Overload protection device and protection method for intelligent measurement switch

Abstract

The invention relates to an overload protection device of an intelligent measuring switch, which comprises a shell, a first binding post and a second binding post are arranged in the shell, the first binding post is electrically connected with an electromagnetic release, the outer side of the electromagnetic release is electrically connected with a first contact piece and a first arc extinguishing electrode, and the second binding post is electrically connected with a second contact piece. The second binding post is electrically connected with the connecting ring, and the connecting ring is electrically connected with the bimetallic strip and the second contact piece. Under the condition that the linkage assembly is powered on, rotation of the rotating arm and the handle can be conveniently achieved through the motor, under the condition that the linkage assembly is powered off, the linkage assembly and the motor do not interfere with rotation of the handle, the linkage assembly, the motor and the remote control device are remotely controlled to be turned on and turned off through the remote control module, and disconnection and connection of a circuit are achieved.

Description

Technical Field

[0001] This invention relates to the field of overload protection device technology, and in particular to an overload protection device and protection method for an intelligent measuring switch. Background Technology

[0002] The intelligent measuring switch is installed at the inlet of the low-voltage metering box to replace the existing ordinary inlet switch. It is a highly integrated intelligent measuring device that, while ensuring the original protection function of the molded case circuit breaker in the metering box, expands and integrates the functions of a three-phase smart energy meter, an electricity consumption information collector, and a smart monitoring terminal for the metering box. The overload protection device is installed in series with the intelligent measuring switch to protect the intelligent measuring switch.

[0003] When using intelligent measurement switches, if short circuits, high current overloads, or low current overloads are not detected and addressed in time, it can easily lead to damage to the intelligent measurement switches, circuits, and equipment. Furthermore, after a short circuit occurs due to an overload protection device, manual adjustment of the connection lines is required, and the circuit connection cannot be completed remotely. Summary of the Invention

[0004] The present invention addresses the problem of providing an overload protection device and method for an intelligent measuring switch. It solves the technical problem that when an intelligent measuring switch is in use, if a short circuit, high current overload, or low current overload occurs in the circuit, and the short circuit is not detected and addressed in time, it can easily lead to damage to the intelligent measuring switch, circuit, and equipment. Furthermore, after the overload protection device short-circuits, subsequent adjustments to the connection lines are required, making it impossible to complete the circuit connection remotely.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An overload protection device for an intelligent measuring switch includes a housing. A first terminal and a second terminal are installed inside the housing. The first terminal is electrically connected to an electromagnetic trip unit. A first contact piece and a first arc-extinguishing electrode are electrically connected to the outside of the electromagnetic trip unit. The second terminal is electrically connected to a connecting ring, which is also electrically connected to a bimetallic strip and a second contact piece. A second arc-extinguishing electrode, penetrating the second contact piece, is connected to the bimetallic strip. An arc-extinguishing grid is installed inside the housing. The first and second arc-extinguishing electrodes are located outside the arc-extinguishing grid. A retaining beam seat is rotatably installed inside the housing, and a moving contact arm is installed within the retaining beam seat. The end of the moving contact arm moves between and contacts the first and second contact pieces. The connecting ring is connected to the moving contact arm via a wire. A handle that rotates synchronously with the moving contact arm is installed on the outside of the housing. An auxiliary mechanism for automatic rotation of the handle is also installed on the outside of the housing.

[0007] Preferably, the end of the bimetallic strip and the end of the second contact piece are attached, and a compression spring is installed between the second contact piece and the shell.

[0008] Preferably, a connecting column is installed in the shell, and the connecting column penetrates the middle of the movable contact arm and the beam seat, a torsion spring is sleeved on the connecting column, and the torsion spring is connected with the connecting column and the beam seat.

[0009] Preferably, an installation arc groove is formed in the beam seat, a horizontal moving groove is formed in the shell, a first pull rod is installed between the installation arc groove and the horizontal moving groove, and the two ends of the first pull rod are located in the installation arc groove and the horizontal moving groove respectively.

[0010] Preferably, two clamping holes are formed in the beam seat, one of the clamping holes is connected with one end of the tension spring, the other end of the tension spring is connected with the shell, the other clamping hole is connected with one end of the second pull rod, and the other end of the second pull rod is connected with the handle.

[0011] Preferably, a fixed column is installed in the shell, the handle is rotatably installed on the fixed column, and a connecting hole is formed in the handle.

[0012] Preferably, the auxiliary mechanism comprises a mounting bracket installed on the side wall of the shell, a motor is installed on the mounting bracket, a remote control module for remote connection with a mobile phone, a controller or the like is installed on the motor, a linkage assembly is connected between the output end of the motor and the rotating arm, a clamping bolt is threadedly installed on the rotating arm, and the end of the clamping bolt is located in the connecting hole.

[0013] Preferably, the linkage assembly comprises a ring seat fixed on the mounting bracket, a U-shaped support seat connected with the output end of the motor through an insulating rod, and a sleeve ring connected with the rotating arm, two conductive rings are installed in the ring seat, the two conductive rings are respectively connected with positive and negative lead wires, a plurality of fixed contacts are installed on the inner side of the conductive ring, two movable contact rings are respectively installed at the two ends of the support seat, the two movable contact rings are different in height, the fixed contacts of the two conductive rings are respectively in contact with the outer walls of the two movable contact rings, an electromagnet is installed at the center of the bottom side of the support seat, and the top of the electromagnet is connected with the two movable contact rings through lead wires, and a circular fixed magnet is installed on the inner wall of the sleeve ring.

[0014] Preferably, the center of rotation of the electromagnet, the fixed magnet and the handle is on the same straight line.

[0015] An overload protection method of an intelligent measurement switch, which is suitable for the overload protection device of the intelligent measurement switch, and the specific operation steps of the method are as follows:

[0016] Step one: the intelligent measuring switch and overload protection device are connected in series on the circuit, when the overload protection device is in the connected state, the movable contact arm is in contact with the contact on the first arc extinguishing electrode, at this time the circuit is in the connected state, when short circuit or large current overload, the strong magnetic field force of the electromagnetic release coil generates, the hammer in the electromagnetic release pops out and acts on the beam seat, at this time the beam seat rotates under the action of the torsional spring and the tension spring, at this time the movable contact arm is separated from the first arc extinguishing electrode, realizing the circuit protection, and when small current overload, the bimetallic strip generates heat and deforms and acts on the first pull lever, at this time the beam seat rotates under the action of the torsional spring and the tension spring, at this time the movable contact arm is separated from the first arc extinguishing electrode, also realizing the circuit protection, and when the circuit is connected and disconnected, the arc generated is transmitted to the arc extinguishing grid through the first arc extinguishing electrode and the second arc extinguishing electrode to eliminate the protection, and after the circuit is normal, the beam seat and the movable contact arm are rotated through the handle to realize the contact of the movable contact arm and the first arc extinguishing electrode;

[0017] Step two: in the automatic protection state of the device, at this time the electromagnet is not connected with power, the handle rotates normally, when remote rotation control of the handle is needed, at this time the electromagnetic iron and the motor are connected with power through the remote control module, the motor works to drive the support seat and the electromagnetic iron to rotate, at this time the electromagnetic iron and the permanent magnet generate magnetic connection, further driving the permanent magnet and the sleeve ring to rotate, realizing the rotation of the rotating arm, the rotating arm drives the handle to rotate through the clamping bolt, and the artificial remote automatic control realizes the circuit breaking and connection.

[0018] The beneficial effects of the present application are: the intelligent measuring switch and the overload protection device are connected in series on the circuit, when short circuit or large current overload, the beam seat and the movable contact arm are rotated by the electromagnetic release to realize the circuit protection, and when small current overload, the beam seat and the movable contact arm are rotated by the bimetallic strip to realize the circuit protection, further realizing the overload protection of the intelligent measuring switch, the circuit and the circuit connection equipment.

[0019] The linkage assembly is convenient for realizing the rotation of the rotating arm and the handle under the power-on condition, and the linkage assembly and the motor do not interfere with the rotation of the handle under the power-off condition, the linkage assembly and the motor are remotely controlled through the remote control module, the remote control device is opened and closed, realizing the circuit breaking and connection. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 It is the overall structure schematic diagram of the present application;

[0021] Fig. 2 It is the first internal structure schematic diagram of the present application;

[0022] Fig. 3 It is the second internal structure schematic diagram of the present application;

[0023] Fig. 4 Fig. 3 is a schematic view of the third structure of the present application;

[0024] Fig. 5 Fig. 4 is a sectional view of the linkage assembly of the present application;

[0025] Fig. 6 Fig. 5 is a schematic view of the linkage assembly structure of the present application.

[0026] Legend:

[0027] 1, housing; 2, first terminal post; 3, second terminal post; 4, electromagnetic release; 5, first contact piece; 6, first arc extinguishing electrode; 7, connecting ring; 8, bimetallic strip; 9, second contact piece; 10, compression spring; 11, second arc extinguishing electrode; 12, arc extinguishing grid; 13, buckle beam seat; 14, movable contact arm; 15, connecting post; 16, torsion spring; 17, tension spring; 18, mounting arc groove; 19, first tension buckle rod; 20, handle; 21, second tension buckle rod; 22, fixed post; 23, connecting hole; 24, mounting bracket; 25, motor; 26, linkage assembly; 27, rotating arm; 28, clasp; 29, ring seat; 30, conductive ring; 31, fixed contact; 32, movable contact ring; 33, support seat; 34, electromagnet; 35, sleeve ring; 36, fixed magnet. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without any creative work fall within the protection scope of the present application.

[0029] The specific embodiments are given below.

[0030] Reference is made to Figs. 1-6An overload protection device of an intelligent measurement switch, comprising a shell 1, a first connecting post 2 and a second connecting post 3 are installed in the shell 1, the first connecting post 2 is electrically connected with an electromagnetic release 4, the outer side of the electromagnetic release 4 is electrically connected with a first contact piece 5 and a first arc extinguishing electrode 6, the second connecting post 3 is electrically connected with a connecting ring 7, and the connecting ring 7 is electrically connected with a bimetallic strip 8 and a second contact piece 9, the end of the bimetallic strip 8 and the end of the second contact piece 9 are attached, and the spring 10 is installed between the end of the second contact piece 9 and the shell 1, the second arc extinguishing electrode 11 is connected on the bimetallic strip 8 and penetrates through the second contact piece 9, an arc extinguishing grid 12 is installed in the shell 1, the first arc extinguishing electrode 6 and the second arc extinguishing electrode 11 are located outside the arc extinguishing grid 12, a buckle beam seat 13 is rotatably installed in the shell 1, and a movable contact arm 14 is installed in the buckle beam seat 13, the end of the movable contact arm 14 moves between the first contact piece 5 and the second contact piece 9 and is in contact with the first contact piece 5 and the second contact piece 9, the connecting ring 7 is connected with the movable contact arm 14 through a wire, and a handle 20 is installed outside the shell 1 and rotates synchronously with the movable contact arm 14;

[0031] A connecting post 15 is installed in the shell 1 and penetrates through the middle part of the buckle beam seat 13 and the movable contact arm 14, a torsion spring 16 is sleeved on the connecting post 15, and the torsion spring 16 is connected with the connecting post 15 and the buckle beam seat 13, an installation arc groove 18 is formed in the buckle beam seat 13, a horizontal moving groove is formed in the shell 1, a first pull buckle rod 19 is installed between the installation arc groove 18 and the horizontal moving groove, and the two ends of the first pull buckle rod 19 are respectively located in the installation arc groove 18 and the horizontal moving groove, two clamping holes are formed in the buckle beam seat 13, one of the clamping holes is connected with one end of a pull spring 17, the other end of the pull spring 17 is connected with the shell 1, the other clamping hole is connected with one end of a second pull buckle rod 21, and the other end of the second pull buckle rod 21 is clamped with the handle 20, a fixing post 22 is installed in the shell 1, the handle 20 is rotatably installed on the fixing post 22, a connecting hole 23 is formed in the handle 20, and the connecting hole 23 is convenient for plug connection with a clamping bolt 28;

[0032] When the overload protection device is in the connected state, the movable contact arm 14 is in contact with the contact on the first arc extinguishing electrode 6, at this time the circuit is in the connected state, when a short circuit or a large current overload occurs, the coil of the electromagnetic release 4 generates a strong magnetic field suction force, the hammer in the electromagnetic release 4 is ejected to act on the buckle beam seat 13, at this time the buckle beam seat 13 rotates under the action of the torsional spring 16 and the tension spring 17, at this time the movable contact arm 14 is separated from the first arc extinguishing electrode 6, realizing circuit breaking protection, and through the second pull buckle 21 pulling the handle 20 to rotate, when a small current overload occurs, the bimetallic strip 8 is heated and deformed to act on the first pull buckle 19, at the same time the buckle beam seat 13 rotates under the action of the torsional spring 16 and the tension spring 17, at this time the movable contact arm 14 is separated from the first arc extinguishing electrode 6, also realizing circuit breaking protection, and when the circuit is connected and disconnected, the arc generated is transmitted to the arc extinguishing grid 12 through the first arc extinguishing electrode 6 and the second arc extinguishing electrode 11 to eliminate protection, and after the circuit is normal, the buckle beam seat 13 and the movable contact arm 14 are rotated through the handle 20, realizing the contact of the movable contact arm 14 with the first arc extinguishing electrode 6.

[0033] An auxiliary mechanism for automatic rotation of the handle 20 is mounted on the outside of the shell 1;

[0034] The auxiliary mechanism includes a mounting frame 24 mounted on the side wall of the shell 1, a motor 25 mounted on the mounting frame 24, and a remote control module mounted on the motor 25 for remote connection with mobile phones, controllers and the like, facilitating remote control, in the case of circuit problems, when the operator is located at the fault site to rotate the handle 20 to power on, there is a risk of danger, the output end of the motor 25 is connected with a rotating arm 27 through a linkage assembly 26, and a clamping bolt 28 is threadedly mounted on the rotating arm 27 and located in the connecting hole 23.

[0035] The linkage assembly 26 includes a ring seat 29 fixed on the mounting frame 24, a U-shaped support seat 33 connected with the output end of the motor 25 through an insulating rod, and a sleeve ring 35 connected with the rotating arm 27, the ring seat 29 is provided with two conductive rings 30 mounted therein, the two conductive rings 30 are respectively connected with positive and negative lead wires, a plurality of fixed contacts 31 are mounted on the inner side of the conductive ring 30, two movable contact rings 32 are respectively mounted at the two ends of the support seat 33, the two movable contact rings 32 are different in height, the fixed contacts 31 of the two conductive rings 30 are respectively in contact with the outer walls of the two movable contact rings 32, an electromagnet 34 is mounted at the center of the bottom side of the support seat 33, and the top of the electromagnet 34 is connected with the two movable contact rings 32 through lead wires, the lead wires on the electromagnet 34 are fixedly attached to the inner wall of the support seat 33, a circular ring-shaped fixed magnet 36 is mounted on the inner wall of the sleeve ring 35, the rotation centers of the electromagnet 34, the fixed magnet 36 and the handle 20 are on the same straight line, under power-on condition, when the electromagnet 34 and the fixed magnet 36 rotate at the same time, the support seat 33 and the movable contact ring 32 on the electromagnet 34 rotate synchronously, and the movable contact ring 32 keeps in contact with the fixed contacts 31 of the two conductive rings 30 during rotation, and is always electrically connected.

[0036] The linkage assembly 26 facilitates the rotation of the rotating arm 27 and the handle 20 by the motor 25 in the power-on state, and does not interfere with the rotation of the handle 20 in the power-off state. The linkage assembly 26 and the motor 25 are remotely controlled by the remote control module, and the remote control device is turned on and off to realize the disconnection and connection of the circuit.

[0037] An overload protection method of an intelligent measurement switch, the specific operation steps of the method are as follows:

[0038] Step one: the intelligent measurement switch and the overload protection device are connected in series on the circuit, when the overload protection device is in the connected state, the moving contact arm 14 is in contact with the contact on the first arc extinguishing electrode 6, at this time the circuit is in the connected state, when short circuit or large current overload occurs, the coil of the electromagnetic release 4 generates a strong magnetic field suction force, the hammer in the electromagnetic release 4 pops out and acts on the beam seat 13, at this time the beam seat 13 rotates under the action of the torsional spring 16 and the tension spring 17, at this time the moving contact arm 14 is separated from the first arc extinguishing electrode 6, realizing the disconnection protection, and when small current overload occurs, the bimetallic strip 8 is heated and deformed to act on the first pull rod 19, at the same time the beam seat 13 rotates under the action of the torsional spring 16 and the tension spring 17, at this time the moving contact arm 14 is separated from the first arc extinguishing electrode 6, also realizing the disconnection protection, and when the circuit is connected and disconnected, the electric arc generated is transmitted to the arc extinguishing grid 12 through the first arc extinguishing electrode 6 and the second arc extinguishing electrode 11 to eliminate the protection, and after the circuit is normal, the beam seat 13 and the moving contact arm 14 are rotated by the handle 20 to realize the contact and connection of the moving contact arm 14 and the first arc extinguishing electrode 6;

[0039] Step two: in the automatic protection state of the device, the electromagnet 34 is not powered on, and the handle 20 rotates normally, when it is needed to remotely control the rotation of the handle 20, the electromagnet 34 and the motor 25 are powered on by the remote control module at this time, the motor 25 works to drive the support seat 33 and the electromagnet 34 to rotate, at this time the electromagnet 34 and the permanent magnet 36 generate magnetic connection, and then drive the permanent magnet 36 and the sleeve ring 35 to rotate, realizing the rotation of the rotating arm 27, the rotating arm 27 drives the handle 20 to rotate through the clasp 28, and the artificial remote automatic control realizes the disconnection and connection of the circuit.

[0040] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An overload protection device of a smart metering switch, characterized by, The utility model provides an arc extinguishing device, including shell (1), first binding post (2) and second binding post (3) are installed in shell (1), first binding post (2) is electrically connected with electromagnetic release (4), the outside of electromagnetic release (4) is electrically connected with first contact piece (5) and first arc extinguishing electrode (6), second binding post (3) is electrically connected with connecting ring (7), and connecting ring (7) is electrically connected with bimetallic strip (8) and second contact piece (9), the second arc extinguishing electrode (11) of bimetallic strip (8) is connected with the second contact piece (9) of going through, arc extinguishing grid (12) is installed in shell (1), and first arc extinguishing electrode (6) and second arc extinguishing electrode (11) are located the outside of arc extinguishing grid (12), the rotating installation of buckle beam seat (13) is installed in shell (1), and the movable contact arm (14) is installed in buckle beam seat (13), and movable contact arm (14) end is moved between first contact piece (5) and second contact piece (9), and is contacted with first contact piece (5) and second contact piece (9), and connecting ring (7) is connected with movable contact arm (14) through wire, and the handle (20) synchronous rotation of movable contact arm (14) is installed outside shell (1), and the auxiliary mechanism for the automatic rotation of handle (20) is installed outside shell (1).

2. The overload protection device of the smart metering switch according to claim 1, characterized in that, The end of bimetallic strip (8) and the end of second contact piece (9) are attached, and a compression spring (10) is installed between the end of second contact piece (9) and shell (1).

3. The overload protection device of the smart metering switch according to claim 1, characterized in that, A connecting column (15) is installed in shell (1), and the middle part of connecting column (15) penetrates buckle beam seat (13) and movable contact arm (14), and a torsion spring (16) is sleeved on connecting column (15), and torsion spring (16) is connected with connecting column (15) and buckle beam seat (13).

4. The overload protection device of the smart metering switch according to claim 1, characterized in that, An installation arc groove (18) is formed on buckle beam seat (13), and a horizontal moving groove is formed in shell (1), a first pull buckle rod (19) is installed between installation arc groove (18) and horizontal moving groove, and both ends of first pull buckle rod (19) are located in installation arc groove (18) and horizontal moving groove respectively.

5. The overload protection device of the smart metering switch according to claim 1, characterized in that, Two clamping holes are formed on buckle beam seat (13), one clamping hole is connected with one end of a pull spring (17), the other end of pull spring (17) is connected with shell (1), and the other clamping hole is connected with one end of a second pull buckle rod (21), and the other end of second pull buckle rod (21) is clamped with handle (20).

6. The overload protection device of the smart metering switch according to claim 1, characterized in that, A fixing column (22) is installed in shell (1), handle (20) is rotatably installed on fixing column (22), and a connecting hole (23) is formed on handle (20).

7. The overload protection device of the smart metering switch according to claim 1, characterized in that, The auxiliary mechanism includes a mounting frame (24) mounted on the side wall of the shell (1), a motor (25) mounted on the mounting frame (24), a remote control module mounted on the motor (25) for remote connection with a mobile phone, a controller, or the like, a linkage assembly (26) connected between the output end of the motor (25) and a rotating arm (27), a clamping bolt (28) threadedly mounted on the rotating arm (27), and the end of the clamping bolt (28) located in the connecting hole (23).

8. The overload protection device of the smart metering switch according to claim 7, characterized in that, The linkage assembly (26) includes a ring seat (29) fixed on the mounting frame (24), a U-shaped support seat (33) connected with the output end of the motor (25) through an insulating rod, and a sleeve ring (35) connected with the rotating arm (27), two conductive rings (30) are installed in the ring seat (29), and the two conductive rings (30) are connected with positive and negative lead wires respectively, a plurality of fixed contacts (31) are installed on the inner side of the conductive ring (30), two movable contact rings (32) are installed at both ends of the support seat (33), the two movable contact rings (32) are different in height, the fixed contacts (31) of the two conductive rings (30) are respectively in contact with the outer walls of the two movable contact rings (32), an electromagnet (34) is installed at the center of the bottom side of the support seat (33), and the top of the electromagnet (34) is connected with the two movable contact rings (32) through lead wires, and a circular ring-shaped fixed magnet (36) is installed on the inner wall of the sleeve ring (35).

9. The overload protection device of the smart metering switch according to claim 8, characterized in that, The rotating centers of the electromagnet (34), the fixed magnet (36) and the handle (20) are on the same straight line.

10. An overload protection method of a smart metering switch, applicable to the overload protection device of any one of claims 1-9, characterized in that, The specific operation steps of the method are as follows: Step one: the intelligent measurement switch and the overload protection device are connected in series on the circuit, the movable contact arm (14) is in contact with the contact point on the first arc extinguishing electrode (6) when the overload protection device is in the connected state, at this time the circuit is in the connected state, when short circuit or large current overload occurs, the coil of the electromagnetic release (4) generates strong magnetic field attraction, the hammer in the electromagnetic release (4) pops out and acts on the buckle beam seat (13), at this time the buckle beam seat (13) rotates under the action of the torsional spring (16) and the tension spring (17), at this time the movable contact arm (14) is separated from the first arc extinguishing electrode (6), realizing circuit breaking protection, and the handle (20) is rotated by the second pull buckle rod (21), when small current overload occurs, the bimetallic strip (8) is heated and deformed to act on the first pull buckle rod (19), at the same time the buckle beam seat (13) rotates under the action of the torsional spring (16) and the tension spring (17), at this time the movable contact arm (14) is separated from the first arc extinguishing electrode (6), also realizing circuit breaking protection, and when the circuit is connected and disconnected, the electric arc generated is transmitted to the arc extinguishing grid (12) through the first arc extinguishing electrode (6) and the second arc extinguishing electrode (11) to eliminate protection, and after the circuit is normal, the buckle beam seat (13) and the movable contact arm (14) are rotated by the handle (20), realizing the contact and connection of the movable contact arm (14) and the first arc extinguishing electrode (6); Step two: in the automatic protection state of the device, at this time the electromagnet (34) is not energized, the handle (20) rotates normally, when remote rotation control of the handle (20) is needed, at this time the electromagnet (34) and the motor (25) are energized through the remote control module, the motor (25) works to drive the support seat (33) and the electromagnet (34) to rotate, at this time the electromagnet (34) and the fixed magnet (36) are magnetically connected, thereby driving the fixed magnet (36) and the sleeve ring (35) to rotate, realizing the rotation of the rotating arm (27), the rotating arm (27) drives the handle (20) to rotate through the clamping bolt (28), and manual remote automatic control realizes the circuit breaking and connection.

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