under the action of gravity. Since the bottom outlet is as wide as the screen and is installed at the top of the screen, the mixture flowing out of the cloth pipe will be uniformly dispersed along the width direction of the screen. Under the water filtering function of the screen, the aggregate rolls down on the screen, and the water and the dust impurities on the surface of the aggregate pass through the screen and fall into the bottom water collecting box. To prevent the water from flowing downward along the screen, a baffle is provided at the low end of the screen. Here, the aggregate accumulates slightly. After the accumulation height exceeds the height of the baffle, it automatically slides downward and enters the storage bin.

[0064] The water in the S5 water collection box naturally flows into the hydrocyclone through the vertical return pipe installed at the bottom of the box. Here, the dust and impurities mixed in the water are discharged from the bottom of the hydrocyclone, and the clear water is discharged from the upper part of the hydrocyclone and flows into the water tank for recycling.

[0065] The float valve of the water tank controls the water level and replenishes water at any time to ensure the water level height in the water tank.

[0066] After all the aggregate in the S6 tank body and discharge pipeline is discharged, first close the manual valve and then open the sewage valve. After observing that there is no water flowing out of the sewage valve, the sand pump can be stopped.

[0067] After disconnecting all the quick connectors connecting the vehicle-mounted part and the station part, the vehicle can leave the site.

[0068] The technical problems that the present invention can solve:

[0069] This device can solve many problems urgently needed to be solved in concrete mixing plants and construction sites, such as dust in the process of aggregate transportation, pre-wetting, feeding, poor pre-wetting effect, feeding pollution, large land occupation, high cost, etc.

[0070] This device solves the problem of dust in the process of aggregate transportation. Because it uses a closed tank for transportation, dust is fundamentally eliminated.

[0071] This device uses the technology of closed tank transportation and pipeline transportation, effectively preventing foreign objects from floating into the aggregate during transportation, effectively preventing different aggregates from being confused, and avoiding aggregate pollution.

[0072] This device realizes the non-ground transfer of aggregate, greatly reducing the working intensity of the mixing plant.

[0073] This device can effectively reduce the land occupation area of the mixing plant and the investment in transfer equipment.

[0074] While transporting, this device pre-wets the aggregate well, ensuring the uniform consistency of the water content of the aggregate.

[0075] The ingenious design of the water circuit of this device enables the recycling of water, saving water and reducing water pollution at the same time.

Claims

1. An integrated device for transporting and pre-wetting aggregate for feeding, characterized in that, It includes a transportation device and a feeding device; The transportation device includes a traction device and a tank body, the tank body is installed on the traction device, and the traction device is used to tow the tank body and part of the feeding device to move; The feeding device includes a transportation part and a yard part. The transportation part is installed on the transportation device. The transportation part includes a sand pump, a water supply pipe and a discharge pipe. The water supply pipe is communicated with the tank body, the discharge pipe is communicated with the tank body, and the sand pump is arranged on the discharge pipe; The yard part includes a feeding pipe, a water filtering device, a water supply device and a storage bin. The water supply device is connected with the water supply pipe through a quick connector. The feeding pipe is connected with the discharge pipe through a quick connector. The feeding pipe is communicated with the water filtering device. The storage bin is used to store the filtered aggregate.

2. The integrated device for transporting and pre-wetting and feeding aggregate according to claim 1, wherein, The lower part of the tank body is conical, and the discharge pipe is arranged at the lowest point of the lower conical part of the tank body.

3. The integrated device for transporting and pre-wetting and feeding aggregate according to claim 1, wherein There is a feed inlet at the top of the tank body, and the feed inlet is provided with a sealing cover.

4. The integrated device for transporting and pre-wetting and feeding aggregate according to claim 2, wherein, A water distribution valve is arranged on the water supply pipe. After the water supply pipe passes through the water distribution pipe, it is divided into two paths. One path is communicated with the tank body, and the other path is communicated with the discharge pipe between the tank body and the sand pump.

5. The integrated device for transporting and pre-wetting and feeding aggregates according to claim 1, wherein, The water filtering device includes a box body, a cloth pipe, a screen and a water collecting box. The screen is inclined in the box body. The cloth pipe is installed at the upper end of the screen. A baffle is arranged at the lower end of the screen. The cloth pipe is communicated with the feeding pipe. The water collecting box is arranged at the bottom of the box body, and the water collecting box is communicated with the water supply device.

6. The integrated device for transporting and pre-wetting and feeding aggregate according to claim 5, wherein The water supply device includes a water tank. The water tank is connected with the yard water source. A drain pipe is arranged on the water tank. The drain pipe is connected with the water supply pipe through a quick connector.

7. The integrated device for transporting and pre-wetting and feeding aggregates according to claim 6, wherein, A valve is arranged on the drain pipe.

8. The integrated device for transporting and pre-wetting and feeding aggregate according to claim 6, characterized in that, The water collecting box is communicated with a vertical return water pipe. A cyclone is installed on the vertical return water pipe. The upper water outlet of the cyclone is communicated with the water tank.

9. The integrated device for transporting and pre-wetting and feeding aggregates according to claim 8, wherein, A sewage discharge valve is arranged on the feeding pipe. The sewage discharge valve is used to discharge the sewage on the feeding pipe.

10. The feeding method of an integrated device for transporting and pre-wetting aggregates for feeding according to any one of claims 1-9, characterized in that, It includes the following steps: S1: The transportation device drags the tank body to the aggregate production plant, opens the feed inlet above the tank body, and the aggregate is loaded into the tank body from here, and the loading is completed; S2: The transportation device drags the tank body filled with aggregate to the unloading location, connects the water supply device and the water supply pipe through a quick connector, and connects the feeding pipe and the discharge pipe through a quick connector; S3: Open the drain pipe to make clear water flow into the tank body. At the same time, open the water distribution valve to make the clear water fill the bottom pipeline of the vehicle. After waiting for a few minutes, start the sand pump. A small amount of aggregate and a large amount of water start to enter the water filtering device through the discharge pipe. Gradually close the water distribution valve until it is completely closed. At this time, the aggregate content in the discharge pipe is close to the dry matter ratio in the sand pump performance, and start normal unloading; S4: The mixture of aggregate and water enters the water filtering device and first enters the cloth pipe. Due to the constraint of the shape of the cloth pipe, the mixture forms a swirling dispersion and uniformly passes through the bottom outlet under the action of gravity. Under the water filtering function of the screen, the aggregate rolls down on the screen. When the accumulated height exceeds the height of the baffle, it automatically slides down and enters the storage bin. The water and the dust impurities on the surface of the aggregate pass through the screen and fall into the bottom water collecting box; The water in the S5 water collecting box naturally flows into the hydrocyclone through the vertical return pipe installed at the bottom of the box. The dust and impurities mixed in the water are discharged at the bottom of the hydrocyclone, and the clear water is discharged from the upper part of the hydrocyclone and flows into the water tank for recycling. After all the aggregates in the S6 tank body and the discharge pipeline are discharged, first close the manual valve and then open the sewage discharge valve. After observing that there is no water flowing out of the sewage discharge valve, the sand pump can be stopped. After disconnecting all the quick connectors connecting the vehicle-mounted part and the station part, the vehicle can leave the site.

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