CN109237056B - Cartridge formula preforming valve - Google Patents
Cartridge formula preforming valve Download PDFInfo
- Publication number
- CN109237056B CN109237056B CN201811272922.2A CN201811272922A CN109237056B CN 109237056 B CN109237056 B CN 109237056B CN 201811272922 A CN201811272922 A CN 201811272922A CN 109237056 B CN109237056 B CN 109237056B
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- China
- Prior art keywords
- valve
- spring
- seat
- valve core
- guide sleeve
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
- F16K1/38—Valve members of conical shape
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Safety Valves (AREA)
Abstract
The invention relates to a cartridge prepressing valve, belonging to the technical field of control valves. The invention mainly solves the technical problems of large volume, easy clamping of a valve core, poor pressure resistance and easy damage during installation and disassembly of the conventional prepressing valve. The technical scheme of the invention is as follows: a cartridge prepressing valve comprises a valve seat, a valve core, a guide sleeve, a first spring seat, a spring, a second spring seat and a steel wire retainer ring, wherein the valve seat is a hollow cylinder, and an outer circle step is arranged at the lower end of the outer side of the valve seat to realize the middle limit of the valve body; the valve core consists of a cone frustum and a hollow cylindrical guide rod, and is arranged at the upper end of the valve seat; the guide sleeve is a hollow cylinder, the hollow cylindrical guide rod of the valve core is arranged in a guide hole formed in the middle lower portion of the guide sleeve, the first spring seat is arranged at the top end of the hollow cylindrical guide rod of the valve core, the spring is arranged on the first spring seat, the second spring seat is arranged on the spring, and the steel wire check ring is arranged in a check ring groove formed in the upper portion of the spring mounting hole of the guide sleeve.
Description
Technical Field
The invention relates to a cartridge prepressing valve, belonging to the technical field of control valves.
Background
Directional valves are widely used and are indispensable control elements in hydraulic systems. In a hydraulic system, a pilot-operated reversing valve is often selected in a large-flow system, if a main oil way is not pressurized and an independent pilot oil supply way is not provided, a pre-pressure valve is installed at the moment to establish minimum pilot pressure, and a main valve core is operated to operate, so that the main oil way works.
The prepressing valve commonly used at present is a split type plug-in mounting structure, or a valve seat part is directly processed by a valve body, and the prepressing valve mainly has the following defects: 1. the volume is large, and the application occasion is limited; 2. the valve core is easy to clamp when opening and closing; 3. the valve body material has low strength and poor pressure resistance, and is easy to cause abrasion of an oil sealing line; 4. is not easy to be disassembled and assembled; 5. the sealing ring seals oil in the radial direction and is easy to damage during installation and disassembly.
Disclosure of Invention
The invention aims to solve the technical problems of large volume, easy clamping of a valve core, poor pressure resistance and easy damage during installation and disassembly of the conventional prepressing valve and provides a plug-in mounting type prepressing valve.
In order to solve the technical problems, the invention adopts the technical scheme that:
a cartridge prepressing valve comprises a valve seat, a valve core, a guide sleeve, a first spring seat, a spring, a second spring seat and a steel wire retainer ring, wherein the valve seat is a hollow cylinder, inner holes are through holes with the same diameter, edges at the upper end of the inner hole of the valve seat are kept sharp and matched with a conical surface of the valve core to form linear sealing to seal oil, and an outer circle step is arranged at the lower end of the outer side of the valve seat to realize middle limiting of a valve body; the valve core is composed of a cone frustum and a hollow cylindrical guide rod, the hollow cylindrical guide rod is arranged in the center of the top surface of the cone frustum and enables a hollow hole of the hollow cylindrical guide rod to be communicated with the cone frustum, a conical sealing surface is arranged at the bottom of the cone frustum, and the valve core is arranged at the upper end of the valve seat; the guide sleeve is a hollow cylinder, the middle lower part of the inner cavity of the guide sleeve is provided with a guide hole, and the middle upper part of the inner cavity of the guide sleeve is provided with a spring mounting hole; the hollow cylindrical guide rod of the valve core is arranged in a guide hole formed in the middle lower portion of the guide sleeve, the first spring seat is arranged at the top end of the hollow cylindrical guide rod of the valve core and located on the lower portion of the guide sleeve spring mounting hole, the spring is arranged on the first spring seat, the second spring seat is arranged on the spring and located on the upper portion of the guide sleeve spring mounting hole, and the steel wire check ring is arranged in a check ring groove formed in the upper portion of the guide sleeve spring mounting hole and fixes the second spring seat, the spring and the first spring seat in the guide sleeve spring mounting hole.
Further, the valve core is subjected to carburizing treatment.
Furthermore, the valve core is of a hollow structure, so that the main oil way is communicated with the pilot oil way, and an internal control mode is realized.
The invention has the beneficial effects that:
the plug-in type prepressing valve is of an integral structure, the valve core is provided with a guide part, the valve seat and the valve core are in linear sealing, the valve core and the valve core are made of wear-resistant materials, the valve core is subjected to carburization treatment, end face sealing is adopted, and the position is limited by the steel wire retainer ring, so that the technical problems that the existing prepressing valve is large in size, easy to clamp the valve core, poor in pressure resistance and easy to damage during installation and disassembly are solved. Compared with the background art, the invention has the advantages of high pressure resistance, small volume, light weight, convenient installation and use, reliable work and strong current capacity.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the present invention mounted on a valve body;
in the figure: the valve comprises a valve seat 1, a valve core 2, a guide sleeve 3, a first spring seat 4, a spring 5, a second spring seat 6, a steel wire retainer ring 7 and a sealing ring 8.
Detailed Description
The invention is further described below with reference to the figures and examples.
As shown in fig. 1 and 2, the cartridge prepressing valve in this embodiment includes a valve seat 1, a valve core 2, a guide sleeve 3, a first spring seat 4, a spring 5, a second spring seat 6, and a steel wire retainer ring 7, where the valve seat 1 is a hollow cylinder, inner holes are through holes with the same diameter, an edge at an upper end of an inner hole of the valve seat 1 is kept sharp and is matched with a conical surface of the valve core 2 to form a line seal, so as to seal oil, and an outer circular step is arranged at a lower end of an outer side of the valve seat 1, so that the valve seat 1 is limited in a; the valve core 2 consists of a cone frustum and a hollow cylindrical guide rod, the hollow cylindrical guide rod is arranged in the center of the top surface of the cone frustum and enables a hollow hole of the hollow cylindrical guide rod to be communicated with the cone frustum, a conical sealing surface is arranged at the bottom of the cone frustum, and the valve core 2 is arranged at the upper end of the valve seat 1; the guide sleeve 3 is a hollow cylinder, the middle lower part of the inner cavity of the guide sleeve 3 is provided with a guide hole, and the middle upper part of the inner cavity of the guide sleeve 3 is provided with a spring mounting hole; the hollow cylindrical guide rod of the valve core 2 is arranged in a guide hole arranged at the middle lower part of the guide sleeve 3, the first spring seat 4 is arranged at the top end of the hollow cylindrical guide rod of the valve core 2 and is positioned at the lower part of a spring mounting hole of the guide sleeve 3, the spring 5 is arranged on the first spring seat 4, the second spring seat 6 is arranged on the spring 5 and is positioned at the upper part of the spring mounting hole of the guide sleeve 3, and the steel wire retainer ring 7 is arranged in a retainer ring groove arranged at the upper part of the spring mounting hole of the guide sleeve 3 and fixes the second spring seat 6, the spring 5 and the first spring seat 4 in the spring mounting hole of the guide sleeve 3. And the sealing ring 8 is arranged between the valve seat 1 and the valve body to realize end surface oil sealing.
The valve core 2 is subjected to carburizing treatment.
The valve core 2 is of a hollow structure, so that a main oil way is communicated with a pilot oil way, and an internal control mode is realized.
The valve core 2 is in a cone valve core type and is used for free flow (small pressure drop) in one direction and reverse cut-off; the edge of the inner hole of the valve seat 1 is matched with the conical sealing surface of the valve core 2 to form linear sealing to realize the oil sealing function, so that the direct unloading of the inlet oil supply is ensured; the excircle of the valve seat 1 is in clearance fit with a valve body hole, so that only little leakage oil is ensured to be lost through a clearance; the valve core 2 is of a hollow structure, and oil enters the pilot oil supply area through a hollow hole in the middle of the valve core 2. The guide hole of the guide sleeve 3 plays a role in guiding, so that the valve core is quick and sensitive when opened, and the valve core 2 is automatically centered when closed. The first spring seat 4 and the second spring seat 6 support the spring 5, and the second spring seat 6 is in clearance fit with the spring mounting hole of the guide sleeve 3, so that the vibration of the spring is reduced. The position of the second spring seat 6 is limited by the wire retainer 7, so that the opening pressure of the check valve is kept constant. By changing the spring specification, different opening pressures can be achieved.
The working process of the invention is as follows:
oil in the oil inlet P flows through an inner hole of the valve seat 1, flows through a hollow hole in the middle of the valve core 2, enters a pilot oil supply area, and acts on the main valve core through a pilot control oil way. The hydraulic pressure of oil acts on the lower end face bearing surface of the valve core 2, so that the valve core 2 is acted by an upward acting force, the compression spring 5 acts on the downward force of the valve core 2, when the hydraulic pressure of an oil inlet P is larger than the initial set pressure of the spring 5, the valve core 2 moves upwards to leave the valve seat 1, and meanwhile, the oil acts on the main valve core to push the main valve core to act, and the work of a main oil way is realized. When the oil pressure of the oil inlet P is smaller than the initial set pressure of the compression spring 5, the valve core 2 is matched with the valve seat 1 to realize linear sealing oil sealing, so that the port P can establish the minimum pilot pressure for pushing the main valve core to act.
Claims (3)
1. A cartridge type prepressing valve is characterized in that: the oil seal valve comprises a valve seat (1), a valve core (2), a guide sleeve (3), a first spring seat (4), a spring (5), a second spring seat (6) and a steel wire retainer ring (7), wherein the valve seat (1) is a hollow cylinder, inner holes are through holes with the same diameter, edges at the upper end of the inner hole of the valve seat (1) are sharp and matched with the conical surface of the valve core (2) to form line seal, so that oil seal is realized, and the outer circle step is arranged at the lower end of the outer side of the valve seat (1) to realize limit in a valve body; the valve core (2) is composed of a cone frustum and a hollow cylindrical guide rod, the hollow cylindrical guide rod is arranged in the center of the top surface of the cone frustum and enables a hollow hole of the hollow cylindrical guide rod to be communicated with the cone frustum, a conical sealing surface is arranged at the bottom of the cone frustum, and the valve core (2) is arranged at the upper end of the valve seat (1); the guide sleeve (3) is a hollow cylinder, the middle lower part of the inner cavity of the guide sleeve (3) is provided with a guide hole, and the middle upper part of the inner cavity of the guide sleeve (3) is provided with a spring mounting hole; the hollow cylindrical guide rod of the valve core (2) is arranged in a guide hole formed in the middle lower portion of the guide sleeve (3), the first spring seat (4) is arranged at the top end of the hollow cylindrical guide rod of the valve core (2) and located at the lower portion of a spring mounting hole of the guide sleeve (3), the spring (5) is arranged on the first spring seat (4), the second spring seat (6) is arranged on the spring (5) and located at the upper portion of the spring mounting hole of the guide sleeve (3), and the steel wire check ring (7) is arranged in a check ring groove formed in the upper portion of the spring mounting hole of the guide sleeve (3) and fixes the second spring seat (6), the spring (5) and the first spring seat (4) in the spring mounting hole of the guide sleeve (3).
2. A cartridge precompression valve according to claim 1, further comprising: the valve core (2) is subjected to carburizing treatment.
3. A cartridge precompression valve according to claim 1 or 2, wherein: the valve core (2) is of a hollow structure, so that a main oil way is communicated with a pilot oil way, and an internal control mode is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811272922.2A CN109237056B (en) | 2018-10-25 | 2018-10-25 | Cartridge formula preforming valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811272922.2A CN109237056B (en) | 2018-10-25 | 2018-10-25 | Cartridge formula preforming valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109237056A CN109237056A (en) | 2019-01-18 |
| CN109237056B true CN109237056B (en) | 2020-04-03 |
Family
ID=65079081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811272922.2A Active CN109237056B (en) | 2018-10-25 | 2018-10-25 | Cartridge formula preforming valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109237056B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112228601A (en) * | 2020-09-27 | 2021-01-15 | 中核核电运行管理有限公司 | Anti-jamming valve core assembly of lubricating oil gear pump pressure release valve |
| CN112524112B (en) * | 2020-11-27 | 2023-02-03 | 太重集团榆次液压工业有限公司 | Differential pressure output valve |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2201539Y (en) * | 1994-06-06 | 1995-06-21 | 陈志坚 | Single spring prepressing valve |
| CN202091279U (en) * | 2011-06-01 | 2011-12-28 | 宁波克泰液压有限公司 | Thread cartridge buffering overflow valve |
| CN203009431U (en) * | 2012-12-26 | 2013-06-19 | 龙工（上海）桥箱有限公司 | Cushion valve for excavator motor |
| CN204186666U (en) * | 2014-10-15 | 2015-03-04 | 浙江华益机械有限公司 | A kind of plug-in type load holding valve and hydraulic load retentive control system |
| CN207437856U (en) * | 2017-11-20 | 2018-06-01 | 广东浩喜电器科技有限公司 | A kind of self-force type check valve |
-
2018
- 2018-10-25 CN CN201811272922.2A patent/CN109237056B/en active Active
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| Publication number | Publication date |
|---|---|
| CN109237056A (en) | 2019-01-18 |
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