Anti-leakage one-way valve

Abstract

The utility model discloses an anti-leakage one-way valve which comprises a valve body and a valve element, and the valve body is provided with a water inlet and a water outlet. The valve element can be movably arranged in an inner cavity of the valve body in the axis direction of the water outlet and divides the inner cavity of the valve body into a first cavity and a second cavity which are not communicated, the first cavity is communicated with the water inlet and the water outlet, and the water inlet and the water outlet are not located on the same axis; a reset piece is arranged between the valve element and the valve body and used for driving the valve element to reset in the direction close to the water outlet so as to seal the water outlet. When water enters the water inlet, the valve element is pushed by water flow to move away from the water outlet so as to open the water outlet. The check valve is simple in structure, reliable in performance and low in cost, the reset force of the reset piece and the negative pressure of the water outlet are in the same direction, and therefore the phenomenon that the valve element is sucked up by the negative pressure to cause leakage can be avoided.

Description

Technical Field

[0001] This utility model relates to a one-way valve, and more particularly to a leak-proof one-way valve. Background Technology

[0002] A novel leak-proof one-way valve structure in the prior art includes a one-way valve inlet shell that is recessed inward to form an annular one-way valve inlet shell support, a one-way valve outlet shell that is recessed inward to form an annular one-way valve outlet shell support and is sleeved inside the one-way valve inlet shell, and a sealing head and a spring that are sequentially engaged in the sealing cavity formed by the sealing of the one-way valve inlet shell and the one-way valve outlet shell. The sealing head is close to the one-way valve inlet shell, and the spring is close to the one-way valve outlet shell. When the outlet end of the one-way valve is full and a negative pressure is formed, the negative pressure and the spring force are in opposite directions. When the negative pressure is greater than the spring force, the sealing gasket of the one-way valve will be sucked up by the negative pressure, resulting in leakage. Utility Model Content

[0003] This utility model addresses the technical problems existing in the prior art by providing a leak-proof one-way valve, which ensures that the reset force of the reset component and the negative pressure at the outlet are in the same direction, thereby preventing the valve core from being sucked up by the negative pressure and causing leakage.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: a leak-proof one-way valve, including a valve body and a valve core, wherein the valve body is provided with an inlet and an outlet; the valve core is movably disposed in the inner cavity of the valve body along the axial direction of the outlet, and divides the inner cavity of the valve body into a first chamber and a second chamber that are not connected, wherein the first chamber is connected to the inlet and the outlet, and the inlet and the outlet are not on the same axis; a reset member is provided between the valve core and the valve body, which is used to drive the valve core to reset towards the outlet to close the outlet; when water enters the inlet, the valve core is pushed by the water flow to move away from the outlet to open the outlet.

[0005] Furthermore, the valve body is provided with a vent hole that connects to the second chamber.

[0006] Furthermore, the vent is located on the side opposite to the water outlet.

[0007] Furthermore, the axis of the inlet and the axis of the outlet are perpendicular to each other.

[0008] Furthermore, the reset element includes an elastic element located within the second chamber and abutting against the valve core and valve body.

[0009] Furthermore, the elastic element is a spring, one end of the valve core is provided with a fixing groove, and a guide post is provided on the inner wall of the valve body corresponding to the fixing groove. One end of the spring is installed in the fixing groove, and the other end is fitted on the outside of the guide post.

[0010] Furthermore, the valve core includes a switching rod, and a first sealing ring is sleeved on the switching rod. The first sealing ring contacts the inner wall surface of the valve body to divide the inner cavity of the valve body into a first chamber and a second chamber. The switching rod is coaxially arranged with the water outlet, and the end of the switching rod near the water outlet is used to block the water outlet.

[0011] Furthermore, the switching rod includes a first section and a second section distributed sequentially along its axial direction. A first sealing ring is fitted on the outer side of the first section, and the second section is located in the first chamber. The end of the second section constitutes one end of the switching rod used to block the water outlet and is fitted with a second sealing ring. The radius of the first section is larger than the radius of the second section, and a stepped surface is formed between the first section and the second section. The area of ​​the stepped surface is larger than the cross-sectional area of ​​the second section.

[0012] Furthermore, the valve body includes a housing and a cover. The housing has an inlet, an outlet and a mounting port. The mounting port and the outlet are located on opposite sides of the housing. The cover is connected to the mounting port of the housing, and the two together form the inner cavity of the valve body. The reset element is fitted between the cover and the valve core.

[0013] Furthermore, the cover is screwed into the mounting opening, and the vent is located on the cover.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The valve core of this utility model is movable in the inner cavity of the valve body along the axial direction of the outlet, and divides the inner cavity of the valve body into a first chamber and a second chamber that are not connected. The first chamber is connected to the inlet and the outlet, and the inlet and the outlet are not on the same axis. A reset member is provided between the valve core and the valve body. The reset member is used to drive the valve core to reset towards the outlet to close the outlet. When water enters the inlet, the valve core is pushed by the water flow to move away from the outlet to open the outlet. This makes the reset force of the reset member and the negative pressure of the outlet in the same direction, thereby avoiding the phenomenon of the valve core being sucked up by the negative pressure and causing leakage. Moreover, the greater the negative pressure, the better the sealing effect of the valve core.

[0016] 2. The valve body is provided with a vent hole that connects to the second chamber, so that the air pressure in the second chamber is balanced with the atmosphere. This makes it easier for the water pressure to drive the valve core. Furthermore, when negative pressure is generated at the outlet, the valve core can be driven by atmospheric pressure, which improves the sealing effect of the outlet.

[0017] 3. The elastic element is a spring. One end of the valve core is provided with a fixing groove, and a guide post is provided on the inner wall of the valve body corresponding to the fixing groove. One end of the spring is installed in the fixing groove, and the other end is fitted on the outside of the guide post to prevent the elastic element from deviating during operation.

[0018] 4. The switching rod includes a first section and a second section distributed sequentially along its axial direction. The radius of the first section is larger than that of the second section, and a stepped surface is formed between the first section and the second section. The area of ​​the stepped surface is larger than the cross-sectional area of ​​the second section, so that the water pressure can push the switching rod to open the outlet.

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the anti-leakage one-way valve of the present invention is not limited to the embodiments. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the present invention. Figure 1 ;

[0021] Figure 2 yes Figure 1 A cross-sectional view along line AA;

[0022] Figure 3 yes Figure 1 A cross-sectional view along line BB;

[0023] Figure 4 yes Figure 1 A cross-sectional view along line CC;

[0024] Figure 5 This is a cross-sectional view of the present invention. Figure 2 (Water entering through the inlet);

[0025] Figure 6 This is a cross-sectional view of the present invention. Figure 3 (Water pressure pushes the switching lever to open the water outlet);

[0026] In the diagram: 1. Valve body; 11. First chamber; 12. Second chamber; 13. Housing; 131. Inlet; 132. Outlet; 133. Mounting port; 14. Cover; 141. Vent hole; 142. Guide post; 2. Switching rod; 21. First section; 211. Mating section; 212. Connecting section; 22. Second section; 23. Fixing groove; 24. First step surface; 25. Second step surface; 3. Spring; 4. First sealing ring; 5. Second sealing ring; 6. Third sealing ring. Detailed Implementation

[0027] In this utility model, the terms "first," "second," and "third," etc., are used only to distinguish similar objects, not to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. The use of terms such as "inner" and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, and is only for the convenience of describing this utility model, not to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, it should not be construed as a limitation on the scope of protection of this utility model. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" refers to two or more. In the description of this utility model, unless otherwise explicitly specified and limited, terms such as "installed," "equipped with," and "connected" should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Please see Figures 1-6 As shown, this utility model discloses a leak-proof one-way valve, comprising a valve body 1 and a valve core. The valve body 1 has an inlet 131 and an outlet 132. The valve core is movably disposed within the inner cavity of the valve body 1 along the axial direction of the outlet 132, dividing the inner cavity of the valve body 1 into a first chamber 11 and a second chamber 12 that are not connected. The first chamber 11 connects the inlet 131 and the outlet 132, and the inlet 131 and the outlet 132 are not on the same axis. A reset member is provided between the valve core and the valve body 1. This reset member is used to drive the valve core to reset towards the outlet 132 to close the outlet 132. When water enters through the inlet 131, the valve core is pushed by the water flow to move away from the outlet 132 to open the outlet 132.

[0030] The valve body 1 is provided with a vent 141 that connects to the second chamber 12. The vent 141 is located on the side opposite to the outlet 132, so that the air pressure in the second chamber 12 is balanced with the atmosphere, which makes it easier for the water pressure to push the valve core. When the outlet 132 generates negative pressure, the valve core can be pushed with the help of atmospheric pressure, thereby improving the sealing effect of the outlet 132.

[0031] Preferably, the axis of the inlet 131 and the axis of the outlet 132 are perpendicular to each other.

[0032] The reset element includes, but is not limited to, an elastic element located within the second chamber 12 and abutting against the valve core and valve body 1. Specifically, the elastic element is a spring 3. One end of the valve core is provided with a fixing groove 23, and a guide post 142 is provided on the inner wall of the valve body 1 corresponding to the fixing groove 23. One end of the spring 3 is installed in the fixing groove 23, and the other end is fitted over the guide post 142.

[0033] The valve core includes a switching rod 2, and a first sealing ring 4 is sleeved on the switching rod 2. The first sealing ring 4 contacts the inner wall of the valve body 1 to divide the inner cavity of the valve body 1 into a first chamber 11 and a second chamber 12. The switching rod 2 is coaxially arranged with the water outlet 132, and the end of the switching rod 2 near the water outlet 132 is used to block the water outlet 132.

[0034] The switching rod 2 includes a first segment 21 and a second segment 22 distributed sequentially along its axial direction. A first sealing ring 4 is fitted on the outer side of the first segment 21. The second segment 22 is located in the first chamber 11, and the end of the second segment 22 constitutes one end of the switching rod 2 used to block the outlet 132, and is fitted with a second sealing ring 5. The radius of the first segment 21 is larger than the radius of the second segment 22, and a stepped surface is formed between the first segment 21 and the second segment 22. The area of ​​the stepped surface is larger than the cross-sectional area of ​​the second segment 22. Specifically, the first segment 21 includes a mating segment 211 and a connecting segment 212. The mating segment 211 is fitted on the outer side with the first sealing ring 4. The connecting segment 212 is located in the first chamber 11 and connects to the second segment 22, and the aforementioned stepped surface is formed between the two for easy distinction. This stepped surface is named the first stepped surface 24. The radius of the mating segment 211 is larger than the radius of the connecting segment 212, and a stepped surface is formed between the mating segment 211 and the connecting segment 212 for easy distinction. This stepped surface is named the second stepped surface 25.

[0035] The valve body 1 includes a housing 13 and a cover 14. The housing 13 has an inlet 131, an outlet 132, and a mounting port 133. The mounting port 133 and the outlet 132 are located on opposite sides of the housing 13. The cover 14 is connected to the mounting port 133 of the housing 13, and the two together form the inner cavity of the valve body 1. Specifically, a third sealing ring 6 is fitted between the cover 14 and the housing 13. The cover 14 is provided with the aforementioned vent holes 141, and there are multiple vent holes 141. A reset member is fitted between the cover 14 and the valve core. Specifically, the cover 14 is provided with the aforementioned guide post 142, and the aforementioned vent holes 141 are also provided through the guide post 142. The cover 14 is screwed into the mounting port 133.

[0036] The principle of this anti-leakage one-way valve is as follows:

[0037] Initial state: such as Figure 1As shown, the switching rod 2 is pressed against the water outlet 132 by the spring 3, and the water outlet 132 and the first chamber 11 are separated by the second sealing ring 5.

[0038] Water inlet and outlet status: Figures 2-4 As shown, the sum of the areas of the first step surface 24 and the second step surface 25 is much larger than the cross-sectional area of ​​the second segment 22. Therefore, as Figure 5 , 6 As shown, water flows into valve body 1 from inlet 131. The upper force-bearing area S1 of switching rod 2 is much larger than the lower force-bearing area S2, and the water pressure F1 at the upper end is much larger than the water pressure F2 at the lower end. As long as the water pressure F1 at the upper end minus the water pressure F2 at the lower end is greater than the force F3 exerted by spring 3 on switching rod 2 and the frictional force F4 of the first sealing ring 4 (F3 is much larger than F4), that is, F1-F2>F3+F4, switching rod 2 will move upward, causing the second sealing ring 5 to move away from outlet 132.

[0039] Water outage state: When the water supply to the inlet 131 stops, the water pressure inside the valve body 1 rapidly decreases to zero pressure, and even negative pressure may occur due to the suction phenomenon. The switching rod 2 moves rapidly downward under the action of the spring 3 until the second sealing ring 5 abuts against the outlet 132, separating the outlet 132 from the first chamber 11 and achieving a sealing effect.

[0040] Anti-siphon principle: When negative pressure is generated at outlet 132, the negative pressure and spring force are in the same direction. The negative pressure will pull the switching rod 2 towards outlet 132. The greater the negative pressure, the better the sealing effect.

[0041] This utility model discloses a leak-proof one-way valve with a simple structure, reliable performance, and low cost. By aligning the reset force of the reset element with the negative pressure at the outlet 132 in the same direction, it avoids the valve core being sucked up by the negative pressure, thus preventing leakage. Furthermore, the greater the negative pressure, the better the sealing effect of the valve core, thereby achieving the purpose of preventing leakage.

[0042] The present invention relates to a leak-proof one-way valve. The parts not described herein are the same as or can be implemented using existing technologies.

[0043] The above embodiments are only used to further illustrate a leak-proof one-way valve of the present invention. However, the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A leak-proof one-way valve, characterized in that: The device includes a valve body and a valve core. The valve body has an inlet and an outlet. The valve core is movably disposed in the inner cavity of the valve body along the axial direction of the outlet, dividing the inner cavity of the valve body into a first chamber and a second chamber that are not connected. The first chamber is connected to the inlet and the outlet, and the inlet and the outlet are not on the same axis. A reset member is provided between the valve core and the valve body. The reset member is used to drive the valve core to reset towards the outlet to close the outlet. When water enters through the inlet, the valve core is pushed by the water flow to move away from the outlet to open the outlet.

2. The leak-proof one-way valve according to claim 1, characterized in that: The valve body is provided with a vent hole that connects to the second chamber.

3. The leak-proof one-way valve according to claim 2, characterized in that: The vent is located on the side opposite to the water outlet.

4. The leak-proof one-way valve according to claim 1, characterized in that: The axis of the inlet and the axis of the outlet are perpendicular to each other.

5. The leak-proof one-way valve according to claim 1, characterized in that: The reset element includes an elastic element located in the second chamber and abutting against the valve core and the valve body.

6. The leak-proof one-way valve according to claim 5, characterized in that: The elastic element is a spring. One end of the valve core is provided with a fixing groove. A guide post is provided on the inner wall of the valve body corresponding to the fixing groove. One end of the spring is installed in the fixing groove, and the other end is fitted on the guide post.

7. The leak-proof one-way valve according to claim 1, characterized in that: The valve core includes a switching rod, and a first sealing ring is sleeved on the switching rod. The first sealing ring contacts the inner wall of the valve body to divide the inner cavity of the valve body into a first chamber and a second chamber. The switching rod is coaxially arranged with the water outlet, and the end of the switching rod near the water outlet is used to block the water outlet.

8. The leak-proof one-way valve according to claim 7, characterized in that: The switching rod includes a first segment and a second segment distributed sequentially along its axial direction. The first segment is fitted with a first sealing ring on its outer side. The second segment is located in the first chamber, and the end of the second segment constitutes one end of the switching rod used to block the water outlet, and is fitted with a second sealing ring. The radius of the first segment is greater than the radius of the second segment, and a stepped surface is formed between the first segment and the second segment. The area of ​​the stepped surface is greater than the cross-sectional area of ​​the second segment.

9. The leak-proof one-way valve according to claim 2, characterized in that: The valve body includes a housing and a cover. The housing has an inlet, an outlet, and a mounting port. The mounting port and the outlet are located on opposite sides of the housing. The cover is connected to the mounting port of the housing, and the two together form the inner cavity of the valve body. The reset member is fitted between the cover and the valve core.

10. The leak-proof one-way valve according to claim 9, characterized in that: The cover is screwed into the mounting opening, and the vent hole is located on the cover.

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