Residual current detection module

Abstract

The utility model discloses a residual current detection module which comprises an outer shell, a detection assembly is arranged in the outer shell, a cover plate is arranged at the bottom of the outer shell, the detection assembly comprises a framework, and a first clamping groove is formed in the framework; a first main loop is arranged in the first clamping groove, the first main loop and the first clamping groove are mutually embedded, a first placing platform is arranged on the surface of the framework, and a second placing platform is arranged on the lower portion of the first placing platform. According to the utility model, the two transformers are both arranged on the framework, and the circuit board is also integrated on the framework, so that the interior is an integral assembly, and the current transformers are eccentrically wound, so that the space can be saved, the miniaturization of products is realized, the detection assembly is arranged in the outer shell and is filled with glue, the stability and firmness of the products are good, and the auxiliary current transformer is wrapped by the shielding cover. Therefore, most external electromagnetic interference can be counteracted, and the accuracy and anti-interference performance of leakage current detection are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of current detection, and more specifically to a residual current detection module. Background Art

[0002] The RCD residual current protection module is a device used to detect the magnitude of leakage current in the circuit. If such a module device is not installed in the circuit, in simple terms, when a person or animal comes into contact with high voltage, a leakage current will be generated to the ground. When the leakage current exceeds a certain threshold, it will cause the heart of the person or animal to fibrillate, causing cardiac arrest, and then cause suffocation of the person or animal, causing life-threatening danger. If a leakage detection device such as RCD is installed in the circuit, when there is leakage current in the circuit and the magnitude of the leakage current exceeds the set threshold, it will send an alarm signal to the action mechanism, triggering the action mechanism to quickly disconnect the circuit to achieve the purpose of protecting life safety.

[0003] At present, most of the RCD module products with metering function are structured as a separate structure with two parts, upper and lower parts, and have no electromagnetic interference shielding function. Therefore, a new technical solution is needed to solve the problem. Utility Model Content

[0004] The utility model aims to provide a residual current detection module, which solves the problem that most of the current RCD module products with metering function are structured as a separate structure composed of upper and lower parts and have no electromagnetic interference shielding function.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a residual current detection module, comprising: an outer shell, a detection component is arranged inside the outer shell and a cover is arranged at the bottom, the detection component comprises a frame and a first card slot is arranged inside the frame, a first main circuit is arranged inside the first card slot and the first main circuit and the first card slot are mutually embedded, a first placement platform is arranged on the surface of the frame and a second placement platform is arranged at the lower part of the first placement platform, a main current transformer is arranged on the surface of the first placement platform and an auxiliary current transformer is arranged on the surface of the second placement platform, shielding covers are arranged on both the upper and lower sides of the auxiliary current transformer, a metal cold plug pin is arranged on the side of the frame and the leads of the main current transformer and the auxiliary current transformer are wound and welded on its surface, a circuit board is arranged on the side of the frame and a welding hole is arranged inside the circuit board, the metal cold plug pin is plugged into the welding hole and welded to it, a pin is arranged on the side of the circuit board and a mounting hole is arranged inside the cover, the pin extends to the outside of the mounting hole, a first buckle and a mounting pipe are arranged on the surface of the outer shell, and a second main circuit is arranged inside the first buckle and the mounting pipe.

[0006] As a preferred embodiment of the present invention, the surface of the second placement platform is provided with isolation columns.

[0007] As a preferred embodiment of the present invention, a second card slot is provided at the bottom of the outer shell and second buckles are provided around the cover plate, and the second card slot and the second buckle are interlocked.

[0008] As a preferred embodiment of the present utility model, a limiting groove is arranged inside the outer shell, and the limiting groove and the first main circuit are interlocked.

[0009] As a preferred embodiment of the utility model, two groups of fixing holes are arranged inside the cover plate, and fixing holes are passed through one end of the first main circuit and the second main circuit.

[0010] As a preferred embodiment of the present invention, a protrusion is provided on the inner surface of the cover plate and the protrusion is located between the two groups of fixing holes.

[0011] As a preferred embodiment of the present utility model, the frame is a hollow structure and passes through the extension end of the installation pipe of the outer shell during installation.

[0012] As a preferred implementation manner of the utility model, the internal coils of the main current transformer and the auxiliary current transformer are both eccentrically wound.

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

[0014] The utility model installs the first main circuit into the first card slot of the frame, installs the main current transformer into the first placement platform above the frame, fixes the main current transformer by glue, installs the shielding cover on the auxiliary current transformer and installs it into the placement platform below the frame, fixes it by glue, wraps and welds the outlet ends of the two transformer coils to the metal cold plug pins of the frame, and welds the circuit board to the metal cold plug pins of the frame. After the parts are assembled, an assembly is formed. The components are installed in the outer shell, and glue is poured into the outer shell to fix it. The cover plate is covered before the glue solidifies. The second main circuit is installed in the outer shell through the installation pipe in the outer shell to obtain the finished product. Since the transformer outlet is wound around the metal pin of the bakelite frame, semi-automatic welding with a tin furnace can be used to reduce production time and save costs. Both transformers are on the frame, and the circuit board is also assembled on the frame, making the interior an integral component, and the current transformer is still eccentrically wound, so it can save space and realize product miniaturization. The detection component is installed in an outer shell and glue is poured. The product has good stability and firmness. The auxiliary current transformer is wrapped with a shielding cover, so it can offset most of the external electromagnetic interference and improve the accuracy and anti-interference of leakage detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the explosion structure of the monitoring component of the utility model;

[0017] Figure 3 This is a schematic diagram of the skeleton structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the framework of the utility model from another angle;

[0019] Figure 5 This is a schematic diagram of the outer shell structure of the utility model;

[0020] Figure 6 This is a schematic diagram of the structure of the outer shell of the utility model from another angle;

[0021] Figure 7 This is a schematic diagram of the circuit board structure of the utility model;

[0022] Figure 8 This is a schematic diagram of the cover structure of the utility model.

[0023] In the figure: 1. outer shell; 2. detection component; 3. cover plate; 4. second main circuit; 5. main current transformer; 6. frame; 7. first main circuit; 8. shielding cover; 9. auxiliary current transformer; 10. circuit board; 11. metal cold plug pin; 12. first card slot; 13. first placement platform; 14. second placement platform; 15. isolation column; 16. first buckle; 17. limit groove; 18. installation pipe; 19. second card slot; 20. welding hole; 21. pin; 22. installation hole; 23. second buckle; 24. fixing hole; 25. bump. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-8The utility model provides a technical solution: a residual current detection module, comprising: an outer shell 1, a detection component 2 is arranged inside the outer shell 1 and a cover plate 3 is arranged at the bottom, the detection component 2 includes a skeleton 6 and a first card slot 12 is arranged inside the skeleton 6, a first main circuit 7 is arranged inside the first card slot 12 and the first main circuit 7 and the first card slot 12 are mutually embedded, a first placement platform 13 is arranged on the surface of the skeleton 6 and a second placement platform 14 is arranged at the lower part of the first placement platform 13, a main current transformer 5 is arranged on the surface of the first placement platform 13 and an auxiliary current transformer 9 is arranged on the surface of the second placement platform 14, and shielding covers 8 are arranged on both the upper and lower sides of the auxiliary current transformer 9, a metal cold plug pin 11 is arranged on the side of the skeleton 6 and the leads of the main current transformer 5 and the auxiliary current transformer 9 are wound and welded on its surface, and a circuit The board 10 and the circuit board 10 are provided with a welding hole 20 inside, the metal cold plug pin 11 is inserted into the welding hole 20 and welded to it, the side of the circuit board 10 is provided with a pin 21 and the cover plate 3 is provided with a mounting hole 22 inside, the pin 21 extends to the outside of the mounting hole 22, the surface of the outer shell 1 is provided with a first buckle 16 and a mounting pipe 18, the first buckle 16 and the mounting pipe 18 are provided with a second main circuit 4 inside, the first main circuit 7 is installed in the first slot 12 of the skeleton 6, the main current transformer 5 is installed in the first placement platform 13 above the skeleton 6, the main current transformer 5 is fixed by glue, the auxiliary current transformer 9 is installed with the shielding cover 8 and then installed in the placement platform below the skeleton 6, and fixed by glue, the two transformer coil outlet ends are wound and welded to the metal cold plug pin 11 of the skeleton 6, the circuit board 10 is welded to the metal cold plug pin 11 of the skeleton 6, and the components are formed after the parts are assembled. The components are installed in the outer shell 1, and glue is poured into the outer shell 1 to fix it. The cover plate 3 is covered before the glue solidifies. The second main circuit 4 is installed in the outer shell 1 through the installation pipe 18 in the outer shell 1 to obtain a finished product. Since the outlet end of the mutual inductor is wound around the metal pin of the bakelite frame 6, semi-automatic welding with a tin furnace can be used to reduce production time and save costs. Both mutual inductors are on the frame 6, and the circuit board 10 is also assembled on the frame 6, so that the interior is an integral component, and the current mutual inductor is still eccentrically wound, so it can save space and realize product miniaturization. The detection component 2 is installed in an outer shell 1 and glue is poured. The product has good stability and firmness. The auxiliary current mutual inductor 9 is wrapped with a shielding cover 8, so it can offset most of the external electromagnetic interference and improve the accuracy and anti-interference of leakage detection.

[0026] Further improvements, such as Figure 4 As shown: the surface of the second placement platform 14 is provided with an isolation column 15, such a configuration can prevent the first main circuit 7 and the secondary current transformer 9 from contacting each other.

[0027] Further improvements, such as Figure 6 , 8 As shown: a second card slot 19 is provided at the bottom of the outer shell 1 and second buckles 23 are provided around the cover plate 3. The second card slot 19 and the second buckle 23 are engaged with each other. This arrangement ensures the stability of the installation of the outer shell 1.

[0028] Further improvements, such as Figure 6 As shown: a limiting groove 17 is arranged inside the outer shell 1 and the limiting groove 17 and the first main circuit 7 are interlocked with each other. This arrangement ensures the stability of the installation of the first main circuit 7.

[0029] Further improvements, such as Figure 8 As shown: two groups of fixing holes 24 are arranged inside the cover plate 3 and fixing holes 24 are passed through one end of the first main circuit 7 and the second main circuit 4. This arrangement facilitates the first main circuit 7 and the second main circuit 4 to protrude from the cover plate 3.

[0030] Further improvements, such as Figure 8 As shown: the inner surface of the cover plate 3 is provided with a protrusion 25 and the protrusion 25 is located between the two groups of fixing holes 24. This arrangement increases the creepage distance between the main circuits.

[0031] Further improvements, such as Figure 3 , 6 As shown: the frame 6 is a hollow structure and passes through the extended end of the installation pipe 18 of the outer shell 1 during installation. This arrangement reduces the occupied space.

[0032] Further improvements, such as Figure 2 As shown: the internal coils of the main current transformer 5 and the auxiliary current transformer 9 are both eccentrically wound, which can save space and achieve product miniaturization.

[0033] Working principle: install the first main circuit 7 into the first slot 12 of the skeleton 6, install the main current transformer 5 into the first placement platform 13 above the skeleton 6, fix the main current transformer 5 by glue, install the shielding cover 8 on the auxiliary current transformer 9 and then install it into the placement platform below the skeleton 6, fix it by glue, the outlet ends of the two transformer coils are wound and welded to the metal cold plug pins 11 of the skeleton 6, and the circuit board 10 is welded to the metal cold plug pins 11 of the skeleton 6. After the parts are assembled, an assembly is formed. The components are installed in the outer shell 1, and glue is poured into the outer shell 1 to fix it. The cover plate 3 is covered before the glue solidifies. The second main circuit 4 is installed in the outer shell 1 through the installation pipe 18 in the outer shell 1 to obtain a finished product. Since the outlet end of the mutual inductor is wound around the metal pin of the bakelite frame 6, semi-automatic welding with a tin furnace can be used to reduce production time and save costs. Both mutual inductors are on the frame 6, and the circuit board 10 is also assembled on the frame 6, so that the interior is an integral component, and the current mutual inductor is still eccentrically wound, so it can save space and realize product miniaturization. The detection component 2 is installed in an outer shell 1 and glue is poured. The product has good stability and firmness. The auxiliary current mutual inductor 9 is wrapped with a shielding cover 8, so it can offset most of the external electromagnetic interference and improve the accuracy and anti-interference of leakage detection.

[0034] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0035] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, and can be mechanical or electrical connections, or internal connectivity between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may change.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A residual current detection module, characterized in that: include: An outer shell (1), wherein a detection component (2) is arranged inside the outer shell (1) and a cover plate (3) is arranged at the bottom, wherein the detection component (2) comprises a frame (6) and a first card slot (12) is arranged inside the frame (6), wherein a first main circuit (7) is arranged inside the first card slot (12) and the first main circuit (7) and the first card slot (12) are mutually engaged, wherein a first placement platform (13) is arranged on the surface of the frame (6) and a second placement platform (14) is arranged below the first placement platform (13), wherein a main current transformer (5) is arranged on the surface of the first placement platform (13) and an auxiliary current transformer (9) is arranged on the surface of the second placement platform (14), and shielding covers (8) are arranged on both upper and lower sides of the auxiliary current transformer (9) The side of the frame (6) is provided with a metal cold plug pin (11) and the lead wires of the main current transformer (5) and the auxiliary current transformer (9) are wound and welded on the surface thereof; the side of the frame (6) is provided with a circuit board (10) and the inside of the circuit board (10) is provided with a welding hole (20); the metal cold plug pin (11) is inserted into the inside of the welding hole (20) and is welded and fixed thereto; the side of the circuit board (10) is provided with a pin (21) and the inside of the cover plate (3) is provided with a mounting hole (22); the pin (21) extends to the outside of the mounting hole (22); the surface of the outer shell (1) is provided with a first buckle (16) and a mounting pipe (18); the inside of the first buckle (16) and the mounting pipe (18) is provided with a second main circuit (4).

2. A residual current detection module according to claim 1, characterized in that: The surface of the second placement platform (14) is provided with isolation columns (15).

3. A residual current detection module according to claim 1, characterized in that: A second clamping groove (19) is provided at the bottom of the outer shell (1) and second clamping buckles (23) are provided around the cover plate (3), and the second clamping groove (19) and the second clamping buckle (23) are interlocked.

4. A residual current detection module according to claim 1, characterized in that: A limiting groove (17) is provided inside the outer shell (1), and the limiting groove (17) and the first main circuit (7) are interlocked.

5. A residual current detection module according to claim 1, characterized in that: Two groups of fixing holes (24) are arranged inside the cover plate (3), and the fixing holes (24) pass through one end of the first main circuit (7) and the second main circuit (4).

6. A residual current detection module according to claim 1, characterized in that: The inner surface of the cover plate (3) is provided with a protrusion (25), and the protrusion (25) is located between the two groups of fixing holes (24).

7. A residual current detection module according to claim 1, characterized in that: The frame (6) is a hollow structure and passes through the extended end of the installation pipe (18) of the outer shell (1) during installation.

8. A residual current detection module according to claim 1, characterized in that: The internal coils of the main current transformer (5) and the auxiliary current transformer (9) are both eccentrically wound.

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