JP2835669B2 - Steam trap operation determination device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam trap operation judging device for measuring the operating state of a steam trap, that is, whether or not the steam trap is operating normally. To judge.

[0002] A steam trap is attached to a lower portion of a steam pipe or a steam-using device, and automatically removes only condensed water generated as a result of heat exchange of steam to the outside. Leakage is a kind of automatic valve to prevent. Therefore, when the steam trap fails, a large amount of steam having high thermal energy leaks to cause energy loss, or conversely, when the steam trap becomes closed, condensate generated in the steam-using device is eliminated. The steam trap may be damaged, and the quality of the heated object may be impaired, and it is necessary to grasp the operating condition of the steam trap attached to a particularly important place. there were.

[0003]

2. Description of the Related Art A conventional steam trap operation determining apparatus is disclosed, for example, in Japanese Patent Application Laid-Open No. Hei 1-210699. This is because an operating state detector that detects the vibration and temperature of the steam trap, a storage device that stores the conditions required for measurement, and a reading device are arranged. After reading the measurement conditions from the storage device, the operating state is detected. The operation of the steam trap used under various conditions is reliably determined by detecting the vibration and temperature by bringing the vessel into contact with the steam trap.

[0004]

In the above conventional apparatus, the detector must be brought into contact with the surface of the steam trap in order to detect vibration and temperature, and the location where the steam trap is actually installed is required. Need to move up to
There was a problem that required much labor and time. Steel
In many cases, the mud trap is attached to an underground part of a pit or the like, or is attached to the bottom of a steam pipe at a high place or the like, and it takes labor and time to move to the attached part. Further, in the above-described conventional device, since the operation is determined by contacting the detector, the contact portion of the detector is worn with the measurement time, and there has been a problem that the operation state cannot be reliably detected for a long period of time. For the purpose of detecting vibration, a metal or the like with low vibration attenuation is used as the detection end.For temperature detection, an ultra-thin thermocouple with low heat capacity is used. It will be lost. Further, in the above-described conventional device, a storage device for storing conditions necessary for measurement and a reading device for reading the conditions from now on are required, and there is a problem that the operation determination device becomes expensive. .

[0005] Therefore, the technical problem of the present invention is that the operating state can be reliably detected for a long period of time, and the operation state can be improved.
An object of the present invention is to make it possible to determine the operation of the steam trap without contacting the steam trap and using an inexpensive device.

[0006]

Technical means of the present invention taken in order to solve the above technical problems SUMMARY OF THE INVENTION, in which it is possible to detect the surface temperature state of the entire steam trap by the radiation temperature sensor, release An image converter for displaying the signal from the irradiation temperature sensor on a display,
Is made of a determining operation determination unit the quality of the operation of at least <br/> Model and steam trap from the surface temperature condition of the steam trap from the image of the image converter.

[0007]

The operation of the above technical means is as follows.
As described above, the steam trap is an automatic valve that eliminates only the condensate without leaking steam.The condensate and steam stay inside the steam trap. It is in a high temperature state. The surface temperature condition of the entire hot steam trap is detected without contact with a radiation temperature sensor, by displaying images with the image converter, the overall shape of the steam trap is detected, it is possible to detect at least types formula . That is, the shape and size of the steam trap vary depending on the type such as the disk type, the float type, and the bimetal type, and the condensed water and the internal retention state of the steam also change. For example,
The disc-type steam trap opens the valve after condensing the condensate at a temperature of 6 to 7 degrees C below the steam temperature on the primary side, and then opens the valve. The float-type steam trap condenses water at a temperature almost equal to the steam temperature. Is continuously discharged, the state of condensed water changes depending on the type of trap.

[0008] By detecting the type and simultaneously detecting the condensed water and steam retention status, the condensed water and steam retention status for each normal steam trap model stored in advance in the operation determiner are determined. By performing the comparison, the quality of the operation of the steam trap can be determined.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment showing a specific example of the present invention will be described (see FIGS. 1 to 3). FIG. 1 is a diagram showing an overall configuration of an operation determination device 2 of a steam trap 1. The steam trap 1 is attached to the lower outlet side of the steam use device 5 connected to the steam supply pipe 3 via the valve 4. Condensate generated in the steam-using device 5 flows into the steam trap 1 with a portion of the mixed steam. If steam trap 1 is normal,
Only the condensate is discharged from the outlet pipe 6, and the steam-using device 5
The side steam does not leak.

A radiation temperature sensor 10 is arranged on the side of the steam trap 1. Radiation temperature sensor-10
An infrared detector that detects infrared rays emitted from the surface of the memory trap 1 according to the temperature and converts the infrared rays into electric signals is built in. The electric signal corresponding to the temperature is amplified or corrected by the sensor main body unit 11, and is connected to the image converter 13 via the connection line 12.
Sent to The image converter 13 compares a display 15 for displaying an image corresponding to the temperature with a detected image state by storing the surface temperature state of a normal steam trap (not shown). And an operation judging device for judging whether the operation is good or not. The image converter 13
Is provided with a keyboard 16 for inputting measurement conditions such as a steam pressure and a trap number.

FIGS. 2 and 3 are sectional views of a general steam trap. FIG. 2 shows a disk type steam trap 18.
The inlet pipe 20 and the outlet pipe 6 communicating with the steam using device are connected. An inlet passage 21 that communicates with the inlet pipe 20 and an outlet passage 22 that communicates with the outlet pipe 6 are formed through a variable pressure chamber 23. A flat portion at the end of the inlet passage 21 and the outlet passage 22 in the variable pressure chamber 23 is defined as a valve seat surface 25, and the disc valve 24 is disposed in a free state on the upper surface thereof.

The condensed water stays in the inlet passage 21 and the transformer chamber 23
The steam stored in the transformer chamber is condensed by heat radiation and
When the pressure in the inside decreases, the force of pushing up the disc valve 24 by the pressure in the inlet passage 21 becomes larger than the force of pushing down the disc valve 24 by the pressure in the variable pressure chamber 23, and the disc valve 24 The condensed water is discharged from the outlet passage 22 and the outlet pipe 6 after being separated from the seat surface 25. Entrance passage 2
1 and the condensate in the inlet pipe 20 are discharged and the steam is
As soon as it flows into 3, the inside of the variable pressure chamber 23 is filled with steam and becomes high pressure, and the flow velocity of the fluid flowing between the lower surface of the disk valve 24 and the valve seat surface 25 becomes high because of the steam. When the static pressure drops, the disc valve 24 closes.
The disc-type steam trap 18 discharges condensed water by repeating the above-mentioned on-off valve. In a normal condition, condensed water having a temperature lower than the steam temperature is retained in the inlet passage 21 or the inlet pipe 20 and is discharged for a predetermined time. The open / close valve is repeated every time interval. In the case where the temperature is not normal, for example, when the disc valve 24 remains open without closing, the steam is continuously discharged, and the temperature from the inlet pipe 20 to the outlet pipe 6 is substantially equal to the steam temperature. Become.

FIG. 3 shows a float type steam trap 19, in which an inlet pipe 20 and an outlet pipe 6 are connected as in FIG. 2, and a spherical float 31 is arranged in a valve chamber 30 in a free state. . A valve seat member 33 penetrating the valve hole 32 is disposed between the valve chamber 30 and the outlet passage 22. Float 3 in valve chamber 30
1 floats in accordance with the amount of condensed water flowing into the valve chamber 30, and separates from the end of the valve hole 32 on the valve chamber 30 side to discharge the condensed water. When the condensate in the valve chamber 30 is discharged, the float 31 also descends to close the valve hole 32 on the outer surface thereof, thereby preventing leakage of steam. If the float type steam trap 19 is operating normally, the inlet piping 2
Although the temperature drop from 0 to the outlet pipe 6 is extremely small, for example, when the float 31 is submerged due to a failure,
The valve hole 32 is closed, and condensate does not flow down to the outlet pipe 6 side, so that the temperature state is low.

When judging the operation of the steam trap,
The shape and size of the steam trap to be measured can be detected by the radiation temperature sensor 10, and it is determined from the shape whether the steam trap is a disk steam trap or a float steam trap. By comparing the temperature of the trap with a normal temperature state by the operation determiner, it is possible to determine whether or not the steam is leaking or is in a closed state, resulting in a malfunction.

In this embodiment, an example has been described in which the operation of only the steam trap is determined. However, the operation of, for example, a steam valve for controlling the flow of steam can also be determined from temperature information. Further, in this embodiment, an example in which only the temperature information of the steam trap is detected by the radiation temperature sensor 10 has been described. However, the pipes, the steam-using device 5, the valve 4, and the like which communicate with the steam trap are shown. Can also detect the temperature state at the same time.

[0016]

The present invention has the following specific effects. As described above, according to the present invention, the operation can be determined without contact with the steam trap by the radiation temperature sensor, the wear of the detection end is eliminated, and the operation can be reliably determined for a long time. Besides, by detecting the radiant temperature, it is not necessary to move to a high place or a basement where the steam trap is installed, and to perform the measurement, thereby saving labor and time. Further, a storage device and a reading device for the measurement conditions are not required, and the device can be inexpensive.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of a steam trap operation determining apparatus according to the present invention.

FIG. 2 is a sectional view of a disk type steam trap.

FIG. 3 is a sectional view of a float type steam trap.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steam trap 2 Operation judging device 5 Steam use device 10 Radiation temperature sensor 13 Image converter 15 Display 18 Disc type steam trap 19 Float type steam trap

Claims (1)

(57) [Claims] 1. A contact to what it is possible to detect the surface temperature state of the entire steam trap by the radiation temperature sensor
There are an image converter for displaying image signals from the release morphism temperature sensor on the display, operation determination determines the quality of the operation of the steam trap at least the mold type and the surface temperature condition of the steam trap from the image of the image converter And a steam trap operation determining device.