CN2750094Y

CN2750094Y - Reversing valve plate

Info

Publication number: CN2750094Y
Application number: CN 200420113580
Authority: CN
Inventors: 白海鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-11-19
Filing date: 2004-11-19
Publication date: 2006-01-04
Anticipated expiration: 2014-11-19

Abstract

The utility model relates to a reversing valve plate, which solves the problems that the existing reversing valve plates require high processing and assembly precision and are high in failure rate, etc. The utility model is provided with a valve body, and the inner part of the valve body is provided with a working cavity, a pressure cavity, a valve plate oil inlet cavity, a valve plate oil returning cavity, a load discharging cavity and an oil returning cavity. A one-way valve is arranged between the valve plate oil inlet cavity and the pressure cavity, and the inner part of the valve body is provided with a hollow valve stem. The valve stem is provided with an annular groove corresponding to the valve plate oil inlet cavity and the valve plate oil returning cavity in the valve body. The utility model is characterized in that the valve plate oil returning cavity is positioned at both sides of the valve plate oil inlet cavity, and the valve stem is provided with two sets of oil holes corresponding to the working cavity. The valve stem is also provided with two sets of oil holes corresponding to the space between the valve plate oil returning cavity and the pressure cavity. The reversing valve plate has the advantages that the one-way valve in the valve stem is removed, production cost and processing difficulty are reduced, and the operation mode that the valve plate reverses via the action of the one-way valve in the valve stem is changed. The valve stem directly controls the valve plate to reverse, so failure rate is low and a linking function between every two valve plates is achieved. Furthermore, a hydraulic valve can not generate heat, which ensures the operating reliability of the hydraulic valve.

Description

Reversing valve plate

Technical field

The utility model belongs to a kind of hydrovalve, particularly a kind of stack combinations, is used for the Reversing valve plate of multiple directional control valve.

Background technique

Multiple directional control valve is the core hydraulic element in the construction machinery hydraulic systems such as excavator, loader, development machine, is used for handling the motion with each parts of Control Engineering machinery, realizes the centralized control of a plurality of actuators.Existing multiple directional control valve adopts multi-disc overlapping structure more, and soon the valve block combine and assemble of multi-disc difference in functionality constitutes the multiple directional control valve with certain function together.Reversing valve plate is a valve block on the multiple directional control valve, and its effect is under the condition that is not subjected to load effect, to make a plurality of equipments realize the series connection synchronous working.It is mainly by valve body, hollow valve rod, and is assemblied in the formations such as one-way valve in the hollow valve rod.Be provided with active chamber, pressure chamber, valve block oil suction chamber, valve block oil back chamber, drain charge chamber and oil back chamber in valve body, wherein, the valve block oil suction chamber is positioned at the both sides of valve block oil back chamber, between valve block oil suction chamber and pressure chamber one-way valve is housed.On valve rod, have with valve body in valve block oil suction chamber, valve block oil back chamber and the corresponding annular recess of pressure chamber, corresponding oil suction chamber has two groups of oblique oilholes on valve rod, and two groups of oilholes are arranged between corresponding drain charge chamber and the active chamber.The commutation of this valve block realizes by the action of one-way valve in the hollow valve rod, and the one-way valve in the hollow valve rod is opened by induced pressure, because hydraulic oil has some pollutants and produces in the process of using, thereby in the process of commutation, one-way valve in the hollow valve rod is stuck easily, rate of fault is higher, thereby makes the hydraulic circuit cisco unity malfunction, and the commutation function of valve block can't realize.And during valve block work, one-way valve rubs mutually with hollow valve rod in the process of frequent movement, produce a large amount of heat, the temperature of hydraulic oil is raise, the stickiness of hydraulic oil changes, thereby cause oil leakage phenomenon occurring, the hydrovalve cisco unity malfunction between each component in the valve.In addition, because the endoporus of hollow valve rod matches with one-way valve, thereby, the processing more complicated, the requirement on machining accuracy height, so production cost is higher, and the matching requirements of this valve block are also than higher, during assembling, the end easy deformation of valve rod, in case and the valve rod end deforms, the quality of fit and the valve rod that will influence valve reset.

Summary of the invention

The technical problems to be solved in the utility model is, overcomes existing Reversing valve plate to processing and problems such as assembly precision requirement height, rate of fault height, and a kind of processing and assembling is easy, rate of fault is low Reversing valve plate are provided.

The utility model has a valve body, active chamber, pressure chamber, valve block oil suction chamber, valve block oil back chamber, drain charge chamber and oil back chamber are arranged in the valve body, between valve block oil suction chamber and pressure chamber, one-way valve is housed, hollow valve rod is installed in valve body, have on the valve rod with valve body in valve block oil suction chamber, the corresponding annular recess of valve block oil back chamber, its special way is, described valve block oil back chamber is positioned at the both sides of valve block oil suction chamber, corresponding active chamber has two groups of oilholes on valve rod, is also having two groups of oilholes on the valve rod between corresponding valve block oil back chamber and the pressure chamber.

Advantage of the present utility model is, removed the one-way valve in the valve rod, not only saved cost of production, also reduced difficulty of processing, make processing and assembling easier, simultaneously, changed the working method that the valve block commutation leans on the action of valve rod internal check valve to realize, the valve block commutation is directly controlled with valve rod, thereby rate of fault is low, has guaranteed the proper functioning of hydraulic circuit, and has realized the interlock function between valve block, and, in the process of work, hydrovalve can not generate heat, and it is fixed that the temperature of hydraulic oil remains weighing apparatus, guarantee the reliability of hydrovalve work, and improved working efficiency.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the B-B sectional view of Fig. 1;

Fig. 4 is the C-C sectional view of Fig. 1;

Fig. 5 is a fundamental diagram of the present utility model.

Embodiment

As shown in drawings, the utility model has a valve body 1, active chamber A, active chamber B, pressure chamber C, valve block oil suction chamber P1, valve block oil back chamber P2, drain charge chamber D and oil back chamber T are arranged in valve body 1, described drain charge chamber D is connected with oil back chamber T, and valve block oil back chamber P2 is positioned at the both sides of valve block oil suction chamber P 1; Between valve block oil suction chamber P1 and pressure chamber C, one-way valve is housed, described one-way valve is made of spool 6, valve gap 4 and spring 5, spring 5 is installed between valve gap 4 and the spool 6, valve gap 4 is installed on the

valve body

1,3 sealings of valve gap 4 usefulness seal rings, when valve block oil suction chamber P1 communicated with valve block oil back chamber P2, one-way valve was closed under the effect of spring 5, when valve block oil suction chamber P1 and valve block oil back chamber P2 are obstructed, open under the effect of one-way valve hydraulic oil in valve block oil suction chamber P1; Hollow valve rod 2 is installed in valve body 1, have on the valve rod 2 with valve body in the corresponding annular recess E1 of valve block oil suction chamber P1, valve block oil back chamber P2, E2; Corresponding active chamber A, B have two groups of oilhole F2, F4 on valve rod 2, are also having two groups of oilhole F1, F3 on the valve rod 2 between corresponding valve block oil back chamber P2 and the pressure chamber C; The two ends of valve rod 2 seal with seal ring 12, and at seal ring 12 places dust ring 13 are installed, and avoid dust to enter; In the operating end of valve rod 2 handle joint 15 is installed,

seal ring

16,17 is housed between handle joint 15 and valve rod 2, oil-proof between the two to guarantee; Operating end at valve rod 2 also is equipped with handle frame 14, and handle frame 14 is fixed on the valve body 1; The other end at valve rod 2 is equipped with locating column 10, for being threaded,

seal ring

16,17 is housed between the two between locating column 10 and the valve rod 2, and is oil-proof to guarantee it; In this end of valve rod 2 baffle plate 7 and end cap 11 are housed also, baffle plate 7 and end cap 11 are fixed on the valve body 1; Be separately installed with a spring seat 9 in the end of valve rod 2 and locating column 10, Returnning spring 8 is installed between two spring seats 9, make valve rod 2 remain on meta.

Work control procedure of the present utility model is as follows:

When valve rod 2 is in meta:

Valve block oil suction chamber P1 communicates with valve block oil back chamber P2, and hydraulic oil enters from valve block oil suction chamber P1, and annular recess E1, E2 on valve rod 2 enter valve block oil back chamber P2.

When valve rod 2 is in commutation position:

When valve rod 2 is moved to the left commutation, valve block oil suction chamber P1 and valve block oil back chamber P2 are cut off, hydraulic oil among the valve block oil suction chamber P1 overcomes the pressure of spring 5, open one-way valve and enter into pressure chamber C, and the oilhole F1 on the process valve rod 2 enters into valve rod 2, enter into active chamber A through oil-through hole F2 again, simultaneously, the oilhole F4 of hydraulic oil among the active chamber B on valve rod 2 enters into valve rod 2, enters into valve block oil back chamber P2 through oil-through hole F3 again, is next valve block fuel feeding, if next valve block is in the working position, then with the novel action simultaneously of this reality, realize series connection interlock function, valve body 1 two ends drain charge chamber D is by oil back chamber T drain charge.

When valve rod 2 moves right commutation, valve block oil suction chamber P1 and valve block oil back chamber P2 are cut off, hydraulic oil among the valve block oil suction chamber P1 overcomes the pressure of spring 5, open one-way valve and enter into pressure chamber C, and the oilhole F3 on the process valve rod 2 enters into valve rod 2, enter into active chamber B through oil-through hole F4 again, simultaneously, the oilhole F2 of hydraulic oil among the active chamber A on valve rod 2 enters into valve rod 2, enters among the valve block oil back chamber P2 through oil-through hole F1 again, is next valve block fuel feeding, if next valve block is in the working position, then with the novel action simultaneously of this reality, realize series connection interlock function, valve body 1 two ends drain charge chamber D is by oil back chamber T drain charge.

Claims

1, a kind of Reversing valve plate, it has a valve body, active chamber, pressure chamber, valve block oil suction chamber, valve block oil back chamber, drain charge chamber and oil back chamber are arranged in the valve body, between valve block oil suction chamber and pressure chamber, one-way valve is housed, hollow valve rod is installed in valve body, have on the valve rod with valve body in valve block oil suction chamber, the corresponding annular recess of valve block oil back chamber, it is characterized in that, described valve block oil back chamber is positioned at the both sides of valve block oil suction chamber, corresponding active chamber has two groups of oilholes on valve rod, is also having two groups of oilholes on the valve rod between corresponding valve block oil back chamber and the pressure chamber.