WO2008023972A1 - Assemblage de conduites de bus motorisé - Google Patents

Assemblage de conduites de bus motorisé Download PDF

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Publication number
WO2008023972A1
WO2008023972A1 PCT/MY2007/000060 MY2007000060W WO2008023972A1 WO 2008023972 A1 WO2008023972 A1 WO 2008023972A1 MY 2007000060 W MY2007000060 W MY 2007000060W WO 2008023972 A1 WO2008023972 A1 WO 2008023972A1
Authority
WO
WIPO (PCT)
Prior art keywords
joint
bolt
motorised
main gear
joint assembly
Prior art date
Application number
PCT/MY2007/000060
Other languages
English (en)
Inventor
Chih Bok Lew
Original Assignee
Chih Bok Lew
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
Application filed by Chih Bok Lew filed Critical Chih Bok Lew
Publication of WO2008023972A1 publication Critical patent/WO2008023972A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G5/00—Installations of bus-bars
    • H02G5/007—Butt joining of bus-bars by means of a common bolt, e.g. splice joint

Definitions

  • the present invention relates to electrical bus duct assemblies. More particularly, the present invention relates to means of joining individual bus duct sections.
  • Bus ducts axe used to distribute electrical power for higher power systems.
  • Bus duct should contain a suitable j oint along both ends.
  • the function of the joint is to conduct electricity well. Connecting of 3 meter sections making up an entire run connecting from transformer to switchboard or other means of electrical distribution. As the clamp force increases, the join ⁇ resistance reduces.
  • the present invention provides a motorised joint assembly for joining two bus ducts, said assembly comprising a plurality of joint conductors to provide electical connectivity between the bars in two bus ducts, a plurality of joint insulators to separate the joint conductors from each other, a bolt inserted through the joint conductors and the joint insulators, a main gear attached to the head of the bolt, a drive gear engaged to the main gear, said drive gear smaller than the main gear, a drive motor powering the drive gear through a shaft connected to the drive gear, a nut secured to the bolt once the bolt is inserted through the joint conductors and the joint insulators to provide an initial tightening, a current limiter to cut-off current supply to the drive motor once the current flow exceeds a pre-determined level.
  • At least one disc spring is provided on each end of the joint assemby to provide an evenly distributed clamping pressure on the joint conductors and joint insulators.
  • a locking means is provided to stop the untightening of the bolt and main gear, said locking means comprising a direction flag pivoting at a point adjacent to the main gear.
  • Power for the drive motor is provided by the bus duct bars once current starts to flow through the bus ducts.
  • FIG 1 shows two bus ducts joined by a motorised bus duct joint.
  • FIG 2 shows the motorised bus duct joint in detail.
  • IG 3 shows the gear direction control mechanism of the motorised bus duct joint.
  • IG 4 shows the lock pin assembly of the motorised bus duct joint.
  • the present invention relates to electrical bus duct assemblies. More particularly, the present invention relates to means of joining individual bus duct sections.
  • the motorised bus duct joint shall be described according to the preferred embodiments of the present invention and by referring to the accompanying description and drawings.
  • FIG 1 shows two bus duct sections (20) connected by a joint assembly (10).
  • the example makes use of bus ducts having four runs although the same method and concept can be used for bus ducts with any number of runs.
  • FIG 2 show individual components of the motorised bus duct joint assembly (10).
  • this joint assembly (10) comprises a drive gear (1), a main gear (2) with a bolt (8), four joint conductors (3), five joint insulators (4), a drive motor (5), a nut (6) and two disk springs (7).
  • the individual components and their functions will be described hereon.
  • the joint insulator is one of the traditional items which all the bus duct joints will have. It has a circular aperture in the centre. These joint insulators are arranged alternately with joint copper. They segregates the phases away so that there will not be any electrical short circuit.
  • the joint conductors are made of copper, aluminum or other metals with high conductivity and have a circular aperture in the centre. Each joint conductor is disposed in between two joint insulators to connect a phase run from one bus duct section (20) to its corresponding phase run in another bus duct section. Therefore the joint conductor is to conduct the electricity efficiently between the two bus duct runs.
  • the bus runs are laid to have maximum surface overlap with the joint conductors and pressed/tightened to provide good conductivity.
  • a tightening torque of at least 70 Nm is crucial to lower the contact resistance between the joint conductor and the bus run surfaces. Otherwise, these joints conductors will heat up and melt. This is the part where most of the traditional bus duct system fails.
  • the function of the disc spring is to ensure an even clamp force is exerted onto the joint assemblies when the bus duct joints are tightened. It also acts like a spring where it will keep a spring loaded action and retains the 70 Nm for a long term. Even if anything should happen where the joint starts to loosen, such as the thinning of the joint insulators, joint conductors or bus runs, this spring will retract back into it's original position and maintain a 70 Nm torque. It should also be noted that the joint conductors and bus runs expand when high current is being supplied and the bus runs heats up.
  • a nut preferably a non-metal nut such as a nylon nut is inserted into the main gear bolt which runs through a hole bored in the centre of the joint coppers and joint insulators.
  • the nut must be stationery relative to the joint assembly (10). This is achieved by having a non slipping nut surface or having the nut locked to the disc spring by the use of a groove/ridge mechanism.
  • the main gear has a bolt directly attached to it.
  • the bolt is preferably milled out in one piece together with the main hear though it can also be a separate component.
  • the threads at the end of the bolt will turn inside the nut and will cause the joint assembly (10) to be tightened.
  • the drive gear (1) providing the torque to the main gear is attached to the drive motor. Both the drive gear (1) and the main gear make contact with each other at the sharp- pointing gears.
  • the gear ratio between the drive gear (1) and the main gear is such that there is enough torque provided by the drive motor to drive the main gear.
  • the drive motor is meant to provide torque power to the drive gear (1) which will subsequently rotates the main gear.
  • the mobility of each is driven by the drive motor in first instance.
  • the drive motor will get its 24OV power supply from the bus ducts itself.
  • the drive motor As soon as the bus ducts are turned on, the drive motor is energized and will start to turn. In situations where the operating voltage not 240V 5 the drive motor or the current limter will be modified for different requirements.
  • a current limiter (not shown) is incorporated in the embodiment.
  • the current limiter is located between the power supply from the bus ducts and the motor. While the preferred method is to use a fuse means of a certain Ampere ratings to reduce cost, it is also possible to use a circuit breaker as a current limiter.
  • the joint assembly (10) is also provided with a locking means (30) to stop the main gear and bolt assembly (10) from turning in a reverse direction and getting loose as the joint conductors and bus runs expand and shrink due to temperature variations.
  • FIG 3 shows the preferred means, which is to use a direction flag which will let the main gear move in one direction but not the other direction.
  • a plastic cover is provided that will cover the entire motorized system in order to keep all distorting elements such as dust, water, insects and as a safety measure, to avoid electrocution.
  • the workers When the bus duct sections (20) are joined together, the workers will attach the bus duct sections (20) by using the motorised joint assembly (10).
  • the bus runs will be joined by overlapping them on the joint conductors, and the bolt from the main gear is inserted and attached with a nut on its other end.
  • the wires from the motor are attached to the relevant bus runs.
  • the workers need not tighten the joint assembly (10) fully. As such, they can do their job faster and need not bring any heavy-duty tightening tools.
  • the drive motor starts and turns the drive gear (1) to begin the tightening of the joint assembly (10).
  • the ampere increases in proportion to the tightness of the joint assembly (10). For certain tightness there is an equivalent increase in ampere. Once the required tightness, such as 70 Nm, is reached the current will automatically be cut-off by the current limiter.
  • this method of connecting the bus ducts will eliminate the human factor involved in the tightening of joint bolt.
  • the abovesaid embodiment provides for a joint assembly (10) which enables a specific level of tightness.
  • the lock pin assembly (40) comprises a pin sitting on the main gear together with a spring loaded system.
  • the main gear in this case has a spiral slot on the outer surface. It allows the lock pin assembly (40) to sit in. As the drive gear (1) turns, the main gear will turn accordingly and the pin will glide in the slot spiralling outwards. At the end of the spiral there is a hole that allows the spring loaded pin to lock in. The pin sits and runs on top of the turning main gear. The spring tension will always be there pressing the pin on top of the running gear. The purpose of this pin is to lock the gear once the mechanism has made a certain number of turns. As soon as the lock pin meets the hole on the main gear, the spring will push the pin into this hole, stopping the main gear from moving in any direction.
  • a pre-loaded spring can be incorporated into the invention whereby as soon as the bus ducts are installed, there is a spring that will pre-clanip the entire joint assembly (10) onto the conductors even before the motor starts to turn.
  • This pre-loaded spring will eliminate any conductor that is barely touching each other which can cause arcing if the bus ducts are energized suddenly.
  • This pre-loaded spring does not carry a torque up to 70 Nm but nevertheless ensures that there are no air gaps between the touching conductors.
  • the main gear is directly connected and powered by the drive motor.
  • This embodiment needs a nut with more threads and have a limitation to the level of tightening since it does not employ a reduction gear to increase torque transmitted to the bolt. Nevertheless such an embodiment is of simpler construction and can be useful for joints needing a medium level of tightening.
  • This embodiment uses a locking means comprising a direction flag. However, if a locking means is not required, the teeth of the main gear shown in the embodiment can be eliminated.
  • the main gear can be provided with a hexagon headed bolt which allows a worker to turn and release the 70 Nm torque manually.
  • the lock pin if used, can also be shifted to an unlock position so that the main gear can be released.
  • An indicator coloured 'red” and “green” can also be incorporated to allow visual inspection.
  • this can be implemented by a simple function where as soon as the lock pin is in position, the green color can be seen on the external cover of this assembly (10).

Landscapes

  • Installation Of Bus-Bars (AREA)

Abstract

La présente invention concerne un ensemble d'assemblage motorisé permettant d'assembler deux conduites (20) de bus, ledit ensemble comprenant une pluralité de conducteurs (3) d'assemblage permettant d'établir une connectivité électrique entre les barres de deux conduites (20) de bus, une pluralité d'isolants (4) permettant de séparer les conducteurs (3) les uns des autres, un boulon (8) inséré dans lesdits conducteurs (3) et isolants (4), un engrenage principal (2) fixé à la tête du boulon (8), un engrenage (1) d'entraînement venant en contact avec l'engrenage principal (2), ledit engrenage (1) d'entraînement étant plus petit que l'engrenage principal (2), un moteur (5) d'entraînement alimentant l'engrenage (1) d'entraînement par l'intermédiaire d'un arbre connecté à l'engrenage (1) d'entraînement, un écrou (6) fixé au boulon (8) une fois que le boulon est inséré dans les conducteurs (3) et les isolants (4) pour permettre un serrage initial, et un limiteur de courant pour couper l'alimentation de courant du moteur (5) d'entraînement lorsque le flux de courant dépasse un niveau prédéterminé. De plus, au moins un ressort (7) à disque permettant d'obtenir une force de blocage égale et un moyen (30) de verrouillage permettant d'éviter tout dévissage sont utilisés. La puissance du moteur (5) d'entraînement est fournie par les conduites (20) de bus lorsqu'elles sont alimentées.
PCT/MY2007/000060 2006-08-24 2007-08-22 Assemblage de conduites de bus motorisé WO2008023972A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MYPI20064020 2006-08-24
MYPI20064020 MY151898A (en) 2006-08-24 2006-08-24 Motorised bus duct joint

Publications (1)

Publication Number Publication Date
WO2008023972A1 true WO2008023972A1 (fr) 2008-02-28

Family

ID=38795592

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/MY2007/000060 WO2008023972A1 (fr) 2006-08-24 2007-08-22 Assemblage de conduites de bus motorisé

Country Status (2)

Country Link
MY (1) MY151898A (fr)
WO (1) WO2008023972A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200032346A (ko) * 2018-09-18 2020-03-26 엘에스전선 주식회사 부스덕트 접속키트

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1533676A (fr) * 1967-08-04 1968-07-19 Gen Electric Jonction étanche à boulon unique pour gaines de distribution d'énergie électrique
FR2173375A5 (fr) * 1972-02-22 1973-10-05 Telemecanique Electrique
DE9210448U1 (de) * 1992-08-05 1993-12-09 Kloeckner Moeller Gmbh Verbindungsvorrichtung für Stromschienen in Niederspannungs-Schienensystemen zur Verteilung elektrischer Energie

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1533676A (fr) * 1967-08-04 1968-07-19 Gen Electric Jonction étanche à boulon unique pour gaines de distribution d'énergie électrique
FR2173375A5 (fr) * 1972-02-22 1973-10-05 Telemecanique Electrique
DE9210448U1 (de) * 1992-08-05 1993-12-09 Kloeckner Moeller Gmbh Verbindungsvorrichtung für Stromschienen in Niederspannungs-Schienensystemen zur Verteilung elektrischer Energie

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200032346A (ko) * 2018-09-18 2020-03-26 엘에스전선 주식회사 부스덕트 접속키트
KR102631390B1 (ko) * 2018-09-18 2024-01-29 엘에스전선 주식회사 부스덕트 접속키트

Also Published As

Publication number Publication date
MY151898A (en) 2014-07-14

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