US3922146A - Stirrer and cover for stirring corrosive charges - Google Patents

Stirrer and cover for stirring corrosive charges Download PDF

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Publication number
US3922146A
US3922146A US333002A US33300273A US3922146A US 3922146 A US3922146 A US 3922146A US 333002 A US333002 A US 333002A US 33300273 A US33300273 A US 33300273A US 3922146 A US3922146 A US 3922146A
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US
United States
Prior art keywords
stirring
stirring shaft
stirrer
cover
corrosive
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
US333002A
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English (en)
Inventor
Dieter Kupka
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3922146A publication Critical patent/US3922146A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/051—Stirrers characterised by their elements, materials or mechanical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/051—Stirrers characterised by their elements, materials or mechanical properties
    • B01F27/053—Stirrers characterised by their elements, materials or mechanical properties characterised by their materials
    • B01F27/0531—Stirrers characterised by their elements, materials or mechanical properties characterised by their materials with particular surface characteristics, e.g. coated or rough

Definitions

  • PTFE polystyrene foam
  • the plastic cover can be configured into any desired shape, and particularly into those shapes which are effective for desirable flow and stirring characteristics.
  • the need for enameling in order to shape the stirring elements is eliminated.
  • the advantageous characteristics of PTFE are particularly realized when used to fabricate the plastic cover.
  • PTFE contracts and expands in dependence upon temperature fluctuations, and it does so by much greater amounts than metals, and therefore also by a much greater amount than a metal such as steel, which is used for the stirring shafts for which the plastic-covering is to be used.
  • FIG. 1 illustrates in elevation a partial cross-sectional view of a stirrer according to the present invention, with the outside ends of the stirring arms cut away;
  • the stirring element 1 with its hub 4 is attached to the lower end of a stirring shaft 7 in a manner which will be explained in more detail in the following paragraphs.
  • the stirring shaft 7 is developed as a hollow shaft and is made of a metal, such as steel, preferably high grade steel.
  • the shaft 7 comprises an upper portion 7, an intermediate metallic weld member 24 and an end seal 25.
  • the lower end of the upper portion 7' has defined therein a recess 7" and the upper end of the end seal 25 has defined therein a recess 25.
  • Both these recesses provide mounting areas for receiving respective ends of the weld member 24 for welding to the upper portion 7' and the end seal 25, respectively.
  • Both the upper portion 7 and the end seal 25 are provided with shoulders which form a limit to the recesses 7" and 25, respectively, on one end, and define frusto-conical surfaces 22 and 19, respectively.
  • the end seal is also provided with a torque transmitting extension 8 which has a square configuration.
  • the hub 4 defines a bore which is configured to have a first portion 4 which defines a conical surface 4", a second portion 5 in the form of a square recess and a third portion 6 in the form of a cylindrical counterbore which defines an abutment surface 17.
  • the cover 18 is a prefabricated, specially constructed element, that is, an element which is extruded in pipe form of PTFE.
  • the upper end of the cover 18 is pressed tightly against the conical surface 22 by means of a screw cap 21, which is provided with a surface 21' and screw threads 20 for this purpose.
  • the screw cap 21 is screwed onto the upper portion 7 of the stirring shaft 7.
  • the lower end of the cover 18 is pressed tightly against the conical surface 4" of the hub portion 4', which generally corresponds to the surface 19. In the area between its tightly attached ends, that is, in area A, the cover 18 may be shrunk on.
  • a stirrer for stirring corrosive charges in corrosion resistant, high pressure reaction tanks, such as glass-lined tanks, the stirrer including a metallic stirring shaft having a frusto-conical portion and a plastic stirring element attached to one end of the stirring shaft, the stirring element being fabricated as a one-piece element having a plurality of arms, the improvement comprising: a plastic cover covering a portion of the stirring shaft which contacts the corrosive charge, said cover having two end portions with one end portion being sealingly secured to the stirring element and the other end portion being sealingly secured to the stirring shaft; a screw cap which threadedly engages said stirring shaft, said screw cap having a surface which is generally parellel to the outer surface of said frusto-conical portion, said threaded engagement being such that said one end portion of said cover can be received and secured between said surfacesv 4.
  • a stirrer as defined in claim 11, wherein said holding mechanism comprises: a mounting plate having a central threaded bore within which said tie rod is threadedly received and a plurality of bolt receiving bores, said plate being adapted for reception within said second bore portion; and a plurality of adjustable abutment-elements, each being rotatably mounted by a bolt to said plate at a respective one of said bolt receiving bores, and each being positioned relative to said 8 plate so that said plate can be received into said second bore portion and thereafter each is positioned within said third bore portion and in engagement with said abutment surface.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Accessories For Mixers (AREA)
US333002A 1972-02-16 1973-02-16 Stirrer and cover for stirring corrosive charges Expired - Lifetime US3922146A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722207207 DE2207207B2 (de) 1972-02-16 1972-02-16 Ruehrer

Publications (1)

Publication Number Publication Date
US3922146A true US3922146A (en) 1975-11-25

Family

ID=5836094

Family Applications (1)

Application Number Title Priority Date Filing Date
US333002A Expired - Lifetime US3922146A (en) 1972-02-16 1973-02-16 Stirrer and cover for stirring corrosive charges

Country Status (7)

Country Link
US (1) US3922146A (enrdf_load_stackoverflow)
JP (1) JPS4889449A (enrdf_load_stackoverflow)
CH (1) CH541350A (enrdf_load_stackoverflow)
DD (1) DD103818A5 (enrdf_load_stackoverflow)
DE (1) DE2207207B2 (enrdf_load_stackoverflow)
FR (1) FR2172083B1 (enrdf_load_stackoverflow)
GB (1) GB1397457A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4575253A (en) * 1982-11-26 1986-03-11 Dipl. Ing. H. List, Industrielle Verfahrenstechnik Stirring apparatus
US20050031522A1 (en) * 2001-10-23 2005-02-10 Ac Capital Management, Inc. Integrated oxygen generation and carbon dioxide absorption method apparatus and systems
CN108479509A (zh) * 2018-05-07 2018-09-04 张家港市天源制漆涂装有限公司 一种便携式防腐抗菌水性涂料搅拌设备
US11311847B2 (en) * 2018-05-16 2022-04-26 Pfaudier US, Inc. Composite agitator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2619134C2 (de) * 1976-04-30 1985-10-24 Lenser Kunststoff-Presswerk Gmbh + Co Kg, 7913 Senden Rührwerkpropeller

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2958517A (en) * 1958-04-28 1960-11-01 Bellco Glass Inc Vessel for tissue culture and the like comprising a magnetic stirrer
US3246882A (en) * 1963-02-22 1966-04-19 Carves Simon Ltd Apparatus for the aeration of liquids
US3622129A (en) * 1969-05-14 1971-11-23 Bellco Glass Inc Magnetic stirrer apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2958517A (en) * 1958-04-28 1960-11-01 Bellco Glass Inc Vessel for tissue culture and the like comprising a magnetic stirrer
US3246882A (en) * 1963-02-22 1966-04-19 Carves Simon Ltd Apparatus for the aeration of liquids
US3622129A (en) * 1969-05-14 1971-11-23 Bellco Glass Inc Magnetic stirrer apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4575253A (en) * 1982-11-26 1986-03-11 Dipl. Ing. H. List, Industrielle Verfahrenstechnik Stirring apparatus
US20050031522A1 (en) * 2001-10-23 2005-02-10 Ac Capital Management, Inc. Integrated oxygen generation and carbon dioxide absorption method apparatus and systems
US7427449B2 (en) * 2001-10-23 2008-09-23 General Dynamics Information Technology, Inc. Integrated oxygen generation and carbon dioxide absorption method apparatus and systems
CN108479509A (zh) * 2018-05-07 2018-09-04 张家港市天源制漆涂装有限公司 一种便携式防腐抗菌水性涂料搅拌设备
CN108479509B (zh) * 2018-05-07 2023-12-08 张家港市天源制漆涂装有限公司 一种便携式防腐抗菌水性涂料搅拌设备
US11311847B2 (en) * 2018-05-16 2022-04-26 Pfaudier US, Inc. Composite agitator

Also Published As

Publication number Publication date
FR2172083B1 (enrdf_load_stackoverflow) 1976-04-23
JPS4889449A (enrdf_load_stackoverflow) 1973-11-22
FR2172083A1 (enrdf_load_stackoverflow) 1973-09-28
DD103818A5 (enrdf_load_stackoverflow) 1974-02-12
CH541350A (de) 1973-09-15
DE2207207A1 (de) 1973-08-30
DE2207207B2 (de) 1976-10-07
GB1397457A (en) 1975-06-11

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