Porcelain piece and disc type suspension porcelain insulator

Abstract

The utility model relates to the technical field of electric power insulators, and especially relates to a porcelain member and a disc-type suspension porcelain insulator. The porcelain piece comprises an insulator disc and a cylindrical head, and the cylindrical head is arranged on the insulator disc; the cylindrical head is provided with an inner cavity, the inner cavity comprises a first cavity section, and the diameter of the first cavity section is gradually reduced in the first direction, so that the curvature radius of the joint of the side wall of the first cavity section and the bottom wall of the first cavity section is increased. According to the porcelain piece provided by the utility model, the cylindrical head structure is adopted, the inner cavity is arranged in the cylindrical head of the porcelain piece, and the inner diameter of the first cavity section of the inner cavity is gradually reduced along the first direction on the premise that the stress position is almost not changed after the filling structure between the cylindrical head and the metal cap shrinks and mechanical damage is not easy to occur after long-term operation; the curvature radius of the joint of the first cavity section side wall and the first cavity section bottom wall is increased, the electric breakdown resistance of the porcelain piece can be improved, and sanding and glazing in the inner cavity are not needed.

Description

Technical Field

[0001] The utility model relates to the technical field of power insulators, in particular to a porcelain piece and a disc-type suspension porcelain insulator. Background Art

[0002] Disc-type suspension insulators are the most commonly used insulators in transmission lines and play a vital role in power transmission and transformation systems.

[0003] At present, disc-type suspension insulators have cylindrical head and conical head structures. The cylindrical head structure uses less material and is highly economical, but the electric field is concentrated on the head and the voltage resistance margin is low. The inner side of the porcelain part of the cylindrical head product needs to be glazed and sanded. After adding glazing and sanding to the inner side of the porcelain part, it is easy to guide the breakdown, further increasing the risk of electrical breakdown. The head of the porcelain part of the conical head structure has a larger radius of curvature, and the product has a more uniform electric field at the same voltage, and is less likely to have electrical breakdown. In addition, insulator products are always subjected to mechanical tension during use, and the shrinkage of cement can easily cause stress concentration in the porcelain part. The amount of cement used between the iron cap and the porcelain part of the conical head structure product is large, and the volume of cement will shrink proportionally during long-term use, resulting in large shrinkage of cement at the iron cap of the conical head structure and a large decrease in mechanical properties. Utility Model Content

[0004] The utility model provides a porcelain piece and a disc-type suspension porcelain insulator, which are used to solve the defects in the prior art that the porcelain piece of the disc-type suspension insulator with a cylindrical head structure is prone to electrical breakdown and the disc-type suspension insulator with a conical head structure has poor mechanical properties.

[0005] The utility model provides a porcelain component, comprising an insulator disc and a cylindrical head, wherein the cylindrical head is arranged on the insulator disc;

[0006] The cylindrical head is provided with an inner cavity, and the inner cavity includes a first cavity section, and the diameter of the first cavity section gradually decreases along a first direction to increase the curvature radius of the connection between the side wall of the first cavity section and the bottom wall of the first cavity section.

[0007] According to the porcelain piece provided by the utility model, the angle between the bottom wall of the first cavity section and the side wall of the first cavity section ranges from 30° to 45°.

[0008] According to the porcelain piece provided by the utility model, a chamfered structure is provided at the connection position between the bottom wall of the first cavity section and the side wall of the first cavity section.

[0009] According to the porcelain piece provided by the utility model, the outer wall of the cylindrical head is provided with a sand glaze layer.

[0010] Another aspect of the utility model provides a disc-type suspension porcelain insulator, comprising a metal cap and a porcelain piece as described above, wherein the metal cap is arranged on the cylindrical head, and a first filling structure is arranged between the inner wall of the metal cap and the outer wall of the cylindrical head.

[0011] According to the disc-type suspension porcelain insulator provided by the utility model, the first filling structure is a cement filling structure.

[0012] The disc-type suspension porcelain insulator provided by the utility model further includes a steel foot, one end of which is arranged in the inner cavity, and a second filling structure is arranged between the outer wall of the steel foot and the cavity wall of the inner cavity.

[0013] According to the disc-type suspension porcelain insulator provided by the utility model, the second filling structure is a cement filling structure.

[0014] According to the disc-type suspension porcelain insulator provided by the utility model, the metal cap is an iron cap.

[0015] The porcelain part provided by the utility model adopts a cylindrical head structure. Under the premise that the filling structure between the cylindrical head and the metal cap hardly changes the stress position after shrinkage, and mechanical damage is not easy to occur during long-term operation, an inner cavity is set in the cylindrical head of the porcelain part, and the inner diameter of the first cavity section of the inner cavity gradually decreases along the first direction, thereby increasing the radius of curvature at the connection between the side wall of the first cavity section and the bottom wall of the first cavity section, thereby improving the resistance to electrical breakdown of the porcelain part, and there is no need to sand or glaze in the inner cavity. The porcelain part and disc-type suspension porcelain insulator provided by the utility model solve the defects of the prior art that the porcelain part of the disc-type suspension insulator with a cylindrical head structure is prone to electrical breakdown, and the disc-type suspension insulator with a conical head structure has poor mechanical properties.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of a porcelain piece provided by an embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of a disc-type suspension porcelain insulator provided by an embodiment of the utility model.

[0020] Reference numerals:

[0021] 10. Porcelain part; 110. Insulator plate; 120. Cylindrical head; 130. Inner cavity; 131. First cavity section; 132. Second cavity section; 140. Sand glaze layer; 20. Metal cap; 30. First filling structure; 40. Steel foot; 50. Second filling structure. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0024] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0025] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0027] Combine the following Figure 1 and Figure 2 The utility model describes a porcelain component and a disc-type suspension porcelain insulator.

[0028] It should be noted that the porcelain component provided by the present invention specifically refers to a porcelain component used in a disc-type suspension porcelain insulator.

[0029] See also Figure 1 As shown, the porcelain component 10 provided in the embodiment of the utility model includes an insulator disk 110 and a cylindrical head 120, and the cylindrical head 120 is arranged on the insulator disk 110; the cylindrical head 120 is provided with an inner cavity 130, and the inner cavity 130 includes a first cavity section 131, and the diameter of the first cavity section 131 gradually decreases along the first direction to increase the curvature radius of the connection between the side wall of the first cavity section 131 and the bottom wall of the first cavity section 131.

[0030] It should be noted that the first direction specifically refers to Figure 1 The vertical downward direction shown in .

[0031] The porcelain part 10 provided by the utility model adopts a cylindrical head 120 structure. Under the premise that the filling structure between the cylindrical head 120 and the metal cap 20 almost does not change the stress position after shrinkage, and mechanical damage is not easy to occur during long-term operation, an inner cavity 130 is set in the cylindrical head 120 of the porcelain part 10, and the inner diameter of the first cavity section 131 of the inner cavity 130 gradually decreases along the first direction, increasing the radius of curvature at the connection between the side wall of the first cavity section 131 and the bottom wall of the first cavity section 131, which can improve the electrical breakdown resistance of the porcelain part 10, and there is no need to sand or glaze in the inner cavity 130. The porcelain part 10 and the disc-type suspension porcelain insulator provided by the utility model solve the defects of the porcelain part 10 of the disc-type suspension insulator with a cylindrical head 120 structure in the prior art that the porcelain part 10 is prone to electrical breakdown, and the disc-type suspension insulator with a conical head structure has poor mechanical properties.

[0032] Specifically, see Figure 1As shown, in this embodiment, the inner cavity 130 includes a first cavity segment 131 and a second cavity segment 132, wherein the first cavity segment 131 is located inside the second cavity segment 132. The diameter of the first cavity segment 131 gradually decreases along the first direction to form a conical cavity, and the connection (corner) between the side wall and the bottom wall of the conical cavity has a larger curvature radius than that of the cylindrical cavity, so it has better electrical breakdown resistance.

[0033] The insulator disc 110 is the main part of the porcelain part 10 and has a disc or dish shape. It is made of special structural design and ceramic material, has good insulation performance, can prevent current from passing through and support the transmission line.

[0034] According to some embodiments of the present invention, the angle between the bottom wall of the first cavity segment 131 and the side wall of the first cavity segment 131 is in the range of 30° to 45°. By controlling the angle between the bottom wall of the first cavity segment 131 and the side wall of the first cavity segment 131 to be in the range of 30° to 45°, the stability of the ceramic component 10 can be improved while ensuring the electrical breakdown resistance of the ceramic component 10.

[0035] See also Figure 1 As shown, according to some embodiments of the present invention, a chamfered structure is provided at the connection position between the bottom wall of the first cavity segment 131 and the side wall of the first cavity segment 131. The chamfered structure can make the connection between the bottom wall of the first cavity segment 131 and the side wall of the first cavity segment 131 more uniform, which is conducive to dispersing stress and reducing fatigue damage and crack generation of the structure.

[0036] See also Figure 1 As shown, according to some embodiments of the utility model, the outer wall of the cylindrical head 120 is provided with a sand glaze layer 140. By providing the sand glaze layer 140, it is possible to prevent dirt from adhering to the surface of the insulator, thereby reducing the impact of dirt on the insulator. The accumulation of dirt on the surface of the insulator may cause flashover discharge, thereby affecting the insulation performance and the safe operation of the transmission line. The smooth surface of the sand glaze layer 140 makes it difficult for dirt to adhere, thereby reducing the possibility of flashover discharge. In addition, the sand glaze layer 140 has good insulation performance, can form an insulation film on the surface of the insulator, increase the insulation distance of the insulator, improve the insulation performance, and can prevent current from passing through the surface of the insulator, thereby ensuring the safe operation of the power system.

[0037] See also Figure 2 As shown, the disc-type suspension porcelain insulator provided by the embodiment of the utility model includes a metal cap 20 and a porcelain part 10 as described in any of the above embodiments. The metal cap 20 is covered on the cylindrical head 120, and a first filling structure 30 is provided between the inner wall of the metal cap 20 and the outer wall of the cylindrical head 120.

[0038] The disc-type suspension porcelain insulator provided by the utility model adopts the above-mentioned porcelain part 10. Therefore, under the premise of ensuring that the filling structure between the cylindrical head 120 and the metal cap 20 hardly changes the stress position after shrinkage and is not prone to mechanical damage during long-term operation, the electrical breakdown resistance of the porcelain part 10 can be improved, and there is no need to sand or glaze the inner cavity 130.

[0039] According to some embodiments of the present invention, the first filling structure 30 is a cement filling structure. By using cement filling between the inner wall of the metal cap 20 and the outer wall of the cylindrical head 120, the gap between the inner wall of the metal cap 20 and the outer wall of the cylindrical head 120 can be filled and support and connect the two, thereby enhancing the bonding force between the metal cap 20 and the cylindrical head 120 and reducing problems caused by looseness. In addition, cement is easy to obtain and process, and has good high temperature resistance, pressure resistance and weather resistance.

[0040] See also Figure 2 As shown, according to some embodiments of the utility model, the disc-type suspension porcelain insulator further includes a steel foot 40, one end of which is disposed in the inner cavity 130, and a second filling structure 50 is disposed between the outer wall of the steel foot 40 and the cavity wall of the inner cavity 130. The steel foot 40 of the disc-type suspension porcelain insulator is used to support the insulator so that it can withstand the voltage and mechanical load in the power system and transfer these loads to the supporting structure, such as a tower or a beam. The second filling structure 50 can fill the gap between the outer wall of the steel foot 40 and the cavity wall of the inner cavity 130, and fix the steel foot 40.

[0041] See also Figure 2 As shown, according to some embodiments of the present invention, the second filling structure 50 is a cement filling structure. The cement filling structure fills the gap between the outer wall of the steel foot 40 and the cavity wall of the inner cavity 130 and provides support and connection for the steel foot 40, thereby reducing problems caused by looseness of the steel foot 40. In addition, cement is easy to obtain and process, and has good high temperature resistance, pressure resistance and weather resistance.

[0042] According to some embodiments of the present invention, the metal cap 20 is an iron cap, which has good mechanical strength, corrosion resistance, and electrical performance, and can ensure the stable operation of the insulator under various working conditions.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A porcelain part, characterized in that: It comprises an insulator disc and a cylindrical head, wherein the cylindrical head is arranged on the insulator disc; The cylindrical head is provided with an inner cavity, and the inner cavity includes a first cavity section, and the diameter of the first cavity section gradually decreases along a first direction to increase the curvature radius of the connection between the side wall of the first cavity section and the bottom wall of the first cavity section.

2. The porcelain article according to claim 1, characterized in that: The angle between the bottom wall of the first cavity section and the side wall of the first cavity section ranges from 30° to 45°.

3. The porcelain article according to claim 1, characterized in that: A chamfered structure is provided at a connection position between the bottom wall of the first cavity section and the side wall of the first cavity section.

4. The porcelain article according to claim 1, characterized in that: The outer wall of the cylindrical head is provided with a sand glaze layer.

5. A disc-type suspension porcelain insulator, characterized in that: It comprises a metal cap and the porcelain piece as claimed in any one of claims 1 to 4, wherein the metal cap is covered on the cylindrical head, and a first filling structure is provided between the inner wall of the metal cap and the outer wall of the cylindrical head.

6. The disc-type suspension porcelain insulator according to claim 5, characterized in that: The first filling structure is a cement filling structure.

7. The disc-type suspension porcelain insulator according to claim 5, characterized in that: It also includes a steel foot, one end of which is arranged in the inner cavity, and a second filling structure is arranged between the outer wall of the steel foot and the cavity wall of the inner cavity.

8. The disc-type suspension porcelain insulator according to claim 7, characterized in that: The second filling structure is a cement filling structure.

9. The disc-type suspension porcelain insulator according to claim 5, characterized in that: The metal cap is an iron cap.

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