WO2012167503A1

WO2012167503A1 - Tower crane mast and tower crane containing the tower crane mast

Info

Publication number: WO2012167503A1
Application number: PCT/CN2011/078301
Authority: WO
Inventors: 朱斌; 朱守寨
Original assignee: 长沙中联重工科技发展股份有限公司; 湖南中联重科专用车有限责任公司
Priority date: 2011-06-10
Filing date: 2011-08-11
Publication date: 2012-12-13
Also published as: CN102275839A

Abstract

Disclosed are a tower crane mast and a tower crane containing the tower crane mast. The tower crane mast comprises: a cuboid frame formed of four main chords (A, B, C, D) and a main beam (30); a first elevation mechanism (10) disposed between two main chords (A, B) at one side of the cuboid frame. The four main chords (A, B, C, D) and the main beam (30) are connected in a separable and detachable manner. The tower crane mast can be detached into separate chord or beam structures during transportation, which facilitates installation and placement and effective use of space, so as to reduce unnecessary space occupation and lower the transportation cost.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of lifting equipment, and in particular to a tower crane climbing frame and a tower crane including the tower crane climbing frame. BACKGROUND OF THE INVENTION Existing climbing frames generally have a single-side jacking structure, mainly because the upper load is small when the climbing frame is jacked up, and the one-side jacking is sufficient to meet the use requirements, and the climbing action of the climbing frame can be realized. In addition, the existing climbing frame is either integral or detachable, but the degree of detachability is different. Generally, it can only be disassembled into a K-shaped piece, which requires more space during transportation and is placed. inconvenient. For the super large jib tower crane, because of its large lifting torque, the height and width of the standard section are required to be large. When designing the climbing frame, the height of the entire rectangular frame structure is adapted to the standard section. The width and the width are very large, resulting in a large space occupied during transportation, which cannot meet the dimensional requirements of container transportation. Moreover, due to the integral structure of the climbing frame, the assembly during transportation is also very inconvenient, and the space cannot be effectively utilized. , resulting in increased transportation costs. SUMMARY OF THE INVENTION The present invention is directed to a tower crane climbing frame and a tower crane including the tower crane climbing frame, which can disassemble the climbing frame into a separate rod or beam structure during transportation, which is convenient for installation and can be effectively utilized. Space, reduce unnecessary space occupation and reduce transportation costs. In order to achieve the above object, according to an aspect of the present invention, a tower crane climbing frame is provided, comprising: four main chords arranged in parallel with each other; main beams are respectively disposed at two ends of the four main chords and fixed Connecting four main chords, four main chords and a main beam extending around the square body frame; the first jacking mechanism is disposed between the two main chords on one side, including the first jacking beam and the first top The lift cylinder is separately detachably connected between the four main chords and the main beam. Further, the tower crane includes a second jacking mechanism disposed between the two main chords on the other side with respect to the first jacking mechanism, including a second jacking beam and a second jacking cylinder, A synchronous jacking control device is disposed between the second jacking cylinder and the first jacking cylinder. Further, the tower crane includes a plurality of cross beams and a diagonal web, and is separately detachably disposed between the four main chords and the main beam to connect and support the four main chords and the main beam. Further, the second jacking beam is detachably disposed between the two main chords, and a second jacking cylinder is hinged below the second jacking beam, and the telescopic end of the second jacking cylinder is movably disposed The second lifting bottom beam. Further, two oblique webs are hinged below the second jacking beam, and the other ends of the two diagonal webs are respectively hinged on the two main chords on the other side. Further, the four main chords are each formed by two short main chords fixed by bolts. Further, a connecting flange is fixedly disposed at a connecting end of the two short main chords, and the bolt is disposed on the connecting flange, and a reinforcing rib is further disposed between the connecting flange and the short main chord. Further, an overhanging beam is fixedly coupled to the outside of the two main chords and/or the two main chords. Further, the outrigger is detachably coupled to the two main chords and/or the two main chords. According to another aspect of the present invention, there is provided a tower crane comprising a mounted standard section, a standard section to be installed, and a lower support disposed above the installed standard section, and the tower crane climbing frame, the tower crane The climber is located between the installed standard section and the lower support and is placed over the installed standard section. According to the technical solution of the present invention, the tower crane includes four main chords and a rectangular parallelepiped frame surrounded by the main beam, and a first jacking mechanism is disposed on one side of the rectangular parallelepiped frame, including the first jacking beam and the first top The lift cylinder, the four main chords and the main beam are separately detachably connected, so that the entire climbing frame can be disassembled into a separate beam and rod structure, which is convenient for installation and disassembly, can be bundled and transported, and effectively saves installation and transportation costs. . A second jacking mechanism is further disposed on the opposite side of the first jacking mechanism, including a second jacking beam and a second jacking cylinder. The double-side jacking mechanism reduces the unevenness of the overall structure of the large-sized boom tower crane climbing frame, and ensures uniform force. When the tower crane is lifted and added, the entire climbing frame structure is balanced, and there is no one-sided The factors that change the force greatly reduce the influence on the fatigue strength of the overall steel structure, and improve the structural strength and work performance of the tower crane. The main chords are fixed by the short main chords through high-strength bolts, which can effectively extend the overall length of the climbing frame to meet the standard installation requirements without affecting the convenience of transportation after the main chord is disassembled. An outrigger is connected to the outer side of the main chord of the installation jacking mechanism to further improve the connection strength of the tower crane and ensure the stability and safety of the jacking mechanism. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in FIG. In the drawing: 1 is a perspective view showing the structure of a tower crane according to an embodiment of the present invention; FIG. 2 is a schematic view showing the structure of a main chord of a tower crane according to an embodiment of the present invention; Schematic diagram of a side single-piece climbing frame in which a first jacking mechanism of a tower crane is located according to an embodiment of the present invention; FIG. 4 shows a second jacking mechanism of a tower crane according to an embodiment of the present invention. 5 is a schematic exploded view of a tower crane according to an embodiment of the present invention; FIG. 6 shows a first jacking mechanism and a second top of a tower crane according to an embodiment of the present invention. FIG. 7 is a schematic view showing the mounting structure of the overhanging beam of the tower crane according to the embodiment of the present invention; and FIG. 8 is a diagram showing the synchronization of the tower crane according to the embodiment of the present invention. Lifting control device hydraulic schematic. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. As shown in FIGS. 1 to 8, according to an embodiment of the present invention, a tower crane includes four main chords A, B, C, D and eight main beams 30 arranged in parallel with each other, and the main beam 30 is divided into two groups. , each group of four, respectively set at the four main chords A, B, C, D, and fixedly connected four main chords A, B, C, D, four main chords A, B, C , D and eight main beams 30 surround the square frame. The four main chords A, B, C, and D are fixedly provided with a plurality of ear plates with pin holes, which are convenient for connection during assembly of the tower crane, and other components are disposed through the pin shaft. Four main chords A, B, C, D and eight main beams 30. a first jacking mechanism 10 is disposed between the two main chords on one side of the rectangular parallelepiped frame, and the first jacking mechanism 10 includes a first jacking beam 11 and a first jacking cylinder 12, first The two ends of the jacking beam 11 are connected with two main chords Β, ,, and an ear plate with a pin hole is arranged at an intermediate portion and both sides of the lower side of the first jacking beam 11, and the first jacking cylinder 12 is hinged at The ear plate on the lower middle portion of the first lifting beam 11 is connected by a pin. A first jacking bottom beam is disposed at a lower end of the first jacking cylinder 12, and the first jacking bottom beam is movably disposed at an end of the first jacking cylinder 12 and follows the lower end of the first jacking cylinder 12 Telescopic movement and movement. A second jacking mechanism 20 is disposed on the rectangular parallelepiped frame on the opposite side of the first jacking mechanism 10, and the second jacking mechanism 20 is disposed between the two main chords C, D, including the second jacking beam 21 And a second jacking cylinder 22. First The two jacking beams 21 are detachably disposed between the two main chords C, D, and the second jacking cylinder 22 is hinged below the second jacking beam 21, and is movable at the telescopic end of the second jacking cylinder 22. A second jacking bottom beam 23 is provided, and the second jacking bottom beam 23 follows the action of the telescopic end of the second jacking cylinder 22. The first jacking bottom beam and the second jacking bottom beam 23 are both wing-like structures, which can make the jacking bottom beam have stronger supporting strength and improve the performance of the jacking mechanism. A synchronous jacking control device is disposed between the first jacking mechanism 10 and the second jacking mechanism 20, which can ensure that the double jacking mechanism is always synchronized during the jacking process, thereby having a good balance and preventing the jacking In the process, the problem of excessive torque caused by the unbalance of the jacking increases the working stability and reliability of the jacking mechanism. Referring to FIG. 8, the synchronous jacking control device includes a balancing valve 71 connected to the rodless chambers of the two jacking cylinders of the first jacking mechanism 10 and the second jacking mechanism 20, respectively, and the balancing valve 71 includes a one-way valve and A relief valve in parallel with the check valve. Two balancing valves 71 are arranged in parallel on a hydraulic line of the synchronous jacking control. The rod chambers of the two jacking cylinders are connected together by another hydraulic line. The synchronous jacking control also includes a three-position six-way valve to control the flow of the hydraulic circuit. A plurality of cross beams 40 and inclined webs 50 are disposed between the four main chords A, B, C, D and the eight main beams 30, and the plurality of cross beams 40 and the inclined webs 50 are respectively disposed in each of the rectangular parallelepiped frames In part, four main chords A, B, C, D and eight main beams 30 are connected and supported, and a first jacking mechanism 10 and a second jacking mechanism 20. Preferably, the various parts of the tower crane, including the main chords A, B, C, D and the main beam 30, as well as the plurality of beams 40 and the inclined web 50, can be disassembled into separate beams or rod structures, Disassemble each component into a minimum installation unit for easy disassembly and transportation, which can effectively reduce space occupation and reduce transportation costs. The beam 40 is a small rectangular box-shaped structure with pin holes at both ends, which is convenient to cooperate with the ear plate with the pin hole on the main chord, and is connected by the pin shaft. The structure is simple, convenient to use, easy to assemble and disassemble, and more The beams 40 have different sizes depending on the set position. An ear plate with a pin hole is further disposed below the second jacking beam 21, and two inclined webs 50 are hinged on the ear plate through the pin shaft, and the other ends of the two inclined webs 50 are respectively hinged through the pin shaft On the two main chords C, D, thereby having a detachable structure, and capable of forming an effective support for the second jacking mechanism 20, the support strength of the second jacking mechanism 20 is improved. The first jacking mechanism 10 has a similar structure to the second jacking mechanism 20. There is an installation space between the upper cross member 21 of the second jacking mechanism 20 and the main cross member 30 at the upper end, and the cross member 40 and the diagonal web 50 are not disposed in the rectangular frame within the installation space, so as to be a standard section. It is installed from the outside into the tower crane to make room for installation. A plurality of beams 40 and a diagonal web 50 are hinged between the first jacking beam 11 of the first jacking mechanism 10, the main beam 30 above it, and the main chords Β, Β, to the main chord The connection structure between the 顶 and 和 and the structural strength of the first jacking mechanism 10 are well enhanced. In the rectangular frame on both sides of the two jacking mechanisms, a plurality of detachable beams 40 and inclined webs 50 are also provided, which further strengthens the connection and support strength of the entire tower crane and improves the structural stability thereof. At the upper end of the tower crane, there is a joint connected with the lower base of the tower crane, and a roller bracket is arranged at the lower end portion and the middle portion of the tower crane, and a roller structure is arranged thereon, and the climbing process of the tower crane is carried out. In the middle, the guiding mechanism of the tower crane is guided, and at the same time, the friction force between the climbing frame and the standard section can be reduced, and the lifting resistance is reduced. In this embodiment, the four main chords A, B, C, and D are respectively fixed by two short main chords by bolts, and the connecting flanges are fixedly disposed at the connecting ends of the two short main chords. 32. The bolt is arranged on the connecting flange 32, and the two short main chords are fixedly connected together. When transporting, the two main chords can be disassembled and turned into two short main chords, which is more convenient for installation and placement. , effectively preventing the inconvenience caused by the excessive length of the main chord. When the two short main chords are connected together, the length of the main chord can be lengthened, so that the tower crane has sufficient length and space to install the standard section to be installed. A reinforcing rib 33 is disposed between the connecting flange 32 and the short main chord, and the reinforcing rib 33 has a triangular plate-like structure, further strengthening the connection between the connecting flange 32 and the short main chord, and improving the support of the connecting flange 32. Strength, enhancing the stability of the main chord. Preferably, the bolt is a high strength bolt 31, and more preferably, the high strength bolt 31 is a friction type high strength bolt. The friction type high-strength bolt can further enhance the cooperation between the connecting flanges 32, reduce the possibility of relative displacement between the connecting flanges 32, and improve the structural strength and stability between the two short main chords. Preferably, in the present embodiment, the outer side of the two main chords Β, Β and/or the two main chords C, D are fixedly connected with an overhanging beam 60, and the outer protruding beam 60 and the main chord are Disassemble the connection. Due to the presence of the first jacking mechanism 10 and the second jacking mechanism 20, the beam 30 cannot be placed at the mounting position of the first jacking mechanism 10 and the second jacking mechanism 20, resulting in the connection of the tower crane of the portion. The strength has been reduced. In order to reduce the adverse effect of the installation of the jacking mechanism on the structural strength of the tower crane, an overhanging beam 60 is provided on the outside of the jacking mechanism. The outer extension beam 60 has a laterally extending connecting end at both ends, and a flange structure is arranged at the connecting end end, and a flange structure is fixedly disposed on the main chord at the corresponding position, and the two parts of the flange are fixed by bolts. connected. Under the connection of the overhanging beam 60, the problem of the joint strength reduction of the part due to the existence of the jacking mechanism is effectively compensated, the structural strength of the tower crane climbing frame is further enhanced, and the stability of the work is maintained. safety. Preferably, the bolt is a high-strength bolt that further enhances the joint strength between the overhanging beam 60 and the two-part flange on the main chord, increasing its structural strength. In the present embodiment, the specific structure of the tower crane climbing frame is as follows: four main chords A, B, C, D which can be disassembled into two short main chords respectively, and high strength between the two short main chords The bolts 31 are connected, and the main chord A, the main chord B, the six oblique webs 50, the two main beams 30, one beam 40, two outriggers 60 and one jacking beam 11 form a double-sided jacking front a first lifting piece, a main chord C, a main chord D, two inclined webs 50, two main beams 30, two outriggers 60 and a jacking beam 21 form a double-sided jacking Behind a second top lift, front, The rear two lifting pieces are connected to each other by fourteen inclined webs 50, six beams 40, and four main beams 30 to form a rectangular parallelepiped structure, and the outer extension beam 60 and the main chord are bolted, and other connections are Pin connection is used. A tower crane according to an embodiment of the present invention includes a mounted standard section, a standard section to be installed, and a lower support disposed above the installed standard section, and further includes the above-described tower crane climbing frame, and the tower crane climbing frame is installed Between the standard section and the lower support, and set on the installed standard section. The jacking beams on the first lifting body and the second lifting body of the climbing frame are respectively connected with the jacking cylinder through the pin shaft. When jacking up, the piston rod of the jacking cylinder gradually extends, and the lifting beam is lifted by the climbing frame. The hanging boots are hung on the step block welded on the main chord of the standard section of the tower, and the climbing frame and the tower structure above it are lifted up a distance along the tower body, so that the steps are repeated repeatedly to realize the tower type. The tower of the crane is increased. When the jacking action is performed, the three-position six-way valve is in the left position, the left hydraulic line is connected to the oil inlet, the right hydraulic line is connected to the oil outlet, and the hydraulic oil enters through the oil inlet, from the left The side hydraulic line flows, and then enters two balancing valves 71 arranged in parallel. The relief valve in the balancing valve 71 is closed, the oil passage is blocked, the one-way valve is opened under the pressure of the hydraulic oil, and the hydraulic oil passes through the one-way valve. Entering the rodless chamber of the first jacking cylinder 12 and the second jacking cylinder 22 respectively, under the pressure of the hydraulic oil, the piston rods of the two jacking cylinders are extended, and the two jacking mechanisms are jacked up, with a rod The hydraulic oil on one side of the chamber flows back through the other hydraulic line and flows out from the oil outlet. Since the two hydraulic lines are connected, it is guaranteed to provide the same hydraulic oil pressure to ensure simultaneous jacking. Preferably, the adjustable flow valve can be arranged on the hydraulic line of the check valve to the rodless cavity of the jacking cylinder to control the flow rate of the hydraulic oil passage, thereby realizing precise control of the hydraulic oil pressure, and further ensuring realization. Synchronous jacking. When the three-position six-way valve is in the right position, the left hydraulic line is connected to the oil outlet, and the right hydraulic line is connected to the oil inlet. When the hydraulic oil enters the right hydraulic line from the oil inlet, respectively A rod cavity that flows to the two jacking cylinders. At this time, since the check valve and the relief valve are provided on the hydraulic line on the side of the rodless chamber, the hydraulic circuit is different, and the oil on the side of the rodless chamber cannot flow out. As the hydraulic oil pressure is further increased, since the oil pressure on one side of the rod chamber is simultaneously used as the control oil pressure of the relief valve, when the oil pressure on the side of the rod chamber reaches the opening pressure of the relief valve, the relief valve opens. The hydraulic oil on the side of the rodless chamber flows through the overflow valve and flows through the left circuit to the oil outlet and out from the oil outlet. Under the pressure of the hydraulic oil, the piston rod is gradually retracted, thereby achieving the contraction action of the jacking mechanism. When the three-position six-way valve is at the intermediate station, the hydraulic line between the oil inlet and the two jack-up cylinders is disconnected, and the right hydraulic line is connected to the oil outlet, and the check valve is closed and overflows. The valve is also closed because the hydraulic oil without the rod cavity provides sufficient oil pressure, and the oil pressure of the rod chamber and the rodless chamber of the two jacking cylinders is balanced, and the entire jacking mechanism is maintained. The climbing frame is also in a hold state, and the standard section to be installed on the climbing frame can be operated to complete the lifting work. An oil pressure gauge is also provided at the oil inlet, which can easily control the oil inlet pressure and is easier to operate. The upper part of the climbing frame structure is connected to the legs of the lower support of the tower crane, and is connected by a pin shaft. The lower part is placed on the four corners of the main section main string by two roller brackets in two layers; thus, the climbing frame structure can be made. Move up the tower body without tilting back and forth. From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: The tower crane includes four main chords and a rectangular parallelepiped frame surrounded by the main beam, and is provided on one side of the rectangular frame. A jacking mechanism, comprising a first jacking beam and a first jacking cylinder, the four main chords and the main beam are separately detachably connected, so that the entire climbing frame can be disassembled into a separate beam and rod structure, installed and disassembled Convenient, it can be bundled and transported, which effectively saves installation and transportation costs. A second jacking mechanism is further disposed on the opposite side of the first jacking mechanism, including a second jacking beam and a second jacking cylinder. The double-side jacking mechanism reduces the unevenness of the overall structure of the large-sized boom tower crane climbing frame, and ensures uniform force. When the tower crane is lifted and added, the entire climbing frame structure is balanced, and there is no one-sided The factors that change the force greatly reduce the influence on the fatigue strength of the overall steel structure, and improve the structural strength and work performance of the tower crane. The main chords are fixed by the short main chords through high-strength bolts, which can effectively extend the overall length of the climbing frame to meet the standard installation requirements without affecting the convenience of transportation after the main chord is disassembled. An outrigger is connected to the outer side of the main chord of the installation jacking mechanism to further improve the connection strength of the tower crane and ensure the stability and safety of the jacking mechanism. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

1. A tower crane climbing frame, comprising:

Four main chords (A, B, C, D), arranged parallel to each other;

The main beam (30) is respectively disposed at two ends of the four main chords (A, B, C, D), and is fixedly connected to the four main chords (A, B, C, D), four The main chord (A, B, C, D) and the main beam (30) surround the square body frame;

a first jacking mechanism (10) disposed between the two main chords (Α, Β) on one side, including a first jacking beam (11) and a first jacking cylinder (12),

It is characterized in that four of the main chords (A, B, C, D) and the main beam (30) are separately detachably connected.

2. The tower crane climbing frame according to claim 1, further comprising a second jacking mechanism (20) disposed on the other side with respect to the first jacking mechanism (10) Between the main chords (C, D), comprising a second jacking beam (21) and a second jacking cylinder (22), the second jacking cylinder (22) and the first jacking cylinder ( 12) A synchronous jacking control device is provided between them.

3. The tower crane according to claim 2, further comprising a plurality of beams (40) and a diagonal web (50) separately detachably disposed on the four main chords (A, Between B, C, D) and the main beam (30), four main chords (A, B, C, D) and the main beam (30) are connected and supported.

4. The tower crane climbing frame according to claim 2, wherein the second jacking beam (21) is detachably disposed between the two main chords (C, D), The second jacking cylinder (22) is hinged below the second jacking beam (21), and the second jacking beam is movably disposed at the telescopic end of the second jacking cylinder (22). ).

The tower crane climbing frame according to claim 4, wherein two of the inclined webs (50) are hinged below the second jacking beam (21), and the two inclined The other ends of the webs (50) are hinged to the two main chords (C, D) on the other side, respectively.

6. The tower crane climbing frame according to claim 1, wherein the four main chords (A, B, C, D) are fixedly connected by two short main chords by bolts (31) to make. The tower crane climbing frame according to claim 6, wherein a connecting flange (32) is fixedly disposed at a connecting end of the two short main chords, and the bolt (31) is disposed at the connecting On the flange (32), a reinforcing rib (33) is further disposed between the connecting flange (32) and the short main chord. A tower crane climbing frame according to any one of claims 1 to 7, characterized in that in said two main chords (Α, Β) and/or two of said main chords (C, D) The outer side is fixedly connected with an overhanging beam (60). A tower crane climbing frame according to claim 8, wherein said overhanging beam (60) and two of said main chords (Α, Β) and/or two of said main chords (C, D) Removably connected between. A tower crane comprising a mounted standard section, a standard section to be loaded, and a lower support disposed above the installed standard section, characterized by further comprising the tower according to any one of claims 1 to 9. a climbing frame, the tower crane is located between the installed standard section and the lower support, and is sleeved on the installed standard section.