JP2011241849A - Lever float type drain trap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lever float type drain trap that facilitates maintenance of a valve seat and a valve.SOLUTION: A casing is constituted of a lid 4 where an inlet 1 of drain is arranged and a body 3. A hollow float 17 is vertically movably arranged inside of the body 3. The float 17 is connected to a rotating support part 8 by the lever 7. A connection rod 9 connecting the lever 7 and an on-off valve member 5 is attached to the lateral side of the rotating support part 8. The float 17 moves up and down, thereby the connecting rod 9 rotates, the torque is transmitted to the on-off valve member 5, and the on-off valve member 5 can be opened and closed. The maintenance of the valve and the valve seat can be executed without disassembling the body 3 and the lid 4 and by disassembling only the on-off valve member 5 when executing the maintenance of the valve and the valve seat incorporated in the on-off valve member 5.

Description

  The present invention relates to a lever float drain trap that automatically discharges drain generated in a steam piping system, compressed air piping system, and gas piping system to the outside using a float.

  A conventional lever float drain trap is formed in a casing, which forms an inlet, a valve chamber, and an outlet. A valve seat that opens a valve port that communicates the valve chamber and the outlet is formed in the lower portion of the valve chamber, and is supported in the valve chamber. A lever that rotates around the swing shaft is connected to a float that rises and falls according to the liquid level in the valve chamber, and a valve element that opens and closes the valve seat and opens and closes the valve port is connected to the lever. The first and second valve seats provided on one axis form a valve seat, and the first and second valve seats are simultaneously opened and closed by moving on the first and second valve seat axes. A valve body is formed by the first and second valve bodies, and the fluid pressure acting on the valve body is made to act symmetrically to cancel each other so that a large valve port can be opened and closed.

JP 2008-286238 A

  In the conventional lever float type drain trap, when the valve seat and the valve body are maintained, the maintenance cannot be performed unless the cover body is removed from the main body. Due to the large size, it is difficult to remove the valve, and therefore it is difficult to maintain the valve seat and the valve body.

  The problem to be solved by the present invention is to provide a lever float type drain trap that can easily perform maintenance of a valve seat and a valve body.

  In order to solve the above problems, the lever float type drain trap of the present invention has a drain inlet connected to the casing, and a float that rises and falls according to the liquid level of the drain is provided in the casing via a lever. In the case of discharging the drain that has flowed into the casing to the outside, a float valve is provided outside the casing as an on-off valve member, and the on-off valve member and the lever are joined to float the float. By transmitting the lever displacement accompanying the lowering to the on-off valve member and opening or closing the on-off valve member, the drain in the casing is not discharged to the outside, or the gas in the casing is not discharged to the outside. It is characterized by.

  According to the present invention, by providing a butterfly valve as an on-off valve member outside the casing, the valve seat can be disassembled by disassembling only the on-off valve member without disassembling the casing, that is, the main body and the lid. And the valve body can be easily maintained.

It is a partial section lineblock diagram of the lever float type drain trap concerning an embodiment of the invention.

  Hereinafter, an embodiment of the present invention will be described with reference to FIG. The lever float type drain trap includes a lid body 4 provided with an inlet 1, a main body 3 having a hollow float 17 disposed therein, and an on-off valve member 5 having an outlet 2 and provided outside the main body 3.

  The inlet 1 provided on the lid 4 is connected to a drain generation source (not shown), and allows the drain and mixed fluid such as vapor or compressed air to flow into the main body 3. The lid 4 and the main body 3 constitute a casing, and a hollow float 17 is arranged inside the main body 3 so as to be movable up and down. FIG. 1 shows a state in which the lever float type drain trap according to the present embodiment is viewed from above, and the float 17 can move up and down from the back side to the front side in FIG. The left end of the lever 7 is connected to the center portion of the float 17, and the right end of the lever 7 is connected to the rotation support portion 8 that moves up and down. A joining rod 9 for joining the lever 7 and the opening / closing valve member 5 is attached to the side of the rotation support portion 8. When the float 17 moves up and down, the connecting rod 9 rotates, and the rotational force can be transmitted to the on-off valve member 5 to open and close the on-off valve member 5.

  One end of the conduit 10 is connected to the bottom of the main body 3, and the other end is connected to the inlet 11 of the on-off valve member 5. In the present embodiment, although the internal structure of the on-off valve member 5 is not shown, what can be opened and closed by the rotational force of the connecting rod 9 is suitable, and a so-called butterfly valve is suitable.

  As the mixed fluid of drain and gas flows into the main body 3 from the inlet 1 and the water level rises, the float 17 also rises and rotates the joining rod 9. When the float 17 rises to a predetermined position, the on-off valve member 5 is opened, and the drain in the main body 3 is discharged to the outside from the conduit 10 and the outlet 2 of the on-off valve member 5.

  As the drain in the main body 3 is discharged, the float 17 descends and rotates the connecting rod 9 in the opposite direction. When the float 17 descends to a predetermined position, the on-off valve member 5 closes and the main body 3 is closed. 3 prevents gas such as steam and compressed air from being discharged to the outside.

  When maintaining the valve body and the valve seat built in the on-off valve member 5, it is possible to easily maintain the valve body and the valve seat by disassembling only the on-off valve member 5 without disassembling the main body 3 and the lid body 4. Can be implemented.

  INDUSTRIAL APPLICABILITY The present invention can be used for a lever float drain trap that automatically discharges drain generated in a steam piping system, compressed air piping system, or gas piping system using a float.

1 Inlet 2 Outlet 3 Body 4 Lid 7 Lever 8 Rotation Support 9 Joint Rod 10 Pipe Line 17 Float

Claims (1)

  A drain inlet is connected to the casing, and a float that rises and falls according to the drain liquid level is connected to the casing through a lever so that the drain flowing into the casing is discharged to the outside. By connecting an external butterfly valve as an on-off valve member and joining the on-off valve member to the lever, the displacement of the lever associated with the float rise and fall is transmitted to the on-off valve member, and the on-off valve member is A lever float drain trap characterized in that the drain in the casing is discharged to the outside by opening or closing the valve, or the gas in the casing is not discharged to the outside.

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