Shore crane

Abstract

The invention provides a quay crane which comprises a door frame, a rear girder, a front girder, a seaside trapezoid frame, a first stretching part, a supporting frame and a second stretching part, the seaside trapezoid frame is located on the side, close to the front girder, of the rear girder, the lower end of the seaside trapezoid frame is hinged to the rear girder, and the first end of the first stretching part is hinged to the seaside trapezoid frame; when the seaside trapezoid frame is in a vertical state, the front girder is pulled by the first stretching part, the supporting frame is vertically arranged on the side, close to the front girder, of the rear girder, the first end of the second stretching part is connected to the supporting frame, and the second end of the second stretching part is connected to the front girder. And the front crossbeam is pulled by the second stretching part. According to the quay crane, the second stretching part can independently provide pulling force for the front girder, a supporting tool does not need to be arranged between the bottom of the front girder and the door frame, the working procedure during quay crane transportation is simplified, the supporting tool is omitted, and the cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of port machinery, and in particular to a quay crane. Background Art

[0002] A quay crane, also known as a shore container crane, is a specialized equipment used specifically for loading and unloading container ships at container terminals.

[0003] See also Figure 1 The quay crane may generally include a door frame 10, a front beam 20, a rear beam 30, a ladder frame 40, a stretching portion 50, etc. The ladder frame 40 is erected on the door frame 10, one end of the stretching portion 50 is hinged to the ladder frame 40, and the other end is hinged to the front beam 20 to provide an upward pulling force for the suspended front beam 20.

[0004] When transporting the quay crane by transport ship, it is often necessary to cross high-altitude obstacles such as sea-crossing bridges or cross-river cables, and after the transport ship arrives at the port, in order not to affect the berthing of other ships, the front beam 20 needs to be raised.

[0005] In the prior art, in order to solve the problem of avoiding high-altitude obstacles, the ladder frame 40 is tilted toward the sea side to lower the navigation height. However, since the ladder frame 40 is used to connect the stretching part 50, if the ladder frame 40 tilts toward the sea side, the stretching part 50 can no longer provide an upward pulling force to the front beam 20. Therefore, it is necessary to set a supporting tooling 60 between the bottom of the front beam 20 and the door frame 10 to support the front beam 20.

[0006] However, when the transport ship arrives at the port, it is necessary to use a floating crane to dismantle the support fixture 60 to release the freedom of the front beam 20 to rotate upward. Therefore, the prior art has a series of problems such as cumbersome transportation process, difficulty in disassembling the support fixture 60, and high cost, which need to be further improved. Summary of the invention

[0007] The present application provides a quay crane. When the sea-side ladder frame is in a tilted state toward the front beam, there is no need to set additional supporting tooling between the bottom of the front beam and the door frame for supporting the front beam. When the transport ship transporting the quay crane arrives at the port terminal and needs to raise the front beam, there is no need to dismantle the supporting tooling. This not only simplifies the process of transporting the quay crane, but also saves the giant supporting tooling and reduces the cost.

[0008] In order to achieve the above objectives, this application adopts the following technical solutions:

[0009] The present application provides a quay crane, which comprises: a door frame; a rear beam, wherein the rear beam is fixed to the door frame;

[0010] A front beam, the front beam is arranged on one side of the door frame and is hinged to the rear beam; a sea side ladder frame, the sea side ladder frame is located on the side of the rear beam close to the front beam, and the lower end is hinged to the door frame, and has an upright state and a tilted state tilted toward the front beam; a first stretching portion, a first end of the first stretching portion is hinged to the sea side ladder frame, and a second end of the first stretching portion is hinged to the front beam, and when the sea side ladder frame is in the upright state, the first stretching portion is used to pull the front beam; a supporting frame, the supporting frame is uprightly arranged on the side of the rear beam close to the front beam; a second stretching portion, a first end of the second stretching portion is connected to the supporting frame, and a second end of the second stretching portion is connected to the front beam, and the second stretching portion is used to pull the front beam.

[0011] As an optional embodiment, the rear beam includes two rear beam rods extending in parallel and a front cross beam connected between the two rear beam rods; the bottom end of the sea side ladder frame is hinged to the front cross beam; and the support frame is arranged inside the sea side ladder frame, and the bottom end of the support frame is fixed to the front cross beam.

[0012] As an optional implementation, there are two support frames, and the two support frames are arranged at an interval; there are two second stretching parts, the two second stretching parts correspond to the two support frames one by one, and the first ends of the two second stretching parts are respectively connected to the two support frames.

[0013] As an optional embodiment, the first stretching part includes: multiple first pull rods and at least one first adapter, two adjacent first pull rods are connected by a first adapter, and the first pull rod at the head end is hinged to the sea side ladder frame, and the first pull rod at the end is hinged to the front beam; when the sea side ladder frame is in an upright state, the multiple first pull rods are in the same straight line; when the sea side ladder frame rotates from the upright state to the tilted state, at least part of the first pull rods rotate relative to the first adapter to fold the first stretching part; when the front beam is tilted upward, at least part of the first pull rods rotate relative to the first adapter to fold the first stretching part.

[0014] As an optional embodiment, the second stretching part includes: multiple second pull rods and at least one second adapter, two adjacent second pull rods are connected by a second adapter, and the second pull rod at the head end is hinged to the support frame, and the first pull rod at the tail end is hinged to the front beam; when the sea side ladder frame is in an upright state or a tilted state, the multiple second pull rods are in the same straight line; when the front beam is tilted upward, at least part of the second pull rods rotate relative to the second adapter to fold the second stretching part.

[0015] As an optional embodiment, the quay crane also includes: a land-side ladder frame, which is arranged on the rear beam and is located on the side of the sea-side ladder frame away from the front beam; a connecting rod, a first end of the connecting rod is connected to the land-side ladder frame, and a second end of the connecting rod is connected to the support frame.

[0016] As an optional embodiment, the quay crane also includes: a rear pull rod, which is located on the side of the land side ladder frame away from the sea side ladder frame, the first end of the rear pull rod is hinged to the rear beam, and the second end of the rear pull rod is hinged to the land side ladder frame to pull the land side ladder frame.

[0017] As an optional embodiment, the quay crane also includes: a first pulley group, the first pulley group is arranged on the sea side ladder frame; a second pulley group, the second pulley group is arranged on the land side ladder frame; a laying down and winding system, the laying down and winding system includes a driving unit and a steel wire rope, the steel wire rope is wound around the second pulley group and the first pulley group, and the steel wire rope is connected to the driving unit, and the driving unit is configured to drive the sea side ladder frame to switch between an upright state and a tilted state by retracting and releasing the steel wire rope.

[0018] As an optional embodiment, the quay crane also includes: a rear support rod, which is located on the side of the sea side ladder frame away from the front beam, and the first end of the rear support rod is detachably connected to the rear beam, and the second end of the rear support rod is connected to the sea side ladder frame to pull the sea side ladder frame.

[0019] As an optional embodiment, the quay crane further includes: a slide rail, which is arranged on the rear beam; when the sea side ladder frame rotates from an upright state to a tilted state, the first end of the rear support rod can be slidably arranged on the slide rail.

[0020] In the quay crane of the present application, the rear beam is fixed to the door frame, the front beam is arranged on one side of the door frame and is hinged to the rear beam, the sea-side ladder frame is located on the side of the rear beam close to the front beam, and the lower end is hinged to the rear beam, and has an upright state and a tilted state tilted toward the front beam. The first end of the first stretching part is hinged to the sea-side ladder frame, and the second end of the first stretching part is hinged to the front beam. When the sea-side ladder frame is in the upright state, the first stretching part is used to pull the front beam. The support frame is uprightly arranged on the side of the rear beam close to the front beam, the first end of the second stretching part is connected to the support frame, and the second end of the second stretching part is connected to the front beam. When the sea-side ladder frame is in the upright state or the tilted state, the second stretching part is used to pull the front beam. When it is necessary to avoid high-altitude obstacles, the sea-side ladder frame is in a tilted state toward the front beam, and the sea-side ladder frame also loses the ability to provide pulling force for the front beam. In this state, the second stretching part can provide pulling force for the front beam alone, and there is no need to set additional supporting tooling between the bottom of the front beam and the door frame to support the front beam. When the transport ship transporting the quay crane arrives at the port terminal and needs to lift up the front beam, there is no need to dismantle the supporting tooling, which not only simplifies the process of transporting the quay crane, but also saves the giant supporting tooling and reduces the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A schematic diagram of a quay crane in the prior art;

[0023] Figure 2 A schematic diagram of a quay crane in a normal state provided for one embodiment of the present application;

[0024] Figure 3 A schematic diagram of a quay crane when a sea-side ladder frame is in a tilted state provided in one embodiment of the present application;

[0025] Figure 4 A schematic diagram of a quay crane when the front beam is in an uplifted state provided in one embodiment of the present application;

[0026] Figure 5 for Figure 2 Left view of

[0027] Figure 6 for Figure 2 Right view of .

[0028] Description of reference numerals:

[0029] 100, door frame; 110, rear beam; 112, rear cross beam; 114, front cross beam; 116, rear beam rod; 120, front beam; 200, sea side ladder frame; 210, cross bar; 220, waist bar; 300, first stretching part; 310, first pull rod; 320, first adapter; 400, support frame; 500, second stretching part; 510, second pull rod; 520, second adapter; 600, land side ladder frame; 610, connecting rod; 620, slide rail; 700, rear pull rod; 810, first pulley block; 820, second pulley block; 830, wire rope; 900, rear support rod. DETAILED DESCRIPTION

[0030] See also Figure 1 In the process of transporting the quay crane by using a transport ship, in order to solve the problem of avoiding high-altitude obstacles, the ladder frame 40 is tilted toward the sea side to lower the navigation height. However, since the ladder frame 40 is used to connect the stretching part 50, if the ladder frame 40 tilts toward the sea side, the stretching part 50 can no longer provide an upward pulling force to the front beam 20. Therefore, it is necessary to set a supporting tooling 60 between the bottom of the front beam 20 and the door frame 10 to support the front beam 20.

[0031] However, when the transport ship arrives at the port, when the front beam 20 needs to be raised, the support fixture 60 needs to be disassembled to release the freedom of the front beam 20 to rotate upward. Therefore, the prior art has a series of problems such as cumbersome transportation process, difficulty in disassembling the support fixture 60, and high cost, which need to be further improved.

[0032] In order to overcome the defects in the prior art, the present application provides a quay crane, wherein the rear beam is fixed to the door frame, the front beam is arranged on one side of the door frame and is hinged to the rear beam, the sea-side ladder frame is located on the side of the rear beam close to the front beam, and the lower end is hinged to the rear beam, and has an upright state and a tilted state tilted toward the front beam. The first end of the first stretching portion is hinged to the sea-side ladder frame, and the second end of the first stretching portion is hinged to the front beam. When the sea-side ladder frame is in the upright state, the first stretching portion is used to pull the front beam, the support frame is uprightly arranged on the side of the rear beam close to the front beam, the first end of the second stretching portion is connected to the support frame, and the second end of the second stretching portion is connected to the front beam. When the sea-side ladder frame is in the upright state or the tilted state, the second stretching portion is used to pull the front beam. When it is necessary to avoid high-altitude obstacles, the sea-side ladder frame is in a tilted state toward the front beam, and the sea-side ladder frame also loses the ability to provide pulling force for the front beam. In this state, the second stretching part can provide pulling force for the front beam alone, and there is no need to set additional supporting tooling between the bottom of the front beam and the door frame to support the front beam. When the transport ship transporting the quay crane arrives at the port terminal and needs to lift up the front beam, there is no need to dismantle the supporting tooling, which not only simplifies the process of transporting the quay crane, but also saves the giant supporting tooling and reduces the cost.

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the embodiments of the present application. Figures 2 to 6 , the technical solutions in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0034] The present application provides a quay bridge, which generally may include a door frame 100, a rear beam 110 and a front beam 120, wherein the rear beam 110 is fixed to the door frame 100. The front beam 120 is disposed on one side of the door frame 100 and is hinged to the rear beam 110.

[0035] The door frame 100 supports the entire quay crane. The rear beam 110 is horizontally fixed to the door frame 100, and the front beam 120 is hinged to the rear beam 110. The front beam 120 can be rotated to a horizontal posture and horizontally connected with the rear beam 110, and the two form a main beam supporting the container hoisting trolley to travel.

[0036] In some embodiments, the quay crane may further include a sea-side ladder frame 200 and a first stretching part 300. The sea-side ladder frame 200 is located on a side of the rear beam 110 close to the front beam 120, and the lower end is hinged to the door frame 100, and has an upright state and a tilted state tilted toward the front beam 120. The first end of the first stretching part 300 is hinged to the sea-side ladder frame 200, and the second end of the first stretching part 300 is hinged to the front beam 120. When the sea-side ladder frame 200 is in the upright state, the first stretching part 300 is used to pull the front beam 120.

[0037] In this embodiment, the door frame 100 has a sea side cross beam, and both bottom ends of the sea side ladder frame 200 are hinged to the sea side cross beam. The sea side ladder frame 200 can rotate between an upright state and a tilted state tilted toward the front beam 120 under the drive of an external force.

[0038] When the sea-side ladder frame 200 is in an upright state, since the first end of the first stretching part 300 is connected to the sea-side ladder frame 200, and the second end of the first stretching part 300 is connected to the front beam 120, the sea-side ladder frame 200, the front beam 120 and the first stretching part 300 form a stable force relationship, and the first stretching part 300 can pull the front beam 120 upward to make the front beam 120 in a horizontal state.

[0039] When transporting the quay crane by transport ship, it is often necessary to pass through high-altitude obstacles such as sea-crossing bridges or cross-river cables. In this embodiment, the sea-side ladder frame 200 can be tilted toward the sea side to reduce the navigation height, so that the transport ship can pass through the high-altitude obstacles smoothly.

[0040] In some embodiments, the quay crane may further include a support frame 400 and a second stretching portion 500. The support frame 400 is vertically arranged on one side of the rear beam 110 close to the front beam 120. The first end of the second stretching portion 500 is connected to the support frame 400, and the second end of the second stretching portion 500 is connected to the front beam 120, and the front beam 120 is pulled by the second stretching portion 500.

[0041] In this embodiment, the support frame 400 and the second tensioning part 500 also form a pulling system for the front beam 120. When the sea-side ladder frame 200 is in an upright state, the first tensioning part 300 and the second tensioning part 500 jointly provide the front beam 120 with a pulling force in a horizontal state.

[0042] When it is necessary to avoid high-altitude obstacles, when the sea-side ladder frame 200 is in a tilted state toward the front beam 120, the sea-side ladder frame 200 also loses the ability to provide pulling force for the front beam 120. In this state, the second tensioning part 500 can provide pulling force for the front beam 120 alone to make it in a horizontal state.

[0043] That is to say, the quay crane of this embodiment, by adding an independent pulling system formed by the support frame 400 and the second stretching part 500, can provide pulling force for the front beam 120 when the first stretching part 300 is in a tilted state. There is no need to set additional supporting tooling for supporting the front beam 120 between the bottom of the front beam 120 and the door frame 100. When the transport ship transporting the quay crane arrives at the port terminal and needs to lift up the front beam 120, there is no need to disassemble the supporting tooling. This not only simplifies the process of transporting the quay crane, but also eliminates the need for giant supporting tooling and reduces costs.

[0044] In some embodiments, the rear beam 110 includes two rear beam rods 116 extending in parallel and a front cross beam 114 connected between the two rear beam rods 116. The bottom end of the sea side ladder frame 200 is hinged to the front cross beam 114.

[0045] Specifically, the sea side ladder frame 200 may include a cross bar 210 and two waist bars 220 , the bottom ends of the two waist bars 220 are hinged to the two rear beams 116 , the cross bar 210 is connected between the top ends of the two waist bars 220 , and the first end of the first stretching part 300 is hinged to the cross bar 220 .

[0046] Furthermore, there are two first stretching parts 300, the first ends of the two first stretching parts 300 are hinged to the cross bar 210, and the second ends of the two first stretching parts 300 are connected to the front beam 120. The two first stretching parts 300 pull the front beam 120 at the same time, improving the balance of left and right forces.

[0047] In some embodiments, the support frame 400 is disposed inside the sea-side ladder frame 200 , and the bottom end of the support frame 400 is fixed to the front crossbeam 114 .

[0048] Specifically, the support frame 400 can also be designed as a triangle, which increases the stability of the support frame 400. The two bottom ends of the support frame 400 can be fixed on the front crossbeam 114 respectively, and the first end of the second stretching portion 500 is connected to the upper end of the support frame 400.

[0049] In this embodiment, since the support frame 400 is arranged inside the sea side ladder frame 200, the height and width of the support frame 400 are smaller than the height and width of the sea side ladder frame 200. In this way, when the sea side ladder frame 200 rotates between the upright state and the tilted state, the support frame 400 will not interfere with the sea side ladder frame 200.

[0050] In some embodiments, there are two support frames 400 , and the two support frames 400 are arranged at an interval. There are two second stretching parts 500 , and the first ends of the two second stretching parts 500 are connected to the two support frames 400 , respectively.

[0051] In this embodiment, the two first stretching parts 300 pull the front beam 120 at the same time, thereby improving the balance of the left and right forces on the front beam 120 .

[0052] In addition, the two support frames 400 are spaced apart without a crossbeam therebetween, that is, the gap therebetween allows other components that rotate with the sea-side ladder frame 200 to pass through without interfering with the sea-side ladder frame 200 .

[0053] In some exemplary embodiments, the quay crane may further include a rear support rod 900, which is located on the side of the sea side ladder frame 200 away from the front beam 120, and the first end of the rear support rod 900 is connected to the rear beam 110, and the second end of the rear support rod 900 is connected to the sea side ladder frame 200 to pull the sea side ladder frame 200.

[0054] When the sea-side ladder frame 200 rotates from the erect state to the tilted state, the first end of the rear support rod 900 is removed from the rear beam 110 to release the rotational freedom of the sea-side ladder frame 200. When the sea-side ladder frame 200 rotates from the erect state to the tilted state, the rear support rod 900 also rotates toward the sea side. Since the two support frames 400 are arranged at an interval, the gap between the two can allow the rear support rod 900 to pass through without affecting the rotation of the sea-side ladder frame 200.

[0055] In some embodiments, the first stretching portion 300 includes multiple first pull rods 310 and at least one first adapter 320, two adjacent first pull rods 310 are connected in sequence through a first adapter 320, and the first pull rod 310 at the head end is hinged to the sea side ladder frame 200, and the first pull rod 310 at the end is hinged to the front beam 120.

[0056] When the sea-side ladder frame 200 is in an erected state, the plurality of first tie rods 310 are in the same straight line. When the sea-side ladder frame 200 rotates from the erected state to the tilted state, at least some of the first tie rods 310 rotate relative to the first adapter 320 to fold the first stretching portion 300. When the front beam 120 is tilted upward, at least some of the first tie rods 310 rotate relative to the first adapter 320 to fold the first stretching portion 300.

[0057] In this embodiment, when the sea-side ladder frame 200 is in an upright state, multiple first pull rods 310 are in the same straight line, that is, in a stretched state, so that the sea-side ladder frame 200, the front beam 120 and the first tensioning part 300 form a stable triangular support, and the first tensioning part 300 provides tension for the front beam 120.

[0058] When the sea-side ladder frame 200 tilts toward the front beam 120, at least part of the first pull rod 310 rotates relative to the first adapter 320 to fold the first stretching part 300, thereby releasing the stable triangular support formed by the sea-side ladder frame 200, the front beam 120 and the first stretching part 300, and releasing the freedom of the sea-side ladder frame 200 to tilt toward the front beam 120.

[0059] When the front beam 120 tilts upward, at least part of the first pull rod 310 rotates relative to the first adapter 320, releasing the stable triangular support formed by the sea-side ladder frame 200, the front beam 120 and the first tensioning part 300, thereby releasing the freedom of the front beam 120 to tilt upward.

[0060] In some specific embodiments, three first pull rods 310 are provided, and two first adapters 320 are provided. One first adapter 320 is connected between two adjacent first pull rods 310 .

[0061] When the sea-side ladder frame 200 rotates from the erected state to the tilted state, the first pull rod 310 close to the sea-side ladder frame 200 rotates relative to the first adapter 320 to fold the first stretching portion 300 .

[0062] When the front beam 120 is tilted upward, the first pull rod 310 close to the front beam 120 rotates relative to the first adapter 320 to fold the first stretching portion 300 .

[0063] In some embodiments, the second stretching portion 500 may include a plurality of second tie rods 510 and at least one second adapter 520, two adjacent second tie rods 510 are connected by a second adapter 520, and the second tie rod 510 at the head end is hinged to the support frame 400, and the first tie rod 310 at the end is hinged to the front beam 120. When the sea-side ladder frame 200 is in an upright state or a tilted state, the plurality of second tie rods 510 are in the same straight line. When the front beam 120 is tilted upward, at least part of the second tie rods 510 rotate relative to the second adapter 520 to fold the second stretching portion 500.

[0064] In this embodiment, when the sea side ladder frame 200 is in an upright state, multiple second pull rods 510 are in the same straight line, that is, in a stretched state, so that the support frame 400, the front beam 120 and the second stretching part 500 form a stable triangular support, and the second stretching part 500 and the first stretching part 300 jointly provide tension for the front beam 120.

[0065] When the sea-side ladder frame 200 is in a tilted state, the multiple second pull rods 510 are still in the same straight line, so that the support frame 400, the front beam 120 and the second tensioning part 500 form a stable triangular support, and the second tensioning part 500 alone provides tension for the front beam 120.

[0066] When the front beam 120 tilts upward, at least part of the second pull rod 510 rotates relative to the second adapter 520 to fold the second stretching portion 500, thereby releasing the stable triangular support formed by the support frame 400, the front beam 120 and the second stretching portion 500, and releasing the freedom of the front beam 120 to tilt upward.

[0067] In some specific embodiments, there are two second pull rods 510 , and a second adapter 520 is disposed between the two second pull rods 510 .

[0068] In some embodiments, the quay crane may further include a land-side ladder frame 600 and a connecting rod 610. The land-side ladder frame 600 is disposed on the rear beam 110, and is located on the side of the sea-side ladder frame 200 away from the front beam 120. The first end of the connecting rod 610 is connected to the land-side ladder frame 600, and the second end of the connecting rod 610 is connected to the support frame 400.

[0069] In this embodiment, the rear beam 110 may further include a rear cross beam 112 connected between two rear beam rods 116 , and two bottom ends of the land-side ladder frame 600 are respectively fixed to the rear cross beam 112 .

[0070] In this embodiment, the land-side ladder frame 600 can be fixed to the rear beam 110 , and the supporting frame 400 can be pulled backward by the connecting rod 610 fixed to the land-side ladder frame 600 to keep it stable.

[0071] Furthermore, the quay crane may also include a rear tie rod 700, which is located on the side of the land-side ladder frame 600 away from the sea-side ladder frame 200, the first end of the rear tie rod 700 is hinged to the rear beam 110, and the second end of the rear tie rod 700 is hinged to the land-side ladder frame 600 to pull the land-side ladder frame 600.

[0072] In this embodiment, the first end of the rear tie rod 700 is hinged to the rear beam 110, and the second end of the rear tie rod 700 is hinged to the land-side ladder frame 600, so that the rear tie rod 700, the land-side ladder frame 600 and the rear beam 110 form a stable force triangle, thereby keeping the land-side ladder frame 600 stable.

[0073] In some embodiments, the quay crane may further include a first pulley block 810, a second pulley block 820, and a laying down winding system. The first pulley block 810 is disposed on the sea-side ladder frame 200. The second pulley block 820 is disposed on the land-side ladder frame 600. The laying down winding system includes a driving unit and a steel wire rope 830, the steel wire rope 830 is wound around the first pulley block 810 and the second pulley block 820, and the steel wire rope 830 is connected to the driving unit, and the driving unit is configured to drive the sea-side ladder frame 200 to switch between the erected state and the dumped state by retracting and releasing the steel wire rope 830.

[0074] In this embodiment, the first pulley block 810 is arranged on the sea-side ladder frame 200, and the second pulley block 820 is arranged on the land-side ladder frame 600. The first end of the wire rope 830 is fixed to the driving unit, and then it is sequentially wound around the second pulley block 820 on the land-side ladder frame 600 and the first pulley block 810 on the sea-side ladder frame 200, and finally it is turned back and connected to the land-side ladder frame 600. When the driving unit releases the wire rope 830, the tension of the wire rope 830 on the sea-side ladder frame 200 is reduced, and the sea-side ladder frame 200 can be rotated from the upright state to the tilted state. When the driving unit tightens the wire rope 830, the tension of the wire rope 830 on the sea-side ladder frame 200 is increased, and the sea-side ladder frame 200 can be rotated from the tilted state to the upright state.

[0075] In some specific embodiments, the driving part may be a winch, which may be fixed to the ground or the door frame 100. The first end of the wire rope 830 is fixed to the drum of the winch, and the drum of the winch retracts and releases the wire rope 830 by rotating forward and reverse to control the tension of the wire rope 830.

[0076] In some embodiments, the quay crane may further include a rear support rod 900, which is located on the side of the sea side ladder frame 200 away from the front beam 120, and the first end of the rear support rod 900 is detachably connected to the rear beam 110, and the second end of the rear support rod 900 is connected to the sea side ladder frame 200 to pull the sea side ladder frame 200.

[0077] In some specific embodiments, the first end of the rear support rod 900 and the rear beam 110 may be connected by a pin, which facilitates the disassembly of the rear support rod 900 .

[0078] In this embodiment, the first end of the rear support rod 900 is detachably connected to the rear beam 110, and the second end of the rear support rod 900 is connected to the sea-side ladder frame 200, so that the rear support rod 900, the rear beam 110 and the sea-side ladder frame 200 form a stable force triangle, thereby keeping the sea-side ladder frame 200 stable.

[0079] When the sea-side ladder frame 200 rotates from the upright state to the tilted state, the first end of the rear support rod 900 can be removed from the rear beam 110 to release the rotational freedom of the sea-side ladder frame 200 .

[0080] During the rotation of the sea-side ladder frame 200 , the rear support rod 900 also rotates accordingly. Since the two support frames 400 are arranged at an interval, the gap between the two can allow the rear support rod 900 to pass through without affecting the rotation of the sea-side ladder frame 200 .

[0081] Furthermore, the quay crane may further include a slide rail 620 , which is disposed on the rear beam 110 . When the sea-side ladder frame 200 rotates from the erect state to the tilted state, the first end of the rear support rod 900 may be slidably disposed on the slide rail 620 .

[0082] As can be seen from the above, the rear support rod 900 constrains the rotation of the sea-side ladder frame 200 after installation. In order to release the rotational freedom of the sea-side ladder frame 200, the first end of the rear support rod 900 needs to be removed from the rear beam 110. However, if the removed rear support rod 900 is not restricted, it will cause safety hazards.

[0083] In this embodiment, when the sea-side ladder frame 200 rotates from an upright state to a tilted state, the first end of the removed rear support rod 900 is set in the slide rail 620 so that it slides in the slide rail 620 as the sea-side ladder frame 200 rotates, thereby ensuring the safety of the rear support rod 900.

[0084] In some embodiments, the rear beam 110 may further include a rear cross beam 112, a front cross beam 114, and two rear beam rods 116, the two rear beam rods 116 extend in parallel, the rear cross beam 112 is connected between the two rear beam rods 116, and the front cross beam 114 is connected between the two rear beam rods 116. The land side ladder frame 600 is connected to the rear cross beam 112. The sea side ladder frame 200 is hinged to the front cross beam 114. The support frame 400 is connected to the front cross beam 114.

[0085] It should be noted that the phrases "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include certain features, structures or characteristics, but not every embodiment may include the certain features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing certain features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.

[0086] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0087] It should be easily understood that the terms “on,” “above,” and “over” in this application should be interpreted in the broadest manner, so that “on” means not only “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above something” or “over,” but also may include the meaning of “above something” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0088] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90° or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A quay crane, comprising: Door frame (100); A rear beam (110), wherein the rear beam (110) is fixed to the door frame (100); A front beam (120), the front beam (120) being arranged on one side of the door frame (100) and being hinged to the rear beam (110); A sea-side ladder frame (200), the sea-side ladder frame (200) is located on a side of the rear beam (110) close to the front beam (120), and the lower end is hinged to the door frame (100), and has an upright state and a tilted state tilted toward the front beam (120); a first stretching part (300), wherein a first end of the first stretching part (300) is hinged to the sea-side ladder frame (200), and a second end of the first stretching part (300) is hinged to the front beam (120); when the sea-side ladder frame (200) is in the erected state, the first stretching part (300) is used to pull the front beam (120); A support frame (400), the support frame (400) being vertically arranged on a side of the rear beam (110) close to the front beam (120); A second stretching part (500), wherein a first end of the second stretching part (500) is connected to the support frame (400), and a second end of the second stretching part (500) is connected to the front beam (120), and the front beam (120) is pulled by the second stretching part (500).

2. The quay crane according to claim 1, wherein: The rear beam (110) comprises two rear beam rods (116) extending in parallel and a front cross beam (114) connected between the two rear beam rods (116); The bottom end of the sea side ladder frame (200) is hinged to the front crossbeam (114); and, The support frame (400) is arranged inside the sea side ladder frame (200), and the bottom end of the support frame (400) is fixed to the front crossbeam (114).

3. The quay crane according to claim 1, wherein: There are two support frames (400), and the two support frames (400) are arranged at an interval; There are two second stretching parts (500), the two second stretching parts (500) correspond to the two support frames (400) one by one, and the first ends of the two second stretching parts (500) are respectively connected to the two support frames (400).

4. The quay crane according to claim 1, wherein: The first stretching part (300) comprises: a plurality of first pull rods (310) and at least one first adapter (320), two adjacent first pull rods (310) are connected via one first adapter (320), and the first pull rod (310) at the head end is hinged to the sea side ladder frame (200), and the first pull rod (310) at the tail end is hinged to the front beam (120); When the sea-side ladder frame (200) is in the erected state, the plurality of first tie rods (310) are in the same straight line; When the sea-side ladder frame (200) rotates from the erected state to the tilted state, at least a portion of the first pull rod (310) rotates relative to the first adapter (320) to fold the first stretching portion (300); When the front beam (120) is tilted upward, at least a portion of the first pull rod (310) rotates relative to the first adapter (320) to fold the first stretching portion (300).

5. The quay crane according to claim 1, wherein: The second stretching portion (500) comprises: a plurality of second pull rods (510) and at least one second adapter (520), two adjacent second pull rods (510) are connected via one second adapter (520), and the second pull rod (510) at the head end is hinged to the support frame (400), and the first pull rod (310) at the tail end is hinged to the front beam (120); When the sea-side ladder frame (200) is in the erected state or the tilted state, a plurality of the second tie rods (510) are in the same straight line; When the front beam (120) is tilted upward, at least a portion of the second pull rod (510) rotates relative to the second adapter (520) to fold the second stretching portion (500).

6. The quay crane according to any one of claims 1 to 5, further comprising: A land-side ladder frame (600), the land-side ladder frame (600) being arranged on the rear beam (110) and located on a side of the sea-side ladder frame (200) away from the front beam (120); A connecting rod (610), wherein a first end of the connecting rod (610) is connected to the land-side ladder frame (600), and a second end of the connecting rod (610) is connected to the support frame (400).

7. The quay crane according to claim 6, further comprising: A rear pull rod (700), wherein the rear pull rod (700) is located on a side of the land side ladder frame (600) facing away from the sea side ladder frame (200), a first end of the rear pull rod (700) is hinged to the rear beam (110), and a second end of the rear pull rod (700) is hinged to the land side ladder frame (600) to pull the land side ladder frame (600).

8. The quay crane according to claim 6, further comprising: A first pulley block (810), wherein the first pulley block (810) is arranged on the sea side ladder frame (200); A second pulley block (820), wherein the second pulley block (820) is arranged on the land-side ladder frame (600); A laying down and winding system, the laying down and winding system comprises a driving unit and a steel wire rope (830), the steel wire rope (830) is wound around the second pulley group (820) and the first pulley group (810), and the steel wire rope (830) is connected to the driving unit, and the driving unit is configured to drive the sea side ladder frame (200) to switch between the erect state and the tilted state by retracting and releasing the steel wire rope (830).

9. The quay crane according to claim 6, further comprising: A rear support rod (900), wherein the rear support rod (900) is located on a side of the sea-side ladder frame (200) away from the front beam (120), and a first end of the rear support rod (900) is detachably connected to the rear beam (110), and a second end of the rear support rod (900) is connected to the sea-side ladder frame (200) to pull the sea-side ladder frame (200).

10. The quay crane according to claim 9, further comprising: A slide rail (620), wherein the slide rail (620) is arranged on the rear beam (110); When the sea-side ladder frame (200) rotates from the upright state to the tilted state, the first end of the rear support rod (900) is slidably disposed on the slide rail (620).

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