Tension fastening device for plain concrete formwork and construction method thereof

Abstract

The present invention relates to a tensioning and fastening device for a plain concrete formwork and a construction method thereof, comprising: a screw rod which is inserted from a back rib assembly on a pair of concrete formworks to be tensioned and fastened, with both ends of the screw rod extending out of the pair of concrete formworks to form an exposed section; a tightening assembly which is sleeved on the exposed section and abuts against the side of the back rib assembly away from the concrete formwork, with a slot formed in the end of the tightening assembly away from the back rib assembly; a plurality of tightening plates in an arc shape with one end small and the other end large; a ring sleeved outside the plurality of tightening plates, through which the plurality of tightening plates are enclosed to form a conical sleeve structure, the sleeve structure is sleeved and threadedly connected to the exposed section and inserted into the slot, and the sleeve structure partially extends out of the slot to form an abutting end; a locking piece sleeved on the exposed section and the abutting end. The present application can well solve the problem that screw rods made of other materials such as glass fiber are prone to slipping, resulting in failure of the overall reinforcement system of the formwork and deformation of the formwork due to expansion.

Description

Technical Field

[0001] The invention relates to the technical field of construction, in particular to a tensioning and fastening device for a plain concrete formwork and a construction method thereof. Background Art

[0002] In the field of construction engineering formwork reinforcement, plain water screws are usually used to reinforce cast-in-place plain water concrete vertical structures such as wall formwork groups. For some colored plain water concrete projects with special concrete surface color requirements, conventional metal plain water screws cannot be used due to their color and rust risk, and screws of other materials (such as fiberglass screws, etc.) must be used. This type of material screw is difficult to process and is prone to thread slippage. After being subjected to the side pressure of concrete, the nut on the screw will slip, causing the overall reinforcement system of the formwork to fail, and then causing the problem of formwork expansion and deformation. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a tensioning and fastening device for a plain concrete formwork and a construction method thereof, so as to solve the problem that screws made of other materials such as fiberglass are prone to thread slippage, resulting in failure of the overall reinforcement system of the formwork and deformation of the formwork.

[0004] To achieve the above object, the present invention provides a tensioning and fastening device for a plain concrete formwork, wherein a plurality of back rib components are arranged at intervals on the outer side of the concrete formwork, and the tensioning and fastening device comprises:

[0005] A screw rod is passed through the back rib assembly and arranged on the pair of concrete formworks to be tightened and tensioned, and both ends of the screw rod extend out of the pair of concrete formworks to form exposed sections;

[0006] A tightening component is sleeved on the exposed section and abuts against the side of the back rib component away from the concrete formwork, wherein a slot is formed in one end of the tightening component away from the back rib component, and the slot is in a conical shape with a smaller end close to the back rib component and a larger end away from the back rib component;

[0007] A plurality of tightening pieces in an arc shape with one end being small and the other end being large;

[0008] A ring sleeved outside the plurality of tightening pieces, the ring being capable of contraction and expansion, and the plurality of tightening pieces being enclosed by the ring to form a conical sleeve structure, the sleeve structure being sleeved and threadedly connected to the exposed section and inserted into the slot, the sleeve structure partially extending out of the slot to form an abutment end;

[0009] A locking piece is sleeved on the exposed section and the abutting end, and the locking piece is threadedly connected to the abutting assembly, so that the sleeve structure is abutted in the slot, so that the plurality of tightening sheets are folded and tightly embraced on the exposed section.

[0010] The present invention uses a ring to enclose a plurality of tightening plates to form a conical sleeve structure, the sleeve structure is inserted into the slot of the tightening component, the locking piece is sleeved on the exposed section and the abutting end and is threadedly connected to the tightening component, as the threaded connection portion of the tightening component and the locking piece continues to grow, the sleeve structure is more deeply pressed against the smaller end of the slot, so that the plurality of tightening plates are continuously contracted to hold the exposed section, and the ring also shrinks accordingly, so that a mechanical bite force is generated between the sleeve structure and the exposed section, so as to avoid the problem of thread slippage between the sleeve structure and the exposed section.

[0011] A further improvement of the tensioning and fastening device for the plain concrete formwork of the present invention is that the back rib assembly comprises a pair of steel pipes arranged in parallel;

[0012] The clamping assembly comprises a rod sleeved on the exposed section and inserted between the pair of steel pipes, and a clamping member sleeved on and threadedly connected to the rod, wherein the clamping member abuts against the pair of steel pipes.

[0013] A further improvement of the tensioning and fastening device for the fair-faced concrete formwork of the present invention is that the fastening assembly further comprises a docking piece fixed to an end of the rod away from the steel pipe;

[0014] The slot is arranged at an end of the docking member away from the rod member.

[0015] A further improvement of the tensioning and fastening device for the fair-faced concrete formwork of the present invention is that a through hole is provided in the rod along the length direction of the rod;

[0016] The docking piece is provided with a communication hole communicating with the through hole and the slot;

[0017] The exposed section is inserted into the through hole and the communicating hole.

[0018] A further improvement of the tensioning and fastening device for the plain concrete formwork of the present invention is that it also includes a gasket sleeved on the rod and located between the pair of steel pipes and the pressing member.

[0019] A further improvement of the tensioning and fastening device for the plain concrete formwork of the present invention is that one end of the locking member is provided with a receiving groove for accommodating the abutting end and the clamping assembly, the inner wall of the receiving groove is provided with an internal thread and is threadedly connected to one end of the clamping assembly away from the back rib assembly, so that the abutting end can be tightly abutted against the bottom wall of the receiving groove.

[0020] A further improvement of the tensioning and fastening device for the plain concrete formwork of the present invention is that the other end of the locking member is provided with a through hole communicating with the accommodating groove, and the exposed section extends out of the locking member from the through hole.

[0021] A further improvement of the tensioning and fastening device for the plain concrete formwork of the present invention is that a groove section is provided on the outer wall of the tightening plate, and the groove sections of several tightening plates are aligned and connected to an annular installation groove, and the ring is located in the installation groove.

[0022] A further improvement of the tensioning and fastening device for the plain concrete formwork of the present invention is that the ring includes at least two turns of steel wire wound around the outside of the plurality of tightening plates, and the steel wire is elastic.

[0023] The present invention also provides a construction method of the above-mentioned tensioning and fastening device for the plain concrete formwork, comprising the following steps:

[0024] After the concrete formwork and the back rib assembly are constructed, the screw rod is passed through the back rib assembly and installed on the pair of concrete formworks to be tightened, so that both ends of the screw rod extend out of the pair of concrete formworks to form exposed sections;

[0025] The tightening assembly is sleeved on the exposed section and abutted against the side of the back rib assembly away from the concrete formwork;

[0026] The sleeve structure is sleeved and threadedly connected to the exposed section and inserted into the slot, so that the sleeve structure partially extends out of the slot to form an abutment end;

[0027] The locking piece is sleeved on the exposed section and the abutting end, and the locking piece is threadedly connected to the abutting assembly, so that the sleeve structure is abutted in the slot, so that the plurality of tightening plates are folded and clamped on the screw rod, thereby the concrete formwork is pulled and tightened by the abutting assemblies located at both ends of the screw rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a state diagram of the tensioning and fastening device for the plain concrete formwork of the present invention after being installed on the concrete formwork.

[0029] Figure 2 for Figure 1 A partial enlarged schematic diagram of the tensioning and fastening device part.

[0030] Figure 3 The exploded view of the tensioning and fastening device for the plain concrete formwork of the present invention.

[0031] Explanation of symbols: concrete formwork 10, back rib assembly 20, steel pipe 21, screw 30, tightening assembly 40, slot 41, rod 42, pressing member 43, docking member 44, sleeve structure 50, tightening plate 51, groove section 511, ring 52, locking member 60, accommodating groove 61, gasket 70. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] The present invention provides a tensioning and fastening device for a plain concrete formwork and a construction method thereof, which are used for tensioning and fastening a pair of concrete formworks 10. The present invention comprises a screw rod 30, a tightening assembly 40, a tightening sheet 51, a ring 52, and a locking member 60. The ring 52 is used to enclose a plurality of tightening sheets 51 to form a conical sleeve structure 50. The sleeve structure 50 is inserted into a slot 41 of the tightening assembly 40. The locking member 60 is sleeved on the exposed section and the abutting end and is threadedly connected to the tightening assembly 40. As the sleeve structure 50 is continuously pushed into the slot 41, the pointed ends of the plurality of tightening sheets 51 are continuously tightened to generate a strong tightening force with the screw rod 30 to avoid the problem of thread slippage.

[0034] The tensioning and fastening device for a plain concrete formwork and the construction method thereof of the present invention are described below in conjunction with the accompanying drawings.

[0035] See also Figure 1 and Figure 2 In this embodiment, a tensioning and fastening device for a plain concrete formwork is provided. A plurality of back rib components 20 are provided at intervals on the outer side of a concrete formwork 10. The tensioning and fastening device comprises: a screw rod 30 which is passed through the back rib component 20 and is provided on a pair of concrete formworks 10 to be tensioned and fastened. Both ends of the screw rod 30 extend out of the pair of concrete formworks 10 to form an exposed section; a tightening component 40 which is sleeved on the exposed section and abuts against the side of the back rib component 20 away from the concrete formwork 10. A slot 41 is formed in one end of the tightening component 40 away from the back rib component 20. The slot 41 is small near the end of the back rib component 20 and large away from the end of the back rib component 20. Conical shape; a plurality of tightening pieces 51 in an arc shape with one end small and the other end large; a ring 52 sleeved outside the plurality of tightening pieces 51, the ring 52 can shrink and stretch, and the plurality of tightening pieces 51 are enclosed by the ring 52 to form a conical sleeve structure 50, the sleeve structure 50 is sleeved and threadedly connected to the exposed section and inserted into the slot 41, and a portion of the sleeve structure 50 extends out of the slot 41 to form abutment end; a locking piece 60 sleeved on the exposed section and the abutment end, the locking piece 60 is threadedly connected to the tightening assembly 40, so that the sleeve structure 50 is pressed tightly against the slot 41, so that the plurality of tightening pieces 51 are closed and tightly embraced on the exposed section.

[0036] In the present embodiment, the tensioning and fastening device is threadedly connected to the clamping assembly 40 through the locking member 60, so that the sleeve structure 50 can be firmly clamped and fixed between the clamping assembly 40 and the locking member 60, and the sleeve structure 50 is inserted into the conical slot 41, so that the several tightening plates 51 of the sleeve structure 50 are closed and clamped on the exposed section, and the ring 52 is also tightened accordingly, so that a mechanical bite force is generated between the sleeve structure 50 and the exposed section to withstand the tension when the formwork is poured, thereby ensuring that the sleeve structure 50 can be firmly threadedly connected to the exposed section to avoid slipping, so that the clamping assembly 40 can be firmly pressed against the back rib assembly 20 to withstand the lateral pressure generated by the poured concrete on the formwork on both sides. Therefore, the present application can well solve the problem that the screw 30 made of other materials such as fiberglass is prone to slipping, resulting in failure of the overall reinforcement system of the formwork and deformation of the formwork.

[0037] See also Figure 1 and Figure 2 In a specific embodiment, the back rib assembly 20 includes a pair of steel pipes 21 arranged in parallel; the clamping assembly 40 includes a rod 42 sleeved on the exposed section and inserted between the pair of steel pipes 21, and a clamping member 43 sleeved and threadedly connected to the rod 42, and the clamping member 43 is pressed against the pair of steel pipes 21.

[0038] See also Figure 3 Furthermore, the tightening assembly 40 also includes a docking member 44 fixed to an end of the rod 42 away from the steel pipe 21 ; the slot 41 is provided at an end of the docking member 44 away from the rod 42 .

[0039] See also Figure 2 Furthermore, a through hole is provided in the rod 42 along the length direction of the rod 42; a connecting hole connected with the through hole and the slot 41 is provided in the docking member 44; and the exposed section is inserted into the through hole and the connecting hole.

[0040] See also Figure 1 and Figure 2 Preferably, the tensioning and fastening device also includes a gasket 70 which is sleeved on the rod 42 and located between a pair of steel pipes 21 and the clamping member 43. The gasket 70 is added to disperse the concentrated force on the template due to the tension, so as to reduce the deformation of the template.

[0041] See also Figure 2 In a specific embodiment, one end of the locking member 60 is provided with a receiving groove 61 for accommodating the abutting end and the clamping assembly 40. The inner wall of the receiving groove 61 is provided with an internal thread and is threadedly connected to the end of the clamping assembly 40 away from the back rib assembly 20, so that the abutting end can be tightly against the bottom wall of the receiving groove 61.

[0042] See also Figure 2Furthermore, the other end of the locking member 60 is provided with a through hole connected to the accommodating groove 61, and the exposed section extends out of the locking member 60 from the through hole.

[0043] See also Figure 2 In a specific embodiment, a groove section 511 is provided on the outer wall of the tightening plate 51, and the groove sections 511 of several tightening plates 51 are aligned and connected to form an annular mounting groove, and the ring 52 is located in the mounting groove. The mounting groove is provided to limit the ring 52 and prevent the ring 52 from slipping on the sleeve structure 50.

[0044] Preferably, the mounting groove is located at the abutting end.

[0045] See also Figure 2 Furthermore, the ring 52 includes at least two turns of steel wire wound around the plurality of tightening plates 51, and the steel wire is elastic.

[0046] Since the present application adopts an elastic steel wire wound at least twice around the tightening plates 51, the steel wire can shrink and stretch adaptively with the closing and opening of the tightening plates 51, thereby ensuring that the tightening plates 51 are always clamped together by the steel wire.

[0047] The construction process of the tensioning and fastening device for the plain concrete formwork of the present invention is described below.

[0048] See also Figure 1 After the concrete formwork 10 and the back rib assembly 20 are constructed, the screw 30 is inserted from the back rib assembly 20 into the pair of concrete formworks 10 to be tightened, so that the two ends of the screw 30 extend out of the pair of concrete formworks 10 to form an exposed section; the pressing member 43 is sleeved and threadedly connected to the rod 42, the gasket 70 is sleeved on the rod 42, the rod 42 is sleeved on the exposed section and inserted between the pair of steel pipes 21; the sleeve structure 50 is sleeved and threadedly connected to the exposed section and inserted into the slot 41, so that the sleeve The structure 50 partially extends out of the slot 41 to form a resting end; the locking piece 60 is sleeved on the exposed section and the resting end, and the locking piece 60 is threadedly connected to the tightening assembly 40, so that the sleeve structure 50 is tightened in the slot 41, so that the plurality of tightening pieces 51 are folded and tightly embraced on the screw rod 30; the pressing piece 43 is screwed to make the pressing piece 43 push the gasket 70, so that the gasket 70 is pressed against a pair of steel pipes 21, thereby the concrete formwork 10 is tightened by the gasket 70 and the pressing piece 43 located at both ends of the screw rod 30.

[0049] Preferably, in the present application, except for the screw rod 30 which is made of glass fiber screw rod 30 or other materials, the remaining components are made of steel.

[0050] See also Figure 1The present invention also provides a construction method of the tensioning and fastening device for the above-mentioned plain concrete formwork, comprising the following steps:

[0051] After the concrete formwork 10 and the back rib assembly 20 are constructed, the screw rod 30 is passed through the back rib assembly 20 and installed on the pair of concrete formworks 10 to be tightened, so that the two ends of the screw rod 30 extend out of the pair of concrete formworks 10 to form exposed sections;

[0052] The tightening assembly 40 is sleeved on the exposed section and abuts against the side of the back rib assembly 20 away from the concrete formwork 10;

[0053] The sleeve structure 50 is sleeved and threadedly connected to the exposed section and inserted into the slot 41, so that the sleeve structure 50 partially extends out of the slot 41 to form abutment end;

[0054] The locking member 60 is sleeved on the exposed section and the abutting end, and the locking member 60 is threadedly connected to the abutting assembly 40, so that the sleeve structure 50 is abutted in the slot 41, so that the plurality of tightening plates 51 are folded and clamped on the screw rod 30, thereby the concrete formwork 10 is pulled and tightened by the abutting assemblies 40 located at both ends of the screw rod 30.

[0055] In a specific embodiment, the back rib assembly 20 includes a pair of steel pipes 21 arranged in parallel;

[0056] When installing the abutting member, the pressing member 43 is sleeved and threadedly connected to the rod 42, and the rod 42 is sleeved on the exposed section and inserted between the pair of steel pipes 21;

[0057] After the tightening pieces 51 are folded and tightly held on the screw rod 30 , the pressing member 43 is screwed so that the pressing member 43 abuts against the pair of steel pipes 21 .

[0058] Furthermore, when the abutting assembly 40 is installed, the exposed section is sequentially inserted into the through hole of the rod 42 , the connecting hole of the docking member 44 , and the slot 41 of the docking member 44 .

[0059] Furthermore, before the rod 42 is inserted between the pair of steel pipes 21, the gasket 70 is sleeved on the rod 42;

[0060] After the tightening pieces 51 are folded and tightly held on the screw rod 30 , the pressing member 43 is screwed to push the gasket 70 , so that the gasket 70 is pressed against the pair of steel pipes 21 .

[0061] In a specific embodiment, when the locking member 60 is sleeved on the exposed section and the abutting end, the exposed section passes through the receiving groove 61 and the through hole of the locking member 60 in sequence and extends out of the locking member 60;

[0062] When the locking member 60 is threadedly connected to the clamping assembly 40, the internal thread of the accommodating groove 61 is threadedly connected to the end of the clamping assembly 40 away from the back rib assembly 20. As the threaded connection portion of the clamping assembly 40 and the locking member 60 continues to grow, the sleeve structure 50 is tightened in the slot 41, so that the plurality of tightening plates 51 are continuously contracted to hug the exposed section.

[0063] By adopting the above technical solution, the present invention has the following beneficial effects:

[0064] The present invention utilizes the mechanical bite force between the sleeve structure 50 and the exposed section to relatively fix the screw 30 to form a whole, so that slippage and the like will not occur, thereby avoiding the problem of thread slippage of the sleeve structure 50. The clamping member 43 is threadedly connected to the rod 42, so that the clamping member 43 can be moved and adjusted to be tightly pressed against a pair of steel pipes 21 to resist the lateral pressure of the concrete. Under the extrusion of the lateral pressure of the concrete, the force is transmitted to the screw 30 in the order of formwork → back rib → pressing assembly 40 → sleeve structure 50 → screw 30, so that the tensile strength of the screw 30 itself is fully utilized.

[0065] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

Claims

1. A tensioning and fastening device for a plain concrete formwork, wherein a plurality of back rib components are arranged at intervals on the outer side of the concrete formwork, characterized in that: The tensioning and fastening device comprises: A screw rod is passed through the back rib assembly and arranged on the pair of concrete formworks to be tightened and tensioned, and both ends of the screw rod extend out of the pair of concrete formworks to form exposed sections; A tightening component is sleeved on the exposed section and abuts against the side of the back rib component away from the concrete formwork, wherein a slot is formed in one end of the tightening component away from the back rib component, and the slot is in a conical shape with a smaller end close to the back rib component and a larger end away from the back rib component; A plurality of tightening pieces in an arc shape with one end being small and the other end being large; A ring sleeved outside the plurality of tightening pieces, the ring being capable of contraction and expansion, and the plurality of tightening pieces being enclosed by the ring to form a conical sleeve structure, the sleeve structure being sleeved and threadedly connected to the exposed section and inserted into the slot, the sleeve structure partially extending out of the slot to form an abutment end; A locking member sleeved on the exposed section and the abutting end, wherein the locking member is threadedly connected to the abutting assembly so that the sleeve structure abuts against the slot, so that the plurality of tightening sheets are folded and tightly held on the exposed section; The outer wall of the tightening piece is provided with a groove section, and the groove sections of a plurality of the tightening pieces are aligned and connected to an annular mounting groove, and the ring is located in the mounting groove; The ring includes at least two turns of steel wire wound around the plurality of tightening plates, and the steel wire is elastic.

2. The tensioning and fastening device for a plain concrete formwork according to claim 1, characterized in that: The back rib assembly comprises a pair of steel pipes arranged in parallel; The clamping assembly comprises a rod sleeved on the exposed section and inserted between the pair of steel pipes, and a clamping member sleeved on and threadedly connected to the rod, wherein the clamping member abuts against the pair of steel pipes.

3. The tensioning and fastening device for a plain concrete formwork according to claim 2, characterized in that: The tightening assembly also includes a docking piece fixed to an end of the rod away from the steel pipe; The slot is arranged at an end of the docking member away from the rod member.

4. The tensioning and fastening device for a plain concrete formwork according to claim 3, characterized in that: The rod is provided with a through hole along the length direction of the rod; The docking piece is provided with a communication hole communicating with the through hole and the slot; The exposed section is inserted into the through hole and the communicating hole.

5. The tensioning and fastening device for a plain concrete formwork according to claim 2, characterized in that: It also includes a gasket which is sleeved on the rod and located between a pair of the steel pipes and the pressing member.

6. The tensioning and fastening device for a plain concrete formwork according to claim 1, characterized in that: One end of the locking member is provided with a receiving groove for accommodating the abutting end and the clamping assembly. The inner wall of the receiving groove is provided with an internal thread and is threadedly connected to one end of the clamping assembly away from the back rib assembly, so that the abutting end can be tightly against the bottom wall of the receiving groove.

7. The tensioning and fastening device for a plain concrete formwork according to claim 6, characterized in that: The other end of the locking member is provided with a through hole communicating with the accommodating groove, and the exposed section extends out of the locking member from the through hole.

8. A construction method for the tensioning and fastening device for a plain concrete formwork as claimed in claim 1, characterized in that: The steps include: After the concrete formwork and the back rib assembly are constructed, the screw rod is passed through the back rib assembly and installed on the pair of concrete formworks to be tightened, so that both ends of the screw rod extend out of the pair of concrete formworks to form exposed sections; The tightening assembly is sleeved on the exposed section and abutted against the side of the back rib assembly away from the concrete formwork; The sleeve structure is sleeved and threadedly connected to the exposed section and inserted into the slot, so that the sleeve structure partially extends out of the slot to form an abutment end; The locking piece is sleeved on the exposed section and the abutting end, and the locking piece is threadedly connected to the abutting assembly, so that the sleeve structure is abutted in the slot, so that the plurality of tightening plates are folded and clamped on the screw rod, thereby the concrete formwork is pulled and tightened by the abutting assemblies located at both ends of the screw rod.

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