An improved valve structure for a float valve

Abstract

An improved structure of a float valve is disclosed, relating to valve technology. The valve body includes a valve body with a valve core and a float drive mechanism that drives the valve core. The valve core is located at the inlet end of the valve body and can rotate around its axis. The float drive mechanism includes a float and a connecting rod. The connecting rod passes through the outlet end of the valve body and is fixedly connected to the valve core's axis. The float directly or indirectly drives the connecting rod to swing up and down. An annular sealing gasket is provided on the end face of the inlet end of the valve body. The valve core is made of a rigid material that is not easily deformed and rests against the annular sealing gasket. The valve core is disc-shaped, with an arc-shaped edge on its periphery. Compared with existing technologies, this invention has the advantage of preventing damage to the annular sealing gasket when the valve core flips open.

Description

Technical Field

[0001] This utility model relates to valve technology, and in particular to an improved structure of a float valve. Background Technology

[0002] As disclosed in patent application 201810148671.0, the existing float valve opens the valve by rotating the valve core at the inlet end of the valve port along its upper edge through a lever that extends through the outlet end of the valve port. Its structure includes a valve body with a valve core and a float drive part that drives the valve core to move. The valve core is located at the inlet end of the valve body. The float drive part includes a float and a connecting rod. The float swings up and down in front of the valve core drive connecting rod. The connecting rod passes through the outlet end of the valve body and is fixedly connected to the valve core that can rotate freely along the axis. An annular sealing gasket is provided on the end face of the inlet end of the valve port. The valve core 1 is made of a hard material that is not easily deformed.

[0003] During operation, when the water level in the pool is lower than the set level, the float falls downwards under its own weight, causing the connecting rod to swing downwards. The connecting rod then causes the valve core to flip open along its upper fulcrum, causing the valve core's central axis to deviate from the valve port's central axis. The valve core's central axis and the valve port's central axis form an angle, causing the lower end of the valve core to leave the valve port. After the lower end of the valve port opens, water enters through this gap. The thrust of the entering water partially offsets the thrust of the water on the valve core. Thus, under the influence of the float's weight, the gap remains open, thereby opening the float valve and injecting water into the pool. Because the valve core flips open along its upper fulcrum on the annular sealing pad, the force at the fulcrum is concentrated on the annular sealing pad when it flips open. The edge of the valve core in existing technology is a right-angle edge, so when it flips open, it is easy to damage the annular sealing pad at the fulcrum.

[0004] Furthermore, the force on the connecting rod is a torque force with the upper end of the valve core as the fulcrum. Therefore, the force required to open the valve is very small. Thus, a very short connecting rod and a very small float can meet the force requirements. When the injected water brings the water level in the pool to the set level, the connecting rod swings upward under the action of the float, making the central axis of the valve core parallel to the central axis of the valve opening. Driven by the incoming water, the gap disappears, the valve core moves towards the valve opening, and completely closes the valve opening again. Although this technology requires only a small force to be applied to the connecting rod to flip the valve core and open the valve, it is constrained by the valve opening and the position of the connecting rod at the center of the valve core. The valve core can only flip by a very small angle, which greatly restricts the flow rate of water through the open valve. Utility Model Content

[0005] The purpose of this invention is to improve the structure of a float valve that overcomes one or more of the above-mentioned disadvantages and prevents damage to the annular sealing gasket when the valve core is flipped open.

[0006] The improved structure of the float valve of this utility model is achieved as follows: it includes a valve body with a valve core and a float drive part that drives the valve core to move. The float drive part includes a float and a connecting rod. The connecting rod passes through the water outlet end of the valve body and is fixedly connected to the valve core shaft. The float directly or indirectly drives the connecting rod to swing up and down. An annular sealing pad is provided on the end face of the water inlet end of the valve port. The valve core is made of a hard material that is not easily deformed and rests on the annular sealing pad. The valve core is located at the water inlet end of the valve body and can rotate around the axis and flip along the edge of the valve core resting on the annular sealing pad. Its special feature is that the valve core is disc-shaped and the peripheral edge of the disc-shaped valve core is an arc edge.

[0007] During operation, when the float drives the oscillation, causing the valve core to flip along its fulcrum edge, the circumference of the disc-shaped valve core is arc-shaped. Thus, when the valve core flips along its fulcrum edge on the annular sealing pad, the contact between the fulcrum and the annular sealing pad is a surface contact rather than a line contact. This avoids the damage to the annular sealing pad caused by the line contact between the right-angle edge of the valve core and the annular sealing pad in existing technologies.

[0008] Preferably, the periphery of the side of the annular sealing pad facing the valve core is inclined, and the size of the valve core is set such that the projected surface of the valve core extends directly to the inclined surface around the annular sealing pad.

[0009] When in operation, the float swings, causing the valve core to flip along its fulcrum edge. This fulcrum edge then slides into the inclined plane, increasing the angle of the valve core's flip and thus increasing the valve opening and water flow.

[0010] The disc-shaped valve core has an arc-shaped edge, which makes it easier for the fulcrum edge of the valve core to slide into the inclined surface.

[0011] Preferably, the periphery of the annular sealing gasket facing the valve core is an arc-shaped bevel. This arc-shaped bevel serves two purposes: firstly, it allows the valve core to slide smoothly into the bevel; secondly, it effectively increases the angle at which the valve core tilts.

[0012] Compared with existing technologies, this invention has the advantages of requiring only a small amount of force to flip the valve core and open the valve, preventing damage to the annular sealing gasket when the valve core is flipped open, and having a large valve core flipping angle, which significantly increases the flow rate of water through the open valve. Attached Figure Description

[0013] Figure 1 for Figure 2 AA section view;

[0014] Figure 2 This is a schematic diagram of the valve structure of the float valve of this utility model;

[0015] Figure 3 for Figure 1 A diagram showing the valve when it is open;

[0016] Figure 4 This is a comparison diagram showing the state of the valve core when it slides into the inclined surface and when it flips along the surface of the sealing pad.

[0017] Explanation of reference numerals: B - axis; C - fulcrum edge; 1 - valve core; 101 - positioning column; 102 - arc-shaped edge; 2 - valve body; 201 - valve port; 202 - inlet end; 203 - outlet end; 204 - cavity; 3 - float drive part; 301 - float; 302 - connecting rod; 303 - rocker arm; 4 - annular sealing pad; 401 - inclined surface; 402 - center hole; 5 - valve core centering mechanism. Detailed Implementation

[0018] The improved structure of the float valve of this utility model will now be described in further detail with reference to the accompanying drawings and embodiments:

[0019] like Figure 1 , 3 As shown, the improved structure of the float valve of this utility model includes a valve body 2 with a valve core 1 and a float drive part 3 that drives the valve core 1. The float drive part 3 includes a float 301 and a connecting rod 302. The connecting rod 302 passes through the outlet end 203 of the valve port 201 of the valve body 2 and is fixedly connected to the axis of the valve core 1. The float 301 drives the connecting rod 302 to swing up and down directly or indirectly through the rocker arm 303. An annular sealing pad 4 is provided on the end face of the inlet end of the valve port 201. The valve core 1 is made of a hard material that is not easily deformed and rests on the annular sealing pad 4. The valve core 1 is located at the inlet end 202 of the valve port 201 of the valve body 2 and can rotate around the axis B and flip along the edge of the valve core 1 on the annular sealing pad 4. Its special feature is that the valve core 1 is disc-shaped and the peripheral edge of the disc-shaped valve core 1 is an arc edge 102.

[0020] Preferably, the outer periphery of the disc-shaped valve core 1 is an arc surface.

[0021] Preferably, the periphery of the side of the annular sealing pad 4 facing the valve core 1 is a slope 401, and the size of the valve core 1 is set such that the projected surface of the valve core 1 extends directly to the slope 401 around the annular sealing pad 4.

[0022] Preferably, the periphery of the annular sealing gasket 4 facing the valve core is an arc-shaped bevel 401.

[0023] Preferably, the cavity 204 of the inlet end 202 of the valve port 201 of the valve body 2 is a circular hole, and the maximum diameter of the annular sealing pad 4 matches the diameter of the circular hole, so that the annular sealing pad 4 cannot move in a direction perpendicular to the axis under the constraint of the circular hole. The valve port 201 is a small circular hole, the valve port 201 is located at the center of the circular hole, the diameter of the valve port 201 is smaller than the diameter of the circular hole, and the diameter of the central hole 402 of the annular sealing pad 4 matches the diameter of the valve port 201.

[0024] Preferably, the diameter of the valve core 1 is set such that, constrained by the wall of the cavity 204 of the inlet end 202 of the valve port 201 or the wall of the central hole 402 of the annular sealing pad 4, the valve core 1 completely covers the central hole 402 of the annular sealing pad 4.

[0025] The valve in this patent application opens and closes by using a connecting rod 302 to drive the valve core 1, which is in a free state and can rotate along its axis, to flip along its edge. The force driving the connecting rod 302 is perpendicular to the axis of the connecting rod 302. Therefore, a force perpendicular to the axis acts on the valve core 1. The valve core 1 uses the friction between itself and the annular sealing gasket 4 to drive the annular sealing gasket 4 to overcome the friction between the annular sealing gasket 4 and the valve port 201 and move in a direction perpendicular to the axis. This causes the annular sealing gasket 4 to cover the valve port 201. This problem is solved by matching the maximum diameter of the annular sealing gasket 4 with the diameter of the circular hole of the cavity 204 of the inlet end 202 of the valve port 201.

[0026] The valve core 1 is disc-shaped, and its diameter is designed to completely cover the central hole 402 of the annular sealing gasket 4. In this way, even if the valve core 1 is offset in a direction perpendicular to the axis under the action of a force perpendicular to the axis, the valve core 1 can still completely cover the valve port 201 to prevent water leakage.

[0027] Preferably, a valve core centering mechanism 5 is provided (such as a tower spring, with the bottom end of the tower spring positioned at the water inlet end of the cavity 204 of the valve port 201, and the top end of the tower spring sleeved on the positioning post 101 of the valve core 1). Through the valve core centering mechanism 5, when the valve core 1 closes the valve, its center is maintained on the axis B, preventing the valve core 1 from deviating from the axis B and causing water leakage.

[0028] like Figure 3 , 4As shown, during operation, when the float 301 drives the oscillation, causing the valve core 1 to flip along its fulcrum edge C, since the peripheral edge of the disc-shaped valve core 1 is an arc-shaped edge, when the valve core 1 flips along its fulcrum edge C on the annular sealing pad 4, the contact between the fulcrum and the annular sealing pad 4 is a surface contact rather than a line contact, thus avoiding the damage to the annular sealing pad 4 caused by the line contact between the right-angle edge of the valve core 1 and the annular sealing pad 4 in the prior art.

[0029] When the float 301 drives the connecting rod 302 to swing through the rocker arm 303, causing the valve core 1 to flip along its fulcrum edge C, the fulcrum edge C will slide into the inclined plane 401, increasing the angle of the valve core 1 flipping, thereby increasing the opening degree of the valve port 201 (increasing the width at points D and E), and increasing the water flow.

Claims

1. An improved structure of a float valve, comprising a valve body with a valve core and a float drive part for driving the valve core, the float drive part including a float and a connecting rod, the connecting rod passing through the outlet end of the valve body and fixedly connected to the valve core shaft, the float directly or indirectly driving the connecting rod to swing up and down, an annular sealing pad being provided on the end face of the inlet end of the valve body, the valve core being made of a hard material that is not easily deformed and resting against the annular sealing pad, the valve core being located at the inlet end of the valve body and capable of rotating around an axis and flipping along the edge of the valve core resting against the annular sealing pad, characterized in that, The valve core is disc-shaped, and the peripheral edge of the disc-shaped valve core is arc-shaped.

2. The improved structure of the float valve according to claim 1, characterized in that, The outer periphery of the disc-shaped valve core is an arc surface.

3. The improved structure of the float valve according to claim 1 or 2, characterized in that, The periphery of the annular sealing gasket facing the valve core is beveled. The valve core is sized in such a way that its projected surface extends directly to the beveled periphery of the annular sealing gasket.

4. The improved structure of the float valve according to claim 3, characterized in that, The periphery of the annular sealing gasket facing the valve core is an arc-shaped bevel.

5. The improved structure of the float valve according to claim 1, 2, or 4, characterized in that, The inlet cavity of the valve body is a circular hole. The maximum diameter of the annular sealing gasket matches the diameter of the circular hole, so that the annular sealing gasket cannot move in a direction perpendicular to the axis under the constraint of the circular hole. The valve port is a small circular hole, located at the center of the circular hole. The diameter of the valve port is smaller than the diameter of the circular hole. The diameter of the central hole of the annular sealing gasket matches the diameter of the valve port.

6. The improved structure of the float valve according to claim 5, characterized in that... The valve core diameter is set in such a way that, constrained by the wall of the cavity at the inlet end of the valve or the wall of the central hole of the annular sealing pad, the valve core completely covers the central hole of the annular sealing pad.

7. The improved structure of the float valve according to claim 1, 2, 4, or 6, characterized in that, The valve core is equipped with a centering mechanism. This mechanism ensures that the valve core remains centered on the axis when the valve is closed, preventing leakage caused by the valve core deviating from the axis.

8. The improved structure of the float valve according to claim 3, characterized in that, The valve core is equipped with a centering mechanism. This mechanism ensures that the valve core remains centered on the axis when the valve is closed, preventing leakage caused by the valve core deviating from the axis.

9. The improved structure of the float valve according to claim 5, characterized in that, The valve core is equipped with a centering mechanism. This mechanism ensures that the valve core remains centered on the axis when the valve is closed, preventing leakage caused by the valve core deviating from the axis.

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