Ceramic insulator for preventing sealant from aging

Abstract

The invention discloses a ceramic insulator capable of preventing sealant aging, and relates to the field of ceramic insulators, the ceramic insulator comprises a ceramic member and a vertical rod, the inner ring of the ceramic member is integrally provided with an upper connecting ring and a lower connecting ring, and the upper connecting ring and the lower connecting ring are arranged up and down; and the upper connecting ring and the lower connecting ring divide the interior of the porcelain piece into an upper gluing cavity, a middle gluing cavity and a lower gluing cavity which are sequentially distributed from top to bottom. The components of the cementing structure layer comprise the silicone rubber and the lubricating oil, and the lubricating oil is uniformly distributed in the cementing structure layer, so that on one hand, the silicone rubber can be prevented from being oxidized to shorten the service life, and the insulativity and heat insulation performance between the porcelain piece and the vertical rod can be correspondingly improved.

Description

Technical Field

[0001] The invention relates to the field of ceramic insulators, in particular to a ceramic insulator capable of preventing sealant from aging. Background Art

[0002] Ceramic insulators are divided into three structural types: external glue mounting, internal glue mounting and combined glue mounting. The internal glue mounting porcelain insulators are mounted by cement or silicone rubber, but the existing glue mounting has the following defects:

[0003] First: cement binding;

[0004] Porosity defects: There are dense pore defects in the cement bonding area. These pores may cause the insulator strength to decrease and easily break at the stress concentration point.

[0005] Interface cracking: Poor interface bonding process may lead to interface cracking, especially when the external temperature changes, the interface cracking will further develop and affect the overall strength of the insulator.

[0006] Moisture: Water molecules enter the porcelain body through the cracks in the glue, causing the porcelain body to heat up. The thermal effect inside the porcelain part induces the cracks to expand faster, resulting in a significant decrease in the strength of the insulator.

[0007] Second: Silicone rubber binding;

[0008] Mechanical performance issues: Silicone rubber-mounted porcelain insulators are prone to breakage during transportation and installation because silicone rubber is an elastic material that is easily deformed or damaged during transportation and installation.

[0009] Electrical performance issues: The electrical insulation strength of silicone rubber-mounted porcelain insulators will be significantly reduced under wet and dirty conditions, making them prone to flashovers caused by pollution, rain, and ice. In addition, the surface of silicone rubber easily absorbs moisture, causing its electrical performance to deteriorate.

[0010] High maintenance cost: Since silicone rubber-mounted porcelain insulators are not significantly different from normal insulators in appearance, tower inspection is required to determine whether they have failed, which increases operation and maintenance costs.

[0011] Aging problem: Silicone rubber materials will age during long-term use, resulting in a decrease in performance and requiring regular replacement and maintenance.

[0012] Therefore, there is a lack of a glue-mounting method that can both reduce the aging of the glue-mounting structure and increase the service life of the insulator. It is necessary for the present invention to propose a ceramic insulator that prevents the aging of the sealant to solve the above problem. Summary of the invention

[0013] The object of the present invention is to provide a ceramic insulator which can prevent sealant from aging, so as to solve the problem of a glue-mounting method which can both reduce the aging of glue-mounting structure and increase the service life of the insulator.

[0014] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A ceramic insulator for preventing sealant from aging, comprising a ceramic part and a vertical pole, wherein an upper connecting ring and a lower connecting ring are integrally arranged at the inner ring of the ceramic part, the upper connecting ring and the lower connecting ring are arranged up and down, and the upper connecting ring and the lower connecting ring divide the interior of the ceramic part into an upper glue-filling cavity, a middle glue-filling cavity and a lower glue-filling cavity which are sequentially distributed from top to bottom;

[0015] The upper glue cavity and the lower glue cavity are both filled with a concrete layer, and the middle glue cavity is filled with a glue structure layer;

[0016] Wherein, the concrete layer is made of concrete material, and the adhesive structure layer is a mixture of silicone rubber and lubricating oil.

[0017] Preferably, the vertical rod is a hollow rod body, and both the inner wall and the outer wall of the hollow rod body are provided with threads.

[0018] Preferably, a hard rubber ring is fixedly provided at the inner ring of the upper connecting ring and the lower connecting ring, the inner ring of the hard rubber ring has a thread, and the vertical rod is connected to the hard rubber ring through a threaded structure.

[0019] Preferably, the adhesive structure layer is filled into the middle adhesive cavity by low-pressure injection.

[0020] Preferably, an intermediate baffle is integrally provided at the middle position inside the vertical pole, and the thickness of the intermediate baffle is lower than the wall thickness of the vertical pole;

[0021] The upper end of the vertical rod is inside a first chamber, and the lower end of the vertical rod is inside a second chamber. The first chamber is provided with a plurality of injection holes penetrating the outer circle of the vertical rod;

[0022] The adhesive structure layer is injected into the middle adhesive cavity at low pressure after passing through the first chamber and the injection hole in sequence.

[0023] Preferably, the thickness of the middle baffle gradually increases from the center position to the outer circle thereof.

[0024] Preferably, when the adhesive structure layer is injected into the middle adhesive cavity under low pressure, it is used in conjunction with a threaded rod. The threaded rod includes a cylindrical rod body. An external thread structure is provided on the outer circle of the threaded rod. A moving hole is provided inside the threaded rod. The moving hole penetrates through the upper and lower ends of the threaded rod at the same time. A push rod is slidably arranged in the moving hole. The upper and lower ends of the push rod penetrate through the upper and lower ends of the moving hole respectively. A pressure piece is fixedly arranged at the upper end of the push rod. The diameter of the pressure piece is larger than that of the push rod. A spring is fixedly arranged on the lower surface of the pressure piece. The spring is movably sleeved on the outer circle of the push rod. The lower end of the spring is fixedly connected to the upper end surface of the threaded rod.

[0025] Preferably, scale lines are arranged along the height direction of the push rod on the outer circle of the lower end of the push rod.

[0026] Preferably, the length of the threaded rod is greater than the length of the vertical rod.

[0027] Preferably, the pressure piece is movably attached to the lower surface of the middle baffle.

[0028] The technical effects and advantages of the present invention:

[0029] 1. In the present invention, the composition of the adhesive structure layer includes silicone rubber and lubricating oil. The lubricating oil is evenly distributed in the adhesive structure layer. On the one hand, it can prevent the oxidation of silicone rubber and reduce the service life. It can also correspondingly increase the insulation and heat insulation performance between the porcelain part and the vertical rod.

[0030] 2. In the present invention, because the lubricating oil is evenly distributed in the adhesive structure layer, but the total amount is not much, it can still ensure that the adhesive structure layer has a sufficient coefficient of thermal expansion. When the porcelain part or the vertical rod is overheated, the adhesive structure layer can expand or contract to a certain extent. Although the expansion amount of the adhesive structure layer is very small when it is restricted between the porcelain part and the vertical rod, it can also consume a part of the heat, reduce the heat on the porcelain part and the vertical rod, and prevent the porcelain part and the vertical rod from expanding and cracking due to overheating, achieving the purpose of crack prevention.

[0031] 3. In the present invention, concrete layers are also filled in the upper adhesive cavity and the lower adhesive cavity to seal the two ends of the adhesive structure layer, further avoiding the aging problem caused by the contact of the adhesive structure layer with air. Due to the setting of the adhesive structure layer, it can better adapt to thermal expansion and contraction, taking into account the stability and service life of the adhesive structure.

[0032] 4. In the present invention, when the porcelain part is damaged, the outer structure of the vertical rod can be directly broken to smoothly recycle the vertical rod, saving the use cost; the hard rubber ring avoids the problems of wear caused by the thread on the outer circle of the vertical rod or damage to the inner wall structure of the porcelain part.

[0033] 5. In the present invention, the cementing structure layer is filled in the middle cementing cavity by means of low-pressure injection, which can make the cementing structure layer maintain a tight structure and improve the connection strength of the cementing structure layer.

[0034] 6. In the present invention, the setting of the threaded rod not only facilitates the injection of the mixture in a manner of setting a fixed pressure, but also can avoid the leakage of the mixture, facilitate the application of the concrete layer, prevent the excess concrete layer from entering the vertical rod, and has a low cost, which is suitable for popularization. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Schematic diagram of the ceramic insulator structure for preventing sealant aging according to the present invention.

[0036] Figure 2 Schematic diagram of the component to be sealed of the ceramic insulator for preventing sealant aging according to the present invention.

[0037] Figure 3 Cross-sectional view of the component to be sealed of the ceramic insulator for preventing sealant aging according to the present invention.

[0038] Figure 4 For the present invention Figure 3 Schematic diagram of the enlarged structure at A in

[0039] Figure 5 Schematic diagram of the ceramic insulator for preventing sealant aging according to the present invention when used in cooperation with a threaded rod.

[0040] Figure 6 Cross-sectional view of the ceramic insulator for preventing sealant aging according to the present invention when used in cooperation with a threaded rod.

[0041] Figure 7 For the present invention Figure 6 Schematic diagram of the structure at B in

[0042] Figure 8 Schematic diagram of the component to be sealed when injecting the cementing structure layer according to the present invention.

[0043] Figure 9 Schematic diagram of the structure when the middle baffle is broken when injecting the cementing structure layer into the component to be sealed according to the present invention.

[0044] Figure 10 For the present invention Figure 9 Schematic diagram of the enlarged structure at C in

[0045] Figure 11 Schematic diagram of the component to be sealed before preparing to inject the concrete layer according to the present invention.

[0046] Figure 12 For the present invention Figure 11 Schematic diagram of the enlarged structure at D in

[0047] Figure 13 Cross-sectional view of a ceramic insulator for preventing sealant aging according to the present invention.

[0048] In the figure: 1, porcelain part; 101, upper connecting ring; 102, lower connecting ring; 1011, funnel surface; 2, vertical rod; 201, middle baffle; 202, first chamber; 203, second chamber; 204, injection hole; 3, concrete layer; 4, upper potting cavity; 5, middle potting cavity; 6, lower potting cavity; 7, hard rubber ring; 8, threaded rod; 81, push rod; 801, moving hole; 82, pressure plate; 83, spring; 9, potting structure layer. Detailed implementation manners

[0049] The present invention provides a ceramic insulator for preventing sealant aging as Figures 1-13 shown, which includes two main parts: a component to be sealed and a potting structure.

[0050] Referring to Figure 2 and Figure 3 shown, the component to be sealed includes a porcelain part 1 and a vertical rod 2. The porcelain part 1 is the porcelain part of the insulator body, and the outer surface of the porcelain part 1 has a protruding petticoat structure. The vertical rod 2 is a hollow rod body, and threads are provided on both the inner wall and the outer wall of the hollow rod body.

[0051] In the present invention, improvements are mainly made to the porcelain part 1 and the potting structure. Specifically, an upper connecting ring 101 and a lower connecting ring 102 are integrally provided at the inner ring of the porcelain part 1. The upper connecting ring 101 and the lower connecting ring 102 are arranged up and down, and the upper connecting ring 101 and the lower connecting ring 102 divide the interior of the porcelain part 1 into an upper potting cavity 4, a middle potting cavity 5, and a lower potting cavity 6 that are distributed in sequence from top to bottom;

[0052] Referring to Figure 12 shown, the potting structure includes a concrete layer 3 and a potting structure layer 9. The potting structure layer 9 is filled in the middle potting cavity 5, and the concrete layer 3 is filled in the upper potting cavity 4 and the lower potting cavity 6, so that the porcelain part 1 and the vertical rod 2 are stably connected.

[0053] Among them, the component of the potting structure layer 9 includes silicone rubber and lubricating oil. When manufacturing the potting structure layer 9, first, the molten silicone rubber and the lubricating oil are mixed evenly and stirred to form a mixture, and then the mixture is injected into the middle potting cavity 5 to form the potting structure layer 9; because the lubricating oil is evenly distributed in the potting structure layer 9, on the one hand, it can prevent the oxidation of the silicone rubber and reduce the service life, and can also correspondingly increase the insulation and heat insulation performance between the porcelain part 1 and the vertical rod 2.

[0054] Furthermore, since the lubricating oil is evenly distributed in the cementing structure layer 9 but the total amount is not much, it can still ensure that the cementing structure layer 9 has a sufficient coefficient of thermal expansion. When the porcelain part 1 or the vertical pole 2 is overheated, the cementing structure layer 9 can expand or contract to a certain extent. Although the expansion amount of the cementing structure layer 9 is very small when it is restricted between the porcelain part 1 and the vertical pole 2, it can also consume a part of the heat, reduce the heat on the porcelain part 1 and the vertical pole 2, and prevent the porcelain part 1 and the vertical pole 2 from expanding and cracking due to overheating, achieving the purpose of crack prevention.

[0055] In the present invention, mixing silicone rubber with lubricating oil to make the cementing structure layer 9 is a new direction in the art, which can prevent the cementing structure layer 9 from aging.

[0056] Moreover, in the present invention, a concrete layer 3 is further filled in the upper cementing cavity 4 and the lower cementing cavity 6 to seal both ends of the cementing structure layer 9, further avoiding the aging problem caused by the contact of the cementing structure layer 9 with air. Due to the arrangement of the concrete layer 3, the upper connecting ring 101 and the lower connecting ring 102, the porcelain part 1 and the vertical pole 2 are stably connected. Due to the arrangement of the cementing structure layer 9, it can better adapt to thermal expansion and contraction, taking into account the stability and service life of the cementing structure.

[0057] Correspondingly, the cementing structure layer 9 can also be formed by mixing any one or more of acrylate adhesives, polyurethane adhesives and hot-melt adhesives with lubricating oil.

[0058] It should be noted that the upper surface of the upper connecting ring 101 has a funnel surface 1011, and the funnel surface 1011 can facilitate the smooth screwing of the vertical pole 2 into the upper connecting ring 101.

[0059] Reference Figure 3 As shown in , considering that when the ceramic insulator is damaged, usually the porcelain part 1 is broken while the vertical pole 2 has a longer service life, in order to save costs, hard rubber rings 7 are fixedly arranged at the inner circles of the upper connecting ring 101 and the lower connecting ring 102. The inner circle of the hard rubber ring 7 has threads, and the vertical pole 2 can be connected to the hard rubber ring 7 through a threaded structure, realizing the assembly of the porcelain part 1 and the vertical pole 2. When the porcelain part 1 is damaged, the external structure of the vertical pole 2 can be directly broken to smoothly recycle the vertical pole 2, saving the use cost; the hard rubber ring 7 avoids the problems of wear caused by the threads on the outer circle of the vertical pole 2 or damage to the inner wall structure of the porcelain part 1.

[0060] For reference Figure 12 In the present invention, the concrete layer 3 is directly filled in the upper cementing cavity 4 and the lower cementing cavity 6 and leveled later, so that the end face of the porcelain part 1 is kept flat. The cementing structure layer 9 is filled in the middle cementing cavity 5 by a low-pressure injection method, which can make the cementing structure layer 9 maintain a tight structure and improve the connection strength of the cementing structure layer 9.

[0061] Reference Figure 3 and Figure 4 As shown in, the hole in the middle of the vertical rod 2 is formed by drilling holes at both ends of the solid rod. During specific processing, an intermediate retaining piece 201 thinner than the wall thickness of the vertical rod 2 is left at the middle position inside the vertical rod 2. Taking the intermediate retaining piece 201 as the boundary, the upper and lower cavities inside the vertical rod 2 are respectively called the first chamber 202 and the second chamber 203. Then, injection holes 204 are opened on the outer circle of the vertical rod 2. A number of injection holes 204 are provided, and the number of injection holes 204 are distributed at equal angles along the axis of the vertical rod 2. The injection holes 204 are located above the intermediate retaining piece 201 and communicate with the inside of the first chamber 202; when injecting the mixture into the middle bonding cavity 5, a pressure injection mechanism is connected to the upper end of the vertical rod 2, such as a low-pressure injection molding machine, etc. The mixture is injected into the vertical rod 2 at low pressure by using the pressure injection mechanism. The mixture passes through the first chamber 202 and the injection holes 204 in sequence and then fills the middle bonding cavity 5. The low-pressure injection method can make the mixture in the middle bonding cavity 5 more compact.

[0062] Reference Figures 5-10 As shown in, it is worth mentioning that a threaded rod 8 is also provided in the present invention. The threaded rod 8 is used in combination with the low-pressure injection process to ensure the structural tightness of the bonding structure layer 9; the threaded rod 8 is a cylindrical rod body. An external thread structure is provided on the outer circle of the threaded rod 8. The length of the threaded rod 8 is greater than the length of the vertical rod 2. A moving hole 801 is provided inside the threaded rod 8. The moving hole 801 penetrates through the upper and lower ends of the threaded rod 8 at the same time. A push rod 81 is slidably arranged in the moving hole 801. The upper and lower ends of the push rod 81 respectively penetrate through the upper and lower ends of the moving hole 801. A pressure piece 82 is fixedly arranged at the upper end of the push rod 81. The diameter of the pressure piece 82 is greater than the diameter of the push rod 81. A spring 83 is fixedly arranged on the lower surface of the pressure piece 82. The spring 83 is movably sleeved on the outer circle of the push rod 81. The lower end of the spring 83 is fixedly connected to the upper end surface of the threaded rod 8. Scale lines are arranged on the outer circle of the lower end of the push rod 81 along the height direction of the push rod 81;

[0063] When injecting the mixture into the inner part of the middle gluing cavity 5 at low pressure, first rotate and screw the threaded rod 8 into the vertical rod 2 so that the upper surface of the pressure piece 82 naturally fits against the lower surface of the middle baffle 201. Then, inject the mixture into the inner part of the middle gluing cavity 5 at low pressure. When the mixture injected into the middle gluing cavity 5 at low pressure reaches a certain pressure, it will break through the middle baffle 201. When the middle baffle 201 is broken through, the pressure piece 82 moves downward under the action of the pressure. While the pressure piece 82 moves downward, the push rod 81 slides downward. By observing the change of the scale line at the outer circle of the lower end of the push rod 81, it can be known that the mixture in the middle gluing cavity 5 reaches a certain pressure value. At this time, the injection of the mixture into the inner part of the middle gluing cavity 5 can be stopped. At this time, continue to screw the threaded rod 8 into the vertical rod 2. The threaded rod 8 can be used to open and seal the middle baffle 201 at the injection hole 204, and the excess mixture in the vertical rod 2 can be pushed out. When the threaded rod 8 is completely screwed into the vertical rod 2, apply the concrete layer 3 to the upper gluing cavity 4 and the lower gluing cavity 6. Due to the sealing of the vertical rod 2 by the threaded rod 8, it also prevents the concrete layer 3 from entering the vertical rod 2, which is convenient and efficient for leveling the concrete layer 3. After the concrete layer 3 and the gluing structure layer 9 solidify, then screw out the threaded rod 8 to form a ceramic insulator that prevents the sealant from aging; and the middle baffle 201 also fits against the inner wall of the vertical rod 2 to form a structure that seals the injection hole 204 in real time.

[0064] In summary, in the present invention, the setting of the threaded rod 8 is used, which not only facilitates the injection of the mixture in a way of setting a fixed pressure, but also can prevent the mixture from leaking, is convenient for applying the concrete layer 3, prevents the excess concrete layer 3 from entering the vertical rod 2, and has a low cost and is suitable for popularization. Preferably in the present invention, the thickness at the center position of the middle baffle 201 gradually becomes thicker towards its outer circle, which is convenient for the middle baffle 201 to be broken through from the middle; it can be adjusted according to the processing technology and has little impact.

Claims

1. A ceramic insulator for preventing sealant from aging, comprising a ceramic part (1) and a vertical rod (2), characterized in that: An upper connecting ring (101) and a lower connecting ring (102) are integrally provided at the inner ring of the porcelain piece (1), the upper connecting ring (101) and the lower connecting ring (102) are arranged up and down, and the upper connecting ring (101) and the lower connecting ring (102) divide the interior of the porcelain piece (1) into an upper glue cavity (4), a middle glue cavity (5) and a lower glue cavity (6) which are sequentially distributed from top to bottom; The upper glue cavity (4) and the lower glue cavity (6) are both filled with a concrete layer (3), and the middle glue cavity (5) is filled with a glue structure layer (9); The concrete layer (3) is made of concrete material, and the adhesive structure layer (9) is a mixed material of silicone rubber and lubricating oil.

2. A ceramic insulator for preventing sealant from aging according to claim 1, characterized in that: The vertical rod (2) is a hollow rod body, and both the inner wall and the outer wall of the hollow rod body are provided with threads.

3. A ceramic insulator for preventing sealant from aging according to claim 2, characterized in that: A hard rubber ring (7) is fixedly arranged at the inner ring of the upper connecting ring (101) and the lower connecting ring (102), the inner ring of the hard rubber ring (7) has a thread, and the vertical rod (2) is connected to the hard rubber ring (7) through a threaded structure.

4. A ceramic insulator for preventing sealant from aging according to claim 1, characterized in that: The adhesive structure layer (9) is filled into the middle adhesive cavity (5) by low-pressure injection.

5. A ceramic insulator for preventing sealant from aging according to claim 2, characterized in that: An intermediate baffle (201) is integrally provided at the middle position inside the vertical pole (2), and the thickness of the intermediate baffle (201) is lower than the wall thickness of the vertical pole (2); The interior of the upper end of the vertical rod (2) is a first chamber (202), and the interior of the lower end of the vertical rod (2) is a second chamber (203). The first chamber (202) is provided with a plurality of injection holes (204) penetrating the outer circle of the vertical rod (2); The adhesive structure layer (9) passes through the first chamber (202) and the injection hole (204) in sequence and is then injected into the middle adhesive cavity (5) at low pressure.

6. A ceramic insulator for preventing sealant from aging according to claim 5, characterized in that: The thickness of the middle baffle (201) at the center gradually increases towards its outer circle.

7. A ceramic insulator for preventing sealant from aging according to claim 6, characterized in that: The adhesive structure layer (9) is used in conjunction with the threaded rod (8) when it is injected into the middle adhesive cavity (5) at low pressure. The threaded rod (8) includes a cylindrical rod body. An external thread structure is arranged at the outer ring of the threaded rod (8). A movable hole (801) is arranged inside the threaded rod (8). The movable hole (801) simultaneously penetrates the upper and lower ends of the threaded rod (8). A push rod (81) is slidably arranged in the movable hole (801). The upper and lower ends of the push rod (81) respectively penetrate the upper and lower ends of the movable hole (801). A pressure plate (82) is fixedly arranged at the upper end of the push rod (81). The diameter of the pressure plate (82) is larger than the diameter of the push rod (81). A spring (83) is fixedly arranged on the lower surface of the pressure plate (82). The spring (83) is movably sleeved on the outer ring of the push rod (81). The lower end of the spring (83) is fixedly connected to the upper end surface of the threaded rod (8).

8. A ceramic insulator for preventing sealant from aging according to claim 7, characterized in that: The outer ring of the lower end of the push rod (81) is provided with scale lines distributed along the height direction of the push rod (81).

9. A ceramic insulator for preventing sealant from aging according to claim 7, characterized in that: The length of the threaded rod (8) is greater than the length of the vertical rod (2).

10. A ceramic insulator for preventing sealant from aging according to claim 7, characterized in that: The pressure sheet (82) is movably fitted on the lower surface of the middle baffle (201).

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