Tyre mould with bottom support

Abstract

The utility model provides a kind of ground tire mould for hoisting conveniently with bottom support, including ground tire mould, side mould plate and two hollow rods, side mould plate is set on ground tire mould upper surface, the size of ground tire mould is greater than prefabricated component, two installation grooves are set on ground tire mould upper surface, hollow rod upper surface is plane, hollow rod is set on the installation groove, and hollow rod upper surface and ground tire mould upper surface are flush after setting, hollow rod upper surface is provided with release agent layer, and it is applicable to the release hoisting operation of prefabricated beam, prefabricated cover plate and other concrete components, the utility model is simple in structure, low in cost, power-free, solve the problem of component damage and low efficiency caused by traditional ground tire mould unable to realize bottom support hoisting.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically a ground formwork that is easy to support and lift. Background Technology

[0002] In building construction, precast beams, precast cover plates, etc. often need to be prefabricated. When using ground formwork to make these components, traditional ground formwork is mostly made of concrete. After casting, the components can be separated by pry bars to achieve demolding.

[0003] After precast components are precast, they need to be demolded. Crowbars are often used for demolding, but this has the following drawbacks: when a crowbar is inserted into the gap between the concrete component and the base plate, the precast concrete component has poor hardness, and manual prying can easily cause damage to the edges and corners of the component, with a damage rate of 15% to 20%, resulting in a great waste.

[0004] Existing technologies also employ methods for separating precast concrete components using pre-embedded lifting rings. For example, Chinese patent CN208167766U discloses a simple and quick connection method for precast concrete slab formwork, where lifting rings are provided at each of the four corners of the concrete slab, and quick-connect clamps are inserted into the corresponding lifting rings on adjacent precast concrete slabs. However, using pre-embedded lifting rings for component demolding also has some drawbacks: the bottom of the concrete component after molding has no support point, and the concrete component is in direct contact with the lifting device, making it prone to tilting and slippage during lifting; the lifting efficiency is low, with a single component taking 3-5 minutes to lift; the lifting rings are expensive to manufacture, the process is complex, and the time consumption is long; and the use of complex mechanical devices leads to high equipment costs and maintenance difficulties. Summary of the Invention

[0005] This utility model provides a ground formwork that facilitates bottom support and lifting, suitable for demolding and lifting operations of precast beams, precast cover plates and other concrete components. This utility model has a simple structure, low cost, and requires no power, solving the problems of component damage and low efficiency caused by the inability of traditional ground formwork to achieve bottom support and lifting.

[0006] To achieve the above objectives, this utility model provides a ground formwork that is easy to support and lift, including a ground formwork, side formwork, and two hollow rods. The ground formwork of this utility model is equivalent to a slab-shaped foundation.

[0007] The side template is set on the upper surface of the ground formwork. The size of the ground formwork is larger than the size of the precast component, and the size of the ground formwork is also larger than the size of the side template. The side template is constructed as an enclosing structure formed by four plates connected end to end.

[0008] Two mounting grooves are provided through the upper surface of the ground mold, and the mounting grooves penetrate through the two opposite side walls of the ground mold.

[0009] After the hollow rod is placed on the mounting groove, the upper surface of the hollow rod is flush with the upper surface of the ground mold, which does not affect the prefabrication of the component.

[0010] A release agent layer is provided on the upper surface of the hollow rod. In this invention, two hollow rods are pre-embedded at appropriate positions along the length of the main body during the fabrication of the ground mold. The hollow rods are used to pass through the bottom lifting device. The cross-section of the hollow rods can be selected according to the appropriate size of the lifting device. Before pre-embedding, a layer of release agent should be applied to the upper surface of the hollow rods to prevent the concrete from adhering to the upper surface of the hollow rods, facilitating removal.

[0011] Preferably, the hollow rod has a quadrilateral cross-section, with the bottom surface of the hollow rod fitting against the wall of the mounting groove, and the side wall of the hollow rod fitting against the wall of the mounting groove. The fitting of the side wall and the bottom surface of the mounting groove prevents concrete from seeping into the gap, avoids adhesion between the precast component and the outer surface of the hollow rod, and facilitates demolding.

[0012] Preferably, the distance between the hollow rod and the short side of the precast component is 1 / 5 to 1 / 4 of the length of the precast component. This size and spacing are determined according to the requirements of the lifting point arrangement, which ensures that the precast component is under balanced force during the lifting process and that the lifting is stable and safe.

[0013] Preferably, the hollow rod has an isosceles trapezoidal cross-section, and the mounting groove also has an isosceles trapezoidal cross-section that matches the hollow rod. The upper side of the hollow rod is longer than the lower side. The hollow rod and the mounting groove have a side-sloping structure, which facilitates demolding, allows the hollow rod to be smoothly installed, and reduces friction and impact between the hollow rod and the mounting groove.

[0014] Preferably, the bottom support lifting device in this utility model can be a sling or a steel bar, and the hollow rod is used to thread the sling or steel bar through. This utility model uses a sling. Traditional steel slings have a friction coefficient of 0.7 when in direct contact with concrete. This utility model uses a sling with a steel sling structure, and the hollow rod is also a steel structure. The friction coefficient between the steel sling and the hollow rod is 0.15, which can reduce the friction coefficient by 80%. The lifting efficiency is improved, and the lifting time for a single piece is shortened to within 30 seconds.

[0015] The two mounting slots are symmetrical about the centerline of the ground formwork along its length. The structure is simple, which facilitates the balance of forces on the prefabricated components during hoisting and ensures stable lifting.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention avoids direct contact between the lifting equipment and the precast concrete components during the lifting and demolding process, reducing friction, preventing damage to edges and corners, lowering the breakage rate of components during lifting, and increasing the yield of finished products.

[0017] This utility model has a simple structure and a simple manufacturing method. The material cost is greatly reduced compared to professional equipment. The lifting ring structure is eliminated. The bottom support and hoisting of the ground formwork is achieved by setting the installation groove and hollow rod. Attached Figure Description

[0018] Figure 1 This is an exploded perspective view of a ground mold that is easy to support and lift, as described in this utility model.

[0019] Figure 2 This is an exploded structural front view of a ground formwork that is easy to support and lift, as described in this utility model.

[0020] Figure 3 This is a perspective view of the assembled state of a ground mold that is easy to support and lift, as described in this utility model.

[0021] Figure 4 This is a cross-sectional structural diagram of Embodiment 1 of this utility model in the lifting state.

[0022] Figure 5 This is a perspective view of Embodiment 2 of this utility model in its assembled state.

[0023] Figure 6 This is a front view of Embodiment 2 of this utility model in its assembled state.

[0024] In the diagram: 1-Ground formwork, 2-Side formwork, 3-Hollow rod, 4-Precast component, 5-Installation groove, 6-Release agent layer, 7-Steel bar, 8-Lifting strap. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0026] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "front", "back", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or structure referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Example 1:

[0028] like Figure 1As shown, a ground formwork that facilitates bottom lifting is suitable for demolding and lifting operations of precast cover plates. It includes a ground formwork 1, side templates 2, and two hollow rods 3. The side templates 2 are set on the upper surface of the ground formwork 1. The dimensions of the ground formwork 1 are larger than those of the precast component 4. In this embodiment, the length and width of the ground formwork 1 are both greater than 1.1 times the length and width of the side templates 2, which facilitates the side templates to be fully supported on the upper surface of the ground formwork and also facilitates the hollow rods 3 to fully extend and cover the width of the side templates 2.

[0029] Two mounting grooves 5 are provided through the upper surface of the ground mold 1. The upper surface of the hollow rod 3 is flat. After the hollow rod 3 is placed on the mounting groove 5, the upper surface of the hollow rod 3 is flush with the upper surface of the ground mold 1. A release agent layer 6 is provided on the upper surface of the hollow rod 3.

[0030] like Figure 3 As shown, in this embodiment, the bottom surface of the hollow rod 3 and the side wall of the hollow rod 3 are both in contact with the wall surface of the mounting groove 5.

[0031] like Figure 2 As shown, in this embodiment, the distance d between the short side of the hollow rod 3 and the prefabricated component 4 is 1 / 5 of the length D of the prefabricated component 4.

[0032] like Figure 4 As shown, in this embodiment, the hollow rod 3 is used to thread the sling 8 through.

[0033] In this embodiment, the two mounting grooves 5 are symmetrical about the center line of the length direction of the ground mold 1.

[0034] like Figure 1 As shown, in this embodiment, the hollow rod 3 is constructed as a hollow square steel structure. The hollow part penetrates the upper surface of the ground mold 1 in the width direction, and the ground mold 1 and the side template 2 are aligned in the length direction.

[0035] The working principle of this embodiment is as follows: Figure 4 As shown, Figure 4 To view the cross-sectional structure, first install two hollow rods 3 in two mounting slots 5 respectively. Apply a release agent to the upper surface of the hollow rods 3 to form a release agent layer 6. Then, assemble the side templates 2 and install them in the corresponding positions of the ground formwork 1, ensuring that the distance between the short side of the hollow rods 3 and the precast component 4 is 1 / 5 of the length of the precast component 4. Place reinforcing bars in the space formed by the side templates 2 and then pour the concrete. After the concrete has solidified, remove the side templates 2. Use slings 8 to pass through the hollow rods 3 and extend upwards. Use slings 8 to lift the precast component 4, and the hollow rods 3 support the precast component 4 to rise, thus completing the separation of the precast component 4 and the ground formwork 1.

[0036] Traditional steel straps have a high coefficient of friction (0.7) when in direct contact with concrete, which can easily damage concrete components. The lifting strap 8 with a steel strap structure and the hollow rod 3 with a steel structure have a coefficient of friction of 0.15, which can reduce the coefficient of friction by 80%. This embodiment greatly improves the lifting efficiency and shortens the lifting time of a single piece to within 30 seconds.

[0037] Example 2: A ground formwork that is easy to lift from the bottom.

[0038] like Figure 5 and Figure 6 As shown, the difference between this embodiment and the above embodiment 1 is that the distance between the short side of the hollow rod 3 and the prefabricated component 4 in this embodiment is 1 / 4 of the length of the prefabricated component 4.

[0039] In this embodiment, the hollow rod 3 has an isosceles trapezoidal cross-section, and the mounting groove 5 also has an isosceles trapezoidal cross-section. The upper side of the hollow rod 3 is longer than the lower side.

[0040] In this embodiment, the hollow rod 3 is used to insert the steel rod 7. In this embodiment, the steel rod 7 is used as a pry bar to apply external force for demolding.

Claims

1. A tire mold facilitating bottoming out of hoisting, characterized by It includes a ground mold (1), a side mold (2) and two hollow rods (3); the side mold (2) is set on the upper surface of the ground mold (1), the size of the ground mold (1) is larger than the precast component (4), two mounting grooves (5) are provided through the upper surface of the ground mold (1), the upper surface of the hollow rod (3) is flat, the upper surface of the hollow rod (3) is flush with the upper surface of the ground mold (1) after the hollow rod (3) is set on the mounting groove (5), and a release agent layer (6) is provided on the upper surface of the hollow rod (3).

2. The tire mold of claim 1, wherein: The hollow rod (3) has a quadrilateral cross-section, and the bottom surface and side wall of the hollow rod (3) are in contact with the wall of the mounting groove (5).

3. The tire mold of claim 1, wherein: The distance between the short side of the hollow rod (3) and the precast component (4) is 1 / 5 to 1 / 4 of the length of the precast component (4).

4. The tire mold of claim 1, wherein: The hollow rod (3) has an isosceles trapezoidal cross-section, and the mounting groove (5) also has an isosceles trapezoidal cross-section. The upper side of the hollow rod (3) is longer than the lower side.

5. The ground tire mold of claim 1, wherein: The hollow rod (3) is used to thread the sling (8) or steel bar (7).

6. The ground tire mold of claim 1, wherein: The two mounting slots (5) are symmetrical about the center line of the ground mold (1) in the length direction.

Images