An exhaust valve

Abstract

The application discloses an exhaust valve, which comprises a seat body, an upper cover and a movable valve core, a first guide structure for guiding the movable valve core to move up and down is arranged between the top of the upper cover and the upper part of the movable valve core, and a second guide structure for guiding the movable valve core to move up and down is arranged between the bottom of the inner cavity and the lower part of the movable valve core; the second guide structure comprises a plug column arranged at the bottom of the movable valve core and a guide hole arranged at the bottom of the inner cavity, the plug column is inserted into the guide hole, and the guide hole deviates from the center of the air inlet. The application has the advantages of smooth up-and-down movement of the hard valve core, simple production process, stable sealing performance, fast air inlet and exhaust speed and small size.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air valves, in particular to an exhaust valve. BACKGROUND

[0002] At present, there are various structures of air valves on the market. The common one is a soft rubber air plug that moves up and down to achieve the exhaust effect. However, it is difficult to control the defective rate of the finished product during the manufacturing of the soft rubber due to the flexible material. Slight deformation can cause the function of a one-way valve.

[0003] The utility model patent with the publication number CN 213017893 U discloses a one-way valve and a vacuum storage bag. The hard rubber valve core finished product is easier to make and shape, and has a high good product rate. The soft rubber can also seal well with the hard rubber valve core. At the same time, the valve can be enlarged in size due to the hard rubber, thereby achieving faster exhaust. However, the center of the valve core bottom of this type of air valve is provided with a larger guide column, which hinders the gas from entering the center of the air inlet, and forces the gas to enter only the two sides of the air inlet. On the one hand, the center guide column significantly reduces the effective air inlet area of the air inlet, resulting in a decrease in the exhaust efficiency of the air valve. On the other hand, research shows that the speed of the gas entering the center of the air inlet is faster than the speed of the gas entering the edge of the air inlet. The center guide column prevents the gas from entering the center of the air inlet, which seriously hinders the exhaust speed.

[0004] The present application is made based on this situation. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provide an exhaust valve that moves up and down smoothly by a hard valve core, has a simple production process, stable sealing performance, fast air inlet and exhaust speed, and small size.

[0006] The present application is achieved by the following technical solutions:

[0007] An exhaust valve, comprising:

[0008] a seat body, which is provided with an inner cavity, and the inner cavity is provided with an air inlet and an air outlet;

[0009] an upper cover, which is installed on the seat body and can be lifted relative to the seat body;

[0010] a movable valve core, which is arranged between the upper cover and the inner cavity and can be lifted between the two to open or close the air inlet;

[0011] a first guide structure for guiding the lifting of the movable valve core is arranged between the top of the upper cover and the upper part of the movable valve core, and a second guide structure for guiding the lifting of the movable valve core is arranged between the bottom of the inner cavity and the lower part of the movable valve core;

[0012] The second guiding structure comprises a plug column arranged at the bottom of the movable valve core and a guiding hole arranged at the bottom of the inner cavity, the plug column is inserted into the guiding hole, and the guiding hole deviates from the center of the air inlet.

[0013] The guiding hole is located at the inner edge of the air inlet.

[0014] The bottom surface and the side surface facing the air inlet of the guiding hole are both open.

[0015] The air inlet is provided with air inlet fins, and the side wall of the guiding hole is formed by upward extension of the air inlet fins.

[0016] The plug column and the guiding hole are both at least two.

[0017] The plug column and the guiding hole are respectively and symmetrically distributed around the center axis of the valve.

[0018] The movable valve core comprises a valve core body, the first guiding structure comprises a guiding convex shaft arranged at the top center of the valve core body, and the top center of the upper cover is provided with a guiding recess into which the guiding convex shaft is inserted and can slide up and down.

[0019] A sunken groove is arranged between the bottom of the guiding convex shaft and the valve core body, and the sunken groove is sunken and can be inserted by the side wall surrounding the guiding recess.

[0020] The side wall of the upper cover is provided with a limiting protrusion, the side wall of the seat body is provided with an inclined guiding groove, the limiting protrusion is embedded into the guiding groove and can move along the guiding groove to perform lifting movement, a recess-shaped or notched mounting groove is arranged above the guiding groove, and the mounting groove extends downward from the upper end of the side wall of the seat body to above the lower end of the guiding groove.

[0021] The periphery of the air inlet is provided with a flexible sealing gasket, the movable valve core is a hard valve core, and when the movable valve core is pressed on the sealing gasket, the movable valve core covers the air inlet.

[0022] Compared with the prior art, the present application has the following advantages:

[0023] 1. In the present application, the valve core body of the movable valve core adopts a plate or cover shape, no center column structure is used between the movable valve core and the air inlet, the guiding hole deviates from the center of the air inlet, the center air inlet is smooth, which is beneficial to increase the effective air inlet area of the air inlet, improve the utilization efficiency of the air inlet area, and improve the exhaust speed.

[0024] 2. The first guide structure and the second guide structure respectively guide the lifting of the movable valve core from the upper and lower positions, so that the movable valve core lifts stably and smoothly without being stuck in the lifting process. The insertion column is inserted into the guide hole to guide the lifting of the movable valve core, and the guide convex shaft is inserted into the guide groove to guide the lifting of the movable valve core, so that the movable valve core lifts stably and smoothly without being stuck.

[0025] 3. The guide hole is located at the inner edge of the air inlet. In this way, on the one hand, the guide hole is arranged at the inner edge of the air inlet, deviating from the center of the air inlet, and the insertion column also deviates from the center of the air inlet, so that the center of the air inlet is avoided, and the gas can be smoothly discharged from the center of the air inlet, and the exhaust speed will be much faster.

[0026] 4. The convex ridge makes the up-and-down sliding of the guide convex shaft in the guide groove more smooth. Specifically, the convex ridge provides a gap for the exhaust between the guide convex shaft and the guide groove, so that the gas in the guide groove can be smoothly discharged, and after the upper cover is lifted, the movable valve core can freely fall without being sucked into the guide groove. The convex ridge is in the up-and-down direction and has a smooth surface, so that the resistance between the guide convex shaft and the guide groove is smaller.

[0027] 5. The upper part of the guide groove is provided with a recess-shaped or notched mounting groove, and the mounting groove extends downward from the upper end of the side wall of the seat body to above the lower end of the guide groove. The mounting groove is used to facilitate the quick installation of the limiting protrusion into the guide groove. That is, during the process of installing the upper cover into the seat body, the limiting protrusion is first aligned and inserted into the mounting groove, and then the upper cover is pressed down, so that the limiting protrusion moves downward along the mounting groove and enters the guide groove. This facilitates the quick docking of the upper cover and the seat body and the quick clamping of the limiting protrusion into the guide groove, and is easy to assemble. The mounting groove is roughly triangular and is formed by thinning the side wall of the seat body. Without the mounting groove, the limiting protrusion can only be aligned with the upper end of the guide groove and then pressed down. If the limiting protrusion is directly pressed from above the lower end of the guide groove, a long distance needs to be overcome, and during the process, the deformation of the upper cover is large due to the thick side wall of the seat body, which may cause the outer periphery of the upper cover to crack during the long installation process. Now, the limiting protrusion can be pressed from any position on the upper side of the guide groove without aligning with the upper end of the guide groove. BRIEF DESCRIPTION OF DRAWINGS

[0028] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings, in which:

[0029] Figure 1 is a perspective view of the present application;

[0030] Figure 2 is an exploded view of the present application;

[0031] Figure 3 This is a 3D structural diagram of the top cover;

[0032] Figure 4 This is a cross-sectional view of the present invention. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] like Figures 1 to 4 An exhaust valve shown includes:

[0035] The seat 1 has an inner cavity 11, and the bottom of the inner cavity 11 has an air inlet 111 and an air outlet 112.

[0036] The upper cover 2 is installed on the base 1 and can be raised and lowered relative to the base 1;

[0037] The movable valve core 4 is located between the bottom of the upper cover 2 and the inner cavity 11 and can move up and down between the two to open or close the air inlet 111. The movable valve core 4 includes a plate-shaped or cover-shaped valve core body 41.

[0038] A first guide structure for guiding the movement of the movable valve core 4 is provided between the top of the upper cover 2 and the upper part of the movable valve core 4, and a second guide structure for guiding the movement of the movable valve core 4 is provided between the bottom of the inner cavity 11 and the lower part of the movable valve core 4.

[0039] The second guide structure includes a post 43 located at the bottom of the movable valve core 4 and a guide hole 12 located at the bottom of the inner cavity 11. The post 43 is inserted into the guide hole 12, and the guide hole 12 is offset from the center of the air inlet 111. Preferably, the post 43 is tapered, wider at the top and narrower at the bottom, to facilitate its vertical sliding. Furthermore, the movable valve core 4 preferably has a rigid structure to provide support for the post 43 located off-center from the center of the movable valve core 4.

[0040] In this invention, the valve core body 41 of the movable valve core 4 is plate-shaped or cap-shaped. There is no central column structure between the movable valve core 4 and the air inlet 111. The guide hole 12 is offset from the center of the air inlet 111, and the air inlet 111 is smoothly ventilated. This is beneficial to increase the effective air intake area of ​​the air inlet 111, improve the utilization efficiency of the air intake area of ​​the air inlet 111, and increase the exhaust speed.

[0041] The first guide structure and the second guide structure guide the lifting of the movable valve core 4 from the upper and lower positions respectively, so that the movable valve core 4 is balanced and stable during lifting and will not be stuck in the lifting process. The plug column 43 is inserted into the guide hole 12 to move up and down, which facilitates the lifting guide of the movable valve core 4. The guide convex shaft 42 is inserted into the guide groove 22 to guide the lifting of the movable valve core 4. In this way, the lifting of the movable valve core 4 is guided from the upper and lower positions respectively, so that the movable valve core 4 is balanced and smooth during lifting and will not be stuck.

[0042] Preferably, in the present application, the seat body 1, the upper cover 2, and the movable valve core 4 are all hard. Especially when the movable valve core 4 is a hard valve core, it can move up and down smoothly and last long. Specifically, the movable valve core 4 is arranged as a hard valve core, which has higher structural strength. That is, the valve core 4 can be made thinner and have a larger cross-sectional size, so that the air inlet 111 can be made larger, and the exhaust volume can be increased. The cross-sectional size of a soft valve core cannot be too large, and the area that can be blocked is limited. At the same time, the hard valve core can also meet the condition that the second guide structure is arranged at a non-central position of the valve core, and the exhaust efficiency can be significantly increased. However, the flexible valve core cannot meet this condition, because if the second guide structure is arranged at the edge of a flexible valve core that is too large, the support strength is insufficient, and the guide function may not be achieved, and the exhaust efficiency cannot be significantly increased. In addition, compared with a flexible valve core such as silica gel, the flexible valve core is relatively rough, and the lifting resistance is larger. However, the hard valve core is smoother and can be lifted more smoothly.

[0043] In a more specific embodiment of the present application, the guide hole 12 is located at the inner edge of the air inlet 111. In this way, on the one hand, the guide hole 12 is arranged at the inner edge of the air inlet 111, which is offset from the center of the air inlet 111. The plug column 43 is also correspondingly offset from the center of the air inlet 111, so that the center of the air inlet 111 is avoided, and the gas can enter the exhaust valve smoothly from the center of the air inlet 111. The air inlet speed will be much faster.

[0044] In a more specific embodiment of the present application, the bottom surface and the side surface facing the air inlet 111 of the guide hole 12 are open. In this way, as shown in the figure, the frame surrounding the guide hole 12 is hollow, that is, the gas can enter from the bottom surface of the guide hole 12 and exit from the side surface, increasing the effective air inlet area of the air inlet 111. Figure 4

[0045] In a more specific embodiment of the present application, the air inlet 111 is provided with an air inlet fin 16, which can effectively prevent foreign matter from entering and avoid blocking the air valve.

[0046] The side wall of the guide hole 12 is formed by extending the air inlet fin 16 upward. That is, the guide hole 12 is surrounded by the fin 16 and the side wall of the air inlet 111, which is convenient for molding and manufacturing, and the structural strength of such a guide hole 12 is higher and is not easy to break and damage, and can last long​

[0047] In a more specific embodiment of the present application, the guide posts 43 and the guide holes 12 are at least two and symmetrically distributed around the center axis of the valve. This can keep the movable valve core 4 stable and prevent it from tilting when it is lifted.

[0048] In a more specific embodiment of the present application, the first guide structure includes a guide protruding shaft 42 arranged at the top center of the valve core body 41, and the top center of the upper cover 2 is provided with a guide groove 22 into which the guide protruding shaft 42 can be inserted and slide up and down. Preferably, the guide protruding shaft 42 is conical with a smaller top and a larger bottom, so that it can slide up and down. Preferably, the outer side wall of the guide protruding shaft 42 is provided with a plurality of convex ridges 421 in the up-and-down direction. The convex ridges 421 can make the guide protruding shaft 42 slide up and down in the guide groove 22 more smoothly. Specifically, the convex ridges 421 provide a gap between the guide protruding shaft 42 and the guide groove 22, so that the gas in the guide groove 22 can be smoothly discharged. After the upper cover 2 is lifted, the movable valve core 4 can freely fall, and the guide protruding shaft 42 is prevented from being stuck in the guide groove 22 and not falling (if the gas in the guide groove 22 cannot be discharged, a negative pressure will be formed between the guide groove 22 and the guide protruding shaft 42 when the guide protruding shaft 42 is lowered, thereby sucking the guide protruding shaft 42); the convex ridges 421 are in the up-and-down direction and have smooth surfaces, so that the resistance between the guide protruding shaft 42 and the guide groove 22 is smaller.

[0049] In a more specific embodiment of the present application, a sunken groove 44 is arranged between the bottom of the guide protruding shaft 42 and the valve core body 41, and the side wall surrounding the guide groove 22 can be inserted into the sunken groove 44. The sunken groove 44 can effectively increase the stroke of the movable valve core 4, i.e., when the valve core body 41 is lifted to the original maximum height (i.e., the lower end of the side wall of the guide groove 22 reaches the position of the top surface of the valve core body 41), the movable valve core 4 can still be lifted by a certain distance because the side wall of the guide groove 22 can still be inserted into the sunken groove 44. This means that under the condition of the same volume, the exhaust passage between the movable valve core 4 and the seat body 1 can be opened larger, and the exhaust speed can be faster. This is also conducive to the miniaturization of the exhaust valve, i.e., under the condition of ensuring the exhaust capacity of the exhaust valve, the exhaust valve can be made smaller.

[0050] Preferably, the outer periphery of the guide groove 22 is further provided with a limiting wall 24 for limiting the maximum insertion depth of the guide protruding shaft 42 in the guide groove 22, so as to prevent the guide protruding shaft 42 from being stuck in the guide groove 22. When the upper cover 2 locks the movable valve core 4, the limiting wall 24 presses the movable valve core 4, and the contact part is on the outer periphery of the valve core body 41, so that the pressure is vertically applied to the outer periphery of the valve core body 41. Since the outer periphery of the valve core body 41 is to be pressed against the sealing gasket 3 (which will be described in detail below), this structure can optimize the force transmission effect and make the outer periphery of the valve core body 41 more tightly buckled on the sealing gasket 3.

[0051] Preferably, the guide groove 22 sidewall and / or the limiting wall 24 are provided with a plurality of notches 221 for balancing air pressure, so that the movable valve core 4 can fall freely after the upper cover 2 rises without being sucked in by the gas. That is, during exhaust, the gas enters the valve from the air inlet 111 and pushes the movable valve core 4 up until the movable valve core 4 hits the limiting wall 24; thus, a certain negative pressure may be formed in the cavity formed between the movable valve core 4, the limiting wall 24 and the upper cover 2, which may prevent the movable valve core 4 from falling when the exhaust ends.

[0052] In a more specific embodiment of the present invention, a limiting protrusion 23 is provided on the side wall of the upper cover 2, and an inclined guide groove 13 is provided on the side wall of the base 1. The limiting protrusion 23 is embedded in the guide groove 13 and can move along the guide groove 13 to perform lifting and lowering activities. When the upper cover 2 is rotated, the limiting protrusion 23 will slide along the inclined second guide groove 13, thereby realizing the lifting and lowering of the upper cover 2. The structure is simple and easy to use.

[0053] In a more specific embodiment of the present invention, the lower end and / or upper end of the guide groove 13 are provided with vertically oriented locking posts 131, and the limiting protrusion 23 is provided with a locking groove 231 into which the locking posts 131 can be engaged. When the limiting protrusion 23 slides to the lower end and / or upper end of the guide groove 13, the locking posts 131 will engage in the groove 231 to lock the lifting and lowering of the upper cover 2.

[0054] In a more specific embodiment of the present invention, a recessed or notched mounting groove 14 is provided above the guide groove 13, and the mounting groove 14 extends downward from the upper end of the side wall of the base 1 to above the lower end of the guide groove 13. Preferably, the mounting groove 14 is located above the lower end of the guide groove 13. Figure 2 As shown, the mounting groove 14 is designed to facilitate the quick installation of the limiting protrusion 23 into the guide groove 13. Specifically, during the process of installing the upper cover 2 onto the base 1, the limiting protrusion 23 is first aligned with and inserted into the mounting groove 14. Then, the upper cover 2 is pressed down, causing the limiting protrusion 23 to move downwards along the mounting groove 14 and enter the guide groove 13. This facilitates quick and easy connection between the upper cover 2 and the base 1, and allows the limiting protrusion 23 to be quickly snapped into the guide groove 13, making assembly easier. The mounting groove 14 is roughly triangular in shape and is formed by thinning the side wall of the base 1. Without the mounting groove 14, the limiting protrusion 23 can only be aligned with the upper end of the guide groove 13 before being pressed down. If it were to be pressed directly into the guide groove 13 from above the lower end, a relatively long distance would need to be overcome. During this process, the thicker side wall of the base 1 would cause significant deformation of the upper cover 2. Maintaining such significant deformation for an extended period during installation could easily lead to cracks on the outer periphery of the upper cover 2. Now, there is no need to align it with the upper end of the guide groove 13; it can be pressed in from any point on the upper side of the entire guide groove 13.

[0055] In a more specific embodiment of the present application, a flexible sealing gasket 3 is arranged around the air inlet 111, and when the movable valve core 4 is pressed against the sealing gasket 3, the movable valve core 4 covers the air inlet 111. That is, when the valve core body 41 closes the air inlet 111, the valve core body 41 is pressed against the sealing gasket 3, thereby increasing the sealing performance between the valve core body 41 and the bottom of the inner cavity 11, preventing air leakage. Preferably, a downwardly protruding side wall is arranged around the valve core body 41 (i.e. the valve core body 41 is in the shape of a cover), and when the valve core body 41 closes the air inlet 111, the side wall first contacts the sealing gasket 3 to form a seal, ensuring good sealing effect.

[0056] The sealing gasket 3 is preferably made of rubber or silicone material.

[0057] In a preferred embodiment of the present application, the seat body 1 is provided with a receiving groove 15 at the bottom to accommodate the sealing gasket 3, for mounting and fixing the sealing gasket 3.

[0058] Obviously, the above-described embodiments of the present application are merely exemplary and are not intended to limit the embodiments of the present application. Based on the above description, other different forms of changes or modifications can be made by those skilled in the art. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. An exhaust valve characterized by, The utility model relates to a valve, including: The seat body (1) is equipped with the inner chamber (11) on the seat body (1), and the inner chamber (11) is equipped with the air inlet (111) and the air outlet (112); The upper cover (2) is installed on the seat body (1) and can be lifted relative to the seat body (1); The movable valve core (4) is arranged between the upper cover (2) and the inner chamber (11) and can be lifted between the two to open or close the air inlet (111); The top of the upper cover (2) and the upper part of the movable valve core (4) are equipped with the first guide structure for the lifting guide of the movable valve core (4), and the bottom of the inner chamber (11) and the lower part of the movable valve core (4) are equipped with the second guide structure for the lifting guide of the movable valve core (4); The second guide structure includes the insertion column (43) arranged at the bottom of the movable valve core (4) and the guide hole (12) arranged at the bottom of the inner chamber (11), the insertion column (43) is inserted in the guide hole (12), and the guide hole (12) deviates from the center of the air inlet (111); The movable valve core (4) includes the valve core body (41), the first guide structure includes the guide convex shaft (42) arranged at the top center of the valve core body (41), and the top center of the upper cover (2) is equipped with the guide recess (22) for the insertion and up-down sliding of the guide convex shaft (42); The bottom of the guide convex shaft (42) and the valve core body (41) are equipped with the sunken groove (44) that can be inserted into the side wall surrounding the guide recess (22) and is sunken; The outer side wall of the guide convex shaft (42) is equipped with a plurality of convex ridges (421) in the up-down direction; The periphery of the guide recess (22) is further equipped with the limiting wall (24) for limiting the maximum insertion depth of the guide convex shaft (42) in the guide recess (22); The side wall of the guide recess (22) and / or the limiting wall (24) is equipped with a plurality of notches (221) for balancing air pressure.

2. An exhaust valve according to claim 1, wherein: The guide hole (12) is located at the inner edge of the air inlet (111).

3. An exhaust valve according to claim 2, wherein: The bottom surface and the side surface towards the air inlet (111) of the guide hole (12) are both open.

4. An exhaust valve according to claim 3, wherein: The air inlet (111) is provided with an air inlet fin (16), and the side wall of the guide hole (12) is formed by the upward extension of the air inlet fin (16).

5. An exhaust valve according to any one of claims 1 to 4, wherein: The insertion column (43) and the guide hole (12) are at least two.

6. An exhaust valve according to claim 5, wherein: The insertion column (43) and the guide hole (12) are respectively and symmetrically distributed around the center axis of the valve.

7. An exhaust valve according to claim 1 wherein: The side wall of the upper cover (2) is equipped with the limiting protrusion (23), the side wall of the seat body (1) is equipped with the inclined guide groove (13), the limiting protrusion (23) is embedded in the guide groove (13) and can move along the guide groove (13) to lift, the upper part of the guide groove (13) is equipped with the recess-shaped or notch-shaped mounting groove (14), and the mounting groove (14) extends from the upper end of the side wall of the seat body (1) to the upper part of the lower end of the guide groove (13).

8. An exhaust valve according to any one of claims 1-4, 7, characterized in that: The periphery of the air inlet (111) is equipped with a flexible sealing gasket (3), the movable valve core (4) is a hard valve core, and when the movable valve core (4) is pressed on the sealing gasket (3), the movable valve core (4) covers the air inlet (111).

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