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CN-122014721-A - Hydraulic speed regulator device for double-lifting-point winch gate, control method and hoist

CN122014721ACN 122014721 ACN122014721 ACN 122014721ACN-122014721-A

Abstract

The invention discloses a hydraulic speed regulator device, a control method and a hoist for a double-lifting-point winch gate, which belong to the technical field of winch equipment control, and comprise an oil tank, a hydraulic motor, a speed regulating oil circuit and a control valve group, wherein the hydraulic motor is provided with an A port and a B port, and the speed regulating oil circuit forms different oil flow paths under different working conditions; under the working condition of falling the door, oil enters from the oil tank through the port B of the hydraulic motor and flows back to the oil tank through the port A of the control valve group, under the working condition of accident, the hydraulic motor reversely drags under the action of the gravity of the gate to generate oil, and the oil flows back to the oil tank through two return oil paths of the speed regulating valve and the proportional speed regulating valve in a split way, the double-lifting-point winch hoist comprises two sets of hoist devices which are symmetrically arranged left and right, each lifting point is provided with the hydraulic speed regulating device, mechanical synchronization is realized through a synchronizing shaft, and the synchronous speed regulating control of the gate is strictly realized through two sets of hydraulic loops of the hydraulic speed regulating devices of the double lifting points under the working condition of falling the door of accident.

Inventors

  • WANG MIN
  • WEN LIANG
  • LI QIAN
  • LI LIJIE
  • LU YONGYA
  • GE WEICONG
  • SUN SHIWEI

Assignees

  • 杭州国电机械设计研究院有限公司

Dates

Publication Date
20260512
Application Date
20260320

Claims (9)

  1. 1. The hydraulic speed regulator device for the double-lifting-point winch gate is characterized by comprising an oil tank (1), a hydraulic motor (3), a speed regulating oil way and a control valve group, wherein the hydraulic motor (3) is provided with an A port and a B port, and the oil tank (1) is used as an oil supply end and an oil return end of a hydraulic system; The speed regulating oil way forms different oil flow paths under different working conditions respectively, and comprises a first working condition and a second working condition; The first working condition comprises that an A port of the hydraulic motor (3) is communicated with the oil tank (1) through a first one-way valve (2) so as to absorb oil from the oil tank (1), and hydraulic oil flows back to the oil tank (1) through an oil return passage through a B port of the hydraulic motor (3); the second working condition comprises that the port B of the hydraulic motor (3) is communicated with the oil tank (1) through a third one-way valve (17) to absorb oil from the oil tank (1), and the oil output by the port A of the hydraulic motor (3) flows back to the oil tank (1) after being conducted through a first control valve group; and when the external drive fails, entering a third working condition, wherein the third working condition comprises: The oil formed by the port A of the hydraulic motor (3) is divided into at least two paths: One path forms a first oil return path through a speed regulating valve (11) and returns to the oil tank (1), and the other path forms a second oil return path through a proportional speed regulating valve (10) and returns to the oil tank (1).
  2. 2. The double hoisting point winch gate hydraulic governor device of claim 1, characterized in that the control valve group comprises a first cartridge valve group (8) and a second cartridge valve group (9); the first cartridge valve group (8) is used for forming an oil liquid flow path under a second working condition; the second cartridge valve group (9) is used for forming an oil liquid flow path under a third working condition; The second cartridge valve group (9) is used for opening an oil return path where the speed regulating valve (11) is located.
  3. 3. The hydraulic governor device of a double-hoisting-point winch gate according to claim 2, characterized in that, The first oil return path comprises an oil suction port B of the hydraulic motor (3) from an oil tank (1) through a third one-way valve (17), oil sequentially passes through a second cartridge valve group (9), a speed regulating valve (11), a second one-way valve (15), a fourth one-way valve (18) and an oil return filter (19) from an port A of the hydraulic motor (3), and finally returns to the oil tank (1); the second oil return path comprises an oil suction port B of the hydraulic motor (3) from the oil tank (1) through a third one-way valve (17), oil sequentially passes through a proportional speed regulating valve (10), a second one-way valve (15), a fourth one-way valve (18) and an oil return filter (19) from an port A of the hydraulic motor (3), and finally returns to the oil tank (1).
  4. 4. The double hoisting point winch gate hydraulic governor device according to claim 1, characterized in that the governor valve (11) is a high flow governor valve for providing a basic flow passage.
  5. 5. The double hoisting point winch gate hydraulic governor device of claim 1, characterized in that the proportional governor valve (10) is an adjustable flow valve.
  6. 6. The double hoisting point winch gate hydraulic governor device according to claim 1, characterized in that the governor oil circuit is provided with a flow meter (5) and a pressure sensor.
  7. 7. A control method of a double hoisting point winch gate hydraulic governor (20), characterized by being used in a double hoisting point winch gate hydraulic governor device according to any of claims 1-6, comprising the steps of: Under the first working condition, enabling an A port of the hydraulic motor (3) to absorb oil from the oil tank (1) and return oil to the oil tank (1) through a B port; Under the second working condition, enabling the port B of the hydraulic motor (3) to absorb oil from the oil tank (1), and enabling the oil output by the port A of the hydraulic motor (3) to flow back to the oil tank (1) through the control valve group; under the third working condition, the hydraulic motor (3) is driven to rotate by using the gravity of the gate, so that oil liquid generated in the port A flows back to the oil tank (1) through a first oil return path and a second oil return path respectively formed by the speed regulating valve (11) and the proportional speed regulating valve (10), and the descending speed of the gate is controlled by regulating the opening of the proportional speed regulating valve (10).
  8. 8. The control method of the double hoisting point winch gate hydraulic governor (20) of claim 7, characterized in that the third working condition early stage increases the opening of the proportional governor valve (10) to increase the gate lowering speed; And in the later stage of the third working condition, the opening degree of the proportional speed regulating valve (10) is reduced so as to reduce gate impact.
  9. 9. The double-hoisting-point winch hoist is characterized by comprising a first hoist device and a second hoist device, wherein the first hoist device and the second hoist device are both arranged as the double-hoisting-point winch gate hydraulic speed regulator device according to any one of claims 1-6; the device also comprises a first rack (24) and a second rack (24) which are respectively used for installing the first opening and closing device and the second opening and closing device; The first headstock gear and the second headstock gear bilateral symmetry set up, first headstock gear includes: a variable frequency motor (4), a hydraulic speed regulator (20), a speed reducer (16), a brake (21) and a winding drum device (6); the variable frequency motor (4) is of a double-shaft output structure, one end of the variable frequency motor is connected with the hydraulic speed regulator (20), and the other end of the variable frequency motor is connected with an input shaft of the speed regulator (16); The brake (21) is arranged between the variable frequency motor (4) and the speed reducer (16) and is used for braking and controlling the transmission system; An output shaft of the speed reducer (16) is connected with the winding drum device (6) and is used for driving the winding drum device (6) to rotate; The steel wire rope is wound on the winding drum device (6) and is connected with the gate through the movable pulley and the lifting appliance (23); The first opening and closing device and the second opening and closing device are connected through a synchronous shaft (22), and two ends of the synchronous shaft (22) are respectively connected with corresponding speed reducers (16).

Description

Hydraulic speed regulator device for double-lifting-point winch gate, control method and hoist Technical Field The invention relates to a hydraulic speed regulator device for a double-lifting-point winch gate, a control method and a hoist, and belongs to the technical field of winch equipment control. Background With the continuous development of water conservancy and hydropower engineering, navigation hub and large-scale gate engineering, the winch hoist is widely applied to the hoist control of various gates due to the advantages of compact structure, flexible arrangement, strong bearing capacity and the like. For gates with larger span or higher stress requirement, a double-lifting-point structure is generally adopted, and the left and right sets of opening and closing devices work cooperatively to improve the running stability of the gate and reduce single-point stress, so that the gate is prevented from tilting or blocking in the opening and closing process. In the prior art, a winch hoist is mainly controlled by directly driving a motor or matching with a brake to realize door opening and door falling, but in the descending process of a gate, particularly under the working condition of a large-tonnage gate or a high water head, stable speed regulation is difficult to realize by simply relying on mechanical braking, the problems of over-high descending speed, large impact force and the like are easy to occur, and the service life and the operation safety of equipment are further influenced. Therefore, part of the system is introduced into a hydraulic speed regulating device, and the descending process of the gate is regulated through the hydraulic motor and the oil circuit system. However, in practical application, most of the existing hydraulic speed regulating systems are designed aiming at normal door opening or normal door falling working conditions, and under accident working conditions such as power failure or driving failure, an effective and reliable oil way speed regulating path is lacking, so that a gate falls down quickly under the action of dead weight, and a large potential safety hazard exists. In addition, the functional coupling degree of the oil path elements in part of the system is higher, and a grading control means aiming at different working conditions is lacked, so that the speed regulation precision is insufficient or the response is lagged. Disclosure of Invention The invention aims to overcome the defects in the prior art and solve the problems that the existing winch gate opening and closing system has insufficient speed regulation capability under different working conditions and a hydraulic oil path is single. In order to solve the technical problems, the invention is realized by adopting the following technical scheme: The first aspect provides a hydraulic speed regulator device of a double-lifting-point winch gate, which comprises an oil tank, a hydraulic motor, a speed regulating oil circuit and a control valve group, wherein the hydraulic motor is provided with an A port and a B port, and the oil tank is used as an oil supply end and an oil return end of a hydraulic system; The speed regulating oil way forms different oil flow paths under different working conditions respectively, and comprises a first working condition and a second working condition; the first working condition comprises that an A port of the hydraulic motor is communicated with an oil tank through a first one-way valve to absorb oil from the oil tank, and hydraulic oil flows back to the oil tank through an oil return passage through a B port of the hydraulic motor; The second working condition comprises that a port B of the hydraulic motor is communicated with an oil tank through a third one-way valve to absorb oil from the oil tank, and oil output by a port A of the hydraulic motor flows back to the oil tank after being conducted through a first control valve group; and when the external drive fails, entering a third working condition, wherein the third working condition comprises: The oil formed by the port A of the hydraulic motor is divided into at least two paths: One path forms a first oil return path through a speed regulating valve and returns to the oil tank, and the other path forms a second oil return path through a proportional speed regulating valve and returns to the oil tank. Further, the control valve group comprises a first cartridge valve group and a second cartridge valve group; the first cartridge valve group is used for forming an oil flow path under a second working condition; the second cartridge valve group is used for forming an oil flow path under a third working condition; The second cartridge valve group is used for opening an oil return path where the speed regulating valve is located. Further, the first oil return path comprises an oil suction port B of the hydraulic motor is used for sucking oil from an oil tank through a third one-way valve, oil sequentially passes thro