Adjustable railway prefabricated box girder outer mold

Abstract

The utility model relates to an adjustable railway precast box girder outer mould which comprises a bottom mould, a side mould, a flange mould plate, a support and the like, the side mould is composed of an upper mould plate, a lower mould plate, an upper support plate, a lower support plate and the like, angle fine adjustment is achieved through an adjusting lead screw, the requirement that a box girder is provided with an inverted arch is met, and field assembly errors are adapted. The flange formwork comprises a flange baffle and a flange supporting plate, and the included angle is adjusted through an adjusting bolt. According to the design, the universality, the accuracy and the durability of the template are improved, welding procedures are reduced, the production efficiency and the product quality are improved, stress concentration and weld joint corrosion are reduced, the service life is prolonged, and the maintenance and replacement cost is reduced through the integrated forming technology. The method is suitable for the fields of box girder construction and related constructional engineering.

Description

TECHNICAL FIELD

[0001] The utility model relates to building template technical field especially relates to adjustable railway prefabricated box girder outer form. BACKGROUND

[0002] Box girder, a kind of beam in bridge engineering, hollow inside, with flange on upper part, similar to box, hence the name, box girder is a kind of building auxiliary tool in industrial construction, it is generally used in the manufacturing process of reinforced concrete structure, there are different forms of box girder model for different situations, such as the steel box girder needed for manufacturing large bridge, the name comes from the fact that the shape is like a box.

[0003] In the construction of traditional prefabricated box girder, the connecting structure of the flange baffle of prefabricated box girder formwork and box girder side formwork mostly adopts bolted connection+welded connection mode, this mode has many defects, such as the template site assembly is more cumbersome, the precision control of assembly size is not good, which affects construction efficiency and quality, the flatness of bolted connection+welded connection template panel is not good, the welding seam is easy to polish out of place, the linear of two side flange chamfers is poor, concrete is easy to be carried in gap during demolding, which causes concrete defects, which not only affects the appearance of beam body, increases the repair cost in later period, and also affects the quality of beam body itself, at the same time, it also reduces the service life of formwork and the turnover frequency of formwork. UTILITY MODEL CONTENTS

[0004] In order to solve the above problems, the utility model provides an adjustable railway prefabricated box girder outer form to more exactly solve the above problems.

[0005] The utility model realizes the following technical scheme:

[0006] The utility model provides an adjustable railway prefabricated box girder outer form, including bottom die, side die, flange formwork, support, tension bolt, beam making pedestal and embedded steel plate, bottom die is fixed at the top of beam making pedestal, and its side edge is fixedly connected with side die;Side die includes side die upper template, side die lower template, side die upper back rafter, side die lower back rafter, side die upper adjusting lead screw, side die lower adjusting lead screw, ear plate seat, the bottom of side die upper template is fixedly connected with the top of side die lower template, the bottom of side die upper back rafter and the top of side die lower back rafter are movably connected, the top of side die upper adjusting lead screw is hinged with side die upper back rafter, and the bottom is fixedly connected with support, the top of side die lower adjusting lead screw is fixedly connected with side die lower back rafter, and the bottom is fixedly connected with embedded steel plate, tension bolt passes through side die lower back rafter, side die lower template and bottom die, so that the three are fixedly pulled tight;

[0007] The flange template comprises a flange baffle, a flange support plate and an adjusting bolt, the flange support plate is fixed at the end of the upper template of the side mold, the flange baffle is arranged at the top of the flange support plate, and the two are fixedly connected through the adjusting bolt;

[0008] The support comprises a side mold truss, a longitudinal connecting channel steel, a horizontal connecting channel steel and a truss adjusting screw, the side mold truss is fixedly connected with the lower back of the side mold, the top of the side mold truss is hingedly connected with the upper back of the side mold through the upper adjusting screw of the side mold, and the bottom of the side mold truss is fixedly connected with the embedded steel plate through the truss adjusting screw.

[0009] Further, the adjusting bolts on the flange baffle and the flange support plate are arranged in three adjusting bolts as a group, the adjusting bolts on the two sides are screwed upwards and respectively penetrate the flange baffle and the flange support plate, and the adjusting bolt in the middle is screwed downwards and only penetrates the flange baffle, so that the angle between the flange baffle and the upper template of the side mold can be adjusted.

[0010] Further, the top of the upper template of the side mold and the side of the flange baffle of the flange template are integrally formed steel plates.

[0011] Further, the bottom of the upper back of the side mold and the top of the lower back of the side mold are respectively provided with an ear plate seat, and the upper back of the side mold and the lower back of the side mold are hingedly connected through the ear plate seat and the pin shaft.

[0012] Further, the longitudinal connecting channel steel and the horizontal connecting channel steel are arranged on the side mold truss as structural reinforcement.

[0013] Further, the side mold further comprises a ventilation port mold and a bridge deck drain hole fixing device, the ventilation port mold is fixedly connected with the lower template of the side mold, and the bridge deck drain hole fixing device is bolted to the top of the upper template of the side mold. Beneficial effects

[0014] 1. In terms of universality, it can adapt to different engineering needs without the need for complex customization and splicing modification as in the traditional way. Through simple parameter setting, it can accurately match, greatly improving the adaptability of the template to different engineering scenes.

[0015] 2. In terms of precision, the size accuracy and appearance flatness of the beam body are effectively guaranteed, and the precision of the product is improved.

[0016] 3. In terms of durability, due to the use of one-piece forming process, the stress concentration and potential weld corrosion problems at the welding site are reduced, the service life of the template is significantly prolonged, and the cost caused by frequent maintenance and replacement of the template is reduced.

[0017] 4. In the production process, the welding process is reduced, the production efficiency and product quality stability are improved through one-time forming, the overall concrete forming quality of construction is greatly improved, when installing, the simple and convenient characteristics save time and labor, can effectively shorten the construction period, and the formwork is convenient and smooth to demould. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of an existing railway prefabricated box girder structure;

[0019] Figure 2 It is a schematic diagram of the connection of the flange formwork and the side formwork of the existing railway prefabricated box girder;

[0020] Figure 3 It is a schematic diagram of the structure of the adjustable railway prefabricated box girder outer form along the left side of the center line;

[0021] Figure 4 It is a schematic diagram of the connection of the flange formwork and the side formwork of the adjustable railway prefabricated box girder outer form;

[0022] Figure 5 It is a left view of Figure 4 .

[0023] In the drawing: 1, bottom formwork; 2, side formwork; 3, flange formwork; 4, support; 5, tension bolt; 6, beam forming base; 7, pre-buried steel plate; 21, upper side formwork; 22, lower side formwork; 23, upper side formwork back; 24, lower side formwork back; 25, ventilation opening mold; 26, bridge deck drain hole fixing device; 27, upper side formwork adjusting lead screw; 28, lower side formwork adjusting lead screw; 29, ear plate seat; 31, flange baffle; 32, flange support plate; 33, adjusting bolt; 41, side formwork truss; 42, longitudinal connecting channel steel; 43, horizontal connecting channel steel; 44, truss adjusting lead screw. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the following will combine the technical scheme in the embodiments of the utility model for clear and complete description, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0025] Reference Figure 1 and Figure 2The original railway prefabricated box girder outer form includes a bottom die, a side die, a flange die plate and a support, wherein the bottom die is fixedly connected with the side die, the side die is fixedly connected with the flange die plate, the support is fixedly connected with the side die, the side edge of the flange baffle at the flange die plate is welded with the top edge of the upper part of the side die, and a chamfered steel plate is welded on the welding point.

[0026] Reference Figures 3-5 The adjustable railway prefabricated box girder outer form includes a bottom die 1, a side die 2, a flange die plate 3, a support 4, a tension bolt 5, a beam forming pedestal 6 and a pre-embedded steel plate 7, the bottom die 1 is fixed on the top of the beam forming pedestal 6, and the side edge thereof is fixedly connected with the side die 2; the side die 2 includes a side die upper part die plate 21, a side die lower part die plate 22, a side die upper part back brace 23, a side die lower part back brace 24, a ventilation port die 25, a bridge deck water drain hole fixing device 26, a side die upper part adjusting lead screw 27, a side die lower part adjusting lead screw 28 and an ear plate seat 29, the bottom of the side die upper part die plate 21 is fixedly connected with the top of the side die lower part die plate 22, the bottom of the side die upper part back brace 23 and the top of the side die lower part back brace 24 are respectively provided with the ear plate seat 29, the side die upper part back brace 23 and the side die lower part back brace 24 are hingedly connected through the ear plate and the pin shaft, the ventilation port die 25 is fixedly connected with the side die lower part die plate 22 through the side die lower part die plate 22, the bridge deck water drain hole fixing device 26 is bolted on the top of the side die upper part die plate 21, the top of the side die upper part adjusting lead screw 27 is hingedly connected with the side die upper part back brace 23, and the bottom is fixedly connected with the support 4, the top of the side die lower part adjusting lead screw 28 is fixedly connected with the side die lower part back brace 24, and the bottom is fixedly connected with the pre-embedded steel plate 7, and the tension bolt 5 passes through the side die lower part back brace 24, the side die lower part die plate 22 and the bottom die 1 to fix and tension them.

[0027] The flange die plate 3 includes a flange baffle 31, a flange support plate 32 and adjusting bolts 33, the flange support plate 32 is fixed on the end of the side die upper part die plate 21, the flange baffle 31 is arranged on the top of the flange support plate 32, and the two are fixedly connected through the adjusting bolts 33, the adjusting bolts 33 on the flange baffle 31 and the flange support plate 32 are arranged in three adjusting bolts 33 as a group, the adjusting bolts 33 on the two sides are upwardly threaded and respectively penetrate the flange baffle 31 and the flange support plate 32, and the adjusting bolt 33 in the middle is downwardly threaded and only penetrates the flange baffle 31, so that the included angle between the flange baffle 31 and the side die upper part die plate 21 can be adjusted.

[0028] The support 4 comprises a side mold truss 41, a longitudinal connecting channel steel 42, a horizontal connecting channel steel 43 and a truss adjusting lead screw 44, the side of the side mold truss 41 is fixedly connected with the side mold lower back rest 24, the top of the side mold truss 41 is hingedly connected with the side mold upper back rest 23 through the side mold upper adjusting lead screw 27, the bottom of the side mold truss 41 is fixedly connected with the embedded steel plate 7 through the truss adjusting lead screw 44, and the side mold truss 41 is provided with the longitudinal connecting channel steel 42 and the horizontal connecting channel steel 43 as structural reinforcement.

[0029] The top of the side mold upper formwork 21 and the side of the flange baffle of the flange formwork 3 are integrally formed steel plates.

[0030] Working principle

[0031] By adjusting the side mold upper adjusting lead screw 27, the side mold lower adjusting lead screw 28 and the truss adjusting lead screw 44, the angle between the bottom mold 1 and the side mold 2 and the angle of the side mold 2 itself can be finely adjusted to adapt to the error caused by manual assembly on site.

[0032] By adjusting the adjusting screw 33 in the middle of each group of adjusting screws 33, since the flange support plate 32 at the lower part of the rod body is not holed, the rod body abuts against the flange support plate 32, so that the included angle between the flange baffle 31 and the side mold upper formwork 21 can be slightly reduced, and by adjusting the adjusting screws 33 on both sides of each group of adjusting screws 33, since the flange baffle 31 and the flange support plate 32 are penetrated, the pressure of the nut can slightly increase the included angle between the flange baffle 31 and the side mold upper formwork 21.

[0033] The utility model has the advantages of the following production:

[0034] In terms of universality, through testing on multiple box girder projects with different design requirements, the design angle of the box girder bridge construction application covers a change range of 30°-60°, the size specification changes between 5-10 meters in length and 2-4 meters in width, and the integrally formed steel plate of the utility model only needs to adjust the bending angle and length size and other parameters on the bending machine, so that different engineering requirements can be adapted without complicated customization and splicing modification like the traditional ones, for example, if one of the box girder bridges requires that the included angle between the flange baffle and the side mold is 45° and the length of the formwork is 8 meters, the parameters can be simply set to accurately match, while the traditional formwork may need to be redesigned and the splicing parts are produced, which takes a week, and the utility model only needs one day to complete the adjustment preparation work, so that the adaptability of the formwork to different engineering scenes is greatly improved.

[0035] In terms of precision, the dimensional accuracy deviation of the utility model is controlled within ±0.5mm, the angular accuracy deviation is within ±0.5°, in a large box girder construction project, 100 installation points are detected, the average height of the traditional splicing formwork is 3mm, while the average height of the utility model is only 0.3mm, effectively ensuring the dimensional accuracy and appearance flatness of the beam body, and improving the precision of the product.

[0036] In terms of durability, due to the adoption of one-piece forming process, the stress concentration and potential weld corrosion problems of the welding part are reduced, after 50 times of repeated use of the traditional bolted + welded formwork, cracks and deformation may occur at the welding part, while the structure of the formwork of the utility model is still complete after 150 times of use, only the conventional surface cleaning and slight flatness adjustment are needed to continue using, which significantly prolongs the service life of the formwork and reduces the cost caused by frequent maintenance and replacement of the formwork.

[0037] In terms of production process, the welding process is reduced, the production efficiency and product quality stability are improved by one-time forming, from the appearance of the product, the arc chamfer makes the appearance of the product more smooth and fluent, which effectively improves the appearance quality of the beam body, in terms of construction forming, the improved scheme greatly improves the overall concrete forming quality of construction, avoids the problems of formwork misalignment and concrete slag demolding with dust, etc., when installing, the simple and convenient characteristics save time and labor, which can effectively shorten the construction period, avoid the formwork misalignment phenomenon, and the formwork is convenient to disassemble and smooth to demold, the precision is good, which effectively prolongs the service life of the formwork, has high innovation and practicality, and can be widely applied to the field of box girder construction and related building engineering.

[0038] Of course, the utility model can also have other various embodiments, based on the present embodiment, other embodiments obtained by ordinary skilled persons in the art without any creative labor belong to the scope protected by the utility model.

Claims

1. An adjustable railway prefabricated box girder outer form, comprising a bottom die (1), a side die (2), a flange formwork (3), a support (4), a tension bolt (5), a beam manufacturing stand (6) and a pre-embedded steel plate (7), characterized in that, The bottom die (1) is fixed on the top of the beam manufacturing pedestal (6), and the side edges thereof are fixedly connected with the side die (2); the side die (2) comprises a side die upper die plate (21), a side die lower die plate (22), a side die upper backrest (23), a side die lower backrest (24), a side die upper adjusting lead screw (27) and a side die lower adjusting lead screw (28); the bottom of the side die upper die plate (21) is fixedly connected with the top of the side die lower die plate (22); the bottom of the side die upper backrest (23) and the top of the side die lower backrest (24) are movably connected; the top of the side die upper adjusting lead screw (27) is hingedly connected with the side die upper backrest (23), and the bottom thereof is fixedly connected with the support (4); the top of the side die lower adjusting lead screw (28) is fixedly connected with the side die lower backrest (24), and the bottom thereof is fixedly connected with the embedded steel plate (7); the tensioning bolt (5) penetrates through the side die lower backrest (24), the side die lower die plate (22) and the bottom die (1) so as to fixedly and tightly connect the three. The flange die plate (3) comprises a flange baffle (31), a flange support plate (32) and adjusting bolts (33); the flange support plate (32) is fixed on the end of the side die upper die plate (21); the flange baffle (31) is arranged on the top of the flange support plate (32) and is fixedly connected with the flange support plate (32) through the adjusting bolts (33). The support (4) comprises a side die truss (41), longitudinal connecting channel steel (42), horizontal connecting channel steel (43) and truss adjusting lead screw (44); the side of the side die truss (41) is fixedly connected with the side die lower backrest (24); the top of the side die truss (41) is hingedly connected with the side die upper backrest (23) through the side die upper adjusting lead screw (27); the bottom of the side die truss (41) is fixedly connected with the embedded steel plate (7) through the truss adjusting lead screw (44).

2. The adjustable railway precast box girder outer form according to claim 1, characterized in that, The adjusting bolts (33) on the flange baffle (31) and the flange support plate (32) are arranged in three adjusting bolts (33) as a group; the adjusting bolts (33) on the two sides are screwed upwards and respectively penetrate through the flange baffle (31) and the flange support plate (32); the adjusting bolt (33) in the middle is screwed downwards and only penetrates through the flange baffle (31); such design can adjust the included angle between the flange baffle (31) and the side die upper die plate (21).

3. The adjustable railway precast box girder outer form according to claim 2, wherein, The top of the side die upper die plate (21) and the side of the flange baffle of the flange die plate (3) are integrally formed steel plates.

4. The adjustable railway precast box girder outer form according to claim 1, wherein, The bottom of the side die upper backrest (23) and the top of the side die lower backrest (24) are respectively provided with ear plate seats (29); the side die upper backrest (23) and the side die lower backrest (24) are hingedly connected through the ear plate seats and the pin shafts.

5. The adjustable railway precast box girder outer form according to claim 1, wherein, The longitudinal connecting channel steel (42) and the horizontal connecting channel steel (43) are arranged on the side die truss (41) as structural reinforcements.

6. The adjustable railway precast box girder outer form according to claim 1, wherein, The side die (2) further comprises a ventilation opening die (25) and a bridge deck drain hole fixing device (26); the ventilation opening die (25) penetrates through the side die lower die plate (22) and is fixedly connected therewith; the bridge deck drain hole fixing device (26) is arranged on the top of the side die upper die plate (21) and is bolted therewith.

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