CN217653299U

CN217653299U - Miniature check valve

Info

Publication number: CN217653299U
Application number: CN202220837207.4U
Authority: CN
Inventors: 周一夫
Original assignee: Guangzhou Beichen Mech And Electrical Equipment Co ltd
Current assignee: Guangzhou Beichen Mech And Electrical Equipment Co ltd
Priority date: 2022-04-12
Filing date: 2022-04-12
Publication date: 2022-10-25
Anticipated expiration: 2032-04-12

Abstract

The utility model discloses a micro one-way valve, which comprises a valve body and a valve core, wherein a cavity is arranged inside the valve body; the chamber consists of a first straight hole section, a conical hole section and a second straight hole section; the valve core is positioned in the cavity and consists of a first cylindrical section and a second cylindrical section; an annular boss is arranged on the first cylindrical section; a spring and a nut are sleeved on the second cylindrical section; one end of the second cylindrical section, which is far away from the first cylindrical section, is in a round-head inverted cone structure; and a first limiting part and a second limiting part are arranged on the inner wall of the first straight hole section. The utility model not only avoids the phenomenon that the valve core is blocked and does not return, improves the sensitivity and the sealing performance of the valve, but also effectively avoids the lateral deviation of the spring and the valve core when in work, and improves the coaxiality of the valve core when moving relative to the valve body; meanwhile, through the through hole formed in the nut, the flow area is increased, the eddy current is reduced, and the stability and the reliability of the check valve during working are greatly improved.

Description

Miniature check valve

Technical Field

The utility model relates to a check valve technical field especially relates to a miniature check valve.

Background

Prior art check valves, due to structural limitations, operate without compression or recovery of the resilient member along its axis, sometimes with lateral deflection. The uncertainty of the lateral deviation of the elastic element makes the one-way valve work unstably, and the phenomena of liquid leakage, air leakage, clamping and no return can be generated.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a miniature one-way valve, one end of a valve core is made to adopt a reversed cone structure with a round head, and a first limiting part consisting of a plurality of first baffles and a second limiting part consisting of a plurality of limiting ribs are arranged in a valve body, so that the phenomenon that the valve core is clamped and does not return is avoided, the sensitivity and the sealing performance of the valve are improved, the lateral deviation of a spring and the valve core during working is effectively avoided, and the coaxiality of the valve core relative to the valve body during movement is improved; meanwhile, through the through hole formed in the nut, the flow area is increased, the eddy current is reduced, and the stability and the reliability of the check valve during working are greatly improved.

In order to solve the above problem, the utility model discloses the technical scheme who adopts as follows:

a miniature one-way valve comprises a valve body and a valve core, and is characterized in that a cavity extending from a water inlet to a water outlet is arranged inside the valve body; the chamber consists of a first straight hole section, a conical hole section and a second straight hole section from top to bottom; the valve core is positioned in the cavity and consists of a first cylindrical section and a second cylindrical section from top to bottom; an annular boss is arranged at one end of the first cylindrical section, which is close to the second cylindrical section; a first annular clamping groove is formed between the second cylindrical section and the annular boss, and an O-shaped ring is arranged in the first annular clamping groove;

a spring and a nut are sequentially sleeved on the second cylindrical section in the direction far away from the annular boss; the nut is in threaded connection with the first straight hole section;

one end of the second cylindrical section, which is far away from the first cylindrical section, is in a round-head inverted cone structure;

and a first limiting part and a second limiting part are arranged on the inner wall of the first straight hole section.

Preferably, the first limiting part consists of two or more first baffles which are circumferentially distributed by taking the axis of the valve body as a center; the first baffle is positioned between the nut and the annular boss; the distance between the surface of the first baffle, far away from the inner wall of the first straight hole section, and the axis of the valve body is smaller than the outer diameter of the annular boss.

Preferably, the second limiting part is formed by two or more limiting ribs which are circumferentially distributed in an array by taking the axis of the valve body as the center; the limiting rib is positioned between the nut and the annular boss; the annular boss is provided with a sliding clamping groove at a position corresponding to the limiting rib; the limiting rib axially extends from one side of the nut and penetrates through the sliding clamping groove; when the valve core moves relative to the valve body, the valve core is connected with the limiting rib in a sliding mode through the sliding clamping groove in the annular boss.

Preferably, one side of the limiting rib, which is far away from the inner wall of the first cylindrical section, is close to the spring.

Preferably, a central hole is formed in the middle of the nut; the outer side of the central hole of the nut is provided with four or more through holes which are circumferentially distributed in an array mode by taking the axis of the nut as the center; one end of the first cylindrical section of the valve core, which is far away from the second cylindrical section, penetrates through the central hole.

Preferably, a flat gasket is arranged between the nut and the spring of the first cylindrical section; the flat gasket is fixedly connected with the nut.

Preferably, the valve body is arranged at the outer side of the water inlet and is provided with a second annular clamping groove at the outer side of the water outlet; and O-shaped rings are arranged on the second annular clamping grooves.

Preferably, the first cylindrical section and the second cylindrical section of the valve core are of an integral structure; the annular boss and the valve core are of an integral structure.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model discloses an through make one end of case adopt the back taper structure that is the button head to set up the first spacing portion that comprises a plurality of first baffles and the second spacing portion that comprises a plurality of spacing muscle in the valve body, not only avoided the case to block the phenomenon of not returning, promoted the sensitivity and the leakproofness of valve, effectively avoided spring and case during operation lateral deviation moreover, promoted the axiality when the relative valve body of case moves; meanwhile, through the through holes formed in the nuts, the water flow is increased and the eddy is reduced by increasing the flow area, and the stability and the reliability of the check valve during working are greatly improved.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 isbase:Sub>A schematic view of the cross-sectional structure A-A in FIG. 1;

FIG. 3 is a schematic view of a cross-sectional view B-B in FIG. 1;

FIG. 4 is a schematic view of the cross-sectional structure C-C of FIG. 1;

wherein: the valve comprises a valve body 1, a valve core 2, a cavity 3, an O-shaped ring 4, a spring 5, a nut 6, a first limiting part 7, a second limiting part 8, a first cylindrical section 21, a second cylindrical section 22, a first straight hole section 31, a tapered hole section 32, a second straight hole section 33, a central hole 61, a through hole 62, a first baffle plate 71, a limiting rib 81, a first annular clamping groove 100, a second annular clamping groove 200, an annular boss 212 and a sliding clamping groove 2120.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," "upper," "lower," "front," "rear," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The invention will be further described with reference to the accompanying drawings and specific embodiments:

as shown in fig. 1-4, a micro one-way valve comprises a valve body 1 and a valve core 2, and is characterized in that a chamber 3 extending from a water inlet to a water outlet is arranged inside the valve body 1; the chamber 3 is composed of a first straight hole section 31, a conical hole section 32 and a second straight hole section 33 from top to bottom; the valve core 2 is positioned in the cavity 3 and consists of a first cylindrical section 21 and a second cylindrical section 22 from top to bottom; one end of the first cylindrical section 21 close to the second cylindrical section 22 is provided with an annular boss 212; a first annular clamping groove 100 is formed between the second cylindrical section 22 and the annular boss 212, and an O-shaped ring 4 is arranged in the first annular clamping groove 100;

the second cylindrical section 22 is sequentially sleeved with a spring 5 and a nut 6 in the direction far away from the annular boss 212; the nut 6 is in threaded connection with the first straight hole section 31;

one end of the second cylindrical section 22 far away from the first cylindrical section 21 is in a round-head inverted cone structure;

the inner wall of the first straight hole section 31 is provided with a first limiting part 7 and a second limiting part 8.

In this embodiment, the one end that first cylinder section 21 was kept away from to second cylinder section 22 adopts the back taper structure setting that is the button head, has solved the problem that case 2 blocks and does not return when case 2 moves relative to valve body 1, promotes this check valve job stabilization nature and reliability.

Further, as shown in fig. 2 and 3, the first limiting portion 7 is composed of two or more first baffles 71 distributed circumferentially around the axis of the valve body 1; the first baffle 71 is positioned between the nut 6 and the annular boss 212; the distance between the surface of the first baffle 71 far away from the inner wall of the first straight-hole section 31 and the axis of the valve body 1 is smaller than the outer diameter of the annular boss 212.

In this embodiment, the first limiting portion 7 is used for limiting the upward movement distance of the valve core 2 relative to the valve body 1, so as to avoid that the valve core 2 is blocked inside the valve body 1 due to an excessive movement amplitude of the valve core 2 and an excessive reaction of the spring 5, thereby affecting the sensitivity of the valve; and prevent that the too big striking valve body 1 of case 2 reverse motion power causes O shape circle 4 to damage, influences the leakproofness.

Further, as shown in fig. 2 and 4, the second limiting portion 8 is formed by two or more limiting ribs 81 distributed in a circumferential array with the axis of the valve body 1 as the center; the limiting rib 81 is positioned between the nut 6 and the annular boss 212; a sliding clamping groove 2120 is formed in the position, corresponding to the limiting rib 81, of the annular boss 212; the limiting rib 81 axially extends from one side of the nut 6 and penetrates through the sliding clamping groove 2120; when the valve core 2 moves relative to the valve body 1, the valve core 2 is connected with the limiting rib 81 in a sliding mode through the sliding clamping groove 2120 on the annular boss 212.

In this embodiment, the second limiting portion 8 is used to limit the annular boss 212 from being laterally deviated and radially moved by the spring 5, so as to improve the coaxiality of the poppet 2 when moving up and down relative to the valve body 1, and improve the stability of the operation of the check valve.

Further, as shown in fig. 2 and 4, the side of the limiting rib 81 far away from the inner wall of the first cylindrical section 21 is close to the spring 5.

In this embodiment, the limiting rib 81 is arranged near the outer side of the spring 5, so that the amplitude of lateral deviation of the spring 5 when the spring is compressed or restored along the axis of the valve element 2 is reduced, the coaxiality of the valve element 2 relative to the valve body 1 during movement is further improved, and the working stability and reliability of the check valve are improved.

Further, as shown in fig. 3, a central hole 61 is formed in the middle of the nut 6; the nut 6 is provided with four or more through holes 62 distributed in a circumferential array by taking the axis of the nut 6 as the center on the outer side of the central hole 61; the end of the first cylindrical section 21 of the valve core 2 remote from the second cylindrical section 22 extends through the central bore 61.

In this embodiment, the through hole 62 is formed in the nut 6, so that the flow area of the corresponding position is increased, the flow rate of the flowing water flowing from the water inlet to the water outlet of the valve body 1 is increased, and the vortex flow is reduced.

Further, said first cylindrical section 21 is provided with a flat pad (not identified in the figures) between the nut 6 and the spring 5; the flat gasket is fixedly connected with the nut 6.

In the embodiment, the stability of the joint of the spring 5 and the nut 6 can be improved through the arrangement of the flat cushion, and the lateral deviation of the stress of the spring 5 when the spring is restored or compressed in the working process can be effectively prevented.

Further, as shown in fig. 1 and 4, a second annular clamping groove 200 is respectively arranged on the outer side of the water inlet and the outer side of the water outlet of the valve body 1; the second ring-shaped clamping grooves 200 are all provided with O-shaped rings 4.

Further, as shown in fig. 4, the first cylindrical section 21 and the second cylindrical section 22 of the valve core 2 are of an integral structure; the annular boss 212 and the valve core 2 are of an integral structure.

Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes are intended to fall within the scope of the present invention.

Claims

1. A miniature one-way valve comprises a valve body and a valve core, and is characterized in that a cavity extending from a water inlet to a water outlet is arranged inside the valve body; the chamber consists of a first straight hole section, a conical hole section and a second straight hole section from top to bottom; the valve core is positioned in the cavity and consists of a first cylindrical section and a second cylindrical section from top to bottom; one end of the first cylindrical section, which is close to the second cylindrical section, is provided with an annular boss; a first annular clamping groove is formed between the second cylindrical section and the annular boss, and an O-shaped ring is arranged in the first annular clamping groove;

2. The micro one-way valve according to claim 1, wherein the first limiting part is composed of two or more first baffles circumferentially arrayed around the axis of the valve body; the first baffle is positioned between the nut and the annular boss; the distance between the surface of the first baffle, far away from the inner wall of the first straight hole section, and the axis of the valve body is smaller than the outer diameter of the annular boss.

3. The micro one-way valve according to claim 1, wherein the second limiting portion is composed of two or more limiting ribs circumferentially arrayed around the axis of the valve body; the limiting rib is positioned between the nut and the annular boss; the annular boss is provided with a sliding clamping groove at a position corresponding to the limiting rib; the limiting rib axially extends from one side of the nut and penetrates through the sliding clamping groove; when the valve core moves relative to the valve body, the valve core is connected with the limiting rib in a sliding mode through the sliding clamping groove in the annular boss.

4. The miniature one-way valve according to claim 3, wherein the side of the limiting rib away from the inner wall of the first cylindrical section is close to the spring.

5. The miniature one-way valve according to claim 3, wherein a central hole is formed in the middle of the nut; the outer side of the central hole of the nut is provided with four or more through holes which are circumferentially distributed in an array mode by taking the axis of the nut as the center; one end, far away from the second cylindrical section, of the first cylindrical section of the valve core penetrates through the center hole.

6. The miniature one-way valve of claim 1, wherein a flat gasket is disposed between said nut and said spring of said first cylindrical section; the flat gasket is fixedly connected with the nut.

7. The miniature one-way valve according to claim 1, wherein the valve body is provided with a second annular clamping groove on the outer side of the water inlet and a second annular clamping groove on the outer side of the water outlet; and O-shaped rings are arranged on the second annular clamping grooves.

8. The miniature one-way valve according to claim 1, wherein the first cylindrical section and the second cylindrical section of the valve core are of an integral structure; the annular boss and the valve core are of an integral structure.