A guard for a mine conveyor belt

Abstract

This invention discloses a protective device for a mine conveyor belt, comprising a support plate and a buffer module installed in the middle of the base frame. The support plate is fixedly installed above the buffer module. Side baffles are fixedly installed on the upper surface of the buffer module and on both sides of the support plate. A row of grooves is formed on the upper surface of the support plate, and a buffer frame is slidably connected to the inner surface of the grooves. This protective device for a mine conveyor belt, through the cooperation of the connecting frame and the buffer module, uses a buffer spring inside the groove to offset a portion of the kinetic energy of the coal. Simultaneously, the driving rack drives the driven rack to slide upward inside the second limiting groove via a meshing gear, causing the buffer roller to slide upward. Because the buffer roller contacts the unloaded area of ​​the conveyor belt body, the conveyor belt body is quickly relaxed, reducing damage to the conveyor belt body from large coal pieces, thus exhibiting good safety and inventiveness.

Description

Technical Field

[0001] This invention relates to the field of mine conveyor belts, and particularly to the field of a protective device for mine conveyor belts. Background Technology

[0002] As is well known, mine conveyor belts have advantages such as long distance, large capacity, and continuous transportation when mining coal. Existing mine conveyor belts, such as... Figure 1 As shown, mine conveyor belts are reliable in operation and easy to automate and centralize control. Especially for high-yield and high-efficiency mines, mine conveyor belts have become key equipment for efficient coal mining. Therefore, good maintenance is of great significance for maintaining normal production. Ensuring the normal operation of all mine conveyor belts is crucial for normal production at the working face. When mine conveyor belts run underground, the connection between the coal at the mined surface and the inner edge of the roadway is not tight. Coal can easily fall off under mechanical vibration and hit the upper surface of the input end of the conveyor belt body. At this time, the conveyor belt is in the process of transmission and the conveyor belt body is in a tensioned state. The impact of the kinetic energy of the coal on the conveyor belt body can easily cause damage or side slip accidents, and in severe cases, it may break. At this time, a protective device for mine conveyor belts is needed to protect the surface of the mine conveyor belt in real time. Summary of the Invention

[0003] The main objective of this invention is to provide a protective device for mine conveyor belts, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A mine conveyor belt includes a base frame, a receiving module, a conveyor belt body, a drive roller, and a drive motor. A support frame and a protective device are fixedly installed above the base frame. The protective device includes a support plate and a buffer module installed in the middle of the base frame. The support plate is fixedly installed above the buffer module. Side baffles are fixedly installed on the upper surface of the buffer module on both sides of the support plate. A row of grooves is formed on the upper surface of the support plate. A buffer frame is slidably connected to the inner surface of the grooves. The upper end of the buffer frame contacts the conveyor belt body. The inner bottom of the grooves is fixed. A buffer spring is installed, with its upper end fixedly mounted on the side of the buffer frame. A connecting frame is fixedly mounted on the bottom of the support plate. A sliding plate is provided inside the connecting frame. A pressure rod is fixedly mounted on the upper end of the sliding plate, with the upper end of the pressure rod extending into the interior of the chute. An active rack is fixedly mounted on the lower surface of the sliding plate. In this way, under the action of the kinetic energy of the coal, the bottom of the buffer frame is pressed and slides on the inner surface of the chute. Under the action of the buffer spring inside the chute, part of the kinetic energy of the coal is offset, reducing damage to the conveyor belt body.

[0006] The buffer module is equipped with side connecting plates and outer fixing rings fixedly installed on both sides. A buffer cavity is formed inside the buffer module, and a pressure roller and a buffer roller are installed inside. The two ends of the pressure roller are fixedly connected to two outer fixing rings respectively. Slide grooves are fixedly installed at both ends of the buffer rollers. A driven rack is rotatably connected to the end of the slide groove opposite to the buffer roller. A first sliding groove and a second limiting groove are formed inside the side connecting plate. A meshing gear is rotatably connected inside the side connecting plate between the first sliding groove and the second limiting groove. One side of the meshing gear meshes with the driving rack, and the outer surface of the driving rack is slidably connected to the first sliding groove. The side of the meshing gear away from the driving rack meshes with the driven rack, and the outer surface of the driven rack is slidably connected to the second limiting groove. This allows for rapid relaxation of the conveyor belt body, further reducing damage to the conveyor belt body from large coal piles.

[0007] A further improvement of the present invention is that a side clamp is fixedly installed on one side of the two side baffles facing each other, and a side limiting groove is formed on the inner surface of the side clamp. Multiple limiting rollers are rotatably connected inside the side limiting groove, and anti-slip protrusions are formed on the surface of the limiting rollers, so as to stably limit the loading area of ​​the conveyor belt body.

[0008] A further improvement of the present invention is that limit strips are fixedly installed on both sides of the inner surface of the conveyor belt body, the bottom surface of the limit strips is slidably connected to the limit rollers, and the side surface of the limit strips slides inside the side limit grooves.

[0009] A further improvement of the present invention is that a bottom limiting groove is formed on the surface of the buffer roller, a limiting protrusion is fixedly installed on the inner surface of the bottom limiting groove, the inner surface of the bottom limiting groove is slidably connected to the limiting strip, and the bottom surface of the limiting strip is in contact with the limiting protrusion.

[0010] A further improvement of the present invention is that a limiting ring is fixedly installed on the side of the sliding plate, and a guide rail is fixedly installed inside the connecting frame and on both sides of the sliding plate, and the limiting ring slides on the outer surface of the guide rail.

[0011] A further improvement of the present invention is that a reset spring is fixedly installed at the bottom of the second limiting groove, and the upper end of the reset spring is fixedly connected to the bottom surface of the driven rack, so that the device can be quickly reset.

[0012] A further improvement of the present invention is that the limiting protrusion is annular and surrounds the inner wall of the bottom limiting groove. The surface of the limiting strip is fixedly installed with a frosted layer that matches the limiting protrusion. Rotating shafts are fixedly installed at both ends of the buffer roller. The end of the rotating shaft away from the buffer roller is rotatably connected to the driven rack, thus providing stable limiting of the unloaded area of ​​the conveyor belt body.

[0013] A further improvement of the present invention is a protective device for mine conveyor belts, the usage steps of which are as follows:

[0014] A: Place the base frame inside the coal mine, connect the power supply, and drive the motor to rotate the rotating wheel, which in turn drives the transmission roller to rotate. The coal mined by the coal mining machine is poured onto the upper surface of the conveyor belt body and enters the receiving module through the transmission of the conveyor belt body. The two sides of the carrying area of ​​the conveyor belt body slide in the side clamps on the side of the two side baffles facing each other. The limiting strips on the inner side of the conveyor belt body slide in the side limiting grooves and the driven rack respectively. The limiting strips on the surface of the limiting roller and the limiting protrusions on the inner wall of the driven rack stabilize and limit the carrying area and the empty area of ​​the conveyor belt body to prevent it from slipping.

[0015] B: After step A is completed, the coal on the surface of the newly mined mine roadway in the coal mining area falls off under the vibration of the machinery and hits the upper surface of the input end of the conveyor belt body. Under the action of the kinetic energy of the coal, the bottom of the buffer frame of the conveyor belt body is pressed and slides on the inner surface of the chute. Under the action of the buffer spring inside the chute, part of the kinetic energy of the coal is offset, reducing the damage to the conveyor belt body.

[0016] C: While completing step B, if the kinetic energy of the coal is too high, the bottom of the buffer frame contacts the pressure bar on the upper surface of the sliding plate, generating downward pressure on the pressure bar. This causes the limiting ring on the side of the sliding plate to slide on the surface of the guide rail. The bottom of the active rack slides inside the first sliding groove. The active rack drives the driven rack to slide upward inside the second limiting groove through the meshing gear, which in turn drives the buffer roller to slide upward. Since the buffer roller contacts the unloaded area of ​​the conveyor belt body, the conveyor belt body is quickly relaxed, further reducing the damage to the conveyor belt body caused by large coal. The return spring can reset the device after buffering is completed.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Through the coordinated use of the connecting frame and buffer module, coal on the surface of the mine tunnel falls off under mechanical vibration and hits the upper surface of the input end of the conveyor belt. Under the action of the kinetic energy of the coal, the bottom of the buffer frame is pressed against the inner surface of the chute. Under the action of the buffer spring inside the chute, part of the kinetic energy of the coal is offset, reducing damage to the conveyor belt. At the same time, if the kinetic energy of the coal is too large, the bottom of the buffer frame contacts the pressure bar on the upper surface of the sliding plate, generating downward pressure on the pressure bar, causing the limiting ring on the side of the sliding plate to slide on the surface of the guide rail. The bottom of the active rack slides inside the first sliding groove. The active rack drives the driven rack to slide upward inside the second limiting groove through the meshing gear, thereby driving the buffer roller to slide upward. Since the buffer roller contacts the unloaded area of ​​the conveyor belt, the conveyor belt is quickly released, further reducing the damage of large coal to the conveyor belt. It has good safety and innovation.

[0019] 2. By using the buffer rollers in conjunction with the side clamps installed on the side baffles, the two sides of the load area of ​​the conveyor belt slide in the side clamps on the side facing the two side baffles. The limiting strips on the inside of the conveyor belt slide in the side limiting grooves and the driven rack, respectively. The limiting strips on the surface of the limiting rollers and the limiting protrusions on the inner wall of the driven rack provide stable limiting for the load area and the empty area of ​​the conveyor belt, preventing the conveyor belt from slipping due to collision with heavy objects. This provides all-round protection for the conveyor belt and has good safety and practicality. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a mine conveyor belt to which this invention is applicable.

[0021] Figure 2 This is a schematic diagram of the overall structure of a protective device for a mine conveyor belt according to the present invention.

[0022] Figure 3 This is a schematic front view of an overall protective device for a mine conveyor belt according to the present invention.

[0023] Figure 4 This is an internal schematic diagram of the connecting frame of a protective device for a mine conveyor belt according to the present invention.

[0024] Figure 5 This is a cross-sectional schematic diagram of a buffer module of a protective device for a mine conveyor belt according to the present invention.

[0025] Figure 6 This is a schematic diagram showing the connection between the driven rack and the buffer roller in a protective device for a mine conveyor belt according to the present invention.

[0026] In the diagram: 1. Base frame; 2. Receiving module; 3. Drive motor; 4. Transmission roller; 5. Conveyor belt body; 6. Support frame; 7. Side baffle; 8. Side clamp; 9. Support plate; 10. Buffer module; 11. Limiting roller; 12. Side limiting groove; 13. Connecting frame; 14. Buffer frame; 15. Slide groove; 16. Side connecting plate; 17. Buffer cavity; 18. Pressure roller; 19. Buffer roller; 20. Outer fixing ring; 21. Anti-slip protrusion; 22. Limiting strip; 23. Buffer spring; 24. Pressure rod; 25. Sliding plate; 26. Limiting ring; 27. Guide rail; 28. Active rack; 29. ​​No. 1 sliding groove; 30. No. 2 limiting groove; 31. Meshing gear; 32. Driven rack; 33. Bottom limiting groove; 34. Return spring; 35. Rotating shaft; 36. Limiting protrusion. Detailed Implementation

[0027] To facilitate understanding of the technical means, creative features, objectives, and effects of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "number one," "number two," "number three," and "number four" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The invention will be further described below in conjunction with specific embodiments.

[0028] Example 1

[0029] like Figure 1-6As shown, a mine conveyor belt includes a base frame (1), a receiving module (2), a conveyor belt body (5), a transmission roller (4), and a drive motor (3). A bracket (6) and a protective device are fixedly installed on the top of the base frame (1). The protective device includes a support plate (9) and a buffer module (10) installed in the middle of the base frame (1). The support plate (9) is fixedly installed on the top of the buffer module (10). Side baffles (7) are fixedly installed on the upper surface of the buffer module (10) and on both sides of the support plate (9). A row of grooves (15) is opened on the upper surface of the support plate (9). A buffer frame (14) is slidably connected to the inner surface of the groove (15). The upper end of the buffer frame (14) contacts the conveyor belt body (5). The inner bottom of the groove (15) is fixed. A buffer spring (23) is installed, the upper end of which is fixedly installed on the side of the buffer frame (14). A connecting frame (13) is fixedly installed at the bottom of the support plate (9). A sliding plate (25) is provided inside the connecting frame (13). A pressure rod (24) is fixedly installed at the upper end of the sliding plate (25). The upper end of the pressure rod (24) extends into the inside of the chute (15). An active rack (28) is fixedly installed on the lower surface of the sliding plate (25). In this way, the conveyor belt body (5) presses the bottom of the buffer frame (14) under the action of the kinetic energy of the coal and slides on the inner surface of the chute (15). Under the action of the buffer spring (23) inside the chute (15), a portion of the kinetic energy of the coal is offset, reducing the damage to the conveyor belt body (5).

[0030] The buffer module (10) has side connecting plates (16) and outer fixing rings (20) fixedly installed on both sides. The buffer module (10) has a buffer cavity (17) inside. The buffer module (10) has a pressure roller (18) and a buffer roller (19) inside. The two ends of the pressure roller (18) are fixedly connected to the two outer fixing rings (20) respectively. The two ends of the buffer roller (19) are fixedly installed with sliding grooves (15). The end of the sliding groove (15) facing away from the buffer roller (19) is rotatably connected to a driven rack (32). The side connecting plate (16) has a first sliding groove (29) and a second limiting groove (3) inside. 0), the side connecting plate (16) inside and between the first sliding groove (29) and the second limiting groove (30) turns to connect the meshing gear (31). One side of the meshing gear (31) meshes with the driving rack (28) for transmission. The outer surface of the driving rack (28) slides with the first sliding groove (29). The side of the meshing gear (31) away from the driving rack (28) meshes with the driven rack (32) for transmission. The outer surface of the driven rack (32) slides with the second limiting groove (30). In this way, the conveyor belt body (5) is quickly relaxed, further reducing the damage of large coal to the conveyor belt body (5).

[0031] In this embodiment, a side clamp (8) is fixedly installed on the opposite side of the two side baffles (7). A side limiting groove (12) is provided on the inner surface of the side clamp (8). A plurality of limiting rollers (11) are rotatably connected inside the side limiting groove (12). Anti-slip protrusions (21) are provided on the surface of the limiting rollers (11).

[0032] In this embodiment, limit strips (22) are fixedly installed on both sides of the inner surface of the conveyor belt body (5). The bottom surface of the limit strip (22) is slidably connected to the limit roller (11), and the side surface of the limit strip (22) slides inside the side limit groove (12).

[0033] In this embodiment, a bottom limiting groove (33) is provided on the surface of the buffer roller (19), and a limiting protrusion (36) is fixedly installed on the inner surface of the bottom limiting groove (33). The inner surface of the bottom limiting groove (33) is slidably connected to the limiting strip (22), and the bottom surface of the limiting strip (22) is in contact with the limiting protrusion (36).

[0034] In this embodiment, a limiting ring (26) is fixedly installed on the side of the sliding plate (25), and a guide rail (27) is fixedly installed inside the connecting frame (13) and on both sides of the sliding plate (25). The limiting ring (26) slides on the outer surface of the guide rail (27).

[0035] In this embodiment, a reset spring (34) is fixedly installed at the bottom of the second limiting groove (30), and the upper end of the reset spring (34) is fixedly connected to the bottom surface of the driven rack (32).

[0036] In this embodiment, the limiting protrusion (36) is annular and surrounds the inner wall of the bottom limiting groove (33). The surface of the limiting strip (22) is fixedly installed with a frosted layer that matches the limiting protrusion (36). Rotating shafts (35) are fixedly installed at both ends of the buffer roller (19). The end of the rotating shaft (35) away from the buffer roller (19) is rotatably connected to the driven rack (32).

[0037] This embodiment achieves the following: by using the connecting frame (13) and the buffer module (10) together, the coal on the surface of the mine roadway falls off under mechanical vibration and hits the upper surface of the input end of the conveyor belt body (5). Under the action of the kinetic energy of the coal, the bottom of the buffer frame (14) is pressed and slides on the inner surface of the chute (15). Under the action of the buffer spring (23) inside the chute (15), part of the kinetic energy of the coal is offset, reducing the damage to the conveyor belt body (5). At the same time, if the kinetic energy of the coal is too large, the bottom of the buffer frame (14) contacts the pressure bar (24) on the upper surface of the sliding plate (25). The pressure bar (24) exerts downward pressure, causing the limiting ring (26) on the side of the sliding plate (25) to slide on the surface of the guide rail (27). The bottom of the active rack (28) slides inside the first sliding groove (29). The active rack (28) drives the driven rack (32) to slide upward inside the second limiting groove (30) through the meshing gear (31), which in turn drives the buffer roller (19) to slide upward. Since the buffer roller (19) contacts the unloaded area of ​​the conveyor belt body (5), the conveyor belt body (5) is quickly relaxed, further reducing the damage of large coal to the conveyor belt body (5), which has good safety and creativity.

[0038] Example 2

[0039] like Figure 1-6 As shown, a mine conveyor belt includes a base frame (1), a receiving module (2), a conveyor belt body (5), a transmission roller (4), and a drive motor (3). A bracket (6) and a protective device are fixedly installed on the top of the base frame (1). The protective device includes a support plate (9) and a buffer module (10) installed in the middle of the base frame (1). The support plate (9) is fixedly installed on the top of the buffer module (10). Side baffles (7) are fixedly installed on the upper surface of the buffer module (10) and on both sides of the support plate (9). A row of grooves (15) is opened on the upper surface of the support plate (9). A buffer frame (14) is slidably connected to the inner surface of the groove (15). The upper end of the buffer frame (14) contacts the conveyor belt body (5). The inner bottom of the groove (15) is fixed. A buffer spring (23) is installed, the upper end of which is fixedly installed on the side of the buffer frame (14). A connecting frame (13) is fixedly installed at the bottom of the support plate (9). A sliding plate (25) is provided inside the connecting frame (13). A pressure rod (24) is fixedly installed at the upper end of the sliding plate (25). The upper end of the pressure rod (24) extends into the inside of the chute (15). An active rack (28) is fixedly installed on the lower surface of the sliding plate (25). In this way, the conveyor belt body (5) presses the bottom of the buffer frame (14) under the action of the kinetic energy of the coal and slides on the inner surface of the chute (15). Under the action of the buffer spring (23) inside the chute (15), a portion of the kinetic energy of the coal is offset, reducing the damage to the conveyor belt body (5).

[0040] The buffer module (10) has side connecting plates (16) and outer fixing rings (20) fixedly installed on both sides. The buffer module (10) has a buffer cavity (17) inside. The buffer module (10) has a pressure roller (18) and a buffer roller (19) inside. The two ends of the pressure roller (18) are fixedly connected to the two outer fixing rings (20) respectively. The two ends of the buffer roller (19) are fixedly installed with sliding grooves (15). The end of the sliding groove (15) facing away from the buffer roller (19) is rotatably connected to a driven rack (32). The side connecting plate (16) has a first sliding groove (29) and a second limiting groove (3) inside. 0), the side connecting plate (16) inside and between the first sliding groove (29) and the second limiting groove (30) turns to connect the meshing gear (31). One side of the meshing gear (31) meshes with the driving rack (28) for transmission. The outer surface of the driving rack (28) slides with the first sliding groove (29). The side of the meshing gear (31) away from the driving rack (28) meshes with the driven rack (32) for transmission. The outer surface of the driven rack (32) slides with the second limiting groove (30). In this way, the conveyor belt body (5) is quickly relaxed, further reducing the damage of large coal to the conveyor belt body (5).

[0041] In this embodiment, a side clamp (8) is fixedly installed on the opposite side of the two side baffles (7). A side limiting groove (12) is provided on the inner surface of the side clamp (8). A plurality of limiting rollers (11) are rotatably connected inside the side limiting groove (12). Anti-slip protrusions (21) are provided on the surface of the limiting rollers (11).

[0042] In this embodiment, limit strips (22) are fixedly installed on both sides of the inner surface of the conveyor belt body (5). The bottom surface of the limit strip (22) is slidably connected to the limit roller (11), and the side surface of the limit strip (22) slides inside the side limit groove (12).

[0043] In this embodiment, a bottom limiting groove (33) is provided on the surface of the buffer roller (19), and a limiting protrusion (36) is fixedly installed on the inner surface of the bottom limiting groove (33). The inner surface of the bottom limiting groove (33) is slidably connected to the limiting strip (22), and the bottom surface of the limiting strip (22) is in contact with the limiting protrusion (36).

[0044] In this embodiment, the limiting protrusion (36) is annular and surrounds the inner wall of the bottom limiting groove (33). The surface of the limiting strip (22) is fixedly installed with a frosted layer that matches the limiting protrusion (36). Rotating shafts (35) are fixedly installed at both ends of the buffer roller (19). The end of the rotating shaft (35) away from the buffer roller (19) is rotatably connected to the driven rack (32).

[0045] This embodiment achieves the following: by using the buffer roller (19) in conjunction with the side clamp (8) installed on the side baffle (7), the two sides of the loading area of ​​the conveyor belt body (5) slide in the side clamp (8) on the side facing the two side baffles (7). The limiting strip (22) on the inner side of the conveyor belt body (5) slides in the side limiting groove (12) and the driven rack (32) respectively. The limiting strip (22) on the surface of the limiting roller (11) and the limiting protrusion (36) on the inner wall of the driven rack (32) provide stable limiting for the loading area and the empty area of ​​the conveyor belt body (5), preventing the conveyor belt body (5) from slipping after being hit by heavy objects. It provides all-round protection for the conveyor belt body (5) and has good safety and practicality.

[0046] It should be noted that this invention is a protective device for a mine conveyor belt. In use, firstly, the base frame (1) is placed inside the coal mine, the power is turned on, and the drive motor (3) drives the rotating wheel to rotate, thereby driving the transmission roller (4) to rotate. The coal mined by the coal mining machine is poured onto the upper surface of the conveyor belt body (5) and enters the receiving module (2) through the transmission of the conveyor belt body (5). The two sides of the loading area of ​​the conveyor belt body (5) slide in the side clamp (8) on the side facing the two side baffles (7). (5) The inner limiting strips (22) slide inside the side limiting grooves (12) and the driven rack (32), respectively. The limiting strips (22) on the surface of the limiting roller (11) and the limiting protrusions (36) on the inner wall of the driven rack (32) stabilize and limit the load area and the unload area of ​​the conveyor belt body (5) to prevent it from slipping. Secondly, the coal on the surface of the newly mined mine roadway in the coal mining area falls off under the vibration of the machinery and hits the upper surface of the input end of the conveyor belt body (5). The conveyor belt body (5) is affected by the kinetic energy of the coal. The bottom of the downward-pressing buffer frame (14) slides on the inner surface of the chute (15). Under the action of the buffer spring (23) inside the chute (15), a portion of the kinetic energy of the coal is offset, reducing damage to the conveyor belt body (5). Finally, if the kinetic energy of the coal is too large, the bottom of the buffer frame (14) contacts the pressure rod (24) on the upper surface of the sliding plate (25), generating downward pressure on the pressure rod (24), causing the limiting ring (26) on the side of the sliding plate (25) to slide on the surface of the guide rail (27), and the active gear... The bottom of the rack (28) slides inside the first sliding groove (29). The active rack (28) drives the driven rack (32) to slide upward inside the second limiting groove (30) through the meshing gear (31), which in turn drives the buffer roller (19) to slide upward. Since the buffer roller (19) contacts the unloaded area of ​​the conveyor belt body (5), the conveyor belt body (5) is quickly relaxed, further reducing the damage of large coal to the conveyor belt body (5). The return spring (34) can reset the device after buffering.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A protective device for a mine conveyor belt, comprising a base frame, a receiving module, a conveyor belt body, a drive roller, and a drive motor, wherein a support frame and a protective device are fixedly installed on top of the base frame, characterized in that: The protective device includes a support plate and a buffer module installed in the middle of the base frame. The support plate is fixedly installed above the buffer module. Side baffles are fixedly installed on the upper surface of the buffer module and on both sides of the support plate. A row of sliding grooves is opened on the upper surface of the support plate. A buffer frame is slidably connected to the inner surface of the sliding groove. The upper end of the buffer frame is in contact with the conveyor belt body. A buffer spring is fixedly installed at the bottom of the sliding groove. The upper end of the buffer spring is fixedly installed on the side of the buffer frame. A connecting frame is fixedly installed at the bottom of the support plate. A sliding plate is provided inside the connecting frame. A pressure rod is fixedly installed at the upper end of the sliding plate. The upper end of the pressure rod extends into the interior of the sliding groove. An active rack is fixedly installed on the lower surface of the sliding plate. The buffer module is equipped with side connecting plates and outer fixing rings fixedly installed on both sides. A buffer cavity is formed inside the buffer module. A pressure roller and a buffer roller are installed inside the buffer module. The two ends of the pressure roller are fixedly connected to two outer fixing rings respectively. Slide grooves are fixedly installed at both ends of the buffer rollers. A driven rack is rotatably connected to the end of the slide groove opposite to the buffer roller. A first sliding groove and a second limiting groove are formed inside the side connecting plate. A meshing gear is rotatably connected inside the side connecting plate between the first sliding groove and the second limiting groove. One side of the meshing gear meshes with the driving rack. The outer surface of the driving rack is slidably connected to the first sliding groove. The side of the meshing gear away from the driving rack meshes with the driven rack. The outer surface of the driven rack is slidably connected to the second limiting groove. Side clamps are fixedly installed on the opposite side of the two side baffles. The inner surface of the side clamps is provided with side limiting grooves. Multiple limiting rollers are rotatably connected inside the side limiting grooves. Anti-slip protrusions are provided on the surface of the limiting rollers. Limiting strips are fixedly installed on both sides of the inner surface of the conveyor belt body. The bottom surface of the limiting strip is slidably connected to the limiting roller, and the side surface of the limiting strip slides inside the side limiting groove. The surface of the buffer roller is provided with a bottom limiting groove, and a limiting protrusion is fixedly installed on the inner surface of the bottom limiting groove. The inner surface of the bottom limiting groove is slidably connected with a limiting strip, and the bottom surface of the limiting strip is in contact with the limiting protrusion. The limiting protrusion is annular and surrounds the inner wall of the bottom limiting groove. The surface of the limiting strip is fixedly fitted with a frosted layer that matches the limiting protrusion. Rotating shafts are fixedly fitted at both ends of the buffer roller, and the end of the rotating shaft away from the buffer roller is rotatably connected to the driven rack.

2. A guard for a mine conveyor belt as claimed in claim 1 wherein: A limiting ring is fixedly installed on the side of the sliding plate, and a guide rail is fixedly installed inside the connecting frame on both sides of the sliding plate. The limiting ring slides on the outer surface of the guide rail.

3. A guard for a mine conveyor belt as claimed in claim 1 wherein: A reset spring is fixedly installed at the bottom of the second limiting groove, and the upper end of the reset spring is fixedly connected to the bottom surface of the driven rack.

4. A method of use of a guard for a mine conveyor belt, for a guard for a mine conveyor belt according to any one of claims 1-3, characterized in that: The usage steps are as follows: A: Place the base frame inside the coal mine, connect the power supply, and drive the motor to rotate the rotating wheel, which in turn drives the transmission roller to rotate. The coal mined by the coal mining machine is poured onto the upper surface of the conveyor belt body and enters the receiving module through the transmission of the conveyor belt body. The two sides of the carrying area of ​​the conveyor belt body slide in the side clamps on the side of the two side baffles facing each other. The limiting strips on the inner side of the conveyor belt body slide in the side limiting grooves and the driven rack respectively. The limiting strips on the surface of the limiting roller and the limiting protrusions on the inner wall of the driven rack stabilize and limit the carrying area and the empty area of ​​the conveyor belt body to prevent it from slipping. B: After step A is completed, the coal on the surface of the newly mined mine roadway in the coal mining area falls off under the vibration of the machinery and hits the upper surface of the input end of the conveyor belt body. Under the action of the kinetic energy of the coal, the bottom of the buffer frame of the conveyor belt body is pressed and slides on the inner surface of the chute. Under the action of the buffer spring inside the chute, part of the kinetic energy of the coal is offset, reducing the damage to the conveyor belt body. C: While completing step B, if the kinetic energy of the coal is too high, the bottom of the buffer frame contacts the pressure bar on the upper surface of the sliding plate, generating downward pressure on the pressure bar. This causes the limiting ring on the side of the sliding plate to slide on the surface of the guide rail. The bottom of the active rack slides inside the first sliding groove. The active rack drives the driven rack to slide upward inside the second limiting groove through the meshing gear, which in turn drives the buffer roller to slide upward. Since the buffer roller contacts the unloaded area of ​​the conveyor belt body, the conveyor belt body is quickly relaxed, further reducing the damage to the conveyor belt body caused by large coal. The return spring can reset the device after buffering is completed.

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