A nuclear power single failure protection trolley

Abstract

The utility model discloses a nuclear power single fault protection dolly, including dolly frame, walking mechanism, hoisting mechanism and hanger mechanism, walking mechanism includes walking wheel and walking motor, and walking wheel rotatoryly connects in both sides of dolly frame, and walking motor installs on dolly frame, and walking motor drives walking wheel rotation, hoisting mechanism includes reel, speed reducer and hoisting motor, and reel rotatoryly connects in the top of dolly frame, and both ends of reel are all wound with wire rope, and speed reducer installs in one end of reel, and hoisting motor installs on speed reducer, hanger mechanism includes lifting hook, movable pulley group, fixed pulley group, reversing pulley group and balance arm, and the wire rope of reel passes through movable pulley group, fixed pulley group after, and reversing pulley group is fixedly connected in the end of balance arm after, the utility model discloses can when a column wire rope appears single fault, another column wire rope still can continue to use, at least can guarantee hoisting article safe placement, so that the follow -up maintenance work is carried out.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, and in particular to a nuclear power plant single fault protection trolley. Background Technology

[0002] Nuclear ring cranes are special lifting equipment used during the construction and operation of nuclear power plants to provide lifting services for the installation, maintenance, and auxiliary refueling of heavy equipment in the reactor building. The items they lift are highly dangerous, and the stability of the lifting must be ensured. Moreover, the installation, maintenance, and other work need to be completed within a specified period. Therefore, it is best to have high working efficiency to ensure the normal progress of the overall work plan and reduce losses during maintenance. Utility Model Content

[0003] The purpose of this utility model is to provide a nuclear power plant single fault protection trolley. When a single fault occurs in one steel wire rope, the other steel wire rope can still be used, at least ensuring the safe placement of hoisted items so that subsequent maintenance work can be carried out.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a nuclear power plant single fault protection trolley, comprising a trolley frame, a traveling mechanism, a lifting mechanism, and a lifting device mechanism. The traveling mechanism includes traveling wheels and a traveling motor. The traveling wheels are rotatably connected to both sides of the trolley frame, and the traveling motor is mounted on the trolley frame, driving the traveling wheels to rotate. The lifting mechanism includes a drum, a reducer, and a lifting motor. The drum is rotatably connected to the top of the trolley frame, and steel wire ropes are wound around both ends of the drum. The reducer is mounted at one end of the drum, and the lifting motor is mounted on the reducer. The lifting device mechanism includes a hook, a movable pulley group, a fixed pulley group, a reversing pulley group, and a balance arm. The movable pulley group is located above the hook. There are two movable pulley groups, referred to as the first movable pulley group and the second movable pulley group, which are symmetrically arranged. The fixed pulley group is... On the trolley frame, the fixed pulley group is set in the same direction as the movable pulley group. There are two fixed pulley groups, referred to as the first fixed pulley group and the second fixed pulley group, which are symmetrically arranged. The reversing pulley group and the balance arm are respectively set on both sides of the fixed pulley group. The reversing pulley group is set perpendicular to the fixed pulley group. The reversing pulley group includes a first reversing wheel and a second reversing wheel. The balance arm is hinged to the trolley frame. The wire rope at one end of the drum passes through the first movable pulley group and the first fixed pulley group, then passes through the first reversing wheel, then passes through the second movable pulley group and the second fixed pulley group, and is then fixedly connected to one end of the balance arm. The wire rope at the other end of the drum passes through the second movable pulley group and the second fixed pulley group, then passes through the second reversing wheel, then passes through the first movable pulley group and the first fixed pulley group, and is then fixedly connected to the other end of the balance arm.

[0005] Optionally, the winding method of the wire rope in the first movable pulley block and the second movable pulley block is opposite, and the winding method of the wire rope in the first fixed pulley block and the second fixed pulley block is opposite.

[0006] Optionally, each movable pulley group is provided with four movable pulleys, and the movable pulleys in two movable pulley groups are respectively referred to as the first movable pulley, the second movable pulley, the third movable pulley, the fourth movable pulley, the fifth movable pulley, the sixth movable pulley, the seventh movable pulley, and the eighth movable pulley; each fixed pulley group is provided with two fixed pulleys, and the fixed pulleys in two fixed pulley groups are respectively referred to as the first fixed pulley, the second fixed pulley, the third fixed pulley, and the fourth fixed pulley; the wire rope at one end of the drum passes sequentially over the first movable pulley, the first fixed pulley, the second movable pulley, the first reversing pulley, the seventh movable pulley, the fourth fixed pulley, and the eighth movable pulley before being fixedly connected to one end of the balance arm; the wire rope at the other end of the drum passes sequentially over the sixth movable pulley, the third fixed pulley, the fifth movable pulley, the second reversing pulley, the fourth movable pulley, the second fixed pulley, and the third movable pulley before being fixedly connected to the other end of the balance arm.

[0007] Optionally, the travel motor is mounted on the inside of the trolley frame.

[0008] Optionally, brakes are installed on the drum, reducer, and motor.

[0009] The nuclear power plant single fault protection trolley of this utility model has the following advantages: (1) The two wire ropes are symmetrically wound and do not interfere with each other. When one wire rope has a single fault, the other wire rope can still maintain the balance of the hook, place the hoisted items stably in a safe position, avoid accidents, and provide conditions for subsequent maintenance.

[0010] (2) The winding method of the wire rope can ensure that the single-row wire rope has sufficient stability.

[0011] (3) The inner walking motor can reduce the width of the trolley, making the structure of the trolley more compact. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a top view of the present invention.

[0014] Figure 3 This is a simplified diagram illustrating the winding method of steel wire rope. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings. In the description of the present invention, terms such as “center”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, and “outer” 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 the present invention 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 the present invention.

[0016] The terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0017] like Figures 1-3 As shown, a nuclear power plant single-fault protection trolley includes a trolley frame 1, a traveling mechanism, a lifting mechanism 2, and a hoisting mechanism 3. The traveling mechanism includes traveling wheels 4 and a traveling motor 5. The traveling wheels 4 are rotatably connected to both sides of the trolley frame 1, and the traveling motor 5 drives the traveling wheels 4 to rotate. The traveling motor 5 is installed on the inner side of the trolley frame 1, reducing the width of the trolley and making the trolley structure more compact. The lifting mechanism 2 includes a drum 6, a reducer 7, and a lifting motor 8. The drum 6 is rotatably connected to the top of the trolley frame 1, and steel wire ropes 29 are wound around both ends of the drum 6. The reducer 7 is installed at one end of the drum 6, and the lifting motor 8 is installed on the reducer 7. Brakes 9 are installed on the drum 6, the reducer 7, and the motor. When a stall occurs, the three brakes 9 brake simultaneously to quickly stop the descent of the heavy object and ensure production safety.

[0018] The lifting mechanism 3 includes a hook 10, a movable pulley block 11, a fixed pulley block 12, a reversing pulley block 13, and a counterweight arm 14. The movable pulley block 11 is positioned above the hook 10. There are two movable pulley blocks 11, referred to as the first movable pulley block and the second movable pulley block, which are symmetrically arranged. The fixed pulley block 12 is mounted on the trolley frame 1. The fixed pulley block 12 is positioned in the same direction as the movable pulley block 11. There are two fixed pulley blocks 12, referred to as the first fixed pulley block and the second fixed pulley block, which are symmetrically arranged. The winding patterns of the wire rope 29 in the first and second movable pulley blocks are opposite, as are the winding patterns of the wire rope 29 in the first and second fixed pulley blocks. The reversing pulley group 13 and the balance arm 14 are respectively arranged on both sides of the fixed pulley group 12. The reversing pulley group 13 is arranged perpendicular to the fixed pulley group 12. The reversing pulley group 13 includes a first reversing wheel 15 and a second reversing wheel 16. The balance arm 14 is hinged to the trolley frame 1. Each movable pulley group 11 is provided with four movable pulleys. The movable pulleys in the two movable pulley groups 11 are respectively called the first movable pulley 17, the second movable pulley 18, the third movable pulley 19, the fourth movable pulley 20, the fifth movable pulley 21, the sixth movable pulley 22, the seventh movable pulley 23, and the eighth movable pulley 24. Each fixed pulley group 12 is provided with two fixed pulleys. The fixed pulleys in the two fixed pulley groups 12 are respectively called the first fixed pulley 25, the second fixed pulley 26, the third fixed pulley 27, and the fourth fixed pulley 28. The steel wire rope 29 at the left end of the drum 6 passes sequentially over the first movable pulley 17, the first fixed pulley 25, the second movable pulley 18, the first reversing pulley 15, the seventh movable pulley 23, the fourth fixed pulley 28, and the eighth movable pulley 24 before being fixedly connected to the right end of the balance arm 14; the steel wire rope 29 at the right end of the drum 6 passes sequentially over the sixth movable pulley 22, the third fixed pulley 27, the fifth movable pulley 21, the second reversing pulley 16, the fourth movable pulley 20, the second fixed pulley 26, and the third movable pulley 19 before being fixedly connected to the left end of the balance arm 14.

[0019] The individual winding pattern of each row of wire ropes 29 is symmetrical about the center of the drum 6. The winding patterns of the two rows of wire ropes 29 are also symmetrical about the center of the drum 6, and the two rows of wire ropes 29 do not interfere with each other. This winding pattern gives the hook 10 sufficient stability. Even if one row of wire ropes 29 fails, the other row of wire ropes 29 can maintain the balance of the hook 10 and complete the safe placement of the heavy object without affecting the overall progress of the work, and provide convenient conditions for subsequent maintenance.

[0020] The embodiments described above are merely some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the protection scope of this utility model.

Claims

1. A nuclear power plant single fault protection trolley, characterized in that: The system includes a trolley frame, a traveling mechanism, a hoisting mechanism, and a lifting device mechanism. The traveling mechanism includes traveling wheels and a traveling motor. The traveling wheels are rotatably connected to both sides of the trolley frame, and the traveling motor is mounted on the trolley frame, driving the traveling wheels to rotate. The hoisting mechanism includes a drum, a reducer, and a hoisting motor. The drum is rotatably connected to the top of the trolley frame, with wire rope wound around both ends. The reducer is mounted at one end of the drum, and the hoisting motor is mounted on the reducer. The lifting device mechanism includes a hook, a movable pulley block, a fixed pulley block, a reversing pulley block, and a counterweight arm. The movable pulley block is located above the hook. There are two movable pulley blocks, referred to as the first movable pulley block and the second movable pulley block, which are symmetrically arranged. The fixed pulley blocks are located on the trolley frame, and their orientation is... The movable pulleys are arranged in the same direction, and there are two fixed pulleys, referred to as the first fixed pulley group and the second fixed pulley group, which are symmetrically arranged. The reversing pulley group and the balance arm are respectively arranged on both sides of the fixed pulley group. The reversing pulley group is perpendicular to the fixed pulley group. The reversing pulley group includes a first reversing wheel and a second reversing wheel. The balance arm is hinged to the trolley frame. The wire rope at one end of the drum passes through the first movable pulley group and the first fixed pulley group, then passes through the first reversing wheel, then passes through the second movable pulley group and the second fixed pulley group, and is fixedly connected to one end of the balance arm. The wire rope at the other end of the drum passes through the second movable pulley group and the second fixed pulley group, then passes through the second reversing wheel, then passes through the first movable pulley group and the first fixed pulley group, and is fixedly connected to the other end of the balance arm.

2. The nuclear power plant single fault protection trolley as described in claim 1, characterized in that: The winding method of the wire rope in the first and second movable pulley blocks is opposite, and the winding method of the wire rope in the first and second fixed pulley blocks is also opposite.

3. The nuclear power plant single fault protection trolley as described in claim 1 or 2, characterized in that: Each movable pulley group contains four movable pulleys, and the movable pulleys in two movable pulley groups are respectively called the first movable pulley, the second movable pulley, the third movable pulley, the fourth movable pulley, the fifth movable pulley, the sixth movable pulley, the seventh movable pulley, and the eighth movable pulley; each fixed pulley group contains two fixed pulleys, and the fixed pulleys in two fixed pulley groups are respectively called the first fixed pulley, the second fixed pulley, the third fixed pulley, and the fourth fixed pulley; the wire rope at one end of the drum passes sequentially over the first movable pulley, the first fixed pulley, the second movable pulley, the first reversing pulley, the seventh movable pulley, the fourth fixed pulley, and the eighth movable pulley before being fixedly connected to one end of the balance arm; the wire rope at the other end of the drum passes sequentially over the sixth movable pulley, the third fixed pulley, the fifth movable pulley, the second reversing pulley, the fourth movable pulley, the second fixed pulley, and the third movable pulley before being fixedly connected to the other end of the balance arm.

4. The nuclear power plant single fault protection trolley as described in claim 1, characterized in that: The walking motor is installed on the inside of the trolley frame.

5. The nuclear power plant single fault protection trolley as described in claim 1, characterized in that: Brakes are installed on the drum, reducer, and motor.

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