Flexible Hose Coupling Nut Mounting Without Welding
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Solution Overview
Problem
Existing flexible hose connections, such as those in sprinkler systems, require welding for a secure and tight seal, which is complex and may not be necessary, and existing methods for mounting union sleeve elements do not allow for simple secure connections without additional sealing means.
Innovation Solution
A flexible hose with a smoothed end section, a support sleeve, and a clamping sleeve that fixes the braid, allowing the cap sleeve element to connect mechanically without welding, using the braiding to transmit forces and ensuring a secure connection through a stop element that prevents the cap sleeve from being pulled off, with optional sealing elements for pressure-tight connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If welding is used to connect the sleeve to the hose, then a secure and tight seal is achieved, but the manufacturing process becomes complex and time-consuming
Solution Approach 1:
The patent replaces the welding process (thermal/chemical connection) with a mechanical clamping system consisting of a clamping sleeve and support sleeve that secure the hose to the fitting through mechanical pressure and friction, eliminating the need for welding equipment and processes
Solution Approach 2:
The connection system is divided into separate functional components: a support sleeve that interfaces with the hose, a clamping sleeve that applies securing pressure, and a fitting that provides the connection interface. This segmentation allows each component to be optimized independently and assembled without welding
2Reliability
If additional sealing means are used to ensure pressure-tight connection, then sealing reliability is improved, but the device complexity and number of components increase
Solution Approach 1:
The hose braid itself serves the dual function of structural reinforcement and sealing element. The clamping action compresses the braid against the fitting, utilizing the braid's own material properties to create the pressure-tight seal without requiring separate gaskets or sealing components
Solution Approach 2:
The braid is designed to perform multiple functions simultaneously: providing structural strength to the flexible hose, preventing deformation at the connection point, and creating the sealing interface when compressed by the clamping mechanism, thereby eliminating the need for dedicated sealing components
3Ease of operation
If the cap sleeve element is made removable for easy connection, then ease of operation is improved, but the risk of the sleeve being pulled off the hose increases
Solution Approach 1:
A stop element is pre-installed on the fitting or within the connection assembly that physically blocks the cap sleeve from being completely removed. This preliminary protective measure allows the sleeve to be easily installed and removed for maintenance while preventing accidental detachment during operation
Solution Approach 2:
The stop element acts as an intermediary component between the cap sleeve and the fitting, providing a mechanical barrier that maintains the connection integrity while still allowing intentional removal when needed. This mediator enables both ease of operation and reliable retention
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a flexible sprinkler hose (10), comprising an inner corrugated hose (12), enclosed by a braiding (14) with a terminal coupling nut (16) connected to the hose for connection to a fitting (18). According to the invention, a secure connection between the hose and the coupling nut may be achieved with a simple construction, by a terminal smoothing of the corrugated tube (12) a support sleeve (24) running between the smoothed terminal region (28) of the corrugated hose and the braiding (14), the braiding being fixed between the support sleeve, a clamping sleeve (26) enclosing the support sleeve and the smoothed terminal region is enclosed by the coupling nut (16) comprising a shoulder (44, 132, 144) running in the direction of the support sleeve. The above is provided with a stop element (42) to prevent a withdrawal of the coupling sleeve element on coupling to the fitting (18) and a flange-shaped terminal section (39) of the terminal region of the corrugated tube is fixed between the coupling nut and the fitting.