Precast concrete distribution box mold with adjustable size

Abstract

The utility model relates to the technical field of forming molds for manufacturing formed products with cavities or holes formed to the surfaces, and discloses a size-adjustable prefabricated concrete distribution box mold which is formed by enclosing four mold units, and each mold unit is formed by fixedly connecting two plane templates which are perpendicular to each other into a whole at the edge position. The four mold units are mutually lapped to define a rectangular frame, and in the two plane mold plates forming each mold unit, one plane mold plate is located on the inner side of the other mold unit, and the other plane mold plate is located on the outer side of the other mold unit; the die units are provided with fixed-distance screw holes at intervals in the horizontal direction, and every two adjacent die units are detachably and fixedly connected through a plurality of positioning bolts penetrating through the lap joint positions. According to the utility model, the size of the mold is adjustable, and concrete distribution boxes with various specifications can be formed by pouring through one mold. And meanwhile, on the premise of ensuring that the connecting piece is not wrapped by the concrete, the concrete is not leaked, and the mold strength is enough.

Description

Technical Field

[0001] The utility model relates to the technical field of molds for manufacturing molded products with cavities or holes opened on the surface, in particular to a prefabricated concrete distribution box mold with adjustable size. Background Art

[0002] The distribution box installed in the building is usually installed on the non-load-bearing wall (installing it on the load-bearing wall will affect the load-bearing), and for the sake of construction efficiency, the non-load-bearing wall is often built with aerated concrete blocks. When the distribution box is buried on this wall, the blocks at the opening position will fall down due to lack of support. Therefore, it is necessary to set a lintel above the reserved opening, seal the opening and then mortar the surface. During construction, wooden frames and other broken materials are used to fix the box. This traditional method has a large human influence factor, which will cause damage and pollution to the box during construction, inconvenient installation, waste materials, and cannot guarantee the verticality and flatness of the box, thus affecting the overall appearance.

[0003] Then a new technology for installing the components of the distribution box body appeared, that is, pouring a load-bearing square box with concrete in advance, and placing this square box in the wall, which can support the blocks above without the use of lintels, making the distribution box more regular and beautiful.

[0004] The number of distribution boxes used in a construction project is small, and the customization cycle of finding a prefabrication site is long and involves transportation issues, so they are usually prefabricated by the construction unit. However, there are many specifications of distribution boxes on the market, and distribution boxes of different specifications require molds of different sizes for casting. The construction party has to prepare a bunch of molds of different specifications by themselves, and each mold can only be used a few times, which is a serious waste. Utility Model Content

[0005] The utility model provides a prefabricated concrete distribution box mould with adjustable size.

[0006] The technical problem to be solved is: the demand for prefabricated concrete distribution boxes is small and it is not suitable to find a prefabrication site for customization. However, due to the large number of specifications, the construction unit needs to prepare many kinds of molds for prefabrication by itself, which is a serious waste.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions: a precast concrete distribution box mold with adjustable size, the precast concrete distribution box comprises an inner shell of the distribution box and a concrete layer wrapped outside the inner shell of the distribution box, the inner shell of the distribution box is a square box without a cover or with a movable cover, the mold is enclosed by four mold units, the mold unit is formed by two mutually perpendicular plane templates fixedly connected at the edge position as a whole, the four mold units overlap each other to form a rectangular frame, and of the two plane templates constituting each mold unit, one is located inside the other mold units and the other is located outside the other mold units;

[0008] The mold units are provided with fixed-distance screw holes spaced apart in the horizontal direction, and two adjacent mold units are detachably fixedly connected by a plurality of positioning bolts passing through the overlapping positions;

[0009] When the precast concrete electric box is cast, the opening of the inner shell of the electric box is buckled downward in the mold, and the outer periphery of the inner shell of the electric box and the upper part form a chamber for casting concrete.

[0010] Furthermore, a scale for controlling the thickness of concrete pouring is provided on the mold unit in the vertical direction.

[0011] Furthermore, the distance screw hole is arranged higher than the highest line in the scale.

[0012] Furthermore, when the precast concrete electric box is cast, a release agent is coated on the surface of the mold unit exposed on the inner side of the mold.

[0013] Furthermore, a hole for passing a wire pipe is opened on the inner shell of the electric box. When the precast concrete electric box is cast, the hole on the inner shell of the electric box is blocked with a discarded wire pipe section, and the discarded wire pipe section is filled with construction solid waste.

[0014] Furthermore, the mold unit is an aluminum mold.

[0015] Furthermore, the distance screw hole is a round hole or a waist hole with a vertical long axis that is clearance-matched with the positioning bolt, and the positioning bolt is locked by a butterfly nut after passing through the mold from the inside to the outside.

[0016] Compared with the prior art, the prefabricated concrete distribution box mold with adjustable size in the utility model has the following beneficial effects:

[0017] In the utility model, a square frame with adjustable size is formed by overlapping a plurality of mold units connected by means of positioning bolts higher than concrete, and the inner shell of the electric box is placed in the square frame and cast to form a concrete distribution box. A single mold can be used to cast and form concrete distribution boxes of various specifications. At the same time, by adjusting the topological structure and connection method of the mold unit combination, it is ensured that the concrete does not leak and the mold strength is sufficient under the premise of ensuring that the connecting parts are not wrapped by concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a prefabricated concrete distribution box mold with adjustable size in the utility model when in use;

[0019] Figure 2 This is a schematic diagram of the structure of the mold unit. In order to show each surface, the angle between the two plates of the mold unit is larger than that when in use;

[0020] Figure 3It is a schematic diagram of the positional relationship between concrete, scale and fixed-distance screw holes during pouring;

[0021] In the figure, 1-mold unit, 2-positioning bolt, 3-distance screw hole, 4-scale, 5-electric box inner shell. DETAILED DESCRIPTION

[0022] like Figure 1-3 As shown, a precast concrete distribution box mold with adjustable size, the precast concrete box includes an inner shell 5 and a concrete layer wrapped outside the inner shell 5, the inner shell 5 is a square box without a cover or with a movable cover. The inner shell 5 of the box in the utility model has no unified name in the industry. It is a plastic box that acts as a core mold when pouring concrete. It does not need to be taken out afterwards and can be directly used as the inner wall of the distribution box, or an iron distribution box can be installed inside. Here it is uniformly referred to as the inner shell 5 of the box.

[0023] The mold is enclosed by four mold units 1, and the mold unit 1 is formed by two mutually perpendicular plane templates fixedly connected at the edge position as a whole. The four mold units 1 overlap each other to enclose a rectangular frame. Of the two plane templates constituting each mold unit 1, one is located inside the other mold units 1 and the other is located outside the other mold units 1;

[0024] This topological structure is the optimal structure obtained after repeated optimization. First of all, it is a centrally symmetrical three-dimensional structure. There is no local weakness in the force. When pouring concrete, it will not deform due to uneven force. Secondly, this structure does not require sealing strips, because the overlapping parts between the plates are very long, resulting in a long and tortuous path for concrete to seep out, making it difficult for concrete to seep out.

[0025] The mold unit 1 is provided with fixed-distance screw holes 3 at intervals in the horizontal direction, and two adjacent mold units 1 are detachably fixedly connected by a plurality of positioning bolts 2 passing through the overlapping positions;

[0026] Here, the fixed-distance screw hole 3, as the name implies, has a fixed distance between two adjacent screw holes. In this embodiment, when the entire mold is at its smallest, the internal dimensions are consistent with the smallest size distribution box, and the screw center distance between two adjacent screw holes is five centimeters, while the size difference between distribution boxes of different specifications on the market is generally five or ten centimeters per level.

[0027] When the precast concrete electric box is cast, the opening of the electric box inner shell 5 is buckled downward in the mold, and the outer periphery of the electric box inner shell 5 and the upper part form a chamber for casting concrete. The usual precast concrete distribution box has this structure, that is, a concrete square box with a bottom and a plastic electric box inner shell 5 inside. However, if there is a scenario where the bottom of the square box does not need to be cast, but only a concrete frame needs to be cast, concrete can also be cast only around the electric box inner shell 5.

[0028] The mold unit 1 is provided with a scale 4 for controlling the thickness of concrete pouring in the vertical direction. The scale 4 here needs to be provided on each mold unit 1, so that it can not only control the height, but also play a simple leveling effect to see whether the concrete is flat. When the concrete is flat, its height on the four sides is consistent.

[0029] The distance screw hole 3 is arranged higher than the highest line in the scale 4. This prevents the positioning bolt 2 from being wrapped in concrete and unable to be removed.

[0030] When the precast concrete electric box is cast, the surface of the mold unit 1 exposed to the inner side of the mold is coated with a release agent. Of course, the release agent can also be replaced with paper or plastic film for demoulding, but the cost is slightly higher.

[0031] The inner shell 5 of the electric box is provided with a hole for passing the wire pipe. When the precast concrete electric box is poured, the hole on the inner shell 5 of the electric box is blocked with a discarded wire pipe section, and the discarded wire pipe section is filled with construction solid waste. If the hole here on the inner shell 5 of the electric box is not filled, concrete rock holes will enter the interior during pouring, so it needs to be filled. The discarded wire pipe section is used for filling because its size is just right, and the construction solid waste here can be a ball of waste paper, a ball of waste plastic bag, or a ball of mud. In this embodiment, it is only necessary to ensure that the concrete does not enter the inner shell 5 of the electric box, and the hole for installing the wire pipe during subsequent construction is drilled on site.

[0032] Of course, you can also extend the abandoned wire pipe section outward a little and push it against the inner wall of the mold, so that a channel can be directly reserved in the concrete. However, the inner diameter of the abandoned wire pipe section installed in this way needs to be larger than the outer diameter of the actual installed wire pipe, because the abandoned wire pipe section here is not easy to take out after pouring, and it cannot be connected with the subsequently installed wire pipe, so the wire pipe can only be passed through it.

[0033] In this embodiment, the mold unit 1 is an aluminum mold, because this aluminum mold with an L-shaped cross section and no back ribs is available on the market and does not need to be customized by oneself.

[0034] The distance screw hole 3 is a round hole or a waist hole with a vertical long axis that is clearance-matched with the positioning bolt 2. The positioning bolt 2 passes through the mold from the inside to the outside and is locked by a butterfly nut. There are many distance screw holes 3 here. It is very difficult to align all the distance screw holes 3 used when installing the positioning bolts 2. The use of waist holes or larger round holes can reduce this difficulty. Of course, the round holes here can only be a little bigger. If they are too big, it will affect the accuracy. It is better to use waist holes with vertical long axes, because this is not only easy to install, but also will not cause obvious accuracy problems. The reason why the positioning bolts 2 are allowed to pass outward is to avoid affecting the insertion of the inner shell 5 of the electric box.

[0035] A method for using a precast concrete distribution box mold with adjustable size in this embodiment includes the following steps:

[0036] Step 1: Adjust the size of the mold according to the size of the precast concrete distribution box to be cast and fix it with positioning bolts 2, and then apply a release agent;

[0037] Step 2: Place the inner shell 5 of the electric box and then pour concrete;

[0038] Step 3: After the concrete solidifies, remove the mold for concrete curing, and then continue to use the mold to cast the next precast concrete distribution box;

[0039] Step 4: After the mold is used, disassemble the mold, clean the concrete stuck on it, and then store it in the warehouse.

[0040] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A precast concrete distribution box mold with adjustable size, the precast concrete distribution box comprising an inner box shell (5) and a concrete layer wrapped outside the inner box shell (5), the inner box shell (5) being a square box without a cover or with a movable cover, characterized in that: The mould is formed by enclosing four mould units (1), wherein the mould unit (1) is formed by two mutually perpendicular plane templates fixedly connected at the edge as a whole, and the four mould units (1) are overlapped with each other to form a rectangular frame, and of the two plane templates constituting each mould unit (1), one is located inside the other mould units (1) and the other is located outside the other mould units (1); The mold unit (1) is provided with fixed-distance screw holes (3) spaced apart in the horizontal direction, and two adjacent mold units (1) are detachably fixedly connected by a plurality of positioning bolts (2) passing through overlapping positions; When the precast concrete electric box is cast, the opening of the electric box inner shell (5) is buckled downward into the mold, and the outer periphery of the electric box inner shell (5) and the upper portion form a chamber for casting concrete.

2. The precast concrete distribution box mold with adjustable size according to claim 1 is characterized in that: The mold unit (1) is provided with a scale (4) in the vertical direction for controlling the thickness of concrete pouring.

3. The precast concrete distribution box mold with adjustable size according to claim 2 is characterized in that: The distance screw hole (3) is arranged higher than the highest line in the scale (4).

4. The precast concrete distribution box mold with adjustable size according to claim 1, characterized in that: When the precast concrete electrical box is cast, the surface of the mold unit (1) exposed on the inner side of the mold is coated with a release agent.

5. The precast concrete distribution box mold with adjustable size according to claim 1 is characterized in that: The inner shell (5) of the electric box is provided with a hole for inserting a wire pipe. When the precast concrete electric box is cast, the hole on the inner shell (5) of the electric box is blocked with a discarded wire pipe section, and the discarded wire pipe section is filled with construction solid waste.

6. The precast concrete distribution box mold with adjustable size according to claim 1, characterized in that: The mold unit (1) is an aluminum mold.

7. The precast concrete distribution box mold with adjustable size according to claim 1, characterized in that: The distance screw hole (3) is a round hole or a waist hole with a vertical long axis that is clearance-matched with the positioning bolt (2). The positioning bolt (2) is locked by a butterfly nut after passing through the mold from the inside to the outside.

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