CN110444966A - A kind of automatic temperature-controlled socket and its working method based on marmem - Google Patents

Abstract

The invention discloses an intelligent temperature-controlled socket based on a shape memory alloy and a working method thereof. The reed, an independent switch and a power indicator light are sequentially connected through wires in the socket shell, and each temperature-controlled memory alloy device is connected in series with the reed respectively. , the independent switch and the power indicator light, the temperature-controlled memory alloy device includes a cylindrical shell, a cylinder, screw I and screw II, and the circumferential surface of the cylindrical shell and one of the end faces are all made of It is made of insulating material, and the other end surface of the cylindrical shell is made of conductive material. The cylinder is composed of a telescopic part made of shape memory alloy and a connecting part with a groove inside. The conductive end face of the housing is pressed into contact. When the temperature exceeds the set value, the circuit of the socket and the power supply can be automatically disconnected to make it stop working, so as to prevent it from burning due to excessive temperature; the circuit of the power supply and the socket can be automatically connected after the temperature of the socket is lowered during the stop working process to make it work.

Description

An automatic temperature control socket based on shape memory alloy and its working method

technical field

The invention relates to a socket, in particular to an automatic temperature control socket based on a shape memory alloy and a working method thereof.

Background technique

The power socket is an electrical accessory that has a socket for engaging with the pin of the plug and is equipped with a terminal for connecting a flexible cable. kinds of electronic products. At present, the power socket has been used as one of the essential electrical equipment in our work and life. However, during the use of the socket, due to the aging of electrical appliances or improper insertion of the plug and socket, a short circuit occurs and the current in the circuit increases. It will cause the socket to burn, and then cause the combustible materials around the socket to burn and finally cause a fire, which will cause huge danger and loss to people and property. Therefore, the most important thing about sockets as electrical equipment is safety.

In order to ensure the safety of the socket during use, flame-retardant materials are currently used for the shell material of the socket, and then the internal circuit is equipped with a leakage protection function; but the above-mentioned protection measures are all remedies after the internal circuit of the socket has failed. Due to the use of sockets (including mobile sockets and fixed sockets), the plug will perform plugging and unplugging actions with the socket many times. During the plugging process, the temperature of the socket will rise after the circuit is connected due to improper plugging. , it may also be due to the increase in the current of the circuit in the socket due to the continuous increase in the power of the aging indicator during the use of the electrical appliance, resulting in an increase in the temperature of the socket; in these cases, the temperature rise process is slow, not like When a short circuit occurs, the temperature will rise rapidly, so the temperature of the socket will gradually increase after these conditions first occur, and will not cause burning to the socket. As time goes by, the temperature of the socket will continue to increase until it reaches the inside of the socket. The ignition point of the device or the combustibles around the socket temperature are affected by the temperature of the socket and cause combustion. Although the socket shell has flame-retardant materials, the current flame-retardant materials mainly do not burn within a certain temperature range. Combustion may occur. Therefore, in order to be able to know the situation in time when the temperature of the socket gradually rises, the power supply can be cut off in time to effectively avoid the occurrence of this kind of burning; the current electronic temperature control method is to install a temperature sensor in the socket And the controller and the relay, the normally closed switch of the relay is connected in series in the circuit of the socket, by presetting a temperature threshold in the controller, then the temperature sensor collects the temperature value in the socket in real time, and feeds back the collected temperature value to the controller , the controller compares the detected temperature value with the preset temperature threshold. If the detected temperature value does not reach the temperature threshold, the controller does not send a control signal. At this time, the normally closed switch of the relay is still connected to the circuit of the socket normally. It is in normal working state; if the detected temperature value exceeds the temperature threshold, the controller sends a control signal to energize the relay, and then disconnects the normally closed switch, so that the socket is in a non-working state; the socket is cooled by disconnecting the circuit , so that the power supply can be cut off before the temperature of the socket rises to the ignition point, so as to ensure that the socket will not burn. But this method has the following disadvantages: 1. This method needs to add multiple electrical components in the socket, and circuit failure may occur in itself due to the electrical components, causing the temperature in the socket to rise; Ensuring that the various electrical components are safely arranged in the socket will result in a large increase in the volume of the socket, which is inconvenient to use.

Therefore, how to overcome the shortcoming of this electric control temperature detection socket, and simultaneously have the socket of its function again, is the problem to be solved urgently in this industry.

Contents of the invention

In view of the problems existing in the above-mentioned prior art, the present invention provides an automatic temperature control socket based on a shape memory alloy and its working method, which can automatically disconnect the circuit between the socket and the power supply to stop working when the temperature exceeds the set value, preventing It burns because the temperature is too high; when the temperature of the socket is lowered during the stop working process, the circuit of the power supply and the socket can be automatically connected to make it work normally; in addition, the present invention does not need to add additional electrical components, thereby not only ensuring the small size of the socket, And avoid the situation that the socket burns due to the increased failure of electrical components.

In order to achieve the above purpose, the technical solution adopted by the present invention is: an intelligent temperature-controlled socket based on shape memory alloy, including a top cover, a base, a plurality of reeds, an independent switch and a power indicator light, and the top cover and the base form the socket shell , multiple reeds, independent switches and power indicator lights are connected sequentially through wires in the socket housing, and multiple temperature-controlled memory alloy devices are also included, and each temperature-controlled memory alloy device is connected in series with the reeds, independent switches and power indicator lights. on the wire between,

The temperature-controlled memory alloy device includes a cylindrical shell, a cylinder, screw I and screw II, the two end faces of the cylindrical shell are respectively provided with screw ports, the circumferential surface of the cylindrical shell and one of the end faces They are all made of insulating materials, the other end of the cylindrical shell is made of conductive material, the cylinder is inside the cylindrical shell, and the cylinder is connected by a telescopic part made of shape memory alloy and a groove inside. The outer surface of the connecting part of the cylinder is provided with threads, and is threadedly connected with the threaded opening of the insulating end surface of the cylindrical shell, so as to make the telescopic part of the cylinder press and contact with the conductive end surface of the cylindrical shell; Internal threads are provided on the groove wall of the connection part, and the screw I is fixedly connected with the groove of the connection part through threads; the screw II is fixedly connected with the threaded opening of the conductive end surface of the cylindrical shell through threads.

Further, the screws I and II are both made of conductive materials.

Further, the processing process of the expansion and contraction part of the cylinder is as follows: using a shape memory alloy with a phase transition temperature of 80°C to make a shape memory alloy cylinder, and then using a known thermomechanical cycle training method to process the shape memory alloy cylinder, The axial length of the shape memory alloy cylinder in the low-temperature phase state with a temperature lower than 80°C is 7% to 8% longer than the axial length in the high-temperature phase state with a temperature exceeding 80°C, thereby making it with two-way memory stretching part of the effect.

A working method for an automatic temperature-controlled socket based on a shape memory alloy. The automatic temperature-controlled socket is assembled at normal temperature. The specific working process of the automatic temperature-controlled socket is as follows: When the temperature of the cylinder is lower than 80℃, the temperature of the telescopic part of the cylinder is also lower than 80℃. According to the two-way memory effect mechanism, the telescopic part of the cylinder is in a low-temperature phase state at this time, and its axial length does not change. The telescopic part and the conductive end surface of the cylindrical shell are still in contact with each other, so that the socket is in the normal working state of power; when the temperature inside the socket exceeds 80 °C, the temperature of the telescopic part of the cylinder exceeds 80 °C, according to the two-way memory effect Mechanism, the telescopic part of the cylinder changes from a low-temperature phase to a high-temperature phase, thereby shortening its axial length by 7% to 8%; the telescopic part of the cylinder is separated from the conductive end face of the cylindrical shell, just like a resistance wire is blown , so that the socket is disconnected from the power supply so that it is in a power-off and stop working state; after the socket stops working, as the temperature in the socket decreases, when the temperature of the telescopic part of the column is lower than 80 ° C, according to the two-way memory effect mechanism , the telescopic part of the cylinder changes from a high-temperature phase to a low-temperature phase, so that its axial length elongates and restores its length in the low-temperature phase. At this time, the telescopic part of the cylinder and the conductive end surface of the cylindrical shell reconnect Press the contact tightly; so that the socket is connected to the power supply, so that it is in the normal working state of power; in this way, as long as the temperature exceeds 80°C, the socket will automatically disconnect from the power supply and stop working, and when the temperature is lower than 80°C, the socket will automatically connect. Normal operation with power on.

Compared with prior art, the present invention has following advantage:

1. Safe and reliable: the intelligent temperature-controlled socket provided by the present invention retains all the functions of ordinary sockets, and its significant advantage is that the temperature-controlled memory alloy device can automatically control the temperature. If the temperature is too high, it will automatically disconnect the power supply and the socket. The connection stops working, which avoids the occurrence of fire and improves the safety of people and property. When the temperature drops, the connection of the internal circuit of the socket can be automatically restored, which is convenient for subsequent use, thereby reducing the use cost of the socket.

2. The process is simple and the operation is convenient: only by processing the shape memory alloy to obtain the expansion and contraction part of the two-way memory alloy with heat shrinkage and cold expansion, a temperature-controlled memory alloy device can be obtained. This device has high environmental temperature The feature of turning off the power from time to time and turning on the power when the temperature is low is to make up for the lack of other complex temperature control equipment. If the maximum temperature of the required socket is lower, the phase transition temperature of the designed memory alloy cylinder is also lower.

3. High durability and low cost: Because the temperature-controlled memory alloy device has the advantages of large recovery deformation, good electrical conductivity, long fatigue life and small environmental factors, at the same time, the temperature-controlled memory alloy device can work continuously for hundreds of millions of cycles times without failure, making the durability of the socket higher. Since the temperature-controlled memory alloy device replaces all the functions of the traditional resistance wire, and it also has an automatic recovery function, a temperature-controlled memory alloy device can at least act as the use effect of a lot of resistance wires, and also eliminates the cost of replacing the fuse. The economic cost of the socket is greatly reduced.

4. Wide application range: the temperature control equipment composed of electrical components is replaced by memory alloy devices, which significantly expands the application range of the present invention, making this type of temperature control socket not only suitable for high temperature equipment control, but also suitable for Environment control with lower temperature; not only can be used alone, but also can be used in series or parallel; not only can act as a resistance wire, but also can replace a special temperature control device.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present invention;

Figure 2 is a schematic diagram of the disassembly of Figure 1;

Fig. 3 is the circuit connection schematic diagram of reed, independent switch, power indicator light and temperature control memory alloy device in the present invention;

Fig. 4 is a schematic structural view of the temperature-controlled memory alloy device in the present invention when it is in a low-temperature phase state;

Fig. 5 is a schematic structural view of the temperature-controlled memory alloy device in the present invention when it is in a high-temperature phase state.

In the figure: 1. Cylinder, 2. Cylindrical shell, 3. Screw Ⅰ, 4. Screw Ⅱ, 5. Independent switch, 6. Power indicator light, 7. Reed, 8. Top cover, 9. Base , 10, temperature-controlled memory alloy device.

Detailed ways

The present invention will be further described below.

As shown in Figures 1 to 3, an intelligent temperature-controlled socket based on shape memory alloys includes a top cover 8, a base 9, a plurality of reeds 7, an independent switch 5 and a power indicator light 6, a top cover 8 and a base 9 The socket shell is formed, and a plurality of reeds 7, independent switches 5 and power indicator lights 6 are sequentially connected through wires in the socket shell, and a plurality of temperature-controlled memory alloy devices 10 are also included, and each temperature-controlled memory alloy device 10 is connected in series on the reed respectively. On the wire between sheet 7, independent switch 5 and power indicator light 6,

The temperature-controlled memory alloy device 10 includes a cylindrical shell 2, a cylinder 1, a screw I3 and a screw II4, the two end faces of the cylindrical shell 2 are respectively provided with threaded ports, and the circumference of the cylindrical shell 2 The surface and one of the end faces are made of insulating material, the other end face of the cylindrical shell 2 is made of conductive material, the cylinder 1 is in the cylindrical shell 2, and the cylinder 1 is made of shape memory alloy The telescopic part of the cylindrical body 1 and the connecting part with a groove inside, the outer surface of the connecting part of the cylinder 1 is provided with threads, and is threadedly connected with the threaded opening of the insulating end surface of the cylindrical shell 2, and is used to make the telescopic part of the cylinder 1 and the The conductive end surface of the cylindrical shell 2 is pressed and contacted; the groove wall of the connecting part is provided with internal threads, and the screw I3 is fixedly connected with the groove of the connecting part through threads; the screw II4 is connected with the conductive end surface of the cylindrical shell 2. The threaded port is fixedly connected by threads.

Further, the screw I3 and the screw II4 are both made of conductive material.

Further, the processing process of the expansion and contraction part of the cylinder 1 is as follows: using a shape memory alloy with a phase transition temperature of 80°C to make a shape memory alloy cylinder, and then using a known thermomechanical cycle training method to process the shape memory alloy cylinder The axial length of the shape memory alloy cylinder in the low-temperature phase state with a temperature lower than 80°C is 7% to 8% longer than the axial length in the high-temperature phase state with a temperature exceeding 80°C, thereby making a two-way Telescoping part of the memory effect.

A working method for an automatic temperature-controlled socket based on a shape memory alloy. The automatic temperature-controlled socket is assembled at normal temperature. The specific working process of the automatic temperature-controlled socket is as follows: When the temperature of the column 1 is lower than 80°C, the temperature of the telescopic part of the cylinder 1 is also lower than 80°C. According to the mechanism of the two-way memory effect, the telescopic part of the column 1 is in a low-temperature phase at this time, and its axial length does not change. As shown in Figure 4, the telescopic part of the cylinder 1 is still in contact with the conductive end surface of the cylindrical shell 2, so that the socket is in a normal working state when the power is on; when the temperature inside the socket exceeds 80°C, the expansion and contraction of the cylinder 1 When the internal temperature exceeds 80°C, according to the two-way memory effect mechanism, the expansion and contraction part of the column 1 changes from a low-temperature phase to a high-temperature phase, thereby shortening its axial length by 7% to 8%; as shown in Figure 5, the column The telescopic part of the body 1 is separated from the conductive end surface of the cylindrical shell 2, as if the resistance wire is fused, so that the socket is disconnected from the power supply to make it in a power-off and stop working state; after the socket stops working, as the temperature in the socket drops , when the temperature of the telescopic part of the cylinder 1 is lower than 80 ° C, according to the mechanism of the two-way memory effect, the telescopic part of the cylinder 1 changes from a high-temperature phase to a low-temperature phase, so that its axial length elongates back to its original state The length of the low-temperature phase state. At this time, the telescopic part of the cylinder 1 is in contact with the conductive end surface of the cylindrical shell 2 again; thus the socket is connected to the power supply, and it is in a normal working state when it is energized; When the temperature exceeds 80°C, the socket is automatically disconnected from the power supply and stops working, and when the temperature is lower than 80°C, the socket is automatically connected to the power supply and works normally.

Claims (4)

1. An intelligent temperature-controlled socket based on a shape memory alloy, including a top cover (8), a base (9), a plurality of reeds (7), an independent switch (5) and a power indicator light (6), the top cover ( 8) and the base (9) form a socket shell, and a plurality of reeds (7), independent switches (5) and power indicator lights (6) are sequentially connected through wires in the socket shell, and it is characterized in that it also includes multiple temperature control Memory alloy device (10), each temperature control memory alloy device (10) is respectively connected in series on the wire between the reed (7), independent switch (5) and power indicator light (6), The temperature-controlled memory alloy device (10) includes a cylindrical shell (2), a cylinder (1), a screw I (3) and a screw II (4), and the two end faces of the cylindrical shell (2) Thread ports are provided respectively, the circumferential surface of the cylindrical shell (2) and one of the end faces are made of insulating material, the other end face of the cylindrical shell (2) is made of conductive material, and the cylinder (1 ) is located in the cylindrical shell (2), the cylinder (1) is composed of a telescopic part made of shape memory alloy and a connecting part with a groove inside, and the outer surface of the connecting part of the cylinder (1) is threaded, And threadedly connected with the threaded opening of the insulating end face of the cylindrical shell (2), used to make the telescopic part of the cylinder (1) press and contact with the conductive end face of the cylindrical shell (2); An internal thread is provided on the groove wall, and the screw I (3) is fixedly connected with the groove of the connecting part through threads; the screw II (4) is fixedly connected with the threaded opening of the conductive end surface of the cylindrical shell (2) through threads. 2. The automatic temperature control socket based on shape memory alloy according to claim 1, characterized in that, both the screw I (3) and the screw II (4) are made of conductive materials. 3. The automatic temperature control socket based on shape memory alloy according to claim 1, characterized in that, the processing process of the expansion and contraction part of the column (1) is: using a shape memory alloy with a phase transition temperature of 80°C Make a shape memory alloy cylinder, and then use the known thermomechanical cycle training method to process the shape memory alloy cylinder, so that the axial length of the shape memory alloy cylinder in the low temperature phase state at a temperature lower than 80 ° C is greater than its temperature The axial length is elongated by 7% to 8% in the high-temperature phase state of 80°C, so as to make a stretchable part with a two-way memory effect. 4. The working method of the automatic temperature control socket based on shape memory alloy according to claim 3, characterized in that, the automatic temperature control socket is assembled under normal temperature state, and the specific working process of the automatic temperature control socket is as follows: After the socket is powered on and starts to work, if the temperature inside the socket is lower than 80°C, the temperature of the expansion and contraction part of the cylinder (1) is also lower than 80°C. According to the mechanism of the two-way memory effect, the expansion and contraction of the cylinder (1) will part is in the low-temperature phase state, and its axial length does not change, and the telescopic part of the cylinder (1) is still in contact with the conductive end surface of the cylindrical shell (2), so that the socket is in a normal working state when it is energized; when the inside of the socket When the temperature of the cylinder (1) exceeds 80°C, the temperature of the telescopic portion of the column (1) exceeds 80°C. According to the mechanism of the two-way memory effect, the telescopic portion of the column (1) changes from a low-temperature phase to a high-temperature phase, thereby making it The axial length is shortened by 7% to 8%; the telescopic part of the cylinder (1) is separated from the conductive end face of the cylindrical shell (2), so that the socket is disconnected from the power supply to make it in a power-off and stop working state; when the stop socket stops After working, as the temperature in the socket decreases, when the temperature of the telescopic part of the column (1) is lower than 80°C, according to the mechanism of the two-way memory effect, the telescopic part of the column (1) changes from a high-temperature phase to a low-temperature phase Phase state, so that its axial length is elongated and restored to its length in the low temperature phase state, at this time, the telescopic part of the cylinder (1) is in contact with the conductive end surface of the cylindrical shell (2) again; so that the socket and Turn on the power to make it in the normal working state of power on; in this way, as long as the temperature exceeds 80 ℃, the socket will automatically disconnect from the power supply and stop working, and when the temperature is lower than 80 ℃, the socket will automatically turn on the power and work normally.