CN215257049U

CN215257049U - Bidirectional balance valve

Info

Publication number: CN215257049U
Application number: CN202023286165.XU
Authority: CN
Inventors: 刘德群
Original assignee: Jiangsu Erma Fluid Power Element Co ltd
Current assignee: Jiangsu Erma Fluid Power Element Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-12-21
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a bidirectional balance valve, which comprises a valve body; the method is characterized in that: the inner hole of the valve body is provided with symmetrical stepped holes, two balancing components are symmetrically arranged in the stepped hole in the valve body, and a sliding valve is arranged between the two balancing components; the balance assembly comprises a valve seat, a return spring is sleeved on the valve seat, a valve core is arranged in the valve seat, and one side of the outer end of the valve seat is matched with the valve sleeve; the pressure regulating screw is arranged in the valve sleeve, a locking nut is arranged at the end part of the pressure regulating screw, a spring seat is further arranged on the pressure regulating screw, and a pressure regulating spring is arranged on the spring seat in a matched mode. The utility model has the advantages that the utility model has simple structure and good stability; the bidirectional balance valve can simultaneously control two single-acting cylinders or one double-acting cylinder, realizes the functions of the two single-acting balance valves, brings convenience to the arrangement of hydraulic system components and pipeline connection, and can save certain cost.

Description

Bidirectional balance valve

Technical Field

The utility model relates to a field of balanced valve especially relates to a two-way balanced valve.

Background

The conventional hoisting machinery in China such as a truck crane uses a single balance valve, and as shown in fig. 4, the single balance valve mainly comprises a valve body, a plug, a damping screw, a wear-resistant ring, a valve core, a gasket, a return spring, a valve seat, a wear-resistant ring, a pressure regulating spring, a spring seat, a valve sleeve, a locking nut, a pressure regulating screw, an O-shaped sealing ring and the like. When the V2 is in a high-pressure state, high-pressure oil pushes the valve seat 8 open to enter the oil cylinder through the C2 to lift a load, the V2 is disconnected, the oil cylinder is in a load holding state, when the V2 is in a low pressure state, the high-pressure oil at the control port V1 pushes the valve core to move leftwards, the C2 is communicated with the V2, the high-pressure oil of the oil cylinder is discharged, and the load is lowered. The hydraulic principle is shown in fig. 5. In the working process, the single balance valve can only control one single-acting cylinder, the single-acting cylinder refers to that hydraulic power is needed during lifting, external force is not needed during descending, and only the reverse pressure provided by a load is needed. In some engineering machines such as a land scraper, a plurality of cylinders are required to be controlled, a plurality of single balance valves are required, and the use cost is high.

Disclosure of Invention

The utility model aims at providing a two-way balance valve, which has simple structure and good use effect, one two-way balance valve can replace two single balance valves, thereby bringing convenience to the arrangement of hydraulic system components and the pipeline connection, and simultaneously saving certain cost; the technical problem is solved.

In order to realize the technical purpose, reach foretell technical requirement, the utility model discloses the technical scheme who adopts is: a bidirectional balanced valve includes a valve body; the method is characterized in that: the inner hole of the valve body is provided with symmetrical stepped holes, two balancing components are symmetrically arranged in the stepped hole in the valve body, and a sliding valve is arranged between the two balancing components; the balance assembly comprises a valve seat, a return spring is sleeved on the valve seat, a valve core is arranged in the valve seat, and one side of the outer end of the valve seat is matched with the valve sleeve; the pressure regulating screw is arranged in the valve sleeve, a locking nut is arranged at the end part of the pressure regulating screw, a spring seat is further arranged on the pressure regulating screw, and a pressure regulating spring is arranged on the spring seat in a matched mode.

Preferably: the valve core is of a hollow structure.

Preferably: and one end of the valve core close to the slide valve is provided with a wear-resisting ring a.

Preferably: and a wear-resisting ring b is arranged between the spring seat and the valve body.

Preferably: and the connecting ports on the valve body are symmetrically arranged.

The utility model has the advantages that; a bi-directional balancing valve, compared to conventional structures: two identical balance valve assemblies are symmetrically arranged in the valve body from left to right, and a slide valve is arranged between the two balance valve assemblies; the valve core of the double-balanced valve is of a hollow structure, so that high-pressure oil at a V1 port enters a C1 port, namely a large cavity of an oil cylinder, and simultaneously pushes a slide valve to open the valve core at the other end through the hole, so that oil in a small cavity of the oil cylinder returns to an oil tank to play a dual role of a control port, and the V1 port and the V2 port are mutually switched between high pressure and low pressure by a system multi-way control valve, so that the double-balanced valve can simultaneously control two single-acting cylinders or one double-acting cylinder, and the functions of the two single-balanced valves are realized. The utility model has simple structure and good stability; the hydraulic system component arrangement and pipeline connection are convenient, and meanwhile certain cost can be saved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a hydraulic schematic diagram of the present invention;

FIG. 3 is a schematic structural diagram of the balance valve assembly of the present invention;

FIG. 4 is a schematic diagram of a prior art structure;

FIG. 5 is a prior art hydraulic schematic;

in the figure: 1. a valve body; 2. a spool valve; 3. a wear-resistant ring a; 4. a valve core; 5. a pressure regulating screw; 6. a return spring; 7. a valve seat; 8. a wear ring; 9. a pressure regulating spring; 10. a spring seat; 11. a valve housing; 12. and locking the nut.

Detailed Description

In order to make the object, technical solution and beneficial technical effects of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments;

in the drawings: a bidirectional balanced valve includes a valve body; the inner hole of the valve body 1 is symmetrically provided with stepped holes, two balance assemblies are symmetrically arranged in the stepped holes in the valve body 1, and a slide valve 2 is arranged between the two balance assemblies; the balance assembly comprises a valve seat 7, a return spring 6 is sleeved on the valve seat 7, a valve core 4 is arranged in the valve seat 7, and one side of the outer end of the valve seat 7 is matched with a valve sleeve 11; the pressure regulating valve is characterized in that a pressure regulating screw 13 is arranged in the valve sleeve 11, a locking nut 12 is arranged at the end part of the pressure regulating screw 13, a spring seat 10 is further arranged on the pressure regulating screw 5, and a pressure regulating spring 9 is arranged on the spring seat 10 in a matched mode.

Specifically, the valve core 4 is of a hollow structure; when entering a C1 port, namely a large oil cylinder cavity, high-pressure oil at a V1 port pushes a slide valve to open a valve core at the other end through the hole, so that oil in the small oil cylinder cavity returns to an oil tank to play a dual role of a control port; one end of the valve core 4 close to the slide valve is provided with a wear-resisting ring a 3; a wear-resisting ring b8 is arranged between the spring seat 10 and the valve body 1; and the connecting ports on the valve body 1 are symmetrically arranged.

The utility model discloses a concrete implementation: the bidirectional balance valve is installed in a hydraulic system of a land leveler and is matched with a double-acting oil cylinder for use, the hydraulic principle is shown in figure 2, a port C1 and a port C2 are respectively connected with a large cavity and a small cavity of the oil cylinder, a port V1 and a port V2 are connected with a system pipeline, a port V2 is connected with return oil when the port V1 is high in pressure, a port V1 is connected with return oil when the port V2 is high in pressure, and the switching is carried out by a multi-way reversing valve of the system. When the V1 port high pressure oil pushes the valve seat 7 open and enters the big cavity of the oil cylinder, the slide valve 2 is pushed through the through hole of the valve core to open the valve core at the other end, the small cavity hydraulic oil returns to the oil tank, otherwise, the big cavity hydraulic oil returns to the oil tank, the reciprocating circulation can make the piston rod of the oil cylinder move left and right or up and down to execute the required action, when the V1 port and the V2 port are cut off simultaneously, the oil cylinder can be locked, and the load can be kept in a stable state. The two-way balance valve performs linkage control on the large cavity and the small cavity of the oil cylinder, so that oil inlet and oil return of the large cavity and the small cavity of the oil cylinder are always in a balanced state, and an executing element borne by the oil cylinder can run stably. The V1 port and the V2 port are switched between high pressure and low pressure by a system multi-way control valve, so that the bidirectional balance valve can simultaneously control two single-acting cylinders or a double-acting cylinder to realize the functions of the two single-acting balance valves.

The foregoing examples are given for the purpose of illustrating the present invention in a clear and non-restrictive manner, and it will be apparent to those skilled in the art that variations and modifications of the present invention may be made in other variations and modifications based on the foregoing description, and it is not necessary or necessary to exhaustively enumerate all embodiments, and all such variations and modifications as are obvious and desirable in the art are within the scope of the present invention.

Claims

1. A bidirectional balanced valve includes a valve body; the method is characterized in that: the inner hole of the valve body (1) is provided with symmetrical stepped holes, two balance assemblies are symmetrically arranged in the stepped hole in the valve body (1), and a sliding valve (2) is arranged between the two balance assemblies; the balance assembly comprises a valve seat (7), a return spring (6) is sleeved on the valve seat (7), a valve core (4) is arranged in the valve seat (7), and one side of the outer end of the valve seat (7) is matched with a valve sleeve (11); the pressure regulating valve is characterized in that a pressure regulating screw (5) is arranged in the valve sleeve (11), a locking nut (12) is arranged at the end part of the pressure regulating screw (5), a spring seat (10) is further arranged on the pressure regulating screw (5), and a pressure regulating spring (9) is arranged on the spring seat (10) in a matched mode.

2. A bi-directional balanced valve according to claim 1, characterized in that: the valve core (4) is of a hollow structure.

3. A bi-directional balanced valve according to claim 1, characterized in that: and one end of the valve core (4) close to the slide valve is provided with a wear-resistant ring a (3).

4. A bi-directional balanced valve according to claim 1, characterized in that: and a wear-resistant ring b (8) is arranged between the spring seat (10) and the valve body (1).

5. A bi-directional balanced valve according to claim 1, characterized in that: the connecting ports on the valve body (1) are symmetrically arranged.