CN201315372Y - Small electric connecting device - Google Patents

Abstract

The utility model discloses a small electrical connection device for ensuring the reliable connection between the zinc oxide valve sheet of the lightning arrester and the basin type insulator, and capable of withstanding the current requirement when the lightning arrester operates, comprising a contact seat, a spring contact finger and a guide ring. The inner cavity of the seat is provided with a V-shaped positioning groove for installing the spring contact finger, a square positioning groove for installing the guide ring and a T-shaped bolt hole. The two spring contact fingers rotate in opposite directions and are embedded in the two V-shaped grooves of the contact seat. , the guide ring is embedded in the square groove of the contact seat. By adopting the static contact design of the double spring contact fingers and positioning with the guide ring of insulating material and reducing the friction between the conductive rod and the contact seat, it can ensure the fixed contact between the zinc oxide valve plate and the contact seat. While the conductive rods on the pot insulator are effectively connected, the uniform distribution of the electric field is ensured, so that the utility model finally achieves the purpose of reliable connection, and can withstand the current requirements when the arrester operates, and is low in cost and easy to install.

Description

Small electrical connection device

technical field

The utility model relates to a small electrical connection device for ensuring the reliable connection between a zinc oxide valve plate of a lightning arrester and a basin-type insulator, and capable of withstanding the current requirement when the lightning arrester operates, belonging to the technical field of high-voltage conductive connection devices.

Background technique

At present, the main structure of the small electric connection device used in the conductive connection part of the domestic lightning arrester (which can also be extended to the conductive part of the high-voltage electrical appliance below 220kV voltage) is to use dozens of copper material contacts similar to type 3 to be installed on the contact seat, and then two The large elastic spring wraps the contact finger to make it a circle, and then installs a pressure equalizing cover on the outermost layer and fastens it with bolts. This solution has dozens of contact fingers, and the contact seat and spring contact fingers are both It is made of brass, and each spring finger is solid and silver-plated, so the cost is very high; and the assembly is also very difficult, and it must be assembled with special tools. Put it in the card slot outside the contact seat, and cover it with a hard spring to prevent it from falling off, and then insert the spring contacts one by one between the spring and the card contact slot, which is more difficult and troublesome. After it is full, use a tool to put another spring on the spring finger, which is very laborious. If there is no tool, it will be more troublesome to install the spring. After the spring is installed, buckle the pressure equalizing cover on the spring finger, It is time-consuming and labor-intensive to loosen the pre-screwed bolts on the contact seat through the pressure equalizing cover and level it with the pressure equalizing cover.

Utility model content

The purpose of the utility model is to provide a small electrical connection device with low cost and easy installation, which is reliable in connection and can withstand the current requirement when the arrester operates.

The technical scheme of the utility model is: only include spring contact fingers, guide ring, cavity-shaped contact seat and T-shaped bolt hole, wherein, the spring contact finger is improved to a circular spring contact finger, and the cavity-shaped contact seat is provided with a round The positioning slot of the spring contact finger is provided with a guide ring positioning slot at the end connected to the conductive rod, and the circular spring contact finger and the guide ring are placed in the corresponding positioning slot in the cavity-shaped contact seat.

The cavity-shaped contact seat is made of aluminum rod material, and the surface of the positioning slot where the circular spring contact finger is installed and the contact surface connected with the zinc oxide valve plate are plated with silver.

The circular spring contact finger is wound by a strip spring with good conductivity. The surface of the spring is silver-plated, and its cross-section is oval. When installed, the opposite direction of rotation is embedded in the positioning slot in the cavity-shaped contact seat. .

The guide ring is a circular structure made of wear-resistant insulating material, and its cross section is square.

The positioning groove for installing the spring contact finger in the cavity-shaped contact seat is V-shaped, and the bottom is arc-shaped, and the angle of the V shape should match the ellipticity of the spring contact finger.

The positioning slot for installing the guide ring in the cavity-shaped contact seat is a square shape matching the cross section of the guide ring.

The utility model uses standard aluminum rods as the contact seat, which has a simple appearance, is cheap and practical, and the inner cavity of the contact seat adopts a V-shaped positioning groove and a T-shaped bolt hole, and the surface of the conductive surface is silver-plated to ensure that the contact between the spring finger and the contact Good contact with the seat; the spring contact finger adopts an elliptical structure made of a special material with good conductivity, which effectively connects the conductive rod and the contact seat; the guide ring fixed in the positioning groove, with the help of effective size and wear-resistant insulating material, While ensuring the running track of the conductive rod, the friction between the conductive rod and the contact seat is avoided, and the metal powder will not fall, which can avoid destroying the electric field.

Through the above design, the effective connection between the zinc oxide valve plate and the conductive rod fixed on the pot insulator is ensured, and the uniform distribution of the electric field is ensured. Compared with the popular small electric connection devices on the market, the premise of ensuring effective current flow Under the circumstances, the characteristics of low cost, light weight and easy installation are realized.

Description of drawings

Fig. 1 is a schematic diagram of the original small electrical connection device;

Fig. 2 is a structural representation of the utility model;

Fig. 3 is a schematic diagram of installation of the utility model;

Fig. 4 is a structural schematic diagram of a circular spring contact finger;

Fig. 5 is A-A sectional view of Fig. 4;

Fig. 6 is the structural representation of guide ring;

Fig. 7 is a B-B sectional view of Fig. 6 .

Detailed ways

Figure 1 is a schematic diagram of the original small electric connection device; wherein 1, the pressure equalizing cover, 2, the solid spring contact finger similar to 3, 3, the ordinary spring that tightens the spring contact finger, 4, 5, the bolts and the fixed pressure equalizing cover Spring gasket, 6. cavity-shaped contact seat, 7. T-shaped bolt hole, 8. conductive rod of pot insulator;

Labels among Fig. 2～Fig. 7: 9, circular spring contact finger, 10 square guide ring, 11, hexagon socket head cylindrical bolt, 12, circular flat washer, 13, spring washer.

Figure 1 is a schematic diagram of the original small electric connection device; including a pressure equalizing cover 1, a solid spring contact finger 2 similar to a 3 shape, two ordinary springs 3, a bolt 4 and a spring washer 5, a cavity-shaped contact seat 6 and a T-shaped bolt hole 7. Among them, the 3-shaped solid spring contact finger is inserted into the slot outside the cavity-shaped contact seat 6, and after two ordinary springs 3 are tightly fitted to the spring contact finger 2, the pressure equalizing cover 1 is buckled on the spring contact finger Finally, the bolt 4 and the spring washer 5 are used to fix the pressure equalizing cover on the contact seat 6. Since there are as many as 28 spring contacts in this scheme, and the contact seat and the spring contact fingers are made of brass, each The spring contacts are all solid and silver-plated on the surface, so the cost is very high; and the assembly is also very difficult, and special tools must be used to assemble. When assembling, several spring contacts must be placed in the slot outside the contact seat and put it on with a hard spring 3 so that it will not fall off, and then insert the rest of the spring contacts between the spring and the contact slot one by one, which is more difficult and cumbersome. After the spring contacts are full, use them again. It is very laborious to put the other spring 3 on the spring finger with one tooling. If there is no tooling, it will be more troublesome to install the spring finger. After the spring finger is installed, buckle the pressure equalizing cover on the spring finger, and then put the The pre-screwed bolts on the contact seat are loosely passed through the pressure equalizing cover, and can only be completed when they are leveled with the pressure equalizing cover. Therefore, the original small electric connection device not only wastes materials, but also takes time and effort to install, and is in urgent need of improvement.

Figure 2 is a schematic structural view of the utility model, which only includes spring contact fingers 9, guide ring 10, cavity-shaped contact seat 6 and T-shaped bolt hole 7, wherein the spring contact finger is improved to a circular spring contact finger, and the cavity-shaped contact seat There is a positioning card slot for installing the circular spring contact finger inside, and a guide ring positioning card slot is also provided at the end connected to the conductive rod. The circular spring contact finger and the guide ring are placed in the corresponding positioning in the cavity-shaped contact seat. card slot.

The cavity-shaped contact seat is made of aluminum rod material, which is easy to obtain and has very good conductivity. The cost is lower than that of copper. The surface of the positioning card groove of the circular spring contact finger and the contact surface connected with the zinc oxide valve plate are plated with silver, which further increases the conductivity.

The circular spring contact finger is wound by a strip spring with good conductivity. The surface of the spring is silver-plated, and its cross-section is oval. When installed, the opposite direction of rotation is embedded in the positioning slot in the cavity-shaped contact seat. , The circular spring contact finger is made of beryllium bronze with good elasticity and toughness, which can effectively contact the conductive rod and ensure the flow capacity. Better maintain contact and ensure flow capacity.

The guide ring is a circular structure made of wear-resistant insulating material, and its cross section is square. The guide ring is made of polytetrafluoroethylene rod, which is wear-resistant. When the guide ring is inserted into the contact seat, no metal debris and falling Falling metal powder can avoid destroying the electric field.

The positioning groove for installing the spring contact finger in the cavity-shaped contact seat is V-shaped, and the bottom is arc-shaped. The V-shaped angle matches the ellipticity of the spring contact finger, ensuring good contact between the spring contact finger and the contact seat. The matched size and silver-plated surface ensure the good flow of current.

The positioning slot for installing the guide ring in the cavity-shaped contact seat is a square shape matching the cross section of the guide ring.

When assembling the small electrical connection device, you only need to install the two circular spring contacts in the two V-shaped positioning grooves of the contact seat in opposite directions, and then place the guide ring in the outermost square positioning groove That's it, no tooling is needed, no difficulty, and the assembly is very fast.

Figure 2 is a schematic diagram of the installation of the utility model. The main function of the small electrical connection device is to ensure the effective connection between the zinc oxide valve plate and the conductive rod fixed on the basin insulator, and at the same time, the current that the small electrical connection device can pass can meet the operation requirements of the arrester. When work needs.

The main function of the small electrical connection device is to ensure the effective flow of current, so it must be ensured that the contact is good during installation. First, the circular flat washer 12, the spring washer 13, and the hexagon socket head bolt 11 are passed through the T of the contact seat 6. Shaped bolt holes 7, the small electrical connection device is fastened on the end surface of the zinc oxide valve plate in contact with it through bolts 11; on the other side, the conductive rod 8 on the pot insulator enters the contact seat through the accurate positioning of the guide ring 10 6, and tightly press the two circular spring fingers 9 to ensure that the two spring fingers 9 can be in good contact with the conductive rod 8. Made of beryllium bronze to meet flow requirements.

The fixing between the small electrical connection device and the zinc oxide valve plate is fixed by hexagonal cylindrical bolts 11, and the upper and lower connections require coaxial alignment, so the bolt fixing position must be on the center line of the small electrical connection device and the zinc oxide valve plate In addition, considering the distribution of the electric field at the high-voltage end, the outer surface of the small electrical connection device should be smooth, so the outer surface of the contact seat 6 adopts a smooth transition; the interface position between the small electrical connection device and the conductive rod is positioned and protected by a guide ring 10, which can Prevent metal powder falling off due to friction during installation.

Figure 3 is a structural schematic diagram of the spring contact finger, and Figure 4 is the A-A cross-sectional view of Figure 3. The spring contact finger is a circular spring made of beryllium bronze with good elasticity and toughness, which can effectively contact the conductive rod and ensure the flow capacity

Figure 5 is a schematic structural view of the guide ring, and Figure 6 is a cross-sectional view of B-B in Figure 5. The guide ring is made of polytetrafluoroethylene rods, which are smooth and wear-resistant, which is conducive to the installation of conductive rods and will not produce metal debris.

Through the static contact design of double circular spring fingers and the use of insulating material guide ring to ensure the positioning function of the conductive rod, the effective connection between the zinc oxide valve plate and the conductive rod fixed on the pot insulator is guaranteed, and the electric field is guaranteed The uniform distribution of the utility model finally achieves the purpose of reliable connection, and can withstand the current requirement when the arrester operates, and has low cost and convenient installation.

In addition to being used for internal connection and conduction of lightning arresters, the utility model can also be extended and applied to the connection and conduction of conductive parts of high-voltage electrical appliances with a voltage below 220kV.

Claims (6)

1, a kind of little arrangements of electric connection, comprise grading shield, spring touch finger, common spring, bolt, spring shim, cavity shape touch base and tommyhead bolt hole, wherein, spring touch finger is the solid copper material fingertip of similar 3 shapes, the dozens of spring touch finger is inserted in the outer draw-in groove of cavity shape touch base, after grading shield is buckled on the spring touch finger, again with two spring parcel fingertips, make it to become a circle, install grading shield additional at outermost layer again, and use bolt, spring shim is fastening, it is characterized in that: include only spring touch finger, guide ring, cavity shape touch base and tommyhead bolt hole, wherein, spring touch finger is improved to the coil component spring fingertip, be provided with the locating groove that the coil component spring fingertip is installed in the cavity shape touch base, the end that itself and contact rod join also is provided with the guide ring locating groove, and coil component spring fingertip and guide ring are placed in the interior corresponding locating groove of cavity shape touch base.

2, according to the described little arrangements of electric connection of claim 1, it is characterized in that: described cavity shape touch base adopts the aluminium bar material, and silver-plated with the contact-making surface that links to each other with zinc oxide valve plate on its locating groove surface that coil component spring fingertip is installed.

3, according to the described little arrangements of electric connection of claim 1, it is characterized in that: described coil component spring fingertip is formed by the good bar-spring coiling of conduction, the spring electroplate, and its cross section is oval, during installation, what rotation direction was opposite is inlaid in the interior locating groove of cavity shape touch base.

4, according to the described little arrangements of electric connection of claim 1, it is characterized in that: described guide ring is the circular configuration with the abrasion-proof insulating material, and its cross section is square.

5, according to claim 1 or 3 described little arrangements of electric connections, it is characterized in that: the locating groove of mounting spring fingertip is a V-arrangement in the described cavity shape touch base, and the bottom is a circular arc, and the ovality of V-arrangement angle and spring touch finger is complementary.

6, according to claim 1 or 4 described little arrangements of electric connections, it is characterized in that: the locating groove that guide ring is installed in the described cavity shape touch base for the guide ring cross section be complementary square.

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