JPH0364649B2 - - Google Patents

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 equal intervals, a scraping device partially immersed in water is installed in a groove, and the device passes through the groove. all of the water passing through the scraping device. Furthermore, comb teeth 1 arranged at intervals equal to the thickness of the screen bar and rakes having a width equal to the interval between the screen bars,
As shown in Fig. 2, a device is widely used that engages with the scraping device 2 and rotates to move the large solids remaining on the scraping device 2 upwards and drop them from the upper end to separate them. There is.

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. Ru.

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 with regard to strength, but high precision welding requires advanced technology, and the precision of the product tends to be poor. Moreover, since the shafts are welded during manufacture, the high heat causes distortion in the shafts, causing distortions in the metal, which can lead to dimensional errors during use.

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

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

[Means for solving the problem] and [Operation] The present invention aims to solve the above problems,
Its structure is such that comb teeth in which rakes and spacers are arranged alternately are fixed to the outer periphery of the chain, and during one rotation of the chain, the chain passes through the underwater part and once in the upper part of the water, and the comb teeth come out of the water. In a solid material separation device in which a screen bar having a width equal to the spacer passes through while engaging with a scraping device installed at an interval equal to the width equal to the thickness of the rake to separate and fall the solid material. , the comb teeth are arranged on a shaft having a substantially square cross section, and a rake having a mounting hole that closely fits the shaft and a ring-shaped spacer having an inner circumference larger than that of the shaft are alternately mounted on the shaft. It is characterized in that each member can be disassembled by inserting the shaft and screwing both ends of the shaft, but is firmly connected.

In manufacturing comb teeth, the present invention disassembles the comb teeth into a rake, a spacer, a square shaft having a male thread at one end, and a nut that is screwed into the male thread, 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. many rakes 4
When the spacers 6 and 6 are alternately inserted into the shaft 3 from the male thread 32 side, 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 will not deviate. In addition, since the rakes 4 are arranged through the spacer 6, the gap between the rakes is the spacer 6.
The thickness matches the thickness of 7 is a support plate having a through hole matching 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 screwed into the male screw 32 protruding from the shaft 3. be. 10 is a hole for attaching to the chain.

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 an explanatory longitudinal cross-sectional view of this device, and Figure 4 is the third
It is a sectional view taken along the - line in the figure. 17 is a motor mounting base. Reference numeral 18 denotes an upper sprocket having a common rotation axis with the main shaft pulley 15. A chain 20 is suspended between this and a pair of lower sprockets 19, and the chain 20 is slowly rotated. A comb tooth 1 was attached to one location of the chain 20. Reference numeral 21 denotes a screen bar, the base of which is suspended and fixed to a support piece 22 having an L-shaped cross section. The other end of the screen bar 21 was not restrained, but was kept at a proper position by a bar bearing shaft 23 attached to the chain 20 with a gap. 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. The comb teeth 1 attached to the chain 20 suspended by the upper and lower sprockets 18 and 19 slowly rotate and begin to engage the gaps between the screen bar rows from a relatively lower part of the scraping device 2, as shown in FIG. As shown, the tip of the rake protrudes from the gap between the screen bars, moves the solids on the row of screen bars upward, and when the upper sprocket 18 is rotated, it disengages from the screen bar and the solids are removed from the screen. The solids fall into a solids receiving container (not shown) provided at the bottom of the tip of the bar.

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 adjustment plates 30 and 31 are provided on 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 adjustment plate is exactly the same as the thickness of rake 4,
The dimensional accuracy of the comb teeth 1 and the scraping device 2 is 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. Furthermore, even if the rakes are broken or bent, they can be replaced one by one, 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 drawings]

The drawings show an embodiment of the present invention, and 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. A 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 drawings, 1 is a comb tooth, 2 is a scraping device,
3 is a shaft, 4 is a rake, 5 is a mounting hole, 6 is a spacer, 13 is a drive motor, 14 is a motor pulley, 15 is a main shaft pulley, 16 is a belt, 18 is an upper sprocket, 19 is a lower sprocket, 2
0 is a chain, 21 is a screen bar, 22 is a support piece, 23 is a bar bearing shaft, 30 and 31 are adjustment plates, 32
is a male screw.

Claims (1)

[Scope of Claims] 1. Comb teeth in which rakes and spacers are arranged alternately are fixed to the outer circumference of a chain, and during one rotation of the chain, the chain passes through the underwater part and the water upper part once, and the comb teeth When the solids emerge from the water, a screen bar having a width equal to the spacer is engaged with a scraping device installed at a spacing equal to the thickness of the rake to separate and fall the solids. In the separation device, the comb teeth connect the rake, which has a mounting hole formed in the shaft with a substantially square cross section and a ring-shaped spacer whose inner periphery has a larger inner diameter than the shaft, to the shaft. 1. A solid matter separator characterized in that each member is removable yet firmly connected by inserting the shaft alternately into the shaft and screwing both ends of the shaft.