CN210196569U

CN210196569U - Diaphragm type one-way valve

Info

Publication number: CN210196569U
Application number: CN201921238905.7U
Authority: CN
Inventors: Zhensheng Shen; 沈振声; Xiao Ji; 吉肖
Original assignee: Bold's Seal System (taicang) Co Ltd
Current assignee: Bold's Seal System (taicang) Co Ltd
Priority date: 2019-08-02
Filing date: 2019-08-02
Publication date: 2020-03-27
Anticipated expiration: 2029-08-02

Abstract

The utility model discloses a diaphragm type one-way valve, which comprises a rear shell, a front shell and a diaphragm, wherein the rear shell is connected with the front shell, the rear shell is provided with a fluid inlet, and the front shell is provided with a fluid outlet; the diaphragm is sleeved on the guide post, and the movement stroke of the diaphragm along the guide post can be limited by the limiting piece; when fluid passes through the fluid inlet, the membrane is separated from the sealing surface of the guide post fixing seat, and the fluid passes through; when the fluid stops flowing in, the membrane and the sealing surface of the guide post fixing seat form sealing. The utility model discloses constitute by back casing, procapsid and the three part of diaphragm, only need with the diaphragm install in the guide pillar of back casing, again with preceding, back casing equipment can, the part is few, reduces the equipment step, raises the efficiency reduce cost.

Description

Diaphragm type one-way valve

Technical Field

The utility model belongs to the technical field of the check valve, in particular to diaphragm formula check valve.

Background

The one-way valve is characterized in that fluid can only flow along the inlet, and the outlet medium cannot flow back. Check valves are also known as check valves or check valves. For preventing reverse flow of oil in hydraulic systems or for preventing reverse flow of compressed air in pneumatic systems. The diaphragm type one-way valve is an important one, has the advantages of simple structure, good sealing and corrosion resistance and small fluid resistance, is used for a medium with low pressure, low temperature and strong corrosivity and containing suspended substances, and can be applied to an automobile engine paint separator, an engine air supplementing structure, an engine crankcase and the like.

The diaphragm type check valve in the prior art comprises a front shell, a rear shell, a diaphragm and a gasket, the diaphragm needs to be installed on a guide post of the rear shell, the gasket is fixed on the guide post of the rear shell through hot riveting, the gasket is used for limiting the opening stroke of the diaphragm, and finally the front shell and the rear shell are welded.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the main technical problem who solves provides a diaphragm formula check valve, comprises back casing, procapsid and the three part of diaphragm, only needs to install the diaphragm in the guide pillar of back casing, again with preceding, back casing equipment can, the part is few, reduces the equipment step, raises the efficiency reduce cost.

In order to solve the technical problem, the utility model discloses a technical scheme be:

the utility model provides a diaphragm type one-way valve, which comprises a rear shell, a hollow front shell and a diaphragm positioned between the rear shell and the front shell, wherein the rear shell is connected with the front shell, the rear shell is provided with a fluid inlet, and the front shell is provided with a fluid outlet;

the diaphragm is sleeved on the guide post, and the movement stroke of the diaphragm along the guide post can be limited by the limiting piece;

when fluid passes through the fluid inlet, the membrane is separated from the sealing surface of the guide post fixing seat, and the fluid passes through; when the fluid stops flowing in, the membrane and the sealing surface of the guide post fixing seat form sealing.

In order to solve the technical problem, the utility model discloses a further technical scheme is: the connection mode between the rear shell and the front shell is welding, gluing or threaded connection.

Further, the rear housing and/or the front housing are injection molded parts; or the rear housing and/or the front housing are metal pieces.

Further, the rear shell and the front shell are both injection-molded parts, and the connection mode between the rear shell and the front shell is spin friction welding.

Furthermore, the limiting part comprises an annular sleeve and a connecting rib, the annular sleeve is sleeved on the guide post, and the annular sleeve is connected to the inner wall of the front shell through the connecting rib.

Further, the fluid outlet is a through hole formed in the guide post fixing seat.

Furthermore, the diaphragm type one-way valve is a one-way valve for an oil-gas separator of an automobile engine or a one-way valve for an air supply mechanism of the engine.

Further, the membrane is a rubber sheet, a plastic sheet or a metal sheet.

The utility model has the advantages that:

the utility model discloses a back casing, procapsid and diaphragm, the inner wall of procapsid has the locating part, and back casing has guide pillar and guide pillar fixing base, and through integrating the locating part in the procapsid, during the equipment, only need overlap the diaphragm in the guide pillar, again with preceding, the assembly of check valve can be realized to back casing equipment, compare in the traditional mode that adopts the packing ring (need rivet the packing ring hot in the casing in advance), the utility model discloses a component part of check valve is few, and reduce cost, through directly integrating the locating part on the procapsid, do not need the hot riveting technology in addition, reduce the input of hot riveting equipment, and reduction in production time improves production efficiency, reduces the cost of labor.

The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.

Drawings

Fig. 1 is an external view of the present invention;

fig. 2 is a schematic structural diagram of a front housing of the present invention;

FIG. 3 is an axial cross-sectional view taken along line A-A of FIG. 1;

fig. 4 is an exploded view of the present invention;

the parts in the drawings are marked as follows:

rear housing 1, procapsid 2, diaphragm 3, fluid inlet 4, fluid outlet 5, locating part 6, guide pillar 7, guide pillar fixing base 8, sealed face 9, splice bar 10.

Detailed Description

The following description is provided for illustrative embodiments of the present invention, and the advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure of the present invention. The present invention can also be implemented in other different ways, i.e. different modifications and changes can be made without departing from the scope of the present invention.

Example (b): a diaphragm type check valve, as shown in fig. 1 to 4, comprising a rear housing 1, a hollow front housing 2 and a diaphragm 3 between the rear housing and the front housing, the rear housing being connected to the front housing, the rear housing having a fluid inlet 4 and the front housing having a fluid outlet 5;

when fluid passes through the fluid inlet, the membrane is separated from the sealing surface 9 of the guide post fixing seat, and the fluid passes through; when the fluid stops flowing in, the membrane and the sealing surface of the guide post fixing seat form sealing.

The connection between the rear case and the front case is welding, gluing or screwing, but not limited thereto.

The rear housing and/or the front housing are injection molded parts; or the rear housing and/or the front housing are metal pieces.

In this embodiment, the rear housing and the front housing are both injection-molded parts, and the connection mode between the rear housing and the front housing is rotational friction welding.

In this embodiment, the limiting member includes an annular sleeve 11 and a connecting rib 10, the annular sleeve is sleeved on the guide post, and the annular sleeve is connected to the inner wall of the front housing through the connecting rib 10.

In this embodiment, the fluid outlet is a through hole formed in the guide post fixing seat.

The diaphragm type one-way valve is a one-way valve for an oil-gas separator of an automobile engine, but is not limited to the one-way valve, such as an engine gas supplementing mechanism, an engine oil return mechanism or an engine air inlet mechanism.

The membrane is a rubber sheet, a plastic sheet or a metal sheet, but is not limited thereto.

The utility model discloses a theory of operation and working process as follows:

when the check valve is assembled, the check valve can be assembled only by sleeving the diaphragm on the guide post and assembling the front shell and the rear shell, and when the front shell and the rear shell are injection-molded parts, the front shell and the rear shell can be connected by rotary friction welding, and can also be bonded by glue and the like; when fluid passes through the fluid inlet of the rear shell, the diaphragm is separated from the sealing surface of the guide post fixing seat under the action of the fluid, and the fluid passes through the fluid outlet of the front shell; when the fluid stops flowing in, the liquid in the front shell can enable the membrane to be attached to the sealing surface of the guide post fixing seat to form sealing, and the purpose that the fluid can only flow in a single direction is achieved.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same principle as the protection scope of the present invention.

Claims

1. A diaphragm formula check valve which characterized in that: the one-way valve comprises a rear housing (1) and a hollow front housing (2) connected thereto, the rear housing having a fluid inlet (4) and the front housing having a fluid outlet (5), and a diaphragm (3) between the rear housing and the front housing;

when fluid passes through the fluid inlet, the membrane is separated from the sealing surface (9) of the guide post fixing seat, and the fluid passes through; when the fluid stops flowing in, the membrane and the sealing surface of the guide post fixing seat form sealing.

2. The membrane check valve as defined in claim 1, wherein: the connection mode between the rear shell and the front shell is welding, gluing or threaded connection.

3. The membrane check valve as defined in claim 1, wherein: the rear housing and/or the front housing are injection molded parts; or the rear housing and/or the front housing are metal pieces.

4. The membrane check valve as defined in claim 1, wherein: the rear shell and the front shell are both injection-molded parts, and the connection mode between the rear shell and the front shell is rotational friction welding.

5. The membrane check valve as defined in claim 1, wherein: the limiting piece comprises an annular sleeve (11) and a connecting rib (10), the annular sleeve is sleeved on the guide post, and the annular sleeve is connected to the inner wall of the front shell through the connecting rib (10).

6. The membrane check valve as defined in claim 1, wherein: the fluid outlet is a through hole arranged on the guide post fixing seat.

7. The membrane check valve as defined in claim 1, wherein: the diaphragm type one-way valve is a one-way valve for an oil-gas separator of an automobile engine or a one-way valve for an air supplementing mechanism of the engine.

8. The membrane check valve as defined in claim 1, wherein: the diaphragm is a rubber sheet, a plastic sheet or a metal sheet.