Molded case circuit breaker electromagnetic system

Abstract

The utility model discloses a molded case circuit breaker electromagnetic system, which comprises a shell, the bottom of the shell is detachably connected with a bottom shell, the top of the bottom shell is fixedly provided with a static iron core, the outer side of the static iron core is concentrically provided with an electrified coil, the two sides of the top of the bottom shell are symmetrically and fixedly connected with fixed blocks, and the interiors of the two fixed blocks are both slidably connected with push rods. One end of each push rod is fixedly connected with a mounting plate, and the other end of each push rod is fixedly connected with a push ring. Through mutual cooperation of structures such as the push ring, the pressing ring, the push rod, the elastic piece and the mounting plate, when the outer shell and the bottom shell are connected, the push ring is extruded by the pressing ring to enable the mounting plate to press and fix the electrified coil, and when the outer shell and the bottom shell are separated, the push ring is pushed by the elastic piece to enable the electrified coil to be fixed. According to the electrified coil replacement device, the electrified coil is not pressed and fixed by the mounting plate, so that the electrified coil can be rapidly replaced in the electrified coil replacement process, and the electrified coil cannot deviate or deform.

Description

Technical Field

[0001] The utility model relates to the technical field of computers, in particular to an electromagnetic system of a molded case circuit breaker. Background Art

[0002] A circuit breaker is a switch device that can close, carry and disconnect current under normal circuit conditions and close, carry and disconnect current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. The boundary between high and low voltage is relatively vague. Generally, circuit breakers above 3kV are called high-voltage electrical appliances.

[0003] A Chinese patent with publication number (CN212570905U) discloses an electromagnetic system of a plastic case circuit breaker, comprising a plastic case, a first protective case and a second protective case, wherein a movable groove is provided on one side of the plastic case, rotating rods are threadedly connected to both sides of the outer side of the plastic case, and a fixing plate is fixedly connected to one side of the two rotating rods, a second protective case is arranged between the two fixing plates, an opening is arranged on the upper surface of the second protective case, a stationary iron core is fixedly connected to the bottom end of the inner side of the second protective case, an energized coil is arranged outside the stationary iron core, and a buffer block is fixedly connected to the upper end of the stationary iron core, and the rotating rod can be moved by rotating the rotating rod, and the fixing plate can be moved by rotating the rotating rod, and the fixing plate can be fixed and released by moving the fixing plate, and when the energized coil needs to be taken out, the fixing plate can be loosened to take out the energized coil, and vice versa, the energized coil can be fixed.

[0004] The defect of the above-selected technology is that the second protective shell is clamped by the fixing plate by twisting the rotating rods threadedly installed on both sides of the plastic shell, and the energized coil is fixed by the second protective shell. The two rotating rods are independently set, and deviation will occur when twisting, resulting in the second protective shell on one side moving too much and the second protective shell on the other side moving too little, thereby causing position deviation of the energized coil. Utility Model Content

[0005] The purpose of the utility model is to provide an electromagnetic system for a molded case circuit breaker to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electromagnetic system of a molded case circuit breaker, comprising a shell, the bottom of which is detachably connected to a bottom shell, a stationary iron core is fixed to the top of the bottom shell, an energized coil is concentrically arranged on the outer side of the stationary iron core, fixed blocks are symmetrically fixedly connected to the top of the bottom shell on both sides, push rods are slidably connected to the insides of the two fixed blocks, one end of the two push rods is fixedly connected to a mounting plate, the other end of the two push rods is fixedly connected to a push ring, an elastic member is sleeved on the outer side of the push rod, and a pressure ring used in conjunction with the push ring is fixedly connected to the end of the inner wall of the shell close to the bottom shell.

[0007] As a preferred solution of the utility model, a protective shell is fixedly connected to the top center of the shell, a top plate is installed inside the protective shell, a spring is fixedly connected to the bottom of the top plate, a pressure plate is fixedly connected to the bottom of the spring, a movable iron core is fixedly connected to the bottom of the pressure plate, connecting rods are fixedly connected to both sides of the movable iron core, the connecting rods pass through the outside of the shell and are fixedly connected to an adjusting ring, a sliding groove is opened on the outer wall of the shell, and the connecting rod slides inside the sliding groove.

[0008] As a preferred solution of the utility model, a positive electrode terminal is fixedly connected to the bottom of the bottom shell, a negative electrode terminal is fixedly connected to the bottom of the bottom shell and on one side of the positive electrode terminal, one end of the positive electrode terminal is fixedly connected to the positive electrode connecting wire, and one end of the negative electrode terminal is fixedly connected to the negative electrode connecting wire.

[0009] As a preferred solution of the utility model, edges of the surfaces where the pressure ring and the push ring are close to each other are chamfered.

[0010] As a preferred solution of the utility model, a current controller is connected to the surface of the positive electrode terminal.

[0011] Compared with the prior art, the utility model has the following beneficial effects: through the mutual cooperation between the push ring, pressure ring, push rod, elastic part and mounting plate and other structures, the utility model can squeeze the push ring through the pressure ring to fix the mounting plate tightly when the outer shell and the bottom shell are connected; and can also push the push ring through the elastic part to release the mounting plate from the tight fixation of the power-carrying coil when the outer shell and the bottom shell are separated. In the process of replacing the power-carrying coil, the power-carrying coil can be replaced quickly without causing the power-carrying coil to be offset or deformed. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the internal structure of the outer shell and the bottom shell of the utility model;

[0013] Figure 2 This is a schematic diagram of the push ring and mounting plate structure of the utility model;

[0014] Figure 3 It is a three-dimensional diagram of the utility model.

[0015] In the figure: 1. outer shell; 2. bottom shell; 3. protective shell; 4. push ring; 5. pressure ring; 6. fixed block; 7. push rod; 8. elastic member; 9. mounting plate; 10. stationary iron core; 11. energized coil; 12. top plate; 13. spring; 14. pressure plate; 15. adjustment ring; 16. connecting rod; 17. moving iron core; 18. slide slot; 19. positive terminal; 20. negative terminal; 21. positive connecting wire; 22. negative connecting wire; 23. current controller. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figures 1 to 3 The utility model provides a technical solution: an electromagnetic system of a molded case circuit breaker, comprising a shell 1, the bottom of the shell 1 is detachably connected to a bottom shell 2, which is a threaded connection here, a stationary iron core 10 is fixed on the top of the bottom shell 2, and an energized coil 11 is concentrically arranged on the outer side of the stationary iron core 10, and fixed blocks 6 are symmetrically fixedly connected to the left and right sides of the top of the bottom shell 2, and push rods 7 are slidably connected to the insides of the two fixed blocks 6, one end of the two push rods 7 is fixedly connected to a mounting plate 9, the push rods 7 are fixed to the middle bottom end of the mounting plate 9, and the other ends of the two push rods 7 are fixedly connected to a push ring 4, the push ring 4 is an arc structure, and an elastic member 8 is sleeved on the outer side of the push rod 7, and the elastic member 8 can be a rubber spring, and a pressure ring 5 used in conjunction with the push ring 4 is fixedly connected to the end of the inner wall of the shell 1 close to the bottom shell 2.

[0018] Among them, a protective shell 3 is fixedly connected to the top center of the shell 1, a top plate 12 is installed inside the protective shell 3, a spring 13 is fixedly connected to the bottom of the top plate 12, a pressure plate 14 is fixedly connected to the bottom of the spring 13, a moving iron core 17 is fixedly connected to the bottom of the pressure plate 14, connecting rods 16 are fixedly connected to both sides of the moving iron core 17, the connecting rods 16 penetrate to the outside of the shell 1 and are fixedly connected to an adjusting ring 15, a slide groove 18 is provided on the outer wall of the shell 1, the connecting rod 16 slides inside the slide groove 18, and a magnetic field is generated when current is passed through the energized coil 11, thereby attracting the moving iron core 17 at the upper end of the energized coil 11, and the moving iron core 17 moves downward, and during the movement of the moving iron core 17, the connecting rod 16 moves downward together with the adjusting ring 15 in the slide groove 18, and the circuit can be disconnected by changing the position of the adjusting ring 15, thereby playing a protective role.

[0019] Among them, the bottom of the bottom shell 2 is fixedly connected with a positive terminal 19, and the bottom of the bottom shell 2 and one side of the positive terminal 19 are fixedly connected with a negative terminal 20. One end of the positive terminal 19 is fixedly connected with a positive connection line 21, and one end of the negative terminal 20 is fixedly connected with a negative connection line 22. The surface of the positive terminal 19 is connected with a current controller 23. When the device encounters a large current, the current controller 23 passes the current from the positive connection line 21 through the positive terminal 19 into the inside of the energized coil 11, and flows out through the negative connection line 22 at the other end of the energized coil 11 to form a closed loop.

[0020] The edges of the surfaces where the pressure ring 5 and the push ring 4 are close to each other are chamfered.

[0021] Specifically, when the energized coil 11 needs to be replaced, it is only necessary to twist the bottom shell 2 to move the bottom shell 2 downward, and then the outer shell 1 and the bottom shell 2 are separated, and the pressure ring 5 is freed from the restriction on the push ring 4. Then, the two push rings 4 slide toward the outside of the bottom shell 2 under the push of the elastic member 8, and then the mounting plate 9 also slides toward the outside of the bottom shell 2. At this time, the energized coil 11 can be taken out for replacement.

[0022] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0024] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A molded case circuit breaker electromagnetic system, comprising a housing (1), characterized in that: The bottom of the shell (1) is detachably connected to the bottom shell (2), the top of the bottom shell (2) is fixed with a stationary iron core (10), the outer side of the stationary iron core (10) is concentrically provided with an energized coil (11), the top of the bottom shell (2) is symmetrically fixedly connected with fixed blocks (6) on both sides, the interiors of the two fixed blocks (6) are slidably connected with push rods (7), one end of the two push rods (7) is fixedly connected with a mounting plate (9), the other ends of the two push rods (7) are fixedly connected with a push ring (4), the outer side of the push rod (7) is sleeved with an elastic member (8), and the inner wall of the shell (1) is fixedly connected with a pressure ring (5) used in conjunction with the push ring (4) at one end close to the bottom shell (2).

2. The electromagnetic system of a molded case circuit breaker according to claim 1, characterized in that: A protective shell (3) is fixedly connected to the center of the top of the shell (1), a top plate (12) is installed inside the protective shell (3), a spring (13) is fixedly connected to the bottom of the top plate (12), a pressure plate (14) is fixedly connected to the bottom of the spring (13), a moving iron core (17) is fixedly connected to the bottom of the pressure plate (14), connecting rods (16) are fixedly connected to both sides of the moving iron core (17), the connecting rods (16) pass through the outer side of the shell (1) and are fixedly connected to an adjusting ring (15), a sliding groove (18) is provided on the outer wall of the shell (1), and the connecting rod (16) slides inside the sliding groove (18).

3. The electromagnetic system of a molded case circuit breaker according to claim 2, characterized in that: A positive electrode terminal (19) is fixedly connected to the bottom of the bottom shell (2), a negative electrode terminal (20) is fixedly connected to the bottom of the bottom shell (2) and located on one side of the positive electrode terminal (19), one end of the positive electrode terminal (19) is fixedly connected to a positive electrode connecting wire (21), and one end of the negative electrode terminal (20) is fixedly connected to a negative electrode connecting wire (22).

4. The electromagnetic system of a molded case circuit breaker according to claim 3, characterized in that: The edges of the pressing ring (5) and the pushing ring (4) that are close to each other are chamfered.

5. The electromagnetic system of a molded case circuit breaker according to claim 4, characterized in that: A current controller (23) is connected to the surface of the positive electrode terminal (19).

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