CN109704168B - Integrated elevator speed limiting protection device and elevator with same - Google Patents
Integrated elevator speed limiting protection device and elevator with same Download PDFInfo
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- CN109704168B CN109704168B CN201910141895.3A CN201910141895A CN109704168B CN 109704168 B CN109704168 B CN 109704168B CN 201910141895 A CN201910141895 A CN 201910141895A CN 109704168 B CN109704168 B CN 109704168B
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Abstract
The invention discloses an integrated elevator speed limiting protection device and an elevator with the same, comprising: a one-way fixed-displacement hydraulic pump having a drive end, a hydraulic pump input end, and a hydraulic pump output end; the roller is in driving connection with the driving end; the input end of the normally open pressure valve is communicated with the output end of the hydraulic pump, and the output end of the normally open pressure valve is communicated with the oil tank; when the elevator normally operates, the one-way quantitative hydraulic pump and the normally open pressure valve form a normal oil path, so that oil flows back to the oil tank through the normally open pressure valve; a normally closed pressure valve in communication with the hydraulic pump output; a brake hydraulic cylinder in communication with the normally closed pressure valve; the safety tongs are in driving connection with the brake hydraulic cylinder; when the elevator goes down in overspeed, the unidirectional quantitative hydraulic pump, the normally closed pressure valve and the brake hydraulic cylinder are communicated to form a protection oil way, so that oil flows into the brake hydraulic cylinder to drive the safety tongs to work. The invention can protect the elevator car, ensure the lasting stability and stable braking of the emergency braking function of the elevator car, and improve the installation efficiency.
Description
Technical Field
The invention relates to the technical field of elevator safety protection devices, in particular to an integrated elevator speed limiting protection device and an elevator with the same.
Background
An elevator overspeed governor is a safety protection device for preventing overspeed operation of an elevator car, which is usually mounted on the elevator car, and which stops the elevator car when the elevator overspeed reaches a preset speed of the elevator overspeed governor, accompanied by movement of the elevator car.
In the elevator speed limiter in the prior art, a rope pulley is driven to move through a traction rope, and a pair of centrifugal hammers arranged on the rope pulley move along with the rope pulley under the state that the rope pulley is driven to move by the traction rope. When the elevator car is in the normal speed range and goes up or down, the centrifugal hammer is insufficient to strike the lock catch, and the lock catch locks the ratchet wheel, so that the ratchet wheel does not move along with the rope wheel, and further, the safety gear is not acted; on the contrary, when the elevator car runs at overspeed, the speed of the rope pulley is correspondingly increased, the centrifugal force of the centrifugal hammer is increased, the amplitude of the outer throwing is obviously increased and impacts the lock catch, the lock catch releases the locking of the ratchet wheel, the ratchet wheel moves along with the rope pulley, and the safety gear is enabled to act by a steel wire rope or a lifting rod connected between the ratchet wheel and the safety gear, so that the elevator car is locked on a guide rail of a hoistway wall.
However, the condition of swaying and swaying can exist in the use process of the traction rope, and the traction rope frequently whips the outer wall of the elevator car, so that the elevator car is easy to damage, and the matching effect of the traction rope and the rope wheel can be influenced. In addition, as the durability of the matching effect between the traction rope and the rope pulley is difficult to ensure, when the traction rope stretches or contracts, the friction force between the traction rope and the rope pulley is changed, so that the movement speed of the rope pulley is not enough to be permanently maintained at the expected design degree, the movement stability of the rope pulley can influence the movement of the centrifugal hammer, and further the instant braking of the safety tongs is correspondingly influenced; and the elevator overspeed governor still needs overspeed device tensioner to control wire rope's tensioning force, and overspeed device tensioner still influences the well when taking up well space and arranges, leads to elevator overspeed device tensioner, and wire rope's location installation effectiveness is lower, influences the installation rate of elevator.
Disclosure of Invention
The invention aims to provide an integrated elevator speed limiting protection device which can protect an elevator car, ensure the lasting, stable and stable braking of an emergency braking function of the elevator car and improve the installation efficiency.
In order to achieve the above object, the technical scheme of the present invention is as follows:
an integrated elevator speed limit protection device, comprising:
a one-way fixed-displacement hydraulic pump having a drive end, a hydraulic pump input end, and a hydraulic pump output end;
a roller moving along the hoistway guide rail and in driving connection with the driving end;
the oil tank is connected with the input end of the hydraulic pump;
the input end of the normally open pressure valve is communicated with the output end of the hydraulic pump, and the output end of the normally open pressure valve is communicated with the oil tank;
when the elevator normally operates, the one-way quantitative hydraulic pump and the normally open pressure valve form a normal oil way, so that oil flows back to the oil tank again through the normally open pressure valve;
a normally closed pressure valve in communication with the hydraulic pump output;
a brake hydraulic cylinder in communication with the normally closed pressure valve;
a safety clamp in driving connection with the brake hydraulic cylinder;
when the elevator goes down in overspeed, the one-way quantitative hydraulic pump, the normally closed pressure valve and the brake hydraulic cylinder are sequentially communicated to form a protection oil way, so that oil flows into the brake hydraulic cylinder to drive the safety tongs to work.
Further, the working oil pressure value of the normally open pressure valve is equal to the working oil pressure value of the normally closed pressure valve.
Further, when the elevator normally operates, the first output oil pressure of the output end of the hydraulic pump is lower than the working oil pressure values of the normally open pressure valve and the normally closed pressure valve, the normally open pressure valve is in an open state, and the normally closed pressure valve is in a closed state;
when the elevator goes down in overspeed, the second output oil pressure of the output end of the hydraulic pump is higher than the working oil pressure values of the normally-open pressure valve and the normally-closed pressure valve, the normally-open pressure valve is in a closed state, and the normally-closed pressure valve is in an open state.
Further, the hoistway guide rail includes: a first hoistway guide rail disposed on the left side of the hoistway, and a second hoistway guide rail disposed on the right side of the hoistway;
the safety gear includes: a first safety gear moving along the first hoistway rail, and a second safety gear moving along the second hoistway rail;
the brake hydraulic cylinder includes: a first brake hydraulic cylinder in driving connection with the first safety gear, and a second brake hydraulic cylinder in driving connection with the second safety gear.
Further, when the elevator is overspeed down, the second output oil pressure of the hydraulic pump output end is higher than the driving oil pressure values of the first brake hydraulic cylinder and the second brake hydraulic cylinder.
Further, the integrated elevator speed limiting protection device also comprises a one-way valve;
the protection oil path includes: a first oil segment, a second oil segment, and a third oil segment;
one end of the first oil section is communicated with the output end of the hydraulic pump, and the other end of the first oil section is communicated with the input end of the normally closed pressure valve;
one end of the second oil section is communicated with the output end of the normally closed pressure valve, and the other end of the second oil section is communicated with the input end of the one-way valve;
one end of the third oil section is communicated with the output end of the one-way valve, and the other end of the third oil section is communicated with the brake hydraulic cylinder.
Further, the integrated elevator speed limit protection device further comprises a manual hydraulic valve, the manual hydraulic valve comprises:
the manual hydraulic valve input end is communicated with the third oil path section;
the manual hydraulic valve output end is communicated with the oil tank;
when the safety tongs are reset, the input end of the manual hydraulic valve is communicated with the output end of the manual hydraulic valve.
It is yet another object of the present invention to provide an elevator comprising the above-described integrated elevator speed limit protection device.
Compared with the prior art, the invention has the following technical effects:
the invention relates to an integrated elevator speed limiting protection device, which directly drives a unidirectional quantitative hydraulic pump to work through rollers along a hoistway guide rail by eliminating parts of a traction rope and a steel wire rope, and immediately triggers a safety tongs to emergently brake an elevator in a mode of converting mechanical energy into pressure energy and then converting the pressure energy into mechanical energy. According to the invention, as the traction rope is omitted, the problem that the frequent shaking of the traction rope generates whipping on the outer wall of the elevator car in the use process of the traction rope is solved, the service life of the elevator car is prolonged, and meanwhile, the instant braking of the safety tongs is not influenced due to the change of the friction force between the traction rope and the rope wheel. The invention cancels the steel wire rope, then cancels the setting of the tensioning device, reduces the installation cost, improves the installation efficiency and further reduces the well space occupied by the invention.
For a better understanding and implementation, the present invention is described in detail below with reference to the drawings.
Drawings
Fig. 1 is a schematic diagram of an integrated elevator speed limit protection device and elevator of the present invention;
fig. 2 is a schematic view of an oil path of the integrated elevator speed limit protection device of the present invention when the elevator is operating normally;
fig. 3 is a schematic view of an oil path of the integrated elevator speed limit protection device of the present invention when the elevator is overspeed;
fig. 4 is a schematic view of an oil path when the safety gear of the integrated elevator speed limit protection device of the present invention is reset;
fig. 5 is a front view of the integrated elevator speed limit guard of the present invention connected to a hoistway rail;
fig. 6 is a side view of the integrated elevator speed limit guard of the present invention connected to a hoistway rail;
fig. 7 is a schematic view of safety gear of the integrated elevator speed limit protection device of the present invention during normal operation of the elevator;
fig. 8 is a schematic view of safety gear of the integrated elevator speed limit protection device of the present invention when the elevator is overspeed.
[ reference numerals ]
100 one-way quantitative hydraulic pump 110 driving end 120 hydraulic pump input end
130 hydraulic pump output
200 hoistway guide 210 first hoistway guide 220 second hoistway guide
300 roller
400 normally open pressure valve
500 normally closed pressure valve
600 brake cylinders 610 first brake cylinder 620 second brake cylinder
700 safety tongs 710 first safety tongs 720 second safety tongs
730 draw bar 740 wedge block
750 fixed block
800 one-way valve
900 Manual Hydraulic valve 910 Manual hydraulic valve input 920 Manual hydraulic valve output
1000 oil tank 1100 normal oil circuit 1200 protection oil circuit
1201 first oil path 1202 second oil path 1203 third oil path
Detailed Description
For a fuller understanding of the objects, features, and effects of the present invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.
The elevator speed limiter in the prior art drives the rope wheel to move through the traction rope, and then the centrifugal movement of the centrifugal hammer is utilized to trigger the safety tongs to work through the steel wire rope, so that the elevator car is locked on the guide rail of the well wall.
However, in the elevator speed limiter in the prior art, the traction rope can have a swaying condition in the use process, and the traction rope frequently whips the outer wall of the elevator car, so that the elevator car is easy to damage. Moreover, when the traction rope stretches or contracts, the friction force between the traction rope and the rope pulley changes, so that the movement speed of the rope pulley is not enough to be permanently maintained at the expected design degree, and the instant braking of the safety gear is correspondingly influenced. Besides, the elevator speed limiter further needs a tensioning device to control the tensioning force of the steel wire rope, the tensioning device occupies the space of a well and also affects the arrangement of the well, the elevator speed limiter is caused, the tensioning device is low in positioning and mounting efficiency of the steel wire rope, and the mounting speed of an elevator is affected.
In order to solve the above problems, the present invention provides an integrated elevator speed limit protection device, as shown in fig. 1, 2, 3, 5 and 6, comprising:
a one-way fixed displacement hydraulic pump 100 having a drive end 110, a hydraulic pump input 120, and a hydraulic pump output 130;
a roller 300 moving along the hoistway guide rail 200 and drivingly connected to the drive end 110;
a tank 1000 connected to the hydraulic pump input 120;
a normally open pressure valve 400 having an input end connected to the hydraulic pump output end 130 and an output end connected to the oil tank 1000;
when the elevator is operating normally, the one-way constant-volume hydraulic pump 100 and the normally open pressure valve 400 form a normal oil path 1100, so that the oil returns to the oil tank 1000 again through the normally open pressure valve 400;
a normally closed pressure valve 500 in communication with the hydraulic pump output 130;
a brake cylinder 600 in communication with the normally closed pressure valve 500;
a safety gear 700 drivingly connected to the brake cylinder 600;
when the elevator is in overspeed down, the unidirectional quantitative hydraulic pump 100, the normally closed pressure valve 500 and the brake hydraulic cylinder 600 are sequentially communicated to form a protection oil path 1200, so that oil flows into the brake hydraulic cylinder 600 to drive the safety gear 700 to work.
Specifically, as shown in fig. 1, 5 and 6, the integrated elevator speed limiting protection device is disposed on an elevator car, and a roller 300 contacts with a hoistway rail and moves along the length direction of the hoistway rail, wherein the roller is in driving connection with a driving end 110 of the unidirectional quantitative hydraulic pump 100, and when the roller rotates, the unidirectional quantitative hydraulic pump 100 is driven to work, so that an input end 120 of the hydraulic pump sucks oil in an oil tank 1000, and the oil with pressure energy is output to a normally open pressure valve 400 and a normally closed pressure valve 500 through an output end 130 of the hydraulic pump.
As shown in fig. 1 and 2, when the elevator is operating normally, the roller 300 rotates at a normal speed, the first output oil pressure of the hydraulic pump output end 130 is lower than the working oil pressure values of the normally open pressure valve 400 and the normally closed pressure valve 500, at this time, the normally open pressure valve 400 is in an open state, the normally closed pressure valve 500 is in a closed state, the unidirectional constant-pressure hydraulic pump 100 and the normally open pressure valve 400 form a normal oil path 1100, and the oil output from the hydraulic pump output end flows back to the oil tank again through the normally open pressure valve. Since the oil flows only in the normal oil path and does not enter the protection oil path, as shown in fig. 7, the wedge 740 of the safety clamp 700 does not clamp the hoistway guide rail 200, so that the elevator continues to operate normally.
As shown in fig. 1 and 3, when the elevator is in overspeed, the rotation speed of the roller 300 is increased, the hydraulic pump 100 compresses the oil to increase the pressure energy of the oil, the second output oil pressure of the hydraulic pump output end 130 is higher than the working oil pressure values of the normally open pressure valve 400 and the normally closed pressure valve 500, at this time, the normally open pressure valve 400 is in a closed state, the normally closed pressure valve 500 is in an open state, and the hydraulic pump 100, the normally closed pressure valve 500 and the brake cylinder 600 are sequentially communicated to form a protection oil path 1200, so that the oil flows into the brake cylinder 600 to drive the safety tongs 700 to work. The hydraulic fluid enters the brake hydraulic cylinder through the protection oil path as shown in fig. 3, the brake hydraulic cylinder lifts the pull rod 730, the brake hydraulic cylinder drives the wedge 740 to move upwards along the inclined plane of the fixed block 750 as shown in fig. 8, and when the wedge moves upwards, the distance between the wedge and the hoistway guide rail is narrowed, and the hoistway guide rail is clamped, so that the elevator is locked.
The integrated elevator speed limiting protection device disclosed by the invention can be used for carrying out emergency braking on an overspeed descending elevator in the mode, so that the safety of passengers in an elevator car is protected. Compared with the prior art, the invention omits the parts of the traction rope and the steel wire rope, directly drives the unidirectional quantitative hydraulic pump to work through the roller along the well guide rail, and immediately triggers the safety tongs to carry out emergency braking on the elevator in a mode of converting mechanical energy into pressure energy and then converting the pressure energy into mechanical energy. According to the invention, as the traction rope is omitted, the problem that the frequent shaking of the traction rope generates whipping on the outer wall of the elevator car in the use process of the traction rope is solved, the service life of the elevator car is prolonged, and meanwhile, the instant braking of the safety tongs is not influenced due to the change of the friction force between the traction rope and the rope wheel. The invention cancels the steel wire rope, then cancels the setting of the tensioning device, reduces the installation cost, improves the installation efficiency and further reduces the well space occupied by the invention.
In order to ensure that the integrated elevator speed limiting protection device can operate in time, the working oil pressure value of the normally open pressure valve 400 is equal to the working oil pressure value of the normally closed pressure valve 500, and when the second output oil pressure is higher than the working oil pressure value, the normally open pressure valve is immediately closed, so that oil directly flows into the normally closed pressure valve.
In order to ensure that the safety tongs 700 on both left and right sides can be lifted simultaneously, and ensure that the first safety tongs 710 and the second safety tongs 720 operate simultaneously, so that the elevator car is braked smoothly, the oil path pipeline and the oil pressure of the unidirectional quantitative hydraulic pump 100 of the integrated elevator speed limiting protection device reach the first brake hydraulic cylinder 610 and the second brake hydraulic cylinder 620 are the same.
As shown in fig. 1, 2, 3 and 4, the hoistway guide rail 200 further includes: a first hoistway rail 210 disposed on the left side of the hoistway, and a second hoistway rail 220 disposed on the right side of the hoistway;
the safety gear 700 includes: a first safety gear 710 moving along the first hoistway rail 210, and a second safety gear 720 moving along the second hoistway rail 220;
the brake cylinder 600 includes: the first brake hydraulic cylinder 610 in driving connection with the first safety gear 710 and the second brake hydraulic cylinder 620 in driving connection with the second safety gear 720 are arranged on the first hoistway guide rail on the left side of the hoistway, and the second brake hydraulic cylinder and the second safety gear are arranged on the second hoistway guide rail on the right side of the hoistway, so that the first safety gear and the second safety gear can synchronously carry out emergency braking on the left side and the right side of the elevator car, the left and the right movement of the elevator car are limited, and the elevator operation is more gentle and stable.
When the elevator is overspeed down, the second output oil pressure of the hydraulic pump output 130 is higher than the driving oil pressure values of the first brake cylinder 610 and the second brake cylinder 620, so that the first safety gear and the second safety gear are operated simultaneously.
Further, in order to ensure that the oil in the protection oil path does not flow back to the oil tank by closing the pressure valve frequently, as shown in fig. 3, the integrated elevator speed limiting protection device further comprises a one-way valve 800;
the protection oil path 1200 includes: a first oil path section 1201, a second oil path section 1202, and a third oil path section 1203;
one end of the first oil path section 1201 is communicated with the hydraulic pump output end 130, and the other end is communicated with the input end of the normally closed pressure valve 500;
one end of the second oil path section 1202 is communicated with the output end of the normally closed pressure valve 500, and the other end is communicated with the input end of the one-way valve 800;
one end of the third oil path section 1203 is communicated with the output end of the check valve 800, and the other end is communicated with the brake cylinder 600.
Preferably, in order to enable the integrated elevator speed limit protection device of the present invention to be recycled, the integrated elevator speed limit protection device further includes a manual hydraulic valve 900, the manual hydraulic valve 900 including:
a manual hydraulic valve input 910 in communication with the third oil path segment 1203;
a manual hydraulic valve output 920 in communication with the tank 1000;
under normal state, the manual hydraulic valve is in a closed state, and the input end of the manual hydraulic valve is not communicated with the output end of the manual hydraulic valve. When the elevator goes down in overspeed, the oil liquid can rapidly enter the brake hydraulic cylinder through the protection oil way, so that emergency braking is ensured.
When the safety tongs 700 are reset, the manual hydraulic valve is opened, and the manual hydraulic valve input end 910 is communicated with the manual hydraulic valve output end 920, so that the oil in the brake hydraulic cylinder flows back to the oil tank through the pipeline and the manual hydraulic valve, and the oil is recycled.
It is yet another object of the present invention to provide an elevator comprising the above-described integrated elevator speed limit protection device.
The present invention is not limited to the above-described embodiments, but, if various modifications or variations of the present invention are not departing from the spirit and scope of the present invention, the present invention is intended to include such modifications and variations as fall within the scope of the claims and the equivalents thereof.
Claims (7)
1. An integrated elevator speed limit protection device, comprising:
a one-way fixed-displacement hydraulic pump having a drive end, a hydraulic pump input end, and a hydraulic pump output end;
a roller moving along the hoistway guide rail and in driving connection with the driving end;
the oil tank is connected with the input end of the hydraulic pump;
the input end of the normally open pressure valve is communicated with the output end of the hydraulic pump, and the output end of the normally open pressure valve is communicated with the oil tank; when the elevator normally operates, the one-way quantitative hydraulic pump and the normally open pressure valve form a normal oil way, so that oil flows back to the oil tank again through the normally open pressure valve;
a normally closed pressure valve in communication with the hydraulic pump output;
a brake hydraulic cylinder in communication with the normally closed pressure valve;
a safety clamp in driving connection with the brake hydraulic cylinder;
when the elevator goes down at overspeed, the unidirectional quantitative hydraulic pump, the normally closed pressure valve and the brake hydraulic cylinder are sequentially communicated to form a protection oil way, so that oil flows into the brake hydraulic cylinder to drive the safety tongs to work;
the working oil pressure value of the normally open pressure valve is equal to the working oil pressure value of the normally closed pressure valve.
2. The integrated elevator speed limit protection device of claim 1, wherein:
when the elevator normally operates, the first output oil pressure of the output end of the hydraulic pump is lower than the working oil pressure values of the normally open pressure valve and the normally closed pressure valve, the normally open pressure valve is in an open state, and the normally closed pressure valve is in a closed state;
when the elevator goes down in overspeed, the second output oil pressure of the output end of the hydraulic pump is higher than the working oil pressure values of the normally-open pressure valve and the normally-closed pressure valve, the normally-open pressure valve is in a closed state, and the normally-closed pressure valve is in an open state.
3. The integrated elevator speed limit protection device of claim 1, wherein:
the hoistway guide rail includes: a first hoistway guide rail disposed on the left side of the hoistway, and a second hoistway guide rail disposed on the right side of the hoistway;
the safety gear includes: a first safety gear moving along the first hoistway rail, and a second safety gear moving along the second hoistway rail;
the brake hydraulic cylinder includes: a first brake hydraulic cylinder in driving connection with the first safety gear, and a second brake hydraulic cylinder in driving connection with the second safety gear.
4. The integrated elevator speed limit protection device of claim 3, wherein:
when the elevator is in overspeed down, the second output oil pressure of the output end of the hydraulic pump is higher than the driving oil pressure values of the first brake hydraulic cylinder and the second brake hydraulic cylinder.
5. The integrated elevator speed limit protection device of claim 1, wherein:
the integrated elevator speed limiting protection device further comprises a one-way valve;
the protection oil path includes: a first oil segment, a second oil segment, and a third oil segment;
one end of the first oil section is communicated with the output end of the hydraulic pump, and the other end of the first oil section is communicated with the input end of the normally closed pressure valve;
one end of the second oil section is communicated with the output end of the normally closed pressure valve, and the other end of the second oil section is communicated with the input end of the one-way valve;
one end of the third oil section is communicated with the output end of the one-way valve, and the other end of the third oil section is communicated with the brake hydraulic cylinder.
6. The integrated elevator speed limit protection device of claim 5, wherein:
the integrated elevator speed limiting protection device further comprises a manual hydraulic valve, wherein the manual hydraulic valve comprises:
the manual hydraulic valve input end is communicated with the third oil path section;
the manual hydraulic valve output end is communicated with the oil tank;
when the safety tongs are reset, the input end of the manual hydraulic valve is communicated with the output end of the manual hydraulic valve.
7. Elevator, characterized by comprising an integrated elevator speed limit protection according to any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910141895.3A CN109704168B (en) | 2019-02-26 | 2019-02-26 | Integrated elevator speed limiting protection device and elevator with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910141895.3A CN109704168B (en) | 2019-02-26 | 2019-02-26 | Integrated elevator speed limiting protection device and elevator with same |
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| CN109704168B true CN109704168B (en) | 2023-10-03 |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07247077A (en) * | 1994-03-08 | 1995-09-26 | Toshiba Corp | Safety device for elevator |
| DE602005008205D1 (en) * | 2005-05-09 | 2008-08-28 | Dynatech Dynamics & Technology | Safety catch for a gradual bidirectional safety device |
| CN102338000A (en) * | 2011-09-28 | 2012-02-01 | 刘孟波 | Fuel control device of dual-fuel automobile |
| CN102367129A (en) * | 2011-09-28 | 2012-03-07 | 快意电梯有限公司 | Combined type overspeed protective device for elevator |
| CN104787640A (en) * | 2015-05-19 | 2015-07-22 | 苏州多美适家用电梯有限公司 | Roller guide shoe triggered elevator speed limiter |
| CN105398908A (en) * | 2015-10-10 | 2016-03-16 | 穆洪彪 | Auxiliary control device of elevator safety tongs |
| CN105668362A (en) * | 2016-02-24 | 2016-06-15 | 李华敏 | Automatic decelerating and braking system for lift |
| CN106276472A (en) * | 2015-06-29 | 2017-01-04 | 东芝电梯株式会社 | Elevator speed detector and elevator |
| CN108046082A (en) * | 2017-12-12 | 2018-05-18 | 中国矿业大学 | Deep vertical large-tonnage hoisting container Multipoint synchronous braking system and its method of work |
| CN108083155A (en) * | 2017-12-25 | 2018-05-29 | 湖州戴斯电梯有限公司 | A kind of hydraulic self-adapting elevator traction sheave brake system |
| CN108217374A (en) * | 2016-12-13 | 2018-06-29 | 奥的斯电梯公司 | The speed detector of elevator or counterweight |
| CN209583320U (en) * | 2019-02-26 | 2019-11-05 | 广州广日电梯工业有限公司 | A kind of integral type elevator speed-limiting protective device and the elevator with the device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102275799B (en) * | 2011-07-08 | 2013-01-16 | 中国矿业大学 | Mine elevator |
-
2019
- 2019-02-26 CN CN201910141895.3A patent/CN109704168B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07247077A (en) * | 1994-03-08 | 1995-09-26 | Toshiba Corp | Safety device for elevator |
| DE602005008205D1 (en) * | 2005-05-09 | 2008-08-28 | Dynatech Dynamics & Technology | Safety catch for a gradual bidirectional safety device |
| CN102338000A (en) * | 2011-09-28 | 2012-02-01 | 刘孟波 | Fuel control device of dual-fuel automobile |
| CN102367129A (en) * | 2011-09-28 | 2012-03-07 | 快意电梯有限公司 | Combined type overspeed protective device for elevator |
| CN104787640A (en) * | 2015-05-19 | 2015-07-22 | 苏州多美适家用电梯有限公司 | Roller guide shoe triggered elevator speed limiter |
| CN106276472A (en) * | 2015-06-29 | 2017-01-04 | 东芝电梯株式会社 | Elevator speed detector and elevator |
| CN105398908A (en) * | 2015-10-10 | 2016-03-16 | 穆洪彪 | Auxiliary control device of elevator safety tongs |
| CN105668362A (en) * | 2016-02-24 | 2016-06-15 | 李华敏 | Automatic decelerating and braking system for lift |
| CN108217374A (en) * | 2016-12-13 | 2018-06-29 | 奥的斯电梯公司 | The speed detector of elevator or counterweight |
| CN108046082A (en) * | 2017-12-12 | 2018-05-18 | 中国矿业大学 | Deep vertical large-tonnage hoisting container Multipoint synchronous braking system and its method of work |
| CN108083155A (en) * | 2017-12-25 | 2018-05-29 | 湖州戴斯电梯有限公司 | A kind of hydraulic self-adapting elevator traction sheave brake system |
| CN209583320U (en) * | 2019-02-26 | 2019-11-05 | 广州广日电梯工业有限公司 | A kind of integral type elevator speed-limiting protective device and the elevator with the device |
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| CN109704168A (en) | 2019-05-03 |
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