Opposed screw rod device for concrete shear wall form

Abstract

The utility model relates to the technical field of building engineering, concretely points to a kind of for concrete shear wall formwork to pull screw device. Including coaxially arranged inner rod and outer rod;The outer rod end portion is provided with the screw rod that projects along the axial direction;The circumferential outside end surface of the screw rod is provided with the buckle that projects along the radial direction;The end portion of the inner rod is provided with the clamping groove;The circumferential inside end surface of the clamping groove is provided with the limit board;The limit board is provided with the through-hole for the buckle to pass;The screw rod is inserted into clamping groove along the axial direction, and after the buckle passes through through-hole, rotate around the axis to limit the buckle on the side of limit board away from outer rod. The pull screw device of the application is simple in structure, convenient to operate and use, greatly simplifies the use operation of pull screw, and the tensioning and fixing of formwork are more stable, and adverse effects on wall surface cannot be caused.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, specifically to a tie rod device for concrete shear wall formwork. Background Technology

[0002] The pouring process for white fair-faced concrete shear walls is similar to that for ordinary silicate concrete, both using double-channel steel back bracing and tie rods to reinforce the formwork before pouring concrete. However, the difference lies in the use of mirror-finished steel formwork or film-coated plywood for white fair-faced concrete, which presents greater installation challenges and higher requirements.

[0003] The traditional tie rod structure is shown in the prior art entitled "A Sleeve-Type Detachable Water-Stop Tie Rod Connector". This tie rod connector includes a sleeve and a tie rod. A water-stop component is fitted around the outside of the sleeve, and the inner wall of the sleeve has threads for connecting the tie rods. Tie rods are connected to both ends of the sleeve, each tie rod partially protruding into the sleeve. Each tie rod has symmetrically arranged limiting grooves. A blind end, fixedly connected to the inner wall of the sleeve, is located between two tie rods in the middle of the sleeve. This tie rod connector allows the tie rods to be connected via the sleeve, facilitating installation, use, disassembly, and transportation. The blind end inside the sleeve and the water-stop component on the outside effectively prevent water leakage. The limiting grooves on the tie rods facilitate disassembly and installation. The structure is simple, easy to use, and only individual parts need to be replaced when damaged, saving costs. However, the screw connector structure also has some problems. On the one hand, the screw structure has a structural defect: after the subsequent pouring is completed, during the process of removing the screw structure, the cone used is directly poured into the concrete, but the cone itself is fixed to the screw in the axial direction, so the screw cannot be removed in actual use. On the other hand, given the extremely high requirements for the appearance quality of white fair-faced concrete, the holes and surrounding marks left by the screw structure are difficult to meet the almost stringent standards for its surface effect, and are prone to causing defects in appearance such as water loss, protrusion, and sanding, which seriously affect the unique decorative effect and building quality of white fair-faced concrete.

[0004] Therefore, there is an urgent need for a tie rod structure that can solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this application is to address the shortcomings of the aforementioned background technology and provide a tie rod device for concrete shear wall formwork.

[0006] The technical solution of this application is: a tie rod device for concrete shear wall formwork, comprising an inner rod and an outer rod arranged coaxially; the end of the outer rod is provided with a screw protruding along the axial direction; a buckle protruding radially is provided on the outer circumferential end face of the screw; the end of the inner rod is provided with a slot; a limiting plate is provided on the inner circumferential end face of the slot; a through hole is provided on the limiting plate for the buckle to pass through; the screw is inserted into the slot along the axial direction so that the buckle passes through the through hole and then rotates around the axis to restrict the buckle to the side of the limiting plate facing away from the outer rod.

[0007] According to the present application, a tie rod device for concrete shear wall formwork is provided, wherein the buckle includes a strip-shaped boss protruding radially from the tie rod; the through hole includes a central hole for the end of the tie rod to pass through and a strip-shaped hole for the boss to pass through.

[0008] According to the present application, a tie rod device for concrete shear wall formwork is provided, wherein the buckle includes two sets of bosses placed on both sides of the tie rod axis, and the two sets of bosses are symmetrically arranged with the tie rod axis as the center.

[0009] According to the tie rod device for concrete shear wall formwork provided in this application, both ends of the inner rod are provided with slots.

[0010] According to the present application, a tie rod device for concrete shear wall formwork is provided, wherein the outer circumference of the outer rod is provided with a sealing structure for preventing grout leakage from the formwork.

[0011] According to the present application, a tie rod device for concrete shear wall formwork is provided, wherein the sealing structure includes a gasket; the gasket is a conical annular structure with a smaller end near the buckle and a larger end away from the buckle, and the smaller end of the gasket is flush with the end of the outer rod where the tie rod is located.

[0012] According to the present application, a tie rod device for concrete shear wall formwork is provided, wherein the length of the tie rod between the buckle and the end of the outer rod is equal to the length of the groove between the side of the limiting plate facing away from the end of the inner rod and the end of the inner rod.

[0013] According to the present application, a tie rod device for concrete shear wall formwork is provided, wherein the length of the tie rod is equal to the length of the slot.

[0014] The advantages of this application are: 1. The tie rod device of this application has a simple structure, is easy to operate and use, greatly simplifies the use of the tie rod device, has a good bidirectional force fixing effect on the template, and has excellent stability. 2. The buckle of this application is a strip-shaped protrusion structure, which is simple in structure and can be easily inserted into the back side of the limiting plate through the strip-shaped hole. It is convenient to hook onto the back side of the limiting plate to form an axial limiting and fixing structure. Rotating the buckle can also easily disassemble the inner rod and the outer rod, making the operation very simple. 3. The buckle of this application consists of two sets of symmetrically arranged boss structures. When the symmetrically arranged boss structures are hooked onto the back of the limiting plate, they have good stress stability, are firmly hooked, and are not easy to loosen. 4. The inner rod of this application can have a slot at one end to form a two-section structure with an outer rod, or it can have slots at both ends to form a three-section structure with two outer rods. It has good applicability and can be applied to various construction scenarios. 5. This application has a sealing structure on the outer rod, which can prevent grout leakage during the concrete pouring process and prevent defects in the appearance and forming quality. 6. The gasket in this application has a conical structure, which can effectively seal the through holes on the template, with a large sealing range and very simple overall operation; 7. When the buckle hook of this application is hung on the limiting plate, it can make the end of the inner rod tightly abut against the end of the outer rod, preventing concrete from entering the outer rod and inner rod during pouring, and facilitating subsequent dismantling operations; 8. The length of the screw in this application is equal to the length of the slot, which facilitates the hooking operation of the buckle and the limiting plate or the removal from the slot, making the operation convenient and simple.

[0015] The tie rod device of this application has a simple structure and is easy to operate, which greatly simplifies the use of tie rods and makes the tensioning and fixing of the template more stable without causing adverse effects on the wall surface. It has great promotional value. Attached Figure Description

[0016] Figure 1 : A schematic diagram of the tie rod device structure (two-section type) of this application; Figure 2 : A schematic diagram of the tie rod device structure (three-section type) of this application; Figure 3 : A schematic cross-sectional view of the screw and buckle in this application; Figure 4 : A schematic cross-sectional view of the limiting plate in this application; Wherein: 1—inner rod; 11—slot; 12—limiting plate; 13—through hole; 2—Outer rod; 21—Screw; 22—Snap fastener; 23—Washer. Detailed Implementation

[0017] The embodiments of this application are described in detail below, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0018] In the description of this application, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 application and simplifying the description, and do not indicate or imply that the device or element 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 application.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0020] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] This application relates to a tie rod device for concrete shear wall formwork. The tie rod device is used to fix the formwork during the shear wall pouring process, passing through the formwork to maintain the pouring space within it. The tie rod device has a simple structure and is easy to use. During the tensioning and fixing of the formwork, axial tensioning of the tie rod device can be achieved simply by rotating it around its axis. After the shear wall pouring is completed, the tie rod device can be removed simply by rotating it again. The operation is very simple, simplifying the use of the tie rod device. Furthermore, the tie rod device does not cause defects or adverse effects on the front of the shear wall after use, thus improving the construction quality of the shear wall.

[0022] Specifically, such as Figures 1-4 As shown, a tie rod device for concrete shear wall formwork according to this application includes an inner rod 1 and an outer rod 2 arranged coaxially. The outer rod 2 has a screw 21 protruding axially at its end. The outer end face of the screw 21 has a buckle 22 protruding radially. The inner rod 1 has a groove 11 at its end. The inner end face of the groove 11 has a limiting plate 12. The limiting plate 12 has a through hole 13 for the buckle 22 to pass through. The screw 21 is inserted axially into the groove 11 so that the buckle 22 passes through the through hole 13 and then rotates around the axis to restrict the buckle 22 to the side of the limiting plate 12 facing away from the outer rod 2.

[0023] In actual use, the inner rod 1 and the outer rod 2 are placed on both sides of the template. The screw 21 at the end of the outer rod 2 is inserted through the template into the slot 11 at the end of the inner rod 1, so that the buckle 22 on the screw 21 is aligned with the through hole 13 on the limiting plate 12. The buckle 22 is passed through the limiting plate 12, so that the buckle 22 moves to the side of the limiting plate 12 away from the outer rod 2. Then the outer rod 2 is rotated, so that the screw 21 and the buckle 22 rotate around the axis. The buckle 22 and the through hole 13 no longer overlap in the axial direction. The buckle 22 is hooked on the side of the limiting plate 12 away from the outer rod 2. The inner rod 1 and the outer rod 2 are fixed together in the axial direction. After the shear wall is poured, rotate the outer rod 2 so that the screw 21 and the buckle 22 rotate around the axis. The buckle 22 overlaps with the through hole 13 in the axial direction. Pull the outer rod 2 outward along the axial direction. The screw 21 and the buckle 22 move outward along the axial direction. The buckle 22 passes through the through hole 13 and moves out of the slot 11.

[0024] In some embodiments of this application, the above-described buckle 22 structure has been optimized, specifically, as follows: Figure 1 , 2 As shown in Figure 3, the snap fastener 22 includes a strip-shaped boss protruding radially from the screw 21, and the through hole 13 includes a central hole for the end of the screw 21 to pass through and a strip-shaped hole for the boss to pass through, as shown in Figure 3. Figure 4 As shown. The strip-shaped boss can be easily hooked onto the back side of the limiting plate 12. The boss can pass through the strip-shaped hole along the axial direction. Its structure is simple, it is very convenient to operate and use, and it is also easy to process.

[0025] In addition, the buckle 22 in this embodiment includes two sets of bosses located on both sides of the axis of the screw 21, and the two sets of bosses are symmetrically arranged with the axis of the screw 21 as the center. The symmetrically arranged bosses can be balanced by force when hooking the limiting plate 12, and will not generate bending moment, so that the inner rod 1 and the outer rod 2 are fastened together in the axial direction, and the structure has excellent stress stability.

[0026] In other embodiments of this application, the structure of the pull screw device is optimized. That is, the pull screw device of this embodiment can be a two-section structure, that is, a groove 11 is provided at one end of the inner rod 1, and one inner rod 1 and one outer rod 2 form a pull screw device; the pull screw device of this embodiment can also be a three-section structure, that is, grooves 11 are provided at both ends of the axial direction of the inner rod 1, and one inner rod 1 and two outer rods 2 form a pull screw device.

[0027] If the tie rod device has a three-section structure, in actual use, a sleeve can be installed on the outside of the inner rod 1. During the pouring process, the sleeve is poured into the concrete wall, and the inner rod 1 can be pulled out from the sleeve to complete the recycling.

[0028] In a further embodiment of this application, a sealing structure for preventing grout leakage from the template is provided on the outer circumference of the outer rod 2. Specifically, as shown... Figure 1 and 2 As shown, the sealing structure includes a gasket 23. The gasket 23 is a conical ring structure with a smaller end near the buckle 22 and a larger end away from the buckle 22. The small end of the gasket 23 is flush with the end of the outer rod 2 where the screw 21 is located.

[0029] Because the shim 23 is a tapered structure with a smaller end closer to the template and a larger end further away from the template, when installing the outer rod 2, the smaller end of the shim 23 can be easily inserted into the hole on the template. The shim 23 seals the hole on the template, preventing concrete slurry from flowing to the other side of the template through the hole during concrete pouring, thus avoiding affecting the pouring quality. Moreover, during the removal of the outer rod 2, because the outer rod 2 is moved outward along the axial direction, the tapered shim 23 can be easily removed from the hole in the template without adversely affecting the poured wall surface.

[0030] In a preferred embodiment of this application, the structure of the buckle 22 and screw 21 described above is optimized. In this embodiment, the length of the screw 21 between the buckle 22 and the end of the outer rod 2 is equal to the length of the groove 11 between the side of the limiting plate 12 facing away from the end of the inner rod 1 and the end of the inner rod 1. That is, when the buckle 22 passes through the through hole 13 and enters the back side of the limiting plate 12, the side of the buckle 22 facing the outer rod 2 is flush with the back side of the limiting plate 12 in the axial direction. At this time, rotating the buckle 22 can tightly hook the buckle 22 onto the back side of the limiting plate 12, and the end of the inner rod 1 is tightly attached to the end of the outer rod 2, which prevents concrete slurry from entering the groove 11 from the gap between the inner rod 1 and the outer rod 2 during the pouring process, thus facilitating subsequent dismantling work.

[0031] In this embodiment, the length of the screw 21 is equal to the length of the slot 11. That is, after the screw 21 abuts against the end face of the slot 11, it means that the buckle 22 has moved into place and can be rotated to realize the hooking operation between the buckle 22 and the limiting plate 12.

[0032] In practical use, the tie rod device for concrete shear wall formwork of this application can be operated according to the following steps: The inner rod 1 and outer rod 2 are placed on both sides of the formwork. If it is a three-section tie rod device, a sleeve is fitted on the outside of the inner rod 1; the screw 21 at the end of the outer rod 2 is inserted through the formwork into the slot 11 at the end of the inner rod 1, so that the buckle 22 on the screw 21 is aligned with the through hole 13 on the limiting plate 12; the buckle 22 is then passed through the limiting plate 12, so that the... The buckle 22 moves to the side of the limiting plate 12 opposite to the outer rod 2 until the end of the screw 21 abuts against the end face of the slot 11. Then, the outer rod 2 is rotated so that the screw 21 and the buckle 22 rotate around the axis. The buckle 22 and the through hole 13 no longer overlap in the axial direction. The buckle 22 is hooked on the side of the limiting plate 12 opposite to the outer rod 2. The inner rod 1 and the outer rod 2 are fixed together in the axial direction. The small end of the gasket 23 is inserted into the hole on the template to seal the hole on the template. If a three-section structure is used, install the outer rod 2 on the other side in the manner described above; After installation, pour concrete into the template. Once the concrete has completely solidified and stabilized to form a shear wall, rotate the outer rod 2 so that the screw rod 21 and the buckle 22 rotate around the axis. The buckle 22 overlaps with the through hole 13 in the axial direction. Pull the outer rod 2 outward along the axial direction. The screw rod 21 and the buckle 22 move outward along the axial direction. The buckle 22 passes through the through hole 13 and moves out of the slot 11. If it is a three-section structure, remove the outer rod 2 on the other side according to the above method. Then pull the inner rod 1 out of the sleeve. After removing the tie rod device, start removing the template and complete the pouring construction of the shear wall.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this application. Various changes and modifications can be made to this application without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of this application as claimed. The scope of protection of this application is defined by the appended claims and their equivalents.

Claims

1. A pair of tensioning screw devices for concrete shear wall formworks, characterized in that: The device includes an inner rod (1) and an outer rod (2) arranged coaxially. The outer rod (2) has a screw (21) that protrudes axially at its end. The outer end face of the screw (21) has a buckle (22) that protrudes radially. The inner rod (1) has a slot (11) at its end. The inner end face of the slot (11) has a limiting plate (12). The limiting plate (12) has a through hole (13) for the buckle (22) to pass through. The screw (21) is inserted into the slot (11) axially so that the buckle (22) passes through the through hole (13) and then rotates around the axis to restrict the buckle (22) to the side of the limiting plate (12) facing away from the outer rod (2).

2. A tensioning screw device for concrete shear wall formwork as claimed in claim 1 wherein: The buckle (22) includes a strip-shaped boss that protrudes radially from the screw (21); the through hole (13) includes a central hole through which the end of the screw (21) passes and a strip-shaped hole through which the boss passes.

3. A tensioning screw device for a concrete shear wall form according to claim 2, wherein: The buckle (22) includes two sets of bosses placed on both sides of the axis of the screw (21), and the two sets of bosses are symmetrically arranged with the axis of the screw (21) as the center.

4. The tie rod device for concrete shear wall formwork as described in claim 1, characterized in that: The inner rod (1) has slots (11) at both ends of its axial direction.

5. A tensioning screw device for a concrete shear wall form according to claim 1, wherein: The outer circumference of the outer rod (2) is provided with a sealing structure to prevent grout leakage from the template.

6. A tensioning screw device for a concrete shear wall form according to claim 5, wherein: The sealing structure includes a gasket (23); the gasket (23) is a conical ring structure with a smaller end near the buckle (22) and a larger end away from the buckle (22), and the small end of the gasket (23) is flush with the end of the outer rod (2) where the screw (21) is located.

7. A tensioning screw device for a concrete shear wall form according to claim 1, wherein: The length of the screw (21) between the buckle (22) and the end of the outer rod (2) is equal to the length of the groove (11) between the side of the limiting plate (12) facing away from the end of the inner rod (1) and the end of the inner rod (1).

8. A tensioning screw device for a concrete shear wall form according to claim 1, wherein: The length of the screw (21) is equal to the length of the slot (11).

Images