Method for hoisting front girder of quay crane

Abstract

The invention provides a hoisting method for a front girder of a quay crane. The hoisting method comprises the step of installing a hoisting hanger, a rotary supporting hanger and an anti-string hanger on the front girder. And a rotary supporting auxiliary suspension fitting matched with the rotary supporting suspension fitting is mounted on a rear girder of the quay crane. And an anti-string auxiliary suspension fitting matched with the anti-string suspension fitting is mounted on a connection cross beam of the quay crane. And connecting the rotary supporting hanger with the rotary supporting auxiliary hanger, and connecting the anti-string hanger with the anti-string auxiliary hanger. And connecting a lifting hook of the floating crane and a hoisting hanger of the front girder, and lifting the front girder by using the lifting hook. And when the front girder is separated from the cargo ship, the connection between the rotary bearing hanging weights and the rotary bearing auxiliary hanging weights and the connection between the anti-string hanging weights and the anti-string auxiliary hanging weights are disconnected. And the front girder is integrally hoisted to a designated position, and the hoisting hanger and the hoisting hook are disconnected. According to the hoisting method, movement in all directions generated in the hoisting process of the front crossbeam can be reduced.

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 the unloading operation of the container terminal quay crane, due to the old structure of the quay crane, the front beam of the quay crane broke due to the front tie rod, and the front beam of the quay crane broke at the hinge point due to instability. The front beam of the quay crane fell as a whole and hit the container ship that was unloading. The front beam was placed on the container of the cargo ship and was in an extremely unstable state. During the lifting process of the beam, the container pressed under the beam may collapse further due to impact or other forces.

[0003] The conventional method of front beam hoisting is basically to use double hook or four hook floating hoisting method. Specifically: first calculate the center of gravity of the front beam, weld 4 process hoists on the left and right side panels of the beam; then hoist the beam on the side of the beam with floating hoist.

[0004] However, in view of the on-site construction conditions, the above conventional construction methods have the following problems: Since the beam was pressed on the container ship before the accident, the floating crane could not lift it by leaning on the side of the front beam. The design time of the accident quay crane was a long time ago, and its weight and center of gravity are difficult to calculate accurately. When the accident beam 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 synchronously lift upward as a whole. The asynchrony of the four lifting points will cause additional local extrusion and impact in uncertain directions on the container supporting the beam, resulting in the collapse of the container after the beam is lifted, causing a secondary accident. This will cause the front beam to shake during the lifting and transportation process, which will affect the safety of 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] One aspect of the present invention provides a method for lifting a front beam of a quay crane, which is applied to an accident condition in which a hinge of the front beam is broken and the front beam is laid on a seaside cargo ship; in the accident condition, the central axis of the front beam is inclined relative to the horizontal axis; the lifting method comprises: 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 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 connection between the rotating support hook and the rotating support auxiliary hook and the connection between the anti-stringing hook and the anti-stringing auxiliary hook; lifting the front beam as a whole to a designated position, and disconnecting the connection between 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 also 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 positions 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 a lifting hook, a rotating support hook and an anti-stringing hook on the front beam includes: installing a plurality of the lifting hooks and a plurality of the rotating support hooks on the top of the front beam according to the design drawing of the front beam; and installing a plurality of the anti-stringing hooks on the side of the front beam according to the design drawing of the front beam.

[0009] In one embodiment, 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 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 symmetrically arranged with the central axis of the front beam as the axis; 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 swivel support auxiliary hanger installed on the rear beam of the quay crane and cooperating with the swivel support hanger includes: according to the design drawing of the rear beam, a plurality of the swivel support auxiliary hangers are installed at the bottom of the rear beam.

[0012] In one embodiment, the number of the rotatable support auxiliary hanging weights is two, and the two rotatable support auxiliary hanging weights 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.

[0013] In one embodiment, the anti-string auxiliary hanging weight installed on the connecting beam of the quay crane and cooperating 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 of the 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.

[0015] In one embodiment, the connection between the rotating support hanging weight and the rotating support auxiliary hanging weight, and the connection between the anti-string hanging weight and the anti-string auxiliary hanging weight include: 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 and the lifting hook of the front beam are connected, and the front beam is lifted by the hook, including: arranging the floating crane and stopping the floating crane just 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 hanging weight and the rotating support auxiliary hanging weight and the connection between the anti-string hanging weight and the anti-string auxiliary hanging weight are disconnected, including: when the steel wire rope connecting the hook and the lifting hanging weight is fully stressed, the front beam is detached from the cargo ship, and the steel wire rope connecting the rotating support hanging weight and the rotating support auxiliary hanging weight and the steel wire rope connecting the anti-string hanging weight and the anti-string auxiliary hanging weight are removed; 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 rotating support auxiliary lifting code as well as the mutually connected anti-stringing lifting code and anti-stringing auxiliary lifting code can reduce the stringing movement in all directions during the hoisting process of the front beam, ensure that the beam is safely and smoothly 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 the occurrence of 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 It is a flow chart of an embodiment of a method for hoisting a front beam of a quay crane according to the present invention;

[0021] Figure 2 yes Figure 1 The schematic diagram of the lifting code of 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 The enlarged view of the middle II;

[0024] Figure 5 yes Figure 1 The rear beam design drawing and the lifting code 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 beam and the lower beam shown;

[0027] Figure 8 yes Figure 6 The enlarged view of the middle part Ⅲ;

[0028] Fig. 9 yes Figure 7 The enlarged view of the middle IV;

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

[0030] Fig.11 yes Fig.10 Top view of;

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

[0032] Fig.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] Fig.14 yes Fig.13 Top view of;

[0034] Fig.15 yes Figure 1 A schematic diagram of disconnecting the connection between the rotating support hanging bracket and the rotating support auxiliary hanging bracket and the connection between the anti-string hanging bracket and the anti-string auxiliary hanging bracket in step S600 of the hanging method shown;

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

[0036] During the unloading operation of the container terminal quay crane, due to the old structure of the quay crane, the front beam of the quay crane broke due to the front tie rod, and the front beam of the quay crane broke at the hinge point due to instability. The front beam of the quay crane fell as a whole and hit the container ship that was unloading. The front beam was placed on the container of the cargo ship and was in an extremely unstable state. During the lifting process of the beam, the container pressed under the beam may collapse further due to impact or other forces.

[0037] The conventional method of front beam hoisting is basically to use double hook or four hook floating hoisting method. Specifically: first calculate the center of gravity of the front beam, weld 4 process hoists on the left and right side panels of the beam; then hoist the beam on the side of the beam with floating hoist.

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

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

[0040] 2. Because the beam was pressed on the container ship before the accident, the floating crane could not lift 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 was subsequently remodeled and upgraded many times. The weight and center of gravity of the beam components are difficult to calculate accurately. When the beam involved in the accident was lifted, the actual structural center of gravity of the beam deviated from the calculated center of gravity, resulting in displacement in the front, back, left and right directions during the lifting process.

[0042] 4. The front beam is in a non-horizontal state. During the lifting process, the beam cannot move synchronously upward as a whole. 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, thus 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, a feature illustrated 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 these modifications and variations 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 the accident condition in which the front beam is broken and laid on the 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 front tie rod, and the front beam of the quay crane is broken at the unstable hinge point, and the front beam of the quay crane falls as a whole 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 impact or other forces. Specifically, the central axis of the front beam in the accident condition is inclined relative to the horizontal axis.

[0045] Figure 1 The flowchart of an 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 swivel support auxiliary hanging weight that cooperates with the swivel 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 and the lifting hook of the front beam are connected, and the front beam is lifted by the hook.

[0051] In step S600, when the front beam is detached from the cargo ship, the connection between the rotating support hanging weight and the rotating support auxiliary hanging weight and the connection between the anti-string hanging weight and the anti-string auxiliary hanging weight are disconnected.

[0052] In step S700, 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.

[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 rotating support auxiliary lifting code as well as the mutually connected anti-stringing lifting code and anti-stringing auxiliary lifting code can reduce the stringing movement in all directions during the hoisting process of the front beam, ensure that the beam is safely and smoothly 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 the occurrence of 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 located at the root of the front beam 10. Under normal working conditions, the front beam 10 is connected to the rear beam 20 through the hinge 13. However, in an accident condition, the front beam 10 loses stability and breaks at the hinge 13, causing the front beam 10 to fall as a whole and hit the container ship that is unloading.

[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 matched 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 matched 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] There are four lifting brackets 14, and the four lifting brackets 14 are symmetrically arranged about 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 field experience, and the present invention does not limit it.

[0063] The rotation support hanging bracket 15 is used as the support point for the hoisting rotation, and the number of the hanging brackets is two. The arrangement positions of the two rotation support hanging brackets 15 are 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 13 is L1. L2 can be determined based on on-site experience, and the present invention does not limit it; the value of L1 needs to consider the relative position between the front beam 10 and the door frame structure 30, and try to make 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 hangers 15 are located at the hinge point 13 of the front beam 10 relative to the lifting hangers 14, that is, at the root of the front beam 10; and the two rotating support hangers 15 are axially symmetrically arranged with the central axis of the front beam 10.

[0065] Figure 3 Shows Figure 2 The enlarged view at 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 rotating support bracket 15 is a single hole 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-travel hanging codes 16 are installed on the side 12 of the front beam 10. The anti-travel hanging codes 16 can control the front beam 10 from moving forward, backward, left, and right.

[0070] There are two anti-stringing hanging codes 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 FIG. 1 shows a schematic diagram of an anti-string hanging code 16. 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 partial structure of the quay crane is shown, including the rear beam 20, the door frame structure 30, the diagonal bracing pipe 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 swivel support auxiliary hangers 21 are installed at the bottom of the rear beam 20 according to the rear beam design drawing.

[0075] Figure 8 Shows Figure 6The enlarged view at point III is a schematic diagram of the swivel support auxiliary hanging bracket 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] Combination 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 cross beam 60 on the sea side of the quay crane, and are arranged axially symmetrically with the central axis of the rear beam 20.

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

[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 arranged on the two connecting beams 50 according to the connecting beam design drawing.

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

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

[0082] refer to Figure 7 , the distance between the anti-string auxiliary hanging weights 51 arranged on the same connecting crossbeam 50 is L6; the distance between the anti-string auxiliary hanging weights 51 closer to the land side lower crossbeam 80 and the land side lower crossbeam 80 on the same connecting crossbeam 50 is L5. The values ​​of L5 and L6 can be determined according to the position of the front beam 10, the position of the anti-string hanging weights 16 on the front beam 10 and the empirical value, and the present invention is not limited thereto.

[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 rotating support hanging weight 15 and the corresponding rotating 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 Fig.10 shown.

[0085] In step S420, the 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 by a hand chain hoist 95. In this way, the four steel wire ropes 93 are in a semi-pretightened state, such as Fig.11 shown.

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

[0087] In step S510, the floating crane 1 is arranged and stopped in front of the front beam 10. The floating crane 1 in the present invention adopts double hooks of left and right hooks for lifting, and can be lifted by single hook or double hooks. In this way, the front beam 10 can be safely lifted by using the small-tonnage double-hook floating crane 1 on site, and the lifting process is simple.

[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 Fig.10 In the accident condition shown, the front beam 10 is in a state of tilting toward the sea side, that is, the front beam 10 is in a state of rotating clockwise relative to the horizontal axis. In this accident condition, if only the hook 1a of the floating crane is used for lifting, the front beam 10 has a tendency to rotate counterclockwise. In the present invention, the design of the rotating support hanging weight 15 and the rotating support auxiliary hanging weight 21 can reduce or prevent the rotation of the front beam 10 in the vertical plane, reduce the additional horizontal local extrusion impact caused by the container supporting the beam, and avoid the collapse of the container after the beam is lifted, causing a secondary accident.

[0090] In addition, in Fig.10 In the accident condition shown, as described in step S520, the hook 1a of the floating crane 1 is more biased toward the sea side relative to the theoretical center of gravity of the front beam 10. The hook 1a and the swivel support auxiliary lifting weight 21 play a role of cooperation. If the hook 1a is arranged at a position biased toward the land side, the front beam 10 has a tendency to continue to tilt in the clockwise direction, and at this time, the wire rope 92 connecting the swivel support lifting weight 15 and the swivel support auxiliary lifting weight 21 cannot play a role in controlling 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 1 m, or other distances, and can be adjusted according to actual site conditions, and the present invention is not limited thereto.

[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 elaborated in the present invention.

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

[0094] In step S540, the hook 1a 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 1a and the four lifting hooks 14 needs to be observed.

[0095] The four steel wires 91 connecting the hook 1a and the four lifting hooks 14 are divided into sea-side steel wires 91a and land-side steel wires 91b according to their positions. In the process of the floating hook 1a head rising and slowly moving toward the land side, the sea-side steel wires 91a are first stressed, and the front beam 10 rotates around the steel wires 92 on the beam hinge 13 side (i.e., the steel wires 92 connecting the rotating support hook 15 and the rotating support auxiliary hook 21). After rotating to a certain angle, the two land-side steel wires 91b are stressed, the front beam 10 is completely separated from the container on the ship, and the steel wires 92 on the beam hinge 13 side are finally 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. In the process of controlling the hook 1a to continue to rise, it is necessary to ensure that the hook 1a 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] Fig.16 Another embodiment of the method for hoisting the front beam 10 of the quay crane of the present invention is shown. Fig.16As shown, more specifically, the hoisting method of the front beam 10 of the quay crane of the present invention comprises the following steps:

[0101] In step S10 , the theoretical center of gravity empirical value 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 matched 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 matched 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 tags 16 are installed on the side 12 of the front beam 10 according to the front beam design drawing.

[0105] In step S210 , a plurality of swivel 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 arranged 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 by 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 just 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, a steel wire rope 91 is connected between the hook 1a of the floating crane 1 and the lifting bracket 14 of the front beam 10. In S410, S420 and S530, the steel wire rope is connected to the bracket via a shackle 96, as shown in FIG. Fig.10 and Fig.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 upward by 1-2 m.

[0115] In step S700, the front beam 10 is hoisted and moved 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 idea of ​​using the original door frame and rear beam 20 structure as the hoisting fixed + rotating support point. This hoisting scheme 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 as above with preferred embodiments, it 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 modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A method for hoisting a front beam of a quay crane, which is applied to an accident condition in which the 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 inclined relative to the horizontal axis; It is characterized in that The hoisting method comprises: Install a lifting hook, a rotating support hook and an anti-stringing hook on the front beam; A swivel support auxiliary hanging weight matched with the swivel support hanging weight is installed on the rear beam of the quay crane; An anti-stringing auxiliary hanging weight coordinated with the anti-stringing hanging weight is installed on the connecting crossbeam of the quay crane; 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 rotating support hanging weight and the rotating support auxiliary hanging weight and the connection between the anti-string hanging weight and the anti-string auxiliary hanging weight 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, characterized in that: Before installing the lifting bracket, the rotating support bracket and the anti-stringing bracket 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 for 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 matched 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, characterized in that: The installation of the lifting bracket, the rotating support bracket and the anti-stringing bracket on the front beam includes: According to the design drawing of the front beam, a plurality of the lifting brackets and a plurality of the rotating support brackets are installed on the top of the front beam; According to the design drawing of the front beam, a plurality of 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 hangers is two, and the two rotating support hangers are located near the hinge point of the front beam relative to the lifting hanger and are symmetrically arranged with the central axis of the front beam as the axis; 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, characterized in that: The swivel support auxiliary hanging bracket installed on the rear beam of the quay crane and cooperating with the swivel support hanging bracket comprises: According to the design drawing of the rear beam, a plurality of the rotating support auxiliary hanging brackets are installed at the bottom of the rear beam.

7. The hoisting method according to claim 6, characterized in that: The number of the rotating support auxiliary hanging weights is two, and the two rotating support auxiliary hanging weights 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, characterized in that: The anti-stringing auxiliary hanging weight installed on the connecting crossbeam of the quay crane and cooperating with the anti-stringing hanging weight comprises: 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, characterized in that: 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 bracket and the corresponding rotating support auxiliary hanging bracket, and tighten it with a hand chain hoist; A steel wire rope is connected between the anti-stringing hanging weight and the corresponding anti-stringing auxiliary hanging weight, and is tightened by a hand winch.

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; Acquire the angle between the front beam and the horizontal axis, and move 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, characterized in that: When the front beam is separated from the cargo ship, disconnecting the connection between the rotating support hanging bracket and the rotating support auxiliary hanging bracket and disconnecting the connection between the anti-string hanging bracket and the anti-string auxiliary hanging bracket 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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