Hoisting method of front beam of quay crane

Abstract

The present invention provides a method for lifting the front beam of a quay crane, comprising: installing a lifting hook, a rotating support hook and an anti-stringing hook on the front beam. Installing a rotating support auxiliary hook that cooperates with the rotating support hook on the rear beam of the quay crane. Installing an anti-stringing auxiliary hook that cooperates with the anti-stringing hook on the connecting crossbeam of the quay crane. Connecting the rotating support hook and the rotating support auxiliary hook, and connecting the anti-stringing hook and the anti-stringing auxiliary hook. Connecting the hook of a floating crane and the lifting hook of the front beam, and using the hook to lift the front beam. When the front beam is detached from the cargo ship, disconnecting the rotating support hook and the rotating support auxiliary hook, and disconnecting the anti-stringing hook and the anti-stringing auxiliary hook. Lifting the front beam as a whole to a designated position, and disconnecting the lifting hook and the hook. The above-mentioned lifting method can reduce stringing in all directions generated during the lifting process of the front beam.

Description

Technical Field

[0001] The invention relates to a shore container crane, and in particular to a method for hoisting a front beam of a shore crane. Background Art

[0002] During a ship unloading operation at a container terminal, a quay crane, due to its outdated structure, suffered a break in the front tie rods of the quay crane's front girder. The girder broke at the hinge point, causing it to fall completely onto the unloading container ship. The girder, resting on the container ship, was in an extremely unstable state. During the lifting process, the containers trapped beneath it could collapse due to impact or other forces.

[0003] The conventional method for hoisting the front beam is to use a double-hook or four-hook floating crane. Specifically, the center of gravity of the front beam is calculated, and four process lifting brackets are welded to the left and right side panels of the beam. The floating crane is then used to lift the beam from the side.

[0004] However, given the on-site construction conditions, the above conventional construction methods have the following problems: Since the beam was pressed against the container ship before the accident, the floating crane could not lift it by leaning against the side of the front beam. The design time of the quay crane where the accident occurred was quite long ago, and its weight and center of gravity are difficult to calculate accurately. When the beam where the accident occurred was lifted, due to the deviation between the actual structural center of gravity of the beam and the calculated center of gravity, it would cause displacement to the front, back, left and right during the lifting process. The front beam is in a non-horizontal state. During the lifting process, the front beam cannot synchronize the overall upward lifting movement. The asynchrony of the four lifting points will cause additional local extrusion and impact in uncertain directions on the container supporting the beam, causing the container to collapse after the beam is lifted, thus causing a secondary accident. This will cause the front beam to shake during the lifting and transportation process, thereby affecting the safety of the lifting. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for hoisting a front beam of a quay crane, which can reduce the string movement in all directions generated during the hoisting process of the front beam.

[0006] According to one aspect of the present invention, there is provided a method for lifting a front beam of a quay crane, which is applicable to an accident condition in which a hinge of the front beam is broken and the beam is laid on a seaside cargo ship; in the accident condition, the central axis of the front beam is tilted relative to the horizontal axis; the method comprises: installing a lifting hook, a rotating support hook and an anti-stringing lifting hook on the front beam; installing a rotating support auxiliary hook that cooperates with the rotating support hook on the rear beam of the quay crane; installing an anti-stringing auxiliary hook that cooperates with the anti-stringing lifting hook on the connecting crossbeam of the quay crane; connecting the rotating support hook and the rotating support auxiliary hook, and connecting the anti-stringing lifting hook and the anti-stringing auxiliary hook; connecting a hook of a floating crane and the lifting hook of the front beam, and using the hook to lift the front beam; when the front beam is separated from the cargo ship, disconnecting the rotating support hook and the rotating support auxiliary hook and the anti-stringing lifting hook and the anti-stringing lifting hook; lifting the front beam as a whole to a specified position, and disconnecting the lifting hook and the hook.

[0007] In one embodiment, before installing the lifting hooks, rotating support hooks and anti-stringing hooks on the front beam, the lifting method further includes: obtaining an empirical value of the theoretical center of gravity of the front beam; determining a front beam design drawing of the number and position of the lifting hooks, rotating support hooks and anti-stringing hooks of the front beam according to the position of the theoretical center of gravity of the front beam; determining a rear beam design drawing of the rear beam of the quay crane and the rotating support auxiliary hooks that cooperate with the rotating support hooks; determining a connecting beam design drawing of the connecting beam of the quay crane and the anti-stringing auxiliary hooks that cooperate with the anti-stringing hooks.

[0008] In one embodiment, the installation of lifting hooks, rotating support hooks and anti-stringing hooks on the front beam includes: installing multiple lifting hooks and multiple rotating support hooks on the top of the front beam according to the front beam design drawing; and installing multiple anti-stringing hooks on the side of the front beam according to the front beam design drawing.

[0009] In one embodiment, the number of the lifting hooks is four, and the four lifting hooks are axially symmetrically arranged with the central axis of the front beam; and / or the number of the rotating support hooks is two, and the two rotating support hooks are close to the hinge point of the front beam relative to the lifting hooks, and are axially symmetrically arranged with the central axis of the front beam; and / or the number of the anti-stringing hooks is two, and the two anti-stringing hooks are located at the hinge point of the front beam, and are respectively arranged on the two sides of the front beam.

[0010] In one embodiment, the lifting hook and the rotating support hook are both single-hole hooks, and the anti-stringing hook is a double-hole hook.

[0011] In one embodiment, the rotating support auxiliary hanging weight installed on the rear beam of the quay crane and cooperating with the rotating support hanging weight includes: according to the design drawing of the rear beam, a plurality of the rotating support auxiliary hanging weights are installed at the bottom of the rear beam.

[0012] In one embodiment, the number of the rotary support auxiliary hanging brackets is two, and the two rotary support auxiliary hanging brackets are located below the sea side upper beam of the quay crane and are symmetrically arranged with respect to the central axis of the rear beam.

[0013] In one embodiment, the anti-string auxiliary hanging weight installed on the connecting beam of the quay crane and coordinated with the anti-string hanging weight includes: according to the design drawing of the connecting beam, a plurality of the anti-string auxiliary hanging weights are symmetrically arranged on the two connecting beams.

[0014] In one embodiment, there are four anti-string auxiliary hanging weights, and two of the two connecting beams are respectively provided with two anti-string auxiliary hanging weights, and the anti-string auxiliary hanging weights are arranged closer to the sea side lower beam relative to the land side lower beam.

[0015] In one embodiment, the connecting of the rotating support hanging weight and the rotating support auxiliary hanging weight, and the connecting of the anti-string hanging weight and the anti-string auxiliary hanging weight, includes: connecting a wire rope between the rotating support hanging weight and the corresponding rotating support auxiliary hanging weight, and tightening it with a hand winch; connecting a wire rope between the anti-string hanging weight and the corresponding anti-string auxiliary hanging weight, and tightening it with a hand winch.

[0016] In one embodiment, the hook of the floating crane is connected to the lifting hook of the front beam, and the front beam is lifted by the hook, including: arranging the floating crane and stopping the floating crane directly in front of the front beam; obtaining the angle between the front beam and the horizontal axis, and moving the hook of the floating crane to a position close to the sea side relative to the theoretical center of gravity of the front beam according to the angle; connecting a wire rope between the hook of the floating crane and the lifting hook of the front beam; lifting the hook, and controlling the hook to move toward the land side.

[0017] In one embodiment, when the front beam is detached from the cargo ship, the connection between the rotating support hoist and the rotating support auxiliary hoist and the connection between the anti-stringing hoist and the anti-stringing auxiliary hoist are disconnected, including: when the wire rope connecting the hook and the lifting hoist is fully stressed, the front beam is detached from the cargo ship, the wire rope connecting the rotating support hoist and the rotating support auxiliary hoist and the wire rope connecting the anti-stringing hoist and the anti-stringing auxiliary hoist are removed; and the hook is controlled to be raised upward by 1-2m.

[0018] The hoisting method of the front beam of the quay crane of the present invention utilizes the rear beam of the quay crane and the connecting crossbeam as the fixed and rotating support basis during the hoisting process of the beam before the accident. The mutually connected rotating support lifting code and the rotating support auxiliary lifting code and the mutually connected anti-stringing lifting code and the anti-stringing auxiliary lifting code can reduce the stringing in all directions during the hoisting process of the front beam, ensure that the beam is safely and stably lifted and transported before the accident, reduce the additional horizontal local extrusion impact caused by the containers on the sea-side cargo ship supporting the beam, and avoid the collapse of the container after the beam is lifted, causing a secondary accident. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0020] Figure 1 This is a flow chart of an embodiment of a method for hoisting a front girder of a quay crane according to the present invention;

[0021] Figure 2 yes Figure 1 The schematic diagram of the lifting hooks in the front beam design drawing in the lifting method shown;

[0022] Figure 3 yes Figure 2 The enlarged view of point Ⅰ in the middle;

[0023] Figure 4 yes Figure 2 Enlarged view of the middle II;

[0024] Figure 5 yes Figure 1 The rear beam design drawing and the lifting hook diagram of the cross beam design drawing in the lifting method shown;

[0025] Figure 6 yes Figure 5 Side view of the rear beam and door frame structure shown;

[0026] Figure 7 yes Figure 5 A front view of a portion of the connecting crossbeam and the lower crossbeam is shown;

[0027] Figure 8 yes Figure 6 Enlarged view of point III in the middle;

[0028] Figure 9 yes Figure 7 Enlarged view of position IV in the middle;

[0029] Figure 10 yes Figure 1 The schematic diagram of the completion of step S500 in the hoisting method shown;

[0030] Figure 11 yes Figure 10 Top view of;

[0031] Figure 12 yes Figure 10 A side view of the land side;

[0032] Figure 13 yes Figure 1 The schematic diagram of the hoisting method shown in step S600 when the current beam is separated from the cargo ship;

[0033] Figure 14 yes Figure 13 Top view of;

[0034] Figure 15 yes Figure 1 Schematic diagram of disconnecting the rotary support hanging bracket and the rotary support auxiliary hanging bracket, and disconnecting the anti-string hanging bracket and the anti-string auxiliary hanging bracket in step S600 of the hanging method shown;

[0035] Figure 16 It is a flow chart of another embodiment of the method for hoisting the front beam of a quay crane according to the present invention. DETAILED DESCRIPTION

[0036] During a ship unloading operation at a container terminal, a quay crane, due to its outdated structure, suffered a break in the front tie rods of the quay crane's front girder. The girder broke at the hinge point, causing it to fall completely onto the unloading container ship. The girder, resting on the container ship, was in an extremely unstable state. During the lifting process, the containers trapped beneath it could collapse due to impact or other forces.

[0037] The conventional method for hoisting the front beam is to use a double-hook or four-hook floating crane. Specifically, the center of gravity of the front beam is calculated, and four process lifting brackets are welded to the left and right side panels of the beam. The floating crane is then used to lift the beam from the side.

[0038] However, in view of the on-site construction conditions, the above conventional construction methods have the following problems:

[0039] 1. As there is only a double-ditch floating crane on site, it is impossible to lift the four process hoists.

[0040] 2. Because the beam was pressed against the container ship before the accident, the floating crane could not lift the beam by leaning against the side of the front beam;

[0041] 3. The quay crane involved in the accident was designed and manufactured by a foreign company 30 years ago. It had undergone numerous subsequent modifications and upgrades, making it difficult to accurately calculate the weight and center of gravity of the beam components. When the beam was lifted, the deviation between its actual structural center of gravity and the calculated center of gravity caused it to move forward, backward, left, and right during the lifting process.

[0042] 4. The front beam is in a non-horizontal state. During the lifting process, the beam cannot synchronize the overall upward lifting movement. The asynchrony of the four lifting points will cause additional local extrusion impact in uncertain directions on the container supporting the beam, causing the container to collapse after the beam is lifted, thereby causing a secondary accident.

[0043] Reference will now be made in detail to embodiments of the present invention, one or more examples of which are illustrated in the accompanying drawings. Each example is provided to explain the present invention, not to limit the present invention. In fact, it will be apparent to those skilled in the art that various modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, features shown or described as part of one embodiment may be used together with another embodiment to produce yet another embodiment. Therefore, the present invention is intended to cover such modifications and variations as fall within the scope of the appended claims and their equivalents.

[0044] The hoisting method of the front beam of the quay crane of the present invention is applied to an accident condition in which the front beam is broken and laid on a seaside cargo ship. In the accident condition, due to the obsolete structure of the quay crane, the front beam of the quay crane is broken due to the breakage of the front tie rod, and the front beam of the quay crane is broken at the unstable hinge point. The entire front beam of the quay crane falls and hits the container ship that is unloading. The front beam is laid on the container of the cargo ship and is in an extremely unstable state. During the lifting process of the beam, the container pressed under the beam may further collapse due to the impact or other forces. Specifically, the central axis of the front beam in the accident condition is tilted relative to the horizontal axis.

[0045] Figure 1 The flowchart of one embodiment of the method for hoisting the front beam of the quay crane of the present invention is shown. Figure 1 As shown, the hoisting method of the present invention includes steps S100 to S700:

[0046] In step S100, a lifting hook, a rotating support hook and an anti-stringing hook are installed on the front beam.

[0047] In step S200, a rotating support auxiliary hanging weight that cooperates with the rotating support hanging weight is installed on the rear beam of the quay crane.

[0048] In step S300, an anti-stringing auxiliary hanging weight coordinated with the anti-stringing hanging weight is installed on the connecting beam of the quay crane.

[0049] In step S400, the rotating support hanging weight and the rotating support auxiliary hanging weight are connected, and the anti-string hanging weight and the anti-string auxiliary hanging weight are connected.

[0050] In step S500, the hook of the floating crane is connected to the lifting hook of the front beam, and the front beam is lifted by using the hook.

[0051] In step S600, when the front beam is separated from the cargo ship, the connection between the rotary support hanging hook and the rotary support auxiliary hanging hook and the connection between the anti-stringing hanging hook and the anti-stringing auxiliary hanging hook are disconnected.

[0052] In step S700, the front beam is hoisted as a whole to a designated position, and the connection between the lifting hook and the lifting bracket is disconnected.

[0053] The hoisting method of the front beam of the quay crane of the present invention utilizes the rear beam of the quay crane and the connecting crossbeam as the fixed and rotating support basis during the hoisting process of the beam before the accident. The mutually connected rotating support lifting code and the rotating support auxiliary lifting code and the mutually connected anti-stringing lifting code and the anti-stringing auxiliary lifting code can reduce the stringing in all directions during the hoisting process of the front beam, ensure that the beam is safely and stably lifted and transported before the accident, reduce the additional horizontal local extrusion impact caused by the containers on the sea-side cargo ship supporting the beam, and avoid the collapse of the container after the beam is lifted, causing a secondary accident.

[0054] Figure 2 The structure of the front beam 10 in the present invention is shown. Figure 2 As shown, the front beam 10 includes a top 11, two side surfaces 12 connected to the top 11, and a hinge 13 at the base of the front beam 10. Under normal operating conditions, the front beam 10 is connected to the rear beam 20 via the hinge 13. However, in an accident, the front beam 10 loses stability and breaks at the hinge 13, causing the entire front beam 10 to fall and hit the container ship being unloaded.

[0055] In one embodiment, before step S100, the hoisting method further includes steps S10 to S20:

[0056] In step S10, the theoretical center of gravity empirical value of the front beam 10 is obtained. Specifically, in S10, the front beam 10 that needs to be hoisted on site is measured, and its weight and center of gravity are calculated. Considering that the front beam 10 has been designed and manufactured for a long time and has undergone many upgrades and modifications, its weight and center of gravity are difficult to calculate accurately. Therefore, the center of gravity of the front beam 10 obtained by S10 is the theoretical center of gravity empirical value, which has a certain deviation from the actual center of gravity. The theoretical center of gravity position of the front beam 10 obtained after calculation is as follows Figure 2 shown.

[0057] According to experience, the axial distance between the theoretical center of gravity and the actual center of gravity is generally less than or equal to 1m.

[0058] In step S20, according to the position of the theoretical center of gravity of the front beam 10, the front beam design drawing of the number and position of the lifting hooks 14, the rotating support hooks 15 and the anti-stringing hooks 16 of the front beam 10 is determined, the rear beam design drawing of the rear beam 20 of the quay crane and the rotating support auxiliary hooks 21 cooperating with the rotating support hooks 15 is determined, and the connecting beam design drawing of the connecting beam 50 of the quay crane and the anti-stringing auxiliary hooks 51 cooperating with the anti-stringing hooks 16 is determined.

[0059] In S20 , each hanging bracket is designed according to the theoretical center of gravity of the front beam 10 calculated in S10 . Figures 2 to 9 The design drawings of the front beam, rear beam and connecting crossbeam in S20 are shown.

[0060] In one embodiment, step S100 further includes steps S110 to S120:

[0061] In step S110 , a plurality of lifting brackets 14 and a plurality of rotating support brackets 15 are installed on the top 11 of the front beam 10 according to the front beam design drawing.

[0062] Among them, the number of the lifting brackets 14 is four, and the four lifting brackets 14 are arranged symmetrically with respect to the central axis of the front beam 10. Specifically, the arrangement positions of the four lifting brackets 14 are as follows: Figure 2 In the side view of the front beam 10, the axial distance between the two lifting brackets 14 arranged axially along the front beam 10 is L3. L3 can be determined based on on-site experience and is not limited by the present invention.

[0063] The rotation support hanging bracket 15 is used as the support point for hoisting rotation, and there are two of them. The arrangement position of the two rotation support hanging brackets 15 is as follows: Figure 2 As shown. The shortest axial distance between the rotating support bracket 15 and the lifting bracket 14 is L2, and the distance between the rotating support bracket 15 and the hinge point 13 is L1. L2 can be determined based on on-site experience and is not limited by the present invention. The value of L1 needs to take into account the relative position between the front beam 10 and the door frame structure 30, and try to keep the wire rope 92 connecting the rotating support bracket 15 and the rotating support auxiliary bracket 21 in a vertical state.

[0064] Continue to refer Figure 2 The two rotating support hanging brackets 15 are located at the hinge point 13 of the front beam 10 relative to the lifting hanging bracket 14, that is, at the root of the front beam 10; and the two rotating support hanging brackets 15 are arranged axially symmetrically with the central axis of the front beam 10.

[0065] Figure 3 Shown Figure 2 The enlarged view of position Ⅰ is a schematic diagram of the lifting hook 14. Figure 3As shown, the lifting bracket 14 is a single hole bracket. The angle between the lifting bracket 14 and the wire rope 91 is Figure 3 α is shown in . Wherein, α is determined according to the actual installation state of the wire rope 91 on site.

[0066] Figure 2 The mark “W1” in FIG. 1 represents the width of the front beam 10 , which can be determined according to the actual structure of the front beam 10 .

[0067] Figure 3 The mark “100% UT” means 100% ultrasonic testing (UT), which means that the component or weld is 100% ultrasonically tested to meet strict quality control requirements.

[0068] The rotary support hanging bracket 15 is a single hole hanging bracket, and its schematic diagram can be referred to Figure 3 The lifting hook 14 is shown.

[0069] In step S120, according to the front beam design drawing, a plurality of anti-traffic hanging weights 16 are installed on the side 12 of the front beam 10. The anti-traffic hanging weights 16 can control the front beam 10 from moving forward, backward, left, and right.

[0070] There are two anti-stringing hanging hooks 16 , which are located at the hinge point 13 of the front beam 10 and are respectively arranged on the two side surfaces 12 of the front beam 10 .

[0071] Figure 4 Schematic diagram of the anti-string hanging code 16 is shown. Figure 4 As shown, the anti-string hanging code 16 is a double-hole hanging code. The angle between the anti-string hanging code 16 and the wire rope 93 is Figure 4 Wherein, β is determined according to the actual installation state of the wire rope 93 on site.

[0072] Figures 5 to 7 The figure shows part of the structure of the quay crane, including the rear beam 20, the door frame structure 30, the diagonal bracing tube 40, the connecting beam 50, the sea side upper beam 60, the sea side lower beam 70 and the land side lower beam 80. Figure 6 The mark “W2” in FIG. 2 represents the width of the rear beam 20 , which can be determined according to the actual structure of the rear beam 20 .

[0073] In one embodiment, step S200 further includes step S210:

[0074] In step S210 , a plurality of rotary support auxiliary hangers 21 are installed at the bottom of the rear beam 20 according to the rear beam design drawing.

[0075] Figure 8 Shown Figure 6The enlarged view of point III is a schematic diagram of the rotary support auxiliary hanging code 21. Figure 8 As shown, the rotary support auxiliary hanging code 21 is a single-hole hanging code, and the rotary support hanging code 15 and the rotary support auxiliary hanging code 21 correspond one to one.

[0076] Combine Figure 5 、 Figure 6 as well as Figure 8 There are two rotating support auxiliary hanging codes 21, and the two rotating support auxiliary hanging codes 21 are located below the upper crossbeam 60 on the sea side of the quay bridge, and are arranged axially symmetrically with the central axis of the rear beam 20.

[0077] refer to Figure 5 The axial distance between the pivot support auxiliary hanger 21 and the hinge point 22 of the rear beam 20 is L4. The value of L4 can be determined in conjunction with the position of the front beam 10 relative to the door frame structure 30 to ensure that the wire rope 92 connecting the pivot support hanger 15 and the pivot support auxiliary hanger 21 is in a vertical position under the action of gravity.

[0078] In one embodiment, step S300 further includes step S310:

[0079] In step S310 , a plurality of anti-stringing auxiliary hanging weights 51 are symmetrically provided on the two connecting beams 50 according to the connecting beam design drawing.

[0080] Figure 9 Shown Figure 7 The enlarged view of the IV in the middle is a schematic diagram of the anti-stringing auxiliary hanging code 51. Figure 8 As shown, the rotary support auxiliary hanging weight 21 is a single hole hanging weight. One anti-stringing hanging weight 16 corresponds to two anti-stringing auxiliary hanging weights 51.

[0081] like Figure 7 As shown, there are four anti-string auxiliary hanging weights 51 , and two connecting beams 50 are respectively provided with two anti-string auxiliary hanging weights 51 , and the anti-string auxiliary hanging weights 51 are provided relative to the land side lower beam 80 and close to the sea side lower beam 70 .

[0082] refer to Figure 7 The distance between the auxiliary anti-traffic hanging brackets 51 on the same connecting crossbeam 50 is L6; the distance between the auxiliary anti-traffic hanging brackets 51 on the same connecting crossbeam 50 closer to the landside lower crossbeam 80 and the landside lower crossbeam 80 is L5. The values ​​of L5 and L6 can be determined based on the position of the front beam 10, the position of the anti-traffic hanging brackets 16 on the front beam 10, and empirical values, and are not limited in this invention.

[0083] Figures 10 to 12 The state of completing step S400 and step S500 is shown. In one embodiment, step S400 further includes steps S410 to S420:

[0084] In step S410, a steel wire rope 92 is connected between the rotary support hanging weight 15 and the corresponding rotary support auxiliary hanging weight 21, and is tightened by a hand chain hoist 94. In this way, the two steel wire ropes 92 are in a certain stress state, such as Figure 10 shown.

[0085] In step S420, the wire rope 93 is connected between the anti-string hanging weight 16 and the corresponding anti-string auxiliary hanging weight 51, and is tightened by the hand chain hoist 95. In this way, the four wire ropes 93 are in a semi-pre-tightened state. Figure 11 shown.

[0086] In one embodiment, step S500 further includes steps S510 to S540:

[0087] In step S510, the floating crane 1 is deployed and parked directly in front of the front beam 10. The floating crane 1 of the present invention utilizes a double-hook system with both left and right hooks for lifting, and can be used with either a single or double hook. This allows the front beam 10 to be safely lifted using a small-tonnage double-hook floating crane 1 on-site, simplifying the lifting process.

[0088] In step S520 , the angle between the front beam 10 and the horizontal axis is obtained, and the hook 1 a of the floating crane 1 is moved to a position close to the sea side relative to the theoretical center of gravity of the front beam 10 according to the angle.

[0089] In such Figure 10 In the illustrated accident condition, the front beam 10 is tilted toward the sea, meaning it has rotated clockwise relative to the horizontal axis. Under this accident condition, if only the floating crane hook 1a is used for lifting, the front beam 10 will tend to rotate counterclockwise. The present invention utilizes a rotating support bracket 15 and a rotating support auxiliary bracket 21 to reduce or prevent vertical rotation of the front beam 10, minimizing the additional horizontal localized compression impact caused by the containers supporting the beam and preventing the collapse of containers after the beam is lifted, which could lead to a secondary accident.

[0090] In addition, in Figure 10 In the illustrated accident condition, as described in step S520, the hook 1a of the floating crane 1 is further seaward relative to the theoretical center of gravity of the front beam 10. The hook 1a and the swivel support auxiliary hook 21 function in conjunction with each other. If the hook 1a were positioned landward, the front beam 10 would tend to continue tilting clockwise, and the wire rope 92 connecting the swivel support hook 15 and the swivel support auxiliary hook 21 would be unable to control the direction of the front beam 10.

[0091] The vertical distance between the theoretical center of gravity of the hook 1a and the front beam 10 can be selected to be 1m, or other distances, which can be adjusted according to actual conditions on site and is not limited by the present invention.

[0092] In other accident conditions, the front beam 10 tilts toward the land side, and the position of the hook 1a and the design of the hanging code need to be adaptively changed (for example, the hook 1a is moved to a position close to the land side), which will not be described in detail in the present invention.

[0093] In step S530, the steel wire ropes 91 are connected between the hook 1a of the floating crane 1 and the lifting hooks 14 of the front beam 10. That is, four steel wire ropes 91 are installed between the hook 1a and the four lifting hooks 14.

[0094] In step S540 , the hook 1 a is lifted and controlled to move toward the land side. In step S540 , the stress state of the four steel wire ropes 91 connecting the hook head of the hook 1 a and the four lifting hooks 14 needs to be observed.

[0095] The four wire ropes 91 connecting the hook head 1a and the four lifting hooks 14 are divided into sea-side wire ropes 91a and land-side wire ropes 91b according to their locations. As the floating hook head 1a rises and slowly moves toward the land, the sea-side wire ropes 91a are first stressed, causing the front beam 10 to rotate around the wire ropes 92 on the beam hinge 13 side (i.e., the wire ropes 92 connecting the swivel support hooks 15 and the swivel support auxiliary hooks 21). After a certain rotation angle, the two land-side wire ropes 91b are stressed, and the front beam 10 is completely separated from the container on board. The wire ropes 92 on the beam hinge 13 side are eventually no longer stressed.

[0096] In one embodiment, step S600 further includes steps S610 to S620:

[0097] In step S610, when the steel wire rope 91 connecting the hook 1a and the lifting hook 14 is fully stressed, the front beam 10 is separated from the cargo ship 2, and the steel wire rope 92 connecting the rotating support hook 15 and the rotating support auxiliary hook 21 and the steel wire rope 93 connecting the anti-stringing hook 16 and the anti-stringing auxiliary hook 51 are removed.

[0098] In step S620, the hook 1a is controlled to be raised 1-2 meters upwards. When the hook 1a is controlled to continue to rise, it is necessary to ensure that it does not collide with the hull and the cargo on it during the lifting process.

[0099] Finally, in step S700, the front beam 10 is hoisted as a whole, placed at a designated location, and the remaining hoisting slings are removed.

[0100] Figure 16 Another embodiment of the method for hoisting the front girder 10 of the quay crane of the present invention is shown. Figure 16As shown, more specifically, the hoisting method of the quay crane front beam 10 of the present invention includes the following steps:

[0101] In step S10 , an empirical value of the theoretical center of gravity of the front beam 10 is obtained.

[0102] In step S20, according to the position of the theoretical center of gravity of the front beam 10, the front beam design drawing of the number and position of the lifting hooks 14, the rotating support hooks 15 and the anti-stringing hooks 16 of the front beam 10 is determined, the rear beam design drawing of the rear beam 20 of the quay crane and the rotating support auxiliary hooks 21 cooperating with the rotating support hooks 15 is determined, and the connecting beam design drawing of the connecting beam 50 of the quay crane and the anti-stringing auxiliary hooks 51 cooperating with the anti-stringing hooks 16 is determined.

[0103] In step S110 , a plurality of lifting brackets 14 and a plurality of rotating support brackets 15 are installed on the top 11 of the front beam 10 according to the front beam design drawing.

[0104] In step S120 , a plurality of anti-stringing hanging brackets 16 are installed on the side surface 12 of the front beam 10 according to the front beam design drawing.

[0105] In step S210 , a plurality of rotary support auxiliary hangers 21 are installed at the bottom of the rear beam 20 according to the rear beam design drawing.

[0106] In step S310 , a plurality of anti-stringing auxiliary hanging weights 51 are symmetrically provided on the two connecting beams 50 according to the connecting beam design drawing.

[0107] In step S410 , a steel wire rope 92 is connected between the rotary support hanging weight 15 and the corresponding rotary support auxiliary hanging weight 21 , and is tightened using a hand winch 94 .

[0108] In step S420 , a steel wire rope 93 is connected between the anti-stringing hanging weight 16 and the corresponding anti-stringing auxiliary hanging weight 51 , and is tightened using a hand winch 95 .

[0109] In step S510 , the floating crane 1 is arranged and stopped right in front of the front beam 10 .

[0110] In step S520 , the angle between the front beam 10 and the horizontal axis is obtained, and the hook 1 a of the floating crane 1 is moved to a position close to the theoretical center of gravity of the front beam 10 according to the angle.

[0111] In step S530, the wire rope 91 is connected between the hook 1a of the floating crane 1 and the lifting hook 14 of the front beam 10. In S410, S420 and S530, the wire rope is connected to the lifting hook through the shackle 96, as shown in FIG. Figure 10 and Figure 12 as shown for a secure connection.

[0112] In step S540, the hook 1a is lifted and controlled to move toward the land side.

[0113] In step S610, when the steel wire rope 91 connecting the hook 1a and the lifting hook 14 is fully stressed, the front beam 10 is separated from the cargo ship 2, and the steel wire rope 92 connecting the rotating support hook 15 and the rotating support auxiliary hook 21 and the steel wire rope 93 connecting the anti-stringing hook 16 and the anti-stringing auxiliary hook 51 are removed.

[0114] In step S620, the hook 1a is controlled to be raised 1-2 meters upward.

[0115] In step S700, the front beam 10 is hoisted as a whole to a designated position, and the connection between the hoisting hook 14 and the hook 1a is disconnected.

[0116] The hoisting method of the present invention adopts the design concept of using the original door frame and rear beam 20 structure as the lifting fixed + rotation support point. This hoisting solution meets the following requirements:

[0117] (1) The small-tonnage double-hook floating crane 1 on site can safely lift the beam assembly structure.

[0118] (2) The estimated deviation of the center of gravity of the applicable beam is within 1m, and no string movement will occur during lifting.

[0119] (3) Reduce the additional horizontal local compression impact caused by the containers supporting the beam, and avoid the collapse of the containers after the beam is lifted, which may cause a secondary accident.

[0120] Although the present invention is disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modifications, equivalent variations, and modifications made to the above embodiments in accordance with the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection defined by the claims of the present invention.

Claims

1. A method for hoisting a front girder of a quay crane, applicable to an accident situation where the front girder is broken at a hinge point and is stranded on a seaside cargo ship; In the accident condition, the central axis of the front beam is tilted relative to the horizontal axis; It is characterized by: The hoisting method includes: Installing a lifting hook, a rotating support hook and an anti-stringing hook on the front beam; A rotary support auxiliary hanging weight is installed on the rear beam of the quay crane and cooperates with the rotary support hanging weight; An anti-stringing auxiliary hanging weight is installed on the connecting crossbeam of the quay crane and cooperates with the anti-stringing hanging weight; Connect the rotating support hanging weight and the rotating support auxiliary hanging weight, and connect the anti-string hanging weight and the anti-string auxiliary hanging weight; Connecting a hook of a floating crane and the lifting hook of the front beam, and using the hook to lift the front beam; When the front beam is separated from the cargo ship, the connection between the rotary support hanging hook and the rotary support auxiliary hanging hook and the connection between the anti-stringing hanging hook and the anti-stringing auxiliary hanging hook are disconnected; The front beam is hoisted as a whole to a designated position, and the connection between the hoisting hook and the hoisting bracket is disconnected.

2. The hoisting method according to claim 1, wherein: Before installing the lifting hook, the rotating support hook and the anti-stringing hook on the front beam, the lifting method further includes: Obtaining an empirical value of the theoretical center of gravity of the front beam; A front beam design drawing determining the number and position of the lifting hooks, rotating support hooks, and anti-stringing hooks of the front beam according to the position of the theoretical center of gravity of the front beam; Determine the design drawings of the rear beam of the quay crane and the rear beam of the swivel support auxiliary hanging bracket that cooperates with the swivel support hanging bracket; Determine the design drawings of the connecting beams of the quay crane and the connecting beams of the anti-stringing auxiliary hanging hooks that cooperate with the anti-stringing hanging hooks.

3. The hoisting method according to claim 2, wherein: The installation of the lifting hook, the rotating support hook and the anti-stringing hook on the front beam includes: According to the front beam design drawing, multiple lifting brackets and multiple rotating support brackets are installed on the top of the front beam; According to the front beam design drawing, multiple anti-stringing hanging codes are installed on the side of the front beam.

4. The hoisting method according to claim 3, characterized in that: The number of the lifting hooks is four, and the four lifting hooks are symmetrically arranged with the central axis of the front beam as the axis; and / or The number of the rotating support hanging brackets is two, and the two rotating support hanging brackets are close to the hinge point of the front beam relative to the lifting bracket and are symmetrically arranged with respect to the central axis of the front beam; and / or The number of the anti-string hanging codes is two, and the two anti-string hanging codes are located at the hinge point of the front beam and are respectively arranged on the two side surfaces of the front beam.

5. The hoisting method according to claim 4, characterized in that: The lifting hook and the rotating support hook are both single-hole hooks, and the anti-stringing hook is a double-hole hook.

6. The hoisting method according to claim 2, wherein: The swivel support auxiliary hanging bracket installed on the rear beam of the quay crane and cooperating with the swivel support hanging bracket includes: According to the rear beam design drawing, a plurality of the rotary support auxiliary hanging brackets are installed at the bottom of the rear beam.

7. The hoisting method according to claim 6, wherein: The number of the rotary support auxiliary hanging brackets is two, and the two rotary support auxiliary hanging brackets are located below the upper cross beam on the sea side of the quay crane and are symmetrically arranged with the central axis of the rear beam as the axis.

8. The hoisting method according to claim 2, wherein: The anti-stringing auxiliary hanging weight installed on the connecting crossbeam of the quay crane and cooperating with the anti-stringing hanging weight includes: According to the design drawing of the connecting beam, a plurality of the anti-stringing auxiliary hanging codes are symmetrically arranged on the two connecting beams.

9. The hoisting method according to claim 8, characterized in that: There are four anti-string auxiliary hanging weights, and two of the two connecting beams are respectively provided with two anti-string auxiliary hanging weights, and the anti-string auxiliary hanging weights are arranged relative to the land side lower beam and close to the sea side lower beam.

10. The hoisting method according to claim 2, wherein: The method of connecting the rotating support hanging weight and the rotating support auxiliary hanging weight, and connecting the anti-string hanging weight and the anti-string auxiliary hanging weight, comprises: Connect a steel wire rope between the rotating support hanging weight and the corresponding rotating support auxiliary hanging weight, and tighten it with a hand chain hoist; A steel wire rope is connected between the anti-string hanging weight and the corresponding anti-string auxiliary hanging weight, and is tightened by a hand hoist.

11. The hoisting method according to any one of claims 2 to 10, characterized in that: The method of connecting the hook of the floating crane and the lifting hook of the front beam and using the hook to lift the front beam comprises: Arranging a floating crane and parking the floating crane just in front of the front beam; obtaining an angle between the front beam and the horizontal axis, and moving the hook of the floating crane to a position close to the sea side relative to the theoretical center of gravity of the front beam according to the angle; Connecting a steel wire rope between the hook of the floating crane and the lifting hook of the front beam; The hook is lifted and controlled to move toward the land side.

12. The hoisting method according to claim 11, wherein: When the front beam is separated from the cargo ship, disconnecting the connection between the rotary support hanging hook and the rotary support auxiliary hanging hook and disconnecting the connection between the anti-stringing hanging hook and the anti-stringing auxiliary hanging hook comprises: When the steel wire rope connecting the hook and the lifting hook is fully stressed, the front beam is separated from the cargo ship, and the steel wire rope connecting the rotating support hook and the rotating support auxiliary hook and the steel wire rope connecting the anti-stringing hook and the anti-stringing auxiliary hook are removed; The hook is controlled to rise 1-2 m upward.

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