CN115614509A - Bidirectional electromagnetic pressure-maintaining unloading valve - Google Patents

Bidirectional electromagnetic pressure-maintaining unloading valve Download PDF

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Publication number
CN115614509A
CN115614509A CN202211255210.6A CN202211255210A CN115614509A CN 115614509 A CN115614509 A CN 115614509A CN 202211255210 A CN202211255210 A CN 202211255210A CN 115614509 A CN115614509 A CN 115614509A
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China
Prior art keywords
oil
oil inlet
valve
channel
passage
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CN202211255210.6A
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Chinese (zh)
Inventor
杨洪新
杨莉
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Changzhou Wenli Automation Co ltd
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Changzhou Wenli Automation Co ltd
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Priority to CN202211255210.6A priority Critical patent/CN115614509A/en
Publication of CN115614509A publication Critical patent/CN115614509A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/07Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/024Pressure relief valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00Check valves
    • F16K15/02Check valves with guided rigid valve members
    • F16K15/04Check valves with guided rigid valve members shaped as balls
    • F16K15/044Check valves with guided rigid valve members shaped as balls spring-loaded
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00Check valves
    • F16K15/18Check valves with actuating mechanism; Combined check valves and actuated valves
    • F16K15/184Combined check valves and actuated valves
    • F16K15/1843Combined check valves and actuated valves for ball check valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00Construction of housing; Use of materials therefor
    • F16K27/04Construction of housing; Use of materials therefor of sliding valves
    • F16K27/041Construction of housing; Use of materials therefor of sliding valves cylindrical slide valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/02Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0603Multiple-way valves
    • F16K31/061Sliding valves
    • F16K31/0613Sliding valves with cylindrical slides

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

The invention relates to a two-way electromagnetic pressure maintaining unloading valve, which comprises a three-position four-way electromagnetic reversing valve, a valve body and a valve cover, wherein the three-position four-way electromagnetic reversing valve is provided with an a-side electromagnet, a B-side electromagnet, an A channel, a B channel, a P channel and a T channel, and the two-way electromagnetic pressure maintaining unloading valve also comprises: the main valve body is provided with an A1 oil inlet/outlet passage cavity, a B1 oil inlet/outlet passage cavity, an A2 oil inlet/outlet passage cavity, a B2 oil inlet/outlet passage cavity, an oil inlet P and an oil return T; and the two hydraulic control one-way valves are respectively arranged between the A1 oil inlet/outlet passage cavity and the B1 oil inlet/outlet passage cavity and between the A2 oil inlet/outlet passage cavity and the B2 oil inlet/outlet passage cavity. The hydraulic system can be used for bypass unloading oil return in a hydraulic loop of a bidirectional high-pressure large-flow hydraulic system, and is matched with a large-flow Y function or H function slide valve type direction valve to perform zero-leakage bidirectional pressure maintaining and non-impact unloading oil return.

Description

Bidirectional electromagnetic pressure-maintaining unloading valve
Technical Field
The invention relates to the technical field of valves, in particular to a bidirectional electromagnetic pressure maintaining unloading valve.
Background
At present, the pressure maintaining unloading valve in the prior art is usually of a single-channel type, and the pressure is usually 31.5MPa. The unloading impact is large in high-pressure large-flow use occasions. In some high-pressure occasions, a corresponding valve cannot be selected, and only a manual ball valve operation is selected for replacement.
Because the prior art has lower pressure and large impact, the hydraulic system can not be used for model selection in a high-pressure high-flow system with the pressure of more than 40MPa, and particularly needs to be installed in a split manner in a bidirectional hydraulic loop, so that the whole hydraulic system has the defects of not compact structure, poor integration and inconvenient installation.
Therefore, a bidirectional electromagnetic pressure maintaining and unloading valve is needed to solve a series of problems of two channels, bidirectional pressure maintaining, no-impact unloading and oil return and the like in a hydraulic circuit of a hydraulic system in the situation of requiring high pressure and large flow.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a bidirectional electromagnetic pressure maintaining unloading valve.
In order to realize the purpose of the invention, the invention adopts the following technical scheme: the two-way electromagnetic pressure maintaining unloading valve comprises a three-position four-way electromagnetic reversing valve, an a-side electromagnet, a B-side electromagnet, an A channel, a B channel, a P channel and a T channel, and further comprises:
the main valve body is provided with an A1 oil inlet and outlet passage cavity and a B1 oil inlet and outlet passage cavity which are communicated with the A passage, an A2 oil inlet and outlet passage cavity and a B2 oil inlet and outlet passage cavity which are communicated with the B passage, an oil inlet P communicated with the P passage and an oil return T communicated with the T passage, wherein the oil inlet P is connected with a pressure oil source, and the oil return T is connected with an oil tank;
the two hydraulic control one-way valves are respectively arranged between the A1 oil inlet/outlet passage cavity and the B1 oil inlet/outlet passage cavity and between the A2 oil inlet/outlet passage cavity and the B2 oil inlet/outlet passage cavity;
the first path of channel is formed by the A1 oil inlet/outlet channel cavity and the B1 oil inlet/outlet channel cavity, and the second path of channel is formed by the A2 oil inlet/outlet channel cavity and the B2 oil inlet/outlet channel cavity;
when the three-position four-way electromagnetic directional valve is in the middle position, under the action of the two hydraulic control one-way valves, the liquid flow in the direction from the A1 oil inlet/outlet passage cavity to the B1 oil inlet/outlet passage cavity and in the direction from the A2 oil inlet/outlet passage cavity to the B2 oil inlet/outlet passage cavity is stopped;
when an electromagnet on the b side of the three-position four-way electromagnetic reversing valve is electrified, the pressure oil source is switched to the channel A, so that the hydraulic control one-way valve on the a side acts to realize the bidirectional through flow of the first channel, and the two-way through flow is in an unloading function opening state of the first channel;
when the electromagnet on the side a of the three-position four-way electromagnetic reversing valve is electrified, the pressure oil source is switched to the channel B, so that the hydraulic control one-way valve on the side B acts to realize the bidirectional through flow of the second channel, and the second channel is in an unloading function opening state.
Furthermore, each hydraulic control one-way valve is a spiral type plug-in hydraulic control one-way valve and is symmetrically arranged on two sides of the main valve body.
The hydraulic control one-way valve is different from a common one-way valve in that one more control oil way is arranged, when the control oil way is not communicated with pressure oil, the hydraulic control one-way valve works like the common one-way valve, and the pressure oil only flows to an oil outlet from an oil inlet and cannot flow reversely. When control pressure is input into the control oil path, the piston mandril moves rightwards under the action of pressure oil, and the one-way valve is jacked open by the mandril, so that the oil inlet and the oil outlet are communicated. If the oil outlet is larger than the oil inlet, the oil can flow reversely. The spiral type plug-in hydraulic control one-way valve can be more conveniently installed in the main valve body, and is simple in structure and easier to disassemble, assemble and maintain.
Furthermore, a flange plug and a sealing ring are arranged outside each hydraulic control one-way valve, and each hydraulic control one-way valve is sealed in the main valve body through the flange plug and the sealing ring.
Furthermore, the main valve core of each hydraulic control one-way valve is a ball valve core with pre-unloading.
Furthermore, the main valve body is internally provided with an O-shaped ring and a corresponding step, and the close contact between the step and the shoulder of the mounting bottom hole of the main valve body realizes the sealing between the oil inlet and outlet ports A1 and B1 and the sealing between the oil inlet and outlet ports A2 and B2, so that an oil inlet and outlet cavity A1, an oil inlet and outlet cavity B1, an oil inlet and outlet cavity A2 and an oil inlet and outlet cavity B2 are formed. Namely, the first channel and the second channel respectively and simply screw the two spiral plug-in type hydraulic control one-way valve components into the main valve body mounting screw hole (the step of the valve body is provided with an O-shaped sealing ring, and the sealing between the oil inlet and outlet channels is realized through the close contact between the step of the valve body and the shoulder of the main valve body mounting bottom hole).
Furthermore, a plurality of oil channel processes Kong Luodu are arranged on the main valve body, and the control oil channels on the first channel and the second channel are blocked and separated from the outside through an oil channel process Kong Luodu.
Furthermore, a plurality of mounting screw holes are formed in the main valve body. The main valve body can be conveniently installed on other parts.
Further, the pre-unloading control ratio of each hydraulic control one-way valve is 10-26.
Furthermore, the main material of the main valve body is 42CrMo, and the design pressure is 500bar. The test pressure is not less than 630bar.
The cover plate is used for replacing the three-position four-way electromagnetic reversing valve, an A port control oil passage threaded interface and a B port control oil passage threaded interface are arranged on the cover plate and are respectively and correspondingly connected with the control oil passages of the first channel and the second channel, and the A port control oil passage threaded interface and the B port control oil passage threaded interface are respectively used for connecting a pressure oil source to the hydraulic control one-way valve damping hole to the main valve core piston channel.
According to the arrangement, the three-position four-way electromagnetic reversing valve can be detached according to the requirements of the use working condition, then the cover plate is arranged on the main valve body, and the port A control oil passage and the port B control oil passage are respectively connected with the variable pressure oil source, so that the remote control is realized.
The working principle and the beneficial effects are as follows: 1. compared with the prior art, the bidirectional electromagnetic pressure maintaining unloading valve can realize bidirectional pressure maintaining, high-pressure impact-free unloading, bypass unloading and low-pressure control high pressure under the bidirectional high-pressure large-flow scene. The control oil path (the oil path in the three-position four-way electromagnetic directional valve) and the main oil path (the first path channel and the second path channel) are formed by two oil paths which are not interfered with each other, the valve core has a large control pressure ratio, and then an energy accumulator or a low-pressure small-flow hydraulic pump can be used as an external pressure oil source, so that unloading and oil return of the main oil path under the pressure maintaining state of the main oil path A1 or A2 can be realized. Under the working condition, energy can be saved, and the production cost can be reduced;
2. compared with the prior art, when the three-position four-way electromagnetic directional valve is in the middle position, under the action of the two hydraulic control one-way valves, after the liquid flow in the direction from the A1 oil inlet/outlet passage cavity to the B1 oil inlet/outlet passage cavity and in the direction from the A2 oil inlet/outlet passage cavity to the B2 oil inlet/outlet passage cavity is stopped, the A1 oil inlet/outlet passage cavity and the A2 oil inlet/outlet passage cavity are pressurized to realize leak-free pressure maintaining, and then the pressure maintaining effect is realized;
3. compared with the prior art, when an external pressure oil source passes through an oil inlet P, and an oil return port T is connected to a side B electromagnet of a rear three-position four-way electromagnetic directional valve and is electrified, the electromagnetic valve can be switched to the passage P → A and the passage B → T, pressure oil pushes a side a hydraulic control one-way valve to act through a control oil duct A, so that the hydraulic control one-way valve has a pre-unloading function in the pressurizing or pressure maintaining state of an A1 oil inlet and outlet channel cavity, and the oil can be returned to an oil tank without impact unloading from the A1 oil inlet and outlet channel cavity to the B1 oil inlet and outlet channel cavity; when an electromagnet on the a side of the three-position four-way electromagnetic reversing valve is electrified, the electromagnetic reversing valve can be switched to a P → B way and an A → T way, pressure oil pushes a hydraulic control one-way valve on the B side to act through a control oil duct B, and then the hydraulic control one-way valve has a pre-unloading function in the pressurizing or pressure maintaining state of an A2 oil inlet and outlet channel cavity, so that the oil can be returned to an oil tank without impact unloading from the A2 oil inlet and outlet channel cavity to the B2 oil inlet and outlet channel cavity; the function is switched by the three-position four-way electromagnetic valve, and then the function is converted, so that the two-way unloading oil return function is realized.
Compared with the prior art, because the screw-type plug-in hydraulic control one-way valve is adopted as the component, the hydraulic control one-way valve has the advantages of compact structure, good sealing performance, easy installation and maintenance and zero high-pressure leakage, and the integral structure of the hydraulic control one-way valve is combined, so that the degree of compact structure can be further improved, and split installation is not needed in a hydraulic system, thereby solving the problems that the structure is not compact, the integration is poor, the installation and the use are inconvenient, and the requirements of certain high-pressure high-flow two-way external control type systems cannot be met.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an oil circuit diagram of FIG. 1;
FIG. 3 is a three-view illustration of FIG. 1;
FIG. 4 is a schematic structural diagram of another embodiment of the present invention;
FIG. 5 is the oil circuit diagram of FIG. 4;
FIG. 6 is a three-view illustration of FIG. 4;
fig. 7 is a partially enlarged view of fig. 1.
In the figure, 1, a three-position four-way electromagnetic directional valve; 2. controlling an oil port B oil duct process Kong Luodu; 4. a first flange plug; 5. a first orifice; 6. a main valve body; 7. a first screw cylinder; 8. a first piston; 9. a first return spring; 10. a first main push rod; 11. a first O-ring; 12. b2, an oil inlet and outlet passage cavity; 13. a first pre-unloading thimble; 14. a second O-ring; 15. a first main spool; 16. first pre-unloading steel balls; 17. a first spring seat; 18. a first pagoda spring; 19. a first spring seat nut; 20. a2, an oil inlet and outlet passage cavity; 21. an oil return port T; 22. an oil inlet P; 23. a control oil duct A oil duct process Kong Luodu; 25. a second flange plug; 26. a second orifice; 27. a second screw cylinder; 28. a second piston; 29. a second return spring; 30. a second main push rod; 31. a third O-ring; 32. b1, an oil inlet and outlet passage cavity; 33. a second pre-unloading thimble; 34. a fourth O-ring; 35. a second main spool; 36. a second pre-discharge steel ball; 37. a second spring seat; 38. a second pagoda spring; 39. a second spring seat nut; 40. a1, an oil inlet and outlet passage cavity; 41. a first valve seat; 42. a second valve seat; 43. a side electromagnet; 44. b side electromagnet; 45. mounting a screw hole; 46. a cover plate; 47. the port A controls the oil duct; 48. and the port B controls the oil duct.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived from the embodiments of the present invention by a person skilled in the art, are within the scope of the present invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, the above terms should not be construed as limiting the present invention.
As shown in fig. 1 to 3 and fig. 7, the bidirectional electromagnetic pressure maintaining unloading valve includes:
the three-position four-way electromagnetic directional valve 1 is provided with an a-side electromagnet 43, a B-side electromagnet 44, an A channel, a B channel, a P channel and a T channel;
in this embodiment, the three-position four-way electromagnetic directional valve 1 is a product in the prior art, can be directly purchased from the market, is a conversion element between a hydraulic control system and an electrical appliance control system, realizes the movement of a valve core by utilizing the suction force of electromagnets at two ends, and changes the on-off of an oil path, thereby realizing the reversing of an execution element. And "three-position four-way" can be understood as: "three-position" refers to a valve core, and the valve core can realize the conversion of three positions. The four-way valve can realize different modes of communication among four oil ports in terms of functions. For example, in this example, the three-position four-way electromagnetic directional valve 1 with a "Y" functional valve element is used. The valve core can realize the conversion of the left position, the middle position and the right position. When the valve core is in the middle position, the P oil port channels are not communicated, and the channel A, the channel B and the channel T are communicated. When the valve core is in the left position, the oil path can enter the channel A from the channel P and then exit from the channel A, and the channel B is communicated with the channel T. When the valve core is at right position, the oil path can be led in from channel P to channel B and led out from channel A to channel T.
Therefore, the internal structure and the principle of the three-position four-way electromagnetic reversing valve are also the prior art, the description of the internal structure and the principle is omitted, and the functions and the characteristics of the three-position four-way electromagnetic reversing valve are utilized, namely the direction is switched through the three-position four-way electromagnetic reversing valve 1 through an external pressure oil source. And choose this product to have the mature of technology, low cost's advantage in case damage can directly follow main valve body 6 and pull down the change, and the maintenance cost is low, simple structure.
The main valve body 6 is provided with an A1 oil inlet and outlet passage cavity 40 and a B1 oil inlet and outlet passage cavity 32 which are communicated with the A passage, an A2 oil inlet and outlet passage cavity 20 and a B2 oil inlet and outlet passage cavity 12 which are communicated with the B passage, an oil inlet P22 communicated with the P passage and an oil return T21 communicated with the T passage, the oil inlet P22 is connected with a pressure oil source, and the oil return T21 is connected with an oil tank;
in this embodiment, an oil passage matched with four passages of the three-position four-way electromagnetic directional valve 1 and a cavity for installing a pilot operated check valve assembly are arranged in the main valve body 6.
Preferably, the main valve body 6 is made of high-strength alloy steel 42CrMo, and is subjected to heat treatment process and finish machining. The design pressure is 500bar, the high-pressure high-strength test of 630bar can be resisted, and the safety is high.
The two hydraulic control one-way valves are respectively arranged between the A1 oil inlet/outlet passage cavity 40 and the B1 oil inlet/outlet passage cavity 32 and between the A2 oil inlet/outlet passage cavity 20 and the B2 oil inlet/outlet passage cavity 12;
in this embodiment, the two-way hydraulic control check valve may be made of the existing product of hawei germany or other manufacturers, and is not limited herein, and the spiral cartridge hydraulic control check valve with the pre-unloading function is used as the valve core of the main valve body 6. The valve core has the advantages of high design pressure, mature technology, simple installation, convenient maintenance, compact structure, good sealing performance and high integration. The service performance and reliability of the invention are ensured.
The hydraulic control one-way valve is different from a common one-way valve in that a control oil way is added, when the control oil way is not communicated with pressure oil, the hydraulic control one-way valve works like the common one-way valve, and the pressure oil only flows from an oil inlet to an oil outlet and cannot reversely flow. When the control pressure is input into the control oil path, the piston ejector rod moves under the action of the pressure oil, and the one-way valve is ejected by the ejector rod to connect the oil inlet and the oil outlet. If the oil outlet is larger than the oil inlet, the oil can flow reversely. The spiral insertion type hydraulic control one-way valve can be more conveniently installed in the main valve body 6, and is simple in structure and convenient to disassemble and assemble.
The pre-unloading valve core is a ball type small one-way valve arranged in the main valve core (the valve port end is spherical), and the valve seat is arranged on the inner cavity of the main valve core. Before the main valve opening is opened, the small ball one-way valve is opened in advance, and the formed annular gap plays a throttling role, so that non-impact (pre) unloading is realized.
Specifically, each spiral inserted hydraulic control check valve comprises a damping hole, a spiral cylinder, a piston, a return spring, a main push rod, an O-shaped ring, a pre-unloading thimble, a main valve core, a pre-unloading steel ball, a spring seat, a pagoda spring, a spring seat nut and the like.
If the hydraulic control one-way valve positioned on the side b comprises a first damping hole 5, a first spiral cylinder 7, a first piston 8, a first return spring 9, a first main push rod 10, a first O-shaped ring 11, a first pre-unloading ejector pin 13, a second O-shaped ring 14, a first main valve core 15, a first pre-unloading steel ball 16, a first spring seat 17, a first pagoda spring 18, a first spring seat nut 19 and the like.
For example, the hydraulic control one-way valve on the side a comprises a second damping hole 26, a second spiral cylinder 27, a second piston 28, a second return spring 29, a second main push rod 30, a third O-ring 31, a second pre-unloading thimble 33, a fourth O-ring 34, a second main valve core 35, a second pre-unloading steel ball, a second spring seat 37, a second pagoda spring 38, a second spring seat nut 39 and the like.
The A1 oil inlet/outlet passage cavity 40 and the B1 oil inlet/outlet passage cavity 32 form a first passage, and the A2 oil inlet/outlet passage cavity 20 and the B2 oil inlet/outlet passage cavity 12 form a second passage; namely, the two hydraulic control one-way valves independently control the two channels.
Specifically, each pilot-controlled check valve is provided with a flange plug (a first flange plug 4 and a second flange plug 25) outside, and each pilot-controlled check valve is sealed in the main valve body 6 through the flange plugs. And an O-shaped ring and a valve seat are arranged outside the middle position of each hydraulic control one-way valve, so that the first channel and the second channel can be isolated through the O-shaped ring, the valve seat and the main valve body 6 respectively. The valve seat is used for installing a hydraulic control one-way valve, and the O-rings (the second O-ring 14 and the fourth O-ring 34) are arranged on the valve seat (the first valve seat 41 and the second valve seat 42). Just because this application has chooseed the spiral cartridge pilot operated check valve for use, consequently only need two simple and convenient screws of cartridge subassembly to be in main valve body 6 mounting screw hole. The steps of the main valve body 6 are provided with a second O-ring 14 and a fourth O-ring 34, and the sealing between the oil inlet and outlet ports A1 and B1 and the sealing between the oil inlet and outlet ports A2 and B2 are realized through the close contact between the valve body steps and the shoulder of the mounting bottom hole of the main valve body 6. Thereby forming an oil inlet and outlet cavity A1 and an oil inlet and outlet cavity B1, an oil inlet and outlet cavity A2 and an oil inlet and outlet cavity B2. Two channels, namely: first channels A1 and B1 channels, and second channels A2 and B2 channels.
Namely, A1-B1 is a first channel, and A2-B2 is a second channel. The first channel is isolated by the fourth O-shaped ring 34, the first valve seat 41 and the main valve body 6; the second path is isolated by the second O-ring 14, the second valve seat 42, the main valve body 6. Thereby forming A1 cavity and a B1 cavity and A2 and B2 cavities.
Preferably, a plurality of oil duct processes Kong Luodu (a control oil port B oil duct process hole plug 2 and a control oil duct a oil duct process hole plug 23) are arranged on the main valve body 6, and oil duct process holes in the first path of channel and the second path of channel are plugged through an oil duct process Kong Luodu.
As shown in fig. 1 in conjunction with the schematic diagram of fig. 2, when the three-position four-way electromagnetic directional valve 1 is in the neutral position (when the a-side electromagnet 43 and the B-side electromagnet 44 are not charged), under the action of the first pagoda spring 18 and the second pagoda spring 38, the liquid flow in the direction from the A1 oil inlet/outlet passage cavity 40 to the B1 oil inlet/outlet passage cavity 32 (A1 → B1) and in the direction from the A2 oil inlet/outlet passage cavity 20 to the B2 oil inlet/outlet passage cavity 12 (A2 → B2) is stopped according to the characteristics of the pilot operated check valve; under the state, the cavities A1 and A2 can be pressurized without leakage, thereby playing the role of pressure maintaining.
When the electromagnet 44 on the B side of the three-position four-way electromagnetic directional valve 1 is electrified (left position), P → A is through, B → T is through, and the pressure oil source is switched to the channel A, so that the hydraulic control one-way valve on the a side acts to realize the two-way through flow of the first channel, and the two-way through flow is in the unloading function opening state of the first channel; namely, the direction of a pressure oil source (an oil inlet P22) is switched to the cavity A, the pressure oil source enters the second damping hole 26 through the side a control oil path, the second piston 28, the second main push rod 30 and the second pre-unloading ejector pin 33 are pushed, the second pre-discharge steel ball 36 is opened, and then the second main valve core 35 is opened, so that the through flow of A1 → B1 and the through flow of B1 → A1 are realized. The state is the first channel unloading function opening state. At this time, in the state that the cavity A1 is pressurized or pressure maintaining, the cavity A1 can return oil to the oil tank without impact unloading because the second main valve element 35 has a pre-unloading function.
When the electromagnet 43 on the a side of the three-position four-way electromagnetic directional valve 1 is electrified (right position), the pressure oil source is switched to the channel B, so that the hydraulic control one-way valve on the B side acts to realize the two-way through flow of the second channel, and the unloading function of the second channel is in an opening state. Namely, the pressure oil source direction (oil inlet port P22) is towards the cavity B, and the pressure oil source direction (oil inlet port P22) passes through the side B control oil path and enters the first damping hole 5, so that the first piston 8, the first main push rod 10 and the first pre-unloading ejector pin 13 are pushed, the first pre-unloading steel ball 16 is opened, then the first main valve core 15 is opened, and the through flow of A2 → B2 and the through flow of B2 → A2 are realized. And is in the second channel unloading function opening state. At this time, under the state that the A2 cavity is pressurized or pressure maintaining, the A2 cavity can return oil to the oil tank without impact unloading because the first main valve core 15 has the pre-unloading function.
Therefore, the valve body can realize multiple functions of bidirectional pressure maintaining and no-impact unloading after the pressure oil source is switched by the three-position four-way electromagnetic directional valve 1.
Referring to fig. 4-6, in other embodiments, the three-position four-way solenoid valve may be removed according to the requirement of the operating condition, the mounting cover plate 46 is connected to the screw hole 47 corresponding to the port a control oil passage and the screw hole 48 corresponding to the port B control oil passage through external pipelines, the on/off of the pressure oil source may be controlled to realize remote control (equal to that the solenoid valve is mounted elsewhere, and the port A, B is connected by a hose), and the two ends may also be controlled to open the valve core at the same time for unloading.
The three-position four-way electromagnetic directional valve further comprises a cover plate 46, wherein the cover plate 46 is used for replacing the three-position four-way electromagnetic directional valve 1 (the installation sizes are consistent), an A port control oil passage screw hole 47 and a B port control oil passage screw hole 48 are arranged on the cover plate 46, and a P port and a T port are plugged. The screw hole 47 and the screw hole 48 are respectively used for connecting the corresponding first channel and second channel external control pipelines. That is, when the port a control oil passage 47 is connected to the pressure oil source, the second piston 28, the second main push rod 30 and the second pre-unloading thimble 33 are pushed to the second damping hole 26 through the cavity a oil passage to open the second main spool 35 after the second pre-unloading steel ball 36 is pushed open. A1 → B1 through flow B1 → A1 through flow. At the moment, the cavity A1 can return oil to the oil tank without impact unloading because the main valve core has a pre-unloading function in a pressurizing or pressure maintaining state.
When the port B control oil duct 48 is connected to a pressure oil source, the port B control oil duct passes through a cavity B oil duct to reach the first damping hole 5, the first piston 8, the first main push rod 10 and the first pre-unloading ejector pin 13 are pushed open, and then the first main valve core 15 is opened. A2 → B2 flow B2 → A2 flow. At the moment, the A2 cavity can return oil to the oil tank without impact unloading because the main valve core has the pre-unloading function in the pressurizing or pressure maintaining state.
The present invention is not described in detail in the prior art, and therefore, the present invention is not described in detail.
It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.
Although the three-position four-way electromagnetic directional valve 1, the control oil port B oil duct process hole plug 2, the first flange plug 4, the first damping hole 5, the main valve body 6, the first spiral cylinder 7, the first piston 8, the first return spring 9, the first main push rod 10, the first O-ring 11, the B2 oil inlet/outlet port channel cavity 12, the first pre-unloading thimble 13, the second O-ring 14, the first main valve core 15, the first pre-unloading steel ball 16, the first spring seat 17, the first pagoda spring 18, the first spring seat nut 19, the A2 oil inlet/outlet port channel cavity 20, the oil return port T21, the oil inlet port P22, the control oil duct A oil duct process Kong Luodu, 23 the terms of a second flange plug 25, a second damping hole 26, a second spiral cylinder 27, a second piston 28, a second return spring 29, a second main push rod 30, a third O-ring 31, a B1 oil inlet and outlet channel cavity 32, a second pre-unloading thimble 33, a fourth O-ring 34, a second main valve core 35, a second pre-discharging steel ball 36, a second spring seat 37, a second pagoda spring 38, a second spring seat nut 39, an A1 oil inlet and outlet channel cavity 40, a first valve seat 41, a second valve seat 42, an a-side electromagnet 43, a B-side electromagnet 44, a mounting screw hole 45, a cover plate 46, an A-port control oil duct 47, a B-port control oil duct 48 and the like, but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone in the light of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present application, fall within the protection scope of the present invention.

Claims (10)

1. Two-way electromagnetism pressurize unloading valve, including three-position four-way electromagnetic directional valve, be equipped with a side electro-magnet, B side electro-magnet, A passageway, B passageway, P passageway and T passageway, its characterized in that still includes:
the main valve body is provided with an A1 oil inlet and outlet passage cavity and a B1 oil inlet and outlet passage cavity which are communicated with the A passage, an A2 oil inlet and outlet passage cavity and a B2 oil inlet and outlet passage cavity which are communicated with the B passage, an oil inlet P communicated with the P passage and an oil return T communicated with the T passage, wherein the oil inlet P is connected with a pressure oil source, and the oil return T is connected with an oil tank;
the two hydraulic control one-way valves are respectively arranged between the A1 oil inlet/outlet passage cavity and the B1 oil inlet/outlet passage cavity and between the A2 oil inlet/outlet passage cavity and the B2 oil inlet/outlet passage cavity;
the first path of channel is formed by the A1 oil inlet/outlet channel cavity and the B1 oil inlet/outlet channel cavity, and the second path of channel is formed by the A2 oil inlet/outlet channel cavity and the B2 oil inlet/outlet channel cavity;
when the three-position four-way electromagnetic directional valve is in the middle position, under the action of the two hydraulic control one-way valves, the liquid flow in the direction from the A1 oil inlet/outlet port passage cavity to the B1 oil inlet/outlet port passage cavity and in the direction from the A2 oil inlet/outlet port passage cavity to the B2 oil inlet/outlet port passage cavity is stopped;
when an electromagnet on the b side of the three-position four-way electromagnetic reversing valve is electrified, the pressure oil source is switched to the channel A, so that the hydraulic control one-way valve on the a side acts to realize the bidirectional through flow of the first channel, and the state is the unloading function opening state of the first channel;
when the electromagnet on the side a of the three-position four-way electromagnetic reversing valve is electrified, the pressure oil source is switched to the channel B, so that the hydraulic control one-way valve on the side B acts to realize the bidirectional through flow of the second channel, and the state is the unloading function opening state of the second channel.
2. The bi-directional electromagnetic pressure maintaining unloading valve of claim 1, wherein each pilot operated check valve is a screw-type plug-in pilot operated check valve and is symmetrically arranged on both sides of the main valve body.
3. The bi-directional electromagnetic pressure maintaining unloading valve of claim 2, wherein each hydraulic control one-way valve is externally provided with a flange plug, and each hydraulic control one-way valve is sealed in the main valve body installation hole by the flange plug and is isolated from the outside.
4. The two-way electromagnetic pressure maintaining unloading valve of claim 2, wherein the main valve core of each hydraulic control one-way valve is a valve core with a pre-unloading ball valve.
5. The bi-directional electromagnetic pressure maintaining unloading valve according to claim 1, wherein an O-ring and a corresponding step are provided in the main valve body, and the step is in close contact with a shoulder of the mounting bottom hole of the main valve body to seal the oil inlet/outlet ports A1 and B1 and the oil inlet/outlet ports A2 and B2, so as to form an oil inlet/outlet port A1 and an oil inlet/outlet port B1 and an oil inlet/outlet port A2 and an oil inlet/outlet port B2.
6. The bidirectional electromagnetic pressure-maintaining unloading valve according to claim 1, wherein a plurality of oil passages Kong Luodu are provided on the main valve body, and the first passage control oil passage and the second passage control oil passage are blocked and separated from the outside by the oil passage process Kong Luodu.
7. The bi-directional electromagnetic pressure maintaining and unloading valve of claim 1, wherein the main valve body is provided with a plurality of mounting screw holes.
8. The bi-directional electromagnetic pressure maintaining and unloading valve according to any one of claims 1-7, wherein the pre-unloading ratio of each pilot-controlled check valve is 10-26.
9. The bi-directional electromagnetic pressure-maintaining unloading valve according to any one of claims 1 to 7, characterized in that the material of the main valve body is 42CrMo.
10. The two-way electromagnetic pressure maintaining unloading valve according to any one of claims 1-7, further comprising a cover plate for replacing the three-position four-way electromagnetic directional valve, and the cover plate is provided with an a port control oil passage threaded interface and a B port control oil passage threaded interface, which are respectively and correspondingly connected with the control oil passages of the first channel and the second channel, and the a port control oil passage threaded interface and the B port control oil passage threaded interface are respectively connected to a pressure oil source, a hydraulic control one-way valve damping hole and a main valve core piston channel.
CN202211255210.6A 2022-10-13 2022-10-13 Bidirectional electromagnetic pressure-maintaining unloading valve Pending CN115614509A (en)

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Application Number Priority Date Filing Date Title
CN202211255210.6A CN115614509A (en) 2022-10-13 2022-10-13 Bidirectional electromagnetic pressure-maintaining unloading valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211255210.6A CN115614509A (en) 2022-10-13 2022-10-13 Bidirectional electromagnetic pressure-maintaining unloading valve

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CN115614509A true CN115614509A (en) 2023-01-17

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024156282A1 (en) * 2023-01-28 2024-08-02 中国核电工程有限公司 Valve set for safety of nuclear power plant, pressure relief valve set, discharge valve set, and isolation valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024156282A1 (en) * 2023-01-28 2024-08-02 中国核电工程有限公司 Valve set for safety of nuclear power plant, pressure relief valve set, discharge valve set, and isolation valve

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