Combustion-proof lightning protection device structure

Abstract

The utility model discloses a combustion-proof lightning protection device structure, which comprises a circuit protection device, a tripping mechanism, an insulation sleeve and a first pin, and is characterized in that the insulation sleeve is wrapped outside the circuit protection device and the tripping mechanism; the tripping mechanism comprises a ceramic box body and a second pin, and the ceramic box body is tightly attached to the circuit protection device; a welding leg which is connected with a circuit protection device and can transfer heat is arranged in the ceramic box body, and a winding column is arranged in the ceramic box body; the second pin comprises a fixed part, an elastic end and a limiting end, the fixed part is sleeved on the winding column, the elastic end is welded on the welding leg through low-temperature tin, and the limiting end is clamped on the ceramic box body and extends out of the outer side of the insulating sleeve; and the first pin also extends out of the outer side of the insulating sleeve. The circuit protection device is heated due to overvoltage and overcurrent to melt low-temperature tin at the weld leg, and the elastic end of the second pin is separated from the weld leg under the driving of self elastic stored force, so that overheat combustion is prevented, the electronic equipment is prevented from being damaged by lightning stroke, and the effects of combustion prevention and lightning stroke prevention are achieved.

Description

Technical Field

[0001] The utility model relates to the field technology of lightning arrester equipment, in particular to an anti-combustion lightning protection device structure. Background Art

[0002] At present, in order to prevent burning, traditional lightning protection devices usually use multiple anti-expansion devices such as temperature fuses or quartz sand to achieve flame retardancy. If you want to achieve burning prevention, you need to make a lightning protection module with mechanical tripping to ensure effective tripping.

[0003] Existing lightning protection devices using thermal fuses cannot effectively prevent combustion when exposed to high currents due to their inherent characteristics and imperfect production processes. Adding quartz sand and lightning protection modules to the product is expensive and complex, requiring significant manpower and material resources to achieve effective lightning protection. Furthermore, existing lightning protection devices are bulky and lack universality in power and signal configurations, making them unsuitable for use in confined environments. This limits their application.

[0004] Therefore, existing lightning protection devices should be improved to solve the above problems. Utility Model Content

[0005] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide an anti-burning and lightning protection device structure. The lightning protection device structure is formed by combining a tripping mechanism with a circuit protection device and coating the entire structure with an insulating layer. The circuit protection device generates heat due to overvoltage and overcurrent to melt the low-temperature tin at the soldering foot. The elastic end of the second pin is driven by its own elastic stress accumulation to detach from the circuit protection device, preventing overheating and combustion, while avoiding damage to the connected electronic equipment by lightning, thereby achieving an anti-burning effect and also reaching the level of a lightning arrester.

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

[0007] A flame-proof and lightning-proof device structure includes a circuit protection device, a tripping mechanism, an insulating sleeve and a first pin, wherein the insulating sleeve is wrapped around the outside of the circuit protection device and the tripping mechanism; the tripping mechanism includes a ceramic box body and a second pin installed in the ceramic box body, and the ceramic box body is tightly attached to the circuit protection device; a welding foot connected to the circuit protection device and capable of transferring heat from the circuit protection device is provided in the ceramic box body, and a winding column is provided in the ceramic box body corresponding to the second pin; the second pin includes a fixed portion and an elastic end and a limit end connected to both ends of the fixed portion, the fixed portion is sleeved on the winding column, the elastic end is soldered to the welding foot by low-temperature tin, and the limit end is clamped on the ceramic box body and extends outside the insulating sleeve; the first pin also extends outside the insulating sleeve.

[0008] As a preferred scheme: the ceramic box body is provided with a through hole in the inner side, and a lead wire connected with the circuit protection device is arranged in the ceramic box body; the front end of the lead wire extends upward from the through hole to form the soldering pin; and the elastic end of the second pin is connected to the soldering pin by low-temperature soldering.

[0009] As a preferred scheme: the rear end of the lead wire extends outward from the insulating sleeve to form a third pin for signal detection; and the third pin and the second pin form a signal monitoring end.

[0010] As a preferred scheme: the ceramic box body comprises a base and a cover, a plurality of positioning columns are arranged in the inner side of the base, and a plurality of positioning holes are arranged on the cover corresponding to the plurality of positioning columns, and the positioning columns are inserted into the positioning holes.

[0011] As a preferred scheme: the through hole is arranged in the inner side of the base, and a containing groove is arranged on the lower surface of the base and is in communication with the through hole; and the lead wire is located in the containing groove.

[0012] As a preferred scheme: an embedded edge for cooperating with the cover is arranged on the upper portion of the base, the embedded edge is embedded in the inner side of the cover, and a notch for the limiting end of the second pin to extend out is arranged on the embedded edge and the edge of the cover corresponding to the limiting end of the second pin; and the second pin is clamped in the notch.

[0013] As a preferred scheme: the circuit protection device is one of a discharge tube, a pressure-sensitive resistor, a transient voltage suppressor, a self-resetting fuse and a thermistor, or a combination of two thereof.

[0014] As a preferred scheme: the circuit protection device is a combination of a discharge tube and a pressure-sensitive resistor.

[0015] As a preferred scheme: the inner side of the cover corresponds to the limiting space of the second pin when the second pin is tripped.

[0016] As a preferred scheme: the lower surface of the base is concavely provided with an avoiding space, and the through hole and the containing groove are located in the avoiding space.

[0017] Compared with the prior art, the utility model has obvious advantages and beneficial effects, specifically, according to the above technical scheme, the tripping mechanism is combined with the circuit protection device and an insulating layer is coated on the whole to form a lightning protection device structure, the soldering pin is melted by low-temperature tin due to the heating of the circuit protection device caused by overvoltage and overcurrent, the elastic end of the second pin is driven by the elastic stress accumulation of the elastic end itself to separate from the circuit protection device, overheat combustion is prevented, the connected electronic equipment is prevented from being damaged by lightning, the effect of preventing combustion is achieved, and the grade of the lightning protection device is also achieved.

[0018] The lightning protection device structure has the following advantages:

[0019] First, it can be combined with the circuit board in plug-in or surface mount (SMT) mode, with a small overall size, which reduces a lot of plug-in and surface mount work and reduces board layout space.

[0020] Second, the tripping mechanism adopts mechanical tripping, which makes the tripping effect safer and more reliable.

[0021] Third, it adopts high integration, simple and convenient selection and strong flexibility.

[0022] Fourth, it has two-pin and three-pin solutions. The two-pin solution can directly replace the traditional solution without the user having to change the board; the three-pin solution is a solution with remote signaling, which can be linked with the user's equipment. Once damage or failure occurs, the communication function of the user's equipment can be used to provide timely feedback on the product status to the user, achieving intelligent notification management effects.

[0023] In order to more clearly illustrate the structural features and effects of the present invention, it is described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional schematic diagram of a two-legged lightning protection device of the present invention;

[0025] Figure 2 for Figure 1 AA cross-sectional view;

[0026] Figure 3 This is an exploded perspective diagram of a two-pin lightning protection device of the present invention;

[0027] Figure 4 This is an exploded perspective diagram of the two-pin lightning protection device of the present invention from another perspective;

[0028] Figure 5 This is a three-dimensional schematic diagram of the effective state of the two-pin lightning protection device of the utility model;

[0029] Figure 6 This is a three-dimensional schematic diagram of the failure state of the two-pin lightning protection device of the utility model;

[0030] Figure 7 This is a three-dimensional schematic diagram of a tripod lightning protection device of the present invention;

[0031] Figure 8 This is an exploded perspective diagram of a tripod-type lightning protection device of the present invention;

[0032] Figure 9 This is an exploded perspective diagram of the tripod type lightning protection device of the present invention from another perspective;

[0033] Figure 10This is a three-dimensional schematic diagram of the effective state of the tripod type lightning protection device of the utility model;

[0034] Figure 11 This is a three-dimensional schematic diagram of the failure state of the tripod type lightning protection device of the utility model;

[0035] Figure 12 This is a schematic diagram of the circuit connection of the two-pin lightning protection device of the utility model;

[0036] Figure 13 This is a schematic diagram of the circuit connection of a three-pin lightning protection device of the present invention.

[0037] Description of the accompanying drawings:

[0038] 10. Circuit protection device; 20. Tripping mechanism; 21. Ceramic box body; 211. Base; 2111. Positioning column; 2112. Embedded edge; 2113. Avoidance space; 2114. Through hole; 2115. Accommodation groove; 212. Cover; 2121. Positioning hole; 2122. Limiting space; 213. Notch; 22. Second pin; 221. Fixing portion; 222. Elastic end; 223. Limiting end; 23. Solder foot; 24. Winding column; 25. Wire; 30. Insulation sleeve; 40. First pin; 50. Third pin. DETAILED DESCRIPTION

[0039] The utility model Figures 1 to 13 As shown, a structure of an anti-burning and lightning protection device includes a circuit protection device 10, a tripping mechanism 20, an insulating sleeve 30 and a first pin 40, wherein:

[0040] The circuit protection device 10 is one of a discharge tube, a varistor, a transient suppression diode, a resettable fuse, and a thermistor, or a combination of two thereof. In addition to the devices listed above, other overcurrent and overvoltage protection devices may also be used. In this embodiment, the circuit protection device 10 is a combination of a discharge tube and a varistor. The discharge tube and the varistor are used together to provide overvoltage protection. In particular, in surge current protection, the combination of the discharge tube and the varistor can provide the varistor with stronger surge resistance, allowing it to cope with more complex lightning strike application environments with a minimal size. At the same time, it can prevent the varistor from burning due to current flow or power frequency. This combination utilizes the fast response characteristics of the varistor and the high voltage resistance characteristics of the discharge tube, effectively improving the overall protection effect of the lightning protection device.

[0041] The tripping mechanism 20 includes a ceramic box body 21 and a second pin 22 installed in the ceramic box body 21. The ceramic box body 21 is tightly attached to the circuit protection device 10. A welding foot 23 connected to the circuit protection device 10 and capable of transferring heat from the circuit protection device 10 is provided in the ceramic box body 21, and a winding column 24 is provided in the ceramic box body 21 corresponding to the second pin 22. The ceramic material absorbs heat stably and transfers heat, and can effectively transfer the heat generated by the circuit protection device 10 to the welding foot 23. The second pin 22 includes a fixed portion 221, an elastic end 222 connected to both ends of the fixed portion 221, and a stopper end 223. The fixed portion is mounted on the winding column 24, and the elastic end 222 is soldered to the solder leg 23 using low-temperature tin (low-temperature tin has a melting point of 160 degrees Celsius). During soldering, the elastic end 222 is elastically bent to the solder leg 23 for soldering, so the elastic end 222 has elastic stress storage (energy storage). When the low-temperature tin melts, the elastic stress will cause the elastic end 222 to separate from the solder leg 23. The stopper end 223 is clamped to the ceramic box 21 and extends outside the insulating sleeve 30 to provide support for the stored force of the elastic end 222. The second pin 22 as a whole is in the form of a torsion spring. The connection between the elastic end 222 and the solder leg 23 indicates an effective circuit connection, while the separation between the elastic end 222 and the solder leg 23 indicates a failed circuit disconnection. The first pin 40 also extends outside the insulating sleeve 30 in the same direction as the second pin 22.

[0042] A through hole 2114 is provided on the inner side of the ceramic box body 21, and a wire 25 connected to the circuit protection device 10 is provided in the ceramic box body 21; the front end of the wire 25 extends upward from the through hole 2114 to form the soldering foot 23, and the elastic end 222 of the second pin 22 is soldered to the soldering foot 23 by low-temperature tin, so that the first pin 40, the circuit protection device 10, the second pin 22 and the working equipment are electrically connected.

[0043] It should be noted that when the tail end of the wire 25 does not extend outside the insulating sleeve 30, the lightning protection device only has the first pin 40 and the second pin 22. When the rear end of the wire 25 extends outside the insulating sleeve 30 to form the third pin 50 for signal detection, the third pin 50 and the second pin 22 form the signal monitoring terminal.

[0044] The signal monitoring terminal can change the circuit state between the second pin 22 and the third pin 50 when the varistor fails, so that it can be used to monitor whether the varistor is working normally.

[0045] Normal state: When the varistor is operating normally, the second pin 22 is connected to the first pin 40, transmitting the voltage to the rest of the circuit. At this time, the third pin 50 does not participate in the voltage transmission of the circuit, but is used to monitor the state of the varistor.

[0046] Failure state: When the varistor fails due to overvoltage, surge voltage, or aging, the connection between the first pin 40 and the second pin 22 is broken, preventing current from flowing to the rest of the circuit and avoiding further damage. In this case, the circuit state between the second pin 22 and the third pin 50 changes, such as forming an open circuit or a low-impedance path, which can be used to indicate that the varistor has failed.

[0047] This monitoring mechanism can be implemented in the following ways:

[0048] Voltage monitoring: In normal working state, the voltage between the second pin 22 and the third pin 50 is zero or a certain value. When the varistor fails, this voltage value changes, and the state of the varistor can be detected by monitoring this voltage change.

[0049] Current monitoring: When the varistor fails, the current between the second pin 22 and the third pin 50 increases, as the current flows through the third pin 50 to the monitoring circuit, triggering an alarm or protection mechanism.

[0050] Resistance monitoring: By measuring the resistance between the second pin 22 and the third pin 50, it can be detected whether the varistor has failed.

[0051] This signal monitoring mechanism can be connected to an external protection circuit or control system, which automatically cuts off the power supply or triggers other protection measures when the varistor fails, to protect the safety of the circuit and equipment.

[0052] The ceramic box body 21 comprises a base 211 and a cover 212, a plurality of positioning columns 2111 are arranged on the inner side of the base 211, a plurality of positioning holes 2121 are arranged on the cover 212 corresponding to the plurality of positioning columns 2111, and the positioning columns 2111 are inserted into the positioning holes 2121. The through hole 2114 is arranged on the inner side of the base 211, and the accommodation groove 2115 is arranged on the lower surface of the base 211, the accommodation groove 2115 is communicated with the through hole 2114, and the lead wire 25 is located in the accommodation groove 2115.

[0053] The base 211 is provided with an embedded edge 2112 on the top for mating with the cover 212. The embedded edge 2112 is embedded in the inner side of the cover 212. The positioning posts 2111 and positioning holes 2121 cooperate with the embedded edge 2112 to securely connect the base 211 and cover 212. Notches 213 are provided on the embedded edge 2112 and the edge of the cover 212, respectively, for the limiting end 223 of the second pin 22 to extend out. The retaining end of the second pin 22 is retained in the notch 213. The inner side of the cover 212 corresponds to a limiting space 2122 for the second pin 22 when released, limiting the elastic swing of the elastic end 222 of the second pin 22 when it is separated from the solder foot 23. The lower surface of the base 211 is provided with an escape space 2113 , and the through hole 2114 and the accommodating groove 2115 are located in the escape space 2113 , so as to reduce the overall thickness and volume of the lightning protection device.

[0054] The insulating sleeve 30 is wrapped around the outside of the circuit protection device 10 and the tripping mechanism 20. Specifically, the insulating sleeve 30 is formed by coating the outside of the circuit protection device 10 and the ceramic box body 21 with a high-temperature resistant epoxy resin material to avoid insulation problems such as line contact and environmental changes, so that the outside of the device achieves high insulation performance and is suitable for various special environments.

[0055] It should be noted that the attached Figure 12 and 13 In the figure, P1 represents the first pin, P2 represents the second pin, and P3 represents the third pin.

[0056] The working principle of the lightning protection device is as follows: When the circuit protection device 10 encounters a high temperature caused by a lightning strike or when the varistor is abnormal (aging of the varistor, overvoltage or surge voltage), the varistor will continue to heat up. When the temperature reaches the low-temperature tin softening state; the low-temperature tin at the solder pin 23 melts, and the elastic end 222 of the second pin 22 will be disconnected from the solder pin 23 under the drive of its own elastic stress accumulation, thereby being able to disconnect the current in time to prevent the varistor from generating an open flame due to overheating. The first pin 40 and the second pin 22 disconnect the circuit, so that the device connected to the second pin 22 is cut off from the circuit to prevent further damage. If there is a third pin 50, the signal monitoring terminal is formed between the second pin 22 and the third pin 50 to provide timely feedback on the device status to the user.

[0057] The utility model discloses a design emphasis lies in, through the combination of tripping mechanism is combined on the circuit protection device and the whole coating insulation layer forms lightning protection device structure, utilize circuit protection device and heat because of overvoltage, overcurrent and make the soldering pin low temperature tin melt, the elastic end of second pin is driven under the self elasticity stress storage and separates circuit protection device, prevents overheating combustion, avoids simultaneously the electronic equipment of being connected by lightning damage, reaches the effect of preventing combustion, reaches also the grade of lightning protection device.

[0058] The lightning protection device structure has following advantages:

[0059] First, can adopt the plug-in type or the patch type (SMT) and the circuit board combines, and the whole volume is small, reduces a large amount of plug-in and patch work, reduces the board space.

[0060] Second, tripping mechanism adopts mechanical tripping, and the tripping effect is more safe and reliable.

[0061] Third, adopts high integration, and the selection type is simple and convenient, and the flexibility is strong.

[0062] Fourth, has two feet and three feet scheme, two feet can directly replace traditional scheme, and user does not need to change board;Three feet is the scheme with remote signal, can be linked with the equipment of user, once appears damage or failure, can through the communication function of user equipment, for user timely feedback product's state, realizes intelligent notice management effect.

[0063] The above, only is the preferred embodiment of the utility model, and does not limit the technical range of the utility model, so any slight modification, equivalent change and modification of the above embodiment according to the technical essence of the utility model still belong to the range of the utility model technical scheme.

Claims

1. A structure of an anti-burning and lightning protection device, characterized in that: It includes a circuit protection device, a tripping mechanism, an insulating sleeve and a first pin, and the insulating sleeve is wrapped around the outside of the circuit protection device and the tripping mechanism; the tripping mechanism includes a ceramic box body and a second pin installed in the ceramic box body, and the ceramic box body is tightly attached to the circuit protection device; a welding foot connected to the circuit protection device and capable of transferring heat from the circuit protection device is provided in the ceramic box body, and a winding column is provided in the ceramic box body corresponding to the second pin; the second pin includes a fixed part and an elastic end and a limiting end connected to both ends of the fixed part, the fixed part is sleeved on the winding column, the elastic end is soldered to the welding foot by low-temperature tin, and the limiting end is clamped on the ceramic box body and extends out of the insulating sleeve; the first pin also extends out of the insulating sleeve.

2. The anti-burning and lightning protection device structure according to claim 1 is characterized in that: A through hole is opened on the inside of the ceramic box body, and a wire connected to the circuit protection device is arranged in the ceramic box body; the front end of the wire extends upward from the through hole to form the welding foot, and the elastic end of the second pin is soldered to the welding foot by low-temperature tin.

3. The anti-burning and lightning protection device structure according to claim 2, characterized in that: The rear end of the wire extends outward from the insulating sleeve to form a third pin for signal detection; the third pin and the second pin form a signal monitoring terminal.

4. The anti-burning and lightning protection device structure according to claim 2, characterized in that: The ceramic box body includes a base and a cover body. A plurality of positioning columns are arranged on the inner side of the base. A plurality of positioning holes are arranged on the cover body corresponding to the plurality of positioning columns. The positioning columns are inserted into the positioning holes.

5. The anti-combustion and lightning protection device structure according to claim 4, characterized in that: The through hole is arranged on the inner side of the base, and a receiving groove is arranged on the lower surface of the base, and the receiving groove is communicated with the through hole; the wire is located in the receiving groove.

6. The anti-burning and lightning protection device structure according to claim 4, characterized in that: The upper portion of the base is provided with an embedded edge for cooperating with the cover body, and the embedded edge is embedded in the inner side of the cover body; and notches for the limiting end of the second pin to extend out are correspondingly provided on the embedded edge and the edge of the cover body, and the second pin is clamped in the notch.

7. The anti-burning and lightning protection device structure according to claim 1, characterized in that: The circuit protection device is one of a discharge tube, a varistor, a transient suppression diode, a resettable fuse and a thermistor, or a combination of two of them.

8. The anti-burning and lightning protection device structure according to claim 7, characterized in that: The circuit protection device is a combination of a discharge tube and a varistor.

9. The anti-burning and lightning protection device structure according to claim 4, characterized in that: The inner side of the cover corresponds to the limiting space of the second pin when it is released.

10. The anti-burning and lightning protection device structure according to claim 4, characterized in that: A recessed avoidance space is formed on the lower surface of the base, and the through hole and the accommodating groove are located in the recessed avoidance space.

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