Tensioning device for steel wire rope of telescopic movable conveyor

Abstract

The utility model relates to the technical field of conveyors, in particular to a steel wire rope tensioning device in a telescopic system of a telescopic movable conveyor, which comprises a movable truss, a fixed truss, a movable frame, a fixed frame, a pressing rod, a spring, a screw rod, a locking nut, a guide shaft, a guide rail, a limit switch, a fixing nut, a cylindrical pin and a safety baffle, a telescopic system is mounted between the movable truss and the fixed truss and comprises a hoisting mechanism, a steel wire rope I, a steel wire rope II, a pulley I, a pulley II, a pulley III, a guide wheel and a steel wire rope tensioning device; two steel wire ropes can be tensioned at the same time, the two steel wire ropes can keep pretightening force needed by the sagging degree requirement of the steel wire ropes within the adjusting range of the spring through the action of the spring, and automatic looseness prevention is achieved; the spring can push the pressing rod to trigger the limiting switch to feed back signals to the control system and prompt maintenance, and the operation stability of the telescopic system is improved.

Description

Technical Field

[0001] The invention relates to the technical field of conveyors, in particular to a steel wire rope tensioning device in a telescopic system of a telescopic mobile conveyor. Background Art

[0002] In recent years, telescopic mobile conveyors have developed rapidly. There is no perfect industry standard for such equipment in China. Such equipment is mainly used for bulk material stacking and distribution in docks, mines, material yards, etc. The characteristics of telescopic mobile conveyors are that the material throwing point can be adjusted from near to far and from low to high. With the walking of the vehicle, a larger distribution range can be achieved. It is flexible to use and has strong adaptability.

[0003] The telescopic function of the mobile truss of the telescopic mobile conveyor is one of the main functions of this type of equipment, and plays a key role in the normal operation of the equipment. The telescopic function is mainly achieved through the telescopic system, which includes: winch mechanism, wire rope I, wire rope II, pulley I, pulley II, pulley III, guide wheel and wire rope tensioning device. The telescopic system is installed between the mobile truss and the fixed truss, and the wire rope tensioning device plays a vital role in the stable operation of the telescopic system; when there is an installation deviation between the wire rope I and the wire rope II, or elastic elongation occurs during use, or one of the wire ropes is tightened and the other is too loose, there will be a displacement difference between the wire rope I and the wire rope II. When the telescopic system is telescopically converted, the mobile truss is prone to slipping and impacting the telescopic system. In severe cases, it will cause fatigue damage to the wire rope I and the wire rope II, causing safety accidents.

[0004] In addition, when the wire ropes I and II are too loose, the droop of the wire ropes will be relatively large. In serious cases, it will exceed the maximum height allowed between adjacent guide wheels, causing the wire ropes to rub against the rods at the bottom of the fixed truss, posing a safety risk. At the same time, when the wire ropes I and II are too loose, there is also a risk that the wire ropes will slip off the pulley. Therefore, it is very important to ensure that the wire ropes I and II always maintain a certain preload for the stable operation of the telescopic system. Summary of the invention

[0005] In order to overcome the impact of the mobile truss on the telescopic system caused by the relaxation of the wire rope, the risk of the wire rope scratching the bottom rod of the fixed truss and the wire rope slipping off the pulley. The present invention provides a telescopic mobile conveyor wire rope tensioning device, which can simultaneously tension two wire ropes; through the action of the spring, the two wire ropes can maintain the preload required to meet the sag requirement of the wire rope within the adjustment range of the spring, thereby achieving automatic anti-loosening; when the relaxation of the wire rope exceeds the adjustment range of the spring, the spring will push the pressure rod to trigger the limit switch to feedback the control system and prompt maintenance. At this time, by checking the connection and wear of the wire rope, after confirming that the requirements are met, the stroke of the screw can be readjusted to restore the required preload of the wire rope. The structural diagram of the telescopic mobile conveyor wire rope tensioning device of the present invention is shown in Figure 5 .

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] The telescopic mobile conveyor wire rope tensioning device can simultaneously tension two wire ropes, including: a mobile truss, a fixed truss, a movable frame, a fixed frame, a pressure rod, a spring, a screw, a locking nut, a guide shaft, a guide rail, a limit switch, a fixed nut, a cylindrical pin and a safety baffle. A telescopic system is installed between the mobile truss and the fixed truss. The telescopic system includes: a hoisting mechanism, a wire rope I, a wire rope II, a pulley I, a pulley II, a pulley III, a guide wheel and a wire rope tensioning device. The pulley I is installed on the movable frame, and the wire rope I is wound around the pulley I. The movable frame is installed with a guide rail, and the guide rail is welded to the mobile truss. The movable frame can slide in the direction of the guide rail;

[0008] The pulley II is installed on the fixed frame, the steel wire rope II is wound around the pulley II, the guide shaft is welded to the fixed frame, and the fixed frame is welded to the movable truss;

[0009] The right end of the screw is connected to the fixing nut and is fixed to prevent loosening by a cylindrical pin. The fixing nut is hinged to the movable frame. The left end of the screw passes through the fixing frame and the pressure rod and is connected to the pressure rod by a locking nut. The pressure rod compresses the spring sleeve on the guide shaft and is connected to the fixing frame.

[0010] Preferably, a limit switch is installed on the left side of the pressure rod in the extension direction of the spring on the movable truss; when the slack of the wire rope I or wire rope II exceeds the adjustment range of the spring, the spring will push the pressure rod to pop out to the left and trigger the limit switch to feedback a signal to the control system and prompt maintenance. At this time, by checking the connection and wear of the wire rope, and after confirming that the requirements are met, adjust the locking nut to readjust the stroke of the screw so that the wire rope can restore the required preload.

[0011] Preferably, the safety baffle is arranged at the lower part of the movable frame, and in the case of failure of the screw rod, the movable frame will be stuck in the frame of the bottom surface of the movable truss and will not be pulled out.

[0012] Preferably, the hoisting mechanism adopts a single drum and double rope output structure.

[0013] The beneficial effects of the present invention are:

[0014] (1) The present invention can tension two steel wire ropes at the same time. Through the action of the spring, the two steel wire ropes can maintain the preload force required to meet the sag requirement of the steel wire rope within the adjustment range of the spring, thereby realizing automatic anti-loosening. When the slack of the steel wire rope exceeds the adjustment range of the spring, the spring will push the pressure rod to trigger the limit switch to feedback a signal to the control system and prompt maintenance. At this time, by checking the connection and wear of the steel wire rope, after confirming that the requirements are met, the stroke of the screw rod can be readjusted to restore the required preload force of the steel wire rope.

[0015] (2) When the slack of the wire rope I or II exceeds the adjustment range of the spring, the spring will push the pressure rod to pop out to the left and trigger the limit switch to feedback a signal to the control system and prompt maintenance. At this time, by checking the connection and wear of the wire rope, after confirming that the requirements are met, adjust the locking nut to readjust the stroke of the screw so that the wire rope can restore the required preload. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is the layout diagram of the telescopic mobile conveyor at its farthest and highest extreme working state.

[0018] Figure 2 It is the layout diagram of the telescopic mobile conveyor's closest and lowest limit working state.

[0019] Figure 3 It is the layout diagram of the telescopic system when the mobile truss is in the maximum extension limit state.

[0020] Figure 4 It is the layout diagram of the telescopic system when the mobile truss is in the minimum contraction limit state.

[0021] Figure 5 It is a structural diagram of the telescopic mobile conveyor wire rope tensioning device of the present invention.

[0022] Figure 6 yes Figure 5 CC cross-sectional view.

[0023] Figure 7 yes Figure 5 DD cross-sectional view.

[0024] Figure 8 yes Figure 5 E-direction view.

[0025] Fig. 9 yes Figure 5 F direction view.

[0026] Fig.10 yes Figure 5 GG cross-sectional view.

[0027] Fig.11 It is a schematic diagram of the working limit of the telescopic mobile conveyor wire rope tensioning device of the present invention.

[0028] In the figure: 1. Mobile truss; 2. Fixed truss; 3. Telescopic system; 4. Get off; 5. Winch mechanism; 6. Wire rope I; 7. Wire rope II; 8. Pulley I; 9. Pulley II; 10. Pulley III; 11. Guide wheel; 12. Wire rope tensioning device; 13. Movable frame; 14. Fixed frame; 15. Pressure rod; 16. Spring; 17. Screw; 18. Locking nut; 19. Guide shaft; 20. Guide rail; 21. Limit switch; 22. Fixing nut; 23. Cylindrical pin; 24. Safety baffle. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Example:

[0033] See also Figures 1 to 11 The present invention provides a telescopic mobile conveyor wire rope tensioning device, which can simultaneously tension two wire ropes, including: a mobile truss 1, a fixed truss 2, a movable frame 13, a fixed frame 14, a pressure rod 15, a spring 16, a screw 17, a locking nut 18, a guide shaft 19, a guide rail 20, a limit switch 21, a fixed nut 22, a cylindrical pin 23 and a safety baffle 24, a telescopic system 3 is installed between the mobile truss 1 and the fixed truss 2, and the telescopic system 3 includes: a hoisting mechanism 5, a wire rope I6, a wire rope II7, a pulley I8, a pulley II9, a pulley III10, a guide wheel 11 and a wire rope tensioning device 12, the pulley I8 is installed on the movable frame 13, the wire rope I6 is wound around the pulley I8, the movable frame 13 is installed with a guide rail 20, the guide rail 20 is welded to the mobile truss 1, and the movable frame 13 can slide in the direction of the guide rail 20;

[0034] The pulley II 9 is installed on the fixed frame 14, the steel wire rope II 7 is wound around the pulley II 9, the guide shaft 19 is welded to the fixed frame 14, and the fixed frame 14 is welded to the movable truss 1;

[0035] The right end of the screw rod 17 is connected to the fixing nut 22 and is fixed to prevent loosening by a cylindrical pin 23. The fixing nut 22 is hinged to the movable frame 13. The left end of the screw rod 17 passes through the fixed frame 14 and the pressure rod 15, and is connected to the pressure rod 15 by a locking nut 18. The pressure rod 15 compresses the spring 16 sleeved on the guide shaft 19 and connects it to the fixed frame 14.

[0036] in Figure 1 The throwing point is at the farthest and highest working state. Figure 2 The throwing point is in the closest and lowest working state.

[0037] exist Figure 3In the figure, the wire rope II7 is unwound from the bottom of the drum of the hoisting mechanism 5, and is successively wound around the pulley III10 and the pulley II9, and the end is wound back to the vicinity of the pulley III10 and fixed to the fixed truss 2. The wire rope I6 is unwound from the top of the drum of the hoisting mechanism 5, and is wound around the pulley I8, and the end is wound back to the fixed truss 2 near the hoisting mechanism 5 and fixed. A guide wheel 11 is installed at the bottom of the fixed truss 2 to prevent the wire ropes I6 and II7 from scratching against the bottom rods of the fixed truss 2 when the droop is too large. The pulley III10 is installed on the fixed truss 2, and the pulley II9 and the pulley I8 are installed on the wire rope tensioning device 12, and the wire rope tensioning device 12 is installed on the mobile truss 1.

[0038] The hoisting mechanism 5 adopts a single drum double-rope structure. When the wire rope Ⅰ6 is released, the wire rope Ⅱ7 is synchronously retracted. Conversely, when the wire rope Ⅱ7 is released, the wire rope Ⅰ6 is synchronously retracted. The wire rope Ⅰ6 is wound out from the hoisting mechanism 5, and is wound back to the fixed truss 2 near the hoisting mechanism 5 through the pulley Ⅰ8. The wire rope Ⅱ7 is wound out from the hoisting mechanism 5, and is wound around the pulley Ⅲ10 to the pulley Ⅱ9 and is wound back to the fixed truss 2 near the pulley Ⅲ10. The hoisting mechanism 5 and the pulley Ⅲ10 are installed on the fixed truss 2, and the pulley Ⅰ8 and the pulley Ⅱ9 are installed on the wire rope tensioning device 12, and the wire rope tensioning device 12 is installed on the mobile truss 1. When the wire rope Ⅰ6 is released and the wire rope Ⅱ7 is synchronously retracted, the mobile truss 1 can be extended outward relative to the fixed truss 2. When the steel wire rope II 7 is unwound and the steel wire rope I 6 is retracted simultaneously, the movable truss 1 can be retracted inwardly relative to the fixed truss 2 . Figure 1 is the maximum extension limit state of the mobile truss 1. Figure 2 In the embodiment, the steel wire rope II 7 is in the state of releasing the rope, the steel wire rope I 6 is in the state of collecting the rope, and the mobile truss 1 is in the state of maximum contraction.

[0039] exist Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10In the figure, pulley Ⅰ8 is installed on the movable frame 13, wire rope Ⅰ6 is wound around pulley Ⅰ8, ​​movable frame 13 is installed on guide rail 20, guide rail 20 is welded to movable truss 1, and movable frame 13 can slide along guide rail 20. Pulley Ⅱ9 is installed on fixed frame 14, wire rope Ⅱ7 is wound around pulley Ⅱ9, guide shaft 19 is welded to fixed frame 14, and fixed frame 14 is welded to movable truss 1. The right end of screw rod 17 is connected with fixing nut 22 and fixed to prevent loosening by cylindrical pin 23. Fixing nut 22 is hinged with movable frame 13 to ensure that screw rod 17 only bears axial tension and avoids end bending moment of screw rod 17 due to uneven force. The left end of screw rod 17 passes through fixed frame 14 and pressure rod 15 and is connected with pressure rod 15 through locking nut 18. Pressure rod 15 compresses spring 16 sleeved on guide shaft 19 and connects with fixed frame 14. A limit switch 21 is installed on the movable truss 1 on the left side of the pressure rod 15 along the extension direction of the spring 16 .

[0040] A safety baffle 24 is provided at the bottom of the movable frame 13. If the screw rod 17 fails, the movable frame 13 will be stuck in the frame of the bottom surface of the movable truss 1 and will not be pulled out, thereby avoiding safety accidents.

[0041] exist Fig.11 In the embodiment, when the wire rope I6 or the wire rope II7 is loose, the spring 16 will push the pressure rod 15 to pop out to the left, and drive the movable frame 13 to slide to the left along the guide rail 20 through the screw 17, thereby shortening the distance between the wire rope I6 and the wire rope II7 to realize the automatic loosening prevention of the wire rope I6 and the wire rope II7. When the wire rope I6 or the wire rope II7 is too loose and exceeds the adjustment range of the spring 16, the spring 16 will push the pressure rod 15 to pop out to the left and trigger the limit switch 21 to feedback the control system and prompt maintenance. At this time, by checking the connection and wear of the wire rope I6 and the wire rope II7, after confirming that the requirements are met, adjust the travel of the screw 17 by adjusting the locking nut 18 to restore the required preload of the wire rope I6 and the wire rope II7.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The telescopic mobile conveyor wire rope tensioning device can tension two wire ropes at the same time. include: A movable truss (1), a fixed truss (2), a movable frame (13), a fixed frame (14), a pressure rod (15), a spring (16), a screw (17), a locking nut (18), a guide shaft (19), a guide rail (20), a limit switch (21), a fixing nut (22), a cylindrical pin (23) and a safety baffle (24), characterized in that a telescopic system (3) is installed between the movable truss (1) and the fixed truss (2), and the telescopic system (3) includes: a hoisting mechanism ( 5), a steel wire rope I (6), a steel wire rope II (7), a pulley I (8), a pulley II (9), a pulley III (10), a guide wheel (11) and a steel wire rope tensioning device (12), wherein the pulley I (8) is installed on a movable frame (13), the steel wire rope I (6) is wound around the pulley I (8), a guide rail (20) is installed on the movable frame (13), the guide rail (20) is welded to the movable truss (1), and the movable frame (13) can slide along the direction of the guide rail (20); The pulley II (9) is installed on the fixed frame (14), the steel wire rope II (7) is wound around the pulley II (9), the guide shaft (19) is welded to the fixed frame (14), and the fixed frame (14) is welded to the movable truss (1); The right end of the screw rod (17) is connected to a fixing nut (22) and is fixed to prevent loosening by a cylindrical pin (23). The fixing nut (22) is hinged to the movable frame (13). The left end of the screw rod (17) passes through the fixed frame (14) and the pressure rod (15) and is connected to the pressure rod (15) by a locking nut (18). The pressure rod (15) compresses a spring (16) sleeved on a guide shaft (19) to connect with the fixed frame (14).

2. The telescopic mobile conveyor wire rope tensioning device according to claim 1, Features: A limit switch (21) is installed on the left side of the pressure rod (15) in the extension direction of the upward extension spring (16) of the movable truss (1); when the slack of the steel wire rope I (6) or the steel wire rope II (7) exceeds the adjustment range of the spring (16), the spring (16) will push the pressure rod (15) to pop out to the left and trigger the limit switch (21) to feedback a signal to the control system and prompt maintenance.

3. The telescopic mobile conveyor wire rope tensioning device according to claim 1, Features: The safety baffle (24) is arranged at the lower part of the movable frame (13). In the case of failure of the screw rod (17), the movable frame (13) will be stuck in the frame of the bottom surface of the movable truss (1) and will not be pulled off.

4. The telescopic mobile conveyor wire rope tensioning device according to claim 1, Features: The hoisting mechanism (5) adopts a single drum and double rope output structure.

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