JP2004316737A - Wafer type orifice trap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wafer type orifice trap capable of sealing between a pair of flanges of pipes by a single gasket. <P>SOLUTION: This wafer type orifice trap comprises: a gasket main body 10 sandwiched and fixed between a pair of the flanges 6, 7 of the pipes 4, 5 by a bolt 8 and a nut 9 as outer connection members; an orifice plate 2 including a plurality of orifices 12a, 12b, 12c, 12d, 12e, 12f with different opening areas, and being air-tightly disposed in inner periphery of the gasket main body 10; and a partitioning member 13 having a communication hole 15, and being attached to the orifice plate 2 by opposing the communication hole15 to a desired orifice 12a of the orifice plate 2. The orifice plate having the plurality of orifices with the different opening areas are air-tightly disposed on the inner periphery of the gasket body for sealing a section between the pair of flanges 6, 7 of the pipes. The partitioning member having the communication hole is mounted on the orifice plate so as to make the communication hole face the desired orifice of the orifice plate, thus sealing the section between the pair of flanges of the pipes with a single gasket body. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an orifice strap that automatically discharges condensate generated in a steam piping system such as a steam transport pipe or a steam-using device from an orifice that is always open, and is particularly fixed between a pair of flanges of the pipe. The present invention relates to a wafer-type orifice strap having a structure to be used.
[0002]
[Prior art]
[Patent Document 1]
A conventional wafer-type orifice strap is disclosed in Japanese Utility Model Publication No. 61-14717. As understood from the publication, an orifice plate having an orifice is fixed between a pair of flanges of a pipe by an external connecting member via a pair of gaskets.
[0003]
[Problems to be solved by the invention]
In the above-mentioned conventional one, there is a problem that a pair of gaskets for sealing between a pair of flanges of the pipe is required. Therefore, a technical problem of the present invention is to provide a wafer-type orifice strap that can seal between a pair of flanges of piping with a single gasket.
[0004]
[Means for Solving the Problems]
The technical means of the present invention taken to solve the above technical problem includes an annular gasket body fixed between a pair of pipe flanges by an external connecting member, and a plurality of orifices having different opening areas. An orifice plate airtightly arranged on the inner periphery of the gasket main body, and a partition member having a communication hole and attached to the orifice plate with the communication hole facing a desired orifice of the orifice plate. The characteristic feature is the wafer type orifice strap.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
The wafer-type orifice strap of the present invention, an orifice plate having a plurality of orifices having different opening areas is hermetically arranged on the inner periphery of a gasket body for sealing between a pair of flanges of a pipe, and a partition member having a communication hole. Since the communication hole faces the desired orifice of the orifice plate and is attached to the orifice plate, a single gasket body can seal between a pair of flanges of the pipe.
[0006]
【Example】
An embodiment showing a specific example of the above technical means will be described (see FIGS. 1 to 4). The orifice plate 2 of the wafer-type orifice strap 1 of the present invention is formed in a spiral-wound gasket 3. The spiral gasket 3 is disposed between the flanges 6, 7 of the pipes 4, 5, and is sandwiched by connecting means including a bolt 8 and a nut 9.
[0007]
The spiral-wound gasket 3 includes a gasket main body 10 formed by overlapping a hoop material and a filler material and winding in a spiral shape; an outer ring 11 air-tightly arranged on the outer periphery of the gasket main body 10; And an orifice plate 2 airtightly arranged. Stainless steel is mainly used for the hoop material of the gasket main body 10, asbestos, graphite, PTFE, inorganic paper and the like are used for the filler material, and carbon steel and stainless steel are generally used for the outer ring 11 and the orifice plate 2.
[0008]
The orifice plate 2 has six orifices 12a, 12b, 12c, 12d, 12e, and 12f having different opening areas on the circumference. A disk-shaped partition member 13 is attached to the right side surface of the orifice plate 2 with a set screw 14. The opening areas of the six orifices are formed larger in the order of 12a, 12b, 12c, 12d, 12e, and 12f. The partition member 13 has a communication hole 15 having an opening area slightly larger than the orifice 12f having the maximum opening area. FIG. 1 shows a state in which the partition member 13 closes the orifices 12b, 12c, 12d, 12e, and 12f and opens the orifice 12a through the communication hole 15. By rotating the partition member 13 in the clockwise direction by 60 degrees from the illustrated state and attaching it to the orifice plate 2, the orifices 12b, 12d, 12f, 12e, and 12c can be opened in this order. Condensate flowing in from the upstream pipe 4 flows down from the orifice 12a to the downstream pipe 5 side.
[0009]
【The invention's effect】
The present invention has the following specific effects.
According to the present invention as described above, an orifice plate having a plurality of orifices having different opening areas is hermetically arranged on the inner periphery of a gasket main body that seals between a pair of flanges of a pipe, and a partition member having a communication hole is provided. By attaching the communication hole to the desired orifice of the orifice plate and attaching it to the orifice plate, an excellent effect that a single gasket body can seal between a pair of flanges of the pipe is produced.
[Brief description of the drawings]
FIG. 1 is a view showing a wafer-type orifice strap of the present invention fixed between a pair of flanges of piping. FIG. 2 is an enlarged view of the wafer-type orifice strap of FIG. 1. FIG. 3 is an orifice plate of FIG. Left side view of FIG. 4 Right side view of partition member in FIG. 2 [Description of reference numerals]
DESCRIPTION OF SYMBOLS 1 Wafer type orifice strap 2 Orifice plate 3 Spiral wound gasket 4, 5 Piping 6, 7 Flange 8 Bolt 9 Nut 10 Gasket main body 11 Outer rings 12a, 12b, 12c, 12d, 12e, 12f Orifice 13 Partition member 14 Set screw 15 Communication Hole

Claims (1)

An annular gasket body fixed between the pair of flanges of the pipe by an external connecting member, an orifice plate having a plurality of orifices having different opening areas and airtightly arranged on the inner periphery of the gasket body, and a communication hole. And a partition member attached to the orifice plate with the communication hole facing the desired orifice of the orifice plate.

Images