JPS63199996A - Operation decision device for steam trap - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention measures the operating status of a steam trap, that is, whether it is leaking steam or not, and its leakage peak, and also measures the actual operating time of the steam trap. The present invention relates to a steam trap operation determination device for accurately grasping changes in the steam trap over time based on the operating state and actual operating time.

A steam trap is attached to a steam line or equipment that uses steam, and automatically drains only condensate without leaking steam. As fuel costs soar, steam leaks are being increasingly monitored. The prerequisite for adopting a steam trap is that it does not leak steam. Even after the piping is installed, it is closely monitored, and steam traps that leak steam are repaired or proactively replaced.

BACKGROUND ART As a conventional steam trap operation determination device, for example,
This was proposed as Japanese Patent Application No. 1987-87432. This is achieved by measuring the amount of leakage from each steam trap with a steam leakage amount detector, transmitting the results to the host computer, understanding changes in the steam trap over time, and determining in advance the timing of correction and replacement based on the amount of leakage. , the timing for correction and replacement is automatically determined.

However, steam traps are used in a variety of applications and locations, such as in the middle of various steam lines, at the end of pipes, and at the inlet and outlet of various steam-using devices. reach the number of individuals. Therefore, determining the operation of each steam trap requires a great deal of effort and time.

Therefore, it may be possible to estimate the lifespan of the steam trap and perform correction and replacement in a planned manner to save labor on maintenance. However, the service life of a steam trap cannot be easily and accurately estimated because it differs not only depending on the model but also on usage conditions such as the pressure, temperature, amount of drain generated, and water quality.

Further, as an operating time integrator for a steam trap, for example, there is one disclosed in Japanese Patent Application Laid-open No. 74998/1983. This is a method in which a thermocouple is connected to an integrated energization time meter consisting of a mercury column and an electrolytic solution, and the mercury column moves in proportion to the thermoelectromotive force, thereby integrating the actual operating time. This makes it possible to grasp the actual operating time of each steam trap.

Problems to be Solved by the Invention In the former prior art described above, it is not clear when to correct or replace the steam trap unless each individual steam trap is measured. Furthermore, in the latter case, although the actual operating time of each steam trap can be accurately grasped, it is impossible to determine whether correction or replacement should be carried out.

The technical problem of the present invention is therefore to measure a limited number of representative steam traps, without having to measure each individual steam trap, to correct or replace steam traps of the same type and conditions of use. To make it possible to predict the timing easily and accurately.

Means for Solving the Problems The technical means of the present invention taken to solve the above-mentioned technical problems is to use a steam leakage detector to determine the operation of the steam trap and measure and store the leakage amount, The actual operating time of the steam trap is measured and memorized using a time totalizer, and the above stored data, steam trap model and usage conditions are transmitted to the host computer, and the host computer calculates the actual operating time for each model and usage condition. The system is designed to record and display the operation judgment results and leakage measurement results.

action The operation of the above technical means is as follows.

The operation of the steam trap is determined and the amount of leakage is measured using a steam leak amount detector, and the actual operating time of the steam trap is measured using an operating time integrator. The operation determination, leakage measurement results, and actual operating time measurement results are stored in a part of the memory of the steam leakage detector, and after inspection of all steam traps, the stored data is transmitted to the host computer.

The host computer records and displays changes in the amount of leakage over time for each steam trap model and usage condition based on actual operating hours.

Once a limited number of representative steam traps are measured over their lifetime, it is possible to accurately determine the type of each steam trap, usage conditions, and changes over time for each actual operating time.

Therefore, it is necessary to install a new steam trap or
After the service life has been reached and the steam trap has been replaced, the time for corrective replacement can be predicted based on the new steam trap type and usage conditions without having to measure each individual steam trap.

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

Using the measurement data once recorded in the host computer, it is possible to easily and accurately predict when to correct or replace traps of the same type and usage conditions.

Furthermore, by aggregating the measurement results for each factory and plant on the host computer, it is possible to predict the correction and replacement timing for a wide variety of trap types and usage conditions.
Maintenance labor can be greatly reduced, and by timely extracting defective traps and correcting and replacing them, steam leakage can be prevented and energy can be saved.

Embodiment An embodiment illustrating a specific example of the above technical means will be described (see FIG. 1.2.3).

The steam trap operation determination device of the present invention comprises a steam leak amount detector 1, a calculation display 2, a host computer 3, and an operating time integrator 21 attached to the steam trap 20.

As shown in FIG. 2, the operating time totalizer 21 is constructed by placing an electrolytic solution 23 between a transparent glass cylindrical container 22 and storing mercury columns 24.2.
5 is enclosed and a thermocouple 26 is connected to it.

The thermocouple 26 is made by joining thermocouple wires 27 and 28 made of two types of conductors at one end 29. This junction point 29 forms a temperature measurement point (high temperature point) and is placed in a high temperature area such as the surface of the steam trap 20. Compensation lead wires 30 and 31 are connected to the other ends of the thermocouple wires 27 and 28, respectively, and the operating time totalizer 21
Connect to terminals 32 and 33 of. The junction point 34.35 between the thermocouple wire 27.28 and the compensating lead wire 30.31 forms a reference junction point (low temperature point) and is maintained at outside temperature. A resistor 36 is interposed in this power supply circuit so that an appropriate current is supplied to the operating time integrator 21 within the rated value.

The thermocouple 26 generates a thermoelectromotive force according to the temperature difference between the temperature measurement point 29 and the reference junction point 34.35 due to the Seebeck effect, and direct current is applied to the terminal 32.33 of the operating time totalizer 21, and this electricity is One side of the mercury column 24.25 is electrolytically deposited and moves to the other side in proportion to the amount.

When high temperature condensate flows into the steam trap 20 (see Figure 3), the temperature measurement point 29 becomes high temperature, and the mercury column 24.25 moves according to the temperature difference with the reference junction point 34.35, and the steam trap 20 actual operating hours are displayed. This situation can be confirmed through the transparent container 22.

A trap operation detection part 1 is installed at one end of the steam leak amount detector 1.
0, and an image sensor 11 is formed at the other end. The actual operating time of the steam trap 20 is read by the image sensor 11 through the transparent container 22 of the operating time totalizer 21, and is input to the microcomputer 6 of the calculation display 2 via the cable 12. Using a key switch (not shown) provided on the outer surface of the calculation display 2, the steam trap 20 model, pressure, temperature, drain generation amount, water quality, and other usage conditions are input into the microcomputer 6.

The signal captured by the operation detection section 10 is taken into the calculation display 2 via the cable 12, amplified by the amplifier 4, digitally converted by the analog/digital converter 5, and input to the microcomputer 6.

The microcomputer 6 calculates the presence or absence of leakage and the amount of leakage and displays them on the display section 7, and also stores the actual operating time of the trap, the model, usage conditions, operation judgment, and leakage amount data in the memory part 8.

After checking all the steam traps, the measured data stored in the memory part 8 is sent to the post computer 3 via the cable 13 from the data transmission part 9.

The host computer 3 records the measured actual operating time of the trap, the operation determination result, the leakage amount, the model and each usage condition, and aggregates, analyzes and displays the changes over time of the trap for each model and usage condition.

Using the recorded data, it is possible to easily and accurately predict when to correct or replace steam traps of the same type and usage conditions.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of the configuration of the steam trap operation determination device of the present invention, Fig. 2 is a configuration diagram and sectional view of the operating time totalizer, and Fig. 3 is a schematic diagram of the operating time totalizer attached to the steam trap. It is. 1: Steam leak amount detector 2: Calculation display 3: Host computer 4: Amplifier 5: Digital/analog converter 6: Microcomputer 7: Display section 8: Part of memory 9: Data transmission section 10: Operation detection section 11 : Image sensor 20 Nisteam trap 21 : Operating time totalizer

Claims (1)

[Claims] 1. Measure and store the operation judgment and leakage amount of the steam trap with the steam leak amount detector, measure and store the actual operating time of the steam trap with the operating time totalizer, and record the above stored data and the steam trap model. This steam trap operation determination device transmits the information and usage conditions to a host computer, and records and displays actual operating time, operation determination results, and leakage measurement results for each model and usage condition on the host computer.