Improved one-way exhaust valve

Abstract

The utility model relates to an improved one-way exhaust valve which comprises a valve seat, a valve cover and a cylindrical valve plate. The valve seat wall is provided with a connecting clamping groove, the outer side wall of the connecting clamping groove is in a circular truncated cone shape, the sealing side wall is provided with a connecting buckle, the valve seat wall is provided with at least three positioning protrusions, ventilation grooves are formed among the positioning protrusions, the valve seat wall, the positioning protrusions and the top wall of the valve deck define a moving cavity, and the valve plate is located in the moving cavity. The valve plate is attached to the wall of the valve seat and covers the air inlet. At least three strip-shaped movable limiting bulges are arranged on the top wall of the valve cover towards the valve plate, and are uniformly distributed around the axial lead of the wall of the valve seat; a gap is formed between the valve plate and the movable limiting protrusion, or the valve plate is elastic and attached to the movable limiting protrusion. The exhaust valve can be ensured to exhaust uniformly, the sealing performance is improved, the exhaust performance of the exhaust valve can be ensured not to be influenced by the rotating direction of the valve seat relative to the valve cover, and the exhaust valve is convenient to assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust valves, in particular to an improved one-way exhaust valve. Background Art

[0002] The prior art CN209839243U discloses a one-way exhaust valve which is convenient for assembly, comprising a valve seat 1, a valve plate 2 and a valve cover 3. The valve seat 1 includes a valve seat wall 11, and an air inlet hole 111 is provided on the valve seat wall 11. The valve cover 3 includes a valve cover top wall 31, and a sealing side wall 32 extends downward from the edge of the valve cover top wall 31; the sealing side wall 32 is connected to the valve seat wall 11, and the valve seat wall 11, the sealing side wall 32 and the valve cover top wall 31 enclose a moving cavity 21. The valve plate 2 is located in the moving cavity 21, and gaps are provided between the valve plate 2 and the valve cover top wall 31 and between the valve plate 2 and the sealing side wall 32. The valve plate 2 is in contact with the valve seat wall 11 and covers the air inlet hole 111. At least two positioning protrusions 12 are provided on the valve seat wall 11, the positioning protrusions 12 are respectively in contact with the valve plate 2, and a ventilation groove 121 is provided between the positioning protrusions 12.

[0003] However, in the technical solution disclosed in the prior art CN209839243U, the moving limit protrusion 22 includes a first limit protrusion 221 and a second limit protrusion 222; the first limit protrusion 221 and the second limit protrusion 222 are respectively located on both sides of the valve seat wall 11. In other words, the first limit protrusion 221 and the two second limit protrusions 222 are arranged in a "pin" shape as a whole. When the valve plate 2 moves in the moving cavity 21, it is easy to flip to the left and right sides of the "pin" shape, and a large exhaust gap is generated on one side after flipping while the exhaust gap on the opposite side of the flip is small or even there is no exhaust gap, but it basically does not flip to the upper and lower sides of the "pin" shape. The exhaust performance of the exhaust valve is affected by the rotation orientation of the exhaust valve. That is to say, when the whole exhaust valve is in a certain specific rotation orientation, the exhaust performance is the largest, and when the whole exhaust valve is in a rotation orientation other than the specific rotation orientation, the exhaust performance is the smallest, resulting in uneven exhaust performance of the exhaust valve. When in use, the rotation orientation of the exhaust valve needs to be noted, and the universality is poor. In addition, there is a large flipping space on the left and right sides of the aforementioned "pin" shape, resulting in possible skew on one side when the valve plate 2 is reset after exhaust and not being in contact with the valve seat wall 11, and it is relatively easy to leak air. In addition, the rotation orientation of the valve seat 1 relative to the valve cover 3 in the technical solution disclosed in the prior art CN209839243U also affects the exhaust performance of the exhaust valve. Summary of the Utility Model

[0004] An object of the utility model is to solve or alleviate the above technical problems.

[0005] The present invention employs an improved one-way exhaust valve, comprising a valve seat, a valve cover, and a cylindrical valve plate. The valve seat includes a valve seat wall with an air inlet, the cross-section of which is circular. The valve cover includes a valve cover top wall, the edge of which extends downward to form a sealing side wall. The valve seat wall is provided with a connecting groove, the outer wall of which is frustoconical. The sealing side wall is provided with a connecting buckle that engages with the connecting groove. The valve cover top wall is provided with an exhaust hole. The valve seat wall is provided with at least three positioning protrusions, and a venting groove is provided between the positioning protrusions. The valve seat wall, positioning protrusions, and valve cover top wall together form a movable cavity. The valve plate is located within the movable cavity, fitting against the valve seat wall and covering the air inlet. The valve cover top wall is provided with at least three strip-shaped movable limiting protrusions facing the valve plate, the movable limiting protrusions being evenly distributed around the axis of the valve seat wall. A gap is provided between the valve plate and the movable limiting protrusions, or the valve plate is elastic and fits against the movable limiting protrusions.

[0006] The advantages of this invention are that it can ensure uniform exhaust and improve sealing performance of the exhaust valve, and also ensure that the exhaust performance of the exhaust valve is not affected by the rotational position of the valve seat relative to the valve cover, thereby facilitating the assembly of the exhaust valve.

[0007] In a further technical solution, the inner surfaces of each positioning protrusion are located on the same cylindrical surface, the diameter of the inner surface of the positioning protrusion is the inner diameter of the positioning protrusion, the diameter of the valve plate is the valve plate diameter, and the valve plate diameter is smaller than the inner diameter of the positioning protrusion.

[0008] This further ensures that the exhaust valve releases exhaust gas evenly.

[0009] A further technical solution is that, when viewed from above, the moving limit protrusion and the positioning protrusion overlap, and the length of the misaligned portion of the moving limit protrusion and the positioning protrusion is the excess length. The difference between the inner diameter of the positioning protrusion and the diameter of the valve plate is less than the excess length.

[0010] This further ensures uniform exhaust from the exhaust valve and also ensures the airtightness of the exhaust valve after the valve plate is reset.

[0011] In a further technical solution, the movable limit protrusions all point towards the centerline of the valve seat wall.

[0012] A further technical solution is that the longitudinal section of the movable limiting protrusion is trapezoidal or triangular, and the end of the movable limiting protrusion closest to the top wall of the valve cover is the end corresponding to the larger side of the trapezoid or triangle.

[0013] This further ensures that the exhaust valve releases exhaust gas evenly.

[0014] In a further technical solution, the vent hole includes an edge vent hole, which is disposed between two adjacent movable limiting protrusions.

[0015] A further technical solution involves four movable limiting protrusions.

[0016] A further technical solution involves making the valve plate from silicone. Attached Figure Description

[0017] Figure 1 This is a three-dimensional exploded view of an improved one-way exhaust valve according to an embodiment of the present invention. Figure 1 .

[0018] Figure 2 This is a three-dimensional exploded view of an improved one-way exhaust valve according to an embodiment of the present invention. Figure 2 .

[0019] Figure 3 This is a three-dimensional half-sectional schematic diagram of an improved one-way exhaust valve according to an embodiment of the present invention.

[0020] Figure 4 This is a half-sectional schematic diagram of an improved one-way exhaust valve according to an embodiment of the present invention.

[0021] Figure 5 This is a schematic diagram of section SEC1. Line LINE1 represents the circle containing the outer end of the movement limit protrusion 22.

[0022] The accompanying drawings in the specification that best illustrate the technical features of this utility model are: Figure 5 .

[0023] Section 1 (SEC1); Line 1 (LINE1); Valve seat 1; Valve seat wall 11; Air inlet 111; Anti-clogging groove 112; Connecting slot 119; Positioning protrusion 12; Vent groove 121; Positioning protrusion inner diameter 122; Valve seat mounting wall 19; Valve plate 2; Moving cavity 21; Moving limit protrusion 22; Excess length 221; Sealing surface 23; Valve plate diameter 24; Valve cover 3; Valve cover top wall 31; Center vent 311; Edge vent 312; Sealing side wall 32; Side vent groove 321; Connecting buckle 329. Detailed Implementation

[0024] The specific embodiments of this utility model will now be described with reference to the accompanying drawings.

[0025] As a specific embodiment, the improved one-way exhaust valve of this utility model includes a valve seat 1, a valve cover 3, and a cylindrical valve plate 2.

[0026] The valve seat 1 includes a valve seat wall 11 with an air inlet 111. The valve seat wall 11 has a circular cross-section and a corresponding axis. Typically, the valve seat wall 11 is provided with an anti-clogging groove 112. The valve seat 1 also includes a valve seat mounting wall 19 for installation.

[0027] The valve cover 3 includes a top wall 31, the edge of which extends downward to form a sealing side wall 32. The valve seat wall 11 is provided with a connecting groove 119, the outer wall of which is frustum-shaped (i.e., a right trapezoid rotated around its right-angled side). The sealing side wall 32 is provided with a connecting buckle 329, which engages with the connecting groove 119, allowing the valve seat 1 to rotate relative to the valve cover 3. When assembling the one-way exhaust valve, the valve plate 2 is placed on the valve seat 1, and then the valve cover 3 is moved towards the valve seat 1, causing the connecting buckle 329 to elastically deform and engage with the connecting groove 119. This completes the assembly of the one-way exhaust valve without the need for tools or distinguishing the rotation scheme of the valve seat 1 relative to the valve cover 3. Although assembly is convenient, as mentioned in the background section, the rotational orientation of the valve seat 1 relative to the valve cover 3 can affect the exhaust performance of the exhaust valve. The sealing side wall 32 is made of plastic or similar materials and is therefore elastic.

[0028] The valve cover top wall 31 is provided with vent holes, including a central vent hole 311 and / or edge vent holes 312. Typically, the central vent hole 311 has a circular cross-section and is coaxial with the valve seat wall 11, while the edge vent holes 312 are located outside the central vent hole 311 and are evenly distributed around the axis of the valve seat wall 11. Typically, the sealing sidewall 32 has a side vent groove 321 communicating with the edge vent holes 312.

[0029] The valve seat wall 11 is provided with at least three positioning protrusions 12, and a vent groove 121 is provided between the positioning protrusions 12. The valve seat wall 11, the positioning protrusions 12 and the valve cover top wall 31 together form a moving cavity 21. The valve plate 2 is located in the moving cavity 21. The valve plate 2 is in contact with the valve seat wall 11 and covers the air inlet hole 111 (that is, the projection of the air inlet hole 111 on the valve plate 2 is completely located in the valve plate 2 and is in contact with the sealing surface 23).

[0030] The valve cover top wall 31 is provided with at least three strip-shaped movement limiting protrusions 22 facing the valve plate 2 (i.e., the movement limiting protrusions 22 are as shown when viewed from above), and the movement limiting protrusions 22 are evenly distributed around the axis of the valve seat wall 11. It is easy to understand that the space corresponding to the thickness of the movement limiting protrusions 22 can form an exhaust passage and improve the exhaust effect.

[0031] A gap is provided between the valve plate 2 and the movable limiting protrusion 22. This gap allows the valve plate 2 to move towards the top wall 31 of the valve cover, creating a distance between the valve plate 2 and the valve seat wall 11, thus achieving venting. The working principle of the improved one-way venting valve is the same as that disclosed in the prior art CN209839243U, and will not be described again here. Alternatively, the valve plate 2 may be made of silicone or similar material, possessing elasticity and fitting snugly against the movable limiting protrusion 22, relying on the elastic deformation of the valve plate 2 to open and close the valve.

[0032] Referring to the working principle disclosed in existing technology CN209839243U, when gas is generated inside the sealed body (not shown in the attached diagram) and the gas pressure is greater than the atmospheric pressure outside the sealed body, during the upward movement (i.e. towards the top wall 31 of the valve cover) of the valve plate 2 within the moving chamber 21, the three strip-shaped moving limiting protrusions 22 respectively abut against the valve plate 2, ensuring that the valve plate 2 maintains a roughly horizontal posture without flipping over. This results in a relatively uniform gap thickness between the valve plate 2 and the valve seat wall 11, thereby ensuring uniform exhaust and improving the sealing performance of the exhaust valve. Furthermore, regardless of the rotational orientation of the valve seat 1 relative to the valve cover 3, the gap thickness between the valve plate 2 and the valve seat wall 11 remains relatively uniform, ensuring that the exhaust performance of the exhaust valve is not affected by the rotational orientation of the valve seat 1 relative to the valve cover 3, thus facilitating the assembly of the exhaust valve.

[0033] As one specific implementation, the inner surfaces of each positioning protrusion 12 (the side facing the axis of the valve seat wall 11; it is easy to understand that the side of the positioning protrusion 12 away from the valve seat wall 11, which also has an axis, is the outer surface) are all located on the same cylindrical surface. For example, when viewed from above, each positioning protrusion 12 is a concentric fan-shaped ring. The diameter of the inner surface of the positioning protrusion 12 is the inner diameter 122 of the positioning protrusion, and the diameter of the valve plate 2 is the valve plate diameter 24. The valve plate diameter 24 is smaller than the inner diameter 122 of the positioning protrusion, so that there is a gap between the side wall of the valve plate 2 and the inner surface of the positioning protrusion 12. During the exhaust process of the exhaust valve, the side of the valve plate 2 will not contact the inner surface of the positioning protrusion 12, or the valve plate 2 will contact the inner surface of the positioning protrusion 12, but due to the gap between the side wall of the valve plate 2 and the inner surface of the positioning protrusion 12, it will only be subjected to a small frictional force. This can ensure that the valve plate 2 maintains a roughly horizontal posture and moves towards the top wall 31 of the valve cover, thereby further ensuring that the exhaust valve exhausts evenly. When viewed from above, there is an overlap between the movable limiting protrusion 22 and the positioning protrusion 12 (e.g.) Figure 5As shown, when the valve cover 3 rotates relative to the valve seat 1, causing the movable limiting protrusion 22 to rotate to a position within the vent groove 121 when viewed from above, although the movable limiting protrusion 22 and the positioning protrusion 12 do not overlap at this time, as shown by line LINE1, the circle containing the outer end of the movable limiting protrusion 22 overlaps with the positioning protrusion 12 (this is the overlapping part of the movable limiting protrusion 22 and the positioning protrusion 12 when viewed from above). The misaligned part of the movable limiting protrusion 22 and the positioning protrusion 12 when viewed from above (i.e., the movable limiting protrusion 22 and the positioning protrusion 12) The length of the portion (excluding the overlapping part) is the excess length 221. The difference between the inner diameter 122 of the positioning protrusion and the diameter 24 of the valve plate is less than the excess length 221. During the process of the valve plate 2 moving towards the top wall 31 of the valve cover while maintaining a roughly horizontal posture, the inner diameter 122 of each positioning protrusion can abut against the valve plate 2 to ensure that the valve plate 2 always maintains a roughly horizontal posture, which can further ensure the uniform exhaust of the exhaust valve. It can also ensure that the valve plate 2 returns to a roughly horizontal posture and fits against the sealing surface 23, thereby ensuring the airtightness of the exhaust valve after the valve plate 2 returns to a reset position.

[0034] As one specific implementation method, the movable limiting protrusions 22 all point to the axis of the valve seat wall 11, so that the multiple movable limiting protrusions 22 are arranged radially as a whole.

[0035] As one specific implementation, the longitudinal section of the movable limiting protrusion 22 is trapezoidal or triangular. The end of the movable limiting protrusion 22 closest to the top wall 31 of the valve cover is the end corresponding to the larger side of the trapezoid or triangle (i.e., the larger side of the two parallel sides of the trapezoid, i.e., the lower base of the trapezoid, or a side of the triangle whose relative vertex is the larger side). This reduces the contact area between the bottom end of the movable limiting protrusion 22 (i.e., the end where the upper base of the trapezoid is located) and the valve plate 2, so that the posture of the valve plate 2 is determined by multiple movable limiting protrusions 22, rather than by one of them, which further ensures uniform exhaust from the exhaust valve.

[0036] As one specific implementation, the vent includes an edge vent 312, which is disposed between two adjacent movable limiting protrusions 22.

[0037] As one specific implementation method, there are four movable limiting protrusions 22.

[0038] As one specific implementation method, the valve plate 2 is made of silicone.

[0039] The terms used in this invention, such as "first," "second," etc., do not indicate any order, quantity, or importance, but are merely for distinction.

[0040] In this invention, terms such as "a" or "an" are used to indicate not a limitation on the quantity, but rather to indicate the existence of at least one of the mentioned objects.

[0041] In this utility model, terms indicating direction or location such as top, bottom, side, longitudinal, transverse, middle, center, outside, inside, horizontal, vertical, left, right, above, and below are used to indicate relative positions rather than absolute positions.

[0042] Terms used in this invention, such as "approximately," "generally," "approximately," and "similar," are limiting terms used to indicate features that are present but allow for certain deviations. The amount of deviation allowed may vary depending on the specific context; for example, regarding dimensional deviations, the specific context may include, but is not limited to, relevant standards for dimensional tolerances.

Claims

1. An improved one-way exhaust valve, comprising a valve seat (1), a valve cover (3), and a cylindrical valve plate (2); the valve seat (1) includes a valve seat wall (11) with an air inlet (111), the cross-section of the valve seat wall (11) being circular; the valve cover (3) includes a valve cover top wall (31), the edge of which extends downward to form a sealing side wall (32); the valve seat wall (11) is provided with a connecting groove (119), the outer side wall of the connecting groove (119) being frustoconical; the sealing side wall (32) is provided with a connecting... Connecting buckle (329) is inserted into connecting slot (119). The valve cover top wall (31) is provided with an exhaust hole. The valve seat wall (11) is provided with at least three positioning protrusions (12). A vent groove (121) is provided between the positioning protrusions (12). The valve seat wall (11), positioning protrusions (12) and valve cover top wall (31) together form a moving cavity (21). The valve plate (2) is located in the moving cavity (21). The valve plate (2) fits against the valve seat wall (11) and covers the air inlet hole (111). Its characteristics are, The valve cover top wall (31) is provided with at least three strip-shaped moving limit protrusions (22) facing the valve plate (2), and the moving limit protrusions (22) are evenly distributed around the axis of the valve seat wall (11); there is a gap between the valve plate (2) and the moving limit protrusions (22), or the valve plate 2 is elastic and fits against the moving limit protrusions 22.

2. The improved one-way exhaust valve according to claim 1, characterized in that, The inner surfaces of each positioning protrusion (12) are located on the same cylindrical surface. The diameter of the inner surface of the positioning protrusion (12) is the inner diameter of the positioning protrusion (122), and the diameter of the valve plate (2) is the valve plate diameter (24). The valve plate diameter (24) is smaller than the inner diameter of the positioning protrusion (122).

3. The improved one-way exhaust valve according to claim 2, characterized in that, When viewed from above, there is an overlap between the movable limiting protrusion (22) and the positioning protrusion (12). When viewed from above, the length of the misaligned portion between the movable limiting protrusion (22) and the positioning protrusion (12) is the excess length (221). The difference between the inner diameter of the positioning protrusion (122) and the diameter of the valve plate (24) is less than the excess length (221).

4. The improved one-way exhaust valve according to claim 3, characterized in that, The movable limit protrusions (22) all point to the center line of the valve seat wall (11).

5. The improved one-way exhaust valve according to claim 4, characterized in that, The longitudinal section of the movable limiting protrusion (22) is trapezoidal or triangular, and the end of the movable limiting protrusion (22) near the top wall (31) of the valve cover is the end corresponding to the larger side of the trapezoid or triangle.

6. The improved one-way exhaust valve according to claim 3, characterized in that, The vent includes an edge vent (312), which is disposed between two adjacent movable limiting protrusions (22).

7. The improved one-way exhaust valve according to claim 3, characterized in that, There are four movable limit protrusions (22).

8. The improved one-way exhaust valve according to claim 1, characterized in that, The valve plate (2) is made of silicone.

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