Suspension bus extension interface docking device

Abstract

The utility model relates to a suspension bus expansion interface butt joint device, comprising a connection conductor and contact assemblies for butt joint of a suspension bus and an early stage bus, the contact assemblies are plugged at two ends of the connection conductor, and a plurality of external bolts are arranged outside the contact assemblies. And the contact assemblies at the two ends of the connecting conductor are respectively connected and fixed with the bus interface of the suspension bus and the bus interface of the early-stage bus through external bolts. According to the utility model, the contact assembly is connected with the bus interface of the suspension bus and the bus interface of the early-stage bus by adopting the external bolt, when the two-stage bus is butted, the contact assembly can be inserted on the connecting conductor firstly, and the bolt is positioned outside the contact assembly, so that personnel can connect the bolt outside, the installation is convenient and rapid, and the installation efficiency is improved. Especially, when the connecting conductor needs to be disassembled, disassembly is more convenient by adopting an external bolt.

Description

Technical Field

[0001] The utility model relates to the technical field of busbar docking, in particular to a suspension busbar expansion interface docking device. Background Art

[0002] With the development of the power industry, the importance of power generation, transmission and transformation in the national economy has become particularly important. However, in the current construction process of each substation, due to a series of factors such as the early planning of the project, some busbars cannot be installed at one time during the construction of the project. Therefore, it is necessary to expand the early busbar through the second-phase expansion project. Usually, technicians will reserve a three-phase busbar interface on the early busbar for the connection of the second-phase project. The busbar to be expanded and connected in this expansion is a suspended structure busbar. To facilitate the connection of the two-phase busbars, the three-phase busbar interface of the suspension busbar and the three-phase busbar interface of the early busbar need to be installed with an expansion interface assembly. The expansion interface assemblies of the two-phase busbars are connected one by one through connecting conductors to achieve the connection between the suspension busbar and the early busbar.

[0003] The contacts of the existing expansion docking device are built-in structures, that is, the contacts are connected to the busbar interface through internal bolts located inside the contacts. Since the bolts are located inside the contacts, when docking, the contacts and the busbar interface can only be screwed together first, and then the connecting conductor and the contact are connected, which makes it very inconvenient to disassemble and assemble the connecting conductor, and the workload of on-site docking installation is large, and the installation efficiency is low. In addition, after the new equipment is installed and before the two-phase equipment is docked, the suspension busbar needs to be subjected to a pressure test. The suspension busbar needs to use a separate pressure-resistant tooling to achieve the purpose of separate pressure resistance, which is very inconvenient to use. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides an expansion interface docking device which not only meets the independent pressure-resistant conditions of the current suspended busbar but is also convenient for disassembly, making the independent pressure-resistant use of the current suspended busbar and the docking of two-phase busbars more convenient and improving installation efficiency.

[0005] The utility model is realized through the following technical scheme: a suspension bus expansion interface docking device, including a connecting conductor and a contact assembly for docking the suspension bus and the previous bus, the contact assemblies are plugged into the two ends of the connecting conductor, a plurality of external bolts are arranged on the outside of the contact assembly, and the contact assemblies at the two ends of the connecting conductor are respectively connected and fixed to the busbar interface of the suspension bus and the busbar interface of the previous bus through the external bolts.

[0006] The contact assembly of this solution uses external bolts to connect the busbar interface of the suspension busbar and the busbar interface of the early busbar. When the two phases of busbars are connected, the contact assembly can be plugged into the connecting conductor first. Since the bolts are located outside the contact assembly, personnel can connect the bolts externally, which is convenient and fast to install and improves the installation efficiency. Especially when the connecting conductor needs to be disassembled, it is more convenient to disassemble with external bolts.

[0007] As an optimization, the contact assembly includes a contact body. An insertion slot is formed inwardly at the front end of the contact body. A guiding ring and a conductive spring are embedded in the insertion slot. The end of the connecting conductor is inserted into the insertion slot. The plurality of external bolts are circumferentially distributed along the outer wall of the contact body and penetrate through the contact body. In this optimized solution, the connecting conductor is inserted into the insertion slot, which facilitates the connection between the contact assembly and the connecting conductor. The guiding ring guides the insertion of the connecting conductor, and the conductive spring elastically clamps the connecting conductor to improve the conductive effect.

[0008] As an optimization, a counterbore for accommodating the external bolt is formed on the outer wall of the contact body, and a first screw hole for the external bolt to pass through is formed on the rear end face of the counterbore.

[0009] As an optimization, the front end face of the counterbore is a transition inclined surface. This optimized solution facilitates the placement of the external bolt into the counterbore.

[0010] As an optimization, a first contact seat is screwed and fixed on the bus interface of the suspension bus. A second screw hole for connecting the external bolt is formed on the first contact seat. The contact assembly is screwed and fixed to the first contact seat through the external bolt. This optimized solution makes the connection between the contact assembly and the suspension bus more stable and facilitates the connection and installation of the contact assembly and the suspension bus.

[0011] As an optimization, a second contact seat is screwed and fixed on the bus interface of the pre-stage bus. A third screw hole for connecting the external bolt is formed on the second contact seat. The contact assembly is screwed and fixed to the second contact seat through the external bolt. This optimized solution makes the connection between the contact assembly and the pre-stage bus more stable and facilitates the connection and installation of the contact assembly and the pre-stage bus.

[0012] As an optimization, the three-phase bus interfaces of the suspension bus are, from front to back, the incoming side-phase bus interface, the middle-phase bus interface, and the far side-phase bus interface. A shielding cover is screwed on the first contact seat of the incoming side-phase bus interface, and shielding plugs are inserted into the contact assemblies of the middle-phase bus interface and the far side-phase bus interface. In this optimized solution, when a withstand voltage test needs to be performed on the suspension bus, a shielding cover is installed on the first contact seat of the incoming side-phase bus conductor, and shielding plugs are inserted into the contact assemblies of the middle-phase bus interface and the far side-phase bus interface to shield and seal the three-phase bus interfaces, that is, the condition for a separate withstand voltage test is met, and no external withstand voltage tooling is required, which is convenient for installation. After the test is completed, the shielding plugs and the shielding cover are removed, and the expansion docking operation can continue, greatly reducing the operation procedures and being convenient and flexible to use. And when withstanding voltage, a cover plate needs to be encapsulated on the side of the suspension bus close to the incoming side-phase bus interface. Therefore, no contact assembly is installed at the incoming side-phase bus interface and a shorter shielding cover is used, so as to increase the insulation distance from the cover plate and avoid discharge at the incoming side-phase bus interface end during the withstand voltage test, ensuring the safety of the test.

[0013] The beneficial effects of the utility model are as follows: When the two-phase busbars are butt-jointed, the contact assembly can be first inserted and connected to the connecting conductor. Since the external bolts are located outside the contact assembly, personnel can connect the bolts externally, which is convenient and fast for installation and improves the installation efficiency. Especially when it is necessary to disassemble the connecting conductor, it is more convenient to use external bolts for disassembly.

[0014] When a withstand voltage test needs to be performed on the hanging busbar, a shielding cover is installed on the first contact seat of the incoming side-phase busbar conductor, and a shielding plug is inserted into the contact assembly of the middle-phase busbar interface and the far side-phase busbar interface to shield and seal the three-phase busbar interfaces, that is, the conditions for a separate withstand voltage test are met, and there is no need to externally connect a withstand voltage tooling, which is convenient for installation. After the test is completed, the shielding head and the shielding cover are removed, and the expansion butt-joint operation can be continued, greatly reducing the operation procedures and being convenient and flexible to use.

[0015] The expansion butt-joint device of the utility model has a simple, practical, reliable and convenient structure, realizing the rapid expansion butt-joint of the two-phase busbars and the separate withstand voltage of the new busbar. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the butt-joint state of the hanging busbar and the previous-phase busbar;

[0017] Figure 2 It is a schematic diagram of the separate withstand voltage state of the hanging busbar;

[0018] Figure 3 It is a cross-sectional view of the contact assembly;

[0019] Figure 4 It is the front view, side cross-sectional view and rear view of the first contact seat;

[0020] Figure 5 It is the front view and side cross-sectional view of the second contact seat;

[0021] Figure 6 It is a cross-sectional view of the shielding cover;

[0022] Figure 7 It is a cross-sectional view of the shielding plug;

[0023] As shown in the figure:

[0024] 1. Connecting conductor; 2. Contact assembly; 21. Contact body; 22. Guide ring; 23. Conductive spring; 24. Sunk groove; 25. First screw hole; 26. Slot; 3. First contact seat; 31. Second screw hole; 32. Fourth screw hole; 33. Sixth screw hole; 4. Second contact seat; 41. Third screw hole; 42. Fifth screw hole; 5. Previous-phase busbar; 6. Hanging busbar; 61. Near side-phase busbar interface; 62. Middle-phase busbar interface; 63. Far side-phase busbar interface; 7. Shielding cover; 71. Seventh screw hole; 8. Shielding plug; 9. External bolt. Detailed Implementation Manner

[0025] To clearly illustrate the technical features of this solution, the following will elaborate on this solution through specific implementation manners.

[0026] As Figures 1 to 7 shown, a docking device for the expansion interface of a suspended busbar includes a connecting conductor 1 and a contact assembly 2 for connecting the suspended busbar 6 and the previous busbar 5. Both ends of the connecting conductor 1 are inserted with the contact assembly 2. Several external bolts 9 are arranged outside the contact assembly 2. The contact assemblies 2 at both ends of the connecting conductor 1 are respectively connected and fixed to the busbar interface of the suspended busbar 6 and the busbar interface of the previous busbar 5 through the external bolts 9. The number of the connecting conductors 1 is three, and both ends of the three connecting conductors 1 are inserted with the contact assembly 2. Through the cooperation of the three connecting conductors 1 and the contact assemblies 2 at both ends, the three-phase busbar interfaces of the suspended busbar 6 and the three-phase busbar interfaces of the previous busbar 5 are docked one by one.

[0027] The contact assembly 2 includes a contact body 21. A slot 26 is opened inward at the front end of the contact body 21. A guiding ring 22 and a conductive spring 23 are embedded in the slot 26. The end of the connecting conductor 1 is inserted into the slot 26. The several external bolts 9 are circumferentially arranged evenly on the outer wall of the contact body 21 and penetrate through the contact body. In this embodiment, one guiding ring 22 and two annular conductive springs 23 are arranged side by side in the slot 26. The inner diameters of the guiding ring 22 and the conductive spring 23 are adapted to the outer diameter of the connecting conductor 1. When the connecting conductor 1 is inserted into the slot, the inner walls of the guiding ring and the conductive spring are in contact with the outer wall of the connecting conductor.

[0028] A counterbore 24 for accommodating the external bolt 9 is opened on the outer wall of the contact body 21. A first screw hole 25 for the external bolt 9 to pass through is opened on the rear end face of the counterbore 24. The first screw hole 25 is a through hole, and the front end face of the counterbore 24 is a transition inclined surface. In this embodiment, four external bolts 9 are circumferentially arranged evenly on the outer wall of the contact body 21. The external bolts 9 are countersunk head bolts. Four counterbores 24 are circumferentially arranged evenly on the outer wall of the contact body 21. The four countersunk head bolts 9 respectively penetrate through the first screw holes 25 of the four counterbores.

[0029] To facilitate the screwing connection between the contact assembly 2 and the suspended busbar 6, a first contact seat 3 is screwed and fixed on the busbar interface of the suspended busbar. The contact assembly 2 is screwed and fixed to the first contact seat 3 through the external bolt 9. A second screw hole 31 for connecting the external bolt 9 is opened on the first contact seat 3.

[0030] On one side of the first contact base 3 of this embodiment, four of the second screw holes 31 are evenly distributed circumferentially. The four second screw holes 31 correspond one-to-one with the four first screw holes 25 of the contact body 21, and the second screw holes 31 and the first screw holes 25 are connected by an external bolt 9. On the other side of the first contact base 3, four of the fourth screw holes 32 are evenly distributed circumferentially. The four fourth screw holes 32 correspond one-to-one with the four screw holes of the bus interface of the hanging bus 6, and the fourth screw holes and the screw holes of the bus interface of the hanging bus are connected by fastening bolts. The second screw holes 31 and the fourth screw holes 32 on both sides of the first contact base of this embodiment do not penetrate the first contact base 3.

[0031] To facilitate the assembly of the contact 2 and the screwing of the bus 5 in the early stage, a second contact base 4 is screwed and fixed on the bus interface of the pre-stage bus 5. The contact assembly 2 is screwed and fixed to the second contact base 4 by an external bolt 9, and the second contact base 4 is provided with third screw holes 41 for connecting the external bolt 9.

[0032] In this embodiment, the second contact base 4 is evenly provided with four of the third screw holes 41 and four of the fifth screw holes 42. The four third screw holes 41 correspond one-to-one with the four first screw holes 25 of the contact body 21, and the third screw holes 41 and the first screw holes 25 are connected by an external bolt 9. The four fifth screw holes 42 correspond one-to-one with the four screw holes of the bus interface of the pre-stage bus 5, and the fifth screw holes 42 and the screw holes of the bus interface of the pre-stage bus are connected by fastening bolts. In this embodiment, the third screw holes 41 do not penetrate the second contact base 4, the fifth screw holes 42 are arranged to penetrate the second contact base 4, and the circumferential diameter of the third screw holes 41 is larger than the circumferential diameter of the fifth screw holes 42.

[0033] The three-phase bus interfaces of the hanging bus 6 are arranged from front to back. The three-phase bus interfaces of the hanging bus 6 successively include an inboard-phase bus interface 61, a middle-phase bus interface 62, and an outboard-phase bus interface 63 from front to back. When a separate withstand voltage test needs to be performed on the hanging bus 6, a shielding cover 7 is screwed and fixed on the first contact base 3 of the inboard-phase bus interface 61, and shielding plugs 8 are inserted into the contact assemblies 2 of the middle-phase bus interface 62 and the outboard-phase bus interface 63.

[0034] The shielding cover 7 of this embodiment is a fully enclosed shielding cover. A seventh screw hole 71 penetrating the shielding cover is provided at the center of the shielding cover 7. A sixth screw hole 33 corresponding to the seventh screw hole 71 is provided at the center of the first contact base 3, and the sixth screw hole 33 and the seventh screw hole 71 are connected by a fastening bolt. The shielding plug 8 is inserted into the slot 26 of the contact body 21, which is convenient for disassembly and assembly.

[0035] Working principle: First, conduct a separate withstand voltage test on the hanging busbar 6. Fix the first contact seat 3 on the three-phase busbar interfaces of the hanging busbar 6 by screwing. Among them, fix the shielding cover 7 on the first contact seat 3 of the in-phase busbar interface 61 by screwing. Fix the contact assemblies 2 on the first contact seats 3 of the middle-phase busbar interface 62 and the far-phase busbar interface 63 by screwing. Plug and fix the shielding plugs 8 on the contact assemblies 2 of the middle-phase busbar interface 62 and the far-phase busbar interface 63. Thus, the hanging busbar 6 of this period meets the condition for separate withstand voltage. After the withstand voltage is qualified, the connecting conductors of the two-phase busbars can be connected;

[0036] When connecting the two-phase busbars, remove the shielding cover 7 and the two shielding plugs 8 on the hanging busbar 6, and fix the contact assembly 2 on the first contact seat 3 of the in-phase busbar interface 61 by screwing. At the same time, fix the second contact seats 4 on the three-phase busbar interfaces of the previous busbar 5 by screwing. Finally, insert one end of the three connecting conductors 1 into the three contact assemblies 2 of the hanging busbar 6, and also insert the contact assemblies 2 at the other ends of the three connecting conductors 1. Screw and fix the contact assemblies 2 at the other ends of the three connecting conductors 1 to the three second contact seats 4 at the previous busbar end 5. Since the contact assembly 2 and the second contact seat 4 are connected by an external bolt 9, it is convenient for personnel to install and more convenient to use.

[0037] Of course, the above description is not limited to the above examples. The technical features not described in this utility model can be realized by or adopt the prior art, and will not be elaborated here; the above embodiments and drawings are only used to illustrate the technical solutions of this utility model and are not a limitation to this utility model. The preferred embodiments are described in detail with reference to this utility model. Those of ordinary skill in the art should understand that any changes, modifications, additions or substitutions made by those of ordinary skill in the art within the scope of the essence of this utility model do not depart from the purpose of this utility model and should also fall within the scope of the claims of this utility model.

Claims

1. A docking device for the expansion interface of a hanging busbar, comprising a connecting conductor (1) and a contact assembly (2) for docking a hanging busbar (6) and a previous busbar (5), characterized in that: Both ends of the connecting conductor (1) are plugged with the contact assembly (2). A number of external bolts (9) are provided outside the contact assembly (2). The contact assemblies (2) at both ends of the connecting conductor (1) are respectively connected and fixed to the bus interface of the suspension bus (6) and the bus interface of the previous bus (5) through the external bolts (9).

2. The butt joint device for the suspension busbar expansion interface according to claim 1, characterized in that: The contact assembly (2) includes a contact body (21). A slot (26) is formed in the front end of the contact body inward. A guide ring (22) and a conductive spring (23) are embedded in the slot. The end of the connecting conductor (1) is inserted into the slot (26). The several external bolts (9) are circumferentially distributed along the outer wall of the contact body (21) and penetrate through the contact body.

3. The docking device for the suspension busbar expansion interface according to claim 2, wherein: A counterbore (24) for accommodating the external bolt (9) is formed on the outer wall of the contact body (21). A first screw hole (25) for the external bolt to pass through is formed on the rear end face of the counterbore (24).

4. A hanging busbar expansion interface docking device according to claim 3, characterized in that: The front end face of the counterbore (24) is a transition inclined plane.

5. The butt joint device for the suspension busbar extension interface according to claim 1, wherein: A first contact seat (3) is screwed and fixed on the bus interface of the suspension bus (6). A second screw hole (31) for connecting the external bolt (9) is formed on the first contact seat. The contact assembly (2) is screwed and fixed to the first contact seat (3) through the external bolt.

6. The docking device for the expansion interface of the hanging busbar according to claim 1, wherein: A second contact seat (4) is screwed and fixed on the bus interface of the previous bus (5). A third screw hole (41) for connecting the external bolt (9) is formed on the second contact seat (4). The contact assembly (2) is screwed and fixed to the second contact seat (4) through the external bolt.

7. A hanging busbar expansion interface docking device according to claim 5, characterized in that: The three-phase bus interfaces of the suspension bus (6) successively include an inboard phase bus interface (61), a middle phase bus interface (62), and an outboard phase bus interface (63) from front to back. A shielding cover (7) is screwed on the first contact seat (3) of the inboard phase bus interface (61). Shielding plugs (8) are plugged on the contact assemblies (2) of the middle phase bus interface (62) and the outboard phase bus interface (63).

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