Multi-layer graphite gap type surge protection device
By incorporating a combination of thermally conductive silicone layer and thermally conductive graphite strip in the surge protector, the problem of heat accumulation during breakdown discharge in multilayer graphite gap surge protectors is solved, achieving efficient heat dissipation and safety alerts, extending device lifespan and improving stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-17
- Publication Date
- 2026-03-27
AI Technical Summary
Multilayer graphite gap surge protectors are prone to heat buildup during breakdown discharge, which can lead to heat accumulation and affect device lifespan and stability.
Thermally conductive silicone layers are installed on the inner side of the surge protector's housing and the inner side of the cover plate, and thermally conductive graphite strips are embedded on them to form a multi-dimensional heat conduction path. Meanwhile, heat dissipation holes and filters are installed on the outer side of the housing, and temperature monitoring and prompts are provided in conjunction with temperature control lights.
It effectively improves the heat conduction and heat dissipation efficiency of surge protectors, avoids oxidation or carbonization caused by excessive local temperature, extends device life and improves safety in use.
Smart Images
Figure CN224053894U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of surge protector especially to a multilayer graphite gap type surge protector. BACKGROUND
[0002] In the field of overvoltage protection of power systems and electronic equipment, as a core protection component, surge protectors bear the important function of safely discharging transient overvoltage caused by lightning strikes, switch operations or power failures to the ground. Traditional surge protectors mostly use metal oxide varistors, gas discharge tubes or gap discharge structures, but such devices have problems such as slow response speed, high residual voltage, easy aging or short service life. Therefore, a multilayer graphite gap type surge protector is used in the prior art, which significantly improves the surge discharge capacity through the composite structure design of multilayer graphite sheets and gaps. Compared with traditional technology, the multilayer graphite gap structure has the advantages of fast response speed, low residual voltage, large current capacity and resistance to multiple impacts, and is especially suitable for protection needs in high-frequency electronic equipment and complex electromagnetic environments.
[0003] However, since graphite material generates instantaneous high temperature during breakdown discharge, and the structure of multiple layers tightly stacked makes it difficult for heat to quickly dissipate, which easily leads to excessive local temperature. When running for a long time under high load, heat accumulation may cause high temperature to accelerate the oxidation or carbonization of graphite and insulation layer, resulting in changes in gap distance, affecting the stability of breakdown voltage, and thus shortening the service life of the device, and even causing short-circuit failure.
[0004] Therefore, there is an urgent need for a multilayer graphite gap type surge protector that has both high-efficiency surge discharge capacity and reliable heat dissipation performance to meet the needs of use. UTILITY MODEL CONTENT
[0005] Based on the need for efficient heat dissipation of the multilayer graphite gap type surge protector in the prior art, the utility model provides a multilayer graphite gap type surge protector.
[0006] The application discloses a multilayer graphite gap type surge protector which comprises a graphite gap module, a shell for containing the graphite gap module and being open at one end and a cover plate for sealing the opening of the shell; a first heat-conducting silica gel layer is arranged on the inner side of the shell, a plurality of strip-shaped grooves are arranged on the first heat-conducting silica gel layer and a heat-conducting graphite strip is embedded in each of the strip-shaped grooves; a second heat-conducting silica gel layer is arranged on the inner side of the cover plate; the graphite gap module is arranged above the first heat-conducting silica gel layer and comprises a base and a top, and a graphite gap assembly is clamped and fixed between the base and the top; an electrode is arranged on each side of the base, the pins of the electrodes extend out of the shell and the inner end portions of the electrodes are in surface contact with the graphite gap assembly; the graphite gap assembly comprises a plurality of graphite sheets arranged side by side and an insulating sheet is arranged between adjacent graphite sheets; a first circuit board electrically connected with the graphite gap assembly is arranged above the top, a plurality of metal spring needles which are elastically contacted with the graphite sheets are welded on the upper and lower surfaces of the first circuit board, a plurality of capacitors which are correspondingly connected with the metal spring needles are electrically connected with the first circuit board; a temperature control lamp and a power supply module electrically connected with the temperature control lamp are further arranged on one side of the shell; the temperature control lamp is used for prompting when the temperature inside the shell is too high.
[0007] Further, the first heat-conducting silica gel layer and the second heat-conducting silica gel layer are fixed on the inner sides of the shell and the cover plate respectively by heat-conducting glue.
[0008] Further, a plurality of strip-shaped grooves for facilitating plugging and unplugging of the shell are arranged on the outer sides of the shell.
[0009] Further, a plurality of first heat dissipation holes are arranged on the outer sides of the shell and a filter screen is arranged in each of the first heat dissipation holes.
[0010] Further, a plurality of heat-conducting holes are arranged on the first heat-conducting silica gel layer and the second heat-conducting silica gel layer, a plurality of second heat dissipation holes which are communicated with the corresponding heat-conducting holes are arranged on the shell and the cover plate.
[0011] Further, the temperature control lamp comprises a lampshade embedded on the shell, a second circuit board arranged in the shell and a lamp bead plate, the lamp bead plate is electrically connected with the second circuit board and faces the lampshade, a temperature detection module for detecting the temperature inside the shell is arranged on the second circuit board and the second circuit board is used for controlling the light and off of the lamp bead plate based on the detection data of the temperature detection module.
[0012] Further, the power supply module comprises a battery compartment, the battery compartment is electrically connected with the second circuit board and a plurality of button cells are arranged in the battery compartment.
[0013] Further, the shell inner side is provided with a plurality of limiting blocks, when the graphite gap module is installed in the shell, the limiting blocks abut against the graphite gap module.
[0014] Further, the electrode two ends are respectively attached to the base and the top base, and are fixedly connected with the base and the top base through screws.
[0015] The utility model discloses a multilayer graphite gap type surge protector, through setting up the first heat conduction silica gel layer in the shell inner side, and setting up the strip groove and embedding the heat conduction graphite strip on it, setting up the second heat conduction silica gel layer in the inner side of cover plate simultaneously, and then effectively improve the heat conduction efficiency and the heat dissipation efficiency of the surge protector, make the surge protector can quickly conduct the instantaneous high temperature that graphite gap module produces when breakdown discharges to the shell and the cover plate and promptly dissipate, avoid the partial temperature excessively high and accelerate the oxidation or carbonization speed of graphite sheet and insulating sheet, be favorable to prolong the service life of surge protector. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 The utility model provides a kind of overall structure schematic diagram of multilayer graphite gap type surge protector provided by the utility model;
[0017] Figure 2 The utility model provides a kind of side structure schematic diagram of multilayer graphite gap type surge protector provided by the utility model;
[0018] Figure 3 The utility model provides a kind of internal structure schematic diagram of multilayer graphite gap type surge protector provided by the utility model;
[0019] Figure 4 The utility model provides a kind of structure schematic diagram of shell and first heat conduction silica gel, heat conduction graphite strip; Figure 3 The utility model provides a kind of structure schematic diagram of cover plate and second heat conduction silica gel;
[0020] Figure 5 The utility model provides a kind of structure schematic diagram of shell and first heat conduction silica gel, heat conduction graphite strip;
[0021] Figure 6 The utility model provides a kind of structure schematic diagram of cover plate and second heat conduction silica gel;
[0022] DRAWINGS
[0023] 1, shell; 2, cover plate; 3, first heat-conducting silica gel; 4, heat-conducting graphite strip; 5, second heat-conducting silica gel layer; 6, first heat dissipation hole; 7, base; 8, top seat; 9, graphite gap assembly; 901, graphite sheet; 902, insulating sheet; 10, electrode 101, pin; 11, first circuit board; 12, metal spring needle; 13, capacitor; 14, temperature control lamp; 141, lampshade; 142, second circuit board; 143, lamp bead plate; 144, temperature detection module; 15, battery compartment; 16, button cell; 17, strip-shaped groove; 18, limiting block. DETAILED DESCRIPTION
[0024] To further introduce the utility model, next, combining with the drawing is described. It is particularly pointed out that the examples described below are only a part of the embodiments of the utility model, and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor are within the scope of the utility model protection.
[0025] Reference Figure 1 And Figure 3 As shown in a multilayer graphite gap type surge protector, including a graphite gap module (not marked in the figure), a housing containing the graphite gap module and one end opening and a cover plate 2 encapsulating the opening of the shell 1. In this embodiment, the shell 1 and cover plate 2 are made of high-density polyethylene material.
[0026] Specifically, referring to Figure 3 、 Figure 5 And Figure 6 As shown, the inner side of the shell 1 is provided with a first heat-conducting silica gel layer 3, and a plurality of strip-shaped grooves (not shown in the figure) are provided on the first heat-conducting silica gel layer 3, and a heat-conducting graphite strip 4 is embedded in the strip-shaped groove; the inner side of the cover plate 2 is provided with a second heat-conducting silica gel layer 5. Among them, the first heat-conducting silica gel layer 3, the second heat-conducting silica gel layer 5 are fixed on the inner side of the shell 1, the cover plate 2 respectively through the heat-conducting glue (not shown in the figure).
[0027] The first heat-conducting silica gel layer 3 inside the shell 1 is embedded with high-heat-conducting graphite strips 4 through the strip-shaped slot to form a multi-dimensional heat conduction path. The good heat conductivity and flexibility of the heat-conducting silica gel and the excellent heat conductivity of the graphite synergistically work to quickly conduct the transient heat generated by the surge to the surface of the shell from the graphite gap module; at the same time, the second heat-conducting silica gel layer 5 on the inner side of the cover plate 2 further expands the heat dissipation area, thereby effectively improving the heat conduction efficiency and heat dissipation efficiency of the surge protector, so that the surge protector can quickly conduct the transient high temperature generated by the graphite gap module during breakdown discharge to the shell 1 and the cover plate 2 and dissipate it in time, avoiding the accelerated oxidation or carbonization speed of the graphite sheet and the insulating sheet due to the local high temperature, improving the stability of the surge protector under high energy impact, and prolonging the service life of the surge protector.
[0028] Preferably, the first heat-conducting silica gel layer 3 and the second heat-conducting silica gel layer 5 are each provided with a plurality of heat-conducting holes (not shown in the figure), and the shell 1 and the cover plate 2 are each provided with a plurality of second heat dissipation holes (not shown in the figure) in communication with the corresponding heat-conducting holes.
[0029] The heat-conducting holes of the heat-conducting silica gel layer are vertically aligned with the second heat dissipation holes of the shell 1 and the cover plate 2 to form a straight-through heat dissipation channel for the internal heat of the surge protector to be dissipated in turn in the "heat-conducting silica gel layer, shell / cover plate, external environment", significantly shortening the heat conduction path, reducing the thermal resistance, and further improving the heat dissipation efficiency. In addition, the heat-conducting holes and the second heat dissipation holes can guide the gas and graphite powder generated by discharge out of the device to prevent internal short circuit.
[0030] Reference Figure 2 As shown, the shell 1 is provided with a plurality of first heat dissipation holes 6 on both sides, and each of the first heat dissipation holes 6 is provided with a filter screen (not shown in the figure).
[0031] The first heat dissipation holes 6 on both sides of the shell 1 form a through-type ventilation channel to accelerate the discharge of internal hot air, complementing the active heat conduction of the heat-conducting silica gel layer and the graphite strips to form a good heat dissipation mechanism, further avoiding the accumulation of local hot spots and improving the stability of the device under high energy impact or continuous operation. The filter screen built-in the heat dissipation holes can block dust, metal particles and corrosive liquids from entering the shell, protecting the sensitive graphite gap module and heat-conducting layer from pollution or short circuit risk.
[0032] Reference Figure 3As shown, the graphite gap module is located above the first heat-conductive silica gel layer 3, and the graphite gap module comprises a base 7 and a top 8, and a graphite gap assembly 9 is clamped and fixed between the base 7 and the top 8; each side of the base 7 is provided with an electrode 10, the pin 101 of the electrode 10 extends out of the shell 1, and the inner side end of the electrode 10 is in surface contact with the graphite gap assembly 9. In this embodiment, the side surfaces of the two ends of the electrode 10 are respectively attached to the base 7 and the top 8, and are fixedly connected with the base 7 and the top 8 respectively by screws.
[0033] The graphite gap assembly 9 comprises a plurality of graphite sheets 901 arranged side by side, and an insulating sheet 902 is arranged between adjacent graphite sheets; a first circuit board 11 electrically connected with the graphite gap assembly 9 is arranged above the top 8, and a plurality of metal spring needles 12 elastically contacting the graphite sheets 901 are welded on the upper and lower surfaces of the first circuit board 11, and a plurality of capacitors 13 corresponding to the metal spring needles 12 are electrically connected on the first circuit board 11.
[0034] The metal spring needles 12 on the lower surface of the first circuit board are in contact with the graphite sheets 901 in the graphite gap assembly 9 to form a wiring line, the electrodes 10 on both sides of the graphite gap assembly 9 are connected with a power supply, the metal spring needles 12 are connected with the capacitors 13, and two groups of left-right symmetrical surge protection circuits are formed in the surge protector, the surge passes from one electrode 10 on one side of the graphite gap assembly 9 to the other electrode 10, passes through the graphite sheets 901 and the insulating sheets 902, and is transmitted to the corresponding capacitors 13 through the metal spring needles 12, thereby forming surge protection.
[0035] Reference Figure 3 , Figure 4 As shown, the shell 1 is further provided with a temperature control lamp 14 and a power supply module (not shown in the figure) electrically connected with the temperature control lamp 14; the temperature control lamp 14 is used for prompting when the temperature inside the shell 1 is too high.
[0036] The temperature control lamp 14 comprises a lampshade 141 embedded on the shell 1, a second circuit board 142 arranged in the shell 1, and a lamp bead plate 143 electrically connected with the second circuit board 142 and facing the lampshade 141; the second circuit board 142 is provided with a temperature detection module 144 for detecting the temperature inside the shell 1; the second circuit board 142 is used for controlling the on-off of the lamp bead plate 143 based on the detection data of the temperature detection module 144. In the embodiment, the temperature detection module 144 is a temperature sensor. When the temperature sensor detects that the temperature inside the shell 1 exceeds a preset threshold, the second circuit board 142 controls the lamp bead plate 143 to work and emit light to warn externally. The preset threshold is the maximum temperature for normal working of the surge protector; when the temperature is lower than the preset threshold, the lamp bead plate 143 does not emit light.
[0037] When the temperature of the shell 1 is too high, the temperature control lamp 14 is turned on to prompt, which helps the user to find and handle the over-temperature condition in time, and improves the use safety of the surge protector.
[0038] The power supply module comprises a battery compartment 15 electrically connected with the second circuit board 142, and a plurality of button cells 16 arranged in the battery compartment 15, which are used for supplying power for the temperature control lamp 14.
[0039] Reference Figure 2 As shown, a plurality of strip-shaped grooves 17 are arranged on the two sides of the shell 1, which are convenient for plugging and unplugging the shell 1. In the embodiment, the strip-shaped grooves 17 are located above the first heat dissipation holes 6.
[0040] A plurality of limiting blocks 18 are arranged on the inner side of the shell 1, and when the graphite gap module is arranged in the shell 1, the limiting blocks 18 abut against the graphite gap module, so that the graphite gap module is limited and fixed in the shell 1, and the shaking and displacement of the graphite gap module are avoided to affect the normal use.
[0041] The preferred embodiments of the utility model disclosed above are only used for helping to describe the utility model, and do not limit the utility model to only the specific embodiments described. Obviously, according to the content of the specification, other modifications and changes can be made. The embodiments selected and described in the specification are for better explaining the principle and practical application of the utility model, so that the persons skilled in the art can well understand and utilize the utility model, and are not limitations of the utility model, and any scheme simply transformed from the utility model belongs to the protection range of the utility model.
Claims
1. A multi-layered graphite gap type surge protector, characterized by, The graphite gap module, the shell containing the graphite gap module and being open at one end, and the cover plate sealing the opening of the shell are provided. The first heat-conducting silica gel layer is provided on the inner side of the shell, and a plurality of strip-shaped grooves are provided on the first heat-conducting silica gel layer, and a heat-conducting graphite strip is embedded in each of the strip-shaped grooves. The graphite gap module is located above the first heat-conducting silica gel layer, and the graphite gap module comprises a base and a top, and a graphite gap assembly is clamped and fixed between the base and the top. The graphite gap module is located above the first heat-conducting silica gel layer, and the graphite gap module comprises a base and a top, and a graphite gap assembly is clamped and fixed between the base and the top.
2. The multi-layered spark gap surge protector of claim 1, wherein, The graphite gap module is located above the first heat-conducting silica gel layer, and the graphite gap module comprises a base and a top, and a graphite gap assembly is clamped and fixed between the base and the top.
3. The multi-layered spark gap surge protector of claim 1, wherein, The first heat-conducting silica gel layer and the second heat-conducting silica gel layer are fixed on the inner sides of the shell and the cover plate, respectively, by heat-conducting glue.
4. The multi-layered spark gap surge protector of claim 1, wherein, The shell is provided with a plurality of strip-shaped grooves on the outer sides of the shell.
5. The multi-layered spark gap surge protector of claim 1, wherein, The shell is provided with a plurality of first heat dissipation holes on the outer sides of the shell, and a filter screen is arranged in each of the first heat dissipation holes.
6. The multi-layered spark gap surge protector of claim 1, wherein, The first heat-conducting silica gel layer and the second heat-conducting silica gel layer are provided with a plurality of heat-conducting holes, and the shell and the cover plate are provided with a plurality of second heat dissipation holes in communication with the corresponding heat-conducting holes.
7. A multi-layered spark gap surge protector according to claim 6, wherein, The temperature control lamp comprises a lampshade embedded in the shell, a second circuit board arranged in the shell, and a lamp bead plate.
8. The multi-layered spark gap surge protector of claim 1, wherein, The power supply module comprises a battery compartment, and the battery compartment is electrically connected with the second circuit board.
9. The multi-layered spark gap surge protector of claim 1, wherein, The inner side surfaces of the shell are provided with a plurality of limiting blocks, and the limiting blocks abut against the graphite gap module when the graphite gap module is installed in the shell. The electrodes are fixedly connected with the base and the top by screws, respectively.