CN107055253B - Elevator accidental movement amount control device with buffer gradable braking function - Google Patents
Elevator accidental movement amount control device with buffer gradable braking function Download PDFInfo
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- CN107055253B CN107055253B CN201710148036.8A CN201710148036A CN107055253B CN 107055253 B CN107055253 B CN 107055253B CN 201710148036 A CN201710148036 A CN 201710148036A CN 107055253 B CN107055253 B CN 107055253B
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- movable wedge
- elevator
- electromagnet
- wedge block
- brake
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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
- B66B5/22—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 by means of linearly-movable wedges
Abstract
An elevator accidental movement amount control device with buffer gradable braking relates to a traction type elevator. The elevator car control system is composed of two groups of symmetrical independent brake units, wherein the two groups of symmetrical independent brake units respectively control the accidental movement of the elevator car up and down; each group of brake units is provided with a roller, a movable wedge block, a brake butterfly spring group, a brake butterfly spring force adjusting rod, a movable wedge block orientation rod, a gap adjusting sheet, a movable wedge block guide plate, a base, a roller ejector rod assembly, an electromagnet armature return stop block, an electromagnet armature return stop assembly and an electromagnet mounting plate; the roller, the movable wedge block, the brake butterfly spring group, the brake butterfly spring force adjusting rod, the movable wedge block orientation rod, the gap adjusting sheet, the movable wedge block guide plate, the roller ejector rod assembly, the electromagnet armature return stop block, the electromagnet armature return stop assembly and the electromagnet mounting plate form an integral structure through the base. The two groups of symmetrical independent brake units are symmetrically arranged at the positions of the guide shoes of the original car of the upper beam of the elevator car top.
Description
Technical Field
The invention relates to a traction type elevator, in particular to an accidental movement amount control device of an elevator with buffer gradable braking.
Background
At present, the braking mode of a traction type elevator (hereinafter referred to as an elevator) after stopping running is that a braking part rigidly connected with an elevator traction sheave is pressed and stopped after a braking shoe or a pad is applied by spring force, and the braking mode is characterized by soft braking depending on friction force. This braking force is also the force that keeps the car stationary after the elevator has stopped running. Therefore, the technical safety standard of the related elevator provides requirements for the elevator, and in China, for the elevator before being put into operation and the annual inspection elevator, no-load ascending and 125% rated load descending are required, and a power failure test is carried out at normal operation speed, so that whether the braking capacity and the traction capacity of the elevator brake meet the requirements or not is checked. However, in the actual operation of the elevator, the braking capability of the elevator is often reduced due to artificial adjustment or abnormal change of the braking spring force, contact abrasion of a braking shoe or a pad, or heating carbonization; in addition, friction between the elevator traction wire rope and the traction sheave is reduced or disappears due to the reduction or failure of the traction capacity of the elevator. The elevator car is slightly rushed to the top or squat to the bottom, and the passengers are seriously injured or killed by shearing or falling, which happens occasionally.
From 2016, 7, 1 and the beginning, the national technical requirements for elevatorsThe elevator car is provided with a car accidental movement protection device which is required to reliably stop the car at the latest when the car leaves a flat position by 1.2m and the deceleration of the stop at the maintenance speed is not more than 1.0m/s in the case of accidental movement of the elevator car 2 . At the same time, for the requirements of the traction elevator, in the case of an electrical fault caused by an internal control device, it is assumed that the attainable acceleration is not more than 2.5m/s 2 。
Chinese patent CN105460730A discloses a monitoring brake system and method for a traction type elevator, which is used to solve the problem of accidents of the elevator caused by the problem of the elevator brake system in the prior art. There is computer lab system includes: a traction wheel and a guide wheel are arranged in the machine room, a spare brake wheel is arranged above the spare brake wheel and separated from the traction wheel, the installation position ensures that the cage and the counterweight do not rub each other when performing relative motion of up-down reciprocation, one end of a traction rope is fixed at the top end of a hoistway, the other end of the traction rope passes through the lower part of a cage return rope wheel and passes through the upper part of the traction wheel, the lower part of the spare brake wheel, the upper part of the guide wheel and the lower part of a counterweight return rope wheel and is fixedly connected to a rope hitch plate; and the wheel speed sensor is arranged on the spare brake wheel and used for detecting the moving speed of the lift car. The monitoring brake system is powered off and stopped in a fault, and does not rub the brake wheel under normal conditions, so that abrasion does not exist. Therefore, even if the band-type brake of the tractor is old and careless for maintenance, the safety can be ensured.
Disclosure of Invention
The invention aims to provide an elevator accidental movement amount control device with buffer gradable braking, which can realize the graded braking of an elevator with buffer after the elevator stops running and control the elevator with the accidental movement amount of the elevator car after the elevator stops running, and meets the national technical requirements on the elevator.
The invention consists of two groups of symmetrical and independent braking units which respectively control the accidental movement of the elevator car up and down; each group of brake units is provided with a roller, a movable wedge block, a brake butterfly spring group, a brake butterfly spring force adjusting rod, a movable wedge block orientation rod, a gap adjusting sheet, a movable wedge block guide plate, a base, a roller ejector rod assembly, an electromagnet armature return stop block, an electromagnet armature return stop assembly and an electromagnet mounting plate;
the roller, the movable wedge block, the brake butterfly spring group, the brake butterfly spring force adjusting rod, the movable wedge block orientation rod, the gap adjusting sheet, the movable wedge block guide plate, the roller ejector rod assembly, the electromagnet armature return stop block, the electromagnet armature return stop assembly and the electromagnet mounting plate form an integral structure through the base; the braking butterfly spring group and the gap adjusting sheet are respectively sleeved in a braking butterfly spring force adjusting rod and a wedge block directional rod which are vertical to the movable wedge block, the movable wedge block is sleeved in the machine base, the braking butterfly spring force adjusting rod and the movable wedge block directional rod penetrate through corresponding holes on the machine base and are fastened by bolts, the movable wedge guide plate is provided with an inner side guide plate and an outer side guide plate, the inner side guide plate is connected with the machine base into a whole, the outer side guide plate is locked on the base through a bolt, the electromagnet is installed on the electromagnet installation plate, the electromagnet installation plate is pre-locked on the inner side guide plate which is integrated with the base through the bolt, the idler wheel is installed between the inner side guide plate and the outer side guide plate, the electromagnet armature return stop block is arranged at one end of the electromagnet, the electromagnet armature return stop block assembly is arranged at the bottom of the electromagnet armature return stop block, and the electromagnet armature return stop block assembly is arranged on the electromagnet installation plate.
The two groups of symmetrical and independent brake units are symmetrically arranged at the positions of the guide shoes of the original car of the upper beam of the elevator car top, the gaps between the two roller surfaces and the elevator guide rails are adjusted to be uniform and then fastened, and then the guide shoes of the car are arranged above the elevator accidental movement amount control device with the buffer and gradable brake.
The movable wedge block can adopt a multi-angle inclined plane movable wedge block, the symmetrical surfaces of the multi-angle inclined plane movable wedge blocks are respectively provided with an inverted L-shaped wedge block, the angle of the last inclined plane is approximate to 90 degrees, the back surface of the inclined plane is provided with two vertical planes with unequal heights, and the vertical planes are provided with a vertical round rod.
The invention has the advantages of fundamentally overcoming the existing defects of the elevator, eliminating the accidental movement of the elevator car after the elevator stops running, realizing the graded braking of the elevator with buffer, controlling the elevator car accidental movement amount after the elevator stops running, meeting the national technical requirements on the elevator, and further eliminating the occurrence of high-frequency accidents of the elevator in use.
Drawings
Fig. 1 is a schematic structural composition diagram of an embodiment of the present invention.
Fig. 2 is a side view of the structure of fig. 1.
Fig. 3 is an electrical control schematic diagram of an embodiment of the present invention.
Detailed Description
The following examples will further illustrate the present invention with reference to the accompanying drawings.
Referring to fig. 1-3, the embodiment of the invention comprises two groups of symmetrical independent brake units, wherein the two groups of symmetrical independent brake units respectively control the accidental movement of the elevator car up and down; each group of brake units is provided with a roller 1, a movable wedge block 6, a brake butterfly spring group 2, a brake butterfly spring force adjusting rod 3, a movable wedge block directional rod 4, a gap adjusting sheet 5, a movable wedge block guide plate 7, a machine base 9, a roller ejector rod assembly 8, an electromagnet 10, an electromagnet armature return stop block 11, an electromagnet armature return stop assembly 12 and an electromagnet mounting plate 13.
The roller 1, the movable wedge block 6, the brake butterfly spring group 2, the brake butterfly spring force adjusting rod 3, the movable wedge block orientation rod 4, the gap adjusting sheet 5, the movable wedge block guide plate 7, the roller ejector rod assembly 8, the electromagnet 10, the electromagnet armature return stop block 11, the electromagnet armature return stop assembly 12 and the electromagnet mounting plate 13 form an integral structure through the base 9; the braking butterfly spring group 2 and the clearance adjusting sheet 5 are respectively sleeved in a braking butterfly spring force adjusting rod 3 and a wedge block directional rod 4 which are vertical to a movable wedge block 6, the movable wedge block 6 is sleeved in a base 9, the braking butterfly spring force adjusting rod 3 and the movable wedge block directional rod 4 penetrate through corresponding holes on the base 9 and are fastened by bolts A, the movable wedge block guide plate 7 is provided with an inner side guide plate and an outer side guide plate, the inner side guide plate is connected with the base 9 into a whole, the outer side guide plate is locked on the base 9 through bolts, an electromagnet 10 is installed on an electromagnet installing plate 13, the electromagnet installing plate 13 is locked on the inner side guide plate which is integrated with the base 9 through bolts in advance, a roller 1 is installed between the inner side guide plate and the outer side guide plate, an electromagnet armature return stop block 11 is arranged at one end of the electromagnet 10, an electromagnet armature return stop component 12 is arranged at the bottom of the electromagnet armature return stop block 11, the electromagnet armature return stop component 12 is arranged on the electromagnet mounting plate 13.
The two groups of symmetrical and independent brake units are symmetrically arranged at the positions of the guide shoes of the original car of the upper beam of the elevator car top, the gaps between the two roller surfaces and the elevator guide rails are adjusted to be uniform and then fastened, and then the guide shoes of the car are arranged above the elevator accidental movement amount control device with the buffer and gradable brake.
The movable wedge 6 can adopt a multi-angle inclined plane movable wedge, the symmetrical surfaces of the multi-angle inclined plane movable wedge are respectively provided with an inverted L-shaped wedge, the angle of the last inclined plane is approximate to 90 degrees, the back surface of the inclined plane is provided with two vertical planes with unequal heights, and the vertical planes are provided with a vertical round rod.
The up or down action of the electromagnet is controlled by an upper contact or a lower contact of an upper accidental movement relay KMS and a lower accidental movement relay KMX, and the up or down action signals of the upper accidental movement relay KMS and the lower accidental movement relay KMX are given by the following control signals in series: an elevator stop signal K1, a maintenance off signal KMJ, a door opening signal KMM, an upper car accidental movement signal KSK, and a lower car accidental movement signal KXK. When the electromagnet (up or down) acts, the electromagnet armature is recovered backwards and separated from the roller shaft hole through the electromagnet action position signals K41 and K42. Free fall of the roller for an up-ward movement; in contrast, in the case of the roller jack assembly for the downward accidental movement, the roller 1 is tightly pressed between the car guide rail surface 14 and the movable wedge 6, the tangential force generated between the tangent line of the roller surface and the guide rail surface rotates the roller, and the generated torque first acts on the first slope of the movable wedge to press the disc spring so that the movable wedge is buffered and accommodated to the clearance between the clearance removal and the clearance adjustment piece. When the roller rotates to the second inclined surface, a rigid extrusion braking car is formed. Once the extrusion force exceeds the design value, the roller falls into the third vertical inclined surface, so that the extrusion force is limited within a range smaller than the design value, and the car is prevented from being subjected to excessive impact. After the electromagnet acts in place, a deflector rod on the armature iron pushes an electromagnet action switch open to cut off an electromagnet power supply loop and an elevator safety loop (see an electrical control schematic diagram in fig. 3 for details). Meanwhile, a return stop block on the armature is separated from a convex block of the return stop component of the armature of the electromagnet, and the convex block bounces the return after the armature acts.
The invention resets after action, selects emergency electric operation or maintenance operation after short circuit of the safety loop in the elevator machine room, and operates the elevator to move in a reverse inching way along the accidental movement of the elevator car until the roller is released (because the elastic force of the disc spring is gradually released to maintain the clamping force of the roller between the movable wedge block and the car guide rail, the roller moves along with the elevator car and moves to the position near the triggering position of the roller). And the armature slowly returns until the armature is inserted into the roller shaft hole and the return stop block presses the bump again, the electromagnet is pulled out to actuate the switch contact rod, and the switch is switched on.
When the elevator selects the maintenance state to operate, the maintenance disconnection switch acts to cut off the control loop of the invention.
In fig. 3, reference VCC is a power supply, YAS1 and YAS2 are upper anti-slip electromagnets, and YAX1 and YAX2 are lower anti-slip electromagnets.
The car accidental movement signal can be given by two upper and lower movement amount control sensors arranged in a well, the upper and lower sensors are arranged on the top of an elevator car, the mounting positions of the sensors are respectively at the positions with the edge distance of a leveling induction plate in the original well of the elevator being about 100-150 mm when the elevator is leveled, and the leveling induction plate is used for triggering the movement of the sensors, so that the accidental movement amount of the elevator is controlled between 200-450 mm.
The signal for controlling the accidental movement of the car can be obtained by an elevator encoder. The car door can be set to give a car door opening signal after the car door is opened for a certain gap through adjustment; when the elevator is in a maintenance running state, the elevator system is invalid; the control of the electromagnet action can be realized by an intermediate relay or a microcomputer logic programming mode; the elevator car up-running overspeed electric signal can be accessed to increase the elevator car up-running overspeed protection function. When the elevator car moves unexpectedly due to the falling or failure of braking force of the elevator brake, the elevator car can be stopped by controlling the movement amount before the elevator enters a high-speed or overspeed state; when the elevator traction capacity is reduced or fails to cause the accidental movement of the elevator car, the elevator car can be stopped by controlling the movement amount before the elevator enters a high-speed or overspeed state.
Claims (4)
1. The elevator accidental movement control device with the buffer gradable brake is characterized by consisting of two groups of symmetrical and independent brake units, wherein the two groups of symmetrical and independent brake units respectively control the accidental movement of the elevator car up and down; each group of brake units is provided with a roller, a movable wedge block, a brake butterfly spring group, a brake butterfly spring force adjusting rod, a movable wedge block orientation rod, a gap adjusting sheet, a movable wedge block guide plate, a base, a roller ejector rod assembly, an electromagnet armature return stop block, an electromagnet armature return stop assembly and an electromagnet mounting plate;
the roller, the movable wedge block, the brake butterfly spring group, the brake butterfly spring force adjusting rod, the movable wedge block orientation rod, the gap adjusting sheet, the movable wedge block guide plate, the roller ejector rod assembly, the electromagnet armature return stop block, the electromagnet armature return stop assembly and the electromagnet mounting plate form an integral structure through the base; the braking butterfly spring group and the gap adjusting sheet are respectively sleeved in a braking butterfly spring force adjusting rod and a movable wedge block directional rod which are vertical to the movable wedge block, the movable wedge block is sleeved in the machine base, the braking butterfly spring force adjusting rod and the movable wedge block directional rod penetrate through corresponding holes on the machine base and are fastened by bolts, the movable wedge block guide plate is provided with an inner side guide plate and an outer side guide plate, the inner side guide plate is connected with the machine base into a whole, the outer side guide plate is locked on the base through a bolt, the electromagnet is installed on the electromagnet installation plate, the electromagnet installation plate is pre-locked on the inner side guide plate which is integrated with the base through the bolt, the idler wheel is installed between the inner side guide plate and the outer side guide plate, the electromagnet armature return stop block is arranged at one end of the electromagnet, the electromagnet armature return stop block assembly is arranged at the bottom of the electromagnet armature return stop block, and the electromagnet armature return stop block assembly is arranged on the electromagnet installation plate.
2. The elevator accidental movement control device with the buffer gradable brake function as claimed in claim 1, wherein the two groups of symmetrical independent brake units are symmetrically arranged at the position of an original car guide shoe of an upper beam of an elevator car top, the gap between two roller surfaces and an elevator guide rail is adjusted to be uniform and then fastened, and then the car guide shoe is arranged above the elevator accidental movement control device with the buffer gradable brake function.
3. The apparatus for controlling the amount of unexpected movement of an elevator with a buffered graduated braking as set forth in claim 1, wherein the movable wedge is a multi-angle inclined movable wedge.
4. The apparatus for controlling the amount of unexpected movement of an elevator with a buffering and gradable braking function as claimed in claim 3, wherein the symmetrical surfaces of the multi-angle inclined movable wedge each have a reverse "L" -shaped wedge, wherein the angle of the last inclined surface is 90 °, and the back surface of the inclined surface has two vertical surfaces of unequal height, on which a vertical round bar is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710148036.8A CN107055253B (en) | 2017-03-14 | 2017-03-14 | Elevator accidental movement amount control device with buffer gradable braking function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710148036.8A CN107055253B (en) | 2017-03-14 | 2017-03-14 | Elevator accidental movement amount control device with buffer gradable braking function |
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| Publication Number | Publication Date |
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| CN107055253A CN107055253A (en) | 2017-08-18 |
| CN107055253B true CN107055253B (en) | 2022-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710148036.8A Active CN107055253B (en) | 2017-03-14 | 2017-03-14 | Elevator accidental movement amount control device with buffer gradable braking function |
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| JP2007302450A (en) * | 2006-05-15 | 2007-11-22 | Hitachi Ltd | Emergency stop device for elevator, and elevator |
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| CN102219140A (en) * | 2010-04-16 | 2011-10-19 | 株式会社日立制作所 | Emergency brake device and elevator using the emergency brake device |
| CN103224178A (en) * | 2013-04-02 | 2013-07-31 | 杭州沪宁电梯配件有限公司 | Instantaneous type safety gear for elevator |
| CN103991769A (en) * | 2014-05-28 | 2014-08-20 | 六安市鸿兴精密机械有限公司 | Falling prevention device |
| CN104326325A (en) * | 2014-10-22 | 2015-02-04 | 厦门升通电梯有限公司 | Traction type elevator slip limiting device |
| CN105173963A (en) * | 2015-08-10 | 2015-12-23 | 厦门升通电梯有限公司 | Elevator car accidental movement control device |
| CN205114752U (en) * | 2015-12-03 | 2016-03-30 | 浙江屹立电梯有限公司 | Gradual elevator safety tongs of self -balancing |
| CN106032235A (en) * | 2015-03-13 | 2016-10-19 | 株式会社日立制作所 | Elevator device and safety gear device |
| CN206606885U (en) * | 2017-03-14 | 2017-11-03 | 厦门升通电梯有限公司 | A kind of band buffers the elevator accidental movement amount control device of gradable braking |
-
2017
- 2017-03-14 CN CN201710148036.8A patent/CN107055253B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007302450A (en) * | 2006-05-15 | 2007-11-22 | Hitachi Ltd | Emergency stop device for elevator, and elevator |
| CN101549818A (en) * | 2008-04-01 | 2009-10-07 | 上海三菱电梯有限公司 | Elevator brake |
| CN102219140A (en) * | 2010-04-16 | 2011-10-19 | 株式会社日立制作所 | Emergency brake device and elevator using the emergency brake device |
| CN103224178A (en) * | 2013-04-02 | 2013-07-31 | 杭州沪宁电梯配件有限公司 | Instantaneous type safety gear for elevator |
| CN103991769A (en) * | 2014-05-28 | 2014-08-20 | 六安市鸿兴精密机械有限公司 | Falling prevention device |
| CN104326325A (en) * | 2014-10-22 | 2015-02-04 | 厦门升通电梯有限公司 | Traction type elevator slip limiting device |
| CN106032235A (en) * | 2015-03-13 | 2016-10-19 | 株式会社日立制作所 | Elevator device and safety gear device |
| CN105173963A (en) * | 2015-08-10 | 2015-12-23 | 厦门升通电梯有限公司 | Elevator car accidental movement control device |
| CN205114752U (en) * | 2015-12-03 | 2016-03-30 | 浙江屹立电梯有限公司 | Gradual elevator safety tongs of self -balancing |
| CN206606885U (en) * | 2017-03-14 | 2017-11-03 | 厦门升通电梯有限公司 | A kind of band buffers the elevator accidental movement amount control device of gradable braking |
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| CN107055253A (en) | 2017-08-18 |
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