CN218404500U

CN218404500U - Tungsten wire rope for pulling monocrystalline silicon

Info

Publication number: CN218404500U
Application number: CN202121852808.4U
Authority: CN
Inventors: 符云舒
Original assignee: Baoji Zhipu Non Ferrous Metals Processing Co ltd
Current assignee: Baoji Zhipu Non Ferrous Metals Processing Co ltd
Priority date: 2021-08-10
Filing date: 2021-08-10
Publication date: 2023-01-31
Anticipated expiration: 2031-08-10

Abstract

The utility model discloses a tungsten filament rope for pulling monocrystalline silicon, which comprises a central strand layer and an outer wrapping strand layer wound on the central strand layer, wherein the central strand layer comprises a central strand, a plurality of layers of central outer wrapping strand layers are arranged outside the central strand, and the central outer wrapping strand layers comprise a plurality of central outer wrapping strands; the outer wrapping strand layer comprises an outer wrapping strand wound outside the central outer wrapping strand; the diameter of the outer wrapping strand is larger than that of the central wrapping strand and/or the central strand, so that the overall tensile resistance of the tungsten wire rope is further increased and the flexibility of the rope body is obviously improved on the premise that the original diameter size of the tungsten wire rope is achieved. The structural innovation makes the production and preparation of the large-diameter tungsten wire rope (the diameter is more than phi 4.5) possible, breaks through the technical bottleneck of the production of the maximum specification tungsten wire rope for photovoltaic in China, fills the blank of the industry, and in addition, the selected material is tungsten, so the invention has the characteristics of corrosion resistance and high temperature resistance.

Description

Tungsten wire rope for pulling monocrystalline silicon

Technical Field

The utility model relates to a photovoltaic trade field especially relates to a monocrystalline silicon is carried and is drawn and use tungsten filament rope.

Background

With the rapid development of the solar photovoltaic industry, the weight of a single rod of a czochralski method silicon single crystal rod in the photovoltaic industry breaks through 1000KG currently, which requires that the bearing capacity and the safety performance flexibility of a tungsten wire rope pulling flexible shaft used in the growth of monocrystalline silicon are increased increasingly, the diameter of an original wire of a 19 x 7 structure tungsten wire rope produced by the traditional process is also increased continuously in the diameter increasing process, the production and preparation feasibility of the tungsten wire rope is limited by the processing performance of the material, and the tungsten wire rope reaches the technical bottleneck (the tungsten wire rope is obvious after the diameter of the tungsten wire rope exceeds 4.5 mm), and the minimum bending radius of a rope body of the tungsten wire rope in the traditional structure is too large due to the winding structure, the tungsten wire rope is poor in flexibility, the tungsten wire rope is not beneficial to being wound on a wire winding wheel of a single crystal furnace, and multiple problems such as wire breakage, crystal oscillation, crystal seeding deviation and the like are easily generated during the use.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned drawbacks or deficiencies, an object of the present invention is to provide a tungsten wire rope for pulling monocrystalline silicon.

In order to achieve the above purpose, the technical scheme of the utility model is that:

the tungsten wire rope for pulling the monocrystalline silicon comprises a central strand layer and an outer strand layer wound on the central strand layer, wherein the central strand layer comprises a central strand, a plurality of layers of central outer strand layers are arranged outside the central strand, and the central outer strand layers comprise a plurality of central outer strand layers; the outer wrapping strand layer comprises an outer wrapping strand wound outside the central outer wrapping strand; the diameter of the sheath strand is larger than the diameter of the central sheath strand and/or the central strand.

The central strand is formed by winding 7 central strand protofilaments, and the diameter of each central strand protofilament is 0.18-0.27 mm.

The central outer wrapping strand layer comprises two layers, and the number of the central outer wrapping strands of each layer from inside to outside is 6 and 12 respectively.

The central outer wrapping strand is formed by winding 7 central outer wrapping strand protofilaments, and the diameter of the central outer wrapping strand protofilaments is 0.16-0.25 mm.

The outer wrapping strand is formed by winding 7 outer wrapping strand precursor yarns, and the diameter of the outer wrapping strand precursor yarns is 0.27-0.37 mm.

The central wrapping strand and the wrapping strand are both subjected to pre-denaturation treatment and have a spiral structure and torque.

The pitch of the pre-deformed thread is 2.88-3.52 mm.

The total diameter of the tungsten wire rope for pulling the monocrystalline silicon formed by the central strand layer and the outer strand layer is 4mm-8mm.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a monocrystalline silicon is carried and is drawn and use tungsten filament rope, carry through changing monocrystalline silicon and draw structure and the diameter with tungsten filament rope center strand layer, can will adopt 12 (19) coiling structure to replace traditional 19 a 7 structure, this kind of coiling structure increases to present 217 tungsten filament from original 19 a 7 tungsten filament, this kind of structure is through increasing tungsten filament rope tungsten filament quantity, reduce the monofilament diameter, under the prerequisite that reaches the former diameter size of tungsten filament rope, further increase the whole stretching resistance of tungsten filament rope, and show and improve rope body pliability. The structural innovation makes the production and preparation of the large-diameter tungsten wire rope (the diameter is more than phi 4.5 mm) possible, breaks through the technical bottleneck of the production of the maximum specification tungsten wire rope for photovoltaic in China, fills the blank of the industry, and in addition, the selected material is tungsten, so the invention has the characteristics of corrosion resistance and high temperature resistance.

Drawings

FIG. 1 is a schematic view of a tungsten wire rope for pulling single crystal silicon according to the present invention.

In the figure, 1 — the central strand layer; 2, wrapping a strand layer; 11 — central strand; 111-central strand strands; 12-a central outer wrap strand layer; 121-core wrap strand; 1211 — central outer wrap strand; 21-wrapping strand; 211-wrapping strand.

Detailed Description

The present invention will be described in detail with reference to the drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, the utility model provides a tungsten wire rope for pulling monocrystalline silicon, which comprises a central strand layer and an outer sheath strand layer wound on the central strand layer, wherein the central strand layer comprises a central strand, a plurality of layers of central outer sheath strand layers are arranged outside the central strand, and the central outer sheath strand layers comprise a plurality of central outer sheath strands; the outer wrapping strand layer comprises an outer wrapping strand wound outside the central outer wrapping strand; the diameter of the sheath strand is larger than the diameter of the central sheath strand and/or the central strand.

The central strand) is formed by winding 7 central strand precursor wires, and the diameter of the central strand precursor wires is 0.18-0.27 mm. The central outer-wrapping strand is formed by winding 7 central outer-wrapping strand precursor yarns, and the diameter of the central outer-wrapping strand precursor is 0.16-0.25 mm.

The utility model discloses in, center thigh) is provided with multilayer center outsourcing strand layer outward, and is exemplary, and center outsourcing strand layer includes two-layerly, and by interior every layer of center outsourcing strand's quantity be 6 and 12 respectively outside to, center thigh 11 quantity is 1, so center thigh 1 in the silk quantity be 19X 7's 133 tungsten filaments. Further, since the outer strand is formed by winding 7 outer strand strands, and the number of the outer strand strands is directly 0.27mm to 0.37mm and 12, the number of tungsten filament strands in the entire tungsten filament rope for pulling single crystal silicon is 12 (19 × 7), and 217 tungsten filaments are total, and the total diameter of the tungsten filament rope for pulling single crystal silicon formed of the center strand layer and the outer strand layer is 4mm to 8mm. According to the structure, the number of tungsten wires of the tungsten wire rope is increased, the diameter of each single wire is reduced, the overall tensile resistance of the tungsten wire rope is further increased on the premise that the original diameter size of the tungsten wire rope is reached, and the flexibility of the rope body is obviously improved. The structural innovation enables the production and preparation of the large-diameter tungsten wire rope (the diameter is more than phi 4.5) to be possible, breaks through the production technical bottleneck of the maximum specification tungsten wire rope for photovoltaic in China, and fills the industrial blank. Because the selected material is tungsten, the invention has the characteristics of corrosion resistance and high temperature resistance. Compared with the traditional 19 x 7 structure, the production efficiency of the tungsten wire rope with the innovative structure is reduced by 34%, and the cost is increased by 48%.

Exemplary, direct results for individual filaments of tungsten wire rope of different diameters are shown in table 1:

data for tungsten wire ropes with different diameters

The utility model adds 133 tungsten filaments from 19 x 7 to 217 tungsten filaments from 12 x (19 x 7); meanwhile, the diameter of 133 monofilaments of the central strand (the diameter of the monofilaments is about 65 percent of that of the original tungsten wire) is reduced to improve the overall toughness and the tensile force of the tungsten wire rope body;

the results of the experiment are shown in table 2:

TABLE 2 Experimental data for tungsten ropes of different diameters

As can be seen from the above table, the tungsten wire ropes with the specifications of over phi 5.5 cannot be produced by the traditional 19 x 7 process due to the material performance;

the inventive structure 12 x (19 x 7) has an average 9% higher tensile strength than the conventional 19 x 7 structure at the same diameter of the tungsten wire rope.

With the same diameter of the tungsten wire rope, the minimum bending diameter of the inventive structure 12 × 7 is reduced by 15% on average compared with the conventional 19 × 7 structure, and the inventive structure 12 × 7 is more flexible. 12, the winding structure of 19 and 7 provides conditions for realizing the tungsten wire rope for the photovoltaic with the large diameter, the structural innovation enables the tensile force and the flexibility of the tungsten wire rope with the existing structure to be simultaneously improved, and meanwhile, the preparation of the tungsten wire rope with the large diameter for the photovoltaic (the diameter of the tungsten wire rope is 4.5-8.0 mm) is realized.

For those skilled in the art, it is obvious that the above specific embodiments are only the preferred embodiments of the present invention, and therefore, the improvement and the change that some parts in the present invention may make are still embodied by the principle of the present invention, and the purpose of the present invention is still achieved by those skilled in the art, which all belong to the protection scope of the present invention.

Claims

1. A tungsten wire rope for pulling monocrystalline silicon, comprising a central strand layer (1) and an outer sheath strand layer (2) wound outside the central strand layer (1), wherein the central strand layer (1) comprises a central strand (11), a plurality of central outer sheath strand layers (12) are arranged outside the central strand (11), and the central outer sheath strand layers (12) comprise a plurality of central outer sheath strands (121); the outer wrapping strand layer (2) comprises an outer wrapping strand (21) wound outside the central outer wrapping strand (121); the diameter of the sheath strand (21) is larger than the diameter of the central sheath strand (121) and/or the central strand (11).

2. The tungsten wire rope for pulling single-crystal silicon according to claim 1, wherein the central strand (11) is wound from 7 central strand filaments (111), and the diameter of the central strand filaments (111) is 0.18mm to 0.27mm.

3. The tungsten wire rope for pulling single crystal silicon as claimed in claim 1, wherein the central outer clad strand layer (12) comprises two layers, and the number of the central outer clad strands (121) in each layer from inside to outside is 6 and 12, respectively.

4. The tungsten wire rope for pulling single crystal silicon as claimed in claim 1 or 3, wherein the central outer clad strand (121) is wound from 7 central outer clad strand strands (1211), and the diameter of the central outer clad strand strands (1211) is 0.16mm to 0.25mm.

5. The tungsten wire rope for pulling single crystal silicon as claimed in claim 1, wherein the outer clad strand (21) is wound from 7 outer clad strand filaments (211), and the diameter of the outer clad strand filaments (211) is 0.27mm to 0.37mm.

6. The tungsten wire rope for pulling single crystal silicon as claimed in claim 1, wherein the central outer clad strand (121) and the outer clad strand (21) are each subjected to a pre-denaturation treatment and have a helical structure and a torque.

7. The tungsten wire rope for pulling up single crystal silicon as claimed in claim 6, wherein the pitch of the pre-deformed thread is 2.88 to 3.52mm.

8. The tungsten wire rope for pulling up single-crystal silicon according to claim 1, wherein the total diameter of the tungsten wire rope for pulling up single-crystal silicon formed by the central strand layer (1) and the outer sheath strand layer (2) is 4mm to 8mm.