Operating mechanism for vacuum circuit breaker

Abstract

The utility model discloses an operating mechanism for a vacuum circuit breaker, which comprises a rack, the rack is provided with a rotatable main shaft and a fixed shaft, the fixed shaft is provided with a screw rod, the screw rod is in threaded connection with a first connecting piece, the main shaft is provided with a crank arm, the crank arm is provided with a rotatable second connecting piece, and the second connecting piece is provided with a second connecting piece. A first elastic piece is arranged between the first connecting piece and the second connecting piece, the first connecting piece and the second connecting piece are provided with connecting parts and are arranged in the first elastic piece, and a second elastic piece is arranged between the connecting parts. By improving the structures of the first connecting piece and the second connecting piece, the second elastic piece is arranged in the first elastic piece, the size of the operating mechanism is reduced, meanwhile, sufficient energy release and energy storage can be guaranteed, the release amount of stored energy of the first elastic piece and the second elastic piece is further changed by adjusting the position of the first connecting piece, and the operating efficiency is improved. And the product has the advantages of quick breaking, long service life, adjustability and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage equipment, in particular to an operating mechanism for a vacuum circuit breaker. Background Art

[0002] High-voltage vacuum circuit breakers are the main accessories widely used in high-voltage distribution systems. They can be used for the control and protection of electrical facilities in industrial and mining enterprises and substations. The existing high-voltage vacuum circuit breakers mainly include three independently arranged vacuum arc extinguishing chambers, operating mechanisms and other components. The vacuum arc extinguishing chambers are installed in tubular insulating cylinders, and the three insulating cylinders equipped with arc extinguishing chambers are placed at the rear of the circuit breaker frame. The operating mechanism is arranged at the front of the circuit breaker frame, and the arc extinguishing chambers are connected by insulating pull rods and the output crank arms of the mechanism.

[0003] Among the operating mechanisms for high-voltage vacuum circuit breakers, the spring operating mechanism is still relatively common. The spring operating mechanism is an operating mechanism that uses a spring as a power element to perform opening and closing operations on the circuit breaker. It can well achieve the required power matching characteristics of the circuit breaker, and is reliable in operation and strong in visibility. It is mostly used in medium and small-sized circuit breakers and is the development direction.

[0004] With the overall volume reduction of the spring operating mechanism, the energy release intensity of the spring operating mechanism is reduced, and thus the rapid opening of the vacuum circuit breaker cannot be completed. There is a lag during opening, which not only cannot quickly extinguish the arc, but also reduces the service life of the spring operating mechanism and the high-voltage vacuum circuit breaker. Therefore, the applicant has made a beneficial design and found a method to solve the above problems. The technical solution to be introduced below was generated under this background. Summary of the Invention

[0005] The purpose of the utility model is to overcome the deficiencies existing in the design of the above traditional spring operating mechanism, and provide a product with rapid breaking, long service life and adjustable performance.

[0006] To solve the above problems, the utility model adopts the following technical solutions.

[0007] An operating mechanism for a vacuum circuit breaker includes a frame. The frame is provided with a rotatable main shaft and a fixed shaft. The fixed shaft is provided with a screw rod, and the screw rod is threadedly connected with a first connecting member. The main shaft is provided with a crank arm, and the crank arm is provided with a rotatable second connecting member. A first elastic member is arranged between the first connecting member and the second connecting member. The first connecting member and the second connecting member are provided with connecting portions and are arranged inside the first elastic member. A second elastic member is arranged between the connecting portions.

[0008] Preferably, the first connecting member and the second connecting member are provided with a plurality of first through holes for the first elastic member to pass through, and the connecting portions are provided with a plurality of second through holes for the second elastic member to pass through.

[0009] Preferably, support parts are provided on both sides of the first connecting member and abut against the first elastic member. The first connecting member is provided with a threaded hole, the screw is threadedly connected to the threaded hole, and the connecting part of the first connecting member is provided with a clearance through hole and is arranged below the threaded hole.

[0010] Preferably, the main shaft is provided with a large gear, a first cam is provided on one side of the large gear, a second cam is provided on the other side of the large gear, the second cam is provided with a top, a resistance part is provided on one side of the second cam, the large gear is provided with a first pawl, and the first pawl is arranged on the movable track of the top.

[0011] Preferably, a reduction motor is provided on one side of the frame, and a small gear is provided on the rotating shaft of the reduction motor and meshes with the large gear.

[0012] Preferably, the frame is also provided with a circuit breaker main shaft, an opening shaft, a closing latch, and a holding latch. One end of the circuit breaker main shaft is hinged to the opening shaft. The opening shaft is provided with an opening crank arm. The holding latch abuts against the opening crank arm. The holding latch moves in conjunction with the opening latch. The closing latch is arranged on the moving track of the abutment portion, and the opening crank arm is arranged on the moving track of the first cam.

[0013] Preferably, the first elastic member and the second elastic member are configured as springs.

[0014] Beneficial effects:

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The utility model improves the structure of the first connecting member and the second connecting member and places the second elastic member inside the first elastic member, so that the operating mechanism can reduce the volume while ensuring sufficient energy release and energy storage, thereby accelerating the opening speed and reducing the time required for opening, thereby improving the service life of the product; and, by rotating to adjust the distance between the first connecting member and the second connecting member, the release amount of the stored energy of the first elastic member and the second elastic member can be changed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of an operating mechanism for a vacuum circuit breaker of the present utility model;

[0018] Figure 2 This is a side cross-sectional diagram of the operating mechanism of a vacuum circuit breaker in the present invention. Figure 1 ;

[0019] Figure 3 This is a side cross-sectional diagram of the operating mechanism of a vacuum circuit breaker in the present invention.Figure 2 ;

[0020] Figure 4 This is an exploded view of an operating mechanism for a vacuum circuit breaker of the present utility model;

[0021] The corresponding relationships between the reference numerals and component names in the figure are as follows:

[0022] Reference numerals: 1, frame; 2, main shaft; 3, fixed shaft; 4, first elastic member; 5, connecting portion; 6, first through hole; 7, reduction motor;

[0023] 11, circuit breaker main shaft; 12, opening rotating shaft; 13, closing detent; 14, holding detent; 15, opening detent;

[0024] 21, crank arm; 22, second connecting member; 23, large gear; 24, first cam; 25, second cam; 26, top; 27, abutting portion; 28, first detent;

[0025] 31, screw; 32, first connecting member; 33, supporting portion; 34, threaded hole;

[0026] 51, second elastic member; 52, second through hole; 53, relief through hole;

[0027] 71, small gear. Detailed implementation manners

[0028] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0029] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0030] In the embodiments of the present utility model, "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0031] Reference example Figures 1 to 4, An operating mechanism for a vacuum circuit breaker, including a frame 1, the frame 1 is provided with a rotatable main shaft 2 and a fixed shaft 3, the fixed shaft 3 is provided with a screw 31, the screw 31 is threadedly connected with a first connecting member 32, the main shaft 2 is provided with a crank arm 21, the crank arm 21 is provided with a rotatable second connecting member 22, a first elastic member 4 is arranged between the first connecting member 32 and the second connecting member 22, the first connecting member 32 and the second connecting member 22 are provided with connecting portions 5 and are arranged inside the first elastic member 4, a second elastic member 51 is arranged between the connecting portions 5. Through the structural improvement of the first connecting member 32 and the second connecting member 22, the size of the connecting portion 5 is smaller than the inner diameter of the second elastic member 51, so that the second elastic member 51 is placed inside the first elastic member 4, and the actions of the two during compression and release do not interfere with each other. While reducing the volume of the operating mechanism, it can also ensure sufficient energy release and energy storage, accelerate the opening speed and reduce the time required for opening, and improve the service life of the product; and by rotating and adjusting the position of the first connecting member 32 on the screw 31, the distance between the first connecting member 32 and the second connecting member 22 is changed, and further the release amount of the energy storage of the first elastic member 4 and the second elastic member 51 is changed;

[0032] It is worth mentioning that the first connecting member 32 and the second connecting member 22 are provided with a number of first through holes 6 for the first elastic member 4 to pass through, the connecting portion 5 is provided with a number of second through holes 52 for the second elastic member 51 to pass through, and the first through holes 6 and the second through holes 52 make the first elastic member 4 and the second elastic member 51 respectively connected stably with the first connecting member 32 and the second connecting member 22;

[0033] It is worth mentioning that both sides of the first connecting member 32 are provided with supporting portions 33 and abut against the first elastic member 4, the first connecting member 32 is provided with a threaded hole 34, the screw 31 is threadedly connected to the threaded hole 34, the connecting portion 5 of the first connecting member 32 is provided with a relief through hole 53 and is arranged below the threaded hole 34. The supporting portions 33 facilitate the user to rotate the first connecting member 32, the threaded hole 34 is used in cooperation with the screw 31, and the first elastic member 4 and the second elastic member 51 also make the threaded hole 34 and the screw 31 tightly abut against each other, increasing the friction between the two and improving the connection stability. The relief through hole 53 is used in cooperation with the screw 31 to limit the movement range of the first connecting member 32;

[0034] It is worth mentioning that the main shaft 2 is provided with a large gear 23. On one side of the large gear 23, there is a first cam 24. On the other side of the large gear 23, there is a second cam 25. The second cam 25 has a top 26. On one side of the second cam 25, there is a contact part 27. The large gear 23 is provided with a first detent 28. The first detent 28 is arranged on the moving track of the top 26. The first cam 24 triggers the disassembly of the opening detent 15. When the first elastic member 4 and the second elastic member 51 are fully energized, in order to prevent the main shaft 2 from continuing to rotate due to inertia, at this time, the first detent 28 will abut against the top 26 to prevent the large gear 23 and the main shaft 2 from rotating. After the energy storage is completed, the contact part 27 pushes the closing detent 13 to move and triggers the closing electromagnet on the frame 1 to inform the user that the closing is completed;

[0035] It is worth mentioning that on one side of the frame 1, there is a reduction motor 7. The rotating shaft of the reduction motor 7 is provided with a small gear 71, which meshes with the large gear 23. The reduction motor 7 drives the small gear 71 to rotate, and the small gear 71 drives the large gear 23 to rotate together;

[0036] It is worth mentioning that the frame 1 is also provided with a circuit breaker main shaft 112, an opening rotating shaft 12, a closing detent 13, and a holding detent 14. One end of the circuit breaker main shaft 112 is hinged to the opening rotating shaft 12. The opening rotating shaft 12 is provided with an opening toggle arm 21. The holding detent 14 abuts against the opening toggle arm 21. The holding detent 14 and the opening detent 15 are linked to move. The closing detent 13 is arranged on the moving track of the contact part 27. The opening toggle arm 21 is arranged on the moving track of the first cam 24. During the energy storage process, as the large gear 23 rotates, the first cam 24 pushes the opening toggle arm 21 to rotate, thereby driving the circuit breaker main shaft 112 to rotate. At this time, the opening toggle arm 21 is located on the moving track of the first cam 24. When the closing detent 13 abuts against the contact part 27, the opening toggle arm 21 abuts against the first cam 24. The holding detent 14 presses down against the opening toggle arm 21 to form a holding point between the opening toggle arm 21 and the holding detent 14. At the same time, the opening detent 15 moves together with the holding detent 14, so that the opening detent 15 is located on the moving track of the moving iron core of the opening electromagnet on one side of the frame 1. When the opening electromagnet is triggered, the moving iron core pushes the opening detent 15 to move, and the holding detent 14 leaves the opening toggle arm 21. Since the holding point between the holding detent 14 and the opening toggle arm 21 is disassembled, the first elastic member 4 and the second elastic member 51 release energy, causing the main shaft 2 to rotate rapidly. The first cam 24 pushes the opening toggle arm 21 to rotate, and the opening toggle arm 21 drives the circuit breaker main shaft 112 to rotate. The circuit breaker main shaft 112 can be connected and linked with the main shaft 2 in the vacuum circuit breaker to control the opening or closing of the vacuum circuit breaker;

[0037] It is worth mentioning that the first elastic member 4 and the second elastic member 51 are set as springs, and the springs use circular cross-section cylindrical helical compression springs.

[0038] Through the above design scheme, the product can achieve the advantages of rapid breaking, long service life, and adjustability.

[0039] The above content is a further detailed description of the present utility model in combination with specific implementation manners. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, which should all be regarded as falling within the protection scope determined by the claims submitted for the present utility model.

Claims

1. An operating mechanism for a vacuum circuit breaker, comprising a frame (1), wherein the frame (1) is provided with a rotatable main shaft (2) and a fixed shaft (3), and is characterized in that: The fixed shaft (3) is provided with a screw rod (31), and the screw rod (31) is threadedly connected to a first connecting member (32). The main shaft (2) is provided with a crank arm (21), and the crank arm (21) is provided with a rotatable second connecting member (22). A first elastic member (4) is provided between the first connecting member (32) and the second connecting member (22). The first connecting member (32) and the second connecting member (22) are provided with a connecting portion (5) and are arranged in the first elastic member (4). A second elastic member (51) is provided between the connecting portions (5).

2. The operating mechanism for a vacuum circuit breaker according to claim 1, characterized in that: The first connecting member (32) and the second connecting member (22) are provided with a plurality of first through holes (6) for the first elastic member (4) to pass through, and the connecting portion (5) is provided with a plurality of second through holes (52) for the second elastic member (51) to pass through.

3. The operating mechanism for a vacuum circuit breaker according to claim 2, characterized in that: Support portions (33) are provided on both sides of the first connecting member (32) and abut against the first elastic member (4); the first connecting member (32) is provided with a threaded hole (34); the screw rod (31) is threadedly connected to the threaded hole (34); the connecting portion (5) of the first connecting member (32) is provided with a clearance through hole (53) and is arranged below the threaded hole (34).

4. The operating mechanism for a vacuum circuit breaker according to claim 1, characterized in that: The main shaft (2) is provided with a large gear (23), a first cam (24) is provided on one side of the large gear (23), a second cam (25) is provided on the other side of the large gear (23), the second cam (25) is provided with a top (26), a resistance portion (27) is provided on one side of the second cam (25), and the large gear (23) is provided with a first pawl (28), and the first pawl (28) is arranged on a movable track of the top (26).

5. The operating mechanism for a vacuum circuit breaker according to claim 4, characterized in that: A reduction motor (7) is provided on one side of the frame (1), and a small gear (71) is provided on the rotating shaft of the reduction motor (7) and meshes with the large gear (23).

6. The operating mechanism for a vacuum circuit breaker according to claim 4, characterized in that: The frame (1) is further provided with a circuit breaker main shaft (11), a trip shaft (12), a closing latch (13), a holding latch (14), and a trip latch (15); one end of the circuit breaker main shaft (11) is hinged to the trip shaft (12); the trip shaft (12) is provided with a trip crank arm (21); the holding latch (14) abuts against the trip crank arm (21); the holding latch (14) and the trip latch (15) move in conjunction; the closing latch (13) is arranged on the moving track of the abutting portion (27); and the trip crank arm (21) is arranged on the moving track of the first cam (24).

7. The operating mechanism for a vacuum circuit breaker according to any one of claims 2 to 6, characterized in that: The first elastic member (4) and the second elastic member (51) are configured as springs.

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