CN214465209U

CN214465209U - Novel balance valve

Info

Publication number: CN214465209U
Application number: CN202023303405.2U
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: 2021-10-22
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a novel balance valve, which comprises a valve sleeve, a valve core arranged in the valve sleeve and a valve body matched with the valve sleeve; it is characterized in that the valve core is provided with a slide valve in a matching way, and a return spring is arranged between the slide valve and the valve core; the inner hole of the valve body is a through stepped hole, a pressure regulating screw rod is arranged in the valve body, a pressure regulating spring is arranged on the pressure regulating screw rod, and a pressure regulating nut is arranged at the right end of the pressure regulating screw rod; a locking nut is arranged at the right end of the valve body, and a sealing ring a is arranged between the locking nut and the pressure regulating nut; the crane has the advantages of compact structure and good stability, improves the accuracy and the stability of load reduction, and is suitable for cranes with high control precision requirements.

Description

Novel balance valve

Technical Field

The utility model relates to a field of balanced valve especially relates to a play forward oil, reverse oil seal and keep the effect of load to have the novel balanced valve of high pressure overflow function concurrently.

Background

The balance valve is mainly used in a hydraulic system of an engineering machinery crane and is matched with an execution element (such as an oil cylinder) for use, a hydraulic control one-way valve is a common hydraulic element matched with the oil cylinder at home at present, and as shown in the figure III, the balance valve mainly comprises a valve body, a polytetrafluoroethylene check ring, a piston, a wear-resisting ring, a polytetrafluoroethylene check ring, a return spring, a nut, a gasket, a return spring, a valve core, a polytetrafluoroethylene check ring, a valve sleeve, an O-shaped sealing ring and the like. The basic working principle is as follows: pressurizing the port B, opening the valve core and allowing high-pressure oil to enter the oil cylinder through the port A; the pressure of the port B is discharged, and when high-pressure oil acts on the port A, the valve core and the valve sleeve are closed to keep the load. If the high pressure of the port A needs to be discharged, the control port is pressurized to push the valve core leftwards, and the high-pressure oil flows to the port B from the port A. Because the hydraulic pressure (the return spring force is small) is mainly overcome by the control port push-open valve core, the control is difficult to accurately control, the accuracy and the stability of load reduction are relatively poor, and the control method is generally suitable for occasions with low control precision requirements and is not suitable for cranes with high control precision requirements.

Disclosure of Invention

The utility model aims at providing a novel balanced valve, compact structure, reasonable in design has improved control accuracy, has solved above technical problem.

In order to realize the technical purpose, reach foretell technical requirement, the utility model discloses the technical scheme who adopts is: a novel balance valve comprises a valve sleeve, a valve core arranged in the valve sleeve and a valve body matched with the valve sleeve; the method is characterized in that: a slide valve is arranged on the valve core in a matching way, and a return spring is arranged between the slide valve and the valve core; the inner hole of the valve body is a through stepped hole, a pressure regulating screw rod is arranged in the valve body, a pressure regulating spring is arranged on the pressure regulating screw rod, and a pressure regulating nut is arranged at the right end of the pressure regulating screw rod; the right end of the valve body is provided with a locking nut, and a sealing ring a is arranged between the locking nut and the pressure regulating nut.

Preferably: and a sealing ring b is arranged between the valve sleeve and the slide valve.

Preferably: the return spring is arranged on the spring seat, and the spring seat is arranged at the right end of the valve core.

Preferably: and a shaft check ring is arranged on the right side of the spring seat.

Preferably: and a clamp spring is arranged on the pressure regulating screw rod.

Preferably: and a steel wire check ring is arranged between the valve sleeve and the valve body, and a polytetrafluoroethylene check ring and a sealing ring c are arranged on the outer surface of the valve body at intervals.

Preferably: the surface of the left end of the valve core, which is matched with the slide valve, is a conical surface.

The utility model has the advantages that; a balanced valve, compared to a conventional structure: a slide valve is arranged on the valve core in a matching way, and a return spring is arranged between the slide valve and the valve core; a pressure regulating screw rod is arranged in the valve body, a pressure regulating spring is arranged on the pressure regulating screw rod, and a locking nut is arranged at the right end of the valve body; when high-pressure oil needs to return to the port B from the port A, under the action of the control port C, the valve core and the slide valve move rightwards together, the valve core stops after moving for a small distance, the slide valve continuously moves to be opened by overcoming the pressure regulating spring force, and unloading or overflowing is realized. To open the spool, the pressure at the control port C of the balancing valve overcomes the spring force of the pressure regulating spring, rather than the hydraulic force. The higher the pressure at port a of the balancing valve, the lower the pressure at port C needed to open the spool valve, because they together overcome the spring force; because the control port C overcomes the spring force, the control accuracy and stability are better. The utility model discloses compact structure, stability is good, has improved the accuracy nature and the stationarity that the load descends, is applicable to the very high hoist of control accuracy requirement.

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 prior art schematic;

FIG. 4 is a prior art hydraulic schematic;

in the figure: 1. a valve housing; 2. a sealing ring a; 3. a valve core; 4. a spool valve; 5. a steel wire retainer ring; 6. a return spring; 7. a spring seat; 8. a polytetrafluoroethylene retainer ring; 9. a valve body; 10. a retainer ring for a shaft; 11. a seal ring c; 12. a pressure regulating spring; 13. a clamp spring; 14. a pressure regulating nut; 15. a pressure regulating screw rod; 16. a pressure-resistant nut; 17. and a sealing ring b.

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 novel balance valve comprises a valve sleeve 1, a valve core 3 arranged in the valve sleeve 1, and a valve body 9 matched with the valve sleeve 1; a slide valve 4 is arranged on the valve core 3 in a matching way, and a return spring 6 is arranged between the slide valve 4 and the valve core 3; an inner hole of the valve body 9 is a through stepped hole, a pressure regulating screw rod 15 is arranged inside the valve body 9, a pressure regulating spring 12 is arranged on the pressure regulating screw rod 15, and a pressure regulating nut 14 is arranged at the right end of the pressure regulating screw rod 15; the right end of the valve body 9 is provided with a locking nut 16, and a sealing ring a17 is arranged between the locking nut 16 and the pressure regulating nut 14.

Specifically, a sealing ring b18 is arranged between the valve sleeve 1 and the slide valve 4; the return spring 6 is arranged on a spring seat 7, and the spring seat 7 is arranged at the right end of the valve core 3; a shaft retainer ring 10 is arranged on the right side of the spring seat 7; the pressure regulating screw rod 15 is provided with a clamp spring 13; a steel wire check ring 5 is arranged between the valve sleeve 1 and the valve body 9, and polytetrafluoroethylene check rings 8 and a sealing ring c11 are arranged on the outer surface of the valve body 9 at intervals; the surface of the left end of the valve core 3 matched with the slide valve 4 is a conical surface.

The utility model discloses a concrete implementation: the balance valve is arranged in a hydraulic system of a crane and is matched with an execution element (such as an oil cylinder) for use, when the balance valve works normally, a port B is pressurized, a valve core 3 is opened, and hydraulic oil enters the oil cylinder through a port A; when the pressure of the port B is discharged and high-pressure oil reversely acts on the port A, the valve core 3 and the slide valve 4 are closed, and the machining precision, namely the roundness can reach 0.003 mm because the conical surface is sealed, so that no leakage exists, and the oil cylinder is locked to prevent the oil cylinder from sliding; when the port A, namely hydraulic oil in the oil cylinder, needs to be drained, the control port C is pressurized, the valve core 3 and the slide valve 4 move rightwards together by overcoming the elastic force of the pressure regulating spring 12, after the valve core 3 moves for a small distance, the slide valve 4 continues to move and open, and high-pressure oil at the port A is drained. The level of the pressure at the control port C determines the degree of opening of the spool 4 and also determines the speed at which the load drops. Because the control port C overcomes the spring force instead of the hydraulic pressure, the spring force is in direct proportion to the compression amount thereof and follows Hooke's law, the opening of the slide valve 4 is easy to accurately control, and the operation accuracy and stability are better when the load of the crane is reduced.

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 novel balance valve comprises a valve sleeve (1), a valve core (3) arranged in the valve sleeve (1), and a valve body (9) matched with the valve sleeve (1); the method is characterized in that: a slide valve (4) is arranged on the valve core (3) in a matching way, and a return spring (6) is arranged between the slide valve (4) and the valve core (3); an inner hole of the valve body (9) is a through stepped hole, a pressure regulating screw rod (15) is arranged in the valve body (9), a pressure regulating spring (12) is arranged on the pressure regulating screw rod (15), and a pressure regulating nut (14) is arranged at the right end of the pressure regulating screw rod (15); the right end of the valve body (9) is provided with a locking nut (16), and a sealing ring a (17) is arranged between the locking nut (16) and the pressure regulating nut (14).

2. A novel balanced valve according to claim 1, characterized in that: and a sealing ring b (18) is arranged between the valve sleeve (1) and the sliding valve (4).

3. A novel balanced valve according to claim 1, characterized in that: the return spring (6) is arranged on the spring seat (7), and the spring seat (7) is arranged at the right end of the valve core (3).

4. A novel balanced valve according to claim 3, characterized in that: and a shaft retainer ring (10) is arranged on the right side of the spring seat (7).

5. A novel balanced valve according to claim 1, characterized in that: and a clamp spring (13) is arranged on the pressure regulating screw rod (15).

6. A novel balanced valve according to claim 1, characterized in that: a steel wire check ring (5) is arranged between the valve sleeve (1) and the valve body (9), and a polytetrafluoroethylene check ring (8) and a sealing ring c (11) are arranged on the outer surface of the valve body (9) at intervals.

7. A novel balanced valve according to claim 1, characterized in that: the surface of the left end of the valve core (3) matched with the sliding valve (4) is a conical surface.