CA1115557A - Variable area meter insert unit - Google Patents
Variable area meter insert unitInfo
- Publication number
- CA1115557A CA1115557A CA313,159A CA313159A CA1115557A CA 1115557 A CA1115557 A CA 1115557A CA 313159 A CA313159 A CA 313159A CA 1115557 A CA1115557 A CA 1115557A
- Authority
- CA
- Canada
- Prior art keywords
- insert unit
- tube
- flow meter
- variable area
- panel
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
- G01F1/22—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow by variable-area meters, e.g. rotameters
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Abstract
VARIABLE AREA METER INSERT UNIT
Abstract of the Disclosure A variable area meter unit is described which is self-contained to provide a meter tube in an enclosure and facilitate insertion and location Or the tube in a standard support frame. The enclosure can be manufactured with a viewing face consisting of a lens to improve prove read-ability through single axis magnification. Additionally, a high pressure release panel can form another side of the enclosure to direct any blow-outs in a preferred direction.
Abstract of the Disclosure A variable area meter unit is described which is self-contained to provide a meter tube in an enclosure and facilitate insertion and location Or the tube in a standard support frame. The enclosure can be manufactured with a viewing face consisting of a lens to improve prove read-ability through single axis magnification. Additionally, a high pressure release panel can form another side of the enclosure to direct any blow-outs in a preferred direction.
Description
~.5S57 The invention is concerned generally with vari~ble area meters userul in the measurement Or fluid flow. ~ore particularly~ it is concerned with a variable area meter unit comprising an enclosure and a meter tube which can be inserted into a support frame.
Conventional variable area meters typically consist Or a rectangular, metal framework having top and bottom housings to receive inlet and outlet rlttings rrom the fluid flow line. The housing also contains the sealing neans to incorporate the meter tube into the flow system. Generally, the sealing ~eans consists of a Ea~ket enco~passing the tube near each end and a seal spindle in the top ho~sing which rotates to compress the gasket about the ~eter tube. The top and bottom housing generally are connected by t~o metal panels on opposed .. : ;. . :,.. .
sides. A front, clear cover and a back, opaque cover a~e provided between the sides.
Eecau~se Or space require~,ents in ~ost proces~ operations wherein variable area meters are utilized, the sides of the ~ramework often are close to the meter tube. Th~s, it ls difficult to insert and remove the tube from the frameworkO A co~ ~n method is to place a sm~ll seg~ent Or paper about the tube, grasp the two free ends of the ~ -paper so that the tube will be held by the paper, insert the tube and ~k . '' S~5~ -pclper into the framework, cen~er the tube, r~tate ~he sec~ing spln~l~
to seat the seals ~Ihile supporting the tube in a centered, upright configuration, removing the pa~er and M nally attaching> the front cover to the rra~ework.
Several serious problems are apparent from that procedure.
Firstly, it ls very difficult to insert the meter tube within the narrow ~ramework using the fingers alone and the use of the paper greatly increases the chances Or tube slippage and breakage. Secondly, it is difficult to center the tube and retaln it in an upright position while the sealing spindle is being tightened. Furthermore, conventional sealing spindles cause the tube itself to rotate~ r~hat rotatlon usually is not constant between different tubes and ~ameworks, and estimates of an initial tube rotational position are necessary to end with the indicia cn the tube facing in the forward direction where it can be read by an operator. Failure to center the tube can result in chipping Or the tube i~ metal to gLass contact is made.
Other disadvantages are present in conventional units. rfhe flat surface efrect of the clear, front panel generally distorts the float image as seen throu~h the front cover, and accurate reading of the indicated flow rate is difficult. A particular fault o~ conventional units is their inability to contnol glc~ss fragments from the tube if t.he tube explode~ Fragments are ~ust as likely to exit from the front of the rotameter as from the back, thus ~ncreasing the chances of injury to an operator. Flowmeter tubes are rated at 25Q pounds per square lnch generally and current standards require them to withstand 1-1/2 times rated pressure. i~o economical method has heretofor been developed for controll~ng explosions at or higher than the standard pressures in rotameters which are to have general applicatlons in the process industries.
S~'7 The invention as claimed herein is a variable area meter insert unit for insertion into a variable area flow meter frame having a pair of opposed side walls and a top and bottom housing with means for en~aging a flow meter tube, the inner sur-faces of the side walls and the top and hottom housin~s defining a partially enclosea first volume therebetween, the insert unit comprising a pair of side panels and a pair of end panels ~oined to the side panels to provide a unitary structure, each of the end panels having an opening therethrough for receiving a flow meter tube, the outer surfaces of the side panels and the end panels defining a partially enclosed second volume which is co-extensive with the first volume whereby the insert unit is flush with the meter frame when the insert unit is inserted into the flow meter frame, the openings in the end panels being positioned to axially ali~n the flow meter tube with the means in the top and bottom housing for engaging the 10w meter tube when the insert unit is flush with the flow meter frame.
The invention as claimed herein is also a variable :.
area meter insert unit for insertion into a variable area flow meter frame having a pair of opposed side walls and a top and bottom housing with means for en~aging and establishing fluid communication with a flow meter tuhe, the inner surfaces of the side walls and the top and bottom housings defining a par-tiallv enclosed first volume therebetween, the insert unit comprising side panel support means~ tube support means attached at the ends of each of the side panel support means for receiving a flow meter tube, the outer surfaces of the sidepanel support means and the tube support means defining a partially enclosed second volume which is coextensive with the first volume whereby the insert unit is flush with the meter frame when the insert unit is inserted into the flow meter frame, means on the tube support means for positioning a flow meter tube in fluid com--2a-S~'7 munication with the top and bottom housing, pressure relief means associated with the support means for releasin~ pressure in a predetermined direction, and viewing means between the side panel support means.
- 2b -iS'7 m e difficiencies present in current variable area meters are corrected by the compact, self-contained insert unit of the present invention, which is illustrated by the following drawings in which:
Figure 1 is an overall view of the insert unit located within the 5v support framew~rk, Figure 2 is a cross-sectional view of the insert unit and framework, ;
Figure 3 is a cross-sectional view along line 3-3 of Figure 2, -Figure 4 is a partial front view of the unit illustrating the magnification created by the lens portion of the insert unit;
Figures 5 and 6 illustrate valves which can be combin d with the meter unit; and Figure 7 illustrates a closure plug which is used on the meter unit when no valve is used.
lS m e insert unit 10 of this invention is adapted to fit with a generally conventional, variable area meter framework 30. Framework 30 is fabricated with conventional side members 31 and 32 connecting top housing 33 and ~ottom housing 34. Bottom housing 34 threadably receives fluid inlet fitting 36, which is sealed to the housing by seal 48.
Likewise tcp housing 33 threadably receives fluid outlet fitting 35, which is sealed to the housing by seal 47. Typically, seals 47 and 48 ;;
are 0-ring seals. Bottom housing 34 preferably is formed with a second threaded openin~ 49, which is adapted to receive valves 51 and 52 or closure plug 53. Inlet fitting 36 is in fluid communication with bores 54 and 56 in bottom housing 34. Bore 56 extends vertically fxom horizontal ~ore 54 to provide communication with the bore of rotameter flow tube 20 at its bottom end.
Top housin~ 33 is formed with a bore 57 for receiving sealing spindle 59. Spindle 59 is threaded at the upper portion 40 of bore 60, which extends through spindle 59. Upper portion 40 threadably engages screw member 37. Member 37 is aclapted to be rotated bv external means and preferably has hexa~onal driving means 38. Retaining washer 43 supports screw member 37~ Se~ling means 61, preferably an O-rin~, is retained between housin~
33 and member 37 to prevent any leakin~ of the flowin~
fluid.
Seal spindle 59 is provided with a flat portion 41 extendin~ alonq a substantial portion of its length.
Flat 41 is contacted by the end of fluid outlet fitting 35.
The imprin~ement of fitting 35 on flat 41 prevents spindle 59 from rotating when screw member 37 is rotated. The rotational motion of screw mem~er 37 is translated into the axial movement of spindle 59. ~ealin~ means 42 establishes a seal hetween the lower portion of spindle 59 and housin~
33.
- Insert unit ln is adaptecl to be inserted in frame-work 30 within the space clefined hv end housings 33 and 34 and side members 31 and 32. Insert unit 10 is comprised of side support panels 12 and 13 and end panels 14 and 15.
End panels 14 and 15 are joined to panels 12 and 13 at ~ .
-` the ends thereof and support meter tube 20 at a central location hy means of a hole 21 which receives tube 20 recessed portion 22 is formed in each encl panel 14 and 15 to receive sealing washers 45 and 46 respectively.
Recesses portion 22 also creates a resilient lip surrounclin~
hole 21 in each of the en~ panels 14 and 15 for facile insertion of tube 20 into end panel 14, Hols 21 is fixed to provicle a friction fit with tuhe 20, The resilient lip functions to ~rip tube 20 at a fixed position so that tube 20 will not slip from hole 21 and also to centrally locate tube 20 within in~ert unit 10~ ~ide panels 12 and 13 are formed with ~rooves 63 at the forward edges thereof :
; .
to facilitate removal of insert unit 10 from framework 30.
A clear, front-viewing panel is interposed between side panels 12 and 13. Slots 18 are found in sides 12 and 13 to receive panel 16. In a preferred e~bodiment panel 16 is convex lens to provide a magnifying effect to assist in reading of the indicia on tube 20.
Back panel 17 is interposed between side panels 12 and 13 and is retained within slots 19. Back panel 17 is formed from material substantially thinner than side panels 12 and 13, front panel 16 and end panels 14 and 15, and is adapted to release from slots 19 under a differential pressure which is on the order of several inches of water.
Consequently, if pressure in the fluid system causes tube 20 to explode, the excess pressure in unit 10 will cause panel 17 to move outwardly and release the then present forces and glass from the back of the rotameter. The explosion created by any tuke failure thus is controlled in a particular direction which can be chosen to minimize the danger of injury. The particular described ~mbodiment is advantageous in the process industries where rotameters are conventionally panel mounted. In those installations, it is apparent that the full force of the explosion will be directed in back of the panel, thus minimizing the chance of injury to cperators and other personnel who may be observing in front of the mounting panel.
When insert unit 10 is located within framework 30, tube 20 automatically is centered over bore 56 in housing 34 and under sealing spindle 59 and bore 60. Sealing washers 45 and 46 provide a seal between tube 20 and framework 30. In a preferred emkodiment sealing washers 45 and 46 are formed with an L,shaped transverse cross section so that they ;
function both to seal the tube and hold it in insert 10.
It is preferable to dimension insert 10 so that it fits flush within Eramework 30. Tube 20 then is centered appropriately in fr~mework 30 in a si~le operation. Then sealing spindle 50 is moved downwardly by rotating screw member 37 to force sealing washers 45 and 46 against s~7 the top and bottom of tube 20, respectively. As stated hereinbefore, flat 41 prevents spindle 59 from rotating and tube 20 renains in its insertion position. Accordln~ly~ it is no longer necessary to estimate an initial insertion position for the tube 20 wnich hopefully ~ould end with front-facing indicia when the seal was completed.
It is apparent that one insert unit can be used with a multitude of tubes with different inside diameters. Also, different shapes for the insert unit could be provided depending on the shape of the frame;wor~c into which it is to be inse~ed.
In another embodi~ent of the invention, insert 10 can be adapted to form a sealed structure about tube 20. Insert 10 can be filled with dry nitrogen or other inert gas to prevent condensation and/or frost from forming on the surface of tube 20, which might impair or even prevent accurate flow readin~s. Also, it is desired to form bottom panel 15 with a small groove in front of the front panel. That grcove facilltates rem~val of insert 10 when operations have been concluded either by means of a finger or thumb nail or an-appropriately shaped instrument, which can be inserted into the groove and pulled outwardly.
The invention has been illustrated with reference to the drawings but it will be-apparent to those skilled in the art that modifications can be made without departing from the splrit or scope of this lnventlon.
~.
Conventional variable area meters typically consist Or a rectangular, metal framework having top and bottom housings to receive inlet and outlet rlttings rrom the fluid flow line. The housing also contains the sealing neans to incorporate the meter tube into the flow system. Generally, the sealing ~eans consists of a Ea~ket enco~passing the tube near each end and a seal spindle in the top ho~sing which rotates to compress the gasket about the ~eter tube. The top and bottom housing generally are connected by t~o metal panels on opposed .. : ;. . :,.. .
sides. A front, clear cover and a back, opaque cover a~e provided between the sides.
Eecau~se Or space require~,ents in ~ost proces~ operations wherein variable area meters are utilized, the sides of the ~ramework often are close to the meter tube. Th~s, it ls difficult to insert and remove the tube from the frameworkO A co~ ~n method is to place a sm~ll seg~ent Or paper about the tube, grasp the two free ends of the ~ -paper so that the tube will be held by the paper, insert the tube and ~k . '' S~5~ -pclper into the framework, cen~er the tube, r~tate ~he sec~ing spln~l~
to seat the seals ~Ihile supporting the tube in a centered, upright configuration, removing the pa~er and M nally attaching> the front cover to the rra~ework.
Several serious problems are apparent from that procedure.
Firstly, it ls very difficult to insert the meter tube within the narrow ~ramework using the fingers alone and the use of the paper greatly increases the chances Or tube slippage and breakage. Secondly, it is difficult to center the tube and retaln it in an upright position while the sealing spindle is being tightened. Furthermore, conventional sealing spindles cause the tube itself to rotate~ r~hat rotatlon usually is not constant between different tubes and ~ameworks, and estimates of an initial tube rotational position are necessary to end with the indicia cn the tube facing in the forward direction where it can be read by an operator. Failure to center the tube can result in chipping Or the tube i~ metal to gLass contact is made.
Other disadvantages are present in conventional units. rfhe flat surface efrect of the clear, front panel generally distorts the float image as seen throu~h the front cover, and accurate reading of the indicated flow rate is difficult. A particular fault o~ conventional units is their inability to contnol glc~ss fragments from the tube if t.he tube explode~ Fragments are ~ust as likely to exit from the front of the rotameter as from the back, thus ~ncreasing the chances of injury to an operator. Flowmeter tubes are rated at 25Q pounds per square lnch generally and current standards require them to withstand 1-1/2 times rated pressure. i~o economical method has heretofor been developed for controll~ng explosions at or higher than the standard pressures in rotameters which are to have general applicatlons in the process industries.
S~'7 The invention as claimed herein is a variable area meter insert unit for insertion into a variable area flow meter frame having a pair of opposed side walls and a top and bottom housing with means for en~aging a flow meter tube, the inner sur-faces of the side walls and the top and hottom housin~s defining a partially enclosea first volume therebetween, the insert unit comprising a pair of side panels and a pair of end panels ~oined to the side panels to provide a unitary structure, each of the end panels having an opening therethrough for receiving a flow meter tube, the outer surfaces of the side panels and the end panels defining a partially enclosed second volume which is co-extensive with the first volume whereby the insert unit is flush with the meter frame when the insert unit is inserted into the flow meter frame, the openings in the end panels being positioned to axially ali~n the flow meter tube with the means in the top and bottom housing for engaging the 10w meter tube when the insert unit is flush with the flow meter frame.
The invention as claimed herein is also a variable :.
area meter insert unit for insertion into a variable area flow meter frame having a pair of opposed side walls and a top and bottom housing with means for en~aging and establishing fluid communication with a flow meter tuhe, the inner surfaces of the side walls and the top and bottom housings defining a par-tiallv enclosed first volume therebetween, the insert unit comprising side panel support means~ tube support means attached at the ends of each of the side panel support means for receiving a flow meter tube, the outer surfaces of the sidepanel support means and the tube support means defining a partially enclosed second volume which is coextensive with the first volume whereby the insert unit is flush with the meter frame when the insert unit is inserted into the flow meter frame, means on the tube support means for positioning a flow meter tube in fluid com--2a-S~'7 munication with the top and bottom housing, pressure relief means associated with the support means for releasin~ pressure in a predetermined direction, and viewing means between the side panel support means.
- 2b -iS'7 m e difficiencies present in current variable area meters are corrected by the compact, self-contained insert unit of the present invention, which is illustrated by the following drawings in which:
Figure 1 is an overall view of the insert unit located within the 5v support framew~rk, Figure 2 is a cross-sectional view of the insert unit and framework, ;
Figure 3 is a cross-sectional view along line 3-3 of Figure 2, -Figure 4 is a partial front view of the unit illustrating the magnification created by the lens portion of the insert unit;
Figures 5 and 6 illustrate valves which can be combin d with the meter unit; and Figure 7 illustrates a closure plug which is used on the meter unit when no valve is used.
lS m e insert unit 10 of this invention is adapted to fit with a generally conventional, variable area meter framework 30. Framework 30 is fabricated with conventional side members 31 and 32 connecting top housing 33 and ~ottom housing 34. Bottom housing 34 threadably receives fluid inlet fitting 36, which is sealed to the housing by seal 48.
Likewise tcp housing 33 threadably receives fluid outlet fitting 35, which is sealed to the housing by seal 47. Typically, seals 47 and 48 ;;
are 0-ring seals. Bottom housing 34 preferably is formed with a second threaded openin~ 49, which is adapted to receive valves 51 and 52 or closure plug 53. Inlet fitting 36 is in fluid communication with bores 54 and 56 in bottom housing 34. Bore 56 extends vertically fxom horizontal ~ore 54 to provide communication with the bore of rotameter flow tube 20 at its bottom end.
Top housin~ 33 is formed with a bore 57 for receiving sealing spindle 59. Spindle 59 is threaded at the upper portion 40 of bore 60, which extends through spindle 59. Upper portion 40 threadably engages screw member 37. Member 37 is aclapted to be rotated bv external means and preferably has hexa~onal driving means 38. Retaining washer 43 supports screw member 37~ Se~ling means 61, preferably an O-rin~, is retained between housin~
33 and member 37 to prevent any leakin~ of the flowin~
fluid.
Seal spindle 59 is provided with a flat portion 41 extendin~ alonq a substantial portion of its length.
Flat 41 is contacted by the end of fluid outlet fitting 35.
The imprin~ement of fitting 35 on flat 41 prevents spindle 59 from rotating when screw member 37 is rotated. The rotational motion of screw mem~er 37 is translated into the axial movement of spindle 59. ~ealin~ means 42 establishes a seal hetween the lower portion of spindle 59 and housin~
33.
- Insert unit ln is adaptecl to be inserted in frame-work 30 within the space clefined hv end housings 33 and 34 and side members 31 and 32. Insert unit 10 is comprised of side support panels 12 and 13 and end panels 14 and 15.
End panels 14 and 15 are joined to panels 12 and 13 at ~ .
-` the ends thereof and support meter tube 20 at a central location hy means of a hole 21 which receives tube 20 recessed portion 22 is formed in each encl panel 14 and 15 to receive sealing washers 45 and 46 respectively.
Recesses portion 22 also creates a resilient lip surrounclin~
hole 21 in each of the en~ panels 14 and 15 for facile insertion of tube 20 into end panel 14, Hols 21 is fixed to provicle a friction fit with tuhe 20, The resilient lip functions to ~rip tube 20 at a fixed position so that tube 20 will not slip from hole 21 and also to centrally locate tube 20 within in~ert unit 10~ ~ide panels 12 and 13 are formed with ~rooves 63 at the forward edges thereof :
; .
to facilitate removal of insert unit 10 from framework 30.
A clear, front-viewing panel is interposed between side panels 12 and 13. Slots 18 are found in sides 12 and 13 to receive panel 16. In a preferred e~bodiment panel 16 is convex lens to provide a magnifying effect to assist in reading of the indicia on tube 20.
Back panel 17 is interposed between side panels 12 and 13 and is retained within slots 19. Back panel 17 is formed from material substantially thinner than side panels 12 and 13, front panel 16 and end panels 14 and 15, and is adapted to release from slots 19 under a differential pressure which is on the order of several inches of water.
Consequently, if pressure in the fluid system causes tube 20 to explode, the excess pressure in unit 10 will cause panel 17 to move outwardly and release the then present forces and glass from the back of the rotameter. The explosion created by any tuke failure thus is controlled in a particular direction which can be chosen to minimize the danger of injury. The particular described ~mbodiment is advantageous in the process industries where rotameters are conventionally panel mounted. In those installations, it is apparent that the full force of the explosion will be directed in back of the panel, thus minimizing the chance of injury to cperators and other personnel who may be observing in front of the mounting panel.
When insert unit 10 is located within framework 30, tube 20 automatically is centered over bore 56 in housing 34 and under sealing spindle 59 and bore 60. Sealing washers 45 and 46 provide a seal between tube 20 and framework 30. In a preferred emkodiment sealing washers 45 and 46 are formed with an L,shaped transverse cross section so that they ;
function both to seal the tube and hold it in insert 10.
It is preferable to dimension insert 10 so that it fits flush within Eramework 30. Tube 20 then is centered appropriately in fr~mework 30 in a si~le operation. Then sealing spindle 50 is moved downwardly by rotating screw member 37 to force sealing washers 45 and 46 against s~7 the top and bottom of tube 20, respectively. As stated hereinbefore, flat 41 prevents spindle 59 from rotating and tube 20 renains in its insertion position. Accordln~ly~ it is no longer necessary to estimate an initial insertion position for the tube 20 wnich hopefully ~ould end with front-facing indicia when the seal was completed.
It is apparent that one insert unit can be used with a multitude of tubes with different inside diameters. Also, different shapes for the insert unit could be provided depending on the shape of the frame;wor~c into which it is to be inse~ed.
In another embodi~ent of the invention, insert 10 can be adapted to form a sealed structure about tube 20. Insert 10 can be filled with dry nitrogen or other inert gas to prevent condensation and/or frost from forming on the surface of tube 20, which might impair or even prevent accurate flow readin~s. Also, it is desired to form bottom panel 15 with a small groove in front of the front panel. That grcove facilltates rem~val of insert 10 when operations have been concluded either by means of a finger or thumb nail or an-appropriately shaped instrument, which can be inserted into the groove and pulled outwardly.
The invention has been illustrated with reference to the drawings but it will be-apparent to those skilled in the art that modifications can be made without departing from the splrit or scope of this lnventlon.
~.
Claims
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. A variable area meter insert unit for insertion into a variable area flow meter frame having a pair of opposed side walls and a top and bottom housing with means for engaging a flow meter tube, the inner surfaces of said side walls and said top and bottom housings defining a partially enclosed first volume therebetween, said insert unit comprising:
a pair of side panels; and a pair of end panels joined to said side panels to provide a unitary structure, each of said end panels having an opening there through for receiving a flow meter tube, the outer surfaces of said side panels and said end panels defining a partially enclosed second volume which is coextensive with said first volume whereby said insert unit is flush with said meter frame when said insert unit is inserted into said flow meter frame, said openings in said end panels being positioned to axially align said flow meter tube with said means in said top and bottom housing for engaging said flow meter tube when said insert unit is flush with said flow meter frame.
2. A variable area meter insert unit as in Claim 1 further comprising a front viewing panel attached between said side panels.
3. A variable area meter insert unit as in Claim 2 further comprising a back panel between said side panels.
4. An insert unit as in Claim 2 wherein said viewing panel is a magnifying lens.
5. An insert unit as in Claim 3 wherein said side panels have a longitudinal groove at their rearward edge for receiving said back panel.
5. An insert unit as in Claim 3 wherein said side panels have a longitudinal groove at their forward edge for receiving said viewing panel.
7. A variable area meter insert unit as in Claim 3 wherein said back panel has a thickness substantially less than said side panels and said viewing panel.
8. An insert unit as in Claim 7 wherein each of said end panels has a recessed portion surrounding said opening therein for receiving a sealing washer.
9. A variable area meter insert unit as in Claim 1 wherein said opening in each end ]panel is formed with a resilient lip for frictionally engaging a flow meter tube.
10. A variable area meter insert unit for insertion into a variable area flow meter frame having a pair of opposed side walls and a top and bottom housing with means for engaging and establishing fluid communication with a flow meter tube, the inner surfaces of said side walls and said top and bottom housings defining a partially enclosed first volume therebetween, said insert unit comprising: -side panel support means;
tube support means attached at the ends of each of said side panel support means for receiving a flow meter tube, the outer surfaces of said side panel support means and said tube support means defining a partially enclosed second volume which is coextensive with said first volume whereby said insert unit is flush with said meter frame when said insert unit is inserted into said flow meter frame, means on said tube support means for positioning a flow meter tube in fluid communication with said top and bottom housing;
pressure relief means associated with said support means for releasing pressure in a predetermined direction;
and viewing means between said side panel support means.
1. A variable area meter insert unit for insertion into a variable area flow meter frame having a pair of opposed side walls and a top and bottom housing with means for engaging a flow meter tube, the inner surfaces of said side walls and said top and bottom housings defining a partially enclosed first volume therebetween, said insert unit comprising:
a pair of side panels; and a pair of end panels joined to said side panels to provide a unitary structure, each of said end panels having an opening there through for receiving a flow meter tube, the outer surfaces of said side panels and said end panels defining a partially enclosed second volume which is coextensive with said first volume whereby said insert unit is flush with said meter frame when said insert unit is inserted into said flow meter frame, said openings in said end panels being positioned to axially align said flow meter tube with said means in said top and bottom housing for engaging said flow meter tube when said insert unit is flush with said flow meter frame.
2. A variable area meter insert unit as in Claim 1 further comprising a front viewing panel attached between said side panels.
3. A variable area meter insert unit as in Claim 2 further comprising a back panel between said side panels.
4. An insert unit as in Claim 2 wherein said viewing panel is a magnifying lens.
5. An insert unit as in Claim 3 wherein said side panels have a longitudinal groove at their rearward edge for receiving said back panel.
5. An insert unit as in Claim 3 wherein said side panels have a longitudinal groove at their forward edge for receiving said viewing panel.
7. A variable area meter insert unit as in Claim 3 wherein said back panel has a thickness substantially less than said side panels and said viewing panel.
8. An insert unit as in Claim 7 wherein each of said end panels has a recessed portion surrounding said opening therein for receiving a sealing washer.
9. A variable area meter insert unit as in Claim 1 wherein said opening in each end ]panel is formed with a resilient lip for frictionally engaging a flow meter tube.
10. A variable area meter insert unit for insertion into a variable area flow meter frame having a pair of opposed side walls and a top and bottom housing with means for engaging and establishing fluid communication with a flow meter tube, the inner surfaces of said side walls and said top and bottom housings defining a partially enclosed first volume therebetween, said insert unit comprising: -side panel support means;
tube support means attached at the ends of each of said side panel support means for receiving a flow meter tube, the outer surfaces of said side panel support means and said tube support means defining a partially enclosed second volume which is coextensive with said first volume whereby said insert unit is flush with said meter frame when said insert unit is inserted into said flow meter frame, means on said tube support means for positioning a flow meter tube in fluid communication with said top and bottom housing;
pressure relief means associated with said support means for releasing pressure in a predetermined direction;
and viewing means between said side panel support means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA389,976A CA1126534A (en) | 1977-10-12 | 1981-11-12 | Variable area meter unit |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US84151877A | 1977-10-12 | 1977-10-12 | |
| US841,518 | 1977-10-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1115557A true CA1115557A (en) | 1982-01-05 |
Family
ID=25285092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA313,159A Expired CA1115557A (en) | 1977-10-12 | 1978-10-11 | Variable area meter insert unit |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5462858A (en) |
| CA (1) | CA1115557A (en) |
| DE (1) | DE2844370A1 (en) |
| FR (1) | FR2406188A1 (en) |
| GB (1) | GB2006441B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4115963C2 (en) * | 1991-05-13 | 1994-09-08 | Wittmann Kunststoffgeraete | Variable area flowmeter |
| EP0540784B1 (en) * | 1991-11-06 | 2000-01-19 | The Procter & Gamble Company | Dye transfer inhibiting compositions |
| ITMI20110748A1 (en) * | 2011-05-04 | 2012-11-05 | Elesa Spa | COLUMN LEVEL INDICATOR FOR TANKS AND SIMILAR WITH MEANS OF ITS EXTERNAL APPLICATION. |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1241132B (en) * | 1955-12-02 | 1967-05-24 | Fischer & Porter Co | Float flow meter |
| DE1205299B (en) * | 1962-01-23 | 1965-11-18 | Fischer & Porter Gmbh | Flow meter |
| GB1206566A (en) * | 1968-04-22 | 1970-09-23 | F W Dwyer Mfg Co Inc | Improvements in flowmeters |
-
1978
- 1978-10-06 JP JP12277478A patent/JPS5462858A/en active Pending
- 1978-10-11 DE DE19782844370 patent/DE2844370A1/en active Granted
- 1978-10-11 CA CA313,159A patent/CA1115557A/en not_active Expired
- 1978-10-12 FR FR7829162A patent/FR2406188A1/en active Granted
- 1978-10-12 GB GB7840281A patent/GB2006441B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2406188B1 (en) | 1984-01-20 |
| GB2006441B (en) | 1982-04-15 |
| DE2844370A1 (en) | 1979-04-19 |
| GB2006441A (en) | 1979-05-02 |
| FR2406188A1 (en) | 1979-05-11 |
| JPS5462858A (en) | 1979-05-21 |
| DE2844370C2 (en) | 1987-01-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry | ||
| MKEX | Expiry |
Effective date: 19990105 |