CN210450891U

CN210450891U - Injection pressurization isolation one-way valve of die casting machine

Info

Publication number: CN210450891U
Application number: CN201921109367.1U
Authority: CN
Inventors: 文春领; 袁茂凯; 马九洲
Original assignee: Liaoning Tianhai Tiancheng Equipment Manufacturing Co Ltd
Current assignee: Liaoning Tianhai Tiancheng Equipment Manufacturing Co Ltd
Priority date: 2019-07-16
Filing date: 2019-07-16
Publication date: 2020-05-05
Anticipated expiration: 2029-07-16

Abstract

The utility model provides a die casting machine injection pressurization isolation check valve, which comprises a valve sleeve and a valve core arranged in the valve sleeve, wherein a liquid outlet is radially arranged through the valve sleeve; one end of the valve sleeve in the axial direction is a liquid inlet, the other end of the valve sleeve is provided with a guide sleeve, and the central part of the guide sleeve is provided with a guide sleeve body for providing a guide function for the valve core; and a spring for resetting the valve core is arranged between the valve core and the guide sleeve. The utility model discloses the isolation check valve opening flow area who creates the providing is big, and flow resistance is little, because case light in weight, the acceleration is fast, therefore closes fastly, establishes the basis for pressing the stability of penetrating system work.

Description

Injection pressurization isolation one-way valve of die casting machine

Technical Field

The invention belongs to the technical field of hydraulic equipment and hydraulic elements, and particularly relates to an injection pressurization isolation one-way valve of a die casting machine.

Background

The injection system is an important component of the die casting machine, and the performance of the injection system is one of the key factors determining the quality of the die casting machine. Improving the rapid injection speed and reducing the pressure build-up time of pressurization are main measures for improving the overall performance of the injection system. The key point of the pressure building time is the closing time of the isolating one-way valve, the factors influencing the closing time are many, the mass of the movable valve core is the largest difference among the isolating one-way valves with various structures among the factors, and meanwhile, according to Newton's second law, the smaller the mass, the larger the acceleration, and the faster the closing and opening speeds. In the current injection system, pressure oil for pushing rapid injection during rapid injection generally forms an isolation one-way valve mechanism through a gap between a floating piston and a pressurizing piston rod or uses a common one-way valve structure as an isolation one-way valve to realize closing and isolation of high-pressure oil pressurized by an injection cylinder, and the valve core quality of the isolation one-way valves of the structures is generally higher, so that the reduction of pressure building time is restricted.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a pressure injection pressurization isolating one-way valve of a die casting machine, which is provided with a valve core in a flap valve mode and is light in weight.

In order to solve the technical problems, the technical scheme created by the invention is realized as follows:

a die casting machine injection pressurization isolation check valve comprises a valve sleeve and a valve core arranged in the valve sleeve, wherein a liquid outlet is formed in the valve sleeve in the radial direction; one end of the valve sleeve in the axial direction is a liquid inlet, the other end of the valve sleeve is provided with a guide sleeve, and the central part of the guide sleeve is provided with a guide sleeve body for providing a guide function for the valve core; and a spring for resetting the valve core is arranged between the valve core and the guide sleeve.

Furthermore, the valve core comprises a guide section matched with the guide sleeve body and a matching section which can form a closing relation with the valve seat body part on the valve sleeve.

Furthermore, the one end that the direction section is close to the cooperation section is equipped with the location section that is used for installing the spring, and this location section external diameter is the same with the direction section external diameter.

Furthermore, one side of the matching section facing the opening of the valve sleeve is provided with a matching conical surface.

Furthermore, after the valve core closes the liquid inlet, the outer edge of the guide section of the valve core does not protrude out of the guide sleeve.

Furthermore, when the valve core is opened to the maximum position, the total area of all the liquid outlets is not smaller than the area of the liquid inlet.

Furthermore, one end of the liquid inlet of the valve sleeve is provided with an installation section, and the outer surface of the installation section is provided with a sealing groove.

Furthermore, a positioning table matched with the valve sleeve is arranged on the guide sleeve.

The invention has the advantages and positive effects that: the isolating one-way valve has large opening flow area and small flow resistance, and the valve core adopts a flap valve mode, so that the isolating one-way valve is light in weight and high in acceleration, and therefore, the closing speed is high.

Drawings

FIG. 1 is a schematic structural diagram of the invention;

fig. 2 is a schematic structural diagram of the valve core in the invention.

In the figure: 1-a valve housing; 2-a valve core; 3-a liquid outlet; 4-liquid inlet; 5, a guide sleeve; 6-a guide sleeve body; 7-a spring; 8-a guide section; 9-a matching section; 10-a positioning section; 11-a mating conical surface; 12-a mounting section; 13-a seal groove; 14-positioning stage.

Detailed Description

It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

The following detailed description of the embodiments of the invention is provided.

An injection pressurizing isolation one-way valve of a die casting machine is shown in figures 1 and 2 and comprises a valve sleeve 1 and a valve core 2 arranged in the valve sleeve, wherein a liquid outlet 3 is radially arranged through the valve sleeve; one end of the valve sleeve in the axial direction is a liquid inlet 4, the other end of the valve sleeve is provided with a guide sleeve 5, and the central part of the guide sleeve is provided with a guide sleeve body 6 for guiding the valve core; and a spring 7 for resetting the valve core is arranged between the valve core and the guide sleeve.

The valve core comprises a guide section 8 matched with the guide sleeve body and a matching section 9 which can form a closed relation with the valve seat body part on the valve sleeve. When the pressure oil drives the valve core to move, the guide section is in sliding fit with the guide sleeve body, generally, the inner wall of the guide sleeve body and the outer surface of the guide section are subjected to finish machining, smooth and stable matching is guaranteed, and the reliability of the work of the injection system is guaranteed on the basis of the structure.

And one end of the guide section, which is close to the matching section, is provided with a positioning section 10 for mounting a spring, and the outer diameter of the positioning section is the same as that of the guide section. Generally, the external diameter of the positioning section is larger than that of the guide section, and the outer surface of the positioning section does not need finish machining, so that the finish machining cost of the guide section is reduced, and the machining difficulty is reduced. In addition, the valve sleeve can also directly adopt a standard cartridge valve structure, the installation size of the valve sleeve can meet GB/T2877-2007 installation and connection size of hydraulic two-way cover plate type cartridge valves, the interchangeability is better, and the valve sleeve can be directly interchanged with cartridge valves of the same type.

The side of the matching section facing the opening of the valve sleeve is provided with a matching conical surface 11. The matching conical surface can be better matched with the inner side (necking part) of the opening of the valve sleeve to realize the closing of the valve body.

After the valve core closes the liquid inlet, the outer edge of the guide section of the valve core does not protrude out of the guide sleeve. When the valve core is opened to the maximum position, the total area of each liquid outlet is not smaller than the area of the liquid inlet, and the flow area of the pressure oil is ensured.

One end of the liquid inlet of the valve sleeve is provided with an installation section 12, and the outer surface of the installation section is provided with a sealing groove 13, so that the valve sleeve is easy to install and reliable in sealing. In addition, the guide sleeve is provided with a positioning table 14 matched with the valve sleeve, and the positioning table part of the guide sleeve is inserted into the valve sleeve, so that the stability of matching is ensured.

When the pressure oil pump works, pressure oil flows in from the liquid inlet, the pressure of the liquid inlet cavity (A cavity) pushes the valve core away, and the pressure oil flows in the cavity (B cavity) and is discharged along the liquid outlet, so that a passage is realized. When the pressure of the cavity B is greater than or equal to that of the cavity A, the valve core is rapidly reset and closes the inlet under the assistance of the reset force of the spring, and the cavity A and the cavity B are cut off.

The isolating one-way valve has large opening flow area and small flow resistance, and the valve core adopts a flap valve mode, so that the isolating one-way valve is light in weight and high in acceleration, and therefore, the closing speed is high.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a die casting machine is penetrated pressure boost and is kept apart check valve which characterized in that: comprises a valve sleeve and a valve core arranged in the valve sleeve, and a liquid outlet is arranged in the radial direction of the valve sleeve; one end of the valve sleeve in the axial direction is a liquid inlet, the other end of the valve sleeve is provided with a guide sleeve, and the central part of the guide sleeve is provided with a guide sleeve body for providing a guide function for the valve core; and a spring for realizing the reset of the valve core is arranged between the valve core and the guide sleeve.

2. The injection pressurization isolating one-way valve of the die casting machine as claimed in claim 1, wherein: the valve core comprises a guide section matched with the guide sleeve body and a matching section which can form a closed relation with the valve seat body part on the valve sleeve.

3. The injection pressurization isolating one-way valve of the die casting machine as claimed in claim 2, wherein: one end of the guide section, which is close to the matching section, is provided with a positioning section for mounting a spring, and the outer diameter of the positioning section is the same as that of the guide section.

4. The injection pressurization isolating one-way valve of the die casting machine as claimed in claim 2, wherein: and one side of the matching section facing the opening of the valve sleeve is provided with a matching conical surface.

5. The injection pressurization isolating one-way valve of the die casting machine as claimed in claim 2, wherein: after the valve core closes the liquid inlet, the outer edge of the guide section of the valve core does not protrude out of the guide sleeve.

6. The injection pressurization isolating check valve of the die casting machine as claimed in any one of claims 2 to 5, wherein: when the valve core is opened to the maximum position, the total area of the liquid outlet is not smaller than that of the liquid inlet.

7. The injection pressurization isolating one-way valve of the die casting machine as claimed in claim 1, wherein: one end of the liquid inlet of the valve sleeve is provided with an installation section, and the outer surface of the installation section is provided with a sealing groove.

8. The injection pressurization isolating one-way valve of the die casting machine as claimed in claim 1, wherein: and a positioning table matched with the valve sleeve is arranged on the guide sleeve.