CN204966181U - Novel non -maintaining rigid suspension pin type porcelain composite insulator - Google Patents

Abstract

A new type of maintenance-free rigid suspended pin-type porcelain composite insulator, including upper metal parts, lower metal parts, ceramic parts glued together with the upper metal parts and lower metal parts, and silica gel for increasing the creepage distance sleeve, the silicone sleeve is sleeved on the partial outer surface of the upper metal piece or the partial outer surface of the porcelain piece by cold shrinkage, or is sleeved on the said silicone sleeve after glue-fitting by cold shrinkage. At the interface between the upper gold piece and the porcelain piece. Therefore, the utility model has the advantages of longer service life, lower cost, maintenance-free, and safer and more reliable in use.

Description

New maintenance-free rigid suspended pin type porcelain composite insulator

technical field

The utility model relates to the field of insulators, in particular to a novel maintenance-free rigid suspension needle type porcelain composite insulator type porcelain composite insulator.

Background technique

The insulator is a special insulation control used for the joint between the pole tower and the wire, and the connection between the substation frame and the line. Insulators are generally mainly composed of iron caps, tempered glass or ceramics, and steel feet, and the iron caps, tempered glass or ceramics, and steel feet are glued together by cement adhesive; among them, insulators are divided into porcelain insulators according to dielectric materials, Glass insulators, composite insulators, etc. However, outdoor insulators will be polluted by industrial pollution or natural saline, dust, etc. In dry conditions, the resistance of the dirty layer on the surface of the insulator is very large, which has little effect on the flashover voltage, but when the air humidity is high High, or under unfavorable weather conditions such as drizzle, fog, dew, snow, etc., the dirty layer on the surface of the insulator is wet, and its surface conductance increases sharply, which causes the leakage current of the insulator to increase sharply, and the flashover voltage of the insulator is greatly reduced. Flashover occurs under the environment; therefore, insulators with poor anti-pollution performance often cause accidents on overhead transmission lines.

The early porcelain insulators were simple in technology, and the pollution of porcelain insulators was very serious. In order to better prevent pollution and make the use process safer, people usually set sheds on porcelain insulators to block dust; , it is impossible to increase the creepage distance by adding double or triple umbrellas like porcelain insulators, and it can only be realized by adding several deep ribs under the shed, which will cause when used in areas with serious dust pollution, because the bell jar is deep The ribbed umbrella-shaped self-cleaning ability is poor, cleaning is inconvenient, and the lower surface is severely scaled, resulting in a greatly reduced pollution flashover resistance; with the progress of social development, composite insulators have become the mainstream of development, and composite insulators in China are all silicone rubber composite insulators. Light weight, high strength, strong anti-fouling flashover ability, most of them are used in medium and above polluted areas, in these areas, the creepage distance of silicone rubber insulators is 1/4 less than that of the other two materials, but it can reach The same anti-fouling effect; but composite insulators are made of composite materials, compared to inorganic components such as glass and porcelain, which are affected by some harsh environments, such as: voltage level, mechanical load requirements, installation locations, etc. Under different environments, aging, The phenomenon of damage is more prominent, and once the damage occurs, it can only be replaced completely, which wastes cost and maintenance cost.

In the prior art, in order to reduce the flashover phenomenon, in addition to increasing the anti-fouling performance of the insulator itself, people often clean the insulators by cleaning to restore the original insulation level. General areas are cleaned once a year, and polluted areas are cleaned once a year. It is cleaned twice a year (once before the fog season), and the general cleaning methods are as follows:

1. Power outage cleaning; power outage cleaning means that after the power outage of the line, the worker boards the pole and wipes it with a rag. If it is not clean, it can be wiped with a damp cloth or detergent. If it is still not clean, the insulator should be replaced or replaced. insulator.

2. Cleaning without power failure

Generally, an insulating rod equipped with a brush or tied with cotton yarn is used to wipe the insulator on the running line. The electrical performance and effective length of the insulating rods used, and the distance between people and live parts should comply with the regulations of the corresponding voltage level, and special personnel must be supervised during operation.

3. Rinse with charged water

There are two methods of large water flushing and small water flushing. The flushing water, the effective length of the operating rod, and the distance between people and live parts must meet the requirements of the industry regulations.

However, due to technical defects, in the prior art, the silicone rubber provided on the composite insulator is usually pasted. When exposed to wind and sun, the glue at the pasted place is very easy to age, which will make the umbrella The looseness between the skirt and the insulator may even cause the shed to fall off the insulator. Once it falls off, it needs to be replaced with a new insulator, which greatly increases the cost; and the above method of cleaning and removing dust is more difficult to implement. , especially for porcelain insulators that are commonly used and have poorer anti-fouling performance than traditional ones, it is difficult to clean, and it is very difficult to clean, and it requires a lot of manpower and material resources, which consumes high costs and the cleaning effect is very limited. In addition, power-off cleaning Also can affect power supply, has brought very big inconvenience to people's life.

Utility model content

In order to overcome the above problems, the utility model provides the society with a longer service life, lower cost and safer during use, a new type of maintenance-free rigid hanging pin type porcelain composite insulator type porcelain composite insulator.

The technical solution of the utility model is to provide a new type of maintenance-free rigid suspension pin-type porcelain composite insulator, including an upper metal part, a lower metal part, and a ceramic part glued together with the upper metal part and the lower metal part , and the silicone sleeve used to increase the creepage distance, the silicone sleeve is sleeved on the partial outer surface of the upper metal piece or the partial outer surface of the porcelain piece by cold shrinkage, or is sleeved on the partial outer surface of the porcelain piece by cold shrinkage It is located at the interface between the upper gold piece and the porcelain piece after glue-fitting.

As an improvement of the utility model, the diameter of the shed on the silicone sleeve is greater than the diameter of the shed on the porcelain piece.

As an improvement of the present utility model, the lower metal part includes a lower part and an upper part, the lower part is provided with a step that divides the lower part into a first part and a second part, and the upper part of the lower metal part is a rounded platform, so The diameter of the upper bottom surface circle of the rounding table is equal to the diameter of the second part of the lower metal part, and the lower metal part is provided with a screw hole.

As an improvement of the present invention, it also includes a protruding ring surrounding the outer periphery of the bottom of the lower metal piece.

As an improvement of the present invention, the included angle between the generatrix of the rounding table and the axis of the rounding table is greater than or equal to 10 degrees and less than or equal to 20 degrees.

As an improvement of the present invention, the height ratio between the first part, the second part and the upper part of the lower metal part is selected between 3.9:1.4:1.9 and 4.1:1.6:2.1.

As an improvement of the utility model, it also includes a metal piece, and the metal piece is vertically arranged on the step of the lower metal piece.

As an improvement of the utility model, rounded corners are set between the first part of the lower metal part and the second part of the lower metal part.

As an improvement of the utility model, a gasket is also included, and the gasket is arranged between the upper gold part and the top of the porcelain part and/or between the lower gold part and the porcelain part.

Since the utility model also includes a silicone sleeve for increasing the creepage distance, the silicone sleeve is sleeved on the local outer surface of the upper metal piece or the local outer surface of the porcelain piece by cold shrinkage, or is set by cold shrinkage. The method is sleeved at the interface between the upper metal part and the porcelain part after the glue is installed; the cold shrinking method can make the silicone sleeve and the partial outer surface of the upper metal part or the partial outer surface of the porcelain part, Or the interface between the upper metal part and the porcelain part after glue-fitting is more tightly bonded, and the silicone sleeve will not fall off due to thermal expansion and contraction, so that even if it is exposed to harsh environments, It can also make the silicone sleeve achieve an effective dust-proof effect, and has a longer service life and better dust-proof effect. At the same time, it does not require manual cleaning and maintenance, saving manpower and material resources, and it is very convenient to use. Therefore, the utility model has the advantages of longer service life, lower cost, maintenance-free, and safer and more reliable in use.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the first embodiment of the utility model.

Fig. 2 is a schematic cross-sectional structure diagram of the silicone sleeve in 1.

Fig. 3 is a schematic diagram of an axial sectional structure of the lower metal part in Fig. 1 .

Fig. 4 is a schematic diagram of the planar structure of Fig. 3

Fig. 5 is a schematic diagram of an axial sectional structure of a second embodiment of the present invention.

FIG. 6 is a schematic structural diagram of FIG. 5 after decomposition.

Fig. 7 is a schematic diagram of the axial sectional structure of the lower metal part in Fig. 5 .

Fig. 8 is a schematic diagram of an axial sectional structure of a third embodiment of the present invention.

detailed description

In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by "center", "upper", "lower", "front", "rear", "left", "right" etc. in terms is Based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot It should be understood as a limitation of the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance.

In the description of the present utility model, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a disassembly Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations. In addition, in the description of the present utility model, unless otherwise specified, the meanings of "plurality" and "several" are two or more.

Please refer to Figures 1 to 3. Figures 1 to 3 reveal the first implementation of a new type of maintenance-free rigid suspension pin porcelain composite insulator, a new type of maintenance-free rigid suspension pin type Porcelain composite insulator Porcelain composite insulator, including upper metal part 11, lower metal part 12, porcelain part 13 glued together with the upper metal part 11 and lower metal part 12, and silicone sleeve 17 for increasing the creepage distance (As shown in Figure 2), the silicone sleeve 17 is sleeved on the partial outer surface of the upper metal part 11 or the partial outer surface of the porcelain part 13, or the upper At the interface 130 between the gold piece 11 and the porcelain piece 13, in this embodiment, the silicone sleeve 17 is sleeved at the interface 130 between the upper gold piece 11 and the porcelain piece 13 after the glue-fitting is completed. In this way, on the one hand, the silicone sleeve 17 can increase the creepage distance on the surface of the insulator and reduce the creepage phenomenon; on the other hand, the silicone sleeve 17 can also block dust from the air, industrial pollution, natural saline, or Dust and other pollution to the insulator can achieve the purpose of maintenance-free, save manpower and material resources, and improve the anti-fouling flashover ability of the insulator at the same time, making the service life of the insulator longer and safer; in the utility model, through cold shrinkage The method can make the silicone sleeve 17 tightly attached to the partial outer surface of the upper metal part 11 or the partial outer surface of the porcelain part 13, or the upper metal part 11 regardless of whether it is a high temperature weather or a low temperature weather. At the interface 130 with the porcelain piece 13, the service life is longer, and it will not be separated due to the thermal expansion and contraction of the porcelain piece 13; besides, in addition, in the utility model, in order to further increase the creepage distance, the silica gel The diameter D1 of the shed 171 on the sleeve 17 is larger than the diameter D2 of the shed 131 on the porcelain part 13; The steps 1220 of the first part 1211 and the second part 1212, the upper part 122 of the lower metal part 12 is a rounded platform, the diameter of the upper bottom surface of the rounded platform is the same as the diameter of the second part 1212 of the lower metal part 12 are equal, the lower metal piece 12 is provided with a screw hole 124; in the utility model, the upper part of the upper metal piece 1 has a spherical curved square head 110, and the spherical curved surface square head 110 is used to fix the insulator In the utility model, the setting of the step 1220 can increase the amount of glue when the lower metal piece 12 and the porcelain piece 13 are glued together. , and the lower metal part 12 are glued together, the step 1220 divides the lower part 121 into a first part 1211 and a second part 1212 with unequal diameters, so that the lower metal part 12 and the porcelain part The glue between 13 is more firmly installed, so that it can have stronger bending resistance.

In the present utility model, in order to further make the bonding between the lower metal part 12 and the porcelain part 13 more firm, the included angle α between the busbar L of the rounding table and the axis I of the rounding table is greater than It is equal to 10 degrees and less than or equal to 20 degrees (as shown in FIG. 3 ), among which, 15 degrees is preferred.

In the utility model, in order to make the lower metal part 12 have better bending resistance, the height ratio between the first part 1211, the second part 1212 and the upper part 122 of the lower metal part 12 is 3.9:1.4: 1.9 and 4.1:1.6:2.1, wherein the height ratio between the first part 1211, the second part 1212 and the upper part 122 is preferably 4:1.5:2.

In the utility model, in order to prevent the lower metal part 12 from being too easy to rotate, a metal part 14 (as shown in Figure 4 ) is also included, and the metal part 14 is vertically arranged on the step 1220 of the lower metal part 12 In this way, when the lower metal part 12 and the porcelain part 13 are about to rotate relative to each other, the existence of the metal part 14 makes the lower gold part 12 have a resistance relative to the porcelain part 13, so that The lower metal part 12 can be prevented from rotating relative to the porcelain part 13, and the lower metal part 12 can be more firmly fixed to the porcelain part 13, making the utility model safer.

In the utility model, in order to further enhance the bending resistance of the utility model, the first part 1211 of the lower metal part 12 and the second part 1212 of the lower metal part 12 are provided with rounded corners, which has the advantage of preventing the The space between the first part 1211 of the lower metal part 12 and the second part 1212 of the lower metal part 12 is broken due to excessive force, which plays a role in enhancing the bending resistance.

In the utility model, a gasket 15 is also included, and the gasket 15 is arranged between the top of the upper metal part 11 and the porcelain part 13, or between the lower metal part 12 and the porcelain part 13 Of course, gaskets 15 can also be provided at the above two places at the same time. In the embodiment of the present utility model, gaskets 15 are provided at the above two places, and the gaskets 15 can make the metal fittings 11 and the top of the porcelain part 13, and between the lower metal part 12 and the porcelain part 13 will not be crushed due to excessive force, and play a buffering role.

The utility model can also be set as a second embodiment (please refer to Fig. 5 to Fig. 7), the second embodiment is substantially the same as the first embodiment, the difference is that it also includes the The protruding ring 125 on the outer periphery of the bottom 120 of the metal piece 12, the protruding ring 125 makes the utility model more convenient to install.

The utility model can also be set as a third embodiment (please refer to Fig. 8), the third embodiment is substantially the same as the second embodiment, the difference is that the fixing methods of the upper metal parts 11 are different, In this embodiment, the top of the upper metal piece 1 is a screw 111 , and the insulator is fixed by the screw 111 .

Claims (10)

1. a novel non-maintaining rigid suspended pin type porcelain composite insulator, comprise golden part (11), lower golden part (12), and with described golden part (11) and lower golden part (12) mucilage binding all-in-one-piece porcelain piece (13), it is characterized in that, also comprise the silica gel sheath (17) for increasing creep distance, described silica gel sheath (17) is set in the described local outer surface of golden part (11) or the local outer surface of porcelain piece (13) by the mode of shrinkage, or interface (130) place of described golden part (11) after mucilage binding and porcelain piece (13) is set in by the mode of shrinkage.

2. novel non-maintaining rigid suspended pin type porcelain composite insulator according to claim 1, is characterized in that: the diameter of the full skirt (171) on described silica gel sheath (17) is greater than the diameter of the full skirt (131) in described porcelain piece (13).

3. novel non-maintaining rigid suspended pin type porcelain composite insulator according to claim 1 and 2, it is characterized in that: described lower golden part (12) comprises bottom (121) and top (122), described bottom (121) is provided with the step (1220) described bottom (121) being divided into Part I (1211) and Part II (1212), the top (122) of described lower golden part (12) is an inverted round stage, the upper bottom surface diameter of a circle of described inverted round stage is equal with the diameter of the Part II (1212) of described lower golden part (12), described lower golden part (12) is provided with screw (124).

4. novel non-maintaining rigid suspended pin type porcelain composite insulator according to claim 3, is characterized in that: also comprise the bulge loop (125) around bottom (120) periphery being located at described lower golden part (12).

5. novel non-maintaining rigid suspended pin type porcelain composite insulator according to claim 3, is characterized in that: the angle between the bus of described inverted round stage and the axle of described inverted round stage is more than or equal to 10 degree to be less than or equal to 20 degree.

6. novel non-maintaining rigid suspended pin type porcelain composite insulator according to claim 3, is characterized in that: the aspect ratio between the Part I (1211) of described lower golden part (12), Part II (1212) and top (122) selects between 3.9:1.4:1.9 and 4.1:1.6:2.1.

7. novel non-maintaining rigid suspended pin type porcelain composite insulator according to claim 3, it is characterized in that: also comprise metalwork (14), described metalwork (14) is vertically located on the step (1220) of described lower golden part (12).

8. novel non-maintaining rigid suspended pin type porcelain composite insulator according to claim 4, it is characterized in that: also comprise metalwork (14), described metalwork (14) is vertically located on the step (1220) of described lower golden part (12).

9. novel non-maintaining rigid suspended pin type porcelain composite insulator according to claim 3, is characterized in that: be arranged to fillet between the Part I (1211) of described lower golden part (12) and the Part II (1212) of lower golden part (12).

10. novel non-maintaining rigid suspended pin type porcelain composite insulator according to claim 3, it is characterized in that: also comprise pad (15), between the top that described pad (15) is located at described golden part (11) and described porcelain piece (13) and/or be located between described lower golden part (12) and described porcelain piece (13).