JP2011224448A - Precipitate removing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a precipitate removing apparatus having superior precipitate removing performance, and preventing slippage between a driving pulley and a belt.SOLUTION: The precipitate removing apparatus includes: a dirty liquid tank 11 receiving dirty liquid containing a precipitable matter; an endless belt 26 which is circulated inside and outside the dirty liquid tank 11, moves in the dirty liquid tank 11 with a belt inner face set upward so as to deposit the precipitate S on the belt inner face and has a backwardly directed moving path 42; and a driving pulley 22 pressing the belt inner face with given tension. Protrusions 71 are set on the outer face of the driving pulley 22 and extended in the axial direction of the pulley. A plurality of lateral crosspieces 72 preventing precipitate slipping and engageable with the protrusions 71 are set on the inner face of the belt 26 in the belt moving direction at constant spaces.

Description

  The present invention relates to a deposit removing apparatus that removes a deposit (sediment) such as sludge from a sewage liquid such as coolant used for grinding a machine tool, for example.

  When the workpiece is a magnetic material such as iron, it is generally performed to remove sludge or the like by attracting it with a magnet.

  When the work is a non-magnetic material, the following is performed.

1. After fully depositing the precipitate in the septic tank, the supernatant is transferred to another container and scraped out from the septic tank with a scoop or the like.

2. The sludge and liquid are agitated and pulled out with a pump and processed with a centrifuge.

3. The sludge at the bottom of the septic tank is allowed to settle, and the scraping blade is directly driven by a chain drive and scraped up. In this case, fine sludge or the like does not rise, and the sediment that has been scraped has a high moisture content and is inefficient.

  The above-mentioned method needs to be performed frequently in a short time, and is inefficient for manpower and cost.

  Therefore, in order to solve the above-mentioned problems, the present applicant has previously proposed a precipitate removing device. That is, this sediment removing apparatus is a septic tank in which septic liquid containing sedimentable substances is placed, and is circulated over the inside and outside of the septic tank and the inside of the sewage tank faces the belt outer surface with the belt outer surface facing up. An endless belt having a backward movement path that moves so as to deposit sediment, and a drive pulley whose inner surface is pressed with a predetermined tension are provided, and a plurality of sediment slides are provided on the outer surface of the belt. Stop horizontal bars are provided at regular intervals in the belt moving direction. (For example, refer to Patent Document 1).

  According to this type of precipitate removing device, the precipitate can be efficiently removed, but there are the following problems in terms of maintenance.

  The belt is always moved around the drive pulley while being wetted by the waste liquid in the waste tank. At this time, the sewage is bitten between the belt inner surface and the drive pulley outer surface. There is a cross rail on the outer surface of the belt, but the inner surface of the belt is smooth. For this reason, there is a risk of slipping between the belt inner surface and the drive pulley outer surface. In order to reliably transmit the power of the driving pulley to the belt, it was necessary to set the tension appropriately, but this was not easy.

JP 2007-061781 A

  The object of the present invention relates to an improvement of the above-described deposit removing apparatus, and is excellent in the deposit removing performance, and of course, the deposit removing apparatus capable of preventing slipping between the drive pulley and the belt. Is to provide.

  The sediment removing apparatus according to the present invention includes a septic tank in which septic liquid containing sedimentable substances is placed, and circulated over the inside and outside of the septic tank, and the inside of the septic tank faces the belt inner surface with the belt inner surface facing up. An endless belt having a rearward movement path that moves so as to deposit sediment, and a driving pulley whose inner surface is pressed with a predetermined tension are provided on the outer surface of the driving pulley. Protrusions extending in the axial direction are provided, and a plurality of sediment anti-slip crosspieces that can be engaged with the protrusions are provided on the inner surface of the belt at regular intervals in the belt moving direction.

  In the deposit removing apparatus according to the present invention, the slip between the drive pulley and the belt can be surely prevented by the engagement of the protrusion and the cross rail.

  Furthermore, the belt has a forward moving path in which the inner surface of the belt moves downward above the septic tank, and a sediment tray is arranged below the forward moving path. It is preferable that a removing means for removing the sediment deposited on the inner surface of the belt from the inner surface of the belt is disposed so as to drop into the sediment tray.

  The precipitate deposited on the belt contains liquid. If sediment is stored in the tray together with the liquid, the liquid may overflow from the tray. If the tray is placed on the side of the septic tank, for example, the liquid overflowing from the tray may be scattered around and contaminated with liquid, but the tray is placed above the septic tank. In this case, since the overflowing liquid is returned to the septic tank, there is no fear that the liquid is contaminated around the septic tank.

  The drive pulley is disposed above the septic tank, and the guide is slidably contacted with the inner surface of the belt along the belt moving direction above the septic tank spaced rearward from the drive pulley. The plate is arranged, and a forward movement path is formed between the guide plate and the drive pulley. When the downstream end of the guide plate in the belt moving direction reaches above the sediment tray, it is deposited on the belt. The deposited sediment is guided to the upper part of the sediment tray by the guide plate without being inadvertently dropped from the belt, and is reliably conveyed.

  Further, the first driven pulley and the second driven pulley are disposed in the septic tank with a space in the front-rear direction, and the belt is a belt on the drive pulley, the first driven pulley, the second driven pulley, and the guide plate. Wound sequentially in the moving direction, a rearward movement path is formed between the first driven pulley and the second driven pulley, the rearward movement path end and the forward movement path start end are connected by the upward movement path, When the end of the movement path and the start end of the rearward movement path are communicated by the downward movement path, they can be communicated over the entire length of the belt movement path by a smooth path with a minimum bent portion.

  According to the present invention, slip between the drive pulley and the belt can be prevented without impairing the sediment removal performance.

It is a vertical longitudinal cross-sectional view of the deposit removal apparatus by this invention. FIG. 2 is a cross-sectional view perpendicular to the line II-II in FIG. It is an enlarged view of the movable scraper of the deposit removal apparatus.

  Embodiments of the present invention will be described below with reference to the drawings.

  In the following description, the front and rear refer to the left side in FIG. 1 as the rear and the opposite side as the front, and the left and right refer to the left and right sides as viewed from the rear (left and right in FIG. 2). .

  The sediment removing device is for conveying the sediment S in the upper open box-shaped sewage tank 11 in which the sewage L containing the sedimentable substance is put, and the sewage S in the sewage tank 11 to the outside of the sewage tank 11. A conveyor 12, a movable scraper 13 for scraping the sediment S being conveyed by the conveyor 12 from the conveyor 12, and a sediment tray 14 for collecting the sediment S scraped from the conveyor 12 are provided.

  The conveyor 12 is a pair of left and right rectangular vertical plate frames 21 that are placed on the bottom wall of the septic tank 11 so as to face the left and right side walls of the septic tank 11 and protrude upward from the septic tank 11. A drive pulley 22 that is passed to the top front ends of both frames 21, and a pair of front and rear first driven pulleys 23 and 24 that are passed to the bottoms of both frames 21 at the front and rear, Side-view inverted L-shaped guide plate 25 that is passed to the top rear ends of both frames 21, and endless belts that are sequentially wound around these pulleys 22, 23, 24 and guide plate 25 in the belt moving direction. 26, and a motor 27 with a speed reducer that connects an output shaft to the left end of the drive pulley 22.

  Both frames 21 are provided with tension pulleys 28 located below the drive pulley 22.

  A tray window 31 is formed in the left frame 21 so as to be positioned at an upper level than the septic tank 11. A pair of front and rear horizontal guide rails 32 projecting rightward from both front and rear ends of the tray window 31 toward both frames 21 are provided. In both frames 21, a sewage window 33 is formed so as to cross the sewage L liquid surface vertically. An inlet pipe 34 is passed through the dirty window 33 of the left frame 21. The inlet of the inlet pipe 34 is directed downward and submerged in the filth L. An outlet pipe 35 is disposed in front of the space between the two frames 21. The outlet of the outlet pipe 35 is directed downward and submerged deeply in the sewage L. The outlet pipe 35 is provided with a circulation pump 36.

  The movable scraper 13 includes a horizontal strip plate blade 42 having a scraping blade 41 at the rear edge and extending in the left-right direction. And a pair of left and right weights 45 integrated with each arm 44 so as to urge each arm 44 in a direction to stand upright from the horizontal pin 43. ing.

  The sediment tray 14 is placed across both guide rails 32. A large number of drain holes 51 are scattered on the bottom wall of the sediment tray 14. A filter paper 52 is laid on the bottom wall of the sediment tray 14 so as to cover the drain hole 51.

  The belt 26 has an endless circulation path extending inside and outside the septic tank 11. That is, the circulation path includes a downward movement path 61 extending from the drive pulley 22 to the first driven pulley 23, a rearward movement path 62 extending from the first driven pulley 23 to the second driven pulley 24, and a guide plate from the second driven pulley 24. An upward movement path 63 extending up to 25 and a forward movement path 64 extending from the guide plate 25 to the drive pulley 22 are formed.

  The inner surface of the belt 26 is pressed against the outer surface of the drive pulley 22 from the end of the forward movement path 64 to the beginning of the downward movement path 61. From the end of the upward movement path 63 to the beginning of the forward movement path 64, the inner surface of the belt 26 is in sliding contact with the outer surface of the guide plate 25. A scraping blade 41 is brought into contact with the inner surface of the belt 26 in the course of the forward movement path 64.

  On the outer surface of the drive pulley 22, a plurality of protrusions 71 extending in the axial direction are provided at a constant pitch. A large number of crosspieces 72 are provided on the inner surface of the belt 26 at a constant pitch.

  The drive pulley 22 is driven clockwise by the motor 27 in FIG. Thereby, the belt 26 is moved. The moving speed of the belt 26 is preferably 0.5 m / min or less.

  The sludge and the like contained in the dirty liquid L is precipitated with time, and is deposited on the backward movement path 62 of the belt 26 to become the precipitate S. When reaching the upward movement path 63 from the backward movement path 62, the sediment S is concentrated and deposited on the horizontal rail 72. The sediment S is also raised along with the rise of the horizontal rail 72. During this time, the moisture contained in the sediment S flows down by its own weight and is collected in the dirty liquid tank 11. The water content of the precipitate S on the horizontal rail 72 becomes lower.

  When reaching the forward movement path 64 from the upward movement path 63, the sediment S concentrated on the horizontal rail 72 is slid on the outer surface of the guide plate 25 together with the horizontal rail 72. The slide S to be slid is guided to the immediate vicinity of the movable scraper 13 by the guide plate 25 and does not fall off the belt 26 inadvertently. The movable scraper 13 scrapes the sediment S from the belt 26 and drops and accommodates it in the sediment tray 14 by its own weight. The liquid contained in the sediment S is discharged from the sediment tray 14 through the drain hole 51 and returned to the septic tank. When liquid overflows the sediment tray 14, it is also returned to the septic tank.

When the belt 26 reaches the downward movement path 61 from the forward movement path 64, the belt 26 is moved along the outer periphery of the drive pulley 22. In this case, any one or more of the protrusions 71 of the drive pulley 22 are engaged with the cross rail 72 of the belt 26. Due to the engagement between the ridge 71 and the horizontal rail 72, the belt 26 is reliably moved according to the rotation of the drive pulley 22 without causing the inner surface of the belt 26 to slip with respect to the outer surface of the drive pulley 22.

  The deposit removing apparatus according to the present invention is suitable for achieving the removal of deposits (sediments) such as sludge from the sewage such as coolant used in machine tool grinding or the like.

11 Soil tank
22 Drive pulley
26 belt
62 Travel Route
71
72 side pier
S deposit

Claims (4)

  A sewage tank containing sewage containing sedimentable substances, and a circulatory circuit that is circulated across the inside and outside of the sewage tank and moves inside the sewage tank with the belt inner surface facing up so that sediment can be deposited on the belt inner surface. An endless belt having a rearward movement path, and a drive pulley whose inner surface is pressed with a predetermined tension, and a protrusion extending in the axial direction of the drive pulley is provided on the outer surface of the drive pulley. A deposit removing device in which a plurality of deposit slip crosspieces that can be engaged with the protrusions are provided on the inner surface of the belt at regular intervals in the belt moving direction.   The belt has a forward movement path in which the inner surface of the belt moves downward with the inner surface facing downward, and a sediment tray is disposed below the forward movement path. 2. The deposit removing device according to claim 1, wherein a removing means for removing the deposit deposited on the belt from the inner surface of the belt so as to drop into the deposit tray.   A drive pulley is disposed above the septic tank, and a guide plate is slidably contacted with the belt inner surface along the belt moving direction above the septic tank spaced rearward from the drive pulley. The sediment according to claim 2, wherein a forward movement path is formed between the guide plate and the drive pulley, and a downstream end of the guide plate in the belt moving direction reaches above the sediment tray. Removal device.   A first driven pulley and a second driven pulley are disposed in the septic tank with a space in the front-rear direction. The rearward movement path is formed between the first driven pulley and the second driven pulley, the rearward movement path terminal and the forward movement path start end are connected by the upward movement path, and the forward movement path The sediment removing device according to claim 3, wherein the terminal end and the rearward moving path start end are communicated by a downward moving path.

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