Switch socket overload protection structure

Abstract

The invention discloses an overload protection structure of a switch socket. The overload protection structure comprises a bottom shell and a top shell which are detachably connected. In the application, the wire harness on the main line and the socket wire harness are kept communicated under the action of the spring, when the main line or the socket line generates overload heating, heat is transferred to the memory alloy push strip through the corresponding heat conduction pedestal and the corresponding heat conduction connecting strip, and the memory alloy push strip is heated to deform and reset; the insulating partition plate is upwards inserted between the two sets of conical contacts, so that the switch socket and a main circuit are disconnected, overload protection of the switch socket is achieved, the lifting frame is pushed subsequently, the lifting frame drives the insulating partition plate to separate the two sets of conical contacts, meanwhile, the memory alloy push strip is forcibly deformed, and follow-up conduction of the socket is achieved. And the two groups of conical contacts can be separated by manually and actively lifting the lifting frame, so that the socket can be actively disconnected, and fire can be prevented from spreading to a main circuit through the flame-retardant coating on the insulating partition plate after the socket is on fire.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of overload protection structure, and particularly relates to a switch socket overload protection structure. BACKGROUND

[0002] The switch socket overload protection structure is a safety protection component integrated in a switch or socket, which can detect the overload state of an electric circuit and automatically cut off the power supply.

[0003] A kind of anti-overheat socket of automatic power-off is disclosed in Chinese patent publication No.CN109524857A published on March 26, 2019, which includes a shell, two power connection cavities are arranged in the shell, two U-shaped tubes are arranged side by side in the power connection cavities, the U-shaped tube includes an arc-shaped tube, the two ends of the arc-shaped tube are fixedly connected with a first straight tube and a second straight tube respectively, a temperature control box is fixedly connected to the inner bottom surface of the power connection cavity, mercury is filled in the temperature control box, the lower ends of the two first straight tubes are fixedly connected with the temperature control box and are in communication, the first straight tube is made of insulating material, a first conductive ring is embedded in the middle of the first straight tube, a second conductive ring is embedded in the lower end of the first straight tube, a conductive tube and a conductive rod are fixedly connected to the outer side walls of the first conductive rings of the two first straight tubes respectively, and a jack hole corresponding to the conductive tube is arranged on the side wall of the shell.

[0004] The existing switch socket overload protection structure sets a conductive column and an insulating layer, when the socket is seriously overheated, the mercury will expand, thereby disconnecting the circuit and playing a role in over-temperature protection. However, the structure of the invention is complex, and mercury, which is harmful to the human body, is used, which is not conducive to popularization and use, so there is an urgent need to propose a corresponding switch socket overload protection structure to solve the above problems. SUMMARY

[0005] The purpose of the present application is to solve the above problems by providing a switch socket overload protection structure.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0007] The switch socket overload protection structure includes a bottom shell and a top shell which are detachably connected, perforations are formed on the horizontal two sides of the bottom shell and the top shell, two groups of heat-conducting pad seats are fixedly connected to the top of the bottom shell, two groups of interface seats and elastic components for maintaining the position of the interface seats are integrated on the inner side of the bottom shell, and a fixing component for fixing the wire harness is arranged inside the interface seat, conical contacts are fixedly connected to the opposite surfaces of the two groups of interface seats, a memory alloy push bar for heat conduction with the heat-conducting pad seat is integrated at the bottom of the bottom shell, an insulating partition plate is fixedly connected to the top of the memory alloy push bar, and a reset component for resetting the insulating partition plate is arranged on the top of the top shell.

[0008] Preferably, the top shell is provided with a pressing strip and a push-pull part for vertically pushing and pulling the pressing strip on the inner and outer sides respectively, and the outer wall of the pressing strip is connected with the inner wall of the top shell through a clamping groove.

[0009] Preferably, the push-pull part comprises a push rod which is screw-connected with the inner wall of the top of the top shell, and the bottom of the push rod is rotationally connected with the top of the pressing strip.

[0010] Preferably, the elastic assembly comprises a spring which is fixedly connected between the interface seat and the inner wall of the bottom shell.

[0011] Preferably, the fixing assembly comprises a fixing rod which is screw-connected with the top of the interface seat, and the open end of the fixing rod abuts against the outer wall of the wire harness.

[0012] Preferably, the bottom of the inner wall of the bottom shell is fixedly connected with a heat-conducting bottom strip which is fixedly matched with the bottom of the memory alloy push strip, and the outer wall of the heat-conducting bottom strip is fixedly connected with the outer wall of the heat-conducting pad seat through a heat-conducting connecting strip.

[0013] Preferably, the outer wall of the insulating partition is coated with a flame-retardant coating.

[0014] Preferably, the reset assembly comprises a bracket which is fixedly connected with the top of the insulating partition, and the top of the top shell is provided with a through slot which is matched with the bracket, and the top of the bracket protrudes out of the top shell.

[0015] Preferably, the processing of the memory alloy push strip comprises the following steps:

[0016] S1, raw material selection and pretreatment: selecting copper-zinc-aluminum alloy, cleaning the surface oil stain with anhydrous ethanol, removing the oxide layer through pickling, washing with clean water and drying;

[0017] S2, wave-shaped preforming: making a wave-shaped groove mold according to the designed wavelength and wave height, embedding the alloy wire into the mold groove, locking the two ends with high-temperature resistant clamps to ensure that the wire and the mold are completely matched without gaps, and using an upper and lower wave-shaped stamping die;

[0018] S3, shaping heat treatment: placing the fixed preformed part into a vacuum heat treatment furnace, heating to 380-430℃, the holding time is calculated according to the thickness, 1mm corresponds to 10 minutes, the maximum holding time is not more than 90 minutes, and the part is taken out after cooling to below 100℃ and the clamps are loosened.

[0019] The use method of the switch socket overload protection structure comprises the following steps:

[0020] S1, the fire line, zero line and ground wire on the main line are respectively threaded through three groups of perforations formed on one side of the bottom shell and the top shell, and are connected with the corresponding interface seat, and the fixing of the fire line, zero line and ground wire on the main line is completed through the corresponding fixing rod, and the fire line, zero line and ground wire drawn from the socket are also threaded through three groups of perforations formed on the other side of the bottom shell and the top shell, and are fixed through the corresponding fixing rod;

[0021] S2, the wire harness on the main line and the socket wire harness are kept in communication under the action of the spring;

[0022] S3, when the main line or the socket line appears overloading and heating, the heat is transferred to the memory alloy push bar through the corresponding heat-conducting pad seat and heat-conducting connecting strip, the memory alloy push bar is deformed and reset by heat, and the insulating partition plate is inserted between the two groups of conical contacts upwardly, so as to realize the disconnection of the switch socket and the main line.

[0023] In summary, due to the adoption of the above technical scheme, the application has the following beneficial effects:

[0024] 1, in the application, the fire line, zero line and ground wire on the main line are respectively threaded through three groups of perforations formed on one side of the bottom shell and the top shell, and are connected with the corresponding interface seat, and the fixing of the fire line, zero line and ground wire on the main line is completed through the corresponding fixing rod, and the fire line, zero line and ground wire drawn from the socket are also threaded through three groups of perforations formed on the other side of the bottom shell and the top shell, and are fixed through the corresponding fixing rod, under normal conditions, the wire harness on the main line and the socket wire harness are kept in communication under the action of the spring, and when the main line or the socket line appears overloading and heating, the heat is transferred to the memory alloy push bar through the corresponding heat-conducting pad seat and heat-conducting connecting strip, the memory alloy push bar is deformed and reset by heat, and the insulating partition plate is inserted between the two groups of conical contacts upwardly, so as to realize the disconnection of the switch socket and the main line, thereby realizing the overload protection of the switch socket, and the subsequent pushing of the bracket, the bracket drives the insulating partition plate to separate the two groups of conical contacts, at the same time, the memory alloy push bar is forced to deform, so as to realize the subsequent conduction of the socket, and the two groups of conical contacts can also be separated by manually lifting the bracket, so as to realize the active disconnection of the socket, and the flame spreading to the main line can be prevented through the flame-retardant coating on the insulating partition plate after the socket catches fire.

[0025] After the installation of the fire line, zero line and ground wire on the main line and the socket is completed, the two groups of push rods are rotated respectively to be screwed with the top shell, and the two groups of push rods synchronously drive the two groups of pressing strips to move downwardly, so as to realize the local positioning of the two groups of fire line, zero line and ground wire, avoid the adjustment of the subsequent main line or socket to affect the stability of the connection of the two groups of conical contacts, and further improve the stability of the use of the switch socket overload protection structure. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1The overall structure schematic diagram provided by the embodiment of the present application is shown.

[0027] Figure 2 The pressing strip structure schematic diagram provided by the embodiment of the present application is shown.

[0028] Figure 3 The bottom shell structure schematic diagram provided by the embodiment of the present application is shown.

[0029] Figure 4 The heat-conducting pad seat structure schematic diagram provided by the embodiment of the present application is shown.

[0030] Figure 5 The interface seat structure schematic diagram provided by the embodiment of the present application is shown.

[0031] Legend:

[0032] 1, bottom shell; 2, top shell; 3, through slot; 4, pushing rod; 5, heat-conducting pad seat; 6, pressing strip; 7, spring; 8, bracket; 9, interface seat; 10, insulating partition plate; 11, memory alloy pushing strip; 12, heat-conducting bottom strip; 13, heat-conducting connecting strip; 14, fixed rod; 15, conical contact; 16, clamping groove. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0034] Please refer to Figures 1-5 The present application provides a technical solution:

[0035] The switch socket overload protection structure comprises a detachably connected bottom shell 1 and top shell 2, the bottom shell 1 and the top shell 2 are both formed with through holes on the horizontal two sides, the bottom shell 1 is fixedly connected with two groups of heat-conducting pad seats 5 on the top, the inner side of the bottom shell 1 is integrated with two groups of interface seats 9 and elastic components for maintaining the positions of the interface seats 9, and the interface seats 9 are provided with fixed components for fixing wire harnesses inside, the opposite faces of the two groups of interface seats 9 are fixedly connected with conical contacts 15, the bottom shell 1 is integrated with memory alloy pushing strips 11 on the bottom for heat conduction with the heat-conducting pad seats 5, the memory alloy pushing strips 11 are fixedly connected with insulating partition plates 10 on the top, and the top of the top shell 2 is provided with reset components for resetting the insulating partition plates 10.

[0036] The processing of the memory alloy pushing strip 11 comprises the following steps:

[0037] S1, raw material selection and pretreatment: select copper zinc aluminum alloy, clean the surface oil stain with anhydrous ethanol, then remove the oxide layer by pickling, rinse with water and dry;

[0038] S2, wave preforming: make a wave-shaped groove mold according to the designed wavelength and wave height, embed the alloy wire into the mold groove, lock the two ends with high-temperature resistant clamps to ensure that the wire and the mold are completely matched without gaps, and use an upper and lower wave-shaped stamping mold;

[0039] S3, shaping heat treatment: place the fixed preformed part into a vacuum heat treatment furnace, heat to 380-430℃, the holding time is calculated according to the thickness, 1mm corresponds to 10 minutes, the maximum holding time is not more than 90 minutes, and the furnace is cooled to below 100℃ before taking out and loosening the clamp.

[0040] The live wire, zero wire and ground wire on the main line are respectively threaded through the three groups of perforations formed on one side of the bottom shell 1 and the top shell 2, and connected with the corresponding interface seat 9, and the fixing of the live wire, zero wire and ground wire on the main line is completed through the corresponding fixing rod 14. Similarly, the live wire, zero wire and ground wire led out from the socket are respectively threaded through the three groups of perforations formed on the other side of the bottom shell 1 and the top shell 2, and are also fixed by the corresponding fixing rod 4. Under normal conditions, the wire harness on the main line and the socket wire harness are kept in communication under the action of the spring 7, while in the case of overload heating of the main line or the socket line, the heat is transferred to the memory alloy push bar 11 through the corresponding heat-conducting pad seat 5 and heat-conducting connecting strip 13, and the memory alloy push bar 11 is deformed and reset by heat, and the insulating partition plate 10 is inserted upward between the two groups of conical contacts 15, so as to realize the disconnection of the socket and the main line, thereby realizing the overload protection of the socket. Subsequently, the bracket 8 is pushed, the bracket 8 drives the insulating partition plate 10 to separate the two groups of conical contacts 15, and the memory alloy push bar 11 is forced to deform, so as to realize the subsequent conduction of the socket. In addition, the two groups of conical contacts 15 can be separated by manually lifting the bracket 8, which can realize the active disconnection of the socket, and after the socket catches fire, the fire can be prevented from spreading to the main line through the flame-retardant coating on the insulating partition plate 10.

[0041] It should be noted that the memory shape and the subsequent forced deformation shape of the memory alloy push bar 11 are both wave-shaped structures, only the wave distance is different, which can ensure that the memory alloy push bar 11 can maintain a unified path for stretching and contracting.

[0042] Specifically, as Figure 2 and Figure 4As shown, pressure strips 6 and push-pull parts for vertically pushing and pulling the pressure strips 6 are respectively provided on the inner and outer sides of the top shell 2. The outer wall of the pressure strip 6 is slidably connected to the inner wall of the top shell 2 through the slot 16. The push-pull part includes a push rod 4 that is screwed into the inner wall of the top of the top shell 2, and the bottom of the push rod 4 is rotatably connected to the top of the pressure strip 6. After the installation of the live wire, neutral wire and ground wire on the main line and the socket is completed, the two sets of push rods 4 are rotated to screw into the top shell 2. The two sets of push rods 4 synchronously drive the two sets of pressure strips 6 to move downward, thereby realizing the local positioning of the two sets of live wire, neutral wire and ground wire, avoiding the subsequent adjustment of the main line or socket from affecting the stability of the connection of the two sets of conical contacts 15, thereby further improving the stability of the switch socket overload protection structure.

[0043] Specifically, such as Figure 2 and Figure 3 As shown, the elastic component includes a spring 7 fixedly connected between the interface seat 9 and the inner wall of the bottom shell 1. The wire harness on the main line and the socket wire harness are kept connected under the action of the spring 7. The fixing component includes a fixing rod 14 screwed to the top of the interface seat 9, and the open end of the fixing rod 14 abuts against the outer wall of the wire harness. The live wire, neutral wire and ground wire on the main line are fixed by the corresponding fixing rod 14. A heat-conducting bottom strip 12 is fixedly connected to the inner wall of the bottom of the bottom shell 1 and is fixedly matched with the bottom of the shape memory alloy push strip 11. The outer wall of the heat-conducting bottom strip 12 is fixedly connected to the outer wall of the heat-conducting pad 5 through the heat-conducting connecting strip 13. When the main line or the socket line is overloaded and heats up, the heat is transferred to the shape memory alloy push strip 11 through the corresponding heat-conducting pad 5 and the heat-conducting connecting strip 13. The shape memory alloy push strip 11 is deformed and reset by heat.

[0044] Specifically, such as Figure 1 and Figure 2 As shown, the outer wall of the insulating partition 10 is coated with a flame-retardant coating. The reset assembly includes a lifting frame 8 fixedly connected to the top of the insulating partition 10, and the top of the top shell 2 has a through groove 3 that fits the lifting frame 8. The top of the lifting frame 8 protrudes from the top shell 2. By manually lifting the lifting frame 8, the two sets of conical contacts 15 have been separated. This can achieve active disconnection of the socket and, after the socket catches fire, prevent the fire from spreading to the main line through the flame-retardant coating on the insulating partition 10.

[0045] Working principle: the live wire, the zero line and the ground wire on the main line are respectively threaded through the three groups of perforations formed on one side of the bottom shell 1 and the top shell 2 and connected with the corresponding interface seat 9, and the fixing of the live wire, the zero line and the ground wire on the main line is completed through the corresponding fixed rod 14, and similarly, the live wire, the zero line and the ground wire led out from the socket are respectively threaded through the three groups of perforations formed on the other side of the bottom shell 1 and the top shell 2 and fixed through the corresponding fixed rod 4, under normal conditions, the wire harness on the main line and the socket wire harness are kept in communication under the action of the spring 7, and when the main line or the socket line is overloaded and heated, the heat is transferred to the memory alloy push strip 11 through the corresponding heat-conducting pad seat 5 and the heat-conducting connecting strip 13, the memory alloy push strip 11 is deformed and reset by heat, and the insulating partition plate 10 is inserted between the two groups of conical contacts 15 upwardly, so as to realize the disconnection of the switch socket and the main line, thereby realizing the overload protection of the switch socket, the subsequent push-up of the bracket 8, the bracket 8 drives the insulating partition plate 10 to separate the two groups of conical contacts 15, at the same time, the memory alloy push strip 11 is forced to deform, so as to realize the subsequent conduction of the socket, and the separation of the two groups of conical contacts 15 can also be realized by manually actively lifting the bracket 8, which can realize the active disconnection of the socket, and after the socket catches fire, the fire spreading to the main line can be prevented through the fire-retardant coating on the insulating partition plate 10, after the installation of the live wire, the zero line and the ground wire on the main line and the socket, the two groups of push rods 4 are rotated respectively to make them screw with the top shell 2, and the two groups of push rods 4 synchronously drive the two groups of pressing strips 6 to move downwardly, so as to realize the local positioning of the two groups of live wire, zero line and ground wire, avoiding the influence of the subsequent adjustment of the main line or the socket on the stability of the connection of the two groups of conical contacts 15, thereby further improving the stability of the use of the switch socket overload protection structure.

[0046] The above description of the embodiments enables one skilled in the art to make or use the application. Numerous modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not to be limited to the implementations illustrated herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An overload protection structure for a switch and socket, comprising a detachably connected bottom shell (1) and a top shell (2), characterized in that, Both the bottom shell (1) and the top shell (2) have perforations on their horizontal sides. The bottom shell (1) has two sets of heat-conducting pads (5) fixedly connected to its top. The bottom shell (1) has two sets of interface seats (9) integrated inside, as well as an elastic component for maintaining the position of the interface seats (9). The interface seats (9) are provided with a fixing component for fixing the wire harness inside. The two sets of interface seats (9) are fixedly connected with tapered contacts (15) on their opposite sides. The bottom of the bottom shell (1) has a shape memory alloy pusher (11) that conducts heat with the heat-conducting pads (5). The shape memory alloy pusher (11) is fixedly connected to an insulating partition (10) on its top. The top of the top shell (2) is provided with a reset component for resetting the insulating partition (10).

2. The overload protection structure for a switch and socket according to claim 1, characterized in that, The top shell (2) is provided with pressure strips (6) on its inner and outer sides and a push-pull part for vertically pushing and pulling the pressure strips (6). The outer wall of the pressure strips (6) is slidably connected to the inner wall of the top shell (2) through a slot (16).

3. The overload protection structure for a switch and socket according to claim 2, characterized in that, The push-pull part includes a push rod (4) that is screwed into the inner surface of the top of the top shell (2), and the bottom of the push rod (4) is rotatably connected to the top of the pressure strip (6).

4. The overload protection structure for a switch and socket according to claim 3, characterized in that, The elastic component includes a spring (7) fixedly connected between the interface seat (9) and the inner wall of the bottom shell (1).

5. The overload protection structure for a switch and socket according to claim 4, characterized in that, The fixing component includes a fixing rod (14) that is screwed into the top of the interface seat (9), and the open end of the fixing rod (14) abuts against the outer wall of the wire harness.

6. The overload protection structure for a switch and socket according to claim 5, characterized in that, The bottom inner wall of the bottom shell (1) is fixedly connected to a heat-conducting bottom strip (12) that is fixedly matched with the bottom of the shape memory alloy pusher (11), and the outer wall of the heat-conducting bottom strip (12) is fixedly connected to the outer wall of the heat-conducting pad (5) through a heat-conducting connecting strip (13).

7. The overload protection structure for a switch and socket according to claim 6, characterized in that, The outer wall of the insulating partition (10) is coated with a flame-retardant coating.

8. The overload protection structure for a switch and socket according to claim 7, characterized in that, The reset assembly includes a lifting frame (8) fixedly connected to the top of the insulating partition (10), and the top of the top shell (2) is provided with a through groove (3) that fits the lifting frame (8), and the top of the lifting frame (8) protrudes from the top shell (2).

9. The overload protection structure for a switch and socket according to claim 8, characterized in that, The processing of the shape memory alloy pusher (11) includes the following steps: S1. Raw material selection and pretreatment: Copper-zinc-aluminum alloy is selected. The surface oil is cleaned with anhydrous ethanol, the oxide layer is removed by pickling, and then the material is rinsed with water and dried. S2. Wave-shaped preforming: Make a wave-shaped groove mold according to the designed wavelength and wave height, embed the alloy wire into the mold groove, and lock both ends with high-temperature resistant clamps to ensure that the wire and the mold are completely in contact without gaps. Use a wave-shaped stamping mold with upper and lower fitting. S3. Shaping heat treatment: Place the fixed preform into a vacuum heat treatment furnace, heat it to 380-430℃, and hold it for 10 minutes for 1mm thickness. The maximum holding time shall not exceed 90 minutes. After cooling to below 100℃ in the furnace, take it out and loosen the clamps.

10. The method of using an overload protection structure for switches and sockets, characterized in that, Includes the following steps: S1. Pass the live wire, neutral wire and ground wire on the main line through the three sets of holes formed on one side of the bottom shell (1) and top shell (2) respectively, and connect them to the corresponding interface socket (9). Then fix the live wire, neutral wire and ground wire on the main line through the corresponding fixing rod (14). Similarly, the live wire, neutral wire and ground wire led out from the socket pass through the three sets of holes formed on the other side of the bottom shell (1) and top shell (2) respectively, and fix them through the corresponding fixing rod (14). S2. The main line harness and the socket harness remain connected under the action of spring (7); S3. When the main line or socket line is overloaded and heats up, the heat is transferred to the shape memory alloy pusher (11) through the corresponding heat-conducting pad (5) and heat-conducting connecting strip (13). The shape memory alloy pusher (11) is heated and deformed and reset. The insulating partition (10) is inserted upward between the two sets of conical contacts (15) to realize the disconnection of the switch socket from the main line.

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