Liquid level valve

A liquid level valve, comprising:

• a valve body internally provided with an active valve cavity vertically extending and a passive valve cavity, wherein a controlled port is arranged on the passive valve cavity;
• an active valve core arranged in the active valve cavity, wherein the active valve core is movable along the active valve cavity, and the active valve core has a first position and a second position within a movement stroke;
• a passive valve core arranged in the passive valve cavity, wherein the passive valve core is movable along the passive valve cavity, and the passive valve core is capable of opening and closing the controlled port through movement;
• a magnetic component comprising an active magnet, a positioning magnet, and a magnetic actuating component respectively arranged on the active valve core, the valve body, and the passive valve core, wherein a magnetic interaction is formed among the active magnet, the positioning magnet, and the magnetic actuating component such that:
• the active valve core is maintained at the first position or the second position after movement thereto, and when the active valve core moves between the first position and the second position, the active valve core is capable of forcing the passive valve core to open and close the controlled port;
• a float ball mechanism comprising a cage component and a trigger float arranged within the cage component, wherein the trigger float, under limitation of the cage component, has a high position floating to a top of the cage component and a low position moving down to a bottom of the cage component;
• a trigger magnet is arranged within the trigger float, when the trigger float descends to the low position, a magnetic attractive force is formed between the trigger magnet and the positioning magnet, and a magnetic repulsive force is formed between the trigger magnet and the active magnet;
• and during a process of the trigger float descending to the low position in response to a liquid level falling to a lower limit liquid level, the magnetic attractive force formed between the trigger magnet and the positioning magnet and the magnetic repulsive force formed between the trigger magnet and the active magnet force the active valve core to move from the second position to the first position;
• and
• a hydraulic mechanism arranged at a bottom of the valve body, wherein the hydraulic mechanism comprises a driving rod and a diaphragm, an upper end of the driving rod extends into the active valve cavity, the diaphragm is configured to respond to a pressure change of a liquid caused by a change of the liquid level;
• and during a process of the diaphragm deforming upward in response to the liquid level rising to an upper limit liquid level, the diaphragm drives the driving rod to force the active valve core to move from the first position to the second position, a magnetic interaction among the trigger magnet, the positioning magnet, and the active magnet changes, and a buoyancy force of the trigger float is at least capable of overcoming the changed magnetic interaction to float from the low position to the high position.