Circuit emergency protection device and method thereof

Abstract

The invention belongs to the technical field of emergency protection devices, and particularly relates to a circuit emergency protection device and a method thereof.The device comprises a wiring base, a normally-closed single-pole double-throw relay detachably arranged on the front end face of the wiring base, and a surge protection module arranged on the lower portion of the front end face of the wiring base; a mounting groove is formed in the front end surface of the wiring base, and the surge protection module is detachably arranged in the mounting groove; the device further comprises a separation module arranged in the installation groove and used for being triggered when the surge protection module breaks down and is short-circuited, and separation operation of the surge protection module and the installation groove is achieved. In the actual working process, overload or surge voltage can be released through the surge protection module so as to protect the load, and if continuous fault overload voltage occurs, the surge protection module breaks down and is short-circuited, and then the temperature continuously rises to cause a fire disaster. Therefore, the surge protection module can be separated from the mounting groove through the separation operation executed by the separation module so as to realize forced disconnection.

Description

Technical Field

[0001] The present invention relates to the technical field of emergency protection devices, and in particular to a circuit emergency protection device and a method thereof. Background Art

[0002] With the rapid development of national economy and modern science and technology, various electronic devices and large-scale integrated circuits are widely used in modern buildings. Due to their low working voltage and limited overvoltage tolerance, the probability of damage and interference once they are attacked by surge overvoltage is greatly increased. Therefore, in these circuits, circuit emergency protection devices need to be installed at the front end of the load. For this requirement, surge protectors (Surge Protective Device, SPD) used to limit transient overvoltage and discharge surge current devices are widely used in various occasions such as power supply systems, antenna feed systems, and communication systems to reduce the adverse effects of fault overvoltage and achieve the purpose of emergency protection.

[0003] However, in actual use, the metal oxide varistor (MOV), the core component of the surge protector, will generate continuous high temperature when encountering a high continuous fault overvoltage. If the circuit cannot be cut off in time at this time, the MOV will melt and break down, or even arc, causing the MOV or SPD packaging materials to burn and catch fire, which often causes certain economic losses and adverse effects.

[0004] Therefore, in response to the above technical problems, this solution specifically proposes a new circuit emergency protection device and method. Summary of the invention

[0005] The object of the present invention is to provide a circuit emergency protection device to solve the problems raised in the background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: a circuit emergency protection device and method thereof, the device comprising a wiring base and a normally closed single-pole double-throw relay detachably arranged on the front end surface of the wiring base; It also includes a surge protection module disposed at the lower part of the front end surface of the wiring base, the front end surface of the wiring base is provided with a mounting groove, and the surge protection module is detachably disposed in the mounting groove; It also includes a separation module arranged in the installation slot, which is used to be triggered when the surge protection module breaks down and short-circuits, and realizes the separation operation of the surge protection module and the installation slot.

[0007] The circuit emergency protection device described in the present invention, wherein the normally closed single-pole double-throw relay includes a shell and a relay body arranged in the shell; a normally closed contact terminal and a normally open contact terminal are pierced through the side wall of the shell corresponding to the armature moving head of the relay body, and the outer end pins of the normally closed contact terminal and the normally open contact terminal are respectively inserted into the two first wiring ports on the wiring base.

[0008] The circuit emergency protection device of the present invention is characterized in that the housing is provided with insulating oil for immersing the contact points of the armature movable head.

[0009] The circuit emergency protection device described in the present invention, wherein the surge protection module includes a high-voltage conduction element, and a plug connector adapted to the input pin and output pin of the high-voltage conduction element is provided on the bottom surface of the installation groove; the output pin includes a grounding branch pin and a trigger branch pin; the grounding end of the grounding branch pin is connected in series with a potential raising resistor, and the trigger branch pin is connected in series with a voltage-limiting resistor and is connected to the coil access head of the normally closed single-pole double-throw relay.

[0010] The circuit emergency protection device described in the present invention, wherein the high-voltage conduction element and the voltage-limiting resistor are both varistors, the potential raising resistor is a gas discharge tube, the conduction resistance of the potential raising resistor is greater than the resistance of the voltage-limiting resistor, and the voltage-limiting resistor has two-stage conduction states in which the conduction voltage increases successively.

[0011] The circuit emergency protection device described in the present invention, wherein the separation module includes a piston body that seals the installation groove and can slide back and forth, the interior of the piston body is provided with a receiving groove for accommodating the protective outer cover, and the output pin and the input pin both pass through the piston body; a quick connector facing the wiring base is connected on the lower end side wall of the shell, and a docking port for plugging in the quick connector is provided on the front side wall of the wiring base corresponding to the quick connector, the docking port is connected with the installation groove through a connecting channel, and the outlet of the connecting channel is located on the rear side of the piston body.

[0012] The circuit emergency protection device described in the present invention, wherein the separation module also includes discharge pins of the plug connector connected to the ground branch pin that are opposite to each other up and down, and an insulating stopper located between the normally open contact terminal and the normally closed contact terminal; when the voltage limiting resistor is in the first-level conduction state, the armature movable head leaves the normally closed contact terminal and abuts against the insulating stopper; when the voltage limiting resistor is in the second-level conduction state, the armature movable head detaches from the insulating stopper and conducts with the normally open contact terminal.

[0013] The circuit emergency protection device described in the present invention, wherein the first-level conduction state is triggered by a surge voltage on the high-voltage conduction element, and the second-level conduction state is triggered by a continuous surge voltage or a fault overload voltage on the high-voltage conduction element.

[0014] In the circuit emergency protection device of the present invention, when the piston body slides forward to its proper position, the liquid level of the insulating oil at the rear side of the piston body is located below the discharge point of the discharge needle and the corresponding plug connector.

[0015] In the circuit emergency protection device described in the present invention, the insulating stopper is a cylindrical structure and is laterally embedded in the side wall of the shell facing the wiring base, and an adjusting bolt for adjusting the insulating stopper to move forward or backward is provided on the side wall of the shell facing the wiring base.

[0016] In addition, the present invention also provides a method for implementing a circuit emergency protection device. According to the above circuit emergency protection device, the method for implementing the circuit emergency protection device includes the following steps: If a surge voltage or overload voltage occurs on the phase line, the surge voltage is released through the surge protection module; If a continuous fault overload voltage occurs in the phase line, causing the temperature of the surge protection module to continue to rise and then to melt and short-circuit, the separation module performs a separation operation to separate the surge protection module from the installation slot to forcibly disconnect the surge protection module from the circuit.

[0017] Compared with the prior art, the present invention has the following beneficial effects: in actual operation, if a surge voltage or overload voltage appears on the phase line, the surge voltage will be released through the surge protection module to protect the load; if a continuous fault overload voltage appears on the phase line, causing the temperature of the surge protection module to continue to rise and then to cause a short circuit due to thermal melt breakdown, in order to avoid the continuous increase in temperature causing the packaging material and the base to burn and cause a fire, at this time, the separation operation can be performed by the separation module to separate the surge protection module from the installation slot, so as to achieve forced disconnection of the surge protection module from the circuit, thereby removing the fire risk point. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is the overall structure diagram of the present invention.

[0020] Figure 2 It is a side view of the present invention.

[0021] Figure 3 for Figure 2 AA section view.

[0022] Figure 4 for Figure 3 A magnified view of the local structure.

[0023] Figure 5 for Figure 3 A magnified view of the local structure.

[0024] Figure 6 It is a diagram showing the internal structure of the high voltage conduction element of the present invention.

[0025] Figure 7 It is a circuit schematic diagram of the present invention. DETAILED DESCRIPTION

[0026] The terms "first", "second", "third" and "fourth" etc. in the specification and claims of the present invention and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0027] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] "Multiple" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0029] Moreover, the terms "up, down, left, right, upper end, lower end, longitudinal" and the like indicating directions are all based on the posture and position of the device or equipment described in this solution during normal use.

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be described clearly and completely in combination with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are partial embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0031] This embodiment discloses Figures 1 to 7 The circuit emergency protection device shown in the figure comprises a wiring base 10 and a normally closed single-pole double-throw relay 20 detachably arranged on the front end surface of the wiring base 10, wherein the wiring base 10 is in the shape of a rectangular parallelepiped and its material is flame-retardant ABS that meets the regulations. Further, a pair of wiring terminals 300 are arranged on the upper part, the top end surface and the lower end surface of the front side wall of the wiring base 10, which are used to realize the connection of the external power grid phase line of each pin. Further, in order to facilitate the setting of the internal connection line connecting the pins of the normally closed single-pole double-throw relay 20 and the corresponding wiring terminals. A boss portion 101 is integrally provided on the front side wall of the wiring base 10, and a pair of wiring terminals on the front side wall of the wiring base 10 are located at the upper part of the front side wall of the boss portion 101, and the normally closed single-pole double-throw relay 20 is installed in the middle part of the front side wall of the boss portion 101. The normally closed single-pole double-throw relay 20 is plugged into the first wiring port 102 on the boss portion 101 through its pins, thereby realizing the purpose of quick disassembly and quick replacement. In order to further ensure stability, a U-shaped wire rack 200 is provided on the boss portion 101 to tighten the relay against the boss portion 101 .

[0032] Further, the device also includes a surge protection module 30 disposed at the lower part of the front end surface of the wiring base 10. Specifically, the surge protection module 30 is located at the lower part of the front side wall of the boss portion 101 and below the normally closed single-pole double-throw relay 20. Further, a mounting groove 1011 is provided on the front end surface of the wiring base 10, specifically on the front side wall of the boss portion 101. The surge protection module 30 is disposed in the mounting groove 1011 in a detachable mounting manner, so that it can be separated from the wiring base 10 in the event of replacement and spontaneous combustion, wherein the surge protection module 30 and the mounting groove 1011 are both rectangular parallelepiped structures.

[0033] The device further includes a separation module 40 disposed in the mounting slot 1011, which is used to be triggered when the surge protection module 30 is short-circuited due to a continuous fault overload voltage, and realizes the separation operation of the surge protection module 30 and the mounting slot 1011; when a continuous overload high voltage appears in the circuit phase line (live line), the temperature of the surge protection module 30 will continue to rise. If effective measures are not taken in time, subsequent fire risks will be caused, and the separation module of the device can just move the surge protection module out of the mounting slot 1011 according to its working temperature, thereby avoiding fire risks.

[0034] In actual operation, if a surge voltage or overload voltage appears on the phase line, the surge voltage is released through the surge protection module 30 to protect the load. If a continuous fault overload voltage appears on the phase line, causing the temperature of the surge protection module 30 to continue to rise and then to melt and short-circuit, in order to avoid the continuous temperature rise causing the packaging material and the base to burn and cause a fire, the separation module 40 can be used to perform a separation operation to separate the surge protection module 30 from the installation slot 1011, so as to forcibly disconnect the surge protection module 30 from the circuit, thereby removing the heat source, thereby avoiding the temperature of the wiring base 10 from continuing to rise and eventually causing an open flame to cause a fire.

[0035] In this embodiment, the normally closed single-pole double-throw relay 20 includes a square housing 21 and a relay body 22 disposed in the housing 21. The housing 21 includes a bottom plate 211 for fixing the relay body 22, and a sealing cover 212 for sealing the relay body 22 on the bottom plate 211. A normally closed contact terminal 222 and a normally open contact terminal 223 are provided on the side wall of the housing 21, specifically on the bottom plate 211, and the armature movable head 221 corresponding to the relay body 22 is provided. The outer end pins of the normally closed contact terminal 222 and the normally open contact terminal 223 are respectively plugged into two first wiring ports 102 on the wiring base 10, specifically on the front side wall of the boss portion 101; and the two wiring pins 2241 of the coil 224 of the relay body 22 are respectively plugged into the other two first wiring ports 102; and the pin 2210 of the access line of the armature movable head 221 of the relay body 22 is plugged into another first wiring port 102.

[0036] In addition, in order to ensure that the wiring inside the wiring base 10 is more reasonable, the two pins of the coil 224 of the relay body 22 are arranged side by side on the left and right, the normally open contact terminal 223 and the normally closed contact terminal 222 are arranged side by side up and down and are both located below the two pins of the coil 224, and the pin 2210 of the access line of the armature movable head 221 is located above the pin of the coil 224.

[0037] In this embodiment, insulating oil is provided in the housing 21 to immerse the contact points of the armature movable head 221, specifically immersing the contact points on the upper side of the armature movable head 221, so as to avoid arcing during the switching of contacts; wherein the insulating oil is preferably mineral insulating oil, and of course it can also be other commonly used synthetic insulating oils.

[0038] In this embodiment, the surge protection module 30 includes a high-voltage conductive element 31, and a protective cover 32 which is encapsulated outside the high-voltage conductive element 31 and is a rectangular parallelepiped structure, and the protective cover 32 is adapted to the inner circumferential contour of the mounting groove 1011. Specifically, a plug connector 50 adapted to the input pin 311 and the output pin 312 of the high-voltage conductive element 31 is provided on the bottom surface of the mounting groove 1011, and the plug connector 50 is composed of two relatively fitted metal sheets, and an expansion port is generally provided at the insertion end of the plug connector 50. Similarly, the first wiring port 102 adopts the same structure, which is a common component in the industry and will not be described in detail here.

[0039] Furthermore, the output pin 312 of the high-voltage conduction element 31 includes a ground branch pin 3121 and a trigger branch pin 3122; the ground end of the ground branch pin 3121 is connected in series with a potential raising resistor 60, and the trigger branch pin 3122 is connected in series with a voltage limiting resistor 70 and connected to the coil 224 access head of the normally closed single-pole double-throw relay 20, specifically through the first wiring port 102 that is plugged in and matched with the pin 2210 of the access line of the armature moving head 221. When the relay is plugged in, its coil is connected to the high-voltage conduction element 31 through the trigger branch pin. Among them, the voltage limiting resistor 70 and the potential raising resistor 60 are both encapsulated inside the protective cover 32. The ends of the ground branch pin 3121 and the trigger branch pin 3122 extend out of the protective cover 32 and can be connected to the plug connector. During operation, if a surge voltage appears on the phase line, the high-voltage conduction element 31 is triggered to conduct by the surge voltage. At this time, the cooperation of the voltage-limiting resistor 70 and the potential-raising resistor 60 can ensure that the coil 224 is energized and triggered normally without being burned, thereby magnetizing the iron core and attracting the armature moving head 221 to move away from the normally closed contact terminal 222, thereby cutting off the input of the load and ensuring that the load is not burned by the surge voltage.

[0040] In this embodiment, the high voltage conduction element 31 and the voltage limiting resistor 70 are both varistors, the potential raising resistor 60 is a gas discharge tube, and the conduction resistance of the potential raising resistor 60 is greater than the resistance of the voltage limiting resistor 70, so that the voltage limiting resistor 70 can normally divide the voltage to trigger the coil 224.

[0041] The potential raising resistor 60 is a discharge tube, and the characteristics of the discharge tube connected in series with the high voltage conduction element 31 can be utilized to make the circuit have the following advantages: 1. The two are used in series with complementary overvoltage protection characteristics: Varistors and gas discharge tubes have different overvoltage protection characteristics and response times. Varistors can respond quickly when the voltage is too large, providing a larger resistance to absorb the overvoltage current; while gas discharge tubes can provide a higher discharge capacity when overvoltage occurs, diverting the overvoltage current to the ground. The overvoltage protection characteristics of the two are complementary, and can provide more comprehensive protection in different situations.

[0042] 2. Using the two in series can also reduce the output residual voltage: When the varistor and the gas discharge tube are used in series, the output residual voltage can be greatly reduced due to the synergistic effect of the two. This is especially important for protecting sensitive devices in the circuit and can effectively prevent device damage caused by overvoltage.

[0043] 3. The two can be used in series to improve the current carrying capacity: the gas discharge tube has a high current carrying capacity. When a large current appears in the circuit, the gas discharge tube can be turned on in time and drain the current to the ground. After being connected in series with the varistor, the current carrying capacity of the circuit can be further improved to ensure the stable operation of the circuit under extreme conditions.

[0044] 4. Extend service life: Since the varistor absorbs large current in the circuit for a long time, it is easy to cause performance degradation and aging. When used in series with a gas discharge tube, the gas discharge tube can isolate the varistor from the system under normal working conditions, reduce the voltage and leakage current flowing through the varistor, thereby effectively slowing down the performance degradation of the varistor and extending its service life.

[0045] In addition, in the present embodiment, the voltage-limiting resistor 70 has two-stage conduction states in which the conduction voltage increases successively, that is, a surge appears at the front end of the high-voltage conduction element 31 to excite it to conduct, and the circuit state in this state makes the voltage-limiting resistor 70 voltage division in the first-stage conduction state, in which the voltage-limiting resistor 70 obtains a relatively low voltage and current, and the coil 224 can be magnetized to a limited extent for the core in this state, so that the armature moving head 221 can be normally adsorbed away from the normally closed contact terminal 222; and when a continuous fault high voltage appears in the phase line, the high-voltage conduction element 31 will be in the conduction state for a long time during the fault voltage time, and since the varistor generates severe heat during this period (at this time, the cooling effect of the insulating oil and the self-heating rate of the chip MOV can no longer balance the heat generated), the chip will burn through and short-circuit after a certain period of time, and at this time, the isolation resistance of the circuit drops suddenly, causing the front-end voltage of the voltage-limiting resistor 70 to increase suddenly, thereby causing it to be in the second-stage conduction state.

[0046] If the overvoltage of the high-voltage conduction element 31 lasts for a long time, the internal chip MOV is continuously turned on, resulting in heat accumulation. At this time, the heat generation rate P=I 2 R and heat dissipation rate P cool=k(T-T0) competition (k is the heat dissipation coefficient, T0 is the ambient temperature). It can be seen that if the heat generation rate exceeds the heat dissipation, the temperature will rise exponentially. When the temperature exceeds the material limit (usually 150-200°C), the zinc oxide grain boundary structure will be irreversibly damaged, resulting in increased leakage current or short circuit, which may cause the MOV to crack, burn or explode. If the short circuit temperature continues to rise, generally exceeding 750° (under the dual effects of the heating temperature of the MOV and the overload high voltage), the wiring base 10 will be burned. As for this situation, the present embodiment can solve the problem in the following manner, that is, by setting a separation module 40 including a sealed mounting groove 1011 and a piston body 41 that can slide back and forth, the interior of the piston body 41 is provided with a receiving groove 410 for accommodating the protective outer cover 32, and the output pin 312 and the input pin 311 both pass through the piston body 41; a quick connector 80 facing the wiring base 10 is connected on the lower end side wall of the shell 21, and a docking port 90 for plugging in is provided on the front side wall of the wiring base 10 corresponding to the quick connector 80, and the docking port 90 is connected to the mounting groove 1011 through a connecting channel 100, and the outlet of the connecting channel 100 is located on the rear side of the piston body 41.

[0047] The quick connector 80 is specifically composed of a hollow tube 81, a movable seal 82 and a reset spring 83 located inside the hollow tube 81. Specifically, the movable seal 82 is a T-shaped piece, and its transverse end is a disc plug 821 that seals the hollow tube 81. One end of the hollow tube 81 is plugged into the bottom plate 211 of the housing 21 and communicates with the sealing cover 212 through the flow channel 110 and can export the insulating oil inside the hollow tube. Under the action of the reset spring 83, the end of the movable seal 82 with a larger diameter keeps sealing the hollow tube 81 in the initial state. When the end of the movable seal 82 is inserted into the docking port 90, an abutment 120 is provided in the docking port 90 for the longitudinal end of the movable seal 82 to abut against, so that the movable seal 82 can be connected to the bottom plate 211 of the housing 21. After the connection is in place, the disc plug 821 of the movable head 82 is opened, so that the inside of the relay is connected to the chamber on the rear side of the piston body 41, so that before use, the piston body 41 can be faced forward to suck the insulating oil inside the relay into the installation groove 1011; of course, the quick connector 80 can also be designed as a simpler soft rubber sealing film structure, and a needle is provided in the docking port 90 to pierce the soft rubber sealing film. This method can also achieve the purpose of introducing the insulating oil inside the power saver into the installation groove 1011 when the power saver is installed in place. Furthermore, a certain amount of insulating oil can also be pre-injected into the bottom of the installation groove 1011 to meet the cooling of the chip MOV and prevent arcing caused by poor pin contact.

[0048] Furthermore, the separation module 40 also includes a discharge needle 42 of a plug connector connected to the ground branch pin 3121, which is opposite to the upper and lower ones of the plug connector, and an insulating stopper 130 located between the normally open contact terminal 223 and the normally closed contact terminal 222; when the voltage limiting resistor 70 is in the first-stage conduction state, the armature movable head 221 leaves the normally closed contact terminal 222 and abuts against the insulating stopper 130, and when the voltage limiting resistor 70 is in the second-stage conduction state, in this state, the coil 224 is further energized so that the iron core is further magnetized to increase its magnetic attraction. At this time, the attraction force on the armature movable head 221 is greater than before, thereby causing the armature movable head 221 to break away from the insulating stopper 130 and contact and conduct with the normally open contact terminal 223; further, when the piston body 41 slides forward into place, the liquid level of the insulating oil located on the rear side of the piston body 41 is located below the discharge needle 42 and the discharge point of the plug connector corresponding thereto. At this time, due to the insulating oil on the rear side of the piston body 41 Decomposition occurs under the action of high temperature for a long time, so that the combustible gas produced during the whole process accumulates in the chamber on the rear side of the piston body 41 (mineral insulating oil mainly produces hydrogen and methane under low temperature (<300℃) thermal fault, and mainly produces methane and ethylene under medium and high temperature (≥300℃) thermal fault. In addition, a small amount of carbon dioxide (CO2) and carbon monoxide (CO) and other gases are also generated). When the discharge needle 42 is instantly connected to discharge, the combustible gas will be ignited, so that the pressure on the rear side of the piston body 41 suddenly increases and pushes it out of the installation groove 1011. At this time, the short-circuited and burned high-voltage conductive element 31 can be forcibly separated from the circuit system, thereby avoiding the continuous development of the fire source; further, it is also possible to pre-install gas, liquid or solid that can be ignited by the discharge arc of the discharge needle in the chamber on the rear side of the piston body, but compared with the method of using insulating oil to precipitate combustible gas when heated, it cannot take into account the heat absorption effect of the high-voltage conductive element.

[0049] In addition, in order to ensure that the protective cover 32 can still be smoothly pushed out of the installation groove 1011 when the MOV chip inside it is burned, a barrel structure 140 made of a heat-conductive metal material can be added in the installation groove 1011 to cooperate with the normal front and rear movement of the piston body 41, wherein it is necessary to take into account the insulation of the discharge needle 42, the plug connector and the barrel structure 140. Moreover, a cover 150 covering the front end of the barrel structure 140 can also be provided on the front side wall of the boss portion 101 to achieve the purpose of protection, but this arrangement method needs to take into account the ejection of the piston body 41, and ensure that it does not affect the smooth ejection of the piston body 41.

[0050] In this embodiment, the insulating stopper 130 is a cylindrical structure and is transversely embedded in the side wall of the housing 21 facing the wiring base 10. An adjusting bolt 160 for adjusting the insulating stopper 130 to move forward or backward is provided on the side wall of the housing 21 facing the wiring base 10. The overlapping degree between the insulating stopper 130 and the armature movable head 221 can be shortened backward by adjusting the bolt 160. When the insulating stopper 130 is shortened backward to a certain extent, the armature movable head 221 will be reset and re-contact the normally closed contact terminal 222. After it is in place, the insulating stopper 130 can be reset here to prepare for the next operation of the relay.

[0051] Furthermore, the implementation method of the circuit emergency protection device of the present invention comprises the following steps: If a surge voltage or overload voltage occurs on the phase line, the surge voltage is released through the surge protection module; If a continuous fault overload voltage occurs on the phase line, causing the temperature of the surge protection module to continue to rise and then to melt and short-circuit, the separation operation is performed by the separation module to separate the surge protection module from the installation slot, so as to forcibly disconnect the surge protection module from the circuit and forcibly remove the fire risk point.

[0052] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A circuit emergency protection device, characterized in that: It includes a wiring base and a normally closed single-pole double-throw relay detachably arranged on the front end surface of the wiring base; It also includes a surge protection module disposed at the lower part of the front end surface of the wiring base, the front end surface of the wiring base is provided with a mounting groove, and the surge protection module is detachably disposed in the mounting groove; It also includes a separation module arranged in the installation slot, which is used to be triggered when the surge protection module breaks down and short-circuits, and realizes the separation operation of the surge protection module and the installation slot.

2. The circuit emergency protection device according to claim 1, characterized in that: The normally closed single-pole double-throw relay includes a shell and a relay body arranged in the shell; a normally closed contact terminal and a normally open contact terminal are pierced through the side wall of the shell corresponding to the armature movable head of the relay body, and the outer end pins of the normally closed contact terminal and the normally open contact terminal are respectively inserted into two first wiring ports on the wiring base, and insulating oil is provided in the shell to immerse the contact points of the armature movable head.

3. The circuit emergency protection device according to claim 2, characterized in that: The surge protection module includes a high-voltage conduction element, and a plug connector adapted to the input pin and output pin of the high-voltage conduction element is provided on the bottom surface of the installation groove; the output pin includes a ground branch pin and a trigger branch pin; the ground end of the ground branch pin is connected in series with a potential raising resistor, and the trigger branch pin is connected in series with a voltage-limiting resistor and connected to the coil access head of the normally closed single-pole double-throw relay.

4. The circuit emergency protection device according to claim 3, characterized in that: The high-voltage conduction element and the voltage-limiting resistor are both varistors, the potential raising resistor is a gas discharge tube, the conduction resistance of the potential raising resistor is greater than the resistance of the voltage-limiting resistor, and the voltage-limiting resistor has two-stage conduction states with successively increasing conduction voltages.

5. The circuit emergency protection device according to claim 4, characterized in that: The separation module includes a piston body that seals the mounting groove and can slide back and forth, the interior of the piston body is provided with a receiving groove for accommodating the protective outer cover of the high-voltage conductive element, and the output pin and the input pin both pass through the piston body; a quick connector facing the wiring base is connected on the lower end side wall of the shell, and a docking port for plugging in the quick connector is provided on the front side wall of the wiring base corresponding to the quick connector, and the docking port is connected with the mounting groove through a connecting channel, and the outlet of the connecting channel is located on the rear side of the piston body.

6. The circuit emergency protection device according to claim 5, characterized in that: The separation module also includes discharge pins that are opposite to each other up and down and connected to the ground branch pin, and an insulating stopper located between the normally open contact terminal and the normally closed contact terminal; when the voltage limiting resistor is in the first-level conduction state, the armature movable head leaves the normally closed contact terminal and abuts against the insulating stopper; when the voltage limiting resistor is in the second-level conduction state, the armature movable head is separated from the insulating stopper and is connected to the normally open contact terminal.

7. The circuit emergency protection device according to claim 6, characterized in that: The first-level conduction state is triggered by a surge voltage on the high-voltage conduction element, and the second-level conduction state is triggered by a continuous surge voltage or a fault overload voltage on the high-voltage conduction element.

8. The circuit emergency protection device according to claim 5, characterized in that: When the piston body slides forward to its proper position, the liquid level of the insulating oil at the rear side of the piston body is located below the discharge needle and the discharge point of the corresponding plug connector.

9. The circuit emergency protection device according to claim 6, characterized in that: The insulating stopper is a cylindrical structure and is transversely embedded on the side wall of the shell facing the wiring base. An adjusting bolt for adjusting the insulating stopper to move forward or backward is arranged on the side wall of the shell facing the wiring base.

10. A method for implementing a circuit emergency protection device, according to the circuit emergency protection device according to any one of claims 1 to 9, characterized in that: The implementation method of the circuit emergency protection device comprises the following steps: If a surge voltage or overload voltage occurs on the phase line, the surge voltage is released through the surge protection module; If a continuous fault overload voltage occurs in the phase line, causing the temperature of the surge protection module to continue to rise and then to melt and short-circuit, the separation module performs a separation operation to separate the surge protection module from the installation slot to forcibly disconnect the surge protection module from the circuit.

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