Check valve disc and check valve

Abstract

The utility model discloses a check valve valve plate and check valve, check valve valve plate includes first board body, sealing body and second board body that set up in proper order, sealing body has the clamping portion of clamping between first board body and second board body and the exposed portion of this clamping portion extending outward, it is the structure of mutual plane cooperation between the clamping portion and first board body, it is the structure of matching bending surface cooperation between the clamping portion and second board body. The check valve valve plate and check valve of the new type have the characteristics such as structural stability, good sealing performance and long service life.

Description

Technical Field

[0001] This utility model relates to the field of check valve technology, specifically to a check valve disc and a check valve. Background Technology

[0002] Check valves used in building ventilation systems are primarily used to prevent backflow of air from public smoke exhaust ducts into the room. Chinese patent document CN200820170530.0 discloses a check valve, including a valve body and a check vane. A positioning plate is provided on the inner side of the check vane, and a fixing groove is provided on the outer edge of the positioning plate. A sealing diaphragm gasket for sealing is fitted into the fixing groove. The sealing diaphragm gasket covers the edge of the valve body channel to achieve a sealing effect. However, the structure of the sealing diaphragm gasket is unstable, resulting in insufficient local sealing. Furthermore, under the influence of airflow in the channel, it is prone to loosening, displacement, or even detachment, affecting the sealing function and the product's service life.

[0003] In view of this, this case conducts an in-depth study of the above-mentioned problems and proposes a check valve disc and a check valve, thus giving rise to this case. Utility Model Content

[0004] The purpose of this utility model is to provide a check valve plate and a check valve, which have the characteristics of stable structure, good sealing performance and long service life.

[0005] To achieve the above objectives, the solution of this utility model is:

[0006] A check valve disc includes a first plate, a sealing body, and a second plate arranged sequentially; the sealing body has a clamping portion sandwiched between the first plate and the second plate and an exposed portion extending outward from the clamping portion; the clamping portion and the first plate are in a planar fit, and the clamping portion and the second plate are in a matching bent surface fit.

[0007] The structure of the bent surface mating is an arc-shaped protruding surface mating structure, which includes a first mating inclined surface, a second mating inclined surface, and an arc-shaped transition surface that smoothly connects the first mating inclined surface and the second mating inclined surface.

[0008] The outer side of the structure in which the corresponding bent surfaces of the clamping part and the second plate body are fitted is also smoothly connected to a structure in which they fit together planarly.

[0009] The exposed portion on one side of the first plate rests on the surface of the first plate, which is a flat surface; the exposed portion on one side of the second plate extends beyond the outer periphery of the second plate.

[0010] The minimum thickness of the clamping part is greater than the maximum thickness of the exposed part.

[0011] A transition portion is provided between the clamping portion and the exposed portion, and the thickness of the transition portion is greater than the maximum thickness of the exposed portion.

[0012] The first plate and the second plate are D-shaped plates, and the sealing body is a D-shaped silicone sealing ring.

[0013] The two ends of the first plate corresponding to the straight edge are integrally formed with outwardly protruding rotating shafts.

[0014] The first plate and the second plate are respectively provided with riveting holes for mutual riveting at positions close to the two ends of the straight edge and the center of the arc edge.

[0015] A check valve includes a valve body, two valve holes arranged obliquely and symmetrically within the valve body, and two sets of valve plates arranged symmetrically for opening and closing the two valve holes; the valve holes are formed with edges that cooperate with the exposed portion for sealing.

[0016] After adopting the above solution, the present invention provides a check valve disc and a check valve. In the check valve disc, the clamping part is clamped and engaged with the first plate and the second plate using a combination of planar and bent surfaces. Compared with the prior art, firstly, the sealing body structure assembly is more stable and reliable, and on this basis, it has the advantages of simple structure manufacturing, reduced processing accuracy requirements, and less susceptibility to misalignment affecting overall stability during assembly; secondly, the interface sealing between the plates is achieved through the compression deformation of the clamping part, and the combination of planar and bent surfaces makes the contact pressure more uniform and the interface sealing performance more excellent; thirdly, the combination of planar and bent surfaces also optimizes the stress distribution, which can extend the service life of the sealing body and the product as a whole. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the valve plate of this novel check valve;

[0018] Figure 2 This is a structural breakdown of the valve plate of this novel check valve. Figure 1 ;

[0019] Figure 3 This is a cross-sectional view of the valve plate of this novel check valve;

[0020] Figure 4 yes Figure 3 A schematic diagram of a local structure in the image;

[0021] Figure 5 This is a schematic diagram of the structure of this new type of check valve;

[0022] Figure 6 This is an exploded view of the structure of this new type of check valve.

[0023] Label Explanation

[0024] The check valve has a valve plate 100, a first plate 1, a plate surface 11, a riveting hole 12, and a rotating shaft 13; a sealing body 2, a clamping part 21, an exposed part 22, and a transition part 23; a second plate 3, a riveting hole 32; a planar fit structure 4, a bent surface fit structure 5, a first fit inclined surface 51, a second fit inclined surface 52, an arc transition surface 53, and a planar fit structure 6; a valve body 200, a valve hole 201, and an edge 202. Detailed Implementation

[0025] The following detailed description of this case is provided in conjunction with the accompanying drawings and specific embodiments.

[0026] This case involves a check valve disc 100, such as... Figure 1-4 As shown, the system includes a first plate 1, a sealing body 2, and a second plate 3 arranged sequentially. The sealing body 2 has a clamping portion 21 sandwiched between the first plate 1 and the second plate 2, and an exposed portion 22 extending outward from the clamping portion 21. The clamping portion 21 and the first plate 1 have a planar fit structure 4, where the mating surfaces between the clamping portion 21 and the first plate 1 are all planar. The clamping portion 21 and the second plate 3 have a matching bent surface fit structure 5, where the mating surfaces between the clamping portion 21 and the second plate 3 are matching bent planes. Thus, the clamping fit between the clamping portion 21 and the first plate 1 and the second plate 3 adopts a combination of planar and bent surface fits.

[0027] The aforementioned combination of planar and bent-surface mating, where one side of the clamping part 21 uses a planar mating (planar side) and the other side uses a bent-surface mating, concentrates the clamping force through a single-sided bent structure. The uniform contact on the planar side compensates for the tolerances on the bent side. Compared to a double-sided bent-surface mating structure, this reduces the risk of inadequate local sealing due to misalignment, results in more uniform contact pressure, and superior overall interface sealing performance. Furthermore, the elastic deformation of the single-sided bent structure is concentrated on one side, optimizing stress distribution, preventing fatigue failure, and extending the seal's service life.

[0028] The combination of planar and bent surfaces has no complex structure on the planar side, has lower requirements for the flatness of the plate surface, and is less likely to affect the overall stability due to misalignment during assembly. Compared with the structure with bent surfaces on both sides, it has stronger resistance to misalignment and assembly adaptability, and the structure is more stable.

[0029] The combination of flat and bent surfaces requires processing only one side of the bent surface structure, reducing the cost of forming the sheet material and also reducing the requirements for the processing accuracy of the two sheets, thus reducing the risk of misfitting due to processing errors.

[0030] like Figure 3-4As shown, the bent surface mating structure 5 is an arc-shaped protruding surface mating structure. The arc-shaped protruding surface mating includes a first mating inclined surface 51, a second mating inclined surface 52, and an arc-shaped transition surface 53 smoothly connecting the first mating inclined surface 51 and the second mating inclined surface 52. That is, the clamping part 21 forms a first sealing inclined surface, a second sealing inclined surface, and an arc-shaped surface smoothly connecting the first sealing inclined surface and the second sealing inclined surface. The second plate 3 correspondingly forms a matching first sealing inclined surface, a second sealing inclined surface, and an arc-shaped surface. The first sealing inclined surface of the clamping part 21 and the first sealing inclined surface of the second plate 3 mate to form the first mating inclined surface 51. Similarly, the second sealing inclined surface of the clamping part 21 and the second sealing inclined surface of the second plate 3 mate to form the second mating inclined surface 52. The arc-shaped surface of the clamping part 21 and the arc-shaped surface of the second plate 3 mate to form the arc-shaped transition surface 53. This smooth connection structure can uniformly contact pressure, improve the sealing interface fit, and reduce stress concentration.

[0031] Further as Figure 3-4 As shown, the outer side of the structure 5, which corresponds to the bent surface of the clamping part 21 and the second plate 3, is also smoothly connected to a structure 6 that is mutually planar. Thus, the clamping part 21 has two opposing clamping surfaces. One clamping surface forms four continuous sealing bands with different structural forms between it and the second plate 3, namely the first mating inclined surface 51, the arc-shaped transition surface 53, the second mating inclined surface 52, and the mutually planar mating structure 6. The other clamping surface of the clamping part 21 adopts a mutually planar mating structure 4 with the first plate 1. This structural combination well takes into account the comprehensive effects of simple assembly, stable structure, balanced and excellent interface sealing performance, and long sealing life.

[0032] like Figure 3-4 As shown, the exposed portion 22 rests on the surface 11 of the first plate 1 on one side of the first plate 1, and the surface 11 is flat. The exposed portion 22 extends beyond the outer periphery of the second plate 3 on the other side. When the check valve plate closes the check valve orifice, the exposed portion 22 is pressed against the edge of the valve orifice, and the plate surface 11 is sealed to the edge of the valve orifice through the exposed portion 22.

[0033] like Figure 3-4 As shown, the minimum thickness of the clamping portion 21 is greater than the maximum thickness of the exposed portion 22. This relatively thicker design of the clamping portion 21 allows for a more even distribution of clamping force, ensuring the overall stability of the sealing structure, preventing localized stress concentration that could lead to seal failure, and also providing stronger support for the exposed portion 22, preventing twisting deformation that could cause seal failure.

[0034] like Figure 3-4As shown, a transition portion 23 is provided between the clamping portion 21 and the exposed portion 22. The thickness of the transition portion 23 is greater than the maximum thickness of the exposed portion 22. The transition portion 23 serves as a stress buffer transition zone between the clamping portion 21 and the exposed portion 22. Its relatively thick design can smoothly transition stress, avoid cutting stress in the exposed portion, and extend the sealing life.

[0035] like Figure 1-2 As shown, the first plate 1 and the second plate 3 are D-shaped plates, and the sealing body 2 is a D-shaped silicone sealing ring. Therefore, both the clamping part 21 and the exposed part 22 are D-shaped closed-loop structures, achieving a full-circle closed-loop sealing effect.

[0036] like Figure 1-2 As shown, the first plate 1 has outwardly protruding rotating shafts 13 integrally formed at both ends of the corresponding straight edge. The check valve plate is movably mounted on the check valve via the rotating shafts 13 at both ends, and realizes the function of opening and closing the valve orifice.

[0037] like Figure 1-2 As shown, the first plate 1 has several sets of riveting holes 12, and the second plate 3 has several sets of riveting holes 32. The riveting holes 12 and 32 are riveted together to achieve integral fixation of the first plate 1 and the second plate 3 and to tightly clamp and fix the sealing body 2. In a specific embodiment, the first plate 1 and the second plate 3 are D-shaped plates, and three sets of riveting holes 12 and 32 are arranged in a triangular distribution, located on the first plate 1 and the second plate 3 respectively near the two ends of the straight edge and the center of the arc edge. This distribution design achieves the most stable and balanced clamping and fixing of the sealing body 2 with the simplest riveting points.

[0038] like Figure 5-6 As shown, this invention also relates to a check valve, comprising a valve body 200, two obliquely and symmetrically arranged valve holes 201 located within the valve body 200, and two sets of valve plates symmetrically arranged for opening and closing the two valve holes 201. These two sets of valve plates are the check valve plates 100 described above. The valve holes 201 have edges 202 that correspondingly cooperate with the exposed portion 22 for sealing. The check valve using the aforementioned valve plates 100 possesses the beneficial effects of a stable and reliable sealing structure, outstanding interface sealing performance, and long sealing life.

[0039] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention shall fall within the scope of the claims of the present invention.

Claims

1. A check valve disc, comprising a first plate, a sealing body, and a second plate arranged sequentially; the sealing body having a clamping portion sandwiched between the first plate and the second plate and an exposed portion extending outward from the clamping portion; the clamping portion and the first plate are in a planar fit, and the clamping portion and the second plate are in a matching bent surface fit.

2. The check valve disc as described in claim 1, characterized in that: The structure of the bent surface mating is an arc-shaped protruding surface mating structure, which includes a first mating inclined surface, a second mating inclined surface, and an arc-shaped transition surface that smoothly connects the first mating inclined surface and the second mating inclined surface.

3. A check valve disc as described in claim 1 or 2, characterized in that: The outer side of the structure in which the corresponding bent surfaces of the clamping part and the second plate body are fitted is also smoothly connected to a structure in which they fit together planarly.

4. The check valve disc as described in claim 1, characterized in that: The exposed portion on one side of the first plate rests on the surface of the first plate, which is a flat surface; the exposed portion on one side of the second plate extends beyond the outer periphery of the second plate.

5. A check valve disc as described in claim 1, characterized in that: The minimum thickness of the clamping part is greater than the maximum thickness of the exposed part.

6. The check valve disc as described in claim 1, characterized in that: A transition portion is provided between the clamping portion and the exposed portion, and the thickness of the transition portion is greater than the maximum thickness of the exposed portion.

7. A check valve disc as described in claim 1, characterized in that: The first plate and the second plate are D-shaped plates, and the sealing body is a D-shaped silicone sealing ring.

8. A check valve disc as described in claim 7, characterized in that: The two ends of the first plate corresponding to the straight edge are integrally formed with outwardly protruding rotating shafts.

9. A check valve disc as described in claim 7, characterized in that: The first plate and the second plate are respectively provided with riveting holes for mutual riveting at positions close to the two ends of the straight edge and the center of the arc edge.

10. A check valve, comprising a valve body, two valve holes arranged obliquely and symmetrically within the valve body, and two sets of valve plates arranged symmetrically for opening and closing the two valve holes, wherein the valve plates are the check valve plates according to any one of claims 1-9; the valve holes are formed with edges that cooperate with the exposed portion for sealing.

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