A fixing device for preventing hollow membrane shell from floating and its installation method

Abstract

The present invention belongs to the field of building construction technology, and specifically relates to a fixing device for preventing hollow membrane shells from floating and an installation method thereof, 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. 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 pressed into 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. The beneficial effects of the present invention are: it is suitable for fixing hollow membrane shells of different sizes, saving costs.

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] Hollow-core floor slabs are widely used in modern construction due to their significant advantages, including excellent thermal and sound insulation, and reduced structural weight. However, during the concrete pouring process, lightweight components such as hollow membrane shells are easily affected by buoyancy due to the fluidity of the concrete before initial setting, resulting in inaccurate positioning within the floor slab. This, in turn, affects the overall structural layout and load-bearing performance of the floor slab, and even compromises building safety. While various fixing methods exist in the prior art, they often suffer from complex installation, high costs, or poor fixing effectiveness. Summary of the Invention

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

[0004] To achieve the above-mentioned objectives, 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 formwork 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 pressed against the formwork, 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 card 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, and 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 a fastener.

[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 multiple groups of arc-shaped grooves, and a wear-resistant layer is provided 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:

[0014] 1) Before construction, the timber system should be supported and the internal screws and fixed limit plates should be welded in advance;

[0015] 2) The template is provided with a through hole adapted to the external screw, and the template is fixed to the wooden square system. The external screw passes through the template and is threadedly connected to the joint nut;

[0016] 3) Set up multiple sets of limit rods under the wooden system and fix the limit rods with mountain-shaped clips.

[0017] and using multiple sets of fastening nuts to reinforce the mountain-shaped clamp;

[0018] 4) Tie the steel bars at the bottom of the hollow floor structure, then thread the inner screw and the joint nut together, fix them on the formwork, and then place the hollow membrane shell on the fixed limit plate;

[0019] 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;

[0020] 6) Tie up the upper reinforcement bars in the hollow floor structure, pour concrete, wait for the concrete to solidify, and remove the fastening nuts, mountain clips, external screws and wooden square system supporting the formwork below the floor structure.

[0021] In summary, the present invention has the following advantages and beneficial technical effects:

[0022] 1. The fixed limiting plate and the movable limiting 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 the poured concrete, and ensure construction quality and safety; the movable limiting 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.

[0023] 2. The joint nut in the present invention has a conical shape and is used to match the screw rod, and its conical structure is used to provide additional locking force and loosening effect; the sealing gasket uses its elastic sealing properties 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, the surface of the limiting plate is provided with an anti-slip and friction-enhancing sealing gasket, which can 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 to the formwork support system.

[0024] 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 wooden 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 for fastening the outer screw with the joint nut, the fixed limit plate and the movable limit plate 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 the parts, and save maintenance costs; the anti-loosening washer utilizes the special design of the inner oblique tooth surface 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.

[0025] 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 effect of the nut effectively prevents the floating phenomenon of the hollow membrane shell during the concrete pouring process. The structure is compact, with few parts, and is easy to process and assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

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

[0028] Figure 2 is a perspective schematic diagram of a mountain-shaped card in the first embodiment of the present invention;

[0029] Figure 3 It is a structural diagram of the Zhongshan type card according to the second embodiment of the present invention.

[0030] The reference numerals in the accompanying drawings are:

[0031] 1. Internal screw; 2. Movable clamping assembly; 21. Fixed limit plate; 22. Movable limit plate;

[0032] 3. Connector nut; 4. External screw; 5. Limit rod; 6. Mountain clamp; 61. Main body; 62. Movable part; 63. Rotating part; 64. Groove;

[0033] 7. Tightening nut; 8. Hollow membrane shell; 9. Template; 10. Wooden square. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the implementation of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments 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 embodiments described 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 are intended to be used to explain the present invention, and cannot be understood as limitations on the present invention; based on the embodiments of 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:

[0035] The following is combined with Figure 1-Figure 3 The present invention is described in further detail:

[0036] Example 1

[0037] like Figure 1As shown, this 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 with 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 the wooden square 10 in the floor structure. The upper end face 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 group 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 plate is 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.

[0038] like Figure 1 As shown, wedge-shaped anti-loosening washers are installed between the fixed limiting plate 21 and the joint nut 3, and between the movable limiting plate 22 and the fastening nut 7; rubber sealing gaskets are glued on one side of the fixed limiting plate 21 and the movable limiting plate 22 that are pressed against 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 set between the joint nut 3 and the template 9.

[0039] 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 transverse direction. The movable part 62 is provided with a sleeve part matching the extension part, and the movable part 62 is provided with multiple 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.

[0040] Example 2

[0041] like Figure 3As shown, the difference between this embodiment and the first embodiment is that: the mountain-shaped card 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 steel 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 remaining technical features are the same.

[0042] Example 3

[0043] The present invention provides a method for installing a fixing device for preventing a hollow membrane shell from floating as follows:

[0044] Step 1: Before installation, the fixed limit plate 21 is welded to the inner screw 1 in the processing plant. In addition, the keel-wood beam 10 system of the hollow floor structure is pre-set up at the construction site;

[0045] 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 screw 4 into the joint nut 3, thereby assembling and fixing the external screw 4 to the template 9;

[0046] Step 3: Install two limit rods 5 under the wooden plank 10, use the mountain clamp 6 to clamp and fix the limit rods 5, and use two sets of fastening nuts 7 to reinforce the mountain clamp 6;

[0047] Step 4: Brush the mold release agent on the surface of the formwork 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 to fix the inner screw 1 on the formwork 9, where the axis of the inner screw 1 coincides with the axis of the outer screw 4. Then, place the hollow membrane shell 8 on the fixed limit plate 21 welded to the inner screw 1;

[0048] 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 it with the anti-loosening washer and the fastening nut 7 to complete the fixation of the hollow membrane shell 8;

[0049] 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 clips 6, external screws 4 and wooden squares 10 system supporting the formwork 9 under the floor structure.

[0050] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that modifications may be made to the technical solutions described in the above embodiments, or that some of the technical features may be replaced with equivalents; such modifications or replacements do not deviate from the spirit and scope of the technical solutions of the various 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, 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 pressed against 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; The mountain-shaped clamp includes a body and movable parts symmetrically arranged on both sides of the body, the body is provided with an internal threaded through hole adapted to the external screw, the two sides of the body are fixedly connected with an extension part, the movable part is provided with a sleeve part matching the extension part, and the sleeve part is detachably connected to the body via a fastener; The mountain-shaped clamp may include 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.

2. A fixing device for preventing a hollow membrane shell from floating according to claim 1, characterized in that: 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 against 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 the sides of the fixed limiting plate and the movable limiting plate close to the nut.

4. The 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 gaskets on one side close to the hollow membrane shell.

5. The 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 the large diameter surface of the conical nut abuts against the template.

6. The 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. The fixing device for preventing a hollow membrane shell from floating according to claim 6, characterized in that: The mountain-shaped card has multiple groups of arc-shaped grooves, and a wear-resistant layer is arranged in the grooves.

8. 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 according to claim 7 are: Step 1: Before construction, set up the timber system and pre-weld the fixed inner screws and fixed limit plates; Step 2: The template is provided with a through hole adapted to the external screw, and the template is fixed to the wooden square system. The external screw passes through the template and is threadedly connected to the joint nut; Step 3: Set up multiple sets of limit rods under the wooden system and fix the limit rods with mountain-shaped clips. and using multiple sets of fastening nuts to reinforce the mountain-shaped clamp; Step 4: Tie the steel bars at the bottom of the hollow floor structure, then thread the inner screw into the joint nut, fix it 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 reinforcement bars in the hollow floor structure, pour concrete, wait for the concrete to solidify, and remove the fastening nuts, mountain clips, external screws, and wooden square system supporting the formwork below the floor structure.

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