CN113911875B - 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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- CN113911875B CN113911875B CN202110996220.4A CN202110996220A CN113911875B CN 113911875 B CN113911875 B CN 113911875B CN 202110996220 A CN202110996220 A CN 202110996220A CN 113911875 B CN113911875 B CN 113911875B
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- permanent magnet
- steel belt
- buffer
- plastic deformation
- lifting
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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
-
- 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 symmetrically arranged permanent magnet device supporting mechanism, a permanent magnet sliding column mechanism, a permanent magnet mechanism and a permanent magnet sliding column connecting mechanism; the plastic deformation steel belt buffering device comprises a plastic deformation steel belt supporting mechanism, a buffering slide column mechanism, a compression roller buffering mechanism and a buffering slide column connecting mechanism which are symmetrically distributed. The device and the method can realize the functions of anti-collision, buffering, tank supporting, quick resetting and the like of the lifting device, and then reduce or even eliminate the potential safety hazard caused by over-winding and over-unwinding 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, along with the lack of surface coal beds and the continuous increase of energy demands, the mining depth of mines is continuously increased, the operation speed of lifting containers is continuously increased, the lifting capacity of mines is continuously increased, and the mine production is increasingly developed to the directions of large-scale, centralized and efficient. Therefore, the continuous development of mining systems puts higher demands on the safety and reliability of the operation of mine hoists.
Vertical shaft lifting is used as a main form of mine production and transportation, is a 'throat' of mine production, and is used for lifting materials, equipment and personnel along a shaft, so that the safety protection of a lifting system is an important link of mine production, but the problem of overwinding a lifting container in the mine lifting system always disturbs the safety production of a mine. Although the existing mine lifting system has various electric appliance protection and backup protection, the over-rolling accident still occurs at time due to the fact that the lifting container is fast in speed and the braking deceleration is limited to a certain extent when the mine lifting system is over-rolled, light persons influence mine production, and heavy persons cause equipment damage and personnel injury.
The conventional overwinding protection device at present has the following steps: wooden wedge cage guide, elastic deformation buffer, plastic deformation buffer, hydraulic buffer and friction type buffer etc. these conventional overwinding protection devices all adopt the mode of contact braking, therefore have that frictional force is great, influence on equipment damage is big, equipment life is low etc. defect. Particularly in a deep well large-tonnage lifting system, the quality, the kinetic energy and the inertia of a lifting container are larger due to the fact that the environment of a kilometer deep well is more complex, and the use requirements of the system on reliability and stability are difficult to meet only by means of the conventional mode.
Compared with the conventional overwinding protection device, the overwinding protection device has the characteristics of smaller braking force, lower reliability, inapplicability to high-speed braking, incapability of meeting the overwinding safety protection requirement of a deep well large-tonnage lifting system, and the magnetic retarding braking is used as a non-contact braking mode, has the characteristics of no abrasion, no heat fading phenomenon, stable braking, high reliability and the like, and is a potential braking technology applicable to the overwinding protection system of the deep well large-tonnage lifting container.
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 device can only retard the moving part and cannot realize final braking, so that the permanent magnet retarding device is mostly matched with the traditional braking mode for use, and the moving part is braked finally by the traditional braking mode after being retarded by the permanent magnet.
Therefore, the invention provides a novel overwinding protection device scheme adopting a combination of a permanent magnet retarding device and a plastic deformation steel belt buffering device, in particular to an overwinding protection device and method for a deep well large-tonnage lifting system.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problem to be solved by the invention is to provide the overwinding protection device and the protection method for the deep well large-tonnage lifting system, and the device can realize the functions of collision prevention, buffering, can supporting, quick resetting and the like of the lifting device, so that the potential safety hazard caused by overwinding and overwinding accidents in the mine transportation process is reduced or even eliminated.
In order to solve the technical problems, the invention adopts the following technical scheme:
an overwinding protection device for a deep well large-tonnage lifting system comprises a permanent magnet retarding device and a plastic steel belt buffering device which are arranged on a mine derrick.
The permanent magnet retarder comprises a symmetrically arranged permanent magnet device supporting mechanism, a permanent magnet sliding column mechanism, a permanent magnet mechanism and a permanent magnet sliding column connecting mechanism.
The permanent magnetic device supporting mechanism comprises a permanent magnetic device bracket, a permanent magnetic slideway and a permanent magnetic 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 a groove; the permanent magnet slide ways are distributed in the vertical direction 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 a groove, and the groove opening of the permanent magnet sliding column shell is opposite to the groove opening direction of the permanent magnet device bracket; the groove opening of the permanent magnet sliding column shell is connected with the permanent magnet sliding way, and the permanent magnet sliding column shell can freely slide along the permanent magnet sliding way; the metal conductor plate is fixed in the permanent magnet slide column shell.
The permanent magnet mechanism is arranged in the groove of the permanent magnet device bracket and is positioned between the opposite side surface of the groove opening 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 device comprises a permanent magnet device support, a permanent magnet cover plate and a permanent magnet cover plate, wherein the permanent magnet support is fixed on the permanent magnet device support, the permanent magnet is arranged in the permanent magnet support, and the permanent magnet cover plate covers the permanent magnet and is fixedly connected with the permanent magnet support.
The permanent magnet sliding column mechanisms are connected through a permanent magnet sliding column connecting mechanism; the permanent magnet sliding column connecting mechanism comprises a permanent magnet sliding column connecting beam; the permanent magnet sliding column connecting cross beams are horizontally arranged, and two ends of each permanent magnet sliding column connecting cross beam are respectively connected to symmetrically arranged permanent magnet sliding column shells.
The plastic deformation steel belt buffering device comprises a plastic deformation steel belt supporting mechanism, a buffering slide column mechanism, a compression roller buffering mechanism and a buffering slide column connecting mechanism which are symmetrically distributed.
The plastic deformation steel belt supporting mechanism comprises a plastic deformation steel belt supporting frame, a buffer slideway, a plastic deformation steel belt supporting base and a plastic deformation steel belt 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 a groove; the buffer slide ways are distributed in the vertical direction and are respectively fixed on the inner sides of two parallel surfaces of the plastic deformation steel belt support frame; the plastic deformation steel belt supporting base is horizontally arranged at the bottom end of the plastic deformation steel belt supporting frame; and 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 buffering slide column mechanism comprises a buffering slide column shell and an energy absorption steel belt; the horizontal cross section of the buffering slide column shell is a groove, and the opening of the groove of the buffering slide column shell is opposite to the opening of the groove of the plastic deformation steel belt support frame; the groove opening 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 deformation steel belt supporting base, and the top end of the energy-absorbing steel belt is connected with the upper end cover of the plastic deformation steel belt.
The compression roller buffer mechanism comprises a compression roller buffer mechanism shell, a backstop 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 penetrating in the horizontal direction is formed in the compression roller buffer mechanism shell; the backstop 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 shaft baffle; the baffle shaft plates are respectively fixed on the outer sides of the two parallel surfaces of the buffer slide column shell, and cylindrical roller bearing seats are arranged on the baffle shaft 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 sequentially penetrates through the two parallel surfaces of the buffering slide column shell and is connected with the cylindrical roller bearing seat of 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 support frame and rollers.
The bearing seat bottom plate is vertically fixed on the compression roller buffer mechanism shell, 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; the other side surface of the bearing seat bottom plate is vertically fixed with a linear bearing, and the roller is connected with the linear bearing through a roller support frame.
The buffer slide column mechanisms are connected through a buffer slide column connecting mechanism; the buffer slide column connecting mechanism comprises a buffer slide column connecting cross beam; the buffer sliding column connecting cross beam is horizontally arranged, and two ends of the buffer sliding column connecting cross beam are respectively connected to symmetrically arranged buffer sliding column shells.
As a further preferred aspect of the invention, a limiting pin shaft and a reinforcing rib are arranged between the permanent magnet sliding column connecting beam and the buffer sliding column shell, and a plastic plate is also arranged on the bottom surface of the permanent magnet sliding column connecting beam.
As a further preferred aspect of the invention, a limiting pin shaft and a reinforcing rib are arranged between the buffer slide column connecting beam and the buffer slide column shell; the bottom surface of the buffering slide column connecting beam is also provided with a plastic plate.
As a further preferred aspect of the invention, the permanent magnet support is composed of a plurality of rectangular supports, and rectangular permanent magnets are arranged in each group of rectangular supports; and a yoke iron plate connected with the rectangular permanent magnet is also fixed at the bottom of the permanent magnet bracket.
As a further preferred aspect of the invention, a rectangular through hole is arranged on the permanent magnet cover plate, and a permanent magnet retarding air gap compensator is arranged in the rectangular through hole; the permanent magnet retarding air gap compensator is H-shaped, the bottom is fixed on the permanent magnet cover plate, and the top penetrates through the rectangular through hole and extends outwards.
As a further preferred aspect of the present invention, the backstop device includes a backstop pawl; the non-return supporting claw is in a right-angle trapezoid shape, and one side of the right-angle side extends into a rectangular through hole in the compression roller buffer mechanism shell; the backstop supporting claw is provided with a backstop pin shaft for limiting the movement of the backstop supporting claw.
As a further preferred aspect of the present invention, the plastic deformation steel belt supporting mechanism further comprises a belleville spring and a screw fork; the bottom end of the screw fork is connected with an energy absorption steel belt, and the top end of the screw fork is connected with a disc spring; the belleville springs are fixed at the bottom of the upper end cover of the plastic deformation steel belt; and a buffer wood block is further arranged in the upper end cover of the plastic deformation steel belt.
As a further preferred aspect of the invention, the permanent magnet retarding device and the plastic deformation steel belt buffering device can be combined and matched for use, one group of permanent magnet retarding device 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 one group of plastic deformation steel belt buffering devices for use.
The protection method of the overwinding protection device for the deep well large-tonnage lifting system specifically comprises the following steps:
s1, installing and fixing an overwinding protection device of a lifting system on a derrick in a shaft, and adjusting rectangular permanent magnets in a permanent magnet mechanism to enable the magnetic circuit arrangement directions of adjacent magnetic permanent magnets to be opposite;
S2, when an overwinding accident occurs in the lifting system, the lifting container is lifted to prop against the permanent magnet support base and the permanent magnet slide column connecting cross beam to drive the permanent magnet slide column mechanism to vertically lift along the permanent magnet slide way, at the moment, a metal conductor plate in the permanent magnet slide column mechanism and a permanent magnet in the permanent magnet mechanism relatively displace, the metal conductor plate cuts a magnetic induction line 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 is reacted to a main magnetic field, and resistance for preventing the permanent magnet slide column mechanism from lifting is formed, so that the lifting container is decelerated;
s3, after the speed of the lifting container is reduced, the lifting container continuously rises, the inclined surface on the outer side of the inverted support claw contacts the plastic deformation steel belt supporting frame and is stressed to be retracted into the inverted device, and the lifting container propped under the buffer slide column connecting beam is locked, so that the buffer slide column mechanism, the buffer slide column connecting beam and the lifting container are tightly locked together, and the lifting container is prevented from falling off;
s4, after the lifting container is locked, continuously ascending, pressing the dynamic pressure roller mechanism by the buffer slideway, moving to one side of the static pressure roller in the horizontal direction, and plastically deforming the energy-absorbing steel belt under repeated extrusion of the static pressure roller mechanism and the dynamic pressure roller mechanism and providing braking force to enable the lifting container to be decelerated; along with the rising of the lifting container, the buffer braking force is increased along with the rising, and after the braking force reaches the maximum value, the lifting container moves upwards or downwards and is limited by the constant deformation force of the energy-absorbing steel belt; 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 overwinding lifting container can reliably buffer and brake within the allowable overwinding distance;
S5, when the energy-absorbing steel belt and the lifting steel wire rope are not broken, the lifting container is lifted to the top end, and the buffer sliding column connecting cross beam is sleeved by a buffer wood block positioned on the upper end cover of the plastic deformation steel belt; the impact of the lifting container can be slowed down by the buffering wood blocks, meanwhile, the buffer slide column connecting cross beam can play a role of an anti-collision beam to protect the lifting container from being damaged, the lifting container can be locked by the backstop supporting claw and the energy-absorbing steel belt to prevent falling back, and finally, the lifting container is safely stopped within the overwinding distance;
s6, when the lifting steel wire rope breaks, the lifting container falls freely, at the moment, under the simultaneous effects 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 lifting container is reduced, the non-return supporting claw executes the falling prevention and supporting can action, the energy-absorbing steel belt provides non-return braking force to prevent the lifting container from falling freely, and therefore the lifting container is stably stopped within the overwinding distance;
and S7, when the energy-absorbing steel belt breaks, the lifting container falls freely, and at the moment, the falling speed of the lifting container is slowed down under the combined action of the permanent magnet retarding device and the non-return supporting claw, and finally the lifting container is dragged by the base of the plastic deformation steel belt buffering device, so that the safety braking 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 lifting systems such as winding type lifting systems, friction type lifting systems and the like, has strong adaptability, and is more convenient to install, use and maintain.
2. The plastic steel belt buffer device has obviously better performance than other traditional overwinding protection devices, is combined with a permanent magnet eddy current retarder, and can be applied to the safety braking of large-tonnage large-inertia lifting containers of kilometers deep wells, even ultra-kilometers deep wells.
3. The hollow sleeve frame of the integral external structure of the lifting system overwinding protection device is welded on the derrick, and when an overwinding accident occurs, the device distributes the buffer braking force and the stress of the anti-collision beam to the multi-layer derrick beam through the hollow sleeve frame, so that the stress condition of the derrick is greatly improved, and meanwhile, the hollow sleeve frame also plays a role in reinforcing 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 steel belt buffering device. When an overwinding accident occurs, the permanent magnet eddy current retarder firstly carries out non-contact retarding braking on the lifting container, and the retarding braking effect is good, and then the lifting container is subjected to buffering braking under the combined action of the permanent magnet eddy current retarder and the lifting container, so that the impact load and the damage of the plastic deformation steel belt buffer device can be reduced when the accident occurs, the service life of equipment is greatly prolonged, the use times of the plastic deformation steel belt buffer device are increased, meanwhile, the device can also effectively control the overspeed operation of a lifting system, and the safety coefficient of a deep well lifting system is improved.
5. The invention integrates the functions of overwinding buffering, anti-collision supporting can, quick resetting, water proofing, dust proofing and the like, and particularly has the supporting can function, thereby well meeting the requirements of the 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 great total lifting container 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 overwinding protection device of the lifting system.
Fig. 2 is a schematic diagram of a permanent magnet retarder structure according to the present invention.
Fig. 3 is a partial cross-sectional view of the permanent magnet retarding device of the present invention.
Fig. 4 is a schematic structural view of the permanent magnet mechanism of the present invention.
Fig. 5 is a schematic diagram of the permanent magnet circuit of the permanent magnet retarding device of the present invention.
Fig. 6 is a block diagram of three permanent magnet retarder air gap compensators of the permanent magnet mechanism of the present invention.
Fig. 7 is a schematic diagram of the basic working principle of the permanent magnet retarder of the invention.
FIG. 8 is a schematic view of the structure of the plastic deformation steel belt buffering device of the present invention.
FIG. 9 is a cross-sectional view of the belleville spring mounting arrangement of the present invention.
FIG. 10 is a schematic view of a buffering strut mechanism according to the present invention
FIG. 11 is a schematic view of a buffering mechanism for a press roller according to the present invention.
Fig. 12 is a schematic view of a baffle plate structure of the hydrostatic roller mechanism of the present invention.
Fig. 13 is a schematic view of the dynamic pressure roller mechanism of the present invention.
Fig. 14 is a schematic view of the structure of the lifting container of the present invention.
Fig. 15 is a flowchart of the overwinding protection operation of the overwinding protection device of the lifting system.
The method comprises the following steps:
10. a permanent magnet retarding device; 11. a permanent magnet device supporting mechanism; 111. a permanent magnet device holder; 112. permanent magnet slideway; 113. a permanent magnet support base; 12. a permanent magnet strut mechanism; 121. a permanent magnet spool housing; 122. a metal conductor plate; 13. a permanent magnet mechanism; 131. a permanent magnet holder; 132. a permanent magnet cover plate; 133. a permanent magnet; 134. a yoke plate; 135. a permanent magnet retarding air gap compensator; 14. a permanent magnet slide column connecting mechanism; 141. the permanent magnet sliding column is connected with the cross beam; 142. limiting pin shafts; 143. reinforcing ribs; 144. a plastic plate;
20. a plastic steel belt buffer device; 21. a plastic steel belt supporting mechanism; 211. a plastic steel belt supporting frame; 212. buffering the slideway; 213. a plastic steel belt supporting base; 214. a plastic steel belt upper end cover; 215. a belleville spring; 216. a screw fork; 217. buffering the wood blocks; 22. a buffer strut mechanism; 221. a buffer strut housing; 222. energy absorbing steel belts; 23. a press roller buffer mechanism; 231. a press roller buffer mechanism housing; 232. a backstop device; 2321. a backstop claw; 2322. a non-return pin shaft; 233. a hydrostatic roller mechanism; 2331. static press roller; 2332. a shaft baffle plate; 234. a dynamic pressure roller mechanism; 2341. a bearing pedestal bottom plate; 2342. a movable press roll; 2343. a linear bearing; 2344. a roller support; 2345. a roller; 24. a buffer strut connecting mechanism; 241. the buffer sliding column is connected with the cross beam;
30. Lifting the container.
Detailed Description
In the description of the present invention, it should be understood that the terms "left", "right", "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and "first", "second", etc. do not indicate the importance of the components, and thus are not to be construed as limiting the present invention. The specific dimensions adopted in the present embodiment are only for illustrating the technical solution, and do not limit the protection scope of the present invention.
The invention will be described in further detail with reference to the drawings and the detailed description.
An overwinding protection device for a deep well large-tonnage lifting system is shown in fig. 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 3, the permanent magnetic retarder 10 includes a pair of symmetrically arranged permanent magnetic device supporting mechanisms 11, a permanent magnetic strut mechanism 12, a permanent magnetic strut mechanism 13, and a permanent magnetic strut connecting mechanism 14.
The permanent magnetic device supporting mechanism 11 comprises a permanent magnetic device bracket 111, a permanent magnetic slideway 112 and a permanent magnetic bracket base 113; the permanent magnet device support 111 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 a groove; the permanent magnet slide ways 112 are arranged in the vertical direction and are 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 slide column mechanism 12 comprises a permanent magnet slide column shell 121 and a metal conductor plate 122; the horizontal cross section of the permanent magnet slide column housing 121 is a groove, and the groove opening of the permanent magnet slide column housing 121 is opposite to the groove opening direction of the permanent magnet device bracket 111; the opening of the groove of the permanent magnet slide column shell 121 is connected with the permanent magnet slide way 112, and the permanent magnet slide column shell 121 can freely slide along the permanent magnet slide 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 opposite side surface of 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 bracket 131 is composed of a plurality of rectangular brackets, and rectangular permanent magnets are arranged in each group of rectangular brackets; a yoke plate 134 connected with the rectangular permanent magnet is also fixed at the bottom of the permanent magnet bracket 131.
As shown in fig. 5, when rectangular permanent magnets are arranged, the directions of magnetic circuits of adjacent permanent magnets are opposite, so that the magnetic circuits of the adjacent permanent magnets are beneficial 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 arranged 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 of the permanent magnet retarding air gap compensator penetrates through the rectangular through hole and extends outwards.
As shown in fig. 6, the permanent-magnet retarding air gap compensator can be selected to be in the forms 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 foil sheets with high magnetic conductivity are arranged above the permanent magnet, and the iron foil sheets are respectively L, V and H. The braking effect of the H-shaped air gap compensation structure is optimal and is about three times of the permanent magnetic retarding braking force of the air gap-free compensation structure, so that the permanent magnetic retarding air gap compensator 135 is mostly of an H-shaped structure, and other forms can be alternatively applied to the H-shaped air gap compensator.
The permanent magnet sliding column mechanisms 12 are connected through a permanent magnet sliding column connecting mechanism 14; the permanent magnet slide column connecting mechanism 14 comprises a permanent magnet slide 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 symmetrically arranged permanent magnet sliding column shells 121. A limiting pin shaft 142 and a reinforcing rib 143 are arranged between the permanent magnet slide column connecting beam 141 and the buffer slide column shell 221, and a plastic plate 144 is further arranged on the bottom surface of the permanent magnet slide column connecting beam 141.
The upper and lower sides of the permanent magnet sliding column connecting beam 141 are provided with straight slot-shaped grooves, so that the weight of the beam is reduced on the premise of meeting the use strength, and the damage generated 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 prop against the permanent magnet support base 113 and the permanent magnet slide column connecting beam 14 to drive the permanent magnet slide column mechanism 12 to vertically rise along the permanent magnet slide rail 112, at this time, the metal conductor plate 122 in the permanent magnet slide column mechanism 12 and the permanent magnet 133 in the permanent magnet mechanism 13 are relatively displaced, the metal conductor plate 122 cuts the magnetic induction line of the permanent magnet 133, a large amount of induced current is generated in the metal conductor plate 122, and the current field generated by the induced current reacts to the main magnetic field to form resistance for blocking the permanent magnet slide column 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 to convert the kinetic energy of the moving object into electric energy by utilizing the Faraday electromagnetic induction principle, and finally the electric energy is converted into heat energy to be dissipated, so that the kinetic energy of the moving object is reduced, and the aim of retarding is fulfilled.
As shown in fig. 8, the plastic deformation steel belt buffering device 20 comprises a pair of symmetrically arranged plastic deformation steel belt supporting mechanisms 21, buffering slide column mechanisms 22 and compression roller buffering mechanisms 23, and further comprises a buffering slide column connecting mechanism 24.
The plastic deformation steel belt supporting mechanism 21 comprises a plastic deformation steel belt supporting frame 211, a buffer slideway 212, a plastic deformation steel belt supporting base 213 and a plastic deformation steel belt upper end cover 214.
The plastic 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 a groove; the buffer slide ways 212 are arranged in the vertical direction and are respectively fixed on the inner sides of two parallel surfaces of the plastic deformation steel belt supporting frame 211; the plastic deformation steel belt supporting base 213 is horizontally arranged at the bottom end of the plastic deformation steel belt supporting frame 211; the upper end cover 214 of the plastic deformation steel belt is horizontally arranged at the top end of the support frame 211 of the plastic deformation steel belt.
The plastic deformation steel belt supporting mechanism 21 further comprises a disc spring 215 and a screw fork 216; the bottom end of the screw fork 216 is connected with an energy-absorbing steel belt 222, and the top end of the screw fork is connected with a belleville spring 215; the belleville springs 215 are fixed at the bottom of the plastic deformation steel belt upper end cover 214; a buffer wood block 217 is also arranged in the plastic deformation steel belt upper end cover 214.
As shown in fig. 9, the large diameter end of the belleville spring 215 is downward, the topmost belleville spring 215 points to any direction, and the adjacent springs have the same diameter and size to contact, so that the belleville spring 215 has the function of compensating the initial deformation of the energy-absorbing steel belt 222, preventing the energy-absorbing steel belt 222 from being broken due to the sudden impact of a container, and simultaneously, the energy-absorbing steel belt 222 can deform 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 band 222; the horizontal cross section of the buffer slide column shell 221 is a groove, and the opening of the groove of the buffer slide column shell 221 is opposite to the opening of the groove of the plastic deformation steel belt supporting frame 211; the groove opening of the buffer slide column shell 221 is connected with the buffer slide way 212, and the buffer slide column shell 221 can freely slide along the buffer 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 is connected with the plastic deformation steel belt upper end cover 214.
As shown in fig. 11, the platen buffer mechanism 23 includes a platen buffer mechanism housing 231, a backstop 232, a hydrostatic roller mechanism 233, and a hydrodynamic roller mechanism 234.
The press roller buffer mechanism housing 231 is vertically arranged on the plastic deformation steel belt supporting base 213; a rectangular through hole penetrating in the horizontal direction is arranged on the press roller buffer mechanism shell 231; the backstop 232 is disposed within and slidable within the rectangular through-hole. The backstop 232 includes backstop pawl 2321; the non-return supporting claw 2321 is in a right-angle trapezoid shape, and one side of a right-angle side extends into a rectangular through hole on the shell of the compression roller buffer mechanism 23; the backstop pawl 2321 is provided with a backstop pin 2322 that restricts movement of the backstop pawl 2321. The outer inclined surface of the backstop claw 2321 is stressed to retract into the backstop device 232 after contacting the plastic deformation steel belt supporting frame 211, and locks the lifting container 30 propped under the buffer slide column connecting beam 241, so that the buffer slide column mechanism 22, the buffer slide column connecting beam 241 and the lifting container 30 are tightly 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 two sides of the energy-absorbing steel belt 222. The number of the static pressure roller mechanisms 233 and the dynamic pressure roller mechanisms 234 in the compression roller buffer mechanism 23 is not less than 3, on the premise of meeting the use requirement of the energy-absorbing steel belt 222, a plurality of static pressure roller mechanisms 233 and dynamic pressure roller mechanisms 234 can be arranged alternatively, the energy-absorbing steel belt 222 passes through a gap between the static pressure roller mechanisms 233 and the dynamic pressure roller mechanisms 234 in an up-down staggered manner, and larger braking force can be provided.
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 buffer slide column shell 221, and as shown in fig. 12, cylindrical roller bearing seats are arranged on the shaft blocking plates 2332; one end of the hydrostatic roller 2331 is connected with the cylindrical roller bearing seat of the one-side baffle shaft plate 2332, and the other end sequentially passes through two parallel surfaces of the buffer slide column shell 221 and is connected with the cylindrical roller bearing seat arranged on the other-side baffle shaft plate 2332.
As shown in fig. 13, the roller pressing mechanism 234 includes a bearing base plate 2341, a roller pressing plate 2342, a linear bearing 2343, a roller support 2344, and a roller 2345.
The bearing seat bottom plate 2341 is vertically fixed on the 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; the other side surface 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 support frame 2344.
The buffer slide column mechanisms 22 are connected through a buffer slide column connecting mechanism 24; the buffer strut connecting mechanism 24 includes a buffer strut connecting beam 241; the buffer slide column connecting beams 241 are horizontally arranged, and two ends of each buffer slide column connecting beam are respectively connected to the symmetrically arranged buffer slide column shells 221. A limiting pin shaft 142 and a reinforcing rib 143 are arranged between the buffer slide column connecting beam 241 and the buffer slide column shell 221; the bottom surface of the bumper strut connecting rail 241 is also provided with a plastic plate 144.
The upper and lower sides of the buffer slide column connecting cross beam 241 are provided with straight slot-shaped grooves, so that the weight of the cross beam is reduced on the premise of meeting the use strength, and the damage generated when the lifting container 30 and the buffer slide column connecting cross beam 241 collide is reduced.
As shown in fig. 14, the maximum dead weight of the lifting container 30 which can be accommodated by the permanent magnet retarder 10 and the plastic deformation steel belt buffer 20 is 50t, the maximum load is 45t, and the maximum external dimension of the container body is 7700×3800×11100mm. Rectangular grooves with bearing are processed on two sides of the lifting container 30, and when an overwinding accident occurs, the backstop supporting claws 2321 can enter the rectangular grooves to support the cans. The lifting container 30 may be made as a cage, skip or any other form that meets the above requirements and is applicable to the over-wrap 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 winding type lifting systems, friction type lifting systems and the like, has strong adaptability, and is more convenient to install, use and maintain.
The protection method of the overwinding protection device for the deep well large-tonnage lifting system specifically comprises the following steps:
s1, installing and fixing an overwinding protection device of a lifting system on a derrick in a shaft, and adjusting rectangular permanent magnets in a permanent magnet mechanism 1 to enable the arrangement directions of magnetic circuits of adjacent magnetic permanent magnets to be opposite;
s2, when an overwinding accident occurs in the lifting system, the lifting container 30 is lifted to prop against the permanent magnet support base 113 and the permanent magnet slide column connecting beam 141 to drive the permanent magnet slide column mechanism 12 to vertically lift along the permanent magnet slide rail 112, at the moment, the metal conductor plate 122 in the permanent magnet slide column machine 12 and the permanent magnet in the permanent magnet mechanism 13 are subjected to relative displacement, the metal conductor plate 122 cuts a magnetic induction line 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 is reacted with a main magnetic field to form resistance for preventing the permanent magnet slide column mechanism 12 from lifting, and therefore the lifting container 30 is decelerated;
S3, after the speed of the lifting container 30 is reduced, the lifting container is continuously lifted, the inclined plane on the outer side of the backstop claw 2321 contacts the plastic deformation steel belt supporting frame 211 and is stressed to be retracted into the backstop device 232, and the lifting container 30 propped under the buffer slide column connecting beam 241 is locked, so that the buffer slide column mechanism 22, the buffer slide column connecting beam 241 and the lifting container 30 are tightly locked together, and the lifting container 30 is prevented from falling off;
s4, after the lifting container 30 is locked, the lifting container continues to ascend, the dynamic pressure roller mechanism 234 is pressed by the buffer slideway 212, moves to one side of the static pressure roller in the horizontal direction, and the energy-absorbing steel belt 222 is subjected to plastic deformation and provides braking force under repeated extrusion of the static pressure roller mechanism 233 and the dynamic pressure roller mechanism 234, so that the lifting container 30 is decelerated; as the lifting container 30 rises, the buffer braking force increases, and after the braking force reaches a maximum value, the lifting container 30 moves upwards or downwards and is limited by the constant deformation force of the energy-absorbing steel belt 222; 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 overwinding lifting container 30 can reliably buffer and brake within the allowable overwinding distance;
s5, when the energy-absorbing steel belt 222 and the lifting steel wire rope are not broken, the lifting container 30 is lifted to the top end, and the buffer strut connecting cross beam 241 is sleeved by the buffer wood block 217 positioned on the plastic deformation steel belt upper end cover 214; the buffer wood blocks 217 can slow down the impact of the lifting container 30, meanwhile, the buffer slide column connecting cross beam 241 can play a role of an anti-collision beam to protect the lifting container 30 from damage, the reverse stop 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 is safely stopped within an overwinding distance;
S6, when the lifting steel wire rope breaks, the lifting container (30) falls freely, at the moment, under the simultaneous actions 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 realizes the magnetic field retarding of the permanent magnet 133, the falling speed of the lifting container is reduced, the non-return supporting claw 2321 executes the anti-falling supporting action, the energy-absorbing steel belt 222 provides non-return braking force, the lifting container 30 is prevented from falling freely, and therefore the lifting container 30 is stably stopped within an overwinding distance;
and S7, when the energy-absorbing steel belt 222 breaks, the lifting container 30 falls freely, and 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 belt buffering device 20, so that the safety braking of the lifting container 30 is realized.
The plastic steel belt buffering device is obviously superior to other traditional overwinding protection devices in performance, can be applied to safety braking of large-tonnage and large-inertia lifting containers of kilometers deep wells and even ultra-kilometers deep wells by combining a permanent magnet eddy current retarding device, and integrates the functions of overwinding buffering, anti-collision supporting, quick resetting, water proofing, dust proofing and the like.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details of the above embodiments, and various equivalent changes can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the equivalent changes belong to the protection scope of the present invention.
Claims (7)
1. An overwinding protection device for a deep well large-tonnage lifting system is characterized in that: comprises a permanent magnet retarding device (10) and a plastic steel belt buffering device (20) which are arranged on a mine derrick;
the permanent magnet retarder (10) comprises a symmetrically arranged permanent magnet device supporting mechanism (11), a permanent magnet sliding column mechanism (12) and a permanent magnet mechanism (13), and also comprises a permanent magnet sliding column connecting mechanism (14);
the permanent magnetic device supporting mechanism (11) comprises a permanent magnetic device bracket (111), a permanent magnetic slideway (112) and a permanent magnetic bracket base (113); the permanent magnet device support (111) 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 a groove; the permanent magnet slide ways (112) are distributed in the vertical direction and are 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 slide column shell (121) is a groove, and the groove opening of the permanent magnet slide column shell (121) is opposite to the groove opening direction of the permanent magnet device bracket (111); the groove opening of the permanent magnet slide column shell (121) is connected with the permanent magnet slide way (112), and the permanent magnet slide column shell (121) can freely slide along the permanent magnet slide way (112); the metal conductor plate (122) is fixed in the permanent magnet slide column shell (121);
the permanent magnet mechanism (13) is arranged in the groove of the permanent magnet device bracket (111) and is positioned between the opposite side surfaces of the groove opening 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 device comprises a permanent magnet device bracket (111), a permanent magnet (133) and a permanent magnet cover plate (132), wherein 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); a rectangular through hole is formed in the permanent magnet cover plate (132), and a permanent magnet retarding air gap compensator (135) is arranged in the rectangular through hole; the permanent magnet retarding air gap compensator (135) is H-shaped, the bottom is fixed on the permanent magnet cover plate (132), and the top penetrates through the rectangular through hole and extends outwards;
The permanent magnet sliding column mechanisms (12) are connected through a permanent magnet sliding column connecting mechanism (14); the permanent magnet sliding column connecting mechanism (14) comprises a permanent magnet sliding column connecting beam (141); the permanent magnet sliding column connecting cross beam (141) is horizontally arranged, and two ends of the permanent magnet sliding column connecting cross beam are respectively connected to symmetrically arranged permanent magnet sliding column shells (121);
the plastic deformation steel belt buffering device (20) comprises a plastic deformation steel belt supporting mechanism (21), a buffering slide column mechanism (22) and a compression roller buffering mechanism (23) which are symmetrically distributed, and further comprises a buffering slide column connecting mechanism (24);
the plastic deformation steel belt supporting mechanism (21) comprises a plastic deformation steel belt supporting frame (211), a buffer 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 buffer slide ways (212) are distributed in the vertical direction and are respectively fixed on the inner sides of two parallel surfaces of the plastic deformation steel belt supporting frame (211); the plastic deformation steel belt supporting base (213) is horizontally arranged at the bottom end of the plastic deformation steel belt supporting frame (211); the upper plastic deformation steel belt end cover (214) is horizontally arranged at the top end of the plastic deformation steel belt supporting frame (211);
The buffering slide column mechanism (22) comprises a buffering slide column shell (221) and an energy absorption steel belt (222); the horizontal cross section of the buffer slide column shell (221) is a groove, and the groove opening of the buffer 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 buffer slide column shell (221) is connected with the buffer slide way (212), and the buffer slide column shell (221) can freely slide along the buffer slide way (212); the bottom end of the energy absorption steel belt (222) is connected with the plastic deformation steel belt supporting base (213), and the top end of the energy absorption steel belt 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 backstop 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 penetrating in the horizontal direction is formed in the compression roller buffer mechanism shell (231); the backstop device (232) is arranged in the rectangular through hole and can slide in the rectangular through hole;
the backstop device (232) comprises a backstop pawl (2321); the non-return supporting claw (2321) is in a right-angle trapezoid shape, and one side of a right-angle side extends into a rectangular through hole on the shell of the compression roller buffer mechanism (23); a backstop pin shaft (2322) for limiting the movement of the backstop claw (2321) is arranged on the backstop claw (2321);
The static pressure roller mechanism (233) and the dynamic pressure roller mechanism (234) are respectively arranged at 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 baffle plates (2332) are respectively fixed on the outer sides of two parallel surfaces of the buffer slide column shell (221), and cylindrical roller bearing seats are arranged on the shaft baffle plates (2332); one end of the static pressure roller (2331) is connected with a cylindrical roller bearing seat of the one-side baffle shaft plate (2332), and the other end sequentially passes through two parallel surfaces of the buffer slide column shell (221) and is connected with the cylindrical roller bearing seat of the other-side baffle shaft plate (2332);
the dynamic pressure roller mechanism (234) comprises a bearing seat bottom plate (2341), dynamic pressure rollers (2342), a linear bearing (2343), a roller support frame (2344) and rollers (2345);
the bearing seat bottom plate (2341) is vertically fixed on the 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 parallel to the bearing seat bottom plate (2341) and is arranged in the dynamic pressure roller cylindrical roller bearing seat; a linear bearing (2343) is vertically fixed on the other side surface of the bearing seat bottom plate (2341), and the roller (2345) is connected with the linear bearing (2343) through a roller support frame (2344);
The buffer slide column mechanisms (22) are connected through a buffer slide column connecting mechanism (24); the buffer slide column connecting mechanism (24) comprises a buffer slide column connecting cross beam (241); the buffer slide column connecting cross beams (241) are horizontally arranged, and two ends of each buffer slide column connecting cross beam are respectively connected to the symmetrically arranged buffer slide column shells (221).
2. An overwinding protection device for a deep well large tonnage lifting system according to claim 1, wherein: limiting pin shafts (142) and reinforcing ribs (143) are arranged between the permanent magnet sliding column connecting cross 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 cross beam (141).
3. An overwinding protection device for a deep well large tonnage lifting system according to claim 1, wherein: a limiting pin shaft (142) and a reinforcing rib (143) are arranged between the buffer slide column connecting beam (241) and the buffer slide column shell (221); the bottom surface of the buffering slide column connecting beam (241) is also provided with a plastic plate (144).
4. An overwinding protection device for a deep well large tonnage lifting system according to claim 1, wherein: the permanent magnet brackets (131) are composed of a plurality of rectangular brackets, and rectangular permanent magnets are arranged in each group of rectangular brackets; and a yoke plate (134) connected with the rectangular permanent magnet is also fixed at the bottom of the permanent magnet bracket (131).
5. An overwinding protection device for a deep well large tonnage lifting system according to claim 1, wherein: the plastic deformation steel belt supporting mechanism (21) further comprises a disc spring (215) and a screw fork (216); the bottom end of the screw fork (216) is connected with an energy-absorbing steel belt (222), and the top end of the screw fork is connected with a belleville spring (215); the belleville springs (215) are fixed at the bottom of the upper end cover (214) of the plastic deformation steel belt; and a buffer wood block (217) is further arranged in the plastic deformation steel belt upper end cover (214).
6. An overwinding protection device for a deep well large tonnage lifting system according to claim 1, wherein: the permanent magnet retarding device (10) and the plastic deformation steel belt buffering devices (20) can be combined and matched, one group of permanent magnet retarding devices (10) can be matched with a plurality of groups of plastic deformation steel belt buffering devices (20), 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).
7. A protection method based on the overwinding protection device for the deep well large tonnage lifting system according to any one of claims 1-6, which specifically comprises the following steps:
s1, installing and fixing an overwinding protection device of a lifting system on a derrick in a shaft, and adjusting rectangular permanent magnets in a 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 in the lifting system, the lifting container (30) is lifted to prop against the permanent magnet support base (113) and the permanent magnet slide column connecting beam (141) to drive the permanent magnet slide column mechanism (12) to vertically lift and move along the permanent magnet slide way (112), at the moment, the metal conductor plate (122) in the permanent magnet slide column mechanism (12) and the permanent magnet (133) in the permanent magnet mechanism (13) are subjected to relative displacement, the metal conductor plate (122) cuts a magnetic induction line 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 is reacted with a main magnetic field to form resistance for preventing the permanent magnet slide column mechanism (12) from lifting, so that the lifting container (30) is decelerated;
s3, after the speed of the lifting container (30) is reduced, the lifting container continuously ascends, the outer inclined surface of the reverse stop supporting claw (2321) is stressed to be retracted into the reverse stop device (232) after contacting the plastic deformation steel belt supporting frame (211), and the lifting container (30) propped under 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 tightly locked together, and the lifting container (30) is prevented from falling off;
s4, after the lifting container (30) is locked, the lifting container continuously ascends, 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 subjected to plastic deformation and provides braking force under repeated extrusion of the static pressure roller mechanism (233) and the dynamic pressure roller mechanism (234), so that the lifting container (30) is decelerated; as the lifting container (30) rises, 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 (30) moves upwards or downwards and is limited by the constant deformation force of the energy-absorbing steel belt (222); 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 overwinding lifting container (30) can be reliably buffered and braked within the allowable overwinding distance;
S5, when the energy-absorbing steel belt (222) and the lifting steel wire rope are not broken, the lifting container (30) is lifted to the top end, and the buffer slide column connecting cross beam (241) is sleeved by the buffer wood block (217) positioned on the plastic deformation steel belt upper end cover (214); the buffer wood blocks (217) can slow down the impact of the lifting container (30), meanwhile, the buffer sliding column connecting cross beam (241) can play a role of an anti-collision beam to protect the lifting container (30) from being damaged, the reverse stop supporting claw (2321) and the energy absorption steel belt (222) can lock the lifting container (30) to prevent falling back, and finally, the lifting container (30) is safely stopped within the overwinding distance;
s6, when the lifting steel wire rope is broken, the lifting container (30) falls freely, at the moment, under the simultaneous actions of the permanent magnet retarding device (10), the backstop supporting claw (2321) and the energy-absorbing steel belt (222), the permanent magnet retarding device (10) realizes the magnetic field retarding of the permanent magnet (133), the falling speed of the lifting container is reduced, the backstop supporting claw (2321) executes the anti-falling supporting tank action, the energy-absorbing steel belt (222) provides backstop braking force, and the lifting container (30) is prevented from falling freely, so that the lifting container (30) is stably stopped within the overwinding distance;
And S7, when the energy-absorbing steel belt (222) is broken, the lifting container (30) falls freely, and 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 is dragged by the base of the plastic deformation steel belt buffering device (20), so that the safety braking of the lifting container (30) is realized.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2570232Y (en) * | 2002-06-27 | 2003-09-03 | 周克家 | Vertical-lift system overwind distance internal plastic non-return buffer unit |
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| CN102674107B (en) * | 2012-06-05 | 2014-04-09 | 太原理工大学 | Pulleying cushioning device of mine vertical shaft hoisting system |
| CN103848299A (en) * | 2012-12-03 | 2014-06-11 | 吴旭榕 | Construction elevator of building under construction |
| KR101566656B1 (en) * | 2015-03-31 | 2015-11-05 | 윤여모 | A brake system for stage properties |
| CN106494961B (en) * | 2016-12-05 | 2018-09-21 | 中国矿业大学 | A kind of deep-well lifting system overtravel protection method and apparatus |
| CN106698147B (en) * | 2016-12-05 | 2018-09-21 | 中国矿业大学 | A kind of deep-well lifting system intelligence anti-drop method and device |
| CN110577127B (en) * | 2018-06-08 | 2024-06-07 | 迈格钠磁动力股份有限公司 | Mine transportation equipment with safety retarder and safety operation method thereof |
| CN110429773B (en) * | 2019-08-08 | 2024-03-29 | 江西森阳科技股份有限公司 | Buffering superposition device for permanent magnet rotor of neodymium-iron-boron permanent magnet synchronous motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2570232Y (en) * | 2002-06-27 | 2003-09-03 | 周克家 | Vertical-lift system overwind distance internal plastic non-return buffer unit |
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