A pluggable quick-install high-voltage bushing

Abstract

The invention discloses a pluggable and quick-install high-voltage bushing, comprising a high-voltage bushing and a base glass fiber reinforced plastic cylinder, wherein the high-voltage bushing comprises an upper end cap, a hollow composite sleeve, a bushing flange and a capacitor core, wherein the upper end cap is arranged on the top of the capacitor core, the bushing flange is sleeved on the middle section of the core of the capacitor core, the hollow composite sleeve is sleeved on the outside of the capacitor core between the upper end cap and the bushing flange, the capacitor core located below the bushing flange is arranged inside the base glass fiber reinforced plastic cylinder, the top of the base glass fiber reinforced plastic cylinder is connected to the bottom of the bushing flange through a base flange plate, a base bearing member is arranged at the bottom of the base glass fiber reinforced plastic cylinder, and an oil compensator is also arranged on the middle flange body of the bushing flange; the oil compensator comprises a bushing and an oil level display meter arranged at the end of the bushing, and an oil pressure balancing assembly is also arranged inside the bushing. The invention has a stable structure, is convenient for installation and disassembly, and can buffer the oil level and oil pressure.

Description

Technical Field

[0001] The invention relates to a pluggable quick-installation high-voltage bushing, belonging to the field of high-voltage bushings. Background Art

[0002] With the development of society, electricity consumption has increased rapidly, and the load of each substation has become larger and larger. The stability of the transformer high-voltage bushing has become the key to the stable operation of the substation. However, in the actual application of the existing transformer high-voltage bushing, the current-carrying guide rod and the base connecting rod are often connected separately by bolts, and there are phenomena such as the bushing current-carrying guide rod and the base connecting rod are not concentric, the current-carrying guide rod is eccentric, the position is not correct, and it is easy to loosen; the base connecting rod and the base current-carrying disk are threadedly connected, the current-carrying reliability is low, and the connection stability is poor. In addition, the above two methods are not convenient for assembly and disassembly; in addition, the existing transformer high-voltage bushing cannot detect the oil level between the transformer bushing and the base, and when the weather changes and the oil pressure changes, it is impossible to buffer the oil pressure between the transformer bushing and the base. Summary of the invention

[0003] In order to solve the deficiencies of the prior art, the present invention provides a pluggable quick-install high-voltage bushing, which is convenient for installation and disassembly and can buffer the oil level and oil pressure.

[0004] The technical solution adopted by the present invention is:

[0005] A pluggable and quick-install high-voltage bushing comprises a high-voltage bushing and a base glass fiber reinforced plastic cylinder. The high-voltage bushing comprises an upper seal, a hollow composite sleeve, a bushing flange and a capacitor core. The upper seal is arranged on the top of the capacitor core, the bushing flange is sleeved on the middle section of the core of the capacitor core, the hollow composite sleeve is sleeved on the outside of the capacitor core between the upper seal and the bushing flange, the two ends of the hollow composite sleeve are respectively connected to the upper seal and the bushing flange, the capacitor core located below the bushing flange is arranged inside the base glass fiber reinforced plastic cylinder, and an accommodating space is formed between the capacitor core and the base glass fiber reinforced plastic cylinder, the top of the base glass fiber reinforced plastic cylinder is connected to the bottom of the bushing flange through a base flange, and a base bearing member is arranged at the bottom of the base glass fiber reinforced plastic cylinder;

[0006] An oil delivery channel connected to the accommodation space between the capacitor core and the base glass fiber reinforced plastic cylinder is provided on one side of the flange plate at the bottom of the casing flange, a communication channel connected to the accommodation space between the capacitor core and the base glass fiber reinforced plastic cylinder is provided on the other side of the middle flange body of the casing flange, and an oil compensator connected to the end of the communication channel is also provided on the middle flange body of the casing flange;

[0007] The oil compensator comprises a sleeve and an oil level display gauge arranged at the end of the sleeve, and an oil pressure balance component is also arranged in the sleeve.

[0008] Preferably, the oil pressure balancing assembly includes a guide sleeve connected to the middle flange body of the sleeve flange, a butterfly spring washer arranged in the guide sleeve, a connecting piece and a bellows, the connecting piece includes a connecting column of an I-shaped structure, a fixing rod is arranged at the small radius end of the connecting column, the fixing rod extends to the interior of the butterfly spring washer and is fixedly connected to the butterfly spring washer, the large radius end of the connecting column is fixedly connected to one end of the bellows, the other end of the bellows is fixedly connected to the oil level display gauge, and a gap is left between the large radius end of the connecting column and the bellows and the sleeve.

[0009] Further preferably, the upper head includes a casing general cap connected to the top flange of the hollow composite casing and an air end connecting plate arranged on the top of the casing general cap.

[0010] Further preferably, the base bearing member includes a base current-carrying plate connected to the bottom of the base fiberglass tube and an oil-insulated terminal block arranged at the bottom end of the base current-carrying plate, a current-carrying guide rod and a base connecting rod are arranged in the central hole of the capacitor core, the top end of the current-carrying guide rod is fixedly connected to the general cap of the sleeve, the bottom end of the current-carrying guide rod extends into the central hole of the capacitor core located in the sleeve flange and is connected to the top end of the base connecting rod, and the bottom end of the base connecting rod is connected to the base current-carrying plate.

[0011] Further preferably, the top end of the base connecting rod forms a small-diameter end extending to the bottom end of the current-carrying guide rod and is fixedly connected by bolts, a connecting pipe is sleeved at the connection between the current-carrying guide rod and the base connecting rod, and locking nuts are respectively provided on the current-carrying guide rod at both ends of the connecting pipe and the base connecting rod.

[0012] A further preference is that a sink groove is formed at one end where the current-carrying disk of the base is connected, a spring washer is arranged in the sink groove, the bottom end of the base connecting rod extends into the sink groove and abuts against the spring washer, a sink ring is formed on the rod body of the base connecting rod located in the sink groove, a watchband contact is sleeved in the sink ring, a nut is threadedly sleeved on the rod body of the base connecting rod located outside the sink groove, the nut abuts against the base current-carrying disk, and a plurality of locking bolts connected to the base current-carrying disk are arranged on the nut.

[0013] Further preferably, a plurality of polytetrafluoroethylene rings are sleeved on the rod bodies of the current-carrying guide rod and the base connecting rod, and the polytetrafluoroethylene rings abut against the central hole of the capacitor core.

[0014] Further preferably, sealing rings are provided at the connection between the top of the base glass fiber reinforced plastic cylinder and the base flange, the connection between the bottom of the sleeve flange and the base flange, and the connection between the bottom of the base glass fiber reinforced plastic cylinder and the base current-carrying plate.

[0015] Further preferably, the diameter of the base flange is larger than the diameter of the bottom end of the sleeve flange, and an exhaust hole is provided on the flange body on one side of the base flange.

[0016] Further preferably, an oil-pressure equalizing ball is arranged outside the current-carrying plate of the base and the oil-connecting plate.

[0017] The beneficial effects of the present invention are:

[0018] 1. The oil compensator can detect the oil level between the transformer bushing and the base fiberglass cylinder, improving operational reliability; the bellows guide device can realize the centering and movement of the bellows, solving the problem of the mobile bellows jamming and avoiding the roller friction problem of the rail-type bellows; the change of oil pressure causes the bellows to move, and the movement of the bellows activates the oil level indicator, which can realize real-time monitoring of the oil level and buffer the oil pressure;

[0019] 2. The current-carrying guide rod and the base connecting rod are fixed by a connecting pipe, which can ensure that the current-carrying guide rod and the base connecting rod are concentric, maintain the verticality of the current-carrying guide rod, improve the actual installation operability, and improve the installation efficiency; the locking nut can prevent the connection pipe from loosening, so that the current-carrying guide rod, the base connecting rod, and the connecting pipe are integrated, which significantly improves the connection reliability, and this structure is a detachable structure, which can easily realize the assembly and disassembly of the current-carrying guide rod and the base connecting rod;

[0020] 3. The threaded connection between the base connecting rod and the base current-carrying disk is replaced by a strap contact connection to improve the current-carrying reliability; the spring pad prevents the base connecting rod from loosening, improves the connection reliability, and this structure is a detachable structure, which can realize the rapid assembly and disassembly of the base connecting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure at the casing flange;

[0023] Figure 3 It is a structural schematic diagram of the base bearing member;

[0024] Figure 4 It is a schematic diagram of the structure of the connection between the current-carrying guide rod and the base connecting rod;

[0025] The main reference numerals in the figure have the following meanings:

[0026] 1. High-voltage bushing; 2. FRP cylinder of base; 3. Upper head; 4. Hollow composite bushing; 5. Bushing flange; 6. Capacitor core; 7. Base flange; 8. Oil delivery channel; 9. Connecting channel; 10. Oil compensator; 11. Bushing; 12. Oil level indicator; 13. Guide sleeve; 14. Butterfly spring washer; 15. Bellows; 16. Connecting column; 17. Fixing rod; 18. Bushing general cap; 19. Air end connecting plate; 20. Base current-carrying plate; 21. Current-carrying guide rod; 22. Base connecting rod; 23. Connecting pipe; 24. Locking nut; 25. Sink; 26. Spring washer; 27. Polytetrafluoroethylene ring; 28. Sealing ring; 29. ​​Exhaust hole; 30. Oil equalizing ball; 31. Nut; 32. Locking bolt; 33. Oil terminal block; 34. Strap contact. DETAILED DESCRIPTION

[0027] The present invention will be specifically described below in conjunction with the accompanying drawings and embodiments.

[0028] like Figure 1-4 As shown: This embodiment is a pluggable quick-installation high-voltage bushing, comprising a high-voltage bushing 1 and a base glass fiber reinforced plastic cylinder 2, the high-voltage bushing 1 comprising an upper head 3, a hollow composite sleeve 4, a bushing flange 5 and a capacitor core 6, the upper head 3 is arranged on the top of the capacitor core 6, the bushing flange 5 is sleeved on the middle section of the core of the capacitor core 6, the hollow composite sleeve 4 is sleeved on the outside of the capacitor core 6 located between the upper head 3 and the bushing flange 5, the two ends of the hollow composite sleeve 4 are respectively flange-connected with the upper head 3 and the bushing flange 5, the capacitor core 6 located below the bushing flange 5 is arranged inside the base glass fiber reinforced plastic cylinder 2, and an accommodating space is formed between the capacitor core 6 and the base glass fiber reinforced plastic cylinder 2, the top of the base glass fiber reinforced plastic cylinder 2 is connected to the bottom of the bushing flange 5 through a base flange 7, and a base bearing member is arranged at the bottom of the base glass fiber reinforced plastic cylinder 2;

[0029] An oil delivery channel 8 connected to the accommodation space between the capacitor core 6 and the base FRP cylinder 2 is provided on one side of the flange plate at the bottom of the casing flange 5, a connecting channel 9 connected to the accommodation space between the capacitor core 6 and the base FRP cylinder 2 is provided on the other side of the middle flange body of the casing flange 5, and an oil compensator 10 connected to the end of the connecting channel 9 is also provided on the middle flange body of the casing flange 5; the oil compensator 10 includes a casing 11 and an oil level indicator 12 provided at the end of the casing 11, and an oil pressure balancing component is also provided in the casing 11; in actual application, oil is input into the accommodation space through the oil delivery channel 8 until the oil level can be detected by the oil level indicator 12, and then the oil delivery channel 8 is sealed by a seal.

[0030] See also Figure 2As shown, the oil pressure balance assembly includes a guide sleeve 13 connected to the middle flange body of the sleeve flange 5, a butterfly spring washer 14 arranged in the guide sleeve 13, a connecting piece and a bellows 15, the connecting piece includes an I-shaped connecting column 16, a fixing rod 17 is arranged at the small radius end of the connecting column 16, the fixing rod 17 extends to the inside of the butterfly spring washer 14 and is fixedly connected to the butterfly spring washer 14, the large radius end of the connecting column 16 is fixedly connected to one end of the bellows 15, the other end of the bellows 15 is fixedly connected to the oil level display gauge 12, and a gap is left between the large radius end of the connecting column 16 and the bellows 15 and the sleeve 11.

[0031] See also Figure 1 As shown, the upper end cap 3 includes a casing general cap 18 connected to the top flange of the hollow composite casing 4 and an air end connecting plate 19 arranged on the top of the casing general cap 18 .

[0032] See also Figure 1 , Figure 3 As shown, the base bearing member includes a base current-carrying disk 20 connected to the bottom of the base glass fiber reinforced plastic cylinder 2 and an oil-in-oil terminal block 33 arranged at the bottom end of the base current-carrying disk 20, a current-carrying guide rod 21 and a base connecting rod 22 are arranged in the central hole of the capacitor core 6, the top end of the current-carrying guide rod 21 is fixedly connected to the bushing general cap 18, the bottom end of the current-carrying guide rod 21 extends to the central hole of the capacitor core 6 located in the bushing flange 5 and is connected to the top end of the base connecting rod 22, and the bottom end of the base connecting rod 22 is connected to the base current-carrying disk 20.

[0033] See also Figure 4 As shown, the top end of the base connecting rod 22 forms a small-diameter end extending to the bottom end of the current-carrying guide rod 21 and is fixedly connected by bolts, and a connecting pipe 23 is sleeved at the connection between the current-carrying guide rod 21 and the base connecting rod 22, and locking nuts 24 are respectively provided on the current-carrying guide rod 21 and the base connecting rod 22 at both ends of the connecting pipe 23.

[0034] See also Figure 3 As shown, a sink groove 25 is formed at one end connected to the base current-carrying disk 20, and a spring washer 26 is arranged in the sink groove 25. The bottom end of the base connecting rod 22 extends into the sink groove 25 and abuts against the spring washer 26. A sink ring is formed on the rod body of the base connecting rod 22 located in the sink groove 25, and a watchband contact 34 is sleeved in the sink ring. A nut 31 is threadedly sleeved on the rod body of the base connecting rod 22 located outside the sink groove 25, and the nut 31 abuts against the base current-carrying disk 20, and a plurality of locking bolts 32 connected to the base current-carrying disk 20 are arranged on the nut 31.

[0035] See also Figure 1 , Figure 2As shown, the rod bodies of the current-carrying guide rod 21 and the base connecting rod 22 are sleeved with a plurality of polytetrafluoroethylene rings 27 , and the polytetrafluoroethylene rings 27 abut against the central hole of the capacitor core 6 .

[0036] See also Figure 2 , Figure 3 As shown, sealing rings 28 are provided at the connection between the top of the base FRP cylinder 2 and the base flange 7, the connection between the bottom of the sleeve flange 5 and the base flange 7, and the connection between the bottom of the base FRP cylinder 2 and the base current-carrying plate 20.

[0037] See also Figure 2 As shown, the diameter of the base flange 7 is larger than the diameter of the bottom end of the bushing flange 5, and an exhaust hole 29 is opened on one side of the flange body of the base flange 7. The exhaust hole 29 facilitates the exhaust of the high-voltage bushing 1 after installation with the transformer through the base flange 7.

[0038] See also Figure 1 , Figure 2 , Figure 3 As shown, an oil-pressure equalizing ball 30 is arranged outside the base current-carrying plate 20 and the oil-connecting plate 33 .

[0039] In the present invention, the oil level display gauge 12 in the oil compensator 10 can detect the oil level between the high-voltage bushing 1 and the base fiberglass cylinder 2, thereby improving operational reliability; the guide sleeve 13 of the bellows 15 and the butterfly spring washer 14 can realize the centering and movement of the bellows 15, thereby solving the problem of the mobile bellows jamming and avoiding the roller friction problem of the guide rail bellows; the change in oil pressure causes the bellows 15 to move, and the movement of the bellows 15 causes the oil level display gauge 12 to operate, and the oil level display gauge 12 can realize real-time monitoring of the oil level and buffer the oil pressure.

[0040] The current-carrying guide rod 21 and the base connecting rod 22 in the present invention are fixed by the connecting pipe 23, which can ensure that the current-carrying guide rod 21 and the base connecting rod 22 are concentric, maintain the verticality of the current-carrying guide rod 21, improve the actual installation operability, and improve the installation efficiency; the locking nut 24 can prevent the connecting pipe 23 from being loosened, so that the current-carrying guide rod 21, the base connecting rod 22, and the connecting pipe 23 are integrated, which significantly improves the connection reliability, and this structure is a detachable structure, which can simply realize the assembly and disassembly of the current-carrying guide rod 21 and the base connecting rod 22; the threaded connection between the base connecting rod 22 and the base current-carrying disk 20 is replaced by a strap contact 34 to improve the current-carrying reliability; the spring pad 26 realizes the anti-loosening of the base connecting rod 22, improves the connection reliability, and this structure is a detachable structure, which can realize the rapid assembly and disassembly of the base connecting rod 22.

[0041] The above is only a preferred implementation of the patent of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the patent of the present invention. These improvements and modifications should also be regarded as the scope of protection of the patent of the present invention.

Claims

1. A pluggable quick-install high-voltage bushing, characterized in that: The invention comprises a high-voltage bushing (1) and a base glass fiber reinforced plastic cylinder (2), wherein the high-voltage bushing (1) comprises an upper end cap (3), a hollow composite sleeve (4), a bushing flange (5) and a capacitor core (6), wherein the upper end cap (3) is arranged on the top of the capacitor core (6), the bushing flange (5) is sleeved on the middle section of the core of the capacitor core (6), the hollow composite sleeve (4) is sleeved on the outside of the capacitor core (6) located between the upper end cap (3) and the bushing flange (5), the two ends of the hollow composite sleeve (4) are respectively flange-connected to the upper end cap (3) and the bushing flange (5), the capacitor core (6) located below the bushing flange (5) is arranged inside the base glass fiber reinforced plastic cylinder (2), and an accommodation space is formed between the capacitor core (6) and the base glass fiber reinforced plastic cylinder (2), the top of the base glass fiber reinforced plastic cylinder (2) and the bottom of the bushing flange (5) are connected via a base flange plate (7), and a base bearing member is arranged at the bottom of the base glass fiber reinforced plastic cylinder (2); An oil delivery channel (8) communicating with the accommodation space between the capacitor core (6) and the base glass fiber reinforced plastic cylinder (2) is provided on one side of the bottom flange of the casing flange (5); a communication channel (9) communicating with the accommodation space between the capacitor core (6) and the base glass fiber reinforced plastic cylinder (2) is provided on the other side of the middle flange body of the casing flange (5); and an oil compensator (10) communicating with the end of the communication channel (9) is also provided on the middle flange body of the casing flange (5); The oil compensator (10) comprises a sleeve (11) and an oil level indicator (12) arranged at the end of the sleeve (11), and an oil pressure balance component is also arranged in the sleeve (11); The oil pressure balance assembly comprises a guide sleeve (13) connected to the middle flange body of the sleeve flange (5), a butterfly spring washer (14) arranged in the guide sleeve (13), a connecting piece and a bellows (15), wherein the connecting piece comprises an I-shaped connecting column (16), a fixing rod (17) is arranged at the small radius end of the connecting column (16), the fixing rod (17) extends into the interior of the butterfly spring washer (14) and is fixedly connected to the butterfly spring washer (14), the large radius end of the connecting column (16) is fixedly connected to one end of the bellows (15), the other end of the bellows (15) is fixedly connected to the oil level display gauge (12), and a gap is left between the large radius end of the connecting column (16) and the bellows (15) and the sleeve (11).

2. The pluggable quick-install high-voltage bushing according to claim 1, characterized in that: The upper sealing head (3) comprises a sleeve general cap (18) connected to the top flange of the hollow composite sleeve (4) and an air end connecting plate (19) arranged on the top of the sleeve general cap (18).

3. The pluggable quick-install high-voltage bushing according to claim 2, characterized in that: The base bearing member comprises a base current-carrying plate (20) connected to the bottom of the base glass fiber reinforced plastic cylinder (2) and an oil-in-oil terminal block (33) arranged at the bottom end of the base current-carrying plate (20); a current-carrying guide rod (21) and a base connecting rod (22) are arranged in the central hole of the capacitor core (6); the top end of the current-carrying guide rod (21) is fixedly connected to the bushing cap (18); the bottom end of the current-carrying guide rod (21) extends into the central hole of the capacitor core (6) located in the bushing flange (5) and is connected to the top end of the base connecting rod (22); the bottom end of the base connecting rod (22) is connected to the base current-carrying plate (20).

4. The pluggable quick-install high-voltage bushing according to claim 3, characterized in that: The top end of the base connecting rod (22) forms a small-diameter end extending to the bottom end of the current-carrying guide rod (21) and is fixedly connected by bolts; a connecting pipe (23) is sleeved at the connection between the current-carrying guide rod (21) and the base connecting rod (22); and locking nuts (24) are respectively provided on the current-carrying guide rod (21) and the base connecting rod (22) at both ends of the connecting pipe (23).

5. The pluggable quick-install high-voltage bushing according to claim 3, characterized in that A sink groove (25) is formed at one end connected to the base current-carrying disk (20), a spring washer (26) is arranged in the sink groove (25), the bottom end of the base connecting rod (22) extends into the sink groove (25) and abuts against the spring washer (26), a sink ring is formed on the rod body of the base connecting rod (22) located in the sink groove (25), a watchband contact (34) is sleeved in the sink ring, a nut (31) is threadedly sleeved on the rod body of the base connecting rod (22) located outside the sink groove (25), the nut (31) abuts against the base current-carrying disk (20), and a plurality of locking bolts (32) connected to the base current-carrying disk (20) are arranged on the nut (31).

6. The pluggable quick-install high-voltage bushing according to claim 3, characterized in that: A plurality of polytetrafluoroethylene rings (27) are sleeved on the rod bodies of the current-carrying guide rod (21) and the base connecting rod (22), and the polytetrafluoroethylene rings (27) are in contact with the central hole of the capacitor core (6).

7. The pluggable quick-install high-voltage bushing according to claim 3, characterized in that: Sealing rings (28) are provided at the connection between the top of the base glass fiber reinforced plastic cylinder (2) and the base flange (7), the connection between the bottom of the sleeve flange (5) and the base flange (7), and the connection between the bottom of the base glass fiber reinforced plastic cylinder (2) and the base current-carrying plate (20).

8. The pluggable quick-install high-voltage bushing according to claim 3, characterized in that: The diameter of the base flange (7) is greater than the diameter of the bottom end of the sleeve flange (5), and an exhaust hole (29) is provided on one side of the flange body of the base flange (7).

9. The pluggable quick-install high-voltage bushing according to claim 3, characterized in that: An oil-pressure equalizing ball (30) is arranged outside the base current-carrying plate (20) and the oil-connecting terminal plate (33).

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