Auxiliary tie rod for front boom of quayside container crane, and quayside container crane

Abstract

Provided in the present invention is an auxiliary tie rod for a front boom of a quayside container crane, which is applied to a quayside container crane. The quayside container crane comprises a main frame structure, a front boom and a main tie rod, wherein the front boom and the main tie rod are both connected to the main frame structure; and the main tie rod comprises a first tie rod and a second tie rod, with one end of the first tie rod and one end of the second tie rod being connected to the main frame structure, and the other end of the first tie rod and the other end of the second tie rod both being connected to the front boom. The auxiliary tie rod comprises: a first rod member, with a first end of the first rod member being hinged to the front boom; a connector, with a first end of the connector being hinged to a second end of the first rod member; and a second rod member, with a first end of the second rod member being hinged to a second end of the connector, and a second end of the second rod member being hinged to the middle of the second tie rod. By means of the provision of the foldable auxiliary tie rod between the front boom and the second tie rod, the present invention reduces the bouncing of the main tie rod and the sway of the front boom when a trolley picks and places a container, thereby improving the vertical stiffness of the front boom, and facilitating an improvement in the stability and reliability of the quayside container crane during operation.

Description

Auxiliary pull rod of shore-to-ship crane front girder and shore-to-ship crane

[0001] The present application claims priority to the Chinese patent application No. 202411092798.7, filed on August 9, 2024, and entitled "Auxiliary pull rod of shore-to-ship crane front girder", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of shore-to-ship crane, in particular to an auxiliary pull rod of shore-to-ship crane front girder and a shore-to-ship crane. BACKGROUND

[0003] The shore-to-ship crane (hereinafter referred to as shore-to-ship crane) is a professional special equipment used for loading and unloading operations of container ships at the container wharf. The trolley goes back and forth between the container ship and the wharf to load and unload containers through the spreader. The front girder and the rear girder are connected by hinges, and the front girder is pulled by the pull rod. The pull rod and the front girder are also connected by hinges, so the front girder can be raised around the hinge point.

[0004] The conventional pull rod of the shore-to-ship crane front girder is composed of multiple links, which will produce catenary effect under the influence of the self-weight of the front girder, and the vertical stiffness is poor due to the long length of the front girder. When the trolley travels to the maximum forward distance, the catenary of the pull rod will be straightened from the overhanging state, which will cause additional deflection of the girder. When the container grabbing and placing operation is performed, the trolley and the front girder will change under the load, causing the front girder and the pull rod to jump up and down, increasing the vertical deformation and shaking of the front girder, and affecting the stability of the shore-to-ship crane operation. SUMMARY

[0005] Therefore, the present application provides an auxiliary pull rod of shore-to-ship crane front girder and a shore-to-ship crane, which can solve the problem of the front girder and the pull rod jumping up and down and shaking, which affects the stability of the shore-to-ship crane operation.

[0006] To solve the above technical problems, the present application adopts the following technical solutions:

[0007] The present application provides an auxiliary pull rod of shore-to-ship crane front girder, which is applied to a shore-to-ship crane. The shore-to-ship crane comprises a main frame structure, a front girder and a main pull rod. The front girder and the main pull rod are connected with the main frame structure. The main pull rod comprises a first pull rod and a second pull rod. One end of the first pull rod is connected with one end of the second pull rod and the main frame structure. The other end of the first pull rod and the other end of the second pull rod are both connected with the front girder,

[0008] The auxiliary pull rod comprises:

[0009] A first rod member, the first end of the first rod member being hinged with the front girder;

[0010] A connecting member, the first end of the connecting member being hinged with the second end of the first rod member;

[0011] The second rod member is hingedly connected at a first end thereof to the second end of the connecting member and at a second end thereof to a middle portion of the second tension rod.

[0012] In one embodiment of the present application, the second end of the first rod member is provided with a first clamping shaft, the first end of the connecting member is provided with two symmetrically arranged first clamping grooves matched with the first clamping shaft, and the first clamping shaft is arranged to rotate between the two first clamping grooves to limit the rotation range of the first rod member when the girder is raised and to make the first rod member rotate in a directional manner.

[0013] In one embodiment of the present application, the first end of the second rod member is provided with a second clamping shaft, and the second end of the connecting member is provided with a second clamping groove matched with the second clamping shaft, and the second clamping groove is arranged to make the second rod member rotate in a directional manner.

[0014] In one embodiment of the present application, the front girder is provided with a first guide assembly, and the sidewalls of the first rod member and the second rod member are provided with a second guide assembly matched with the first guide assembly, and the second guide assembly is arranged to fix the auxiliary tension rod.

[0015] In one embodiment of the present application, the first end of the first rod member is provided with a first lug plate connected with the front girder, the front girder is provided with a front girder lug plate matched with the first lug plate, and the first lug plate is connected with the front girder lug plate; the second end of the second rod member is provided with a second lug plate connected with the second tension rod, and the second tension rod is provided with a main tension rod lug plate matched with the second lug plate, and the second lug plate is connected with the main tension rod lug plate.

[0016] In one embodiment of the present application, the first lug plate comprises two symmetrically arranged first lug plate members, and the front girder lug plate is located between the two first lug plate members; the second lug plate comprises two symmetrically arranged second lug plate members, and the main tension rod lug plate is located between the two second lug plate members.

[0017] In one embodiment of the present application, the first end of the first rod member is provided with an adjusting member, the adjusting member is connected with the first lug plate member through a fastener, and the adjusting member is arranged to adjust the pre-tightening force of the auxiliary tension rod on the main tension rod.

[0018] In one embodiment of the present application, the adjusting member is an eccentric sleeve, the fastener is a plurality of bolts, the eccentric sleeve is provided with a plurality of bolt holes matched with the bolts in the circumferential direction, and the eccentric sleeve is bolted with the first lug plate member.

[0019] In one embodiment of the present application, the first rod member comprises a first connecting shaft, the first lug plate is connected with the front girder lug plate through the first connecting shaft; and the second rod member comprises a second connecting shaft, and the second lug plate is connected with the main tension rod lug plate through the second connecting shaft.

[0020] In one embodiment of the present application, the first rod further comprises a first spacer, which is located between the front girder lug plate and the first lug plate, and is used to adjust the distance between the first lug plate and the front girder lug plate.

[0021] The second rod further comprises a second spacer, which is located between the main pull rod lug plate and the second lug plate, and is used to adjust the distance between the second lug plate and the main pull rod lug plate.

[0022] The above technical solutions of the present application have at least the following beneficial effects:

[0023] The auxiliary pull rod of the shore crane front girder of the present application can provide pre-tightening force to make the main pull rod tight by setting the foldable auxiliary pull rod between the front girder and the second pull rod of the main pull rod. Compared with the traditional shore crane trolley that bounces and shakes when performing the grab-and-drop box operation, the auxiliary pull rod of the present application can tighten the main pull rod and the front girder during the shore crane operation, which can reduce the bounce of the main pull rod and the shake of the front girder, reduce the deflection of the front girder, and improve the vertical stiffness of the front girder, thereby helping to improve the stability and reliability of the shore crane during operation. At the same time, the auxiliary pull rod is composed of three independent components, i.e., the first rod, the connecting piece, and the second rod. The three components can be folded when the distance between the front girder and the main pull rod changes during the lifting of the shore crane, which does not affect the lifting working condition of the girder, and is conducive to maintaining the stability of the shore crane structure. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 is a structural schematic diagram of a shore crane device according to some embodiments;

[0025] Fig. 2 is a structural schematic diagram of a shore crane device according to some embodiments;

[0026] Fig. 3 is a structural schematic diagram of an auxiliary pull rod of a shore crane front girder according to one embodiment of the present application;

[0027] Fig. 4 is an enlarged view of A in Fig. 3;

[0028] Fig. 5 is a structural schematic diagram of a shore crane device according to some embodiments;

[0029] Fig. 6 is a structural schematic diagram of an auxiliary pull rod of a shore crane front girder according to one embodiment of the present application;

[0030] Fig. 7 is an enlarged view of B in Fig. 5.

[0031] 100, shore-based bridge device; 110, main frame structure; 120, girder; 130, pull rod system; 200, auxiliary pull rod; 210, front girder; 211, first guide assembly; 220, main pull rod; 221, first pull rod; 222, second pull rod; 230, first rod; 231, first clamping shaft; 232, first lug plate; 233, first connecting shaft; 234, first spacer; 235, adjusting piece; 236, fastener; 237, second guide assembly; 240, connecting piece; 241, first clamping groove; 242, second clamping groove; 250, second rod; 251, second clamping shaft; 252, second lug plate. DETAILED DESCRIPTION

[0032] To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0033] To facilitate the understanding of the technical solutions of the present application, the structure of the shore-based bridge device 100 will be described first below.

[0034] Referring to FIG. 1 and FIG. 2, FIG. 1 shows a structural schematic diagram one of the shore-based bridge device 100 according to some embodiments. FIG. 2 shows a structural schematic diagram two of the shore-based bridge device 100 according to some embodiments. As shown in FIG. 1 and FIG. 2, the shore-based bridge device 100 includes a main frame structure 110, a girder 120 and a pull rod system 130. The main frame structure 110 is located at the middle part and is used to support the whole shore-based bridge device 100. The girder 120 includes a front girder 210 and a rear girder connected with each other and has a trolley track to support the operation of the trolley. The pull rod system 130 connects the main frame structure 110 and the front girder 210 and forms a triangular stable structure to keep the shore-based bridge structure stable.

[0035] A front girder 210 auxiliary pull rod 200 according to an embodiment of the present application will be described in detail below with reference to the drawings.

[0036] Figure 3 shows a schematic diagram of the auxiliary tie rod 200 of the front beam 210 of a quay crane according to an embodiment of the present invention. Referring to Figures 1 and 2, and also referring to Figure 3, the quay crane includes a main frame structure 110, a front beam 210, and a main tie rod 220. The main frame structure 110 serves as the main structure of the quay crane, supporting the entire quay crane device 100. The front beam 210, as the main structure of the quay crane, bears the weight of the moving trolley. The main tie rod 220 is used to connect to the front beam 210. Both the front beam 210 and the main tie rod 220 are connected to the main frame structure 110, forming a triangular structure that helps maintain the stability of the quay crane structure. The main tie rod 220 includes a first tie rod 221 and a second tie rod 222. One end of the first tie rod 221 (the upper end in Figure 1) and one end of the second tie rod 222 (the upper end in Figure 1) are connected to the main frame structure 110. The other ends of the first tie rod 221 (lower end in Figure 1) and the other ends of the second tie rod 222 (lower end in Figure 1) are both connected to the front girder 210. The lower end of the first tie rod 221 is connected to the middle position of the front girder 210, and the lower end of the second tie rod 222 is connected to one end of the front girder 210 (rightmost end in Figure 1). The front girder 210 has a long overhang, and the connection points of the first tie rod 221 and the second tie rod 222 with the front girder 210 do not coincide, which helps to maintain the overall structural stability of the front girder 210. The auxiliary tie rod 200 of the front girder 210 of the quay crane includes a first member 230, a connector 240, and a second member 250, and is used on the quay crane.

[0037] The first end of the first member 230 is hinged to the front beam 210. The first end of the connecting member 240 is hinged to the second end of the first member 230. The first end of the second member 250 is hinged to the second end of the connecting member 240, and the second end of the second member 250 is hinged to the middle part of the second tie rod 222.

[0038] In an embodiment of the invention, the auxiliary tie rod 200 is composed of three independent hinged components: a first member 230, a connector 240, and a second member 250. The first member 230 and the second member 250 have an I-beam structure. The first member 230 connects to the middle section of the front main beam 210. The second member 250 connects to the second tie rod 222. The connector 240 connects the first member 230 and the second member 250. When the quay girder is raised, the front main beam 210 is raised around the hinge point connecting to the rear main beam, and the first tie rod 221 and the second tie rod 222, which are the main tie rods 220, change from a straightened state to a folded state. The auxiliary tie rod 200 also folds as the positions of the front main beam 210 and the main tie rod 220 change, without affecting the raising of the main beam, which helps maintain the stability of the quay girder structure.

[0039] Compared with the existing technology, the front girder 210 and the pull rod will bounce and shake when the spreader of the quay crane goes back and forth to grab and drop the container, the auxiliary pull rod 200 provides pre-tightening force when the quay crane is horizontally working, tightens the main pull rod 220 and the front girder 210, reduces the bounce and shake of the main pull rod 220 and the front girder 210, reduces the vertical deformation of the front girder 210 and improves the vertical stiffness of the front girder 210, and helps to improve the stability and reliability of the quay crane when working. Meanwhile, the auxiliary pull rod 200 is composed of three independent parts. The three parts can be folded when the distance between the front girder 210 and the main pull rod 220 changes when the girder of the quay crane is raised, so as to avoid the interference between the auxiliary pull rod 200 and the front girder 210 and the main pull rod 220, and facilitate the normal operation of the quay crane girder in the raised working condition.

[0040] In one embodiment of the present application, referring to FIG. 4, FIG. 4 shows an enlarged view of A in FIG. 3. As shown in FIG. 4, the second end of the first rod 230 is provided with a first clamping shaft 231. The first end of the connecting piece 240 is provided with two first clamping grooves 241 with opposite opening directions. The cross section of the two first clamping grooves 241 is semicircular, the cross section of the first clamping shaft 231 is circular, and the arc-shaped distance between the two first clamping grooves 241 forms a certain angle. The first clamping groove 241 matches the first clamping shaft 231, and is used for rotating the first clamping shaft 231 between the two first clamping grooves 241.

[0041] In one embodiment of the present application, as shown in FIG. 2 and FIG. 4, the first end of the second rod 250 is provided with a second clamping shaft 251, and the second end of the connecting piece 240 is provided with a second clamping groove 242 matched with the second clamping shaft 251. The cross section of the second clamping groove 242 is semicircular, and the cross section of the second clamping shaft 251 is circular. The second clamping groove 242 matches the second clamping shaft 251, and is used for limiting the second clamping shaft to rotate the second rod 250 in a certain direction. Specifically, when the quay crane is raised, the first end of the first rod 230 rotates clockwise along the axis of the connecting lug plate to be close to the front girder 210, the first end of the connecting piece 240 rotates counterclockwise along the connecting axis between the second end of the first rod 230 from one of the first clamping grooves 241 to the other first clamping groove 241, and the second rod 250 rotates counterclockwise along the axis of one end of the connecting lug plate to be close to the second pull rod 222 of the main pull rod 220.

[0042] Next, an embodiment of the present application is described in conjunction with Fig. 3 and in reference to Fig. 5. Fig. 5 shows a structural schematic diagram III of the shore-based bridge device 100 of some embodiments. As shown in Fig. 3 and Fig. 5, the front girder 210 is provided with a first guide assembly 211, and the first guide assembly 211 is provided with a groove. The lower side wall of the first rod member 230 and the upper side wall of the second rod member 250 are provided with a second guide assembly 237 matching the first guide assembly 211, for fixing the auxiliary pull rod 200. The second guide assembly 237 is protrudingly arranged on the side walls of the first rod member 230 and the second rod member 250. When the shore-based bridge is raised, the second guide assembly 237 moves with the folding of the auxiliary pull rod 200 and rests in the groove of the first guide assembly 211, thereby achieving further fixation between the auxiliary pull rod 200 and the front girder 210. The first guide assembly 211 and the second guide assembly 237 are commonly used devices in shore-based bridges, and the specific structure is not described here.

[0043] In an embodiment of the present application, as shown in Fig. 2 and Fig. 3, the first end of the first rod member 230 is provided with a first lug plate 232 connected with the front girder 210, and the front girder 210 is provided with a front girder 210 lug plate (not shown) matching the first lug plate 232. The auxiliary pull rod 200 is connected with the front girder 210 lug plate through the first lug plate 232, facilitating the connection between the auxiliary pull rod 200 and the front girder 210. The second end of the second rod member 250 is provided with a second lug plate 252 connected with the second pull rod 222, and the second pull rod 222 is provided with a main pull rod 220 lug plate (not shown) matching the second lug plate 252. The auxiliary pull rod 200 is connected with the main pull rod 220 lug plate through the second lug plate 252, facilitating the connection between the auxiliary pull rod 200 and the second pull rod 222.

[0044] Next, an embodiment of the present application is described in conjunction with Fig. 2 and in reference to Fig. 6. Fig. 6 shows a structural schematic diagram II of the auxiliary pull rod 200 of the front girder 210 of an embodiment of the present application. As shown in Fig. 2 and Fig. 6, the first lug plate 232 includes two first lug plates 232 arranged symmetrically, and the front girder 210 lug plate is located between the two first lug plates 232, facilitating the alignment connection between the auxiliary pull rod 200 and the front girder 210. The second lug plate 252 includes two second lug plates 252 arranged symmetrically, and the main pull rod 220 lug plate is located between the two second lug plates 252, facilitating the alignment connection between the auxiliary pull rod 200 and the main pull rod 220.

[0045] Next, an embodiment of the present application is described in conjunction with Fig. 2 and in reference to Fig. 7. Fig. 7 shows an enlarged view of B in Fig. 6. As shown in Figs. 2 and 7, the first end of the first rod member 230 is provided with an adjusting member 235, which is an eccentric structure. The adjusting member 235 is connected with the first ear plate 232 by fasteners 236, i.e. the adjusting member 235 is fixed on the first rod member 230, for adjusting the pre-tightening force of the auxiliary rod 200 on the main rod 220.

[0046] In an embodiment of the present application, as shown in Figs. 2 and 7, the adjusting member 235 is an eccentric sleeve, which is a steel ring with a boss, and the inner diameter hole position is eccentric relative to the outer diameter. The fasteners 236 are bolts, and the eccentric sleeve is provided with a plurality of bolt holes matching the bolts in the circumferential direction. The two eccentric sleeves are bolted with the two first ear plates 232 respectively, so as to fix the eccentric sleeve on the first rod member 230. The axis of the eccentric sleeve is eccentric to the axis of the first ear plate 232, and the pre-tightening force of the auxiliary rod 200 on the second rod 222 can be adjusted by adjusting the size of the eccentricity to ensure axial fixation and change the circumferential diameter of the inner ring, so as to further tighten the second rod 222.

[0047] In an embodiment of the present application, as shown in Figs. 2 and 6, the first rod member 230 includes a first connecting shaft 233, and the first ear plate 232 is connected with the front girder 210 ear plate through the first connecting shaft 233, i.e. the first rod member 230 is connected with the front girder 210 in the shaft hole mode. The second rod member 250 includes a second connecting shaft, and the second ear plate 252 is connected with the main rod 220 ear plate through the second connecting shaft, i.e. the second rod member 250 is connected with the main rod 220 in the shaft hole mode, so as to facilitate improving the stability of the shore crane structure. The first connecting shaft 233 and the second connecting shaft are provided with clamping grooves in which clamping shaft plates can be placed, and the clamping shaft plates can further fix the positions of the connecting shafts to prevent the shafts from moving. The clamping shaft plates are provided with bolt holes through which the fasteners 236, i.e. the bolts, can pass to fix the auxiliary rod 200 with the clamping plate shaft and the eccentric sleeve, so as to improve the stability of the auxiliary rod 200.

[0048] In an embodiment of the present application, as shown in Figs. 2 and 7, the first rod member 230 further includes a first isolation member 234, which is a spacer. The spacer is a hollow annular ring. The first isolation member 234 is located between the front girder 210 ear plate and the first ear plate 232, for adjusting the distance between the first ear plate 232 and the front girder 210 ear plate, so as to avoid excessive friction between the first ear plate 232 and the front girder 210 ear plate, and facilitate improving the service life of the ear plate.

[0049] The second rod member 250 further comprises a second spacer, which is a spacer sleeve. The spacer sleeve is hollow and annular. The second spacer is located between the lug plate of the main tension rod 220 and the second lug plate 252, and is used to adjust the distance between the second lug plate 252 and the lug plate of the main tension rod 220, so as to avoid excessive friction between the second lug plate 252 and the lug plate of the main tension rod 220, and to improve the service life of the lug plate.

[0050] The working principle of the auxiliary tension rod 200 of the shore-to-ship container crane front girder 210 will be described below in combination with the structure of the auxiliary tension rod 200.

[0051] The first rod member 230, the connecting member 240 and the second rod member 250 are sequentially connected to form the auxiliary tension rod 200. The first rod member 230 is connected to the front girder 210, and the second rod member 250 is connected to the second tension rod 222. When the shore-to-ship container crane girder is raised, the front girder 210 is raised upwards around the hinge point connected to the rear girder, and the auxiliary tension rod 200 is also folded along with the folding of the main tension rod 220. The first end of the first rod member 230 rotates clockwise along the axis of the lug plate connected to the front girder 210 to be close to the front girder 210, the first end of the connecting member 240 rotates counterclockwise along the axis connected to the second end of the first rod member 230 from one of the first clamping grooves 241 to the other first clamping groove 241, and the second rod member 250 rotates counterclockwise along the axis of the lug plate to be close to the second tension rod 222 of the main tension rod 220. The second guide assembly 237 on the auxiliary tension rod 200 is clamped with the first guide assembly 211 on the front girder 210, so as to further fix the auxiliary tension rod 200 on the front girder 210. When the shore-to-ship container crane front girder 210 changes from the raised state to the horizontal working state, the auxiliary tension rod 200 is also straightened along with the straightening of the main tension rod 220. The auxiliary tension rod 200 provides pre-tightening force to make the second tension rod 222 tight, so as to constrain the bounce of the second tension rod 222 and the deflection of the front girder 210.

[0052] In summary, the auxiliary tension rod 200 of the shore-to-ship container crane front girder 210 can provide pre-tightening force to make the main tension rod 220 tight by arranging the foldable auxiliary tension rod 200 between the front girder 210 and the second tension rod 222. The auxiliary tension rod 200 can tighten the second tension rod 222 and the front girder 210 during the shore-to-ship container crane loading and unloading operation, so as to reduce the bounce of the second tension rod 222 and the front girder 210, reduce the vertical deformation of the front girder 210 and improve the vertical rigidity of the front girder 210, which is helpful to improve the stability and reliability of the shore-to-ship container crane during operation. Meanwhile, the auxiliary tension rod 200 is composed of three independent components, i.e. the first rod member 230, the connecting member 240 and the second rod member 250. The three components can be folded when the shore-to-ship container crane is raised, and the distance between the front girder 210 and the main tension rod 220 changes, which does not affect the raised working condition of the girder, and is conducive to maintaining the stability of the shore-to-ship container crane structure.

[0053] According to the application, a shore bridge is provided, which comprises the auxiliary pull rod 200 of the shore bridge front girder 210.

[0054] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the common meaning to those skilled in the art to which the present application pertains. The terms "first", "second", and similar terms are not intended to denote any order, quantity, or importance, but are used to distinguish different components. Similarly, the terms "one" or "a" or "an" do not denote a quantity of limitation, but mean that there is at least one. The terms "connected" or "coupled" or similar terms are not limited to a physical or mechanical connection or coupling, but can include an electrical connection or coupling, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like are used only to indicate relative positions, and when the absolute positions of the described objects are changed, the relative positions are also changed accordingly.

[0055] The above is the preferred embodiment of the present application. It should be noted that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. An auxiliary pull rod of a shore-to-ship front girder, applied to a shore-to-ship bridge, characterized in that, The shore-based bridge comprises a main frame structure, a front beam and a main pull rod, the front beam and the main pull rod are connected with the main frame structure, the main pull rod comprises a first pull rod and a second pull rod, one end of the first pull rod is connected with one end of the second pull rod and the main frame structure, the other end of the first pull rod and the other end of the second pull rod are connected with the front beam, The auxiliary pull rod comprises: A first rod, a first end of the first rod is hinged with the front beam; A connecting piece, a first end of the connecting piece is hinged with a second end of the first rod; A second rod, a first end of the second rod is hinged with a second end of the connecting piece, and a second end of the second rod is hinged with a middle part of the second pull rod.

2. The supplemental tie rod for a shore-to- shore gantry front boom as set forth in claim 1, wherein, A first clamping shaft is arranged at the second end of the first rod, a first clamping groove is arranged at the first end of the connecting piece, the first clamping groove is matched with the first clamping shaft, the first clamping shaft is rotated between the two first clamping grooves, so as to limit the rotation range of the first rod and make the first rod rotate in a directional manner.

3. The supplemental tie rod for a shore-to- shore gantry front boom as set forth in claim 1 or 2, characterized by, A second clamping shaft is arranged at the first end of the second rod, a second clamping groove is arranged at the second end of the connecting piece, the second clamping groove is matched with the second clamping shaft, so as to make the second rod rotate in a directional manner.

4. The supplemental tie rod for a shore-to- shore gantry front boom as set forth in claim 1, wherein, A first lug plate is arranged at the first end of the first rod and connected with the front beam, a front beam lug plate is arranged on the front beam and matched with the first lug plate, and the first lug plate is connected with the front beam lug plate; A second lug plate is arranged at the second end of the second rod and connected with the second pull rod, a main pull rod lug plate is arranged on the second pull rod and matched with the second lug plate, and the second lug plate is connected with the main pull rod lug plate.

5. The supplemental tie rod for a shore-to- shore gantry front boom as set forth in claim 4, wherein, The first lug plate comprises two first lug plate pieces arranged symmetrically, and the front beam lug plate is located between the two first lug plate pieces; The second lug plate comprises two second lug plate pieces arranged symmetrically, and the main pull rod lug plate is located between the two second lug plate pieces.

6. The supplemental tie rod for a shore-to- shore gantry front boom as set forth in claim 5, wherein, An adjusting piece is arranged at the first end of the first rod, the adjusting piece is connected with the first lug plate piece through a fastener, and is used for adjusting the pre-tightening force of the auxiliary pull rod on the main pull rod.

7. The supplemental tie rod for a shore-to- shore gantry front boom as set forth in claim 6, wherein, The adjusting piece is an eccentric sleeve, the fastener is a plurality of bolts, the eccentric sleeve is circumferentially provided with a plurality of bolt holes matched with the bolts, and the eccentric sleeve is bolted with the first lug plate piece.

8. The supplemental tie rod for a shore-to- shore gantry front boom as set forth in claim 1, wherein, A first guide assembly is arranged on the front beam, and a second guide assembly matched with the first guide assembly is arranged on the side wall of the first rod, so as to fix the auxiliary pull rod.

9. The supplemental tie rod for a shore-to- shore gantry front boom as set forth in claim 5, wherein, The first rod comprises a first connecting shaft, the first lug plate is connected with the front beam lug plate through the first connecting shaft; The second rod comprises a second connecting shaft, and the second lug plate is connected with the main pull rod lug plate through the second connecting shaft.

10. The supplemental tie rod for a shore-to- shore gantry front boom as set forth in claim 9, wherein, The first rod further comprises a first isolation piece, the first isolation piece is located between the front beam lug plate and the first lug plate piece, and is used for adjusting the distance between the first lug plate and the front beam lug plate. The second rod member further comprises a second spacer member, which is located between the main rod ear plate and the second ear plate member, for adjusting the distance between the second ear plate and the main rod ear plate.

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