Tail tensioning device of belt conveyor

Abstract

The utility model discloses a tail tensioning device of a belt conveyor, and belongs to the technical field of material conveying. The tensioning mechanism comprises a tensioning device, a steel wire rope and a hydraulic device; the tensioning device comprises a tail shield, a bearing support, a guide wheel frame, a guide rail wheel and a bearing seat; two guide rails are arranged at the tail of the belt conveyor in parallel, and the tensioning device is connected to the two guide rails in a sliding mode. A guide roller is arranged at the tail part of the belt conveyor; shaft shoulder structures are arranged on the two sides of the guide roller located at the tail of the belt conveyor. A bearing is installed on the shaft shoulder structure and connected to a bearing support. On one hand, the guide roller at the tail part can be protected in the tensioning process, and on the other hand, the guide roller at the tail part can be stabilized in the tensioning process; the problem that the tensioning trolley deviates or shakes in the belt tensioning or belt deviation rectifying process is solved.

Description

Technical Field

[0001] This utility model belongs to the field of material conveying technology and relates to a belt conveyor, specifically a tail tensioning device for a belt conveyor. Background Technology

[0002] Belt conveyors are the most ideal and efficient continuous transportation equipment in coal mines. Compared with other transportation equipment, they have advantages such as long conveying distance, large carrying capacity, and continuous conveying. They are also reliable in operation and easy to automate and centrally control. They feature simple structure, stable operation, reliable operation, low energy consumption, minimal environmental pollution, and convenient management and maintenance. They can achieve continuous transportation under continuous loading conditions. However, as the conveying capacity of belt conveyors continues to increase, the length of the conveyor belt is constantly increasing, making the tension and starting performance of the conveyor new challenges.

[0003] The tail tensioning device of a belt conveyor is one of its crucial components. Its main function is to ensure sufficient tension on the conveyor belt, guaranteeing adequate friction between the belt and the drive rollers to prevent belt slippage and limiting belt sag between idlers, thus ensuring the normal operation of the conveyor. There are fixed tensioning devices, counterweight tensioning devices, and hydraulically automatic tensioning devices. The hydraulically automatic tensioning device consists of a hydraulic pump station, tensioning cylinders, an energy storage station, a control box, and accessories, adjusting the tension force through a hydraulic system. It is commonly used in large belt conveyors and its location is flexible and can be adjusted without affecting the normal operation of the belt conveyor.

[0004] However, the existing hydraulic automatic tensioning device has a relatively complex structure. During transportation, it cannot always ensure that the belt, tensioning carriage and tensioning buffer device are on the same horizontal line. Especially during belt tensioning or belt correction, the tensioning carriage is prone to deviation or shaking, which can cause the belt to run off track and tear. This not only reduces the service life of the belt and increases the possibility of belt breakage, but also increases unnecessary maintenance costs. Utility Model Content

[0005] This utility model overcomes the shortcomings of the prior art and proposes a tail tensioning device for a belt conveyor.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0007] A tail tensioning device for a belt conveyor includes a belt conveyor and a tensioning mechanism;

[0008] The tensioning mechanism includes a tensioning device, a wire rope, and a hydraulic device; the tensioning device includes a tail cover, a bearing support, a guide wheel frame, a guide wheel, and a bearing seat; two guide rails are arranged parallel to each other at the tail of the belt conveyor, and the tensioning device is slidably connected to the two guide rails.

[0009] The guide wheel frame includes steel components a, b, c, d, e, and f; steel components a and b are arranged in parallel, and each is located above a guide rail; a steel component d is provided at the front end of each of steel components a and b, and a steel component c is connected between the two steel components d; a pin hole is provided on steel component c; a rope roller is rotatably connected to the pin hole through a pin.

[0010] A steel component e is connected between the rear ends of steel component a and steel component b; steel components c and e are both perpendicular to steel components a and b; a steel component f is connected to the top middle position of steel components a and b respectively; four sets of bearing seats are arranged on the lower side of steel components a and b, and the bearing seats are connected to the guide wheel; a bearing support is fixedly connected to each of the two steel components f.

[0011] The belt conveyor is equipped with a guide roller at its tail end; shoulder structures are provided on both sides of the guide roller at the tail end of the belt conveyor; bearings are installed on the shoulder structures and the bearings are connected to bearing supports; the tail cover is connected to steel component a and steel component b, and is located between steel component c and steel component e; the tail cover is positioned above the guide roller at the tail end of the belt conveyor.

[0012] The hydraulic device is located on the side of the tensioning device away from the belt conveyor; the hydraulic device includes a hydraulic cylinder, a support, and a hydraulic cylinder rod; the hydraulic cylinder is fixed on the support, the movable pulley is pivotally connected to the hydraulic cylinder rod, the hydraulic cylinder rod is arranged inside the hydraulic cylinder, and the hydraulic cylinder is connected to the accumulator and the hydraulic pump station in pairs; a rope support is fixedly installed on the ground between the movable pulley and the tensioning device;

[0013] The wire rope starts from the electrically controlled winch, passes around the rope roller, then around the movable pulley, and is finally fixed to the rope seat.

[0014] Furthermore, the steel component d is connected to steel components a, b, and c by bolts.

[0015] Furthermore, the steel component e is connected to the steel components a and b by bolts.

[0016] Furthermore, the bearing support has two bolt holes at its bottom, and the bolt holes of the bearing support are connected to the steel component f by bolts.

[0017] Furthermore, the belt conveyor includes a conveyor belt, idler rollers, rollers, a drive unit, and a support frame; the idler rollers are connected to the support frame, and the support frame is fixed to the ground by a channel steel frame and outriggers.

[0018] Furthermore, the idler group includes multiple sets of idlers arranged in sequence, each set of idlers including a lower idler and two upper idlers arranged on both sides of the lower idler; the multiple sets of idlers are located below the conveyor belt; a set of rollers is respectively arranged at the head of the belt conveyor and the middle position of the channel steel frame.

[0019] Furthermore, the roller assembly includes a drive roller; the drive roller is connected to a drive device.

[0020] The beneficial effects of this utility model compared to the prior art are as follows:

[0021] The tensioning device described in this utility model can control the deflection within a certain range. When the belt conveyor is running, the tensioning device can increase the friction between the conveyor belt and the roller to prevent slippage and deviation. When the conveyor belt undergoes tension deformation under tension, the tensioning device can ensure the stability of the equipment.

[0022] This utility model, through the cooperation of the guide wheel frame and the guide rail, can protect the tail guide roller during the tensioning process. On the other hand, through the connection structure of the bearing support and the steel component f, the tail guide roller can be stabilized during the tensioning process. This solves the problem of the tensioning carriage deviating or shaking during belt tensioning or belt correction. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the tail tensioning device of the belt conveyor described in this utility model.

[0024] Figure 2 This is a schematic diagram showing the connection between the tensioning device and the guide roller at the tail.

[0025] Figure 3 This is a schematic diagram of the guide wheel frame described in this utility model.

[0026] Figure 4 This is a schematic diagram of the structure of the idler roller assembly described in this utility model.

[0027] Figure 5 This is a schematic diagram of the hydraulic device and the rope seat described in this utility model.

[0028] Figure label:

[0029] 1-Tensioning device, 10-Guide wheel frame, 101-Steel component a, 102-Steel component b, 103-Steel component c, 104-Pin hole, 105-Steel component d, 106-Steel component e, 107-Steel component f, 11-Tail guard, 12-Guide roller, 13-Guide rail wheel, 14-Bearing support, 15-Bearing seat, 16-Guide rail, 17-Pin, 18-Rope roller, 2-Idler roller assembly, 20-Upper idler roller, 21-Lower idler roller, 22-Support leg, 23-Channel steel frame, 24-Overflow plate, 3-Hydraulic device, 30-Hydraulic cylinder, 31-Support, 32-Hydraulic cylinder rod, 33-Moving pulley, 34-Pull rope seat, 4-Drive device. Detailed Implementation

[0030] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, this utility model will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it. The technical solution of this utility model will be described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0031] See Figures 1 to 5 This example provides a tail tensioning device for a belt conveyor, including a belt conveyor and a tensioning mechanism; the tensioning mechanism is located at the tail of the belt conveyor.

[0032] The belt conveyor includes a conveyor belt, idler rollers, drum sets, a drive unit 4, and steel components such as support frames, legs 22, and channel steel frames 23. Overflow guards 24 are arranged on both sides of the conveyor belt. The idler rollers consist of multiple sets of idlers arranged sequentially. Each set includes a lower idler roller 21 and two upper idler rollers 20 arranged on either side of the lower idler roller 21. These idler rollers are located below the conveyor belt to support and transport the goods. The idler rollers bear the weight of the goods and generate more than half of the resistance of the entire equipment. A drum set is located at the head of the belt conveyor and the middle of the channel steel frame 23. The drum set includes a drive drum and a guide drum 12. The conveyor belt passes around the drive drum and guide drum 12, forming a closed loop. The drive drum is connected to the drive unit 4. The drive unit 4 is a conventional mechanism, such as including a motor and a reducer, used to drive the drive drum to rotate. The rotation of the drive drum drives the conveyor belt, and the guide drum 12 guides the conveyor belt.

[0033] The tensioning mechanism includes a tensioning device 1, a wire rope, and a hydraulic device 3; the tensioning device 1 includes a tail cover 11, a bearing support 14, a guide wheel frame 10, a guide wheel 13, and a bearing seat 15. Two guide rails 16 are arranged in parallel at the tail of the belt conveyor, and the tensioning device 1 is slidably connected to the two guide rails 16.

[0034] Specifically, the guide wheel frame 10 includes: steel component a101, steel component b102, steel component c103, steel component d105, steel component e106, and steel component f107; steel component a101 and steel component b102 are arranged in parallel, and steel component a101 and steel component b102 are respectively located above a guide rail 16; a steel component d105 is respectively provided at the front end of steel component a101 and steel component b102, and a steel component c103 is connected between the two steel components d105, and the steel component d105 is bolted to steel component a101, steel component b102, and steel component c103; a pin hole 104 is arranged on steel component c103; a rope roller 18 is rotatably connected in the pin hole 104 through a pin 17; the pin 17 serves to fix the rope roller 18.

[0035] A steel component e106 is connected between the rear ends of steel components a101 and b102; and steel component e106 is bolted to steel components a101 and b102 respectively; steel components c103 and e106 are both perpendicular to steel components a101 and b102; a steel component f107 is connected to the top middle position of steel components a101 and b102 respectively. Four sets of bearings 15 are arranged on the lower side of steel components a101 and b102, and the bearings 15 are connected to the guide wheel 13, realizing the movement of the tensioning device 1 on the guide rail 16.

[0036] A bearing support 14 is fixedly connected to each of the two steel components f107; the bearing support 14 has two bolt holes at its bottom, and the bolt holes of the bearing support 14 are connected to the steel component f107 by bolts.

[0037] A guide roller 12 is also provided at the tail of the belt conveyor; shoulder structures are provided on both sides of the guide roller 12 located at the tail of the belt conveyor; bearings are installed on the shoulder structures and connected to the bearing supports 14; the tail cover 11 is connected to steel components a101 and b102 and is located between steel components c103 and e106; the tail cover 11 is set above the guide roller 12 located at the tail of the belt conveyor to protect it.

[0038] The hydraulic device 3 is located on the side of the tensioning device 1 away from the belt conveyor; the hydraulic device 3 includes a hydraulic cylinder 30, a support 31, and a hydraulic cylinder rod 32. The hydraulic cylinder 30 is fixed on the support 31, the movable pulley 33 is pivotally connected to the hydraulic cylinder rod 32, the hydraulic cylinder rod 32 is arranged inside the hydraulic cylinder 30, and the hydraulic cylinder 30 is connected to the accumulator and the hydraulic pump station in pairs; a rope seat 34 is fixedly installed on the ground between the movable pulley 33 and the tensioning device 1.

[0039] The wire rope starts from the electrically controlled winch, passes around the rope roller 18, then around the movable pulley 33, and is finally fixed on the rope seat 34. The electrically controlled winch is used to tighten the wire rope, thereby tightening the conveyor belt.

[0040] The working principle of the tail tensioning device for a belt conveyor provided in this example is as follows:

[0041] Start-up phase: Before the belt conveyor is started, the hydraulic pump and pressure relief valve in hydraulic device 3 are opened in advance, and the hydraulic pump starts up under no-load conditions. After the hydraulic pump starts up under no-load conditions, the pressure relief valve is closed in time. At this time, the overflow valve opens to control the system pressure, and the hydraulic pump station pressurizes the hydraulic oil into the hydraulic cylinder 30, which pushes the hydraulic cylinder rod 32 to drive the pulley 33, thereby causing the tensioning device 1 to move, thus achieving the purpose of tensioning the conveyor belt. When the tensioning force applied to the conveyor belt by the tensioning mechanism reaches the starting tension force, the winch stops running and the pressure relief valve opens again.

[0042] Stable operation: Once the belt conveyor is running stably, the pressure relief valve in hydraulic device 3 starts to work, and the tensioning device is in normal tension. The accumulator is activated to prevent large fluctuations in the tension of the conveyor belt and to prevent impact when the conveyor is under load or when the system leaks oil, thus ensuring the smooth operation of the conveyor.

[0043] Braking phase: During the braking of the belt conveyor, the tensioning force output by the tensioning mechanism is the same as the pressure required when stopping. The hydraulic pump station presses hydraulic oil from the other side of the hydraulic cylinder 30, pushing the hydraulic cylinder rod 32 to drive the pulley 33, causing the tensioning device 1 to move. At the same time, the winch reverses, and the tension force on the conveyor belt decreases. When the tension force of the conveyor belt decreases to the tension required when stopping, the winch stops running and the tensioning device stops operating.

[0044] The above description is a further detailed explanation of the present invention in conjunction with specific preferred embodiments. It should not be considered that the specific embodiments of the present invention are limited to this. For those skilled in the art, several simple deductions or substitutions can be made without departing from the present invention, and all such deductions or substitutions should be considered to fall within the scope of patent protection determined by the submitted claims.

Claims

1. A tail tensioning device for a belt conveyor, characterized in that, Includes belt conveyors and tensioning mechanisms; The tensioning mechanism includes a tensioning device (1), a wire rope, and a hydraulic device (3); the tensioning device (1) includes a tail cover (11), a bearing support (14), a guide wheel frame (10), a guide wheel (13), and a bearing seat (15); two guide rails (16) are arranged parallel to each other at the tail of the belt conveyor, and the tensioning device (1) is slidably connected to the two guide rails (16); The guide wheel frame (10) includes steel components a (101), b (102), c (103), d (105), e (106), and f (107); steel components a (101) and b (102) are arranged in parallel, and each of them is located above a guide rail (16); a steel component d (105) is provided at the front end of each of steel components a (101) and b (102), and a steel component c (103) is connected between the two steel components d (105). A pin hole (104) is arranged on the steel component c (103); a rope roller (18) is rotatably connected in the pin hole (104) through a pin (17). A steel component e (106) is connected between the rear ends of steel component a (101) and steel component b (102); steel components c (103) and e (106) are perpendicular to steel components a (101) and b (102); a steel component f (107) is connected to the middle of the top of steel components a (101) and b (102); four sets of bearing seats (15) are arranged on the lower side of steel components a (101) and b (102), and the bearing seats (15) are connected to the guide wheel (13); a bearing support (14) is fixedly connected to each of the two steel components f (107). A guide roller (12) is provided at the tail of the belt conveyor; shoulder structures are provided on both sides of the guide roller (12) at the tail of the belt conveyor; bearings are installed on the shoulder structures and the bearings are connected to the bearing supports (14); the tail cover (11) is connected to steel component a (101) and steel component b (102) and is located between steel component c (103) and steel component e (106); the tail cover (11) is located above the guide roller (12) at the tail of the belt conveyor; The hydraulic device (3) is located on the other side of the tensioning device (1) away from the belt conveyor; the hydraulic device (3) includes a hydraulic cylinder (30), a support (31), a movable pulley (33), and a hydraulic cylinder rod (32); the hydraulic cylinder (30) is fixed on the support (31), the movable pulley (33) is pivotally connected to the hydraulic cylinder rod (32), the hydraulic cylinder rod (32) is arranged inside the hydraulic cylinder (30), and the hydraulic cylinder (30) is connected to the accumulator and the hydraulic pump station in pairs; a rope seat (34) is fixedly installed on the ground between the movable pulley (33) and the tensioning device (1). The wire rope starts from the electrically controlled winch, passes around the rope roller (18), then around the movable pulley (33), and is finally fixed on the rope seat (34).

2. The tail tensioning device for a belt conveyor according to claim 1, characterized in that, The steel component d (105) is bolted to steel components a (101), b (102) and c (103).

3. The tail tensioning device for a belt conveyor according to claim 1, characterized in that, The steel component e (106) is bolted to steel component a (101) and steel component b (102) respectively.

4. The tail tensioning device for a belt conveyor according to claim 1, characterized in that, The bearing support (14) has two bolt holes at the bottom, and the bolt holes of the bearing support (14) are connected to the steel component f (107) by bolts.

5. The tail tensioning device for a belt conveyor according to claim 1, characterized in that, The belt conveyor includes a conveyor belt, idler rollers, rollers, a drive unit (4), and a support frame; the idler rollers are connected to the support frame, and the support frame is fixed to the ground by a channel steel frame (23) and legs (22).

6. The tail tensioning device for a belt conveyor according to claim 5, characterized in that, The idler group includes multiple sets of idlers arranged in sequence. Each set of idlers includes a lower idler (21) and two upper idlers (20) arranged on both sides of the lower idler (21). The multiple sets of idlers are located below the conveyor belt. A set of rollers is respectively arranged at the head of the belt conveyor and the middle position of the channel steel frame (23).

7. The tail tensioning device for a belt conveyor according to claim 6, characterized in that, The roller assembly includes a drive roller; the drive roller is connected to a drive device (4).

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