CN216923330U

CN216923330U - Non return assembly and solenoid valve

Info

Publication number: CN216923330U
Application number: CN202220540210.XU
Authority: CN
Inventors: 张建明
Original assignee: Jiangmen Tiandi Electrical Appliance Co ltd
Current assignee: Hanyu Group JSCL
Priority date: 2022-03-14
Filing date: 2022-03-14
Publication date: 2022-07-08
Anticipated expiration: 2032-03-14

Abstract

The utility model provides a check assembly, comprising: the base is provided with a bottom and a surrounding edge surrounding the periphery of the bottom, and the bottom is provided with a plurality of first water outlet holes which are axially communicated; the valve clack is an elastic body, and comprises a diaphragm with a spherical surface and a limiting column which is formed by axially protruding and extending the center of the diaphragm; the gland is provided with a disc-shaped main body part, and the main body part is provided with a plurality of second water outlet holes which axially penetrate through; the base and the gland are concentrically fixed in an opposite mode, and the valve clack is limited in the axial direction and the radial direction by the base and the gland and is clamped and fixed in a cavity formed by the gland and the base in an opposite surrounding mode. The solenoid valve that is equipped with above-mentioned non return assembly is still provided. The valve clack is axially clamped and fixed in the cavity in an interference connection mode, automatic assembly is facilitated, and production efficiency of products is improved. And the conditions that the diaphragm is deformed greatly under a high water pressure state for a long time to cause elastic fatigue, cannot reset and the like to influence the reliability can be prevented.

Description

Non return assembly and solenoid valve

Technical Field

The utility model belongs to the field of check assemblies and electromagnetic valves, and particularly relates to a diaphragm cutting assembly, wherein IPC (International Process control) classes belong to F16K 15/14 and F16K 27/02.

Background

The check assembly is a valve which automatically prevents medium from flowing backwards through the opening and closing piece by medium acting force. In the prior art, as disclosed in chinese utility model patent CN213451893U, an automatic opening/closing and backflow prevention of a valve are realized by using elastic deformation of a diaphragm and changing the elastic deformation state by means of a liquid acting force, and the diaphragm passes through a mounting hole in an interference manner and is clamped in the mounting hole to realize the installation and fixation of a valve flap diaphragm, which is not beneficial to automatic assembly and reduces the production efficiency of a product; on the other hand, the deformation of the diaphragm in the opening direction of the valve is not limited, the diaphragm is easy to damage, and the reliability of the product is reduced.

With regard to terms and knowledge, see, except as specified in this specification, the "IEC electronic and Electrical Standard terminology dictionary" (1 st edition of Chinese Standard Press 1992), "Electrical apparatus manufacturing technology" (1 st edition of mechanical industry Press 1982), "mechanical engineering Manual", and "Motor engineering Manual" (1 st edition of mechanical industry Press 1978 and 2 nd edition of 1997), and the national Standard GB/T21465-2008 "valve terminology".

Disclosure of Invention

In order to solve the above technical problem, the present invention provides a check assembly, including:

the base is provided with a bottom and a surrounding edge surrounding the periphery of the bottom, and the bottom is provided with a plurality of first water outlet holes which are axially communicated;

the valve clack is an elastic body, and comprises a diaphragm with a spherical surface and a limiting column which is formed by axially protruding and extending the center of the diaphragm;

the gland is provided with a disc-shaped main body part, and the main body part is provided with a plurality of second water outlet holes which axially penetrate through;

the base and the gland are concentrically fixed in a facing manner, and the valve clack is limited in the axial direction and the radial direction by the base and the gland and is clamped and fixed in a cavity formed by the facing of the gland and the base in an axial direction;

when liquid flows from the side where the gland is located to the direction of the base, the diaphragm is in a first state, the diaphragm is separated from the main body part and attached to the bottom, and the second water outlet hole and the first water outlet hole form a channel for liquid to flow out; when liquid flows from the side where the base is located to the direction of the pressing cover, the diaphragm is in the second state, the diaphragm is attached to the main body portion to seal the second water outlet hole, and the liquid is prevented from flowing out of the second water outlet hole through the first water outlet hole.

The valve clack is forced to be fixed in the cavity by the axial and radial limiting clamps in an interference connection mode, a fixing mode that the soft elastic piece penetrates through the mounting hole in an interference mode is not needed, automatic assembly is facilitated, and production efficiency of products is improved. And because the axial clearance of cavity is not big, the reverse elastic deformation of diaphragm can be by the preceding terminal surface bearing of bottom and control the deflection too big, prevents that the diaphragm from appearing elastic fatigue because of the deformation is great under the high water pressure state for a long time, the condition that influences the reliability appears such as can not reset.

Furthermore, the bottom center is recessed to form a limiting groove, and the limiting column is installed in the limiting groove in a matched mode to limit radial displacement of the valve clack.

Preferably, the limiting column is hollow to form a first through hole, the main body part of the gland) protrudes from the center to form a columnar positioning column, and the positioning column is sleeved on the first through hole to limit the radial displacement of the valve flap.

Preferably, the limiting column is hollow to form a second groove, a protruding portion is arranged in the center of the main body portion of the gland, and the protruding portion is fittingly sleeved in the second groove to limit radial displacement of the valve clack.

Preferably, the inner wall of surrounding edge radially caves in and forms annular spacing groove, and spacing groove front end arch forms annular screens, screens and the periphery joint of gland with spacing fixed gland.

Preferably, the tail end of the positioning column is provided with a clamping part, the center of the bottom is provided with a second through hole, and the clamping part penetrates through the back face of the clamping bottom of the second through hole to limit and fix the gland.

Preferably, the periphery of the chamber is provided with an annular elastic sealing gasket, and the sealing gasket is pressed and fixed by the base and the gland in the axial direction. It is possible to prevent the liquid from leaking backward from the outer circumference of the gland 30 when the liquid flows backward.

An electromagnetic valve comprises a water inlet pipeline, and any one of the check assemblies is fixed in the water inlet pipeline. Therefore, the beneficial effects of the check assembly are achieved.

Drawings

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

FIG. 2 is a cross-sectional view of embodiment 1 of the check assembly of the present invention in a reverse flow state of liquid;

FIG. 3 is a cross-sectional view of embodiment 1 of the check assembly of the present invention in a forward flow condition of liquid;

FIG. 4 is a perspective view of the base of check assembly embodiment 1 of the present invention;

FIG. 5 is a perspective view of the diaphragm of embodiment 1 of the check assembly of the present invention;

FIG. 6 is a perspective view of a gland of embodiment 1 of the check assembly of the present invention;

FIG. 7 is an axial cross-sectional view of embodiment 2 of the check assembly of the present invention;

FIG. 8 is an axial cross-sectional view of embodiment 3 of the check assembly of the present invention;

FIG. 9 is a perspective view of the diaphragm of embodiment 3 of the check assembly of the present invention;

FIG. 10 is an axial cross-sectional view of an embodiment of a solenoid valve of the present invention.

Reference numerals: the base 10, the cavity 1030, the first water outlet hole 111, the groove 112, the second through hole 113, the limiting groove 121 and the clamping position 122; the valve clack 20, the diaphragm 21, the limiting column 22 and the first through hole 221; the pressing cover 30, the main body part 31, the second water outlet hole 311 and the positioning column 312; the snap portion 3121, the second groove 222, the protrusion 313, the elastic sealing gasket 40, and the water inlet pipe 50.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments.

For simplicity of description, the present specification defines the following orientations: when the check assembly is conducted, one side opposite to the liquid is the front side or the front side of each part, and the other side is the back side or the back side.

Example 1

The check assembly shown in fig. 1-3 comprises a base 10, a valve flap 20 and a gland 30, wherein the base 10 and the gland 30 are coaxially fixed, a cavity 1030 is formed between the base 10 and the gland 30 at intervals, and the valve flap 20 is placed in the cavity 1030 and is axially limited and clamped and fixed by the base 10 and the gland 30.

As shown in fig. 4, the base 10 is a bowl-shaped plastic member, and is divided into two parts, namely a bottom part 11 and a surrounding edge 12 axially extending from the front edge of the bottom part 11, and preferably, the outer diameter of the surrounding edge 12 is gradually increased along the front extending direction of the bottom part 11. The bottom 11 is provided with a recess 112 in the center for radial retention of the base 10 and the flap 20. The bottom 11 is provided with a plurality of axially through first outlet holes 111 at the periphery of the groove 112 for water drainage of the check assembly, and the first outlet holes 111 may be designed in a triangular shape, a fan shape or a circular shape, and are preferably arranged at the periphery of the groove 112 in a radial and circumferential manner. The bottom 11 of this embodiment is further provided with a second through hole 113 in the center. The inner wall of the opening edge of the surrounding edge 12 is radially recessed to form an annular groove, i.e. a limiting groove 121, and the front end of the limiting groove 121 protrudes to form an annular clamping position 122 for mounting and fixing the base 10 and the gland 30.

As shown in fig. 5, the valve flap 20 is a rubber opening/closing member, and is divided into two parts, namely a diaphragm 21 and a limiting post 22 formed by extending from the central axis of the diaphragm 21 in a protruding manner, wherein the limiting post 22 is adapted to the groove 112 to limit the radial displacement of the valve flap 20. The first through hole 221 is formed in the center of the limiting column 22.

As shown in fig. 6, the pressing cover 30 is a disk-shaped plastic body, the main body is a disk-shaped main body 31, the main body 31 is provided with a plurality of second outlet holes 311 axially penetrating through, and the second outlet holes 311 may be designed in a triangular shape, a fan shape, a circular shape, or the like, and are preferably arranged in a radial circumferential direction. In this embodiment, a cylindrical positioning post 312 axially protrudes from the center of the back of the main body 31, and the positioning post 312 is sleeved in the first through hole 221 or the second through hole 113, so as to better limit the radial displacement of the valve flap 20.

As shown in fig. 2 and fig. 3, which are axial sectional views of the check assembly of this embodiment after assembly, a post body at the back of the limiting post 22 is sleeved in the groove 112, and an outer contour of the post body is adapted to an outer contour of the groove 112, so as to realize radial limiting of the valve flap 20 and the base 10; the positioning column 312 of the gland 30 is sleeved in the first through hole 221 or the second through hole 113, the limiting groove 121 is sleeved in the periphery of the main body part 31, and is in interference fit with the inner wall of the surrounding edge 12 and is axially limited and fixed by the annular clamping position 122, meanwhile, the front end surface of the bottom part 11 and the rear end surface of the main body part 31 clamp the limiting column 22, and the valve flap 20 is axially and radially limited and fixed in the cavity 1030.

Under normal state, the front surface of the disc-shaped diaphragm 21 is recessed and is buckled on the back surface of the main body part 31 to completely cover all the second water outlet holes 311, and the outer edge of the front surface of the diaphragm 21 is elastically deformed to be tightly attached to the back surface of the main body part 31, so that a pair of sealing pairs is formed by the two.

As shown in fig. 3, when the liquid flows through the inner cavity of the surrounding edge 12, the liquid is collected onto the disc-shaped diaphragm 21 through the second water outlet 311, the diaphragm 21 is elastically deformed in a reverse direction under the action of water pressure and leaves the back of the main body 31, so that the sealing pair formed by the diaphragm 21 and the main body is opened to conduct the liquid, and the liquid flows out of the check assembly through the first water outlet 111, specifically, flows out of the check assembly through the portion of the first water outlet 111 located at the periphery of the diaphragm 21. Because the axial clearance of cavity 1030 is not big, the reverse elastic deformation of diaphragm 21 is less, can be by the preceding terminal surface bearing of bottom 11 in addition, prevents that diaphragm 21 from appearing elastic fatigue because of the deformation is great under the high water pressure state for a long time, can not well reset etc. influence the reliability condition.

As shown in fig. 2, when the liquid flows in the reverse direction and enters the inner cavity of the surrounding edge 12 through the first water outlet hole 111, the back surface of the membrane 21 is subjected to a large water pressure, the front surface of the membrane 21 is subjected to a small air pressure, and under the action of a large pressure difference between the back surface and the front surface, the membrane 21 is elastically deformed so that the front surface edge of the membrane 21 is pressed against the back surface of the main body 31 to completely cover all the second water outlet holes 311, thereby preventing the liquid from flowing backward through the non-return component.

As mentioned above, during operation of the non-return assembly, the membrane 21 has three elastically deformed states:

in a normal state, that is, under the condition that no liquid exists at both ends of the check assembly, the diaphragm 21 is pressed close to the back surface of the main body portion 31 of the gland 30 due to the fact that the base 10 and the gland 30 are clamped to limit in the axial direction, so that elastic deformation occurs, the front edge of the diaphragm 21 is pressed to the back surface of the main body portion 31 of the gland 30 under the action of restoring force, and a pair of sealing pairs are formed with the back surface of the main body portion 31 of the gland 30, at the moment, the check assembly is not conducted, and a pre-sealing effect is achieved;

in the first state, under the condition that the liquid flows in the forward direction, the water pressure acts on the front surface of the diaphragm 21, the restoring force of the diaphragm 21 in the normal state is overcome, the diaphragm 21 is elastically deformed, the edge of the front surface of the diaphragm 21 is far away from the back surface of the main body part 31 of the gland 30, at the moment, the sealing pair is opened, the check assembly is conducted, and the effect of conducting the liquid is achieved;

in the second state, when the liquid flows in the reverse direction, the water pressure acts on the back surface of the diaphragm 21, and the acting force is superposed in the same direction as the restoring force of the diaphragm 21 in the normal state, so that the diaphragm 21 is elastically deformed, the front edge of the diaphragm 21 is more closely attached to the back surface of the main body 31 of the gland 30, the sealing effect of the sealing pair is enhanced, the non-return component is not connected, and the anti-return effect is achieved.

Fig. 7 is an axial cross-sectional view of the check assembly in embodiment 2, which is different from embodiment 1 in that the opening edge of the base surrounding edge 12 is not provided with a limiting groove and a retaining position along the inner wall, but a cylindrical positioning column 312 of the pressing cover 30 is provided with a buckling portion 3121, the maximum radial dimension of the buckling portion 3121 is smaller than the diameter of the first through hole 221 and smaller than the diameter of the second through hole 113, so that the buckling portion 3121 can pass through the first through hole 221 without resistance, and elastically deform under the action of the assembling pressure to pass through the second through hole 113 and be clamped on the back surface of the bottom 11 of the base, and simultaneously, the pressing cover 30 axially clamps the valve flap 20, thereby realizing the assembling and fixing of the check assembly. In addition, an annular elastic sealing gasket 40 is arranged on the periphery of the chamber 1030, and the elastic sealing gasket 40 is also axially and tightly pressed and fixed by the base 10 and the gland 30, so that the leakage backflow from the periphery of the gland 30 under the condition of reverse flow of liquid can be better prevented.

Fig. 8 is an axial sectional view of an embodiment 3 of the check assembly, which is different from embodiment 1 in that a protrusion 313 is provided at the center of the rear surface of the gland 30 of the embodiment, and as shown in fig. 8 and 9, a second groove 222 is provided at the front end surface of the limiting column 22 of the valve flap 20. During assembly, the periphery of a column body at the back of the limiting column 22 is sleeved in the groove 112, the outer contour of the column body is matched with the outer contour of the groove 112, and the radial limiting of the valve clack 20 and the base 10 is realized; the convex part 313 of the gland 30 is sleeved in the second groove 222 on the front end face of the limiting column 22, the periphery of the main body part 31 is sleeved in the limiting groove 121, is in interference fit with the inner wall of the surrounding edge 12 and is axially limited and fixed by the annular clamping position 122, meanwhile, the limiting column 22 is clamped and limited by the groove 112 and the convex part 313, and the valve clack 20 is axially and radially limited and fixed in the cavity 1030.

Fig. 10 is an axial cross-sectional view of an embodiment of the solenoid valve, the non-return assembly is sleeved into an inner cavity of the solenoid valve water inlet pipe 50 by taking the front surface of the gland 30 as the front surface, wherein the peripheral edge 12 of the base 10 is in interference fit with the inner wall of the solenoid valve water inlet pipe 50 to realize the installation and fixation of the base 10 and the water inlet pipe 50, and of course, other conventional fixation processes such as bolt connection fixation, bonding fixation and the like of the peripheral edge 12 and the inner wall of the solenoid valve water inlet pipe 50 can also be adopted. Similarly, under the condition that the liquid flows in the forward direction and enters the water inlet pipeline 50, the water pressure acts on the front surface of the diaphragm 21, the restoring force of the diaphragm 21 in the normal state is overcome, the diaphragm 21 is elastically deformed, the edge of the front surface of the diaphragm 21 is far away from the back surface of the main body part 31, at the moment, the sealing pair is opened, the check assembly is conducted, and the effect of conducting the liquid is achieved.

Under the condition that liquid flows reversely, water pressure acts on the back of the membrane 21, acting force of the water pressure is the same as restoring force direction of the membrane 21 in a normal state and is superposed, so that the membrane 21 is strengthened to generate elastic deformation, the front edge of the membrane 21 is more tightly attached to the back of the main body part 31 of the gland 30, the sealing effect of the sealing pair is enhanced, all the second water outlet holes 311 are completely covered, the non-return assembly is not conducted, and the effect of backflow prevention is achieved.

The non-return assembly provided by the utility model is not only suitable for the water inlet pipeline of the electromagnetic valve, but also suitable for other pipelines which are used for unidirectional liquid conduction, such as the water inlet pipeline and the water outlet pipeline of a pump, the water outlet pipeline of a valve and the like, and preventing backflow.

Claims

1. A check assembly, comprising:

the base (10) is provided with a bottom (11) and a surrounding edge (12) surrounding the periphery of the bottom (11), and the bottom (11) is provided with a plurality of first water outlet holes (111) which are axially communicated;

the valve clack (20) is an elastic body and is provided with a diaphragm (21) with a spherical surface and a limiting column (22) which is formed by axially protruding and extending the center of the diaphragm (21);

a gland (30) having a disk-shaped main body part (31), wherein the main body part (31) is provided with a plurality of second water outlet holes (311) which axially penetrate through;

the base (10) and the gland (30) are concentrically fixed in a facing manner, and the valve clack (20) is axially and radially limited by the base (10) and the gland (30) and is axially fixed in a chamber (1030) formed by the gland (30) and the base (10) in a facing and enclosing manner;

the structure is that: when liquid flows from one side of the gland (30) to the base (10), the diaphragm (21) is in a first state, the diaphragm (21) is separated from the main body part (31) and attached to the bottom part (11), and the second water outlet hole (311) and the first water outlet hole (111) form a channel for the liquid to flow out; when liquid flows from the side of the base (10) to the direction of the gland (30), the diaphragm (21) is in the second state, the diaphragm (21) is attached to the main body part (31) to seal the second water outlet hole (311), and the liquid is prevented from flowing out of the second water outlet hole (311) from the first water outlet hole (111).

2. The check assembly of claim 1, wherein the bottom (11) is recessed centrally to form a retaining groove (112), and the retaining post (22) is adapted to fit within the retaining groove (112) to limit radial displacement of the valve flap (20).

3. The check assembly according to claim 1 or 2, wherein the limiting post (22) is hollow to form a first through hole (221), the main body portion (31) of the gland (30) protrudes from the center to form a columnar positioning post (312), and the positioning post (312) is sleeved in the first through hole (221) to limit the radial displacement of the valve flap (20).

4. The check assembly according to claim 1 or 2, wherein the limiting column (22) is hollow to form a second groove (222), a protrusion (313) is arranged at the center of the main body part (31) of the gland (30), and the protrusion (313) is fittingly sleeved in the second groove (222) to limit the radial displacement of the valve clack (20).

5. The check assembly according to claim 3, characterized in that the inner wall of the surrounding edge (12) is radially recessed to form an annular limiting groove 121, the front end of the limiting groove 121 is protruded to form an annular blocking position 122, and the blocking position 122 is blocked with the periphery of the gland (30) to limit and fix the gland (30).

6. The check assembly according to claim 4, characterized in that the inner wall of the surrounding edge (12) is radially recessed to form an annular limiting groove 121, the front end of the limiting groove 121 is protruded to form an annular blocking position 122, and the blocking position 122 is blocked with the periphery of the gland (30) to limit and fix the gland (30).

7. The check assembly according to claim 3, wherein a clamping portion (3121) is provided at the end of the positioning column (312), a second through hole (113) is provided at the center of the bottom (11), and the clamping portion (3121) passes through the second through hole (113) and clamps the back surface of the bottom (11) to limit and fix the gland (30).

8. The non-return assembly according to claim 1, characterized in that the chamber (1030) is peripherally provided with an annular elastic gasket (40), the gasket (40) being axially held in compression by the seat (10) and by the gland (30).

9. A solenoid valve comprising a water inlet conduit (50) and wherein a non-return assembly according to any one of claims 1 to 8 is secured in said water inlet conduit (50).