JPS6287799A - Ball fine tube washing device - Google Patents

Abstract

PURPOSE:To permit to measure the number of balls correctly even when a plurality of balls flow under adhered condition, permit to discriminate dust or faulty balls and prevent the faulty measurement of the balls by a method wherein optical devices, consisting of a projector and receptor, are arranged on a transparent tube in series and orthogonally to the direction of the flow of liquid in the tube. CONSTITUTION:Two sets of optical devices are arranged so as to be orthogonal to each other while respective projectors 13, 13a are provided with slits 22, 22a and projected light becomes fine slits of light. A time, in which a time, counted by the trigger signal of an upstream side receptor 14, is stopped by the trigger signal of the downstream side receptor 14a, or the flow speed of a ball is memorized in a dust discriminator 21. In case the dust flows through the tube, when the downstream side receptor 14a detects a substance within the time memorized in the dust discriminator 21 after the upstream side receptor 14 has detected the substance, it is decided that the substance is a spongy rubber ball 4, however, in case the downstream side receptor 14a has not detected the substance, the count of this time is cancelled out.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention removes deposits and foreign matter deposited in the thin tubes by circulating sponge rubber balls inside the thin tubes such as heat transfer tubes incorporated in a heat exchanger. The present invention relates to a ball tube cleaning device that is equipped with a device that automatically counts how many balls are collected during cleaning.

(Technical background of the invention and its problems) Conventionally, seawater has often been used as cooling water in heat exchangers, and marine organisms adhere to and accumulate in the thin tubes inside the heat exchanger, significantly reducing heat exchange efficiency. For this reason, a sponge rubber ball is circulated within this thin tube to remove the marine organisms that have adhered and accumulated, but this cleaning ball can be used for cleaning if it leaks out or becomes clogged. Since the number of balls gradually decreases, the number is periodically counted visually or by using an optical device.

As an example of a conventional device, a case where an optical device is used will be described with reference to FIG.

FIG. 4 shows a system for sending water collected from a water intake 1 by a water intake pump 2 to equipment 3 to be cleaned, such as a condenser in a power plant. 4, in order to guide the sponge rubber balls 4 in the ball collecting device 5 to the equipment 3 to be cleaned through the pipe, the ball collecting net 6 is rotated 90' to allow the sponge rubber balls 4 to pass through. The sponge rubber balls 4 guided to the equipment to be cleaned 3 clean the inside of the equipment to be cleaned using friction, and then go to the screen 7 where they are filtered by the ball filtration application net 8. This sponge rubber ball 4 is repeatedly washed through the above-mentioned system by the ball circulation pump 9. On the other hand, water that has passed through the ball filter application 11!8 is guided to the water outlet 10.

In the above system, in order to count the number of sponge rubber balls 4, a transparent tube 11 is installed between the ball circulation pump 9 and the ball collector 5, and a light signal guided from a light emitting circuit 12 is emitted from one side by a floodlight 13. On the other hand, a light receiver 14 is installed to receive the optical signal. Here, the light emitted by the floodlight 13 passes through the transparent tube 11,
By blocking the above optical signal received by the light receiver 14 and when the sponge rubber ball 4 passes through the transparent tube 11,
The light receiver 14 emits one pulse signal each time the sponge rubber ball 4 passes. This pulse signal is integrated by an integrator 15, and the +a+3 value is displayed on a counter 16.

However, when calculating the number of sponge rubber balls 4 by h1, if a plurality of balls passing through the transparent tube 11 are in close contact with each other, the projector 13 installed in the transparent tube 11
The optical signal between the optical receiver 14 and the optical receiver 14 is interrupted only once.
The problem is that the number of sponge rubber balls 4 that have passed through the transparent tube 11 is regarded as if -, and the number integrated by the integrator 15 does not match the number of sponge rubber balls 4 that have actually passed through the transparent tube 11. be.

In addition, when a piece of dirt close to the size of a sponge rubber ball passes by, it is counted as if the ball had passed, resulting in a higher number of balls than the actual number of balls.

Furthermore, even if the sponge rubber balls are worn out or cracked and become smaller and lose their ability to clean the tubules, they will be counted without distinguishing them from normal balls, so even if there are defective balls, they will not emit light. There wasn't.

[Purpose of the invention]

The present invention has been made in view of the above, and is a ball equipped with a ball counting device that improves the problem of accurately counting the number of sponge rubber balls even when a plurality of sponge rubber balls are in close contact with each other and pass through a transparent tube. An object of the present invention is to provide a capillary cleaning device.

[Summary of the invention]

In order to achieve the above object, the present invention installs two sets of emitter and receiver in a transparent tube in series at approximately the same interval as the diameter of the ball and at an angle of 90' to each other. It is characterized by providing stone slits to prevent miscounts caused by the passage of dirt, and to allow the number of defective balls to be counted if necessary.

(Embodiments of the Invention) Examples of the present invention will be described below with reference to FIGS. 1 to 3. Note that the same parts as in FIG. 4 are given the same reference numerals, and the explanation thereof will be omitted.

In FIG. 1, another projector 13a is installed on the transparent tube 11 downstream of the projector 13 at a distance approximately equal to the diameter of the sponge rubber ball 4, and at right angles to each other as shown in FIG. , the light signal from the light emitting circuit 12a is guided and received by the light receivers 14a located at right angles to each other at an interval approximately equal to the diameter of the sponge rubber ball 4 from the light receiver 14 on the upstream side.

In addition, each floodlight 13.138 has a slit 22.
．． 22a is provided to limit the width of the light emitted from the projector.

In the ball counting device having such a configuration, when the sponge rubber ball 4 passes between the light emitter 13 and the light receiver 14 on the upstream side, the light receiver 14 generates a pulse signal, and the pulse signal is sent to the trigger converter 17. The trigger is generated by the rising edge of the pulse signal. This trigger signal is guided to a time counter 18, which counts time from the time when the trigger signal is input.

The pulse signal from the light receiver 14 is also guided to a pulse width 11.1 counter, which measures the time during which the pulse from the light receiver 14 is ON. This time corresponds to the total time for one or Wa sponge rubber balls 4 in close contact to pass.

Next, the sponge rubber ball 4 is attached to the downstream floodlight 13a.
and the photoreceiver 14a, the photoreceiver 14a generates a pulse signal, which is transmitted to the trigger converter 17.
a, and a trigger is generated by the rising edge of the pulse signal. This trigger signal is guided to the time counter 18, which first stops the time measured by the trigger signal from the upstream side, and sends the time signal to the next divider 20. This time signal corresponds to the flow velocity of the sponge rubber ball 4 when it passes between the upstream optical device (that is, the emitter and the receiver).

By dividing the time signal from one pulse width time counter by the signal from the time counter 18 by the divider 2o, the number of passing sponge rubber balls 4 is calculated. However, if dirt with a similar shape to a ball passes by, there is a risk that it will be counted in the same way as a ball.

In the case of the present invention, as shown in FIG. 2, the two sets of optical devices are located at right angles to each other, and each of the projectors 13 and 13a is provided with a slit 22 and a slit 22a, so that the projected light can be It is shaped like a thin slit.

The dust discriminator 21 stores the time counted by the trigger signal of the upstream light receiver 14 and the time when the time is stopped by the trigger signal of the downstream light receiver 14a, that is, the flow velocity of the ball. When dust flows, after the upstream light receiver 14 detects the object, if the downstream light receiver 14a detects the object within the time stored in the dust discriminator 21, it is determined that it is a sponge rubber ball 4. However, if the downstream side light receiver 14a does not detect an object, the counting at this time is canceled. The slits 22 and 22a provide a narrow beam width, and the upstream and downstream optical devices are arranged at right angles to each other, making it easy to detect ball-shaped objects.

FIG. 3 shows an example in which a defective ball discriminator is installed in place of the dust discriminator 21 in FIG. 1.

In the figure, the output of the splitter 20 is input to a ball discriminator 23. An upper limit setter 24 and a lower limit setter 25 are connected to this ball discriminator, and in addition to an integrator 15 and a counter 16, an integrator 15a and a counter 16a for defective balls are also connected.

In the cast circuit having the above circuit configuration, the output of the divider 20 may not be a positive value. In other words, this is because the ball may become worn out or cracked, resulting in its size being different from its normal size.

Therefore, the output signal from the splitter 20 is transmitted to the ball discriminator 2.
3, and if the shape of the ball 4 is different, the upper limit and lower limit 1 shift of the allowable size are set in advance by the upper limit setter 24 and the lower limit setter 25, and the respective signals are sent to the ball discriminator 23. By inputting and making a determination, the number tl of normal balls is output to the integrator 15, and the number of defective balls 4 is output to the integrator 15a for defective balls. The signal from each v1 calculator 15.15a inputs the number m of normal balls to the normal ball counter 16;
In addition, the number of defective balls is displayed on the counter 16a for defective balls.
and display the respective quantities.

Although the embodiments of the present invention have been described above, the transparent tube for ball counting may be installed at any position in the system.

Furthermore, the number of transparent tubes will change depending on the amount of fluid, but in that case, the number of combinations of light emitters, light receivers, and calculation units may be increased by the number of transparent tubes.

In addition, the upstream and downstream optical devices were installed at approximately the same position as the spacing between the sponge rubber balls, but if you clarify the spacing beforehand and install it, you can input that spacing into the calculation section. It becomes possible to calculate the flow velocity of the ball at that time, and the same effect as above can be expected.

〔Effect of the invention〕

As described above, in the present invention, the optical device consisting of the emitter and the receiver is arranged in the transparent tube in series in the flow direction and at right angles to each other, so even if a plurality of balls flow closely together, the number of balls can be accurately determined. Since it is possible to measure m and also to determine whether it is dirt or a defective ball, it is possible to prevent the erroneous measurement of balls as in the past.

[Brief explanation of drawings]

Fig. 1 is a system diagram of a ball tube cleaning device according to an embodiment of the present invention, Fig. 2 is a perspective view explaining details of a part of the equipment shown in Fig. 1, and Fig. 3 is another embodiment of the present invention. FIG. 4 is a system diagram of a conventional ball tube cleaning device. 1... Water intake 2... Water intake pump 3... Equipment to be cleaned 4... Sponge rubber ball 5...
... Ball collection device 6 ... Ball collection net 7 ... Screen 8 ... Ball collection net 9 ... ...Ball circulation pump 10...
...Water outlet 11...Transparent tube 12.12a...Light emitting circuit 13.13a...Emitter 14.148...Light receiver 15.15a...Integrator 16 .168 Counter 17 Trigger converter 18 Time counter 19 Pulse width time counter 20
・・・・・・・・・vj calculator 21・・・・・・・Garbage discriminator 22.228...Slit

Claims (6)

[Claims] (1) In a ball capillary cleaning device in which a closed circuit is formed from a collector, a collector, etc. to remove deposits and foreign matter in the capillaries of the equipment to be cleaned, and sponge rubber balls are circulated within this closed circuit, Incorporating a transparent tube into a closed circuit to emit light,
1. A ball tube cleaning device comprising a plurality of optical devices for receiving light, and a ball counting device for counting sponge rubber balls by calculating the outputs of the optical devices. (2) The ball tube cleaning device according to claim 1, wherein the optical device includes a light receiving section and a light projecting section, which are arranged in series from the upstream side to the downstream side of the transparent tube. (3) The optical devices installed on the upstream and downstream sides of the transparent tube are spaced apart from each other by approximately the same diameter as the sponge rubber ball, and are installed at right angles to each other. ball tube cleaning device. (4) The arithmetic unit that processes the output of the optical device calculates the flow velocity of the sponge rubber balls, and also accurately counts the number of sponge rubber balls even if multiple balls pass through the optical device in close contact. A ball counting device for a ball tube cleaning device according to claim 1, characterized in that the ball counting device performs arithmetic processing. (5) A slit is provided in each of the light projecting parts of the optical device,
2. The ball tube cleaning device according to claim 1, wherein the ball tube cleaning device is configured to be able to distinguish between balls and dirt. (6) The output of a divider for determining the number of balls is led to a ball discriminator, and defective balls are determined based on the outputs of an upper limit setter and a lower limit setter. Ball capillary cleaning device as described.