JPH0236617Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a cleaning device equipped with a cleaning nozzle for cleaning between the outer surface of a feed pipe of a centrifugal separator and a mating component.

<Prior art> As roughly shown in Figure 3, a centrifugal separator consists of a bowl 1, a screw conveyor 2 located inside the bowl that rotates with a slight difference in rotation from the bowl, and a screw conveyor 2 that rotates at a constant rotation speed. Gear unit 11 that makes a difference
It is composed of Further, in the slurry that is continuously supplied from the feed pipe 3 to the feed compartment 31 in the hub 4, the solid content settles and the liquid content flows toward the drain port 5, and only the supernatant liquid passes over the weir plate 6. and is ejected from the aircraft. The solids are discharged from the discharge port 7 on the small end side by the screw conveyor 2 and sent to the next process through the solids discharge passage 10 of the cases 8 and 9 which are divided into two at the center of the separator.

A screw conveyor 2 having trunnions 15,16 at each end is supported by a conveyor bush 14 in bowl heads 12,13. Further, the feed pipe 3 is supported in a cantilever manner by a pipe bracket 19 fixed to the separator base 18. Conventionally, a structural gap 20 is provided between the feed pipe 3 and the mating component trunnion 16 and the pipe 23 in the screw conveyor hub 4 to prevent vibration contact during operation, as shown in FIG. ，
It has 24. Also, as shown in Figure 4,
Conventionally, there is a structure in which a cleaning pipe 32 is provided inside the feed pipe 3 and cleaning water flows between the pipe 32 and the other component.
Problems include increased fluid resistance within the tank, wear due to slurry, and outflow to the atmosphere when the amount of cleaning water increases.

<Problems to be solved by the invention> The centrifugal separator having the structure shown in FIGS. 3 and 5 described above has the following problems.

(1) If slurry is temporarily oversupplied from the feed pipe 3, solid matter may adhere or accumulate in the gaps 20 and 24 due to the slurry flowing from the feed compartment 31 to the atmosphere side. When the slurry falls from the tip of the feed pipe 3 into the compartment 31, droplets enter the gaps 20 and 24, causing solid matter to adhere.

(2) When the environment around the machine is poor, such as in a coal preparation factory, sand, dust, etc. in the atmosphere are sucked into the inside of the machine through the gap 20, and the surface of the trunnion 16 or the pipe 23 of the hub 4 of the screw conveyor 2. It sticks and accumulates inside.

(3) The solid content is transferred to the pipe 23 of the hub 4 of the conveyor 2.
If the growth adheres to the inner surface or the inner surface of the trunnion 16, the feed pipe 3 with a cantilever support structure
is vibrating during operation, contact may occur,
If the adhesion becomes severe, repeated wear and contact will cause
Feed pipe 3 breaks.

Therefore, in view of the above-mentioned drawbacks, the present invention has developed a centrifugal system that prevents solid matter in slurry, sand in the atmosphere, dust, etc., from adhering to or accumulating in the gaps, and also prevents breakage of the feed pipe due to adhesion to the gaps. The purpose is to provide cleaning equipment for separators.

<Means for Solving the Problems> The present invention achieves the above-mentioned object by attaching and detaching a cleaning nozzle to the outer periphery of the feed pipe for spouting cleaning fluid into the gap between the feed pipe and the opposing part of the centrifuge body. The feed pipe is characterized in that the feed pipe is provided with variable positioning in the axial direction with respect to the feed pipe.

<Operation> Using the negative pressure inside the machine generated during operation and the discharge pressure from the cleaning nozzle, cleaning water is sent into the machine through the gap, and the pipes of the screw conveyor hub and the
Clean between the trunnion and feed pipe.

<Example> Here, an example of the present invention will be described with reference to FIGS. 1 and 2. Note that the same parts as in FIGS. 3 and 5 are given the same reference numerals. Figure 1 shows the cleaning nozzle 33.
Shown with the attached.

The cleaning nozzle 33 is inserted into the outer periphery of the feed pipe 3 and fixed between the feed bracket 19 and the thrust cap 26 by a set bolt 25. The fixation is set in the axial direction at a position where suction into the gap 20 between the trunnion 16 and the feed pipe 3 is optimal, and in the circumferential direction based on the position of the wash water discharge hole 27.

The cleaning nozzle 33 is shown in FIGS. 2a and 2b. The cleaning nozzle 33 has a cleaning water discharge hole 27, a cleaning water reservoir 28,
It consists of a cleaning nozzle connecting port 21 and a boss 30 for inserting these into the feed pipe. A screw 25 for fixing the cleaning nozzle 33 is provided on the outer periphery of the boss 30.

The number of cleaning water discharge holes 27 may be provided all around the circumference. When the cleaning nozzle 33 is set in the proper position, the cleaning water fills the reservoir 28 from the nozzle connection port 21 and is discharged from the multiple cleaning water discharge holes provided on the end face of the boss 30 on the thrust bearing cap 26 side. , is ejected toward the gap 20 of the feed pipe 3 of the trunnion 16. Even if the ejection speed is small, once it enters the gap 20, the inside of the machine becomes negative pressure, so it is inevitably sucked in.

The cleaning water that has entered between the trunnion 16 and the feed pipe 3 flows through the trunnion 16 and the feed pipe 3.
While cleaning the solid matter adhering to the outer surface or attempting to adhere, it flows into the inside of the machine, reaches the feed compartment 31, and is discharged out of the machine together with the slurry. The amount of cleaning water does not need to be sufficient to fill the gap between the feed pipe 3 and the trunnion 16 on the other side, but it is sufficient to prevent solid matter from adhering to the gap and clogging the gap.

If the oversupply of slurry is temporary, the slurry will flow back toward the gap 20, but as soon as normal supply returns, the solids will be washed away by the flushing water, and the slurry will flow back to the feed pipe 3 and the other side. Prevent residual blockages from forming in the gaps.

<Effects of the invention> As explained above, according to the invention, it is possible to prevent solid matter from adhering to or clogging the gap between the feed pipe and the mating parts (trunnion or conveyor hub pipe), and to prevent abnormal vibrations of the machine and damage to the outer peripheral surface of the feed pipe. Abrasion and breakage can be prevented, and if the cleaning nozzle becomes unnecessary as a result of operation, it can be easily removed.Furthermore, since the setting position of the cleaning nozzle is variable, the discharge pressure from the cleaning nozzle can be set appropriately. Can be done.

[Brief explanation of drawings]

1 and 2 show an embodiment of the present invention, in which FIG. 1 is a partially enlarged sectional view of a centrifuge mainly showing the cleaning nozzle, FIG. 2a is a front view of the cleaning nozzle, and FIG.
Figure b is a sectional view of a cleaning nozzle, Figures 3 to 5 are an example of a conventional centrifugal separator, Figure 3 is a half-section view of the whole, Figure 4 is a sectional view of another example of a feed pipe, and Figure 5 is a cross-sectional view of another example of a feed pipe. FIG. 5 is a partially enlarged sectional view. In the drawing, 16 is a trunnion, 23 is a pipe, 2
0 and 24 are gaps, 31 is a feed compartment, 19 is a feed bracket, 25 is a set bolt, 27 is a cleaning water discharge hole, 30 is a boss, and 33 is a cleaning nozzle.

Claims (1)

[Scope of utility model registration request] A cleaning nozzle that squirts cleaning fluid into the gap between the feed pipe and the other side of the centrifuge body.
A washing device for a centrifugal separator, which is removably attached to the outer periphery of the feed pipe and has variable axial positioning with respect to the feed pipe.