Assembly type composite floor slab cast-in-place belt shaping hanging formwork device

Abstract

The utility model provides an assembly type composite floor slab cast-in-place belt shaping hanging formwork device. The assembly type composite floor slab cast-in-place belt shaping hanging formwork device comprises a bottom formwork. The hanging bracket is located above the bottom formwork and is connected with the bottom formwork and a prefabricated floor slab through a first screw rod and a second screw rod respectively; the first sleeve is arranged outside the first screw in a sleeving mode, and the two ends of the first sleeve abut against the bottom formwork and the hanging bracket correspondingly; and the second sleeve is arranged outside the second screw in a sleeving mode, and the two ends of the second sleeve abut against the prefabricated floor slab and the hanging bracket correspondingly. According to the formwork hanging device, the situation that a vertical rod is supported below a prefabricated floor slab to support a formwork can be avoided, time and labor are saved, assembly and disassembly are convenient, and stability is high; in addition, the first sleeve and the second sleeve can be cut out on site according to different construction requirements, other structures can be prefabricated in a finalization mode and used in a turnover mode, and the construction cost is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a prefabricated formwork device for cast-in-place strips of assembled composite floor slabs. Background Technology

[0002] Prefabricated construction is one of the important directions for the development of building structures in my country. Compared with cast-in-place structures, prefabricated buildings reduce the amount of concrete poured on-site by about 30%, and have the characteristics of energy saving and environmental protection. Composite slabs are made by stacking precast floor slabs and cast-in-place layers. There is a cast-in-place concrete strip about 30cm wide at the joint between adjacent precast floor slabs, which connects the two precast floor slabs into a whole. The biggest quality control point and potential hidden danger point in prefabricated buildings is at this cast-in-place concrete strip.

[0003] Currently, at the joint of concrete slab strips, it is usually necessary to support the formwork from the bottom with uprights, which is time-consuming and labor-intensive. How to install the slab strip formwork efficiently and with high quality is an urgent problem to be solved. Utility Model Content

[0004] The purpose of this utility model is to provide a prefabricated hanging formwork device for cast-in-place strips of assembled composite floor slabs to solve the problems mentioned above.

[0005] The technical solution adopted in this utility model is: a modular formwork device for prefabricated composite floor slab cast-in-place strips, comprising:

[0006] Base template;

[0007] A hanger, located above the bottom formwork, connects the bottom formwork and the precast floor slab via a first screw and a second screw, respectively;

[0008] The first sleeve is fitted over the first screw, with its two ends abutting against the bottom template and the hanger, respectively.

[0009] The second sleeve is fitted over the second screw, with its two ends abutting against the precast floor slab and the hanger, respectively.

[0010] Furthermore, the first sleeve is provided in two sets, and a second sleeve is provided on the opposite side of the two sets of first sleeves, the second sleeve being shorter than the first sleeve.

[0011] Furthermore, each group of first sleeves has several units evenly distributed along the length direction of the bottom template, and each group of second sleeves has several units evenly distributed along the length direction of the bottom template.

[0012] Furthermore, the top surface of the bottom template is provided with a sealing gasket, which extends along the length of the bottom template, and one set is provided below each of the two sets of the second sleeve.

[0013] Furthermore, the hanger includes a first hanger beam and a second hanger beam that are connected in an alternating manner. The first hanger beam and the second hanger beam extend along the length direction and the width direction of the bottom template, respectively. The first screw and the second screw are disposed through the second hanger beam.

[0014] Furthermore, the bottom of the second lifting beam is provided with a first nut and a second nut, which are respectively fitted onto the first screw and the second screw.

[0015] Furthermore, a third nut is provided at the bottom of the bottom template, and the third nut is sleeved on the first screw.

[0016] Furthermore, the first lifting beam has a tapered pin and a pin groove at both ends, and the pin groove is adapted to the shape of the tapered pin; the outer diameter of the tapered pin gradually decreases along the direction away from the first lifting beam.

[0017] The beneficial effects of this utility model are as follows: the formwork device provided by this utility model can avoid the need to support the formwork with uprights under the precast floor slab, saving time and effort, and is easy to install and dismantle with high stability; the first sleeve and the second sleeve can also be cut on site according to different construction needs, while other structures can be prefabricated in a standardized manner and reused, greatly reducing construction costs. Attached Figure Description

[0018] Figure 1 This is a perspective structural diagram of an embodiment of the present utility model;

[0019] Figure 2 This is a front view of an embodiment of the present utility model;

[0020] Figure 3 This is a three-dimensional structural diagram of the hanger in an embodiment of this utility model.

[0021] In the picture:

[0022] 1. Base template;

[0023] 2. Hanger; 21. First hanging beam; 22. Second hanging beam; 23. Tapered pin; 24. Pin groove;

[0024] 3. First screw;

[0025] 4. Second screw;

[0026] 5. First sleeve;

[0027] 6. Second sleeve;

[0028] 7. First nut;

[0029] 8. Second nut;

[0030] 9. The third nut;

[0031] 10. Precast floor slabs;

[0032] 11. Sealing gasket;

[0033] 12. Cast-in-place layer;

[0034] 13. Annular gasket. Detailed Implementation

[0035] The technical solutions of the embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0036] In the description of the embodiments of this utility model, it should be understood that the terms "top," "bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, it should be noted that unless otherwise expressly specified and limited, the terms "set" and "connected" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two elements. Those skilled in the art can understand the specific meaning of the above terms in this utility model through specific circumstances.

[0037] Reference Appendix Figure 1-3 A modular formwork device for cast-in-place concrete strips of assembled composite floor slabs includes: a bottom formwork 1, a hanger 2, a first screw 3, a second screw 4, a first sleeve 5, a second sleeve 6, a first nut 7, a second nut 8, and a third nut 9. The hanger 2 and the bottom formwork 1 are arranged opposite each other. The hanger 2 is located above the bottom formwork 1 and is connected to the bottom formwork 1 and the precast floor slab 10 by the first screw 3 and the second screw 4 respectively. The outer walls of the first screw 3 and the second screw 4 are threaded. The first nut 7 and the second nut 8 are located at the top of the hanger 2 and are respectively sleeved on the first screw 3 and the second screw 4 to fix the first screw 3 and the second screw 4 to the hanger 2. The third nut 9 is located at the bottom of the bottom formwork 1 and is sleeved on the first screw 3 to fix the first screw 3 to the bottom formwork 1. The first sleeve 5 is sleeved on the outside of the first screw 3 and its two ends abut against the bottom formwork 1 and the hanger 2 respectively. The second sleeve 6 is sleeved on the outside of the second screw 4 and its two ends abut against the precast floor slab 10 and the hanger 2 respectively.

[0038] The aforementioned device is installed at the joint of adjacent precast floor slabs 10. The hanger 2 is stably supported on the precast floor slab 10 using the second screw 4, the second sleeve 6, and the second nut 8. The bottom formwork 1 seals the gap between the two precast floor slabs 10 from the bottom. Then, the hanger 2 and the bottom formwork 1 are stably connected using the first screw 3, the first sleeve 5, the first nut 7, and the third nut 9, completing the support of the cast-in-place formwork at the joint of adjacent precast floor slabs 10. Using the above device and construction method improves the efficiency of formwork support and overall construction efficiency. Furthermore, the device uses the precast floor slab 10 as the main load-bearing structure, resulting in good stability and high-quality casting.

[0039] After the cast-in-place strip at the joint and the cast-in-place layer 12 of the floor slab are poured, the device can be removed. Except for the first sleeve 5 and the second sleeve 6, the structure can be easily disassembled. The first sleeve 5 and the second sleeve 6 can be constructed with plastic material in advance. After the other structures are removed, the first sleeve 5 and the second sleeve 6 can be removed with a removal tool. The cleaning difficulty is also relatively small. After removal, the holes are sealed with mortar. For parts that require waterproofing, they can be sealed with waterproof materials such as polyurethane.

[0040] In actual use, annular washers 13 (or annular blocks) can be added between the first nut 7 and the hanger 2, between the second nut 8 and the hanger 2, and between the third nut 9 and the bottom template 1, as needed, to increase the connection stability.

[0041] In this embodiment, the hanger 2 includes a first hanger beam 21 and a second hanger beam 22 that are connected in an alternating manner. A first screw rod 3 and a second screw rod 4 are respectively installed through the second hanger beam 22. The distribution of the first hanger beam 21 and the second hanger beam 22 can be configured according to actual usage requirements. For example, as in this embodiment, there can be two sets of first hanger beams 21 and second hanger beams 22. The first hanger beam 21 and the second hanger beam 22 extend along the length and width directions of the bottom template 1, respectively, and are connected in a grid shape to improve the stability of the support.

[0042] In addition, tapered pins 23 and pin grooves 24 can be respectively provided at both ends of the first lifting beam 21, with the pin grooves 24 matching the shape of the tapered pins 23; the outer diameter of the tapered pins 23 gradually decreases along the direction away from the first lifting beam 21. When the length of the hanger 2 is insufficient, the number of hangers 2 can be increased, and the tapered pins 23 on one set of hangers 2 can be inserted into the pin grooves 24 in another set of hangers 2 to extend the total length of the hanger 2.

[0043] Both the first lifting beam 21 and the second lifting beam 22 can be made of square steel commonly used in construction. Since the square steel itself is hollow inside, the work of digging the pin groove 24 can be eliminated. Only the tapered pin 23 needs to be welded to the other end of the square steel, which reduces the difficulty of manufacturing.

[0044] In this embodiment, along the width direction of the bottom template 1, two sets of first sleeves 5 are provided, and a set of second sleeves 6 is provided on the opposite side of the two sets of first sleeves 5. Along the length direction of the bottom template 1, several first sleeves 5 are evenly distributed in each set, and several second sleeves 6 are evenly distributed in each set. A first screw 3 and a second screw 4 are respectively inserted into each set of first sleeves 5 and second sleeves 6. The support stability of this device can be changed by adjusting the number of screws.

[0045] The second sleeve 6 is shorter than the first sleeve 5. This is because the bottom end of the second sleeve 6 is used to abut against the precast floor slab 10 and the bottom formwork 1. In the installed formwork device, the top surface of the bottom formwork 1 should be flush with the bottom surface of the precast floor slab 10.

[0046] In addition, to improve the pouring quality and prevent grout overflow, this embodiment also provides a sealing gasket 11 on the top surface of the bottom formwork 1. The sealing gasket 11 extends along the length of the bottom formwork 1, and one set is provided below each of the two sets of second sleeves 6, which are used to seal the gap between the top surface of the bottom formwork 1 and the bottom surface of the precast floor slab 10.

[0047] When using this device for construction, not only can the first screw 3 and the second screw 4 be used to fix the hanger 2 and the bottom formwork 1, but the second screw 4 and the second sleeve 6 can also be used to adjust the distance between the hanger 2 and the precast floor slab 10, and the first screw 3 and the first sleeve 5 can be used to adjust the distance between the hanger 2 and the bottom formwork 1 to adapt to different construction needs. Since the first sleeve and the second sleeve need to be removed after pouring, they are consumables. Therefore, they can be cut on site according to the different thicknesses of the precast floor slab 10 and the cast-in-place layer 12. After the first screw 3 and the second screw 4 are installed, the first nut 7, the second nut 8 and the third nut 9 can be tightened in different positions.

[0048] Compared with the prior art, the beneficial effects of this utility model are as follows: the formwork device provided by this utility model can avoid supporting the formwork with uprights under the precast floor slab 10, saving time and effort, and is easy to install and dismantle with high stability; the first sleeve and the second sleeve can also be cut on site according to different construction needs, while other structures can be prefabricated in a standardized manner and reused, greatly reducing construction costs.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0050] The above are preferred embodiments of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A modular formwork device for prefabricated composite floor slab cast-in-place strips, characterized in that, include: Base template; A hanger, located above the bottom formwork, connects the bottom formwork and the precast floor slab via a first screw and a second screw, respectively; The first sleeve is fitted over the first screw, with its two ends abutting against the bottom template and the hanger, respectively. The second sleeve is fitted over the second screw, with its two ends abutting against the precast floor slab and the hanger, respectively.

2. The prefabricated formwork device for cast-in-place strips of assembled composite floor slabs according to claim 1, characterized in that, The first sleeve is provided in two sets, and a second sleeve is provided on the opposite side of the two sets of first sleeves. The second sleeve is shorter than the first sleeve.

3. The prefabricated formwork device for cast-in-place strips of assembled composite floor slabs according to claim 2, characterized in that, Each group has several first sleeves evenly distributed along the length of the bottom template, and each group has several second sleeves evenly distributed along the length of the bottom template.

4. The prefabricated formwork device for cast-in-place composite floor slabs according to any one of claims 1-3, characterized in that, The top surface of the bottom template is provided with a sealing gasket, which extends along the length of the bottom template, with one set below each of the two sets of the second sleeve.

5. The prefabricated formwork device for cast-in-place strips of assembled composite floor slabs according to claim 4, characterized in that, The hanger includes a first hanger beam and a second hanger beam that are connected in an alternating manner. The first hanger beam and the second hanger beam extend along the length direction and the width direction of the bottom template, respectively. The first screw and the second screw are disposed through the second hanger beam.

6. The prefabricated formwork device for cast-in-place strips of assembled composite floor slabs according to claim 5, characterized in that, The bottom of the second lifting beam is provided with a first nut and a second nut, which are respectively fitted onto the first screw and the second screw.

7. The prefabricated formwork device for cast-in-place composite floor slabs according to claim 6, characterized in that, The bottom of the bottom template is provided with a third nut, which is sleeved on the first screw.

8. The prefabricated formwork device for cast-in-place composite floor slabs according to any one of claims 5-7, characterized in that, The first lifting beam has a tapered pin and a pin groove at both ends, and the pin groove is adapted to the shape of the tapered pin; the outer diameter of the tapered pin gradually decreases along the direction away from the first lifting beam.

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