Leakage protector with fool-proof structure

Abstract

The invention belongs to the technical field of electrical products, and discloses a leakage protector with a fool-proof structure, which comprises a leakage protector body, an air circuit breaker and a rotatable interlocking handle arranged on the front surface of the air circuit breaker, the air circuit breaker is provided with a trigger type fool-proof shielding mechanism, and the trigger type fool-proof shielding mechanism comprises a sectional shielding cover and a linkage trigger assembly. The live wire wiring groove is provided with a temperature sensing type live wire automatic pull-off mechanism. Through the above mode, when an electric leakage phenomenon occurs, the electric leakage protector body enables the linkage handle on the air circuit breaker to rotate downwards through the easy-to-install linkage mechanism, and when the linkage handle rotates, the linkage trigger assembly drives the sectional shielding cover to move so as to completely shield the linkage handle. Therefore, the situation that non-professionals reset the interlocking handle by mistake is avoided. When spontaneous combustion occurs, the temperature sensing type live wire automatic pull-off mechanism can automatically pull off the live wire from the live wire wiring groove, and the fire behavior is prevented from being further increased.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical products, and particularly relates to a leakage protector with an anti-fooling structure. Background Art

[0002] A leakage protector is a safety device used to detect leakage faults in a circuit, which can quickly cut off the power supply to prevent electric shock or electrical fire.

[0003] Chinese Patent CN117976484B discloses an automatic reclosing leakage protector, including a leakage protector body. A vertically arranged power housing is fixed on one side of the leakage protector body, and a plug rod is fixed on the switch push rod of the leakage protector body. When the leakage protector body heats up and burns out, the generated thick smoke is sucked into the circulation air box. When the smoke concentration sensor in the intake straight pipe detects thick smoke, the second drive motor rotates in reverse, the gas is exhausted upward through the intake straight pipe, and the air blocking cone block is pushed upward, ejecting the sliding top pipe, so that the gas is discharged into the interior of the leakage protector body through the conduction top pipe. At the same time, the inside of the dry powder storage box is opened, and the dry powder is ejected through the powder spraying pipe and enters the interior of the leakage protector body along with the air flow to extinguish the generated flames. However, the device still has the following problems: After the leakage protector trips due to leakage, the circuit may still be in a faulty state. If it is manually reset without thoroughly investigating the cause of the fault, especially if non-professionals accidentally touch to restore power supply, it may lead to secondary electric shock or expand the fault, and blindly restoring power may cover up the real fault point, interfere with the repair, and increase the difficulty of troubleshooting.

[0004] Based on this, the present invention designs a leakage protector with an anti-fooling structure to solve the above problems. Summary of the Invention

[0005] In view of the above-mentioned drawbacks of the prior art, the present invention provides a leakage protector with an anti-fooling structure.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A leakage protector with an anti-fooling structure includes a leakage protector body, an air circuit breaker, and a rotatable interlocking handle arranged on the front of the air circuit breaker; A trigger-type anti-fooling shielding mechanism is arranged on the air circuit breaker. The trigger-type anti-fooling shielding mechanism includes a segmented shielding cover and a linkage trigger component. The segmented shielding cover is arranged on the front of the air circuit breaker and above the interlocking handle, and the linkage trigger component is installed on the left side wall of the air circuit breaker. The linkage trigger component is used to control the segmented shielding cover to completely shield the interlocking handle when a leakage phenomenon occurs and triggers the interlocking handle to drop; The air circuit breaker has a live wire connection slot and a neutral wire connection slot symmetrically disposed on both sides of the upper end thereof for connecting to an external live wire and a neutral wire; the live wire connection slot is provided with a temperature-sensitive live wire automatic pulling-off mechanism for automatically pulling the live wire out of the live wire connection slot when the protector catches fire; An end of the leakage protector body close to the air circuit breaker is provided with an easy-to-install interlocking mechanism for linking with the interlocking handle to trigger the rotation of the interlocking handle.

[0007] Furthermore, the linkage trigger assembly includes a linkage shaft, an outer sleeve, a connecting plate and a one-way linkage assembly. The linkage shaft is located on the left side of the air circuit breaker and passes through the side wall of the air circuit breaker and is fixedly connected to the interlocking handle. The rotation axes of the linkage shaft and the interlocking handle are collinear, so that the linkage shaft and the interlocking handle rotate synchronously; the outer sleeve is rotatably connected to the left side wall of the linkage shaft through a bearing, and the two ends of the connecting plate are respectively fixedly connected to the outer sleeve and the segmented shielding cover; a one-way linkage assembly is provided between the linkage shaft and the outer sleeve, which enables the linkage shaft to drive the outer sleeve to rotate synchronously when it rotates in a clockwise direction.

[0008] Furthermore, the one-way linkage assembly includes a ratchet, a bracket, a ratchet and a first spring. The ratchet is fixedly mounted on the inner edge of the outer sleeve, and a plurality of brackets are evenly fixedly mounted on the outer ring surface of the linkage shaft in a circular array. One end of the ratchet is hinged to the bracket, and a first spring is fixedly mounted between the other end of the ratchet and the bracket; the ratchet is clamped with the ratchet, and the ratchet extends to the outside of the outer sleeve.

[0009] Furthermore, a card block is fixedly mounted on one end of the outer plate away from the middle plate, a card slot is provided on the card block, and a locking structure which is locked and connected to the card slot of the card block is fixedly mounted on the lower end of the air circuit breaker.

[0010] Furthermore, the temperature-sensing live wire automatic pulling-out mechanism includes a clamping and pulling-out component and a temperature-sensing driving component. A clamping and pulling-out component for clamping the live wire and pulling the live wire out of the live wire wiring slot is provided on the side of the live wire wiring slot, and a temperature-sensing driving component for providing power to the clamping and pulling-out component is provided in the cavity of the air circuit breaker.

[0011] Furthermore, the clamping and pulling-off assembly includes a fixed plate, a sliding pin, a clamping block and a lifting plate, the fixed plate and the lifting plate are respectively located on the front and rear sides of the live wire connection slot, the fixed plate is fixedly connected to the air circuit breaker, and the lifting plate is limitedly and slidably connected to the air circuit breaker; the two clamping blocks are symmetrically arranged on the left and right sides of the lifting plate, and the clamping blocks can be connected to the lifting plate in a horizontally limited manner; a sliding groove is opened on the fixed plate, and a sliding pin is fixedly installed on the clamping block that is limitedly and slidably connected to the sliding groove.

[0012] Furthermore, the slide slot is composed of a combination of an oblique slot on the lower side and a vertical slot on the upper side, and the oblique slot is arranged to be inclined toward the live wire connection slot.

[0013] Furthermore, the easy-to-install interlocking mechanism includes a linkage rod, a third spring, a circular plate and a driving plate. The linkage rod is limitedly slidably connected inside the tripping interlocking rod of the electromagnetic tripping device of the leakage protector body. The linkage rod is fixedly installed with a circular plate at one end located in the air circuit breaker cavity. The third spring is sleeved on the outside of the linkage rod, and the two ends of the third spring are respectively fixedly connected to the linkage rod and the circular plate; when the third spring is in a natural state, the linkage rod is completely retracted into the tripping interlocking rod, and the tripping interlocking rod and the linkage rod are not exposed outside the leakage protector body; the driving plate is installed on the leakage protector body so as to be movably installed left and right, and the lower end of the driving plate abuts against the circular plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. When leakage occurs, the leakage protector body rotates the interlocking handle on the air circuit breaker downward through an easy-to-install interlocking mechanism. When the interlocking handle rotates, the segmented shielding cover will be driven to move through the linkage trigger component, so that the segmented shielding cover will completely shield the interlocking handle, thereby preventing non-professionals from resetting the interlocking handle by mistake; when the leakage protector body and the air circuit breaker spontaneously combust due to abnormal overtemperature, the temperature-sensing live wire automatic pull-out mechanism will automatically pull the live wire out of the live wire wiring slot to prevent the fire from further increasing.

[0015] 2. When the troubleshooting work is completed, the maintenance personnel first control the locking structure to release the locking effect of the card block, and then pinch the extended part of the ratchet located on the outside of the outer sleeve to lift the segmented shielding cover. Release the ratchet to achieve the reset effect of the segmented shielding cover, and when it is necessary to lift the interlocking handle, the ratchet will not block the movement of the ratchet, and the linkage shaft and the interlocking handle can rotate smoothly.

[0016] 3. By setting up an easy-to-install interlocking mechanism, when performing maintenance work on the leakage protector body or the air circuit breaker, the operator only needs to disassemble the leakage protector body or the air circuit breaker. In the case of limited space, such as in an electrical cabinet where a large number of electrical components have been installed, the installation of the entire leakage protector can also be facilitated. After the leakage protector body and the air circuit breaker are installed and aligned, the driving board controls the linkage rod to extend into the air circuit breaker, thereby realizing the interlocking drive effect of the linkage rod on the interlocking handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1Three-dimensional view of a leakage protector with an anti-fooling structure according to the present invention Figure 1 。

[0019] Figure 2 Front view of a leakage protector with an anti-fooling structure according to the present invention.

[0020] Figure 3 Three-dimensional view of a leakage protector with an anti-fooling structure according to the present invention Figure 2 。

[0021] Figure 4 Cutaway three-dimensional view of the air circuit breaker according to the present invention.

[0022] Figure 5 For Figure 3 Enlarged view of part A in

[0023] Figure 6 Three-dimensional view of the segmented shielding cover according to the present invention.

[0024] Figure 7 Three-dimensional view of a leakage protector with an anti-fooling structure according to the present invention Figure 3 。

[0025] Figure 8 Cutaway three-dimensional view of the leakage protector body according to the present invention.

[0026] The reference numerals in the figure respectively represent: 10, leakage protector body; 20, air circuit breaker; 21, live wire connection slot; 22, neutral wire connection slot; 23, interlocking handle; 3, trigger-type anti-fooling shielding mechanism; 31, segmented shielding cover; 311, inner plate; 312, intermediate plate; 313, outer plate; 32, linkage trigger assembly; 321, linkage shaft; 322, outer sleeve; 323, connecting plate; 324, clamping block; 325, locking structure; 326, ratchet; 327, bracket; 328, ratchet teeth; 329, first spring; 4, temperature-sensitive live wire automatic pulling-off mechanism; 41, clamping and pulling-off assembly; 411, fixing plate; 412, sliding pin; 413, clamping block; 414, lifting plate; 42, temperature-sensitive driving assembly; 421, ejector rod; 422, fixed cylinder; 423, strong magnet; 424, weak magnet; 425, second spring; 5, easy-to-install interlocking mechanism; 51, tripping interlocking rod; 52, linkage rod; 53, third spring; 54, circular plate; 55, driving plate. Detailed implementation manners

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The terms “left”, “right”, “front”, “back”, “up” and “down” mentioned in the following description are oriented in the viewing direction of the front view.

[0029] Embodiment 1: In some embodiments, please refer to the drawings of the specification Figures 1-4 , a leakage protector with a foolproof structure, comprising a leakage protector body 10, an air circuit breaker 20 and a rotatable interlocking handle 23 arranged on the front of the air circuit breaker 20; The air circuit breaker 20 is provided with a trigger-type foolproof shielding mechanism 3, which includes a segmented shielding cover 31 and a linkage triggering assembly 32. The segmented shielding cover 31 is arranged on the front of the air circuit breaker 20 and is located on the upper side of the interlocking handle 23. The linkage triggering assembly 32 is installed on the left side wall of the air circuit breaker 20. The linkage triggering assembly 32 is used to control the segmented shielding cover 31 to completely shield the interlocking handle 23 when the interlocking handle 23 is triggered and falls when leakage occurs; an alarm mark is arranged on the front of the segmented shielding cover 31 to remind non-professionals not to manually reset it without authorization; The air circuit breaker 20 has a live wire connection slot 21 and a neutral wire connection slot 22 symmetrically disposed on both sides of the upper end thereof for connecting to an external live wire and a neutral wire; the live wire connection slot 21 is provided with a temperature-sensitive live wire automatic pulling-off mechanism 4 for automatically pulling the live wire out of the live wire connection slot 21 when the protector catches fire; An end of the leakage protector body 10 close to the air circuit breaker 20 is provided with an easy-to-install interlocking mechanism 5 for interlocking with the interlocking handle 23 to trigger the rotation of the interlocking handle 23 .

[0030] In the present invention, when leakage occurs, the leakage protector body 10 rotates the interlocking handle 23 on the air circuit breaker 20 downward through the easy-to-install interlocking mechanism 5. When the interlocking handle 23 rotates, the segmented shielding cover 31 will be driven to move through the linkage trigger component 32, so that the segmented shielding cover 31 completely shields the interlocking handle 23, thereby preventing non-professionals from resetting the interlocking handle 23 by mistake; when the leakage protector body 10 and the air circuit breaker 20 spontaneously combust due to abnormal overheating, the temperature-sensing live wire automatic pull-out mechanism 4 will automatically pull the live wire out of the live wire wiring slot 21 to prevent the fire from further increasing.

[0031] Please refer to Figure 6 , the segmented shielding cover 31 is composed of an inner plate 311, an outer plate 313 and a plurality of intermediate plates 312 located between the inner plate 311 and the outer plate 313. A chute is provided on the inner side of the inner plate 311, a slider is fixedly installed on the outer side of the outer plate 313, a chute is provided on the inner side of the intermediate plate 312, and a slider is fixedly installed on the outer side of the intermediate plate 312. The adjacent intermediate plates 312, between the intermediate plate 312 and the inner plate 311, and between the intermediate plate 312 and the outer plate 313 are limited and slidably connected through the slider and the chute; the inner plate 311, the intermediate plate 312 and the outer plate 313 are all located on the same circumference; the inner plate 311 is fixedly connected to the air circuit breaker 20; Please refer to Figure 3 and Figure 5 , the linkage trigger assembly 32 includes a linkage shaft 321, an outer sleeve 322, a connecting plate 323 and a one-way linkage assembly. The linkage shaft 321 is located on the left side of the air circuit breaker 20 and penetrates through the side wall of the air circuit breaker 20 to be fixedly connected to the interlocking handle 23. The rotation axes of the linkage shaft 321 and the interlocking handle 23 are collinear, so that the linkage shaft 321 and the interlocking handle 23 rotate synchronously; the outer sleeve 322 is rotatably connected to the left side wall of the linkage shaft 321 through a bearing, and the two ends of the connecting plate 323 are respectively fixedly connected to the outer sleeve 322 and the outer plate 313; a one-way linkage assembly is provided between the linkage shaft 321 and the outer sleeve 322, so that when the linkage shaft 321 rotates clockwise, it will drive the outer sleeve 322 to rotate synchronously; The one-way linkage assembly includes a ratchet wheel 326, a bracket 327, a ratchet tooth 328 and a first spring 329. The ratchet wheel 326 is fixedly installed on the inner edge of the outer sleeve 322. A plurality of brackets 327 are evenly fixedly installed on the outer ring surface of the linkage shaft 321 in a circumferential and equidistant manner. One end of the ratchet tooth 328 is hinged to the bracket 327, and a first spring 329 is fixedly installed between the other end of the ratchet tooth 328 and the bracket 327; the ratchet tooth 328 is engaged with the ratchet wheel 326, and the ratchet tooth 328 extends towards the outside of the outer sleeve 322; A latch 324 is also fixedly installed at one end of the outer plate 313 away from the intermediate plate 312. A slot is provided on the latch 324, and a locking structure 325 fixedly connected to the slot of the latch 324 is fixedly installed at the lower end of the air circuit breaker 20; the locking structure 325 can adopt an electromagnetic lock, a spring lock, etc., so that after the connecting plate 323 drives the outer plate 313 to rotate, the locking tongue of the locking structure 325 can be locked and connected to the slot of the latch 324; In the present invention, when a leakage occurs, the interlocking handle 23 will rotate and fall. The interlocking handle 23 drives the linkage shaft 321 to rotate synchronously. The linkage shaft 321 drives the outer sleeve 322 to rotate synchronously through the cooperation of the ratchet 326 and the ratchet teeth 328. Then, the outer plate 313 is driven to rotate by the connecting plate 323 to achieve the shielding effect on the interlocking handle 23. When the segmented shielding cover 31 is fully unfolded, the lock tongue of the locking structure 325 is locked with the card slot of the card block 324, preventing the segmented shielding cover 31 from being directly pulled up, and further improving the anti-fooling effect of the segmented shielding cover 31. When the operation and maintenance personnel complete the troubleshooting operation, first control the locking structure 325 to release the locking effect on the card block 324. Then, pinch the extended part of the ratchet teeth 328 outside the outer sleeve 322 inward, and the segmented shielding cover 31 can be lifted. Releasing the ratchet teeth 328 can achieve the reset effect of the segmented shielding cover 31. And when it is necessary to lift the interlocking handle 23, the ratchet 326 will not block the movement of the ratchet teeth 328, and both the linkage shaft 321 and the interlocking handle 23 can rotate smoothly.

[0032] Please refer to Figure 4 , the temperature-sensitive live wire automatic pulling-off mechanism 4 includes a clamping and pulling-off assembly 41 and a temperature-sensitive driving assembly 42. A clamping and pulling-off assembly 41 for clamping the live wire and pulling the live wire out of the live wire connection slot 21 is arranged on the side of the live wire connection slot 21, and a temperature-sensitive driving assembly 42 for providing power for the clamping and pulling-off assembly 41 is arranged in the cavity of the air circuit breaker 20. The clamping and pulling-off assembly 41 includes a fixing plate 411, a sliding pin 412, clamping blocks 413 and a lifting plate 414. The fixing plate 411 and the lifting plate 414 are respectively located on the front and rear sides of the live wire connection slot 21. The fixing plate 411 is fixedly connected to the air circuit breaker 20, and the lifting plate 414 is connected to the air circuit breaker 20 in a limited sliding manner. Two clamping blocks 413 are symmetrically arranged on the left and right sides of the lifting plate 414, and the clamping blocks 413 are connected to the lifting plate 414 in a horizontally limited moving manner. A chute is formed on the fixing plate 411, and a sliding pin 412 fixedly installed on the clamping block 413 is connected to the chute in a limited sliding manner. The chute is composed of an inclined groove on the lower side and a vertical groove on the upper side, and the inclined groove is arranged to incline towards the live wire connection slot 21. When the lifting plate 414 moves vertically upward, the sliding pin 412 first slides in the inclined groove, causing the two clamping blocks 413 to move towards each other. When the sliding pin 412 slides in the vertical groove, the clamping blocks 413 move vertically upward. The temperature-sensing driving assembly 42 includes a push rod 421, a fixed cylinder 422, a strong magnet 423, a weak magnet 424 and a second spring 425. The fixed cylinder 422 is fixedly installed in the cavity of the air circuit breaker 20. Inside the fixed cylinder 422, a weak magnet 424, a second spring 425 and a strong magnet 423 are arranged in sequence from top to bottom. Both the strong magnet 423 and the weak magnet 424 are slidably connected to the inner wall of the fixed cylinder 422. The weak magnet 424 is fixedly connected to the inner bottom of the fixed cylinder 422. Two ends of the second spring 425 are respectively fixedly connected to the strong magnet 423 and the weak magnet 424; the lower end of the push rod 421 is fixedly connected to the strong magnet 423, and the upper end of the push rod 421 is fixedly connected to the lifting plate 414; In the invention, when the temperature inside the leakage protector body 10 and the air circuit breaker 20 continuously rises until reaching the Curie temperature of the strong magnet 423, the strong magnet 423 is pushed upward by the second spring 425, so that the lifting plate 414 is pushed upward by the push rod 421. During the vertical upward movement of the lifting plate 414, the clamping block 413 first clamps and fixes the live wire under the cooperation of the sliding pin 412 and the chute, and then pulls the live wire upward from the live wire connection groove 21 to pull off the live wire, so as to automatically separate the live wire from the live wire connection groove 21 when the leakage protector body 10 and the air circuit breaker 20 have abnormal temperature loss, so as to avoid the possibility of further expansion of the fire. Please refer to Figure 2 、 Figure 7 and Figure 8 As shown in, the easy-installation interlocking mechanism 5 includes a linkage rod 52, a third spring 53, a circular plate 54 and a driving plate 55. A linkage rod 52 is installed in the tripping interlocking rod 51 of the electromagnetic tripping device of the leakage protector body 10 in a limited and sliding manner. One end of the linkage rod 52 located inside the cavity of the air circuit breaker 20 is fixedly installed with a circular plate 54. The third spring 53 is sleeved outside the linkage rod 52, and two ends of the third spring 53 are respectively fixedly connected to the linkage rod 52 and the circular plate 54; in the natural state of the third spring 53, the linkage rod 52 is completely retracted into the tripping interlocking rod 51, and neither the tripping interlocking rod 51 nor the linkage rod 52 is exposed outside the leakage protector body 10; The driving plate 55 is installed on the leakage protector body 10 so as to be movable left and right. The lower end of the driving plate 55 abuts against the circular plate 54. The upper end of the driving plate 55 is provided with a matching screw hole on the leakage protector body 10. When a screw is installed in the screw hole to make the driving plate 55 relatively fixed to the leakage protector body 10, the third spring 53 is compressed, and the left end of the linkage rod 52 extends outside the leakage protector body 10 for cooperating with the interlocking handle 23 to control the rotation of the interlocking handle 23.

[0033] By setting up the easy-to-install interlocking mechanism 5, when performing maintenance operations on the residual current operated circuit breaker body 10 or the air circuit breaker 20, the operator can only disassemble the residual current operated circuit breaker body 10 or the air circuit breaker 20. And in the case of limited space, such as in an electrical cabinet where a large number of electrical components have been installed, the installation operation of the entire residual current operated circuit breaker can also be facilitated. After the residual current operated circuit breaker body 10 and the air circuit breaker 20 are installed and aligned, the linkage rod 52 is controlled by the drive plate 55 to extend into the air circuit breaker 20, realizing the interlocking drive effect of the linkage rod 52 on the interlocking handle 23.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A leakage protector with a foolproof structure, comprising a leakage protector body (10), an air circuit breaker (20), and a rotatable interlocking handle (23) arranged on the front of the air circuit breaker (20), characterized in that: The air circuit breaker (20) is provided with a trigger-type foolproof shielding mechanism (3), the trigger-type foolproof shielding mechanism (3) comprising a segmented shielding cover (31) and a linkage triggering assembly (32), the segmented shielding cover (31) being arranged on the front of the air circuit breaker (20) and located on the upper side of the interlocking handle (23), the linkage triggering assembly (32) being installed on the left side wall of the air circuit breaker (20), the linkage triggering assembly (32) being used to control the segmented shielding cover (31) to completely shield the interlocking handle (23) when a leakage phenomenon occurs and the interlocking handle (23) is triggered so that the interlocking handle (23) falls down; A live wire connection slot (21) and a neutral wire connection slot (22) for connecting to an external live wire and a neutral wire are provided at symmetrical positions on both sides of the upper end of the air circuit breaker (20); a temperature-sensitive live wire automatic pulling-off mechanism (4) is provided on the live wire connection slot (21) for automatically pulling the live wire out of the live wire connection slot (21) when the protector catches fire; An easy-to-install interlocking mechanism (5) for interlocking with the interlocking handle (23) to trigger the rotation of the interlocking handle (23) is provided at one end of the leakage protector body (10) close to the air circuit breaker (20).

2. The leakage protector with foolproof structure according to claim 1, characterized in that: The linkage trigger assembly (32) comprises a linkage shaft (321), an outer sleeve (322), a connecting plate (323) and a one-way linkage assembly. The linkage shaft (321) is located on the left side of the air circuit breaker (20) and penetrates the side wall of the air circuit breaker (20) to be fixedly connected to the interlocking handle (23). The rotation axes of the linkage shaft (321) and the interlocking handle (23) are colinear, so that the linkage shaft (321) and the interlocking handle (23) rotate synchronously. The outer sleeve (322) is rotatably connected to the left side wall of the linkage shaft (321) via a bearing. The two ends of the connecting plate (323) are respectively fixedly connected to the outer sleeve (322) and the segmented shielding cover (31). A one-way linkage assembly is provided between the linkage shaft (321) and the outer sleeve (322) so that when the linkage shaft (321) rotates in a clockwise direction, the outer sleeve (322) is driven to rotate synchronously.

3. The leakage protector with foolproof structure according to claim 2, characterized in that: The one-way linkage assembly comprises a ratchet (326), a bracket (327), a ratchet tooth (328) and a first spring (329); the ratchet (326) is fixedly mounted on the inner edge of the outer sleeve (322); a plurality of brackets (327) are evenly fixedly mounted on the outer annular surface of the linkage shaft (321) in a circumferentially equal row; one end of the ratchet tooth (328) is hinged to the bracket (327); a first spring (329) is fixedly mounted between the other end of the ratchet tooth (328) and the bracket (327); the ratchet tooth (328) is clamped with the ratchet (326), and the ratchet tooth (328) extends toward the outside of the outer sleeve (322).

4. The leakage protector with fool-proof structure according to claim 3, characterized in that: A clamping block (324) is fixedly mounted on one end of the outer plate (313) away from the middle plate (312), a clamping slot is provided on the clamping block (324), and a locking structure (325) is fixedly mounted on the lower end of the air circuit breaker (20) and is locked and connected to the clamping slot of the clamping block (324).

5. The leakage protector with fool-proof structure according to claim 4, characterized in that: The temperature-sensitive live wire automatic pulling-off mechanism (4) comprises a clamping and pulling-off assembly (41) and a temperature-sensitive driving assembly (42); a clamping and pulling-off assembly (41) for clamping the live wire and pulling the live wire out of the live wire wiring slot (21) is arranged on a side of the live wire wiring slot (21); and a temperature-sensitive driving assembly (42) for providing power to the clamping and pulling-off assembly (41) is arranged in the cavity of the air circuit breaker (20).

6. The leakage protector with foolproof structure according to claim 5, characterized in that: The clamping and pulling assembly (41) comprises a fixed plate (411), a sliding pin (412), a clamping block (413) and a lifting plate (414); the fixed plate (411) and the lifting plate (414) are respectively located at the front and rear sides of the live wire connection slot (21); the fixed plate (411) is fixedly connected to the air circuit breaker (20); and the lifting plate (414) is limitedly slidably connected to the air circuit breaker (20); two clamping blocks (413) are symmetrically arranged on the left and right sides of the lifting plate (414); and the clamping blocks (413) are connected to the lifting plate (414) in a horizontally limited manner; a sliding slot is provided on the fixed plate (411); and a sliding pin (412) is fixedly mounted on the clamping block (413) and is limitedly slidably connected to the sliding slot.

7. The leakage protector with fool-proof structure according to claim 6, characterized in that: The slide groove is composed of a lower oblique groove and an upper vertical groove, and the oblique groove is arranged to be inclined toward the live wire connection groove (21).

8. The leakage protector with fool-proof structure according to claim 7, characterized in that: The easy-to-install interlocking mechanism (5) comprises a linkage rod (52), a third spring (53), a circular plate (54) and a drive plate (55); a tripping interlocking rod (51) of an electromagnetic tripping device of the leakage protector body (10) is limitedly slidably connected with the linkage rod (52); a circular plate (54) is fixedly mounted on one end of the linkage rod (52) located in the cavity of the air circuit breaker (20); the third spring (53) is sleeved on the outside of the linkage rod (52), and the two ends of the third spring (53) are respectively fixedly connected to the linkage rod (52) and the circular plate (54); when the third spring (53) is in a natural state, the linkage rod (52) is completely retracted into the tripping interlocking rod (51), and the tripping interlocking rod (51) and the linkage rod (52) are not exposed outside the leakage protector body (10); the drive plate (55) is mounted on the leakage protector body (10) so as to be movable leftward and rightward, and the lower end of the drive plate (55) is in contact with the circular plate (54).

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