Mast crane

Abstract

The utility model discloses a mast crane which comprises a lifting hook, a main arm, a lifting winch, a variable-amplitude winch, a front supporting rod, a pulling plate, a frame, a front base, a rear base and a rear supporting rod, the front base and the rear base are anchored on a foundation through foundation bolts, the main arm and the front supporting rod are hinged to the frame, the lifting winch and the variable-amplitude winch are arranged on the frame, the frame is arranged on the front base, and the rear supporting rod is arranged on the rear base. The bottom of the rear supporting rod is hinged to the rear base. The front bases are two sets of bases which are longitudinally arranged in parallel, and the frame is connected with the front bases through square flanges and bolts. Transfer tools are arranged on the two sides of the vehicle frame, and a space for the axis vehicle to enter is reserved below the transfer tools. By arranging the frame, the supporting oil cylinder and other components, the upper vehicle part of the crane is fixed on the frame in a concentrated mode, the whole upper vehicle transfer is achieved through the axis vehicle, meanwhile, the front base and the frame square flange connector are arranged, the front base and the frame square flange connector can still be connected through bolts after rotating by 90 degrees relatively, the transfer assembly steps are simplified, and the transfer installation cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a mast crane. Background Art

[0002] Mast cranes are one of the more common cranes, commonly used in ports and construction sites. They are usually fixedly installed, that is, the lifting of objects is achieved by pitching the main arm and raising and lowering the hook. In the application scenario of the port, ships are usually loaded and unloaded, and their main arms are extended from the dock shore. In the process of assembling and disassembling the crane, since the main arm extends into the water, a floating crane is required to assist in the installation of the boom and the hook threading, which will incur certain costs and pose safety hazards. The invention patent with Chinese patent publication number CN113602981A discloses a slewing mast crane, which arranges a large number of counterweights at the hinge point of the rear support rod, so that the heavy objects can move in the direction, expand the operating range of the mast crane, and avoid disassembly and assembly operations on the water to a certain extent. However, the cost of arranging a large number of counterweights is high, and the mast cranes used in ports have the need for transfer, that is, from one dock to another, and there are multiple assembly and disassembly. The disassembly of a large number of counterweights is difficult and the transportation cost is high. Utility Model Content

[0003] Purpose of the utility model: The purpose of the utility model is to provide a mast crane which has a simple structure, low cost and is easy to disassemble and transfer.

[0004] Technical solution: The utility model provides a mast crane, including a hook, a main arm, a lifting winch, a luffing winch, a front support rod, a pull plate, a frame, a front base, a rear base, and a rear support rod. The front base and the rear base are fixed on a foundation, the main arm and the front support rod are hinged on the frame, the frame is arranged on the front base, and the bottom of the rear support rod is hinged to the rear base; a supporting cylinder for supporting the front support rod is also hinged on the frame; the lifting winch and the luffing winch are arranged on the frame; the two ends of the pull plate are respectively connected to the main arm and the front support rod.

[0005] Furthermore, the front base and the rear base are anchored on the foundation by anchor bolts.

[0006] Furthermore, the front base is composed of two groups of bases arranged in parallel and longitudinally, and the frame is connected to the front base by bolts.

[0007] Furthermore, the four corners of the front base are provided with first flanges, and the bottom of the frame is provided with a second flange that matches the first flanges.

[0008] Furthermore, the mounting positions of the first flange and the second flange are square, and the front base is also square, and can still be installed even if they are offset by 90 degrees.

[0009] Furthermore, the frame is also provided with a connecting rod for fixing the rear support rod.

[0010] Furthermore, transfer tooling is provided on both sides of the frame, and space for an axle vehicle to enter is reserved under the transfer tooling.

[0011] Beneficial effects: Compared with the prior art, the utility model has the following advantages: (1) The utility model realizes the transportation of the crane onto a vehicle by means of an axle vehicle by setting up components such as a frame and a supporting cylinder, thereby avoiding water operations during the disassembly and assembly of the crane, reducing operation costs and improving operation safety; (2) With the help of the frame structure and the coordination of the front and rear bases and struts, the crane's luffing force can be transmitted to the foundation through the rear struts and the rear base, and no additional counterweight is required; (3) The utility model has a simple structure and low manufacturing and transportation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of the utility model during preparatory operation;

[0013] Figure 2 This is a schematic diagram of the overall structure of the utility model during transportation;

[0014] Figure 3 It is a schematic diagram of the overall structure of the utility model when in operation;

[0015] Figure 4 It is a schematic diagram of the front base arrangement structure of the utility model. DETAILED DESCRIPTION

[0016] The technical solution of the utility model is further described below in conjunction with the accompanying drawings.

[0017] The utility model provides a mast crane, such as Figure 1 As shown, it includes a hook 1, a main arm 2, a hoisting winch 3, a frame 4, a front base 5, a luffing winch 6, a rear base 7, a rear support rod 8, a front support rod 9, and a pull plate 10. The front base 5 and the rear base 7 are anchored on the foundation by anchor bolts, and the two ends of the pull plate 10 are respectively connected to the main arm 2 and the front support rod 9; Figure 4As shown, the front base 5 is composed of two groups of bases arranged in parallel and longitudinally. The four corners of the front base 5 are provided with a first flange, and the bottom of the frame 4 is provided with a second flange that matches the first flange. The mounting positions of the first flange and the second flange are square, and the front base is also square. The frame 4 is connected to the front base 5 by bolts. A lifting winch 3 and a luffing winch 6 are arranged on the frame 4. The main arm 2 and the front support rod 5 are hinged on the frame 4, and the rear support rod 8 is hinged on the rear base 7. A lifting winch 3 and a luffing winch 6 are also arranged on the frame. The main arm 2 and the front support rod 9 are hinged on the frame 4, and the rear support rod 8 is hinged on the rear base 7. The luffing pulling force of the crane is transmitted to the foundation through the rear support rod 8 and the rear base 7, and no counterweight is required. The rear support rod 8 and the front support rod 9 form a crane herringbone frame, and the part without the front and rear bases is called a crane onboard. The crane is equipped with a transfer tooling 13 to realize the overall transfer of the onboard part, such as Figure 2 As shown, a support cylinder 11 is hinged on the frame 4 to support the front support rod 9; a connecting rod 12 is provided on the frame to fix the rear support rod 8 on the frame 4; a transfer tool 13 is installed on both sides of the frame, and the space under the transfer tool is enough for the axis vehicle to enter. Unfasten the bolts connecting the frame 4 and the front base 5, and the upper part can be lifted up for transportation as a whole.

[0018] During the implementation of the utility model, two positions are defined: the operating position and the assembly position. The operating position is the position of the crane hoisting operation, which is perpendicular to the wharf; the assembly position is along the wharf direction, that is, 90 degrees to the crane operating position.

[0019] When assembling the utility model, first place the front base 5 in place and anchor it according to the working position, and then assemble the vehicle according to the assembly position. Figure 3 As shown. The frame 4 is installed on the front base, and the mounting flanges of the two are both square, so they can still be installed even if they are offset by 90 degrees, and the bolts are tightened. Install the lifting winch 3, the main arm 2 and the hook 1. Install the luffing winch 6, the rear support rod 8, and the front support rod 9. Use the main arm 2 to pull up the front support rod 9, and install the supporting cylinder 11. Connect the rear support rod 9 to the frame. Pull up the main arm 2, and the luffing tension is transmitted to the foundation by the rear support rod 8 and the frame 4, and no counterweight is required. Install the transfer tooling 13, untie the bolts between the frame 4 and the front base 5, lift it with an axis car, and transport it to an open area. Turn the whole machine 90 degrees, and then transport it to the front base 5. Place the upper seat on the front base, tighten the bolts, and remove the axis car. The rear base 7 is installed in place, and the rear support rod 8 is hinged to the rear base 7. Remove the supporting cylinder 11, the connecting rod 12, and the transfer tooling 13. At this point, the crane can be operated, as shown in the figure. Figure 1 When the utility model is transported and disassembled, the supporting oil cylinder 11 is installed, the hinge point between the rear support rod 8 and the rear base 7 is unlocked, the rear support rod 8 is connected to the frame 4 with the connecting rod 12, the transport tool 13 is installed, the bolts between the frame 4 and the front base 5 are unlocked, and the crane is transported on the vehicle with an axis vehicle and can be adjusted to the assembly position for disassembly.

Claims

1. A mast crane, comprising a hook (1), a main arm (2), a hoisting winch (3), a luffing winch (6), a front support rod (9), and a pull plate (10), characterized in that: The invention also comprises a vehicle frame (4), a front base (5), a rear base (7) and a rear support rod (8); the front base (5) and the rear base (7) are fixed on a foundation; the main arm (2) and the front support rod (9) are hinged on the vehicle frame (4); the vehicle frame (4) is arranged on the front base (5); the bottom of the rear support rod (8) is hinged to the rear base (7); a supporting cylinder (11) for supporting the front support rod (9) is also hinged on the vehicle frame (4); the lifting winch (3) and the variable-length winch (6) are arranged on the vehicle frame (4); and the two ends of the pull plate (10) are respectively connected to the main arm (2) and the front support rod (9).

2. A mast crane according to claim 1, characterized in that: The front base (5) and the rear base (7) are anchored on the foundation by means of anchor bolts.

3. A mast crane according to claim 1, characterized in that: The front base (5) is composed of two groups of bases arranged in parallel and longitudinally, and the vehicle frame (4) is connected to the front base (5) by bolts.

4. A mast crane according to claim 3, characterized in that: The four corners of the front base (5) are provided with first flanges, and the bottom of the frame (4) is provided with a second flange that matches the first flanges.

5. A mast crane according to claim 4, characterized in that: The mounting positions of the first flange and the second flange are square, and the front base (5) is also square.

6. A mast crane according to claim 1, characterized in that: The vehicle frame (4) is also provided with a connecting rod (12) for fixing the rear support rod (8).

7. A mast crane according to claim 1, characterized in that: Transfer tools (13) are provided on both sides of the vehicle frame (4), and a space for an axle vehicle to enter is reserved below the transfer tools (13).

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