Novel gantry crane with three beams and four trolleys

Abstract

A novel gantry crane with three beams and four trolleys comprises a crane beam frame, upper end beams are fixed to the two ends of the crane beam frame, crane supporting legs are fixed to the bottom ends of the upper end beams, lower end beams are arranged at the bottom ends of the crane supporting legs, and cart walking mechanisms are arranged at the bottom ends of the lower end beams. A first supporting beam is arranged on one side of the second supporting beam, a third supporting beam is arranged on the other side of the second supporting beam, the first supporting beam, the second supporting beam and the third supporting beam are evenly arranged at intervals, and trolley walking rails are fixed to the top ends of the first supporting beam, the second supporting beam and the third supporting beam. Two first hoisting trolleys are arranged above the first supporting beam and the second supporting beam, two second hoisting trolleys are arranged above the second supporting beam and the third supporting beam, and hoisting mechanisms are arranged on the first hoisting trolleys and the second hoisting trolleys. The device is simple in structure and convenient to use.

Description

A new type of gantry crane with three beams and four trolleys Technical Field

[0001] This utility model belongs to the field of crane technology, and in particular relates to a new type of gantry crane with three beams and four trolleys. Background Technology

[0002] A gantry crane is a type of crane, also called a portal crane. It's a bridge-type crane with a bridge frame supported on ground rails by two outriggers. Structurally, it consists of a gantry frame, a trolley traveling mechanism, a lifting trolley, and electrical components. Gantry cranes can be designed in different styles depending on their application. For example, some gantry cranes have only one outrigger, with the other side supported by a factory building or trestle for operation; these are called semi-gantry cranes. A typical gantry crane includes a main beam, outriggers, a trolley traveling mechanism, a lifting trolley, and lifting devices. However, existing gantry cranes... Most gantry cranes have a double-trolley or single-trolley structure, which is perfectly adequate for lifting ordinary heavy objects. However, they cannot meet the requirements for loading and unloading tunnel boring machines (TBMs). This is because TBMs are large and heavy, and the lifting points of the cranes need to be distributed. Although double-trolley, double-hook cranes can lift TBMs, they are prone to swaying during operation due to fewer lifting points, and they also increase the difficulty of operation for the operators. Therefore, existing gantry cranes are inconvenient to use in the lifting and transportation of TBMs, affecting construction efficiency and safety. Summary of the Invention

[0003] To address the technical problem of the inconvenience of existing gantry cranes in lifting tunnel boring machines, this utility model provides a novel three-beam, four-trolley gantry crane. It includes a crane beam frame, with upper beams fixed at both ends for support. Vertically mounted crane legs are fixed at the bottom of each upper beam. A lower beam is located at the bottom of each crane leg, and a trolley traveling mechanism is located at the bottom of the lower beam. The trolley traveling mechanism includes a horizontally mounted traveling wheel bracket. The top of the traveling wheel bracket is hinged to the bottom of the lower beam via a hinge seat. Two trolley traveling wheels are rotatably mounted on the traveling wheel bracket. A trolley traveling motor is fixed on the traveling wheel bracket, and its power output shaft is connected to the trolley traveling wheels via a transmission connection. The trolley traveling motor is connected to a power source and a PLC controller via a cable. Starting the trolley traveling motor causes the trolley traveling wheels to rotate, thereby moving the gantry crane. The crane frame includes a second support beam, a first support beam on one side of the second support beam, and a third support beam on the other side. The first, second, and third support beams are evenly spaced. Trolley tracks are fixed to the top of each support beam. Two first lifting trolleys are mounted above the first and second support beams, on the trolley tracks at the top of the first and second support beams. Two second lifting trolleys are mounted above the second and third support beams, on the trolley tracks at the top of the second and third support beams. Both the first and second lifting trolleys are equipped with lifting mechanisms. This configuration of the first, second, and third support beams, along with the first and second lifting trolleys, forms a three-beam, four-trolley structure, providing four lifting points for the tunnel boring machine (TBM). This evenly distributes the lifting weight, and when the gantry crane moves, each lifting trolley forms a rectangular structure with the TBM, reducing the TBM's sway and improving safety. The first and second lifting trolleys have identical structures and both include a trolley frame. Trolley wheels are rotatably mounted at the bottom of the trolley frame. A trolley travel motor, corresponding to the travel wheels, is fixed on the trolley frame and is driven by the travel wheels. The trolley travel motor is connected to a power source and a PLC controller via a cable. Starting the trolley travel motor causes the travel wheels to move freely along the trolley travel track, thus allowing adjustment of the positions of the first and second lifting trolleys. The lifting mechanism includes a lifting drum rotatably mounted on the top of the trolley frame, a reducer, and a lifting motor. The power output shaft of the lifting motor is driven by the reducer and the lifting drum. A lifting device is located below the trolley frame and is connected to the lifting drum via a wire rope. The lifting motor is connected to a power source and a PLC controller via a cable. Starting the lifting motor causes the lifting device to move vertically up and down via the wire rope, facilitating adjustment of the lifting device's height.

[0004] Preferably, the lifting device includes a hook bracket, a hook is provided below the hook bracket, the hook is rotatably mounted on the lower end of the hook bracket, and a movable pulley block is provided at the upper end of the hook bracket, with the wire rope passing through the movable pulley block and connected to the lifting drum.

[0005] Preferably, the outer ends of the walking wheel brackets are all fixed with buffers for protection.

[0006] The above scheme has the following advantages:

[0007] The first, second, and third support beams, along with the first and second lifting trolleys, form a three-beam, four-trolley structure, providing four lifting points for the tunnel boring machine (TBM). This distributes the lifting weight evenly, and during TBM movement, each lifting trolley forms a rectangular structure with the TBM, reducing the TBM's sway and improving safety. The trolley traveling mechanism, driven by the trolley's traveling motor, allows the TBM to move freely. The trolley traveling mechanism, driven by the trolley's traveling motor, allows free movement along the trolley's track, facilitating adjustments to the positions of the first and second lifting trolleys. A buffer protects the TBM. Attached Figure Description

[0008] Figure 1 is a schematic diagram of the main structure of this utility model;

[0009] Figure 2 is a schematic diagram of the left-side structure of this utility model;

[0010] Figure 3 is a schematic diagram of the hoisting mechanism;

[0011] Figure 4 is a schematic diagram of the traveling mechanism of the trolley.

[0012] Reference numerals: 1. Crane beam; 2. Crane outriggers; 3. Trolley traveling mechanism; 4. First trolley; 5. Second trolley; 6. Lifting mechanism; 7. Workshop; 8. Tunnel boring machine; 11. First support beam; 12. Second support beam; 13. Third support beam; 21. Upper beam; 22. Lower beam; 31. Traveling wheel bracket; 32. Hinge seat; 33. Trolley traveling wheel; 34. Trolley traveling motor; 35. Buffer; 41. Trolley frame; 42. Trolley traveling wheel; 61. Lifting drum; 62. Reducer; 63. Lifting tool; 64. Wire rope; 65. Hook bracket; 66. Pulley block; 67. Hook. Detailed Implementation

[0013] As shown in Figures 1-4, a novel three-beam, four-trolley gantry crane includes a crane beam frame 1. Both ends of the crane beam frame 1 are fixed with upper beams 21, which provide support. Vertically arranged crane legs 2 are fixed to the bottom of each upper beam 21. A lower beam 22 is located at the bottom of each crane leg 2. A trolley traveling mechanism 3 is located at the bottom of the lower beam 22. The trolley traveling mechanism 3 includes a horizontally arranged traveling wheel bracket 31. The top of the traveling wheel bracket 31 is hinged to the bottom of the lower beam 22 via a hinge seat 32. Two trolley traveling wheels 33 are rotatably mounted on the traveling wheel bracket 31. A trolley traveling motor 34 is fixed on the traveling wheel bracket 31. The power output shaft of the trolley traveling motor 34 is connected to the trolley traveling wheels 33 via a transmission connection. The trolley traveling motor 34 is connected to a power source and a PLC controller via a cable. Starting the trolley traveling motor 34 causes the trolley traveling wheels 33 to rotate, thereby moving the gantry crane. The crane beam 1 includes a second support beam 12, with a first support beam 11 on one side and a third support beam 13 on the other side. The first, second, and third support beams 11, 12, and 13 are evenly spaced. Trolley tracks are fixed to the tops of the first, second, and third support beams 11, 12, and 13. Two first lifting trolleys 4 are positioned above the first and second support beams 11 and 12, and are mounted on the trolley tracks at the tops of the first and second support beams 11 and 12. Two second lifting trolleys 5 are installed above, and the two second lifting trolleys 5 are mounted on the trolley travel rails at the top of the second support beam 12 and the third support beam 13. The first lifting trolley 4 and the second lifting trolley 5 are both equipped with lifting mechanisms 6. The first support beam 11, the second support beam 12, the third support beam 13, the first lifting trolley 4 and the second lifting trolley 5 are arranged to form a three-beam four-trolley structure, forming four lifting points to lift the tunnel boring machine 8. This makes the lifting weight evenly distributed, and when the gantry crane moves, each lifting trolley and the tunnel boring machine 8 form a rectangular structure, which reduces the swing amplitude of the tunnel boring machine 8 and improves safety. The first lifting trolley 4 and the second lifting trolley 5 have the same structure and both include a trolley frame 41. The bottom of the trolley frame 41 is rotatably equipped with trolley wheels 42. A trolley travel motor (not shown in the attached drawings) corresponding to the trolley wheels 42 is fixed on the trolley frame 41. The trolley travel motor is connected to the trolley wheels 42 through a transmission connection. The trolley travel motor is connected to the power supply and the PLC controller through a cable. When the trolley travel motor is started, it drives the trolley wheels 42 to move freely along the trolley travel track, thereby adjusting the position of the first lifting trolley 4 and the second lifting trolley 5.The lifting mechanism 6 includes a lifting drum 61 rotatably mounted on the top of the trolley frame 41, a reducer 62, and a lifting motor (not shown in the attached drawings). The power output shaft of the lifting motor is connected to the lifting drum 61 via the reducer 62. A lifting device 63 is provided below the trolley frame 41. The lifting device 63 is connected to the lifting drum 61 via a wire rope 64. The lifting motor is connected to the power supply and PLC controller via a cable to start the lifting motor. The lifting motor pulls the lifting device 63 vertically up and down via the wire rope 64, thereby facilitating the adjustment of the height of the lifting device 63.

[0014] Preferably, the lifting device 63 includes a hook bracket 65, a hook 67 is provided below the hook bracket 65, the hook 67 is rotatably mounted on the lower end of the hook bracket 65, and a movable pulley block 66 is provided at the upper end of the hook bracket 65. The wire rope 64 passes around the movable pulley block 66 and is connected to the lifting drum 61.

[0015] Preferably, the outer ends of the walking wheel brackets 31 are all fixed with buffers 35 for protection.

[0016] Usage process:

[0017] In use, the gantry crane is started by activating the trolley travel motor 34, which drives the trolley travel wheels 33 to rotate, thereby moving the gantry crane to the tunnel boring machine 8 below the workshop 7. Then, the trolley travel motors on the first and second trolleys are activated to adjust their positions until they reach the designated positions. Then, the hoisting motors on the first and second trolleys are activated, and the hoisting motors pull the lifting device 63 vertically downwards via the wire rope 64 until the hooks 67 are lowered above the tunnel boring machine 8. Each hook 67 is then hooked onto the tunnel boring machine 8. At the same time, the hoisting motors on the first and second trolleys are activated, and the hoisting motors pull the hooks 67 and the tunnel boring machine 8 vertically upwards via the wire rope 64. Then, the position of the tunnel boring machine 8 is adjusted by synchronously moving the first and second trolleys.

[0018] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", "horizontal", "vertical", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A novel three-beam, four-trolley gantry crane, comprising a crane beam frame, with upper beams fixed at both ends of the crane beam frame, and vertically arranged crane legs fixed at the bottom ends of the upper beams; a lower beam is provided at the bottom end of the crane legs, and a trolley traveling mechanism is provided at the bottom end of the lower beam, characterized in that: The crane beam includes a second support beam, a first support beam on one side of the second support beam, and a third support beam on the other side of the second support beam. The first, second, and third support beams are evenly spaced. A trolley travel track is fixed to the top of the first, second, and third support beams. Two first lifting trolleys are located above the first and second support beams and are mounted on the trolley travel tracks at the top of the first and second support beams. Two second lifting trolleys are located above the second and third support beams and are mounted on the trolley travel tracks at the top of the second and third support beams. Both the first and second lifting trolleys are equipped with lifting mechanisms.

2. The novel gantry crane with three beams and four trolleys according to claim 1, characterized in that: The first and second lifting trolleys have the same structure and both include a trolley frame. The bottom of the trolley frame is rotatably equipped with trolley wheels. A trolley travel motor corresponding to the trolley travel wheel is fixed on the trolley frame and is connected to the trolley travel wheel via a drive.

3. A novel gantry crane with three beams and four trolleys according to claim 2, characterized in that: The lifting mechanism includes a lifting drum rotatably mounted on the top of the trolley frame, as well as a reducer and a lifting motor. The power output shaft of the lifting motor is connected to the lifting drum via the reducer. A lifting device is provided below the trolley frame and is connected to the lifting drum via a wire rope.

4. A novel gantry crane with three beams and four trolleys according to claim 3, characterized in that: The lifting device includes a hook bracket, with a hook located below the hook bracket. The hook is rotatably mounted on the lower end of the hook bracket, and a movable pulley block is located at the upper end of the hook bracket. The wire rope passes through the movable pulley block and connects to the hoisting drum.

5. A novel gantry crane with three beams and four trolleys according to claim 1, characterized in that: The trolley traveling mechanism includes a horizontally arranged traveling wheel bracket. The top of the traveling wheel bracket is hinged to the bottom of the lower beam via a hinge seat. Two trolley traveling wheels are rotatably mounted on the traveling wheel bracket. A trolley traveling motor is fixed on the traveling wheel bracket. The power output shaft of the trolley traveling motor is connected to the trolley traveling wheel drive.

6. A novel gantry crane with three beams and four trolleys according to claim 5, characterized in that: The outer ends of the walking wheel brackets are all fixed with shock absorbers for protection.

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