JPS6231138Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE PRESENT DISCLOSURE The present invention relates to a centrifuge having solid scraping blades used to separate solids contained in a liquid from the liquid.

An example of a conventionally used centrifugal separator with solids scraping blades will be explained with reference to FIGS. It is supported to rotate at high speed, and a rotary shaft c is rotatably provided in the outer shell b concentrically with the outer shell b, and the rotary shaft c is also rotated at high speed in one direction by a motor. It's getting old. A screw blade d is fixed to the outer periphery of the rotating shaft c, and an inner barrel e is attached to the inside of the rotating shaft c.
is formed.

The stock solution containing solids is supplied to the inner shell e through the feed pipe f, and is passed from the inner shell e to the inner shell discharge port g by the centrifugal force caused by the high speed rotation of the rotating shaft c.
It is sent into the outer shell b. The stock solution entering the outer shell b is subjected to centrifugal force due to the high speed rotation of the outer shell b, solids in the stock solution collect on the inner peripheral wall side of the outer shell b, and the liquid is discharged from the discharge port h to the outside of the outer shell b. be done. The solid matter collected on the inner circumferential wall side of the outer shell b is scraped off by the screw blade d, sent to the right in FIG. 1, and discharged from the discharge port i into the casing a. The solid matter discharged into the casing a naturally falls and is discharged to the outside from the chute j.

By the way, if the solid material discharged from the discharge port i into the casing a is sticky, the solid material discharged from the discharge port i will adhere to the inner surface of the casing a and may not fall toward the chute j. be.
In order to scrape off the solid matter adhering to the inner surface of the casing a and drop it into the chute j, a scraping blade l is attached to the outer periphery k of the outer body b near the discharge port i. This scraping blade l is the second
As shown in Figures 3 and 3, the outer shell b is
is fixed at the outer periphery k. As this scraping blade l rotates together with the outer shell b, most of the solids adhering to the inner surface of the casing a fall into the chute j (see Figure 1), but some solids The object rebounds due to the collision with the scraping blade l, and collides with the root p of the scraping blade l in front of the outer body b in the rotational direction n. As a result, the root p of the scraping blade l and the outer body b in this vicinity are worn out, resulting in wear and tear on the machine.

The purpose of this invention is to prevent wear of the outer body near the base of the solid matter scraping blade and to make the centrifuge durable for long-term use. This invention relates to a centrifugal separator in which a protective plate having a circumferential width of 5 to 40 mm is attached to the outer periphery of the outer shell.

Embodiments of the present invention will be described below based on the drawings.

FIG. 4 is a sectional view similar to FIG. 3 showing an embodiment of the present invention, in which an outer shell 3 is provided inside the casing 1 and rotates at high speed in the rotational direction 2. A discharge port 5 is bored in the outer periphery 4 of 3. From this discharge port 5, the solid matter separated from the liquid within the outer shell 3 is discharged into the casing 1, as in the conventional case.

A solid matter scraping blade 6 is fixed to the outer periphery 4 of the outer body 3 near the discharge port 5 by a bolt 7,
A protection plate 9 is integrally formed with the solid material scraping blade 6 from the root 8 of the solid material scraping blade 6 toward the front in the rotational direction 2. The protection plate 9 is brought into close contact with the outer periphery 4 of the outer shell 3 together with the solid matter scraping blade 6.

Some of the solid matter adhering to the inner surface of the casing 1 will collide with the front surface 10 of the solid matter scraping blade 6 and the protection plate 9, but the solid matter will not collide with the outer periphery 4 of the outer shell 3. will be prevented. As a result of experiments, it was found that a width 11 of the protective plate 9 of 5 mm or less is not effective, and that a width of 40 mm or more is not necessary. Therefore, the width 11 of the protection plate 9 may vary depending on the size of the centrifuge, the rotation speed of the outer shell 3, etc.
You will have to choose between mm and 40mm as appropriate.

Since solid objects collide with the front surface 10 of the solid object scraping blade 6 and the protection plate 9, anti-wear measures are taken, but since wear is unavoidable, they must be repaired or replaced with new ones. However, the outer shell 3 can withstand long-term use without wear and tear.

FIG. 5 shows another embodiment of the present invention, in which the same parts as in FIG. 4 are given the same reference numerals.

In the embodiment shown in FIG. 5, a wide protective plate 13 is manufactured separately from the solid material scraping blade 12, and with the protective plate 13 laid under the solid material scraping blade 12, bolts 14 are attached. It is fixed to the outer body 3. The protection plate 13 protrudes from the root 15 of the solid matter scraping blade 12 toward the discharge port 5 to protect the outer periphery 4 of the outer body 3.

As explained above, in this invention, a protection plate with a width dimension in the outer circumferential direction of 5 to 40 mm is attached to the outer periphery of the outer shell in connection with the solid object scraping blade, so that the outer periphery of the outer shell is protected against collisions of solid objects. It prevents wear and is effective for long-term use.

[Brief explanation of the drawing]

Figure 1 is a longitudinal cross-sectional side view of the conventional device, and Figure 2 is the 1st
Fig. 3 is an enlarged view of the main part of Fig. 2, Fig. 4 is an enlarged view of the main part of one embodiment of the present invention, and Fig. 5 is an enlarged view of the main part of another embodiment of the present invention. It is a diagram. 1 is a casing, 3 is an outer shell, 4 is an outer periphery, 5 is a discharge port, 6 and 12 are blades for scraping off solid matter, 8 and 15 are bases, and 9 and 13 are protection plates.

Claims (1)

[Scope of utility model registration request] an outer shell that is provided in a casing and rotates in one direction; a discharge port that is provided on the outer periphery of the outer shell and discharges solid matter separated from the liquid in the outer shell from inside the outer shell into the casing; A solid matter scraping blade attached to the outer periphery of the outer body so as to protrude near the outlet, and a protection plate attached to the outer periphery of the outer body so as to be connected to the root of the solid matter scraping blade. , and the width of the protective plate in the outer circumferential direction is 5 to 40 mm.
A centrifugal separator having solid matter scraping blades.