AC power surge protector

Abstract

The present application discloses an AC power surge protector, which relates to the technical field of power surge protection, and includes a cylinder body, a cover body, an electrode column and a varistor group, wherein the electrode column is coated with a first insulator, a second insulator is arranged in the cylinder body, a positioning groove for placing the varistor group is arranged in the second insulator, the varistor group includes a plurality of varistors stacked in sequence, and each varistor is coaxially placed in the positioning groove, the surface of the varistor is provided with an aluminum sand surface, and a sand pit is arranged on the aluminum sand surface, an aluminum film is arranged between two adjacent varistors, and a clamping structure for clamping the electrode column against the varistor group is arranged on the cylinder body. A gas discharge tube is also installed in the cylinder body, and the gas discharge tube is respectively connected to the varistor group and the cylinder body, and a grounding column is arranged at the bottom end of the cylinder body. The present application ensures that each varistor can evenly share the voltage and current, thereby extending the service life of the AC power surge protector.

Description

Technical Field

[0001] The present application relates to the technical field of power surge protection, and in particular to an AC power surge protector. Background Art

[0002] AC power surge protector is a device used to protect electrical and electronic equipment from surge voltage and transient overvoltage damage on power lines. When a spike current or voltage suddenly occurs in an electrical system, communication line or the Internet due to external interference, the surge protector can conduct and shunt in a very short time, thereby preventing the surge from damaging other devices in the circuit.

[0003] Traditional AC power surge protectors use an insulating sleeve to wrap the electrode column and an insulating film to wrap the varistor, so that the electrode column and the varistor are respectively insulated from the inner wall of the cylinder body. However, when the varistor is wrapped with an insulating film, adjacent varistors are prone to misalignment or eccentricity, resulting in the inability to evenly share the voltage and current between the varistors, causing some varistors to be overloaded while other varistors fail to fully function, which will cause the varistors to age or be damaged prematurely, thereby shortening the service life of the AC power surge protector. Summary of the invention

[0004] In view of the problems existing in the prior art, the present application provides an AC power surge protector.

[0005] The present application provides an AC power surge protector, which adopts the following technical solution:

[0006] An AC power surge protector comprises a cylinder body, a cover body, an electrode column and a varistor group, wherein the electrode column is coated with a first insulator, the cylinder body is provided with a second insulator, the second insulator is provided with a positioning groove for placing the varistor group, the varistor group comprises a plurality of varistors stacked in sequence, and each of the varistors is coaxially arranged, the surface of the varistor is provided with an aluminum sand surface, and the aluminum sand surface is provided with sand pits, an aluminum film is provided between two adjacent varistors, and the cylinder body is provided with a clamping structure for pressing the electrode column against the varistor group; the bottom of the second insulator is provided with an installation opening connected to the positioning groove, a gas discharge tube is provided in the installation opening, the gas discharge tube is connected to the varistor group and the cylinder body respectively, and a grounding column is provided at the bottom of the cylinder body.

[0007] Optionally, the clamping structure includes a fixing ring fixed to the top wall of the cylinder body by bolts, the first insulator is inserted into the fixing ring, and the side wall of the first insulator is provided with a boss for abutting the fixing ring, the side wall of the electrode column is fixedly provided with a support, and the first insulator is provided with a crimping portion for clamping the support.

[0008] Optionally, a plurality of clamping rings are sleeved on the electrode column, the clamping rings are wavy in shape, and are made of elastic material, the clamping ring located at the bottom abuts against the support platform, and the crimping portion is crimped against the clamping ring located at the top.

[0009] Optionally, the wall thickness of the second insulator is less than 2 mm, and the side wall of the second insulator is fixedly provided with reinforcing bones, and adjacent reinforcing bones are gap-fitted.

[0010] Optionally, an exhaust port connected to the positioning groove is provided at the bottom end of the second insulator, and a cutting edge for gas circulation is provided on the side wall of the second insulator.

[0011] Optionally, both electrode ends of the gas discharge tube are connected to circular electrode sheets, wherein the circular electrode sheet of one electrode end abuts against the pressure-sensitive group, and the circular electrode sheet of the other electrode end abuts against the cylinder body.

[0012] Optionally, a first annular sealing groove is formed on the side wall of the electrode column along the circumference of the electrode column, a first sealing rubber ring is arranged in the first annular sealing groove, and the first sealing rubber ring abuts against the inner side wall of the first insulator.

[0013] Optionally, a second annular sealing groove is formed on the top wall of the cylinder body along the circumference of the cylinder body, a second sealing rubber ring is arranged in the second annular sealing groove, and the second sealing rubber ring abuts against the fixing ring.

[0014] Optionally, a plug-in portion is provided on the first insulator, and a plug-in slot connected to the positioning slot is provided on the top of the second insulator, and the plug-in slot is adapted to the plug-in portion and is used for inserting the plug-in portion.

[0015] Optionally, a connecting surface is provided at the connecting end of the plug-in slot and the positioning slot, and the connecting surface is inclined; the electrode column and the varistor are coaxially arranged, the bottom end of the electrode column is provided with a chamfer, and the diameter of the bottom end of the electrode column is equal to the diameter of the varistor.

[0016] In summary, the present application includes at least one of the following beneficial technical effects:

[0017] 1. Place each varistor on the varistor group in the positioning groove on the second insulator, and press the varistor group through the electrode column to ensure that each varistor is placed coaxially. At the same time, by setting the surface of the varistor to an aluminum sand surface and placing an aluminum film between two adjacent varistors, when the aluminum film is compressed and deformed, it can fill the aluminum sand pit, thereby improving the contact effect between adjacent varistors and avoiding misalignment between adjacent varistors, ensuring that each varistor can evenly share the voltage and current, thereby extending the service life of the AC power surge protector.

[0018] 2. By setting a gas discharge tube, the two ends of the gas discharge tube are connected to the varistor and the cylinder body respectively, and the gas discharge tube is connected in series between the varistor and the cylinder body. When the line overvoltage exceeds the predetermined value, the varistor and the gas discharge tube are started, and the surge current is discharged to the ground from the grounding column on the cylinder body through the varistor and the gas discharge tube; and after adding the gas discharge tube, the transient overvoltage tolerance of the product is further improved, and the non-power frequency continuous current of the varistor and the low residual voltage and failure open circuit characteristics of the gas discharge tube are utilized. After being connected in series, it can not only ensure that the voltage protection level of the whole machine meets the demand, but also meet the non-power frequency continuous current; more importantly, the failure of the gas discharge tube is in an open circuit mode to avoid short-circuit failures caused by the failure of the varistor.

[0019] 3. The boss on the first insulator is pressed by the fixing ring, and the base on the electrode column is pressed by the crimping part in the first insulator, so that the electrode column is firmly installed in the cylinder body, and the electrode column is pressed against the pressure-sensitive group, thereby ensuring the contact effect and conductive performance between the electrode column and the pressure-sensitive group.

[0020] 4. The multiple clamping rings sleeved on the electrode column are wavy and made of elastic material, so that there is a good clamping effect between the first insulator and the electrode column, ensuring that the electrode column is pressed against the pressure-sensitive group, improving the contact effect between the electrode column and the pressure-sensitive group, and improving the conductivity and the stability of current and voltage transmission; at the same time, the wavy design and the use of elastic materials enable the clamping ring to buffer and disperse the pressure when it is under pressure, avoiding poor contact or wear caused by long-term use.

[0021] 5. The wall thickness of the second insulator is controlled within 2 mm, so that the second insulator has an extremely thin wall thickness. Combined with the design of the reinforcement frame, the strength of the second insulator structural plate is ensured while effectively reducing costs and weight.

[0022] 6. The second insulator is designed with exhaust ports and cut edges to improve the air flow inside the cylinder so that the heat of the varistor can be dissipated to the cavity of the cylinder, thereby enhancing the heat dissipation effect and preventing the local overheating and expansion of the second insulator from causing damage to the varistor; and in the case of instantaneous heat generation, it can also be effectively buffered to prevent the expansion of the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a cross-sectional view of the overall structure of an embodiment of the present application;

[0024] Figure 2 is a schematic diagram of the structure of the pressure-sensitive group used in the embodiment of the present application;

[0025] Figure 3 is a schematic diagram of the structure of a gas discharge tube used in an embodiment of the present application;

[0026] Figure 4It is a schematic diagram of the structure of the clamping ring used in the embodiment of the present application;

[0027] Figure 5 It is a schematic diagram of the structure of the second insulator used in an embodiment of the present application.

[0028] Explanation of the accompanying drawings: 1. Cylinder body; 11. Grounding column; 12. Fixing ring; 13. Second sealing rubber ring; 2. Cover body; 21. Through hole; 3. Electrode column; 31. Chamfer; 32. Support platform; 33. Pressing ring; 34. First sealing rubber ring; 4. Pressure-sensitive group; 41. Varistor; 411. Aluminum sand surface; 42. Aluminum film; 5. First insulator; 51. Plug-in part; 52. Boss; 53. Crimping part; 6. Second insulator; 61. Positioning groove; 62. Plug-in groove; 63. Connecting surface; 64. Installation port; 65. Reinforcement bone; 66. Exhaust port; 67. Cutting edge; 7. Gas discharge tube; 71. Circular electrode sheet. DETAILED DESCRIPTION

[0029] The following will be combined with the attached Figure 1 -Attached Figure 5 , the technical solutions in the embodiments of the present invention are clearly and completely described. The described embodiments are only possible technical implementations of the present invention, not all possible implementations. Those skilled in the art can completely combine the embodiments of the present invention to obtain other embodiments without creative work, and these embodiments are also within the scope of protection of the present invention.

[0030] The inventor of this application has found that the conventional AC power surge protector uses an insulating film to wrap the varistor, which easily causes misalignment or eccentricity between adjacent varistors, resulting in the inability to evenly share the voltage and current between the varistors, causing some varistors to be overloaded while other varistors fail to fully function, which will cause premature aging or damage to the varistors, thereby shortening their service life. To this end, this application discloses an AC power surge protector, which mainly adopts the following scheme:

[0031] The present application embodiment discloses an AC power surge protector. Figure 1 , comprising a cylinder body 1, a cover body 2, an electrode column 3 and a pressure-sensitive group 4, the electrode column 3 is coated with a first insulator 5, a second insulator 6 is arranged in the cylinder body 1, a positioning groove 61 for placing the pressure-sensitive group 4 is arranged in the second insulator 6, the pressure-sensitive group 4 comprises a plurality of varistors 41 stacked in sequence, and each varistor 41 is coaxially placed in the positioning groove 61, and a pressing structure for pressing the electrode column 3 against the pressure-sensitive group 4 is arranged on the cylinder body 1.

[0032] Reference Figure 1The cylinder body 1 and the cover body 2 are both made of metal. Specifically, the cylinder body 1 and the cover body 2 can be made of aluminum alloy or copper stainless steel. The cover body 2 is covered on the top of the cylinder body 1. A through hole 21 is opened on the cover body 2. The electrode column 3 is inserted into the through hole 21, and the first insulator 5 is padded in the gap between the electrode column 3 and the through hole 21.

[0033] Reference Figure 1 and Figure 2 The upper and lower end faces of the varistor 41 are both set to aluminum sand surface 411, and sand pits are set on the aluminum sand surface 411. An aluminum film 42 is set between two adjacent varistors 41. When the aluminum film 42 is compressed and deformed, the aluminum sand pits can be filled, thereby improving the contact effect between adjacent varistors 41 and avoiding misalignment between adjacent varistors 41, ensuring that each varistor 41 can evenly share the voltage and current, thereby extending the service life of the AC power surge protector; glue cannot be poured between adjacent varistors 41, because the glue will penetrate into the aluminum sand surface 411, and the surface of the varistor 41 cannot be set to a smooth surface, and it is difficult to achieve absolute compression on the smooth surface.

[0034] Reference Figure 1 The first insulator 5 is made of silicone rubber or polyethylene material, which has good insulation performance and high temperature resistance. The first insulator 5 is coated on the electrode column 3. The second insulator 6 is installed in the cylinder body 1 and is adapted to the inside of the cylinder body 1. The second insulator 6 is made of polyethylene or polypropylene material, which has good insulation performance and mechanical strength.

[0035] Reference Figure 1 A plug-in portion 51 is provided at the bottom end of the first insulator 5, and a plug-in groove 62 connected with the positioning groove 61 is provided at the top of the second insulator 6. The plug-in groove 62 is adapted to the plug-in portion 51, and the plug-in portion 51 on the first insulator 5 is plugged into the plug-in groove 62 of the second insulator 6, so as to facilitate the limitation of the relative position of the first insulator 5 and the second insulator 6, and at the same time, the electrode column 3 and the pressure-sensitive group 4 are completely isolated from the inside of the cylinder body 1.

[0036] Reference Figure 1 The connecting end of the plug-in slot 62 and the positioning slot 61 is provided with a connecting surface 63, and the connecting surface 63 is inclined; the electrode column 3 and the varistor 41 are coaxially arranged, and the bottom end of the electrode column 3 is provided with a chamfer 31, and the diameter of the bottom end of the electrode column 3 is equal to the diameter of the varistor 41, so that a creepage effect is formed between the electrode column 3 and the varistor 41, thereby increasing the electrical conduction effect between the electrode column 3 and the varistor group 4.

[0037] Reference Figure 1The bottom of the second insulator 6 is provided with an installation opening 64 connected to the positioning groove 61, and a gas discharge tube 7 is arranged in the installation opening 64. The gas discharge tube 7 is made of a gas-filled material and has good discharge performance. The two electrode ends of the gas discharge tube 7 are respectively connected to the varistor group 4 and the cylinder body 1 to form an effective conductive channel. The bottom end of the cylinder body 1 is provided with a grounding column 11; by arranging the gas discharge tube 7, the two ends of the gas discharge tube 7 are respectively connected to the varistor group 4 and the cylinder body 1, and the gas discharge tube 7 is connected in series between the varistor 41 and the cylinder body 1. When the line overvoltage exceeds a predetermined value, the gas discharge tube 7 is connected to the varistor 41 and the cylinder body 1. When the value is reached, the varistor 41 and the gas discharge tube 7 are started, and the surge current is discharged from the grounding column 11 on the cylinder body 1 to the ground through the varistor 41 and the gas discharge tube 7; and after adding the gas discharge tube 7, the transient overvoltage tolerance of the product is further improved, and the non-power frequency continuous current of the varistor 41 and the low residual voltage and failure open circuit characteristics of the gas discharge tube 7 are utilized. After being connected in series, it can not only ensure that the voltage protection level of the whole machine meets the demand, but also meet the non-power frequency continuous current; more importantly, the failure of the gas discharge tube 7 is in open circuit mode to avoid short-circuit faults caused by the failure of the varistor 41.

[0038] Reference Figure 1 and Figure 3 , the two electrode ends of the gas discharge tube 7 are connected with circular electrode sheets 71, wherein the circular electrode sheet 71 of one electrode end abuts against the varistor group 4, and the circular electrode sheet 71 of the other electrode end abuts against the inner wall of the cylinder body 1. By setting the circular electrode sheet 71, the planar contact area with the varistor 41 or the cylinder body 1 is increased, so that the electrode end of the gas discharge tube 7 can be effectively connected with the varistor group 4 and the cylinder body 1. Furthermore, the circular electrode sheet 71 close to the side of the varistor group 4 can be designed with different thicknesses, thereby adjusting the position of the varistor group 4 in the positioning groove 61, and fine-tuning the height of the electrode column 3 exposed from the cylinder body 1. In addition, the circular electrode sheet 71 close to the side of the varistor group 4 can also be formed with different thicknesses by overlapping.

[0039] Reference Figure 1The clamping structure includes a fixing ring 12, which is fixed to the cylinder body 1 by bolts, and the fixing ring 12 is sleeved on the first insulator 5, and the side wall of the first insulator 5 is provided with a boss 52 for abutting the fixing ring 12, and the side wall of the electrode column 3 is fixedly provided with a support 32, and the first insulator 5 is provided with a crimping portion 53 for pressing the support 32; when the electrode column 3 is installed, the boss 52 on the first insulator 5 is pressed by the fixing ring 12, and the support 32 on the electrode column 3 is pressed by the crimping portion 53 in the first insulator 5, so that The electrode column 3 is firmly installed in the cylinder body 1, and the electrode column 3 is pressed against the pressure-sensitive group 4, so that the contact effect and the conductive performance between the electrode column 3 and the pressure-sensitive group 4 are ensured; and by loosening the bolts on the fixing ring 12 and removing the fixing ring 12 from the cylinder body 1, the cylinder body 1 can be opened, and the electrode column 3 and the pressure-sensitive group 4 inside the cylinder body 1 can be maintained or replaced; further, the base 32 on the electrode column 3 is pressed against by the crimping portion 53 in the first insulator 5, so that the contact effect and the conductive performance between the electrode column 3 and the pressure-sensitive group 4 are further ensured.

[0040] Reference Figure 1 and Figure 4 A plurality of clamping rings 33 are sleeved on the electrode column 3, each clamping ring 33 is located between the support platform 32 and the crimping portion 53, the clamping ring 33 is wavy and made of elastic metal material, the clamping ring 33 located at the bottom is in contact with the support platform 32, and the crimping portion 53 is crimped with the clamping ring 33 located at the top; through the setting of the clamping ring 33, a good clamping effect is achieved between the first insulator 5 and the electrode column 3, ensuring that the electrode column 3 is pressed against the pressure-sensitive group 4, improving the contact effect between the electrode column 3 and the pressure-sensitive group 4, and improving the conductive performance and the stability of current and voltage transmission; at the same time, the wavy design and the use of elastic materials enable the clamping ring 33 to buffer and disperse the pressure when it is subjected to pressure, thereby avoiding poor contact or wear caused by long-term use.

[0041] Reference Figure 1 In order to enhance the sealing performance between the first insulator 5 and the electrode column 3 and prevent water vapor and dust from entering the cylinder body 1, a first sealing rubber ring 34 is sleeved on the electrode column 3. The first sealing rubber ring 34 is made of silicone rubber or fluororubber material. The side wall of the electrode column 3 is provided with a first annular sealing groove along the circumference of the electrode column 3. The first sealing rubber ring 34 is arranged in the first annular sealing groove. The first sealing rubber ring 34 is limited by the first annular sealing groove. The first sealing rubber ring 34 abuts against the inner wall of the first insulator 5 to form a sealing structure.

[0042] Reference Figure 1A second annular sealing groove is opened on the top wall of the cylinder body 1 along the circumference of the cylinder body 1, and a second sealing rubber ring 13 is arranged in the second annular sealing groove. The second sealing rubber ring 13 is also made of silicone rubber or fluororubber material, and the second sealing rubber ring 13 abuts against the fixing ring 12 to enhance the sealing performance between the fixing ring 12 and the cylinder body 1.

[0043] Reference Figure 5 The wall thickness of the second insulator 6 is less than 2 mm, and the wall thickness of the second insulator 6 is preferably 1-1.5 mm to ensure sufficient insulation strength. A plurality of reinforcing bones 65 are fixedly provided on the side wall of the second insulator 6. The reinforcing bones 65 are integrally formed with the second insulator 6, and a cavity is formed between adjacent reinforcing bones 65. The design of the reinforcing bones 65 ensures the mechanical strength of the second insulator 6. At the same time, the second insulator 6 adopts a lightweight design, which effectively saves costs and reduces the overall weight of the equipment.

[0044] Reference Figure 1 and Figure 5 A plurality of exhaust ports 66 connected to the positioning groove 61 are provided at the bottom end of the second insulator 6, and the exhaust ports 66 are evenly spaced along the circumference of the mounting port 64. The side wall of the second insulator 6 is provided with a cutting edge 67 for gas circulation. A frustum is provided on the lower end surface of the cylinder body 1, so that the bottom wall of the second insulator 6 and the lower end surface of the cylinder body 1 are spaced apart, and a channel for gas fluid is formed between the bottom end of the second insulator 6 and the lower end surface of the cylinder body 1, and the exhaust ports 66 are connected to the channel; by setting the exhaust ports 66 and the cutting edges 67, the internal air flow is improved, so that the heat can be dissipated to the cavity of the cylinder body 1, thereby enhancing the heat dissipation effect and preventing the second insulator 6 from being locally overheated and expanded, thereby preventing the varistor 41 from being damaged; and in the case of instantaneous heat generation, it can also be effectively buffered to prevent the shell from expanding.

[0045] The implementation principle of an AC power surge protector in an embodiment of the present application is as follows: a first insulator 5 is provided to isolate the electrode column 3 from the cylinder body 1 to ensure insulation performance; a second insulator 6 is installed in the cylinder body 1, each varistor 41 on the varistor group 4 is placed in a positioning groove 61 on the second insulator 6, and the varistor group 4 is pressed by the electrode column 3 to ensure that each varistor 41 is placed coaxially. At the same time, by setting the surface of the varistor 41 as an aluminum sand surface 411 and placing an aluminum film 42 between two adjacent varistors 41, when the aluminum film 42 is deformed under pressure, the aluminum sand pit can be filled, thereby improving the contact effect between adjacent varistors 41 and avoiding misalignment between adjacent varistors 41, ensuring that each varistor 41 can evenly share voltage and current, thereby extending the service life of the AC power surge protector.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An AC power surge protector, comprising a cylinder (1), a cover (2), an electrode column (3) and a pressure sensitive group (4), characterized in that: The electrode column (3) is coated with a first insulator (5), the cylinder body (1) is provided with a second insulator (6), the second insulator (6) is provided with a positioning groove (61) for placing a varistor group (4), the varistor group (4) comprises a plurality of varistors (41) stacked in sequence, and each of the varistors (41) is coaxially placed in the positioning groove (61), the surface of the varistor (41) is provided with an aluminum grit surface (411), and the aluminum grit surface (411) is provided with There is a sand pit, an aluminum film (42) is arranged between two adjacent varistors (41), and a pressing structure for pressing the electrode column (3) against the varistor group (4) is arranged on the cylinder body (1); a mounting opening (64) connected to the positioning groove (61) is opened at the bottom of the second insulator (6), a gas discharge tube (7) is arranged in the mounting opening (64), and the gas discharge tube (7) is respectively connected to the varistor group (4) and the cylinder body, and a grounding column (11) is arranged at the bottom end of the cylinder body (1); The wall thickness of the second insulator (6) is less than 2 mm, and a reinforcing bone (65) is fixedly provided on the side wall of the second insulator (6), and adjacent reinforcing bones (65) are gap-matched to form a cavity; The bottom end of the second insulator (6) is provided with an exhaust port (66) connected to the positioning groove (61); the side wall of the second insulator (6) is provided with a cutting edge (67) for gas circulation; the lower end surface of the cylinder body (1) is provided with a truncated cone, so that the bottom wall of the second insulator (6) and the lower end surface of the cylinder body (1) are spaced apart, and a channel for supplying gas fluid is formed between the bottom end of the second insulator (6) and the lower end surface of the cylinder body (1), and the exhaust port (66) is connected to the channel.

2. The AC power surge protector according to claim 1, characterized in that: The clamping structure comprises a fixing ring (12) fixed to the top wall of the cylinder body (1) by bolts, the first insulator (5) is inserted into the fixing ring (12), and the side wall of the first insulator (5) is provided with a boss (52) for abutting against the fixing ring (12), the side wall of the electrode column (3) is fixedly provided with a support (32), and the first insulator (5) is provided with a crimping portion (53) for clamping the support (32).

3. The AC power surge protector according to claim 2, characterized in that: The electrode column (3) is sleeved with a plurality of clamping rings (33), the clamping rings (33) are wavy in shape, and the clamping rings (33) are made of elastic material. The clamping ring (33) located at the bottom is in contact with the support platform (32), and the crimping portion (53) is crimped with the clamping ring (33) located at the top.

4. The AC power surge protector according to claim 1, characterized in that: Both electrode ends of the gas discharge tube (7) are connected to circular electrode sheets (71), wherein the circular electrode sheet (71) of one electrode end abuts against the pressure sensitive group (4), and the circular electrode sheet (71) of the other electrode end abuts against the cylinder body (1).

5. The AC power surge protector according to claim 1, characterized in that: A first annular sealing groove is provided on the side wall of the electrode column (3) along the circumference of the electrode column (3), a first sealing rubber ring (34) is provided in the first annular sealing groove, and the first sealing rubber ring (34) abuts against the inner side wall of the first insulator (5).

6. The AC power surge protector according to claim 2, characterized in that: A second annular sealing groove is provided on the top wall of the cylinder body (1) along the circumference of the cylinder body (1), a second sealing rubber ring (13) is provided in the second annular sealing groove, and the second sealing rubber ring (13) abuts against the fixing ring (12).

7. The AC power surge protector according to claim 1, characterized in that: The first insulator (5) is provided with an inserting portion (51), and the top of the second insulator (6) is provided with an inserting groove (62) connected with the positioning groove (61); the inserting groove (62) is adapted to the inserting portion (51) and is used for the inserting portion (51) to be inserted.

8. The AC power surge protector according to claim 7, characterized in that: The connecting end of the plug-in slot (62) and the positioning slot (61) is provided with a connecting surface (63), and the connecting surface (63) is arranged obliquely; the electrode column (3) and the varistor (41) are arranged coaxially, the bottom end of the electrode column (3) is provided with a chamfer (31), and the diameter of the bottom end of the electrode column (3) is equal to the diameter of the varistor (41).

Images