An integral mold for prefabricated beams cured by electric heating film

Abstract

An integral mold for prefabricated beams cured by electric heating film comprises a bottom plate, side plates, flexible corners, tie rods, horizontal beams, electric heating film, insulation plates and protective plates. The bottom plate and the side plates form a cavity with an upper opening. A flexible corner is provided at the junction of the bottom plate and the side plates. The bottom plate, the flexible corner and the side plates are connected as a whole. The side plates on both sides are connected at the upper opening by the tie rods. The side plates are welded with vertical ribs arranged perpendicular to the side plates at a certain distance. The vertical ribs are welded to the horizontal beams. The bottom plate is welded with bottom plate stiffening ribs. The outer surfaces of the bottom plate and the side plates are affixed with electric heating film. The outer side of the electric heating film is provided with insulation plates and protective plates. The construction efficiency of the integral beam mold is greatly improved. There is no need to support and dismantle the mold in blocks. The demoulding speed is fast, the surface molding quality is good, and the heat energy conversion rate is high. Peak and valley electricity maintenance is used, which has low cost, high maintenance efficiency and fast mold turnover.

Description

Technical Field

[0001] The invention relates to the technical field of prefabricated component production, and in particular to an integral mold for prefabricated beams cured by an electric heating film. Background Art

[0002] Concrete precast components usually use natural curing methods for concrete curing, which has problems such as long time consumption and low mold turnover efficiency. The existing technology uses steam curing to accelerate concrete hardening, thereby reducing the curing time and improving the mold turnover efficiency. Its essence is to use water vapor as a heat medium to transfer heat energy. This method puts the mold for pouring concrete into a steam curing tank. The water vapor indirectly transfers heat energy to the concrete surface through the closed high-temperature environment of the steam curing tank for concrete curing, causing serious heat energy loss and low heat energy conversion rate. At the same time, the precast beam mold adopts block support and disassembly, and the construction efficiency is low. A mold integrating the bottom plate and the side plate using electric heating film curing has not been reported yet. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the above-mentioned prior art and provide an integrated mold of a bottom plate and a side plate which is cured by an electric heating film.

[0004] According to the present invention, an integral mold for prefabricated beams cured with electric heating film comprises a bottom plate, side plates, flexible corners, pull rods, horizontal beams, electric heating film, insulation plates and protective plates. The bottom plate and the side plates form a cavity with an upper opening. The flexible corners are arranged at the junction of the bottom plate and the side plates. The bottom plate, the flexible corners and the side plates are connected as a whole. The side plates on both sides are connected at the upper opening by the pull rods. The side plates are welded with vertical ribs arranged perpendicular to the side plates at a certain distance. The vertical ribs are welded to the horizontal beams. The bottom plate is welded with bottom plate stiffening ribs. The outer surfaces of the bottom plate and the side plates are covered with electric heating films. The insulation plates and the protective plates are arranged on the outer sides of the electric heating films.

[0005] The electric heating film curing prefabricated beam integral mold provided by the present invention also has the following auxiliary technical features:

[0006] Steel ear plates arranged at a certain distance are welded on the upper surface of the horizontal beam, and the steel ear plates are provided with through holes connected to the pull rods.

[0007] The pull rod is composed of a limit device and threaded steel bars welded together.

[0008] The cavity is provided with a fixed end plate at one end and a movable end plate at the other end.

[0009] The electric heating film is connected to an external independently placed temperature control box through an electric cable.

[0010] At least two beam formwork piers are arranged on the lower side of the bottom plate.

[0011] The side panels are straight-line panels or folded-line panels.

[0012] The protection plate is a corrugated galvanized thin steel plate, and the protection plate is fixedly connected to the vertical ribs and the bottom plate stiffening ribs.

[0013] The middle part of the bottom plate is arched upwards to a certain height.

[0014] The electric heating film is a PTC electric heating film.

[0015] The electric heating film curing prefabricated beam integral mold provided by the present invention has the following advantages compared with the prior art:

[0016] 1. There is no need to support and dismantle the mold in blocks, the construction efficiency is greatly improved, and the surface molding quality is good.

[0017] 2. High heat energy conversion rate, using peak and valley electricity for maintenance, high maintenance efficiency and low electricity cost.

[0018] 3. Prefabricated components can be demoulded quickly, the mold turnover efficiency is high, and the amortization cost is low.

[0019] 4. The number of molds is small, the relocation is convenient, the adaptability to the site is strong, and prefabrication on site can reduce the transportation cost of components. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the mold structure of the present invention.

[0021] Figure 2 The side panel of the present invention is a cross-sectional view of a straight-line panel.

[0022] Figure 3 The side panel of the present invention is a cross-sectional view of a folded line panel

[0023] Figure 4 This is an enlarged view of the flexible corner of the present invention.

[0024] Figure 5 It is the mold effect diagram of the present invention. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0026] See also Figures 1 to 5In an embodiment of an integral mold for curing prefabricated beams with electric heating film given by the present invention, the mold comprises a bottom plate 1, a side plate 2, a flexible corner 3, a tie rod 4, a horizontal beam 5, an electric heating film 6, an insulation board 7 and a protection board 8. The bottom plate 1 and the side plate 2 form a cavity 21 with an upper opening. The flexible corner 3 is provided at the junction of the bottom plate 1 and the side plate 2. The bottom plate 1, the flexible corner 3 and the side plate 2 are connected as a whole. The side plates 2 on both sides are connected at the upper opening by the tie rod 4. The side plates 2 are welded with vertical ribs 22 arranged perpendicular to the side plates at a certain distance. The vertical ribs 22 are welded to the horizontal beam 5. The bottom plate 1 is welded with bottom plate stiffening ribs 11. The outer surfaces of the bottom plate 1 and the side plate 2 are affixed with electric heating films 6. The insulation board 7 and the protection board 8 are provided on the outer side of the electric heating film 6. The bottom plate 1 and the side plate 2 are preferably made of materials with good thermal conductivity and high rigidity, such as steel and aluminum. The insulation board is preferably polyurethane or rock wool insulation board. After pouring concrete inside the cavity 21 and letting it stand for a certain period of time, the surface of the bottom plate 1 and the side plate 2 can be directly heated by powering on. There is no need to move the mold, which is convenient for construction. The heat generated by the electric heating film 6 is directly transferred to the concrete through the bottom plate 1 and the side plate 2. The heat energy utilization efficiency is high, the demoulding speed is fast, and the mold turnover is fast. Under the heat insulation of the insulation board, the heat loss rate is small. The vertical ribs 22 and the bottom plate stiffening ribs 11 are preferably L-shaped. The vertical ribs 22 and the bottom plate stiffening ribs 11 help to improve the rigidity and strength of the side plate 2 and the bottom plate 1, and can also be used to fix the protective plate 8. The panel load is transferred to the bottom plate 1 and the horizontal beam 5 through the vertical ribs 22, and then balanced with each other through the pull rod 4. The force transmission path is clear, the amount of steel is small, and a construction work surface is provided for the operator.

[0027] See also Figures 2 to 4 In an embodiment of an integral mold for an electric heating film curing prefabricated beam provided by the present invention, steel ear plates 23 arranged at a certain distance are welded on the upper surface of the horizontal beam 5, and the steel ear plates 23 are provided with through holes for connecting the tie rod 4, and the tie rod 4 is composed of a limit device 41 and a threaded steel bar 42 welded together. The steel ear plates 23 are hingedly connected to the tie rod 4 to facilitate the support and removal of the mold. The limit device 41 preferably has the angle steel corner facing upward to prevent concrete from sticking to the tie rod 4. The angle steel 41 not only ensures the tensile strength, but also provides a limit function.

[0028] See also Figure 1 , Figure 5In an embodiment of an integral mold for curing prefabricated beams with electric heating film provided by the present invention, a fixed end plate 22 is provided at one end of the cavity 21, and a movable end plate 23 is provided at the other end, and the electric heating film 6 is connected to an external independently placed temperature control box 9 through a cable 91. The movable end plate 52 can be used to prefabricate prefabricated beams of different lengths, thereby improving the versatility of the mold, and the independently connected temperature control box 9 improves the convenience of transportation.

[0029] See also Figures 2 to 5 In an embodiment of an integral mold for prefabricated beams cured by an electric heating film provided by the present invention, at least two beam mold piers 12 are arranged on the lower side of the bottom plate stiffening rib 11, the side panel 2 is a straight panel or a broken line panel, the protection plate 8 is a corrugated galvanized thin steel plate, the protection plate 8 is fixedly connected to the vertical ribs 22 and the bottom plate stiffening ribs 11, the middle part of the bottom plate 1 is arched upward to a certain height, and the electric heating film 6 is a PTC electric heating film. The pier 12 is in contact with the ground to meet the needs of different working conditions on construction sites. The side panels 2 of different shapes can be used to prefabricate prefabricated beam components of different shapes and specifications. The corrugated galvanized thin steel plate increases the rigidity of the protection plate 8. The vertical ribs 22 and the bottom plate stiffening ribs 11 are preferably L-shaped steel plates. The folded edges of the L-shaped steel plates can be fixedly connected to the protection plate 8 to protect the insulation board 7 and the electric heating film 6 on the inside. At the same time, the protection plate 8 has a waterproof function. The arch height only needs to meet the arch height of the prefabricated beam to ensure the deformation requirements of the prefabricated beam.

[0030] In the present invention, all "certain distances, certain heights" refer to the length necessary to meet design requirements, that is, the length required to meet connection and strength requirements. This length is clear to ordinary technicians in this field and can be set as needed.

Claims

1. An integral mold for an electric heating film curing prefabricated beam, comprising a bottom plate, a side plate, a flexible corner, a tie rod, a horizontal beam, an electric heating film, an insulation plate and a protection plate, wherein the bottom plate and the side plate form a cavity with an upper opening, characterized in that The flexible corner is provided at the intersection of the bottom plate and the side plate, the bottom plate, the flexible corner and the side plate are connected as a whole, the side plates on both sides are connected at the upper opening by the pull rod, the side plates are welded with vertical ribs arranged perpendicular to the side plates at a certain distance, the vertical ribs are welded and connected to the horizontal beams, the bottom plate is welded with bottom plate stiffening ribs, the outer surfaces of the bottom plate and the side plates are affixed with electric heating films, the outer sides of the electric heating films are provided with the insulation plate and the protection plate.

2. The electric heating film curing prefabricated beam integral mold according to claim 1, characterized in that Steel ear plates arranged at a certain distance are welded on the upper surface of the horizontal beam, and the steel ear plates are provided with through holes connected to the pull rods.

3. The electric heating film curing prefabricated beam integral mold according to claim 1, characterized in that The pull rod is composed of a limit device and threaded steel bars welded together.

4. The electric heating film curing prefabricated beam integral mold according to claim 1, characterized in that The cavity is provided with a fixed end plate at one end and a movable end plate at the other end.

5. The electric heating film curing prefabricated beam integral mold according to claim 1, characterized in that The electric heating film is connected to an external independently placed temperature control box through an electric cable.

6. The electric heating film curing prefabricated beam integral mold according to claim 1, characterized in that At least two beam formwork piers are arranged on the lower side of the bottom plate.

7. The electric heating film curing prefabricated beam integral mold according to claim 1, characterized in that The side panels are straight-line panels or folded-line panels.

8. The electric heating film curing prefabricated beam integral mold according to claim 1, characterized in that The protection plate is a corrugated galvanized thin steel plate, and the protection plate is fixedly connected to the vertical ribs and the bottom plate stiffening ribs.

9. The electric heating film curing prefabricated beam integral mold according to claim 1, characterized in that The middle part of the bottom plate is arched upwards to a certain height.

10. The electric heating film curing prefabricated beam integral mold according to claim 1, characterized in that The electric heating film is a PTC electric heating film.

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