Torque-limiting type tensioning equipment for inverted conveyor

Abstract

The invention relates to the technical field of conveyor tensioning devices, in particular to torque-limiting type reverse tensioning equipment which comprises a tensioning device, the tensioning device comprises a sliding rail, a tensioning vehicle in sliding connection with the sliding rail, a winch and a steel wire rope connected with the tensioning vehicle and the winch, and the tensioning vehicle is rotationally connected with a conveying belt; the locking device comprises a fixing frame, a torque limiting barrel arranged on the fixing frame and a backstop arranged on the inner wall of the torque limiting barrel, the fixing frame is located between the tensioning vehicle and the winch, and the steel wire rope is wound around the outer wall of the torque limiting barrel. The device has the beneficial effects that the instant impact force borne by equipment in the locking process is reduced, then the impact force borne by civil engineering is reduced, the type selection range of the conveying belt is expanded, and then the civil engineering cost is reduced.

Description

Technical Field

[0001] This application relates to the technical field of conveyor tensioning devices, and particularly to a torque-limiting reverse tensioning device. Background Art

[0002] The belt conveyor is an important bulk material conveying equipment with a development history of more than one hundred years. Nowadays, with the continuous increase of industrial production capacity requirements, long-distance, large-capacity, and high-strength belt conveyors are more in line with production needs. Long-distance conveyors often have complex operating conditions. Along with the terrain undulation and horizontal turning layout, they often require greater tension force in emergency braking conditions to make the conveyor stop smoothly and avoid phenomena such as belt surge, belt overlapping, and belt slipping.

[0003] Currently, conveyor tensioning devices often include a tension brake and a tensioning mechanism. The tensioning mechanism usually adopts a tension winch or a weight tensioning mechanism. The tension winch includes a tensioning vehicle, a winch, and a steel wire rope wound around the winch. The end of the steel wire rope is fixed to the side wall of the tensioning vehicle through a clamp, the conveyor belt is wound around the tensioning vehicle, and the tension brake is clamped to the side wall of the steel wire rope; when the belt conveyor encounters an emergency condition, the staff starts the tension brake, and at this time, the tension brake directly locks the tensioning mechanism, thereby achieving the purpose of increasing the tension force in a short time.

[0004] The above locking process has a large instantaneous impact force on the equipment, which in turn increases the impact force on the civil engineering, resulting in an increase in the selection and operating power of the conveyor belt, and further increasing the cost of the civil engineering, so there is room for improvement. Summary of the Invention

[0005] In order to reduce the instantaneous impact force on the equipment during the locking process, thereby reducing the impact force on the civil engineering, expanding the selection range of the conveyor belt, and further reducing the cost of the civil engineering, this application provides a torque-limiting reverse tensioning device.

[0006] A torque-limiting reverse tensioning device provided by this application adopts the following technical solution: A torque-limiting reverse tensioning device includes: A tensioning device, including a slide rail, a tensioning vehicle slidably connected to the slide rail, a winch, and a steel wire rope connecting the tensioning vehicle and the winch. The tensioning vehicle is rotatably connected to the conveyor belt; A locking device, including a fixed frame, a torque-limiting cylinder provided on the fixed frame, and a reverse stop provided on the inner wall of the torque-limiting cylinder. The fixed frame is located between the tensioning vehicle and the winch, and the steel wire rope is wound around the outer wall of the torque-limiting cylinder.

[0007] By adopting the above technical solution, when the staff uses the tensioning equipment for work, the staff starts the winch. The winch tightens the steel wire rope to drive the tensioning vehicle to slide towards the fixed frame, thereby tightening the conveyor belt at the other end of the tensioning vehicle and realizing the tensioning function of the conveyor belt. When the conveyor is powered off or in an emergency braking condition, the inertia and internal elasticity of the conveyor belt form a relatively large reverse pulling force on the tensioning system in a short time. Driven by the reverse pulling force, the tensioning vehicle shows a tendency to slide away from the fixed frame. At this time, the torque-limiting cylinder and the backstop provide a reverse force for the steel wire rope, thereby reducing the sliding tendency of the tensioning vehicle. This setting reduces the instantaneous impact force on the equipment during the locking process, and further reduces the impact force on the civil engineering, thereby expanding the selection range of the conveyor belt and reducing the cost of the civil engineering.

[0008] Optionally, the tensioning device further includes a weight mechanism. The weight mechanism is located between the fixed frame and the winch. The weight mechanism is connected to the winch through the steel wire rope, and the winch is used to drive the weight mechanism to slide.

[0009] By adopting the above technical solution, the weight mechanism provides a stable pulling force for the steel wire rope through the action of gravity, thereby keeping the tension of the conveyor belt constant. And the setting of the weight mechanism enables the weight mechanism to provide a reverse force under emergency conditions when the winch or the torque-limiting cylinder fails, thereby reducing the impact on the civil engineering.

[0010] Optionally, the weight mechanism includes a weight frame, a terminal weight slidably connected to the inner wall of the weight frame, a fixed pulley set fixed at one end of the weight frame away from the ground, a movable pulley set fixed at one end of the terminal weight away from the ground, and turning pulleys respectively arranged on both sides of the weight frame. One of the turning pulleys is connected to the winch through a steel wire rope, and the other turning pulley is connected to the torque-limiting cylinder through a steel wire rope. The fixed pulley set, the movable pulley set, and the turning pulleys are all connected through the steel wire rope.

[0011] By adopting the above technical solution, when the staff installs the weight mechanism, the staff installs the weight frame into the working environment. The weight frame is located between the fixed frame and the winch. The steel wire rope on the winch is connected to the fixed pulley set and the movable pulley set through the turning pulley, and then the steel wire rope is connected to the torque-limiting cylinder through the turning pulley on the other side of the weight frame. When the conveyor belt tension exceeds the torque limit value of the torque-limiting cylinder after an emergency condition occurs, the terminal weight drives the movable pulley set to slide on the inner wall of the weight frame, thereby achieving the purpose of increasing the tensioning force and further reducing the impact of the additional force on the civil engineering foundation.

[0012] Optionally, the tensioning device further includes a fixing plate located between the tensioning vehicle and the fixing frame. A connecting pulley is installed on one side of the tensioning vehicle close to the fixing plate, and the steel wire rope is fixed to the side wall of the fixing plate through the connecting pulley.

[0013] By adopting the above technical solution, the arrangement of the fixing plate and the connecting pulley makes the tension distribution of the steel wire rope more uniform, reduces the force required for tensioning the conveyor belt, reduces the problem of conveyor belt slipping caused by uneven tension, and improves the operating efficiency and stability of the conveyor belt.

[0014] Optionally, a plurality of wire grooves are formed on the outer wall of the torque-limiting cylinder, and the steel wire rope abuts against the inner wall of the wire groove.

[0015] By adopting the above technical solution, the arrangement of the wire grooves provides a fixed path for the steel wire rope, making the line management more standardized. This arrangement avoids the crossing of the steel wire ropes and reduces the possibility of chaos and mutual interference in the steel wire rope lines.

[0016] Optionally, linear modules are arranged on both sides of the weight frame. The linear modules are arranged in the direction perpendicular to the ground. The steering pulley is rotatably connected to the slide of the linear module, and the steel wire rope is parallel to the linear module and rotatably connected to the steering pulley.

[0017] By adopting the above technical solution, when the working plane is uneven, the staff can control the height of the steering pulley on the side wall of the weight frame through the linear module, so as to realize the horizontal connection of the steel wire rope, and further make the tension distribution of the steel wire rope uniform, reducing the possibility of the steel wire rope breaking due to uneven tension.

[0018] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the staff uses the tensioning equipment, the staff winds the conveyor belt to the side of the tensioning vehicle away from the fixing frame. Under the tensioning action of the winch, the tensioning vehicle slides towards the direction close to the fixing frame, so that the conveyor belt works normally. When an emergency condition occurs, the staff starts the locking device. Under the limiting action of the torque-limiting cylinder, the tendency of the tensioning vehicle to slide away from the fixing frame is reduced. This setting reduces the instantaneous impact force received by the equipment during the locking process, and further reduces the impact force received by the civil engineering, thereby expanding the selection range of the conveyor belt and reducing the cost of the civil engineering.

[0019] 2. When installing the torque-limiting reverse tensioning device, the staff can change the relative position of the steering pulley on the side wall of the weight frame through the linear module, so as to align the lower side of the steering pulley with the lower side of the torque-limiting cylinder or the lower side of the winch drum, that is, to make the steel wire rope parallel to the ground. This setting reduces the possibility of excessive deflection angle of the steel wire rope, makes the tension distribution of the steel wire rope more uniform, and increases the service life of the steel wire rope. Brief Description of the Drawings

[0020] Figure 1 is the overall structural schematic diagram of a torque-limiting reverse tensioning device in Embodiment 1 of the present application.

[0021] Figure 2 is the overall structural schematic diagram of the locking device in Embodiment 1 of the present application.

[0022] Figure 3 is the overall structural schematic diagram of the tensioning vehicle in Embodiment 1 of the present application.

[0023] Figure 4 is the overall structural schematic diagram of the weight mechanism in Embodiment 1 of the present application.

[0024] Figure 5 is the overall structural schematic diagram of a torque-limiting reverse tensioning device in Embodiment 2 of the present application.

[0025] Figure 6 is the Figure 5 enlarged view of part A in this

[0026] Reference Signs: 1, tensioning device; 11, slide rail; 12, tensioning vehicle; 13, winch; 14, steel wire rope; 2, locking device; 21, fixing frame; 22, torque-limiting cylinder; 23, backstop; 15, weight mechanism; 151, weight frame; 152, end weight; 153, fixed pulley group; 154, movable pulley group; 155, steering pulley; 16, fixing plate; 3, wire groove; 4, linear module. Detailed Description of the Embodiments

[0027] The following Figures 1-6 further describes the present application in detail with reference to the attached

[0028] Embodiment 1 of the present application discloses a torque-limiting reverse tensioning device.

[0029] Embodiment 1 Refer to Figure 1 and Figure 2, A torque-limiting reverse-tensioning device, including a pulling-in device and a locking device 2. Among them, the tensioning device 1 includes a slide rail 11, a tensioning cart 12 slidably connected to the slide rail 11, a winch 13 for pulling the tensioning cart 12, and a steel wire rope 14 connecting the tensioning cart 12 and the winch 13. In the embodiment of the present application, preferably two steel wire ropes 14 are provided. One end of one steel wire rope 14 is fixed to the edge position of the drum of the winch 13, and the end of the other steel wire rope 14 is fixed to the shaft position of the drum of the winch 13; the locking device 2 includes a fixing frame 21, a torque-limiting cylinder 22 installed on the fixing frame 21, and a backstop 23 provided on the inner wall of the torque-limiting cylinder 22. A wire groove 3 is provided on the outer side of the torque-limiting cylinder 22, and the inner wall of the wire groove 3 abuts against the outer wall of the steel wire rope 14. The fixing frame 21 is installed at the position between the winch 13 and the tensioning cart 12 in the working site. In the embodiment of the present application, preferably two backstops 23 are provided. Both backstops 23 are arranged parallel to the ground and are arranged along the forward rotation direction of the torque-limiting cylinder 22. The forward rotation direction of the torque-limiting cylinder 22 is the converging direction in which the steel wire rope 14 drives the tensioning cart 12 to slide towards the fixing frame 21.

[0030] When the staff uses the tensioning device, the staff winds the conveyor belt around the tensioning cart 12, and then the staff fixes the steel wire rope 14 to the side of the tensioning cart 12 close to the fixing frame 21 after passing through the winch 13 and the torque-limiting cylinder 22. When the staff performs an emergency brake on the conveyor belt under special working conditions, the conveyor belt generates a large reverse pulling force. Under the combined action of the torque-limiting cylinder 22 and the backstop 23, both the tendency of the tensioning cart 12 to move away from the fixing plate 16 and the tendency of the end weight 152 to hit the top are reduced.

[0031] Refer to Figure 1 and Figure 3 , The tensioning device 1 further includes a fixing plate 16. The fixing plate 16 is fixed to the working site by bolts. The fixing plate 16 is located at the position between the tensioning cart 12 and the fixing frame 21. The fixing plate 16 is arranged as an inclined triangular frame. A first roller is installed on the side of the tensioning cart 12 close to the fixing plate 16. A second roller is rotatably connected to the side of the fixing plate 16 close to the fixing frame 21. The second roller and the first roller are arranged in parallel. The steel wire rope 14 passes around the second roller and then around the first roller and is fixed to the side of the fixing plate 16 close to the tensioning cart 12. This setting enables the tensioning cart 12 to slide stably on the slide rail 11, increasing the stability of the tensioning device during operation.

[0032] Refer to Figure 1 and Figure 4, the tensioning device 1 further includes a weight mechanism 15. The weight mechanism 15 is located between the fixed frame 21 and the winch 13. The weight mechanism 15 includes a weight frame 151, a terminal weight 152 slidably connected to the inner wall of the weight frame 151, a fixed pulley set 153 bolted to the end of the weight frame 151 away from the ground, a movable pulley set 154 bolted to the upper side of the terminal weight 152, and steering pulleys 155 installed on both sides of the weight frame 151. Among them, the fixed pulley set 153 preferably has three fixed pulleys, the movable pulley set 154 preferably has two movable pulleys, and the fixed pulleys and movable pulleys are arranged at equal intervals. The two steering pulleys 155 are respectively a first steering pulley 155 bolted to one side of the weight frame 151 close to the fixed frame 21 and a second steering pulley 155 bolted to one side of the weight frame 151 close to the winch 13. A heightening block is bolted to the lower sides of the first steering pulley 155 and the second steering pulley 155. The heightening block is used to change the heights of the first steering pulley 155 and the second steering pulley 155, so as to achieve the height alignment of the first steering pulley 155 with the torque-limiting cylinder 22 and the second steering pulley 155 with the drum of the winch 13. The steel wire rope 14 is connected to the torque-limiting cylinder 22 after passing around the second steering pulley 155, the fixed pulley, the movable pulley, and the first steering pulley 155 through the winch 13.

[0033] In the first embodiment of the present application, the implementation principle of a torque-limiting reverse tensioning device is as follows: When the staff uses the tensioning device to tension the conveyor belt, the staff installs the conveyor belt on the side of the tensioning vehicle 12 away from the fixed plate 16. Subsequently, the staff starts the winch 13, and the winch 13 provides a pulling force for the tensioning vehicle 12 through the steel wire rope 14, so that the tensioning vehicle 12 provides a tensioning force for the conveyor belt. When an emergency braking condition occurs, the inertia and internal elasticity of the conveyor belt form a short-term large reverse pulling force on the tensioning system. At this time, under the combined action of the torque-limiting cylinder 22 and the reverse brake 23, the tendency of the tensioning vehicle 12 to move away from the fixed plate 16 and the tendency of the terminal weight 152 to top are both reduced. When the tension of the conveyor belt exceeds the torque limit value of the torque-limiting cylinder 22, the terminal weight 152 further provides a pulling force for the tensioning vehicle 12. This setting reduces the instantaneous impact force received by the equipment during the locking process, thereby reducing the impact force received by the civil engineering, expanding the selection range of the conveyor belt, and reducing the cost of the civil engineering.

[0034] Embodiment Two Embodiment Two is different from Embodiment One in that: Refer to Figure 5 and Figure 6, a number of linear modules 4 are respectively arranged on both sides of the weight hammer frame 151. In the embodiment of the present application, preferably four linear modules 4 are provided. Two linear modules 4 are taken as a group and are respectively fixed to one side of the weight hammer frame 151 close to the fixed plate 16 and one side of the weight hammer frame 151 close to the winch 13 by bolts. The adjacent two linear modules 4 are arranged in parallel, and the sliders of the adjacent two linear modules 4 are respectively rotatably connected to the steering pulley 155.

[0035] In the second embodiment of the present application, the implementation principle of a torque-limiting reverse-mounted tensioning device is as follows: when the staff installs the tensioning device, the staff adjusts the height of the steering pulley 155 on the side wall of the weight hammer box through the linear module 4 according to the heights of the winch 13 and the torque-limiting cylinder 22. This setting makes the tension distribution of the steel wire rope 14 more uniform and increases the service life of the steel wire rope 14.

[0036] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A torque-limited reverse tensioning device, characterized in that: include: A tensioning device (1) comprises a slide rail (11), a tensioning vehicle (12) slidably connected to the slide rail (11), a winch (13), and a steel wire rope (14) connecting the tensioning vehicle (12) and the winch (13), wherein the tensioning vehicle (12) is rotatably connected to a conveyor belt; The locking device (2) comprises a fixing frame (21), a torque limiting cylinder (22) arranged on the fixing frame (21), and a check valve (23) arranged on the inner wall of the torque limiting cylinder (22); the fixing frame (21) is located between the tensioning vehicle (12) and the winch (13); and the steel wire rope (14) is wound around the outer wall of the torque limiting cylinder (22).

2. A torque-limited reverse tensioning device according to claim 1, characterized in that: The tensioning device (1) further comprises a weight mechanism (15), wherein the weight mechanism (15) is located between the fixing frame (21) and the winch (13), the weight mechanism (15) is connected to the winch (13) via the steel wire rope (14), and the winch (13) is used to drive the weight mechanism (15) to slide.

3. A torque-limited reverse tensioning device according to claim 2, characterized in that: The weight mechanism (15) comprises a weight frame (151), a terminal weight (152) slidably connected to the inner wall of the weight frame (151), a fixed pulley block (153) fixed to the end of the weight frame (151) away from the ground, a movable pulley block (154) fixed to the end of the terminal weight (152) away from the ground, and deflection pulleys (155) respectively arranged on both sides of the weight frame (151), one of the deflection pulleys (155) is connected to the winch (13) through a steel wire rope (14), and the other deflection pulley (155) is connected to the torque limiting cylinder (22) through a steel wire rope (14), and the fixed pulley block (153), the movable pulley block (154) and the deflection pulley (155) are all connected through the steel wire rope (14).

4. A torque-limited reverse tensioning device according to claim 3, characterized in that: The tensioning device (1) also includes a fixing plate (16), wherein the fixing plate (16) is located between the tensioning vehicle (12) and the fixing frame (21), and a connecting pulley is installed on a side of the tensioning vehicle close to the fixing plate (16), and the steel wire rope (14) is fixed to the side wall of the fixing plate (16) via the connecting pulley.

5. A torque-limited reverse tensioning device according to claim 4, characterized in that: The outer wall of the moment limiting cylinder (22) is provided with a plurality of wire grooves (3), and the steel wire rope (14) abuts against the inner wall of the wire grooves (3).

6. A torque-limited reverse tensioning device according to claim 5, characterized in that: A linear module (4) is provided on both sides of the weight frame (151), the linear module (4) is arranged in a direction perpendicular to the ground, the steering pulley (155) is rotatably connected to the slide table of the linear module (4), and the steel wire rope (14) is parallel to the linear module (4) and rotatably connected to the steering pulley (155).

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