CN109879192B

CN109879192B - Steel wire rope tensioning device of bulk machine

Info

Publication number: CN109879192B
Application number: CN201910224399.4A
Authority: CN
Inventors: 刘成华; 刘琦
Original assignee: Wuhan Yuge Power Equipment Co ltd
Current assignee: Wuhan Yuge Power Equipment Co ltd
Priority date: 2019-03-23
Filing date: 2019-03-23
Publication date: 2021-06-08
Anticipated expiration: 2039-03-23
Also published as: CN109879192A

Abstract

The invention discloses a tensioning device for a steel wire rope, which relates to the technical field of bulk machines and comprises a base, a driving motor, a speed reducer and three hollow stand columns, wherein the driving motor, the speed reducer and the three hollow stand columns are arranged on the base, the driving motor is fixedly arranged on the base and is connected with a central rotating shaft through the speed reducer, three winding grooved wheels are fixed on the central rotating shaft, each winding grooved wheel is fixedly connected with one steel wire rope, a hanging weight hammer is arranged in each hollow stand column, and the three steel wire ropes are fixedly connected with the bottom of a telescopic discharging pipe after respectively bypassing the three hanging weight hammers. The invention has the technical effects of keeping the steel wire rope in a proper tensioning state and avoiding the loosening, twisting and knotting of the steel wire rope or the over-tightening and even breaking of the steel wire rope.

Description

Steel wire rope tensioning device of bulk machine

Technical Field

The invention relates to the technical field of bulk machines, in particular to a steel wire rope tensioning device of a bulk machine.

Background

The bulk machine is a packaging device and is used for outputting materials in a storage warehouse to transport tools such as trucks, tank cars and ships. Common bulk machines include a clinker bulk machine, a bottom bulk machine, a side bulk machine, a dry ash (slag) bulk machine and the like, wherein the dry ash (slag) bulk machine is suitable for industries such as electric power, building materials, chemical engineering and the like. The bottom of the bulk machine is generally provided with a telescopic discharging pipe, the telescopic discharging pipe is generally formed by sleeving a plurality of sleeve type telescopic joints, a plurality of steel wire ropes are fixedly connected to one sleeve type telescopic joint at the bottommost part, and the telescopic discharging pipe is stretched through a steel wire rope winding and unwinding device. The traditional steel wire rope winding and unwinding device separately winds and unwinds a plurality of steel wire ropes, and the plurality of steel wire ropes are easily unsynchronized in winding and unwinding to cause unstable stretching direction of the telescopic blanking pipe, so that unsmooth blanking is easily caused, and mechanical damage to each telescopic joint is increased.

To the above-mentioned problem, patent publication No. is CN106966187A Chinese patent, has proposed a high-efficient dry ash machine in bulk, including a supporting bench, set up the hoisting device in supporting bench upper end one side, set up the fan at supporting bench upper end opposite side, set up scalable random packing mechanism and the controlling means of setting in the hoisting device top in the middle of the supporting bench, scalable random packing mechanism includes feeding mouth of pipe and flexible dust absorption pipe, the fan passes through the air-supply line and links to each other with the feeding mouth of pipe, the hoisting device passes through wire rope and links to each other with flexible dust absorption pipe, the lower extreme of flexible dust absorption pipe is provided with the head in bulk, be provided with pressure sensor in the flexible dust absorption pipe, the tip of head in bulk is provided with the.

The above prior art solutions have the following drawbacks: according to the scheme, the three steel wire ropes rotate through the motor to drive the winding drum to realize synchronous winding and unwinding, however, if a worker does not see the telescopic blanking pipe to be lowered to the lowest point or to be contracted to the highest point in time and does not turn off the motor in time, the steel wire ropes can be loosened, twisted, knotted or over-tightened or even broken, normal blanking is influenced if the situation is light, and safety accidents are caused if the situation is heavy.

Disclosure of Invention

The invention aims to provide a steel wire rope tensioning device which can keep a steel wire rope in a proper tensioning state and avoid the loosening, twisting, knotting or over-tightening and even breaking of the steel wire rope.

The invention is realized by the following technical scheme:

the tensioning device for the steel wire rope comprises a base, a driving motor, a speed reducer and three hollow stand columns, wherein the driving motor, the speed reducer and the three hollow stand columns are arranged on the base, the driving motor is fixedly installed on the base and is connected with a central rotating shaft through the speed reducer, three winding grooved wheels are fixed on the central rotating shaft, each winding grooved wheel is fixedly connected with one steel wire rope, a hanging weight is arranged in each hollow stand column, and the three steel wire ropes are fixedly connected with the bottom of a telescopic blanking pipe after bypassing the three hanging weight.

Through adopting above-mentioned technical scheme, driving motor carries out synchronous receipts through speed reducer and central pivot to the wire rope on the three winding sheave and unreels, and flexible unloading pipe's is flexible more smooth with the unloading. The base is provided with three hollow upright posts, each hollow upright post is internally provided with a hanging heavy hammer, when the steel wire rope puts the telescopic blanking pipe down to the lowest point, if a worker does not see the condition in time and turns off the driving motor, the driving motor can continue to work to unreel the steel wire rope, and at the moment, the hanging heavy hammers can move down in the hollow upright posts by virtue of self gravity to tension the steel wire rope, so that the steel wire rope is prevented from loosening, twisting and knotting; when the steel wire rope contracts the telescopic blanking pipe to the highest point (namely the telescopic blanking pipe is shortest), if a worker does not see the condition in time and turns off the driving motor, the driving motor can continue to work to roll the steel wire rope, at the moment, the steel wire rope stored in the hollow upright post can continue to be rolled on the winding grooved wheel, the hanging heavy hammer rises at the same time, and the steel wire rope still keeps proper tension. When the telescopic blanking pipe is contracted due to the existence of the hanging heavy hammer, the winding of the steel wire rope has a certain buffer room, the available observation and operation time of workers is prolonged, and the situation that the steel wire rope is continuously wound and torn by a driving motor or the driving motor is damaged after the telescopic blanking pipe is shortened to the shortest length is avoided.

Further setting the following steps: the base of one side, far away from the central rotating shaft, of each hollow stand column is provided with a circular mounting hole for mounting a telescopic blanking pipe, three rope penetrating holes are uniformly formed in the base in a mode that the base surrounds the circular mounting hole, a plurality of guide grooved pulleys are arranged on the base in a mode that the base surrounds the circular mounting hole, two support grooved pulleys are symmetrically arranged at the top of each stand column, and the steel wire rope sequentially bypasses one support grooved pulley, the hanging heavy hammer and the other support grooved pulley, then bypasses the guide grooved pulleys and penetrates through the rope penetrating holes, and finally is connected with the bottom of the telescopic blanking pipe.

By adopting the technical scheme, after the steel wire rope extends out of the winding grooved pulley, the steel wire rope firstly bypasses one of the supporting grooved pulleys, the hanging heavy hammer and the other supporting grooved pulley, then bypasses the guide grooved pulley and then passes through the rope threading hole to be connected with the bottom of the telescopic discharging pipe, the steel wire rope is well supported and guided from the winding grooved pulley to the bottom of the telescopic discharging pipe, the stress on each part of the steel wire rope is more uniform, the steel wire rope is not easy to generate mechanical fatigue, and the service life is longer.

Further setting the following steps: the one end of center pivot is equipped with the external screw thread, thread fit has the stroke piece on the external screw thread, be equipped with on the base with driving motor electric connection's first travel switch, work as wire rope rolling extremely the sash weight top with when the hollow stand top is leveled, the stroke piece is in move to with first travel switch butt in the center pivot.

By adopting the technical scheme, when the driving motor drives the central rotating shaft to rotate, the steel wire rope is wound to the shortest telescopic blanking pipe, if the driving motor continues to operate, the steel wire rope in the hollow upright post is driven to be wound, the hoisting hammer in the hollow upright post rises, and the equipment is operated for certain observation time and reaction time of workers. When the top of hanging the weight rises to when level with the top of hollow stand, wire rope has been rolled to being close the limit, and the stroke piece moves to and first travel switch butt in central pivot this moment, and first travel switch disconnection driving motor's power stops to carry out the rolling to wire rope, avoids wire rope tension to cause mechanical damage. Thereby form an automatic protection mechanism, even the staff does not in time observe the shrink condition of flexible unloading pipe, also can protect wire rope not receive too big pulling force, wire rope is difficult for the fracture, and life is longer, and the security is better.

Further setting the following steps: every be equipped with the restriction subassembly in the hollow stand, the restriction subassembly includes supporting seat, restriction pole, magnetic block and electro-magnet, the equal fixed mounting of supporting seat and electro-magnet is in the hollow stand, restriction pole one end is followed the radial activity of hollow stand passes supporting seat and one end are relative with the electro-magnet, the magnetic block gomphosis is installed the restriction pole with the one end that the electro-magnet is relative, be equipped with the confession on the hanging weight the restriction pole is kept away from the one end male restriction hole of electro-magnet.

By adopting the technical scheme, when the telescopic blanking pipe descends to the filling opening (the lowest point) of the tank car, if the driving motor continues to operate, the length of the steel wire rope in the hollow upright post can be increased, and the hoisting weight in the hollow upright post can descend. When the weight hanging hammer descends to a position where the limiting hole is opposite to the limiting rod, the electromagnet is electrified to enable the electromagnet to generate a magnetic field with the same magnetism as the magnetic block, so that magnetic repulsion acting force is generated between the electromagnet and the magnetic block, the limiting rod is pushed towards the center of the hollow upright column by the electromagnet to be inserted into the limiting hole of the weight hanging hammer, and the weight hanging hammer is fixed. The process can store the steel wire rope with a certain length in the hollow upright post, so that the steel wire rope can be buffered and adjusted to a certain extent in the last stage of shrinkage of the telescopic blanking pipe, and the available observation and operation time of workers is prolonged.

Further setting the following steps: the side wall of the hollow upright post is provided with an arc-shaped door, the arc-shaped door is provided with an opening, the outer side of the opening is welded with a mounting box communicated with the inner cavity of the hollow upright post, and the supporting seat and the electromagnet are fixedly mounted in the mounting box.

Through adopting above-mentioned technical scheme, set up the mounting box on arc door, supporting seat, electro-magnet are all installed in the mounting box, then can open arc door and overhaul the maintenance to supporting seat, electro-magnet, restriction pole and magnetic block, and it is more convenient to overhaul.

Further setting the following steps: and when the hanging heavy hammer moves to the position where the limiting hole is opposite to the limiting rod, the bottom of the hanging heavy hammer is abutted to the second travel switch and the third travel switch.

By adopting the technical scheme, when the hanging weight hammer moves downwards to the limit hole and is aligned with the limit rod, the bottom of the hanging weight hammer is abutted against the second travel switch and the third travel switch, before the bottom of the hanging weight hammer triggers the second forming switch, magnetic attraction is formed between the electromagnet and the magnetic block, the electromagnet pulls and adsorbs the limit rod to one side far away from the central axis of the hollow upright post through the magnetic block, and therefore the normal descending of the hanging weight hammer is not hindered; when the hoisting weight drops to the bottom to trigger the second travel switch, the second travel switch switches the current in the electromagnet into reverse current, at the moment, repulsive force is generated between the electromagnet and the magnetic suction block, the electromagnet pushes the limiting rod into the limiting hole with one end inserted into the hoisting weight through the magnetic suction block, and the limiting of the hoisting weight is realized. Meanwhile, the bottom of the hanging heavy hammer triggers a third travel switch, and the third travel switch cuts off a power supply of a driving motor, so that the steel wire rope is not unreeled any more, and automatic control of reeling and unreeling of the steel wire rope is realized.

Further setting the following steps: hang heavy hammer and include the tubulose outer tube of cylinder and locate pulley in the outer tube, integrated into one piece has the weight of hanging in the outer tube, it is used for rotating the installation to hang to be fixed with on the weight the mount pad of pulley, the pulley rotates to be installed on the mount pad, wire rope walks around the pulley.

Through adopting above-mentioned technical scheme, hang heavy hammer by the tubulose outer tube of cylinder with rotate the pulley of installation in the outer tube and constitute, wire rope through walk around the pulley and be connected with hanging heavy hammer, then wire rope receives frictional resistance when hanging the heavy hammer littleer, receive and unreel convenient and fast more.

Further setting the following steps: be equipped with the confession on the base the stroke piece carries out the support bar that slides, follow on the support bar the adjustment tank has been seted up to the extending direction of center pivot, first travel switch bottom slidable mounting be in fix through the bolt in the adjustment tank.

Through adopting above-mentioned technical scheme, first travel switch slidable mounting is fixed through bolt and support bar in the adjustment tank, then first travel switch is adjustable in position on the support bar, conveniently adjusts the storage length of wire rope in hollow stand as required.

In conclusion, the beneficial technical effects of the invention are as follows:

(1) the base is provided with a hollow upright post, a hanging weight for the steel wire rope to pass around is arranged in the hollow upright post, when the steel wire rope puts the telescopic blanking pipe down to the lowest point, the hanging weight can move down in the hollow upright post by virtue of self gravity to tension the steel wire rope, and the steel wire rope is prevented from loosening, twisting and knotting; when the steel wire rope contracts the telescopic blanking pipe to the highest point (namely the telescopic blanking pipe is shortest), the steel wire rope stored in the hollow upright post can be continuously wound on the winding grooved wheel, so that when the telescopic blanking pipe contracts, the winding of the steel wire rope has a certain buffer space, the available observation and operation time of a worker is prolonged, and the situation that the steel wire rope is continuously wound and torn by a driving motor or the driving motor is damaged after the telescopic blanking pipe is shortened to the shortest point is avoided;

(2) the stroke piece is arranged on the central rotating shaft, the first stroke switch is arranged on the base, the central rotating shaft drives the stroke piece to move when rotating, when the top of the hanging heavy hammer rises to be flush with the top of the hollow upright post, the steel wire rope is wound to the approximate limit, the stroke piece moves on the central rotating shaft to be abutted against the first stroke switch, the first stroke switch disconnects a power supply of the driving motor, the steel wire rope is stopped being wound, an automatic protection mechanism is formed, mechanical damage caused by over-tightening of the steel wire rope is avoided, and the service life of the steel wire rope is prolonged;

(3) a limiting assembly for limiting the hoisting weight is arranged in the hollow upright post, when the hoisting weight descends to the bottom and is abutted against the second travel switch and the third travel switch, the second travel switches the current direction in the electromagnet, so that the electromagnet generates a magnetic field with the same magnetism as the magnetic block, magnetic repulsion acting force is generated on the magnetic block, and the limiting rod is pushed to the center of the hollow upright post to be inserted into a limiting hole of the hoisting weight, so that the hoisting weight is fixed; the process can store the steel wire rope with a certain length in the hollow upright post, so that the steel wire rope can be buffered and adjusted to a certain extent in the last stage of shrinkage of the telescopic blanking pipe, and the available observation and operation time of workers is prolonged.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged schematic view of region A in FIG. 1;

FIG. 3 is a top view of the present invention;

fig. 4 is a sectional view taken in the direction of a-a in fig. 3.

Reference numerals: 1. a base; 2. a drive motor; 3. a speed reducer; 4. a hollow upright post; 5. a central rotating shaft; 6. winding the grooved pulley; 7. a wire rope; 8. hanging a heavy hammer; 9. a circular mounting opening; 10. a stringing hole; 11. a guide sheave; 12. a support sheave; 13. a stroke member; 14. a first travel switch; 15. a restraining component; 16. a supporting seat; 17. a restraining bar; 18. an electromagnet; 19. a limiting aperture; 20. an arc-shaped leaf door; 21. mounting a box; 22. a second travel switch; 23. a third travel switch; 24. an outer tube; 25. a pulley; 26. hoisting a weight block; 27. a mounting seat; 28. a supporting strip; 29. an adjustment groove; 30. a threaded shaft sleeve; 31. and abutting against the strip.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the tensioning device for a steel wire rope 7 disclosed by the invention comprises a base 1, three hollow columns 4 vertically fixed on the base 1, a driving motor 2 fixedly installed on the base 1 and a speed reducer 3. Three hollow stand 4 are the linear equidistance and arrange on base 1, and driving motor 2 fixed mounting is connected with speed reducer 3 on base 1 and the output, and the output shaft fixedly connected with of speed reducer 3 center pivot 5, center pivot 5 extend along three hollow stand 4's array direction. Three winding grooved wheels 6 are fixed on the central rotating shaft 5, the central axes of the three winding grooved wheels 6 are parallel to the central rotating shaft 5, and the three winding grooved wheels 6 correspond to the three hollow upright posts 4 one by one. The three winding grooved wheels 6 are respectively and fixedly connected with a steel wire rope 7, one ends of the three steel wire ropes 7 are fixed and wound on the winding grooved wheels 6, and the other ends of the three steel wire ropes 7 are respectively and fixedly connected with the bottom of a telescopic blanking pipe (not shown in the figure) after bypassing the three hanging heavy hammers 8.

When the steel wire rope 7 puts the telescopic blanking pipe to the lowest point, if a worker does not see the condition in time and turns off the driving motor 2, the driving motor 2 can continue to work to unreel the steel wire rope 7, and at the moment, the hanging heavy hammer 8 can move downwards in the hollow upright post 4 by virtue of the gravity of the hanging heavy hammer so as to tension the steel wire rope 7, so that the steel wire rope 7 is prevented from loosening, twisting and knotting. When the steel wire rope 7 contracts the telescopic discharging pipe to the highest point (namely the telescopic discharging pipe is shortest), if a worker does not see the condition in time and closes the driving motor 2, the driving motor 2 can continue to work to roll the steel wire rope 7, at the moment, the steel wire rope 7 stored in the hollow upright post 4 can continue to be rolled on the winding grooved pulley 6, when the telescopic discharging pipe contracts, the steel wire rope 7 is rolled to have a certain buffer room, the available observation and operation time of the worker is prolonged, and the situation that the driving motor 2 continues to roll and tear the steel wire rope 7 or damage the driving motor 2 after the telescopic discharging pipe is shortened to the shortest point is avoided.

Referring to fig. 1 and 3, a circular mounting opening 9 for mounting a telescopic blanking pipe is formed in a base 1 on one side, away from a central rotating shaft 5, of the three hollow columns 4, three rope threading holes 10 are uniformly formed in the base 1 around the circular mounting opening 9 in the circumferential direction, and one rope threading hole 10 is opposite to the hollow column 4 in the middle of the three hollow columns 4. Four guide sheaves 11 are arranged on the base 1 around the circular mounting opening 9, wherein two guide sheaves 11 are respectively close to and face two hollow columns 4 on two sides of the three hollow columns 4, and the other two guide sheaves 11 are arranged on the base 1 on one side of a rope penetrating hole 10 far away from the central column. The top of each upright post is symmetrically provided with two supporting grooved wheels 12, and the central axes of the supporting grooved wheels 12 are parallel to the central rotating shaft 5. Two steel wire ropes 7 positioned on two sides respectively pass through one supporting sheave 12, a sling weight 8 and the other supporting sheave 12 on the hollow upright posts 4 on two sides in sequence, then pass through a rope threading hole 10 after passing through one or two guide sheaves 11, and finally are connected with the bottom of the telescopic blanking pipe. The steel wire rope 7 in the middle sequentially bypasses one supporting sheave 12, the sling weight 8 and the other supporting sheave 12 on the central hollow upright post 4, then directly passes through the rope threading hole 10 corresponding to the position of the central hollow upright post 4 and is connected with the bottom of the telescopic blanking pipe.

Referring to fig. 2, one end of the central rotating shaft 5 is provided with an external thread on which a stroke piece 13 is threadedly fitted. The stroke piece 13 includes a threaded bushing 30 and an abutment bar 31 integrally formed with the threaded bushing 30, and the threaded bushing 30 is screw-fitted to one end of the central rotating shaft 5. An L-shaped supporting strip 28 is fixedly welded on the base 1, and the bottom of the abutting strip 31 abuts against the upper surface of the supporting strip 28. The support bar 28 is provided with an adjusting groove 29 along the extending direction of the central rotating shaft 5, and the first travel switch 14 electrically connected with the driving motor 2 is installed in the adjusting groove 29. The bottom of the first travel switch 14 is in an i shape and is embedded into the adjusting groove 29, the bottom of the first travel switch 14 and the support bar 28 are both provided with a plurality of threaded holes, and the first travel switch 14 is relatively fixed with the base 1 through a bolt (not shown in the figure) matched with the threads in the threaded holes. When the steel wire rope 7 is wound to the top of the hanging hammer and the top of the hollow upright post 4 is level, the threaded shaft sleeve 30 moves on the central rotating shaft 5 until the abutting strip 31 abuts against the first travel switch 14, and the power supply of the driving motor 2 is disconnected.

When the top of the hoisting hammer 8 rises to be level with the top of the hollow upright post 4, the steel wire rope 7 is wound to the approaching limit, and at the moment, the abutting strip 31 moves to abut against the first travel switch 14, so that the first travel switch 14 is disconnected with the power supply of the driving motor 2, the steel wire rope 7 is stopped to be wound, and the steel wire rope 7 is prevented from being excessively tightened to cause mechanical damage.

Referring to fig. 1 and 4, each hollow upright post 4 is provided with a limiting assembly 15, each limiting assembly 15 includes a supporting seat 16, a limiting rod 17, a magnetic block (not shown in the figure) and an electromagnet 18, the supporting seat 16 and the electromagnet 18 are both fixedly installed in the hollow upright post 4, one end of the limiting rod 17 movably penetrates through the supporting seat 16 along the radial direction of the hollow upright post 4 and is opposite to the electromagnet 18, the magnetic block is embedded and installed at one end of the limiting rod 17 opposite to the electromagnet 18, and the sling weight 8 is provided with a limiting hole 19 for inserting one end of the limiting rod 17 far away from the electromagnet 18. The hanging weight 8 comprises a cylindrical outer tube 24 and a pulley 25 arranged in the outer tube 24, the limiting hole 19 is positioned on the side circumferential surface of the outer tube 24, a hanging weight block 26 is integrally formed in the outer tube 24, a mounting seat 27 for rotatably mounting the pulley 25 is fixed on the hanging weight block 26, the pulley 25 is rotatably mounted on the mounting seat 27, and the steel wire rope 7 is connected with the hanging weight 8 by bypassing the pulley 25.

In order to facilitate the maintenance of the limiting assembly 15, an arc-shaped door 20 is arranged on the side wall of the hollow upright post 4, an opening is formed in the arc-shaped door 20, a mounting box 21 communicated with the inner cavity of the hollow upright post 4 is welded on the outer side of the opening, and the supporting seat 16 and the electromagnet 18 are fixedly mounted in the mounting box 21. The arc-shaped door 20 is provided with a second travel switch 22 for switching the current direction in the electromagnet 18 and a third travel switch 23 for controlling the on-off of the driving motor 2, the second travel switch 22 is electrically connected with the electromagnet 18, and the third travel switch 23 is electrically connected with the driving motor 2. When the hanging weight 8 moves to the position where the limiting hole 19 is aligned with the limiting rod 17, the bottom of the hanging weight 8 abuts against the second stroke switch 22 and the third stroke switch 23. The first travel switch 14 and the third travel switch 23 can both connect or disconnect the power supply of the driving motor 2, but the first travel switch 14 and the third travel switch 23 are not interfered with each other and are in two mutually independent circuits.

When the hanging weight 8 descends to the position where the limiting hole 19 is aligned with the limiting rod 17, the bottom of the hanging weight 8 is abutted against the second travel switch 22, the second travel switch 22 switches the current direction in the electromagnet 18 to enable the electromagnet 18 to generate a magnetic field with the same magnetism as the magnetic block, so that magnetic repulsion acting force is generated between the electromagnet 18 and the magnetic block, the electromagnet 18 pushes the limiting rod 17 towards the center of the hollow upright column 4 to the limiting hole 19 inserted into the hanging weight 8, and the hanging weight 8 is fixed. The process can store the steel wire rope 7 with a certain length in the hollow upright post 4, so that the steel wire rope 7 can be buffered and adjusted to a certain extent in the last stage of shrinkage of the telescopic blanking pipe, and the available observation and operation time of workers can be prolonged.

The hanging weight 8 comprises a cylindrical outer tube 24 and a pulley 25 arranged in the outer tube 24, a hanging weight block 26 is integrally formed in the outer tube 24, an installation seat 27 for rotatably installing the pulley 25 is fixed on the hanging weight block 26, the pulley 25 is rotatably installed on the installation seat 27, and the steel wire rope 7 passes around the pulley 25.

The implementation principle and the beneficial effects of the embodiment are as follows: the hanging weight 8 is arranged in the hollow upright post 4, the steel wire rope 7 bypasses the hanging weight 8 and then is connected with the bottom of the telescopic blanking pipe, and the hanging weight 8 can play a good role in buffering and protecting in the winding and unwinding processes of the steel wire rope 7, so that the steel wire rope 7 is prevented from loosening, twisting and knotting, mechanical fatigue and even breakage caused by over-tensioning of the steel wire rope 7 are also prevented, and the working safety is improved.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. A tensioning device of a steel wire rope is characterized in that: the feeding device comprises a base (1), a driving motor (2) arranged on the base (1), a speed reducer (3) and three hollow stand columns (4), wherein the driving motor (2) is fixedly arranged on the base (1) and connected with a central rotating shaft (5) through the speed reducer (3), three winding grooved wheels (6) are fixed on the central rotating shaft (5), each winding grooved wheel (6) is fixedly connected with a steel wire rope (7), a hanging weight hammer (8) is arranged in each hollow stand column (4), and the three steel wire ropes (7) are fixedly connected with the bottom of a telescopic discharging pipe after respectively bypassing the three hanging weight hammers (8); an external thread is arranged at one end of the central rotating shaft (5), a stroke piece (13) is in threaded fit with the external thread, a first stroke switch (14) electrically connected with the driving motor (2) is arranged on the base (1), and when the steel wire rope (7) is wound to the top of the hanging heavy hammer (8) to be flush with the top of the hollow upright post (4), the stroke piece (13) moves on the central rotating shaft (5) to be abutted against the first stroke switch (14); a second travel switch (22) for switching the current direction in the electromagnet (18) and a third travel switch (23) for controlling the on-off of the driving motor (2) are arranged on the hollow upright post (4), and when the hanging heavy hammer (8) moves to the position where the limiting hole (19) is aligned with the limiting rod (17), the bottom of the hanging heavy hammer (8) is abutted against the second travel switch (22) and the third travel switch (23); the stroke piece (13) comprises a threaded shaft sleeve (30) and an abutting strip (31) which is integrally formed with the threaded shaft sleeve (30), and the threaded shaft sleeve (30) is in threaded fit with one end of the central rotating shaft (5); an L-shaped supporting strip (28) is fixedly welded on the base (1), and the bottom of the abutting strip (31) abuts against the upper surface of the supporting strip (28); an adjusting groove (29) is formed in the supporting bar (28) along the extending direction of the central rotating shaft (5), and a first travel switch (14) electrically connected with the driving motor (2) is installed in the adjusting groove (29); the bottom of the first travel switch (14) is I-shaped and is embedded into the adjusting groove (29), a plurality of threaded holes are formed in the bottom of the first travel switch (14) and the supporting bar (28), and the first travel switch (14) is relatively fixed with the base (1) through matching of a bolt in the threaded holes; when the steel wire rope (7) is wound to the position that the top of the hanging hammer is flush with the top of the hollow upright post (4), the threaded shaft sleeve (30) moves on the central rotating shaft (5) to the position that the abutting strip (31) abuts against the first travel switch (14), and the power supply of the driving motor (2) is disconnected; a circular mounting opening (9) for mounting a telescopic blanking pipe is formed in a base (1) on one side, away from a central rotating shaft (5), of three hollow columns (4), the base (1) is uniformly provided with three rope penetrating holes (10) around the circular mounting opening (9), the base (1) is provided with a plurality of guide grooved pulleys (11) around the circular mounting opening (9), the top of each column is symmetrically provided with two support grooved pulleys (12), and a steel wire rope (7) sequentially bypasses one support grooved pulley (12), a hoisting hammer (8) and the other support grooved pulley (12), then bypasses the guide grooved pulley (11), penetrates through the rope penetrating hole (10) and is finally connected with the bottom of the telescopic blanking pipe; an arc-shaped door leaf (20) is arranged on the side wall of the hollow upright post (4), an opening is formed in the arc-shaped door leaf (20), a mounting box (21) communicated with the inner cavity of the hollow upright post (4) is welded to the outer side of the opening, and the supporting seat (16) and the electromagnet (18) are fixedly mounted in the mounting box (21); a limiting assembly (15) is arranged in each hollow upright post (4), each limiting assembly (15) comprises a supporting seat (16), a limiting rod (17), a magnetic block and an electromagnet (18), the supporting seats (16) and the electromagnets (18) are fixedly arranged in the hollow upright posts (4), one end of each limiting rod (17) penetrates through the supporting seats (16) in a movable mode along the radial direction of the hollow upright posts (4), one end of each limiting rod (17) is opposite to the corresponding electromagnet (18), the magnetic blocks are embedded and arranged at one ends, opposite to the electromagnets (18), of the limiting rods (17), and limiting holes (19) for inserting one ends, far away from the electromagnets (18), of the limiting rods (17) are formed in the hoisting hammer (8); the hanging weight (8) comprises a cylindrical tubular outer pipe (24) and a pulley (25) arranged in the outer pipe (24), a hanging weight block (26) is integrally formed in the outer pipe (24), an installation seat (27) used for rotatably installing the pulley (25) is fixed on the hanging weight block (26), the pulley (25) is rotatably installed on the installation seat (27), and the steel wire rope (7) bypasses the pulley (25).