CN108098982B - Hydraulic retraction internal mold for large-span precast box girder - Google Patents
Hydraulic retraction internal mold for large-span precast box girder Download PDFInfo
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- CN108098982B CN108098982B CN201810044691.3A CN201810044691A CN108098982B CN 108098982 B CN108098982 B CN 108098982B CN 201810044691 A CN201810044691 A CN 201810044691A CN 108098982 B CN108098982 B CN 108098982B
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- 230000007704 transition Effects 0.000 claims description 63
- 238000005192 partition Methods 0.000 claims description 34
- 239000010720 hydraulic oil Substances 0.000 claims description 24
- 239000003921 oil Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000004567 concrete Substances 0.000 abstract description 18
- 238000000034 method Methods 0.000 abstract description 18
- 230000008569 process Effects 0.000 abstract description 18
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000009417 prefabrication Methods 0.000 description 6
- 230000002035 prolonged effect Effects 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000003028 elevating effect Effects 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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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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- Engineering & Computer Science (AREA)
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- Ceramic Engineering (AREA)
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Abstract
The invention provides a hydraulic retraction internal mold of a large-span precast box girder, which comprises a top mold and a plurality of lifting supporting devices arranged below the top mold; the two sides of the top die are respectively pivoted with side dies, the two side dies and the top die are enclosed to form a hollow structure with an open bottom, a first hydraulic cylinder is connected between the top die and the side dies and can drive the side dies to rotate towards or away from the top die, the lifting support device comprises a walking beam, a bearing beam and a lifting hydraulic cylinder connected between the walking beam and the bearing beam, the bearing beam is fixedly connected to the bottom surface of the top die, the walking beam is located below the bearing beam, and the lifting hydraulic cylinder can drive the bearing beam to move towards or away from the walking beam. The hydraulic retraction internal mold for the large-span precast box girder effectively strengthens the rigidity in the length direction, so that the top mold is not easy to deform in the large-span concrete pouring process.
Description
Technical Field
The invention relates to the technical field of box girder production and manufacturing, in particular to a hydraulic retraction internal mold for a large-span prefabricated box girder.
Background
On a passenger special line of a high-speed railway, in view of the high standard requirement of high-speed driving on the smoothness of the line, most road sections are spanned by adopting a bridge structural form, so that the whole-hole hollow prestressed box girder is widely applied. The hydraulic retraction internal mold for the precast box girder solves the problem that the precast box girder has an internal cavity in the concrete pouring process. However, because the rigidity in the length direction is limited, the hydraulic retraction internal mold of the prefabricated box girder used in the prior art is usually 32 meters or 24 meters, so that the top mold is ensured not to deform in the concrete pouring process, and the hydraulic retraction internal mold cannot be applied to manufacturing the large-span prefabricated box girder of a high-speed railway passenger special line.
Disclosure of Invention
The invention aims to provide a hydraulic retractable internal mold for a large-span prefabricated box girder, which can strengthen rigidity in the length direction.
In order to achieve the above purpose, the invention provides a hydraulic retractable internal mold for a large-span precast box girder, which comprises the following components: the top die is characterized in that two sides of the top die are respectively pivoted with side dies, the two side dies and the top die are enclosed to form a hollow structure with an open bottom, a first hydraulic cylinder is connected between the top die and the side dies, and the first hydraulic cylinder can drive the side dies to rotate towards or away from the top die; the lifting support device comprises a walking beam, a bearing beam and a lifting hydraulic cylinder connected between the walking beam and the bearing beam, wherein the walking Liang Weiyu is arranged below the bearing beam, the bearing beam is fixedly connected to the bottom surface of the top die, and the lifting hydraulic cylinder can drive the bearing beam to move towards or away from the walking beam.
The large-span prefabricated box girder hydraulic retraction internal mold is characterized in that telescopic guide rods are respectively arranged on two sides of the lifting hydraulic oil cylinder, one end of each telescopic guide rod is fixedly connected with the walking beam, and the other end of each telescopic guide rod is fixedly connected with the spandrel girder.
The hydraulic retractable inner mold for the large-span prefabricated box girder comprises a standard section top mold, a transition section top mold and a partition wall section top mold, wherein the partition wall section top mold is connected with the standard section top mold through the transition section top mold.
The hydraulic retractable internal mold for the large-span prefabricated box girder comprises the standard section side molds connected to the two sides of the standard section top mold, the transition section side molds connected to the two sides of the transition section top mold, the partition wall section side molds connected to the two sides of the partition wall section top mold, and gaps are reserved between the standard section side molds and the transition section side molds and between the transition section side molds and the partition wall section side molds.
The large-span prefabricated box girder hydraulic retraction internal mold has the gap of 65-85 mm.
The large-span prefabricated box girder hydraulic retraction internal mold comprises a standard section side mold, wherein the standard section side mold is pivoted with a standard section angle mold, a second hydraulic cylinder is connected between the standard section side mold and the standard section angle mold, and the second hydraulic cylinder can drive the standard section angle mold to rotate towards or away from the standard section side mold; the transition section side die is pivoted with a transition section angle die, a third hydraulic oil cylinder is connected between the transition section side die and the transition section angle die, and the third hydraulic oil cylinder can drive the transition section angle die to rotate towards or away from the transition section side die.
The hydraulic retraction internal mold for the large-span prefabricated box girder comprises the standard section end face flanges arranged at two ends of the standard section top mold, the transition section end face flanges arranged at two ends of the transition section top mold, the partition wall section end face flange arranged at least one end of the partition wall section top mold, the standard section top mold and the transition section top mold are connected through the standard section end face flange and the transition section end face flange, the transition section top mold and the partition wall section top mold are connected through the transition section end face flange and the partition wall section end face flange, and the partition wall section top mold is connected.
The large-span prefabricated box girder hydraulic retraction internal mold comprises the control device, and the control device is respectively connected with the first hydraulic oil cylinder and the lifting hydraulic oil cylinder through oil pipes.
The hydraulic retraction internal mold for the large-span prefabricated box girder comprises the lifting supporting device, wherein the conveying device for conveying the lifting supporting device is arranged below the lifting supporting device, the conveying device comprises a support, the upper end face of the support is connected with a plurality of rotatable rollers, the walking Liang Neng is arranged on the rollers, and the walking girder is driven to reciprocate along the support through the rotation of the rollers.
The large-span prefabricated box girder hydraulic retraction internal mold is characterized in that the support is provided with a pull rod which can be connected with the walking girder.
Compared with the prior art, the invention has the following advantages:
according to the hydraulic retraction internal mold for the large-span precast box girder, the bottom surface of the top mold is connected with the bearing beam, and the walking beam is connected below the bearing beam, so that the rigidity in the length direction of the hydraulic retraction internal mold for the large-span precast box girder is effectively enhanced, the integral lifting rigidity of the hydraulic retraction internal mold for the large-span precast box girder is ensured, the top mold is not deformed in the large-span concrete pouring process, and the hydraulic retraction internal mold for the large-span precast box girder can be prolonged to 40 meters and can be applied to manufacturing the large-span precast box girder of a special passenger line of a high-speed railway;
according to the hydraulic retraction internal mold for the large-span precast box girder, the actions of the first hydraulic oil cylinder, the lifting hydraulic oil cylinder, the second hydraulic oil cylinder and the third hydraulic oil cylinder are controlled by the control device, so that the operation of the hydraulic retraction internal mold for the large-span precast box girder is simplified, the retraction process of the hydraulic retraction internal mold for the large-span precast box girder is easier to control, the operability and intuitiveness are improved, and the possibility is created for the design scheme of realizing the integral use of the hydraulic retraction internal mold for the large-span precast box girder;
according to the hydraulic retraction internal mold for the large-span precast box girder, provided by the invention, the telescopic guide rods are arranged on the two sides of the lifting hydraulic cylinder, so that the whole supporting area of a fulcrum is increased, and the stability of concrete pouring is further improved;
according to the hydraulic retraction internal mold for the large-span precast box girder, the pull rod is arranged on the support, and the walking girder and the support are fixedly pulled by the pull rod in the process of waiting for concrete solidification, so that the stability of the hydraulic retraction internal mold for the large-span precast box girder in the use process is ensured.
Drawings
The following drawings are only for purposes of illustration and explanation of the present invention and are not intended to limit the scope of the invention. Wherein:
FIG. 1 is a schematic structural view of a hydraulic retractable inner mold of a large-span precast box girder of the present invention;
FIG. 2 is a schematic view of the A-A structure of FIG. 1;
FIG. 3 is a schematic view of the B-B direction structure of FIG. 1;
FIG. 4 is a schematic side view of the hydraulic retractable inner mold of the large-span precast box girder of the present invention.
Reference numerals illustrate:
1. a top mold; 11. a standard section top mold; 12. a transition section top mold; 13. a partition wall section top mold; 2. a side mold; 21. standard section side mold; 211. standard segment angle mould; 22. a transition section side mold; 222. a transition section angle mold; 23. side forms of the partition wall sections; 3. a first hydraulic cylinder; 4. lifting supporting device; 41. a walking beam; 42. a spandrel girder; 43. lifting hydraulic oil cylinder; 44. a telescopic guide rod; 5. a control device; 6. a second hydraulic cylinder; 7. a third hydraulic cylinder; 8. a conveying device; 81. a bracket; 811. a pull rod; 82. a roller; 83. a support leg; 9. a bottom die; 10. a standard section; 20. a transition section; 30. a partition wall section.
Detailed Description
For a clearer understanding of the technical solutions, objects and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings.
As shown in fig. 1, 2 and 3, the present invention provides a hydraulic retraction internal mold of a large-span prefabricated box girder, in particular, a hydraulic retraction internal mold of a large-span prefabricated box girder for manufacturing a high-speed railway passenger dedicated line with a speed of 350km per hour, which comprises a top mold 1 and a plurality of lifting support devices 4 arranged below the top mold 1; wherein, the two sides of the top mold 1 are respectively pivoted with the side molds 2, in particular, the upper ends of the two side molds 2 are rotatably connected with the two sides of the top mold 1, so that the two side molds 2 and the top mold 1 are enclosed into a hollow structure with an open bottom, a first hydraulic cylinder 3 is connected between the top mold 1 and the side molds 2, namely, one first hydraulic cylinder 3 is connected between each side mold 2 and the top mold 1, the first hydraulic cylinder 3 can drive the side molds 2 to rotate towards or away from the top mold 1, namely, the side molds 2 are driven to rotate by the first hydraulic cylinder 3, the relative positions of the side molds 2 and the top mold 1 are changed, so as to change the size of the hollow structure enclosed by the two side molds 2 and the top mold 1, thereby the expansion and demolding operation of the large-span precast box girder hydraulic retraction internal mold are simple and convenient, a plurality of lifting supporting devices 4 are arranged in the hollow structure, preferably, a plurality of lifting supporting devices 4 are arranged in a row, each lifting supporting device 4 comprises a walking beam 41, a spandrel girder 42 and a lifting hydraulic cylinder 43 connected between the walking beam 41 and the spandrel girder 42, wherein the walking beam 41 is positioned below the spandrel girder 42, the spandrel girder 42 is fixedly connected to the bottom surface of the top mould 1, the longitudinal rigidity of the top mould 1 is increased through the spandrel girder 42, so that the longitudinal rigidity of a large-span precast box girder hydraulic retraction internal mould is increased, the walking beam 41 connected with the spandrel girder 42 into a whole through the lifting hydraulic cylinder 43, the longitudinal rigidity of the large-span precast box girder hydraulic retraction internal mould is further increased, the large-span precast box girder hydraulic retraction internal mould can be prolonged to 40 meters, and can be applied to the manufacture of the large-span precast box girder of a high-speed railway passenger special line, the lifting hydraulic cylinder 43 can drive the spandrel girder 42 to move towards or away from the walking beam 41, namely, the elevating hydraulic cylinder 43 drives the spandrel girder 42 to move up and down to change the position of the top mold 1, so that the elevating operation of the top mold 1 becomes simple and convenient.
Further, the spandrel girder 42 and the walking beam 41 are steel box girders, the spandrel girder 42 is welded with the top mould 1, the welding mode is firm and reliable, the reliability of connection between the spandrel girder 42 and the top mould 1 is effectively ensured, and the side mould 2 is connected with the top mould 1 through a hinge.
Further, the hydraulic retraction internal mold of the large-span precast box girder further comprises a control device 5, the control device 5 is respectively connected with the first hydraulic cylinder 3 and the lifting hydraulic cylinder 43 through oil pipes, and the control device 5 is used for controlling the actions of the first hydraulic cylinder 3 and the lifting hydraulic cylinder 43, so that the first hydraulic cylinder 3 and the lifting hydraulic cylinder 43 can synchronously act, the operation of the hydraulic retraction internal mold of the large-span precast box girder is simplified, and the retraction process of the hydraulic retraction internal mold of the large-span precast box girder is easier to control.
Of course, the spandrel girder 42 may also be connected to the top mold 1 by bolts, and the side mold 2 may also be connected to the top mold 1 by pins, which will not be described herein, but any existing structure or simple replacement thereof, which can achieve the connection of the spandrel girder 42 to the top mold 1 and the pivoting of the side mold 2 to the top mold 1, should be within the scope of the present invention.
When the large-span prefabricated box girder hydraulic retraction internal mold is required to be used, the control device 5 controls the lifting hydraulic oil cylinder 43 to act so that the spandrel girder 42 is lifted to the design required height, the jacking girder 42 is used for jacking the top mold 1, meanwhile, the first hydraulic oil cylinder 3 is controlled to act so as to expand the side molds 2 arranged on two sides of the top mold 1, when the side molds 2 are expanded to the degree required by the design, the control device 5 can enable the first hydraulic oil cylinder 3 and the lifting hydraulic oil cylinder 43 to keep the state, and then the reinforced concrete box girder can be manufactured according to the actual manufacturing requirement;
when the prefabrication of the box girder is completed, after the concrete strength reaches the demoulding strength, the control device 5 controls the first hydraulic oil cylinder 3 to act to shrink the side mould 2 of the hydraulic retraction internal mould of the large-span prefabrication box girder, and then controls the lifting hydraulic oil cylinder 43 to act to lower the spandrel girder 42 to a proper position, namely, after the hydraulic retraction internal mould of the large-span prefabrication box girder is shrunk, the whole hydraulic retraction internal mould of the large-span prefabrication box girder can be pulled out.
It should be noted that, the control device 5 is a hydraulic operating system, and a specific manner of controlling the lifting hydraulic cylinder 43 and the first hydraulic pressure is a prior art, which is not described herein.
According to the hydraulic retraction internal mold for the large-span precast box girder, provided by the invention, the bottom surface of the top mold 1 is connected with the bearing beam 42, and the traveling beam 41 is connected below the bearing beam 42, so that the rigidity in the length direction of the hydraulic retraction internal mold for the large-span precast box girder is effectively enhanced, the integral lifting rigidity of the hydraulic retraction internal mold for the large-span precast box girder is ensured, the top mold 1 is not deformed in the large-span concrete pouring process, and therefore, the hydraulic retraction internal mold for the large-span precast box girder can be prolonged to 40 meters, and can be applied to manufacturing the large-span precast box girder of a passenger special line of a high-speed railway; the actions of the first hydraulic cylinder 3 and the lifting hydraulic cylinder 43 are controlled by the control device 5, so that the operation of the large-span precast box girder hydraulic retraction internal mold is simplified, the retraction process of the large-span precast box girder hydraulic retraction internal mold is easier to control, the operability and the intuitiveness are improved, and the possibility is created for the design scheme of realizing the integral use of the large-span precast box girder hydraulic retraction internal mold.
Further, as shown in fig. 2 and 3, considering that the lifting hydraulic cylinder 43 needs to bear the pressure of the top mold 1, the side mold 2 and the poured concrete during pouring, shaking is easy to occur, in order to enhance the stability of the lifting hydraulic cylinder 43, two sides of the lifting hydraulic cylinder 43 are respectively provided with a telescopic guide rod 44, one end of the telescopic guide rod 44 is fixedly connected with the walking beam 41, the other end of the telescopic guide rod 44 is fixedly connected with the spandrel girder 42, the telescopic guide rod 44 can stretch and retract along with the up-and-down movement of the spandrel girder 42, the whole supporting area of a supporting point is increased through the telescopic guide rod 44, and the stability of the top mold 1 during pouring concrete is remarkably improved.
In one embodiment of the present invention, as shown in fig. 4, the top mold 1 includes a standard section top mold 11, a transition section top mold 12, and a partition wall section top mold 13, and the partition wall section top mold 13 is connected to the standard section top mold 11 through the transition section top mold 12, i.e., the entire large-span prefabricated box girder hydraulic retractable inner mold is divided into three parts of a standard section 10, a transition section 20, and a partition wall section 30, and the length of the standard section 10 can be adjusted according to actual use requirements to form the large-span prefabricated box girder hydraulic retractable inner mold for pouring prefabricated box girders of different lengths of 24 meters, 32 meters, 32.6 meters, 40 meters, 40.6 meters, etc.
Further, the side molds 2 connected to both sides of the standard section top mold 11 are standard section side molds 21, the side molds 2 connected to both sides of the transition section top mold 12 are transition section side molds 22, and the side molds 2 connected to both sides of the partition section top mold 13 are partition section side molds 23, and in order to avoid mutual interference between the side molds 2 of different parts, gaps (not shown in the drawings) are provided between the standard section side molds 21 and the transition section side molds 22, and between the transition section side molds 22 and the partition section side molds 23, preferably, the gaps are 65mm to 85mm, so that the side molds 2 of different parts will not interfere with each other, and the casting production of the box girder will not be affected.
Still further, as shown in fig. 2, 3 and 4, the standard section side mold 21 is pivoted with a standard section angle mold 211, and a second hydraulic cylinder 6 is connected between the standard section side mold 21 and the standard section angle mold 211, the second hydraulic cylinder 6 is connected with the control device 5 through an oil pipe, and the second hydraulic cylinder 6 can drive the standard section angle mold 211 to rotate towards or away from the standard section side mold 21; the transition section side die 22 is pivoted with a transition section angle die 222, a third hydraulic cylinder 7 is connected between the transition section side die 22 and the transition section angle die 222, the third hydraulic cylinder 7 is connected with the control device 5 through an oil pipe, the third hydraulic cylinder 7 can drive the transition section angle die 222 to rotate towards or away from the transition section side die 22, that is, the control device 5 can simultaneously control the actions of the first hydraulic cylinder 3, the lifting hydraulic cylinder 43, the second hydraulic cylinder 6 and the third hydraulic cylinder 7, so that the operation of collecting and releasing the inner die of the large-span precast box girder hydraulic collecting and releasing die is simplified, and the process of collecting and releasing the inner die of the large-span precast box girder hydraulic collecting and releasing die is easier to control.
Further, standard section end face flanges (not shown in the figure) are respectively arranged at two ends of the standard section top die 11, transition section end face flanges (not shown in the figure) are respectively arranged at two ends of the transition section top die 12, at least one end of the partition wall section top die 13 is provided with a partition wall section end face flange (not shown in the figure), the standard section top die 11 is connected with the transition section top die 12 through the standard section end face flange and the transition section end face flange, the transition section top die 12 is connected with the partition wall section top die 13 through the transition section end face flange, and the connection mode is simple and convenient, so that the assembly of the large-span prefabricated box girder hydraulic retraction internal die is simple and convenient.
In one embodiment of the present invention, as shown in fig. 2 and 3, a conveying device 8 for conveying the lifting support device 4 is arranged below the lifting support device 4, the conveying device 8 includes a bracket 81, the bracket 81 is located below the top mold 1, a plurality of rotatable rollers 82 are connected to an upper end surface of the bracket 81, preferably, the plurality of rollers 82 are arranged in two rows which are parallel and spaced along an extending direction of the bracket 81, the walking beam 41 is located on the rollers 82, and the walking beam 41 is driven to reciprocate along the bracket 81 by rotating the rollers 82, so that a demolding operation of the whole large-span prefabricated box beam hydraulic retraction inner mold is simple and convenient, a supporting leg 83 is connected to a lower end surface of the bracket 81, and the supporting leg 83 is connected to the bottom mold 9.
Further, in order to prevent the traveling beam 41 from moving relative to the bracket 81 during the solidification of concrete, a tie rod 811 capable of being connected with the traveling beam 41 is provided on the bracket 81, and the traveling beam 41 and the bracket 81 are fastened by the tie rod 811, thereby ensuring the stability of the large-span precast box beam during the use of the hydraulic retractable inner mold.
The use process of the hydraulic retraction internal mold of the large-span precast box girder provided by the invention is specifically described below with reference to the accompanying drawings:
as shown in fig. 1, 2 and 3, when the large-span prefabricated box girder hydraulic retraction internal mold is required, firstly, mounting a supporting leg 83 on a bottom mold 9, mounting a bracket 81 on the supporting leg 83, mounting a roller 82 on the bracket 81, pushing a lifting support device 4 connected with a top mold 1 to a pouring position through the roller 82, then controlling a lifting hydraulic cylinder 43 to act through a control device 5 to lift a bearing girder 42 to a design required height, namely lifting the top mold 1 to the design position, simultaneously controlling a first hydraulic cylinder 3 to act to expand a standard section side mold 21, a transition section side mold 22 and a partition wall section side mold 23, and when the standard section side mold 21, the transition section side mold 22 and the partition wall section side mold 23 are expanded to the degree required by the design, keeping the first hydraulic cylinder 3 and the lifting hydraulic cylinder 43 in the state through the control device 5, so that the reinforced concrete box girder can be manufactured;
when the prefabrication of the box girder is completed, after the concrete strength reaches the demoulding strength, the first hydraulic cylinder 3 is controlled by the control device 5 to act to shrink the standard section side mould 21, the transition section side mould 22 and the partition wall section side mould 23, then the spandrel girder 42 is lowered to a proper position, and then the walking girder 41 is moved outwards through the idler wheels 82 until the hydraulic retraction internal mould of the whole large-span prefabrication box girder is pulled out of the concrete box girder.
It should be noted that, according to the design requirement, the third hydraulic cylinder 7 and the fourth hydraulic cylinder are driven by the control device 5 to act, so that the positions of the standard section angle mould 211 and the transition section angle mould 222 can be adjusted, and in the casting process, the whole supporting area of the supporting point is increased by the telescopic guide rod 44, so that the stability of the concrete in casting is improved; in the process of waiting for concrete solidification, the walking beam 41 and the bracket 81 are fixedly pulled through the pull rod 811 so as to ensure the stability of the large-span precast box beam in the use process of the hydraulic retraction internal mold.
In summary, the hydraulic retraction internal mold for the large-span precast box girder provided by the invention has the advantages that the bottom surface of the top mold is connected with the spandrel girder, and the traveling beam is connected below the spandrel girder, so that the rigidity in the length direction of the hydraulic retraction internal mold for the large-span precast box girder is effectively enhanced, the integral hoisting rigidity of the hydraulic retraction internal mold for the large-span precast box girder is ensured, the top mold is not deformed in the large-span concrete pouring process, the hydraulic retraction internal mold for the large-span precast box girder can be prolonged to 40 meters, and the hydraulic retraction internal mold for the large-span precast box girder can be applied to the manufacture of large-span precast box girders of passenger special lines of high-speed railways;
according to the hydraulic retraction internal mold for the large-span precast box girder, the actions of the first hydraulic oil cylinder, the lifting hydraulic oil cylinder, the second hydraulic oil cylinder and the third hydraulic oil cylinder are controlled by the control device, so that the operation of the hydraulic retraction internal mold for the large-span precast box girder is simplified, the retraction process of the hydraulic retraction internal mold for the large-span precast box girder is easier to control, the operability and intuitiveness are improved, and the possibility is created for the design scheme of realizing the integral use of the hydraulic retraction internal mold for the large-span precast box girder;
according to the hydraulic retraction internal mold for the large-span precast box girder, provided by the invention, the telescopic guide rods are arranged on the two sides of the lifting hydraulic cylinder, so that the whole supporting area of a fulcrum is increased, and the stability of concrete pouring is further improved;
according to the hydraulic retraction internal mold for the large-span precast box girder, the pull rod is arranged on the support, and the walking girder and the support are fixedly pulled by the pull rod in the process of waiting for concrete solidification, so that the stability of the hydraulic retraction internal mold for the large-span precast box girder in the use process is ensured.
The foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention. Any equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this invention, and are intended to be within the scope of this invention. It should be noted that, the components of the present invention are not limited to the above-mentioned overall application, and each technical feature described in the specification of the present invention may be selected to be used singly or in combination according to actual needs, so that other combinations and specific applications related to the present invention are naturally covered by the present invention.
Claims (9)
1. The utility model provides a prefabricated case roof beam hydraulic pressure of large-span receive and releases centre form, its characterized in that, prefabricated case roof beam hydraulic pressure of large-span receive and releases centre form includes:
the top die is characterized in that two sides of the top die are respectively pivoted with side dies, the two side dies and the top die are enclosed to form a hollow structure with an open bottom, a first hydraulic cylinder is connected between the top die and the side dies, and the first hydraulic cylinder can drive the side dies to rotate towards or away from the top die;
the lifting support devices comprise walking beams, bearing beams and lifting hydraulic cylinders connected between the walking beams and the bearing beams, wherein the walking beams Liang Weiyu are arranged below the bearing beams, the bearing beams are fixedly connected to the bottom surface of the top die, and the lifting hydraulic cylinders can drive the bearing beams to move towards or away from the walking beams;
the spandrel girder extends along the length direction of the large-span precast box girder hydraulic retraction internal mold, so that the rigidity of the large-span precast box girder in the length direction of the hydraulic retraction internal mold is increased; the spandrel girder and the walking beam are steel box girders; the lifting hydraulic cylinder is characterized in that telescopic guide rods are respectively arranged on two sides of the lifting hydraulic cylinder, one end of each telescopic guide rod is fixedly connected with the top surface of the walking beam, and the other end of each telescopic guide rod is fixedly connected with one side surface of the bearing beam.
2. The hydraulic retractable inner die of the large-span precast box girder according to claim 1, wherein,
the top mould comprises a standard section top mould, a transition section top mould and a partition wall section top mould, and the partition wall section top mould is connected with the standard section top mould through the transition section top mould.
3. The hydraulic retractable inner die of the large-span precast box girder according to claim 2, wherein,
the side dies connected to two sides of the standard section top die are standard section side dies, the side dies connected to two sides of the transition section top die are transition section side dies, the side dies connected to two sides of the partition wall section top die are partition wall section side dies, and gaps are reserved between the standard section side dies and the transition section side dies and between the transition section side dies and the partition wall section side dies.
4. The hydraulic retractable inner die for the large-span precast box girder according to claim 3, wherein,
the gap is 65 mm-85 mm.
5. The hydraulic retractable inner die for the large-span precast box girder according to claim 3, wherein,
the standard section side die is pivoted with a standard section angle die, a second hydraulic oil cylinder is connected between the standard section side die and the standard section angle die, and the second hydraulic oil cylinder can drive the standard section angle die to rotate towards or away from the standard section side die;
the transition section side die is pivoted with a transition section angle die, a third hydraulic oil cylinder is connected between the transition section side die and the transition section angle die, and the third hydraulic oil cylinder can drive the transition section angle die to rotate towards or away from the transition section side die.
6. The hydraulic retractable inner die of the large-span precast box girder according to claim 2, wherein,
standard section end face flanges are respectively arranged at two ends of the standard section top die, transition section end face flanges are respectively arranged at two ends of the transition section top die, a partition wall section end face flange is arranged at least one end of the partition wall section top die, the standard section top die is connected with the transition section end face flange through the standard section end face flange, the standard section top die is connected with the transition section top die, the partition wall section end face flange is connected through the transition section end face flange, and the transition section top die is connected with the partition wall section top die.
7. The hydraulic retractable inner die of the large-span precast box girder according to claim 1, wherein,
the hydraulic retraction internal mold of the large-span precast box girder further comprises a control device, and the control device is respectively connected with the first hydraulic cylinder and the lifting hydraulic cylinder through oil pipes.
8. The hydraulic retractable inner die for a large-span precast box girder according to any one of claims 1 to 7, wherein,
the lifting support device comprises a support, wherein a plurality of rotatable rollers are connected to the upper end face of the support, the walking Liang Neng is arranged on the rollers, and the walking beam can be driven to reciprocate along the support through rotation of the rollers.
9. The hydraulic retractable inner die of the large-span precast box girder according to claim 8, wherein,
the support is provided with a pull rod which can be connected with the walking beam.
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| CN109629437A (en) * | 2019-01-11 | 2019-04-16 | 中国铁建大桥工程局集团有限公司 | A kind of mobile whole hole in-situ depositing equipment of box beam and its application method |
| CN110126082A (en) * | 2019-02-26 | 2019-08-16 | 北京市政路桥股份有限公司 | A kind of concrete box girder internal model stripper apparatus and release method |
| CN111958781A (en) * | 2020-08-18 | 2020-11-20 | 郑州大学 | Auxiliary forming device for prefabricated section beam |
| CN114102841A (en) * | 2021-12-13 | 2022-03-01 | 上海申邦市政钢结构厂 | Automatic mold opening and closing control system and control method for box girder mold core |
| CN115723226A (en) * | 2022-12-09 | 2023-03-03 | 江苏月生达机械制造有限公司 | Multi-section adjustable structure of internal mold of prefabricated hydraulic box girder |
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