Three-phase imbalance commutation device

Abstract

The utility model discloses a three-phase imbalance commutation device, relates to the circuit commutation technology field, and comprises a housing and a cover plate, the cover plate is fixedly installed on the top of the housing, the housing is internally provided with an electrical element, the electrical element comprises a key rod, a key spring, an interlocking slide block, a copper coil and an iron core, the key rod is inserted in the cover plate, the key spring is inserted in the iron core, and the interlocking slide block is inserted in the iron core. According to the utility model, the electrical element is arranged in the shell, the main structure of the electrical element is the interlocking slide block, the interlocking slide block can fix the key rod in a normal state, the copper coil is arranged in the shell, when the running current exceeds a set value, the copper coil generates an electromagnetic force, and the key rod is driven to rotate by the interlocking slide block. Under the action of electromagnetic force, the iron core pushes the interlocking sliding block to move towards the left side, so that the key rod is separated from the interlocking sliding block, and finally the switch is switched off. And the reliability and the safety of the operation of the three-phase imbalance commutation device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit commutation, in particular to a three-phase unbalanced commutation device. Background Art

[0002] The three-phase unbalanced commutation device is a device used to deal with the imbalance problem in the three-phase circuit. The three-phase unbalanced commutation device can monitor the three-phase voltage or current, and then achieve the balance of the three phases through the corresponding control method to ensure that each phase operates within the appropriate range.

[0003] For example, publication number CN219248359U discloses a switching power supply with an overcurrent protection function, including a bottom shell, a movable shell and a fixed shell. The movable shell and the fixed shell together constitute a complete shell. A stretching column is movably connected between the movable shell and the fixed shell. The movable shell is adapted to the fixed shell and the bottom shell, and an end is installed on one side of the bottom shell.

[0004] However, in the prior art, conventional three-phase unbalanced commutation devices have no protection function and are likely to be overloaded. If the commutation device is in an overloaded state for a long time, the copper conductors and contacts inside it will become seriously heated. The high temperature will reduce the current carrying capacity of the copper conductor, and the current carrying capacity will increase the heating, resulting in a fire hazard in the entire device, which seriously affects the safety of electricity use. Utility Model Content

[0005] The utility model aims to solve the problem in the prior art that when the phase-changing device is in a state of long-term overload operation, the copper conductors and contacts inside the phase-changing device will generate serious heat, resulting in a fire hazard in the entire device, and proposes a three-phase unbalanced phase-changing device.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a three-phase unbalanced phase-changing device, comprising a shell and a cover plate, the cover plate is fixedly installed on the top of the shell, the interior of the shell is provided with electrical components, the electrical components include a key rod, a key spring, an interlocking slider, a copper coil and an iron core, the key rod is inserted into the interior of the cover plate, the key spring is sleeved on the outer wall of the key rod, one end of the key rod is fixedly installed with a blocking block, one end of the key spring is fixedly connected to the outer wall of the cover plate, the other end of the key spring is fixedly connected to the blocking block, the iron core is fixedly installed on one end of the interlocking slider, the copper coil is fixedly installed on the inner wall of the shell, the iron core is inserted into the interior of the copper coil, and contacts are fixedly installed on the inner wall of the shell.

[0007] Preferably, a spring is fixedly mounted on the other end of the interlocking slider, and the other end of the spring is fixedly connected to the inner wall of the shell.

[0008] Preferably, a limiting convex strip is fixedly mounted on the bottom of the shell, and the interlocking slider is slidably connected inside the limiting convex strip.

[0009] Preferably, the contact is fixedly mounted on one side of the limiting convex strip, and the contact is located directly below the key rod.

[0010] Preferably, a protrusion is fixedly mounted on one side of the key rod, and a locking groove is provided inside the interlocking slider.

[0011] Preferably, an inclined groove is provided on the top of the interlocking slider, and the inclined groove is located above the locking groove.

[0012] Preferably, a guide rod is fixedly mounted at the junction of the interlocking slider and the spring.

[0013] Compared with the prior art, the advantages and positive effects of the utility model are:

[0014] 1. In the utility model, an electrical component is arranged inside the housing, and the main structure of the electrical component is an interlocking slider. Under normal conditions, the interlocking slider can fix the key rod, and a copper coil is arranged inside the housing. When the operating current exceeds the set value, the copper coil generates electromagnetic force, and the iron core pushes the interlocking slider to move to the left under the action of the electromagnetic force, so that the key rod is disengaged from the interlocking slider, and finally the switch is disconnected. The reliability and safety of the operation of the three-phase unbalanced phase-changing device are improved.

[0015] 2. In the utility model, a limiting convex strip is provided at the bottom of the shell to determine the moving route of the interlocking slider, thereby improving the stability of the interlocking slider during movement. At the same time, a key spring is provided on the key rod and a spring is provided at the end of the interlocking slider to reset the key rod and the interlocking slider. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model provides a schematic diagram of the internal structure of a three-phase unbalanced commutation device;

[0017] Figure 2 A schematic diagram of the planar structure of a three-phase unbalanced commutation device is proposed for the utility model;

[0018] Figure 3 The utility model provides a schematic diagram of the planar structure of an interlocking slider of a three-phase unbalanced commutation device;

[0019] Figure 4 The utility model provides a schematic diagram of a key rod structure of a three-phase unbalanced phase-changing device.

[0020] Legend: 1. Shell; 2. Electrical component; 3. Contact; 4. Limiting convex strip; 5. Cover plate; 21. Key rod; 22. Key spring; 23. Spring; 24. Interlocking slider; 25. Copper coil; 26. Iron core; 27. Stop block; 28. Guide rod; 29. ​​Inclined groove; 210. Lock groove; 211. Protrusion. DETAILED DESCRIPTION

[0021] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0023] Embodiment 1: Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the utility model provides a three-phase unbalanced commutation device, including a shell 1 and a cover plate 5, the cover plate 5 is fixedly mounted on the top of the shell 1, an electrical component 2 is arranged inside the shell 1, the electrical component 2 includes a key rod 21, a key spring 22, an interlocking slider 24, a copper coil 25 and an iron core 26, the key rod 21 is inserted into the inside of the cover plate 5, the key spring 22 is sleeved on the outer wall of the key rod 21, a blocking block 27 is fixedly mounted on one end of the key rod 21, one end of the key spring 22 is fixedly connected to the outer wall of the cover plate 5, the other end of the key spring 22 is fixedly connected to the blocking block 27, the iron core 26 is fixedly mounted on one end of the interlocking slider 24, the copper coil 25 is fixedly mounted on the inner wall of the shell 1, the iron core 26 is inserted into the inside of the copper coil 25, a contact 3 is fixedly mounted on the inner wall of the shell 1, a protrusion 211 is fixedly mounted on one side of the key rod 21, and a locking groove 210 is opened inside the interlocking slider 24.

[0024] The specific configuration and function of this embodiment are described in detail below. The electrical component 2 is installed in the housing 1. A cover plate 5 is connected to the top of the housing 1 to ensure that the internal space is in a closed state. The key rod 21 penetrates the cover plate 5 and is inserted into the housing 1. The protrusion 211 on the side is stuck in the lock groove 210 to maintain its own stability. In this state, the end of the key rod 21 contacts the contact 3, so that the circuit is in a connected state, and the key spring 22 located on the outer wall of the key rod 21 will be compressed.

[0025] An iron core 26 is installed at one end of the interlocking slider 24, and the iron core 26 is inserted into the copper coil 25 on the inner wall of the housing 1. When the operating current exceeds the set value, the copper coil 25 will be energized and generate electromagnetic force. At this time, the iron core 26 is pushed to the left by the electromagnetic force generated by the copper coil 25, and the interlocking slider 24 is simultaneously driven to move to the left side of the housing 1, so that the key rod 21 is disengaged from the interlocking slider 24, and the key rod 21 is separated from the contact 3 to disconnect the switch;

[0026] As the interlocking slider 24 moves toward the left side of the shell 1, the protrusion 211 on the side of the key rod 21 will move out of the lock groove 210, and the key rod 21 will be popped up a certain distance under the rebound of the key spring 22, so that the key rod 21 is disengaged from the interlocking slider 24. The position of the key spring 22 is determined by the blocking block 27.

[0027] Embodiment 2: Figure 1 and Figure 2 and Figure 3 As shown, a limiting ridge 4 is fixedly installed on the bottom of the shell 1, and the interlocking slider 24 is slidably connected to the inside of the limiting ridge 4. The contact 3 is fixedly installed on one side of the limiting ridge 4, and the contact 3 is located directly below the key rod 21. An inclined groove 29 is provided on the top of the interlocking slider 24, and the inclined groove 29 is located above the locking groove 210. A guide rod 28 is fixedly installed at the junction of the interlocking slider 24 and the spring 23.

[0028] The effect achieved by the entire embodiment is that the limiting convex strip 4 at the bottom of the housing 1 is used to determine the position of the interlocking slider 24 to prevent the interlocking slider 24 from being misplaced or tilted. The interlocking slider 24 is located on the side of the key rod 21. After the key rod 21 is ejected, the key rod 21 can be reconnected to the contact 3 by pressing down the blocking block 27.

[0029] After the key rod 21 is ejected, the circuit is disconnected and the current is lost. At this time, the copper coil 25 no longer generates thrust on the iron core 26, and the spring 23 pushes the interlocking slider 24 to the right side of the shell 1, so that the iron core 26 is reinserted into the copper coil 25. At this time, the blocking block 27 is pressed down to make the key rod 21 contact with the inclined groove 29, and thereby push the interlocking slider 24 to move to the left again, so that the protrusion 211 on the side of the key rod 21 can re-enter the lock groove 210, and the spring 23 rebounds to confine the protrusion 211 in the lock groove 210, and the circuit is reconnected.

[0030] The method of use and working principle of the device: the key rod 21 penetrates the cover plate 5 and is inserted into the housing 1, and the protrusion 211 on the side thereof is stuck in the lock groove 210. At this time, the spring 23 on the left side is in an extended state and can support the interlocking slider 24. The end of the key rod 21 contacts the contact 3, so that the circuit is in a connected state, and the key spring 22 located on the outer wall of the key rod 21 is in a compressed state;

[0031] When the operating current exceeds the set value, the copper coil 25 will be energized and generate electromagnetic force. At this time, the iron core 26 pushes the interlocking slider 24 to the left under the action of the electromagnetic force generated by the copper coil 25, so that the key rod 21 is disengaged from the interlocking slider 24. The rebound of the key spring 22 will bring the key rod 21 to the top of the interlocking slider 24, and finally disconnect the switch;

[0032] When the circuit is disconnected, the current is lost, and the copper coil 25 no longer generates thrust on the iron core 26. The spring 23 pushes the interlocking slider 24 to the right side of the shell 1, so that the iron core 26 is reinserted into the copper coil 25. When the circuit needs to be reconnected, the blocking block 27 is pressed down, and the contact between the key rod 21 and the inclined groove 29 is utilized to push the interlocking slider 24 to move to the left again, so that the protrusion 211 on the side of the key rod 21 re-enters the locking groove 210. The spring 23 rebounds again to confine the protrusion 211 in the locking groove 210, and the circuit is reconnected.

[0033] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A three-phase unbalanced commutation device, comprising a housing (1) and a cover plate (5), wherein the cover plate (5) is fixedly mounted on the top of the housing (1), and an electrical component (2) is arranged inside the housing (1), characterized in that: The electrical component (2) comprises a key rod (21), a key spring (22), an interlocking slider (24), a copper coil (25) and an iron core (26); the key rod (21) is inserted into the interior of the cover plate (5); the key spring (22) is sleeved on the outer wall of the key rod (21); a blocking block (27) is fixedly mounted on one end of the key rod (21); one end of the key spring (22) is fixedly connected to the outer wall of the cover plate (5); the other end of the key spring (22) is fixedly connected to the blocking block (27); the iron core (26) is fixedly mounted on one end of the interlocking slider (24); the copper coil (25) is fixedly mounted on the inner wall of the housing (1); the iron core (26) is inserted into the interior of the copper coil (25); and a contact (3) is fixedly mounted on the inner wall of the housing (1).

2. A three-phase unbalanced commutation device according to claim 1, characterized in that: A spring (23) is fixedly mounted on the other end of the interlocking slider (24), and the other end of the spring (23) is fixedly connected to the inner wall of the housing (1).

3. A three-phase unbalanced commutation device according to claim 1, characterized in that: A limiting convex strip (4) is fixedly mounted on the bottom of the housing (1), and the interlocking slider (24) is slidably connected inside the limiting convex strip (4).

4. A three-phase unbalanced commutation device according to claim 1, characterized in that: The contact point (3) is fixedly mounted on one side of the limiting convex strip (4), and the contact point (3) is located directly below the key rod (21).

5. A three-phase unbalanced commutation device according to claim 1, characterized in that: A protrusion (211) is fixedly mounted on one side of the key rod (21), and a locking groove (210) is provided inside the interlocking slider (24).

6. A three-phase unbalanced commutation device according to claim 1, characterized in that: An inclined groove (29) is provided on the top of the interlocking slide block (24), and the inclined groove (29) is located above the locking groove (210).

7. A three-phase unbalanced commutation device according to claim 1, characterized in that: A guide rod (28) is fixedly mounted at the junction of the interlocking slider (24) and the spring (23).

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