CN201836129U

CN201836129U - Quick pressure lifting device for accumulator on hydraulic pump station

Info

Publication number: CN201836129U
Application number: CN2010202555878U
Authority: CN
Inventors: 马继刚; 宋建忠
Original assignee: SHANGHAI CHAOTIAN INDUSTRIAL Co Ltd
Current assignee: SHANGHAI CHAOTIAN INDUSTRIAL Co Ltd
Priority date: 2010-07-09
Filing date: 2010-07-09
Publication date: 2011-05-18
Anticipated expiration: 2020-07-09

Abstract

The utility model relates to a quick pressure-lifting device for an accumulator used on a hydraulic pump station, which comprises a hydraulic oil passage composed of an unloading overflow valve, a one-way sequence valve and an accumulator, wherein one end of the one-way sequence valve is connected with the input end of the accumulator, the unloading overflow valve is arranged on a pipeline between two input ends of an external electromagnetic directional valve, and the electromagnetic directional valve is connected with the oil passage of the one-way sequence valve. The utility model has the benefits of achieving the following purposes: the oil cylinder moves rapidly after release of high pressure oil in the accumulator and is pressurized immediately after rapidly moving in place, extra oil is filled into the accumulator for next use after the rated pressure is obtained, and after the pressure oil in the accumulator is saturated, the unloading oil passage is opened for unloading the oil pump.

Description

A kind of accumulator that is used for hydraulic power unit plays pressure device fast

Technical field

The utility model relates to hydraulic control technology, relates in particular to a kind of accumulator that is used for hydraulic power unit and plays pressure device fast.

Background technique

In the hydraulic system of some intermittent movements, preceding half section operating mode is low load rapid movement, and the second half section is the low speed heavy pressure motion, generally need reach being pressed onto back in kind hydraulic system to play pressure at once.For reducing cost and energy consumption, usually the mode that can adopt little displacement pump to add the accumulator repairing realizes this motion of oil cylinder, but the existing hydraulic system of unloading valve that adds with single pump is because of after the oil cylinder quicktrans is moving, the high pressure oil of accumulator is emitted, at this moment the pressure of accumulator is very low, has only usually about specified 1/3-1/2; Though oil cylinder puts in place because of accumulator discharges the high pressure oil rapid movement, can't pressurize at once; Because of the oil that oil pump is got, need to mend in the accumulator earlier, treat that the pressure that oil pressure rises in the oil cylinder of back in the accumulator just can boost, and has so promptly reduced working efficiency.In addition, if adopt the duplex high-pressure service pump to realize, then increased cost virtually.

The model utility content

At above defective, the utility model provides a kind of accumulator that is used for hydraulic power unit to play pressure device fast, to realize to discharge earlier high pressure oil in the accumulator by the oil cylinder rapid movement, after putting in place, rapid movement can pressurize again at once, after arriving rated pressure, unnecessary fluid can be charged in the accumulator again.

For achieving the above object, the utility model is by the following technical solutions:

A kind of accumulator that is used for hydraulic power unit plays pressure device fast, comprise the hydraulic circuit of forming by unloading overflow valve, one way sequence valve and accumulator, a wherein end of described one way sequence valve is connected with the accumulator input end, unloading overflow valve wherein is arranged on the pipeline between two input ends of external electromagnetic selector valve, and described solenoid directional control valve is connected with the oil circuit of one way sequence valve.

The beneficial effect that the accumulator that is used for hydraulic power unit described in the utility model plays pressure device fast is: can realize discharging earlier the high pressure oil of accumulator by the oil cylinder rapid movement, after putting in place, rapid movement can pressurize again at once, after arriving rated pressure, unnecessary fluid can be charged into again in the accumulator for using next time, and after energy storage pressure oil is saturated, open the off-load oil circuit with the oil pump off-load.

Description of drawings

With reference to the accompanying drawings the utility model is described in further detail below.

Fig. 1 is the inside connection diagram that the described accumulator that is used for hydraulic power unit of the utility model embodiment plays pressure device fast.

Among the figure:

1, unloading overflow valve; 2, one way sequence valve; 3, accumulator; 4, solenoid directional control valve.

Embodiment

As shown in Figure 1, the described accumulator that is used for hydraulic power unit of the utility model embodiment plays pressure device fast, comprise the hydraulic circuit of forming by unloading overflow valve 1, one way sequence valve 2 and accumulator 3, a wherein end of described one way sequence valve 2 is connected with accumulator 3 input ends, unloading overflow valve 1 wherein is arranged on the pipeline between two input ends of external electromagnetic selector valve 4, and described solenoid directional control valve 4 is connected with the oil circuit of one way sequence valve 2.During work, the setting pressure of unloading overflow valve 1 is P1 and a little more than the setting pressure P2 of one way sequence valve 2, like this when the pressure oil P of oil pump＞P2, pressure oil is added in the accumulator 3 by one way sequence valve 2, when the oil pressure in the accumulator 3 was mended P1, the off-load oil circuit of opening unloading overflow valve 1 by control oil channel K made oil pump off-load air transport moving to reach purpose of energy saving.When solenoid directional control valve 4 is opened, when oil cylinder travelled forward, the pressure oil in the accumulator 3 to Pa, flowed to oil cylinder by solenoid directional control valve 4 by the one-way valve on the one way sequence valve 2, and oil cylinder is travelled forward fast; Meanwhile, because of the low load movement of oil cylinder, the pressure oil of accumulator 3 is fast released, and the pressure among the oil circuit K is also followed decline, and unloading overflow valve 1 unloading function is closed, and like this, the pressure oil that oil pump comes out also flows to oil cylinder; When the oil cylinder motion puts in place, when load increased, oil circuit Pa pressure raise, during pressure in exceeding accumulator 3, one-way valve on the one way sequence valve 2 is closed, at this moment, the pressure oil that oil pump comes out all flows to oil cylinder by solenoid directional control valve 4, and oil cylinder working-pressure is with very fast arrival pressure P 2, pressure oil P is behind P2, the sequencing circuit of one way sequence valve 2 is opened, again to accumulator 3 repairings, and action before being returned to.

Claims

1. an accumulator that is used for hydraulic power unit plays pressure device fast, it is characterized in that: comprise the hydraulic circuit of forming by unloading overflow valve (1), one way sequence valve (2) and accumulator (3), a wherein end of described one way sequence valve (2) is connected with accumulator (3) input end, unloading overflow valve wherein (1) is arranged on the pipeline between two input ends of external electromagnetic selector valve (4), and described solenoid directional control valve (4) is connected with the oil circuit of one way sequence valve (2).