EP1649121A1 - Innenrüttelvorrichtung mit befreiungseinrichtung - Google Patents
Innenrüttelvorrichtung mit befreiungseinrichtungInfo
- Publication number
- EP1649121A1 EP1649121A1 EP04740935A EP04740935A EP1649121A1 EP 1649121 A1 EP1649121 A1 EP 1649121A1 EP 04740935 A EP04740935 A EP 04740935A EP 04740935 A EP04740935 A EP 04740935A EP 1649121 A1 EP1649121 A1 EP 1649121A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electric motor
- rotation
- operating state
- vibrating
- internal
- 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.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/06—Solidifying concrete, e.g. by application of vacuum before hardening
- E04G21/08—Internal vibrators, e.g. needle vibrators
Definitions
- the invention relates to an internal vibrating device according to the preamble of independent claim 1 and a method for releasing a clamped internal vibrating device according to the preamble of independent claim 11.
- Internal vibrators also referred to as internal vibrators or internal vibrators, are generally known and are used for compacting liquid concrete.
- a vibrating bottle is attached to the end of a longer or shorter hose - corresponding to a hose or rod vibrator - in which an electric motor and an unbalanced mass or unbalance device driven by it are accommodated.
- the unbalanced mass rotating at very high speed generates a vibration which is matched to the concrete to be compacted and which is transferred to the fresh concrete after immersion of the vibrating bottle, thereby eliminating air pockets and the associated pore formation and thus increasing the bulk density of the concrete, so that the desired quality and strength can be achieved.
- Devices of this type have proven themselves extremely well in practice.
- the vibrating bottle or the hose of the internal vibrator can e.g. B. jam or get stuck in the reinforcement.
- the jam can often not be released by the operator of the internal vibrator, which is why in practice the operator occasionally has to cut off the inner vibrator hose and leave the vibrating bottle in the concrete.
- the jamming of the vibrating bottle or the hose happens z. B. by the fact that the vibrator or the vibrating bottle dips sideways when immersed in the concrete and becomes entangled. Pulling attempts by the operator to save the vibrator then result in the vibrator becoming jammed in the reinforcement and no longer being able to be pulled out of the concrete. Cutting off the vibrating bottle leads to high costs, since the cut off vibrating bottle must be replaced again. In addition, the cut-off vibrating bottles remain undesirable in the concrete for reasons of stability.
- the object of the invention is to apply an internal vibrating device admit to assist the operator in loosening a jam and a method for releasing a jammed internal vibrator.
- Claim 1 and solved by a method according to claim 11.
- Preferred embodiments are defined, inter alia, in dependent claims and / or are explained in the further description.
- an internal vibrating device with an electric motor, a vibrating housing, an unbalance device arranged in the vibrating housing and rotatably driven by the electric motor, and with a main switch for switching the electric motor on and off is specified.
- the electric motor can be operated in a normal operating state with suitable turning behavior for compacting liquid concrete.
- Rotational behavior of the electric motor in the normal operating state is characterized by a certain speed and direction of rotation of the electric motor, as are generally used for compacting liquid concrete.
- the start-up phase i.e. H.
- the change in the speed of the motor of the electric motor when switching on is therefore not to be regarded as a normal operating state.
- the internal vibrating device according to the invention comprises an operating state changing device by means of which the internal vibrating device can be operated in a release operating state in which the rotating behavior of the electric motor deviates from the rotating behavior in the normal operating state.
- One aspect of the invention is therefore to change the turning behavior of the electric motor compared to the turning behavior in the normal operating state, whereby above all the following two alternative or complementary effects are achieved.
- a jerk or impact moment is caused by a
- the rotational behavior of the electric motor comprises at least one of the following parameters: direction of rotation, speed, change in speed over time and change in direction of rotation over time.
- Several of these parameters can also be changed in a suitable manner in a combined manner, so that the greatest possible change in the amplitude of the vibration of the vibrating bottle results, which can be freed from the jamming.
- a counter-torque arises from driving the unbalance device, which is transferred to the vibrating bottle, which also contributes to the liberation of the vibrating bottle.
- the direction of rotation of the electric motor is preferably reversible with respect to the direction of rotation in the normal operating state by means of the operating state changing device.
- the operating state change device can have a direction of rotation switch, by means of which the direction of rotation of the electric motor can be predetermined. This means that an operator can switch between different directions of rotation of the electric motor with this switch and thus free the vibrating bottle.
- the internal vibrating device can be operated by means of the operating state change device in an automatic direction of rotation change mode in which the direction of rotation of the electric motor changes automatically. In this case, the direction of rotation does not have to be changed manually by an operator.
- the direction of rotation of the electric motor can be reversed at periodic time intervals by means of the operating state changing device.
- suitable vibration changes and vibration states of the vibrating bottle can be achieved in order to free the vibrating bottle. witness.
- the operation of the electric motor can be interrupted at periodic time intervals by means of the operating state changing device.
- a clock generator can be used, which leads to the periodic interruption of the operation of the electric motor, as a result of which suitable vibrational changes in the vibrating bottle can be generated for liberation.
- the torque jerk when switching on and off also helps to loosen the vibrating bottle.
- the time period of the periodic time intervals may be predefinable or variable. For example, it is possible that the period in which the electric motor is operated in a certain direction of rotation is initially selected to be relatively long and is shortened over a longer period of time. This results in very different vibration changes and vibration states of the vibrating bottle, which leads to liberation of the vibrating bottle.
- the speed of the electric motor can be changed or controlled by means of the operating state change device.
- the speed of the electric motor By setting the speed of the electric motor to a specific value, a specific vibration property or a specific vibration behavior of the vibrating bottle can be specifically generated, so that the vibrating bottle can be released.
- the speed change takes place automatically, i. That is, the speed is initially selected to be low and is continuously increased, so that as many different as possible
- Vibration states of the vibrating bottle are generated and the vibrating bottle can be released.
- a vibrating device which comprises the vibrating housing, the electric motor and the unbalance device, can be driven through by changing the speed of the electric motor due to its natural frequency. That means the speed of the motor or the excitation speed is changed in such a way that the vibration frequency of the vibrating device corresponds to the natural frequency of the vibrating device or is very close to it for a certain period of time, so that there is sufficient vibration to free the jammed vibrating bottle and / or the jammed hose.
- the natural frequency of the vibrating device there is an increase in amplitude, which, together with the support of the vibrating stator against the shaft of the vibrator, leads to the release of the vibrator or the vibrating bottle from the jam.
- an unbalance device in the vibrating housing is driven by the electric motor and the electric motor is operated in the normal operating state with a rotational behavior for compacting liquid concrete.
- the electric motor is operated in a release operating state in which the rotational behavior of the electric motor deviates from the rotational behavior in the normal operating state.
- Reversing the direction of rotation of the electric motor specifying the direction of rotation of the electric motor,. automatically changing the direction of rotation of the electric motor, reversing the direction of rotation of the electric motor at periodic intervals, interrupting the direction of rotation of the electric motor at periodic intervals, _ changing the speed of the electric motor.
- a vibrating device which comprises the electric motor, the vibrating housing and the unbalance device, is advantageously driven through by changing the speed of the electric motor through its natural frequency.
- the hose is often twisted. Since the hose is usually made of an elastic material, for example rubber, there is a spring effect, ie the vibrating bottle is supported against the reinforcement in which it is clamped and is thus held in the clamped position. By means of a suitable counter-torque, which is generated according to the invention, the hose can be rotated further against the spring action and thus freed. The clamping force is overcome by a jerk effect in the circumferential direction of the vibrating bottle which is produced according to the invention.
- FIG. 1 shows a longitudinal section through a vibrating bottle of an internal vibrating device according to the invention.
- FIG. 2 shows an internal vibrating device according to the invention with a control panel
- Fig. 3 diagrams that illustrate the inventive changing the rotational behavior of the electric motor.
- the vibrating bottle 1 shows a vibrating bottle 1 known per se, in which an electric motor 2 drives a first unbalanced mass 3.
- the unbalanced mass 3 forms an unbalance, which causes the vibrating bottle 1 to vibrate.
- the electric motor drives the first mass element 3 at, for example, 12,000 revolutions per minute, as a result of which the vibrating bottle 1 is set into oscillation with approximately the same oscillation frequency.
- the oscillation frequency in the normal operating state can be different, but it is selected so that the liquid concrete is compacted as effectively as possible.
- Fig. 2 shows schematically the entire internal vibrating device, in which the vibrating bottle 1 with a protective and operating hose 5
- Switch housing 6-1 is connected.
- a main switch 7 is provided on this switch housing 6-1 on a control panel 6-2, through which the standard switch 7 Painting operating state of the electric motor 2 can be switched on.
- a direction of rotation switch 8 is provided, by means of which the direction of rotation of the electric motor 2 in the vibrating bottle 1 can be reversed or predetermined.
- the operator can reverse the direction of rotation of the electric motor 2 via the direction of rotation switch 8. This results on the one hand in a turning jerk and on the other hand a change in the vibration behavior of the vibrating bottle 1 and the hose 5, as a result of which the vibrating bottle 1 and / or the hose 5 can be released from the jamming. Reversing the direction of rotation also results in a torque which is generated by the electric motor 2 and the first mass element 3, so that a corresponding counter torque is transmitted to the vibrating bottle 1 and the hose 5. This also leads to the
- An automatic mode switch 9 for switching on an automatic release mode is also provided on the control panel 6-2. If the automatic release mode is switched on via the automatic mode switch 9, the direction of rotation of the electric motor changes automatically at periodic intervals.
- the duration of the periodic time intervals can be specified using a period duration selector switch 10.
- Rotation behavior can be changed in the normal operating state.
- a frequency converter for generating a suitable current for the electric motor 2 can also be provided, such as . B. from DE 92 17 854.5 Ul known.
- 3A shows a diagram which shows the automatic reversal of the rotational Direction in the automatic exemption mode clarified.
- the period of a periodic time interval was set, for example, to 0.5 seconds via the period duration selector switch 10. That means the direction of rotation changes every 0.5 seconds. It is also possible that the direction of rotation is reversed without a time delay, ie the motor runs alternately with a direction of rotation and the opposite direction of rotation for a certain period of time.
- the duration can be specified.
- the operation can also be carried out periodically
- Intervals are interrupted, and the duration of a periodic interval can also be specified using the period duration selection switch 10.
- 3B shows a diagram in which the turning operation is periodically interrupted at periodic time intervals of 0.5 seconds.
- period of a periodic time interval is also possible for the period of a periodic time interval to be varied automatically in the automatic liberation mode. This is possible both when reversing the direction of rotation and when interrupting the rotating operation of the electric motor.
- 3C shows a diagram in which the rotating operation is interrupted at certain time intervals, the duration of the operation and the interruption of the operation being continuously shortened.
- 3D shows a diagram in which the speed is continuously increased.
- the speed of the motor is increased linearly in time from zero to its maximum speed Djviax within 10 seconds.
- the speed of rotation reaches a value DE at a specific point in time tE at which the vibrating device vibrates at its natural frequency, ie the natural frequency of the vibrating device is passed through.
- Further changes in the rotational behavior of the electric motor are conceivable.
- the speed cannot be increased linearly with time, but by other time-speed functions, for example staircase or exponential functions.
- the electric motor 2 in the embodiment according to FIG. 1 is arranged in the vibrating bottle 1.
- the invention can also be used if the electric motor 2 is provided outside the vibrating bottle 1, for example in an external housing.
- the unbalanced mass 3 is driven, for example, via a flexible shaft which is provided in the hose 5.
- the rotational behavior of the electric motor 2 is changed according to the invention as described above.
- the vibrating device defined above comprises the vibrating bottle 1 and the unbalanced mass 3. This means that the natural frequency of this vibrating device is passed through, which under certain circumstances takes on a different value than in the embodiment described above, since the electric motor 2 in this embodiment is provided outside of the vibrating bottle 1.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Centrifugal Separators (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10333555A DE10333555B4 (de) | 2003-07-23 | 2003-07-23 | Innenrüttelvorrichtung mit Befreiungseinrichtung |
PCT/EP2004/007683 WO2005012669A1 (de) | 2003-07-23 | 2004-07-12 | Innenrüttelvorrichtung mit befreiungseinrichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1649121A1 true EP1649121A1 (de) | 2006-04-26 |
EP1649121B1 EP1649121B1 (de) | 2006-11-29 |
Family
ID=34088764
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04740935A Expired - Lifetime EP1649121B1 (de) | 2003-07-23 | 2004-07-12 | Innenrüttelvorrichtung mit befreiungseinrichtung |
Country Status (6)
Country | Link |
---|---|
US (1) | US20080316853A1 (de) |
EP (1) | EP1649121B1 (de) |
JP (1) | JP2006528289A (de) |
DE (2) | DE10333555B4 (de) |
ES (1) | ES2276318T3 (de) |
WO (1) | WO2005012669A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5207486B2 (ja) * | 2009-10-07 | 2013-06-12 | エクセン株式会社 | コンクリートバイブレータ |
ES1073625Y (es) * | 2010-12-15 | 2011-04-07 | Ind Technoflex Sa | Aparato vibrador para compactar hormigon |
JP5618161B2 (ja) * | 2012-06-20 | 2014-11-05 | エクセン株式会社 | コンクリートバイブレータ |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3605583A (en) * | 1969-04-01 | 1971-09-20 | Tampo Mfg Co Inc | Vibratory roller compacting apparatus and method |
US3785529A (en) * | 1971-10-29 | 1974-01-15 | Vibranetics | Flowable material storage means |
JPS59213863A (ja) * | 1983-05-18 | 1984-12-03 | 大崎建設株式会社 | コンクリ−ト締固め装置 |
AU692479B2 (en) * | 1993-11-30 | 1998-06-11 | Sakai Heavy Industries, Ltd. | Vibrating mechanism and apparatus for generating vibrations for a vibration compacting roller with a variable amplitude |
DE29501936U1 (de) * | 1995-02-07 | 1995-03-30 | Schreiber, Heinrich, 74629 Pfedelbach | Werkzeug zum Verdichten von Beton |
DE29505785U1 (de) * | 1995-04-04 | 1995-06-01 | RAVI Bau-Vibriermaschinen GmbH, 01454 Radeberg | Vibrator |
JP3235027B2 (ja) * | 1997-03-11 | 2001-12-04 | 信濃電気株式会社 | コンクリートバイブレータ |
US6030112A (en) * | 1998-05-06 | 2000-02-29 | Milek; Robert C. | Slurry batcher mixer |
DE19916378C2 (de) * | 1999-04-12 | 2003-08-21 | Wacker Construction Equipment | Innenrüttelvorrichtung mit veränderbarer Schwingungsamplitude |
JP3604367B2 (ja) * | 2001-03-22 | 2004-12-22 | エクセン株式会社 | コンクリートバイブレータ用ホース |
-
2003
- 2003-07-23 DE DE10333555A patent/DE10333555B4/de not_active Expired - Fee Related
-
2004
- 2004-07-12 EP EP04740935A patent/EP1649121B1/de not_active Expired - Lifetime
- 2004-07-12 US US10/595,056 patent/US20080316853A1/en not_active Abandoned
- 2004-07-12 JP JP2006520726A patent/JP2006528289A/ja active Pending
- 2004-07-12 DE DE502004002202T patent/DE502004002202D1/de not_active Expired - Lifetime
- 2004-07-12 ES ES04740935T patent/ES2276318T3/es not_active Expired - Lifetime
- 2004-07-12 WO PCT/EP2004/007683 patent/WO2005012669A1/de active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO2005012669A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2005012669A1 (de) | 2005-02-10 |
DE10333555B4 (de) | 2008-03-27 |
EP1649121B1 (de) | 2006-11-29 |
DE502004002202D1 (de) | 2007-01-11 |
US20080316853A1 (en) | 2008-12-25 |
DE10333555A1 (de) | 2005-02-24 |
ES2276318T3 (es) | 2007-06-16 |
JP2006528289A (ja) | 2006-12-14 |
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