Movable pedestal for producing prefabricated box girder of expressway

Abstract

The invention relates to a movable pedestal for producing a prefabricated box girder of an expressway. The movable pedestal comprises a base, a first bottom die platform, a second bottom die platform and a third bottom die platform, the first bottom die platform is fixedly connected with the base through a supporting beam and comprises a bottom die surface A; the second bottom die platform and the third bottom die platform form an L-shaped structure and are arranged on one side of the first bottom die platform; the second bottom die platform comprises a bottom die surface B and a limiting surface B, the third bottom die platform comprises a bottom die surface C and a limiting surface C, and the bottom die surface B is perpendicular to the bottom die surface C; a plurality of supporting frames are fixedly arranged between the second bottom die platform and the third bottom die platform, the supporting frames are rotationally connected with a support through supporting shafts, the support is fixedly connected with a sliding table, and the sliding table is in linear sliding connection with a base. The push-pull mechanism is used for enabling the sliding table to be far away from and cling to the first bottom die platform; the support comprises a vertical limiting face A and a vertical limiting face B which are parallel to each other and arranged back to back. According to the technical scheme, two bottom die surfaces with different widths can be switched, and the switching efficiency is high.

Description

Technical Field

[0001] The invention belongs to the technical field of prefabricated box girders, and in particular relates to a mobile pedestal for producing prefabricated box girders for expressways. Background Art

[0002] In highway and bridge projects, the length of prefabricated box girders is 20 meters, 25 meters, 30 meters, 35 meters, 40 meters, and 45 meters. The width of prefabricated box girders generally needs to be designed according to different spans and load-bearing capacities. In highway bridge projects, the common widths of prefabricated box girders are 2.4 meters and 2 meters. Among them, the 2.4-meter-wide box girder is suitable for a variety of highway bridges, and the 2-meter-wide box girder is suitable for highway bridges with medium spans.

[0003] The current mobile pedestal is generally only suitable for prefabricated box girders of one width. When a bridge of another width needs to be prefabricated, there are generally two methods: one is to repurchase it according to actual needs; the other is to modify it based on the original pedestal. The former method not only consumes a huge amount of money, but also generates considerable management costs for the idleness of the original pedestal. The latter method not only requires a large amount of modification work, but may also result in the pedestal being unable to be restored to its original width.

[0004] Patent document with publication number CN110788984A discloses a prefabricated beam pedestal width-enhancing device and its implementation method, which directly covers the top of the original table with a wider steel plate as the lower template for the prefabricated beam. Large-format steel plates are prone to deformation during hoisting and storage. When the deformed steel plate is covered on the top of the original table as a new lower template, it is difficult to keep the lower template flat due to the deformation; and this wider steel plate will generate management costs when not in use.

[0005] The Chinese utility model patent with publication number CN218948028U discloses a device that can widen various beam-making pedestals. It welds angle steels on the sides of the original pedestals and supports several jacks at the bottom of the angle steels. The overall width of the pedestal is increased by increasing the top width of the angle steels. First, the welding itself causes the pedestal to be unable to return to its original width; second, a lot of leveling work is required before welding the angle steels, and the workload of the welding work itself is also very large. Summary of the invention

[0006] The technical problem to be solved by the present invention is to make up for the deficiencies of the prior art and provide a mobile pedestal for producing prefabricated box girders for expressways, so as to facilitate switching between two widths of different specifications according to actual needs.

[0007] To solve the above technical problems, the technical solution of the present invention is: A mobile pedestal for producing prefabricated box girders for expressways, comprising a base, a first bottom mold platform, a second bottom mold platform and a third bottom mold platform; The first bottom mold platform includes a bottom mold surface A, and the first bottom mold platform is fixedly connected to the base through a support beam below; the second bottom mold platform and the third bottom mold platform form an L-shaped structure and are arranged on one side of the first bottom mold platform; The second bottom mold platform includes a bottom mold surface B and a limit surface B which are parallel to each other and arranged opposite to each other, and the third bottom mold platform includes a bottom mold surface C and a limit surface C which are parallel to each other and arranged opposite to each other, and the bottom mold surface B and the bottom mold surface C are perpendicular to each other; a plurality of support frames are fixedly arranged between the second bottom mold platform and the third bottom mold platform, the support frames are rotatably connected to the supports through support shafts, the supports are fixedly connected to the slide, and the slide is linearly slidably connected to the base; and a push-pull mechanism is also included for moving the slide away from and close to the first bottom mold platform; The support includes a vertical limit surface A and a vertical limit surface B which are parallel to each other and arranged back to back. When the second bottom mold platform is rotated to a vertical state, the limit surface B abuts against the vertical limit surface B, then the third bottom mold platform is horizontal, and the bottom mold surface C and the bottom mold surface A are located in the same horizontal plane; when the third bottom mold platform is rotated to a vertical state, the limit surface C abuts against the vertical limit surface A, then the second bottom mold platform is horizontal, and the bottom mold surface B and the bottom mold surface A are located in the same horizontal plane.

[0008] Furthermore, the push-pull mechanism is a telescopic cylinder, which includes a cylinder body and a telescopic rod. A hinge ear B is fixedly provided on the end of the cylinder body facing away from the telescopic rod. The hinge ear B is rotatably connected to the hinge ear C through a pin, and the hinge ear C is fixedly connected to the support beam; the overhanging end of the telescopic rod is rotatably connected to the hinge ear A through a pin, and the hinge ear A is fixedly connected to the support.

[0009] Furthermore, the telescopic cylinder is a hydraulic cylinder or an electric cylinder.

[0010] Furthermore, the linear sliding connection between the slide and the base is as follows: a slider is fixedly provided at the bottom of the slide, the slider is matched and slidably connected with the linear guide rail, and the linear guide rail is fixedly connected with the base.

[0011] Furthermore, a U-shaped channel steel is fixedly provided on the side of the first bottom mold platform facing the second bottom mold platform and the third bottom mold platform, and a slurry-stopping rubber strip is clamped in the U-shaped channel steel. The slurry-stopping rubber strip is used for sealingly abutting against the second bottom mold platform and the third bottom mold platform.

[0012] Furthermore, the sealing plates at the front and rear ends of the support beam are provided with a plurality of through holes T for screw rods to pass through, and the two front and rear adjacent movable pedestals are fixedly connected by the screw rods and nuts.

[0013] Furthermore, the width of the bottom mold surface A of the first bottom mold platform is W1, the width of the bottom mold surface B of the second bottom mold platform is W2, the width of the bottom mold surface C of the third bottom mold platform is W3, and W1>W3>W2.

[0014] Further, W1=1.4m, W2=0.6m, W3=1m.

[0015] Furthermore, the plates to which the bottom mold surface A, bottom mold surface B and bottom mold surface C belong are all stainless steel composite plates, and the bottom mold surface A, bottom mold surface B and bottom mold surface C are all stainless steel clad outer surfaces.

[0016] Further, the method of use is: When the bottom mold surface A and the bottom mold surface C need to be combined to form the first width, the slide table is moved away from the first bottom mold platform by the push-pull mechanism; the L-shaped structure formed by the second bottom mold platform and the third bottom mold platform is rotated to make the third bottom mold platform horizontal; the slide table is moved close to the first bottom mold platform by the push-pull mechanism until the bottom mold surface C is close to the bottom mold surface A; When the bottom mold surface A and the bottom mold surface B need to be combined to form the second width, the slide is moved away from the first bottom mold platform by the push-pull mechanism; the L-shaped structure formed by the second bottom mold platform and the third bottom mold platform is rotated to make the second bottom mold platform horizontal; the slide is moved close to the first bottom mold platform by the push-pull mechanism until the bottom mold surface B is close to the bottom mold surface A.

[0017] The beneficial effects that can be achieved by the present invention are as follows: in the present technical solution, the bottom mold plate A can be conveniently switched with the bottom mold surface B or the bottom mold surface C according to actual needs to form two bottom mold surfaces of different widths; the switching process does not require leveling, welding, disassembly and assembly, and the switching efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of state 1 of an embodiment of the present invention.

[0019] Figure 2 It is a front view of state 2 of embodiment of the present invention.

[0020] Figure 3 It is the main view of the switching process status of the embodiment of the present invention.

[0021] Figure 4 yes Figure 1 Magnified view of section A.

[0022] Figure 5 It is a stereoscopic diagram of state 1 of embodiment of the present invention (angle 1).

[0023] Figure 6 It is a stereoscopic diagram of state one of the embodiment of the present invention (angle two).

[0024] Figure 7It is a stereoscopic diagram of state one of the embodiment of the present invention (angle three).

[0025] Figure 8 It is a stereogram of state 2 of embodiment of the present invention.

[0026] In the figure: 1-base, 2-support beam, 201-through hole T, 3-first bottom mold platform, 301-bottom mold surface A, 302-U-shaped channel steel, 303-slurry-stopping rubber strip, 4-second bottom mold platform, 401-bottom mold surface B, 402-limiting surface B, 5-third bottom mold platform, 501-bottom mold surface C, 502-limiting surface C, 6-support frame, 7-support shaft, 8-support, 801-vertical limiting surface A, 802-vertical limiting surface B, 9-slide, 10-linear guide rail, 11-slider, 12-hinge ear A, 13-telescopic cylinder, 14-hinge ear B, 15-hinge ear C. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] like Figure 1-Figure 3 As shown, a mobile pedestal for producing prefabricated box girders for highways includes a base 1, a first bottom mold platform 3, a second bottom mold platform 4 and a third bottom mold platform 5.

[0029] The first bottom mold platform 3 includes a bottom mold surface A301 , the bottom mold surface A301 has a width W1 , W1 = 1.4 m. A support beam 2 is welded below the first bottom mold platform 3 , and the bottom of the support beam 2 is welded to the base 1 .

[0030] The second bottom mold platform 4 and the third bottom mold platform 5 are welded into an L-shaped structure and are arranged on one side of the first bottom mold platform 3 .

[0031] The second bottom mold platform 4 includes a bottom mold surface B401 and a limit surface B402 which are parallel to each other and disposed opposite to each other, and the width of the bottom mold surface B401 is W2, W2=0.6m. The third bottom mold platform 5 includes a bottom mold surface C501 and a limit surface C502 which are parallel to each other and disposed opposite to each other, and the width of the bottom mold surface C501 is W3, W3=1m. The bottom mold surface B401 is perpendicular to the bottom mold surface C501.

[0032] A plurality of support frames 6 are welded between the second bottom mold platform 4 and the third bottom mold platform 5. Figure 7 As shown, the support frame 6 is rotatably connected to the support 8 through the support shaft 7, the support 8 is fixedly connected to the slide 9, the slide 9 is linearly slidably connected to the base 1, and the sliding connection method is: a slider 11 is fixedly provided at the bottom of the slide 9, the slider 11 is matched and slidably connected with the linear guide 10, and the linear guide 10 is fixedly connected to the base 1.

[0033] It also includes a push-pull mechanism for moving the slide 9 away from and close to the first bottom mold platform 3. The push-pull mechanism in this embodiment is a hydraulic telescopic cylinder 13, including a cylinder body and a telescopic rod, a hinge ear B14 is fixedly provided on the end of the cylinder body facing away from the telescopic rod, the hinge ear B14 is rotatably connected to the hinge ear C15 through a pin, and the hinge ear C15 is fixedly connected to the support beam 2; the overhanging end of the telescopic rod is rotatably connected to the hinge ear A12 through a pin, and the hinge ear A12 is fixedly connected to the support 8.

[0034] The support 8 includes a vertical limit surface A801 ​​and a vertical limit surface B802 which are parallel to each other and arranged back to back. When the second bottom mold platform 4 is rotated to a vertical state, the limit surface B402 abuts against the vertical limit surface B802, and the third bottom mold platform 5 is horizontal, and the bottom mold surface C501 and the bottom mold surface A301 are located in the same horizontal plane; when the third bottom mold platform 5 is rotated to a vertical state, the limit surface C502 abuts against the vertical limit surface A801, and the second bottom mold platform 4 is horizontal, and the bottom mold surface B401 and the bottom mold surface A301 are located in the same horizontal plane.

[0035] A U-shaped channel steel 302 is fixedly provided on one side of the first bottom mold platform 3 facing the second bottom mold platform 4 and the third bottom mold platform 5, and a slurry-stopping rubber strip 303 is clamped in the U-shaped channel steel 302. The slurry-stopping rubber strip 303 is used to seal and abut against the second bottom mold platform 4 and the third bottom mold platform 5. Figure 4 shown.

[0036] The movable platform is generally divided into sections according to the total length of the box beam. In order to connect the two adjacent movable platforms in front and behind, a number of through holes T201 are provided on the cover plates at the front and rear ends of the support beam 2. The screw passes through the corresponding through holes T201 and the back nuts on the two movable platforms in front and behind to fix the two movable platforms in connection.

[0037] The corresponding plates of the bottom mold surface A301, the bottom mold surface B401 and the bottom mold surface C501 are all stainless steel composite plates, which are composite steel plates formed by combining a carbon steel base layer with a stainless steel coating. The bottom mold surface A301, the bottom mold surface B401 and the bottom mold surface C501 are all stainless steel coating outer surfaces. As a mold surface, generally, the flatness and smoothness are relatively good. Stainless steel materials are more in line with application requirements, but the cost of stainless steel is very high. In this embodiment, a stainless steel composite plate is used, which not only ensures the flatness and smoothness of the bottom mold surface A301, the bottom mold surface B401 and the bottom mold surface C501, but also reduces the cost.

[0038] How to use: When the bottom mold surface A301 and the bottom mold surface C501 are combined to form a width of 2.4 meters, the slide 9 is moved away from the first bottom mold platform 3 by the push-pull mechanism; the L-shaped structure (such as Figure 3As shown), the third bottom mold platform 5 is in a horizontal state; the slide 9 is moved close to the first bottom mold platform 3 by the push-pull mechanism until the bottom mold surface C501 is close to the bottom mold surface A301, as shown Figure 1 , Figure 5-Figure 7 shown.

[0039] When the bottom mold surface A301 and the bottom mold surface B401 are combined to form a width of 2 meters, the slide 9 is moved away from the first bottom mold platform 3 by the push-pull mechanism; the L-shaped structure (such as Figure 3 As shown), the second bottom mold platform 4 is in a horizontal state; the slide 9 is moved close to the first bottom mold platform 3 by the push-pull mechanism until the bottom mold surface B401 is close to the bottom mold surface A301, as shown Figure 2 shown.

[0040] In this embodiment, corresponding slurry-stopping rubber strips are installed on the corresponding side molds.

[0041] The above is only one embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiment. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications made without departing from the idea of ​​the present invention are all within the protection scope of the present invention.

Claims

1. A mobile pedestal for producing prefabricated box girders for expressways, characterized by: It comprises a base (1), a first bottom mold platform (3), a second bottom mold platform (4) and a third bottom mold platform (5); The first bottom mold platform (3) comprises a bottom mold surface A (301), and the first bottom mold platform (3) is fixedly connected to the base (1) via a support beam (2) below; the second bottom mold platform (4) and the third bottom mold platform (5) form an L-shaped structure and are arranged on one side of the first bottom mold platform (3); The second bottom mold platform (4) comprises a bottom mold surface B (401) and a limit surface B (402) which are parallel to each other and arranged opposite to each other, and the third bottom mold platform (5) comprises a bottom mold surface C (501) and a limit surface C (502) which are parallel to each other and arranged opposite to each other, and the bottom mold surface B (401) and the bottom mold surface C (501) are perpendicular to each other; a plurality of support frames (6) are fixedly arranged between the second bottom mold platform (4) and the third bottom mold platform (5), the support frames (6) are rotatably connected to the support (8) through the support shaft (7), the support (8) is fixedly connected to the slide (9), and the slide (9) is linearly slidably connected to the base (1); and a push-pull mechanism is also included, which is used to move the slide (9) away from and close to the first bottom mold platform (3); The support (8) comprises a vertical limiting surface A (801) and a vertical limiting surface B (802) which are parallel to each other and arranged opposite to each other. When the second bottom mold platform (4) is rotated to a vertical state, the limiting surface B (402) abuts against the vertical limiting surface B (802), the third bottom mold platform (5) is horizontal, and the bottom mold surface C (501) and the bottom mold surface A (301) are located in the same horizontal plane; when the third bottom mold platform (5) is rotated to a vertical state, the limiting surface C (502) abuts against the vertical limiting surface A (801), the second bottom mold platform (4) is horizontal, and the bottom mold surface B (401) and the bottom mold surface A (301) are located in the same horizontal plane.

2. The mobile pedestal for producing prefabricated box girders for highways according to claim 1 is characterized by: The push-pull mechanism is a telescopic cylinder (13), the telescopic cylinder (13) comprising a cylinder body and a telescopic rod, a hinge ear B (14) being fixedly provided at one end of the cylinder body facing away from the telescopic rod, the hinge ear B (14) being rotatably connected to a hinge ear C (15) via a pin, the hinge ear C (15) being fixedly connected to the support beam (2); the overhanging end of the telescopic rod being rotatably connected to a hinge ear A (12) via a pin, the hinge ear A (12) being fixedly connected to the support (8).

3. The mobile pedestal for producing prefabricated box girders for highways according to claim 2 is characterized by: The telescopic cylinder (13) is a hydraulic cylinder or an electric cylinder.

4. The mobile pedestal for producing prefabricated box girders for highways according to claim 1 is characterized by: The linear sliding connection between the slide (9) and the base (1) is as follows: a slider (11) is fixedly provided at the bottom of the slide (9), the slider (11) is matched and slidably connected to the linear guide rail (10), and the linear guide rail (10) is fixedly connected to the base (1).

5. The mobile pedestal for producing prefabricated box girders for highways according to claim 1 is characterized by: A U-shaped channel steel (302) is fixedly provided on one side of the first bottom mold platform (3) facing the second bottom mold platform (4) and the third bottom mold platform (5), and a slurry-stopping rubber strip (303) is clamped in the U-shaped channel steel (302). The slurry-stopping rubber strip (303) is used for sealingly abutting against the second bottom mold platform (4) and the third bottom mold platform (5).

6. The mobile pedestal for producing prefabricated box girders for highways according to claim 1 is characterized by: The front and rear end sealing plates of the support beam (2) are both provided with a plurality of through holes T (201) for screw rods to pass through, and two front and rear adjacent movable pedestals are fixedly connected via the screw rods and nuts.

7. The mobile pedestal for producing prefabricated box girders for highways according to claim 1 is characterized by: The bottom mold surface A (301) of the first bottom mold platform (3) has a width of W1, the bottom mold surface B (401) of the second bottom mold platform (4) has a width of W2, the bottom mold surface C (501) of the third bottom mold platform (5) has a width of W3, and W1>W3>W2.

8. The mobile pedestal for producing prefabricated box beams for highways according to claim 7 is characterized by: W1=1.4m, W2=0.6m, W3=1m.

9. The mobile pedestal for producing prefabricated box girders for highways according to claim 1 is characterized by: The plates to which the bottom mold surface A (301), the bottom mold surface B (401) and the bottom mold surface C (501) belong are all stainless steel composite plates, and the bottom mold surface A (301), the bottom mold surface B (401) and the bottom mold surface C (501) are all stainless steel clad outer surfaces.

10. The mobile pedestal for producing prefabricated box beams for highways according to claim 1 is characterized by: How to use: When the bottom mold surface A (301) and the bottom mold surface C (501) need to be combined to form a first width, the slide table (9) is moved away from the first bottom mold platform (3) by means of a push-pull mechanism; the L-shaped structure formed by the second bottom mold platform (4) and the third bottom mold platform (5) is rotated so that the third bottom mold platform (5) is in a horizontal state; the slide table (9) is moved close to the first bottom mold platform (3) by means of a push-pull mechanism until the bottom mold surface C (501) is in close contact with the bottom mold surface A (301); When the bottom mold surface A (301) and the bottom mold surface B (401) need to be combined to form a second width, the slide table (9) is moved away from the first bottom mold platform (3) by means of a push-pull mechanism; the L-shaped structure formed by the second bottom mold platform (4) and the third bottom mold platform (5) is rotated so that the second bottom mold platform (4) is in a horizontal state; and the slide table (9) is moved close to the first bottom mold platform (3) by means of a push-pull mechanism until the bottom mold surface B (401) is in close contact with the bottom mold surface A (301).

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