CN102392906A

CN102392906A - One-way valve

Info

Publication number: CN102392906A
Application number: CN2011103652592A
Authority: CN
Inventors: 陶华丽
Original assignee: HUANGSHAN BILI PRECISION PLASTIC INDUSTRY TECHNOLOGY Co Ltd
Current assignee: HUANGSHAN BILI PRECISION PLASTIC INDUSTRY TECHNOLOGY Co Ltd
Priority date: 2011-11-17
Filing date: 2011-11-17
Publication date: 2012-03-28

Abstract

The invention belongs to the field of automobile fittings, and in particular relates to a one-way valve. The one-way valve is made of elastic materials, and comprises a tubular-cavity-shaped valve body and a valve core arranged in the valve body, wherein the valve core is in the shape of a conical hollow structure; a cut is formed at the upper part of conical shape of the valve core; and the bottom end of the conical shape of the valve core and the inner wall of the valve body are fixedly connected and form an integrated structure. According to the invention, by changing the original monolithic flap-type design with a too large active path into a symmetrical design, when a reverse cut-off pressure is applied on the valve, the pressure originally borne by the monolithic flap is simultaneously borne by the annular conical surfaces of the valve core. That is to say, the original large active path of the monolithic flap is evenly distributed to the annular conical surfaces of the valve core, and a slight movement of each conical surface constitutes the start-stop operation of the one-way valve, and therefore the valve has more sensitive response, the device is more reliable and stable in operation, and at the same time the phenomenon of fatigue damage resulting from the large active range of the monolithic valve flap is avoided, thus the valve has a longer service life.

Description

A kind of one-way valve

Technical field

The invention belongs to the auto parts machinery field, be specifically related to a kind of one-way valve.

Background technique

One-way valve is the unidirectional keying element that prevents fluid on all kinds of pipelines or the equipment or gas medium adverse current.Automotive oil tank in the course of the work; Change because of the minimizing of its inner chamber amount of gasoline produces fuel tank external and internal pressure difference, just need one-way valve to be used as controlling element this moment, and it is through constantly replenishing air to the fuel tank inner chamber; Make the fuel tank external and internal pressure equate; Thereby avoid inhaling flat oil box, stop the volatilization of gasoline in the case simultaneously again, to play unidirectional air inlet, reverse closed circuit effect because of fuel tank inner chamber negative pressure is excessive.Existing one-way valve all is the split-type design that spool separates with valve body; Often need experience like a plurality of operations such as injection moulding, assembling, welding; Not only have complex structure, produce the loaded down with trivial details defective of assembly process, the sealing problem of its weld is difficult to solve all the time simultaneously, causes the instability in actual yield rate and working life; Functional reliability is lower, brings very big puzzlement to the staff.

To above-mentioned situation; The application people is that " a kind of rubber one-way valve " (patent No.: 201779316) announced following technological scheme: said rubber one-way valve comprises valve body for the patent name of Xiamen Aisilin Sanitary Ware Fittings Co., Ltd.; Valve body is processed by rubber; Comprise upper reaches valve body, downstream valve body and be positioned at fluid passage between the two, the downstream valve body is provided with incision and funneling angle.Such scheme can be regarded as the one-way passage operation that the monolithic valve that constitutes through its funneling angle is realized its valve body; When negative pressure occurring when amount of gasoline minimizing in the fuel tank; Ambient air gets into supplementary pressure in the fuel tank inner chamber by the otch at its funneling angle top, and when tank pressure was enough, the monolithic valve that constitutes funneling angle was inaccessible; Make its otch sealing, thereby realize its unidirectional air inlet purpose.Said structure is no doubt simple in structure, but still has following defective: at first, because above-mentioned funneling angle is the design of monolithic valve formula, the active path that causes it to open and close repeatedly is excessive, is easy to produce fatigue damage, finally causes greatly reduce its working life; Secondly, because that above-mentioned one-way valve profile is is cylindrical, the arc outer wall cooperation place of funneling angle of arc and valve body is able to constitute its incision; Yet in practical application; Make suitable funneling angle and at funneling angle top correct position be provided with incision all very the difficulty, manufacture inconvenience, simultaneously; Funneling angle cooperates with the arc of valve body also causes the stronger and pliable and tough deficiency of its rigidity; Functional reliability is difficult to guarantee, the external structure of its spool also is easy to make its incision to touch foreign object and suffer damage, thereby is difficult to be used widely.

Summary of the invention

The purpose of this invention is to provide a kind of one-way valve simple in structure, its long service life, equipment work reliable and stable.

For realizing above-mentioned purpose; The present invention has adopted following technological scheme: a kind of one-way valve; Processed by elastic material, comprise tube chamber shape valve body and be arranged at the spool in the valve body, said spool profile is hollow cone structure; The conical upper of said spool offers otch, affixed and formation integral structure between the tapered bottom end of said spool and valve interior wall.

Major advantage of the present invention is: the spool of the hollow cone structure that elastic material is processed and the otch of offering at an upper portion thereof itself have constituted unidirectional keying unit, have promptly satisfied the unidirectional air inlet and the reverse demand of ending of one-way valve; Simultaneously, change into the symmetric type design through the design of the excessive monolithic valve formula of the active path that it is original, when its when receiving reverse cutoff pressure; Originally the pressure that is born by the monolithic valve is born by the circular cone of spool simultaneously; That is to say that the large-scale active path of monolithic valve has originally all been assigned on the circular cone of spool, the tiny action of its each conical surface has promptly constituted the keying operation of one-way valve; React more sensitive; Equipment work is reliable and stable more, has also avoided simultaneously the generation of the fatigue damage phenomenon that the big the sphere of activities because of the monolithic valve causes, its longer service life.

Description of drawings

Fig. 1 is a structure cross-sectional schematic of the present invention;

Fig. 2 is the A-A cross-sectional schematic of Fig. 1.

Embodiment

A kind of one-way valve; Process by elastic material; Comprise tube chamber shape valve body 10 and be arranged at the spool 20 in the valve body 10, it is characterized in that: said spool 20 profiles are hollow cone structure, and the conical upper of said spool 20 offers otch 21; Affixed and formation integral structure between the tapered bottom end of said spool 20 and valve body 10 inwalls is shown in Fig. 1-2.

As further preferred version of the present invention: said valve body 10 is a hollow cylindrical, the axis of said spool 20 and valve body 10 dead in line settings, otch 21 and valve body 10 axes intersect settings on the spool 20.Can regard one-way valve integral body as and all constitute the symmetric type design this moment; Shown in Fig. 1-2; Because its otch 21 is positioned at valve body 10 middle parts; When no matter one-way valve was in unidirectional air inlet or oppositely by pressurized, above-mentioned symmetric type design can both well guarantee the stress balance property of the spool 20 whole conical surfaces, guarantees its reliable and stable in practical work process.

For further optimizing above-mentioned design; As shown in Figure 2; The tapered bottom end profile of said spool 20 is the ring that coincide with valve body 10 inwalls; The tapered tip of spool 20 is the straight line shape of vertical valve body 10 axis of length direction, and said spool 20 each bus are upwards postponed by its ring bottom and finally intersected at the straight line place of its conical upper, and said otch 21 overlaps with the straight line place.That is to say that its otch 21 profiles are straight line shape as shown in Figure 2; Otch 21 places of this moment have constituted unidirectional suction port truly; Compare other shapes; 21 its sensitivity of straight line shape otch and functional reliability are higher because spool 20 integral body draw and finally are concentrated to straight line shape otch 21 places in gradually by its bottom to its top, when its when receiving reverse cutoff pressure; Traditional pressure that is born by the monolithic valve is born by the conical surface of spool 20 simultaneously; The large-scale active path of its monolithic valve has then further all been assigned on straight line shape otch 21 circular cone on every side of spool 20, finally makes more reliable and stable of its equipment work, its longer service life.

Further; Considering the present invention in real work, is to rely on the interior tube chamber of its valve body 10 and automotive oil tank pipeline engage sleeves to fetch its concrete work that realizes, in order to prevent to receive the external force effect after one-way valve assembling or the assembling; Make the fuel tank pipeline get into valve body 10 depths; Thereby touch with spool 20 and to make its inefficacy, the present invention has adopted following solution: it is poroid that valve body 10 cavity shapes are ladder, and said spool 20 bottoms are fixed in small end end and its top of valve body 10 and point to valve body 10 set inside; The shoulder place 11, hole of said valve body 10 inner chambers and 21 at spool 20 top otch leave spacing, shown in Fig. 1-2.

Further, for ease of practical set, guarantee plugging into fast smoothly between automotive oil tank pipeline and valve body 10 big ends, chamfering 12 in said valve body 10 big end ends are provided with.

Further, for when guaranteeing its service behaviour, reducing its cost of production, the used material of said one-way valve is a rubber.

The present invention is through adopting cheap rubber as resilient support; Interference fit through between itself and fuel tank pipeline outer wall comes to be tightly connected at present, and simultaneously, the tiny action of its otch 21 side conical surfaces has promptly constituted the keying operation of one-way valve; React more sensitive; Equipment work is reliable and stable more, has avoided the generation of the fatigue damage phenomenon that the big the sphere of activities because of the monolithic valve causes, its longer service life; When the unidirectional air inlet of the present invention, otch 21 opens, and one-way valve is opened; Realize its air inlet function, through constantly in fuel tank, replenishing air, compensation is poor because of the fuel tank external and internal pressure that fuel tank inner chamber amount of gasoline reduces to produce; Finally make the fuel tank external and internal pressure equate, thereby avoided inhaling flat oil box; When fuel tank external and internal pressure difference was impartial, the conical surface of spool 20 received reverse cutoff pressure effect, and the conical surface that constitutes otch 21 is closed, thereby has prevented gasoline volatilization, and overall structure is simply slim and graceful, reliable and stable work.

Claims

1. one-way valve; Process by elastic material; Comprise tube chamber shape valve body (10) and be arranged at the spool (20) in the valve body (10); It is characterized in that: said spool (20) profile is hollow cone structure, and the conical upper of said spool (20) offers otch (21), affixed and formation integral structure between the tapered bottom end of said spool (20) and valve body (10) inwall.

2. one-way valve according to claim 1 is characterized in that: said valve body (10) is a hollow cylindrical, the axis of said spool (20) and valve body (10) dead in line, otch (21) on the spool (20) and valve body (10) axes intersect setting.

3. one-way valve according to claim 1 and 2; It is characterized in that: the tapered bottom end profile of said spool (20) is the ring that coincide with valve body (10) inwall; The tapered tip of spool (20) is the straight line shape of the vertical valve body of length direction (10) axis; Each bus of said spool (20) is upwards postponed by its ring bottom and is finally intersected at the straight line place of its conical upper, and said otch (21) overlaps with the straight line place.

4. one-way valve according to claim 3; It is characterized in that: it is poroid that said valve body (10) cavity shape is ladder; Said spool (20) bottom is fixed in small end end and its top of valve body (10) and points to valve body (10) set inside, leaves spacing between the shoulder place, hole (11) of said valve body (10) inner chamber and spool (20) top otch (21).

5. one-way valve according to claim 4 is characterized in that: said valve body (10) holds the end to be provided with interior chamfering (12) greatly.

6. one-way valve according to claim 5 is characterized in that: the used material of said one-way valve is a rubber.