Combined surge protector

Abstract

The utility model relates to the technical field of overvoltage protection, and provides a combined surge protector, which comprises a switch type protection module, a voltage limiting type protection module and a switching conductive piece, and is characterized in that the switch type protection module comprises a first mounting cover and a graphite gap protection unit, and the graphite gap protection unit is mounted on the first mounting cover; the voltage limiting type protection module comprises a second mounting cover and a piezoresistor, and the piezoresistor is mounted on the second mounting cover; one end of the switching conductive piece is electrically connected with the tail end of the graphite gap protection unit, and the other end of the switching conductive piece is electrically connected with the head end of the piezoresistor. In the series combined branch, due to the fact that the parasitic capacitance of the discharge gap is very small, the function of isolating the piezoresistor from a system is achieved, the threshold voltage of the piezoresistor is reduced, unnecessary leakage current is reduced, performance degradation of the piezoresistor is effectively slowed down, the piezoresistor continues to provide protection under the condition that the voltage is low but still destructive, and the service life of the piezoresistor is prolonged. And the service life of the combined surge protector is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of overvoltage protection, and particularly relates to a combined surge protector. Background Art

[0002] A surge protection device (SPD) is an electronic device that provides safety protection for various electronic devices, instruments, and communication lines. When a spike current or voltage suddenly occurs in an electrical circuit or communication line due to external interference, the surge protector can conduct and shunt in an extremely short time, thereby avoiding damage to other devices in the circuit caused by the surge.

[0003] The existing voltage-limiting surge protectors can only limit lightning currents and voltages smaller than themselves. If there are parameters higher than or equal to the limits, the voltage-limiting surge protectors will have a risk of failure, resulting in damage to the rear equipment and losses. Therefore, the service life of the existing surge protectors needs to be improved. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a combined surge protector, aiming to solve the technical problem that the service life of the existing surge protectors needs to be improved.

[0005] The present application provides a combined surge protector, which includes:

[0006] A switching-type protection module, including a first mounting cover and a graphite gap protection unit. The graphite gap protection unit is installed in the first mounting cover, and a first pin electrode is electrically connected to the head end of the graphite gap protection unit.

[0007] A voltage-limiting protection module, including a second mounting cover and a varistor. The varistor is installed in the second mounting cover, and a second pin electrode is electrically connected to the tail end of the varistor.

[0008] A transfer conductive member, one end of which is electrically connected to the tail end of the graphite gap protection unit, and one end of which is electrically connected to the head end of the varistor, so that the switching-type protection module is connected in series with the voltage-limiting protection module.

[0009] In one embodiment, the transfer conductive member is electrically connected to the tail end of the graphite gap protection unit through a first tripping structure, and the first tripping structure is used to separate from the tail end of the graphite gap protection unit at a first preset temperature.

[0010] In one of the embodiments, the first tripping structure includes a first reset member, a slide plate and a tripping spring piece, the slide plate is slidably mounted on the first mounting cover, the tripping spring piece is arranged on the slide plate, the tripping spring piece is fixedly conductively connected to the transition conductive member, the tripping spring piece is connected to the end of the graphite gap protection unit through a first solder, the melting point of the first solder is the first preset temperature, the first reset member is mounted on the first mounting cover, and the first reset member is used to apply a reset force to the slide plate so that the slide plate drives the tripping spring piece to separate from the end of the graphite gap protection unit.

[0011] In one of the embodiments, the combined surge protector further includes a first connector, which is fixedly and conductively connected to the end of the graphite gap protection unit; and the trip spring is connected to the first connector via the first solder.

[0012] In one of the embodiments, at least one of the first connecting member and the tripping spring is disposed on a protrusion, and the protrusion is connected to the first solder.

[0013] In one embodiment, the combined surge protector also includes a first alarm device, which is in a first state when the first tripping structure is connected to the end of the graphite gap protection unit, and the first alarm device is in a second state when the first tripping structure is separated from the end of the graphite gap protection unit, and the first state and the second state are opposite.

[0014] In one of the embodiments, the first alarm device includes two first alarm electrodes, the two first alarm electrodes are in contact and connected when pressed by the slide, and the first restoring member applies a restoring force to the slide away from the first alarm electrodes.

[0015] In one of the embodiments, one end of the first warning electrode is installed at a distance from the first installation cover; the installation end of the first warning electrode is close to the head end of the graphite gap protection unit.

[0016] In one of the embodiments, the slide plate is provided with a warning label.

[0017] In one of the embodiments, the transition conductive member is electrically connected to the first end of the varistor via a second tripping structure, and the second tripping structure is used to be separated from the first end of the varistor at a second preset temperature.

[0018] In one embodiment, the second tripping structure includes a tripping electrode, a rotating member, and a second reset member. The rotating member is rotatably mounted on the second mounting cover. The tripping electrode is fixedly and electrically connected to the adapter conductive member. The tripping electrode is connected to the first end of the varistor through a second solder, and the melting point of the second solder is the second preset temperature. The second reset member is mounted on the second mounting cover, and the second reset member is configured to apply a reset force to the rotating member so that the rotating member drives the tripping electrode to separate from the first end of the varistor.

[0019] In one embodiment, the combined surge protector further includes a second warning device. The second warning device is in a third state when the second tripping structure is connected to the first end of the varistor, and the second warning device is in a fourth state when the second tripping structure is separated from the first end of the varistor. The third state and the fourth state are opposite.

[0020] In one embodiment, the combined surge protector further includes a housing, and the switch-type protection module and the voltage-limiting type protection module are arranged side by side in the housing.

[0021] In one embodiment, the housing has a first side and a second side arranged opposite to each other. The end of the graphite gap protection unit and the first end of the varistor are arranged close to the first side, and the first end of the graphite gap protection unit and the end of the varistor are close to the second side.

[0022] In one embodiment, the first side has a first window, and the projection of the first window along its normal direction is located at the end of the graphite gap protection unit.

[0023] In one embodiment, the first side has a second window, and the projection of the second window along its normal direction is located at the first end of the varistor;

[0024] In one embodiment, the adapter conductive member is located between the switch-type protection module and the voltage-limiting type protection module.

[0025] The beneficial effects of the combined surge protector provided by the present utility model are as follows: The current sequentially passes through the first pin electrode, the switch-type protection module, the transfer conductive part, the voltage-limiting protection module, and the second pin electrode, forming a series circuit combination branch; when there is no transient overvoltage, the graphite gap protection unit is disconnected, and the varistor has almost no leakage current, which is beneficial to reducing the threshold voltage of the varistor without having to worry about the increase in leakage current caused thereby, and can more effectively slow down the performance degradation of the varistor; when a transient overvoltage acts, the graphite gap protection unit can quickly discharge and conduct electricity and divide the voltage, release the overcurrent into the ground without worrying about the problem of power frequency follow current, making the voltage acting on the voltage-limiting protection module, especially the varistor, lower, further protecting the varistor and extending its service life. Since the threshold voltage of the varistor can be selected to be lower, the series branch can give a lower clamping voltage than a single voltage-limiting protection module, and the voltage-limiting protection module can provide stable voltage limitation under lower but continuous impacts, which can significantly reduce the risk of damage to the rear equipment due to lightning strikes and ensure the stable operation of the system; in the series combination branch, due to the very small parasitic capacitance of the discharge gap, it plays a role in isolating the varistor from the system, reducing the threshold voltage of the varistor, reducing unnecessary leakage current, effectively slowing down the performance degradation of the varistor, and solving the technical problem that the service life of the existing surge protector needs to be improved. The graphite gap protection unit has a higher operating threshold and can respond first under extreme conditions, and then the varistor continues to provide protection under lower but still destructive conditions, forming a hierarchical protection mechanism to ensure more comprehensive protection and improve the service life of the combined surge protector. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present utility model, and those of ordinary skill in the art can obtain other drawings without creative efforts based on these drawings.

[0027] Figure 1 It is the circuit schematic diagram of the combined surge protector provided by the embodiment of the present utility model;

[0028] Figure 2 It is the structural schematic diagram of the combined surge protector provided by the embodiment of the present utility model;

[0029] Figure 3 It is the structural schematic diagram of the combined surge protector provided by the embodiment of the present utility model after removing the housing;

[0030] Figure 4 For Figure 3 Another perspective view of

[0031] Figure 5 It is an assembly schematic diagram of the switching type protection module of the combined surge protector provided by the embodiment of the present utility model;

[0032] Figure 6 It is Figure 5 another perspective view of;

[0033] Figure 7 It is an assembly schematic diagram of the voltage limiting type protection module of the combined surge protector provided by the embodiment of the present utility model;

[0034] Figure 8 It is Figure 7 another perspective view of.

[0035] Among them, the reference numerals in the figure are as follows:

[0036] 100, switching type protection module; 110, first mounting cover; 120, graphite gap unit; 121, graphite sheet; 122, mounting post; 123, spacer; 124, circuit board; 125, capacitor;

[0037] 200, voltage limiting type protection module; 210, second mounting cover; 220, varistor;

[0038] 310, first pin electrode; 320, second pin electrode; 330, transfer conductive member; 340, first connecting member; 350, second connecting member; 360, first warning device; 361, first warning electrode; 370, warning label; 380, second warning device; 381, second warning electrode; 390, third connecting member;

[0039] 400, first tripping structure; 410, first reset member; 420, slide plate; 430, tripping spring piece; 431, convex block;

[0040] 500, second tripping structure; 510, tripping electrode; 520, rotating member; 530, second reset member;

[0041] 600, housing; 601, first side; 602, second side; 603, first window; 604, second window. Detailed implementation manners

[0042] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as limiting the present utility model.

[0043] Reference to "one embodiment" or "an embodiment" throughout this specification means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the phrases "in one embodiment" or "in some embodiments" appearing throughout the specification do not necessarily all refer to the same embodiment. Additionally, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0044] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0045] Furthermore, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0046] In the present utility model, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected to", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0047] Combined Figure 1 、 Figure 2 and Figure 3 , this embodiment provides a combined surge protector. The combined surge protector includes a switching type protection module 100, a voltage limiting type protection module 200, and a transfer conductive member 330. The switching type protection module 100 includes a first mounting cover 110 and a graphite gap protection unit. The graphite gap protection unit is mounted on the first mounting cover 110, and the first end of the graphite gap protection unit is electrically connected to a first pin electrode 310.

[0048] The voltage-limiting protection module 200 includes a second mounting cover 210 and a varistor 220. The varistor 220 is installed in the second mounting cover 210, and a second pin electrode 320 is electrically connected to the end of the varistor 220. One end of the transfer conductive member 330 is electrically connected to the end of the graphite gap protection unit, and one end of the transfer conductive member 330 is electrically connected to the first end of the varistor 220, so that the switching protection module 100 and the voltage-limiting protection module 200 are connected in series.

[0049] Among them, the current sequentially passes through the first pin electrode 310, the switching protection module 100, the transfer conductive member 330, the voltage-limiting protection module 200, and the second pin electrode 320 to form a series circuit combination branch. When there is no transient overvoltage, the graphite gap protection unit is disconnected, and the varistor 220 has almost no leakage current, which is beneficial to reducing the threshold voltage of the varistor 220 without having to worry about the increase in leakage current caused thereby, and can more effectively slow down the degradation of the performance of the varistor 220. When a transient overvoltage acts, the graphite gap protection unit can quickly discharge and conduct and divide the voltage, release the overcurrent into the ground without worrying about the problem of power frequency follow current, so that the voltage acting on the voltage-limiting protection module 200, especially the varistor 220, is lower, further protecting the varistor 220 and extending its service life. Since the threshold voltage of the varistor 220 can be selected to be lower, the series branch can give a lower clamping voltage than a single voltage-limiting protection module 200. The voltage-limiting protection module 200 can provide stable voltage limitation under lower but continuous impacts, and can significantly reduce the risk of damage to the rear equipment due to lightning strikes, ensuring the stable operation of the system.

[0050] In the series combination branch, due to the very small parasitic capacitance 125 of the discharge gap, it acts to isolate the varistor 220 from the system, reduces the threshold voltage of the varistor 220, reduces unnecessary leakage current, effectively slows down the degradation of the performance of the varistor 220, and solves the technical problem that the service life of the existing surge protector needs to be improved. The graphite gap protection unit has a higher operating threshold and can respond first under extreme conditions. Subsequently, the varistor 220 continues to provide protection under lower but still destructive conditions, forming a hierarchical protection mechanism to ensure more comprehensive protection and improve the service life of the combined surge protector.

[0051] In some embodiments, in combination with Figure 2, The combined surge protector further includes a housing 600. The switching protection module 100 and the voltage-limiting protection module 200 are installed side by side in the housing 600 to prevent the switching protection module 100 and the voltage-limiting protection module 200 from being exposed, thereby protecting the safe use of the switching protection module 100 and the voltage-limiting protection module 200 and increasing the service life of the switching protection module 100 and the voltage-limiting protection module 200. Moreover, the switching protection module 100 and the voltage-limiting protection module 200 are arranged side by side with a compact layout. This not only facilitates the miniaturized design of the combined surge protector, makes installation convenient, and reduces the occupied space, but also reduces the distance between the end of the graphite gap protection unit and the beginning of the varistor 220. As a result, it is conducive to shortening the size of the transfer conductive part 330, simplifying the connection operation, and reducing adverse factors such as the parasitic inductance and parasitic capacitance 125 generated by the transfer conductive part 330.

[0052] In one embodiment, combined with Figure 2 and Figure 3 , the housing 600 has a first side 601 and a second side 602 which are oppositely arranged. The end of the graphite gap protection unit and the beginning of the varistor 220 are arranged close to the first side 601, and the beginning of the graphite gap protection unit and the end of the varistor 220 are arranged close to the second side 602. Based on this, the first pin electrode 310 and the second pin electrode 320 can both be arranged on the second side 602 and are electrically connected to the beginning of the graphite gap protection unit and the end of the varistor 220 respectively, facilitating the electrical connection operation; the end of the graphite gap protection unit and the beginning of the varistor 220 are on the same side, shortening the distance between them. As a result, it is conducive to shortening the size of the transfer conductive part 330, simplifying the connection operation, and reducing adverse factors such as the parasitic inductance and parasitic capacitance 125 generated by the transfer conductive part 330.

[0053] In this way, the current path from the first pin electrode 310 (located at the beginning of the graphite gap protection unit) to the second pin electrode 320 (located at the end of the varistor 220) is directly and efficiently planned, reducing unnecessary detours and improving the overall protection efficiency and response speed.

[0054] In one embodiment, combined with Figure 4 , the transfer conductive part 330 is located between the switching protection module 100 and the voltage-limiting protection module 200, which is conducive to shortening the size of the transfer conductive part 330, with a compact layout, and at the same time reducing adverse factors such as the parasitic inductance and parasitic capacitance 125 generated by the transfer conductive part 330.

[0055] In one embodiment, combined with Figure 2 and Figure 3The first side 601 has a first window 603, and the projection of the first window 603 along its normal direction is located at the end of the graphite gap protection unit, which is convenient for checking the working status of the graphite gap protection unit through the first window 603 so as to perform maintenance in time.

[0056] In one embodiment, in combination Figure 2 and Figure 3 The first side 601 has a second window 604, and the projection of the second window 604 along its normal direction is located at the head end of the varistor 220, which is convenient for checking the working status of the varistor 220 through the second window 604 so as to perform maintenance in time.

[0057] In some embodiments, in combination Figure 3 The graphite gap unit 120 includes a mounting post 122 and a plurality of graphite sheets 121. The plurality of graphite sheets 121 are installed on the mounting post 122 at intervals, and the gaps between the graphite sheets 121 form a graphite gap. The first graphite sheet 121 is electrically connected to the first pin electrode 310, and the last graphite sheet 121 is electrically connected to the transition conductive member 330.

[0058] Specifically, there are two mounting posts 122, and the graphite sheet 121 is mounted between the two mounting posts 122. Optionally, the graphite sheet 121 is inserted into the mounting posts 122.

[0059] Specifically, the graphite gap unit 120 includes a spacer 123, and the spacer 123 is arranged between two adjacent graphite sheets 121. The graphite sheets 121 and the spacers 123 are alternately distributed, and the spacers 123 are made of insulating material. Optionally, the spacer 123 is installed in the installation column 122. Optionally, there is a gap between the spacer 123 and the graphite sheet 121.

[0060] Specifically, the graphite gap unit 120 includes a circuit board 124 and a plurality of capacitors 125, which are welded and fixed on the circuit board 124 to form a whole. A plurality of ejector pins are provided on the circuit board 124, and the ejector pins are connected to the capacitors 125 through the circuits on the circuit board 124, and the ejector pins are in contact and electrically connected with the graphite sheet 121. Optionally, the circuit board 124 is installed on a side of the mounting column 122 away from the graphite sheet 121.

[0061] In some embodiments, in combination Figure 5 and Figure 6, the transfer conductive member 330 is electrically connected to the end of the graphite gap protection unit through the first tripping structure 400. The first tripping structure 400 is used to separate from the end of the graphite gap protection unit at the first preset temperature, so as to disconnect the transfer conductive member 330 from the end of the graphite gap protection unit. By designing a tripping failure mechanism, when the surge current is too large, the graphite gap protection unit or the first tripping structure 400 generates heat through the current thermal effect. When the temperature reaches the operating temperature of the first tripping structure 400, the circuit can be automatically cut off, the arc can be quickly cut off, further damage to the equipment caused by the continuous burning of the arc can be prevented, and component damage and safety accidents such as fires can be prevented. The first tripping structure 400 is arranged between the tripping spring piece 430 and the graphite gap protection unit, so that the tripping action of the first tripping structure 400 is faster and more reliable, and the reliability of the surge protector is increased.

[0062] In one embodiment, in combination with Figure 5 and Figure 6 , the first tripping structure 400 includes a first reset member 410, a sliding plate 420 and a tripping spring piece 430. The sliding plate 420 is slidably installed in the first mounting cover 110. The tripping spring piece 430 is arranged on the sliding plate 420. The tripping spring piece 430 is fixedly conductively connected to the transfer conductive member 330. The tripping spring piece 430 is connected to the end of the graphite gap protection unit through a first solder. The melting point of the first solder is the first preset temperature. The first reset member 410 is installed in the first mounting cover 110. The first reset member 410 is used to apply a reset force to the sliding plate 420, so that the sliding plate 420 drives the tripping spring piece 430 to separate from the end of the graphite gap protection unit.

[0063] When there is no overvoltage in the circuit, the graphite gap unit 120, the tripping spring piece 430 and the transfer conductive member 330 are conductively connected in sequence. When the surge current is too large, the temperature of the end of the graphite gap protection unit and / or the tripping spring piece 430 reaches the first preset temperature, the first solder melts, the end of the graphite gap protection unit and the tripping spring piece 430 are separated, and the sliding plate 420 is under the action of the reset force applied by the first reset member 410, accelerating and enhancing the separation of the tripping spring piece 430 from the end of the graphite gap protection unit, thereby disconnecting the entire circuit, and finally effectively protecting the electrical equipment from overvoltage damage with high reliability.

[0064] Optionally, the first preset temperature is 100°C to 300°C.

[0065] Optionally, the first solder can be an environmentally friendly brazing solder.

[0066] Optionally, the tripping spring piece 430 is arranged on the sliding plate 420. It can be that the tripping spring piece 430 is fixedly installed on the sliding plate 420, or the tripping spring piece 430 is pressed against the sliding plate 420, and no specific limitation is made here.

[0067] Specifically, in combination with Figure 5 and Figure 6 , the combined surge protector further includes a first connecting member 340, and the first connecting member 340 is fixedly and conductively connected to the end of the graphite gap protection unit. The tripping spring piece 430 is connected to the first connecting member 340 through a first solder. The setting of the first connecting member 340 facilitates the electrical connection operations of the end of the graphite gap protection unit and the tripping spring piece 430 respectively.

[0068] Optionally, at least one of the first connecting member 340 and the tripping spring piece 430 is disposed on the bump 431, and the bump 431 is connected to the first solder. The area of the bump 431 is small and the temperature is likely to be high, which is conducive to quickly melting the first solder, that is, separating the first connecting member 340 and the tripping spring piece 430. The fast response mechanism helps to cut off the circuit in time and prevent the surge current from damaging the subsequent equipment. Since the design of the bump 431 makes the heat more likely to concentrate, the temperatures of other parts (such as the first connecting member 340, the tripping spring piece 430, etc.) are relatively low before reaching the melting temperature, reducing the thermal stress impact on the entire combined surge protector and helping to extend its service life.

[0069] Optionally, the first connecting member 340 is provided with the bump 431, or the tripping spring piece 430 is provided with the bump 431, or both the first connecting member 340 and the tripping spring piece 430 are provided with the bump 431.

[0070] Specifically, in combination with Figure 5 and Figure 6 , the combined surge protector further includes a second connecting member 350, the second connecting member 350 is connected to a first pin electrode 310, and the second connecting member 350 is fixedly and conductively connected to the head end of the graphite gap protection unit. The setting of the second connecting member 350 facilitates the electrical connection operations of the head end of the graphite gap protection unit and the first pin electrode 310 respectively.

[0071] In some embodiments, in combination with Figure 5 and Figure 6The combined surge protector also includes a first alarm device 360. The first alarm device 360 is in a first state when the first tripping structure 400 is connected to the end of the graphite gap protection unit. The first alarm device 360 is in a second state when the first tripping structure 400 is separated from the end of the graphite gap protection unit. The first state and the second state are opposite. Based on this, when the switch-type protection module 100 is subjected to a lightning strike or overload current exceeding its tolerance, the graphite gap protection unit will respond quickly and trigger a tripping action. The first alarm device 360 is in the second state, alerting the outside world. The first alarm device 360 changes from the first state to the second state, and immediately sends an alarm signal to the user or the monitoring system to remind timely inspection and processing, so as to avoid subsequent equipment damage or safety accidents caused by failure to find the fault in time.

[0072] Optionally, the first alarm device 360 can be connected to the central control room via a remote monitoring system. In this way, even when the user is far away from the site, the user can also know the working status and alarm information of the combined surge protector in real time, thereby realizing remote monitoring and management of the system.

[0073] Optionally, the first state may be that the first alarm device 360 is in an on state, and the second state may be that the first alarm device 360 is in an off state; or, the first state may be that the first alarm device 360 is in an off state, and the second state may be that the first alarm device 360 is in an on state.

[0074] In one embodiment, in combination Figure 5 and Figure 6 The first alarm device 360 includes two first alarm electrodes 361. The two first alarm electrodes 361 are connected to each other under the pressure of the slide plate 420, and the first reset member 410 applies a reset force to the slide plate 420 to keep away from the first alarm electrodes 361. When the combined surge protector is subjected to an excessive current or voltage shock, the tripping spring 430 is separated from the graphite gap unit 120, and the slide plate 420, driven by the first reset member 410, leaves the first alarm electrode 361, releases the pressure on the first alarm electrode 361, and the two first alarm electrodes 361 are separated, directly triggering the first alarm device 360 to send an alarm signal, achieving an immediate response with high reliability and accuracy.

[0075] In one embodiment, one end of the first warning electrode 361 is installed at intervals on the first installation cover 110 to obtain support force and provide stability to the end of the first warning electrode 361. Optionally, the first installation cover 110 has a first fixing groove for one end of the first warning electrode 361 to be inserted and fixedly installed.

[0076] Specifically, the installation end of the first warning electrode 361 is close to the second side 602, which is convenient for connection with the outside of the combined surge protector.

[0077] Specifically, the other ends of the two first warning electrodes 361 are close to the end of the graphite gap protection unit and are separated in the initial state. When the slide plate 420 is in the initial state, it presses against the first warning electrodes 361, pressing and contacting the other ends of the two first warning electrodes 361 to conduct. When the tripping spring piece 430 is separated from the graphite gap unit 120, the slide plate 420 is driven by the first reset member 410 to leave the first warning electrodes 361, and the two first warning electrodes 361 are restored to the separated state.

[0078] In one embodiment, the slide plate 420 is provided with a warning label 370. The working state of the first tripping structure 400 is obtained through the position of the warning label 370. Optionally, the normal projection of the first window 603 falls on the warning label 370, facilitating the user to externally observe the working state of the first tripping structure 400.

[0079] Optionally, the warning label 370 is a colored cardboard pasted on the slide plate 420. Specifically, the warning label 370 is a red cardboard or a green cardboard, which is selected according to actual requirements.

[0080] In some embodiments, in combination with Figure 4 、 Figure 7 and Figure 8 , the transfer conductive member 330 is electrically connected to the first end of the varistor 220 through the second tripping structure 500, and the second tripping structure 500 is used to separate from the first end of the varistor 220 at a second preset temperature. By designing a tripping failure mechanism, when the surge current is too large, the varistor 220 or the second tripping structure 500 generates heat through the current thermal effect. When the temperature reaches the operating temperature of the second tripping structure 500, the circuit can be automatically cut off, the arc can be quickly cut off, further damage to the equipment caused by the continuous burning of the arc can be prevented, and safety accidents such as component damage and fire can be prevented. The second tripping structure 500 is arranged between the transfer conductive member 330 and the varistor 220, making the tripping action of the second tripping structure 500 faster and more reliable, and increasing the reliability of the surge protector.

[0081] In one embodiment, in combination with Figure 7 and Figure 8The second tripping structure 500 includes a tripping electrode 510, a rotating member 520 and a second reset member 530. The rotating member 520 is rotatably mounted on the second mounting cover 210. The tripping electrode 510 is fixedly conductively connected to the transfer conductive member 330. The tripping electrode 510 is connected to the head end of the varistor 220 through a second solder. The melting point of the second solder is a second preset temperature. The second reset member 530 is mounted on the second mounting cover 210. The second reset member 530 is used to apply a reset force to the rotating member 520 so that the rotating member 520 drives the tripping electrode 510 to separate from the head end of the varistor 220.

[0082] When there is no overvoltage in the circuit, the varistor 220, the tripping electrode 510 and the switching conductive member 330 are turned on in sequence. When the surge current is too large, the temperature of the tripping electrode 510 and / or the head end of the varistor 220 reaches the second preset temperature, the second solder is melted, the tripping electrode 510 is separated from the head end of the varistor 220, and the rotating member 520, under the action of the reset force applied by the second reset member 530, accelerates and strengthens the separation of the tripping electrode 510 from the varistor 220, thereby disconnecting the entire circuit, and finally effectively protecting the electrical equipment from damage by overvoltage, with high reliability.

[0083] Optionally, the second preset temperature is 100°C to 300°C.

[0084] Optionally, the second solder may be an environmentally friendly solder.

[0085] Optionally, the tripping electrode 510 abuts against the rotating member 520 in an initial state, and when the rotating member 520 rotates, the tripping electrode 510 is directly and quickly driven away from the varistor 220 .

[0086] Optionally, the body of the varistor 220 and the tripping electrode 510 are respectively located on both sides of the second mounting cover 210 , and one end electrode of the varistor 220 passes through the second mounting cover 210 and is connected to the tripping electrode 510 through the second solder.

[0087] In one embodiment, a terminal of the varistor 220 is electrically connected to the second pin electrode 320 through a third connecting member 390 .

[0088] In one embodiment, in combination Figure 7 and Figure 8 The combined surge protector also includes a second alarm device 380. The second alarm device 380 is in a third state when the second tripping structure 500 is connected to the first end of the varistor 220. The second alarm device 380 is in a fourth state when the second tripping structure 500 is separated from the first end of the varistor 220. The third state and the fourth state are opposite.

[0089] Based on this, when the voltage-limiting protection module 200 is subjected to a lightning strike or overload current that exceeds its tolerance, the varistor 220 will respond quickly and trigger a tripping action, and the second alarm device 380 will be in the fourth state, alerting the outside world. The second alarm device 380 changes from the third state to the fourth state, and immediately sends an alarm signal to the user or the monitoring system, reminding timely inspection and processing to avoid subsequent equipment damage or safety accidents due to failure to discover the fault in time.

[0090] Optionally, the second alarm device 380 can be connected to the central control room via a remote monitoring system. In this way, even when the user is far away from the site, the user can also understand the working status and alarm information of the combined surge protector in real time, thereby realizing remote monitoring and management of the system.

[0091] Optionally, the third state may be that the second alarm device 380 is in the on state, and the fourth state may be that the second alarm device 380 is in the off state; or, the third state may be that the second alarm device 380 is in the off state, and the fourth state may be that the second alarm device 380 is in the on state.

[0092] In one embodiment, in combination Figure 7 and Figure 8 The second alarm device 380 includes two second alarm electrodes 381. The two second alarm electrodes 381 are connected to each other under the pressure of the rotating member 520, and the second reset member 530 applies a reset force to the rotating member 520 to move away from the second alarm electrodes 381. When the combined surge protector is subjected to an excessive current or voltage shock, the tripping electrode 510 is separated from the varistor 220, and the rotating member 520 is driven by the second reset member 530 to leave the second alarm electrode 381, and the pressure on the second alarm electrode 381 is released. The two second alarm electrodes 381 are separated, directly triggering the second alarm device 380 to send an alarm signal, achieving an immediate response with high reliability and accuracy.

[0093] In one embodiment, one end of the second warning electrode 381 is installed at intervals on the second installation cover 210 to obtain support force and provide stability to the end of the second warning electrode 381. Optionally, the second installation cover 210 has a second fixing groove for one end of the second warning electrode 381 to be inserted and fixedly installed.

[0094] Specifically, the installation end of the second warning electrode 381 is close to the second side 602, which is convenient for connection with the outside of the combined surge protector.

[0095] Specifically, the other ends of the two second warning electrodes 381 are close to the end of the varistor 220 and are separated in the initial state. When the rotating member 520 is in the initial state, it presses against the second warning electrodes 381, pressing the other ends of the two second warning electrodes 381 into contact and conduction. When the tripping electrode 510 is separated from the varistor 220, the rotating member 520 is driven by the second reset member 530 to move away from the second warning electrodes 381, and the two second warning electrodes 381 are restored to the separated state.

[0096] In one embodiment, in the initial state, the two sides of the rotating member 520 respectively abut against the tripping electrode 510 and the second warning electrode 381.

[0097] In one of the embodiments, the rotating member 520 is provided with a warning label. The operating state of the second tripping structure 500 can be known through the position of the warning label. Optionally, the normal projection of the second window 604 falls on the warning label, facilitating the user to observe the operating state of the second tripping structure 500 from the outside.

[0098] Generally, the combined surge protector is arranged in parallel with the device.

[0099] In summary, when the surge current flows into the product interior from the first pin electrode 310 and the second pin electrode 320, in the switching protection module 100, a discharge occurs in the gap between the graphite sheet 121 and the spacer 123, causing the first connecting member 340 to heat up. The heat is transferred to the protrusion of the first connecting member 340. When the temperature reaches the melting temperature of the first solder through the heat aggregation effect, the first reset member 410 pulls the slide plate 420, and the slide plate 420 pushes the tripping spring piece 430 to quickly separate from the protrusion of the first connecting member 340. The first warning electrode 361 in the first warning device 360 contacts and separates, so as to achieve the effects of arc extinguishing and remote warning.

[0100] When the surge current flows into the product interior from the first pin electrode 310 and the second pin electrode 320, in the voltage-limiting protection module 200, the varistor 220 heats up, and the heat is transferred to the end electrode of the varistor 220. When the temperature reaches the melting temperature of the second solder through the heat aggregation effect, the second reset member 530 pulls the rotating member 520, and the rotating member 520 pushes the tripping electrode 510 to quickly separate from the end electrode of the varistor 220. The second warning electrode 381 in the second warning device 380 contacts and separates, so as to achieve the effects of arc extinguishing and remote warning.

[0101] After the switching protection module 100 and the voltage-limiting protection module 200 are connected in series, when the transient overvoltage reaches a certain level, the graphite gap unit 120 (such as the discharge gap composed of the graphite sheet 121) can quickly discharge and conduct, releasing the overcurrent quickly into the ground. This fast response ability helps to effectively control at the initial stage of the surge, preventing further damage to subsequent equipment by the surge. In addition, since the threshold voltage of the varistor 220 can be selected to be relatively low in the series combination, and when the discharge gap quickly discharges and conducts, the series branch can provide a lower clamping voltage than a single varistor 220. This means that during the process of suppressing the surge, the system voltage can be stabilized at a lower level more quickly, thus protecting subsequent equipment more effectively. When there is no transient overvoltage acting, the parasitic capacitance 125 of the discharge gap is very small, almost isolating the varistor 220 from the system, so that there is almost no leakage current in the varistor 220, which helps to reduce the heating and aging speed of the varistor 220, thus slowing down the decline of its performance. Since the voltage-limiting protection module 200 is in a low leakage current state most of the time, its working load is greatly reduced, so its service life can be significantly extended.

[0102] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A combined surge protector, characterized in that, The combined surge protector includes: A switching-type protection module, including a first mounting cover and a graphite gap protection unit. The graphite gap protection unit is mounted in the first mounting cover, and a first pin electrode is electrically connected to the head end of the graphite gap protection unit. A voltage-limiting type protection module, including a second mounting cover and a varistor. The varistor is mounted in the second mounting cover, and a second pin electrode is electrically connected to the tail end of the varistor. A transfer conductive member. One end of the transfer conductive member is electrically connected to the tail end of the graphite gap protection unit, and one end of the transfer conductive member is electrically connected to the head end of the varistor, so that the switching-type protection module and the voltage-limiting type protection module are connected in series.

2. The modular surge protector according to claim 1, wherein: The transfer conductive member is electrically connected to the tail end of the graphite gap protection unit through a first tripping structure. The first tripping structure is used to separate from the tail end of the graphite gap protection unit at a first preset temperature.

3. The modular surge protector according to claim 2, wherein: The first tripping structure includes a first reset member, a sliding plate, and a tripping elastic piece. The sliding plate is slidably mounted in the first mounting cover. The tripping elastic piece is arranged on the sliding plate. The tripping elastic piece is fixedly and electrically connected to the transfer conductive member. The tripping elastic piece is connected to the tail end of the graphite gap protection unit through a first solder. The melting point of the first solder is the first preset temperature. The first reset member is mounted in the first mounting cover. The first reset member is used to apply a reset force to the sliding plate, so that the sliding plate drives the tripping elastic piece to separate from the tail end of the graphite gap protection unit.

4. The modular surge protector according to claim 3, wherein: The combined surge protector further includes a first connecting member. The first connecting member is fixedly and electrically connected to the tail end of the graphite gap protection unit. The tripping elastic piece is connected to the first connecting member through the first solder. At least one of the first connecting member and the tripping elastic piece is provided with a convex block. The convex block is connected to the first solder.

5. The modular surge protector according to claim 3, wherein: The combined surge protector further includes a first warning device. The first warning device is in a first state when the first tripping structure is connected to the tail end of the graphite gap protection unit, and the first warning device is in a second state when the first tripping structure is separated from the tail end of the graphite gap protection unit. The first state and the second state are opposite.

6. The modular surge protector according to claim 5, characterized in that: The first warning device includes two first warning electrodes. The two first warning electrodes are abutted and conducted under the pressing of the sliding plate. The first reset member applies a reset force to the sliding plate away from the first warning electrodes. One end of the first warning electrode is spacedly mounted on the first mounting cover. The mounting end of the first warning electrode is close to the head end of the graphite gap protection unit. The sliding plate is provided with a warning label.

7. The modular surge protector according to claim 1, wherein: The transfer conductive member is electrically connected to the head end of the varistor through a second tripping structure. The second tripping structure is used to separate from the head end of the varistor at a second preset temperature.

8. The modular surge protector according to claim 7, wherein: The second tripping structure includes a tripping electrode, a rotating member and a second resetting member, wherein the rotating member is rotatably mounted on the second mounting cover, the tripping electrode is fixedly conductively connected to the transition conductive member, the tripping electrode is connected to the head end of the varistor via a second solder, the melting point of the second solder is the second preset temperature, the second resetting member is mounted on the second mounting cover, and the second resetting member is used to apply a resetting force to the rotating member so that the rotating member drives the tripping electrode to separate from the head end of the varistor.

9. The modular surge protector according to claim 7, characterized in that: The combined surge protector also includes a second alarm device, which is in a third state when the second tripping structure is connected to the first end of the varistor, and is in a fourth state when the second tripping structure is separated from the first end of the varistor. The third state is opposite to the fourth state.

10. The modular surge protector according to any one of claims 1 to 9, characterized in that: The combined surge protector further comprises a housing, wherein the switch type protection module and the voltage limiting type protection module are installed side by side in the housing; The housing has a first side and a second side that are arranged opposite to each other, the end of the graphite gap protection unit and the head end of the varistor are arranged close to the first side, and the head end of the graphite gap protection unit and the end of the varistor are arranged close to the second side; The first side has a first window, and the projection of the first window along the normal direction thereof is located at the end of the graphite gap protection unit; The first side has a second window, and the projection of the second window along its normal direction is located at the head end of the varistor; The transfer conductive member is located between the switch type protection module and the voltage limiting type protection module.

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