CN220118414U

CN220118414U - Plug-in high-pressure overflow valve

Info

Publication number: CN220118414U
Application number: CN202320999346.1U
Authority: CN
Inventors: 钟静
Original assignee: Yuethai Hydraulic Technology Shanghai Co ltd
Current assignee: Yuethai Hydraulic Technology Shanghai Co ltd
Priority date: 2023-04-27
Filing date: 2023-04-27
Publication date: 2023-12-01
Anticipated expiration: 2033-04-27

Abstract

The utility model discloses a plug-in type high-pressure overflow valve, which comprises a valve sleeve and a spring, wherein an inner cavity of the valve sleeve is slidably connected with a conical valve core and a spring seat, the spring is arranged between the conical valve core and the spring seat, the front end of the conical valve core is provided with a conical tip, the front end of the valve sleeve is fixedly connected with a baffle, the middle part of the baffle is provided with a first valve hole, the front end of the first valve hole is provided with a throttling hole with a smaller diameter, the front end of the conical tip is inserted into the first valve hole to realize plugging, the side surface of the front end of the valve sleeve is provided with a radially penetrating second valve hole, and the conical valve core can synchronously adjust the opening of the first valve hole and the second valve hole in an up-down moving manner. Oil enters through the throttle hole in front of the first valve hole, when oil pressure can jack up the cone valve core, overflow unloading can be carried out through the second valve hole, the throttle hole is arranged in front of the first valve hole, high-speed high-pressure oil can be decelerated and decompressed through the throttle hole before reaching the first valve hole, and the problems of pressure stability and howling can be improved.

Description

Plug-in high-pressure overflow valve

Technical Field

The utility model relates to the technical field of hydraulic valves, in particular to a plug-in type high-pressure overflow valve.

Background

The overflow valve is a pressure control valve used for limiting the highest working pressure of a system and playing a role in safety protection, and the common plug-in type overflow valve is generally mainly composed of a valve sleeve, a valve core, a valve seat, a pressure regulating spring, an adjusting screw rod and the like, and the valve core of the high-pressure overflow valve is usually in a conical valve core structure. When the system pressure exceeds the set pressure of the overflow valve, the valve core opens overflow to prevent the system pressure from further rising, and the existing plug-in type overflow valve has the problems of pressure stability and squeal noise.

Disclosure of Invention

The utility model aims to provide a plug-in type high-pressure overflow valve so as to solve the problems in the background art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a cartridge formula high pressure overflow valve, includes valve pocket and spring, the inner chamber sliding connection of valve pocket has awl case and spring holder, the spring sets up between awl case and spring holder, and the front end of awl case is equipped with the awl point, the front end fixedly connected with baffle of valve pocket, the middle part of baffle is equipped with first valve opening, and the front end of first valve opening is equipped with the orifice that the diameter diminishes, and the front end of awl point inserts first valve opening and realizes the shutoff, the front end side of valve pocket is equipped with radial second valve opening that runs through, and the awl case reciprocates and can synchronous adjustment first valve opening, the aperture of second valve opening.

Preferably, the tail part of the valve sleeve is fixedly provided with a locking nut, an adjusting screw is connected in the locking nut in a threaded manner, and the front end of the adjusting screw abuts against the spring seat.

Preferably, the outside of spring holder is equipped with the annular, and the joint has O type sealing washer in the annular, and the clearance between O type sealing washer sealed spring holder and the valve pocket.

Compared with the prior art, the utility model has the beneficial effects that: oil enters through the throttle hole in front of the first valve hole, when oil pressure can jack up the cone valve core, overflow unloading can be carried out through the second valve hole, the throttle hole is arranged in front of the first valve hole, high-speed high-pressure oil can be decelerated and decompressed through the throttle hole before reaching the first valve hole, and the problems of pressure stability and howling can be improved.

Drawings

FIG. 1 is a schematic cross-sectional view of the present utility model;

fig. 2 is a schematic diagram of a front view structure of the present utility model.

In the figure: 1. a valve sleeve; 2. a spring seat; 3. a spring; 4. a cone valve core; 5. adjusting a screw; 6. a lock nut; 7. a second valve hole; 8. a first valve hole; 9. conical tip.

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. 1-2, the present utility model provides a technical solution: the utility model provides a cartridge formula high pressure overflow valve, including valve pocket 1 and spring 3, the inner chamber sliding connection of valve pocket 1 has cone valve core 4 and spring holder 2, spring 3 sets up between cone valve core 4 and spring holder 2, cone valve core 4's front end is equipped with awl point 9, valve pocket 1's front end fixedly connected with baffle, the mode of the encapsulation of baffle adoption punching press, the middle part of baffle is equipped with first valve opening 8, first valve opening 8 is as the inlet opening of fluid, the front end of first valve opening 8 is equipped with the orifice that the diameter diminishes, the orifice can play buffering restriction steady voltage's effect, the front end of awl point 9 inserts first valve opening 8 and realizes the shutoff, when exceeding spring 3's pressure through the pressure of first valve opening 8 feed liquor, can upwards jack-up cone valve core 4 realizes the overflow, valve core 1's front end side is equipped with radial throughout second valve opening 7, cone valve core 4 reciprocates the aperture that can synchronous adjustment first valve opening 8, the aperture of second valve opening 7, the pressure of switch-on is big, the ascending stroke of cone valve core 4 just increases the aperture.

The afterbody fixed mounting who valve pocket 1 has lock nut 6, and the spiro union has adjusting screw 5 in the lock nut 6, and the front end of adjusting screw 5 supports on spring holder 2, and the upper end of adjusting screw 5 is equipped with the hexagonal groove that is used for twisting, rotates adjusting screw 5 and can adjust the position of spring holder 2, and then adjusts the compression degree of spring 3, adjusts the cracking pressure of this overflow valve, and the outside of spring holder 2 is equipped with the annular, and the joint has O type sealing washer in the annular, and the clearance between O type sealing washer sealing spring holder 2 and valve pocket 1.

Working principle: when the overflow valve is used, oil enters through the throttle hole in front of the first valve hole 8, and when oil pressure can jack up the cone valve core 4, overflow unloading can be carried out through the second valve hole 7. Under the condition that the overflow amount is too large and the overflow speed is too high, pressure fluctuation and squeal are easy to generate at the valve port position, a small-size orifice is arranged in front of the first valve hole 8, high-speed high-pressure oil can be decelerated and decompressed through the orifice before reaching the first valve hole 8, and the effects of improving the pressure stability and squeal problem of the overflow valve are remarkable.

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 cartridge formula high pressure relief valve, includes valve pocket (1) and spring (3), its characterized in that: the inner cavity sliding connection of valve pocket (1) has awl case (4) and spring holder (2), spring (3) set up between awl case (4) and spring holder (2), and the front end of awl case (4) is equipped with awl point (9), the front end fixedly connected with baffle of valve pocket (1), the middle part of baffle is equipped with first valve opening (8), and the front end of first valve opening (8) is equipped with the orifice that the diameter diminishes, and the front end of awl point (9) inserts first valve opening (8) and realizes the shutoff, the front end side of valve pocket (1) is equipped with radial second valve opening (7) that run through, and the aperture of first valve opening (8), second valve opening (7) can be adjusted in step to the upper and lower motion of awl case (4).

2. The cartridge high pressure relief valve of claim 1, wherein: the tail of the valve sleeve (1) is fixedly provided with a lock nut (6), an adjusting screw (5) is connected in the lock nut (6) in a threaded manner, and the front end of the adjusting screw (5) is propped against the spring seat (2).

3. A cartridge high pressure relief valve as claimed in claim 2, wherein: the outside of spring holder (2) is equipped with the annular, and the joint has O type sealing washer in the annular, and the clearance between O type sealing washer sealed spring holder (2) and valve pocket (1).