Patent Application
20170002555
The present invention relates generally to the technical field of water inlet valves, and more particularly to a minor water leak prevention apparatus for water inlet valves.
Heretofore, a water inlet valve generally comprises a water inlet tube, a top cover, a back pressure pad, a swing arm, a float, and a water container. A lower end of the water inlet tube is mounted to a water supply tube of a water tank. The top cover is set on an upper end on the water inlet tube. The cover is formed with a back pressure hole. The swing arm has a middle section that is pivotally mounted on the top cover. An end of the swing arm corresponds to the back pressure hole and is provided with the back pressure pad. An opposite end of the swing arm is connected to a regulation bar of the float. The float is arranged in the water container and the water container is mounted on the water inlet tube. Sealing members are provided among these components to secure water tightness.
In use, when water level of the water container drops, the float is driven by gravity to descend, causing the swing arm to rotate so that the back pressure pad opens the back pressure hole to allow water that flows through the water supply tube moves through the water inlet tube, the top cover, and the back pressure hole to enter the water tank, achieving water ingress. After the water levels of the water container rises, the float is brought upward by buoyance so as to cause the swing arm to rotate, making the back pressure pad re-close the back pressure hole, whereby a water stop pad generates back pressure expansion to block the water ingress opening, and thus shutting down water ingress.
Such a water inlet valve comprises a water drain hole formed in the bottom of the water container. When the water level of the water tank drops down, water contained in the water container flows through the water drain hole into the water tank to cause the float to lose buoyance and driven by gravity to descend for causing the swing arm to rotate and open the back pressure hole for water ingress. However, after a long period of service, the water tank may get malfunctioning, such as imprecise closure of the discharge valve that leads to slow water leaking (minor water leak). Under such a condition, water is maintained supplied through the water inlet valve and water continuously leaks from the water tank thereby leading to a waster of water resources.
Thus, the present invention aims to improve the structure of the water inlet valve in order to shut down water ingress through the water inlet valve in case of any event of the above-discussed situation.
An object of the present invention is to provide a minor water leak prevention apparatus for a water inlet valve, which stops water ingress through the water inlet valve when minor water leak occurs in a water tank so as to help save water resources.
To achieve the above object, the present invention adopts a solution as follows:
A minor water leak prevention apparatus for a water inlet valve is provided, which is mounted on a water inlet valve body and comprises a swing arm, a regulation bar, a float, a water container, a siphon tube, and a counterweight buoyance switch; the swing arm is rotatably mounted to the water inlet valve body, the swing arm having an end to which a back pressure pad is mounted to correspond to a back pressure hole of the water inlet valve body, the swing arm having an opposite end connected to the regulation bar; the float is mounted on the regulation bar and received in the water container, the water container being mounted on the water inlet valve body; the siphon tube is mounted on the water container, the siphon tube being formed with an air aperture; the counterweight buoyance switch is mounted on the water container, the counterweight buoyance switch comprising a counterweight water compartment and a buoyance water compartment that are independent of each other, the counterweight water compartment having a lower end in which a water drain hole is formed, the counterweight water compartment having an upper end to which a closure pressing plate is provided, the closure pressing plate corresponding to the air aperture, the counterweight buoyance switch controlling opening/closing of the air aperture.
Further, the counterweight buoyance switch is mounted on the siphon tube in an up and down slidable manner, wherein in a condition where buoyance of the counterweight buoyance switch is greater than the gravity thereof, the counterweight buoyance switch slides upward and thus float up thereby opening the air aperture of the siphon tube; and in a condition where the buoyance of the counterweight buoyance switch is smaller than the gravity thereof, the counterweight buoyance switch slides downward and sinks down thereby making the closure pressing plate block the air aperture and thus closing the air aperture of the siphon tube.
Further, the counterweight buoyance switch is rotatably mounted, through a pivot pin, to the water container wherein in a condition where the buoyance of the counterweight buoyance switch is greater than the gravity thereof, the counterweight buoyance switch swings upwards and floats up thereby opening the air aperture of the siphon tube and in a condition where the buoyance of the counterweight buoyance switch is smaller than the gravity thereof, the counterweight buoyance switch swings downward and sinks down, making the closure pressing plate block the air aperture thereby closing the air aperture of the siphon tube.
Further, an air evacuation hole is formed in a lower end portion of the siphon tube, the air evacuation hole being connected, via the passageway pipe, with an air pump, whereby actuating the air pump to evacuate air from the siphon tube releases pressure from the siphon tube so that water of the water container is drained through the siphon tube.
Further, a leverage bar is pivotally connected to the water container, the leverage bar having an end to which a counterweight is mounted and an opposite end that is provided with a closure pad that corresponds to and is mateable with the water egress opening of the siphon tube, the closure pad being opposite to the water egress opening, wherein in a condition where the air pump evacuates air from the siphon tube, the closure pad closes the water egress opening
Further, a link bar is pivotally connected to the water container, the link bar having an end corresponding to the float received in the water container and an opposite end connected to a pull wire, the pull wire being connected to an actuation button, whereby actuating the actuation button pulls the pull wire to make the link bar swing and one end of the link bar depresses the float down to have water contained in the water container drained through the siphon tube.
Also included are a water receptacle tray and a counterweight float, wherein the water receptacle tray is mounted on the water inlet valve body and is located above the water container, the water receptacle tray comprising an overflow port, the overflow port being opposite to the water container, the water receptacle tray having a bottom in which an opening is formed; the counterweight float is mounted on a lower end of the water inlet valve body, the counterweight float comprising a water compartment, a buoyance compartment, and a fixation seat, the water compartment and the buoyance compartment being independent of each other but integrated together, the water compartment and the buoyance compartment being movably mounted on the fixation seat, the fixation seat being mounted on the water inlet valve body, the fixation seat comprising a water discharge opening, the water discharge opening being connected, via the passageway pipe, to the bottom opening of the water receptacle tray; and in a condition where the gravity of the water compartment is greater than buoyance, the water compartment blocks the water discharge opening and in a condition where the gravity of the water compartment is smaller than the buoyance, the water compartment opens the water discharge opening
With the above solution, when water ingress is performed in a normal way, water flows through the water inlet valve body into the water tank and the water level of the water tanks starts to rise so that when the water level of the water tank reaches a highest position of the water container, water flows into the water container. After water level inside the water container rises, the float is acted upon by buoyance to float up thereby driving the swing arm to rotate and making the back pressure pad close the back pressure hole. The expansion of a water sealing pad generates a backward pressure to block water inlet opening and stop water ingress.
Since the siphon tube is formed with the air aperture, after stop of water supply, the water levels in inside and outside tube of the siphon tube are the same. During normal water discharging, since the water level outside the water container of the water inlet valve drops quickly, water contained in the counterweight water compartment of the counterweight buoyance switch is constrained by the water drain hole (small hole) to flow out slowly whereby inside and outside water levels generated during the process of water discharging spontaneously overcome the buoyance from the lower side and changed to gravity to have the opening of the siphon tube blocked. The water level outside the water inlet valve water tank drops and the siphon tube arranged in outside channel is also lowered to generate a pressure difference with respect to the inside channel thereby inducing a siphon effect to automatically drain water from the water container of the water inlet valve (without unlocking device).
When the water tank is continuously suffering minor water leakage (seepage or creep), the water level of the water tank slowly drops down and under this condition, the counterweight buoyance switch is acted upon by the buoyance of the buoyance water compartment, where the buoyance acting on the counterweight buoyance switch is greater than the gravity thereof, the air aperture of the siphon tube is opened, and the siphon effect of the siphon tube is released. In the present invention, the bottom of the water container is not provided with an opening so that the water level inside the water container does not drop and thus, the swing arm is not caused to rotate and the back pressure hole is not opened, whereby the water inlet valve does not allow for water ingress and the water resources can be saved. Under this condition, with the water level of the water tank slowly dropping down and water contained in the counterweight water compartment of the counterweight buoyance switch slowly flowing out through the water drain hole, the water level of the counterweight water compartment is substantially identical to the outside water level. Under this condition, the counterweight buoyance switch is still acted upon by the buoyance of the buoyance water compartment and the buoyance of the counterweight buoyance switch is still greater than the gravity thereof so that the air aperture of the siphon tube is kept open and water level outside the siphon tube drops simultaneously. Continuous dropping of the water level of the water tank eventually drains off the water contained in the counterweight water compartment and the counterweight buoyance switch is acted upon by the gravity to close the air aperture of the siphon tube. Under this condition, the water level of the water tank drops with a greater extent and outside water level of the siphon is lowered to a position close to the air aperture, making it not possible to induce a large suction force and no siphon effect is induced in the siphon tube, so that the water level of the water container is still kept from dropping down. And, thus, water ingress through the water inlet valve is not enabled so as to effectively prevent water leaking and water resources can be saved
The foregoing objectives and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts.
Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.
The following descriptions are exemplary embodiments only, and are not intended to limit the scope, applicability or configuration of the invention in any way. Rather, the following description provides a convenient illustration for implementing exemplary embodiments of the invention. Various changes to the described embodiments may be made in the function and arrangement of the elements described without departing from the scope of the invention as set forth in the appended claims.
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In a condition where buoyance of the counterweight buoyance switch 7 is greater than the gravity thereof, the counterweight buoyance switch 7 slides upward and thus floats up thereby opening the air aperture 63 of the siphon tube 6; and in a condition where the buoyance of the counterweight buoyance switch 7 is smaller than the gravity thereof, the counterweight buoyance switch 7 slides downward and sinks down thereby making the closure pressing plate 712 block the air aperture 63 and thus closing the air aperture 63 of the siphon tube 6.
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When water ingress is performed in a normal way, water flows through the water inlet valve body 1 into the water tank and the water level of the water tanks starts to rise so that, upon reaching a highest position of the water container 5, water flows into the water container 5. After water level inside the water container 5 rises, the float 4 is acted upon by buoyance to float up thereby driving the swing arm 2 to rotate and making the back pressure pad 21 close the back pressure hole 11, whereby water cannot flow through the back pressure hole 11 of the water inlet valve body 1 into the water tank and thus water ingress is stopped.
When the water tank is continuously suffering minor water leakage (seepage or creep), the water level of the water tank slowly drops down and under this condition, the counterweight buoyance switch 7 is acted upon by the buoyance of the buoyance water compartment 72, where the buoyance acting on the counterweight buoyance switch 7 is greater than the gravity thereof, the air aperture 63 of the siphon tube 6 is opened, and the siphon effect of the siphon tube 6 is released. In the present invention, the bottom of the water container 5 is not provided with an opening so that the water level inside the water container 5 does not drop and thus, the swing arm 2 is not caused to rotate and the back pressure hole 11 is not opened, whereby the water inlet valve does not allow for water ingress and the water resources can be saved.
With the water level of the water tank slowly dropping down and water contained in the counterweight water compartment 71 of the counterweight buoyance switch 7 slowly flowing out through the water drain hole 711, the counterweight buoyance switch 7 is still acted upon by the buoyance of the buoyance water compartment 72 and the buoyance of the counterweight buoyance switch 7 is still greater than the gravity thereof so that the air aperture 63 of the siphon tube 6 is kept open and no water ingress is allowed through the water inlet valve.
Continuous dropping of the water level of the water tank eventually drains off the water contained in the counterweight water compartment 71 and the counterweight buoyance switch 7 is acted upon by the gravity to close the air aperture 63 of the siphon tube 6. Under this condition, the water level of the water tank drops with a greater extent and a slower speed, making it not possible to induce is large suction force and no siphon effect is induced in the siphon tube 6, so that the water level of the water container 5 is still kept from dropping down. And, thus, water ingress through the water inlet valve is not enabled and water resources can be saved.
In the present invention, the bottom of the water container 5 is not provided with an opening so that in an event of minor water leak of the water tank, no siphon effect is induced in the siphon tube 6 so that water contained in the water container 5 is hard to drain out and it needs to disassemble the water inlet valve to depress down the float 4 for causing water contained in the water container 5 to discharge through the siphon tube 7 to allow the water inlet valve to enable water ingress.
Thus, the present invention comprises an air evacuation hole 65 formed in a lower end portion of the siphon tube 6. As shown in
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The counterweight float 9 is mounted on a lower end of the water inlet valve body 1. The counterweight float 9 comprises a water compartment 91, a buoyance compartment 92, and a fixation seat 93. The water compartment 91 and the buoyance compartment 92 are independent of each other but are integrated together. The water compartment 91 and the buoyance compartment 92 are movably mounted on the fixation seat 93 and the fixation seat 93 is mounted on the water inlet valve body 1. The fixation seat 93 comprises a water discharge opening 931, and the water discharge opening 931 is connected, via the passageway pipe 83, to the bottom opening 82 of the water receptacle tray 8. In a condition where the gravity of the water compartment 91 is greater than buoyance, the water compartment 91 blocks the water discharge opening 931; and in a condition where the gravity of the water compartment 91 is smaller than the buoyance, the water compartment 91 opens the water discharge opening 931.
In the present invention, the water container 5 has a bottom that does not have an opening When a water tank suffers continuous major water leakage, the water level of the water tank would drop down quickly such that the counterweight buoyance switch 7 descends quickly therewith and the closure pressing plate 712 of the counterweight buoyance switch 7 blocks the air aperture 63 of the siphon tube 6. Under this condition, a siphon effect is induced in the siphon tube 6 and water contained in the water container 5 is completely drained out. The back pressure pad 21 of the swing arm 2 opens the back pressure hole 11 of the water inlet valve body 1 and water flows through the water inlet valve body 1 into the water tank so that the water inlet valve enables water ingress.
The water receptacle tray 8 is mounted on the water inlet valve body 1 and water enters the water receptacle tray 8 and flows via the opening 82 in the bottom of the water receptacle tray 8, further through the passageway pipe 83, into the fixation seat 93. Under this condition, since the water tank is suffering major water leakage, the buoyance compartment 92 would lose buoyance and the water compartment 91 is driven by gravity to block the water discharge opening 931 so that water that flows into the passageway pipe 83 flows backward to pass through the overflow port 81 of the water receptacle tray 8 and enter the water container 5. Since the bottom of the water container 5 does not have an opening, the water level in the water container 5 raises, making the float 4 received in the water container 5 ascend and drive the swing arm 2 to rotate thereby allowing the back pressure pad 21 to close the back pressure hole 11, whereby water cannot flow through the water inlet valve body 1 into the water tank. As such, ingress of water is stopped and water resources can be saved.
It will be understood that each of the elements described above, or two or more together may also find a useful application in other types of methods differing from the type described above.
While certain novel features of this invention have been shown and described and are pointed out in the annexed claim, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the claims of the present invention.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2014/079363 | 6/6/2014 | WO | 00 |
