CN112324720B - Hydraulic operating mechanism and control valve thereof - Google Patents

Hydraulic operating mechanism and control valve thereof Download PDF

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Publication number
CN112324720B
CN112324720B CN202011264273.9A CN202011264273A CN112324720B CN 112324720 B CN112324720 B CN 112324720B CN 202011264273 A CN202011264273 A CN 202011264273A CN 112324720 B CN112324720 B CN 112324720B
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China
Prior art keywords
valve
oil
port
control valve
opening
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CN202011264273.9A
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Chinese (zh)
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CN112324720A (en
Inventor
钟建英
雷琴
刘煜
刘宇
李海文
韩国辉
谭盛武
江经华
段晓辉
孙英杰
何保营
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State Grid Corp of China SGCC
Pinggao Group Co Ltd
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State Grid Corp of China SGCC
Pinggao Group Co Ltd
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Priority to PCT/CN2020/135965 priority Critical patent/WO2021184848A1/en
Publication of CN112324720A publication Critical patent/CN112324720A/en
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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
    • 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
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Driven Valves (AREA)

Abstract

The invention relates to a hydraulic operating mechanism and a control valve thereof. The control valve of the hydraulic operating mechanism comprises a high-pressure oil port, a working oil port and a low-pressure oil port; the control valve also comprises a closing control valve unit, an opening control valve unit and a driving piece; the switching-on and switching-off control valve units comprise valve bodies, valve cores and driving pieces; the valve body is provided with an oil inlet, an oil outlet, an oil inlet channel and an oil outlet channel, the oil inlet channel and the oil outlet channel are respectively communicated with the oil inlet and the oil outlet, and a valve port is arranged between the oil inlet channel and the oil outlet channel; the valve core is movably arranged in the valve body and used for plugging and opening the valve port; a valve core spring is arranged in the valve body; the high-pressure oil port is formed at the oil inlet of the closing control valve unit, the low-pressure oil port is formed at the oil outlet of the opening control valve unit, and the working oil ports are formed at the oil inlets of the opening control valve unit and the closing control valve unit; the driving piece is used for driving the valve core to move so as to open the valve port; the driving piece is connected with a repulsion mechanism, and the repulsion mechanism is used for driving the driving piece to act.

Description

Hydraulic operating mechanism and control valve thereof
Technical Field
The invention relates to a hydraulic operating mechanism and a control valve thereof.
Background
The quick switch is a key device for power transmission, and the operating mechanism is a key component of the quick switch. The operating mechanism of the quick switch is mainly divided into a hydraulic operating mechanism, a spring operating mechanism, a pneumatic operating mechanism and the like, wherein the hydraulic operating mechanism is widely applied by the characteristics of large output power, high reliability and the like.
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, a piston 107 is hermetically and slidably assembled in the piston cavity 102, a piston rod 103 is fixed on the piston 107, the piston rod 103 penetrates out of the working cylinder 101, and an extending end of the piston rod 103 is in transmission connection with a movable end portion of a main fracture through a transmission mechanism, wherein the piston 107 and the piston rod 103 form a piston assembly, and the piston assembly divides the piston cavity 102 into a rod cavity and a rodless cavity; the energy accumulator 106 is further included, and the energy accumulator 106 is connected with the rod cavity through a high-pressure oil passage. The rodless cavity is connected with a two-position three-way valve 104, the two-position three-way valve 104 is an electromagnetic control valve, the two-position three-way valve 104 is provided with a Z port, a P port and a T port, the Z port is connected with the rodless cavity, the P port is connected with an energy accumulator 106, and the T port is connected with an oil tank 105. A valve core of the two-position three-way valve 104 has two positions, when the valve core is in the left position, the Z port is communicated with the P port, high-pressure oil in the energy accumulator 106 flows into the rodless cavity to push the piston assembly to move towards the rod cavity, and the piston rod 103 drives the main fracture to be switched on; when the valve core is in the right position, the Z port is communicated with the T port, hydraulic oil in the rodless cavity flows back to the oil tank 105, high-pressure oil in the rod cavity pushes the piston assembly to move towards the rodless cavity, and the piston rod 103 drives the main fracture to be opened.
The electromagnetic control valve of the hydraulic operating mechanism in the prior art has long inherent response time, and in order to ensure that the electromagnet of the electromagnetic control valve has enough output force, the structure generally adopts a multi-stage amplification mode, and the inherent action time is long from the electrification of an electromagnet coil to the action of a movable iron core, the action of a first-stage valve, the action of a second-stage valve, the action of a main valve and finally the action of the hydraulic operating mechanism. At this time, the conventional hydraulic operating mechanism cannot meet the action time requirement of the quick switch.
Disclosure of Invention
The invention aims to provide a hydraulic operating mechanism to solve the technical problem that the hydraulic operating mechanism in the prior art cannot meet the requirement of the action time of a quick switch; the invention also aims to provide a control valve of the hydraulic operating mechanism, so as to solve the technical problem that the hydraulic operating mechanism in the prior art cannot meet the requirement of quick opening and closing action time.
In order to achieve the purpose, the technical scheme of the hydraulic operating mechanism is as follows:
the hydraulic pressure operating mechanism includes:
the working cylinder comprises a rod cavity and a rodless cavity, and the rod cavity is connected with a high-pressure oil source;
the control valve comprises a high-pressure oil port, a working oil port and a low-pressure oil port;
the high-pressure oil port is communicated with a high-pressure oil source, the working oil port is communicated with the rodless cavity, and the low-pressure oil port is communicated with an oil tank;
the control valve also comprises a closing control valve unit and an opening control valve unit;
the closing control valve unit and the opening control valve unit both comprise valve bodies, valve cores and driving pieces;
the valve body is provided with an oil inlet, an oil outlet, an oil inlet channel and an oil outlet channel, the oil inlet channel and the oil outlet channel are respectively communicated with the oil inlet and the oil outlet, and a valve port is arranged between the oil inlet channel and the oil outlet channel;
the valve core is movably arranged in the valve body and used for plugging and opening the valve port;
a valve core spring is arranged in the valve body and used for applying acting force for plugging the valve port to the valve core;
the high-pressure oil port is formed at the oil inlet of the closing control valve unit, the low-pressure oil port is formed at the oil outlet of the opening control valve unit, and the working oil ports are formed at the oil outlet of the closing control valve unit and the oil inlet of the opening control valve unit;
the driving piece is arranged corresponding to the valve core and is used for driving the valve core to move so as to open the valve port;
the driving piece is connected with a repulsion mechanism, and the repulsion mechanism is used for driving the driving piece to act.
The beneficial effects are that: the repulsion mechanism directly controls the opening and closing of the corresponding control valve units to realize the on-off of the oil duct of the hydraulic operating mechanism, so that the working cylinder is driven to perform the opening or closing operation, the action links of the middle multi-stage valve are reduced, the response time of elements is shortened, the opening and closing action time requirement of the quick switch of the power grid system can be met, the short-circuit current of the breaker is reduced, and the safety of the power grid system is improved.
Furthermore, the valve port is formed by an opening at one end part of the oil inlet channel far away from the high-pressure oil port;
a valve cavity is arranged in the valve body, and the valve core is arranged in the valve cavity in a sliding and sealing manner;
one side of the valve core, which is back to the valve port, is provided with a movable cavity, the movable cavity is used for providing a movable space for the valve core, and a bypass oil duct is arranged between the movable cavity and the oil inlet duct.
The beneficial effects are that: the movable cavity on the side of the valve core, which is back to the valve port, cannot become a dead cavity, and the flexibility of the action of the valve core is further ensured.
Furthermore, the driving piece is assembled on the valve body in a sliding and sealing mode and penetrates into the oil inlet channel.
The beneficial effects are that: the driving piece penetrates into the oil inlet channel to drive the valve core to act, so that the number of holes in the valve body is reduced, the machining procedures are reduced, and the sealing performance of the valve body can be better ensured.
Further, the driving piece and the valve core are mutually separated;
the repulsion mechanism comprises a repulsion plate and a repulsion plate reset spring, and after the repulsion plate drives the driving piece to push the valve core to be opened, the repulsion plate reset spring is used for driving the repulsion plate to reset so that the driving piece releases the pushing of the valve core.
The beneficial effects are that: the driving piece and the valve core are arranged in a mutually separated mode, so that the repulsion mechanism can drive the driving piece to release the pushing of the valve core.
Furthermore, a sealing spherical surface is arranged on the valve core and is used for being in sealing fit with the valve port.
The beneficial effects are that: through sealed spherical surface and the sealed cooperation of valve port, sealed effect is better.
In order to achieve the purpose, the technical scheme of the control valve of the hydraulic operating mechanism is as follows:
the control valve of the hydraulic operating mechanism comprises a high-pressure oil port, a working oil port and a low-pressure oil port;
the high-pressure oil port is communicated with a high-pressure oil source, the working oil port is communicated with the rodless cavity, and the low-pressure oil port is communicated with an oil tank;
the device also comprises a closing control valve unit and an opening control valve unit;
the closing control valve unit and the opening control valve unit both comprise valve bodies, valve cores and driving pieces;
the valve body is provided with an oil inlet, an oil outlet, an oil inlet channel and an oil outlet channel, the oil inlet channel and the oil outlet channel are respectively communicated with the oil inlet and the oil outlet, and a valve port is arranged between the oil inlet channel and the oil outlet channel;
the valve core is movably arranged in the valve body and used for plugging and opening the valve port;
a valve core spring is arranged in the valve body and used for applying acting force for plugging the valve port to the valve core;
the high-pressure oil port is formed at the oil inlet of the closing control valve unit, the low-pressure oil port is formed at the oil outlet of the opening control valve unit, and the working oil ports are formed at the oil outlet of the closing control valve unit and the oil inlet of the opening control valve unit;
the driving piece is arranged corresponding to the valve core and is used for driving the valve core to move so as to open the valve port;
the driving piece is connected with a repulsion mechanism, and the repulsion mechanism is used for driving the driving piece to act.
The beneficial effects are that: the repulsion mechanism directly controls the opening and closing of the corresponding control valve units to realize the on-off of the oil duct of the hydraulic operating mechanism, so that the working cylinder is driven to perform the opening or closing operation, the action links of the middle multi-stage valve are reduced, the response time of elements is shortened, the opening and closing action time requirement of the quick switch of the power grid system can be met, the short-circuit current of the breaker is reduced, and the safety of the power grid system is improved.
Furthermore, the valve port is formed by an opening at one end part of the oil inlet channel far away from the high-pressure oil port;
a valve cavity is arranged in the valve body, and the valve core is arranged in the valve cavity in a sliding and sealing manner;
one side of the valve core, which is back to the valve port, is provided with a movable cavity, the movable cavity is used for providing a movable space for the valve core, and a bypass oil duct is arranged between the movable cavity and the oil inlet duct.
The beneficial effects are that: the movable cavity on the side of the valve core, which is back to the valve port, cannot become a dead cavity, and the flexibility of the action of the valve core is further ensured.
Furthermore, the driving piece is assembled on the valve body in a sliding and sealing mode and penetrates into the oil inlet channel.
The beneficial effects are that: the driving piece penetrates into the oil inlet channel to drive the valve core to act, so that the number of holes in the valve body is reduced, the machining procedures are reduced, and the sealing performance of the valve body can be better ensured.
Further, the driving piece and the valve core are mutually separated;
the repulsion mechanism comprises a repulsion plate and a repulsion plate reset spring, and after the repulsion plate drives the driving piece to push the valve core to be opened, the repulsion plate reset spring is used for driving the repulsion plate to reset so that the driving piece releases the pushing of the valve core.
The beneficial effects are that: the driving piece and the valve core are arranged in a mutually separated mode, so that the repulsion mechanism can drive the driving piece to release the pushing of the valve core.
Furthermore, a sealing spherical surface is arranged on the valve core and is used for being in sealing fit with the valve port.
The beneficial effects are that: through sealed spherical surface and the sealed cooperation of valve port, sealed effect is better.
Drawings
FIG. 1 is a schematic structural diagram of a hydraulic actuator in the prior art;
fig. 2 is a schematic structural diagram of a hydraulic operating mechanism 1 according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a closing control valve unit in fig. 2;
FIG. 4 is a schematic structural diagram of the opening control valve unit in FIG. 2;
in fig. 1: 101-a working cylinder; 102-a piston cavity; 103-a piston rod; 104-two-position three-way valve; 105-a fuel tank; 106-an accumulator; 107-piston;
in fig. 2 to 4: 1-a working cylinder; 2-a piston rod; 3-a piston; 4-an accumulator; 5-closing repulsion force mechanism; 6-a first return spring; 7-a closing flange structure; 8-closing drive rod; 9-closing a bypass oil duct; 10-closing a gate; 11-a switching-on valve body; 12-a brake-separating bypass oil duct; 13-opening a gate baffle; 14-a fuel tank; 15-opening valve body; 16-a brake-separating driving rod; 17-opening flange structure; 18-a second return spring; 19-brake separating repulsion force mechanism; 20-a moving end portion; 21-closing oil outlet channel; 22-closing oil inlet channel; 23-a third return spring; 24-a closing valve core; 25-closing valve ball; 26-separating the brake oil outlet channel; 27-opening oil inlet channel; 28-a fourth return spring; 29-opening valve core; 30-a separating valve ball; 31-closing the movable chamber; 32-a separating gate movable chamber; 33-closing valve port; 34-opening the valve port.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. Furthermore, the terms "upper" and "lower" are based on the orientation and positional relationship shown in the drawings and are only for convenience of description of the present invention, and do not indicate that the referred device or component must have a specific orientation, and thus, should not be construed as limiting the present invention.
The features and properties of the present invention are described in further detail below with reference to examples.
The specific embodiment 1 of the hydraulic operating mechanism of the invention:
as shown in fig. 2, the hydraulic operating mechanism includes a working cylinder 1, the working cylinder 1 has a piston cavity, a piston 3 is assembled in the piston cavity in a sealing and sliding manner, a piston rod 2 is fixed on the piston 3, the piston rod 2 penetrates out of the working cylinder 1, and one end of the piston rod 2 extending out of the working cylinder 1 is in transmission connection with a movable end part 20 of the main fracture through a transmission mechanism; the control valve comprises a closing control valve unit and an opening control valve unit. Wherein the piston 3 and the piston rod 2 constitute a piston assembly which divides the piston chamber into a rod chamber and a rodless chamber.
In this embodiment, the rod cavity is connected to an energy accumulator 4 through an oil passage, and the energy accumulator 4 is connected to the closing control valve unit through an oil passage. As shown in fig. 2 and 3, the closing control valve unit includes a closing valve body 11, the closing valve body 11 has a closing valve cavity, the closing valve body 11 is provided with a closing oil inlet passage 22 and a closing oil outlet passage 21, and the closing oil inlet passage 22 communicates with the closing valve cavity and the energy accumulator 4; the closing oil outlet channel 21 is communicated with the closing valve cavity and the rodless cavity, and an oil outlet of the closing oil outlet channel 21 communicated with the rodless cavity forms a working oil port. The closing oil inlet passage 22 and the closing oil outlet passage 21 are communicated through a closing valve cavity. Wherein 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 forms a valve core spring. The closing valve core 24 comprises a closing valve ball 25, the closing valve ball 25 is arranged on one side of the closing valve core 24 far away from the third return spring 23, the closing valve ball 25 is provided with a sealing spherical surface, and the third return spring 23 is pressed on the closing valve core 24, so that the closing valve ball 25 is in sealing fit with the closing valve port 33, and further the closing oil inlet channel 22 and the closing oil outlet channel 21 are cut off. The closing valve cavity is provided with a closing baffle 10 below, and the closing baffle 10 is used for plugging the closing valve cavity.
In this embodiment, a closing movable chamber 31 is arranged below the closing valve core 24, a closing bypass oil duct 9 is further arranged in the closing valve body 11, and the closing bypass oil duct 9 communicates with the closing oil inlet duct 22 and the closing movable chamber 31, so that the closing movable chamber 31 below the closing valve core 24 does not become a dead space, and the closing valve core 24 is ensured to move flexibly.
In this embodiment, 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 is communicated with the energy accumulator. The closing valve port 33 is communicated with the closing valve cavity, the central line of the closing valve port 33 is coincident with the central line of the closing valve cavity, the closing valve body is hermetically and slidably assembled with a closing drive rod 8, and the lower end of the closing drive rod 8 penetrates through the closing valve port 33. Under the drive of the closing repulsion mechanism 5, the closing drive rod 8 drives the closing valve ball 25 to move downwards, so that the closing oil inlet passage 22 is communicated with the closing oil outlet passage 21. Wherein, the closing drive rod 8 constitutes a closing drive member.
As shown in fig. 2, all be equipped with flange on closing actuating lever 8 and the closing repulsion mechanism 5, closing repulsion mechanism 5 passes through closing flange structure 7 and closing actuating lever 8 fixed connection, and closing repulsion mechanism 5 includes repulsion dish and first reset spring 6, and first reset spring 6 can guarantee to return the normal position after the action of repulsion dish, and the initial position when guaranteeing to move at every turn is unanimous moreover, is favorable to guaranteeing the stability of product action parameter. Wherein the first return spring 6 constitutes a repulsive disc return spring.
As shown in fig. 2 and 4, the opening control valve unit includes an opening valve body 15, the opening valve body 15 has an opening valve cavity, an opening oil inlet channel 27 and an opening oil outlet channel 26 are arranged on the opening valve body 15, and the opening oil inlet channel 27 communicates the opening valve cavity and the rodless cavity; the opening oil outlet passage 26 is communicated with the closing valve cavity and the oil tank 14, and an oil outlet of the opening oil outlet passage communicated with the oil tank forms a low-pressure oil port. The opening oil inlet channel 27 and the opening oil outlet channel 26 are communicated through the opening valve cavity.
And a brake-separating valve core 29 and a fourth return spring 28 are arranged in the brake-separating valve cavity, and the fourth return spring 28 forms a valve core spring. The opening valve spool 29 comprises an opening valve ball 30, the opening valve ball 30 is arranged on one side of the opening valve spool 29 far away from the fourth return spring 28, the opening valve ball 30 is provided with a sealing spherical surface, and the fourth return spring 28 is pressed on the opening valve spool 29, so that the opening valve ball 30 is in sealing fit with the opening valve port 34, and the opening oil inlet channel 27 and the opening oil outlet channel 26 are further cut off. The lower part of the opening valve cavity is provided with an opening baffle 13, and the opening baffle 13 is used for plugging the opening valve cavity.
In this embodiment, the opening movable cavity 32 is disposed below the opening valve element 29, the opening bypass oil duct 12 is further disposed in the opening valve body 15, and the opening bypass oil duct 12 communicates with the opening oil inlet duct 27 and the opening movable cavity 32 below the opening valve element 29, so that the opening movable cavity 32 below the opening valve element 29 does not become a dead space, and the opening valve element 29 is ensured to move flexibly.
In this embodiment, the opening oil inlet channel 27 has an opening valve port 34 and an opening oil inlet, the opening oil inlet forms a working oil port, and the opening oil inlet is communicated with the rodless cavity. The opening valve port 34 is communicated with the opening valve cavity, the central line of the opening valve port 34 is coincident with the central line of the opening valve cavity, the opening valve body is hermetically and slidably assembled with the opening drive rod 16, and the lower end of the opening drive rod 16 penetrates through the opening valve port 34. Under the driving of the opening repulsion mechanism 19, the opening driving rod 16 drives the opening valve ball 30 to move downwards, so as to realize the communication between the opening oil inlet channel 27 and the opening oil outlet channel 26. Wherein, the opening driving rod 16 constitutes an opening driving member.
As shown in fig. 2, the opening driving rod 16 and the opening repulsion mechanism 19 are both provided with a connecting flange, the opening repulsion mechanism 19 is fixedly connected with the opening driving rod 16 through an opening flange structure 17, the opening repulsion mechanism 19 comprises a repulsion plate and a second reset spring 18, the second reset spring 18 can ensure that the repulsion plate returns to the original position after acting, and the initial position during each action is ensured to be consistent, which is beneficial to ensuring the stability of the product action parameters. Wherein the second return spring 18 constitutes a repulsive disc return spring.
In this embodiment, both the closing repulsion mechanism and the opening repulsion mechanism form the driving device. The repulsion mechanism is an existing mature product, is stopped by the repulsion mechanism, has response time of driving the working cylinder about 1/5-1/4 of the response time of a traditional electromagnetic control valve, has large output force, and can completely overcome hydraulic resistance, thereby directly controlling the on-off of an oil channel of the hydraulic operating mechanism.
As shown in fig. 2, the chamber P is connected to the accumulator 4, in which high pressure oil is always present. The Z cavity is connected with the rodless cavity, is communicated with the P cavity when in a brake closing position and is high-pressure oil; when the valve is in the opening position, the valve is communicated with the T cavity and is low-pressure oil. The T cavity is connected with an oil tank and always is low-pressure oil.
When the hydraulic operating mechanism performs a closing operation, the closing repulsion mechanism 5 acts to drive the closing driving rod 8 to jack the closing valve ball 25, the closing oil inlet passage 22 is communicated with the closing oil outlet passage 21, hydraulic oil in the P cavity enters the Z cavity, and the P cavity and the Z cavity are both high-pressure oil at the moment, and because the piston area of the rodless cavity is larger than that of the rod cavity, the piston rod 2 moves towards the rod cavity under the action of pressure difference, so that the moving end part 20 of the main fracture is driven to complete the closing operation, and then the closing repulsion force 5 returns to the original position under the action of the first reset spring 6. When the opening operation is carried out, the opening repulsion mechanism 19 acts to drive the opening driving rod 16 to push open the opening valve ball 30, the opening oil inlet channel 27 is communicated with the opening oil outlet channel 26, the hydraulic oil in the Z cavity enters the T cavity, the P cavity is high-pressure oil at the moment, and the Z cavity is low-pressure oil, so that the piston rod 2 moves towards the rodless cavity under the action of the pressure difference, the movable end part 20 of the main fracture is driven to complete the opening operation, and then the opening repulsion mechanism 19 returns to the original position under the action of the second reset spring 18, and the opening and closing operation is completed.
The hydraulic operating mechanism directly controls the on-off of the oil duct of the hydraulic operating mechanism through the repulsion mechanism, so that the working cylinder is driven to perform opening or closing operation, the action link of an intermediate control valve is reduced, the response time of elements is shortened, the opening action time requirement of a quick switch of a power grid system can be met, the short-circuit current of the breaker is reduced, and the safety of the power grid system is improved.
The hydraulic operating mechanism of the invention has the following specific embodiment 2:
the difference from the specific embodiment 1 is that in embodiment 1, the closing drive rod 8 drives the closing valve core 24 from above the closing valve core 24, and the opening drive rod 16 drives the opening valve core 29 from above the opening valve core 29, in this embodiment, the closing drive rod is hermetically and slidably assembled on the closing valve body at the lower part of the closing valve core, and the closing drive rod passes through a third return spring and is fixedly connected with the closing valve core; meanwhile, the opening driving rod is assembled on the opening valve body at the lower part of the opening valve core in a sealing and sliding mode, and the opening driving rod penetrates through the fourth reset spring and is fixedly connected with the opening valve core.
The hydraulic operating mechanism of the invention has the following specific embodiment 3:
the difference from the specific embodiment 1 is that in embodiment 1, the closing valve core 24 includes a closing valve ball 25, and the closing valve core 24 cuts off the closing oil inlet passage 22 and the closing oil outlet passage 21 through the closing valve ball 25; the opening valve core 29 comprises an opening valve ball 30, the opening valve core 29 cuts off the opening oil inlet channel 27 and the opening oil outlet channel 26 through the opening valve ball 30, in the embodiment, one side of the closing valve core, which is back to the third return spring, is provided with a closing conical structure, and the closing valve core is in sealing fit with a closing valve port through the opening conical structure; meanwhile, one side of the opening valve core, which faces away from the fourth reset spring, is provided with an opening conical structure, and the opening valve core is in sealing fit with the opening of the opening valve through the opening conical structure.
The specific embodiment 4 of the hydraulic operating mechanism of the invention:
the difference from embodiment 1 is that in embodiment 1, connecting flanges are respectively disposed on the opening driving rod 16 and the closing driving rod 8, and the two driving rods are respectively and fixedly connected to the corresponding repulsion mechanism through the connecting flanges, in this embodiment, threaded holes are radially disposed at ends of the opening driving rod and the closing driving rod, which are far away from the corresponding valve body, the output end of the corresponding repulsion mechanism is of a sleeve structure, through holes extending along the radial direction of the sleeve structure are disposed on the sleeve structure, and bolts pass through the through holes and are screwed into the threaded holes, so as to fixedly connect the opening driving rod and the closing driving rod to the corresponding repulsion mechanism. In other embodiments, the opening driving rod and the closing driving rod and the corresponding repulsion mechanism can also be connected through threads.
The hydraulic operating mechanism of the invention has the following specific embodiment 5:
the difference from embodiment 1 is that in embodiment 1, a closing bypass oil duct 9 is provided in the closing valve body 11, so that a closing valve cavity below the closing valve core 24 does not become a dead space, and an opening bypass oil duct 12 is provided in the opening valve body 15, so that an opening valve cavity below the opening valve core 29 does not become a dead space.
In the embodiment of the control valve of the hydraulic operating mechanism according to the present invention, the structure of the control valve of the hydraulic operating mechanism in this embodiment is the same as that of any one of the control valves described in embodiments 1 to 5 of the hydraulic operating mechanism, and details are not described herein again.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.

Claims (10)

1. The hydraulic pressure operating mechanism includes:
the working cylinder comprises a rod cavity and a rodless cavity, and the rod cavity is connected with a high-pressure oil source;
the control valve comprises a high-pressure oil port, a working oil port and a low-pressure oil port;
the high-pressure oil port is communicated with a high-pressure oil source, the working oil port is communicated with the rodless cavity, and the low-pressure oil port is communicated with an oil tank;
it is characterized in that the preparation method is characterized in that,
the control valve also comprises a closing control valve unit and an opening control valve unit;
the closing control valve unit and the opening control valve unit both comprise valve bodies, valve cores and driving pieces;
the valve body is provided with an oil inlet, an oil outlet, an oil inlet channel and an oil outlet channel, the oil inlet channel and the oil outlet channel are respectively communicated with the oil inlet and the oil outlet, and a valve port is arranged between the oil inlet channel and the oil outlet channel;
the valve core is movably arranged in the valve body and used for plugging and opening the valve port;
a valve core spring is arranged in the valve body and used for applying acting force for plugging the valve port to the valve core;
the high-pressure oil port is formed at the oil inlet of the closing control valve unit, the low-pressure oil port is formed at the oil outlet of the opening control valve unit, and the working oil ports are formed at the oil outlet of the closing control valve unit and the oil inlet of the opening control valve unit;
the driving piece is arranged corresponding to the valve core and is used for driving the valve core to move so as to open the valve port;
the driving piece is connected with a repulsion mechanism, and the repulsion mechanism is used for driving the driving piece to act.
2. The hydraulic operating mechanism according to claim 1, wherein the valve port is formed by an opening at an end of the oil inlet channel away from the high-pressure oil port;
a valve cavity is arranged in the valve body, and the valve core is arranged in the valve cavity in a sliding and sealing manner;
one side of the valve core, which is back to the valve port, is provided with a movable cavity, the movable cavity is used for providing a movable space for the valve core, and a bypass oil duct is arranged between the movable cavity and the oil inlet duct.
3. The hydraulic actuator of claim 2, wherein the actuator is slidably and sealingly mounted on the valve body and extends into the oil inlet passage.
4. The hydraulic actuator of claim 1, 2 or 3, wherein the driver and the spool are separate from each other;
the repulsion mechanism comprises a repulsion plate and a repulsion plate reset spring, and after the repulsion plate drives the driving piece to push the valve core to be opened, the repulsion plate reset spring is used for driving the repulsion plate to reset so that the driving piece releases the pushing of the valve core.
5. The hydraulic operating mechanism according to claim 1, 2 or 3, wherein the valve core is provided with a sealing spherical surface, and the sealing spherical surface is used for being in sealing fit with the valve port.
6. The control valve of the hydraulic operating mechanism comprises a high-pressure oil port, a working oil port and a low-pressure oil port;
the high-pressure oil port is communicated with a high-pressure oil source, the working oil port is communicated with the rodless cavity, and the low-pressure oil port is communicated with an oil tank;
it is characterized in that the preparation method is characterized in that,
the device also comprises a closing control valve unit and an opening control valve unit;
the closing control valve unit and the opening control valve unit both comprise valve bodies, valve cores and driving pieces;
the valve body is provided with an oil inlet, an oil outlet, an oil inlet channel and an oil outlet channel, the oil inlet channel and the oil outlet channel are respectively communicated with the oil inlet and the oil outlet, and a valve port is arranged between the oil inlet channel and the oil outlet channel;
the valve core is movably arranged in the valve body and used for plugging and opening the valve port;
a valve core spring is arranged in the valve body and used for applying acting force for plugging the valve port to the valve core;
the high-pressure oil port is formed at the oil inlet of the closing control valve unit, the low-pressure oil port is formed at the oil outlet of the opening control valve unit, and the working oil ports are formed at the oil outlet of the closing control valve unit and the oil inlet of the opening control valve unit;
the driving piece is arranged corresponding to the valve core and is used for driving the valve core to move so as to open the valve port;
the driving piece is connected with a repulsion mechanism, and the repulsion mechanism is used for driving the driving piece to act.
7. The control valve of the hydraulic operating mechanism according to claim 6, wherein the valve port is formed by an opening at an end of the oil inlet channel away from the high-pressure oil port;
a valve cavity is arranged in the valve body, and the valve core is arranged in the valve cavity in a sliding and sealing manner;
one side of the valve core, which is back to the valve port, is provided with a movable cavity, the movable cavity is used for providing a movable space for the valve core, and a bypass oil duct is arranged between the movable cavity and the oil inlet duct.
8. The control valve for a hydraulic operating mechanism according to claim 7, wherein the driving member is slidably and sealingly fitted to the valve body and penetrates into the oil inlet passage.
9. The control valve of the hydraulic actuator according to claim 6, 7 or 8, wherein the driving member and the spool are separated from each other;
the repulsion mechanism comprises a repulsion plate and a repulsion plate reset spring, and after the repulsion plate drives the driving piece to push the valve core to be opened, the repulsion plate reset spring is used for driving the repulsion plate to reset so that the driving piece releases the pushing of the valve core.
10. The control valve of the hydraulic operating mechanism according to claim 6, 7 or 8, wherein the valve core is provided with a sealing spherical surface, and the sealing spherical surface is used for being in sealing fit with the valve port.
CN202011264273.9A 2020-03-18 2020-11-12 Hydraulic operating mechanism and control valve thereof Active CN112324720B (en)

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CN2020101917278 2020-03-18

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Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2869265B2 (en) * 1992-05-29 1999-03-10 三菱電機株式会社 Breaker
CN2306355Y (en) * 1997-05-04 1999-02-03 刘中亚 Spring energy-storage hydraulic operating mechanism for medium-high voltage circuit breaker
CN2854793Y (en) * 2005-11-25 2007-01-03 新东北电气(沈阳)高压开关有限公司 Hydraulic operation mechanism for high tension circuit breaker
CN100585242C (en) * 2008-04-18 2010-01-27 沈阳东华同方电子科技有限公司 Electromagnetic hydraulic valve possessing self-defence capability
CN204361027U (en) * 2014-12-24 2015-05-27 丹东金桥车辆配件有限公司 For the hydraulic electromagnetic changement of primary cut-out hydraulic spring grease cup powder operation device
CN110552935B (en) * 2018-06-04 2021-04-30 平高集团有限公司 Hydraulic operating mechanism

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