Water leakage prevention structure of floating ball valve

Abstract

A water leakage prevention structure of a floating ball valve relates to a valve technology and comprises a valve body with a valve, a valve core arranged at a valve port of the valve, and a lever component which drives the valve core to act and is provided with a floating ball, the lever component drives the valve core to seal the valve port, a sealing gasket is sleeved on a valve body part, one end of the sealing gasket leans against the valve body at the root part of the valve, and the other end of the sealing gasket abuts against the valve body at the root part of the valve. A valve opening of the valve penetrates out of the sealing gasket, the distance between the other end of the sealing gasket and the valve opening is set in the way that the valve element abuts against the other end of the sealing gasket while covering and sealing the valve opening to close the floating ball valve, and therefore the valve element cannot continuously move towards the sealing gasket. Compared with the prior art, the water leakage prevention device has the advantage of being capable of preventing water leakage.

Description

Technical Field

[0001] The invention relates to a valve technology, in particular to a water leakage prevention structure of a floating ball valve. Background Art

[0002] As disclosed in patent application CN200610124068.6, the existing float valve includes a valve body with a valve, a valve core arranged in front of the valve, a lever for driving the valve, and a float arranged at the end of the lever. It is characterized in that a seat is arranged on the valve body in front of the valve, the valve core is connected to an L-shaped rod, one end of the L-shaped rod is rotatably connected to the seat below the valve, the fulcrum of the lever is rotatably connected to the seat in front of the live joint of the L-shaped rod, and the free end of the L-shaped rod is placed on the lever.

[0003] In order to ensure that the valve core tightly closes the valve, this type of float valve is truncated cone-shaped. Firstly, the valve part protrudes out of the valve body so that there is sufficient control to install an L-shaped rod outside the valve body. Under the swing drive of the L-shaped rod, the valve core is driven to close the valve port in a form that coincides with the valve axis to avoid loose closure due to the angle between the valve port and the valve core. Secondly, the contact area between the valve core and the valve port is small to ensure sufficient contact pressure to close the valve port.

[0004] Since the valve core relies on a strong lever force to cover the valve opening, and the contact area between the valve core and the valve opening is small, as the number of times the water valve is opened and closed increases, the soft silicone valve core will gradually be squeezed out of a notch by the valve opening; When people adjust the water level during use, they are accustomed to lift the float to operate the water level adjustment structure. At this time, the force used to lift the float is hard, and the force transmitted to the valve core through the lever component is very large. After the valve core acts on the valve port, it is easier for the valve port to squeeze out a notch; Due to the structure of the float valve, the swing of the L-shaped rod will definitely have a certain displacement swing, resulting in the notch not always being directly opposite the valve opening. When the notch slightly deviates from the valve opening, a gap is likely to occur between the notch and the valve opening, causing water leakage. Summary of the invention

[0005] The object of the present invention is to overcome more than one of the above-mentioned disadvantages and to provide a float valve anti-leakage structure that can prevent water leakage.

[0006] The anti-leakage structure of the float valve of the present invention is realized in this way, including a valve body with a valve, a valve core arranged at the valve port of the valve, and a lever member with a float for driving the valve core to move. The valve is in the shape of a tube, and the lever member drives the valve core to close the valve port. The special feature of the present invention is that a sealing gasket is sleeved on the valve body, one end of the sealing gasket rests on the valve body at the root of the valve, and the valve port of the valve passes through the sealing gasket. The distance from the other end of the sealing gasket to the valve port is set in this way. When the valve core covers and closes the valve port to close the float valve, it rests on the other end of the sealing gasket, so that the valve core cannot continue to move toward the sealing gasket.

[0007] When working, as water is injected into the water tank, the water level rises, and the rising water level drives the float to float up, and drives the valve core to the valve port through the lever component. When the water level reaches the set position, the valve core also covers and closes the valve port, and water cannot be injected into the water tank through the float valve; As the water level in the water tank drops (for example, the water in the water tank is boiled to produce steam and then drained away, causing the water level to drop), the float drops, driving the valve core to leave the valve port through the lever component, the valve port opens, and water is injected into the water tank through the float valve; As water is injected, the water in the water tank evaporates and is discharged, and the water level in the water tank fluctuates between the set water level and the low water level. The valve core continuously moves back and forth between leaning against the valve port and leaving the valve port, and the valve core continuously collides with the valve port. Due to the buffering support of the sealing gasket, the valve core is stopped on the other side of the sealing gasket. Even if the middle part of the valve core is deformed and sunken under the action of the driving force, the valve port cannot penetrate into the valve core to form a deep recess, causing leakage. At the same time, the sealing gasket also plays a sealing role, forming a seal between the sealing gasket and the valve core and between the sealing gasket and the valve, further ensuring that the float valve will not leak.

[0008] Preferably, the tubular valve has a truncated cone shape, and the central hole of the sealing gasket is truncated cone-shaped to match the truncated cone-shaped valve. The truncated cone shape is adopted. Firstly, the truncated cone-shaped valve is easy to demould from the mold and easy to manufacture. Secondly, the sealing gasket will be tightly clamped on the valve under the action of the valve core to further ensure the seal.

[0009] Compared with the prior art, the present invention has the advantage of being able to prevent water leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the structure of the floating ball valve for preventing water leakage according to Embodiment 1 of the present invention; Figure 2 Schematic diagram of the structure of the floating ball valve for preventing water leakage in Example 2 of the present invention Figure 3 This is a schematic diagram of the float valve of embodiment 2 of the invention when it is open.

[0011] Explanation of the accompanying numbers: 1-valve; 101-valve port; 2-valve body; 201-water pipe joint; 3-valve core; 4-lever member; 401-float; 402-horizontal L-shaped rod; 4021-vertical rod; 4022-cross rod; 4023-protrusion; 403-lever; 4031-fulcrum; 5-frame; 6-limit block; 7-baffle; 8-valve core positioning seat; 9-valve core positioning hole; 10-inlaid column; 11-sealing gasket; 12-middle through hole. DETAILED DESCRIPTION

[0012] The anti-leakage structure of the float valve of the present invention is now described in further detail in conjunction with the accompanying drawings and embodiments: Example 1: Figure 1 As shown, the anti-leakage structure of the float valve of the present invention comprises a valve body 2 with a valve 1 on the right side, a valve core 3 arranged on the right side of the valve 1, and a lever member 4 driving the valve core 3 to move. The left side of the valve body 2 is a water pipe joint 201. The valve 1 is in a tubular shape. Specifically, the valve 1 is a circular tubular valve. The waterway of the valve 1 is connected to the waterway of the water pipe joint 201. The lever member 4 drives the valve core 3 to close the valve port 101 of the valve 1. The right side of the valve body 2 at the root of the valve 1 is a plane. A frame 5 is arranged on the right side of the valve body 2. The lever member 4 drives the valve core 3 to close the valve port 101 of the valve 1. The rod member 4 includes a float 401, a horizontal L-shaped rod 402, and a lever 403 connected to the float 401 at a free end. The free end of the lower end of the vertical rod 4021 of the horizontal L-shaped rod 402 is rotatably connected to the frame 5 below the valve 1. The fulcrum 4031 of the lever 403 is rotatably connected to the frame 5 on the right side of the horizontal L-shaped rod 402. The horizontal rod 4022 of the horizontal L-shaped rod 402 is placed on the lever 403. A convex portion placed on the lever 403 is provided below the right end of the horizontal rod 4022 of the horizontal L-shaped rod 402. The object 4023 is provided, a limited stopper 6 is provided on the frame 5 below the lever 403, a baffle plate 7 is provided at the right end of the frame 5, a valve core positioning seat 8 is provided on the left side of the vertical rod 4021 of the horizontal L-shaped rod 402, facing the valve port 101, a valve core positioning hole 9 is provided on the left side of the valve core positioning seat 8, and an inlay column 10 is provided on the right side of the valve core 3. The inlay column 10 is inlaid into the valve core positioning hole 9 so that the valve core 3 is fixedly connected to the left side of the vertical rod 4021 of the horizontal L-shaped rod 402. The special feature of the valve 1 is that the valve 1 itself A cylindrical sealing gasket 11 is sleeved on the bottom of the valve body 2, and the material of the sealing gasket 11 is silicone. One end (left end) of the sealing gasket 11 leans against the flat side surface of the valve body 2 at the root of the valve 1, and the valve port 101 of the valve 1 passes through the sealing gasket 11. The distance A from the other end (right end) of the sealing gasket 11 to the valve port 101 is set in this way. When the valve core 3 covers and closes the valve port 101 to close the float valve, the valve core 3 leans against the other end (right end) of the sealing gasket 11, so that the valve core 3 cannot continue to move toward the sealing gasket 11.

[0013] Preferably, the distance A from the other end (right end) of the sealing gasket 11 to the valve opening 101 is 0.5-3 mm.

[0014] Preferably, the distance A from the other end (right end) of the sealing gasket 11 to the valve port 101 is 1-2 mm.

[0015] Determined by the material of the sealing gasket 11 and the use environment (when used in the evaporator water tank, the use environment is high temperature), a small deformation is easy to restore the original shape after the deformation force is eliminated. If the deformation is large (such as the notch is too deep), it is not easy to restore the original shape after deformation. When the distance A from the other end (right end) of the sealing gasket 11 to the valve port 101 is within the range of 0.5-3mm, especially within the range of 1-2mm, it can ensure sealing and at the same time, it can easily restore the original shape after deformation and elimination of the deformation force.

[0016] Example 2: Figure 2 As shown, this embodiment is based on the embodiment 1, the outer shape of the tubular valve 1 is truncated cone-shaped, and the central through hole 12 of the sealing gasket is truncated cone-shaped to match the truncated cone-shaped valve 1.

[0017] like Figure 1 , 2 As shown, when working, as water is injected into the water tank, the water level rises, and the rising water level drives the float 401 to float up, and drives the valve core 401 to the valve port 101 through the lever member 4. When the water level reaches the set position, the valve core 3 also covers and closes the valve port 101, and water cannot be injected into the water tank through the float valve; like Figure 2 As shown, as the water level in the water tank drops (for example, the water in the water tank is boiled to produce steam and discharged, the water level drops), the float 401 drops, driving the valve core 3 to leave the valve port 101 through the lever member 4, the valve port 101 opens, and water is injected into the water tank through the float valve; As water is injected, the water in the water tank evaporates and is discharged, and the water level in the water tank fluctuates between the set water level and the low water level. The valve core 3 continuously moves back and forth between leaning against the valve port 101 and leaving the valve port 101, and the valve core 3 continuously collides with the valve port 101. Due to the buffer support of the sealing gasket 11, the valve core 3 is stopped on the other side of the sealing gasket 11. Even if the middle part of the valve core 3 is deformed and sunken (such as Figure 1 As shown), the valve port 101 cannot be made to penetrate into the valve core 3 to form a deep recess, causing leakage. On the contrary, due to the small deformation, it is easy to restore the original shape (such as Figure 2 As shown), no leakage will occur. At the same time, the sealing gasket 11 also plays a sealing role, forming a seal between the sealing gasket 11 and the valve core 3 and between the sealing gasket 11 and the valve 1, further ensuring that the float valve will not leak.

Claims

1. A floating ball valve anti-leakage structure, comprising a valve body with a valve, a valve core arranged at the valve port of the valve, and a lever member with a floating ball to drive the valve core to move. The valve is in the shape of a tube, and the lever member drives the valve core to close the valve port. It is characterized by A sealing gasket is sleeved on the valve body, one end of the sealing gasket rests on the valve body at the root of the valve, the valve port of the valve passes through the sealing gasket, and the distance from the other end of the sealing gasket to the valve port is set in this way. When the valve core covers and closes the valve port to close the float valve, it rests on the other end of the sealing gasket, so that the valve core cannot continue to move toward the sealing gasket.

2. The anti-leakage structure of the float valve according to claim 1, characterized in that: The outer shape of the tubular valve is in the shape of a truncated cone, and the central perforation of the sealing gasket is in the shape of a truncated cone that matches the truncated cone valve.

3. The anti-leakage structure of the float valve according to claim 1 or 2, characterized in that: The distance from the other end of the sealing gasket to the valve opening is 0.5-3mm.

4. The anti-leakage structure of the float valve according to claim 3, characterized in that: The distance from the other end of the sealing gasket to the valve opening is 1-2mm.

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