JPS6080613A - Operation of dust remover - 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] The present invention relates to a method of operating a dust remover in a sand settling basin or the like.

In sand settling ponds, etc., a screen is installed in the middle of the waterway,
The sieve residue accumulated on this screen is removed by a dust remover. Figure 1 illustrates such dust removal equipment, (1)
(3) is a screen installed in the middle of the waterway (2), and (3) is a screen installed on the upstream side of the screen (1).
) A dust remover that goes up and down along the screen (υ), (4) is the pump, 11, (R)
It v? r t5 years old/7'N l/ hayb'+
'n $ Z Conventionally, when operating the dust remover (3), for example, the timer control I was used to operate the dust remover (3) several times a day.
For example, when the level meter (5) detects that the water level in the waterway (2) has risen, the pump (4)
The dust remover (3) is also operated together with the dust remover (3).

However, in these conventional devices, the dust removal m (3) may be operated even when there is no sieve residue on the screen (1) k, which is undesirable. On the other hand, there is also the problem that even when a large amount of sieve residue accumulates on the screen (υ), the dust remover (3) may not operate.

Therefore, an object of the present invention is to start the dust remover according to the degree of accumulation of sieve residue on the screen, in order to operate the dust remover according to the original purpose of removing the sieve residue on the screen. .

In order to achieve this object, the present invention focuses on the fact that the water level difference between the upstream side and the downstream side of the screen fluctuates depending on the amount of sieve residue accumulated on the screen. To style aI, I-
When the water level difference on the downstream side 2 reaches a set value, this is detected and the dust remover is activated by the first detection signal.

Therefore, the dust remover can only be operated when a large amount of sieve sludge has accumulated on the screen and the water level difference between the upstream and downstream sides of the screen becomes large. , it is possible to prevent wasteful operation of the dust remover.

Examples of the present invention will be described below. FIG. 2 shows the first embodiment of the present invention, in which (6) is an electrode-type first stream side level meter provided on the downstream side of the screen (1), and (7) is the level meter on the first stream side of the screen (1). This is an electrode type downstream level meter installed on the downstream side. Each level meter (6) (7) has a plurality of electrodes (8) each having a different length.

In such a configuration, the upstream side of the screen (1).

Regardless of the absolute value of the water level on the downstream side, Figure 2 (a) to (
As shown in c), the difference in water level between the upstream and downstream sides is caused by the electrode (
8) When the temperature exceeds the level, start the dust remover (not shown). The sieve residue is removed by operating the dust remover, and the water level difference between the upstream and downstream sides is gradually reduced. When the water levels on the upstream and downstream sides match, stop the dust remover.

FIG. 3 shows a second embodiment of the invention. Here, (9) is a rod whose central part is swingably supported,
An upstream float aq and a downstream float 01) are suspended from both ends of this pole K (9).

(b) is the protection tube for the float OQOυ. When the water level difference between the upstream side and the upstream side increases, the rod body (9
) tilts significantly, which is detected by the starting limit switch a and starts the dust remover. As the water level difference decreases, the inclination of the rod (9) decreases as shown by the imaginary line, so
This is detected by the stop limit switch 0 fathom and the dust remover is stopped. In addition, as shown in the figure, the float α(1(l),
l is vertically elongated to cope with fluctuations in the absolute value of the water level.

FIG. 4 shows an eighth embodiment of the present invention.
The water level difference is detected by reading the difference using calculation T#iQQ.

Further, FIG. 5 shows a fourth embodiment of the present invention, in which an ultrasonic level meter a'71αη is used.

(g) can be seen using a calculator.

As described above, according to the present invention, when sieve residue accumulates in the sufuton, it can be removed reliably and wasteful operation of the dust remover can be prevented.

[Brief explanation of the drawing]

FIG. 1 shows a conventional example, and FIGS. 2 to 5 1. FIG. 2 is a diagram showing first to fourth embodiments of the present invention. (1)...Screen, (2)...Waterway, (3)...
...Dust remover, (6)...Upstream level meter, (7)...
・Downstream level J gauge, (9)...rod, frame...upstream float, (11)...downstream float, (a)...
Capacitive level meter, stem...Ultrasonic level meter. Agent Yoshihiro Morimoto is the second figure! ? ′! Figure 3 Figure 4'・Figure 15

Claims (1)

[Claims] 1. Dust removal characterized by detecting when the water level difference between the upstream side and the downstream side of the screen caused by the sieve residue accumulated on the screen reaches a set value of 1, and starting the dust remover with a detection signal. How to operate the machine.