Single-phase rapid permanent magnetic mechanism for pole-mounted circuit breaker

Abstract

The utility model relates to a single-phase fast permanent magnetic mechanism for a pole-mounted circuit breaker, which comprises a static end plate and a moving end plate, a plurality of connecting poles are arranged between the static end plate and the moving end plate, a circle of magnet yoke is arranged on one surface of the static end plate facing the moving end plate, a static iron core is arranged in the magnet yoke, the static iron core is fixedly connected with the static end plate, and a circle of annular groove is arranged between the static iron core and the magnet yoke. A coil is fixedly installed on the side, facing the movable end plate, of the static iron core, a movable iron core is installed on the inner side of the movable end plate, a circle of annular sliding groove is formed in the side, corresponding to the coil, of the movable iron core, the movable iron core is connected with the coil in a sliding mode, and a pole pull rod is installed in the center of the static end plate. One end of the pole pull rod penetrates out of the static end plate and is in sliding connection with the static end plate, the other end of the pole pull rod penetrates out of the static iron core and penetrates out of the center of the movable iron core, the pole pull rod is fixedly connected with the movable iron core, and the middle of the pole pull rod is sleeved with an opening spring; according to the utility model, the miniaturization design of the pole-mounted circuit breaker can be realized, the product volume and weight are reduced, and the transportation and installation are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a single-phase fast permanent magnet mechanism for a pole-mounted circuit breaker. Background Art

[0002] At present, pole-mounted permanent magnet circuit breakers are widely used in power grid systems, and the permanent magnet mechanism, as the driving core of the pole-mounted permanent magnet circuit breaker, is particularly important. It is well known that the traditional permanent magnet mechanism and the spring operating mechanism have the same structure in driving the closing and opening actions of the pole-mounted circuit breaker. Both convert the horizontal driving force into the longitudinal closing and opening driving force through the connecting plate. A considerable part of the force will be lost during the transmission process, which requires the permanent magnet mechanism itself to have greater driving force and strength, and greater driving power consumption, which is not conducive to the miniaturization of the product, thereby increasing the weight and volume of the product, increasing material costs and transportation costs, as well as operating costs, and compared with the direct-acting driving opening and closing method, it is definitely inferior in time and efficiency, and the pole-mounted permanent magnet circuit breakers are all installed on the poles, which also brings certain difficulties to installation and use. Summary of the Invention

[0003] The main purpose of the utility model is to solve the problems existing in the above-mentioned prior art and to provide a single-phase fast permanent magnet mechanism for a pole-mounted circuit breaker.

[0004] The specific scheme of the utility model is: a single-phase fast permanent magnet mechanism for a pole-mounted circuit breaker, comprising a static end plate and a moving end plate, with several connecting columns installed between the end plate and the moving end plate, a circle of magnetic yoke is installed on the side of the static end plate facing the moving end plate, a static iron core is provided in the magnetic yoke, the static iron core is fixedly connected to the static end plate, a circle of annular groove is provided between the static iron core and the magnetic yoke, a permanent magnet is installed in the annular groove, a coil is fixedly installed on the side of the static iron core facing the moving end plate, a moving iron core is provided on the inner side of the moving end plate, a circle of annular sliding groove is provided on the side of the moving iron core corresponding to the coil, the moving iron core is slidably connected to the coil, a pole pull rod is installed in the center of the static end plate, one end of the pole pull rod passes through the static end plate and is slidably connected to the static end plate, the other end passes through the static iron core and passes through the center of the moving iron core, the pole pull rod is fixedly connected to the moving iron core, and the part of the pole pull rod located between the static end plate and the moving iron core is covered with a trip spring.

[0005] Furthermore, a circle of mounting grooves is provided on one end of the static iron core facing the movable iron core, and the coil is mounted in the mounting grooves.

[0006] Furthermore, the coil completely covers the annular groove.

[0007] Furthermore, a stud is provided at one end of the pole pull rod facing the moving iron core, the stud passes through the center of the moving iron core and a nut is installed at the outer end.

[0008] Furthermore, the inner wall of the slide groove of the moving iron core is provided with a wear-resistant coating.

[0009] Compared with the existing technology, the utility model has the following advantages: 1. The mechanism is small in size and light in weight, which can realize the miniaturization design of the pole-mounted circuit breaker, reduce the product volume and weight, and facilitate transportation and installation;

[0010] 2. The driving direction of the mechanism is exactly the same as the movement direction of the pole pull rod, which simplifies the transmission structure, improves the transmission efficiency and reduces power consumption;

[0011] 3. The pole pull rod is directly fixed on the moving iron core, which facilitates the data measurement and debugging of the circuit breaker and improves production efficiency;

[0012] 4. Simple structure, fewer transmission parts, reduced production costs, simple assembly, time-saving, and improved production efficiency;

[0013] 5. After modifying the installation method of the mechanism, it can be applied to existing pole-mounted circuit breakers, and has good market applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the utility model in the open state;

[0015] Figure 2 This is a schematic diagram of the utility model in the closed state;

[0016] In the figure: 1. Magnetic yoke; 2. Static iron core; 3. Permanent magnet; 4. Coil; 5. Moving iron core; 6. Static end plate; 7. Moving end plate; 8. Trip spring; 9. Pull rod; 10. Housing. DETAILED DESCRIPTION

[0017] See also Figure 1-2 This embodiment is a single-phase fast permanent magnet mechanism for a pole-mounted circuit breaker, comprising a static end plate 6 and a dynamic end plate 7, with a plurality of connecting columns installed between the end plate and the dynamic end plate 7. A yoke 1 is installed on the side of the static end plate 6 facing the dynamic end plate 7, and a static iron core 2 is provided in the yoke 1. The static iron core 2 is fixedly connected to the static end plate 6. A ring groove is provided between the static iron core 2 and the yoke 1, and a permanent magnet 3 is installed in the ring groove. A coil 4 is fixedly installed on the side of the static iron core 2 facing the dynamic end plate 7. A moving iron core 5 is provided on the inner side of 7. The moving iron core 5 is provided with a circle of annular groove on one side corresponding to the coil 4. The moving iron core 5 is slidably connected to the coil 4. A pole pull rod 9 is provided at the center of the static end plate 6. One end of the pole pull rod 9 passes through the static end plate 6 and is slidably connected to the static end plate 6, and the other end passes through the static iron core 2 and passes through the center of the moving iron core 5. The pole pull rod 9 is fixedly connected to the moving iron core 5, and the part of the pole pull rod 9 located between the static end plate 6 and the moving iron core 5 is covered with a trip spring 8.

[0018] Furthermore, a circle of mounting grooves is provided on one end of the static iron core 2 facing the movable iron core 5 , and the coil 4 is mounted in the mounting grooves.

[0019] Furthermore, the coil 4 completely covers the annular groove, thereby sealing the permanent magnet 3 in the annular groove.

[0020] Furthermore, a stud is provided at one end of the pole pull rod 9 facing the moving iron core 5 , the stud passes through the center of the moving iron core 5 and a nut is installed at the outer end.

[0021] Furthermore, the inner wall of the sliding groove of the moving iron core 5 is provided with a wear-resistant coating. Figure 1 When the mechanism is in the opening state, the movable end plate 7 is away from the coil 4 and close to the movable end plate 7, and the pole pull rod 9 is in the retracted state; when the closing operation is required, the closing current is supplied to the coil 4, and the coil 4 is energized to generate an induced magnetic field in the same direction as the permanent magnet 3. Under the dual action of the permanent magnet and the induced magnetic field, the movable iron core 5 drives the pull rod 9 to move upward, overcoming the elastic force of the opening spring 8 and the external circuit breaker contact spring, until the movable iron core 5 contacts the magnetic yoke 1 and the static iron core 2. At this time, it is in the closing state, as shown in FIG. Figure 2 As shown; Similarly, when the organization is in Figure 2 In the closed state shown, an operating current is applied to coil 4 to open the circuit breaker. This energizes coil 4, generating an induced magnetic field in the opposite direction of permanent magnet 3. The movable iron core 5, under the dual action of the opening spring 8 and the circuit breaker's contact spring, drives the pull rod 9 downward until it contacts the movable end plate 7. The entire mechanism moves vertically and downward, resulting in a simple structure.

[0022] The static end plate 6 is provided with mounting holes for the poles, and the mechanism is directly attached to the inner surface of the housing 10 during installation. A large gap is created between the three ends of the circuit breaker in the horizontal direction. On this basis, a product with a smaller height and width can be designed, which is conducive to the miniaturization of the circuit breaker, reducing the volume and weight of the product and improving economic benefits.

Claims

1. A single-phase fast permanent magnet mechanism for a pole-mounted circuit breaker, characterized in that: It includes a static end plate and a dynamic end plate, and several connecting columns are installed between the end plate and the dynamic end plate. A circle of magnetic yoke is installed on the side of the static end plate facing the dynamic end plate, and a static iron core is arranged in the magnetic yoke. The static iron core is fixedly connected to the static end plate. A circle of annular groove is arranged between the static iron core and the magnetic yoke, and a permanent magnet is arranged in the annular groove. A coil is fixedly installed on the side of the static iron core facing the dynamic end plate, and a dynamic iron core is arranged on the inner side of the dynamic end plate. A circle of annular groove is arranged on the side of the dynamic iron core corresponding to the coil, and the dynamic iron core is slidably connected to the coil. A pole pull rod is installed in the center of the static end plate, one end of the pole pull rod passes through the static end plate and is slidably connected to the static end plate, and the other end passes through the static iron core and passes through the center of the dynamic iron core. The pole pull rod is fixedly connected to the dynamic iron core, and a part of the pole pull rod located between the static end plate and the dynamic iron core is covered with a disconnecting spring.

2. The single-phase fast permanent magnet mechanism for a pole-mounted circuit breaker according to claim 1 is characterized in that: One end of the static iron core facing the moving iron core is provided with a circle of mounting grooves, and the coil is mounted in the mounting grooves.

3. The single-phase fast permanent magnet mechanism for a pole-mounted circuit breaker according to claim 2 is characterized in that: The coil completely covers the annular groove.

4. The single-phase fast permanent magnet mechanism for a pole-mounted circuit breaker according to claim 1 is characterized in that: A stud is provided at one end of the pole pull rod facing the moving iron core. The stud passes through the center of the moving iron core and a nut is installed at the outer end.

5. The single-phase fast permanent magnet mechanism for a pole-mounted circuit breaker according to claim 1, characterized in that: The inner wall of the slide groove of the moving iron core is provided with a wear-resistant coating.

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