CN201797059U

CN201797059U - Internal expanding intermediate joint

Info

Publication number: CN201797059U
Application number: CN2010201546829U
Authority: CN
Inventors: 钱秋英
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-03-18
Filing date: 2010-03-18
Publication date: 2011-04-13
Anticipated expiration: 2020-03-18

Abstract

The utility model discloses an internal expanding intermediate joint. The diameter of the cylindrical joint can be determined according to the thickness and the carrying capacity of a bus; a projection is arranged in the middle of the joint; a tapered slot is arranged in the axial direction of the joint; an expansion pin is inserted into the tapered slot of the joint and connected with a curved-surface nut by the aid of a screw rod; a curved surface of the expansion pin is trapezoidal; the diameter of the middle of the projection on the joint is slightly larger than that of each of two ends of the projection; and excessive sizes are determined according to the thickness of the bus. When the joint is used, two ends of the joint are partially inserted into the bus by external force. When screws on the expansion pin are screwed, the expansion pin trapezoidally expands the tapered slot, and the diameter of the intermediate joint is increased so that the intermediate joint is closely combined with the bus. The internal expanding intermediate joint has the advantages of safe and reliable performance, fine conducting performance, convenience for use, simplicity in operation, cost economization and the like, and has excellent popularization effect.

Description

The internal-expansion type transition joint

Technical field:

The utility model relates to a kind of pipe bus connection structure, relates in particular to that a kind of stress is big, gapless internal-expansion type transition joint between the contact-making surface.

Background technology:

Progress along with science and technology, and the raising of living standards of the people, power consumption increasing gradually, originally the copper bar bus in the electric power system can not satisfy the operation of big load current, therefore a kind of novel product---tube type bus has been born, tube type bus has improved the load ampacity greatly, yet, numerous pipe bus manufacturing firms all runs into a same difficult problem, that be exactly tube type bus in the middle of the part that connects can not guarantee excellent conducting performance, be hem type joint or embedded joint all exist same problem be exactly under bus conduction stress the built on stilts part that connects sink easily, cause the place of connection to produce the slit and increased contact resistance.

Summary of the invention:

The utility model is at above the deficiencies in the prior art, a kind of locking principle that adopts braking automobile is provided, and not only stress is big, and contact area is big, therefore seamless generation between the contact-making surface makes the almost nil internal-expansion type transition joint of contact resistance between the tube bus connector.

For realizing the above object, the technical solution adopted in the utility model is:

The internal-expansion type transition joint, form by joint, skewed slot, expansion pin, screw rod, curved surface nut, its center tap is cylindric, diameter is decided according to the size of bus thickness and ampacity, the joint centre is provided with bossing, joint axis to direction have a skewed slot, expansion pin is inserted in the joint skewed slot, is connected with the curved surface nut by screw rod.

Described expansion pin curved surface is trapezoidal shape.

Bossing on the described joint, mid diameter are slightly larger than two diameter, have more size and decide according to the thickness of bus.

When using, the utility model patent joint two head part are inserted in the bus with external force, during screw above tightening up expansion pin, because it is big with the skewed slot support that expansion pin is a trapezoidal shape, cause the medial head diameter to become big, itself and bus are combined closely, integral body has following advantage: (1) permission power is big, is 1.5 times of ordinary couplings stress through test of many times internal-expansion type joint; (2) contact area is big, because stress is big, so mid portion can not sink in allowing span in installation process, thereby the part that connects does not have the slit yet and produces, in addition owing to the internal-expansion type joint need not slotted on the pipe bus, so can not cause owing to the distortion of bus connector fluting produces the slit; (3) easy to operate, owing to have only a screw in the middle of the inner intumescence type joint, only need stubborn one screw that joint is expanded and tighten up, played the effect of pulling one hair and move the whole body, saved time and manpower greatly; (4) production cost is little, avoid the fault that causes because of manual operation, compare with original hem type joint, the internal-expansion type joint has not only guaranteed enough sectional areas but also has saved many unnecessary materials, because simple to operate, so the internal-expansion type joint has also been avoided neglecting the contact slit that produces because of manual operation.

Description of drawings:

Fig. 1 is the utility model structural representation;

Fig. 2 is the utility model generalized section;

Embodiment:

As shown in the figure, the internal-expansion type transition joint, form by joint 1, skewed slot 2, expansion pin 3, screw rod 4, curved surface nut 5, during concrete enforcement, with external force joint 1 two is inserted in the bus, the part of inserting intermediate projections on the joint of back is equal with bus, when tightening screw rod 4 and tighten up screw above the expansion pin 3, because it is big with skewed slot 2 supports that expansion pin 3 is trapezoidal shapes, causes transition joint 1 diameter to become big, and itself and bus are combined closely.

The utlity model has performance safety reliable, conduct electricity very well, easy to use, simple to operate, save the advantage such as cost, have very big popularizing action.

Claims

1. internal-expansion type transition joint is characterized in that: joint is cylindric, and the joint centre is provided with bossing, joint axis to direction have a skewed slot, expansion pin is inserted in the joint skewed slot, is connected with the curved surface nut by screw rod.

2. internal-expansion type transition joint according to claim 1 is characterized in that: described expansion pin curved surface is trapezoidal shape.

3. internal-expansion type transition joint according to claim 1 is characterized in that: bossing on the described joint, mid diameter is greater than two diameter.