CN203717516U - Bypass pressure relief system - Google Patents

Bypass pressure relief system Download PDF

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Publication number
CN203717516U
CN203717516U CN201420009345.9U CN201420009345U CN203717516U CN 203717516 U CN203717516 U CN 203717516U CN 201420009345 U CN201420009345 U CN 201420009345U CN 203717516 U CN203717516 U CN 203717516U
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CN
China
Prior art keywords
oil
pipeline
cavity
resorption
epicoele
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Active
Application number
CN201420009345.9U
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Chinese (zh)
Inventor
宋银生
朱彦
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JIANGSU DAYANG PF Co Ltd
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JIANGSU DAYANG PF Co Ltd
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Priority to CN201420009345.9U priority Critical patent/CN203717516U/en
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Abstract

The utility model provides a bypass pressure relief system which comprises an oil tank, an upper cavity oil inlet pipeline, a lower cavity oil inlet pipeline, a replenishing valve and an oil return pipeline, wherein one end of the upper cavity oil inlet pipeline and one end of the lower cavity oil inlet pipeline are respectively connected with the oil tank, the other end of the upper cavity oil inlet pipeline and the other end of the lower cavity oil inlet pipeline are connected with an upper cavity and a lower cavity of a main cylinder of an oil cylinder respectively, the replenishing valve is arranged at the top of the upper cavity of the main cylinder of the oil cylinder, and the oil return pipeline is connected with the replenishing valve and the oil tank. A pressure relief pipeline is arranged on the upper cavity oil inlet pipeline and communicated with the upper cavity oil inlet pipeline and the oil tank, a pressure relief control valve is arranged on the pressure relief pipeline, and open and close of the pressure relief control valve control connection and disconnection of the pressure relief pipeline. Compared with the prior art, the bypass pressure relief system is simple in structure, redundant waiting time is omitted, pressure cannot be applied to the lower cavity oil inlet pipeline, time and labor are saved, production cost is greatly saved, and process and efficiency of production are facilitated.

Description

A kind of bypass pressure relief system
Technical field
The utility model is about press field, relates in particular to the oil cylinder pressure relief system in a kind of press.
Background technique
The pressure release of the cylinder upper cavity oil on press is now that the liquid-filling valve by being arranged on upper top of chamber carrys out the hydraulic oil of emitting gradually mostly, carries out pressure release, probably needs retard time several seconds from starting oil extraction to complete pressure release.Seem seldom although spend more several seconds when each pressure release, the pressure release number of times that this time is multiplied by every day can draw the time that waste every day in this pressure leak process, has affected greatly manufacturing efficiency, has reduced production results.Meanwhile, because cavity of resorption within this time is also in oil-feed, and be with the pressure of cavity of resorption, the oil of epicoele to be ejected, this has caused very large pressure just to cavity of resorption inflow pipeline, make cavity of resorption inflow pipeline fragile, not only increase cost of production, reduced too manufacturing efficiency.
Model utility content
The purpose of this utility model is to overcome the defect of prior art, the bypass pressure relief system that provide a kind of pressure release simple in structure, instant, can increase work efficiency.
For reaching aforementioned object, the utility model provides following technological scheme: a kind of bypass pressure relief system, include fuel tank, the epicoele inflow pipeline and the cavity of resorption inflow pipeline that have respectively one end to be connected with fuel tank, its the other end is connected with epicoele and the cavity of resorption of oil cylinder master cylinder respectively, be arranged on top of chamber and the liquid-filling valve being connected with oil cylinder master cylinder epicoele and the oil returning tube that connects liquid-filling valve and fuel tank on oil cylinder master cylinder, wherein hydraulic oil is extracted out from fuel tank, enter the epicoele of oil cylinder master cylinder by epicoele inflow pipeline, control after oil cylinder execution, from fuel tank, Extract force feed enters cavity of resorption inflow pipeline, enter again the cavity of resorption of oil cylinder master cylinder from cavity of resorption inflow pipeline, along with cavity pressure under oil cylinder master cylinder increases, liquid-filling valve is opened, hydraulic oil in oil cylinder master cylinder epicoele progressively enters oil returning tube by liquid-filling valve, then flow in fuel tank, a relief pipeline is set on wherein said epicoele inflow pipeline, described relief pipeline is communicated with described epicoele inflow pipeline and fuel tank, on described relief pipeline, be also provided with a pressure release control valve, opening of described pressure release control valve and being communicated with and disconnection of Closed control relief pipeline.
As preferred embodiment of the utility model, in the time that the cavity of resorption of described oil cylinder master cylinder starts oil-feed, described pressure release control valve is opened, and relief pipeline is communicated with; When the cavity of resorption oil-feed of described oil cylinder master cylinder finishes, described pressure release control valve closure, relief pipeline disconnects.
As preferred embodiment of the utility model, on described cavity of resorption inflow pipeline, be provided with oil-feed control valve, opening with the oil-feed of Closed control oil cylinder master cylinder cavity of resorption of described oil-feed control valve starts and end, described oil-feed control valve and described pressure release control valve synchronous switch.
As preferred embodiment of the utility model, described epicoele inflow pipeline adopts three-way pipe to be connected with described relief pipeline.
The beneficial effects of the utility model: compared with prior art, bypass pressure relief system of the present utility model, it is simple in structure, immediately pressure release, reduce the pressure of cavity of resorption inflow pipeline, greatly saved cost of production and production time, and be conducive to procedure, the efficient activity produced.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model bypass pressure relief system in a specific embodiment.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Alleged " embodiment " or " embodiment " refers to special characteristic, structure or the characteristic that can be contained at least one implementation of the utility model herein.Different local in this manual " in one embodiment " that occur not all refer to same embodiment, neither be independent or the embodiment mutually exclusive with other embodiments optionally.
Refer to Fig. 1, the structural representation of its utility model bypass pressure relief system in a specific embodiment.In this embodiment, bypass pressure relief system includes fuel tank 1, epicoele inflow pipeline 2, cavity of resorption inflow pipeline 3, relief pipeline 4, oil cylinder master cylinder 5, liquid-filling valve 6, oil returning tube 7 and three-way pipe 8.Wherein one end of epicoele inflow pipeline 2 and cavity of resorption inflow pipeline 3 is communicated to fuel tank 1, and the other end is communicated with epicoele 51 and the cavity of resorption 52 of oil cylinder master cylinder 5 respectively.Be provided with liquid-filling valve 6 at the top of the epicoele 51 of described oil cylinder master cylinder 5 coupled logical.Oil returning tube 7 is communicated with liquid-filling valve 6 and fuel tank 1.Relief pipeline 4 is connected by three-way pipe 8 with epicoele inflow pipeline 2, is also provided with pressure release control valve 41 on relief pipeline 4, opening of pressure release control valve 41 and being communicated with and disconnection of Closed control relief pipeline 4.On cavity of resorption inflow pipeline 3, be also provided with oil-feed control valve 31, opening with the oil-feed of the cavity of resorption 52 of oil cylinder master cylinder 5 described in Closed control of described oil-feed control valve 31 starts and end.
Pressure release control valve 41 and oil-feed control valve 31 synchronous switches, be that oil-feed control valve 31 is while opening when the cavity of resorption 52 of described oil cylinder master cylinder 5 starts oil-feed, described pressure release control valve 41 is opened, relief pipeline 4 is communicated with, now the hydraulic oil in the epicoele 51 of oil cylinder master cylinder 5 is most of by epicoele inflow pipeline 2 and the instant backflow oil-feed tank 1 of relief pipeline 4, fraction hydraulic oil is back in fuel tank 1 by liquid-filling valve 6 and oil returning tube 7, has eliminated the pressure in the epicoele 51 of oil cylinder master cylinder 5; Finishing when cavity of resorption 52 oil-feeds of described oil cylinder master cylinder 5 is oil-feed control valve 31 when closed, described pressure release control valve 41 closures, and relief pipeline 4 disconnects, cannot pressure release oil return, epicoele inflow pipeline 3 becomes inflow pipeline again.
The working principle of a kind of bypass pressure relief system of the utility model is: while starting working, hydraulic oil is drawn out of and enters epicoele inflow pipeline from fuel tank, enter in the epicoele of oil cylinder master cylinder by epicoele inflow pipeline, along with pressure in epicoele increases, piston is extruded and moves down again, complete after compulsory exercise, hydraulic oil is extracted out and is entered cavity of resorption inflow pipeline from fuel tank, oil-feed control valve on cavity of resorption inflow pipeline is opened, hydraulic oil enters in the cavity of resorption of oil cylinder master cylinder, when oil-feed control valve is opened, pressure release control valve on relief pipeline is synchronously opened, now the hydraulic oil in the epicoele of oil cylinder master cylinder is by epicoele inflow pipeline and relief pipeline backflow oil-feed tank, complete backflow and the pressure release of hydraulic oil, because the hydraulic oil in oil cylinder master cylinder epicoele and pressure are almost that moment is just drained, so it can not produce pressure to cavity of resorption inflow pipeline, reduce the stand-by period, alleviate the pressure of cavity of resorption inflow pipeline.In the time that the oil-feed of oil cylinder master cylinder cavity of resorption finishes, the oil extraction of its epicoele also completes, and now oil-feed control valve and pressure release control valve are simultaneously closed, and epicoele inflow pipeline becomes unidirectional inflow pipeline once again.
Bypass pressure relief system of the present utility model, it is simple in structure, without the unnecessary stand-by period, can not produce pressure to cavity of resorption inflow pipeline, not only time saving and energy saving, has greatly saved cost of production, and has been conducive to procedure and the efficient activity produced.
Above-mentioned explanation has fully disclosed embodiment of the present utility model.It is pointed out that and be familiar with the scope that any change that person skilled in art does embodiment of the present utility model does not all depart from claims of the present utility model.Correspondingly, the scope of claim of the present utility model is also not limited only to previous embodiment.

Claims (4)

1. a bypass pressure relief system, include fuel tank, the epicoele inflow pipeline and the cavity of resorption inflow pipeline that have respectively one end to be connected with fuel tank, its the other end is connected with epicoele and the cavity of resorption of oil cylinder master cylinder respectively, be arranged on the liquid-filling valve and the oil returning tube that is connected liquid-filling valve and fuel tank of top of chamber on oil cylinder master cylinder, wherein hydraulic oil is extracted out from fuel tank, enter the epicoele of oil cylinder master cylinder by epicoele inflow pipeline, control after oil cylinder execution, from fuel tank, Extract force feed enters cavity of resorption inflow pipeline, enter again the cavity of resorption of oil cylinder master cylinder from cavity of resorption inflow pipeline, along with cavity pressure under oil cylinder master cylinder increases, liquid-filling valve is opened, hydraulic oil in oil cylinder master cylinder epicoele progressively enters oil returning tube by liquid-filling valve, then flow in fuel tank, it is characterized in that: a relief pipeline is set on described epicoele inflow pipeline, described relief pipeline is communicated with described epicoele inflow pipeline and fuel tank, on described relief pipeline, be also provided with a pressure release control valve, opening of described pressure release control valve and being communicated with and disconnection of Closed control relief pipeline.
2. a kind of bypass pressure relief system according to claim 1, is characterized in that: in the time that the cavity of resorption of described oil cylinder master cylinder starts oil-feed, described pressure release control valve is opened, and relief pipeline is communicated with; When the cavity of resorption oil-feed of described oil cylinder master cylinder finishes, described pressure release control valve closure, relief pipeline disconnects.
3. a kind of bypass pressure relief system according to claim 2, it is characterized in that: on described cavity of resorption inflow pipeline, be provided with oil-feed control valve, opening with the oil-feed of Closed control oil cylinder master cylinder cavity of resorption of described oil-feed control valve starts and end, described oil-feed control valve and described pressure release control valve synchronous switch.
4. a kind of bypass pressure relief system according to claim 1, is characterized in that: described epicoele inflow pipeline adopts three-way pipe to be connected with described relief pipeline.
CN201420009345.9U 2014-01-08 2014-01-08 Bypass pressure relief system Active CN203717516U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420009345.9U CN203717516U (en) 2014-01-08 2014-01-08 Bypass pressure relief system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420009345.9U CN203717516U (en) 2014-01-08 2014-01-08 Bypass pressure relief system

Publications (1)

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CN203717516U true CN203717516U (en) 2014-07-16

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103758811A (en) * 2014-01-08 2014-04-30 江苏大洋精锻有限公司 Bypass pressure relief system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103758811A (en) * 2014-01-08 2014-04-30 江苏大洋精锻有限公司 Bypass pressure relief system

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