JPS63151309A - Solid separation apparatus - Google Patents

Abstract

PURPOSE:To provide the title apparatus easy to assemble and disassemble, avoid metal stress due to welding and having good accuracy and durability, by constituting comb teeth by alternately inserting rakes and spacers in a square shaft. CONSTITUTION:In a solid separation apparatus wherein comb teeth consisting of a large number of rakes meshes with a large number of screen bars, the comb teeth fixed to the outer periphery of a chain is constituted by alternately mounting the rakes 4 having mount holes densely engaging with a square shaft 3 having a square cross-section provided thereto by drilling and ring-shaped spacers 6 each having an inner periphery larger than the outer periphery of the shaft 3 to said square shaft 3 and the width between the screen bars is made equal to the thickness of each spacer 6. Since each member has a simple shape, the comb teeth can be prepared with high accuracy and, since assembling and disassembling are easy and welding is unnecessary, no stress remains in a metal and, further, since the square cross-section of the shaft 3 coincides with the square of the mount hole 5, deviation of the fitting angle of each rake 4 can be prevented.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is a device for removing large solids mixed in water, especially as a pre-treatment for wastewater treatment, for use in small-scale wastewater from feeding centers, leather manufacturing factories, etc. The present invention relates to a device for removing suspended solids.

[Conventional technology]

As a device for removing large solids mixed in water, screen bars of equal thickness are arranged at regular intervals, and a scraping device partially immersed in water is installed in a groove, and the water passing through this groove is removed. so that all of it passes through the scraping device. Furthermore, as shown in FIG. 2, the comb teeth 1, in which rakes with a width equal to the spacing of the screen bars are arranged at intervals equal to the thickness of the screen bars, are engaged with and rotated with the scraping device 2. 2. Devices are widely used that move the large solids remaining on the top of the container upwards and drop them from the top to separate them.

The comb teeth used in such devices include those made of plastic integrally molded into the shape of comb teeth, and those made of a metal material such as stainless steel welded into the shape of comb teeth.

[Problem that the invention seeks to solve]

This type of equipment requires a high degree of dimensional accuracy and strength because the comb teeth made up of many rakes and the scraping device made up of many screen bars repeatedly engage to remove all large solids that get mixed into the wastewater. .

Plastic comb teeth can have satisfactory dimensional accuracy if the mold is precisely manufactured, but they break easily and have problems in terms of strength and durability. Since metals such as stainless steel have complex shapes, it is difficult to mold them in one piece, so a manufacturing method is adopted in which a rake is welded to the shaft. In this case, there is no problem in terms of strength, but high precision welding requires advanced technology, and the precision of the product tends to be poor. In addition, because they are welded during manufacture, the high heat causes distortion in the shaft, causing distortion in the metal, which can cause dimensional errors during use.

Furthermore, since both are integrally formed or welded, if a rake breaks, it is impossible to replace just one rake, and the entire comb teeth must be replaced. It became expensive.

Therefore, there has been a need for a comb tooth that maintains a high degree of dimensional accuracy, is made of metal, is manufactured without welding, and allows the rake to be replaced one by one.

[Means for Solving Problems] and [Operations] The present invention aims to solve the above-mentioned problems, and consists of a rake having a shaft with a square cross-section and a mounting hole that closely fits the shaft. Comb teeth made by alternately attaching ring-shaped spacers with a circumference larger than the shaft to the shaft are fixed to the outer circumference of the chain, and the chain passes through the underwater part and the water part once each during one rotation of the chain 7. When the comb teeth exit the water, a screen bar having a width equal to the spacer passes through a scraping device installed at a spacing equal to the width of the rake. do.

In manufacturing comb teeth, the present invention disassembles the comb teeth into a rake, a spacer, and a square shaft, and inserts the rake and spacer alternately into the square shaft. Therefore, since each member is reduced to a simple shape during manufacturing, it is easy to manufacture with high precision, and assembly and disassembly are also extremely easy.

Furthermore, since high heat is not applied due to welding, no distortion remains in the metal, making it possible to provide highly accurate and durable comb teeth. Furthermore, since a square shaft is used, there is no risk of the rake installation angle shifting.

〔Example〕

FIG. 1 is an exploded perspective view of one embodiment of a comb tooth 1 according to the present invention. Reference numeral 3 denotes a shaft with a square cross section, which is tightly fitted into a mounting hole 5 formed in the base of a rake 4 made of stainless steel. Reference numeral 6 denotes an annular spacer, and although it is sufficient if the inner circumference is larger than the shaft 3, in this embodiment, the inner circumference is circumscribed to the shaft 3. When a large number of rakes 4 and spacers 6 are inserted alternately into the shaft 3, the square cross section of the shaft 3 and the square of the mounting hole 5 match, and the mounting angle of the rake 4 does not deviate. Further, since the rakes 4 are arranged via the spacer 6, the mutual gap between the rakes matches the thickness of the spacer 6, and high dimensional accuracy can be obtained. 7 is a support plate having a through hole that matches the outer shape of the shaft 3;
8 is a washer having a recess inside, 8' is a flat washer, and 9 is a nut that is screwed into a female thread protruding from the shaft 3. Reference numeral 10 denotes a mounting hole for the check 7.

FIG. 2 is a perspective view showing the state of use of the solid matter separator, in which the entire solid matter separator of the present invention is inserted and installed into the groove 11 shown by the imaginary line. A frame 12 is provided at both ends of the device, but rubber gaskets or the like are inserted to prevent water from flowing through the gap between the frame and the side surface of the groove. 2 is a scraping device. Reference numeral 13 denotes a drive motor, and its rotation is transmitted to the main shaft pulley 15 via a motor pulley 14 and a belt 16.

Figure 3 is a longitudinal cross-sectional explanatory diagram of this device, and Figure 4 is IV of Figure 3.
-IV line sectional view. 17 is a motor mounting base.

18 is an upper sprocket having a common rotation axis with the main shaft pulley 15, and a pair of lower sprockets 19
A check 720 is suspended between the two, and the check 720 is slowly rotated. A comb tooth 1 was attached to one place of the Che 720. Reference numeral 21 designates a screen bar, the base of which is suspended and fixed to a support piece '22 having an angular cross-section. screen bar 21
The other end was not restrained and was kept at a proper position by bar bearing shafts 23 that were intermittently attached to the chain 720. In this embodiment, a nylon round bar was used as the bar bearing shaft 23.

In Figure 3, water flows from left to right.

Solids in the water accumulate on the scraping device 2 in which screen bars 21 are arranged in parallel. Upper and lower sprockets 18.1
The comb teeth 1 attached to the chain 20 suspended from the comb teeth 9 rotate slowly and begin to engage the gaps between the screen bars from a relatively lower part of the scraping device 2, as shown in FIG. The tip of the rake protrudes from the gap with the screen bar, moves the solids on the screen bar row upwards, and when the upper sprocket 18 is rotated, it loses its hold on the screen bar, and the solids are placed at the bottom of the tip of the screen bar. The solid object falls into a container (not shown).

In this embodiment, one comb tooth 1 is attached to the chain, but two or more comb teeth 1 may be attached.

FIG. 5 shows another embodiment, and is an exploded perspective view of the screen bar attached to the support piece.

The base of the screen bar 21 is fixed to the support piece 22 by various means such as welding or machining, but in this embodiment, two adjusting plates 30 and 31 are attached to one or both sides of the base of the screen bar. They were welded at a distance equal to or greater than the thickness of the support piece 22. If the thickness of the adjusting plate is exactly the same as the thickness of the rake 4, the dimensional accuracy of the comb teeth 1 and the scraping device 2 can be maintained at a high level.

〔effect〕

According to the present invention, the comb teeth are disassembled into metal members with a simple structure and assembled for use, so sufficient strength is maintained, and no heating process is required during manufacturing, so dimensional deviations do not occur. Additionally, even if the rake breaks or bends, it can be replaced one tree at a time, resulting in significantly improved durability. Furthermore, since a gap is created between the spacer and the shaft with a square cross section, the overall weight is reduced, the load on the chain is also reduced, and the durability of the entire device is improved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is an exploded perspective view of the comb teeth, FIG. 2 is a perspective view showing the state of use, FIG. 3 is an explanatory longitudinal cross-sectional view, and FIG. -IV line sectional view and FIG. 5 are exploded perspective views of the embodiment showing how the screen bar is attached to the support piece. In the drawing, 1 is a comb tooth, 2 is a scraping device, 3 is a shaft, 4 is a rake, and 5
is a mounting hole, 6 is a spacer, 13 is a drive motor, 14
is the motor pulley, 15 is the main shaft pulley, 16 is the belt, 1st is the upper sprocket, 19 is the lower sprocket, 20 is the chain, 21 is the screen bar, 22 is the support piece, 23 is the bar bearing shaft, 30.31 is the adjustment plate It is.

Claims (1)

[Scope of Claims] A shaft with a square cross section is provided with a rake having a mounting hole that tightly fits into the shaft and a ring-shaped spacer whose inner circumference is larger than that of the shaft, which are alternately attached to the shaft. The comb teeth are fixed to the outer periphery of the chain, and the chain is rotated so that it passes through the underwater part and the water upper part once each during one rotation, and when the comb teeth exit the water, the comb teeth have a width equal to that of the spacer. A solids separation device characterized in that the screen bar passes through a scraping device installed at an interval of equal width to the rake.