CN210123031U

CN210123031U - Check valve and mounting structure thereof

Info

Publication number: CN210123031U
Application number: CN201920297919.XU
Authority: CN
Inventors: 李志军; 余剑; 陈绪学
Original assignee: Zhejiang YAT Electrical Appliance Co Ltd
Current assignee: Zhejiang YAT Electrical Appliance Co Ltd
Priority date: 2019-03-08
Filing date: 2019-03-08
Publication date: 2020-03-03
Anticipated expiration: 2029-03-08

Abstract

The utility model discloses a check valve and mounting structure thereof, including two piece at least lamella, the lamella concatenation forms inclosed arc wall, extrudees each other between the lamella when the outer convex surface pressure of arc wall is greater than interior concave surface pressure, and the lamella separates when the outer convex surface pressure of arc wall is less than interior concave surface pressure. Under the condition that the valve flaps are sealed, the arc-shaped wall can form barriers on two sides of the one-way valve, so that the pressures on the two sides are different. Taking being applied to the oil tank as an example, arc wall inboard and atmosphere intercommunication under the airtight condition of arc wall, arc wall outside and the inside intercommunication of oil tank, carry out the separation through the airtight arc wall that the lamella formed between inside and the atmosphere of oil tank. Oil consumes gradually in the oil tank, forms the negative pressure in the arc wall outside gradually, and the arc wall is inboard to form the malleation, and the lamella receives the adjacent lamella of atmospheric action and can separate gradually and produce the space for the arc wall breaks and opens, makes check valve both sides intercommunication, and the oil tank internal pressure is the same with the atmosphere, so that mend oil.

Description

Check valve and mounting structure thereof

[ technical field ] A method for producing a semiconductor device

The utility model relates to a check valve and mounting structure thereof belongs to the check valve field.

[ background of the invention ]

At present, all the fuel oil and engine oil tank pressure balancing devices of small-sized general gasoline engines for garden engine tools at home and abroad adopt flat nozzle type one-way valves, and the small-sized general gasoline engine has the advantages of simple structure and low cost. However, the check valve hardly meets the two-way performance requirements of quick air supply at negative pressure and oil tightness at positive pressure, namely: when the air replenishing function is normal under negative pressure, oil is easy to leak from the air inlet of the one-way valve; the one-way valve with good sealing effect has poor air supply function under negative pressure, and even fails to work.

The brush cutter of Makita in Japan is provided with two check valves on one oil tank to improve the qualification probability of the balancing device, so that the quality of the rubber flat nozzle type check valve is high in unreliability degree.

[ Utility model ] content

The utility model aims to solve the technical problem that overcome prior art not enough and provide a simple structure, low cost, bidirectional performance is reliable check valve and mounting structure together.

Solve the technical problem, the utility model discloses a following technical scheme:

the utility model provides a check valve, includes two piece at least lamella, and the lamella concatenation forms inclosed arc wall, extrudees each other between the lamella when the outer convex pressure of arc wall is greater than interior concave pressure, and the lamella separates when the outer convex pressure of arc wall is less than interior concave pressure.

The utility model has the advantages that:

under the condition that the valve flaps are sealed, the arc-shaped wall can form barriers on two sides of the one-way valve, so that the pressures on the two sides are different. Taking being applied to the oil tank as an example, arc wall inboard and atmosphere intercommunication under the airtight condition of arc wall, arc wall outside and the inside intercommunication of oil tank, carry out the separation through the airtight arc wall that the lamella formed between inside and the atmosphere of oil tank. Oil consumes gradually in the oil tank, forms the negative pressure in the arc wall outside gradually, and the arc wall is inboard to form the malleation, and the lamella receives the adjacent lamella of atmospheric action and can separate gradually and produce the space for the arc wall breaks and opens, makes check valve both sides intercommunication, and the oil tank internal pressure is the same with the atmosphere, so that mend oil. And when being malleation or oil tank upset in the oil tank, lead to the diaphragm to produce deformation trend towards atmosphere one side, because the reason of diaphragm arc structure, can produce the extrusion between the adjacent diaphragm to the deformation of suppression diaphragm, make between the diaphragm can not or produce few clearance, in order to avoid or restrain oil from flowing out from the check valve. The purpose of unidirectional conduction is realized through the process.

The edge of arc wall outwards extends and forms the turn-ups.

Three lamella are no less than to lamella quantity, and when the arc wall was airtight, the tip of all lamella was located same a bit.

The thickness of the valve is gradually increased from the end of the valve.

A mounting structure of a check valve comprises a valve seat and the check valve mounted on the valve seat.

Be provided with on the disk seat and carry out spacing support to the lamella, the support is located the arc wall inboard.

Mounting structure of check valve is still including setting up in the lid in the arc wall outside, has seted up the buffer hole on the lid.

The edge of arc wall outwards extends and forms the turn-ups, and the lid is pressed the turn-ups on the disk seat.

The inboard and the atmosphere intercommunication of arc wall, the outside intercommunication of arc wall is inside the oil tank.

Other features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.

[ description of the drawings ]

The invention will be further explained with reference to the drawings:

fig. 1 is a schematic front sectional view of a check valve according to an embodiment of the present invention;

fig. 2 is a schematic sectional view of an installation structure of a check valve according to an embodiment of the present invention;

fig. 3 is an explosion diagram of the mounting structure of the check valve according to the embodiment of the present invention.

[ detailed description ] embodiments

The technical solutions of the embodiments of the present invention are explained and explained below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the embodiment, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.

In the following description, the appearances of the indicating orientation or positional relationship, such as the terms "inner", "outer", "upper", "lower", "left", "right", etc., are only for convenience in describing the embodiments and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

Example (b):

referring to fig. 1-3, the present embodiment provides a mounting structure of a check valve, including a cover 1, a valve seat 2, and a check valve 3 mounted on the valve seat 2, wherein the cover 1 covers the check valve 3. In this embodiment, the check valve 3 is installed on the oil tank, wherein the valve seat 2 is installed on the shell of the oil tank, the cover 1 is located in the oil tank, and the outside of the oil tank is communicated with the atmosphere. Use check valve 3 as the boundary, distinguish inside the oil tank, switch on when check valve 3, the oil tank communicates with the atmosphere, can mend oil to the oil tank is inside, closes when check valve 3, and the oil tank is inside isolated with the atmosphere, and oil in the oil tank can't spill over.

Wherein the one-way valve 3 comprises at least two petals 31, and the opening and closing of the one-way valve 3 are realized by the opening and closing of the petals 31. When no obvious pressure difference exists between the inside of the oil tank and the atmosphere and oil in the oil tank does not flow back to the membrane 31, the edges of the adjacent membranes 31 are attached to each other, the membrane 31 is spliced to form a closed arc-shaped wall, particularly, the arc-shaped wall is formed at the splicing position of the adjacent membranes 31, and the curvature center of the arc-shaped wall is positioned on the atmosphere side. The outside of arc wall is inside the oil tank in corresponding this embodiment promptly, and the one side that the arc wall is located the oil tank is outer convex surface 33, and the inboard of arc wall is atmospheric one side promptly, and the one side that the arc wall is located atmospheric is interior concave surface 32. While the choice of the shape of the curved wall includes, but is not limited to, circular arcs and elliptical arcs.

Since the petals 31 are spliced to form an arc-shaped wall, the petals 31 constituting the arc-shaped wall are all part of the arc-shaped wall, and the curvature center of any petal 31 is located on the atmosphere side. Oil when in the oil tank lasts the consumption, and the air can reduce gradually in the oil tank, and atmospheric pressure in the oil tank also can reduce gradually, forms the negative pressure gradually for atmosphere, and the outer convex surface 33 pressure of arc wall is less than interior concave surface 32 pressure, and diaphragm 31 is towards the inside deformation of oil tank and mutual separation gradually, can supply the inside fuel feeding of oil tank from the oil tank outside through the space between the diaphragm 31 this moment. When the temperature is too high in the oil tank, lead to the oil tank internal pressure to be greater than atmospheric pressure and form the malleation, perhaps the oil tank upset again, lead to fluid to fall on outer convex surface 33, make outer convex surface 33 pressure be greater than interior concave surface 32 pressure, because the arc structure of lamella 31, adjacent lamella 31 can produce mutual extrusion on the contact surface between it, with the self deformation of restraining or reducing lamella 31, can not produce or only produce minimum clearance between the corresponding lamella 31, thereby avoid or restrain fluid and spill from check valve 3. The purpose of one-way conduction of the one-way valve is realized through the process.

In addition, when the oil in the oil tank is poured on the outer convex surface 33, in order to reduce the load on the diaphragm 31, reduce the impact of the oil on the diaphragm 31, and reduce the possibility of the occurrence of a gap in the diaphragm 31, the cap 1 of the present embodiment is provided with the buffer hole 11 to buffer the oil flowing on the diaphragm 31 without affecting the entry and exit of the oil. The buffer hole 11 does not obstruct when the flap 31 is opened to supply oil into the tank. The shape of the buffer hole 11 includes, but is not limited to, a circle and a square.

The flap 31 is easy to manufacture by simply selecting an arcuate rubber cover and cutting the arcuate portion. If the number of petals 31 is two, only one cutting is needed, and if three, only three or two cutting is needed, and so on. For example, in the present embodiment, the number of the petals 31 is four, and the ends of the four petals 31 are located at the same point in the case where the petals 31 are attached to each other and closed, so that only a cross-cut needs to be performed on one hemispherical rubber cover. Material loss during cutting should be avoided as much as possible to avoid gaps between the flaps 31 in the closed state, for which reason the number of flaps 31 should not be too large. In addition, the excessive number of the valve flaps 31 can also reduce the mutual extrusion force among the valve flaps 31 when the fuel tank is pressurized, and the anti-concave capacity of the valve flaps 31 is reduced. However, when the pressure in the oil tank is negative, the number of the flaps 31 is too small, so that gaps formed by the outward protrusions of the flaps 31 are too small, and the oil supplementing efficiency is affected. Considering the manufacturing cost, the manufacturing efficiency and the actual using effect of the product, the scheme of forming the four petals 31 by cross cutting in the embodiment is optimized.

Meanwhile, in order to avoid the situation that the pressure in the oil tank is too strong and the pressure between the valve flaps 31 is overcome to cause the one-way valve 3 to be opened accidentally, in the embodiment, the valve seat 2 is further provided with the support 21 for limiting the valve flaps 31, the support 21 is positioned on the inner side of the arc-shaped wall, and the support 21 is close to or attached to the inner concave surface 32 in a closed state. Meanwhile, the support 21 can be a multi-edge support, or can be a four-edge support with the number opposite to that of the petals 31, each edge limits one of the petals 31, and the multi-edge support does not influence oil supplement.

Further, the thickness of the flap 31 gradually increases outward from the end of the flap 31. The thickness of the flap 31 is correspondingly minimized in this embodiment where the centers of the convex outer surface 33 and the concave inner surface 32 are opposite to each other, and then the thickness of the flap 31 gradually increases from the center of the arc-shaped wall outward. The thicker the petals 31, the greater the mutual compression force that can be generated between the petals 31, and by this structure the size of the opening that can be formed in the center of the arcuate wall is limited.

In addition, in order to be able to stably mount the check valve 3 and simultaneously facilitate the disassembly and replacement of the check valve 3, in the embodiment, the edge of the arc-shaped wall extends outwards to form a flange 34, and the cover body 1 presses the flange 34 on the valve seat 2 and is assembled through the bayonet coupling of the pin, so as to realize the mounting of the check valve 3.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.

Claims

1. A one-way valve characterized by: the membrane comprises at least two membrane flaps which are spliced to form a closed arc-shaped wall, the membrane flaps are mutually extruded when the outer convex surface pressure of the arc-shaped wall is greater than the inner concave surface pressure, and the membrane flaps are separated when the outer convex surface pressure of the arc-shaped wall is less than the inner concave surface pressure.

2. The one-way valve of claim 1, wherein: the edge of the arc-shaped wall extends outwards to form a flanging.

3. The one-way valve of claim 1, wherein: the number of the petals is not less than three, and when the arc-shaped wall is closed, the end parts of all the petals are positioned at the same point.

4. The one-way valve of claim 3, wherein: the thickness of the flap gradually increases from the end of the flap outwardly.

5. The utility model provides a mounting structure of check valve which characterized in that: comprising a valve seat and a one-way valve according to claim 1 or 2 or 3 or 4 mounted on the valve seat.

6. The mounting structure of a check valve according to claim 5, wherein: the valve seat is provided with a support for limiting the valve flap, and the support is positioned on the inner side of the arc-shaped wall.

7. The mounting structure of a check valve according to claim 5, wherein: the mounting structure of the one-way valve further comprises a cover body arranged on the outer side of the arc-shaped wall, and a buffer hole is formed in the cover body.

8. The mounting structure of a check valve according to claim 7, wherein: the edge of the arc-shaped wall extends outwards to form a flanging, and the flanging is pressed on the valve seat by the cover body.

9. The mounting structure of a check valve according to claim 5, wherein: the inner side of the arc-shaped wall is communicated with the atmosphere, and the outer side of the arc-shaped wall is communicated to the inside of the oil tank.