Surge protection module and surge protection device

Abstract

The application discloses a kind of surge protection module and surge protection device, surge protection module includes: support frame, support frame includes mounting plate, electrode via is provided on mounting plate;Voltage-dependent resistor, voltage-dependent resistor is installed in the first side of mounting plate, voltage-dependent resistor has first electrode and second electrode, the end of first electrode is bent in the direction of end terminal and is formed with the first pin of first slot;Electrode connector, electrode connector is installed in the second side of mounting plate, one end of electrode connector is welded with the second electrode of voltage-dependent resistor by electrode via, the other end of electrode connector is bent in the direction of end terminal and is formed with the second pin of second slot;Support frame is provided with first support part and second support part, first support part inserts first slot, second support part inserts second slot.The technical scheme provided by the application can increase the stability of the pin of surge protection module when plugging.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of overvoltage and overcurrent protection, and in particular to a surge protection module and a surge protection device. BACKGROUND

[0002] Lightning is one of the top ten natural disasters. With the progress of technology, devices are becoming more and more intelligent and integrated, and are becoming more and more sensitive to lightning-induced transient overvoltage - surge. In addition, the start and stop of high-power devices can also produce surges. Surge protectors (or surge protection devices) can prevent damage to devices caused by surges and are widely used in communication, construction, rail transit, power, new energy, petroleum and chemical industries. When a sharp current or voltage is generated in an electrical circuit due to lightning or external interference, the surge protector can conduct in a very short time, discharge the current, and limit the voltage to a low level, thereby avoiding damage to other devices in the circuit caused by surges.

[0003] In a surge protector for a power distribution system, the commonly used element is a pressure-sensitive resistor. The pressure-sensitive resistor has a very high resistance under normal working conditions, equivalent to a circuit breaking state, and when the voltage in the circuit exceeds the predetermined value, its resistance drops sharply and is in a conducting state, which can discharge a large amount of current and limit the overvoltage level.

[0004] However, after a long period of use, the pressure-sensitive resistor will gradually age, the leakage current will gradually increase, the thermal balance will be destroyed, and the product temperature will continuously rise. In order to prevent fires caused by overheating of the pressure-sensitive resistor, a thermal protection tripping device is usually provided in the surge protector to disconnect the pressure-sensitive resistor from the circuit when the temperature rises. After the pressure-sensitive resistor is disconnected from the circuit, the surge protector is already invalid and will lose its protective effect on the device. The invalid surge protector is provided with a state indicator to prompt maintenance personnel to replace it in time. In some unattended situations, a remote signaling device also needs to be designed to remotely indicate the failure state of the surge protector.

[0005] At present, the existing surge protector is usually provided with a plug pin for plug-in connection, which is connected with the electrode of the surge protector. If too much force is applied during plugging, the plug pin can be tilted. SUMMARY

[0006] The purpose of the present application is to solve the problem that the existing surge protector is tilted when plugging due to too much force.

[0007] In order to achieve the above-mentioned purpose, the present application provides a surge protection module, which comprises:

[0008] A bearing frame comprising a mounting plate provided with electrode through holes on both sides;

[0009] A pressure sensitive resistor is mounted on the first side of the mounting plate, the pressure sensitive resistor has a first electrode and a second electrode, one end of the first electrode is bent to form a first pin with a first slot in a direction away from the end terminal;

[0010] An electrode connecting piece is mounted on the second side of the mounting plate, one end of the electrode connecting piece is welded with the second electrode of the pressure sensitive resistor through the electrode via hole, and the other end of the electrode connecting piece is bent to form a second pin with a second slot in a direction away from the end terminal;

[0011] The first support part is inserted into the first slot, and the second support part is inserted into the second slot.

[0012] Preferably, the pressure sensitive resistor comprises a pressure sensitive resistor body, one side of the pressure sensitive resistor body is provided with the first electrode, and the other side is provided with the second electrode, wherein the first electrode is mounted on the bearing frame away from the mounting plate;

[0013] The first electrode is an integrally formed sheet structure, the first electrode comprises a connecting part connected to the pressure sensitive resistor body and an extension part extending from the pressure sensitive resistor body, and the end of the extension part forms the first pin.

[0014] Preferably, the extension part has two parallel and opposite bends near the first pin.

[0015] Preferably, the electrode connecting piece is integrally formed by a plate body; wherein the electrode connecting piece comprises a connecting body, a connecting part formed at one end of the connecting body for welding with the second electrode of the pressure sensitive resistor, and the second pin formed by bending at the other end.

[0016] Preferably, the electrode connecting piece has two parallel and opposite bends near the second pin.

[0017] Preferably, the second electrode of the pressure sensitive resistor is a sheet structure, and the second electrode has a welding part protruding towards the electrode via hole formed by bending, and the connecting part of the electrode connecting piece is welded on the surface of the welding part facing the electrode via hole.

[0018] Preferably, the bearing frame is provided with an error prevention pin for preventing the first pin and the second pin from being inserted incorrectly.

[0019] Preferably, the surge protection module further comprises a tripping mechanism mounted on the second side of the mounting plate, the tripping mechanism being configured to be in a first state when the electrode connector is welded with the second electrode, and the tripping mechanism being automatically switched from the first state to a second state when the welding between the electrode connector and the second electrode is melted.

[0020] According to another aspect of the present application, there is also provided a surge protection device comprising a base and a surge protection module as described above;

[0021] The base is provided with plug holes corresponding to the first and second pins respectively and used for electrical connection with a line, and the first and second pins of the surge protection module are plugged into the plug holes correspondingly.

[0022] The base is further provided with a remote signaling mechanism configured to be linked with the tripping mechanism, the remote signaling mechanism indicating a first state signal when the tripping mechanism is in the first state, and indicating a second state signal when the tripping mechanism is in the second state.

[0023] In the technical solution provided by the present application, the first support part is inserted into the first slot of the first pin, and the second support part is inserted into the second slot of the second pin, so as to effectively support the first and second pins and increase the stability of plugging, thereby avoiding the situation that the first and second pins are skewed due to excessive force in the plugging process. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 FIG. 1 is a structure schematic diagram of the surge protection module from one side according to an embodiment of the present application;

[0025] Figure 2 FIG. 2 is a structure schematic diagram of the surge protection module from another side;

[0026] Figure 3 FIG. 3 is a structure schematic diagram of the carrier from one side in the surge protection module;

[0027] Figure 4 FIG. 4 is a structure schematic diagram of the carrier from another side;

[0028] Figure 5 FIG. 5 is a structure schematic diagram of the varistor from one side;

[0029] Figure 6 FIG. 6 is a structure schematic diagram of the varistor from another side;

[0030] Figure 7 FIG. 7 is a structure schematic diagram of the electrode connector;

[0031] Figure 8 schematic view of a surge protection module according to another embodiment of the present application, in which the tripping mechanism is in the first state;

[0032] Figure 9 schematic view of a surge protection module according to another embodiment of the present application, in which the tripping mechanism is in the second state;

[0033] Figure 10 schematic view of a surge protection module according to another embodiment of the present application, in which the tripping mechanism is in the second state;

[0034] Figure 11 schematic view of a surge protection module according to another embodiment of the present application, in which the tripping mechanism is in the second state;

[0035] BRIEF DESCRIPTION OF DRAWINGS

[0036] 1 - housing; 2 - carrier; 21 - mounting plate; 211 - electrode via; 22 - first support part; 23 - second support part; 24 - pivot; 25 - spring connection part; 26 - positioning post; 27 - anti-misplug pin; 3 - varistor; 31 - varistor body; 32 - first electrode; 321 - connection part; 322 - first pin; 33 - second electrode; 331 - soldering part; 4 - electrode connection piece; 41 - connection body; 42 - connection part; 43 - second pin; 44 - positioning groove; 5 - rotating member; 6 - energy storage spring; 100 - surge protection module; 200 - base. DETAILED DESCRIPTION

[0037] Example implementations are now described with reference to the following drawings. The example implementations, however, can be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example implementations to those skilled in the art. The accompanying drawings are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification. The drawings are not intended to be restrictive in any way. Throughout the drawings, like references numerals denote like features, and thus repeated description is omitted for clarity.

[0038] In addition, the described features, structures, or characteristics can be combined in any suitable manner in one or more implementations. In the following description, numerous specific details are provided to give a thorough understanding of implementations of the disclosure. One skilled in the relevant art will recognize, however, that the implementations of the disclosure can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, methods, devices, implementations, materials, and so forth have not been described in detail in order to avoid obscuring aspects of the disclosure.

[0039] For ease of description, spatially relative terms, such as "upper", "lower", "left", "right", and the like, can be used herein for the purpose of illustrating one element or feature's relationship to another element or feature, as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation, in addition to the orientations depicted in the figures. For example, if a device is inverted, elements described as being on the "lower" side of other elements or features would then be oriented on "upper" sides of the other elements or features. Thus, the exemplary term "lower" can encompass both an orientation of below or above. The devices can be otherwise oriented (e.g., rotated 90 degrees or located in any other orientation) and the spatially relative descriptions used herein interpreted accordingly.

[0040] The present application provides a surge protection module, as shown in Figure 1 and Figure 2 The surge protection module comprises:

[0041] A carrier frame 2, which comprises a mounting plate 21, and an electrode through hole 211 (see Figure 3 and Figure 4 ) is arranged on the mounting plate 21;

[0042] A varistor 3 is mounted on the first side of the mounting plate 21, and the varistor 3 has a first electrode 32 and a second electrode 33, and one end of the first electrode 32 is bent away from the end terminal to form a first pin 322 with a first slot;

[0043] An electrode connecting piece 4 is mounted on the second side of the mounting plate 21, one end of the electrode connecting piece 4 is welded with the second electrode 33 of the varistor 3 through the electrode through hole 211, and the other end of the electrode connecting piece 4 is bent away from the end terminal to form a second pin 43 with a second slot;

[0044] Wherein, the carrier frame 2 is provided with a first support part 22 and a second support part 23, the first support part 22 is inserted into the first slot, and the second support part 23 is inserted into the second slot.

[0045] In the technical scheme provided by the present application, by arranging the first support part 22 on the carrier frame 2 to be inserted into the first slot of the first pin 322, and the second support part 23 to be inserted into the second slot of the second pin 43, the first pin 322 and the second pin 43 can be effectively supported, and the stability of plugging is increased, so that the situation that the first pin 322 and the second pin 43 are skewed due to excessive force in the plugging process can be avoided.

[0046] In one specific embodiment of the present application, the specific structure of the carrier frame 2 is as shown in Figure 3 andFigure 4 As shown, the carrier 2 comprises a mounting plate 21 with electrode through holes 211 and a frame arranged at the periphery of the mounting plate 21, wherein a first support portion 22 and a second support portion 23 are arranged at one side of the mounting plate 21 and protrude outward.

[0047] The carrier 2 is further provided with an error-proof pin 27 for preventing the first pin 322 and the second pin 43 from being inserted into the wrong holes. When the first pin 322 and the second pin 43 of the surge protection module are respectively inserted into the corresponding holes of the base, the error-proof pin 27 is correspondingly inserted into the error-proof hole of the base. The first pin 322 and the second pin 43 can be prevented from being inserted into the wrong holes.

[0048] In addition, the second side of the mounting plate 21 is further provided with a structure for mounting a tripping mechanism, which will be described below together with the tripping mechanism.

[0049] In this embodiment, the specific structure of the pressure sensitive resistor 3 is as shown in Figure 5 and Figure 6 which comprises a pressure sensitive resistor body 31, one side of the pressure sensitive resistor body 31 is provided with the first electrode 32, and the other side is provided with the second electrode 33, wherein the pressure sensitive resistor 3 is mounted on the first side of the mounting plate 21, and the first electrode 32 faces away from the mounting plate 21, as shown in Figure 1 .

[0050] The first electrode 32 is an integrally formed sheet structure, which comprises a connecting portion 321 connected to the pressure sensitive resistor body 31 and an extension portion extending from the pressure sensitive resistor body 31, and the end of the extension portion forms the first pin 322.

[0051] Preferably, the connecting portion 321 of the first electrode 32 is a ring-shaped sheet connected to the pressure sensitive resistor body 31, the extension portion extends from the ring-shaped sheet, and the end of the extension portion is bent away from the end to form the first pin 322.

[0052] The extension portion has two parallel and opposite bends near the first pin 322, as shown in Figure 5 at A and B. The two parallel and opposite bends not only make the first pin 322 have elasticity when inserted, but also make the first pin 322 deviate from the connecting portion 321 towards the first support portion 22 in a direction perpendicular to the mounting plate 21, so that the first support portion 22 is inserted into the first slot of the first pin 322.

[0053] The second electrode 33 is an integrally formed sheet structure, which is attached to the second side of the piezoresistor body 31, and is preferably a ring-shaped sheet. A welding portion 332 is formed on the second electrode 33 by bending, which protrudes towards the electrode via hole 221, and the connecting portion 42 of the electrode connecting piece 4 is attached to the surface of the welding portion 332 facing the electrode via hole 211. The connecting mode of the electrode connecting piece 4 to the second electrode 33 through the electrode via hole 211 can reduce the thickness of the surge protection module.

[0054] In this embodiment, the electrode connecting piece 4 is integrally formed with the plate body, as shown in FIG. 4, which includes a connecting body 41, a connecting portion 42 formed at one end of the connecting body 41 for welding with the second electrode 33 of the piezoresistor 3, and the second pin 43 formed by bending at the other end. Figure 7

[0055] Preferably, the electrode connecting piece 4 has two parallel and opposite bending positions near the second pin 43, as shown in FIG. 4, the bending positions at C and D. By providing the two bending positions, not only can the elasticity of the second pin 43 during plugging be increased, but also the second pin 43 can be offset in a direction perpendicular to the mounting plate 21 compared to the direction of the connecting body 41 towards the second support portion 23, so that the second support portion 23 is inserted into the second slot of the second pin 43. Figure 7

[0056] In order to effectively weld the connecting portion 42 of the electrode connecting piece 4 and the electrode of the piezoresistor 3 together, an opening is provided on the connecting portion 42, so that the solder can enter the opening, ensuring sufficient solder welding between the connecting portion 42 and the piezoresistor 3.

[0057] The connecting body 41 is provided with a positioning slot 44 or a positioning hole for positioning. When the electrode connecting piece 4 is installed on the carrier frame 2 of the surge protection module, the electrode connecting piece 4 can be positioned by cooperating with the positioning column on the carrier frame 2 through the positioning slot 44 or the positioning hole. As shown in FIG. 4, the positioning slot 44 provided on the connecting body 41 cooperates with the positioning column 26 on the carrier frame 2 to position the electrode connecting piece 4, so as to ensure the stability of the electrode connecting piece 4 on the carrier frame. Figure 2

[0058] ​​​The surge protection module further comprises a tripping mechanism installed on the second side of the mounting plate 21, which is arranged to be in a first state when the electrode connecting piece 4 is welded to the second electrode 33, and automatically change from the first state to a second state when the welding between the electrode connecting piece 4 and the second electrode 33 is melted.

[0059] Specifically, as shown in Figure 8 and Figure 9 , the tripping mechanism comprises a rotating body 5 rotatably installed on the second side of the mounting plate 21 and a potential spring 6 arranged between the rotating body 5 and the carrier frame 2. Wherein, the rotating body 5 is rotatably installed on the rotating shaft 24 of the mounting plate 21, one end of the potential spring 6 is connected to the rotating body 5, and the other end is connected to the spring connecting part 25 of the carrier frame 2.

[0060] When the electrode connecting piece 4 and the second electrode 33 are in a welded state, the welding between the electrode connecting piece 4 and the second electrode 33 limits the rotating body 5 to be in a first position, and the potential spring 6 remains in a potential state of compression or stretching; when the solder between the electrode connecting piece 4 and the second electrode 33 is melted, the potential spring 6 drives the rotating body 5 to rotate to a second position by elastic force, so as to separate the electrode connecting piece 4 from the second electrode 33 through the rotating body 5.

[0061] Figure 8 The position where the rotating body 5 is limited when the electrode connecting piece 4 and the second electrode 33 are in a welded state is shown, at this time the potential spring 6 is in a potential state of stretching between the rotating body 5 and the carrier frame 2, of course, the potential spring 6 can also be arranged in a potential state of contraction, for example, by changing the installation mode of the potential spring 6. When the varistor 3 fails due to deterioration, short circuit and the like, the temperature gradually rises, and the solder between the second electrode 33 of the varistor and the electrode connecting piece 4 is melted, the restriction on the rotating body 5 is eliminated, and the rotating body 5 rotates around the rotating shaft 24 under the elastic force of the potential spring 6 in the state of stretching, from the first position to the second position, as shown in Figure 9 .

[0062] Those skilled in the art can understand that the tripping mechanism is not limited to the structure as described above in the embodiment, other forms of tripping mechanism capable of changing state to isolate the electrode connecting piece 4 and the second electrode 33 when the solder between the electrode connecting piece 4 and the second electrode 33 is melted, for example, a translation component capable of translating relative to the carrier frame 2 can be provided, a spring is provided between the translation component and the carrier frame 2, when the electrode connecting piece 4 and the second electrode 33 are in the welding state, the translation component is limited in the first position, the spring is in the compressed or stretched potential state, when the welding is melted, the translation component moves to the isolation between the welding part of the electrode connecting piece 4 and the second electrode 33 under the elastic force of the spring.

[0063] In addition, the surge protection module further comprises a housing 1, the carrier frame 2, the voltage-dependent resistor 3 and the electrode connecting piece 4 are located in the housing 1, and the state of the surge protection module viewed from the outside is as shown in Figure 10

[0064] According to another aspect of the present application, a surge protection device is also provided, which comprises a base 200 and a surge protection module 100 as described above;

[0065] Wherein, the base 200 is provided with plug holes corresponding to the first pin 322 and the second pin 43 respectively and used for electrical connection with the line, and the first pin 322 and the second pin 43 of the surge protection module are plugged into the plug holes correspondingly;

[0066] The base 200 is further provided with a remote signaling mechanism, which is arranged in linkage with the tripping mechanism, and when the tripping mechanism is in the first state, the remote signaling mechanism indicates a first state signal, and when the tripping mechanism is in the second state, the remote signaling mechanism indicates a second state signal. Remote indication of the failure state of the surge protection device is realized.

[0067] The remote signaling mechanism is not the focus of the present application, and those skilled in the art can understand that the remote signaling mechanism has various implementation manners in the prior art, which will not be described in detail here.

[0068] The preferred embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited thereto. Within the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application, including various specific technical features combined in any suitable manner. In order to avoid unnecessary repetition, various possible combination manners are not described again in the present application. However, these simple modifications and combinations should also be regarded as the disclosed content of the present application and belong to the protection scope of the present application.​

Claims

1. A surge protection module, characterized in that, The surge protection module includes: The support frame includes a mounting plate with electrode through holes on both sides; one side of the mounting plate has a first support portion and a second support portion protruding outward. A varistor is mounted on a first side of the mounting plate. The varistor has a first electrode and a second electrode. One end of the first electrode is bent away from the end of the terminal to form a first pin with a first slot. An electrode connector is mounted on the second side of the mounting plate. One end of the electrode connector is welded to the second electrode of the varistor through the electrode through-hole, and the other end of the electrode connector is bent away from the end of the terminal to form a second pin with a second slot. The support frame is provided with a first support part and a second support part. The first support part on the support frame is inserted into the first slot of the first pin, and the second support part is inserted into the second slot of the second pin, effectively supporting the first pin and the second pin. The varistor includes a varistor body, a first electrode is provided on one side of the varistor body, and a second electrode is provided on the other side, wherein the first electrode is mounted on the support frame away from the mounting plate; The first electrode is an integrally formed sheet structure, and the first electrode includes a connecting part that is attached to the varistor body and an extending part that extends out of the varistor body. The end of the extending part is formed with the first pin. The protruding part has two parallel and opposite bends near the first pin; The support frame is provided with anti-misalignment pins to prevent the first pin and the second pin from being inserted incorrectly.

2. The surge protection module according to claim 1, characterized in that, The electrode connector is integrally formed from a plate; wherein, the electrode connector includes a connecting body, a connecting portion formed at one end of the connecting body for welding to the second electrode of the varistor, and a second pin formed by bending at the other end.

3. The surge protection module according to claim 2, characterized in that, The electrode connector has two parallel bends in opposite directions near the second pin.

4. The surge protection module according to claim 2, characterized in that, The second electrode of the varistor has a sheet structure, and a welding part protruding towards the electrode through hole is formed on the second electrode by bending. The connecting part of the electrode connector is attached to the surface of the welding part facing the electrode through hole.

5. The surge protection module according to any one of claims 1-4, characterized in that, The surge protection module also includes a tripping mechanism, which is installed on the second side of the mounting plate. The tripping mechanism is configured such that when the electrode connector is welded and fixed to the second electrode, the tripping mechanism is in a first state, and when the weld between the electrode connector and the second electrode melts, the tripping mechanism automatically switches from the first state to the second state.

6. A surge protection device, characterized in that, The surge protection device includes a base and a surge protection module according to claim 5; The base is provided with plug holes corresponding to the first pin and the second pin respectively and used for electrical connection with the line. The first pin and the second pin of the surge protection module are inserted into the plug holes respectively. The base is also provided with a remote signaling mechanism, which is configured to be linked with the tripping mechanism. When the tripping mechanism is in the first state, the remote signaling mechanism indicates a first state signal, and when the tripping mechanism is in the second state, the remote signaling mechanism indicates a second state signal.

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