Prestressed prefabricated external wall panel

Abstract

A mold outer frame comprises transverse frames and longitudinal frames, the two sets of transverse frames and the two sets of longitudinal frames are combined to form a rectangle, and longitudinal ordinary steel bars and longitudinal prestressed steel bars are the same in direction. The longitudinal ordinary steel bars and the longitudinal prestressed steel bars are fixedly connected with the transverse ordinary steel bars in the vertical direction, and the longitudinal prestressed steel bars penetrate through the transverse frame and are fixed to the outer side of the mold outer frame through prestressed steel bar clamping pieces. Through the arrangement of the longitudinal prestressed steel bars, pressure is applied in advance before the structure bears load, so that the structure generates pressure stress by internal force of concrete in a tensile area before the external load acts, the tensile stress generated by the external load is counteracted or reduced, the wallboard structure is more stable under the condition of normal use, and the service life of the wallboard structure is prolonged. Compared with a traditional prefabricated concrete outer wall hanging plate with the large thickness, the prefabricated outer wall plate is not prone to generating cracks or cracks later under the normal use condition.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated exterior wall panels, in particular to a prestressed prefabricated exterior wall panel. Background Art

[0002] In prefabricated buildings, prefabricated exterior wall panels are produced in the factory and then transported to the construction site for assembly. The prefabricated exterior wall panels should have sufficient bearing capacity, rigidity and the ability to adapt to the deformation of the main structure. They should be safe under adverse combinations such as gravity load, wind load, earthquake action, temperature action and the influence of deformation of the main structure.

[0003] In the existing prefabricated exterior wall panels, when the exterior wall panels are subjected to loads, if their own structure cannot offset or reduce the tensile stress generated by the external load, the exterior wall panels are prone to cracks, posing a safety hazard. In order to ensure the stability of the exterior wall panel structure, the produced exterior wall panels are thicker and have a limited span. Utility Model Content

[0004] The purpose of the present utility model is to provide a prestressed prefabricated exterior wall panel to solve the problem that the prefabricated exterior wall panel of the above prior art proposed in the above background technology is prone to cracks when the exterior wall panel is subjected to load and causes safety hazards if its own structure cannot offset or reduce the tensile stress generated by the external load. In order to ensure the stability of the exterior wall panel structure, the produced exterior wall panel is thicker and has a limited span.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a prestressed prefabricated exterior wall panel, comprising a mold outer frame, longitudinal ordinary steel bars and transverse ordinary steel bars, and also longitudinal prestressed steel bars. The mold outer frame comprises a transverse frame and a longitudinal frame, and the two groups of transverse frames and the two groups of longitudinal frames are combined into a rectangle. The longitudinal ordinary steel bars and the longitudinal prestressed steel bars have the same direction. The longitudinal ordinary steel bars and the longitudinal prestressed steel bars are fixedly connected to the transverse ordinary steel bars in the vertical direction. The longitudinal prestressed steel bars pass through the transverse frame and are fixed on the outside of the mold outer frame by prestressed steel bar clamps.

[0006] Preferably, the longitudinal ordinary steel bars and the longitudinal prestressed steel bars are distributed in a transversely spaced manner within the outer frame of the mold.

[0007] Preferably, the interior of the mold outer frame comprises an outer leaf wall, an insulation layer and an inner leaf wall from bottom to top, and both the outer leaf wall and the inner leaf wall are provided with an integral structure of longitudinal ordinary steel bars, longitudinal prestressed steel bars and transverse ordinary steel bars.

[0008] Preferably, the inner leaf wall is further provided with inner leaf wall rib stirrups, and the inner leaf wall rib stirrups of the inner leaf wall are fixedly connected to the overall structure of the longitudinal ordinary steel bars, the longitudinal prestressed steel bars and the transverse ordinary steel bars.

[0009] Preferably, thermal insulation anchors are installed between the outer leaf wall, the thermal insulation layer and the inner leaf wall, and the thermal insulation anchors are distributed in a matrix on the surface of the thermal insulation layer.

[0010] Preferably, a transverse puller of the mold outer frame is fixed between the two groups of longitudinal frames, and the transverse puller of the mold outer frame includes a fixing seat, a connecting rod and a positioning nut. The fixing seat is provided in two groups on the outside of the longitudinal frame respectively, and one end of the connecting rod abuts against the inner side of one group of fixing seats; the other end of the connecting rod passes through the other group of fixing seats, and the positioning nut is fixed on the connecting rod on the outside of the fixing seat.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The present invention uses longitudinal prestressed steel bars to tighten and secure all longitudinal prestressed steel bars before pouring concrete to generate prestress. Compared to traditional processes, longitudinal prestressed steel bars are used here to replace some of the longitudinal ordinary steel bars. By applying pressure before the wall panel structure is subjected to load, the internal force of the concrete in the tensile zone of the wall panel structure under the action of external loads generates compressive stress, thereby offsetting or reducing the tensile stress generated by the external load, making the wall panel structure more stable under normal use and less likely to crack or crack later. Since the prestressed exterior wall panel has a stronger load-bearing capacity than ordinary exterior wall panels of the same specifications and thickness, in actual applications, the prestressed exterior wall panel can reduce the thickness of the wall panel, ensuring the stability of the wall panel structure while minimizing the use of materials and achieving sustainable environmental protection; or it can achieve a larger span under the same thickness, increasing the application range of the exterior wall panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the prestressed prefabricated exterior wall panel of the present utility model.

[0014] Figure 2 This is a schematic diagram of the distribution of the outer leaf wall and inner leaf wall of the utility model.

[0015] Figure 3 This is a schematic diagram of the inner leaf wall structure of the present utility model.

[0016] Figure 4 This is a schematic diagram of the outer leaf wall structure of the present utility model.

[0017] Figure 5 This is a schematic diagram of the longitudinal prestressed steel bar structure of the present utility model.

[0018] Figure 6 This is a schematic diagram of the horizontal pull structure of the mold outer frame of the present utility model.

[0019] In the figure: 1. Mould outer frame; 11. Horizontal frame; 12. Vertical frame; 2. Outer leaf wall; 3. Inner leaf wall; 31. Inner leaf wall rib stirrups; 41. Longitudinal ordinary steel bars; 42. Longitudinal prestressed steel bars; 421. Prestressed steel bar clamps; 43. Horizontal ordinary steel bars; 5. Insulation layer; 6. Insulation anchors; 7. Horizontal tie bars of mould outer frame; 71. Fixing seat; 72. Connecting rod; 73. Positioning nut. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] An embodiment provided by the present invention: Figure 1 As shown, a prestressed prefabricated exterior wall panel includes a mold frame 1, an outer leaf wall 2, an inner leaf wall 3, longitudinal ordinary steel bars 41, longitudinal prestressed steel bars 42 and transverse ordinary steel bars 43, an insulation layer 5, an insulation tie 6 and a mold frame transverse tie 7.

[0022] like Figure 1 As shown, the mold outer frame 1 includes a horizontal frame 11 and a vertical frame 12. Two sets of horizontal frames 11 and two sets of vertical frames 12 are combined into a rectangle. The horizontal frames 11 and the vertical frames 12 are assembled into the mold outer frame 1 and concrete pouring operations are performed separately.

[0023] like Figure 2 As shown, the interior of the mold outer frame 1 is composed of the outer leaf wall 2, the insulation layer 5 and the inner leaf wall 3 from bottom to top. Figure 3 and Figure 4 As shown, the outer leaf wall 2 and the inner leaf wall 3 are both provided with an integral structure of longitudinal common steel bars 41, longitudinal prestressed steel bars 42 and transverse common steel bars 43. The longitudinal common steel bars 41 and the longitudinal prestressed steel bars 42 are in the same direction, and the longitudinal common steel bars 41 and the longitudinal prestressed steel bars 42 are fixedly connected to the transverse common steel bars 43 in the vertical direction. Figure 5As shown, the longitudinal prestressed steel bars 42 pass through the transverse frame 11 and are fixed on the outside of the mold outer frame 1 by prestressed steel bar clamps 421. Before pouring concrete, all longitudinal prestressed steel bars 42 are tightened and fixed to generate prestress. Compared with traditional processes, the longitudinal prestressed steel bars 42 are used here to replace some of the longitudinal ordinary steel bars 41. By pre-applying pressure before the wall panel structure is subjected to load, the internal force of the concrete in the tensile zone of the wall panel structure under the action of external load generates compressive stress, thereby offsetting or reducing the tensile stress generated by the external load. This makes the wall panel structure more stable under normal use and less likely to crack, or cracks occur later.

[0024] Since the prestressed exterior wall panels have a stronger load-bearing capacity than ordinary exterior wall panels of the same specifications and thickness, in practical applications, the prestressed exterior wall panels can reduce the thickness of the wall panels, ensure the stability of the wall panel structure, minimize the use of materials, and achieve sustainable environmental protection; or achieve a larger span with the same thickness, thereby increasing the scope of application of the exterior wall panels.

[0025] like Figure 3 and Figure 4 As shown, the longitudinal common steel bars 41 and the longitudinal prestressed steel bars 42 are spaced apart and distributed transversely in the mold outer frame 1, so that the bearing force of each part of the wall panel is uniform.

[0026] like Figure 3 As shown, the inner wall 3 is also equipped with inner wall rib stirrups 31. These stirrups are fixedly connected to the overall structure of the longitudinal common steel bars 41, longitudinal prestressed steel bars 42, and transverse common steel bars 43. The stirrups 31 extending transversely along the inner wall 3 are known as inner wall transverse ribs, while the stirrups 31 extending longitudinally along the inner wall 3 are known as inner wall longitudinal ribs. The longitudinal and transverse ribs are distributed along the edges of the inner wall 3, enhancing crack resistance at the edges of each exterior wall panel.

[0027] like Figure 1 As shown, insulation anchors 6 are installed between the outer leaf wall 2, the insulation layer 5, and the inner leaf wall 3. The insulation anchors 6 are distributed in a matrix on the surface of the insulation layer 5. The multiple groups of insulation anchors 6 strengthen the connection between the outer leaf wall 2, the insulation layer 5, and the inner leaf wall 3.

[0028] like Figure 6As shown, a mold outer frame transverse pull member 7 is fixed between the two sets of longitudinal frames 12. The mold outer frame transverse pull member 7 includes a fixing seat 71, a connecting rod 72, and a positioning nut 73. Two sets of fixing seats 71 are provided, one on the outside of the longitudinal frame 12, with one end of the connecting rod 72 abutting the inside of one set of fixing seats 71; the other end of the connecting rod 72 passes through the other set of fixing seats 71, and a positioning nut 73 is fixed to the connecting rod 72 on the outside of the fixing seat 71. Before pouring concrete for the outer leaf wall 2 and the inner leaf wall 3, the distance between the two sets of longitudinal frames 12 must be limited. The positioning nut 73 on the connecting rod 72 is rotated to control the distance between the two sets of fixing seats 71 to ensure uniform dimensions between the longitudinal frames 12. This operation can prevent concrete from squeezing the longitudinal frames 12 and causing them to deform, thereby improving the accuracy of the dimensions and specifications of the cast exterior wall panels, improving the quality of mass production of exterior wall panels, and reducing production errors.

[0029] The above are only embodiments of the present invention, and common knowledge such as the specific structures and characteristics of the scheme are not described in detail here. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claim involved.

Claims

1. A prestressed prefabricated exterior wall panel, comprising a mold frame (1), longitudinal ordinary steel bars (41) and transverse ordinary steel bars (43), characterized in that: The mold outer frame (1) further comprises a longitudinal prestressed steel bar (42). The mold outer frame (1) comprises a transverse frame (11) and a longitudinal frame (12). The two groups of transverse frames (11) and the two groups of longitudinal frames (12) are combined into a rectangle. The longitudinal common steel bars (41) and the longitudinal prestressed steel bars (42) have the same direction. The longitudinal common steel bars (41) and the longitudinal prestressed steel bars (42) are both fixedly connected to the transverse common steel bars (43) in the vertical direction. The longitudinal prestressed steel bars (42) pass through the transverse frame (11) and are fixed on the outside of the mold outer frame (1) by a prestressed steel bar clamp (421).

2. The prestressed prefabricated exterior wall panel according to claim 1, characterized in that: The longitudinal common steel bars (41) and the longitudinal prestressed steel bars (42) are distributed in a transversely spaced manner within the mold outer frame (1).

3. The prestressed prefabricated exterior wall panel according to claim 1, characterized in that: The interior of the mold outer frame (1) comprises, from bottom to top, an outer leaf wall (2), an insulation layer (5), and an inner leaf wall (3); the outer leaf wall (2) and the inner leaf wall (3) are both provided with an integral structure of longitudinal common steel bars (41), longitudinal prestressed steel bars (42), and transverse common steel bars (43).

4. The prestressed prefabricated exterior wall panel according to claim 3, characterized in that: The inner leaf wall (3) is further provided with inner leaf wall rib stirrups (31), and the inner leaf wall rib stirrups (31) of the inner leaf wall (3) are fixedly connected to the overall structure of the longitudinal common steel bars (41), the longitudinal prestressed steel bars (42) and the transverse common steel bars (43).

5. The prestressed prefabricated exterior wall panel according to claim 3, characterized in that: Thermal insulation tie pieces (6) are installed through the outer leaf wall (2), the thermal insulation layer (5) and the inner leaf wall (3), and the thermal insulation tie pieces (6) are distributed in a matrix on the surface of the thermal insulation layer (5).

6. The prestressed prefabricated exterior wall panel according to claim 1, characterized in that: A mold outer frame transverse pull piece (7) is fixed between the two groups of longitudinal frames (12), and the mold outer frame transverse pull piece (7) includes a fixing seat (71), a connecting rod (72) and a positioning nut (73). The fixing seat (71) is provided with two groups respectively on the outside of the longitudinal frame (12), one end of the connecting rod (72) abuts against the inside of one group of fixing seats (71); the other end of the connecting rod (72) passes through the other group of fixing seats (71), and the positioning nut (73) is fixed on the connecting rod (72) outside the fixing seat (71).

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