Power-off protection device for over-capacitance protection instrument of power grid transformer and use method of power-off protection device

Abstract

The invention discloses a power-off protection device of a power grid transformer over-capacitance protection instrument and a use method thereof, and relates to the field of power grid equipment. The power-off protection device comprises a mounting base and a pole-mounted vacuum circuit breaker fixedly arranged at the top of the mounting base, a switch-on and switch-off driving shaft is mounted on the pole-mounted vacuum circuit breaker, and a stable labor-saving adjusting structure is arranged at the end of the switch-on and switch-off driving shaft. According to the power-off protection device for the over-capacitance protection instrument of the power grid transformer and the use method of the power-off protection device, a stable labor-saving adjusting structure is arranged at the end part of an opening and closing driving shaft, and during use, two groups of self-resetting pull switches are used for pulling, so that more labor is saved in the opening and closing process, the self-resetting pull switches can be automatically reset after opening and closing, and the power-off protection device is convenient to use. Quick connection with the operating rod each time is facilitated, and opening and closing states are kept through an internal stable locking piece.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid equipment, and in particular to a power-off protection device for an overcapacity protector of a power grid transformer and a use method thereof. Background Art

[0002] The power-off protection device of the power grid transformer overcapacity protector is a device used in the power grid to provide power-off protection for the transformer in the event of overload and overcapacity. This device usually refers to a pole-mounted vacuum circuit breaker, which achieves power-off protection during the opening and closing process of the conductive rod, and at the same time, the arc is eliminated through the arc extinguishing chamber in the pole-mounted vacuum circuit breaker, playing a role in safety protection in the high-voltage line.

[0003] When the existing pole-mounted vacuum circuit breaker is in use, it is usually operated by ground personnel through an operating lever to operate the opening and closing knife control switch on the pole-mounted vacuum circuit breaker for opening and closing. However, in actual use, on the one hand, the opening and closing mechanism of the pole-mounted vacuum circuit breaker becomes loose after long-term use, resulting in an unstable opening and closing state and easy self-slippage. On the other hand, the opening and closing operation needs to be completed quickly, while the existing opening and closing knife is unreasonable in design, which is not convenient for rapid operation of the lever for quick connection and is very laborious to pull. Therefore, a power-off protection device of an overcapacity protector for a power grid transformer and a method for using the same are provided to solve the above problems. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a power-off protection device for an overcapacity protector of a power grid transformer and a method for using the same, which solves the problems that, in actual use, on the one hand, the opening and closing mechanism of a pole-mounted vacuum circuit breaker becomes loose after long-term use, resulting in an unstable opening and closing state and prone to self-slippage; and on the other hand, the opening and closing operations need to be completed quickly, while the existing opening and closing knife design is unreasonable and it is not convenient to quickly operate the lever for quick connection.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A power-off protection device for an overcapacity protection instrument of a power grid transformer, comprising a mounting base and a pole-mounted vacuum circuit breaker fixedly arranged on the top of the mounting base, an opening and closing drive shaft is installed on the pole-mounted vacuum circuit breaker, and a stable and labor-saving adjustment structure is arranged at the end of the opening and closing drive shaft, and the stable and labor-saving adjustment structure includes;

[0006] A stable locking member, the stable locking member comprises a locking seat fixedly arranged at the end of the opening and closing drive shaft, and locking pins are embedded on both sides of the locking seat;

[0007] A labor-saving driving component, which includes a passive large gear fixedly arranged at the end of a drive shaft for opening and closing the gate, a driving small gear meshing with the passive large gear being arranged on one side of the passive large gear, and driving racks connected to the driving small gear in a transmission manner are arranged on both sides of the driving small gear, and two groups of self-resetting pull switches for opening and closing the gate are arranged at the bottom of the mounting base, and the two groups of self-resetting pull switches are respectively connected to the two groups of driving racks.

[0008] Preferably, the pole-mounted vacuum circuit breaker comprises:

[0009] An equipment seat, which is fixedly arranged on one side of the top of the mounting base;

[0010] The vacuum interrupter is fixedly mounted on the top of the equipment base;

[0011] A current transformer, which is fixedly installed on the outer wall of the vacuum interrupter;

[0012] A support frame, which is fixedly arranged on the front side of the equipment seat;

[0013] An electric connection support column is fixedly arranged on the support frame;

[0014] One end of the conductive rod is movably hinged to the top of the power connection pillar, and the other end of the conductive rod is movably connected to the current transformer.

[0015] Preferably, an operating insulator is movably hinged on the lower middle surface of the conductive rod, the opening and closing drive shaft is rotatably connected to the middle of the support frame, a flip support rod is fixedly installed on the outer surface of the opening and closing drive shaft, and the other end of the flip support rod is movably hinged to the bottom end of the operating insulator.

[0016] Preferably, locking shells are fixedly provided inside both ends of the support frame, the locking seat is rotatably connected in the locking shell, the end of the opening and closing drive shaft passes through the locking shell, and the locking pins are arranged on both sides of the locking shell.

[0017] Preferably, a positioning shaft is fixedly provided inside the locking shell, the end of the positioning shaft is movably inserted in the locking pin, a locking spring is movably sleeved on the outer surface of the positioning shaft, a locking groove is provided on the outer surface of the locking seat, and the end of the locking pin is movably inserted in the lock groove.

[0018] Preferably, a labor-saving outer cover shell is fixedly installed on the outer surface of the locking shell, the passive large gear and the driving pinion are both rotatably connected in the labor-saving outer cover shell, and a connecting gear is coaxially fixedly arranged on the outer surface of the driving pinion, and the two sides of the connecting gear are respectively meshed with two sets of driving racks.

[0019] Preferably, slide rails are fixedly provided on both sides of the inner wall of the locking housing, a reset spring is movably sleeved on the outer surface of the bottom end of the slide rail, and one side of the top end of the self-resetting pull switch is movably sleeved on the outer surface of the top end of the slide rail.

[0020] Preferably, an anti-detachment connection block is fixedly provided at the bottom end of the driving rack, a connection groove is provided in the middle of the top end of the self-resetting pull switch, and the anti-detachment connection block is slidably connected in the connection groove.

[0021] Preferably, the bottom end of the self-resetting pull switch passes through to the bottom of the mounting base, the self-resetting pull switch is L-shaped, and an anti-dropping hanging groove is provided on the inner side of the bottom end of the self-resetting pull switch.

[0022] Preferably, a method for using a power-off protection device of an overcapacity protection instrument for a power grid transformer comprises the following steps;

[0023] S1. Connect the operating rod. Place the top of the operating rod close to the lower surface of the mounting base and slide it from the left side to the middle, so that it enters the inner bottom of the left self-reset pull switch. At this time, the hook of the operating rod enters the anti-dropping hanging groove;

[0024] S2, gate opening action, pull the operating lever downward, so that one side of the driving rack slides downward, and the driving small gear is driven to rotate coaxially through the connecting gear, so that the passive large gear rotates slowly, realizing labor-saving gate opening;

[0025] S3, closing action, slide the operating lever from the right to the middle to connect with another set of self-resetting pull switches, pull it downward to make the passive large gear rotate slowly in the opposite direction to achieve labor-saving closing.

[0026] The invention discloses a power-off protection device for an overcapacity protection instrument of a power grid transformer and a use method thereof, which has the following beneficial effects:

[0027] 1. The power-off protection device of the overcapacity protection instrument of the power grid transformer and the use method thereof are as follows: the top end of the operating rod is tightly pressed against the lower surface of the mounting base and slid from the left to the middle, so that it enters the inner bottom of the left self-resetting pull switch. At this time, the hook of the operating rod enters the anti-detachment hanging groove and then moves downward. At this time, the self-resetting pull switch pulls the driving rack on its top to move downward through the anti-detachment connecting block. At this time, the driving rack drives the connecting gear to rotate, and the connecting gear drives the driving pinion to rotate. The driving pinion meshes with the passive large gear, thereby driving the opening and closing drive shaft to rotate, thereby realizing the opening of the gate, thereby achieving the purpose of labor saving.

[0028] 2. The power-off protection device of the overcapacity protection instrument for the power grid transformer and the method of using the same, as the self-resetting pull switch moves downward, the reset spring on its side is pushed downward to be compressed, and after the operation is completed, the self-resetting pull switch is released. At this time, the self-resetting pull switch is reset upward to the initial point under the action of the reset spring, and at the same time, when the connecting gear rotates, it will drive the driving rack on the other side to slide upward, and at this time, the anti-detachment connection block on this side slides upward to the top inside the connecting groove, waiting for the closing operation, so that the two sets of self-resetting pull switches for opening and closing can automatically reset and fit under the installation base after the operation is completed, so that the operation connection can be quickly completed during use.

[0029] 3. The power-off protection device of the overcapacity protector of the power grid transformer and its use method, during the rotation of the opening and closing drive shaft, the locking seats at both ends are synchronously driven to rotate, so that the locking seats push the locking pins on both sides outward, and the locking spring is compressed at this time. At this time, the locking pin moves out from the inside of the lock groove on one side, and when the locking seat is reversely rotated 90 degrees to open the gate, the locking pin enters the other set of lock grooves for fixation, thereby maintaining the opening and closing state of the entire pole-mounted vacuum circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a schematic diagram of the overall outer surface structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the overall bottom structure of the present invention;

[0033] Figure 3 It is a cross-sectional view of the structure in the side wall of the support frame of the present invention;

[0034] Figure 4 This is a schematic diagram of the structure of the stable and labor-saving adjustment structure of the present invention;

[0035] Figure 5 This is a schematic diagram of the structure of the labor-saving driving member of the present invention;

[0036] Figure 6 It is a schematic diagram of the structure of the stable locking member of the present invention.

[0037] In the figure: 1. mounting base; 2. pole-mounted vacuum circuit breaker; 21. equipment base; 22. vacuum interrupter; 23. current transformer; 24. power connection pillar; 25. conductive rod; 26. operating insulator; 27. opening and closing drive shaft; 28. support frame; 29. ​​flip support rod; 3. stable and labor-saving adjustment structure; 31. stable locking piece; 311. locking shell; 312. locking seat; 313. locking groove; 314. locking pin; 315. positioning shaft; 316. locking spring; 32. labor-saving driving piece; 321. labor-saving piece outer cover shell; 322. self-resetting pull switch; 323. passive large gear; 324. driving small gear; 325. connecting gear; 326. driving rack; 327. anti-drop connection block; 328. connecting groove; 329. slide rail; 3210. reset spring; 3211. anti-drop hanging groove. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] The embodiment of the present application provides a power-off protection device for an overcapacity protector of a power grid transformer and a method for using the same, thereby solving the problems that, in actual use, on the one hand, the opening and closing mechanism of the pole-mounted vacuum circuit breaker becomes loose after long-term use, resulting in an unstable opening and closing state and prone to self-slippage; and on the other hand, the opening and closing operations need to be completed quickly, while the existing opening and closing knife design is unreasonable and it is not convenient to quickly operate the lever for quick connection.

[0040] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] The embodiment of the invention discloses a power failure protection device of an overcapacity protection instrument for a power grid transformer and a use method thereof.

[0042] According to the attached Figure 1-6As shown, it includes a mounting base 1 and a pole-mounted vacuum circuit breaker 2 fixedly arranged on the top of the mounting base 1. The pole-mounted vacuum circuit breaker 2 includes an equipment base 21, a vacuum interrupter 22, a current transformer 23, a power connection support 24, a conductive rod 25, an operating insulator 26, an opening and closing drive shaft 27, a support frame 28 and a flip support rod 29. The equipment base 21 is fixedly arranged on one side of the top of the mounting base 1; the vacuum interrupter 22 is fixedly installed on the top of the equipment base 21; the current transformer 23 is fixedly installed on the outer wall of the vacuum interrupter 22; the support The frame 28 is fixedly arranged on the front side of the equipment seat 21; the power connection pillar 24 is fixedly arranged on the support frame 28, one end of the conductive rod 25 is movably hinged to the top of the power connection pillar 24, the other end of the conductive rod 25 is movably connected to the current transformer 23, and the operating insulator 26 is movably hinged on the lower surface of the middle part of the conductive rod 25. The opening and closing drive shaft 27 is rotatably connected to the middle part of the support frame 28, and a flip support rod 29 is fixedly installed on the outer surface of the opening and closing drive shaft 27, and the other end of the flip support rod 29 is movably hinged to the bottom end of the operating insulator 26.

[0043] The end of the gate opening and closing drive shaft 27 is provided with a stable and labor-saving adjustment structure 3, which includes a stable locking member 31 and a labor-saving drive member 32;

[0044] The stabilizing locking member 31 includes a locking seat 312 fixedly arranged at the end of the opening and closing drive shaft 27, and locking pins 314 are embedded on both sides of the locking seat 312; the labor-saving driving member 32 includes a passive large gear 323 fixedly arranged at the end of the opening and closing drive shaft 27, and a driving pinion 324 meshing with the passive large gear 323 is arranged on one side, and a driving rack 326 drivingly connected to the driving pinion 324 is arranged on both sides of the driving pinion 324, and two groups of self-resetting pull switches 322 for opening and closing the gates are arranged at the bottom of the mounting base 1, and the two groups of self-resetting pull switches 322 are respectively connected to the two groups of driving racks 326.

[0045] A locking shell 311 is fixedly installed inside both ends of the support frame 28, the locking seat 312 is rotatably connected in the locking shell 311, the end of the opening and closing drive shaft 27 passes through the locking shell 311, and the locking pins 314 are arranged on both sides of the locking shell 311.

[0046] A positioning shaft 315 is fixedly arranged inside the locking shell 311, and the end of the positioning shaft 315 is movably inserted in the locking pin 314. A locking spring 316 is movably sleeved on the outer surface of the positioning shaft 315. A locking groove 313 is formed on the outer surface of the locking seat 312, and the end of the locking pin 314 is movably inserted in the locking groove 313.

[0047] A labor-saving outer cover shell 321 is fixedly installed on the outer surface of the locking shell 311, and the passive large gear 323 and the driving small gear 324 are both rotatably connected in the labor-saving outer cover shell 321. A connecting gear 325 is coaxially fixed on the outer surface of the driving small gear 324, and the two sides of the connecting gear 325 are respectively meshed with two sets of driving racks 326.

[0048] Slide rails 329 are fixedly provided on both sides of the inner wall of the locking shell 311 , and a reset spring 3210 is movably sleeved on the outer surface of the bottom end of the slide rail 329 , and one side of the top end of the self-resetting pull switch 322 is movably sleeved on the outer surface of the top end of the slide rail 329 .

[0049] An anti-dropout connection block 327 is fixedly provided at the bottom end of the driving rack 326 , and a connection groove 328 is provided in the middle of the top end of the self-resetting pull switch 322 , in which the anti-dropout connection block 327 is slidably connected.

[0050] The bottom end of the self-resetting pull switch 322 extends through the bottom of the mounting base 1. The self-resetting pull switch 322 is L-shaped. An anti-drop hanging groove 3211 is provided on the inner side of the bottom end of the self-resetting pull switch 322.

[0051] Working principle: When the device is in use, when it is necessary to open and close the gate, the top of the operating rod is pressed against the lower surface of the mounting base 1 and slid from the left to the middle, so that it enters the inner bottom of the left self-resetting pull switch 322. At this time, the hook of the operating rod enters the anti-detachment hanging groove 3211 and then moves downward. At this time, the self-resetting pull switch 322 pulls the driving rack 326 at its top to move downward through the anti-detachment connecting block 327. At this time, the driving rack 326 drives the connecting gear 325 to rotate, and the connecting gear 325 drives the driving pinion 324 to rotate. The driving pinion 324 meshes with the passive large gear 323, thereby driving the opening and closing drive shaft 27 to rotate, thereby opening the gate, thereby achieving the purpose of labor saving.

[0052] At the same time, during the above operation process, as the self-resetting pull switch 322 moves downward, the reset spring 3210 on its side is pushed downward to be compressed. After the operation is completed, the self-resetting pull switch 322 is released. At this time, the self-resetting pull switch 322 is reset to the initial point upward under the action of the reset spring 3210. At the same time, when the connecting gear 325 rotates, it will drive the driving rack 326 on the other side to slide upward. At this time, the anti-detachment connecting block 327 on this side slides upward to the top inside the connecting groove 328, waiting for the closing operation, so that the two sets of self-resetting pull switches 322 for opening and closing the switch can automatically reset and fit under the mounting base 1 after the operation is completed, so that the operation connection can be quickly completed when in use;

[0053] At the same time, during the rotation of the opening and closing drive shaft 27, the locking seats 312 at both ends are synchronously driven to rotate, so that the locking seats 312 push the locking pins 314 on both sides outward. At this time, the locking spring 316 is compressed, and the locking pin 314 moves out from the inside of the locking groove 313 on one side. When the locking seat 312 rotates 90 degrees in the opposite direction to open the gate, the locking pin 314 enters the other set of locking grooves 313 for fixation, thereby maintaining the opening and closing state of the entire pole-mounted vacuum circuit breaker 2.

[0054] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A power-off protection device for an overcapacity protection instrument of a power grid transformer, comprising a mounting base (1) and a column-mounted vacuum circuit breaker (2) fixedly arranged on the top of the mounting base (1), characterized in that: The pole-mounted vacuum circuit breaker (2) is provided with an opening and closing drive shaft (27), and the end of the opening and closing drive shaft (27) is provided with a stable and labor-saving adjustment structure (3), and the stable and labor-saving adjustment structure (3) comprises: A stable locking member (31), the stable locking member (31) comprising a locking seat (312) fixedly arranged at the end of the gate opening and closing drive shaft (27), and locking pins (314) are embedded on both sides of the locking seat (312); A labor-saving driving member (32), the labor-saving driving member (32) comprising a passive large gear (323) fixedly arranged at the end of a drive shaft (27) for opening and closing the gate, a driving pinion (324) meshing with the passive large gear (323) being arranged on one side of the passive large gear (323), a driving rack (326) drivingly connected to the driving pinion (324) being arranged on both sides of the driving pinion (324), and two groups of self-resetting pull switches (322) for opening and closing the gate being arranged at the bottom of the mounting base (1), the two groups of the self-resetting pull switches (322) being connected to the two groups of driving racks (326) respectively.

2. A power failure protection device for overcapacity protection of power grid transformer according to claim 1, characterized in that: The pole-mounted vacuum circuit breaker (2) comprises: An equipment seat (21) is fixedly arranged on one side of the top of the mounting base (1); A vacuum interrupter (22) is fixedly mounted on the top of the equipment base (21); A current transformer (23) fixedly mounted on the outer wall of the vacuum interrupter (22); A support frame (28) fixedly disposed on the front side of the equipment seat (21); A power connection support (24) fixedly mounted on a support frame (28); One end of the conductive rod (25) is movably hinged to the top of the power connection support (24), and the other end of the conductive rod (25) is movably connected to the current transformer (23).

3. A power failure protection device for overcapacity protection of power grid transformer according to claim 2, characterized in that: An operating insulator (26) is movably hinged on the lower surface of the middle of the conductive rod (25); the switch opening and closing drive shaft (27) is rotatably connected to the middle of the support frame (28); a flip support rod (29) is fixedly installed on the outer surface of the switch opening and closing drive shaft (27); and the other end of the flip support rod (29) is movably hinged to the bottom end of the operating insulator (26).

4. A power failure protection device for overcapacity protection of power grid transformer according to claim 2, characterized in that: A locking housing (311) is fixedly disposed inside both ends of the support frame (28), the locking seat (312) is rotatably connected in the locking housing (311), the end of the opening and closing drive shaft (27) passes through the locking housing (311), and the locking latch (314) is disposed on both sides inside the locking housing (311).

5. A power failure protection device for overcapacity protection of power grid transformer according to claim 4, characterized in that: A positioning shaft (315) is fixedly arranged inside the locking housing (311), and the end of the positioning shaft (315) is movably inserted into the locking pin (314). A locking spring (316) is movably sleeved on the outer surface of the positioning shaft (315). A locking groove (313) is formed on the outer surface of the locking seat (312), and the end of the locking pin (314) is movably inserted into the locking groove (313).

6. A power failure protection device for overcapacity protection of power grid transformer according to claim 4, characterized in that: A labor-saving outer cover shell (321) is fixedly mounted on the outer surface of the locking shell (311); the passive large gear (323) and the driving pinion (324) are both rotatably connected in the labor-saving outer cover shell (321); a connecting gear (325) is coaxially fixedly mounted on the outer surface of the driving pinion (324); and two sides of the connecting gear (325) are respectively meshed with two sets of driving racks (326).

7. A power failure protection device for overcapacity protection of power grid transformer according to claim 6, characterized in that: Slide rails (329) are fixedly provided on both sides of the inner wall of the locking housing (311), a reset spring (3210) is movably sleeved on the outer surface of the bottom end of the slide rail (329), and a top side of the self-resetting pull switch (322) is movably sleeved on the outer surface of the top end of the slide rail (329).

8. A power failure protection device for overcapacity protection of power grid transformer according to claim 7, characterized in that: An anti-detachment connection block (327) is fixedly provided at the bottom end of the driving rack (326), a connection groove (328) is provided in the middle of the top end of the self-resetting pull switch (322), and the anti-detachment connection block (327) is slidably connected in the connection groove (328).

9. A power failure protection device for overcapacity protection of power grid transformer according to claim 8, characterized in that: The bottom end of the self-resetting pull switch (322) passes through the bottom of the mounting base (1); the self-resetting pull switch (322) is L-shaped; and an anti-detachment hanging groove (3211) is provided on the inner side of the bottom end of the self-resetting pull switch (322).

10. The method for using the power failure protection device of the overcapacity protection instrument of a power grid transformer according to any one of claims 1 to 9, characterized in that: The steps include: S1, connecting the operating rod, making the top end of the operating rod close to the lower surface of the mounting base (1) and sliding it from the left side to the middle, so that it enters the inner bottom of the left self-resetting pull switch (322), and at this time, the hook of the operating rod enters the anti-dropping hanging groove (3211); S2, gate opening action, pull the operating lever downward, so that the driving rack (326) on one side slides downward, and drives the driving pinion (324) to rotate coaxially through the connecting gear (325), so that the passive large gear (323) rotates slowly, realizing labor-saving gate opening; S3, closing action, slide the operating rod from the right side to the middle to connect with another set of self-resetting pull switches (322), and pull it downward to make the passive large gear (323) rotate slowly in the reverse direction, so as to achieve labor-saving closing.

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