CN219529504U

CN219529504U - High-flow high-stability hydraulic control reversing valve group

Info

Publication number: CN219529504U
Application number: CN202222887798.9U
Authority: CN
Inventors: 赵阳昌
Original assignee: Yuethai Hydraulic Technology Shanghai Co ltd
Current assignee: Yuethai Hydraulic Technology Shanghai Co ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-08-15
Anticipated expiration: 2032-10-31

Abstract

The utility model discloses a high-flow high-stability hydraulic control reversing valve group, which comprises a valve block, wherein four valve cores are arranged in the valve block, and form four two-position three-way reversing valves: the front side of the valve block is provided with four groups of oil inlets and oil outlets, and each two-position three-way reversing valve and the corresponding oil inlet and oil outlet; the valve block is internally provided with a control oil duct, the inner end of each two-position three-way reversing valve is communicated with the control oil duct, after the control oil duct is connected with oil pressure, each valve core axially moves to realize reversing, the left side and the right side of the valve block are respectively provided with a B1 oil port and a B2 oil port, the other oil outlets of the first reversing valve and the second reversing valve are connected to the B1 oil port in parallel, and the other oil outlets of the second reversing valve and the third reversing valve are connected to the B2 oil port in parallel. The two-position three-way reversing valves in the valve group can be switched and connected in parallel to form one-way output, so that the requirements on large flow and large load are met, and the cost is reduced.

Description

High-flow high-stability hydraulic control reversing valve group

Technical Field

The utility model relates to the technical field of hydraulic valve groups, in particular to a high-flow high-stability hydraulic control reversing valve group.

Background

The engineering machinery is a construction machinery for engineering construction and has wide application in the engineering fields of construction, water conservancy, roads, mines and the like. The power source of the construction machine generally includes an electric motor, an internal combustion engine, and a hydraulic pump, wherein a hydraulic system using the hydraulic pump is commonly used in the construction machine to perform a heavy load work. The hydraulic control reversing valve group acting on engineering machinery in the current market is an integrated hydraulic control reversing valve element, and the problems of large valve block volume, high manufacturing cost, small passing flow and unstable reversing exist.

Disclosure of Invention

The utility model aims to provide a high-flow high-stability pilot operated reversing valve group so as to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a high-flow high stability hydraulically controlled reversing valve group, includes the valve piece, installs four case in the valve piece, and the case is reset by spring drive and the spring chamber and the outside intercommunication that the spring is located, and four cases form four two tee bend reversing valves: the front side of the valve block is provided with four groups of oil inlets and oil outlets: a P1 oil port and an A1 oil port; a P2 oil port and an A2 oil port; a P3 oil port and an A3 oil port; a P4 oil port and an A4 oil port, wherein each two-position three-way reversing valve is connected with a corresponding oil inlet and a corresponding oil outlet;

the valve block is internally provided with a control oil duct, the inner end of each two-position three-way reversing valve is communicated with the control oil duct, after the control oil duct is connected with oil pressure, each valve core axially moves to realize reversing, the side face of the valve block is provided with an X oil port, the outer end of the control oil duct is connected to the X oil port, the left side and the right side of the valve block are respectively provided with a B1 oil port and a B2 oil port, the other oil outlets of the first reversing valve and the second reversing valve are connected to the B1 oil port in parallel, and the other oil outlets of the second reversing valve and the third reversing valve are connected to the B2 oil port in parallel.

Preferably, the four two-position three-way reversing valves have the same size and structure, and the four groups of oil inlets and oil outlets have the same size and structure.

Preferably, the valve core is provided with an O-shaped ring groove at the tail part, and an O-shaped ring is arranged in the O-shaped ring groove and used for blocking oil from entering the spring cavity.

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the built-in valve core is pushed to axially move by the pilot pressure to realize reversing, and the spring cavity is communicated with the atmosphere and isolates oil, so that the valve core is not affected in action, and therefore, the reversing stability is good, and the two-position three-way reversing valves in the valve group can be switched and connected in parallel to form one-way output, so that the requirement on large flow and large load is met, the applicability is good, the structure is compact, and the cost is reduced.

Drawings

FIG. 1 is a schematic diagram of a front view of the present utility model;

FIG. 2 is a schematic view of a semi-sectional structure of the present utility model;

fig. 3 is a schematic view of the hydraulic principle of the present utility model.

In the figure: 1. a valve block; 2. a first reversing valve; 3. a second reversing valve; 4. a third reversing valve; 5. a fourth reversing valve; 6. and controlling an oil duct.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-3, the present utility model provides a technical solution: the utility model provides a high-flow high stability hydraulically controlled reversing valve group, includes valve piece 1, install four case in the valve piece 1, the case is reset by spring drive and the spring chamber and the outside intercommunication that the spring is located, and preferably, the case is equipped with O shape circle groove at the afterbody, installs O shape circle in the O shape circle groove, and O shape circle is used for stopping fluid entering spring chamber, avoids influencing hydraulically controlled reversing's stationarity. The four valve cores form four two-position three-way reversing valves, comprising: the front side of the valve block 1 is provided with four groups of oil inlets and oil outlets: a P1 oil port and an A1 oil port; a P2 oil port and an A2 oil port; a P3 oil port and an A3 oil port; the four two-position three-way reversing valves have the same size and structure, and the four groups of oil inlets and oil outlets have the same size and structure.

The valve block 1 is internally provided with a control oil duct 6, each two-position three-way reversing valve is communicated with the control oil duct 6, each valve core axially moves to realize reversing, the side face of the valve block 1 is provided with an X oil port, after the X oil port is connected with pilot oil, the pilot port of each two-position three-way reversing valve has oil pressure, and then the valve core is pushed to move downwards to realize reversing. The outer end of the control oil duct 6 is connected to an X oil port, the left side and the right side of the valve block 1 are respectively provided with a B1 oil port and a B2 oil port, the other oil outlets of the first reversing valve 2 and the second reversing valve 3 are connected to the B1 oil port in parallel, and the other oil outlets of the second reversing valve 3 and the third reversing valve 4 are connected to the B2 oil port in parallel. The oil flows out from the oil ports B1 and B2, is output oil of two reversing valves, and can drive larger load.

Working principle: the valve group is provided with four three-position two-way valves, each three-position two-way valve is independently provided with oil inlet, the axial movement of the oil control valve core of the pilot oil port is changed over, and the three-position two-way valves are switched between independent oil outlet and two-by-two summarized oil outlet, namely, the valve group has two output flow rates with different sizes so as to meet different load demands.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a high-flow high stability hydraulically controlled reversing valve group, includes valve piece (1), its characterized in that: four valve cores are arranged in the valve block (1), the valve cores are driven by springs to reset, a spring cavity where the springs are positioned is communicated with the outside, and the four valve cores form four two-position three-way reversing valves: the novel reversing valve comprises a first reversing valve (2), a second reversing valve (3), a third reversing valve (4) and a fourth reversing valve (5), wherein four groups of oil inlets and oil outlets are formed in the front side of the valve block (1): a P1 oil port and an A1 oil port; a P2 oil port and an A2 oil port; a P3 oil port and an A3 oil port; a P4 oil port and an A4 oil port, wherein each two-position three-way reversing valve is connected with a corresponding oil inlet and a corresponding oil outlet;

the valve block (1) is internally provided with a control oil duct (6), the inner end of each two-position three-way reversing valve is communicated with the control oil duct (6), after the control oil duct (6) is connected with oil pressure, each valve core axially moves to realize reversing, the side face of the valve block (1) is provided with an X oil port, the outer end of the control oil duct (6) is connected to the X oil port, the left side and the right side of the valve block (1) are respectively provided with a B1 oil port and a B2 oil port, the other oil outlets of the first reversing valve (2) and the second reversing valve (3) are connected to the B1 oil port, and the other oil outlets of the second reversing valve (3) and the third reversing valve (4) are connected to the B2 oil port.

2. The high-flow high-stability pilot operated reversing valve set according to claim 1, wherein: the four two-position three-way reversing valves have the same size and structure, and the four groups of oil inlets and oil outlets have the same size and structure.

3. The high-flow high-stability pilot operated reversing valve set according to claim 1, wherein: the valve core is provided with an O-shaped ring groove at the tail part, an O-shaped ring is arranged in the O-shaped ring groove, and the O-shaped ring is used for blocking oil from entering the spring cavity.