Water spraying system of vertical mill

Abstract

The utility model discloses a vertical mill water spraying system which is composed of a water spraying station, a water spraying pipeline and an in-mill water spraying pipe, the water spraying station is connected with the in-mill water spraying pipe through the water spraying pipeline, and the water spraying station comprises a water spraying system used for spraying water and an air spraying system used for spraying air; the in-mill water spraying pipe comprises an outer protection pipe and an inner water spraying pipe, the outer protection pipe is composed of a replaceable protection pipe and a fixed protection pipe, the replaceable protection pipe is connected with the fixed protection pipe, the inner water spraying pipe is composed of a water spraying pipe, a nozzle and a water spraying pipe positioning flange, the nozzle is installed at the water spraying end of the water spraying pipe, and the water spraying pipe positioning flange is connected to one end of the water spraying pipe. The water spraying pipe is installed in the outer protection pipe. The water spraying pipe can be pulled out from the outside for inspection and maintenance without entering the mill, so that the maintenance is convenient; during replacement, spare parts can be quickly replaced only by dismounting flange bolts on the inner water spraying pipe, so that the device is very practical; and an air injection system is arranged, so that the situation that powder in the mill enters a spray head to cause blockage when water is not sprayed is prevented.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical equipment technology, and specifically relates to a vertical mill water spraying system. Background Technology

[0002] In vertical mill systems used in the cement, building materials, and steel smelting industries, especially cement vertical mills, slag vertical mills, and vertical mills processing raw materials with poor grindability, internal water spraying is essential when the material layer cannot be stabilized during mill operation. Internal water spraying is a crucial guarantee for stable mill operation. However, due to the continuous scouring and wear of the spray pipes by the material inside the mill, and the inability to frequently remove and maintain the pipes for inspection, the spraying function often fails after a period of use. Furthermore, most water tanks in spraying stations currently use remote-controlled float valves to control the water level. However, due to the long operating time of the spraying system, the failure rate of the float valve's stop valve is very high. Float valve failure can cause the water level in the tank to exceed the maximum limit, resulting in overflow into the sewer system. This leads to water waste and disrupts the normal operation of the spraying station. Utility Model Content

[0003] The purpose of this invention is to provide a water spraying system for a vertical mill to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a vertical mill water spraying system, comprising a water spraying station, a water spraying pipeline, and an internal water spraying pipe, wherein the water spraying station is connected to the internal water spraying pipe through the water spraying pipeline, and the water spraying station includes a water spraying system for spraying water and an air spraying system for spraying air.

[0005] The inner water spray pipe of the mill includes an outer protective pipe and an inner water spray pipe. The outer protective pipe consists of a replaceable protective pipe and a fixed protective pipe, which are connected together. The inner water spray pipe consists of a water spray pipe, a nozzle, and a water spray pipe positioning flange. The nozzle is installed at the water spray end of the water spray pipe, and the water spray pipe positioning flange is connected to one end of the water spray pipe. The water spray pipe is installed inside the outer protective pipe.

[0006] Preferably, the water spraying system includes a water tank, a water pump, a flow regulating valve, and a flow meter installed on the water delivery pipeline. The water tank is equipped with a pressure transmitter and an inlet solenoid ball valve.

[0007] Preferably, the jet system includes an intake solenoid valve and an intake check valve installed on the air delivery pipeline, and the air delivery pipeline is connected to the water delivery pipeline.

[0008] Preferably, the water pump outlet is provided with a bypass connected to the water tank for adjusting the water output and for water pump testing.

[0009] Preferably, a bypass is provided on one side of the flow regulating valve for maintenance.

[0010] Preferably, a pipeline solenoid valve is also provided on the water delivery pipeline, and a bypass is provided on one side of the pipeline solenoid valve for maintenance.

[0011] Preferably, an inlet filter is provided on the inlet side of the water tank.

[0012] Preferably, an air intake filter is installed on the air supply pipeline.

[0013] Preferably, the outer side of the water spray end of the water spray pipe is provided with a steel pipe for wear prevention.

[0014] Preferably, a pipe filter is also installed on the water delivery pipeline.

[0015] The technical effects and advantages of this utility model are as follows: During routine maintenance, there is no need to enter the mill; the water spray pipe can be pulled out from the outside for inspection and maintenance, making maintenance convenient. When replacing, the spare parts can be quickly replaced simply by removing the flange bolts on the inner water spray pipe, which is very practical.

[0016] The system uses a water solenoid ball valve, water pump and pressure transmitter to supply water to the water tank, which ensures stable water supply and low failure rate.

[0017] An air jet system is installed to prevent powder from entering the nozzle and causing blockage when water is not being sprayed. Attached Figure Description

[0018] Figure 1 This is a system schematic diagram of this utility model;

[0019] Figure 2 This is a schematic diagram of the installation position of this utility model;

[0020] Figure 3 This is a schematic diagram of the water spray pipe structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the internal water spray pipe of the mill.

[0022] In the diagram, 1. Spray station; 11. Water tank; 12. Inlet filter; 13. Inlet solenoid ball valve; 14. Pressure transmitter; 15. Pump; 16. Pipeline filter; 17. Flow regulating valve; 18. Flow meter; 19. Pipeline solenoid valve; 110. Outlet check valve; 111. Air inlet filter; 112. Air inlet solenoid valve; 113. Air inlet check valve; 2. Spray pipeline; 3. Internal spray pipe; 31. Spray pipe; 32. Nozzle; 33. Spray pipe positioning flange; 34. Replaceable protective pipe; 35. Fixed protective pipe. Detailed Implementation

[0023] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] like Figure 1 As shown, the function of this invention is to spray water onto the material layer to stabilize it during mill operation when the material layer becomes unstable and the mill vibrates. The device consists of a water spraying station 1, a water spraying pipeline 2, and an internal water spraying pipe 3.

[0025] like Figure 1 As shown, when the water spray system is put into operation, the electrical control system detects the pressure of the pressure transmitter 14 and determines the water level based on the water pressure. The circulating water in the plant is connected to the inlet of the water tank 11. If the water level in the water tank 11 is lower than the lower limit, the water pump 15 cannot start, and the inlet solenoid ball valve 13 opens to allow water in. Since the incoming water volume is much greater than the supply water volume, the water pump 15 starts normally when the water level rises to the lower working limit. When the water level rises to the upper working limit, the inlet solenoid ball valve 13 automatically closes. If the water level is within the normal operating range, the water pump 15 starts normally. When the water level drops to the lower working limit, the inlet solenoid ball valve 13 opens to allow water in. When the water level continues to drop below the lower limit, the water pump 15 automatically stops and cannot start. The inlet filter 12 ensures the cleanliness of the incoming water. The overflow outlet of the water tank must be connected to the drainage ditch.

[0026] like Figure 1 As shown, a bypass to the water tank 11 is provided at the outlet of water pump 15 for adjusting the water flow and for pump commissioning. The water enters through flow regulating valve 17 at the outlet of water pump 15. A pipeline filter 16 is installed before flow meter 18 to ensure the cleanliness of the incoming water and the safe operation of flow regulating valve 17 and flow meter 18. Flow regulating valve 17 and flow meter 18 are interlocked. The signal from flow meter 18 is fed back to the electrical control system, which compares the feedback value with the spray volume value given by the central control system, and then adjusts the opening of flow regulating valve 17 in real time to control the spray volume. A bypass is provided for flow regulating valve 17 for maintenance. A pipeline solenoid valve 19 is used as the main switch for the outlet pipeline, and a bypass is provided for maintenance. A one-way valve 110 is installed at the outlet to prevent air leakage into the water path during spraying.

[0027] like Figure 1 As shown, an intake filter 111 is installed at the compressed air inlet to ensure the cleanliness of the compressed air. An intake solenoid valve 112 controls the main switch of the intake pipeline and includes a bypass for maintenance. An intake check valve 113 is installed at the intake port to prevent water from entering the air path during water spraying.

[0028] like Figure 2 and Figure 3 As shown, water spray station 1 is connected to water spray pipe 3 inside the mill via water spray pipe 2. Water spray pipe 3 inside the mill is located on the feed side of the grinding roller, ensuring that water is sprayed onto the material about to enter the bottom of the grinding roller. The spraying position must be 200mm to 300mm away from the bottom crushing area of ​​the grinding roller. Water must not be sprayed onto the roller sleeve.

[0029] like Figure 4 As shown, the internal water spray pipe 3 of the mill includes an outer protective pipe and an inner water spray pipe. The outer protective pipe consists of a replaceable protective pipe 34 and a fixed protective pipe 35. The fixed protective pipe 35 is welded to the inner shell of the mill and has flanges at both ends. The replaceable protective pipe 34 has an overlay layer on the outside and a flange at one end. The replaceable protective pipe 34 and the fixed protective pipe 35 are connected as a whole by flanges. The inner water spray pipe consists of a spray pipe 31, a nozzle 32, and a spray pipe positioning flange 33. A steel pipe is added to the outside of the spray end of the spray pipe 31 to prevent wear and extend the service life of the spray pipe. The nozzle 32 is installed at the spray end of the spray pipe 31. The water spray pipe 31 is installed inside the outer protective pipe. After the actual water spray direction and position are determined through on-site debugging, the water spray pipe positioning flange 33 is first fixed to the flange of the fixed protective pipe 35 with bolts. Then, the water spray pipe 31 and the water spray pipe positioning flange 33 are welded together. Finally, matching steel stamps are marked on the flanges of the water spray pipe positioning flange 33 and the fixed protective pipe 35, and red paint is applied as a mark. During routine maintenance, it is not necessary to enter the mill. The water spray pipe can be pulled out from the outside for inspection and maintenance, and then reinstalled according to the matching mark position. When entering the mill for maintenance, if the replaceable protective pipe 34 is found to be worn to the point of needing replacement, simply remove the flange bolts and quickly replace the spare part.

[0030] The electrical control system of water spray station 1 can communicate with the central control system. The central control system can start water pump 15, set the water volume, and view the actual water volume fed back by flow meter 18. The electrical control system of water spray station 1 is located locally at the water spray station and is housed in the local control box. When water spraying is activated, the air intake solenoid valve 112 automatically closes, preventing airflow. When air jetting is activated, the pipeline solenoid valve 19 automatically closes, preventing waterflow. The purpose of air jetting is to prevent powder from the mill from entering the nozzle 32 and causing blockage when water spraying is not in use.

[0031] In summary, this vertical mill water spray system has a reasonable structure, is stable, highly automated, and easy to maintain and repair. It effectively ensures the normal operation of the vertical mill's water spray function and maintains the mill's normal and stable operation.

[0032] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A vertical mill water spray system, characterized in that: It consists of a water spraying station (1), a water spraying pipeline (2) and a water spraying pipe inside the mill (3). The water spraying station (1) is connected to the water spraying pipe inside the mill (3) through the water spraying pipeline (2). The water spraying station (1) includes a water spraying system for spraying water and a jet spraying system for spraying air. The inner water spray pipe (3) includes an outer protective pipe and an inner water spray pipe. The outer protective pipe consists of a replaceable protective pipe (34) and a fixed protective pipe (35). The replaceable protective pipe (34) and the fixed protective pipe (35) are connected. The inner water spray pipe consists of a water spray pipe (31), a nozzle (32), and a water spray pipe positioning flange (33). The nozzle (32) is installed at the water spray end of the water spray pipe (31). The water spray pipe positioning flange (33) is connected to one end of the water spray pipe (31). The water spray pipe (31) is installed inside the outer protective pipe.

2. The vertical mill water spray system according to claim 1, characterized in that: The water spraying system includes a water tank (11), a water pump (15), a flow regulating valve (17), and a flow meter (18) installed on the water supply pipeline. The water tank (11) is equipped with a pressure transmitter (14) and an inlet solenoid ball valve (13).

3. The vertical mill water spray system according to claim 2, characterized in that: The jet system includes an intake solenoid valve (112) and an intake check valve (113) installed on the air delivery pipeline, which is connected to the water delivery pipeline.

4. A vertical mill water spray system according to claim 2, characterized in that: The outlet of the water pump (15) is provided with a bypass to the water tank (11) for adjusting the water output and for water pump testing.

5. A vertical mill water spray system according to claim 2, characterized in that: A bypass is provided on one side of the flow regulating valve (17) for maintenance.

6. A vertical mill water spray system according to claim 2, characterized in that: A pipeline solenoid valve (19) is also installed on the water delivery pipeline, and a bypass is provided on one side of the pipeline solenoid valve (19) for maintenance.

7. A vertical mill water spray system according to claim 2, characterized in that: The water tank (11) is equipped with an inlet filter (12) on the inlet side.

8. A vertical mill water spray system according to claim 3, characterized in that: An air intake filter (111) is installed on the air supply pipeline.

9. A vertical mill water spray system according to claim 1, characterized in that: The water spray pipe (31) has a steel pipe on the outside of the water spray end pipe to prevent wear.

10. A vertical mill water spray system according to claim 2, characterized in that: A pipeline filter (16) is also installed on the water delivery pipeline.

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