JPH02107897A - Steam trap with steam leakage quantity measuring mechanism - Google Patents

Abstract

PURPOSE:To measure the steam leakage quantity by arranging a partition tube having an opening at the upper end and the lower end and extended at the lower end downward than the side end of the measurement chamber of a valve port at the lower section of the measurement chamber and providing a bulkhead tube extended at the lower end downward than the upper end of the partition tube and covering the upper section of the partition tube. CONSTITUTION:A microcomputer judges as normal if n electrode 16 is submerged in the condensed water and judges as steam leakage if it is not submerged. In case of steam leakage, the lower end of a partition tube 14 is submerged in the condensed water, and the leakage steam passes from the lower end of a bulkhead tube 15 and between the inner periphery of the bulkhead tube 15 and the outer periphery of the partition tube 14 and through the inside of the partition tube 14 and flows out to the outlet via a valve port 8. Only the leakage steam passes through the partition tube 14, thus the flow quantity of the leakage steam is measured based on the cross section area of the partition tube 14 by measuring the steam flow speed with ultrasonic transceivers 17a and 17b.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a steam trap that is attached to a steam piping system and automatically discharges only 1 U of water without letting steam escape. This invention relates to a device equipped with a mechanism that can measure the source of steam leakage.

When steam performs work and loses heat, it condenses into high-temperature water called condensate. Steam transport pipes and equipment that use steam need to discharge only condensate without letting steam escape.

A special valve for this purpose is a steam trap.

As fuel costs soar, steam leaks have come under increased scrutiny. The prerequisite for adopting a steam trap is that it does not leak steam. Even after the piping was installed, it was closely monitored, and the steam traps that drained the steam were repaired and actively replaced.

Prior Art and Problems to be Solved by the Present Invention Therefore, various steam trap leak detection devices have been developed and put into practical use.

One method is to place a heat exchanger on the inlet side of the steam trap, measure the amount of heat consumed by the heat exchanger, measure the front side discharged from the steam trap, and compare the two. , to determine whether there is a leak of live steam and to measure the leakage. In this case, it is necessary to remove the steam trap from the piping and attach it to the measuring device, and it is not possible to measure the steam 1 to lap with the piping still in place, which is time-consuming and inefficient in measurement.

In addition, a see-through window is provided in the casing of the steam trap or in the outlet piping of the trap to visually observe the state of the fluid inside. In this case, it is possible to check whether there is a steam leak, but it is not possible to measure the steam leak group.

Therefore, the technical problem of the present invention is to enable the measurement of vapor traps while the steam trap remains attached to the piping.

Means for Solving the Problems The technical means of the present invention aimed at solving the above-mentioned technical problems is to provide a measurement chamber with a casing, an inlet for introducing fluid into the upper part of the measurement chamber, and a lower part of the measurement chamber. The measuring chamber and the outlet are communicated through a valve port, and a valve body for opening and closing the valve port is attached to one end, and the other end of the lever is extended to the top of the measuring chamber. A float is placed at the top of the chamber, and the valve port is opened and closed by operating a lever as the float rises and falls.The valve port has openings at the top and bottom ends, and the bottom end extends below the measurement chamber side end of the valve port. A partition tube with a crest is placed at the bottom of the measurement chamber, a crested partition tube is provided such that the lower end thereof extends below the upper end of the partition tube and covers the top of the partition tube, and means for detecting the water level in the measurement chamber is provided; A means for measuring the flow velocity of the fluid passing through the partition cylinder is provided, and a means for calculating and displaying the flow rate from the flow velocity and cross-sectional area within the partition cylinder when the water level is below the reference water level is provided.

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

The inlet is connected to a point where condensate is generated from steam-using equipment, etc. If the steam trap operates normally and only condensate is discharged without steam escaping, the condensate at the inlet enters the measurement chamber and accumulates up to the natural hydration line of the float placed at the top of the measurement chamber. When the water level rises above this level, the float floats up, the valve body opens the valve port via the lever, and the condensate flows out to the outlet. When the water level drops due to discharge of condensate, the float descends and the valve body closes the valve port. In this case, since the water level in the measurement chamber does not fall below the natural water level of the float, it can be determined to be normal by the water level detection means provided in the measurement chamber.

When steam leaks from the steam trap, the water level in the measurement chamber drops to the opening end of the valve port on the valve side.

By detecting this drop in water level with a water level detection means,
Steam leaks can be detected. If this steam leak occurs, the bottom end of the partition tube is sealed with condensate, so
The leaked steam passes from the lower end of the partition cylinder, between the inner periphery of the partition cylinder and the outer periphery of the partition cylinder, and inside the partition cylinder, and flows out from the valve port to the outlet. Therefore, only the leaked steam passes through the partition tube, so by measuring the flow rate of this steam, the flow rate of the leaked steam can be measured from the cross-sectional area of the partition tube.

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

It is difficult to measure the flow rate of only steam from a mixed flow of steam and condensate, but according to the present invention, if a steam leak occurs, only steam passes through the partition cylinder, so it can be accurately measured. Steam leakage can be measured.

An example showing a specific example of the above technical means will be described (see FIG. 1).

A monitor 2 is attached to the main body 1 with bolts (not shown) to form a casing having a measurement chamber 3 inside. A gasket 4 is interposed between the main body 1 and the roof 2 to keep them airtight.

An inlet 5 and an outlet 6 are formed in the main body 1. Entrance 5 is measurement chamber 3
The condensate is introduced into the measuring chamber 3 by connecting to the upper part of the measuring chamber 3 and connecting to steam-using equipment (not shown).

A valve seat member 7 is screwed to the lower part of the measurement chamber 3, and the measurement chamber 3 and the outlet 6 are communicated through a valve port 8 formed by the valve seat member 7, so that the condensate in the measurement chamber 3 is discharged to the outlet 3.

Attach lever 9 to main body 1 with pin 10. The lever 9 can rotate using the pin 10 as a fulcrum. A valve body 11 is attached to one end of the lever 9 so that the valve port 8 can be opened and closed.

The other end of the lever 9 extends to the top of the measurement chamber 3.

A hollow spherical float 12 made of stainless steel thin plate is housed in a free state in the upper part of the measurement chamber 3. The float 12 floats on the condensate accumulated in the measurement chamber and ascends and descends with the water surface. When the float 12 floats up, the lever 9 is rotated clockwise and the valve body 11 opens the valve port 8. The condensate in the measuring chamber 3 flows away to the outlet 6.

When the water level decreases due to the outflow of condensate and the float 12 descends, the lever 9 rotates counterclockwise, the valve body 11 closes the valve port 8, and the outflow of condensate is stopped.

The reference number @13 is the float seat that determines the lowering position of the float.

A partition cylinder 14 whose upper and lower ends are open is arranged in the lower part of the measurement chamber 3. The lower end of the partition cylinder 14 is located below the opening end of the valve port 8 on the valve chamber 4 side. An inverted cup-shaped partition cylinder 15 is arranged to cover the upper part of the partition cylinder 14 and provide a gap between the outer periphery and the upper end of the partition cylinder 14.

An electrode 16 is attached to the lower part of the casing. Partition tube 14
A pair of ultrasonic transducers 17a1 and 17b are installed in the measurement chamber 3.
Installed diagonally opposite to the axis of the

The electrode 16 and the ultrasonic transducers 17a and 17b are connected to a microcomputer (not shown) via electric wires. The electrode 16 measures whether it is submerged in condensate in the measurement chamber 3 or not. This signal is input to the microcomputer. The microcomputer determines that the electrode 16 is normal if it is submerged in condensed water, and determines that there is a steam leak if it is not submerged. In the case of steam leakage, the microcomputer measures and displays the amount of steam leakage as described below.

The inner diameter of the partition tube 14 is D, the distance between the transducers 17a and 17M is 1-1, the angle between the line connecting the transducers 17a and 17b and the axis of the partition tube 14 is θ, and the inside of the partition tube 14 is If the flow velocity of flowing steam is V, and the propagation velocity of ultrasonic waves in this steam is C, then this is the time required for the ultrasonic pulse transmitted from the transducer 17a to be received by the transducer 17b. . Conversely, 2 is the time required for the ultrasonic pulse transmitted from the transducer 17b to be received by the transducer 17a. From equations (1) and (2), the flow velocity V is as follows. Steam leakage is measured from this flow velocity V and the inner diameter of the partition tube 14, and is displayed.

In addition, in normal case, micro combination 1-2 is in measurement room 3.
By calculating and displaying the flow rate from the inner diameter of the pipe and the flow rate of condensate passing through the partition cylinder, it becomes possible to measure not only steam leakage but also the condensate flow rate.

In the above embodiment, an ultrasonic flow rate measuring means was used, but
The present invention is not limited to this, and an electromagnetic type, a turbine type, or other flow rate measuring means can also be used.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a steam trap equipped with a steam leak amount measuring mechanism according to an embodiment of the present invention. 1° body 2: M 3° measurement 5 2 ports 6° outlet 8: Valve port 9° lever 11: Valve body 12, float 14: Partition tube 15: Partition tube 16, electrodes 17a and 17b = ultrasonic transducer

Claims (1)

[Claims] 1. Form a measuring chamber in the casing, an inlet for introducing fluid into the upper part of the measuring chamber, and an outlet for leading out the fluid at the lower part of the measuring chamber, communicate the measuring chamber and the outlet through a valve port, and open and close the valve port. The other end of the lever with a valve body attached to one end is extended to the top of the measurement chamber, a float is placed at the top of the measurement chamber, and the lever is operated by the rise and fall of the float to open and close the valve port. A partition tube with an opening at the lower end and a lower end extending below the measurement chamber side end of the valve port is placed at the bottom of the measurement chamber, and a lower end extends below the upper end of the partition tube and covers the top of the partition tube. A crested partition cylinder is provided, a means for detecting the water level in the measurement chamber is provided, a means is provided for measuring the flow velocity of the fluid passing through the partition cylinder, and when the water level is below the reference water level, the flow velocity in the partition cylinder is measured. A steam trap equipped with a steam leakage measuring mechanism, which is equipped with a means to calculate and display the flow rate from the cross-sectional area.