Quick disconnect structure for electrical line overload protection

Abstract

The utility model relates to electrical protection device technical field discloses a quick disconnecting structure for electrical circuit overload protection, including shell, compression spring no.

Description

Technical Field

[0001] This utility model relates to the field of electrical protection device technology, and in particular to a fast disconnection structure for overload protection of electrical circuits. Background Technology

[0002] In modern power systems and industrial applications, the safe operation of electrical lines is of paramount importance. Overcurrent or short circuits are common electrical faults. If the fault current cannot be effectively cut off in a very short time, it will lead to serious damage to electrical equipment or even cause major safety accidents such as fires.

[0003] To address the risks of overload or short circuit, electrical systems are equipped with various circuit breakers or protection devices that can automatically disconnect the circuit when an abnormal current is detected. However, in many specific industrial environments or in the renovation of old equipment, there are still a large number of switchboards that rely solely on manual operation. These switches themselves do not have automatic tripping and overload protection functions, posing a serious safety hazard.

[0004] To address this issue, some external protection structures have emerged in the existing technology, attempting to provide automatic disconnection for manual gates. These structures also employ the principle of electromagnetic induction. When a fault current is detected, the electromagnetic mechanism generates a mechanical action to attempt to push the gate switch handle. However, these existing external structures generally suffer from mechanical response delays, and their instantaneous mechanical thrust is relatively limited.

[0005] When the gate switch itself has significant mechanical resistance, or in some precision protection applications requiring millisecond-level response, the aforementioned structure with limited thrust and slow response cannot guarantee 100% reliable disconnection. It may even get stuck in the middle state due to insufficient thrust, failing to completely close the gate and thus missing the best protection opportunity, failing to truly solve the safety problem.

[0006] Therefore, this utility model proposes a fast disconnection structure for overload protection of electrical circuits to overcome the shortcomings of the prior art. Utility Model Content

[0007] In view of the problems of response delay, insufficient disconnection speed, complex reset structure and inconvenient operation in the existing fast disconnection structure for overload protection of electrical lines, the present invention aims to provide a fast disconnection structure for overload protection of electrical lines with improved structure that can effectively solve the above problems.

[0008] This utility model provides a quick disconnection structure for overload protection of electrical circuits, comprising: a housing, a compression spring II fixedly connected to the bottom of the inner side of the housing, a plate fixedly connected to the top of the compression spring II, a connecting plate fixedly connected to the front end of the plate, a mounting post fixedly connected to the front end of the connecting plate, a handle plate connected to the plate, a ferrule fixedly connected to the left and right sides inside the housing, and an electromagnetic coil wound on the ferrule. It also includes a fixing block, a connecting column, a disc, a compression spring, and a button.

[0009] The plate has a slot at its rear end, and the fixing block is slidably connected to the slot.

[0010] Furthermore, the connecting post is connected to the fixing block through the hole and fixedly connected to the rear end of the plate. The disc is fixedly connected to the rear end of the connecting post. The compression spring is fixedly connected to the rear end of the disc. The button is fixedly connected to the rear end of the compression spring and slidably connected to the rear side of the housing. Together, they constitute a mechanism for locking and releasing the plate.

[0011] Preferably, the fixing block is made of rare-earth super magnetostrictive alloy material.

[0012] Preferably, the compression spring is made of magnetic material.

[0013] Preferably, it also includes two round tubes, which are fixedly connected to the top and bottom of the outer casing, respectively.

[0014] Preferably, the inside of the circular tube is fixedly connected with an internal thread.

[0015] Preferably, the mounting post has a slot at its front end.

[0016] Preferably, the handle plate is used to press down the flat plate again to compress the compression spring after the circuit is repaired.

[0017] Preferably, when the button is pressed, the compression spring is compressed, driving the connecting post to engage inside the plate and be held in place by the fixing block.

[0018] This utility model has the following beneficial effects: 1. This utility model solves the problems of delayed response and insufficient disconnection of protection devices in the prior art by setting up an electromagnetic coil, a ferrule, a compression spring, and a locking pin mechanism composed of a fixed block and a connecting column. When a circuit fault occurs, the locking pin mechanism releases the connecting column, and the compression spring pushes the plate and the mounting column to move.

[0019] 2. This utility model, by setting a handle plate, button, compression spring and locking cooperation with the fixing block and connecting column, after the fault is cleared, the connecting column can be re-locked by the fixing block by pressing the button and pulling the handle plate, thus realizing the reset of the device, solving the problem of complex reset structure and inconvenient operation of some protection devices in the prior art. Attached Figure Description

[0020] Figure 1 This is a perspective view of the quick-disconnect structure for overload protection of electrical circuits proposed in this utility model; Figure 2 This is a front view of the fast disconnection structure for overload protection of electrical circuits proposed in this utility model; Figure 3 This is a rear view of the quick disconnect structure for overload protection of electrical circuits proposed in this utility model; Figure 4 This is an exploded view of the fixed structure in the quick disconnection structure for overload protection of electrical circuits proposed in this utility model; Figure 5 This is a cross-sectional view of the quick disconnection structure for overload protection of electrical circuits proposed in this utility model.

[0021] Legend: 1. Outer shell; 2. Mounting post; 3. Connecting plate; 4. Flat plate; 5. Handle plate; 6. Fixing block; 7. Connecting post; 8. Disc; 9. Compression spring one; 10. Button; 11. Compression spring two; 12. Electromagnetic coil; 13. Wire rod; 14. Round tube; 15. Internal thread. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Example: Please refer to Figures 1 to 5 This utility model provides a fast disconnection structure for overload protection of electrical lines, which aims to solve the problems of delayed response and complex reset structure of electrical line protection devices after detecting overload in the prior art.

[0024] like Figure 1 and Figure 2As shown, the quick-disconnect structure for overload protection of electrical circuits includes a housing 1, which houses the internal components and provides a mounting base. Two circular tubes 14 are fixedly connected to the top and bottom of the housing 1, respectively. Internal threads 15 are fixedly connected inside the circular tubes 14, which are used to fix the housing 1 to an external gate. Iron coils 13 are fixedly connected to the left and right sides inside the housing 1, and an electromagnetic coil 12 is wound around the iron coils 13. A compression spring 11, made of magnetic material, is fixedly connected to the bottom inner side of the housing 1. A plate 4 is fixedly connected to the top of the compression spring 11, which compresses the compression spring 11 in its initial state. A connecting plate 3 is fixedly connected to the front end of the plate 4. The front end of plate 3 is fixedly connected to mounting post 2. Mounting post 2 has a slot at its front end and is used to engage the gate switch. A handle plate 5 is also connected to plate 4. The handle plate 5 is used to press plate 4 down again after circuit repair. A slot is opened at the rear end of plate 4. Fixing block 6 is slidably connected in the slot. Fixing block 6 is made of rare earth super magnetostrictive alloy material. Connecting post 7 is connected to fixing block 6 through a hole and fixedly connected to the rear end of plate 4. A disc 8 is fixedly connected to the rear end of connecting post 7. Disc 8 is used to assist the connection between connecting post 7 and compression spring 9. Compression spring 9 is fixedly connected to the rear end of disc 8. Button 10 is fixedly connected to the rear end of compression spring 9. Button 10 is slidably connected to the rear side of housing 1.

[0025] To solve the aforementioned technical problems, the core of the technical solution in this embodiment lies in the inclusion of a precision locking and resetting mechanism. Furthermore, this locking and resetting mechanism forms a specific structural fit and connection with the aforementioned plate 4 and outer casing 1. Please refer to [the relevant documentation / reference]. Figure 4 and Figure 5 The core structure will be described in detail below: The rear end of the plate 4 is provided with a slot for receiving, and the fixing block 6 is set in the slot of the plate 4. The fixing block 6 forms a sliding connection with the inner wall of the slot. The fixing block 6 is made of rare earth super magnetostrictive alloy material, and the body of the fixing block 6 is provided with a hole for cooperating with the connecting post 7.

[0026] The rear end of the plate 4 is also provided with a through hole for the connecting post 7 to pass through. The connecting post 7 is slidably inserted into the through hole of the plate 4. The post body of the connecting post 7 is provided with a hole for cooperating with the fixing block 6. In the assembled state, the hole of the fixing block 6 is aligned with the hole of the connecting post 7, and a part of the fixing block 6 is inserted into the hole of the connecting post 7, thereby preventing the connecting post 7 from moving axially relative to the plate 4 in the initial state.

[0027] The rear end of the connecting post 7 is fixedly connected to the disc 8. The disc 8 is used to increase the contact area and assist in the connection between the connecting post 7 and the compression spring 9. The compression spring 9 is sleeved on the outside of the rear end of the connecting post 7. The front end of the compression spring 9 abuts against the rear end of the disc 8. The rear end of the compression spring 9 is fixedly connected to the button 10. The button 10 is slidably connected in the hole opened on the rear side of the housing 1.

[0028] This sliding block and locking pin structure ensures reliable locking and controlled release of the plate 4. When reset is required, the operator presses button 10, which compresses spring 9. Spring 9 pushes the disc 8 and connecting post 7 toward the plate 4 until the hole of the connecting post 7 aligns with the hole of the fixing block 6. At this point, the fixing block 6, which has returned to its original state, is inserted into the hole of the connecting post 7 under the action of elasticity, thus completing the locking.

[0029] As a preferred embodiment, please refer to Figure 1 and Figure 3 To ensure a secure fixation between the device and the gate, two circular tubes 14 are symmetrically fixed to the top and bottom of the outer casing 1. The axes of the circular tubes 14 are perpendicular to the top and bottom surfaces of the outer casing 1. The inner side of the circular tubes 14 is axially fixed with internal threads 15. The pitch and depth of the internal threads 15 are used to match standard fixing bolts. During installation, the fixing bolts pass through the pre-drilled holes on the gate and are screwed into the internal threads 15, thereby firmly fixing the entire outer casing 1 in the designated position. This double fixation at the top and bottom ensures that the device will not shift when subjected to impact forces.

[0030] As a preferred embodiment, please refer to Figure 1 and Figure 2 To ensure reliable driving of the gate switch, the front end of the mounting post 2 is provided with a slot along the axial direction. The internal contour of the slot is designed to tightly fit or bite the switch handle of the gate. Through this slot-type connection, when the plate 4 drives the mounting post 2 to move at high speed, the mounting post 2 can instantly and without delay transmit the thrust to the switch handle.

[0031] As a preferred embodiment, please refer to Figure 4 and Figure 5 In order to achieve electromagnetic control release of the locking pin, the material of the fixing block 6 is preferably a rare earth super magnetostrictive alloy. This high-performance material is highly sensitive to the magnetic field changes generated by the electromagnetic coil 12. The fixing block 6 has a first shape in the initial state, which is used to hold the connecting post 7. When the electromagnetic coil 12 is energized, the fixing block 6 quickly contracts and deforms into a second shape due to the magnetostrictive effect, so that the fixing block 6 can no longer hold the connecting post 7, thereby releasing the connecting post 7.

[0032] As a preferred embodiment, please refer to Figure 5To enhance the electromagnetic effect, the compression spring 11 is preferably made of magnetic material. This design allows the compression spring 11 to function not only as an energy storage element but also as a magnetic medium. The compression spring 11 can converge and guide the magnetic circuit generated by the electromagnetic coil 12 and the ferrule 13, so that the magnetic field acts more concentratedly on the fixed block 6. Furthermore, the compression spring 11 will generate a stronger driving force under the combined action of the impact of the ferrule 13 and the electromagnetic force.

[0033] Working principle: In the initial state, the outer shell 1 is first fixed to the gate through the internal thread 15 inside the round tube 14 and the external bolt. Then, the slot at the front end of the mounting column 2 bites the switch of the gate. At this time, the plate 4 is pressed down by the handle plate 5 and forcibly compresses the compression spring 11. At the same time, the operator presses the button 10. The button 10 compresses the compression spring 9. The compression spring 9 pushes the disc 8 and the connecting column 7 to move towards the plate 4. The connecting column 7 passes through the plate 4 and enters the interior of the plate 4. At this time, the fixed block 6, which has been restored to its original state, is stuck in the slot and the connecting post 7 is locked. After the button 10 and the handle plate 5 are released, the connecting post 7 is locked by the fixed block 6, the plate 4 is locked by the connecting post 7, and the compression spring 11 is in a compressed standby state. When the circuit fails, because the device is installed together with the gate, the current will approach the electromagnetic coil 12. The electromagnetic coil 12 will generate electromagnetic force when energized. The electromagnetic force will drive the iron 13 to move, and the electromagnetic force will also approach the compression spring 11, which is made of magnetic material. When the compression spring 11 is subjected to electromagnetic force, the compression spring 11 will transmit the electromagnetic force to the fixed block 6 inside the plate 4 connected to the compression spring 11. The fixed block 6 is made of rare earth super magnetostrictive alloy. When the fixed block 6 is subjected to force, it will undergo macroscopic deformation or contraction. When the fixing block 6 shrinks and deforms, it can no longer restrain the connecting post 7. At this time, the compression force of the compression spring 9, which is always in a pre-compressed state, will immediately send the connecting post 7 back to its original position through the disc 8, so that the connecting post 7 is disengaged from the locking hole of the plate 4. In this way, the plate 4 will no longer restrain the compression spring 11. The compression spring 11 will be released under the combined action of its own elasticity and the force generated by the impact of the iron 13. When the compression spring 11 violently impacts the plate 4, the plate 4 drives the connecting plate 3 and the mounting post 2 to move together. The mounting post 2 will close the gate switch to achieve rapid disconnection. When the circuit is repaired, the handle plate 5 is facing upward. Pull the handle plate 5 down, and the plate 4 will recompress the compression spring 11. Then press the button 10 to compress the compression spring 9 and let the connecting post 7 enter the interior of the plate 4. The connecting post 7 will be locked again by the restored fixing block 6, so that the device returns to its original state.

Claims

1. A fast-disconnect structure for overload protection of electrical circuits, including: The outer shell (1), compression spring 2 (11), plate (4), connecting plate (3), mounting post (2), electromagnetic coil (12) and ferrule (13) are fixedly connected to the bottom of the inner side of the outer shell (1), the plate (4) is fixedly connected to the top of the compression spring 2 (11), the connecting plate (3) is fixedly connected to the front end of the plate (4), the mounting post (2) is fixedly connected to the front end of the connecting plate (3), and the electromagnetic coil (12) and the ferrule (13) are both fixedly connected to the inside of the outer shell (1). The plate (4) is characterized by having a slot at its rear end, a fixing block (6) being slidably connected to the slot, a connecting post (7) being inserted through the rear end of the plate (4) and held in place by the fixing block (6), a disc (8) being fixedly connected to the rear end of the connecting post (7), a compression spring (9) being fixedly connected to the rear end of the disc (8), and a button (10) being fixedly connected to the rear end of the compression spring (9) and slidably connected to the rear side of the outer shell (1).

2. The fast disconnection structure for overload protection of electrical circuits according to claim 1, characterized in that, It also includes a handle plate (5), which is connected to the plate (4) and is used to press down the plate (4) again to compress the compression spring (11) after the circuit is repaired.

3. The fast disconnection structure for overload protection of electrical circuits according to claim 1, characterized in that, The fixing block (6) is made of rare earth super magnetostrictive alloy material.

4. The fast disconnection structure for overload protection of electrical circuits according to claim 1, characterized in that, The compression spring 2 (11) is made of magnetic material.

5. The fast disconnection structure for overload protection of electrical circuits according to claim 1, characterized in that, It also includes two round tubes (14), which are fixedly connected to the top and bottom of the outer shell (1), respectively.

6. The quick-disconnect structure for overload protection of electrical circuits according to claim 5, characterized in that, The inner thread (15) is fixedly connected to the inside of the round tube (14).

7. The fast disconnection structure for overload protection of electrical circuits according to claim 1, characterized in that, The ductile iron (13) is fixedly connected to the left and right sides inside the outer shell (1), and the electromagnetic coil (12) is wound on the ductile iron (13).

8. The fast disconnection structure for overload protection of electrical circuits according to claim 1, characterized in that, When the button (10) is pressed, the compression spring (9) is compressed, driving the connecting post (7) to engage inside the plate (4) and be held in place by the fixing block (6).

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