Surge protection device

Abstract

The utility model discloses a surge protection device. The surge protection device comprises a shell, a mechanism assembly for generating a thermal tripping effect, an isolation cover shell, an element combination unit for bearing surge energy, a wiring port assembly and a fastener, the component combination unit capable of bearing surge energy is characterized in that the component combination unit capable of bearing surge energy is provided with a high-energy piezoresistor and a gas discharge tube, and an upper end lead-out pin on the high-energy piezoresistor is connected with a disengagement elastic sheet of a mechanism assembly generating a thermal tripping effect through soldering tin to form a low-temperature disengagement welding point; the separation welding point can be melted after being heated to reach the soldering tin melting point temperature, and the thermal tripping effect is generated under the elastic force acting force of the separation elastic sheet; the high-energy piezoresistor and the discharge tube are combined in series, and are connected with the mechanism assembly generating the thermal tripping effect and the wiring port assembly to form a complete electrical circuit, and the structure has the characteristics of compact structure, small product size, high flow rate and low residual voltage.

Description

Technical Field

[0001] The utility model discloses a surge protector, belonging to the technical field of overvoltage and lightning protection. Background Art

[0002] Surge protector is an electronic device that provides safety protection for various electronic equipment, 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 discharge the lightning current in a very short time, effectively disconnecting the circuit, thereby preventing the surge from damaging other equipment in the circuit and protecting electronic products from damage caused by overvoltage and lightning current.

[0003] There are two main types of surge protectors on the market for power supply protection against overvoltage and lightning strikes, namely: voltage-limiting surge protectors and voltage-switching surge protectors. The core component of a voltage-limiting surge protector is a varistor, which has the disadvantages of easy aging and leakage current; the core component of a voltage-switching surge protector is a discharge gap (the most common is a discharge tube), which has the disadvantage of the possibility of continuous current not being interrupted. Utility Model Content

[0004] In order to solve the above problems, the utility model discloses a combined surge protector, which, in normal use: utilizes the discharge tube open circuit function to solve the leakage current generated by the varistor and alleviate the aging of the varistor; on the other hand, due to the existence of the varistor, the problem of the discharge tube's possible continuous current not being interrupted can be solved; as the operating time increases, the leakage current will become larger and larger to solve the above problem.

[0005] To achieve the above-mentioned purpose, the utility model is a surge protection, comprising a shell, a mechanism component that produces a thermal tripping effect, an isolation cover, a component assembly unit that carries surge energy, a wiring port assembly and a fastener; characterized in that: the mechanism component that produces a thermal tripping effect is provided with a wiring frame, a detaching spring, a wiring screw, a connector and a wiring bracket; the component assembly unit that carries surge energy is provided with a high-energy varistor and a gas discharge tube, and the upper end lead pin on the high-energy varistor is connected to the welding port on the detaching spring of the mechanism component that produces the thermal tripping effect through soldering to form a low-temperature detachment welding point, and the detachment welding point will melt after the temperature reaches the melting point of the solder, and the function of generating a thermal tripping effect under the elastic force of the detachment spring itself; the high-energy varistor and the discharge tube are combined in series, and are connected with the mechanism component that produces the thermal tripping effect and the wiring port assembly to form a complete electrical circuit; the wiring port assembly is provided with a wiring frame, a wiring screw and a wiring bracket. Preferably, one surface of the high-energy resistor and one surface of the discharge tube are connected by direct soldering; the other end of the high-energy varistor forms an "upper lead pin", and the other end of the discharge tube is connected to the lower terminal 5.

[0006] Preferably, the side welding end surface on the high-energy varistor and the double pins on the gas discharge tube are soldered to form a series connection circuit between the varistor and the discharge tube; the single pin on the gas discharge tube is connected to the soldering station on the wiring port assembly to form an electrical connection of the surge protector.

[0007] Preferably, the shell is configured as an upper cover and a bottom shell, both of which are flame-retardant and high-temperature resistant thermoplastic materials. A visual window is provided on the top surface of the upper cover, through which the real-time status of the low-temperature detached welding point on the mechanism component that produces the thermal tripping effect can be visually determined, that is, whether the working status of the surge protector is in a normal state can be fed back; the upper cover has two guide holes on the front side, corresponding to the two screw holes on the end face of the bottom shell, and fasteners are inserted from the guide holes to the screw holes, so that the upper cover and the bottom shell form a mating lock-type assembly.

[0008] Preferably, the isolation cover is made of flame-retardant and high-temperature resistant thermoplastic material, which has the functions of blocking, fixing, limiting and insulating.

[0009] Preferably, the upper lead-out pin on the high-energy varistor passes through the port on the isolation cover to the outside of the isolation cover, and the limiting pillar 1 and the limiting pillar 2 on both sides of the high-energy varistor are respectively clamped on the guide block 1 and the guide block 2 of the isolation cover, thereby fixing the varistor in the inner cavity of the isolation cover.

[0010] Preferably, the detachment spring is a metal part with elastic function, and the upper lead-out pin on the high-energy varistor will be inserted into the square hole notch on its welding port and connected through solder to form a low-temperature detachment welding point. When the low-temperature detachment welding point is heated to the melting point of the solder, the detachment spring will use its own elastic force to separate the welding port on the detachment spring from the upper lead-out pin on the high-energy varistor, thereby producing a thermal tripping effect.

[0011] Preferably, the high-energy varistor in the component combination unit carrying surge energy is a single chip or a combination of multiple chips connected in parallel.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The high-energy varistor and the gas discharge tube are combined into a component combination unit capable of carrying surge energy through an electrical route connected in series, installed in an isolation cover with the functions of blocking, fixing, limiting and insulating, and directly connected to the mechanism components and wiring port components that produce the thermal tripping effect to form a complete electrical circuit;

[0014] The upper lead pin on the high-energy varistor and the welding port on the detachment spring of the mechanism component that produces the thermal tripping effect are connected through soldering to form a low-temperature detachment welding point. The detachment welding point will melt when the temperature reaches the melting point of the solder, and the thermal tripping effect will be generated under the elastic force of the detachment spring itself;

[0015] By connecting the high-energy varistor and the gas discharge tube in series, in addition to being able to directly carry the lightning current energy required by the product, its residual voltage value will be significantly lowered.

[0016] Therefore, the whole structure is compact, the product volume is small, and it has the characteristics of high flow rate and low residual pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is an exploded view of a surge protector.

[0018] Figure 2 This is an exploded view of the series combination of the high-energy varistor and the discharge tube in this embodiment.

[0019] Figure 3 It is an assembly diagram of the isolation cover and the component combination unit for carrying surge energy in this embodiment.

[0020] Figure 4 This is a schematic diagram of the structure of the surge protector of the utility model in normal working state.

[0021] Figure 5 The utility model is a schematic diagram of the structure of the surge protector in failure state.

[0022] In the figure: 1. shell; 11. upper cover; 111. visual window; 112. guide hole; 12. bottom shell; 121. screw hole; 2. mechanism assembly; 21. wiring frame; 22. detachable spring; 221. welding port; 23. wiring screw; 24. connector; 25. wiring bracket 2; 3. isolation cover; 31. port; 32. guide block 1; 33. guide block 2; 4. component assembly unit; 41. high-energy varistor; 411. upper end lead pin; 412. side welding end face; 413. limit support 1; 414. limit support 2; 42. gas discharge tube; 421. double pin; 422. single pin; 5. wiring port assembly; 51. wiring bracket 1; 52. soldering station; 6. welding point; 7. fastener. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-5 The utility model provides a surge protector, comprising a housing 1, a mechanism component (2) for generating a thermal tripping effect, an isolation cover 3, a component assembly unit 4 for carrying surge energy, a wiring port assembly 5 and a fastener 7, wherein the mechanism component (2) for generating a thermal tripping effect is provided with a wiring frame 21, a detaching spring 22, a wiring screw 23, a connecting piece 24 and a wiring bracket 25; the component assembly unit 4 for carrying surge energy is provided with a high-energy varistor 41 and a gas discharge tube 42, an upper end lead pin 411 on the high-energy varistor 41 and a welding port 221 on the detaching spring 22 of the mechanism component (2) for generating a thermal tripping effect are connected by solder to form a low-temperature detaching welding point 6, wherein the detaching welding point 6 will melt after being heated to a temperature reaching the melting point of the solder, and the function of generating a thermal tripping effect is generated under the elastic force of the detaching spring 22 itself; The high-energy varistor 41 and the discharge tube 42 are connected in series and connected with the mechanism component (2) generating the thermal tripping effect and the wiring port component 5 to form a complete electrical circuit; the wiring port component 5 is provided with a wiring frame 21, a wiring screw 23 and a wiring bracket 51; the high-energy varistor 41 and the gas discharge tube 42 are connected in series, and in addition to being able to directly carry the lightning current energy required by the product, the residual voltage value thereof will be significantly reduced, so that the whole structure has the characteristics of compact structure, small product volume, high flow rate and low residual voltage.

[0025] The side welding end face 412 on the high-energy varistor 41 and the double pins 421 on the gas discharge tube 42) are soldered to form a series connection circuit between the varistor and the discharge tube, and the single pin 422 on the gas discharge tube 42) is connected to the soldering station 52 on the wiring port component 5 to form an electrical connection of the surge protector. The shell 1 is configured as an upper cover 11 and a bottom shell 12, both of which are flame-retardant and high-temperature resistant thermoplastic materials. A visual window 111 is provided on the top surface of the upper cover 11, through which the real-time state of the low-temperature detached welding point 6 on the mechanism component (2) that produces the thermal tripping effect can be visually determined, that is, whether the working state of the surge protector is in a normal state can be fed back; the upper cover 11 has two guide holes 112 on the front side, corresponding to the two screw holes 121 on the end surface of the bottom shell 12, and the fastener 7 is inserted from the guide hole 112 to the screw hole 121, so that the upper cover 11 and the bottom shell 12 form a matching lock-type assembly.

[0026] The isolation shell 3 is set to be a flame-retardant and high-temperature resistant thermoplastic material, which has the functions of blocking, fixing, limiting and insulating. The upper end lead pin 411 on the high-energy varistor 41 passes through the port 31 on the isolation shell 3 to the outside of the isolation shell 3, and the limiting pillar 1 413 and the limiting pillar 2 414 on both sides of the high-energy varistor 41 are respectively clamped on the guide block 1 (32) and the guide block 2 33 of the isolation shell 3, thereby fixing the varistor 41 in the inner cavity of the isolation shell 3; the high-energy varistor 41 and the gas discharge tube 42 are combined into a component combination unit capable of carrying surge energy through an electrical route connected in series, and are installed in the isolation shell 3 with the functions of blocking, fixing, limiting and insulating, and are directly connected to the mechanism component 2 and the wiring port component 5 that produce the thermal tripping effect to form a complete electrical circuit.

[0027] The detachment spring 22 is a metal part with elastic function, and the upper lead pin 411 on the high-energy varistor 41 will be inserted into the square hole notch on its welding port 221 and connected by soldering to form a low-temperature detachment welding point 6. When the low-temperature detachment welding point 6 is heated to the melting point of the solder, the detachment spring 22 will use its own elastic force to separate the welding port 221 on the detachment spring 22 from the upper lead pin 411 on the high-energy varistor 41, thereby generating a thermal tripping effect. The high-energy resistor 41 in the component combination unit 4 carrying surge energy can be a single piece or a combination of multiple pieces in parallel. The upper lead pin 411 on the high-energy varistor 41 and the welding port 221 on the detachment spring 22 of the mechanism component 2 that generates the thermal tripping effect are connected by soldering to form a low-temperature detachment welding point 6. The detachment welding point 6 will melt after being heated to the melting point of the solder, and the thermal tripping effect will be generated under the elastic force of the detachment spring 22.

[0028] During specific use, the high-energy varistor 41 and the gas discharge tube 42 are combined into a component combination unit capable of carrying surge energy through an electrical route connected in series, and are installed in an isolation cover 3 with the functions of blocking, fixing, limiting and insulating, and are directly connected to the mechanism component 2 and the wiring port component 5 that produce the thermal tripping effect to form a complete electrical circuit; the upper end lead pin 411 on the high-energy varistor 41 is connected to the welding port 221 on the detachment spring 22 of the mechanism component 2 that produces the thermal tripping effect through soldering to form a low-temperature detachment welding point 6, and the detachment welding point 6 will melt after the temperature reaches the melting point of the solder, and the function of generating the thermal tripping effect under the elastic force of the detachment spring 22 itself; the high-energy varistor 41 and the gas discharge tube 42 are connected in series, in addition to being able to directly carry the lightning current energy required by the product, its residual voltage value will be significantly reduced, so the entire structure has the characteristics of compact structure, small product volume, high flow rate and low residual pressure.

[0029] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

Claims

1. A surge protector, comprising a housing (1), a mechanism component (2) for generating a thermal tripping effect, an isolation cover (3), a component assembly unit (4) for carrying surge energy, a wiring port component (5) and a fastener (7), characterized in that: The mechanism component (2) generating the thermal tripping effect is provided with a wiring frame (21), a detaching spring (22), a wiring screw (23), a connecting piece (24) and a second wiring bracket (25); the component assembly unit (4) carrying surge energy is provided with a high-energy varistor (41) and a gas discharge tube (42); the upper end lead pin (411) on the high-energy varistor (41) and the welding port (221) on the detaching spring (22) of the mechanism component (2) generating the thermal tripping effect are connected by soldering to form a low-temperature detaching welding point (6); the detaching welding point (6) will melt after being heated to a melting point of the solder, and the function of generating the thermal tripping effect is generated under the elastic force of the detaching spring (22); The high-energy varistor (41) and the discharge tube (42) are connected in series and connected to a mechanism component (2) that generates a thermal tripping effect and a wiring port component (5) to form a complete electrical circuit; the wiring port component (5) is provided with a wiring frame (21), wiring screws (23) and a wiring bracket (51).

2. The surge protector according to claim 1, characterized in that: The side welding end surface (412) on the high-energy varistor (41) and the double pins (421) on the gas discharge tube (42) are soldered to form a series connection circuit between the varistor and the discharge tube, and the single pin (422) on the gas discharge tube (42) is connected to the soldering station (52) on the wiring port assembly (5) to form an electrical connection of the surge protector.

3. The surge protector according to claim 1, characterized in that: The housing (1) is configured as an upper cover (11) and a bottom shell (12), both of which are made of flame-retardant and high-temperature resistant thermoplastic materials. A visual window (111) is provided on the top surface of the upper cover (11), through which the real-time state of the low-temperature detached welding point (6) on the mechanism component (2) that produces the thermal tripping effect can be visually determined, that is, whether the working state of the surge protector is in a normal state can be fed back; the upper cover (11) has two guide holes (112) on the front surface, corresponding to the two screw holes (121) on the end surface of the bottom shell (12), and fasteners (7) are inserted from the guide holes (112) to the screw holes (121), so that the upper cover (11) and the bottom shell (12) form a matching lock-type assembly.

4. The surge protector according to claim 1, characterized in that: The isolation cover (3) is made of flame-retardant and high-temperature resistant thermoplastic material and has the functions of blocking, fixing, limiting and insulating.

5. The surge protector according to claim 1, characterized in that: The upper lead pin (411) on the high-energy varistor (41) passes through the port (31) on the isolation cover (3) to the outside of the isolation cover (3), and the limiting pillar 1 (413) and the limiting pillar 2 (414) on both sides of the high-energy varistor (41) are respectively clamped on the guide block 1 (32) and the guide block 2 (33) of the isolation cover (3), thereby fixing the varistor (41) in the inner cavity of the isolation cover (3).

6. The surge protector according to claim 1, characterized in that: The detachment spring (22) is a metal part with elastic function, and the upper lead pin (411) on the high-energy varistor (41) is inserted into the square hole slot on its welding port (221) and connected by solder to form a low-temperature detachment welding point (6). When the low-temperature detachment welding point (6) reaches the melting point of the solder, the detachment spring (22) will use its own elastic force to separate the welding port (221) on the detachment spring (22) from the upper lead pin (411) on the high-energy varistor (41), thereby generating a thermal tripping effect.

7. The surge protector according to claim 1, characterized in that: The high-energy varistor (41) in the component combination unit (4) carrying surge energy is a single chip or a combination of multiple chips connected in parallel.

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