WO2021184848A1 - 一种液压操动机构及其控制阀 - Google Patents
一种液压操动机构及其控制阀 Download PDFInfo
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- WO2021184848A1 WO2021184848A1 PCT/CN2020/135965 CN2020135965W WO2021184848A1 WO 2021184848 A1 WO2021184848 A1 WO 2021184848A1 CN 2020135965 W CN2020135965 W CN 2020135965W WO 2021184848 A1 WO2021184848 A1 WO 2021184848A1
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- Prior art keywords
- valve
- oil
- port
- control valve
- opening
- Prior art date
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- 230000007246 mechanism Effects 0.000 title claims abstract description 96
- 238000004891 communication Methods 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 18
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 162
- 230000009471 action Effects 0.000 description 26
- 230000009286 beneficial effect Effects 0.000 description 12
- 238000000034 method Methods 0.000 description 10
- 230000004044 response Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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Classifications
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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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
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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
- 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
- F15B13/0401—Valve members; Fluid interconnections therefor
-
- 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
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
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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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
-
- 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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
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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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
Definitions
- the fast switch is the key equipment for power transmission, and the operating mechanism is the key component of the fast switch.
- the operating mechanism of quick switch is mainly divided into hydraulic operating mechanism, spring operating mechanism and pneumatic operating mechanism. Among them, hydraulic operating mechanism is widely used because of its high output power and high reliability.
- a hydraulic operating mechanism in the prior art is shown in Fig. 1 and includes a working cylinder 101.
- the working cylinder 101 has a piston cavity 102.
- the piston cavity 102 is sealed and slidingly fitted with a piston 107, and a piston rod 103 is fixed on the piston 107.
- the piston rod 103 passes through the working cylinder 101, and the protruding end of the piston rod 103 is connected to the moving end part of the main fracture through a transmission mechanism.
- the piston 107 and the piston rod 103 constitute a piston assembly, and the piston assembly connects the piston chamber 102 It is divided into a rod cavity and a rodless cavity; it also includes an accumulator 106, which is connected to the rod cavity through a high-pressure oil passage.
- the two-position three-way valve 104 is connected to the rodless cavity.
- the two-position three-way valve 104 is an electromagnetic control valve.
- the two-position three-way valve 104 has a port Z, a port P, and a port T.
- the port Z is connected to the rodless cavity.
- the port is connected with the accumulator 106, and the T port is connected with the oil tank 105.
- the spool of the two-position three-way valve 104 has two positions.
- the electromagnetic control valve of the hydraulic operating mechanism in the prior art has a long inherent response time, and in order to ensure that the electromagnet of the electromagnetic control valve has sufficient output force, its structure generally adopts a multi-stage amplification method, from the electrification of the electromagnet coil to the Moving iron core action, primary valve action, secondary valve action, main valve action, and finally hydraulic operating mechanism action, the inherent action time is longer. At this time, the conventional hydraulic operating mechanism can no longer meet the requirements of the action time of the fast switch.
- Hydraulic operating mechanism including:
- the working cylinder includes a rod cavity and a rodless cavity, and the rod cavity is connected with a high-pressure oil source;
- Control valve including high-pressure oil port, working oil port and low-pressure oil port;
- the high-pressure oil port is in communication with a high-pressure oil source, the working oil port is in communication with the rodless cavity, and the low-pressure oil port is in communication with an oil tank;
- the control valve also includes a closing control valve unit, an opening control valve unit, and a driving part;
- Both the closing control valve unit and the opening control valve unit include a valve body, a spool and a driving part;
- the valve body is provided with an oil inlet and an oil outlet, as well as an oil inlet and an oil outlet.
- the oil inlet and the oil outlet are respectively connected with the oil inlet and the oil outlet, and the oil inlet and the oil outlet There are valve ports between the channels;
- the valve core is movably arranged in the valve body and used to block and open the valve port;
- a spool spring is provided in the valve body, and the spool spring is used to apply force to the spool to block the valve port;
- the oil inlet of the closing control valve unit forms the high-pressure oil port
- the oil outlet of the opening control valve unit forms the low-pressure oil port
- the oil outlet of the closing control valve unit and the oil inlet of the opening control valve unit ⁇ forms the working oil port
- the driver corresponding to the valve core, is used to drive the valve core to open the valve port;
- the driving member is connected with a repulsive force mechanism, and the repulsive force mechanism is used to drive the driving member to move.
- the beneficial effect is that the opening and closing of the corresponding control valve unit is directly controlled by the repulsion mechanism to realize the on and off of the oil passage of the hydraulic operating mechanism, thereby driving the working cylinder to perform opening or closing operations, reducing the action of the intermediate multi-stage valve Link, shorten the response time of the components, can meet the requirements of the opening and closing action time of the fast switch of the power grid system, reduce the short-circuit current of the circuit breaker opening, and improve the safety of the power grid system.
- valve port is formed by an opening at one end of the oil inlet passage away from the high-pressure oil port;
- the valve body is provided with a valve cavity, and the valve core is slidingly sealed and arranged in the valve cavity;
- the side of the spool facing away from the valve port is provided with a movable chamber, which is used to provide a movable space for the spool, and a bypass oil passage is provided between the movable chamber and the oil inlet.
- the beneficial effect is that the movable chamber on the side of the valve core facing away from the valve port will not become a dead space, thereby ensuring the flexibility of the valve core movement.
- the driving member is slidably sealed and assembled on the valve body and penetrates into the oil inlet passage.
- the beneficial effect is that the drive member penetrates into the oil passage to drive the valve core to move, which reduces the opening on the valve body, not only reduces the processing procedures, but also better guarantees the sealing performance of the valve body.
- the driving part and the valve core are separated from each other;
- the repulsion mechanism includes a repulsion disc and a repulsion disc return spring. After the repulsion disc drives the driving element to push the valve core to open, the repulsion disc return spring is used to drive the repulsion disc to reset, so that the driving element releases the push of the valve core.
- the beneficial effect is that the driving part and the valve core are separated from each other, so that the repulsive force mechanism can drive the driving part to release the pushing of the valve core.
- a sealing spherical surface is provided on the valve core, and the sealing spherical surface is used for sealingly matching with the valve port.
- the high-pressure oil port is used to communicate with the high-pressure oil source, the working oil port is used to communicate with the rodless cavity, and the low-pressure oil port is used to communicate with the oil tank;
- Both the closing control valve unit and the opening control valve unit include a valve body, a spool and a driving part;
- the valve core is movably arranged in the valve body and used to block and open the valve port;
- a spool spring is provided in the valve body, and the spool spring is used to apply force to the spool to block the valve port;
- the driving member is connected with a repulsive force mechanism, and the repulsive force mechanism is used to drive the driving member to move.
- the beneficial effect is that the opening and closing of the corresponding control valve unit is directly controlled by the repulsion mechanism to realize the on and off of the oil passage of the hydraulic operating mechanism, thereby driving the working cylinder to perform opening or closing operations, reducing the action of the intermediate multi-stage valve Link, shorten the response time of the components, can meet the requirements of the opening and closing action time of the fast switch of the power grid system, reduce the short-circuit current of the circuit breaker opening, and improve the safety of the power grid system.
- valve port is formed by an opening at one end of the oil inlet passage away from the high-pressure oil port;
- the valve body is provided with a valve cavity, and the valve core is slidingly sealed and arranged in the valve cavity;
- the side of the spool facing away from the valve port is provided with a movable chamber, which is used to provide a movable space for the spool, and a bypass oil passage is provided between the movable chamber and the oil inlet.
- the beneficial effect is that the movable chamber on the side of the valve core facing away from the valve port will not become a dead space, thereby ensuring the flexibility of the valve core movement.
- the driving member is slidably sealed and assembled on the valve body and penetrates into the oil inlet passage.
- the beneficial effect is that the drive member penetrates into the oil passage to drive the valve core to move, which reduces the opening on the valve body, not only reduces the processing procedures, but also better guarantees the sealing performance of the valve body.
- the driving part and the valve core are separated from each other;
- the repulsion mechanism includes a repulsion disc and a repulsion disc return spring. After the repulsion disc drives the driving element to push the valve core to open, the repulsion disc return spring is used to drive the repulsion disc to reset, so that the driving element releases the push of the valve core.
- the beneficial effect is that the driving part and the valve core are separated from each other, so that the repulsive force mechanism can drive the driving part to release the pushing of the valve core.
- a sealing spherical surface is provided on the valve core, and the sealing spherical surface is used for sealingly matching with the valve port.
- Figure 1 is a schematic structural diagram of a hydraulic operating mechanism in the prior art
- Fig. 3 is a schematic diagram of the structure of the closing control valve unit in Fig. 2;
- Fig. 4 is a schematic diagram of the structure of the opening control valve unit in Fig. 2.
- Figure 1 101-working cylinder; 102-piston chamber; 103-piston rod; 104-two-position three-way valve; 105-fuel tank; 106-accumulator; 107-piston;
- first and “second” and other relational terms are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply one of these entities or operations. There is any such actual relationship or order between.
- the terms “include”, “include” or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes those that are not explicitly listed Other elements of, or also include elements inherent to this process, method, article or equipment. If there are no more restrictions, the element defined by the sentence “including a" does not exclude the existence of other identical elements in the process, method, article, or equipment that includes the element.
- the hydraulic operating mechanism includes a working cylinder 1.
- the working cylinder 1 has a piston cavity.
- the piston 3 is sealed and slidingly fitted in the piston cavity.
- a piston rod 2 is fixed on the piston 3.
- the piston rod 2 is penetrated by the working cylinder 1.
- the end of the piston rod 2 extending out of the working cylinder 1 is drivingly connected to the moving end portion 20 of the main fracture through a transmission mechanism; it also includes a control valve, which includes a closing control valve unit and an opening control valve unit.
- the piston 3 and the piston rod 2 constitute a piston assembly, and the piston assembly divides the piston cavity into a rod cavity and a rodless cavity.
- an accumulator 4 is connected to the rod cavity through an oil passage, and the accumulator 4 is connected to a closing control valve unit through the oil passage.
- the closing control valve unit includes a closing valve body 11, which has a closing valve cavity.
- the closing valve body 11 is provided with a closing oil inlet 22 and a closing oil outlet 21.
- the closing oil passage 22 communicates with the closing valve cavity and the accumulator 4;
- the closing oil passage 21 communicates with the closing valve cavity and the rodless cavity, and the oil outlet communicating with the closing oil passage 21 and the rodless cavity constitutes a working oil port.
- the closing oil inlet passage 22 and the closing oil outlet passage 21 are communicated through the closing valve cavity.
- the accumulator 4 constitutes a high-pressure oil source.
- a closing valve core 24 and a third return spring 23 are arranged in the closing valve cavity, and the third return spring 23 constitutes a valve core spring.
- the closing valve core 24 includes a closing valve ball 25.
- the closing valve ball 25 is arranged on the side of the closing valve core 24 away from the third return spring 23.
- the closing valve ball 25 has a sealing spherical surface.
- the third return spring 23 is pressed against the closing valve core 24. , So that the closing valve ball 25 and the closing valve port 33 are sealed and matched, and the closing oil inlet 22 and the closing oil outlet 21 are cut off.
- a closing baffle 10 is provided under the closing valve cavity, and the closing baffle 10 is used to block the closing valve cavity.
- a closing movable chamber 31 is provided under the closing valve core 24, and a closing bypass oil passage 9 is also provided in the closing valve body 11.
- the closing bypass oil passage 9 communicates with the closing oil inlet 22 and the closing valve.
- the gate movable chamber 31 prevents the closing movable chamber 31 below the closing valve core 24 from becoming a dead space, thereby ensuring that the closing valve core 24 operates flexibly.
- the closing oil inlet 22 has a closing valve port 33 and a closing oil inlet.
- the closing oil inlet forms a high pressure oil port, and the closing oil inlet communicates with the accumulator.
- the closing valve port 33 communicates with the closing valve cavity.
- the center line of the closing valve port 33 coincides with the center line of the closing valve cavity.
- the closing valve body is sealed and slidingly fitted with a closing drive rod 8, and the lower end of the closing drive rod 8 passes through Closing valve port 33.
- the closing drive rod 8 drives the closing valve ball 25 to move downward, so as to realize the communication between the closing oil inlet 22 and the closing oil outlet 21.
- the closing driving rod 8 constitutes a closing driving member.
- the closing drive rod 8 and the closing repulsive force mechanism 5 are both provided with connecting flanges, the closing repulsive force mechanism 5 is fixedly connected to the closing drive rod 8 through the closing flange structure 7, and the closing repulsive force mechanism 5 It includes the repulsion plate and the first return spring 6.
- the first return spring 6 can ensure that the repulsion plate returns to its original position after action, and the initial position of each action is consistent, which is beneficial to ensure the stability of the product action parameters.
- the first return spring 6 constitutes a repulsive disc return spring.
- the gate opening control valve unit includes a gate valve body 15, which has a gate valve cavity.
- the gate valve body 15 is provided with an opening oil inlet 27 and an opening oil outlet 26.
- the opening oil inlet passage 27 communicates with the opening valve cavity and the rodless cavity;
- the opening oil passage 26 communicates with the closing valve cavity and the oil tank 14, and the oil outlet communicating with the opening oil passage and the oil tank constitutes a low pressure oil port.
- the opening oil inlet passage 27 and the opening oil outlet passage 26 are communicated through the opening valve cavity.
- An opening valve core 29 and a fourth return spring 28 are arranged in the opening valve cavity, and the fourth return spring 28 constitutes a valve core spring.
- the gate valve core 29 includes a gate valve ball 30.
- the gate valve ball 30 is arranged on the side of the gate valve core 29 away from the fourth return spring 28.
- the gate valve ball 30 has a sealing spherical surface.
- the fourth return spring 28 is pressed against the gate valve core 29. , So that the opening valve ball 30 and the opening valve port 34 are sealed and matched, and then the opening oil inlet 27 and the opening oil outlet 26 are cut off.
- an opening baffle 13 is provided under the opening valve cavity, and the opening baffle 13 is used to block the opening valve cavity.
- the opening driving rod 16 and the opening repulsive force mechanism 19 are both provided with connecting flanges.
- the opening repulsive force mechanism 19 is fixedly connected to the opening driving rod 16 through the opening flange structure 17.
- the opening repulsive force mechanism 19 includes the repulsion plate and the second return spring 18.
- the second return spring 18 can ensure that the repulsion plate returns to its original position after action, and the initial position is consistent every time it is actuated, which is beneficial to ensure the stability of the product action parameters.
- the second return spring 18 constitutes a repulsive disc return spring.
- both the closing repulsive force mechanism and the opening repulsive force mechanism constitute a driving device.
- the repulsive force mechanism is an existing mature product. It stops by itself.
- the response time of the repulsive force mechanism to drive the working cylinder is about 1/5 to 1/4 of the response time of the traditional solenoid control valve, and the output force is large, which can completely overcome the hydraulic resistance. Directly control the on and off of the oil passage of the hydraulic operating mechanism.
- the P cavity is connected to the accumulator 4, and high pressure oil is always in it.
- the Z cavity is connected to the rodless cavity, and it is connected to the P cavity in the closing position, which is high pressure oil; when it is in the opening position, it is connected to the T cavity and is low pressure oil.
- the T cavity is connected to the oil tank, which is always low pressure oil.
- the closing repulsive force mechanism 5 acts to drive the closing driving rod 8 to open the closing valve ball 25, the closing oil inlet 22 and the closing oil outlet 21 are connected, and the valve in the P cavity The hydraulic oil enters the Z cavity. At this time, both the P cavity and the Z cavity are high pressure oil. Since the piston area of the rodless cavity is larger than the piston area of the rod cavity, the piston rod 2 moves to the rod cavity under the action of the pressure difference, thereby driving The moving end part 20 of the main fracture completes the closing operation, and then the closing repulsive force mechanism 5 returns to the original position under the action of the first return spring 6.
- the opening repulsive force mechanism 19 acts to drive the opening drive rod 16 to open the opening valve ball 30, the opening inlet oil passage 27 and the opening outlet oil passage 26 are connected, and the hydraulic oil in the Z cavity enters T At this time, the P cavity is high pressure oil, and the Z cavity is low pressure oil. Therefore, the piston rod 2 moves to the rodless cavity under the action of the pressure difference of the piston rod 2, thereby driving the moving end part 20 of the main fracture to complete the opening operation, and then the opening repulsion mechanism 19 returns to its original position under the action of the second return spring 18, completing the opening and closing operation.
- the closing drive rod 8 drives the closing spool 24 from above the closing spool 24, and the opening drive rod 16 drives the opening spool 29 from above the opening spool 29.
- the closing driving rod is sealed and slidingly assembled on the closing valve body at the lower part of the closing spool, and the closing driving rod passes through the third return spring and is fixedly connected to the closing spool; at the same time, the opening driving rod is sealed and sliding It is assembled on the opening valve body at the lower part of the opening valve core, and the opening driving rod passes through the fourth return spring and is fixedly connected with the opening valve core.
- the closing valve core 24 includes a closing valve ball 25, and the closing valve core 24 cuts off the closing oil inlet 22 and closing oil outlet 21 through the closing valve ball 25; the opening valve core 29 includes the opening valve ball 30.
- the opening valve core 29 cuts off the opening inlet oil passage 27 and the opening outlet oil passage 26 through the opening valve ball 30.
- the closing valve core is provided on the side facing away from the third return spring. Closing cone structure, the closing valve core is sealed and matched with the closing valve opening through the opening cone structure; at the same time, the side of the opening spool facing away from the fourth return spring is provided with an opening cone structure, and the opening spool passes through the opening cone. The structure is matched with the opening of the gate valve.
- the opening driving rod 16 and the closing driving rod 8 are both provided with connecting flanges, and the two driving rods are respectively fixedly connected with the corresponding repulsive force mechanism through the connecting flange.
- the end of the opening driving rod and the closing driving rod away from the corresponding valve body is provided with a threaded hole along its radial direction.
- the bolt passes through the through hole and is screwed on the threaded hole to realize the fixed connection between the opening driving rod and the closing driving rod and the corresponding repulsive force mechanism.
- the opening driving rod and the closing driving rod and the corresponding repulsive force mechanism may also be connected by threads.
- the closing bypass oil passage 9 is provided in the closing valve body 11, so that the closing valve cavity under the closing valve core 24 will not become a dead space, and the opening valve body 15
- the opening bypass oil passage 12 is provided inside, so that the opening valve cavity under the opening valve core 29 will not become a dead space.
- the closing bypass oil passage and the opening bypass oil passage are not provided.
- the elasticity of the third return spring and the fourth return spring are both greater than the pressure of the P cavity.
- the closing valve cavity below the closing valve core is the closing cavity.
- the closing cavity is communicated with the closing valve body to ensure that the closing cavity is not It will become a dead space, and the opening valve cavity under the opening valve core is the opening cavity, and the opening cavity is connected to the body of the opening valve to ensure that the opening cavity will not become a dead space.
- control valve of the hydraulic operating mechanism of the present application has the same structure as the control valve described in any one of the above specific embodiments 1-5 of the hydraulic operating mechanism. I won't repeat them here.
- the control valve of the hydraulic operating mechanism includes a high-pressure oil port, a working oil port, and a low-pressure oil port; the control valve also includes a closing control valve unit, an opening control valve unit and a driving part;
- the closing control valve unit includes a valve body, a valve core and a driving part; the valve body is provided with an oil inlet, an oil outlet, and an oil inlet and an oil outlet.
- the oil inlet and the oil outlet are respectively Connected with the oil inlet and outlet, a valve port is arranged between the oil inlet and the oil outlet;
- the valve core is movably arranged in the valve body for blocking and opening the valve port;
- the valve body is provided with a valve core Spring;
- the oil inlet of the closing control valve unit forms the high-pressure oil port,
- the oil outlet of the opening control valve unit forms the low-pressure oil port, and the oil inlet of the opening and closing control valve unit forms a working oil port;
- the driving part is used to drive the valve core to move to open the valve port;
- the driving part is connected with a repulsive force mechanism, and the repulsive force mechanism is used to drive the driving part to move.
- the repulsion mechanism directly controls the opening and closing of the corresponding control valve unit to realize the on and off of the oil passage of the hydraulic operating mechanism, thereby driving the working cylinder to open or close, reducing the action links of the intermediate multi-stage valve and shortening
- the response time of the component can meet the opening and closing action time requirements of the fast switch of the power grid system, reduce the short-circuit current of the circuit breaker opening, and improve the safety of the power grid system.
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Abstract
Description
Claims (10)
- 液压操动机构,包括:工作缸,工作缸包括有杆腔和无杆腔,有杆腔连接有高压油源;控制阀,包括高压油口、工作油口和低压油口;所述高压油口与高压油源连通,工作油口与所述无杆腔连通,低压油口与油箱连通;其中,所述控制阀还包括合闸控制阀单元、分闸控制阀单元及驱动件;合闸控制阀单元和分闸控制阀单元均包括阀体、阀芯和驱动件;阀体,其上设有进油口、出油口,还设有进油道和出油道,进油道和出油道分别与进油口和出油口连通,进油道和出油道之间设有阀口;阀芯,活动设置在阀体内,用于封堵和打开所述阀口;阀体内设有阀芯弹簧,阀芯弹簧用于对阀芯施加封堵阀口的作用力;合闸控制阀单元的进油口形成所述高压油口,分闸控制阀单元的出油口形成所述低压油口,合闸控制阀单元的出油口和分闸控制阀单元的进油口形成所述工作油口;驱动件,对应于阀芯设置,用于带动阀芯动作以打开所述阀口;所述驱动件连接有斥力机构,斥力机构用于驱动所述驱动件动作。
- 根据权利要求1所述的液压操动机构,其中,所述阀口由进油道远离高压油口的一端端部开口形成;阀体内设有阀腔,阀芯滑动密封设置在阀腔中;阀芯背向阀口的一侧设有活动腔室,活动腔室用于为阀芯提供活动空间,活动腔室与进油道之间设有旁路油道。
- 根据权利要求2所述的液压操动机构,其中,所述驱动件滑动密封装配在阀体上且穿入所述进油道内。
- 根据权利要求1或2或3所述的液压操动机构,其中,所述驱动件与阀芯相互分离;所述斥力机构包括斥力盘和斥力盘复位弹簧,在斥力盘带动驱动件顶推阀芯打开后,斥力盘复位弹簧用于带动斥力盘复位,以使驱动件解除对阀芯顶推。
- 根据权利要求1或2或3所述的液压操动机构,其中,所述阀芯上设有密封球面,密封球面用于与阀口密封配合。
- 液压操动机构的控制阀,包括高压油口、工作油口和低压油口;高压油口用于与高压油源连通,工作油口用于与无杆腔连通,低压油口用于与油箱连通;其中,还包括合闸控制阀单元、分闸控制阀单元及驱动件;合闸控制阀单元和分闸控制阀单元均包括阀体、阀芯和驱动件;阀体,其上设有进油口、出油口,还设有进油道和出油道,进油道和出油道分别与进油口和出油口连通,进油道和出油道之间设有阀口;阀芯,活动设置在阀体内,用于封堵和打开所述阀口;阀体内设有阀芯弹簧,阀芯弹簧用于对阀芯施加封堵阀口的作用力;合闸控制阀单元的进油口形成所述高压油口,分闸控制阀单元的出油口形成所述低压油口,合闸控制阀单元的出油口和分闸控制阀单元的进油口形成所述工作油口;驱动件,对应于阀芯设置,用于带动阀芯动作以打开所述阀口;所述驱动件连接有斥力机构,斥力机构用于驱动所述驱动件动作。
- 根据权利要求6所述的液压操动机构的控制阀,其中,所述阀口由进油道远离高压油口的一端端部开口形成;阀体内设有阀腔,阀芯滑动密封设置在阀腔中;阀芯背向阀口的一侧设有活动腔室,活动腔室用于为阀芯提供活动空间,活动腔室与进油道之间设有旁路油道。
- 根据权利要求7所述的液压操动机构的控制阀,其中,所述驱动件滑动密封装配在阀体上且穿入所述进油道内。
- 根据权利要求6或7或8所述的液压操动机构的控制阀,其中,所述驱动件与阀芯相互分离;所述斥力机构包括斥力盘和斥力盘复位弹簧,在斥力盘带动驱动件顶推阀芯打开后,斥力盘复位弹簧用于带动斥力盘复位,以使驱动件解除对阀芯顶推。
- 根据权利要求6或7或8所述的液压操动机构的控制阀,其中,所述阀芯上设有密封球面,密封球面用于与阀口密封配合。
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