A new structure of high-voltage ceramic capacitor insulation protection

Abstract

The application discloses a novel high-voltage ceramic capacitor insulation protection structure, which comprises a base, a positioning seat connected to the base, a limiting gasket I connected to the positioning seat, an upper shell sealingly connected to the base, a limiting seat connected to the upper shell, a limiting gasket II connected to the limiting seat, an insulation layer coated on the inner walls of the base and the upper shell, a pin hole provided in the upper shell, and an insulation sleeve embedded in the pin hole; a limiting lock column movably connected to the base, a lock block connected to the upper shell, a lock groove provided in the limiting lock column, and a lock block inserted into the lock groove; a control block, a limiting rod provided in the upper shell and rotatably connected through the control block; and a heat dissipation structure. The novel insulation protection structure can realize closed protection on the capacitor main body, double-layer insulation can improve the electrical safety margin, the creepage path can be prolonged, and the surface discharge between the pin and the shell can be prevented.

Description

Technical Field

[0001] This invention relates to the field of capacitor insulation protection structure technology, and in particular to a novel insulation protection structure for high-voltage ceramic capacitors. Background Technology

[0002] High-voltage ceramic capacitors are capacitors that use ceramic materials as the dielectric. They are characterized by high voltage withstand, small size, and low loss, and are widely used in power electronics, communication equipment, and high-voltage power supplies. In practical applications, ceramic capacitors require an insulating protective structure to prevent external environmental contamination, moisture, or mechanical damage to the capacitor body, while also ensuring electrical insulation between the capacitor and surrounding components.

[0003] Chinese patent CN220873417U discloses a capacitor with protective function, including a body, an inner protective shell, an outer protective shell, and an end cap. The inner protective shell is attached to and fixedly connected to the outside of the body. Several air columns are provided on the outer surface of the inner protective shell. The outer protective shell is sleeved on the outside of the inner protective shell. The inner wall of the outer protective shell is connected to the air columns. The outer protective shell is integrally formed and includes a first protective layer, a second protective layer, and a connecting ring. A gap is formed between the first protective layer and the second protective layer. The end cap is fixed to the upper side of the body, and the lower end face of the end cap is attached to the upper end face of the body. A pin protection cover is integrally formed on the end cap. A through hole is opened on the pin protection cover and a rubber hose is fixedly connected thereto.

[0004] This type of protective structure has the following shortcomings: 1. Because the outer shell and end cap are fixedly connected, the protective structure is not easy to disassemble and assemble, making it inconvenient to perform daily maintenance and periodic inspection of the capacitor body; 2. It requires complicated positioning steps, resulting in low assembly efficiency. In addition, if an internal fault occurs or the capacitor needs to be replaced, it is also necessary to remove the capacitor body by complicated procedures or even damaging the protective structure; 3. The positioning stability of the capacitor is poor, and it is easy to cause uneven electric field distribution.

[0005] In summary, existing novel insulation and protection structures suffer from drawbacks such as inconvenient assembly and disassembly of the protective structure, unstable capacitor positioning, and uneven electric field distribution. Summary of the Invention

[0006] To overcome the shortcomings of existing insulation protection structures, such as inconvenience in disassembly and assembly, unstable capacitor positioning, and uneven electric field distribution, a novel insulation protection structure for high-voltage ceramic capacitors is provided. This structure improves electrical safety margin, achieves enclosed protection, and facilitates disassembly, assembly, inspection, and maintenance.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A novel insulation and protection structure for a high-voltage ceramic capacitor includes a base, a positioning seat connected to the base, a limiting gasket connected to the positioning seat, an upper shell sealed to the base, a limiting seat connected to the upper shell, and a limiting gasket connected to the limiting seat. The inner walls of both the base and the upper shell are coated with an insulating layer. The upper shell has pin holes with insulating sleeves embedded in them. A limiting locking post is movably connected to the base. A locking block is connected to the upper shell, and the limiting locking post has a locking groove, with the locking block inserted into the locking groove. A control block is movably connected to the upper shell. The upper shell has a limiting rod rotatably connected to the control block, and the limiting rod is movably connected to the limiting locking post. A heat dissipation structure includes a vent hole at the bottom of the base, connected to the heat dissipation structure.

[0008] The novel insulating and protective structure consists of a base and an upper shell, forming the main protective housing for the high-voltage ceramic capacitor. The two are sealed together to form a closed cavity. Inside the base, a limiting gasket is fixed via a positioning seat to support the lower end face of the capacitor body. Inside the upper shell, a limiting gasket is fixed via a limiting seat to press against the upper end face of the capacitor body. These two gaskets together provide axial limiting for the capacitor body. The inner walls of both the base and the upper shell are coated with an insulating layer (such as polyimide or epoxy resin), forming an inner insulating barrier that ensures insulation even if the outer shell is damaged. Insulating sleeves (materials can be ceramic or PTFE) are embedded in the pin holes, with the pins passing through the sleeves to increase creepage distance. A limiting locking pin slides into the base, and a locking block on the upper shell inserts into the locking groove for quick locking. A control block drives the limiting rod to rotate, controlling the locking and unlocking of the limiting locking pin. Ventilation holes are provided at the bottom of the base, connected to a heat dissipation structure, for dissipating internal heat from the bottom. The new insulation protection structure achieves sealed protection for the capacitor body; double insulation improves electrical safety margin; extends the creepage path to prevent surface discharge between the pins and the shell; simplifies locking action and enables quick assembly and disassembly, facilitating assembly, inspection and maintenance; and enhances heat dissipation to reduce temperature rise.

[0009] Preferably, the base has a mating groove on its end face, and the upper shell has a raised rib connected to its end face. The raised rib is inserted into the mating groove. The base is connected to a retaining ring, and the gap between the retaining ring and the raised rib is a filling groove filled with a sealing ring. On the mating end faces of the base and the upper shell, the base has an annular mating groove, and the upper shell has an annular raised rib. During assembly, the raised rib is inserted into the groove, forming a labyrinth-like sealing structure, which extends the path for external moisture and dust to enter the shell. The base also has a retaining ring located outside the raised rib, forming an annular filling groove between them. After assembly, a sealing ring is injected into the filling groove. After curing, the sealing ring forms an elastic sealing layer that completely seals the joint. This sealing structure is independent of the labyrinth channel, and the two together form a dual sealing mechanism of "labyrinth + sealing". The labyrinthine channel formed by the ribs and grooves slows down the intrusion of external contaminants; the sealing rings completely seal the joints, preventing moisture infiltration; the double sealing structure significantly improves the durability of the protection level, and even after long-term use and ring aging, the labyrinth structure can still provide basic protection.

[0010] Preferably, the base has a guide post, one end of which is connected to the inner wall of the base, and the other end is connected to a limiting plate. A spring is sleeved on the guide post, and the limiting lock post has a guide hole. The guide post is inserted into the guide hole, one end of which is connected to the inner wall of the base, and the other end of which abuts against the limiting lock post. The guide post is fixedly installed on the inner side wall of the base, and a guide hole is opened inside the limiting lock post. The guide post is inserted into the guide hole, so that the limiting lock post can only slide along the axis of the guide post and cannot deflect or wobble. A spring is sleeved on the guide post, one end of which abuts against the inner wall of the base, and the other end abuts against the end face of the limiting lock post. A limiting plate at the end of the guide post prevents it from falling out. When the limiting lock post is driven to slide inward by the control block, the spring is compressed; when the control block is released, the spring returns to its original position and pushes the limiting lock post to slide outward, realizing an automatic return function. This ensures the movement accuracy of the limit locking pin, preventing jamming or skew; the automatic reset force of the limit locking pin makes the locking operation more convenient, eliminating the need for manual pushback; and the limit plate improves structural reliability.

[0011] Preferably, the upper shell has a guide slide hole, the control block has a slider, the slider is movably connected to the guide slide hole, one end of the slider is connected to the control block, the other end of the slider is connected to a connecting plate, the connecting plate is connected to a connecting post, the upper shell is connected to a rotating rod, one end of the limiting rod has a rotating hole, the rotating rod is inserted into the rotating hole, the limiting rod has a control slide hole, and the connecting post is slidably connected to the control slide hole. The upper shell has a guide slide hole, the bottom of the control block is connected to the slider, the slider passes through the guide slide hole and is fixedly connected to the internal connecting plate, the connecting plate can slide linearly within the range defined by the guide slide hole. A connecting post is fixed on the connecting plate, the connecting post is inserted into the control slide hole on the limiting rod, one end of the limiting rod is sleeved on the rotating rod of the upper shell through the rotating hole, forming a rotation fulcrum. When the operator pushes the control block, the slider drives the connecting plate and the connecting post to move along the guide slide hole, the connecting post slides in the control slide hole, driving the limiting rod to rotate around the rotating rod, the other end of the limiting rod pushes or releases the limiting locking post, realizing the linkage control of locking and unlocking. The guide hole ensures the movement direction of the control block, and the operation feel is clear; the linkage mechanism enables labor-saving operation, and the user only needs to push the control block slightly to complete locking and unlocking.

[0012] Preferably, the connecting plate is connected to a buckle block, and the upper shell is connected to a pin. A buckle is inserted into the pin, and the buckle has a slot. The buckle block engages with the slot. A buckle block extends from one side of the connecting plate, and a pin is fixed to the outer wall of the upper shell. A buckle is movably fitted onto the pin, and the buckle has a slot. When the control block pushes the connecting plate to the locking position, the buckle block aligns perfectly with the slot. The operator presses the buckle to engage the buckle block, achieving a locking engagement. This ensures that even if the operator releases their grip, the control block will not retract due to spring force or vibration, maintaining the limit lock pin in the locked state. To unlock, simply overcome the buckle stress to release the buckle block. This locking structure provides a mechanical locking function for the control block, preventing locking failure due to vibration or accidental contact. The unlocking threshold also makes unlocking convenient and does not affect the overall quick assembly and disassembly process.

[0013] Preferably, the upper shell is connected to a stop block one, and the connecting plate is connected to a stop block two, with stop block one and stop block two arranged opposite to each other. Stop block one is fixedly installed on the inner wall of the upper shell, and stop block two is fixedly installed at the corresponding position on the connecting plate. When the connecting plate slides to a predetermined limit position, stop block two abuts against stop block one, preventing the connecting plate from sliding further, thus limiting and stopping the movement and preventing misalignment of the latch and locking block. This achieves clear "in-place" tactile feedback on the travel limit, helping the operator confirm the locking status; and prevents excessive sliding from causing the limit rod to detach from or be damaged by the limit lock pin.

[0014] Preferably, the heat dissipation structure includes a waterproof and breathable membrane and a heat dissipation bracket. The waterproof and breathable membrane is connected to vents, the positioning seat has mounting holes, the heat dissipation bracket is connected to the mounting holes, and the heat dissipation bracket has heat dissipation channels that communicate with the vents. The vents at the bottom of the base are not directly exposed to the outside, but are connected to the waterproof and breathable membrane and the heat dissipation bracket in sequence. The waterproof and breathable membrane covers the vents (it can be ultrasonically welded or pressed and sealed), and its micropores allow air molecules to pass through but block liquid water. The positioning seat has mounting holes for fixing the heat dissipation bracket. The heat dissipation bracket has a heat dissipation channel inside, one end of which connects to the vents and the other end extends to the bottom of the capacitor body. The heat dissipation bracket can be designed to be made of thermally conductive metal or thermally conductive plastic, which can conduct heat and provide a path for air convection. This achieves "breathing" heat dissipation through the waterproof and breathable membrane, allowing hot air to escape and cold air to enter, while preventing liquid water and dust from entering; the heat dissipation bracket is connected by cavities to form convection channels, improving heat dissipation efficiency; the entire heat dissipation structure is isolated from the electrical parts and will not affect the insulation performance.

[0015] Preferably, the positioning seat has a positioning groove, and the limiting seat has a limiting groove. The positioning groove and the limiting groove are arranged opposite to each other. The limiting seat is connected to a support plate, and the support plate has pin through holes, through which heat shrink tubing is connected. The positioning groove on the positioning seat is used to accommodate a limiting pad and align it with the lower end of the capacitor body; the limiting groove on the limiting seat is used to accommodate a second limiting pad and align it with the upper end of the capacitor body. The positioning groove and the limiting groove are arranged coaxially opposite to each other to ensure that the axis of the capacitor body is centered after assembly. A support plate extends from one side of the limiting seat. The support plate is located on the pin lead-out path. Pin through holes are provided on the plate, and heat shrink tubing is connected to the pin through holes. When the pin passes through, the heat shrink tubing shrinks due to heat and wraps around the outer surface of the pin, forming an outer insulating layer that fits tightly against the pin. The relative arrangement of the positioning groove and the limiting groove ensures the coaxiality of the capacitor body assembly and avoids skewing; the heat shrink tubing further increases the external insulation strength of the leads at the lead-out section and acts as a stress buffer; the support plate structure provides additional support points for the leads and reduces the force on the lead root.

[0016] Preferably, the lead hole has a stepped cross-sectional shape, and a second sealing ring is filled between the lead hole wall and the outer surface of the insulating sleeve. The lead hole is not a uniform diameter through hole, but rather designed as a stepped hole (composed of a series of large-diameter and small-diameter sections, with the diameter gradually changing from the outside to the inside). The insulating sleeve is embedded in the lead hole, forming multiple annular gaps between its outer surface and the hole wall. These gaps are filled with the second sealing ring. Therefore, the stepped structure allows the second sealing ring to be compressed within the hole, forming multiple sealing barriers, with each step being an independent sealing interface. This achieves the following: the stepped hole extends the path length for moisture to penetrate along the lead's axial direction; multiple sealing rings form a series seal, ensuring protection even if one seal fails; the elasticity of the sealing rings compensates for the thermal expansion difference between the lead and the hole wall, preventing gaps caused by temperature changes.

[0017] Preferably, the second limiting pad has a fixing groove, into which an equalizing ring is embedded. The equalizing ring is made of semi-conductive silicone rubber. An annular fixing groove is formed on the end face of the second limiting pad facing the capacitor body. The equalizing ring can be embedded in the groove. The semi-conductive silicone rubber material has both conductivity and elasticity. The ring portion protrudes from the surface of the fixing groove. When the second limiting pad presses against the capacitor body, the equalizing ring is fitted onto the root of the lead. The second limiting pad presses against the equalizing ring. Because the semi-conductive silicone rubber has a certain resistivity, it will not cause a short circuit. At the same time, it effectively smooths the electric field distribution in this area, "flattening" the electric field at the tip of the lead root to the entire ring surface. This achieves the goal of effectively improving the electric field concentration at the edge of the upper end face of the capacitor body through the equalizing ring, preventing corona discharge and surface flashover; absorbing vibration and adhering tightly to the ceramic surface, avoiding air gap residue; the fixing groove embedding method simplifies assembly, requires no additional fasteners, and does not increase the difficulty of disassembly and assembly.

[0018] The beneficial effects of this invention are: it achieves sealed protection of the capacitor body through a novel insulating and protective structure; double-layer insulation improves electrical safety margin; it extends the creepage path to prevent surface discharge between the pins and the casing; it simplifies the locking action, enables quick assembly and disassembly, and facilitates assembly, inspection, and maintenance; it enhances heat dissipation to reduce temperature rise; it helps the operator confirm the locking status through feedback travel limit; and it provides convenient and stable operation while protecting structural components. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 yes Figure 1 Exploded view; Figure 3 yes Figure 1 Top view; Figure 4 yes Figure 3 Sectional view of AA; Figure 5 yes Figure 3Sectional view of BB; Figure 6 This is a schematic diagram of the internal structure of the upper shell.

[0020] In the diagram: 1. Base, 2. Positioning seat, 3. Limiting gasket one, 4. Upper shell, 5. Limiting seat, 6. Limiting gasket two, 7. Insulating layer, 8. Pin hole, 9. Insulating sleeve, 10. Limiting lock post, 11. Locking block, 12. Locking groove, 13. Control block, 14. Limiting rod, 15. Vent hole, 16. Docking groove, 17. Raised rib, 18. Material retaining ring, 19. Filler groove, 20. Sealing ring one, 21. Guide post, 22. Limiting piece, 23. Spring, 24. Guide hole, 25. Guide slide 26. Hole, 27. Slider, 28. Connecting plate, 29. Connecting post, 30. Rotating rod, 31. Rotating hole, 32. Control sliding hole, 33. Buckle, 34. Insert post, 35. Snap fastener, 36. Snap fastener, 37. Snap fastener, 38. Snap fastener, 39. Snap fastener, 40. Stop block one, 41. Stop block two, 42. Waterproof and breathable membrane, 43. Heat dissipation bracket, 44. Mounting hole, 45. Heat dissipation channel, 46. Positioning groove, 47. Limiting groove, 48. Support plate, 49. Pin through hole, 40. Heat shrink tubing, 40. Sealing ring two, 41. Fixing groove, 42. Pressure equalizing ring. Detailed Implementation

[0021] The present application will be further described below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and does not constitute any limitation on the present application or its application or use. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort fall within the protection scope of this application.

[0022] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary manner according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0023] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of this specification. Any specific values ​​in the examples shown and discussed herein should be interpreted as merely exemplary and not as limitations. Therefore, other exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0024] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application.

[0025] Example 1: like Figure 1 , 2 As shown in Figure 4, a novel insulation and protection structure for a high-voltage ceramic capacitor includes a base 1, a positioning seat 2 connected to the base 1, a limiting gasket 3 connected to the positioning seat 2, an upper shell 4 sealed to the base 1, a limiting seat 5 connected to the upper shell 4, a limiting gasket 6 connected to the limiting seat 5, an insulating layer 7 coating the inner walls of both the base 1 and the upper shell 4, a pin hole 8 with an insulating sleeve 9 embedded in the pin hole 8, a limiting locking post 10 movably connected to the base 1, a locking block 11 connected to the upper shell 4, a locking groove 12 on the limiting locking post 10, and the locking block 11 inserted into the locking groove 12, a control block 13 movably connected to the upper shell 4, a limiting rod 14 rotatably connected to the control block 13, and a heat dissipation structure with a vent hole 15 at the bottom of the base 1, and the heat dissipation structure connected to the vent hole 15.

[0026] like Figure 4 As shown, the end face of the base 1 is provided with a mating groove 16, and the end face of the upper shell 4 is connected with a convex rib 17. The convex rib 17 is inserted into the mating groove 16. The base 1 is connected with a baffle ring 18. The gap between the baffle ring 18 and the convex rib 17 is set as a filling groove 19. The filling groove 19 is filled with a sealing rubber ring 20.

[0027] like Figure 2 , 4As shown, the base 1 is provided with a guide post 21. One end of the guide post 21 is connected to the inner wall of the base 1, and the other end of the guide post 21 is connected to a limit piece 22. A spring 23 is sleeved on the guide post 21. The limit lock post 10 is provided with a guide hole 24. The guide post 21 is inserted into the guide hole 24. One end of the spring 23 is connected to the inner wall of the base 1, and the other end of the spring 23 abuts against the limit lock post 10.

[0028] like Figure 2 , 4 As shown in Figure 5, the upper shell 4 is provided with a guide sliding hole 25, the control block 13 is provided with a slider 26, the slider 26 is movably connected to the guide sliding hole 25, one end of the slider 26 is connected to the control block 13, the other end of the slider 26 is connected to a connecting plate 27, the connecting plate 27 is connected to a connecting post 28, the upper shell 4 is connected to a rotating rod 29, one end of the limiting rod 14 is provided with a rotating hole 30, the rotating rod 29 is inserted into the rotating hole 30, the limiting rod 14 is provided with a control sliding hole 31, and the connecting post 28 is slidably connected to the control sliding hole 31.

[0029] like Figure 4 As shown, the connecting plate 27 is connected to a buckle 32, the upper shell 4 is connected to a post 33, the post 33 is inserted into a buckle 34, the buckle 34 is provided with a slot 35, and the buckle 32 is engaged with the slot 35. The upper shell 4 is connected to a first stop 36, and the connecting plate 27 is connected to a second stop 37, with the first stop 36 and the second stop 37 arranged opposite to each other.

[0030] like Figure 4 As shown, the heat dissipation structure includes a waterproof and breathable membrane 38 and a heat dissipation bracket 39. The waterproof and breathable membrane 38 is connected to the vent 15. The positioning seat 2 is provided with an installation hole 40. The heat dissipation bracket 39 is connected to the installation hole 40. The heat dissipation bracket 39 is provided with a heat dissipation channel 41, which is connected to the vent 15.

[0031] like Figure 5 As shown, the positioning seat 2 is provided with a positioning groove 42, and the limiting seat 5 is provided with a limiting groove 43. The positioning groove 42 and the limiting groove 43 are arranged opposite to each other. The limiting seat 5 is connected to a support plate 44. The support plate 44 is provided with a pin through hole 45. The pin through hole 45 is connected to a heat shrink tubing 46.

[0032] like Figure 6 As shown, the cross-sectional shape of the pin hole 8 is stepped, and a sealing ring 47 is filled between the hole wall of the pin hole 8 and the outer surface of the insulating sleeve 9.

[0033] As shown in 5 and 6, the limiting gasket 2 6 is provided with a fixing groove 48, and a pressure equalizing ring 49 is embedded in the fixing groove 48. The pressure equalizing ring 49 is made of semi-conductive silicone rubber.

[0034] like Figure 1-6As shown: Limiting pad 3 and limiting pad 6 are made of silicone rubber insulating pads, so that limiting pad 3 and limiting pad 6 have the functions of buffering, insulation and anti-slip, preventing vibration from causing friction damage to the insulation layer 7 between the capacitor body and the base 1.

[0035] The inner edges of the base 1 and the upper shell 4, the snap-fit ​​joints, and the perimeter of the pin hole 8 are all rounded. The sharp edges that exist in the replaced right angles will aggravate the electric field distortion. Therefore, the rounded structure can significantly reduce the degree of electric field concentration, which is an effective means to improve the withstand voltage level.

[0036] The base 1, upper shell 4, positioning seat 2, and limiting seat 5 can be made of insulating engineering plastics such as PET or Nylon 66 to ensure temperature resistance and insulation performance.

[0037] The coating material for the insulation layer 7 is epoxy resin, and the coating thickness is controlled within the range of 0.1 to 0.5 mm. The coating is cured by spraying.

[0038] The insulating sleeve 9 is made of PTFE. The mating gap between the insulating sleeve 9 and the pin hole 8 is controlled within 0.1 to 0.3 mm. During installation, it is fixed in the pin hole 8 by adhesive.

[0039] The waterproof and breathable membrane 38 is made of expanded polytetrafluoroethylene (ePTFE) with a micropore diameter of 0.1 to 1.0 μm and an air permeability of ≥1000 mL / cm²•min@7kPa. The waterproof and breathable membrane 38 is fixedly connected to the air vent 15 by ultrasonic welding.

[0040] The equalizing ring 49 is made of semi-conductive silicone rubber with a volume resistivity controlled at 10. 4 ~10 6 Within the Ω•cm range, the equalizing ring 49 is fixed by being pressed and embedded in the fixing groove 48.

[0041] Both sealing ring 1 (20) and sealing ring 2 (47) are made of RTV silicone rubber and are fixed to the target location by filling.

[0042] The heat shrink tubing 46 is made of polyolefin material, ensuring excellent electrical performance and flame retardant rating.

[0043] Assemble the capacitor body and the protective structure: Pass the capacitor leads through the equalizing ring 49, heat shrink tubing 46 and insulating tubing 9 in sequence and extend them from the side of the upper shell 4. Then place the capacitor body in the limiting groove 43 of the limiting seat 5 of the upper shell 4. The limiting pad 6 acts as a buffer between the capacitor body and the limiting seat 5 and fits against one side of the capacitor body. The upper shell 4 is fastened to the base 1: the convex rib 17 is inserted into the mating groove 16. During this process, the fastening block 32 engages with the slot 35 of the buckle 34, and the first stop block 36 abuts against the second stop block 37. Then, the control block 13 slides down, causing the connecting column 28 to push within the control sliding hole 31. Subsequently, one end of the limiting rod 14 rotates on the rotating rod 29, and the other end of the limiting rod 14 pushes the limiting locking column 10 to overcome the elastic force of the spring 23 and insert it into the locking block 11 through the locking block 12. Finally, the limiting locking column 10 is connected to the locking block 11 under the clamping of the limiting rod 14 and the elastic force, ensuring that the lower shell 4 cannot detach from the base 1. The pin hole 8 and the filling groove 19 are then filled with sealing ring 27 and sealing ring 20 dry glue for fixation, completing the insulation and protection assembly of the high-voltage ceramic capacitor body.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A novel insulation and protection structure for a high-voltage ceramic capacitor, characterized in that, include The base (1) is connected to a positioning seat (2), the positioning seat (2) is connected to a limiting gasket (3), the base (1) is sealed to an upper shell (4), the upper shell (4) is connected to a limiting seat (5), the limiting seat (5) is connected to a limiting gasket (6), the inner walls of the base (1) and the upper shell (4) are coated with an insulating layer (7), the upper shell (4) is provided with a pin hole (8), and the pin hole (8) is embedded with an insulating sleeve (9); A limiting lock post (10) is movably connected to the base (1). The upper shell (4) is connected to a lock block (11). The limiting lock post (10) is provided with a lock groove (12). The lock block (11) is inserted into the lock groove (12). Control block (13), the control block (13) is movably connected to the upper shell (4), the upper shell (4) is provided with a limit rod (14), the limit rod (14) is rotatably connected through the control block (13), and the limit rod (14) is movably connected to the limit lock pin (10); The heat dissipation structure has a vent hole (15) at the bottom of the base (1), and the heat dissipation structure is connected to the vent hole (15).

2. The novel insulation and protection structure for a high-voltage ceramic capacitor according to claim 1, characterized in that, The end face of the base (1) is provided with a mating groove (16), and the end face of the upper shell (4) is connected with a convex rib (17). The convex rib (17) is inserted into the mating groove (16). The base (1) is connected with a baffle ring (18). The gap between the baffle ring (18) and the convex rib (17) is set as a filling groove (19). The filling groove (19) is filled with a sealing rubber ring (20).

3. The novel insulation and protection structure for a high-voltage ceramic capacitor according to claim 1, characterized in that, The base (1) is provided with a guide post (21), one end of the guide post (21) is connected to the inner wall of the base (1), the other end of the guide post (21) is connected to a limiting piece (22), the guide post (21) is sleeved with a spring (23), the limiting locking post (10) is provided with a guide hole (24), the guide post (21) is inserted into the guide hole (24), one end of the spring (23) is connected to the inner wall of the base (1), and the other end of the spring (23) abuts against the limiting locking post (10).

4. The novel insulation and protection structure for a high-voltage ceramic capacitor according to claim 3, characterized in that, The upper shell (4) is provided with a guide sliding hole (25), the control block (13) is provided with a slider (26), the slider (26) is movably connected to the guide sliding hole (25), one end of the slider (26) is connected to the control block (13), the other end of the slider (26) is connected to a connecting plate (27), the connecting plate (27) is connected to a connecting post (28), the upper shell (4) is connected to a rotating rod (29), one end of the limiting rod (14) is provided with a rotating hole (30), the rotating rod (29) is inserted into the rotating hole (30), the limiting rod (14) is provided with a control sliding hole (31), and the connecting post (28) is slidably connected to the control sliding hole (31).

5. The novel insulation and protection structure for a high-voltage ceramic capacitor according to claim 4, characterized in that, The connecting plate (27) is connected to a buckle (32), the upper shell (4) is connected to a post (33), the post (33) is inserted into a buckle (34), the buckle (34) is provided with a slot (35), and the buckle (32) is engaged with the slot (35).

6. The novel insulation and protection structure for a high-voltage ceramic capacitor according to claim 4, characterized in that, The upper shell (4) is connected to a first stop block (36), and the connecting plate (27) is connected to a second stop block (37). The first stop block (36) and the second stop block (37) are arranged opposite to each other.

7. The novel insulation and protection structure for a high-voltage ceramic capacitor according to claim 1, characterized in that, The heat dissipation structure includes a waterproof and breathable membrane (38) and a heat dissipation bracket (39). The waterproof and breathable membrane (38) is connected to the vent (15). The positioning seat (2) is provided with an installation hole (40). The heat dissipation bracket (39) is connected to the installation hole (40). The heat dissipation bracket (39) is provided with a heat dissipation channel (41). The heat dissipation channel (41) is connected to the vent (15).

8. The novel insulation and protection structure for a high-voltage ceramic capacitor according to claim 1, characterized in that, The positioning seat (2) is provided with a positioning groove (42), the limiting seat (5) is provided with a limiting groove (43), the positioning groove (42) and the limiting groove (43) are arranged opposite to each other, the limiting seat (5) is connected to a support plate (44), the support plate (44) is provided with a pin through hole (45), and the pin through hole (45) is connected to a heat shrink sleeve (46).

9. The novel insulation and protection structure for a high-voltage ceramic capacitor according to claim 1, characterized in that, The cross-sectional shape of the pin hole (8) is stepped, and a sealing ring (47) is filled between the hole wall of the pin hole (8) and the outer surface of the insulating sleeve (9).

10. The novel insulation and protection structure for a high-voltage ceramic capacitor according to claim 1, characterized in that, The limiting pad 2 (6) is provided with a fixing groove (48), and a pressure equalizing ring (49) is embedded in the fixing groove (48). The pressure equalizing ring (49) is made of semi-conductive silicone rubber.

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