Efficient and convenient conductive copper sleeve

Abstract

The utility model relates to the technical field of conductive copper bushes, in particular to an efficient and convenient conductive copper bush. Comprising a hollow columnar regular polygon fixing sleeve, a first pipe opening, a third pipe opening, an annular plate and a Haff positioning sleeve, wherein the first pipe opening and the third pipe opening are formed in the two ends of the regular polygon fixing sleeve respectively; the annular plate is coaxially arranged in the regular polygon fixing sleeve and located between the first pipe opening and the third pipe opening; the connecting seats are integrally formed with the two ends of the upper side of the Haff positioning sleeve respectively, and the two bolts are arranged on the two connecting seats at intervals. A second pipe opening is formed in the Haff positioning sleeve and the interiors of the two connecting bases. The conductive copper sleeve adopts a connection mode that one end is welded and the other end is fastened by a bolt, single-person installation is realized through a countersunk groove, and double-sealing leakage prevention is realized; the regular polygon fixing sleeve and the Haff positioning sleeve are integrally formed, the process is simplified, and cost is reduced; the stepped inner cavity improves the cooling efficiency, and the prestress release groove reduces the contact resistance, thereby achieving the optimization of the conductivity.

Description

A high-efficiency and convenient conductive copper sleeve Technical Field

[0001] This utility model relates to the field of conductive copper sleeve technology, specifically a high-efficiency and convenient conductive copper sleeve. Background Technology

[0002] In the electric arc furnace industry, the component connecting the secondary output terminal of the transformer to the conductive short network is called a conductive copper bushing, also known as a water-cooled compensator. The development history of water-cooled compensators is closely related to the evolving needs of various industrial applications. Early water-cooled compensators had relatively complex structures and were mainly used to solve basic vibration and displacement compensation problems. However, with the continuous advancement of industrial technology, especially in applications such as electric arc furnaces, higher requirements have been placed on the performance and functionality of water-cooled compensators.

[0003] The existing water-cooled compensators for electric arc furnaces have the following shortcomings: First, some water-cooled compensators use a nut and hoop tight connection, which makes the installation process cumbersome, requires multiple workers to operate together, and is prone to leakage at the flange connection after long-term use; Second, the manufacturing cost of water-cooled compensators is relatively high, and the processing technology is relatively complex; Third, the existing water-cooled compensators mostly use a multi-strand stranded wire structure inside, which limits the water flow rate, thereby affecting the cooling effect and conductivity. Summary of the Invention

[0004] The purpose of this invention is to provide a high-efficiency and convenient conductive copper sleeve to solve the problems of cumbersome installation of existing water-cooled compensators for submerged arc furnaces, such as the tight connection of nuts and stirrups, the need for multiple operators, and the easy leakage of flanges; high manufacturing cost and complex processing technology; and the internal multi-strand stranded wire structure that hinders water flow and reduces cooling and conductivity.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency and convenient conductive copper sleeve, comprising a hollow cylindrical regular polygonal fixing sleeve, a first and a third tube opening respectively disposed at both ends of the regular polygonal fixing sleeve, an annular plate coaxially disposed within the regular polygonal fixing sleeve and located between the first and third tube openings, a half-positioning sleeve integrally formed with one end of the regular polygonal fixing sleeve, connecting seats integrally formed with both ends of the upper side of the half-positioning sleeve, and two bolts disposed on the two connecting seats and spaced apart; the interior of the half-positioning sleeve and the two connecting seats forms a second tube opening; the central axes of the first, second, and third tube openings and the annular plate coincide; the diameters of the second and third tube openings are the same and both smaller than the diameter of the first tube opening; the inner diameter of the annular plate is smaller than the diameters of the first, second, and third tube openings.

[0006] Furthermore, a vibration absorption groove is provided at the connection between the regular polygonal fixing sleeve and the half positioning sleeve, and the vibration absorption groove is distributed circumferentially in the axial top region of the connection.

[0007] Furthermore, the inner wall of the half positioning sleeve is provided with a prestress relief groove, which is located in the axial bottom region of the inner wall of the half positioning sleeve.

[0008] Furthermore, the inner wall of the third port is provided with an annular groove for installing a seal.

[0009] Furthermore, the outer side of the connecting seat is provided with two countersunk grooves spaced apart, and the inside of the countersunk grooves is provided with through holes that cooperate with bolts.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] This utility model's conductive copper sleeve employs a connection method where one end is welded and the other end is secured with bolts and stirrups. The first pipe opening is rigidly fixed to the short copper mesh pipe by welding, and the half-positioning sleeve end utilizes a countersunk groove to achieve embedded positioning of the bolt head. Installation can be completed by a single person without the need for multiple people to work together, significantly simplifying the assembly process compared to the traditional nut and stirrup tight connection. At the same time, the connection adopts a double sealing structure, which can withstand 50MPa water pressure for a long time without leakage, solving the problem of easy water leakage in flange connections.

[0012] The regular polygonal fixing sleeve and the half positioning sleeve in this utility model adopt an integral molding process, abandoning the traditional multi-strand stranded wire structure, and replacing the complex winding process with a hollow columnar inner cavity combined with a ring plate guide design, which simplifies the processing technology and reduces manufacturing costs.

[0013] The conductive copper sleeve of this invention adopts a stepped internal cavity structure (the diameter of the first pipe opening is larger than that of the second and third pipe openings), which reduces water flow resistance and improves cooling efficiency. At the same time, the prestress relief groove in the half positioning sleeve releases assembly stress, making the inner surface fit tightly with the transformer output terminal, further reducing contact resistance and thus improving conductivity. Attached Figure Description

[0014] Figure 1 is a schematic diagram of the structure of the efficient and convenient conductive copper sleeve of this utility model;

[0015] Figure 2 is a schematic cross-sectional view of the assembly of the efficient and convenient conductive copper sleeve of this utility model.

[0016] Figure 3 is a side cross-sectional schematic diagram of the half positioning sleeve of this utility model.

[0017] Figure 4 is a cross-sectional schematic diagram of the efficient and convenient conductive copper sleeve of this utility model.

[0018] Figure 5 is a side cross-sectional schematic diagram of the half positioning sleeve of this utility model.

[0019] Figure 6 is a side cross-sectional view of the regular polygonal fixing sleeve of this utility model.

[0020] In the diagram: 1. Regular polygonal fixing sleeve; 2. First pipe opening; 3. Ring plate; 4. Annular groove; 5. Half positioning sleeve; 6. Connecting seat; 7. Countersunk groove; 8. Perforation; 9. Prestress release groove; 10. Vibration absorption groove; 11. Second pipe opening; 12. Third pipe opening; 13. Transformer secondary output terminal; 14. Bolt; 15. O-ring; 16. Sealing gasket; 17. Short copper wire mesh pipe. Detailed Implementation

[0021] Please refer to Figures 1-6. A high-efficiency and convenient conductive copper sleeve includes a hollow cylindrical regular polygonal fixing sleeve 1, a first port 2 and a third port 12 respectively located at both ends of the regular polygonal fixing sleeve 1, an annular plate 3 coaxially connected inside the regular polygonal fixing sleeve 1 and located between the first port 2 and the third port 12, a half-positioning sleeve 5 integrally formed with one end of the regular polygonal fixing sleeve 1, a connecting seat 6 integrally formed with both ends of the upper side of the half-positioning sleeve 5, and two bolts 14 arranged at intervals on the two connecting seats 6; the interior of the half-positioning sleeve 5 and the two connecting seats 6 forms a second port 11; the central axes of the first port 2, the second port 11, the third port 12 and the annular plate 3 coincide; the diameters of the second port 11 and the third port 12 are the same and both smaller than the diameter of the first port 2; the inner diameter of the annular plate 3 is smaller than the diameters of the first port 2, the second port 11 and the third port 12.

[0022] A vibration absorption groove 10 is provided at the connection between the regular polygonal fixing sleeve 1 and the half positioning sleeve 5. The vibration absorption groove 10 is distributed circumferentially in the axial top area of ​​the connection. The vibration absorption groove 10 reduces the vibration transmission efficiency and blocks the transmission path of vibration to the secondary output terminal 13 of the transformer. Since the transformer oil seal is sensitive to vibration, long-term vibration can easily lead to wear and oil leakage of the oil seal. The vibration absorption groove 10 reduces the vibration input at the transformer end and extends the service life of the oil seal.

[0023] The inner wall of the half-positioning sleeve 5 is provided with a prestress relief groove 9, which is located in the axial bottom region of the inner wall of the half-positioning sleeve 5. Through the prestress relief groove 9, an elastic deformation zone is formed on the inner wall of the half-positioning sleeve 5, which can release the prestress generated during assembly when the bolt 14 is tightened, allowing the inner surface of the half-positioning sleeve 5 to achieve a uniform circumferential fit with the secondary output terminal 13 of the transformer, reducing contact resistance. At the same time, the presence of the prestress relief groove 9 enhances the structural flexibility of the half-positioning sleeve 5, enabling it to adaptively compensate for changes in the fitting clearance caused by thermal expansion and contraction or vibration, maintaining long-term stable electrical conductivity under the conditions of frequent start-up and shutdown of the electric arc furnace.

[0024] The inner wall of the third port 12 is provided with an annular groove 4 for installing the seal. The annular groove 4 provides positioning and installation space for the sealing gasket 16, and the elastic deformation of the sealing gasket 16 compensates for minor machining errors at the interface, reducing the risk of water seepage and leakage.

[0025] The outer side of the connector 6 is provided with two countersunk grooves 7 spaced apart. The inside of the countersunk grooves 7 is provided with through holes 8 that mate with the bolts 14. The countersunk grooves 7 provide embedded installation space for the bolt heads. By increasing the contact area between the bolts 14 and the connector 6, the bolt heads are prevented from loosening or slipping under vibration, thereby improving the connection stability between the half-positioning sleeve 5 and the secondary output terminal 13 of the transformer.

[0026] Working process and principle: During installation, the first port 2 of the regular polygonal fixing sleeve 1 is rigidly connected to the short copper wire tube 17 by welding. An O-ring 15 is installed inside the third port 12 near the ring plate 3, and a sealing gasket 16 is embedded in the annular groove 4 on the inner wall to form a double sealing structure, ensuring no water seepage or leakage when subjected to 50MPa water pressure for a long time. The second port 11 of the half positioning sleeve 5 is connected to the transformer secondary output terminal 13 by two bolts 14 through the countersunk groove 7 and through hole 8 of the connecting seat 6 to form a bolted hoop tight connection. This structure achieves uniform transmission of fastening force by embedding and positioning the bolt head in the countersunk groove 7.

[0027] During operation, current is input through the first port 2 and guided by the ring plate 3 to the second port 11. Since the inner diameter of the ring plate 3 is smaller than the diameters of the first port 2, the second port 11, and the third port 12, a cross-sectional contraction effect is created, optimizing the current distribution path within the conductive copper sleeve and reducing eddy current losses. The prestress relief groove 9 at the bottom of the inner wall of the half-positioning sleeve 5 releases the assembly stress generated during bolt 14 tightening, ensuring a tight fit between the inner surface of the second port 11 and the secondary output terminal 13 of the transformer, reducing contact resistance and improving conductivity reliability.

[0028] The vibration absorption grooves 10 distributed circumferentially at the top of the connection between the regular polygonal fixing sleeve 1 and the half positioning sleeve 5 absorb the vibration energy generated during the operation of the short network through their own elastic deformation, blocking the transmission path of vibration to the transformer end, avoiding damage to the transformer oil seal by vibration, and extending the service life of the oil seal. In addition, the diameter of the first pipe opening 2 is larger than that of the second pipe opening 11 and the third pipe opening 12, forming a stepped inner cavity structure, which can reduce the flow resistance of the cooling medium and increase the water flow rate. Combined with the double sealing design of the sealing gasket 16 and the O-ring 15 in the annular groove 4, the conductivity efficiency and cooling performance are synergistically optimized to meet the stable operation requirements of the electric arc furnace under high load conditions.

[0029] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A highly efficient and convenient conductive copper sleeve, characterized in that, It includes a hollow cylindrical regular polygonal fixing sleeve (1), a first pipe opening (2) and a third pipe opening (12) respectively located at both ends of the regular polygonal fixing sleeve (1), an annular plate (3) coaxially arranged inside the regular polygonal fixing sleeve (1) and located between the first pipe opening (2) and the third pipe opening (12), a half-positioning sleeve (5) integrally formed with one end of the regular polygonal fixing sleeve (1), a connecting seat (6) integrally formed with both ends of the upper side of the half-positioning sleeve (5), and a spaced-apart arrangement on the two connecting seats (6). Two bolts (14) are provided; the interior of the half positioning sleeve (5) and the two connecting seats (6) forms a second pipe opening (11); the central axes of the first pipe opening (2), the second pipe opening (11), the third pipe opening (12) and the ring plate (3) coincide; the diameters of the second pipe opening (11) and the third pipe opening (12) are the same and both are smaller than the diameter of the first pipe opening (2); the inner diameter of the ring plate (3) is smaller than the diameters of the first pipe opening (2), the second pipe opening (11) and the third pipe opening (12).

2. The conductive copper sleeve according to claim 1, characterized in that, The connection between the regular polygonal fixing sleeve (1) and the half positioning sleeve (5) is provided with a vibration absorption groove (10), which is distributed circumferentially in the axial top area of ​​the connection.

3. The conductive copper sleeve according to claim 1, characterized in that, The inner wall of the half positioning sleeve (5) is provided with a prestress release groove (9), which is located in the axial bottom area of ​​the inner wall of the half positioning sleeve (5).

4. The conductive copper sleeve according to claim 1, characterized in that, The inner wall of the third port (12) is provided with an annular groove (4) for installing a seal.

5. The conductive copper sleeve according to claim 1, characterized in that, The outer side of the connecting seat (6) is provided with two countersunk grooves (7) spaced apart, and the inside of the countersunk grooves (7) is provided with through holes (8) that cooperate with bolts (14).

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