Expansion joint form

Abstract

The application discloses a telescopic joint template and relates to the technical field of building construction, which solves the cracking problem in the process of early strength formation of concrete, and the technical scheme is as follows: the template comprises a first template and a second template, the first template and the second template are rotationally connected through a hinge assembly, a rubber pad is arranged between the first template and the second template, a plurality of first through holes are formed in the side walls of the first template and the second template close to the rubber pad, the first template and the second template are connected through a plurality of first bolts, the first bolts penetrate through the first through holes, and nuts are threadedly installed on the first bolts. The rubber pad arranged between the templates, the rubber sleeve on the pull rod and the long hole with a gap on the hinge are used to buffer the deformation of the template, the friction of the template is released, the friction is not directly transmitted to the concrete, and thus the cracking of the concrete is avoided.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, and specifically relates to an expansion joint template. Background Technology

[0002] Concrete pouring refers to the construction process of pouring the mixed concrete into a formwork, leveling it, and compacting it. Pouring requires continuity and uniformity, and must prevent segregation of the concrete. Leveling is done manually or mechanically to evenly spread and fill the entire poured surface with concrete.

[0003] The concrete generates a lot of heat in the early stages of setting. The steel formwork will stretch when heated, which will pull on the concrete and cause it to crack. In addition, the concrete will shrink during the early setting process. When the concrete shrinks, the formwork and the concrete deform inconsistently. However, the existing casting formwork is usually a single piece, and the formwork cannot move with the shrinkage of the concrete. The restraining force of the formwork on the concrete causes cracks to form. Summary of the Invention

[0004] The present invention aims to solve the above-mentioned technical problems and provide an expansion joint template.

[0005] The technical solution of the present invention is as follows: an expansion joint template, comprising a first template and a second template, the first template and the second template being rotatably connected by a hinge assembly, a rubber pad being provided between the first template and the second template, the first template and the second template having a plurality of first through holes on the sidewalls near the rubber pad, the first template and the second template being connected by a plurality of first bolts, the first bolts passing through the first through holes, the first bolts having nuts threaded onto the first bolts, an upper connecting member being fixedly installed on the front wall of the first template, a lower connecting member being fixedly installed on the front wall of the second template, the upper connecting member and the lower connecting member being connected by a connecting assembly, and both the upper connecting member and the lower connecting member having fixing components provided thereon;

[0006] The fixing component includes a fixing plate and a tie rod. The fixing plate is disposed on one side of the front wall of the first template / second template, and the tie rod passes through the fixing plate and the first template / second template, and the tie rod is threadedly connected to the fixing plate.

[0007] As a preferred embodiment of the present invention: the fixing component further includes a rubber sleeve, which is disposed on one side of the back wall of the first template / second template, the pull rod passes through the rubber sleeve, and the end of the pull rod away from the fixing plate extends out from the rubber sleeve.

[0008] As a preferred technical solution of the present invention: the connecting assembly includes a connecting plate, the connecting plate is fixedly connected to the upper connecting member, the bottom of the connecting plate is inserted into the lower connecting member, the lower connecting member has a second through hole, the connecting plate is connected to the lower connecting member by a second bolt, the second bolt passes through the second through hole, and a second nut is threaded on the second bolt.

[0009] As a preferred embodiment of the present invention, a gap is provided between the top and bottom of the second bolt and the inner wall of the second through hole.

[0010] As a preferred technical solution of the present invention: the hinge assembly includes a first page plate, a second page plate and a connecting shaft. The first page plate is fixedly connected to the front wall of the first template, and the second page plate is fixedly connected to the back wall of the second template. The first page plate and the second page plate are rotatably connected by the connecting shaft. A third through hole is provided on the first page plate.

[0011] As a preferred embodiment of the present invention: the connecting shaft passes through the third through hole, and gaps are provided between the top and bottom of the connecting shaft and the inner wall of the second through hole.

[0012] As a preferred embodiment of the present invention: the pull rod is hollow, and a cooling rod is provided inside the pull rod. The cooling rod is made of copper, and a pull ring is fixedly installed at the end of the cooling rod.

[0013] As a preferred technical solution of the present invention: the top of the pull rod is provided with a plurality of fourth through holes, a locking block is slidably disposed in the fourth through holes, the bottom of the locking block is configured as a frustum, and the inner wall of the rubber sleeve is provided with a locking groove, the locking groove being adapted to the locking block.

[0014] As a preferred technical solution of the present invention: an adapter groove is provided on the outer side of the top of the fourth through hole, a magnetic ring is fitted on the top of the card block, the magnetic ring is adapted to the adapter groove, and the magnetic ring is magnetically attracted to the pull rod.

[0015] As a preferred embodiment of the present invention: a support plate is fixedly installed inside the rubber sleeve, the slot is provided at the bottom of the support plate, and support parts are provided at both ends of the support plate. When the pull rod is located inside the rubber sleeve, the support parts are in contact with the pull rod. The support plate, support parts and the slot are all made of copper.

[0016] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0017] 1. This invention buffers template deformation by setting rubber pads between templates, putting rubber sleeves on tie rods, and setting elongated holes on hinges to leave gaps, so that the friction of the templates can be released and not directly transmitted to the concrete, thereby avoiding concrete cracking. Under the action of the rubber pads, the gap between the first template and the second template can be sealed. Through the setting of the hinge assembly, the first template can rotate relative to the second template to facilitate subsequent demolding.

[0018] 2. After demolding, the present invention allows the cooling rod to be placed in ice water to lower its temperature. Then, the cooling rod is inserted into the pull rod, further reducing its temperature. The pull rod absorbs heat from the rubber sleeve, causing the rubber sleeve to cool down. As the rubber sleeve cools, it contracts, allowing its outer wall to separate from the concrete, making it easier to remove. The cooling rod is made of copper, which has a high thermal conductivity, enabling it to quickly absorb heat from the rubber sleeve and cool rapidly after insertion into the ice water. The pull rod is located inside the rubber sleeve; the contraction of the rubber sleeve increases the pressure on the pull rod, thus increasing the friction between the pull rod and the rubber sleeve, allowing the pull rod to pull the rubber sleeve out with it.

[0019] 3. In this invention, when the cooling rod is inserted into the pull rod, the pull rod pushes the locking block upward through the frustum-shaped bottom of the locking block, so that the top of the locking block is inserted into the locking groove. Then the pull rod can be pulled out. At the same time as the pull rod is pulled, because the locking block is inserted into the locking groove, the pull rod can also pull the rubber sleeve out of the concrete, making the removal of the rubber tube more convenient. The magnetic ring is designed so that when the cooling rod is pulled out of the pull rod, the magnetic ring can move toward the fitting groove and insert into the fitting groove, thereby driving the locking block to move out of the locking groove, so that the pull rod can be separated from the rubber sleeve.

[0020] 4. The present invention, through the setting of the support plate, prevents the groove from deforming under pressure when concrete squeezes the rubber sleeve. Furthermore, the support plate, support part, and clamp are all made of copper, so when the cooling rod is inserted into the pull rod, the cooling rod can quickly absorb the heat of the support plate through the clamp, causing the temperature of the support plate to drop rapidly, thereby lowering the temperature of the rubber sleeve. The setting of the support plate not only prevents the groove from deforming but also increases the cooling speed of the rubber sleeve, thereby increasing the disassembly speed of the rubber sleeve. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 For the present invention Figure 1 A magnified structural diagram at point A;

[0023] Figure 3This is a three-dimensional structural schematic diagram from another perspective of the present invention;

[0024] Figure 4 This is a three-dimensional structural diagram of the upper and lower connectors of the present invention;

[0025] Figure 5 This is a side view of the connecting member of the present invention.

[0026] Figure 6 This is a cross-sectional schematic diagram of the pull rod mechanism of the present invention;

[0027] Figure 7 For the present invention Figure 6 A magnified structural diagram at point B.

[0028] Figures 1 to 7 The attached icons are numbered as follows:

[0029] 1. First template; 2. Second template; 3. Upper connector; 4. Lower connector; 401. Second through hole; 5. Connecting plate; 6. Second bolt; 7. First bolt; 8. First nut; 9. Rubber pad; 10. Fixing plate; 11. Pull rod; 1101. Fourth through hole; 1102. Adaptor groove; 12. Rubber sleeve; 1201. Slot; 13. First leaf plate; 1301. Third through hole; 14. Second leaf plate; 15. Connecting shaft; 16. Second nut; 17. Cooling rod; 18. Locking block; 19. Magnetic ring; 20. Support plate; 2001. Support part; 21. Pull ring. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1:

[0032] like Figure 1-5As shown, the expansion joint template in this embodiment includes a first template 1 and a second template 2. The first template 1 and the second template 2 are rotatably connected by a hinge assembly. A rubber pad 9 is provided between the first template 1 and the second template 2. The first template 1 and the second template 2 have multiple first through holes on their sidewalls near the rubber pad 9. The first template 1 and the second template 2 are connected by multiple first bolts 7, and the first bolts 7 penetrate the first through holes. The first through holes are elongated holes. When the first bolts 7 are inserted into the first through holes, there is a gap between the first bolts 7 and the first through holes, allowing the first template 1 and the second template 2 to move left and right relative to each other. The first bolts 7 penetrate the rubber pad 9. Nuts are threaded onto the first bolts 7. An upper connecting member 3 is fixedly installed on the front wall of the first template 1, and a lower connecting member 4 is fixedly installed on the front wall of the second template 2. The upper connecting member 3 and the lower connecting member 4 are connected by a connecting assembly. Both the upper connecting member 3 and the lower connecting member 4 are provided with fixing components for fixing the concrete wall.

[0033] The fixing assembly includes a fixing plate 10, a tie rod 11, and a rubber sleeve 12. The fixing plate 10 is disposed on one side of the front wall of the first template 1 / second template 2. The tie rod 11 passes through the fixing plate 10 and the first template 1 / second template 2, and is threadedly connected to the fixing plate 10. The rubber sleeve 12 is disposed on one side of the back wall of the first template 1 / second template 2. The tie rod 11 passes through the rubber sleeve 12, and one end of the tie rod 11 away from the fixing plate 10 extends out of the rubber sleeve 12. The arrangement of the tie rod 11 and the rubber sleeve 12 allows for better movement of the first template 1 and second template 2 during concrete shrinkage. Before pouring concrete, the required pouring frame is constructed using multiple first templates 1 and second templates 2. Rubber pads 9 are placed between the second templates 2. The first template 1 and the second template 2 are then connected by the first bolt 7 and the first nut 8. The tie rod 11 is then inserted into the rubber sleeve 12 and positioned inside the casting mold cavity. Concrete can then be poured into the casting mold cavity. After the concrete is poured and initially solidified, the first nuts 8 are loosened to allow the first template 1 and the second template 2 to move slightly. This allows the first template 1 and the second template 2 to follow the shrinkage of the concrete during subsequent setting, effectively preventing concrete cracking. The rubber pads 9 also seal the gap between the first template 1 and the second template 2. The hinge assembly allows the first template 1 to rotate relative to the second template 2 for easy demolding.

[0034] It should be noted that this template is particularly suitable for the inner formwork of the box girder, because the inner formwork is constrained on all sides and cannot provide room for the concrete to deform freely. Templates are set on both the front and back of the concrete to form a pouring cavity for concrete pouring.

[0035] In this embodiment, preferably, the connecting assembly includes a connecting plate 5, which is fixedly connected to the upper connecting member 3. The bottom of the connecting plate 5 is inserted into the lower connecting member 4. The lower connecting member 4 has a second through hole 401. The connecting plate 5 is connected to the lower connecting member 4 by a second bolt 6. The second bolt 6 passes through the second through hole 401. A second nut 16 is threaded onto the second bolt 6. There are gaps between the top and bottom of the second bolt 6 and the inner wall of the second through hole 401, so that when the second nut 16 is loosened, the second bolt 6 can move up and down relative to the second through hole 401, thereby allowing the upper and lower templates to move relative to each other.

[0036] In this embodiment, preferably, the hinge assembly includes a first page plate 13, a second page plate 14, and a connecting shaft 15. The first page plate 13 is fixedly connected to the front wall of the first template 1, and the second page plate 14 is fixedly connected to the back wall of the second template 2. The first page plate 13 and the second page plate 14 are rotatably connected by the connecting shaft 15. A third through hole 1301 is provided on the first page plate 13, and the connecting shaft 15 passes through the third through hole 1301. A gap is provided between the top and bottom of the connecting shaft 15 and the inner wall of the second through hole 1301, so that the connecting shaft 15 can move up and down relative to the third through hole 1301, thereby allowing the first page plate 13 and the second page plate 14 to move relative to each other, and thus allowing the upper template and the lower template to move relative to each other. Both the second through hole 401 and the third through hole 1301 are set in the shape of a racetrack.

[0037] The present invention includes two embodiments. One is an inner template for the web concrete of a bridge box girder, in which two templates are set on both sides of the web concrete of the bridge box girder. The other is a bottom template for the top concrete of the bridge box girder, in which two templates are set at the top and bottom of the top concrete of the bridge box girder.

[0038] Example 2:

[0039] During use, it was found that after the concrete solidifies, the rubber sleeve 12 may stick to the concrete, making it difficult to pull the rubber sleeve 12 out of the concrete. Therefore, the following embodiments were designed.

[0040] like Figure 6 and Figure 7As shown, in this embodiment, unlike embodiment one, the pull rod 11 is hollow, and a cooling rod 17 is installed inside the pull rod 11. The cooling rod 17 is made of copper, and a pull ring 21 is fixedly installed at the end of the cooling rod 17 to facilitate pulling out the cooling rod 17. After demolding, the cooling rod 17 is first placed in ice water to lower its temperature, and then the cooling rod 17 is inserted into the pull rod 11, thereby lowering the temperature of the pull rod 11. The pull rod 11 absorbs heat from the rubber sleeve 12, thereby lowering the temperature of the rubber sleeve 12. The rubber sleeve 12 contracts as the temperature decreases, allowing its outer wall to separate from the concrete and making it easier to pull out. The cooling rod 17 is made of copper, which has a high thermal conductivity, enabling it to quickly absorb the heat from the rubber sleeve 12 and rapidly cool down after being inserted into ice water. The pull rod 11 is located inside the rubber sleeve 12. When the rubber sleeve 12 contracts, it increases the pressure on the pull rod 11, thereby increasing the friction between the pull rod 11 and the rubber sleeve 12, allowing the pull rod 11 to pull the rubber sleeve 12 out when it is pulled out.

[0041] In this embodiment, preferably, the top of the pull rod 11 has multiple fourth through holes 1101, and a locking block 18 is slidably disposed in the fourth through hole 1101. The bottom of the locking block 18 is shaped like a frustum. The inner wall of the rubber sleeve 12 has a locking groove 1201, which is adapted to the locking block 18. An adaptation groove 1102 is provided on the outer side of the top of the fourth through hole 1101. A magnetic ring 19 is fitted on the top of the locking block 18, which is adapted to the adaptation groove 1102. The magnetic ring 19 is magnetically attracted to the pull rod 11. When the cooling rod 17 is inserted into the pull rod 11, the pull rod 11 is moved through the locking block 18. The frustum-shaped bottom of block 18 pushes the locking block 18 upward, so that the top of the locking block 18 is inserted into the locking slot 1201, and then the pull rod 11 can be pulled out. At the same time as the pull rod 11 is pulled, since the locking block 18 is inserted into the locking slot 1201, the pull rod 11 can also pull the rubber sleeve 12 out of the concrete, making the removal of the rubber tube more convenient. The setting of the magnetic ring 19 allows the magnetic ring 19 to move toward the adapter slot 1102 and insert into the adapter slot 1102 when the cooling rod 17 is pulled out from the pull rod 11, thereby driving the locking block 18 to move out of the locking slot 1201, so that the pull rod 11 can be separated from the rubber sleeve 12.

[0042] In this embodiment, preferably, a support plate 20 is fixedly installed inside the rubber sleeve 12, and the slot 1201 is located at the bottom end of the support plate 20. Support portions 2001 are provided at both ends of the support plate 20. When the pull rod 11 is located inside the rubber sleeve 12, the support portion 2001 contacts the pull rod 11. The support plate 20, support portions 2001, and slot 18 are all made of copper. Through the setting of the support plate 20, when concrete compresses the rubber sleeve 12, the slot 120... 1. It will not deform under pressure, and the support plate 20, support part 2001 and locking block 18 are all made of copper. When the cooling rod 17 is inserted into the pull rod 11, the cooling rod 17 can quickly absorb the heat of the support plate 20 through the locking block 18, so that the temperature of the support plate 20 drops rapidly, thereby reducing the temperature of the rubber sleeve 12. By setting the support plate 20, not only can the deformation of the locking groove 1201 be prevented, but the cooling speed of the rubber sleeve 12 can also be increased, thereby increasing the disassembly speed of the rubber sleeve 12.

[0043] The method of using this invention includes the following steps:

[0044] S1. Assemble the formwork according to the shape of the concrete structure. Rubber pads 9 should be placed between adjacent formwork during assembly.

[0045] S2. Insert the pull rod 11 into the rubber sleeve 12 and install the pull rod 11 and the washer nut assembly;

[0046] S3. Pour concrete and allow it to cure;

[0047] S4. Demolding;

[0048] S5. Remove the tie rod 11 and washer nut assembly;

[0049] S6. Remove the rubber sleeve 12 from the concrete for reuse.

[0050] The working principle of this invention is as follows: Before pouring concrete, the required pouring frame is constructed using multiple first templates 1 and second templates 2. A rubber pad 9 is placed between the first templates 1 and second templates 2. The first templates 1 and second templates 2 are then connected using first bolts 7 and nuts. A tie rod 11 is then inserted into a rubber sleeve 12, with the rubber sleeve 12 positioned within the pouring mold cavity. Concrete can then be poured into the pouring mold cavity. After the concrete is poured and initially solidified, multiple first nuts 8 and second nuts 16 are loosened, allowing the first templates 1 and second templates 2 to move slightly. This allows the first templates 1 and second templates 2 to shift with the concrete during subsequent setting and shrinkage, effectively preventing concrete cracking. After demolding, a cooling rod 17 is first placed in ice water to lower its temperature. Then, the cooling rod 17 is inserted into the tie rod 11, further lowering its temperature. The cooling rod 17 absorbs heat from the rubber sleeve 12, thus lowering its temperature. As the temperature decreases, the rubber sleeve 12 contracts, allowing its outer wall to separate from the concrete, making it easier to remove. When the cooling rod 17 is inserted into the pull rod 11, the pull rod 11 pushes the locking block 18 upwards via its frustum-shaped bottom, causing the top of the locking block 18 to insert into the locking groove 1201. Then, the pull rod 11 can be pulled out. While pulling the lever 11, the locking block 18 is inserted into the locking slot 1201, allowing the lever 11 to pull the rubber sleeve 12 out of the concrete, making the removal of the rubber sleeve more convenient. The magnetic ring 19 is designed so that when the cooling rod 17 is pulled out of the lever 11, the magnetic ring 19 can move toward the adapter slot 1102 and insert into the adapter slot 1102, thereby driving the locking block 18 to move out of the locking slot 1201, allowing the lever 11 to separate from the rubber sleeve 12.

[0051] The above description is a detailed description of the preferred embodiments of the present invention. However, the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modifications made under the technical spirit of the present invention should fall within the patent scope covered by the present invention.

Claims

1. An expansion joint template, comprising a first template (1) and a second template (2), characterized in that: The first template (1) and the second template (2) are rotatably connected by a hinge assembly. A rubber pad (9) is provided between the first template (1) and the second template (2). The first template (1) and the second template (2) have multiple first through holes on the side wall near the rubber pad (9). The first template (1) and the second template (2) are connected by multiple first bolts (7), and the first bolts (7) pass through the first through holes. Nuts are threaded on the first bolts (7). An upper connector (3) is fixedly installed on the front wall of the first template (1). A lower connector (4) is fixedly installed on the front wall of the second template (2). The upper connector (3) and the lower connector (4) are connected by a connecting assembly. Both the upper connector (3) and the lower connector (4) are provided with fixing assemblies. The fixing component includes a fixing plate (10) and a tie rod (11). The fixing plate (10) is disposed on one side of the front wall of the first template (1) / second template (2). The tie rod (11) passes through the fixing plate (10) and the first template (1) / second template (2), and the tie rod (11) is threadedly connected to the fixing plate (10). The fixing assembly also includes a rubber sleeve (12), which is disposed on one side of the back wall of the first template (1) / second template (2). The pull rod (11) passes through the rubber sleeve (12), and the end of the pull rod (11) away from the fixing plate (10) extends out from the rubber sleeve (12). The pull rod (11) is hollow, and a cooling rod (17) is provided inside the pull rod (11). The cooling rod (17) is made of copper, and a pull ring (21) is fixedly installed at the end of the cooling rod (17). The top of the pull rod (11) is provided with multiple fourth through holes (1101), and a locking block (18) is slidably disposed in the fourth through hole (1101). The bottom of the locking block (18) is set in a frustum shape. The inner wall of the rubber sleeve (12) is provided with a locking groove (1201). The locking groove (1201) is adapted to the locking block (18). The outer side of the top of the fourth through hole (1101) is provided with an adaptation groove (1102). A magnetic ring (19) is fitted on the top of the locking block (18). The magnetic ring (19) is adapted to the adaptation groove (1102). The magnetic ring (19) and the pull rod (11) are magnetically attracted to each other.

2. The expansion joint template as described in claim 1, characterized in that: The connecting assembly includes a connecting plate (5), which is fixedly connected to the upper connecting member (3). The bottom of the connecting plate (5) is inserted into the lower connecting member (4). The lower connecting member (4) has a second through hole (401). The connecting plate (5) is connected to the lower connecting member (4) by a second bolt (6). The second bolt (6) passes through the second through hole (401), and a second nut (16) is threaded onto the second bolt (6).

3. The expansion joint template as described in claim 2, characterized in that: A gap is provided between the top and bottom of the second bolt (6) and the inner wall of the second through hole (401).

4. The expansion joint template as described in claim 1, characterized in that: The hinge assembly includes a first page plate (13), a second page plate (14), and a connecting shaft (15). The first page plate (13) is fixedly connected to the front wall of the first template (1), and the second page plate (14) is fixedly connected to the back wall of the second template (2). The first page plate (13) and the second page plate (14) are rotatably connected by the connecting shaft (15). A third through hole (1301) is provided on the first page plate (13).

5. The expansion joint template as described in claim 4, characterized in that: The connecting shaft (15) passes through the third through hole (1301), and gaps are provided between the top and bottom of the connecting shaft (15) and the inner wall of the second through hole (401).

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