JPWO2021055389A5 - - Google Patents

Claims (9)

A pulse valve assembly,
a cylindrical main valve body; a main valve hole extending along an axis inside the main valve body; and a main valve hole slidably disposed within the main valve hole along the axis to move between a closed position and an open position. a main valve having a main valve spool;
a pilot valve configured to selectively move the main valve spool between the closed position and the open position;
The main valve body includes a plurality of inflow holes extending along an axis and spaced apart laterally and disposed near a circumferential surface of the cylindrical main valve body, each of which is arranged to fluidly communicate with the main valve hole. , comprising an outflow hole disposed radially inward from the plurality of inflow holes, a pilot valve inflow path, a normally closed pilot valve outflow path, and a normally open pilot valve outflow path,
The main valve body includes a first pressure chamber at one end of the main valve hole in fluid communication with the inflow hole and the outflow hole, and a normally open pilot valve outflow passage at an opposite end of the main valve hole. a second pressure chamber in fluid communication;
The main valve spool blocks fluid flow between the inflow hole and the outflow hole when the main valve spool is in the closed position, and blocks fluid flow from the inflow hole to the outflow hole when the main valve spool is in the open position. a main valve member configured to allow fluid flow to the outflow hole;
The pilot valve is configured such that, in a closed position of the pilot valve, fluid communication is possible between the pilot valve inflow passage and the normally open pilot valve outflow passage, thereby pressurizing the second pressure chamber to maintaining a main valve spool in the closed position to prevent fluid flow from the inlet to the outlet;
The pilot valve is configured such that, in the open position of the pilot valve, fluid communication is disabled between the pilot valve inflow passage and the normally open pilot valve outflow passage, and the pilot valve inflow passage and the normally closed pilot valve outflow passage are incapable of fluid communication. The valve is in fluid communication with an outflow channel and is configured to move the main valve spool to the open position to allow fluid flow from the inflow hole to the outflow hole. valve assembly. 2. The pulse valve assembly of claim 1 , wherein the main valve spool is disposed within the second pressure chamber and has a second pressure chamber outlet in communication with the first pressure chamber when the main valve spool is in the closed position. a first piston configured to shield the aperture; and a second piston disposed in the first pressure chamber to seal the outflow aperture when the main valve spool is in the closed position;
When the main valve spool is in the open position, fluid can flow from the second pressure chamber through the second pressure chamber outflow hole into the first pressure chamber, and through the outflow hole into the main valve body. A pulse valve assembly characterized in that the pulse valve assembly is capable of flowing from the valve. 3. The pulse valve assembly of claim 2 , wherein fluid communication is possible between the pilot valve inflow passage and the normally closed pilot valve outflow passage, and the main valve spool is moved to the open position to allow the inflow to flow. The pulse valve assembly is characterized in that when allowing fluid flow from the hole to the outlet hole, the main valve spool is moved in a direction toward the pilot valve to open the second pressure chamber outlet hole. 3. The pulse valve assembly according to claim 2 , when the main valve spool is in the open position, fluid in the first pressure chamber flows in from the plurality of inflow holes and fluid flows in from the second pressure chamber outflow hole. The pulse valve assembly is characterized in that the outflow is allowed to flow from the outflow hole. 3. The pulse valve assembly of claim 2 , further comprising a spring disposed about the main valve spool to bias the main valve spool to the closed position. The pulse valve assembly according to claim 1 , wherein the pilot valve inlet flow path communicates with the plurality of inlet holes. The pulse valve assembly of claim 1 , wherein the normally open pilot valve outlet flow path communicates with the second pressure chamber to maintain the main valve spool in the closed position. 8. The pulse valve assembly of claim 7 , wherein the normally open pilot valve outflow passage is formed in a cavity formed in the main valve body and communicating with the second pressure chamber through an opening partitioning it from the second pressure chamber. A pulse valve assembly characterized in that the pulse valve assembly is in communication with the pulse valve assembly. The pulse valve assembly according to claim 1 , wherein the pilot valve includes a pilot valve body formed with a pilot valve hole in which a pilot valve member is disposed, and wherein the pilot valve member is connected to the pilot valve inlet flow path. and a first position where fluid communication is allowed between the pilot valve inlet flow path and the normally closed pilot valve outflow flow path, and a fluid communication between the pilot valve inflow flow path and the normally closed pilot valve outflow flow path. A pulse valve assembly driven by a solenoid that moves the pilot valve member to and from a second position where communication is permitted.