JPH0425630Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention detects vibrations and temperature changes caused by the operation of steam traps and other valves using vibration sensors and temperature sensors, and is used to check whether the valves are working properly or not. This invention relates to improving the heat conduction characteristics of a temperature sensor of a leakage measurement device.

BACKGROUND ART Conventionally, as a steam leak detection device, there is one proposed in Japanese Patent Application No. 61-57499, for example. this is,
It detects vibrations that occur when steam leaks, and at the same time inputs the temperature detected by a temperature sensor into a calculation device.
By converting the measured temperature into a saturated pressure, the true steam leakage amount corresponding to each pressure in the steam system is calculated and displayed from the relationship between the vibration level and the leakage amount using the pressure as a parameter. Generally, the location where the amount of steam leakage from a valve such as a steam trap is measured is the outlet side passage, that is, the surface of the cylindrical part for connecting piping.

Problems to be Solved by the Present Invention The above device detects vibrations and temperature from an object to be detected, and displays the amount of steam leakage corresponding to each pressure. However, this method has a problem in that the amount of steam leakage cannot be measured accurately and quickly. In other words, since the tip of the temperature sensor is flat and the measurement point of the object to be detected is generally the surface of the cylindrical part, the necessary contact area between the two cannot be obtained and sufficient heat transfer does not occur. This is because an error occurs in the temperature, that is, the saturation pressure to be converted, and the measurement time becomes longer.

The technical problem of the present invention is to enable the amount of steam leakage to be measured accurately and quickly.

Means for Solving the Problems The technical means of the present invention taken to solve the above problems is to use a detector containing a vibration sensor and a temperature sensor, and to process electrical signals from the sensors as input. , a steam leakage measuring device consisting of a calculation device for determining whether the operation of the detected object is good or not, in which a plate-like semicircular spring is provided at the tip of the temperature sensor integrally with the temperature sensor. .

Action When the tip of the detector is pressed against an object to be detected, such as a steam trap or valve casing, the vibration and temperature of the object will be transmitted to the detector. A plate-shaped semicircular spring is installed at the tip of the temperature sensor. The entire surface of the object is connected to the object to be detected. The heat held by the object to be detected is transmitted to the temperature sensor through the entire surface of the plate-shaped semicircular spring.

Therefore, heat transfer from the object to be detected to the temperature sensor is carried out sufficiently and in a short time to the extent that no error occurs in the measured value, so that the amount of steam leakage can be measured accurately and quickly.

Effect of invention The present invention produces the following specific effects.

Since a plate-shaped semicircular spring is installed at the tip of the temperature sensor, sufficient heat transfer from the object to be detected to the temperature sensor can be ensured in a short period of time, and there is no error in the measured temperature, that is, the saturation pressure to be converted. The amount of steam leakage can be measured more accurately than the conventional method, and it is easier to judge whether the object to be detected is good or bad.

In addition, since it is a plate-shaped semicircular spring, even if the radius of curvature of the cylindrical part of the measurement point becomes large, it will deform according to the radius of curvature of each.
A single detector can measure various objects.

EXAMPLE An example showing a specific example of the present invention will be described. (See FIGS. 1 and 2) The overall configuration of the device consists of a detector 1, an arithmetic device 50, and a cable 51 connecting the two. Detector 1
is the detection needle 2, the detection needle holding member 4, and the front cover 6 that connects the detection needle holding member 4 and the main body 5.
and a rear cap 7 having a cable outlet 25.

A diaphragm mounting member 11 is provided in the approximately cylindrical internal space formed by the front cover 6 and the main body 5.
a spring holder 19 that connects the holding plate 15 and a micro holder 18 that holds the vibration sensor (ultrasonic microphone) 16 via an O-ring 17, and a printed circuit board having a detection signal amplification circuit. 20.

The detection needle holding member 4 has a conical upper half and a cylindrical lower half. A penetrating vertical hole 9 is made in the center, and the detection needle 2 is placed inside. The detection needle 2 slides within the detection needle holding member 4 until the tip of the detection needle holding member 4 comes into contact with the surface of the object to be detected.

The detection needle 2 has a substantially cylindrical shape, and is formed by arranging the temperature sensor 10 at one end and press-fitting the other end into the diaphragm mounting member 11. A plate-like semicircular spring 3 is integrally formed at the tip of the temperature sensor 10 by brazing or the like.

The conductor 26 from the temperature sensor 10 is connected to the detection needle 2
The wire is connected to the inside of the printed circuit board 20 through the conducting wire hole 12 provided halfway in the center of the probe, the vertical hole 9 of the detection needle holding member 4, and the communication hole 14 that communicates the holding plate 15, spring holder 19, and microphone holder 18. .

The diaphragm 21 is screwed onto one end of the diaphragm mounting member 11. Vibration sensor 16 facing diaphragm 21
Place. The pins of the vibration sensor 16 are connected into the printed circuit board 20. Spring holder 19
has a cylindrical space inside, and a coil spring 22 is disposed therein to maintain a constant pressing force of the detection needle 2 against the object to be detected. The holding plate 15, spring holder 19, and microphone holder 18 are coupled with screws 23.

The calculation device 50 is a printed circuit board 20 inside the detector 1.
It is composed of a functional section, a display section, etc., which performs calculation processing on each signal sent from.

The overall temperature described above operates as follows. When the temperature sensor 10 at the tip of the detector 1 is applied to the object to be detected,
The temperature signal is directly transmitted to the printed circuit board 20 through the conductor 26.
At the same time, a mechanical signal is transmitted to the diaphragm mounting member 11 through the detection needle 2, causing the diaphragm 21 to vibrate. The vibration of the diaphragm 21 propagates through the space inside the microphone holder 18 and is transmitted to the facing vibration sensor 16, and is sent as a vibration signal to the arithmetic unit 50 through the printed circuit board 20.

Arithmetic device 50 converts the signal from temperature sensor 10 into a saturation pressure for the measured temperature. It also stores the relationship between the vibration level and leakage amount according to the steam measurement temperature. The amount of steam leakage is calculated and displayed from this pressure and vibration level.

Since the tip of the temperature sensor 10 is integrally provided with a plate-shaped half-plane spring 3, it deforms along the cylindrical measurement point of the object to be detected, and the deformed entire surface measures the heat retained by the object to be measured. Inform sensor 10. Therefore, heat transfer from the object to be detected to the temperature sensor is sufficiently carried out in a short time, and the amount of steam leakage can be measured accurately and quickly.

[Brief explanation of the drawing]

Figure 1 is a block diagram of the present invention and a cross-sectional view of the detector.
FIG. 2 is an enlarged view of the tip of the detector. DESCRIPTION OF SYMBOLS 1...Detector, 2...Detection needle, 3...Plate semicircular spring, 10...Temperature sensor, 11...Vibration plate mounting member, 16...Vibration sensor, 20...Printed circuit board, 50... Arithmetic device, 51...cable.

Claims (1)

[Scope of utility model registration request] In a steam leakage measurement device that consists of a detector with a built-in vibration sensor and a temperature sensor, and an arithmetic device that processes electrical signals from the detector as input and determines whether the object to be detected is operating properly, A steam leakage measurement device that has a plate-like semicircular spring integrated with a temperature sensor at the tip of the sensor.