CN105370927A - Hydraulically-controlled one-way valve - Google Patents
Hydraulically-controlled one-way valve Download PDFInfo
- Publication number
- CN105370927A CN105370927A CN201510805725.2A CN201510805725A CN105370927A CN 105370927 A CN105370927 A CN 105370927A CN 201510805725 A CN201510805725 A CN 201510805725A CN 105370927 A CN105370927 A CN 105370927A
- Authority
- CN
- China
- Prior art keywords
- valve
- valve core
- spring
- valve element
- chamber
- 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.)
- Pending
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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
- F16K15/02—Check valves with guided rigid valve members
- F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
Abstract
The invention discloses a hydraulically-controlled one-way valve in order to solve the problem of internal leakage of an existing slide valve type reversing valve for a plunger type hydraulic cylinder. The hydraulically-controlled one-way valve comprises a valve body. A left cavity and a right cavity are formed in the valve body. The left cavity and the right cavity are communicated with each other through a middle connecting hole. An annular valve seat is arranged at the connecting hole. A valve element structure capable of opening and closing the valve seat is arranged in the left cavity. An oil outlet is formed in the left cavity. A movable control piston is arranged in the right cavity. An oil inlet is formed in the portion, on the left side of the control piston, of the right cavity. A control oil port is formed in the portion, on the right side of the piston, of the right cavity. The valve element structure comprises a valve element rod and a valve element head detachably connected with the valve element rod. The end of the valve element head is conical and can abut against the inner wall of the valve seat to close the connecting hole. The periphery of the valve element head is provided with a flange. A spring is arranged on the periphery of the valve element rod. One end of the spring abuts against the flange.
Description
Technical field
The present invention relates to field of instrumentation technology, particularly relate to a kind of Pilot operated check valve.
Background technique
Open-shut device is opened voluntarily by media flow or closes, and the valve flow backwards to prevent medium is called one-way valve.One-way valve belongs to self-acting valve class, also known as check valve or safety check, is mainly used on the pipeline of medium one-way flow, only allows medium to flow to a direction.Usually plunger type hydraulic oil cylinder is adopted in hydraulic system, and because spool-type valves structure is simple, cost is low, therefore many employings spool-type valves when controlling piston type cylinder motion, but spool-type valves is because existing matching gap between valve rod and valve opening, therefore just inevitably bring the internal leakage problem of valve.
Summary of the invention
The invention is intended to provide a kind of Pilot operated check valve, to solve the problem of the internal leakage that existing spool-type valves on plunger type hydraulic oil cylinder exists.
A kind of Pilot operated check valve in this programme, comprise valve body, left chamber and right chamber is respectively equipped with in valve body, left chamber and right chamber are communicated by middle attachment hole, the valve seat of ring-type is provided with in connection hole, the valve core structure of valve seat able to turn on or off is provided with in left chamber, left chamber has oil outlet, moveable control piston is provided with in right chamber, the left side right chamber being positioned at control piston has filler opening, the right side being positioned at piston has control port, the valve core head that described valve core structure comprises valve core rod and removably connects with valve core rod, the end of valve core head is taper and can offsets closedown attachment hole with the inwall of valve seat, the periphery of valve core head has flange, the periphery of valve core rod is provided with spring, spring one end is against on flange.
Working principle of the present invention is as follows: for harvester header hydraulic system for lifting loop, the Pilot operated check valve of this programme is arranged on the filler opening place of piston type cylinder, when selector valve is in neutral position, the fluid leading to Pilot operated check valve filler opening is disconnected, control port is communicated with mailbox by selector valve, the valve core rod of Pilot operated check valve and valve core head are closed under oil liquid pressure effect in spring force and oil cylinder, and the leakage rate of Pilot operated check valve is very little, can meet the quiet heavy requirement of oil hydraulic cylinder.When selector valve is in left position, oil hydraulic pump is to hydraulic pressure cylinder pump oil, and the maximum pressure of system can be set up by pilot valve relief valve.When selector valve is in right position, filler opening and the fuel tank of Pilot operated check valve communicate, and control port and oil hydraulic pump force feed mouth communicate, and under the effect controlling fluid, Pilot operated check valve is opened, and the fluid in oil cylinder flows back to fuel tank, and the plunger of plunger type cylinder declines.
The Pilot operated check valve of this programme can solve the problem of the internal leakage that the spool-type valves on plunger type hydraulic oil cylinder exists in summary.And, the valve core head that the Pilot operated check valve valve core structure of this programme comprises valve core rod and removably connects with valve core rod, the periphery of valve core head has flange, the periphery of valve core rod is provided with spring, spring one end is against on flange, during owing to using, spring easily lost efficacy, and therefore can be pulled down from valve core rod by spring easily by said structure and change.
Further, in order to make control piston when moving with valve core head contraposition more accurately, the end face of valve core head has the guiding groove that can offset with control piston rod end.
Further, the sidewall of left chamber is positioned at spring place and has via hole, the diameter of via hole is greater than the screw diameter of spring, is positioned at via hole place and is provided with seal ring and covers the bonnet on seal ring outside valve body.When spring changed by needs, only need spring to extract out from valve core rod, and open bonnet spring is taken out, facilitate the replacing of spring.
Further, in left chamber, be also provided with guide sleeve, described valve core rod is through described guide sleeve.When valve core rod moves, the effect of guiding is played in the motion of guide sleeve to valve core rod.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Embodiment
Below by embodiment, the present invention is further detailed explanation:
Reference character in Figure of description comprises: valve body 1, spring 2, valve core rod 3, conical valve base 4, control piston 5, guiding groove 6, valve core head 7, bonnet 8, seal ring 9.
Embodiment substantially as shown in Figure 1, the Pilot operated check valve of the present embodiment, valve body has the chamber of hollow, chamber is divided into left chamber and right chamber, and left chamber and right chamber are communicated by middle attachment hole, and left chamber has oil outlet, the left side right chamber being positioned at control piston has filler opening, the sidewall of right chamber is positioned at filler opening place and has annular groove, the right side being positioned at piston has control port, is positioned at control port place has another annular groove at the sidewall of right chamber.Be provided with the valve seat of ring-type in connection hole, valve seat is provided with the sealing gasket of ring-type, and be provided with moveable control piston in right chamber, piston is connected with piston rod.
The valve core structure of valve seat able to turn on or off is provided with in left chamber, the valve core head that the valve core structure of the present embodiment comprises valve core rod and removably connects with valve core rod, concrete valve core rod and valve core head are by spline joint, and also by being threaded, the present embodiment is preferably threaded.In left chamber, be also provided with guide sleeve, valve core rod is through described guide sleeve.
The end of valve core head is taper and can offsets closedown attachment hole with the inwall of valve seat, and the periphery of valve core head has flange, and the periphery of valve core rod is provided with spring, and spring one end is against on flange.The end face of valve core head has the guiding groove that can offset with control piston rod end.The sidewall of left chamber is positioned at spring place and has via hole, the diameter of via hole is greater than the screw diameter of spring, is positioned at via hole place and is provided with seal ring and covers the bonnet on seal ring outside valve body.
Above-described is only embodiments of the invention, and in scheme, the general knowledge such as known concrete structure and characteristic does not do too much description at this.Should be understood that; for a person skilled in the art, under the prerequisite not departing from structure of the present invention, some distortion and improvement can also be made; these also should be considered as protection scope of the present invention, and these all can not affect effect of the invention process and practical applicability.The protection domain that this application claims should be as the criterion with the content of its claim, and the embodiment in specification etc. record the content that may be used for explaining claim.
Claims (4)
1. a Pilot operated check valve, comprise valve body, left chamber and right chamber is respectively equipped with in valve body, left chamber and right chamber are communicated by middle attachment hole, the valve seat of ring-type is provided with in connection hole, the valve core structure of valve seat able to turn on or off is provided with in left chamber, left chamber has oil outlet, moveable control piston is provided with in right chamber, the left side right chamber being positioned at control piston has filler opening, the right side being positioned at piston has control port, it is characterized in that, the valve core head that described valve core structure comprises valve core rod and removably connects with valve core rod, the end of valve core head is taper and can offsets closedown attachment hole with the inwall of valve seat, the periphery of valve core head has flange, the periphery of valve core rod is provided with spring, spring one end is against on flange.
2. a kind of Pilot operated check valve according to claim 1, is characterized in that: on the end face of valve core head, have the guiding groove that can offset with control piston rod end.
3. a kind of Pilot operated check valve according to claim 1, it is characterized in that: on the sidewall of left chamber, be positioned at spring place have via hole, the diameter of via hole is greater than the screw diameter of spring, is positioned at via hole place and is provided with seal ring and covers the bonnet on seal ring outside valve body.
4. a kind of Pilot operated check valve according to claim 3, is characterized in that: in left chamber, be also provided with guide sleeve, and described valve core rod is through described guide sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510805725.2A CN105370927A (en) | 2015-11-20 | 2015-11-20 | Hydraulically-controlled one-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510805725.2A CN105370927A (en) | 2015-11-20 | 2015-11-20 | Hydraulically-controlled one-way valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105370927A true CN105370927A (en) | 2016-03-02 |
Family
ID=55373384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510805725.2A Pending CN105370927A (en) | 2015-11-20 | 2015-11-20 | Hydraulically-controlled one-way valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105370927A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110206918A (en) * | 2019-06-19 | 2019-09-06 | 刘艳文 | A kind of hydraulic control one-way valve |
| CN116175717A (en) * | 2022-11-29 | 2023-05-30 | 苏州艾维科斯园林设备有限公司 | Bidirectional rapid energy-saving efficient hydraulic log splitter |
-
2015
- 2015-11-20 CN CN201510805725.2A patent/CN105370927A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110206918A (en) * | 2019-06-19 | 2019-09-06 | 刘艳文 | A kind of hydraulic control one-way valve |
| CN116175717A (en) * | 2022-11-29 | 2023-05-30 | 苏州艾维科斯园林设备有限公司 | Bidirectional rapid energy-saving efficient hydraulic log splitter |
| CN116175717B (en) * | 2022-11-29 | 2023-11-14 | 苏州艾维科斯园林设备有限公司 | Bidirectional rapid energy-saving efficient hydraulic log splitter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160302 |
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| WD01 | Invention patent application deemed withdrawn after publication |