CN112762042A - Slide valve type hydraulic reversing valve with special sealing valve core structure - Google Patents
Slide valve type hydraulic reversing valve with special sealing valve core structure Download PDFInfo
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- CN112762042A CN112762042A CN202110103342.6A CN202110103342A CN112762042A CN 112762042 A CN112762042 A CN 112762042A CN 202110103342 A CN202110103342 A CN 202110103342A CN 112762042 A CN112762042 A CN 112762042A
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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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Abstract
The invention discloses a slide valve type hydraulic reversing valve with a special sealing valve core structure, which effectively ensures the sealing performance of the slide valve type hydraulic reversing valve through the sealing structure of a valve core valve hole under emulsion, water and other water-based transmission media, improves the working reliability of the slide valve type hydraulic reversing valve and enlarges the application range of the slide valve type hydraulic reversing valve.
Description
Technical Field
The invention belongs to the field of control valves, and relates to a slide valve type hydraulic reversing valve with a special sealing valve core structure.
Background
The working medium is an extremely important component of the hydraulic system, and whether the hydraulic system can reliably, effectively, safely and economically operate is closely related to the performance of the selected working medium. In the hydrostatic fluid system, the working medium is mainly divided into mineral oil and fire-retardant liquid. The mineral oil type working media have many advantages, the main disadvantage of which is flammability. The use of mineral oil-type hydraulic oil can be dangerous in the vicinity of open fire, high temperature heat sources, or other places where fires are likely to occur. Therefore, the mineral oil type hydraulic oil is not allowed to be used as a hydraulic system working medium near a high-temperature open fire or in a coal mine, and a fire-retardant liquid is required to be used instead, for example, the fire-retardant liquid is used as the hydraulic system working medium in the coal mine, and the working medium of a hydraulic support and an external injection type monomer hydraulic support is emulsion or pure water.
The reversing valve is a conventional hydraulic component and is commonly applied to hydraulic systems under various conditions, and the most widely applied reversing valve is a slide valve type reversing valve. However, for the slide valve type reversing valve, because it uses the slide valve core to make relative motion work relative to the valve body hole, there is a matching gap between the valve core and the valve body hole inevitably, the seal of the reversing valve belongs to the annular gap seal, the flow state of the annular gap between the slide valve core and the valve body hole is generally laminar flow, the higher the working pressure is, the larger the internal leakage is, and the too large leakage of the reversing valve will cause the serious heating of the hydraulic system, the efficiency is reduced, and the motion speed of the actuating element is affected. Because the viscosity of the emulsified water-based flame-retardant liquid, water and other water-based flame-retardant media is low and meets the requirements, the slide valve type reversing valve generally adopts mineral oil type hydraulic oil as a working medium.
As the emulsion, water and other water-based flame-retardant media are not suitable for the current slide valve type reversing valve, the reversing valve of the underground hydraulic support of the coal mine adopts a cone valve or ball valve mode. The cone valve type reversing valve realizes reversing through opening or closing of the cone valve core relative to the valve seat, has good sealing performance, but a single cone valve can only realize a two-position three-way function, so if a more complex function is obtained, a plurality of valves are required to be combined.
The reversing valve used by the existing hydraulic support is of a plate type structure, each plate valve consists of an operating mechanism, two sets of valve cores and a valve body, wherein each set of valve core forms a two-position three-way reversing valve, and the sealing form of the valve is cone valve sealing. Two valve cores (two-position three-way valves) form a three-position four-way reversing valve, so that the reversing valve actually plays the role of the three-position four-way reversing valve. This design is complicated and increases the cost of machining and maintenance of the equipment. If a slide valve type three-position four-way valve is used, the structure is simple and reliable. Therefore, in the actual working environment under the coal mine, the design of a reversing valve structure which can reliably seal and avoid leakage and can complete reversing operation through a simple structure is urgently needed.
Similarly, similar problems exist in hydraulic systems where the hydraulic directional valve is water and other water-based media.
Disclosure of Invention
In order to solve the problems, the invention provides the slide valve type hydraulic reversing valve with the special sealing valve core structure, which is simple in structure, can be used under emulsion, water and other water-based transmission media, can effectively ensure the sealing performance of the hydraulic reversing valve, improves the working reliability of the hydraulic reversing valve, and improves the working efficiency.
The technical scheme of the invention is as follows:
a slide valve type hydraulic reversing valve with a special sealing valve core structure comprises a reversing valve body, a return spring, a linear rolling bearing, a slide valve core and a sealing ring; the reversing valve body is internally provided with a valve hole matched with a slide valve core and a multi-path pore channel communicated with a liquid inlet and outlet channel, the slide valve core is in coaxial clearance fit with the valve hole, and two ends of the slide valve core are respectively sleeved with a reset spring coaxial with the slide valve core;
specifically, a macromolecule sealing ring of the slide valve type hydraulic reversing valve is arranged on a valve core, a sealing groove is formed in a position, close to a left annular diversion groove, of a left cylinder of the slide valve core, a sealing groove is also formed in a position, close to a right annular diversion groove, of a right cylinder of the slide valve core, sealing grooves are formed in two sides of a middle cylinder of the slide valve core, and sealing rings are assembled in the sealing grooves;
specifically, a valve hole in the valve body of the slide valve type hydraulic reversing valve is vertically communicated with the multi-channel pore passage, an annular concave table coaxial with the valve hole is arranged at the communication position, and a shoulder of the concave table and a transition chamfer of the valve hole are linear, arc-shaped and a combination of the linear and arc-shaped, so that the instant impact or shearing of a shoulder edge angle on a sealing ring is relieved when a slide valve core moves and enters and exits a sealing area;
specifically, a polymer sealing ring of the slide valve type hydraulic reversing valve is arranged in a valve body, a valve hole in the reversing valve body is vertically communicated with the multi-channel hole, an annular concave table coaxial with the valve hole is arranged at the communication position, sealing grooves are arranged on two sides of the left annular concave table of the valve body, sealing grooves are also arranged on two sides of the right annular concave table of the valve body, sealing grooves are arranged on two sides of the middle annular concave table of the valve body, and sealing rings are assembled in the sealing grooves;
specifically, a chamfer structure is arranged at the positions of a plurality of annular diversion grooves on a spool cylinder of the slide valve type hydraulic reversing valve, chamfers of end faces of cylinders at two sides of the annular diversion grooves are linear, arc and combination of linear and arc, and the chamfer structure is used for slowing down instantaneous impact or shearing of edges and corners of the spool cylinder on a sealing ring when a slide valve spool moves and enters and exits a sealing area;
specifically, the sealing structure adopted between the valve core and the valve body of the slide valve type hydraulic reversing valve is that a sealing ring is arranged on the valve core, a transition chamfer is arranged on the valve body, or the sealing ring is arranged in the valve body, and a chamfer is arranged on the valve core.
Specifically, the valve body, the spool valve core and the return spring of the slide valve type hydraulic reversing valve are made of materials which are difficult to rust, such as copper and stainless steel, or are of structures with inner and outer surfaces plated with anti-oxidation layers;
specifically, working media of the slide valve type hydraulic reversing valve are emulsion, water and other water-based transmission media;
specifically, the slide valve type hydraulic reversing valve is a hydraulic system of a water-based medium or a hydraulic reversing valve for a hydraulic support in a coal mine;
the technical effect brought by the technical scheme of the invention is as follows:
the common slide valve type reversing valve has no sealing ring, and a gap seal is formed between the valve body and the valve core. The hydraulic support has higher working pressure and large working medium leakage. The slide valve type reversing valve is provided with the sealing ring, working media are emulsion, water and other water-based flame-retardant media, and leakage cannot occur.
A chamfer structure on the valve body or the valve core is subjected to finite element analysis to design a specific shape, the shape can be a linear type, an arc line type, a combination of the linear type and the arc line type, and a sealing ring with a specific shape is matched, so that when the sealing ring enters a valve hole and leaves the valve hole during reversing, the sealing ring cannot be strongly extruded, the reversing valve is stably reversed, and the service life is prolonged.
The sealing ring made of high polymer materials is wear-resistant, corrosion-resistant, self-lubricating and reliable in work.
And linear rolling bearings are arranged at two ends of the valve core. Due to poor lubricating property of the emulsion, water and other water-based flame-retardant media, after the linear rolling bearing is installed, the steel balls of the rolling bodies in the linear rolling bearing are in point contact with the valve core, so that high-precision and light linear motion can be realized under the condition of minimum friction resistance, the abrasion of the reversing valve is reduced, and the service life of the reversing valve is prolonged.
The common slide valve type reversing valve usually has a hydraulic clamping phenomenon, so that the valve core and the valve body are required to have higher coaxiality. The reversing valve of the design is provided with the linear rolling bearing, so that the hydraulic clamping phenomenon is relieved.
It should be noted that the reversing valve described in this specification is designed for all the reversing valves of the slide valve function, including but not limited to a three-position four-way valve, and specifically may be a two-position two-way valve, a two-position three-way valve, a two-position four-way valve, a two-position five-way valve, a three-position four-way valve, a three-position five-way valve, and the like.
Drawings
FIG. 1 is a schematic view of a forward cross section of a slide valve type hydraulic directional control valve with a special sealing valve core structure (sealing ring is arranged on the valve core)
FIG. 2 is a schematic sectional top view of a slide valve type hydraulic directional control valve with a special sealing valve core structure (sealing ring is arranged on the valve core)
FIG. 3 is a partial schematic view of the valve hole shoulder of a slide valve type hydraulic directional control valve with a special sealing valve core structure (the sealing ring is arranged on the valve core)
FIG. 4 is a schematic view of a forward cross section of a slide valve type hydraulic directional control valve with a special sealing valve core structure (sealing ring is installed in the valve body)
FIG. 5 is a partial schematic view of the end face of the spool cylinder of the slide valve type hydraulic directional control valve with a special sealing spool structure (the sealing ring is installed in the valve body)
Reference numerals: 1-reversing valve body, 2-slide valve core, 3-sealing ring, 4-valve hole, 5-linear rolling bearing, 6-reset spring, 7-circular concave table shoulder, 8-edge angle, 9-transition chamfer of shoulder and valve hole, 10-circular diversion groove, 11-sealing groove on valve core, 12-sealing ring, 13-circular concave table, 14-sealing groove on valve body, 15-sealing ring, 16-chamfer of cylinder end face of valve core, 17-circular diversion groove
Detailed Description
Example one
A slide valve type hydraulic reversing valve with a special sealing valve core structure is a three-position four-way valve and comprises a reversing valve body 1, a return spring 6, a linear rolling bearing 5, a slide valve core 2 and a sealing ring component 3; the reversing valve is characterized in that the reversing valve body 1 is divided into a left valve body, a right valve body and a middle valve body, the end faces of the valve bodies are in sealing joint through sealing gaskets, the two reset springs 6 are respectively positioned in the left valve body and the right valve body, the sliding valve core 2 is of a cylindrical structure provided with a plurality of annular flow guide grooves 10, a cylinder at the left side of the sliding valve core 2 is rotatably connected to the left valve body 1 through a left linear rolling bearing 5, a cylinder at the right side of the sliding valve core 2 is rotatably connected to the right valve body 1 through a right linear rolling bearing 5, and the position needing sealing between the sliding valve core 2 and the valve body 1 is not in fit clearance sealing through a rigid shaft hole, but is provided with a sealing groove 11, and a high polymer material sealing ring 12 is arranged in the groove for sealing;
specifically, a macromolecule sealing ring 12 of the slide valve type hydraulic reversing valve is arranged on a valve core 2, a sealing groove 11 is arranged at a position, close to a left annular diversion groove 10, of a left cylinder of the valve core 2, a sealing groove is also arranged at a position, close to a right annular diversion groove, of a right cylinder of the slide valve core, sealing grooves are formed in two sides of a middle cylinder of the slide valve core, and the sealing rings 12 are assembled in the sealing grooves;
specifically, a valve hole 4 in the valve body 1 of the slide valve type reversing valve is vertically communicated with the multi-channel pore channel and is communicated with an annular concave table coaxial with the valve hole, and a shoulder 7 of the concave table and a transition chamfer 9 of the valve hole are linear, arc-shaped and linear and arc-shaped combined and are used for relieving instantaneous impact or shearing of a shoulder edge 8 on a sealing ring 12 when the valve core 2 of the slide valve moves and enters and exits a sealing area;
specifically, the valve body 1, the spool valve core 2 and the return spring 6 of the slide valve type hydraulic reversing valve are made of materials which are difficult to rust, such as copper and stainless steel, or are structures with inner and outer surfaces plated with anti-oxidation layers;
specifically, working media of the slide valve type hydraulic reversing valve are emulsion, water and other water-based transmission media;
specifically, the slide valve type hydraulic reversing valve is a hydraulic system of a water-based medium or a hydraulic reversing valve for a hydraulic support in a coal mine;
specifically, the sealing ring is an O-shaped sealing ring, a Y-shaped sealing ring, a V-shaped sealing ring or a special polymer sealing ring.
Specifically, the working principle of the slide valve type hydraulic reversing valve is as follows:
when the spool 2 of the slide valve moves left, the port P is communicated with the port B, and the port A is communicated with the port T; when the spool 2 of the slide valve moves rightwards, the port P is communicated with the port A, and the port B is communicated with the port T; the spool valve 2 of the slide valve is in the middle position, and the port P, the port A, the port B and the port T are not communicated.
Example two
A slide valve type hydraulic reversing valve with a special sealing valve core structure is a three-position four-way valve and comprises a reversing valve body 1, a return spring 6, a linear rolling bearing 5, a slide valve core 2 and a sealing ring component 3; the reversing valve is characterized in that the reversing valve body 1 is divided into a left valve body, a right valve body and a middle valve body, the end faces of the valve bodies are in sealing joint through sealing gaskets, the two reset springs 6 are respectively positioned in the left valve body and the right valve body, the sliding valve core 2 is of a cylindrical structure provided with a plurality of annular flow guide grooves 17, a cylinder at the left side of the sliding valve core 2 is rotatably connected to the left valve body 1 through a left linear rolling bearing 5, a cylinder at the right side of the sliding valve core 2 is rotatably connected to the right valve body 1 through a right linear rolling bearing 5, and the position needing sealing between the sliding valve core 2 and the valve body 1 is not in fit clearance sealing through a rigid shaft hole, but is provided with a sealing groove 14, and a high polymer material sealing ring 15 is arranged in the groove for sealing;
specifically, a polymer sealing ring 14 of the slide valve type hydraulic reversing valve is arranged in a valve body 1, a valve hole 4 in the reversing valve body 1 is vertically communicated with a multi-channel pore passage, an annular concave table 13 coaxial with the valve hole 4 is arranged at the communication position, sealing grooves 14 are arranged on two sides of the left annular concave table of the valve body, sealing grooves 14 are also arranged on two sides of the right annular concave table of the valve body, sealing grooves 14 are arranged on two sides of the middle annular concave table of the valve body, and a sealing ring 15 is assembled in each sealing groove 14;
specifically, a chamfer structure 16 is arranged at the positions of a plurality of annular diversion grooves 17 on a cylinder body of a valve core 2 of the slide valve type hydraulic reversing valve, chamfers 16 on the cylinder end surfaces at two sides of the plurality of annular diversion grooves are linear type, arc type and combination of linear type and arc type, and are used for slowing down the instantaneous impact or shearing of the edges and corners of the cylinder body of the valve core on a sealing ring when the valve core 2 of the slide valve moves and enters and exits a sealing area;
specifically, the valve body 1, the spool valve core 2 and the return spring 6 of the slide valve type hydraulic reversing valve are made of materials which are difficult to rust, such as copper and stainless steel, or are structures with inner and outer surfaces plated with anti-oxidation layers;
specifically, working media of the slide valve type hydraulic reversing valve are emulsion, water and other water-based transmission media;
specifically, the slide valve type hydraulic reversing valve is a hydraulic system of a water-based medium or a hydraulic reversing valve for a hydraulic support in a coal mine;
specifically, the sealing ring is an O-shaped sealing ring, a Y-shaped sealing ring, a V-shaped sealing ring or a special polymer sealing ring.
Specifically, the working principle of the slide valve type hydraulic reversing valve is as follows:
when the spool 2 of the slide valve moves left, the port P is communicated with the port B, and the port A is communicated with the port T; when the spool 2 of the slide valve moves rightwards, the port P is communicated with the port A, and the port B is communicated with the port T; the spool valve 2 of the slide valve is in the middle position, and the port P, the port A, the port B and the port T are not communicated.
Example three:
the invention can also be used for two-position two-way valves, two-position three-way valves, two-position four-way valves, two-position five-way valves, three-position five-way valves and the like with similar structures.
Claims (7)
1. A slide valve type hydraulic reversing valve with a special sealing valve core structure comprises a reversing valve body, a return spring, a linear rolling bearing, a slide valve core and a sealing ring; the reversing valve is characterized in that a cylinder on the left side of the sliding valve core is rotationally connected to the left valve body through a left linear rolling bearing, a cylinder on the right side of the sliding valve core is rotationally connected to the right valve body through a right linear rolling bearing, a plurality of annular diversion groove structures are arranged on the sliding valve core, the position needing to be sealed between the sliding valve core and the valve body is not sealed through a rigid shaft hole fit gap, but is provided with a sealing groove, and a high polymer sealing ring is arranged in the groove to seal.
2. A slide valve type hydraulic reversing valve with a special sealing valve core structure according to claim 1, wherein a high polymer sealing ring is installed on a valve core, a sealing groove is formed in a position, close to a left side flow guiding ring groove, of a left side column body of the slide valve core, a sealing groove is also formed in a position, close to a right side flow guiding ring groove, of a right side column body of the slide valve core, sealing grooves are formed in two sides of a middle column body of the slide valve core, and sealing rings are assembled in the sealing grooves.
3. A slide valve type hydraulic reversing valve with a special sealing valve core structure according to any one of claims 1 or 2, wherein a valve hole in the reversing valve body is vertically communicated with the multi-channel pore passage, an annular concave table coaxial with the valve hole is arranged at the communication position, and the transition chamfer of the shoulder of the concave table and the valve hole is linear, arc and combination of linear and arc, so that the slide valve is used for relieving the instantaneous impact or shearing of the edge angle of the shoulder on a sealing ring when the slide valve core moves and enters and exits a sealing area.
4. A slide valve type hydraulic reversing valve with a special sealing valve core structure according to claim 1, wherein a high polymer sealing ring is installed in a valve body, a valve hole in the reversing valve body is vertically communicated with the multi-channel hole, an annular concave table coaxial with the valve hole is arranged at the communication position, sealing grooves are formed in two sides of the left annular concave table of the valve body, sealing grooves are also formed in two sides of the right annular concave table of the valve body, sealing grooves are formed in two sides of the middle annular concave table of the valve body, and the sealing rings are assembled in the sealing grooves.
5. A slide valve type hydraulic reversing valve with a special sealing valve core structure according to any one of claims 1 or 4, wherein a chamfer structure is arranged at the position of a plurality of annular diversion grooves on a cylinder body of the slide valve core, chamfers of end faces of the cylinder bodies on two sides of the annular diversion grooves are linear, arc-shaped and a combination of the linear and the arc-shaped, and the chamfer structure is used for slowing down the instantaneous impact or shearing of edges and corners of the cylinder body of the valve core on a sealing ring when the slide valve core moves and enters and exits a sealing area.
6. A slide valve type hydraulic reversing valve with a special sealing valve core structure according to any one of claims 1 to 5, wherein working media of the hydraulic reversing valve are emulsion, water and other water-based transmission media.
7. The slide valve type hydraulic reversing valve with the special sealing valve core structure as claimed in any one of claims 1 to 6, wherein the hydraulic reversing valve is a hydraulic system of water-based media or a hydraulic reversing valve for a hydraulic support in a coal mine.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110103342.6A CN112762042A (en) | 2021-01-26 | 2021-01-26 | Slide valve type hydraulic reversing valve with special sealing valve core structure |
| PCT/CN2022/072094 WO2022161190A1 (en) | 2021-01-26 | 2022-01-14 | Slide valve type hydraulic reversing valve having special sealing valve core structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110103342.6A CN112762042A (en) | 2021-01-26 | 2021-01-26 | Slide valve type hydraulic reversing valve with special sealing valve core structure |
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| Publication Number | Publication Date |
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| CN112762042A true CN112762042A (en) | 2021-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110103342.6A Pending CN112762042A (en) | 2021-01-26 | 2021-01-26 | Slide valve type hydraulic reversing valve with special sealing valve core structure |
Country Status (2)
| Country | Link |
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| CN (1) | CN112762042A (en) |
| WO (1) | WO2022161190A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022161190A1 (en) * | 2021-01-26 | 2022-08-04 | 中国矿业大学(北京) | Slide valve type hydraulic reversing valve having special sealing valve core structure |
| CN118049499A (en) * | 2024-04-16 | 2024-05-17 | 气味王国(山东)科技有限公司 | Mute bistable electromagnetic double-cylinder valve |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117927523A (en) * | 2024-03-25 | 2024-04-26 | 西安华创马科智能控制系统有限公司 | Electro-hydraulic reversing valve core for pure water bracket, electro-hydraulic reversing valve and hydraulic bracket |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA586571A (en) * | 1959-11-10 | D. Ludwig Walter | Sliding valve spool seal | |
| DE4223358C2 (en) * | 1992-07-16 | 1994-11-03 | Festo Kg | Spool valve |
| CN101634371A (en) * | 2008-07-24 | 2010-01-27 | 费斯托(中国)有限公司 | Solenoid valve and valve core component thereof |
| CN101397921B (en) * | 2008-10-23 | 2010-04-07 | 浙江大学 | Electric driving fully variable valve actuator for air-powered engine |
| CN101893011A (en) * | 2010-07-30 | 2010-11-24 | 三一重工股份有限公司 | Hydraulic valve, hydraulic valve bank and control method thereof |
| CN103256401A (en) * | 2013-04-27 | 2013-08-21 | 浙江工业大学 | Prestretching-pretwisting type full-bridge 2D electro-hydraulic proportional directional valve |
| CN104265949B (en) * | 2014-09-24 | 2016-06-22 | 武汉华喜特种液压设备有限公司 | A kind of automatically controlled combination type guiding valve |
| CN112762042A (en) * | 2021-01-26 | 2021-05-07 | 中国矿业大学(北京) | Slide valve type hydraulic reversing valve with special sealing valve core structure |
-
2021
- 2021-01-26 CN CN202110103342.6A patent/CN112762042A/en active Pending
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2022
- 2022-01-14 WO PCT/CN2022/072094 patent/WO2022161190A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022161190A1 (en) * | 2021-01-26 | 2022-08-04 | 中国矿业大学(北京) | Slide valve type hydraulic reversing valve having special sealing valve core structure |
| CN118049499A (en) * | 2024-04-16 | 2024-05-17 | 气味王国(山东)科技有限公司 | Mute bistable electromagnetic double-cylinder valve |
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| Publication number | Publication date |
|---|---|
| WO2022161190A1 (en) | 2022-08-04 |
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