Conveyor constant tension buffer protection device

Abstract

The present invention provides a conveyor constant tension buffer protection device applied to the field of conveyor technology, including a frame structure, the frame structure includes a pair of support legs and a pair of side plates fixedly installed at the upper ends thereof, a pair of anti-skid components are rotatably connected between the pair of side plates and at both ends thereof, a conveyor belt is wound around the outside of the anti-skid component, the anti-skid component and the conveyor belt form an attachment area and a detachment area, a plurality of reserved grooves corresponding to the positions of the installation grooves are opened on the outer wall of the main shaft, an electromagnetic sheet is used to generate a strong magnetic field to generate suction to the magnetic block inside the clamping claw, so that the clamping claw located in the attachment area cooperates with the rotating bar to clamp and fix the conveyor belt, at this time, the main motor is started, the main motor drives the anti-skid component to rotate, the conveyor belt and the anti-skid component move synchronously, when the conveyor belt and the anti-skid component leave the attachment area and enter the detachment area, the corresponding electromagnetic sheet generates a magnetic field that repels the magnetic block, so that the clamping claw is promptly detached from the contact with the conveyor belt.

Description

Technical Field

[0001] The present application relates to the technical field of conveyors, and in particular to a constant tension buffer protection device for conveyors. Background Art

[0002] A conveyor is a material handling machine that continuously transports materials along a certain route, also known as a continuous conveyor. Conveyors can be used for horizontal, inclined and vertical transportation, and can also form spatial transportation routes. The transportation route is generally fixed. Conveyors have large transportation capacity and long transportation distances. They can also complete several process operations simultaneously during the transportation process, and are widely used.

[0003] The transmission mode of belt conveyor belongs to belt transmission in flexible transmission. The conveyor belt is a viscoelastic body made of rubber and its synthetic materials. This transmission mode has the characteristics of easy slippage, unstable transmission ratio and short conveyor belt life. Especially when the machine is just started, it is very easy to slip between the conveyor belt and the roller, which will not only produce harsh noise but also damage the conveyor belt. In order to solve this problem, the general method is to increase the tension of the conveyor belt before starting, thereby increasing the friction between the conveyor belt and the roller and reducing the occurrence of slippage. However, frequent tensioning and relaxation will cause irreparable damage to the conveyor belt.

[0004] In this regard, we tried to clamp the conveyor belt at startup so that it rotates synchronously with the roller, thereby avoiding slippage between the conveyor belt and the roller, extending the service life of the conveyor belt, and proposed a constant tension buffer protection device for the conveyor. Summary of the invention

[0005] The purpose of the present application is to reduce the slippage between the conveyor belt and the roller shaft and improve the protection of the conveyor belt. Compared with the prior art, a constant tension buffer protection device for a conveyor is provided, including a frame structure, the frame structure includes a pair of support legs and a pair of side plates fixedly installed at the upper ends thereof, a pair of anti-skid components are rotatably connected between the pair of side plates and at both ends thereof, a conveyor belt is wrapped around the outside of the anti-skid component, and the anti-skid component and the conveyor belt form an attachment area and a detachment area, the anti-skid component includes a main shaft and side plates fixedly connected at both ends thereof, the side plates are provided with a plurality of mounting grooves near the side walls of the main shaft, a plurality of reserved grooves corresponding to the positions of the mounting grooves are provided on the outer wall of the main shaft, a rotating bar is arranged inside the reserved groove, a clamping claw is rotatably connected inside the mounting groove, a magnetic block is arranged inside the clamping claw, an electromagnetic sheet is arranged inside the rotating bar, a main motor corresponding to the position of the side plate is fixedly connected to the outer wall of the side plate, an output end of the main motor passes through the side plate and is fixedly connected to the side plate, and the electromagnetic sheet and the main motor are electrically connected to an external controller.

[0006] Before starting the conveyor, under the control of an external controller, an electromagnetic sheet is used to generate a strong magnetic field to generate suction to the magnetic block inside the clamping claw, so that the clamping claw located in the attachment area cooperates with the rotating bar to clamp and fix the conveyor belt. At this time, the main motor is started, and the main motor drives the anti-slip component to rotate, and the conveyor belt and the anti-slip component move synchronously. When the conveyor belt and the anti-slip component leave the attachment area and enter the separation area, the corresponding electromagnetic sheet generates a magnetic field that repels the magnetic block, so that the clamping claw is promptly separated from the contact with the conveyor belt to avoid affecting the movement of the conveyor belt.

[0007] Furthermore, a sliding groove is provided on a side wall of the clamping claw close to the main shaft, the magnetic block is slidably connected inside the sliding groove, and a friction component is fixedly connected to a side wall of the magnetic block close to the main shaft.

[0008] Furthermore, the friction assembly includes a plurality of extrusion rings whose diameters increase successively from the inside to the outside, and two adjacent extrusion rings are fixedly connected by a connecting sleeve, and the extrusion ring away from the magnetic block is fixedly connected to the opening of the sliding groove. The electromagnetic sheet is used to attract the magnetic block so that the magnetic block can push the extrusion ring to move outside the sliding groove until it is attached to and squeezed on the surface of the conveyor belt. At this time, the extrusion rings whose diameters increase successively are embedded in each other at the opening of the sliding groove to form an overall friction layer.

[0009] Furthermore, the extrusion ring is made of rubber material and the connecting sleeve is made of breathable fiber. The two adjacent extrusion rings are tightly attached to each other in a closed state, and an annular sealing groove is formed between the tightly attached parts. After being squeezed, the annular sealing groove discharges the gas inside and a negative pressure is formed inside the annular sealing groove, thereby further improving the adsorption force on the conveyor belt.

[0010] Furthermore, a servo motor is embedded in a side wall of the main shaft close to the side plate, and a working cavity corresponding to the position of the servo motor is opened inside the side plate, the output end of the servo motor extends into the working cavity and is fixedly connected to a gear ring, the rotating bar includes a hard extrusion flap, a flexible extrusion flap is fixedly connected to the bottom wall of the hard extrusion flap, a rotating shaft is connected through the middle of the hard extrusion flap, the rotating shaft extends into the working cavity and is fixedly connected to a gear, the gear and the servo motor are meshingly connected, and the servo motor is electrically connected to an external controller. When the conveyor runs for a long time, the temperature of the conveyor belt gradually rises, causing its length to extend due to thermal expansion and contraction. At this time, the servo motor is rotated to drive the gear ring and the gear to rotate, thereby controlling the rotation of the rotating bar, so that the thicker flexible extrusion flap is flipped to the outside to contact the conveyor belt, and the extended part of the conveyor belt is stretched open by the flexible extrusion flap, thereby avoiding the conveyor belt from slipping due to being too long.

[0011] Furthermore, a liquid storage cavity is provided inside the flexible extrusion flap, and the liquid storage cavity is filled with a buffer solution, and a fluorescent agent is added to the buffer solution. The buffer solution can improve the buffering capacity of the flexible extrusion flap, and the fluorescent agent can promptly remind the staff when leakage occurs in the flexible extrusion flap.

[0012] Furthermore, a cleaning layer is attached to the outer wall of the flexible extrusion flap, and the cleaning layer is made of artificial fiber material. After the conveyor belt is slightly loosened by using the adjustment component, the clamping claw of the anti-slip component at one end is kept in a working state, and the anti-slip component at the other end remains stationary. At this time, the conveyor belt will rub against the stationary flexible extrusion flap, and the cleaning layer outside the flexible extrusion flap can clean the surface of the conveyor belt.

[0013] Furthermore, the outer wall of the hard extruded valve is tightly and smoothly connected to the outer wall of the main shaft.

[0014] Furthermore, an adjustment component is fixedly connected to the lower end of a pair of side plates, and the adjustment component includes roller shaft 2. A pair of roller shafts 1 corresponding to the position of roller shaft 2 are rotatably connected between the pair of side plates. The conveyor belt is wound around the outer walls of roller shaft 1 and roller shaft 2. Both ends of roller shaft 2 are fixedly connected to a top plate through a bracket, and the lower end of the top plate is fixedly connected to a bottom plate through a hydraulic lifting rod. Both ends of the bottom plate are fixedly connected to the bottom of the side plate through a connecting plate. The hydraulic lifting rod is also electrically connected to an external controller. A wide range of tension adjustment can be achieved by using the hydraulic lifting rod to push and pull the top plate to control the rise or fall of roller shaft 2, thereby achieving length adjustment of the conveyor belt.

[0015] Compared with the prior art, the advantages of this application are:

[0016] (1) Before starting the conveyor, under the control of an external controller, an electromagnetic sheet is used to generate a strong magnetic field to generate suction to the magnetic block inside the clamping claw, so that the clamping claw in the attachment area cooperates with the rotating bar to clamp and fix the conveyor belt. At this time, the main motor is started, and the main motor drives the anti-skid component to rotate. The conveyor belt and the anti-skid component move synchronously. When the conveyor belt and the anti-skid component leave the attachment area and enter the separation area, the corresponding electromagnetic sheet generates a magnetic field that repels the magnetic block, so that the clamping claw is separated from the contact with the conveyor belt in time to avoid affecting the movement of the conveyor belt.

[0017] (2) The electromagnetic sheet is used to attract the magnetic block so that the magnetic block can push the extrusion ring to move outside the sliding groove until it adheres to and is pressed against the surface of the conveyor belt. At this time, the extrusion rings with increasing diameters are embedded in each other at the opening of the sliding groove to form an integral friction layer.

[0018] (3) When two adjacent extrusion rings are closed, they are tightly attached to each other. An annular sealing groove is formed between the tightly attached extrusion rings. After being squeezed, the annular sealing groove discharges the gas inside it and forms a negative pressure inside it, further improving the adsorption force on the conveyor belt.

[0019] (4) After the conveyor has been running for a long time, the temperature of the conveyor belt gradually rises, causing its length to extend due to thermal expansion and contraction. At this time, the servo motor is used to flip the thicker flexible extrusion flap to the outside to contact the conveyor belt. The extended part of the conveyor belt is stretched open by the flexible extrusion flap, avoiding the situation where the conveyor belt is too long and slips.

[0020] (5) After slightly loosening the conveyor belt using the adjustment component, keep the clamping claw of the anti-slip component at one end in working state, and keep the anti-slip component at the other end stationary. At this time, the conveyor belt will rub against the stationary flexible extrusion flap, and the cleaning layer outside the flexible extrusion flap can clean the surface of the conveyor belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the main structure of this application;

[0022] Figure 2 This is a schematic diagram of the main body explosion of this application;

[0023] Figure 3 This is a schematic diagram of an explosion of the anti-skid assembly of the present application;

[0024] Figure 4 This is a schematic diagram of the clamping claw structure of the present application;

[0025] Figure 5 It is a schematic diagram of a partial cross-sectional structure of the clamping claw of the present application in a relaxed state;

[0026] Figure 6 It is a schematic diagram of a partial cross-sectional structure of the clamping claw of the present application in a clamping state;

[0027] Figure 7 This is a schematic diagram of the rotating bar structure of the present application;

[0028] Figure 8 This is a schematic diagram of a partial cross-sectional structure of the anti-skid assembly of the present application in a working state;

[0029] Fig. 9 This is a schematic cross-sectional structure diagram of the anti-skid assembly of the present application in a working state;

[0030] Fig.10 This is a schematic diagram of the structure of the anti-skid assembly of the present application in a working state;

[0031] Fig.11 This is a schematic diagram of the structure of the regulating component of this application.

[0032] Description of the numbers in the figure:

[0033] 1. Frame structure; 11. Support legs; 12. Side panels; 13. Roller shaft one; 2. Conveyor belt; 3. Anti-skid assembly; 31. Main shaft; 311. Reserved groove; 32. Side plate; 321. Mounting groove; 322. Working chamber; 33. Clamping claw; 331. Sliding groove; 332. Extrusion ring; 333. Connecting sleeve; 34. Rotating bar; 341. Hard extrusion flap; 342. Rotating shaft; 343. Flexible extrusion flap; 35. Gear; 36. Gear ring; 37. Servo motor; 4. Adjustment assembly; 41. Bottom plate; 42. Connecting plate; 43. Top plate; 44. Roller shaft two; 45. Hydraulic lifting rod. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of the adapter model component. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Example 1: The present invention provides a conveyor constant tension buffer protection device, please refer to Figure 1-Figure 3, including a frame structure 1, the frame structure 1 includes a pair of supporting legs 11 and a pair of side plates 12 fixedly installed at the upper ends thereof, a pair of anti-skid components 3 are rotatably connected between the pair of side plates 12 and at both ends thereof, a conveyor belt 2 is wound around the outside of the anti-skid component 3, and the anti-skid component 3 forms an attachment area and a detachment area with the conveyor belt 2, the anti-skid component 3 includes a main shaft 31 and side plates 32 fixedly connected at both ends thereof, a plurality of mounting grooves 321 are provided on the side wall of the side plate 32 near the main shaft 31, a plurality of reserved grooves 311 corresponding to the positions of the mounting grooves 321 are provided on the outer wall of the main shaft 31, a rotating bar 34 is arranged inside the reserved groove 311, a clamping claw 33 is rotatably connected inside the mounting groove 321, a magnetic block is arranged inside the clamping claw 33, an electromagnetic sheet is arranged inside the rotating bar 34, a main motor corresponding to the position of the side plate 32 is fixedly connected to the outer wall of the side plate 12, an output end of the main motor passes through the side plate 12 and is fixedly connected to the side plate 32, and the electromagnetic sheet and the main motor are both electrically connected to an external controller.

[0038] For details, please refer to Figure 1-Figure 3 and Fig.10 Before starting the conveyor, under the control of the external controller, the electromagnetic sheet is used to generate a strong magnetic field to generate suction to the magnetic block inside the clamping claw 33, so that the clamping claw 33 located in the attachment area cooperates with the rotating bar 34 to clamp and fix the conveyor belt 2. At this time, the main motor is started, and the main motor drives the anti-skid component 3 to rotate, and the conveyor belt 2 and the anti-skid component 3 move synchronously. When the conveyor belt 2 and the anti-skid component 3 leave the attachment area and enter the separation area, the corresponding electromagnetic sheet generates a magnetic field that repels the magnetic block, so that the clamping claw 33 is promptly separated from the contact with the conveyor belt 2 to avoid affecting the movement of the conveyor belt 2. While maintaining a constant tension of the conveyor belt 2, the conveyor belt 2 and the anti-skid component 3 are started synchronously without increasing the tension, which effectively reduces the wear of the conveyor belt 2, extends the service life of the conveyor belt 2, and reduces the generation of noise.

[0039] It should be added here that the magnetic field direction of the electromagnetic sheet is automatically adjusted by an external controller, and the external controller adopts a PLC circuit system, which has a built-in circuit regulation control algorithm.

[0040] Example 2: The present invention provides a conveyor constant tension buffer protection device, please refer to Figure 4-Figure 5 A sliding groove 331 is provided on one side wall of the clamping claw 33 close to the main shaft 31, and the magnetic block is slidably connected to the inside of the sliding groove 331. A friction assembly is fixedly connected to one side wall of the magnetic block close to the main shaft 31. The friction assembly includes a plurality of extrusion rings 332 whose diameters increase from the inside to the outside. Two adjacent extrusion rings 332 are fixedly connected by a connecting sleeve 333, and the extrusion ring 332 away from the magnetic block is fixedly connected to the opening of the sliding groove 331.

[0041] For details, please refer to Figure 6The electromagnetic sheet is used to attract the magnetic block so that the magnetic block can push the extrusion ring 332 to move outside the sliding groove 331 until it is attached to and squeezed on the surface of the conveyor belt 2. At this time, the extrusion rings 332 with increasing diameters are embedded in the opening of the sliding groove 331 to form an overall friction layer, which increases the friction coefficient and effectively increases the clamping stability of the conveyor belt 2.

[0042] The extrusion ring 332 is made of rubber material, and the connection sleeve 333 is made of air-permeable fiber. Two adjacent extrusion rings 332 are tightly attached to each other in the closed state.

[0043] Specifically, an annular sealing groove is formed between the tightly attached extrusion rings 332. After being squeezed, the annular sealing groove discharges the gas inside and forms a negative pressure inside, further improving the adsorption force on the conveyor belt 2. After the magnetic block relaxes the extrusion on the extrusion ring 332, the extrusion rings 332 are out of contact, and the air enters the annular sealing groove through the connecting sleeve 333 to destroy the negative pressure state, so that the clamping claw 33 can be out of contact with the conveyor belt 2 in time, reducing the impact on the movement of the conveyor belt 2.

[0044] Embodiment 3: The present invention provides a conveyor constant tension buffer protection device, please refer to Figure 7-Figure 8 A servo motor 37 is embedded in a side wall of the main shaft 31 close to the side disk 32, and a working chamber 322 corresponding to the position of the servo motor 37 is opened inside the side disk 32. The output end of the servo motor 37 extends into the working chamber 322 and is fixedly connected to a gear ring 36. The rotating bar 34 includes a hard extrusion flap 341, and a flexible extrusion flap 343 is fixedly connected to the bottom wall of the hard extrusion flap 341. A rotating shaft 342 is connected through the middle of the hard extrusion flap 341. The rotating shaft 342 extends into the working chamber 322 and is fixedly connected to a gear 35. The gear 35 is meshed with the servo motor 37, and the servo motor 37 is electrically connected to an external controller.

[0045] For details, please refer to Figure 8-Figure 9 The hard extrusion flap 341 has better stability and structural strength, so that the conveyor has higher stability at startup. After the conveyor has been running for a long time, the temperature of the conveyor belt 2 gradually rises, causing its length to extend due to thermal expansion and contraction. At this time, the servo motor 37 is rotated to drive the gear ring 36 and the gear 35 to rotate, thereby controlling the rotation of the rotating bar 34, so that the thicker flexible extrusion flap 343 is flipped to the outside to contact the conveyor belt 2, and the elongated part of the conveyor belt 2 is stretched open by the flexible extrusion flap 343, avoiding the situation where the conveyor belt 2 is too long and slips. Secondly, with the cooperation of the clamping claw 33 and the flexible extrusion flap 343, the conveyor belt 2 can maintain a relatively stable working state, and the deformation of the flexible extrusion flap 343 can increase the contact area with the conveyor belt 2, thereby further improving the stability of the device.

[0046] A liquid storage cavity is provided inside the flexible extrusion flap 343 , and the liquid storage cavity is filled with a buffer solution, and a fluorescent agent is added to the buffer solution. The buffer solution can improve the buffering capacity of the flexible extrusion flap 343 , and the fluorescent agent can promptly remind the staff when the flexible extrusion flap 343 leaks.

[0047] A cleaning layer is attached to the outer wall of the flexible extrusion flap 343, and the cleaning layer is made of artificial fiber material. After the conveyor belt 2 is slightly loosened by using the adjustment component 4, the clamping claw of the anti-slip component 3 at one end is kept in a working state, and the anti-slip component 3 at the other end remains stationary. At this time, the conveyor belt 2 will rub against the stationary flexible extrusion flap 343. The cleaning layer outside the flexible extrusion flap 343 can clean the surface of the conveyor belt 2 to prevent stains from adhering to reduce friction and cause the conveyor belt to slip.

[0048] The outer wall of the hard extruded flap 341 is tightly and smoothly connected to the outer wall of the main shaft 31 .

[0049] See also Fig.11 A pair of side plates 12 are fixedly connected to the lower ends with an adjusting assembly 4, the adjusting assembly 4 includes a roller shaft 2 44, a pair of side plates 12 are rotatably connected with a pair of roller shafts 13 corresponding to the position of the roller shaft 2 44, the conveyor belt 2 is wound around the roller shaft 13 and the outer wall of the roller shaft 2 44, and the two ends of the roller shaft 2 44 are fixedly connected to a top plate 43 through a bracket, and the lower end of the top plate 43 is fixedly connected to a bottom plate 41 through a hydraulic lifting rod 45, and both ends of the bottom plate 41 are fixedly connected to the bottom of the side plate 12 through a connecting plate 42. The hydraulic lifting rod 45 is also electrically connected to the external controller. A wide range of tension adjustment can be achieved by using the hydraulic lifting rod 45 to push and pull the top plate 43 to control the roller shaft 2 44 to rise or fall, thereby realizing the length adjustment of the conveyor belt 2.

[0050] The above is only the best implementation method adopted by this application in combination with current actual needs, but the protection scope of this application is not limited to this.

Claims

1. A conveyor constant tension buffer protection device, comprising a frame structure (1), wherein the frame structure (1) comprises a pair of supporting legs (11) and a pair of side plates (12) fixedly mounted at the upper ends thereof, characterized in that: A pair of anti-skid components (3) are rotatably connected between the pair of side plates (12) and at both ends thereof, a conveyor belt (2) is wound around the outside of the anti-skid components (3), and the anti-skid components (3) and the conveyor belt (2) form an attachment area and a detachment area, and the anti-skid components (3) include a main shaft (31) and side plates (32) fixedly connected at both ends thereof, a plurality of installation grooves (321) are provided on the side wall of the side plate (32) close to the main shaft (31), and a plurality of outer walls of the main shaft (31) are provided with positions corresponding to the installation grooves (321). A reserved groove (311) is provided in the reserved groove (311), a rotating bar (34) is provided inside the reserved groove (311), a clamping claw (33) is rotatably connected inside the mounting groove (321), a magnetic block is provided inside the clamping claw (33), an electromagnetic sheet is provided inside the rotating bar (34), a main motor corresponding to the position of the side disc (32) is fixedly connected to the outer wall of the side plate (12), an output end of the main motor passes through the side plate (12) and is fixedly connected to the side disc (32), and the electromagnetic sheet and the main motor are both electrically connected to an external controller; A sliding groove (331) is provided on a side wall of the clamping claw (33) close to the main shaft (31); the magnetic block can be slidably connected to the inside of the sliding groove (331); a friction component is fixedly connected to a side wall of the magnetic block close to the main shaft (31); the friction component comprises a plurality of extrusion rings (332) whose diameters increase from the inside to the outside; two adjacent extrusion rings (332) are fixedly connected via a connecting sleeve (333); and the extrusion ring (332) away from the magnetic block is fixedly connected to the opening of the sliding groove (331); The extrusion ring (332) is made of a rubber material, and the connection sleeve (333) is made of a breathable fiber, and two adjacent extrusion rings (332) are tightly attached to each other in a closed state; A servo motor (37) is embedded in a side wall of the main shaft (31) close to the side plate (32); a working chamber (322) corresponding to the position of the servo motor (37) is provided inside the side plate (32); an output end of the servo motor (37) extends into the working chamber (322) and is fixedly connected to a gear ring (36); the rotating bar (34) comprises a hard extrusion flap (341); a flexible extrusion flap (343) is fixedly connected to the bottom wall of the hard extrusion flap (341); a rotating shaft (342) is connected through the middle of the hard extrusion flap (341); the rotating shaft (342) extends into the working chamber (322) and is fixedly connected to a gear (35); the gear (35) and the servo motor (37) are meshedly connected; the servo motor (37) is electrically connected to an external controller; a liquid storage chamber is provided inside the flexible extrusion flap (343); the liquid storage chamber is filled with a buffer solution; a fluorescent agent is added to the buffer solution.

2. The conveyor constant tension buffer protection device according to claim 1, characterized in that: An adjustment assembly (4) is fixedly connected to the lower ends of a pair of side plates (12), and the adjustment assembly (4) includes a second roller shaft (44). A pair of first roller shafts (13) corresponding to the position of the second roller shaft (44) are rotatably connected between the pair of side plates (12). The conveyor belt (2) is wound around the outer walls of the first roller shaft (13) and the second roller shaft (44). The two ends of the second roller shaft (44) are fixedly connected to a top plate (43) via a bracket. The lower end of the top plate (43) is fixedly connected to a bottom plate (41) via a hydraulic lifting rod (45). Both ends of the bottom plate (41) are fixedly connected to the bottom of the side plates (12) via a connecting plate (42). The hydraulic lifting rod (45) is also electrically connected to an external controller.

3. The conveyor constant tension buffer protection device according to claim 1, characterized in that: A cleaning layer is attached to the outer wall of the flexible extrusion flap (343), and the cleaning layer is made of artificial fiber material.

4. The conveyor constant tension buffer protection device according to claim 1, characterized in that: The outer wall of the hard extrusion flap (341) is tightly and smoothly connected to the outer wall of the main shaft (31).

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