CN111421656A - Integrally-drawing type small box girder hydraulic internal mold and mold retracting method - Google Patents
Integrally-drawing type small box girder hydraulic internal mold and mold retracting method Download PDFInfo
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- CN111421656A CN111421656A CN202010457367.1A CN202010457367A CN111421656A CN 111421656 A CN111421656 A CN 111421656A CN 202010457367 A CN202010457367 A CN 202010457367A CN 111421656 A CN111421656 A CN 111421656A
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- 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
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/28—Cores; Mandrels
- B28B7/30—Cores; Mandrels adjustable, collapsible, or expanding
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- 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
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/28—Cores; Mandrels
- B28B7/285—Core puller
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Abstract
The invention relates to the field of bridge construction, in particular to an integral drawing type small box girder hydraulic internal mold and a mold retracting method, which comprises a middle girder, side templates, a bottom template and a top template, and has the advantages that when the box girder template is disassembled, the top template, the bottom template and the side templates are sequentially moved and recovered in place through a top mold oil cylinder, a bottom mold oil cylinder and a side mold oil cylinder, the cross section size of the whole box girder template is smaller than the size of an inner hole of the box girder, then a jack is used for lifting the box girder template upwards for a certain distance to push a steel wheel plate with steel wheels to the lower part of the box girder template, then the box girder template is placed on the steel wheel, a winch is used for sequentially drawing the box girder template and the steel wheel plate out of the inner hole of the box girder, the operation is convenient and convenient, the full hydraulic automatic mold retracting can be realized, the manual operation of entering the inner hole of the box girder and the internal mold detaching operation is not needed, the box girder template can be integrally drawn out of the box girder, the labor intensity of workers is reduced, the safety risk is reduced, and the construction time is greatly saved.
Description
Technical Field
The invention relates to the field of bridge construction, in particular to an integrally-drawn small box girder hydraulic internal mold and a mold retracting method.
Background
For the pouring of the small prefabricated box girder with the span of more than 25m, a pull-type internal mold is adopted at present, the internal mold can only be pulled in two pieces, namely a left pull-type internal mold and a right pull-type internal mold, the integral mold folding and pulling cannot be realized, the assembly and disassembly of the box girder template are carried out by manually entering a narrow internal mold space, and the operation is very inconvenient; meanwhile, the temperature of the inner mold is very high, so that the inner mold can have adverse effects on the body of a worker.
Disclosure of Invention
The invention provides an integrally-drawing small box girder hydraulic internal mold and a mold retracting method, which aim to solve the problem that the assembly and disassembly of a box girder template in the prior art are very inconvenient because the assembly and disassembly operation needs to be carried out manually in a narrow internal mold space.
The invention adopts the following technical scheme: the hydraulic internal mold of the integrally-drawn small box girder comprises a middle girder, side templates, a bottom template and a top template, wherein the side templates and the bottom template are respectively and symmetrically arranged on two sides of the middle girder, and the top template is arranged right above an upper cross beam of the middle girder;
the side templates, the bottom template and the top template are movably arranged on the outer side of the middle beam, and after the side templates, the bottom template and the top template are completely moved outwards and unfolded, the side templates, the bottom template and the top template are mutually connected to form a section of box girder inner mold in an isosceles trapezoid structure;
the side templates are slidably arranged on two sides of the middle beam, a plurality of side template oil cylinders are connected to the surface of one side of each side template close to the middle beam, and the side template oil cylinders are fixed on the upper cross beam;
the bottom surface of the top template is connected with a plurality of top template oil cylinders fixed on the upper cross beam, and the top template is vertically arranged right above the upper cross beam through the top template oil cylinders;
the bottom die plate is rotatably arranged on two sides of the middle beam, one side of the bottom die plate is hinged with the lower cross beam of the middle beam, and the other side of the bottom die plate is rotatably connected with the upper cross beam of the middle beam through a bottom die supporting mechanism;
the bottom die supporting mechanism comprises a bottom die supporting connecting rod, a connecting shaft block and a mounting plate, wherein two ends of the bottom die supporting connecting rod are hinged to the bottom die plate and the connecting shaft block respectively, the connecting shaft block can be slidably arranged on the mounting plate, and the mounting plate is fixed between the lower cross beam and the upper cross beam.
As a further improvement, the mutually connected joint surfaces of the side template, the bottom template and the top template are all cut into an angle.
As a further improvement, limiting blocks are arranged on the tangent planes at an angle of 45 degrees on the top template and the two bottom templates, limiting grooves matched with the limiting blocks are correspondingly arranged on the tangent planes at an angle of 45 degrees on the two side templates, and the limiting blocks are respectively embedded into the limiting grooves after the top template, the bottom template and the side templates are completely unfolded and mutually linked.
As a further improvement, the bottom die supporting mechanism further comprises a bottom die oil cylinder and a chute, the top of the coupling block is connected with the bottom die oil cylinder fixed on the upper cross beam, and the coupling block is slidably arranged in the chute on the mounting plate through the bottom die oil cylinder.
As a further improvement, a side die guide rod is fixedly arranged on one side surface of the side die plate close to the middle beam through a connecting plate, and the side die guide rod is slidably arranged in a side die guide rod sleeve fixed on the middle beam.
As a further improvement, a plurality of support rods are connected between the lower cross beam and the upper cross beam.
As a further improvement, the length of a section of box girder inner mold which is in an isosceles trapezoid structure and is formed by mutual connection between the side mold plate, the bottom mold plate and the top mold plate is m, the box girder mold plate is formed by mutually splicing a plurality of sections of box girder inner molds, supports are respectively fixed on the lower cross beams of the two sections of box girder inner molds on the two ends of the box girder mold plate, the supports are in a shape, the middle parts of the two supports respectively extend out of the end surfaces of the box girder mold plate, the inward sunken parts of the supports form accommodating spaces, and the accommodating spaces are used for placing jacks.
A mould retracting method of an integrally-drawn small box girder hydraulic internal mould is characterized by comprising the following steps: step one, when a box girder casting is finished and a box girder template on a box girder inner hole needs to be disassembled, a plurality of side mold oil cylinders, top mold oil cylinders and bottom mold oil cylinders are all communicated with an external hydraulic station manually through quick change connectors; secondly, driving a top formwork oil cylinder of each section of box girder internal mold to drive a top formwork to vertically move downwards and recover in place through an external hydraulic station, as shown in the attached figure 8; thirdly, enabling a bottom die oil cylinder of each section of box girder inner die to drive a connecting shaft block and a bottom die supporting connecting rod to move upwards, and enabling a bottom die plate to rotate inwards and recover in place, as shown in the attached drawing 9; fourthly, finally, the side die oil cylinders of the inner die of each section of the box girder drive the side die plates to move inwards to be recovered in place, and meanwhile, the side die guide rods on the side die plates slide along the side die guide rod sleeves, as shown in the attached drawing 10; fifthly, after the side templates, the bottom templates and the top templates of the inner mold of each section of the box girder are moved and recovered, the distance between the box girder templates and the top surface of the inner hole of the box girder is 140mm, then a jack is placed in the accommodating space, and the box girder templates are lifted upwards by 120mm by the jack; sixthly, pushing the steel wheel plate provided with the steel wheels to the lower part of the box girder template, and slightly placing the box girder template on the steel wheels through a jack; seventhly, drawing the box girder template out of the box girder inner hole by using a winch, and detaching a section of box girder inner mold from the box girder template after drawing a section of box girder inner mold; and eighthly, taking the steel wheel plate out of the inner hole of the box girder to finish the disassembly work of the box girder template after the box girder template is completely drawn out.
From the above description of the structure of the present invention, compared with the prior art, the present invention has the following advantages: when the box girder template needs to be disassembled, the top template, the bottom template and the side mold cylinders are sequentially moved and recovered in place through the top mold cylinder, the bottom mold cylinder and the side mold cylinders, at the moment, the cross section size of the whole box girder template is smaller than the size of an inner hole of the box girder, then the box girder template is upwards jacked for a certain distance by using a jack, a steel wheel plate with steel wheels is pushed to the lower part of the box girder template, the box girder template is placed on the steel wheels, and the box girder template and the steel wheel plate are sequentially pulled out from the inner hole of the box girder by using a winch.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a rear view structural diagram of the present invention.
Fig. 3 is a schematic view of a connection structure of a center sill and a sideform.
Fig. 4 is a schematic diagram of a sideform configuration.
Fig. 5 is a schematic structural view of the top mold plate.
Fig. 6 is a schematic view of a connection structure of the intermediate beam and the bottom mold plate.
FIG. 7 is a schematic structural view of the invention closely attached to the inner hole of the box girder.
FIG. 8 is a schematic diagram of the top mold plate after being moved and retracted.
FIG. 9 is a schematic view of the bottom mold plate after being rotated and retracted.
FIG. 10 is a schematic diagram of the sideform after recovery from movement.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in the attached drawings 1 to 10, the whole drawing type small box girder hydraulic internal mold comprises a middle girder 1, side formworks 2, a bottom formwork 3 and a top formwork 4, wherein the side formworks 2 and the bottom formwork 3 are respectively and symmetrically arranged on two sides of the middle girder 1, and the top formwork 4 is arranged right above an upper girder 13 of the middle girder 1.
As shown in the attached drawings 1 to 2, the side formworks 2, the bottom formworks 3 and the top formworks 4 are movably arranged on the outer side of the middle beam 1, and after the side formworks 2, the bottom formworks 3 and the top formworks 4 completely move outwards and are unfolded, the side formworks 2, the bottom formworks 3 and the top formworks 4 are mutually connected to form a section of box beam inner mold in an isosceles trapezoid structure.
As shown in the attached figures 2 to 4, the side formworks 2 are slidably mounted at two sides of the middle beam 1, a plurality of side formwork oil cylinders 23 are connected on one side surface of the side formwork 2 close to the middle beam 1, the side formwork oil cylinders 23 are fixed on the upper cross beam 13, side formwork guide rods 21 are fixedly mounted on one side surface of the side formwork 2 close to the middle beam 1 through a connecting plate 22, the side formwork guide rods 21 are slidably mounted in side formwork guide rod sleeves 24 fixed on the middle beam 1, the side formwork oil cylinders 23 are used for pushing the side formworks 2 to move outwards to unfold and assemble with the bottom formwork 3 and the top formwork 4 to form an inner formwork for casting of the box beam, or the side formworks 2 are moved inwards to recover the side formworks 2, meanwhile, the side formwork guide rods 21 slide back and forth along the side formwork guide rod sleeves 24, and the guide function of the side formwork guide rods 21 can make the movement of the side formworks 2 more stable, thereby preventing the side formworks 2 from shifting due to the gravity, influence the shaping of the box girder pouring internal mold.
As shown in fig. 2, 5 and 6, the bottom surface of the top formwork 4 is connected with piston rods of a plurality of top formwork cylinders 42 fixed on the upper cross beam 13, the top formwork 4 is vertically and vertically installed right above the upper cross beam 13 through the top formwork cylinders 42, and the top formwork cylinders 42 are used for pushing the top formwork 4 to vertically move upwards to assemble the bottom formwork 3 and the side formworks 2 to form a pouring internal formwork of the box girder, or enabling the top formwork 4 to vertically move downwards to recover the top formwork 4.
As shown in fig. 2 and fig. 6, the bottom die plate 3 is rotatably installed on two sides of the middle beam 1, one side of the bottom die plate 3 is hinged to the lower beam 12 of the middle beam 1, the other side of the bottom die plate 3 is rotatably connected to the upper beam 13 of the middle beam 1 through the bottom die supporting mechanism 5, the bottom die supporting mechanism 5 comprises a bottom die supporting connecting rod 51, a coupling block 52 and a mounting plate 54, two ends of the bottom die supporting connecting rod 51 are respectively hinged to the bottom die plate 3 and the coupling block 52, the coupling block 52 is slidably arranged on the mounting plate 54, the mounting plate 54 is fixed between the lower beam 12 and the upper beam 13, the bottom die supporting mechanism 5 further comprises a bottom die oil cylinder 53 and a sliding groove 55, the top of the coupling block 52 is connected to a piston rod of a bottom die oil cylinder 53 fixed on the upper beam 13, the coupling block 52 is slidably arranged in the sliding groove 55 of the mounting plate 54 through the bottom die oil cylinder 53, and the bottom die oil cylinder 53 55 move up and down, so that the bottom template 3 rotates outwards under the action force of the bottom template support connecting rod 51 to unfold and assemble the top template 4 and the side templates 2 to form a pouring internal mold of the box girder, or the bottom template 3 rotates inwards to recycle the bottom template 3.
As shown in the attached drawings 2, 4 and 5, the joint surfaces of the side formworks 2, the bottom formworks 3 and the top formworks 4, which are mutually jointed, are all cut into 45-degree angles, so that sliding friction can be avoided when the side formworks 2, the bottom formworks 3 and the top formworks 4 are separated while the joint seams among the side formworks 2, the bottom formworks 3 and the top formworks 4 are ensured to be very small, cement slurry is prevented from leaking from the joint seams and is saved, thereby reducing the friction force between the bottom formworks 3 and the top formworks 4 and the side formworks 2 when the side formworks are recovered, facilitating quick recovery, limiting blocks 41 are respectively arranged on the tangent surfaces of the top formworks 4 and the two bottom formworks 3, which are at 45-degree angles, limiting grooves 43 matched with the limiting blocks 41 are correspondingly arranged on the tangent surfaces of the two side formworks 2, when the top formworks 4, the bottom formworks 3 and the side formworks 2 are completely unfolded and mutually jointed, the, the stability of being connected between top board 4, die block board 3 and the side form 2 is improved, reduces top board 4, die block board 3 and the risk that the displacement appears in the side form 2 is connected not hard up in the use, guarantees the overall dimension of case roof beam centre form simultaneously, reduces the adjustment time of case roof beam centre form, improves work efficiency.
As shown in fig. 3, a plurality of support rods 11 are connected between the lower cross beam 12 and the upper cross beam 13, and the support rods 11 are used for enhancing the strength and the bearing capacity of the lower cross beam 12 and the upper cross beam 13, so as to reduce the risk of stress and breakage of the lower cross beam 12 and the upper cross beam 13 in the using process.
As shown in fig. 1 and fig. 3, the length of a section of box girder inner mold which is in an isosceles trapezoid structure and formed by mutually connecting a side mold plate 2, a bottom mold plate 3 and a top mold plate 4 is 6m, the box girder mold plate is formed by mutually splicing a plurality of sections of box girder inner molds, the plurality of sections of box girder inner molds are connected through bolts so as to be conveniently adjusted according to the length of a box girder to be actually produced, supports 6 are respectively fixed on lower beams 12 of the two sections of box girder inner molds positioned at two ends of the box girder mold plate, the supports 6 are 4-shaped, the middle parts of the bulges of the two supports 6 respectively extend out of the end surfaces of the box girder mold plate to provide stress points for a jack to lift the box girder mold plate upwards, the inwards sunken parts of the supports 6 form accommodating spaces 61, the accommodating spaces 61 are used for accommodating the jack, and after the side mold plates 2, the bottom mold plate 3 and the top mold plate 4 of each section are moved and recovered, the cross-sectional dimension of case roof beam template is less than 8 sizes of case roof beam hole after the shaping, then put into accommodation space 61 to the jack, utilize the jack to make the case roof beam template upwards jacking certain distance, then push away the below of case roof beam template to the steel wheel board 71 of installing steel wheel 73, put the case roof beam template gently on steel wheel 73 again, the sliding friction who will overcome when can making the pull case roof beam template changes into rolling friction, be convenient for follow-up utilization hoist engine is followed the case roof beam template and is pulled out from case roof beam hole 8, and work efficiency is improved. And a plurality of side die oil cylinders 23 in each section of box girder inner die can be connected and conducted through a guide pipe, the guide pipe can be communicated with an external hydraulic station through a quick-change connector, the external hydraulic station can conveniently and synchronously control the plurality of side die oil cylinders 23, and similarly, a plurality of top die oil cylinders 42 and a plurality of bottom die oil cylinders 53 are respectively communicated with the external hydraulic station through a guide pipe to be controlled.
When the box girder casting is finished and the box girder template on the box girder inner hole 8 needs to be disassembled, a plurality of side mould oil cylinders 23, a top mould oil cylinder 42 and a bottom mould oil cylinder 53 are all communicated with an external hydraulic station through a quick change connector manually, then the top mould oil cylinder 42 of each section of box girder inner mould drives the top mould plate 4 to vertically move downwards and recover in place through the external hydraulic station, then the bottom mould oil cylinder 53 of each section of box girder inner mould drives a connecting shaft block 52 of a bottom mould supporting mechanism 5 and a bottom mould supporting connecting rod 51 to move upwards along a sliding groove 55, so that the bottom mould plate 3 rotates inwards under the action force of the bottom mould supporting connecting rod 51 and recovers in place, finally the side mould oil cylinders 23 of each section of box girder inner mould drive the side mould plates 2 to move inwards and recover in place, meanwhile, the side mould guide rods 21 on the side mould plates 2 slide along the side mould guide rod sleeves 24, and the guide action of the side mould guide rods, the method avoids the deviation of the moving direction of the side templates 2 due to the gravity action in the moving process to influence the forming of the box girder pouring inner mold, the operation is the box girder template recovery process, the full-hydraulic automatic box girder template recovery is realized, the box girder template unfolding process is opposite to the box girder template recovery process, when the side templates 2, the bottom templates 3 and the top templates 4 of all sections of box girder inner molds are completely moved and recovered, the cross-sectional dimension of the whole box girder template is smaller than the dimension of the formed box girder inner hole 8, then a jack is placed in the accommodating space 61, the box girder template is lifted upwards for a certain distance by the jack, then a plurality of steel wheel plates 71 provided with a plurality of steel wheels 73 are pushed to the lower part of the box girder template, and then the box girder template is lightly placed on the steel wheels 73, so that the sliding friction force to be overcome when the box girder template is pulled can be converted into rolling friction force, and the box girder template is conveniently pulled out of the box girder inner hole 8 by a winch subsequently, the steel wheel 73 is fixed on the steel wheel plate 71 through a bearing seat 72, and after each section of box girder inner mold is drawn out, the bolt at the joint of the box girder inner mold is screwed down to disassemble the section of box girder inner mold from the box girder template, thereby avoiding the case girder inner mold from being too long in stroke and needing a larger processing field, thereby saving the site cost, and workers do not need to enter the box girder inner hole 8 and the box girder inner mold when disassembling the pulled-out section of the box girder inner mold, finally, after the box girder template is completely drawn out, the steel wheel plate 71 is taken out of the box girder inner hole 8, the disassembly work of the box girder template can be completed, the structure is simple, the operation is convenient, the full-hydraulic automatic folding and supporting template can be realized, the manual operation of assembling and disassembling in the box girder inner hole 8 and the box girder inner die is not needed, the box girder template can be integrally drawn out from the section of the box girder inner hole 8 after being folded, the labor intensity of workers is reduced, the safety risk is reduced, and the construction time is greatly saved.
A mould retracting method of an integrally-drawn small box girder hydraulic internal mould is characterized by comprising the following steps:
firstly, when the box girder pouring is finished and a box girder template on a box girder inner hole 8 needs to be disassembled, a plurality of side mold oil cylinders 23, a plurality of top mold oil cylinders 42 and a plurality of bottom mold oil cylinders 53 are all communicated with an external hydraulic station manually through quick change connectors;
secondly, driving the top die plate 4 to vertically move downwards to be recovered in place by a top die oil cylinder 42 of each section of box girder internal die through an external hydraulic station, as shown in the attached figure 8;
thirdly, driving a connecting shaft block 52 and a bottom die supporting connecting rod 51 of the bottom die supporting mechanism 5 to move upwards along a sliding groove 55 by a bottom die oil cylinder 53 of each section of box girder inner die, so that the bottom die plate 3 rotates inwards under the acting force of the bottom die supporting connecting rod 51 and is recovered in place, as shown in fig. 9;
fourthly, finally, the side die oil cylinders 23 of the inner die of each section of the box girder drive the side die plates 2 to move inwards to be recovered in place, and meanwhile, the side die guide rods 21 on the side die plates 2 slide along the side die guide rod sleeves 24, as shown in the attached drawing 10, the side die guide rods 21 can guide the side die plates 2 to move more stably, so that the phenomenon that the moving direction of the side die plates 2 deviates due to the gravity action in the moving process to influence the forming of the box girder pouring inner die is avoided;
fifthly, after the side templates 2, the bottom templates 3 and the top templates 4 of the inner mold of each section of the box girder move and are recovered, the sectional dimension of the whole box girder template is smaller than the dimension of the formed box girder inner hole 8, the box girder template is 140mm away from the top surface of the box girder inner hole 8, then a jack is placed in the accommodating space 61, and the box girder template is lifted upwards by 120mm by the jack;
sixthly, pushing the steel wheel plate 71 provided with the steel wheel 73 to the lower part of the box girder template, and slightly placing the box girder template on the steel wheel 73 through a jack, so that the sliding friction force to be overcome when the box girder template is pulled and pulled can be converted into rolling friction force;
seventhly, pulling the box girder template out of the box girder inner hole 8 by using a winch, after every pulling out of a section of box girder inner die, unscrewing bolts at the joint of the box girder inner die to detach the section of box girder inner die from the box girder template, and avoiding the overlong stroke of the box girder inner die from needing a larger processing field, thereby saving the field cost, and the worker does not need to enter the box girder inner hole 8 and the box girder inner die when detaching the pulled section of box girder inner die
And eighthly, after the box girder templates are completely drawn out, the steel wheel plates 71 are taken out of the box girder inner holes 8, so that the box girder templates can be disassembled, the structure is simple, the operation is convenient, the full-hydraulic automatic folding and unfolding of the templates can be realized, the manual assembly and disassembly operation in the box girder inner holes 8 and the box girder inner molds is not needed, the box girder templates can be integrally drawn out of the cross sections of the box girder inner holes 8 after being folded, the labor intensity of workers is reduced, the safety risk is reduced, and the construction time is greatly saved.
The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the present invention.
Claims (8)
1. The utility model provides a little case roof beam hydraulic pressure centre form of whole pull formula which characterized in that: the side formworks and the bottom formworks are respectively and symmetrically arranged on two sides of the middle beam, and the top formwork is arranged right above an upper cross beam of the middle beam;
the side templates, the bottom template and the top template are movably arranged on the outer side of the middle beam, and after the side templates, the bottom template and the top template are completely moved outwards and unfolded, the side templates, the bottom template and the top template are mutually connected to form a section of box girder inner mold in an isosceles trapezoid structure;
the side templates are slidably arranged on two sides of the middle beam, a plurality of side template oil cylinders are connected to the surface of one side of each side template close to the middle beam, and the side template oil cylinders are fixed on the upper cross beam;
the bottom surface of the top template is connected with a plurality of top template oil cylinders fixed on the upper cross beam, and the top template is vertically arranged right above the upper cross beam through the top template oil cylinders;
the bottom die plate is rotatably arranged on two sides of the middle beam, one side of the bottom die plate is hinged with the lower cross beam of the middle beam, and the other side of the bottom die plate is rotatably connected with the upper cross beam of the middle beam through a bottom die supporting mechanism;
the bottom die supporting mechanism comprises a bottom die supporting connecting rod, a connecting shaft block and a mounting plate, wherein two ends of the bottom die supporting connecting rod are hinged to the bottom die plate and the connecting shaft block respectively, the connecting shaft block can be slidably arranged on the mounting plate, and the mounting plate is fixed between the lower cross beam and the upper cross beam.
2. The integral drawing type small box girder hydraulic internal mold as claimed in claim, wherein: the joint surfaces of the side template, the bottom template and the top template which are mutually connected are all cut into angles.
3. The integral drawing type small box girder hydraulic internal mold as claimed in claim, wherein: all be equipped with the stopper on the tangent plane that is 45 degrees angles on top die plate and two bottom forms, be corresponding on the tangent plane that is 45 degrees angles on two side forms be equipped with the spacing groove of stopper looks adaptation, when top die plate, bottom forms and side forms expand completely to link up each other after the spacing piece imbeds the spacing inslot respectively.
4. The integral drawing type small box girder hydraulic internal mold as claimed in claim, wherein: the bottom die supporting mechanism further comprises a bottom die oil cylinder and a sliding groove, the top of the connecting shaft block is connected with the bottom die oil cylinder fixed on the upper cross beam, and the connecting shaft block is arranged in the sliding groove in the mounting plate in a sliding mode through the bottom die oil cylinder.
5. The integral drawing type small box girder hydraulic internal mold as claimed in claim, wherein: and a side die guide rod is fixedly arranged on the surface of one side of the side die plate close to the middle beam through a connecting plate, and the side die guide rod is slidably arranged in a side die guide rod sleeve fixed on the middle beam.
6. The integral drawing type small box girder hydraulic internal mold as claimed in claim, wherein: and a plurality of support rods are connected between the lower cross beam and the upper cross beam.
7. The integral drawing type small box girder hydraulic internal mold as claimed in claim, wherein: the length that forms a lesson case roof beam centre form that is isosceles trapezoid structure by linking up each other between side form board, die block board and the die block is 6m, and case roof beam template then forms through a plurality of lesson case roof beam centre forms splice each other, and is located and is fixed with the support on the bottom end rail of two lesson case roof beam centre forms on the case roof beam template both ends respectively, the support is the style of calligraphy, and convex middle part does not outwards extend out case roof beam template terminal surface on two supports, and the inside sunken position of support forms the accommodation space, and the accommodation space is used for placing the jack.
8. A mould retracting method of an integrally-drawn small box girder hydraulic internal mould is characterized by comprising the following steps:
step one, when a box girder casting is finished and a box girder template on a box girder inner hole needs to be disassembled, a plurality of side mold oil cylinders, top mold oil cylinders and bottom mold oil cylinders are all communicated with an external hydraulic station manually through quick change connectors;
secondly, driving a top formwork oil cylinder of each section of box girder internal mold to drive a top formwork to vertically move downwards and recover in place through an external hydraulic station, as shown in the attached figure 8;
thirdly, enabling a bottom die oil cylinder of each section of box girder inner die to drive a connecting shaft block and a bottom die supporting connecting rod to move upwards, and enabling a bottom die plate to rotate inwards and recover in place, as shown in the attached drawing 9;
fourthly, finally, the side die oil cylinders of the inner die of each section of the box girder drive the side die plates to move inwards to be recovered in place, and meanwhile, the side die guide rods on the side die plates slide along the side die guide rod sleeves, as shown in the attached drawing 10;
fifthly, after the side templates, the bottom templates and the top templates of the inner mold of each section of the box girder are moved and recovered, the distance between the box girder templates and the top surface of the inner hole of the box girder is 140mm, then a jack is placed in the accommodating space, and the box girder templates are lifted upwards by 120mm by the jack;
sixthly, pushing the steel wheel plate provided with the steel wheels to the lower part of the box girder template, and slightly placing the box girder template on the steel wheels through a jack;
seventhly, drawing the box girder template out of the box girder inner hole by using a winch, and detaching a section of box girder inner mold from the box girder template after drawing a section of box girder inner mold;
and eighthly, taking the steel wheel plate out of the inner hole of the box girder to finish the disassembly work of the box girder template after the box girder template is completely drawn out.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010457367.1A CN111421656A (en) | 2020-05-26 | 2020-05-26 | Integrally-drawing type small box girder hydraulic internal mold and mold retracting method |
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| CN202010457367.1A CN111421656A (en) | 2020-05-26 | 2020-05-26 | Integrally-drawing type small box girder hydraulic internal mold and mold retracting method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112095481A (en) * | 2020-09-23 | 2020-12-18 | 吴马德 | A template structure for hanging basket construction concrete is continuous case bottom surface fillet |
| CN114833931A (en) * | 2022-06-07 | 2022-08-02 | 四川省交通建设集团股份有限公司 | Integrally-drawing type box girder internal mold and using method |
| CN115070908A (en) * | 2022-06-01 | 2022-09-20 | 中交第四公路工程局有限公司 | Method and device for fixing and disassembling prefabricated box girder integrally |
| CN115419259A (en) * | 2022-08-30 | 2022-12-02 | 中铁隧道局集团建设有限公司 | Hydraulic box girder die for box girder cast-in-place |
| CN118024385A (en) * | 2024-03-11 | 2024-05-14 | 中铁四局集团有限公司 | Quick-release prefabricated highway small box girder inner mold and demolding tool and demolding method |
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2020
- 2020-05-26 CN CN202010457367.1A patent/CN111421656A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112095481A (en) * | 2020-09-23 | 2020-12-18 | 吴马德 | A template structure for hanging basket construction concrete is continuous case bottom surface fillet |
| CN115070908A (en) * | 2022-06-01 | 2022-09-20 | 中交第四公路工程局有限公司 | Method and device for fixing and disassembling prefabricated box girder integrally |
| CN114833931A (en) * | 2022-06-07 | 2022-08-02 | 四川省交通建设集团股份有限公司 | Integrally-drawing type box girder internal mold and using method |
| CN114833931B (en) * | 2022-06-07 | 2022-11-11 | 四川省交通建设集团股份有限公司 | Integrally-drawing type box girder internal mold and using method |
| CN115419259A (en) * | 2022-08-30 | 2022-12-02 | 中铁隧道局集团建设有限公司 | Hydraulic box girder die for box girder cast-in-place |
| CN115419259B (en) * | 2022-08-30 | 2023-06-16 | 中铁隧道局集团建设有限公司 | Hydraulic box girder die for box girder cast-in-place |
| CN118024385A (en) * | 2024-03-11 | 2024-05-14 | 中铁四局集团有限公司 | Quick-release prefabricated highway small box girder inner mold and demolding tool and demolding method |
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