CN112503044A - Hydraulic control valve and hydraulic operating mechanism - Google Patents
Hydraulic control valve and hydraulic operating mechanism Download PDFInfo
- Publication number
- CN112503044A CN112503044A CN202011249519.5A CN202011249519A CN112503044A CN 112503044 A CN112503044 A CN 112503044A CN 202011249519 A CN202011249519 A CN 202011249519A CN 112503044 A CN112503044 A CN 112503044A
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- Prior art keywords
- valve
- valve core
- area
- moving area
- oil
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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
- 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
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
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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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/087—Control strategy, e.g. with block diagram
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/04—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves
- F16K11/044—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves with movable valve members positioned between valve seats
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0263—Construction of housing; Use of materials therefor of lift valves multiple way valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/029—Electromagnetically actuated valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0603—Multiple-way valves
- F16K31/0624—Lift valves
- F16K31/0627—Lift valves with movable valve member positioned between seats
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/24—Power arrangements internal to the switch for operating the driving mechanism using pneumatic or hydraulic actuator
Abstract
The invention relates to a hydraulic control valve and a hydraulic operating mechanism. A hydraulic control valve comprises a valve body, a valve core, a closing electromagnetic valve and a brake-separating driving rod, wherein the brake-separating driving rod is arranged at the left end or the right end of the valve core, corresponds to the end face of the valve core and is used for pushing and/or pulling the valve core to move towards the right under the driving of a driving module so as to realize the brake separation of a working cylinder; the opening driving rod penetrates through the side wall of the corresponding left side moving area or right side moving area along the left-right direction in a guiding mode, and is in dynamic sealing fit with the side wall of the valve core moving area; the right moving area is connected with a check valve, the check valve is provided with an oil inlet and an oil outlet, the oil inlet is communicated with the right moving area, and the oil outlet is used for discharging oil in the right moving area; the check valve has an opening pressure higher than the operating pressure of the normal-high pressure oil region and is adapted to open under hydraulic pressure generated by movement of the spool when the spool moves rightward. Above-mentioned scheme can solve current hydraulic control valve and adopt the repulsion module to carry out the higher problem of divide-shut brake switching-over cost.
Description
Technical Field
The invention relates to a hydraulic control valve and a hydraulic operating mechanism.
Background
The opening and closing action time of the circuit breaker is a key parameter of the performance of the circuit breaker, and the key parameter is mainly ensured by an operating mechanism of the circuit breaker. In the case of a hydraulic actuator, the working cylinder is operated under the control of a hydraulic control valve, and therefore, the hydraulic control valve is required to have a high response speed.
The conventional hydraulic control valve uses an electromagnetic valve as a primary valve, and changes the communication state of a channel in a valve body by the electromagnetic valve to realize the reversing of the hydraulic control valve, for example, a hydraulic spring operating mechanism of a high-voltage circuit breaker disclosed in chinese patent with an authorization publication No. CN 201655571U. However, the response speed of the conventional solenoid-operated valve is limited, and it is difficult to satisfy the requirement of a rapid response speed for the following reasons: 1. the number of turns of the electromagnet of the electromagnetic valve is large, the wire diameter is small, and the inherent response time is long; 2. the electromagnet of the electromagnetic control valve has limited output force and can not directly drive the main valve of the control valve to act, and the structure adopts a multi-stage control amplification mode, namely the electromagnet coil is electrified, the action of the movable iron core, the action of the valve core of the first-stage valve, the action of the two-stage valve and the action of the main valve are carried out, and the inherent action time is long.
In order to solve the problems, the chinese patent with the publication number of CN102403139B discloses a repulsion reversing valve for an extra-high voltage series compensation bypass switch, which comprises a valve body, wherein a valve core is arranged in the valve body, one axial end of the valve core is connected with a repulsion module, the valve core is driven by the repulsion module to act, and the quick action requirement of the valve core is met by the characteristics of high response speed and large output force of the repulsion module. A normal-low pressure oil area, a working oil area, a normal-high pressure oil area and a valve core moving area are arranged in a valve body of the repulsion reversing valve, a low-pressure oil path interface, a working oil path interface and a high-pressure oil path interface are arranged on the valve body, and the low-pressure oil path interface, the working oil path interface and the high-pressure oil path interface are respectively communicated with the normal-low pressure oil area, the working oil area and the normal-high pressure oil area. In addition, a holding oil hole (namely a high-pressure oil hole in CN 102403139B) and a pressure holding wing are further arranged in the valve core, the holding oil hole communicates the normal-high pressure oil area with the valve core moving area, and is used for holding the valve core in an opening state by means of a hydraulic pressure difference between the valve core moving area and the normal-high pressure oil area, and the pressure holding wing is used for holding the valve core in a closing state. Adopt the repulsion module can realize that hydraulic control valve acts fast, but the cost of two-way repulsion module is higher, to the condition that only needs to improve the separating brake speed, if still adopt the repulsion module to realize the switching-on and switching-off switching-over, then can influence the overall cost of product.
Disclosure of Invention
The invention aims to provide a hydraulic control valve, which solves the problem that the existing hydraulic control valve adopts a repulsion module to perform switching-on and switching-off reversing with higher cost; another object of the present invention is to provide a hydraulic operating mechanism, which solves the problems of high cost and overall cost influence of the hydraulic control valve of the existing hydraulic operating mechanism.
The hydraulic control valve adopts the following technical scheme:
a hydraulic control valve comprising:
the valve comprises a valve body, wherein a normal-low pressure oil area, a working oil area, a normal-high pressure oil area and a valve core moving area are arranged in the valve body, and the valve core moving area is a closed area and is arranged at the end part of a valve core and used for providing a space for the sliding of the valve core;
the valve core is arranged in the valve body in a sliding manner;
the side of the hydraulic control valve provided with the normal low pressure oil area is the left side, and the side provided with the normal high pressure oil area is the right side, so that the valve core moving area comprises a left side moving area and a right side moving area which are respectively arranged at the left end and the right end of the valve core;
the closing electromagnetic valve is used for communicating the high-pressure side moving area with the normal-high pressure oil area so as to change the left-right direction hydraulic acting force applied to the end face of the valve core positioned in the high-pressure side moving area, so that the valve core moves leftwards to realize closing of the working cylinder;
the hydraulic control valve also comprises a brake-separating driving rod, the brake-separating driving rod is arranged at the left end or the right end of the valve core, corresponds to the end face of the valve core, and is used for pushing and/or pulling the valve core to move towards the right under the driving of the driving module so as to realize the brake separation of the working cylinder;
the opening driving rod penetrates through the side wall of the corresponding left side moving area or right side moving area along the left-right direction in a guiding mode, and is in dynamic sealing fit with the side wall of the valve core moving area;
the right moving area is connected with a check valve, the check valve is provided with an oil inlet and an oil outlet, the oil inlet is communicated with the right moving area, and the oil outlet is used for discharging oil in the right moving area;
the check valve has an opening pressure higher than the operating pressure of the normal-high pressure oil region and is adapted to open under hydraulic pressure generated by movement of the spool when the spool moves rightward.
The technical scheme has the beneficial effects that: by adopting the technical scheme, the closing electromagnetic valve can realize closing of the working cylinder, the opening driving rod can realize opening of the working cylinder, and the quick opening requirement can be met by utilizing the driving module with higher speed through the opening driving rod, so that the problem of higher cost caused by the fact that opening and closing reversing of the hydraulic control valve depends on the driving module with higher speed can be solved; meanwhile, the opening driving rod penetrates through the side wall of the corresponding left side moving area or right side moving area and is matched with the side wall of the valve core moving area in a dynamic sealing mode, the valve core moving area required by the normal work of the closing electromagnetic valve can be reserved, the check valve with higher opening pressure is arranged, the pressure of the right side moving area cannot be influenced after the valve core of the hydraulic control valve moves to the closing position, the oil discharge requirement of the right side moving area can be met when the valve core moves rightwards, dead space is avoided, the opening and closing reversing functions of the hydraulic control valve are met, a driving module with higher speed can be adopted for the switching-on and-off reversing only, and the cost is reduced.
As a preferred technical scheme, an oil discharge channel is arranged on the valve body, and the oil discharge port is communicated with the normal and low pressure oil area through the oil discharge channel.
The technical scheme has the beneficial effects that: by adopting the technical scheme, the oil discharge channel can directly lead the oil discharged by the check valve into the normal and low pressure oil areas, the collection of the oil is convenient, and the discharge of the oil is avoided.
As a preferred technical solution, the check valve is integrated in the valve body.
The technical scheme has the beneficial effects that: by adopting the technical scheme, the structure is compact, and the occupied space is favorably reduced.
As a preferred technical scheme, a closing self-holding channel is arranged on the valve body and/or the valve core, and the closing self-holding channel communicates the right moving area with the working oil area;
and the flow area of the closing self-holding channel is smaller than the oil discharge flow area of the check valve.
The technical scheme has the beneficial effects that: by adopting the technical scheme, the self-holding channel for closing can be used for keeping the position of the valve core when the valve core moves to the opening state, and the flow area of the self-holding channel for closing is smaller than the oil discharge flow area of the check valve, so that the pressure loss in the action process of the valve core can be effectively reduced.
As a preferred technical scheme, a left moving area channel is arranged on the valve body and/or the valve core and communicates the left moving area with the normal-high pressure oil area;
the effective end face area of the valve core exposed in the left valve core moving area is A1, the effective end face area of the valve core exposed in the normal and high pressure oil area when the valve core moves to the right to the limit position is A2, the effective end face area of the valve core exposed in the working oil area when the valve core moves to the left to the limit position is A3, the effective end face area of the valve core exposed in the right moving area is A4, A1 is greater than A2, and A1 is less than A3+ A4;
the effective end surface area is the net area of the valve core exposed in the left valve core moving area, the normal-high pressure oil area, the working oil area or the right moving area when the valve core moves to the limit position leftwards or rightwards, and the end surface of the valve core is used for generating the integral hydraulic acting force in the left-right direction on the valve core.
The technical scheme has the beneficial effects that: by adopting the technical scheme, the closing position and opening position of the valve core can be kept by reasonably setting the relation between the areas of the effective end surfaces, and the reliable action of the hydraulic control valve is ensured.
As a preferable technical solution, the valve body includes a valve main body and a valve sleeve, and the closing self-holding channel is provided on the valve sleeve.
The technical scheme has the beneficial effects that: by adopting the technical scheme, the valve has the advantages of compact structure and high space utilization rate, and can avoid the processing of a channel on the valve body, thereby being convenient for processing.
As a preferable technical scheme, the opening driving rod is arranged at the right end of the valve core and is fixedly connected with the valve core.
The technical scheme has the beneficial effects that: by adopting the technical scheme, the effective end surface area of the left end of the valve core is convenient to ensure, and the design of the parameters of the valve core is convenient.
As a preferable technical scheme, the opening drive rod is arranged at the left end of the valve core and is arranged separately from the valve core, and a gap is formed between the opening drive rod and the end face of the left end of the valve core.
The technical scheme has the beneficial effects that: by adopting the technical scheme, the driving rod and the valve core can be independently processed, and the valve is convenient to manufacture.
The hydraulic operating mechanism adopts the following technical scheme:
the hydraulic pressure operating mechanism includes:
the working cylinder is used for driving the circuit breaker to act;
the hydraulic control valve is used for controlling the extension and contraction of the working cylinder;
the hydraulic control valve includes:
the valve comprises a valve body, wherein a normal-low pressure oil area, a working oil area, a normal-high pressure oil area and a valve core moving area are arranged in the valve body, and the valve core moving area is a closed area and is arranged at the end part of a valve core and used for providing a space for the sliding of the valve core;
the valve core is arranged in the valve body in a sliding manner;
the side of the hydraulic control valve provided with the normal low pressure oil area is the left side, and the side provided with the normal high pressure oil area is the right side, so that the valve core moving area comprises a left side moving area and a right side moving area which are respectively arranged at the left end and the right end of the valve core;
the closing electromagnetic valve is used for communicating the high-pressure side moving area with the normal-high pressure oil area so as to change the left-right direction hydraulic acting force applied to the end face of the valve core positioned in the high-pressure side moving area, so that the valve core moves leftwards to realize closing of the working cylinder;
the hydraulic control valve also comprises a brake-separating driving rod, the brake-separating driving rod is arranged at the left end or the right end of the valve core, corresponds to the end face of the valve core, and is used for pushing and/or pulling the valve core to move towards the right under the driving of the driving module so as to realize the brake separation of the working cylinder;
the opening driving rod penetrates through the side wall of the corresponding left side moving area or right side moving area along the left-right direction in a guiding mode, and is in dynamic sealing fit with the side wall of the valve core moving area;
the right moving area is connected with a check valve, the check valve is provided with an oil inlet and an oil outlet, the oil inlet is communicated with the right moving area, and the oil outlet is used for discharging oil in the right moving area;
the check valve has an opening pressure higher than the operating pressure of the normal-high pressure oil region and is adapted to open under hydraulic pressure generated by movement of the spool when the spool moves rightward.
The technical scheme has the beneficial effects that: by adopting the technical scheme, the closing electromagnetic valve can realize closing of the working cylinder, the opening driving rod can realize opening of the working cylinder, and the quick opening requirement can be met by utilizing the driving module with higher speed through the opening driving rod, so that the problem of higher cost caused by the fact that opening and closing reversing of the hydraulic control valve depends on the driving module with higher speed can be solved; meanwhile, the opening driving rod penetrates through the side wall of the corresponding left side moving area or right side moving area and is matched with the side wall of the valve core moving area in a dynamic sealing mode, the valve core moving area required by the normal work of the closing electromagnetic valve can be reserved, the check valve with higher opening pressure is arranged, the pressure of the right side moving area cannot be influenced after the valve core of the hydraulic control valve moves to the closing position, the oil discharge requirement of the right side moving area can be met when the valve core moves rightwards, dead space is avoided, the opening and closing reversing functions of the hydraulic control valve are met, a driving module with higher speed can be adopted for the switching-on and-off reversing only, and the cost is reduced.
As a preferred technical scheme, an oil discharge channel is arranged on the valve body, and the oil discharge port is communicated with the normal and low pressure oil area through the oil discharge channel.
The technical scheme has the beneficial effects that: by adopting the technical scheme, the oil discharge channel can directly lead the oil discharged by the check valve into the normal and low pressure oil areas, the collection of the oil is convenient, and the discharge of the oil is avoided.
As a preferred technical solution, the check valve is integrated in the valve body.
The technical scheme has the beneficial effects that: by adopting the technical scheme, the structure is compact, and the occupied space is favorably reduced.
As a preferred technical scheme, a closing self-holding channel is arranged on the valve body and/or the valve core, and the closing self-holding channel communicates the right moving area with the working oil area;
and the flow area of the closing self-holding channel is smaller than the oil discharge flow area of the check valve.
The technical scheme has the beneficial effects that: by adopting the technical scheme, the self-holding channel for closing can be used for keeping the position of the valve core when the valve core moves to the opening state, and the flow area of the self-holding channel for closing is smaller than the oil discharge flow area of the check valve, so that the pressure loss in the action process of the valve core can be effectively reduced.
As a preferred technical scheme, a left moving area channel is arranged on the valve body and/or the valve core and communicates the left moving area with the normal-high pressure oil area;
the effective end face area of the valve core exposed in the left valve core moving area is A1, the effective end face area of the valve core exposed in the normal and high pressure oil area when the valve core moves to the right to the limit position is A2, the effective end face area of the valve core exposed in the working oil area when the valve core moves to the left to the limit position is A3, the effective end face area of the valve core exposed in the right moving area is A4, A1 is greater than A2, and A1 is less than A3+ A4;
the effective end surface area is the net area of the valve core exposed in the left valve core moving area, the normal-high pressure oil area, the working oil area or the right moving area when the valve core moves to the limit position leftwards or rightwards, and the end surface of the valve core is used for generating the integral hydraulic acting force in the left-right direction on the valve core.
The technical scheme has the beneficial effects that: by adopting the technical scheme, the closing position and opening position of the valve core can be kept by reasonably setting the relation between the areas of the effective end surfaces, and the reliable action of the hydraulic control valve is ensured.
As a preferable technical solution, the valve body includes a valve main body and a valve sleeve, and the closing self-holding channel is provided on the valve sleeve.
The technical scheme has the beneficial effects that: by adopting the technical scheme, the valve has the advantages of compact structure and high space utilization rate, and can avoid the processing of a channel on the valve body, thereby being convenient for processing.
As a preferable technical scheme, the opening driving rod is arranged at the right end of the valve core and is fixedly connected with the valve core.
The technical scheme has the beneficial effects that: by adopting the technical scheme, the effective end surface area of the left end of the valve core is convenient to ensure, and the design of the parameters of the valve core is convenient.
As a preferable technical scheme, the opening drive rod is arranged at the left end of the valve core and is arranged separately from the valve core, and a gap is formed between the opening drive rod and the end face of the left end of the valve core.
The technical scheme has the beneficial effects that: by adopting the technical scheme, the driving rod and the valve core can be independently processed, and the valve is convenient to manufacture.
As a preferable technical scheme, the hydraulic operating mechanism comprises a driving module for driving a brake-separating driving rod of the hydraulic control valve to act, and the driving module is a repulsion module.
The technical scheme has the beneficial effects that: by adopting the technical scheme, the repulsion module is mature in technology and can easily realize quick driving.
Drawings
FIG. 1 is a schematic structural view of embodiment 1 of a hydraulic control valve according to the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A when the hydraulic control valve is opened;
FIG. 3 is an enlarged view of a portion of FIG. 1 at A when the hydraulic control valve is closed;
FIG. 4 is a schematic structural view of the valve body of FIG. 1;
FIG. 5 is a schematic structural view of embodiment 2 of the hydraulic control valve of the invention;
FIG. 6 is a schematic structural view of embodiment 3 of the hydraulic control valve of the invention;
the names of the components corresponding to the corresponding reference numerals in the drawings are: 1-valve body, 2-left valve sleeve, 3-right valve sleeve, 4-valve core, 5-driving module, 6-normal low pressure oil area, 7-working oil area, 8-normal high pressure oil area, 9-opening position sealing valve port, 10-closing position sealing valve port, 11-left side moving area, 12-right side moving area, 13-left side moving area channel, 14-closing self-holding channel, 15-opening driving rod, 16-closing electromagnetic valve, 17-coil, 18-repulsion plate, 19-driving rod, 20-connecting flange, 21-opening oil discharging channel, 22-check valve, 23-valve ball, 24-valve ball spring, 25-electromagnetic valve oil feeding channel and 26-electromagnetic valve oil discharging channel.
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, which may be present in the embodiments of the present invention, are 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 recitation of "comprising an … …" may occur without the exclusion of additional like elements present in the process, method, article, or apparatus that comprises the element.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, unless otherwise specifically stated or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be detachable or non-detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention will be described in further detail with reference to examples.
As shown in fig. 1 to 4, an embodiment 1 of the hydraulic control valve of the present invention includes a valve main body 1, a left valve sleeve 2, a right valve sleeve 3, a valve core 4, a driving module 5, and a closing solenoid valve 16.
Similar to the structure in the prior art: as shown in fig. 1, a valve body is composed of a valve body 1, a left valve sleeve 2 and a right valve sleeve 3, a normal-low pressure oil area 6, a working oil area 7 and a normal-high pressure oil area 8 are arranged in the valve body, and the normal-low pressure oil area 6, the working oil area 7 and the normal-high pressure oil area 8 are all enclosed by the valve sleeve and a valve core 4; as shown in fig. 2 and 3, the left end opening of the right valve sleeve 3 forms a switching-off position sealing valve port 9, and the right end opening of the left valve sleeve 2 forms a switching-on position sealing valve port 10; the axial middle part of the valve core 4 is provided with a large-diameter section, the peripheral surfaces of two ends of the large-diameter section are conical surfaces and are respectively used for being in sealing fit with the opening position sealing valve port 9 and the closing position sealing valve port 10 in a linear sealing mode; the valve body is provided with a low-pressure oil way interface T, a working oil way interface Z and a high-pressure oil way interface P, and the low-pressure oil way interface T, the working oil way interface Z and the high-pressure oil way interface P are respectively communicated with a normal-low pressure oil area 6, a working oil area 7 and a normal-high pressure oil area 8.
The valve core 4 is arranged in the valve body in a sliding manner, the hydraulic control valve further comprises a brake-separating driving rod 15, and the brake-separating driving rod 15 is fixedly connected to the right end face of the valve core 4 and used for driving the valve core 4 to act under the driving of the driving module 5; the opening drive rod 15 is guided in the left-right direction to pass through the side wall of the right moving area 12 and is in dynamic sealing fit with the side wall of the right moving area 12.
And a valve core moving area is also arranged in the valve body, the valve core moving area comprises a left moving area 11 and a right moving area 12, and the left moving area 11 and the right moving area 12 are respectively arranged at the left end and the right end of the valve core 4. The valve core moving area is used for providing space for the sliding of the valve core 4 and is a closed area. The left moving area channel 13 is arranged on the valve core 4, the left moving area channel 13 is arranged along the axis of the valve core 4, the right end of the left moving area channel 13 comprises an inclined channel, and the inclined channel penetrates through the outer peripheral surface of the valve core 4, so that the left moving area 11 is communicated with the normal-pressure and high-pressure oil area 8, the volume of the left moving area 11 is automatically adjusted when the valve core 4 acts, and the situation that the valve core 4 refuses to move due to the fact that the volume of the left moving area 11 cannot change.
The right moving area 12 is communicated with three passages, namely a closing solenoid valve passage (including a solenoid valve oil inlet passage 25 and a solenoid valve oil outlet passage 26), a closing self-holding passage 14 and an opening oil outlet passage 21.
The closing electromagnetic valve 16 is fixed outside the valve main body 1, the electromagnetic valve oil inlet channel 25 and the electromagnetic valve oil outlet channel 26 are connected with two valve ports of the closing electromagnetic valve 16, the electromagnetic valve oil inlet channel 25 can be communicated with the electromagnetic valve oil outlet channel 26 when the closing electromagnetic valve 16 is opened, the electromagnetic valve oil inlet channel 25 can be cut off from the electromagnetic valve oil outlet channel 26 when the closing electromagnetic valve is closed, and the normal-high pressure oil area 8 can be communicated with and cut off from the right moving area 12.
The closing self-holding channel 14 is provided on the right valve housing 3 and has a section common to the solenoid valve oil discharge channel 26 for communicating the right moving area 12 with the working oil area 7. When the hydraulic control valve is at the switching-on position, the switching-on self-holding channel 14 is communicated with the normal-high pressure oil area 8, and high-pressure oil is arranged inside the switching-on self-holding channel; when the brake is switched off, the oil inlet is communicated with the normal-low pressure oil area 6, and low-pressure oil is arranged inside the oil inlet; the diameter of the closing self-holding channel 14 is far smaller than that of the closing electromagnetic valve channel and the opening oil discharge channel 21, the flow area is small, the leakage amount in the action process of the valve core can be ignored, the effect is only that the right moving area 12 and the working oil area 7 are communicated when the valve core 4 is in the opening position or the closing position, and the pressure loss caused by leakage in the right moving area 12 is supplemented, so that the valve core always receives the leftward hydraulic acting force in the right moving area 12.
As shown in fig. 4, a check valve 22 is connected in series to the opening oil drain channel 21, the check valve 22 has an oil inlet and an oil drain outlet, the oil inlet is communicated with the right moving area 12, the oil drain outlet is communicated with the normal and low pressure oil 6 area for draining the oil in the right moving area 12, and the opening oil drain channel 21 and the solenoid valve oil drain channel 26 also have a common section. The check valve 22 is integrated in the valve body 1 and comprises a valve ball 23 and a valve ball spring 24, the valve ball spring 24 pushes the valve ball 23 at the oil inlet, and the communication and the stop of the oil inlet and the oil outlet are realized by the valve ball 23. When the pressure at one side of the oil inlet of the check valve 22 is greater than the set pressure of the check valve 22, the check valve 22 is opened, and the right moving area 12 is communicated with the normal-low pressure oil area 6; when the pressure at the oil inlet side of the check valve 22 is lower than the set pressure of the check valve 22, the check valve 22 is closed, and the right moving area 12 is isolated from the normal-low pressure oil area 6. The set pressure of the check valve 22 is greater than the pressure of the normal high-pressure oil area of the hydraulic operating mechanism, after the closing electromagnetic valve 16 acts, the right moving area 12 is communicated with the normal high-pressure oil area 8, at this time, the check valve 22 can be kept closed, and the high-pressure oil in the right moving area 12 cannot leak to the normal low-pressure oil area 6, so that the hydraulic control valve is ensured to be closed smoothly; meanwhile, when the hydraulic control valve is opened, the valve core 4 moves rightwards under the action of the opening driving rod 15 to extrude oil in the right moving area 12, so that the hydraulic pressure is higher than the opening pressure of the check valve 22, the check valve 22 can be opened, and the situation that the hydraulic control valve cannot be opened due to the fact that a dead space is formed in the right moving area 12 is avoided.
When the effective end surface area of the valve core 4 exposed in the left moving area 11 is A1, the effective end surface area of the valve core 4 exposed in the normal-high pressure oil area 8 is A2, and the effective end surface area of the valve core 4 exposed in the right moving area 12 is A3, A1 is greater than A2, and A1 is less than A2+ A3; the effective end surface area is the net area of the end surface of the valve core 4 exposed in the left moving area 11, the normal-high pressure oil area 8 or the right moving area 12 for generating the overall hydraulic acting force in the left-right direction on the valve core 4 when the valve core 4 moves leftwards or rightwards to the limit position. For example, in the case of a1, the left end surface of the valve element 4 is completely exposed in the left displacement area 11, and therefore, a1 is the area of the left end opening of the left end surface of the valve element 4, excluding the left displacement area passage 13, which can generate an overall rightward force on the valve element 4 by the high-pressure oil; for a2, namely when the valve core 4 moves to the right to the limit position, the right end face of the large diameter section of the valve core 4 is exposed to the annular area of the normal and high pressure oil area 8, excluding the cross-sectional area of the part of the valve core 4 inserted into the right moving area, and the area can generate the integral leftward acting force on the valve core 4 under the action of the high pressure oil; for A3, that is, when the valve core 4 moves to the extreme position to the left, the right end face of the large diameter section of the valve core 4 is exposed to the area of the working oil zone 7, in this embodiment, the opening position sealing valve port 9 and the closing position sealing valve port 10 are the same in size and are in line sealing fit with the valve core 4, so A3= a 2; the area of the annular end surface corresponding to a4, namely the part of the right end of the valve core 4 connected with the opening drive rod 15. If the opening actuating rod 15 is provided with a shoulder at the position for guiding engagement with the valve body and the left end face of the shoulder is exposed in the right moving area 12, a4 should be subtracted by the area of the left annular end face of the shoulder.
The driving module 5 is a repulsion module and makes unidirectional motion, and comprises a coil and a repulsion disc 18, and the repulsion disc 18 can realize bidirectional motion under the respective driving of the coil. The repulsion plate 18 is connected with a transmission rod 19, and the transmission rod 19 is connected with the opening driving rod 15 through a connecting flange 20. The travel of the repulsion module is larger than that of the valve core 4, namely the repulsion module is stopped by the stop of the valve core 4 and the valve sleeve.
In the opening position shown in fig. 1, the closing solenoid valve 16 is energized to operate, so that the solenoid valve oil inlet channel 25 is communicated with the solenoid valve oil outlet channel 26, further the normal-high pressure oil zone 8 is communicated with the right moving zone 12, the working oil path interface Z is communicated with the high pressure oil path interface P, hydraulic oil in the normal-high pressure oil zone 8 enters the right moving zone 12 through the closing solenoid valve 16, because a1 is more than A3+ a4, the valve core 4 is wholly acted by leftward hydraulic force, the valve core 4 is tightly pressed at the closing position sealing valve port 10, hydraulic misoperation control valves caused by valve port leakage are avoided, and the self-closing holding channel 14 can supplement pressure loss caused by leakage in the right moving zone 12, so that the valve core always receives leftward hydraulic acting force in the right moving zone 12. In the closing process, a small amount of hydraulic oil leaks from the closing self-holding channel 14, but the flow area of the closing self-holding channel 14 is small, so that the leakage amount can be ignored.
When the opening operation is carried out, the driving rod 19 of the repulsion module pulls the opening driving rod 15 to act through the connecting flange 20, the valve core 4 moves towards the right side shown in figure 1, the oil in the right moving area 12 is extruded, the hydraulic pressure is higher than the opening pressure of the check valve 22, the check valve 22 is opened, the valve core 4 moves towards the right side to the position shown in figure 1, the sealing valve port 9 at the opening position is closed, the sealing valve port 10 at the closing position is opened, the working oil way interface Z is communicated with the low-pressure oil way interface T, the rodless cavity of the working cylinder is low-pressure oil, the high-pressure oil in the rod cavity drives the working cylinder to realize the opening, the high-pressure oil is still in the channel 13 of the left moving area and the channel 11 of the left moving area at the moment, the low-pressure oil is in the right moving area 12, therefore, the valve core 4 is acted by the hydraulic force towards the right, and the valve core 4 is tightly pressed at the sealing valve port 9 at the opening position, so that the malfunction of the hydraulic control valve caused by the leakage of the valve port is avoided.
Example 2 of an embodiment of the hydraulic control valve in the present invention:
as shown in fig. 5, the present embodiment is different from embodiment 1 in that in embodiment 1, the opening driving lever 15 and the repulsive force module are disposed at the right side of the valve core 4, and the left moving area passage 13 is disposed in the valve core 4, whereas in this embodiment, the opening driving lever 15 and the repulsive force module are disposed at the left side of the valve core 4, and in order to avoid the influence of the opening driving lever 15 on the left moving area passage 13, the left moving area passage 13 is disposed in the valve body and has a section in common with the solenoid valve oil inlet passage 25; due to the influence of the setting position of the opening drive rod 15, the effective end surface area A1 is reduced, A4 is increased, but A1> A2 is still satisfied, and A1< A3+ A4. The operation process of the valve core 4 in this embodiment is basically the same as that in embodiment 1, except that the repulsion module pushes the opening driving rod 15 to operate during opening.
Example 3 of hydraulic control valve in the present invention:
as shown in fig. 6, the present embodiment is different from embodiment 2 in that in embodiment 2, the opening drive rod 15 is fixedly connected to the left side of the valve core 4, and in this embodiment, the opening drive rod 15 is arranged separately from the valve core 4, a gap is provided between the opening drive rod 15 and the end surface of the corresponding end of the valve core 4, the strokes of the repulsion modules are all greater than the stroke s of the valve core 4, when the hydraulic control valve is in the opening state, a gap s + δ is provided between the opening drive rod 15 and the left end surface of the valve core 4, and the repulsion module is stopped by the valve core 4 and the valve body; in addition, the left shift area passage 13 arrangement remains disposed within the spool 4, and still satisfies the effective end surface area a1> a2, and a1< A3+ a 4.
In the above embodiment, the check valve 22 is integrated in the valve body, and in other embodiments, the check valve 22 may be disposed outside the valve body 1, and may be disposed in the form of a closing solenoid valve 16, for example, and may communicate with the right moving area 12 through a communication passage.
In the above embodiment, the oil discharge port communicates with the normal-low pressure oil region through the oil discharge passage in the valve body, and in other embodiments, the check valve 22 may be provided with a separate oil discharge passage connected to the normal-low pressure oil region 6 or directly connected to the oil tank.
In the above embodiments, the closing self-holding channel is disposed on the valve sleeve, and in other embodiments, the closing self-holding channel may also be disposed on the valve main body 1.
The embodiment of the hydraulic operating mechanism of the invention comprises: the hydraulic operating mechanism comprises: the working cylinder is used for driving the circuit breaker to act; and a hydraulic control valve for controlling extension and contraction of the working cylinder, wherein the hydraulic control valve is the hydraulic control valve in any one embodiment of the hydraulic control valve, and is not specifically described here.
The above description is only a preferred embodiment of the present application, and not intended to limit the present application, the scope of the present application is defined by the appended claims, and all changes in equivalent structure made by using the contents of the specification and the drawings of the present application should be considered as being included in the scope of the present application.
Claims (10)
1. A hydraulic control valve comprising:
the valve comprises a valve body, wherein a normal-low pressure oil area, a working oil area, a normal-high pressure oil area and a valve core moving area are arranged in the valve body, and the valve core moving area is a closed area and is arranged at the end part of a valve core and used for providing a space for the sliding of the valve core;
the valve core is arranged in the valve body in a sliding manner;
the side of the hydraulic control valve provided with the normal low pressure oil area is the left side, and the side provided with the normal high pressure oil area is the right side, so that the valve core moving area comprises a left side moving area and a right side moving area which are respectively arranged at the left end and the right end of the valve core;
the closing electromagnetic valve is used for communicating the high-pressure side moving area with the normal-high pressure oil area so as to change the left-right direction hydraulic acting force applied to the end face of the valve core positioned in the high-pressure side moving area, so that the valve core moves leftwards to realize closing of the working cylinder;
the method is characterized in that:
the hydraulic control valve also comprises a brake-separating driving rod, the brake-separating driving rod is arranged at the left end or the right end of the valve core, corresponds to the end face of the valve core, and is used for pushing and/or pulling the valve core to move towards the right under the driving of the driving module so as to realize the brake separation of the working cylinder;
the opening driving rod penetrates through the side wall of the corresponding left side moving area or right side moving area along the left-right direction in a guiding mode, and is in dynamic sealing fit with the side wall of the valve core moving area;
the right moving area is connected with a check valve, the check valve is provided with an oil inlet and an oil outlet, the oil inlet is communicated with the right moving area, and the oil outlet is used for discharging oil in the right moving area;
the check valve has an opening pressure higher than the operating pressure of the normal-high pressure oil region and is adapted to open under hydraulic pressure generated by movement of the spool when the spool moves rightward.
2. The hydraulic control valve of claim 1, wherein: and the valve body is provided with an oil discharge channel, and the oil discharge port is communicated with the normal and low pressure oil areas through the oil discharge channel.
3. The hydraulic control valve of claim 2, wherein: the check valve is integrated in the valve body.
4. Hydraulic control valve according to claim 1 or 2 or 3, characterized in that: a closing self-holding channel is arranged on the valve body and/or the valve core and communicates the right moving area with the working oil area;
and the flow area of the closing self-holding channel is smaller than the oil discharge flow area of the check valve.
5. The hydraulic control valve of claim 4, wherein: a left moving area channel is arranged on the valve body and/or the valve core and communicates the left moving area with the normal-high pressure oil area;
the effective end face area of the valve core exposed in the left valve core moving area is A1, the effective end face area of the valve core exposed in the normal and high pressure oil area when the valve core moves to the right to the limit position is A2, the effective end face area of the valve core exposed in the working oil area when the valve core moves to the left to the limit position is A3, the effective end face area of the valve core exposed in the right moving area is A4, A1 is greater than A2, and A1 is less than A3+ A4;
the effective end surface area is the net area of the valve core exposed in the left valve core moving area, the normal-high pressure oil area, the working oil area or the right moving area when the valve core moves to the limit position leftwards or rightwards, and the end surface of the valve core is used for generating the integral hydraulic acting force in the left-right direction on the valve core.
6. The hydraulic control valve of claim 4, wherein: the valve body comprises a valve main body and a valve sleeve, and the closing self-holding channel is arranged on the valve sleeve.
7. Hydraulic control valve according to claim 1 or 2 or 3, characterized in that: the opening driving rod is arranged at the right end of the valve core and is fixedly connected with the valve core.
8. Hydraulic control valve according to claim 1 or 2 or 3, characterized in that: the opening driving rod is arranged at the left end of the valve core and is arranged separately from the valve core, and a gap is formed between the opening driving rod and the end face of the left end of the valve core.
9. The hydraulic pressure operating mechanism includes:
the working cylinder is used for driving the circuit breaker to act;
the hydraulic control valve is used for controlling the extension and contraction of the working cylinder;
the method is characterized in that: the hydraulic control valve is as defined in any one of claims 1 to 8.
10. The hydraulic operating mechanism of claim 9, wherein: the hydraulic operating mechanism comprises a driving module for driving a brake-separating driving rod of the hydraulic control valve to act, and the driving module is a repulsion module.
Applications Claiming Priority (2)
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| CN2020102032182 | 2020-03-20 | ||
| CN202010203218 | 2020-03-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114360975A (en) * | 2022-01-12 | 2022-04-15 | 山东泰开高压开关有限公司 | Quick circuit breaker for low-frequency power transmission system |
| CN114446728A (en) * | 2021-12-20 | 2022-05-06 | 河南平高电气股份有限公司 | GIS circuit breaker dish spring hydraulic pressure mechanism energy storage pressure control device and circuit breaker |
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| CN114446728B (en) * | 2021-12-20 | 2024-03-22 | 河南平高电气股份有限公司 | GIS circuit breaker dish spring hydraulic mechanism energy storage pressure control device and circuit breaker |
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| CN112503044B (en) | 2022-12-16 |
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