CN105927024A - Low-voltage network electric pole - Google Patents

Abstract

The invention relates to a pole of a low-voltage distribution network. It includes a rod body, the rod body includes a supporting core column, the outer surface of the supporting core column is provided with a cloth-impregnated resin layer, and the outer surface of the cloth-impregnated resin layer is provided with a protective layer. Fiber cloth or non-woven fabric, the cloth impregnated resin layer is melted and tightly wound on the outer surface of the supporting core column, the bottom of the rod body is provided with a base that is fixedly connected with the supporting core column, and the upper part of the rod body is provided with a wire rack that is fixedly connected with the supporting core column The rod; the supporting core column includes the following raw materials in parts by weight: 40-60 parts of Ti, 40-60 parts of Al, 5-10 parts of Cr, 1-3 parts of Mn, 8-10 parts of tetraacicular zinc oxide whiskers, mixed rare earth 1-4 parts, tetraacicular zinc oxide whiskers are tetraacicular zinc oxide whiskers with a length of 10-12 μm and a root diameter of 1-1.5 μm. The invention has the advantages of reasonable structural design, high strength, good bending resistance and light weight, and the wiring pole is fixedly connected with the supporting core column, thereby ensuring the reliability of the connection.

Description

A low-voltage distribution network pole

technical field

The invention relates to a pole of a low-voltage distribution network.

Background technique

The low-voltage distribution network is composed of overhead lines, cables, poles, distribution transformers, isolating switches, reactive power compensators and ancillary facilities, etc., and plays an important role in distributing electric energy in the power network. The pole is an important part of the transmission line equipment of the low-voltage distribution network, and it undertakes the important task of erecting the transmission line. However, most of the existing electric poles are designed as simple hollow cement tubes, which are heavy in weight, limited in strength, poor in bending resistance, and easily damaged by external forces and collapsed. In addition, the wire poles are also fixed on the poles by screws, which are easy to loosen and fall off after a long time, causing power failure accidents.

Contents of the invention

The invention provides a pole of a low-voltage distribution network, which has reasonable structural design, high strength, good bending resistance, light weight, and the pole is fixedly connected with the supporting core column, which ensures the reliability of the connection and solves the problem of existing problems. There are problems in the technology.

The technical scheme adopted by the present invention to solve the above technical problems is: it includes a rod body, which is characterized in that: the rod body includes a supporting stem, the outer surface of the supporting stem is provided with a cloth-impregnated resin layer, and the outer surface of the cloth-impregnated resin layer is provided with a protective The cloth-impregnated resin layer is fiberglass cloth or carbon fiber cloth or glass fiber cloth or non-woven fabric impregnated with resin. After the cloth-impregnated resin layer is melted, it is tightly wound on the outer surface of the supporting core column. The base of the connection, the upper part of the rod body is provided with a wire frame rod fixedly connected with the supporting core column; the supporting core column includes the following raw materials in parts by weight: 40-60 parts of Ti, 40-60 parts of Al, 5-10 parts of Cr, Mn1- 3 parts, 8-10 parts of tetraacicular zinc oxide whiskers, 1-4 parts of mixed rare earth, tetraacicular zinc oxide whiskers are tetraacicular zinc oxide crystals with a length of 10-12 μm and a root diameter of 1-1.5 μm beard.

The wire rack rod is perpendicular to the supporting core column.

The upper and lower ends of the supporting stem are provided with terminals for connecting to lightning rods.

The mixed rare earths are composed of yttrium, berkelium and lanthanum, and the mass ratio of the three is 1:(0.20-0.22):(0.30-0.32).

The supporting core column includes the following raw materials in parts by weight: 50 parts of Ti, 50 parts of Al, 6 parts of Cr, 2 parts of Mn, 9 parts of tetraacicular zinc oxide whiskers, and 3 parts of misch.

The supporting core column includes the following raw materials in parts by weight: 40 parts of Ti, 40 parts of Al, 5 parts of Cr, 1 part of Mn, 8 parts of tetraacicular zinc oxide whiskers, and 1 part of misch.

The supporting core column includes the following raw materials in parts by weight: 60 parts of Ti, 60 parts of Al, 10 parts of Cr, 3 parts of Mn, 10 parts of tetraacicular zinc oxide whiskers, and 4 parts of misch.

The diameter of the rod body decreases gradually from the lower end to the upper end.

The present invention adopts above-mentioned scheme, has the following advantages:

1. Since the main component of the supporting core column is TiAl, which is an intermetallic compound material, it has the characteristics of high hardness and high strength. TiAl is an intermetallic compound alloy, which has low density, high specific strength and high specific stiffness, which greatly improves the overall strength and bending resistance of the rod body, and ensures the safety of the pole. It can reduce the weight of the supporting core column, increase the specific strength and specific stiffness of the supporting core column, and effectively improve the toughness and plasticity of the supporting core column. Both Cr and Mn are high-melting point metals. During the sintering process, it dissolves in the TiAl crystal lattice, changes the TiAl crystal type, and weakens its inherent brittleness. Tetraacicular zinc oxide whiskers are used as reinforcing particles. The three-dimensional crystal structure of tetraacicular zinc oxide whiskers is dispersed in the TiAl matrix and can act as a skeleton. The unique three-dimensional space structure makes it more gripping with the TiAl matrix. , the strengthening effect is more significant, so that the tensile strength is significantly increased, and the transverse and longitudinal tensile strength values are basically the same, which strengthens the mechanical properties of the TiAl matrix material isotropically, and significantly improves the strength and processing performance of the TiAl matrix.

2. There is a cloth-impregnated resin layer on the outer surface of the supporting core column. The cloth-impregnated resin layer is fiberglass cloth or carbon fiber cloth or glass fiber cloth or non-woven fabric soaked with resin. The cloth-impregnated resin layer is tightly wound around the supporting core column after melting The surface further improves the overall strength and bending resistance of the rod body, and improves the corrosion resistance of the rod body. A protective layer is provided on the outer surface of the cloth-impregnated resin layer, and the protective layer serves as the outermost layer and plays a protective role. The protective layer can be made of materials such as concrete.

3. Since the base and the wire rack rods are firmly connected with the supporting core column, the reliability of the connection between the base and the wire rack rods is ensured, and the safety of power transmission is ensured.

4. The upper and lower ends of the supporting stem are provided with terminals for connecting lightning rods. This structural design directly utilizes the conductivity of the supporting core column, which is beneficial to the subsequent construction of the lightning rod installation.

5. Mixed rare earths are composed of yttrium, berkelium and lanthanum. It plays a deoxidizing and desulfurizing role in casting, which can reduce the content of both to less than 0.001%, and change the state of inclusions, refine grains, and improve alloy materials. Improve the processing performance, improve strength, toughness, corrosion resistance and oxidation resistance, etc.

6. The diameter of the rod body decreases gradually from the lower end to the upper end, which lowers the center of gravity of the rod body, improves the stability of the rod body, saves materials, and reduces manufacturing costs.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

In the figure, 1. rod body, 2. base, 3. wire rack rod, 101. supporting stem, 102. cloth impregnated resin layer, 103. protective layer.

detailed description

In order to clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific implementation modes and in conjunction with the accompanying drawings.

Example 1

As shown in the figure, the present invention includes a rod body 1. The rod body 1 includes a supporting stem 101. The outer surface of the supporting stem 101 is provided with a cloth-impregnated resin layer 102. The outer surface of the cloth-impregnated resin layer 102 is provided with a protective layer 103. The resin layer 102 is fiberglass cloth or carbon fiber cloth or glass fiber cloth or non-woven fabric impregnated with resin, and the cloth impregnated with resin layer 102 is tightly wound on the outer surface of the support core 101 after melting. The bottom of the rod body 1 is provided with a base 2 fixedly connected to the supporting stem 101 , and the upper part of the rod body 1 is provided with a wire rack rod 3 fixedly connected to the supporting stem 101 , and the wire rack rod 3 is perpendicular to the supporting stem 101 . The upper and lower ends of the supporting stem 101 are provided with terminals (not shown in the figure) for connecting to lightning rods. The diameter of the rod body 1 gradually decreases from the lower end to the upper end.

When making the cloth-impregnated resin layer 102, the resin can be melted first, and then the fiberglass cloth or carbon fiber cloth or glass fiber cloth or non-woven fabric is soaked in it for about 2 to 5 minutes, so that the fiberglass cloth or carbon fiber cloth or glass fiber cloth Or the surface of the non-woven fabric is fully covered with resin, and then it is taken out to cool and harden, and it is used as a raw material for later use. Then, fiberglass cloth, carbon fiber cloth, glass fiber cloth or non-woven cloth impregnated with resin is wound on the outer surface of the support stem 101, and wound in multiple layers to form a semi-finished product. After the winding is completed, the semi-finished product is radially pressed from the outside to the inside, so that the resin-impregnated fiberglass cloth, carbon fiber cloth, glass fiber cloth or non-woven cloth wound on the outer surface of the support core 101 is tightly bonded, and heated while pressing , make the resin melt and cling to the outer surface of the support stem 101 and make the resin-impregnated layers of the wrapped multi-layer cloth closely fuse together through the melted resin. Then cool, and finally spray the protective layer 103 as the outer layer, and the product is formed. Among them, the pressure applied to the semi-finished product is related to the strength requirements of the finished product. The greater the pressure, the stronger the strength of the rod body 1 and the stronger the bending resistance, and vice versa. The pressure value is based on the requirements of the rod body. It depends, so I won’t go into details here.

The supporting stem 101 includes the following raw materials in parts by weight: 50 parts of Ti, 50 parts of Al, 6 parts of Cr, 2 parts of Mn, 9 parts of tetraacicular zinc oxide whiskers, 3 parts of mixed rare earth, and tetraacicular zinc oxide whiskers of Tetraacicular zinc oxide whiskers with a length of 10-12 μm and a root diameter of 1-1.5 μm. The mixed rare earth is composed of yttrium, berkelium and lanthanum, and the mass ratio of the three is 1: (0.20-0.22): (0.30-0.32).

The preparation method of the supporting stem 101 is as follows: (1) mixing and ball milling the above-mentioned raw materials, and performing drying treatment to obtain a supersaturated solid solution powder; (2) annealing the supersaturated solid solution powder to obtain a mutated titanium-aluminum intermetallic compound powder; (3) Add plasticizer and mixed rare earth to the mixed powder and mix evenly to make easy-flowing pellets; (4) Leave the pellets to stand; (5) Cold press the powder after standing Forming to obtain a compact blank with the desired shape; (6) Put the cold-pressed blank into a hot-press sintering furnace for vacuum hot-press sintering and heat preservation, and vacuum the sintering furnace before sintering; (7) Put the Put the hot-pressed blank into the preheated investment casting mold shell, heat and melt it in an electric furnace, and then put it into another electric furnace for heat preservation and cooling; (8) Shot blast the cooled casting blank , to remove surface formwork material.

Since the main component of the supporting stem 101 is TiAl, which is an intermetallic compound material, it has the characteristics of high hardness and high strength. TiAl is an intermetallic compound alloy, which has low density, high specific strength and high specific stiffness, which greatly improves the overall strength and bending resistance of the pole body 1 and ensures the safety of the pole. It can reduce the weight of the supporting core column 101, increase the specific strength and specific stiffness of the supporting core column 101, and effectively improve the toughness and plasticity of the supporting core column. Both Cr and Mn are high-melting point metals. During the sintering process, it dissolves in the TiAl crystal lattice, changes the TiAl crystal type, and weakens its inherent brittleness. Tetraacicular zinc oxide whiskers are used as reinforcing particles. The three-dimensional crystal structure of tetraacicular zinc oxide whiskers is dispersed in the TiAl matrix and can act as a skeleton. The unique three-dimensional space structure makes it more gripping with the TiAl matrix. , the strengthening effect is more significant, so that the tensile strength is significantly increased, and the transverse and longitudinal tensile strength values are basically the same, which strengthens the mechanical properties of the TiAl matrix material isotropically, and significantly improves the strength and processing performance of the TiAl matrix.

The outer surface of the support stem 101 is provided with a cloth-impregnated resin layer 102, which is fiberglass cloth, carbon fiber cloth, glass fiber cloth or non-woven fabric impregnated with resin, and the cloth-impregnated resin layer is tightly wound on the support stem after melting The outer surface of 101 further improves the overall strength and bending resistance of the rod body 1 , and improves the corrosion resistance of the rod body 1 . A protective layer 103 is provided on the outer surface of the cloth-impregnated resin layer 102, and the protective layer 103 is used as the outermost layer to play a protective role. The protective layer 103 can be made of concrete and other materials.

Since the base 2 and the wire rack rod 3 are all fixedly connected to the supporting core column 101, the reliability of the connection between the base 2 and the wire rack rod 3 is ensured, and the safety of power transmission is ensured.

The upper and lower ends of the supporting stem 101 are provided with terminals for connecting lightning rods. This structural design directly utilizes the conductivity of the supporting core column 101, which is beneficial to the subsequent installation of the lightning rod.

Mixed rare earths are composed of yttrium, berkelium and lanthanum. It plays a deoxidizing and desulfurizing role in casting, which can reduce the content of both to less than 0.001%, and change the state of inclusions, refine grains, and improve the processing of alloy materials. Performance, improve strength, toughness, corrosion resistance and oxidation resistance, etc.

The diameter of the rod body 1 gradually decreases from the lower end to the upper end, which lowers the center of gravity of the rod body 1, improves the stability of the rod body 1, saves materials, and reduces manufacturing costs.

Example 2

The difference between this embodiment and Embodiment 1 is that the supporting core 101 column includes the following raw materials in parts by weight: 40 parts of Ti, 40 parts of Al, 5 parts of Cr, 1 part of Mn, 8 parts of tetraacicular zinc oxide whiskers, mixed rare earth 1 serving. The mixed rare earth is composed of yttrium, berkelium and lanthanum, and the mass ratio of the three is 1: (0.20-0.22): (0.30-0.32).

Example 3

The difference between this embodiment and Embodiment 1 is that the supporting stem 101 includes the following raw materials in parts by weight: 60 parts of Ti, 60 parts of Al, 10 parts of Cr, 3 parts of Mn, 10 parts of tetraacicular zinc oxide whiskers, mixed rare earth 4 parts. The mixed rare earth is composed of yttrium, berkelium and lanthanum, and the mass ratio of the three is 1: (0.20-0.22): (0.30-0.32).

The above specific implementation manners cannot be regarded as limiting the protection scope of the present invention. For those skilled in the art, any substitution, improvement or transformation made to the implementation manners of the present invention shall fall within the protection scope of the present invention.

The parts of the present invention that are not described in detail are known technologies of those skilled in the art.

Claims (8)

1. A low-voltage power distribution network pole, comprising a pole body, characterized in that: the pole body comprises a support core column, the outer surface of the support core column is provided with a cloth-impregnated resin layer, the outer surface of the cloth-impregnated resin layer is provided with a protective layer, and the cloth-impregnated resin layer is provided with a protective layer. The resin layer is fiberglass cloth or carbon fiber cloth or glass fiber cloth or non-woven fabric impregnated with resin. The cloth-impregnated resin layer is melted and tightly wound on the outer surface of the supporting stem. The upper part of the rod body is provided with a wire rack rod fixedly connected to the supporting stem; the supporting stem includes the following raw materials in parts by weight: 40-60 parts of Ti, 40-60 parts of Al, 5-10 parts of Cr, 1-3 parts of Mn, 8-10 parts of tetraacicular zinc oxide whiskers and 1-4 parts of mixed rare earth, the tetraacicular zinc oxide whiskers are tetraacicular zinc oxide whiskers with a length of 10-12 μm and a root diameter of 1-1.5 μm. 2. A low-voltage power distribution network pole according to claim 1, characterized in that: the electric pole is perpendicular to the supporting core column. 3. A low-voltage power distribution network pole according to claim 1, characterized in that: the upper and lower ends of the supporting stem are provided with terminals for connecting to lightning rods. 4. A low-voltage distribution network pole according to claim 1, characterized in that: the mixed rare earth is composed of yttrium, berkelium and lanthanum, and the mass ratio of the three is 1: (0.20-0.22): (0.30 -0.32). 5. A low-voltage distribution network pole according to claim 1, characterized in that: said supporting core column comprises the following raw materials in parts by weight: 50 parts of Ti, 50 parts of Al, 6 parts of Cr, 2 parts of Mn, 9 parts of tetrapod zinc oxide whiskers, 3 parts of mixed rare earth. 6. A low-voltage distribution network pole according to claim 1, characterized in that: said supporting core column comprises the following raw materials in parts by weight: 40 parts of Ti, 40 parts of Al, 5 parts of Cr, 1 part of Mn, 8 parts of tetrapod zinc oxide whiskers, 1 part of mixed rare earth. 7. A low-voltage distribution network pole according to claim 1, characterized in that: said supporting core column comprises the following raw materials in parts by weight: 60 parts of Ti, 60 parts of Al, 10 parts of Cr, 3 parts of Mn, 10 parts of tetrapod zinc oxide whiskers, 4 parts of mixed rare earth. 8. A low-voltage distribution network pole according to claim 1, characterized in that: the diameter of the pole body gradually decreases from the lower end to the upper end.