CN113911875A - Overwinding protection device and method for deep well large-tonnage lifting system - Google Patents
Overwinding protection device and method for deep well large-tonnage lifting system Download PDFInfo
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- CN113911875A CN113911875A CN202110996220.4A CN202110996220A CN113911875A CN 113911875 A CN113911875 A CN 113911875A CN 202110996220 A CN202110996220 A CN 202110996220A CN 113911875 A CN113911875 A CN 113911875A
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- permanent magnet
- sliding column
- plastic
- steel belt
- buffer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/08—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for preventing overwinding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B19/00—Mining-hoist operation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/12—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions in case of rope or cable slack
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
- B66B5/26—Positively-acting devices, e.g. latches, knives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/28—Buffer-stops for cars, cages, or skips
- B66B5/282—Structure thereof
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
The invention discloses an overwinding protection device and method for a deep well large-tonnage lifting system. The permanent magnet retarding device comprises a pair of permanent magnet device supporting mechanisms, a permanent magnet sliding column mechanism and a permanent magnet mechanism which are symmetrically arranged, and also comprises a permanent magnet sliding column connecting mechanism; the plastic-to-metal steel strip buffering device comprises a pair of plastic-to-metal steel strip supporting mechanisms, a buffering sliding column mechanism, a compression roller buffering mechanism and a buffering sliding column connecting mechanism, wherein the pair of plastic-to-metal steel strip supporting mechanisms, the buffering sliding column mechanism and the compression roller buffering mechanism are symmetrically arranged. The device and the method can realize the functions of collision prevention, buffering, tank supporting, quick resetting and the like of the lifting device, and then reduce or even eliminate potential safety hazards caused by overwinding and overdischarging accidents in the mine transportation process.
Description
Technical Field
The invention relates to the field of safety protection of mine hoisting systems, in particular to an overwinding protection device and method for a deep well large-tonnage hoisting system.
Background
In recent years, with the shortage of the surface coal seam and the continuous increase of the energy demand, the mining depth of the mine is continuously deepened, the operation speed of a lifting container is continuously accelerated, the lifting capacity of the mine is continuously increased, and the mine production is gradually developed towards maximization, centralization and high efficiency. Therefore, the continuous development of mining systems puts higher requirements on the safety and reliability of the operation of the mine hoist.
The vertical shaft hoisting is used as a main form of mine production and transportation and is the throat of the mine production, the vertical shaft hoisting equipment is used for hoisting materials, equipment and personnel along a shaft, the safety protection of a hoisting system is an important link of the mine production, but the problem of overwinding of a hoisting container in the mine hoisting system always troubles the safety production of the mine. Although the existing mine hoisting system has various electrical equipment protection and backup protection, due to the fact that the speed of hoisting a container is high and the braking deceleration is limited to a certain extent during overwinding, overwinding accidents still occur occasionally, light persons influence mine production, and heavy persons cause equipment damage and personnel injury.
The conventional overwinding protection devices at present have the following types: the conventional overwinding protection devices all adopt a contact type braking mode, so that the defects of large friction force, large damage influence on equipment, short service life of the equipment and the like exist. Especially in a deep well large-tonnage lifting system, because the environment of a kilometer deep well is more complicated, the mass, the kinetic energy and the inertia of the lifting container are larger, and the use requirements on the reliability and the stability of the system are difficult to meet only by the conventional mode.
Compared with the conventional overwinding protection device, the magnetic slow braking device has the defects of smaller braking force, lower reliability and unsuitability for high-speed braking, and particularly cannot meet the overwinding safety protection requirement of a deep well large-tonnage lifting system.
The permanent magnet retarding has excellent braking effect on objects moving at high speed, and can be applied to a non-contact braking mode of a large-inertia transportation system. However, according to the permanent magnet retarding principle, the permanent magnet retarding only can retard the moving part, but the final braking cannot be realized, so the permanent magnet retarding device is mostly used in combination with the traditional braking mode, and the moving part is finally braked by the traditional braking mode after being decelerated by the permanent magnet.
Therefore, the invention provides a novel overwinding protection device scheme combining a permanent magnet retarding device and a plastic-deformation steel belt buffering device, and particularly provides an overwinding protection device and method for a deep well large-tonnage lifting system.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides an overwinding protection device and an overwinding protection method for a deep well large-tonnage lifting system.
In order to solve the technical problems, the invention adopts the technical scheme that:
an overwinding protection device for a deep well large-tonnage lifting system comprises a permanent magnet retarding device and a plastic-deformation steel belt buffering device which are distributed on a mine derrick.
The permanent magnet retarding device comprises a pair of permanent magnet device supporting mechanisms, a permanent magnet sliding column mechanism and a permanent magnet mechanism which are symmetrically arranged, and further comprises a permanent magnet sliding column connecting mechanism.
The permanent magnet device supporting mechanism comprises a permanent magnet device bracket, a permanent magnet slideway and a permanent magnet bracket base; the permanent magnet device support is arranged in the vertical direction and is fixed on the mine derrick; the horizontal cross section of the permanent magnet device bracket is of a groove shape; the permanent magnet slideways are vertically distributed and are respectively fixed on the inner sides of two parallel surfaces of the permanent magnet device bracket; the permanent magnet support base is horizontally arranged at the bottom end of the permanent magnet device support.
The permanent magnet sliding column mechanism comprises a permanent magnet sliding column shell and a metal conductor plate; the horizontal cross section of the permanent magnet sliding column shell is of a groove shape, and the groove opening of the permanent magnet sliding column shell is opposite to the groove opening direction of the permanent magnet device support; the opening of the groove of the permanent magnet sliding column shell is connected with the permanent magnet slideway, and the permanent magnet sliding column shell can freely slide along the permanent magnet slideway; the metal conductor plate is fixed in the permanent magnet sliding column shell.
The permanent magnet mechanism is arranged in the groove of the permanent magnet device bracket and is positioned between the side surface opposite to the opening of the groove of the permanent magnet device bracket and the permanent magnet slideway; the permanent magnet mechanism comprises a permanent magnet bracket, a permanent magnet cover plate and a permanent magnet; the permanent magnet support is fixed on the permanent magnet device support, the permanent magnets are arranged in the permanent magnet support, and the permanent magnet cover plate covers the permanent magnets and is fixedly connected with the permanent magnet support.
The permanent magnet sliding column mechanisms are connected through permanent magnet sliding column connecting mechanisms; the permanent magnet sliding column connecting mechanism comprises a permanent magnet sliding column connecting beam; the permanent magnet sliding column connecting cross beam is horizontally arranged, and two ends of the permanent magnet sliding column connecting cross beam are respectively connected to the permanent magnet sliding column shells which are symmetrically arranged.
The plastic-to-metal steel strip buffering device comprises a pair of plastic-to-metal steel strip supporting mechanisms, a buffering sliding column mechanism, a compression roller buffering mechanism and a buffering sliding column connecting mechanism, wherein the pair of plastic-to-metal steel strip supporting mechanisms, the buffering sliding column mechanism and the compression roller buffering mechanism are symmetrically arranged.
The plastic-to-steel strip supporting mechanism comprises a plastic-to-steel strip supporting frame, a buffering slideway, a plastic-to-steel strip supporting base and a plastic-to-steel strip upper end cover.
The plastic-deformation steel belt supporting frame is arranged in the vertical direction and is fixed on the mine derrick; the horizontal cross section of the permanent magnet device bracket is of a groove shape; the buffering slide ways are vertically distributed and are respectively fixed on the inner sides of two parallel surfaces of the plastic-deformation steel strip supporting frame; the plastic-changing steel strip supporting base is horizontally arranged at the bottom end of the plastic-changing steel strip supporting frame; the upper end cover of the plastic-deformation steel belt is horizontally arranged at the top end of the plastic-deformation steel belt supporting frame.
The buffer sliding column mechanism comprises a buffer sliding column shell and an energy-absorbing steel belt; the horizontal cross section of the buffering sliding column shell is in a groove shape, and the groove opening of the buffering sliding column shell is opposite to the groove opening direction of the plastic-deformation steel belt supporting frame; the opening of the groove of the buffering slide column shell is connected with the buffering slide way, and the buffering slide column shell can freely slide along the buffering slide way; the bottom end of the energy-absorbing steel belt is connected with the plastic-changing steel belt supporting base, and the top end of the energy-absorbing steel belt is connected with the upper end cover of the plastic-changing steel belt.
The compression roller buffer mechanism comprises a compression roller buffer mechanism shell, a non-return device, a static pressure roller mechanism and a dynamic pressure roller mechanism.
The compression roller buffer mechanism shell is vertically arranged on the plastic-deformation steel belt supporting base; a rectangular through hole which is communicated in the horizontal direction is formed in the shell of the compression roller buffer mechanism; the non-return device is arranged in the rectangular through hole and can slide in the rectangular through hole.
The static pressure roller mechanism and the dynamic pressure roller mechanism are respectively arranged on two sides of the energy-absorbing steel belt.
The static pressure roller mechanism comprises a static pressure roller and a baffle shaft plate; the shaft blocking plates are respectively fixed on the outer sides of two parallel surfaces of the buffer sliding column shell, and cylindrical roller bearing seats are arranged on the shaft blocking plates; one end of the static pressure roller is connected with the cylindrical roller bearing seat of the shaft baffle on one side, and the other end of the static pressure roller penetrates through the two parallel surfaces of the buffering sliding column shell in sequence and is connected with the cylindrical roller bearing seat arranged on the shaft baffle on the other side.
The dynamic pressure roller mechanism comprises a bearing seat bottom plate, a cylindrical roller bearing seat, a dynamic pressure roller, a linear bearing, a roller supporting frame and a roller.
The bearing seat bottom plate is vertically fixed on the shell of the compression roller buffer mechanism, one side surface of the bearing seat bottom plate is fixedly provided with a dynamic pressure roller cylindrical roller bearing seat, and the dynamic pressure roller is arranged in the dynamic pressure roller cylindrical roller bearing seat in parallel with the bearing seat bottom plate; and a linear bearing is vertically fixed on the other side surface of the bearing seat bottom plate, and the roller is connected with the linear bearing through a roller supporting frame.
The buffer sliding column mechanisms are connected through buffer sliding column connecting mechanisms; the buffer sliding column connecting mechanism comprises a buffer sliding column connecting beam; the buffering sliding column connecting beam is horizontally arranged, and two ends of the buffering sliding column connecting beam are respectively connected to the buffering sliding column shells which are symmetrically arranged.
Preferably, a limiting pin shaft and a reinforcing rib are arranged between the permanent magnet sliding column connecting beam and the buffering sliding column shell, and a plastic plate is further arranged on the bottom surface of the permanent magnet sliding column connecting beam.
As a further preferred aspect of the present invention, a limit pin and a reinforcing rib are provided between the buffer strut connecting beam and the buffer strut housing; the bottom surface of the buffer sliding column connecting beam is also provided with a plastic plate.
As a further preferred aspect of the present invention, the permanent magnet support is composed of a plurality of rectangular supports, and a rectangular permanent magnet is disposed in each group of rectangular supports; and a yoke iron plate connected with the rectangular permanent magnet is fixed at the bottom of the permanent magnet bracket.
Preferably, the permanent magnet cover plate is provided with a rectangular through hole, and a permanent magnet retarding air gap compensator is distributed in the rectangular through hole; the permanent magnet retarding air gap compensator is H-shaped, the bottom of the permanent magnet retarding air gap compensator is fixed on the permanent magnet cover plate, and the top of the permanent magnet retarding air gap compensator penetrates through the rectangular through hole and extends outwards.
As a further preferable aspect of the present invention, the check means includes a check pawl; the non-return supporting claw is in a right-angled trapezoid shape, and one side of a right-angled edge extends into a rectangular through hole in the shell of the compression roller buffer mechanism; the non-return supporting claw is provided with a non-return pin shaft for limiting the movement of the non-return supporting claw.
As a further preferable mode of the present invention, the plastically deformed steel strip supporting mechanism further includes a disc spring and a screw fork; the bottom end of the screw rod fork is connected with an energy-absorbing steel belt, and the top end of the screw rod fork is connected with a disc spring; the disc spring is fixed at the bottom of the upper end cover of the plastic deformation steel belt; and a buffering wood block is also arranged in the upper end cover of the plastic deformation steel belt.
Preferably, the permanent magnet retarding devices and the plastic-deformation steel belt buffering devices can be combined and matched for use, one group of permanent magnet retarding devices can be matched with a plurality of groups of plastic-deformation steel belt buffering devices for use, and a plurality of groups of permanent magnet retarding devices can be matched with a group of plastic-deformation steel belt buffering devices for use.
A protection method of an overwinding protection device for a deep well large-tonnage lifting system specifically comprises the following steps:
s1, installing and fixing the overwinding protection device of the lifting system on a derrick in a shaft, and adjusting the rectangular permanent magnets in the permanent magnet mechanism to enable the magnetic paths of the adjacent magnetic permanent magnets to be arranged in opposite directions;
s2, when an overwinding accident occurs to the lifting system, the lifting container rises to abut against the permanent magnet support base and the permanent magnet sliding column connecting cross beam to drive the permanent magnet sliding column mechanism to vertically rise and move along the permanent magnet sliding way, at the moment, the metal conductor plate in the permanent magnet sliding column mechanism and the permanent magnet in the permanent magnet mechanism relatively displace, the metal conductor plate cuts the magnetic induction lines of the permanent magnet, a large amount of induced current is generated in the metal conductor plate, a current field generated by the induced current reacts on the main magnetic field to form resistance which hinders the permanent magnet sliding column mechanism from rising, and therefore the lifting container is decelerated;
s3, the container is lifted continuously after the speed of the container is reduced, the inclined plane at the outer side of the backstop claw contacts the support frame of the plastic-deformed steel strip and then is forced to be retracted into the backstop device, and the lifting container which is propped under the buffer sliding column connecting beam is locked, so that the buffer sliding column mechanism, the buffer sliding column connecting beam and the lifting container are locked together, and the lifting container is prevented from falling off;
s4, the lifting container continues to rise after being locked, the dynamic pressure roller mechanism is pressed by the buffering slide way and moves to one side of the static pressure roller in the horizontal direction, and the energy-absorbing steel belt is plastically deformed under the repeated pressing of the static pressure roller mechanism and the dynamic pressure roller mechanism and provides braking force to decelerate the lifting container; the buffer braking force is increased along with the rising of the lifting container, and after the braking force reaches the maximum value, the lifting container is limited by the constant deformation force of the energy-absorbing steel belt no matter the lifting container moves upwards or downwards; under the combined action of the non-return supporting claw, the energy-absorbing steel belt, the static pressure roller mechanism and the dynamic pressure roller mechanism, the overwound lifting container can be reliably buffered and braked within an allowable overwind distance;
s5, when the energy-absorbing steel belt and the lifting steel wire rope are not broken, the lifting container rises to the top end, and the buffer sliding column connecting beam is sleeved by a buffer wood block positioned on the upper end cover of the plastic-deformation steel belt; the buffer wood block can slow down the impact of the lifting container, the buffer sliding column connecting beam can play a role of an anti-collision beam to protect the lifting container from being damaged completely, the non-return supporting claw and the energy-absorbing steel belt can lock the lifting container to prevent falling back, and finally the lifting container is safely stopped within the overwinding distance;
s6, when the hoisting steel wire rope is broken, the hoisting container falls freely, at the moment, under the simultaneous action of the permanent magnet retarding device, the non-return supporting claw and the energy-absorbing steel belt, the permanent magnet retarding device realizes the retarding of the magnetic field of the permanent magnet, the falling speed of the hoisting container is reduced, the non-return supporting claw executes the anti-falling tank supporting action, the energy-absorbing steel belt provides a non-return braking force, the hoisting container is prevented from falling freely, and therefore the hoisting container is enabled to be stably stopped within the overwinding distance;
s7, when the energy-absorbing steel belt is broken, the lifting container falls freely, the falling speed of the lifting container is reduced under the combined action of the permanent magnet retarding device and the non-return supporting claw, and the lifting container is finally dragged by the base of the plastic-deformation steel belt buffering device, so that the safety brake of the lifting container is realized.
The invention has the following beneficial effects:
1. the overwinding protection device is fixedly arranged on the derrick, can realize the safety protection of various hoisting systems such as a winding type hoisting system, a friction type hoisting system and the like, and has strong adaptability and more convenient installation, use and maintenance.
2. The plastic-deformation steel belt buffer device is obviously superior to other traditional overwinding protection devices in performance, is combined with a permanent magnet eddy current retarding device, and can be applied to the safety braking of large-tonnage and large-inertia lifting containers of kilometers of deep wells, even ultra-kilometers of deep wells.
3. The hollow sleeve frame of the whole external structure of the overwinding protection device of the hoisting system is welded on the derrick, when an overwinding accident occurs, the device disperses the buffering braking force and the stress of the anti-collision beam to the multilayer derrick beam through the hollow sleeve frame, thereby greatly improving the stress condition of the derrick, and simultaneously, the hollow sleeve frame also plays a role in strengthening the strength and the rigidity of the derrick.
4. The invention relates to an overwinding protection device of a deep well large-tonnage lifting system based on the combination of a permanent magnet retarding device and a plastic-deformation steel belt buffer device. When the overwinding accident happens, the permanent magnet eddy current retarding device firstly carries out non-contact retarding braking on the lifting container, the retarding braking effect is better, and then the lifting container is subjected to buffering braking under the combined action of the permanent magnet eddy current retarding device and the lifting container, so that the impact load and the damage of the plastic-deformation steel belt buffering device can be reduced when the accident happens, the service life of equipment is greatly prolonged, the use times of the plastic-deformation steel belt buffering device are increased, meanwhile, the device can also effectively control the overspeed operation of the lifting system, and the safety factor of the deep well lifting system is improved.
5. The invention integrates the functions of overwinding buffering, tank supporting collision prevention, quick reset, water prevention, dust prevention and the like, particularly the function of the tank supporting, and well meets the requirements of coal mine safety regulations.
6. The traditional overwinding protection device is difficult to realize the safe braking of a large-tonnage and high-speed lifting container, and the overwinding protection device can realize the safe buffer braking under the conditions of high lifting speed and large lifting container total mass, so that the overwinding protection device is a safe and feasible guarantee measure for the current deep well large-inertia lifting system.
Drawings
Fig. 1 is a schematic view of the overall structure of the overwind protection device of the lifting system of the present invention.
FIG. 2 is a schematic view of a permanent magnet retarding device according to the present invention.
FIG. 3 is a partial cross-sectional view of a permanent magnet retarding device in accordance with the present invention.
Fig. 4 is a schematic structural diagram of a permanent magnet mechanism of the present invention.
FIG. 5 is a schematic view of a magnetic circuit of a permanent magnet of the permanent magnet retarding device of the present invention.
Fig. 6 is a structural diagram of three permanent magnet retarding air gap compensators of the permanent magnet mechanism of the invention.
FIG. 7 is a schematic view of the basic operation of the permanent magnet retarding device of the present invention.
FIG. 8 is a schematic structural diagram of a plastic deformation steel belt buffer device according to the present invention.
FIG. 9 is a cross-sectional view of a belleville spring mounting arrangement of the present invention.
FIG. 10 is a schematic view of the structure of the buffering slide column mechanism of the present invention
FIG. 11 is a schematic view of the buffering mechanism of the press roll of the present invention.
Fig. 12 is a schematic view of a baffle shaft plate structure of the hydrostatic roller mechanism of the invention.
FIG. 13 is a schematic view of the structure of the movable roller mechanism of the present invention.
Fig. 14 is a schematic view of the lifting container of the present invention.
Fig. 15 is a flowchart of the overwind protection operation of the overwind protection device of the lifting system according to the present invention.
Among them are:
10. a permanent magnet retarding device; 11. a permanent magnet device support mechanism; 111. a permanent magnet device support; 112. a permanent magnet slide; 113. a permanent magnet support base; 12. a permanent magnet traveller mechanism; 121. a permanent magnet strut housing; 122. a metal conductor plate; 13. a permanent magnet mechanism; 131. a permanent magnet support; 132. a permanent magnet cover plate; 133. a permanent magnet; 134. a yoke iron plate; 135. a permanent magnet retarding air gap compensator; 14. a permanent magnet strut connecting mechanism; 141. the permanent magnet sliding column is connected with the cross beam; 142. a limiting pin shaft; 143. reinforcing ribs; 144. a plastic panel;
20. a plastic-deformation steel belt buffer device; 21. a plastic-deformation steel belt supporting mechanism; 211. a plastic-deformation steel belt support frame; 212. a buffer slide way; 213. a plastic-deformation steel belt supporting base; 214. an upper end cover of the plastic deformation steel belt; 215. a disc spring; 216. a screw fork; 217. a buffer wood block; 22. a buffer strut mechanism; 221. a damping strut housing; 222. an energy-absorbing steel strip; 23. a compression roller buffer mechanism; 231. a compression roller buffer mechanism shell; 232. a non-return device; 2321. a backstop supporting claw; 2322. a non-return pin shaft; 233. a static pressure roller mechanism; 2331. a static pressure roller; 2332. a baffle plate; 234. a dynamic pressure roller mechanism; 2341. a bearing block base plate; 2342. a movable pressure roller; 2343. a linear bearing; 2344. a roller support frame; 2345. a roller; 24. a buffer strut connecting mechanism; 241. the buffer sliding column is connected with the cross beam;
30. the container is lifted.
Detailed Description
In the description of the present invention, it is to be understood that the terms "left side", "right side", "upper part", "lower part", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and that "first", "second", etc., do not represent an important degree of the component parts, and thus are not to be construed as limiting the present invention. The specific dimensions used in the present example are only for illustrating the technical solution and do not limit the scope of protection of the present invention.
The present invention will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.
An overwinding protection device for a deep well large-tonnage lifting system is shown in figure 1 and comprises a permanent magnet retarding device 10 and a plastic deformation steel belt buffering device 20 which are arranged on a mine derrick.
As shown in fig. 2 and fig. 3, the permanent magnet retarder 10 includes a pair of permanent magnet device supporting mechanisms 11, a permanent magnet strut mechanism 12, and a permanent magnet mechanism 13, which are symmetrically arranged, and further includes a permanent magnet strut connecting mechanism 14.
The permanent magnet device supporting mechanism 11 comprises a permanent magnet device bracket 111, a permanent magnet slideway 112 and a permanent magnet bracket base 113; the permanent magnet device support 111 is arranged in the vertical direction and fixed on a mine derrick; the horizontal cross section of the permanent magnet device bracket 111 is of a groove shape; the permanent magnet slide ways 112 are vertically arranged and respectively fixed on the inner sides of two parallel surfaces of the permanent magnet device bracket 111; the permanent magnet support base 113 is horizontally arranged at the bottom end of the permanent magnet device support 111.
The permanent magnet strut mechanism 12 comprises a permanent magnet strut housing 121 and a metal conductor plate 122; the horizontal cross section of the permanent magnet sliding column shell 121 is in a groove shape, and the groove opening of the permanent magnet sliding column shell 121 is opposite to the groove opening direction of the permanent magnet device bracket 111; the groove opening of the permanent magnet sliding column shell 121 is connected with the permanent magnet sliding way 112, and the permanent magnet sliding column shell 121 can freely slide along the permanent magnet sliding way 112; the metal conductor plate 122 is fixed in the permanent magnet strut housing 121.
The permanent magnet mechanism 13 is arranged in the groove of the permanent magnet device bracket 111 and is positioned between the side surface opposite to the opening of the groove of the permanent magnet device bracket 111 and the permanent magnet slideway 112; the permanent magnet mechanism 13 comprises a permanent magnet bracket 131, a permanent magnet cover plate 132 and a permanent magnet 133; the permanent magnet bracket 131 is fixed on the permanent magnet device bracket 111, the permanent magnet 133 is arranged in the permanent magnet bracket 131, and the permanent magnet cover plate 132 covers the permanent magnet and is fixedly connected with the permanent magnet bracket 131.
As shown in fig. 4, the permanent magnet support 131 is composed of a plurality of rectangular supports, and a rectangular permanent magnet is distributed in each group of rectangular supports; and a yoke plate 134 connected with the rectangular permanent magnet is fixed at the bottom of the permanent magnet bracket 131.
As shown in fig. 5, when rectangular permanent magnets are arranged, attention should be paid to the opposite directions of the magnetic circuits of adjacent permanent magnets, which is beneficial to the magnetic circuits of adjacent permanent magnets to form a closed loop, and the braking effect of the permanent magnets can be enhanced.
A rectangular through hole is formed in the permanent magnet cover plate 132, and a permanent magnet retarding air gap compensator 135 is distributed in the rectangular through hole; the bottom of the permanent magnet retarding air gap compensator 135 is fixed on the permanent magnet cover plate 132, and the top thereof passes through the rectangular through hole and extends outwards.
As shown in FIG. 6, the permanent magnet retarding air gap compensator can be selected from the group consisting of "L", "V" and "H". In order to solve the influence of the gap between the permanent magnet and the metal conductor plate on the braking force, iron foils with high magnetic permeability are arranged above the permanent magnet, and the iron foils are respectively in an L shape, a V shape and an H shape. The "H" type air gap compensation structure has the best braking effect, which is about three times of the permanent magnet retarding braking force of the non-air gap compensation structure, so the permanent magnet retarding air gap compensator 135 is mostly in the "H" type structure, and other forms can be alternatively applied thereto.
The permanent magnet sliding column mechanisms 12 are connected through permanent magnet sliding column connecting mechanisms 14; the permanent magnet strut connecting mechanism 14 comprises a permanent magnet strut connecting beam 141; the permanent magnet sliding column connecting beam 141 is horizontally arranged, and two ends of the permanent magnet sliding column connecting beam are respectively connected to the permanent magnet sliding column shells 121 which are symmetrically arranged. A limiting pin 142 and a reinforcing rib 143 are arranged between the permanent magnet sliding column connecting beam 141 and the buffer sliding column shell 221, and a plastic plate 144 is further arranged on the bottom surface of the permanent magnet sliding column connecting beam 141.
Straight notch-shaped grooves are formed in the upper portion and the lower portion of the permanent magnet sliding column connecting beam 141, so that the weight of the beam is reduced on the premise that the use strength is met, and the damage caused when the lifting container 30 collides with the permanent magnet sliding column connecting beam 141 is reduced.
As shown in fig. 7, when an overwinding accident occurs in the lifting system, the lifting container 30 rises to abut against the permanent magnet support base 113 and the permanent magnet strut connecting beam 14, so as to drive the permanent magnet strut mechanism 12 to vertically rise and move along the permanent magnet slideway 112, at this time, the metal conductor plate 122 in the permanent magnet strut mechanism 12 and the permanent magnet 133 in the permanent magnet mechanism 13 relatively displace, the metal conductor plate 122 cuts the magnetic induction lines of the permanent magnet 133, a large amount of induced current is generated in the metal conductor plate 122, and a current field generated by the induced current reacts on the main magnetic field to form resistance which hinders the permanent magnet strut mechanism from rising 12, so that the lifting container 30 is decelerated. From the energy point of view, the essence of the permanent magnet braking is that the Faraday electromagnetic induction principle is utilized to convert the kinetic energy of the moving object into electric energy, and the electric energy is finally converted into heat energy to be dissipated, so that the kinetic energy of the moving object is reduced, and the aim of slowing speed is fulfilled.
As shown in fig. 8, the plastic-deformation steel belt buffering device 20 includes a pair of plastic-deformation steel belt supporting mechanisms 21, a buffering sliding column mechanism 22, a compression roller buffering mechanism 23, and a buffering sliding column connecting mechanism 24.
The plastic-deformation steel belt supporting mechanism 21 comprises a plastic-deformation steel belt supporting frame 211, a buffering slideway 212, a plastic-deformation steel belt supporting base 213 and a plastic-deformation steel belt upper end cover 214.
The plastic-deformation steel belt supporting frame 211 is arranged in the vertical direction and is fixed on a mine derrick; the horizontal cross section of the permanent magnet device bracket 111 is of a groove shape; the buffering slide ways 212 are vertically arranged and respectively fixed on the inner sides of two parallel surfaces of the plastic-deformation steel strip supporting frame 211; the plastic-changing steel strip supporting base 213 is horizontally arranged at the bottom end of the plastic-changing steel strip supporting frame 211; the plastic-deformation steel belt upper end cover 214 is horizontally arranged at the top end of the plastic-deformation steel belt support frame 211.
The plastic-deformation steel belt supporting mechanism 21 further comprises a disc spring 215 and a screw rod fork 216; the bottom end of the screw rod fork 216 is connected with an energy-absorbing steel belt 222, and the top end of the screw rod fork is connected with a belleville spring 215; the belleville spring 215 is fixed at the bottom of the plastic deformation steel belt upper end cover 214; and a buffer wood block 217 is also arranged in the upper end cover 214 of the plastic-deformation steel belt.
As shown in fig. 9, the end with the large diameter of the disc spring 215 faces downward, the disc spring 215 at the topmost end points arbitrarily, the adjacent springs are in contact with each other with the same diameter, the disc spring 215 is used for compensating the initial deformation of the energy-absorbing steel belt 222, the energy-absorbing steel belt 222 is prevented from being suddenly impacted by a container and being broken, and meanwhile, the energy-absorbing steel belt 222 can be deformed according to the shape of S in the initial braking stage.
As shown in fig. 10, the strut damping mechanism 22 includes a strut damping housing 221 and an energy absorbing steel strip 222; the horizontal cross section of the buffering slide column shell 221 is of a groove shape, and the groove opening of the buffering slide column shell 221 is opposite to the groove opening direction of the plastic-deformation steel belt support frame 211; the groove opening of the buffering slide column shell 221 is connected with the buffering slide way 212, and the buffering slide column shell 221 can freely slide along the buffering slide way 212; the energy absorbing steel belt 222 is connected with the plastic-deformed steel belt supporting base 213 at the bottom end and connected with the plastic-deformed steel belt upper end cover 214 at the top end.
As shown in fig. 11, the platen buffer mechanism 23 includes a platen buffer mechanism housing 231, a check device 232, a static pressure roller mechanism 233, and a dynamic pressure roller mechanism 234.
The compression roller buffer mechanism shell 231 is vertically arranged on the plastic-deformation steel belt supporting base 213; a rectangular through hole which is penetrated in the horizontal direction is formed in the compression roller buffer mechanism shell 231; the check device 232 is arranged in the rectangular through hole and can slide in the rectangular through hole. The non-return device 232 comprises a non-return supporting claw 2321; the non-return supporting claw 2321 is in a right-angled trapezoid shape, and one side of a right-angled edge extends into a rectangular through hole in the shell of the compression roller buffer mechanism 23; the non-return supporting claw 2321 is provided with a non-return pin 2322 for limiting the movement of the non-return supporting claw 2321. The outer side inclined surface of the backstop 2321 contacts the plastic-deformed steel strip support frame 211 and then is forced to retract into the backstop device 232, so that the lifting container 30 which is propped against the lower part of the buffer sliding column connecting beam 241 is locked, the buffer sliding column mechanism 22, the buffer sliding column connecting beam 241 and the lifting container 30 are locked together, and the lifting container 30 is prevented from falling off.
The static pressure roller mechanism 233 and the dynamic pressure roller mechanism 234 are respectively arranged on both sides of the energy-absorbing steel strip 222. The number of the static pressure roller mechanisms 233 and the dynamic pressure roller mechanisms 234 in the press roller buffer mechanism 23 is not less than 3, on the premise of meeting the use requirements of the energy-absorbing steel belt 222, a plurality of static pressure roller mechanisms 233 and dynamic pressure roller mechanisms 234 can be selectively arranged and staggered up and down, and the energy-absorbing steel belt 222 penetrates through a gap between the static pressure roller mechanisms 233 and the dynamic pressure roller mechanisms 234, so that a larger braking force can be provided.
The static pressure roller mechanism 233 includes a static pressure roller 2331 and a baffle plate 2332; the shaft blocking plate 2332 is fixed at the outer side of two parallel surfaces of the buffer strut casing 221 respectively, as shown in fig. 12, a cylindrical roller bearing seat is arranged on the shaft blocking plate 2332; one end of the static pressure roller 2331 is connected with the cylindrical roller bearing seat of the shaft blocking plate 2332 at one side, and the other end of the static pressure roller passes through two parallel surfaces of the buffering slide column shell 221 in sequence and is connected with the cylindrical roller bearing seat arranged on the shaft blocking plate 2332 at the other side.
As shown in fig. 13, the movable pressure roller mechanism 234 includes a bearing housing base plate 2341, a movable pressure roller 2342, a linear bearing 2343, a roller support frame 2344, and a roller 2345.
The bearing seat bottom plate 2341 is vertically fixed on a shell of the compression roller buffer mechanism 23, a cylindrical roller bearing seat is fixed on one side surface of the bearing seat bottom plate 2341, and the dynamic pressure roller 2342 is arranged in the cylindrical roller bearing seat of the dynamic pressure roller in parallel with the bearing seat bottom plate 2341; the other side of the bearing seat bottom plate 2341 is vertically fixed with a linear bearing 2343, and the roller 2345 is connected with the linear bearing 2343 through a roller supporting frame 2344.
The buffer sliding column mechanisms 22 are connected through buffer sliding column connecting mechanisms 24; the buffer strut connecting mechanism 24 includes a buffer strut connecting beam 241; the buffer strut connecting beam 241 is horizontally arranged, and two ends of the buffer strut connecting beam are respectively connected to the buffer strut shells 221 which are symmetrically arranged. A limiting pin 142 and a reinforcing rib 143 are arranged between the buffer sliding column connecting beam 241 and the buffer sliding column shell 221; the bottom surface of the buffer strut connecting beam 241 is also provided with a plastic plate 144.
Straight notch-shaped grooves are formed in the upper portion and the lower portion of the buffering sliding column connecting beam 241, so that the weight of the beam is reduced on the premise that the use strength is met, and the damage caused when the lifting container 30 collides with the buffering sliding column connecting beam 241 is reduced.
As shown in fig. 14, the maximum self weight of the lifting container 30 which can be accommodated by the permanent magnet speed reducing device 10 and the plastic-deformation steel belt buffer device 20 is 50t, the maximum load is 45t, and the maximum external dimension of the container body is 7700 × 3800 × 11100 mm. Rectangular grooves for bearing are required to be processed on two sides of the lifting container 30, and when an overwinding accident happens, the non-return supporting claw 2321 can enter the rectangular groove to support the tank. The lifting container 30 may be made as a cage, skip or any other form, as long as the above requirements are met, and can be applied to the overwind protection of the lifting device of the present invention.
The permanent magnet retarding device 10 and the plastic-deformation steel belt buffering device 20 can be combined and matched for use, one group of permanent magnet retarding device 10 can be matched with a plurality of groups of plastic-deformation steel belt buffering devices 20 for use, and a plurality of groups of permanent magnet retarding devices 10 can be matched with one group of plastic-deformation steel belt buffering devices 20 for use.
The overwinding protection device of the lifting system is fixedly arranged on the derrick, can realize the safety protection of various lifting systems such as a winding type lifting system, a friction type lifting system and the like, and has stronger adaptability and more convenient installation, use and maintenance.
A protection method of an overwinding protection device for a deep well large-tonnage lifting system specifically comprises the following steps:
s1, installing and fixing the overwinding protection device of the lifting system on a derrick in a shaft, and adjusting the rectangular permanent magnets in the permanent magnet mechanism 1 to enable the magnetic paths of the adjacent magnetic permanent magnets to be arranged in opposite directions;
s2, when the overwinding accident happens to the lifting system, the lifting container 30 rises to abut against the permanent magnet support base 113 and the permanent magnet sliding column connecting cross beam 141, the permanent magnet sliding column mechanism 12 is driven to vertically rise and move along the permanent magnet sliding way 112, at the moment, the metal conductor plate 122 in the permanent magnet sliding column mechanism 12 and the permanent magnet in the permanent magnet mechanism 13 are relatively displaced, the metal conductor plate 122 cuts the magnetic induction lines of the permanent magnet, a large amount of induced current is generated in the metal conductor plate 12, a current field generated by the induced current reacts on the main magnetic field, resistance blocking the permanent magnet sliding column mechanism 12 from rising is formed, and therefore the lifting container 30 is decelerated;
s3, the lifting container 30 continues to rise after the speed is reduced, the inclined plane at the outer side of the non-return supporting claw 2321 contacts the plastic-deformed steel strip supporting frame 211 and then is stressed to retract into the non-return device 232, the lifting container 30 which is propped against the lower part of the buffer sliding column connecting beam 241 is locked, the buffer sliding column mechanism 22, the buffer sliding column connecting beam 241 and the lifting container 30 are locked together tightly, and the lifting container 30 is prevented from falling off;
s4, the lifting container 30 continues to rise after being locked, the dynamic pressure roller mechanism 234 is pressed by the buffer slideway 212 and moves to one side of the static pressure roller in the horizontal direction, and the energy-absorbing steel belt 222 is plastically deformed under the repeated pressing of the static pressure roller mechanism 233 and the dynamic pressure roller mechanism 234 and provides braking force to decelerate the lifting container 30; with the rising of the lifting container 30, the buffering braking force is increased, and after the braking force reaches the maximum value, the lifting container 30 is limited by the constant deformation force of the energy-absorbing steel belt 222 no matter the lifting container moves upwards or downwards; under the combined action of the non-return supporting claw 2321, the energy-absorbing steel belt 222, the static pressure roller mechanism 233 and the dynamic pressure roller mechanism 234, the overwound lifting container 30 can be reliably buffered and braked within an allowable overwind distance;
s5, when the energy-absorbing steel belt 222 and the hoisting steel wire rope are not broken, the hoisting container 30 rises to the top end, and the buffer sliding column connecting beam 241 is sleeved by the buffer wood block 217 of the plastic-deformation steel belt upper end cover 214; the buffer wood block 217 can slow down the impact of the lifting container 30, meanwhile, the buffer sliding column connecting beam 241 can play a role of an anti-collision beam to protect the lifting container 30 from being damaged completely, the non-return supporting claw 2321 and the energy-absorbing steel belt 222 can lock the lifting container 30 to prevent falling back, and finally the lifting container 30 can be safely stopped within an overwinding distance;
s6, when the hoisting steel wire rope is broken, the hoisting container (30) falls freely, at the moment, under the simultaneous action of the permanent magnet retarding device 10, the non-return supporting claw 2321 and the energy-absorbing steel belt 222, the permanent magnet retarding device 10 achieves magnetic field retarding of the permanent magnet 133, the falling speed of the hoisting container is reduced, the non-return supporting claw 2321 executes anti-falling tank supporting action, the energy-absorbing steel belt 222 provides non-return braking force, the hoisting container 30 is prevented from falling freely, and therefore the hoisting container 30 is enabled to be stably stopped within the overwinding distance;
s7, when the energy-absorbing steel strip 222 is broken, the lifting container 30 falls freely, at the moment, under the combined action of the permanent magnet speed-reducing device 10 and the non-return supporting claw 2321, the falling speed of the lifting container 30 is reduced, and finally the lifting container 30 is dragged by the base of the plastic-deformation steel strip buffering device 20, so that the safe braking of the lifting container 30 is realized.
The plastic-deformation steel belt buffer device is obviously superior to other traditional overwinding protection devices in performance, can be applied to the safety braking of large-tonnage and large-inertia lifting containers of kilometer deep wells and even ultra-kilometer deep wells by combining a permanent magnet eddy current retarding device, and integrates multiple functions of overwinding buffering, anti-collision supporting, quick resetting, water prevention, dust prevention and the like.
Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the details of the embodiments, and various equivalent modifications can be made within the technical spirit of the present invention, and the scope of the present invention is also within the scope of the present invention.
Claims (9)
1. The utility model provides an overwind protection device for deep well large-tonnage lift system which characterized in that: comprises a permanent magnet retarding device (10) and a plastic-deformation steel belt buffering device (20) which are arranged on a mine derrick;
the permanent magnet retarding device (10) comprises a pair of permanent magnet device supporting mechanisms (11), a permanent magnet sliding column mechanism (12) and a permanent magnet mechanism (13) which are symmetrically arranged, and further comprises a permanent magnet sliding column connecting mechanism (14);
the permanent magnet device supporting mechanism (11) comprises a permanent magnet device bracket (111), a permanent magnet slideway (112) and a permanent magnet bracket base (113); the permanent magnet device support (111) is arranged in the vertical direction and is fixed on the mine derrick; the horizontal cross section of the permanent magnet device bracket (111) is of a groove shape; the permanent magnet slide ways (112) are vertically arranged and respectively fixed on the inner sides of two parallel surfaces of the permanent magnet device bracket (111); the permanent magnet support base (113) is horizontally arranged at the bottom end of the permanent magnet device support (111);
the permanent magnet sliding column mechanism (12) comprises a permanent magnet sliding column shell (121) and a metal conductor plate (122); the horizontal cross section of the permanent magnet sliding column shell (121) is groove-shaped, and the groove opening of the permanent magnet sliding column shell (121) is opposite to the groove opening direction of the permanent magnet device bracket (111); the groove opening of the permanent magnet sliding column shell (121) is connected with the permanent magnet sliding way (112), and the permanent magnet sliding column shell (121) can freely slide along the permanent magnet sliding way (112); the metal conductor plate (122) is fixed in the permanent magnet sliding column shell (121);
the permanent magnet mechanism (13) is arranged in a groove of the permanent magnet device bracket (111) and is positioned between the side surface opposite to the opening of the groove of the permanent magnet device bracket (111) and the permanent magnet slideway (112); the permanent magnet mechanism (13) comprises a permanent magnet bracket (131), a permanent magnet cover plate (132) and a permanent magnet (133); the permanent magnet bracket (131) is fixed on the permanent magnet device bracket (111), the permanent magnet (133) is arranged in the permanent magnet bracket (131), and the permanent magnet cover plate (132) covers the permanent magnet and is fixedly connected with the permanent magnet bracket (131);
the permanent magnet sliding column mechanisms (12) are connected through permanent magnet sliding column connecting mechanisms (14); the permanent magnet sliding column connecting mechanism (14) comprises a permanent magnet sliding column connecting beam (141); the permanent magnet sliding column connecting beam (141) is horizontally arranged, and two ends of the permanent magnet sliding column connecting beam are respectively connected to the permanent magnet sliding column shells (121) which are symmetrically arranged;
the plastic-deformation steel belt buffer device (20) comprises a pair of plastic-deformation steel belt supporting mechanisms (21), a buffer sliding column mechanism (22) and a compression roller buffer mechanism (23) which are symmetrically arranged, and further comprises a buffer sliding column connecting mechanism (24);
the plastic-deformation steel belt supporting mechanism (21) comprises a plastic-deformation steel belt supporting frame (211), a buffering slideway (212), a plastic-deformation steel belt supporting base (213) and a plastic-deformation steel belt upper end cover (214);
the plastic-deformation steel belt supporting frame (211) is arranged in the vertical direction and is fixed on the mine derrick; the horizontal cross section of the permanent magnet device bracket (111) is of a groove shape; the buffering slide ways (212) are vertically arranged and respectively fixed on the inner sides of two parallel surfaces of the plastic-deformation steel strip support frame (211); the plastic-changing steel strip supporting base (213) is horizontally arranged at the bottom end of the plastic-changing steel strip supporting frame (211); the upper end cover (214) of the plastic-deformation steel belt is horizontally arranged at the top end of the plastic-deformation steel belt support frame (211);
the buffer sliding column mechanism (22) comprises a buffer sliding column shell (221) and an energy-absorbing steel belt (222); the horizontal cross section of the buffering slide column shell (221) is groove-shaped, and the groove opening of the buffering slide column shell (221) is opposite to the groove opening direction of the plastic-deformation steel belt support frame (211); the opening of the groove of the buffering slide column shell (221) is connected with the buffering slide way (212), and the buffering slide column shell (221) can freely slide along the buffering slide way (212); the bottom end of the energy-absorbing steel belt (222) is connected with the plastic-deformation steel belt supporting base (213), and the top end of the energy-absorbing steel belt (222) is connected with the plastic-deformation steel belt upper end cover (214);
the compression roller buffer mechanism (23) comprises a compression roller buffer mechanism shell (231), a non-return device (232), a static pressure roller mechanism (233) and a dynamic pressure roller mechanism (234);
the compression roller buffer mechanism shell (231) is vertically arranged on the plastic-deformation steel belt supporting base (213); a rectangular through hole which is penetrated in the horizontal direction is formed in the compression roller buffer mechanism shell (231); the non-return device (232) is arranged in the rectangular through hole and can slide in the rectangular through hole;
the static pressure roller mechanism (233) and the dynamic pressure roller mechanism (234) are respectively arranged on two sides of the energy-absorbing steel belt (222);
the static pressure roller mechanism (233) comprises a static pressure roller (2331) and a baffle shaft plate (2332); the shaft blocking plates (2332) are respectively fixed on the outer sides of two parallel surfaces of the buffering sliding column shell (221), and cylindrical roller bearing seats are arranged on the shaft blocking plates (2332); one end of the static pressure roller (2331) is connected with a cylindrical roller bearing seat of the baffle plate (2332) at one side, and the other end of the static pressure roller penetrates through two parallel surfaces of the buffering sliding column shell (221) in sequence and is connected with a cylindrical roller bearing seat arranged on the baffle plate (2332) at the other side;
the dynamic pressure roller mechanism (234) comprises a bearing seat bottom plate (2341), a dynamic pressure roller (2342), a linear bearing (2343), a roller supporting frame (2344) and a roller (2345);
the bearing seat bottom plate (2341) is vertically fixed on a shell of the compression roller buffer mechanism (23), a cylindrical roller bearing seat is fixed on one side surface of the bearing seat bottom plate (2341), and the dynamic pressure roller (2342) is arranged in the dynamic pressure roller cylindrical roller bearing seat in parallel with the bearing seat bottom plate (2341); a linear bearing (2343) is vertically fixed on the other side face of the bearing seat bottom plate (2341), and the roller (2345) is connected with the linear bearing (2343) through a roller supporting frame (2344);
the buffer sliding column mechanisms (22) are connected through buffer sliding column connecting mechanisms (24); the buffer strut connecting mechanism (24) comprises a buffer strut connecting beam (241); the buffer sliding column connecting beam (241) is horizontally arranged, and two ends of the buffer sliding column connecting beam are respectively connected to the buffer sliding column shells (221) which are symmetrically arranged.
2. The overwind protection device for the deep well large tonnage hoisting system according to claim 1, wherein: a limiting pin shaft (142) and a reinforcing rib (143) are arranged between the permanent magnet sliding column connecting beam (141) and the buffering sliding column shell (221), and a plastic plate (144) is further arranged on the bottom surface of the permanent magnet sliding column connecting beam (141).
3. The overwind protection device for the deep well large tonnage hoisting system according to claim 1, wherein: a limiting pin shaft (142) and a reinforcing rib (143) are arranged between the buffer sliding column connecting beam (241) and the buffer sliding column shell (221); the bottom surface of the buffer sliding column connecting beam (241) is also provided with a plastic plate (144).
4. The overwind protection device for the deep well large tonnage hoisting system according to claim 1, wherein: the permanent magnet support (131) consists of a plurality of rectangular supports, and rectangular permanent magnets are distributed in each group of rectangular supports; and a yoke iron plate (134) connected with the rectangular permanent magnet is also fixed at the bottom of the permanent magnet bracket (131).
5. The overwind protection device for the deep well large tonnage hoisting system according to claim 1, wherein: a rectangular through hole is formed in the permanent magnet cover plate (132), and a permanent magnet retarding air gap compensator (135) is distributed in the rectangular through hole; the permanent magnet retarding air gap compensator (135) is H-shaped, the bottom of the permanent magnet retarding air gap compensator is fixed on the permanent magnet cover plate (132), and the top of the permanent magnet retarding air gap compensator penetrates through the rectangular through hole and extends outwards.
6. The overwind protection device for the deep well large tonnage hoisting system according to claim 1, wherein: the non-return device (232) comprises a non-return supporting claw (2321); the non-return supporting claw (2321) is in a right-angled trapezoid shape, and one side of a right-angled edge extends into a rectangular through hole in the shell of the compression roller buffer mechanism (23); the non-return supporting claw (2321) is provided with a non-return pin shaft (2322) for limiting the movement of the non-return supporting claw (2321).
7. The overwind protection device for the deep well large tonnage hoisting system according to claim 1, wherein: the plastic-deformation steel belt supporting mechanism (21) further comprises a disc spring (215) and a screw rod fork (216); the bottom end of the screw rod fork (216) is connected with an energy-absorbing steel belt (222), and the top end of the screw rod fork is connected with a disc spring (215); the disc spring (215) is fixed at the bottom of the upper end cover (214) of the plastic deformation steel belt; and a buffer wood block (217) is also arranged in the upper end cover (214) of the plastic deformation steel belt.
8. The overwind protection device for the deep well large tonnage hoisting system according to claim 1, wherein: the permanent magnet retarding device (10) and the plastic-deformation steel belt buffering device (20) can be combined and matched for use, one group of permanent magnet retarding device (10) can be matched with a plurality of groups of plastic-deformation steel belt buffering devices (20) for use, and a plurality of groups of permanent magnet retarding devices (10) can be matched with one group of plastic-deformation steel belt buffering devices (20) for use.
9. The protection method of the overwind protection device for the deep well large-tonnage lifting system based on any one of claims 1 to 8 comprises the following steps:
s1, installing and fixing the overwinding protection device of the lifting system on a derrick in a shaft, and adjusting the rectangular permanent magnets in the permanent magnet mechanism (13) to enable the arrangement directions of magnetic circuits of adjacent magnetic permanent magnets to be opposite;
s2, when an overwinding accident occurs to the lifting system, the lifting container (30) rises to abut against the permanent magnet support base (113) and the permanent magnet sliding column connecting cross beam (141), the permanent magnet sliding column mechanism (12) is driven to vertically rise and move along the permanent magnet sliding way (112), at the moment, the metal conductor plate (122) in the permanent magnet sliding column mechanism (12) and the permanent magnet (133) in the permanent magnet mechanism (13) relatively displace, the metal conductor plate (122) cuts the magnetic induction lines of the permanent magnet (133), a large amount of induction current is generated in the metal conductor plate (122), and a current field generated by the induction current reacts on a main magnetic field to form resistance for blocking the permanent magnet sliding column mechanism (12) from rising, so that the lifting container (30) is decelerated;
s3, the lifting container (30) continues to rise after the speed is reduced, the inclined plane at the outer side of the backstop claw (2321) is stressed and retracted into the backstop device (232) after contacting the plastic-deformed steel strip supporting frame (211), and the lifting container (30) which is propped against the lower part of the buffer sliding column connecting beam (241) is locked, so that the buffer sliding column mechanism (22), the buffer sliding column connecting beam (241) and the lifting container (30) are locked together tightly, and the lifting container (30) is prevented from falling off;
s4, the lifting container (30) continues to rise after being locked, the dynamic pressure roller mechanism (234) is pressed by the buffer slideway (212) and moves to one side of the static pressure roller in the horizontal direction, and the energy-absorbing steel strip (222) generates plastic deformation under the repeated extrusion of the static pressure roller mechanism (233) and the dynamic pressure roller mechanism (234) and provides braking force to decelerate the lifting container (30); the buffer braking force is increased along with the rising of the lifting container (30), and after the braking force reaches the maximum value, the lifting container (30) is limited by the constant deformation force of the energy-absorbing steel belt (222) no matter the lifting container moves upwards or downwards; under the combined action of the non-return supporting claw (2321), the energy-absorbing steel belt (222), the static pressure roller mechanism (233) and the dynamic pressure roller mechanism (234), the overwound lifting container (30) can be reliably buffered and braked within an allowable overwind distance;
s5, when the energy-absorbing steel belt (222) and the lifting steel wire rope are not broken, the lifting container (30) rises to the top end, and the buffer sliding column connecting beam (241) is sleeved by a buffer wood block (217) located on the upper end cover (214) of the plastic deformation steel belt; the buffer wood block (217) can slow down the impact of the lifting container (30), meanwhile, the buffer sliding column connecting beam (241) can play a role of an anti-collision beam to protect the lifting container (30) from being damaged completely, the non-return supporting claw (2321) and the energy-absorbing steel belt (222) can lock the lifting container (30) to prevent falling back, and finally the lifting container (30) can be safely stopped within an overwinding distance;
s6, when a hoisting steel wire rope is broken, the hoisting container (30) falls freely, the permanent magnet retarding device (10) achieves magnetic field retarding of the permanent magnet (133) under the simultaneous action of the permanent magnet retarding device (10), the non-return supporting claw (2321) and the energy-absorbing steel belt (222), the falling speed of the hoisting container is reduced, the non-return supporting claw (2321) performs anti-falling tank supporting action, the energy-absorbing steel belt (222) provides non-return braking force, the hoisting container (30) is prevented from falling freely, and therefore the hoisting container (30) is stably stopped within an overwinding distance;
s7, when the energy-absorbing steel strip (222) breaks, the lifting container (30) falls freely, at the moment, under the combined action of the permanent magnet retarding device (10) and the non-return supporting claw (2321), the falling speed of the lifting container (30) is slowed down, and finally the lifting container (30) is dragged by the base of the plastic-deformation steel strip buffering device (20), so that the safety brake of the lifting container (30) is realized.
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| CN202110996220.4A CN113911875B (en) | 2021-08-27 | 2021-08-27 | Overwinding protection device and method for deep well large-tonnage lifting system |
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| CN202110996220.4A CN113911875B (en) | 2021-08-27 | 2021-08-27 | Overwinding protection device and method for deep well large-tonnage lifting system |
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| CN113911875B (en) | 2023-08-25 |
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