Device for replacing steel wire rope of port portal crane

Abstract

A device for replacing a port portal crane steel wire rope belongs to the technical field of portal crane maintenance equipment and is used for replacing the port portal crane steel wire rope. According to the technical scheme, a chassis is a flat cylinder, a plurality of universal walking wheels are installed on the bottom face of the chassis, a center shaft is welded to the center of the chassis, a rotating shaft hole is formed in the center of a rotating disc, and the upper end of the center shaft is inserted into the rotating shaft hole; four vertical rotating supports are evenly distributed and installed on the lower surface below the rotating disc, the upper ends of the four rotating supports are connected with the lower surface of the rotating disc in a welded mode, idler wheels are installed at the lower ends of the four rotating supports and are in rolling fit with the upper surface of the chassis, and the steel wire rope is placed on the upper surface of the rotating disc. The steel wire rope winding device is simple in structure and convenient to use, a new steel wire rope can be wound out along with rotation of the rotating disc to be installed on portal crane equipment, the labor intensity of maintenance personnel when the steel wire rope is replaced is relieved, the maintenance work efficiency is improved, and meanwhile occupation of other equipment of a port can be reduced.

Description

Technical Field

[0001] The utility model relates to a device for replacing a steel wire rope of a port gantry crane, and belongs to the technical field of gantry crane maintenance equipment. Background Art

[0002] In the process of port production operations, especially in the operation of bulk cargo terminals, gantry cranes are important equipment. A variety of wire ropes are used on gantry cranes, such as the main wire rope of the gantry crane, slings, etc. Since the gantry crane works frequently, the load of the wire rope is very large, so the wire rope of the gantry crane needs to be replaced regularly. The diameter of the wire rope for the gantry crane is 40mm, the length is about 150 meters, and a wire rope weighs about 1 ton. In the past, when replacing the wire rope of the gantry crane, other transportation and lifting equipment were required to cooperate, which not only made the workers work very hard, but also occupied the port's lifting equipment, which urgently needs to be improved. Utility Model Content

[0003] The technical problem to be solved by the utility model is to save manpower and material resources when changing the rope of the gantry crane. In order to achieve the above purpose, the utility model designs a device for replacing the steel wire rope of the port gantry crane, which can reduce the labor intensity of workers when replacing the steel wire rope, improve maintenance efficiency, and reduce the occupancy of other equipment in the port.

[0004] The technical solution to solve the above technical problems is:

[0005] A device for replacing the steel wire rope of a port gantry crane comprises a chassis, a universal travel wheel, a central shaft, a turntable and a rotating bracket. The chassis is a flat cylinder, a plurality of universal travel wheels are installed on the bottom surface of the chassis, a central shaft is welded at the center of the chassis, a rotating shaft hole is provided at the center of the turntable, the upper end of the central shaft is inserted into the rotating shaft hole, the rotating shaft hole of the turntable and the upper end of the central shaft are rotatably connected, four vertical rotating brackets are evenly installed on the lower surface below the turntable, the four rotating brackets are straight rods, the upper ends of the four rotating brackets are respectively welded to the lower surface of the turntable, rollers are respectively installed at the lower ends of the four rotating brackets, the rollers are rollingly matched with the upper surface of the chassis, and the steel wire rope is placed on the upper surface of the turntable.

[0006] The above-mentioned device for replacing the wire rope of the port gantry crane is characterized in that the upper part of the central shaft is a stepped shaft, the upper part of the stepped shaft is a small diameter end, the diameter of the small diameter end matches the diameter of the rotating shaft hole of the turntable, the lower part of the stepped shaft is a large diameter end, the top surface of the large diameter end is against the circumferential lower surface of the rotating shaft hole of the turntable, the upper end of the small diameter end of the central shaft is provided with an annular groove, a deep groove ball bearing is installed in the groove, the outer ring of the deep groove ball bearing is connected to the rotating shaft hole of the turntable, the large diameter end of the central shaft is provided with an annular groove at the step where the lower surface of the turntable is in contact with the large diameter end of the central shaft, a thrust bearing is installed in the groove, and the upper and lower surfaces of the thrust bearing are rotatably connected to the bottom surface of the turntable and the step of the central shaft respectively.

[0007] The above-mentioned device for replacing the wire rope of the port gantry crane also has a foot brake, which is composed of a fixed frame, a rotating shaft, a pressure rod, a brake block, a pin shaft, a sliding sleeve, and a reset spring. The fixed frame is welded to the outer side of the chassis, and a support plate is provided on the outside of the fixed frame. An axle seat is welded above the support plate, and the rotating shaft is installed in the axle seat. The pressure rod is a long rod, and the middle part of the pressure rod is rotatably connected to the rotating shaft. The front end of the pressure rod is connected to the lower end of the brake block through the pin shaft, and the brake block is placed in the sliding sleeve, which is connected to the upper end of the fixed frame. The brake block and the sliding sleeve are slidably matched, and the upper end of the brake block is opposite to the lower bottom surface of the turntable. One end of the reset spring is fixed to the upper end of the sliding sleeve, and the other end of the reset spring is connected to the rear of the pressure rod.

[0008] The beneficial effects of the utility model are:

[0009] The utility model has a universal walking wheel installed at the lower part of the chassis, so that the steel wire rope can be moved into place for replacement, eliminating the need for equipment for transporting and hoisting the steel wire rope; the turntable can rotate around the central axis under the support of the central axis, and the turntable is surrounded by rotating brackets, and the lower ends of the rotating brackets can rotate on the surface of the chassis through rollers. The steel wire rope is placed on the upper surface of the turntable and can rotate with the turntable; a deep groove ball bearing and a thrust bearing are installed between the central axis and the turntable, so that the turntable is easier to rotate; the foot brake can stop the rotating turntable.

[0010] The utility model discloses replacing wire rope, and it is convenient to use, and can make the new wire rope be wound out with the rotating disk and installed on the gantry crane equipment, thereby reducing the labor intensity of maintenance personnel when replacing wire rope, improving the maintenance work efficiency, and reducing the occupation of other equipment in the port. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 It is a structural diagram of the foot brake.

[0013] The markings in the figure are as follows: chassis 1, universal walking wheel 2, center axis 3, turntable 4, rotating shaft hole 5, rotating bracket 6, roller 7, deep groove ball bearing 8, thrust bearing 9, foot brake 10, fixing frame 11, support plate 12, rotating shaft 13, pressure rod 14, brake block 15, pin shaft 16, sliding sleeve 17, return spring 18. DETAILED DESCRIPTION

[0014] The utility model is composed of a chassis 1, a universal walking wheel 2, a central shaft 3, a turntable 4, a rotating bracket 6, a deep groove ball bearing 8, a thrust bearing 9 and a foot brake 10.

[0015] As shown in the figure, the chassis 1 is a flat cylinder, and a plurality of universal wheels 2 are installed on the bottom surface of the chassis 1. The universal wheels 2 are installed at the lower part of the chassis 1, and the replacement wire rope can be moved to a position, eliminating the need for equipment for transporting and hoisting the wire rope.

[0016] As shown in the figure, a central axis 3 is welded at the center of the chassis 1, a rotating shaft hole 5 is provided at the center of the turntable 4, the upper end of the central axis 3 is inserted into the rotating shaft hole 5, and the rotating shaft hole 5 of the turntable 4 is rotatably connected to the upper end of the central axis 3.

[0017] As shown in the figure, the upper part of the central shaft 3 is a stepped shaft, the upper part of the stepped shaft is a small diameter end, the diameter of the small diameter end matches the diameter of the rotating shaft hole 5 of the turntable 4, and the lower part of the stepped shaft is a large diameter end, the top surface of the large diameter end is against the circumferential lower surface of the rotating shaft hole 5 of the turntable 4. The upper end of the small diameter end of the central shaft 3 has an annular groove, and a deep groove ball bearing 8 is installed in the groove, and the outer ring of the deep groove ball bearing 8 is connected to the rotating shaft hole 5 of the turntable 4. There is an annular groove at the step where the large diameter end of the central shaft 3 contacts the lower surface of the turntable 4, and a thrust bearing 9 is installed in the groove, and the upper and lower surfaces of the thrust bearing 9 are rotatably connected to the bottom surface of the turntable 4 and the step of the central shaft 3 respectively.

[0018] The upper end of the center shaft 3 is assembled with a deep groove ball bearing, which is a radial bearing, and can ensure that the turntable 4 is not eccentric when rotating, making its operation more stable. If the turntable 4 does not have a bearing when rotating, the contact friction between the center shaft 3 and the turntable 4 is very large, which is time-consuming and labor-intensive. After the bearing is installed, the force is greatly reduced, making the turntable 4 easier to rotate; the lower part of the center shaft 3 is assembled with a thrust ball bearing, which is only subjected to downward axial force when rotating, and does not bear any radial force.

[0019] As shown in the figure, four vertical rotating brackets 6 are evenly installed on the lower surface below the turntable 4. The four rotating brackets are straight rods. The upper ends of the four rotating brackets 6 are respectively welded to the lower surface of the turntable 4. The lower ends of the four rotating brackets 6 are respectively installed with rollers 7. The rollers 7 are rollingly matched with the upper surface of the chassis 1, and the wire rope is placed on the upper surface of the turntable 4. The four rotating brackets 6 can support the turntable 4 so that the turntable 4 will not swing when rotating and rotates smoothly.

[0020] As shown in the figure, the foot brake is composed of a fixing frame 11, a support plate 12, a rotating shaft 13, a pressure rod 14, a brake block 15, a pin 16, a sliding sleeve 17, and a reset spring 18. The fixing frame 11 is welded to the outside of the chassis 1, the outside of the fixing frame 11 is provided with a support plate 12, an axle seat is welded above the support plate 12, the rotating shaft 13 is installed in the axle seat, the pressure rod 14 is a long rod, the middle part of the pressure rod 14 is rotatably connected to the rotating shaft 13, the front end of the pressure rod 14 is connected to the lower end of the brake block 15 through the pin 16, the brake block 15 is placed in the sliding sleeve 17, the sliding sleeve 17 is connected to the upper end of the fixing frame 11, the brake block 15 is slidably matched with the sliding sleeve 17, the upper end of the brake block 15 is opposite to the lower bottom surface of the rotating disk 4, one end of the reset spring 18 is fixed to the upper end of the sliding sleeve 17, and the other end of the reset spring 18 is connected to the rear of the pressure rod 14.

[0021] When the turntable 4 needs to stop rotating, the foot steps on the rear of the pressure rod 14, and the pressure rod 14 rotates through the rotating shaft 13. The front end of the pressure rod 14 pushes up the brake block 15 through the lever action, and the upper end of the brake block 15 contacts the turntable 4, thereby generating friction to stop the turntable 4 smoothly. When there is no external force, the return spring 18 automatically separates the brake block 15 from the turntable through the pulling force of the return spring 18. Due to the effect of inertia, it is difficult for the turntable 4 to stop when releasing the rope. Human braking is very strenuous and very unsafe. The foot brake can stop the rotating turntable 4 by stepping on the foot, which is very effective in ensuring the safety of the turntable 4.

[0022] An example of the present utility model is as follows:

[0023] The chassis 1 has a diameter of 1600 mm and a thickness of 200 mm;

[0024] The diameter of the central axis 3 is 225 mm and the height is 325 mm;

[0025] The diameter of the turntable 4 is 1800 mm, the thickness is 120 mm, and the diameter of the rotating shaft hole 5 is 180 mm;

[0026] The diameter of the rotating bracket 6 is 1400 mm and the height is 160 mm;

[0027] The model of the deep groove ball bearing 8 is 6024; the model of the thrust bearing 9 is 51136X.

Claims

1. A device for replacing the steel wire rope of a port gantry crane, characterized in that: The invention comprises a chassis (1), universal running wheels (2), a central shaft (3), a turntable (4), and a rotating bracket (6). The chassis (1) is a flat cylinder. A plurality of universal running wheels (2) are mounted on the bottom surface of the chassis (1). The center of the chassis (1) is welded with a central shaft (3). The center of the turntable (4) has a rotating shaft hole (5). The upper end of the central shaft (3) is inserted into the rotating shaft hole (5) of the turntable (4). The rotating shaft hole (5) of the turntable (4) is rotatably connected to the upper end of the central shaft (3). Four vertical rotating brackets (6) are evenly mounted on the lower surface below the turntable (4). The four rotating brackets (6) are straight rods. The upper ends of the four rotating brackets (6) are respectively welded to the lower surface of the turntable (4). Rollers (7) are respectively mounted on the lower ends of the four rotating brackets (6). The rollers (7) are in rolling cooperation with the upper surface of the chassis (1). Steel wire ropes are placed on the upper surface of the turntable (4).

2. The device for replacing the steel wire rope of a port gantry crane according to claim 1 is characterized in that: The upper part of the central shaft (3) is a stepped shaft, the upper part of the stepped shaft is a small diameter end, the diameter of the small diameter end matches the diameter of the rotating shaft hole (5) of the turntable (4), the lower part of the stepped shaft is a large diameter end, the top surface of the large diameter end is against the circumferential lower surface of the rotating shaft hole (5) of the turntable (4), the upper end of the small diameter end of the central shaft (3) is provided with an annular groove, a deep groove ball bearing (8) is installed in the groove, the outer ring of the deep groove ball bearing (8) is connected to the rotating shaft hole (5) of the turntable (4), the large diameter end of the central shaft (3) is provided with an annular groove at the step where the lower surface of the turntable (4) contacts the large diameter end, the thrust bearing (9) is installed in the groove, the upper and lower surfaces of the thrust bearing (9) are respectively rotatably connected to the bottom surface of the turntable (4) and the step of the central shaft (3).

3. The device for replacing the steel wire rope of a port gantry crane according to claim 1 is characterized in that: The utility model also has a foot brake (10), which is composed of a fixing frame (11), a support plate (12), a rotating shaft (13), a pressure rod (14), a brake block (15), a pin (16), a sliding sleeve (17), and a return spring (18). The fixing frame (11) is welded to the outer side of the chassis (1), the outside of the fixing frame (11) is provided with a support plate (12), an axle seat is welded above the support plate (12), the rotating shaft (13) is installed in the axle seat, the pressure rod (14) is a long rod, and the middle part of the pressure rod (14) and the rotating shaft (13) are rotating shafts. The front end of the pressure rod (14) is connected to the lower end of the brake block (15) through a pin (16), the brake block (15) is placed in a sliding sleeve (17), the sliding sleeve (17) is connected to the upper end of the fixed frame (11), the brake block (15) and the sliding sleeve (17) are in sliding cooperation, the upper end of the brake block (15) is opposite to the lower bottom surface of the rotating disk (4), one end of the return spring (18) is fixed to the upper end of the sliding sleeve (17), and the other end of the return spring (18) is connected to the rear of the pressure rod (14).

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