A tensioning device for a long-distance belt conveyor

Abstract

This invention relates to the field of belt conveyors and discloses a tensioning device for a long-distance belt conveyor, comprising a tensioning trolley and a tower counterweight device. The tensioning device includes a braking drum mechanism disposed between the tensioning trolley and the tower counterweight device. The braking drum mechanism includes a support bracket fixed to the ground, a drum for winding multiple turns of steel wire rope, and a braking mechanism for braking the drum. The support bracket has two suspended extension ends, the drum is rotatably disposed between the two suspended extension ends, and the braking mechanism is disposed at one end of the drum's axial direction. This tensioning device, by adding a braking drum mechanism between the tensioning trolley and the tower counterweight device, brakes the steel wire rope when encountering instantaneous changes in tension, thus fixing the steel wire rope and preventing the tower counterweight device from overshooting or crashing to the ground.

Description

Technical Field

[0001] This invention relates to the field of belt conveyors, and more specifically to a tensioning device for a long-distance belt conveyor. Background Technology

[0002] With the development of belt conveyor technology and the maturation of manufacturing technology and design concepts for long-distance material conveying corridors, their application in coal transportation, hydropower projects, and the green sand and gravel industry is becoming increasingly widespread. In long-distance belt conveyors, the tensioning device is particularly important. The tensioning device for long-distance belt conveyors typically adopts a combined tensioning device with a relatively compact overall structure, primarily designed to address the elongation problem caused by conveyor belt creep.

[0003] In related technologies, traditional combined tensioning devices generally include a tensioning trolley, a tower counterweight device, and a tensioning winch, which are then connected by a steel wire rope. The tensioning winch provides tension, the tower counterweight device tightens the entire steel wire rope, and the tensioning trolley is used to connect and pull the belt conveyor.

[0004] However, belt conveyors may experience instantaneous tension fluctuations during startup, braking, and operation. These fluctuations can cause excessive forward and backward movement of the tensioning trolley, which in turn can cause the counterweight of the tower counterweight device to suddenly move upward or downward. If the tension change exceeds the adjustment range of the tower counterweight tensioning device, the counterweight may hit the top or the ground, posing a significant safety hazard. Summary of the Invention

[0005] This application provides a tensioning device for a long-distance belt conveyor. By adding a brake drum mechanism between the tensioning trolley and the tower counterweight device, the brake drum mechanism brakes when there is a momentary change in tension, fixing the wire rope and preventing the tower counterweight device from hitting the top or crashing to the ground.

[0006] This application discloses a tensioning device for a long-distance belt conveyor, comprising a tensioning trolley and a tower-type counterweight device, wherein the tensioning device includes:

[0007] The brake drum mechanism is located between the tensioning trolley and the tower counterweight device. The brake drum mechanism includes a support bracket fixed to the ground, a drum for winding multiple turns of steel wire rope, and a braking mechanism for braking the drum. The support bracket has two suspended protruding ends, the drum is rotatably disposed between the two suspended protruding ends, and the braking mechanism is disposed at one end of the drum in the axial direction.

[0008] Based on the above technical solution, the tensioning device includes a weight box installed in the tower-type weight device and a height sensor that monitors its own height. The height sensor signal is connected to the braking mechanism. The braking mechanism is in a braking state when the height value of the height sensor is lower than a first set value or higher than a second set value.

[0009] Based on the above technical solution, the braking mechanism adopts disc brake or drum brake.

[0010] Based on the above technical solution, the support bracket adopts a right-angled triangular bracket, one right-angled side of the right-angled triangular bracket is fixed to the ground, the two suspended protruding ends are set horizontally, and the rear ends of the two suspended protruding ends are vertically fixed to the other right-angled side.

[0011] Based on the above technical solution, the tensioning device also includes a fixed pulley block and a tensioning winch. The components of the tensioning device are arranged in the following order along the wire rope: tensioning trolley, fixed pulley block fixed to the ground, brake drum mechanism, tower-type counterweight device fixed to the ground, and tensioning winch fixed to the ground.

[0012] Based on the above technical solution, the tensioning device consists of a single wire rope, which is connected in series with the tensioning trolley, fixed pulley block, brake drum mechanism, tower-type counterweight device, and tensioning winch.

[0013] Based on the above technical solution, the tensioning device includes a trolley track, the tensioning trolley includes a trolley frame, the trolley frame is slidably disposed on the trolley track, a redirecting roller is disposed at the rear of the trolley frame, and the conveyor belt of the belt conveyor passes around the redirecting roller.

[0014] Based on the above technical solution, the tensioning trolley further includes a first pulley group, which is fixedly installed at the front of the trolley frame; the fixed pulley group includes a wheel bracket, a second pulley group, and a fixed pin, the wheel bracket is fixed to the ground, the fixed pin is fixed to the rear of the wheel bracket, and the second pulley group is fixed to the front of the wheel bracket; one end of the wire rope is fixed to the fixed pin, and the other end is fixed to the tensioning winch; a portion of the wire rope is repeatedly wound between the first pulley group and the second pulley group, and a portion of the wire rope is also wound on a drum.

[0015] Based on the above technical solution, the tensioning device further includes four redirecting pulleys for right-angle reversing of the wire rope. The four redirecting pulleys are a first redirecting pulley, a second redirecting pulley, a third redirecting pulley, and a fourth redirecting pulley. The first and second redirecting pulleys are disposed between the brake drum mechanism and the tower-type counterweight device. The third and fourth redirecting pulleys are respectively disposed on both sides of the tower-type counterweight device.

[0016] Based on the above technical solution, the tower-type counterweight device includes a tower and a counterweight box. The counterweight box is loaded with several counterweight blocks. Two spaced-apart third pulley groups are provided at the top of the tower. The steel wire rope between the two third pulley groups hangs down and connects to the counterweight box. The steel wire rope passes in sequence through a third redirecting pulley located at the bottom of the tower, a third pulley group located at the top of the tower, the counterweight box, another third pulley group located at the top of the tower, and a fourth redirecting pulley.

[0017] The beneficial effects of the technical solutions provided in this application include at least the following:

[0018] The tensioning device of this application includes a brake drum mechanism between the tensioning trolley and the tower counterweight device. This brake drum mechanism comprises a braking mechanism, a drum, and a support bracket. The support bracket is fixed to the ground, and the drum is wound with multiple turns of steel wire rope. When the belt conveyor experiences instantaneous tension changes during startup, braking, and operation, the brake drum engages to brake and secure the steel wire rope, preventing the tower counterweight device from overshooting or crashing to the ground. This method is safe and reliable, and compared to conventional combined tensioning devices, it effectively prevents the tower counterweight device from overshooting or crashing to the ground. Furthermore, the tensioning device of this application can monitor the height of the counterweight box of the tower counterweight device in real time using a height sensor when encountering instantaneous tension changes. If the height is abnormal, the brake drum mechanism engages to brake, preventing the tower counterweight device from overshooting or crashing to the ground and improving the safety performance of the tensioning device. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A top view of the tensioning device provided in the embodiments of this application;

[0021] Figure 2 for Figure 1 Top view;

[0022] Figure 3 A schematic diagram of the braking drum mechanism provided in an embodiment of this application;

[0023] Figure 4 for Figure 3 Top view;

[0024] Figure 5 This is a top view of the tower-type counterweight device provided in the embodiments of this application;

[0025] In the picture:

[0026] 1. Tensioning trolley; 101. First pulley block; 102. Redirecting roller; 103. Trolley frame;

[0027] 2. Fixed pulley block; 21. Fixed pin; 22. Second pulley block; 23. Pulley block bracket;

[0028] 3. Braking drum mechanism; 31. Braking mechanism; 32. Drum; 33. Support bracket;

[0029] 4. First redirecting pulley; 5. Second redirecting pulley; 6. Third redirecting pulley;

[0030] 7. Tower-type counterweight device; 71. Third pulley block; 72. Counterweight box; 73. Counterweight block; 74. Tower frame; 75. Maintenance ladder;

[0031] 8. Fourth redirecting pulley; 9. Tensioning winch; 10. Wire rope; 11. Trolley track. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0033] This application provides a tensioning device for a long-distance belt conveyor. By adding a brake drum mechanism between the tensioning trolley and the tower counterweight device, when encountering instantaneous tension changes, the brake drum mechanism first passively brakes by friction and then actively brakes, so as to ensure that the tensioning device can effectively cope with the instantaneous tension changes during the operation of the conveyor and avoid the tower counterweight device from hitting the top or crashing to the ground.

[0034] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this application discloses a tensioning device for a long-distance belt conveyor, comprising a tensioning trolley 1 and a tower-type counterweight device 7.

[0035] The tensioning device includes a brake drum mechanism 3, which is positioned between the tensioning trolley 1 and the tower counterweight device 7. The brake drum mechanism 3 includes a braking mechanism 31, a drum 32, and a support bracket 33. The support bracket 33 is fixed to the bottom surface. The drum 32 is wound with multiple turns of steel wire rope 10. The braking mechanism 31 is used to brake the drum 32.

[0036] The support bracket 33 has two suspended extended ends, and the drum 32 is rotatably disposed between the two suspended extended ends. The braking mechanism 31 is disposed at one end of the drum 32 in the axial direction. The braking mechanism 31 can actively brake the drum 32, so that the rotatable drum remains in a fixed state.

[0037] The tensioning device of this application includes a brake drum mechanism 3 between the tensioning trolley 1 and the tower-type counterweight device 7. The brake drum mechanism 3 includes a braking mechanism 31, a drum 32, and a support bracket 33. The support bracket 33 is fixed to the ground, and the drum 32 is wound with multiple turns of steel wire rope 10. When the belt conveyor may experience instantaneous tension changes during startup, braking, and operation, the brake drum mechanism brakes and fixes the steel wire rope to prevent the tower-type counterweight device from overshooting or hitting the ground. It is safe and reliable, and compared with conventional combined tensioning devices, it can effectively prevent the tower-type counterweight device from overshooting or hitting the ground.

[0038] Furthermore, in one embodiment, the tensioning device includes a height sensor disposed in the weight box 72 of the tower-type weight device 7 and monitoring the height of the weight box 72. The height sensor signal is connected to the braking mechanism 31, and the braking mechanism 31 is in a braking state when the height value of the height sensor is lower than a first set value or higher than a second set value.

[0039] Specifically, if the height sensor reading is lower than the first set value, there is a risk of the vehicle hitting the ground, so braking is applied; if the height sensor reading is higher than the second set value, there is a risk of the vehicle hitting the top, so braking is applied in the same way.

[0040] Preferably, the tensioning device further includes a controller, which is connected to the height sensor and the braking mechanism 31. When the height value of the height sensor is lower than the first set value or higher than the second set value, the controller acquires the height data and controls the braking mechanism 31 to brake, preventing the tower-type counterweight device from hitting the top or the ground.

[0041] The tensioning device of this application can obtain the weight box 72 of the tower-type weight device 7 in real time through the height sensor when the tension changes instantaneously, and brake the drum mechanism when the height is abnormal, so as to avoid the tower-type weight device from hitting the top or hitting the ground, thereby improving the safety performance of the tensioning device.

[0042] Furthermore, in one embodiment, the braking mechanism 31 employs a disc brake or a drum brake.

[0043] Preferably, the braking mechanism 31 may also employ other devices that apply equivalent torque, such as a motor, to provide a reverse torque for braking.

[0044] Furthermore, such as Figure 3As shown, in one embodiment, the support bracket 33 is a right-angled triangular bracket. One right-angled side of the right-angled triangular bracket is fixed to the ground, the two suspended protruding ends are set horizontally, and the rear ends of the two suspended protruding ends are vertically fixed to the other right-angled side.

[0045] Furthermore, such as Figure 1 and Figure 2 As shown, the tensioning device also includes a fixed pulley block 2 and a tensioning winch 9. The components of the tensioning device are arranged in the following order along the wire rope: tensioning trolley 1, fixed pulley block 2, brake drum mechanism 3, tower-type counterweight device 7, and tensioning winch 9.

[0046] Among them, the tensioning trolley 1 slides along the trolley track 11, the fixed pulley block 2 is fixed to the ground, the brake drum mechanism 3 is fixed to the ground, the tower-type counterweight device 7 is fixed to the ground, and the tensioning winch 9 is fixed to the ground.

[0047] Furthermore, the tensioning device consists of a single wire rope 10, which is connected in series with the tensioning trolley 1, the fixed pulley block 2, the brake drum mechanism 3, the tower-type counterweight device 7, and the tensioning winch 9.

[0048] Furthermore, the tensioning device includes a trolley track 11, and the tensioning trolley 1 includes a trolley frame 103. The trolley frame 103 is slidably mounted on the trolley track 11, and a redirecting roller 102 is provided at the rear of the trolley frame 103. The conveyor belt of the belt conveyor passes around the redirecting roller 102. When the tensioning trolley 1 moves forward, the redirecting roller 102 tensions the conveyor belt of the belt conveyor, and the tensioning trolley 1 is always in a tendency to be pulled forward by the wire rope, thus tautning the conveyor belt.

[0049] Furthermore, the tensioning trolley 1 also includes a first pulley block 101, which is fixedly mounted on the front of the trolley frame 103.

[0050] The fixed pulley block 2 includes a pulley block bracket 23, a second pulley block 22, and a fixed pin 21. The pulley block bracket 23 is fixed to the ground, the fixed pin 21 is fixed to the rear of the pulley block bracket 23, and the second pulley block 22 is fixed to the front of the pulley block bracket 23.

[0051] One end of the wire rope is fixed to the fixed pin 21, and the other end is fixed to the tensioning winch 9; a portion of the wire rope is repeatedly wound between the first pulley block 101 and the second pulley block 22, and a portion of the wire rope is wound multiple times on the drum 32.

[0052] Specifically, the number of pulleys in the first pulley block 101 and the second pulley block 22 can be increased or decreased depending on the specific project. The wire rope forms a fixed-ratio rope group through the first pulley block 101 and the second pulley block 22, and then the wire rope enters the braking drum mechanism 3.

[0053] Furthermore, such as Figure 2 As shown, in one embodiment, the tensioning device further includes four redirecting pulleys for right-angle reversing of the wire rope 10, namely the first redirecting pulley 4, the second redirecting pulley 5, the third redirecting pulley 6 and the fourth redirecting pulley 8.

[0054] The first redirecting pulley 4 and the second redirecting pulley 5 are disposed between the brake drum mechanism 3 and the tower-type counterweight device 7. The third redirecting pulley 6 and the fourth redirecting pulley 8 are disposed on both sides of the tower-type counterweight device 7.

[0055] Specifically, the wire rope between the tensioning trolley 1 and the first redirecting pulley 4 is parallel to the wire rope between the second redirecting pulley 5 and the tensioning winch 9 in the top view direction.

[0056] Both the first redirecting pulley 4 and the second redirecting pulley 5 redirect the wire rope at right angles.

[0057] Furthermore, the tower-type counterweight device 7 includes a tower 74 and a counterweight box 72. The counterweight box 72 is filled with several counterweights 73. Two spaced-apart third pulley blocks 71 are provided at the top of the tower 74. A steel wire rope hangs down between the two third pulley blocks 71 and connects to the counterweight box 72. The steel wire rope hanging down between the two third pulley blocks 71 is connected to the counterweight box 72 through a movable pulley.

[0058] The steel wire rope 10 passes in sequence through the third redirecting pulley 6 at the bottom of the tower 74, a third pulley block 71 at the top of the tower 74, a counterweight box 72, another third pulley block 71 at the top of the tower 74, and the fourth redirecting pulley 8.

[0059] Specifically, the tension of the tower-type counterweight device 7 is provided by the counterweight block 73, which is placed in the counterweight box 72, and the wire rope is finally connected to the tensioning winch 9.

[0060] Preferably, the tower frame 74 of the tower-type counterweight device 7 is provided with a maintenance ladder 75 in the vertical direction.

[0061] The working process of the tensioning device includes:

[0062] When installing the conveyor belt, the entire tensioning device is in a relaxed state. The tensioning winch 9 releases the wire rope 10 until the counterweight box 72 in the tower counterweight device 7 falls onto the temporary support frame. The braking mechanism 31 in the braking drum mechanism 3 is in a non-braking state, and the tensioning trolley 1 can move freely to the installation position.

[0063] During operation, a counterweight block 73 of appropriate weight is placed in the counterweight box 72, the tensioning winch 9 tightens the wire rope 10, and the wire rope 10 pulls the tensioning trolley 1 until the counterweight box 72 is raised to the appropriate height.

[0064] When the belt conveyor experiences instantaneous tension changes during startup, braking, and operation, the height sensor in the counterweight box 72 reflects its own high-speed data. When the counterweight box 72 is too high or too low, the braking mechanism 31 in the braking drum mechanism 3 applies braking force. At this time, the braking mechanism 31 is in a braking state, the drum 32 of the braking drum mechanism 3 is fixed and cannot be rotated, and the counterweight box 72 no longer moves. Subsequently, by adjusting the tensioning winch 9 and the tensioning trolley 1, the braking force of the braking mechanism 31 is gradually released, and the system returns to normal operation.

[0065] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0066] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0067] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A tensioning device for long distance belt conveyors, comprising a tensioning trolley (1) and a tower weight device (7), characterized in that, The tensioning device includes: The brake drum mechanism (3) is located between the tension trolley (1) and the tower counterweight device (7). The brake drum mechanism (3) includes a support bracket (33) fixed to the ground, a drum (32) for winding multiple turns of steel wire rope (10), and a braking mechanism (31) for braking the drum (32). The support bracket (33) has two suspended protruding ends. The drum (32) is rotatably disposed between the two suspended protruding ends. The braking mechanism (31) is disposed at one end of the drum (32) in the axial direction.

2. A long distance belt conveyor tensioning device as claimed in claim 1, characterized in that: The tensioning device includes a weight box (72) disposed in the tower-type weight device (7) and a height sensor that monitors its own height. The height sensor signal is connected to the braking mechanism (31). The braking mechanism (31) is in a braking state when the height value of the height sensor is lower than a first set value or higher than a second set value.

3. The tensioning device for a long-distance belt conveyor as described in claim 1, characterized in that: The braking mechanism (31) adopts a disc brake or a drum brake.

4. The tensioning device for a long-distance belt conveyor as described in claim 1, characterized in that: The support bracket (33) adopts a right-angled triangular bracket. One right-angled side of the right-angled triangular bracket is fixed to the ground, the two suspended protruding ends are set horizontally, and the rear ends of the two suspended protruding ends are vertically fixed to the other right-angled side.

5. A long distance belt conveyor tensioning device as claimed in claim 1, characterized in that: The tensioning device also includes a fixed pulley block (2) and a tensioning winch (9). The components of the tensioning device are arranged in the following order along the wire rope: tensioning trolley (1), fixed pulley block (2) fixed to the ground, braking drum mechanism (3), tower-type counterweight device (7) fixed to the ground, and tensioning winch (9) fixed to the ground.

6. The tensioning device for a long-distance belt conveyor as described in claim 5, characterized in that: The tensioning device consists of a single wire rope (10), which is connected in series with the tensioning trolley (1), the fixed pulley block (2), the brake drum mechanism (3), the tower-type counterweight device (7), and the tensioning winch (9).

7. The tensioning device for a long-distance belt conveyor as described in claim 6, characterized in that: The tensioning device includes a trolley track (11), the tensioning trolley (1) includes a trolley frame (103), the trolley frame (103) is slidably disposed on the trolley track (11), and a redirecting roller (102) is disposed at the rear of the trolley frame (103), and the conveyor belt of the belt conveyor passes around the redirecting roller (102).

8. The tensioning device for a long-distance belt conveyor as described in claim 7, characterized in that: The tensioning trolley (1) also includes a first pulley group (101), which is fixedly disposed at the front of the trolley frame (103); The fixed pulley block (2) includes a wheel block bracket (23), a second pulley block (22) and a fixed pin (21). The wheel block bracket (23) is fixed to the ground, the fixed pin (21) is fixed to the rear of the wheel block bracket (23), and the second pulley block (22) is fixed to the front of the wheel block bracket (23). One end of the wire rope is fixed to a fixed pin (21), and the other end is fixed to a tensioning winch (9); the middle part of the wire rope is repeatedly wound between the first pulley group (101) and the second pulley group (22), and the middle part of the wire rope is also wound on a drum (32).

9. A long distance belt conveyor tensioning device as claimed in claim 4, characterized in that: The tensioning device also includes four redirecting pulleys for right-angle reversal of the wire rope (10), namely the first redirecting pulley (4), the second redirecting pulley (5), the third redirecting pulley (6) and the fourth redirecting pulley (8). The first redirecting pulley (4) and the second redirecting pulley (5) are disposed between the brake drum mechanism (3) and the tower-type counterweight device (7); the third redirecting pulley (6) and the fourth redirecting pulley (8) are respectively disposed on both sides of the tower-type counterweight device (7).

10. A long distance belt conveyor tensioning device as claimed in claim 9, characterized in that: The tower-type counterweight device (7) includes a tower (74) and a counterweight box (72). The counterweight box (72) is loaded with several counterweights (73). Two spaced third pulley groups (71) are provided on the top of the tower (74). The steel wire rope between the two third pulley groups (71) hangs down and connects to the counterweight box (72). The wire rope (10) passes in sequence through the third redirecting pulley (6) at the bottom of the tower (74), a third pulley group (71) at the top of the tower (74), a counterweight box (72), another third pulley group (71) at the top of the tower (74), and the fourth redirecting pulley (8).

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