Transformer neutral point isolation switch

Abstract

The utility model discloses a transformer neutral point disconnecting switch, which comprises a first switch fitting, a second switch fitting is mounted at the end of the first switch fitting, an adjusting seat is welded and fixed at the bottom of the second switch fitting, two groups of adjusting holes are formed in the surface of the adjusting seat, and the adjusting seat is matched with the second switch fitting in size. An adjusting seat is inserted into the second switch fitting; insulating columns are fixedly installed on the surfaces of the first switch fitting and the second switch fitting. According to the transformer neutral point isolation switch, adjustment work is carried out by adjusting the depth of the adjusting seat inserted into the second switch fitting and the depth of the guide seat inserted into the guide groove, locking is carried out through the fixing stud and the nut after adjustment is completed, the distance between the two insulation columns in the isolation switch can be adjusted, and the isolation switch is convenient to use. Therefore, the isolation switch can flexibly adjust the spacing according to the condition of an actual installation site, and the problem of space mismatching in the installation process is avoided.

Description

Technical Field

[0001] The utility model relates to the field of circuit hardware, in particular to a transformer neutral point isolating switch. Background Art

[0002] The transformer neutral point disconnector is an electrical device installed at the neutral point of the transformer; its main functions include: changing the grounding mode of the system: during the operation of the power system, the neutral point disconnector can be operated to switch the system grounding mode, such as changing from direct grounding to ungrounded or grounding through arc suppression coils, to adapt to different operating conditions and improve the stability of the system; for example, in some cases, in order to limit the single-phase grounding fault current, the neutral point grounding mode will be switched from direct grounding to grounding through arc suppression coils; realizing the shutdown and maintenance of the transformer: when the transformer needs to be repaired or shut down, the neutral point disconnector can be disconnected to ensure the safety of the operator and the reliable isolation of the equipment;

[0003] The distance between the two rod-shaped insulating pillars in the disconnector cannot be adjusted, so that the disconnector cannot flexibly adjust the distance according to the conditions of the actual installation site, which may cause space mismatch problems during the installation process. Utility Model Content

[0004] The purpose of the utility model is to provide a transformer neutral point isolating switch to solve the defects mentioned in the above background technology.

[0005] To achieve the above-mentioned purpose, a transformer neutral point isolating switch is provided, comprising a first switch fitting, a second switch fitting is installed at the end of the first switch fitting, and an adjustment seat is welded and fixed at the bottom of the second switch fitting, and two groups of adjustment holes are provided on the surface of the adjustment seat, and the adjustment seat is adapted to the size of the second switch fitting, and the adjustment seat is plugged into the interior of the second switch fitting; insulating columns are fixedly installed on the surfaces of the first switch fitting and the second switch fitting, and a first top seat and a second top seat are respectively installed on the tops of the two groups of insulating columns, and a first extended connecting seat is arranged on the outer side of the first top seat, and a second extended connecting seat is arranged on the outer side of the second top seat, the first extended connecting seat comprises an inner insert fixedly installed at the bottom of the first top seat, and the outer side of the inner insert is sleeved with a mounting frame, and two groups of mounting bolts are welded and fixed on the right side surface of the bottom of the mounting frame; a guide seat is fixedly installed on the left side surface of the first top seat.

[0006] Preferably, the first extension connection seat and the second extension connection seat are symmetrical structures about the central axis of the guide seat, and a U-shaped hole is provided on the surface of the mounting frame on the first extension connection seat, and a fixing stud is inserted into the interior of the U-shaped hole.

[0007] Preferably, the bottom of the fixing stud is welded to the surface of the inner insert, and the outer side of the fixing stud on the surface of the inner insert is threadedly installed with a fixing nut. At the same time, the inner insert is inserted into the interior of the installation frame and adjusted and fixed through the U-shaped hole, the fixing stud and the fixing nut. The first extended connecting seat and the second extended connecting seat are connected to the external power facilities through two sets of mounting bolts on the outer side of the bottom.

[0008] Preferably, the guide seats are arranged in two groups in parallel, and guide grooves are provided on both side surfaces of the second top seat, and the sizes of the guide grooves and the guide seats are adapted to each other.

[0009] Preferably, the two groups of guide seats are respectively inserted into the guide grooves located on both sides of the second top seat, and the cross-sections of the guide grooves and the guide seats are both dovetail structures.

[0010] Preferably, the cross-sections of the first switch fitting and the second switch fitting are both "U"-shaped, and two sets of fixing studs are fixedly installed on the bottom of the second switch fitting. At the same time, the adjustment seat is inserted into the interior of the first switch fitting and adjusted and fixed through the fixing studs, adjustment holes and nuts.

[0011] Compared with the prior art, the beneficial effects of the utility model are: the adjustment work is performed by adjusting the depth of the adjustment seat inserted into the second switch hardware and the depth of the guide seat inserted into the guide groove. After the adjustment is completed, it can be locked by fixing the studs and nuts. The distance between the two insulating columns in the isolating switch can be adjusted, so that the isolating switch can flexibly adjust the distance according to the conditions of the actual installation site, avoiding the problem of space mismatch during the installation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the front view of the structure of the utility model;

[0013] Figure 2 for Figure 1 Bottom view of

[0014] Figure 3 for Figure 1 A top view of

[0015] Figure 4 for Figure 1 Rear view of.

[0016] Numbers in the figure: 1. first switch fitting; 2. second switch fitting; 21. insulating column; 22. adjustment seat; 3. adjustment hole; 4. first extension connection seat; 41. inner insert; 42. mounting frame; 43. U-shaped hole; 44. mounting bolt; 45. fixing stud; 5. second extension connection seat; 6. first top seat; 7. guide seat; 8. second top seat; 9. guide groove. DETAILED DESCRIPTION

[0017] See also Figure 1-4 The utility model provides a transformer neutral point isolating switch, comprising a first switch fitting 1, a second switch fitting 2 is installed at the end of the first switch fitting 1, and an adjustment seat 22 is welded and fixed at the bottom of the second switch fitting 2, and two groups of adjustment holes 3 are opened on the surface of the adjustment seat 22, and the adjustment seat 22 is adapted to the size of the second switch fitting 2, and the adjustment seat 22 is plugged into the inside of the second switch fitting 2; insulating columns 21 are fixedly installed on the surfaces of the first switch fitting 1 and the second switch fitting 2, and a first top seat 6 and a second top seat 8 are respectively installed on the tops of the two groups of insulating columns 21, and a first extended connection seat 4 is arranged on the outer side of the first top seat 6, and a second extended connection seat 5 is arranged on the outer side of the second top seat 8, the first extended connection seat 4 comprises an inner insert 41 fixedly installed at the bottom of the first top seat 6, and the outer side of the inner insert 41 is sleeved with a mounting frame 42, and two groups of mounting bolts 44 are welded and fixed on the right side surface of the bottom of the mounting frame 42; a guide seat 7 is fixedly installed on the left side surface of the first top seat 6.

[0018] Working away from: When in use, insulating columns 21 are installed on the first switch fitting 1 and the second switch fitting 2. The distance between the two groups of insulating columns 21 and the distance between the first switch fitting 1 and the second switch fitting 2 can be adapted and adjusted through the adjustment seat 22, the guide seat 7 and the guide groove 9. The specific method is: first, the adjustment seat 22 is inserted into the inside of the second switch fitting 2, and the guide seat 7 is inserted into the inside of the guide groove 9. The depth of the adjustment seat 22 inserted into the inside of the second switch fitting 2 and the depth of the guide seat 7 inserted into the inside of the guide groove 9 are adjusted. After the adjustment is completed, it can be locked by fixing the studs 45 and the nuts. The spacing between the two insulating columns 21 in the isolating switch can be adjusted, so that the isolating switch can flexibly adjust the spacing according to the conditions of the actual installation site to avoid space mismatch problems during installation.

[0019] As a preferred embodiment, the first extension connection seat 4 and the second extension connection seat 5 are symmetrical structures about the central axis of the guide seat 7, and a U-shaped hole 43 is opened on the surface of the installation frame 42 on the first extension connection seat 4, and a fixing stud 45 is inserted into the interior of the U-shaped hole 43.

[0020] The bottom of the fixing stud 45 is welded to the surface of the inner insert 41, and the outer side of the fixing stud 45 on the surface of the inner insert 41 is screwed and installed with a fixing nut. At the same time, the inner insert 41 is inserted into the interior of the installation frame 42 and adjusted and fixed through the U-shaped hole 43, the fixing stud 45 and the fixing nut. The first extension connecting seat 4 and the second extension connecting seat 5 are connected to external power facilities through two sets of mounting bolts 44 on the outer side of the bottom.

[0021] like Figure 1-4As shown: the installation frame 42 is connected to the external power facilities through two sets of installation bolts 44 on the outside of the bottom, and the distance between the installation frame 42 and the first top seat 6 can be adjusted through the U-shaped hole 43, the fixing studs 45 and the nuts, thereby improving the adaptability of the device during installation.

[0022] As a preferred embodiment, two groups of guide seats 7 are arranged in parallel, and guide grooves 9 are provided on both side surfaces of the second top seat 8 , and the guide grooves 9 are adapted to the size of the guide seats 7 .

[0023] As a preferred implementation, the two groups of guide seats 7 are respectively inserted into the guide grooves 9 located on both sides of the second top seat 8, and the cross-sections of the guide grooves 9 and the guide seats 7 are both dovetail structures.

[0024] The cross-sections of the first switch fitting 1 and the second switch fitting 2 are both "U"-shaped, and two sets of fixing studs 45 are fixedly installed at the bottom of the second switch fitting 2. At the same time, the adjustment seat 22 is inserted into the inside of the first switch fitting 1 and is adjusted and fixed through the fixing studs 45, the adjustment hole 3 and the nut.

Claims

1. A transformer neutral point disconnector, comprising a first switch fitting (1), characterized in that: The second switch fitting (2) is installed at the end of the first switch fitting (1), and an adjustment seat (22) is welded and fixed at the bottom of the second switch fitting (2), and two groups of adjustment holes (3) are provided on the surface of the adjustment seat (22), and the adjustment seat (22) is matched to the size of the second switch fitting (2), and the adjustment seat (22) is plugged into the inside of the second switch fitting (2); insulating columns (21) are fixedly installed on the surfaces of the first switch fitting (1) and the second switch fitting (2), and the tops of the two groups of insulating columns (21) are respectively installed A first top seat (6) and a second top seat (8), a first extension connection seat (4) is arranged on the outer side of the first top seat (6), and a second extension connection seat (5) is arranged on the outer side of the second top seat (8), the first extension connection seat (4) comprises an inner insert (41) fixedly mounted on the bottom of the first top seat (6), and the outer side of the inner insert (41) is sleeved with a mounting frame (42), and two groups of mounting bolts (44) are welded and fixed on the right side surface of the bottom of the mounting frame (42); a guide seat (7) is fixedly mounted on the left side surface of the first top seat (6).

2. A transformer neutral point isolating switch according to claim 1, characterized in that: The first extension connection seat (4) and the second extension connection seat (5) are symmetrical structures about the central axis of the guide seat (7), and a U-shaped hole (43) is provided on the surface of the mounting frame (42) on the first extension connection seat (4), and a fixing stud (45) is inserted into the interior of the U-shaped hole (43).

3. A transformer neutral point isolating switch according to claim 2, characterized in that: The bottom of the fixing stud (45) is welded to the surface of the inner insert (41), and the outer side of the fixing stud (45) on the surface of the inner insert (41) is screwed to the fixing nut, and the inner insert (41) is inserted into the interior of the installation frame (42) and adjusted and fixed through the U-shaped hole (43), the fixing stud (45) and the fixing nut, and the first extension connection seat (4) and the second extension connection seat (5) are connected to external power facilities through two groups of installation bolts (44) on the outer side of the bottom.

4. The transformer neutral point isolating switch according to claim 1, characterized in that: The guide seats (7) are arranged in two groups in parallel, and guide grooves (9) are provided on both side surfaces of the second top seat (8), and the sizes of the guide grooves (9) and the guide seats (7) are adapted to each other.

5. A transformer neutral point isolating switch according to claim 4, characterized in that: The two sets of guide seats (7) are respectively inserted into the guide grooves (9) located on both sides of the second top seat (8), and the cross-sections of the guide grooves (9) and the guide seats (7) are both dovetail structures.

6. The transformer neutral point isolating switch according to claim 1, characterized in that: The cross-sections of the first switch fitting (1) and the second switch fitting (2) are both "U"-shaped, and two sets of fixing studs (45) are fixedly mounted on the bottom of the second switch fitting (2), while the adjustment seat (22) is plugged into the interior of the first switch fitting (1) and is adjusted and fixed by means of the fixing studs (45), the adjustment holes (3) and the nuts.

Images