An electromagnetic leakage circuit breaker

Abstract

An electromagnetic leakage circuit breaker. It solves the problem that the existing contact mechanism will affect the parts in the shell when it is disconnected. It includes a first shell, a middle shell, and a accommodating chamber; a first contact mechanism, the first contact mechanism includes a first moving contact piece and a first static contact piece; a first transmission mechanism, which is arranged in the first accommodating chamber; a zero-sequence mutual inductor, which is arranged in the first accommodating chamber; a control circuit board, the control circuit board is electrically connected to the zero-sequence mutual inductor; a first tripping module, which is arranged in the first accommodating chamber and is used to drive the first transmission mechanism to separate the first moving contact piece from the first static contact piece; a first driving member, which is electrically connected to the first tripping module and is used to control the action of the first tripping module; a first isolation plate, the first driving member and the control circuit board are both arranged above the first isolation plate, and the first contact mechanism is arranged below the first isolation plate. The utility model also has the advantages of simple structure, convenient assembly, reliable operation, and long service life.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to an electromagnetic leakage circuit breaker. Background Art

[0002] The leakage protector, also known as the leakage switch or leakage circuit breaker, is mainly used to protect against electric shock when leakage occurs in the equipment and is dangerous to people. It has overload and short circuit protection functions, and can be used to protect the line or motor from overload and short circuit. It can also be used as an infrequent switching start of the line under normal circumstances. The core component of the electromagnetic leakage protector is the electromagnetic release. When leakage occurs in the circuit, the current will generate a magnetic field, which will attract the iron core in the release, thereby triggering the mechanical mechanism to disconnect the power supply. The working principle of this protector is simple and direct, relying on the electromagnetic induction phenomenon.

[0003] The existing electromagnetic leakage protector control circuit board, contact mechanism and zero sequence mutual inductor are all placed in one chamber, so that the arc generated when the contact mechanism is disconnected can easily damage the control circuit board and the components installed thereon, affecting the service life of the product. The electromagnetic release has a relatively complex structure, which makes the product assembly troublesome. The product has many components, which affect each other, making the release insensitive and prone to failure. Utility Model Content

[0004] In order to solve the problem in the background technology that the existing contact mechanism will affect the components in the housing when disconnected, the utility model provides an electromagnetic leakage circuit breaker.

[0005] The technical solution of the utility model is: an electromagnetic leakage circuit breaker, comprising a shell, the shell comprising a first shell, a middle shell and a second shell, the middle shell is arranged between the first shell and the second shell, the first shell and the middle shell cooperate with each other to form a first accommodating cavity, and the middle shell and the second shell cooperate with each other to form a second accommodating cavity; and further comprising:

[0006] A first contact mechanism is arranged in the first accommodating cavity and close to the middle shell, and the first contact mechanism comprises a first moving contact piece and a first stationary contact piece;

[0007] A first transmission mechanism, disposed in the first accommodating cavity, for driving the first movable contact piece to move relative to the first stationary contact piece;

[0008] A zero-sequence mutual inductor is arranged in the first accommodating cavity;

[0009] A control circuit board, wherein the control circuit board is electrically connected to the zero-sequence transformer;

[0010] A first tripping module is disposed in the first accommodating chamber and is used to drive the first transmission mechanism to separate the first moving contact piece from the first stationary contact piece;

[0011] A first driving member, electrically connected to the first tripping module, and used to control the action of the first tripping module;

[0012] The first isolation plate, the first driving member and the control circuit board are both arranged above the first isolation plate, and the first contact mechanism is arranged below the first isolation plate.

[0013] As a further improvement of the utility model, it also includes a first partition plate, which divides the first accommodating chamber into a first accommodating chamber and a second accommodating chamber. The first contact mechanism is arranged in the first accommodating chamber, and the zero-sequence mutual inductor is arranged in the second accommodating chamber. The first partition plate is provided with an installation groove for the first static contact piece to pass through.

[0014] As a further improvement of the utility model, it also includes a second partition plate for separating the first trip module from the zero-sequence transformer.

[0015] As a further improvement of the present invention, the second partition plate is detachably connected to the middle shell, and the second partition plate is L-shaped.

[0016] As a further improvement of the utility model, it also includes a protective sleeve, and the protective sleeve is sleeved outside the first tripping module.

[0017] As a further improvement of the utility model, it also includes a first arc-striking piece, the first arc-striking piece and the first static contact piece cooperate with each other to form an arc-striking space, a separation cavity is provided on the middle shell, and the arc-striking space is connected to the separation cavity.

[0018] As a further improvement of the utility model, it also includes:

[0019] The arc extinguishing chamber is arranged in the second accommodating cavity;

[0020] A second contact mechanism is disposed in the second accommodating cavity;

[0021] The gas production plate is arranged on both sides of the second contact mechanism; the gas production plate is provided with a plurality of through holes.

[0022] As a further improvement of the utility model, it also includes a second arc-starting piece and a bimetallic piece, wherein the bimetallic piece is connected to the second arc-starting piece; a first bending portion is provided on the bimetallic piece, and the first bending portion is arranged horizontally.

[0023] As a further improvement of the utility model, it also includes a guide column, which is arranged on the middle shell and arranged toward the second accommodating cavity. The guide column is conical and is arranged through the first bending portion of the bimetallic strip.

[0024] As a further improvement of the utility model, it also includes a wiring terminal, on which a second bending portion is provided, and the second bending portion is horizontally arranged and fits with the first bending portion.

[0025] The beneficial effects of the utility model are that the first tripping module is driven to move by the first driving member, the structure is simple, and the driving is convenient and reliable; the first isolation plate is provided to separate the first tripping module, the control circuit board and the first contact mechanism, so as to prevent the arc of the first contact mechanism from affecting the control circuit board and thus affecting the life and stability of the product. The utility model also has the advantages of simple structure, convenient assembly, reliable action, long service life, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Attached Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0027] Attached Figure 2 The figure is a schematic diagram of the explosion structure of an embodiment of the utility model.

[0028] Attached Figure 3 The figure is a schematic diagram of the explosion structure of an embodiment of the utility model.

[0029] Attached Figure 4 It is a schematic diagram of the explosion structure in another direction of an embodiment of the utility model.

[0030] Attached Figure 5 It is a schematic diagram of the structure of the first accommodating cavity of the shell in the embodiment of the utility model.

[0031] Attached Figure 6 It is a schematic diagram of the structure of the second accommodating cavity of the shell in an embodiment of the utility model.

[0032] In the figure, 1, shell; 11, first shell; 12, middle shell; 121, first partition plate; 122, second partition plate; 13, second shell; 14, first accommodating chamber; 141, first accommodating chamber; 142, second accommodating chamber; 143, mounting groove; 144, arc-striking space; 145, partition chamber; 15, second accommodating chamber; 16, first arc-striking piece; 2, first contact mechanism; 21, first moving contact piece; 22, first static contact piece; 3, first transmission mechanism; 4, zero-sequence mutual inductor; 5, control circuit board; 6, first tripping module; 61, protective cover; 7, first driving member; 8, first isolation plate; 91, arc-extinguishing chamber; 92, second contact mechanism; 93, gas-producing plate; 931, through hole; 94, second arc-striking piece; 95, bimetallic strip; 951, first bending portion; 96, guide column; 97, terminal; 971, second bending portion. DETAILED DESCRIPTION

[0033] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0034] Depend on Figure 1 Combination Figure 2-6 As shown, an electromagnetic leakage circuit breaker includes a housing 1, wherein the housing 1 includes a first housing 11, a middle housing 12 and a second housing 13, wherein the middle housing 12 is disposed between the first housing 11 and the second housing 13, wherein the first housing 11 and the middle housing 12 cooperate with each other to form a first accommodating chamber 14, and wherein the middle housing 12 and the second housing 13 cooperate with each other to form a second accommodating chamber 15; and further comprising:

[0035] The first contact mechanism 2 is disposed in the first accommodating cavity 14 and close to the middle shell 12. The first contact mechanism 2 includes a first moving contact piece 21 and a first stationary contact piece 22.

[0036] The first transmission mechanism 3 is disposed in the first accommodating cavity 14 and is used to drive the first movable contact piece 21 to move relative to the first stationary contact piece 22;

[0037] The zero-sequence mutual inductor 4 is arranged in the first accommodating cavity 14;

[0038] A control circuit board 5, wherein the control circuit board 5 is electrically connected to the zero-sequence transformer 4;

[0039] The first tripping module 6 is disposed in the first accommodating chamber 14 and is used to drive the first transmission mechanism 3 to separate the first moving contact piece 21 from the first stationary contact piece 22;

[0040] A first driving member 7, electrically connected to the first tripping module 6, and used to control the action of the first tripping module 6;

[0041] The first isolation plate 8, the first driving member 7 and the control circuit board 5 are all arranged above the first isolation plate 8, and the first contact mechanism 2 is arranged below the first isolation plate 8. The beneficial effects of the utility model are that the first driving member drives the first tripping module to operate, the structure is simple, and the driving is convenient and reliable; the first isolation plate is provided to separate the first tripping module, the control circuit board and the first contact mechanism, so as to prevent the arc of the first contact mechanism from affecting the control circuit board and thus affecting the life and stability of the product. The utility model also has the advantages of simple structure, convenient assembly, reliable operation and long service life.

[0042] The utility model further comprises a first partition plate 121, wherein the first partition plate 121 divides the first accommodation chamber 14 into a first accommodation chamber 141 and a second accommodation chamber 142, wherein the first contact mechanism 2 is arranged in the first accommodation chamber 141, and the zero sequence mutual inductor 4 is arranged in the second accommodation chamber 142, and the first partition plate 121 is provided with a mounting groove 143 for the first static contact piece 22 to pass through. In this way, the first accommodation chamber and the second accommodation chamber are separated, and the arc is not easy to enter the second accommodation chamber to affect the zero sequence mutual inductor.

[0043] The utility model further includes a second partition plate 122, which is used to separate the first trip module 6 from the zero-sequence transformer 4. Specifically, the second partition plate 122 is detachably connected to the middle shell 12, and the second partition plate 122 is L-shaped. The detachable partition plate can adjust the size of the second cavity as needed, which is convenient for setting zero-sequence transformers and first trip devices of different volumes, so that the product has a wide range of adaptability.

[0044] The utility model further comprises a protective cover 61, which is sleeved outside the first trip module 6. The protective cover can be a plastic protective cover, which can be designed to be moisture-proof, salt spray-proof, and mildew-proof. Of course, it can also be designed as an EMC anti-electromagnetic compatible metal shell, which can ensure the product function is normal and reliable for product surge and pulse group tests, and avoid failure of the tripper.

[0045] The utility model further comprises a first arc striking piece 16, wherein the first arc striking piece 16 and the first static contact piece 22 cooperate with each other to form an arc striking space 144, and a separation cavity 145 is provided on the middle shell 12, wherein the arc striking space 144 is connected to the separation cavity 145. In this way, the arc generated by the N pole can be guided to the separation cavity, so as to facilitate rapid arc extinguishing.

[0046] Also includes:

[0047] The arc extinguishing chamber 91 is disposed in the second accommodating cavity 15;

[0048] The second contact mechanism 92 is disposed in the second accommodating cavity 15;

[0049] The gas production plate 93 is arranged on both sides of the second contact mechanism 92; the gas production plate 93 is provided with a plurality of through holes 931. The arrangement of the gas production plate and the through holes facilitates rapid arc striking and arc extinguishing in the arc extinguishing chamber.

[0050] The utility model also includes a second arc-initiating sheet 94 and a bimetallic sheet 95, wherein the bimetallic sheet 95 is connected to the second arc-initiating sheet 94; the bimetallic sheet 95 is provided with a first bending portion 951, and the first bending portion 951 is arranged horizontally. The utility model also includes a guide column 96, which is arranged on the middle shell 12 and is arranged toward the second accommodating cavity 15, and the guide column 96 is conical and is arranged through the first bending portion 951 of the bimetallic sheet 95. The utility model also includes a wiring terminal 97, wherein the wiring terminal 97 is provided with a second bending portion 971, and the second bending portion 971 is arranged horizontally and fits with the first bending portion 951. Such a structure facilitates the installation of the bimetallic sheet, has a simple structure, is convenient and reliable to assemble, and is convenient and reliable to fix.

[0051] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0052] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0053] Technical personnel should note: Although the utility model has been described according to the above specific implementation methods, the utility model concept is not limited to this utility model. Any modification using the utility model concept will be included in the scope of protection of the utility model patent right.

Claims

1. An electromagnetic leakage circuit breaker, comprising a housing (1), wherein the housing (1) comprises a first housing (11), a middle housing (12) and a second housing (13), wherein the middle housing (12) is arranged between the first housing (11) and the second housing (13), wherein the first housing (11) and the middle housing (12) cooperate with each other to form a first accommodating chamber (14), and wherein the middle housing (12) and the second housing (13) cooperate with each other to form a second accommodating chamber (15); characterized in that Also included: A first contact mechanism (2) is arranged in the first accommodating cavity (14) close to the middle shell (12), the first contact mechanism (2) comprising a first moving contact piece (21) and a first stationary contact piece (22); A first transmission mechanism (3) is disposed in the first accommodating cavity (14) and is used to drive the first movable contact piece (21) to move relative to the first stationary contact piece (22); A zero-sequence mutual inductor (4) is arranged in the first accommodating cavity (14); A control circuit board (5), wherein the control circuit board (5) is electrically connected to the zero-sequence transformer (4); A first tripping module (6) is disposed in the first accommodating chamber (14) and is used to drive the first transmission mechanism (3) to operate so that the first movable contact piece (21) is separated from the first stationary contact piece (22); A first driving member (7) is electrically connected to the first tripping module (6) and is used to control the action of the first tripping module (6); The first isolation plate (8), the first driving member (7) and the control circuit board (5) are both arranged above the first isolation plate (8), and the first contact mechanism (2) is arranged below the first isolation plate (8).

2. The electromagnetic leakage circuit breaker according to claim 1, characterized in that The invention also comprises a first partition plate (121), wherein the first partition plate (121) partitions the first accommodating chamber (14) into a first accommodating chamber (141) and a second accommodating chamber (142); the first contact mechanism (2) is arranged in the first accommodating chamber (141); the zero-sequence mutual inductor (4) is arranged in the second accommodating chamber (142); and the first partition plate (121) is provided with a mounting groove (143) for the first stationary contact piece (22) to pass through.

3. The electromagnetic leakage circuit breaker according to claim 1, characterized in that It also includes a second partition plate (122) for separating the first trip module (6) from the zero-sequence transformer (4).

4. The electromagnetic leakage circuit breaker according to claim 3, characterized in that The second partition plate (122) is detachably connected to the middle shell (12), and the second partition plate (122) is L-shaped.

5. The electromagnetic leakage circuit breaker according to claim 1, characterized in that It also comprises a protective sleeve (61), wherein the protective sleeve (61) is sleeved outside the first tripping module (6).

6. The electromagnetic leakage circuit breaker according to claim 1, characterized in that It also comprises a first arc-striking piece (16), wherein the first arc-striking piece (16) and the first stationary contact piece (22) cooperate with each other to form an arc-striking space (144), a partition cavity (145) is provided on the middle shell (12), and the arc-striking space (144) is in communication with the partition cavity (145).

7. The electromagnetic leakage circuit breaker according to claim 1, characterized in that Also includes: An arc extinguishing chamber (91) is arranged in the second accommodating cavity (15); A second contact mechanism (92) is disposed in the second accommodating cavity (15); The gas production plate (93) is arranged on both sides of the second contact mechanism (92); the gas production plate (93) is provided with a plurality of through holes (931).

8. The electromagnetic leakage circuit breaker according to claim 1, characterized in that It also comprises a second arc-starting sheet (94) and a bimetallic sheet (95), wherein the bimetallic sheet (95) is connected to the second arc-starting sheet (94); a first bending portion (951) is provided on the bimetallic sheet (95), and the first bending portion (951) is arranged horizontally.

9. The electromagnetic leakage circuit breaker according to claim 8, characterized in that It also includes a guide column (96) disposed on the middle shell (12) and facing the second accommodating cavity (15); the guide column (96) is conical and is disposed through the first bent portion (951) of the bimetallic strip (95).

10. The electromagnetic leakage circuit breaker according to claim 8, characterized in that It also comprises a connection terminal (97), wherein the connection terminal (97) is provided with a second bending portion (971), and the second bending portion (971) is arranged horizontally and fits with the first bending portion (951).

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