An electric leakage circuit breaker mounting structure

Abstract

The utility model discloses a leakage circuit breaker mounting structure, and the circuit breaker shell is composed of base, middle seat and upper cover, and the middle seat and upper and lower cover cooperate to form L pole and N pole matrix, and the L pole matrix contains arc extinguishing chamber, L pole moving and static contact group and incoming and outgoing line terminal; the N pole matrix contains circuit board, N pole moving and static contact group and incoming and outgoing line terminal, and the middle seat is divided into main seat body and corner piece, the corner piece is corner structure, one end of the inserted board is inserted into the matching recess of the corner mouth of main seat body, the other end of the matching surface is abutted with the abutted mesa of main seat body, and the closed corner mouth outer edge is located between the base and the upper cover, and the L pole and N pole matrix are communicated through the corner mouth to form magnetic ring placement area, the magnetic ring is obliquely installed, and the L pole and N pole power supply wire are provided with the magnetic ring. The product solves the problem that the magnetic ring is difficult to install in the limited space due to the large volume.

Description

Technical Field

[0001] This utility model relates to the field of residual current circuit breaker technology, and in particular to an installation structure for a residual current circuit breaker. Background Technology

[0002] 1P+N residual current circuit breakers (RCCBs) are commonly used low-voltage electrical components and are widely used in household and industrial power distribution systems to achieve circuit switching control and residual current protection. Currently, 18mm wide 1P+N RCCBs on the market have a very compact internal structure due to width limitations. However, they integrate many components such as residual current trip units, magnetic rings, circuit boards, and contact assemblies. Among these, the magnetic rings are relatively large, making installation difficult and assembly inefficient within limited space. Utility Model Content

[0003] The purpose of this utility model is to overcome the defects of the prior art by providing an installation structure for a residual current circuit breaker, which solves the problem of difficult installation of the magnetic ring in a limited space due to its large size.

[0004] The technical solution of this utility model is as follows: An installation structure for a residual current circuit breaker includes a circuit breaker housing, a residual current trip unit, and a magnetic ring. The circuit breaker housing includes a base, a middle base, and a top cover. The middle base cooperates with the top cover and the base to form an L-pole base and an N-pole base, respectively. The L-pole base contains an arc-extinguishing chamber, an L-pole moving and stationary contact assembly, an L-pole inlet terminal, and an L-pole outlet terminal. The N-pole base contains a circuit board, an N-pole moving and stationary contact assembly, an N-pole inlet terminal, and an N-pole outlet terminal. The middle base includes a main body and a corner piece, which are separately configured. The corner piece includes a first component and a second component. The first component and the second component are connected to form a corner structure. One end of the corner piece... The device includes an insert plate and a mating surface on the other end. The main body has a corner opening with an open outer edge. The corner opening of the main body has a mating groove and a contact platform. The corner piece is fitted into the corner of the main body to close the outer edge of the corner opening. The insert plate of the corner piece is inserted into the mating groove of the main body, and the mating surface of the corner piece abuts against the contact platform of the main body. The corner piece is located between the base and the top cover. The L-pole base and the N-pole base are connected through the corner opening to form a magnetic ring placement area. The magnetic ring is installed at an angle in the magnetic ring placement area. The L-pole base has an L-pole power wire, and the N-pole base has an N-pole power wire. The L-pole power wire and the N-pole power wire pass through the magnetic ring.

[0005] Using the above technical solution, the middle base is not an integrated design. To facilitate better assembly of the magnetic ring, the middle base, specifically the area where the magnetic ring is placed, is designed as a main body and corner pieces. The N-pole portion is assembled on one side of the main body, and the base and main body are then assembled. Next, the L-pole portion and the magnetic ring are assembled on the other side of the main body. After assembly, the corner pieces are fastened to the main body, and the top cover is placed on top. The corner pieces and the main body are connected via insert plates, mating grooves, mating surfaces, and contact surfaces. This connection method is not only simple and convenient but also effectively ensures the stability of the connection between the corner pieces and the main body. This design re-plans the overall machine space, achieving a more rational placement area for the magnetic ring.

[0006] A further feature of this invention is that the magnetic ring is circular, and the inner wall of the first component has a recessed area that avoids the circumferential structure of the magnetic ring.

[0007] With the above-mentioned further design, the magnetic ring can be placed more smoothly in the magnetic ring placement area during installation, without worrying about interference between the circumferential structure of the magnetic ring and the inner wall of the first component, and the magnetic ring can be perfectly assembled.

[0008] A further feature of this invention is that the first component of the corner piece has an insertion port on the side corresponding to the upper cover and a retaining plate on the side corresponding to the base. The upper cover has an insertion block and the base has a retaining port. The insertion block is inserted into the insertion port and the retaining plate is inserted into the retaining port to form a positioning fit between the corner piece and the upper cover and the base.

[0009] With the above-described further design, the connection between the corner brackets and the top cover and base is more secure, effectively improving the stability and reliability of the entire installation structure. At the same time, this positioning and fitting design simplifies the installation process, making assembly more convenient and faster.

[0010] A further feature of this invention is that the main body has a limiting surface with a protruding post on it, and the second component of the corner piece has a locking hole on one side of the corresponding limiting surface, and the side of the second component abuts against the limiting surface, with the protruding post being inserted into the locking hole.

[0011] With the above-mentioned further design, the connection between the main body and the corner bracket is tighter, effectively preventing the corner bracket from wobbling on the main body and further improving the stability of the entire installation structure. In addition, the interlocking design of the protruding post and the locking hole not only enhances the strength of the connection, but also facilitates the positioning and installation of the corner bracket, making the entire installation process more precise and efficient.

[0012] A further feature of this invention is as follows: the corner piece is provided with a connecting part A at the connection between the first component and the second component, and the base and the top cover are respectively provided with connecting parts B and C. The connecting part A is a socket structure, and the connecting parts B and C are insert pin structures. The insert pins are provided with mounting holes. The insert pins are coaxially inserted into the sockets, and fasteners are inserted through the mounting holes and the sockets to connect and position the base, corner piece, and top cover.

[0013] With the above-described further design, the connection between the base, corner brackets, and top cover is more secure. Through the mating of the insertion holes and posts of connecting parts A and B, and the insertion and fixing of fasteners, a stable support structure is formed. This design not only improves the overall stability of the installation structure but also enhances the connection strength between components, making the entire residual current circuit breaker installation structure more reliable.

[0014] A further feature of this invention is that the L-electrode substrate has mutually spaced leakage trip wire receiving areas, a first arc-running vent, and a second arc-running vent. The bottom surface of the L-electrode substrate is provided with a first vent and a second vent. The first vent and the second vent are respectively connected to the first arc-running vent and the second arc-running vent. The first arc-running vent and the second arc-running vent are also connected through a vent hole. The leakage trip wire is located in the leakage trip wire receiving area.

[0015] By further configuring the above-mentioned features, this invention effectively diverts and discharges the high-temperature, high-pressure gas after it has passed through the arc-extinguishing chamber via two arc-running exhaust channels. Each channel has a corresponding exhaust port. When there is a pressure difference between the two spaces, the high-pressure gas in the higher-pressure exhaust channel flows through the vent to the lower-pressure exhaust channel for buffered convection, thus preventing the product casing from cracking and ensuring timely removal of the high-temperature gas. This achieves effective gas discharge from the arc-extinguishing chamber, preventing the circuit breaker's performance from deteriorating due to gas accumulation. Furthermore, the inclusion of a residual current device (RCD) conductor housing creates an independent space that can accommodate excessively long conductors, ensuring each conductor is positioned appropriately and preventing arcing and high-temperature gas from penetrating and damaging the conductors. This optimizes the wiring structure and improves the stability and safety of the circuit breaker.

[0016] A further feature of this invention is that the N-pole substrate has a magnetic ring wire receiving area and an arc generating area that are spaced apart from each other, and a third exhaust port is provided on the bottom surface of the N-pole substrate. The third exhaust port is connected to the arc generating area, and the magnetic ring wire is located in the magnetic ring wire receiving area.

[0017] By further modifying the above-mentioned design, this invention achieves a clear division of functional areas through the magnetic ring wire accommodating area and the arc generating area designed inside the N-pole substrate. The magnetic ring wire accommodating area is specifically designed to accommodate the magnetic ring wire, avoiding messy wire arrangement and optimizing the internal structure. At the same time, the third exhaust port is directly connected to the arc generating area, ensuring that the high-temperature and high-pressure gas generated during arc generation can be discharged in a timely manner, effectively reducing the internal pressure and avoiding problems caused by gas accumulation. Attached Figure Description

[0018] Figure 1 This is a structural diagram of a specific embodiment of the present utility model; Figure 2 This is a structural diagram of the middle seat in a specific embodiment of the present utility model; Figure 3 This is a structural diagram of the main body of a specific embodiment of the present utility model; Figure 4 A structural diagram of one side of the corner opening in a specific embodiment of this utility model; Figure 5 This is a structural diagram of the corner piece according to a specific embodiment of the present utility model; Figure 6 This is a structural diagram of the corner piece according to a specific embodiment of the present utility model; Figure 7 This is a structural diagram of one side of the L-pole of the middle seat in a specific embodiment of this utility model; Figure 8 for Figure 7 A magnified view of a portion of the image; Figure 9 This is a structural diagram of the upper cover of a specific embodiment of the present utility model; Figure 10 This is a structural diagram of one side of the N-pole of the central seat in a specific embodiment of this utility model; Figure 11 This is a cross-sectional view of a specific embodiment of the present utility model; Figure 12 This is a structural diagram of the base according to a specific embodiment of the present utility model. Detailed Implementation

[0019] The technical solutions in this embodiment 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.

[0020] like Figure 1-12As shown, the installation structure of a residual current circuit breaker according to this utility model includes a circuit breaker housing 1, a residual current trip unit 2, and a magnetic ring 3. The circuit breaker housing 1 includes a base 11, a middle seat 12, and a top cover 13. The middle seat 12 cooperates with the top cover 13 and the base 11 to form an L-pole base and an N-pole base, respectively. The L-pole base is provided with an arc-extinguishing chamber 14, an L-pole moving and stationary contact group 15, an L-pole incoming terminal 16, and an L-pole outgoing terminal 17. The N-pole base is provided with a circuit board 18, an N-pole moving and stationary contact group 19, an N-pole incoming terminal 20, and an N-pole outgoing terminal 21. The L-pole incoming terminal 16 and the L-pole outgoing terminal 17 are located at both ends of the L-pole base, and the N-pole incoming terminal 20 and the N-pole outgoing terminal 21 are located at both ends of the N-pole base. The terminals are of existing design, and the positions of the incoming and outgoing terminals can be interchanged. The L-pole substrate has mutually spaced leakage trip wire receiving areas 25, a first arc venting channel 26, and a second arc venting channel 27. The bottom surface of the L-pole substrate has a first vent 28 and a second vent 29, which are respectively connected to the first arc venting channel 26 and the second arc venting channel 27. The first arc venting channel 26 and the second arc venting channel 27 are also connected through a vent hole 30. The leakage trip wire 31 is disposed in the leakage trip wire receiving area 25. The N-pole substrate has mutually spaced magnetic ring wire receiving areas 32 and an arc generating area 33. The bottom surface of the N-pole substrate has a third vent 34, which is connected to the arc generating area 33. The magnetic ring wire 35 is disposed in the magnetic ring wire receiving area 32.

[0021] Specifically, the middle seat 12 includes a main seat body 121 and a corner piece 122, which are separately configured. The corner piece 122 includes a first component 1221 and a second component 1222. The first component 1221 and the second component 1222 are integrally connected to form a corner structure. One end of the corner piece 122 is provided with an insert plate 1223, and the other end is provided with a mating surface 1224. The main seat body 121 is provided with a corner opening 1211. The outer edge of the corner opening 1211 is open. The corner opening 1211 of the main seat body 121 is provided with a mating groove 1212 and an abutment surface 1213. The corner piece 122 is adapted to fit the corner of the main seat body 121 to close it. The outer edge of the corner joint 1211, the insertion plate 1223 of the corner piece 122 is inserted into the mating groove 1212 of the main body 121, and the mating surface 1224 of the corner piece 122 abuts against the contact surface 1213 of the main body 121. The corner piece 122 is located between the base 11 and the top cover 13. The L-pole base and the N-pole base are connected through the corner joint 1211 to form a magnetic ring placement area. The magnetic ring 3 is obliquely installed in the magnetic ring placement area. The L-pole base is provided with an L-pole power wire 22, and the N-pole base is provided with an N-pole power wire 23. The L-pole power wire 22 and the N-pole power wire 23 pass through the magnetic ring 3, and the power wires are connected to their respective terminals. The magnetic ring 3 is circular, and the inner wall of the first component 1221 has a recessed area 12211 to avoid the circumferential structure of the magnetic ring 3. The first component 1221 of the corner piece 122 has an insertion port 12212 on one side corresponding to the upper cover 13 and an integrated retaining plate 12213 on one side corresponding to the base 11. The upper cover 13 has an integral insertion block 131, and the base 11 has a retaining slot 111. The insertion block 131 is inserted into the insertion port 12212, and the retaining plate 12213 is inserted into the retaining slot 111, forming a positioning fit between the corner piece 122, the upper cover 13, and the base 11. The main body 121 has a limiting surface 1214, on which a protrusion 1215 is provided. The second component 1222 of the corner piece 122 has a retaining hole 12221 on one side corresponding to the limiting surface 1214, and the side of the second component 1222 abuts against the limiting surface 1214. The protrusion 1215 is engaged in the retaining hole 12221. The corner piece 122 has a connecting portion A1225 at the connection between the first component 1221 and the second component 1222. The base 11 and the top cover 13 are respectively provided with connecting portions B112 and C132. The connecting portion A1225 is a socket structure, and the connecting portions B112 and C132 are insert pin structures. The insert pins are provided with mounting holes 1121. The insert pins are coaxially inserted into the sockets. Fasteners are inserted through the mounting holes and the sockets to connect and position the base 11, corner piece 122, and top cover 13. The fasteners are screws, bolts, or pins.

[0022] The specific working principle of this utility model is as follows: The split design of the middle base 12 allows the magnetic ring 3 to be installed at an angle within the magnetic ring placement area. The recessed area 12211 of the corner piece 122 provides circumferential clearance space for the magnetic ring 3, ensuring that the magnetic ring 3 is not squeezed by the outer shell and guaranteeing the accuracy of magnetic field detection. The corner piece 122 achieves sealing and stability of the magnetic ring placement area through the mating groove 1212 of the insert plate 1223 and the mating surface 1224 and the contact surface 1213 of the main body 121, as well as the positioning structure with the upper cover 13 and the base 11, such as the insertion port 12212 and the insertion block 131, and the locking plate 12213 and the locking slot 111. Fasteners secure the base 11, corner piece 122, and upper cover 13 into a whole, ensuring that the relative positions of each component of the circuit breaker remain stable under opening and closing vibrations or external impacts, and guaranteeing the reliability of circuit continuity and leakage detection.

[0023] L-electrode arc treatment: The arc generated by the L-electrode is drawn into the arc-extinguishing chamber 14, which divides and cools the arc. The arc energy enters the first arc-running exhaust channel 26 and the second arc-running exhaust channel 27 respectively, and is discharged from the first exhaust port 28 and the second exhaust port 29. The two exhaust channels balance the air pressure through the vent 30 to improve the exhaust efficiency.

[0024] N-pole arc treatment: The arc generated by the N-pole is concentrated in the arc generation area 33 and discharged directly through the third exhaust port 34 to prevent the arc from spreading to components such as the circuit board 18.

[0025] In summary, this structure, through reasonable spatial layout, component coordination, and functional zoning, achieves efficient coordination of leakage protection, short circuit protection, and arc extinction, thereby improving the safety and stability of the circuit breaker.

[0026] It should be noted that in the description of this utility model, all directional indicators (such as up, down, forward, backward, etc.) are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0027] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a number" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "installation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A residual current circuit breaker installation structure, comprising a circuit breaker housing (1), a residual current trip unit (2), and a magnetic ring (3), wherein the circuit breaker housing (1) comprises a base (11), a middle seat (12), and a top cover (13), wherein the middle seat (12) cooperates with the top cover (13) and the base (11) to form an L-pole base and an N-pole base, wherein the L-pole base is provided with an arc-extinguishing chamber (14), an L-pole moving and stationary contact assembly (15), an L-pole incoming terminal (16), and an L-pole outgoing terminal (17), and the N-pole base is provided with a circuit board (18), an N-pole moving and stationary contact assembly (19), an N-pole incoming terminal (20), and an N-pole outgoing terminal (21), characterized in that: The middle seat (12) includes a main seat body (121) and a corner piece (122) that are separately set. The corner piece (122) includes a first component (1221) and a second component (1222). The first component (1221) and the second component (1222) are connected to form a corner structure. One end of the corner piece (122) is provided with a insert plate (1223) and the other end is provided with a mating surface (1224). The main seat body (121) is provided with a corner opening (1211). The outer edge of the corner opening (1211) is open. The corner opening (1211) of the main seat body (121) is provided with a mating groove (1212) and a contact surface (1213). The corner piece (122) is adapted to be installed on the corner of the main seat body (121). The corner piece (122) is closed at the outer edge of the corner opening (1211). The insert plate (1223) of the corner piece (122) is inserted into the mating groove (1212) of the main body (121). The mating surface (1224) of the corner piece (122) abuts against the contacting platform (1213) of the main body (121). The corner piece (122) is located between the base (11) and the top cover (13). The L pole base and the N pole base are connected through the corner opening (1211) to form a magnetic ring placement area. The magnetic ring (3) is installed at an angle in the magnetic ring placement area. The L pole base is provided with an L pole power wire (22), and the N pole base is provided with an N pole power wire (23). The L pole power wire (22) and the N pole power wire (23) pass through the magnetic ring (3).

2. The electrical leakage circuit breaker mounting structure of claim 1, wherein: The magnetic ring (3) is circular, and the inner wall of the first component (1221) has a recessed area (12211) that avoids the circumferential structure of the magnetic ring (3).

3. The electrical leakage circuit interrupter mounting structure of claim 1, wherein: The first component (1221) of the corner piece (122) has an insertion port (12212) on the side corresponding to the upper cover (13) and a retaining plate (12213) on the side corresponding to the base (11). The upper cover (13) has an insertion block (131) and the base (11) has a retaining slot (111). The insertion block (131) is inserted into the insertion port (12212) and the retaining plate (12213) is inserted into the retaining slot (111), forming a positioning fit between the corner piece (122), the upper cover (13), and the base (11).

4. The electrical leakage circuit breaker mounting structure according to claim 1 or 2 or 3, characterized by: The main body (121) has a limiting surface (1214) with a protruding post (1215) on the limiting surface (1214). The second component (1222) of the corner piece (122) has a locking hole (12221) on one side of the corresponding limiting surface (1214), and the side of the second component (1222) abuts against the limiting surface (1214). The protruding post (1215) is inserted into the locking hole (12221).

5. The electrical leakage circuit breaker mounting structure according to claim 1 or 2 or 3, characterized by: The corner piece (122) is provided with a connecting part A (1225) at the connection between the first component (1221) and the second component (1222). The base (11) and the top cover (13) are respectively provided with connecting parts B (112) and C (132). The connecting part A (1225) is a socket structure, and the connecting parts B (112) and C (132) are plug structures. The plug is provided with a mounting hole (1121). The plug is coaxially inserted into the socket. Fasteners are inserted through the mounting hole and the socket to connect and position the base (11), corner piece (122), and top cover (13).

6. The electrical leakage circuit breaker mounting structure according to claim 1 or 2 or 3, characterized by: The L-type base has a spaced-apart leakage trip wire receiving area (25), a first arc venting channel (26) and a second arc venting channel (27) inside. The bottom surface of the L-type base is provided with a first vent (28) and a second vent (29). The first vent (28) and the second vent (29) are respectively connected to the first arc venting channel (26) and the second arc venting channel (27). The first arc venting channel (26) and the second arc venting channel (27) are also connected through a vent hole (30). The leakage trip wire (31) is located in the leakage trip wire receiving area (25).

7. The electrical leakage circuit breaker mounting structure according to claim 1 or 2 or 3, characterized by: The N-pole substrate has a magnetic ring wire receiving area (32) and an arc generating area (33) formed inside it. A third exhaust port (34) is provided on the bottom surface of the N-pole substrate. The third exhaust port (34) is connected to the arc generating area (33). The magnetic ring wire (35) is located in the magnetic ring wire receiving area (32).

Images