Steel wire rope compacting device for telescopic boom crane of engineering machinery

Abstract

The invention relates to the technical field of hammering machinery, in particular to a steel wire rope compacting device for a telescopic boom crane of engineering machinery, which comprises a plurality of groups of compacting units which are rotatably arranged at a certain angle by taking a steel wire rope as an axis; the compaction unit specifically comprises a supporting stand, a movable compression roller and a fixed compression roller, the movable compression roller and the fixed compression roller are rotationally arranged in the supporting stand, and a lifting supporting plate is further arranged in the supporting stand; according to the steel wire rope compacting device, in the rolling and compacting process of the steel wire rope, radial high-frequency hammering force is generated, impact energy generated by hammering can permeate into the deep positions of the interiors of four thick steel wire ropes, and the contact state of strand cores and outer steel wires is improved.

Description

Technical Field

[0001] The invention relates to the technical field of hammer pressing machinery, in particular to a steel wire rope compacting device for a telescopic boom crane of engineering machinery. Background Art

[0002] The steel wire rope used in telescopic boom cranes of construction machinery is mainly a four-strand steel wire rope. During the production process, the circular cross-section strands need to be radially compressed into fan-shaped cross-section strands after the rope is synthesized, so that the cross-sectional density of the steel wire rope is higher and the cross-section is closer to a circle. However, the four-strand steel wire rope is relatively thick. The compaction device in traditional technology continuously squeezes the steel wire rope through two pressure rollers. Faced with the four-strand steel wire rope with a thicker diameter, the outer strands are the first to undergo plastic deformation under the initial pressure. The deformation process will consume most of the pressure energy, and the pressure is difficult to penetrate deep into the interior of the steel wire rope, resulting in insufficient compaction effect. Summary of the Invention

[0003] The object of the present invention is to provide a wire rope compacting device for a telescopic boom crane of an engineering machinery, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a wire rope compacting device for a telescopic boom crane of an engineering machinery, comprising a plurality of compacting units, wherein the plurality of compacting units are arranged to rotate at a certain angle with the wire rope as the axis;

[0005] The compacting unit specifically includes a support frame, a dynamic pressure roller and a fixed pressure roller, the dynamic pressure roller and the fixed pressure roller are both rotatably arranged inside the support frame, the support frame is also provided with a lifting support plate, which drives the dynamic pressure roller to move up and down through the lifting support plate, and a pressure top shaft is provided above the lifting support plate, which applies downward pressure to the lifting support plate through the pressure top shaft, so that the dynamic pressure roller moves closer to the fixed pressure roller to compact the wire rope; a hammer assembly is also provided on the upper part of the lifting support plate, which generates impact pressure for the lifting support plate to move downward through the hammer assembly;

[0006] The dynamic pressure roller and the fixed pressure roller are respectively provided with transverse grooves, which are distributed in a circular array, and wedge-shaped plug plates are inserted into the transverse grooves; the dynamic pressure roller and the fixed pressure roller are respectively provided with conversion components, which switch the support state of the wedge-shaped plug plates in the transverse grooves.

[0007] The hammer assembly specifically includes a limiting ring and an annular hammer block, which are both sleeved on the outside of the pressure top shaft. The annular hammer block is located below the limiting ring and is limited by the limiting ring. A support spring is provided at the lower part of the annular hammer block, which provides an upward supporting elastic force to the annular hammer block, so that the annular hammer block has an upward movement tendency.

[0008] An electromagnet is embedded and fixed on the lifting support plate. When the electromagnet is energized, it can generate magnetic force to attract the annular hammer block to overcome the elastic force of the supporting spring and collide with the electromagnet.

[0009] The dynamic pressure roller and the fixed pressure roller are respectively provided with roller inner cavities, and the conversion component specifically includes a limiting side groove, a limiting side convex and a trapezoidal groove. The side of the transverse groove is provided with a limiting side groove, and the side of the wedge-shaped plug plate is fixedly provided with a limiting side convex. The limiting side convex is limitedly matched with the limiting side groove so that the wedge-shaped plug plate is flush with the outer surface pressure groove of its corresponding dynamic pressure roller or fixed pressure roller, and the trapezoidal groove is provided on the wedge-shaped plug plate.

[0010] Two sets of conversion discs are provided inside the inner cavity of the roller, which support the wedge-shaped plug plate so that the wedge-shaped plug plate is flush with the outer surface pressure groove of its corresponding dynamic pressure roller or fixed pressure roller;

[0011] When the conversion disc moves to the trapezoidal groove, the wedge-shaped plug plate can retract and move inward along the transverse groove.

[0012] A square clamping portion is fixedly provided on the conversion disk, and square grooves are symmetrically provided on both sides of the roller inner cavity. The square clamping portion is inserted into the square groove. The square groove and the square clamping portion are limited and cooperated so that the conversion disk can only move axially. A conversion screw is spirally cooperated in the square clamping portion, and two groups of symmetrical threads are provided on the conversion screw. The rotation of the conversion screw can drive the two groups of conversion disks to move synchronously in reverse. A conversion button cap is provided at one end of the conversion screw.

[0013] The dynamic pressure roller and the fixed pressure roller are respectively provided with a butt end hole and an air supply channel. The butt end hole is connected to the roller inner cavity through the air supply channel. A gas supply cannula is inserted into the butt end hole. The gas supply cannula and the butt end hole can rotate relative to each other and maintain airtight contact. A pressure relief valve is provided on the air supply channel. When the gas pressure in the air supply channel exceeds a certain intensity, the gas is discharged to the outside atmosphere through the pressure relief valve.

[0014] An axial sliding groove is provided on the pressure top shaft, and the limiting ring can slide on the outside of the pressure top shaft through the axial sliding groove. A pressure spring is provided on the upper part of the limiting ring, and downward elastic pressure is applied to the limiting ring through the pressure spring. The elastic force of the pressure spring is smaller than the elastic force of the supporting spring.

[0015] A sealing coupling is fixedly provided on the limiting ring, a gas cavity is opened in the pressure top shaft, a piston portion is provided in the gas cavity, the piston portion and the gas cavity are in sealing contact, the lower end of the sealing coupling is fixedly installed with the piston portion, and the sealing coupling seal is inserted through the top of the gas cavity.

[0016] An air intake one-way valve is provided in the pressure top shaft, and the air intake one-way valve is connected to the upper part of the gas cavity, so that the external gas flows into the gas cavity in a one-way manner;

[0017] A lateral output channel is provided in the pressure top shaft, one end of the lateral output channel is connected to the upper part of the gas chamber, and the other end passes downward; a support plate docking hole is provided on the lifting support plate, and when the pressure top shaft is in squeeze contact with the lifting support plate, the lateral output channel and the support plate docking hole are docked and connected, and an output one-way valve is provided in the support plate docking hole, and the output one-way valve allows the gas in the gas chamber to flow outward in one direction; the support plate docking hole is connected to the gas supply tube through a pipeline.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The wire rope compacting device of the present invention cooperates with structures such as the hammer assembly and the dynamic pressure roller to generate radial high-frequency hammering force during the roller compaction of the wire rope. The impact energy generated by the hammering can penetrate deep into the thicker four-strand wire rope, improve the contact state between the strand core and the outer steel wire, reduce the residual stress caused by cold deformation, and improve the compaction effect.

[0020] The present invention utilizes a combination of transverse grooves, a wedge-shaped plug plate, and a conversion assembly to switch the functionality of the dynamic and fixed pressure rollers. This allows the compaction device to emboss the wire rope with transverse grooves perpendicular to its length, thereby increasing contact friction and, under certain operating conditions, reducing relative slip between the wire rope and external equipment such as pulleys. The conversion assembly's structural configuration allows for convenient switching between the dynamic and fixed pressure rollers, eliminating the need to disassemble or replace them, making them more convenient to use.

[0021] The present invention utilizes the rebound energy of the annular hammer block through the coordination of the structures such as the limit ring, gas cavity, gas supply tube and gas supply channel, generates impact-fluctuating airflow, and inputs the airflow into the inner cavity of the roller, so that the gaps between the transverse grooves and the wedge-shaped plug plates are in a positive pressure state, effectively reducing the entry of powder and foreign matter, and the positive pressure has fluctuating impact, and the fluctuating gas impact has better powder flushing ability, thereby extending the service life of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a front view of the overall structure of the present invention.

[0024] Figure 3 It is a three-dimensional half-section schematic diagram of the present invention.

[0025] Figure 4 for Figure 3 Enlarged schematic diagram of area A in the middle.

[0026] Figure 5 for Figure 3 Enlarged schematic diagram of area B in the middle.

[0027] Figure 6 It is a three-dimensional half-section front view of the present invention.

[0028] Figure 7 for Figure 6 Enlarged schematic diagram of area C in the middle.

[0029] Figure 8 for Figure 6 Enlarged schematic diagram of area D in the middle.

[0030] Figure 9 It is a three-dimensional half-section schematic diagram of the present invention from another angle.

[0031] Figure 10 for Figure 9 Enlarged schematic diagram of area E in the middle.

[0032] Figure 11 Schematic diagram of the separation of transverse grooves and wedge-shaped plug plates.

[0033] In the figure: 1, support frame; 2, dynamic pressure roller; 3, fixed pressure roller; 4, lifting support plate; 5, pressure top shaft; 6, horizontal groove; 7, wedge plug plate; 501, limit ring; 502, annular hammer block; 503, support spring; 504, electromagnet; 8, roller cavity; 601, limit side groove; 602, limit side convex; 603, trapezoidal groove; 604, conversion plate; 605, square clamp; 606, square groove; 607, conversion screw; 608, Conversion button cap; 609, docking end hole; 610, gas supply channel; 611, gas supply tube; 612, pressure relief valve; 505, axial slide groove; 506, top pressure spring; 507, sealing coupling; 508, gas chamber; 509, piston part; 510, air inlet check valve; 511, lateral output channel; 512, support plate docking hole; 513, output check valve; 101, hydraulic cylinder; 401, rubber ring; 514, pressure equalizing side groove; 9, device substrate. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0035] See also Figures 1 to 11The present invention provides a technical solution: a steel wire rope compacting device for a telescopic boom crane of an engineering machinery, comprising a plurality of compacting units, wherein the plurality of compacting units are arranged to rotate at a certain angle with the steel wire rope as the axis;

[0036] like Figure 1 As shown in , the wire rope compacting device of the present invention further includes a device base plate 9;

[0037] The compacting units are all fixedly arranged on the device substrate 9, and the compacting units are fixedly mounted to the external machinery through the device substrate 9.

[0038] The compaction unit specifically includes a support frame 1, a dynamic pressure roller 2 and a fixed pressure roller 3. The dynamic pressure roller 2 and the fixed pressure roller 3 are both rotatably arranged inside the support frame 1. The support frame 1 is also provided with a lifting support plate 4, such as Figure 1 As shown in the figure, the lifting support plate 4 is in an inverted U shape, and the dynamic pressure roller 2 is driven to move up and down by the lifting support plate 4. A pressure top shaft 5 is provided above the lifting support plate 4, and downward pressure is applied to the lifting support plate 4 by the pressure top shaft 5, so that the dynamic pressure roller 2 moves closer to the fixed pressure roller 3 to compact the wire rope; a hammer component is also provided on the upper part of the lifting support plate 4, and the hammer component causes the lifting support plate 4 to generate downward impact pressure; the dynamic pressure roller 2 and the fixed pressure roller 3 are respectively provided with transverse grooves 6, and the transverse grooves 6 are distributed in a circular array, and a wedge-shaped plug plate 7 is inserted in the transverse grooves 6; the dynamic pressure roller 2 and the fixed pressure roller 3 are respectively provided with conversion components, and the conversion components switch the support state of the wedge-shaped plug plate 7 in the transverse grooves 6.

[0039] like Figure 4 As shown in , the hammer assembly specifically includes a limiting ring 501 and an annular hammer block 502. Both the limiting ring 501 and the annular hammer block 502 are sleeved on the outside of the pressure top shaft 5. The annular hammer block 502 is located below the limiting ring 501 and is limited by the limiting ring 501. A support spring 503 is provided at the bottom of the annular hammer block 502. The support spring 503 provides an upward support elastic force to the annular hammer block 502, which makes the annular hammer block 502 have an upward movement tendency. An electromagnet 504 is embedded and fixed on the lifting support plate 4. When energized, the electromagnet 504 can generate magnetic force, attracting the annular hammer block 502 to overcome the elastic force of the support spring 503 and collide with the electromagnet 504.

[0040] like Figure 5 As shown in , the dynamic pressure roller 2 and the fixed pressure roller 3 are respectively provided with a roller inner cavity 8, and the conversion component specifically includes a limiting side groove 601, a limiting side convex 602 and a trapezoidal groove 603. The side of the transverse groove 6 is provided with a limiting side groove 601, and the side of the wedge-shaped plug plate 7 is fixedly provided with a limiting side convex 602. The limiting side convex 602 is limitedly matched with the limiting side groove 601, so that the wedge-shaped plug plate 7 and its corresponding dynamic pressure roller 2 or fixed pressure roller 3 outer surface groove are flush, as shown in FIG. Figure 1As shown in FIG, the outer surface of the dynamic pressure roller 2 and the fixed pressure roller 3 is annular and has a semicircular cross section. The trapezoidal groove 603 is opened on the wedge-shaped plug plate 7.

[0041] Two sets of conversion disks 604 are provided inside the roller inner cavity 8, which support the wedge-shaped plug plate 7 so that the wedge-shaped plug plate 7 is flush with the outer surface pressure groove of its corresponding dynamic pressure roller 2 or fixed pressure roller 3; when the conversion disk 604 moves to the trapezoidal groove 603, the wedge-shaped plug plate 7 can retract and move inward along the transverse pressure groove 6.

[0042] A square clamping portion 605 is fixedly provided on the conversion disk 604, and square grooves 606 are symmetrically provided on both sides of the roller inner cavity 8. The square clamping portion 605 is inserted into the square groove 606. The square groove 606 and the square clamping portion 605 are limited by the cooperation so that the conversion disk 604 can only move axially. A conversion screw rod 607 is spirally provided in the square clamping portion 605. Two groups of symmetrical threads are provided on the conversion screw rod 607. The rotation of the conversion screw rod 607 can drive the two groups of conversion disks 604 to move synchronously in reverse. A conversion button cap 608 is provided at one end of the conversion screw rod 607.

[0043] The dynamic pressure roller 2 and the fixed pressure roller 3 are respectively provided with a docking end hole 609 and an air supply channel 610. The docking end hole 609 is connected to the roller inner cavity 8 through the air supply channel 610. An air supply cannula 611 is inserted into the docking end hole 609. The air supply cannula 611 and the docking end hole 609 can rotate relative to each other and maintain airtight contact; a pressure relief valve 612 is connected to the air supply channel 610. When the gas pressure in the air supply channel 610 exceeds a certain intensity, the gas is discharged to the outside atmosphere through the pressure relief valve 612. The pressure relief valve 612 is a pressure relief valve in traditional technology and will not be described in detail in this application.

[0044] An axial slide groove 505 is provided on the pressure top shaft 5, and the limiting ring 501 can slide within the outer limit of the pressure top shaft 5 through the axial slide groove 505. A pressure spring 506 is provided on the upper part of the limiting ring 501, and downward elastic pressure is applied to the limiting ring 501 through the pressure spring 506. The elastic force of the pressure spring 506 is less than the elastic force of the support spring 503.

[0045] A sealing coupling 507 is fixedly provided on the limiting ring 501, a gas chamber 508 is opened in the pressure top shaft 5, a piston portion 509 is provided in the gas chamber 508, the piston portion 509 and the gas chamber 508 are in sealing contact, the lower end of the sealing coupling 507 is fixedly installed with the piston portion 509, and the sealing coupling 507 is sealed and inserted through the top of the gas chamber 508.

[0046] An air intake check valve 510 is provided in the pressure top shaft 5. The air intake check valve 510 is connected to the upper part of the gas chamber 508, so that the external air flows into the gas chamber 508 in a one-way manner.

[0047] A lateral output channel 511 is provided in the pressure top shaft 5, one end of the lateral output channel 511 is connected to the upper part of the gas chamber 508, and the other end passes downward; a support plate docking hole 512 is provided on the lifting support plate 4, and when the pressure top shaft 5 is squeezed and contacted with the lifting support plate 4, the lateral output channel 511 and the support plate docking hole 512 are docked and connected, and an output one-way valve 513 is provided in the support plate docking hole 512, and the output one-way valve 513 allows the gas in the gas chamber 508 to flow outward in one direction; the support plate docking hole 512 is connected to the gas supply tube 611 through a pipeline.

[0048] like Figure 3 and Figure 4 As shown in FIG, a hydraulic cylinder 101 is fixedly provided on the outside of the support frame 1, and the telescopic shaft of the hydraulic cylinder 101 is fixedly connected to the pressure top shaft 5 by a pin, and the pressure top shaft 5 is driven to telescope and move by the hydraulic cylinder 101.

[0049] like Figure 4 As shown in the figure, a rubber ring 401 is embedded in the surface of the lifting support plate 4. When the pressure top shaft 5 is squeezed into contact with the lifting support plate 4, the rubber ring 401 plays a sealing role, so that the side output channel 511 and the support plate docking hole 512 are docked and connected.

[0050] like Figure 10 and Figure 7 As shown in , a pressure-equalizing side groove 514 is opened at the lower portion of the gas chamber 508, and the lower portion of the gas chamber 508 is connected to the outside atmosphere through the pressure-equalizing side groove 514, so that when the piston part 509 moves up and down, the air pressure below the piston part 509 is balanced.

[0051] When the wire rope compacting device of the present invention is in use, the wire rope passes between the dynamic pressure roller 2 and the fixed pressure roller 3 for compaction. The compaction unit is provided with several groups, such as Figure 1 As shown in FIG, there are two groups of compaction units, and the two groups of compaction units are arranged perpendicular to each other.

[0052] During operation, the hydraulic cylinder 101 drives the pressure top shaft 5 to move, squeezing the lifting support plate 4, so that the dynamic pressure roller 2 moves closer to the fixed pressure roller 3 to compact the wire rope. When it is necessary to increase the compaction effect, such as Figure 4 As shown in , a pulsed current is passed through the electromagnet 504. When the electromagnet 504 is energized, a strong magnetic force is generated, attracting the annular hammer 502 to strike the surface of the electromagnet 504. The electromagnet 504 transmits the impact force to the lifting support plate 4, causing the dynamic pressure roller 2 to generate hammering pressure. When the current in the electromagnet 504 disappears, the magnetic force disappears, and the support spring 503 supports the annular hammer 502 to reset and move. The above cycle can generate a radial high-frequency hammering force during the roller compaction of the wire rope. The impact energy generated by the hammering can penetrate deep into the thicker four-strand wire rope, improving the contact between the strand core and the outer layer of steel wire.

[0053] like Figure 5 and Figure 11 As shown in , rotating the conversion knob cap 608 with an Allen wrench drives the conversion screw 607 to rotate. When the conversion screw 607 rotates, the two sets of conversion discs 604 inside the roller cavity 8 will move synchronously in opposite directions, bringing the conversion discs 604 closer or farther apart. By adjusting the conversion discs 604 closer together, the conversion discs 604 are now in the corresponding positions of the trapezoidal grooves 603. The wedge-shaped plug plate 7 loses the support of the conversion discs 604 and can retract. At this time, when compacting the wire rope, the horizontal grooves 6 on the surfaces of the dynamic pressure roller 2 and the fixed pressure roller 3 can emboss the wire rope with horizontal stripes perpendicular to the length of the wire rope, thereby increasing the contact friction of the wire rope. When not needed, the conversion screw 607 is reversed to separate the conversion discs 604 and re-support the wedge-shaped plug plate 7.

[0054] like Figure 4 As shown in the figure, after the electromagnet 504 is powered off and loses its elastic force, the annular hammer block 502 will rebound and hit the limit ring 501 under the elastic action of the support spring 503, driving the limit ring 501 to move upward with a small and rapid impact. When the annular hammer block 502 moves downward, the top pressure spring 506 presses the limit ring 501 to move downward and reset, so that the limit ring 501 exhibits a cyclic motion of gently moving downward and resetting, and quickly impacting and moving upward.

[0055] The piston 509 is driven to move up and down by the sealing coupling 507, and the upward movement of the piston 509 is also rapid and impactful. When the piston 509 moves downward, the external gas is sucked into the gas chamber 508 through the inlet check valve 510. When the piston 509 moves upward with rapid impact, the gas in the gas chamber 508 is sequentially input into the gas supply cannula 611 through the lateral output channel 511 and the support plate docking hole 512. Figure 5 As shown in FIG, air enters the roller cavity 8 through air delivery channel 610, creating a positive pressure in the roller cavity 8, reducing the ingress of dust and foreign matter. The positive pressure exhibits a fluctuating, impactful nature, enhancing dust removal. When the air pressure in the roller cavity 8 exceeds a certain level, it is continuously released to the outside through pressure relief valve 612.

[0056] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A wire rope compacting device for a telescopic boom crane of construction machinery, comprising a plurality of compacting units, characterized in that: Several groups of compacting units are rotated at a certain angle with the wire rope as the axis; The compacting unit specifically includes a support frame, a dynamic pressure roller and a fixed pressure roller, the dynamic pressure roller and the fixed pressure roller are both rotatably arranged inside the support frame, the support frame is also provided with a lifting support plate, which drives the dynamic pressure roller to move up and down through the lifting support plate, and a pressure top shaft is provided above the lifting support plate, which applies downward pressure to the lifting support plate through the pressure top shaft, so that the dynamic pressure roller moves closer to the fixed pressure roller to compact the wire rope; a hammer assembly is also provided on the upper part of the lifting support plate, which generates impact pressure for the lifting support plate to move downward through the hammer assembly; The dynamic pressure roller and the fixed pressure roller are respectively provided with transverse grooves, which are distributed in a circular array, and wedge-shaped plug plates are inserted into the transverse grooves; the dynamic pressure roller and the fixed pressure roller are respectively provided with conversion components, which switch the support state of the wedge-shaped plug plates in the transverse grooves.

2. The wire rope compacting device for a telescopic boom crane of construction machinery according to claim 1, characterized in that: The hammer assembly specifically includes a limiting ring and an annular hammer block, which are both sleeved on the outside of the pressure top shaft. The annular hammer block is located below the limiting ring and is limited by the limiting ring. A support spring is provided at the lower part of the annular hammer block, which provides an upward supporting elastic force to the annular hammer block, so that the annular hammer block has an upward movement tendency.

3. The wire rope compacting device for a telescopic boom crane of construction machinery according to claim 2, characterized in that: An electromagnet is embedded and fixed on the lifting support plate. When the electromagnet is energized, it can generate magnetic force to attract the annular hammer block to overcome the elastic force of the supporting spring and collide with the electromagnet.

4. The wire rope compacting device for a telescopic boom crane of construction machinery according to claim 2, characterized in that: The dynamic pressure roller and the fixed pressure roller are respectively provided with roller inner cavities, and the conversion component specifically includes a limiting side groove, a limiting side convex and a trapezoidal groove. The side of the transverse groove is provided with a limiting side groove, and the side of the wedge-shaped plug plate is fixedly provided with a limiting side convex. The limiting side convex is limitedly matched with the limiting side groove so that the wedge-shaped plug plate is flush with the outer surface pressure groove of its corresponding dynamic pressure roller or fixed pressure roller, and the trapezoidal groove is provided on the wedge-shaped plug plate.

5. The wire rope compacting device for a telescopic boom crane of construction machinery according to claim 4, characterized in that: Two sets of conversion discs are provided inside the inner cavity of the roller, which support the wedge-shaped plug plate so that the wedge-shaped plug plate is flush with the outer surface pressure groove of its corresponding dynamic pressure roller or fixed pressure roller; When the conversion disc moves to the trapezoidal groove, the wedge-shaped plug plate can retract and move inward along the transverse groove.

6. The wire rope compacting device for a telescopic boom crane of construction machinery according to claim 5, characterized in that: A square clamping portion is fixedly provided on the conversion disk, and square grooves are symmetrically provided on both sides of the roller inner cavity. The square clamping portion is inserted into the square groove. The square groove and the square clamping portion are limited and cooperated so that the conversion disk can only move axially. A conversion screw is spirally cooperated in the square clamping portion, and two groups of symmetrical threads are provided on the conversion screw. The rotation of the conversion screw can drive the two groups of conversion disks to move synchronously in reverse. A conversion button cap is provided at one end of the conversion screw.

7. The wire rope compacting device for a telescopic boom crane of construction machinery according to claim 4, characterized in that: The dynamic pressure roller and the fixed pressure roller are respectively provided with a butt end hole and an air supply channel. The butt end hole is connected to the roller inner cavity through the air supply channel. A gas supply cannula is inserted into the butt end hole. The gas supply cannula and the butt end hole can rotate relative to each other and maintain airtight contact. A pressure relief valve is provided on the air supply channel. When the gas pressure in the air supply channel exceeds a certain intensity, the gas is discharged to the outside atmosphere through the pressure relief valve.

8. The wire rope compacting device for a telescopic boom crane of construction machinery according to claim 7, characterized in that: An axial sliding groove is provided on the pressure top shaft, and the limiting ring can slide on the outside of the pressure top shaft through the axial sliding groove. A pressure spring is provided on the upper part of the limiting ring, and downward elastic pressure is applied to the limiting ring through the pressure spring. The elastic force of the pressure spring is smaller than the elastic force of the supporting spring.

9. The wire rope compacting device for a telescopic boom crane of construction machinery according to claim 8, characterized in that: A sealing coupling is fixedly provided on the limiting ring, a gas cavity is opened in the pressure top shaft, a piston portion is provided in the gas cavity, the piston portion and the gas cavity are in sealing contact, the lower end of the sealing coupling is fixedly installed with the piston portion, and the sealing coupling seal is inserted through the top of the gas cavity.

10. The wire rope compacting device for a telescopic boom crane of construction machinery according to claim 9, characterized in that: An air intake one-way valve is provided in the pressure top shaft, and the air intake one-way valve is connected to the upper part of the gas cavity, so that the external gas flows into the gas cavity in a one-way manner; A lateral output channel is provided in the pressure top shaft, one end of the lateral output channel is connected to the upper part of the gas chamber, and the other end passes downward; a support plate docking hole is provided on the lifting support plate, and when the pressure top shaft is in squeeze contact with the lifting support plate, the lateral output channel and the support plate docking hole are docked and connected, and an output one-way valve is provided in the support plate docking hole, and the output one-way valve allows the gas in the gas chamber to flow outward in one direction; the support plate docking hole is connected to the gas supply tube through a pipeline.

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