JPH031871Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a conductor connecting device used for a conductor connecting portion in a gas-insulated switchgear or the like.

[Conventional technology]

Tulip-type contacts are generally used for this type of conductor connection.

Utility model registration number 1352140 "Conductor connection contact" by the same applicant for this Reuripp type contactor
There is, and this application relates to its improvement. FIG. 2 shows a cross-sectional view of the same, in which a large number of contact pieces 3 are arranged radially around the shaft ends of cylindrical conductors 1 and 2 whose shaft ends face each other and whose axes are arranged on the same straight line. Grooves 3a and 3b are provided on the outer periphery, and contact pressure springs 4 and 5 made of ring-shaped coil springs are mounted, and the contact pieces 3 are crimped onto the conductors 1 and 2 by their tightening force. In this way, the conductors 1 and 2 are connected by the contact piece 3.

However, in order to hold the contact pieces 3 perpendicular to the outer peripheral surfaces of the conductors 1 and 2 and parallel to the axes of the conductors 1 and 2, the guide 7 provided with peripheral radial slits 6 as shown in FIG. 8 to the shaft end of one conductor 2, and the contact piece 3 is inserted into each slit 6. For simplicity, only the head of the bolt 8 will be described and the shaft portion will be omitted. The contact piece 3 has a rectangular recess 3c at the bottom, into which guide pieces 7a, 7 are attached.
The slit 6 of b is fitted to prevent the contact piece from moving in the longitudinal direction.

This guide 7 is made up of two guide pieces 7a, 7 each having slits 6 of the same shape radially provided on the periphery.
b are fixed and integrated by spot welding or the like, one guide piece 7a is bent near the periphery, and a distance A is provided between it and the other guide piece 7b.
This distance A needs to be longer than a certain value so that the contact piece 3 is held parallel to the axes of the conductors 1 and 2 without being twisted.

In addition, in order to shorten the length L ₁ of the contact piece 3 from the point of view of miniaturization, the shaft ends of the conductors 1 and 2 must be brought close to each other. Hollow out the center part 1a of the shaft end. Further, the contact piece 3 needs to maintain a cross-sectional area corresponding to the current carrying capacity, and in consideration of mechanical strength, the height h from the bottom to the groove must be set to a certain value or more.

[Problem that the invention attempts to solve]

Here, in order to increase the current carrying capacity while keeping the dimensions of each part of the connection part constant, it is necessary to increase the number of contact pieces 3 and to increase the contact pressure to the conductors 1 and 2. To increase the contact pressure, use contact pressure springs 4 and 5.
However, since this type of spring has a small coil diameter, if the ring diameter is made smaller and the elongation is increased, the material's allowable limit will be exceeded immediately. Therefore, in order to increase the contact pressure, it is necessary to increase the number of contact pressure springs.

For this reason, Fig. 4 shows a state in which one contact pressure spring is added, and the contact piece 9 used for this has the same length L ₁ as the conventional contact piece 3, but from the point of view of mechanical strength. In order to maintain the height h, conventional contact pressure springs 4, 5
The contact pressure spring 10 added between the rings has an outer diameter φD ₂
There is a drawback that the ring outer diameter φD ₁ of the conventional contact pressure springs 4 and 5 is larger than that of the conventional contact pressure springs 4 and 5.

Further, FIG. 5 shows a case where three contact pressure springs 4, 5, and 10 have the same ring outer diameter, and in this case, the contact piece 11 does not have a recess at the bottom, but instead has a protrusion at the bottom. 11a and 11b are provided, and the guide piece 7
It is configured to fit into the slits a and 7b to prevent movement in the longitudinal direction. In this way, contact piece 1
Since No. 1 does not have a recessed portion in the lower part, the groove for holding the contact pressure spring 10 can be made at the same height as the grooves of the contact pressure springs 4 and 5, and the outer diameter of the ring can also be set to φD ₁ .
However, in order to do this, the bent part around the guide piece 7a enters between the shaft ends of the conductors 1 and 2, so the shaft end spacing has to be widened to d ₂ from the conventional d ₁ . The length L ₂ of the contact piece 11 is larger than the conventional length L ₁ .

In this way, in the structure shown in FIGS. 4 and 5 above, the connecting portion is large, and in the case of FIG. 4 in particular, the contact pressure spring 1
0, the outer diameter of the ring increases, so the diameter of the shield (not shown) provided on the outer periphery increases.
Both are major drawbacks when provided within the blocking section.

[Means for solving problems]

The present invention solves these drawbacks, and by changing the shape of the guide and bending the slit portions of the two guide pieces symmetrically, it is possible to add contact pressure springs without increasing the size of the device. This is what I did.

〔Example〕

FIG. 1 shows a cross-sectional view of an embodiment of the present invention, in which a slit 6 is provided around the periphery as shown in FIG. Guide pieces 12a, 12b
The guide 12 is configured by: That is, the guide 12 is made by forming slits radially around the periphery, and by turning one of two guide pieces 12a and 12b of the same shape with the slit portions bent in the same way and joining them together with the slit portions separated from each other by spot welding or the like. It is fixed to a Y-shaped cross section, for example, as shown in the figure, and is attached to the shaft end of one conductor 2 with a bolt 8 in the same manner as in the prior art, and the contact piece 13 is inserted into a slit around the periphery.

Here, the length of the contact piece 13 is the same as the conventional one.
At L ₁ , there is also a groove 13 on the outer periphery of the contact piece at the same height as the grooves 13a and 13b on the conductor 1 and 2 sides.
c are provided, and contact pressure springs 4, 5 and 10 are attached to them, respectively. However, instead of providing a recess at the bottom of the contact piece 13, protrusions 13e and 13f are provided at the bottom with guide grooves 13d in which the guide 12 fits, and which protrude downward on both sides. If you do this,
By providing the groove 13c at the same height as 13a and 13b while maintaining the height h, the outer diameters of the rings of the contact springs 4, 5, and 10 can all be set to φD ₁ , and the shaft ends of the conductors 1 and 2 can be The spacing is maintained at d ₁ as in the conventional case, and the length of the contact piece 13 is maintained at L ₁ .

Since the conventional guide 7 shown in FIG. 2 is asymmetrical, if it is mistakenly attached to the conductor 2 in the opposite direction, the contact piece 3 will not come into contact with the conductor 1, or the contact will be extremely incomplete. The guide 12 of the present invention is bilaterally symmetrical, making it easy to manufacture, and since the entire contactor is bilaterally symmetrical, there will be no problem even if the conductors 1 and 2 are installed in opposite directions as long as they have the same diameter.
Furthermore, this device can be used not only in air but also in insulating gases such as SF ₆ gas.

[Effect of idea]

In this way, in the present invention, the shape of the guide is changed, and by using two guide pieces of the same shape whose peripheries are bent in the same way as each other, one of them is turned over and fixed to each other to form a symmetrical guide. , the number of contact springs can be increased without increasing the external size. In this way, it is possible to reduce the number of types of guide pieces and increase the contact pressure by adding contact pressure springs without increasing the size of the connection part, increasing the current carrying capacity, and it can be used only as a conductor connection device for busbars etc. It can also be used as a contact for a circuit breaker.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing an embodiment of the present invention, Fig. 2 is a cross-sectional view showing a conventional example, Fig. 3 is a plan view showing a guide, Fig. 4 and Fig. 5 are conventional examples for adding contact pressure springs. FIG. 1, 2...Conductor, 4,5,10...Contact pressure spring,
6...Slit, 12...Guide, 12a, 12
b...Guide piece, 13...Contact piece.

Claims (1)

[Scope of utility model registration request] A large number of contact pieces connecting the shaft ends are provided radially on the outer periphery of the cylindrical shaft ends of the first and second conductors which are arranged coaxially and facing each other, and a number of slits are provided radially around each of the contact pieces. A guide formed by combining two guide pieces made of conductor pieces is fixed to the shaft end of the first conductor, and the contact pieces are respectively inserted into the slits of the guide, and the In a conductor connection device in which a ring-shaped contact pressure spring is attached to a groove provided at each end of the first and second conductor shafts, the two guide pieces are formed in the same shape with the outer periphery bent in the same way. one side is reversed, the peripheral slit portions are separated and combined to form the guide, and a ring-shaped contact pressure spring is installed by providing a groove between the spaced apart slits of the guide piece on the outer periphery of the contact piece. A conductor connection device characterized by: