VALVE FOR POWDER

• US 20120037833A1
• Filed: 03/26/2009
• Published: 02/16/2012
• Est. Priority Date: 03/26/2009
• Status: Abandoned Application

• Current Assignee: Mitsui Engineering & Shipbuilding Company Limited (Mitsui E&S Holdings Co., Ltd.)
• Original Assignee: Mitsui Engineering & Shipbuilding Company Limited (Mitsui E&S Holdings Co., Ltd.)
• Inventors: Takahashi, Shinji, Arai, Takashi, Miyazaki, Takayuki, Takeda, Yasuhide, Fukui, Shigeo
• Application Number:
  US13/202,778
• Publication Number:
  US 20120037833A1
• Time in Patent Office: Days
• US Class Current: 251/366
• CPC Class Codes: B65G 53/4658 the element having passages simultaneously connectable to both inlet and outlet ports
• CPC Class Codes: B65G 65/4881 rotating about a substantially horizontal axis
• CPC Class Codes: F16K 5/0605 with particular plug arrangements, e.g. particular shape or built-in means

Abstract

A powder valve is propose which is simple in structure and small in size, which can prevent powder from getting stuck in the valve, and can withstand high feed pressure. The valve includes a valve casing 21, a valve shaft 25, and a valve body 22 mounted in the valve casing 21 and supported by the valve shaft 25. The valve body 22 has a spherical outer surface 27 configured to be brought into contact with a valve seat 23 of the valve casing 21 to close the valve. The valve body 22 is formed with a communication hole 26 extending in a direction perpendicular to the valve shaft 25 so that when the valve body 22 is rotated about the valve shaft 25 in either of two opposite directions from the closed position, the valve is configured to open through the communication hole 26. The communication hole 26 is open on the back side of the valve body 22 over the entire length thereof. With this arrangement, it is possible to ensure the advantages of a ball valve, i.e. full-bore properties and high rigidity. Since the pressure of powder flowing through the communication hole 26 acts on the inner periphery of the valve casing 21, the flow of powder blows off and removes any powder which could otherwise get stuck on the inner periphery of the valve casing 21. By rotating the valve body 22 in both directions, powder can be removed on both sides of the valve shaft 25.

Claims

1. A valve for powder comprising a valve casing 21, a valve shaft 25, a valve body 22 mounted in the valve casing 21 and rotatably supported by the valve shaft 25, said valve casing 21 having an inlet port 11, and an annular valve seat 23 provided at the inlet port 11 of the valve casing 21, wherein said valve body 22 has a spherical outer surface 27 configured to be brought into contact with the valve seat 23 over the entire circumference of the valve seat 23 when the valve body 22 is in a closed position, wherein said valve body 22 is formed with a communication hole 26 extending in a direction perpendicular to an axis p of the valve shaft 25, wherein when the valve body 22 is rotated about the valve shaft 25 in either of two opposite directions from the closed position, the valve is configured to open through the communication hole 26, and wherein the communication hole 26 is open at its portion opposite to its side facing the valve seat 23 in the closed position, over an entire length of the communication hole 26.

2. The valve for powder of claim 1 wherein the valve body 22 is hemispherical.