CN116525229A - Lightning protection structure and transformer with same - Google Patents

Abstract

The invention discloses a lightning protection structure and a transformer comprising the same, which comprises two groups of end covers, insulating sleeves, a base and wiring terminals, wherein resistors, copper sheets and connecting rods are arranged between the two groups of end covers, concave rings are arranged on the surfaces of the end covers, grooves are arranged on the surfaces of the copper sheets, protruding blocks inserted into the grooves are arranged on the surfaces of the resistors, the insulating sleeves are sleeved on the surfaces of the end covers and clamped into the concave rings, the base and the wiring terminals are connected with the corresponding end covers, the lightning protection structure is pre-installed on a transformer body through insulating frames, the installation efficiency is improved, the copper sheets are utilized to carry out reinforcing connection on two adjacent groups of resistors, the protruding blocks on the surfaces of the resistors are inserted into the grooves on the surfaces of the copper sheets, so that the structure is more stable after the resistor groups of resistors are connected, the problem of loosening of the resistors is not easy to occur, the lightning protection structure is ensured to be more reliable in use, the insulating sleeves are more stable after being fixed by the insulating sleeves are fixed by fixing rings, the insulating structures are not easy to loosen after being used for a long time, and the insulating performance is stable.

Description

A lightning protection structure and a transformer containing the structure

technical field

The invention relates to the technical field of transformers, in particular to a lightning protection structure and a transformer containing the structure.

Background technique

In the prior art, the transformer is generally equipped with a zinc oxide lightning arrester with a composite jacket, and the lightning arrester is installed on an outdoor power transmission line. When an abnormal high voltage appears on the transmission line due to lightning, the arrester will conduct due to the high voltage, and use the ground wire connected to the arrester to guide the high voltage to the ground, thereby protecting the transformer.

In related technologies, commonly used 10kV transformers are usually equipped with three sets of arresters. The three sets of arresters are first fixed on the same bracket, and then the bracket is fixed on the pole through hoops, screws and nuts, and then the high-voltage lines, arresters, and transformers are used The wires are communicated with the supporting screws to realize the connection between the lightning arrester and the transformer. The lightning arrester is made of zinc oxide into a round block and then stacked together, and the corresponding fixed structure is used to prevent loosening. The insulating rubber sleeve is wrapped outside the zinc oxide block for insulation, and the characteristics of the zinc oxide material are used for lightning protection.

The installation of this kind of transformer and lightning arrester needs to be carried out step by step by the staff. From the high place to the low place of the utility pole, the brackets, hoops, transformer mounting seats and other parts and supporting tools are installed in sequence, and then the lightning arrester and transformer are fixed. For the connection of wires, there are many steps and tools and parts used in the installation process, and the installation speed is slow; the zinc oxide blocks directly stacked together lack a connection structure, and a certain zinc oxide block is easy to move when it is shaken, which affects the performance of the arrester. , The insulating rubber sleeve is sealed by the elasticity of the rubber, and its sealing performance is not stable enough. When the rubber is aging, it is prone to the problem of reduced insulation performance.

Contents of the invention

The object of the present invention is to provide a lightning protection structure and a transformer containing the structure, so as to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the present invention provides the following technical solutions: a lightning protection structure, including two sets of end caps, resistors, copper sheets and connecting rods are arranged between the two sets of end caps, and the resistors and copper sheets are arranged in a staggered manner , the resistor is made of zinc oxide material, the surface of the end cap is provided with a concave ring, the surface of the copper sheet is provided with a groove, and the surface of the resistor is provided with a bump inserted into the groove, so that the resistor can be It is fixed by copper sheets, thereby improving the stability of the arrester structure;

An insulating sleeve, the insulating sleeve is sleeved on the surface of the end cover and snapped into the inside of the concave ring, the insulating sleeve is arranged in the shape of a bellows and is made of rubber material;

The base and the terminal are connected with the corresponding end cover.

Further, the surface of the end cover is provided with a concave hole, and the inner wall of the concave hole is provided with an orifice plate, the connecting rod passes through the orifice plate, the connecting rod is provided with threads, and the surface of the connecting rod is screwed with a locking cap, Control two sets of end cap clamping resistors when tightening the locking cap.

Further, a reinforcing ring is sleeved on the surface of the insulating sleeve, and the reinforcing ring is located outside the concave ring, and cooperates with the concave ring to clamp the insulating sleeve.

Further, the surface of the base is provided with three sets of fixing holes, and the surface of the terminal is provided with four sets of wiring holes.

Further, fixing bolts are inserted into the surfaces of the base and the terminals, and the fixing bolts are screwed to the corresponding end covers to complete the fixing of the base and the terminals.

Further, a connection groove is provided in the middle of the surface of the end cover, and the resistor is placed inside the connection groove to improve the stability of the connection between the resistor and the end cover.

The present invention also provides a transformer, which includes the above lightning protection structure.

The transformer also includes a transformer body. The upper surface of the transformer body is provided with an insulating frame. The insulating frame is arranged in an n shape to keep a certain distance between the transformer body and the lightning protection structure. The base is installed on the surface of the insulating frame. The threaded rod passes through the fixing hole on the surface of the base, and then is fixed with a nut, and the terminal is electrically connected with the transformer body.

Further, the upper surface of the transformer body is provided with three sets of binding posts, a first wire is provided between the binding post and the terminal, a second wire is provided on the surface of the terminal, a ground wire is provided on the surface of the base, The lightning protection structure is connected in series through the ground wire, and the ground wire is grounded.

Compared with the prior art, the beneficial effect of the present invention is that: the present invention uses copper sheets to reinforce and connect two adjacent groups of resistors, and the bumps on the surface of the resistors are inserted into the grooves on the surface of the copper sheets, so that multiple sets of resistors After the resistor is connected, the structure is more stable, and the problem of loose resistors is not easy to occur, ensuring that the lightning protection structure is more reliable;

The insulating sleeve has elasticity and can be snapped into the concave ring, thereby improving the stability of the connection between the insulating sleeve and the end cover. The insulating sleeve is not easy to fall off from the end cover. The reinforcing ring tightly hugs the insulating sleeve on the concave ring. Stable, long-term use is not easy to loosen, and the insulation performance is stable;

The lightning protection structure is pre-installed on the transformer body through an insulating frame, and is connected with the first wire. During the installation process, as long as the transformer body is fixed, there is no need to install the lightning protection structure, which simplifies the safety steps and tools used, and improves The installation efficiency of the transformer body.

Description of drawings

Fig. 1 is the sectional view of lightning protection structure of the present invention;

Fig. 2 is the structural representation that resistor of the present invention is connected with copper sheet;

Fig. 3 is the structural representation that end cap of the present invention is connected with orifice plate;

Fig. 4 is a structural schematic diagram of the connection between the transformer body and the lightning protection structure of the present invention.

In the figure: 1. End cover; 2. Insulation sleeve; 3. Reinforcing ring; 4. Concave ring; 5. Resistor; 6. Copper sheet; 7. Terminal; 8. Fixing bolt; 9. Connecting rod; 10. Orifice plate; 11, bump; 12, groove; 13, concave hole; 14, locking cap; 15, connecting groove; 16, transformer body; 17, insulating frame; 18, terminal post; 19, first wire; 20. Second wire; 21. Ground wire; 22. Base.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figures 1-4, the present invention provides a technical solution: a lightning protection structure, including two sets of end caps 1, resistors 5, copper sheets 6 and connecting rods 9 are arranged between the two sets of end caps 1 , the connecting rod 9 is made of insulating material, engineering plastics or glass fiber can be used, the connecting rod 9 connects the two sets of end caps 1, clamps the resistor 5 and the copper sheet 6, and the surface of the end cap 1 is provided with Concave ring 4, the surface of the copper sheet 6 is provided with a groove 12, and the surface of the resistor 5 is provided with a bump 11 inserted into the groove 12 to prevent the resistor 5 from loosening and improve the integrity of the lightning protection structure;

Insulating sleeve 2, the insulating sleeve 2 is sleeved on the surface of the end cover 1 and snapped into the inside of the concave ring 4, the arc groove on the surface of the concave ring 4 can clamp the insulating sleeve 2, which is beneficial to improve the distance between the insulating sleeve 2 and the end cover 1 interstitial stability;

The base 22 and the terminal 7 are connected to the corresponding end cover 1 .

The surface of the end cover 1 is provided with a concave hole 13, and the inner wall of the concave hole 13 is provided with an orifice 10, the concave hole 13 makes the orifice 10 not protrude from the end cover 1, and the connecting rod 9 runs through the orifice 10, The connecting rod 9 is provided with threads, and the surface of the connecting rod 9 is screwed with a locking cap 14. When the locking cap 14 is tightened, the locking cap 14 squeezes the two groups of end caps 1 to approach each other, and then clamps the resistor 5 .

As shown in Figure 1, the surface of the insulating sleeve 2 is sleeved with a reinforcing ring 3, the reinforcing ring 3 is located outside the concave ring 4, and cooperates with the concave ring 4 to complete the fixing of the insulating sleeve 2, so as to prevent the insulating sleeve 2 from contacting the concave ring 4. separate.

The surface of the base 22 is provided with three sets of fixing holes for connecting with the insulating frame 17, and the surface of the terminal 7 is provided with four sets of wiring holes for installing wires.

As shown in FIG. 1 , a fixing bolt 8 is inserted into the surface of the base 22 and the terminal 7 , and the fixing bolt 8 is screwed to the corresponding end cover 1 , and the surface of the end cover 1 has a screw hole matching the fixing bolt 8 .

A connection groove 15 is provided in the middle of the surface of the end cover 1 , and the resistor 5 is placed inside the connection groove 15 to limit the sliding of the resistor 5 on the end cover 1 .

The present invention also provides a transformer, which includes the above lightning protection structure.

The transformer also includes a transformer body 16, the upper surface of the transformer body 16 is provided with an insulating frame 17, the base 22 is installed on the surface of the insulating frame 17, the insulating frame 17 has a threaded rod that can pass through the base 22, and then is fixed with a nut , the terminal 7 is electrically connected to the transformer body 16 .

As shown in Figure 4, the upper surface of the transformer body 16 is provided with three groups of terminal posts 18, a first lead 19 is provided between the terminal post 18 and the terminal 7, and a second lead 20 is provided on the surface of the terminal 7. , the second wire 20 is connected to the high voltage line, the surface of the base 22 is provided with a ground wire 21, and the ground wire 21 is connected to the ground.

Specifically, during use, the resistor 5 and the copper sheet 6 are sequentially spliced so that the bump 11 on the surface of the resistor 5 is inserted into the groove 12 on the surface of the copper sheet 6, and the resistor 5 is raised by using the bump 11 and the groove 12. The stability of the connection avoids the local resistor 5 from loosening. Place the resistor 5 in the two sets of end caps 1, connect the connecting rod 9 through the orifice plate 10, screw the locking cap 14 to the connecting rod 9, and the locking cap 14 Hold against the orifice plate 10 when tightening, apply an external force to the orifice plate 10, and then drive two sets of end caps 1 to clamp the resistor 5, put the elastic insulating sleeve 2 on the concave ring 4 on the surface of the end cap 1, and then the insulating sleeve 2 Reinforcement ring 3 is used for external reinforcement, and then fixed bolt 8 is used to connect the base 22 and terminal 7 with the corresponding end cover 1;

Use the three sets of fixing holes on the surface of the base 22 to connect with the three sets of threaded rods on the surface of the insulating frame 17. The wire nose of the ground wire 21 is set on the threaded rods, and then use nuts and threaded rods to connect the base 22 and the ground wire 21. Fixed, the terminal 18 on the surface of the transformer body 16 is connected to the terminal 7 by a first wire 19, the first wire 19 is fixed in the wiring hole on the surface of the terminal 7, and the lower end of the second wire 20 is fixed in a different wiring hole. When the transformer body 16 is installed, the ground wire 21 is connected to the ground, and the second wire 20 is connected with the high-voltage line, so as to prevent the staff from installing the lightning protection structure again and speed up the installation speed.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (9)

1. A lightning protection structure, comprising:

the novel high-voltage transformer comprises two groups of end covers (1), wherein a resistor (5), a copper sheet (6) and a connecting rod (9) are arranged between the two groups of end covers (1), a concave ring (4) is arranged on the surface of the end cover (1), a groove (12) is formed in the surface of the copper sheet (6), and a lug (11) inserted into the groove (12) is arranged on the surface of the resistor (5);

the insulation sleeve (2) is sleeved on the surface of the end cover (1) and is clamped into the concave ring (4);

the base (22) and the wiring terminal (7), and the base (22) and the wiring terminal (7) are connected with the corresponding end cover (1).

2. A lightning protection structure according to claim 1 wherein: the novel connecting rod is characterized in that a concave hole (13) is formed in the surface of the end cover (1), a pore plate (10) is arranged on the inner wall of the concave hole (13), the connecting rod (9) penetrates through the pore plate (10), the connecting rod (9) is provided with threads, and a locking cap (14) is screwed on the surface of the connecting rod (9).

3. A lightning protection structure according to claim 1 wherein: the surface of the insulating sleeve (2) is sleeved with a reinforcing ring (3), and the reinforcing ring (3) is positioned outside the concave ring (4).

4. A lightning protection structure according to claim 1 wherein: three groups of fixing holes are formed in the surface of the base (22), and four groups of wiring holes are formed in the surface of the wiring terminal (7).

5. A lightning protection structure according to claim 4 wherein: the surface of the base (22) and the surface of the wiring terminal (7) are respectively inserted with a fixing bolt (8), and the fixing bolts (8) are in threaded connection with the corresponding end covers (1).

6. A lightning protection structure according to claim 1 wherein: the middle part of the surface of the end cover (1) is provided with a connecting groove (15), and the resistor (5) is arranged in the connecting groove (15).

7. A transformer, characterized in that: the transformer comprising the lightning protection structure of any one of claims 1-6.

8. A transformer according to claim 7, wherein: the transformer is characterized by further comprising a transformer body (16), wherein an insulating frame (17) is arranged on the upper surface of the transformer body (16), the base (22) is arranged on the surface of the insulating frame (17), and the wiring terminal (7) is electrically connected with the transformer body (16).

9. A transformer according to claim 8, wherein: the transformer is characterized in that three groups of wiring posts (18) are arranged on the upper surface of the transformer body (16), a first lead (19) is arranged between each wiring post (18) and each wiring terminal (7), a second lead (20) is arranged on the surface of each wiring terminal (7), and a ground wire (21) is arranged on the surface of the base (22).