CN116354239A

CN116354239A - Hoisting anti-collision device for large-sized hydraulic generator rotor and operation method

Info

Publication number: CN116354239A
Application number: CN202310236963.0A
Authority: CN
Inventors: 许梦浩; 曹崇梓; 李焱峰; 陈梓铭; 柳竺成; 覃鹏; 樊泳; 刘聪
Original assignee: Business Intelligence Of Oriental Nations Corp ltd; China Yangtze Power Co Ltd
Current assignee: Business Intelligence Of Oriental Nations Corp ltd; China Yangtze Power Co Ltd
Priority date: 2023-03-13
Filing date: 2023-03-13
Publication date: 2023-06-30

Abstract

A hoisting anti-collision device for a large-scale hydraulic generator rotor and an operation method thereof comprise a base, wherein a plurality of guide wheels are arranged on a vertical plate at the end part of the base, an anti-collision strip assembly is inserted between the guide wheels and is in sliding fit with the guide wheels, and the anti-collision strip assembly is locked with the base through a locking piece; the anti-collision strip component is provided with a pressure sensor; the other end of the base is provided with a rotor connecting mechanism which is used for being detachably arranged on the top end face of the rotor. The invention adopts the detachable anti-collision device to carry out anti-collision and early warning, is used for replacing the existing working mode of manually pumping the plugboard, reduces the operation risk, can carry out qualitative judgment on the collision position, carries out quantitative judgment on the collision force, and is beneficial to improving the working efficiency.

Description

Hoisting anti-collision device for large-sized hydraulic generator rotor and operation method

Technical Field

The invention belongs to the technical field of generator rotor hoisting anti-collision, and particularly relates to a large-scale hydraulic generator rotor hoisting anti-collision device and an operation method.

Background

The rotor is an important part of the hydraulic generator, lifting and reloading operations of the motor rotor are needed in the hydraulic generator maintenance process of the hydraulic generator of the hydropower station, and the hydraulic generator rotor of the large hydropower station usually has large geometric dimension and equipment tonnage, and the lifting operation is high in difficulty and risk.

For a large-sized hydroelectric generating set, the allowable gap range between a rotor and a stator in the hoisting process is smaller, and certain centering precision is required to be ensured in the hoisting process. In addition, once extrusion and collision occur to the rotor and the stator in the hoisting process, serious equipment damage accidents can be caused, and therefore the rotor and the stator are also protected physically in the hoisting process, and direct extrusion and collision of the rotor and the stator can be avoided when the hoisting accidents occur.

At present, in the process of lifting out and returning the generator rotor, a manual plugboard is mainly adopted to monitor the gap between the stator and the rotor and protect the rotor from collision, in the process, a maintenance construction team carries the plugboard to stand on the upper base surface of the stator, in the process of lifting the rotor, constructors need to continuously move the plugboard up and down to ensure that the rotor and the stator keep a sufficient distance, immediately shouting to report after the plugboard is found out that the plugboard is jammed and can not move, and then after the deviation direction of the rotor is judged, the lifting staff contacts bridge crane span personnel to finely adjust the rotor until the lifting and the returning are completed. The operation process has the defects that: 1. the staff stands on the periphery of the stator, no protective measures are taken on the periphery of the stator, and the personal safety of the staff cannot be guaranteed; 2. the plugboard is drawn by manpower, qualitative judgment is mainly carried out by operators, and the operation efficiency is low. Therefore, improvements to existing anti-collision measures and collision pre-warning measures are needed.

Disclosure of Invention

In view of the technical problems existing in the background art, the hoisting anti-collision device for the large-scale hydraulic generator rotor and the operation method provided by the invention adopt the detachable anti-collision device for anti-collision and early warning, are used for replacing the existing working mode of manually pumping the plugboard, not only reduce the operation risk, but also can perform qualitative judgment on the collision position, perform quantitative judgment on the collision force, and are beneficial to improving the working efficiency.

In order to solve the technical problems, the invention adopts the following technical scheme:

a hoisting anti-collision device for a large-sized hydraulic generator rotor comprises a base, wherein a plurality of guide wheels are arranged on a vertical plate at the end part of the base, an anti-collision strip assembly is inserted between the guide wheels and is in sliding fit with the guide wheels, and the anti-collision strip assembly is locked with the base through locking pieces; the anti-collision strip component is provided with a pressure sensor; the other end of the base is provided with a rotor connecting mechanism which is used for being detachably arranged on the top end face of the rotor.

In a preferred scheme, the rotor connecting mechanism comprises a universal adjusting foot connected with a base bottom plate, an adjusting handle is arranged at the screw head of the universal adjusting foot, and the adjusting handle is used for adjusting the extending amount of the universal adjusting foot; the rotor connecting mechanism further comprises a switch type magnetic seat, a screw rod with a handle, a tail seat plate, a guide rod and a box type sliding block linear bearing with a locking function, wherein the box type sliding block linear bearing with the locking function is arranged on the base, the box type sliding block linear bearing with the locking function is connected with the tail seat plate through the guide rod, the screw rod with the handle is arranged on the tail seat plate, and the screw rod with the handle is connected with the switch type magnetic seat.

In the preferred scheme, the anti-collision strip assembly is formed by splicing a plurality of anti-collision strips, two adjacent anti-collision strips are detachably connected, guide grooves matched with guide wheels are formed in two sides of each anti-collision strip, and an adsorption magnet and a pressure sensor are arranged on the back of each anti-collision strip and are used for being adsorbed on the outer column surface of the rotor; the contact of the pressure sensor protrudes out of the surface of the anti-collision strip but is not higher than the adsorption surface of the adsorption magnet.

In a preferred scheme, the pressure sensor is electrically connected with the wireless terminal module, and the wireless terminal module is arranged on the base; the wireless terminal module is used for receiving the pressure signal of the sensor and transmitting the pressure signal to the router in a wireless mode, the router is electrically connected with the server, the server carries out visual display on the pressure value through the display screen, and the wireless terminal module is used for taking a lifting operator as a reference for adjusting the position and the gesture of the rotor in the lifting process.

In the preferred scheme, both ends are provided with tongue-and-groove and tenon respectively about the crashproof strip, connect through tongue-and-groove and tenon mortise-and-tenon joint between two adjacent crashproof strips, and tongue-and-groove and tenon junction pass through the jackscrew locking.

An operation method of a hoisting anti-collision device for a large-scale hydraulic generator rotor comprises the following steps:

before the rotor is hoisted, the anti-collision device is placed on the top end face of the rotor, and the installation posture of the anti-collision device is adjusted through rotating an adjusting handle and a screw rod with a handle, so that a base bottom plate is parallel to the top end face of the rotor, and the anti-collision strip assembly is vertical to the end face of the rotor during downward insertion;

step two, the installation number of the anti-collision bars is selected according to the height of the rotor, and a plurality of anti-collision bars are assembled into an anti-collision bar assembly;

step three, installing a bumper assembly, wherein one surface of the bumper assembly, which is provided with the adsorption magnet, faces the outer cylindrical surface of the rotor when the bumper assembly is inserted downwards, and adjusting the installation position of the bumper assembly to enable the adsorption magnet of the bumper assembly to be adsorbed on the outer cylindrical surface of the rotor;

step four, locking the guide rod through a linear bearing with a locking box type sliding block and opening a switch type magnetic seat switch to enable the anti-collision device to be adsorbed and fixed;

step five, installing a plurality of anti-collision devices on the top end surface of the rotor according to the operation method of the step 1-4, and uniformly distributing the plurality of anti-collision devices on the top end surface of the rotor;

step six, when the rotor is hoisted and assembled, the wireless terminal module in each anti-collision device is only used for receiving signals transmitted by the pressure sensors arranged on the anti-collision strip components of the anti-collision device; the position of too small gap between the rotor and the stator can be known through the signal information received by the wireless terminal module arranged on the anti-collision device at different positions of the rotor;

and seventhly, when the gap between the rotor and the stator is too small, the pressure sensor is extruded, and when the gap exceeds a set threshold value, a display screen connected with the server sends out an alarm signal. The rotor hoisting device is used for realizing a real-time early warning function, and when the pressure value detected by the pressure sensor exceeds the limit, the rotor hoisting is proved to be unstable; and meanwhile, the anti-collision strip assembly is used for playing a physical protection role on the rotor and avoiding direct collision between the rotor and the stator.

The following beneficial effects can be achieved in this patent:

1. the anti-collision device has a detachable function, a plurality of anti-collision devices are uniformly distributed on the top end surface of the rotor along the peripheral direction of the rotor when in use, and the number of the required anti-collision devices is determined by the protection requirement; the anti-collision device not only can avoid the damage to the stator or the rotor caused by the mutual collision between the stator and the rotor, but also can monitor the collision position and the collision force, thereby being convenient for the staff to make proper adjustment.

2. This buffer stop convenient to detach, the anticollision strip subassembly can be according to the high adaptability adjustment of doing of rotor, replaces current manual work to draw the mode of picture peg, has reduced the operation risk.

Drawings

The invention is further illustrated by the following examples in conjunction with the accompanying drawings:

FIG. 1 is a three-dimensional block diagram of the present invention;

FIG. 2 is a three-dimensional block diagram of a bumper strip assembly in accordance with the present invention;

FIG. 3 is a three-dimensional block diagram of a bumper strip according to the present invention;

FIG. 4 is a diagram showing the effect of the present invention.

In the figure: the anti-collision device 3, the base 301, the universal adjusting foot 302, the adjusting handle 303, the linear bearing 304 with the locking box type sliding block, the guide rod 305, the tailstock plate 306, the switch type magnetic seat 307, the screw 308 with the handle, the guide wheel 309, the set screw 310, the wireless terminal module 311, the anti-collision strip assembly 312, the anti-collision strip 3121, the jackscrew 3122, the adsorption magnet 3123, the pressure sensor 3124, the tenon 31211, the tenon groove 31212, the guide groove 31213, the sliding groove 31214, the stator 4, the hoisting operation platform 5 and the rotor 6.

Detailed Description

Example 1:

the preferred scheme is shown in fig. 1 to 4, and the large-scale hydraulic generator rotor hoisting anti-collision device comprises a base 301, universal adjusting feet 302, an adjusting handle 303, a linear bearing 304 with a locking box type sliding block, a guide rod 305, a tailstock plate 306, a switch magnetic seat 307, a screw 308 with a handle, a guide wheel 309, a set screw 310, a wireless terminal module 311 and an anti-collision strip assembly 312. A plurality of guide wheels 309 are arranged on a vertical plate at the end part of the base 301, a bumper strip assembly 312 is inserted between the guide wheels 309, the bumper strip assembly 312 is in sliding fit with the guide wheels 309, and the bumper strip assembly 312 is locked with the base 301 through locking pieces; the bumper strip assembly 312 is provided with a pressure sensor 3124 or a micro-switch; the other end portion of the base 301 is provided with a rotor connection mechanism.

In this embodiment, the front end two sides of the base 301 bottom plate are connected with universal adjusting pins 302 through threads, the screw heads of the universal adjusting pins 302 are provided with adjusting handles 303, the extension amount of the universal adjusting pins 302 can be adjusted by rotating the adjusting handles 303, the bottom surface of the rear end of the base 301 bottom plate is provided with a linear bearing 304 with a locking box type sliding block, a guide rod 305 is arranged in the linear bearing 304 with the locking box type sliding block, the extension end of the guide rod 305 is connected with a tailstock plate 306, the tailstock plate 306 can be pushed and pulled to adjust the position of the guide rod 305 in the travel of the guide rod 305, the tailstock plate 306 is connected with a handle screw 308 through threads, the ends of the handle screw 308 are connected with a switch type magnetic base 307 through T-shaped grooves, a wireless terminal module 311 is further installed on the base 301 bottom plate, two sides of the base 301 vertical plate are respectively provided with a plurality of guide wheels 309, and a bumper assembly 312 can be inserted from the top and guided through the guide wheels 309 and locked through a set screw 310 installed on the base 301 vertical plate.

Further, the bumper strip assembly 312 is formed by splicing a plurality of bumper strips 3121, two adjacent bumper strips 3121 are detachably connected, guide grooves 31213 matched with the guide wheels 309 are formed on two sides of each bumper strip 3121, an adsorption magnet 3123 and a pressure sensor 3124 are arranged on the back surface of each bumper strip 3121, and the adsorption magnet 3123 is used for being adsorbed on the outer column surface of the rotor 6; the contact of the pressure sensor 3124 protrudes from the surface of the bumper strip 3121 but is not higher than the suction surface of the suction magnet 3123.

In this embodiment, the bumper strip assembly 312 is formed by splicing a plurality of bumper strips 3121, the required number of splices is determined by the required height of the protection rotor 6, and the structures at the two ends of the bumper strips 3121 are provided with ball heads or other mortise and tenon structures which can be used for mutually splicing, wherein jackscrews 3122 are installed at the splice positions of every two bumper strips for preventing the bumper strips 3121 from slipping. Preferably, the upper and lower ends of the bumper strip 3121 are respectively provided with a mortise 31212 and a tenon 31211, two adjacent bumper strips 3121 are connected by the mortise 31212 and the tenon 31211 mortise and tenon, and the joint of the mortise 31212 and the tenon 31211 is locked by the jackscrew 3122.

Guide grooves 31213 matched with the guide wheels 309 are formed on two side surfaces of the anti-collision strip 3121; a chute 31214 matched with the set screw 310 is arranged on one side of the front surface of the anti-collision strip 3121; the two ends of one side of the back of the anti-collision strip 3121 are provided with the adsorption magnets 3123, when the adsorption magnets 3123 at the two ends of the single anti-collision strip 3121 are attracted to the outer cylindrical surface of the rotor 6, the adsorption force provided by the adsorption magnets 3123 is only used for generating the friction force required for preventing the anti-collision strip 3121 from falling down due to gravity; the middle part of the back of the anti-collision strip 3121 is provided with a micro switch or a pressure sensor 3124 through a mounting groove, and the contact of the micro switch or the pressure sensor 3124 protrudes out of the surface of the anti-collision strip 3121 but is not higher than the adsorption surface of the adsorption magnet 3123, so that once the gap between the rotor 6 and the stator 4 is too small in the hoisting process, the rotor 6 is pressed to the anti-collision strip assembly 312, the anti-collision strip 3121 is deformed, and the contact of the micro switch or the pressure sensor 3124 contacts the surface of the rotor 6 to act, thereby triggering the early warning signal to be sent.

Further, the pressure sensor 3124 is electrically connected to the wireless terminal module 311, and the wireless terminal module 311 is mounted on the base 301; the wireless terminal module 311 is configured to receive a pressure signal from the sensor and wirelessly transmit the pressure signal to the router, where the router is electrically connected to the server, and the server visually displays a pressure value through the display screen, so that the pressure value is used as a reference for adjusting a position and an attitude of a rotor during hoisting by a hoisting operator.

In this embodiment, the pressure sensor is of the type: l10j type pressure sensor. The wireless terminal module 311 is a Zigbee wireless terminal module. The output of the pressure sensor is 1-1.5 mV signals, the mV signals are transmitted into standard 4-20 mA signals by adopting an HDO7mV signal isolation transmitter, and then the standard 4-20 mA signals are connected into a Zigbee wireless terminal module, and the standard 4-20 mA signals are transmitted into a server through a wireless network for unified processing. An operation method of a hoisting anti-collision device for a large-scale hydraulic generator rotor comprises the following steps:

firstly, before the rotor 6 is hoisted, the anti-collision device is placed on the top end surface of the rotor, and the installation posture of the anti-collision device is adjusted by rotating the adjusting handle 303 and the screw 308 with a handle, so that the bottom plate of the base 301 is parallel to the top end surface of the rotor 6, and the anti-collision strip assembly 312 is vertical to the end surface of the rotor 6 when being inserted downwards;

step two, the installation number of the anti-collision bars 3121 is selected according to the height of the rotor 6, and a plurality of anti-collision bars 3121 are assembled into an anti-collision bar assembly 312;

step three, installing the anti-collision bar assembly 312, wherein one surface of the anti-collision bar assembly 312, which is provided with the adsorption magnet 3123, faces the outer cylindrical surface of the rotor 6 when the anti-collision bar assembly 312 is inserted downwards, and adjusting the installation position of the anti-collision device to enable the adsorption magnet 3123 of the anti-collision bar assembly 312 to be adsorbed on the outer cylindrical surface of the rotor 6;

step four, locking the guide rod 305 through the linear bearing 304 with the locking box type sliding block and opening the switch of the switch type magnetic seat 307, so that the anti-collision device is adsorbed and fixed;

step five, installing a plurality of anti-collision devices on the top end surface of the rotor 6 according to the operation method of the step 1-4, and uniformly distributing the plurality of anti-collision devices on the top end surface of the rotor 6;

step six, when the rotor 6 is hoisted and assembled, the wireless terminal module 311 in each anti-collision device is only used for receiving signals transmitted by the pressure sensor arranged on the anti-collision strip assembly 312 of the anti-collision device; by the signal information received by the wireless terminal module 311 on the anti-collision device installed at different positions of the rotor 6, the position where the gap between the rotor 6 and the stator 4 is too small can be known,

and seventhly, when the gap between the rotor 6 and the stator 4 is too small, the pressure sensor is extruded, and when the gap exceeds a set threshold value, the wireless terminal module 311 is used for receiving a pressure signal of the sensor and transmitting the pressure signal to the router in a wireless mode, the router is electrically connected with the server, and the server visually displays the pressure value through a display screen and is used for lifting operators as a reference for adjusting the position and the gesture of the rotor in the lifting process. When the pressure threshold value is exceeded, a display screen connected with the server sends out an alarm signal; the rotor hoisting device is used for realizing a real-time early warning function, and when the pressure value detected by the pressure sensor exceeds the limit, the rotor hoisting is proved to be unstable; at the same time, the anti-collision strip assembly 312 is used for physically protecting the rotor 6, so as to avoid the direct collision between the rotor 6 and the stator 4.

The above embodiments are only preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention should be defined by the claims, including the equivalents of the technical features in the claims. I.e., equivalent replacement modifications within the scope of this invention are also within the scope of the invention.

Claims

1. A large-scale hydraulic generator rotor hoist and mount buffer stop, its characterized in that: the anti-collision device comprises a base (301), wherein a plurality of guide wheels (309) are arranged on a vertical plate at the end part of the base (301), anti-collision strip assemblies (312) are inserted between the guide wheels (309), the anti-collision strip assemblies (312) are in sliding fit with the guide wheels (309), and the anti-collision strip assemblies (312) are locked with the base (301) through locking pieces; the anti-collision strip assembly (312) is provided with a pressure sensor (3124); the other end part of the base (301) is provided with a rotor connecting mechanism which is used for being detachably arranged on the top end surface of the rotor (6).

2. The large-scale hydro-generator rotor hoist and mount buffer stop of claim 1, wherein: the rotor connecting mechanism comprises a universal adjusting foot (302) connected with a base plate of the base (301), an adjusting handle (303) is arranged at the screw head part of the universal adjusting foot (302), and the adjusting handle (303) is used for adjusting the extending amount of the universal adjusting foot (302); the rotor connecting mechanism further comprises a switch type magnetic seat (307), a handle screw (308), a tailstock plate (306), a guide rod (305) and a locking box type sliding block linear bearing (304), wherein the locking box type sliding block linear bearing (304) is installed on the base (301), the locking box type sliding block linear bearing (304) is connected with the tailstock plate (306) through the guide rod (305), the handle screw (308) is arranged on the tailstock plate (306), and the handle screw (308) is connected with the switch type magnetic seat (307).

3. The large-scale hydro-generator rotor hoist and mount buffer stop of claim 1, wherein: the anti-collision strip assembly (312) is formed by splicing a plurality of anti-collision strips (3121), two adjacent anti-collision strips (3121) are detachably connected, guide grooves (31213) matched with guide wheels (309) are formed in two sides of each anti-collision strip (3121), an adsorption magnet (3123) and a pressure sensor (3124) are arranged on the back of each anti-collision strip (3121), and the adsorption magnet (3123) is used for being adsorbed on the outer column surface of the rotor (6); the contact of the pressure sensor (3124) protrudes from the surface of the bumper strip (3121) but is not higher than the suction surface of the suction magnet (3123).

4. The large-scale hydro-generator rotor hoist and mount buffer stop of claim 1, wherein: the pressure sensor (3124) is electrically connected with the wireless terminal module (311), and the wireless terminal module (311) is installed on the base (301); the wireless terminal module (311) is used for receiving the pressure signal of the sensor and transmitting the pressure signal to the router in a wireless mode, the router is electrically connected with the server, and the server is used for visually displaying the pressure value through the display screen and is used for lifting operators as a reference for adjusting the position and the gesture of the rotor in the lifting process.

5. The large-scale hydro-generator rotor hoist and mount buffer stop of claim 1, wherein: the upper end and the lower end of each anti-collision strip (3121) are respectively provided with a mortise (31212) and a tenon (31211), the two adjacent anti-collision strips (3121) are connected through the mortise (31212) and the tenon (31211) mortise and tenon, and the joint of the mortise (31212) and the tenon (31211) is locked through a jackscrew (3122).

6. The method of operating a large hydro-generator rotor hoist anti-collision device of claim 1, comprising the steps of:

before the rotor (6) is hoisted, the anti-collision device is placed on the top end face of the rotor, and the installation posture of the anti-collision device is adjusted through rotating an adjusting handle (303) and a screw rod (308) with a handle, so that the bottom plate of a base (301) is parallel to the top end face of the rotor (6), and the anti-collision strip assembly (312) is vertical to the end face of the rotor (6) during downward insertion;

step two, the installation number of the anti-collision bars (3121) is selected according to the height of the rotor (6), and a plurality of anti-collision bars (3121) are assembled into an anti-collision bar assembly (312);

step three, installing a bumper strip assembly (312), wherein when the bumper strip assembly (312) is inserted downwards, one surface of the bumper strip assembly (312) provided with the adsorption magnet (3123) faces to the outer cylindrical surface of the rotor (6), and adjusting the installation position of the bumper strip assembly to enable the adsorption magnet (3123) of the bumper strip assembly (312) to be adsorbed on the outer cylindrical surface of the rotor (6);

step four, locking the guide rod (305) through a linear bearing (304) with a locking box type sliding block and opening a switch of a switch type magnetic seat (307) so as to enable the anti-collision device to be adsorbed and fixed;

step five, according to the operation method of the step 1-4, a plurality of anti-collision devices are arranged on the top end face of the rotor (6), and the anti-collision devices are uniformly distributed on the top end face of the rotor (6);

step six, when the rotor (6) is hoisted and assembled, the wireless terminal module (311) in each anti-collision device is only used for receiving signals transmitted by the pressure sensor arranged on the anti-collision strip assembly (312) of the anti-collision device; the position of too small a gap between the rotor (6) and the stator (4) can be known through the signal information received by the wireless terminal module (311) arranged on the anti-collision device at different positions of the rotor (6),

step seven, when the gap between the rotor (6) and the stator (4) is too small, the pressure sensor is extruded, when the gap exceeds a set threshold value, a display screen connected with the server sends out an alarm signal for realizing a real-time early warning function, and when the pressure value detected by the pressure sensor is over-limited, the rotor lifting is proved to be unstable; and meanwhile, the anti-collision strip assembly (312) is used for physically protecting the rotor (6) and avoiding direct collision between the rotor (6) and the stator (4).