Common-box bus expansion joint
By installing a sheath and threaded sleeve on the terminal board of the busbar telescopic section, the nut is protected from oxidative rust, and the problem of easy rust on the fixing bolt in the prior art is solved, achieving convenience of replacement and convenience of maintenance.
Patent Information
- Application Number
- CN202420591111.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-26
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-03-26
AI Technical Summary
During the long-term use of existing busbar telescopic joints, the exposed fixing bolts on the terminal block are prone to oxidation and corrosion, which makes it difficult to remove the bolts and affects the staff's replacement of the telescopic joints.
A common box busbar telescopic joint is designed to protect the first nut by setting a sheath on the terminal block. The sheath is removably connected to the terminal block and bolt connection to avoid oxidative rust, and is passed through threaded sleeves and fastening nuts. The design ensures the convenience of disassembly and assembly.
It effectively prevents oxidative rust of the nut, simplifies the disassembly and assembly process of the bolts, and improves the staff's maintenance and replacement efficiency of telescopic joints.
Smart Images
Figure CN222147108U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electrical connection, in particular to a common box busbar expansion joint. Background Art
[0002] The busbar expansion joint is a telescopic connector that compensates for the deformation and vibration deformation of the busbar caused by temperature changes. It has a wide range of applications and plays an important role in ensuring the stable operation of equipment and improving system reliability. In electrical engineering, it is mainly used to compensate for the length change of the busbar caused by temperature changes to maintain the stability and reliability of the busbar.
[0003] The Chinese patent with application number CN201520461594.6 discloses a special-shaped busbar expansion joint, including an arc-shaped connector and a copper fixing piece 1 and a copper fixing piece 2 arranged at both ends of the arc-shaped connector, wherein the fixing piece 1 is a square and the fixing piece 2 is a parallelogram. The special-shaped busbar expansion joint has a simple structure and can effectively reduce the stress received by the cable head and the busbar, thereby ensuring the safe operation of the busbar. During installation, the copper fixing pieces at both ends of the arc-shaped connector will be fixed to the terminals of the busbar through a terminal board, and a fixing bolt is installed on the terminal board. During long-term use, the bolt cap exposed on the outside of the fixing bolt will be oxidized and rusted, and it is difficult to remove the bolt, which affects the replacement of the expansion joint by the staff. Summary of the invention
[0004] In view of the above problems, the utility model proposes a common-box busbar expansion joint to solve the shortcomings of the existing busbar expansion joint that during long-term use, the exposed fixing bolts on the terminal board will oxidize and rust, making it difficult to remove the bolts, affecting the staff's replacement of the expansion joint.
[0005] To achieve the purpose of the utility model, the utility model is implemented by the following technical solutions: a common box busbar expansion joint, including a expansion connector, two ends of the expansion connector are provided with a terminal block, and the terminal block is equipped with a plurality of bolt fittings for fixing the terminal block;
[0006] The bolt assembly part includes an assembly bolt, a first nut is provided at the upper end of the assembly bolt, the assembly bolt is threadedly connected with an assembly hole provided on the wiring board, and the lower end surface of the first nut contacts the upper end surface of the wiring board;
[0007] A sheath is provided at the upper end of the wiring board, the sheath covers the outer side of each first nut, the sheath is fixed to the upper end of the wiring board through a bolt connector, and the bolt connector is detachably connected to the sheath and the wiring board.
[0008] A further improvement is that the bolt connector includes a mounting bolt and a fastening nut, the mounting bolt is threadedly connected to a bolt hole opened on the terminal block, and each assembly hole surrounds the bolt hole. A second nut is provided at the lower end of the mounting bolt, and the second nut is placed in a groove opened at the lower end of the terminal block. The upper end of the mounting bolt is threadedly connected to the sleeve, and the fastening nut is sleeved on the outside of the mounting bolt and threadedly connected to the mounting bolt, and the fastening nut is placed at the upper end of the terminal block.
[0009] A further improvement is that a threaded sleeve is provided on the inner side of the sleeve, the upper end of the threaded sleeve is fixedly connected to the inner wall of the sleeve, the lower end of the threaded sleeve is sleeved on the outer side of the mounting bolt, and the threaded sleeve is threadedly connected to the mounting bolt.
[0010] A further improvement is that the lower end surface of the sleeve contacts the upper end surface of the fastening nut.
[0011] A further improvement is that two blocking pieces are provided at the upper end of the sheath, and the blocking pieces are fixedly connected to two sides of the sheath.
[0012] A further improvement is that a first gasket is provided between the first nut and the terminal block, the first gasket is sleeved on the outside of the assembly bolt, and a second gasket is provided between the fastening nut and the terminal block, the second gasket is sleeved on the outside of the installation bolt.
[0013] The utility model has the following beneficial effects: the terminal block is fixed to the joint of the two busbars through the assembly bolt, and is used to compensate for the length change of the busbar caused by temperature change. The sheath covering the outside of the first nut can protect the assembly bolt on the terminal block, and prevent the nut on the assembly bolt from rusting. The sheath is detachably connected to the terminal block through the bolt connector, and is convenient for disassembly, assembly and replacement, and easy for maintenance by staff. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural diagram of the telescopic connector in the utility model.
[0015] Figure 2 It is a structural diagram of the wiring board in the utility model.
[0016] Figure 3 It is a cross-sectional view of the wiring board in the utility model.
[0017] Figure 4 This utility model Figure 3 A magnified view of the structure at center.
[0018] Among them: 1. telescopic connector; 2. terminal block; 3. sheath; 4. assembly bolt; 5. baffle; 6. assembly hole; 7. first nut; 8. threaded sleeve; 9. first gasket; 10. mounting bolt; 11. fastening nut; 12. second nut; 13. groove; 14. bolt hole; 15. second gasket. DETAILED DESCRIPTION
[0019] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with an embodiment. The embodiment is only used to explain the present invention and does not constitute a limitation on the protection scope of the present invention.
[0020] according to Figure 1 , 2 As shown in Figures 3 and 4, a busbar expansion joint in a common box is proposed in this embodiment, including a expansion connector 1, with terminal blocks 2 at both ends of the expansion connector 1, and a plurality of bolt fittings for fixing the terminal blocks 2 are mounted on the terminal blocks 2; the material of the expansion connector 1 can be selected according to actual needs, and aluminum and copper are commonly used. The aluminum busbar expansion joint is usually made of 0.5mm aluminum foil folded into the same cross-section as the busbar, and the terminal blocks 2 are welded at both ends.
[0021] The bolt assembly includes an assembly bolt 4, a first nut 7 is provided at the upper end of the assembly bolt 4, the assembly bolt 4 is threadedly connected to the assembly hole 6 opened on the terminal block 2, and the lower end surface of the first nut 7 is in contact with the upper end surface of the terminal block 2; the terminal block 2 is fixed to the joint of the two busbars through the assembly bolt 4, which is used to compensate for the length change of the busbar caused by temperature change.
[0022] In order to prevent the exposed first nuts 7 from being corroded by oxidation and thus affecting the opening of the assembly bolts 4, a sheath 3 is provided at the upper end of the wiring board 2. The sheath 3 covers the outer side of each first nut 7. The sheath 3 is fixed to the upper end of the wiring board 2 through a bolt connector. The bolt connector is detachably connected to the sheath 3 and the wiring board 2. The sheath 3 covering the outer side of the first nuts 7 can protect each assembly bolt 4 on the wiring board 2 and prevent the first nuts 7 from rusting. The sheath 3 is detachably connected to the wiring board 2 through the bolt connector, which is convenient for disassembly, assembly and replacement and easy for maintenance by staff.
[0023] Regarding the bolt connector: the bolt connector includes a mounting bolt 10 and a fastening nut 11. The mounting bolt 10 is threadedly connected to a bolt hole 14 provided on the wiring board 2. Each assembly hole 6 surrounds the bolt hole 14. A second nut 12 is provided at the lower end of the mounting bolt 10. The second nut 12 is placed in a groove 13 provided at the lower end of the wiring board 2. The upper end of the mounting bolt 10 is threadedly connected to the sheath 3. The fastening nut 11 is sleeved on the outside of the mounting bolt 10 and threadedly connected to the mounting bolt 10. The fastening nut 11 is placed at the upper end of the wiring board 2. Before the sheath 3 is fixed to the wiring board 2, the mounting bolt 10 is first screwed into the bolt hole 14 provided at the center of the wiring board 2. The sheath 3 is threadedly connected to the upper end of the mounting bolt 10. The second nut 12 at the lower end of the mounting bolt 10 abuts against the groove 13 provided at the lower end of the wiring board 2. The groove 13 is provided at the lower end of the wiring board 2, and can accommodate the second nut 12 to prevent the wiring board 2 from causing conflict with the wiring board 2 when it is assembled with the bus terminal.
[0024] Specifically, a threaded sleeve 8 is provided inside the sheath 3, the upper end of the threaded sleeve 8 is fixedly connected to the inner wall of the sheath 3, the lower end of the threaded sleeve 8 is sleeved on the outer side of the mounting bolt 10, and the threaded sleeve 8 is threadedly connected to the mounting bolt 10. The sheath 3 is put on the upper end of the wiring board 2, the threaded sleeve 8 inside the sheath 3 is clamped on the upper end of the mounting bolt 10, and the sheath 3 is rotated, and the sheath 3 is tightened on the upper end of the mounting bolt 10 through the threaded sleeve 8.
[0025] It should be noted that the lower end surface of the sheath 3 contacts the upper end surface of the fastening nut 11. After the threaded sleeve 8 is screwed onto the upper end of the mounting bolt 10, the lower end surface of the sheath 3 contacts the upper end surface of the fastening nut 11, and the threaded sleeve 8 squeezes the fastening nut 11 to limit the rotation of the fastening nut 11 and prevent the mounting bolt 10 from loosening.
[0026] In order to facilitate the staff to rotate the sheath 3, two baffles 5 are provided on the upper end of the sheath 3, and the baffles 5 are fixedly connected to both sides of the sheath 3. The baffles 5 fixed on both sides of the sheath 3 can provide assistance to the staff when the staff rotates the sheath 3.
[0027] A first gasket 9 is provided between the first nut 7 and the terminal block 2, and the first gasket 9 is sleeved on the outside of the assembly bolt 4. A second gasket 15 is provided between the fastening nut 11 and the terminal block 2, and the second gasket 15 is sleeved on the outside of the installation bolt 10. The first gasket 9 is provided between the first nut 7 and the terminal block 2, and the second gasket 15 is provided between the fastening nut 11 and the terminal block 2, which can increase the friction between the first nut 7 and the fastening nut 11 and the terminal block 2, share the pressure on the terminal block 2, make the connection between the first nut 7 and the fastening nut 11 more firm, and protect the terminal block 2.
[0028] Working principle: The terminal block 2 is fixed to the joint of the two busbars through the assembly bolts 4 to compensate for the length change of the busbar caused by temperature change. The sheath 3 covering the outside of the first nut 7 can protect the assembly bolts 4 on the terminal block 2 to prevent the first nut 7 from rusting. The sheath 3 is detachably connected to the terminal block 2 through the bolt connector. The split design is convenient for disassembly and replacement, and easy for staff to maintain.
[0029] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A busbar expansion joint in a common box, comprising a expansion connector (1), with terminal blocks (2) provided at both ends of the expansion connector (1), characterized in that: The wiring board (2) is equipped with a plurality of bolt-fitting accessories for fixing the wiring board (2); The bolt assembly comprises an assembly bolt (4), the upper end of the assembly bolt (4) is provided with a first nut (7), the assembly bolt (4) is threadedly connected to an assembly hole (6) provided on the wiring board (2), and the lower end surface of the first nut (7) is in contact with the upper end surface of the wiring board (2); A sheath (3) is provided at the upper end of the wiring board (2), the sheath (3) covers the outer side of each of the first nuts (7), the sheath (3) is fixed to the upper end of the wiring board (2) by a bolt connector, and the bolt connector is detachably connected to the sheath (3) and the wiring board (2).
2. A busbar expansion joint in a common box according to claim 1, characterized in that: The bolt connector comprises a mounting bolt (10) and a fastening nut (11); the mounting bolt (10) is threadedly connected to a bolt hole (14) provided on the wiring board (2); each of the assembly holes (6) surrounds the bolt hole (14); a second nut (12) is provided at the lower end of the mounting bolt (10); the second nut (12) is placed in a groove (13) provided at the lower end of the wiring board (2); the upper end of the mounting bolt (10) is threadedly connected to the sheath (3); the fastening nut (11) is sleeved on the outside of the mounting bolt (10) and threadedly connected to the mounting bolt (10); the fastening nut (11) is placed at the upper end of the wiring board (2).
3. A busbar expansion joint in a common box according to claim 2, characterized in that: A threaded sleeve (8) is provided on the inner side of the sleeve (3); the upper end of the threaded sleeve (8) is fixedly connected to the inner wall of the sleeve (3); the lower end of the threaded sleeve (8) is sleeved on the outer side of the mounting bolt (10); and the threaded sleeve (8) is threadedly connected to the mounting bolt (10).
4. A busbar expansion joint in a common box according to claim 3, characterized in that: The lower end surface of the sleeve (3) contacts the upper end surface of the fastening nut (11).
5. The busbar expansion joint in a common box according to claim 1, characterized in that: Two baffles (5) are provided at the upper end of the sheath (3), and the baffles (5) are fixedly connected to two sides of the sheath (3).
6. A busbar expansion joint in a common box according to claim 2, characterized in that: A first gasket (9) is provided between the first nut (7) and the terminal block (2), and the first gasket (9) is sleeved on the outside of the assembly bolt (4). A second gasket (15) is provided between the fastening nut (11) and the terminal block (2), and the second gasket (15) is sleeved on the outside of the installation bolt (10).