CN108557607B - Cage overspeed protection device based on radar speed measurement and protection method thereof - Google Patents
Cage overspeed protection device based on radar speed measurement and protection method thereof Download PDFInfo
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- CN108557607B CN108557607B CN201810226039.3A CN201810226039A CN108557607B CN 108557607 B CN108557607 B CN 108557607B CN 201810226039 A CN201810226039 A CN 201810226039A CN 108557607 B CN108557607 B CN 108557607B
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- locking device
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- 238000007405 data analysis Methods 0.000 claims abstract description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 11
- 238000012423 maintenance Methods 0.000 claims description 8
- 230000003068 static effect Effects 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 4
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- 101100460844 Mus musculus Nr2f6 gene Proteins 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
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Classifications
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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
- B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
- B66B5/044—Mechanical overspeed governors
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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
- B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
- B66B5/06—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed electrical
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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
- B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
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Abstract
The utility model discloses a cage overspeed protection device based on radar speed measurement and a protection method thereof. The radar microwave module in the radar speed measuring sensor is responsible for transmitting and receiving radar microwaves, carries out frequency mixing processing on the transmitted and received waves to obtain an output difference frequency signal, supplies the signal to a subsequent circuit, carries out data analysis and processing on the signal through the STM32 singlechip to obtain a speed value, and directly detects the speed of the cage. The overspeed protection self-locking device can adjust the position of the supporting steel plate in the T-shaped hole by adjusting the T-shaped nut, so that the braking force and the braking time of the friction block on the cage guide can be adjusted. When the speed is beyond the allowable range, the overspeed protection self-locking device can be tightly held on the cage guide to rapidly brake, so that personnel safety in the cage is protected, and the effects of directly detecting the speed of the cage and rapidly braking are realized.
Description
Technical Field
The utility model relates to the technical field of lifting of mine materials and personnel, in particular to a cage overspeed protection device based on radar speed measurement and a protection method thereof.
Background
As an important device for lifting materials and personnel in mines, the safety of the cage is particularly important. In order to ensure safe operation of the cage, the cage is provided with anti-falling devices, and the anti-falling devices can tightly hold the brake rope to brake when the rope is broken, so that the cage is prevented from falling down to cause casualties. In the prior art, the cage is provided with electrical protection and mechanical protection for overspeed protection, the existing cage overspeed detection device is used for detecting the rotating speed of the output shaft of the ground motor to roughly and indirectly detect the cage speed, and the accuracy of cage speed detection is insufficient. The utility model of a cage overspeed protection device with the patent number of 2014207188093 comprises a speed measuring part, a component force part and a braking part, wherein the speed measuring part, the component force part and the braking part are used for swinging a centrifugal block under the action of centrifugal force when the cage exceeds a set speed limit value, driving a braking line to pull a wedge-shaped block to clamp a guiding steel wire rope for tightly holding and braking. The overspeed detection device is arranged above the cage and used for detecting the real-time speed of the cage, meanwhile, the overspeed protection self-locking device is innovatively designed by referring to the enclasping device, once overspeed is detected, the self-locking device enables the motor to move under the control of the singlechip, so that the cage can be locked and enclasped to be braked when running up and down, and is enclasped on a cage guide, stable braking is realized, and the cage can continue to work after maintenance is completed. The cage speed can be directly measured, and the motor of the overspeed protection self-locking device is controlled by the singlechip to work under the overspeed condition of the cage, so that the overspeed protection self-locking device is tightly held on a cage guide to quickly brake the cage.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a cage overspeed protection device based on radar speed measurement and a protection method thereof, which aim to directly measure cage speed, and an STM32 singlechip is used for controlling a motor of an overspeed protection self-locking device to work under the condition of overspeed of a cage, so that the overspeed protection self-locking device is tightly held on a cage guide to quickly brake the cage.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the cage overspeed protection device based on radar speed measurement comprises a cage body, an overspeed detection device and an overspeed protection self-locking device.
Cage body includes the cage, the cage top is installed the cage, overspeed detection device includes the brace table, brace table fixed mounting is on the base of cage, brace table and radar speed sensor screw connection, radar speed sensor and STM32 singlechip electric connection, STM32 singlechip and dual relay electric connection, dual relay and motor electric connection, STM32 singlechip and alarm electric connection, the alarm is installed in the cage.
The overspeed protection self-locking device comprises a motor, an output shaft of the motor is connected with an input shaft coupler of a worm gear reducer, the output shaft of the worm gear reducer is connected with a gear through a key, the gear is meshed with a rack, the rack is arranged at one end of the side face of a cage, the upper end of the worm gear reducer is fixedly connected with a connecting plate, the lower end of the worm gear reducer is connected with a right guiding support bracket, the right guiding support bracket is connected with a right sliding block bracket, the right sliding block bracket is connected with a left sliding block bracket, the left sliding block bracket is connected with a left guiding support bracket, rectangular grooves of the left sliding block bracket and the right sliding block bracket are respectively arranged with a left linear bearing and a right linear bearing, the left linear bearing and the right linear bearing are respectively fixedly arranged on a left extending plate and a right extending plate of the rack, one end of the left guiding support bracket is connected with the worm gear reducer, the other end of the left guiding support bracket is connected with the left sliding block bracket, the upper end of the left guide support bracket is fixedly connected with a connecting plate, the connecting plate is respectively hinged with one end of a first connecting rod, one end of a second connecting rod, one end of a fifth connecting rod and one end of a sixth connecting rod, the other end of the first connecting rod is hinged with one end of a third connecting rod, the third connecting rod is fixedly connected with a first friction block, the other end of the third connecting rod is hinged with the upper end of a first support steel plate, the first support steel plate is arranged in a T-shaped hole through a first T-shaped nut, the number of the first T-shaped nut and the number of the T-shaped hole are two, the other end of the second connecting rod is hinged with one end of a fourth connecting rod, the fourth connecting rod is fixedly connected with the second friction block, the other end of the fourth connecting rod is hinged with the upper end of the first support steel plate, the other end of the fifth connecting rod is hinged with one end of a seventh connecting rod, the seventh connecting rod is fixedly connected with the third friction block, the other end of the seventh connecting rod is hinged with the upper end of the second supporting steel plate, the other end of the sixth connecting rod is hinged with one end of the eighth connecting rod, the eighth connecting rod is fixedly connected with the fourth friction block, the other end of the eighth connecting rod is hinged with the upper end of the second supporting steel plate, the second supporting steel plate is installed in the T-shaped hole through second T-shaped nuts, and the number of the second T-shaped nuts is two.
The cage overspeed protection device based on radar speed measurement and the protection method thereof are characterized in that: the method comprises the following steps:
step A), starting to initialize, and enabling the cage to work normally;
and B), a radar microwave module in the radar speed measuring sensor is responsible for transmitting and receiving radar microwaves, mixing the transmitted and received waves to obtain an output difference frequency signal, supplying the signal to a subsequent circuit, and comparing a speed value obtained by data analysis and processing of an STM32 singlechip with a cage speed limiting value Vs:
a) When the speed limit value Vs of the cage is not exceeded, the cage operates normally, and the motor of the overspeed protection self-locking device does not work.
b) And C) when the cage speed limit value Vs is exceeded, executing the step C).
Step C): STM32 singlechip control double relay comes control motor clockwise to move, and the gear makes the contained angle reduce between head rod, the second connecting rod under overspeed protection self-locking device's first supporting steel sheet structure effect thereby drive the distance between the first friction block on the third connecting rod and the second friction block on the fourth connecting rod and reduce, when the friction block touches the cage guide, realizes the auto-lock under cage and overspeed protection self-locking device's gravity effect, hugs tightly the cage guide for the cage is braked immediately.
And D), when the cage is completely braked, namely in a static state, after the cage is overhauled, the STM32 singlechip controls the double relays to control the motor to rotate anticlockwise, controls the rotating angle of the gear to restore to the initial position, and the cage continues to work.
And E), when the cage goes up, the cage is in a state of:
c) When the speed limit value Vs of the cage is not exceeded, the cage operates normally, and the motor of the overspeed protection self-locking device does not work.
d) And when the cage speed limit value Vs is exceeded, executing the step F).
Step F): STM32 singlechip control double relay comes control motor anticlockwise direction operation, and the gear makes the contained angle between fifth connecting rod, the sixth connecting rod reduce thereby drive the distance between the third friction block on the seventh connecting rod and the fourth friction block on the eighth connecting rod under overspeed protection self-locking device's second supporting steel plate structure effect and reduces, when the friction block touches the cage guide, realizes the auto-lock under cage and overspeed protection self-locking device's inertial action, hugs tightly the cage guide for the cage is braked immediately.
And G), when the cage is completely braked, namely in a static state, after the cage is overhauled, the STM32 singlechip controls the double relays to control the motor to rotate clockwise, controls the rotating angle of the gear to restore to the initial position, and the cage continues to work.
The utility model has the beneficial effects that:
1. the radar microwave module in the radar speed measuring sensor is responsible for transmitting and receiving radar microwaves, carries out frequency mixing processing on the transmitted and received waves to obtain an output difference frequency signal, supplies the signal to a subsequent circuit, carries out data analysis and processing through a singlechip to obtain a speed value, is arranged on a cage, can carry out real-time speed measurement along with the movement of the cage, obtains the actual running speed of the cage, realizes the direct detection of the cage speed, and is not influenced by polar interference and electromagnetic interference, and chemical substances, dust, salt mist, rainwater, washing and mechanical vibration.
2. The overspeed protection self-locking device can adjust the position of the supporting steel plate in the T-shaped hole by adjusting the T-shaped nut, so that the braking force and the braking time of the friction block on the cage guide can be adjusted, and once the cage is overspeed, the STM32 singlechip rapidly controls the motor of the overspeed protection self-locking device to realize the hugging self-locking and rapid braking of the friction block on the cage guide.
3. The speed of the cage can be directly detected, when the speed exceeds the allowable range, the overspeed protection self-locking device can be directly held tightly on the cage guide to carry out rapid braking, so that the safety of personnel in the cage is protected, and the effects of directly detecting the speed of the cage and rapidly braking are realized.
Drawings
The present specification includes the following drawings, the contents of which are respectively:
FIG. 1 is a schematic view of the overall assembled front structure of the present utility model;
FIG. 2 is a schematic view of the overall assembled left side construction of the present utility model;
FIG. 3 is a schematic view of the right side construction of the general assembly portion of the present utility model;
FIG. 4 is a right side schematic view of the overspeed protection self-locking device of the present utility model;
FIG. 5 is a schematic view of the left side structure of the overspeed protection self-locking device of the present utility model;
FIG. 6 is a schematic view of the right guide support bracket of the present utility model;
FIG. 7 is a schematic view of the left guide support bracket of the present utility model;
FIG. 8 is a schematic view of the right slider bracket of the present utility model;
FIG. 9 is a schematic view of the left slider bracket of the present utility model;
FIG. 10 is a schematic view of a first support steel plate structure of the present utility model;
FIG. 11 is a schematic diagram of cage speed detection of the present utility model;
fig. 12 is a sequential functional diagram of the present utility model.
Marked in the figure as:
1. cage, 2 cage ears, 3 bracket table, 4 radar speed sensor, 5 overspeed protection self-locking device, 51 motor, 52 worm gear reducer, 53 connecting plate, 541 right guide support bracket, 542 left guide support bracket, 543 right slider bracket, 544 left slider bracket, 551 rack, 552T-shaped hole, 553 right extension plate, 554 left extension plate, 555 right linear bearing, 556 left linear bearing, 56 gear, 571 first connecting rod, 572 second connecting rod, 573 third connecting rod, 574 fourth connecting rod, 575 first friction block, 576 second friction block, 581 fifth connecting rod, 582 sixth connecting rod, 583 seventh connecting rod, 584 eighth connecting rod, 585 third friction block, 586 fourth friction block, 59 first support steel plate, 591 first T-shaped nut, 510 second support steel plate, 1 second T-shaped nut.
Detailed Description
The following detailed description of the embodiments of the utility model, given by way of example only, is presented in the accompanying drawings to aid in a more complete, accurate and thorough understanding of the concepts and aspects of the utility model, and to aid in its practice, by those skilled in the art.
As shown in fig. 1 to 5, the cage overspeed protection device based on radar speed measurement comprises a cage body, an overspeed detection device and an overspeed protection self-locking device 5.
As shown in fig. 1 to 3, the cage body comprises a cage 1, a cage ear 2 is installed above the cage 1, the overspeed detection device comprises a support table 3, the support table 3 is fixedly installed on a base of the cage ear 2, the support table 3 is connected with a radar speed measuring sensor 4 through screws, the angle between the radar speed measuring sensor 4 and a target object, namely a well wall, is 35+/-5 degrees, the installation distance between the radar speed measuring sensor 4 and the target surface, namely the well wall surface, is 457-1219mm, the radar speed measuring sensor 4 is electrically connected with an STM32 single chip microcomputer, the STM32 single chip microcomputer is electrically connected with an alarm, the motor 51 is electrically connected with the double relay, and the alarm is installed in the cage. The radar microwave module in the radar speed sensor 4 is responsible for transmitting and receiving radar microwaves, mixes the transmitted and received waves to obtain an output difference frequency signal, and supplies the signal to a subsequent circuit to perform data analysis and processing through a singlechip to obtain a speed value, wherein a target object is a well wall. The Radar speed measuring sensor 4 is Radar III, and the appearance is 103x 86x 79mm.
As shown in fig. 4 to 10, the overspeed protection self-locking device 5 comprises a motor 51, an output shaft of the motor 51 is connected with an input shaft coupler of a worm gear reducer 52, an output shaft of the worm gear reducer 52 is connected with a gear 56 through a key, the gear 56 is meshed with a rack 551, the rack 551 is arranged at one side of the cage 1, the upper end of the worm gear reducer 52 is fixedly connected with a connecting plate 53 and the lower end is connected with a right guiding support bracket 541, the right guiding support bracket 541 is connected with a right sliding block bracket 543, the right sliding block bracket 543 is connected with a left sliding block bracket 544, the left sliding block bracket 544 is connected with a left guiding support bracket 542, rectangular grooves of the left sliding block bracket 544 and the right sliding block bracket 543 are respectively arranged with a left linear bearing 556 and a right linear bearing 555, the left linear bearing 556 and the right linear bearing 555 are respectively fixedly arranged on a left extending plate 554 and a right extending plate 553 of the rack 551, the left guiding support bracket 542 is connected with the worm gear reducer 52 at one end and the left slider bracket 544 at the other end, the upper end of the left guiding support bracket 542 is fixedly connected with the connecting plate 53, the connecting plate 53 is hinged with one end of the first connecting rod 571, one end of the second connecting rod 572, one end of the fifth connecting rod 581 and one end of the sixth connecting rod 582, the other end of the first connecting rod 571 is hinged with one end of the third connecting rod 573, the third connecting rod 573 is fixedly connected with the first friction block 575, the other end of the third connecting rod 573 is hinged with the upper end of the first supporting steel plate 59, the first supporting steel plate 59 is arranged in the T-shaped hole 552 through the first T-shaped nut 591, the number of the first T-shaped nut 591 and the number of the T-shaped hole 552 are two, the other end of the second connecting rod 572 is hinged with one end of the fourth connecting rod 574, the fourth connecting rod 574 is fixedly connected with the second friction block 576, the other end of the fourth connecting rod 574 is hinged to the upper end of the first supporting steel plate 59, the other end of the fifth connecting rod 581 is hinged to one end of the seventh connecting rod 583, the seventh connecting rod 583 is fixedly connected with the third friction block 585, the other end of the seventh connecting rod 583 is hinged to the upper end of the second supporting steel plate 510, the other end of the sixth connecting rod 582 is hinged to one end of the eighth connecting rod 584, the eighth connecting rod 584 is fixedly connected with the fourth friction block 586, the other end of the eighth connecting rod 584 is hinged to the upper end of the second supporting steel plate 510, the second supporting steel plate 510 is installed in the T-shaped hole 552 through second T-shaped nuts 5101, and the number of the second T-shaped nuts 5101 is two.
As shown in fig. 1 to 12, the cage overspeed protection device based on radar speed measurement and the protection method thereof are characterized in that: the method comprises the following steps:
step A), starting to initialize, and enabling the cage 1 to work normally;
and B, a radar microwave module in the radar speed measuring sensor 4 is responsible for transmitting and receiving radar microwaves, mixing the transmitted and received waves to obtain an output difference frequency signal, supplying the signal to a subsequent circuit, and comparing a speed value obtained by data analysis and processing of an STM32 singlechip with a speed limit value Vs of the cage 1:
a) When the speed limit value Vs of the cage 1 is not exceeded, the cage 1 normally operates and overspeed protection self-locking device
The motor 51 of the device 5 does not operate.
b) And C) when the speed limit value Vs of the cage 1 is exceeded, executing the step C).
Step C): the STM32 singlechip controls the double relays to control the motor 51 to run clockwise, the gear 56 moves downwards along the rack 551, the included angle between the first connecting rod 571 and the second connecting rod 572 is reduced under the structural action of the first supporting steel plate 59 of the overspeed protection self-locking device 5, so that the distance between the first friction block 575 on the third connecting rod 573 and the second friction block 576 on the fourth connecting rod 574 is reduced, and when the friction blocks touch the cage guide, self-locking is realized under the gravity action of the cage 1 and the overspeed protection self-locking device 5, and the cage guide is held tightly, so that the cage 1 is braked immediately.
And D), when the cage 1 is completely braked, namely in a static state, after maintenance is completed, the STM32 singlechip controls the double relays to control the motor 51 to rotate anticlockwise, controls the rotating angle of the gear 56 to restore to the initial position, and the cage 1 continues to work.
Step E), when the cage 1 ascends:
c) When the speed limit value Vs of the cage 1 is not exceeded, the cage 1 operates normally, and the motor 51 of the overspeed protection self-locking device 5 does not operate.
d) And when the speed limit value Vs of the cage 1 is exceeded, executing the step F).
Step F): the STM32 singlechip controls the double relays to control the motor to run anticlockwise, the gear 56 moves upwards along the rack 551, the included angle between the fifth connecting rod 581 and the sixth connecting rod 582 is reduced under the structural action of the second supporting steel plate 510 of the overspeed protection self-locking device 5, so that the distance between the third friction block 585 on the seventh connecting rod 583 and the fourth friction block 586 on the eighth connecting rod 584 is reduced, when the friction blocks touch the cage guide, self-locking is realized under the inertial action of the cage 1 and the overspeed protection self-locking device 5, and the cage guide is held tightly, so that the cage 1 is braked immediately.
And G), when the cage 1 is completely braked, namely in a static state, after maintenance, the STM32 singlechip controls the double relays to control the motor 51 to rotate clockwise, controls the rotating angle of the gear 56 to restore to the initial position, and the cage 1 continues to work.
Cage overspeed protection device based on radar speed measurement and protection method thereof are as follows:
before the cage 1 goes down the well, the STM32 singlechip and the motor 51 are in an electrified state, and friction blocks in the overspeed protection self-locking device 5 are in an open state; when the cage 1 descends, the well wall is used as a target object, a radar microwave module in the radar speed measuring sensor 4 is responsible for transmitting and receiving radar microwaves, the transmitted and received waves are subjected to frequency mixing treatment to obtain an output difference frequency signal, the signal is supplied to a subsequent circuit, the speed value obtained by data analysis and processing through an STM32 singlechip is compared with a cage 1 speed limiting value Vs, when the speed limiting value Vs of the cage 1 is not exceeded, the overspeed protection self-locking device 5 does not work, the cage 1 is in a normal working state, when the speed limiting value Vs of the cage 1 is exceeded, the STM32 singlechip controls a double relay to control the motor 51 to rotate clockwise to drive the gear 56 to move downwards along the rack 551, the included angle between the first connecting rod 571 and the second connecting rod 572 is reduced under the structural action of a first supporting steel plate 59 of the overspeed protection self-locking device 5, so that the distance between a first friction block 575 on the third connecting rod 573 and a second friction block 576 on the fourth connecting rod is reduced, and when the friction block touches a cage guide, the cage 1 is locked tightly by holding under the action of gravity of the cage 1 and the overspeed protection self-locking device 5, and the cage 1 is braked immediately. At this time, an overspeed signal is transmitted to ground staff, a ground braking device can be manually opened by the ground staff to brake a winding drum, the cage 1 can be prevented from shaking during maintenance of the maintenance staff, double braking is realized at the same time when interference is caused to the maintenance, after the maintenance is complete, the STM32 singlechip controls the double relay to control the motor 51 to work anticlockwise, the initial position is recovered through controlling the rotating angle of the gear 56, and the cage 1 continues to work under the action of a steel wire main rope. When the cage 1 ascends, the radar microwave module in the radar speed measuring sensor 4 is responsible for transmitting and receiving radar microwaves, mixing the transmitted and received waves to obtain an output difference frequency signal, supplying the signal to a subsequent circuit, comparing a speed value obtained by data analysis and processing through the STM32 singlechip with a cage 1 speed limiting value Vs, when the speed limiting value Vs of the cage 1 is not exceeded, the cage 1 overspeed protection self-locking device 5 does not work, when the speed of the cage 1 is detected to exceed the limiting value Vs, the STM32 singlechip controls the double relay to control the motor 51 to run anticlockwise, the gear 56 moves upwards along the rack 551, and the included angle between the fifth connecting rod 581 and the sixth connecting rod 582 is reduced under the action of the second supporting steel plate 510 of the overspeed protection self-locking device 5, so that the distance between the third friction block 585 on the seventh connecting rod 583 and the fourth friction block 586 on the eighth connecting rod 584 is reduced, and when the friction block touches the cage 1, the cage 1 is locked tightly by inertia under the inertia effect of the overspeed protection self-locking device 5, so that the cage 1 is braked immediately. At this time, an overspeed signal is transmitted to ground staff, a ground braking device is manually opened by the ground staff, so that a winding drum is braked, the cage 1 shakes when an inspector is prevented from overhauling, interference is caused to overhauling, double braking is realized at the same time, after the inspection is correct, the STM32 singlechip controls the double relays to control the motor 51 to rotate clockwise, the initial position is recovered through controlling the rotating angle of the gear 56, and the cage 1 continues to work under the action of a steel wire main rope.
Claims (1)
1. A cage overspeed protection device protection method based on radar speed measurement comprises a cage body, an overspeed detection device and an overspeed protection self-locking device:
the cage body comprises a cage, a cage shoe is arranged above the cage shoe, the overspeed detection device comprises a support table, the support table is fixedly arranged on a base of the cage shoe, the support table is connected with a radar speed measuring sensor through a screw, the radar speed measuring sensor is electrically connected with an STM32 singlechip, the STM32 singlechip is electrically connected with a double relay, the double relay is electrically connected with a motor, the STM32 singlechip is electrically connected with an alarm, and the alarm is arranged in the cage shoe;
the overspeed protection self-locking device comprises a motor, an output shaft of the motor is connected with an input shaft coupler of a worm gear reducer, the output shaft of the worm gear reducer is connected with a gear through a key, the gear is meshed with a rack, the rack is arranged at one end of the side face of a cage, the upper end of the worm gear reducer is fixedly connected with a connecting plate, the lower end of the worm gear reducer is connected with a right guiding support bracket, the right guiding support bracket is connected with a right sliding block bracket, the right sliding block bracket is connected with a left sliding block bracket, the left sliding block bracket is connected with a left guiding support bracket, rectangular grooves of the left sliding block bracket and the right sliding block bracket are respectively arranged with a left linear bearing and a right linear bearing, the left linear bearing and the right linear bearing are respectively fixedly arranged on a left extending plate and a right extending plate of the rack, one end of the left guiding support bracket is connected with the worm gear reducer, the other end of the left guiding support bracket is connected with the left sliding block bracket, the upper end of the left guide support bracket is fixedly connected with a connecting plate, the connecting plate is respectively hinged with one end of a first connecting rod, one end of a second connecting rod, one end of a fifth connecting rod and one end of a sixth connecting rod, the other end of the first connecting rod is hinged with one end of a third connecting rod, the third connecting rod is fixedly connected with a first friction block, the other end of the third connecting rod is hinged with the upper end of a first support steel plate, the first support steel plate is arranged in a T-shaped hole through a first T-shaped nut, the number of the first T-shaped nut and the number of the T-shaped hole are two, the other end of the second connecting rod is hinged with one end of a fourth connecting rod, the fourth connecting rod is fixedly connected with the second friction block, the other end of the fourth connecting rod is hinged with the upper end of the first support steel plate, the other end of the fifth connecting rod is hinged with one end of a seventh connecting rod, the seventh connecting rod is fixedly connected with the third friction block, the other end of the seventh connecting rod is hinged with the upper end of the second supporting steel plate, the other end of the sixth connecting rod is hinged with one end of the eighth connecting rod, the eighth connecting rod is fixedly connected with the fourth friction block, the other end of the eighth connecting rod is hinged with the upper end of the second supporting steel plate, the second supporting steel plate is installed in the T-shaped hole through second T-shaped nuts, and the number of the second T-shaped nuts is two;
the method is characterized in that: the protection method of the cage overspeed protection device based on radar speed measurement comprises the following steps:
step A), starting to initialize, and enabling the cage to work normally;
and B), a radar microwave module in the radar speed measuring sensor is responsible for transmitting and receiving radar microwaves, mixing the transmitted and received waves to obtain an output difference frequency signal, supplying the signal to a subsequent circuit, and comparing a speed value obtained by data analysis and processing of an STM32 singlechip with a cage speed limiting value Vs:
a) When the speed limit value Vs of the cage is not exceeded, the cage operates normally, and a motor of the overspeed protection self-locking device does not work;
b) C) when the speed limit value Vs of the cage is exceeded, executing the step C);
step C): the STM32 singlechip controls the double relays to control the motor to run clockwise, the gear moves downwards along the rack, the included angle between the first connecting rod and the second connecting rod is reduced under the action of the first supporting steel plate structure of the overspeed protection self-locking device, so that the distance between the first friction block on the third connecting rod and the second friction block on the fourth connecting rod is reduced, when the friction blocks touch the cage guide, self-locking is realized under the action of gravity of the cage and the overspeed protection self-locking device, and the cage guide is held tightly, so that the cage guide is braked immediately;
step D), when the cage is completely braked, namely in a static state, after maintenance is complete, the STM32 singlechip controls the double relays to control the motor to rotate anticlockwise, controls the rotation angle of the gear to restore to the initial position, and the cage continues to work;
and E), when the cage goes up, the cage is in a state of:
c) When the speed limit value Vs of the cage is not exceeded, the cage operates normally, and a motor of the overspeed protection self-locking device does not work;
d) F, when the speed limit value Vs of the cage is exceeded, executing the step F);
step F): the STM32 singlechip controls the double relays to control the motor to run anticlockwise, the gear moves upwards along the rack, the included angle between the fifth connecting rod and the sixth connecting rod is reduced under the action of the second supporting steel plate structure of the overspeed protection self-locking device, so that the distance between the third friction block on the seventh connecting rod and the fourth friction block on the eighth connecting rod is reduced, when the friction blocks touch the cage guide, self-locking is realized under the inertia action of the cage and the overspeed protection self-locking device, and the cage guide is held tightly, so that the cage guide is braked immediately;
and G), when the cage is completely braked, namely in a static state, after the cage is overhauled, the STM32 singlechip controls the double relays to control the motor to rotate clockwise, controls the rotating angle of the gear to restore to the initial position, and the cage continues to work.
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| CN201810226039.3A CN108557607B (en) | 2018-03-19 | 2018-03-19 | Cage overspeed protection device based on radar speed measurement and protection method thereof |
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| CN1261048A (en) * | 1998-12-22 | 2000-07-26 | 奥蒂斯电梯公司 | Device and apparatus for determining speed of elevator |
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| CN201626746U (en) * | 2009-11-25 | 2010-11-10 | 泰安联谊矿山电器科技有限公司 | Anti-falling device for over-speed car with rope in vertical shaft hoisting cage |
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| CN107344690A (en) * | 2017-08-29 | 2017-11-14 | 湖州高恒电梯配件有限公司 | A kind of elevator falling-proof brake device |
| CN208150723U (en) * | 2018-03-19 | 2018-11-27 | 安徽理工大学 | A kind of cage overspeed protective device based on radar velocity measurement |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1261048A (en) * | 1998-12-22 | 2000-07-26 | 奥蒂斯电梯公司 | Device and apparatus for determining speed of elevator |
| CN2878302Y (en) * | 2006-04-07 | 2007-03-14 | 王晓越 | Novel safety drop preventer for gear rack transmission construction lifter |
| CN201626746U (en) * | 2009-11-25 | 2010-11-10 | 泰安联谊矿山电器科技有限公司 | Anti-falling device for over-speed car with rope in vertical shaft hoisting cage |
| CN106044454A (en) * | 2016-07-28 | 2016-10-26 | 常州信息职业技术学院 | Elevator car system and elevator car falling automatic detecting and braking device thereof |
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| CN108557607A (en) | 2018-09-21 |
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