Backup protector

Abstract

The utility model relates to the technical field of circuit elements, in particular to a backup protector which comprises a shell, the shell is formed by butt joint of two sections of structures, a handle is arranged on one side of the outer wall of the shell, and a switch part for opening and closing a passage is arranged in the shell and located on one side of the handle. According to the utility model, the arc extinguishing cover is arranged in the shell and is arranged at one side of the connection point of the movable contact rod and the static contact of the discharge tube, so that when the movable contact rod is disconnected from the static contact, generated arc can enter the arc extinguishing cover under the action of magnetism and heat, and the arc extinguishing cover is arranged at the other side of the connection point of the movable contact rod and the static contact of the discharge tube. And the arc extinguishing cover divides the arc into 12 sections to quickly cool and extinguish the arc, so that the residual arc current in the device is reduced, and the damage of the arc current to the backup protector and the whole circuit is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit elements, in particular to a backup protector. Background Art

[0002] The backup protector is mainly used as a backup protection for lightning arresters and surge protectors. When the lightning arrester deteriorates or is damaged, the protection circuit is disconnected from the main circuit. It has two main functions. One is that it can withstand currents equal to or greater than that of the surge protector; the other is that it can shut down in time when a very small power frequency current (generally less than or equal to 3A) occurs.

[0003] When the existing backup protector is closed, an arc flow will be generated after the current is disconnected from the contacts. If the arc flow is not eliminated in time, it will affect the internal circuit components of the backup protector. The existing backup protector has low efficiency in cooling and extinguishing the arc flow when in use, resulting in the current not being able to be interrupted quickly, which will affect the circuit and protector.

[0004] In summary, it is necessary to invent a backup protector. Utility Model Content

[0005] To this end, the utility model provides a backup protector to solve the problem that the existing backup protector has low efficiency in cooling and extinguishing the arc flow during use, resulting in the current not being able to be interrupted quickly, thus affecting the circuit and the protector.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solution: a backup protector, comprising a shell, the shell being formed by docking two sections, a handle being provided on one side of the outer wall of the shell, a switch component for opening and closing the passage being provided inside the shell and on one side of the handle, and the shell also being provided with a current terminal component.

[0007] Preferably, the current end circuit component includes an electromagnetic coil frame, which is installed in an electromagnetic coil slot opened in the outer shell, and an electromagnetic coil fixed iron core is installed on one side of the inner wall of the electromagnetic coil frame, and a push rod is installed on the side end of the electromagnetic coil frame and close to the electromagnetic coil fixed iron core, and the push rod is installed on the side close to the switch component.

[0008] Preferably, an electromagnetic coil moving iron core is installed inside the electromagnetic coil skeleton and at one end away from the top rod, and an electromagnetic coil spring is arranged on the inner wall of the electromagnetic coil skeleton and between the electromagnetic coil moving iron core and the electromagnetic coil fixed iron core away from the top rod. The top rod is inserted into the inner wall of the electromagnetic coil skeleton and abuts against the electromagnetic coil spring. The outer walls of the electromagnetic coil skeleton are clamped with electromagnetic coil outer frames at both ends, and the bottom end of the electromagnetic coil outer frame abuts against the bottom end of the inner wall of the electromagnetic coil slot.

[0009] Preferably, a discharge tube mounting groove is provided on the inner wall of the shell and on one side close to the moving iron core of the electromagnetic coil, a discharge tube is fixed in the discharge tube mounting groove, a wiring frame is installed on the end of the discharge tube away from the top rod, and the wiring frame is fixed at a corresponding position on the inner wall of the shell.

[0010] Preferably, a discharge tube upper cover is installed on the inner wall of the shell and located above the discharge tube, and an arc extinguishing hood is installed inside the shell and located on the side of the discharge tube away from the wiring frame, with blocking pieces fixed at both ends of the arc extinguishing hood.

[0011] Preferably, a terminal block is installed at one end of the arc extinguishing cover away from the terminal frame, and one side of the terminal frame and the terminal block are both threadedly connected with a locking screw.

[0012] Preferably, the switching component has a moving contact rod, which is rotatably connected to the inner wall of the shell through a first pin shaft, and the moving contact rod is installed on a side close to the terminal block. The end of the arc extinguishing cover away from the discharge tube is electrically connected to the terminal block through a transmission line, and the top end of the outer wall of the moving contact rod is connected to a tripping beam through a first pin shaft, and a locking beam is integrally fixed to one side of the tripping beam, and a mechanical structure spring is provided between the locking beam and the side end of the inner wall of the shell.

[0013] Preferably, a manual tripping beam is installed at the top end of the outer wall of the locking beam, and the manual tripping beam and the locking beam are connected by a second pin shaft. A main beam is integrally fixed to one end of the moving contact rod close to the manual tripping beam, and the main beam is rotatably connected to the inner wall of the outer shell through a third pin shaft.

[0014] Preferably, a mounting groove is provided on the inner wall of the shell at a position corresponding to the handle, the handle is connected to the mounting groove through a fourth pin shaft, the mounting groove is also provided with a handle spring for resetting, and the handle is connected to the top end of the manual trip beam through a connecting rod.

[0015] The beneficial effects of the utility model are:

[0016] In the utility model, an arc extinguishing hood is provided in the housing and is placed on one side of the connection point between the moving contact rod and the static contact of the discharge tube. When the moving contact rod is disconnected from the static contact, the generated arc can enter the arc extinguishing hood under the action of magnetism and heat. The arc extinguishing hood divides the arc into 12 sections to quickly cool and extinguish it, thereby reducing the residual arc flow in the device and avoiding damage to the backup protector and the entire circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall external structure of the utility model;

[0018] Figure 2This is a schematic diagram of the explosion structure of the utility model when viewed from the side;

[0019] Figure 3 For this utility model Figure 1 Schematic diagram of the internal structure in the left end direction;

[0020] Figure 4 For this utility model Figure 1 Schematic diagram of the internal structure in the right side direction;

[0021] Figure 5 This is a schematic diagram of the circuit principle of the utility model.

[0022] In the figure: 100, housing; 200, handle; 300, electromagnetic coil skeleton; 310, push rod; 320, electromagnetic coil fixed core; 330, electromagnetic coil spring; 340, electromagnetic coil moving core; 350, electromagnetic coil outer frame; 400, wiring frame; 410, discharge tube; 420, discharge tube upper cover; 500, arc extinguishing cover; 600, wiring board; 700, moving contact rod; 710, tripping beam; 720, manual tripping beam; 730, locking beam; 740, main beam; 741, mechanical structure spring. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0024] Refer to the attached Figure 1-Figure 5The utility model provides a backup protector, including a shell 100, which is a two-section structure connected together. A handle 200 is provided on one side of the outer wall of the shell 100. A switch component for opening and closing the passage is provided inside the shell 100 and on one side of the handle 200. The switch component is a moving contact rod 700. The moving contact rod 700 is rotatably connected to the inner wall of the shell 100 through a first pin shaft. The moving contact rod 700 is installed on a side close to the terminal block 600. The moving contact rod 700 can determine whether the current is in the protection state by disconnecting and connecting with the static contact. The arc extinguishing cover 500 is connected or disconnected in the device, and the end of the arc extinguishing cover 500 away from the discharge tube 410 is electrically connected to the terminal block 600 through the transmission line. The top of the outer wall of the moving contact rod 700 is connected to the tripping beam 710 through the first pin shaft. The tripping beam 710 is provided to control the rotation of the moving contact rod 700 so that the moving contact rod 700 and the side end of the discharge tube 410 are separated and disconnected. A locking beam 730 is fixed to one side of the tripping beam 710. A mechanical structure spring 741 is provided between the locking beam 730 and the inner wall side end of the housing 100. The top of the outer wall of the locking beam 730 is connected to the terminal block 600 through the transmission line. A manual tripping beam 720 is installed at the end, and a locking beam 730 is provided to cooperate with the manual tripping beam 720 to enable the tripping beam 710 to rotate, thereby actuating the moving contact rod 700. The manual tripping beam 720 and the locking beam 730 are connected by a second pin shaft, and the manual tripping beam 720 and the locking beam 730 are connected by the second pin shaft so that the manual tripping beam 720 can drive the locking beam 730 to rotate when the manual tripping beam 720 is actuated, so that the tripping beam 710 can toggle the moving contact rod 700, and the moving contact rod 700 is close to the manual tripping beam 720. A main beam 740 is integrally fixed to one end of the housing 100, and the main beam 740 is rotatably connected to the inner wall of the housing 100 through a third pin shaft. A mounting groove is provided on the inner wall of the housing 100 at a position corresponding to the handle 200. The handle 200 is connected to the mounting groove through a fourth pin shaft. The mounting groove is also provided with a handle spring for resetting. The handle 200 is connected to the top of the manual tripping beam 720 through a connecting rod. When the handle 200 is toggled, the connecting rod can drive the manual tripping beam 720 to move, so that the manual tripping beam 720 can drive the locking beam 730 and the tripping beam 710 to move;

[0025] The housing 100 is also provided with a current terminal component, which includes an electromagnetic coil frame 300. The electromagnetic coil frame 300 is installed in the electromagnetic coil slot opened in the housing 100. An electromagnetic coil fixed iron core 320 is installed on one side of the inner wall of the electromagnetic coil frame 300. A push rod 310 is installed on the side end of the electromagnetic coil frame 300 and close to the electromagnetic coil fixed iron core 320. The push rod 310 is installed on the side close to the switch component. An electromagnetic coil moving iron core 340 is installed on the inside of the electromagnetic coil frame 300 and away from the push rod 310. An electromagnetic coil spring 330 is provided between the inner wall of the electromagnetic coil frame 300 and away from the electromagnetic coil moving iron core 340 and the electromagnetic coil fixed iron core 320. The push rod 310 is inserted into the electromagnetic coil frame 300. One end of the inner wall of the electromagnetic coil skeleton 300 abuts against the electromagnetic coil spring 330, and the two ends of the outer wall of the electromagnetic coil skeleton 300 are clamped with the electromagnetic coil outer frame 350. The bottom end of the electromagnetic coil outer frame 350 abuts against the bottom end of the inner wall of the electromagnetic coil slot. The electromagnetic coil moving iron core 340 is capable of sliding inside the electromagnetic coil skeleton 300. When sliding, the electromagnetic coil moving iron core 340 can control the push rod 310 to slide on the other end of the electromagnetic coil skeleton 300 through the action of the electromagnetic coil spring 330, so that the push rod 310 can push the moving contact rod 700 to rotate, so that the moving contact rod 700 and the arc extinguishing cover 500 change from a contact state to a disconnected state, thereby disconnecting the circuit in the protector;

[0026] A discharge tube mounting groove is provided on the inner wall of the housing 100 and on one side close to the electromagnetic coil moving iron core 340, in which a discharge tube 410 is fixed, and a wiring frame 400 is installed at the end of the discharge tube 410 away from the top rod 310, and the wiring frame 400 is fixed at a corresponding position on the inner wall of the housing 100. The wiring frame 400 is provided to facilitate personnel to electrically connect external wires to the protector, and a discharge tube upper cover 420 is installed on the inner wall of the housing 100 and above the discharge tube 410, and the discharge tube upper cover 420 is provided to protect the discharge tube 410. An arc extinguishing cover 500 is installed inside the housing 100 and on the side of the discharge tube 410 away from the wiring frame 400, and baffles are fixed at both ends of the arc extinguishing cover 500, and the arc extinguishing cover 500 is provided to extinguish the arc flow generated when the contacts are disconnected. The arc cover 500 can divide the arc flow into 12 segments to increase the extinguishing rate of the arc flow. When the voltage exceeds a certain threshold, the discharge tube 410 will be turned on to form a conductive path, and the discharge tube 410 will energize the electromagnetic coil frame 300, so that magnetic force is generated inside the electromagnetic coil frame 300, so that the electromagnetic coil moving iron core 340 pushes the top rod 310 to move, thereby causing the moving contact rod 700 to rotate and separate from the static contact at the side end of the discharge tube 410. The arc flow generated when the moving contact rod 700 and the static contact are disconnected will enter the arc extinguishing cover 500. A terminal block 600 is installed on the end of the arc extinguishing cover 500 away from the wiring frame 400. A locking screw is threaded on one side of the wiring frame 400 and the terminal block 600. The terminal block 600 has the same function as the wiring frame 400, both of which are used to connect to the external circuit.

[0027] The use process of the present invention is as follows: First, personnel can assemble the device according to the above instructions and electrically connect the external circuit cables to the device through the wiring frame 400 and the wiring board 600 and the locking screws;

[0028] When a person turns the handle 200, the handle 200 drives the trip beam 710 through the connecting rod to push the movable contact rod 700 to rotate, so that the movable contact rod 700 contacts the power transmission copper belt of the terminal block 600. In this way, external current can enter through the terminal block 600 and then be transmitted to the movable contact rod 700 through the power transmission copper belt. The movable contact rod 700 contacts the static contact, so it transmits the current to the static contact. The static contact is electrically connected to the terminal frame 400, so the current is conducted through the terminal frame 400 through another wire, thus completing the transmission of current within the protector.

[0029] When an overcurrent or short circuit occurs, the voltage exceeds the threshold, causing the discharge tube 410 to conduct, forming a conductive path. The discharge tube 410 energizes the electromagnetic coil bobbin 300, generating a magnetic force inside the electromagnetic coil bobbin 300. The electromagnetic coil's moving iron core 340 pushes the push rod 310 to move, causing the movable contact rod 700 to rotate and separate from the static contact at the side of the discharge tube 410. The arc flow generated by the disconnection between the movable contact rod 700 and the static contact enters the arc extinguishing hood 500, which divides the arc into 12 segments, quickly cooling and extinguishing it. Once the arc is extinguished, the current is completely interrupted.

[0030] The above description is merely a preferred embodiment of the present invention. Anyone skilled in the art may utilize the above-described technical solutions to modify the present invention or create equivalent technical solutions. Therefore, any simple modification or equivalent replacement based on the technical solutions of the present invention falls within the scope of protection claimed by the present invention.

Claims

1. A backup protector, comprising a housing (100), wherein the housing (100) is formed by butting together two sections, and a handle (200) is provided on one side of the outer wall of the housing (100), characterized in that: A switch component for opening and closing the passage is provided inside the housing (100) and on one side of the handle (200), and the housing (100) is also provided with a current terminal component.

2. A backup protector according to claim 1, characterized in that: The current end circuit component comprises an electromagnetic coil frame (300), the electromagnetic coil frame (300) being mounted in an electromagnetic coil slot provided in the housing (100), an electromagnetic coil fixed iron core (320) being mounted on one side of the inner wall of the electromagnetic coil frame (300), a push rod (310) being mounted on a side end of the electromagnetic coil frame (300) close to the electromagnetic coil fixed iron core (320), and the push rod (310) being mounted on a side close to the switch component.

3. A backup protector according to claim 2, characterized in that: An electromagnetic coil moving iron core (340) is installed inside the electromagnetic coil frame (300) and at one end away from the top rod (310); an electromagnetic coil spring (330) is provided between the inner wall of the electromagnetic coil frame (300) and away from the electromagnetic coil moving iron core (340) and the electromagnetic coil fixed iron core (320); the top rod (310) is inserted into one end of the inner wall of the electromagnetic coil frame (300) and abuts against the electromagnetic coil spring (330); the outer walls of the electromagnetic coil frame (300) are clamped with electromagnetic coil outer frames (350) at both ends; the bottom end of the electromagnetic coil outer frame (350) abuts against the bottom end of the inner wall of the electromagnetic coil slot.

4. A backup protector according to claim 2, characterized in that: A discharge tube installation groove is provided on the inner wall of the housing (100) and on one side close to the electromagnetic coil moving iron core (340). A discharge tube (410) is fixed in the discharge tube installation groove. A wiring frame (400) is installed at one end of the discharge tube (410) away from the top rod (310). The wiring frame (400) is fixed at a corresponding position on the inner wall of the housing (100).

5. A backup protector according to claim 4, characterized in that: A discharge tube upper cover (420) is installed on the inner wall of the housing (100) and located above the discharge tube (410), and an arc extinguishing cover (500) is installed inside the housing (100) and located on a side of the discharge tube (410) away from the wiring frame (400), with blocking pieces fixed at both ends of the arc extinguishing cover (500).

6. A backup protector according to claim 5, characterized in that: A terminal block (600) is installed at one end of the arc extinguishing cover (500) away from the terminal block frame (400), and one side of each of the terminal block frame (400) and the terminal block (600) is threadedly connected with a locking screw.

7. The backup protector according to claim 5, characterized in that: The switch component comprises a movable contact rod (700), the movable contact rod (700) being rotatably connected to the inner wall of the housing (100) via a first pin shaft, the movable contact rod (700) being installed on a side close to the terminal block (600), the end of the arc extinguishing cover (500) away from the discharge tube (410) being electrically connected to the terminal block (600) via a transmission line, the top end of the outer wall of the movable contact rod (700) being connected to a tripping beam (710) via a first pin shaft, a locking beam (730) being integrally fixed to one side of the tripping beam (710), and a mechanical structure spring (741) being provided between the locking beam (730) and the side end of the inner wall of the housing (100).

8. The backup protector according to claim 7, characterized in that: A manual tripping beam (720) is installed at the top end of the outer wall of the locking beam (730), and the manual tripping beam (720) and the locking beam (730) are connected via a second pin shaft. A main beam (740) is integrally fixed to one end of the moving contact rod (700) close to the manual tripping beam (720), and the main beam (740) is rotatably connected to the inner wall of the housing (100) via a third pin shaft.

9. The backup protector according to claim 8, characterized in that: A mounting groove is provided on the inner wall of the housing (100) at a position corresponding to the handle (200). The handle (200) is connected to the mounting groove via a fourth pin. A handle spring for resetting is also provided in the mounting groove. The handle (200) is connected to the top end of the manual tripping beam (720) via a connecting rod.

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