Circuit breaker switch with double fractures

Abstract

The utility model discloses a circuit breaker switch with double fractures, which comprises a rack and a hexagonal insulating shaft rotatably mounted on the rack, an upper static contact is arranged at the top of the inner wall of the rack, a mounting plate is arranged on the rear side of the rack, a grounding contact is mounted on the mounting plate, and a solid-sealed polar pole is arranged at the bottom of the rack. A lower static contact is installed at the top of the solid-sealed polar pole, a plurality of moving contact mechanisms capable of rotating along with the hexagonal insulating shaft are arranged on the outer side of the hexagonal insulating shaft in the length direction, each moving contact mechanism comprises a connecting cylinder arranged on the hexagonal insulating shaft in a sleeving mode, a crank arm is arranged on the outer side of each connecting cylinder, moving contact bodies are symmetrically installed in the crank arms, and the moving contact bodies are connected with the connecting cylinders in a sleeving mode. According to the utility model, the moving contact body is of the arc-shaped structure, so that the stress dispersion of the moving contact body is more uniform, local stress concentration is avoided, and local fatigue is not easy to generate, thereby prolonging the service life of the moving contact body, improving an electric field, enabling the distribution of the electric field to be more uniform, and improving the voltage-withstanding insulation level of a fracture.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit breaker technical field, concretely is a circuit breaker switch with double breaking face. BACKGROUND

[0002] The circuit breaker switch includes a disconnector and a circuit breaker, in the ring network cabinet, the circuit breaker switch adopts the bus side three-position disconnector structure, the three-position disconnector and the circuit breaker adopt integrated design, in order to improve the safety and reliability of ring network cabinet, will use double breaking face structure.

[0003] The movable contact of the existing circuit breaker switch is usually a straight-line contact, the straight-line contact is prone to local fatigue damage due to stress concentration, thereby leading to shorter service life. SUMMARY

[0004] The utility model discloses a circuit breaker switch with double breaking face to solve the problem in the background art.

[0005] To achieve the above object, the utility model provides the following technical scheme: a circuit breaker switch with double breaking face, including frame and hexagonal insulating shaft that rotates and installs on the frame, the top of frame inner wall is equipped with upper static contact, the rear side of frame is equipped with mounting plate, the mounting plate is installed with grounding contact, the bottom of frame is equipped with solid seal pole, the top of solid seal pole is installed with lower static contact, the outside of hexagonal insulating shaft is equipped with a plurality of movable contact mechanism that can rotate with hexagonal insulating shaft along the length direction, movable contact mechanism includes the connecting barrel of the hexagonal insulating shaft, the outside of connecting barrel is equipped with the elbow arm, the inside symmetry of elbow arm is installed with movable contact body, the middle part of connecting barrel is equipped with the hexagonal slot that cooperates with hexagonal insulating shaft, both ends of connecting barrel are equipped with notches, a plurality of through holes are formed in movable contact body and elbow arm, the inside of through hole is equipped with pin shaft, both ends of movable contact body are installed with equalizing cover, the side of equalizing cover close to movable contact body is integrally formed with positioning column, the movable contact body is equipped with the positioning hole that cooperates with positioning column, equalizing cover and movable contact body are equipped with fixed hole, and the movable contact body is arc structure.

[0006] As a preferred scheme of the utility model, the cross section of the elbow arm is arc-shaped.

[0007] As a preferred scheme of the utility model, the inner wall of the fixed hole is provided with a thread.

[0008] As a preferred scheme of the utility model, the number of pin shafts is three, and they are equidistantly distributed on the elbow arm.

[0009] As a preferred scheme of the utility model, the two adjacent connecting barrels abut against each other.

[0010] As a preferred scheme of the utility model, a screw is threadedly connected on the hexagonal insulation shaft, and the screw is located in the interior of the notch.

[0011] Compared with the prior art, the utility model has the beneficial effects that: the movable contact body is of an arc structure, the arc structure makes the stress dispersion of the movable contact body more uniform, avoids local stress concentration, and is not prone to local fatigue, thereby prolonging the service life of the movable contact body, and improving the electric field, making the electric field distribution more uniform, improving the pressure insulation level of the breaking point, the sharp end on the movable contact body is shielded by the voltage-sharing cover, the electric field is prevented from concentrating at the sharp end, the voltage-sharing effect is achieved on the electric field, the insulation level of the switch is improved, the movable contact body and the crank arm are positioned, installed and fixed through the three pin shafts, the movable contact body and the crank arm are fixed firmly, and the dimensional accuracy and the accuracy of the knife setting of the movable contact and the static contact are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0013] Figure 2 It is a rear view of the utility model;

[0014] Figure 3 It is a three-dimensional structure schematic view of the utility model Figure 2 It is a sectional view along the direction A-A of the utility model;

[0015] Figure 4 It is a structure schematic view of the movable contact mechanism of the utility model;

[0016] Figure 5 It is an explosion view of the movable contact mechanism of the utility model.

[0017] In the drawing: 1, rack; 2, hexagonal insulation shaft; 3, upper static contact; 4, lower static contact; 5, grounding contact; 6, movable contact mechanism; 61, crank arm; 62, movable contact body; 63, pin shaft; 64, connecting barrel; 65, hexagonal groove; 66, notch; 67, through hole; 68, positioning column; 69, voltage-sharing cover; 610, fixing hole; 611, positioning hole; 7, screw; 8, mounting plate; 9, solid-sealed pole. DETAILED DESCRIPTION

[0018] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0019] Please refer to Figures 1 to 5The utility model provides a technical scheme: a circuit breaker switch with double breaking points, which comprises a rack 1, a hexagonal insulating shaft 2 rotatably installed on the rack 1, an upper static contact 3 arranged at the top of the inner wall of the rack 1, a mounting plate 8 arranged at the rear side of the rack 1, a grounding contact 5 mounted on the mounting plate 8, a fixed sealing pole 9 arranged at the bottom of the rack 1, a lower static contact 4 mounted at the top of the fixed sealing pole 9, a plurality of movable contact mechanisms 6 arranged on the outer side of the hexagonal insulating shaft 2 and rotatable with the hexagonal insulating shaft 2, wherein the movable contact mechanism 6 comprises a connecting cylinder 64 sleeved on the hexagonal insulating shaft 2, a crank arm 61 arranged on the outer side of the connecting cylinder 64, and a movable contact body 62 symmetrically arranged in the crank arm 61, when in the open position, the two ends of the movable contact body 62 are in a suspended state, a first isolation breaking point is formed between the upper end of the movable contact body 62 and the upper static contact 3, a second isolation breaking point is formed between the upper end of the movable contact body 62 and the lower static contact 4, a first grounding breaking point is formed between the lower end of the movable contact body 62 and the grounding contact 5, and a second grounding breaking point is formed between the lower end of the movable contact body 62 and the lower static contact 4, thereby generating two isolation breaking points and two grounding breaking points, and the total breaking point distance is the cumulative value of the two breaking points, so that the distance between the breaking points is greatly increased under the condition that the opening and closing angle remains unchanged, thereby improving the safety and reliability, a hexagonal groove 65 matched with the hexagonal insulating shaft 2 is arranged in the middle of the connecting cylinder 64, the hexagonal insulating shaft 2 drives the connecting cylinder 64 to rotate through the hexagonal groove 65, the connecting cylinder 64 drives the crank arm 61 to rotate, the crank arm 61 drives the movable contact body 62 to rotate, notches 66 are arranged at the two ends of the connecting cylinder 64, the notches 66 are used for fixing the connecting cylinder 64 by screws 7, a plurality of through holes 67 are arranged on the movable contact body 62 and the crank arm 61, a pin shaft 63 is arranged in the through hole 67, the pin shaft 63 is used for penetrating through the through hole 67 to fix the movable contact body 62 and the crank arm 61, voltage equalizing covers 69 are arranged at the two ends of the movable contact body 62, the voltage equalizing covers 69 are used for shielding the gaps on the movable contact body 62, preventing the electric field from concentrating at the gaps, and playing a role in voltage equalization, thereby improving the insulation level of the switch, a positioning column 68 is integrally formed on one side of the voltage equalizing cover 69 close to the movable contact body 62, a positioning hole 611 matched with the positioning column 68 is arranged on the movable contact body 62, the positioning column 68 and the positioning hole 611 play a limiting role on the voltage equalizing cover 69, so that the voltage equalizing cover 69 is more firmly installed, fixing holes 610 are arranged on the voltage equalizing cover 69 and the movable contact body 62, the movable contact body 62 is in an arc structure, the arc structure makes the stress of the movable contact body 62 more evenly distributed, avoids local stress concentration, and is not prone to local fatigue, thereby prolonging the service life of the movable contact body 62.

[0020] The cross section of the crank arm 61 is in an arc shape, and the arc shape makes the crank arm 61 better adapt to the movable contact body 62.

[0021] The inner wall of the fixing hole 610 is provided with a thread, which enables a bolt to be screwed into the fixing hole 610, so that the equalizing cover 69 is fixed on the movable contact body 62 by using the bolt.

[0022] The three pin shafts 63 are equidistantly distributed on the crank arm 61, and the movable contact body 62 is fixedly installed on the crank arm 61 through the three pin shafts 63, so that the movable contact body 62 is fixedly connected with the crank arm 61, thereby ensuring the dimensional accuracy and the accuracy of the movable contact body 62 to the knife.

[0023] The adjacent two connecting barrels 64 abut against each other, so that the connecting barrel 64 cannot move along the hexagonal insulating shaft 2.

[0024] The hexagonal insulating shaft 2 is threadedly connected with a screw 7, which is used for fixing the connecting barrel 64, so that the connecting barrel 64 cannot deviate from the hexagonal insulating shaft 2, and the screw 7 is located in the inside of the notch 66.

[0025] Specifically, in use, the hexagonal insulating shaft 2 drives the connecting barrel 64 to rotate, the connecting barrel 64 drives the crank arm 61 to rotate, and then the movable contact body 62 rotates, when both ends of the movable contact body 62 are not in contact with the upper static contact 3, the grounding contact 5 and the lower static contact 4, at this time, the movable contact body 62 is in the open position, both ends of the movable contact body 62 are in a suspended state, a first isolation breaking point is formed between the upper end of the movable contact body 62 and the upper static contact 3, a second isolation breaking point is formed between the upper end of the movable contact body 62 and the lower static contact 4, and a first grounding breaking point is formed between the lower end of the movable contact body 62 and the grounding contact 5, so that two isolation breaking points and two grounding breaking points are formed, so as to improve safety, and in the use process of the movable contact body 62, the arc-shaped structure makes the stress of the movable contact body 62 more evenly distributed, thereby prolonging the service life of the movable contact body 62.

[0026] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like is the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0027] In addition, the terms "first", "second", "third", "fourth" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implying a number of the indicated technical features, so the features with "first", "second", "third", "fourth" can be explicitly or implicitly include at least one of the features.

[0028] In the present application, unless otherwise expressly specified and limited, the terms "mounting", "setting", "connecting", "fixing", "screw connection" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements, unless otherwise expressly limited, those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0029] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A circuit breaker switch with double breaks, comprising a frame (1) and a hexagonal insulated shaft (2) rotatably mounted on the frame (1), wherein an upper stationary contact (3) is provided at the top of the inner wall of the frame (1), a mounting plate (8) is provided on the rear side of the frame (1), a grounding contact (5) is mounted on the mounting plate (8), a solid-sealed pole (9) is provided at the bottom of the frame (1), and a lower stationary contact (4) is mounted at the top of the solid-sealed pole (9), characterized in that: The outer side of the hexagonal insulating shaft (2) is provided with a plurality of movable contact mechanisms (6) that can rotate together with the hexagonal insulating shaft (2) along its length. The movable contact mechanism (6) includes a connecting cylinder (64) sleeved on the hexagonal insulating shaft (2). The outer side of the connecting cylinder (64) is provided with a crank arm (61). The movable contact body (62) is symmetrically installed inside the crank arm (61). The middle part of the connecting cylinder (64) is provided with a hexagonal groove (65) that cooperates with the hexagonal insulating shaft (2). Both ends of the connecting cylinder (64) are provided with notches (66). The movable contact body ( 62) and the crank arm (61) are provided with multiple through holes (67), and a pin (63) is inserted inside the through hole (67). Both ends of the moving contact body (62) are equipped with equalizing covers (69). The equalizing cover (69) has a positioning post (68) integrally formed on the side of the moving contact body (62) near the moving contact body (62). The moving contact body (62) is provided with a positioning hole (611) that cooperates with the positioning post (68). Both the equalizing cover (69) and the moving contact body (62) are provided with fixing holes (610). The moving contact body (62) has an arc-shaped structure.

2. A circuit breaker switch with double breaks according to claim 1, characterized in that: The cross-section of the crank arm (61) is arc-shaped.

3. A circuit breaker switch with double breaks according to claim 1, characterized in that: The inner wall of the fixing hole (610) is threaded.

4. A circuit breaker switch with double breaks according to claim 1, characterized in that: The number of pins (63) is three, and they are evenly distributed on the crank arm (61).

5. A circuit breaker switch with double breaks according to claim 1, characterized in that: The two adjacent connecting cylinders (64) are pressed together.

6. A circuit breaker switch with double breaks according to claim 1, characterized in that: A screw (7) is threaded onto the hexagonal insulating shaft (2), and the screw (7) is located inside the notch (66).

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