CN203079554U - A loading and unloading machine auxiliary monorail crane for nuclear power plant - Google Patents

Abstract

The utility model relates to a fuel operation of nuclear power plant and storage system equipment, concretely relates to nuclear power plant is with supplementary monorail crane of loading and unloading machine. The hoisting device structurally comprises a hoisting frame, wherein two ends of the hoisting frame are connected with a hoisting transmission mechanism through a left support plate and a right support plate, the middle part of the hoisting frame is connected with a fixed hoisting device through a hook plate, the lower end of the fixed hoisting device is connected with one end of a steel wire rope, the other end of the steel wire rope is wound on a winding drum of the hoisting transmission mechanism, and the steel wire rope is connected with a hook assembly through a pulley; the lower part of a lifting beam of the lifting frame is provided with a rope arranging device, and the upper part of the lifting beam of the lifting frame is provided with a walking limit switch and a lifting limit switch; the upper part of the lifting frame is connected with a walking transmission mechanism, and two ends of the walking transmission mechanism are provided with buffer devices. The utility model discloses a set up two wire rope, cam limit switch and encoder subassembly and two stopper and realize the required safety protection function of operation technology.

Description

A loading and unloading machine auxiliary monorail crane for nuclear power plant

technical field

The utility model relates to fuel operation and storage system equipment in a nuclear power plant, in particular to a loading and unloading machine auxiliary monorail crane for a nuclear power plant.

Background technique

During the refueling process of nuclear reactor shutdown, it is necessary to use a series of special tools to operate and inspect the fuel assembly and related components, control rod drive rod and irradiated sample plug in the pressure vessel, so it is necessary to set up a Electric assisted monorail crane, used for lifting special tools. According to the safety and reliability requirements of the fuel operation process, the crane should have safety protection functions such as single fault protection, load protection, speed protection, and multiple limit protection.

In the process of realizing the above-mentioned auxiliary monorail crane functions, the inventors found that there is a lack of auxiliary monorail cranes for loading and unloading machines that meet the safety protection requirements of nuclear power plant fuel operation processes in the prior art.

Utility model content

The purpose of the utility model is to address the defects of the prior art, to provide a loading and unloading machine auxiliary monorail crane for nuclear power plants, which is used for lifting special tools to operate related operating objects in the reactor, and to meet the safety protection requirements of nuclear power plant fuel operation processes.

The technical scheme of the utility model is as follows: a loading and unloading machine auxiliary monorail crane for a nuclear power plant, including a lifting frame, the lifting transmission mechanism is connected at both ends of the lifting frame through left and right support plates, and connected and fixed in the middle of the lifting frame through a hook plate Lifting device, the lower end of the fixed lifting device is connected with one end of the wire rope, the other end of the wire rope is wound on the drum of the lifting transmission mechanism, and the wire rope is connected with the hook assembly through a pulley; the lower part of the lifting beam of the lifting frame is equipped with a rope arrangement, and the lifting frame The upper part of the lifting beam is provided with a travel limit switch and a lifting limit switch; the upper part of the lifting frame is connected with a travel transmission mechanism, and buffer devices are provided at both ends of the travel transmission mechanism.

Further, the aforementioned nuclear power plant uses a loading and unloading machine auxiliary monorail crane, wherein, the lifting frame is made of a square hollow section steel as a lifting beam, and is welded on the lifting beam through the end plate, lifting plate, hook plate and The bottom plate is respectively connected with a lifting transmission mechanism, a traveling transmission mechanism, a fixed lifting device and a rope arrangement.

Further, the aforementioned nuclear power plant uses a loading and unloading machine auxiliary monorail crane, wherein the lifting transmission mechanism includes a reel, a transmission shaft, a lifting motor, a reducer, and a safety brake; the lifting motor with a running brake passes through the shaft coupling The reducer is connected to the high-speed shaft of the reducer, and the low-speed shaft of the reducer cooperates with the transmission shaft installed on one side of the reel to drive the reel to rotate; the other side of the reel is connected to a safety brake for braking operation in case of an accident.

Further, the aforementioned nuclear power plant uses a loading and unloading machine auxiliary monorail crane, wherein the traveling transmission mechanism is composed of 4 traveling wheels and a driving mechanism, and the 4 traveling wheels include 2 driving wheels and 2 driven wheels, respectively Connected with 4 support plates, the driving motor of the traveling transmission mechanism is connected to the reducer, and the transmission gear is driven to rotate through the transmission shaft, and the transmission gear meshes with the gear on the driving wheel in the traveling wheel, thereby driving the movement of the traveling mechanism.

Further, the above-mentioned nuclear power plant uses a loading and unloading machine auxiliary monorail crane, wherein the fixed lifting device includes a lifting joint, a balance hanging plate, a load weighing sensor, and a broken rope detection proximity switch, and the lifting joint is a double-headed U-shaped The upper U-shaped groove is connected to the hook plate on the lifting frame through the load weighing sensor, the lower U-shaped groove is equipped with a balance hanging plate through a pin shaft, and two steel wire ropes are respectively connected to both ends of the balance hanging plate.

Further, the nuclear power plant uses a loading and unloading machine auxiliary monorail crane as described above, wherein the rope arrangement device is connected to the lifting frame through a bracket, and a round steel is used to press the drum steel wire rope, and there is limited installation on the support of the rope arrangement device. bit switch.

Further, in the aforementioned nuclear power plant auxiliary monorail crane for loading and unloading machines, a cam limit switch and an encoder assembly for monitoring the lifting speed and lifting height of the lifting mechanism are installed on the low-speed shaft side of the reducer of the lifting transmission mechanism.

The beneficial effects of the utility model are as follows: the auxiliary monorail crane for loading and unloading machines in nuclear power plants provided by the utility model mainly includes parts such as a lifting frame, a lifting mechanism, a walking mechanism, a fixed lifting device, and a rope arrangement. Limit switch and encoder assemblies and dual brakes are used to realize the safety protection functions required by the operating process. The equipment has safety protection functions such as single fault protection, load protection, speed protection, and multiple limit protection to ensure safe and reliable operation.

Description of drawings

Fig. 1 is a structural schematic diagram of a nuclear power plant auxiliary monorail crane for loading and unloading machines;

Fig. 2 is the structural representation of lifting frame;

Fig. 3 is the structural representation of lifting transmission mechanism;

Fig. 4 is a structural schematic diagram of the walking mechanism;

Fig. 5 is the structural representation of fixed hoisting device;

Fig. 6 is a schematic diagram of the structure of the limit device;

Fig. 7 is a schematic diagram of the installation structure of the cam limit switch and the encoder assembly.

In the figure: 1. lifting frame; 2. lifting transmission mechanism; 3. traveling transmission mechanism; 4. traveling limit switch; 5. fixed lifting device; 6. rope arrangement device; 7. steel wire rope; 8. hook assembly; 9 .Lifting beam; 10. Lifting plate; 11. End plate; 12. Bottom plate of lifting frame; 13. Hook plate; 14. Reel; 15. Oil pan; 16. Encoder and cam limit switch assembly; 17. Lifting hand wheel; 18. Lifting mechanism reducer; 19. Left support plate; 20. Connecting seat; 21. Lifting motor; 22. Right support plate; 23. Safety brake; Reducer; 26. Drive shaft of traveling mechanism; 27. Driving wheel; 28. Transmission gear; 29. Balance hanging plate; 30. Proximity switch; 31. Hoisting joint; 32. Load weighing sensor; 34. Switch lever; 35. Monorail beam of loading and unloading machine; 36. Buffer block; 37. Coupling shaft.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail.

Example

As shown in Figure 1, the auxiliary monorail crane of the loading and unloading machine is mainly composed of a lifting frame 1, a lifting transmission mechanism 2, a traveling running mechanism 3, a fixed lifting device 5, a rope arrangement 6, a hook assembly 8, a traveling limit switch 4 and a lifting mechanism. Limit devices such as limit switch 33 are formed.

As shown in Figure 2, the lifting frame 1 is a steel frame structure, and the material is high-strength structural steel. The lifting beam 9 is a hollow square steel, and an end plate 11 is welded at both ends of the lifting beam 9 for connecting the lifting transmission mechanism 2, and two lifting plates 10 are respectively welded on the front and rear sides of the lifting beam 9 for connecting the traveling mechanism 3 The middle part of the lifting beam 9 is welded with a hook plate 13 for connecting the fixed lifting device 5, and the bottom of the lifting beam 9 is welded with two bottom plates 12 for connecting the rope arrangement 6.

As shown in Figure 3, the lifting transmission mechanism 2 is a hoist structure. The reel 14 is a stainless steel cylinder on which a rope groove is processed for winding the wire rope 7 . Both sides of the reel 14 are installed on the left support plate 19 and the right support plate 22 through bearings. The left support plate 19 and the right support plate 22 are respectively connected with the two end plates 11 at the two ends of the lifting frame 1 through fasteners. One side of the reel 14 is connected with the low-speed shaft of the hoisting mechanism speed reducer 18 through a transmission shaft. A hoisting motor 21 with a running brake is connected to the high-speed shaft of the hoisting mechanism reducer 18 through a connecting seat 20, and is used to drive the reel 14 to rotate, thereby lifting the wire rope 7. The other output end of the high-speed shaft of the hoisting mechanism reducer 18 is used to install the hoisting handwheel 17, and the manual operation of the hoisting transmission mechanism 2 can be completed by the hoisting handwheel 7 in a fault state. An oil receiving pan 15 is arranged at the lower part of the hoisting mechanism reducer 18 to prevent the lubricating oil from dripping. The other end of the reel 14 is provided with an electromagnetic safety brake 23 for emergency braking operation when a failure occurs.

As shown in Figures 1 and 4, the auxiliary monorail crane can run laterally on the monorail beam 35 of the loading and unloading machine through the traveling mechanism 3 . The four hanging plates 24 are connected to the four lifting plates 10 on the lifting frame 1 by fasteners. Running gear motor and speed reducer 25 are connected by key with running gear transmission shaft 26, and 2 transmission gears 28 are housed on the running gear transmission shaft 26, and transmission gear 28 is meshed with driving wheel 27. Through the above transmission structure, the motor of the traveling mechanism and the reducer 25 can drive the two driving wheels 27 to rotate, rolling and running on the monorail beam 35 of the loading and unloading machine.

As shown in Figure 5, the hoisting joint 31 of the fixed hoisting device 5 is a double-headed U-shaped block, the upper U-shaped groove is connected with the hook plate 13 on the lifting frame through the load weighing sensor 32, and the lower U-shaped groove is installed through the pin shaft. Balance suspension plate 29 is arranged, and two steel wire ropes 7 link to each other with balance suspension plate 29 two ends respectively. Through the load weighing sensor 32, the lifting load can be monitored, and the load signal sent by it can be used to set the overload protection value, so as to realize the load protection of the equipment. A proximity switch 30 is respectively installed on both sides of the hoisting joint 31 to detect the balance state of the balance suspension plate 29. If the balance suspension plate 29 is unbalanced, one end of the balance suspension plate 29 will contact the proximity switch 30 on one side, and a signal will be sent. Alarm.

As shown in Figures 1 and 6, the auxiliary monorail crane for loading and unloading machines is provided with a rod-type travel limit switch 4 and a rod-type lift limit switch 33 . The travel limit switch 4 is installed on the top of the lifting frame 1, and the limit rod is placed vertically. At the extreme positions of the two ends of the monorail beam 35 of the loading and unloading machine, a switch lever 34 is respectively installed. When the limit switch 4 touches the switch lever 34 at the limit position, a signal is sent, and the crane stops running. The lifting limit switch 33 is located below the reel 14 and is used to limit the upper limit position of the hook assembly 8. When the hook assembly 8 rises to the lifting limit position, it will touch the switch lever of the lifting limit switch 33 to send a signal , the hook stops the lifting movement. A buffer 36 is respectively installed on the 4 suspension plates of the traveling transmission mechanism 3, which are used for buffering the stops at the limit positions on both sides.

As shown in Fig. 3 and Fig. 7, an encoder and a cam limit switch assembly 16 are installed at the low-speed shaft end of the hoisting mechanism reducer 18, and the assembly is connected with the low-speed shaft of the reducer through the coupling shaft 37 of the coupling to realize the connection with Synchronous rotation of the mandrel 14. The encoder is an absolute rotary encoder, which can control the position and speed of the lifting movement of the crane. At the same time, the cam limit switch can control the limit of 4 lifting positions. It can be used in conjunction with the encoder to realize the fuel operation process. Position limit, speed limit safety protection function.

Obviously, those skilled in the art can make various changes and modifications to the utility model without departing from the spirit and scope of the utility model. In this way, if these modifications and variations of the present utility model fall within the scope of the claims of the utility model and equivalent technologies, the utility model is also intended to include these modifications and variations.

Claims (7)

1. An auxiliary monorail crane for loading and unloading machines used in nuclear power plants, including a lifting frame. The two ends of the lifting frame (1) are connected to the lifting transmission mechanism (2) through left and right support plates (19, 22). ) is connected to the fixed lifting device (5) through the hook plate (13), the lower end of the fixed lifting device (5) is connected to one end of the wire rope (7), and the other end of the wire rope (7) is wound on the drum (14) of the lifting transmission mechanism On the top, the steel wire rope (7) is connected to the hook assembly (8) through a pulley, and the lower part of the lifting beam (9) of the lifting frame (1) is equipped with a rope arrangement (6), which is characterized in that: the lifting beam (9) of the lifting frame The upper part is provided with a travel limit switch (4) and a lifting limit switch (33); the upper part of the lifting frame (1) is connected with a travel transmission mechanism (3), and buffer devices (36) are provided at both ends of the travel transmission mechanism. 2. The auxiliary monorail crane for loading and unloading machines used in nuclear power plants as claimed in claim 1, characterized in that: the lifting frame (1) is made of a square hollow section steel as the lifting beam (9), which is welded to the lifting beam ( 9) The upper end plate (11), lifting plate (10), hook plate (13) and bottom plate (12) are respectively connected to the lifting transmission mechanism (2), walking transmission mechanism (3), fixed lifting device (5) and Rope arrangement (6). 3. The auxiliary monorail crane for loading and unloading machines used in nuclear power plants according to claim 1, characterized in that: the lifting transmission mechanism (2) includes a reel (14), a transmission shaft, a lifting motor (21), a reducer (18), safety brake (23); the hoisting motor (21) with a running brake is connected to the high-speed shaft of the reducer (18) through a coupling, and the low-speed shaft of the reducer is connected to the shaft installed on the side of the reel (14) The drive shafts cooperate to drive the reel (14) to rotate; the other side of the reel (14) is connected to a safety brake (23) for braking operation in an accident. 4. The auxiliary monorail crane for loading and unloading machines used in nuclear power plants as claimed in claim 1, characterized in that: the traveling transmission mechanism (3) is composed of 4 traveling wheels and a driving mechanism, and the 4 traveling wheels include 2 active Wheel (27) and 2 driven wheels are connected with 4 supporting plates (24) respectively, the driving motor of the traveling transmission mechanism is connected to the reducer (25), and the transmission gear (28) is driven to rotate through the transmission shaft (26). The transmission gear (28) meshes with the gear on the driving wheel (27) in the traveling wheels, thereby driving the traveling transmission mechanism (3) to move. 5. The auxiliary monorail crane for loading and unloading machines used in nuclear power plants according to claim 1, characterized in that: the fixed lifting device (5) includes a lifting joint (31), a balance hanging plate (29), a load weighing sensor (32), the broken rope detection proximity switch (30), the hoisting joint (31) is a double-headed U-shaped block, and the upper U-shaped groove passes through the load weighing sensor (32) and the hook plate (13) on the lifting frame (1) ) to be connected, the lower U-shaped groove is equipped with a balance hanging plate (29) by a bearing pin, and two steel wire ropes (7) are connected to each other with the balance hanging plate (29) two ends. 6. The auxiliary monorail crane for loading and unloading machines used in nuclear power plants as claimed in claim 1, characterized in that: said rope arranging device (6) is connected to the lifting frame (1) through a bracket, and is pressed by a round steel Drum wire rope (7), limit switch is installed on the rope arrangement (6) support. 7. The auxiliary monorail crane for loading and unloading machines used in nuclear power plants as claimed in claim 3, characterized in that: a cam limiter for monitoring the lifting speed and lifting height of the lifting mechanism is installed on the low-speed shaft side of the lifting transmission mechanism reducer (18). bit switch and encoder assembly (16).

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