US3680842A - Variable amplitude vibrator, for example for the manufacture of moulded concrete products - Google Patents

Variable amplitude vibrator, for example for the manufacture of moulded concrete products Download PDF

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Publication number
US3680842A
US3680842A US92478A US3680842DA US3680842A US 3680842 A US3680842 A US 3680842A US 92478 A US92478 A US 92478A US 3680842D A US3680842D A US 3680842DA US 3680842 A US3680842 A US 3680842A
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US
United States
Prior art keywords
fluid
chamber
vibrator
vibrator according
support
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
US92478A
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English (en)
Inventor
Virginio Sironi
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.)
VIBRATECHNIQUES
Honeywell UOP LLC
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VIBRATECHNIQUES
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Assigned to UOP, A GENERAL PARTNERSHIP OF NY reassignment UOP, A GENERAL PARTNERSHIP OF NY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: UOP INC.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
    • B28B1/087—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould
    • B28B1/0873—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould the mould being placed on vibrating or jolting supports, e.g. moulding tables

Definitions

  • a vibrator e.g., for the manufacture of moulded concrete products, comprises a support for a mass to be vibrated, and means for vibrating the support, said means including a chamber adapted to contain a liquid through which in operation vibrations are transmitted to the support, a further chamber adapted to contain liquid under pressure and an adjustable flow restrictor connecting the first-mentioned chamber with the further chamber.
  • the invention provides a vibrator comprising a sup port for a mass to be vibrated, and means for vibrating thesupport, said means including a chamber adapted to contain a liquid through which in operation vibrations are transmitted to the support, the chamber communicating via an adjustable flow restrictor with a further chamber adapted to contain liquid under pressure.
  • the first-mentioned chamber may be bounded by a flexible diaphragm which is connected to the support to transmit vibrations thereto from the liquid.
  • the vibrator installation illustrated is used for vibrating a mass of concrete (not shown). It comprises a cylindrical vessel 1 having a vertical axis, the bottom 2 of which rests on a base 3 and also serves as bottom for a coaxial internal cylinder 4, in which a guide piston 5 is adapted to move.
  • An annular chamber 6 is thus provided between the cylinder 4 and the inside walls of the vessel 1.
  • This chamber which in operation is entirely filled with oil, is provided at its top with a movable closure wall constituted in this embodiment by a flexible annular diaphragm 7.
  • this diaphragm is gripped sealingly in a groove 8 in the top edge of the vessel 1, and in its central portion it is gripped, likewise sealingly, in a groove 9 formed in a thickened portion 10 of the top of the cylinder 4.
  • pressurizing the further the means for cyclically introducing oil into the chamber is constituted in known manner by a piston 14 adapted to move in the cylinder 15 in communication with the chamber 6.
  • This piston is driven in a reciprocating movement by a connecting rod 16 connected to a rotating driving pulley l7 driven rotationally by a motor 18 and a belt 19.
  • the big end 20 of the connecting rod can be fixed to the pulley 17 at various points spaced radially apart on the latter, with the aid of a radial slot 21 provided in the pulley.
  • the vibrator is capable of operating at frequencies below the audible range. Also, since the liquid in the chamber 6 is incompressible, the vibrations produced have a constant amplitude which is independent of the load placed on the support 13; this amplitude in fact depends only on the volume of liquid pushed by the piston 14 into the chamber in each cycle.
  • the chamber 6 is in addition in communication through a pipe 22, provided with an adjustable loss of head device or flow restrictor 23, with an oil container 24 constituting a further chamber.
  • the top portion of said container is in communication through a pipe 25 with a compressed air cylinder 26 provided with a pressure reduction valve 27.
  • the position of rest of the movable wall 7 bounding the chamber also is adjustable.
  • position of rest we mean the position which it occupies when the piston is stopped at mid-stroke. This is particularly advantag'eous when as in this case the movable wall 7 is constituted'by a flexible diaphragm.
  • the diaphragm 7 should not be deformed when in its rest position.
  • the rest position of the diaphragm is adjusted by adjusting the pressure of the gas in the container 24 by means of the valve 27, according to the load on the support 13.
  • Adjusting the pressure causes liquid to pass between the chamber 6 and the container 24 or vice versa. Adjusting the quantity of fluid in the chamber 6 raises or lowers the diaphragm 7 thus permitting it to be brought into an undeformed shape when it is in its rest position.
  • the vibrator is operated as follows.
  • the motor 18 being at rest, a mass of concrete to be vibrated is placed on the movable support 13.
  • the pressure reduction valve 27 of the cylinder is then adjusted so that when the piston 14 is at mid-stroke the diaphragm 7 will be perfectly horizontal and undeformed.
  • the motor 18 is started the amplitude of vibration of the support 13 is adjusted by adjusting the flow restrictor 23. If the amplitude of the vibrations is too low, it is necessary to increase the loss of head in the restrictor 23.
  • Adjustment of the restrictor 23 provides accurate control of the vibrator amplitude. Choice of different ranges of amplitude is effected by preadjustment of the radius of rotation of the connecting rod big end 20 by fixing the big end at a predetermined point in the aperture 21, thereby adjusting the stroke of the piston 14.
  • a vibrator having support means for a mass which is to be vibrated and vibrating means interconnected to said support means for vibrating same, said vibrating means comprising:
  • first wall means defining a primary chamber adapted to contain a substantially incompressible fluid therein;
  • said first wall means including a movable wall portion defining a part of said primary chamber and adapted for engagement with the fluid in said primary chamber, said movable wall portionbeing engaged with said support means;
  • second wall means defining a secondary chamber adapted to contain said substantially incompressible fluid therein;
  • adjustable flow restricting means associated with said passageway for controlling the flow therethrough, whereby the vibrations transmitted through the fluid to the support means can be selectively varied relative to the vibrations imposed on the fluid by the input means.
  • a vibrator according to .claim 1 wherein said substantially incompressible fluid occupies only a portion of said secondary chamber, and means associated with said secondary chamber for supplying a pressurized compressible gas thereto whereby said pressurized compressible gas occupies the remainder of said secondary chamber.
  • a vibrator according to claim 2 further including adjustment means for permitting the pressure of the compressible gas as contained in said secondary chamber to be selectively varied.
  • said input means includes a reciprocal piston member, said piston member comprising a part of the external periphery of said primary chamber, and said input means including drive means connected to said piston means for reciprocating same for causing cyclic displacement of the fluid within said primary chamber.
  • a vibrator according to claim 1, wherein said flow restricting means comprises an adjustable device as sociated with said flow passageway for permitting the flow area to be selectively varied.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Combined Devices Of Dampers And Springs (AREA)
  • Reciprocating Pumps (AREA)
  • Vibration Prevention Devices (AREA)
US92478A 1969-11-24 1970-11-24 Variable amplitude vibrator, for example for the manufacture of moulded concrete products Expired - Lifetime US3680842A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6940324A FR2067955A5 (enrdf_load_stackoverflow) 1969-11-24 1969-11-24

Publications (1)

Publication Number Publication Date
US3680842A true US3680842A (en) 1972-08-01

Family

ID=9043495

Family Applications (1)

Application Number Title Priority Date Filing Date
US92478A Expired - Lifetime US3680842A (en) 1969-11-24 1970-11-24 Variable amplitude vibrator, for example for the manufacture of moulded concrete products

Country Status (9)

Country Link
US (1) US3680842A (enrdf_load_stackoverflow)
CA (1) CA967334A (enrdf_load_stackoverflow)
CH (1) CH525721A (enrdf_load_stackoverflow)
DE (1) DE2057132A1 (enrdf_load_stackoverflow)
ES (1) ES385837A1 (enrdf_load_stackoverflow)
FR (1) FR2067955A5 (enrdf_load_stackoverflow)
GB (1) GB1269469A (enrdf_load_stackoverflow)
NL (1) NL7017138A (enrdf_load_stackoverflow)
SE (1) SE348674B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4490045A (en) * 1981-01-19 1984-12-25 Ingrid Hudelmaier Concrete mixer
US10029390B2 (en) * 2014-06-09 2018-07-24 Elematic Oyj Method and apparatus for casting concrete products
CN110696146A (zh) * 2019-12-13 2020-01-17 湖南三一快而居住宅工业有限公司 一种振动台和振捣方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006018810A1 (de) * 2006-04-22 2007-10-25 Kobra Formen Gmbh Vorrichtung zur Herstellung von Betonformsteinen mit einer Rütteleinrichtung und Aktuator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1017685A (en) * 1909-09-29 1912-02-20 Edgar H Mumford Jolt-ramming apparatus.
US3151958A (en) * 1957-08-26 1964-10-06 Albert G Bodine Pressurized degasification of crude oil by sonic wave action
US3544074A (en) * 1967-06-30 1970-12-01 Susanna Mikhailovna Karpacheva Pneumatic pulsation for imparting vibratory motion to a liquid in a container

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1017685A (en) * 1909-09-29 1912-02-20 Edgar H Mumford Jolt-ramming apparatus.
US3151958A (en) * 1957-08-26 1964-10-06 Albert G Bodine Pressurized degasification of crude oil by sonic wave action
US3544074A (en) * 1967-06-30 1970-12-01 Susanna Mikhailovna Karpacheva Pneumatic pulsation for imparting vibratory motion to a liquid in a container

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4490045A (en) * 1981-01-19 1984-12-25 Ingrid Hudelmaier Concrete mixer
US10029390B2 (en) * 2014-06-09 2018-07-24 Elematic Oyj Method and apparatus for casting concrete products
CN110696146A (zh) * 2019-12-13 2020-01-17 湖南三一快而居住宅工业有限公司 一种振动台和振捣方法
CN110696146B (zh) * 2019-12-13 2020-03-27 湖南三一快而居住宅工业有限公司 一种振动台和振捣方法

Also Published As

Publication number Publication date
ES385837A1 (es) 1973-05-01
FR2067955A5 (enrdf_load_stackoverflow) 1971-08-20
CH525721A (fr) 1972-07-31
DE2057132A1 (de) 1971-05-27
CA967334A (en) 1975-05-13
SE348674B (enrdf_load_stackoverflow) 1972-09-11
NL7017138A (enrdf_load_stackoverflow) 1971-05-26
GB1269469A (en) 1972-04-06

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Owner name: UOP, A GENERAL PARTNERSHIP OF NY, ILLINOIS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:UOP INC.;REEL/FRAME:005077/0005

Effective date: 19880822