CN215058547U

CN215058547U - Hydraulic pressure controlled pressure reducing overflow valve

Info

Publication number: CN215058547U
Application number: CN202120887019.8U
Authority: CN
Inventors: 王全东; 刘江
Original assignee: Tianjin Haifu Hydraulic Technology Co ltd
Current assignee: Tianjin Haifu Hydraulic Technology Co ltd
Priority date: 2021-04-27
Filing date: 2021-04-27
Publication date: 2021-12-07
Anticipated expiration: 2031-04-27

Abstract

The utility model discloses a pressure reducing overflow valve controlled by hydraulic pressure, a spring, a valve rod, a valve core and a plug are sequentially assembled inside a valve hole from left to right, the position of the spring is communicated with an oil drainage port, the tail part of the valve rod is inserted in the spring, the head part is provided with a valve rod spherical surface which is matched with a valve core conical surface of the valve core to form a circular seal, a through hole is arranged inside the valve core, the surface of the valve core is provided with an oil inlet and an oil passing hole, the oil inlet is communicated with an oil inlet, three pressure equalizing grooves are arranged on the periphery of the valve core in parallel, the valve core is directly contacted with the plug, the plug external thread is matched and locked with the internal thread of the valve hole and exerts corresponding torsion, the surface of the plug is provided with an oil outlet, the oil outlet is communicated with the oil outlet through the through hole inside the valve core, the oil outlet is communicated with the oil outlet, an O-shaped ring is assembled on the periphery of the plug, a hexagonal groove in the valve seat is arranged on the outer end surface of the plug, the structure of the utility model is simple, the structure has the advantages of compactness, small volume, space saving, few parts, convenience in installation and contribution to reducing the replacement cost of the parts.

Description

Hydraulic pressure controlled pressure reducing overflow valve

Technical Field

The utility model relates to an overflow valve technical field especially relates to a hydraulic control's decompression overflow valve.

Background

The pressure reducing overflow valve is a pressure control valve which controls the opening degree of a valve core in a valve hole to adjust the flow of hydraulic oil, reduces the pressure of the hydraulic oil, and simultaneously overflows redundant flow through an opening between valve rods of the valve core to balance the pressure fluctuation behind the valve with the spring force, so that the pressure of a valve port is kept in a certain range.

The existing pressure reducing valves are generally divided into two types, one type is a superposed pressure reducing valve, and the pressure reducing valve is in plate connection, so that the structure is simple, parts are few, but the valve body is large in size, inconvenient to install and high in requirement on an installation surface; the other type is a cartridge type pressure reducing valve, and the pressure reducing valve is generally installed through threads and inserted into matched cartridge holes, so that the valve body is small in size and convenient to install, but the valve is complex in structure, high in precision requirement on the valve body and multiple in parts. Therefore, it is urgently needed to develop a hydraulic pressure control pressure reducing relief valve to solve the technical problems.

In view of this, the present invention is especially provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a hydraulic control's decompression overflow valve, simple structure, it is compact, small, practice thrift the space, spare part is few, simple to operate, and be favorable to reducing the replacement cost of spare part, have wide application prospect, have beneficial use and popularize and apply.

In order to achieve the purpose, the utility model provides a relief overflow valve controlled by hydraulic pressure, which comprises a valve body, one end of the valve body is provided with a valve hole, the periphery of the valve hole is provided with an oil inlet, an oil outlet and an oil drainage port in a direction perpendicular to the valve hole, the inside of the valve hole is sequentially provided with a spring, a valve rod, a valve core and a plug from left to right, the position of the spring is communicated with the oil drainage port, the tail part of the valve rod is inserted in the spring, the head part of the valve rod is provided with a valve rod spherical surface which is matched with a valve core conical surface of the valve core to form a circular seal, the inside of the valve core is provided with a through hole, the surface of the valve core is provided with an oil inlet hole and an oil passing hole, the oil inlet hole is communicated with the oil inlet, three pressure equalizing grooves are arranged on the periphery of the valve core in parallel, the valve core is directly contacted with the plug, the plug external thread is matched and locked with the inner thread of the valve hole to play corresponding torsion, the oil outlet is communicated with the oil inlet through a through hole in the valve core, the oil outlet is communicated with the oil outlet, an O-shaped ring is assembled on the periphery of the plug, and a hexagonal groove in the valve seat is formed in the outer end face of the plug.

Preferably, a pressure equalizing groove is arranged between the oil passing hole and the oil inlet hole, and two pressure equalizing grooves are arranged on the right side of the oil inlet hole.

Preferably, the three pressure equalizing grooves are the same in shape and size.

Preferably, the center of the spherical surface of the valve rod is a plane, and the periphery of the spherical surface of the valve rod is a curved surface.

Preferably, the oil passing hole is trumpet-shaped, the outer end of the oil passing hole is conical, and the inner part of the oil passing hole is cylindrical.

The utility model provides a pair of hydraulic control's decompression overflow valve has following beneficial effect.

The utility model discloses by the valve body, the spring, the valve rod, the case, O type circle and plug directly assemble and form, simple structure, the compactness, small practices thrift the space, spare part is few, simple to operate, and is favorable to reducing the replacement cost of spare part, has wide application prospect, has favourable application and popularization and application.

Drawings

Fig. 1 is a cross-sectional view of a hydraulic pressure controlled relief valve provided by the present invention;

fig. 2 is an exploded schematic view of an internal component of a valve hole of a hydraulic pressure-controlled pressure-reducing overflow valve provided by the present invention;

fig. 3 is an exploded structural sectional view of the valve hole internal component of a hydraulic pressure control pressure relief valve provided by the present invention;

fig. 4 is a schematic view of a valve rod structure of a hydraulic pressure controlled relief valve provided by the present invention;

fig. 5 is a schematic view of a valve core structure of a hydraulic pressure controlled relief valve provided by the present invention;

fig. 6 is the utility model provides a plug structure sketch map of hydraulic control's decompression overflow valve.

In the figure:

1. the valve hole 2, the spring 3, the valve rod 4, the valve core 5, the plug 6, the O-shaped ring 7, the oil inlet 8, the oil outlet 9, the oil drain port 10, the oil inlet hole 11, the oil outlet hole 12, the oil passing hole 13, the pressure equalizing groove 14, the valve rod spherical surface 15, the valve core conical surface 16 and the hexagonal groove in the valve seat.

Detailed Description

The present invention will be further described with reference to the following specific embodiments and accompanying drawings to facilitate understanding of the present invention.

As shown in fig. 1-3, it is respectively the cross-sectional view of the pressure-reducing overflow valve for hydraulic control, the exploded structure schematic diagram and the exploded structure cross-sectional view of the internal components of the valve hole provided by the present invention. This hydraulic control's decompression overflow valve includes the valve body, valve opening 1 has been seted up to the one end of valve body, oil inlet 7, oil-out 8 and draining port 9 have been seted up to perpendicular to 1 direction of valve opening around the

valve opening

1, 1 inside from left to right side of valve opening has been assembled spring 2 in proper order, valve rod 3, case 4 and plug 5, spring 2's position and draining port 9 are linked together.

As shown in fig. 4-6, it is respectively the schematic structural diagrams of the valve rod, the valve core and the plug of the pressure-reducing overflow valve controlled by hydraulic pressure provided by the present invention. The tail part of the valve rod 3 is inserted into the spring 2, the head part of the valve rod 3 is provided with a valve rod spherical surface 14, the center of the valve rod spherical surface 14 is a plane, the periphery of the valve rod spherical surface is a curved surface, and the valve rod spherical surface and a valve core conical surface 15 of the valve core 4 are matched to form a circular seal so as to prevent pressure oil from leaking under a pressure stabilizing condition. The oil filter is characterized in that a through hole is formed in the valve core 4, an oil inlet 10 and an oil passing hole 12 are formed in the surface of the valve core 4, the oil inlet 10 is communicated with the oil inlet 7, the oil passing hole 12 is horn-shaped, the outer end of the oil passing hole is conical, and the inner portion of the oil passing hole is cylindrical. The diameter of the cylinder is small, which is equivalent to the built-in damping. Three pressure equalizing grooves 13 are arranged on the periphery of the valve core 4 in parallel and used for equalizing pressure when the valve core 4 works and keeping the valve core 4 vertical and free from clamping stagnation. Preferably, a pressure equalizing groove 13 is arranged between the oil passing hole 12 and the oil inlet hole 10, two pressure equalizing grooves 13 are arranged on the right side of the oil inlet hole 10, and the three pressure equalizing grooves 13 have the same shape and size. The valve core 4 is directly contacted with the plug 5, the external thread of the plug 5 is matched and locked with the internal thread of the valve hole 1, and corresponding torsion is applied to ensure that components in the valve hole 1 cannot be popped up. The utility model discloses a convenient oil leakage prevention plug, including plug 5, oil outlet 11, oil inlet 10, oil outlet 11, oil outlet 8, be equipped with O type circle 6 on plug 5's the periphery for sealed oil leak that prevents, be equipped with disk seat hexagon socket head cap groove 16 on plug 5's the outer terminal surface, the installation of convenient use hexagon socket head cap spanner is dismantled.

The utility model discloses a theory of operation does:

the utility model discloses highly compressed pressure oil of during operation gets into from oil inlet 7 of valve opening 1, through-hole in the inlet port 10 entering case 4 of case 4, pressure oil passes through oil outlet 11 and delivers to oil-out 8 after spring 2's elastic action, and unnecessary pressure oil is through promoting valve rod 3 compression spring 2 simultaneously, makes valve rod 3 open with case 4's contact surface, flows out through draining port 9, leaks the draining return circuit of system. When the system pressure rises, the oil liquid exceeding the decompression pressure flows out through the oil drainage port 9, so that the pressure is within a certain range after decompression. When the pressure is stable, the contact surface of the valve rod 3 and the valve core 4 is closed, and the pressure reduction overflow valve works stably.

The utility model discloses by the valve body, spring 2, valve rod 3, case 4,

O type circle

6 and 5 direct assembly of plug screw form, simple structure, the compactness, small practices thrift the space, and spare part is few, simple to operate, and be favorable to reducing the replacement cost of spare part, has wide application prospect, has beneficial use and popularizes and applies.

The present invention has been described in detail with reference to specific embodiments, and the description of the embodiments is only for the purpose of helping understanding the core idea of the present invention. It should be understood that any obvious modifications, equivalents and other improvements made by those skilled in the art without departing from the spirit of the present invention are intended to be included within the scope of the present invention.

Claims

1. A pressure reduction overflow valve controlled by hydraulic pressure is characterized by comprising a valve body, wherein one end of the valve body is provided with a valve hole, an oil inlet, an oil outlet and an oil drainage port are formed in the periphery of the valve hole and perpendicular to the direction of the valve hole, a spring, a valve rod, a valve core and a plug are sequentially assembled in the valve hole from left to right, the position of the spring is communicated with the oil drainage port, the tail of the valve rod is inserted in the spring, the head of the valve rod is provided with a valve rod spherical surface which is matched with a valve core conical surface of the valve core to form a circular seal, a through hole is formed in the valve core, the surface of the valve core is provided with an oil inlet and an oil passing hole, three pressure equalizing grooves are arranged in parallel on the periphery of the valve core, the valve core is in direct contact with the plug, the external thread of the plug is matched and locked with the internal thread of the valve hole to apply corresponding torsion, and the surface of the plug is provided with an oil outlet, the oil outlet is communicated with the oil inlet through a through hole in the valve core, the oil outlet is communicated with the oil outlet, an O-shaped ring is assembled on the periphery of the plug, and a hexagonal groove in the valve seat is formed in the outer end face of the plug.

2. The pressure-controlled relief and overflow valve according to claim 1, wherein one pressure-equalizing groove is provided between said oil passing hole and said oil inlet hole, and two pressure-equalizing grooves are provided on the right side of said oil inlet hole.

3. The hydraulically controlled pressure reducing and overflowing valve of claim 2, wherein the three pressure equalizing grooves are the same in shape and size.

4. The hydraulic control pressure relief and overflow valve of claim 3, wherein the center of the spherical surface of the valve stem is a plane and the periphery is a curved surface.

5. The pressure-reducing overflow valve controlled by hydraulic pressure as claimed in claim 4, wherein the oil-passing hole is trumpet-shaped, and has a conical outer end and a cylindrical inner end.