CN101800368A

CN101800368A - Internal expanding centre coupling

Info

Publication number: CN101800368A
Application number: CN201010147771A
Authority: CN
Inventors: 钱秋英
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-03-18
Filing date: 2010-03-18
Publication date: 2010-08-11
Anticipated expiration: 2030-03-18
Also published as: CN101800368B

Abstract

The invention discloses an internal expanding centre coupling, which is cylindrical. The diameter of the coupling depends on the thickness and the current-carrying capacity of a bus; a protruding part is arranged in the middle of the coupling; an oblique groove is reserved in the axial direction of the coupling; an expansion pin is inserted into the oblique groove and is connected with a curved screw cap through a screw rod; a curved surface of the expansion pin is trapezoidal; the middle part of the protruding part on the coupling has a bigger diameter than the two ends of the protruding part on the coupling; and the diameter difference depends on the thickness of the bus. When the coupling is used, two ends of the coupling are inserted into the bus by external force; when a screw on the expansion pin is frapped, because the expansion pin is trapezoidal, the expansion pin stretches the oblique groove so that the diameter of the middle part of the oblique groove is increased and the expansion pin is tightly combined with the bus. The internal expanding centre coupling of the invention has the advantages of safe and reliable performances, good conductivity, convenient use, simple operation, cost-saving property and the like and can be widely promoted.

Description

The internal-expansion type transition joint

Technical field:

Patent of the present invention 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:

Patent of the present invention 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 scheme that patent of the present invention adopts 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, patent of the present invention 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 patent of invention structural representation;

Fig. 2 is the patent of invention 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.

Patent of the present invention have 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, it is characterized in that: joint 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.

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 are slightly larger than two diameter, have more size and decide according to the thickness of bus.