CN216714856U

CN216714856U - Two-way check valve of pneumatic control hydraulic circuit

Info

Publication number: CN216714856U
Application number: CN202123163169.3U
Authority: CN
Inventors: 朱言刚; 陈曦
Original assignee: Suzhou Jinghou Intelligent Equipment Co ltd
Current assignee: Suzhou Jinghou Intelligent Equipment Co ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-06-10
Anticipated expiration: 2031-12-16

Abstract

The utility model discloses a two-way check valve of a pneumatic control hydraulic circuit, which comprises a valve body and an upper aluminum cover, wherein the upper aluminum cover is arranged above the valve body; and a check seat is also arranged in the valve cavity and is positioned below the switching piston. The pressure of the utility model is pneumatically controlled, the sealing stability is ensured, the problems that the pressure maintaining performance is unstable and even the pressure can not be maintained when the oil product in the oil way is sealed by the cartridge valve which is frequently used and has small particle impurities are effectively solved, and the utility model can realize good flexible sealing effect and stable pressure maintenance when the oil way is poor in oil quality or has small particle impurities.

Description

Two-way check valve of pneumatic control hydraulic circuit

Technical Field

The utility model relates to the technical field of valve bodies, in particular to a two-way check valve of a pneumatic control hydraulic loop.

Background

The check valve is a valve which automatically opens and closes a valve flap depending on the flow of a medium, is used for preventing the backflow of the medium, can be used for preventing a pump and a driving motor from reversely rotating, can be used for a pipeline for supplying an auxiliary system in which the pressure can rise to exceed the system pressure, and is not suitable for the medium containing solid particles and having higher viscosity. However, the existing check valve has the condition that the pressure maintaining performance is unstable and even the pressure can not be maintained when oil products have small particle impurities.

SUMMERY OF THE UTILITY MODEL

In order to overcome the disadvantages of the prior art, the present invention provides a two-way check valve for a pneumatic control hydraulic circuit, which solves the above mentioned problems in the prior art.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a two-way check valve of a pneumatic control hydraulic circuit comprises a valve body and an upper aluminum cover, wherein the upper aluminum cover is arranged above the valve body, a valve cavity is arranged in the valve body, a switching piston is arranged in the valve cavity, and the top end of the switching piston is arranged in the upper aluminum cover; and a check seat is also arranged in the valve cavity and is positioned below the switching piston.

Preferably, the upper part of the switching piston is sleeved with a piston spring, the upper end of the piston spring is tightly attached to the inner end face of the upper aluminum cover, and the lower end of the piston spring is fixed on the upper end face of the valve body.

More preferably, the lower part of the switching piston is sleeved on a switching guide cylinder, the switching guide cylinder is arranged in the valve cavity, and the switching piston moves up and down along the switching guide cylinder.

Preferably, the valve body is further provided with an oil return port, an oil inlet and an oil outlet which are communicated with the valve cavity.

Preferably, the bottom of the valve body is provided with an auxiliary oil inlet channel communicated with the valve cavity, and an oil inlet valve is arranged in the auxiliary oil inlet channel.

More preferably, the valve further comprises an air inlet, wherein one end of the air inlet is arranged on the valve body, and the other end of the air inlet is arranged on the upper aluminum cover.

More preferably, a check spring is arranged in the check seat.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model relates to a bidirectional check device for controlling a pneumatic oil circuit pump station, which comprises a check valve body, wherein two sealing cavities are arranged in a valve cavity, one sealing cavity is arranged at the contact part of an oil inlet valve and a valve cavity, and the other sealing cavity is arranged at the contact part of a switching guide cylinder and the valve cavity; the bidirectional check device is an innovative design in injection molding machines, die casting machines and rapid die changing equipment of punch presses, and is matched with a 220V electric pump and an electronic digital display pressure sensor, and a reversing valve to realize automatic clamping of a clamp, and can be matched with a pneumatic pump to realize the automatic clamping.

The valve body is stable in sealing, the problem that pressure maintaining performance is unstable and even pressure can not be maintained when oil in an oil way is sealed by a cartridge valve frequently used due to small particle impurities is effectively solved, and the device can be good in flexible sealing effect and stable in pressure maintaining when the oil in the oil way is poor in quality or small particle impurities exist.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention.

In the figures, the various reference numbers are:

1-mounting an aluminum cover; 2-a valve body; 3-switching the piston; 4-a piston spring; 5-switching guide cylinder; 6-check seat; 7-a non-return spring; 8-an oil inlet valve; 9-oil return port; 10-an oil outlet; 11-an oil inlet; 12-air inlet.

Detailed Description

In order to more clearly illustrate the present invention, the present invention will be described in further detail below with reference to examples and the accompanying drawings. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the utility model.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, and integral connections; can be mechanically or electrically connected; they may be directly connected to each other, indirectly connected to each other through an intermediate member, or connected to each other through the inside of two members. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Example (b):

as shown in fig. 1, the two-way check valve of the pneumatic control hydraulic circuit comprises a valve body 2 and an upper aluminum cover 1, wherein the upper aluminum cover 1 is arranged above the valve body 2, a valve cavity is arranged in the valve body 2, the valve body 2 is also provided with an oil return port 9, an oil inlet 10 and an oil outlet 11 which are communicated with the valve cavity, the two-way check valve further comprises an air inlet 12, one end of the air inlet 12 is arranged on the valve body, and the other end of the air inlet 12 is arranged on the upper aluminum cover 1; a switching piston 3 is arranged in the valve cavity, and the top end of the switching piston 3 is arranged in the upper aluminum cover 1; the upper part of the switching piston 3 is sleeved with a piston spring 4, the upper end of the piston spring 4 is tightly attached to the inner end face of the upper aluminum cover 1, and the lower end of the piston spring 4 is fixed on the upper end face of the valve body 2; the lower part of the switching piston 3 is sleeved on a switching guide cylinder 5, the switching guide cylinder 5 is arranged in the valve cavity, and the switching piston 3 moves up and down along the switching guide cylinder 5. A check seat 6 is also arranged in the valve cavity, the check seat 6 is positioned below the switching piston 3, and a check spring 7 is arranged in the check seat 6; an auxiliary oil inlet channel communicated with the valve cavity is arranged at the bottom of the valve body 2, an oil inlet valve 8 is arranged in the auxiliary oil inlet channel, and when the oil inlet 11 breaks down, the oil inlet valve 8 can be opened, so that oil enters the inner part of the foaming wall of the valve body 2 from the auxiliary oil inlet channel.

Oil enters from the oil inlet 11, the check seat 6 is jacked upwards, and the oil flows out from the oil outlet 10 and enters the die clamper, so that the pressurization of the die clamper is realized; when pressure is required to be relieved, air enters the upper aluminum cover 1 from the air inlet 12 to push the switching piston 3 to move upwards, and oil in the valve cavity and the die clamper flows out, so that the action of pressure relief is realized.

The pressure high point low point of this embodiment all has the compensation function, and the elasticity is moulding, guarantees sealed stable, has effectively solved the cartridge valve that oil has the small particle impurity to use often when the oil circuit and has sealed the unstable problem that can appear the pressurize performance even pressure can not keep, and this device can be poor or when having small particle impurity flexible seal effectual in the oil circuit oil, and pressure keeps stable.

It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications can be made on the basis of the above description, and all the implementation methods cannot be exhaustive, and the obvious variations or modifications introduced in the technical scheme of the present invention are within the protection scope of the present invention.

Claims

1. A two-way check valve of a pneumatic control hydraulic circuit comprises a valve body and an upper aluminum cover, wherein the upper aluminum cover is arranged above the valve body; and a check seat is also arranged in the valve cavity and is positioned below the switching piston.

2. The two-way check valve of a pneumatic control hydraulic circuit of claim 1, wherein the upper portion of the switching piston is sleeved with a piston spring, the upper end of the piston spring is tightly attached to the inner end face of the upper aluminum cover, and the lower end of the piston spring is fixed to the upper end face of the valve body.

3. The bi-directional check valve of a pneumatic control hydraulic circuit of claim 2, wherein a lower portion of the switching piston is fitted over a switching guide cylinder, the switching guide cylinder is disposed in the valve chamber, and the switching piston moves up and down along the switching guide cylinder.

4. The two-way check valve of a pneumatic control hydraulic circuit of claim 1, wherein the valve body is further provided with an oil return port, an oil inlet and an oil outlet which are communicated with the valve cavity.

5. The two-way check valve of the pneumatic control hydraulic circuit according to claim 1, wherein an auxiliary oil inlet passage communicated with the valve cavity is arranged at the bottom of the valve body, and an oil inlet valve is arranged in the auxiliary oil inlet passage.

6. The two-way check valve of a pneumatic control hydraulic circuit of claim 1, further comprising an air inlet, wherein one end of the air inlet is disposed on the valve body, and the other end of the air inlet is disposed on the upper aluminum cover.

7. The two-way check valve of a pneumatic control hydraulic circuit of any one of claims 1-6, wherein a check spring is disposed in the check seat.