Plug valve capable of automatically discharging dust

Abstract

The utility model discloses a plug valve of automatic discharge of dust, belongs to plug valve technical field, including valve body, the one side of valve body sets up outer frame, and the outer frame is fixed with the cylinder outside, and the cylinder piston rod is connected the valve plate in the outer frame inside, and the outer frame top is fixed with the cover plate, is set up to the valve body and is opened and is arranged the dust discharging port, and the dust discharging port bottom and both sides are connected the seal shell, and the seal shell top is connected with the cover plate, and forms the dust discharging chamber between the outer frame and the seal shell, the sweep port of the sweep gas pipe is set up to the cover plate, and the pneumatic valve is set up on the sweep gas pipe, and the cylinder is connected with the instrument gas pipe, and the solenoid valve is set up on the instrument gas pipe, and the solenoid valve includes P port, A port, B port, and P port connects the instrument gas pipe, and A port connects the cylinder first gas port, and B port connects the cylinder second gas port, and A port and first gas port connection gas pipe lead out a road connection pneumatic valve actuator, when the cylinder drives the valve plate and opens the valve, and the sweep port blows the gas to the cover plate and blows the dust to the dust discharging chamber and blows out from the dust discharging port, avoids the dust and gathers on the valve plate upside and downside.

Claims

1. A slide gate valve for automatically discharging leaking ash, characterized in that, The valve body includes a valve plate opening, an outer frame with an open end fixed to both sides of the valve plate opening, and a cylinder fixed to the outside of the closed end. The piston rod of the cylinder passes through the outer frame and connects to the valve plate that slides inside the outer frame. The top of the outer frame is fixed with a cover plate, the bottom of the opening is fixed with a sealing plate, the valve plate passes between the cover plate and the sealing plate, and a sealing gasket is provided between the cover plate or sealing plate and the sealing shell. The valve body is also provided with a ash discharge port, which is located below the valve plate opening on the same side. The bottom and both sides of the ash discharge port are connected to a sealing shell, and the top of the sealing shell is connected to the cover plate, forming an ash discharge cavity between the outer frame and the sealing shell. The cover plate has a purge port for connecting to the purge air pipe, and the purge air pipe is equipped with a pneumatic valve; The cylinder is connected to the instrument air pipe, and a solenoid valve is installed on the instrument air pipe. The solenoid valve includes a P port, an A port, and a B port. The P port is connected to the instrument air pipe, the A port is connected to the first air port of the cylinder, and the B port is connected to the second air port of the cylinder. A path is led out from the air pipe connecting the A port and the first air port to the actuator of the pneumatic valve. The first air port is located on the side of the cylinder facing the valve body.

2. The automatic dust discharging gate valve according to claim 1, wherein The purge port is located at the end of the cover plate away from the valve body.

3. The self-draining dust boot plug valve of claim 1, wherein, The end of the sealing shell connected to the closed end of the outer frame is higher than the end of the sealing shell connected to the open end of the outer frame, so that the ash discharge chamber is inclined.

4. The self-draining dust boot plug valve of claim 1, wherein, The valve plate includes a flat plate and a semi-circular plate connected together. The width of the flat plate is equal to the diameter of the valve body, and the diameter of the semi-circular plate is equal to the diameter of the valve body. The length of the valve plate is greater than three times the radius of the valve body.

5. The self-draining dust boot plug valve of claim 4, wherein, When the valve is opened, the end of the semicircular plate away from the flat plate coincides with the side wall of the valve body; one end of the sealing plate is connected to the valve body, and the other end matches the joint of the semicircular plate and the flat plate, and the sealing gasket is set at the end of the sealing plate away from the valve body.

6. The automatic ash discharge gate valve as described in claim 4, characterized in that, The length of the valve plate is less than the length of the outer frame, and the length of the outer frame is greater than five times the radius of the valve body. When the valve body valve is opened, the plate will not block the purge port.

7. The self-draining dust boot plug valve of claim 4 wherein, A cylinder connecting base is fixedly installed on the outside of the closed end of the outer frame, and piston rod holes are opened at the corresponding positions of the closed end of the outer frame and the cylinder connecting base. The piston rod extends into the push rod hole and connects with the plate.

8. The self-draining dust boot plug valve of claim 1, wherein, The solenoid valve is a two-position five-way valve, and also includes ports R1 and R2, with ports R1 and R2 each connected to a venting silencer.

9. The self-draining dust boot plug valve of claim 8, wherein, The solenoid valve is connected to a switch controller to control the valve's on / off state.

10. The self-draining dust boot plug valve of claim 1, wherein, An inspection port is provided on the cover plate, and the cover plate is connected to an inspection cover by bolts to cover the inspection port.

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