A lightning protection backup protector with automatic gate discharge

Abstract

The invention discloses an automatic strobe discharge lightning protection backup protector, comprising a snap-on shell, wherein a tripping mechanism, a current path component, a detection circuit and a remote signaling circuit are arranged inside the snap-on shell, wherein the tripping mechanism comprises a handle switch, a DC electromagnet, a tripping steering sheet and a spring component, wherein the current path component comprises an incoming terminal, a connecting copper strip, a moving contact, a static contact, a connecting copper strip and an outgoing terminal, wherein the detection circuit comprises a current sensor and a circuit main board, and wherein the remote signaling circuit comprises a circuit sub-board and a sub-board frame; when in use, the backup protector is connected in series between a power supply lightning arrester and a grounding protection circuit, and a method for detecting current characteristics is used, wherein when the power supply circuit is disturbed by lightning or surge, the power supply lightning arrester discharges to the ground through the backup protector, and at this time, the backup protector keeps the current flowing smoothly, and once the power supply lightning arrester fails and short-circuits, the backup protector can be quickly tripped and disconnected, thereby preventing a short-circuit accident of the power supply circuit to the ground.

Description

Technical Field

[0001] The invention relates to the technical field of lightning protection safety of power supply system, in particular to a lightning protection backup protector with automatic gated discharge. Background Art

[0002] The backup protector is a safety protection product that prevents the power supply lightning arrester itself from malfunctioning. Because the power supply lightning arrester is connected in series between the protected power line and the earth terminal when in use, it can quickly release large current to the earth when the power line is impacted by external lightning or internal surge, and limit the impact high voltage to a lower voltage protection level. However, the power supply lightning arrester may fail or even have an internal short circuit when it reaches a certain lifespan, which may cause a dangerous accident of a short circuit between the power supply line and the earth line. For this reason, in recent years, people have connected the backup protector in series between the power supply lightning arrester and the earth line. On the one hand, it can disconnect and trip when a continuous short-circuit current flows through it, which plays a protective role. On the other hand, it keeps the discharge path closed and does not trip when an instantaneous lightning current flows through it.

[0003] However, the traditional backup protector is designed with two discharge channels. The lightning current channel is provided with a discharge element and a damping element, and the anti-short circuit channel is provided with an electromagnetic coil, so as to select the lightning current and disconnect the power frequency current. As a result, it is often unable to accurately distinguish between the lightning current and the power frequency current. In the event of a large lightning strike, it will trip prematurely, disconnecting the lightning protection discharge circuit and losing the lightning protection function; and some damping and discharge elements set for conducting the lightning current increase the residual pressure of the discharge circuit, which is not conducive to the lightning protection of electrical equipment. For this reason, we propose a lightning protection backup protector with automatic discharge selection. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a lightning protection backup protector with automatic gated discharge, which adopts a method of detecting current characteristics to accurately select circuit on and off, has only one discharge circuit, eliminates traditional discharge elements and damping elements, greatly reduces the residual pressure of the backup protector itself, ensures the safety of the power supply lightning arrester, and improves the effectiveness of the power supply lightning protection.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a lightning protection backup protector with automatic gated discharge, comprising a snap-fit ​​shell, wherein a tripping mechanism, a current path component, a detection circuit and a remote signaling circuit are arranged inside the snap-fit ​​shell, wherein the tripping mechanism comprises a handle switch, a DC electromagnet, a tripping steering plate and a spring component, wherein the current path component comprises an incoming terminal, a connecting copper strip, a moving contact, a static contact connecting copper strip and an outgoing terminal, wherein the detection circuit comprises a current sensor and a circuit main board, wherein a microprocessor, a detection circuit, a boost circuit, a drive circuit, a sampling interface, an electromagnetic drive port, a remote signaling drive port and a battery interface are arranged on the circuit main board, wherein the remote signaling circuit comprises a circuit sub-board and a sub-board frame, and a button battery is arranged on the circuit sub-board.

[0006] Preferably, the snap-fit ​​shell is divided into left and right half shells, fixing rivets are arranged between the half shells of the snap-fit ​​shell, and a mounting clamp is arranged at the lower rear side of the snap-fit ​​shell.

[0007] Preferably, the front upper layer of the snap-fit ​​shell is provided with an inlet screw hole, in which an inlet screw is provided, and the rear upper layer of the snap-fit ​​shell is provided with an outlet screw hole, in which an outlet screw is provided.

[0008] Preferably, an inlet port is provided below the front end of the snap-fit ​​housing, and an inlet terminal is provided in the inlet port; an outlet port is provided below the rear end of the snap-fit ​​housing, and an outlet terminal is provided in the outlet port.

[0009] Preferably, the handle switch is located above the snap-fit ​​housing and is connected with a handle shaft. When the handle switch is pushed forward, the moving contact and the static contact contact to form a passage. When the handle switch is bounced backward, the moving contact and the static contact are separated and the passage is disconnected.

[0010] Preferably, the tripping mechanism is located above the interior of the snap-fit ​​housing, a shifting push rod is provided in the middle of the DC electromagnet, the end of the shifting push rod is in close contact with the lower end of the tripping steering piece, and the upper end of the tripping steering piece is connected to the handle switch via a spring assembly.

[0011] Preferably, the current path component and the detection circuit are both located at the lower interior of the snap-fit ​​housing, the current sensor is sleeved on the connecting copper bar, the current sensor is signal-connected to the main circuit board, and a remote signaling interface is provided on the circuit sub-board.

[0012] Preferably, the microprocessor is connected to the output circuit of the detection circuit, the microprocessor is connected to the drive circuit, and the drive circuit is respectively connected to the electromagnetic drive port and the remote signal drive port.

[0013] Preferably, a signal acquisition line is connected between the current sensor and the sampling interface, a drive signal line is connected between the DC electromagnet and the electromagnetic drive port, a remote signal line is connected between the remote signal interface and the remote signal drive port, and a DC power line is connected between the button battery and the battery interface.

[0014] Preferably, the circuit sub-board is mounted on the sub-board frame, the sub-board frame is inserted at the lower front side of the snap-fit ​​shell, a snap-fit ​​protrusion is provided on the top of the sub-board frame, and a snap-fit ​​circular pit is provided inside the snap-fit ​​shell corresponding to the position of the snap-fit ​​protrusion.

[0015] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0016] When in use, this backup protector is connected in series between the power supply lightning arrester and the grounding protection circuit. When the power supply line is disturbed by lightning or surge, the power supply lightning arrester discharges to the ground through the backup protector. At this time, the backup protector keeps the current unobstructed. Once the power supply lightning arrester itself fails and short-circuits, the backup protector can quickly trip and disconnect to prevent a short-circuit accident of the power supply line to the ground. The method of detecting current characteristics can accurately select the circuit on and off. Only one discharge circuit is provided, and the traditional discharge element and damping element are cancelled, which greatly reduces the residual pressure of the backup protector itself, ensures the safety of the power supply lightning arrester, and improves the effectiveness of the power supply lightning protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the appearance structure diagram of the present invention;

[0018] Figure 2 It is the opening state diagram of the present invention;

[0019] Figure 3 It is a closing state diagram of the present invention;

[0020] Figure 4 This is a control principle block diagram of the circuit mainboard of the present invention;

[0021] Figure 5 It is a schematic diagram of installing the circuit sub-board of the present invention.

[0022] Among them: 1. Snap-on shell; 2. Inlet screw hole; 3. Inlet port; 4. Remote signal interface; 5. Connecting copper strip; 6. Circuit sub-board; 7. Moving contact; 8. Static contact; 9. Circuit main board; 9a. Microprocessor; 9b. Detection circuit; 9c. Boost circuit; 9d. Drive circuit; 9e. Sampling interface; 9f. Electromagnetic drive port; 9g. Remote signal drive port; 9h. Battery interface; 10. Fixing rivet; 11. Mounting clamp; 12. Outlet port; 13. Current sensor; 1 4. Wire outlet screw hole; 15. Connecting copper bar; 16. Handle switch; 17. Handle shaft; 18. Sub-board frame; 19. Disengagement steering plate; 20. Shifting push rod; 21. DC electromagnet; 22. Inlet screw; 23. Inlet terminal; 24. Outlet screw; 25. Outlet terminal; 26. Spring assembly; 27. Drive signal line; 28. Remote signal line; 29. ​​Button battery; 30. DC power line; 31. Signal acquisition line; 32. Snap-on convex head; 33. Snap-on round pit. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention. The experimental methods in the following embodiments, unless otherwise specified, are conventional methods, and the materials, components, etc. used in the following embodiments, unless otherwise specified, can all be obtained from commercial channels.

[0024] Example

[0025] Please refer to Figures 1 to 5As shown, the present invention provides a lightning protection backup protector with automatic gated discharge, including a snap-on shell 1, the snap-on shell 1 is divided into left and right half shells, a fixing rivet 10 is connected between the half shells of the snap-on shell 1, a mounting clamp 11 is arranged at the lower rear side of the snap-on shell 1, and a tripping mechanism, a current path component, a detection circuit and a remote signaling circuit are arranged inside the snap-on shell 1. The tripping mechanism includes a handle switch 16, a DC electromagnet 21, a tripping steering sheet 19 and a spring component 26, and the current path component includes an incoming terminal 23, a connecting copper strip 5, a moving contact 7, and a static contact 8 connecting copper strips. 15 and an outlet terminal 25, the detection circuit includes a current sensor 13 and a circuit main board 9, the circuit main board 9 is provided with a microprocessor 9a, a detection circuit 9b, a boost circuit 9c, a drive circuit 9d, a sampling interface 9e, an electromagnetic drive port 9f, a remote signal drive port 9g and a battery interface 9h, the remote signal circuit includes a circuit sub-board 6 and a sub-board frame 18, a button battery 29 is provided on the circuit sub-board 6, an inlet screw hole 2 is provided on the front upper layer of the buckled housing 1, an inlet screw 22 is provided in the inlet screw hole 2, an outlet screw 14 is provided on the rear upper layer of the buckled housing 1, and the outlet screw 14 An outlet screw 24 is provided inside, an inlet port 3 is provided below the front end of the buckled housing 1, an inlet terminal 23 is provided inside the inlet port 3, an outlet port 12 is provided below the rear end of the buckled housing 1, an outlet terminal 25 is provided inside the outlet port 12, a handle switch 16 is located above the buckled housing 1 and is connected with a handle shaft 17, when the handle switch 16 is pushed to the front side, the moving contact 7 and the static contact 8 contact to form a passage, when the handle switch 16 is bounced to the rear side, the moving contact 7 and the static contact 8 are separated and the passage is disconnected, when installed and used, the inlet terminal 23 is connected to the lower lead of the power lightning arrester, and the outlet terminal 2 5. Connect the external earth terminal with a wire. When the power line is disturbed by lightning or surge, the power lightning arrester discharges to the ground through the backup protector. At this time, the backup protector keeps the current flowing smoothly. Once the power lightning arrester fails and short-circuits, the backup protector can quickly trip and disconnect to prevent the power line from short-circuiting to the ground. The present invention uses the detection current characteristic to accurately select the circuit on and off. Only one discharge circuit is provided, and the traditional discharge element and damping element are cancelled, which greatly reduces the residual pressure of the backup protector itself, ensures the safety of the power lightning arrester, and improves the efficacy of the power lightning protection.

[0026] like Figure 2 , Figure 3As shown, the present invention discloses that the tripping mechanism is located at the upper part of the buckled housing 1, a shifting push rod 20 is arranged in the middle of the DC electromagnet 21, the end of the shifting push rod 20 and the lower end of the tripping steering piece 19 are close to each other, the upper end of the tripping steering piece 19 is connected to the handle switch 16 via the spring assembly 26, the current path assembly and the detection circuit are both located at the lower part of the buckled housing 1, the current sensor 13 is sleeved on the connecting copper bar 15, the current sensor 13 and the circuit main board 9 are connected by signal, the circuit sub-board 6 is provided with a remote signal interface 4, if the backup protector is in the tripping state, the handle switch 16 is rebounded to the rear end, the end of the shifting push rod 20 of the internal DC electromagnet 21 is pushed to the right, and the lower end of the tripping steering piece 19 is pushed to the The right side makes the upper end of the tripping steering piece 19 push upward, and the moving contact 7 is bounced to the right side through the spring assembly 26, so that it is separated from the static contact 8; in the actual action state, the shifting top rod 20 of the DC electromagnet 21 only needs to be pushed to the right for a moment, and the shifting top rod 20 retracts to the left after the tripping, and the spring assembly 26 maintains the tripping state of the moving and static contacts. If the backup protector is in the closed state, the handle switch 16 is pushed to the front end, and the end of the shifting top rod 20 of the internal DC electromagnet 21 retracts to the left. Under the action of the handle switch 16, the lower end of the tripping steering piece 19 is pushed to the left through the spring assembly 26, so that the upper end of the tripping steering piece 19 is pressed downward, and the moving contact 7 is bounced to the left side, so that it is closed and connected with the static contact 8.

[0027] like Figure 4As shown, the present invention discloses that the output circuit of the microprocessor 9a is connected to the detection circuit 9b, the microprocessor 9a is connected to the drive circuit 9d, the drive circuit 9d is respectively connected to the electromagnetic drive port 9f and the remote signal drive port 9g, a signal acquisition line 31 is connected between the current sensor 13 and the sampling interface 9e, a drive signal line 27 is connected between the DC electromagnet 21 and the electromagnetic drive port 9f, a remote signal line 28 is connected between the remote signal interface 4 and the remote signal drive port 9g, a DC power line 30 is connected between the button battery 29 and the battery interface 9h, the detection circuit on the circuit main board 9 has a detection operation function, and the detected current signal characteristic parameters can be transmitted to the microprocessor 9a, and the microprocessor 9a determines whether to output a trip signal after judging the current parameters. When it is judged that the current flowing through the connecting copper bar 15 is a lightning current or a surge current, the microprocessor 9a sends a signal to the drive circuit not to perform electromagnetic driving and remote control. When the current flowing through the connecting copper strip 15 is the power frequency current and the current is ≥3A, the microprocessor 9a will send the electromagnetic drive and remote signal fault instructions to the drive circuit, and the drive circuit will immediately send a pulse signal sufficient to actuate the DC electromagnet 21 to the electromagnetic drive port 9f, and at the same time send the fault displacement contact signal to the remote signal drive port 9g; since the driving current of the DC electromagnet 21 is relatively large, the long-term connection of the driving signal consumes a large amount of power on the button battery 29, and the design of the tripping mechanism only needs a pulse driving current to actuate the displacement push rod 20 of the DC electromagnet 21, so as to push the tripping conversion piece 19 to turn, drive the spring assembly 26 to cause tripping and maintain the separation state of the moving and static contacts; the remote signal displacement signal will maintain the converted state after the driving signal disappears, and can provide remote fault monitoring.

[0028] like Figure 5 As shown, the present invention discloses that the circuit sub-board 6 is clamped on the sub-board frame 18, and the sub-board frame 18 is inserted at the front side and lower part of the snap-fit ​​shell 1, and a clamping protrusion 32 is arranged on the top of the sub-board frame 18, and a clamping circular pit 33 is opened inside the snap-fit ​​shell 1 corresponding to the position of the clamping protrusion 32, and the clamping protrusion 32 is clamped into the clamping circular pit 33, so that the sub-board frame 18 is not easy to fall out, and when the remote signal interface 4 is assembled in place, its outer side protrudes 2 mm more than the snap-fit ​​shell 1, when the button battery 29 needs to be replaced, the remote signal interface 4 can be pulled out together with the sub-board frame 18, and the sub-board frame 18 can be pushed in and clamped after the new battery is replaced.

[0029] The invention provides a lightning protection backup protector with automatic gate discharge, which adopts a single-chip microprocessor technology, detects the frequency and size of the current flowing through the internal copper bar through a sensor, and distinguishes whether it is a normal high-frequency lightning current discharge or an abnormal power frequency short-circuit current. After the handle switch 16 is pushed upward, the internal moving contact 7 and the static contact 8 are tightly closed, so that the incoming port 3 and the outgoing port 12 form a conductive path, and the path is kept unobstructed when a high-frequency lightning current or a surge impact current flows through. When the power frequency current flows through and the current is ≥3A, the microprocessor 9a outputs a driving signal, on the one hand, drives the DC electromagnet to act through the driving component 9d, and its shifting push rod 20 pushes the tripping steering piece 19 to deflect, causing the handle switch 16 to trip downward, so that the moving and static contacts are separated, so that the power supply lightning arrester connected in series to the incoming port of the backup protector is disconnected from the protective ground wire, and on the other hand, the microprocessor 9a outputs a remote signal change signal through the driving component 9d, sends a discharge path tripping signal, prompts the staff to handle the fault in time, and ensures the safety of the power supply line.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lightning protection backup protector with automatic gate discharge, comprising a snap-fit ​​housing (1), characterized in that: The snap-fit ​​housing (1) is provided with a tripping mechanism, a current path component, a detection circuit and a remote signaling circuit inside; The tripping mechanism comprises a handle switch (16), a DC electromagnet (21), a tripping steering plate (19) and a spring assembly (26); The current path component comprises an incoming terminal (23), a connecting copper strip (5), a moving contact (7), a stationary contact (8) connecting copper strip (15) and an outgoing terminal (25); The detection circuit comprises a current sensor (13) and a circuit mainboard (9), and the circuit mainboard (9) is provided with a microprocessor (9a), a detection circuit (9b), a boost circuit (9c), a drive circuit (9d), a sampling interface (9e), an electromagnetic drive port (9f), a remote signal drive port (9g) and a battery interface (9h); The remote signaling circuit comprises a circuit sub-board (6) and a sub-board frame (18), and a button battery (29) is arranged on the circuit sub-board (6); The handle switch (16) is located above the buckled housing (1) and is connected to a handle rotating shaft (17). When the handle switch (16) is pushed forward, the moving contact (7) and the stationary contact (8) contact to form a passage. When the handle switch (16) is bounced backward, the moving contact (7) and the stationary contact (8) separate and the passage is disconnected. The release mechanism is located above the interior of the buckling housing (1), a displacement push rod (20) is arranged in the middle of the DC electromagnet (21), the end of the displacement push rod (20) and the lower end of the release steering plate (19) are close to each other, and the upper end of the release steering plate (19) is connected to the handle switch (16) via a spring assembly (26); The current path component and the detection circuit are both located at the lower part of the buckled housing (1); the current sensor (13) is sleeved on the connecting copper bar (15); the current sensor (13) is signal-connected to the main circuit board (9); and the circuit sub-board (6) is provided with a remote signal interface (4); A signal collection line (31) is connected between the current sensor (13) and the sampling interface (9e), a drive signal line (27) is connected between the DC electromagnet (21) and the electromagnetic drive port (9f), a remote signal line (28) is connected between the remote signal interface (4) and the remote signal drive port (9g), and a DC power line (30) is connected between the button battery (29) and the battery interface (9h); The circuit sub-board (6) is mounted on the sub-board frame (18), and the sub-board frame (18) is inserted at the lower front side of the snap-fit ​​housing (1). A snap-fitting protrusion (32) is provided above the sub-board frame (18), and a snap-fitting circular pit (33) is provided inside the snap-fit ​​housing (1) corresponding to the position of the snap-fitting protrusion (32).

2. The automatic gate discharge lightning protection backup protector according to claim 1 is characterized in that: The snap-fit ​​shell (1) is divided into two half shells, a left half shell and a right half shell. A fixing rivet (10) is provided between the half shells of the snap-fit ​​shell (1). A mounting clamp (11) is provided at the lower rear side of the snap-fit ​​shell (1).

3. The automatic gated discharge lightning protection backup protector according to claim 1 is characterized in that: The front upper layer of the buckled shell (1) is provided with an inlet screw hole (2), and an inlet screw (22) is arranged in the inlet screw hole (2); the rear upper layer of the buckled shell (1) is provided with an outlet screw hole (14), and an outlet screw (24) is arranged in the outlet screw hole (14).

4. The automatic gated discharge lightning protection backup protector according to claim 1 is characterized in that: An inlet port (3) is provided below the front end of the snap-fit ​​housing (1), an inlet terminal (23) is provided inside the inlet port (3), and an outlet port (12) is provided below the rear end of the snap-fit ​​housing (1), an outlet terminal (25) is provided inside the outlet port (12).

5. The automatic gated discharge lightning protection backup protector according to claim 1 is characterized in that: The microprocessor (9a) is connected to the output circuit of the detection circuit (9b), the microprocessor (9a) is connected to the drive circuit (9d), and the drive circuit (9d) is respectively connected to the electromagnetic drive port (9f) and the remote signal drive port (9g).

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