Concrete preformed hole device with variable size

Abstract

The utility model relates to the technical field of concrete preformed holes, in particular to a size-variable concrete preformed hole device. The bracket is fixed on a basic surface and is used for supporting the center rod; the first nut and the second nut are in threaded connection with the center rod, and the screwing directions of threads are opposite; the first positioning disc and the second positioning disc are installed on the center rod and located between the first nut and the second nut. The first scale rod and the second scale rod are hinged to the first nut and the second nut respectively and lapped on the first positioning disc and the second positioning disc respectively, and the first scale rod and the second scale rod are connected through a spring. The fixing device is fixedly connected to the first positioning disc and the second positioning disc, and the rolling skin is wound on the fixing device; and the controller is fixedly connected to the first scale rod, the second scale rod or the spring. The manufacturing cost is low, taking out is easy, no impurities are left in the hole, and the hole diameter size can be guaranteed; and the manufacturing requirements of concrete preformed holes of different shapes and sizes can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete reserved holes, in particular to a concrete reserved hole device with variable sizes. Background Art

[0002] Concrete reserved holes refer to holes reserved in concrete structural components (such as beams and slabs) during construction to meet certain special needs (such as water, electricity, heating pipes, embedded bolts for equipment, etc.). Common reserved holes are round holes and square holes.

[0003] The existing method for constructing reserved holes in concrete mainly uses wooden or iron molds to reserve holes in advance, and then removes the wooden or iron molds after the concrete is poured and a certain strength is formed. Although wooden molds are low in cost and easy to remove, their disadvantages are that they are difficult to fix, the aperture size is difficult to guarantee, and the debris left in the hole is difficult to remove. Iron molds overcome the above-mentioned disadvantages of wooden molds, but they are expensive, the size of the reserved holes is limited by the size of iron pipes on the market, and the iron pipes are difficult to remove from the holes (concrete and iron have good bonding properties); the part of the iron mold exposed outside the hole is often cut off at the construction site, and the iron mold is left in the hole, causing a lot of waste. Regardless of whether it is a wooden mold or an iron mold, it needs to be made or purchased on site according to the reserved holes of different sizes; in addition, the side walls of the reserved holes formed by wooden molds and iron molds are relatively smooth, which is not conducive to the bonding of new and old concrete in situations where secondary grouting is required.

[0004] In short, the existing concrete mold cannot achieve low cost, easy removal, no debris left in the hole, and can ensure the hole size. The existing concrete mold can only make concrete reserved holes of fixed shape and size. Once the shape and size of the concrete reserved hole change, a new concrete mold must be made. The mold can only be used once, with low utilization rate and high cost. The existing concrete mold cannot ensure the roughness of the side wall of the concrete reserved hole. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the utility model provides a variable-size concrete pre-hole device. It is low-cost, easy to remove, and has no debris left in the hole. It can also ensure the hole size and the bonding strength when secondary grouting is required in the hole; it can change the size to meet the production requirements of concrete pre-holes of different shapes and sizes.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A variable-size concrete pre-hole device comprises a bracket, a center rod, a first nut, a second nut, a first positioning disc, a second positioning disc, a first scale rod, a second scale rod, a fixture, a controller and a coil; the bracket is fixed on a base surface and is used to support the center rod; the first nut and the second nut are threadedly connected to the center rod, and the thread rotation directions are opposite; the first positioning disc and the second positioning disc are installed on the center rod and are located between the first nut and the second nut; the first scale rod and the second scale rod are respectively hinged on the first nut and the second nut, and respectively rest on the first positioning disc and the second positioning disc, and the first scale rod and the second scale rod are connected by a spring; the fixture is fixed on the first positioning disc and the second positioning disc, and the coil is wrapped around the fixture; the controller is fixed on the first scale rod, the second scale rod or the spring.

[0008] Furthermore, the bracket is rotatably connected to the center rod.

[0009] Furthermore, it also includes a guide rail rod, which passes through the first nut, the first positioning disc, the second positioning disc and the second nut in sequence for guiding.

[0010] Furthermore, the controller comprises a control ring and a control sheet, the control ring is fixedly connected to the first scale rod and the second scale rod, and the control sheet is fixedly connected to the spring.

[0011] Furthermore, the ends of the first scale rod and the second scale rod are both provided with through holes, and hooks are provided at both ends of the spring, and the two ends of the spring are respectively hung on the first scale rod and the second scale rod.

[0012] Furthermore, the roll skin is made of thin iron sheet with a thickness of less than 0.5 mm, and the outer surface is provided with notches, which is a tape measure structure.

[0013] Compared with the prior art, the utility model has at least the following technical effects or advantages:

[0014] 1. The utility model can meet the production requirements of concrete reserved holes of different shapes and sizes: by rotating the center rod, the first nut and the second nut are driven to move toward or away from each other along the guide rod at the same time, and the size of the controller is adjusted so that the size of the controller is consistent with the size of the concrete reserved hole; thus, it can adapt to concrete reserved holes of different sizes, and the aperture size can be guaranteed, and it can be used multiple times, with high utilization rate and low use cost.

[0015] The utility model is easy to take out: after the concrete is formed, the central rod is rotated to make the first nut and the second nut move in opposite directions, and the size of the controller is reduced; the concrete reserved hole device can be taken out from the prepared concrete reserved hole, and no debris is left in the hole.

[0016] 2. The outer surface of the rolled skin of the utility model is provided with notches, and the side wall of the reserved hole formed is relatively rough, which meets the roughness requirement of the side wall of the reserved hole, and the roughness can be adjusted by the sparseness of the notches to meet the roughness requirements of different concrete reserved holes.

[0017] 3. The ends of the first scale rod and the second scale rod of the utility model are both provided with through holes, and hooks are provided at both ends of the spring, and the two ends of the spring are respectively hung on the first scale rod and the second scale rod. The spring is easy to load and unload, which improves the simplicity of the device.

[0018] 4. The control ring of the utility model is fixed on the first scale rod and the second scale rod, and the control sheet is fixed on the spring; there are four first scale rods and four second scale rods, and the hinge points of the four first scale rods and the first nut are rectangular, and the hinge points of the four second scale rods and the second nut are rectangular, which are used to make circular reserved holes or rectangular reserved holes. It can construct circular concrete and square concrete at the same time, and has strong adaptability.

[0019] 5. The guide rod of the utility model passes through the first nut, the first positioning disc, the second positioning disc and the second nut in sequence, and is used for guiding and controlling movement to prevent unnecessary movement and deflection during movement, thereby improving stability and accuracy.

[0020] In short, the utility model can change the shape and size, and can basically meet all the requirements of the on-site concrete reserved hole. In addition, the utility model can meet the requirements of different roughness in the hole, ensure the bonding strength between the newly poured concrete in the hole and the original concrete, and then ensure the quality of the project in the hole. Finally, the utility model is simple to operate and easy to use, and can greatly improve the construction efficiency and quality of the concrete reserved hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model.

[0022] Figure 2 It is a three-dimensional structural schematic diagram of the supporting fixing and moving control parts of the utility model.

[0023] Figure 3 It is a structural schematic diagram of the support fixing and movement control part of the utility model.

[0024] Figure 4 It is a schematic diagram of the utility model in the unfolded state of the roll skin.

[0025] Figure 5 It is a schematic diagram of the wrapping state of the utility model.

[0026] Figure 6 The utility model is a schematic diagram of the structure of making square concrete reserved holes.

[0027] Figure 7 The utility model is a schematic diagram of the structure of making a circular concrete reserved hole.

[0028] In the figure: 1-center rod 21-first positioning disc 22-second positioning disc 31-first nut 32-second nut 41-first scale rod 42-second scale rod 43-scale line 5-spring 6-control ring 7-control plate 8-external fixer 9-internal fixer 11-thin bent iron sheet 111-notch 112-first connection point 12-triangular bracket 13-guide rod 14-circular ring plate 101-fixing surface 102-concrete DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below. In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described in combination with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width" and "

[0031] The directions or positional relationships indicated by terms such as “degree”, “thickness”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial” and “circumferential” are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0032] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements.

[0033] For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] In the description of the utility model, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0035] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the utility model. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0036] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0037] [Example]

[0038] like Figures 1 to 7 As shown, a concrete pre-drilling device with a variable size is composed of a supporting and fixing part, a moving control part, and a hole forming part.

[0039] The supporting and fixing part includes a triangular bracket 12, a center rod 1, a first positioning disc 21 and a second positioning disc 22. The top of the triangular bracket 12 is a circular ring plate, and an internal thread hole is provided in the center of the circular ring plate. The top of the center rod 1 is provided with an external thread corresponding thereto, and the top of the center rod 1 is threadedly connected to the circular ring plate. Below the triangular bracket 12 are three legs, which can be telescopically adjusted for support and fixing. The three legs are evenly distributed around the circumference and fixed on the fixed surface 101 (base surface). The three legs below the triangular bracket 12 are fixed on the fixed surface 101, and the center rod 1 is threadedly connected to the circular ring plate, so that the center axis of the circular ring plate, the axis of the concrete reserved hole, and the axis of the center rod are consistent.

[0040] The first positioning disc 21 and the second positioning disc 22 have holes opened inside. After passing through the center rod 1, two circular ring pieces 14 are used to lock the position at the top and bottom to ensure that no matter how the center rod 1 moves, the relative position of the first positioning disc 21 and the second positioning disc 22 will never change. The intersection of the first positioning disc 21 and the first scale rod 41 is recorded as the relative fixed point A.

[0041] The first positioning disc 21 and the second positioning disc 22 also have other openings for connecting with the external fixer 8, the internal fixer 9 and the guide rod 13. The top, upper part and bottom of the center rod 1 are all provided with threads for connecting with the tripod bracket 12, the first nut 31 and the second nut 32 respectively. The center rod 1 has only one degree of freedom of rotation.

[0042] The mobile control part includes a first nut 31, a second nut 32, a first scale rod 41, a second scale rod 42, a spring 5, a control ring 6, a control sheet 7 and a guide rod 13. The first nut 31 and the second nut 32 are threadedly connected to the upper and bottom of the center rod 1, and two openings are provided inside to connect with the guide rod 13.

[0043] The two guide rail rods 13 sequentially pass through the first nut 31, the first positioning disc 21, and the second positioning disc 22 and are fixedly connected to the second nut 32. When the center rod 1 rotates clockwise (or counterclockwise), the first nut 31 and the second nut 32 can move toward (or away from) the first positioning disc 21 and the second positioning disc 22 along the guide rail rod 13 at the same time through the threaded arrangement at the top and bottom of the center rod 1.

[0044] In this embodiment, four first scale rods 41 and four second scale rods 42 are provided. The scale rods are iron sheets with the same size. The upper part is hinged on the outer wall of the first nut 31, and the lower part is freely placed on the first positioning disc 22. Each scale rod is provided with an opening on the upper and lower parts. The upper opening is connected with a screw nut to ensure that each scale rod can only slide along one degree of freedom. The lower opening is connected by a spring 5 with a certain vertical length with a hook. The scale lines on the scale rods are the size values ​​of the round hole and square hole currently formed by this concrete reserved hole device.

[0045] The four springs 5 ​​are always in a tensioned state, ensuring that every two scale rods connected to the springs 5 ​​are tightly clamped on the first positioning disc 21 and the second positioning disc 22 .

[0046] The control ring 6 is in the form of a circular ring. It is first put on the four scale rods, fixed and firmly welded, and then cut into four sections at a suitable position using a cutting machine. The outermost point of the control ring 6 is set as the circumscribed circle control point B. The control sheet 7 is an L-shaped iron sheet. The connection method of the control sheet 7 is similar to that of the control ring 6. It is firmly welded to the spring 5. The outermost point of the control sheet 7 is the inscribed square control point C.

[0047] The hole forming part includes an internal fixer 8, an external fixer 9, and a thin bent iron sheet 11. The external fixer 8 is a round rod, which passes through and is fixed on the first positioning disc 21 or the second positioning disc 22. The internal fixer 9 is a round rod, the top end of which passes through the first positioning disc 21, the bottom end of which passes through the second positioning disc 22, and is fixed on the first positioning disc 21 and the second positioning disc 22.

[0048] like Figure 4 , Figure 5 As shown, the thin bent iron sheet 11 is similar to a tape measure structure, which is wound around the internal fixer 9 before use, and has an initial stress of inward retraction. The outer surface of the iron sheet can be provided with uneven notches 111 according to the roughness requirements after the actual hole is formed. When in use, the first connection point 112 is pulled out, so that the iron sheet is tightly wound around the inscribed square control point C of the control sheet 7 for one or two turns, and then the first connection point 112 is fixed back to the internal fixer 9. Or it is wound around the external fixer 8 before use, and when in use, the connection point 1 is pulled out, so that the iron sheet is tightly wound around the circumscribed circle control point B of the control ring 6 for one or two turns, and then the connection point 1 is fixed back to the external fixer 8. The internal and external fixers 8 and 9 can be added according to actual conditions to facilitate the fixation of the thin bent iron sheet 11.

[0049] The utility model is used to make circular and square concrete reserved holes, which specifically includes the following steps:

[0050] 1. By rotating the center rod 1, the first nut 31 and the second nut 32 are driven to move toward or away from each other along the guide rod 13 at the same time, and the size of the controller is adjusted so that the size of the controller is consistent with the size of the concrete reserved hole.

[0051] (or the inscribed square control point C) to reach the desired position.

[0052] 2) According to the roughness of the reserved hole in the concrete, select thin bent iron sheets 11 with different sparseness of the notches 111. The greater the roughness, the denser the notches 111. Wrap 1 to 2 turns along the circumscribed circle control point B (or the inscribed square control point C) and fix it on the external fixer 8 (or the internal fixer 9).

[0053] 3) According to the actual situation on site, the concrete pre-hole device is fixed at the desired position by means of the triangular bracket 12.

[0054] 4) Pour concrete and maintain it. After the concrete is formed, rotate the center rod 1 to make the first nut 21 and the second nut 22 move in opposite directions, thereby reducing the size of the controller.

[0055] The constraint of the external fixer 8 (or the internal fixer 9) on the thin bent iron sheet 11 is released, so that the thin bent iron sheet 11 is automatically recovered and wound back to its original position.

[0056] 5) Take the concrete hole cutter out of the prepared concrete hole.

[0057] The utility model is low in cost, easy to remove, and has no debris left in the hole. It can also ensure the hole diameter and the bonding strength when the hole is required for subsequent secondary grouting; it can meet the production requirements of concrete reserved holes of different shapes and sizes, and can basically meet all the requirements of on-site concrete reserved holes. In addition, the utility model can meet the requirements of different roughness in the hole, ensure the bonding strength between the newly poured concrete in the hole and the original concrete, and thus ensure the quality of the project in the hole. Finally, the utility model is simple to operate and easy to use, and can greatly improve the construction efficiency and quality of concrete reserved holes.

[0058] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A concrete hole pre-drill with variable size, characterized in that: It includes a bracket, a center rod, a first nut, a second nut, a first positioning disc, a second positioning disc, a first scale rod, a second scale rod, a fixer, a controller and a coil; The bracket is fixed on the base surface and is used to support the center rod; The first nut and the second nut are threadedly connected to the center rod, and the thread rotation directions are opposite; The first positioning disc and the second positioning disc are installed on the central rod and are located between the first nut and the second nut; The first scale rod and the second scale rod are respectively hinged on the first nut and the second nut, respectively placed on the first positioning disc and the second positioning disc, and the first scale rod and the second scale rod are connected by a spring; The fixing device is fixedly connected to the first positioning disc and the second positioning disc, and the coiled skin is wound around the fixing device; The controller is fixed on the first scale rod, the second scale rod or the spring.

2. A variable-size concrete hole pre-drill according to claim 1, characterized in that: The bracket is rotatably connected to the central rod.

3. The variable-size concrete hole-preserving device according to claim 1, characterized in that: It also includes a guide rail rod, which passes through the first nut, the first positioning disc, the second positioning disc and the second nut in sequence for guiding.

4. The variable-size concrete hole-preserving device according to claim 1, characterized in that: The controller comprises a control ring and a control sheet. The control ring is fixedly connected to the first scale rod and the second scale rod, and the control sheet is fixedly connected to the spring.

5. The variable-size concrete hole-preserving device according to claim 1, characterized in that: The ends of the first scale rod and the second scale rod are both provided with through holes, and hooks are provided at both ends of the spring, and the two ends of the spring are respectively hung on the first scale rod and the second scale rod.

6. The variable-size concrete hole-preserving device according to claim 1, characterized in that: The roll skin is made of a thin iron sheet with a thickness of less than 0.5 mm, and is provided with notches on the outer surface, forming a tape measure structure.

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