Mining telescopic belt conveyor

Abstract

The invention discloses a mining telescopic belt conveyor, and relates to the technical field of mineral transportation, the mining telescopic belt conveyor comprises a cabinet body, the surface of the cabinet body is rotatably provided with a cabinet door, the surface of the cabinet body is fixedly provided with a support frame, the bottom of the support frame is rotatably provided with universal wheels, the surface of the support frame is fixedly provided with a striker plate, and the striker plate is fixedly provided with a baffle plate. Servo motors are fixedly installed on the faces, away from each other, of the striker plates, the output ends of the servo motors rotationally penetrate through the inner walls and the outer walls of the striker plates, the two sliding plates are slidably installed on the faces, away from each other, of the striker plates, the number of the rolling shafts is two, one rolling shaft is rotationally installed between the striker plates, and the other rolling shaft is rotationally installed between the striker plates. The output end of the servo motor is fixedly installed on the surface of one rolling shaft, the conveying belt rotates to convey materials on the top of the conveying belt, operation is easy, the conveying belt can be rapidly stretched, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of mineral transportation, in particular to a telescopic belt conveyor for mining. Background Art

[0002] The mining retractable belt conveyor is a kind of equipment used in mining, construction and other heavy industrial fields. It is mainly used for the transportation and handling of materials. Its main features include retractability and belt conveyor.

[0003] The patent with patent announcement number CN204184887U relates to a retractable belt conveyor for mining, which relates to the field of coal mine transportation equipment, including a head drive device, a storage belt tensioning device, a fuselage and a transfer tail. A loading mechanism is provided between the storage belt tensioning device and the fuselage, and a unloading mechanism is provided between the fuselage and the transfer tail. The patent has a simple and reasonable structure, and improves and applies the retractable belt conveyor. During the excavation construction of the coal mine chute, the upper belt of the conveyor transports coal and slag out, and the lower belt transports the materials necessary for construction in, realizing dual use of one machine, which can greatly reduce work intensity and improve work efficiency.

[0004] In the above patent, during the excavation construction of the coal mine drift, the upper belt of the conveyor transports out coal and slag, and the lower belt transports the materials necessary for construction, realizing dual use of one machine, which can greatly reduce work intensity and improve work efficiency. However, when adjusting the conveyor belt, the stretched conveyor belt will become loose due to the change in tension, making it impossible for the conveyor belt to transport normally, affecting work efficiency. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a retractable belt conveyor for mining, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a retractable belt conveyor for mining, comprising a cabinet, a cabinet door is rotatably mounted on the surface of the cabinet, a support frame is fixedly mounted on the surface of the cabinet, a universal wheel is rotatably mounted on the bottom of the support frame, a baffle plate is fixedly mounted on the surface of the support frame, a vibrator is mounted on the surface of the baffle plate, a servo motor is fixedly mounted on one side of the baffle plate away from each other, the output end of the servo motor rotates and penetrates the inner and outer walls of the baffle plate, a conveying device is arranged on the surface of the cabinet, and a protective device and a reset device are arranged on the top of the cabinet;

[0007] Wherein, the conveying device includes: a rolling shaft, a conveyor belt, a triangular box, a guide wheel 1, a guide wheel 2, a winding wheel, a sliding plate, a handle, a fixed base and a connecting rod. The two sliding plates are slidably mounted on the side of the baffle plate away from each other. Two rolling shafts are provided, one of which is rotatably mounted between the baffle plates, the output end of the servo motor is fixedly mounted on the surface of one of the rolling shafts, and the other rolling shaft is rotatably mounted between the sliding plates. The conveyor belt is arranged on the circumferential surfaces of the two rolling shafts, the triangular box is fixedly mounted on the side of the cabinet away from the servo motor, the guide wheel 1 is rotatably mounted on the inner wall of the triangular box, and the guide wheel 2 is rotatably mounted on the inner wall of the triangular box. The winding wheel is slidably mounted on the inner wall of the triangular box, the handle is fixedly mounted on a side of the sliding plate away from the material baffle plate, the fixed base is rotatably mounted on the surface of the triangular box, the connecting rod slides through the inner and outer walls of the fixed base, one end of the connecting rod is rotatably mounted on a side of the sliding plate away from the material baffle plate, and the other end of the connecting rod is rotatably mounted on the surface of the winding wheel, so that the conveyor belt bypasses the bottom of the winding wheel, the movement of the sliding plate drives the rolling shaft to move, the movement of the rolling shaft drives the connecting rod to move, the movement of the connecting rod drives the winding wheel to slide to the top, the movement of the winding wheel drives the excess part of the conveyor belt to stretch, the conveyor belt will be blocked by the winding wheel when it is in the winding state, and the excess conveyor belt will be wound up.

[0008] According to the above technical solution, a square groove is provided on the surface of the triangular box, and once the conveyor belt contacts the guide wheel, the sliding track of the connecting rod is limited by the square groove.

[0009] According to the above technical scheme, the protective device includes: a hollow box, a reset telescopic rod, a square plate, a blocking plate, a command pad and a deformable spring sheet. The hollow box is fixedly installed on a side of the sliding plate away from the baffle plate, the reset telescopic rod is fixedly installed on the inner wall of the hollow box, the square plate is fixedly installed on the free end surface of the reset telescopic rod, the blocking plate is fixedly installed on the surface of the square plate, the command pad is slidably installed between the inner walls of the hollow box, and the deformable spring sheet is fixedly installed on a side of the baffle plate close to the hollow box. The movement of the square plate will drive the command pad to move away from the servo motor. The movement of the command pad will contact the deformable spring sheet. After the command pad contacts the deformable spring sheet, the deformable spring sheet will be deformed. After the deformation, the deformable spring sheet will rub against the command pad.

[0010] According to the above technical solution, the protective device also includes: a transmission plate and an arc plate, the transmission plate is fixedly mounted on a side of the baffle plate close to the hollow box, the arc plate is fixedly mounted on a side of the square plate close to the blocking plate, the movement of the square plate drives the blocking plate to move, and after the blocking plate moves, it no longer contacts the command plate, and the command plate is driven to move toward the outer wall of the hollow box through the reset of spring No. 1, and after the command plate moves, it no longer contacts the deformed spring.

[0011] According to the above technical solution, a No. 1 spring is arranged between the brake pad and the hollow box, the transmission plate is in contact with the arc plate, and the brake pad is reset by the No. 1 spring.

[0012] According to the above technical solution, a No. 2 spring is arranged inside the resetting telescopic rod, the brake plate contacts the deformable spring sheet, and the No. 2 spring drives the free end of the resetting telescopic rod to be reset.

[0013] According to the above technical scheme, the reset device includes: a U-shaped rod, an L-shaped plate, a rotating plate one, a rotating plate two and a limit plate, the U-shaped rod is fixedly installed on the inner wall of the hollow box, the L-shaped plate is rotatably installed on the circumferential surface of the U-shaped rod, the rotating plate one is fixedly installed on the side of the baffle plate close to the hollow box, the rotating plate two is rotatably installed on the surface of the rotating plate one, and the limit plate is fixedly installed on the bottom of the rotating plate one, the L-shaped plate will push the rotating plate two to rotate, and when the L-shaped plate moves in the direction of the servo motor, the rotating plate two is blocked by the limit plate, so that the rotating plate two cannot rotate.

[0014] According to the above technical solution, a torsion spring No. 1 is arranged between the rotating plate No. 2 and the rotating plate No. 1, and the rotating plate No. 2 contacts the L-shaped plate, and the rotating plate No. 2 is driven to reset by the torsion spring No. 1.

[0015] The present invention provides a retractable belt conveyor for mining, which has the following beneficial effects:

[0016] (1) In the present invention, the vibrator can make the conveyor belt vibrate when conveying coal, thereby improving the conveying effect of the conveyor belt on the coal. The movement of another rolling shaft can drive the conveyor belt to stretch, so that the stretching area of ​​the top of the conveyor belt is increased. The operation is simple, and the conveyor belt can be stretched quickly, which improves the work efficiency. The excess conveyor belt will be wound up to ensure that the tightness of the conveyor belt will not change due to the change in the spacing between the rolling shafts when the conveyor belt is stretched and wound up, thereby preventing the rolling shaft from being unable to effectively drive the conveyor belt after the tightness of the conveyor belt changes, thereby ensuring the stability of the device during operation.

[0017] (2) The invention uses a deformable spring sheet to rub against the brake pad after it is deformed, thereby increasing the resistance between the deformable spring sheet and the brake pad. When the conveyor belt is extended, the friction force increases, so that it can only be extended slowly. This prevents excessive weight from being placed on the top of the conveyor belt, which would cause increased inertia and damage to the equipment due to rapid movement. This improves the protection effect of the device. After the brake pad moves, it no longer contacts the deformable spring sheet, so that after the conveyor belt is stretched to the farthest point, the devices no longer rub against each other. This prevents excessive resistance from causing excessive effort when winding up, thereby improving practicality.

[0018] (3) In the present invention, the rotation of the L-shaped plate drives the command plate to move in the direction of the deformable spring plate. After the command plate moves, it contacts the blocking plate, so that the command plate is limited by the blocking plate again, so that the device is restored to its initial state, and the protective work is not hindered again, thereby improving the practicality of the device. By blocking the rotating plate 2 by the limiting plate, the rotating plate 2 cannot rotate, so that the rotating plate 2 will push the L-shaped plate to rotate, thereby improving the continuity and work efficiency of the device during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the positional relationship between the square slot and the triangular box of the present invention;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the triangular box of the present invention;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the hollow box of the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the protective device of the present invention;

[0024] Figure 6 This is a schematic diagram of the reset structure of the present invention;

[0025] Figure 7 For the present invention Figure 6 A schematic diagram of the enlarged structure of part A.

[0026] In the figure: 1. cabinet body; 2. cabinet door; 3. support frame; 4. universal wheel; 5. material blocking plate; 6. servo motor; 71. rolling shaft; 72. conveyor belt; 73. triangular box; 74. guide wheel one; 75. guide wheel two; 76. winding wheel; 77. sliding plate; 78. handle; 79. fixed base; 710. connecting rod; 81. hollow box; 82. resetting telescopic rod; 83. square plate; 84. blocking plate; 85. brake pad; 86. No. 1 spring; 87. deformation spring; 88. transmission plate; 89. arc plate; 91. U-shaped rod; 92. L-shaped plate; 93. rotating plate one; 94. rotating plate two; 95. limit plate. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 7 , one embodiment of the present invention is: a retractable belt conveyor for mining, comprising a cabinet 1, a cabinet door 2 is rotatably mounted on the surface of the cabinet 1, a support frame 3 is fixedly mounted on the surface of the cabinet 1, a universal wheel 4 is rotatably mounted on the bottom of the support frame 3, a baffle plate 5 is fixedly mounted on the surface of the support frame 3, a vibrator is mounted on the surface of the baffle plate 5, a servo motor 6 is fixedly mounted on the side of the baffle plate 5 away from each other, the output end of the servo motor 6 rotates and penetrates the inner and outer walls of the baffle plate 5, a conveying device is arranged on the surface of the cabinet 1, and the conveying device comprises: a rolling shaft 71, a conveyor belt 72, a triangular The box 73, the guide wheel 1 74, the guide wheel 2 75, the winding wheel 76, the sliding plate 77, the handle 78, the fixed base 79 and the connecting rod 710, the two sliding plates 77 are slidably mounted on the side of the baffle plate 5 away from each other, and two rolling shafts 71 are provided, one of which is rotatably mounted between the baffle plates 5, the output end of the servo motor 6 is fixedly mounted on the surface of one of the rolling shafts 71, and the other rolling shaft 71 is rotatably mounted between the sliding plates 77, the conveyor belt 72 is arranged on the circumferential surface of the two rolling shafts 71, and the triangular box 73 is fixedly mounted on the cabinet 1 away from the servo motor 6. On one side of the service motor 6, the guide wheel 1 74 is rotatably mounted on the inner wall of the triangular box 73, the guide wheel 2 75 is rotatably mounted on the inner wall of the triangular box 73, the winding wheel 76 is slidably mounted on the inner wall of the triangular box 73, and the handle 78 is fixedly mounted on the side of the sliding plate 77 away from the baffle plate 5, so that the extension area of ​​the top of the conveyor belt 72 is increased, the operation is simple, and the conveyor belt 72 can be quickly extended, which improves the work efficiency. The fixed base 79 is rotatably mounted on the surface of the triangular box 73, and the connecting rod 710 slides through the inner and outer walls of the fixed base 79. One end of the connecting rod 710 rotates It is installed on the side of the sliding plate 77 away from the material baffle plate 5, and the other end of the connecting rod 710 is rotatably installed on the surface of the winding wheel 76 to ensure that the tightness of the conveyor belt 72 will not change due to the change in the spacing between the rolling shafts 71 when the conveyor belt 72 is extended and wound, and the change in the tightness of the conveyor belt 72 will prevent the rolling shaft 71 from being unable to effectively transmit the conveyor belt 72, thereby ensuring the stability of the device during operation. The vibrator can drive the conveyor belt 72 to vibrate, so that the conveyor belt 72 can produce small-amplitude movement when transporting coal.

[0029] A square groove is formed on the surface of the triangular box 73, and the conveyor belt 72 contacts the guide wheel 1 74, and the sliding track of the connecting rod 710 is limited by the square groove.

[0030] When the present embodiment is working, the servo motor 6 is started, and the rotation of the output end of the servo motor 6 drives one of the rolling shafts 71 to rotate, and the rotation of the rolling shaft 71 drives the conveyor belt 72 to rotate, and the rotation of the conveyor belt 72 transports the material on the top of the conveyor belt 72, and the handle 78 is manually pulled, and the movement of the handle 78 drives the sliding plate 77 to move away from the servo motor 6, and the movement of the sliding plate 77 drives another rolling shaft 71 to move away from the servo motor 6, and the movement of the other rolling shaft 71 drives the conveyor belt 72 to stretch, so that the stretching area of ​​the top of the conveyor belt 72 is increased, and the operation is simple, and the conveyor belt 72 can be quickly stretched, thereby improving the working efficiency. After the conveyor belt 72 moves, it will be guided by the guide wheel 1 74 and the guide wheel 2 The obstruction of 75 causes the conveyor belt 72 to bypass the bottom of the take-up wheel 76. The movement of the sliding plate 77 drives the rolling shaft 71 to move. The movement of the rolling shaft 71 drives the connecting rod 710 to move. The movement of the connecting rod 710 drives the take-up wheel 76 to slide to the top. The movement of the take-up wheel 76 drives the excess portion of the conveyor belt 72 to stretch. The conveyor belt 72 is blocked by the take-up wheel 76 when it is in the reeling state, and the excess conveyor belt 72 is reeled up, ensuring that the conveyor belt 72 will not change in tightness due to the change in the spacing between the rolling shafts 71 when the conveyor belt 72 is stretched and reeled up, preventing the change in tightness of the conveyor belt 72 from causing the rolling shaft 71 to be unable to effectively transmit the conveyor belt 72, thereby ensuring the stability of the device during operation.

[0031] See also Figure 1-Figure 7 On the basis of the above embodiment, in another embodiment of the present invention, a protective device and a reset device are provided on the top of the cabinet 1, wherein the protective device comprises: a hollow box 81, a reset telescopic rod 82, a square plate 83, a blocking plate 84, a pad 85 and a deformable spring piece 87. The hollow box 81 is fixedly installed with a side of the sliding plate 77 away from the baffle plate 5, the reset telescopic rod 82 is fixedly installed on the inner wall of the hollow box 81, the square plate 83 is fixedly installed on the free end surface of the reset telescopic rod 82, the blocking plate 84 is fixedly installed on the surface of the square plate 83, the pad 85 is slidably installed between the inner walls of the hollow box 81, and the deformable spring piece 87 is fixedly installed on a side of the baffle plate 5 close to the hollow box 81, so that the resistance between the deformable spring piece 87 and the pad 85 is increased, so that when the conveyor belt 72 is extended, it can only be extended slowly due to the increased friction force, so as to prevent the inertia from increasing when too heavy goods are placed on the top of the conveyor belt 72, causing damage to the equipment, thereby improving the protection effect of the device.

[0032] The protective device also includes: a transmission plate 88 and an arc plate 89. The transmission plate 88 is fixedly mounted on a side of the baffle plate 5 close to the hollow box 81, and the arc plate 89 is fixedly mounted on a side of the square plate 83 close to the blocking plate 84, so that after the conveyor belt 72 is stretched to the farthest point, the devices no longer rub against each other, preventing excessive resistance during winding that causes excessive effort, thereby improving practicality.

[0033] A No. 1 spring 86 is provided between the brake pad 85 and the hollow box 81 , and the transmission plate 88 is in contact with the arc plate 89 , and the brake pad 85 is driven to reset by the No. 1 spring 86 .

[0034] A second spring is provided inside the resetting telescopic rod 82 to make the plate 85 contact with the deformable elastic plate 87, and the free end of the resetting telescopic rod 82 is driven by the second spring to be reset.

[0035] The reset device includes: a U-shaped rod 91, an L-shaped plate 92, a rotating plate 1 93, a rotating plate 2 94 and a limiting plate 95. The U-shaped rod 91 is fixedly mounted on the inner wall of the hollow box 81, the L-shaped plate 92 is rotatably mounted on the circumferential surface of the U-shaped rod 91, the rotating plate 1 93 is fixedly mounted on a side of the baffle plate 5 close to the hollow box 81, and the rotating plate 2 94 is rotatably mounted on the surface of the rotating plate 1 93, so that the coming plate 85 is limited by the blocking plate 84 again, so that the device is restored to its initial state, does not hinder the protection work from being performed again, and improves the practicality of the device. The limiting plate 95 is fixedly mounted on the bottom of the rotating plate 1 93, so that the rotating plate 2 94 will push the L-shaped plate 92 to rotate, thereby improving the continuity and work efficiency of the device during operation.

[0036] A torsion spring No. 1 is arranged between the rotating plate No. 2 94 and the rotating plate No. 1 93. The rotating plate No. 2 94 contacts the L-shaped plate 92, and the rotating plate No. 2 94 is driven to reset by the torsion spring No. 1.

[0037] When the present embodiment is working, the movement of the sliding plate 77 will drive the hollow box 81 to move, and the movement of the hollow box 81 will drive the reset telescopic rod 82 to move in the direction away from the servo motor 6, and the movement of the reset telescopic rod 82 in the direction away from the servo motor 6 will drive the square plate 83 to move in the direction away from the servo motor 6, and the movement of the square plate 83 will drive the brake pad 85 to move in the direction away from the servo motor 6, and the movement of the brake pad 85 will contact the deformed elastic sheet 87, and the deformed elastic sheet 87 will be deformed after the brake pad 85 contacts the deformed elastic sheet 87, and the deformed elastic sheet 87 will rub against the brake pad 85 after the deformation, so that the resistance between the deformed elastic sheet 87 and the brake pad 85 is increased, so that when the conveyor belt 72 is stretched, it can only be stretched slowly due to the increased friction, so as to prevent the conveyor belt 72 from being stretched during the conveying When too heavy goods are placed on the top of the belt 72, rapid movement will increase the inertia and cause damage to the equipment, thereby improving the protection effect of the device. The movement of the square plate 83 will drive the arc plate 89 to move away from the servo motor 6. The movement of the arc plate 89 will contact the transmission plate 88, and the transmission plate 88 will push the square plate 83 to move in the direction of resetting the telescopic rod 82. The movement of the square plate 83 drives the blocking plate 84 to move. After the blocking plate 84 moves, it no longer contacts the brake pad 85. The No. 1 spring 86 is reset to drive the brake pad 85 to move toward the outer wall of the hollow box 81. After the brake pad 85 moves, it no longer contacts the deformable spring piece 87, so that after the conveyor belt 72 is stretched to the farthest point, the devices no longer rub against each other, preventing excessive resistance from causing excessive effort during winding, thereby improving practicality.

[0038] After the brake pad 85 moves, it will push the L-shaped plate 92 to rotate. The movement of the hollow box 81 will drive the U-shaped rod 91 to move in the direction of the servo motor 6. The movement of the U-shaped rod 91 will drive the L-shaped plate 92 to move in the direction of the servo motor 6. The movement of the L-shaped plate 92 will contact the rotating plate 2 94. The movement of the rotating plate 2 94 will push the L-shaped plate 92 to rotate. The rotation of the L-shaped plate 92 will drive the brake pad 85 to move in the direction of the deformable spring piece 87. After the brake pad 85 moves, it will contact the blocking plate 84, so that the brake pad 85 is re-engaged. The blocking plate 84 is limited so that the device returns to its initial state, does not hinder the protective work from being performed again, and improves the practicability of the device. When the L-shaped plate 92 moves in the direction away from the servo motor 6, the L-shaped plate 92 will push the rotating plate 2 94 to rotate. When the L-shaped plate 92 moves in the direction of the servo motor 6, the rotating plate 2 94 is blocked by the limiting plate 95, so that the rotating plate 2 94 cannot rotate, so that the rotating plate 2 94 will push the L-shaped plate 92 to rotate, thereby improving the continuity of the device during operation and work efficiency.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A retractable belt conveyor for mining, comprising a cabinet (1), characterized in that: The cabinet door (2) is rotatably mounted on the surface of the cabinet (1), a support frame (3) is fixedly mounted on the surface of the cabinet (1), a universal wheel (4) is rotatably mounted on the bottom of the support frame (3), a material baffle plate (5) is fixedly mounted on the surface of the support frame (3), a vibrator is mounted on the surface of the material baffle plate (5), a servo motor (6) is fixedly mounted on the side of the material baffle plate (5) away from each other, the output end of the servo motor (6) rotates through the inner and outer walls of the material baffle plate (5), a conveying device is arranged on the surface of the cabinet (1), and a protective device and a reset device are arranged on the top of the cabinet (1); The conveying device comprises: a rolling shaft (71), a conveyor belt (72), a triangular box (73), a guide wheel 1 (74), a guide wheel 2 (75), a winding wheel (76), a sliding plate (77), a handle (78), a fixed base (79) and a connecting rod (710), wherein the two sliding plates (77) are both slidably mounted on a side of the baffle plate (5) away from each other, two rolling shafts (71) are provided, one of the rolling shafts (71) is rotatably mounted between the baffle plates (5), the output end of the servo motor (6) is fixedly mounted on the surface of one of the rolling shafts (71), and the other rolling shaft (71) is rotatably mounted between the sliding plates (77), the conveyor belt (72) is arranged on the circumferential surface of the two rolling shafts (71), and the triangular box (78) is arranged on the circumferential surface of the two rolling shafts (71). (73) is fixedly mounted on a side of the cabinet (1) away from the servo motor (6), the guide wheel 1 (74) is rotatably mounted on the inner wall of the triangle box (73), the guide wheel 2 (75) is rotatably mounted on the inner wall of the triangle box (73), the winding wheel (76) is slidably mounted on the inner wall of the triangle box (73), the handle (78) is fixedly mounted on a side of the sliding plate (77) away from the material baffle plate (5), the fixed base (79) is rotatably mounted on the surface of the triangle box (73), the connecting rod (710) slides through the inner and outer walls of the fixed base (79), one end of the connecting rod (710) is rotatably mounted on a side of the sliding plate (77) away from the material baffle plate (5), and the other end of the connecting rod (710) is rotatably mounted on the surface of the winding wheel (76).

2. A retractable belt conveyor for mining according to claim 1, characterized in that: A square groove is formed on the surface of the triangular box (73), and the conveyor belt (72) is in contact with a guide wheel (74).

3. A retractable belt conveyor for mining according to claim 2, characterized in that: The protective device comprises: a hollow box (81), a resetting telescopic rod (82), a square plate (83), a blocking plate (84), a brake pad (85) and a deformable spring piece (87); the hollow box (81) is fixedly mounted on a side of the sliding plate (77) away from the material blocking plate (5); the resetting telescopic rod (82) is fixedly mounted on the inner wall of the hollow box (81); the square plate (83) is fixedly mounted on the free end surface of the resetting telescopic rod (82); the blocking plate (84) is fixedly mounted on the surface of the square plate (83); the brake pad (85) is slidably mounted between the inner walls of the hollow box (81); and the deformable spring piece (87) is fixedly mounted on a side of the material blocking plate (5) close to the hollow box (81).

4. A retractable belt conveyor for mining according to claim 3, characterized in that: The protective device further comprises: a transmission plate (88) and an arc plate (89), wherein the transmission plate (88) is fixedly mounted on a side of the material blocking plate (5) close to the hollow box (81), and the arc plate (89) is fixedly mounted on a side of the square plate (83) close to the blocking plate (84).

5. A retractable belt conveyor for mining according to claim 4, characterized in that: A No. 1 spring (86) is arranged between the brake pad (85) and the hollow box (81), and the transmission plate (88) is in contact with the arc plate (89).

6. A retractable belt conveyor for mining according to claim 5, characterized in that: A No. 2 spring is arranged inside the resetting telescopic rod (82), and the brake pad (85) is in contact with the deformable spring sheet (87).

7. A retractable belt conveyor for mining according to claim 6, characterized in that: The reset device comprises: a U-shaped rod (91), an L-shaped plate (92), a rotating plate one (93), a rotating plate two (94) and a limiting plate (95); the U-shaped rod (91) is fixedly mounted on the inner wall of the hollow box (81); the L-shaped plate (92) is rotatably mounted on the circumferential surface of the U-shaped rod (91); the rotating plate one (93) is fixedly mounted on a surface of the baffle plate (5) close to the hollow box (81); the rotating plate two (94) is rotatably mounted on the surface of the rotating plate one (93); and the limiting plate (95) is fixedly mounted on the bottom of the rotating plate one (93).

8. A retractable belt conveyor for mining according to claim 7, characterized in that: A torsion spring No. 1 is arranged between the second rotating plate (94) and the first rotating plate (93), and the second rotating plate (94) is in contact with the L-shaped plate (92).

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