[go: up one dir, main page]

GB2086254A - Vibratory Screen for Vibratory Screening Apparatus - Google Patents

Vibratory Screen for Vibratory Screening Apparatus Download PDF

Info

Publication number
GB2086254A
GB2086254A GB8132018A GB8132018A GB2086254A GB 2086254 A GB2086254 A GB 2086254A GB 8132018 A GB8132018 A GB 8132018A GB 8132018 A GB8132018 A GB 8132018A GB 2086254 A GB2086254 A GB 2086254A
Authority
GB
United Kingdom
Prior art keywords
screen
polyaramide
polyester
mesh
fibre yarn
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB8132018A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HARPSOUND Ltd
Original Assignee
HARPSOUND Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HARPSOUND Ltd filed Critical HARPSOUND Ltd
Publication of GB2086254A publication Critical patent/GB2086254A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/36—Cored or coated yarns or threads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/4618—Manufacturing of screening surfaces
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
    • D02G3/447—Yarns or threads for specific use in general industrial applications, e.g. as filters or reinforcement
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
    • D03D15/497—Knitted threads
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
    • D10B2331/021—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides aromatic polyamides, e.g. aramides
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Combined Means For Separation Of Solids (AREA)

Abstract

A screen for vibratory screening apparatus comprises a woven mesh of polyaramide yarn preferably enveloped in a sheathing of polyester, which is applied by braiding or winding polyester fibres round the yarn and then fusing them to form a continuous sheathing.

Description

SPECIFICATION Vibratory Screen for Vibratory Screening Apparatus This invention relates to vibratory screens for vibratory screening apparatus, and vibratory screening apparatus comprising them.
Vibratory screening apparatus is well known and is used in many applications including in particular earth drilling and mining operations.
One such application is in the screening of drill cuttings from subterranean and submarine drilling operations for the recovery of the drilling fluid and separation of the drill cutting. Typically such apparatus comprise a wire mesh screen, usually of stainless steel, mounted in a frame mounted for reciprocating movement on a base, and provided with eccentric means for reciprocating or vibrating the screen.
Depending on the materials being screened, the mesh and wire size of the screen itself, the frequency and amplitude of vibration, the life of stainless steel mesh screens used in the mining and oil drilling industries may be anything from a few hours to a few weeks, but rarely in excess of 6 or 7 weeks. This, of course, represents a considerable disadvantage both in terms of cost of replacement and shut-down time of the screening unit.
According to the invention a screen is provided for a vibratory screening unit having a substantially greater life than a conventional stainless steel mesh screen, such a screen comprising as the screening surface a woven mesh of polyaramide filaments or fibres which are preferably enveloped in a protective sheath of polyester. In addition to having a substantially longer working life, the polyaramide screens of the invention are much lighter in weight than stainless steel screens and therefore much more economic in terms of transportation and operation and operation e.g. power, costs.
High strength, high modulus polyaramide (aromatic polyamide) spun fibre yarns have recently been developed and are available from du Pont under the Registered Trade Mark: Kevlar, e.g. Kevlar 29 and Kevlar 49. Woven screens of such polyaramide fibre yarns, such as are proposed within the broad scope of this excess of that provided by an equivalent mesh stainless steel wire screen, but are subject to some disadvantage in that the polyaramide fibre yarns are subject to flattening in use with consequent variation in the dimensions of the mesh opening.
Accordingly in a further and preferred aspect of the present invention, the polyaramide filaments or fibre yarns of the woven mesh are enveloped in a protective sheath of polyester e.g. polyethylene terephthalate. This may be in the form of a continuous polyester sheath around the polyaramide filament or fibre yarn but is preferably in the form of a spun polyester fibre yarn, e.g. that sold under the Registered Trade Mark Dacron, wrapped around the polyaramide filament fibre yarn and forming a wound or braided outer casing thereon. More preferably, after winding or braiding around the polyaramide filament or fibre yarn, the polyester is heated to fuse the polyester to the surface of the polyaramide.
Claims
1. A screen for use in vibratory screening apparatus comprising as the screening surfacea woven mesh of aromatic polyamide filament or fibre yarn.
2. A screen according to claim 1 , wherein the screening surface is a woven mesh of a spun aromatic polyamide fibre yarn.
3. A screen according to claim 1 or 2, wherein the aromatic polyamide filaments or fibre yarn forming said woven mesh is or are enveloped in a protective sheathing of polyester.
4. A screen according to Claim 3, wherein said protective sheathing is formed by a spun polyester fibre yarn wound or braided around the aromatic polyamide filament or fibre yarn.
5. A screen according to Claim 4, wherein, after winding or braiding, the wound or braided polyester fibre yarn forming said protective sheath around the aromatic polyamide filament or yarn is heated to form a fused polyester sheath.
6. A vibratory screening unit incorporating a screen as claimed in any of the preceding claims.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (6)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Vibratory Screen for Vibratory Screening Apparatus This invention relates to vibratory screens for vibratory screening apparatus, and vibratory screening apparatus comprising them. Vibratory screening apparatus is well known and is used in many applications including in particular earth drilling and mining operations. One such application is in the screening of drill cuttings from subterranean and submarine drilling operations for the recovery of the drilling fluid and separation of the drill cutting. Typically such apparatus comprise a wire mesh screen, usually of stainless steel, mounted in a frame mounted for reciprocating movement on a base, and provided with eccentric means for reciprocating or vibrating the screen. Depending on the materials being screened, the mesh and wire size of the screen itself, the frequency and amplitude of vibration, the life of stainless steel mesh screens used in the mining and oil drilling industries may be anything from a few hours to a few weeks, but rarely in excess of 6 or 7 weeks. This, of course, represents a considerable disadvantage both in terms of cost of replacement and shut-down time of the screening unit. According to the invention a screen is provided for a vibratory screening unit having a substantially greater life than a conventional stainless steel mesh screen, such a screen comprising as the screening surface a woven mesh of polyaramide filaments or fibres which are preferably enveloped in a protective sheath of polyester. In addition to having a substantially longer working life, the polyaramide screens of the invention are much lighter in weight than stainless steel screens and therefore much more economic in terms of transportation and operation and operation e.g. power, costs. High strength, high modulus polyaramide (aromatic polyamide) spun fibre yarns have recently been developed and are available from du Pont under the Registered Trade Mark: Kevlar, e.g. Kevlar 29 and Kevlar 49. Woven screens of such polyaramide fibre yarns, such as are proposed within the broad scope of this excess of that provided by an equivalent mesh stainless steel wire screen, but are subject to some disadvantage in that the polyaramide fibre yarns are subject to flattening in use with consequent variation in the dimensions of the mesh opening. Accordingly in a further and preferred aspect of the present invention, the polyaramide filaments or fibre yarns of the woven mesh are enveloped in a protective sheath of polyester e.g. polyethylene terephthalate. This may be in the form of a continuous polyester sheath around the polyaramide filament or fibre yarn but is preferably in the form of a spun polyester fibre yarn, e.g. that sold under the Registered Trade Mark Dacron, wrapped around the polyaramide filament fibre yarn and forming a wound or braided outer casing thereon. More preferably, after winding or braiding around the polyaramide filament or fibre yarn, the polyester is heated to fuse the polyester to the surface of the polyaramide. Claims
1. A screen for use in vibratory screening apparatus comprising as the screening surfacea woven mesh of aromatic polyamide filament or fibre yarn.
2. A screen according to claim 1 , wherein the screening surface is a woven mesh of a spun aromatic polyamide fibre yarn.
3. A screen according to claim 1 or 2, wherein the aromatic polyamide filaments or fibre yarn forming said woven mesh is or are enveloped in a protective sheathing of polyester.
4. A screen according to Claim 3, wherein said protective sheathing is formed by a spun polyester fibre yarn wound or braided around the aromatic polyamide filament or fibre yarn.
5. A screen according to Claim 4, wherein, after winding or braiding, the wound or braided polyester fibre yarn forming said protective sheath around the aromatic polyamide filament or yarn is heated to form a fused polyester sheath.
6. A vibratory screening unit incorporating a screen as claimed in any of the preceding claims.
GB8132018A 1980-10-28 1981-10-23 Vibratory Screen for Vibratory Screening Apparatus Withdrawn GB2086254A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8034693 1980-10-28

Publications (1)

Publication Number Publication Date
GB2086254A true GB2086254A (en) 1982-05-12

Family

ID=10516934

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8132018A Withdrawn GB2086254A (en) 1980-10-28 1981-10-23 Vibratory Screen for Vibratory Screening Apparatus

Country Status (1)

Country Link
GB (1) GB2086254A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4312174A1 (en) * 1993-04-14 1994-10-20 Wuertt Filztuchfab Dryer screen for paper machine
US6880612B2 (en) * 2002-02-06 2005-04-19 Andersen Corporation Reduced visibility insect screen
US8042598B2 (en) 2002-02-06 2011-10-25 Andersen Corporation Reduced visibility insect screen
US8215385B2 (en) * 2003-05-15 2012-07-10 Cooke Jr Claude E Application of degradable polymers in sand control
WO2019183697A3 (en) * 2018-03-27 2020-02-06 Blue Ocean Engenharia Ltda Mining sifter, screen mounted on a mining sifter, mining system and method for controlling a mining sifter

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4312174A1 (en) * 1993-04-14 1994-10-20 Wuertt Filztuchfab Dryer screen for paper machine
US5609936A (en) * 1993-04-14 1997-03-11 Wurttembergische Filztuchfabrik D. Geschmay Gmbh Drying screen for paper making machine
US6880612B2 (en) * 2002-02-06 2005-04-19 Andersen Corporation Reduced visibility insect screen
US8042598B2 (en) 2002-02-06 2011-10-25 Andersen Corporation Reduced visibility insect screen
US8215385B2 (en) * 2003-05-15 2012-07-10 Cooke Jr Claude E Application of degradable polymers in sand control
USRE45950E1 (en) * 2003-05-15 2016-03-29 Claude E. Cooke, Jr. Application of degradable polymers in sand control
WO2019183697A3 (en) * 2018-03-27 2020-02-06 Blue Ocean Engenharia Ltda Mining sifter, screen mounted on a mining sifter, mining system and method for controlling a mining sifter
US11717856B2 (en) 2018-03-27 2023-08-08 Blue Ocean Engenharia Ltda Mining screen, screen panel applied on mining screen, mining system, and control method for mining screen

Similar Documents

Publication Publication Date Title
AU2018385284B2 (en) Securing cable for securing movable objects
AU2002251308B2 (en) Screen material
GB2086254A (en) Vibratory Screen for Vibratory Screening Apparatus
US7065949B2 (en) Cut-resistant yarn intended especially for the production of protective garments
JP6907185B2 (en) Woven tubular heat sleeve and its manufacturing method
NO173250B (en) CABLE WITH THE FIBER CORE
US5425985A (en) Belt construction having a mock leno fabric as an impact breaker or splice insert
CN107849758A (en) Transparent anti-end wear and the textile sleeve and construction method of anti-EMI filter
CA1174916A (en) Glass fibre yarns and other goods, and method of manufacture
US6132872A (en) Lightweight abrasion resistant braiding
AU744413B2 (en) Filter medium
JPS63126930A (en) Structure of cord
KR940003020B1 (en) Packing
GB2243883A (en) Braided sealing cord
US2866483A (en) Textile materials for power transmission and conveyor belting
KR20010006252A (en) Method of making a reinforcing fabric for power transmission belts
EP0250826B1 (en) Cut resistant jacket for ropes, webbing, straps, inflatables and the like
EA007051B1 (en) Fabric reinforcement with unidirectional reinforcement, which can be attached to a mechanical structure that is to be reinforced
US559080A (en) Samuel hughes
US478941A (en) Woven fabric for machine-belting
PL172209B1 (en) Method of making tubular articles from fibre reinforced synthetic resins adapted to be telescopically engaged with each other in controllable manner to obtain a collapsible angle rod and articles obtained thereby
EP0446389B1 (en) Multi-layer filter cartridge
JP2884078B2 (en) Packing
GB2149048A (en) Lay-flat hose
Coskren et al. Kevlar 29 parachute fabrics

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)