Steel connecting piece for external concrete wall formwork

Abstract

The utility model discloses a steel connecting piece for external hanging concrete wall formwork erecting in the technical field of concrete pouring formwork erecting, a pull rod is fixed on the surface of a poured concrete wall through an anchoring piece, and the installation positions of the pull rod and the anchoring piece are staggered on the fixing face of a base and the concrete wall. The casting precision requirement of bare concrete is met, screw holes, exposed joints and cicada joints can be horizontally and vertically arranged, the appearance is uniform, main body structure steel bars of an original concrete wall cannot be damaged in the drilling process, the overall structure is simple, and cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete pouring formwork, in particular to a steel connecting piece for external concrete wall formwork. Background Art

[0002] During the pouring of concrete walls, it is necessary to build a mold to limit the shape of the concrete. In order to enable the mold to withstand the huge lateral pressure of the concrete during the pouring process, it is necessary to set several horizontal tie rods on the mold to prevent the mold from exploding during the pouring process.

[0003] With the continuous development of domestic concrete technology, the increasing requirements for building energy conservation, material saving and intensiveness, as well as the increasing attention to green building materials and green buildings, fair-faced concrete technology has become more and more popular in the industry. However, the cost of fair-faced concrete is too high. Therefore, fair-faced concrete is mostly used for the exterior walls of buildings, and ordinary concrete is used for the main body. This requires the main body and exterior walls of the building to be constructed in different time periods.

[0004] The two ends of the tie rod of the conventional construction concrete mold are fixed on the two opposite templates to achieve opposite pulling. However, when the concrete is poured in stages, the template cannot be built on the side of the main concrete wall that has been poured. Therefore, a special construction method is required to install the tie rod. There are currently three commonly used methods. The first is pre-embedded sleeves, but the precision requirements of plain concrete during construction are stricter than those of ordinary structural concrete. The pre-embedded sleeves will be displaced due to the vibration of the vibrating rod during the pouring of the main concrete, and the layout accuracy cannot meet the construction requirements of plain concrete (the allowable error of decorative plain concrete is not more than 2mm). The second is the later welding of embedded ear plates, but the positioning and fixing of the ear plates is difficult, the welding requirements are high, and weld flaw detection is required. The cost and technical requirements are too high. The third is drilling, opening a water drill on the original main structure beams and columns, but it will damage the main structure's stress-bearing steel bars and affect the structural safety.

[0005] Based on this, the utility model designs a steel connector for external concrete wall formwork to solve the above problems. Utility Model Content

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a steel connector for external concrete wall formwork, the connector comprising a base, an anchor and a tie rod, a hole is opened on the surface of the concrete wall that has been cast to install the anchor, and the base is connected to the anchor so that the base is fixed to the surface of the concrete wall, one end of the tie rod is fixedly connected to the base, and the other end is connected to the formwork to transfer the lateral pressure exerted on the formwork to the base, and the installation positions of the tie rod and the anchor are staggered on the fixing surface of the base and the concrete wall.

[0007] As a further solution of the utility model, a through hole is opened on the surface of the base, and the anchor is passed through the through hole to press the base against the surface of the concrete wall, or the anchor is fixed to the surface of the base.

[0008] As a further solution of the utility model, at least two anchors are installed on the surface of the base, and the installation position of the pull rod on the surface of the base is between the anchors.

[0009] As a further solution of the utility model, the anchors are arranged at equal intervals around the circumference of the axis of the pull rod.

[0010] As a further solution of the utility model, a connecting tube is fixedly provided on the surface of the base, and the pull rod is threadedly engaged in the connecting tube.

[0011] As a further solution of the utility model, a protrusion is provided on the base, and a mounting hole for the pull rod to pass through is opened on the side of the protrusion parallel to the concrete wall. The pull rod is inserted into the mounting hole, and the part of the pull rod entering the inner cavity of the protrusion and the part not entering the inner cavity of the protrusion are both installed with clamping parts. The two clamping parts clamp the side of the protrusion parallel to the concrete wall to fix the pull rod to the base.

[0012] As a further solution of the utility model, one end of the pull rod away from the base is threadedly engaged with a leak-proof member for contacting the formwork to prevent concrete from leaking out.

[0013] As a further solution of the utility model, a rubber pad is provided on a side of the leak-proof member away from the base to enhance the leak-proof effect.

[0014] As a further solution of the utility model, a threaded hole for threaded engagement with the pull rod is opened at one end of the leakage prevention component, and a connecting rod for connecting with the template is fixedly connected to the other end.

[0015] As a further solution of the utility model, the leak-proof part is made of hard plastic material.

[0016] The utility model has the following beneficial effects:

[0017] The base is fixed to the surface of the concrete wall by anchoring it with anchor pieces, and then the tie rod is fixedly connected to the base. In this way, the tie rod is installed on the surface of the concrete wall that has been poured. During the formwork construction process, it is connected to the formwork through the tie rod. During the subsequent concrete pouring process, the lateral pressure of the concrete on the formwork will be transmitted to the already poured concrete wall through the tie rod, the base and the anchor pieces, so as to prevent the mold from bursting during the pouring process. The connecting parts in this scheme have high installation accuracy and meet the pouring accuracy requirements of plain concrete. The screw eyes, open seams and cicada seams can be horizontal and vertical with a unified appearance. The installation positions of the tie rods and anchor pieces are staggered, and the openings for installing the anchor pieces can be staggered with the original main structure beams and columns, which will not damage the stress-bearing steel bars of the main structure. The overall structure is simple and the cost is low.

[0018] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] Figure 2 Schematic diagram of the split structure of the pull rod and the base.

[0022] Figure 3 It is a structural schematic diagram of the connecting tube.

[0023] Figure 4 It is a schematic diagram of the separation structure of the leakage-proof part and the pull rod.

[0024] Figure 5 Schematic diagram of the connection between the tie rod and the template.

[0025] Legend:

[0026] 1. Base; 11. Through hole; 12. Connecting tube; 13. Protrusion; 131. Mounting hole; 2. Anchor piece; 3. Pull rod; 31. Clamping part; 32. Leakage-proof part; 321. Rubber pad; 322. Connecting rod. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. However, the present invention can be implemented in a variety of different ways as defined and covered below.

[0028] See also Figure 1-5The utility model provides a technical solution: a steel connector for external concrete wall formwork, the connector includes a base 1, an anchor 2 and a tie rod 3, a hole is opened on the surface of the concrete wall that has been cast to install the anchor 2, and the base 1 is connected to the anchor so that the base 1 is fixed to the surface of the concrete wall, one end of the tie rod 3 is fixedly connected to the base 1, and the other end is connected to the formwork to transfer the lateral pressure exerted on the formwork to the base 1, and on the fixing surface of the base 1 and the concrete wall, the installation positions of the tie rod 3 and the anchor 2 are staggered.

[0029] In this embodiment, the base 1 is fixed to the surface of the concrete wall by means of anchors 2, and the tie rods 3 are fixed to the surface of the base 1. Figure 5 As shown, the end of the tie rod 3 away from the base 1 is connected to the template through a nut, a butterfly buckle, and the main ribs and secondary ribs on the back of the template. In the subsequent concrete pouring process, the lateral pressure of the concrete on the template will be transmitted to the base 1 through the tie rod 3, and then transmitted to the already poured concrete wall through the base 1, so as to prevent the template from bursting during the pouring process. The tie rod 3 is installed on the surface of the already poured concrete wall through the base 1 and the anchor 2. After the installation is completed, the position will not be affected by other processes, and the precision is high, especially when it is used for casting of plain concrete. In order to ensure that the screw eyes, open seams and cicada seams are horizontal and vertical, and have a unified appearance, because the tie rod 3 is fixed on the surface of the main concrete wall that has been cast, when installing the base 1, it is only necessary to drill a hole on the surface of the concrete wall that has been cast. Since the installation positions of the tie rod 3 and the anchor 2 are staggered, the holes used to install the anchor 2 can be staggered from the original main structure beams and columns, and will not damage the stress-bearing steel bars of the main structure. Then the anchor 2 is anchored in the hole, and the base 1 can be easily installed on the concrete wall surface. The anchor 2 can use expansion bolts, which have a simple structure and low cost.

[0030] like Figure 1-2 As shown, a through hole 11 is opened on the surface of the base 1, and the anchor 2 is inserted into the through hole 11 to press the base 1 tightly against the surface of the concrete wall.

[0031] In this embodiment, the anchor 2 is designed to be separate from the base 1, and the anchor 2 can be anchored on the surface of the concrete wall first. The anchor 2 can use an expansion bolt, and the threaded end of the expansion bolt is inserted into the through hole 11 opened in the base 1. Finally, the nut is engaged with the expansion bolt thread to tighten the base 1. The base 1 and the anchor 2 can be installed in different times, which is more flexible and convenient during installation.

[0032] like Figure 1-2 As shown, at least two anchors 2 are installed on the surface of the base 1 , and the installation position of the pull rod 3 on the surface of the base 1 is between the anchors 2 .

[0033] In this embodiment, the base 1 is fixed to the surface of the concrete wall by at least two anchors 2, and then the tie rod 3 is installed on the surface of the base 1 and between the anchors 2. In this way, when the tie rod 3 is subjected to the lateral pressure of the concrete, the multiple anchors 2 can ensure that the base 1 does not deform, ensure the stability of the connection between the tie rod 3 and the formwork, and ensure construction safety.

[0034] like Figure 1-2 As shown, the anchors 2 are arranged at equal intervals around the axial circumference of the pull rod 3.

[0035] In this embodiment, the anchors 2 are arranged at equal intervals around the circumference of the axis of the pull rod 3, and the distances from all anchors 2 to the axis of the pull rod 3 are the same. At the same time, the spacing between the anchors 2 is the same. When the pull rod 3 transfers the force it is subjected to to the base 1, the base 1 can evenly disperse this force to the base 1 itself, thereby increasing the stability of the base 1 during operation. At the same time, the line connecting the axes of the two relative anchors 2 just passes through the axis of the pull rod 3. When installing the integral connecting part, the position of the pull rod 3 can be better controlled, thereby increasing the accuracy of the installation position of the pull rod 3.

[0036] like Figure 3 As shown, a connecting tube 12 is fixedly provided on the surface of the base 1 , and the pull rod 3 is threadedly engaged in the connecting tube 12 .

[0037] In this embodiment, a connecting tube 12 is fixedly arranged on the surface of the base 1, and the pull rod 3 is threadedly engaged in the connecting tube 12, so that the pull rod 3 and the base 1 are fixedly installed. The connecting tube 12 can increase the contact area with the pull rod 3 and increase the bending resistance of the pull rod 3 in the vertical and horizontal directions. When the pull rod 3 is threadedly engaged with the threaded tube, the connecting tube 12 can increase the threaded engagement area and increase the reliability of the connection between the pull rod 3 and the base 1.

[0038] like Figure 1-2 As shown, a protrusion 13 is provided on the base 1, and a mounting hole 131 for the pull rod 3 to pass through is opened on one side of the protrusion 13 parallel to the concrete wall. The pull rod 3 is inserted into the mounting hole 131, and the part of the pull rod 3 entering the inner cavity of the protrusion 13 and the part not entering the inner cavity of the protrusion 13 are both installed with clamping parts 31. The two clamping parts 31 clamp the side of the protrusion 13 parallel to the concrete wall to fix the pull rod 3 to the base 1.

[0039] In this embodiment, the pull rod 3 passes through the mounting hole 131 and enters the inner cavity of the protrusion 13, and then the protrusion 13 on the base 1 is clamped by the clamping part 31 on the side parallel to the concrete wall to achieve a fixed connection between the pull rod 3 and the base 1. The clamping part 31 can adopt a nut, and an external thread is provided on one end of the pull rod 3 inserted into the inner cavity of the protrusion 13, and the nut is threadedly engaged with the pull rod 3.

[0040] like Figure 1-3As shown, one end of the tie rod 3 away from the base 1 is threadedly engaged with a leak-proof member 32 for contacting with the formwork to prevent concrete from leaking out.

[0041] In this embodiment, a leak-proof part 32 is threadedly engaged on the tie rod 3. During the process of connecting the tie rod 3 with the mold, the tie rod 3 needs to completely penetrate the mold, which requires opening a hole on the surface of the mold and using the leak-proof part 32 to press against the side of the mold facing the base 1, thereby preventing concrete from leaking out during the pouring process.

[0042] like Figure 1-3 As shown, a rubber pad 321 is provided on a side of the leak-proof member 32 away from the base 1 to enhance the leak-proof effect.

[0043] In this embodiment, the rubber pad 321 is fitted to the surface of the template to increase the leak-proof effect.

[0044] like Figure 4 As shown, one end of the leakage-proof member 32 is provided with a threaded hole for threaded engagement with the pull rod 3, and the other end is fixedly connected with a connecting rod 322 for connecting with the template.

[0045] In this embodiment, the leak-proof part 32 is threadedly connected to the end of the pull rod 3 away from the base through a threaded hole. After the pouring work is completed and the mold is removed, the leak-proof part 32 can be rotated to separate the leak-proof part from the surface of the poured concrete wall, leaving screw holes on the surface of the poured plain concrete wall.

[0046] The leak-proof member 32 is made of hard plastic material.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Steel connector for external concrete wall formwork, characterized in that: The connecting piece comprises: A base (1) for fixing to a concrete wall; An anchor (2), one end of which is anchored in the poured concrete wall, and the other end of which is connected to the base (1) to fix the base (1) on the surface of the concrete wall; A pull rod (3), one end of which is fixedly connected to the base (1), and the other end of which is used to connect to the template to transmit the lateral pressure exerted on the template to the base (1); On the fixing surface between the base (1) and the concrete wall, the installation positions of the pull rod (3) and the anchor (2) are staggered.

2. The steel connector for external concrete wall formwork according to claim 1 is characterized in that: A through hole (11) is provided on the surface of the base (1), and the anchor (2) is inserted into the through hole (11) to press the base (1) against the surface of the concrete wall.

3. The steel connector for external concrete wall formwork according to claim 1 is characterized in that: At least two anchors (2) are installed on the surface of the base (1), and the anchors (2) are arranged at equal intervals around the circumference of the axis of the pull rod (3).

4. The steel connector for external concrete wall formwork according to claim 1 is characterized in that: A connecting tube (12) is fixedly arranged on the surface of the base (1), and the pull rod (3) is threadedly engaged in the connecting tube (12).

5. The steel connector for external concrete wall formwork according to claim 1 is characterized in that: The base (1) is provided with a protrusion (13), and a mounting hole (131) for the pull rod (3) to pass through is opened on one side of the protrusion (13) parallel to the concrete wall. The pull rod (3) is inserted into the mounting hole (131), and the part of the pull rod (3) that enters the inner cavity of the protrusion (13) and the part that does not enter the inner cavity of the protrusion (13) are both installed with clamping parts (31). The two clamping parts (31) clamp the side of the protrusion (13) parallel to the concrete wall to fix the pull rod (3) to the base (1).

6. The steel connector for external concrete wall formwork according to claim 1 is characterized in that: One end of the pull rod (3) away from the base (1) is threadedly engaged with a leak-proof member (32) for contacting the formwork to prevent concrete from leaking out.

7. The steel connector for external concrete wall formwork according to claim 6 is characterized in that: One end of the leak-proof part (32) is provided with a threaded hole for threaded engagement with the pull rod (3), and the other end is fixedly connected with a connecting rod (322) for connecting with the template.

8. The steel connector for external concrete wall formwork according to claim 7 is characterized in that: The leak-proof component (32) is made of hard plastic material.

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