CA1214150A - Unloading valve for over-turned tank - Google Patents
Unloading valve for over-turned tankInfo
- Publication number
- CA1214150A CA1214150A CA000419953A CA419953A CA1214150A CA 1214150 A CA1214150 A CA 1214150A CA 000419953 A CA000419953 A CA 000419953A CA 419953 A CA419953 A CA 419953A CA 1214150 A CA1214150 A CA 1214150A
- Authority
- CA
- Canada
- Prior art keywords
- valve
- plate
- gate
- stem
- stop means
- 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.)
- Expired
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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/07—Construction of housing; Use of materials therefor of cutting-off parts of tanks, e.g. tank-cars
-
- 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/168—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side combined with manually-controlled valves, e.g. a valve combined with a safety valve
-
- 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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/04—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with pivoted closure members
- F16K3/10—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with pivoted closure members with special arrangements for separating the sealing faces or for pressing them together
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
TITLE
UNLOADING VALVE FOR OVER-TURNED TANK
INVENTOR
Evan Philip MARCH
ABSTRACT
The invention achieves a spring loaded, manually operated, flow and relief valve to be associated with each chamber of a tanker or tank. Preferably, the flow valve can be conviently and permanently mounted as a discharge orifice in the captive cover, or manhole cover, of such tanker, and conveniently located particularly in the annular margin between the radial. flange and a centrally located hingible disc closure of the manhole cover. Specifically, thevalve mechanism comprises a valve body carrying a valve controller;
and defining a first larger orifice; a gate, mounted for movement relative to the valve body and positioned to sealingly close and to open the forst larger orifice; and, means urging the gate into sealing, closing relation With the larger orifice, but responsive to the valve controller for positioning the gate open.
UNLOADING VALVE FOR OVER-TURNED TANK
INVENTOR
Evan Philip MARCH
ABSTRACT
The invention achieves a spring loaded, manually operated, flow and relief valve to be associated with each chamber of a tanker or tank. Preferably, the flow valve can be conviently and permanently mounted as a discharge orifice in the captive cover, or manhole cover, of such tanker, and conveniently located particularly in the annular margin between the radial. flange and a centrally located hingible disc closure of the manhole cover. Specifically, thevalve mechanism comprises a valve body carrying a valve controller;
and defining a first larger orifice; a gate, mounted for movement relative to the valve body and positioned to sealingly close and to open the forst larger orifice; and, means urging the gate into sealing, closing relation With the larger orifice, but responsive to the valve controller for positioning the gate open.
Description
The invention relates to a fluid valve for emergency unloading liquid conter-ts of an cverturned tank.
This novel valve also ~inds app1ica-tion in o~her environments where a controlled f:Low discharye or acces~, o~
the liquid is c3esired and t:~e nortnal oriice o~ fLuid discharge or access is either frozen close(3, o~ for sal~ety reasons, it i5 too risky to use jt.
In North ~nerica caustic, inLam[tlclble, and ol:hex materials and liquicds are constantly conveyed, -to a great extent by lorry or truck tank carriers which comprise either a tractor, as the prime rnoverr which pu115 a detachable passive trailer carrying thereon a liqui~3 containing tank, or a t:ank with a plurality of cham~ers each eontaining various or similar liquids; or, a single chassis with or without a prime mover and carrying on the chassis, a liqui~l containing t:ank with a single or a plurality of ~iquid containing compartments or chambers. In one environmental application, the tank may be a railway tank car.
These tank trailers, or "tankers" as they are ~nore colloquially called, generally are inter-partitioned into chambers and at the top of each chamb~r there is an access hole to the outside by which the respec-tive chamber is filled or possibly unloaded of its contents, but in which this upper access hole is large enough to accommodate the body oE a person so that inside inspeetion of the tank chambers may be facilitated.
The access or fill hole is of various sizes oten designated by regional law prov ding for minimum dimensions and usually embodies a man-acees, for repairing and cleaning and a fill section which may or may not be vented. The access hole is elosed by a a manhole cover that is, itself, a capt:ive eover plate with a circumscribing retaining ring l:hat mechanically secures the captive cover plate over the ac~ess hole This is the standard method of covering and of sealing the aceess hole. Generally, centred on the cover plate is a lateh operated, disc closure, with or Wit]lOUt vent melns, which when the latch is manually releasec3, swings away ~rom :.....
.
the cover plate and moves with it, lhe disc c:losure so that access into the charnber is o)tained throuyh an apert~re defined by the marginal arlnulus of the cclptive co~e~ pLate.
In some configurations, the AC~ ess hole is oval, but Inoc;t generally is circular ancl the c~lptive cover plate correspollds to the dimensions of the access hole and may be attclched thereto by an outer rirlg, or inl:ernal tie-d~wn bo:Lts, or rnay be secured on or bolted flallge-ctyle as those ~;kil.led in the art will know.
If, perchance the tanker has overturned, as a resuli of a mishap on the highway, removal of the liqui.d in each cha!nber is presently achieved by a number of methods;
(1) upriyhting the tan~er so tha~ r.ormal rernoval practices can take place;
This novel valve also ~inds app1ica-tion in o~her environments where a controlled f:Low discharye or acces~, o~
the liquid is c3esired and t:~e nortnal oriice o~ fLuid discharge or access is either frozen close(3, o~ for sal~ety reasons, it i5 too risky to use jt.
In North ~nerica caustic, inLam[tlclble, and ol:hex materials and liquicds are constantly conveyed, -to a great extent by lorry or truck tank carriers which comprise either a tractor, as the prime rnoverr which pu115 a detachable passive trailer carrying thereon a liqui~3 containing tank, or a t:ank with a plurality of cham~ers each eontaining various or similar liquids; or, a single chassis with or without a prime mover and carrying on the chassis, a liqui~l containing t:ank with a single or a plurality of ~iquid containing compartments or chambers. In one environmental application, the tank may be a railway tank car.
These tank trailers, or "tankers" as they are ~nore colloquially called, generally are inter-partitioned into chambers and at the top of each chamb~r there is an access hole to the outside by which the respec-tive chamber is filled or possibly unloaded of its contents, but in which this upper access hole is large enough to accommodate the body oE a person so that inside inspeetion of the tank chambers may be facilitated.
The access or fill hole is of various sizes oten designated by regional law prov ding for minimum dimensions and usually embodies a man-acees, for repairing and cleaning and a fill section which may or may not be vented. The access hole is elosed by a a manhole cover that is, itself, a capt:ive eover plate with a circumscribing retaining ring l:hat mechanically secures the captive cover plate over the ac~ess hole This is the standard method of covering and of sealing the aceess hole. Generally, centred on the cover plate is a lateh operated, disc closure, with or Wit]lOUt vent melns, which when the latch is manually releasec3, swings away ~rom :.....
.
the cover plate and moves with it, lhe disc c:losure so that access into the charnber is o)tained throuyh an apert~re defined by the marginal arlnulus of the cclptive co~e~ pLate.
In some configurations, the AC~ ess hole is oval, but Inoc;t generally is circular ancl the c~lptive cover plate correspollds to the dimensions of the access hole and may be attclched thereto by an outer rirlg, or inl:ernal tie-d~wn bo:Lts, or rnay be secured on or bolted flallge-ctyle as those ~;kil.led in the art will know.
If, perchance the tanker has overturned, as a resuli of a mishap on the highway, removal of the liqui.d in each cha!nber is presently achieved by a number of methods;
(1) upriyhting the tan~er so tha~ r.ormal rernoval practices can take place;
(2) open the latch to swing open the disc closure and dump the contents into ~n interim basin posltioned adjacent to the access hole and then pump the li~uid from the interim basin to a new storage tank; and,
(3) drill a convenient:l.y located hole through the chamber wall, tap the same, and insert a new stop and cock or other valve, and drain the contents.
Those skilled in the art wil]. appreciate that each one of these alternatives is not ~lways available, because of either the physical location of the overt:urned tanker, the volatility, or the caustic nat~lre of the contents, or the nature of the surrounding neigh~ourhood where the mishap has taken place, or even because of the absence of suitable equipment to upright the tank.and to unload its contents.
The invention, thereEore, achieves a spring loadeci, manually operated, flow and relief valve to be associated ~ith each oE such chambers of a tarlker. Preferably, this ~low valve can be conviently and permanently mounted as an emergency discharge orifice in the capitive covert ~.~her conveniently located in the annular margin between the radial flange and the hin~ible disc cl~sure and s:ituated to un:Load the liqui.d to a level where saf~ open:ing of the access hole can be achieved to then enabl.e an unloadirlg hose to be s~
inserted into the cornpartment t.o allow the removal of the balance of ~he liquid cargo.
Where two such va:lves are used wi.th each ch.rllnbe~, orlt:
acts as the liquid drain route E(i:r the content.s, the othe~ J
a spring loaded air relief va]ve for di:,placeTIlellt oE the liquid contents relnoved frolrl th~ chartll:~er wlth air Er:om th(:!
environment, whi'Le not allowiny liqllid to 'I.eak. through the same. The dl~al valve use is neeclecl if the spring loadec'l relief valve normally located in the disc closure of the captive cover plate becomes inopel-ative.
The invention, therefore, contemplates:
A valve mechanism comprisinl;
(a) a valve body (i) carrying a valve controller; and, (ii) deining a first ).aryer orifice;
(b) a gate, mounted for movement relative to the va:Lve body and positioned to seal.ingly close and to open the firs-t larger oriEice; and, (c~ means urging the ~Jate into ,ealing, closi.ng relation with the laryer orifice, but responsive to the valve controller for positioning the gate open.
The invention further cont.emplates a valve mecharlism comprising;
(a) a valve body;
(i) defining a major and minor bore;
ii) carrying a valve controller that includes ashaft that extends and slidi.ngly travels in sealing engagement thr-:,ugh the minor bore;
(b) a valve gate with a depending stem, mounted or movement relative to the valve body, the gate positioned to sealingly close and to open the rnajor hore, the stem connected to the shaft and responsive to the relat:ive position of the shaft and the valve body; andl (c) means biasing the ga~e into sea:Ling and closing relationship relative to th~ larger orlfice~
The invention will now be described by way oE example with reference -to the figures.
~Z~L50 Figure 1 is a perspective of the pior art method of removing contents from an overturi~ed trailer usi~y a basin and pump.
Figure 2 i5 the same per~lpective, b~lt utili~ing the valve of this invention, ancl hellce elimi.nating the need and risk of a basin.
F`igure 3 is a perspective of a typicaL capti.ve cover plate, showing the preferred location oE the nvvel valve oE
this invention, anc1 in phantom, the preEerred location oE a second of such valves when two arc desired.
Figure 4 is a plan view of the valve of Eigure 3.
Figure 5 is a cross-sectional view alon~ lines V-V of figure 3.
Figure 6 is an assembly vi~w, partially in section, of the upper portions of the valve controller operating stem.
Figure 7 is a partial cross-sectional view of the position of the gate when the v~lve mechani.sm is used as a relief valve.
Referring to figure 1, an overturned tanker 10 is shown with a recovery tractor and tank 15 at the rnargins o a road.
The contents of one chamber of l:he overturned tanker 10 has been organized to flow into a t,asin 11, which, by gravity, flows down hose 12 to pump 13 for pumping conveyance into a corresponding chamber in the re~overy vehicle 15. In this figure the captive cover plate 14 (or manhole cover) of the recovery vehicle 15 is shown ly.ing on the highway so as to permit the loading of the liquid 3 from the overturned tanker 10, although in general, the caPtive cover plate 14 need not be removed when it is fitted wil:h a latchable operated disc closure 16 defined by the outer ~nnulus of the cover plate 14 and which is a conventional strucl:ure in this art.
:~ Figure 2 is a depiction of the similar incident or mishap, but using the valve of this invention. Hence, the need for an overflow basin 11 is ~lminated.
. The valve of this invention is generally indicated a-~: 20 in figures 3, 4 and 5 and compri~;es a body 21 that defines a major and a minor orifice 22 and 23~ The major orifice 22 i5 fitted with an upstanding should~r 24, having a hose coupling which in this embocliment i.s an e teriot stallcllrd type thread 25, while as those ski.Llecl in the art wi 11 app~eclate that the shoulder 24 could be proil~-ld E~r any othul- hose coup].ing, egO cam and groove. A clust cover or cap 26, in t:his embodiment, threadingly enga{3es the th~ea(1s ZS in orc3er to keep contaminants out of the maj(,~ ori:Eice 2~ ur~ti1 elneryerlcy need arises.
Extending out of the minor :~riEice ~3 i " as part oE the valve controller, a sliding operatirlg stem 31 which extends through an annular shoulder 26, t:he outside di.ameter of which is likewise threaded to a standal~d type thrc!ad 27 so thal- a protective con-troller cap 28 can be over threaded the operating stem 30 when not in use or possibly suitably protected with an O ring type dus~. cap.
The valve body 21 therefor is affixed by convenient means ! either as by welding or bolting or riveting or the like, to the annular perimeter of tlle manhole cover (or captive cover plate 14) to anotLIer conven.ient :Location t:hat allows communication with the int~rior of the tank chamber Inside the tank, the valve depends and has an end plate and operating guide 40 disposed and fixed at a predetermi.ned distance from the valve body 2]. This is achieved by the utilization of four bolts 41 and appropriate spacers 42 surrounding the bolts, each mounted symmetrically about the major orifice 22 as shown in the figures. A di.sc gate 43 is positioned at the underside of the orifice 22 and for sealing, an annulus of rubber, or elastomeric, or other appropriate material is used to ~orm an annulur seal 44. This seal 44 may be secured in a ring 43 by the mi].ling of an annular recess 45 into which the sealing ring 44 ma-~ be securedLy fixed.
The disc 43 has a centrally depending valve stem 47 whose distal end freely extends tilrough an aperture 46 def:i.ned by the end plate and operating ~rrn 40, and through anolher aperture 56 defined by the operat..ng arm 50. There the distal end of .the sha~t 47 is held in juxtapositioll with the obverse or exterior side of the operatin3 arm 50 by a stop meanC; in the form of a roll pin 48 thal extends through the shaft:;
hence, the roll pin 48 is posit.onecl on the e~terior sid( of the operating arm to act ther-~ as a ;lop m~ans Eor the operating arm. The purpose o4 operating arrtl .S0 wil] ~)e described more particularly llereina:fter, hut its ~lome position, and re~erring to Eiyure 5, .is the phc-lrltolTl positiotl, whi.le the operating position is -he bo].d position of the ,ame ~igure. In Eigure 7, the home position o~ the ope:rating arm 50 is shown bold.
A coil compression spring 49 is positi.oned between the underside of the disc ~3 and the end plate 40 and, therehy provides a continuous biasing fo~ce aga:inst the disc gate 43, urging the same to sealingly clo;e the major orifice 22.
In a very similar manner, I:he sliding operating stem 30 extends through the minor aperture 23 and a corresponding orifice in the end plate 40 and the operating arm 50. In a convenient manner, as by weldin~l joint 53 the distal en~ of the operating stem 30 i5 secured to the movable operating arm 50. The operating stem 30 is conveniently made of three coaxial alligned and fitting parts, an upper shaft 31 extending into a lower shoulder region 33 defining a lower central recess 32 into which fitt: an operating shaft 34. The upper shaft 31 profiles a hexag--,nal nut as an operating head 35. A second coaxial coiled spring 36 is positioned between the end plate 40 coaxial with tl.e operating shaft 33 ~o urge against the underside of the t~e shoulder 33 of the upper shaft 31. Conveniently, interspaced between the upper portion of the spring 49 is a rolL pi.n 60 extending through the operating sha:Et 33 that acts as the bearing sur:Eace for the upper shaft 31. In order to provide a sealing arrange~nent between the slidable upper sha~t 31 and the circumscrioing collar 26 thereof an O ring 29 i, mounted in a recess defined by the inner bore 23 to provide ;I sealiny interface~
As will be seen in figure 5, whnen the operating stem 30 is pushed downward as by fin~er (as shown) or by cther mechanism, from the home or pharltom position downward to the operating, or bold position, in accordance with the vertical -~4~S~
arrow 60, the operating arm 50 ~ecends to the bo:Ld posit:ion shown and pushes against the roll pin 48 puLlin(3 the disc ga~e 43 open. Liquid ~lows, as showr1 ~y t.he ~low ar~ws 70l oul: of the major orifice 22 into tl1e hose 12 of figure 2 Eo~
convenient conveyance as requirecl.
In order to avoid the need for holdil19 the s.Li~lin~3 operating stem 30 in the depcessec1 position, a part:ial circumferential interlock:iny yr~ove 7S is clisposed in the internal diameter of the stem ho..s:ing 26 and acts, as will. be noted hereafter, as a locking groove. This groove extends, at one end, upward into a vertica:Ll~ communicatiny slot 76. The sliding operating stem 30 is fit1:ed a pro-tuberance or pin 77, so that when it is depressed c1Ow!lward from the phantom to the bold position of igure 5, the protuberance slides down the vertical slot 76 and i then, the sliding operating stem 30 is rotated, as il1ustrated by arrow 80, the protuberance 77 enters the horizontally positiol1ed circumferel1tial internal locking groove 75 to constrain the operating stem 30 and h,-.:nce the disc gate 43 in the open an;l bold posit.ion of figure 5.
Hence, for this conv~nience, the upper head of the operal:ing stem 30 is fi~ted with the profile of a nut 35 so that i:his loc~ing action may be conveniently achieved with use cf a wrench.
Referring to figure 3 in phantom, is shown, the posi~:ion of a second such valve 20', al.though it might be located anywhere in communication with the chamber. In operation, one of the valves 20 has its major orifice communicated and threaded onto the end of the hose 12 for removal of the li~luid and the operating stem 30 is loc:ed into the open position by rotating the same so that the protuberance 77 enters the horizontal slot 75 to constrain it. The second or pharltom valve 20' is allowed to remain i~ the normal closed positi.on, but the caps 26 and 28 of the ma~or and minor ori~ices 22 and 23 thereof are removed. As the liquid flows out the major orifice 22, of the main valve 20, and referl-ing to figure 7, the phantom valve 20' will allo~ air to flow past the cli~c ~ate 43 since the "vacuum" created in the tar1k will overc:ome =~
:... ..
s~
~ 8 -the biasing and urging force of the coil spring 4g of l:hat valve. This act:ion is achieved because the valve stcm ~7 extends "freely" through -the apertures ~6 and 5~. Th~s any vacuum in the tank chamber, that provides a pres~.iure diEferential across the gate 43 that is greater than the biasing force provided by the coil spring 49, a:l.lows the ~ate 43 to decend tthe bold position of liyure 5), wh:i:Le l:he operating arm 50 remains i.n its home position so that a steady stream of 1uid will pass out l:he major orifice 22 of the valve 20. The flow of air passiIlg through the major orifice 22 of the phantom valve 20' into the chamber inhibits liquid escaping out o~ the phantom valve 20'~
Those skilled in the art ~ill now app:reciate that the valves ~.0 could be located, convenierItly~ not on the manhole cover or the captive cover plate, h~-t at any o~.her conveniently located position.
It will be apparent, there~ore, to those skilled in the art that various alterations and varia~ions to the preferred embodiment disclosed, may be made without d~!parting from the invention as claimed.
Those skilled in the art wil]. appreciate that each one of these alternatives is not ~lways available, because of either the physical location of the overt:urned tanker, the volatility, or the caustic nat~lre of the contents, or the nature of the surrounding neigh~ourhood where the mishap has taken place, or even because of the absence of suitable equipment to upright the tank.and to unload its contents.
The invention, thereEore, achieves a spring loadeci, manually operated, flow and relief valve to be associated ~ith each oE such chambers of a tarlker. Preferably, this ~low valve can be conviently and permanently mounted as an emergency discharge orifice in the capitive covert ~.~her conveniently located in the annular margin between the radial flange and the hin~ible disc cl~sure and s:ituated to un:Load the liqui.d to a level where saf~ open:ing of the access hole can be achieved to then enabl.e an unloadirlg hose to be s~
inserted into the cornpartment t.o allow the removal of the balance of ~he liquid cargo.
Where two such va:lves are used wi.th each ch.rllnbe~, orlt:
acts as the liquid drain route E(i:r the content.s, the othe~ J
a spring loaded air relief va]ve for di:,placeTIlellt oE the liquid contents relnoved frolrl th~ chartll:~er wlth air Er:om th(:!
environment, whi'Le not allowiny liqllid to 'I.eak. through the same. The dl~al valve use is neeclecl if the spring loadec'l relief valve normally located in the disc closure of the captive cover plate becomes inopel-ative.
The invention, therefore, contemplates:
A valve mechanism comprisinl;
(a) a valve body (i) carrying a valve controller; and, (ii) deining a first ).aryer orifice;
(b) a gate, mounted for movement relative to the va:Lve body and positioned to seal.ingly close and to open the firs-t larger oriEice; and, (c~ means urging the ~Jate into ,ealing, closi.ng relation with the laryer orifice, but responsive to the valve controller for positioning the gate open.
The invention further cont.emplates a valve mecharlism comprising;
(a) a valve body;
(i) defining a major and minor bore;
ii) carrying a valve controller that includes ashaft that extends and slidi.ngly travels in sealing engagement thr-:,ugh the minor bore;
(b) a valve gate with a depending stem, mounted or movement relative to the valve body, the gate positioned to sealingly close and to open the rnajor hore, the stem connected to the shaft and responsive to the relat:ive position of the shaft and the valve body; andl (c) means biasing the ga~e into sea:Ling and closing relationship relative to th~ larger orlfice~
The invention will now be described by way oE example with reference -to the figures.
~Z~L50 Figure 1 is a perspective of the pior art method of removing contents from an overturi~ed trailer usi~y a basin and pump.
Figure 2 i5 the same per~lpective, b~lt utili~ing the valve of this invention, ancl hellce elimi.nating the need and risk of a basin.
F`igure 3 is a perspective of a typicaL capti.ve cover plate, showing the preferred location oE the nvvel valve oE
this invention, anc1 in phantom, the preEerred location oE a second of such valves when two arc desired.
Figure 4 is a plan view of the valve of Eigure 3.
Figure 5 is a cross-sectional view alon~ lines V-V of figure 3.
Figure 6 is an assembly vi~w, partially in section, of the upper portions of the valve controller operating stem.
Figure 7 is a partial cross-sectional view of the position of the gate when the v~lve mechani.sm is used as a relief valve.
Referring to figure 1, an overturned tanker 10 is shown with a recovery tractor and tank 15 at the rnargins o a road.
The contents of one chamber of l:he overturned tanker 10 has been organized to flow into a t,asin 11, which, by gravity, flows down hose 12 to pump 13 for pumping conveyance into a corresponding chamber in the re~overy vehicle 15. In this figure the captive cover plate 14 (or manhole cover) of the recovery vehicle 15 is shown ly.ing on the highway so as to permit the loading of the liquid 3 from the overturned tanker 10, although in general, the caPtive cover plate 14 need not be removed when it is fitted wil:h a latchable operated disc closure 16 defined by the outer ~nnulus of the cover plate 14 and which is a conventional strucl:ure in this art.
:~ Figure 2 is a depiction of the similar incident or mishap, but using the valve of this invention. Hence, the need for an overflow basin 11 is ~lminated.
. The valve of this invention is generally indicated a-~: 20 in figures 3, 4 and 5 and compri~;es a body 21 that defines a major and a minor orifice 22 and 23~ The major orifice 22 i5 fitted with an upstanding should~r 24, having a hose coupling which in this embocliment i.s an e teriot stallcllrd type thread 25, while as those ski.Llecl in the art wi 11 app~eclate that the shoulder 24 could be proil~-ld E~r any othul- hose coup].ing, egO cam and groove. A clust cover or cap 26, in t:his embodiment, threadingly enga{3es the th~ea(1s ZS in orc3er to keep contaminants out of the maj(,~ ori:Eice 2~ ur~ti1 elneryerlcy need arises.
Extending out of the minor :~riEice ~3 i " as part oE the valve controller, a sliding operatirlg stem 31 which extends through an annular shoulder 26, t:he outside di.ameter of which is likewise threaded to a standal~d type thrc!ad 27 so thal- a protective con-troller cap 28 can be over threaded the operating stem 30 when not in use or possibly suitably protected with an O ring type dus~. cap.
The valve body 21 therefor is affixed by convenient means ! either as by welding or bolting or riveting or the like, to the annular perimeter of tlle manhole cover (or captive cover plate 14) to anotLIer conven.ient :Location t:hat allows communication with the int~rior of the tank chamber Inside the tank, the valve depends and has an end plate and operating guide 40 disposed and fixed at a predetermi.ned distance from the valve body 2]. This is achieved by the utilization of four bolts 41 and appropriate spacers 42 surrounding the bolts, each mounted symmetrically about the major orifice 22 as shown in the figures. A di.sc gate 43 is positioned at the underside of the orifice 22 and for sealing, an annulus of rubber, or elastomeric, or other appropriate material is used to ~orm an annulur seal 44. This seal 44 may be secured in a ring 43 by the mi].ling of an annular recess 45 into which the sealing ring 44 ma-~ be securedLy fixed.
The disc 43 has a centrally depending valve stem 47 whose distal end freely extends tilrough an aperture 46 def:i.ned by the end plate and operating ~rrn 40, and through anolher aperture 56 defined by the operat..ng arm 50. There the distal end of .the sha~t 47 is held in juxtapositioll with the obverse or exterior side of the operatin3 arm 50 by a stop meanC; in the form of a roll pin 48 thal extends through the shaft:;
hence, the roll pin 48 is posit.onecl on the e~terior sid( of the operating arm to act ther-~ as a ;lop m~ans Eor the operating arm. The purpose o4 operating arrtl .S0 wil] ~)e described more particularly llereina:fter, hut its ~lome position, and re~erring to Eiyure 5, .is the phc-lrltolTl positiotl, whi.le the operating position is -he bo].d position of the ,ame ~igure. In Eigure 7, the home position o~ the ope:rating arm 50 is shown bold.
A coil compression spring 49 is positi.oned between the underside of the disc ~3 and the end plate 40 and, therehy provides a continuous biasing fo~ce aga:inst the disc gate 43, urging the same to sealingly clo;e the major orifice 22.
In a very similar manner, I:he sliding operating stem 30 extends through the minor aperture 23 and a corresponding orifice in the end plate 40 and the operating arm 50. In a convenient manner, as by weldin~l joint 53 the distal en~ of the operating stem 30 i5 secured to the movable operating arm 50. The operating stem 30 is conveniently made of three coaxial alligned and fitting parts, an upper shaft 31 extending into a lower shoulder region 33 defining a lower central recess 32 into which fitt: an operating shaft 34. The upper shaft 31 profiles a hexag--,nal nut as an operating head 35. A second coaxial coiled spring 36 is positioned between the end plate 40 coaxial with tl.e operating shaft 33 ~o urge against the underside of the t~e shoulder 33 of the upper shaft 31. Conveniently, interspaced between the upper portion of the spring 49 is a rolL pi.n 60 extending through the operating sha:Et 33 that acts as the bearing sur:Eace for the upper shaft 31. In order to provide a sealing arrange~nent between the slidable upper sha~t 31 and the circumscrioing collar 26 thereof an O ring 29 i, mounted in a recess defined by the inner bore 23 to provide ;I sealiny interface~
As will be seen in figure 5, whnen the operating stem 30 is pushed downward as by fin~er (as shown) or by cther mechanism, from the home or pharltom position downward to the operating, or bold position, in accordance with the vertical -~4~S~
arrow 60, the operating arm 50 ~ecends to the bo:Ld posit:ion shown and pushes against the roll pin 48 puLlin(3 the disc ga~e 43 open. Liquid ~lows, as showr1 ~y t.he ~low ar~ws 70l oul: of the major orifice 22 into tl1e hose 12 of figure 2 Eo~
convenient conveyance as requirecl.
In order to avoid the need for holdil19 the s.Li~lin~3 operating stem 30 in the depcessec1 position, a part:ial circumferential interlock:iny yr~ove 7S is clisposed in the internal diameter of the stem ho..s:ing 26 and acts, as will. be noted hereafter, as a locking groove. This groove extends, at one end, upward into a vertica:Ll~ communicatiny slot 76. The sliding operating stem 30 is fit1:ed a pro-tuberance or pin 77, so that when it is depressed c1Ow!lward from the phantom to the bold position of igure 5, the protuberance slides down the vertical slot 76 and i then, the sliding operating stem 30 is rotated, as il1ustrated by arrow 80, the protuberance 77 enters the horizontally positiol1ed circumferel1tial internal locking groove 75 to constrain the operating stem 30 and h,-.:nce the disc gate 43 in the open an;l bold posit.ion of figure 5.
Hence, for this conv~nience, the upper head of the operal:ing stem 30 is fi~ted with the profile of a nut 35 so that i:his loc~ing action may be conveniently achieved with use cf a wrench.
Referring to figure 3 in phantom, is shown, the posi~:ion of a second such valve 20', al.though it might be located anywhere in communication with the chamber. In operation, one of the valves 20 has its major orifice communicated and threaded onto the end of the hose 12 for removal of the li~luid and the operating stem 30 is loc:ed into the open position by rotating the same so that the protuberance 77 enters the horizontal slot 75 to constrain it. The second or pharltom valve 20' is allowed to remain i~ the normal closed positi.on, but the caps 26 and 28 of the ma~or and minor ori~ices 22 and 23 thereof are removed. As the liquid flows out the major orifice 22, of the main valve 20, and referl-ing to figure 7, the phantom valve 20' will allo~ air to flow past the cli~c ~ate 43 since the "vacuum" created in the tar1k will overc:ome =~
:... ..
s~
~ 8 -the biasing and urging force of the coil spring 4g of l:hat valve. This act:ion is achieved because the valve stcm ~7 extends "freely" through -the apertures ~6 and 5~. Th~s any vacuum in the tank chamber, that provides a pres~.iure diEferential across the gate 43 that is greater than the biasing force provided by the coil spring 49, a:l.lows the ~ate 43 to decend tthe bold position of liyure 5), wh:i:Le l:he operating arm 50 remains i.n its home position so that a steady stream of 1uid will pass out l:he major orifice 22 of the valve 20. The flow of air passiIlg through the major orifice 22 of the phantom valve 20' into the chamber inhibits liquid escaping out o~ the phantom valve 20'~
Those skilled in the art ~ill now app:reciate that the valves ~.0 could be located, convenierItly~ not on the manhole cover or the captive cover plate, h~-t at any o~.her conveniently located position.
It will be apparent, there~ore, to those skilled in the art that various alterations and varia~ions to the preferred embodiment disclosed, may be made without d~!parting from the invention as claimed.
Claims (15)
1. A valve mechanism comprising;
(a) a valve body;
(i) defining a major and minor bore;
(ii) carrying a valve controller including a plate and a shaft that extends through and slidingly travels in sealing engagement with the minor bore;
(b) a valve gate mounted for movement relative to the valve body, the gate positioned to sealingly close and to open the major bore, the valve gate carrying a stem;
(c) a first biasing means mounted for urging the gate into a sealing and closed relation with the major bore;
(d) means on the plate for allowing relative movement of the stem, and hence the valve gate, relative to the plate; and, (e) a second biasing means mounted for urging the stem plate and hence valve into sealing and closed relation with the major bore.
(a) a valve body;
(i) defining a major and minor bore;
(ii) carrying a valve controller including a plate and a shaft that extends through and slidingly travels in sealing engagement with the minor bore;
(b) a valve gate mounted for movement relative to the valve body, the gate positioned to sealingly close and to open the major bore, the valve gate carrying a stem;
(c) a first biasing means mounted for urging the gate into a sealing and closed relation with the major bore;
(d) means on the plate for allowing relative movement of the stem, and hence the valve gate, relative to the plate; and, (e) a second biasing means mounted for urging the stem plate and hence valve into sealing and closed relation with the major bore.
2. A valve mechanism comprising;
(a) a valve body;
(i) defining a major and a minor bore;
(ii) carrying a valve controller including a plate and a shaft that extend through and slidingly travels in sealing engagement with the minor bore;
(b) a valve gate mounted for movement relative to the valve body, the gate positioned to sealingly close and to open the major bore, the valve gate carrying a stem;
(c) a coil spring mounted between the gate and the plate, urging the gate into a sealing and closed relation with the major bore;
(d) means on the plate for allowing relative movement of the stem, and hence the valve gate, relative to the plate; and, (e) a second coil spring mounted between plate and valve body for urging the stem, plate and hence valve into sealing and closed relation with the major bore.
(a) a valve body;
(i) defining a major and a minor bore;
(ii) carrying a valve controller including a plate and a shaft that extend through and slidingly travels in sealing engagement with the minor bore;
(b) a valve gate mounted for movement relative to the valve body, the gate positioned to sealingly close and to open the major bore, the valve gate carrying a stem;
(c) a coil spring mounted between the gate and the plate, urging the gate into a sealing and closed relation with the major bore;
(d) means on the plate for allowing relative movement of the stem, and hence the valve gate, relative to the plate; and, (e) a second coil spring mounted between plate and valve body for urging the stem, plate and hence valve into sealing and closed relation with the major bore.
3. The valve mechanism as claimed in claim 1 or 2, wherein the plate defines an aperture through which the stem extends, and there is stop means on the stem, adjacent to the side of the plate obverse to the valve gate whereby when the controller and plate are moved, the plate urges against the stop means to move the gate valve into an open position.
4. The valve mechanism as claimed in claim 2, wherein the first coil spring circumscribes the shaft,
5. The valve mechanism as claimed in claim 2, wherein the second coil spring circumscribes the stem.
6. The valve mechanism as claimed in claim 1 or 2, wherein the plate defines an aperture through which the stem extends, and there is stop means on the stem, adjacent to the side of the plate obverse to the valve gate whereby when the controller and plate are moved, the plate urges against the stop means to move the gate valve into an open position and the first coil spring circumscribes the shaft.
7. The valve mechanism as claimed in claim 1 or 2, wherein the plate defines an aperture through which the stem extends, and there is stop means on the stem, adjacent to the side of the plate obverse to the valve gate whereby when the controller and plate are moved, the plate urges against the stop means to move the gate valve into an open position and the second coil spring circumscribes the stem.
8. The valve mechanism as claimed in claim 1, 2 or 4, wherein the major bore defines a hose coupling means thereabout for mating the same to a hose or the like.
9. A closed liquid containing chamber having walls, the walls defining at least one of the valve means as claimed in claim 1, 2 or 4.
10. A closed liquid containing chamber having walls, the walls defining at least one of the valve means as claimed in claim 5, 6 or 7.
11. A closed liquid containing chamber having walls defining at least two valve mechanisms as claimed in claim 1, 2 or 4.
12. A closed liquid containing chamber having walls defining at least two valve mechanisms as claimed in claim 5, 6 or 7.
13. A closed liquid containing chamber having walls defining at least two valve mechanisms as claimed in claim 1 or 2, wherein each plate defines an aperture through which the stem extends, and there is stop means on the stem, adjacent to the side of the plate obverse to the valve gate whereby when the controller and plate are moved, the plate urges against the stop means to move the gate valve into an open position.
14. A closed liquid containing chamber having walls defining at least two valve mechanisms as claimed in claim 1 or 2, wherein each plate defines an aperture through which the stem extends, and there is stop means on the stem, adjacent to the side of the plate obverse to the valve gate whereby when the controller and plate are moved, the plate urges against the stop means to move the gate valve into an open position and the first coil spring circumscribes the shaft.
15. A closed liquid containing chamber having walls defining at least two valve mechanisms as claimed in claim 1 or 2, wherein the plate of each defines an aperture through which the stem extends, and there is stop means on the stem, adjacent to the side of the plate obverse to the valve gate whereby when the controller and plate are moved, the plate urges against the stop means to move the gate valve into an open position and the second coil spring circumscribes the stem.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000419953A CA1214150A (en) | 1983-01-21 | 1983-01-21 | Unloading valve for over-turned tank |
| GB08328810A GB2133859B (en) | 1983-01-21 | 1983-10-28 | Flow control valve |
| DE19833343659 DE3343659A1 (en) | 1983-01-21 | 1983-12-02 | DELETE OR DISCHARGE VALVE FOR TIPPED TANK VEHICLES OR THE LIKE. |
| DE19838334655 DE8334655U1 (en) | 1983-01-21 | 1983-12-02 | Extinguishing or unloading valve for overturned tank vehicles or the like. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000419953A CA1214150A (en) | 1983-01-21 | 1983-01-21 | Unloading valve for over-turned tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1214150A true CA1214150A (en) | 1986-11-18 |
Family
ID=4124396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000419953A Expired CA1214150A (en) | 1983-01-21 | 1983-01-21 | Unloading valve for over-turned tank |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1214150A (en) |
| DE (2) | DE8334655U1 (en) |
| GB (1) | GB2133859B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9102510B1 (en) | 2014-09-05 | 2015-08-11 | Randy Cortner | Overturned tanker fuel recovery system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8715864U1 (en) * | 1987-12-01 | 1988-02-18 | Thümmler, Siegfried, 32657 Lemgo | Safety emptying device on tank vehicles |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191086A (en) * | 1921-06-28 | 1922-12-28 | Harry Clayton | Improvements in controlling valves for liquids and gases |
| GB207718A (en) * | 1923-01-01 | 1923-12-06 | Fred Barnett Hayes | Improvements in valves |
| DE1849535U (en) * | 1962-01-20 | 1962-04-05 | F W Oventrop Arn Sohn K G | OUTLET BARRIER. |
| US3240467A (en) * | 1963-07-02 | 1966-03-15 | Ranco Inc | Self-aligning pivoted valve |
| DE1930058U (en) * | 1965-07-01 | 1965-12-30 | Gerdts Gustav F Kg | BOILER WAGON WITH TWO VALVES CONNECTED IN A SERIES. |
| DE7039414U (en) * | 1970-10-24 | 1971-02-25 | Ahrens & Bode Maschinen- U Apparatebau | BOTTOM DRAIN VALVE FOR CONTAINER |
| GB1473319A (en) * | 1974-05-31 | 1977-05-11 | Harrison P | Fluid-flow control valves |
-
1983
- 1983-01-21 CA CA000419953A patent/CA1214150A/en not_active Expired
- 1983-10-28 GB GB08328810A patent/GB2133859B/en not_active Expired
- 1983-12-02 DE DE19838334655 patent/DE8334655U1/en not_active Expired
- 1983-12-02 DE DE19833343659 patent/DE3343659A1/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9102510B1 (en) | 2014-09-05 | 2015-08-11 | Randy Cortner | Overturned tanker fuel recovery system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE8334655U1 (en) | 1984-07-05 |
| GB8328810D0 (en) | 1983-11-30 |
| GB2133859B (en) | 1986-05-08 |
| DE3343659A1 (en) | 1984-07-26 |
| GB2133859A (en) | 1984-08-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |