CN201554934U - High-temperature and high-pressure resistant filling material - Google Patents

Abstract

The utility model relates to a high-temperature and high-pressure resistant filling material. The high-temperature and high-pressure resistant filling material comprises a high-temperature resistant lubrication coating (1), a filling material line (2), a steel wire (3), and the filling material (4), wherein the high-temperature resistant lubrication coating (1) is arranged on the circumferential outer surface of the filling material line (2); and the steel wire (3) is arranged in the filling material line (2). The utility model realizes the purposes of high-temperature and high-pressure resistance, low cost, and wide application range.

Description

A kind of high temperature resistant, high pressure filler

Technical field:

The utility model relates to a kind of high temperature resistant, high pressure filler.

Background technique:

At present, having the filler line that the stuffing box packing in the valve of high-temperature high-pressure medium (temperature is more than 500 ℃, more than the pressure 10MPA) adopts in petrochemical industry, thermoelectricity etc. is following two kinds: Expanded graphite line and pyrographite line.The filler of above-mentioned two kinds of filler lines establishment moulding is existing some defective in varying degrees: 1, above-mentioned two filler lines only are the high-carbon graphite powder to be affixed with rubber bond at whole filler external surface behind knitting forming, every sub-thread filler line does not then have coating, thereby exist high temperature resistant, high-voltage performance is poor, in temperature more than 50 ℃, under the operating conditions more than the pressure 10MPA, after using a period of time, often leak; 2, the goods of Expanded graphite line have some weakness: (1) allows serviceability temperature and working pressure to be reduced to normal value about 50% in Oxidant, and service condition is restricted; (2) though in non-oxidative medium when using when reaching 500 ℃ temperature vector up to more than 8%, reduction of service life and cause the pressure stress minimizing greatly, thus sew; (3) this mechanical strength is low, and frangible during filling, tensile strength is little, and filler also is difficult to cleaning during replacing.3, Xs550 (Cu) super heated rubber asbestos steel wire packing is a highest high temperature resistant asbestos packing in the present asbestos product.It is high-carbon graphite to be affixed with rubber bond at the packing outer surface behind knitting forming by common high temperature 550 asbestos yarns (or the parallel copper wire of asbestos yarn), and to play sealing and lubricated effect, its physical index is as follows:

Density 1.1g/cm ³Index

Allow pressure medium Pg (max)＜8MPA

Allow medium temperature T (max)＜550 degree

Pyrographite line Applicable media: water vapour

Heatproof vector (550 degree): 10%

From These parameters as can be seen, the heatproof vector is up to 10% when 550 spend for the rubber asbestos packing, and promptly its linear shrinkage amount of the filler of 10 * 10mm will be shunk 20mm up to the 1mm cross section ², be total sectional area 100mm ²20%.Certainly will cause leakage.And, only be 8MPA because of allowing pressure medium, can not satisfy oil refining and ethylene unit medium power boiler far away, the pyrolysis furnace equitemperature surpasses 500 degree, and pressure is above the air-proof condition at the sealing positions such as valve of 10MPA.Since the seventies, China is successively from external several 300,000 tons of ethylene units of having introduced, and its pyrolysis furnace and utility boiler pressure surpass 10MPA, and temperature is above 500 ℃.Under above-mentioned operating conditions, still there is not appropriate filler, to satisfy its requirement.

The model utility content:

The purpose of this utility model provides a kind of high temperature resistant, high pressure filler, and it adopts every or per share filler line circumference coating, and adopts the diaphragm cloth yarn, has realized high temperature resistant, high pressure, cost purpose low, applied widely.

In order to solve the existing problem of background technique, the utility model is by the following technical solutions: it comprises high temperature resistant lubricant coating 1, filler line 2, steel wire 3 and filler 4; High temperature resistant lubricant coating 1 is arranged on the circumferential outer surface of filler line 2, and steel wire 3 is arranged on the inside of filler line 2.

Filler line 2 adopts length of staple to reach the diaphragm cloth dedicated fiber of 4-10mm, does not add auxiliary cotton and other fibers during spinning, adds steel wire 3 when three strands of yarns are twisted and plied; Become the thick shape body of 200 order plumbagos of the wire drawing aquadag+carbon content 95% of carbon content 19% behind the line, the circumference of line evenly is coated with the high temperature resistant lubricant coating 1 of last layer, its thickness is in 0.05-0.2mm.Through the braiding of punching 24 ingot knitting machines, is finished product with this line after the integer; Also available this line forms finished product through the jacket layer braiding.

The utlity model has following beneficial effect: owing to scribble high temperature resistant lubricating layer on the surface of per share filler line or every filler line, make filler in the time of 600 ℃, still have excellent lubrication, friction factor only is 0.12, abrasion loss only is 0.04 gram, show by test, do not produce surface breakdown through the to-and-fro motion of 500 simulation valve rods.And during actual the use, about 1-5 time of annual switch of each valve, promptly this filler can use more than 10 years continuously; Connect together owing to adopt the special-purpose long fibre of diaphragm cloth and twist closely with the mode of twisting, have advantages of higher tensile strength after making line, the results showed that reach 30.1MPA, working pressure can reach 18MPA with nickel-cadmium silk that can be high temperature resistant; Its compressibility of this filler reaches 28%, rebound degree 27%, the compression rebound rate requirement of giving common packing fully; Applicable scope is extensive, is water vapour to medium, and various oils, weak acid, weak base etc. are all applicable; Allow 600 ℃ of maximum operation (service) temperatures, maximum pressure 18MPA compares with existing filler and to increase substantially; Owing to select the diaphragm cloth yarn for use, cost reduces significantly than external filler.

Description of drawings:

Fig. 1 is the structural representation of the utility model jacket layer braiding finished product;

Fig. 2 is the structural representation of the utility model punching braiding finished product;

Fig. 3 is the general filler line of a utility model cross section amplification view.

Embodiment:

Embodiment one: referring to Fig. 1-3, this embodiment by the following technical solutions: it comprises high temperature resistant lubricant coating 1, filler line 2, steel wire 3 and filler 4; High temperature resistant lubricant coating 1 is arranged on the circumferential outer surface of filler line 2, and steel wire 3 is arranged on the inside of filler line 2.

Filler line 2 adopts length of staple to reach the diaphragm cloth dedicated fiber of 4-10mm, does not add auxiliary cotton and other fibers during spinning, adds steel wire 3 when three strands of yarns are twisted and plied; Become the thick shape body of 200 order plumbagos of the wire drawing aquadag+carbon content 95% of carbon content 19% behind the line, the circumference of line evenly is coated with the high temperature resistant lubricant coating 1 of last layer, its thickness is in 0.05-0.2mm.Through the braiding of punching 24 ingot knitting machines, is the finished product (see figure 2) with this line after the integer.Also available this line forms the finished product (see figure 1) through the jacket layer braiding.

This embodiment is owing to scribble high temperature resistant lubricating layer on the surface of per share filler line or every filler line, make filler in the time of 600 ℃, still have excellent lubrication, friction factor only is 0.12, abrasion loss only is 0.04 gram, show by test, do not produce surface breakdown through the to-and-fro motion of 500 simulation valve rods.And during actual the use, about 1-5 time of annual switch of each valve, promptly this filler can use more than 10 years continuously; Connect together owing to adopt the special-purpose long fibre of diaphragm cloth and twist closely with the mode of twisting, have advantages of higher tensile strength after making line, the results showed that reach 30.1MPA, working pressure can reach 18MPA with nickel-cadmium silk that can be high temperature resistant; Its compressibility of this filler reaches 28%, rebound degree 27%, the compression rebound rate requirement of giving common packing fully; Applicable scope is extensive, is water vapour to medium, and various oils, weak acid, weak base etc. are all applicable; Allow 600 ℃ of maximum operation (service) temperatures, maximum pressure 18MPA compares with existing filler and to increase substantially; Owing to select the diaphragm cloth yarn for use, cost reduces significantly than external filler.

Embodiment two: be that with embodiment one difference the thick shape body of described plumbago can also be the MuS2 fire-resistant lubricants.

Claims (3)

1. high temperature resistant, a high pressure filler is characterized in that it comprises high temperature resistant lubricant coating (1), filler line (2), steel wire (3) and filler (4); High temperature resistant lubricant coating (1) is arranged on the circumferential outer surface of filler line (2), and steel wire (3) is arranged on the inside of filler line (2).

2. a kind of high temperature resistant, high pressure filler according to claim 1 is characterized in that described filler line (2) adopts length of staple to reach the diaphragm cloth dedicated fiber of 4-10mm, has steel wire (3) in the per share filler line (2).

3. a kind of high temperature resistant, high pressure filler according to claim 1 is characterized in that described high temperature resistant lubricant coating thickness range 0.05-0.20mm.

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