An electric leakage protector

Abstract

The application belongs to the technical field of electrical devices, and discloses a leakage protector, which comprises a leakage protector main body, and the connection mode of a wire inlet hole of the leakage protector main body and a wire fixing device is detachable fixed connection, the wire fixing device is provided with an inner cylinder, a sealing push plate capable of moving left and right along the inner cylinder and being fixed at a proper position is sleeved on the inner cylinder, at least three air blowing long holes are arranged on the right side of the inner cylinder of the sealing push plate, and the air blowing long holes are sealed through a rubber elastic film; the leakage protector has the beneficial effects that the wire is fixed firmly and cannot be damaged, the pulling resistance of the wire can be adjusted, when the wire is separated from the wire fixing device, a flexible insulation sleeve can clamp the exposed end of the wire, and the like.

Description

Technical Field

[0001] This invention belongs to the field of electrical equipment technology, and in particular discloses a leakage current protection device. Background Technology

[0002] A residual current device (RCD), also known as a residual current circuit breaker, is mainly used to protect equipment from leakage faults and to protect people from fatal electric shocks. It has overload and short circuit protection functions and can be used to protect circuits or motors from overload and short circuits. It can also be used for infrequent switching and starting of circuits under normal conditions.

[0003] In the prior art, CN120527201A discloses a leakage current protection device that is easy to install and safe for electricity use. It includes a leakage current protection device body. The top outer side of the leakage current protection device body has multiple inlet holes for connecting wires. The top and bottom of the inlet holes are fixed with a binding mechanism. The binding mechanism includes a support plate. One end of the support plate has two connecting rods that rotate, and a rubber wheel rotates between the two connecting rods.

[0004] The aforementioned prior art has the following drawbacks: 1. The binding mechanism uses a connecting rod and a rubber wheel for clamping and fixing. When the wire is pulled outward, the rubber wheel squeezes the wire. Due to the small contact area between the rubber wheel and the wire and the lack of elasticity, the wire is easily deformed and damaged; 2. When the wire is subjected to a large pulling force and comes out of the binding mechanism, the exposed conductor is prone to electric shock and other safety accidents. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to disclose a leakage current protector, which is implemented using the following technical solution.

[0006] A residual current device (RCD) includes an RCD body, and the upper side of the RCD body is provided with a plurality of inlet holes for connecting wires. The inlet hole is equipped with a wire fixing device, and the connection between the inlet hole and the wire fixing device is a detachable fixed connection. The left side of the wire fixing device has a knob cavity with an opening to the left, and the right side of the wire fixing device has a wire through hole that runs through both sides. The middle of the knob cavity has an inner cylinder, the right end of which is fixed to the right wall of the knob cavity. The inner cavity of the inner cylinder is coaxially connected to the wire through hole. A sealing push plate is fitted on the inner cylinder. The air in the knob cavity on the right side of the sealing push plate is sealed. The sealing push plate can move left and right along the inner cylinder and be fixed in a suitable position. At least three air-blowing elongated holes are provided on the inner cylinder on the right side of the sealing push plate. The air-blowing elongated holes are evenly distributed around the axis of the inner cylinder and are sealed by a rubber elastic membrane. The right end of the wire hole is also provided with a sleeve opening, which is coaxial with the wire hole. A flexible insulating sleeve is fitted on the sleeve opening. One end of the flexible insulating sleeve is provided with an elastic hoop, which clamps the sleeve opening. The flexible insulating sleeve is located inside the wire hole. After installation, the length of the flexible insulating sleeve is greater than the length from the left end of the wire to the right end of the inner cylinder.

[0007] In the aforementioned leakage current protection device, the rubber elastic diaphragm located on one side of the inner cavity of the inner cylinder has a rough surface.

[0008] The aforementioned leakage current protector has an external thread on the left outer wall of the inner cylinder, a cylindrical knob inside the knob cavity, an internal thread on the inner wall of the cylindrical knob, and the right end of the cylindrical knob is rotatably connected to a sealing push plate. The internal and external threads mesh, the sealing push plate seals with the inner cylinder, and the sealing push plate seals with the inner wall of the knob cavity.

[0009] The aforementioned leakage current protection device has a cylindrical knob with limiting stripes on its outer wall arranged along the axis of the cylindrical knob, and a limiting pin that can move up and down on the lower side wall of the knob cavity. The upper end of the limiting pin can be inserted into the gap between adjacent limiting stripes.

[0010] The aforementioned leakage current protector has a fixed groove on the right side of the inlet hole. When the inlet hole and the wire fixing device are fixedly connected, the upper end of the limiting pin is inserted into the gap between adjacent limiting stripes, the limiting pin is located in the fixed groove, and the lower end of the limiting pin abuts against the bottom of the fixed groove.

[0011] The aforementioned leakage current protector has a limiting block inside the knob cavity, which is located between the external thread and the venting hole on the side closer to the venting hole.

[0012] The aforementioned leakage current protection device has an inner cavity with the same inner diameter as the wire through hole.

[0013] In the aforementioned residual current device, after the elastic clamp is disengaged from the sleeve, the inner diameter of the elastic clamp is smaller than the diameter of the inner conductor of the wire.

[0014] The aforementioned residual current device has a sloped left side wall at the lower end of the limiting pin.

[0015] The aforementioned leakage current protector has an annular groove on the left side wall of the sealing push plate, and an annular slide bar embedded in the annular groove and capable of moving along the annular groove at the right end of the cylindrical knob. Both the annular groove and the annular slide bar are coaxial with the inner cylinder.

[0016] This application has the advantages of securely fixing the wire without damaging the wire insulation layer, adjusting the wire's pull-out resistance, and having a flexible insulating sleeve that can cover the exposed end of the wire when it is detached from the wire fixing device. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the leakage current protector body and the wire fixing device in a separated state according to an embodiment of the present invention.

[0018] Figure 2 This is a three-dimensional structural diagram of the wire fixing device and the wire fixing in accordance with an embodiment of the present invention.

[0019] Figure 3 This is a left view of the wire fixing device and the wire fixing in an embodiment of the present invention.

[0020] Figure 4 This is a right view of the wire fixing device and the wire fixing in accordance with an embodiment of the present invention.

[0021] Figure 5 This is a schematic diagram of the internal three-dimensional structure of the wire fixing device according to an embodiment of the present invention.

[0022] Figure 6 This is a schematic diagram of the internal three-dimensional structure of the wire fixing device according to an embodiment of the present invention after removing the rotating push plug and the flexible insulating sleeve.

[0023] Figure 7 This is a schematic diagram of the internal structure of the wire fixing device and the wire fixing process according to an embodiment of the present invention.

[0024] Figure 8 This is a three-dimensional structural diagram of a partially cut-out rotary pusher according to an embodiment of the present invention.

[0025] In the figure, the corresponding figures are as follows: 1. Main body of residual current device, 13. Inlet hole, 14. Fixing groove, 2. Wire fixing device, 21. Cylindrical knob, 22. Knob cavity, 23. Limiting pin, 24. Inner cylinder, 25. Sealing push plate, 26. Rubber elastic membrane, 28. Limiting block, 210. Internal thread, 211. Sleeve opening, 212. External thread, 3. Wire, 4. Flexible insulating sleeve. Detailed Implementation

[0026] Example: Figures 1 to 8 A residual current device (RCD) includes an RCD body 1, with a plurality of inlet holes 13 for connecting wires 3 on the upper side of the RCD body 1, and a fixing groove 14 on the right side of the inlet holes 13. The wire inlet hole 13 is provided with a wire fixing device 2. The connection between the wire inlet hole 13 and the wire fixing device 2 is a detachable fixing connection. The detachable fixing connection can be a connection method such as pin fixing. The left side of the wire fixing device 2 is provided with a knob cavity 22 with an opening facing left. The right side of the wire fixing device 2 is provided with a wire through hole that runs through both sides. The middle of the knob cavity 22 is provided with an inner cylinder 24. The right end of the inner cylinder 24 is fixed to the right wall of the knob cavity 22. The inner cavity of the inner cylinder 24 is coaxially connected with the wire through hole and has the same inner diameter. The right side of the inner cylinder 24 is provided with four air-blowing long holes. The air-blowing long holes are evenly distributed around the axis of the inner cylinder 24. The air-blowing long holes are sealed by a rubber elastic membrane 26. The rubber elastic membrane 26 has a rough surface on one side of the inner cavity of the inner cylinder 24. The left outer wall of the inner cylinder 24 is provided with an external thread 212. The surface of the inner cylinder 24 between the external thread 212 and the air-blowing long holes is smooth. The inside of the knob cavity 22 is provided with a limiting block 28. The limiting block 28 is located between the external thread 212 and the air-blowing long holes on the side close to the air-blowing long holes. The right end of the wire hole is also provided with a sleeve 211. The sleeve 211 is coaxial with the wire hole. A flexible insulating sleeve 4 is fitted on the sleeve 211. One end of the flexible insulating sleeve 4 is provided with an elastic hoop. The elastic hoop clamps the sleeve 211. The flexible insulating sleeve 4 is located inside the wire hole. After installation, the length of the flexible insulating sleeve 4 is greater than the length from the left end of the wire 3 to the right end of the inner cylinder 24. The knob cavity 22 is provided with a rotary push plug that can move along the axis of the inner cylinder 24. The rotary push plug includes a cylindrical knob 21 and a sealing push plate 25. The outer wall of the cylindrical knob 21 is provided with limiting stripes arranged along the axis of the cylindrical knob 21. The inner wall of the cylindrical knob 21 is provided with an internal thread 210. The sealing push plate 25 is provided with a sleeve hole in the middle. The cylindrical knob 21 is coaxial with the sleeve hole. The right end of the cylindrical knob 21 is rotatably connected to the sealing push plate 25. The cylindrical knob 21 and the sealing push plate 25 are both fitted onto the inner cylinder 24. The internal thread 210 and the internal and external threads 212 mesh. The sealing push plate 25 is fitted onto the inner cylinder 24 between the external thread 212 and the air blasting hole. The sleeve hole of the sealing push plate 25 seals with the inner cylinder 24, and the outer edge of the sealing push plate 25 seals with the inner wall of the knob cavity 22. The lower side wall of the knob cavity 22 is provided with a limiting pin 23 that can move up and down. The upper end of the limiting pin 23 can be inserted into the gap between adjacent limiting stripes. When the wire inlet hole 13 and the wire fixing device 2 are fixedly connected, the upper end of the limiting pin 23 is inserted into the gap between adjacent limiting stripes. The limiting pin 23 is located in the fixing groove 14, and the lower end of the limiting pin 23 abuts against the bottom of the fixing groove 14.

[0027] In the aforementioned residual current device, after the elastic clamp is disengaged from the sleeve 211, the inner diameter of the elastic clamp is smaller than the diameter of the inner conductor of the wire 3.

[0028] In the aforementioned residual current device, to facilitate the entry of the limiting pin 23 into the fixed slide 14, the left side wall of the lower end of the limiting pin 23 is inclined. When the wire fixing device 2 is inserted into the inlet hole 13, the fixed slide 14 can squeeze the inclined surface, thereby pushing the limiting pin 23 to move upward.

[0029] The aforementioned leakage current protection device has an annular groove on the left side wall of the sealing push plate 25, and an annular slide bar embedded in the annular groove and capable of moving along the annular groove at the right end of the cylindrical knob 21. Both the annular groove and the annular slide bar are coaxial with the inner cylinder 24.

[0030] To further prevent air leakage between the sealing push plate 25 and the knob cavity 22, after the wire 3 is fixed by the wire fixing device 2, the gaps in the knob cavity 22 on the left side of the sealing push plate 25 can be sealed by filling with sealant.

[0031] During installation, the elastic ring of the flexible insulating sleeve 4 is clamped around the sleeve opening 211. The other end of the flexible insulating sleeve 4 is bonded to the insulation layer of the wire 3 with strong adhesive. The wire 3 is inserted from the right end of the wire fixing device 2 and exits from the left end. The cylindrical knob 21 is turned to the right, causing the cylindrical knob 21 to push the sealing push plate 25 to the right. The air in the knob cavity 22 on the right side of the sealing push plate 25 is compressed, causing the rubber elastic membrane 26 to bulge towards the center, fixing the wire 3 and inserting the upper end into the gap between the adjacent limiting stripes. The tightness can be adjusted by the cylindrical knob 21. The left end of the wire 3 is cut to a suitable length, and the insulation layer of the left end of the wire 3 is peeled off to expose the conductor. It is then wound into a loop or other shape for electrical connection. The wire fixing device 2 is inserted into the corresponding inlet hole 13 and fixed. The limiting pin 23 is located in the fixing groove 14. The fixing groove 14 fixes the position of the limiting pin 23, ensuring that the cylindrical knob 21 will not untwist. The left end of the wire 3 is electrically connected to the main body 1 of the leakage current protector.

[0032] This application has the following beneficial effects: 1. When the conductor 3 is pulled, the conductor fixing device 2 can fix the conductor 3.

[0033] 2. Because the rubber elastic membrane 26 is elastic, when the conductor 3 is pulled, the rubber elastic membrane 26 can deform slightly in the direction of the pulling force to prevent the insulation layer of the conductor 3 from being damaged by friction, and can return to its original position after the pulling force is removed.

[0034] 3. The air pressure in the knob cavity 22 on the right side of the sealing push plate 25 is connected, so the rubber elastic membrane 26 can fix the wire 3 in the center of the inner cylinder 24, further protecting the insulation layer of the wire 3.

[0035] 4. When the conductor 3 is subjected to a large tensile force, causing the conductor 3 to detach from the conductor fixing device 2, the flexible insulating sleeve 4 can wrap around the left end of the conductor 3 in the opposite direction, and the elastic hoop wraps around the left end of the conductor 3, so that the left end of the conductor 3 cannot be exposed, ensuring the safety of personnel.

[0036] 5. The flexible insulating sleeve 4 can also prevent moisture from entering through the wire fixing device 2.

[0037] 6. The limiting stripes on the cylindrical knob 21 can not only cooperate with the limiting pin 23 to fix the cylindrical knob 21, but also play a role in preventing slippage and making it easy to rotate the cylindrical knob 21.

[0038] 7. The rubber elastic membrane 26 has extensibility. The greater the air pressure in the knob cavity 22 on the right side of the sealing push plate 25, the greater the squeezing force of the rubber elastic membrane 26 on the wire 3, the larger the contact area between the rubber elastic membrane 26 and the wire 3, and the greater the static friction between the rubber elastic membrane 26 and the wire 3.

[0039] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A residual current device (RCD), comprising an RCD body (1), characterized in that, The upper side of the main body (1) of the leakage current protection device is provided with multiple inlet holes (13) for connecting wires (3); The inlet hole (13) is provided with a wire fixing device (2), and the connection between the inlet hole (13) and the wire fixing device (2) is a detachable fixed connection; The left side of the wire fixing device (2) is provided with a knob cavity (22) with an opening to the left, and the right side of the wire fixing device (2) is provided with a wire through hole that runs through the left and right sides. The middle part of the knob cavity (22) is provided with an inner cylinder (24). The right end of the inner cylinder (24) is fixed to the right wall of the knob cavity (22). The inner cavity of the inner cylinder (24) is coaxially connected with the wire through hole. A sealing push plate (25) is fitted on the inner cylinder (24). The air in the knob cavity (22) on the right side of the sealing push plate (25) is in a sealed state. The sealing push plate (25) can move left and right along the inner cylinder (24) and be fixed in a suitable position. At least three air-blowing elongated holes are provided on the inner cylinder (24) on the right side of the sealing push plate (25), and the air-blowing elongated holes are sealed by a rubber elastic membrane (26); A sleeve (211) is provided at the right end of the wire hole. The sleeve (211) is coaxial with the wire hole. A flexible insulating sleeve (4) is fitted on the sleeve (211). One end of the flexible insulating sleeve (4) is provided with an elastic hoop. The elastic hoop clamps the sleeve (211). The flexible insulating sleeve (4) is located inside the wire hole. After installation, the length of the flexible insulating sleeve (4) is greater than the length from the left end of the wire (3) to the right end of the inner cylinder (24).

2. A residual current device (RCD) according to claim 1, characterized in that, The rubber elastic membrane (26) is located on one side of the inner cavity of the inner cylinder (24) and has a rough surface.

3. A residual current device according to claim 2, characterized in that, The outer wall of the left part of the inner cylinder (24) is provided with an external thread (212). A cylindrical knob (21) is provided in the knob cavity (22). The inner wall of the cylindrical knob (21) is provided with an internal thread (210). The right end of the cylindrical knob (21) is rotatably connected to the sealing push plate (25). The internal thread (210) meshes with the internal and external threads (212). The sealing push plate (25) seals with the inner cylinder (24) and seals with the inner wall of the knob cavity (22).

4. A residual current device according to claim 3, characterized in that, The left side wall of the sealing push plate (25) is provided with an annular groove, and the right end of the cylindrical knob (21) is provided with an annular slide bar that is embedded in the annular groove and can move along the annular groove. Both the annular groove and the annular slide bar are coaxial with the inner cylinder (24).

5. A residual current device according to claim 4, characterized in that, The outer wall of the cylindrical knob (21) is provided with limiting stripes along the axis of the cylindrical knob (21), and the lower side wall of the knob cavity (22) is provided with a limiting pin (23) that can move up and down. The upper end of the limiting pin (23) can be inserted into the gap between adjacent limiting stripes.

6. A residual current device according to claim 5, characterized in that, A fixed groove (14) is provided on the right side of the inlet hole (13). When the inlet hole (13) and the wire fixing device (2) are fixedly connected, the upper end of the limiting pin (23) is inserted into the gap between adjacent limiting stripes. The limiting pin (23) is located in the fixed groove (14), and the lower end of the limiting pin (23) abuts against the bottom of the fixed groove (14).

7. A residual current device according to claim 6, characterized in that, The knob cavity (22) is provided with a limiting block (28), which is located on the side of the external thread (212) and the air blasting hole.

8. A residual current device according to claim 7, characterized in that, After the elastic hoop is disengaged from the sleeve (211), the inner diameter of the elastic hoop is smaller than the diameter of the inner conductor of the wire (3).

9. A residual current device according to claim 8, characterized in that, The left side wall of the lower end of the limiting pin (23) is a slope.

10. A residual current device according to claim 9, characterized in that, The air-blowing elongated holes are evenly distributed around the axis of the inner cylinder (24).

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