JP2010031921A - Operation state detection device of valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an operation state detection device of a valve, in which a sensor can be mounted on the valve even where space is narrow in one direction from the installation site of the valve. <P>SOLUTION: The operation state detection device of the valve includes an inlet connection flange 5 connected to a connection flange A of a drain discharge pipe by connection members B1, B2, B3, B4 of a bolt and a nut, a sensor mounting member 11 disposed between the inlet connection flange 5 and a fastening member, and the sensor 12 for operation state detection mounted on the sensor mounting member 11. The sensor mounting member 11 is disposed between the inlet connection flange 5 and the fastening members B1, B2, or the inlet connection flange 5 and the fastening members B3, B4, or the inlet connection flange 5 and the fastening members B2, B4, or between the inlet connection flange 5 and the fastening members B1, B3 so that the sensor 12 for operation state detection mounted on the sensor mounting member 11 is directed in a desired direction such as upper, lower, right or left direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a device for detecting an operating state of valves represented by various applications such as valves and steam traps.

  Various types of conventional operation state detection devices for valves have been proposed. For example, in the case of an operation state detection device for a steam trap, there is one disclosed in Japanese Patent Laid-Open No. 10-227686. In this case, a sensor unit for detecting an operating state is attached to the casing using a connection structure between a trap body and a trap lid constituting the casing of the steam trap. That is, a sensor unit is constituted by a vibration sensor having a bolt part at the tip and a temperature sensor attached to the head of the bolt part of the vibration sensor, and the bolt part of the vibration sensor is connected to the trap body and the trap lid. Instead, the sensor unit is attached to the casing by screwing it into the bolt hole of the connecting bolt, and in this attached state, the vibration and temperature of the casing indicating the operation state of the steam trap are detected by the vibration sensor and the temperature sensor. Yes.

In the above-described prior art steam trap operating state detection device, the sensor unit is attached in only one direction upward from the upper part of the steam trap. If it is narrow, there is a problem that the sensor unit cannot be attached to the steam trap.
JP-A-10-227686

  Therefore, the technical problem of the present invention is to provide an operating state detection device for valves that can attach a sensor to the valves even when the space in one direction from the valves at the place where the valves are installed is narrow. .

  The technical means of the present invention devised to solve the above technical problem includes an inlet connection flange connected by a bolt / nut connection member to a connection flange of a drain discharge pipe, and interposed between the flange and the fastening member. And a sensor for detecting an operation state attached to the sensor attachment member. The sensor for detecting the operation state attached to the sensor attachment member is in an upward direction, a downward direction, a right direction, a left direction, or the like. Detecting the operating state of valves, characterized in that a sensor mounting member is interposed between the flange and the fastening member so that the sensor is oriented in a desired direction, and the inlet connecting flange is connected to the connecting flange of the drain discharge pipe by the connecting member. In the device.

  The operation state detecting device for valves according to the present invention is configured so that the sensor for detecting the operation state attached to the sensor attachment member is directed in a desired direction such as an upward direction, a downward direction, a right direction, or a left direction. Since the inlet connection flange is connected to the connection flange of the drain discharge pipe by a connecting member interposed between the flange and the fastening member, even if the space in one direction from the valves at the place where the valves are installed is narrow By interposing the sensor attachment member between the flange and the fastening member so that the sensor for detecting the operation state is directed in the other direction, an excellent effect that the sensor can be attached to the valves is produced.

  In the present invention, the sensor mounting member is interposed between the flange and the fastening member so that the sensor for detecting the operation state attached to the sensor mounting member is directed in a desired direction such as upward, downward, rightward, or leftward. Then, the inlet connection flange is connected to the connection flange of the drain discharge pipe by the connecting member. Therefore, for example, when the space upward from the valves at the place where the valves are installed is narrow, the sensor for detecting the operating state is directed in a direction other than the upward direction such as the downward direction, the right direction, or the left direction. The sensor can be attached to the valves by interposing the attachment member between the flange and the fastening member.

  An embodiment showing a specific example of the above technical means will be described (see FIGS. 1 and 2). FIG. 1 is a cross-sectional view of a float steam trap according to an embodiment of the present invention, and FIG. 2 is a left side view of FIG. The casing of the steam trap is composed of a trap body 1 and a trap lid 3 connected to the trap body 1 with bolts 2 and forms a valve chamber 4 therein. The trap body 1 has an inlet connection flange 5 connected to the connection flange A of the drain discharge pipe from the steam using device, and an outlet connection flange 6 connected to the drain discharge pipe to the discharge point. 5a is formed, and a trap outlet 6a for discharging the drain W is formed in the outlet connection flange 6. The valve chamber 4 always communicates with the trap inlet 5 a and also communicates with the trap outlet 6 a through the valve port 7 provided in the trap lid 3.

  The valve chamber 4 is internally provided with a spherical float 8 that opens and closes the valve port 7 by the vertical movement accompanying the fluctuation of the water level of the drain W, and in the normal use state in which the drain W flows together with the steam S from the trap inlet 5a. In the state where 7 is submerged in the drain W, the degree of opening is adjusted by the float 8 according to the amount of inflow of the drain, so that only the drain W passes through the valve port 7 to the trap outlet 6a in a state where leakage of the steam S is prevented. Continuously discharged. Further, when the drain W does not flow from the trap inlet 5a, the valve port 7 is blocked by the float 8 in a state where the drain port W is submerged in the lowered water level, and the steam S leaks due to the blockage of the valve port 7 under the submerged water. Is definitely prevented.

  In the upper part of the valve chamber 4, a filter 9 is attached to the ceiling wall of the trap body 1 for catching foreign matter that causes the opening / closing operation failure of the valve port 7, and the drain W and the steam S pass through the filter 9 through the trap inlet 5 a. Into the valve chamber 4. A bimetal 10 for discharging low-temperature air or low-temperature water is attached to the bottom wall of the trap lid 3 at the bottom of the valve chamber 4. When the steam S or the high-temperature drain W flows into the valve chamber 4 and the valve chamber 4 is at a high temperature, the bimetal 10 is in a contracted and bent state where the tip is not in contact with the float 8 in the seated state, and the valve port 7 formed by the float 8. Occlusion. On the other hand, when low-temperature air or low-temperature water flows into the valve chamber 4 and the valve chamber 4 is at a low temperature, the float 8 is pushed up to push up the seated float 8 at the tip, and the float 8 is forcibly pushed up to open the valve port 7. As a result, low-temperature air or low-temperature water is discharged through the valve port 7 to the trap outlet 6a.

  The inlet connection flange 5 is connected to the connection flange A of the drain discharge pipe by connecting members B1, B2, B3, B4 of bolts and nuts. At this time, the sensor mounting member 11 is interposed between the inlet connecting flange 5 and the heads or nuts of the bolts of the connecting members B1 and B2. The sensor attachment member 11 can be interposed between the connection flange A of the drain discharge pipe and the heads or nuts of the bolts of the connection members B1 and B2. The sensor attachment member 11 can be interposed between the flanges by one connecting member, but can be prevented from rotating by being interposed between the flanges by two or more connecting members. When viewed from the side, the sensor mounting member 11 has an approximately inverted Y shape, the upper end is bent by approximately 90 degrees, and has an approximately L-shaped cross section. The hole has a smaller diameter than the outer diameter. A sensor 12 for detecting an operating state is attached to the sensor attachment member 11. The sensor 12 includes a vibration sensor 12a and a temperature sensor 12b attached to the tip of the vibration sensor 12a. The sensor 12 can be composed of only the vibration sensor 12a, can be composed of only the temperature sensor 12b, or can be composed of the vibration sensor 12a and the temperature sensor 12b. By detecting the vibration and temperature of the trap body 1 indicating the operating state of the steam trap by the vibration sensor 12a and the temperature sensor 12b, and sending the detection signal as an output signal to the determination device by the cable 13 (or wireless transmission means) The operation state of the steam trap is determined in the determination device. The sensor 12 is a location where steam is present when the steam trap is operating normally, and is a location where drain is present when the steam trap is causing drain discharge clogging. Alternatively, by detecting the vibration or temperature of the inlet connecting flange 5 or the inlet pipe portion between the inlet connecting flange 5 and the valve chamber 4, the steam trap is operating normally by the detection signal from the temperature sensor 12b or the drain is clogged. Can be accurately determined.

  FIGS. 1 and 2 show that the sensor mounting member 11 is interposed between the inlet connection flange 5 and the fastening members B1 and B2 in a state where the sensor 12 is directed upward as indicated by a solid line. When the space upward from the steam trap at the installation location is narrow, the sensor mounting member 11 is connected to the flange and the fastening member B3 so that the sensor 12 is directed downward, rightward, or leftward as indicated by a dotted line. It is interposed between B4 or between the flange and the fastening members B2 and B4 or between the flange and the fastening members B1 and B3.

Sectional drawing of the float type steam trap which is an Example of this invention. The left view of the float type steam trap of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Trap body 2 Bolt 3 Trap cover body 4 Valve chamber 5 Inlet connection flange 5a Trap inlet 6 Outlet connection flange 6a Trap outlet 7 Valve port 8 Float 9 Filter 10 Bimetal 11 Sensor mounting member 12 Sensor 12a Vibration sensor 12b Temperature sensor 13 Cable A Connection flange B1, B2, B3, B4 connecting member of drain discharge pipe

Claims (1)

An inlet connection flange connected to the connection flange of the drain discharge pipe by a bolt / nut connection member, a sensor attachment member interposed between the flange and the fastening member, and a sensor for detecting an operating state attached to the sensor attachment member The sensor mounting member is interposed between the flange and the fastening member so that the sensor for detecting the operation state attached to the sensor mounting member is directed in a desired direction such as upward, downward, rightward, or leftward. An operating state detecting device for valves, wherein an inlet connecting flange is connected to a connecting flange of a drain discharge pipe by a connecting member.

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