CN105402449A - Hydraulically-controlled check valve - Google Patents
Hydraulically-controlled check valve Download PDFInfo
- Publication number
- CN105402449A CN105402449A CN201510985300.4A CN201510985300A CN105402449A CN 105402449 A CN105402449 A CN 105402449A CN 201510985300 A CN201510985300 A CN 201510985300A CN 105402449 A CN105402449 A CN 105402449A
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- CN
- China
- Prior art keywords
- chamber
- valve
- piston
- piston rod
- check valve
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- 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.)
- Granted
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Classifications
-
- 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
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/1221—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being spring-loaded
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a hydraulically-controlled check valve. The hydraulically-controlled check valve comprises a piston rod cavity, a load cavity, an upper control cavity, a lower control cavity and a valve body, wherein a valve sleeve is arranged in the valve body, a valve core is arranged in the valve sleeve, the upper end of the valve sleeve is connected with a limit assembly, the lower end of the valve sleeve is connected with a piston, the piston is further connected with the valve core, and the lower control cavity is arranged at the lower end of the piston. The piston rod cavity communicates with the load cavity when the valve sleeve moves upwards, and the piston rod cavity is disconnected with the load cavity when the valve sleeve returns to the original position. The piston rod cavity communicates with the upper control cavity when the valve core moves upwards, and the piston rod cavity is disconnected with the upper control cavity when the valve sleeve returns to the original position. Through the mode, the hydraulically-controlled check valve can simplify structure, flexibly acts, stably and reliably works and is low in manufacture cost.
Description
Technical field
The present invention relates to control valve field, particularly relate to a kind of Pilot operated check valve.
Background technique
One-way valve is that a kind of fluid can only flow into along import, and cannot from the position control valve of outlet return.Be applied to the occasion not allowing reverse fluid flow.Pilot operated check valve relies on to control hydrodynamic pressure, can make the valve of one-way valve reverse circulated.This valve occupies more important status in the hydraulic prop equipment of coal mine machinery.The difference of Pilot operated check valve and the common one-way valve oil circuit control K that has been many, when oil circuit control access failure pressure oil liquid, Pilot operated check valve works just as common one-way valve, and pressure oil only flows to outlet from import, can not reverse flow.When oil circuit control has pilot pressure to input, piston mandril backs down one-way valve under pressure oil effect, and oil inlet and outlet is communicated with, if oil outlet pressure is greater than inlet pressure, fluid will reverse flow.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of Pilot operated check valve, can simplified structure, is active in one's movements, and working stability is reliable, low cost of manufacture.
For solving the problems of the technologies described above, the technological scheme that the present invention adopts is: provide a kind of Pilot operated check valve, comprise: piston rod chamber, load chamber, upper control chamber, lower control chamber and valve body, valve pocket is provided with in described valve body, spool is provided with in described valve pocket, the upper end of described valve pocket is connected with limit assembly, the lower end of described valve pocket is connected with piston, described piston is also connected with spool, described lower control chamber is arranged at the lower end of piston, described valve pocket moves upward and piston rod chamber is communicated with load chamber, return original position and disconnect being communicated with of piston rod chamber and load chamber, described spool moves upward and piston rod chamber is connected with upper control chamber, return original position and disconnect being communicated with of piston rod chamber and upper control chamber.
In a preferred embodiment of the present invention, described spool is provided with the first radial hole, described limit assembly is provided with the second radial hole, and described limit assembly controls the first radial hole and is communicated with the second radial hole or disconnects.
In a preferred embodiment of the present invention, described limit assembly comprises adjusting screw rod and adjustment seat, described adjusting screw rod one end is connected with spool, the other end is connected in adjustment seat, described second radial hole is opened on adjusting screw rod, and described adjusting screw rod controls the first radial hole and is communicated with the second radial hole or disconnects.
In a preferred embodiment of the present invention, described adjusting screw rod upper end is provided with locking nut, and described locking nut is positioned in adjustment seat.
In a preferred embodiment of the present invention, below described piston, be connected with spacing screw plug.
In a preferred embodiment of the present invention, described valve pocket is connected with the first Returnning spring, described spool is connected with the second Returnning spring.
In a preferred embodiment of the present invention, described valve body upper end is also provided with protective cover, and described protective cover is connected to limit assembly upper end.
The invention has the beneficial effects as follows: Pilot operated check valve of the present invention, can simplified structure, be active in one's movements, working stability is reliable, low cost of manufacture.
Accompanying drawing explanation
In order to be illustrated more clearly in the technological scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings, wherein:
Fig. 1 is the structural representation of Pilot operated check valve one of the present invention preferred embodiment;
In accompanying drawing, the mark of each parts is as follows: 1, protective cover, and 2, locking nut, 3, adjustment seat; 4, adjusting screw rod, the 5, first Returnning spring, 6, valve body; 7, the second Returnning spring; 8, spool, 9, valve pocket, 10, piston; 11, spacing screw plug; K1, the second radial hole, K2, the first radial hole, R1, upper control chamber; R2, load chamber; R3, piston rod chamber, R4, lower control chamber, A1, upper control chamber active area; A2, poppet valve core active area; A3, valve pocket active area, A4, lower control chamber active area.
Embodiment
Be clearly and completely described to the technological scheme in the embodiment of the present invention below, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1, a kind of Pilot operated check valve, comprise: piston rod chamber R3, load chamber R2, upper control chamber R1, lower control chamber R4 and valve body 6, valve pocket 9 is provided with in described valve body 6, spool 8 is provided with in described valve pocket 9, the upper end of described valve pocket 9 is connected with limit assembly, the lower end of described valve pocket 9 is connected with piston 10, described piston 10 is also connected with spool 8, described lower control chamber R4 is arranged at the lower end of piston 10, described valve pocket 9 moves upward and piston rod chamber is communicated with R3 load chamber R2, return original position and disconnect being communicated with of piston rod chamber R3 and load chamber R2, described spool 8 moves upward and piston rod chamber R3 is connected with upper control chamber R1, return original position and disconnect being communicated with of piston rod chamber R3 and upper control chamber R1, the active area A4 of lower control cavity volume R4 respectively with the active area A2 of poppet valve core, two kinds of different area ratio are determined in the active area A3 combination of valve pocket
In addition, described spool 8 is provided with the first radial hole K2, described limit assembly is provided with the second radial hole K1, and described limit assembly controls the first radial hole K1 and is communicated with the second radial hole K2 or disconnects.
In addition, described limit assembly comprises adjusting screw rod 4 and adjustment seat 3, described adjusting screw rod 4 one end is connected with spool 8, the other end is connected in adjustment seat 3, described second radial hole K1 is opened on adjusting screw rod 4, and described adjusting screw rod 4 controls the first radial hole K2 and is communicated with the second radial hole K1 or disconnects.
In addition, described adjusting screw rod 4 upper end is provided with locking nut 2, and described locking nut 2 is positioned in adjustment seat 3.
In addition, spacing screw plug 11 is connected with below described piston 10.
In addition, described valve pocket 9 is connected with the first Returnning spring 5, described spool 8 is connected with the second Returnning spring 7.
In addition, described valve body 6 upper end is also provided with protective cover 1, and described protective cover 1 is connected to limit assembly upper end.
Pilot operated check valve specific works principle of the present invention is as follows: when pressure oil enters from piston rod chamber R3, the hydraulic coupling acted on valve pocket 9 is greater than spring force and the load force sum of the first Returnning spring 5, valve pocket 9 moves up, piston rod chamber R3 is communicated with load chamber R2, and pressure oil enters load chamber R2 from piston rod chamber R3;
When pressure oil enters from load chamber R2, the downward power acted on valve pocket 9 is greater than the power that valve pocket 9 is moved upward, and one-way valve is in closed condition, and load chamber R2 is not communicated with piston rod chamber R3.When the first radial hole K2 and the second radial hole K1 is in connected state, when the hydraulic coupling induced pressure be greater than in control chamber R1 of the pilot pressure generation of lower control chamber R4 acts on the hydraulic coupling that spool 8 produces, spool 8 moves upward, upper control chamber R1 is communicated with piston rod chamber R3 by the second radial hole K1 on spool 8, upper control chamber R1 pressure reduces, act on power downward on valve pocket 9 and be less than the power that valve pocket 9 is moved upward, valve pocket 9 moves upward, load chamber R2 is communicated with piston rod chamber R3, and pressure oil enters piston rod chamber R3 from load chamber R2.
When the first radial hole K2 and the second radial hole K1 is in blocking state, piston 10 moves upward and backs down spool 8 under the effect of the pilot pressure of lower control chamber R1, but because the first radial hole K2 is not communicated with the second radial hole K1, upper control chamber R1 cannot be communicated with piston rod chamber R3, the downward power acted on valve pocket 9 is still greater than the power making it to motion, one-way valve is still in closed condition, piston 10 continues to move upward under the effect of lower control chamber R4 pressure, piston 10 is made to withstand on valve pocket, when acting on the power upwards on valve pocket 9 and being greater than downward power, valve pocket 9 moves upward, one-way valve opens, pressure oil enters piston rod chamber R3 from load chamber R2.
Be different from prior art, Pilot operated check valve of the present invention, can simplified structure, be active in one's movements, working stability is reliable, low cost of manufacture.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (7)
1. a Pilot operated check valve, it is characterized in that, comprise: piston rod chamber, load chamber, upper control chamber, lower control chamber and valve body, valve pocket is provided with in described valve body, spool is provided with in described valve pocket, the upper end of described valve pocket is connected with limit assembly, the lower end of described valve pocket is connected with piston, described piston is also connected with spool, described lower control chamber is arranged at the lower end of piston, described valve pocket moves upward and piston rod chamber is communicated with load chamber, return original position and disconnect being communicated with of piston rod chamber and load chamber, described spool moves upward and piston rod chamber is connected with upper control chamber, return original position and disconnect being communicated with of piston rod chamber and upper control chamber.
2. Pilot operated check valve according to claim 1, is characterized in that, described spool is provided with the first radial hole, and described limit assembly is provided with the second radial hole, and described limit assembly controls the first radial hole and is communicated with the second radial hole or disconnects.
3. Pilot operated check valve according to claim 2, it is characterized in that, described limit assembly comprises adjusting screw rod and adjustment seat, described adjusting screw rod one end is connected with spool, the other end is connected in adjustment seat, described second radial hole is opened on adjusting screw rod, and described adjusting screw rod controls the first radial hole and is communicated with the second radial hole or disconnects.
4. Pilot operated check valve according to claim 3, is characterized in that, described adjusting screw rod upper end is provided with locking nut, and described locking nut is positioned in adjustment seat.
5., according to the arbitrary described Pilot operated check valve of claim 1-4, it is characterized in that, below described piston, be connected with spacing screw plug.
6. Pilot operated check valve according to claim 5, is characterized in that, described valve pocket is connected with the first Returnning spring, described spool is connected with the second Returnning spring.
7., according to the arbitrary described Pilot operated check valve of claim 6, it is characterized in that, described valve body upper end is also provided with protective cover, and described protective cover is connected to limit assembly upper end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510985300.4A CN105402449B (en) | 2015-12-25 | 2015-12-25 | Hydraulic control one-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510985300.4A CN105402449B (en) | 2015-12-25 | 2015-12-25 | Hydraulic control one-way valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105402449A true CN105402449A (en) | 2016-03-16 |
| CN105402449B CN105402449B (en) | 2018-01-23 |
Family
ID=55468114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510985300.4A Active CN105402449B (en) | 2015-12-25 | 2015-12-25 | Hydraulic control one-way valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105402449B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107504004A (en) * | 2017-09-13 | 2017-12-22 | 江苏恒立液压科技有限公司 | Novel pressure recuperation valve |
| CN114294283A (en) * | 2021-12-26 | 2022-04-08 | 浙江海宏液压科技股份有限公司 | Working valve plate and multi-way valve |
| CN114412862A (en) * | 2021-12-20 | 2022-04-29 | 郑州磨料磨具磨削研究所有限公司 | Ultrahigh pressure three-position three-way valve |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29509213U1 (en) * | 1995-03-24 | 1996-07-25 | O & K Orenstein & Koppel Ag, 13581 Berlin | Device for flow pressure-independent flow distribution in a spool for mobile construction and work machines |
| CN2463629Y (en) * | 2001-01-19 | 2001-12-05 | 温州市基安机械有限公司 | Large flow liquid-control one-way valve |
| US20110079300A1 (en) * | 2009-10-07 | 2011-04-07 | Gaplast Gmbh | One-way valve |
| CN203441509U (en) * | 2013-09-04 | 2014-02-19 | 巨隆集团芜湖兴隆液压有限公司 | Novel large-flow hydraulic control one-way valve |
| CN203770282U (en) * | 2014-04-14 | 2014-08-13 | 纪冬丽 | Compound hydraulic control one-way valve |
| CN204004614U (en) * | 2014-06-13 | 2014-12-10 | 苏州华徕光电仪器有限公司 | A kind of compound Pilot operated check valve |
| CN204201187U (en) * | 2014-11-17 | 2015-03-11 | 广东梅雁吉祥水电股份有限公司 | A kind of Pilot operated check valve |
| EP2944829A1 (en) * | 2013-11-20 | 2015-11-18 | Jiangsu Hengli Hydraulic Co., Ltd. | Pressure compensation valve |
| CN205383306U (en) * | 2015-12-25 | 2016-07-13 | 江苏恒立液压科技有限公司 | Hydraulic one -way valve |
-
2015
- 2015-12-25 CN CN201510985300.4A patent/CN105402449B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29509213U1 (en) * | 1995-03-24 | 1996-07-25 | O & K Orenstein & Koppel Ag, 13581 Berlin | Device for flow pressure-independent flow distribution in a spool for mobile construction and work machines |
| CN2463629Y (en) * | 2001-01-19 | 2001-12-05 | 温州市基安机械有限公司 | Large flow liquid-control one-way valve |
| US20110079300A1 (en) * | 2009-10-07 | 2011-04-07 | Gaplast Gmbh | One-way valve |
| CN203441509U (en) * | 2013-09-04 | 2014-02-19 | 巨隆集团芜湖兴隆液压有限公司 | Novel large-flow hydraulic control one-way valve |
| EP2944829A1 (en) * | 2013-11-20 | 2015-11-18 | Jiangsu Hengli Hydraulic Co., Ltd. | Pressure compensation valve |
| CN203770282U (en) * | 2014-04-14 | 2014-08-13 | 纪冬丽 | Compound hydraulic control one-way valve |
| CN204004614U (en) * | 2014-06-13 | 2014-12-10 | 苏州华徕光电仪器有限公司 | A kind of compound Pilot operated check valve |
| CN204201187U (en) * | 2014-11-17 | 2015-03-11 | 广东梅雁吉祥水电股份有限公司 | A kind of Pilot operated check valve |
| CN205383306U (en) * | 2015-12-25 | 2016-07-13 | 江苏恒立液压科技有限公司 | Hydraulic one -way valve |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107504004A (en) * | 2017-09-13 | 2017-12-22 | 江苏恒立液压科技有限公司 | Novel pressure recuperation valve |
| CN114412862A (en) * | 2021-12-20 | 2022-04-29 | 郑州磨料磨具磨削研究所有限公司 | Ultrahigh pressure three-position three-way valve |
| CN114294283A (en) * | 2021-12-26 | 2022-04-08 | 浙江海宏液压科技股份有限公司 | Working valve plate and multi-way valve |
| CN114294283B (en) * | 2021-12-26 | 2024-04-09 | 浙江海宏液压科技股份有限公司 | Working valve plate and multi-way valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105402449B (en) | 2018-01-23 |
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| CB02 | Change of applicant information |
Address after: Wujin high tech Zone Changzhou city Jiangsu province 213167 ryushi Road No. 88 Applicant after: JIANGSU HENGLI HYDRAULIC CO., LTD. Address before: Wujin high tech Zone Changzhou city Jiangsu province 213167 ryushi Road No. 88 Applicant before: JIANGSU HENGLI HYDRAULIC CO., LTD. |
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| GR01 | Patent grant |