JP2010286094A - Steam valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a steam valve by which an automatic liquid discharge valve can be disassembled, and maintained and repaired even if opening and closing valves are mounted at an inlet side and an outlet side separately. <P>SOLUTION: An inlet 1 and an outlet 2 are formed in a valve casing 3. A valve body 8 is disposed between the inlet 1 and the outlet 2. A valve stem 9 is connected to the valve body 8. An outlet side valve port 6 and an automatic liquid discharge valve side valve port 7 are disposed at upper and lower parts of the valve body 8. The automatic liquid discharge valve 5 is connected to a lower part of the automatic liquid discharge valve side valve port 7. As shown in Fig.1, by closing the automatic liquid discharge valve side valve port 7 by the valve body 8, the automatic liquid discharge valve 5 can be disassembled, and maintained and repaired without an inflow of fluid from the inlet 1 and the outlet 2 into the automatic liquid discharge valve 5. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

 The present invention relates to a steam valve which is attached to a steam piping system and which can control the amount of steam passing or prevent the steam from flowing down.

A conventional steam valve has an inlet and an outlet formed in a valve casing, a valve port that connects the inlet and the outlet is disposed, a valve body that opens and closes the valve port, and a valve shaft that opens and closes the valve body is connected. A gas-liquid separator and an automatic drain valve are provided below the valve port. The steam and condensate are separated from the mixed fluid of steam and condensate condensed with steam, and separated. Only water is discharged from the automatic drain valve to the outside, and only the steam can flow down to the downstream side of the valve.

In the conventional steam valve described above, when the automatic drain valve is disassembled and maintained, there is a problem that maintenance cannot be performed unless the on-off valves separately attached to the inlet side and the outlet side of the steam valve are closed. It was. It is costly to separately attach on-off valves to the inlet side and the outlet side of the steam valve.

JP 62-67395 A

  The problem to be solved is to obtain a steam valve capable of disassembling and maintaining an automatic drain valve without separately installing on-off valves on the inlet side and the outlet side.

 The present invention provides a valve body that forms an inlet and an outlet in a valve casing, attaches a valve seat member that forms a valve port that communicates the inlet and outlet to the valve casing, and opens and closes the valve port by seating on and off the valve seat member. A valve seat member that forms a valve opening in which a valve shaft that opens and closes the valve body is connected, an automatic drain valve is provided below the valve opening, and an inlet is connected above the automatic drain valve Further, at least two valve ports, that is, an outlet side valve port and an automatic drain valve side valve port are formed.

  In the present invention, the automatic drain valve side valve port is formed in the valve seat member, and the automatic drain valve side valve port is closed by the valve body so that the fluid from both the inlet and outlet directions is automatically drained. There is an advantage that the automatic drain valve can be disassembled and maintained without flowing into the liquid valve.

It is a block diagram which shows the Example of the steam valve which concerns on this invention.

In the present invention, at least two valve ports, that is, an outlet side valve port and an automatic drain valve side valve port are formed on the valve seat member. It is desirable to arrange in the lower part.

  In FIG. 1, a steam valve includes a valve casing 3 having an inlet 1 and an outlet 2, a valve seat member 4 having an outlet side valve port 6 and an automatic drain valve side valve port 7, and an automatic drain valve 5. Configure.

The inlet 1 and the outlet 2 are arranged on the same axis, and the outlet side valve port 6 and the automatic drain valve side valve port 7 are arranged at positions orthogonal to the inlet 1 and the outlet 2. Each of the valve ports 6 and 7 is circular and is opened and closed by a valve body 8 disposed at an opposing position. The outlet side valve port 6 communicates the inlet 1 and the outlet 2, while the automatic drain valve side valve port 7 communicates the inlet 1 and the automatic drain valve 5, and the outlet 2 and the automatic drain valve 5. .

A valve shaft 9 that can open and close the valve body 8 from outside is connected. Although not shown, the valve shaft 9 can be attached with a handle for manual rotation by a human or can be rotated by an electric motor.

The automatic drain valve 5 has a built-in steam trap and can discharge only condensate from the mixed fluid of steam and condensate flowing in from the inlet 1 to the outside from the condensate outlet 10. Is.

The state shown in FIG. 1 is a state in which the automatic drain valve side valve port 7 is closed by the valve body 8. The automatic drain valve 5 can be disassembled and maintained in this state without flowing in.

By slightly raising the valve body 8 and positioning it between the automatic drain valve side valve port 7 and the outlet side valve port 6, the steam flows down from the inlet 1 to the outlet 2, and the recovery from the automatic drain valve 5. Water can be automatically discharged outside.

 By adjusting the position of the valve body 8 up and down, the amount of steam flowing down from the inlet 1 to the outlet 2 can be increased and decreased.

  By positioning the valve body 8 on the upper end, that is, on the outlet side valve port 6, the flow of steam from the inlet 1 to the outlet 2 can be closed.

  It can be applied as a steam valve that supplies steam to various devices that use steam.

1 Inlet 2 Outlet 3 Valve casing 5 Automatic drain valve 6 Outlet side valve port 7 Automatic drain valve side valve port 8 Valve element 9 Valve shaft

Claims (1)

  A valve seat that forms an inlet and an outlet with a valve casing, a valve port that communicates the inlet and outlet, is attached to the valve casing, and a valve body that opens and closes the valve seat by opening and closing the valve seat member is disposed. A valve shaft that opens and closes the body is connected, an automatic drain valve is provided below the valve opening, and an inlet is connected above the automatic drain valve. A steam valve characterized by forming at least two valve ports, a valve port and an automatic drain valve side valve port.