A remote-controlled external thread quick lifting device

Abstract

The present invention relates to the field of remote control maintenance technology, and in particular to a remote control external thread quick lifting device that can be used to lift heavy objects in the nuclear industry; the lifting device includes a load-bearing lifting system, a remote control power supply system and a drive system that are integrated and installed in an outer movable cover and are cylindrical in shape as a whole, and the remote control power supply system and the drive system are electrically connected; when the present invention is implemented in the lifting work, the movable external thread gripper in a closed state cooperates with the bolt with external threads on the top of the load, and the grasping action during lifting does not require electric or pneumatic drive, but is purely mechanically driven. When it is to be loosened, it only needs the remote control drive mechanism to realize the axial upward movement of the movable external thread gripper and then be opened. The entire lifting process not only realizes remote control operation, avoiding the harm caused by radiation in the working environment to the operator working at close range, but also can meet the goal of bearing large loads and meet the requirements of remote control maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of remote control maintenance, in particular to a remote control external thread quick lifting device which can be applied to lifting heavy objects in the nuclear industry. Background Art

[0002] Since scientific research requires continuous development and exploration, the presence of special substances or special processes often results in a high level of radiation in the working environment, which can cause irreversible damage to the environment and the health of workers. Therefore, in order to reduce or avoid the damage caused by radiation, R&D workers will set the working environment to a deep well type, and allow workers to remotely maintain objects in the deep well radiation environment from outside the deep well. In order to transport and move the parts in service in the deep well during maintenance, remote control lifting is the most common operation. However, long-distance operation limits the operator from conveniently connecting the overhead crane and the hoisted object through manual operation.

[0003] For example, the target station. The function of the target station is to allow the high-energy proton beam accelerated by the accelerator to bombard the heavy metal target and produce high-energy neutrons through the spallation effect. Its working environment is a large environment with radioactive characteristics. Due to the high radiation intensity of the target station, the isolation and enclosure of the top hall environment must be ensured. However, the radioactivity and enclosure greatly increase the difficulty of technical personnel to operate inside the top hall environment. The top hall of the target station is a working area for transporting waste materials generated during the operation of the target station. In fact, it is a place with stronger radiation. In order to minimize the radiation damage of the top hall of the target station to the operator, the environment or other equipment, it is set up as a special transportation environment. However, the hoisting work of the moderator reflector in the top hall of the target station must be completed in this area. Therefore, the hoisting work of the top hall of the target station is a job with poor operating environment and high operating difficulty, and there is a contradiction in the high difficulty of operating in the deep well environment. Summary of the invention

[0004] Aiming at the problems of strong radiation, poor safety performance and great operating difficulty in remote-controlled lifting in the top hall of the target station in a deep-well radiation environment, the present invention aims to provide a rapid lifting device, in particular a remote-controlled external thread rapid lifting device.

[0005] The technical solution adopted by the present invention is: a remote-controlled external threaded quick lifting device, the lifting device includes a load-bearing lifting system, a remote-controlled power supply system and a drive system which are integrated and installed in an outer movable cover and are cylindrical as a whole, and the remote-controlled power supply system and the drive system are electrically connected.

[0006] The top of the load-bearing lifting system is provided with a lifting eye that can be connected to a crane, and the main structure includes a rigid connection structure for transmitting axial load and a movable external threaded gripper; the lifting eye and the rigid connection structure for transmitting axial load are rigidly connected by threads; the movable external threaded gripper and the inner inclined surface of the rigid connection structure and the guide pin of the outer movable cover are positioned and installed at the bottom of the entire device.

[0007] The remote control power supply system includes an energy storage device, a remote control signal receiver, and a power switch installed in the load-bearing lifting system. The energy storage device includes a battery and a charging and discharging connector, wherein the remote control signal receiver, the power switch, and the energy storage device are all installed on the upper part of the load-bearing lifting system and are arranged below the lifting point of the lifting eye.

[0008] The driving system mainly includes an electric drive actuator, an external thread component, a fixed ring, a movable ring and a preload spring. The electric drive actuator body is fixed on the fixed ring, the output shaft of the electric drive actuator is connected to the movable ring by connecting the external thread component, the outer movable cover is connected to the movable ring, and the preload spring is installed between the fixed ring and the movable ring.

[0009] When the lifting work is carried out, the movable external thread gripper in the closed state cooperates with the bolt with external thread on the top of the load, and the load of the load is transmitted from the inclined surface at the bottom of the load lifting system to the top lifting ring through the movable external thread gripper.

[0010] The movable external thread gripper is composed of a plurality of metal ring blocks with internal threads, preload springs outside the ring blocks, and radial guide pins for transmitting axial driving force.

[0011] The metal ring blocks are composed of three pieces. When the metal ring blocks are closed along the axial direction, they can form a nut-like ring shape, which can grasp the corresponding bolts with external threads and connect them through the matching between the threads.

[0012] One end of the guide pin abuts against the movable outer cover to form an axially movable movable connection, and the other end is radially inserted into the movable external thread gripper to transmit axial force to make the movable external thread gripper move in the axial direction.

[0013] The number of the guide pins is the same as the number of the metal ring blocks, and each guide pin corresponds to a metal ring block.

[0014] The outer movable cover serves as a transmission mechanism for the upward movement force of the movable external thread gripper; after the movable external thread gripper is acted upon by the upward driving force, it will move upward, then contact the inclined surface of the rigid connection structure from above, and be acted upon by the radial force, and then the metal ring blocks will be stretched open.

[0015] The electric drive actuator is an electromagnet or a linear motor.

[0016] The connecting external thread component also includes a matching anti-loosening nut.

[0017] The diameter of the preload spring matches the output shaft of the electric drive actuator.

[0018] The beneficial effects of the present invention are as follows: when the present invention is implementing the lifting work, the movable external threaded gripper in a closed state cooperates with the bolt with external threads on the top of the load, and the lifting device locks the lifted object through the action of gravity. The load of the lifted object is transmitted from the inclined surface at the bottom of the load-bearing lifting system to the top lifting ring through the movable external threaded gripper. The grabbing action during lifting does not require electric or pneumatic drive, but is purely mechanically driven. When it is to be loosened, it is only necessary to remotely control the driving mechanism to realize the axial upward movement of the movable external threaded gripper and then open it. The entire lifting process not only realizes remote control operation to avoid the harm of the operator caused by radiation in the working environment when working at close range, but also the size of the thread of the movable external threaded gripper of the lifting device of the present invention can be tailored according to the weight of the load, so it can withstand the goal of large load and meet the requirements of remote control maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure along the GG direction.

[0021] Figure 3 yes Figure 2 Schematic diagram of the local enlarged structure of part A.

[0022] Figure 4 It is a structural schematic diagram of the load hoisting system in the present invention.

[0023] Notes on the attached figures: 1-load lifting system, 11-eyelet, 12-movable external thread gripper,

[0024] 2-remote control power supply system, 3-driving system, 4-external movable cover, 51, 52-rigid connection structure, 6-guide pin, 41-external movable cover inclined plane, 31-electric drive actuator, 32-external threaded component, 33-fixing ring, 34-movable ring, 35-preload spring. DETAILED DESCRIPTION

[0025] The specific implementation mode of the present invention will be described in detail below with reference to the accompanying drawings of the specification, taking remote control lifting in the top hall of the target station in a deep well radiation environment as a specific embodiment.

[0026] like Figure 1-4As shown, a remote-controlled external thread quick lifting device comprises a load-bearing lifting system, a remote-controlled power supply system and a drive system which are integrated and installed in an outer movable cover and are cylindrical in shape as a whole. The remote-controlled power supply system and the drive system are electrically connected, and the remote-controlled power supply system can receive signals transmitted over long distances to enable the drive system to work.

[0027] The top of the load-bearing hoisting system is provided with a lifting eye that can be connected to a crane. The lifting eye can be connected to a crane through a rope, and the crane moves with the hoisted object. The main structure of the load-bearing hoisting system includes a rigid connection structure 51 for transmitting axial load and a movable external threaded gripper; the lifting eye and the rigid connection structure 51 for transmitting axial load are rigidly connected by threads; the movable external threaded gripper is matched with the inner inclined surface of the rigid connection structure and the outer movable cover inclined surface and is positioned and installed at the bottom of the entire device through guide pins. The movable external thread gripper is composed of multiple metal ring blocks with internal threads, pre-tightening springs outside the ring blocks, and radial guide pins that transmit axial driving force; the number of the guide pins is the same as the number of metal ring blocks, and each guide pin corresponds to a metal ring block. The metal ring blocks can be three or four. When the metal ring blocks are closed along the axial direction, they can form a nut-like ring shape, which can grasp the corresponding bolts with external threads and connect them through the matching between the threads. The movable external thread gripper and the grasped external threaded bolts exist in pairs, and the threads of the two can be designed according to the weight of the lifting load, so the movable external thread gripper is highly applicable, so that the entire lifting device can withstand loads of large or small weights.

[0028] The remote control power supply system includes an energy storage device, a remote control signal receiver, and a power switch installed in the load-bearing hoisting system. The energy storage device includes a battery and a charging and discharging connector, wherein the remote control signal receiver, the power switch, and the energy storage device are all installed on the upper part of the load-bearing hoisting system and are arranged below the hoisting point of the lifting eye. The remote control power supply system itself has a power supply and a remote control system receiving system, and can control the power switch through a remote control; that is, the function of the remote control power supply system is mainly to receive signals transmitted over long distances to determine whether to provide driving power for the driving system.

[0029] The driving system mainly includes an electric drive actuator, an external thread component, a fixed ring, a movable ring and a pre-tensioning spring. The electric drive actuator body is fixed on the fixed ring. The electric drive actuator is an electromagnet or a linear motor. The output shaft of the electric drive actuator is connected to the movable ring by connecting the external thread component. The connecting external thread component also includes a locking nut matched therewith. The outer movable cover is connected to the movable ring. The pre-tensioning spring is installed between the fixed ring and the movable ring. The diameter of the pre-tensioning spring is matched with the output shaft of the electric drive actuator. The driving device mainly receives the power transmitted by the remote control power supply system to start the electric drive actuator and drive the axial movement of the movable external thread gripper. Since one end of each guide pin inserted into the metal ring block is against the movable outer movable cover, an axially movable movable connection is formed, and the other end is radially inserted into the movable external thread gripper to transmit axial force to make the movable external thread gripper move in the axial direction.

[0030] When carrying out the lifting work, the movable external thread gripper in the closed state cooperates with the bolt with external threads on the top of the load, and the load of the load is transmitted from the inclined surface at the bottom of the load-bearing lifting system to the top lifting ring through the movable external thread gripper; the outer movable cover serves as a transmission mechanism for the upward movement force of the movable external thread gripper; after the movable external thread gripper is acted upon by the upward driving force, it will move upward, and then contact the inclined surface of the rigid connection structure 52 from above, and be acted upon by the radial force, and then the metal ring blocks will be stretched open.

[0031] When the lifting work is carried out in the top hall, the lifting ring only needs to be connected to the overhead crane. Bolts will be pre-arranged above the object to be lifted. Due to the effect of gravity, the lifting device will move vertically downward. When the movable external thread gripper grabs the bolt, the bolt passes through the bottom of the outer movable cover and cooperates with the movable external thread gripper; the movable external thread gripper is in a normally closed state due to the effect of the preload spring. When the bolt enters, the metal ring blocks of the movable external thread gripper are stretched open. When the bolt is in place, the outer ring has a preload spring and a guide pin to provide radial force, and the movable external thread gripper is in a tightened grasping state. At this time, the rope can be retracted over a long distance to lift the object to be lifted and transported and moved by the overhead crane; when the movable external thread gripper needs to be released, the remote control power supply system starts the power switch after receiving the signal to provide the driving system with a working signal and power. The driving system drives the radially arranged guide pin to move in a straight line along the axial direction, so that the movable external thread gripper moves upward, so that the metal ring block contacts the bottom inclined surface of the rigid connection structure 52 and stretches open, thereby realizing the disengagement action of the external thread, and then the bolt falls out.

[0032] The present invention is a remote-controlled external thread quick lifting system with strong load-bearing capacity and remote control, which is specially used for the maintenance of moderator reflectors. When working, the system is lifted by vertical lifting equipment, such as an overhead crane, and vertically falls on the external bolts on the top of the object to be lifted. The object to be lifted is locked by gravity to achieve the lifting function. When the external thread needs to be loosened, the drive system is powered on by the remote controller to loosen the thread. The present invention adopts an integrated design, which only needs to be connected to the overhead crane, and does not need to connect cables and signal lines, so that remote control can be achieved. The movable external thread gripper and the thread of the bolt are customizable in size and can be adjusted according to the size of the external thread. The thread specifications are customized according to the weight of the hoisted object; the hoisting device of the present invention can realize rapid hoisting, and can be connected with the hoisted object within 10 seconds; and the load that can be borne is directly determined by the axial compression yield strength of the movable external thread gripper, so that lifting and hoisting of ultra-large loads can be achieved; the entire hoisting process not only realizes remote control operation, avoiding the harm of operators working at close range and being caused by radiation in the working environment, but also the size of the thread of the movable external thread gripper of the hoisting device of the present invention can be tailored according to the weight of the load, so it can withstand the goal of large load weight, fully meet the maintenance requirements, and block the radiation between the operator and the radiation source.

[0033] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Technical personnel in this industry can make some deformation and modifications under the inspiration of this technical solution. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A remote-controlled external thread quick lifting device, characterized in that: The hoisting device comprises a load-bearing hoisting system, a remote control power supply system and a drive system which are integrated and installed in the outer movable cover and are cylindrical in shape as a whole. The remote control power supply system and the drive system are electrically connected; The top of the load-carrying lifting system is provided with a lifting eye that can be connected to a crane, and the main structure includes a rigid connection structure for transmitting axial load and a movable external thread gripper; wherein the lifting eye and the rigid connection structure for transmitting axial load are rigidly connected by threads; the movable external thread gripper and the inner inclined surface of the rigid connection structure and the outer movable cover are positioned and installed at the bottom of the whole device through guide pins; The remote control power supply system comprises an energy storage device, a remote control signal receiver, and a power switch installed in the load-carrying hoisting system. The energy storage device comprises a battery and a charging and discharging connector. The remote control signal receiver, the power switch, and the energy storage device are all installed on the upper part of the load-carrying hoisting system and are arranged below the hoisting point of the lifting eye. The driving system mainly includes an electric drive actuator, an external thread component, a fixed ring, a movable ring and a preload spring. The electric drive actuator body is fixed on the fixed ring, the output shaft of the electric drive actuator is connected to the movable ring by connecting the external thread component, the outer movable cover is connected to the movable ring, and the preload spring is installed between the fixed ring and the movable ring. When carrying out the lifting work, the movable externally threaded gripper in a closed state cooperates with the bolt with external threads on the top of the load, and the load of the load is transmitted from the inclined surface at the bottom of the load-bearing lifting system to the top lifting ring through the movable externally threaded gripper; the movable externally threaded gripper is composed of multiple metal ring blocks with internal threads, pre-tightening springs outside the ring blocks, and radial guide pins that transmit axial driving force; the metal ring blocks are three pieces, and when the metal ring blocks are closed along the axial direction, they can form a nut-like circular ring shape, which can grasp the corresponding bolt with external threads and be connected through the cooperation between the threads; one end of the guide pin is against the outer movable cover to form an axially movable movable connection, and the other end is radially inserted into the movable externally threaded gripper to transmit axial force so that the movable externally threaded gripper moves in the axial direction.

2. A remote-controlled external thread quick lifting device according to claim 1, characterized in that: The number of the guide pins is the same as the number of the metal ring blocks, and each guide pin corresponds to a metal ring block.

3. A remote-controlled external thread quick lifting device according to claim 1, characterized in that: The outer movable cover serves as a transmission mechanism for the upward movement force of the movable external thread gripper; after being acted upon by the upward driving force, the movable external thread gripper will move upward, then contact the inclined surface of the upper rigid connection structure, and then be acted upon by the radial force, and then the metal ring blocks will be stretched open.

4. A remote-controlled external thread quick lifting device according to claim 1, characterized in that: The electric drive actuator is an electromagnet or a linear motor.

5. The remote-controlled external thread quick lifting device according to claim 1, characterized in that: The connecting external thread component also includes a matching anti-loosening nut.

6. A remote-controlled external thread quick lifting device according to claim 1, characterized in that: The diameter of the preload spring matches the output shaft of the electric drive actuator.

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