CN112503043B - Hydraulic operating mechanism and hydraulic control valve - Google Patents
Hydraulic operating mechanism and hydraulic control valve Download PDFInfo
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- CN112503043B CN112503043B CN202011246792.2A CN202011246792A CN112503043B CN 112503043 B CN112503043 B CN 112503043B CN 202011246792 A CN202011246792 A CN 202011246792A CN 112503043 B CN112503043 B CN 112503043B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 23
- 238000007789 sealing Methods 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 10
- 230000008602 contraction Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 87
- 230000009471 action Effects 0.000 description 22
- 238000006073 displacement reaction Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000004044 response Effects 0.000 description 5
- 239000010720 hydraulic oil Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
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- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Magnetically Actuated Valves (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The invention relates to a hydraulic operating mechanism and a hydraulic control valve. The hydraulic control mechanism comprises a working cylinder and a hydraulic control valve, the hydraulic control valve comprises a valve body, a valve core and a driving rod, a left side moving area and a right side moving area are arranged in the valve body, and the driving rod is arranged corresponding to the end face of the valve core and is used for pushing and/or pulling the valve core to move under the driving of a driving module; a left moving area channel and a right moving area channel are arranged on the valve body and/or the valve core; 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 technical scheme can solve the problems of inconvenient assembly and maintenance and high cost of the hydraulic control valve of the existing hydraulic operating mechanism.
Description
Technical Field
The invention relates to a hydraulic operating mechanism and a hydraulic control valve.
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 is an electromagnetic control valve, and the communication state of a channel in the valve body is changed by the electromagnetic valve to realize the reversing of the hydraulic control valve. 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 first-stage valve, the action of the second-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 (i.e. the high-pressure oil hole in the above patent) and a pressure holding wing are further provided in the valve core, the holding oil hole communicates the normal-high pressure oil region with the valve core moving region, so that the valve core is kept in an open state by means of a hydraulic pressure difference between the valve core moving region and the normal-high pressure oil region, and the pressure holding wing is used for keeping the valve core in a closed state when the valve core is closed.
However, in the repulsive force directional control valve, the valve core needs to be provided with the pressure retaining wing, and the diameter of the pressure retaining wing is larger, so that the valve core needs to be made into a split type, the requirement on manufacturing precision is higher, and the assembly is more complex.
Disclosure of Invention
The invention aims to provide a hydraulic operating mechanism, which solves the problems of inconvenient assembly and maintenance and high cost of a hydraulic control valve of the traditional hydraulic operating mechanism; meanwhile, the invention also aims to provide a hydraulic control valve, which solves the problems of high requirement on manufacturing precision and complex assembly caused by the requirement of arranging a pressure retaining wing in the existing hydraulic control valve.
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 hydraulic control valve also comprises a driving rod, the driving rod is arranged corresponding to the end face of the valve core and is used for pushing and/or pulling the valve core to act under the driving of the driving module;
the driving rod is arranged at the left end and/or the right end of the valve core, and is guided to penetrate through the side wall of the valve core moving area at the corresponding side along the left-right direction and is in dynamic sealing fit with the side wall of the valve core moving area;
a left moving area channel and a right moving area channel are arranged on the valve body and/or the valve core; the left moving area channel communicates the left moving area with the normal-high pressure oil area, and the right moving area channel communicates the right moving area with the working 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.
Has the advantages that: by adopting the technical scheme, after the hydraulic control valve is switched on by arranging the right moving area and the right moving area channel, namely, when the valve core moves to the extreme position leftwards, the right moving area channel can communicate the right moving area with the working oil area, and at the moment, the right valve port of the valve core is opened, the working oil area is also high-pressure oil, therefore, the right moving area is also high-pressure oil, the high-pressure oil can simultaneously apply leftward hydraulic acting force to the valve core through the parts of the end surface of the valve core corresponding to A3 and A4, and the hydraulic force is greater than the overall rightward force to which a1 is subjected, so that the valve spool can be held in the closed position, and does not affect the action of the driving rod on the valve core, compared with the prior art, the pressure retaining wing is not needed to be arranged, the valve core is convenient to assemble, and the requirement on manufacturing precision is favorably reduced, the cost of the hydraulic operating mechanism is reduced, and the maintenance is convenient.
As a preferable technical scheme, the driving rod is fixedly connected to the left end of the valve core and used for pushing and pulling the valve core to act;
or the left end and the right end of the valve core are both provided with driving rods, and the driving rods on the two sides are both used for pushing the valve core to act.
Has the advantages that: by adopting the technical scheme, the position of the driving rod is convenient to flexibly set, and the effective end surface area of the corresponding part of the valve core is convenient to adjust.
As a preferred technical scheme, the left end and the right end of the valve core are both provided with driving rods, the driving rods and the valve core are arranged in a split mode, and intervals are arranged between the driving rods and the end faces of the corresponding ends of the valve core.
Has the advantages that: by adopting the technical scheme, the driving rod can not occupy the effective end surface area of the valve core, thereby being beneficial to reducing the volume and facilitating the parameter design of the valve core.
As a preferred technical solution, the driving module corresponding to the driving rod on the right side includes a return spring, and the return spring is used for driving the driving module to return to the right.
Has the advantages that: by adopting the technical scheme, the reset spring can ensure that each action of the driving module has the same stroke, so that the action precision of the hydraulic control valve is improved.
As a preferred technical scheme, a length adjusting structure is arranged between the output end of the driving module and the driving rod.
Has the advantages that: by adopting the technical scheme, the adjusting length adjusting structure can adjust the interval between the driving rod and the valve core, so as to finely adjust the action time of the repulsion valve and meet different opening and closing time requirements; in addition, through adjusting the length adjustment structure, the drive module can change the stop element, can rely on between case and the valve body to stop the position, also can rely on drive module self to stop the position, when relying on drive module self to stop the position, the terminal stroke of case relies on hydraulic oil to promote.
As a preferred technical solution, the stroke of the driving module is smaller than the stroke of the valve core.
Has the advantages that: by adopting the technical scheme, the valve core can move to the limit position later than the driving module, so that the impact between the valve core and the valve body is favorably reduced, and the service life is prolonged.
As a preferred technical solution, the driving module corresponding to the driving rod is a repulsive force module.
Has the advantages that: by adopting the technical scheme, the repulsion force module can realize higher action speed and meet the requirement of quick action of the hydraulic operating mechanism.
The hydraulic control valve adopts the following technical scheme:
a hydraulic control valve comprising:
the valve body is internally provided with a normal-low pressure oil area, a working oil area and a normal-high pressure oil area;
the valve core is arranged in the valve body in a sliding manner;
a valve core moving area is also arranged in the valve body, is a closed area and is arranged at the end part of the valve core and used for providing space for the sliding of the valve core;
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 hydraulic control valve also comprises a driving rod, the driving rod is arranged corresponding to the end face of the valve core and is used for pushing and/or pulling the valve core to act under the driving of the driving module;
the driving rod is arranged at the left end and/or the right end of the valve core, and is guided to penetrate through the side wall of the valve core moving area at the corresponding side along the left-right direction and is in dynamic sealing fit with the side wall of the valve core moving area;
a left moving area channel and a right moving area channel are arranged on the valve body and/or the valve core; the left moving area channel communicates the left moving area with the normal-high pressure oil area, and the right moving area channel communicates the right moving area with the working 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.
Has the advantages that: by adopting the technical scheme, through the arrangement of the right moving area channel and the right moving area channel, after the hydraulic control valve is switched on, namely the valve core moves to the limit position leftwards, the right moving area channel can communicate the right moving area with the working oil area, at the moment, the right valve port of the valve core is opened, the working oil area is also high-pressure oil, so that the right moving area is also high-pressure oil, the high-pressure oil can simultaneously exert leftward hydraulic acting force on the valve core through the corresponding parts of the end surface of the valve core, A3 and A4, and the hydraulic acting force is greater than the integral rightward acting force received by A1, so that the valve core can be kept at the switching-on position and the action of the driving rod on the valve core is not influenced.
As a preferable technical scheme, the driving rod is fixedly connected to the left end of the valve core and used for pushing and pulling the valve core to act;
or the left end and the right end of the valve core are both provided with driving rods, and the driving rods on the two sides are both used for pushing the valve core to act.
Has the advantages that: by adopting the technical scheme, the position of the driving rod is convenient to flexibly set, and the effective end surface area of the corresponding part of the valve core is convenient to adjust.
As a preferred technical scheme, the left end and the right end of the valve core are both provided with driving rods, the driving rods and the valve core are arranged in a split mode, and intervals are arranged between the driving rods and the end faces of the corresponding ends of the valve core.
Has the advantages that: by adopting the technical scheme, the driving rod can not occupy the effective end surface area of the valve core, thereby being beneficial to reducing the volume and facilitating the parameter design of the valve core.
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 embodiment 2 of the hydraulic control valve of the present invention;
FIG. 5 is a schematic structural view of embodiment 3 of the hydraulic control valve of the invention;
FIG. 6 is an enlarged view of the structure at the valve body of FIG. 5;
FIG. 7 is a schematic configuration diagram of embodiment 4 of the hydraulic control valve of the invention;
the names of the components corresponding to the corresponding reference numerals in the drawings are: 1-a valve body, 2-a left valve sleeve, 3-a right valve sleeve, 4-a valve core, 5-a driving module, 6-a normal low pressure oil area, 7-a working oil area, 8-a normal high pressure oil area, 9-a separating brake position sealing valve port, 10-a closing brake position sealing valve port, 11-a left side moving area, 12-a right side moving area, 13-a left side moving area channel, 14-a right side moving area channel, 15-a driving rod, 16-a first coil, 17-a second coil, 18-a repulsive force disc, 19-a driving rod, 20-a connecting flange, 21-a reset spring, 22-an adjustable connecting rod, 23-a locking nut and 24-a stopping table.
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.
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; 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-high pressure oil area 8. The valve body is provided with a right displacement area passage 14, which is of a substantially U-shaped configuration, for communicating the right displacement area 12 with the working oil area 7.
The hydraulic control valve also comprises a driving rod 15, and the driving rod 15 is fixedly connected to the right end face of the valve core 4 and is used for pushing and pulling the valve core 4 to act under the driving of the driving module 5; the drive rod 15 is guided in the left-right direction through the side wall of the right moving area 12 and is in dynamic sealing engagement with the side wall of the right moving area 12.
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 A4, A1 is greater than A2, and A1 is less than A2+ A4; 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 region 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 region passage 13, and this area can generate an overall force acting rightward 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 a4, i.e., the annular end surface corresponding to the portion of the right end of the spool 4 connected to the drive lever 15. If the drive rod 15 is provided with a shoulder at the location for guiding engagement with the valve body and the left end face of the shoulder is exposed in the right displacement area 12, a4 should be subtracted from the area of the left annular end face of the shoulder.
The driving module 5 is a repulsion module, and comprises a first coil 16, a second coil 17 and a repulsion disc 18, wherein the repulsion disc 18 is arranged between the first coil 16 and the second coil 17, and can realize bidirectional movement under the driving of the first coil 16 and the second coil 17 respectively. The repulsion plate 18 is connected with a transmission rod 19, and the transmission rod 19 is connected with the 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.
When the valve is opened, the repulsion module is electrified to act, the driving rod 19 of the repulsion module pushes the driving rod 15 to act through the connecting flange 20, the valve core 4 moves towards the left side of the drawing, the sealing valve port 9 at the opening position is opened, the sealing valve port 10 at the closing position is closed, the working oil path interface Z is communicated with the high-pressure oil path interface P, and high-pressure oil in the energy accumulator enters a rodless cavity of a working cylinder of the hydraulic operating mechanism to drive the working cylinder to realize closing. At this time, high-pressure oil exists in the left moving area channel 13 and the left moving area 11, high-pressure oil also exists in the right moving area channel 14 and the right moving area 12, and A1 is less than A3+ A4, so that the valve core 4 is subjected to leftward hydraulic force on the whole valve core 4, and the valve core 4 is tightly pressed at the closing position sealing valve port 10, and the hydraulic control valve is prevented from misoperation due to valve port leakage.
Similarly, when the opening operation is performed, the driving rod 19 of the repulsion module pulls the driving rod 15 to act through the connecting flange 20, the valve core 4 moves towards the right side of the drawing, the valve core 4 moves towards the right side to the position shown in the drawing, the opening position sealing valve port 9 is closed, the closing position sealing valve port 10 is opened, the working oil path interface Z is communicated with the low-pressure oil path 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 operation, at the moment, the high-pressure oil still exists in the left moving area channel 13 and the left moving area 11, the low-pressure oil exists in the right moving area channel 14 and the right moving area 12, as A1 is larger than A2, the valve core 4 is acted by the hydraulic force towards the right, and the valve core 4 is tightly pressed at the opening position sealing valve port 9, so that the misoperation of the control valve caused by the leakage of the valve port is avoided.
Example 2 of hydraulic control valve in the present invention:
as shown in fig. 4, the present embodiment is different from embodiment 1 in that in embodiment 1, the driving lever 15 and the repulsive force module are disposed on 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 driving lever 15 and the repulsive force module are disposed on the left side of the valve core 4, and in order to avoid the influence of the driving lever 15 on the left moving area passage 13, the left moving area passage 13 is disposed in the valve body, the effective end surface area a1 is reduced, the a4 is increased, but a1> a2 is still satisfied, and a1< A3+ a 4. The action process of the valve core 4 in this embodiment is basically the same as that in embodiment 1, except that the repulsion module pulls the driving rod 15 to act during closing, and pushes the driving rod 15 to act during opening.
Example 3 of hydraulic control valve in the present invention:
as shown in fig. 5 and 6, the present embodiment is different from embodiment 1 in that in embodiment 1, the driving rod 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 the present embodiment, the driving rod 15 and the repulsive force module are disposed at both the left side and the right side of the valve core 4, and each driving rod 15 is disposed separately from the corresponding valve core 4, and a space is provided between the driving rod 15 and the corresponding end face of the valve core 4; at the moment, the repulsion modules move in a single direction, and the strokes of the repulsion modules are larger than the stroke of the valve core 4, namely the repulsion modules stop by the valve core 4 and the valve body; because the left driving rod 15 can move leftwards under the action of high-pressure oil in the left moving area 11 to ensure the leftward reset of the left repulsion module, and the right driving rod 15 cannot move rightwards depending on the pressure of hydraulic oil after the brake is opened, the right repulsion module comprises a reset spring 21, and the reset spring 21 is used for driving the driving module 5 to reset rightwards; the stroke of the valve core 4 is s, when the hydraulic control valve is in a brake-off state, a gap delta is formed between the driving rod 15 on the right side and the right end face of the valve core 4, and in order to guarantee the brake-on and brake-off action time, a gap s + delta is formed between the driving rod 15 on the left side and the left end face of the valve core 4; in addition, the effective end face area a1 is reduced, but still satisfies a1> a2, and a1< A3+ a 4. The action process of the valve core 4 in the embodiment is basically the same as that in the embodiment 1, except that the repulsion modules push the driving rods 15 on the corresponding sides to act when the brake is opened and closed.
Example 4 of hydraulic control valve in the present invention:
as shown in fig. 7, the difference between this embodiment and embodiment 3 is that in this embodiment, a length adjusting structure is disposed between the output end of the repulsion module and the driving rod 15, the length adjusting structure includes an adjustable connecting rod 22, and opposite threads are disposed at two ends of the adjustable connecting rod 22 and are respectively connected to the driving rod 15 and the driving rod 19 by threads; the adjustable connecting rod 22 is also provided with a locking nut 23 for realizing locking and positioning after being adjusted in place; the distance between the driving rod 15 and the corresponding end of the valve core 4 can be adjusted by adjusting the wrenching position in the middle of the adjustable connecting rod 22, different opening and closing time requirements can be met, the stop element can be changed, the stop between the valve core 4 and the valve body can be relied on, the self-stop position of the driving module 5 can be realized by the stop table 24 arranged on the driving module 5, and the tail end stroke of the valve core 4 is pushed by hydraulic oil when the self-stop position of the driving module 5 is relied on.
In the above embodiment 3, the driving rod 15 and the valve core 4 are separately arranged, and in other embodiments, the driving rod 15 and the valve core 4 may also be fixedly connected, so that the repulsion mechanism on one side is in an extended state.
In the above embodiment, the driving module 5 is a repulsive force module, and in other embodiments, other driving modules, such as an electromagnet, may be adopted according to the requirement of the switching-on speed.
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 (8)
1. 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 method is characterized in that:
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 hydraulic control valve also comprises a driving rod, the driving rod is arranged corresponding to the end face of the valve core and is used for pushing and/or pulling the valve core to act under the driving of the driving module;
the driving rod is fixedly connected to the left end or the right end of the valve core, or is arranged at the left end and the right end of the valve core simultaneously, and is guided along the left-right direction to penetrate through the side wall of the valve core moving area at the corresponding side and is in dynamic sealing fit with the side wall of the valve core moving area;
a left moving area channel is arranged on the valve body and/or the valve core, and a right moving area channel is arranged on the valve body; the left moving area channel communicates the left moving area with the normal-high pressure oil area, and the right moving area channel communicates the right moving area with the working 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.
2. The hydraulic operating mechanism of claim 1, wherein: the left end and the right end of the valve core are both provided with driving rods, the driving rods and the valve core are arranged in a split mode, and intervals are arranged between the driving rods and the end faces of the corresponding ends of the valve core.
3. The hydraulic operating mechanism of claim 2, wherein: the driving module corresponding to the driving rod on the right side comprises a return spring, and the return spring is used for driving the driving module to return towards the right.
4. The hydraulic operating mechanism of claim 3, wherein: a length adjusting structure is arranged between the output end of the driving module and the driving rod.
5. The hydraulic operating mechanism according to claim 2, 3 or 4, wherein: the stroke of the driving module is smaller than that of the valve core.
6. The hydraulic operating mechanism according to any one of claims 1 to 4, wherein: the driving module corresponding to the driving rod is a repulsion module.
7. A hydraulic control valve comprising:
the valve body is internally provided with a normal-low pressure oil area, a working oil area and a normal-high pressure oil area;
the valve core is arranged in the valve body in a sliding manner;
a valve core moving area is also arranged in the valve body, is a closed area and is arranged at the end part of the valve core and used for providing space for the sliding of the valve core;
the method is characterized in that:
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 hydraulic control valve also comprises a driving rod, the driving rod is arranged corresponding to the end face of the valve core and is used for pushing and/or pulling the valve core to act under the driving of the driving module;
the driving rod is fixedly connected to the left end or the right end of the valve core, or is arranged at the left end and the right end of the valve core simultaneously, and is guided along the left-right direction to penetrate through the side wall of the valve core moving area at the corresponding side and is in dynamic sealing fit with the side wall of the valve core moving area;
a left moving area channel is arranged on the valve body and/or the valve core, and a right moving area channel is arranged on the valve body; the left moving area channel communicates the left moving area with the normal-high pressure oil area, and the right moving area channel communicates the right moving area with the working 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.
8. The hydraulic control valve of claim 7, wherein: the left end and the right end of the valve core are both provided with driving rods, the driving rods and the valve core are arranged in a split mode, and intervals are arranged between the driving rods and the end faces of the corresponding ends of the valve core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/136266 WO2021184850A1 (en) | 2020-03-20 | 2020-12-14 | Hydraulic operating mechanism and hydraulic control valve |
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| CN202010202070 | 2020-03-20 | ||
| CN2020102020700 | 2020-03-20 |
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| CN202011246792.2A Active CN112503043B (en) | 2020-03-20 | 2020-11-10 | Hydraulic operating mechanism and hydraulic control valve |
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| CN113513511B (en) * | 2021-04-15 | 2023-09-26 | 浙大城市学院 | Piezoelectric stacking driving electro-hydraulic proportional valve |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2021184850A1 (en) | 2021-09-23 |
| CN112503043A (en) | 2021-03-16 |
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