Round template made of PVC (polyvinyl chloride) plate

Abstract

The utility model relates to a circular template made of PVC (polyvinyl chloride) plates, which comprises two semicircular templates, each semicircular template comprises two arc-shaped shaping plates, the inner diameter of each arc-shaped shaping plate is the specified radius size of a cylindrical template, a plurality of back arris frameworks are fixed between the two arc-shaped shaping plates through steel nails, and the two arc-shaped shaping plates are fixedly connected with the back arris frameworks through steel nails. The back arris framework is perpendicular to the arc shaping plate, the inner side edge of the section of the back arris framework is tangent to the inner arc line of the arc shaping plate, the radian of the PVC panel is the same as that of the inner arc of the arc shaping plate, and the PVC panel is fixed to the inner side of the back arris framework through steel nails. The device is wide in application range, safe in construction, reliable in quality, simple in process and convenient to operate; the manufactured arc template is good in integrity and can be turned over for multiple times; the small templates can be manually mounted without being mechanically hoisted; the reinforcing mode is improved, a large number of turnover materials such as steel pipes and fasteners can be saved, and a good economic effect can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of circular structure formwork technology, and in particular to a circular formwork made of PVC board. Background Technology

[0002] In building construction, for circular and curved reinforced concrete structures, the traditional formwork method involves using sheet metal to create a mold based on the shape of the structure. This mold-making process is labor-intensive and extremely wasteful of materials. If steel formwork is used, the curved surface and ribs of the circular formwork must be custom-made according to the structural requirements of the building. Once a set of steel circular formwork ribs and its curved surface is manufactured, it can only be used for circular curved surfaces of the same curvature, and cannot be universally applicable to different situations and structures. This type of steel formwork is difficult to manufacture, heavy, and has a limited number of reuses. Utility Model Content

[0003] The present invention aims to address the shortcomings of the prior art by providing a circular template made of PVC board.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a circular template made of PVC board, comprising two semi-circular templates, each semi-circular template comprising: two arc-shaped shaping plates, several back rib skeletons, and a PVC panel. The inner diameter of the arc-shaped shaping plates is the specified radius of the cylindrical template. Several back rib skeletons are fixed between the two arc-shaped shaping plates by steel nails. The back rib skeletons are arranged perpendicularly to the arc-shaped shaping plates. The inner side of the cross-section of the back rib skeleton is tangent to the inner arc of the arc-shaped shaping plate. The length of the PVC panel is the sum of the length of the back rib skeleton and the thickness of the two arc-shaped shaping plates. The curvature of the PVC panel is the same as the inner arc curvature of the arc-shaped shaping plate. The PVC panel is fixed to the inner side of the back rib skeleton by steel nails.

[0005] Furthermore, the reinforcing ribs have inner and outer curvatures consistent with those of the arc-shaped plate. The reinforcing ribs are arranged parallel to the arc-shaped plate and are positioned between adjacent back rib frames. The two ends of the reinforcing ribs are fixedly connected to the adjacent back rib frames by steel nails. The inner side of the reinforcing ribs is bonded to the PVC panel. Multiple rows of reinforcing ribs are arranged at equal intervals from the top to the bottom of the back rib frame.

[0006] Furthermore, the two semi-circular templates are bound together by reinforcing galvanized steel straps, which are horizontally bound above and below the positions of each row of reinforcing ribs.

[0007] Furthermore, the two semi-circular templates are reinforced with a grid frame.

[0008] Furthermore, there are no fewer than five fixing points between the PVC panel and each of the back ribs, and the fixing points are located on the center line of the back ribs.

[0009] The beneficial effects of this utility model are: it has a wide range of applications, reliable construction safety and quality, simple process, and convenient operation; the arc template produced has good integrity and can be reused multiple times; small templates do not require mechanical lifting and can be installed manually; the improved reinforcement method can save a lot of steel pipes, fasteners and other reusable materials, and can achieve better economic results. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 This is a front view of the present invention;

[0012] Figure 3 This is a top view of the present invention;

[0013] Figure 4 Top view of the reinforcing rib;

[0014] In the diagram: 1-Arc-shaped shaping plate; 2-Back rib frame; 3-PVC panel; 4-Reinforcing rib;

[0015] The accompanying drawings in this utility model are all schematic diagrams and their sizes do not represent actual dimensions.

[0016] The following will describe in detail the embodiments of this utility model with reference to the accompanying drawings. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] like Figures 1-4As shown, a circular template made of PVC board includes two semi-circular templates. Each semi-circular template includes two arc-shaped shaping plates 1, several back ribs 2, and a PVC panel 3. The inner diameter of the arc-shaped shaping plate 1 is the specified radius of the cylindrical template. Several back ribs 2 are fixed between the two arc-shaped shaping plates 1 by steel nails. The back ribs 2 are perpendicular to the arc-shaped shaping plates 1. The inner side of the cross-section of the back ribs 2 is tangent to the inner arc of the arc-shaped shaping plate 1. The length of the PVC panel 3 is the sum of the length of the back ribs 2 and the thickness of the two arc-shaped shaping plates 1. The curvature of the PVC panel 3 is the same as the inner arc curvature of the arc-shaped shaping plate 1. The PVC panel 3 is fixed to the inner side of the back ribs 2 by steel nails. The back frame 2 is made of square timber, and the method of forming the frame with the arc-shaped template 1 and the square timber is used. The inner lining of the frame is made of PVC panel 3. By utilizing the overall rigidity of the template, the quality standards and process requirements of the circular concrete structure construction are achieved, while overcoming the defects of steel templates being heavy and complicated to manufacture.

[0019] It also includes: reinforcing ribs 4, the inner and outer curvatures of which are consistent with the inner and outer curvatures of the arc-shaped plate 1, the reinforcing ribs 4 being arranged parallel to the arc-shaped plate 1, the reinforcing ribs 4 being arranged between adjacent back rib frames 2, the two ends of the reinforcing ribs 4 being fixedly connected to the adjacent back rib frames 2 by steel nails, the inner side of the reinforcing ribs 4 being bonded to the PVC panel 3, and multiple rows of reinforcing ribs 4 being arranged at equal intervals from the top to the bottom of the back rib frames 2.

[0020] The two semi-circular templates are bound together with reinforcing galvanized steel straps, which are horizontally bound above and below each row of reinforcing ribs 4. The tension of each reinforcing galvanized steel strap must be consistent to ensure uniform stress distribution. The fastening nuts on each reinforcing galvanized steel strap should be staggered, not concentrated on a single vertical line, to ensure more even stress distribution on the template.

[0021] The two semi-circular templates are reinforced with a grid frame to ensure the overall stability and sturdiness of the templates.

[0022] There are no fewer than five fixing points between the PVC panel 3 and each of the back ribs 2, and these fixing points are located on the center line of the back ribs 2. This is to ensure a tight connection between the PVC panel 3 and the back ribs 2 and to maintain operability.

[0023] The manufacturing steps of this utility model are as follows:

[0024] 1. Taking the production of a circular template with a diameter of 980mm as an example, designate a point on the ground as the center of the arc. Using a marker, draw an arc with a radius of 492mm and an angle of 180°, at a 1:1 scale. Place a complete template (1830mm × 915mm × 12mm) on the arc, keeping the center unchanged. Draw an arc on the board with a radius of 492mm using a marker. Repeat this process, drawing arcs with radii of 492mm + n90mm (n = 1, 2, 3...) until the entire sheet of plywood is completed. Then, use a curve cutter to cut the plywood along the drawn arcs as needed, thus forming the circular arc shaping board 1. Produce a sufficient number of circular arc shaping boards 1 using this method.

[0025] 2. Construct a semi-circular template frame. Use 60mm×80mm square timber as the back rib frame 2. Cut the square timber to the required length. The number of back rib frames 2 is calculated by dividing the semi-circular length of the template by 150mm-200mm and rounding down. Set 60mm×80mm square timber segments as reinforcing ribs 4 between adjacent back rib frames 2. The length of the reinforcing ribs 4 is consistent with the spacing between adjacent back rib frames 2. Nail the reinforcing ribs 4 to the back rib frames 2. The surface that is in contact with the PVC panel 3 and the outer surface are all rounded. The curvature is consistent with the curvature of the arc-shaped shaping plate 1. The reinforcing ribs 4 start from the arc-shaped shaping plates 1 on both sides and are reinforced between the back rib frames 2 at 400mm intervals. If the length cannot meet the requirement of evenly dividing 400mm, take a value close to the average. Then combine the arc-shaped shaping plate 1 and the back rib frame 2. Fix the arc-shaped shaping plate 1 to both ends of the back rib frame 2 with steel nails. The inner side of the cross section of the back rib frame 2 is tangent to the inner arc line of the arc-shaped shaping plate 1.

[0026] 3. After the semi-circular template frame is made, place the frame on the ground with the inner arc facing upward. Bend the PVC panel 3 into an arc and nail it to the inside of the back frame 2. The thickness of the PVC panel 3 is 1.5-2mm. Fix the PVC panel 3 along the length direction starting from one end of the back frame 2.

[0027] 4. Use reinforced galvanized steel strips to tie the reinforcing ribs at position 4 outside the semi-circular formwork frame and then use a grid frame to reinforce the entire circular formwork.

[0028] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or direct application to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A circular template made of PVC board, characterized in that, The system includes two semi-circular templates, each comprising: two arc-shaped plates (1), several back ribs (2), and a PVC panel (3). The inner diameter of the arc-shaped plate (1) is the specified radius of the cylindrical template. Several back ribs (2) are fixed between the two arc-shaped plates (1) by steel nails. The back ribs (2) are perpendicular to the arc-shaped plates (1). The inner side of the cross section of the back ribs (2) is tangent to the inner arc of the arc-shaped plate (1). The length of the PVC panel (3) is the sum of the length of the back ribs (2) and the thickness of the two arc-shaped plates (1). The curvature of the PVC panel (3) is the same as the inner arc curvature of the arc-shaped plate (1). The PVC panel (3) is fixed to the inner side of the back ribs (2) by steel nails.

2. A circular template made of PVC board according to claim 1, characterized in that, Also includes: Reinforcing rib (4), the inner and outer curvature of the reinforcing rib (4) is consistent with the inner and outer curvature of the arc shaping plate (1), the reinforcing rib (4) is arranged parallel to the arc shaping plate (1), the reinforcing rib (4) is arranged between adjacent back rib frames (2), the two ends of the reinforcing rib (4) are fixedly connected to the adjacent back rib frames (2) by steel nails, the inner side of the reinforcing rib (4) is bonded to the PVC panel (3), and multiple rows of reinforcing ribs (4) are arranged at equal intervals from the top of the back rib frame (2) to the bottom of the back rib frame (2).

3. A circular template made of PVC board according to claim 2, characterized in that, The two semi-circular templates are bound together by reinforcing galvanized steel strips, which are horizontally bound above and below the position of each row of reinforcing ribs (4).

4. A circular template made of PVC board according to claim 3, characterized in that, The two semi-circular templates are reinforced with a grid frame.

5. A circular template made of PVC board according to claim 4, characterized in that, There are no fewer than five fixing points between the PVC panel (3) and each of the back ribs (2), and the fixing points are located on the center line of the back ribs (2).

Images