CN201407394Y

CN201407394Y - Check valve

Info

Publication number: CN201407394Y
Application number: CN2009201172141U
Authority: CN
Inventors: 杨凌志; 朱文忠; 梁正荣
Original assignee: ZHEJIANG XINYADI PHARMACEUTICAL MACHINERY CO Ltd
Current assignee: ZHEJIANG XINYADI PHARMACEUTICAL MACHINERY CO Ltd
Priority date: 2009-04-03
Filing date: 2009-04-03
Publication date: 2010-02-17
Anticipated expiration: 2019-04-03

Abstract

The utility model provides a check valve, belonging to the technical field of a valve. The check valve solves the problem that the valve core of the existing check valve moves extremely and slowly inthe liquid, the leakage phenomenon occurs and the measurement is inaccurate. The check valve comprises a valve body; the valve body is internally provided with a hollow chamber and an liquid inlet passage and a liquid outlet passage that are communicated with the hollow chamber; the hollow chamber is internally provided with the valve core; the valve core is a cylindrical shape and can slide alongthe internal wall of the hollow chamber; the external side of the valve core is provided with through troughs that are distributed in the axial direction; and the internal port of the liquid inlet passage is a conical shape; the end surface of the valve core, facing towards the internal port of the liquid inlet passage, is provided with a conical surface that matches with the internal port and can be sealed. The check valve is made of stainless steel material, is sealed by conical surfaces, and has the advantages of high sealing performance, good fluidness, exact measurement and long servicelife.

Description

One-way valve

Technical field

The utility model belongs to valve technology field, particularly a kind of one-way valve.

Background technique

It is of a great variety that valve relates to, and uses also to reach to extensively.One-way valve in the valve is that fluid can only be along a direction circulation, the intransitable valve of other direction.At present, the one-way valve that is applied in the liquid tank installation adopts glass or stainless spherical valve core mostly.A kind of structure-improved [China Patent No.: ZL200420078497.0 of spraying machine one-way valve for example, was once disclosed in the Chinese patent literature; Notice of authorization number: CN 2720218Y], piston is arranged in oil hydraulic cylinder, there is liquid outlet opening the end of oil hydraulic cylinder, piston is the tubular structure that is hollow, and its center is a liquid-through hole, is fixing a valve seat at piston near the end of liquid outlet opening, the center hole of valve seat communicates with liquid-through hole, the valve seat outside is provided with one can block the ball core that valve base center hole makes the sealing of valve seat place, and the ball core is spherical in shape, is provided with a spring between ball core and oil hydraulic cylinder.Can get from above-mentioned structure, spool is spherical in shape and links to each other with spring that when this structure valve was applied in the filling machine, when liquid was delivered to oil hydraulic cylinder by controlled pump, liquid backed down piston, and by piston, flows out from fill head.When the mobile bad liquid of can, spool moves very slow in liquid, thereby causes closed check valve untimely, makes to produce weeping, causes metering inaccurate.

Summary of the invention

The purpose of this utility model is to have the problems referred to above at existing technology, has proposed the not one-way valve of water clock of a kind of accurate measurement, can.

The purpose of this utility model can realize by following technical proposal: a kind of one-way valve, comprise valve body, have feed pathway and liquid outlet channel that cavity is connected with cavity in the valve body, in cavity, be provided with spool, it is characterized in that, described spool is column and can slides along cavity inner wall, the groove that has axial distribution on the spool outside, the inner port of described feed pathway is conical, has the conical surface that matches with above-mentioned inner port and can form sealing on the end face of feed pathway inner port at spool.

This one-way valve is applicable to liquid bottle filler, is specially adapted to the liquid bottle filler of the mobile difference of can.Liquid enters cavity from feed pathway, enters liquid outlet channel by the groove on the spool then.When oppositely flowing backwards appearred in liquid, liquid entered cavity and promotes spool from liquid outlet channel and slides, and made the conical surface formation conical surface seal of conical surface and feed pathway inner port on the spool end, thereby reached the unidirectional function of passing through.

In above-mentioned one-way valve, when described spool and feed pathway inner port formed sealing, spool had the gap between the end face of liquid outlet channel inner port and cavity.

In above-mentioned one-way valve, described spool is cylindrical, is uniformly distributed with 3～6 grooves on its outside.

In above-mentioned one-way valve, described spool has groove on the end face of liquid outlet channel inner port, and groove communicates with groove.When groove had guaranteed that this one-way valve is in common state, spool had enough big gap towards the end face and the liquid outlet channel inner port of liquid outlet channel inner port, makes flow of fluid unimpeded.

In above-mentioned one-way valve, described valve body and spool all adopt stainless steel material to make.Adopt stainless steel material to guarantee the corrosion resistance and the fastness of spool and valve body, also improved the weight of spool simultaneously, make the easier formation conical surface seal of spool and improve its sealing.

In above-mentioned one-way valve, described valve body comprises upper end cap with liquid outlet channel and the lower end cap with feed pathway, and described cavity is positioned on the lower end cap.Valve body is divided into upper end cap and lower end cap, and its structure is made valve body for convenience and spool is installed in the valve body.

In above-mentioned one-way valve, described upper end cap and lower end cap are by being threaded and being provided with seal ring in the joint.

Compared with prior art, this one-way valve adopts stainless steel material to make and adopt conical surface seal, so have the advantage of sealing height, good fluidity, accurate measurement, long service life.

Description of drawings

Fig. 1 is the sectional structure schematic representation of this one-way valve.

Fig. 2 is the perspective view of the spool of this one-way valve.

Among the figure, 1, lower end cap; 11, feed pathway; 12, cavity; 2, upper end cap; 21, liquid outlet channel; 3, seal ring; 4, spool; 41, groove; 42, groove; 43, conical surface; 5, valve body.

Embodiment

Below be specific embodiment of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.

As depicted in figs. 1 and 2, this one-way valve is applicable to liquid bottle filler, is specially adapted to the filling machine of the liquid of the mobile difference of can.It comprises valve body 5 and the spool 4 that adopts stainless steel material to make.

Specifically, valve body 5 comprises upper end cap 2 with liquid outlet channel 21 and the lower end cap 1 with feed pathway 11, also has the cylindrical cavity 12 of opening on the lower end cap 1, and feed pathway 11 is connected with cavity 12.Above-mentioned upper end cap 2 is fixed on the lower end cap 1 by screw thread and hides the opening of cavity 12, so the liquid outlet channel 21 on the upper end cap 2 is connected with cavity 12, be provided with seal ring 3 between upper end cap 2 and the lower end cap 1, the inner port of above-mentioned feed pathway 11 is conical.

Spool 4 is arranged in the cavity 12, and spool 4 is cylindric, and its outside is resisted against on the inwall of cavity 12, has four axially even distributions on the outside of spool 4 and is used for the groove 41 of logical liquid.Spool 4 has the conical surface 43 that matches with above-mentioned inner port and can form sealing towards the end face of feed pathway 11 inner port.When spool 4 formed sealing with feed pathway 11 inner port, spool 4 had the gap between the end face of liquid outlet channel 21 inner port and cavity 12, so spool 4 can slide along cavity 12 inwalls.Spool 4 has groove 42 towards the end face of liquid outlet channel 21 inner port, and groove 42 communicates over against liquid outlet channel 21 inner port and with groove 41.When this one-way valve is in common state, spool 4 can move to the inner port place of liquid outlet channel 21 towards liquid outlet channel 21 inner port ends, make gap between the two become down, the certain clearance that has that makes behind the groove 42 between this end face and liquid outlet channel 21 inner port is set, thereby has guaranteed that flow of fluid is unimpeded; When liquid when liquid outlet channel 21 enters cavity 12, liquid will inevitably be punched on groove 42 bottom surfaces, makes spool 4 have the power of a slip, more helps the sealing of spool 4 between the inner port of feed pathway 11.

Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.

Although this paper has used lower end cap 1 morely; Feed pathway 11; Cavity 12; Upper end cap 2; Liquid outlet channel 21; Seal ring 3; Spool 4; Groove 41; Groove 42; Conical surface 43; Valve body 5 terms such as grade, but do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain essence of the present utility model more easily; They are construed to any additional restriction all is contrary with the utility model spirit.

Claims

1, a kind of one-way valve, comprise valve body (5), have feed pathway (11) and liquid outlet channel (21) that cavity (12) is connected with cavity (12) in the valve body (5), in cavity (12), be provided with spool (4), it is characterized in that, described spool (4) is column and can slides along cavity (12) inwall, the groove (41) that has axial distribution on spool (4) outside, the inner port of described feed pathway (11) is conical, has the conical surface (43) that matches with above-mentioned inner port and can form sealing on the end face of feed pathway (11) inner port at spool (4).

2, one-way valve according to claim 1 is characterized in that, when described spool (4) and feed pathway (11) inner port formed sealing, spool (4) had the gap between the end face of liquid outlet channel (21) inner port and cavity (12).

3, one-way valve according to claim 1 and 2 is characterized in that, described spool (4) is cylindrical, is uniformly distributed with 3～6 grooves (41) on its outside.

4, one-way valve according to claim 1 and 2 is characterized in that, described spool (4) has groove (42) on the end face of liquid outlet channel (21) inner port, and groove (42) communicates with groove (41).

5, one-way valve according to claim 1 and 2 is characterized in that, described valve body (5) and spool (4) all adopt stainless steel material to make.

6, one-way valve according to claim 1 is characterized in that, described valve body (5) comprise have liquid outlet channel (21) upper end cap (2) and have the lower end cap (1) of feed pathway (11), described cavity (12) is positioned on the lower end cap (1).

7, one-way valve according to claim 6 is characterized in that, described upper end cap (2) and lower end cap (1) are by being threaded and being provided with seal ring (3) in the joint.