CN105370933A - Unloading one-way valve - Google Patents
Unloading one-way valve Download PDFInfo
- Publication number
- CN105370933A CN105370933A CN201510805344.4A CN201510805344A CN105370933A CN 105370933 A CN105370933 A CN 105370933A CN 201510805344 A CN201510805344 A CN 201510805344A CN 105370933 A CN105370933 A CN 105370933A
- Authority
- CN
- China
- Prior art keywords
- valve
- piston
- cavity
- spool
- control piston
- 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
Links
Classifications
-
- 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
- F15B13/027—Check 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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/06—Check valves with guided rigid valve members with guided stems
- F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses an unloading one-way valve in order to solve the problem that the operating power loss of a hydraulic pump of a hydraulic system of a cutting table of a harvester is large. The unloading 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 through a middle connecting hole. An annular valve seat is arranged at the connecting hole. A valve element capable of opening and closing the valve seat is arranged in the left cavity. An oil outlet is formed in the left cavity. A control piston used for controlling the valve element to open and close is arranged in the right cavity. An oil inlet is formed in the position, located on the left side of the control piston, of the right cavity. A control oil port is formed in the position, located on the right side of the piston, of the right cavity. Two oil holes are formed in the valve element. A piston cavity is formed in the control piston. A circle of unloading ring groove is formed in the periphery of the control piston. The unloading ring groove is provided with throttling oil holes communicated with the piston cavity.
Description
Technical field
The present invention relates to valve gate technology, be specifically related to a kind of discharging type one-way valve.
Background technique
The lifting of harvester header adopts hydraulic control usually, 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.Present way installs common Pilot operated check valve at the filler opening place of piston type cylinder, although this solves the internal leakage problem of spool-type valves, but oil hydraulic pump due to system is the pressure operation set up at pilot operated compound relief valve, and pilot operated compound relief valve set pressure is higher, make oil hydraulic pump power loss comparatively large, the power of loss all changes into heat, reaper generally works long hours, operating ambient temperature is higher again, system can be caused like this to generate heat serious, reduce working life.
Summary of the invention
The invention is intended to provide a kind of discharging type one-way valve, to solve the oil hydraulic pump problem that operationally power loss is large of the hydraulic system of harvester header.
Discharging type one-way 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 spool of valve seat able to turn on or off is provided with in left chamber, left chamber has oil outlet, the control piston controlling spool and open and close 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, spool has two oilholes, described control piston inside has piston cavity, and a circle off-load annular groove is provided with in control piston periphery, off-load annular groove has the throttling oilhole communicated with piston cavity.
Working principle of the present invention and as follows: for the hydraulic control system of harvester header, when oil hydraulic pump pressure oil output, when the handle of manipulation selector valve makes selector valve be in left position, high pressure oil exports from commutation valve port, enter discharging type one-way valve filler opening mouth, when high pressure oil enters in valve body through filler opening mouth, spool is moving to left, high pressure oil enters piston type cylinder from control port through one-way throttle valve, and plunger stretches out and drives the ceding of Taiwan to rise.
Selector valve is in meta, and commutation valve port is closed, and the spool of discharging type one-way valve is closed under cylinder oil effect, and oil cylinder oil inlet and oil return passage is disconnected, and the ceding of Taiwan rests on precalculated position.Because the leakage rate of discharging type Pilot operated check valve is very little, the quiet heavy amount of the ceding of Taiwan can meet the requirement of reaper.At this moment, the relief valve of fluid through being in unloading condition that oil hydraulic pump exports flows back to fuel tank.When the ceding of Taiwan need decline, handle selector valve handle and make selector valve be in right position, the pressure oil that oil hydraulic pump exports exports from commutation valve port the control port entering discharging type Pilot operated check valve, promotion control piston moves to left, back down spool, make oil cylinder start oil return, the ceding of Taiwan declines.At this moment the off-load annular groove on control piston and filler opening are connected, control oil and fuel tank communicate, due to the throttling action of the throttling oilhole on control piston, two ends, control piston left and right are made to there is pressure reduction and produce thrust left, back down spool, the hydraulic oil that such oil hydraulic pump exports returns fuel tank by Pilot operated check valve, oil hydraulic pump is in unloading condition substantially, this addresses the problem common Pilot operated check valve system oil pressure when piston type cylinder declines and increases problems such as causing power consumpiton increase, fluid heating.
Further, described spool has mounting groove, one end of spring is fixed on the bottom land of mounting groove, and the other end of spring is fixed on the inwall place of left chamber.Spring fitting is at the bottom land of mounting groove, and mounting groove plays stable effect to spring, and spring has the effect of compression to spool simultaneously, makes spool cut off two chambers reliably.
Further, be provided with the seal ring of ring-type in the inner circle of valve seat, during to guarantee cut-out two chambers, without internal leakage.
Further, spool has the valve head of taper, and valve seat has inner taper ring, and seal ring also has the inner taper identical with inner taper ring, and valve head can to offset closedown attachment hole with seal ring.By the valve head of taper and coordinating of seal ring, during Shuttoff Valve, No leakage can be guaranteed further.
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, cone valve 3, conical valve base 4, control piston 5, off-load annular groove 6, throttle orifice 7, piston cavity 8, filler opening A1, control port B1, oil outlet A2.
Embodiment is substantially as shown in Figure 1: the discharging type one-way valve of the present embodiment, valve body has the chamber of hollow, chamber is divided into left chamber and right chamber, left chamber and right chamber are communicated by middle attachment hole, left chamber has oil outlet, and 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, and the side being positioned at control port at control piston has concave ring groove.
Be provided with the valve seat of ring-type in connection hole, valve seat is provided with the seal ring of ring-type, and seal ring has inner taper, and be provided with moveable control piston in right chamber, piston is connected with piston rod.
Be provided with the spool of valve seat able to turn on or off in left chamber, spool has two oilholes, and control piston inside has piston cavity, and is provided with a circle off-load annular groove in control piston periphery, and off-load annular groove has the throttling oilhole communicated with piston cavity.Spool has mounting groove, and one end of spring is fixed on the bottom land of mounting groove, and the other end of spring is fixed on the inwall place of left chamber.Spool has the valve head of taper, and valve seat has inner taper ring, and the tapering of inner taper ring is identical with the tapering of seal ring, and valve head can to offset closedown attachment hole with seal ring.
In the present embodiment, 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. discharging type one-way 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 spool of valve seat able to turn on or off is provided with in left chamber, left chamber has oil outlet, the control piston controlling spool and open and close 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, spool has two oilholes, described control piston inside has piston cavity, and a circle off-load annular groove is provided with in control piston periphery, off-load annular groove has the throttling oilhole communicated with piston cavity.
2. discharging type one-way valve according to claim 1, is characterized in that: on described spool, have mounting groove, one end of spring is fixed on the bottom land of mounting groove, and the other end of spring is fixed on the inwall place of left chamber.
3. discharging type one-way valve according to claim 2, is characterized in that: the seal ring being provided with ring-type in the inner circle of valve seat.
4. discharging type one-way valve according to claim 3, is characterized in that: described spool has the valve head of taper, and valve seat has inner taper ring, and seal ring also has the inner taper identical with inner taper ring, and valve head can to offset closedown attachment hole with seal ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510805344.4A CN105370933A (en) | 2015-11-20 | 2015-11-20 | Unloading one-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510805344.4A CN105370933A (en) | 2015-11-20 | 2015-11-20 | Unloading one-way valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105370933A true CN105370933A (en) | 2016-03-02 |
Family
ID=55373389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510805344.4A Pending CN105370933A (en) | 2015-11-20 | 2015-11-20 | Unloading one-way valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105370933A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114776851A (en) * | 2022-04-17 | 2022-07-22 | 西安航空学院 | Self-closed pressure release valve for liquid storage system |
| CN115978227A (en) * | 2023-03-20 | 2023-04-18 | 余姚市三力信电磁阀有限公司 | Pilot-operated type two-position four-way electromagnetic valve |
-
2015
- 2015-11-20 CN CN201510805344.4A patent/CN105370933A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114776851A (en) * | 2022-04-17 | 2022-07-22 | 西安航空学院 | Self-closed pressure release valve for liquid storage system |
| CN114776851B (en) * | 2022-04-17 | 2023-04-07 | 西安航空学院 | Self-closed pressure release valve for liquid storage system |
| CN115978227A (en) * | 2023-03-20 | 2023-04-18 | 余姚市三力信电磁阀有限公司 | Pilot-operated type two-position four-way electromagnetic valve |
| CN115978227B (en) * | 2023-03-20 | 2023-05-26 | 余姚市三力信电磁阀有限公司 | Pilot-operated two-position four-way solenoid valve |
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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 |
|
| WD01 | Invention patent application deemed withdrawn after publication |