US2006825A - Grit removal apparatus - Google Patents

Grit removal apparatus Download PDF

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Publication number
US2006825A
US2006825A US387866A US38786629A US2006825A US 2006825 A US2006825 A US 2006825A US 387866 A US387866 A US 387866A US 38786629 A US38786629 A US 38786629A US 2006825 A US2006825 A US 2006825A
Authority
US
United States
Prior art keywords
carriage
grit
scraper
chamber
shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US387866A
Other languages
English (en)
Inventor
Frank A Downes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dorr Co
Original Assignee
Dorr Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to NL30744D priority Critical patent/NL30744C/xx
Application filed by Dorr Co filed Critical Dorr Co
Priority to US387866A priority patent/US2006825A/en
Priority to FR700979D priority patent/FR700979A/fr
Priority to GB25385/30A priority patent/GB364535A/en
Application granted granted Critical
Publication of US2006825A publication Critical patent/US2006825A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
    • E03F7/10—Wheeled apparatus for emptying sewers or cesspools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/02—Settling tanks with single outlets for the separated liquid
    • B01D21/04—Settling tanks with single outlets for the separated liquid with moving scrapers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/18—Construction of the scrapers or the driving mechanisms for settling tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/18—Construction of the scrapers or the driving mechanisms for settling tanks
    • B01D21/20—Driving mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/18—Construction of the scrapers or the driving mechanisms for settling tanks
    • B01D21/22—Safety mechanisms

Definitions

  • This invention relates to means for cleaning grit chambers in sewage systems and the like.
  • the broad object of this invention is to obviate the difficulties set forth by providing an arrangement applicable to the present type of elongated grit chamber which will be adapted to remove settled grit from the chamber bottom without interrupting the flow of sewage, and which may be operated as often as may be required, de-.
  • the invention contemplates the provision of a grit collecting unit traveling back and forth over the chamber and provided with a scraper adapted to convey the settled grit to an endof the chamber where suitable removal means is provided and preferably arranged sothat such scraper may be raised into inefiective position during return of the mechanism to the opposite end of the chamber.
  • a further object is to provide a scraper that is yieldably mounted so that when meeting either an abnormal accumulation of grit or an abnormal obstruction it will ride over such obstruction and will penetrate into the accumulated grit only to such a depth as is necessary to provide a maximum load, additional portions of the accumulated grit being moved at each successive reciprocation of the apparatus. Provision is likewise made for automatic electric operation of the cleaning apparatus.
  • Further objects of the invention are to provide for the general purpose specified apparatus in which the moving parts are in accessible position; apparatus in which the wearing parts are located above the liquid level in the grit chamber; apparatus such as to present minimum obstruction to the flow through the chamber; and apparatus in which the parts entering the liquid have a minimum tendency to collect waste material thereon.
  • FIG. 1 is a vertical sectional view of an illustrative embodiment of the invention, the section being taken on the line l-l of Fig. 2, and certain parts being omitted;
  • Fig. 2 is a top plan view
  • Fig. 3 is a view in front elevation of the scraper mechanism, the wall of the grit chamber being shown in section on the line 3-3 of Fig. 2.
  • I0 is a grit chamber having its bottom H below the level of the bottom P2 of the conduit l3 and having at one end a transverse depression or trough 14 serving as a pocket into which the settled material or grit is deposited by means of a scraper including a blade I 5 extending across the chamber and from which such material or grit is withdrawn by suitable means such as a conveyer l6 located therein.
  • the scraper blade I5 is suspended from a carriage H by hangers 18 which are relatively thin transversely of the chamber and therefore present less obstruction to the flow of the material than would otherwise be the case.
  • the carriage l1 includes a frame H! which is supported at the rear by means of wheels 20 on the ends of a shaft or axle 2
  • This sprocket 26 is operatively connected by means of a sprocket chain 21 with a sprocket 28 rotatably mounted on the frame l9 and connected by means of a speed reducer 29 with a reversible motor 30 also mounted on the carriage and controlled by reversing switch 32 on the carriage and connected with the motor by conducting means included in a cable 3
  • Electric power is supplied to the switch by means of conductors 33 on the carriage'and electrically connected with conducting means, including a plurality of conductors 34 arranged parallel to the path of the carriage and above the same, by pantograph trolleys including grooved wheels 35 (electrically connected with said conductors) running on said conductors 34 and held yieldably in engagement therewith by means including standards 36 projecting up-' wardly from the carriage l1, and quadrangular frames each consisting of two lower arms 31 pivoted at their lower ends to the upper end of the corresponding standard by spaced pivots 38, and two upper arms 39 pivoted at 40 at their upper ends and supporting the corresponding wheel 35 to turn about the pivotal axis of this connection. Adjacent to their lower ends these'arms 39 are connected respectively with upper and outer ends of the corresponding arms 31 by pivots 4
  • arms 39 are also continued below the pivots 4! and at the lower ends of such extensions are connected with the outer ends of helical springs 42 of which the other ends are so connected with the standard 36 by suitable means' such as pins 43, as to press the corresponding wheel 35 against the corresponding conductor 34.
  • the upper ends of the hangers 18 are pivotally connected with arms 45 fixed on and' projecting forwardly from a transverse shaft 46 rotatably mounted on the carriage frame I 9.
  • the upper ends of the hangers l8 are fixed on a shaft 41 and this shaft is rotatably mounted in theiarms 45.
  • Each arm 45 constitutes a part of a bell crank 48 having an upright arm 49 on which is mounted a weight or counterbalance 50 and the extreme or limiting positions of the bellcranks and the associated parts are determined by means including flanges 5
  • Each of the compressible links includes a forward end member 55, a bar 56 rigidly attached to said member 55 and extending rearwardly therefrom, a rearward end member 51 slidable on said bar, a helical compression spring 58 surrounding said bar and interposed between said members 55 and 51, tie rods 59 passing through flanges at the inner ends of said members 55 and 5I, and nuts 60 threaded on the ends of said tie rods and engaging the outer sides of said flanges to determine the maximum length of said link.
  • the rearward end members 51 are connected with the carriage I 9 by suitable means such as pivots SI and the forsite ends of the shaft
  • suitable means such as pivots SI and the forsite ends of the shaft
  • each bell crank 48 assumes the position indicated in dot-and-dasli lines and the scraper I5 is raised and due to the connection of the hangers with the carriage by means of the 1ongitudinally yieldable links 54, is swung forward and assumes the inclined position indicated in dot-and-dash lines at the right of Fig. 1. With the scraper blade in this position the resistance to rearward movement thereof is decreased and the blade will more easily ride over material encountered in its rearward stroke.
  • the reversing switch 32 is provided with a. suitable operating arm 65 which is so connected, as by means of a-link 66, with an arm 61 fixed on the rock shaft 46, so that rocking of the shaft in one direction will cause the scraper blade to assume its effective position and the motor to be' actuated to advance the blade toward the'pocket l4, and rocking of the shaft in the opposite direction will serve to raise the blade to ineffective position and to actuate the motor to withdraw the scraper blade from the pocket end of the grit chamber.
  • Automatic actuation of the rock shaft when the carriage reaches the end of its travel may be effected by suitable means such as stops 58 arranged at suitable positions adjacent to the rails 22 and at each end of-the path of travel of the carriage, and arms 69 mounted on oppo- 46 and provided with wheels Hi rotatably mounted thereon in position to engage the upright edges II of said stops.
  • suitable means such as stops 58 arranged at suitable positions adjacent to the rails 22 and at each end of-the path of travel of the carriage, and arms 69 mounted on oppo- 46 and provided with wheels Hi rotatably mounted thereon in position to engage the upright edges II of said stops.
  • carriage-actuating means including a reversible'motor mounted on the carriage, a reversing switch on said carriage and connected I with said motor, means for elevating said scraper, and common controlling means for said switch and such elevating means.
  • a settling device the combination of a tank, scraper means in said tank, means for moving the scraper over the bottom of the tank in one direction, leverage mechanism operative when the scraper is moved in the opposite direction for raising the scraper away from the bottom of the tank, and means for removing the settled and scraped substances from the tank.
  • a clarifier for sewage and the like comprising a tank, a carriage movable thereover, sludge scraping means carried by the carriage for scraping sludge from the bottom of the tank, said scraper means being relatively displaceable from a scraping position to a non-scraping position,
  • a clarifier for sewage and the like comprising a tank, a carriage movable thereover, sludge scraping means carried by the carriage for scraping sludge from the bottom of the tank and including a blade movable into and out of sludge scraping position, means for moving the carriage alternately in opposite directions over the tank, means for positioning the sludge scraping means in operative and inoperative positions, and stationary means rendered operative by the movement of the carriage for controlling the positioning of said blade.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Removal Of Floating Material (AREA)
  • Treatment Of Sludge (AREA)
US387866A 1929-08-23 1929-08-23 Grit removal apparatus Expired - Lifetime US2006825A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL30744D NL30744C (zh) 1929-08-23
US387866A US2006825A (en) 1929-08-23 1929-08-23 Grit removal apparatus
FR700979D FR700979A (fr) 1929-08-23 1930-08-22 Dispositif de nettoyage des chambres à sable des égouts
GB25385/30A GB364535A (en) 1929-08-23 1930-08-25 Improvement in scraper mechanism for sedimentation tanks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US387866A US2006825A (en) 1929-08-23 1929-08-23 Grit removal apparatus

Publications (1)

Publication Number Publication Date
US2006825A true US2006825A (en) 1935-07-02

Family

ID=23531642

Family Applications (1)

Application Number Title Priority Date Filing Date
US387866A Expired - Lifetime US2006825A (en) 1929-08-23 1929-08-23 Grit removal apparatus

Country Status (4)

Country Link
US (1) US2006825A (zh)
FR (1) FR700979A (zh)
GB (1) GB364535A (zh)
NL (1) NL30744C (zh)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3410412A (en) * 1965-12-23 1968-11-12 Passavant Werke Sludge scraper mechanism
US3868323A (en) * 1972-09-06 1975-02-25 Prometall Uznach Ag Apparatus for removal of settled or strained solids from surrounding liquid
US4017402A (en) * 1974-08-12 1977-04-12 Dorr-Oliver Incorporated Sedimentation tank having a rotary rake structure
US4417983A (en) * 1980-03-26 1983-11-29 Passavant-Werke Ag & Co. Kg Scraper apparatus for settling basins and the like
US5051180A (en) * 1988-05-10 1991-09-24 Sheppard Ingot Castings Machines Limited Device for removing material from the free surface of a body of liquid using unequal length linkages
US5431818A (en) * 1991-08-13 1995-07-11 K Z Handels Aktiebolag Transporting element of a reciprocable scraper for moving sludge in settling basins and similar objects at water purification plants
US6547964B1 (en) 1999-09-08 2003-04-15 Robert C. Rajewski Mud tank cleaning system
US6607666B2 (en) * 2001-07-06 2003-08-19 Robert C. Rajewski Mud tank cleaning system
US20070084638A1 (en) * 2005-10-19 2007-04-19 Clyde Bohnsack Drilling fluid flow facilitation
US10119245B2 (en) 2015-08-25 2018-11-06 Kaiser Premier Llc Vacuum unit and truck with air and water
CN114191858A (zh) * 2021-12-02 2022-03-18 布赫 一种污水处理沉淀池用刮泥装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1179160B (de) * 1962-05-28 1964-10-01 Passavant Werke Schlammraeumer fuer Absetzbecken
CN111151036B (zh) * 2020-03-17 2021-08-06 杭州富阳伟文环保科技有限公司 一种污水处理沉淀刮除机构及其方法

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3410412A (en) * 1965-12-23 1968-11-12 Passavant Werke Sludge scraper mechanism
US3868323A (en) * 1972-09-06 1975-02-25 Prometall Uznach Ag Apparatus for removal of settled or strained solids from surrounding liquid
US4017402A (en) * 1974-08-12 1977-04-12 Dorr-Oliver Incorporated Sedimentation tank having a rotary rake structure
US4417983A (en) * 1980-03-26 1983-11-29 Passavant-Werke Ag & Co. Kg Scraper apparatus for settling basins and the like
US5051180A (en) * 1988-05-10 1991-09-24 Sheppard Ingot Castings Machines Limited Device for removing material from the free surface of a body of liquid using unequal length linkages
US5431818A (en) * 1991-08-13 1995-07-11 K Z Handels Aktiebolag Transporting element of a reciprocable scraper for moving sludge in settling basins and similar objects at water purification plants
US6547964B1 (en) 1999-09-08 2003-04-15 Robert C. Rajewski Mud tank cleaning system
US6607666B2 (en) * 2001-07-06 2003-08-19 Robert C. Rajewski Mud tank cleaning system
US20070084638A1 (en) * 2005-10-19 2007-04-19 Clyde Bohnsack Drilling fluid flow facilitation
US20090020336A1 (en) * 2005-10-19 2009-01-22 Clyde Bohnsack Drilling fluid flow facilitation
US10119245B2 (en) 2015-08-25 2018-11-06 Kaiser Premier Llc Vacuum unit and truck with air and water
US10920397B2 (en) 2015-08-25 2021-02-16 Kaiser Premier Llc Nozzle and vacuum unit with air and water
CN114191858A (zh) * 2021-12-02 2022-03-18 布赫 一种污水处理沉淀池用刮泥装置

Also Published As

Publication number Publication date
GB364535A (en) 1931-12-28
FR700979A (fr) 1931-03-10
NL30744C (zh)

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