CN211528534U

CN211528534U - Integrated residual current detector

Info

Publication number: CN211528534U
Application number: CN201922177915.0U
Authority: CN
Inventors: 高乃杰; 何培重
Original assignee: Guangzhou Liurui Firefighting Technology Co ltd
Current assignee: Guangzhou Liurui Firefighting Technology Co ltd
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2020-09-18
Anticipated expiration: 2029-12-06

Abstract

The utility model discloses an integrated residual current detector, which comprises a shell, a current transformer, an information processing module and a power supply; the current transformer and the information processing module are fixedly arranged in the shell; the middle part of the shell is provided with a shell through hole; the current transformer is arranged around the through hole of the shell; the information processing module comprises a circuit board, an alarm and a microprocessor; the alarm is electrically connected with the microprocessor through the circuit board; the current transformer is electrically connected with the microprocessor through the circuit board; the current transformer, the microprocessor and the alarm are electrically connected with the power supply through circuit boards respectively. The utility model discloses it is big to effectively avoid current residual current detector occupation space, and the complicated scheduling problem of wiring reduces residual current detector's volume, utilizes the integral type structure to remove the step of wiring from, improves the installation effectiveness.

Description

Integrated residual current detector

Technical Field

The utility model relates to a residual current detector, concretely relates to integral type residual current detector.

Background

An electrical fire generally refers to a fire caused by the thermal energy released due to the fault of the electrical lines, electrical equipment, appliances and power supply and distribution equipment, such as high temperature, electric arc, electric spark, etc., and the energy released due to the non-fault, such as hot surface of the electric heating appliance, ignition of the body or other combustible materials under combustion conditions, and also includes a fire caused by lightning and static electricity.

A phenomenon called leakage occurs in which the insulation of the wire or the insulation of the material of the bracket is reduced at a certain place of the line due to some reason (natural or artificial), and a part of current flows between the wire and between the wire and the ground. When the leaked current flows into the ground, if the current meets a part with larger resistance, local high temperature is generated, and nearby combustible materials are ignited, thereby causing fire. In addition, a leakage spark generated at a leakage point also causes a fire. A fire caused by leakage is one of the electrical fires.

The residual current detector is used for detecting whether the power distribution loop has the electric leakage condition or not, and rapidly giving an alarm when the electric leakage value reaches a preset alarm point so as to prompt a worker to take measures to process in time. The equipment comprises an information processor and a mutual inductor, most of residual current detectors in the current market are split residual current detectors, namely the information processor and the mutual inductor are separated, and under the condition, the information processor and the mutual inductor are required to be respectively installed and fixed, so that the occupied space is large, and the cost is high; and when a plurality of residual current detectors need to be applied on site, the problem of wrong connection due to excessive wiring is easy to occur, and faults are easy to occur during operation and maintenance.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an integral type residual current detector, it is big to solve current residual current detector occupation space, and the complicated scheduling problem of wiring reduces residual current detector's volume, utilizes the integral type structure to remove the step of wiring from, improves the installation effectiveness, facilitates the utilization.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an integrated residual current detector comprises a shell, a current transformer, an information processing module and a power supply; the current transformer and the information processing module are fixedly arranged in the shell; a shell through hole is formed in the middle of the shell and is used for allowing a cable to pass through; the current transformer is arranged around the through hole of the shell; the information processing module comprises a circuit board, an alarm and a microprocessor; the alarm is electrically connected with the microprocessor through the circuit board; the current transformer is electrically connected with the microprocessor through the circuit board; the current transformer, the microprocessor and the alarm are respectively electrically connected with the power supply through the circuit board.

Furthermore, the shell comprises an upper cover and a lower cover, wherein the middle parts of the upper cover and the lower cover are respectively provided with an upper cover through hole and a lower cover through hole which correspond to each other in position, and the upper cover through hole and the lower cover through hole are combined to form the shell through hole; on the inner surfaces of the upper cover and the lower cover, limiting bulges are arranged around the peripheries of the upper cover through hole and the lower cover through hole, and the positions of the limiting bulges of the upper cover through hole and the lower cover through hole are corresponding and have the same size; the inner surfaces of the upper cover and the lower cover are respectively provided with outer ring limiting bulges corresponding to the positions, the outer ring limiting bulges surround the limiting bulges, intervals exist between the limiting bulges and the outer ring limiting bulges, and the intervals are used for placing the current transformer.

Furthermore, the upper parts of the inner surfaces of the upper cover and the lower cover are symmetrically provided with transverse grooves, the transverse grooves are matched with the circuit board, and the left side and the right side of the circuit board are clamped into the transverse grooves of the upper cover and the lower cover so as to fix the position of the circuit board.

Furthermore, the upper cover and the lower cover are fixedly connected through screws, the manufacturing technology is mature, and the installation is easy.

The beneficial effects of the utility model reside in that: can effectively avoid current residual current detector occupation space big, the complicated scheduling problem of wiring reduces residual current detector's volume, utilizes the integral type structure to remove the step of wiring from, improves the installation effectiveness, has just combined current transformer, microprocessor and alarm simultaneously in small and exquisite volume, realizes the effective effect of control residual current when reducing occupation space, facilitates the utilization.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic structural view of an upper cover and a circuit board in an embodiment of the present invention;

fig. 3 is a schematic structural view of the lower cover and the circuit board in the embodiment of the present invention;

fig. 4 is a schematic diagram of the main circuit connection according to the embodiment of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings, and it should be noted that the following embodiments are based on the technical solution, and the detailed embodiments and the specific operation processes are provided, but the protection scope of the present invention is not limited to the embodiments.

As shown in fig. 1-4, an integrated residual current detector comprises a housing 1, a current transformer 2, an information processing module and a power supply 6; the current transformer 2 and the information processing module are fixedly arranged inside the shell 1; a shell through hole 11 is formed in the middle of the shell 1, and the shell through hole 11 is used for allowing a cable to pass through; the current transformer 2 is arranged around the shell through hole 11; the information processing module comprises a circuit board 4, an alarm 3 and a microprocessor 5; the alarm 3 is electrically connected with the microprocessor 5 through the circuit board 4; the current transformer 2 is electrically connected with the microprocessor 5 through the circuit board 4; the current transformer 2, the microprocessor 5 and the alarm 3 are respectively electrically connected with the power supply 6 through the circuit board 4.

According to the integrated residual current detector, the cable of the detection point penetrates through the shell through hole 11, when the cable is in a power-on operation process, the current transformer 2 receives residual current larger than a residual current standard value set in the microprocessor 5, the signal is transmitted to the microprocessor 5 through the circuit board 4, the microprocessor 5 receives current detection information and then transmits the information to the main control circuit, an operator controls the main control circuit 8 to perform corresponding operations such as circuit breaking on the circuit of the detection point, and meanwhile the microprocessor 5 can control the alarm 3 to give an alarm to prompt the situation of residual current of the operator. Integral type residual current detector small in size, simple structure combines current transformer 2 and microprocessor 5 and alarm 3, can just place in the cable department that needs detected the residual current when the cable sets up to the residual current that produces among the control cable operation process, in case cause the production of electric fire because of the residual current is too big, need not the wiring, simple to operate.

The power supply 6 is directly installed in the integrated residual current detector, the microprocessor 5, the current transformer 2 and the alarm 3 can be directly powered on, and other external power supplies 6 are not needed, so that the integrated residual current detector is convenient to install.

In the present embodiment, the current transformer 2 may use an LMK-0.5S type or the like.

Further, the housing 1 comprises an upper cover 12 and a lower cover 13, the middle parts of the upper cover 12 and the lower cover 13 are respectively provided with an upper cover 12 through hole and a lower cover 13 through hole which are corresponding in position, and the upper cover 12 through hole and the lower cover 13 through hole are combined to form the housing through hole 11; on the inner surfaces of the upper cover 12 and the lower cover 13, limiting bulges 14 are arranged around the peripheries of the through hole of the upper cover 12 and the through hole of the lower cover 13, and the positions of the limiting bulges 14 of the through hole of the upper cover 12 and the through hole of the lower cover 13 are corresponding and have the same size; the inner surfaces of the upper cover 12 and the lower cover 13 are respectively provided with an outer ring limiting bulge 15 corresponding in position, the outer ring limiting bulge 15 surrounds the limiting bulge 14, a gap exists between the limiting bulge 14 and the outer ring limiting bulge 15, and the gap is used for placing the current transformer 2. The current transformer 2 is fixed in position through the limiting bulge 14.

Furthermore, the upper parts of the upper cover 12 and the lower cover 13 are symmetrically provided with transverse grooves 16, the transverse grooves 16 are matched with the circuit board 4, and the left side and the right side of the circuit board 4 are clamped into the transverse grooves 16 of the upper cover 12 and the lower cover 13 so as to fix the position of the circuit board 4.

Furthermore, the upper cover 12 and the lower cover 13 are fixedly connected through the screws 7, so that the manufacturing technology is mature and the installation is easy.

Examples

The cable of the detection point penetrates through the through hole of the shell, the integrated residual current detector is preassembled at the through hole, when the cable is in a power-on operation process, the current transformer detects residual current reaching a set value, a signal is transmitted to the microprocessor through the circuit board, the microprocessor receives current detection information and then transmits the information to the main control circuit, an operator controls the main control circuit to perform corresponding operations such as circuit breaking and the like on the circuit of the detection point, and meanwhile, the microprocessor controls the alarm to give an alarm to prompt the operator of the residual current.

Various corresponding changes and modifications can be made by those skilled in the art according to the above technical solutions and concepts, and all such changes and modifications should be included in the protection scope of the present invention.

Claims

1. An integrated residual current detector comprises a shell, a current transformer, an information processing module and a power supply; the current transformer and the information processing module are fixedly arranged in the shell; a shell through hole is formed in the middle of the shell and is used for allowing a cable to pass through; the current transformer is arranged around the through hole of the shell; the information processing module comprises a circuit board, an alarm and a microprocessor; the alarm is electrically connected with the microprocessor through the circuit board; the current transformer is electrically connected with the microprocessor through the circuit board; the current transformer, the microprocessor and the alarm are respectively electrically connected with the power supply through the circuit board.

2. The integrated residual current detector as claimed in claim 1, wherein the housing comprises an upper cover and a lower cover, the middle parts of the upper cover and the lower cover are respectively provided with an upper cover through hole and a lower cover through hole, the upper cover through hole and the lower cover through hole are correspondingly arranged, and the upper cover through hole and the lower cover through hole are combined to form the housing through hole.

3. The integrated residual current detector as claimed in claim 2, wherein the inner surfaces of the upper cover and the lower cover are provided with limiting protrusions around the peripheries of the upper cover through hole and the lower cover through hole, and the limiting protrusions of the upper cover through hole and the lower cover through hole are corresponding in position and consistent in size; the inner surfaces of the upper cover and the lower cover are respectively provided with outer ring limiting bulges corresponding to the positions, the outer ring limiting bulges surround the limiting bulges, intervals exist between the limiting bulges and the outer ring limiting bulges, and the current transformer is arranged in the intervals.

4. The integrated residual current detector as claimed in claim 2, wherein the upper portions of the inner surfaces of the upper cover and the lower cover are symmetrically provided with transverse grooves, the transverse grooves are matched with a circuit board, and the left side and the right side of the circuit board are clamped into the transverse grooves of the upper cover and the lower cover.

5. The integrated residual current detector of claim 2, wherein the upper cover and the lower cover are fixedly connected through screws.