CN2485811Y

CN2485811Y - Energy saving flat wire clip with inner thread

Info

Publication number: CN2485811Y
Application number: CN 01248101
Authority: CN
Inventors: 孙兆兴
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-06-07
Filing date: 2001-06-07
Publication date: 2002-04-10
Anticipated expiration: 2011-06-07

Abstract

The utility model relates to a wire clamp used in power transformer device, in particular to an energy conservation wire clamp with an internal screw thread plane. The utility model is a coaxial welding structure of a copper tube with same internal screw thread and a transition plate which is made of copper or aluminum material. The whole body is assorted with the screw thread of a copper terminal pillar. The terminal pillar and the wire clamp or term bus are tightly contacted with the end surface plane of the transition plate, and are fastened by a fastening nut through a flat gasket. The utility model has the advantages of small size of the whole body, easy mounting, energy conversation and high safety. The utility model is suitable to be used in power device which takes the screw as the terminal pillar.

Description

A kind of energy-saving internal thread plane wire clamp

The utility model relates to the converting equipment wire clamp, is specially a kind of energy-saving internal thread plane wire clamp.

At present, make the connected mode of power equipment and the lead or the busbar of binding post with screw rod, adopt lead to press-fit binding post or device clamp usually after, be connected with the copper binding post; (is example with the binding post) as shown in Figure 1, binding post 6 passes copper binding post 1, by plain washer 3, with locking nut 2 lockings (device clamp, busbar are connected similarly with binding post), there is following shortcoming in this connected mode: 1) binding post and plain washer contact area are little, contact point many (they being screw rod and nut, nut and plain washer, plain washer and binding post) between copper binding post and binding post or device clamp or the busbar, thus cause power loss big; 2) locking nut should have locking effect, and also wants the conducting electric current, easily causes looseningly because of heating, even burn out screw rod and joint, and the oil sealing rubber cushion is easily aging, causes leakage of oil.Because of can not satisfy requirement than this connected mode by big electric current.

Recently screw thread wire clamp (as shown in Figure 2) occurred, it is that head with inner screw thread copper pipe and screw bolt-type device clamp is welded; In addition, also have as shown in Figure 3 and the similar pole grasp type wire clamp of screw thread wire clamp.This wire clamp has solved lead and the little problem of binding post contact area preferably, but has following shortcoming: 1) scope of application is little, only is applicable to being connected of lead and binding post; 2) overall dimensions (mainly being length) are bigger, and many occasions can not adopt because of the restriction that is subjected to installing space; 3) cost is higher, and assembling the time also need increase a locking nut, could guarantee excellent contact.Up to the present, the screw rod binding post does not still have desirable mode with being connected of lead.

The purpose of this utility model provides a kind of electric energy loss energy-saving internal thread plane wire clamp little, safe, applied widely.

Technical solution of the present utility model is: have copper pipe and rebound, be the Welding Structure of the rebound of tapped copper pipe and copper or aluminum, its whole and copper binding post threaded engagement; The axis normal of described copper pipe is in copper or aluminium rebound plane, rebound has the mesopore identical with the copper pipe diameter, and is coaxial with copper pipe, and copper or al wiring terminal, device clamp or busbar closely contact with rebound end face plane, and, lock with locking nut by plain washer.

Described rebound is a square; Leave the gap between described copper pipe end face and insulator locking nut, its external cylindrical surface has two symmetrical planes.

Compared with prior art, the utlity model has following advantage:

1. energy-conservation.Because the utility model has increased effective contact area on structural design, binding post is contacted well with binding post, device clamp or busbar, reduce a contact point (current path is: binding post to plane wire clamp, plane wire clamp to binding post or device clamp or busbar), the contact resistance of whole joint is reduced, electric energy loss on the joint reduces, thereby plays energy-conservation effect.

2. safe.It is remarkable to use the utility model solution conductor joint heating problem effect, can eliminate a burn-back accident, improves the reliable rate of power equipment.

3. applied widely.The utility model overall dimensions is less, volume is little, manufacturing process is simple, simple installation, its overall dimensions can be with binding post size respective change, easily have series of one's own, extensively Ying Yu does the power equipment of binding post and being connected of binding post, device clamp or busbar with screw rod, and realizes excellent contact; Being connected of copper strips binding post (as shown in Figure 8) on the low tension terminal that more is applicable to simultaneously distribution transformer inside and the winding leads.

4. cost is low.The utility model is saved a nut and a plain washer, utilizes the nut on the screw rod can realize locking, and cost reduces.

Fig. 1 is a prior art middle connecting terminal assembling schematic diagram.

Fig. 2 is a threaded line clamping structure schematic diagram in the prior art.

Fig. 3 is a pole grasp type wire clamp structural representation in the prior art.

Fig. 4 is the utility model front view.

Fig. 5 is that the A of Fig. 4 is to view.

Fig. 6 is the utility model assembling schematic diagram.

Fig. 7 is a contact resistance loss power curve chart of using the utility model and Fig. 1 contrast.

Fig. 8 is that the utility model is applied to the assembling schematic diagram on the low tension terminal of distribution transformer inside.

Fig. 9 is the interior copper strips binding post assembling of a distribution transformer schematic diagram in the prior art.

The utility model is described in further detail below in conjunction with drawings and Examples.

Embodiment 1

Shown in Fig. 4～6, be the coaxial welding structure with the copper pipe 42 and the aluminium rebound 41 of identical internal thread, integral body after the welding and copper binding post 1 threaded engagement; The axis normal of described copper pipe 42 is in aluminium rebound 41 planes, and al wiring terminal 6 closely contacts with aluminium rebound 41 end face planes, and by plain washer 3, with locking nut 2 lockings, 5 of copper pipe 42 end faces and insulator locking nuts leave the 2mm gap; For ease of being connected with busbar, rebound 41 makes square, and copper pipe 42 external cylindrical surfaces are milled out two symmetrical planes, is convenient to tighten; Described aluminium rebound 41 plays the copper-aluminium transition effect in al wiring terminal 6 and copper binding post 1 connection procedure; Insulator locking nut 5 is used to lock electric elements 7.

Measure the connected mode of binding post as shown in Figure 1 and use the contact resistance of connected mode of the present utility model as shown in Figure 6, result: the contact resistance R of Fig. 1 connected mode with QJ44A type D.C. resistance double bridge ₁Be 0.01359 Europe; The contact resistance R of Fig. 6 connected mode ₂Be 0.00959 Europe, contact resistance R ₂Compare R ₁Reduce 29.43%, the loss power that these two contact resistance value produce by the different loads electric current time as shown in Figure 7.

Using energy-saving principle of the present utility model is to have increased effective contact area, has reduced by a contact point, the contact resistance of joint is reduced, according to formula W=I ²Rt (the energy that W-consumes; The electric current that I-passes through; The R-contact resistance; T-action time), along with R reduces, W is proportional to be reduced, thereby reaches purpose of energy saving, can intuitively find out its energy-saving effect by the curve of Fig. 7, for example: by 100 peace electric current, then R ₁And R ₂Loss power corresponding on curve is respectively 137 watts and 97 watts, uses the utility model, and loss power has reduced 40 watts, promptly reduces 29.43%; Can find out also from Fig. 7 that simultaneously electric current is big more, the difference of their loss power is big more, and promptly electric current is big more, and energy-saving effect is remarkable more.

Embodiment 2

Difference from Example 1 is:

The utility model also is applicable on the low tension terminal of distribution transformer inside, as shown in Figure 8, the utility model is screwedly mounted on the copper binding post 1, and copper strips binding post 8 closely contacts with copper rebound 41 end face planes, by plain washer 3, with locking nut 2 lockings; 5 of copper pipe 42 end faces and insulator locking nuts leave the 2mm gap, and insulator locking nut 5 is used to lock electric elements 7.

At load current is on four low tension terminals of the 100 same station power distribution transformers of pacifying, the inside and outside the utility model that all adopts, and the few loss of each plane wire clamp is by 40 watts of calculating (as shown in Figure 7), and amounting to few loss is 240 watts (it is zero establishing neutral current).This shows that it is remarkable to use the utility model solution conductor joint heating problem effect, can eliminate a burn-back accident, improves the reliable rate of power equipment.

Comparative example

As shown in Figure 9, copper strips binding post 8 is as follows with the conventional connected mode of copper binding post 1 in the distribution transformer: pass the copper strips binding post 8 of copper binding post 1, the one end is by plain washer 3, with locking nut 2 lockings; Its other end is plain washer 3, insulator locking nut 5 and electric elements 7 etc., wherein insulator locking nut 5 should have locking effect, and also wants the conducting electric current, easily the heat that is produced is dispersed in the oil, make oily temperature rise, therefore this connected mode can not satisfy the requirement by big electric current.

Claims

1. an energy-saving internal thread plane wire clamp has copper pipe and rebound, it is characterized in that: be the Welding Structure of the rebound (41) of tapped copper pipe (42) and copper or aluminum, and its whole and copper binding post (1) threaded engagement; The axis normal of described copper pipe (42) is in copper or aluminium rebound (41) plane, rebound (41) has and the identical mesopore of copper pipe (42) diameter, coaxial with copper pipe (42), copper or al wiring terminal (6), device clamp or busbar closely contact with rebound (41) end face plane, and by plain washer (3), with locking nut (2) locking.

2. energy-saving internal thread according to claim 1 plane wire clamp is characterized in that: when assembling, leave the gap between its copper pipe (42) end face and the insulator locking nut (5).

3. energy-saving internal thread according to claim 1 plane wire clamp is characterized in that: described rebound (41) is a square.

4. energy-saving internal thread according to claim 1 plane wire clamp is characterized in that: described copper pipe (42) external cylindrical surface has two symmetrical planes.