CN114412862A - Ultrahigh pressure three-position three-way valve - Google Patents
Ultrahigh pressure three-position three-way valve Download PDFInfo
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- CN114412862A CN114412862A CN202111561054.1A CN202111561054A CN114412862A CN 114412862 A CN114412862 A CN 114412862A CN 202111561054 A CN202111561054 A CN 202111561054A CN 114412862 A CN114412862 A CN 114412862A
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- 238000007789 sealing Methods 0.000 claims abstract description 24
- 239000003921 oil Substances 0.000 claims description 150
- 239000010720 hydraulic oil Substances 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly 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
- F15B13/024—Pressure relief 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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
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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
- F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
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- Fluid-Pressure Circuits (AREA)
- Safety Valves (AREA)
Abstract
An ultrahigh pressure three-position three-way valve comprises a valve body, control pistons and control piston end covers, wherein the control pistons and the control piston end covers are correspondingly arranged at two ends of the valve body; adopt the release of superhigh pressure tribit three-way valve control for whole release work unit simple structure is reliable, do not need extra electrical control, can avoid the debugging difficulty and the potential safety hazard that the improper matching of electrical control system and valve member theory of operation caused, the sealed cone valve structure that adopts of superhigh pressure, replace the slide valve structure of two traditional logical leads to with the cone valve structure, system work is more reliable, and system pressure is higher its sealing performance better than more than the high pressure of system, sealing performance is obviously superior to the slide valve + sealing washer form of two logical leads to of traditional superhigh pressure, and can not appear along with operating time increase the sealing washer damage, risk such as the slide valve card is died.
Description
Technical Field
The invention belongs to the technical field of hydraulic reversing valves, and particularly relates to an ultrahigh pressure three-position three-way valve, in particular to an ultrahigh pressure reversing valve used in a pressure relief process of a synthetic process in the artificial diamond industry.
Background
The synthetic equipment of the artificial diamond in China is a cubic hydraulic press which adopts an ultrahigh pressure hydraulic system with the oil pressure reaching 100 MPa. The working process of the hydraulic system mainly comprises the following steps: the oil cylinder is emptied, the pressure is quickly increased to 6MPa, then the overpressure is slowly increased to about 100MPa and kept, and finally the pressure relief process is carried out.
The current mainstream pressure relief device is provided with a three-stage pressure relief valve and a high-precision pressure relief valve driven by a stepping motor, and is called servo relief hereinafter for short. The three-level pressure relief valve is most widely applied, the pressure relief speed can be controlled within the range of 0.15-2.5MPa/s, and the three-level pressure relief valve is suitable for the process with higher pressure relief speed and low requirement on pressure control precision (control deviation +/-0.30 MPa). The servo pressure relief valve is a high-precision pressure relief valve developed in recent years, the pressure relief speed is controlled by an annular gap between a conical surface of about 40 degrees of a valve core and a small hole D2.5 of a valve seat, and the gap can be adjusted in real time in the pressure relief process, so that the control precision is high, the pressure relief speed can be controlled within the range of 0.05-1MPa/s, and the servo pressure relief valve is suitable for the process with low pressure relief speed and high requirement on the pressure relief precision (control deviation +/-0.10 MPa). Along with the increase of the cylinder diameter of a cubic apparatus main engine, the requirement on the control precision of a pressure relief process is higher and higher, and the application of servo relief in the industry is gradually increased. In order to improve the pressure relief control precision, the size of a small hole of a valve seat is not easy to be overlarge, the pressure relief precision can be ensured by the oil passing hole with the small diameter, a certain pressure relief speed is sacrificed, and particularly the pressure relief speed of a low-pressure section is too slow, so that the production efficiency is influenced. In summary, three-level unloading can realize rapid pressure relief with low precision, and servo unloading can realize slow pressure relief with high precision, thus limiting the application fields of the three-level unloading and the servo unloading.
The high-pressure oil inlet sides of the three-level unloading and the servo unloading are respectively provided with an ultrahigh-pressure two-position two-way valve which has good sealing performance and can ensure zero leakage before the pressure relief of the system begins, so that the system can operate stably and reliably. The ideal pressure relief valve requires high-precision and slow pressure relief speed of the middle-high pressure section, and quick pressure relief of the low pressure section, so that the auxiliary time is shortened, and the efficiency is improved.
In order to solve the problems, the pressure relief valve is required to meet the requirements of accurate and slow pressure relief in the medium-high pressure stage and quick pressure relief in the low pressure stage. The requirements of high regulation sensitivity and quick response of the pressure relief valve on accurate and slow pressure relief in the medium-high pressure stage and quick pressure relief in the low pressure stage are mutually contradictory and are not easy to realize.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an ultrahigh pressure three-position three-way valve which is used for switching an unloading channel of hydraulic oil, realizing accurate and slow pressure relief of a middle-high pressure section and quick pressure relief of a low pressure section, ensuring the safety of a system and improving the working efficiency.
In order to solve the technical problems, the invention adopts the technical scheme that:
an ultrahigh pressure three-position three-way valve comprises a valve body, control pistons and control piston end covers, wherein the control pistons and the control piston end covers are correspondingly arranged at two ends of the valve body;
the valve body is internally provided with an oil duct which is axially distributed, the front wall of the valve body is provided with an oil inlet P, the oil duct is divided into a left oil duct and a right oil duct by taking the oil inlet P as a boundary point, three oil passing pipes are arranged in the oil duct corresponding to the oil inlet P, the rear wall of the valve body is provided with an oil outlet A in the left oil duct, and the rear wall of the valve body is provided with an oil outlet B in the right oil duct;
the control piston and the control piston end cover are correspondingly arranged in an oil duct at the rear side of the ultrahigh pressure one-way valve, and an ultrahigh pressure sealing plug is arranged between the ultrahigh pressure one-way valve and the control piston.
The oil inlet P is connected with a high-pressure cavity of the cubic apparatus main engine, the oil outlet A is connected with a servo pressure relief valve, and the oil outlet B is connected with a low-pressure throttle valve.
When the system is in a non-working position, the control oil path A, B, T of the three-position four-way electromagnetic directional valve is in a communicated state, the rodless cavities of the control pistons on the left side and the right side are guaranteed to unload, the ultrahigh pressure one-way valves on the left side and the right side are in a closed state under the action of high-pressure oil and top end spring force, and the oil inlet P is disconnected with the oil outlet A and the oil outlet B.
When the system is in an ultrahigh pressure relief state, the electromagnet on the a side of the three-position four-way electromagnetic directional valve is electrified, oil is controlled to flow to the rodless cavity of the control piston on the left side to push the control piston to move, and the ultrahigh pressure one-way valve is jacked open;
ultrahigh-pressure hydraulic oil enters an oil outlet A through an oil pipe III and an ultrahigh-pressure one-way valve on the left side, and enters a servo pressure relief valve connected behind the oil outlet A through the oil outlet A to realize slow pressure relief;
correspondingly, the electromagnet on the side B of the three-position four-way electromagnetic reversing valve is free of electricity, oil is controlled to flow to the control piston rod cavity on the right side to be located at the right non-working position, the ultrahigh pressure one-way valve on the right side is guaranteed to be in a closed state, and the oil inlet P and the oil outlet B are disconnected.
When the pressure is relieved to a low-pressure section, the electromagnet on the side a of the three-position four-way electromagnetic reversing valve is powered off, the electromagnet on the side b of the three-position four-way electromagnetic reversing valve is powered on, and control oil flows to the rodless cavity of the control piston on the right side to push the control piston to move so as to jack the ultrahigh-pressure one-way valve on the right side;
ultrahigh-pressure hydraulic oil enters an oil outlet B through an oil pipe III and an ultrahigh-pressure one-way valve on the right side, and enters a low-pressure throttle valve connected behind the oil outlet B, so that the low-pressure section is quickly relieved;
correspondingly, an electromagnet on the side a of the three-position four-way electromagnetic reversing valve is free of electricity, oil is controlled to flow to the control piston rod cavity on the right side to enable the control piston rod cavity to be located in the left non-working position, the left ultrahigh pressure one-way valve is guaranteed to be in a closed state, and the oil inlet P and the oil outlet A are disconnected.
The ultrahigh pressure sealing plug adopts a cone valve structure.
High-pressure seals are arranged among the control piston, the control piston end cover and the valve body; and an ultrahigh pressure combined seal is arranged between the ultrahigh pressure seal plug and the valve body.
The invention has the beneficial effects that:
(1) this superhigh pressure tribit three-position three-way valve adopts superhigh pressure tribit three-way valve control release for whole release work unit simple structure is reliable, does not need extra electrical control, can avoid the debugging difficulty and the potential safety hazard that improper matching of electrical control system and valve member theory of operation caused. The ultrahigh-pressure three-position three-way valve is similar to a hydraulic control one-way valve structure, and an engineer with certain maintenance experience in the industry can quickly and conveniently maintain after a fault occurs, so that the fault shutdown time is shortened; the function required by ideal pressure relief can be realized only by using one ultrahigh pressure three-position three-way valve, and the conventional two ultrahigh pressure two-position two-way valves need two sets of complete valve parts and a large number of external oil pipes, occupy a large amount of space after being installed, are complex in pipelines and are inconvenient to maintain.
(2) The ultrahigh pressure seal adopts a cone valve structure, the cone valve structure is used for replacing the traditional two-position two-way sliding valve structure, the system works more reliably, the sealing performance is better when the system pressure is higher, the sealing performance is obviously superior to the traditional ultrahigh pressure two-position two-way sliding valve and sealing ring form, and the risks of sealing ring damage, sliding valve blocking and the like can not occur along with the increase of the working time. The traditional ultrahigh pressure two-position two-way reset completely depends on controlling an oil way, and when a system fails, the oil way cannot be reset and cut off at once, so that great potential safety hazards exist; according to the cone valve structure, the reset depends on the pressure difference and the spring force at two ends of the ultrahigh pressure one-way valve, and when a system fails (the rodless cavity of the control piston cannot supply oil), the ultrahigh pressure one-way valve can quickly reset and cut off an oil way by depending on the resultant force of the hydraulic force and the spring force generated by the pressure difference at the two ends, so that the safety of the system is ensured.
(3) The ultrahigh pressure three-position three-way valve can replace two sets of traditional pressure relief assemblies to realize the quick and slow pressure relief separation function, the oil circuit is simplified, and high and low pressure oil circuits are integrated inside the valve block, so that the hidden troubles of external pipeline interference, oil leakage and the like are avoided.
(4) The ultrahigh pressure three-position three-way function is realized by using a mechanical hydraulic structure, and the medium-pressure, high-pressure, safe and slow low-pressure section rapid pressure relief is realized by combining with servo relief, so that the working efficiency is improved on the premise of ensuring safety; two super high pressure check valves are coaxial to be arranged, reduce super high pressure pipeline quantity, avoid appearing super high pressure fabrication hole to avoid shutoff super high pressure fabrication hole, simple structure, reasonable.
(5) The pilot valve uses a standard three-position four-way electromagnetic directional valve, the operation is stable and reliable, the interlocking is realized in the two processes of quick and slow pressure relief, and the system is ensured not to have misoperation.
(6) The ultrahigh pressure sealing plug adopts the inner hexagon bolt principle, can be installed by using a conventional tool, does not need a special tool, and has the sealing and guiding functions.
(7) The ultrahigh pressure three-position three-way valve has an oil way selecting function, can realize oil way selection and switching under any pressure state, and is not limited to the use in the industry.
Drawings
FIG. 1 is an assembly view of the present invention;
FIG. 2 is ｃA schematic diagram of the connection of the three-position three-way valve P-A of the present invention;
FIG. 3 is a schematic diagram of the connection of the three-position three-way valve P-B of the present invention;
FIG. 4 is a schematic diagram of an internal control oil path of the ultrahigh pressure three-position three-way valve;
FIG. 5 is a simplified hydraulic sign for a super high pressure three position three way valve;
FIG. 6 is a hydraulic schematic of a super high pressure three position three way valve;
FIG. 7 is a partial schematic view of the ultra high pressure check valve when open;
FIG. 8 is a schematic structural view of the control piston;
FIG. 9 is a schematic structural view of a control piston end cap;
FIG. 10 is a schematic structural view of the ultra-high pressure sealing plug;
FIG. 11 is a schematic view of a three-pass tubing configuration.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
The present invention provides an ultrahigh pressure three-position three-way valve as shown in fig. 1 to 11.
The ultrahigh pressure three-position three-way valve comprises a valve body 4, and a control piston 1 and a control piston end cover 2 which are correspondingly arranged at two ends of the valve body 4, wherein the control piston 1 is driven by a three-position four-way electromagnetic directional valve; the oil passage that valve body 4 was inside to be equipped with the axial and lay and seted up oil inlet P on the antetheca of valve body 4, regard oil inlet P as the demarcation point with the oil passage divide into left side oil duct and right side oil duct, and install three in the oil duct that oil inlet P corresponds and pass through oil pipe 6, seted up oil-out A at the rear wall of valve body 4 in the left side oil duct, seted up oil-out B at the rear wall of valve body 4 in the right side oil duct.
A right-to-left ultrahigh-pressure one-way valve 5 is arranged between the three-way oil pipe 6 and the oil outlet A, a left-to-right ultrahigh-pressure one-way valve 5 is arranged between the three-way oil pipe 6 and the oil outlet B, the control piston 1 and the control piston end cover 2 are correspondingly arranged in an oil duct on the rear side of the ultrahigh-pressure one-way valve 5, an ultrahigh-pressure sealing plug 3 is also arranged between the ultrahigh-pressure one-way valve 5 and the control piston 1, a flow-through oil pipe 7 is also arranged between the ultrahigh-pressure sealing plug 3 and the ultrahigh-pressure one-way valve 5, and high-pressure seals a are arranged between the control piston 1 and the control piston end cover 2 as well as between the control piston 1 and the valve body 4; an ultrahigh pressure combined seal b is arranged between the ultrahigh pressure seal plug 3 and the valve body 4; the valve body 4 is provided with an oil inlet P, an oil outlet A and an oil outlet B, wherein the oil inlet P is connected with a high-pressure cavity of a cubic apparatus host, the rear part of the oil outlet A is connected with a servo pressure relief valve, and the rear part of the oil outlet B is connected with a low-pressure throttle valve.
When the ultrahigh pressure three-position three-way valve is in the neutral position, P, A, B are mutually disconnected, and the valve is similar to the O-shaped neutral position function of a conventional reversing valve. In the invention, the three-position four-way electromagnetic directional valve for pilot control adopts a three-position four-way valve with a DSG-01-3C4 middle position function, and the control oil path A, B, T is in a communicated state in the middle position, so that the rodless cavity unloading of the control piston 1 can be ensured. At this time, the ultrahigh pressure check valve 5 is in a closed state under the action of high pressure oil and a top end spring force, and the system has no leakage. In addition, at the moment that the ultrahigh pressure one-way valve 5 is closed, a trace amount of hydraulic oil enters the rod cavity of the control piston 1 and can push the control piston 1 to move, so that the control piston is ensured to be in a non-working position in a middle position.
When the ultrahigh pressure three-position three-way valve works, when the system is in an ultrahigh pressure relief state, an electromagnet on the a side of the three-position four-way electromagnetic directional valve is electrified, control oil flows to the left control piston 1.1 rodless cavity to push the control piston 1.1 to move, the left ultrahigh pressure one-way valve 5.1 is jacked open, ultrahigh pressure hydraulic oil passes through the three oil pipes 6, the ultrahigh pressure one-way valve 5.1 enters an oil outlet A and enters a servo relief valve connected behind the ultrahigh pressure one-way valve through the oil outlet A, the opening degree of a valve needle is adjusted by a stepping motor, the pressure relief speed is controlled, and slow pressure relief is realized.
Meanwhile, the control oil passing through the three-position four-way electromagnetic directional valve is led to the rod cavity of the right control piston 1.2 from the right side to ensure that the control oil is located at the right non-working position, the left ultrahigh pressure one-way valve 5.1 is ensured to be in a closed state, and the oil inlet P and the oil outlet B are disconnected.
When the pressure is relieved to a low-pressure section, the electromagnet on the a side of the three-position four-way electromagnetic reversing valve loses power, the electromagnet on the B side is powered on simultaneously, the control oil flows to the rodless cavity of the right control piston 1.2 to push the right control piston 1.2 to move, the right ultrahigh-pressure check valve 5.2 is jacked open, ultrahigh-pressure hydraulic oil passes through the three-way oil pipe 6 and the right ultrahigh-pressure check valve 5.2 to enter the oil outlet B and then enters the low-pressure throttle valve connected behind the oil outlet B, the opening of the low-pressure throttle valve is large, and the low-pressure section is relieved quickly.
Meanwhile, the control oil passing through the three-position four-way electromagnetic directional valve goes to the rod cavity of the left control piston 1.1 from the left side to ensure that the control oil is located at a left non-working position, the left ultrahigh pressure one-way valve 5.1 is ensured to be in a closed state, and the oil inlet P and the oil outlet A are disconnected. According to the invention, the oil paths of the oil outlet A and the oil outlet B are interlocked, so that when the ultrahigh pressure section slowly releases pressure, the quick pressure release loop (P-B) is safely and reliably in a closed state, the pressure release system is ensured to realize safe and slow pressure release in a medium-high pressure state, and meanwhile, quick pressure release in a low pressure state is realized, and the working efficiency is improved.
More specifically, as shown in fig. 1 to 11, in the specific embodiment provided by the present invention, the ultrahigh pressure sealing plug is responsible for sealing ultrahigh pressure hydraulic oil and guiding the control piston 1 to prevent the valve body from being stuck due to inclination in the movement process, the control piston 1 is responsible for pushing the ultrahigh pressure one-way valve 5 to act, the ultrahigh pressure one-way valve 5 is responsible for opening and cutting off an oil path, the three-way oil pipe 6 is responsible for distributing oil from the oil inlet P to the two paths of the oil outlet a and the oil outlet B, and the pilot three-position four-way electromagnetic valve is a standard component.
When the ultrahigh pressure three-position three-way valve is in the middle position, the three oil ports P, A, B are not communicated with each other, the specific principle is as shown in fig. 1, the control pistons are all in the non-working positions, the ultrahigh pressure one-way valve is in the closing state under the action of the top end spring force and the pressure difference between the two sides (hydraulic oil inevitably has pressure loss through the valve element, and the pressure difference is generated between the two sides), and the closing is more reliable as the system pressure is higher.
The system needs to slowly release pressure in a medium-pressure state and a high-pressure state, at the moment, an electromagnet (shown in a figure 2) on the a side of the three-position four-way electromagnetic valve is electrified, an electromagnet on the b side is not electrified, a control oil path c in the figure 4 is filled with low-pressure control hydraulic oil to push a left control piston 1.1 and a right control piston 1.2 to move rightwards, and the left control piston 1.1 jacks a left ultrahigh-pressure one-way valve 5.1; the right control piston 1.2 is kept at a right non-working position, so that the right ultrahigh pressure one-way valve 5.2 is ensured to be in a closed state without being influenced by external force, an oil way P-A is communicated, an oil way P-B is disconnected (in a state shown in figure 4), and the system slowly releases pressure through a subsequent servo pressure relief valve.
The system needs to be rapidly relieved in a low-pressure state, at the moment, the electromagnet on the b side (shown in figure 3) of the three-position four-way electromagnetic valve is electrified, the electromagnet on the a side is not electrified, the control oil path d in figure 4 is filled with low-pressure control hydraulic oil to push the left control piston 1.1 and the right control piston 1.2 to move left, and the right control piston 1.2 jacks the right ultrahigh-pressure check valve 5.2 (the starting state is shown in figure 7); the left control piston 1.1 is kept at a left end non-working position, so that the left ultrahigh pressure one-way valve 5.1 is ensured to be in a closed state without being influenced by external force, an oil way P-B is communicated, a P-A is disconnected (in a state shown in figure 3), and the system is quickly released.
The ultrahigh pressure three-position three-way valve is adopted to control pressure relief, so that the whole pressure relief working unit is simple and reliable in structure, extra electrical control is not needed, and debugging difficulty and potential safety hazards caused by improper matching of an electrical control system and a valve working principle can be avoided. The ultrahigh-pressure three-position three-way valve is similar to a hydraulic control one-way valve structure, and an engineer with certain maintenance experience in the industry can quickly and conveniently maintain after a fault occurs, so that the fault shutdown time is shortened. The function required by ideal pressure relief can be realized only by using one ultrahigh pressure three-position three-way valve, and the conventional two ultrahigh pressure two-position two-way valves need two sets of complete valve parts and a large number of external oil pipes, occupy a large amount of space after being installed, are complex in pipelines and are inconvenient to maintain.
The ultrahigh pressure seal adopts a cone valve structure, the sealing performance is better when the system pressure is higher, the sealing performance is obviously superior to that of the traditional ultrahigh pressure two-position two-way sliding valve and sealing ring form, and the risks of sealing ring damage, sliding valve locking and the like can not occur along with the increase of the working time. Two logical resets of two of tradition superhigh pressure rely on the control oil circuit completely, can't reset immediately when the system breaks down and cut off the oil circuit, have very big potential safety hazard. According to the cone valve structure, the reset depends on the pressure difference and the spring force at two ends of the ultrahigh-pressure one-way valve 5, when a system fails (the control piston is provided with a rodless cavity and cannot supply oil), the ultrahigh-pressure one-way valve can quickly reset and cut off an oil way by means of the resultant force of the hydraulic force and the spring force generated by the pressure difference at the two ends, and the safety of the system is guaranteed.
Where the words "first", "second", etc. are used in this patent to define parts, those skilled in the art will recognize that: the use of "first" and "second" is merely for convenience in describing the invention and to simplify the description, and the words are not intended to have a special meaning.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents.
In the description of the present invention, it is to be understood that the terms "front", "rear", "left", "right", "center", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the scope of the present invention.
Claims (7)
1. An ultrahigh pressure three-position three-way valve is characterized in that: the electromagnetic directional control valve comprises a valve body, control pistons and control piston end covers, wherein the control pistons and the control piston end covers are correspondingly arranged at two ends of the valve body;
the valve body is internally provided with an oil duct which is axially distributed, the front wall of the valve body is provided with an oil inlet P, the oil duct is divided into a left oil duct and a right oil duct by taking the oil inlet P as a boundary point, three oil passing pipes are arranged in the oil duct corresponding to the oil inlet P, the rear wall of the valve body is provided with an oil outlet A in the left oil duct, and the rear wall of the valve body is provided with an oil outlet B in the right oil duct;
the control piston and the control piston end cover are correspondingly arranged in an oil duct at the rear side of the ultrahigh pressure one-way valve, and an ultrahigh pressure sealing plug is arranged between the ultrahigh pressure one-way valve and the control piston.
2. A superhigh pressure three-position three-way valve according to claim 1, characterized in that: the oil inlet P is connected with a high-pressure cavity of the cubic apparatus main engine, the oil outlet A is connected with a servo pressure relief valve, and the oil outlet B is connected with a low-pressure throttle valve.
3. A superhigh pressure three-position three-way valve according to claim 1, characterized in that: when the system is in a non-working position, the control oil path A, B, T of the three-position four-way electromagnetic directional valve is in a communicated state, the rodless cavities of the control pistons on the left side and the right side are guaranteed to unload, the ultrahigh pressure one-way valves on the left side and the right side are in a closed state under the action of high-pressure oil and top end spring force, and the oil inlet P is disconnected with the oil outlet A and the oil outlet B.
4. A superhigh pressure three-position three-way valve according to claim 1, characterized in that: when the system is in an ultrahigh pressure relief state, the electromagnet on the a side of the three-position four-way electromagnetic directional valve is electrified, oil is controlled to flow to the rodless cavity of the control piston on the left side to push the control piston to move, and the ultrahigh pressure one-way valve is jacked open;
ultrahigh-pressure hydraulic oil enters an oil outlet A through an oil pipe III and an ultrahigh-pressure one-way valve on the left side, and enters a servo pressure relief valve connected behind the oil outlet A through the oil outlet A to realize slow pressure relief;
correspondingly, the electromagnet on the side B of the three-position four-way electromagnetic reversing valve is free of electricity, oil is controlled to flow to the control piston rod cavity on the right side to be located at the right non-working position, the ultrahigh pressure one-way valve on the right side is guaranteed to be in a closed state, and the oil inlet P and the oil outlet B are disconnected.
5. A superhigh pressure three-position three-way valve according to claim 1, characterized in that: when the pressure is relieved to a low-pressure section, the electromagnet on the side a of the three-position four-way electromagnetic reversing valve is powered off, the electromagnet on the side b of the three-position four-way electromagnetic reversing valve is powered on, and control oil flows to the rodless cavity of the control piston on the right side to push the control piston to move so as to jack the ultrahigh-pressure one-way valve on the right side;
ultrahigh-pressure hydraulic oil enters an oil outlet B through an oil pipe III and an ultrahigh-pressure one-way valve on the right side, and enters a low-pressure throttle valve connected behind the oil outlet B, so that the low-pressure section is quickly relieved;
correspondingly, an electromagnet on the side a of the three-position four-way electromagnetic reversing valve is free of electricity, oil is controlled to flow to the control piston rod cavity on the right side to enable the control piston rod cavity to be located in the left non-working position, the left ultrahigh pressure one-way valve is guaranteed to be in a closed state, and the oil inlet P and the oil outlet A are disconnected.
6. A very high pressure three position three way valve according to any one of claims 1 to 5 wherein: the ultrahigh pressure sealing plug adopts a cone valve structure.
7. A uhp three-position, three-way valve according to claim 6 wherein: high-pressure seals are arranged among the control piston, the control piston end cover and the valve body; and an ultrahigh pressure combined seal is arranged between the ultrahigh pressure seal plug and the valve body.
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| CN202111561054.1A CN114412862B (en) | 2021-12-20 | 2021-12-20 | Ultrahigh-pressure three-position three-way valve |
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|---|---|---|---|---|
| EP0099751A1 (en) * | 1982-07-19 | 1984-02-01 | Rudolph Bührman | Hydraulic unloader valve |
| US6427721B1 (en) * | 1999-07-06 | 2002-08-06 | Sauer-Danfoss (Nordberg) A/S | Hydraulic valve arrangement with locking function |
| CN104061346A (en) * | 2014-06-13 | 2014-09-24 | 苏州华徕光电仪器有限公司 | Duplex type hydraulic control one-way valve |
| CN105402449A (en) * | 2015-12-25 | 2016-03-16 | 江苏恒立液压有限公司 | Hydraulically-controlled check valve |
| CN209511190U (en) * | 2018-12-27 | 2019-10-18 | 深圳市硕锐科技有限公司 | Solenoid valve |
| CN112628225A (en) * | 2020-11-03 | 2021-04-09 | 郑州磨料磨具磨削研究所有限公司 | Numerical control pressure relief valve group |
-
2021
- 2021-12-20 CN CN202111561054.1A patent/CN114412862B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0099751A1 (en) * | 1982-07-19 | 1984-02-01 | Rudolph Bührman | Hydraulic unloader valve |
| US6427721B1 (en) * | 1999-07-06 | 2002-08-06 | Sauer-Danfoss (Nordberg) A/S | Hydraulic valve arrangement with locking function |
| CN104061346A (en) * | 2014-06-13 | 2014-09-24 | 苏州华徕光电仪器有限公司 | Duplex type hydraulic control one-way valve |
| CN105402449A (en) * | 2015-12-25 | 2016-03-16 | 江苏恒立液压有限公司 | Hydraulically-controlled check valve |
| CN209511190U (en) * | 2018-12-27 | 2019-10-18 | 深圳市硕锐科技有限公司 | Solenoid valve |
| CN112628225A (en) * | 2020-11-03 | 2021-04-09 | 郑州磨料磨具磨削研究所有限公司 | Numerical control pressure relief valve group |
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| CN114412862B (en) | 2024-10-22 |
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