Series composite lightning protection assembly

Abstract

The utility model discloses a series composite lightning protection assembly, which comprises a ceramic shell, a piezoresistor, a TSS discharge tube, an upper guide connecting piece, a lower guide connecting piece and a middle guide connecting piece, and the ceramic shell is internally provided with an accommodating space; the piezoresistor and the TSS discharge tube are overlapped and positioned in the accommodating space, one end of the upper guide connecting sheet is in contact with one pin of the piezoresistor, and the other end of the upper guide connecting sheet extends out of the ceramic shell; one end of the lower guide connecting sheet is in contact with one end of the TSS discharge tube, and the other end of the lower guide connecting sheet extends out of the ceramic shell; and the middle guide connecting sheet is connected between the other end of the TSS discharge tube and the other pin of the piezoresistor. The piezoresistor and the TSS discharge tube are connected in series and packaged in the ceramic shell to form the lightning protection assembly, so that higher safety voltage protection can be provided compared with the single use of the piezoresistor; and rapid and safe connection and disconnection can be ensured during voltage surge, so that the safe voltage level of the whole lightning protection system is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the lightning protection device field technology especially is series composite lightning protection assembly. BACKGROUND

[0002] In the field of power system and electronic equipment protection, the role of lightning protection device is crucial, they can release lightning or operating overvoltage energy, protect electrical equipment from the harm of instantaneous overvoltage. However, the existing lightning protection device technology, especially single voltage-dependent resistor or discharge tube as lightning protection device, has some obvious drawbacks, such as low safety voltage level, poor nonlinear characteristics, slow response speed, easy aging and safety hazards.

[0003] Specifically, single voltage-dependent resistor has high voltage limit at high current, large leakage current at low voltage, easy aging, and risk of short circuit failure causing fire. Single discharge tube has slow response speed and freewheeling problem, which causes the circuit to remain in conduction state after the overvoltage event ends, increasing the risk of circuit damage.

[0004] In view of these limitations, the present patent aims to propose a new lightning protection device solution to overcome the shortcomings of the prior art and provide more reliable and efficient lightning protection, overcurrent and overvoltage protection. SUMMARY

[0005] Therefore, the utility model provides a series composite lightning protection assembly, which can effectively reduce the residual voltage and respond to voltage surge quickly compared to using voltage-dependent resistor alone, providing higher level of safety voltage protection.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0007] A series composite lightning protection assembly includes a ceramic shell, a voltage-dependent resistor, a TSS discharge tube, an upper lead, a lower lead, and an intermediate lead. The ceramic shell has a receiving space. The voltage-dependent resistor and the TSS discharge tube are stacked in the receiving space. One end of the upper lead contacts one pin of the voltage-dependent resistor, and the other end of the upper lead extends outside the ceramic shell. One end of the lower lead contacts one end of the TSS discharge tube, and the other end of the lower lead extends outside the ceramic shell. The intermediate lead is connected between the other end of the TSS discharge tube and the other pin of the voltage-dependent resistor.

[0008] As a preferred solution, the receiving space of the ceramic shell has a filler, and the voltage-dependent resistor, TSS discharge tube, upper lead, lower lead, and intermediate lead are encapsulated in the receiving space by the filler.

[0009] As a preferred solution: the upper guide tab extends from one end of the ceramic shell and the lower guide tab extends from one end of the ceramic shell, and are respectively hooked on the side wall of the ceramic shell.

[0010] As a preferred solution: the upper guide tab extends from one end of the ceramic shell and the lower guide tab extends from one end of the ceramic shell, and are respectively hooked on the side wall of the ceramic shell.

[0011] As a preferred solution: the upper guide tab includes an upper contact portion and an upper hook portion connected integrally, the upper contact portion is in contact with one pin of the pressure sensitive resistor, and the upper hook portion is hooked on one side edge of the ceramic shell; the lower guide tab includes a disc-shaped lower contact portion, an extension portion and a lower hook portion connected integrally, the lower contact portion is close to the lower end of the TSS discharge tube, the extension portion is attached to the inner wall of the ceramic shell, and the lower hook portion is hooked on the other side edge of the ceramic shell.

[0012] As a preferred solution: the intermediate guide tab includes a first contact portion, a second contact portion, and a connecting portion integrally connected between the first contact portion and the second contact portion, the first contact portion is disc-shaped and in contact with the upper end of the TSS discharge tube, the second contact portion is in contact with the other pin of the pressure sensitive resistor, and the connecting portion is closely attached to the outer wall of the pressure sensitive resistor.

[0013] As a preferred solution: a U-shaped fitting groove is formed between the first contact portion, the second contact portion and the connecting portion of the intermediate guide tab, the width of the U-shaped fitting groove matches the thickness of the pressure sensitive resistor, and the side of the pressure sensitive resistor in contact with the second contact portion is closely embedded in the U-shaped fitting groove.

[0014] As a preferred solution: the filler is silicone rubber or epoxy resin.

[0015] As a preferred solution: the pressure sensitive resistor is located above the TSS discharge tube, and the upper surface of the pressure sensitive resistor is lower than the opening of the accommodating space.

[0016] As a preferred solution: the upper hook portion and the lower hook portion respectively form hooking grooves, and the width of the hooking grooves matches the thickness of the side wall of the ceramic shell.

[0017] The utility model discloses a lightning protection assembly, which is characterized by the following technical scheme: a pressure-sensitive resistor and a TSS discharge tube are connected in series and encapsulated in a ceramic shell to form a lightning protection assembly.

[0018] To make the structural features and effects of the utility model clearer, the utility model will be described in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 Fig. 1 is a perspective view of the lightning protection assembly of the utility model;

[0020] Figure 2 Fig. 2 is another perspective view of the lightning protection assembly of the utility model;

[0021] Figure 3 Fig. 3 is a schematic view of the internal structure of the lightning protection assembly of the utility model;

[0022] Figure 4 Fig. 4 is a schematic view of the transverse section of the lightning protection assembly of the utility model;

[0023] Figure 5 Fig. 5 is an exploded perspective view of the lightning protection assembly of the utility model.

[0024] BRIEF DESCRIPTION OF DRAWINGS

[0025] 10, ceramic shell; 11, accommodating space; 12, filler; 20, pressure-sensitive resistor; 21, pin; 30, TSS discharge tube; 40, upper lead tab; 41, upper contact part; 42, upper hook part; 50, lower lead tab; 51, lower contact part; 52, extension part; 53, lower hook part; 60, middle lead tab; 61, first contact part; 62, second contact part; 63, connecting part; 64, U-shaped matching groove. DETAILED DESCRIPTION

[0026] The utility model discloses Figures 1 to 5 As shown in a kind of series composite lightning protection assembly, including ceramic shell 10, voltage-dependent resistor 20, TSS discharge tube 30, upper lead tab 40, lower lead tab 50 and intermediate lead tab 60, wherein:

[0027] The ceramic shell 10 has a receiving space 11; The ceramic shell 10 has high airtightness, good moisture resistance and mechanical strength, and low thermal expansion coefficient and high thermal conductivity, which can keep stable in various harsh environments. The electrical insulation performance of ceramic material is excellent, and the chemical stability is high, which is not easy to react with internal circuit, to ensure the long-term reliability of packaging and the safety of circuit. The low dielectric constant of ceramic shell 10 makes it suitable for high frequency application, and can withstand high temperature, suitable for product packaging field requiring high sealing and high temperature resistance.

[0028] The voltage-dependent resistor 20 and TSS discharge tube 30 are stacked in the receiving space 11 (the voltage-dependent resistor 20 is located above the TSS discharge tube 30, and the upper surface of the voltage-dependent resistor 20 is lower than the opening of the receiving space 11), one end of the upper lead tab 40 is in contact with one pin 21 of the voltage-dependent resistor 20, and the other end of the upper lead tab 40 extends outside the ceramic shell 10; One end of the lower lead tab 50 is in contact with one end of the TSS discharge tube 30, and the other end of the lower lead tab 50 extends outside the ceramic shell 10; The intermediate lead tab 60 is connected between the other end of the TSS discharge tube 30 and the other pin 21 of the voltage-dependent resistor 20, to realize the series connection of the voltage-dependent resistor 20 and the TSS discharge tube 30.

[0029] The receiving space 11 of the ceramic shell 10 has a filler 12, and the voltage-dependent resistor 20, TSS discharge tube 30, upper lead tab 40, lower lead tab 50 and intermediate lead tab 60 are packaged in the receiving space 11 by the filler 12; The filler 12 is silicone rubber or epoxy resin. Through the packaging of the filler 12, the lightning protection assembly is completely sealed, which effectively improves the waterproof performance and insulation withstand voltage of the lightning protection assembly, so that it is more safe and reliable in harsh environment such as thunderstorm season, at the same time, the filler 12 can protect the internal components of the lightning protection assembly for a long time, prolong the service life, and has excellent high temperature resistance and flame retardant performance, and has explosion-proof effect.

[0030] The upper lead tab 40 extends from one end of the ceramic shell 10 and the lower lead tab 50 extends from one end of the ceramic shell 10, and is hooked on the side wall of the ceramic shell 10; And the upper lead tab 40 extends from one end of the ceramic shell 10 and the lower lead tab 50 extends from one end of the ceramic shell 10, which are opposite to each other and on the same horizontal plane, which can facilitate the patch installation of the lightning protection assembly.

[0031] The upper conductive piece 40 includes an integrally connected sheet-shaped upper contact portion 41 and an upper hook portion 42. The upper contact portion 41 contacts one of the pins 21 of the varistor 20, and the upper hook portion 42 is hooked onto one side edge of the ceramic housing 10. The lower conductive piece 50 includes an integrally connected disc-shaped lower contact portion 51, an extension portion 52, and a lower hook portion 53. The lower contact portion 51 is in close contact with the lower end of the TSS discharge tube (the disc-shaped structure increases the contact area and improves contact stability), and the extension portion 52 is in contact with the ceramic housing 10. On the inner wall of the ceramic housing 10, a stable fit is formed between the lower guide piece 50 and the ceramic housing 10; the lower hook portion 53 is hooked onto the other side edge of the ceramic housing 10; the upper hook portion 42 and the lower hook portion 53 respectively form hook grooves, the width of the hook grooves matching the thickness of the side wall of the ceramic housing 10, making the fit between the upper hook portion 42 and the lower hook portion 53 and the ceramic housing 10 more stable, and also making the subsequent surface mount soldering more secure (the upper hook portion 42 and the lower hook portion 53 are used for electrical connection with other electronic components).

[0032] The intermediate conductive piece 60 includes a first contact portion 61, a second contact portion 62, and a connecting portion 63 integrally connected between the first contact portion 61 and the second contact portion 62. The first contact portion 61 is disc-shaped and contacts the upper end of the TSS discharge tube. The second contact portion 62 contacts the other pin 21 of the varistor 20. The connecting portion 63 is tightly fitted to the outer wall of the varistor 20. The intermediate conductive piece 60 connects the varistor 20 and the TSS discharge tube 30 in series. The first contact portion 61, the second contact portion 62, and the connecting portion 63 of the intermediate conductive piece 60 form a U-shaped mating groove 64. The width of the U-shaped mating groove 64 matches the thickness of the varistor 20. The side of the varistor 20 that contacts the second contact portion 62 is tightly embedded in the U-shaped mating groove 64. The U-shaped mating groove 64 provides a tight fit between the intermediate conductive piece 60 and the varistor 20, improving the stability of the series connection between the varistor 20 and the TSS discharge tube 30.

[0033] The advantages of using varistor 20 and TSS discharge tube 30 (gas discharge tube) in series as a surge protection component compared to using varistor 20 alone as a surge protection component mainly include the following:

[0034] First, it improves withstand voltage: series configuration can provide higher withstand voltage, which is suitable for applications that need to withstand higher voltage.

[0035] Second, reduce residual voltage: By using them in series, the residual voltage after a lightning strike can be reduced more effectively, thus improving the safety of the equipment.

[0036] Third, the response speed: TSS discharge tube 30 response speed than the pressure sensitive resistor 20, can reach nanosecond level, and the pressure sensitive resistor 20 response time is about 25ns or so, this fast response helps to rise in voltage quickly conduction, protection equipment.

[0037] The pressure sensitive resistor 20 and TSS discharge tube 30 are used in series as a lightning protection component, compared with single pressure sensitive resistor 20, can provide more comprehensive protection, reduce residual voltage, reduce leakage current, improve voltage capacity, and enhance the safety of the system.

[0038] The utility model discloses a design emphasis lies in, through the pressure sensitive resistor and TSS discharge tube series encapsulation in ceramic shell formation lightning protection component, compared with single use pressure sensitive resistor, can provide higher safety voltage protection.This combination utilizes the fast response of pressure sensitive resistor and the large current bearing capacity of TSS discharge tube, effectively reduces residual voltage, and the fast response speed of TSS discharge tube ensures that when voltage surge can quickly and safely turn on and turn off, thereby improves the safety voltage level of whole lightning protection system, protects sensitive equipment from the influence of high voltage impact.

[0039] The above, only the preferred embodiment of the utility model, not any limit to the technical scope of the utility model, so all the fine modification, equivalent change and modification of the technical essence according to the utility model to the above embodiment, still belong to the range of the utility model technical scheme.

Claims

1. A series compound lightning protection assembly, characterized by: The application relates to a ceramic shell, a pressure-sensitive resistor, a TSS discharge tube, an upper lead, a lower lead and an intermediate lead, wherein the ceramic shell has a containing space; the pressure-sensitive resistor and the TSS discharge tube are stacked in the containing space; one end of the upper lead is in contact with a pin of the pressure-sensitive resistor, and the other end of the upper lead extends out of the ceramic shell; one end of the lower lead is in contact with one end of the TSS discharge tube, and the other end of the lower lead extends out of the ceramic shell; and the intermediate lead is connected between the other end of the TSS discharge tube and the other pin of the pressure-sensitive resistor.

2. The series compound lightning protection assembly of claim 1, wherein: The containing space of the ceramic shell has a filler, and the pressure-sensitive resistor, the TSS discharge tube, the upper lead, the lower lead and the intermediate lead are encapsulated in the containing space by the filler.

3. The series compound lightning protection assembly of claim 1, wherein: The upper lead extending out of one end of the ceramic shell and the lower lead extending out of one end of the ceramic shell are respectively hooked on the side wall of the ceramic shell.

4. The series compound lightning protection assembly of claim 3, wherein: The upper lead extending out of one end of the ceramic shell and the lower lead extending out of one end of the ceramic shell are opposite to each other and are in the same horizontal plane.

5. The series compound lightning protection assembly of claim 1, wherein: The upper lead comprises an upper contact part and an upper hook part which are integrally connected, the upper contact part is in contact with a pin of the pressure-sensitive resistor, and the upper hook part is hooked on the side edge of the ceramic shell; the lower lead comprises a disc-shaped lower contact part, an extension part and a lower hook part which are integrally connected, the lower contact part is close to the lower end of the TSS discharge tube, the extension part is attached to the inner wall of the ceramic shell, and the lower hook part is hooked on the other side edge of the ceramic shell.

6. The series compound lightning protection assembly of claim 1, wherein: The intermediate lead comprises a first contact part, a second contact part and a connecting part which are integrally connected between the first contact part and the second contact part, the first contact part is disc-shaped and is in contact with the upper end of the TSS discharge tube, the second contact part is in contact with the other pin of the pressure-sensitive resistor, and the connecting part is closely attached to the outer wall of the pressure-sensitive resistor.

7. The series compound lightning protection assembly of claim 6, wherein: The first contact part, the second contact part and the connecting part of the intermediate lead are surrounded to form a U-shaped matching groove, the width of the U-shaped matching groove matches the thickness of the pressure-sensitive resistor, and the side of the pressure-sensitive resistor in contact with the second contact part is closely embedded in the U-shaped matching groove.

8. The series compound lightning protection assembly of claim 2, wherein: The filler is silicone rubber or epoxy resin.

9. The series compound lightning protection assembly of claim 1, wherein: The pressure-sensitive resistor is above the TSS discharge tube, and the upper surface of the pressure-sensitive resistor is lower than the opening of the containing space.

10. The series compound lightning protection assembly of claim 5, wherein: The upper hook part and the lower hook part respectively form hooking grooves, and the width of the hooking grooves matches the thickness of the side wall of the ceramic shell.

Images