CN203516861U

CN203516861U - Straight-through type one-way valve

Info

Publication number: CN203516861U
Application number: CN201320626794.3U
Authority: CN
Inventors: 许亚峰; 马思宇; 黄坤; 张辉; 陈艳花
Original assignee: Anhui University of Science and Technology
Current assignee: Anhui University of Science and Technology
Priority date: 2013-10-11
Filing date: 2013-10-11
Publication date: 2014-04-02
Anticipated expiration: 2023-10-11

Abstract

The utility model relates to a straight-through type one-way valve. The straight-through type one-way valve comprises a valve body, a valve element, a spring and a back-up ring, wherein the valve body is provided with a decided inside fluid passageway extending along the axis of the valve body, the valve element is arranged inside the valve body, the spring is arranged inside the valve element and used for abutting against the valve element, and the back-up ring is used for limiting the spring; the valve element is in a cone valve type, protruding parts are arranged on two axial end faces of the valve body respectively, a high-strength abrasion-resisting base is arranged at the position, making contact with the valve body, of the conical surface of the valve element, and the abrasion-resisting base is provided with a conical surface which is matched with the conical surface of the valve element. The straight-through type one-way valve is simple in structure; on one hand, the phenomenon that the one-way valve gets loose and falls off when connected to a pipe connector can be prevented effectively, on the other hand, the conical surface of the valve element is prevented from making direct contact with the valve body, extrusion stress is borne by the abrasion-resisting base, and abrasion to the valve element and the valve body is reduced.

Description

Straight check valve

Technical field

The utility model relates to field of hydraulic control, relates in particular to a kind of straight check valve.

Background technique

One-way valve is mainly used to control liquid stream one way flow in hydraulic system, and conventional one-way valve is divided into common one-way valve and Pilot operated check valve two classes.The effect of common one-way valve in hydraulic system is only to allow liquid stream to pass through along direction of pipeline, and flowing of another direction is cut off, and according to the difference of runner, common one-way valve has straight-through type and two kinds of typical structures of right-angle type.Straight check valve liquid flow inlet and outlet runner communicate, therefore be generally tubular type, install to connect (Taper Pipe by valve body two ends or straight pipe thread hole and pipe joint are connected in system).The spool of straight check valve has ball-valve type and two kinds of forms of cone valve type, larger extrusion stress is directly born in the spool conical surface and the valve body contacting point of the straight check valve of cone valve type, in long-time extruded process, can cause damage to the spool conical surface and valve body, reduce the sealing while oppositely damming; Simultaneously straight check valve with pipe joint connection procedure in, be prone to loosening and come off.

Model utility content

The utility model is in order to overcome deficiency of the prior art, a kind of straight check valve is provided, this one-way valve can effectively prevent the loosening and obscission that it occurs when being connected with pipe joint on the one hand, avoided on the other hand the spool conical surface to contact with the direct of valve body, by wear-resisting seat, bear extrusion stress, reduce the wearing and tearing of spool and valve body.

The utility model is to be achieved through the following technical solutions:

A kind of straight check valve, comprise have an internal fluid channels along its Axis Extension of determining valve body, be arranged in spool in valve body, spool for the spring of contact spool and spring carried out to spacing back-up ring, described spool is cone valve type spool, on two axial ends of described valve body, be equipped with male member, the conical surface of described spool and the contacting point of valve body are provided with high-strength abrasion-proof seat, described wear-resisting seat is provided with a conical surface, and this conical surface matches with the conical surface of spool.

As optimal technical scheme of the present utility model, described male member is round table-like.

Its working principle is: when liquid stream flows into from filler opening direction, the hydraulic coupling of oil suction chamber overcomes the surface friction drag between the active force, spool and the valve body that go out hydraulic coupling that oil pocket produces, spring acting on spool, back down spool, fluid flows to out oil pocket from oil suction chamber, realizes forward flow.For fear of spool, directly contact with valve body contacting point the extrusion stress that generation is larger, at the conical surface of spool and the contacting point of valve body, be provided with high-strength abrasion-proof seat, wear-resisting seat bears extrusion stress, reduces its damage to valve body and spool.When fluid is realized forward flow, the conical surface on wear-resisting seat is what to separate with the conical surface of spool, so that the passing through of fluid; When fluid oppositely ends, the conical surface on wear-resisting seat and the conical surface of spool fit tightly, to prevent the oppositely leakage of liquid stream.This straight check valve is connected with pipe joint when (Taper Pipe by valve body two ends or straight pipe thread hole and pipe joint are connected in system), by be equipped with round table-like male member on two axial ends of valve body, when mounted, on valve body, have in the first spinning in pipe joint in one end of round table-like male member, after round table-like male member is stressed, can make it deform, thereby the thread that makes valve body two ends is pressed on the thread of pipe joint, prevents that it is loosening and come off.

Compared with prior art, the beneficial effects of the utility model are: the utility model is simple in structure, can effectively prevent on the one hand the loosening and obscission that one-way valve occurs when being connected with pipe joint, avoided on the other hand the spool conical surface to contact with the direct of valve body, by wear-resisting seat, bear extrusion stress, reduce the wearing and tearing of spool and valve body.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the A portion enlarged view in Fig. 1.

In figure: 1, valve body; 2, spool; 3, spring; 4, back-up ring; 5, wear-resisting seat; 6, male member.

Embodiment

In order to make the purpose of this utility model, technological scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.

Refer to Fig. 1 and Fig. 2, wherein, Fig. 1 is structural representation of the present utility model, and Fig. 2 is the A portion enlarged view in Fig. 1.

Described a kind of straight check valve, comprise the valve body 1 with an internal fluid channels along its Axis Extension of determining, be arranged on the spool 2 in valve body 1, the interior spring 3 for contact spool 2 of spool 2, and spring 3 is carried out to spacing back-up ring 4, described spool 2 is cone valve type spool, on two axial ends of described valve body 1, be equipped with male member 6, described male member 6 is round table-like, the hardness of described male member 6 is lower than the hardness of valve body 1, to produce relatively large distortion, thereby the thread that makes valve body 1 two ends is pressed on the thread of pipe joint tightly, prevent that it is loosening and come off.When manufacturing installation, the center line of the center line of male member 6 and valve body 1, on same straight line, improves its coaxial accuracy.

The contacting point of the conical surface of described spool 2 and valve body 1 is provided with high-strength abrasion-proof seat 5, and described wear-resisting seat 5 is provided with a conical surface, and this conical surface matches with the conical surface of spool 2.Wear-resisting seat 5 bears extrusion stress, reduces its damage to valve 1 and spool 2, and when fluid is realized forward flow, the conical surface on wear-resisting seat 5 is what to separate with the conical surface of spool 2, so that the passing through of fluid; When fluid oppositely ends, the conical surface on wear-resisting seat 5 and the conical surface of spool 2 fit tightly, to prevent the oppositely leakage of liquid stream.

The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.

Claims

1. a straight check valve, comprise the valve body (1) with an internal fluid channels along its Axis Extension of determining, be arranged on the spool (2) in valve body (1), the interior spring (3) for contact spool (2) of spool (2), and spring (3) is carried out to spacing back-up ring (4), described spool (2) is cone valve type spool, it is characterized in that, on two axial ends of described valve body (1), be equipped with male member (6), the contacting point of the conical surface of described spool (2) and valve body (1) is provided with high-strength abrasion-proof seat (5), described wear-resisting seat (5) is provided with a conical surface, this conical surface matches with the conical surface of spool (2).

2. straight check valve according to claim 1, is characterized in that, described male member (6) is round table-like.