Reinforcement Joint Grout Sealing with Check Valve
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Solution Overview
Problem
Existing grout-filled reinforcement joint methods face issues with grout leakage during injection, complex operation processes, and contamination of the outer wall surface due to muddy grout flow, leading to increased costs and time for deburring and confirming filling in multiple joints.
Innovation Solution
A joint method for reinforcing bars using a cylindrical reinforcement joint with a grout inlet and outlet, where a cylindrical sealing body with a check valve and a sealing plug with a pressure receiver and retaining end are used to prevent grout leakage and allow continuous injection, enabling automatic closure of the outlet and easy confirmation of filling without cutting the discharge pipe.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rubber stopper is fitted into the inlet to prevent grout leakage, then grout leakage is prevented, but the operation becomes complex and time-consuming requiring removal and reinstallation of the stopper
Solution Approach 1:
The check valve is designed to automatically close the inlet when grout flow stops, eliminating the need for manual stopper installation and removal. The valve self-regulates the grout flow based on pressure differential, providing reliable leakage prevention while simplifying the operation process.
2Reliability
If the discharge pipe is cut and bent for each single injection to stop grout leakage, then grout leakage is prevented, but the injection operation becomes complicated and cost increases
Solution Approach 1:
The check valve automatically closes the inlet based on grout flow conditions, eliminating the need for manual intervention to stop leakage. This self-regulating mechanism prevents grout leakage while maintaining simple, continuous injection operations without requiring pipe modification.
3Ease of operation
If the outlet is left open for grout filling, then grout can be easily confirmed to be filled, but muddy liquid flows outside contaminating the outer wall surface
Solution Approach 1:
The check valve automatically closes the outlet when grout flow stops, preventing muddy liquid from contaminating the outer wall surface. The valve maintains a simple structure that allows easy filling confirmation while eliminating the harmful contamination effect.
4Reliability
If injection is continued until muddy liquid is discharged outside, then grout becomes strong filling material, but the process takes time and the outer wall surface requires cleaning
Solution Approach 1:
The check valve automatically stops grout flow when the reinforcement joint is full, eliminating the need to continue injection until muddy liquid discharge. This self-regulating mechanism achieves proper grout filling and strength while significantly reducing the time required compared to continuous injection methods.
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
Prevents grout flow outside, allows continuous injection without interrupting the pump operation, and facilitates easy confirmation of grout filling in multiple joints, reducing operational complexity and costs while maintaining the appearance of the outer wall surface.
Implementation Method 1
a cylindrical sealing body constituted of an elastic body including a check valve provided at one end
Implementation Method 2
a piston body including a pressure receiver provided at a position protruding from the plug body of the shaft body and located inside
Data Source
AI summary
In a joint method for a reinforcing bar using a reinforcement joint having a grout inlet at one end and a grout outlet at the other end, the grout inlet is fitted with a sealing body provided with a check valve, and the grout outlet is fitted with a sealing plug provided with a piston body which is moved outward when the reinforcement joint is filled with grout, whereby the filling of the reinforcement joint can be visually confirmed.