Die for combined small-radius single-box double-chamber steel box girder

Abstract

The utility model relates to the field of building construction, and discloses a combined mold for a small-radius single-box double-chamber steel box girder, which comprises an outer mold, the left side and the right side of the outer mold are fixedly connected with supporting plates, the bottoms of the supporting plates are fixedly connected with supporting columns, and the inner wall of the side surface of the outer mold is fixedly connected with a top sealing assembly. A connecting sleeve is slidably connected to the interior of the outer mold, a sealing sleeve is fixedly connected to the interior of the connecting sleeve, a double-end threaded column is slidably connected to the interior of the sealing sleeve, a threaded cover is in threaded connection to the periphery of the double-end threaded column, a cushion block is connected to the inner side of the threaded cover in an abutting mode, and an inner mold is slidably connected to the periphery of the connecting sleeve. According to the utility model, through the arrangement of the connecting sleeve and the sealing sleeve, the double-end threaded column is arranged in the connecting sleeve to position the inner mold and the outer mold, so that deviation during concrete pouring is prevented, meanwhile, the double-end threaded column is prevented from being bonded with concrete, and the inner mold and the outer mold can be conveniently demolded.

Description

Technical Field

[0001] The utility model relates to the field of construction engineering, in particular to a mold for a combined small-radius single-box double-chamber steel box girder. Background Technique

[0002] The box girder is an important form of the beam in bridge engineering. Because its interior is hollow and there are flanges on both sides of the upper part, it gets its name because it resembles a box. The box girder is generally composed of a cover plate, a web plate, a bottom plate and a partition plate, and its cross-sectional shape is similar to that of a common box section. Common box girders are divided into single-box and multi-box types, and are classified according to materials. The steel box girder is generally processed in the factory and then transported to the site for installation. Among them, the single-box double-chamber steel box girder means that the box girder cross-section has only one box body, but the interior is divided into two chambers. This structural form is widely used in bridge construction because of its unique advantages.

[0003] After retrieval, the Chinese patent publication number: CN208197113U discloses a mold structure for a precast concrete box girder, including a pedestal, side formwork and an internal mold. The outside of the side formwork has columns; openings are respectively arranged at both ends of the pedestal, steel backing plates are installed at the openings, channel steels are respectively arranged on both sides of the pedestal, and sealing rubber bars are arranged in the channel steels. The side formwork is closely attached to the sealing rubber bars; adjusting tools are arranged at the lower ends of the columns on the outside of the side formwork; the lower parts of the columns are connected by lower mold-closing screws, and the upper parts of the columns are connected by upper mold-closing screws; a number of threaded screw rods are embedded in the pedestal. After the upper end of the threaded screw rod passes through the bottom plate of the internal mold, the internal mold is locked and fixed by a locking bolt. The structure of the utility model is simple, the erection of the mold can be completed quickly, the erection efficiency of the mold is improved, and the sealing performance and stability of the mold are better, and the erection quality is higher, so that the structural stability and forming quality of the box girder can be improved.

[0004] Although this technology can conveniently and quickly complete the erection of the mold, concrete and a reinforced concrete paving layer will be injected between the internal mold and the external mold of the box girder. In order to ensure that the internal mold and the external mold will not shift, threaded columns are added between the internal mold and the external mold for positioning. However, in actual use, the poured concrete will solidify at a relatively fast speed. After the concrete solidifies, the positioned threaded columns will be fixed inside the concrete and are difficult to extract, resulting in difficult demolding of the box girder. Therefore, a mold for a combined small-radius single-box double-chamber steel box girder is proposed to solve the above problems. Content of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides a mold for a combined small-radius single-box double-chamber steel box girder, aiming to improve the problems such as difficult demolding of the box girder caused by directly inserting threaded columns in the prior art.

[0006] To achieve the above object, the present utility model adopts the following technical solution: A mold for a combined small-radius single-box double-chamber steel box girder, including an outer mold. Both the left and right sides of the outer mold are fixedly connected with support plates. The bottom of the support plates is fixedly connected with several groups of support columns. The inner wall of the side surface of the outer mold is fixedly connected with a capping assembly, and the capping assembly is used for sealing the top of the outer mold. A connecting sleeve is slidably connected inside the outer mold. A sealing sleeve is fixedly connected inside the connecting sleeve. A double-headed threaded column is slidably connected inside the sealing sleeve. The outer circumference of the double-headed threaded column is threadedly connected with a threaded cap. A cushion block is in contact with the inner side of the threaded cap. An inner mold is slidably connected to the outer circumference of the connecting sleeve.

[0007] As a further description of the above technical solution:

[0008] Both the front and rear sides of the support plate are fixedly connected with slide rails. A positioning block is slidably connected inside the slide rails. An end cap is fixedly connected to the inner side of the positioning block. An outer positioning groove is opened on the inner side of the end cap. An inner positioning groove is opened on the inner side of the end cap.

[0009] As a further description of the above technical solution:

[0010] The capping assembly includes a baffle plate. The outer side of the baffle plate is fixedly connected inside the outer mold. The top of the baffle plate is fixedly connected with a top plate.

[0011] As a further description of the above technical solution:

[0012] There are two groups of the cushion blocks. The two groups of cushion blocks are symmetrically arranged on the outer circumference of both ends of the connecting sleeve. The inside of the cushion blocks is slidably connected to the outer circumference of the connecting sleeve.

[0013] As a further description of the above technical solution:

[0014] The outer side of the inner cushion block is in contact with the inner wall of the inner mold, and the outer cushion block is in contact with the outer wall of the outer mold.

[0015] As a further description of the above technical solution:

[0016] The outer circumference of the outer mold is slidably connected inside the outer positioning groove, and the front and rear sides of the top plate are slidably connected inside the outer positioning groove.

[0017] As a further description of the above technical solution:

[0018] The outer circumference of the inner mold is slidably connected inside the inner positioning groove.

[0019] The present utility model has the following beneficial effects:

[0020] 1. In the present utility model, by providing a connecting sleeve and a sealing sleeve, a double-headed threaded column is arranged inside the connecting sleeve to position the inner mold and the outer mold, preventing deviation during concrete pouring. At the same time, it is ensured that the double-headed threaded column will not adhere to the concrete. After the double-headed threaded column is withdrawn, the inner mold and the outer mold can be easily demolded.

[0021] 2. In the present utility model, by providing a slide rail and a positioning block, the end caps can be first placed at the front and rear ends of the outer mold, and then the positions of the end caps can be finely adjusted so that the outer positioning grooves and the inner positioning grooves can be aligned with the inner mold and the outer mold, thus completing the docking of the end caps, and the installation of the end caps is relatively convenient. Description of the Drawings

[0022] Figure 1 is the overall front view schematic diagram of a mold for a combined small-radius single-box double-chamber steel box girder proposed by the present utility model;

[0023] Figure 2 is the front cross-sectional view schematic diagram of the inner mold of a mold for a combined small-radius single-box double-chamber steel box girder proposed by the present utility model;

[0024] Figure 3 is the front view schematic diagram of the connecting sleeve of a mold for a combined small-radius single-box double-chamber steel box girder proposed by the present utility model.

[0025] Legend Explanation:

[0026] 1. Outer mold; 2. Support plate; 3. Support column; 4. Baffle; 5. Top plate; 6. Connecting sleeve; 7. Sealing sleeve; 8. Double-headed threaded column; 9. Spacer block; 10. Threaded cap; 11. Inner mold; 12. Slide rail; 13. Positioning block; 14. End cap; 15. Outer positioning groove; 16. Inner positioning groove. Detailed Embodiment

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0028] Refer to Figure 1 - Figure 2, an embodiment provided by the present utility model: a mold for a combined small-radius single-box double-chamber steel box girder, including an outer mold 1. On the left and right sides of the outer mold 1, a set of support plates 2 for fixed support are respectively fixedly connected. At the bottom of the support plate 2, a support column 3 is fixedly connected. There are multiple groups of support columns 3, which are linearly and evenly distributed at the bottom of the support plate 2. The support column 3 is connected to the construction support frame to support the outer mold 1. On the inner wall of the side of the outer mold 1, a capping component is fixedly connected. The capping component is used for sealing the top of the outer mold 1. The capping component includes a baffle 4. The outside of the baffle 4 is fixedly connected inside the outer mold 1. There are two groups of baffles 4, which are symmetrically arranged on the left and right inside the outer mold 1. At the top of the baffle 4, a top plate 5 for capping is fixedly connected.

[0029] Refer to Figure 2 - Figure 3 , inside the outer mold 1, there is a sliding connection with a connecting sleeve 6. There are multiple groups of connecting sleeves 6, which are linearly and evenly distributed on the inner wall of the bottom surface and the left and right side walls of the outer mold 1. The connecting sleeve 6 is made of high-molecular plastic material and can be quickly pulled and disconnected during demolding. Inside the connecting sleeve 6, a sealing sleeve 7 is fixedly connected. Inside the sealing sleeve 7, a double-headed threaded column 8 is slidably connected. The sealing sleeve 7 can prevent concrete from entering and contacting the double-headed threaded column 8 after the connecting sleeve 6 is squeezed and broken. On the outer circumference of the double-headed threaded column 8, a threaded cover 10 is threadedly connected. There are two groups of threaded covers 10, which are symmetrically arranged at both ends of the double-headed threaded column 8. Inside the threaded cover 10, there is a contact with a cushion block 9. The cushion block 9 is made of elastic rubber and can deform after being squeezed. There are two groups of cushion blocks 9, and the two groups of cushion blocks 9 are symmetrically arranged on the outer circumference at both ends of the connecting sleeve 6. Inside the cushion block 9, it is slidably connected to the outer circumference of the connecting sleeve 6. On the outer circumference of the connecting sleeve 6, an inner mold 11 is slidably connected. The outside of the inner cushion block 9 is in contact with the inner wall of the inner mold 11, and the outer cushion block 9 is in contact with the outer wall of the outer mold 1. The cushion block 9 made of rubber can be conveniently cut, and the cushion block 9 can be quickly cut into a shape similar to the slope of the inner mold 11 and the side wall of the outer mold, so as to increase the contact area and locking force of the threaded cover 10.

[0030] Refer to Figure 1 , on the front and back sides of the support plate 2, a set of slide rails 12 are respectively fixedly connected. Inside the slide rail 12, a positioning block 13 is slidably connected. Inside the positioning block 13, an end cover 14 is fixedly connected. The end cover 14 can seal the two ends of the inner mold 11 and the outer mold 1. The end cover 14 can be quickly placed at both ends of the outer mold 1 through the two side positioning blocks 13 for convenient and quick positioning. Inside the end cover 14, an outer positioning groove 15 is opened. The outer circumference of the outer mold 1 is slidably connected inside the outer positioning groove 15. The front and back sides of the top plate 5 are slidably connected inside the outer positioning groove 15. Inside the end cover 14, an inner positioning groove 16 is opened. The outer circumference of the inner mold 11 is slidably connected inside the inner positioning groove 16. By adjusting the position of the end cover 14, the inner mold 11 and the outer mold 1 can slide into the inner positioning groove 16 and the outer positioning groove 15 to position the end cover 14 and improve the sealing performance.

[0031] Working principle: When it is desired to conveniently fix the inner mold 11, first fix the inner mold 11 and the outer mold 1 on the external support frame. Then insert the connecting sleeve 6 inside the inner mold 11. Both ends of the connecting sleeve 6 protrude from the mold surface. Then insert the double-headed threaded column 8 inward. Sleeve the cushion blocks 9 on the outer periphery of both ends of the connecting sleeve 6. The inner side of the cushion blocks 9 can be cut into a slope similar to the contact surface. Then screw the threaded cover 10 on the outer periphery of the double-headed threaded column 8. The inner side of the threaded cover 10 presses the cushion blocks 9, causing the cushion blocks 9 to deform and be tightly connected to the mold surface, thereby fixing the double-headed threaded column 8. When pouring, the concrete enters the inside of the outer mold 1. Due to the positioning of the double-headed threaded column 8, the position of the inner mold 11 will not shift during the concrete pouring. Even if the connecting sleeve 6 breaks, the sealing sleeve 7 can ensure that the double-headed threaded column 8 will not adhere to the concrete. After pulling out the double-headed threaded column 8, it is convenient to demold the inner mold 11 and the outer mold 1. When it is necessary to close both ends of the mold, first lift the end cover 14, place the positioning block 13 on the slide rail 12, and then move the end cover 14 left and right to ensure that the outer positioning groove 15 and the inner positioning groove 16 can be aligned with the inner mold 11 and the outer mold 1. Push the end cover 14 inward to complete the docking of the end cover 14 and ensure the sealing performance.

[0032] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mold for a combined small-radius single-box double-chamber steel box girder, comprising an outer mold (1), characterized in that: On both the left and right sides of the outer mold (1), there are fixed connection support plates (2). At the bottom of the support plates (2), there are fixedly connected several groups of support columns (3). On the inner wall of the side surface of the outer mold (1), there is fixedly connected a capping component which is used for sealing the top of the outer mold (1). Inside the outer mold (1), there is a sliding connection with a connecting sleeve (6). Inside the connecting sleeve (6), there is fixedly connected a sealing sleeve (7). Inside the sealing sleeve (7), there is a sliding connection with a double-headed threaded column (8). The outer circumference of the double-headed threaded column (8) is threadedly connected with a threaded cover (10). Inside the threaded cover (10), there is a contact with a cushion block (9). The outer circumference of the connecting sleeve (6) has a sliding connection with an inner mold (11).

2. The mold for a combined small-radius single-box double-chamber steel box girder according to claim 1, characterized in that: On both the front and back sides of the support plate (2), there are fixedly connected slide rails (12). Inside the slide rails (12), there is a sliding connection with a positioning block (13). Inside the positioning block (13), there is fixedly connected an end cover (14). Inside the end cover (14), there is an outer positioning groove (15) opened, and inside the end cover (14), there is an inner positioning groove (16) opened.

3. The mold for a combined small-radius single-box double-chamber steel box girder according to claim 1, characterized in that: The capping component includes a baffle (4). The outside of the baffle (4) is fixedly connected inside the outer mold (1). The top of the baffle (4) is fixedly connected with a top plate (5).

4. The mold for a combined small-radius single-box double-chamber steel box girder according to claim 1, characterized in that: There are two groups of the cushion blocks (9). The two groups of the cushion blocks (9) are symmetrically arranged on the outer circumference at both ends of the connecting sleeve (6). The inside of the cushion blocks (9) has a sliding connection with the outer circumference of the connecting sleeve (6).

5. The mold for a combined small-radius single-box double-chamber steel box girder according to claim 1, characterized in that: The outside of the inner cushion block (9) is in contact with the inner wall of the inner mold (11), and the outside of the outer cushion block (9) is in contact with the outer wall of the outer mold (1).

6. The mold for a combined small-radius single-box double-chamber steel box girder according to claim 3, characterized in that: The outer circumference of the outer mold (1) has a sliding connection inside the outer positioning groove (15), and the front and back sides of the top plate (5) have a sliding connection inside the outer positioning groove (15).

7. A mold for a combined small-radius single-box double-chamber steel box girder according to claim 2, characterized in that: The outer circumference of the inner mold (11) has a sliding connection inside the inner positioning groove (16).

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