A disc-type coal mill

Abstract

The present invention relates to the technical field of coal mills, and specifically to a hydraulic variable loading mechanism for a disc-type coal mill. The present invention comprises a accommodating bin and a replacement structure, wherein the bottom end of the accommodating bin is fixedly connected to a base, the surface of the base is fixedly connected to a rack, the surface of the rack is fixedly connected to a hydraulic cylinder, the free end of the hydraulic cylinder is fixedly connected to a sealing disc, the inner wall of the sealing disc is installed with a motor, the output shaft of the motor is provided with a rolling disc, the inner wall of the rolling disc is provided with a replacement structure, the replacement structure comprises a block, the surface of the block is fixed to the rolling disc, the block is sleeved on the surface of the motor output shaft, a connector is slidably inserted into the interior of the block, the connector is plugged into the output shaft of the motor, and the inner wall of the rolling disc is slidably connected to a stop block. The present invention solves the problem that the existing rolling disc may be damaged, and if it is not replaced in time, it is easy to cause the rolling speed of the coal mine to slow down, thereby affecting the working efficiency of the coal mill.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mills, in particular to a disc type coal mill. Background Art

[0002] A coal mill is a machine that grinds coal. Workers transport the coal into the mill and crush it into powder before transportation and use. The coal mill is an indispensable part of some factory thermal power generating units.

[0003] During the use of the coal mill, the rolling disc will be damaged. If it is not replaced in time, it will easily cause the coal mine's rolling speed to slow down, thereby affecting the working efficiency of the coal mill. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the existing rolling disc that may be damaged and, if not replaced in time, may easily lead to a slowdown in the rolling speed of the coal mine, thereby affecting the working efficiency of the coal mill, and to propose a conveying disc type coal mill.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a disc-type coal mill, including a accommodating bin, a control module and a replacement structure, the bottom end of the accommodating bin is fixedly connected to a base, the surface of the base is fixedly connected to a frame, the surface of the frame is fixedly connected to a hydraulic cylinder, the free end of the hydraulic cylinder is fixedly connected to a sealing disc, the inner wall of the sealing disc is installed with a motor, the output shaft of the motor is provided with a rolling disc, the inner wall of the rolling disc is provided with a replacement structure, the replacement structure includes a block, the surface of the block and the rolling disc are fixed, the block is sleeved on the surface of the motor output shaft, the interior of the block is slidably inserted with a plug-in, the plug-in and the output shaft of the motor are plugged in, and the inner wall of the rolling disc is slidably connected with a block; the rolling disc is sleeved on the motor output shaft through the block, and the plug-in can connect the output shaft of the motor and the block together, so that the rolling disc and the output shaft of the motor are connected.

[0006] Preferably, the surface of the block is rotatably connected to a rotating plate, the inner wall of the rolling disc is provided with a groove, and the size of the rotating plate is adapted to the size of the groove; the rotating plate is rotated until it is inserted into the groove, at which time the rotating plate will limit the movement of the block, thereby allowing the block to limit the movement of the connector.

[0007] Preferably, an insertion rod is slidably inserted into the inner wall of the rolling disc, the insertion rod is plugged into the rotating plate, and the insertion rod is inserted into the rotating plate to limit the rotation of the rotating plate.

[0008] Preferably, a spring is fixedly connected between the insertion rod and the rolling disc, and the insertion rod is "L"-shaped; the "L"-shaped insertion rod is convenient for inserting into the rotating plate and also for controlling it, and the spring between the insertion rod and the rolling disc will always push the insertion rod to be inserted into the rotating plate.

[0009] Preferably, the inner wall of the rolling disc is slidably connected to a shield plate, the interior of the shield plate is rotatably connected to a round wheel, the interior of the shield plate is slidably inserted with an insertion strip, the insertion strip and the round wheel are threadedly connected, and the insertion strip and the rolling disc are plugged in; the round wheel is rotated to drive the insertion strip into the rolling disc, thereby limiting the movement of the shield plate.

[0010] Preferably, a connecting groove is provided on the inner wall of the rolling disc, and the size of the connecting groove is adapted to the size of the insert; the connecting groove is used for inserting the insert to prevent the shield from moving in the rolling disc.

[0011] Preferably, a limiting structure is provided on the surface of the accommodating bin, and the limiting structure includes a top plate, which is fixedly installed to the accommodating bin by screws, and a connecting plate is fixedly connected to the surface of the top plate, and a cylinder is fixedly connected to the surface of the connecting plate, and a slider and a sliding plate are slidably inserted into the inner wall of the connecting plate, and the sliding plate is located between the cylinder and the slider, and a spring is fixedly connected between the slider and the connecting plate, and a telescopic ladder is sleeved on the surface of the cylinder; the telescopic ladder first approaches the slider, and then squeezes the slider toward the inside of the connecting plate, at this time the slider will no longer be located on the side wall of the cylinder, and then slide the telescopic ladder horizontally to allow the telescopic ladder to be sleeved on the surface of the cylinder, and at this time the slider will be pushed and reset by the spring on its surface, so as to prevent the telescopic ladder from falling off the surface of the cylinder.

[0012] Preferably, the inner wall of the connecting plate is fixedly connected to a round bar, the surface of the round bar is fixedly connected to a disc, and the surface of the round bar is covered with a sliding plate; when the telescopic ladder is rotated downward, the telescopic ladder will squeeze the sliding plate, and the sliding plate will squeeze the slider, allowing the slider to leave the side wall of the cylinder, thereby facilitating the removal of the telescopic ladder.

[0013] Preferably, the slider and the sliding plate are both in an "L" shape, and the sliding plate is located between the cylinder and the slider; the sliding plate is used to push the slider, and the "L"-shaped slider and the "L"-shaped sliding plate are more convenient to drive.

[0014] Preferably, the control module includes a first filter, a liquid level gauge, a thermometer, a first two-way filter, a two-position two-way solenoid valve, a cooler, an electric motor, a double-connected pump, a first throttle valve, a first relief valve, a second throttle valve, a first one-way valve, a second relief valve, a third throttle valve, a high-pressure two-way filter, a second one-way valve, a first speed regulating valve, a third one-way valve, a pressure transmission, a fourth throttle valve, a pressure gauge, a fifth throttle valve, a first accumulator, a third relief valve, a sixth throttle valve, a two-position four-way manual reversing valve, a seventh throttle valve, a two-position four-way solenoid reversing valve, a two-position two-way solenoid reversing valve, a second accumulator, a fourth relief valve, a hydraulic cylinder, a second speed regulating valve, an eighth throttle valve, a fifth relief valve, a ninth throttle valve, a tenth throttle valve, an eleventh throttle valve, a proportional relief valve, and the electric motor The drag double pump provides hydraulic kinetic energy, and the working pressure value is set by the second relief valve through the first one-way valve. The working pressure oil passes through the third throttle valve, high-pressure two-way filter, the second one-way valve, the pressure transmission, the proportional relief valve and the hydraulic variable loading system control cabinet, and through the central control room. According to the operating load of the spoke-type coal mill, it is converted into the corresponding loading hydraulic pressure numerical signal and sent to the hydraulic variable loading system control cabinet to control the required working pressure of the hydraulic oil. It is remotely controlled through the two-position four-way manual reversing valve, the two-position four-way solenoid reversing valve, the two-position two-way solenoid reversing valve and the fifth relief valve, and the working pressure is loaded on the upper chamber of the hydraulic cylinder through the sixth throttle valve, so that the rolling disc coal mill can achieve hydraulic variable loading, thereby matching the grinding force of the spoke-type coal mill and reducing the power consumption of the spoke-type coal mill operating load.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are:

[0016] 1. In the present invention, when the rolling disc needs to be replaced after being worn, first open the shield, then remove the block from the rolling disc, at this time the connector will no longer be restricted by the block, then remove the connector from the block and the motor output shaft, at this time the block will no longer be connected to the motor output shaft, then remove the rolling disc and the block from the surface of the motor output shaft, and replace it with a new rolling disc, put the block on the surface of the new rolling disc on the output shaft of the motor, then insert the connector into the block and the motor output shaft, and at the same time insert the block into the rolling disc. In the pressure plate, the block will press against the connector to prevent it from falling off the block, and then the turn plate will be rotated. At this time, the turn plate will be stuck in the crushing plate, thereby limiting the movement of the block. At the same time, the insertion rod will be inserted into the turn plate to limit the rotation of the turn plate. Then the shield will be pulled out from the crushing plate and block it, and then the round wheel will be rotated. The round wheel will drive the insertion strip to move, and the insertion strip will be inserted into the connecting groove, thereby limiting the movement of the shield. By setting up a replacement structure, the efficiency of replacing the crushing plate is greatly improved, thereby reducing the workload of the staff.

[0017] When the worker is working, he or she first uses the top of the telescopic ladder to squeeze the slider to make it slide into the inside of the connecting plate, and then moves the telescopic ladder horizontally so that it is sleeved on the surface of the cylinder. At this time, the slider will be pushed back by the spring on its surface. When the worker is not using the telescopic ladder, he or she first puts the telescopic ladder in a vertical position with the help of the cylinder. At this time, the telescopic ladder will squeeze the sliding plate, and the sliding plate will simultaneously push the slider to move, so that the slider moves away from the side wall of the cylinder, and then slide the telescopic ladder to move the telescopic ladder out of the cylindrical surface. The round bar plays a role in guiding the sliding plate, and the disc prevents the sliding plate from sliding out of the round bar surface. The top plate can be mounted on the storage bin by screws, so that the connecting plate is placed on the storage bin. By setting the limiting structure, it is greatly convenient for the worker to place the telescopic ladder when working, and effectively improves safety.

[0018] 3. In the present invention, the double pump, the first throttle valve, and the first relief valve provide loading for the hydraulic cylinder to rise; the two-way filter, the cooler, the two-position two-way solenoid valve, and the tenth throttle valve clean and cool the hydraulic oil; the fifth throttle valve, the first accumulator, the third relief valve, and the speed regulating valve stabilize the pressure of the hydraulic oil; the second accumulator and the fourth relief valve enable the hydraulic cylinder to unload and maintain the working oil pressure; the second speed regulating valve and the eighth throttle valve are the speed regulating circuit; the liquid level gauge, the thermometer, the third one-way valve, and the pressure gauge are used for liquid level alarm and display of the working oil pressure and temperature; the seventh throttle valve is used for adjustment when the system oil returns; the fourth throttle valve is used to adjust the pressure of the pressure gauge; the second throttle valve, the ninth throttle valve, and the eleventh throttle valve are used for system oil pressure regulation; when the oil returns, it returns to the oil tank through the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention provides a schematic diagram of the three-dimensional structure of a disc-type coal mill;

[0020] Figure 2 The present invention proposes a disc type coal mill Figure 1 Schematic diagram of the structure at A;

[0021] Figure 3 A partial schematic diagram of a connecting plate in a disc-type coal mill proposed by the present invention;

[0022] Figure 4 The present invention proposes a disc type coal mill Figure 3 Schematic diagram of part of the structure;

[0023] Figure 5 The present invention proposes a disc type coal mill Figure 4 Schematic diagram of the bottom side structure;

[0024] Figure 6 The present invention provides a partial structural diagram of a sealing disc in a disc-type coal mill;

[0025] Figure 7 The present invention proposes a hydraulic variable loader for a conveyor-plate coal mill. Figure 6 Schematic diagram of the structure at B;

[0026] Figure 8 The present invention provides a partial structural diagram of a grinding disc in a disc-type coal mill;

[0027] Figure 9 The present invention proposes a disc type coal mill Figure 8 Schematic diagram of the structure at C;

[0028] Figure 10 The present invention provides a system block diagram of a disc-type coal mill.

[0029] Legend: 1. Storage bin; 2. Base; 3. Shelf; 4. Hydraulic cylinder; 6. Limiting structure; 61. Connecting plate; 62. Top plate; 63. Slider; 64. Sliding plate; 65. Cylinder; 66. Round bar; 67. Disc; 7. Motor; 8. Rolling disc; 9. Replacement structure; 91. Shield; 92. Round wheel; 93. Insertion bar; 94. Block; 95. Connector; 96. Abutment; 97. Turntable; 98. Insertion rod; 99. Connecting groove; 10. Telescopic ladder; 11. Sealing disc. DETAILED DESCRIPTION

[0030] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] See also Figure 1-10 The present invention provides a technical solution: a disc-type coal mill, comprising a accommodating bin 1 and a replacement structure 9, the bottom end of the accommodating bin 1 is fixedly connected to a base 2, the surface of the base 2 is fixedly connected to a rack 3, the surface of the rack 3 is fixedly connected to a hydraulic cylinder 4, the free end of the hydraulic cylinder 4 is fixedly connected to a sealing disc 11, the inner wall of the sealing disc 11 is installed with a motor 7, the output shaft of the motor 7 is provided with a rolling disc 8, and the inner wall of the rolling disc 8 is provided with a replacement structure 9.

[0033] The specific settings and functions of the replacement structure 9 and the limiting structure 6 will be described in detail below.

[0034] In this embodiment: the replacement structure 9 includes a block 94, the surface of the block 94 is fixed to the rolling disc 8, the block 94 is sleeved on the surface of the output shaft of the motor 7, the interior of the block 94 is slidably inserted with a connector 95, the connector 95 and the output shaft of the motor 7 are plugged in, and the inner wall of the rolling disc 8 is slidably connected with a block 96; the rolling disc 8 is sleeved on the output shaft of the motor 7 through the block 94, and the connector 95 can connect the output shaft of the motor 7 and the block 94 together, thereby connecting the rolling disc 8 and the output shaft of the motor 7.

[0035] Specifically, the surface of the stop block 96 is rotatably connected to a turn plate 97, and a groove is provided on the inner wall of the crushing disc 8. The size of the turn plate 97 matches the size of the groove. The turn plate 97 is rotated until it is inserted into the groove. At this time, the turn plate 97 will limit the movement of the stop block 96, thereby allowing the stop block 96 to limit the movement of the connector 95.

[0036] Specifically, an insertion rod 98 is slidably inserted into the inner wall of the crushing disc 8, and the insertion rod 98 is plugged into the rotating plate 97.

[0037] In this embodiment, the insertion rod 98 is inserted into the rotating plate 97 to limit the rotation of the rotating plate 97.

[0038] Specifically, a spring is fixedly connected between the insertion rod 98 and the rolling disc 8, and the insertion rod 98 is "L"-shaped; the "L"-shaped insertion rod 98 is convenient for inserting into the rotating plate 97 and also convenient for controlling it, and the spring between the insertion rod 98 and the rolling disc 8 will always push the insertion rod 98 to be inserted into the rotating plate 97.

[0039] Specifically, the inner wall of the rolling disc 8 is slidably connected to a baffle 91, the interior of the baffle 91 is rotatably connected to a round wheel 92, the interior of the baffle 91 is slidably inserted with an insertion strip 93, the insertion strip 93 is threadedly connected to the round wheel 92, and the insertion strip 93 is plugged into the rolling disc 8.

[0040] In this embodiment, the circular wheel 92 is rotated to drive the inserting strip 93 to be inserted into the rolling disc 8, thereby limiting the movement of the shield 91.

[0041] Specifically, a connecting groove 99 is opened on the inner wall of the rolling disc 8, and the size of the connecting groove 99 is adapted to the size of the insertion strip 93; the connecting groove 99 is used to insert the insertion strip 93 to prevent the shield 91 from moving in the rolling disc 8.

[0042] Specifically, a limiting structure 6 is provided on the surface of the accommodating bin 1, and the limiting structure 6 includes a top plate 62, which is fixedly installed on the accommodating bin 1 by screws, and a connecting plate 61 is fixedly connected to the surface of the top plate 62, and a cylinder 65 is fixedly connected to the surface of the connecting plate 61, and a slider 63 and a sliding plate 64 are slidably inserted into the inner wall of the connecting plate 61, and a spring is fixedly connected between the slider 63 and the connecting plate 61, and a telescopic ladder 10 is sleeved on the surface of the cylinder 65.

[0043] In this embodiment, the telescopic ladder 10 is first brought close to the slider 63 and then pressed toward the inside of the connecting plate 61. At this time, the slider 63 is no longer located on the side wall of the cylinder 65. The telescopic ladder 10 is then slid horizontally so that the telescopic ladder 10 is sleeved on the surface of the cylinder 65. At this time, the slider 63 is pushed back by the spring on its surface to prevent the telescopic ladder 10 from falling off the surface of the cylinder 65.

[0044] Specifically, a round bar 66 is fixedly connected to the inner wall of the connecting plate 61, a disc 67 is fixedly connected to the surface of the round bar 66, and a sliding plate 64 is sleeved on the surface of the round bar 66; when the telescopic ladder 10 is rotated downward, the telescopic ladder 10 will squeeze the sliding plate 64, and the sliding plate 64 will squeeze the slider 63, allowing the slider 63 to leave the side wall of the cylinder 65, thereby facilitating the removal of the telescopic ladder 10.

[0045] Specifically, the slider 63 and the sliding plate 64 are both "L"-shaped, and the sliding plate 64 is located between the cylinder 65 and the slider 63; the sliding plate 64 is used to push the slider 63, and the "L"-shaped slider 63 and the "L"-shaped sliding plate 64 are more convenient to drive.

[0046] Specifically, it also includes: a first filter, a liquid level gauge, a thermometer, a first two-way filter, a two-position two-way solenoid valve, a cooler, an electric motor, a double-connected pump, a first throttle valve, a first relief valve, a second throttle valve, a first one-way valve, a second relief valve, a third throttle valve, a high-pressure two-way filter, a second one-way valve, a first speed regulating valve, a third one-way valve, a pressure transmission, a fourth throttle valve, a pressure gauge, a fifth throttle valve, a first accumulator, a third relief valve, a sixth throttle valve, a two-position four-way manual reversing valve, a seventh throttle valve, a two-position four-way solenoid reversing valve, a two-position two-way solenoid reversing valve, a second accumulator, a fourth relief valve, a hydraulic cylinder, a second speed regulating valve, an eighth throttle valve, a fifth relief valve, a ninth throttle valve, a tenth throttle valve, an eleventh throttle valve, a proportional relief valve, and a motor-driven double The continuous pump provides hydraulic kinetic energy, and the working pressure value is set by the second relief valve through the first one-way valve. The working pressure oil passes through the third throttle valve, the high-pressure two-way filter, the second one-way valve, the pressure transmission, the proportional relief valve and the hydraulic variable loading system control cabinet, and through the central control room. According to the operating load of the spoke-type coal mill, it is converted into the corresponding loading hydraulic pressure numerical signal and sent to the hydraulic variable loading system control cabinet to control the required working pressure of the hydraulic oil. It is remotely controlled through the two-position four-way manual reversing valve, the two-position four-way solenoid reversing valve, the two-position two-way solenoid reversing valve and the fifth relief valve, and the working pressure is loaded on the upper chamber of the hydraulic cylinder through the sixth throttle valve, so that the rolling disc coal mill can achieve hydraulic variable loading, thereby matching the grinding force of the spoke-type coal mill and reducing the power consumption of the spoke-type coal mill operating load.

[0047] Working principle: When the rolling disc 8 needs to be replaced after being worn, first open the shield 91, then remove the block 96 from the rolling disc 8, at this time the connector 95 will no longer be restricted by the block 96, then remove the connector 95 from the block 94 and the output shaft of the motor 7, at this time the block 94 will no longer be connected to the output shaft of the motor 7, then remove the rolling disc 8 and the block 94 from the output shaft surface of the motor 7, and replace it with a new rolling disc 8, put the block 94 on the surface of the new rolling disc 8 on the output shaft of the motor 7, then insert the connector 95 into the block 94 and the output shaft of the motor 7, and at the same time insert the block 96 into the rolling disc 8, at this time the block 96 will press against the connector 95 , thereby preventing the connector 95 from falling off from the block 94, and then rotating the rotating plate 97, at this time the rotating plate 97 will be stuck in the rolling disc 8, thereby limiting the movement of the block 96, and at the same time the insertion rod 98 is inserted into the rotating plate 97 to limit the rotation of the rotating plate 97, and then the shield 91 is pulled out from the rolling disc 8 and blocks the block 94, and then the round wheel 92 is rotated, the round wheel 92 will drive the insertion bar 93 to move, and at this time the insertion bar 93 will be inserted into the connecting groove 99, thereby limiting the movement of the shield 91; and when the staff needs to go to the top of the storage bin 1 to work, they often need to use the telescopic ladder 10 to climb, and the traditional climbing method requires another staff member to hold on from the bottom, so as to avoid the ladder Therefore, when the staff is working, they first use the top of the telescopic ladder 10 to squeeze the slider 63 to make it slide into the inside of the connecting plate 61, and then move the telescopic ladder 10 horizontally so that it is sleeved on the surface of the cylinder 65. At this time, the slider 63 will be pushed by the spring on its surface to reset. When the staff is not using the telescopic ladder 10, they first put the telescopic ladder 10 in a vertical state with the help of the cylinder 65. At this time, the telescopic ladder 10 will squeeze the sliding plate 64. At this time, the sliding plate 64 will simultaneously push the slider 63 to move, so that the slider 63 is removed from the side wall of the cylinder 65. Then, the telescopic ladder 10 is slid to move the telescopic ladder 10 out of the surface of the cylinder 65, wherein the round bar 66 plays a role in guiding the sliding plate 64. The disc 67 prevents the sliding plate 64 from sliding off the surface of the round bar 66, and the top plate 62 can be installed on the accommodating chamber 1 by screws, so that the connecting plate 61 is placed on the accommodating chamber 1. By setting the limiting structure 6, it is greatly convenient for the staff to place the telescopic ladder 10 during work, effectively improving safety. Among them, the double pump, the first throttle valve, and the first relief valve provide loading and lifting of the hydraulic cylinder. The two-way filter, the cooler, the two-position two-way solenoid valve, and the tenth throttle valve are for cleaning and cooling the hydraulic oil. The fifth throttle valve, the first accumulator, the third relief valve, and the speed regulating valve are for stabilizing the pressure of the hydraulic oil. The second accumulator and the fourth relief valve are for unloading and maintaining the working oil pressure of the hydraulic cylinder.The second speed regulating valve and the eighth throttle valve form the speed regulating circuit. The level gauge, thermometer, third check valve, and pressure gauge are used for level alarms and to display the working oil pressure and temperature. The seventh throttle valve is used to regulate the return of system oil. The fourth throttle valve is used to adjust the pressure on the pressure gauge. The second, ninth, and eleventh throttle valves are used to regulate the system oil pressure. When the oil returns, it passes through the filter and returns to the oil tank.

[0048] The above description is merely a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any person skilled in the art may utilize the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes for application in other fields. However, any simple modification, equivalent change, and modification of the above embodiments made in accordance with the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A disc-type coal mill, comprising a receiving chamber (1), characterized in that: The bottom end of the accommodating bin (1) is fixedly connected to a base (2), the surface of the base (2) is fixedly connected to a rack (3), the surface of the rack (3) is fixedly connected to a hydraulic cylinder (4), the free end of the hydraulic cylinder (4) is fixedly connected to a sealing disk (11), the inner wall of the sealing disk (11) is mounted with a motor (7), the output shaft of the motor (7) is provided with a rolling disk (8), the inner wall of the rolling disk (8) is provided with a replacement structure (9), the replacement structure (9) includes a square Block (94), the surface of the block (94) is fixed to the rolling disc (8), the block (94) is sleeved on the surface of the output shaft of the motor (7), the interior of the block (94) is slidably plugged with a plug-in component (95), the plug-in component (95) is plugged into the output shaft of the motor (7), the inner wall of the rolling disc (8) is slidably connected to a block (96); the surface of the block (96) is rotatably connected to a rotating plate (97), the inner wall of the rolling disc (8) is provided with a groove, the rotating plate ( 97) is adapted to the size of the groove; a limiting structure (6) is provided on the surface of the accommodating chamber (1), the limiting structure (6) includes a top plate (62), the top plate (62) is fixedly installed with the accommodating chamber (1) by screws, the surface of the top plate (62) is fixedly connected to a connecting plate (61), the surface of the connecting plate (61) is fixedly connected to a cylinder (65), the inner wall of the connecting plate (61) is slidably inserted with a slider (63) and a sliding plate (64), the slider A spring is fixedly connected between (63) and the connecting plate (61), and the surface of the cylinder (65) is covered with a telescopic ladder (10); the inner wall of the connecting plate (61) is fixedly connected with a round bar (66), the surface of the round bar (66) is fixedly connected with a disc (67), and the surface of the round bar (66) is covered with a sliding plate (64); the shape of the slider (63) and the sliding plate (64) are both "L"-shaped, and the sliding plate (64) is located between the cylinder (65) and the slider (63).

2. A disc-type coal mill according to claim 1, characterized in that: An insertion rod (98) is slidably inserted into the inner wall of the rolling disc (8), and the insertion rod (98) is plugged into the rotating plate (97).

3. A disc-type coal mill according to claim 2, characterized in that: A spring is fixedly connected between the insertion rod (98) and the rolling disc (8), and the insertion rod (98) is in an "L" shape.

4. A disc-type coal mill according to claim 3, characterized in that: The inner wall of the rolling disc (8) is slidably connected to a shield plate (91), the interior of the shield plate (91) is rotatably connected to a round wheel (92), the interior of the shield plate (91) is slidably inserted with an insert strip (93), the insert strip (93) and the round wheel (92) are threadedly connected, and the insert strip (93) and the rolling disc (8) are plugged into each other.

5. The disc-type coal mill according to claim 4, characterized in that: The inner wall of the rolling disc (8) is provided with a connecting groove (99), and the size of the connecting groove (99) is adapted to the size of the insert (93).

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