An inner formwork limiting device for a hollow precast pier
Patent Information
- Application Number
- CN202522365453.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-07
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-11-07
AI Technical Summary
[0002]空心预制墩柱浇筑前外模板和内模板均竖立在预制台座上，内模板支顶在预制台座的横框板内侧框架槽边，通常用卡箍或螺杆限位固定两者，空心预制墩柱的内模板内横断面空间尺寸较小，固定内模板于横框板内侧框架槽边时，需派瘦小体形施工人员从竖立的内模板上端开口进入竖立的内模板下端进行限位固定操作，施工人员需要借助吊具反复吊出和吊入内模板中进行调整，降低了内模板的安装效率，安全性差，费时费力，影响混凝土施工进度，降低了工程效率
与现有技术相比，本实用新型能达到的有益效果是：
Smart Images
Figure CN224915021U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an inner formwork limiting device for hollow precast piers. Background Technology
[0002] Before the hollow precast pier column is poured, both the outer and inner formwork are erected on the precast platform. The inner formwork is supported on the inner frame groove of the horizontal frame plate of the precast platform. They are usually fixed with clamps or screws. The cross-sectional space of the inner formwork of the hollow precast pier column is small. When fixing the inner formwork to the inner frame groove of the horizontal frame plate, it is necessary to send a slender construction worker to enter the lower end of the vertical inner formwork from the upper opening of the vertical inner formwork to perform the limiting and fixing operation. The construction worker needs to use a hoist to repeatedly lift out and lift in the inner formwork for adjustment, which reduces the installation efficiency of the inner formwork, has poor safety, is time-consuming and labor-intensive, affects the concrete construction progress, and reduces the project efficiency. Summary of the Invention
[0003] The purpose of this invention is to design an inner formwork limiting device for hollow precast piers, which solves the above-mentioned shortcomings. It can quickly limit the inner formwork from the outside and has the advantages of simple structure, time and labor saving, high construction efficiency, good safety and good use effect.
[0004] Therefore, an inner formwork limiting device for hollow precast piers includes a precast platform, a screw, and an inner formwork. The inner formwork limiting device consists of a screw and a retaining ring. The retaining ring is U-shaped. One end of the screw is integrated with one side of the retaining ring, and the U-shaped opening of the retaining ring faces the other end of the screw. The other end of the screw is provided with a threaded part, on which a fixing nut is screwed. The vertical support plate of the precast platform is provided with a through hole for the screw to pass through. The space between the two inner sides of the U-shaped opening retaining ring is a retaining groove space. The height of the retaining groove space is adapted to the sum of the thickness of the bottom side of the inner formwork support frame and the thickness of the inner side of the upper horizontal frame plate groove.
[0005] As a preferred technical solution of this utility model, the prefabricated platform is composed of horizontal frame plates and vertical support plates. Two adjacent horizontal frame plates are connected by vertical support plates, and the inner side of each vertical support plate forms the frame groove of the prefabricated platform.
[0006] As a preferred embodiment of this utility model, the threaded end of the screw passes through the through hole on the vertical support plate and is located outside the prefabrication base.
[0007] As a preferred embodiment of this utility model, the screw can rotate within the through hole of the vertical support plate.
[0008] As a preferred embodiment of this utility model, the retaining ring is a steel retaining ring with a thickness of not less than 3cm. Compared with the prior art, the beneficial effects that this utility model can achieve are: 1. This utility model solves the problem of requiring personnel to enter the lower part of the vertical inner template to limit and fix the inner template on the precast platform. In use, the retaining ring is located in the frame groove of the precast platform. After each screw passes through the corresponding through hole on the vertical support plate, a fixing nut is screwed on each screw. After the bottom side of the inner template support frame is supported by the inner frame groove of the upper horizontal frame plate of the precast platform, the screws are rotated so that the bottom side of the inner template support frame and the inner frame groove of the upper horizontal frame plate are simultaneously engaged in the retaining groove space in the retaining ring. Then the fixing nut is tightened so that the bottom side of the inner template support frame on all four sides of the inner template and the inner frame groove of the corresponding upper horizontal frame plate are simultaneously engaged in the retaining groove space in the retaining ring and fixed and tightened, thereby achieving the inner template limit and fixation. The reverse operation is demolding.
[0009] This invention allows a single construction worker to complete the limiting and fixing of the inner formwork and dismantling the formwork from the side of the precast platform, which greatly improves the construction efficiency of the inner formwork and avoids the need for personnel to enter the pier to operate. It has the advantages of high safety, time and labor saving and good use effect.
[0010] 2. This utility model can be applied to the internal formwork limiting and fixing and demolding of hollow piers of different sizes and cross sections during prefabrication construction, and has a wide range of applications.
[0011] 3. This utility model has a simple structure, low manufacturing cost, convenient installation and disassembly, and simple operation. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 A schematic diagram of the left side structure; Figure 3 for Figure 1 A schematic diagram of the structure on the right side; Figure 4 This is a schematic diagram of the structure of this utility model in use. Detailed Implementation Plan
[0013] The present invention will be further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of the present invention and not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of the present invention. Unless otherwise specified, the materials, reagents, etc., used in the following embodiments are commercially available. Furthermore, unless otherwise explicitly stated and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.
[0014] like Figures 1 to 4 As shown, an inner formwork limiting device for hollow precast piers includes a precast platform, a screw rod, and an inner formwork 5. The inner formwork limiting device consists of a screw rod 2 and a retaining ring 4. The retaining ring 4 is U-shaped, made of steel, and has a thickness of not less than 3 cm. One end of the screw rod 2 is integrated with one side of the retaining ring, and the U-shaped opening of the retaining ring faces the other end of the screw rod. The other end of the screw rod has a threaded portion, on which a fixing nut 1 is screwed. The vertical support plate 7 of the precast platform has a through hole 9 for the screw rod to pass through, allowing the screw rod to rotate within the through hole. The two inner sides of the U-shaped retaining ring form a slot space 3. The height of the slot space 3 is adapted to the sum of the thickness of the bottom side 8 of the inner formwork support frame and the thickness of the inner frame groove of the upper horizontal frame plate 6, so as to facilitate the insertion of both into the slot space. The screw rod end with the threaded portion passes through the through hole 9 on the vertical support plate and is located outside the precast platform.
[0015] The precast platform consists of horizontal frame plates and vertical support plates. Two adjacent horizontal frame plates 6 are connected by vertical support plates 7. The inner side of each vertical support plate forms the frame groove 10 of the precast platform.
[0016] In use, the retaining ring 4 is located in the frame groove 10 of the precast platform. After each screw passes through the corresponding through hole on the vertical support plate, a fixing nut 1 is screwed on. After the bottom side 8 of the inner template support frame is supported on the inner side frame groove 10 of the upper horizontal frame plate 6 of the precast platform, the screws 2 are rotated so that the bottom side of the inner template support frame and the inner side frame groove of the upper horizontal frame plate are simultaneously engaged in the retaining groove space in the retaining ring. Then the fixing nut is tightened so that the bottom side of the inner template support frame on all four sides of the inner template and the inner side frame groove of the corresponding upper horizontal frame plate are simultaneously engaged in the retaining groove space in the retaining ring and fixed and tightened, so as to realize the inner mold limit and fixation. The reverse operation is demolding.
[0017] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.
Claims
1. A limiting device for inner formwork of hollow precast piers, comprising a precast platform, a screw rod, and an inner formwork, characterized in that: The inner mold limiting device consists of a screw and a retaining ring. The retaining ring is U-shaped. One end of the screw is integrated with one side of the retaining ring. The U-shaped opening of the retaining ring faces the other end of the screw. The other end of the screw is provided with a threaded part, and a fixing nut is screwed onto the threaded part. The vertical support plate of the precast platform is provided with a through hole for the screw to pass through. The space on the two inner sides of the U-shaped opening retaining ring is a retaining groove space. The height of the retaining groove space is adapted to the sum of the thickness of the bottom side of the inner mold support frame and the thickness of the inner side of the upper horizontal frame plate groove.
2. The inner formwork limiting device for hollow precast piers according to claim 1, characterized in that: The prefabricated platform consists of horizontal frame plates and vertical support plates. Two adjacent horizontal frame plates are connected by vertical support plates, and the inner side of each vertical support plate forms the frame groove of the prefabricated platform.
3. The inner formwork limiting device for hollow precast piers according to claim 1, characterized in that: One end of the screw passes through a through hole in the vertical support plate and is located outside the prefabrication base.
4. The inner formwork limiting device for hollow precast piers according to claim 1, characterized in that: The screw can rotate within the through hole of the vertical support plate.
5. The inner formwork limiting device for hollow precast piers according to claim 1, characterized in that: The retaining ring is a steel retaining ring with a thickness of not less than 3cm.