CN205190850U

CN205190850U - Check valve

Info

Publication number: CN205190850U
Application number: CN201520949581.3U
Authority: CN
Inventors: 项小波; 杨勇; 王燕峰
Original assignee: WENZHOU SUOTE PHARMACEUTICAL AND CHEMICAL ENGINEERING Co Ltd
Current assignee: WENZHOU SUOTE PHARMACEUTICAL AND CHEMICAL ENGINEERING Co Ltd
Priority date: 2015-11-24
Filing date: 2015-11-24
Publication date: 2016-04-27
Anticipated expiration: 2025-11-24

Abstract

The utility model discloses a check valve, include: the valve body that both sides have the opening, supply the medium to pass sets up the case of blocking the valve body in the valve body, through reciprocating motion to it moves to the case to reach provides the elastic component of restoring force, it contradicts with the case still to be provided with in the valve body seals the disk seat of valve body, and its technical essential lies in: the arch has the guide structure who keeps the tight disk seat of the accurate subsides of case on the case, aims at providing a case and replys the check valve who fixes a position accuracy, effective anti -return.

Description

Safety check

Technical field

The utility model relates to a kind of valve, and more particularly it relates to a kind of safety check.

Background technique

Safety check refers to and relies on medium flowing itself and automatic open and close flap, is used for the valve preventing medium from flowing backwards, also known as check valve, one-way valve, reflux valve and back pressure valve.Safety check belongs to a kind of automatic valve, and its Main Function prevents medium from flowing backwards, prevents pump and drive motor reversion, and the releasing of vessel media.

At present, be disclose a kind of low-resistance check valve in the Chinese utility model patent of CN201110422257.2 in the patent No., it is characterized in that: the valve gap that there is valve body and be connected with valve body, in the cavity that valve body and valve gap are formed, be provided with one-way valve; The end of described valve body and valve gap forms water intake and water outlet respectively, and described water intake, water outlet are consistent with the center line of one-way valve; Described one-way valve comprises valve seat, the spool matched with valve seat, is connected to the valve rod on spool, and guide sleeve of joining sliding with valve rod, is equipped with spring one between described guide sleeve and spool; Described valve rod downstream has radial triangular groove; Described guide sleeve is made up of inner ring and outer ring, connected by connecting tendon between inside and outside circle, the center of every root connecting tendon is drilled with through hole, is provided with steel ball, spring two and adjusting screw in through hole in order, and steel ball acts on when spool is closed on the inclined-plane on the left of valve rod triangular groove.

Aforementioned patents disclose a kind of Lift check valve, Lift check valve in use, utilize the flowing pressure extruding spool of medium, Open valve is carried out by spool Compress Spring, when spool replys closing position, owing to lacking guiding, position structure between spool and valve seat, the conflict between spool and valve seat is easily caused to occur skew, destroy the anti-backflow effect of safety check, cause safety check to occur the situation of backflow.

Model utility content

For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of spool to reply the safety check of accurate positioning, effectively anti-backflow.

For achieving the above object, the utility model provides following technological scheme: a kind of safety check, comprise: the valve body that both sides have opening, pass for medium, be arranged in valve body, blocked the spool of valve body by to-and-fro motion, and valve core movement is provided to the elastic component of restoring force; The valve seat with spool conflict closed valve is also provided with, wherein: described spool projection has the guide structure keeping spool to be accurately adjacent to valve seat in valve body.

The utility model is set to further: described guide structure be arranged on spool dorsad elastic component one side on directional post, the outside of this directional post and the inwall of valve body are conflicted.

The utility model is set to further: described directional post is provided with 4, and described directional post is evenly distributed in the circumference of spool.

The utility model is set to further: the arc-shaped of phase to the inside in indent of described directional post is arranged.

Compared with prior art, safety check in the utility model is conflicted by utilizing directional post and valve interior wall to be formed to slide, the to-and-fro motion of spool is played effectively, position-limiting action accurately, ensure that each spool rises returning position when putting after decline Compress Spring, can be formed with valve seat and seal conflict accurately, ensure the sealability of safety check when anti-backflow, the movement position of this structure valve core is fixed, prevent back that leakage is effective, working life is of a specified duration.

Accompanying drawing explanation

Fig. 1 is the sectional view of the utility model embodiment safety check;

Fig. 2 is the plan view of the utility model embodiment safety check;

Fig. 3 is the stereogram of the utility model embodiment safety check.

Reference character: 1, valve body; 11, upper valve body; 12, lower valve body; 13, clip; 14, valve seat; 15, fixed plate; 16, opening; 2, spool; 21, piston rod; 3, elastic component; 4, guide structure.

Embodiment

Referring to figs. 1 through Fig. 3, the utility model embodiment safety check is described further.

A kind of safety check, comprise the valve body 1 that both sides have opening, pass for medium, this valve body 1 is covered by upper valve body 11 and lower valve body 12 and forms, and described upper valve body 11 and lower valve body 12 are locked by clip 13.Also comprise and be arranged in valve body 1, the spool 2 of valve body 1 is blocked by to-and-fro motion, and spool 2 motion is provided to the elastic component 3 of restoring force, known see Figure of description 1, valve body 1 inside is provided with horizontal fixed plate 15, the central position of this fixed plate 15 offers jack, the central position of described spool 2 is to lower convexity piston rod 21, this piston rod 21 inserts in jack, elastic component 3 (being preferably spring) is then set in outside piston rod 21, sandwiched and between spool 2 and fixed plate 15, spool 2 is made to move up and down by opposing fixed plate 15, some openings 16 are also offered in the outer rim of fixed plate 15.Also be provided with the valve seat 14 of closed valve 1 of conflicting with spool 2 in valve body 1, when spool 2 top is by the downward compression elastic piece 3 of pressure medium effect, spool 2 is separated with valve seat 14, now valve body 1 UNICOM.When upper dielectric stops, spool 2 supports home position and valve seat 14 next time by elastic component 3 elastic force and conflicts and seal, and when bottom medium upwards overflows, spool 2 bottom is conflicted by the pressure effect maintenance of medium and valve seat 14, anti-backflow.

Described spool 2 projection has the guide structure 4 keeping spool 2 to be accurately adjacent to valve seat 14.Described guide structure be arranged on spool 2 dorsad elastic component 3 one side on directional post, the outside of this directional post and the inwall of valve body 1 are conflicted.Described directional post is provided with 4, and described directional post is evenly distributed in the circumference of spool 2.Conflict by utilizing directional post and valve body 1 inwall to be formed to slide, the to-and-fro motion of spool 2 is played effectively, position-limiting action accurately, ensure that each spool 2 rises returning position when putting after decline Compress Spring, can be formed with valve seat 14 and seal conflict accurately, ensure the sealability of safety check when anti-backflow, the movement position of this structure valve core 2 is fixed, prevent back that leakage is effective, and working life is of a specified duration.

In the utility model, guide structure 4 also has another kind of mode of execution, and the madial wall of the outer and valve body 1 that are set to spool 2 by described guide structure 4 is conflicted, and utilize the madial wall of valve body 1 to play the guiding role to spool 2, program structure is simpler.But the program may cause the wearing and tearing of spool 2 due to spool 2 and the frequent friction of valve body 1 madial wall.

The utility model additionally provides further improvement project, and the arc-shaped of phase to the inside in indent of described directional post is arranged.Thus the space that less directional post takies, improve the useful load area of spool, ensure the working efficiency of safety check.

The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, all within design concept of the present utility model, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.

Claims

1. a safety check, comprising: the valve body that both sides have opening, pass for medium, is arranged in valve body, is blocked the spool of valve body by to-and-fro motion, and valve core movement is provided to the elastic component of restoring force; In valve body, be also provided with the valve seat with spool conflict closed valve, it is characterized in that: described spool projection has the guide structure keeping spool to be accurately adjacent to valve seat.

2. safety check according to claim 1, is characterized in that: described guide structure be arranged on spool dorsad elastic component one side on directional post, the outside of this directional post and the inwall of valve body are conflicted.

3. safety check according to claim 2, is characterized in that: described directional post is provided with 4, and described directional post is evenly distributed in the circumference of spool.

4. safety check according to claim 3, is characterized in that: the arc-shaped of phase to the inside in indent of described directional post is arranged.