Breaking mechanism, operating unit and measuring switch

Abstract

A breaking mechanism, an operating unit and a measuring switch, comprising: a housing formed by splicing a first housing and a second housing which cooperate with each other, an installation space being formed between the first housing and the second housing, and an installation hole being arranged between the first housing and the second housing and being perpendicular to the length direction of the housing; the breaking unit is arranged in the mounting space and comprises a moving contact assembly rotatably arranged in the mounting space and a static contact matched with the moving contact assembly; and the magnetic flux unit is mounted in the mounting hole. The breaking unit and the magnetic flux unit form a complete module, the accuracy of the position of the magnetic flux unit during installation is guaranteed, meanwhile, the position and structure for installing the magnetic flux additionally arranged in the middle cover are omitted, the independent installation holes have the limiting and guiding effects, the problem of magnetic flux motion deviation can be effectively solved, and the installation efficiency is improved. The stability and accuracy of the magnetic flux motion trail in the switching-on and switching-off processes are ensured, and the operation precision of the circuit breaker is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to low voltage electrical apparatus technical field, concretely relates to a breaking mechanism, operating unit and measuring switch. BACKGROUND

[0002] Moulded case circuit breaker is a kind of mechanical switch electrical apparatus that can be connected, carried and broken under the current of normal circuit condition, and can be connected, carried for a certain time and broken under the current of the specified abnormal circuit such as short circuit condition.When overcurrent fault occurs in any phase of three-phase main circuit, the current protection device of fault phase acts, and the magnetic flux conversion release drives operating mechanism to act, and circuit is disconnected. In the past, one operating structure and magnetic flux conversion release are generally used, which will lead to the problem of any phase, and the main circuit will be completely disconnected. At present, there are multiple single-phase circuit breakers assembled or single-phase circuit breaker modules installed in the same insulating shell on the market to control and protect the phase, but these schemes generally have unreasonable installation structure of magnetic flux conversion release, most of which need to set installation space in the insulating shell, and the magnetic flux is installed in the corresponding installation space, and is linked with operating mechanism through corresponding connecting rod mechanism, and the fixing mode is complex, so that the moulded case circuit breaker has problems such as complex structure, low installation efficiency, low reliability and inconvenience to miniaturization.

[0003] Furthermore, due to the installation position of magnetic flux, displacement of magnetic flux device occurs during operation, which affects the breaking and closing precision of circuit breaker, or the cooperation design of magnetic flux device and other mechanical parts is not good, which may lead to slow response speed and affect the rapid operation ability of circuit breaker, or due to the inaccurate cooperation between magnetic flux device and surrounding components, long-term use may cause mechanical wear and tear, and reduce the service life of the device. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies in the prior art, the utility model aims at providing a breaking mechanism, operating unit and moulded case circuit breaker.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A breaking mechanism, comprising:

[0007] A shell is composed of a first shell and a second shell matched with each other, and an installation space is formed between the first shell and the second shell, and an installation hole partially communicating or not communicating with the installation space is further arranged between the first shell and the second shell, and the installation hole and the installation space are sequentially arranged along the length direction of the shell.

[0008] A breaking unit is arranged in the installation space and comprises a movable contact assembly rotatably arranged in the installation space and a static contact matched with the movable contact assembly.

[0009] The magnetic flux unit is installed in the installation hole.

[0010] The installation hole comprises a first half hole arranged on the first shell and a second half hole arranged on the second shell, and the two half holes combine to form a complete installation hole.

[0011] The installation hole comprises a guide portion and an installation portion which are sequentially connected.

[0012] The guide portion is a circular hole, and a limiting member is arranged at the connection between the installation portion and the guide portion.

[0013] The magnetic flux unit comprises a magnetic yoke, a coil assembly arranged on the inner side of the magnetic yoke, an actuating portion arranged on the front side of the magnetic yoke in an extendable manner, and an elastic member sleeved on the actuating portion.

[0014] An operating unit comprises the above-mentioned breaking mechanism and an operating mechanism, the operating mechanism is provided with a reset member, the magnetic flux unit has a reset position and a tripping position, when the magnetic flux unit is in the tripping position, the actuating portion of the magnetic flux unit intersects with the reset member in the movement track, and when the operating mechanism performs a reclosing operation, the reset member can drive the magnetic flux unit to convert from the tripping position to the reset position.

[0015] The operating mechanism comprises:

[0016] a handle;

[0017] side plates symmetrically arranged on both sides of the breaking mechanism;

[0018] a U-shaped lever, the U-shaped end of which is connected with the side plates, and the U-shaped bottom of which is connected with the handle;

[0019] a connecting rod, which is symmetrically arranged on both sides of the breaking mechanism, is located on the inner side of the side plates, and forms a linkage with the lever;

[0020] springs, which are arranged in the middle of the operating mechanism, one end of which is connected with the lever, and the other end of which is connected with the connecting rod through a circular shaft;

[0021] a jump buckle and a lock buckle, which are arranged between the two side plates, and form a snap-fit with each other;

[0022] a reclosing buckle, which is arranged between the two side plates, and forms a snap-fit with the lock buckle.

[0023] The reset member comprises:

[0024] a rotating portion rotatably arranged on the side plate;

[0025] a limiting portion, which extends from the rotating portion towards the handle, and has a first limiting rod which forms a limiting fit with the side plate;

[0026] The driving part is extended from the rotating part to another direction, and can make the magnetic flux unit in compression state under external force, and the driving part is provided with a second limiting rod matched with the relocking buckle.

[0027] A measuring switch comprises a bottom shell, independent phase line channels are arranged in the bottom shell, and the operating unit is arranged in each phase line channel.

[0028] The magnetic flux unit is directly arranged in the breaking unit, so that the breaking unit and the magnetic flux unit form a complete module, the accuracy of the position of the magnetic flux unit during installation is ensured, the position and structure for installing the magnetic flux in the middle cover are omitted, the limiting and guiding effects of the independent mounting hole are achieved, the problem of magnetic flux movement deviation is effectively solved, the magnetic flux movement track during closing and opening is stable and accurate, and the precision of the circuit breaker operation is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a structural schematic view of the breaking mechanism of the utility model.

[0030] Figure 2 It is a sectional view of the mounting hole of the breaking mechanism of the utility model.

[0031] Figure 3 It is a front view of the first shell of the breaking mechanism of the utility model.

[0032] Figure 4 It is an internal schematic view of the breaking mechanism of the utility model.

[0033] Figure 5 It is a structural schematic view of the magnetic flux unit of the utility model.

[0034] Figure 6 It is a structural schematic view of the operating unit of the utility model.

[0035] Figure 7 It is a structural schematic view of the operating mechanism of the utility model.

[0036] Figure 8 It is a structural schematic view of the reset member of the utility model.

[0037] Figure 9 It is an internal schematic view of the measuring switch (the operating unit of one phase is hidden). DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0039] It should be noted that all directionality indications such as up, down, left, right, front, back, etc. in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture such as shown in the drawings, and if the specific posture changes, the directionality indications also change accordingly.

[0040] As shown in the drawings, the utility model discloses a breaking mechanism, adopts modular design, is a complete part, when assembling the measuring switch, only need to connect the breaking mechanism with the operating mechanism, can be installed in the phase line channel of the measuring switch. Modular design can realize quick installation and replacement, and each phase is provided with an independent operating mechanism, and the phase line operation can be carried out individually. Figure 1

[0041] The breaking mechanism comprises a shell and a breaking unit arranged in the shell, and a corresponding mounting hole 400 is additionally arranged at one end of the shell for mounting a magnetic flux unit 300, also known as a magnetic flux tripping device. The length direction of the shell is the horizontal plane. If the mounting hole is just located below the reclosing device, the opening direction of the mounting hole is vertical, that is, perpendicular to the horizontal plane. If the mounting hole is deviated from the reclosing device, the mounting hole can also be arranged obliquely.

[0042] As shown in the drawings, the utility model discloses a breaking mechanism, adopts modular design, is a complete part, when assembling the measuring switch, only need to connect the breaking mechanism with the operating mechanism, can be installed in the phase line channel of the measuring switch. Modular design can realize quick installation and replacement, and each phase is provided with an independent operating mechanism, and the phase line operation can be carried out individually. Figure 2

[0043] As shown in the drawings, the utility model discloses a breaking mechanism, adopts modular design, is a complete part, when assembling the measuring switch, only need to connect the breaking mechanism with the operating mechanism, can be installed in the phase line channel of the measuring switch. Modular design can realize quick installation and replacement, and each phase is provided with an independent operating mechanism, and the phase line operation can be carried out individually. Figure 4 ​​The breaking unit is arranged in the mounting space and includes a movable contact assembly 500 rotatably arranged in the mounting space and a static contact 600 matched with the movable contact assembly 500, the movable contact assembly 500 includes a rotating shaft and a movable contact, the movable contact is driven by the rotating shaft to move relative to the static contact, and the breaking unit is further provided with an arc extinguishing chamber 700 arranged in front of the movable and static contacts and a magnetic conducting block 800 arranged on both sides of the movable and static contacts.

[0044] As shown in Figure 5 The magnetic flux unit 300 is arranged in the mounting hole 400, and the magnetic flux unit 300 includes a magnetic yoke 310, a coil assembly 320 arranged in the inside of the magnetic yoke 310, an actuating part 330 arranged in front of the magnetic yoke 310 in a telescopic manner, the actuating part is arranged as a striking rod, and an elastic member 340 sleeved on the actuating part 330. The magnetic flux unit has an attraction position and a release position, when the magnetic flux unit receives a split excitation tripping signal, the actuating part 330 can be changed from the attraction position to the release position under the action of the elastic member 340, and the elastic member 340 is a spring.

[0045] The split excitation tripping signal received by the magnetic flux unit in the application can be output by a detection module inside a circuit breaker or a measuring switch, or can be sent by an upper computer, that is, after the magnetic flux unit receives the split excitation tripping signal, the actuating part overcomes the elastic force of the spring to act and complete the tripping action.

[0046] The mounting hole 400 includes a first half hole arranged on the first shell 100 and a second half hole arranged on the second shell 200, and the two half holes are combined to form a complete mounting hole 400, and the magnetic flux unit is fixed by splicing, which is convenient during installation.

[0047] As shown in Figure 3 The mounting hole 400 includes a guiding part 410 and a mounting part 420 which are sequentially communicated. The guiding part 410 is a circular hole, and the mounting part 420 is provided with a limiting member 430 at the connection position of the guiding part 410.

[0048] That is, the magnetic yoke is arranged in the mounting part, and the actuating part is movably arranged in the guiding part, the inner diameter of the guiding part is matched with the maximum outer diameter of the actuating part, so as to limit the moving direction of the actuating part and ensure that the actuating part always moves in a vertical direction and cannot deviate, and the limiting member 430 between the guiding part and the mounting part can be in the form of a protrusion, and the upper ends of the two sides of the magnetic yoke are upwardly protruded to form symmetrical limiting blocks 311, a gap matched with the limiting member is formed between the limiting blocks, the limiting blocks are clamped by the limiting member to form a limiting fit, and the stability of the position of the magnetic yoke in the mounting part is ensured.

[0049] As shown in Figure 6As shown, the utility model discloses an operating unit, it includes above-mentioned disconnecting mechanism 10 and operating mechanism 20, this operating mechanism and disconnecting mechanism fixed connection, realize modular design, and operating mechanism can be separately to disconnecting mechanism and separate control, namely through the connecting rod connection of pivot and operating mechanism, the operating mechanism 20 is equipped with reset piece 21, the magnetic flux unit has reset position and tripping position, when the magnetic flux unit is in tripping position, the actuating portion of magnetic flux unit and reset piece exist on the intersection of movement track, when operating mechanism carries out again buckle operation, can drive reset piece and make magnetic flux unit convert from tripping position to reset position.

[0050] As Figure 7 As shown, the operating mechanism comprises:

[0051] handle 22;

[0052] symmetrically arranged side plate 23 of disconnecting mechanism 10 both sides;

[0053] U-shaped lever 25, its U-shaped end is connected with side plate 23, and its U-shaped bottom is connected with handle 22;

[0054] connecting rod 24, symmetrically arranged in disconnecting mechanism 10 both sides, and located in the inside of side plate 23, and with lever 25 constitute linkage;

[0055] spring 29, two groups, and set in operating mechanism 20 middle, one end is connected with lever 25, and the other end is connected with connecting rod 24 through round shaft;

[0056] jump buckle 26 and lock buckle 27, set between two side plates 23, and the jump buckle 26 and lock buckle 27 constitute snap fit;

[0057] buckle 28 again, set between two side plates 23, and with lock buckle 27 constitute snap fit.

[0058] when the handle is applied with external force, the handle drives the lever, under the action of spring, pull the round shaft connected with the connecting rod, drive the connecting rod movement, in turn drive pivot and drive the moving contact movement connected on it, realize the contact or separation between moving contact and static contact.

[0059] As Figure 8 As shown, the reset piece 21 comprises:

[0060] rotatable setting on the rotating part 2100 of side plate 23;

[0061] limiting portion 2110, by rotating part 2100 extend towards handle direction, and have with the first limiting rod 2120 of side plate 23 constitute limiting cooperation;

[0062] The driving part 2130 is extended by the rotating part 2100 to another direction, and can make the magnetic flux unit 300 in a compressed state under the action of external force, and the driving part 2130 is provided with a second limiting rod 2140 matched with the relocking buckle 28.

[0063] Meanwhile, a tension spring is hung on the driving part, and the other end of the tension spring is connected with the hook 110 of the first shell, so that the tension spring can be quickly reset.

[0064] When closing, the operating mechanism accurately presses the magnetic flux unit to the contact through the reset part; when opening, the built-in spring quickly resets, and the design of the guide part ensures that the magnetic flux return is not deviated.

[0065] Initial state: the magnetic flux unit is in the reset state supported by the spring, the actuating part is tightly matched with the operating mechanism and the guide part, and there is no external force interference.

[0066] Closing process: when closing, the operating mechanism drives the reset part to act on the actuating part of the magnetic flux unit, so that the actuating part moves downward along the fixed track, and the main contact is closed by applying the acting force.

[0067] Opening process: when opening, the pressure is released, and the built-in spring quickly restores the magnetic flux unit to the initial position, so that the moving and static contacts are separated and quickly enter the waiting state.

[0068] As shown in Figure 9 The utility model also provides a kind of measurement switch, it includes bottom shell 30, the independent phase line passage 31 is equipped in the bottom shell 30, and each phase line passage 31 is equipped with above-mentioned operating unit. That is, three mutually independent mutually insulated accommodating cavities are formed in the width direction of base, three operating units are side by side arranged in three accommodating cavities, and three operating units are mutually independent, and each operating unit is arranged corresponding to each phase pole, and each operating unit can close or open to control the on or off of one phase line of external circuit. When the magnetic flux unit corresponding one phase line short-circuit, the magnetic flux unit can make the break mechanism of this phase open, i.e. single-phase operating mechanism is tripped. Single-phase operating mechanism and magnetic flux unit are provided with three, and each is corresponding to three phase lines of external circuit, to realize the independent break of three phase lines of external circuit.

[0069] The embodiments should not be regarded as limitation to the utility model, but any improvement based on the spirit of the utility model should be within the protection scope of the utility model.

Claims

1. A disconnecting mechanism characterized by: It comprises: The shell is composed of a first shell (100) and a second shell (200) that are spliced together, and an installation space is formed between the first shell (100) and the second shell (200), and an installation hole (400) that is partially or not connected with the installation space is further arranged between the first shell (100) and the second shell (200), and the installation hole (400) and the installation space are arranged in sequence along the length direction of the shell; The breaking unit is arranged in the installation space and comprises a movable contact assembly (500) rotatably arranged in the installation space and a static contact (600) matched with the movable contact assembly (500); The magnetic flux unit (300) is installed in the installation hole (400), and the actuating part thereof is exposed from the shell.

2. The opening and closing device according to claim 1, characterized in that: The installation hole (400) comprises a first half hole arranged on the first shell (100) and a second half hole arranged on the second shell (200), and the two holes are combined to form a complete installation hole (400).

3. The opening mechanism according to claim 1 or 2, characterized in that: The installation hole (400) comprises a guide part (410) and an installation part (420) that are connected in sequence.

4. The isolating mechanism according to claim 3, characterized in that: The guide part (410) is a circular hole, and a limiting piece (430) is arranged at the connection between the installation part (420) and the guide part (410).

5. The isolating mechanism according to claim 1, characterized in that: The magnetic flux unit (300) comprises a magnetic yoke (310), a coil assembly (320) arranged on the inner side of the magnetic yoke (310), an actuating part (330) arranged on the front side of the magnetic yoke (310) and an elastic piece (340) sleeved on the actuating part (330).

6. An operating unit characterized by comprising: It comprises the breaking mechanism (10) and the operating mechanism (20) of any one of claims 1 to 5, the operating mechanism (20) is provided with a reset member (21), the magnetic flux unit has a reset position and a tripping position, the actuating part of the magnetic flux unit intersects with the reset member in the movement track when the magnetic flux unit is in the tripping position, and the operating mechanism can drive the reset member to convert the magnetic flux unit from the tripping position to the reset position when the reclosing operation is performed.

7. The operating unit according to claim 6, characterized in that: The operating mechanism comprises: A handle (22); Side plates (23) symmetrically arranged on both sides of the breaking mechanism (10); A U-shaped lever (25) whose U-shaped end is connected with the side plates (23) and whose U-shaped bottom is connected with the handle (22); Connecting rods (24) symmetrically arranged on both sides of the breaking mechanism (10) and located on the inner side of the side plates (23) and in linkage cooperation with the lever (25); Springs (29) arranged in the middle of the operating mechanism (20), one end of each spring being connected with the lever (25) and the other end thereof being connected with the connecting rod (24) through a round shaft; A jump buckle (26) and a lock buckle (27) arranged between the two side plates (23) and in snap cooperation with each other; A reclosing buckle (28) arranged between the two side plates (23) and in snap cooperation with the lock buckle (27).

8. The operating unit according to claim 7, characterized in that: The reset member (21) comprises: A rotating part (2100) rotatably arranged on the side plate (23); The limiting part (2110) is extended from the rotating part (2100) to the handle direction and has a first limiting rod (2120) which forms a limiting cooperation with the side plate (23); The driving part (2130) is extended from the rotating part (2100) to another direction and can make the magnetic flux unit (300) in a compressed state under the action of external force, and the driving part (2130) is provided with a second limiting rod (2140) which forms a linkage cooperation with the re-buckle (28).

9. A metrology switch, characterized by: It comprises a bottom shell (30), the bottom shell (30) is provided with independent phase line channels (31), and each phase line channel (31) is provided with the operation unit in any one of the preceding claims 6-8.

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