WO2016162677A1 - Dispositif de fermeture de vanne - Google Patents

Dispositif de fermeture de vanne Download PDF

Info

Publication number
WO2016162677A1
WO2016162677A1 PCT/GB2016/050976 GB2016050976W WO2016162677A1 WO 2016162677 A1 WO2016162677 A1 WO 2016162677A1 GB 2016050976 W GB2016050976 W GB 2016050976W WO 2016162677 A1 WO2016162677 A1 WO 2016162677A1
Authority
WO
WIPO (PCT)
Prior art keywords
closure member
valve closure
valve
member according
bushes
Prior art date
Application number
PCT/GB2016/050976
Other languages
English (en)
Inventor
Martin CHISHOLM
Original Assignee
Schenck Process Limited
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 Schenck Process Limited filed Critical Schenck Process Limited
Publication of WO2016162677A1 publication Critical patent/WO2016162677A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/24—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with valve members that, on opening of the valve, are initially lifted from the seat and next are turned around an axis parallel to the seat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/34—Details
    • B65G53/40—Feeding or discharging devices
    • B65G53/46—Gates or sluices, e.g. rotary wheels
    • B65G53/4683—Gates or sluices, e.g. rotary wheels with a reciprocating mover acting directly on material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/34—Details
    • B65G53/40—Feeding or discharging devices
    • B65G53/46—Gates or sluices, e.g. rotary wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/52—Mechanical actuating means with crank, eccentric, or cam
    • F16K31/521—Mechanical actuating means with crank, eccentric, or cam comprising a pivoted disc or flap

Definitions

  • the present invention relates to a valve closure device. More particularly, the present invention relates to a valve closure device capable of opening and closing a valve for pneumatic conveying systems or similar bulk solid handling processes.
  • the conventional Dome Valve (Trade Mark) was invented in 1974 by Brian Snowdon. It consists of a dome shaped closure mounted on two half shafts that enable the dome shape closure to move through 90 degrees between the 'closed' and Opened' positions.
  • a moulded rubber seal is inflated using compressed gas so that the seal presses against the dome to form a gas tight seal.
  • the seal Prior to opening the valve the seal is deflated so that it retracts away from the dome allowing the dome to move freely without friction and the associated wear of the seal.
  • Dome Valve Trade Mark
  • the Dome Valve has become an industry standard and is frequently used as part of pneumatic conveying systems and similar applications where a valve is required to shut off a flow of bulk material solids and provide a pressure tight seal.
  • the conventional Dome Valve (Trade Mark) has been successfully used at pressures of up to 15 barg but the potential for the seal to extrude has prohibited its use at higher pressures. Furthermore, the possible sudden loss of sealing gas pressure and the consequent loss of containment make it unsuitable for high-pressure applications.
  • the conventional Dome Valve (Trade Mark) is well proven but the limitations are summarised as follows: 1) .
  • the maximum operating pressure is 20 barg. Above this pressure the inflating seal can extrude and fail.
  • the inflating seal can fail rapidly and unexpectedly when used at high- pressure since a small leak across the sealing face will quickly enlarge due to abrasive wear by high-velocity dust or the effects of temperature. It is an object of at least one aspect of the present invention to obviate or mitigate at least one or more of the aforementioned problems.
  • a valve closure device comprising:
  • a closure member connected to a first end of at least one substantially vertically oriented shaft
  • a second eccentric bush located around the first eccentric bush; wherein on counter-rotating the first and second eccentric bushes the closure member is capable of moving up and down.
  • valve closure device where a closure member is capable of being moved up and down to form a seal.
  • the closure device may be any suitable shape that is capable of forming a tight seal and being opened and closed.
  • the closure device may be dome shaped i.e. convex shaped.
  • the first eccentric bush may therefore form an inner bush with the second bush forming an outer bush with the first eccentric bush being wholly located within the second bush.
  • first and second bushes may have the same degree of eccentricity.
  • first and second eccentric bushes may be connect to the respective first eccentric bush which act as an inner bush with the second bushes located around the first bushes in the form of an outer bush.
  • the first end of the substantially vertically oriented shafts may be connected to the closure member.
  • the sealing ring may be annular in shape.
  • the sealing ring may therefore extend all the way around an upper part of a periphery of the closure member.
  • the sealing ring may be made from any suitable material such as ceramic and lapped hard metal faced, fully supported O-rings or quad rings in a metal housing.
  • the closure member may be moved from an open to a closed position. Preferably, this operation is performed with no or minimal friction and wear.
  • the movement of the closure member is in a straight line at right angles or substantially at right angles to the plane of the sealing ring. This ensures that the gap is closed equally and that the sealing force between the dome shaped closure and sealing ring is uniformly applied around the circumference of the seal.
  • the closure member may be moved to an upper position where the closure member forms a tight seal with the sealing ring.
  • the closure member may be opened by counter-rotating the first and second bushes which has the effect of lowering the closure member.
  • the closure member during this action may therefore be moved away from the seal which has the effect of opening the valve and allowing material to enter.
  • the closure member In a fully extended up positon, the closure member forms a tight seal against the sealing ring. In the fully lowered positon, the closure member is fully open and maximises the open gap between closure member and the sealing ring.
  • first and second (i.e. inner and outer) bushes may be rotated at equal speed in opposite directions.
  • the lateral movement of the inner bush may be offset by the equal and opposite lateral movement of the outer bush.
  • each pair of eccentric bushes may be synchronised by gearing to ensure that they counter- rotate at the same speed.
  • An external lay-shaft may ensure that the movement of the bushes on each side of the valve are synchronised.
  • a water-cooling system may also be incorporated into the valve closure device. This may allow the valve closure device to be used in high-temperature applications up to 800 degrees C.
  • valve closure device may be incorporated into a pneumatic conveying system or similar bulk solid handling processes where a valve is required to operate at high pressure and/or high temperature.
  • valve closure device may therefore be used as part of a pneumatic conveying system to provide effective cut-off and sealing at high pressure and/or temperature.
  • the valve closure device may provide material shut-off and sealing of valves to be used in a variety of applications. Typical examples are part of the fuel/sorbent feed to high-pressure gasifier and ash discharge valve from a high-pressure gasifier.
  • a pneumatic conveying apparatus or bulk solid handling apparatus comprising a valve closure device, said valve closure device comprising:
  • a closure member connected to a first end of at least one substantially vertically oriented shaft
  • the closure member is capable of moving up and down.
  • the valve closure device may be as defined in the first aspect.
  • a method of opening and closing a valve in a valve closure device comprising: providing a closure member connected to a first end of at least one substantially vertically oriented shaft;
  • the closure member is capable of moving up and down.
  • the valve closure device may be as defined in the first aspect.
  • Figure 1 is a sectional view of a prior art valve closure device in a closed position
  • Figure 2 is an expanded view of part of the valve closure device shown in Figure 1 ;
  • Figure 3 is a sectional of the valve closure device shown in Figures 1 and 2 in an open position
  • FIG. 4 is an expanded view of part of the valve closure device shown in Figure
  • Figures 5 to 10 represent the operation of a valve closure device according to an embodiment of the present invention where inner and outer bushes are rotating in opposite direction to provide upwards and downwards movement of a dome shaped closure.
  • FIG. 1 is a sectional view of a prior art valve closure device generally designated 10.
  • the valve closure device 10 is what is known in the field as a Dome Valve (Trade Mark).
  • the valve closure device 10 as shown in Figure 1 has a dome shaped (i.e. convex shaped) closure 12 which is mounted on two half-shafts that enables the dome shaped closure 12 to rotate about pivot points 16.
  • Figure 1 shows the valve closure device 10 in the closed position where the domed shaped closure 12 is pointing upwards and tightly sealed against inflatable moulded seals 14.
  • Figure 2 shows that the inflatable moulded seals 14 are capable of being inflated by air being injected through a seal inlet which has the effect of inflating the seal 14 against the dome shaped closure 12. This forms a tight seal.
  • FIGS 5 to 8 represent an improved valve closure device 100 according to the present invention.
  • the improved valve closure device 100 overcomes the limitations of the valve closure device 10 shown in Figures 1 to 4.
  • the improved valve closure device maintains the essential features of the original valve closure device and allows a dome shaped closure 1 10 and a sealing ring 1 18 to be brought into intimate contact when the domed shaped closure 1 10 is closed so that they form an effective seal.
  • the dome shaped closure 1 10 and sealing ring 1 18 Prior to opening the valve closure device 100, the dome shaped closure 1 10 and sealing ring 1 18 are moved apart to create a clearance so that the dome shaped closure 1 10 can move between the closed and opened positions without friction and wear.
  • FIG 5 there is a cross-section of the improved valve closure device 100 which uses a new method for moving the dome shaped closure 1 10.
  • To form an effective seal it is important that the movement of the dome shaped closure 110 is in a straight line at right angles to the plane of a sealing ring 1 18. This ensures that the gap is closed equally and that the sealing force between the dome shaped closure 1 10 and sealing ring 1 18 is uniformly applied around the circumference of the seal 1 18.
  • FIG 5 shows the dome shaped closure 1 10 in the most upwards position and tight against the sealing ring 1 18.
  • the sealing ring 118 extends all the way around the upper part of the periphery of the dome shaped closure 110.
  • the linear movement of the dome shaped closure 100 in an upwards direction is created by using two counter- rotating eccentric bushes 1 12, 1 14 as shown in Figures 5 to 8.
  • Both the inner and outer bushes 1 12, 1 14 have the same degree of eccentricity.
  • the inner and outer bushes 1 12, 1 14 bushes are rotated at equal speed in opposite directions.
  • the lateral movement of the inner bush 1 14 is offset by the equal and opposite lateral movement of the outer bush 1 12.
  • the movement of each pair of eccentric bushes 1 12, 114 is synchronised by gearing to ensure that they counter rotate at the same speed.
  • An external lay-shaft ensures that the movement of the bushes 1 12, 1 14 on each side of the valve are synchronised.
  • a further advantage of the design according to the present invention is that the pressure loads that act on the inside of the dome shaped closure 1 10 are carried by the sealing ring 1 18 rather than the half shafts. This pressure load increases the seating stress between the dome shaped closure 110 and the sealing ring 118 and so acts to improve the sealing.
  • This method of moving the dome shaped closure 110 into contact with the sealing ring 1 18 is intended to be used with a range of seal designs each suited to a different application.
  • Possible sealing ring 1 18 types include ceramic and lapped hard metal faced, fully supported O-rings or quad rings in a metal housing.
  • a water-cooling system can also be applied to the design of the improved valve closure device 100 allowing it to be used in high-temperature applications up to 800 degrees C.
  • the improved valve closure device 100 of the present invention can therefore be used as part of a pneumatic conveying system to provide effective cut-off and sealing at high pressure and/or temperature.
  • valves to be used in pneumatic conveying systems or similar bulk solid handling processes where a valve is required to operate at high pressure and/or high temperature.
  • Typical examples are part of a fuel/sorbent feed to high-pressure gasifier and ash discharge valve from a high- pressure gasifier.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)
  • Sliding Valves (AREA)

Abstract

L'invention concerne un dispositif de fermeture de vanne. L'invention concerne également un dispositif de fermeture de vanne capable d'ouvrir et de fermer une vanne destinée à des systèmes de transport pneumatiques ou des procédés de manipulation de solide en vrac similaires dans lesquels une vanne doit pouvoir fonctionner à haute pression et/ou à haute température.
PCT/GB2016/050976 2015-04-08 2016-04-07 Dispositif de fermeture de vanne WO2016162677A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1505924.9A GB2537134B (en) 2015-04-08 2015-04-08 Valve closure device for pneumatic conveying systems
GB1505924.9 2015-04-08

Publications (1)

Publication Number Publication Date
WO2016162677A1 true WO2016162677A1 (fr) 2016-10-13

Family

ID=53190285

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2016/050976 WO2016162677A1 (fr) 2015-04-08 2016-04-07 Dispositif de fermeture de vanne

Country Status (2)

Country Link
GB (1) GB2537134B (fr)
WO (1) WO2016162677A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107420559B (zh) * 2017-08-02 2024-04-02 上海鸿研物流技术有限公司 阀门
EP3680523B1 (fr) * 2019-01-14 2024-06-26 Illinois Tool Works Inc. Vanne
CN111434958A (zh) * 2019-01-14 2020-07-21 伊利诺斯工具制品有限公司 多通道阀
EP3680522B1 (fr) * 2019-01-14 2024-06-12 Illinois Tool Works, Inc. Vanne
GB2581849B (en) * 2019-03-01 2023-06-28 Schenck Process Europe Gmbh Valve with pressure seal protection

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL98229C (fr) *
US1904467A (en) * 1928-10-02 1933-04-18 Karnath Kurt Valve
US3272223A (en) * 1963-06-12 1966-09-13 Ind Co Kleinewefers Konst Rotatable shutter valve
WO2013096765A2 (fr) * 2011-12-23 2013-06-27 Dow Corning Corporation Composant industriel comprenant un alliage eutectique de silicium et procédé de fabrication du composant
CN103708232A (zh) * 2012-10-05 2014-04-09 江苏神通阀门股份有限公司 一种无摩擦长寿命圆顶阀

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201013951Y (zh) * 2007-03-27 2008-01-30 铜川市兰德尔环保科技有限公司 一种同步气动圆顶阀

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL98229C (fr) *
US1904467A (en) * 1928-10-02 1933-04-18 Karnath Kurt Valve
US3272223A (en) * 1963-06-12 1966-09-13 Ind Co Kleinewefers Konst Rotatable shutter valve
WO2013096765A2 (fr) * 2011-12-23 2013-06-27 Dow Corning Corporation Composant industriel comprenant un alliage eutectique de silicium et procédé de fabrication du composant
CN103708232A (zh) * 2012-10-05 2014-04-09 江苏神通阀门股份有限公司 一种无摩擦长寿命圆顶阀

Also Published As

Publication number Publication date
GB2537134A (en) 2016-10-12
GB2537134B (en) 2017-05-10
GB201505924D0 (en) 2015-05-20

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