Air bag mold for making square piles and method for making square piles

Abstract

The present invention belongs to the technical field of prefabricated components for construction, and relates to an airbag mold for making square piles and a method for making square piles. The airbag comprises an airbag, and the outer wall of the airbag is fixed with a shaping structure, and the shaping structure comprises a metal sheet fixedly connected to the airbag. When the airbag is inflated, the metal sheet matches the shape of the outer wall of the airbag and fits tightly with the outer wall of the airbag. The present invention can significantly shorten the pile making time, and the operation of the airbag mold is simple and quick, and no complicated installation and disassembly process is required, which greatly reduces the pile making cycle and improves the construction efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of prefabricated components for construction, and relates to an air bag mold for making square piles and a method for making the square piles. Background Art

[0002] Traditional square pile production usually uses steel molds as forming tools. This method uses pre-processed steel plates to assemble molds, then pour concrete, and remove the molds after solidification. The advantages of this method are high precision and good strength, but the disadvantages are heavy weight, inconvenient movement, complex assembly and disassembly, and the need for cleaning and maintenance after each use, which increases labor intensity and cost.

[0003] Another method is the airbag mold method: this method uses an inflatable rubber bag as a mold, which is unfolded and fixed before pouring, and deflated and taken out after pouring. The advantages of the airbag mold are that it is light and flexible, easy to carry and store, but the problem is that it has poor durability and is easily damaged, especially in high temperature environments, it is prone to aging and deterioration.

[0004] The above two pile making methods have their own advantages, but also have obvious shortcomings. The steel mold method has the problems of complex operation and high labor intensity, which is not suitable for the needs of large-scale production and rapid construction. Although the airbag mold method solves some problems, it still faces the problems of poor durability and easy damage, which limits its wide promotion and application. Summary of the invention

[0005] The object of the present invention is to provide an air bag mold for making square piles and a method for making square piles in view of the above problems.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An airbag mold for making square piles includes an airbag, the outer wall of which is fixed with a shaping structure, the shaping structure includes a metal sheet fixedly connected to the airbag, and when the airbag is inflated, the metal sheet matches the shape of the outer wall of the airbag and fits tightly with the outer wall of the airbag.

[0008] In the above-mentioned airbag mold for making square piles, the metal sheet has several pieces and the cross section is L-shaped, or the metal sheet has several pieces and the cross section is U-shaped, or the metal sheet has several pieces and the cross section is straight, or the metal sheet has several pieces and the cross section is arc-shaped.

[0009] In the above-mentioned airbag mold for making square piles, the metal sheet has a cross section of one or more of L-shaped, U-shaped, straight-shaped or arc-shaped.

[0010] In the above-mentioned airbag mold for making square piles, the metal sheet and the airbag are fixedly connected via a filling block.

[0011] In the above-mentioned airbag mold for making square piles, the inner wall shape of the filling block matches the outer wall shape of the airbag when it is inflated, and the outer wall shape of the filling block matches the inner wall shape of the metal sheet.

[0012] In the above-mentioned airbag mold for making square piles, the shaping structure also includes a shaping jacket, and the airbag and the metal sheet are located in the shaping jacket.

[0013] In the above-mentioned airbag mold for making square piles, the airbag is provided with at least one air nozzle which can communicate with the outside world, the two ends of the shaping jacket are closed, and the air nozzle extends out of one end of the shaping jacket.

[0014] In the above-mentioned airbag mold for making square piles, there are several airbags, and a support member is arranged inside the shaping outer jacket. When the airbags are inflated, the outer walls of the several airbags are in close contact with the shaping outer jacket and the outer wall of the support member respectively.

[0015] In the above-mentioned air bag mold for making square piles, the outer wall of the metal sheet has a layer of polyurethane coating, and the air bag is provided with at least one air nozzle that can communicate with the outside world.

[0016] A method for making square piles according to the above-mentioned airbag mold for making square piles comprises the following steps:

[0017] Step A, inflation stage: Lay the airbag mold at a predetermined position, inflate the airbag, expand the metal sheet and the outer wall of the airbag synchronously, and then fix the airbag mold in the mold groove.

[0018] Step B, pouring stage: When the airbag is fully inflated, apply a release agent to the outer wall of the metal sheet and inject concrete slurry into the mold groove.

[0019] Step C, Solidification stage: After stopping grouting, maintain the pressure in the airbag to allow the concrete to solidify.

[0020] Step D, demoulding stage: after confirming that the concrete is fully solidified and forms a primary precast pile, the gas in the air bag is discharged, and the metal sheet and the air bag are pulled out from the primary precast pile to obtain a hollow square pile with a hollow structure in the middle.

[0021] Compared with the prior art, the advantages of the present invention are:

[0022] 1Significantly shorten the pile making time: The airbag mold is easy and quick to operate, without complicated installation and disassembly procedures, which greatly reduces the pile making cycle and improves construction efficiency.

[0023] 2 Reduce labor costs: The airbag mold is light and easy to carry, which reduces a lot of labor input and reduces construction costs.

[0024] 3. Improve the quality of finished products: The design of combining the airbag mold with the metal sheet makes the size and shape of the square pile more precise, the surface is smooth and beautiful, and enhances the market competitiveness of the product.

[0025] 4. Extend the life of the mold: The addition of metal flakes effectively protects the airbag membrane, reduces wear and aging, extends the service life of the mold, and reduces maintenance frequency and costs.

[0026] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a structural schematic diagram of the present invention,

[0028] Figure 2 yes Figure 1 Schematic diagram of the other direction.

[0029] Figure 3 It is another structural schematic diagram of the present invention.

[0030] Figure 4 yes Figure 3 Schematic diagram of the other direction.

[0031] Figure 5 It is another structural schematic diagram of the present invention.

[0032] Figure 6 yes Figure 5 Schematic diagram of the other direction.

[0033] Figure 7 It is another structural schematic diagram of the present invention.

[0034] Figure 8 yes Figure 7 Schematic diagram of the other direction.

[0035] Fig. 9 It is another structural schematic diagram of the present invention.

[0036] In the figure: airbag 1, metal sheet 2, filling block 3, shaping jacket 5, support member 6, steel pipe 6a, partition plate 6b. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0038] Example 1

[0039] like Figure 1-2As shown, an airbag mold for making square piles includes an airbag 1, the outer wall of the airbag 1 is fixed with a shaping structure, the shaping structure includes a metal sheet 2 fixedly connected to the airbag 1, the airbag 1 is made of high-strength rubber, and the metal sheet 2 is preferably made of stainless steel. When the airbag is inflated, the metal sheet 2 is adapted to the shape of the outer wall of the airbag 1 and fits tightly with the outer wall of the airbag 1. The thickness of the metal sheet 2 is between 0.4-1mm, and the width is adjusted according to its actual shape, such as 5cm, 10cm, 15cm, etc., which is not limited in this embodiment, and the length of the metal sheet 2 is adapted to the length of the airbag 1.

[0040] The outer wall of the metal sheet 2 has a polyurethane coating to improve the wear resistance and waterproof performance.

[0041] In this embodiment, when the airbag 1 is inflated, the cross section of the airbag 1 is rectangular, circular, elliptical or polygonal. Of course, the cross section of the airbag 1 can also be other irregular shapes. Preferably, in order to fit the square pile, when the airbag 1 is inflated, the cross section of the airbag 1 is rectangular.

[0042] The metal sheet 2 has several pieces and has an L-shaped cross section, or the metal sheet 2 has several pieces and has a U-shaped cross section, or the metal sheet 2 has several pieces and has a straight cross section, or the metal sheet 2 has several pieces and has an arc cross section.

[0043] The preferred solution, combined Fig. 9 As shown, the metal sheet 2 includes one or more of L-shaped, U-shaped, straight-shaped or arc-shaped cross sections. In other words, the metal sheet 2 can be a combination of different shapes as long as the combination can be compatible with the outer wall of the airbag 1.

[0044] It should be noted that a certain gap needs to be left between adjacent metal sheets 2 so that when the airbag 1 is inflated, the metal sheets 2 do not collide or overlap with each other. In addition, the airbag 1 is not limited to one, but can also be a combination of multiple airbags 1. Alternatively, it can be considered that one airbag mold is a basic unit, and several airbag molds can be combined with each other, or, in one airbag mold, there can be two or more airbags 1 combined.

[0045] The preferred solution, combined Figure 3 , Figure 4 and Fig. 9 As shown, the metal sheet 2 and the airbag 1 are fixedly connected via a filling block 3 .

[0046] As described above, the material of the airbag 1 is high-strength rubber, and the material of the metal sheet 2 is stainless steel. Preferably, the airbag 1 is made of EPDM rubber, the metal sheet 2 is made of 304 stainless steel, and the filling block 3 is made of polystyrene foam. The airbag 1, the filling block 3 and the metal sheet 2 are fixedly connected by an adhesive. The adhesive can be a two-component epoxy resin glue, which forms a tough bonding layer after curing to ensure that the metal sheet is tightly combined with the airbag membrane.

[0047] In order to make the filling block 3 fit tightly with the airbag 1 and the metal sheet 2, the inner wall shape of the filling block 3 matches the outer wall shape of the airbag 1 when it is inflated, and the outer wall shape of the filling block 3 matches the inner wall shape of the metal sheet 2.

[0048] The airbag 1 is provided with an inflation port and a deflation port for inflation and deflation. In the present embodiment, the airbag 1 is provided with at least one air nozzle that can be connected to the outside world. The air nozzle can be connected to an inflation device such as a compressed air machine for inflation. The air nozzle can be disconnected from the compressed air machine or a three-way valve can be connected between the air nozzle and the compressed air machine to inflate and deflate through the air nozzle.

[0049] like Figure 3-Figure 9 As shown, the shaping structure further includes a shaping jacket 5 , and the airbag 1 and the metal sheet 2 are located inside the shaping jacket 5 .

[0050] Specifically, when the shaping jacket 5 is expanded, it can be determined according to the internal hollow shape of the square pile to be manufactured. As mentioned above, the cross-section of the airbag 1 is rectangular, circular, elliptical, polygonal, etc., and the cross-section of the shaping jacket 5 can also be rectangular, circular, elliptical, polygonal, etc. Figure 3 As shown, the cross section of the airbag 1 is circular, the metal sheet 2 is L-shaped, and the molded jacket 5 is rectangular.

[0051] There are several airbags 1, and a support member 6 is arranged inside a shaping outer shell 5. When the airbags are inflated, the outer walls of the several airbags 1 are in close contact with the outer walls of the shaping outer shell 5 and the support member 6 respectively.

[0052] like Figure 5 and Figure 6 As shown, the support member 6 is a steel tube, and a plurality of airbags 1 surround the support member 6. When the airbags 1 are inflated, the airbags 1 respectively support the support member 6 and the shaping jacket 5, and expand the shaping jacket 5.

[0053] Or, if Figure 7-Figure 8 As shown, considering that the airbags 1 are independent and stable in support, the support member 6 is a combination of a steel tube 6a and a partition 6b. The partitions 6b are evenly distributed around the steel tube 6a, and every two adjacent airbags 1 are separated by a partition 6b.

[0054] The airbag 1 is provided with at least one air nozzle which can communicate with the outside world. Both ends of the shaping jacket 5 are closed, and the air nozzle extends out of one end of the shaping jacket 5 .

[0055] Example 2

[0056] This embodiment provides a method for making square piles based on the airbag mold for making square piles in Embodiment 1, comprising the following steps:

[0057] Step A, inflation stage: Lay the airbag mold at a predetermined position, inflate the airbag 1, so that the metal sheet 2 and the outer wall of the airbag 1 expand synchronously, and then fix the airbag mold in the mold groove.

[0058] Step B, casting stage: when the airbag is fully inflated, a release agent is applied to the outer wall of the metal sheet 2, and concrete slurry is injected into the mold groove.

[0059] Step C, solidification stage: After stopping grouting, maintain the pressure in the airbag 1 to allow the concrete to stand and solidify.

[0060] Step D, demoulding stage: after confirming that the concrete is fully solidified and forms a primary precast pile, the gas in the airbag 1 is discharged, and the metal sheet 2 and the airbag 1 are pulled out from the primary precast pile to obtain a hollow square pile with a hollow structure in the middle.

[0061] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways without departing from the spirit of the present invention.

Claims

1. An airbag mold for making square piles, comprising an airbag (1), characterized in that: The outer wall of the airbag (1) is fixed with a shaping structure, and the shaping structure includes a metal sheet (2) fixedly connected to the airbag (1). When the airbag is inflated, the metal sheet (2) matches the shape of the outer wall of the airbag (1) and fits tightly with the outer wall of the airbag (1).

2. The air bag mold for making square piles according to claim 1, characterized in that: The metal sheet (2) has a plurality of pieces and has an L-shaped cross section, or the metal sheet (2) has a plurality of pieces and has a U-shaped cross section, or the metal sheet (2) has a plurality of pieces and has a straight cross section, or the metal sheet (2) has a plurality of pieces and has an arc-shaped cross section.

3. The air bag mold for making square piles according to claim 1, characterized in that: The metal sheet (2) has a cross section that is one or more of an L-shaped, U-shaped, straight-line or arc-shaped.

4. The air bag mold for making square piles according to claim 1, characterized in that: The metal sheet (2) and the airbag (1) are fixedly connected via a filling block (3).

5. The air bag mold for making square piles according to claim 4, characterized in that: The inner wall shape of the filling block (3) matches the outer wall shape of the airbag (1) when it is inflated, and the outer wall shape of the filling block (3) matches the inner wall shape of the metal sheet (2).

6. The air bag mold for making square piles according to claim 1, characterized in that: The shaping structure further comprises a shaping outer shell (5), wherein the air bag (1) and the metal sheet (2) are located inside the shaping outer shell (5).

7. The air bag mold for making square piles according to claim 6, characterized in that: The airbag (1) is provided with at least one air nozzle which can communicate with the outside world, the two ends of the shaping jacket (5) are closed, and the air nozzle extends out of one end of the shaping jacket (5).

8. The air bag mold for making square piles according to claim 7, characterized in that: There are a plurality of airbags (1), and a support member (6) is arranged inside the shaping jacket (5). When the airbags are inflated, the outer walls of the plurality of airbags (1) are in close contact with the outer walls of the shaping jacket (5) and the support member (6).

9. The air bag mold for making square piles according to claim 1, characterized in that: The outer wall of the metal sheet (2) has a layer of polyurethane coating, and the air bag (1) is provided with at least one air nozzle that can communicate with the outside world.

10. A method for making square piles using an airbag mold for making square piles according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step A, inflation stage: the airbag mold is laid at a predetermined position, air is inflated into the airbag (1), so that the metal sheet (2) and the outer wall of the airbag (1) expand synchronously, and then the airbag mold is fixed in the mold groove. Step B, casting stage: when the airbag is fully inflated, a release agent is applied to the outer wall of the metal sheet (2), and concrete slurry is injected into the mold groove. Step C, solidification stage: After stopping the grouting, the pressure in the air bag (1) is maintained to allow the concrete to solidify. Step D, demoulding stage: after confirming that the concrete is fully solidified and forms a primary precast pile, the gas in the air bag (1) is discharged, and the metal sheet (2) and the air bag (1) are pulled out from the primary precast pile to obtain a hollow square pile with a hollow structure in the middle.

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