CN214428586U - Residual current circuit breaker - Google Patents

Abstract

The utility model relates to the technical field of circuit breakers, in particular to an electric leakage circuit breaker, which comprises a shell, wherein the shell is provided with a mechanism spring, an L pole and N pole universal driving shaft, a moving contact, a static contact, an incoming line end, a leading-out terminal, a voltage release, an arc extinguishing device and a tripping device, and also comprises a test button, a connecting sheet, a test piece and a limiting block, wherein the test button is slidably embedded in a through hole groove on the outer wall of the shell; the connecting sheet is connected with the bottom of the test button and props against the inner wall of the shell; test piece one end be the flexure strip, with the connection piece butt, the other end of test piece is fixed on the circuit board, the test piece is used for providing the sensing the resilience force of connection piece, and put through experimental electric leakage return circuit when test button presses, the utility model discloses it is inconvenient to install test button among the prior art can be overcome to the problem of the extravagant cost in extravagant space.

Description

Residual current circuit breaker

Technical Field

The utility model relates to a technical field of circuit breaker, concretely relates to residual current circuit breaker.

Background

The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition within a prescribed time. The circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to the application range, the high-voltage and low-voltage boundary lines are relatively vague, and the circuit breakers above 3kV are generally called high-voltage electric appliances. The circuit breaker can be used for distributing electric energy, starting an asynchronous motor infrequently, protecting a power supply circuit, the motor and the like, automatically cutting off a circuit when faults such as serious overload, short circuit, undervoltage and the like occur, has the function equivalent to the combination of a fuse type switch, an over-under-heat relay and the like, and generally does not need to change parts after breaking fault current.

The leakage short-circuiting device is generally provided with a test button which can play a role of testing the on-off of a circuit, namely when the circuit is electrified, the leakage protection switch can trip when the test button is pressed, and if the circuit is not electrified, the leakage protection switch can not trip when the test button is pressed; on the other hand, the leakage fault can be simulated to prompt the leakage protection switch to trip, so as to judge whether the leakage protection switch can also act correctly.

Chinese patent application with publication number CN103606490A discloses a test button device of leakage circuit breaker, install the spacing ring on the device's the test button, the test button lower extreme supports the contact piece, test button and the inside slide motion of spacing ring at leakage circuit breaker, the slide lower extreme is provided with the separation blade that is used for blockking the spacing ring, thereby make test button be unlikely to the excessive bad contact piece of crushing of displacement, but the utility model discloses the human analysis discovers, this scheme is for the operation route of restriction test button, need set up the dedicated slide of test button in leakage circuit breaker inside, still need additionally install spacing ring and separation blade in addition, so occupied the inside great space of leakage circuit breaker, and be difficult for the installation, the cost is wasted.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the installation test button inconvenience among the prior art to the problem of the extravagant cost in extravagant space, thereby provide a residual current circuit breaker.

A leakage circuit breaker comprises a shell, wherein a mechanism spring, an L-pole and N-pole linkage shaft, a moving contact, a static contact, a wire inlet end, a wire outlet end, a voltage release, an arc extinguishing device and a tripping device are arranged on the shell, and the leakage circuit breaker also comprises a test button, a connecting sheet, a test piece and a limiting block, wherein the test button is slidably embedded in a through hole groove on the outer wall of the shell; the connecting sheet is connected with the bottom of the test button and props against the inner wall of the shell; test piece one end is the flexure strip, with the connection piece butt, the other end of test piece is fixed on the circuit board, the test piece is used for providing the sensing the resilience force of connection piece, and the test button switches on experimental electric leakage return circuit when pressing.

Furthermore, a guide block is arranged in the shell, and the side wall of the connecting sheet is in sliding fit with the side wall of the guide block.

Furthermore, a slot is formed in the circuit board, a draw hook is arranged at one end, close to the circuit board, of the test piece, and the draw hook is inserted into the slot and hooks the circuit board.

Furthermore, a static contact is connected to the circuit board through a wire, a connecting column is arranged on the shell, the static contact is connected with the connecting column, and the static contact and the circuit board form a loop.

Furthermore, the static contact is annular, the static contact is sleeved on the outer wall of the connecting column, and a through groove is formed in the static contact along the axial direction of the static contact.

Furthermore, a fixed contact is connected to the tripping device, a clamping block is arranged on the shell, a clamping groove is arranged on the fixed contact, and the clamping block is clamped with the clamping groove.

Further, be equipped with the mounting groove on the casing, be equipped with the run-on angle in the casing, the one end at run-on angle inserts in the mounting groove, the run-on angle inserts the outer wall and the mounting groove inner wall of the part of mounting groove are pasted.

Furthermore, a positioning block is arranged in the mounting groove, a positioning groove is formed in the part, inserted into the mounting groove, of the arc striking angle, the positioning block is inserted into the positioning groove, and the outer wall of the positioning block is attached to the inner wall of the positioning groove.

Furthermore, a threading hole is formed in the shell, a power line is arranged in the threading hole, one end of the power line is connected with the circuit board, and the other end of the power line is connected with an arc striking plate.

Further, the tripping device comprises a tripping rod, and the movable iron core of the voltage release can abut against the tripping rod and rotate the tripping rod.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a leakage circuit breaker, which comprises a shell, wherein the shell is provided with a mechanism spring, an L pole and N pole universal driving shaft, a moving contact, a static contact, a wire inlet end, a wire outlet end, a voltage release, an arc extinguishing device and a tripping device, and also comprises a test button, a connecting sheet, a test piece and a limiting block, and the test button is slidably embedded in a through hole groove on the outer wall of the shell; the connecting sheet is connected with the bottom of the test button and props against the inner wall of the shell; test piece one end is the flexure strip, with the connection piece butt, the other end of test piece is fixed on the circuit board, the test piece is used for providing the sensing the resilience force of connection piece, and the test button switches on experimental electric leakage return circuit when pressing. When operating personnel need simulate the leakage test, press test button downwards, test button slides along the through-hole groove, test button drives the connection piece downstream, connection piece extrusion test piece, the test piece produces deformation, the test piece is connected with the circuit board, the circuit board switches on the electric leakage return circuit when the test piece deformation, thereby simulate the leakage test, because test piece one end is the flexure strip, operating personnel loosens test button after the test piece reconversion, thereby make test button reset, in addition, be located the stopper on the test button moving direction and can support test button, the biggest displacement distance of restriction test button, prevent that the distance that test button removed is too big and crush the test piece.

2. The utility model provides a pair of residual current circuit breaker, be equipped with the guide block in the casing, the connection piece lateral wall with guide block lateral wall sliding fit. The setting of guide block is spacing to the left and right sides of connection piece, and the connection piece is connected with the button, so the button can slide more smoothly.

3. The utility model provides a pair of residual current circuit breaker, be equipped with the slot on the circuit board, the test piece is close to the one end of circuit board is equipped with the drag hook, the drag hook inserts in the slot and catch on the circuit board. The one end design of test piece is the drag hook, and the slot on the circuit board is inserted to the drag hook to certain initial pressure has been formed, lets not welded test piece not fall, and final test piece carries out soldering tin with the circuit board and is connected, thereby makes being connected of test piece and circuit board more convenient.

4. The utility model provides a pair of leakage circuit breaker, be connected with the static contact through the wire on the circuit board, be equipped with the spliced pole on the casing, the static contact with the spliced pole is connected, the static contact with the circuit board forms the return circuit. The static contact is connected with the connecting column, and is more convenient.

5. The utility model provides a pair of leakage circuit breaker, the static contact is the ring form, the static contact overlap in the spliced pole outer wall, the static contact is equipped with logical groove along self axial. The annular static contact cover of circle is at the junction outer wall, and it is more convenient to connect, and is also more firm simultaneously, and the setting that leads to the groove in addition makes the static contact have certain deformation volume, links to each other with the spliced pole or lift more convenient from the spliced pole.

6. The utility model provides a pair of leakage circuit breaker, the last static contact that is connected with of trip gear, be equipped with the fixture block on the casing, be equipped with the draw-in groove on the static contact, fixture block and draw-in groove joint. The static contact passes through the draw-in groove and links to each other with the casing with the cooperation of fixture block, and is more firm difficult for droing, and the design of draw-in groove still helps improving the utilization ratio of copper spare material in addition.

7. The utility model provides a pair of leakage circuit breaker, be equipped with the mounting groove on the casing, be equipped with the run-on angle in the casing, the one end at run-on angle is inserted in the mounting groove, the run-on angle inserts the outer wall and the mounting groove inner wall of the part of mounting groove paste mutually. The arc striking angle is inserted into the mounting groove, so that a welding process can be omitted, the assembly efficiency is improved, and the labor cost is saved.

8. The utility model provides a pair of leakage circuit breaker, be equipped with the locating piece in the mounting groove, the run-on angle inserts be equipped with the constant head tank in the part of mounting groove, the locating piece inserts in the constant head tank, the locating piece outer wall with the constant head tank inner wall pastes mutually. The design of locating piece and constant head tank makes the area of contact increase between run-on angle and the mounting groove to increased the frictional force between run-on angle and the mounting groove, made the run-on angle be difficult for coming off by oneself in the mounting groove, it is more firm to connect.

9. The utility model provides a pair of leakage circuit breaker, be equipped with the through wires hole on the casing, be equipped with the power cord in the through wires hole, power cord one end with the circuit board is connected, is connected with the run-on plate on the other end. The power cord passes through from the threading hole, has realized the function of inlet wire down, and the reason lies in when the inlet wire down, draws the live wire power of electronic circuit board to the inlet wire end, and the power of electronic circuit board also loses the electricity after the circuit breaker outage, so the coil on the trip gear can not burnt down to the inlet wire at this moment.

10. The utility model provides a pair of leakage circuit breaker, trip gear includes the trip bar, voltage release's the iron core that moves can support the trip bar makes the trip bar is rotatory. When the tripping is started, the voltage tripper generates a magnetic field under the clamping of voltage, the static iron core is magnetized, the movable iron core moves towards the direction close to the tripping rod, so that the movable iron core supports against the tripping rod and pushes the tripping rod to rotate, and the tripping device is promoted to complete the tripping process.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of the overall structure of a residual current circuit breaker according to the present invention;

fig. 2 is a schematic view of a partial structure of a residual current circuit breaker according to the present invention;

fig. 3 is a schematic structural view of a stationary contact of the leakage circuit breaker of the present invention;

fig. 4 is a schematic structural view of an arc striking angle of the residual current circuit breaker of the present invention;

fig. 5 is the utility model discloses a structural schematic diagram of the through wires hole of electric leakage circuit breaker.

Description of reference numerals: 1. a test button; 2. connecting sheets; 3. a test piece; 4. a limiting block; 5. a guide block; 6. a slot; 7. pulling a hook; 8. a static contact piece; 9. connecting columns; 10. a through groove; 11. static contact; 12. a clamping block; 13. a card slot; 14. mounting grooves; 15. an arc striking angle; 16. positioning blocks; 17. positioning a groove; 18. threading holes; 19. a reinforcing plate; 20. a trip bar; 21. a voltage release.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

Referring to fig. 1-5, the embodiment of the application provides an electric leakage circuit breaker, which comprises a shell, wherein a mechanism spring, an L-pole and N-pole linkage shaft, a moving contact, a static contact 11, a wire inlet end, a wire outlet end, a voltage release 2, an arc extinguishing device, a release device, a test button 1, a connecting sheet 2, a test piece 3 and a limiting block 4 are arranged on the shell, and the test button 1 is slidably embedded in a through hole groove on the outer wall of the shell; the connecting piece 2 is connected with the bottom of the test button 1 and props against the inner wall of the shell; 3 one end of test piece is the flexure strip, with connection piece 2 butt, the other end of test piece 3 is fixed on the circuit board, test piece 3 is used for providing the direction the resilience force of connection piece 2, and switch on test electric leakage return circuit when test button 1 is pressed.

When operating personnel need carry out simulation earth leakage test, press test button 1 downwards, test button 1 slides along the through-hole groove, test button 1 drives connection piece 2 and moves down, 2 extrusion test pieces 3 of connection piece, test piece 3 produces deformation, test piece 3 is connected with the circuit board, the circuit board switches on electric leakage return circuit when test piece 3 deformation, thereby simulation earth leakage test, because 3 one end of test piece are the flexure strip, operating personnel loosens 3 reconversion of test piece behind test button 1, thereby make test button 1 reset, in addition, be located the stopper 4 on 1 moving direction of test button and can support test button 1, the maximum displacement distance of restriction test button 1, prevent that the distance that test button 1 removed is too big and crush test piece 3.

The connection has reinforcing plate 19 between test button 1 and connection piece 2, and reinforcing plate 19 is the triangle form, and reinforcing plate 19 top is connected with test button 1 bottom, and the 19 lateral walls of reinforcing plate are connected with connection piece 2 lateral walls, and the setting up of reinforcing plate 19 makes connection piece 2 and test button 1 between be connected more firmly.

Be equipped with guide block 5 in the casing, guide block 5 has two, and the left and right sides of connection piece 2 respectively has a guide block 5, and connection piece 2 lateral wall and guide block 5 sliding fit.

The circuit board is provided with a slot 6, one end of the test piece 3 close to the circuit board is designed into a drag hook 7, and the drag hook 7 is inserted into the slot 6 and hooks the circuit board. The circuit board is connected with a static contact 8 through a PVC wire, the static contact 8 is in a ring shape, a through groove 10 is formed in the side wall of the static contact 8 along the axial direction of the static contact, a connecting column 9 is installed on the shell, the static contact 8 is sleeved on the outer wall of the connecting column 9, and the inner wall of the static contact 8 is attached to the outer wall of the connecting column 9.

The tripping device is connected with a static contact 11, a clamping block 12 is installed on the shell, a clamping groove 13 is formed in the static contact 11, and the clamping block 12 is clamped with the clamping groove 13.

Be provided with mounting groove 14 on the casing, be provided with locating piece 16 in the mounting groove 14, install run-on angle 15 in the casing, be provided with constant head tank 17 on the run-on angle 15, run-on angle 15 inserts in mounting groove 14, locating piece 16 and constant head tank 17 cooperation joint have so removed welding process from for run-on angle 15 tightly blocks in mounting groove 14, can not drop easily.

Under some specific environment, the user can require that the electric leakage circuit breaker can go in and out from down, and conventional electric leakage circuit breaker often goes in and out from down, therefore opens threaded hole 18 on the casing, has worn the power cord in the threaded hole 18, and power cord one end is connected with the circuit board, is connected with the run-on plate on the other end.

The trip device comprises a trip bar 20 against which a movable core of a voltage trip 21 can abut and rotate the trip bar 20, the trip bar 20 being mounted inside the housing by means of a torsion spring.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (10)

1. The utility model provides a residual current circuit breaker, includes the casing, is equipped with mechanism spring, the utmost point and the N utmost point universal driving shaft of L, moving contact, static contact (11), inlet wire end, outlet terminal, voltage release, arc control device, trip gear on the casing, its characterized in that still includes:

the test button (1) is slidably embedded in a through hole groove on the outer wall of the shell;

the connecting piece (2) is connected with the bottom of the test button (1) and props against the inner wall of the shell;

the test piece (3) is provided with one end which is an elastic piece and is abutted against the connecting piece (2), the other end of the test piece (3) is fixed on the circuit board, and the test piece (3) is used for providing resilience force pointing to the connecting piece (2) and is connected with a test leakage loop when the test button (1) is pressed down;

and the limiting block (4) is positioned in the moving direction of the test button (1) to the shell and is used for limiting the maximum moving distance of the test button (1).

2. A residual current circuit breaker as claimed in claim 1, characterized in that a guide block (5) is provided in the housing, the side wall of the connection piece (2) being in sliding engagement with the side wall of the guide block (5).

3. A residual current circuit breaker according to claim 1, characterized in that the circuit board is provided with a slot (6), and a pull hook (7) is provided at one end of the test strip (3) close to the circuit board, and the pull hook (7) is inserted into the slot (6) and hooks the circuit board.

4. A residual current circuit breaker according to claim 1, characterized in that a static contact (8) is connected to the circuit board through a wire, a connection column (9) is arranged on the housing, the static contact (8) is connected to the connection column (9), and the static contact (8) and the circuit board form a loop.

5. A residual current circuit breaker according to claim 4, characterized in that said static contact (8) is circular ring-shaped, said static contact (8) is sleeved on the outer wall of said connection column (9), said static contact (8) is provided with a through groove (10) along its own axial direction.

6. The residual current circuit breaker according to claim 1, wherein the tripping device is connected with a static contact (11), the housing is provided with a latch (12), the static contact (11) is provided with a latch (13), and the latch (12) is latched with the latch (13).

7. An earth leakage breaker according to claim 1, characterized in that the housing is provided with a mounting groove (14), an arc striking angle (15) is arranged in the housing, one end of the arc striking angle (15) is inserted into the mounting groove (14), and the outer wall of the portion of the arc striking angle (15) inserted into the mounting groove (14) is attached to the inner wall of the mounting groove (14).

8. An electrical leakage breaker according to claim 7, wherein a positioning block (16) is disposed in the mounting groove (14), a positioning groove (17) is disposed on a portion of the arc striking angle (15) inserted into the mounting groove (14), the positioning block (16) is inserted into the positioning groove (17), and an outer wall of the positioning block (16) is attached to an inner wall of the positioning groove (17).

9. A residual current circuit breaker according to claim 1, characterized in that the casing is provided with a threading hole (18), a power line is arranged in the threading hole (18), one end of the power line is connected with the circuit board, and the other end is connected with an arc striking plate.

10. A residual current circuit breaker as claimed in claim 1, characterized in that said trip means comprise a trip bar (20), against which trip bar (20) the plunger of said voltage release (21) can abut and rotate said trip bar (20).

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