CN204201184U - Hydraulic lifting system flameproof apparatus - Google Patents
Hydraulic lifting system flameproof apparatus Download PDFInfo
- Publication number
- CN204201184U CN204201184U CN201420592488.7U CN201420592488U CN204201184U CN 204201184 U CN204201184 U CN 204201184U CN 201420592488 U CN201420592488 U CN 201420592488U CN 204201184 U CN204201184 U CN 204201184U
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- oil
- fluid port
- resorption
- hydraulic fluid
- cavity
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Abstract
A kind of hydraulic lifting system flameproof apparatus, comprise pipeline fitting and Pilot operated check valve, described Pilot operated check valve comprises valve body, valve body is arranged filler opening, pilot control hydraulic fluid port and oil outlet, wherein oil inlet pipe connects filler opening and pilot control hydraulic fluid port, and oil outlet is communicated with oil cylinder.First oil pocket and the second oil pocket are set in described valve body, spool is installed in the first oil pocket, first oil pocket is divided into epicoele and cavity of resorption, in described cavity of resorption, hydraulic fluid port is set, described filler opening is communicated with cavity of resorption with oil outlet, described epicoele is communicated with oil outlet by oil duct, and arrange spring in described epicoele, spool blocks hydraulic fluid port under the action of the spring.The utility model is without the need to the comparatively complicated explosion-proof valve of mounting structure, change use Pilot operated check valve into, structure is simple, cost is low, when its cavity of resorption decompression, spool lower end loses the support of pilot control piston, and return rapidly under the acting in conjunction of upper end oil pressure and spring, avoids dangerous generation fast and effectively.
Description
Technical field
The utility model relates to hydraulic system safety installations, particularly a kind of hydraulic lifting system flameproof apparatus.
Background technique
At present, hydraulic system is applied on lifting weight equipment because power ratio is large, transmission is convenient more and more widely, when oil cylinder cavity of resorption hydraulic pipe line bursts suddenly, oil cylinder just there will be Condition of Sudden Unloading, rapidly decline under gravity, not only cause mechanical failure, more easily cause security incident, therefore in hydraulic pipe line, adopt explosion-proof valve to be closed rapidly by oil cylinder cavity of resorption pipeline prevents oil cylinder stall from declining, and plays safety protection function.The employing flow control that existing explosion-proof valve has, speed exceedes flow velocity and namely requires to close, and its restriction regulates inconvenient, complex structure; Explosion relief valve disclosed in Chinese patent 201220487166.7, when there is explosion in pipeline, plug to be pushed back by spring and oil hydraulic cylinder oil pressure thus is blocked in loop by it, prevent the danger that hurtles down, but the design of its plug and spring can not seal pipeline rapidly when decompression, cannot peril be avoided completely to occur.
Summary of the invention
For deficiency of the prior art, the utility model provides a kind of hydraulic lifting system flameproof apparatus, and its structure is simple, easy for installation, makes the rapid return of spool when cavity of resorption pipeline decompression.
The technical solution adopted in the utility model is: a kind of hydraulic lifting system flameproof apparatus, comprise pipeline fitting and Pilot operated check valve, described Pilot operated check valve comprises valve body, valve body is arranged filler opening, pilot control hydraulic fluid port and oil outlet, wherein oil inlet pipe connects filler opening and pilot control hydraulic fluid port, and oil outlet is communicated with oil cylinder.
Described hydraulic lifting system flameproof apparatus, it is characterized in that: the first oil pocket and the second oil pocket are set in described valve body, spool is installed in the first oil pocket, first oil pocket is divided into epicoele and cavity of resorption, arrange hydraulic fluid port in described cavity of resorption, described filler opening is communicated with cavity of resorption with oil outlet, and described epicoele is communicated with oil outlet by oil duct, arrange spring in described epicoele, spool blocks hydraulic fluid port under the action of the spring.
Described hydraulic lifting system flameproof apparatus, is characterized in that: arrange pilot control piston in described second oil pocket, and the first oil pocket is stretched in described pilot control piston one end.
The utility model is without the need to the comparatively complicated explosion-proof valve of mounting structure, change use Pilot operated check valve into, structure is simple, cost is low, when its cavity of resorption decompression, spool lower end loses the support of pilot control piston, and return rapidly under the acting in conjunction of upper end oil pressure and spring, avoids dangerous generation fast and effectively.
Accompanying drawing explanation
Fig. 1 is the utility model hydraulic schematic diagram;
Fig. 2 is the utility model Pilot operated check valve structural representation;
Fig. 3 is the utility model Pilot operated check valve normal working schematic diagram;
Fig. 4 is the utility model Pilot operated check valve working state schematic representation when there is pipelines from bursting;
In figure: 1-valve body, 2-spool, 3-spring, 4-pilot control piston, 5-filler opening, 6-pilot control hydraulic fluid port, 7-oil outlet, 8-drain tap, 9-oil duct, 10-first oil pocket, 11-second oil pocket, 12-hydraulic fluid port.
Embodiment
As Fig. 1, hydraulic circuit comprises selector valve, one-way throttle valve, Pilot operated check valve and heavy burden oil cylinder, and one-way throttle valve inlet connects selector valve, and outlet connects Pilot operated check valve filler opening and pilot control hydraulic fluid port, and Pilot operated check valve oil outlet connects heavy burden oil cylinder.
As Fig. 2, first oil pocket 10 and the second oil pocket 11 is set in the valve body 1 of Pilot operated check valve, first oil pocket 10 is positioned at above the second oil pocket 11, spool 2 is vertically installed in the first oil pocket 10, and the first oil pocket 10 is divided into epicoele and cavity of resorption, arranges the hydraulic fluid port 12 of vertical direction in described cavity of resorption, valve body 1 is arranged the filler opening 5 and oil outlet 7 that are communicated with cavity of resorption, described epicoele is communicated with oil outlet 7 by oil duct 9, arranges the spring 3 mated with spool 2 in described epicoele, and spool 2 blocks hydraulic fluid port 12 under spring 3 acts on.In described second oil pocket 11, vertical direction arranges pilot control piston 4, the first oil pocket 10 is stretched in described pilot control piston 4 upper end, when being in limit position, pilot control piston 4 upper end, through hydraulic fluid port 12, valve body 1 is arranged and the pilot control hydraulic fluid port 6 be communicated with bottom the second oil pocket 11 and the drain tap 8 be communicated with the second oil pocket 11 top.
As Fig. 3, when Pilot operated check valve normally works, high pressure oil enters filler opening 5 and pilot control hydraulic fluid port 6 by selector valve and one-way throttle valve, pilot control piston 4 moves up under the effect of high pressure oil, and hydraulic fluid port 12, by spool 2 jack-up, is opened in its upper end, the cavity of resorption of the first oil pocket 10 is communicated with, high pressure oil enters heavy burden oil cylinder by oil outlet 7, and drive heavy burden cylinder efficient, the second oil pocket top fluid is discharged by drain tap 8.
As Fig. 4, when there is explosion in the pipeline being communicated with filler opening 5, the cavity of resorption of the first oil pocket 10 and the equal decompression of the second oil pocket, pilot control piston 4 loses thrust upwards, and the epicoele of the first oil pocket 10 is owing to being communicated with oil outlet 7, and therefore in it, oil pressure is equal with oil pressure in heavy burden oil cylinder, spool 2 declines rapidly under the epicoele oil pressure of the first oil pocket 10 and the acting in conjunction of spring 3, seal hydraulic fluid port 12, cut off heavy burden oil path in oil cylinder, stop it to decline.
Claims (3)
1. a hydraulic lifting system flameproof apparatus, it is characterized in that: comprise pipeline fitting and Pilot operated check valve, described Pilot operated check valve comprises valve body (1), valve body (1) is arranged filler opening (5), pilot control hydraulic fluid port (6) and oil outlet (7), wherein oil inlet pipe connects filler opening (5) and pilot control hydraulic fluid port (6), and oil outlet (7) is communicated with oil cylinder.
2. hydraulic lifting system flameproof apparatus according to claim 1, it is characterized in that: the first oil pocket (10) and the second oil pocket (11) are set in described valve body (1), spool (2) is installed in the first oil pocket (10), first oil pocket (10) is divided into epicoele and cavity of resorption, hydraulic fluid port (12) is set in described cavity of resorption, described filler opening (5) is communicated with cavity of resorption with oil outlet (7), described epicoele is communicated with oil outlet (7) by oil duct (9), arrange spring (3) in described epicoele, spool (2) blocks hydraulic fluid port (12) under spring (3) effect.
3. hydraulic lifting system flameproof apparatus according to claim 2, is characterized in that: arrange pilot control piston (4) in described second oil pocket (11), and the first oil pocket (10) is stretched in described pilot control piston (4) one end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420592488.7U CN204201184U (en) | 2014-10-14 | 2014-10-14 | Hydraulic lifting system flameproof apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420592488.7U CN204201184U (en) | 2014-10-14 | 2014-10-14 | Hydraulic lifting system flameproof apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204201184U true CN204201184U (en) | 2015-03-11 |
Family
ID=52659147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420592488.7U Active CN204201184U (en) | 2014-10-14 | 2014-10-14 | Hydraulic lifting system flameproof apparatus |
Country Status (1)
| Country | Link |
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| CN (1) | CN204201184U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286456A (en) * | 2016-10-26 | 2017-01-04 | 燕山大学 | A kind of hydraulic control one-way valve |
| CN107165882A (en) * | 2017-07-24 | 2017-09-15 | 德州博福智能液压装备制造有限公司 | A kind of electromagnetism hydraulic control one-way valve |
| CN113251186A (en) * | 2021-06-21 | 2021-08-13 | 宁波佳尔灵气动机械有限公司 | Internal pressure driven three-position two-way valve |
| CN114704676A (en) * | 2022-04-25 | 2022-07-05 | 中联重科股份有限公司 | Check valve and hydraulic control device with same |
-
2014
- 2014-10-14 CN CN201420592488.7U patent/CN204201184U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286456A (en) * | 2016-10-26 | 2017-01-04 | 燕山大学 | A kind of hydraulic control one-way valve |
| CN107165882A (en) * | 2017-07-24 | 2017-09-15 | 德州博福智能液压装备制造有限公司 | A kind of electromagnetism hydraulic control one-way valve |
| CN113251186A (en) * | 2021-06-21 | 2021-08-13 | 宁波佳尔灵气动机械有限公司 | Internal pressure driven three-position two-way valve |
| CN114704676A (en) * | 2022-04-25 | 2022-07-05 | 中联重科股份有限公司 | Check valve and hydraulic control device with same |
| CN114704676B (en) * | 2022-04-25 | 2022-12-02 | 中联重科股份有限公司 | Check valve and hydraulic control device with same |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |