CN2875797Y - Fluoroplastic product - Google Patents

Abstract

The utility model relates to a fluoroplastic product which is composed of inner and outer fluoroplastic layers and metal network. The metal network is arranged between the inner and outer fluoroplastic layers, the grids of the metal network are diamond shapes which are made up of metal wires and the metal wires that are movably cross connected. Since the metal network of such structure can be pulled or compressed along the axis direction, the metal network in the fluoroplastic product is telescopic, so the metal network can not be moved and can stick to the inner and outer fluoroplastic layers tightly in the process of winding or high temperature sintering.

Description

Fluorine plastic product

Technical field

The utility model relates to a kind of fluorine plastic product, especially with the fluorine plastic product of metal net liner.

Background technology

Fluoroplastics especially polytetrafluoroethylplastic plastic (being called for short F4 or PTFE) have been able to extensive use as the lining such as steel components such as anti-corrosion pipeline, tower, stills.But since the F4 goods as the lining of steel component in practical process because both thermal coefficient of expansions differ too great disparity and very easily destroy, thereby influenced of the application of this new material at corrosion-resistant field.For this reason, the utility model people once proposed place mat layer of metal net sheet in the F4 lining in 1988, and excessive swell increment when relying on the wire netting sheet to suppress the F4 anticorrosive products to be heated is to improve the service life of F4 lining.The grid of employed wire netting sheet is the square net that can not be out of shape in this technical scheme, and promptly twine is fixedlyed connected with twine, can not arbitrarily stretch or compress, as shown in Figure 1.There are two big shortcomings in the net sheet of this structure: 1, because the grid of wire netting sheet can not be out of shape stretching or compression, thereby fluorine plastic product is in being inserted in such as pipe during two ends enlarging flange, wire netting sheet in the fluorine plastic product can't influence fluoro-containing plastic Products Quality and serviceability with the fluoroplastic layer flange; 2, make in the winding process at fluorine plastic product, the wire netting of said structure can only be used the outside of net sheet place mat at the fluoroplastics band, can not be made into net integral body is placed in the fluoroplastic layer, because net with this structure fabrication, its diameter can not arbitrarily enlarge or dwindle, be difficult to cooperate with the fluoroplastics internal layer be adjacent to, when twining the fluoroplastics band again in its outside, the net sheet will be sent out the wrinkle distortion; When the goods high temperature sintering expanded, because that F4 band, wire netting and glass tape paste is not tight, expanding the interior pressure that is produced can be not enough, and wire netting can in disorder, displacement, and the goods that come out are will density little, loosen, have micropore, easy to crack, substandard products, percent defective height.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of fluorine plastic product with metal net liner, the above-mentioned defective that the fluorine plastic product that it can overcome the existing wire netting sheet of fixing with mesh shape is liner exists.

Fluorine plastic product provided by the utility model is made up of inside and outside fluoroplastic layer and metal net, wire netting is placed between the inside and outside fluoroplastic layer, the grid of described metal net is a diamond shaped, is made of wire and wire, and wire and wire are the activity cross link.

Because the grid of metal net is made of wire and wire cross, wire and wire are the activity cross link, therefore the rhombogen grid of formation can be compressed or stretch, thereby whole net can in axial direction be stretched or compress, when promptly stretching, the diameter of net shortens, and during compression, the diameter of net is elongated.

Good effect of the present utility model is: 1, owing to adopt the metal net that can stretch and shrink, just can be according to the internal layer diameter of the fluorine plastic product that winds in advance, the enlarged-diameter that earlier wire netting casing pressure weak point is made net is to the internal layer external diameter greater than fluorine plastic product, it is enclosed within the metal net that stretches again behind the internal layer of fluorine plastic product, its diameter is diminished, be close to the internal layer outside, outside net, continue to twine the fluoroplastics skin then, in winding process, the grid of metal net can be according to twining and the stressing conditions variation, make the metal net paste very much clothes, smooth, standard, place in the fluoro-containing plastic equably, between the skin, can be not in disorder, displacement improves Products Quality and qualification rate effectively; 2, since the diameter of net can change, therefore, when band metal net fluorine plastic product and during the hardware phase contrast, the metal net can the fluoro-containing plastic layer flange together, improved the quality and the serviceability of member; 3, owing to net various piece stressing conditions uniformity, goods can not be out of shape under higher temperatures; 4, because the diameter of net and the product of length are constants, goods were in production was used, when temperature raises, the net longitudinal tensile strain, and trans D will enlarge, both condition each other, all can not change, therefore can make the performance of expanding with heat and contract with cold of goods be reduced to optimum state; 5, because the metal net in the goods is scalable, therefore no matter goods are in winding or high-temperature sintering process, net will not be shifted, all the time with goods inside and outside fluoroplastic layer paste mutually very tight, thoroughly solved a wire netting sheet difficult problem aborning of forming by the constant grid of fixed in shape, made extrudate density height, no sand holes, free from flaw that sintering comes out, intensity is big, surfacing is smooth, quality is good, yield rate is high.

Below in conjunction with drawings and Examples technology contents of the present utility model is described further.

Description of drawings

Fig. 1 is the structural representation of the square net sheet of employed fixed mesh in the existing fluorine plastic product.

Fig. 2 is the structural representation of a kind of embodiment of the metal net of the utility model belt variable network.

View when Fig. 3 is the compression of Fig. 2 wire netting cover.

View when Fig. 4 is the stretching of Fig. 2 metal net.

Fig. 5 is the utility model combines the flange part with pipe a metal grill variation schematic diagram.

Fig. 6 is that the A of Fig. 5 is to cutaway view.

The specific embodiment

As Fig. 2, Fig. 5, embodiment shown in Figure 6 is a kind of fluorine plastic product of the band metal net as the metallic conduit lining, form by inside and outside fluoroplastic layer 1 and metal net 2, metal net 2 places between the inside and outside fluoroplastic layer 1, the grid 3 of metal net 2 is a diamond shaped, be made of wire and wire, wire and wire are the activity cross link.Described metal net can be formed by wire and wire weaving, also can be welded by the wire netting sheet of the band network that can stretch and compress.The metal net of this structure can stretch and compression at axial direction.

The fluoro-containing plastic goods of above-mentioned band metal net can adopt following preparation method to obtain: (1), will be wound to the internal layer of desired thickness as goods back and forth on stainless steel mould such as the fluoroplastics strip of F4; (2), the telescopic wire netting casing pressure of axial direction weak point is made the outside that is enclosed within the fluoroplastics internal layer behind the diameter of its diameter greater than above-mentioned fluoroplastics internal layer, then net is stretched, diameter diminishes, and tightly is attached on the fluoroplastics internal layer; (3), outside the metal net, twine the fluoroplastics strip to the skin of desired thickness as goods; (4), on skin, tightly tie up with glass tape; 5, the fluoroplastics prefabrication that will tie up is put into stove and is sintered finished product into.The temperature of sintering furnace can be set according to the fluoroplastics of heterogeneity, and for the F4 plastics, furnace temperature is about 380 ℃.

Claims (1)

1. A kind of fluorine plastic product, be made up of inside and outside fluoroplastic layer and metal net, wire netting is placed between the inside and outside fluoroplastic layer, and the grid that it is characterized in that described metal net is a diamond shaped, be made of wire and wire, wire and wire are the activity cross link.

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