Abstract: An air release valve and an air pressure driven toilet water tank drain valve are provided. The air release valve includes a valve seat, a sliding block, and a push block. A bottom of the valve seat is provided with an air release channel, one end of the air release channel is an air inlet, and the other end of the air release channel forms an air release nozzle. The sliding block is located above the air release nozzle and is slidably arranged on the valve seat. The air pressure driven toilet water tank drain valve includes a drain valve body, an inner core tube, a limit device, a telescopic airbag, an air pump, the air release valve, a controller and an electronic induction switch. The air release valve with mechanical structure does not require power consumption and has low cost.

Abstract: Disclosed is a leak-proof device for a water inlet valve. A control valve is installed in a valve body for opening and closing a water inlet channel and a water outlet channel. An outer water tank and a leak-proof water tank are installed on the valve body. An inner water tank is disposed in the outer water tank, with the height of the inner water tank being lower than that of the outer water tank. The leak-proof water tank is in communication with the inner water tank via a water-passing channel A lever is pivotally connected to the valve body. Two ends of the lever are connected with an outer float and an inner float. The inner float is provided with a plug that is movable to block the water-passing channel. The leak-proof float is connected to the control valve.

Abstract: Disclosed is a water stop valve. A water inlet channel, a water outlet channel, and a water sealing surface are formed in a valve body. A valve stem has a middle portion movably disposed in the valve body and a lower portion mounted in a back-pressure hole of a water-plugging stopper. A back-pressure cavity is formed above the water-plugging stopper. A sealing end surface matching the back-pressure hole is formed on the valve stem. When in use, the valve stem drives the water plugging stopper to move downwards, the sealing end surface blocks the back-pressure hole, and the water plugging stopper blocks the water sealing surface, such that the water enters the back-pressure cavity, and the water pressure enables the water-plugging stopper to block the water sealing surface to stop the water. The water stop valve stops a water inlet valve from feeding in water in a timely manner.

Abstract: Disclosed is a leak-proof device for a water inlet valve. A control valve is installed in a valve body for opening and closing a water inlet channel and a water outlet channel An outer water tank and a leak-proof water tank are installed on the valve body. An inner water tank is disposed in the outer water tank, with the height of the inner water tank being lower than that of the outer water tank. The leak-proof water tank is in communication with the inner water tank via a water-passing channel A lever is pivotally connected to the valve body. Two ends of the lever are connected with an outer float and an inner float. The inner float is provided with a plug that is movable to block the water-passing channel. The leak-proof float is connected to the control valve.

Abstract: Disclosed is a water stop valve. A water inlet channel, a water outlet channel, and a water sealing surface are formed in a valve body. A valve stem has a middle portion movably disposed in the valve body and a lower portion mounted in a back-pressure hole of a water-plugging stopper. A back-pressure cavity is formed above the water-plugging stopper. A sealing end surface matching the back-pressure hole is formed on the valve stem. When in use, the valve stem drives the water plugging stopper to move downwards, the sealing end surface blocks the back-pressure hole, and the water plugging stopper blocks the water sealing surface, such that the water enters the back-pressure cavity, and the water pressure enables the water-plugging stopper to block the water sealing surface to stop the water. The water stop valve stops a water inlet valve from feeding in water in a timely manner.

Abstract: A twin water-drainage valve inner core tube starting apparatus includes a button seat, main body, half drainage button, full drainage button, half drainage float, full drainage float, inner core tube and lever, the half drainage float, full drainage float and inner core tube being installed inside the main body to form a half drainage structure and full drainage structure, the button seat being configured on the main body, and the half drainage button and full drainage button being mounted on the button seat, where at least two levers arranged symmetrically are mounted inside the main body, one end of the two levers is abutted against the half drainage button and full drainage button, and another end thereof is in connection with the inner core tube through a pull rod. Whereby, the present invention can reduce the water drainage pressing force and decrease the friction between the components.

Abstract: A major water leak prevention apparatus for a water inlet valve, in which a water receptacle tray is mounted on a water inlet valve body and includes an overflow port. The water receptacle tray has a bottom in which an opening is formed. A counterweight float is mounted on the water inlet valve body and includes a water compartment and a buoyance compartment arranged at a lower end of the water inlet valve body. The bottom opening of the water receptacle tray is connected via a passageway pipe to the counterweight float. The water compartment selectively blocks a lower end opening of the passageway pipe or opens the lower end opening of the passageway pipe. This arrangement helps stop water ingress through the water inlet valve when major water leakage occurs in a water tank.

Abstract: A minor water leak prevention apparatus for a water inlet valve, in which a float is mounted on a regulation bar and received in a water container. The water container is mounted on a siphon tube. The siphon tube is formed with an air aperture. A counterweight buoyance switch is mounted on the water container. The counterweight buoyance switch has a counterweight water compartment having a lower end forming a water drain hole. The counterweight water compartment has an upper end to which a closure pressing plate is mounted. The closure pressing plate is opposite to the air aperture. The counterweight buoyance switch controls opening/closing of the air aperture. This arrangement allows water ingress through a water inlet valve to be stopped when minor water leakage occurs in a water tank.

Abstract: Disclosed is a major water leak prevention apparatus for a water inlet valve, in which a water receptacle tray is mounted on a water inlet valve body and includes an overflow port. The water receptacle tray has a bottom in which an opening is formed. A counterweight float is mounted on the water inlet valve body and includes a water compartment and a buoyance compartment arranged at a lower end of the water inlet valve body. The bottom opening of the water receptacle tray is connected via a passageway pipe to the counterweight float. The water compartment selectively blocks a lower end opening of the passageway pipe or opens the lower end opening of the passageway pipe. This arrangement helps stop water ingress through the water inlet valve when major water leakage occurs in a water tank.

Abstract: Disclosed is a minor water leak prevention apparatus for a water inlet valve. A float is mounted on a regulation bar and received in a water container. The water container is mounted on a siphon tube. The siphon tube is formed with an air aperture. A counterweight buoyance switch is mounted on the water container. The counterweight buoyance switch has a counterweight water compartment having a lower end forming a water drain hole. The counterweight water compartment has an upper end to which a closure pressing plate is mounted. The closure pressing plate is opposite to the air aperture. The counterweight buoyance switch controls opening/closing of the air aperture. This arrangement allows water ingress through a water inlet valve to be stopped when minor water leakage occurs in a water tank.

Abstract: A soft-touch double-drain valve includes a full-drain float including a large water sealing plate covering a water discharging opening and a small water sealing plate mounted in an insertion hole. A main body includes an inner tube through hole and an adjustment hole formed therein. A partial-drain weight float includes a partial-drain adjustment press bar and an inner tube penetration hole. A first position-limiting mechanism is mounted in the main body. A second position-limiting mechanism is mounted to a full-drain push button or a partial-drain push button. An inner tube is inserted in the inner tube penetration hole, the through hole, and the insertion hole and is provided with a return spring and has a lower end operable in combination with the small water sealing plate and an upper end operable in combination with the full-drain and partial-drain push buttons to control downward movement.

Abstract: A twin water-drainage valve inner core tube starting apparatus includes a button seat, main body, half drainage button, full drainage button, half drainage float, full drainage float, inner core tube and lever, the half drainage float, full drainage float and inner core tube being installed inside the main body to form a half drainage structure and full drainage structure, the button seat being configured on the main body, and the half drainage button and full drainage button being mounted on the button seat, where at least two levers arranged symmetrically are mounted inside the main body, one end of the two levers is abutted against the half drainage button and full drainage button, and another end thereof is in connection with the inner core tube through a pull rod. Whereby, the present invention can reduce the water drainage pressing force and decrease the friction between the components.

Abstract: A water inlet valve includes a water sealing piston installed in a water inlet pipe and a top cover. A water storage cylinder is fixed outside the water inlet pipe. A lower water cavity has an upper air vent and a lower water inlet. A siphon is arranged in a water storage cavity and communicated with the lower water cavity. A first magnetic element is arranged on a floater. A small buoy is arranged outside the water storage cylinder to open and close the upper air vent. A gutter is formed on the periphery of the top cover. A lever and an eccentric shaft are arranged outside the water inlet pipe and the top cover. The connecting rod is connected with the lever and the eccentric shaft. The lever is provided with an energy storage spring, a second magnetic element, and a restoring spring.

Abstract: A water inlet valve includes a water sealing piston installed in a water inlet pipe and a top cover. A water storage cylinder is fixed outside the water inlet pipe. A lower water cavity has an upper air vent and a lower water inlet. A siphon is arranged in a water storage cavity and communicated with the lower water cavity. A first magnetic element is arranged on a floater. A small buoy is arranged outside the water storage cylinder to open and close the upper air vent. A gutter is formed on the periphery of the top cover. A lever and an eccentric shaft are arranged outside the water inlet pipe and the top cover. The connecting rod is connected with the lever and the eccentric shaft. The lever is provided with an energy storage spring, a second magnetic element, and a restoring spring.

Abstract: A drain valve base includes an upper connection seat and a lower connection seat which are integrally formed. The upper connection seat is connected with the lower connection seat by connection arms which are provided at intervals, and hollow portions are provided between every two connection arms. A through drain outlet is formed in the center portion of the lower connection seat, and an annular surface is formed on the top of the lower connection seat. A water-seal convex ring is formed on a side part of the annular surface which is adjacent to the inwall of the drain outlet. A water-seal surface is formed on the top of the water-seal convex ring, and blocking devices which can stop water flow are provided on the inner side and the outer side of the water-seal convex ring.

Abstract: A soft-touch double-drain valve includes a full-drain float including a large water sealing plate covering a water discharging opening and a small water sealing plate mounted in an insertion hole. A main body includes an inner tube through hole and an adjustment hole formed therein. A partial-drain weight float includes a partial-drain adjustment press bar and an inner tube penetration hole. A first position-limiting mechanism is mounted in the main body. A second position-limiting mechanism is mounted to a full-drain push button or a partial-drain push button. An inner tube is inserted in the inner tube penetration hole, the through hole, and the insertion hole and is provided with a return spring and has a lower end operable in combination with the small water sealing plate and an upper end operable in combination with the full-drain and partial-drain push buttons to control downward movement.

Abstract: A water leakage protecting device includes a ratchet, a pawl and an auxiliary floater. The ratchet is formed on an outer wall of a floater of a water inlet valve. The auxiliary floater has a floating cavity and a weight cavity therein. The weight cavity has a water drain hole at a bottom thereof. The auxiliary floater is coupled to the water inlet valve through a rotating shaft. The pawl corresponds in position to the ratchet and is connected to one side of the auxiliary floater close to the floater of the water inlet valve. The water leakage protecting device can avoid water waste and ensure toilet safety.

Abstract: A drain valve base includes an upper connection seat and a lower connection seat which are integrally formed. The upper connection seat is connected with the lower connection seat by connection arms which are provided at intervals, and hollow portions are provided between every two connection arms. A through drain outlet is formed in the center portion of the lower connection seat, and an annular surface is formed on the top of the lower connection seat. A water-seal convex ring is formed on a side part of the annular surface which is adjacent to the inwall of the drain outlet. A water-seal surface is formed on the top of the water-seal convex ring, and blocking devices which can stop water flow are provided on the inner side and the outer side of the water-seal convex ring.

Abstract: A water leakage protecting device includes a ratchet, a pawl and an auxiliary floater. The ratchet is formed on an outer wall of a floater of a water inlet valve. The auxiliary floater has a floating cavity and a weight cavity therein. The weight cavity has a water drain hole at a bottom thereof. The auxiliary floater is coupled to the water inlet valve through a rotating shaft. The pawl corresponds in position to the ratchet and is connected to one side of the auxiliary floater close to the floater of the water inlet valve. The present invention can avoid water waste and ensure toilet safety.