CN113309751B - Integrated control valve, hydraulic system, winding device and engineering machinery - Google Patents
Integrated control valve, hydraulic system, winding device and engineering machinery Download PDFInfo
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- CN113309751B CN113309751B CN202110608086.6A CN202110608086A CN113309751B CN 113309751 B CN113309751 B CN 113309751B CN 202110608086 A CN202110608086 A CN 202110608086A CN 113309751 B CN113309751 B CN 113309751B
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/02—Driving gear
- B66D1/08—Driving gear incorporating fluid motors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
- B66D1/40—Control devices
- B66D1/42—Control devices non-automatic
- B66D1/44—Control devices non-automatic pneumatic of hydraulic
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- 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
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- 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
- F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
- F15B2013/0448—Actuation by solenoid and permanent magnet
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- General Life Sciences & Earth Sciences (AREA)
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The disclosure provides an integrated control valve, a hydraulic system, a winding device and engineering machinery. The integrated control valve includes: the first control unit is configured to enable the oil outlet of the first control unit to be communicated with the first oil inlet of the first control unit and the second oil inlet of the first control unit under the condition that the pressure of the oil outlet of the first control unit is higher than the pressure of the first oil inlet of the first control unit and the pressure of the second oil inlet of the first control unit is lower than the pressure of the second oil inlet of the first control unit; the second control unit is provided with a control port connected with the oil outlet of the first control unit, an oil inlet connected with the first oil duct, an oil outlet connected with the second oil duct and an oil outlet connected with the oil return port; and the third control unit is provided with a control end, an oil inlet connected with the second oil duct, an oil outlet connected with the third oil duct and an oil outlet connected with the oil return port. The hydraulic system includes: the hydraulic brake system comprises an actuating element, a balance valve, a hydraulic brake, an integrated control valve and a pressure oil source. The hydraulic system with the integrated control valve is applied to a hoisting device and engineering machinery, and the action stability of an actuating element can be improved by adjusting the opening time of a hydraulic brake and the balance valve.
Description
Technical Field
The disclosure relates to the field of engineering machinery, in particular to an integrated control valve, a hydraulic system, a winding device and engineering machinery.
Background
Winches in the field of construction machinery typically use hydraulic motors to drive drums which wind wire ropes to raise or lower weights. The hydraulic system of the winding device mainly comprises a hydraulic motor, a balance valve, a hydraulic brake, a pump and a control valve. The balance valve plays a role in load keeping and speed control in the falling process of the winch, the balance valve is controlled to be opened reversely, the load energy of the falling winch can be throttled and consumed, and meanwhile the opening of the reverse conduction control port can be adjusted according to the movement speed of the load. The control valve can be used for controlling the opening and closing of the hoisting brake and the rising and falling of the hoisting device.
However, in the practical application process, because the opening time of the hoisting brake in the hydraulic system of the hoisting device is not matched with the opening time of the balance valve, the hoisting device may have the problems of secondary hoisting gliding, shaking, start-stop impact and the like in the rising and falling process.
Disclosure of Invention
The first aspect of the present disclosure provides an integrated control valve, have a plurality of oil feed ports, a port of producing oil, return oil port, first oil duct, second oil duct and with the third oil duct that the port of producing oil is connected, a plurality of oil feed ports include first oil feed port, second oil feed port, integrated control valve includes:
the first control unit is provided with a first oil inlet connected with the first oil inlet port, a second oil inlet connected with the second oil inlet port and an oil outlet, and the oil outlet is configured to be communicated with the first oil inlet of the first control unit and the second oil inlet of the second control unit when the pressure is high and disconnected when the pressure is low;
a second control unit having a control port connected to the oil outlet of the first control unit, an oil inlet connected to the first oil passage, an oil outlet connected to the second oil passage, and an oil drain port connected to the oil return port, the control port being configured to control the second control unit to switch between a first operating state in which the oil inlet is open to the oil outlet and the oil drain port is closed, and a second operating state in which the oil inlet is closed and the oil outlet is open to the oil drain port; and
and the control end is configured to control the third control unit to be switched between a first working state and a second working state, the oil inlet of the third control unit is communicated with the oil outlet of the third control unit, the oil outlet of the third control unit is disconnected with the oil outlet of the third control unit, and the oil inlet of the third control unit is disconnected with the oil outlet of the third control unit, and the oil outlet of the third control unit is communicated with the oil outlet of the third control unit.
In accordance with some embodiments of the present disclosure,
the first control unit comprises a shuttle valve, and a first oil inlet, a second oil inlet and an oil outlet of the first control unit are respectively a first oil inlet, a second oil inlet and an oil outlet of the shuttle valve; and/or the presence of a gas in the gas,
the second control unit comprises a hydraulic control reversing valve, and a control port, an oil inlet, an oil outlet and an oil outlet of the second control unit are respectively a control port, an oil inlet, an oil outlet and an oil outlet of the hydraulic control reversing valve; and/or the presence of a gas in the gas,
the third control unit comprises an electromagnetic directional valve, and the control end, the oil inlet, the oil outlet and the oil outlet of the third control unit are respectively the control end, the oil inlet, the oil outlet and the oil outlet of the electromagnetic directional valve.
According to some embodiments of the present disclosure, the plurality of oil feed ports further includes a third oil feed port connected with the first oil passage.
According to some embodiments of the present disclosure, the oil outlet of the first control unit is connected with the first oil passage.
According to some embodiments of the present disclosure, the control system further comprises a pressure maintaining valve, and the oil outlet of the first control unit is connected with the first oil passage through the pressure maintaining valve.
According to some embodiments of the present disclosure, the plurality of oil feed ports further includes a fourth oil feed port connected with the second oil passage.
According to some embodiments of the present disclosure, the oil supply device further comprises a fourth control unit, the fourth oil inlet is connected with the second oil duct through the fourth control unit, and the fourth control unit is configured to control on/off of the fourth oil inlet and the second oil duct.
According to some embodiments of the disclosure, the fourth control unit is a solenoid directional valve.
A second aspect of the present disclosure provides a hydraulic system having a first oil feed end and a second oil feed end, the hydraulic system comprising:
the actuating element is provided with a first working oil port and a second working oil port, the first working oil port is connected with the first oil supply end, and the second working oil port is connected with the second oil supply end;
the balance valve is arranged between the first oil supply end and the first working oil port of the actuating element and is provided with a control port connected to the second oil supply end;
a hydraulic brake having a brake control port for bringing the actuator into or out of a braking state;
in the integrated control valve according to the first aspect of the present disclosure, a first oil inlet port of the integrated control valve is connected to the first oil supply end, a second oil inlet port of the integrated control valve is connected to the second oil supply end, and an oil outlet port of the integrated control valve is connected to a brake control port of the hydraulic brake; and
a pressure oil source configured to supply oil to the first oil supply port, the second oil supply port, and the plurality of oil supply ports of the integrated control valve.
A third aspect of the present disclosure provides a hydraulic system having a first oil feed end and a second oil feed end, the hydraulic system comprising:
the actuating element is provided with a first working oil port and a second working oil port, the first working oil port is connected with the first oil supply end, and the second working oil port is connected with the second oil supply end;
the balance valve is arranged between the first oil supply end and the first working oil port of the actuating element and is provided with a control port connected to the second oil supply end;
a hydraulic brake having a brake control port for bringing the actuator into or out of a braking state;
a first oil passage, a second oil passage, a third oil passage and an oil discharge oil passage;
the first control unit is provided with a first oil inlet connected with the first oil supply end, a second oil inlet connected with the second oil supply end and an oil outlet, and the oil outlet is configured to be communicated with the first oil inlet of the first control unit and the second oil inlet of the second control unit when the pressure is higher than the pressure of the first oil inlet of the first control unit and the pressure is lower than the pressure of the second oil inlet of the second control unit;
the second control unit is provided with a control port connected with the oil outlet of the first control unit, an oil inlet connected with the first oil duct, an oil outlet connected with the second oil duct and an oil outlet connected with the oil discharge duct, the control port is configured to control the second control unit to be switched between a first working state and a second working state, the oil inlet of the second control unit is communicated with the oil outlet of the second control unit while the oil outlet of the second control unit is disconnected in the first working state, and the oil inlet of the second control unit is disconnected while the oil outlet of the second control unit is communicated with the oil outlet of the second control unit in the second working state;
a third control unit having a control end, an oil inlet connected to the second oil passage, an oil outlet connected to the third oil passage, and an oil drain port connected to the oil drain passage, the control end being configured to control the third control unit to switch between a first operating state in which the oil inlet is communicated with the oil outlet thereof and the oil drain port is disconnected, and a second operating state in which the oil inlet is disconnected and the oil outlet is communicated with the oil drain port thereof, the third oil passage being connected to the brake control port of the hydraulic brake; and
a pressure oil source configured to supply oil to the first oil supply end, the second oil supply end, and the first oil passage.
In accordance with some embodiments of the present disclosure,
the first control unit comprises a shuttle valve, and a first oil inlet, a second oil inlet and an oil outlet of the first control unit are respectively a first oil inlet, a second oil inlet and an oil outlet of the shuttle valve; and/or the presence of a gas in the gas,
the second control unit comprises a hydraulic control reversing valve, and a control port, an oil inlet, an oil outlet and an oil outlet of the second control unit are respectively a control port, an oil inlet, an oil outlet and an oil outlet of the hydraulic control reversing valve; and/or the presence of a gas in the atmosphere,
the third control unit comprises an electromagnetic directional valve, and a control end, an oil inlet, an oil outlet and an oil outlet of the third control unit are respectively a control end, an oil inlet, an oil outlet and an oil outlet of the electromagnetic directional valve.
According to some embodiments of the disclosure, the pressure oil source comprises a first regulated oil source connected with the first oil passage.
According to some embodiments of the present disclosure, the pressure oil source is connected with the first oil passage through an oil outlet of the first control unit.
According to some embodiments of the present disclosure, the control system further comprises a pressure maintaining valve, and the oil outlet of the first control unit is connected with the first oil passage through the pressure maintaining valve.
According to some embodiments of the present disclosure, the pressure oil source further comprises a fourth control unit, the pressure oil source comprises a second pressure stabilizing oil source, the second pressure stabilizing oil source is connected with the second oil passage through the fourth control unit, and the fourth control unit is configured to control on and off of the second pressure stabilizing oil source and the second oil passage.
According to some embodiments of the disclosure, the fourth control unit is a solenoid directional valve.
The fourth aspect of the present disclosure provides a hoisting device, including the second aspect of the present disclosure or the third aspect of the present disclosure, the actuating element includes a hydraulic motor, and the first working oil port and the second working oil port of the actuating element are the first working oil port and the second working oil port of the hydraulic motor.
A fifth aspect of the present disclosure provides a working machine including the hydraulic system according to the second aspect of the present disclosure or the third aspect of the present disclosure.
Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure. In the drawings:
FIG. 1 is a hydraulic schematic of an integrated control valve according to some embodiments of the present disclosure.
FIG. 2 is a hydraulic schematic of an integrated control valve according to further embodiments of the present disclosure.
FIG. 3 is a hydraulic schematic of an integrated control valve according to further embodiments of the present disclosure.
FIG. 4 is a hydraulic schematic of an integrated control valve according to still further embodiments of the present disclosure.
Fig. 5 is a hydraulic schematic of a hydraulic system according to some embodiments of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present disclosure, it should be understood that the terms "first", "second", etc. are used to define the components, and are used only for convenience of distinguishing the corresponding components, and if not otherwise stated, the terms have no special meaning, and thus, should not be construed as limiting the scope of the present disclosure.
In the description of the present disclosure, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are presented only for the convenience of describing and simplifying the disclosure, and in the absence of a contrary indication, these directional terms are not intended to indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the disclosure; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
As shown in fig. 1 to 4, some embodiments of the present disclosure provide an integrated control valve 2, the integrated control valve 2 having a plurality of oil inlet ports, an oil outlet port B, an oil return port T, a first oil passage H1, a second oil passage H2, and a third oil passage H3 connected to the oil outlet port B. The plurality of oil inlet ports includes a first oil inlet port A1, a second oil inlet port A2, and the integrated control valve 2 includes a first control unit 21, a second control unit 22, and a third control unit 25.
The first control unit 21 has a first oil inlet S1 connected to the first oil inlet port A1, a second oil inlet S2 connected to the second oil inlet port A2, and an oil outlet S3. The first control unit 21 is configured such that its oil outlet S3 is in communication with the higher pressure one of its first oil inlet S1 and its second oil inlet S2 and is disconnected from the lower pressure one.
The second control unit 22 has a control port K connected to the oil outlet S3 of the first control unit 21, an oil inlet P1 connected to the first oil passage H1, an oil outlet AP1 connected to the second oil passage H2, and an oil discharge port T1 connected to the oil return port T, the control port K is configured to control the second control unit 22 to switch between a first operating state and a second operating state, in the first operating state of the second control unit 22, the oil inlet P1 is communicated with the oil outlet AP1 thereof and the oil discharge port T1 thereof is disconnected, in the second operating state of the second control unit 22, the oil inlet P1 is disconnected and the oil outlet AP1 thereof is communicated with the oil discharge port T1 thereof.
The third control unit 25 has a control end Y1, an oil inlet P2 connected to the second oil passage H2, an oil outlet AP2 connected to the third oil passage H3, and an oil drain T2 connected to the oil return port T, the control end Y1 is configured to control the third control unit 25 to switch between a first operating state and a second operating state, in the first operating state of the third control unit 25, the oil inlet P2 thereof is communicated with the oil outlet AP2 thereof and the oil drain T2 thereof is disconnected, and in the second operating state of the third control unit 25, the oil inlet P2 thereof is disconnected and the oil outlet AP2 thereof is communicated with the oil drain T2 thereof. The control end Y1 of the third control unit 25 may take the form of hydraulic control, electric control, manual control, etc.
In order to reduce the risk that oil reversely flows into the brake control port R from the oil return port T through the oil outlet port B when the back pressure of the oil return line is too high, as shown in fig. 1 to 4, a check valve 28 may be disposed at the oil return port T, and an oil inlet of the check valve 28 is connected to the oil outlet T2 of the first control unit 25 and the oil outlet T1 of the second control unit 22. In order to improve the reliability of the integrated control valve 2 during use, a hydraulic filter 26 may also be provided at each oil inlet port, as shown in fig. 1 to 4.
According to the above arrangement of the control units and ports of the integrated control valve 2, the oil outlet port B of the integrated control valve 2 can be used as a control port of the hydraulic element, wherein in the second operation state of the third control unit 25, even if the second control unit 22 is switched from the second operation state to the first operation state by the control port K, the oil inlet ports of the integrated control valve 2 are not communicated with the oil outlet port B, and on one hand, the hydraulic element connected to the oil outlet port B is not easily subjected to malfunction, and on the other hand, the operation time of the hydraulic element connected to the oil outlet port B can be adjusted by adjusting the time of inputting the control signal to the control port Y1 of the third control unit 25.
As shown in fig. 5, some embodiments of the present disclosure also provide a hydraulic system having a first oil supply end W1 and a second oil supply end W2, the hydraulic system including an actuator 4, a balance valve 1, a hydraulic brake 3, the aforementioned integrated control valve 2, and a pressure oil source.
The actuating element 4 is provided with a first working oil port M1 and a second working oil port M2, the first working oil port M1 is connected with the first oil supply end W1, and the second working oil port M2 is connected with the second oil supply end W2.
The balance valve 1 is disposed between the first oil supply end W1 and the first working oil port M1 of the actuator 4, and has a control port X2 connected to the second oil supply end W2, and the control port X2 of the balance valve 1 is used to control whether the balance valve is reversely opened.
The hydraulic brake 3 has a brake control port R for bringing the actuator 4 into or out of a braking state.
A first oil inlet port A1 of the integrated control valve 2 is connected with a first oil supply end W1, a second oil inlet port A2 of the integrated control valve 2 is connected with a second oil supply end W2, and an oil outlet port B of the integrated control valve 2 is connected with a brake control port R of the hydraulic brake 3.
The pressure oil source is configured to supply oil to the first oil supply port W1, the second oil supply port W2, and the plurality of oil supply ports of the integrated control valve 2.
Some embodiments of the present disclosure also provide a hoisting device including the aforementioned hydraulic system. The actuating element 4 comprises a hydraulic motor, and the first working oil port M1 and the second working oil port M2 of the actuating element 4 are the first working oil port and the second working oil port of the hydraulic motor.
The integrated control valve 2 shown in fig. 1 to 5 will be further described with reference to the connection relationship between the integrated control valve and the hydraulic system and the winding device.
In the related art known to the inventor, the winding apparatus employing hydraulic control has the following problems:
for the situation that the hoisting device lifts the load, the time that two working oil ports of the hydraulic motor reach the pressure required by lifting the load and the time that the hydraulic brake releases the brake are difficult to be synchronized. For example, when the hoisting device is lifted under a heavy load condition, if the pressure of the first working fluid port of the hydraulic motor does not reach the pressure required for lifting the load, the hydraulic brake releases the brake in advance, which may cause the load to stall and slide down. For another example, when the hoisting device is lifted under a light load, if the pressure of the first hydraulic port of the hydraulic motor reaches the pressure required for lifting the load, the hydraulic brake does not release the brake, and when the hydraulic brake suddenly releases the brake, hydraulic shock is caused.
In the case of lowering the load by the hoisting device, the opening or closing of the control port of the balance valve and the sequence of the hydraulic brake entering or releasing the brake state may be out of phase. For example, under heavy load conditions, if the opening pressure of a control valve for controlling a hydraulic brake is greater than the reverse opening pressure of a balance valve, when the hoisting device starts to lower, the balance valve is opened in the reverse direction before the hydraulic brake releases the braking state, and when the hydraulic brake releases the braking state, the load is accelerated to slide down; when the hoisting device stops lowering, the hydraulic brake enters a braking state and is closed in a reverse direction before the balance valve, and the hydraulic brake may cause mechanical lock of a speed reducer of the hoisting device due to sudden entering of the braking state.
In addition, if the back pressure of a hydraulic pipeline in which the first oil supply end or the second oil supply end is arranged in the hydraulic system is too high, the hydraulic brake can be released from a braking state, and the load is controlled only by the balance valve, so that the risk of automatic falling is generated.
For the hoisting device provided by the embodiment of the present disclosure and using the integrated control valve 2 to control the hydraulic brake 3, when the pressure oil source supplies oil to either the first oil supply end W1 or the second oil supply end W2, the first control unit 21 can output a hydraulic control signal to the second control unit 22, but as long as the third control unit 25 is actively controlled to be in the second working state, the hydraulic brake 3 will not release the braking state in advance no matter how the second control unit 22 is in the working state, so as to facilitate improving the problem that the load slips and slips due to the hydraulic brake releasing the braking in advance. Moreover, only when the second control unit 22 is in the first operating state and the third control unit 25 is in the first operating state, the pressure oil source can supply oil to the hydraulic brake 3 through the integrated control valve 2, and the risk that the hydraulic brake 3 releases the braking state due to an excessively large back pressure in the hydraulic line where the first oil supply end W1 or the second oil supply end W2 is located can be reduced.
As shown in fig. 1 to 4, in the integrated control valve of some embodiments, the first control unit 21 includes a shuttle valve, and the first oil inlet S1, the second oil inlet S2 and the oil outlet S3 of the first control unit 21 are respectively a first oil inlet, a second oil inlet and an oil outlet of the shuttle valve.
As shown in fig. 1 to 4, in the integrated control valve of some embodiments, the second control unit 22 includes a pilot-controlled directional control valve, and the control port K, the oil inlet P1, the oil outlet AP1, and the oil drain port T1 of the second control unit 22 are respectively a control port, an oil inlet, an oil outlet, and an oil drain port of the pilot-controlled directional control valve. In order to improve the stability of the pilot-controlled reversing valve during reversing, a first damper 24 may be provided between the control port of the pilot-controlled reversing valve and the oil outlet S3 of the first control unit. In order to adjust the time at which the hydraulic brake 3 enters the braking state when the second control unit 22 is in the second operating state, a second damper 27 may be provided between the oil drain port T1 and the oil return port T of the second control unit 22.
As shown in fig. 1 to 4, in the integrated control valve of some embodiments, the third control unit 25 includes an electromagnetic directional valve, and the control end Y1, the oil inlet P2, the oil outlet AP2, and the oil drain T2 of the third control unit 25 are respectively a control end, an oil inlet, an oil outlet, and an oil drain of the electromagnetic directional valve.
As shown in fig. 1 and 2, in the integrated control valve of some embodiments, the plurality of oil feed ports further includes a third oil feed port P, and the third oil feed port P is connected to the first oil passage H1. At this time, the first oil inlet port A1 and the second oil inlet port A2 supply oil to the control end K of the second control unit 22, and the third oil inlet port P supplies oil to the oil inlet P1 of the second control unit 22. The third oil inlet port P may be connected to a pressure stabilizing oil source to stabilize the pressure of the oil inlet P1 of the second control unit 22.
As shown in fig. 3 and 4, in the integrated control valve of some embodiments, the oil outlet S3 of the first control unit 21 is connected to the first oil passage H1. At this time, the first oil inlet port A1 and the second oil inlet port A2 supply oil to both the control end K of the second control unit 22 and the oil inlet P1 of the second control unit 22.
As shown in fig. 3 and 4, in the integrated control valve of some embodiments, the integrated control valve 2 further includes a pressure maintaining valve 29, and the oil outlet S3 of the first control unit 21 is connected to the first oil passage H1 through the pressure maintaining valve 29. The pressure stabilizing valve 29 can keep the pressure of the oil inlet P1 of the second control unit 22 stable, and similarly, a pressure stabilizing oil source is connected to the oil inlet P1 of the second control unit 22.
As shown in fig. 1 to 4, in the integrated control valve of some embodiments, the plurality of oil inlet ports further includes a fourth oil inlet port A3, and the fourth oil inlet port A3 is connected to the second oil passage H2. When the hydraulic control reversing valve breaks down, a pressure stabilizing oil source can be introduced from the fourth oil inlet port A3, so that the winding device can continue to stably operate.
As shown in fig. 2 and 4, in the integrated control valve of some embodiments, the integrated control valve 2 further includes a fourth control unit 23, the fourth oil inlet port A3 is connected to the second oil passage H2 through the fourth control unit 23, and the fourth control unit 23 is configured to control on/off of the fourth oil inlet port A3 and the second oil passage H2. The control end Y2 of the fourth control unit 23 may be controlled by a hydraulic control, an electric control, a manual control, etc. When the fourth oil inlet port A3 is connected to the pressure-stabilizing oil source, the control signal may be directly sent to the third control unit 25 and the fourth control unit 23 without passing through the second control unit 22, so as to adjust the time when the hydraulic brake 3 enters or releases the braking state, which is beneficial to keeping the actions of the hydraulic brake 3 and the hydraulic motor stable.
For the situation that the hoisting device transfers the load under the heavy-load condition, when the hoisting device starts to transfer, the hydraulic brake 3 can be controlled to timely release the brake, so that the problem that the load slides downwards in an accelerating way is solved, when the hoisting device stops transferring, the hydraulic brake 3 can be controlled to delay the hydraulic brake to enter a braking state, and the problem that the speed reducer of the hoisting device is mechanically locked due to the fact that the hydraulic brake 3 suddenly enters the braking state is solved.
In the above embodiment, the fourth control unit 23 may be an electromagnetic directional valve.
The operation of the hydraulic system of the winding device will be described with reference to fig. 5.
When the winch device is in a non-working state, the first oil supply end W1 and the second oil supply end W2 do not have oil, the control end Y1 of the third control unit 25 is powered off, the hydraulic brake 3 is in a braking state, the balance valve 1 is not conducted in the forward direction and the reverse direction, and the winch device does not perform lifting and lowering actions.
When the hoisting device lifts a load, oil enters the first oil supply end W1, the balance valve 1 is conducted in the forward direction, and pressure oil enters the first working oil port M1 and the first oil inlet port A1 of the hydraulic motor. The pressure oil entering the first oil inlet port A1 sequentially passes through the first oil inlet S1 and the oil outlet S3 of the first control unit 21 to act on the control port K of the second control unit 22, so that the second control unit 22 is switched from the second working state to the first working state. When the control end Y1 of the third control unit 25 is powered on, the third oil inlet port P is connected to the oil outlet port B, the pressure-stabilizing oil source CS1 supplies oil to the hydraulic brake 3, the hydraulic brake 3 is released from the braking state, the hydraulic motor drives the load to rise, and the second oil supply end W2 returns oil. When the first oil supply end W1 stops feeding oil, the second control unit 22 is switched from the first working state to the second working state, the pressure oil of the hydraulic brake 3 is discharged from the brake control port R through the oil outlet port B and the oil return port T in sequence, and the hydraulic brake 3 enters the braking state.
When the winch device transfers a load, the second oil supply end W2 takes oil, pressure oil enters the second working oil port M2 of the hydraulic motor, the control port X2 of the balance valve 1 and the second oil inlet port A2, and the balance valve 1 is conducted reversely. The pressure oil entering the second oil inlet port A2 sequentially passes through the second oil inlet S2 and the oil outlet S3 of the first control unit 21 to act on the control port K of the second control unit 22, so that the second control unit 22 is switched from the second working state to the first working state. When the control end Y1 of the third control unit 25 is powered on, the third oil inlet port P is connected to the oil outlet port B, the pressure-stabilizing oil source CS1 supplies oil to the hydraulic brake 3, the hydraulic brake 3 releases the brake, the hydraulic motor drives the load to descend, and the first oil supply end W1 returns oil at the same time. When the second oil supply end W2 stops feeding oil, the second control unit 22 is switched from the first working state to the second working state, the pressure oil of the hydraulic brake 3 is discharged from the brake control port R through the oil outlet port B and the oil return port T in sequence, and the hydraulic brake 3 enters the braking state.
According to the load of the hoisting device, a fourth control unit 23 can be added, and the time for supplying oil to the hydraulic brake 3 is advanced or delayed by respectively controlling the power-on time of the control end Y1 of the third control unit 25 and the power-on time of the control end Y2 of the fourth control unit 23, so that the stability of the hoisting device during starting and stopping is improved.
Some embodiments of the present disclosure also provide another hydraulic system in which the above-mentioned first, second, third and fourth control units may not necessarily be accessed in the form of an integrated control valve 2, but may each be provided independently or partially integrated within the hydraulic system. The hydraulic system has a first oil supply end W1 and a second oil supply end W2, and includes an actuator 4, a balance valve 1, a hydraulic brake 3, a first oil passage H1, a second oil passage H2, a third oil passage H3, an oil discharge passage H4, a first control unit 21, a second control unit 22, a third control unit 25, and a pressure oil source.
The actuating element 4 is provided with a first working oil port M1 and a second working oil port M2, the first working oil port M1 is connected with the first oil supply end W1, and the second working oil port M2 is connected with the second oil supply end W2.
The balance valve 1 is disposed between the first oil supply end W1 and the first working oil port M1 of the actuator 4, and has a control port X2 connected to the second oil supply end W2, and the control port X2 of the balance valve 1 is used to control whether the balance valve is reversely opened.
The hydraulic brake 3 has a brake control port R for bringing the actuator 4 into or out of a braking state.
The first control unit 21 has a first oil inlet S1 connected to the first oil supply end W1, a second oil inlet S2 connected to the second oil supply end W2, and an oil outlet S3, and is configured such that the oil outlet S3 is in communication with a higher pressure one of the first oil inlet S1 and the second oil inlet S2 thereof, and is disconnected from a lower pressure one thereof.
The second control unit 22 has a control port K connected to the oil outlet S3 of the first control unit 21, an oil inlet P1 connected to the first oil passage H1, an oil outlet AP1 connected to the second oil passage H2, and an oil discharge port T1 connected to the oil discharge passage H4, the control port K is configured to control the second control unit 22 to switch between a first operating state and a second operating state, in the first operating state of the second control unit 22, the oil inlet P1 is communicated with the oil outlet AP1 thereof and the oil discharge port T1 thereof is disconnected, in the second operating state of the second control unit 22, the oil inlet P1 is disconnected and the oil outlet AP1 thereof is communicated with the oil discharge port T1 thereof.
The third control unit 25 has a control end Y1, an oil inlet P2 connected to the second oil passage H2, an oil outlet AP2 connected to the third oil passage H3, and an oil discharge port T2 connected to the oil discharge passage H4, the control end Y1 is configured to control the third control unit 25 to switch between a first operating state and a second operating state, in the first operating state of the third control unit 25, the oil inlet P2 is communicated with the oil outlet AP2 thereof and the oil discharge port T2 thereof is disconnected, in the second operating state of the third control unit 25, the oil inlet P2 is disconnected and the oil outlet AP2 thereof is communicated with the oil discharge port T2 thereof, and the third oil passage H3 is connected to the brake control port R of the hydraulic brake 3.
The pressure oil source is configured to supply oil to the first oil supply end W1, the second oil supply end W2, and the first oil passage H1.
As shown in fig. 1 to 4, in some embodiments, the first control unit 21 includes a shuttle valve, and the first oil inlet S1, the second oil inlet S2 and the oil outlet S3 of the first control unit 21 are respectively a first oil inlet, a second oil inlet and an oil outlet of the shuttle valve.
As shown in fig. 1 to 4, in some embodiments, the second control unit 22 includes a hydraulic control directional control valve, and the control port K, the oil inlet P1, the oil outlet AP1, and the oil drain port T1 of the second control unit 22 are respectively a control port, an oil inlet, an oil outlet, and an oil drain port of the hydraulic control directional control valve.
As shown in fig. 1 to 4, in some embodiments, the third control unit 25 includes a solenoid directional valve, and the control end Y1, the oil inlet P2, the oil outlet AP2 and the oil drain T2 of the third control unit 25 are respectively a control end, an oil inlet, an oil outlet and an oil drain of the solenoid directional valve.
As shown in fig. 5, in some embodiments, the pressure oil source includes a first steady oil source CS1 connected to the first oil passage H1.
As shown in fig. 3 and 4, in some embodiments, the pressure oil source is connected to the first oil passage H1 through the oil outlet S3 of the first control unit 21.
As shown in fig. 3 and 4, in some embodiments, the hydraulic system further includes a pressure maintaining valve 29, and the oil outlet S3 of the first control unit 21 is connected to the first oil passage H1 through the pressure maintaining valve 29.
As shown in fig. 2, 4 and 5, in some embodiments, the hydraulic system further includes a fourth control unit 23, the pressure oil source includes a second pressure-stabilizing oil source CS2, the second pressure-stabilizing oil source CS2 is connected to the second oil passage H2 through the fourth control unit 23, and the fourth control unit 23 is configured to control on/off of the second pressure-stabilizing oil source CS2 and the second oil passage H2.
As shown in fig. 2 and 4, in some embodiments, the fourth control unit 23 is a solenoid directional valve.
The connection relationship and the function of each hydraulic component in the hydraulic system can refer to the related description.
Some embodiments of the disclosure also provide a working machine including the aforementioned hydraulic system. By adopting the hydraulic system, the motion stability of the engineering machinery can be improved.
Finally, it should be noted that: the above examples are intended only to illustrate the technical solutions of the present disclosure and not to limit them; although the present disclosure has been described in detail with reference to preferred embodiments, those of ordinary skill in the art will understand that: modifications to the embodiments of the disclosure or equivalent replacements of parts of the technical features may be made, which are all covered by the technical solution claimed by the disclosure.
Claims (15)
1. The utility model provides an integrated control valve (2), its characterized in that has a plurality of oil feed ports, oil outlet port (B), oil return port (T), first oil duct (H1), second oil duct (H2) and with third oil duct (H3) that oil outlet port (B) is connected, a plurality of oil feed ports include first oil feed port (A1), second oil feed port (A2), integrated control valve (2) includes:
a first control unit (21) having a first oil inlet (S1) connected to the first oil inlet port (A1), a second oil inlet (S2) and an oil outlet (S3) connected to the second oil inlet port (A2), configured such that the oil outlet (S3) thereof is in communication with the first oil inlet (S1) thereof and the second oil inlet (S2) thereof, whichever has a greater pressure, and is disconnected from the second oil inlet (S2) thereof, whichever has a lesser pressure;
a second control unit (22) having a control port (K) connected to the oil outlet (S3) of the first control unit (21), an oil inlet (P1) connected to the first oil passage (H1), an oil outlet (AP 1) connected to the second oil passage (H2), and an oil outlet (T1) connected to the oil return port (T), the control port (K) being configured to control the second control unit (22) to switch between a first operating state in which the oil inlet (P1) thereof is in communication with the oil outlet (AP 1) thereof and the oil outlet (T1) thereof is disconnected and a second operating state in which the oil inlet (P1) thereof is disconnected and the oil outlet (AP 1) thereof is in communication with the oil outlet (T1) thereof, and a second operating state in which the second control unit (22) is in communication with the oil outlet (AP 1) thereof; and
a third control unit (25) having a control end (Y1), an oil inlet (P2) connected to the second oil passage (H2), an oil outlet (AP 2) connected to the third oil passage (H3), and an oil drain (T2) connected to the oil return port (T), the control end (Y1) being configured to control the third control unit (25) to switch between a first operating state and a second operating state, in the first operating state of the third control unit (25), the oil inlet (P2) thereof being in communication with the oil outlet (AP 2) thereof and the oil drain (T2) thereof being disconnected, in the second operating state of the third control unit (25), the oil inlet (P2) thereof being disconnected and the oil outlet (AP 2) thereof being in communication with the oil drain (T2) thereof;
the integrated control valve (2) further comprises a one-way valve (28), an oil inlet of the one-way valve (28) is connected with an oil discharge port (T2) of the third control unit (25) and an oil discharge port (T1) of the second control unit (22), an oil outlet of the one-way valve (28) is connected with the oil return port (T), the oil inlet ports further comprise a fourth oil inlet port (A3), the fourth oil inlet port (A3) is connected with the second oil duct (H2), the integrated control valve (2) further comprises a fourth control unit (23), the fourth oil inlet port (A3) is connected with the second oil duct (H2) through the fourth control unit (23), and the fourth control unit (23) is configured to control the on-off of the fourth oil inlet port (A3) and the second oil duct (H2).
2. The integrated control valve (2) of claim 1,
the first control unit (21) comprises a shuttle valve, and a first oil inlet (S1), a second oil inlet (S2) and an oil outlet (S3) of the first control unit (21) are respectively a first oil inlet, a second oil inlet and an oil outlet of the shuttle valve; and/or the presence of a gas in the gas,
the second control unit (22) comprises a hydraulic control reversing valve, and a control port (K), an oil inlet (P1), an oil outlet (AP 1) and an oil discharge port (T1) of the second control unit (22) are respectively a control port, an oil inlet, an oil outlet and an oil discharge port of the hydraulic control reversing valve; and/or the presence of a gas in the atmosphere,
the third control unit (25) comprises an electromagnetic directional valve, and a control end (Y1), an oil inlet (P2), an oil outlet (AP 2) and an oil drain port (T2) of the third control unit (25) are respectively the control end, the oil inlet, the oil outlet and the oil drain port of the electromagnetic directional valve.
3. The integrated control valve (2) according to claim 1, wherein the plurality of oil feed ports further includes a third oil feed port (P) connected with the first oil passage (H1).
4. The integrated control valve (2) according to claim 1, characterized in that an oil outlet (S3) of the first control unit (21) is connected with the first oil passage (H1).
5. The integrated control valve (2) according to claim 4, characterized by further comprising a pressure maintaining valve (29), the oil outlet (S3) of the first control unit (21) being connected with the first oil passage (H1) through the pressure maintaining valve (29).
6. Integrated control valve (2) according to claim 1, characterized in that the fourth control unit (23) is a solenoid directional valve.
7. Hydraulic system, characterized in that it has a first oil feed (W1) and a second oil feed (W2), the hydraulic system comprising:
the actuating element (4) is provided with a first working oil port (M1) and a second working oil port (M2), the first working oil port (M1) is connected with the first oil supply end (W1), and the second working oil port (M2) is connected with the second oil supply end (W2);
the balance valve (1) is arranged between the first oil supply end (W1) and a first working oil port (M1) of the actuating element (4), and is provided with a control port (X2) connected to the second oil supply end (W2);
a hydraulic brake (3) having a brake control port (R) for bringing the actuator (4) into or out of a braking state;
the integrated control valve (2) according to any one of claims 1 to 6, a first oil inlet port (A1) of the integrated control valve (2) being connected with the first oil supply end (W1), a second oil inlet port (A2) of the integrated control valve (2) being connected with the second oil supply end (W2), an oil outlet port (B) of the integrated control valve (2) being connected with a brake control port (R) of the hydraulic brake (3); and
a pressurized oil source configured to supply oil to the first oil supply end (W1), the second oil supply end (W2), and the plurality of oil feed ports of the integrated control valve (2).
8. A hydraulic system having a first oil feed (W1) and a second oil feed (W2), comprising:
the actuating element (4) is provided with a first working oil port (M1) and a second working oil port (M2), the first working oil port (M1) is connected with the first oil supply end (W1), and the second working oil port (M2) is connected with the second oil supply end (W2);
a balance valve (1) which is arranged between the first oil supply end (W1) and a first working oil port (M1) of the actuating element (4) and is provided with a control port (X2) connected to the second oil supply end (W2);
a hydraulic brake (3) having a brake control port (R) for bringing the actuator (4) into or out of a braking state;
a first oil passage (H1), a second oil passage (H2), a third oil passage (H3) and an oil discharge passage (H4);
a first control unit (21) which is provided with a first oil inlet (S1) connected with the first oil supply end (W1), a second oil inlet (S2) connected with the second oil supply end (W2) and an oil outlet (S3), and is configured to be connected with the oil outlet (S3) of the first control unit and the oil inlet (S1) of the second control unit under the condition that the oil inlet (S3) is connected with the oil inlet (S2) of the second control unit under the condition that the pressure is higher and the pressure is lower;
a second control unit (22) having a control port (K) connected to the oil outlet (S3) of the first control unit (21), an oil inlet (P1) connected to the first oil passage (H1), an oil outlet (AP 1) connected to the second oil passage (H2), and an oil outlet (T1) connected to the oil discharge passage (H4), the control port (K) being configured to control the second control unit (22) to switch between a first operating state in which its oil inlet (P1) is in communication with its oil outlet (AP 1) and its oil discharge port (T1) is disconnected, and a second operating state in which its oil inlet (P1) is disconnected and its oil outlet (AP 1) is in communication with its oil discharge port (T1), and a second operating state in which the second control unit (22) is configured to switch between its first operating state and its second operating state;
a third control unit (25) having a control end (Y1), an oil inlet (P2) connected to the second oil passage (H2), an oil outlet (AP 2) connected to the third oil passage (H3), and an oil outlet (T2) connected to the oil outlet passage (H4), wherein the control end (Y1) is configured to control the third control unit (25) to switch between a first operating state and a second operating state, in the first operating state of the third control unit (25), the oil inlet (P2) is communicated with the oil outlet (AP 2) thereof and the oil outlet (T2) thereof is disconnected, in the second operating state of the third control unit (25), the oil inlet (P2) is disconnected and the oil outlet (AP 2) thereof is communicated with the oil outlet (T2) thereof, and the third oil passage (H3) is connected to the brake control port (R) of the hydraulic brake (3); and
a pressure oil source configured to supply oil to the first oil supply end (W1), the second oil supply end (W2), and the first oil passage (H1);
the hydraulic system further comprises a one-way valve (28), an oil inlet of the one-way valve (28) is connected with an oil drain port (T2) of a third control unit (25) and an oil drain port (T1) of a second control unit (22), an oil outlet of the one-way valve (28) is connected with an oil return pipeline, the hydraulic system further comprises a fourth control unit (23), the pressure oil source comprises a second pressure stabilizing oil source (CS 2), the second pressure stabilizing oil source (CS 2) is connected with the second oil duct (H2) through the fourth control unit (23), and the fourth control unit (23) is configured to control the connection and disconnection of the second pressure stabilizing oil source (CS 2) and the second oil duct (H2).
9. The hydraulic system of claim 8,
the first control unit (21) comprises a shuttle valve, and a first oil inlet (S1), a second oil inlet (S2) and an oil outlet (S3) of the first control unit (21) are respectively a first oil inlet, a second oil inlet and an oil outlet of the shuttle valve; and/or the presence of a gas in the gas,
the second control unit (22) comprises a hydraulic control reversing valve, and a control port (K), an oil inlet (P1), an oil outlet (AP 1) and an oil drain port (T1) of the second control unit (22) are respectively a control port, an oil inlet, an oil outlet and an oil drain port of the hydraulic control reversing valve; and/or the presence of a gas in the atmosphere,
the third control unit (25) comprises an electromagnetic directional valve, and a control end (Y1), an oil inlet (P2), an oil outlet (AP 2) and an oil drain port (T2) of the third control unit (25) are respectively the control end, the oil inlet, the oil outlet and the oil drain port of the electromagnetic directional valve.
10. The hydraulic system according to claim 8, characterized in that the pressure oil source comprises a first pressure-stabilizing oil source (CS 1) connected to the first oil channel (H1).
11. The hydraulic system according to claim 8, characterized in that the pressure oil source is connected with the first oil channel (H1) through an oil outlet (S3) of the first control unit (21).
12. The hydraulic system as claimed in claim 11, characterized in that it further comprises a pressure maintaining valve (29), the oil outlet (S3) of the first control unit (21) being connected with the first oil channel (H1) through the pressure maintaining valve (29).
13. A hydraulic system as claimed in claim 8, characterized in that the fourth control unit (23) is a solenoid directional valve.
14. Hoisting device, characterized in that it comprises a hydraulic system according to any one of claims 7 to 13, the actuator (4) comprising a hydraulic motor, the first and second working oil ports (M1, M2) of the actuator (4) being the first and second working oil ports of the hydraulic motor.
15. A working machine, characterized by comprising a hydraulic system according to any one of claims 7-13.
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| CN202110608086.6A CN113309751B (en) | 2021-06-01 | 2021-06-01 | Integrated control valve, hydraulic system, winding device and engineering machinery |
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| CN202110608086.6A CN113309751B (en) | 2021-06-01 | 2021-06-01 | Integrated control valve, hydraulic system, winding device and engineering machinery |
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| CN113309751B true CN113309751B (en) | 2023-02-21 |
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| CN105217508A (en) * | 2014-10-30 | 2016-01-06 | 徐州重型机械有限公司 | A kind of hoist brake control system, method and hoisting crane |
| CN106744452A (en) * | 2016-12-20 | 2017-05-31 | 柳州柳工液压件有限公司 | Hoisting brake system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102040161A (en) * | 2010-04-01 | 2011-05-04 | 长沙中联重工科技发展股份有限公司 | System and method for preventing gliding during secondary lifting of crane |
| CN102491216A (en) * | 2011-12-14 | 2012-06-13 | 徐州重型机械有限公司 | Brake control valve unit and hosting hydraulic control system and crane having same |
| CN102616694A (en) * | 2012-03-29 | 2012-08-01 | 中联重科股份有限公司 | Hydraulic control loop of winding mechanism |
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