Plastic Mounting Plug With Segmented Thread For Anchor Sleeve
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Solution Overview
Problem
Existing assembly plugs for anchor sleeves in concrete construction face challenges in easy detachment from concrete and inadequate protection against contaminants, leading to potential damage and unusable anchor points.
Innovation Solution
A mounting plug with a conical base body, self-locking external thread, and a sealing stop surface made of elastic material, which can be screwed into the anchor sleeve until a sealing contact is made, and features a through-channel for secure fastening to the formwork, allowing for easy removal and improved protection against contaminants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a threaded connection is used to secure the assembly plug to the anchor sleeve, then the assembly plug can be firmly fixed during concrete pouring, but fresh concrete and contaminants can penetrate into the threaded connection making detachment difficult
Solution Approach 1:
The threaded connection is segmented into two separate locations: one threaded connection secures the assembly plug to the formwork, while another threaded connection secures the anchor sleeve to the assembly plug. This segmentation allows the anchor sleeve to remain firmly fixed during concrete pouring while enabling easy detachment of the assembly plug by unscrewing it from the formwork, without contaminating the anchor sleeve's threaded connection.
Solution Approach 2:
The assembly plug serves as an intermediary component between the formwork and the anchor sleeve. It provides a threaded connection to the formwork for secure fixation during concrete pouring, while its removable nature allows it to act as a temporary mediator that can be detached without contaminating the anchor sleeve, thus resolving the contradiction between firm fixing and easy detachment.
2Object-affected harmful factors
If fiber cement pipes are used as protective sleeves, then the anchor sleeve is protected against contaminant ingress, but the protective sleeves can be accidentally damaged leading to leaky connections
Solution Approach 1:
The protective function is extracted from the fragile fiber cement pipe and transferred to the robust assembly plug and anchor sleeve components. The assembly plug provides structural protection during concrete pouring through its firm fixation to the formwork, while the anchor sleeve's threaded connection remains exposed but protected by the assembly plug's positioning, eliminating the need for vulnerable protective sleeves.
Solution Approach 2:
The assembly plug provides beforehand cushioning protection by being firmly fixed to the formwork with a threaded connection before concrete pouring begins. This pre-established secure connection protects the anchor sleeve from contaminant ingress during the concrete pouring process without relying on fragile protective sleeves that could be damaged.
3Manufacturing precision
If the assembly plug is firmly fixed to the formwork, then positioning accuracy is improved, but the plug becomes difficult to remove after concrete setting
Solution Approach 1:
The fixation system is segmented into a permanent threaded connection between the assembly plug and the formwork for firm positioning, and a removable threaded connection between the anchor sleeve and the assembly plug. This allows the assembly plug to remain firmly fixed to the formwork for accurate positioning during concrete pouring, while enabling easy removal of the assembly plug itself by unscrewing it from the formwork after the concrete has set.
4Strength
If the anchor sleeve is screwed onto the assembly plug, then secure mounting is achieved, but penetration of fresh concrete into the threaded connection prevents detachment
Solution Approach 1:
The threaded connections are segmented into two separate locations: one between the assembly plug and the formwork, and another between the anchor sleeve and the assembly plug. The anchor sleeve's threaded connection to the assembly plug provides secure mounting during concrete pouring, while the assembly plug's separate threaded connection to the formwork allows the assembly plug to be detached by unscrewing it from the formwork, leaving the clean anchor sleeve threaded connection intact for future use.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables easy and secure removal of the assembly plug from the concrete, prevents contaminant ingress, and maintains the anchor sleeve's integrity, reducing handling complexity and costs by eliminating the need for fiber cement pipes, while ensuring reliable positioning and corrosion protection.
Implementation Method 1
The mounting plug (10) has a conical base body (12) which has at its front end (14) with a threaded shaft (16) that can be screwed into the anchor sleeve and at its rear end (20) with a drive profile (22) for a turning tool. The mounting plug (10) has a longitudinal axis on its axis (24) arranged through channel (26) for fastening the mounting plug (10) to the formwork. An annular stop surface (34) for the anchor sleeve is arranged at the front end (14) of the base body (12) and protrudes in the radial direction beyond the threaded shaft (16).
Data Source
Figure 1
Figure 2~3
AI summary
The plug (10) has a conical base body (12) comprising a threaded shaft (16) at a front end (14) and a driving profile (22) i.e. hexagon head, for a rotating tool at a rear end (20). A passage channel (26) is axially extended through the body and the shaft and provided for fastening the plug to a framework. A ring-shaped stop surface (34) is arranged at the front end and provided for an anchor casing, where the stop surface projects in a radial direction over the shaft. The shaft has a shaft longitudinal section (38) and a self-locking outer thread (18), where the plug is made from plastic.