Primary and secondary fusion outdoor pole-mounted circuit breaker

Abstract

The utility model discloses a primary and secondary fusion outdoor pole-mounted circuit breaker, which belongs to the technical field of circuit breakers, and comprises a mounting rack, an operating mechanism mounted at the top of the mounting rack, a plurality of vacuum circuit breakers mounted at the top of the operating mechanism, and the operating mechanism used for driving the vacuum circuit breakers to open and close. A plurality of insulators I and insulators II are fixedly mounted at the top of the mounting frame, a group of knife switch assemblies are arranged at the tops of the insulators II, closing assemblies are arranged at the tops of the insulators I, and fixed knife switches and movable knife switches are mounted on brake bars in the knife switch assemblies; a plurality of telescopic springs are installed between the fixed disconnecting link and the movable disconnecting link to push the movable disconnecting link outwards, so that the movable disconnecting link can be tightly attached to an abutting plate on a brake base during closing, electric arcs caused by poor contact due to structure looseness after long-time use are prevented, and the use safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, and more specifically to a primary-secondary fusion outdoor pole-mounted circuit breaker. Background Art

[0002] The primary and secondary integrated circuit breaker is a kind of power equipment that deeply integrates the primary circuit (main circuit) and the secondary circuit (control circuit). The primary circuit refers to the circuit composed of electrical equipment that directly participates in the manufacture, transmission, conversion and use of electric energy, while the secondary circuit is the circuit composed of equipment that protects, measures, controls and meters the primary circuit equipment. It can realize the local line selection, section positioning and isolation of single-phase grounding faults through short-circuit / grounding fault detection technology, no-voltage tripping, fault path adaptive delay power-on closing and other control logic.

[0003] Chinese patent authorization announcement number: CN217280569U provides a stable primary and secondary fusion column mounted circuit breaker. This solution facilitates the clamping and fixing of the second frame and the third frame through the setting and use of the installation mechanism, thereby realizing the convenient installation of the primary and secondary fusion column mounted circuit breaker body and facilitating the subsequent disassembly, thereby facilitating the maintenance and replacement of the primary and secondary fusion column mounted circuit breaker body through the setting and use of the buffer mechanism.

[0004] Primary and secondary fusion circuit breakers usually need to be installed with an isolating switch for secondary power outage. Since the isolating switch can only be opened after the vacuum circuit breaker is powered off, as a redundant safety device, the above scheme and the currently existing isolating switches are directly installed in an exposed manner. However, after long-term use, a gap is likely to appear between the isolating switch and the gate seat, resulting in poor contact or arcing.

[0005] Therefore, in order to solve the above problems, a primary and secondary fusion outdoor pole-mounted circuit breaker is proposed. Utility Model Content

[0006] 1. Technical issues to be solved

[0007] The utility model provides a primary-secondary fused outdoor pole-mounted circuit breaker, which can improve the problem existing in the related technology: after long-term use, a gap is easily formed between the isolating knife switch and the gate seat, thereby causing poor contact or generating an arc.

[0008] 2. Technical solution

[0009] To solve the above problems, the utility model adopts the following technical solutions.

[0010] An embodiment of the present application provides a primary-secondary fusion outdoor pole-mounted circuit breaker, comprising a mounting frame, an operating mechanism mounted on the top of the mounting frame, a plurality of vacuum circuit breakers mounted on the top of the operating mechanism, the operating mechanism being used to drive the vacuum circuit breakers to open and close, a plurality of insulators one and two being fixedly mounted on the top of the mounting frame, a group of knife assemblies being arranged on the top of the plurality of insulators two, a closing assembly being arranged on the top of the plurality of insulators one, the knife assemblies comprising fixed knife gates and movable knife gates, a plurality of telescopic springs being fixedly mounted between the fixed knife gates and the movable knife gates, the closing assembly comprising two abutment plates, the movable knife gate being moved outward by the action of the telescopic springs to abut against the abutment plates.

[0011] The above technical solutions in the embodiments of the present application have at least the following technical effects:

[0012] (1) A fixed knife gate and a movable knife gate are installed on the gate rod in the knife gate assembly. A plurality of telescopic springs are installed between the fixed knife gate and the movable knife gate to push the movable knife gate outward so that it can be close to the abutment plate on the gate seat when the switch is closed, thereby preventing poor contact and arcing caused by loose structure after long-term use, thereby improving safety in use.

[0013] (2) The two abutment plates installed on the gate seat can be driven by a bidirectional threaded rod to adjust the distance between the two abutment plates so that they can be adjusted to match the gate knife assemblies according to the spacing between the two gate knife assemblies, thereby further improving the connection stability when closing the gate.

[0014] In some embodiments, a power terminal 2 is fixedly installed on the top of the insulator 1, a power terminal 1 is fixedly installed on the top of the insulator 2, an insulating sleeve is connected to the top of the vacuum circuit breaker through a copper busbar, and the power terminal 1 is connected to the vacuum circuit breaker through the copper busbar, and two fixing frames are fixedly installed on the top of the mounting frame, and a driving assembly is installed between the two fixing frames.

[0015] In some embodiments, the driving assembly includes a driving rod, which is rotatably mounted between the two fixed frames, a pull rod is fixedly mounted on one end of the driving rod, a plurality of driving blocks are fixedly mounted on the outer end of the driving rod, and an insulating connecting rod is rotatably connected to the outer end of the driving block.

[0016] In some embodiments, the knife switch assembly includes a gate rod, which is fixedly connected to the fixed knife switch, and one end of the gate rod away from the fixed knife switch is rotatably connected to an outer end of the power connection end, and the outer end of the gate rod is rotatably connected to the outer end of the insulating connecting rod.

[0017] In some embodiments, a slider is fixedly mounted on the bottom end of the movable knife gate, a sliding groove matching the slider is provided on the outer end of the gate rod, and the movable knife gate is slidably connected to the outer end of the gate rod through the slider.

[0018] In some embodiments, the closing assembly also includes a gate seat, which is fixedly connected to the second power connection terminal, a bidirectional threaded rod is installed on the inner side of the gate seat, threaded holes are provided at the outer ends of the two abutment plates, and the abutment plates are threadedly connected to the bidirectional threaded rods through the threaded holes, a movable block is fixedly connected to the bottom end of the abutment plate, and two movable grooves are provided at the bottom end of the gate seat, and the movable block is slidably connected to the movable grooves.

[0019] In some embodiments, the outer ends of the two abutment plates are fixedly connected to support plates, the support plates abut against the fixed knife gate, the outer ends of the gate seats are fixedly connected to vertical rods, and the top ends of the vertical rods are fixedly connected to guide plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a partial enlarged structural schematic diagram of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the knife switch assembly of the utility model;

[0023] Figure 4 It is a schematic diagram of the structure of the closing component of the utility model.

[0024] Description of the numbers in the figure:

[0025] 1. Mounting frame;

[0026] 2. Operating mechanism;

[0027] 3. Vacuum circuit breaker;

[0028] 4. Insulating sleeve;

[0029] 5. Pull rod;

[0030] 6. driving assembly; 61. driving rod; 62. driving block; 63. insulating connecting rod;

[0031] 7. Fixed frame;

[0032] 8. Connect to power terminal 1;

[0033] 9. Connect to the second power terminal;

[0034] 10. Knife switch assembly; 101. Gate rod; 102. Fixed knife switch; 103. Movable knife switch; 104. Telescopic spring; 105. Sliding block;

[0035] 11. Closing assembly; 111. Gate seat; 112. Bidirectional threaded rod; 113. Abutment plate; 114. Support plate; 115. Threaded hole; 116. Movable block; 117. Movable groove; 118. Vertical rod; 119. Guide plate;

[0036] 12. Insulator 1;

[0037] 13. Insulator 2. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0039] See also Figure 1-Figure 4 A primary-secondary fusion outdoor pole-mounted circuit breaker comprises a mounting frame 1, an operating mechanism 2 is mounted on the top of the mounting frame 1, a plurality of vacuum circuit breakers 3 are mounted on the top of the operating mechanism 2, the operating mechanism 2 is used to drive the vacuum circuit breakers 3 to open and close, a plurality of insulators 12 and 13 are fixedly mounted on the top of the mounting frame 1, a group of knife assemblies 10 are arranged on the top of the plurality of insulators 13, a closing assembly 11 is arranged on the top of the plurality of insulators 12, the knife assembly 10 comprises a fixed knife 102 and a movable knife 103, a plurality of telescopic springs 104 are fixedly mounted between the fixed knife 102 and the movable knife 103, the closing assembly 11 comprises two abutment plates 113, the movable knife 103 is moved outward by the force of the telescopic spring 104 and abuts against the abutment plate 113.

[0040] A power terminal 2 9 is fixedly installed on the top of insulator 12, a power terminal 1 8 is fixedly installed on the top of insulator 2 13, an insulating sleeve 4 is connected to the top of the vacuum circuit breaker 3 through a copper busbar, and the power terminal 1 8 is connected to the vacuum circuit breaker 3 through a copper busbar. Two fixing frames 7 are fixedly installed on the top of the mounting frame 1, and a driving assembly 6 is installed between the two fixing frames 7.

[0041] The device in this scheme is mainly used in high-voltage power grids. An operating mechanism 2 is installed on the top of the mounting frame 1, and multiple vacuum circuit breakers 3 are installed on the top of the operating mechanism 2. The operating mechanism 2 mainly includes spring operating mechanisms, voltage sensors, current sensors, zero-sequence voltage sensors and other sensor devices. The spring operating mechanism realizes the opening and closing operations of the vacuum circuit breaker 3 by storing and releasing spring energy, and the voltage sensor, current sensor, zero-sequence voltage sensor and other sensors are used to realize integrated intelligent circuit breakers for protection and control in power systems. They integrate primary and secondary equipment, provide protection, control, monitoring and communication functions, and are widely used in power systems. They have the advantages of high reliability, space saving, simplified maintenance and enhanced intelligence.

[0042] The interior of the vacuum circuit breaker 3 is mainly composed of a static contact and a moving contact. Through the internal vacuum environment, rapid arc extinguishing is achieved when the static and moving contacts are in contact or separated. The static contact in the vacuum circuit breaker 3 is located at the top and is connected to the insulating sleeve 4 through a copper busbar. The insulating sleeve 4 is mainly used to isolate the copper busbar from the external environment when passing through a wall or a box to prevent leakage. The insulating sleeve 4 can be connected to an external high-voltage circuit.

[0043] A plurality of insulators 2 13 and insulators 1 12 are fixed on the top of the mounting frame 1, wherein the insulator 2 13 is provided with a power terminal 1 8, which is connected to the moving contact on the vacuum circuit breaker 3 through a copper bar, thereby realizing the connection of the circuit, and the insulator 1 12 is provided with a power terminal 2 9, which is connected to the external high-voltage line through a copper bar or a cable, and the power terminal 2 9 is provided with a closing assembly 11, and the power terminal 1 8 is provided with a knife assembly 10, and a fixed knife switch 102 and a movable knife switch 103 are installed on a gate rod 101 in the knife switch assembly 10, and the fixed knife switch 1 A plurality of telescopic springs 104 are installed between 02 and the movable knife switch 103 to push the movable knife switch 103 outward so that it can be close to the abutment plate 113 on the gate seat 111 when closing the switch, to prevent poor contact due to loose structure after long-term use. When the entire circuit is energized, an arc will be generated if there is a gap caused by looseness. The two abutment plates 113 installed on the gate seat 111 can be driven by a bidirectional threaded rod 112 to adjust the distance between the two abutment plates 113 so that it can be adjusted according to the spacing between the two knife switch assemblies 10, thereby further improving the connection stability when closing the switch.

[0044] A driving assembly 6 is installed on the mounting frame 1 to drive the knife assembly 10. When the vacuum circuit breaker 3 disconnects the circuit, although the entire circuit is in a disconnected state, a safety redundant structure needs to be designed. At this time, the driving assembly 6 drives the knife assembly 10 to disconnect the closing assembly 11, so that a secondary power outage can be formed, making it safer for the staff during maintenance operations. It is worth mentioning that the knife assembly 10 and the closing assembly 11 must be disconnected before they can be opened, so as to prevent the knife assembly 10 from generating an arc when opening.

[0045] See also Figure 1 and Figure 2 The driving assembly 6 includes a driving rod 61, which is rotatably mounted between two fixing frames 7. A pull rod 5 is fixedly mounted on one end of the driving rod 61, and a plurality of driving blocks 62 are fixedly mounted on the outer end of the driving rod 61. The outer end of the driving block 62 is rotatably connected to an insulating connecting rod 63.

[0046] The driving assembly 6 in this scheme is mainly composed of a driving rod 61, multiple driving blocks 62 and multiple insulating connecting rods 63. Two fixing frames 7 are fixed on the mounting frame 1. The mounting frame 1 passes through the two fixing frames 7 and is rotatably mounted between the two fixing frames 7. A pull rod 5 is fixed on one end of the driving rod 61. The driving rod 61 can be driven to rotate by rotating the pull rod 5. Multiple driving blocks 62 are fixed on the driving rod 61, and one end of the insulating connecting rod 63 is rotatably connected to the driving block 62, and the other end is rotatably connected to the gate rod 101. The insulating connecting rod 63 is insulated to prevent electricity on the knife switch assembly 10 from being transmitted to the pull rod 5. When the staff rotates the pull rod 5, the driving rod 61 can be driven to rotate, and the rotating driving rod 61 will drive the driving block 62, so that the insulating connecting rod 63 pulls the knife switch assembly 10 downward, so that it abuts against the closing assembly 11 to form a closing circuit.

[0047] See also Figure 3 The knife switch assembly 10 includes a gate rod 101, which is fixedly connected to a fixed knife switch 102. One end of the gate rod 101 away from the fixed knife switch 102 is rotatably connected to an outer end of a power terminal 8, and the outer end of the gate rod 101 is rotatably connected to an outer end of an insulating connecting rod 63.

[0048] A slider 105 is fixedly mounted on the bottom end of the movable knife gate 103 , and a sliding groove matching the slider 105 is provided at the outer end of the gate rod 101 , and the movable knife gate 103 is slidably connected to the outer end of the gate rod 101 through the slider 105 .

[0049] The two knife switch assemblies 10 in this solution are used together as a group. The gate rod 101 is connected to the power connection terminal 8 for rotation. A fixed knife switch 102 is fixed on one end of the gate rod 101. At the same time, a sliding groove is provided on the gate rod 101, and a slider 105 is fixed to the bottom of the movable knife switch 103. The movable knife switch 103 is slidably connected to the gate rod 101 through the slider 105. At the same time, there is a gap between the fixed knife switch 102 and the movable knife switch 103. A plurality of telescopic springs 104 are fixed at the gap. The movable knife switch 103 can be pushed outward by the force of the telescopic springs 104, so that it has a tendency to move outward. When it contacts the closing assembly 11 to close the closing assembly, it can contact more tightly. It prevents the gap in the middle from causing poor contact, generating arc damage to parts, and improving the safety of its use.

[0050] See also Figure 4 The closing assembly 11 also includes a gate seat 111, which is fixedly connected to the power terminal 2 9. A bidirectional threaded rod 112 is installed on the inner side of the gate seat 111. The outer ends of the two abutment plates 113 are provided with threaded holes 115. The abutment plates 113 are threadedly connected to the bidirectional threaded rod 112 through the threaded holes 115. A movable block 116 is fixedly connected to the bottom end of the abutment plate 113. Two movable grooves 117 are provided at the bottom end of the gate seat 111. The movable block 116 is slidably connected to the movable groove 117.

[0051] The outer ends of the two abutment plates 113 are fixedly connected with supporting plates 114 , the supporting plates 114 abut against the fixed knife gate 102 , the outer end of the gate seat 111 is fixedly connected with a vertical rod 118 , and the top of the vertical rod 118 is fixedly connected with a guide plate 119 .

[0052] The gate seat 111 in this scheme is fixedly connected to the power terminal 2 9, and two movable grooves 117 are provided on the gate seat 111, and the two abutment plates 113 are slidably connected to the movable grooves 117 through a movable block 116 fixed at the bottom, and a threaded hole 115 is provided on the abutment plate 113, and a bidirectional threaded rod 112 is rotatably installed on the inner side of the gate seat 111, and a pair of threads engraved on the bidirectional threaded rod 112 are arranged in opposite directions, and the two abutment plates 113 are threadedly connected to the two parts of the bidirectional threaded rod 112, so that the spacing between the two abutment plates 113 can be adjusted by rotating the bidirectional threaded rod 112, so that it can better cooperate with the gate knife assembly 10, and the tightness of the abutment between the gate knife assembly 10 and the abutment plate 113 can be further improved.

[0053] A support plate 114 is fixed to the outside of the abutment plate 113, and the gap between the support plate 114 and the abutment plate 113 is slightly smaller than the thickness between the fixed knife gate 102 and the movable knife gate 103, so that the fixed knife gate 102 and the movable knife gate 103 can be stuck between the abutment plate 113 and the support plate 114, and then the movable knife gate 103 is pushed outward by the telescopic spring 104 to make it tightly abutted.

[0054] A vertical rod 118 is also fixed on the top of the gate seat 111, and a guide plate 119 is fixed on the top of the vertical rod 118. The guide plate 119 cooperates with the vertical rod 118 mainly to play a guiding role. When the knife assembly 10 rotates downward, it needs to pass over the guide plate 119. At this time, the guide plate 119 can play a correction role to prevent the knife assembly 10 from deviating from the closing path.

[0055] Working principle: When the vacuum circuit breaker 3 needs to connect the circuit, the knife assembly 10 and the closing assembly 11 need to be closed first. When the pull rod 5 is rotated, the driving rod 61 can be driven to rotate, and the rotating driving rod 61 will drive the driving block 62, so that the insulating connecting rod 63 pulls the knife assembly 10 downward, so that it abuts against the closing assembly 11 to form a closed circuit. At the same time, a plurality of telescopic springs 104 are fixed in the gap between the fixed knife switch 102 and the movable knife switch 103. The movable knife switch 103 can be pushed outward by the action force of the telescopic spring 104. The fixed knife switch 102 and the movable knife switch 103 are stuck between the abutment plate 113 and the support plate 114, and then the movable knife switch 103 is pushed outward by the telescopic spring 104 to make it tightly abutted to prevent poor contact and arcing due to loose structure after long-term use.

Claims

1. A primary-secondary fusion outdoor pole-mounted circuit breaker, comprising a mounting frame (1), an operating mechanism (2) mounted on the top of the mounting frame (1), a plurality of vacuum circuit breakers (3) mounted on the top of the operating mechanism (2), the operating mechanism (2) being used to drive the vacuum circuit breakers (3) to open and close, Features: A plurality of insulators one (12) and two insulators (13) are fixedly mounted on the top of the mounting frame (1), a group of knife blade assemblies (10) are arranged on the top of the plurality of insulators two (13), and a closing assembly (11) is arranged on the top of the plurality of insulators one (12); The knife switch assembly (10) comprises a fixed knife switch (102) and a movable knife switch (103), and a plurality of telescopic springs (104) are fixedly installed between the fixed knife switch (102) and the movable knife switch (103); The closing assembly (11) comprises two abutment plates (113), and the movable knife switch (103) moves outwards through the force of the telescopic spring (104) to abut against the abutment plates (113).

2. The primary and secondary fusion outdoor pole-mounted circuit breaker according to claim 1, characterized in that: A second power connection terminal (9) is fixedly mounted on the top of the first insulator (12), a first power connection terminal (8) is fixedly mounted on the top of the second insulator (13), an insulating sleeve (4) is connected to the top of the vacuum circuit breaker (3) via a copper busbar, the first power connection terminal (8) is connected to the vacuum circuit breaker (3) via a copper busbar, two fixing frames (7) are fixedly mounted on the top of the mounting frame (1), and a driving assembly (6) is mounted between the two fixing frames (7).

3. The primary and secondary fusion outdoor pole-mounted circuit breaker according to claim 2 is characterized in that: The driving assembly (6) comprises a driving rod (61) which is rotatably mounted between the two fixing frames (7); a pull rod (5) is fixedly mounted on one end of the driving rod (61); a plurality of driving blocks (62) are fixedly mounted on the outer end of the driving rod (61); and the outer ends of the driving blocks (62) are rotatably connected to insulating connecting rods (63).

4. The primary and secondary fusion outdoor pole-mounted circuit breaker according to claim 3 is characterized in that: The knife switch assembly (10) comprises a gate rod (101), the gate rod (101) being fixedly connected to the fixed knife switch (102), the end of the gate rod (101) away from the fixed knife switch (102) being rotatably connected to the outer end of the power connection terminal (8), and the outer end of the gate rod (101) being rotatably connected to the outer end of the insulating connecting rod (63).

5. The primary and secondary fusion outdoor pole-mounted circuit breaker according to claim 4 is characterized in that: A slider (105) is fixedly mounted on the bottom end of the movable knife gate (103); a sliding groove matching the slider (105) is provided on the outer end of the gate rod (101); and the movable knife gate (103) is slidably connected to the outer end of the gate rod (101) via the slider (105).

6. The primary and secondary fusion outdoor pole-mounted circuit breaker according to claim 2, characterized in that: The closing assembly (11) further comprises a gate seat (111), the gate seat (111) being fixedly connected to the second power connection terminal (9), a bidirectional threaded rod (112) being installed on the inner side of the gate seat (111), threaded holes (115) being provided at the outer ends of the two abutment plates (113), the abutment plates (113) being threadedly connected to the bidirectional threaded rod (112) via the threaded holes (115), a movable block (116) being fixedly connected to the bottom end of the abutment plates (113), two movable grooves (117) being provided at the bottom end of the gate seat (111), the movable block (116) being slidably connected to the movable grooves (117).

7. The primary and secondary fusion outdoor pole-mounted circuit breaker according to claim 6, characterized in that: The outer ends of the two abutment plates (113) are fixedly connected to support plates (114), the support plates (114) abut against the fixed knife gate (102), the outer end of the gate seat (111) is fixedly connected to a vertical rod (118), and the top end of the vertical rod (118) is fixedly connected to a guide plate (119).

Images