Variable-diameter arc inner die

Abstract

The utility model discloses a variable-diameter arc inner die. The variable-diameter arc inner mold comprises an adjusting formwork unit and a foundation formwork unit, the adjusting formwork unit is provided with an adjusting formwork mechanism used for retaining concrete and a sliding truss used for being connected with an inserting-connecting formwork, and the foundation formwork unit is provided with a foundation formwork used for retaining concrete and a foundation framework used for increasing the strength of the foundation formwork. The foundation formworks are installed on the foundation frameworks, the sliding trusses are arranged on the foundation frameworks of the adjacent foundation formwork units in a sliding mode, the positions, relative to the foundation frameworks, of the sliding trusses are locked through the locking devices, and the two ends of the formwork adjusting mechanisms are connected with the adjacent foundation formworks or overlapped on the adjacent foundation formworks. And at least one basic template adjacent to the inserting template is connected with a bending degree adjusting mechanism. The variable-diameter arc inner mold adapts to a variable-cross-section building in a contraction and division mode, meanwhile, the foundation template unit and the adjusting template unit are repeatedly utilized, a large amount of materials are saved, and cost is low.

Description

Technical Field

[0001] This utility model relates to the field of internal mold technology, and in particular to a variable diameter circular arc internal mold. Background Technology

[0002] In traditional variable cross-section concrete cylindrical column internal formwork construction, the cross-section and curvature of the pier column change with the height. Current construction methods involve multiple pours, each forming a separate pouring layer. Each pouring layer requires a separate formwork, meaning the formwork used in the previous pour is unsuitable for the next and cannot be reused. Furthermore, this method requires formwork to be made according to the height of the main structure being poured; the total height of the formwork for all pouring layers is equal to the height of the main structure. All formwork is disposable, consuming a large amount of materials and lacking versatility, resulting in significant waste and high costs. Additionally, each time formwork needs to be replaced, it must be dismantled and transported to the ground, and then the formwork for the next pouring must be transported from the ground to the pouring location for installation. The transported materials are heavy, and during transport, they are moved in parts, resulting in a large quantity of materials being transported and a long transport time, extending the construction period. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a variable diameter circular arc inner mold that can be tapered to adapt to concrete with variable cross-section.

[0004] To address the aforementioned problems, this utility model provides a variable-diameter circular arc inner mold. The variable-diameter circular arc inner mold includes an adjusting template unit and a base template unit. The adjusting template unit has an adjusting template mechanism for retaining concrete and a sliding truss for connecting the insert template. The base template unit has a base template for retaining concrete and a base frame for increasing the strength of the base template. The base template is installed on the base frame. The sliding truss is slidably disposed on the base frame of the adjacent base template unit. The relative position of the sliding truss to the base frame is locked by a locking device. The two ends of the adjusting template mechanism are connected to or overlap with the adjacent base templates. At least one base template adjacent to the insert template is connected to a curvature adjusting mechanism for adjusting the curvature.

[0005] Furthermore, the locking device is a pin, and both ends of the sliding truss are provided with first locking holes for installing the locking device. The basic frame is provided with multiple second locking holes distributed along its length and cooperating with the first locking holes. The locking device is installed in the first and second locking holes, and the locking device is inserted at the overlapping position of the first and second locking holes.

[0006] Furthermore, each end of the sliding truss is provided with two first locking holes arranged side by side, the second locking holes are arranged in two rows, and the two rows of second locking holes are staggered along the length direction of the foundation frame, and the locking device is wedge-shaped.

[0007] Furthermore, the adjusting template mechanism includes a filler template and a support rod for retaining concrete. Both ends of the filler template are connected to the adjacent foundation template. The first end of the support rod abuts against the filler template. The sliding truss has a first insertion hole for installing the support rod corresponding to the filler template. The second end of the support rod is inserted into the first insertion hole. The second end of the support rod is detachably installed with a limiting member. The limiting member abuts against the sliding truss to limit the length of the support rod inserted into the sliding truss.

[0008] Alternatively, it includes an insert template and a strut for retaining concrete, wherein both ends of the insert template are connected to or overlap with adjacent foundation templates, a first end of the strut abuts against the insert template, and the sliding truss has a second insertion hole for installing a strut corresponding to the insert template, the second end of the strut is inserted into the second insertion hole, and a limiting member is detachably installed on the second end of the strut, the limiting member abutting against the sliding truss to limit the length of the strut inserted into the sliding truss;

[0009] Alternatively, the adjusting template mechanism includes a filler template and a splice template for retaining concrete, a tapering frame for increasing the strength of the filler template, and a strut for limiting the position of the filler template and the splice template. The filler template is installed on the tapering frame, and the first end of at least one strut abuts against the tapering frame. The first end of at least one strut abuts against the splice template. The sliding truss has a first insertion hole for installing a strut corresponding to the filler template and a second insertion hole for installing a strut corresponding to the splice template. The strut corresponding to the filler template is inserted into the first insertion hole, and the strut corresponding to the splice template is inserted into the second insertion hole. The second end of each strut is detachably fitted with a limiting member, which abuts against the sliding truss to limit the length of the strut inserted into the sliding truss.

[0010] Furthermore, the sliding truss includes two crossbeams, a connecting plate connecting the two crossbeams into one piece, and a plug plate for installing struts. The two crossbeams are arranged vertically at intervals, and the plug plate is provided on the crossbeams. The interval between the two ends of the two crossbeams forms a sliding groove. The plug plate is provided with a first plug hole and a second plug hole, or there are two plug plates, one of which is provided with a first plug hole and the other is provided with a second plug hole.

[0011] Furthermore, both the missing template and the plug-in template are provided with support seats, and the first end of the support rod abuts against the support seat.

[0012] Furthermore, the limiting member is a pin, and the support rod is provided with a plurality of limiting holes distributed along its length direction, and the limiting member is inserted into the limiting holes.

[0013] Furthermore, the limiting holes are divided into two rows, and the two rows of limiting holes are staggered along the length direction of the support rod, and the limiting member is wedge-shaped.

[0014] Furthermore, the filling template is connected to a curvature adjustment mechanism for adjusting the curvature.

[0015] Furthermore, the curvature adjustment mechanism includes an outward expansion adjustment component for reducing curvature and an inward contraction adjustment component for increasing curvature. The inward contraction adjustment component is disposed on the corresponding base template or filler template. One end of the outward expansion adjustment component is used to abut or pivotally connect with the corresponding base template or filler template, and the other end of the outward expansion adjustment component is detachably connected to the tapering skeleton.

[0016] Furthermore, the outward expansion adjustment assembly includes an adjustment rod, an adjustment component, and an adjustment seat. The adjustment seat is installed on the corresponding base template or filler template. One end of the adjustment rod abuts against or is pivotally connected to the adjustment seat, and the other end of the adjustment rod passes through the corresponding tapering frame or base frame. The adjustment component is detachably connected to the other end of the adjustment rod and abuts against the corresponding tapering frame or base frame to prevent the adjustment rod from falling off. The inward contraction adjustment assembly includes an adjustment steel strip, an adjustment screw, an adjustment nut, and a positioning plate. The adjustment steel strip is fixed to the corresponding base template or filler template. One end of the adjustment screw is fixed to the adjustment steel strip, and the other end of the adjustment screw passes through the positioning plate and is screwed to the adjustment nut. The adjustment nut abuts against the positioning plate to prevent the adjustment screw from falling off. The positioning plate is fixed to the corresponding filler template or base template.

[0017] Furthermore, the curvature adjustment mechanism includes an adjustment rod, an adjustment component, and an adjustment seat. The adjustment seat is installed on the corresponding base template or filler template. One end of the adjustment rod is pivotally connected to the adjustment seat, and the other end of the adjustment rod passes through the corresponding tapering frame or base frame. There are two adjustment components, which are detachably connected to the other end of the adjustment rod and located on both sides of the corresponding tapering frame or base frame. Each adjustment component abuts against the corresponding tapering frame.

[0018] Furthermore, the adjusting element is a pin, and the adjusting rod is provided with a plurality of adjusting holes along the length direction of the adjusting rod, and the adjusting element is inserted into the adjusting holes.

[0019] Furthermore, the adjustment holes are divided into two rows, and the two rows of adjustment holes are staggered along the length of the adjustment rod, and the adjustment element is wedge-shaped.

[0020] This utility model of a variable diameter arc inner mold detachably connects the adjusting template unit and the basic template unit together, facilitating tapering and diameter adjustment. The curvature adjustment mechanism adjusts the curvature of the corresponding basic template, while changing the overlap range between the insert template and the basic template, thereby changing the overall length of the basic template and the insert template to complete the tapering. This allows it to adapt to different cross-section sizes, and the basic template unit and the insert template can be reused, resulting in low material consumption and low cost. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a preferred embodiment of the variable diameter circular arc inner mold of this utility model.

[0022] Figure 2 This is an exploded view of the variable-diameter circular arc inner mold of this utility model.

[0023] Figure 3 This is a schematic diagram of the connection structure between the sliding truss and the foundation frame.

[0024] Figure 4 This is a schematic diagram of the structure of the adjustment template unit.

[0025] Figure 5 This is a schematic diagram of the receiving skeleton.

[0026] Figure 6 This is a schematic diagram of the support base.

[0027] Figure 7 This is a schematic diagram of the structure of the strut and the support base.

[0028] Figure 8 This is a schematic diagram of a structure in which a limiting component is installed on a support rod.

[0029] Figure 9 This is a structural diagram of the basic template.

[0030] Figure 10 This is a structural diagram of another implementation of the basic template.

[0031] Figure 11 This is a schematic diagram of the curvature adjustment mechanism.

[0032] Figure 12 This is a schematic diagram of the structure where the adjusting element is located on the adjusting rod.

[0033] Figure 13 This is a schematic diagram of the adjustment seat.

[0034] Figure 14 This is a comparison diagram showing how the sections are folded down using a moving sliding truss.

[0035] Figure 15This is a comparison chart showing the reduction in thickness achieved by changing different sliding trusses and filler templates.

[0036] Figure 16 This is a structural diagram of the plug-in template without the missing template.

[0037] Figure 17 This is a schematic diagram of another embodiment of the curvature adjustment mechanism.

[0038] The meanings of the labels in the attached diagram are as follows:

[0039] Adjustable template unit A, missing template 1, plug-in template 2, tapering frame 3, receiving hole 30, tapering connecting rod 31, tapering connecting frame 32, main connector 321, secondary connector 322, support base 4, abutment groove 40, first support plate 41, second support plate 42, third support plate 43, strut 51, limiting hole 511, plug 512, limiting component 52, sliding truss 6, crossbeam 61, first locking hole 611, connecting plate 62, plug-in plate 63, first insertion hole 631, second insertion hole 632, locking device 7, curvature adjustment Mechanism 8, outward expansion adjustment component 81, adjustment rod 811, adjustment hole 8111, adapter plate 8112, adjustment component 812, adjustment seat 813, adjustment groove 8130, first seat plate 8131, second seat plate 8132, third seat plate 8133, inward retraction adjustment component 82, adjustment steel strip 821, adjustment screw 822, adjustment nut 823, positioning plate 824, basic template unit B, basic template 91, first basic template 91c, second basic template 91d, basic frame 92, second lock hole 921, baffle 93. Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings.

[0041] Example 1

[0042] In this embodiment, the outer side refers to the side closest to the concrete, and the side opposite the outer side is the inner side. This embodiment uses a building with a bottom-to-top structure as an example for illustration. Therefore, the curved edge has a smaller curvature at the bottom and a larger curvature at the top. Hence, the curvature adjustment is from small to large. It should be noted that the variable diameter arc inner mold of this utility model is also applicable to waist-shaped buildings.

[0043] like Figures 1 to 3As shown, a preferred embodiment of the variable-diameter circular arc inner mold of this utility model includes four basic template units B and four adjusting template units A for forming the edges of the inner cavity. The four basic template units B are reusable and are arranged in a rectangular pattern, connected to each other by adjusting template units A. Both the basic template units B and the adjusting template units A are equipped with a curvature adjustment mechanism 8, allowing both to adjust their curvature. The adjusting template unit A can also adjust its length, which refers to its length viewed from above, i.e., the arc length of the adjusting template unit A. The adjusting template unit A is detachably connected to the basic template units B, facilitating adjustment of their relative positions when the connection is severed. In this embodiment, the building cavity is elongated, meaning it has two straight edges and an arc-shaped edge, with the two straight edges connected by the two arc-shaped edges. Of course, in other embodiments, the building cavity can also be circular or other shapes with arc-shaped edges.

[0044] The adjustable template unit A has a sliding truss 6, and the basic template unit B has a basic frame 92. The sliding truss 6 has grooves at both ends, allowing it to slide smoothly onto the basic frame 92. The sliding truss 6 is locked in its relative position to the basic frame 92 by a locking device 7. When the locking device 7 is unlocked, the sliding truss 6 can move on the basic frame 92. When the locking device 7 is locked, the sliding truss 6 and the basic frame 92 are connected to form a whole, thus connecting the basic template unit B and the adjustable template unit A to form an integral frame, i.e., the inner mold.

[0045] The locking device 7 is a pin. The sliding truss 6 is provided with a first locking hole 611 for installing the locking device 7. The base frame 92 is provided with a second locking hole 921 that mates with the first locking hole 611. The locking device 7 is installed in the first locking hole 611 and the second locking hole 921, thereby connecting the sliding truss 6 to the base frame 92. The use of a pin structure for insertion into the corresponding first locking hole 611 and second locking hole 921 facilitates installation. The basic frame 92 is provided with two rows of second locking holes 921, with multiple second locking holes 921 in each row. The second locking holes 921 in the two rows are staggered, meaning that the two ends of any second locking hole 921 overlap with the projection portion of two adjacent second locking holes 921 in the width direction of the other row. The locking device 7 is inserted at the overlapping position of the first locking hole 611 and the second locking hole 921. Each end of the sliding truss 6 is provided with two first locking holes 611. By using two first locking holes 611 and two rows of staggered second locking holes 921, it can be ensured that there is always a first locking hole 611 corresponding to a second locking hole 921 when the sliding truss 6 moves, which increases the smoothness of adjustment, enables stepless adjustment, and enhances versatility. The locking device 7 is wedge-shaped, so that the locking device 7 can adapt to the overlap of first locking holes 611 and second locking holes 921 of different sizes.

[0046] Combination Figure 4Referring to the reference, the adjusting template unit A includes an adjusting template mechanism and a sliding truss 6. The adjusting template mechanism includes a gap-filling template 1, an insert template 2, a tapering frame 3, a support base 4, and struts 51. The gap-filling template 1 unit is also connected to the base template 91. The gap-filling template 1 is arc-shaped and is installed on the tapering frame 3, which is located inside the gap-filling template 1. The tapering frame 3 abuts against the first end of the strut 51. The tapering frame 3 is connected to multiple struts 51, which are arranged sequentially along the height direction. The curvature adjustment mechanism 8 is provided on the gap-filling template 1 and is used to adjust the curvature of the gap-filling template 1. Both ends of the gap-filling template 1 are correspondingly provided with curvature adjustment mechanisms 8. The number of curvature adjustment mechanisms 8 is set according to requirements and is also arranged sequentially along the height direction. The insertion template 2 is arc-shaped, with its left and right sides abutting against the outer walls of the supplementary template 1 and the base template 91, respectively. That is, the left and right sides of the insertion template 2 partially overlap with the supplementary template 1 and the base template 91. The more the insertion template 2 overlaps with the supplementary template 1 and the base template 91, the shorter the arc length of the adjusting template unit A; the less overlap, the longer the arc length of the adjusting template unit A. The inner cavity wall does not require high smoothness; therefore, small steps are present at the overlap points of the insertion template 2 with the base template 91 and the supplementary template 1, which will not affect actual use and is permissible. The outer side of the insertion template 2 is constrained by a reinforced concrete skeleton. Multiple support seats 4 are provided on the insertion template 2, arranged sequentially along the height direction. Each support seat 4 abuts against the first end of a support rod 51. Each strut 51 has its second end inserted into the sliding truss 6. A limiting member 52 is inserted into the second end of each strut 51, which abuts against the sliding truss 6 to limit the length of the strut 51 inserted into the sliding truss 6. This limits the distance between the filling template 1 and the insertion template 2 and the sliding truss 6. When the distance needs to be adjusted, the limiting member 52 can be removed and the strut 51 moved. Different distances between the filling template 1 and the insertion template 2 and the sliding truss 6 can accommodate different sizes of internal cavities. Both ends of the sliding truss 6 are provided with sliding grooves that cooperate with the base frame 92. When the sliding truss 6 is in the unlocked state from the base frame 92, the sliding truss 6 can slide on the base frame 92 to adjust its position.

[0047] In another embodiment, the adjustment template unit A may not need to be equipped with the curvature adjustment mechanism 8, that is, it only retains the function of adjusting the arc length. The supplementary template 1 is connected to the basic template unit B, which can ensure that the bending degree of the plug-in template 2 can be limited by the basic template 91 and the completed steel bars. Since the inner formwork does not have high requirements for bending degree, the bending degree of the plug-in template 2 can also be adjusted in this way.

[0048] In another embodiment, the support rod 51 can also be connected to the filling template 1 by means of hinge.

[0049] The sliding truss 6 has two first insertion holes 631 and a second insertion hole 632 for installing support rods 51. The support rods 51 are inserted into the first insertion holes 631 and the second insertion holes 632. The two first insertion holes 631 are used to install the support rods 51 corresponding to the missing template 1, and the second insertion holes 632 are used to install the support rods 51 corresponding to the plug template 2. The first locking holes 611 are located at the left and right ends of the sliding truss 6. The sliding truss 6 includes two crossbeams 61, a connecting plate 62 connecting the two crossbeams 61 into one unit, and a plug-in plate 63. The first locking hole 611 is provided at both ends of the crossbeams 61. The upper and lower ends of the plug-in plate 63 are fixed to the two crossbeams 61. The two crossbeams 61 are spaced apart vertically, so that there is a gap between the two crossbeams 61, which facilitates the installation of the plug-in plate 63 between the two crossbeams 61. Placing the plug-in plate 63 between the two crossbeams 61 can also increase the strength of the two crossbeams 61. The gap between the two ends of the two crossbeams 61 forms a sliding groove, and the basic frame 92 is located in the sliding groove. In another embodiment, the plug-in plate 63 can also be provided on only one of the crossbeams 61, or a plug-in plate 63 can be provided with a first plug-in hole 631 and a second plug-in hole 632. There are two plug-in plates 63. One plug-in plate 63 has two first plug holes 631, and one of the support rods 51 corresponding to the missing template 1 is inserted into the first plug hole 631. The other plug-in plate 63 has a second plug hole 632, which is used to insert the support rod 51 corresponding to the plug-in template 2. Since the crossbeam 61 needs to cooperate with the support rods 51 corresponding to the missing template 1 and the plug-in template 2, the plug-in plate 63 cannot be installed at the center position of the crossbeam 61. The support rod 51 needs to be basically aligned with the radial direction of the missing template 1 or the plug-in template 2, so that the support rod 51 is always in a non-perpendicular state to the crossbeam 61. Therefore, after the crossbeam 61 moves in and out multiple times, the distance between the crossbeam 61 and its initial position is too large, and the support rod 51 that cooperates with the missing template 1 needs to be inserted into the other first plug hole 631. The first insertion hole 631 and the second insertion hole 632 have a gap of 2-3mm between them and the support rod 51, which facilitates the adjustment of the direction of the support rod 51 and ensures that the support rod 51 can still be inserted into the mounting hole of the crossbeam 61 after the crossbeam 61 is moved.

[0050] like Figure 5As shown, the tapering frame 3 is provided with an abutment groove 40 and a clearance bevel. The first end of the support rod 51 is inserted into the abutment groove 40. The clearance bevel provides space for adjusting the curvature of the filling template 1, thus preventing interference between the filling template 1 and the tapering frame 3 when the filling template 1 is adjusted inward. Specifically, the tapering frame 3 includes tapering connecting rods 31 and tapering connecting frames 32. Each tapering connecting frame 32 is fixed with a tapering connecting rod 31, and the number of tapering connecting rods 31 can be increased or decreased according to requirements. The tapering connecting rods 31 are connected to the filling template 1. The tapering connecting frame 32 is provided with a support base 4, the abutment groove 40 is provided on the support base 4, and the support rod 51 abuts against the abutment groove 40. The receiving and dividing connecting frame 32 includes two main connecting parts 321 arranged vertically and a secondary connecting part 322 connecting the two main connecting parts 321 into one unit. This allows the support base 4 to be installed in the gap between the two main connecting parts 321, increasing the strength of the receiving and dividing connecting frame 32 and preventing the inclined edge from being located on the main connecting parts 321. To reduce costs, the main connecting parts 321 are typically made of channel steel.

[0051] like Figures 6 to 8 As shown, the support base 4 includes a first support plate 41, a second support plate 42, and a third support plate 43. The first and second support plates 41 and 42 are both fixed to the insertion template 2. The upper and lower ends of the third support plate 43 are respectively fixed to the first and second support plates 41 and 42. The third support plate 43 is curved into an arc shape, forming an arc-shaped abutment groove 40 with the first and second support plates 41 and 42. The support rod 51 is provided with an arc-shaped plug 512 that matches the abutment groove 40. The plug 512 of the support rod 51 is inserted into the abutment groove 40. The arc-shaped abutment groove 40 can accommodate the support rod 51 being inserted from different angles, providing a wide range of adaptability. The support base 4 located on the receiving and connecting frame 32 has its first support plate 41 and second support plate 42 being two channel steels of the receiving and connecting frame 32. It should be understood that an independent support base 4 can also be provided on the receiving and connecting frame 32. In other embodiments, the support base 4 is spherical, and the plug 512 is spherical.

[0052] The limiting member 52 is a pin. The support rod 51 is made of plate steel bent into a U-shape, which can improve the strength of the support rod 51 and facilitate processing. The support rod 51 is provided with limiting holes 511, which are arranged in two rows, with multiple limiting holes 511 in each row. The limiting holes 511 in the two rows are staggered, that is, the two ends of any limiting hole 511 overlap with the projection of two adjacent limiting holes 511 in the width direction of the other row. This allows the limiting member 52 to be inserted into the limiting hole 511 at any length of the support rod 51 inserted into the sliding truss 6, increasing the smoothness of adjustment, enabling stepless adjustment, and improving versatility. In another embodiment, the limiting member 52 can also be a nut, and the support rod 51 has at least one section of external thread, with the nut screwed onto the support rod 51.

[0053] like Figure 9 and Figure 10 As shown, each of the basic template units 9 has a basic template 91 for limiting the edges of the building cavity and a basic frame 92 for increasing the strength of the basic template 91. The basic template 91 is installed on the basic frame 92. The basic frame 92 has a clearance bevel, which provides clearance space when the basic template 91 adjusts its curvature, i.e., avoids interference between the basic template 91 and the basic frame 92 when the basic template 91 is adjusted by inward contraction. At least a portion of the basic template 91 is arc-shaped, that is, a part of the basic template 91 can be arc-shaped or the entire basic template 91 can be arc-shaped. For distinction and understanding, the basic template 91 that is entirely arc-shaped is defined as the first basic template 91c, and the basic template 91 that is only partially arc-shaped is defined as the second basic template 91d. The curvature adjustment mechanism 8 is used to adjust the curvature of the arc segment. In other embodiments, the second basic template 91d can also be straight, and the corresponding second basic template 91d does not need to be equipped with the curvature adjustment mechanism 8. An arc segment is provided on the base template 91 of the second base template 91d, which allows the curvature of the supplementary template 1 to be changed even when the first adjusting template unit A does not have a curvature adjustment function. The base template unit B can be a whole or a whole formed by connecting two or more parts. Generally speaking, it is only used to form a whole by connecting two or more parts when the length is long. In this embodiment, the base template unit B with the second base template 91d is a whole formed by connecting two parts.

[0054] like Figure 11As shown, the curvature adjustment mechanism 8 includes an outward expansion adjustment component 81 for reducing curvature and an inward contraction adjustment component 82 for increasing curvature. The outward expansion adjustment component 81 includes an adjustment rod 811, an adjustment element 812, and an adjustment seat 813. The adjustment seat 813 is installed on the corresponding filling template 1 or base template 91. That is, when the outward expansion adjustment component 81 is used to adjust the curvature of the filling template 1, the adjustment seat 813 is installed on the filling template 1; when the outward expansion adjustment component 81 is used to adjust the curvature of the base template 91, the adjustment seat 813 is installed on the base template 91. The first end of the adjusting rod 811 abuts against the adjusting seat 813. Both the tapering frame 3 and the base frame 92 have receiving holes 30. The second end of the adjusting rod 811 is inserted into the receiving hole 30 on the corresponding tapering frame 3 or base frame 92. The adjusting member 812 is detachably connected to the second end of the adjusting rod 811. That is, when the outward expansion adjusting component 81 is used to adjust the curvature of the filling template 1, the second end of the adjusting rod 811 is inserted into the tapering frame 3; when the outward expansion adjusting component 81 is used to adjust the curvature of the base template 91, the second end of the adjusting rod 811 is inserted into the base frame 92. The adjusting member 812 abuts against the corresponding tapering frame 3 or base frame 92. The adjusting element 812 is a pin, and the adjusting rod 811 has multiple adjusting holes 8111. The adjusting element 812 is inserted into the adjusting holes 8111 on the adjusting rod 811, so that the adjusting element 812 abuts against the receiving frame 3 to limit the length of the adjusting rod 811 inserted into the receiving frame 3. In other words, the outward expansion adjusting component 81 can adjust the distance of the filling template 1 and the base template 91 pushing outward. In other embodiments, the adjusting element 812 can also be a nut, and the adjusting rod 811 has external threads, with the nut screwed onto the adjusting rod 811. It should be noted that the adjusting rod 811 can also be pivotally connected to the adjusting seat 813. The inward adjustment component 82 includes an adjusting steel strip 821, an adjusting screw 822, an adjusting nut 823, and a positioning plate 824. The adjusting steel strip 821 and the positioning plate 824 are both fixed to the corresponding replacement template 1 or base template 91. That is, when the inward adjustment component 82 is used to adjust the curvature of the replacement template 1, the adjusting steel strip 821 and the positioning plate 824 are installed on the replacement template 1; when the inward adjustment component 82 is used to adjust the curvature of the base template 91, the adjusting steel strip 821 and the positioning plate 824 are not fixed to the replacement template 1. 24 is installed on the base template 91; the adjusting steel strip 821 and the positioning plate 824 are spaced apart, one end of the adjusting screw 822 is fixed on the adjusting steel strip 821, and the other end of the adjusting screw 822 passes through the positioning plate 824 and is screwed to the adjusting nut 823. Rotating the adjusting nut 823 can move the adjusting screw 822, thereby moving the adjusting steel strip 821 away from or closer to the positioning plate 824. In other words, the inward adjustment component 82 can adjust the distance by which the template 1 and the base template 91 are pulled inward.In this embodiment, when the filling template 1 and the base template 91 are not subjected to external force, the curvature of the filling template 1 and the base template 91 is less than the maximum required curvature and greater than or less than the required curvature, thereby reducing the adjustment range of the curvature of the filling template 1 and the base template 91. When the required curvature of the building structure is less than the initial curvature of the supplementary template 1 and the foundation template 91, the outward expansion adjustment component 81 is adjusted by pulling the adjustment piece 812 out of the adjustment hole 8111 and then adjusting the length of the insertion receiving hole 30. After the adjustment is completed, the adjustment piece 812 is inserted again to complete the adjustment. At this time, the inward contraction adjustment component 82 does not participate in the adjustment, that is, the adjustment nut 823 does not need to be set. If the adjustment nut 823 is set, it should be adjusted synchronously. When the required curvature of the building structure is greater than the initial curvature of the supplementary template 1 and the foundation template 91, the inward contraction adjustment component 82 is adjusted by rotating the nut to make the adjustment screw 822 pull the adjustment steel strip 821. The adjustment steel strip 821 pulls the supplementary template 1 or the foundation template 91 to retract inward until the curvature of the supplementary template 1 or the foundation template 91 is adjusted to the required value. During this process, the outward expansion adjustment component 81 does not participate in the adjustment. The adjustment rod 811 and the adjustment piece 812 can be removed. If the adjustment rod 811 and the adjustment piece 812 are retained, they should be adjusted synchronously.

[0055] Both the receiving frame 3 and the base frame 92 are provided with baffles 93 to limit the left and right swing of the adjusting rod 811. There are two baffles 93. The baffles 93 and the corresponding receiving frame 3 or base frame 92 are combined to form a receiving hole 30. The adjusting rod 811 is inserted into the receiving hole 30. In other words, the two baffles 93 are located on both sides of the adjusting rod 811 to limit the adjustment rod 811. The baffles 93 on the receiving frame 3 are secondary connecting parts 322, which can reduce the number of parts. In other embodiments, a separate plate body can also be provided, and the receiving hole 30 is provided on the plate body.

[0056] like Figure 12As shown, the adjusting rod 811 is made of plate steel bent into a U-shape, which improves the strength of the adjusting rod 811 and facilitates processing. The adjusting holes 8111 on the adjusting rod 811 are arranged in two rows, and the two rows of adjusting holes 8111 are staggered. That is, the two ends of any adjusting hole 8111 overlap with the projection of the two adjacent adjusting holes 8111 in the width direction of the other row. This allows the adjusting rod 811 to be inserted into the sliding truss 6 to any length, and there is always an adjusting hole 8111 that can be inserted by the adjusting component 812, which increases the smoothness of adjustment and can achieve stepless adjustment, making it more versatile. During use, the adjusting holes 8111 may be partially blocked by the sliding truss 6. The unblocked part is defined as the effective hole area. Thus, the size of the effective hole area will change. The adjusting component 812 is set as a wedge shape to accommodate different sizes of effective hole areas. The locking device 7, the adjusting component 812 and the limiting component 52 all use pins to improve the versatility of the components.

[0057] like Figure 13 As shown, the adjusting seat 813 is provided with an adjusting groove 8130, and the first end of the adjusting rod 811 is inserted into the adjusting groove 8130 to ensure that the adjusting rod 811 will not detach from the adjusting seat 813. Specifically, the adjusting seat 813 includes a first seat plate 8131, a second seat plate 8132, and a third seat plate 8133. The first seat plate 8131 and the second seat plate 8132 are both fixed on the insertion template 2. The upper and lower ends of the third seat plate 8133 are respectively fixed on the first seat plate 8131 and the second seat plate 8132. The third seat plate 8133 is curved into an arc shape. The third seat plate 8133, the first seat plate 8131, and the second seat plate 8132 enclose an arc-shaped adjusting groove 8130. The adjusting rod 811 is provided with an adapter plate 8112 that is adapted to the adjusting groove 8130. The adapter plate 8112 of the adjusting rod 811 is inserted into the adjusting groove 8130. The arc-shaped adjusting groove 8130 can accommodate the adjusting rod 811 being inserted from different angles, thus having a wide range of adaptability.

[0058] like Figure 14 and Figure 15 As shown, the tapering and diameter-changing method is as follows:

[0059] First, after the concrete is poured, the formwork is removed. That is, first pull out the locking device 7, then disassemble the adjusting formwork unit A, and move the foundation formwork unit B inward so that it can be moved to the plane position for the next pour.

[0060] Secondly, the basic formwork unit B is moved upward using tools to the height position of the next pour, and the curvature of the basic formwork 91 is adjusted using the curvature adjustment mechanism 8.

[0061] Finally, install and adjust the curvature of the template unit A. During installation, the sliding truss 6 is typically slidably placed on the foundation frame 92 first, then locked using the locking device 7. Next, the supplementary template 1 and its corresponding support rods 51 and limiting devices 52 are installed. Finally, the insert plate and its corresponding support rods 51 and limiting devices 52 are installed. The curvature adjustment is performed using the curvature adjustment mechanism 8 or by replacing different supplementary templates 1, depending on the requirements. As the pier height increases and the cross-section decreases, the initial sliding truss gradually becomes insufficient. At this point, the sliding truss 6 and the supplementary template 1 need to be replaced to adapt to the new cross-section. Figure 16 As shown, after reaching a certain height, the insert template 2, the corresponding support rod 51, and the curvature adjustment mechanism 8 are removed. The adjustment template unit A retains only the sliding truss 6 and the insert template 2 for adjustment. When the pouring height is 4.5m, a single specification of sliding truss 6 can meet the needs of six-story concrete pouring construction.

[0062] The sliding truss 6 can slide freely within the area of ​​the second locking hole 921. Therefore, by replacing trusses of different sizes, the entire inner formwork system can be adapted to any cross-section size through tapering and diameter variation, greatly improving versatility. The use of locking devices 7 ensures a safe and stable structure, while also allowing for easy and quick assembly and disassembly. Demolding is more convenient than with traditional formwork, significantly improving work efficiency. During the entire building pouring process, only the supplementary formwork 1 needs to be replaced after pouring to a certain height. Other components, such as the foundation formwork unit B and the plug-in formwork 2, can be reused, saving a significant amount of material and reducing costs. Furthermore, during tapering adjustment, because the components are reusable, only the reusable parts need to be moved upwards, eliminating the need for hoisting or lowering them from the bottom, saving considerable time and shortening the construction period.

[0063] Example 2

[0064] The difference between this embodiment and Embodiment 1 lies in the structure of the security and curvature adjustment mechanism 8.

[0065] like Figure 17 As shown, the curvature adjustment mechanism 8 includes an adjusting rod 811, adjusting components 812, and an adjusting seat 813. The adjusting seat 813 is installed on the corresponding supplementary template 1 or base template 91. One end of the adjusting rod 811 is pivotally connected to the adjusting seat 813, and the other end of the adjusting rod 811 passes through the corresponding tapering frame 3 or base frame. There are two adjusting components 812, which are detachably connected to the other end of the adjusting rod 811 and located on both sides of the tapering frame 3 or base frame 92. Each adjusting component 812 abuts against the corresponding tapering frame 3 or base frame 92. During adjustment, simply move the adjusting rod 811 and then insert the adjusting component 812 into the corresponding adjusting hole 8111.

[0066] Example 3

[0067] In this embodiment, the adjusting template mechanism includes a missing template 1 and a support rod 51. The connection relationship between the missing template 1 and the support rod 51 is the same as in Embodiment 1. Different cross-sections can be adapted by replacing the missing template 1. In other embodiments, the missing template 1 can be overlapped on an adjacent base template 92; of course, the missing template 1 can also be replaced with an insert template 2, and different cross-sections can also be adapted by replacing the insert template 2.

[0068] Example 4

[0069] This embodiment adapts to different cross-sections by changing the adjusting template mechanism; it can be a complete replacement or a partial replacement.

[0070] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structure made using the contents of this utility model specification and drawings, whether directly or indirectly applied to other related technical fields, shall also be within the patent protection scope of this utility model.

Claims

1. A variable-diameter circular arc inner mold, characterized in that: The system includes an adjustable template unit and a base template unit. The adjustable template unit has an adjustable template mechanism for retaining concrete and a sliding truss for connecting the insert template. The base template unit has a base template for retaining concrete and a base frame for increasing the strength of the base template. The base template is installed on the base frame. The sliding truss is slidably disposed on the base frame of the adjacent base template unit. The relative position of the sliding truss to the base frame is locked by a locking device. The two ends of the adjustable template mechanism are connected to or overlap with the adjacent base templates. At least one base template adjacent to the insert template is connected to a curvature adjustment mechanism for adjusting the curvature.

2. The variable diameter circular arc inner mold as described in claim 1, characterized in that: The locking device is a pin. Both ends of the sliding truss are provided with first locking holes for installing the locking device. The basic frame is provided with multiple second locking holes distributed along its length and cooperating with the first locking holes. The locking device is installed in the first and second locking holes and is inserted at the overlapping position of the first and second locking holes.

3. The variable diameter circular arc inner mold as described in claim 2, characterized in that: Each end of the sliding truss is provided with two first locking holes arranged side by side, the second locking holes are arranged in two rows, and the two rows of second locking holes are staggered along the length of the foundation frame. The locking device is wedge-shaped.

4. The variable diameter circular arc inner mold as described in claim 1, characterized in that: The adjustable template mechanism includes a filler template and a support rod for retaining concrete. Both ends of the filler template are connected to the adjacent foundation template. The first end of the support rod abuts against the filler template. The sliding truss has a first insertion hole for installing the support rod corresponding to the filler template. The second end of the support rod is inserted into the first insertion hole. The second end of the support rod is detachably installed with a limiting member. The limiting member abuts against the sliding truss to limit the length of the support rod inserted into the sliding truss. Alternatively, it includes an insert template and a strut for retaining concrete, wherein both ends of the insert template are connected to or overlap with adjacent foundation templates, a first end of the strut abuts against the insert template, and the sliding truss has a second insertion hole for installing a strut corresponding to the insert template, the second end of the strut is inserted into the second insertion hole, and a limiting member is detachably installed on the second end of the strut, the limiting member abutting against the sliding truss to limit the length of the strut inserted into the sliding truss; Alternatively, the adjusting template mechanism includes a filler template and a splice template for retaining concrete, a tapering frame for increasing the strength of the filler template, and a strut for limiting the position of the filler template and the splice template. The filler template is installed on the tapering frame, and the first end of at least one strut abuts against the tapering frame. The first end of at least one strut abuts against the splice template. The sliding truss has a first insertion hole for installing a strut corresponding to the filler template and a second insertion hole for installing a strut corresponding to the splice template. The strut corresponding to the filler template is inserted into the first insertion hole, and the strut corresponding to the splice template is inserted into the second insertion hole. The second end of each strut is detachably fitted with a limiting member, which abuts against the sliding truss to limit the length of the strut inserted into the sliding truss.

5. The variable diameter circular arc inner mold as described in claim 4, characterized in that: The sliding truss includes two crossbeams, a connecting plate that connects the two crossbeams into one piece, and a plug plate for installing struts. The two crossbeams are spaced apart vertically. The plug plate is provided on the crossbeams, and the gap between the two ends of the two crossbeams forms a sliding groove. The plug plate is provided with a first plug hole and a second plug hole, or there are two plug plates, one of which is provided with a first plug hole and the other is provided with a second plug hole.

6. The variable diameter circular arc inner mold as described in claim 4, characterized in that: Both the missing template and the plug-in template are provided with support seats, and the first end of the support rod abuts against the support seat.

7. The variable diameter circular arc inner mold as described in claim 4, characterized in that: The limiting component is a pin, and the support rod is provided with a plurality of limiting holes distributed along its length direction, and the limiting component is inserted into the limiting holes.

8. The variable diameter circular arc inner mold as described in claim 7, characterized in that: The limiting holes are divided into two rows, and the two rows of limiting holes are staggered along the length of the support rod. The limiting member is wedge-shaped.

9. The variable diameter circular arc inner mold as described in claim 4, characterized in that: The filling template is connected to a curvature adjustment mechanism to adjust the curvature.

10. The variable diameter circular arc inner mold as described in claim 9, characterized in that: The curvature adjustment mechanism includes an outward expansion adjustment component for reducing curvature and an inward contraction adjustment component for increasing curvature. The inward contraction adjustment component is disposed on the corresponding base template or filler template. One end of the outward expansion adjustment component is used to abut or pivot with the corresponding base template or filler template, and the other end of the outward expansion adjustment component is detachably connected to the tapering skeleton.

11. The variable diameter circular arc inner mold as described in claim 10, characterized in that: The outward expansion adjustment assembly includes an adjustment rod, an adjustment component, and an adjustment seat. The adjustment seat is installed on the corresponding base template or filler template. One end of the adjustment rod abuts against or is pivotally connected to the adjustment seat, and the other end of the adjustment rod passes through the corresponding tapering frame or base frame. The adjustment component is detachably connected to the other end of the adjustment rod and abuts against the corresponding tapering frame or base frame to prevent the adjustment rod from falling off. The inward contraction adjustment assembly includes an adjustment steel strip, an adjustment screw, an adjustment nut, and a positioning plate. The adjustment steel strip is fixed to the corresponding base template or filler template. One end of the adjustment screw is fixed to the adjustment steel strip, and the other end of the adjustment screw passes through the positioning plate and is screwed to the adjustment nut. The adjustment nut abuts against the positioning plate to prevent the adjustment screw from falling off. The positioning plate is fixed to the corresponding filler template or base template.

12. The variable diameter circular arc inner mold as described in claim 9, characterized in that: The curvature adjustment mechanism includes an adjustment rod, an adjustment component, and an adjustment seat. The adjustment seat is installed on the corresponding base template or filler template. One end of the adjustment rod is pivotally connected to the adjustment seat, and the other end of the adjustment rod passes through the corresponding tapering frame or base frame. There are two adjustment components, which are detachably connected to the other end of the adjustment rod and located on both sides of the corresponding tapering frame or base frame. Each adjustment component abuts against the corresponding tapering frame.

13. The variable diameter circular arc inner mold as described in claim 11 or 12, characterized in that: The adjusting component is a pin, and the adjusting rod is provided with a plurality of adjusting holes distributed along its length direction, and the adjusting component is inserted into the adjusting holes.

14. The variable diameter circular arc inner mold as described in claim 13, characterized in that: The adjustment holes are divided into two rows, and the two rows of adjustment holes are staggered along the length of the adjustment rod. The adjustment element is wedge-shaped.

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