CN111927846B - High-precision pressure-stabilizing adjustable pressure reducing valve - Google Patents
High-precision pressure-stabilizing adjustable pressure reducing valveInfo
- Publication number
- CN111927846B CN111927846B CN202010830678.8A CN202010830678A CN111927846B CN 111927846 B CN111927846 B CN 111927846B CN 202010830678 A CN202010830678 A CN 202010830678A CN 111927846 B CN111927846 B CN 111927846B
- Authority
- CN
- China
- Prior art keywords
- liquid
- pressure
- rod
- valve core
- type valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-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
- F16K11/065—Multiple-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
- F16K11/07—Multiple-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
- F16K11/0716—Multiple-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 with fluid passages through the valve member
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/34—Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention discloses a high-precision pressure-stabilizing type adjustable pressure reducing valve which comprises a valve body, wherein a liquid inlet, a liquid outlet and a liquid return port are formed in the valve body, an integral rod type valve core is arranged in the valve body, a pressure regulating spring is arranged on the front end face of the rod type valve core, a liquid cavity is formed in the rear end face of the rod type valve core, and the liquid outlet is communicated with the liquid cavity at the rear end face of the rod type valve core through a liquid through pore. The cavity that the rear portion of rod-type case and return liquid mouth communicate is equipped with the guide pin bushing, is equipped with sealed pad between the mating surface of the front end rod-type case of guide pin bushing, and rod-type case front portion and rear portion are equipped with the sealing washer respectively, and the sealing washer of front portion is in the left side of inlet and liquid outlet all the time, and the sealing washer of rear portion is in the right side of liquid outlet and return liquid mouth all the time, and all dynamic seals do not pass through the cross hole on the circumference. The pressure regulating device can realize large-scale pressure setting, works stably, outputs accurate pressure value, greatly prolongs the service life of sealing elements and other key parts, remarkably improves the overall reliability and the comprehensive service life, has less liquid return amount, small pressure and energy loss, has no emulsion leakage in the whole process, and is more energy-saving and environment-friendly.
Description
Technical Field
The invention relates to a hydraulic support component for a coal mine, in particular to a high-precision pressure-stabilizing type adjustable pressure reducing valve.
Background
With the development of mechanized and automatic coal mining technologies, the requirements on the safety and reliability of mining hydraulic products are continuously improved, and a plurality of application occasions with special purposes and pressure requirements also appear. If the front end of the hydraulic motor is directly supplied with liquid by an emulsion pump station of a working face, the pressure often exceeds the rated pressure of the hydraulic motor, equipment is damaged, a pump with lower pressure is additionally arranged, larger waste and inconvenience are caused, and if supporting equipment in a roadway is used, the liquid supply pressure is often required to be smaller than that of the equipment of the working face, and the pump station is additionally arranged. Therefore, a pressure reducing control element which is stable, adjustable and accurate in pressure supply is needed, and meanwhile, the requirements of environmental protection and saving are met, and emulsion cannot be discharged out of the system.
In the first prior art, the pressure relief valve is similar to a safety valve with a residual liquid recovery function, namely when the system supply pressure exceeds the set value of a safety valve mechanism, the valve is used for pressure relief, and the pressure relief liquid returns to the system along with a liquid return pipeline and is even directly discharged. Because the structure similar to the safety valve does not have the capability of meeting the high-frequency opening and overflowing closing, the safety valve is extremely easy to damage, short in service life, large in pressure fluctuation range after pressure reduction, and easy to leak at a pressure release end to cause emulsion waste and environmental pollution.
In the second prior art, the pressure reducing valve with the hollow valve core realizes liquid flow through the side holes formed in the circumference of the hollow section of the cylindrical valve core, the defect is similar to that in the first prior art, the side holes in the circumference of the valve core repeatedly pass through sealing belts, the service life of a sealing ring is very limited, at least 4 sealing belts are arranged on the same circumference, the valve core resistance is very large, and the errors of the pressure reducing values in the initial stage and the later stage of use are large.
In the third prior art, the pressure reducing valve with the solid rod type valve core is adopted, the defects of the first and second prior art are partially avoided, but the liquid inlet and the liquid return cavity are not specially sealed, so that high-pressure liquid is always communicated with a liquid return pipeline, the pressure and energy loss are more, the liquid outlet pressure is not easy to keep at a constant value, the liquid outlet and the liquid return opening are communicated through an elongated hole with a strict diameter requirement, and once the small hole is blocked, the whole valve is invalid.
Disclosure of Invention
The invention aims to provide a high-precision pressure-stabilizing type adjustable pressure reducing valve.
The invention aims at realizing the following technical scheme:
the invention discloses a high-precision pressure-stabilizing type adjustable pressure reducing valve, which comprises a valve body, wherein a liquid inlet, a liquid outlet and a liquid return port are formed in the valve body;
the liquid outlet is respectively communicated with or disconnected from the liquid inlet and the liquid return port through the rod-type valve core;
the liquid outlet is communicated with a liquid cavity at the rear end face of the rod-type valve core through a liquid through pore.
According to the technical scheme provided by the invention, the high-precision pressure-stabilizing type adjustable pressure reducing valve provided by the embodiment of the invention can realize large-scale pressure setting, is stable in work and more accurate in output pressure value, greatly prolongs the service life of a sealing element and other key parts, remarkably improves the overall reliability and the comprehensive service life, has less liquid return amount and pressure and energy loss, is free from emulsion leakage in the whole process, and is more energy-saving and environment-friendly.
Drawings
Fig. 1 is a schematic structural diagram of a high-precision pressure-stabilizing adjustable pressure reducing valve according to an embodiment of the present invention.
In the figure:
1. the valve comprises a pressure regulating screw, a pressure regulating spring, a spring seat, a rod valve core, a sealing gasket, a guide sleeve, a pressing screw plug, a valve body and a liquid through pore.
Detailed Description
Embodiments of the present invention will be described in further detail below. What is not described in detail in the embodiments of the present invention belongs to the prior art known to those skilled in the art.
The invention relates to a high-precision pressure-stabilizing type adjustable pressure reducing valve, which has the following preferred specific embodiments:
The valve comprises a valve body, wherein a liquid inlet, a liquid outlet and a liquid return port are formed in the valve body, a rod type valve core is arranged in the valve body, a pressure regulating spring is arranged on the front end face of the rod type valve core, and a liquid cavity is formed in the rear end face of the rod type valve core;
the liquid outlet is respectively communicated with or disconnected from the liquid inlet and the liquid return port through the rod-type valve core;
the liquid outlet is communicated with a liquid cavity at the rear end face of the rod-type valve core through a liquid through pore.
One end of the pressure regulating spring is connected with the pressure regulating screw, and the other end of the pressure regulating spring is propped against the spherical surface of the front end of the rod type valve core through the spring seat.
The rear part of the rod type valve core is provided with a guide sleeve with a cavity communicated with the liquid return port, a sealing gasket is arranged between the matching surfaces of the rod type valve core at the front end of the guide sleeve, and the rear end of the guide sleeve is tightly pressed through a pressing screw plug.
The front part and the rear part of the rod type valve core are respectively provided with a sealing ring, the sealing ring at the front part is always at the left sides of the liquid inlet and the liquid outlet, and the sealing ring at the rear part is always at the right sides of the liquid outlet and the liquid return opening.
The rod valve core is an integral rod valve core.
The high-precision pressure-stabilizing type adjustable pressure reducing valve solves the problems of poor abrasion resistance, easy damage and low service life of the pressure reducing valve in the prior art, solves the problem of unstable pressure after pressure reduction in the prior art, and solves the problems of large pump station energy consumption, large pressure-releasing emulsion amount and easy waste and pollution during recovery in the prior art.
The technical principle is as shown in fig. 1:
the liquid is fed from the high-pressure liquid supply pipeline, the liquid is fed from the port A to the hydraulic motor or the hydraulic cylinder to be driven, and the liquid is returned from the port T to the liquid return pipeline of the system.
The port P and the port A are communicated through the small hole with calculated cross section area, when the pressure is smaller than the set pressure, the emulsion pressure flowing to the rear end face of the rod valve core through the liquid through hole on the valve body is insufficient to push the spring, and the valve core position is unchanged. When the pressure of the port P is gradually increased and the pressure of the port A is correspondingly increased to be larger than the set pressure value, the valve core moves leftwards, the opening of the valve port is reduced, and the resistance loss is increased until the valve core is positioned at the stress balance position. When the pressure of A continues to rise, the valve core continues to move left, at the moment, the large opening of the passage of P-A becomes a damping hole of an annular groove with the width of about 0.2mm, the pressure can be rapidly reduced, if the pressure does not reach the set pressure at the moment, the valve core continues to move left, the passage of A-T becomes a large opening passage from the damping hole, the pressure of A opening also can be rapidly reduced, and the valve core moves right to reset.
The integral rod type valve core does not have the condition that small holes on the circumference accelerate the abrasion of the sealing ring during the reciprocating motion.
The liquid through holes at the liquid outlet and the end face of the valve core are not used as damping holes, the diameter is obviously increased compared with similar products, and the failure of the pressure reducing valve caused by blockage of foreign matters or rusts is avoided.
The area ratio of the rod valve core and the sealing gasket matched with the rod valve core is accurately set, a single spring structure is adopted, and a high-strength and low-stiffness spring is selected, so that the pressure reducing valve is more sensitive in reaction and more accurate in pressure reducing value.
The invention has the advantages that:
The integral rod type valve core and the single spring are adopted to accurately calculate the flow, the structure is simplified under the condition of meeting the functions, the spring universality is better, and the number of parts, particularly small parts, is reduced;
The dynamic sealing non-hole design is adopted, so that the service life of the sealing element is effectively prolonged;
the function of the liquid-passing pore is single, so that the diameter can be freely determined, and the blockage is avoided;
the perfect internal sealing belt design ensures that all cavities are tightly sealed, so that excessive pressure fluctuation caused by mutual fluid channeling is reduced, and unnecessary emulsion and pressure loss are reduced;
Compared with similar products in the market, the adjustable range is greatly enlarged, and the current test and practical application prove that the adjustable range can cover 10-30 MPa for pressure reduction adjustment, so that the application adaptability of the product is greatly enhanced.
In a specific embodiment, as shown in fig. 1:
The liquid is fed from the high-pressure liquid feeding pipeline, the liquid is fed from the port A (liquid outlet) and is supplied to a hydraulic motor or a hydraulic cylinder to be driven, and the liquid is returned from the port T (liquid return port) and directly returns to the liquid return pipeline of the system. The port P and the port A are communicated through the small hole with calculated cross section area, when the hydraulic pressure is smaller than the set pressure, the emulsion hydraulic pressure flowing to the rear end face of the rod type valve core 4 from the liquid through small hole on the valve body 8 is insufficient to push the pressure regulating spring 2, and the position of the valve core 4 is unchanged. When the pressure of the port P is gradually increased and the pressure of the port A is correspondingly increased to be larger than the set pressure value, the valve core 4 moves leftwards, the opening of the valve port is reduced, and the resistance loss is increased until the valve core 4 is positioned at the stress balance position. When the pressure of the port A continues to rise, the valve core 4 continues to move left, at the moment, the large opening of the passage P-A becomes a damping hole of an annular groove with the width of about 0.2mm, the pressure can be rapidly reduced, and if the pressure is not reduced to reach the set pressure at the moment, the valve core 4 continues to move left, the passage A-T becomes a large opening passage from the damping hole, the pressure of the port A also can be rapidly reduced, and the valve core 4 moves right to reset.
The pressure setting in a large range can be realized, the work is stable, and the output pressure value is more accurate;
the service life of the sealing element and other key parts is greatly prolonged, and the overall reliability and the comprehensive service life are obviously prolonged;
the liquid return amount is small, the pressure and energy loss is small, no emulsion leaks in the whole process, and the energy conservation and the environmental protection are realized.
The key points of the technology of the invention are as follows:
the integral rod type valve core and the single spring are designed, so that the structure is simplified under the condition of meeting the functions, and the number of parts, particularly small parts, is reduced;
The dynamic seal is not provided with the structural design of the hole, so that the service life of the sealing element is effectively prolonged;
the liquid through holes at the liquid outlet holes have a single function, so that the diameter can be freely determined, and the possibility of blockage is reduced;
The perfect internal sealing design ensures that all cavities are tightly sealed, so that excessive pressure fluctuation caused by mutual fluid channeling is reduced, and unnecessary emulsion and pressure loss are reduced;
the adjustable range is large, and the pressure reduction adjustment of 10-30 MPa can be covered.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010830678.8A CN111927846B (en) | 2020-08-18 | 2020-08-18 | High-precision pressure-stabilizing adjustable pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010830678.8A CN111927846B (en) | 2020-08-18 | 2020-08-18 | High-precision pressure-stabilizing adjustable pressure reducing valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111927846A CN111927846A (en) | 2020-11-13 |
| CN111927846B true CN111927846B (en) | 2025-08-22 |
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ID=73305286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010830678.8A Active CN111927846B (en) | 2020-08-18 | 2020-08-18 | High-precision pressure-stabilizing adjustable pressure reducing valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN111927846B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115045882A (en) * | 2022-06-21 | 2022-09-13 | 烟台江山液压技术有限公司 | A valve core of a hydraulic safety valve and a hydraulic safety valve |
| CN118188622B (en) * | 2024-03-25 | 2025-08-08 | 中煤北京煤矿机械有限责任公司 | Bidirectional buffer logic control valve for hydraulic support |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678965A (en) * | 2012-05-25 | 2012-09-19 | 中煤北京煤矿机械有限责任公司 | Adjustable high-pressure lossless pressure-reducing valve for coal mine |
| CN212615688U (en) * | 2020-08-18 | 2021-02-26 | 中煤北京煤矿机械有限责任公司 | High-precision pressure-stabilizing adjustable pressure reducing valve |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002023854A (en) * | 2000-07-07 | 2002-01-25 | Fujikura Rubber Ltd | Reducing valve for liquid |
| KR200404834Y1 (en) * | 2005-10-19 | 2005-12-28 | 김범열 | Pressure reducing valve |
| CN204420231U (en) * | 2014-12-25 | 2015-06-24 | 苏州市内田液压机械设备贸易有限公司 | Automatic pressure reducing valve |
-
2020
- 2020-08-18 CN CN202010830678.8A patent/CN111927846B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678965A (en) * | 2012-05-25 | 2012-09-19 | 中煤北京煤矿机械有限责任公司 | Adjustable high-pressure lossless pressure-reducing valve for coal mine |
| CN212615688U (en) * | 2020-08-18 | 2021-02-26 | 中煤北京煤矿机械有限责任公司 | High-precision pressure-stabilizing adjustable pressure reducing valve |
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| Publication number | Publication date |
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| CN111927846A (en) | 2020-11-13 |
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