CN210196560U

CN210196560U - One-way valve

Info

Publication number: CN210196560U
Application number: CN201920891307.3U
Authority: CN
Inventors: Inventor Has Waived The Right To Be Mentioned The; 不公告发明人
Original assignee: Zhejiang Sanhua Climate and Appliance Controls Group Co Ltd
Current assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Priority date: 2019-06-14
Filing date: 2019-06-14
Publication date: 2020-03-27
Anticipated expiration: 2029-06-14

Abstract

The utility model discloses a check valve, including valve body, disk seat and case spare, the case spare with the valve port of disk seat cooperatees, still includes the restriction piece, the restriction piece includes basal portion and restriction portion, and restriction portion includes first bulge and second bulge, first bulge follows the basal portion of restriction portion is inwards protruding and is followed the axial extension of restriction piece, first bulge can restrict the radial displacement of case spare, the second bulge is followed the basal portion of restriction portion is inwards protruding, the case spare can the butt the second bulge, the utility model provides a check valve can improve the gliding stationarity of case spare.

Description

One-way valve

Technical Field

The utility model belongs to the technical field of fluid control, concretely relates to check valve.

Background

A check valve is commonly used in a flow path control system, and a patent publication No. CN102563138A discloses a check valve shown in fig. 1, which includes a valve body 1, a valve housing 2, a magnet 3, a diaphragm 4, a baffle bowl 5, and a strainer 6. In the technical scheme, the retaining bowl 5 is approximately cylindrical, through holes for fluid circulation are formed in the circumference of a bowl cover body of the retaining bowl 5 at intervals, and the diaphragm 4 is arranged in an inner cavity of the bowl cover body and can move axially. Under the combined action of the pressure of the inlet fluid and the magnetic force of the magnet 3, the diaphragm 4 can abut against or be far away from the valve sleeve 2 to realize the function of a one-way valve opening.

Because of the flow path system, the inlet fluid of the check valve may have a turbulent phenomenon, so how to reduce the impact of the turbulent flow on the diaphragm and improve the smoothness of the diaphragm sliding of the check valve is a technical problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model provides a one-way valve, which comprises a valve body, a valve seat and a valve core piece, wherein the valve body comprises a flow path inlet end and a flow path outlet end, the valve seat is fixedly connected with the valve body, the valve core piece is positioned in the valve cavity of the one-way valve, the valve also comprises a limiting piece, the restricting member includes a base portion and two or more restricting portions each extending axially from an outer peripheral portion of the base portion, the restricting portion includes a first projecting portion projecting inward from a base portion of the restricting portion and extending in an axial direction of the restricting member so that the spool member can slide relative to the first projecting portion, the first projecting portion is capable of restricting radial displacement of the spool member, the second projecting portion projects inward from a base portion of the restricting portion, the valve core piece can abut against the second protruding portion to limit axial displacement of the valve core piece on the side away from the valve port of the one-way valve.

The utility model provides a check valve through set up first bulge and second bulge on the restriction piece. The first protruding part can limit the radial displacement of the valve core piece, and the second protruding part can limit the axial displacement of the side, far away from the valve port, of the valve core piece, so that the impact of turbulent flow on the valve core piece is reduced.

Drawings

FIG. 1: a schematic structure of a check valve used in the background art;

FIG. 2A: the utility model provides a structure schematic diagram of a one-way valve (valve closing state);

FIG. 2B: FIG. 2A is a schematic view of the structure of the check valve (fully open state);

FIG. 3: FIG. 2A is a schematic view of the configuration of a restriction used in the one-way valve;

FIG. 4: the utility model provides a structural schematic of another kind of restriction piece.

Notation and illustration in fig. 2A-4:

10-a valve body;

11-a valve cavity;

12-flow path inlet end, 13-flow path outlet end;

14-first indentation, 15-second indentation;

16-an inner wall portion;

20-a valve seat;

21-valve port, 22-flow passage hole and 23-ring groove;

30-a valve core piece;

31-outer edge, 32-end;

40/40A-limiter;

41-a base portion;

411-ring part, 412-plate part;

413-an outer peripheral portion;

414-first fluid channel, 415-second fluid channel;

416-inflow section, 417-outflow section;

42/42A-a restriction;

421-base/tendon;

422-a first projection;

423-bar-shaped convex marks;

424/424A-a second projection;

425-bending part, 426-step part;

427-an intermediate space;

50-a magnet piece;

60-filter element.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. The upper and lower terms used herein are defined by the positions of the components shown in the drawings, and are used for clarity and convenience of the technical solution, and it should be understood that the terms used herein should not be construed as limiting the scope of the claims.

Fig. 2A is a schematic structural diagram of a check valve (in a closed state), fig. 2B is a schematic structural diagram of the check valve (in a fully open state), and fig. 3 is a schematic structural diagram of a limiting member used in fig. 2A.

As shown in fig. 2A, 2B, and 3. The utility model provides a check valve mainly includes valve body 10, disk seat 20 and case spare 30.

The valve body 10 is generally cylindrical and is formed by rolling or drawing a metal tube and includes a flow path inlet end 12 and a flow path outlet end 13. The valve body 10 is formed with inwardly projecting annular first indentations 14 and annular second indentations 15 in the inner wall 16 by a rolling process. It will of course be appreciated that a point-like or straight indentation may also be formed in the inner wall portion 16 by dotting.

The valve seat 20 is substantially of a cylindrical metal structure, and a flow passage hole 22 is opened in the middle. The valve seat 20 has an annular groove 23 in an outer edge portion thereof, and the valve seat 20 is fixed to the inner wall portion 16 of the valve body 10 by the annular groove 23 engaging with the annular second indentation 15.

In this embodiment, a magnet member 50 and a filter member 60 are further included, the filter member 60 is fixed to the side of the valve seat 20 facing the fluid inlet end, and the magnet member 50 is fixed to the inner wall portion of the flow passage hole 22 of the valve seat 20.

In the present embodiment, the restricting member 40 is made of a metal plate material by stamping, and includes a base portion 41 and a restricting portion 42.

The base portion 41 includes an annular portion 411 having a certain width in the axial direction, and a plate portion 412 formed to extend inward from the annular portion 411. The central through hole of the plate portion 412 serves as a first fluid passage 414. The restriction member 40 abuts against the first indentation 14 of the valve body 10 through the annular portion 411.

The restricting portions 42 are three in number, and have a rib portion 421 formed to extend from the annular portion 411 in the axial direction of the restricting member 40, with the rib portion 421 serving as a base. An axial rib mark 423 is formed inward by pressing in each rib portion 421, and the rib mark 423 serves as the first projecting portion 422. Meanwhile, in the present embodiment, bent portions 425 are formed by bending inward on both sides of each bead portion 421, and the bent portions 425 serve as the second projecting portions 424.

The restricting member 40 includes an intermediate space 427 defined by each restricting portion 42 toward the central axis of the restricting member 40. Specifically, in the present embodiment, the intermediate space 427 is one axially substantially circular space defined in the middle of the strip-shaped convex mark 423 on the three bead portions 421. The core member 30 is embodied as a diaphragm and is located in the intermediate space 427. The wall surface of the rib 423 engages with the outer edge portion 31 of the diaphragm to restrict the radial displacement of the spool member 30. Meanwhile, the end of the bent portion 425 is engaged with the end 32 of the valve core member 30, so as to limit the axial displacement of the valve core member 30 away from the valve port 21.

In the present embodiment, as a preferable mode, the length h of the strip-shaped convex mark 423 in the axial direction of the restriction member 40 is larger than the movement stroke of the diaphragm in the axial direction of the restriction member 40, and a reliable radial restriction function can be performed.

In the present embodiment, three bead portions 421 are symmetrically distributed in the circumferential direction, and the space between two adjacent bead portions 421 in the circumferential direction of the restriction member 40 serves as the second fluid passage 415. It will be appreciated that in this embodiment, the second fluid passage 415 comprises the sum of three spaces.

When the check valve is in a fully open valve state (i.e., under the pressure of the fluid, the valve core member 30 (diaphragm) overcomes the magnetic force of the magnet member 50 and abuts against the bent portion 425 away from the valve port, see fig. 2A), the second fluid passage 415 is divided into an inflow section 416 and an outflow section 417 by the diaphragm. The inflow section 416 is the side of the membrane facing the flow path inlet end 12, and the outflow section 417 is the side of the membrane facing the flow path outlet end 13. The fluid flow path is: flow path inlet end 12-valve port 21-second fluid passageway 415 (inflow segment 416-outflow segment 417) -first fluid passageway 414-flow path outlet end 13.

When the check valve is in the fully open state, in order to reduce the flow resistance influence of the check valve and improve the sensitivity, it is desirable that the equivalent flow area of the fluid at the valve port 21 is the minimum (it can be understood that the numerical value of the "equivalent flow area" reflects the flow capacity of the fluid in different flow sections). Namely, the following conditions are satisfied:

the fluid equivalent flow area of the inflow section 416 (the sum of the three flow passages in this embodiment) is larger than the fluid equivalent flow area at the valve port 21;

the fluid equivalent flow area of the outflow section 417 (which is the sum of the three flow passages in this embodiment) is larger than the fluid equivalent flow area at the valve port 21;

the fluid equivalent flow area of the first fluid passage is larger than the fluid equivalent flow area at the valve port 21.

In the above embodiment, three restricting portions 42 are provided, but it is understood that two or four restricting portions may be provided. As long as it is effective to limit the radial displacement of the core member 30. Three or four are generally preferred, and if too many are provided, the flow area of the second fluid passage 415 will be relatively reduced.

Fig. 4 is a schematic structural diagram of another limiting member according to the present invention.

As shown in fig. 4. The difference from the foregoing embodiment is that the restricting portion 42A of the restricting member 40A is a bead portion 421 extending in the axial direction from the annular portion 411. An axial rib mark 423 is formed inward by pressing in each rib portion 421, and the rib mark 423 serves as the first projecting portion 422. Meanwhile, the plate rib portion 421 has a step portion 426 formed by inward punching, the step portion 426 is located below the strip-shaped convex mark 423, and the step portion 426 serves as a second protruding portion 424A.

The technical scheme can also achieve the same beneficial effects of the technical scheme, and the detailed description is omitted. Also, it will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the principles of the invention, and such modifications and enhancements are intended to be included within the scope of the invention.

Claims

1. A check valve comprises a valve body, a valve seat and a valve core piece, wherein the valve body comprises a flow path inlet end and a flow path outlet end, the valve seat is fixedly connected with the valve body, the valve core piece is positioned in a valve cavity of the check valve, and the check valve is characterized in that,

the valve body further comprises a limiting piece, the limiting piece comprises a base portion and more than two limiting portions, each limiting portion extends axially from the outer peripheral portion of the base portion, each limiting portion comprises a first protruding portion and a second protruding portion, the first protruding portion protrudes inwards from the base portion of the limiting portion and extends in the axial direction of the limiting piece, the valve body can slide relative to the first protruding portion, the first protruding portion can limit radial displacement of the valve body, the second protruding portion protrudes inwards from the base portion of the limiting portion, and the valve body can abut against the second protruding portion to limit axial displacement of the valve body on the side far away from the valve port of the one-way valve.

2. The check valve of claim 1, wherein the base portion includes an annular portion and a plate portion extending inwardly from the annular portion, the restriction portion extending from the annular portion in an axial direction of the restriction member, the plate portion having a first fluid passage.

3. The check valve as in claim 2, wherein said restriction is stamped and formed of sheet metal, said restriction including a web portion including an inwardly projecting rib as said first projection.

4. The check valve as in claim 3, wherein said restriction comprises a bent portion formed by bending inward from both sides of said bead portion, said bent portion serving as said second projection.

5. The check valve of claim 3, wherein the restriction includes a step punched inward from the web, the step being located below the strip-shaped projection, the step serving as the second projection.

6. The check valve as claimed in claim 4 or 5, wherein the core member is embodied as a diaphragm, and the axial length of the bar-shaped projection is greater than the stroke of the axial movement of the diaphragm.

7. The check valve according to any one of claims 2 to 5, wherein the valve core member is a diaphragm, three or four of the restricting portions are symmetrically arranged in a circumferential direction of the restricting member, and a space between two adjacent restricting portions in the circumferential direction of the restricting member serves as a second fluid passage defined in a fully open state of the check valve, the second fluid passage being located on a side of the diaphragm facing the inlet end of the flow path as an inflow section, and the second fluid passage being located on a side of the diaphragm facing the outlet end of the flow path as an outflow section, and the following conditions are satisfied: in the full-open valve state of the one-way valve, the fluid equivalent flow area of the inflow section is larger than that of the valve port; the fluid equivalent flow area of the outflow section is larger than that of the valve port; the fluid equivalent flow area of the first fluid passageway is greater than the fluid equivalent flow area at the valve port.

8. The check valve as claimed in any one of claims 2 to 5, wherein said valve body is made of a metal material by rolling or drawing, an inner wall portion of said valve body includes a first indentation and a second indentation, and an annular portion of said restricting portion abuts against said first indentation and said second indentation is press-fitted to an outer peripheral portion of said valve seat.