Cable crane

Abstract

A cable crane comprises a main tower and an auxiliary tower, a lifting system, a traction system and a bearing system are installed on the main tower and the auxiliary tower, a trolley is installed on a bearing cable of the bearing system, the traction system pulls the trolley to move on the bearing cable in a reciprocating mode through a traction rope, a lifting rope of the lifting system winds around the trolley, and the lifting rope is located below the trolley. A lifting hook is installed through the movable pulley, a tensioning wheel set used for tensioning the traction rope is installed on the auxiliary tower, the tensioning wheel set comprises a sliding wheel and a sliding seat, the sliding wheel is rotatably installed on the sliding seat, a sliding frame is further installed on the auxiliary tower, the sliding seat is installed on the sliding frame in a sliding and adjustable mode, a hydraulic oil cylinder is installed on the sliding frame, and the hydraulic oil cylinder is connected with the sliding seat. And the sliding seat is pulled down through the contraction of the hydraulic oil cylinder, so that the traction rope is conveniently tensioned.

Description

Technical Field

[0001] The utility model relates to the technical field of cable cranes, in particular to a cable crane. Background Art

[0002] Cable cranes, also known as cable cranes, are large-scale construction equipment used in hydropower and water conservancy projects, playing a vital role in engineering construction. Existing cable cranes' traction ropes are difficult to adjust and tension. The traction ropes can expand and contract in length due to stress or temperature. Due to the large spans and long load cables of cable cranes, these changes can be significant, affecting the crane's normal and stable operation. Similar issues also exist with the load cables of cable cranes. Utility Model Content

[0003] The technical problem to be solved by the present invention is: to solve at least one problem existing in the above-mentioned background technology, and to provide a cable machine that can at least conveniently tension a traction rope.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a cable crane, including a main tower and a sub-tower, the main tower and the sub-tower are equipped with a lifting system, a traction system and a bearing system, a trolley is installed on the bearing rope of the bearing system, and the traction system pulls the trolley back and forth on the bearing rope through the traction rope, the lifting rope of the lifting system passes around the trolley, and the lifting rope is installed with a hook through a movable pulley below the trolley, and the sub-tower is equipped with a tensioning wheel group for tensioning the traction rope, the tensioning wheel group includes a sliding wheel and a slide, and the sliding wheel is rotatably installed on the slide, and the sub-tower is also equipped with a slide, and the slide is slidably installed on the slide, and a hydraulic cylinder is installed on the slide, and the hydraulic cylinder is connected to the slide.

[0005] The two ends of the load-bearing cable are respectively connected to the main tower and the auxiliary tower. A pull plate device is installed at one end of the load-bearing cable connected to the auxiliary tower, and the pull plate device is then connected to the auxiliary tower.

[0006] It also includes a tensioning system, which includes a tensioning winch, a first tensioning rope and a second tensioning rope. The first tensioning rope and the second tensioning rope are respectively wound and installed on the hoisting drum of the tensioning winch. When the first tensioning rope is connected to the pulling plate device, it is used to tension the load-bearing rope. When the second tensioning rope is connected to the tensioning wheel group, it is used to tension the traction rope.

[0007] The auxiliary tower is equipped with a traction rope driving device, a second guide wheel and a third guide wheel. The second guide wheel is located on the upper side of the pulling plate device, the third guide wheel is located on the upper side of the second guide wheel, and the sliding wheel is located on the lower side of the second guide wheel. The traction rope passes around the lower side of the tenth guide wheel on the pulling plate device, and then passes around the traction rope driving device, and then passes around from above the second guide wheel, and then passes around from the lower side of the sliding wheel, and then passes around from the upper side of the third guide wheel. The sliding wheel is rotatably installed on the slide seat through a fixed axis.

[0008] The tensioning system also includes a fourth guide wheel, which is installed on the auxiliary tower and located below the sliding wheel. The second tensioning rope passes around the fourth guide wheel from below and is connected to the tensioning wheel group.

[0009] The second pull rope passes around the fourth guide wheel from below and is connected to the fixed shaft.

[0010] The auxiliary tower is provided with a fifth guide wheel on the side connected to the load-bearing cable and close to the plate pulling device. The auxiliary tower is provided with a sixth guide wheel on the upper side of the fifth guide wheel. The first pull rope passes around the sixth guide wheel from the upper side, and then passes around the lower side of the fifth guide wheel, and is then connected to the plate pulling device.

[0011] The pull plate device includes a front pull plate, a rear pull plate and a connecting plate, the connecting plate is located between the front pull plate and the rear pull plate, the front pull plate and the rear pull plate are two pieces respectively, a first pulley and a second pulley are installed for rotation between the two front pull plates, a third pulley and a fourth pulley are installed for rotation between the two rear pull plates, the front pull plate and the rear pull plate on each side are clamped and connected to the two connecting plates through a connecting structure, the connecting structure includes a first pin shaft, a tensioning hole, a center hole, a second pin shaft and a positioning hole, one end of the two connecting plates is connected by a first pin The shaft is connected to the front pull plate, and a plurality of tensioning holes and positioning holes are provided on the connecting plate, and a plurality of center mounting holes are provided on the rear pull plate. The tensioning holes are long holes, and the second pin shaft passes through one pair of positioning holes and the center mounting holes to connect the connecting plate and the rear pull plate. A connecting seat is also installed on the rear pull plate, and the first tension rope is connected to the connecting seat after passing through the fourth pulley, the first pulley, the third pulley and the second pulley; the end of the front pull plate away from the connecting plate is connected to the auxiliary tower, and the end of the rear pull plate away from the connecting plate is installed with a connecting seat, and the connecting seat is also connected to the load-bearing cable.

[0012] The front pull plate is equipped with a tenth guide wheel on the side of the first pulley away from the connecting plate. The tenth guide wheel is used to guide the traction rope. The lower side of the front pull plate is also fixed with a mounting seat, and one end of the lifting rope is connected and fixed to the mounting seat.

[0013] An articulated seat is installed at one end of the front pull plate away from the connecting plate. The articulated seat is connected to the auxiliary tower through an articulated shaft. An articulated sleeve is installed between the articulated seat and the articulated shaft.

[0014] The utility model has the following beneficial effects:

[0015] 1. The utility model pulls down the slide by contracting the hydraulic cylinder, thereby achieving tensioning of the traction rope. The hydraulic cylinder can be a servo cylinder, which makes it easier to control the contraction length of the piston rod, thereby better controlling the tensioning force of the traction rope.

[0016] 2. The utility model facilitates tensioning of the load-bearing cables through the pull plate device. When tensioning or releasing the load-bearing cables, the first pull rope is connected to the pull plate device. During tensioning, the pull plate device always keeps the load-bearing cables in a movable connection with the main tower or auxiliary tower, improving safety when tensioning or releasing the load-bearing cables.

[0017] 3. When the load-bearing rope needs to be tensioned or loosened, the utility model inserts the second pin into the corresponding hole and the middle mounting hole without releasing the connection of the tensioning hole pin, and then releases the connection of the first tensioning hole pin. This can avoid the risk of the load-bearing rope falling off during the tensioning or loosening process. When the traction rope needs to be tensioned or loosened, the tensioning winch is first started to retract and release the second pull rope so as to maintain a good state of neither loose nor tight with the tensioning rope locking point. If the hydraulic cylinder fails and the second pull rope is needed to bear the load at the moment, if it is too loose, it will easily cause the impact force on the second pull rope to be too large and break. If it is too tight, if the winch needs to loosen the second pull rope, the winch may not have time to loosen the rope, causing the second pull rope to break or affecting the normal operation of the hydraulic cylinder. The design of the hydraulic cylinder and the second pull rope in this application plays a reliable role in the event of a hydraulic cylinder failure, avoiding the serious problem of the traction rope falling off. The clever use of the tensioning winch together with the load-bearing cable also demonstrates excellent economic efficiency and facilitates the rational arrangement of equipment in the narrow space of the main tower and auxiliary tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 This is a schematic diagram of the auxiliary tower structure of the utility model.

[0021] Figure 3 This is a schematic diagram of the main structure of the plate pulling device of the present invention.

[0022] Figure 4 This is a schematic diagram of the top structure of the plate pulling device of the present invention.

[0023] Figure 5 This is a schematic diagram of the arrangement of the first pull rope on the pull plate device of the utility model.

[0024] Figure 6 This is a schematic diagram of the connection between the second pull rope and the fixed shaft of the utility model.

[0025] Figure 7 It is a structural schematic diagram of the hoisting drum of the utility model.

[0026] In the picture:

[0027] Main tower 100, auxiliary tower 200, trolley 300;

[0028] Hoisting system 400, hoisting rope 410, seventh guide wheel 420, hoisting winch 430;

[0029] Traction system 500, traction rope 510, hydraulic cylinder 520, traction rope driving device 530, second guide wheel 540, sliding wheel 550, fixed shaft 551, slide 552, third guide wheel 560, eighth guide wheel 570, ninth guide wheel 580, slide 590;

[0030] Carrying system 600, articulated seat 601, articulated shaft 602, articulated sleeve 603, first pressure sensor 604, controller 605, transceiver 606, angle encoder 607, carrying cable 610, pull plate device 620, front pull plate 621, mounting seat 6211, rear pull plate 622, connecting plate 623, tenth guide wheel 624, first pulley 625, second pulley 626, third pulley 627, fourth pulley 628, connecting structure 629, first pin 6291, tensioning hole 6292, center mounting hole 6293, second pin 6294, positioning hole 6295;

[0031] Hook 700, pulley 710;

[0032] Tensioning system 800 , tensioning winch 810 , winch drum 811 , first rope groove 812 , second rope groove 813 , sixth guide wheel 820 , fifth guide wheel 830 , first tensioning rope 840 , fourth guide wheel 850 , second tensioning rope 860 . DETAILED DESCRIPTION

[0033] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0034] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0036] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0037] See also Figure 1-7 A cable crane includes a main tower 100 and a sub-tower 200. A lifting system 400, a traction system 500 and a carrying system 600 are installed on the main tower 100 and the sub-tower 200. A trolley 300 is installed on the carrying rope 610 of the carrying system 600. The traction system 500 tows the trolley 300 to move back and forth on the carrying rope 610 through the traction rope 510. The lifting rope 410 of the lifting system 400 passes around the trolley 300. The lifting rope 410 is located below the trolley 300 and is installed with a hook 700 through a movable pulley 710.

[0038] See also Figure 1-2 The auxiliary tower 200 is equipped with a tensioning wheel assembly for tensioning the traction rope 510. The tensioning wheel assembly includes a sliding wheel 550 and a slide 552. The sliding wheel 550 is rotatably mounted on the slide 552. The auxiliary tower 200 is also equipped with a slide 590. The slide 552 is slidably and adjustably mounted on the slide 590. The slide 552 is mounted on the slide 590 and connected to the slide 552. The hydraulic cylinder 520 is contracted to pull the slide 552 downward, thereby conveniently tensioning the traction rope 510. The hydraulic cylinder 520 can be a servo cylinder, which facilitates controlling the contraction length of the piston rod, thereby better controlling the tension of the traction rope 510.

[0039] See also Figure 1 、 2 The two ends of the load-bearing cable 610 are connected to the main tower 100 and the auxiliary tower 200 respectively. The end of the load-bearing cable 610 connected to the main tower 100 or the auxiliary tower 200 is installed with a pull plate device 620, which is then connected to the main tower 100 or the auxiliary tower 200. The pull plate device 620 facilitates the tensioning of the load-bearing cable 610.

[0040] Furthermore, it also includes a tensioning system 800, which includes a tensioning winch 810, a first tensioning rope 840 and a second tensioning rope 860. The first tensioning rope 840 and the second tensioning rope 860 are respectively wound and installed on the hoisting drum 811 of the tensioning winch 810. When the first tensioning rope 840 is connected to the pulling plate device 620, it is used to tension the load-bearing rope 610, and when the second tensioning rope 860 is connected to the tensioning wheel group, it is used to tension the traction rope 510.

[0041] When tensioning or loosening the load-bearing cable 610 is required, the first tensioning rope 840 is connected to the plate-pulling device 620. During tensioning, the plate-pulling device 620 always maintains a movable connection between the load-bearing cable 610 and the main tower 100 or the auxiliary tower 200, thereby improving safety during tensioning or loosening of the load-bearing cable 610. After the plate-pulling device 620 is tensioned by the first tensioning rope 840, the length of the load-bearing cable 610 can be adjusted using the plate-pulling device.

[0042] When it is necessary to tension or loosen the traction rope 510, the second tension rope 860 is connected to the tensioning wheel group. During tensioning, the tensioning winch 810 and the hydraulic cylinder 520 operate synchronously, and the second tension rope 860 and the tensioning wheel group maintain a buffer connection state. When the hydraulic cylinder 520 fails and loosens, the state of the traction rope 510 can also be guaranteed by the second tension rope 860, thereby improving the safety when tensioning or loosening the traction rope 510. After tensioning is completed, the slide 552 and the slide 590 are fixed by bolts.

[0043] See also Figure 1 、 2The auxiliary tower 200 is equipped with a traction rope drive device 530, a second guide wheel 540, and a third guide wheel 560. The second guide wheel 540 is located above the plate pulling device 620, the third guide wheel 560 is located above the second guide wheel 540, and the sliding wheel 550 is located below the second guide wheel 540. One end of the traction rope 510 is connected to the trolley 300, and the other end passes through the bottom of the tenth guide wheel 624 on the plate pulling device 620, then around the traction rope drive device 530, then around the top of the second guide wheel 540, then around the bottom of the sliding wheel 550, then around the top of the third guide wheel 560, then around the eighth guide wheel 570 on the upper side of the main tower 100, then around the ninth guide wheel 580 on the lower side, and finally through the trolley 300 to form a loop. Specifically, the sliding wheel 550 is rotatably mounted on the slide 552 via a fixed shaft 551. This structure drives the traction rope 510.

[0044] See also Figure 1 The tensioning system 800 also includes a fourth guide wheel 850, which is mounted on the auxiliary tower 200 and located below the pulley 550. The second tensioning rope 860 passes around the fourth guide wheel 850 from below and connects to the tensioning wheel assembly. The fourth guide wheel 850 redirects the second tensioning rope 860, aligning it perpendicularly with the pulley 550, facilitating downward pulling of the tensioning wheel assembly.

[0045] After the cable car has been running for a period of time, the length of the traction rope 510 may change due to stress or temperature. The traction rope 510 is very long, and this change may sometimes be large, affecting the normal and stable operation of the cable car, so a traction rope tensioning device needs to be set.

[0046] See also Figure 7 The tensioning winch 810 is equipped with a secondary rope groove, which houses a separate, shorter second tension rope 860. One end of the second tension rope 860 is wound through a fixed point within the winch's rope groove, passes through a fourth guide wheel 850 located at the bottom of the tensioning guide frame, and is securely locked to the tensioning rope locking points located at both ends of the fixed shaft 551 of the sliding wheel 550 using rope clamps or other means. Specifically, the hoisting drum 811 of the tensioning winch 810 is equipped with a first rope groove 812 and a second rope groove 813. The first rope groove 812 is used to wind and install the first tension rope 840, while the second rope groove 813 is used to wind and install the second tension rope 860.

[0047] When the traction rope 510 needs to be tensioned or loosened, the tensioning winch 810 is first activated to retract and release the second pull rope 860 so that it maintains a good state with the tensioning rope locking point, neither too loose nor too tight. If the hydraulic cylinder 520 fails and the second pull rope 860 is needed to bear the load, if it is too loose, it may easily cause the second pull rope 860 to break due to excessive impact force. If it is too tight, if the winch is needed to loosen the second pull rope 860, the winch may not be able to loosen the rope in time, causing the second pull rope 860 to break or affecting the normal operation of the hydraulic cylinder 520. The design of the hydraulic cylinder 520 and the second pull rope 860 in this application provides a reliable protection in the event of a hydraulic cylinder 520 failure, preventing the traction rope from slipping out. The clever sharing of the tensioning winch with the load-bearing cable 610 also reflects good economic efficiency and facilitates the reasonable arrangement of equipment in the confined space of the main tower and auxiliary tower.

[0048] See also Figure 6 The second tension rope 860 passes through the fourth guide wheel 850 from below and is connected to the fixed shaft 551. In one connection method, both ends of the fixed shaft 551 extend out of the slide 552. The portion of the fixed shaft 551 extending out of the slide 552 is provided with a groove. The two ends of the fixed shaft 551 are connected to the U-shaped rope through the groove, and the second tension rope 860 is connected to the U-shaped rope.

[0049] See also Figure 1 A fifth guide wheel 830 is mounted on the side of the sub-tower 200 connected to the load-bearing cable 610, near the plate pulling device 620. A sixth guide wheel 820 is mounted on the sub-tower 200 above the fifth guide wheel 830. The first pull rope 840 passes around the sixth guide wheel 820 from above, then around the bottom of the fifth guide wheel 830, and then connects to the plate pulling device 620. This structure guides the first pull rope 840, facilitating the pulling of the plate pulling device 620.

[0050] See also Figure 3 、 45. The pulling plate device 620 includes a front pulling plate 621, a rear pulling plate 622 and a connecting plate 623. The connecting plate 623 is located between the front pulling plate 621 and the rear pulling plate 622. The front pulling plate 621 and the rear pulling plate 622 are two pieces respectively. A first pulley 625 and a second pulley 626 are installed for rotation between the two front pulling plates 621. A third pulley 627 and a fourth pulley 628 are installed for rotation between the two rear pulling plates 622. The front pulling plate 621 and the rear pulling plate 622 on each side are clamped and connected to the two connecting plates 623 through a connecting structure 629. The connecting structure 629 includes a first pin shaft 6291, a tensioning hole 6292, a centering hole 6293, a second pin shaft 6294 and a positioning hole 6295. One end of the two connecting plates 623 is connected by the first pin shaft 6291. It is connected to the front pull plate 621, and a plurality of tensioning holes 6292 and positioning holes 6295 are provided on the connecting plate 623. A plurality of middle installation holes 6293 are provided on the rear pull plate 622. The tensioning hole 6292 is a long hole. The second pin shaft 6294 passes through one pair of positioning holes 6295 and the middle installation hole 6293 to connect the connecting plate 623 with the rear pull plate 622. A connecting seat 6221 is also installed on the rear pull plate 622. The first pull rope 840 passes through the fourth pulley 628, the first pulley 625, the third pulley 627 and the second pulley 626 and is connected to the connecting seat 6221; the end of the front pull plate 621 away from the connecting plate 623 is connected to the auxiliary tower 200, and the end of the rear pull plate 622 away from the connecting plate 623 is installed with a connecting seat, and the connecting seat 6221 is also connected to the load-bearing cable 610.

[0051] Through the above structure, when the load-bearing rope 610 needs to be tensioned or relaxed, the tensioning winch 810 is started to first tighten the first tension rope 840, release the second pin shaft 6294 connecting the connecting plate 623 and the rear pull plate 622, and replace the second pin shaft 6294 with the tensioning hole 6292 and the middle installation hole 6293. Because the tensioning hole 6292 is an oblong hole, the pin shaft of the connecting plate 623 and the rear pull plate 622 can be kept connected during the tensioning process. In this way, even if the first tension rope 840 is damaged or broken, the second pin shaft 6294 will still remain connected to ensure that the load-bearing rope 610 will not loosen. The first tensioning rope 840 is then tensioned using the tensioning winch 810, and the pin in the tensioning hole 6292 moves from one end of the tensioning hole 6292 to the other end, completing the tensioning process. At this point, without releasing the tensioning hole pin connection, the second pin is inserted into the aligned positioning hole 6295 and the center mounting hole 6293, and the connection between the pin in the first tensioning hole 6292 is released. This prevents the risk of the load-bearing rope 610 falling off during the tensioning or loosening process. After the load-bearing rope 610 is tensioned in place according to this procedure, the positioning hole 6295 and the center mounting hole 6293 are locked via the second pin 6294, ensuring the reliability and stability of the connection.

[0052] Furthermore, the front pull plate 621 is installed with a tenth guide wheel 624 on the side of the first pulley 625 away from the connecting plate 623. The tenth guide wheel 624 is used to guide the traction rope 510. The lower side of the front pull plate 621 is also fixed with a mounting seat 6211, and one end of the lifting rope 410 is connected and fixed to the mounting seat 6211.

[0053] For further information, see Figure 4 A hinged seat 601 is mounted on the end of the front pull plate 621 away from the connecting plate 623. This hinged seat 601 is connected to the auxiliary tower 200 via a hinge shaft 602. A hinged sleeve 603 is mounted between the hinged seat 601 and the hinge shaft 602. The pull plate assembly 620 is hingedly connected to the main tower and auxiliary tower, allowing the load-bearing cable 610 to swing up and down when stressed.

[0054] See also Figure 1 One end of the lifting rope 410 is connected to the auxiliary tower 200, or to the pulling plate device 620, and the other end of the lifting rope 410 passes around the seventh guide wheel 420 installed on the main tower 100, and then is connected to the lifting winch 430 installed on the main tower 100 to achieve the lifting of the hook 700.

[0055] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A cable crane, comprising a main tower (100) and a secondary tower (200), wherein a lifting system (400), a traction system (500) and a bearing system (600) are installed on the main tower (100) and the secondary tower (200), a trolley (300) is installed on the bearing rope (610) of the bearing system (600), the traction system (500) tows the trolley (300) to move back and forth on the bearing rope (610) through the traction rope (510), the lifting rope (410) of the lifting system (400) passes around the trolley (300), and the lifting rope (410) is installed with a hook (700) below the trolley (300) through a movable pulley (710), characterized in that: The auxiliary tower (200) is provided with a tensioning wheel assembly for tensioning the traction rope (510), the tensioning wheel assembly comprising a sliding wheel (550) and a sliding seat (552), the sliding wheel (550) being rotatably mounted on the sliding seat (552), the auxiliary tower (200) being further provided with a slide (590), the sliding seat (552) being slidably and adjustably mounted on the slide (590), the slide (590) being provided with a hydraulic cylinder (520), the hydraulic cylinder (520) being connected to the slide (552).

2. A cable crane according to claim 1, characterized in that: Both ends of the load-bearing cable (610) are connected to the main tower (100) and the auxiliary tower (200), respectively. A plate pulling device (620) is installed at one end of the load-bearing cable (610) connected to the auxiliary tower (200), and the plate pulling device (620) is further connected to the auxiliary tower (200).

3. A cable crane according to claim 2, characterized in that: The invention also includes a tensioning system (800), wherein the tensioning system (800) includes a tensioning winch (810), a first tensioning rope (840) and a second tensioning rope (860), wherein the first tensioning rope (840) and the second tensioning rope (860) are respectively wound and installed on a hoisting drum (811) of the tensioning winch (810), and the first tensioning rope (840) is used to tension the load-bearing rope (610) when connected to the pulling plate device (620), and the second tensioning rope (860) is used to tension the traction rope (510) when connected to the tensioning wheel assembly.

4. A cable crane according to claim 3, characterized in that: The auxiliary tower (200) is equipped with a traction rope driving device (530), a second guide wheel (540) and a third guide wheel (560). The second guide wheel (540) is located on the upper side of the plate pulling device (620), the third guide wheel (560) is located on the upper side of the second guide wheel (540), and the sliding wheel (550) is located on the lower side of the second guide wheel (540). The traction rope (510) passes around the lower side of the tenth guide wheel (624) on the plate pulling device (620), and then passes around the traction rope driving device (530). Then, it passes around from above the second guide wheel (540), then passes around from the lower side of the sliding wheel (550), and finally passes around from the upper side of the third guide wheel (560). The sliding wheel (550) is rotatably mounted on the slide seat (552) via a fixed shaft (551).

5. A cable crane according to claim 3, characterized in that: The tensioning system (800) further includes a fourth guide wheel (850), which is mounted on the auxiliary tower (200) and located below the sliding wheel (550). The second tensioning rope (860) passes around the fourth guide wheel (850) from below and is connected to the tensioning wheel assembly.

6. A cable crane according to claim 5, characterized in that: The second pull rope (860) passes around the fourth guide wheel (850) from below and is connected to the fixed shaft (551).

7. A cable crane according to claim 3, characterized in that: The auxiliary tower (200) is provided with a fifth guide wheel (830) on the side connected to the load-bearing rope (610) and at a position close to the plate pulling device (620). A sixth guide wheel (820) is provided on the auxiliary tower (200) above the fifth guide wheel (830). The first pull rope (840) passes around the sixth guide wheel (820) from the upper side and then passes around the lower side of the fifth guide wheel (830) before being connected to the plate pulling device (620).

8. A cable crane according to claim 3, characterized in that: The pulling plate device (620) includes a front pulling plate (621), a rear pulling plate (622) and a connecting plate (623). The connecting plate (623) is located between the front pulling plate (621) and the rear pulling plate (622). The front pulling plate (621) and the rear pulling plate (622) are two pieces. A first pulley (625) and a second pulley (626) are installed for rotation between the two front pulling plates (621). A third pulley (625) and a second pulley (626) are installed for rotation between the two rear pulling plates (622). The front pull plate (621) and the rear pull plate (622) on each side are clamped and connected with the two connecting plates (623) through a connecting structure (629). The connecting structure (629) includes a first pin shaft (6291), a tensioning hole (6292), a center hole (6293), a second pin shaft (6294) and a positioning hole (6295). One end of the two connecting plates (623) is connected to the first pin shaft (6291). The front pull plate (621) is connected, a plurality of tensioning holes (6292) and positioning holes (6295) are provided on the connecting plate (623), and a plurality of middle mounting holes (6293) are provided on the rear pull plate (622). The tensioning hole (6292) is a long hole. The second pin shaft (6294) penetrates into one of the pair of positioning holes (6295) and the middle mounting hole (6293) to connect the connecting plate (623) and the rear pull plate (622). A connecting seat ( 6221), the first pull rope (840) is connected to the connecting seat (6221) after passing through the fourth pulley (628), the first pulley (625), the third pulley (627) and the second pulley (626); the end of the front pull plate (621) away from the connecting plate (623) is connected to the auxiliary tower (200), and the end of the rear pull plate (622) away from the connecting plate (623) is installed with a connecting seat, and the connecting seat (6221) is also connected to the load-bearing rope (610).

9. A cable crane according to claim 8, characterized in that: The front pull plate (621) is provided with a tenth guide wheel (624) on the side of the first pulley (625) away from the connecting plate (623). The tenth guide wheel (624) is used to guide the traction rope (510). A mounting seat (6211) is also fixed to the lower side of the front pull plate (621), and one end of the lifting rope (410) is connected and fixed to the mounting seat (6211).

10. A cable crane according to claim 8 or 9, characterized in that: An articulated seat (601) is installed at one end of the front pull plate (621) away from the connecting plate (623). The articulated seat (601) is connected to the auxiliary tower (200) via an articulated shaft (602). An articulated sleeve (603) is installed between the articulated seat (601) and the articulated shaft (602).

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