Hydraulic tensioning adjusting device for telescopic tail of belt conveyor

Abstract

The invention relates to the technical field of belt auxiliary structures, in particular to a belt conveyor telescopic tail hydraulic tension adjusting device which comprises a winding set and two power sets arranged on the two sides of the winding set and used for providing winding power for the winding set, and the winding set is used for locally winding and tightening a conveying belt; by adopting the mode that the multiple roller sets are linearly arranged to clamp part of the core shaft and wind, part of the conveying belt can be conveniently wound together, the purpose of adjusting the tension degree of the conveying belt is achieved, meanwhile, the adjusting mode is small in occupied space, the size of the machine tail cannot be affected, and the production efficiency is improved. In this way, the cut coal can be directly received by the machine tail at the specified height position conveniently, the position of the conveying roller in the machine tail does not need to be adjusted in the winding mode, the overall structure of the machine tail cannot be affected, the conveying roller can receive the coal at the specified position conveniently, and normal coal mining work is guaranteed.

Description

Technical Field

[0001] This invention relates to the technical field of belt auxiliary structures, and in particular to a hydraulic tensioning adjustment device for a retractable tail section of a belt conveyor. Background Technology

[0002] In modern coal mine fully mechanized mining faces, belt conveyors are key equipment for continuous coal transportation. To support efficient coal cutters and achieve continuous mining, retractable tail devices are widely used. These devices allow the tail of the belt conveyor to retract synchronously with the advancement of the coal mining face, avoiding frequent disassembly and reassembly of the conveyor belt, and greatly improving coal mining efficiency and production continuity.

[0003] However, after prolonged use and frequent deformation, the conveyor belt is prone to loosening, leading to a decrease in friction between the conveyor belt and the tail conveyor roller, which can easily cause slippage and affect the normal coal transport operation. To avoid this, the conveyor belt needs to be continuously tensioned. Traditional tensioning methods include using a weight to squeeze the conveyor belt, or using a hydraulic tie rod to pull the conveyor roller on the tail to move and squeeze the conveyor belt, or using an adjusting screw to move the conveyor roller on a screw sleeve. However, due to the limited space at the tail and the need for the tail to receive the cut coal at a precise position, using a weight would increase the height of the conveyor roller at the tail, requiring other transfer structures to lift the cut coal onto the conveyor belt. This method involves complex paths and large equipment volumes. Using a moving conveyor roller would require the tail to provide a large space for the movement of the conveyor roller, and the movement of the conveyor roller would change the position of the conveyor belt receiving coal, affecting normal coal mining operations. Summary of the Invention

[0004] This invention provides a hydraulic tensioning adjustment device for the retractable tail of a belt conveyor, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A retractable tail hydraulic tensioning adjustment device for a belt conveyor includes a winding group and two power groups disposed on both sides of the winding group for providing winding power to the winding group. The winding group is used to partially wind and tighten the conveyor belt. The winding assembly includes a mandrel and several roller groups arranged linearly. Adjacent roller groups are rotatably connected to each other. Each roller group includes two pressure columns, which are respectively disposed on the inner and outer sides of the conveyor belt. The two pressure columns are close to each other and squeeze the same position of the conveyor belt. The mandrel is connected to the roller group located in the middle, and the mandrel can rotate clockwise or counterclockwise around its own axis.

[0006] In some embodiments of the present invention, the roller group further includes two outer covers disposed outside the two pressure columns, and the two outer covers are detachably disposed together. The pressure columns are rotatably installed inside the outer covers, and the mandrel is fixedly connected to one of the outer covers in the corresponding roller group. A connecting arm is provided on one of the outer covers within the roller group, and adjacent roller groups are rotatably connected by the connecting arm.

[0007] In some embodiments of the present invention, each of the outer covers is provided with anti-collision blocks.

[0008] In some embodiments of the present invention, the mandrel moves in a direction perpendicular to the conveyor belt conveying direction or inclined relative to the conveyor belt conveying direction.

[0009] In some embodiments of the present invention, the power unit includes a support frame and a rack and a guide rail disposed within the support frame and parallel to each other. The rack and the guide rail are respectively provided with a gear and a slider. The gear is mounted on the spindle, and the spindle is rotatably connected to the slider.

[0010] In some embodiments of the present invention, the power unit further includes a base, a plurality of transmission wheels, a belt driven on the plurality of transmission wheels, and a hydraulic cylinder disposed on the base. The plurality of transmission wheels are respectively disposed on the base and the support frame. A piston rod is disposed on the hydraulic cylinder. The piston rod is connected to the transmission wheel through a connecting plate. The transmission wheel is connected to the slider.

[0011] In some embodiments of the present invention, the connecting plate is provided with a pressure seat, the bottom of the pressure seat is set as an inclined surface, and a pressure platform is provided on the inclined surface, the pressure platform and the pressure seat are connected by an elastic body; There is relative frictional sliding between the pressure base and the pressure platform, and between the pressure platform and the base.

[0012] In some embodiments of the present invention, a reversing column is vertically provided on the top of the pressure seat, and the reversing column is rotatably mounted on the connecting plate.

[0013] In some embodiments of the present invention, a sliding plate that is slidably connected to the outer wall of the reversing column is provided on the connecting plate; The piston rod includes a main rod connected to the oil cylinder and a secondary rod connected to the connecting plate. The end of the main rod facing the secondary rod has an insertion hole. A limiting groove is provided on the outer wall of the main rod along the axis of the main rod and communicating with the insertion hole. A limiting block is slidably arranged in the limiting groove. The end of the secondary rod is slidably inserted into the insertion hole, and the secondary rod is fixedly connected to the limiting block. The sliding plate is connected to the main rod.

[0014] In some embodiments of the present invention, the base is provided with a strip parallel to the piston rod, and a plurality of arc-shaped slots are formed on the strip along the length direction of the strip, and the arc-shaped opening directions of the plurality of arc-shaped slots are staggered along two directions of the straight line where the strip is located. The bottom of the pressure table is provided with an arc-shaped locking edge that cooperates with the arc-shaped locking groove, and the center of the arc-shaped locking edge coincides with the axis of the reversing column.

[0015] The technical solution of this invention can achieve the following technical effects: By using several roller groups arranged linearly to clamp and wind a portion of the mandrel, a portion of the conveyor belt can be easily wound together, thereby achieving the purpose of adjusting the conveyor belt tension. At the same time, this adjustment method occupies less space and does not affect the volume of the tail section. This allows the tail section to directly receive the cut coal at a specified height. Moreover, this winding method does not require adjusting the position of the conveyor rollers in the tail section, thus not affecting the overall structure of the tail section. It facilitates the conveyor rollers to receive coal at the specified position, ensuring the normal operation of coal mining. Since the several roller groups are wound in a double-vortex manner, it can be ensured that the conveyor belt can still pass smoothly through the several roller groups during winding. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the combined structure of the winding unit and the power unit in an embodiment of the present invention; Figure 3 This is a schematic diagram of the winding assembly structure in an embodiment of the present invention; Figure 4 This is a schematic diagram of the outer cover structure in an embodiment of the present invention; Figure 5 This is a schematic cross-sectional view of the outer cover in an embodiment of the present invention; Figure 6 This is a schematic diagram of the power unit structure in an embodiment of the present invention; Figure 7 This is a schematic diagram of the connecting plate and its structure in an embodiment of the present invention; Figure 8 This is an exploded structural diagram of the slats and pressure table in an embodiment of the present invention.

[0018] Figure label: 100. Conveyor belt; 200. Rewinding assembly; 201. Mandrel; 202. Pressure column; 203. Outer cover; 204. Connecting arm; 205. Anti-collision block; 300. Power unit; 301. Support frame; 302. Rack; 303. Guide rail; 304. Gear; 305. Slider; 306. Base; 307. Transmission wheel; 308. Belt; 309. Hydraulic cylinder; 310. Piston rod; 311. Connecting plate; 312. Pressure seat; 313. Pressure table; 314. Elastomer; 315. Reversing column; 316. Slide plate; 317. Main rod; 318. Secondary rod; 319. Limiting groove; 320. Limiting block; 400, slats; 401, arc-shaped grooves; 402, arc-shaped ridges. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] like Figures 1 to 5 As shown, a retractable tail hydraulic tensioning adjustment device for a belt conveyor according to the present invention includes a winding group 200 and two power groups 300 disposed on both sides of the winding group 200 and used to provide winding power to the winding group 200. The winding group 200 is used to partially wind and tighten the conveyor belt 100. The winding assembly 200 includes a mandrel 201 and several rollers arranged in a linear manner. Adjacent rollers are rotatably connected to each other. Each roller assembly includes two pressure columns 202, which are respectively located on the inner and outer sides of the conveyor belt 100. The two pressure columns 202 are close to each other and squeeze the same position of the conveyor belt 100. The spindle 201 is connected to the roller group located in the middle, and the spindle 201 can rotate clockwise or counterclockwise around its own axis.

[0022] In this invention, by utilizing two pressure columns 202 in the roller group located on the inner and outer sides of the conveyor belt 100 respectively, a specific position of the conveyor belt 100 can be clamped by the roller group, and this method does not interfere with the conveying movement of the conveyor belt 100. Several roller groups are arranged sequentially, thereby enabling local clamping of the conveyor belt 100. Figure 1 For example, several roller sets clamp a local area on the lower side of the conveyor belt 100, while the upper side of the conveyor belt 100 can be used to transport coal. When adjusting the tension of the conveyor belt 100, only the local area on the lower side of the conveyor belt 100 needs to be adjusted, so as not to interfere with the normal coal transport operation of the conveyor belt 100.

[0023] In use, the conveyor belt 100 passes through the gap between two pressure columns 202 in several roller sets and conveys the material. At this time, the conveyor belt 100 can drive the pressure columns 202 to rotate. When the conveyor belt 100 is slack, the mandrel 201 can be rotated by the power unit 300, causing the mandrel 201 to drive the intermediate roller set to rotate. At this time, the intermediate roller set will drive the movement of several roller sets on both sides. Since the conveyor belt 100 passes through several roller sets, the conveyor belt 100 restricts the roller sets, causing the roller sets on both sides to gradually wrap around the intermediate roller set. This causes the local conveyor belt 100 within the range of the roller sets to gradually change from a straight shape to a vortex shape. Moreover, this vortex is a double vortex formed by the simultaneous winding of several roller sets on both sides. The winding deformation of the conveyor belt 100 will change its tension, thereby realizing the tension adjustment work. Figure 2 For example, when several roller sets are wound to the maximum number of turns, the two roller sets on both sides can be located on the upper and lower sides of the winding body composed of several roller sets respectively. After that, they cannot continue to be wound to avoid the conveyor belt 100 output or input of the roller sets on both sides from contacting the winding body, thereby generating relative friction.

[0024] It should be noted that since the spindle 201 can wind several roller groups on both sides together by rotating clockwise or counterclockwise, the tension adjustment method of the conveyor belt 100 can have a bidirectional tension adjustment function depending on the rotation direction of the spindle 201; since the roller group only needs to drive part of the conveyor belt 100 to wind up, the distance between the two winding groups 200 in the roller group can be greater than the thickness of the conveyor belt 100.

[0025] In some embodiments, the roller assembly may also employ a single pressure column 202. Several pressure columns 202 on the inner side of the conveyor belt 100 are located on the left side of the axis of the mandrel 201, and several pressure columns 202 on the outer side of the conveyor belt 100 are located on the right side of the axis of the mandrel 201. Thus, when the mandrel 201 rotates, the winding operation can also be achieved using several pressure columns 202.

[0026] By using several roller groups arranged linearly to clamp and wind a portion of the mandrel 201, a portion of the conveyor belt 100 can be easily wound together, thereby achieving the purpose of adjusting the tension of the conveyor belt 100. At the same time, this adjustment method occupies less space and will not affect the volume of the tail section. This allows the tail section to directly receive the cut coal at a specified height. Moreover, this winding method does not require adjusting the position of the conveyor rollers in the tail section, thus not affecting the overall structure of the tail section. It facilitates the conveyor rollers to receive coal at the specified position, ensuring the normal operation of coal mining. Since the several roller groups are wound in a double vortex manner, it can be ensured that the conveyor belt 100 can still pass smoothly through the several roller groups during winding.

[0027] When several roller sets are intertwined, the pressure columns 202 in adjacent roller sets will come into contact with each other. Due to the current conveying direction of the conveyor belt 100, the pressure columns 202 in adjacent roller sets rotate in the same direction, and since one end of them is in contact, they will rub against each other, causing the pressure columns 202 to malfunction. To avoid this phenomenon, the following can be used: Figure 4 As shown, the roller assembly also includes two outer covers 203 disposed outside the two pressure columns 202, and the two outer covers 203 are detachably mounted. The pressure columns 202 are rotatably mounted inside the outer covers 203, and the spindle 201 is fixedly connected to one of the outer covers 203 in the corresponding roller assembly. A connecting arm 204 is provided on one of the outer covers 203 in the roller assembly, and adjacent roller assemblies are rotatably connected through the connecting arm 204.

[0028] The two outer covers 203 within the roller assembly are both located outside the two pressure columns 202, and the two outer covers 203 are separated from each other. The gap between them can be used for the conveyor belt 100 to pass through. The ends of the two outer covers 203 can be... Figure 4 The connection is made by bolts or other methods such as snap-fit ​​or welding. The two outer covers 203 can support the two pressure columns 202 simultaneously. When the two roller groups come into contact with each other, the outer covers 203 in the two roller groups will come into direct contact, thereby avoiding the pressure columns 202 in the two roller groups from coming into contact with each other and affecting the normal movement of the pressure columns 202 and the conveyor belt 100. Each end of one of the outer covers 203 in the roller group is provided with connecting arms 204 on both the left and right sides. Adjacent roller groups are rotatably connected through the connecting arms 204, thereby realizing the interconnection of several roller groups.

[0029] like Figure 4 As shown, each outer cover 203 is provided with anti-collision blocks 205; when several roller groups are intertwined, the corresponding anti-collision blocks 205 in two adjacent roller groups abut against each other, thereby realizing the shock absorption and buffering work of the two adjacent roller groups, and at the same time limiting the relative rotation angle between the two adjacent roller groups.

[0030] In the above implementation, when the several roller groups are wound up to the maximum number of turns, the conveyor belt 100 still has not reached the specified tension. At this time, the winding body composed of the several roller groups can move toward the inside of the conveyor belt 100 to further tension the conveyor belt 100. Specifically, the mandrel 201 moves in a direction perpendicular to the conveying direction of the conveyor belt 100 or in a direction that is relatively inclined to the conveying direction of the conveyor belt 100.

[0031] By using the movement of a winding body composed of several roller groups to drive the deformation of the conveyor belt 100, the tension range can be further increased on the basis of the original winding tension, thereby increasing the adjustable range of the conveyor belt 100.

[0032] Optimized from the above implementation, such as Figure 6 As shown, the power unit 300 includes a support frame 301 and a rack 302 and a guide rail 303 arranged in parallel within the support frame 301. A gear 304 and a slider 305 are respectively fitted on the rack 302 and the guide rail 303. The gear 304 is mounted on the spindle 201, and the spindle 201 and the slider 305 are rotatably connected.

[0033] The support frame 301 can be used to support its internal structure and spindle 201. The gear 304 is meshed with the rack 302. When the gear 304 rolls on the rack 302, the gear 304 will drive the slider 305 to slide on the guide rail 303. The gear 304 will also drive the spindle 201 to rotate and move, thereby causing the spindle 201 to wind around several roller groups. At the same time, the movement of the spindle 201 will cause the winding body composed of several roller groups to move, so that the tension of the conveyor belt 100 can be adjusted in two ways at the same time. Moreover, the structure is simple and easy to operate. Two adjustment methods can be achieved by simply rolling the gear 304.

[0034] In an optimized version of the above implementation, the power unit 300 further includes a base 306, a plurality of transmission wheels 307, a pull belt 308 that is driven on the plurality of transmission wheels 307, and a hydraulic cylinder 309 that is mounted on the base 306. The plurality of transmission wheels 307 are respectively mounted on the base 306 and the support frame 301. A piston rod 310 is mounted on the hydraulic cylinder 309. The piston rod 310 is connected to the transmission wheels 307 through a connecting plate 311. The transmission wheels 307 are connected to the slider 305.

[0035] like Figure 6As shown, the number of transmission wheels 307 can be three. At this time, the shape of the pull belt 308 is triangular. Using this shape, the extension and retraction movements of the hydraulic cylinder 309 and piston rod 310 and the movement of the slider 305 in different directions of motion can be connected together. When the hydraulic cylinder 309 drives the piston rod 310 to move, it will drive the pull belt 308 to be conveyed through the connecting plate 311. The pull belt 308 drives the slider 305 to move through the reversal and transmission of the three transmission wheels 307, thereby providing power for the movement of the spindle 201. When the hydraulic cylinder 309 and piston rod 310 perform extension and retraction movements, since they can perform bidirectional movements, the several roller groups can realize bidirectional winding movements.

[0036] When the hydraulic cylinder 309 and piston rod 310 extend and retract, the hydraulic oil in the cylinder 309 needs to maintain a certain pressure at all times to keep the conveyor belt 100 taut and prevent it from springing back. Maintaining this pressure keeps the external hydraulic station constantly operating, resulting in significant energy loss. To solve this problem, such as... Figures 7 to 8 As shown, a pressure seat 312 is provided on the connecting plate 311. The bottom of the pressure seat 312 is set as an inclined surface, and a pressure platform 313 is provided on the inclined surface. The pressure platform 313 and the pressure seat 312 are connected by an elastic body 314. There is relative friction and sliding between the pressure seat 312 and the pressure platform 313, and between the pressure platform 313 and the base 306. Taking the contraction and tension of the hydraulic cylinder 309 and the piston rod 310 as an example, when the conveyor belt 100 is tensioned, the piston rod 310 moves towards the hydraulic cylinder 309. At this time, the connecting plate 311 moves synchronously and drives the belt 308 to drive. The connecting plate 311 drives the pressure seat 312, the pressure platform 313 and the elastic body 314 to move synchronously. Since the bottom of the pressure seat 312 is inclined, the friction between the pressure platform 313 and the base 306 cannot move the pressure seat 312. This creates an obstruction. When the tension of the conveyor belt 100 reaches the specified requirement, the hydraulic oil in the cylinder 309 can reduce the pressure. At this time, the force of the conveyor belt 100 on the connecting plate 311 will cause it to move in the opposite direction. Due to the friction between the pressure table 313 and the base 306 and the structure of the pressure seat 312 and the pressure table 313 connected by an inclined plane, the pressure seat 312, the pressure table 313 and the base 306 can be locked together, so that the pressure seat 312 and the connecting plate 311 cannot move in the opposite direction. This can help lock the tension of the conveyor belt 100, so that the cylinder 309 and the piston rod 310 can be idle, reducing energy consumption. The elastic body 314 can provide auxiliary elastic force for the pressure table 313, thereby helping it to achieve the locking effect.

[0037] Since the hydraulic cylinder 309 and piston rod 310 can extend and retract, the locking direction between the pressure seat 312, pressure table 313, and base 306 needs to be bidirectional. That is, when the piston rod 310 actively moves to the left, the bottom slope of the pressure seat 312 tilts to the right, and the piston rod 310 cannot move to the right. When the piston rod 310 actively moves to the right, the bottom slope of the pressure seat 312 tilts to the left, and the piston rod 310 cannot move to the left. Specifically, as follows... Figure 7 As shown, a reversing column 315 is vertically arranged on the top of the pressure seat 312, and the reversing column 315 is rotatably mounted on the connecting plate 311. By utilizing the rotational characteristics of the reversing column 315, the locking direction of the pressure seat 312 and the pressure table 313 can be changed, thereby meeting the needs of bidirectional tension adjustment of the equipment.

[0038] Based on the above implementation, such as Figure 7 As shown, a sliding plate 316 is horizontally slidably disposed on the connecting plate 311 and is connected to the outer wall of the reversing column 315 in a transmission manner; The piston rod 310 includes a main rod 317 connected to the oil cylinder 309 and a secondary rod 318 connected to the connecting plate 311. The end of the main rod 317 facing the secondary rod 318 has an insertion hole. The outer wall of the main rod 317 is provided with a limiting groove 319 along the axis of the main rod 317 and communicating with the insertion hole. A limiting block 320 is slidably arranged in the limiting groove 319. The end of the secondary rod 318 is slidably inserted into the insertion hole, and the secondary rod 318 is fixedly connected to the limiting block 320. The skateboard 316 is connected to the main rod 317.

[0039] When the piston rod 310 moves to the left and pulls the connecting plate 311 to move, the limiting block 320 moves to the right inside the limiting groove 319 by utilizing the deformation resistance of the conveyor belt 100. At this time, the main rod 317 and the auxiliary rod 318 move relative to each other, causing the slide plate 316 to move relative to the connecting plate 311. The slide plate 316 drives the reversing column 315 to rotate in the forward direction. When the piston rod 310 moves to the right and pulls the connecting plate 311 to move, the limiting block 320 is reversed and located inside the limiting groove 319 on the left side. The sliding plate 316 moves relative to the connecting plate 311 and pushes the reversing column 315 to rotate in the opposite direction. By utilizing the relative movement of the piston rod 310, the main rod 317 and the auxiliary rod 318 can be moved to automatically adjust the direction of the reversing column 315 and its pressure seat 312 without the need to set up an adjustment structure for changing the direction of the pressure seat 312. It should be noted that, in order to buffer the relative movement of the main rod 317 and the auxiliary rod 318, a spring connecting the main rod 317 and the auxiliary rod 318 can be installed in the socket.

[0040] Based on the above implementation, such as Figures 7 to 8As shown, a strip 400 parallel to the piston rod 310 is provided on the base 306. Several arc-shaped slots 401 are provided on the strip 400 along the length direction of the strip 400. The arc-shaped opening directions of the several arc-shaped slots 401 are staggered along two directions of the straight line where the strip 400 is located. The bottom of the pressure table 313 is provided with an arc-shaped retaining ridge 402 that works in conjunction with the arc-shaped retaining groove 401, and the center of the arc-shaped retaining ridge 402 coincides with the axis of the reversing column 315.

[0041] On the slat 400, several arc-shaped slots 401 with left-facing arc openings are arranged in a straight line, and several arc-shaped slots 401 with right-facing arc openings are also arranged in a straight line, with the arc-shaped slots 401 in both directions located on the slat 400 simultaneously, thereby forming a series of arc-shaped slots 401 on the slat 400 as follows: Figure 8 As shown in the diagram, the arc-shaped locking ridge 402 at the bottom of the pressure table 313 can engage with the corresponding arc-shaped locking groove 401. When the bottom slope of the pressure seat 312 tilts to the right and the piston rod 310 moves to the left, the pressure table 313 can move normally relative to the strip 400. The arc-shaped locking ridge 402 at the bottom of the pressure table 313 will pass through several arc-shaped locking grooves 401 in sequence. When the tension of the conveyor belt 100 is adjusted and the hydraulic oil pressure in the cylinder 309 drops, the reverse pulling tendency of the conveyor belt 100 on the pressure seat 312 will cause the arc-shaped locking ridge 402 on the pressure table 313 to engage with the corresponding arc-shaped locking groove 401, thereby improving the locking effect, avoiding relative sliding and affecting the tension accuracy of the conveyor belt 100.

[0042] Since several roller sets have bidirectional adjustment capabilities, when the slide plate 316 drives the reversing column 315 to rotate, the reversing column 315 can directly drive the pressure table 313 and its arc-shaped locking rib 402 to rotate. The arc-shaped locking rib 402 slides from the arc-shaped locking groove 401 opening to one side into the arc-shaped locking groove 401 opening to the other side, thereby facilitating the bidirectional locking effect of the slats 400, the arc-shaped locking groove 401 and the arc-shaped locking rib 402 on the conveyor belt 100 by the pressure seat 312 and the pressure table 313.

[0043] 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 the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic tensioning adjustment device for a retractable tail section of a belt conveyor, characterized in that, It includes a winding assembly and two power assemblies disposed on both sides of the winding assembly and used to provide winding power to the winding assembly. The winding assembly is used to partially wind and tighten the conveyor belt. The winding assembly includes a mandrel and several roller groups arranged linearly. Adjacent roller groups are rotatably connected to each other. Each roller group includes two pressure columns, which are respectively disposed on the inner and outer sides of the conveyor belt. The two pressure columns are close to each other and squeeze the same position of the conveyor belt. The mandrel is connected to the roller group located in the middle, and the mandrel can rotate clockwise or counterclockwise around its own axis.

2. The hydraulic tensioning adjustment device for the retractable tail of a belt conveyor according to claim 1, characterized in that, The roller assembly also includes two outer covers disposed outside the two pressure columns, and the two outer covers are detachably connected. The pressure columns are rotatably installed inside the outer covers, and the spindle is fixedly connected to one of the outer covers in the corresponding roller assembly. A connecting arm is provided on one of the outer covers within the roller group, and adjacent roller groups are rotatably connected by the connecting arm.

3. The hydraulic tensioning adjustment device for the retractable tail of a belt conveyor according to claim 2, characterized in that, Each of the aforementioned outer covers is equipped with anti-collision blocks.

4. The hydraulic tensioning adjustment device for the retractable tail of a belt conveyor according to claim 1, characterized in that, The mandrel moves in a direction perpendicular to the conveyor belt's conveying direction or inclined relative to the conveyor belt's conveying direction.

5. The hydraulic tensioning adjustment device for the retractable tail of a belt conveyor according to claim 1, characterized in that, The power unit includes a support frame and a rack and a guide rail arranged parallel to each other within the support frame. The rack and the guide rail are respectively equipped with gears and sliders. The gears are mounted on the spindle, and the spindle is rotatably connected to the slider.

6. The hydraulic tensioning adjustment device for the retractable tail of a belt conveyor according to claim 5, characterized in that, The power unit also includes a base, a plurality of transmission wheels, a belt that is driven on the plurality of transmission wheels, and a hydraulic cylinder that is mounted on the base. The plurality of transmission wheels are respectively mounted on the base and the support frame. A piston rod is mounted on the hydraulic cylinder. The piston rod is connected to the transmission wheel through a connecting plate. The transmission wheel is connected to the slider.

7. The hydraulic tensioning adjustment device for the retractable tail of a belt conveyor according to claim 6, characterized in that, The connecting plate is provided with a pressure seat, the bottom of the pressure seat is set as an inclined surface, and a pressure platform is provided on the inclined surface. The pressure platform and the pressure seat are connected by an elastic body. There is relative frictional sliding between the pressure base and the pressure platform, and between the pressure platform and the base.

8. The hydraulic tensioning adjustment device for the retractable tail of a belt conveyor according to claim 7, characterized in that, A reversing column is vertically provided on the top of the pressure base, and the reversing column is rotatably mounted on the connecting plate.

9. A hydraulic tensioning adjustment device for a retractable tail section of a belt conveyor according to claim 8, characterized in that, The connecting plate is horizontally slidably provided with a sliding plate that is in transmission connection with the outer wall of the reversing column. The piston rod includes a main rod connected to the oil cylinder and a secondary rod connected to the connecting plate. The end of the main rod facing the secondary rod has an insertion hole. A limiting groove is provided on the outer wall of the main rod along the axis of the main rod and communicating with the insertion hole. A limiting block is slidably arranged in the limiting groove. The end of the secondary rod is slidably inserted into the insertion hole, and the secondary rod is fixedly connected to the limiting block. The sliding plate is connected to the main rod.

10. A hydraulic tensioning adjustment device for a retractable tail section of a belt conveyor according to claim 9, characterized in that, The base is provided with a strip parallel to the piston rod. Several arc-shaped slots are formed on the strip along its length. The arc-shaped opening directions of the several arc-shaped slots are staggered along two directions of the straight line of the strip. The bottom of the pressure plate is provided with an arc-shaped locking edge that cooperates with the arc-shaped locking groove, and the center of the arc-shaped locking edge coincides with the axis of the reversing column.

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