CN210397293U

CN210397293U - Breather valve for engineering machinery

Info

Publication number: CN210397293U
Application number: CN201921018343.5U
Authority: CN
Inventors: 张海洋
Original assignee: Wuxi Haizhuo Like Hydraulic Machinery Co ltd
Current assignee: Wuxi Haizhuo Like Hydraulic Machinery Co ltd
Priority date: 2019-07-02
Filing date: 2019-07-02
Publication date: 2020-04-24
Anticipated expiration: 2029-07-02

Abstract

The utility model relates to a breather valve for engineering machinery, which comprises an external housing, a filter element and an air pressure valve adjusting device; an upper cover is arranged at the center of the upper surface of the outer housing, and a leather pad is arranged at the joint of the filter element connecting seat and the filter element; a screw rod is vertically sleeved in the filter element, and a first spring is sleeved at the position, located in the filter element, on the screw rod; the bottom of the outer housing is fixedly provided with a filter valve base through screws; a movable self-sealing sliding block is arranged at the position, close to the connection part of the outer housing and the filter valve base, of the screw rod, and a leather pad is arranged at the connection part of the movable self-sealing sliding block and the outer housing; the bottom of lead screw is equipped with the extension, and the extension is vertical to be extended to in the filter valve base, cup joint on the extension and be equipped with the second spring, the bottom of second spring is fixed the internal surface bottom of filter valve base, the top of second spring is equipped with sealed fixed chassis of pad perpendicularly. The utility model provides a pair of breather valve for engineering machine tool can carry out effective filtration to the oil return, guarantees the inside oil tank cleanliness of hydraulic pressure station.

Description

Breather valve for engineering machinery

Technical Field

The utility model relates to a hydraulic oil filter technical field, especially a breather valve for engineering machine tool.

Background

The filter is an indispensable device on a medium conveying pipeline, is usually arranged on a pressure reducing valve, a pressure relief valve and a constant water level valve, and a filter cartridge with a certain specification of filter screen in the filter can block impurities. Filters can be generally classified into liquid filters and air filters. The last oil tank of engineering machine tool is used for a long time, and sediment greasy dirt impurity is pressed from both sides to inside air, needs in time get rid of, need filter it at exhaust in-process, prevents to pollute the environment on every side, rushes into the air after filtering simultaneously, guarantees that inside oil pressure is normal.

In view of the above problems, it is desirable to provide a breather valve for construction machinery.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a breather valve for engineering machine tool can carry out effective filtration to the oil return, guarantees the inside oil tank cleanliness factor in hydraulic pressure station.

In order to achieve the purpose of the utility model, the breather valve for the engineering machinery comprises an external housing, a filter element and an air pressure valve adjusting device; an upper cover is arranged at the center of the upper surface of the outer housing and detachably fixed on the outer housing through screws, the filter element is fixed in the outer housing through a filter element connecting seat, and a filter element leather pad is arranged at the connecting part of the filter element connecting seat and the filter element; a lead screw is vertically sleeved in the filter element, the upper part of the lead screw extends to the upper surface of the outer housing, the lower part of the lead screw extends to the bottom of the outer housing, a limiting fixing nut is arranged at the head of the lead screw, and a first spring is sleeved at the position, positioned in the filter element, of the lead screw; the bottom of the outer housing is fixedly provided with a filter valve base through screws; a movable self-sealing sliding block is arranged at the position, close to the connection part of the outer housing and the filter valve base, of the screw rod, and a leather pad is arranged at the connection part of the movable self-sealing sliding block and the outer housing; the bottom of the screw rod is provided with an extension part, the extension part vertically extends into the filter valve base, a second spring is sleeved on the extension part, the bottom of the second spring is fixed to the bottom of the inner surface of the filter valve base, the top of the second spring is vertically provided with a sealing gasket fixing chassis, a matched sealing gasket is arranged on the sealing gasket fixing chassis, and a gasket is fixedly arranged on the upper portion, located on the sealing gasket, of the extension part on the screw rod; and a plurality of air inlet channels are arranged on the filter valve base.

Preferably, a ring of O-shaped ring is arranged at the joint of the outer casing and the filter valve base.

Preferably, a plurality of reinforcing ribs are arranged on the outer casing.

The working principle is as follows: when the air needs to be exhausted, the air in the oil tank enters the external housing from the oil tank and passes through the filter element, the first spring is extended under the action of air pressure, the second spring is compressed, the movable self-sealing sliding block is opened, and the filtered air is exhausted;

when air needs to be fed, the external air passes through the air inlet channel of the filter valve base, under the action of air pressure, the second spring is extended, the first spring is compressed, the gasket moves upwards, and the air enters the filter element to be filtered and then enters the oil tank.

The utility model discloses a breather valve for engineering machine tool compares with prior art and has following advantage:

(1) the breather valve for engineering machinery provided by the utility model realizes positive and negative air filtration of hydraulic oil, ensures the cleanness in the oil tank and prolongs the service life of the oil tank;

(2) the utility model provides a breather valve for engineering machine tool, simple structure, convenient operation is swift, safe and reliable.

Drawings

Fig. 1 is a sectional view of a breather valve for construction machinery according to the present invention;

fig. 2 is a schematic structural diagram of a filter element of a breather valve for engineering machinery according to the present invention;

FIG. 3 is an enlarged view of a portion of the bottom of the lead screw of FIG. 1;

fig. 4 is a top view of the breather valve for construction machinery according to the present invention.

Detailed Description

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

As shown in fig. 1 to 4, a breather valve for construction machinery comprises an outer casing 4, a filter element 5 and an air pressure valve adjusting device; an upper cover 2 is arranged at the center of the upper surface of the outer housing 4, the upper cover 2 is detachably fixed on the outer housing 4 through screws, the filter element 5 is fixed in the outer housing 4 through a filter element connecting seat 18, and a filter element leather gasket 12 is arranged at the joint of the filter element connecting seat 18 and the filter element 5 in order to ensure the sealing property between the filter element connecting seat 18 and the filter element 5 and prevent oil leakage; a screw rod 1 is vertically sleeved in the filter element 5, the upper part of the screw rod 1 extends to the upper surface of the outer housing 4, the lower part of the screw rod 1 extends to the bottom of the outer housing 4, a limiting fixing nut 3 is arranged at the head part of the screw rod 1, and a first spring 6 is sleeved at the position, located in the filter element 5, of the screw rod 1; the bottom of the outer housing 4 is fixedly provided with a filter valve base 17 through screws; a movable self-sealing sliding block 7 is arranged at the position, close to the connection part of the outer housing 4 and the filter valve base 17, of the screw rod 1, and a leather pad 8 is arranged at the connection part of the movable self-sealing sliding block 7 and the outer housing 4; an extension part 11 is arranged at the bottom of the screw rod 1, the extension part 11 vertically extends into the filter valve base 17, a second spring 16 is sleeved on the extension part 11, the bottom of the second spring 16 is fixed at the bottom of the inner surface of the filter valve base 17, a sealing gasket fixing chassis 14 is vertically arranged at the top of the second spring 16, a sealing gasket 15 matched with the sealing gasket is arranged on the sealing gasket fixing chassis 14, and a gasket 10 is fixedly arranged on the upper part of the sealing gasket on the extension part on the screw rod 1; and a plurality of air inlet channels are arranged on the filter valve base 17.

In order to enhance the sealing between the outer casing 4 and the filter valve base 17, a ring of O-rings 13 is provided at the junction of the outer casing 4 and the filter valve base 17.

In order to enhance the strength of the outer cover, a plurality of reinforcing ribs are arranged on the outer cover 4.

Description of the operation: when the air needs to be exhausted, the air in the oil tank enters the external housing from the oil tank and passes through the filter element, under the action of air pressure, the first spring 6 is extended, the second spring 16 is compressed, the movable self-sealing sliding block 7 is opened, and the filtered air is exhausted;

when air needs to be fed, external air passes through the air inlet channel of the filter valve base 17, under the action of air pressure, the second spring 16 is extended, the first spring 6 is compressed, the gasket 10 moves upwards, and the air enters the filter element 5 to be filtered and then enters the oil tank.

It should be noted that, during the air discharge, the air is filtered on the filter element 5 from outside to inside; when air is supplied, the air is filtered on the filter element 5 from inside to outside.

In the description of the present specification, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of describing the technical solutions of the present patent and for simplification of the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be interpreted as limiting the present patent application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this patent application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this specification, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present specification can be understood by those of ordinary skill in the art as appropriate.

In this specification, unless explicitly stated or limited otherwise, a first feature may be "on" or "under" a second feature such that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A breather valve for engineering machinery is characterized by comprising an external housing, a filter element and an air pressure valve adjusting device; an upper cover is arranged at the center of the upper surface of the outer housing and detachably fixed on the outer housing through screws, the filter element is fixed in the outer housing through a filter element connecting seat, and a filter element leather pad is arranged at the connecting part of the filter element connecting seat and the filter element; a lead screw is vertically sleeved in the filter element, the upper part of the lead screw extends to the upper surface of the outer housing, the lower part of the lead screw extends to the bottom of the outer housing, a limiting fixing nut is arranged at the head of the lead screw, and a first spring is sleeved at the position, positioned in the filter element, of the lead screw; the bottom of the outer housing is fixedly provided with a filter valve base through screws; a movable self-sealing sliding block is arranged at the position, close to the connection part of the outer housing and the filter valve base, of the screw rod, and a leather pad is arranged at the connection part of the movable self-sealing sliding block and the outer housing; the bottom of the screw rod is provided with an extension part, the extension part vertically extends into the filter valve base, a second spring is sleeved on the extension part, the bottom of the second spring is fixed to the bottom of the inner surface of the filter valve base, the top of the second spring is vertically provided with a sealing gasket fixing chassis, a matched sealing gasket is arranged on the sealing gasket fixing chassis, and a gasket is fixedly arranged on the upper portion, located on the sealing gasket, of the extension part on the screw rod; and a plurality of air inlet channels are arranged on the filter valve base.

2. The breather valve for construction machinery according to claim 1, wherein a ring of O-ring is provided at the connection between the outer casing and the filter valve base.

3. The breather valve for construction machinery according to claim 1 or 2, wherein the outer housing is provided with a plurality of reinforcing ribs.