CN215660904U

CN215660904U - Segment box girder internal mold top plate structure

Info

Publication number: CN215660904U
Application number: CN202121578497.7U
Authority: CN
Inventors: 董献楠; 曹淑亮; 李毅
Original assignee: Shandong Boyuan Heavy Industry Co ltd
Current assignee: Shandong Boyuan Heavy Industry Co ltd
Priority date: 2021-07-13
Filing date: 2021-07-13
Publication date: 2022-01-28
Anticipated expiration: 2031-07-13

Abstract

The utility model discloses a top plate structure of an internal mold of a segmental box girder, which comprises a mold closing state, a mold releasing state and a box girder. When the demolding state is presented, the hydraulic oil cylinder connected with the inner mold top plate is contracted to enable the inner mold top plate to rotate around the pin shaft to descend, then the telescopic oil cylinder is controlled to contract the inner mold upper corner and the inner mold lower corner through the telescopic oil cylinder until the inner mold top plate, the inner mold upper corner and the inner mold lower corner leave the inner wall of the box girder, and the template solves the problems of limited inner cavity space and limited inner mold contraction amount, and realizes the contraction of the template to the maximum extent.

Description

Segment box girder internal mold top plate structure

Technical Field

The utility model relates to a top plate structure of an internal mold of a segmental box girder, in particular to the technical field of bridge construction industry.

Background

The hanging basket construction is also called a construction hanging basket, is a main device for the segmental construction of a prestressed concrete continuous beam, a T-shaped steel structure and a suspension beam, and can be integrally forward along a track. Segment prefabrication methods of segment splicing technology include two types: long wire method and short wire method. The short-line method is a construction process for dividing a continuous beam into a plurality of short sections according to an I configuration formula, converting integral coordinates of a finished bridge into local coordinates of a prefabricating factory by considering factors such as concrete shrinkage, creep and pre-camber, adjusting the plane position and elevation of produced adjacent beam sections by taking a fixed end mold in a prefabricating pedestal as a reference, and gradually matching in a fixed template system of the prefabricating pedestal to perform the box beam sections in a flowing water manner.

At present, in the construction process of prefabricating a segmental box girder by a short line method, an inner die template is generally designed into an inner die top plate, an inner die upper corner and an inner die lower corner 3 part, and the design idea of demoulding generally comprises the steps of vertically descending the top plate, horizontally contracting the upper corner template towards the inside and rolling the lower corner template. However, the method has the disadvantages that the horizontal shrinkage of the upper corner template is insufficient, the upper corner template cannot be shrunk in place when upper and lower tooth blocks exist and the space of an inner cavity is limited, and the template cannot avoid the tooth blocks when being drawn out of the inner cavity of the beam body, so that the beam body is easily damaged.

Regarding to the construction process of prefabricating the segmental box girder by the short line method at present, an inner die template is generally designed into an inner die top plate, an inner die upper corner and an inner die lower corner 3 part, and the design idea of demoulding is generally that the top plate is vertically lowered, then the upper corner template is horizontally contracted towards the inside, and the lower corner template is rolled. However, the method has the disadvantages that the horizontal shrinkage of the upper corner template is insufficient, the template cannot be shrunk in place when upper and lower tooth blocks exist and the space of an inner cavity is limited, and the template cannot avoid the tooth blocks when being drawn out of the inner cavity of the beam body, so that the beam body is easily damaged. In chinese patent publication no: CN 105365036A discloses an installation process of a section box girder manufacturing template, the whole installation process measurement of the technical scheme is easy to control, the installation speed is high, the construction period is shortened, the error in the section box girder manufacturing process is greatly reduced, the yield of the whole section box girder manufacturing is improved, and the quality of the manufactured section box girder is improved; however, in the construction process of prefabricating the segmental box girder by the short-line method, the inner die template is generally designed into an inner die top plate, an inner die upper corner and an inner die lower corner 3, and the design idea of demoulding is to firstly vertically lower the top plate, then horizontally shrink the upper corner template towards the inside and roll up the lower corner template. However, the method has the disadvantages that the horizontal shrinkage of the upper corner template is insufficient, the upper corner template cannot be shrunk in place under the conditions of upper and lower tooth blocks and limited inner cavity space, and the problem that the beam body is easily damaged because the tooth blocks cannot be avoided when the template is drawn out of the inner cavity of the beam body still cannot be solved.

Disclosure of Invention

In order to overcome the above-mentioned defects in the prior art, embodiments of the present invention provide a top plate structure of an internal mold of a segmental box girder, so as to solve the above-mentioned problems in the background art, in the construction process of prefabricating the segmental box girder by a short-line method, the internal mold templates are usually designed as the internal mold top plate, the internal mold upper corner and the internal mold lower corner 3, and the design concept of demolding is generally to first vertically lower the top plate, then horizontally shrink the upper corner template towards the inside and roll the lower corner template. However, the method has the disadvantages that the horizontal shrinkage of the upper corner template is insufficient, the template cannot be shrunk in place when upper and lower tooth blocks exist and the space of an inner cavity is limited, the template cannot avoid the tooth blocks when being drawn out of the inner cavity of the beam body, and the beam body is easily damaged.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a festival section case roof beam centre form roof structure, includes compound die state, drawing of patterns state and case roof beam, the case roof beam is provided with case roof beam cover half, case roof beam web and case roof beam die block to whole be trapezoidal setting, the inside centre form template that is provided with of case roof beam, the centre form template includes turning and centre form lower turning on centre form roof, the centre form, and turning and centre form lower turning splice in proper order along the length direction of case roof beam and form the centre form template of accomplishing under a plurality of centre form roof, centre form.

Preferably, the inner mold top plate is formed by combining a plurality of single inner mold top plates, all the single inner mold top plates are connected through bolts, the length of each single inner mold top plate is designed to be 2-6m, and the inner mold top plate is provided with a left inner mold top plate and a right inner mold top plate.

Preferably, be connected through hinge lug coupling assembling between monolithic centre form roof and the centre form upper bracket, hinge lug coupling assembling is provided with otic placode, ear seat, round pin axle, the fixed welding of one end of monolithic centre form roof is provided with the otic placode, the fixed welding of support upside of centre form upper bracket is provided with the ear seat, it is articulated through the round pin axle between otic placode and the ear seat.

Preferably, the lug seat of the inner die upper support is hinged with a hydraulic oil cylinder, the other end of the hydraulic oil cylinder is connected with the single inner die top plate, and the hydraulic oil cylinder is an existing device and is not described in detail herein.

Preferably, the internal mold upper corner and the internal mold lower corner are both provided with two sets of corners and are located at the corners of the box girder, the internal mold upper corner is sleeved on the internal mold upper support through a telescopic sleeve, the internal mold upper corner and the internal mold lower corner are hinged, the ear seat of the internal mold upper corner and the ear seat of the internal mold lower corner are connected through a telescopic oil cylinder, the telescopic oil cylinder and the telescopic sleeve are both existing devices, and detailed description is not provided here.

The utility model provides a top plate structure of an internal mold of a segmental box girder, which has the following beneficial effects:

1. when the die assembly state is presented, the inner die top plate is divided into a left inner die top plate and a right inner die top plate, and one end of the single inner die top plate is provided with the lug plate which is hinged with the lug seat on the inner die upper support through the pin shaft. The single inner die top plate is connected with the inner die upper support through a hydraulic oil cylinder, an upper corner of the inner die is sleeved on the inner die upper support through a telescopic sleeve, a lower corner of the inner die is hinged with the upper corner of the inner die, and a telescopic oil cylinder is arranged between the lower corner of the inner die and the upper corner of the inner die. When the demolding state is presented, the hydraulic oil cylinder connected with the inner mold top plate is contracted to enable the inner mold top plate to rotate around the pin shaft to descend, then the telescopic oil cylinder is controlled to contract the inner mold upper corner and the inner mold lower corner through the telescopic oil cylinder until the inner mold top plate, the inner mold upper corner and the inner mold lower corner leave the inner wall of the box girder, and the template solves the problems of limited inner cavity space and limited inner mold contraction amount, and realizes the contraction of the template to the maximum extent.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model without limiting the utility model in which:

fig. 1 is a front view of a top plate structure of an internal mold of a segmental box girder according to the present invention;

fig. 2 is a schematic structural diagram of a top plate structure of an internal mold of a segmental box girder according to the present invention;

fig. 3 is a partial structural schematic view of a top plate structure of an internal mold of a segmental box girder according to the present invention;

fig. 4 is a partial structural schematic view of a top plate structure of an inner mold of a segmental box girder according to the present invention;

the reference signs are: 1. a box girder top mold; 2. a mold closing state; 3. a telescopic sleeve; 4. an inner mold upper support; 5. demolding state; 6. an inner mold top plate; 7. an upper corner of the inner mold; 8. a lower corner of the inner mold; 9. a box girder bottom die; 10. an inner mold template; 11. a box girder web; 12. a box girder; 13. a hinge lug connection assembly; 14. a hydraulic cylinder; 15. an ear plate; 16. a pin shaft; 17. an ear mount; 18. a single inner mold top plate; 19. a telescopic oil cylinder.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

According to the top plate structure of the internal mold of the segmental box girder shown in the figures 1 to 4, the utility model provides the following technical scheme: including compound die state 2, drawing of patterns state 5 and case roof beam 12, case roof beam 12 is provided with case roof beam cover half 1, case web 11 and case roof beam die block 9 to wholly be trapezoidal setting, the inside centre form template 10 that is provided with of case roof beam 12, centre form template 10 includes that centre form roof 6, centre form go up turning 7 and centre form lower turning 8, and turning 7 and centre form lower turning 8 splice in proper order along the length direction of case roof beam 12 and form the centre form template 10 of accomplishing under a plurality of centre form roof 6, centre form.

As shown in fig. 1, the present embodiment provides a segment box girder internal mold top plate structure, which is characterized in that: the inner die top plate 6 is formed by combining a plurality of inner die top plates 18, all the inner die top plates are connected through bolts, the length of each inner die top plate 18 is designed to be 2-6m, and the inner die top plate 6 is provided with a left inner die top plate and a right inner die top plate.

As shown in fig. 3, the present embodiment provides a segment box girder internal mold top plate structure, which is characterized in that: be connected through hinge lug coupling assembling 13 between monolithic centre form roof 18 and the centre form upper bracket 4, hinge lug coupling assembling 13 is provided with otic placode 15, ear seat 17, round pin axle 16, the fixed welding of one end of monolithic centre form roof 18 is provided with otic placode 15, the fixed welding of support upside of centre form upper bracket 4 is provided with ear seat 17, it is articulated through round pin axle 16 between otic placode 15 and the ear seat 17.

As shown in fig. 2, the present embodiment provides a segment box girder internal mold top plate structure, which is characterized in that: the ear seats of the inner die upper support 4 are hinged with a hydraulic oil cylinder 14, the other end of the hydraulic oil cylinder 14 is connected with a single inner die top plate 18, and the hydraulic oil cylinder 14 is an existing device and is not described in detail herein.

As shown in fig. 1, the present embodiment provides a segment box girder internal mold top plate structure, which is characterized in that: the internal mold upper corner 7 and the internal mold lower corner 8 are both provided with two sets and are located at the corners of the box girder 12, the internal mold upper corner 7 is sleeved on the internal mold upper support 4 through the telescopic sleeve 3, the internal mold upper corner 7 is hinged with the internal mold lower corner 8, the ear seat of the internal mold upper corner 7 is connected with the ear seat of the internal mold lower corner 8 through the telescopic oil cylinder 19, the telescopic oil cylinder 19 and the telescopic sleeve 3 are both existing devices, and detailed description is not provided here.

The working principle of the utility model is as follows: when the die assembly state is presented, the internal die top plate 6 is divided into a left internal die top plate and a right internal die top plate, one end of the single internal die top plate 18 is provided with an ear plate 15, and the ear plate 15 is hinged with an ear seat 17 on the internal die upper support 4 through a pin shaft 16. The single inner die top plate 18 is connected with the inner die upper support 4 through the hydraulic oil cylinder 14, the inner die upper corner 7 penetrates through the telescopic sleeve 3 to be sleeved on the inner die upper support 4, the inner die lower corner 8 is hinged with the inner die upper corner 7, and the telescopic oil cylinder is arranged between the inner die upper corner and the inner die lower corner.

When the demolding state 5 is presented, the hydraulic oil cylinder 14 connected with the inner mold top plate 6 is contracted to enable the inner mold top plate 6 to rotate and descend around the pin shaft 16, and then the telescopic oil cylinder is controlled to contract the inner mold upper corner 7 and the inner mold lower corner 8 through the telescopic oil cylinder until the inner mold top plate 6, the inner mold upper corner 7 and the inner mold lower corner 8 leave the inner wall of the box girder.

In the drawings of the disclosed embodiments of the utility model, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the utility model can be combined with each other without conflict; the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a section case roof beam centre form roof structure, includes compound die state (2), drawing of patterns state (5), case roof beam (12), hydraulic cylinder (14), telescopic cylinder (19) and telescope tube (3), its characterized in that: case roof beam (12) are provided with case roof beam cover half (1), case roof beam web (11) and case roof beam die block (9) to wholly be trapezoidal setting, case roof beam (12) inside is provided with centre form template (10), centre form template (10) include centre form roof (6), centre form upper corner (7) and centre form lower corner (8), and corner (7) and centre form lower corner (8) splice in proper order along the length direction of case roof beam (12) and form centre form template (10) of accomplishing on a plurality of centre form roof (6), centre form roof (6) adopt by the combination formation of a plurality of monoblock centre form roof (18), be connected through hinge ear coupling assembling (13) between monoblock centre form roof (18) and the centre form upper bracket (4), hinge ear coupling assembling (13) are provided with otic placode (15), ear seat (17), round pin axle (16).

2. The internal mold top plate structure of a segmental box girder according to claim 1, characterized in that: all the single internal mold top plates (18) are connected through bolts, the length of each single internal mold top plate (18) is designed to be 2-6m, and the internal mold top plate (6) is provided with a left internal mold top plate and a right internal mold top plate.

3. The internal mold top plate structure of a segmental box girder according to claim 1, characterized in that: one end of the single inner die top plate (18) is fixedly welded with an ear plate (15), the upper side of the bracket of the inner die upper bracket (4) is fixedly welded with an ear seat (17), and the ear plate (15) is hinged with the ear seat (17) through a pin shaft (16).

4. The internal mold top plate structure of a segmental box girder according to claim 1, characterized in that: the lug seat of the inner die upper support (4) is hinged with a hydraulic oil cylinder (14), and the other end of the hydraulic oil cylinder (14) is connected with a single inner die top plate (18).

5. The internal mold top plate structure of a segmental box girder according to claim 1, characterized in that: the inner die upper corner (7) and the inner die lower corner (8) are provided with two sets and located at the corners of the box girder (12), the inner die upper corner (7) is sleeved on the inner die upper support (4) through the telescopic sleeve (3), the inner die upper corner (7) and the inner die lower corner (8) are hinged, and the ear seats of the inner die upper corner (7) and the ear seats of the inner die lower corner (8) are connected through the telescopic oil cylinder (19).