Cleaning method for discharge hopper of mixing plant

Abstract

The invention belongs to the technical field of mixing plant main machine cleaning methods, and particularly relates to a cleaning method for a mixing plant discharge hopper. The method is characterized by comprising the steps of 1, storing air in an air storage tank, starting an air compressor to inflate the air storage tank, 2, injecting water into an air pressure water tank, closing an air pressure water tank air supply pneumatic ball valve during water injection, closing an air pressure water tank drainage pneumatic ball valve, opening an air pressure water tank exhaust pneumatic ball valve, and exhausting air pressure in the air pressure water tank. 3, cleaning is conducted, specifically, an air pressure water tank drainage pneumatic ball valve and a cleaning airflow supply pneumatic ball valve are opened at the same time when cleaning is conducted, mixed airflow of airflow and clean water passes through an air pipe and a cleaning spray head, and the air pressure in the air pressure water tank is discharged; the cement is sprayed to the position, where the cement remains, of the inner side of the discharging hopper, the cement is cleaned away, and the discharging hopper does not cake after being cleaned up every time. The impact force of gas and the cleaning force of water are mixed together, and the effect that concrete residues in the discharge hopper at the bottom of the main machine of the mixing plant can be automatically cleaned without much water can be achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of cleaning methods for a mixing station mainframe, and in particular relates to a cleaning method for a discharging hopper of a mixing station. Background Art

[0002] The unloading hopper at the bottom of the main unit of the mixing station is used for mixing concrete. Each batch of concrete passes through or is temporarily stored in the unloading hopper, and some cement will remain in the unloading hopper. If the unloading hopper does not store concrete temporarily, the main unit will open the door to unload the concrete, and it will directly pass through the unloading hopper, which is better, and there will be no cement residue in the unloading hopper. However, most of the current mixing stations have changed this unloading hopper into a temporary storage hopper, which is used to temporarily store a batch of concrete in the temporary storage hopper before the tank truck is unloaded, which can improve the production efficiency of the mixer. The concrete residues in each batch of concrete that passes through or is temporarily stored in the unloading hopper or temporary storage hopper are currently cleaned by all mixing stations by occasionally using a high-pressure cleaning water gun before the residues are completely dry. It is impossible to call people to clean every batch of materials with manual high-pressure cleaning. These residues can be cleaned when the concrete is not dry yet, but after the concrete is dry, there is no way to clean it cleanly. Then, they have to wait for the unloading hopper or temporary storage hopper to accumulate more and more, and when it affects the unloading, or there is no way to temporarily store a batch of materials, or the machine can be shut down, manpower is called to use an electric hammer or an air shovel to clean up these concrete residues.

[0003] If you use a high-pressure cleaning pump for cleaning, in addition to the fact that it is not suitable to clean every time manually, the high-pressure cleaning pump is not suitable even if it is automatic. Because after each pot of concrete is poured by the high-pressure cleaning, the high-pressure cleaning pump will be turned on after the main door is closed. The high-pressure cleaning pump takes a long time to clean, and it will require a lot of clean water. The tank truck is not filled with one pot of concrete. Generally, each tank truck requires several pots of concrete to be filled. The clean water used by the high-pressure water pump to clean the unloading hopper is mixed with the concrete, which may affect the quality of the concrete. Therefore, no mixing station has adopted this kind of automatic cleaning with a high-pressure cleaning pump, but many people may have thought about this technology.

[0004] The applicant also got some conclusions from the use of high-pressure cleaning pumps for cleaning. When draining the air tank of the air compressor, it was found that there was a lot of water in the tank. The water that was drained was all water. When the water in the air tank was almost drained, the water that was released began to vaporize. Later, I connected the bottoms of the two air tanks together to drain the water, and found that it was rare that all the water was drained. Two air tanks have the same air pressure, one has water and air pressure, and the other has no water but only air pressure. They are connected to the same pipeline and drained from the same outlet. Generally, the water discharged is atomized water, and it is difficult or impossible to discharge only water. So I thought, if we have two tanks, one with only gas and the other with both gas and water, then wouldn't the water mist that is sprayed out also be able to replace the high-pressure cleaning pump to clean the discharge hopper? Moreover, the air pressure can be maintained at that level all the time, and the water output can be controlled by a manual ball valve, so a small amount of water can be controlled, and there is still a high pressure to clean the discharge hopper. A small amount of water, after cleaning the discharge hopper, is mixed with the concrete in the tank truck, which will not affect the concrete, or have little effect. Moreover, the concrete remaining in the discharge hopper may be more viscous than the concrete in the tank truck, and it also needs to be mixed with some clean water and then mixed with the concrete in the tank truck to make it as thick as the concrete in the tank truck.

[0005] The applicant has also thought that air pressure alone cannot blow away the concrete residue in the discharge port, so a mixed airflow of air flow and clean water should be used to clean the concrete residue in the discharge hopper. Summary of the invention

[0006] (1) Technical issues to be resolved The technical problem to be solved by the present invention is to provide a method for cleaning the unloading hopper of a mixing station.

[0007] (2) Technical solution A method for cleaning a discharging hopper of a mixing station, characterized in that it includes the following steps: step 1, storing air in an air tank, starting an air compressor 1 to inflate the air tank 2, step 2, filling a pressure water tank with water, during which the pressure water tank air supply pneumatic ball valve 7 and the pressure water tank drainage pneumatic ball valve 10 are closed, and the pressure water tank exhaust pneumatic ball valve 8 is opened to discharge the air pressure inside the pressure water tank 3. After the air pressure inside the pressure water tank 3 is discharged, the pressure water tank water supply pneumatic ball valve 9 is opened, and clean water enters the pressure water tank 3 from the water tank 4, and step 3, cleaning. During cleaning, the pressure water tank drainage pneumatic ball valve 10 and the cleaning air supply pneumatic ball valve 11 are opened at the same time, and a mixed airflow of air and clean water passes through the air pipe 6 and the cleaning nozzle 13 to spray to the position where cement remains on the inner side of the discharging hopper 5 to clean out the cement. Each time the cleaning is done, the discharging hopper 5 will not clump.

[0008] The manual ball valve 12 is used to control the water output. The water output can be completely atomized when spraying out the cleaning nozzle 13, or the water in the mixed air flow each time can be controlled to clean the concrete residue most efficiently, while keeping the use of a small amount of clean water as small as possible, which will not affect the consistency of the concrete, or will not affect the consistency of the concrete as much as possible.

[0009] The air pipe 6 described should be a pipe of 50mm to 75mm, or the water pipe can be appropriately enlarged according to the needs of the nozzle.

[0010] The pressure water tank 3 should be made smaller. It is best to keep the amount of clean water injected each time equal to the amount of clean water required for each cleaning. The smaller the pressure water tank 3 is, the less gas pressure is required to be discharged during each water injection, and the faster the exhaust speed will be.

[0011] When the pneumatic ball valve 8 for exhausting the pressure water tank 3 is opened, or the pneumatic ball valve 9 for adding water to the pressure water tank is opened, the pneumatic ball valve 10 for draining the pressure water tank and the pneumatic ball valve 11 for supplying the cleaning air flow cannot be opened.

[0012] The interior of the water tank 4 described above may be appropriately mixed with some oily materials or other substances that can reduce the adhesion of concrete to the discharge hopper without affecting the quality of the concrete.

[0013] (3) Beneficial effects The present invention adopts the impact force of air and the cleaning force of water, and mixes them together. It is also convenient to properly mix some oily materials or materials that can reduce the adhesion of concrete on the discharge hopper into the water, so that the concrete residue in the discharge hopper can be better cleaned, and it can also automatically clean the concrete residue in the discharge hopper at the bottom of the main machine of the mixing station without using a lot of water, so as to achieve the effect of cleaning the concrete lumps in the discharge hopper of the mixing station without manpower using impact drills or gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a flow chart of the present invention.

[0015] Figure 2 It is an assembly diagram of the present invention.

[0016] Figure 3 It is a pipeline structure diagram of the present invention.

[0017] The markings in the attached figure are: 1-air compressor, 2-air storage tank, 3-air pressure water tank, 4-water tank, 5-discharging hopper, 6-air pipe, 7-air supply pneumatic ball valve for pressure water tank, 8-air exhaust pneumatic ball valve for pressure water tank, 9-air filling pneumatic ball valve for pressure water tank, 10-air drainage pneumatic ball valve for pressure water tank, 11-air supply pneumatic ball valve for cleaning air flow, 12-manual ball valve, 13-cleaning nozzle. Example 1

[0018] A method for cleaning a discharging hopper of a mixing station, characterized in that it comprises: Figure 1-Figure 3 The described parts include an air compressor 1, an air storage tank 2, a pressure water tank 3, a water tank 4, a discharge hopper 5, an air pipe 6, a pressure water tank air supply pneumatic ball valve 7, a pressure water tank exhaust pneumatic ball valve 8, a pressure water tank water addition pneumatic ball valve 9, a pressure water tank drainage pneumatic ball valve 10, a cleaning air supply pneumatic ball valve 11, a manual ball valve 12, and a cleaning nozzle 13.

[0019] During use and cleaning, if the discharge hopper is not equipped with a temporary storage device, the manual ball valve 12 is used to control the water output, and the water output is controlled to be at a suitable position where it can be completely atomized when spraying the cleaning nozzle 13. The control system enters the mixing station production line system. The production line mixing host completes a pot of material each time, and the mixing host door is opened to unload the material. After the mixing host door is automatically closed, the main engine door is checked and the door is closed. At the same time, the pressure water tank drainage pneumatic ball valve 10 and the cleaning air supply pneumatic ball valve 11 are opened for 1 to 5 seconds. The mixed air flow of air and clean water passes through the air pipe 6 and the cleaning nozzle 13 and is sprayed to the position where there is cement residue on the inner side of the discharge hopper 5. After cleaning for 1 to 10 seconds, the pressure water tank drainage pneumatic ball valve 10 and the cleaning air supply pneumatic ball valve 11 are closed to stop cleaning. Example 2

[0020] During use and cleaning, the discharge hopper is provided with a temporary storage device, and the manual ball valve 12 is used to control the water output, and the water output is controlled to be at a suitable position where it can be completely atomized when the cleaning nozzle 13 is sprayed out. The control system enters the mixing station production line system, and the production line mixing host completes one pot of material each time, and the mixing host door is opened to discharge the material. After the mixing host door is automatically closed, the main engine door is checked to see that the door is closed, and the discharge temporary storage bucket is opened, and the discharge temporary storage bucket is also unloaded. After the discharge temporary storage bucket is closed, the discharge temporary storage bucket detects that the door is closed, and at the same time, the air pressure water tank drainage pneumatic ball valve 10 and the cleaning air supply pneumatic ball valve 11 are opened for 1 second to 5 seconds, and the mixed air flow of air and clean water passes through the air pipe 6 and the cleaning nozzle 13 and is sprayed to the position where there is cement residue on the inner side of the discharge hopper 5. After cleaning for 1 second to 10 seconds, the air pressure water tank drainage pneumatic ball valve 10 and the cleaning air supply pneumatic ball valve 11 are closed to stop cleaning. Example 3

[0021] When in use, the pressure water tank is filled with water, and the pressure water tank 3 is also filled with water into the control system of the mixing station production line. When filling water, the pressure water tank air supply pneumatic ball valve 7 and the pressure water tank drainage pneumatic ball valve 10 are closed, and the pressure water tank exhaust pneumatic ball valve 8 is opened. When the pressure water tank exhaust pneumatic ball valve 8 is opened, or the pressure water tank water addition pneumatic ball valve 9 is opened, the pressure water tank drainage pneumatic ball valve 10 and the cleaning air flow supply pneumatic ball valve 11 cannot be opened to discharge the air pressure inside the pressure water tank 3. After the air pressure inside the pressure water tank 3 is discharged, the pressure water tank water addition pneumatic ball valve 9 is opened, and clean water enters the interior of the pressure water tank 3 from the water tank 4. It is assumed that after each cleaning system is turned on for cleaning, the water injection system is also turned on for water injection.

[0022] The protection scope of the present invention shall be subject to the claims.

Claims

1. A method for cleaning a discharging hopper of a mixing station, characterized in that: The method comprises the following steps: step 1, storing gas in an air storage tank, starting an air compressor (1) 1 to inflate the air storage tank (2); step 2, filling the air pressure tank with water; during the filling, the air pressure tank air supply pneumatic ball valve (7) and the air pressure tank water discharge pneumatic ball valve (10) are closed; the air pressure tank exhaust pneumatic ball valve (8) is opened to discharge the air pressure inside the air pressure tank (3); after the air pressure inside the air pressure tank (3) is discharged, the air pressure tank water supply pneumatic ball valve (9) is opened, and clean water enters the air pressure tank (3) from the water tank (4); step 3, cleaning; during the cleaning, the air pressure tank water discharge pneumatic ball valve (10) and the cleaning air supply pneumatic ball valve (11) are opened at the same time, and a mixed air flow of air and clean water passes through the air pipe (6) and the cleaning nozzle (13) and is sprayed to the position where cement remains on the inner side of the discharge hopper (5) to clean the cement. Each time the cleaning is done, the discharge shake (5) will not clump.

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