Extra-high voltage high-grade suspension type porcelain insulator iron cap
By designing annular protrusions, serrated ridges, and grooves on the iron cap of suspension porcelain insulators, the problems of non-universal clamps and cumbersome gluing were solved, realizing clamp universality and automated gluing, and improving the stability and mechanical strength of the insulators.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-08
- Publication Date
- 2026-03-27
AI Technical Summary
In existing technologies, insulator clamps are difficult to use universally, the gluing process is cumbersome and inefficient, and the stress concentration in the iron cap design leads to poor insulator stability.
A high-grade suspension porcelain insulator cap for ultra-high voltage is designed, with annular protrusions on the outer wall, serrated ridges on the inner wall, and grooves at the cap opening. This design enables universal clamping and automated gluing, and the serrated ridges disperse stress.
It improves the versatility of clamps and the efficiency of gluing, avoids adhesive overflow, and enhances the mechanical strength and stability of insulators.
Smart Images
Figure CN224052932U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to power transmission and distribution equipment technical field especially relates to a kind of extra-high voltage high-grade suspension porcelain insulator iron cap. BACKGROUND
[0002] Power system is one of the cornerstone of modern social infrastructure, and its stable operation ensures the normal production and life, porcelain insulator is a common electrical accessory in power equipment, which plays an important role in supporting, fixing and insulation, and iron cap is an important component of suspension porcelain insulator, which is used to connect other components in insulator string, such as steel foot.
[0003] With long-term operation, environmental erosion and external force, the aging and damage of insulator string become an inevitable problem, therefore, it is necessary to regularly maintain and replace the insulator, and the clamp can be used to replace any insulator in porcelain insulator string, the insulator clamp of the prior art respectively abuts against the upper and lower sections of the iron cap ring, and the size of the clamp must be accurately matched with the surface shape of the insulator iron cap, since there are differences in size and shape of the insulator iron cap of the same grade produced by different manufacturers, which makes the insulator clamp of the line maintenance department difficult to be universal, and in the process of maintenance operation, a lot of time is often wasted because it is difficult to find a matching clamp, which seriously hinders the smooth progress of maintenance operation and slows down the overall operation progress, therefore, there is an urgent need for an innovative solution to make the clamp universal.
[0004] In addition, the current gluing process of suspension porcelain insulator also faces many challenges, and the common problems include lagging production process, low automation level and low production efficiency, especially the gluing process of iron cap and porcelain piece, which still relies on manual operation, when the cement adhesive is used to glue the iron cap and porcelain piece, excess adhesive will overflow from the iron cap mouth, in order to clean these overflowed adhesive, workers have to perform tedious manual operation, which undoubtedly further slows down the production efficiency, more seriously, if the overflowed adhesive cannot be completely removed, it may threaten the electrical performance of the insulator, and these unremoved adhesive may form surface defects, which will attract moisture, dust and other pollutants, resulting in a decrease in surface insulation resistance and an increase in the risk of flashover, breakdown and corona, at the same time, under extreme temperature conditions, the overflowed adhesive may also expand or shrink, which will adversely affect the material performance of the insulator.
[0005] In the design of the previous iron cap structure, the proximal portion of the inner wall of the iron cap usually adopts a smooth circular surface, which is glued with the porcelain piece by cement adhesive, however, in actual application, the stress bearing surface of this design is too small, and the side wall of the porcelain piece is prone to stress concentration during the tension process of the product, which results in poor stability of the overall insulator, therefore, it is particularly important to improve this design defect to improve the overall performance of the insulator. Utility model content
[0006] The utility model discloses a kind of UHV high-grade suspension porcelain insulator iron caps to solve the shortcomings in prior art, such as: it is difficult to find the fixture of adaptation;Excessive cementing agent can also swell or shrink, and the material performance of insulator is adversely affected;Porous side wall is prone to stress concentration during product tension, leading to the stability of insulator whole is poor, and the UHV high-grade suspension porcelain insulator iron cap is presented.
[0007] In order to achieve the above object, the utility model adopts the following technical scheme:
[0008] A kind of UHV high-grade suspension porcelain insulator iron cap, comprising:
[0009] Iron cap, the outer wall of the iron cap has a ring-shaped protrusion fixedly installed, the hat mouth of the iron cap is provided with a groove, and the inner wall of the iron cap is fixedly installed with two sawtooth-shaped protrusions one and two.
[0010] Preferably, the ring-shaped protrusion is integrally formed on the iron cap by casting molten iron using a mold and a sand core, and a fixture is sleeved on the ring-shaped protrusion, and the size of the ring-shaped protrusion matches the fixture.
[0011] Preferably, the inner side of the iron cap is installed with a porcelain piece, the iron cap and the porcelain piece are glued by cementing agent, and the cementing agent is located in the groove.
[0012] Preferably, the stress bearing surface of the iron cap is composed of the sawtooth-shaped protrusion one and the sawtooth-shaped protrusion two, to ensure that the porcelain insulating piece side wall will not produce stress concentration during product tension.
[0013] Preferably, the volume of the groove is determined by the size of the inner cavity of the iron cap and the head of the porcelain piece.
[0014] Compared with the prior art, the utility model has the beneficial effects that:
[0015] 1. A ring-shaped protrusion on the outer wall of the iron cap is closely combined with the main body of the iron cap, forming a stable overall structure. For iron caps of different manufacturers, different models and sizes, if the size of the ring-shaped protrusion can remain consistent, a universal fixture can be designed to solve the problem of the fixture not being universal in the prior art.
[0016] 2. The groove at the hat mouth of the iron cap can accommodate excess cementing agent. By controlling the volume of the groove and the amount of cementing agent added, the problem of cementing agent overflowing from the hat mouth of the iron cap and being difficult to clean can be solved, intelligent production can be realized, and the gluing efficiency can be improved.
[0017] 3. The inner wall of the iron cap is provided with two sawtooth-shaped protrusions, which increase the stress surface during the product tension process, better disperse the porcelain wall stress, make the stress more uniform, improve the overall performance and long-term performance of the suspension porcelain insulator;
[0018] In summary, the design features and advantages of the utility model jointly act on the iron cap of the extra-high voltage high-grade suspension porcelain insulator, solve the problem of non-universal insulator fixture, optimize the glue mounting process, enhance the mechanical strength of the porcelain insulator, and improve the overall performance of the porcelain insulator, so that the utility model has wide application prospect and popularization value in the electric power industry. BRIEF DESCRIPTION OF DRAWINGS
[0019] Fig. 1 A structure schematic view of an extra-high voltage high-grade suspension porcelain insulator iron cap is provided in the utility model;
[0020] Fig. 2 A sectional structure schematic view of an extra-high voltage high-grade suspension porcelain insulator iron cap is provided in the utility model.
[0021] In the figure: 1 annular protrusion, 2 groove, 3 sawtooth-shaped protrusion one, 4 sawtooth-shaped protrusion two, 5 iron cap, 6 porcelain piece, 7 cement adhesive. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.
[0023] Referring to Figs. 1-2 An extra-high voltage high-grade suspension porcelain insulator iron cap comprises:
[0024] The iron cap 5 is fixedly installed with an annular protrusion 1 on the outer side wall, the iron cap 5 is provided with a groove 2 at the cap opening, and the inner wall of the iron cap 5 is fixedly installed with two sawtooth-shaped protrusions one 3 and two sawtooth-shaped protrusions two 4;
[0025] The annular protrusion 1 is integrally formed on the iron cap 5 by die and sand core through pouring molten iron, and the annular protrusion 1 is sleeved with a fixture, the size of the annular protrusion 1 is matched with the fixture, and the fixture is a device for replacing the porcelain insulator, so as to ensure the universality of the fixture for replacing the same grade extra-high voltage product produced by different manufacturers;
[0026] The clamps for the insulators are secured to the upper and lower ends of the annular protrusions 1 on the two insulators, which can restrict the axial movement of the insulator caps 5 inside them and achieve a stable fixing effect. If the size of the annular protrusions 1 can be standardized for caps 5 of different manufacturers, models and sizes, then by developing a standardized clamp, the problem of clamp incompatibility in the current technology can be solved, which greatly improves the versatility and practicality of the clamps. The annular protrusions 1 and caps 5 are formed by integral casting. After demolding, the edges of the annular protrusions 1 are rounded and chamfered, and then the surface is galvanized to achieve corrosion protection, ensuring that the protrusion outline is smooth and convenient for the clamps to be inserted and removed when the suspension porcelain insulator is replaced online.
[0027] A ceramic piece 6 is installed on the inside of the iron cap 5. The iron cap 5 and the ceramic piece 6 are glued together by cement adhesive 7, and the cement adhesive 7 is located in the groove 2, so that the adhesive can be applied precisely.
[0028] The stress-bearing surface of the iron cap 5 is composed of serrated ridge 1 3 and serrated ridge 2 4, which ensures that no stress concentration will occur on the side wall of the ceramic insulator during the tensile process of the product.
[0029] Near the cap opening, on the inner wall of the iron cap 5, there are two serrated protrusions, namely 3 and 4. These two together form the stress-bearing surface of the iron cap 5. The serrated protrusions 3 and 4 are also integrally cast. By increasing the area of the stress-bearing surface, the stress distribution on the porcelain wall when the product is under tension is more uniform, effectively reducing the risk of stress concentration. This design not only significantly improves the stability and reliability of the entire porcelain insulator, but also further optimizes the overall mechanical strength of the porcelain insulator and improves the long-term performance of the suspension porcelain insulator.
[0030] The volume of groove 2 is determined by the dimensions of the inner cavity of iron cap 5 and the head of ceramic piece 6;
[0031] When the inner cavity dimension of the iron cap 5 uses the upper limit of its tolerance range (positive tolerance) and the head dimension of the ceramic part 6 uses the lower limit of its tolerance range (negative tolerance), the required amount of cement adhesive 7 reaches its maximum, and the volume is set to V1 at this time. Conversely, when the inner cavity dimension of the iron cap 5 uses a negative tolerance and the head dimension of the ceramic part 6 uses a positive tolerance, the required amount of cement adhesive 7 is minimum, and the volume is set to V2 at this time. The volume of the groove 2 is set to V = V1 - V2. During automatic gluing, the amount of cement adhesive 7 is controlled to be the amount that the volume V1 can hold. Fig. 2For reference, the partial enlarged view of the groove 2 can be clearly seen that the groove 2 has the space for accommodating the excess cement adhesive 7, in actual operation, two extreme situations will occur: the inner cavity size of the iron cap 5 is just positive difference, the head size of the porcelain piece 6 is just negative difference, at this time, the groove 2 is without cement adhesive 7; the inner cavity size of the iron cap 5 is just negative difference, the head size of the porcelain piece 6 is just positive difference, at this time, the groove 2 is filled with cement adhesive 7, these two results can effectively avoid the overflow of the cement adhesive 7, in this way, as long as the volume of the groove 2 and the amount of the cement adhesive 7 are accurately controlled, the overflow of the cement adhesive 7 in the gluing process can be avoided, the subsequent difficult cleaning problem is avoided, and finally the automatic gluing is realized.
[0032] In the utility model, the cement adhesive 7 is applied to the groove of the iron cap 5, so that the iron cap 5 and the porcelain piece 6 are fixed and glued together, when the inner cavity size of the iron cap 5 adopts the upper limit value (positive difference) of its tolerance range and the head size of the porcelain piece 6 adopts the lower limit value (negative difference) of its tolerance range, the amount of the required cement adhesive 7 reaches the maximum, at this time, the volume is set as V1; on the contrary, when the inner cavity size of the iron cap 5 adopts negative difference and the head size of the porcelain piece 6 adopts positive difference, the amount of the required cement adhesive 7 is the minimum, at this time, the volume is set as V2, the volume V of the groove 2 is set as V1-V2, the amount of the cement adhesive 7 is controlled as the amount that can be accommodated by the volume V1 when automatic gluing, so that the overflow of the cement adhesive 7 is avoided, the subsequent difficult cleaning problem is avoided, and finally the automatic gluing is realized. Fig. 2 For reference, the partial enlarged view of the groove 2 can be clearly seen that the groove 2 has the space for accommodating the excess cement adhesive 7, in actual operation, two extreme situations will occur: the inner cavity size of the iron cap 5 is just positive difference, the head size of the porcelain piece 6 is just negative difference, at this time, the groove 2 is without cement adhesive 7; the inner cavity size of the iron cap 5 is just negative difference, the head size of the porcelain piece 6 is just positive difference, at this time, the groove 2 is filled with cement adhesive 7, these two results can effectively avoid the overflow of the cement adhesive 7, in this way, as long as the volume of the groove 2 and the amount of the cement adhesive 7 are accurately controlled, the overflow of the cement adhesive 7 in the gluing process can be avoided, the subsequent difficult cleaning problem is avoided, and finally the automatic gluing is realized.
[0033] The outer side wall of the iron cap 5 has a ring-shaped protrusion 1, the clamp of the insulator is clamped on the upper and lower ends of the ring-shaped protrusion 1 of the two insulators, the axial movement of the insulator iron cap 5 in the interior thereof can be limited, the stable fixing effect is realized, for the iron caps 5 of different manufacturers, different models and different sizes, if the size of the ring-shaped protrusion 1 can be unified as a standard, then by developing a set of standardized clamps, the problem that the clamps are not compatible in the current technology can be solved, the universality and practicality of the clamps are greatly improved, the ring-shaped protrusion 1 and the iron cap 5 are formed by integrated casting, after demolding is completed, the edge of the ring-shaped protrusion 1 is chamfered, then the surface is galvanized to realize corrosion prevention, the protrusion profile is ensured to be smooth, the clamp is conveniently sleeved and sleeved out when the suspension type porcelain insulator is replaced online;
[0034] The inner wall of the iron cap 5 has serrated protrusion one 3 and serrated protrusion two 4, which together constitute the stress bearing surface of the iron cap 5, and the serrated protrusion one 3 and the serrated protrusion two 4 are integrally cast and formed, by increasing the area of the stress bearing surface, the stress distribution acting on the porcelain wall is more uniform when the product is pulled, effectively reducing the risk of stress concentration, this design not only significantly improves the stability and reliability of the whole porcelain insulator, but also further optimizes the overall mechanical strength of the porcelain insulator, and improves the long-term use performance of the suspension porcelain insulator.
[0035] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.
Claims
1. An extra-high voltage high-class suspension porcelain insulator cap, comprising a cap (5), characterized in that, The outer wall of the iron cap (5) is fixedly installed with a ring-shaped protrusion (1), the cap mouth of the iron cap (5) is provided with a groove (2), and the inner wall of the iron cap (5) is fixedly installed with two sawtooth protrusions (3) and (4).
2. The extra-high voltage high-grade suspension porcelain insulator cap of claim 1, wherein, The ring-shaped protrusion (1) is integrally formed on the iron cap (5) by casting molten iron through a mold and a sand core, and a fixture is sleeved on the ring-shaped protrusion (1), and the size of the ring-shaped protrusion (1) is matched with the fixture.
3. The extra-high voltage high-grade suspension porcelain insulator cap of claim 1, wherein, The inner side of the iron cap (5) is installed with a porcelain piece (6), the iron cap (5) and the porcelain piece (6) are glued by cement adhesive (7), and the excess part of the cement adhesive (7) is stored in the groove (2).
4. The extra-high voltage high-grade suspension porcelain insulator cap of claim 1, wherein, The stress bearing surface of the iron cap (5) is composed of the sawtooth protrusion (3) and the sawtooth protrusion (4).
5. The extra-high voltage high-grade suspension porcelain insulator cap of claim 3, wherein, The volume of the groove (2) is determined by the size of the inner cavity of the iron cap (5) and the head of the porcelain piece (6). The volume of the groove (2) is determined by the size of the inner cavity of the iron cap (5) and the head of the porcelain piece (6).