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GB2505635A - Valve guard retention device - Google Patents

Valve guard retention device Download PDF

Info

Publication number
GB2505635A
GB2505635A GB1208765.6A GB201208765A GB2505635A GB 2505635 A GB2505635 A GB 2505635A GB 201208765 A GB201208765 A GB 201208765A GB 2505635 A GB2505635 A GB 2505635A
Authority
GB
United Kingdom
Prior art keywords
retention device
valve guard
cylinder
valve
securing
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Withdrawn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
GB1208765.6A
Other versions
GB201208765D0 (en
Inventor
Wolfgang Dorner
Duncan Wales
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.)
Linde GmbH
Original Assignee
Linde GmbH
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 Linde GmbH filed Critical Linde GmbH
Priority to GB1208765.6A priority Critical patent/GB2505635A/en
Publication of GB201208765D0 publication Critical patent/GB201208765D0/en
Priority to CA2815873A priority patent/CA2815873A1/en
Priority to EP13168084.5A priority patent/EP2664839A3/en
Publication of GB2505635A publication Critical patent/GB2505635A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/005—Details of vessels or of the filling or discharging of vessels for medium-size and small storage vessels not under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
    • F17C13/123—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures for gas bottles, cylinders or reservoirs for tank vehicles or for railway tank wagons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/056—Small (<1 m3)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/058—Size portable (<30 l)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0153—Details of mounting arrangements
    • F17C2205/0157—Details of mounting arrangements for transport
    • F17C2205/0165—Details of mounting arrangements for transport with handgrip
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0308—Protective caps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0329—Valves manually actuated

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Compressor (AREA)

Abstract

A device 30 for retaining a valve guard 20 on a cylinder 2. The device 30 comprises an interface feature which is arranged to couple with a retention feature of an associated cylinder valve assembly 10 thereby preventing uncontrolled separation of the retention device 30 from the cylinder 2. The retention device 30 may be connected to the neck ring 4 of a gas cylinder 2 and may be a separate component or integral with the valve guard 20. The interference feature may be annular. The retention device 30 may feature a split and may be secured to the cylinder 2 using a securing bolt.

Description

Valve Guard Retention Device The present invention relates to a retention device for retaining a valve guard on a gas cylinder in the event of a failure of the connection between the valve guard and cylinder.
Valve guards which attach to the neck rings of gas cylinders are well known in the art. Such valve guards substantially surround the valve assembly of the gas cylinder and prevent valve damage in the event that the cylinder is dropped or knocked over, for example during transportation. Valve guards have traditionally been designed to protect the valve assembly from impact loads and have subsequently been designed to withstand compressive rather than tensile loads.
In recent years it has become commonplace to move gas cylinders by r o crane. This is often done by direct attachment of the crane to the valve guard.
However, this can be hazardous as the valve guard is not intended to be used (\J in this way, and neither the valve guard, nor its connection to the neck ring, are designed to withstand the tensile loads generated during craning. There is therefore a risk that gas cylinders may be dropped and damaged during craning.
It is generally accepted that the most likely point of failure during craning from the valve guard is the interface between the neck ring and gas cylinder. It has therefore been known to crane gas cylinders directly from the valve assembly which has a more robust threaded connection into the top of the gas cylinder. However, this practice is not desirable as it may cause damage to the valve assembly.
In some territories it is common to use keeper plates to prevent the valve guard from separating from the gas cylinder in the event that the neck ring fails. Typically, a keeper plate has a central hole which surrounds the valve assembly underneath a flange in the valve body. The outer edge of the keeper plate sits atop an annular flange on the valve guard. By this arrangement, should the neck ring fail (for example during craning) the valve guard flange will abut the keeper plate which in turn abuts the flange in the valve body, thereby preventing separation of the valve guard from the cylinder.
The use of keeper plates has disadvantages since an extra item must be fitted to the gas cylinders during make-up, thereby reducing efficiency. In addition the fitter may neglect to fit the keeper plate.
The present invention provides a valve guard retention device which is arranged to be connected to a cylinder, the retention device comprising an interface feature which is arranged in use to couple with a retention feature of an associated cylinder valve assembly to prevent uncontrolled separation r.
o of the retention device from the cylinder.
(\J The valve guard retention device of the present invention is advantageous as it provides integral valve guard retention protection thereby allowing gas cylinders to be more safely craned from the valve guard.
Furthermore, because it is connected to the cylinder, it is less likely to be omitted during cylinder make-up.
Preferably, the valve guard retention device is arranged to be connected to the neck ring of a cylinder which provides a convenient attachment point.
In a preferred embodiment, the valve guard retention device is integral with the valve guard. In this case there is no possibility that the retention device can be omitted.
In an alternative preferred embodiment, the valve guard retention device is arranged to be connected to the valve guard. This is advantageous in that it provides another way in which the retention device forms an integral part of the valve guard system and thus reduces the possibility of its omission.
Indeed, in one embodiment of the invention described in detail below, it is not possible to attach the valve guard without the retention device in place.
Preferably, the valve guard retention device is arranged so that, when fitted, there is substantially no contact between the interface feature and the retention feature during normal operation of the cylinder (where normal operation of the cylinder is considered to be when there has been no failure of the connection between the valve guard and the cylinder). This feature facilitates fitting of the retention device to the valve assembly by providing sufficient play between the parts. r
o The interface feature preferably has substantially annular form for simplicity and ease of manufacture. (4
In a preferred embodiment, the valve guard retention device comprises securing means to facilitate secure fitting of the retention device to a cylinder.
In one embodiment, the securing means comprises a split which may extend through the entirety of the retention device, but which preferably extends only part way through the retention device in order to reduce part count and retain part strength and integrity.
The valve guard retention device preferably further comprises a securing feature arranged, in use, to couple with a securing device to facilitate secure fitting of the retention device to a cylinder. The securing feature preferably comprises a bolt hole for receiving a securing bolt, thereby allowing the use of readily available parts and tools.
In another aspect, the present invention provides a valve guard assembly comprising a valve guard retention device as described above and at least one securing device for securing the valve guard retention device to a cylinder. The securing device preferably comprises a bolt.
In a further aspect, the present invention provides a method of securing a valve guard retention device to a cylinder, the method comprising: providing a valve guard retention device as described above; and attaching the valve guard retention device to the cylinder.
The above method preferably further comprises attaching a valve guard to the valve guard retention device.
An example of the invention will now be described with reference to the following Figures in which: r o Figure 1 is a side view of a gas cylinder assembly; Figure 2 is a sectional view of the assembly of Figure 1 taken along (\,j line A-A; Figure 3 is an isometric view of a valve guard retention device; Figure 4 is a sectional plan view of the valve guard retention device of Figure 3; and Figure 5 is a sectional view of the assembly of Figure 1 taken along line B-B.
Figure 1 shows the top section of a gas cylinder assembly 1 comprising a cylinder 2, a valve assembly 10 and a valve guard 20. As can be seen more clearly in Figure 2, the valve assembly 10 is connected to the cylinder 2 via a threaded connection 3, and the valve guard 20 is connected to the cylinder 2 via cylinder neck ring 4 and valve guard retention device 30.
The valve guard 20 comprises a churning knob 21 and openings 27.
During craning, the crane may be attached to the valve guard 20 by the churning knob 21 or, more preferably, by passing a strop through the openings 27. In an alternative embodiment (not shown), the valve guard 20 may alternatively or additionally comprise a crane attachment point.
The valve guard 20 comprises a connection ring 22 which attaches to the retention device 30 via a threaded connection 25. As can be seen in Figure 5, the connection ring 22 comprises a split 26. Bolt connection lugs 23 are located at either side of the split 26. As shown in Figure 1, when fitted, a bolt 24 passes through the bolt connection lugs 23 to tighten and secure the valve guard 20 to the retention device 30. The bolt is tightened and secured by means of a nut.
Referring now to Figures 3 and 4, the retention device 30 comprises side-wall portion 31 having an outer threaded surface 33 and an inner threaded surface 34. The retention device 30 further comprises disc portion r. . o 32 having an interface hole 35 located substantially at its centre. The retention device 30 further comprises a split 36 and bolt hole 37. (4
As shown in Figure 2, the retention device 30 is attached to the neck ring 4 of the cylinder 2 via threaded connection 38. A bolt (not shown) is inserted into bolt hole 37 and tightened to secure the retention device 30 to the neck ring 4.
The valve assembly 10 comprises a retention flange 11 located above the threaded connection 3. The outer diameter of the retention flange 11 is greater than the diameter of the interface hole 35, such that, in use, should the neck ring fail at its connection 5 with the cylinder 2, the valve guard will be prevented from separating from the cylinder 2 since the upper surface of the retention device 30 will abut the lower surface of the retention flange 11.
In the example described above the diameter of the interface hole 35 is greater than the diameter of the valve assembly 10 below the retention flange 11. Thus, the retention device 30 does not contact the valve assembly 10 during normal operation of the cylinder assembly 1 (where normal operation of the cylinder assembly is considered to be when there has been no failure of the connection between the valve guard and the cylinder). This size difference facilitates placement of the retention device 30 around the valve assembly 10 during make-up of the cylinder assembly 1. However, this is not an essential feature and the components may touch during normal operation of the cylinder if desired.
The valve guard 20 and retention device 30 described above comprise splits 26 and 36 for facilitating the securing of these components to the cylinder 2. In an alternative example, the valve guard 20 or retention device may comprise no splits. In another possible embodiment (not shown), one or both of the valve guard 20 and/or retention device 30 may be wholly split into two or more pieces which may be connected together via bolts or the like r. . . o during assembly. In embodiments having only a partial split 26, 36, or no split, it is not possible to remove the valve guard 20 or retention device 30 (\J when the valve assembly 10 is in place on the cylinder 2. This is advantageous as it provides a greater level of security. However, it may be advantageous for the valve guard 20 or retention device 30 to be removable when the valve assembly 10 is in place. In this case the wholly split versions may be used.
In another embodiment (not shown) the valve guard retention device may be integral with the valve guard. In this case the valve guard may be separable into two or more pieces. However, a valve guard with an integral retention device and partial split (such as split 26, 36 described above) is preferred. Alternatively, the valve guard with integral retention device may comprise no splits.
The method of retention described above is abutment of the upper surface of the retention device 30 with the lower surface of the valve flange 11. In alternative embodiments (not shown) other retention methods may be used such as dowels which extend from the side wall 31 of the retention device 30 and engage with corresponding receiving holes in the valve body, or a retention ring connected to the side wall 31 of the retention device by dowels or the like, and which abuts the underside of the valve flange 11 in the event of neck ring failure. In a further alternative embodiment, the valve guard retention device may be integral with, or affixed to, the valve body. r (4

Claims (15)

  1. Claims: 1. A valve guard retention device which is arranged to be connected to a cylinder, the retention device comprising an interface feature which is arranged, in use, to couple with a retention feature of an associated cylinder valve assembly to prevent uncontrolled separation of the retention device from the cylinder.
  2. 2. A valve guard retention device as claimed in claim 1, wherein the retention device is arranged to be connected to the neck ring of a cylinder.
  3. 3. A valve guard retention device as claimed in claim 1 or 2, wherein the retention device is integral with a valve guard.
  4. 4. A valve guard retention device as claimed in claim 1 or 2, wherein the r o retention device is arranged to be connected to a valve guard.
    (\,j
  5. 5. A valve guard retention device as claimed in any preceding claim, wherein the interface feature is arranged so that, during normal cylinder operation, there is substantially no contact between the interface feature and the retention feature.
  6. 6. A valve guard retention device as claimed in any preceding claim, wherein the interface feature has substantially annular form.
  7. 7. A valve guard retention device as claimed in any preceding claim, wherein the retention device comprises securing means to facilitating secure fitting of the retention device to a cylinder.
  8. 8. A valve guard retention device as claimed in claim 7, wherein the securing means comprises a split.
  9. 9. A valve guard retention device as claimed in any preceding claim, the retention device further comprising a securing feature arranged, in use, to couple with a securing device to facilitate secure fitting of the retention device to a cylinder.
  10. 10. A valve guard retention device as claimed in claim 9, wherein the securing feature comprises a bolt hole for receiving a securing bolt.
  11. 11. A valve guard assembly comprising a valve guard retention device as claimed in any preceding claim and at least one securing device for securing the valve guard retention device to a cylinder.
  12. 12. A valve guard assembly as claimed in claim ii wherein the securing device comprises a bolt. r. .o
  13. 13. A method of securing a valve guard retention device to a cylinder, the method comprising: (\J providing a valve guard retention device as claimed in any one of claims ito 10; and attaching the valve guard retention device to the cylinder.
  14. 14. A method as claimed in claim 13, when dependent on any one of claims ito 2 or 3 to 10, further comprising attaching a valve guard to the valve guard retention device.
  15. 15. A valve guard retention device substantially as described herein with reference to Figures i to 5.
GB1208765.6A 2012-05-17 2012-05-17 Valve guard retention device Withdrawn GB2505635A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB1208765.6A GB2505635A (en) 2012-05-17 2012-05-17 Valve guard retention device
CA2815873A CA2815873A1 (en) 2012-05-17 2013-05-15 Valve guard retention device
EP13168084.5A EP2664839A3 (en) 2012-05-17 2013-05-16 Valve guard retention device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1208765.6A GB2505635A (en) 2012-05-17 2012-05-17 Valve guard retention device

Publications (2)

Publication Number Publication Date
GB201208765D0 GB201208765D0 (en) 2012-07-04
GB2505635A true GB2505635A (en) 2014-03-12

Family

ID=46546286

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1208765.6A Withdrawn GB2505635A (en) 2012-05-17 2012-05-17 Valve guard retention device

Country Status (3)

Country Link
EP (1) EP2664839A3 (en)
CA (1) CA2815873A1 (en)
GB (1) GB2505635A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1421145A (en) * 1971-12-16 1976-01-14 Boc International Ltd Protective caps for use with compressed gas cylinders
US4103806A (en) * 1977-01-03 1978-08-01 White E Vernon Valve guard for protecting the regulator valve on a scuba tank
US4880134A (en) * 1988-07-01 1989-11-14 Wood Jr Theodore N Protective cap assembly
JPH08338593A (en) * 1995-06-14 1996-12-24 San Frontier Technol:Kk Common use device for valve protecting cap
DE19926961A1 (en) * 1999-06-14 2001-01-25 Josef Haberthaler Protective cap for the valve of a gas pressure bottle for welding has a shrouding wall held by a release lock at the bottle neck for effective valve protection with easy fitting and removal
DE10308676A1 (en) * 2003-02-28 2004-09-09 Adam Opel Ag Protective cap for gas valve on pressure gas bottle for use in road vehicle has two separate half-shells with openings, held together by cap at top and ring at bottom
CN201599560U (en) * 2009-11-27 2010-10-06 卓文仁 Protecting cover device for gas cylinder valve

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2791757B1 (en) * 1999-04-01 2001-06-15 Air Liquide COMPOSITE OPEN HAT FROM LARGE INDUSTRIAL AND MEDICAL GAS BOTTLES
DE10146457B4 (en) * 2001-09-20 2006-11-30 Messer Cutting & Welding Gmbh Gas cylinder unit
FR2855244A1 (en) * 2003-05-19 2004-11-26 Air Liquide Wire cap for gas cylinder, has body forming internal volume and formed of tri-dimensional structure with various wires that are elongated in integral manner, and cavities dimensioned to allow passage of users hand
US7089956B1 (en) * 2003-11-14 2006-08-15 Gilbert Davidson Portable gas delivery device with impact protection
US8336577B2 (en) * 2008-04-23 2012-12-25 Praxair Technology, Inc. Pressurized gas containing system
DE202009017665U1 (en) * 2009-12-07 2010-05-12 Vetter Gmbh Safety device for compressed air bottles

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1421145A (en) * 1971-12-16 1976-01-14 Boc International Ltd Protective caps for use with compressed gas cylinders
US4103806A (en) * 1977-01-03 1978-08-01 White E Vernon Valve guard for protecting the regulator valve on a scuba tank
US4880134A (en) * 1988-07-01 1989-11-14 Wood Jr Theodore N Protective cap assembly
JPH08338593A (en) * 1995-06-14 1996-12-24 San Frontier Technol:Kk Common use device for valve protecting cap
DE19926961A1 (en) * 1999-06-14 2001-01-25 Josef Haberthaler Protective cap for the valve of a gas pressure bottle for welding has a shrouding wall held by a release lock at the bottle neck for effective valve protection with easy fitting and removal
DE10308676A1 (en) * 2003-02-28 2004-09-09 Adam Opel Ag Protective cap for gas valve on pressure gas bottle for use in road vehicle has two separate half-shells with openings, held together by cap at top and ring at bottom
CN201599560U (en) * 2009-11-27 2010-10-06 卓文仁 Protecting cover device for gas cylinder valve

Also Published As

Publication number Publication date
EP2664839A3 (en) 2017-07-26
GB201208765D0 (en) 2012-07-04
CA2815873A1 (en) 2013-11-17
EP2664839A2 (en) 2013-11-20

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