CA1211620A - Concrete pipe sealing apparatus and method - Google Patents
Concrete pipe sealing apparatus and methodInfo
- Publication number
- CA1211620A CA1211620A CA000441337A CA441337A CA1211620A CA 1211620 A CA1211620 A CA 1211620A CA 000441337 A CA000441337 A CA 000441337A CA 441337 A CA441337 A CA 441337A CA 1211620 A CA1211620 A CA 1211620A
- Authority
- CA
- Canada
- Prior art keywords
- concrete pipe
- sealing
- insertion members
- members
- pipe
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/92—Methods or apparatus for treating or reshaping
- B28B21/94—Methods or apparatus for treating or reshaping for impregnating or coating by applying liquids or semi-liquids
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An apparatus and method for sealing the wall of a concrete pipe. The apparatus includes a frame having two longitudinally-opposed slidable carriages mounted at the horizontal top portion of the frame. Both carriages support two axially-aligned longitudinal and inwardly-extending cylindrical insertion members of a diameter slightly less than the inside diameter of the pipe. These members are movable by their respective carriage into the axial bore of the concrete pipe, sealing the same at both its ends. One of the insertion members is provided with a tube communicating with the sealed axial bore at one end and with a source of pressurized sealing fluid at its other end. The concrete pipe is first closed by the insertion members, then sealed with sealing fluid fed under pres-sure in the annular zone defined between the pipe and insertion members.
An apparatus and method for sealing the wall of a concrete pipe. The apparatus includes a frame having two longitudinally-opposed slidable carriages mounted at the horizontal top portion of the frame. Both carriages support two axially-aligned longitudinal and inwardly-extending cylindrical insertion members of a diameter slightly less than the inside diameter of the pipe. These members are movable by their respective carriage into the axial bore of the concrete pipe, sealing the same at both its ends. One of the insertion members is provided with a tube communicating with the sealed axial bore at one end and with a source of pressurized sealing fluid at its other end. The concrete pipe is first closed by the insertion members, then sealed with sealing fluid fed under pres-sure in the annular zone defined between the pipe and insertion members.
Description
:~2~
FIELD OF THE INVENTION
The present lnvention pertains to concrete pipe sealing treat~ents, more specifically to an apparatus for sealing imperfections ln a pipe and the method for carrylng out this treatment.
BACKCRO~ND OF THE INVENTION
As is known, concrete pipes are extensively used as conduits for sewage systems and varioua other underground applicationa, auch as electric vaults.
Although concrete Ls the be6t available material in terms of rigidity, durabilitly and economy~ it is by nature porous and may be flawed by sma]Ll holes, fissures, cracka, etc.
at the time of manufacture. Or, such imperfections may develop wherever the pipe is installed by the corrosive actlon of acids present in sewage effluent and the ~radual wearing action of fluids, auch as rainwater. Therefore, there will occur ab~orption of the effluent into the surroundlng subaoll, thereby poll-tlng the immediate vioinity of the pipa; also, rainwater will infiltrate the pipe, swelling ~he volume of effluent to be pumped to a sewAge treatment plant, hence ~ignificantly raiaing the cost of the pumping and aewage treatment.
Till now, the only known manner of sealing or choking a concrete pipe has been to paint, by h~nd or with a paint gun, either the exterior surface or the interlor 3urface, or both, of a concrete plpe with an epoxy-related material. Such procedure i9 clearly slow and expensive.
Yet, for the reasons cited above, it i8 important to have a fully impermeable pipe. In fact, many inatitutlons of public authority nowadays enact leglalation to enaure that concrete pipes do not leak. If they do, they are clAssified as an inferior grade and restricted to uses, such a~ culvert pipe~. Thi3 is a 1088 for the manufacturer who produces an otherwise high quality product.
.
~2~62~
OBJECTS OF THE I~V~NTION
Accordingly, lt is an important ob~ect of the present inventlon to provide a concrete plpe se~ling ~pp~ratus an~ method which effectively sealu a concrete plpe, preventing ~ny infll-tr~tion or ex-fil~ratl~n when the plpe i~ in~t~lled ln the,~
ground for use .
It is anoth,er ob~ect of' the present lnvention to provide a ~eallng appara,t,us and method of the çharacter de~crlbed, which allows continuous productlon of Healed concrete plpe~ in 'an entirely-mechanlzed manner.
~ . . . . . .
It 19 consequently B prlme ob~ect of this invention to provide choklng method nnd means for concrete pipes which wlll render the choking moat effectl~e and long lastlng.
,It 18 a further ob3ect of the lnven~ion ~o;al~low a production line operation of the concrete pipe choklng means, whereas the concrete pipes msy be choked ln an entlrely-mechanlzed manner.
It 18 another ~b~ect of the lnventlon to produce a thorou~h chokin~ ~pread on the lnner wail of ~ concrete pipe by the feeùlng of pressurized choklng fluld thereon.
S~lll another ob~ect of the lnventlon 1~ to provide an apparatus wherein the fluid used 18 recoverable wlth mlnimal waute a~ter operatlon.
Other ob~ects willbe ~ore~ppar~nt f~o~ the detalled descrlptlon of the preferred embodlmentH of the lnventlon.
SUM~ARY OF THE INVENrI~N
! The ab~ve and other ob~ects and advantages of the present lnventlon are reallzed according to a preferred embodlment comprl~lng a palr of axlally-aligned and movably, longitudlnally spaced-apart cylindrical insertion members. Both cylindricsl lnsertion member0`
are preferably hollow and adapted to be moved between ~n outer posi'tion and ~n lnner posltlon. Carrlage means, preferably connected \
1~ LÇ;20 ~o ~ ~r~me ~re adapted to move the insertlon member~
longitudlnally between these two positi~ns.
Tt-~ outer dl~,leters oE both cyllndrical lnsertlon members i8 sllghtly 1~98 thsn the outer diameter of a concrete plpe to be sealed. Also, the comblned lengths of the cyllndrlcal lnsertlon members 1~ ~llghtly lesI~ than the length of ~he concrete pipe. Furthermore, both ends of both cyllndrlcal lnsertlon members ere closed and thelr outer ends are adapted to sealinRly close both ends o the concrete plpe, Sesling fluid introductlon meQns are provided in one insertion member.
Preferably, the carrlage means and the frame are supported by four flo~r engsging leg~, one at each corner of the frame.
The top area of the frame 18 preferably rectangulsr dnd has mounted thereon 8 pair of longltudinally-orlented and slidable horizontal carriages 3ituated at the opposite longltudinal ends of the frame. Both carri~ges can slide from an outer position to sn inner ?osltion ad~acent the corre~pondlng palr of floor-engeglng legs.
The outer end of both carrlages ha8 a ri8idly-~ecured, ~ downwardly-extendlng support assembly which terminates above floor level. Both of these ~s~emblie~ have rigldly sec~red thereto at their lower portion~ one of the horizon~l inwardly and longltudinally extending cylindrical insertion member8.
` Power means are provlded to move both carrlage~
snd ~heir respective support assemblles longitudinally~
A concrete plpe support means 19 dlsposed transversely and centrally of the frame, belng adàpted to support at least one concrete pipe in horl7ont~1 longitudinal position, such that the axial bore of ~he pipe is in preclse registry wl~h both cyllndrlcal insertlon member3. Preferably, thls support meens 19 in the form of a long transverse trestle, whereby a plurallty of pipes can be moved one afeer the other lnto the frame to be sealed thereat in an entirely- mechanized manner.
__ - 121~62~
_ The sealing fluid introduction means preferably consists of a small diameter tube, or conduit, extending through ~he snid one insertion member. One end of the tube forms a hole in the inner wall of the cylinder~ while the opposi~e end projects outwardly from the outer end wall of the cylinder and 1~ operatlvely connected to a supply ofsloaq~ln~ fluid.
Preferably, valve means ~re provided to remove trApped air in the sealed bore of the pipe.
The method of sealing a concrete pipe by means of the above-described apparatus comprlses the steps of:
a) retracting both carriages outwardly to their respective outer limit positions, thereby also retractlng the cylindrlcal insertion members;
b) positioning a concrete pipe to be erected on the support means and in axial registry with the cylindrical insertion members, c) engaging both cylindrical insertion members into the axial line of the concrete pipe, whereby the axial bore is sealed :Ibut at both its ends. In this operative posltlon of the cyllndrical members, their respective inner walls , are preferably in close but non-abutting relationship to minimalize the free internal 4pace of the axial bore;
d) in~ectLng, under pre~sure, a liquid-sealing material through the tube o the one cyllndrical member and through the hole of the outer face of the latter, thus into the annular zone between the insertion members and the inside wall of the pipe~
The sealing material, preferably water-dissolved latex having a viscosity close to that of water, will adequately cover and seal the entire inner wall of the concrete pipe permanently.
Since the free space of the axial bore is small, little aealing liquid will be used.
Once the sealing step is completed, the procédure i~
~Z~1620 fol10wed in reverse until the next concret~ pipe ia in .
pO8 i tion~
~RIEF DESCRIPTION OF TtlE DRAWIN~S
The above will be more clearly understood by referring to the description of the preferred embodiment and to the annexed drawings, in whlch:
~ Figure l is a side elevati.on of the ~ealing apparatus, showing the cylindrical insertiom member~ in retracted position;
Fl~ure 2 i8 a view similar to that of Figure l showing the cyIindrical insertion members in sealing engag~d position in the axial bore of a concrete pipe;
Figure 3 is & top plan view of tha apparatus oi .
Figure l;
Flgure 4 is an end view, taken at the right side of the apparatus of Figure l, also showing the trestle cflrrying a plurality of concrete pipes;
Figure 5 is a longitudinally cross-sectioned elevation of a concrete pipe, also showing the two cylindrical insertion members inserted in the axial bore of the~ pipe;
Figure 6 18 a cross-sectional view taken along line 6-6 of Figure 5; and Figure 7 is an enlarged view of the upper middle area of Figure 5, showing how the sealing fluid circulates to seal the inner wall of a concrete pipe.
, Like numerals indicate likeelements throughout the drawings.
DESCRIPTION OF THE PREFERRED EMBODIMENT
,, _ Referring to Figures l to 4 inclusively, there is shown the apparatus of the invention, comprising an upright 3Q frame lO, having a rectangular flat upper portion supported by two longitudinally-spaced pairs of rigid upright po~ts 12, 12, and 14, l4. These posts rest on a floor l5 and preferably each has a base 13.
~2~ ;20 The upper portion of frsme 10 i9 deflned by a palr of lon~ dln~l beams 16 18 two end palrs of tran~verAe be~ms 20 22 and 28 30 re~pect~vely ~8 well ~ n mlddle pAir of trun~-verse be~m~ 24 26. All of thas~ transverse beami ~re par~ilel nnd ri~ldly aecured at thel~ Qpposlte end~ to be~m~ 16, 1~. (cf. Flg.
3) The rl~ht ~lde ~rea of the upper portion of frame 10 hAs a pair of longltudlnal hollow ba~s 40 42 rlgldly secured, ns by wel~lng, ~o the top surface~ of tr~n~ver~e be~ms 22 and 24.
BarY 40, 4~ haYe open outer ends~ prefer~bly flu8h Wlth the outer ide of beam 22 .
A f lrYt carrlagè 19 adapted to sllde longltudlnally in parallel bars 40, 42 and is formed by a palr of rlgid bsrs 32, 34 rigidly interconnected at theik outer ends by ~ llnk 36 and an upright flat plate 38 A power mean~ to 811de thls ~ir~t carri~ge i~ provided~ consl8tlng of a hydrsullc pi~ton 62 having a pl~ton rod 6~' plvotally secured to llnk 36, while the piaton 62 is itself pivotally secured to the central portion of transverse beam 24.
.Sl~ rly, the left-slde area of the upper portion of ~ra~e 10 1~ provided wlth a second palr of lon8itudinal, parallel hollow barY 52, 54 ri.~ldly Yecured to the top surface~ of transverse beams 26, ~8. Bars 52, 54 also have open outer enda which are flush wlth.the outer slde of beam 28.
Hollow bars 52, 54 ~re more closely spsced together than hollow bars 40j 42, 80 as not to lnterfere wlth the latter.
A second carriage 19 adapted for slidable displacement wlthln bars 52, 54, being formed of a palr of parallel rlgld bars 44 and 46 rlgidly lnterconnec~ed ~C thelr outer ends by another link 48 and a ~ertically-orlented flat plate 50. Ths..powei means to operate the second carrlage also conslsts of a hydraullc - piston 70 plvotally secured to be~m 26. The rod 70' of pl~ton 70 i8 in turn pivotally Yecured to llnk 48.
, --~
3~Z~620 Both th~ first and secc~ld car.rlages are provic~3d with a support assembly. The latter includes, for the first carrlage, a relatively thick central plate 56 having its upper end ~igidly fixed to link 36. Plate 56 is bent inwardly angularly at 56' a~d bent a~ain downwardly at 56", tern~natlng abovP floor l~vel, Plate 56 is reinforced by a palr of xigid struts 58, arran~ed in a V.
m e support assembly for the sea~d carriage is slmilar, except that plate 64 is vertically sl r~1ght, being rigi.dly secured at its upper edge to link nE~oer 48. Plate 64 is reinforced by another pair of rigid struts 66.
m e first and secon~ support as~3nblie~ are designed tD
rigidly q~pport cylindrical inserti~ members 60 and 68, respect-ively. The ~irst insertion member 60 ls r1yidly secured to a plague 72 which is affixed to the inner kottxlm face of plate 56, thereby sealing th~ outer end of member 60. (the l~i:ter is preferably hollcw~
The inner end of r~ember 60 is also se~led by a wall 60', as clearly ~h~wn in Figure 5. The outer end of member 60 is further provlded with a tap red`annular oollar 60" ~hich preclsely sealingly fits into the fem~le e~ouchure of a concrete plpe 76.
The second insertion member 68 is also preferably hollcw, being of the sa~e diameter and length as first memker 60. It~ inner end is rigidlyt sealingly secured to a sacond pla~ue 74. The latter is fixedly attached to the inner botbom faoe of plate 64. To further provi~e a tight ~eal at thP outer end of seccnd ~nsertian member 6~, an annulclr gasket 79' is disposed between plaque 74 and the outer rim of the member 68 (ef. Fig. 5).
B~th insertlon memhers are in preclse langitudinal axlal alignment with each other and æ e adapbsd to fit into the caxial alignment with each other c~nd are c~dapted to fi~ into the a~ial bore oE a~lcrete plpe 76. This pipe may cr may not haYe reinforc-ng rads and has an inner diameter which is slightly.greater than the outer diameter of insertic~n members 60, 68. The aqmbinecl lengths of members 60, 68 ls les~ than t~.e lenc~th of the pipe 76, ~.2~
such that a space 78 is formed between the two members 60, 68 when they are in fully-sealing inserted position (best seen in Fig. 5).
Concrete pipe 76 i8 supported on the support meanH, shown as an elongated transverse trestle 80 which extends throu~h the middle of frame 10. Trestle 80 ~hu~ a]lows for continuou3 production of ~ealed pipes, being formed with a central depression 80~ onto whLch a plpe 76 iB ro~led for the sealing treatment ~cf. Fig. 4).
Inserti.on member 68 i9 formed with a small diameter longi-tudinal conduit 82 opening out into a hole 82~ made i~ inner wall 68', and connected to a pressurized sealing fluid supp]y sou~ce (not shown) at its other end.
Referring finally to Fig.7, the arrows indicate tha flow of fluid i~suing from conduit 82. The fluid is water-~
dissolved latex or copolymers of polyvinyl acetate; the solution will adequately seal all the imperfection3 ~uch as ~mall air pockec~, ~racks, etc. ln concrete pipe 76 AB shown, the fluid flows lnto space 78, thence into the gap 84 between insertlon members 60, 68 and the inner wall 76' of-the pipe. Any air compre33ed and trapped within the pipe can be released by open~ng a manual valve 85 (Fig. 5) communicating with gap 84 by a pipe 86.
It is to be noted that the apparatus described above lends itself to recuperation of mo3t of the unused latex solution by a ~uitable recovery means (not shown).
It is to be further noted that the apparatus can be provided in different sizes to accommodate concrete plpe~ made in varlou3 st~ndardi2ed dimension3.
FIELD OF THE INVENTION
The present lnvention pertains to concrete pipe sealing treat~ents, more specifically to an apparatus for sealing imperfections ln a pipe and the method for carrylng out this treatment.
BACKCRO~ND OF THE INVENTION
As is known, concrete pipes are extensively used as conduits for sewage systems and varioua other underground applicationa, auch as electric vaults.
Although concrete Ls the be6t available material in terms of rigidity, durabilitly and economy~ it is by nature porous and may be flawed by sma]Ll holes, fissures, cracka, etc.
at the time of manufacture. Or, such imperfections may develop wherever the pipe is installed by the corrosive actlon of acids present in sewage effluent and the ~radual wearing action of fluids, auch as rainwater. Therefore, there will occur ab~orption of the effluent into the surroundlng subaoll, thereby poll-tlng the immediate vioinity of the pipa; also, rainwater will infiltrate the pipe, swelling ~he volume of effluent to be pumped to a sewAge treatment plant, hence ~ignificantly raiaing the cost of the pumping and aewage treatment.
Till now, the only known manner of sealing or choking a concrete pipe has been to paint, by h~nd or with a paint gun, either the exterior surface or the interlor 3urface, or both, of a concrete plpe with an epoxy-related material. Such procedure i9 clearly slow and expensive.
Yet, for the reasons cited above, it i8 important to have a fully impermeable pipe. In fact, many inatitutlons of public authority nowadays enact leglalation to enaure that concrete pipes do not leak. If they do, they are clAssified as an inferior grade and restricted to uses, such a~ culvert pipe~. Thi3 is a 1088 for the manufacturer who produces an otherwise high quality product.
.
~2~62~
OBJECTS OF THE I~V~NTION
Accordingly, lt is an important ob~ect of the present inventlon to provide a concrete plpe se~ling ~pp~ratus an~ method which effectively sealu a concrete plpe, preventing ~ny infll-tr~tion or ex-fil~ratl~n when the plpe i~ in~t~lled ln the,~
ground for use .
It is anoth,er ob~ect of' the present lnvention to provide a ~eallng appara,t,us and method of the çharacter de~crlbed, which allows continuous productlon of Healed concrete plpe~ in 'an entirely-mechanlzed manner.
~ . . . . . .
It 19 consequently B prlme ob~ect of this invention to provide choklng method nnd means for concrete pipes which wlll render the choking moat effectl~e and long lastlng.
,It 18 a further ob3ect of the lnven~ion ~o;al~low a production line operation of the concrete pipe choklng means, whereas the concrete pipes msy be choked ln an entlrely-mechanlzed manner.
It 18 another ~b~ect of the lnventlon to produce a thorou~h chokin~ ~pread on the lnner wail of ~ concrete pipe by the feeùlng of pressurized choklng fluld thereon.
S~lll another ob~ect of the lnventlon 1~ to provide an apparatus wherein the fluid used 18 recoverable wlth mlnimal waute a~ter operatlon.
Other ob~ects willbe ~ore~ppar~nt f~o~ the detalled descrlptlon of the preferred embodlmentH of the lnventlon.
SUM~ARY OF THE INVENrI~N
! The ab~ve and other ob~ects and advantages of the present lnventlon are reallzed according to a preferred embodlment comprl~lng a palr of axlally-aligned and movably, longitudlnally spaced-apart cylindrical insertion members. Both cylindricsl lnsertion member0`
are preferably hollow and adapted to be moved between ~n outer posi'tion and ~n lnner posltlon. Carrlage means, preferably connected \
1~ LÇ;20 ~o ~ ~r~me ~re adapted to move the insertlon member~
longitudlnally between these two positi~ns.
Tt-~ outer dl~,leters oE both cyllndrical lnsertlon members i8 sllghtly 1~98 thsn the outer diameter of a concrete plpe to be sealed. Also, the comblned lengths of the cyllndrlcal lnsertlon members 1~ ~llghtly lesI~ than the length of ~he concrete pipe. Furthermore, both ends of both cyllndrlcal lnsertlon members ere closed and thelr outer ends are adapted to sealinRly close both ends o the concrete plpe, Sesling fluid introductlon meQns are provided in one insertion member.
Preferably, the carrlage means and the frame are supported by four flo~r engsging leg~, one at each corner of the frame.
The top area of the frame 18 preferably rectangulsr dnd has mounted thereon 8 pair of longltudinally-orlented and slidable horizontal carriages 3ituated at the opposite longltudinal ends of the frame. Both carri~ges can slide from an outer position to sn inner ?osltion ad~acent the corre~pondlng palr of floor-engeglng legs.
The outer end of both carrlages ha8 a ri8idly-~ecured, ~ downwardly-extendlng support assembly which terminates above floor level. Both of these ~s~emblie~ have rigldly sec~red thereto at their lower portion~ one of the horizon~l inwardly and longltudinally extending cylindrical insertion member8.
` Power means are provlded to move both carrlage~
snd ~heir respective support assemblles longitudinally~
A concrete plpe support means 19 dlsposed transversely and centrally of the frame, belng adàpted to support at least one concrete pipe in horl7ont~1 longitudinal position, such that the axial bore of ~he pipe is in preclse registry wl~h both cyllndrlcal insertlon member3. Preferably, thls support meens 19 in the form of a long transverse trestle, whereby a plurallty of pipes can be moved one afeer the other lnto the frame to be sealed thereat in an entirely- mechanized manner.
__ - 121~62~
_ The sealing fluid introduction means preferably consists of a small diameter tube, or conduit, extending through ~he snid one insertion member. One end of the tube forms a hole in the inner wall of the cylinder~ while the opposi~e end projects outwardly from the outer end wall of the cylinder and 1~ operatlvely connected to a supply ofsloaq~ln~ fluid.
Preferably, valve means ~re provided to remove trApped air in the sealed bore of the pipe.
The method of sealing a concrete pipe by means of the above-described apparatus comprlses the steps of:
a) retracting both carriages outwardly to their respective outer limit positions, thereby also retractlng the cylindrlcal insertion members;
b) positioning a concrete pipe to be erected on the support means and in axial registry with the cylindrical insertion members, c) engaging both cylindrical insertion members into the axial line of the concrete pipe, whereby the axial bore is sealed :Ibut at both its ends. In this operative posltlon of the cyllndrical members, their respective inner walls , are preferably in close but non-abutting relationship to minimalize the free internal 4pace of the axial bore;
d) in~ectLng, under pre~sure, a liquid-sealing material through the tube o the one cyllndrical member and through the hole of the outer face of the latter, thus into the annular zone between the insertion members and the inside wall of the pipe~
The sealing material, preferably water-dissolved latex having a viscosity close to that of water, will adequately cover and seal the entire inner wall of the concrete pipe permanently.
Since the free space of the axial bore is small, little aealing liquid will be used.
Once the sealing step is completed, the procédure i~
~Z~1620 fol10wed in reverse until the next concret~ pipe ia in .
pO8 i tion~
~RIEF DESCRIPTION OF TtlE DRAWIN~S
The above will be more clearly understood by referring to the description of the preferred embodiment and to the annexed drawings, in whlch:
~ Figure l is a side elevati.on of the ~ealing apparatus, showing the cylindrical insertiom member~ in retracted position;
Fl~ure 2 i8 a view similar to that of Figure l showing the cyIindrical insertion members in sealing engag~d position in the axial bore of a concrete pipe;
Figure 3 is & top plan view of tha apparatus oi .
Figure l;
Flgure 4 is an end view, taken at the right side of the apparatus of Figure l, also showing the trestle cflrrying a plurality of concrete pipes;
Figure 5 is a longitudinally cross-sectioned elevation of a concrete pipe, also showing the two cylindrical insertion members inserted in the axial bore of the~ pipe;
Figure 6 18 a cross-sectional view taken along line 6-6 of Figure 5; and Figure 7 is an enlarged view of the upper middle area of Figure 5, showing how the sealing fluid circulates to seal the inner wall of a concrete pipe.
, Like numerals indicate likeelements throughout the drawings.
DESCRIPTION OF THE PREFERRED EMBODIMENT
,, _ Referring to Figures l to 4 inclusively, there is shown the apparatus of the invention, comprising an upright 3Q frame lO, having a rectangular flat upper portion supported by two longitudinally-spaced pairs of rigid upright po~ts 12, 12, and 14, l4. These posts rest on a floor l5 and preferably each has a base 13.
~2~ ;20 The upper portion of frsme 10 i9 deflned by a palr of lon~ dln~l beams 16 18 two end palrs of tran~verAe be~ms 20 22 and 28 30 re~pect~vely ~8 well ~ n mlddle pAir of trun~-verse be~m~ 24 26. All of thas~ transverse beami ~re par~ilel nnd ri~ldly aecured at thel~ Qpposlte end~ to be~m~ 16, 1~. (cf. Flg.
3) The rl~ht ~lde ~rea of the upper portion of frame 10 hAs a pair of longltudlnal hollow ba~s 40 42 rlgldly secured, ns by wel~lng, ~o the top surface~ of tr~n~ver~e be~ms 22 and 24.
BarY 40, 4~ haYe open outer ends~ prefer~bly flu8h Wlth the outer ide of beam 22 .
A f lrYt carrlagè 19 adapted to sllde longltudlnally in parallel bars 40, 42 and is formed by a palr of rlgid bsrs 32, 34 rigidly interconnected at theik outer ends by ~ llnk 36 and an upright flat plate 38 A power mean~ to 811de thls ~ir~t carri~ge i~ provided~ consl8tlng of a hydrsullc pi~ton 62 having a pl~ton rod 6~' plvotally secured to llnk 36, while the piaton 62 is itself pivotally secured to the central portion of transverse beam 24.
.Sl~ rly, the left-slde area of the upper portion of ~ra~e 10 1~ provided wlth a second palr of lon8itudinal, parallel hollow barY 52, 54 ri.~ldly Yecured to the top surface~ of transverse beams 26, ~8. Bars 52, 54 also have open outer enda which are flush wlth.the outer slde of beam 28.
Hollow bars 52, 54 ~re more closely spsced together than hollow bars 40j 42, 80 as not to lnterfere wlth the latter.
A second carriage 19 adapted for slidable displacement wlthln bars 52, 54, being formed of a palr of parallel rlgld bars 44 and 46 rlgidly lnterconnec~ed ~C thelr outer ends by another link 48 and a ~ertically-orlented flat plate 50. Ths..powei means to operate the second carrlage also conslsts of a hydraullc - piston 70 plvotally secured to be~m 26. The rod 70' of pl~ton 70 i8 in turn pivotally Yecured to llnk 48.
, --~
3~Z~620 Both th~ first and secc~ld car.rlages are provic~3d with a support assembly. The latter includes, for the first carrlage, a relatively thick central plate 56 having its upper end ~igidly fixed to link 36. Plate 56 is bent inwardly angularly at 56' a~d bent a~ain downwardly at 56", tern~natlng abovP floor l~vel, Plate 56 is reinforced by a palr of xigid struts 58, arran~ed in a V.
m e support assembly for the sea~d carriage is slmilar, except that plate 64 is vertically sl r~1ght, being rigi.dly secured at its upper edge to link nE~oer 48. Plate 64 is reinforced by another pair of rigid struts 66.
m e first and secon~ support as~3nblie~ are designed tD
rigidly q~pport cylindrical inserti~ members 60 and 68, respect-ively. The ~irst insertion member 60 ls r1yidly secured to a plague 72 which is affixed to the inner kottxlm face of plate 56, thereby sealing th~ outer end of member 60. (the l~i:ter is preferably hollcw~
The inner end of r~ember 60 is also se~led by a wall 60', as clearly ~h~wn in Figure 5. The outer end of member 60 is further provlded with a tap red`annular oollar 60" ~hich preclsely sealingly fits into the fem~le e~ouchure of a concrete plpe 76.
The second insertion member 68 is also preferably hollcw, being of the sa~e diameter and length as first memker 60. It~ inner end is rigidlyt sealingly secured to a sacond pla~ue 74. The latter is fixedly attached to the inner botbom faoe of plate 64. To further provi~e a tight ~eal at thP outer end of seccnd ~nsertian member 6~, an annulclr gasket 79' is disposed between plaque 74 and the outer rim of the member 68 (ef. Fig. 5).
B~th insertlon memhers are in preclse langitudinal axlal alignment with each other and æ e adapbsd to fit into the caxial alignment with each other c~nd are c~dapted to fi~ into the a~ial bore oE a~lcrete plpe 76. This pipe may cr may not haYe reinforc-ng rads and has an inner diameter which is slightly.greater than the outer diameter of insertic~n members 60, 68. The aqmbinecl lengths of members 60, 68 ls les~ than t~.e lenc~th of the pipe 76, ~.2~
such that a space 78 is formed between the two members 60, 68 when they are in fully-sealing inserted position (best seen in Fig. 5).
Concrete pipe 76 i8 supported on the support meanH, shown as an elongated transverse trestle 80 which extends throu~h the middle of frame 10. Trestle 80 ~hu~ a]lows for continuou3 production of ~ealed pipes, being formed with a central depression 80~ onto whLch a plpe 76 iB ro~led for the sealing treatment ~cf. Fig. 4).
Inserti.on member 68 i9 formed with a small diameter longi-tudinal conduit 82 opening out into a hole 82~ made i~ inner wall 68', and connected to a pressurized sealing fluid supp]y sou~ce (not shown) at its other end.
Referring finally to Fig.7, the arrows indicate tha flow of fluid i~suing from conduit 82. The fluid is water-~
dissolved latex or copolymers of polyvinyl acetate; the solution will adequately seal all the imperfection3 ~uch as ~mall air pockec~, ~racks, etc. ln concrete pipe 76 AB shown, the fluid flows lnto space 78, thence into the gap 84 between insertlon members 60, 68 and the inner wall 76' of-the pipe. Any air compre33ed and trapped within the pipe can be released by open~ng a manual valve 85 (Fig. 5) communicating with gap 84 by a pipe 86.
It is to be noted that the apparatus described above lends itself to recuperation of mo3t of the unused latex solution by a ~uitable recovery means (not shown).
It is to be further noted that the apparatus can be provided in different sizes to accommodate concrete plpe~ made in varlou3 st~ndardi2ed dimension3.
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED, ARE DEFINED AS FOLLOWS:
1. An apparatus for sealing the inner wall of a concrete pipe comprising: a pair of axially-aligned and movably, longitudinally spaced-apart cylindrical insertion members;
said insertion members having an outer diameter slightly less than the inside diameter of a concrete pipe to be sealed and having a combined length slightly less than the length of said concrete pipe; carriage means to removably insert said insertion members into the axial bore of said concrete pipe; sealing means at the outer end of each said insertion members, whereby the said axial bore of said concrete pipe is completely sealed by said insertion members when the latter are fully inserted therein; a concrete pipe support means adapted to support at least one concrete pipe in axial registry with said cylindrical insertion members; sealing fluid introduction means provided in one of said cylindrical insertion members.
said insertion members having an outer diameter slightly less than the inside diameter of a concrete pipe to be sealed and having a combined length slightly less than the length of said concrete pipe; carriage means to removably insert said insertion members into the axial bore of said concrete pipe; sealing means at the outer end of each said insertion members, whereby the said axial bore of said concrete pipe is completely sealed by said insertion members when the latter are fully inserted therein; a concrete pipe support means adapted to support at least one concrete pipe in axial registry with said cylindrical insertion members; sealing fluid introduction means provided in one of said cylindrical insertion members.
2. An apparatus for sealing the inner wall of a concrete pipe as defined in claim 1, wherein said carriage means comprises an upright frame supported by two pairs of floor-engaging, longitudinally-spaced rigid posts and having a horizontal upper portion; a first and a second carriage located at the longitudinal opposite ends of said upper portion, respectively, and each adapted for slidable longitudinal movement between an outer retracted position and an inner position adjacent the cor-responding said pair of posts; each said carriage having a down-wardly-extending support assembly rigidly secured to its outer end; each said support assembly terminating above the level of said floor and rigidly carrying at its lower portion a first and a second longitudinally inwardly extending said cylindrical insertion member respectively; power means to move said first and second carriages; both of said insertion members having an inner wall at their inner ends.
3. An apparatus as defined in claim 2, wherein said sealing means consists of a rigid plaque affixed to the said outer end of said first and said second insertion members, each said plaque being rigidly secured to said lower portion of its respective said support assembly; said first insertion member further including a tapered annular collar precisely sealingly fitting into the female embouchure of said concrete pipe; said second insertion member further including an annular gasket disposed be-tween said plaque and the outer rim of the said second insertion member, said gasket sealingly fitting against the male opening of said concrete pipe.
4. An apparatus as defined in claim 1 or 2, wherein said pipe support means is a transverse elongated trestle having a central depression.
5. An apparatus as defined in claim 2, wherein said sealing fluid introduction means consists of a tube communicating with a hole made in the said inner wall of one of said cylindrical insertion members; said tube being connected to a pressurized supply of sealing fluid at its other end.
6. A method of sealing the inner wall of a concrete pipe comprising the steps:
a) sealing both ends of the concrete pipe with two axially-aligned cylindrical insertion members;
b) injecting sealing fluid under pressure into the sealed axial bore of said concrete pipe, through a tube formed in one of said cylindrical injection members, said tube communicating with said sealed axial bore, and also with a pressurized source of sealing fluid.
a) sealing both ends of the concrete pipe with two axially-aligned cylindrical insertion members;
b) injecting sealing fluid under pressure into the sealed axial bore of said concrete pipe, through a tube formed in one of said cylindrical injection members, said tube communicating with said sealed axial bore, and also with a pressurized source of sealing fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000441337A CA1211620A (en) | 1983-11-16 | 1983-11-16 | Concrete pipe sealing apparatus and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000441337A CA1211620A (en) | 1983-11-16 | 1983-11-16 | Concrete pipe sealing apparatus and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1211620A true CA1211620A (en) | 1986-09-23 |
Family
ID=4126544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000441337A Expired CA1211620A (en) | 1983-11-16 | 1983-11-16 | Concrete pipe sealing apparatus and method |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1211620A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997020668A1 (en) * | 1995-12-05 | 1997-06-12 | Assotubi Ecologica S.R.L. | Improved process and equipment for lining concrete pipes |
-
1983
- 1983-11-16 CA CA000441337A patent/CA1211620A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997020668A1 (en) * | 1995-12-05 | 1997-06-12 | Assotubi Ecologica S.R.L. | Improved process and equipment for lining concrete pipes |
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