CN201615105U

CN201615105U - Oil circuit device with reversing valves connected in series

Info

Publication number: CN201615105U
Application number: CN2010201583724U
Authority: CN
Inventors: 何扬东
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-03-15
Filing date: 2010-03-15
Publication date: 2010-10-27
Anticipated expiration: 2020-03-15

Abstract

An oil circuit device with reversing valves connected in series comprises an input end P, an output end T, a first reversing valve (1), a second reversing valve (2) and an overflow valve (3), wherein the overflow valve (3) is connected between the input end P and the output end T; the pressure end P1 of the first reversing valve (1) is connected between the input end P and the overflow valve (3); the oil return end T2 of the second reversing valve (2) is connected between the output end T and the overflow valve (3); and the oil return end T1 of the first reversing valve (1) is connected in series with the pressure end P2 of the second reversing valve(2). When the first reversing valve (1) is in a neutral position, the input end P is in pipe communication with the oil return end T1 through the pressure end P1; and when the second reversing valve (2) is in a neutral position, the oil return end T1 is in pipe communication with the oil return end T2 through the pressure end P2. The two reversing valves work alternatively, so that oil flows in a pumping oil circuit and in a distribution oil circuit are supplemented by each other, and the impact caused by changes in direction are eliminated. Therefore, the work efficiency and the reliability of the hydraulic system of a concrete pump are improved.

Description

A kind of oil circuit device of selector valve series connection

Technical field

The utility model relates to the concrete pump hydraulic system, especially a kind of pumping of selector valve series connection and distribution oil circuit device.

Background technique

Hydraulic system works to drive its pumping installations, dispensing device and stirring apparatus in concrete pump.Known hydraulic system pumping and distribution oil circuit device, a kind of pumping and distribution oil circuit by the selector valve parallel connection constitutes an oil circuit device, i.e. two selector valve and the oil circuit devices that relief valve is formed by the 3-position 4-way function, the meta function of two main reversing valves is P, T, A, B are not connected; Another kind of is selector valve and a relief valve of a 3-position 4-way function by the pumping oil circuit device, and promptly selector valve and a relief valve of a 3-position 4-way function constitute with a distribution oil circuit device.The defective of these two kinds of hydraulic oil passage devices is that the former reversing impact is big, causes rate of fault rising, operating life to shorten; Two oil circuits of the latter can not complement each other, and oil stream usefulness is not in full use, and is prone to the phenomenon of distributing oil circuit to be short of power.Above-mentioned defective not only has a negative impact to the functional reliability of concrete pump, has also increased the manufacturing and the maintenance cost of product.

The model utility content

The technical problems to be solved in the utility model is at defective and the deficiency that prior art exists, to provide a kind of oil circuit device of selector valve series connection.This device helps both to eliminate reversing impact, can make the pumping oil circuit again and distribute the oily stream of oil circuit to complement each other, guarantee sufficient operation power, improve the working state of concrete pump, thereby improve service behaviour, working efficiency and the reliability of concrete pump hydraulic system.

Technical solution of the present utility model is, a kind of working oil path device of selector valve series connection, referring to Fig. 1, input end P, output terminal T, first selector valve 1, second selector valve 2 and relief valve 3 are arranged on the connection oil circuit of this device, wherein first selector valve 1 is drawn working end A1, working end B1, and second selector valve 2 is drawn working end A2, working end B2.Its technical characterstic is: described relief valve 3 is connected on the oil circuit between described input end P and the described output terminal T; Oil circuit pipe between described input end P and the relief valve 3 leads to the pressure end P1 that connects described first selector valve 1, and the oil circuit pipe between described output terminal T and the described relief valve 3 leads to the oil revolving end T2 that connects described second selector valve 2; The pressure end P2 tandem tube of the oil revolving end T1 of described first selector valve 1 and described second selector valve 2 leads to and connects, and is when described input end P is in meta at described first selector valve 1, logical through the oil revolving end T1 pipe of the pressure end P1 of first selector valve 1 and this first selector valve 1; When the oil revolving end T1 of described first selector valve 1 is in meta at second selector valve 2, lead to through the pressure end P2 of second selector valve 2 and the oil revolving end T2 pipe of this second selector valve 2.

Working principle of the present utility model is that referring to Fig. 1, hydraulic oil enters from input end P, is flowed out relief valve 3 setting oil circuit oil pressure reliefs by output terminal T.When first selector valve 1 and second selector valve 2 all are in meta, this device is in unloading condition, hydraulic oil is entered by input end P, pressure end P2 and oil revolving end T2 through the pressure end P1 of first selector valve 1 and oil revolving end T1, second selector valve 2 flow out from output terminal T, and four working ends (A1, B1, A2, B2) all do not have hydraulic oil and flow out.When first selector valve 1 be in meta, when second selector valve 2 alternately is in the position of its meta both sides, working end (A2, B2) is corresponding to be transformed to fuel-displaced or oil return; When second selector valve 2 be in meta, when first selector valve 1 alternately is in the position of its meta both sides, working end (A1, B1) is corresponding to be transformed to fuel-displaced or oil return.Two selector valves are alternately realized hydraulic oil (A1, B1, A2, B2) corresponding outflow, backflow or commutation from the working end, thereby make pumping oil cylinder and distributing valve oil cylinder obtain hydraulic power and commutation.

The beneficial effects of the utility model are, make the pumping oil circuit and distribute the oily stream of oil circuit to complement each other, and eliminate reversing impact, functional reliability and working efficiency are effectively strengthened and improve, thereby improved the working efficiency and the reliability of concrete pump hydraulic system.

Description of drawings

Fig. 1 is a structural representation of the present utility model, is denoted as among the figure:

1-first selector valve,

2-second selector valve,

The 3-relief valve.

Fig. 2 is the use reference drawing that the utility model is used for the concrete pump hydraulic system working oil path.

Embodiment

Present embodiment has input end P, output terminal T and first selector valve 1, second selector valve 2 and relief valve 3 as shown in Figure 1.First selector valve 1 has working end A1, working end B1; Second selector valve 2 has working end A2, working end B2.The relief valve 3 of this device adopts commercially available DB30 type relief valve.First selector valve 1, second selector valve 2 all adopt commercially available 4WEH25G type selector valve.Described each parts lead to by above-mentioned technical solution pipe and connect, and promptly relief valve 3 is connected on the oil circuit between input end P and the output terminal T; Oil circuit pipe between input end P and the relief valve 3 leads to the pressure end P1 that connects first selector valve 1, and the oil circuit pipe between output terminal T and the relief valve 3 leads to the oil revolving end T2 that connects second selector valve 2; The pressure end P2 tandem tube of the oil revolving end T1 of first selector valve 1 and second selector valve 2 leads to and connects, and is when input end P is in meta at first selector valve 1, logical through the oil revolving end T1 pipe of the pressure end P1 of first selector valve 1 and this first selector valve 1; When the oil revolving end T1 of first selector valve 1 is in meta at second selector valve 2, lead to through the pressure end P2 of second selector valve 2 and the oil revolving end T2 pipe of this second selector valve 2.Referring to Fig. 2, the routine oil circuit device of this of Gou Chenging is proved to be respond well through manufacturing experimently to try out thus, reaches designing requirement fully.

Claims

1. the working oil path device of selector valve series connection, input end P, output terminal T, first selector valve (1), second selector valve (2) and relief valve (3) are arranged on the connection oil circuit of this device, wherein first selector valve (1) is drawn working end A1, working end B1, second selector valve (2) is drawn working end A2, working end B2, it is characterized in that described relief valve (3) is connected on the oil circuit between described input end P and the described output terminal T; Oil circuit pipe between described input end P and the relief valve (3) leads to the pressure end P1 that connects described first selector valve (1), and the oil circuit pipe between described output terminal T and the described relief valve (3) leads to the oil revolving end T2 that connects described second selector valve (2); The pressure end P2 tandem tube of the oil revolving end T1 of described first selector valve (1) and described second selector valve (2) leads to and connects.