Full cast-in-place flue inner formwork mounting and dismounting structure

Abstract

The utility model discloses a full cast-in-place flue inner formwork mounting and dismounting structure which comprises a flue which is located in a reinforced concrete wall and integrally formed, a plurality of outer side aluminum formworks and a plurality of outer back ridges which are located on the outer wall of the reinforced concrete wall, and an inflation capsule is installed in the flue. Four detachable special-shaped fillet aluminum profile templates are fixedly mounted at four corners of the inner wall of the flue on the outer side of the inflatable capsule, and each special-shaped fillet aluminum profile template is connected with an outer side aluminum template and an outer back ridge through opposite-pull screws and is fastened through nuts; shear wall steel bars and steel bar meshes are bound on the inner wall of the flue, and a detachable check valve embedded part is fixedly installed at the design position of a smoke exhaust hole in the flue. The flue and the main body structure are integrally formed in a cast-in-place mode at a time, the appearance is good, the quality is improved, the concrete wall faces all meet the plastering-free requirement, secondary wet operation such as grouting plugging, plastering, water proofing and repairing is reduced, cost is reduced, the construction period is shortened, and potential safety hazards of edge holes of floors are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to an installation and disassembly structure of an inner formwork for a fully cast-in-place flue. Background Technique

[0002] In high-rise buildings, there are many flues. At present, in the standard floors, aluminum alloy formwork is used for construction. The aluminum alloy formwork has a good forming effect and can meet the requirements of fair-faced wall without plastering. However, if the formwork is supported and cast-in-place at one time, and the outer wall size of the flue is 420mm×420mm, it will be impossible to remove the formwork; if the finished flue is installed for the second time, due to the easy occurrence of water seepage, cracking, hollowing, and non-straight lines at the joint between the finished flue and the main structure, wet operations such as caulking, plastering, and waterproofing are required after installation, with complicated processes, time-consuming and laborious work, and high costs. In addition, during the construction process, the opening is left for a long time, with great potential safety hazards and a large amount of edge protection work; and after the house is handed over, due to the too thin wall thickness of the traditional finished flue, and it is not heat-resistant, afraid of vibration and easy to deform, etc., it is easy to crack and fall off after being heated during the use process after the household pastes wall tiles; therefore, many households need to increase the protective layer through processes such as bricklaying, wire meshing, and plastering during decoration, which greatly reduces the net usable area of the kitchen and also reduces the satisfaction.

[0003] Therefore, an installation and disassembly structure of an inner formwork for a fully cast-in-place flue is needed to improve the above deficiencies. Content of the Utility Model

[0004] Aiming at the deficiencies of traditional flue construction, the utility model provides an installation and disassembly structure of an inner formwork for a fully cast-in-place flue, which effectively solves the installation and disassembly of the inner formwork in the area where personnel cannot enter in a narrow space, and realizes the one-time full cast-in-place forming of the flue shaft. It is a practical, efficient and economical installation and disassembly device.

[0005] To achieve the above object, the utility model is realized through the following technical solutions: an installation and disassembly structure of an inner formwork for a fully cast-in-place flue, including a flue integrally formed in a reinforced concrete wall, a plurality of outer aluminum formworks and a plurality of external back ribs on the outer wall of the reinforced concrete wall. The flue formed by the full cast-in-place of reinforced concrete shares a wall with the shear wall on the structure side. An inflatable capsule serving as a core mold is installed in the flue. Four detachable special-shaped rounded-corner aluminum profile formworks are fixedly installed at the four corners of the inner wall of the flue on the outer side of the inflatable capsule. Each special-shaped rounded-corner aluminum profile formwork is connected to the outer aluminum formwork and the external back rib through a tie rod and tightened by a nut; shear wall steel bars and steel mesh sheets are tied on the inner wall of the flue, and a detachable check valve embedded part is fixedly installed at the designed position of the smoke exhaust hole in the flue.

[0006] Preferably, the check valve embedded part includes a cylinder, a screw rod and a first nut. The cylinder is located inside the check valve hole. The rear end of the screw rod is fixedly connected to the inside of the cylinder. The front end of the screw rod passes through the outer aluminum formwork, and the first nut is screwed onto the screw rod; the cylinder is designed as a reducing-diameter reducer.

[0007] Preferably, the external backing ribs are welded into a whole and reinforced by an integral backing rib to ensure the reinforcement strength, stiffness and stability.

[0008] Preferably, the diameter of the check valve hole embedded part is smaller at the end close to the special-shaped rounded-corner aluminum profile formwork than at the end close to the outer aluminum formwork.

[0009] Preferably, the outer side of the special-shaped rounded-corner aluminum profile formwork is an isosceles right triangle structure, and the side close to the inflatable capsule core mold is an arc structure.

[0010] Preferably, release agent is applied to the two sides of the special-shaped rounded-corner aluminum profile formwork far from the inflatable capsule core mold, the side of the outer aluminum formwork far from the external backing ribs, and the outer sidewall of the check valve hole embedded part.

[0011] Preferably, the flue position in each layer of construction is turned up by 200 mm, and pull bolts holes are arranged at appropriate positions at a height of 100 mm on the turned-up part on each side of the flue.

[0012] This all-cast-in-place flue inner formwork installation and removal structure proposed by the present utility model has the following beneficial effects compared with the prior art:

[0013] 1. By using aluminum formwork, the aluminum formwork has high stiffness, is not easy to deform, has high precision and a smooth surface, and can achieve the effect of avoiding plastering. Moreover, the flue is cast in place with reinforced concrete, so the strength and durability of the flue are enhanced, the precision is improved, and quality problems such as water seepage, cracking and hollowing are effectively solved. The operation is simple and fast, and the effect of avoiding plastering can be achieved, reducing wet operations such as secondary plugging of flue gaps, plastering and waterproofing. The householders do not need to build a brick protective layer later and no longer worry about problems such as hollowing, leakage and cracking of tiles at the flue part, greatly improving the housing rate, adding value to the project construction and use, being able to greatly reduce the safety hazards of edge openings during construction, saving a large amount of edge protection costs, and improving the overall image of the project.

[0014] 2. Due to the adoption of an inflatable capsule core mold and a special-shaped inverted rounded aluminum profile template, the principle of volume expansion by pressurizing the inflatable capsule is utilized to fill the inside of the box girder. After the concrete is poured and meets the strength requirement that the reserved holes do not collapse, the principle of volume shrinkage by releasing the gas of the inflatable capsule core mold is used to achieve form removal. Moreover, the inflatable capsule core mold can be repeatedly used, featuring simple and convenient construction, strong operability, good economy, high reliability, and high safety. The four corners of the flue are installed and constructed using detachable special-shaped inverted rounded aluminum profile templates. The special-shaped inverted rounded aluminum profile templates can not only form the flue space in combination with the cylindrical inflatable capsule but also serve as the positioning and supporting device for the inflatable capsule core mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic plan view of the one-time in-situ casting construction of the main structure in the present utility model;

[0016] Figure 2 It is an elevation view of the flue formwork installation in the present utility model;

[0017] Figure 3 It is a schematic structural view of the check valve embedded part adopted in the present utility model;

[0018] Figure 4 It is a schematic structural view of the special-shaped inverted rounded aluminum profile template adopted in the present utility model;

[0019] Figure 5 It is a schematic structural view of the inflatable capsule adopted in the present utility model;

[0020] Figure 6 It is a schematic structural view of the tie bolt in the present utility model;

[0021] Reference numerals in the figures: 1. Special-shaped inverted rounded aluminum profile template, 2. Inflatable capsule as the core mold, 3. Check valve embedded part, 4. Outer aluminum formwork, 5. External back rib, 6. Tie bolt, 7. Flue, 8. Cylinder, 9. First nut, 10. Screw rod, 11. Limiting part, 12. Tapered sleeve, 13. Second nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the embodiments of the present utility model and their accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to the attached Figure 1-6As shown in the figure, the technical solution provided by the embodiment of the present utility model: a formwork installation and removal structure for a fully cast-in-place flue, and the materials to be used include: C30 concrete with the same strength grade as the structure; ø6@200 steel mesh arranged in a single layer and bidirectionally; a cylindrical inflatable capsule with a height of 3m and a cross-sectional diameter of DN400mm, with a wall thickness of 2.3mm, and the inflation pressure of the capsule is maintained at 0.03 - 0.05MPa; a special-shaped inverted rounded aluminum profile formwork with a length of 3m and a rounded cross-section; a check valve embedded part configured at the flue check valve opening and removable and reusable; conventional components such as outer aluminum profile formwork, external backing ribs, tie rods, nuts, and anti-falling steel wires for the inflatable capsule. The following construction steps are included:

[0024] Step 1: Clean the base layer and carry out positioning and layout of the main structure;

[0025] Step 2: The outer wall size of the flue is 420mm×420mm. Bind the shear wall steel bars and the inner wall steel mesh of the flue, and install and fix the check valve embedded part at the designed position of the check valve hole;

[0026] During the construction of the steel bars in the flue, the material of the flue shaft wall is fully cast-in-place reinforced concrete, and the wall on the side close to the structure shares the wall with the shear wall; in order to ensure the net usable area of the kitchen, the non-shear wall side is designed with a wall thickness of 50mm, and is equipped with a ø6@100 single-layer and bidirectionally arranged steel mesh and is firmly tied to the shear wall.

[0027] The check valve hole is a smoke exhaust opening, and the detachable check valve embedded part device designed by the present utility model is used for embedding and leaving. The cylinder of this embedded part device is designed as a reducing head with a gradually changing diameter, which is convenient for disassembly and assembly and can be recycled. As Figure 3 shown.

[0028] Step 3: Install the special-shaped inverted rounded aluminum profile formwork 1, install the tie rod 6 with a tapered sleeve 12 on the special-shaped inverted rounded aluminum profile formwork, then install the outer aluminum formwork 4, and finally install the external backing rib 5 and tighten the second nut 13;

[0029] Pay attention to processing the ends of the steel bars on the inner side of the flue shaft to prevent damage to the rubber inflatable capsule. The outer formwork part at the flue corner is welded into a whole with the external backing rib. Due to the use of an integral external backing rib for reinforcement, the reinforcement strength, stiffness, and stability of the overall structure are ensured.

[0030] Step 4: Use a cylindrical rubber inflatable capsule 2 with a diameter of DN420mm and a length of 3m as the flue core mold for construction. The four corners are installed with detachable special-shaped inverted rounded aluminum profile formwork. The special-shaped inverted rounded aluminum profile formwork can not only form the flue space in combination with the cylindrical inflatable capsule, but also serve as a positioning and supporting device for the inflatable capsule core mold.

[0031] Install the inflatable capsule 2 in a contracted state, adjust it to the appropriate position and elevation, and use the principle of volume expansion under pressure of the inflatable capsule to fill the inside of the flue box girder. After the concrete pouring is completed and meets the strength requirement that the reserved check valve hole does not collapse, then use the principle of volume contraction of the inflatable capsule to achieve form removal.

[0032] One end of the inflatable capsule 2 is equipped with an air inlet valve, a pressure gauge, and a limiting member 11 to prevent the inflatable capsule core mold from floating upward under pressure during the pouring process. The inflatable capsule is inflated by an air compressor, and the air pressure is controlled according to the pressure gauge during the inflation process to ensure that the inner wall structure size of the flue is met after inflation is completed.

[0033] Using the inflatable capsule as the inner core mold of the flue can be repeatedly used. The utility model has the characteristics of simple and convenient construction, strong operability, good economy, good reliability, and high safety.

[0034] Step Five: During the concrete pouring process, assign a special person to monitor. First, pour a 200-mm-thick shear wall, and then pour a 50-mm-thick flue wall, and use the pipe lubricating mortar to cooperate with the pouring. Therefore, the pipe lubricating mortar transported by the pump pipe before pouring should be collected in the hopper for standby, and a wooden stick or hammer is used to vibrate it densely during the pouring process.

[0035] Step Six: At an appropriate time within 12h - 24h after the pouring is completed, deflate the inflatable capsule. After the inflatable capsule exhausts and shrinks, then remove the special-shaped inverted rounded aluminum profile formwork 1 at the flue part. Pay attention to the protection of the finished product during the removal process.

[0036] The aluminum formwork on the outside of the flue is constructed using conventional aluminum formwork. Due to the limited operation space in the narrow flue, the form removal method at the flue part is special, and it can only be removed from the outside of the flue. Make the special-shaped inverted rounded aluminum profile formwork according to the design scheme proposed by the utility model, and install four special-shaped inverted rounded aluminum profile formworks at the four corners of the flue well to fix, support, and protect the inflatable capsule. Therefore, the second nut should be installed inside the inverted rounded aluminum profile formwork and fixed into a whole. Anti-pollution protection measures should be taken at the end of the second nut to prevent concrete from falling into the nut during pouring and affecting form removal. During installation and removal, only need to screw in or out the tension rod passing through the tapered rubber hose sleeve to complete the installation, fixation, and removal work. All components can be repeatedly used, and the operation is convenient.

[0037] The check valve embedded part includes a cylinder 8, a screw rod 10 and a first nut 9. The cylinder 7 is located inside the check valve hole 3, and the embedded position dimension of the check valve hole, that is, the smoke exhaust opening, is matched correspondingly. It is designed as a reducing head with a gradually changing diameter, and the cylinder also has a smaller diameter at one end and a larger diameter at the other end. The rear end of the screw rod is fixedly connected inside the cylinder, and the first nut is screwed onto the screw rod. The front end of the screw rod 9 of the check valve embedded part passes through the special-shaped inverted rounded corner aluminum profile template, and the nut is rotated to clamp the special-shaped inverted rounded corner aluminum profile template. In this way, a circular check valve hole will be formed when pouring concrete. After the concrete dries, the outer aluminum formwork is removed, and then the check valve embedded part is taken off. The installation and removal are convenient, and it can be recycled and reused.

[0038] The outer side of the special-shaped inverted rounded corner aluminum profile template is an isosceles right triangle structure, and the side close to the inflatable capsule is an arc structure, and its arc structure can contact and fit with the outer side wall of the inflatable capsule core mold after inflation.

[0039] The outer side walls of the special-shaped inverted rounded corner aluminum profile template, the outer aluminum formwork 4 and the external back ribs 5 are all coated with a release agent, which is convenient for the special-shaped inverted rounded corner aluminum profile template and the outer aluminum formwork to be separated from the flue, and is beneficial to the smoothness and cleanliness of the flue.

[0040] The position of the flue in each layer of construction is turned up by 200 mm, and pull bolts holes are arranged at appropriate positions 100 mm above the turning-up part on each side of the flue 5. It can not only be used for fixation by using the pull bolt holes when installing the special-shaped inverted rounded corner aluminum profile template and the outer aluminum formwork, but also be used as the reinforcement of the suspended formwork during the previous pouring, and effectively ensure waterproofing.

[0041] The content not described in detail in the specification of the present utility model belongs to the prior art well known to those skilled in the art.

[0042] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation. The element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0043] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A fully cast-in-place flue inner formwork installation and removal structure, comprising a flue (7) integrally formed in a reinforced concrete wall, a plurality of outer aluminum formworks (4) and a plurality of outer back ribs (5) located on the outer wall of the reinforced concrete wall, characterized in that: A fully cast-in-place reinforced concrete flue (7) shares a wall with a shear wall on the structural side. An inflatable capsule (2) serving as a core mold is installed in the flue (7). Four detachable special-shaped rounded aluminum profile templates (1) are fixedly installed outside the inflatable capsule (2) at the four corners of the flue inner wall. Each special-shaped rounded aluminum profile template (1) is connected to the outer aluminum template (4) and the outer back rib (5) through a tension screw (6) and is fastened through a nut. Shear wall steel bars and steel mesh are tied to the inner wall of the flue, and a detachable check valve embedded component (3) is fixedly installed at the designed position of the smoke exhaust hole in the flue (7).

2. The fully cast-in-place flue inner formwork installation and disassembly structure according to claim 1 is characterized in that: The check valve embedded component (3) comprises a cylinder (8), a screw (10) and a first nut (9); the cylinder is located inside the check valve hole; the rear end of the screw (10) is fixedly connected to the inside of the cylinder (8); the front end of the screw (10) passes through the outer aluminum template (4); and the first nut (9) is screwed to the screw (10); the cylinder (8) is designed to have a gradually changing diameter reducer.

3. The fully cast-in-place flue inner formwork installation and disassembly structure according to claim 1 is characterized in that: The external back ribs (5) are welded into a whole.

4. The fully cast-in-place flue inner formwork installation and removal structure according to claim 2 is characterized in that: The diameter of the end of the check valve embedded part close to the special-shaped rounded aluminum profile template is smaller than the diameter of the end close to the outer aluminum template.

5. The fully cast-in-place flue inner formwork installation and removal structure according to claim 1 is characterized in that: The outer side of the special-shaped rounded aluminum profile template is an isosceles right triangle structure, and the side close to the inflatable capsule is an arc structure.

6. The fully cast-in-place flue inner formwork installation and removal structure according to claim 5 is characterized in that: The two sides of the special-shaped rounded aluminum profile template away from the inflatable capsule core mold, the side of the outer aluminum template away from the external back rib, and the outer side wall of the check valve embedded part are all coated with a release agent.

7. The fully cast-in-place flue inner formwork installation and disassembly structure according to claim 1 is characterized in that: The position of the smoke exhaust hole in each layer of the flue is turned up by 200mm, and tension screw holes are set at an elevation of 100mm at the turned-up position on each side of the flue.

8. The fully cast-in-place flue inner formwork installation and removal structure according to claim 1 is characterized in that: The specifications of the shear wall reinforcement and flue wall are ø6@200, and the steel mesh is arranged in a single layer and in two directions.

9. The fully cast-in-place flue inner formwork installation and disassembly structure according to claim 1 is characterized in that: The inflatable capsule has a size of 3m in height, a DN400mm cross-sectional diameter, and a wall thickness of 2.3mm. The inflation pressure of the inflatable capsule is maintained at 0.03-0.05MPa.

10. The fully cast-in-place flue inner formwork installation and removal structure according to claim 1, characterized in that: An air inlet valve and a pressure gauge are installed at one end of the inflatable capsule, as well as a limiter (11) for preventing the inflatable capsule from floating up after being pressurized during the pouring process.

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