CN203051282U - QK-E20L pneumatic control lifting valve - Google Patents
QK-E20L pneumatic control lifting valve Download PDFInfo
- Publication number
- CN203051282U CN203051282U CN 201320028238 CN201320028238U CN203051282U CN 203051282 U CN203051282 U CN 203051282U CN 201320028238 CN201320028238 CN 201320028238 CN 201320028238 U CN201320028238 U CN 201320028238U CN 203051282 U CN203051282 U CN 203051282U
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- Prior art keywords
- valve
- spool
- piston
- control lifting
- return
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- Expired - Fee Related
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Abstract
The utility model discloses a QK-E20L pneumatic control lifting valve which comprises an air tap (1), a piston (3), a valve core (4), a valve body (5), a safety valve (7), a return device (8) and an oil return pipe (6). The QK-E20L pneumatic control lifting valve is characterized in that an end cover (2) is additionally arranged, the middle of the end cover is fixedly connected with the air tap, an air chamber is formed between the front end of the piston and the end cover, the connection position between the piston and the valve core is designed into a T-shaped groove, the T-shaped groove is in clearance fit with a T-shaped boss at the end of the valve core, an annular groove is positioned on the valve core, and an oil return through hole (9) is arranged in a cavity where a return spring at the right end of the valve body is arranged. The QK-E20L pneumatic control lifting valve can effectively, safely and stably guarantee control of a hydraulic oil way and prolong the service life of a hydraulic control element.
Description
Technical field
The utility model is mainly used in hydraulic system oil circuit control unit, especially can more effective, safer, more stably guarantee hydraulic circuit control, improves the QK-E20L air control lifting valve in the working life of hydraulic control component.
Background technique
The air control lifting valve is to realize that dump truck unloads the important hydraulic control device of thing automatically, hydraulic oil carries out fuel feeding and oil return by Pneumatic reversal valve to hydraulic jack, realize the hydraulic jack safe operation, the Pneumatic reversal valve that applies at present heavily block in the hydraulic system mainly contains following shortcoming and defect:
1, the air chamber piston is that integrated type is connected with changeover valve core, because what spool adopted is fitted seal, so the coaxality of this structural requirement piston and spool is higher, difficulty of processing is bigger in actual course of working, in use because of eccentricity issues, spool and piston resistance increase, and greatly reduce the working life of product;
2, changeover valve core ringless-type groove (balancing slit), in use spool can be subjected to instantaneous pressure and produce misalignment, thereby increases surface friction drag, stuck situation occurs;
3, the Returnning spring chamber does not have spill port, and because spool and valve body are intermittently to cooperate, long-play Returnning spring chamber will have fluid and flow into, and fluid can't be got rid of, and is pressed thereby produce, and makes execution air pressure increase.Therefore research and develop a kind of more effective, safer, more stably guarantee hydraulic circuit control, the QK-E20L air control lifting valve that improves the working life of hydraulic control component is that people look forward to.
The model utility content
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of more effective, safer, more stably guarantee hydraulic circuit control to improve the QK-E20L air control lifting valve in the working life of hydraulic control component.The purpose of this utility model realizes by following technical proposals, the utility model comprises valve, piston, spool, valve body, safety valve, returning device, return tube, it is characterized in that: set up an end cap, fixedly connected with valve in the end cap middle part, it is air chamber between piston nose and end cap, piston and spool joint are designed to the T connected in star, be connected with spool end T shape boss Spielpassung, offer circular groove on the spool, the chamber at valve body right-hand member return spring place is provided with the oil return through-hole that communicates with return opening.
The annular groove width that said spool is provided with is 0.3 mm-0.5 mm, and the degree of depth is 0.5 mm-1 mm, and spacing is 1 mm-5 mm.
After the improvement cylinder piston and spool Placement be T type groove Spielpassung, phase
Relatively, T type groove gap fiting mode has the following advantages, and 1. is convenient to the component dismounting, changes.2. the existence of matching gap makes spool energy self-control, centering in commutation process, has reduced because the commutation resistance that the step friction causes in spool step and the valve opening has guaranteed normality, the flexibility of commutation.Have wide 0.3 mm-0.5 mm on the spool after the improvement, the degree of depth is 0.5 mm-1 mm, and spacing is the circular groove (balancing slit) of 1 mm-5 mm, has following effect: the hydraulic coupling of (1) balanced spool circumferencial direction, reduce unbalanced hydraulic lateral power, prevent hydraulic lock.(2) can make spool and valve body hole keep concentric, reduce clearance leakage.From the related content of Elementary Fluid Mechanics as can be known, the leakage rate in donut gap is less than the leakage rate of eccentric circle czermak space.(3) oil storage is lubricated, reduce the chamber of valve core movement resistance at valve body right-hand member return spring place and be drilled with the oil return through-hole that communicates with return opening, make the hydraulic oil in the return process middle chamber can change oil sump tank voluntarily over to, reduce the commutation resistance, guarantee return function normal of spring.
From above-mentioned situation as can be known, the purpose of this utility model can realize.Compared with prior art, more effective, safer, more stably guarantee hydraulic circuit control, the working life of improving hydraulic control component.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
Embodiment 1, as shown in the figure, the utility model comprises valve 1, piston 3, spool 4, valve body 5, safety valve 7, returning device 8, return tube 6, it is characterized in that: set up an end cap 2, end cap is fixedlyed connected with valve body, fixedly connected with valve in the end cap middle part, it is air chamber between piston nose and end cap, piston and spool joint are designed to the T connected in star, be connected with spool end T shape boss Spielpassung, offer circular groove on the spool, the chamber at valve body right-hand member return spring place is provided with the oil return through-hole 9 that communicates with return opening.The annular groove width that said spool is provided with is 0.3 mm-0.5 mm, and the degree of depth is 0.5 mm-1 mm, and spacing is 1 mm-5 mm.
Claims (2)
1. QK-E20L air control lifting valve, comprise valve (1), piston (3), spool (4), valve body (5), safety valve (7), returning device (8), return tube (6), it is characterized in that: set up an end cap (2), fixedly connected with valve in the end cap middle part, it is air chamber between piston nose and end cap, piston and spool joint are designed to the T connected in star, be connected with spool end T shape boss Spielpassung, offer circular groove on the spool, the chamber at valve body right-hand member return spring place is provided with the oil return through-hole (9) that communicates with return opening.
2. QK-E20L air control lifting valve according to claim 1, it is characterized in that: the annular groove width that said spool is provided with is 0.3 mm-0.5 mm, and the degree of depth is 0.5 mm-1 mm, and spacing is 1 mm-5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320028238 CN203051282U (en) | 2013-01-21 | 2013-01-21 | QK-E20L pneumatic control lifting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320028238 CN203051282U (en) | 2013-01-21 | 2013-01-21 | QK-E20L pneumatic control lifting valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203051282U true CN203051282U (en) | 2013-07-10 |
Family
ID=48734240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320028238 Expired - Fee Related CN203051282U (en) | 2013-01-21 | 2013-01-21 | QK-E20L pneumatic control lifting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203051282U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108331795A (en) * | 2018-02-28 | 2018-07-27 | 浙江高宇液压机电有限公司 | The multi-way valve of floating connection gas control mechanism |
-
2013
- 2013-01-21 CN CN 201320028238 patent/CN203051282U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108331795A (en) * | 2018-02-28 | 2018-07-27 | 浙江高宇液压机电有限公司 | The multi-way valve of floating connection gas control mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20160121 |
|
| EXPY | Termination of patent right or utility model |