A leakage disconnection protection system and method for a plastic case circuit breaker

Abstract

The present invention discloses a leakage disconnection protection system and method of a plastic case circuit breaker, comprising a housing, a groove is provided on the back of the housing, a clamping mechanism is provided inside the groove, a protection chamber is provided inside the housing, a limit assembly is provided inside the protection chamber, the limit assembly comprises a fixed shaft, the fixed shaft is fixedly connected to the back of the inner wall of the protection chamber and the side opposite to the front of the inner wall of the housing, and a rotating sleeve is rotatably connected to the surface of the fixed shaft, and the present invention relates to the technical field of circuit breakers. The leakage disconnection protection system and method of a plastic case circuit breaker enable the sliding sleeve to move in the sliding rail through the cooperation of the through groove and the first swing arm, and the first limit tooth is limited by the second limit tooth, so that when the circuit breaker is released, the position of the clamping plate can be locked, so that the clamping plate is clamped on the object to be fixed, thereby ensuring the stability of the circuit breaker after installation and preventing the circuit breaker from shaking.

Description

Technical Field

[0001] The invention relates to the technical field of circuit breakers, and in particular to a leakage disconnection protection system and method for a plastic case circuit breaker. Background Art

[0002] A circuit breaker refers to a switching device that can close, carry and disconnect current under normal circuit conditions and can 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, and those above 3kV are generally called high-voltage electrical appliances.

[0003] When in use, the circuit breaker is generally clamped in the electrical box or the installation location by a clamping mechanism set at the back. This installation method causes the circuit breaker to shake easily after installation and easily fall off if accidentally touched. In addition, the wires connected to the connector end are not fixed, causing the terminal to loosen. In addition, circuit breakers are generally installed together. If they are too close, mutual interference may occur. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a leakage disconnection protection system and method for a plastic case circuit breaker, which solves the problems of unstable installation of the prior circuit breaker, easy loosening of the terminal wires and possible interference when multiple circuit breakers are installed together.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A leakage disconnection protection system and method for a plastic case circuit breaker, comprising a housing, a groove is provided on the back of the housing, a clamping mechanism is provided inside the groove, a protection chamber is provided inside the housing, a limit assembly is provided inside the protection chamber, the limit assembly comprises a fixed shaft, the fixed shaft is fixedly connected to the back of the inner wall of the protection chamber and the side opposite to the front of the inner wall of the housing, a second rotating sleeve is rotatably connected to the surface of the fixed shaft, a first swing rod is fixedly connected to the right side of the second rotating sleeve, a sliding groove is provided inside the second rotating sleeve, a second swing rod is slidably connected to the inner surface of the first swing rod, a sliding sleeve is slidably connected to the surface of the second swing rod, a first reset spring is fixedly connected to one end of the second swing rod that penetrates the sliding sleeve and extends to the inside of the sliding sleeve, the other end of the first reset spring is fixedly connected to the inner wall of the sliding sleeve, the other end of the first reset spring is provided with a first limit tooth, a slide rail is provided on the front of the inner wall of the protection chamber, a second limit tooth matching the first limit tooth is provided inside the slide rail, and a disassembly assembly is provided inside the fixed shaft;

[0006] The disassembly assembly includes a circular slide groove opened on the inner wall of the fixed shaft, the inner surface of the circular slide groove is slidably connected with a circular slider, the left side of the circular slider is fixedly connected with a connecting shaft, the surface of the connecting shaft is fixedly connected with a first bevel gear, the left side of the inner wall of the fixed shaft is fixedly connected with a second fixed rod, the connecting shaft is slidably connected to the surface of the second fixed rod, the surface of the second fixed rod located outside the connecting shaft is sleeved with a second return spring, the internal thread of the second rotating sleeve is connected with a threaded rod, the threaded rod passes through the second rotating sleeve and extends to one end inside the fixed shaft and is fixedly connected with the second bevel gear.

[0007] Preferably, the surface of the threaded rod located inside the slide groove is threadedly connected to the right side of the second rocker arm, the threaded rod passes through the second rocker arm and extends to the inside of the second rocker arm, and a spline groove is provided on the top of the circular slider, and the spline groove cooperates with the key.

[0008] Preferably, the clamping mechanism includes two left and right first fixing rods, the two first fixing rods are fixedly connected to the top of the inner wall of the groove, the surfaces of the two first fixing rods are slidably connected with a clamping plate, the surface of the first fixing rod located between the top of the inner wall of the groove and the opposite side of the top of the clamping plate is sleeved with a limit spring, the top of the clamping plate is fixedly connected with two left and right guide rods, the guide rods pass through the outer shell and extend to the interior of the protective chamber, the guide rod located on the right side is provided with a through slot, and the first rocker rod is located inside the through slot.

[0009] Preferably, wiring ports are provided at the top and bottom of the shell, and an upper wiring terminal and a lower wiring terminal are clamped inside the shell, the upper wiring terminal is located above the lower wiring terminal, and a locking screw is threadedly connected to the front of the upper wiring terminal, and the locking screw passes through the upper wiring terminal and extends to one end inside the upper wiring terminal and is rotatably connected to a first rotating sleeve, and the other end of the first rotating sleeve is fixedly connected to a pressure plate.

[0010] Preferably, a pressure plate is fixedly connected to the top of the first rotating sleeve, and the pressure plate is slidably connected to a groove opened in the inner wall of the shell. The other end of the pressure plate is fixedly connected to an arc plate, and the arc plate can be moved to the wiring port.

[0011] Preferably, the shell comprises a plastic protective layer and an electromagnetic shielding material layer, and the electromagnetic shielding material layer is arranged between the plastic protective layers.

[0012] Preferably, an electromagnetic release, an arc extinguishing chamber, a mechanical locking handle mechanism and a thermal tripping mechanism are arranged inside the shell, the upper terminal is connected to a static contact sheet, the bottom of the static contact sheet is in contact with the static contact, the other end of the bimetallic strip is connected to an arc extinguishing electrode, and the plastic protective layer is connected to the arc extinguishing chamber.

[0013] Preferably, the electromagnetic release is arranged behind the arc extinguishing chamber, the mechanical locking handle mechanism is arranged behind the electromagnetic release, the mechanical locking handle mechanism cooperates with the triggering point of the electromagnetic release, the lower terminal is connected to the bimetallic strip through the connecting copper sheet, and the thermal release mechanism is located above the bimetallic strip.

[0014] The present invention also discloses a method for using the leakage disconnection protection system of a plastic case circuit breaker, which specifically comprises the following steps:

[0015] Step 1: Install the circuit breaker, align the groove with the installation part, press the clamp above the installation part, and press down the circuit breaker, so that the object to be installed enters the groove. When the clamp moves upward, the compression limit spring is deformed, so when the downward pressure stops, the clamp moves downward under the reaction force of the limit spring, so that it is clamped on the surface of the object to be installed, thereby fixing the circuit breaker.

[0016] When the first limit tooth contacts the second limit tooth, due to the presence of the first return spring, the first limit tooth can pass through the position of the second limit tooth. At this time, the first limit tooth comes to the bottom of the second limit tooth, and moves downward on the splint to rotate in the opposite direction. When the first limit tooth contacts the second limit tooth again, the second limit tooth limits the first limit tooth, and the first limit tooth cannot pass through the position of the second limit tooth, thereby limiting the position of the splint. At this time, the splint can tightly clamp the object to be installed, thereby making the installation more stable.

[0017] Step 3: After the circuit breaker is installed, make a connection, insert the wire end of the wire into the upper terminal through the wiring port, and use a tool to rotate the locking screw. The locking screw rotates and pushes the first rotating sleeve to move. The first rotating sleeve moves to push the pressure plate close to the wire end of the wire, thereby clamping the wire end. In addition, when the first rotating sleeve moves, the first rotating sleeve drives the L-shaped rod to move. The L-shaped rod moves so that the arc plate is close to the surface of the wire, thereby fixing and clamping the wire.

[0018] Step 4: When the circuit breaker needs to be disassembled, insert the key into the interior of the fixed shaft, and insert the head of the key into the spline groove, press down the circular slider to make the first bevel gear mesh with the second bevel gear, and turn the key. The rotation of the key drives the circular slider to rotate, and the rotation of the circular slider drives the connecting shaft to rotate. The rotation of the connecting shaft drives the first bevel gear to rotate, and the first bevel gear rotates and transmits it to the second bevel gear. The rotation of the second bevel gear drives the threaded rod to rotate. The rotation of the threaded rod causes the second swing rod to move toward the inside of the second rotating sleeve. After the second swing rod moves a certain distance, it drives the sliding sleeve to move. The movement of the sliding sleeve causes the first limiting tooth to disengage from the limiting position of the second limiting tooth, so that the splint can move freely up and down. At this time, the circuit breaker can be removed. After removal, turn the key again to restore the second swing rod to its original position, and pull out the key. After pulling out, the connecting shaft is reset under the action of the second reset spring, so that the first bevel gear is disengaged from the meshing with the second bevel gear.

[0019] Preferably, the purpose of turning the key again in step 4 is to allow the second limiting tooth to normally limit the first limiting tooth when the circuit breaker is installed next time, thereby ensuring that the circuit breaker can be normally locked and installed.

[0020] Beneficial Effects

[0021] The present invention provides a leakage disconnection protection system and method for a plastic case circuit breaker. Compared with the prior art, it has the following beneficial effects:

[0022] 1. The leakage disconnection protection system and method of the plastic case circuit breaker enable the sliding sleeve to move in the sliding rail through the cooperation between the through slot and the first swing arm, and limit the first limiting tooth through the second limiting tooth, so that when the circuit breaker is released, the position of the clamping plate can be locked, so that the clamping plate is clamped on the object to be fixed, thereby ensuring the stability of the circuit breaker after installation and preventing the circuit breaker from shaking.

[0023] 2. The leakage disconnection protection system and method of the plastic case circuit breaker, after the first limiting tooth is limited by the second limiting tooth, the clamping plate cannot move further, thereby locking the position of the circuit breaker. After locking, the circuit breaker can be protected from theft, and when the circuit breaker is disassembled, the lock can be released by a specially designed key and disassembly assembly, so that the circuit breaker can be disassembled, thereby improving the safety and anti-theft performance of the circuit breaker when in use.

[0024] 3. The leakage disconnection protection system and method of the plastic case circuit breaker can quickly install the circuit breaker by pressing down the clamping plate and generating a reaction force after the limit spring is compressed, thereby improving the convenience of installing the circuit breaker.

[0025] 4. The leakage disconnection protection system and method of the plastic case circuit breaker moves the L-shaped rod by rotating the locking screw, so that the arc plate is pressed against the surface of the wire. After the wires are connected, the stability of the joint is ensured, and the wires are prevented from shaking left and right to cause the connection head to break, thereby improving the reliability of the circuit breaker when in use.

[0026] 5. The leakage disconnection protection system and method of the plastic case circuit breaker can avoid the problem of mutual interference of the internal electromagnetic fields of each circuit breaker when the circuit breakers are spliced ​​together by setting up an electromagnetic shielding material layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the appearance of the present invention;

[0028] Figure 2 is a cross-sectional view of the present invention;

[0029] Figure 3 It is a rear view of the present invention;

[0030] Figure 4 Disassembling components for the present invention;

[0031] Figure 5 is a schematic diagram of a circular slider of the present invention;

[0032] Figure 6 It is a partial schematic diagram of the present invention;

[0033] Figure 7 It is an enlarged view of A of the present invention;

[0034] Figure 8 It is an enlarged view of B of the present invention;

[0035] Fig. 9 is a cross-sectional view of the outer shell of the present invention;

[0036] Fig.10 The figure is a flow chart of the method of the present invention.

[0037] In the figure: 1 housing, 2 groove, 3 clamping mechanism, 31 first fixed rod, 32 clamping plate, 33 limit spring, 34 guide rod, 35 through groove, 4 limit assembly, 41 fixed shaft, 42 second rotating sleeve, 43 first swing rod, 44 slide groove, 45 second swing rod, 46 slide sleeve, 47 first return spring, 48 first limit tooth, 49 slide rail, 410 second limit tooth, 5 disassembly assembly, 51 key, 52 circular slide groove, 53 circular slider, 54 connecting shaft, 55 first bevel gear, 56 second Fixed rod, 57 second return spring, 58 threaded rod, 59 second bevel gear, 510 spline groove, 6 wiring port, 7 upper wiring terminal, 8 lower wiring terminal, 9 locking screw, 10 first rotating sleeve, 11 pressure plate, 12 L-shaped rod, 13 arc plate, 14 electromagnetic release, 15 arc extinguishing chamber, 16 protection chamber, 17 mechanical locking handle mechanism, 18 static contact sheet, 19 static contact, 20 arc extinguishing electrode, 21 bimetallic sheet, 22 thermal release mechanism, 23 plastic protection layer, 24 electromagnetic shielding material layer. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0039] See also Figure 1-7The present invention provides a technical solution: a leakage disconnection protection system and method of a plastic housing circuit breaker comprises a housing 1, a groove 2 is provided on the back of the housing 1, a clamping mechanism 3 is arranged inside the groove 2, a protection chamber 16 is arranged inside the housing 1, a limit assembly 4 is arranged inside the protection chamber 16, the limit assembly 4 comprises a fixed shaft 41, the fixed shaft 41 is fixedly connected to the back of the inner wall of the protection chamber 16 and the side opposite to the front of the inner wall of the housing 1, a second rotating sleeve 42 is rotatably connected to the surface of the fixed shaft 41, a first swing rod 43 is fixedly connected to the right side of the second rotating sleeve 42, a sliding groove 44 is provided inside the second rotating sleeve 42, a second swing rod 45 is slidably connected to the inner surface of the first swing rod 43, a sliding sleeve 46 is slidably connected to the surface of the second swing rod 45, and the second swing rod 45 penetrates the sliding sleeve 46 and one end extending to the inside of the sliding sleeve 46 is fixedly connected with a first return spring 47, the other end of the first return spring 47 is fixedly connected to the inner wall of the sliding sleeve 46, the other end of the first return spring 47 is provided with a first limiting tooth 48, a slide rail 49 is provided on the front of the inner wall of the protection chamber 16, the inside of the slide rail 49 is provided with a second limiting tooth 410 matched with the first limiting tooth 48, and a disassembly component 5 is provided inside the fixed shaft 41, the sliding sleeve 46 can move in the slide rail 49 through the cooperation of the through groove 35 and the first swing rod 43, and the first limiting tooth 48 is limited by the second limiting tooth 410, so that when the circuit breaker is released, the position of the clamping plate 32 can be locked, so that the clamping plate 32 is clamped on the object to be fixed, thereby ensuring the stability of the circuit breaker after installation and preventing the circuit breaker from shaking;

[0040] The disassembly assembly 5 includes a circular slide groove 52 opened on the inner wall of the fixed shaft 41, a circular slider 53 is slidably connected to the inner surface of the circular slide groove 52, a connecting shaft 54 ​​is fixedly connected to the left side of the circular slider 53, a first bevel gear 55 is fixedly connected to the surface of the connecting shaft 54, a second fixing rod 56 is fixedly connected to the left side of the inner wall of the fixed shaft 41, the connecting shaft 54 ​​is slidably connected to the surface of the second fixing rod 56, a second return spring 57 is sleeved on the surface of the second fixing rod 56 located outside the connecting shaft 54, and the internal thread of the second rotating sleeve 42 is connected to the A threaded rod 58 is connected, and the threaded rod 58 passes through the second rotating sleeve 42 and extends to one end inside the fixed shaft 41, and is fixedly connected to the second bevel gear 59. After the first limiting tooth 48 is limited by the second limiting tooth 410, the clamping plate 32 cannot move further, thereby locking the position of the circuit breaker. After locking, the circuit breaker can be protected from theft, and when the circuit breaker is disassembled, the lock can be released through the specially designed key 51 and the disassembly component 5, so that the circuit breaker can be disassembled, thereby improving the safety and anti-theft performance of the circuit breaker when in use.

[0041] The surface of the threaded rod 58 located inside the slide groove 44 is threadedly connected to the right side of the second swing rod 45. The threaded rod 58 passes through the second swing rod 45 and extends to the inside of the second swing rod 45. A spline groove 510 is provided on the top of the circular slider 53, and the spline groove 510 cooperates with the key 51.

[0042] The clamping mechanism 3 includes two left and right first fixing rods 31, and the two first fixing rods 31 are fixedly connected to the top of the inner wall of the groove 2. The surfaces of the two first fixing rods 31 are slidably connected with clamping plates 32. The first fixing rod 31 is located between the top of the inner wall of the groove 2 and the surface of the clamping plate 32 on the opposite side of the top, and a limit spring 33 is sleeved. The top of the clamping plate 32 is fixedly connected with two left and right guide rods 34, and the guide rod 34 passes through the shell 1 and extends to the inside of the protective chamber 16. The guide rod 34 on the right side is provided with a through groove 35, and the first swing rod 43 is located inside the through groove 35. By pressing down the clamping plate 32 and through the reaction force generated by the compression of the limit spring 33, the circuit breaker can be quickly installed, thereby improving the convenience of installing the circuit breaker.

[0043] See also Figure 1 and 8 The top and bottom of the shell 1 are both provided with wiring ports 6, and the upper wiring terminal 7 and the lower wiring terminal 8 are clamped inside the shell 1. The upper wiring terminal 7 is located above the lower wiring terminal 8. The front of the upper wiring terminal 7 is threadedly connected with a locking screw 9, and the locking screw 9 penetrates the upper wiring terminal 7 and extends to one end of the upper wiring terminal 7 to be rotatably connected with a first rotating sleeve 10. The other end of the first rotating sleeve 10 is fixedly connected with a pressing plate 11, and the top of the first rotating sleeve 10 is fixedly connected with a pressing plate 11, and the pressing plate 11 is slidably connected to the groove opened in the inner wall of the shell 1, and the other end of the pressing plate 11 is fixedly connected with an arc plate 13, and the arc plate 13 can be moved into the wiring port 6, and the L-shaped rod 12 is moved by rotating the locking screw 9, so that the arc plate 13 is pressed against the surface of the wire, so that after the wire is connected, the stability of the joint is ensured, and the wire is prevented from shaking left and right to cause the wiring head to break, thereby improving the reliability of the circuit breaker when in use.

[0044] See also Fig. 9 The shell 1 includes a plastic protective layer 23 and an electromagnetic shielding material layer 24. The electromagnetic shielding material layer 24 is arranged between the plastic protective layers 23. By setting the electromagnetic shielding material layer 24, the electromagnetic shielding material layer 24 is only arranged in the inner walls on the left and right sides of the shell 1, so that after the circuit breakers are spliced ​​together, the problem of mutual interference between the internal electromagnetic fields of each circuit breaker when working can be avoided.

[0045] An electromagnetic release 14, an arc extinguishing chamber 15, a mechanical locking handle mechanism 17 and a thermal tripping mechanism 22 are arranged inside the housing 1. The upper terminal 7 is connected to a static contact sheet 18, the bottom of the static contact sheet 18 is in contact with a static contact 19, the other end of the bimetallic strip 21 is connected to an arc extinguishing electrode 20, and the plastic protective layer 23 is connected to the arc extinguishing chamber 15.

[0046] The electromagnetic release 14 is arranged behind the arc extinguishing chamber 15, and the mechanical locking handle mechanism 17 is arranged behind the electromagnetic release 14. The mechanical locking handle mechanism 17 cooperates with the triggering point of the electromagnetic release 14. The lower terminal 8 is connected to the bimetallic strip 21 through a connecting copper sheet, and the thermal release mechanism 22 is located above the bimetallic strip 21.

[0047] The present invention also discloses a method for using the leakage disconnection protection system of a plastic case circuit breaker, which specifically comprises the following steps:

[0048] Step 1: Install the circuit breaker, align the groove 2 with the installation part, press the clamping plate 32 above the installation part, and press the circuit breaker downward, so that the object to be installed enters the groove 2. When the clamping plate 32 moves upward, the compression limit spring 33 is deformed, so that when the downward pressure stops, the clamping plate 32 moves downward under the reaction force of the limit spring 33, so that it is clamped on the surface of the object to be installed, thereby fixing the circuit breaker.

[0049] Step 2: When the clamping plate 32 moves upward, the through slot 35 pushes the first swing rod 43 to swing around the fixed axis 41, and the first swing rod 43 swings, thereby driving the second rotating sleeve 42 to rotate, and the second rotating sleeve 42 rotates to drive the second swing rod 45 to swing, and the swing direction of the second swing rod 45 is opposite to that of the first swing rod 43. The swing of the second swing rod 45 causes the sliding sleeve 46 to slide in the sliding rail 49. When the first limiting tooth 48 contacts the second limiting tooth 410, due to the existence of the first reset spring 47, the first limiting tooth 48 can Through the position of the second limiting tooth 410, the first limiting tooth 48 comes to the bottom of the second limiting tooth 410 and moves downward on the clamping plate 32 to rotate in the opposite direction. When the first limiting tooth 48 contacts the second limiting tooth 410 again, the second limiting tooth 410 limits the first limiting tooth 48. The first limiting tooth 48 cannot pass through the position of the second limiting tooth 410, thereby limiting the position of the clamping plate 32. The position at this time allows the clamping plate 32 to tightly clamp the object to be installed, thereby making the installation more stable.

[0050] Step 3: After the circuit breaker is installed, it is connected. The wire end of the wire is inserted into the upper terminal 7 through the wiring port 6, and the locking screw 9 is rotated by a tool. The locking screw 9 rotates and pushes the first rotating sleeve 10 to move. The first rotating sleeve 10 moves to push the pressure plate 11 close to the wire end of the wire, thereby clamping the wire end. In addition, when the first rotating sleeve 10 moves, the first rotating sleeve 10 drives the L-shaped rod 12 to move. The L-shaped rod 12 moves so that the arc plate 13 is close to the surface of the wire, thereby fixing and clamping the wire.

[0051] Step 4: When the circuit breaker needs to be disassembled, insert the key 51 into the interior of the fixed shaft 41, and insert the head of the key 51 into the spline groove 510, press the circular slider 53 downward to make the first bevel gear 55 mesh with the second bevel gear 59, and turn the key 51. The rotation of the key 51 drives the circular slider 53 to rotate, and the rotation of the circular slider 53 drives the connecting shaft 54 ​​to rotate. The rotation of the connecting shaft 54 ​​drives the first bevel gear 55 to rotate, and the first bevel gear 55 rotates and transmits the power to the second bevel gear 59. The rotation of the second bevel gear 59 drives the threaded rod 58 to rotate, and the threaded rod 58 The rotation causes the second swing rod 45 to move toward the inside of the second rotating sleeve 42. After the second swing rod 45 moves a certain distance, it drives the sliding sleeve 46 to move. The movement of the sliding sleeve 46 causes the first limiting tooth 48 to disengage from the limiting position of the second limiting tooth 410, so that the clamping plate 32 can move up and down freely. At this time, the circuit breaker can be removed. After removal, the key 51 is rotated again to restore the second swing rod 45 to its original position, and the key 51 is pulled out. After being pulled out, the connecting shaft 54 ​​is reset under the action of the second reset spring 57, so that the first bevel gear 55 is disengaged from the second bevel gear 59.

[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0053] 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 leakage disconnection protection system for a plastic case circuit breaker, comprising a housing (1), wherein a groove (2) is provided on the back of the housing (1), and wherein: A clamping mechanism (3) is arranged inside the groove (2), a protection chamber (16) is arranged inside the housing (1), a limit assembly (4) is arranged inside the protection chamber (16), the limit assembly (4) comprises a fixed shaft (41), the fixed shaft (41) is fixedly connected to the back side of the inner wall of the protection chamber (16) and the side opposite to the front side of the inner wall of the housing (1), a second rotating sleeve (42) is rotatably connected to the surface of the fixed shaft (41), a first swing rod (43) is fixedly connected to the right side of the second rotating sleeve (42), a sliding groove (44) is provided inside the second rotating sleeve (42), and a second swing rod (43) is slidably connected to the inner surface of the first swing rod (43). A swing rod (45), the surface of the second swing rod (45) is slidably connected to a sliding sleeve (46), the second swing rod (45) penetrates the sliding sleeve (46) and extends to one end inside the sliding sleeve (46) and is fixedly connected to a first return spring (47), the other end of the first return spring (47) is fixedly connected to the inner wall of the sliding sleeve (46), the other end of the first return spring (47) is provided with a first limiting tooth (48), the front side of the inner wall of the protection chamber (16) is provided with a slide rail (49), the interior of the slide rail (49) is provided with a second limiting tooth (410) matched with the first limiting tooth (48), and the interior of the fixed shaft (41) is provided with a disassembly component (5); The disassembly assembly (5) comprises a circular slide groove (52) formed on the inner wall of the fixed shaft (41); a circular slider (53) is slidably connected to the inner surface of the circular slide groove (52); a connecting shaft (54) is fixedly connected to the left side of the circular slider (53); a first bevel gear (55) is fixedly connected to the surface of the connecting shaft (54); a second fixed rod (56) is fixedly connected to the left side of the inner wall of the fixed shaft (41); the connecting shaft (54) is slidably connected to the surface of the second fixed rod (56); a second return spring (57) is sleeved on the surface of the second fixed rod (56) located outside the connecting shaft (54); a threaded rod (58) is threadedly connected to the inner surface of the second rotating sleeve (42); and one end of the threaded rod (58) that penetrates the second rotating sleeve (42) and extends to the inside of the fixed shaft (41) is fixedly connected to the second bevel gear (59); The clamping mechanism (3) comprises two left and right first fixing rods (31), the two first fixing rods (31) are fixedly connected to the top of the inner wall of the groove (2), the surfaces of the two first fixing rods (31) are slidably connected with a clamping plate (32), a limit spring (33) is sleeved on the surface of the first fixing rod (31) located between the top of the inner wall of the groove (2) and the opposite side of the top of the clamping plate (32), the top of the clamping plate (32) is fixedly connected with two left and right guide rods (34), the guide rods (34) penetrate the housing (1) and extend to the inside of the protection chamber (16), the guide rod (34) located on the right side is provided with a through slot (35), and the first swing rod (43) is located inside the through slot (35).

2. A leakage disconnection protection system for a molded case circuit breaker according to claim 1, characterized in that: The surface of the threaded rod (58) located inside the slide groove (44) is threadedly connected to the right side of the second swing rod (45); the threaded rod (58) passes through the second swing rod (45) and extends into the interior of the second swing rod (45); a spline groove (510) is formed on the top of the circular slider (53); the spline groove (510) cooperates with the key (51).

3. A leakage disconnection protection system for a molded case circuit breaker according to claim 2, characterized in that: The top and bottom of the housing (1) are both provided with wiring ports (6), and an upper wiring terminal (7) and a lower wiring terminal (8) are clamped inside the housing (1), the upper wiring terminal (7) is located above the lower wiring terminal (8), and a locking screw (9) is threadedly connected to the front of the upper wiring terminal (7), and the locking screw (9) passes through the upper wiring terminal (7) and extends to one end inside the upper wiring terminal (7) and is rotatably connected to a first rotating sleeve (10), and the other end of the first rotating sleeve (10) is fixedly connected to a pressing plate (11).

4. A leakage disconnection protection system for a molded case circuit breaker according to claim 3, characterized in that: A pressure plate (11) is fixedly connected to the top of the first rotating sleeve (10), and the pressure plate (11) is slidably connected to a groove provided in the inner wall of the outer shell (1). The other end of the pressure plate (11) is fixedly connected to an arc plate (13), and the arc plate (13) can be moved into the wiring port (6).

5. A leakage disconnection protection system for a molded case circuit breaker according to claim 4, characterized in that: The housing (1) comprises a plastic protective layer (23) and an electromagnetic shielding material layer (24), wherein the electromagnetic shielding material layer (24) is arranged between the plastic protective layer (23).

6. A leakage disconnection protection system for a molded case circuit breaker according to claim 5, characterized in that: An electromagnetic release (14), an arc extinguishing chamber (15), a mechanical locking handle mechanism (17) and a thermal release mechanism (22) are arranged inside the housing (1); the upper terminal (7) is connected to a static contact sheet (18); the bottom of the static contact sheet (18) is in contact with a static contact (19); the lower terminal (8) is connected to a bimetallic sheet (21) via a connecting copper sheet; the thermal release mechanism (22) is located above the bimetallic sheet (21); the other end of the bimetallic sheet (21) is connected to an arc extinguishing electrode (20); and the plastic protective layer (23) is connected to the arc extinguishing chamber (15).

7. A leakage disconnection protection system for a molded case circuit breaker according to claim 6, characterized in that: The electromagnetic release (14) is arranged at the rear of the arc extinguishing chamber (15), the mechanical locking handle mechanism (17) is arranged at the rear of the electromagnetic release (14), and the mechanical locking handle mechanism (17) cooperates with the triggering point of the electromagnetic release (14).

8. The method for using the leakage disconnection protection system of a molded case circuit breaker according to claim 7, characterized in that: The specific steps include: Step 1: installing the circuit breaker, aligning the position of the groove (2) with the installation position, pressing the clamping plate (32) above the installation position, and pressing the circuit breaker downward, so that the object to be installed enters the groove (2), and when the clamping plate (32) moves upward, the compression limit spring (33) is deformed, so that when the downward pressure stops, the clamping plate (32) moves downward under the reaction force of the limit spring (33), so that it is clamped on the surface of the object to be installed, thereby fixing the circuit breaker; Step 2: When the clamping plate (32) moves upward, the through slot (35) pushes the first swing rod (43) to swing around the fixed axis (41). The first swing rod (43) swings, thereby driving the second rotating sleeve (42) to rotate. The second rotating sleeve (42) rotates and drives the second swing rod (45) to swing. The swing direction of the second swing rod (45) is opposite to that of the first swing rod (43). The swing of the second swing rod (45) causes the sliding sleeve (46) to slide in the sliding rail (49). When the first limiting tooth (48) contacts the second limiting tooth (410), due to the presence of the first return spring (47), the first limiting tooth (48) is released. 48) can pass through the position of the second limiting tooth (410), at which time the first limiting tooth (48) comes below the second limiting tooth (410) and moves downward on the clamping plate (32) so as to rotate in the opposite direction. When the first limiting tooth (48) contacts the second limiting tooth (410) again, the second limiting tooth (410) limits the first limiting tooth (48), and the first limiting tooth (48) cannot pass through the position of the second limiting tooth (410), thereby limiting the position of the clamping plate (32). At this time, the clamping plate (32) can tightly clamp the object to be installed, thereby making the installation more stable. Step 3: After the circuit breaker is installed, it is connected by inserting the wire end of the wire into the upper wire terminal (7) through the wiring port (6), and rotating the locking screw (9) by means of a tool. The locking screw (9) rotates and pushes the first rotating sleeve (10) to move. The first rotating sleeve (10) moves to push the pressure plate (11) close to the wire end of the wire, thereby clamping the wire end. In addition, while the first rotating sleeve (10) moves, the first rotating sleeve (10) drives the L-shaped rod (12) to move. The L-shaped rod (12) moves to make the arc plate (13) close to the surface of the wire, thereby fixing and clamping the wire. Step 4: When the circuit breaker needs to be disassembled, the key (51) is inserted into the interior of the fixed shaft (41), and the head of the key (51) is inserted into the spline groove (510), the circular slider (53) is pressed down so that the first bevel gear (55) is meshed with the second bevel gear (59), and the key (51) is turned. The rotation of the key (51) drives the circular slider (53) to rotate, and the rotation of the circular slider (53) drives the connecting shaft (54) to rotate. The rotation of the connecting shaft (54) drives the first bevel gear (55) to rotate, and the first bevel gear (55) rotates and transmits the power to the second bevel gear (59). The rotation of the second bevel gear (59) drives the threaded rod (58) to rotate, and the threaded rod The second swing rod (45) is rotated to move toward the inside of the second rotating sleeve (42). After the second swing rod (45) moves a certain distance, it drives the sliding sleeve (46) to move. The sliding sleeve (46) moves so that the first limiting tooth (48) is disengaged from the limiting position of the second limiting tooth (410), so that the clamping plate (32) can move up and down freely. At this time, the circuit breaker can be removed. After removal, the key (51) is rotated again to restore the second swing rod (45) to its original position, and the key (51) is pulled out. After being pulled out, the connecting shaft (54) is reset under the action of the second reset spring (57), so that the first bevel gear (55) is disengaged from the meshing with the second bevel gear (59).

9. The method for using the leakage disconnection protection system of a molded case circuit breaker according to claim 8, characterized in that: The purpose of turning the key (51) again in step 4 is to allow the second limiting tooth (410) to normally limit the first limiting tooth (48) when the circuit breaker is installed next time, thereby ensuring that the circuit breaker can be normally locked and installed.

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