CN212402460U - Tensioning device and equipment with same - Google Patents

Abstract

The utility model relates to a belt conveyor technical field, concretely relates to straining device and have its equipment. The tension device includes: the driving roller frame is provided with at least two direction-changing rollers; the tensioning frame is arranged on one side of the driving roller frame; the tensioning trolley is arranged on the tensioning frame, and a tensioning roller is arranged on the tensioning trolley and is suitable for winding one end of the conveying belt; the tower frame is arranged on one side of the tensioning frame, the heavy hammer box is arranged on the tower frame, and the heavy hammer box is connected with the tensioning trolley through a tensioning rope and used for driving the tensioning trolley to slide relative to the tensioning frame; at least one towing device is arranged on the tensioning frame, is positioned between the driving roller frame and the tensioning trolley and is suitable for bearing the conveying belt. Through set up the traction device on taut frame, can bear the weight of the conveyer belt between driving roller frame and the taut dolly, prevent that the conveyer belt from drooping when taut dolly slides certain distance relative to driving roller frame, guaranteed the normal use of conveyer belt.

Description

Tensioning device and equipment with same

Technical Field

The utility model relates to a belt conveyor technical field, concretely relates to straining device and have its equipment.

Background

In order to make the transmission roller give enough tension to the belt to ensure that the belt does not slip on the transmission roller and the conveying belt does not excessively sag between two adjacent supporting rollers in the use process of the belt conveyor, an initial tension is applied to the conveying belt, the initial tension is obtained by tensioning the conveying belt by a tensioning device of the belt conveyor, and meanwhile, the effective tension of the belt is ensured by the tensioning device in the use process.

Tensioning device among the prior art generally includes the driving roller frame, taut dolly, the weight case on pylon and locating the pylon, driving roller through the driving roller frame bears the belt, the driving roller of taut dolly bears the one end of belt, taut dolly still links to each other with the weight case through wire rope and pulley, the upper and lower position pulling tensioning dolly through control weight case slides, and then the tension of adjusting the belt, but the tensioning device of this structure is when being used for the long distance, when the belt feeder of heavy freight volume, when taut dolly is far away with the driving roller frame, can make the belt between the two flagging, influence normal use.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the defect that drooping phenomenon still can appear in the belt when straining device among the prior art is used for the belt feeder of long distance, heavy freight volume, influence normal use to provide one kind can be applicable to the belt feeder of long distance, heavy freight volume, and can guarantee the straining device of belt normal use.

In order to achieve the above object, the present invention provides in a first aspect a tensioning device comprising:

the driving roller frame is provided with at least two direction-changing rollers, and the at least two direction-changing rollers are suitable for being respectively wound on two sides of the conveying belt;

the tensioning frame is arranged on one side of the driving roller frame;

the tensioning trolley is arranged on the tensioning frame, a tensioning roller is arranged on the tensioning trolley, and the tensioning roller is suitable for winding one end of the conveying belt;

the tower is arranged on one side of the tensioning frame, a heavy hammer box is arranged on the tower, and the heavy hammer box is connected with the tensioning trolley through a tensioning rope and is used for driving the tensioning trolley to slide relative to the tensioning frame;

and the at least one dragging device is arranged on the tensioning frame, is positioned between the driving roller frame and the tensioning trolley and is suitable for bearing the conveying belt.

Further, the towing apparatus comprises:

a tow body;

the upper ends of the carrier rollers are suitable for respectively bearing two sides of the conveying belt.

Further, the towing device further comprises:

and the towing guide chain is connected to the towing body, one end of the towing guide chain is fixed on the tensioning frame, and the other end of the towing guide chain is fixed on the tensioning trolley.

Further, the towing device further comprises:

and the moving piece is arranged on the towing body and is suitable for driving the towing body to slide relative to the tensioning frame when the tensioning trolley slides relative to the tensioning frame.

Further, the tension device further includes:

and the towing guide rail is fixedly connected to the tensioning frame and is provided with the moving piece.

Further, the tow guide rail is arranged close to the gravity center of the tow body.

Furthermore, a plurality of rings are arranged on the tensioning frame at intervals, and the towing guide chain is arranged in the rings in a penetrating mode.

Further, the drive roller frame includes:

a rack body;

and the at least two transmission roller seats are arranged in the frame body, and each transmission roller seat is fixedly provided with one turnabout roller.

Furthermore, each transmission roller seat is obliquely arranged in the frame body, and the oblique direction of each transmission roller seat is parallel to the resultant force direction of the conveying belt wound by the bend pulley.

Further, the upper end of the frame body is fixedly connected with at least two clamping devices, and the clamping devices are suitable for clamping two sides of the conveying belt.

Further, the tension device further includes:

the pulley block is arranged on the tower and connected with the heavy hammer box, and the tensioning rope is wound on the pulley block.

Further, the pulley block includes:

the three fixed pulleys are fixedly arranged at the upper end of the tower frame, and the tensioning rope is wound on the fixed pulleys;

and the two movable pulleys are wound with the tensioning ropes and are connected with the heavy hammer box.

Further, the tension device further includes:

the electric reel is arranged on one side of the tower, a disc brake is connected to the electric reel in a matching mode, and the electric reel is connected with the pulley block through the tensioning rope.

A second aspect of the present invention provides an apparatus having a tensioning device, comprising a belt conveyor and a tensioning device connected thereto.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a tensioning device, include: the driving roller frame is provided with at least two direction-changing rollers, and the at least two direction-changing rollers are suitable for being respectively wound on two sides of the conveying belt; the tensioning frame is arranged on one side of the driving roller frame; the tensioning trolley is arranged on the tensioning frame, a tensioning roller is arranged on the tensioning trolley, and the tensioning roller is suitable for winding one end of the conveying belt; the tower is arranged on one side of the tensioning frame, a heavy hammer box is arranged on the tower, and the heavy hammer box is connected with the tensioning trolley through a tensioning rope and is used for driving the tensioning trolley to slide relative to the tensioning frame; and the at least one dragging device is arranged on the tensioning frame, is positioned between the driving roller frame and the tensioning trolley and is suitable for bearing the conveying belt.

When the belt conveyor is used, the driving roller frame is connected with a conveying belt on the belt conveyor, one end of the conveying belt is arranged on the conveyor, two sides of the conveying belt are respectively wound on the turnabout drums of the driving roller frame, the other end of the conveying belt is wound on the tensioning rollers of the tensioning trolley, the tensioning trolley is further connected with the heavy hammer box on the tower through the tensioning rope, the relative height position of the heavy hammer box on the tower can pull the tensioning trolley to relatively tension the frame to slide through the tensioning rope, even if the belt conveyor is applied to long-distance and large-capacity belt conveyors, at least one towing device is further arranged on the tensioning frame, the towing device can bear the conveying belt between the driving roller frame and the tensioning trolley, when the tensioning trolley slides for a certain distance relative to the driving roller frame, the conveying belt sags, and the normal use.

2. The utility model provides a tensioning device through setting up the towing device to including towing body and bearing roller, the upper end of every bearing roller bears one side of conveyer belt, when guaranteeing to bear the weight of the conveyer belt, simple structure is practical.

3. The utility model provides a tensioning device is through setting up the tow chain of leading for when taut dolly taut frame relatively slides, the tow chain of leading can take the tow device also taut frame relatively to slide, if set up to a plurality of at the tow device, can set up the tow device at the interval between taut dolly and driving roller frame, make every one section distance have a tow device to support the conveyer belt promptly, guarantee the supporting effect.

4. The utility model provides a tensioning device is through setting up the moving member on the towing device for the slip of towing device is more smooth and easy.

5. The utility model provides a tensioning device is through setting up the tow guide rail on taut frame for the tow device can remove along the tow guide rail, provides the guide effect for the tow device, makes the slip of tow device more stable.

6. The utility model provides a tensioning device sets up through the focus position that is close to the tow body with the tow guide rail, can prevent that the tow device from turning on one's side, guarantees the normal use of tow device, and need not to set up alone and prevent the device of turning on one's side, and the structure is simpler.

8. The utility model provides a tensioning device sets up in this internally through inclining every transmission roller seat, and the incline direction of every transmission roller seat is parallel rather than the resultant force direction of last winding conveyer belt, can make the fixing device on the transmission roller seat, like the bolt, only receive single shearing force, and can not receive pull-out force for the atress of transmission roller seat is more reasonable, has increased the life of bolt, safety and stability.

9. The utility model provides a tensioning device, through set up the assembly pulley on the pylon, the assembly pulley includes three fixed pulley and two movable pulleys, and 5 pulleys have constituted the assembly pulley of one set of two multiplying powers promptly for the taut stroke of weight case can reduce half, and the weight of corresponding weight case increases one time, has shortened the height of taut stroke and pylon greatly, makes overall structure compacter, has reduced economic cost simultaneously greatly.

10. The utility model provides a tensioning device is through setting up the electronic reel of taking disc brake for the position that electronic reel can automatic adjustment weight case, control tension and taut stroke, and during the maintenance, because electronic reel deposit has the taut rope, can place the weight case subaerial very conveniently, easy and simple to handle, safe controllable.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of the tension device of the present invention;

FIG. 2 is a partially enlarged schematic view of FIG. 1;

FIG. 3 is a front view of the towing attachment of the present invention;

FIG. 4 is a side view of the tow device of the present invention;

FIG. 5 is a partially enlarged schematic view of FIG. 2;

fig. 6 is a front view of the drive roller frame of the present invention.

Description of reference numerals:

1-driving the roller frame; 2-a direction-changing drum; 3, a belt; 4-tensioning the frame; 5, tensioning the trolley; 6-tensioning roller; 7-a tower; 8-weight box; 9-a towing device; 10-a tow body; 11-carrying rollers; 12-towing a guide chain; 13-a roller; 14-tow guide rails; 15-a lifting ring; 16-a frame body; 17-a driving roller seat; 18-an entrainment device; 19-a fixed pulley; 20-a movable pulley; 21-electric reel; 22-a steel wire rope; 23-a first redirecting stand; 24-a second direction changing seat; 25-drive the rollers.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 to 6, the present embodiment provides a tensioning device including:

the driving roller frame 1 is provided with at least two direction-changing rollers 2, and the at least two direction-changing rollers 2 are suitable for being respectively wound on two sides of the conveying belt; a tensioning frame 4 arranged on one side of the driving roller frame 1; the tensioning trolley 5 is arranged on the tensioning frame 4, a tensioning roller 6 is arranged on the tensioning trolley 5, and the tensioning roller 6 is suitable for winding one end of the conveying belt; the tower frame 7 is arranged on one side of the tensioning frame 4, the heavy hammer box 8 is arranged on the tower frame 7, and the heavy hammer box 8 is connected with the tensioning trolley 5 through a tensioning rope and used for driving the tensioning trolley 5 to slide relative to the tensioning frame 4; at least one towing device 9 is arranged on the tensioning frame 4, is positioned between the driving roller frame 1 and the tensioning trolley 5 and is suitable for bearing the conveying belt.

When in use, the driving roller frame 1 is connected with a conveyer belt on a conveyer belt conveyer, one end of the conveyer belt is arranged on the conveyer belt, two sides of the conveyer belt are respectively wound on the bend rollers 2 of the driving roller frame 1, wherein, because the conveyer belt is of an annular structure, two ends of the conveyer belt are respectively closed arc-shaped end parts, two sides of the conveyer belt refer to the conveyer belt which is connected with the arc-shaped middle part of the two ends and is used as a central line, the other end of the conveyer belt is wound on a tensioning roller 6 of a tensioning trolley 5, the tensioning trolley 5 is also connected with a heavy hammer box 8 on a tower frame 7 through a steel wire rope 22, the relative height position of the heavy hammer box 8 on the tower frame 7 can pull the tensioning trolley 5 to slide relative to a tensioning frame 4 through the steel wire rope 22, even if the conveyer belt is applied to a long-distance and large transportation volume conveyer belt machine, at least one towing device 9 is, the conveyer belt is prevented from sagging when the tensioning trolley 5 slides a certain distance relative to the driving roller frame 1, and the normal use of the conveyer belt is ensured.

In particular, the conveyor belt is a belt 3 in the form of polyurethane. In an alternative embodiment, the conveyor belt may be a wire-cored belt.

As shown in fig. 3 and 4, the towing device 9 includes: a tow body 10; the two carrier rollers 11 are respectively arranged at the upper end and the lower end of the towing body 10, and the upper ends of the two carrier rollers 11 are suitable for respectively bearing two sides of the belt 3. By arranging the towing device 9 to include the towing body 10 and the two carrier rollers 11, the upper end of each carrier roller 11 bears one side of the belt 3, so that the structure is simple and practical while bearing the belt 3. As an alternative embodiment, a plurality of idlers 11 may be provided on the towing device 9, for example, two or more idlers are provided at the upper end, and two or more idlers are provided at the lower end.

In the preferred embodiment, three towing devices 9 are arranged on the tensioning frame 4 at intervals, each towing device 9 is also connected with a towing guide chain 12, one end of each towing guide chain 12 is fixed on the tensioning frame 4, and the other end is fixed on the tensioning trolley 5. Through setting up the tow chain 12 for when taut dolly 5 slided relative taut frame 4, tow chain 12 can take towing gear 9 to also slide relative taut frame 4, if three towing gear 9 can set up together just beginning, at the in-process of taut dolly 5 pulling, accessible tow chain 12 will be from the nearest towing gear 9 pulling of taut dolly 5, then will farther towing gear 9 pulling, make and set up towing gear 9 at the interval between taut dolly 5 and driving roller frame 1, there is one towing gear 9 to support belt 3 promptly at every certain distance, guarantee the supporting effect. As an alternative embodiment, the towing means 9 can also be provided as one, two or more, or specifically depending on the towing distance. As an alternative embodiment, instead of the tow guide chains 12, a plurality of tow devices 9 may be arranged at intervals on the tensioning carriage 4, without the tow devices 9 sliding along the tensioning carriages 5.

In order to make the towing device 9 slide more smoothly, the towing device 9 further comprises at least one moving member, which is arranged on the towing body 10 and is suitable for driving the towing body 10 to slide relative to the tensioning frame 4 when the tensioning trolley 5 slides relative to the tensioning frame 4. Specifically, the moving members are rollers 13, and two towing devices 9 are provided for each towing device, and are respectively provided on two sides of the towing body 10. In an alternative embodiment, the moving member may be a slider.

In order to better guide the sliding of the towing installation 9, as shown in fig. 2, the tensioning device further comprises: and the towing guide rail 14 is fixedly connected to the tensioning frame 4, rollers 13 are arranged on the towing guide rail, and stoppers matched with the rollers 13 are arranged on two sides of the towing guide rail 14 to prevent the towing device 9 from turning over. As an alternative embodiment, the moving member may be moved directly on the tension frame 4 without providing the tow guide 14.

In a preferred embodiment, the towing guide rail 14 is arranged on the tensioning frame 4 and close to the gravity center position of the towing body 10, so that the towing device 9 can be prevented from side turning, the normal use of the towing device 9 is ensured, a side turning prevention device does not need to be arranged separately, and the structure is simpler. Specifically, the tow guide rail 14 is provided at a middle position in the height direction of the tow body 10. As an alternative embodiment, the tow guide 14 may be provided at the bottom of the tow body 10 or at another location.

As the tensioning device is better suitable for a long-distance belt conveyor, as shown in fig. 5, a plurality of hanging rings 15 are arranged on the tensioning frame 4 at intervals, and a towing guide chain 12 is arranged in the hanging rings 15 in a penetrating manner. Through setting up a plurality of rings 15 at the interval on taut frame 4, wear to be equipped with the tow in rings 15 and lead chain 12, can carry out better department's supporting role to tow guide chain 12, when preventing long distance conveyor belt 3, tow guide chain 12 piles up together, influences normal use. Specifically, a long and straight steel wire rope 22 in a tensioned state can be pulled at two ends of the tensioning frame 4, the steel wire rope 22 is connected with a through plate on each towing device 9, the hanging ring 15 is hung on the steel wire rope 22, the tensioning trolley 5 passes through the towing guide chain 12, the towing guide chain 12 is fixed on the through plate of the towing device 9, and a groove for supporting the steel wire rope 22 is arranged on the through plate to tow the steel wire rope. When the tensioning trolley 5 runs, the towing guide chain 12 between the tensioning trolley 5 and the towing device 9 is straightened, the tensioning trolley 5 and the towing device 9 run together, and then the towing device 9 which is not tensioned at the back is pulled in turn. As an alternative embodiment, a fastening bar may be provided on the tension frame 4, and a suspension ring 15 may be provided on the fastening bar.

The specific form of the drive roller frame 1 is many, and as shown in fig. 6, may include: a holder body 16; two transmission roller seats 17 are arranged in the frame body 16, and each transmission roller seat 17 is fixedly provided with a turnabout roller 2. Specifically, the direction-changing drum 2 may be fixedly disposed on the transmission drum base 17 by bolts. As an alternative embodiment, more drive roller holders 17 may be provided.

The driving roller 25 is fixedly connected to the outer side of the frame body 16, and is connected with a driving device such as a motor and a speed reducer, and the driving roller 25 is connected with one of the direction-changing rollers 2 in a winding manner through the belt 3 to provide driving force for the whole belt 3. Specifically, the driving roller 25 is fixedly connected to the outside of the rack body 16 by bolts, and the direction-changing roller 2 is disposed inside the rack body 16 by disposing the driving roller 25 to the outside of the rack body 16, so that the overall layout of the driving roller rack 1 is more reasonable.

In a preferred embodiment, each of the transmission roller bases 17 is obliquely provided in the rack body 16, and the direction of inclination of each of the transmission roller bases 17 is parallel to the direction of the resultant force of the belt 3 on which the direction-changing roller 2 is wound. Through setting up every transmission roller seat 17 slope in frame body 16, and the incline direction of every transmission roller seat 17 is parallel rather than the resultant force direction of winding belt 3 on it, can make the fixing device on the transmission roller seat 17, like the bolt, only receive single shearing force, and can not receive the pull-up force for transmission roller seat 17's atress is more reasonable, has increased the life of bolt, and safety and stability. As an alternative embodiment, the transmission roller base 17 may be provided in the rack body 16 in a non-inclined manner.

The upper end of the frame body 16 of the driving roller frame 1 is also fixedly connected with two clamping devices 18, the clamping devices 18 are suitable for clamping two sides of the belt 3, the belt 3 is prevented from shaking caused by wind blowing or other reasons, and stable transmission of the belt 3 is ensured. The integral structure is more compact by integrating the entrainment device 18 on the driving roller frame 1. As an alternative embodiment, the entrainment device 18 may not be provided on the rack body 16, but the entrainment device 18 may be provided separately on another component. As an alternative embodiment, more entrainment devices 18 may be provided on the rack body 16.

As shown in fig. 1, since the tensioning frame 4 is low in height and the tower 7 is high in height, in order to facilitate winding the wire rope 22, a first direction changing seat 23 is further provided between the tensioning frame 4 and the tower 7, a pulley is provided on the first direction changing seat 23, and the wire rope 22 is wound on the pulley to change the horizontal direction of the wire rope 22 into the vertical direction.

The tensioning device further comprises: the pulley block is arranged on the tower frame 7 and connected with the heavy hammer box 8, and a steel wire rope 22 is wound on the pulley block. Specifically, the pulley block includes: the three fixed pulleys 19 are fixedly arranged at the upper end of the tower 7, and a steel wire rope 22 is wound on the fixed pulleys; two movable pulleys 20, on which a wire rope 22 is wound, are connected to the weight box 8. Through set up the assembly pulley on pylon 7, the assembly pulley includes three fixed pulley 19 and two movable pulley 20, and 5 pulleys have constituted the assembly pulley of one set of two multiplying powers promptly for the taut stroke of weight case 8 can reduce half, and corresponding weight of weight case 8 increases one time, has shortened taut stroke and pylon 7's height greatly, makes overall structure compacter, has reduced economic cost simultaneously greatly. As an alternative embodiment, the pulley block can also be a single-ratio pulley block or a multiple-ratio pulley block.

Traditional overspeed device tensioner among the prior art, pylon are higher relatively, in case the weight case need overhaul or increase and decrease the weight piece when, need temporarily use large-scale crane equipment just can realize, operate difficulty, unsafe, in order to solve this problem, overspeed device tensioner in this embodiment still includes: the electric reel 21 is arranged on one side of the tower 7 far away from the tensioning trolley 5, a disc brake is connected to the electric reel 21 in a matching mode, and the electric reel 21 is connected with the pulley block through a steel wire rope 22. Through the electric reel 21 that sets up the dish formula stopper for electric reel 21 can automatic adjustment weight case 8 the position, control tension and taut stroke, and during the maintenance, because electric reel 21 deposit has wire rope, can place weight case 8 subaerial very conveniently, easy and simple to handle, and is safe controllable. As an alternative embodiment, the free end of the wire rope 22 of the pulley block may be fixed to the tower 7 without providing the power reel 21.

Because the height of the electric reel 21 is low, the height of the tower 7 is high, a second direction changing seat 24 is further arranged between the tower 7 and the electric reel 21, a pulley is also arranged on the second direction changing seat 24, and the steel wire rope 22 is wound on the pulley to change the vertical direction of the steel wire rope 22 into the horizontal direction.

The specific structure of the tensioning trolley 5 is the prior art, and not described herein too much, the tensioning trolley 5 is provided with wheels, and the bottom of the tensioning frame 4 is provided with a guide rail for moving the wheels.

The embodiment also provides a device with a tensioning device, which comprises a belt conveyor and the tensioning device connected with the belt 3 on the belt conveyor.

One end of a belt 3 is arranged on a belt conveyor, the position of the belt conveyor is higher, the height of a tensioning trolley 5 is lower, the belt 3 on the belt conveyor is conveyed downwards by a belt tower, the belt 3 is clamped by an entrainment device 18 on a driving roller frame 1 to ensure the stability of the transmission of the belt 3, then two sides of the belt 3 are respectively wound by two bend rollers 2 on the driving roller frame 1 to change the direction of the belt 3 from the vertical direction to the horizontal direction, wherein a driving roller 25 on the driving roller frame 1 provides driving force for the transmission of the whole belt 3, the belt 3 in the horizontal direction is supported by a carrier roller 11 on a dragging device 9, the other end of the belt 3 is wound on a tensioning roller 6 on the tensioning trolley 5, the other end of the tensioning trolley 5 is changed into the vertical direction from the horizontal direction by a steel wire rope 22 passing through a pulley of a first bend seat 23, after the steel wire rope 22 in the vertical direction is wound around the fixed pulley 19 and the movable pulley 20 on the tower 7, the steel wire rope 22 is wound around the pulley on the second direction-changing seat 24, the steel wire rope 22 is changed from the vertical direction to the horizontal direction, then the steel wire rope is wound on the electric reel 21, and the movable pulley 20 of the tower 7 is connected with the weight box 8.

Through set up towing gear 9 on taut frame 4, can support the belt 3 between driving roller frame 1 and taut dolly 5, prevent that taut dolly 5 from slipping when the long distance relatively driving roller frame 1, the flagging influence normal use of belt 3. And because set up a plurality of towing device 9, lead chain 12 and connect through the tow between towing device 9 and the tensioning dolly 5, even under long distance, the heavy traffic occasion, can drive towing device 9 through tow chain 12 in proper order and slide when tensioning dolly 5 slides, also can guarantee the long distance and to the bearing of belt 3.

Furthermore, five pulleys on the tower 7 form a set of double-rate pulley block, so that the tensioning stroke of the heavy hammer box 8 is shortened by a half, the weight of the heavy hammer box 8 is correspondingly doubled, and the tensioning stroke and the height of the tower 7 are greatly shortened; the weight box 8 on the tower 7 and the electric reel 21 are jointly controlled, so that the length of the tensioning frame 4 can be saved; the dynamic balance is achieved through the gravity of the heavy hammer box 8 and the tension force of the belt conveyor, the final tension stroke transmitted to the heavy hammer box 8 by the whole system is half of the actual tension stroke, and the height of the tower 7 is correspondingly reduced. Meanwhile, the electric reel 21 can adjust the position of the heavy hammer box 8, tension and tensioning travel are controlled, when maintenance is needed, the electric reel 21 can safely place the heavy hammer box 8 on the ground, and the electric heavy hammer box tensioning device is simple and convenient to operate, safe and reliable.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (14)

1. A tensioning device, comprising:

the driving roller frame (1) is provided with at least two direction-changing rollers (2), and the at least two direction-changing rollers (2) are suitable for being respectively wound on two sides of the conveying belt;

the tensioning frame (4) is arranged on one side of the driving roller frame (1);

the tensioning trolley (5) is arranged on the tensioning frame (4), a tensioning roller (6) is arranged on the tensioning trolley (5), and the tensioning roller (6) is suitable for winding one end of the conveying belt;

the tower frame (7) is arranged on one side of the tensioning frame (4), a heavy hammer box (8) is arranged on the tower frame (7), and the heavy hammer box (8) is connected with the tensioning trolley (5) through a tensioning rope and is used for driving the tensioning trolley (5) to slide relative to the tensioning frame (4);

and the at least one dragging device (9) is arranged on the tensioning frame (4), is positioned between the driving roller frame (1) and the tensioning trolley (5), and is suitable for bearing the conveying belt.

2. Tensioning device according to claim 1, characterized in that the towing device (9) comprises:

a tow body (10);

the conveying belt comprises at least two carrier rollers (11) which are arranged on the towing body (10) at intervals, and the upper ends of the carrier rollers (11) are suitable for bearing two sides of the conveying belt respectively.

3. Tensioning device according to claim 2, characterized in that the towing device (9) further comprises:

the towing guide chain (12) is connected to the towing body (10), one end of the towing guide chain (12) is fixed to the tensioning frame (4), and the other end of the towing guide chain is fixed to the tensioning trolley (5).

4. Tensioning device according to claim 3, characterized in that the towing device (9) further comprises:

the moving piece is arranged on the towing body (10) and is suitable for driving the towing body (10) to slide relative to the tensioning frame (4) when the tensioning trolley (5) slides relative to the tensioning frame (4).

5. The tensioning device as claimed in claim 4, further comprising:

and the towing guide rail (14) is fixedly connected to the tensioning frame (4) and is provided with the moving piece.

6. The tensioning device according to claim 5, characterized in that the tow guide rail (14) is arranged close to the position of the centre of gravity of the tow body (10).

7. The tensioning device as claimed in claim 3, characterized in that a plurality of suspension rings (15) are arranged on the tensioning frame (4) at intervals, and the towing guide chain (12) is arranged in the suspension rings (15) in a penetrating manner.

8. A tensioning device according to any one of claims 1 to 7, characterized in that the drive roller frame (1) comprises:

a holder body (16);

the rack comprises at least two transmission roller seats (17) arranged in the rack body (16), and each transmission roller seat (17) is fixedly provided with one turnabout roller (2).

9. The tensioning device according to claim 8, characterized in that each of the transmission roller bases (17) is obliquely arranged in the frame body (16), and the inclination direction of each of the transmission roller bases (17) is parallel to the resultant force direction of the conveyor belt on which the direction-changing rollers (2) are wound.

10. Tensioning device according to claim 8, characterized in that at least two entrainment devices (18) are fixedly connected to the upper end of the frame body (16), the entrainment devices (18) being adapted to grip both sides of the conveyor belt.

11. The tensioning device according to any one of claims 1 to 7, further comprising:

the pulley block is arranged on the tower (7) and connected with the heavy hammer box (8), and the tensioning rope is wound on the pulley block.

12. The tensioning device according to claim 11, characterized in that said set of pulleys comprises:

the three fixed pulleys (19) are fixedly arranged at the upper end of the tower (7), and the tensioning rope is wound on the fixed pulleys;

and the two movable pulleys (20) are wound with the tensioning ropes and are connected with the heavy hammer box (8).

13. The tensioning device as defined in claim 11, further comprising:

the electric reel (21) is arranged on one side of the tower (7), a disc brake is connected to the electric reel (21) in a matched mode, and the electric reel (21) is connected with the pulley block through the tensioning rope.

14. An apparatus having a tensioning device, characterized in that it comprises a belt conveyor and a tensioning device as claimed in any one of claims 1 to 13 connected thereto.

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