Active short-circuit protection device

Abstract

The utility model discloses an active short circuit protection device, which comprises a porcelain installation bottom plate, an electric push rod, a PLC controller, an energy storage power supply and a short circuit detector, a knife holder static contact is fixedly installed above the front end of the porcelain installation bottom plate, and a knife switch connecting seat is fixedly installed below the front end of the porcelain installation bottom plate. A supporting frame is fixedly connected to the front end, located on the outer side of the knife switch connecting base, of the porcelain mounting bottom plate, a power supply knife switch is rotationally connected to the knife switch connecting base, and a clamping head is fixedly connected to the side, close to the knife holder static contact, of the power supply knife switch. According to the utility model, through the short circuit detector and the PLC controller, active detection and rapid response to short circuit of a circuit are realized, when the short circuit is detected, a power supply can be automatically cut off, and safety accidents such as equipment damage and fire disasters can be effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of active short-circuit protection devices, in particular to an active short-circuit protection device. Background Art

[0002] A short circuit refers to a low-resistance connection between two or more wires in a circuit, causing current to flow directly through this connection, bypassing the original circuit path, thereby causing the circuit to lose its normal function. There are two main types of short circuits: power supply short circuit and electrical appliance short circuit.

[0003] When a circuit is short-circuited, the current will increase sharply, potentially generating tens of thousands or even hundreds of thousands of amperes of current, causing equipment damage or even fire. Therefore, an active short-circuit protection device is urgently needed to solve the above problem. Utility Model Content

[0004] The purpose of the present invention is to provide an active short-circuit protection device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an active short-circuit protection device, comprising a porcelain mounting base plate, an electric push rod, a PLC controller, an energy storage power supply and a short-circuit detector, a knife holder static contact fixedly mounted above the front end of the porcelain mounting base plate, a knife connection seat fixedly mounted below the front end of the porcelain mounting base plate, the front end of the porcelain mounting base plate is located on the outside of the knife connection seat and is fixedly connected to a support frame, a power knife is rotatably connected to the knife connection seat, a card joint is fixedly connected to the side of the power knife close to the knife holder static contact, an arc-shaped limit rod is fixedly mounted on the middle part of the side of the support frame close to the power knife, and an energy storage spring is nested on the outside of the arc-shaped limit rod.

[0006] Preferably, a first clamping portion and a second clamping portion are fixedly connected above the front end of the porcelain mounting base plate, the first clamping portion and the second clamping portion are symmetrically arranged on both sides of the static contact of the knife holder, the electric push rod is fixedly installed on the first clamping portion, and the driving end of the electric push rod is fixedly connected to a plug-in fixing rod.

[0007] Preferably, one end of the energy storage spring is fixedly mounted on a side of the support frame close to the power switch, and the other end of the energy storage spring is fixedly mounted on a side of the power switch away from the card connector.

[0008] Preferably, a connecting transverse plate is fixedly connected between the first clamping portion and the second clamping portion, and the connecting transverse plate is located outside the static contact of the knife holder.

[0009] Preferably, the PLC controller, the energy storage power supply and the short-circuit detector are respectively fixedly mounted on the front end of the porcelain mounting base plate, the PLC controller is respectively electrically connected to the electric push rod and the short-circuit detector by wire, and the energy storage power supply is respectively electrically connected to the electric push rod and the PLC controller by wire.

[0010] Preferably, the short-circuit detector is electrically connected to the knife connection seat via a wire, and the blade portion of the power knife is movably connected to the static contact of the knife seat.

[0011] Preferably, the arc-shaped limit rod is fixedly connected to the connecting horizontal plate at one end away from the support frame, the arc-shaped limit rod is slidably connected to the handle end of the power switch, and the arc-shaped limit rod is located on the side of the card connector close to the blade end of the power switch.

[0012] Preferably, one end of the plug-in fixing rod close to the electric push rod is movably inserted into the inner side of the first clamping part, one end of the plug-in fixing rod close to the second clamping part is movably inserted into the inner side of the second clamping part, and the plug-in fixing rod is movably inserted into the inner side of the clamping joint.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] The utility model realizes active detection and rapid response to circuit short circuits through the short circuit detector and the PLC controller. When a short circuit is detected, the power supply can be automatically cut off, effectively preventing the occurrence of safety accidents such as equipment damage and fire. At the same time, the energy storage power supply provides power to the electric push rod and the PLC controller, ensuring that when the external power supply is interrupted due to a short circuit, the protection device can still work normally, thereby improving the reliability and safety of the system. Through the cooperation of the electric push rod and the plug-in fixing rod, the mechanical locking of the power switch is realized to ensure the stability of the circuit connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main three-dimensional structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the second state structure of the main body of the present utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the porcelain installation base plate in the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the porcelain installation base plate in the present invention.

[0019] In the figure: 1-porcelain mounting base, 2-electric push rod, 3-PLC controller, 4-energy storage power supply, 5-short circuit detector, 6-knife holder static contact, 7-knife switch connecting seat, 8-first clamping part, 9-connecting horizontal plate, 10-plug-in fixing rod, 11-second clamping part, 12-arc limit rod, 13-energy storage spring, 14-support frame, 15-power switch, 16-card connector. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-4 The utility model provides an embodiment: an active short-circuit protection device, including a porcelain mounting base 1, an electric push rod 2, a PLC controller 3, an energy storage power supply 4 and a short-circuit detector 5, a knife holder static contact 6 is fixedly installed on the upper front end of the porcelain mounting base 1, a knife connection seat 7 is fixedly installed on the lower front end of the porcelain mounting base 1, the front end of the porcelain mounting base 1 is located on the outside of the knife connection seat 7 and is fixedly connected to a support frame 14, a power knife 15 is rotatably connected to the knife connection seat 7, a card joint 16 is fixedly connected to the side of the power knife 15 close to the knife holder static contact 6, an arc-shaped limit rod 12 is fixedly installed in the middle of the side of the support frame 14 close to the power knife 15, and an energy storage spring 13 is nested on the outside of the arc-shaped limit rod 12.

[0022] A first clamping portion 8 and a second clamping portion 11 are fixedly connected to the upper front end of the porcelain mounting base plate 1. The first clamping portion 8 and the second clamping portion 11 are symmetrically arranged on both sides of the tool holder static contact 6. The electric push rod 2 is fixedly mounted on the first clamping portion 8. The driving end of the electric push rod 2 is fixedly connected to a plug-in fixing rod 10. A connecting cross plate 9 is fixedly connected between the first clamping portion 8 and the second clamping portion 11. The connecting cross plate 9 is located on the outside of the tool holder static contact 6.

[0023] The PLC controller 3, energy storage power supply 4 and short-circuit detector 5 are respectively fixedly installed on the front end of the porcelain mounting base plate 1. The PLC controller 3 is respectively electrically connected to the electric push rod 2 and the short-circuit detector 5 by wires. The short-circuit detector 5 detects the short circuit of the circuit and transmits the short-circuit information to the PLC controller 3. The PLC controller 3 receives the short-circuit signal to control the contraction of the electric push rod 2. The energy storage power supply 4 is respectively electrically connected to the electric push rod 2 and the PLC controller 3 by wires. The energy storage power supply 4 provides electrical energy to avoid loss of power due to short circuit.

[0024] One end of the arc-shaped limit rod 12 away from the support frame 14 is fixedly connected to the connecting cross plate 9, and the arc-shaped limit rod 12 is slidably connected to the handle end of the power switch 15, and the arc-shaped limit rod 12 is located on the side of the card joint 16 close to the blade end of the power switch 15. The handle end of the power switch 15 is limited by the arc-shaped limit rod 12 to prevent the power switch 15 from deflecting. One end of the energy storage spring 13 is fixedly installed on the side of the support frame 14 close to the power switch 15, and the other end of the energy storage spring 13 is fixedly installed on the side of the power switch 15 away from the card joint 16. The short-circuit detector 5 and the switch connecting seat 7 are electrically connected by wire. The blade part of the power switch 15 is movably connected to the static contact 6 of the knife seat. When the power switch 15 is connected to the static contact 6 of the knife seat, the power switch 15 pulls the energy storage spring 13 to stretch and store elastic potential energy.

[0025] One end of the plug-in fixing rod 10 close to the electric push rod 2 is movably plugged into the inner side of the first clamping part 8, and one end of the plug-in fixing rod 10 close to the second clamping part 11 is movably plugged into the inner side of the second clamping part 11, and the plug-in fixing rod 10 is movably plugged into the inner side of the clamping joint 16. When the power switch 15 is rotated on the switch connection seat 7 and clamped on the knife holder static contact 6, the electric push rod 2 is extended by the PLC controller 3, and the driving end of the electric push rod 2 pushes the plug-in fixing rod 10 to move and insert into the interior of the clamping joint 16, until the plug-in fixing rod 10 passes through the clamping joint 16 and is plugged into the inner side of the second clamping part 11, the power switch 15 can be fixed on the knife holder static contact 6.

[0026] Working principle: When in use, first connect the external power supply to the static contact 6 of the knife holder, and the internal power supply to the knife connection seat 7, then install the fully charged energy storage power supply 4 on the porcelain mounting base 1, and then power the electric push rod 2 and the PLC controller 3 through the energy storage power supply 4, and then set the control program for the PLC controller 3, and then push the power switch 15 through external force, and the power switch 15 rotates on the knife connection seat 7 close to the static contact 6 of the knife holder. The movement of the power switch 15 pulls the energy storage spring 13 to stretch and store elastic potential energy, until the blade part of the power switch 15 is clamped on the static contact 6 of the knife holder to connect the power supply, and then the electric push rod 2 is controlled to stretch through the PLC controller 3, and the driving end of the electric push rod 2 pushes the plug-in fixing rod 10 to move and insert it into the card joint. 16, until the plug-in fixing rod 10 passes through the card connector 16 and is plugged into the inner side of the second card connector 11, and then the force applied to the power switch 15 is removed. At this time, the power is connected. When a short circuit occurs in the internal circuit, the short-circuit detector 5 detects the circuit short circuit and transmits the signal to the PLC controller 3. The PLC controller 3 receives the signal to control the electric push rod 2 to retract. The driving end of the electric push rod 2 drives the plug-in fixing rod 10 to move closer to the first card connector 8, until the plug-in fixing rod 10 completely leaves the inside of the card connector 16. At this time, the power switch 15 loses the clamping of the plug-in fixing rod 10, and the energy storage spring 13 loses traction, releases elastic potential energy and begins to shrink. The contraction of the energy storage spring 13 drives the power switch 15 to rotate on the switch connection seat 7 away from the knife seat static contact 6 to disconnect the power.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An active short-circuit protection device, comprising a porcelain mounting base plate (1), an electric push rod (2), a PLC controller (3), an energy storage power supply (4) and a short-circuit detector (5), characterized in that: A knife seat static contact (6) is fixedly installed above the front end of the porcelain mounting base (1), a knife connection seat (7) is fixedly installed below the front end of the porcelain mounting base (1), the front end of the porcelain mounting base (1) is located outside the knife connection seat (7) and is fixedly connected to a support frame (14), a power knife (15) is rotatably connected to the knife connection seat (7), a card connector (16) is fixedly connected to the side of the power knife (15) close to the knife seat static contact (6), an arc-shaped limiting rod (12) is fixedly installed in the middle of the side of the support frame (14) close to the power knife (15), and an energy storage spring (13) is nested on the outside of the arc-shaped limiting rod (12).

2. The active short-circuit protection device according to claim 1, characterized in that: A first clamping portion (8) and a second clamping portion (11) are fixedly connected above the front end of the porcelain mounting base plate (1); the first clamping portion (8) and the second clamping portion (11) are symmetrically arranged on both sides of the knife seat static contact (6); the electric push rod (2) is fixedly mounted on the first clamping portion (8); and a drive end of the electric push rod (2) is fixedly connected to a plug-in fixing rod (10).

3. The active short-circuit protection device according to claim 2, characterized in that: One end of the energy storage spring (13) is fixedly mounted on a side of the support frame (14) close to the power switch (15), and the other end of the energy storage spring (13) is fixedly mounted on a side of the power switch (15) away from the card connector (16).

4. The active short-circuit protection device according to claim 2, characterized in that: A connecting transverse plate (9) is fixedly connected between the first clamping portion (8) and the second clamping portion (11), and the connecting transverse plate (9) is located outside the blade holder static contact (6).

5. The active short-circuit protection device according to claim 1, characterized in that: The PLC controller (3), the energy storage power supply (4) and the short-circuit detector (5) are respectively fixedly mounted on the front end of the porcelain mounting base plate (1); the PLC controller (3) is respectively electrically connected to the electric push rod (2) and the short-circuit detector (5); and the energy storage power supply (4) is respectively electrically connected to the electric push rod (2) and the PLC controller (3).

6. The active short-circuit protection device according to claim 1, characterized in that: The short-circuit detector (5) and the knife connection seat (7) are electrically connected by wire, and the blade portion of the power knife (15) is movably connected to the knife seat static contact (6).

7. The active short-circuit protection device according to claim 4, characterized in that: One end of the arc-shaped limiting rod (12) away from the support frame (14) is fixedly connected to the connecting horizontal plate (9), the arc-shaped limiting rod (12) is slidably connected to the handle end of the power switch (15), and the arc-shaped limiting rod (12) is located on a side of the card connector (16) close to the blade end of the power switch (15).

8. The active short-circuit protection device according to claim 3, characterized in that: One end of the plug-in fixing rod (10) close to the electric push rod (2) is movably plugged into the inner side of the first clamping portion (8), and one end of the plug-in fixing rod (10) close to the second clamping portion (11) is movably plugged into the inner side of the second clamping portion (11), and the plug-in fixing rod (10) is movably plugged into the inner side of the clamping joint (16).

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