A roller replacement device for a coal mine belt conveyor

Abstract

The present application relates to the technical field of roller replacement, and specifically, to a roller replacement device for a coal mine belt conveyor, comprising a fixed slide rail and two sliding blocks slidably arranged therein, wherein a lifting mechanism for lifting the belt is arranged on the fixed slide rail; a strip-shaped through groove is arranged on the fixed slide rail, and the lifting mechanism comprises a first two-way telescopic plate that can move in a direction perpendicular to the length of the fixed slide rail; a second two-way telescopic plate is hinged at both ends of the first two-way telescopic plate, a second telescopic rod is arranged on the top of each sliding block, and the second telescopic rod is ball-jointed with the corresponding second two-way telescopic plate; a two-way telescopic cylinder is rotatably arranged on the first two-way telescopic plate and the two second two-way telescopic plates; a middle replacement mechanism for replacing the middle roller is arranged on the first telescopic plate; the present application can lift the belts on belt conveyors of different specifications, and replace the rollers in the middle position through the middle replacement mechanism, thereby ensuring the safety of the staff.

Description

Technical Field

[0001] The present application relates to the technical field of roller replacement, and in particular to a roller replacement device for a coal mine belt conveyor. Background Art

[0002] Belt conveyors for coal mines mainly refer to belt conveyors used in coal mining, production, transportation and processing. They are mainly composed of frames, conveyor belts, rollers, drums, tensioning devices, transmission devices, etc., among which rollers are consumable parts and need to be replaced more frequently.

[0003] Chinese patent: CN113305552A discloses a roller replacement device for a coal mine belt conveyor, comprising a bottom plate, a lifting mechanism is installed above the bottom plate, and fixing mechanisms are installed on both sides below the bottom plate. The bottom plate, the lifting mechanism and the fixing mechanism are connected as a whole.

[0004] In this application, the belt is lifted up by a lifting mechanism to facilitate replacement by the staff. However, during the replacement process, the entire machine needs to be stopped, which will affect the transportation process of the coal mine. In addition, for the rollers arranged in the center, due to their remote location, after the belt is lifted up, the staff cannot replace them outside the conveyor. Based on this premise, the staff needs to drill into the conveyor to replace them, which is dangerous. Summary of the invention

[0005] The main purpose of the present application is to provide a roller replacement device for a coal mine belt conveyor, which can lift the belts on belt conveyors of different specifications through a lifting mechanism, and replace the rollers in the middle position through a middle replacement mechanism, thereby ensuring the safety of the workers.

[0006] To achieve the above object, the present application provides a roller replacement device for a coal mine belt conveyor, including a fixed slide rail, a jacking mechanism, and a middle replacement mechanism; two sliding blocks are slidably arranged in the fixed slide rail, hinge grooves are arranged on the opposite sides of each sliding block, and fixing plates are hinged in each hinge groove; the jacking mechanism is arranged on the fixed slide rail and is used to jack up the belt; the jacking mechanism includes a sliding bar, a first hydraulic rod, and a first double-direction telescopic plate; a strip-shaped through groove is arranged on one side of the center of the bottom of the fixed slide rail along the length direction, there are two sliding bars, both sliding bars are slidably arranged in the strip-shaped through groove, a first hydraulic rod is arranged on each sliding bar, both ends of the first double-direction telescopic plate are respectively connected to the corresponding first hydraulic rod, both ends of the first double-direction telescopic plate are hinged with second double-direction telescopic plates, a ball hinge seat is arranged at one end of each second double-direction telescopic plate away from the first double-direction telescopic plate, an extension column is arranged on one side of each sliding block close to the first hydraulic rod, and two strip-shaped avoidance grooves for avoiding the extension columns are arranged on the fixed slide rail; a second hydraulic rod is arranged at one end of each extension column away from the corresponding sliding block, a ball head is arranged at one end of each second hydraulic rod away from the corresponding extension column, the ball head is hinged with the corresponding ball hinge seat, and double-direction telescopic cylinders are rotatably arranged on the first double-direction telescopic plate and the two second double-direction telescopic plates; guide plates are arranged at both ends of the first double-direction telescopic plate close to the fixed slide rail, guide grooves are arranged on the opposite sides of each guide plate, and the middle replacement mechanism is arranged between the two guide plates and is used to replace the rollers in the middle position; the middle replacement mechanism includes two limit blocks slidably arranged in the corresponding guide grooves, rectangular notches are arranged on the opposite sides of each limit block, strip-shaped notches communicating with the rectangular notches are arranged at the bottoms of the outer walls of one side of each limit block, limit plates are slidably arranged in the strip-shaped notches, lower pressing plates are also slidably arranged in the rectangular notches, and pressing springs are arranged between the lower pressing plates and the inner walls of the rectangular notches; L-shaped avoidance strips are arranged on the outer walls of one side of each limit block away from the strip-shaped notches, and temporary storage plates for placing rollers are arranged at one end of each L-shaped avoidance strip away from the corresponding limit block.

[0007] Preferably, the middle replacement mechanism further includes a third hydraulic rod and a double-direction telescopic rod; sliding plates are arranged on the opposite sides of each limit block, the sliding plates are slidably arranged in the corresponding guide grooves, and the two sliding plates are connected to each other through the double-direction telescopic rod; an L-shaped mounting plate is arranged at the center of one side of the first double-direction telescopic plate close to the fixed slide rail, the third hydraulic rod is arranged on the L-shaped mounting plate, and the third hydraulic execution part passes through the L-shaped mounting plate and is connected to the center of the double-direction telescopic rod; U-shaped guiding plates are arranged on one side of each limit block close to the strip-shaped notch, the limit plates are slidably arranged in the corresponding U-shaped guiding plates, and pushing strips are arranged at one end of each limit plate close to the corresponding L-shaped avoidance strip.

[0008] Preferably, a side pressure strip is slidably arranged in each rectangular groove, and the length direction of the side pressure strip is perpendicular to the length direction of the lower pressure plate. An extension groove for avoiding the side pressure strip is arranged at the center of each lower pressure plate. A side pressure spring is also arranged between the side of each side pressure strip close to the strip-shaped groove and the inner wall of the corresponding rectangular groove.

[0009] Preferably, a plurality of auxiliary rollers are provided along the length direction of each side pressure strip on a side away from the strip-shaped notch.

[0010] Preferably, each temporary storage plate is also provided with an inclined plate.

[0011] Preferably, hinge rods are provided at both ends of each fixed plate, hinge holes are provided on the inner walls on both sides of each hinge groove, the hinge rods are rotatably arranged in the corresponding hinge holes, and each hinge rod is also sleeved with a reset torsion spring; reset rods are provided on the inner walls at both ends of the fixed slide rail along the length direction, and each sliding block is also provided with a rectangular avoidance groove for avoiding the reset rod, and the rectangular avoidance groove is connected to the corresponding hinge groove.

[0012] Preferably, one end of the fixed slide rail is also provided with an adjustment mechanism for moving the two sliding blocks or the two sliding bars closer to or farther from each other.

[0013] Preferably, the adjusting mechanism comprises a first bidirectional screw rod, a second bidirectional screw rod and a rectangular cover; the first bidirectional screw rod and the second bidirectional screw rod are both rotatably arranged in the fixed slide rail, and two ends of the first bidirectional screw rod are respectively threadedly connected to the corresponding sliding block, and two ends of the second bidirectional screw rod are respectively threadedly connected to the corresponding sliding bar, and each sliding block is provided with an avoidance hole for avoiding the second bidirectional screw rod; the rectangular cover is arranged at the end of the fixed slide rail, and the ends of the first bidirectional screw rod and the second bidirectional screw rod extending into the interior of the rectangular cover are both provided with an adjusting disk, and a polygonal slot is arranged at the center of each adjusting disk, and a horizontal slide groove is arranged on the side of the rectangular cover away from the fixed slide rail, and a horizontal block is slidably arranged in the horizontal slide groove, and a rotating shaft is rotatably arranged at the center of the horizontal block, and a polygonal plug block matching the polygonal slot is arranged at one end of the rotating shaft extending into the rectangular cover, and a clamping spring is also arranged on the rotating shaft, and the clamping spring is located between the polygonal plug block and the horizontal block, and a rotating handle is arranged at the end of the rotating shaft away from the polygonal plug block.

[0014] Preferably, each fixing plate is also provided with a shock absorbing pad.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present application cooperates with the first bidirectional telescopic plate, the second bidirectional telescopic plate and the bidirectional telescopic cylinder to enable the belts on the belt conveyors of different specifications to be lifted up in the running state, so as to facilitate the staff to replace the rollers at the edge; and the first bidirectional telescopic plate and the second bidirectional telescopic plate can be in the shape of inverted isosceles trapezoids of different specifications, so as to prevent the coal from falling from the belt in the running state.

[0017] 2. In the present application, the two sliding bars cooperate with each other so that the blocks at both ends of the roller can be located in the rectangular notches of the corresponding limit blocks, and the lower pressure plate, the limit plate and the side pressure strips can make the blocks be located as far away from the strip-shaped notches as possible. The temporary storage plate and the inclined plate cooperate with each other to push out the roller in the middle position. Subsequently, the two limit blocks move synchronously, so that after the push bar set on the limit plate contacts the roller frame, the block can fall from the opening of the rectangular notch and contact the roller frame at the first time. With the cooperation of the lower pressure plate and the lower pressure spring, it can not only ensure that the block can contact the slot of the roller frame, but also shorten the replacement time of the roller.

[0018] 3. In this application, through the cooperation of the reset rod and the reset spring, the two sliding blocks are moved away from each other, so that the reset rod can contact the fixed plate, and the fixed plate overcomes the elastic force of the corresponding reset spring and is set in a horizontal state. At this time, the fixed plate is located inside the fixed slide rail, which is not only convenient for the staff to carry the fixed slide rail, but also can easily insert the fixed slide rail into the belt conveyor.

[0019] 4. In the present application, the rotating shaft and the rectangular cover are matched so that the rotating shaft can control the first bidirectional screw rod and the second bidirectional screw rod respectively, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0021] Figure 1 is a perspective view of the present invention in an inserted state;

[0022] Figure 2 It is a partial stereogram of the insertion state of the present invention;

[0023] Figure 3 It is a three-dimensional state of the present invention. Figure 2 ;

[0024] Figure 4 yes Figure 3 A partial enlarged view of the middle part;

[0025] Figure 5 is Figure 3 The partial enlarged view at position B in

[0026] Figure 6 is the partial perspective view of the present invention;

[0027] Figure 7 is the partial perspective view of the present invention in the using state;

[0028] Figure 8 is Figure 7 the partial enlarged view at position C in

[0029] Fig. 9 is the partial perspective exploded view of the present invention Figure 1 ;

[0030] Fig.10 is Fig. 9 the partial enlarged view at position D in

[0031] Fig.11 is the partial perspective exploded view of the present invention Figure 2 。

[0032] The reference numerals in the above figures are as follows:

[0033] 1 - Fixed slide rail; 11 - Slide block; 111 - Hinge groove; 112 - Extension column; 113 - Second hydraulic rod; 114 - Ball head; 115 - Hinge hole; 116 - Rectangular avoidance groove; 117 - Avoidance hole; 12 - Fixed plate; 121 - Hinge rod; 122 - Return torsion spring; 123 - Shock pad; 13 - Strip-shaped through groove; 14 - Strip-shaped avoidance groove; 15 - Return rod;

[0034] 2 - Lifting mechanism; 21 - Slide bar; 22 - First hydraulic rod; 23 - First double-acting telescopic plate; 231 - Guide plate; 232 - Guide groove; 233 - L-shaped mounting plate; 24 - Second double-acting telescopic plate; 241 - Ball hinge seat; 25 - Double-acting telescopic cylinder;

[0035] 3 - Middle replacement mechanism; 31 - Limit block; 311 - Rectangular notch; 312 - Strip-shaped notch; 313 - L-shaped avoidance strip; 314 - Temporary storage plate; 3141 - Inclined plate; 315 - Slide plate; 316 - C-shaped guide plate; 317 - Side pressure bar; 3171 - Side pressure spring; 3172 - Auxiliary roller; 32 - Limit plate; 321 - Push bar; 33 - Lower pressing plate; 331 - Lower pressing spring; 332 - Extension groove; 34 - Third hydraulic rod; 35 - Double-acting telescopic rod;

[0036] 4-adjustment mechanism; 41-first bidirectional screw rod; 42-second bidirectional screw rod; 43-rectangular cover; 431-horizontal slide groove; 432-horizontal block; 433-rotation axis; 434-polygonal plug block; 435-compression spring; 436-rotation handle; 44-adjustment disk; 441-polygonal slot;

[0037] 5-belt conveyor; 51-roller frame; 511-cage; 52-roller; 521-cage block; 53-frame. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0039] like Figures 1 to 11As shown, a roller replacement device for a coal mine belt conveyor comprises a fixed slide rail 1, a lifting mechanism 2 and a middle replacement mechanism 3; two sliding blocks 11 are slidably arranged in the fixed slide rail 1, and each sliding block 11 is provided with a hinge groove 111 on the opposite sides, and a fixed plate 12 is hinged in each hinge groove 111; the lifting mechanism 2 is arranged on the fixed slide rail 1 and is used to lift the belt; the lifting mechanism 2 comprises a sliding bar 21, a first hydraulic rod 22 and a first bidirectional telescopic plate 23; a strip-shaped through groove 13 is arranged on one side along the length direction at the bottom center of the fixed slide rail 1, and there are two sliding bars 21, and both sliding bars 21 are slidably arranged In the strip-shaped through groove 13, each sliding bar 21 is provided with a first hydraulic rod 22, and both ends of the first two-way telescopic plate 23 are respectively connected to the corresponding first hydraulic rod 22, and both ends of the first two-way telescopic plate 23 are hinged with second two-way telescopic plates 24, and each second two-way telescopic plate 24 is provided with a ball joint seat 241 at one end away from the first two-way telescopic plate 23, and each sliding block 11 is provided with an extension column 112 on the side close to the first hydraulic rod 22, and two strip-shaped avoidance grooves 14 for avoiding the extension column 112 are provided on the fixed slide rail 1; each extension column 112 is provided with a second hydraulic rod 113 at one end away from the corresponding sliding block 11, A ball head 114 is provided at one end of each second hydraulic rod 113 away from the corresponding extension column 112, and the ball head 114 is hinged to the corresponding ball joint seat 241. The first two-way telescopic plate 23 and the two second two-way telescopic plates 24 are both rotatably provided with a two-way telescopic cylinder 25; guide plates 231 are provided at both ends of the side of the first two-way telescopic plate 23 close to the fixed slide rail 1, and guide grooves 232 are provided on the opposite sides of each guide plate 231. The middle replacement mechanism 3 is arranged between the two guide plates 231 and is used to replace the roller 52 in the middle position; the middle replacement mechanism 3 includes two sliding parts arranged in the corresponding guide grooves 232 The limit blocks 31 are provided with rectangular notches 311 on the opposite sides of each limit block 31, and a strip notch 312 connected to the rectangular notch 311 is provided at the bottom of the outer wall of one side of each limit block 31, a limit plate 32 is slidably provided in the strip notch 312, and a lower pressure plate 33 is also slidably provided in the rectangular notch 311, and a lower pressure spring 331 is provided between the lower pressure plate 33 and the inner wall of the rectangular notch 311; an L-shaped avoidance strip 313 is provided on the outer wall of one side of each limit block 31 away from the strip notch 312, and a temporary storage plate 314 for placing the roller 52 is provided at one end of each L-shaped avoidance strip 313 away from the corresponding limit block 31.

[0040] In the prior art, a plurality of roller frames 51 are provided on the belt conveyor 5. In order to better transport the coal, the rollers 52 are provided on the roller frames 51 in an inverted isosceles trapezoidal shape, so that the two ends of the belt can be tilted at a certain angle, which guides the coal and prevents it from falling. In addition, blocks 521 are rotatably provided at both ends of the rollers 52, and a slot 511 cooperating with the block 521 is provided on the roller frames 51. The block 521 cooperates with the slot 511 to achieve quick disassembly and fixation of the rollers 52.

[0041] Based on this situation, due to the different specifications of the belt conveyor 5, the sizes of the rollers 52 that need to be replaced are also different. The rollers 52 to be replaced are placed between the two limit blocks 31, and the positions of the two sliding bars 21 are adjusted to make the two sliding bars 21 close to each other, so that the blocks 521 at both ends of the rollers 52 to be replaced can be located in the rectangular notches 311 of the corresponding limit blocks 31. At this time, the downward pressure spring 331 is squeezed to generate elastic force, so that the lower pressure plate 33 can be close to the block 521, which can not only limit the rollers 52 of different specifications, but also make the three bidirectional telescopic cylinders 25 as close to the shape of the original roller frame 51 as possible, thereby preventing the coal mine from falling during transportation; through the cooperation of the first hydraulic rod 22 and the second hydraulic rod 113, the first bidirectional telescopic plate 23 and the two second bidirectional telescopic plates 24 can be parallel to each other (such as Figure 2 As shown), it is convenient for the staff to place the fixed slide rail 1 on the frame 53 of the belt conveyor 5. Subsequently, by adjusting the positions of the two sliding blocks 11, the fixed plate 12 set in the hinge groove 111 can contact both sides of the frame 53 of the belt conveyor 5. At this time, the positions of the two second two-way telescopic plates 24 and the two-way telescopic cylinder 25 can be adjusted to adapt to belt conveyors 5 of different specifications. At this time, the fixed slide rail 1 is "integrally" connected to the frame 53 of the belt conveyor 5 to ensure the stability of the two-way telescopic cylinder 25 when it contacts the belt; subsequently, by adjusting the first hydraulic rod 22 and the second hydraulic rod 113, the two-way telescopic cylinder 25 set on the first two-way telescopic plate 23 and the second two-way telescopic plate 24 can be in the shape of an inverted isosceles trapezoid (as shown in FIG. Figure 3 As shown), the belt is lifted up, and at this time, the staff can replace the rollers 52 at both ends of the roller frame 51.

[0042] Further, when the idler 52 at the center of the idler bracket 51 needs to be replaced, during the process of the first double-direction telescopic plate 23 being pushed by the first hydraulic rod 22, the two limit blocks 31 move synchronously, so that the temporary storage plate 314 arranged on the limit blocks 31 can contact the idler 52 installed at the central position along with the movement of the first double-direction telescopic plate 23, so that the idler 52 at the center can be separated from the idler bracket 51, and the L-shaped avoidance strip 313 can avoid the idler bracket 51 to prevent volume collision between the limit blocks 31 and the idler bracket 51; when the first double-direction telescopic plate 23 moves to a suitable height (that is, when the lower end planes of the two limit blocks 31 are parallel to the top end of the idler bracket 51), by adjusting the limit plate 32 arranged on the corresponding limit block 31, the rectangular notch 311 is in an open state, and under the elastic force of the downward pressure spring 331, the limit blocks 31 at both ends of the idler 52 can be clamped in the clamping groove 511 of the idler bracket 51, thus completing the replacement of the intermediate idler 52 and avoiding the danger caused by the staff entering the belt conveyor 5.

[0043] Specifically, the opposite sides in this application refer to the sides close to each other.

[0044] As Figures 7 to 9 shown, the middle replacement mechanism 3 further includes a third hydraulic rod 34 and a double-direction telescopic rod 35; a sliding plate 315 is arranged on the back side of each limit block 31, and the sliding plate 315 is slidably arranged in the corresponding guide groove 232, and the two sliding plates 315 are connected to each other through the double-direction telescopic rod 35. A L-shaped mounting plate 233 is arranged at the center of the side of the first double-direction telescopic plate 23 close to the fixed slide rail 1, the third hydraulic rod 34 is arranged on the L-shaped mounting plate 233, and the actuator of the third hydraulic rod 34 passes through the L-shaped mounting plate 233 and is connected to the center of the double-direction telescopic rod 35; a C-shaped guiding plate 316 is arranged on the side of each limit block 31 close to the strip-shaped notch 312, the limit plate 32 is slidably arranged in the corresponding C-shaped guiding plate 316, and a pushing strip 321 is arranged at one end of each limit plate 32 close to the corresponding L-shaped avoidance strip 313.

[0045] When the intermediate idler 52 needs to be replaced, place the clamping block 521 at the end of the idler 52 in the rectangular notch 311 of the corresponding limit block 31. At this time, the clamping block 521 is located between the corresponding lower pressing plate 33 and the limit plate 32, and due to the elastic force of the lower pressing spring 331, it closely adheres to the limit plate 32. With the drive of the first hydraulic rod 22 and the second hydraulic rod 113, the first double telescopic plate 23 can move towards the belt direction. During this process, the temporary storage plate 314 is moved to the position below the idler 52 between the idler brackets 51 by the third hydraulic rod 34, so that the temporary storage plate 314 can remove the intermediate idler 52 from the idler bracket 51. Subsequently, make the lower end plane of the limit plate 32 parallel to the top end of the idler bracket 51. With the continuous drive of the third hydraulic rod 34, through the connection of the double telescopic rod 35, the two limit blocks 31 can move along the length direction of the guide groove 232, so that the pushing strip 321 provided on the limit plate 32 can contact the idler bracket 51, and the limit plate 32 can move inside the U-shaped guide plate 316, so that the rectangular notch 311 on the corresponding limit block 31 is in an open state. Under the action of the elastic force of the lower pressing plate 33 and the lower pressing spring 331, the clamping block 521 at the end of the idler 52 can be in contact with the idler bracket 51. During this process, with the continuous drive of the third hydraulic rod 34, the clamping block 521 at the end of the idler 52 can be engaged with the clamping groove 511 on the idler bracket 51, completing the replacement of the intermediate idler 52.

[0046] Furthermore, in order to facilitate the fixed slide rail 1 to be inserted into the belt conveyor 5, the first hydraulic rod 22, the second hydraulic rod 113 and the third hydraulic rod 34 are all multi-stage hydraulic rods, so as to reduce the length of the first hydraulic rod 22 and the second hydraulic rod 113 in the retracted state, and avoid the belt from contacting the parts provided on the fixed slide rail 1 when the fixed slide rail 1 is inserted into the belt conveyor 5.

[0047] It should be specifically noted that the背离 side in this application is the side that is far away from each other.

[0048] As Figures 7 to 10 shown, a side pressing strip 317 is slidably arranged in each rectangular notch 311. The length direction of the side pressing strip 317 is perpendicular to the length direction of the lower pressing plate 33. An extension groove 332 for avoiding the side pressing strip 317 is provided at the center of each lower pressing plate 33. A side pressing spring 3171 is also provided between the side of each side pressing strip 317 close to the strip-shaped notch 312 and the inner wall of the corresponding rectangular notch 311.

[0049] By providing the side pressure strip 317, under the elastic force of the side pressure spring 3171, the block 521 at the end of the roller 52 can be positioned secondary so that it can be located as far away from the strip-shaped groove 312 as possible. When the push strip 321 contacts the roller frame 51, as the limit plate 32 moves, the block 521 can contact the roller frame 51 as soon as possible, which not only ensures that the block 521 can contact the groove 511 of the roller frame 51, but also shortens the replacement time of the roller 52.

[0050] like Figures 8 to 10 As shown, a plurality of auxiliary rollers 3172 are provided along the length direction on one side of each side pressure strip 317 away from the strip-shaped notch 312 .

[0051] When the side pressure strip 317 contacts the block 521 at the end of the roller 52, the auxiliary roller 3172 is provided to reduce the friction between the side pressure strip 317 and the block 521, ensuring that the block 521 can move out of the rectangular groove 311 of the limit block 31 under the elastic force of the downward pressure spring 331.

[0052] like Figures 8 to 9 As shown, each temporary storage plate 314 is also provided with an inclined plate 3141 .

[0053] By providing the inclined plate 3141, not only can the roller 52 located in the middle position of the roller frame 51 be pushed down more effectively, but also the roller 52 can be guided to a certain extent so that it can stay on the temporary storage plate 314, thereby preventing it from sliding off the temporary storage plate 314.

[0054] like Figures 3 to 6 As shown, each fixed plate 12 is provided with hinge rods 121 at both ends, and each hinge groove 111 is provided with hinge holes 115 on the inner walls on both sides. The hinge rods 121 are rotatably arranged in the corresponding hinge holes 115, and each hinge rod 121 is also sleeved with a reset torsion spring 122; the fixed slide rail 1 is provided with reset rods 15 on the inner walls at both ends along the length direction, and each sliding block 11 is also provided with a rectangular avoidance groove 116 for avoiding the reset rod 15, and the rectangular avoidance groove 116 is connected to the corresponding hinge groove 111.

[0055] By providing a reset rod 15, when the fixed slide rail 1 needs to be moved, the two sliding blocks 11 move away from each other, so that the reset rod 15 can contact the fixed plate 12, so that the fixed plate 12 overcomes the elastic force of the corresponding reset spring and is set in a horizontal state. At this time, the fixed plate 12 is located inside the fixed slide rail 1, which is not only convenient for the staff to move the fixed slide rail 1, but also can easily insert the fixed slide rail 1 into the belt conveyor 5; when the fixed slide rail 1 needs to be fixed, with the movement of the two sliding blocks 11, the reset rod 15 can be separated from the corresponding fixed plate 12. At this time, under the torsion of the reset torsion spring 122, the fixed plate 12 can be set in a vertical state, thereby ensuring that the fixed plate 12 can accurately contact the frame 53 of the belt conveyor 5.

[0056] like Figure 4 , Figure 6 and Fig.11 As shown, an adjustment mechanism 4 for making two sliding blocks 11 or two sliding bars 21 approach and move away from each other is also provided at one end of the fixed slide rail 1; the adjustment mechanism 4 includes a first bidirectional screw rod 41, a second bidirectional screw rod 42 and a rectangular cover 43; the first bidirectional screw rod 41 and the second bidirectional screw rod 42 are both rotatably arranged in the fixed slide rail 1, the two ends of the first bidirectional screw rod 41 are respectively threadedly connected to the corresponding sliding block 11, and the two ends of the second bidirectional screw rod 42 are respectively threadedly connected to the corresponding sliding bar 21, and each sliding block 11 is provided with an avoidance hole 117 for avoiding the second bidirectional screw rod 42; the rectangular cover 43 is arranged at the end of the fixed slide rail 1, and the first bidirectional screw rod 41 and the second bidirectional screw rod 42 extend into the rectangular cover 43. An adjusting disk 44 is provided at one end inside the rectangular cover 43, and a polygonal slot 441 is provided at the center of each adjusting disk 44. A horizontal slide groove 431 is provided on the side of the rectangular cover 43 away from the fixed slide rail 1, and a horizontal block 432 is slidably provided in the horizontal slide groove 431. A rotating shaft 433 is rotatably provided at the center of the horizontal block 432. A polygonal plug-in block 434 cooperating with the polygonal slot 441 is provided at one end of the rotating shaft 433 extending into the rectangular cover 43, and a clamping spring 435 is also provided on the rotating shaft 433, and the clamping spring 435 is located between the polygonal plug-in block 434 and the horizontal block 432. A rotating handle 436 is provided at the end of the rotating shaft 433 away from the polygonal plug-in block 434.

[0057] Due to the limited space in the fixed slide rail 1, the distance between the first bidirectional screw rod 41 and the second bidirectional screw rod 42 is relatively close. In order to ensure that the first bidirectional screw rod 41 and the second bidirectional screw rod 42 can rotate relatively independently, adjustment disks 44 are provided at the ends of the first bidirectional screw rod 41 and the second bidirectional screw rod 42, and the two adjustment disks 44 are in the same horizontal plane.

[0058] Before replacing the roller 52, when the polygonal plug block 434 is connected to the adjustment disk 44 at the end of the second bidirectional screw rod 42, the position of the two sliding bars 21 can be adjusted by turning the handle 436 so that it can adapt to rollers 52 of different specifications. When the adjustment is completed, the rotating handle 436 is pulled outward to move the horizontal block 432 along the horizontal slide groove 431, so that the polygonal plug block 434 set on the rotating shaft 433 can be moved to the adjustment disk 44 near the end of the first bidirectional screw rod 41. At this time, under the elastic force of the clamping spring 435, the polygonal plug block 434 can be clamped with the corresponding polygonal slot 441. At this time, the position of the two sliding blocks 11 can be adjusted by turning the handle 436, so that the fixed slide rail 1 can be fixed on the frame 53 of the belt conveyor 5.

[0059] like Figure 4 As shown, each fixing plate 12 is also provided with a shock absorbing pad 123 .

[0060] By providing the shock-absorbing pad 123 , not only the friction between the fixed plate 12 and the frame 53 can be improved, but also the vibration effect of the fixed slide rail 1 can be reduced, thereby increasing the service life of the fixed slide rail 1 .

[0061] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A roller replacement device for a coal mine belt conveyor, characterized in that: It includes a fixed slide rail, a jacking mechanism and a middle replacement mechanism; Two sliding blocks are slidably arranged in the fixed slide rail. Hinge grooves are arranged on the opposite sides of each sliding block, and fixing plates are hinged in each hinge groove. The jacking mechanism is arranged on the fixed slide rail and is used for jacking up the belt. The jacking mechanism includes a sliding bar, a first hydraulic rod and a first double-direction telescopic plate; A strip-shaped through groove is arranged on one side of the center of the bottom of the fixed slide rail along the length direction. There are two sliding bars, and both sliding bars are slidably arranged in the strip-shaped through groove. A first hydraulic rod is arranged on each sliding bar. The two ends of the first double-direction telescopic plate are respectively connected to the corresponding first hydraulic rods. Second double-direction telescopic plates are hinged at both ends of the first double-direction telescopic plate. A spherical hinge seat is arranged at one end of each second double-direction telescopic plate away from the first double-direction telescopic plate. An extension column is arranged on one side of each sliding block close to the first hydraulic rod. Two strip-shaped avoidance grooves for avoiding the extension columns are arranged on the fixed slide rail; A second hydraulic rod is arranged at one end of each extension column away from the corresponding sliding block, and a ball head is arranged at one end of each second hydraulic rod away from the corresponding extension column. The ball head is hinged to the corresponding spherical hinge seat. Double-direction telescopic cylinders are rotatably arranged on the first double-direction telescopic plate and the two second double-direction telescopic plates; Guide plates are arranged at both ends of the first double-direction telescopic plate close to the fixed slide rail. Guide grooves are arranged on the opposite sides of each guide plate. The middle replacement mechanism is arranged between the two guide plates and is used for replacing the idler at the middle position. The middle replacement mechanism includes two limit blocks slidably arranged in the corresponding guide grooves. Rectangular notches are arranged on the opposite sides of each limit block. A strip-shaped notch communicated with the rectangular notch is arranged at the bottom of the outer wall of one side of each limit block. A limit plate is slidably arranged in the strip-shaped notch, and a lower pressing plate is also slidably arranged in the rectangular notch. A lower pressing spring is arranged between the lower pressing plate and the inner wall of the rectangular notch; An L-shaped avoidance strip is arranged on the outer wall of one side of each limit block away from the strip-shaped notch, and a temporary storage plate for placing the idler is arranged at one end of each L-shaped avoidance strip away from the corresponding limit block. The middle replacement mechanism also includes a third hydraulic rod and a double-direction telescopic rod; A sliding plate is arranged on the opposite side of each limit block, and the sliding plate is slidably arranged in the corresponding guide groove. The two sliding plates are connected to each other through a double-direction telescopic rod. An L-shaped mounting plate is arranged at the center of the side of the first double-direction telescopic plate close to the fixed slide rail. The third hydraulic rod is arranged on the L-shaped mounting plate, and the execution part of the third hydraulic rod passes through the L-shaped mounting plate and is connected to the center of the double-direction telescopic rod; A U-shaped guiding plate is arranged on one side of each limit block close to the strip-shaped notch. The limit plate is slidably arranged in the corresponding U-shaped guiding plate. A pushing bar is arranged at one end of each limit plate close to the corresponding L-shaped avoidance strip; An adjusting mechanism for making the two sliding blocks or the two sliding bars approach and move away from each other is also arranged at one end of the fixed slide rail; The adjusting mechanism includes a first double-direction screw rod, a second double-direction screw rod and a rectangular cover; The first bidirectional screw rod and the second bidirectional screw rod are both rotatably arranged in the fixed slide rail, the two ends of the first bidirectional screw rod are respectively threadedly connected to the corresponding sliding block, the two ends of the second bidirectional screw rod are respectively threadedly connected to the corresponding sliding bar, and each sliding block is provided with an avoidance hole for avoiding the second bidirectional screw rod; The rectangular cover is arranged at the end of the fixed slide rail, and the ends of the first bidirectional screw rod and the second bidirectional screw rod extending into the interior of the rectangular cover are both provided with adjustment disks, and a polygonal slot is arranged at the center of each adjustment disk, and a horizontal slide groove is arranged on the side of the rectangular cover away from the fixed slide rail, and a horizontal block is slidingly arranged in the horizontal slide groove, and a rotating shaft is rotatably arranged at the center of the horizontal block, and a polygonal plug block matching the polygonal slot is arranged at the end of the rotating shaft extending into the rectangular cover, and a clamping spring is also arranged on the rotating shaft, and the clamping spring is located between the polygonal plug block and the horizontal block, and a rotating handle is arranged at the end of the rotating shaft away from the polygonal plug block.

2. The roller replacement device for a coal mine belt conveyor according to claim 1, characterized in that: A side pressure strip is slidably arranged in each rectangular notch, and the length direction of the side pressure strip is perpendicular to the length direction of the lower pressure plate. An extension groove for avoiding the side pressure strip is arranged at the center of each lower pressure plate. A side pressure spring is also arranged between the side of each side pressure strip close to the strip-shaped notch and the inner wall of the corresponding rectangular notch.

3. The roller replacement device for a coal mine belt conveyor according to claim 2, characterized in that: A plurality of auxiliary rollers are arranged along the length direction on one side of each side pressure strip away from the strip-shaped notch.

4. The roller replacement device for a coal mine belt conveyor according to claim 1, characterized in that: Each temporary storage board is also provided with an inclined plate.

5. The roller replacement device for a coal mine belt conveyor according to claim 1, characterized in that: Each fixing plate is provided with hinge rods at both ends, and hinge holes are provided on the inner walls of both sides of each hinge groove. The hinge rods are rotatably arranged in the corresponding hinge holes, and each hinge rod is also provided with a reset torsion spring. The inner walls at both ends of the fixed slide rail along the length direction are provided with reset rods, and each sliding block is also provided with a rectangular avoidance groove for avoiding the reset rod, and the rectangular avoidance groove is communicated with the corresponding hinge groove.

6. The roller replacement device for a coal mine belt conveyor according to claim 1, characterized in that: Each fixing plate is also provided with a shock absorbing pad.

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