Steel ball feeding device for furnace coal mill
By moving the steel ball adding port in the furnace coal mill to the separator position and installing an isolation door and electrical interlock, the problem of frequent high-altitude operations in the existing technology is solved, a safe, stable and convenient steel ball adding process is achieved, and the reliability and safety of equipment operation are improved.
Patent Information
- Application Number
- CN202422444981.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-10
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-10-10
AI Technical Summary
The existing furnace coal mill and steel ball device pipeline design leads to frequent high-altitude operations, easy blockage and leakage, affecting the safe and economic operation of equipment and personal safety.
The steel ball adding port was moved from 12.6 meters to the separator position, an isolation door and electrical interlock were installed, and multi-caliber steel ball adding ports and plug-in plate mechanisms were used to achieve the separation and precise addition of steel ball storage bins.
It reduces the difficulty and danger of operation, improves the safety and stability of equipment, reduces pipeline blockage and wear, and improves work efficiency and equipment reliability.
Smart Images
Figure CN223381720U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of coal grinding equipment, in particular to a furnace coal grinding machine adding steel ball device. Background Art
[0002] The furnace coal mill uses a low-speed rotating drum to drive the steel balls inside the drum to move. The steel balls impact, squeeze and grind the raw coal to break the coal blocks and grind them into powder.
[0003] During the operation of the unit, due to the consumption of steel balls, the ratio of large and small steel balls changes, and new steel balls need to be continuously added to ensure the pulverizing output of the coal mill and reduce the current of the coal mill. New steel balls are added through the steel ball adding device from the 12.6-meter position, which causes great wear on the steel ball adding pipeline. In addition, due to the erosion of coal powder, it is easy to get blocked and leaked at the elbow. After the leakage, steel balls cannot be added in time, affecting the output of the pulverizing system and the civilized management of the site.
[0004] The original steel ball installation for the coal mill connected the pipe to the separator at a height of 12.6 meters. This long distance made the elbow susceptible to clogging with pulverized coal. Furthermore, the frequent addition of steel balls caused significant wear and tear on the elbow, leading to repeated leakage. The steel ball installation was also located 12.6 meters above the ground, compromising the safe and economical operation of the equipment and personnel safety. Utility Model Content
[0005] The purpose of this utility model is to provide a steel ball adding device for a coal mill. By moving the steel ball adding port from 12.6 meters to the separator, the pipe length is significantly shortened. This eliminates the need for operators to perform high-altitude operations to add steel balls, reducing operational difficulty and risk. This solves the aforementioned problem.
[0006] To achieve the above objectives, the present invention provides the following technical solutions:
[0007] A device for adding steel balls to a furnace coal mill includes a coal feeder, which is a device for conveying coal to the furnace coal mill. The coal feeder is connected to a lower coal pipe, which is a passage connecting the coal feeder and the furnace coal mill and is used to convey coal to the furnace coal mill. The lower coal pipe passes through the side of the furnace coal mill and is characterized in that an isolation door is installed at the connection between the lower coal pipe and the furnace coal mill, which can isolate the lower coal pipe and the furnace coal mill to facilitate maintenance and operation. A steel ball adding port is provided at the upper end of the lower coal pipe, which is an inlet for adding steel balls to the furnace coal mill. The steel ball adding port is connected to a steel ball storage bin located at a high place through a pipeline, and a plug-in mechanism is installed in the pipeline.
[0008] There are three steel ball adding ports, and their diameters are respectively equivalent to the diameters of three types of steel balls. Setting three steel ball adding ports with different diameters can meet the needs of adding steel balls of different types.
[0009] The steel ball adding port is removed and sealed. Removing the steel ball adding port can avoid problems such as interference or leakage when the new steel ball adding device is running.
[0010] The steel ball storage bin is divided into three compartments by partitions. These compartments can store different types of steel balls, facilitating management and use. Each compartment holds three different types of steel balls. Pipes of corresponding diameters connect the bottoms of the three compartments to the steel ball loading port, ensuring that different types of steel balls can be accurately added to the coal mill through the corresponding pipes.
[0011] The coal mill and the isolation door are electrically interlocked, so that the isolation door cannot be opened when the coal mill is in operation. The electrical interlock ensures that the isolation door will not be opened by mistake when the coal mill is in operation, thereby ensuring the safe operation of the equipment.
[0012] The plug-in plate mechanism includes a slot, which is the installation and sliding channel for the plug-in plate. A plug-in plate is slidably inserted into the slot, and the plug-in plate can slide in the slot to control the passage of the steel ball. A cylinder is fixedly installed at the tail end of the slot, and the cylinder provides power for the sliding of the plug-in plate. The top of the telescopic rod of the cylinder is fixedly connected to the side of the plug-in plate, and the position of the plug-in plate can be controlled by the extension and contraction of the cylinder, thereby realizing the opening and closing of the steel ball channel. The slot panel is penetrated by a circular opening, which is the channel for the steel ball to pass through. The size of the opening is consistent with the caliber of the steel ball. It ensures that the steel ball can pass through the opening smoothly, and at the same time prevents other impurities from entering the pipeline.
[0013] Compared with the prior art, the beneficial effects of the present invention are:
[0014] The ball loading port is located at the coal feeder, moving it from 12.6 meters to the separator, significantly shortening the pipeline length. Operators no longer need to work at height to add balls, reducing both difficulty and risk. The flush-to-the-ground piping design makes ball loading more convenient and efficient, eliminating the need for additional climbing equipment and improving work efficiency.
[0015] The isolation door facilitates management of the steel ball inlet. When not in use, the steel ball cover seals the inlet, preventing coal dust or other impurities from entering the steel ball pipe. This ensures the quality of the steel balls and the proper functioning of the steel ball feeding system. It also reduces the frequency and workload of cleaning the steel ball pipe.
[0016] The isolation door is equipped with an electrical interlock, which prevents it from being opened when the coal mill is in operation. This design effectively avoids safety accidents caused by misoperation, ensures that operators add steel balls at the correct time, and improves the safety and reliability of the equipment.
[0017] Shortened pipeline lengths reduce the possibility of pipeline blockage, wear and leakage. Pipes flush with the ground facilitate maintenance and cleaning, enabling timely detection and resolution of pipeline blockages, reducing equipment maintenance costs and extending equipment life.
[0018] Three steel ball adding ports with different calibers are set to correspond to three types of steel balls respectively, and the steel ball storage bin is also divided into three compartments to place steel balls of different types. They are connected to the steel ball adding ports through pipes of specific calibers, making the steel ball adding process more accurate, avoiding the situation of adding the wrong steel ball model, and improving the stability and reliability of the equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a diagram of a coal mill adding steel ball device in the utility model;
[0020] Figure 2 This is a three-dimensional diagram of the steel ball storage bin of a coal mill adding steel ball device of the utility model;
[0021] Figure 3 This is a three-dimensional diagram of the structure of the plug-in mechanism of a coal mill and steel ball device in this utility model;
[0022] In the figure: 1. Furnace coal mill; 2. Coal feeder; 21. Coal feeder pipe; 22. Isolation door; 23. Steel ball feeding port; 3. Steel ball storage bin; 4. Insertion plate mechanism; 41. Slot; 42. Insertion plate; 43. Cylinder. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the present invention will be fully described below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0024] like Figure 1-3 As shown, a steel ball adding device for a furnace coal mill includes a coal feeder 2, and the coal feeder 2 is connected to a lower coal pipe 21, and the lower coal pipe 21 passes through the side of the furnace coal mill 1. It is characterized in that an isolation door 22 is installed at the connection between the lower coal pipe 21 and the furnace coal mill 1, and a steel ball adding port 23 is provided at the upper end of the lower coal pipe 21. The steel ball adding port 23 passes through a pipe to a steel ball storage bin 3 located at a high place, and a plug-in plate mechanism 4 is installed in the pipe.
[0025] There are three steel ball adding ports 23, and their diameters are respectively equal to the diameters of three types of steel balls.
[0026] The steel ball adding port is removed and sealed.
[0027] The steel ball storage bin 3 is divided into three chambers by partitions, and the three chambers respectively place three types of steel balls. The bottoms of the three chambers are connected to the steel ball adding port 23 through pipes of corresponding calibers.
[0028] The coal mill 1 and the isolation door 22 are electrically interlocked. When the coal mill 1 is in operation, the isolation door 22 cannot be opened.
[0029] The plug-in plate mechanism 4 includes a slot 41, in which a plug-in plate 42 is slidably inserted. A cylinder 43 is fixedly installed at the tail end of the slot 41, and the top of the telescopic rod of the cylinder 43 is fixedly connected to the side of the plug-in plate 42. A circular opening is passed through the panel of the slot 41, and the size of the opening is consistent with the diameter of the steel ball.
[0030] The following is the specific implementation of the coal mill and steel ball device of the furnace:
[0031] First, tightly connect the coal feeder 2 to the lower coal pipe 21 to ensure that the connection is firm and reliable and there will be no coal leakage. The lower coal pipe 21 must accurately pass through the side of the furnace mill 1, and an isolation door 22 must be installed at the connection between the two. Next, open the steel ball adding port 23 at the upper end of the lower coal pipe 21. Three steel ball adding ports 23 must be opened, and the diameter of each steel ball adding port 23 is equivalent to the diameter of three different types of steel balls. At the same time, the original steel ball adding port is removed and tightly sealed with appropriate sealing materials to ensure that there will be no leakage or interference with the operation of the new device.
[0032] Then, the steel ball storage bin 3 is divided into three chambers by partitions, and each chamber must have enough space to place steel balls of corresponding models. The bottom of each chamber is connected to the steel ball adding port 23 on the lower coal pipe 21 through a pipe of corresponding caliber. An electrical interlock is set for the furnace coal mill 1 and the isolation door 22. Through electrical control, the operating status of the furnace coal mill 1 is associated with the operation of the isolation door 22. When the furnace coal mill 1 is in operation, the isolation door 22 cannot be opened. Finally, the plug-in mechanism 4 is installed. The plug-in mechanism 4 includes a slot 41, in which a plug-in plate 42 is slidably inserted. A cylinder 43 is fixedly installed at the tail end of the slot 41, and the top of the telescopic rod of the cylinder 43 is fixedly connected to the side of the plug-in plate 42. The sliding of the plug-in plate 42 is controlled by the extension and contraction of the cylinder 43. The panel of the slot 41 is penetrated by a circular opening, the size of the opening is consistent with the caliber of the steel ball, to ensure that the steel ball can pass smoothly. When steel balls need to be added, the cylinder 43 controls the sliding of the insert plate 42 to open the opening, allowing the steel balls to pass from the steel ball storage bin 3 through the pipeline and the steel ball adding port 23 into the coal lower pipe 21 and finally into the coal mill 1. When steel balls do not need to be added, the insert plate 42 closes the opening to prevent the steel balls from accidentally falling.
Claims
1. A steel ball adding device for a furnace coal mill, comprising a coal feeder (2), wherein the coal feeder (2) is connected to a coal lowering pipe (21), and the coal lowering pipe (21) passes through the side of the furnace coal mill (1), characterized in that: An isolation door (22) is installed at the connection between the lower coal pipe (21) and the furnace coal mill (1). A steel ball adding port (23) is provided at the upper end of the lower coal pipe (21). The steel ball adding port (23) is connected to a steel ball storage bin (3) located at a high position through a pipeline, and a plug-in mechanism (4) is installed in the pipeline.
2. A coal mill steel ball adding device according to claim 1, characterized in that: There are three steel ball adding ports (23), and their calibers are respectively equivalent to the calibers of three types of steel balls.
3. A coal mill steel ball adding device according to claim 1, characterized in that: The steel ball adding port is removed and sealed.
4. A coal mill steel ball adding device according to claim 1, characterized in that: The steel ball storage bin (3) is divided into three chambers by a partition, and three types of steel balls are placed in the three chambers respectively. The bottoms of the three chambers are connected to the steel ball adding port (23) through pipes of corresponding diameters.
5. The coal mill steel ball adding device according to claim 1, characterized in that: The coal mill (1) and the isolation door (22) are electrically interlocked, so that when the coal mill (1) is in operation, the isolation door (22) cannot be opened.
6. A coal mill steel ball adding device according to claim 1, characterized in that: The plug-in plate mechanism (4) includes a slot (41), a plug-in plate (42) is slidably inserted into the slot (41), a cylinder (43) is fixedly installed at the tail end of the slot (41), the top end of the telescopic rod of the cylinder (43) is fixedly connected to the side of the plug-in plate (42), and a circular opening is passed through the panel of the slot (41), and the size of the opening is consistent with the diameter of the steel ball.