Non-return device and valve applying same

Abstract

The non-return device comprises a support, a filter part and an elastic part, the filter part is installed on the support, the filter part is provided with a water inlet side and a water outlet side, a plurality of filter holes communicating the water inlet side with the water outlet side are formed in the filter part, the elastic part is installed on the support and located on the water outlet side, and the elastic part is installed on the support and located on the water outlet side. The elastic piece is configured to be capable of covering the water outlet side to seal the filter hole and can be elastically folded to open the filter hole under the action of water pressure of the water outlet side; the filtering part is matched with the elastic part, so that the filtering function and the non-return function are integrated, the whole structure is simple, the occupied space is small, and the installation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of water valve technology, and in particular to a check valve and a valve component using the same. Background Technology

[0002] Some existing valves have both filtration and check functions. For example, Chinese patent CN208311568U discloses a filter check valve in which the components for filtration and check functions are installed separately. This requires more internal space for the installation of each component, resulting in a larger overall valve size, a larger footprint, and more complicated installation. Utility Model Content

[0003] The present invention aims to at least partially solve one of the aforementioned technical problems in the related art. To this end, the present invention proposes a backflow prevention device.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] This utility model also proposes a valve having the above-mentioned anti-reverse device.

[0006] According to a first aspect of the present invention, a backflow prevention device includes a support, a filter element, and an elastic element. The filter element is mounted on the support and has an inlet side and an outlet side. The filter element is provided with a plurality of filter holes that connect the inlet side and the outlet side. The elastic element is mounted on the support and located on the outlet side. The elastic element is configured to be able to cover the outlet side to block the filter holes and to elastically close to open the filter holes when subjected to water pressure on the outlet side.

[0007] The backflow prevention device according to the embodiment of this utility model has at least the following beneficial effects: the combination of the filter element and the elastic element integrates the filtration function and the backflow prevention function into one, the overall structure is simple, the space occupies is small, and the installation is convenient.

[0008] According to some embodiments of this utility model, both the filter element and the elastic element are hollow cones. The outer side of the filter element is the water inlet side, and the inner side of the filter element is the water outlet side. When the elastic element is subjected to the water pressure of the water outlet side, it elastically retracts towards the central axis of the elastic element.

[0009] According to some embodiments of the present invention, the bracket is provided with mounting holes and a plurality of support arms, the plurality of support arms are arranged sequentially at intervals around the mounting holes, the filter element is fixed on the support arms, and the elastic element is provided with a connecting shaft at its small diameter end, the connecting shaft passing through and being fixed in the mounting holes.

[0010] According to some embodiments of the present invention, the connecting shaft is elastic, the connecting shaft is interference-fitted with the mounting hole, and a protrusion is provided at the end of the connecting shaft away from the elastic element, the maximum outer diameter of the protrusion being larger than the diameter of the mounting hole.

[0011] According to some embodiments of the present invention, the bracket further includes a first support base and a second support base. The mounting hole is located at the center of the first support base. The first support base is a hollow disc shape. The support arm extends from the first support base. The second support base is connected in a ring shape to the ends of each support arm away from the first support base. The outer diameter of the first support base and the outer diameter of the second support base are equal.

[0012] According to some embodiments of the present invention, both the circumferential sidewall of the first support and the circumferential sidewall of the second support are provided with mounting grooves for installing sealing rings.

[0013] According to some embodiments of the present invention, a step is provided on the inner side wall of the second support base, and an extension edge extends radially outward from the periphery of the large-diameter end of the elastic member. When the elastic member is not subjected to water pressure on the outlet side, the extension edge overlaps the step.

[0014] According to some embodiments of the present invention, the filter element and the support arm are integrally injection molded.

[0015] According to some embodiments of the present invention, the filter element is clamped between the support arm and the elastic element.

[0016] The valve according to a second aspect of the present invention includes a check valve.

[0017] The valve according to the present invention has at least the following beneficial effects: the water flowing through the valve is filtered by the anti-reverse device, and the water at the outlet end of the valve can be prevented from flowing back to the inlet end.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is an exploded view of the anti-reverse device.

[0021] Figure 2 This is a schematic diagram of the anti-reverse device assembly;

[0022] Figure 3 This is an assembly diagram of the support and filter elements;

[0023] Figure 4 This is a structural diagram of the valve.

[0024] Reference numerals: bracket 100; mounting hole 110; support arm 120; first support seat 130; second support seat 140; step 141; mounting groove 150; filter element 200; inlet side 210; outlet side 220; filter hole 230; elastic element 300; connecting shaft 310; protrusion 311; extension edge 320; sealing ring 400. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0026] This utility model relates to a backflow prevention device, including a support 100, a filter element 200 and an elastic element 300.

[0027] like Figure 1 , Figure 2 and Figure 3As shown, the filter element 200 is mounted on the support 100. The filter element 200 can be, but is not limited to, a flat plate or a conical shape. The support 100 fixes the filter element 200. One side of the filter element 200 is the inlet side 210, and the opposite side is the outlet side 220. The filter element 200 has several filter holes 230, which connect the inlet side 210 and the outlet side 220 of the filter element 200. An elastic element 300 is mounted on the support 100. The elastic element 300 is made of a material that can undergo elastic deformation, such as rubber or silicone. The shape of the elastic element 300 is adapted to the shape of the filter element 200. The elastic element 300 is located on the outlet side 220 of the filter element 200. When the elastic element 300 is not subjected to any external force (its normal state), it seals the outlet side 220 of the filter element 200, that is, it blocks the ends of each filter hole 230 located on the outlet side 220. When there is water pressure on the inlet side 210 of the filter element 200, water flows from the inlet side 210 to the outlet side 220 through the filter holes 230. The water impacts the surface of the elastic element 300 facing the outlet side 220, causing the elastic element 300 to undergo elastic deformation and retract away from the outlet side 220. At this time, the elastic element 300 moves away from the ends of the filter holes 230, and water can be discharged from the inlet side 210 through each filter hole 230 to the outlet side 220. As water flows through the filter element 200, the filter element 200 uses the filter holes 230 to filter and separate larger solid impurities in the water. When there is no water pressure on the inlet side 210, the elastic element 300 will elastically reset and re-seal the outlet side 220. Furthermore, when the side of the elastic element 300 away from the outlet side 220 is subjected to water pressure, the elastic element 300 will increase the force against the outlet side 220, preventing water from flowing from the outlet side 220 to the inlet side 210, thus achieving a backflow prevention function. In practical use, the backflow prevention device can be applied to different pipes or water effluent products. The cooperation between the filter element 200 and the elastic element 300 integrates the filtration and backflow prevention functions into one unit, resulting in a simple overall structure, small footprint, and easy installation. Figure 4 As shown, this utility model also relates to a valve, on which a check device is installed for use. The check device filters the water flowing through the valve and prevents water from flowing back from the outlet end to the inlet end.

[0028] In one embodiment, such as Figure 1 , Figure 2 and Figure 3As shown, both the filter element 200 and the elastic element 300 are hollow cones. The outer surface of the filter element 200 is the inlet side 210, and the inner surface is the outlet side 220. The elastic element 300 is coaxially arranged with the filter element 200. When the elastic element 300 is subjected to water pressure from the outlet side 220, it elastically contracts towards its own central axis, thereby releasing the blockage of the filter holes 230. A certain gap is formed between the elastic element 300 and the outlet side 220, and water is discharged outward from the gap. When the elastic element 300 is not subjected to water pressure from the outlet side 220, or when the side of the elastic element 300 away from the outlet side 220 is subjected to water pressure, the elastic element 300 can open in a direction away from its own central axis to seal the outlet side 220.

[0029] Based on the above embodiment, the bracket 100 is provided with mounting holes 110 and a plurality of support arms 120. The plurality of support arms 120 are distributed sequentially and at intervals around the mounting holes 110, and each support arm 120 is arranged in an umbrella shape. The orientation of the support arms 120 is consistent with the oblique direction of the tapered surface of the filter element 200. The filter element 200 is fixed on the support arms 120. The elastic element 300 has a small-diameter end and a large-diameter end at its two ends, and the outer diameter of the elastic element 300 gradually decreases from the large-diameter end to the small-diameter end. A connecting shaft 310 is provided at the small-diameter end of the elastic element 300, and the connecting shaft 310 extends out along the axial direction of the elastic element 300. The connecting shaft 310 passes through and is fixed in the mounting holes 110. The filter element 200 is fixedly supported by the support arms 120, effectively preventing deformation of the filter element 200. The filter element 200 and the support arms 120 can be integrally injection molded, eliminating the need for assembly operations between the filter element 200 and the bracket 100. Alternatively, the filter element 200 and the support 100 are two independent components. The filter element 200 is clamped between the support arm 120 and the elastic element 300. The inlet side 210 of the filter element 200 is limited by the support 100, and the outlet side 220 of the filter element 200 is limited by the elastic element 300.

[0030] Furthermore, the connecting shaft 310 is elastic. The connecting shaft 310 can be integrally formed on the elastic element 300. A protrusion 311 is provided at the end of the connecting shaft 310 away from the elastic element 300. The protrusion 311 can protrude in a cylindrical shape along the radial direction of the connecting shaft 310. The elastic element 300 passes through the connecting shaft 310 and is fitted into the mounting hole 110. The connecting shaft 310 and the mounting hole 110 are interference-fitted. The protrusion 311 passes through the mounting hole 110, which is located between the protrusion 311 and the elastic element 300. The protrusion 311 prevents the elastic element 300 from dislodging from the mounting hole 110 during use. The elastic element 300 can be pulled out of the mounting hole 110 for easy cleaning of the filter element 200.

[0031] The bracket 100 further includes a first support base 130 and a second support base 140. A mounting hole 110 is located at the center of the first support base 130, which is a hollowed-out disc. Each support arm 120 extends obliquely from the first support base 130. The second support base 140 is annular and is connected to the ends of each support arm 120 away from the first support base 130. The outer diameters of the first support base 130 and the second support base 140 are equal. Figure 4 As shown, when the check valve is installed in the valve, the circumferential sidewalls of the first support 130 and the second support 140 abut against the inner wall of the valve's inner tube. The check valve is fixed in the valve by the first support 130 and the second support 140. The radial direction of the first support 130 and the second support 140 is limited by the radial direction of the valve's inner tube wall, which in turn limits the radial direction of each support arm 120, ensuring the stability of the support arm 120 in fixing the filter element 200.

[0032] Based on the above embodiments, both the circumferential sidewalls of the first support 130 and the second support 140 are provided with mounting grooves 150, which are used to install the sealing ring 400. During installation, the sealing ring 400 is fitted onto the first support 130 and the second support 140 through the mounting grooves 150. When installed into the valve using a check valve, the sealing ring 400 abuts against the pipe wall of the valve to achieve a water seal.

[0033] A step 141 may be provided on the inner wall of the second support 140. An extension edge 320 extends radially outward from the periphery of the large-diameter end of the elastic member 300. When the elastic member 300 is not subjected to water pressure from the outlet side 220, the extension edge 320 overlaps the step 141. When the elastic member 300 is subjected to water pressure from the outlet side 220, the extension edge 320 will move away from the step 141 due to the elastic deformation of the elastic member 300. When water acts on the elastic member 300 from the outlet side 220 towards the inlet side 210, the cooperation between the extension edge 320 and the step 141 improves watertightness and further enhances the backflow prevention effect.

[0034] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this specification, references to terms such as "some specific embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A check device characterized by: The filter element (200) and the elastic element (300) are both hollow conical, the outer side of the filter element (200) is the water inlet side (210), the inner side of the filter element (200) is the water outlet side (220), and the elastic element (300) is elastically contracted in the direction of the central axis of the elastic element (300) when subjected to the water pressure of the water outlet side (220).

2. The backstop of claim 1, wherein: The support frame (100) is provided with a mounting hole (110) and a plurality of support arms (120), the plurality of support arms (120) are distributed in sequence and at intervals around the mounting hole (110), the filter element (200) is fixed on the support arms (120), and the small-diameter end of the elastic element (300) is provided with a connecting shaft (310) which is arranged in and fixed in the mounting hole (110).

3. The non-return device of claim 2, wherein: The connecting shaft (310) has elasticity, the connecting shaft (310) is in interference fit with the mounting hole (110), the end of the connecting shaft (310) away from the elastic element (300) is provided with a protrusion (311), and the maximum outer diameter of the protrusion (311) is greater than the hole diameter of the mounting hole (110).

4. The non-return device of claim 3, wherein: The support frame (100) further includes a first support seat (130) and a second support seat (140), the mounting hole (110) is arranged at the center of the first support seat (130), the first support seat (130) is a hollow disc, the support arms (120) extend from the first support seat (130), the second support seat (140) is connected to the end of each support arm (120) away from the first support seat (130) in a circular ring shape, and the outer diameter of the first support seat (130) is equal to the outer diameter of the second support seat (140).

5. The non-return device of claim 3, wherein: The circumferential side wall of the first support seat (130) and the circumferential side wall of the second support seat (140) are both provided with a mounting groove (150) for mounting a sealing ring (400).

6. The non-return device of claim 5, wherein: The inner side wall of the second support seat (140) is provided with a step (141), the periphery of the large-diameter end of the elastic element (300) extends outward in a radial direction to form an extension edge (320), and the extension edge (320) is lapped on the step (141) when the elastic element (300) is not subjected to the water pressure of the water outlet side (220).

7. The backstop of claim 5, wherein: ​ 8. The backstop of claim 3, wherein: The filter element (200) and the support arm (120) are integrally injection molded.

9. The backstop of claim 3, wherein: The filter element (200) is clamped between the support arm (120) and the elastic element (300).

10. A valve member characterized by: The check device according to any one of claims 1 to 9.

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