Fixing device for preventing hollow membrane shell from floating and mounting method thereof

Abstract

The invention belongs to the technical field of building construction, and particularly relates to a fixing device for preventing a hollow membrane shell from floating and a mounting method thereof.The fixing device comprises an inner screw rod, a movable clamping assembly, a connector nut, an outer screw rod, a limiting rod, a clamp shaped like a Chinese character'shan 'and a fastening nut, one end of the inner screw rod is connected with a steel bar in a floor structure, and the other end of the inner screw rod penetrates through the hollow membrane shell; the movable clamping assemblies are movably arranged on the two sides of the hollow membrane shell, the outer screws penetrate through a formwork in a floor structure and are detachably connected with the inner screws through the connector nuts, the limiting rods abut against battens in the floor structure through the mountain-shaped clamps, the battens are connected with the formwork in a pressing mode, the mountain-shaped clamps are connected with the outer screws in a threaded mode, and multiple sets of fastening nuts are arranged. The hollow membrane shell fixing device has the beneficial effects that the hollow membrane shell fixing device is suitable for fixing hollow membrane shells of different sizes, and the cost is saved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a fixing device for preventing a hollow membrane shell from floating and an installation method thereof. Background Art

[0002] In modern building construction, hollow slabs are widely used due to their significant advantages such as good heat insulation, sound insulation and reduced structural weight. However, during the pouring of concrete for hollow slab structures, due to the fluidity of concrete before initial setting, lightweight components such as hollow membrane shells are easily affected by buoyancy and float up, resulting in inaccurate position in the slab, which in turn affects the overall structural layout and stress performance of the slab, and even affects the safety of the building. Although there are many fixing methods in the prior art, they generally have problems such as complex installation, high cost or poor fixing effect. Summary of the invention

[0003] The present invention is aimed at the above-mentioned problems and specifically designs a fixing device for preventing the hollow membrane shell from floating and an installation method thereof, so that it is suitable for fixing hollow membrane shells of different sizes and saves costs.

[0004] To achieve the above-mentioned purpose, the present invention provides a fixing device for preventing the hollow membrane shell from floating, comprising an inner screw, a movable clamping assembly, a joint nut, an outer screw, a limiting rod, a mountain-shaped clip and a fastening nut, wherein one end of the inner screw is connected to the steel bar in the floor structure, and the other end passes through the hollow membrane shell and is threadedly connected to the joint nut, the movable clamping assembly is movably arranged on both sides of the hollow membrane shell, the outer screw passes through the template in the floor structure, and is detachably connected to the inner screw through the joint nut, the limiting rod abuts against the wooden square in the floor structure through the mountain-shaped clip, the wooden square is crimped to the template, the mountain-shaped clip is threadedly connected to the outer screw, and there are multiple groups of fastening nuts, which are respectively threadedly connected to the inner screw and the outer screw.

[0005] Furthermore, the movable clamping assembly includes a fixed limiting plate and a movable limiting plate correspondingly arranged on both sides of the hollow membrane shell, the fixed limiting plate is fixedly connected to the inner screw, and the movable limiting plate is pressed into the hollow membrane shell through the fastening nut.

[0006] Furthermore, anti-loosening washers are installed on the sides of the fixed limiting plate and the movable limiting plate close to the nut.

[0007] Furthermore, a sealing gasket is installed on one side of the fixed limiting plate and the movable limiting plate close to the hollow membrane shell.

[0008] Preferably, the joint nut is a conical nut, and the large diameter surface of the conical nut abuts against the template.

[0009] Furthermore, a sealing gasket is installed between the joint nut and the template.

[0010] Furthermore, the mountain-shaped clamp includes a main body and movable parts symmetrically arranged on both sides of the main body, the main body is provided with an internal threaded through hole adapted to the external screw, extension parts are fixedly connected on both sides of the main body, the movable part is provided with a sleeve part matching the extension part, and the sleeve part is detachably connected to the main body through fasteners.

[0011] Optionally, the mountain-shaped clamp includes a body and rotating parts symmetrically arranged on both sides of the body, the body is provided with an internal threaded through hole adapted to the external screw, and the rotating parts are rotatably connected to the body via a hinge.

[0012] Furthermore, the mountain-shaped card has a plurality of groups of arc-shaped grooves, and a wear-resistant layer is arranged in the grooves.

[0013] The present invention also includes a method for installing a fixing device for preventing a hollow membrane shell from floating, comprising the following steps: 1) Before construction, the timber system is supported and the internal screws and the fixed limit plates are welded in advance; 2) The template is provided with a through hole adapted to the external screw, and the template is fixed on the wooden square system. After the external screw passes through the template, it is threadedly connected with the joint nut; 3) Set up multiple sets of limit rods under the wooden system, and use mountain-shaped clamps to fix the limit rods. and using a plurality of sets of fastening nuts to reinforce the mountain-shaped clamp; 4) Tie up the steel bars at the bottom of the hollow floor structure, then thread the inner screw rod and the joint nut, fix them on the formwork, and then place the hollow membrane shell on the fixed limit plate; 5) Adjust the length of the inner screw according to the height of the hollow membrane shell, connect the movable limit plate to the inner screw, and tighten it with a fastening nut to fix the hollow membrane shell; 6) Tie up the upper reinforcement bars in the hollow slab structure, pour concrete, wait for the concrete to solidify, and remove the fastening nuts, mountain clips, external screws and the wooden system supporting the formwork under the slab structure.

[0014] In summary, the present invention has the following advantages and beneficial technical effects: 1. The fixed limit plate and the movable limit plate in the present invention are used to increase the contact area with the hollow membrane shell, provide additional support and stability, prevent the hollow membrane shell from being damaged by the buoyancy of poured concrete, and ensure construction quality and safety; the movable limit plate is designed to be adjustable in position, and is used to cooperate with the fixed iron sheet to better adapt to the fixing requirements of hollow membrane shells of different heights; the inner screw is designed to remain in the hollow floor structure, one end of which is connected to the steel bar or other structure in the hollow floor structure, and the other end is provided with a thread matching the outer screw, which is used to connect with the outer screw and fix the hollow membrane shell.

[0015] 2. The joint nut in the present invention has a conical shape, which is used to cooperate with the screw rod, and its conical structure is used to provide additional locking force and loosening effect; the sealing gasket uses its elastic sealing characteristics to seal the joint surface between the components, effectively preventing concrete from leaking through the holes, avoiding pollution of the lower buildings, and ensuring the integrity and safety of the building structure. In addition, a non-slip and friction-enhancing sealing gasket is arranged on the surface of the limit plate to improve the adhesion with the floor structure; the external screw rod is designed to be detachable, one end of which is provided with a thread matching the conical nut, and the other end is used to connect with the formwork support system.

[0016] 3. The mountain-shaped clip in the present invention is connected to the outside of the limit rod to reinforce the hollow membrane shell and make it more tightly connected to the template wood system. In addition, the mountain-shaped clip is designed as an adjustable structure, which can adapt to the edges of limit rods of various sizes and shapes; there are multiple fastening nuts, which are used to fasten the outer screw with the joint nut, the fixed limit plate and the movable limit plate together to ensure the stability of the clamped hollow membrane shell; the design of the wear-resistant layer in the mountain-shaped clip is used to enhance the friction and wear resistance of the clamping surface of the mountain-shaped clip, improve the stability of the clamping limit rod, extend the service life of parts, and save maintenance costs; the anti-loosening washer utilizes the special design of the inner oblique tooth surface dislocation to make the cooperation between the nut and the screw have a self-locking function to prevent nuts and other fasteners from loosening due to vibration or impact during the concrete pouring process.

[0017] 4. The present invention has a simple structure and low cost. It is manufactured using conventional materials and simple processes at the construction site, which reduces production costs. The cooperation of the inner and outer screws and the locking action of the nut effectively prevents the floating of the hollow membrane shell during concrete pouring. The structure is compact, with few parts, and is easy to process and assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 is a perspective schematic diagram of a mountain-shaped card in Embodiment 1 of the present invention; Figure 3It is a schematic diagram of the structure of the Zhongshan type card according to the second embodiment of the present invention.

[0019] The reference numerals in the accompanying drawings are: 1. Internal screw; 2. Movable clamping assembly; 21. Fixed limit plate; 22. Movable limit plate; 3. Joint nut; 4. External screw; 5. Limit rod; 6. Mountain-shaped clamp; 61. Main body; 62. Moving part; 63. Rotating part; 64. Groove; 7. Tightening nut; 8. Hollow membrane shell; 9. Template; 10. Wooden square. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the implementation of the present invention clearer, the technical solution in the embodiment of the present invention will be described in more detail below in conjunction with the drawings in the embodiment of the present invention. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions; the described embodiments are part of the embodiments of the present invention, not all of the embodiments; the embodiments and directional terms described below with reference to the drawings are exemplary and intended to be used to explain the present invention, and cannot be understood as limitations on the present invention; based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The embodiments of the present invention are described in detail below in conjunction with the drawings: The following is combined with Figure 1-Figure 3 The present invention is described in further detail: Embodiment 1 like Figure 1 As shown, the present embodiment discloses a fixing device for preventing the hollow membrane shell from floating, comprising an inner screw 1, a movable clamping assembly 2, a joint nut 3, an outer screw 4, a limiting rod 5, a mountain-shaped clip 6 and a fastening nut 7. One end of the inner screw 1 is tied and fixed to the steel bar in the floor structure, and the other end passes through the hollow membrane shell 8 and is threadedly connected to the joint nut 3. The movable clamping assembly 2 is movably assembled on both sides of the hollow membrane shell 8. The outer screw 4 passes through the template 9 in the floor structure, and the upper end is detachably connected to the inner screw 1 through the joint nut 3. One side of the joint nut 3 abuts the hollow membrane shell 8, and the other side abuts the template 9 in the floor structure. The positioning rod 5 is made of a short steel pipe, one side of which is clamped in the groove 64 of the mountain-shaped clamp 6, and the other side abuts against the wooden square 10 in the floor structure. The upper end surface of the wooden square 10 is crimped with the template 9. The mountain-shaped clamp 6 is threadedly connected to the external screw 4. There are three groups of fastening nuts 7, one of which is threadedly connected to the internal screw 1, and the other two groups are sequentially threadedly connected to the external screw 4; the movable clamping assembly 2 includes a fixed limiting plate 21 and a movable limiting plate 22 symmetrically arranged on both sides of the hollow membrane shell 8. The limiting plates are made of flat iron. The fixed limiting plate 21 is welded to fix the internal screw 1, and the movable limiting plate 22 is sleeved on the outer periphery of the internal screw 1 and is crimped to the hollow membrane shell 8 through the fastening nut 7.

[0021] like Figure 1 As shown, wedge-shaped anti-loosening washers are installed between the fixed limit plate 21 and the joint nut 3, and between the movable limit plate 22 and the fastening nut 7; rubber sealing gaskets are glued on one side of the fixed limit plate 21 and the movable limit plate 22 that are crimped onto the hollow membrane shell 8; the joint nut 3 is a conical nut, and the large diameter surface of the conical nut abuts against the top of the template 9; an annular rubber sealing gasket is also installed between the joint nut 3 and the template 9.

[0022] like Figure 2 As shown, the mountain-shaped card 6 includes a main body 61 and movable parts 62 symmetrically arranged on both sides of the main body 61. The main body 61 is longitudinally provided with an internal threaded through hole compatible with the thread of the external screw 4, and the main body 61 is fixedly connected with an extension part on both sides in the lateral direction. The movable part 62 is provided with a sleeve part matching the extension part, and the movable part 62 is provided with a plurality of groups of countersunk holes. The sleeve part in the countersunk hole is detachably connected to the main body 61 through a fastener, and the fastener is preferably: a screw; the mountain-shaped card 6 has two groups of arc-shaped grooves 64, and the grooves 64 are coated with a wear-resistant rubber coating.

[0023] Embodiment 2 like Figure 3 As shown, the difference between this embodiment and the first embodiment is that: the mountain-shaped clamp 6 includes a main body 61 and rotating parts 63 symmetrically arranged on both sides of the main body 61, the main body 61 is longitudinally provided with an internal threaded through hole compatible with the external screw 4, and the rotating part 63 is rotatably connected to the main body 61 through a hinge. The hinge is preferably: a nail hinge with a wire constraint or a spring hinge to adjust the hinge angle between the main body 61 and the rotating part 63, so as to adapt to the clamping of limit rods 5 of different sizes or shapes; the rest of the technical features are the same.

[0024] Embodiment 3 The method for installing a fixing device for preventing a hollow membrane shell from floating of the present invention is as follows: Step 1: Before installation, the fixed limit plate 21 is welded and fixed to the inner screw rod 1 in the processing plant. In addition, the keel-wood square 10 system of the hollow floor structure is pre-supported at the construction site; Step 2: Open a through hole on the template 9 for installing the external screw 4, and lay the template 9 on the wooden square 10, then pass the external screw 4 through the through hole of the template 9, and thread the top of the external screw 4 with the joint nut 3, so as to assemble and fix the external screw 4 and the template 9; Step 3: Install two limit rods 5 under the wooden square 10, use the mountain-shaped clamp 6 to clamp and fix the limit rods 5, and use two sets of fastening nuts 7 to reinforce the mountain-shaped clamp 6; Step 4: Brush the mold release agent on the surface of the template 9, and tie the bottom reinforcement of the hollow floor structure according to the structural construction drawing, then thread the bottom of the inner screw 1 with the joint nut 3, so that the inner screw 1 is fixed on the template 9, wherein the axis of the inner screw 1 coincides with the axis of the outer screw 4, and then place the hollow membrane shell 8 on the fixed limit plate 21 welded to the inner screw 1; Step 5: Adjust the length of the inner screw 1 according to the height of the hollow membrane shell 8, then insert the inner screw 1 into the movable limit plate 22, and tighten and reinforce it with a locking washer and a fastening nut 7 to complete the fixation of the hollow membrane shell 8; Step 6: Finally, tie the upper steel bars in the hollow floor structure, pour concrete, wait for the concrete to solidify and meet the conditions for demolding, and then remove the two sets of fastening nuts 7, mountain-shaped clips 6, external screws 4 and the wooden square 10 system supporting the formwork 9 under the floor structure.

[0025] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fixing device for preventing a hollow membrane shell from floating, characterized in that: It includes an inner screw, a movable clamping assembly, a joint nut, an outer screw, a limiting rod, a mountain-shaped clip and a fastening nut. One end of the inner screw is connected to the steel bar in the floor structure, and the other end passes through the hollow membrane shell and is threadedly connected to the joint nut. The movable clamping assembly is movably arranged on both sides of the hollow membrane shell. The outer screw passes through the template in the floor structure and is detachably connected to the inner screw through the joint nut. The limiting rod abuts against the wooden square in the floor structure through the mountain-shaped clip, and the wooden square is crimped to the template. The mountain-shaped clip is threadedly connected to the outer screw. There are multiple groups of fastening nuts, which are respectively threadedly connected to the inner screw and the outer screw.

2. A fixing device for preventing a hollow membrane shell from floating according to claim 1, characterized in that: The movable clamping assembly comprises a fixed limiting plate and a movable limiting plate which are correspondingly arranged on both sides of the hollow membrane shell, the fixed limiting plate is fixedly connected to the inner screw, and the movable limiting plate is pressed into contact with the hollow membrane shell through the fastening nut.

3. A fixing device for preventing a hollow membrane shell from floating according to claim 2, characterized in that Anti-loosening washers are installed on one side of the fixed limiting plate and the movable limiting plate close to the nut.

4. A fixing device for preventing a hollow membrane shell from floating according to claim 3, characterized in that: The fixed limiting plate and the movable limiting plate are both provided with sealing pads on one side close to the hollow membrane shell.

5. A fixing device for preventing a hollow membrane shell from floating according to claim 4, characterized in that: The joint nut is a conical nut, and a large diameter surface of the conical nut abuts against the template.

6. A fixing device for preventing a hollow membrane shell from floating according to claim 5, characterized in that: A sealing gasket is also installed between the joint nut and the template.

7. A fixing device for preventing a hollow membrane shell from floating according to claim 6, characterized in that: The mountain-shaped clamp includes a main body and movable parts symmetrically arranged on both sides of the main body. The main body is provided with an internal threaded through hole adapted to the external screw. Extension parts are fixedly connected to both sides of the main body. The movable part is provided with a sleeve part matching the extension part. The sleeve part is detachably connected to the main body through a fastener.

8. The fixing device for preventing the hollow membrane shell from floating according to claim 6, characterized in that: The mountain-shaped clamp comprises a body and rotating parts symmetrically arranged on both sides of the body, the body is provided with an internal threaded through hole adapted to the external screw, and the rotating parts are rotatably connected to the body via hinged parts.

9. A fixing device for preventing a hollow membrane shell from floating according to any one of claims 7 or 8, characterized in that: The mountain-shaped card has a plurality of groups of arc-shaped grooves, and a wear-resistant layer is arranged in the grooves.

10. A method for installing a fixing device for preventing a hollow membrane shell from floating, characterized in that: The steps of installing the fixing device for preventing the hollow membrane shell from floating as described in claim 9 are: Step 1: Set up the timber system before construction, and weld the inner screws and the limit plates in advance; Step 2: The template is provided with a through hole adapted to the external screw, and the template is fixed on the wooden square system. After the external screw passes through the template, it is threadedly connected with the joint nut; Step 3: Set up multiple sets of limit rods under the wooden system, and fix the limit rods with mountain-shaped clamps. and using a plurality of sets of fastening nuts to reinforce the mountain-shaped clamp; Step 4: Tie up the steel bars at the bottom of the hollow floor structure, then thread the inner screw rod and the joint nut, fix them on the formwork, and then place the hollow membrane shell on the fixed limit plate; Step 5: adjust the length of the inner screw according to the height of the hollow membrane shell, connect the movable limit plate to the inner screw, and tighten it with a fastening nut to complete the fixation of the hollow membrane shell; Step 6: Tie up the upper steel bars in the hollow floor structure, pour concrete, wait for the concrete to solidify, and remove the fastening nuts, mountain clips, external screws and the wooden system supporting the formwork under the floor structure.

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