circuit breaker

Abstract

The application provides a circuit breaker, which belongs to the technical field of circuit breakers and comprises a shell, a partition plate body and a conductive plate. The shell comprises mutually matched upper and lower shells, and a containing cavity for containing internal elements of the circuit breaker is formed in the upper shell or the lower shell. The partition plate body is arranged in the containing cavity. The conductive plate is horizontally clamped between the back surface of the partition plate body and the cavity bottom of the containing cavity and has a flat structure. The circuit breaker has the partition plate body in the shell. The front surface of the partition plate body is used for arranging an arc extinguishing cover to form an arc extinguishing chamber. The back surface of the partition plate body and the inner wall of the shell are used for arranging the conductive plate. The conductive plate has a flat structure and is horizontally arranged on the back surface of the partition plate body. The size of the arc extinguishing chamber on the front surface of the partition plate body can be maximally increased, and the arc extinguishing effect is ensured. The conductive plate is separated from an L-level line through the partition plate body, so that the insulation of the N-level conductive plate and the L-level line is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit breaker, in particular to a circuit breaker. BACKGROUND

[0002] The circuit breaker is a kind of switch device that can carry and break the current under abnormal circuit conditions within a specified time.

[0003] In the circuit breaker, the conductive system has N-stage conductive plates and L-stage lines, wherein the two ends of the N-stage conductive plates are used for direct connection with input terminals and output terminals, and the L-stage lines are used for connection with electromagnetic tripping systems, double gold protection devices and other devices inside the circuit breaker. In order to isolate the N-stage conductive plates and the L-stage lines in the circuit breaker, the conductive system in the circuit breaker needs to be properly arranged. SUMMARY

[0004] Therefore, the present application provides a circuit breaker that uses a partition body to separate the N-stage conductive plates and the L-stage lines.

[0005] The circuit breaker provided by the present application comprises:

[0006] A housing comprising an upper housing and a lower housing that cooperate with each other, and the upper housing or the lower housing is provided with a receiving cavity for accommodating internal elements of the circuit breaker;

[0007] A partition body arranged in the receiving cavity;

[0008] A conductive plate in a flat structure, horizontally clamped between the back surface of the partition body and the cavity bottom of the receiving cavity.

[0009] As a preferred scheme, the back surface of the partition body has a receiving groove suitable for accommodating the conductive plate, one end of the receiving groove has an entrance for the conductive plate to enter, and the other end of the receiving groove has an exit for the conductive plate to exit.

[0010] As a preferred scheme, the receiving cavity is provided with an incoming line terminal chamber, and the partition body is provided with a first partition plate separating the incoming line terminal chamber from the front surface of the partition body.

[0011] As a preferred scheme, one end of the conductive plate is connected with the incoming line terminal, and the partition body is provided with a first partition plate separating the incoming line terminal from the front surface of the partition body.

[0012] As a preferred scheme, the receiving cavity is provided with an outgoing line terminal chamber, and the partition body is provided with a second partition plate separating the outgoing line terminal chamber from the front surface of the partition body.

[0013] As a preferred scheme, one end of the conductive plate is connected with the outgoing line terminal, and the partition body is provided with a second partition plate separating the outgoing line terminal from the front surface of the partition body.

[0014] As a preferred solution, the front face of the partition body has a chamber for arranging the arc extinguishing cover and a bimetal mounting chamber located at one side of the arc extinguishing cover chamber.

[0015] As a preferred solution, the front face of the partition body is shaped with a mounting protrusion and an adjusting screw mounting seat, the bimetallic strip of the bimetal protection device is sleeved at the mounting protrusion, and the adjusting screw mounting seat is located beside the mounting protrusion.

[0016] As a preferred solution, the inner bottom wall of the chamber of the front face of the partition body has a supporting rib for supporting the arc extinguishing cover.

[0017] The inner bottom wall of the chamber of the front face of the partition body also has a first positioning protrusion for positioning the arc extinguishing cover.

[0018] As a preferred solution, one end of the conductive plate is connected with the incoming terminal, and the other end of the conductive plate is connected with the outgoing terminal, and the conductive plate is integrally formed or the conductive plate and the incoming terminal and / or the outgoing terminal are integrally formed.

[0019] As a preferred solution, it further comprises an arc extinguishing cover arranged in the chamber of the front face of the partition body, and an exhaust passage for exhaust is formed between the outer wall of the arc extinguishing cover and the inner wall of the chamber.

[0020] As a preferred solution, the opening of the exhaust passage gradually increases from inside to outside.

[0021] As a preferred solution, one side of the front face of the partition body has an insertion structure for connecting with the magnetic yoke of the electromagnetic tripping system.

[0022] As a preferred solution, the insertion structure comprises a positioning groove with an inner wall surface for abutting the outer surface of the magnetic yoke.

[0023] A second positioning protrusion is arranged inside the positioning groove for abutting the inner surface of the magnetic yoke.

[0024] As a preferred solution, the edge of the second positioning protrusion for abutting the inner surface of the magnetic yoke is an arc-shaped edge.

[0025] As a preferred solution, it further comprises a magnetic yoke in a frame structure, which is connected to one side of the partition body through the insertion structure.

[0026] A coil is accommodated in the magnetic yoke, one end of the coil is electrically connected with the incoming terminal of the circuit breaker.

[0027] An armature is slidingly arranged in the coil.

[0028] The technical scheme of the present application has the following advantages:

[0029] 1. The circuit breaker provided by the present invention has a partition body inside the housing. The front side of the partition body is used to form an arc-extinguishing chamber after setting an arc-extinguishing cover. A conductive plate is set between the back side of the partition body and the inner wall of the housing. The conductive plate has a flat structure and is horizontally set on the back side of the partition body, which can maximize the size of the arc-extinguishing chamber on the front side of the partition body and ensure the arc-extinguishing effect. The conductive plate is on the back side of the partition body, and the partition body separates the conductive plate from the L-level line, thereby ensuring the insulation between the N-level conductive plate and the L-level line.

[0030] 2. The circuit breaker provided by the present invention has an input terminal connected to one end of a conductive plate on the back of the partition body and an output terminal connected to the other end. The conductive plate is integrally formed or the conductive plate and the input terminal and / or the output terminal are integrally formed. This arrangement can reduce the number of solder joints on the conductive plate and reduce the heat generated by the conductive plate during operation.

[0031] 3. The circuit breaker provided by the present invention has a supporting rib on the inner bottom wall of the cavity on the front side of the partition body for supporting the arc extinguishing cover, and also has a first positioning protrusion for positioning the arc extinguishing cover, thereby fixing the arc extinguishing cover in the cavity on the front side of the partition body.

[0032] 4. The circuit breaker provided by the present invention has a positioning groove and a second positioning protrusion disposed inside the positioning groove on one side of the front of the partition body. The inner wall surface of the positioning groove is used to abut against the outer surface of the magnetic yoke, and the second positioning protrusion is used to abut against the inner surface of the magnetic yoke, so that the magnetic yoke can be connected to the partition body by insertion.

[0033] 5. The circuit breaker provided by the present invention further includes an arc-extinguishing shroud, which is disposed in a cavity on the front side of the partition body. An exhaust channel is formed between the outer wall of the arc-extinguishing shroud and the inner wall of the cavity, through which the gas generated during the arc extinguishing process can be discharged. Attached Figure Description

[0034] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a three-dimensional structural diagram of a specific embodiment of the circuit breaker of the present invention.

[0036] Figure 2 for Figure 1 A three-dimensional structural diagram of the partition body and the electromagnetic tripping system.

[0037] Figure 3 for Figure 2 Schematic diagram of the back of the bulkhead body.

[0038] Figure 4 for Figure 3 Schematic diagram of the back of the bulkhead body.

[0039] Figure 5 Schematic diagram of the back of the bulkhead body.

[0040] Explanation of reference signs:

[0041] 1, bulkhead body; 2, arc extinguishing cover; 3, support rib; 4, first positioning protrusion; 5, positioning groove; 6, second positioning protrusion; 7, coil; 8, magnetic yoke; 9, accommodating groove; 10, exhaust passage; 11, conductive plate; 12, incoming wire terminal; 13, outgoing wire terminal; 14, armature; 15, housing; 16, incoming wire terminal chamber; 17, outgoing wire terminal chamber; 18, first bulkhead; 19, second bulkhead; 20, bimetal mounting chamber; 21, mounting protrusion; 22, adjusting screw mounting seat; 23, bimetallic strip. DETAILED DESCRIPTION

[0042] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0043] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] Furthermore, the technical features involved in the different embodiments of the application described below can be combined with each other as long as there is no conflict.

[0046] As shown in Figure 1 , the present embodiment provides a circuit breaker, as shown in Figure 1 , comprising a housing 15, a partition body 1 and a conductive plate 11.

[0047] The housing 15 has a top and bottom housing that cooperate with each other; the top or bottom housing is provided with a receiving cavity for accommodating internal components of the circuit breaker, which include an operating mechanism, a bimetallic protection device, an electromagnetic tripping system, an arc extinguishing system, etc. The partition body 1 is arranged in the receiving cavity; the conductive plate 11 is flat in structure and is horizontally clamped between the back of the partition body 1 and the bottom of the receiving cavity.

[0048] The front of the partition body 1 has a chamber for arranging an arc extinguishing cover 2, which forms an arc extinguishing chamber of the circuit breaker after the arc extinguishing cover 2 is arranged in the chamber. An electromagnetic tripping system is arranged on one side below the partition body 1, which includes a magnetic yoke 8, a coil 7 and an armature 14. The magnetic yoke 8 is a frame structure, the coil 7 is accommodated in the magnetic yoke 8, one end of the coil 7 is electrically connected to the line terminal 12 of the circuit breaker, and the armature 14 is slidingly inserted into the coil 7.

[0049] As shown in Figure 2 , a bimetal mounting chamber 20 is arranged on one side of the chamber of the arc extinguishing cover, and a mounting protrusion 21 is arranged in the bimetal mounting chamber. An adjusting screw mounting seat 22 is arranged beside the mounting protrusion 21; the bending part of the bimetallic strip 23 of the bimetallic protection device is sleeved on the position of the mounting protrusion.

[0050] As shown in Figure 2 , Figure 3 , the inner bottom wall of the chamber on the front of the partition body 1 has a support rib 3 for supporting the arc extinguishing cover 2, which is used to support the arc extinguishing cover 2; the inner bottom wall of the chamber on the front of the partition body 1 also has a first positioning protrusion 4 for positioning the arc extinguishing cover 2, which positions the arc extinguishing cover 2 and limits the arc extinguishing cover 2 within the chamber on the front of the partition body 1.

[0051] As shown in Figure 2 , Figure 3 , an exhaust passage 10 for exhaust is formed between the outer wall of the arc extinguishing cover 2 and the inner wall of the chamber, which is used to exhaust the gas generated during the arc extinguishing process of the circuit breaker. The opening of the exhaust passage 10 gradually increases from the inside to the outside, thereby improving the exhaust efficiency of the gas.

[0052] As shown in Figure 2 , Figure 3 , one side of the front face of the partition body 1 has an insertion structure for connecting with the magnetic yoke 8 of the electromagnetic tripping system. The insertion structure includes: a positioning groove 5 and a second positioning protrusion 6, the inner wall surface of the positioning groove 5 matches the shape of the outer surface of the magnetic yoke 8, the inner side wall is used to abut the outer surface of the magnetic yoke 8, so that the magnetic yoke 8 cannot move towards the direction of the arc extinguishing cover 2; the second positioning protrusion 6 has two, which are arranged in the interior of the positioning groove 5, and is used to abut the inner surface of the magnetic yoke 8, so that the magnetic yoke 8 cannot move away from the partition body 1, the edge of the second positioning protrusion 6 for abutting the inner surface of the magnetic yoke 8 is an arc-shaped edge, which reduces the impact on the magnetic yoke 8 and protects the magnetic yoke 8 to a certain extent.

[0053] As shown in Figure 4 , the back of the partition body 1 has a containing groove 9 suitable for containing the conductive plate 11, one end of the containing groove 9 has an entrance for the conductive plate 11 to enter, and the other end of the containing groove 9 has an exit for the conductive plate 11 to exit. The flat structure of the conductive plate 11 is horizontally clamped between the back of the partition body 1 and the inner wall of the shell 15.

[0054] As shown in Figure 5 , one end of the conductive plate 11 is connected with the incoming line terminal 12, and the other end of the conductive plate 11 is connected with the outgoing line terminal 13, the conductive plate 11 is integrally formed or the conductive plate 11 is integrally formed with the incoming line terminal 12 and / or the outgoing line terminal 13.

[0055] As shown in Figure 1 , the shell 15 is provided with an incoming line terminal chamber 16 in the containing cavity, and the partition body 1 is provided with a first partition 18 for separating the incoming line terminal chamber 16 from the front face of the partition body 1; wherein part of the side wall of the incoming line terminal chamber 16 is formed by the first partition 18, and the first partition 18 separates the incoming line terminal 12 from the front face of the partition body 1.

[0056] As shown in Figure 1 , the shell is provided with an outgoing line terminal chamber 17 in the containing cavity, and the partition body 1 is provided with a second partition 19 for separating the outgoing line terminal chamber 17 from the front face of the partition body 1; wherein the outgoing line terminal chamber 17 is a separate chamber, the outgoing line terminal 13 is connected with the conductive plate 11 after partially extending out of the outgoing line terminal chamber 17, and the second partition 19 separates the outgoing line terminal 13 from the front face of the partition body 1.

[0057] The circuit breaker is designed to have the N-stage conducting plate 11 arranged on the back surface of the partition body 1, and the L-stage line connection system arranged on the front surface of the partition body 1, so as to separate the N-stage and L-stage in the circuit breaker, and maximize the size of the arc extinguishing system and the electromagnetic tripping system.

[0058] Obviously, the above embodiments are merely exemplary and are not intended to limit the embodiments. Based on the above description, one of ordinary skill in the art can make other different forms of changes or modifications. All the embodiments are not required to be enumerated here. The obvious changes or modifications derived therefrom are still within the protection scope of the present application.

Claims

1. A circuit breaker, characterized in that, include: The housing (15) includes upper and lower housings that cooperate with each other. The upper or lower housing has a cavity for accommodating internal components of the circuit breaker. The cavity is provided with an incoming terminal chamber (16) and an outgoing terminal chamber (17). A partition body (1) is disposed in a receiving cavity. The partition body (1) has a first partition (18) and a second partition (19). The first partition (18) separates the incoming terminal chamber (16) from the front side of the partition body (1), and the second partition (19) separates the outgoing terminal chamber (17) from the front side of the partition body (1). The conductive plate (11) has a flat structure and is horizontally sandwiched between the back of the partition body and the bottom of the receiving cavity. One end of the conductive plate is connected to the inlet terminal and the other end of the conductive plate is connected to the outlet terminal.

2. The circuit breaker according to claim 1, characterized in that, The back of the partition body has a receiving groove (9) suitable for accommodating a conductive plate (11). One end of the receiving groove (9) has an inlet for the conductive plate (11) to pass through, and the other end of the receiving groove (9) has an outlet for the conductive plate (11) to pass out.

3. The circuit breaker according to claim 1, characterized in that, On the inner bottom wall of the chamber on the front side of the partition body (1), there are supporting ribs (3) for supporting the arc extinguishing cover (2); The inner bottom wall of the chamber on the front side of the partition body (1) also has a first positioning protrusion (4) for positioning the arc extinguishing cover (2).

4. The circuit breaker according to claim 1, characterized in that, The conductive plate is integrally formed, or the conductive plate and the incoming terminal and / or outgoing terminal are integrally formed.

5. The circuit breaker according to claim 1, characterized in that, Also includes: The front of the partition body has a chamber for arranging the arc extinguishing hood (2), and an exhaust passage (10) for exhaust is formed between the outer wall of the arc extinguishing hood (2) and the inner wall of the chamber.

6. The circuit breaker according to claim 5, characterized in that, The opening of the exhaust passage (10) gradually increases from the inside to the outside.

7. The circuit breaker according to any one of claims 1-6, characterized in that, The front side of the partition body (1) has an insertion structure for connecting with the magnetic yoke (8) of the electromagnetic tripping system.

8. The circuit breaker according to claim 7, characterized in that, The insertion structure includes: The positioning groove (5) has an inner wall surface for abutting the outer surface of the magnetic yoke (8); The second positioning protrusion (6) is disposed inside the positioning groove (5) and is used to abut against the inner surface of the magnetic yoke (8).

9. The circuit breaker according to claim 8, characterized in that, The edge of the second positioning protrusion (6) that abuts against the inner surface of the magnetic yoke (8) is an arc-shaped edge.

10. The circuit breaker according to claim 8, characterized in that, Also includes: The magnetic yoke (8) is a frame structure, and the magnetic yoke (8) is connected to one side of the partition body (1) through an insertion structure; A coil (7) is housed within the yoke (8), and one end of the coil (7) is electrically connected to the incoming terminal of the circuit breaker; The armature is slidably inserted into the coil (7).

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