CN201858208U

CN201858208U - System with directional valves and pressure regulation oil path connected in series

Info

Publication number: CN201858208U
Application number: CN201020563804XU
Authority: CN
Inventors: 秦月明
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-10-11
Filing date: 2010-10-11
Publication date: 2011-06-08
Anticipated expiration: 2020-10-11

Abstract

The utility model discloses a system with directional valves and a pressure regulation oil path connected in series, comprising an input port P, an output port T, a first directional valve and a second directional valve, wherein the first directional valve and the second directional valve are arranged in an oil path between the input port P and the output port T and connected with each other. The system is characterized in that the input port P is connected with a port P1 of the first directional valve; a port T1 of the first directional valve is connected with a port P2 of the second directional valve; a port T2 of the second directional valve is connected with the output port T; a first overflow valve and a second overflow valve are arranged between the input port P and the output port T; the first overflow valve is arranged on the oil path between the input port P and the output port T; the second overflow valve is arranged on an oil path between the port T1 of the first directional valve and the output port T; and the pressure set by the first overflow valve is higher than that set by the second overflow valve. The system of the utility model has the advantages of being low in oil temperature, low in noise, long in service life, low in manufacture and maintenance cost, low in energy consumption and high in reliability.

Description

A kind of selector valve series voltage-regulating oil-way system

[technical field]

The utility model relates to Hydraulic Field, relates in particular to a kind of selector valve series voltage-regulating oil-way system.

[background technique]

Hydraulic system can be applicable to concrete or coal slime carry in the function of pumping, distribution and the stirring of finishing concrete or coal slime.Employed oil-way system during the existing hydraulic system liquid main distinction that is applied to concrete or coal slime conveying is pumping and distributes, in the existing technology, a kind ofly be to use single oil inlet passage, utilizing two selector valves in parallel to be respectively pumping again provides work with oily with distribution, another kind is to utilize two independent oil-feeds, cooperate two separate selector valves again, being respectively pumping and distribution provides work with oily, in these two kinds of oil-way systems, the former is because two selector valves are in state in parallel, can influence each other in the work, the oil circuit reversing impact is big, and oil circuit will be in high pressure conditions for a long time, part is worn out to break down, the latter needs two to overlap independently oil supply system, and not only energy consumption is big, the cost height, and two the cover oil supply system can not replenish mutually with related, occur easily cooperating not in place, the phenomenon that power performance is not strong, the utility model is under a kind of like this background technique and develop.

[model utility content]

Problem to be solved in the utility model is, defective at the prior art existence, a kind of selector valve series voltage-regulating oil-way system is provided, by change that oil circuit connects and the method for work schedule make this system help to reduce oil circuit working oil temperature, reduce operational noise, reduce the work energy consumption, improve parts working life, improve the reliability of hydraulic system.

In order to solve the technical problem of above-mentioned existence, the utility model adopts following technical proposal:

A kind of selector valve series voltage-regulating oil-way system, comprise inlet opening P, delivery outlet T, be installed in the oil circuit between inlet opening P and the delivery outlet T and interconnective first selector valve and second selector valve, it is characterized in that described inlet opening P is connected with the P1 mouth of first selector valve, the T1 mouth of first selector valve is connected with the P2 mouth of second selector valve, the T2 mouth of second selector valve is connected to delivery outlet T, also be provided with first relief valve between described inlet opening P and the delivery outlet T, second relief valve, first relief valve is installed on the oil circuit between inlet opening P and the delivery outlet T, and second relief valve is installed on the T1 mouth and the oil circuit between the delivery outlet T of first selector valve; Described first relief valve sets the pressure that pressure sets greater than second relief valve.

The utility model compared with prior art has following advantage:

By two selector valves are accurately controlled; make oil circuit only need to connect a selector valve constantly and come driving oil cylinder a job; and another selector valve be in reset mode make the hydraulic oil non-resistance by and make the oil cylinder that is connected on this selector valve be in the shutoff buffer status; can also regulate the maximum pressure of pumping and distribution oil circuit by two relief valves respectively; effectively protect oil-way system; therefore have that the oil temperature is low, noise is little, long service life, make the advantage that maintenance cost is low, energy consumption is low, reliability is high.

[description of drawings]

Be described in further detail below in conjunction with accompanying drawing and mode of execution of the present utility model:

Fig. 1 is the schematic diagram of oil-way system of the present utility model.

Fig. 2 is an oil-way system application drawing of the present utility model.

[embodiment]

Shown in Fig. 1～2, a kind of selector valve series voltage-regulating oil-way system, include inlet opening P, delivery outlet T, the P1 mouth of first selector valve 1 is connected with inlet opening P, the T1 mouth of first selector valve 1 is connected with the P2 mouth of second selector valve 2, the T2 mouth of second selector valve 2 is connected with delivery outlet T, the A1 of first selector valve 1, the B1 mouth is used to the pumping oil cylinder to provide work with oily, the A2 of second selector valve 2, the B2 mouth is used to and distributes oil cylinder to provide work with oily, first relief valve 3 is installed on the oil circuit between inlet opening P and the delivery outlet T, be used for regulating the maximum pressure that hydraulic oil enters first selector valve 1, second relief valve 4 is installed on the T1 mouth and the oil circuit between the delivery outlet T of first selector valve 1, be used for regulating the maximum pressure that hydraulic oil enters second selector valve 2, can carry out the maximum pressure qualification to pumping and distribution respectively by the relief valve 3 and second relief valve 4, both guarantee security of system, make pumping obtain higher working efficiency again.

Working procedure of the present utility model is as follows:

This oil-way system can carry out timesharing to two selector valves respectively and control step by step by the mode of electrichydraulic control or hydraulic control, can configure pumping before the work earlier and distribute required MTP; Working properly in order to guarantee, first relief valve, 3 set pressure are greater than second relief valve, 4 set pressure, thereby guarantee the down normal work of protective gear; When zero load, two selector valves are in reset mode, and hydraulic oil is from P mouth input, through first selector valve 1 and second selector valve 2, losslessly export from the T mouth; During work, first selector valve, 1 commutation 1Y end of control earlier or 2Y end, and second selector valve 2 is in reset mode, hydraulic oil promotes the work of pumping oil cylinder by the A1 or the B1 mouth of selector valve 1, because second selector valve 2 is in reset mode, lossless to hydraulic oil, so the hydraulic oil that enters from the P mouth all is used for the acting of pumping oil cylinder, make the maximum utilization of usefulness, and when the pump oil cylinder working, second selector valve is in reset mode, A2 and B2 mouth are in sealed condition, make and distribute oil cylinder to be in buffer status, has quite stable, after pumping is finished, first selector valve 1 resets, and second selector valve, 2 commutation 3Y ends or 4Y end, hydraulic oil from the P mouth is lossless pass through first selector valve 1 after, enter from the A2 of second selector valve 2 or B2 mouth and to distribute the oil cylinder, distribute oil cylinder to finish to share out the work thereby make, simultaneously in the process of distributing oil cylinder work, because first selector valve 1 is in reset mode, A1 and B1 mouth are in sealed condition, make the pumping oil cylinder have buffer capacity, so periodic duty just can realize the pumping oil cylinder and distribute the oil cylinder cooperating.

Claims

1. selector valve series voltage-regulating oil-way system, comprise inlet opening P, delivery outlet T, be installed in the oil circuit between inlet opening P and the delivery outlet T and interconnective first selector valve (1) and second selector valve (2), it is characterized in that described inlet opening P is connected with the P1 mouth of first selector valve (1), the T1 mouth of first selector valve (1) is connected with the P2 mouth of second selector valve (2), the T2 mouth of second selector valve (2) is connected to delivery outlet T, also be provided with first relief valve (3) between described inlet opening P and the delivery outlet T, second relief valve (4), first relief valve (3) is installed on the oil circuit between inlet opening P and the delivery outlet T, and second relief valve (4) is installed on the T1 mouth and the oil circuit between the delivery outlet T of first selector valve (1); Described first relief valve (3) sets the pressure that pressure sets greater than second relief valve (4).