CN108005968B - Emergency brake release system, control method and lifting system thereof - Google Patents
Emergency brake release system, control method and lifting system thereof Download PDFInfo
- Publication number
- CN108005968B CN108005968B CN201711252237.9A CN201711252237A CN108005968B CN 108005968 B CN108005968 B CN 108005968B CN 201711252237 A CN201711252237 A CN 201711252237A CN 108005968 B CN108005968 B CN 108005968B
- Authority
- CN
- China
- Prior art keywords
- emergency
- brake
- oil
- valve
- release system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
- B66D5/24—Operating devices
- B66D5/26—Operating devices pneumatic or hydraulic
- B66D5/28—Operating devices pneumatic or hydraulic specially adapted for winding gear, e.g. in mining hoists
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/002—Electrical failure
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses an emergency brake release system, which comprises a battery, a brake controller and an emergency hydraulic brake; the battery provides power for the emergency hydraulic brake; the brake controller issues a control signal to control the emergency hydraulic brake to work, so that the lifting mechanism releases the weight when the power is off. The invention also provides a control method of the emergency brake release system, which comprises the steps of system starting self-checking; starting an emergency brake release system; starting an emergency oil pump; emergency brake opening of the brake; the speed sensor detects the rotating speed of the lifting motor and uploads the rotating speed to the brake controller; the braking controller controls the proportional overflow valve to ensure the rotating speed of the lifting motor; if the rotating speed of the lifting motor is greater than the threshold value, the battery is immediately disconnected from the emergency brake release system, and the brake is used as a band-type brake. The invention also provides a lifting mechanism comprising the emergency brake release system and a control method. The invention can ensure that the lifting mechanism can safely, quickly and controllably release the weight when the system is powered off, and has simple structure, safety and reliability.
Description
Technical Field
The invention aims to provide an emergency brake release system, a control method and a lifting system thereof.
Background
Along with the development of national economy and technology and the improvement of living standard of people, electric energy becomes an indispensable secondary energy source in daily production and living of people, and brings endless convenience to the production and living of people.
The lifting mechanism is an important auxiliary mechanism in industrial production, and the existing lifting mechanism adopts an electric hydraulic control mode. The hydraulic disc brake is a device applied to the braking of the lifting mechanism, and reliably realizes the braking of the band-type brake on the lifting mechanism when the lifting mechanism is decelerated and stopped in the normal working process; in case of emergency, the brake can rapidly respond to brake the lifting mechanism; when the lifting mechanism stops working, the contracting brake can brake the lifting mechanism, so that the lifting mechanism does not act.
However, when a major fault occurs, such as a complete system outage of the hoisting mechanism, the hoisting mechanism will be directly locked at this time, and the suspended weight will hover in the air. For safety and maintenance purposes, the weight must be released to the ground or some safety platform in a short period of time. In the prior art, a common method is to manually apply pressure to a brake cylinder by using a manual pump carried by a brake hydraulic station, when the pressure in the cylinder reaches a certain value, a piston of the cylinder starts to compress a disc spring, so that the pressure applied by a brake shoe on a brake disc is reduced, and finally, the manual brake opening process is completed, and a heavy object is released to the ground or a safety platform. However, the method is uncontrollable, and the operator who needs to operate has a skilled skill, and the brake is slowly opened and closed for a plurality of times; the heavy objects can fall down quickly with little carelessness, so that the heavy objects and other equipment are damaged; moreover, the method requires too long time and does not meet the requirement of rapid fault repair.
Disclosure of Invention
The invention aims to provide an emergency brake release system capable of guaranteeing that a lifting mechanism can release heavy objects safely, quickly and controllably when the system is powered off.
It is a second object of the present invention to provide a control method of the emergency brake release system.
It is a further object of the present invention to provide a lifting system comprising the emergency brake release system and control method.
The emergency brake release system provided by the invention comprises a battery, a brake controller and an emergency hydraulic brake; the battery is connected with the emergency hydraulic brake and used for providing power for the emergency hydraulic brake when the system is powered off; the brake controller is connected with the emergency hydraulic brake and used for sending a control signal to control the emergency hydraulic brake to work, so that the lifting mechanism releases the weight when the lifting mechanism is powered off.
The emergency brake release system also comprises a charge and discharge manager; the charge and discharge manager is connected between the battery and the emergency hydraulic brake and is used for managing the charge and discharge process of the battery.
The emergency brake release system also comprises a speed sensor; the speed sensor is used for sampling the rotating speed of a lifting motor in the lifting mechanism controlled by the emergency brake release system and uploading the rotating speed information to the brake controller.
The emergency hydraulic brake comprises an oil tank (1), a main oil supply system and a single-acting oil cylinder (8), wherein the main oil supply system is connected between the oil tank and the single-acting oil cylinder, the main oil supply system is driven by a brake controller to supply oil to the single-acting oil cylinder for opening and releasing actions, the single-acting oil cylinder is controlled to be closed by a brake closing spring, the brake further comprises a proportional overflow valve and an emergency oil supply system, the emergency oil supply system and the main oil supply system are powered by different power supplies, one end of the emergency oil supply system is connected with the oil tank, one end of the emergency oil supply system is connected with an oil path between the main oil supply system and the single-acting oil cylinder in series through a two-position three-way electromagnetic valve, the proportional overflow valve is connected with the oil path between the emergency oil supply system and the two-position three-way electromagnetic valve in parallel, the emergency oil supply system is driven by the brake controller to supply oil to the single-acting oil cylinder for opening and releasing actions when the main oil supply system is powered off, and the proportional overflow valve is regulated and controlled by the brake controller to supply oil to the single-acting oil cylinder stably. The single-acting oil cylinder is connected with a brake of the lifting mechanism and used for controlling the brake opening and the brake contracting of the brake.
The main oil supply system comprises a main oil pump (2), a main motor (3), two electromagnetic reversing valves (4, 5), two pressure relays (6, 7) and an energy accumulator (9), the emergency oil supply system comprises an emergency oil pump (11) and an emergency motor (12), the main motor and the emergency motor are powered by different power supplies, the main motor drives the main oil pump to pump oil in an oil tank, an oil path of the main oil pump is connected with a single-acting oil cylinder through a first electromagnetic reversing valve and a two-position three-way electromagnetic valve, the second electromagnetic reversing valve and the second pressure relay are connected in parallel with the oil path between the first electromagnetic reversing valve and the two-position three-way electromagnetic valve, and the first pressure relay and the energy accumulator are connected in parallel with the oil path between the main oil pump and the first electromagnetic reversing valve; the emergency motor drives the emergency oil pump to pump oil in the oil tank, an oil path of the emergency oil pump is connected with the two-position three-way electromagnetic valve, and the proportional overflow valve is connected in parallel with the oil path between the emergency oil pump and the two-position three-way electromagnetic valve; and the brake controller controls the operation of each motor and the power on or power off of the electromagnet of the electromagnetic valve.
And a manual pump (14) is connected in parallel on an oil path between the first electromagnetic reversing valve and the two-position three-way electromagnetic valve.
And filters (15) are arranged at oil suction ports of the main oil pump, the emergency oil pump and the manual pump.
And the oil outlets of the main oil pump, the emergency oil pump and the manual pump are respectively provided with a check valve.
And overflow valves are connected in parallel between the main oil pump and the check valve and between the emergency oil pump and the check valve.
Pressure gauges are connected in parallel between the one-way valve and the first electromagnetic reversing valve and between the one-way valve and the two-position three-way electromagnetic valve.
The single-acting oil cylinder is provided with a spring compression detector (18) which is used for monitoring the compression amount of the closing spring and sending a signal for adjusting the proportional overflow valve to the brake controller.
The invention also provides a control method of the emergency brake release system, which comprises the following steps:
s1, starting a system and performing self-detection;
s2, when a power supply of the lifting mechanism is powered off, starting an emergency brake release system;
s3, when the emergency brake release system is started, the emergency motor is started, so that an emergency oil pump works to inject oil into a rod cavity of the single-acting oil cylinder;
s4, the pressure in a rod cavity of the single-acting oil cylinder rises until a brake of the lifting mechanism is opened in an emergency;
s5, detecting the rotating speed of a lifting motor of the lifting mechanism in real time by a speed sensor, and uploading detected rotating speed information to a brake controller;
s6, the brake controller issues a control instruction to the proportional overflow valve according to the uploaded rotating speed information of the lifting motor, and the rotating speed of the lifting motor is ensured to work in a set rotating speed range by controlling the action pressure of the proportional overflow valve;
s7, if the brake controller detects that the rotating speed of the lifting motor is greater than a set threshold value, the brake controller issues a control instruction to the charge-discharge manager, the charge-discharge manager immediately disconnects the battery from the emergency brake release system, and at the moment, the brake of the lifting mechanism is braked, so that the safety of the lifting mechanism is ensured.
The invention also provides a lifting system which comprises the emergency brake release system and a control method thereof.
According to the emergency brake release system and the control method thereof, provided by the invention, by adding a set of power supply, an emergency motor and an emergency oil pump, an existing oil supply pipeline and an emergency oil supply pipeline are respectively connected with a single-acting oil cylinder by utilizing a two-position three-way electromagnetic valve, when the main power supply is powered off and the opening action of the single-acting oil cylinder can not be continued, a user can automatically start the added power supply to supply power, and the emergency oil pump continuously supplies oil to the single-acting oil cylinder through the two-position three-way electromagnetic valve to maintain pressure and open the valve, so that the working flow of the whole machine is smooth; the hydraulic control system has the advantages that the proportional overflow valve is connected between the emergency oil pump and the two-position three-way electromagnetic valve in parallel, the oil pressure flowing into the single-acting oil cylinder from the emergency oil pump is effectively controlled through the real-time adjustment of the proportional overflow valve, slow floating-paste type brake opening can be effectively realized, and the stability and the duration of brake opening work are ensured; finally, the invention has simple structure, can ensure continuous and stable opening when the main motor of the normally closed brake is in the power-off condition, can ensure the safe, rapid and controllable release of the heavy object by the lifting mechanism when the system is in power-off condition, and reduces the occurrence probability of accidents.
Drawings
Fig. 1 is a functional block diagram of an emergency brake release system of the present invention.
Fig. 2 is a schematic hydraulic principle view of the emergency hydraulic brake of the present invention.
Fig. 3 is a schematic diagram of the emergency hydraulic brake of the present invention in the energy storage and pressure maintaining.
Fig. 4 is a schematic diagram of the emergency hydraulic brake of the present invention in normal brake opening.
Fig. 5 is a schematic diagram of the emergency hydraulic brake of the present invention in an emergency brake release.
Fig. 6 is a flow chart of the control method of the present invention.
Detailed Description
A functional block diagram of the emergency brake release system of the present invention is shown in fig. 1: the emergency brake release system provided by the invention comprises a battery, a brake controller, an emergency hydraulic brake, a charge-discharge manager and a speed sensor; the battery is connected with the emergency hydraulic brake and used for providing power for the emergency hydraulic brake when the system is powered off; the brake controller is connected with the emergency hydraulic brake and used for sending a control signal to control the emergency hydraulic brake to work, so that the lifting mechanism releases the weight when the lifting mechanism is powered off; the charge and discharge manager is connected between the battery and the emergency hydraulic brake and is used for managing the charge and discharge process of the battery; the speed sensor is used for sampling the rotating speed of a lifting motor in the lifting mechanism controlled by the emergency brake release system and uploading the rotating speed information to the brake controller.
Fig. 2 is a schematic hydraulic schematic diagram of the emergency hydraulic brake according to the present invention: the labels shown in the figures and the corresponding component names are: 1. an oil tank; 2. a main oil pump; 3. a main motor; 4. 5 are respectively a first electromagnetic directional valve and a second electromagnetic directional valve; 6. 7 are respectively a first pressure relay and a second pressure relay; 8. a single-acting oil cylinder; 9. an accumulator; 10. a two-position three-way electromagnetic valve; 11. an emergency oil pump; 12. an emergency motor; 13. a proportional overflow valve; 14. a manual pump; 15. a filter; 16. an overflow valve; 17. a pressure gauge; 18. a spring compression detector; 81. closing spring
As can be seen from fig. 2, the novel safety emergency hydraulic brake comprises an oil tank 1, a main oil supply system, a single-acting oil cylinder 8, a two-position three-way electromagnetic valve 10, an emergency oil supply system, a proportional overflow valve 13, a spring compression amount detector 18 and a brake controller, wherein the main oil supply system comprises a main oil pump 2, a main motor 3, a normally-open first electromagnetic directional valve 4, a normally-open second electromagnetic directional valve 5, a first pressure relay 6, a second pressure relay 7 and an energy accumulator 9, the emergency oil supply system comprises an emergency oil pump 11 and an emergency motor 12, and a closing spring 81 for closing and clamping is arranged in a rodless cavity of the single-acting oil cylinder 8;
the oil suction ports of the main oil pump 2 and the emergency oil pump 11 are connected with the oil tank 1; the main motor 3 and the emergency motor 12 are powered by different power sources; the main motor 3 is electrically connected with the main oil pump 2 and is used for driving the main oil pump 2 to pump the oil in the oil tank 1; the emergency motor 12 is electrically connected with the emergency oil pump 11 and is used for driving the emergency oil pump 11 to pump oil in the oil tank 1; an oil way of an oil outlet of the main oil pump 2 is respectively connected with an A port of the first electromagnetic directional valve 4, the first pressure relay 6 and the energy accumulator 9 in parallel through a one-way valve, an oil way of a B port of the first electromagnetic directional valve 4 is respectively connected with an A port of the second electromagnetic directional valve 5, an A port of the two-position three-way electromagnetic valve 10 and the second pressure relay 7 in parallel, and a B port of the second electromagnetic directional valve 5 is connected with the oil tank 1; the oil way of the oil outlet of the emergency oil pump 11 is respectively connected with a proportional overflow valve 13 and the port B of the two-position three-way electromagnetic valve 10 through a one-way valve, and the port C of the two-position three-way electromagnetic valve 10 is connected with a rod cavity of the single-acting oil cylinder 8; the first pressure relay 6 is used for monitoring the real-time oil pressure of the accumulator 9 and sending a feedback signal to the brake controller, the second pressure relay 7 is used for monitoring the real-time oil pressure flowing into the single-acting oil cylinder 8 and sending a feedback signal to the brake controller, and the spring compression detector 18 is arranged on the single-acting oil cylinder 8 and used for monitoring the compression of the closing spring 81 and sending a signal for adjusting the proportional overflow valve 13 to the controller, and the brake controller controls the operation of each motor, the power-on or power-off of the electromagnet of the electromagnetic valve.
As can be seen from fig. 2, the emergency hydraulic brake of the invention further comprises a manual pump 14, a plurality of filters 15, a plurality of overflow valves and a plurality of pressure gauges, wherein the oil suction ports of the manual pump 14 are connected with the oil tank 1, and the oil way of the oil outlet of the manual pump 14 is communicated with the oil way between the port B of the first electromagnetic directional valve 4 and the port A of the second electromagnetic directional valve 5 through a one-way valve; the filters 15 are respectively arranged at the oil suction ports of the main oil pump 2, the emergency oil pump 11 and the manual pump 14 and are used for filtering hydraulic oil so as to ensure the cleanliness of the hydraulic oil entering the whole brake; the inlet oil way of the overflow valve 16 is connected in parallel with the oil way between the main oil pump 2 and the one-way valve and between the emergency oil pump 11 and the one-way valve, and the outlet oil way of the overflow valve 16 is connected with the oil tank 1; the pressure gauge 18 is connected in parallel with the oil path between the check valve and the A port of the first electromagnetic directional valve 4 and between the check valve and the B port of the two-position three-way electromagnetic valve 10.
The action process of the invention is as follows:
1. as shown in fig. 3, in the normal closing process of the invention, the main motor 3 is started, the brake controller controls the electromagnet of the first electromagnetic directional valve 4 to be electrified, so that the port A and the port B of the electromagnetic directional valve are disconnected, and the main oil pump 2 supplies oil to the energy accumulator 9; when the action pressure set by the first pressure relay 6 is reached, the first pressure relay 6 sends out a signal, the brake controller controls the main motor 3 to stop running, and the brake is in an energy storage and pressure maintaining state.
2. As shown in fig. 4, in the normal switching-on process, the brake controller controls the electromagnet of the first electromagnetic directional valve 4 to be powered off, the electromagnet of the second electromagnetic directional valve 5 to be powered on, the electromagnet of the two-position three-way electromagnetic valve 10 to be powered off, the port A and the port B of the second electromagnetic directional valve 5 are disconnected, and the passage between the rod cavity of the single-acting oil cylinder 8 and the oil tank 1 is closed; simultaneously, the port A and the port B of the first electromagnetic reversing valve 4 are communicated, the port A and the port C of the two-position three-way electromagnetic valve 10 are communicated, high-pressure hydraulic oil flows from the accumulator 9 to the rod cavity of the single-acting oil cylinder 8, the brake rapidly executes brake release action, and the second pressure relay 7 sends a brake release signal to a user system; when the pressure of the hydraulic oil flowing from the accumulator 9 to the rod cavity of the single-acting oil cylinder 8 is reduced to the action pressure set by the second pressure relay 7, the second pressure relay 7 sends out a signal, and the brake controller controls the main motor 3 to operate by itself to supplement the pressure.
3. As shown in fig. 5, in the emergency opening process (for example, when the system is suddenly powered off), the main motor 3 is powered off, the brake controller controls the emergency motor 12 to start, the electromagnet of the two-position three-way electromagnetic valve 10 is powered on, the port B and the port C of the two-position three-way electromagnetic valve 10 are communicated, and the emergency oil pump 11 supplies oil and maintains pressure to the rod cavity of the single-acting oil cylinder 8 according to the action pressure set by the proportional overflow valve 13, so that the emergency opening of the brake is ensured; in the process of opening and releasing the brake, the spring compression amount detector 18 monitors the compression amount of the brake closing spring 81 at all times and sends the monitored data to the brake controller, and the brake controller adjusts the action pressure of the proportional overflow valve 13 at all times according to the data monitored by the spring compression amount detector 18, so that the emergency brake opening force and stability are ensured.
As shown in fig. 6, the control method of the emergency brake release system provided by the invention comprises the following steps:
s1, starting a system and performing self-detection;
s2, when a power supply of the lifting mechanism is powered off, starting an emergency brake release system;
s3, when the emergency brake release system is started, the emergency motor is started, so that an emergency oil pump works to inject oil into a rod cavity of the single-acting oil cylinder;
s4, the pressure in a rod cavity of the single-acting oil cylinder rises until a brake of the lifting mechanism is opened in an emergency;
s5, detecting the rotating speed of a lifting motor of the lifting mechanism in real time by a speed sensor, and uploading detected rotating speed information to a brake controller;
s6, the brake controller issues a control instruction to the proportional overflow valve according to the uploaded rotating speed information of the lifting motor, and the rotating speed of the lifting motor is ensured to work in a set rotating speed range by controlling the action pressure of the proportional overflow valve;
s7, if the brake controller detects that the rotating speed of the lifting motor is greater than a set threshold value, the brake controller issues a control instruction to the charge-discharge manager, the charge-discharge manager immediately disconnects the battery from the emergency brake release system, and at the moment, the brake of the lifting mechanism is braked, so that the safety of the lifting mechanism is ensured.
The emergency brake release system and the control method thereof provided by the invention can be used for any other equipment needing lifting operation, including bridge cranes, gantry cranes, gate cranes, quay crane cranes, mine hoists, metallurgical cranes, container cranes, grab bucket cranes, garbage cranes, electromagnetic cranes, tower cranes, windlass, belt tensioners, well drilling hoists and the like.
Claims (7)
1. An emergency brake release system is characterized by comprising a battery, a brake controller and an emergency hydraulic brake; the battery is connected with the emergency hydraulic brake and used for providing power for the emergency hydraulic brake when the system is powered off; the brake controller is connected with the emergency hydraulic brake and used for sending a control signal to control the emergency hydraulic brake to work, so that the lifting mechanism releases the weight when the lifting mechanism is powered off;
the emergency hydraulic brake comprises an oil tank (1), a main oil supply system and a single-acting oil cylinder (8), wherein the main oil supply system is connected between the oil tank and the single-acting oil cylinder, the main oil supply system is driven by a brake controller to supply oil to the single-acting oil cylinder for opening and releasing actions, the single-acting oil cylinder is controlled to be closed by a brake closing spring, the brake further comprises a proportional overflow valve and an emergency oil supply system, the emergency oil supply system and the main oil supply system are powered by different power supplies, one end of the emergency oil supply system is connected with the oil tank, one end of the emergency oil supply system is connected with an oil path between the main oil supply system and the single-acting oil cylinder in series through a two-position three-way electromagnetic valve, the proportional overflow valve is connected with the oil path between the emergency oil supply system and the two-position three-way electromagnetic valve in parallel, the emergency oil supply system is driven by the brake controller to supply oil to the single-acting oil cylinder for opening and releasing actions when the main oil supply system is powered off, and the proportional overflow valve is regulated and controlled by the brake controller to supply oil to the single-acting oil cylinder stably. The single-acting oil cylinder is connected with a brake of the lifting mechanism and used for controlling the brake to be opened and the brake to be contracting;
the main oil supply system comprises a main oil pump (2), a main motor (3), two electromagnetic reversing valves (4, 5), two pressure relays (6, 7) and an energy accumulator (9), the emergency oil supply system comprises an emergency oil pump (11) and an emergency motor (12), the main motor and the emergency motor are powered by different power supplies, the main motor drives the main oil pump to pump oil in an oil tank, an oil path of the main oil pump is connected with a single-acting oil cylinder through a first electromagnetic reversing valve and a two-position three-way electromagnetic valve, the second electromagnetic reversing valve and the second pressure relay are connected in parallel with the oil path between the first electromagnetic reversing valve and the two-position three-way electromagnetic valve, and the first pressure relay and the energy accumulator are connected in parallel with the oil path between the main oil pump and the first electromagnetic reversing valve; the emergency motor drives the emergency oil pump to pump oil in the oil tank, an oil path of the emergency oil pump is connected with the two-position three-way electromagnetic valve, and the proportional overflow valve is connected in parallel with the oil path between the emergency oil pump and the two-position three-way electromagnetic valve; and the brake controller controls the operation of each motor and the power on or power off of the electromagnet of the electromagnetic valve.
2. The emergency brake release system of claim 1, further comprising a charge and discharge manager; the charge and discharge manager is connected between the battery and the emergency hydraulic brake and is used for managing the charge and discharge process of the battery.
3. The emergency brake release system of claim 1, further comprising a speed sensor; the speed sensor is used for sampling the rotating speed of a lifting motor in the lifting mechanism controlled by the emergency brake release system and uploading the rotating speed information to the brake controller.
4. Emergency brake release system according to claim 1, characterized in that a manual pump (14) is connected in parallel to the oil circuit between the first electromagnetic directional valve and the two-position three-way electromagnetic valve.
5. Emergency brake release system according to claim 1, characterized in that the single-acting cylinder is provided with a spring compression detector (18) for monitoring the compression of the closing spring and sending a signal to the brake controller for adjusting the proportional overflow valve.
6. A control method of an emergency brake release system according to any one of claims 1 to 5, comprising the steps of:
s1, starting a system and performing self-checking;
s2, when the power supply of the lifting mechanism is powered off, starting an emergency brake release system;
s3, when the emergency brake release system is started, the emergency motor is started, so that the emergency oil pump works to inject oil into a rod cavity of the single-acting oil cylinder;
s4, raising the pressure in a rod cavity of the single-acting oil cylinder until a brake of the lifting mechanism is opened in an emergency;
s5, detecting the rotating speed of a lifting motor of the lifting mechanism in real time by a speed sensor, and uploading the detected rotating speed information to a brake controller;
s6, the brake controller issues a control instruction to the proportional overflow valve according to the uploaded rotating speed information of the lifting motor, and the rotating speed of the lifting motor is ensured to work in a set rotating speed range by controlling the action pressure of the proportional overflow valve;
and S7, if the brake controller detects that the rotating speed of the lifting motor is greater than a set threshold value, the brake controller issues a control instruction to the charge-discharge manager, the charge-discharge manager immediately disconnects the battery from the emergency brake release system, and the brake of the lifting mechanism is braked at the moment, so that the safety of the lifting mechanism is ensured.
7. A lifting system characterized by comprising the emergency brake release system according to any one of claims 1 to 5, and the control method according to claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711252237.9A CN108005968B (en) | 2017-12-01 | 2017-12-01 | Emergency brake release system, control method and lifting system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711252237.9A CN108005968B (en) | 2017-12-01 | 2017-12-01 | Emergency brake release system, control method and lifting system thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108005968A CN108005968A (en) | 2018-05-08 |
| CN108005968B true CN108005968B (en) | 2023-09-15 |
Family
ID=62056128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711252237.9A Active CN108005968B (en) | 2017-12-01 | 2017-12-01 | Emergency brake release system, control method and lifting system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108005968B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112503059A (en) * | 2020-05-09 | 2021-03-16 | 上海乾瑞科技有限公司 | Pipeless wireless full-automatic integrated intelligent steel support system and method |
| CN115535903B (en) * | 2022-08-25 | 2024-05-14 | 杭州大杰智能传动科技有限公司 | Braking system, tower crane lifting mechanism for safety braking and braking method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102050202A (en) * | 2010-11-11 | 2011-05-11 | 武汉船用机械有限责任公司 | Shark pincers with emergent release function |
| CN206360940U (en) * | 2016-12-20 | 2017-07-28 | 北京中冶迈克液压有限责任公司 | One kind is coaling vehicle hydraulic system |
| CN207660911U (en) * | 2017-12-01 | 2018-07-27 | 江西工埠机械有限责任公司 | Emergency brake discharges system and its hoisting system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AUPR170400A0 (en) * | 2000-11-28 | 2000-12-21 | Ifield Technology Ltd | Emergency energy release for hydraulic energy storage systems |
-
2017
- 2017-12-01 CN CN201711252237.9A patent/CN108005968B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102050202A (en) * | 2010-11-11 | 2011-05-11 | 武汉船用机械有限责任公司 | Shark pincers with emergent release function |
| CN206360940U (en) * | 2016-12-20 | 2017-07-28 | 北京中冶迈克液压有限责任公司 | One kind is coaling vehicle hydraulic system |
| CN207660911U (en) * | 2017-12-01 | 2018-07-27 | 江西工埠机械有限责任公司 | Emergency brake discharges system and its hoisting system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108005968A (en) | 2018-05-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107739001B (en) | Novel safety emergency hydraulic brake | |
| CN102030280B (en) | Mine-hoist constant deceleration safety braking system and braking method thereof | |
| CN201857238U (en) | Constant deceleration safety braking system for mine hoist | |
| CN206874583U (en) | A kind of aerial work platform hydraulic energy-saving system | |
| CN108005968B (en) | Emergency brake release system, control method and lifting system thereof | |
| CN104444919B (en) | Mine hoist constant deceleration brake electrichydraulic control equipment that can be anti-skidding | |
| CN206872378U (en) | A kind of aerial work platform hydraulic energy-saving system with no-load protection | |
| LU101711B1 (en) | Multi-channel impact-resistant intelligent-constant-decelaration hydraulic braking system | |
| CN207660911U (en) | Emergency brake discharges system and its hoisting system | |
| CN107806484B (en) | Braking system for permanent magnet direct drive mechanism, control method and gate opening and closing mechanism | |
| CN204387167U (en) | The hydraulic braking sytem that a kind of moment is controlled | |
| CN108910646B (en) | A kind of personnel in the pit's emergency gug method based on mine hoisting brake system | |
| CN105398908A (en) | Auxiliary control device of elevator safety tongs | |
| CN201756385U (en) | Power pump station used for hydraulic elevator/hydraulic lift | |
| CN203173620U (en) | Dual-drive hydraulic power pack used for hydraulic elevator | |
| CN105417421A (en) | Safety control system for free falling body winch of dynamic compaction device | |
| CN103663152B (en) | Mast rising-falling control system, method and apparatus, super-lift apparatus and crane | |
| CN201825606U (en) | Power pumping station for hydraulic elevator/hydraulic lift | |
| CN104477809B (en) | The two close cycles adjusting means of mine hoist braking and braking method | |
| CN103253608B (en) | Electrical system controlling dynamic compactor full-release winding braking and working method thereof | |
| CN103395416B (en) | Double-air-channel rotation braking safety detector for gantry cranes | |
| CN102295199B (en) | Power pump station for hydraulic elevator/hydraulic lift | |
| CN207497967U (en) | A kind of new type of safe is met an urgent need liquid braking device | |
| CN106348120B (en) | A kind of mine hoist intelligent and safe brakes | |
| CN207661027U (en) | Braking system and gate open and close device for permanent magnet direct-drive mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |