Segmented Casing Spacer with Joint Restraint for Pipe Stability
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Solution Overview
Problem
Existing pipe coupling arrangements within outer casings face challenges in maintaining secure, sealed connections between pipe sections, particularly under axial pressure and vibration, leading to higher rates of joint failure and leakage, due to inadequate support and difficulty in installation and repair.
Innovation Solution
The use of segmented bands with risers and couplings that securely engage pipe sections within an outer casing, providing fixed positioning and spaced relation, along with a joint restraint mechanism to maintain a sealed connection, allowing for easy assembly and reduced maintenance costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional pipe junction holders are used to connect carrier pipes within an outer casing, then the pipes can be secured against disengagement, but the installation becomes difficult and time-consuming, and the support at pipe junctions is insufficient leading to joint failure and leakage
Solution Approach 1:
The casing spacer is divided into multiple segments that can be assembled separately and then joined together. Each segment can be independently positioned and secured to the outer casing, allowing for easier installation without requiring complex disassembly of the entire spacer structure. This segmentation enables workers to install the spacer in manageable sections while maintaining strong joint support.
Solution Approach 2:
The invention transitions from traditional point-supported pipe junction holders to a distributed multi-point support system provided by the segmented casing spacer. By engaging the outer casing at multiple locations simultaneously, the spacer creates a three-dimensional support network that stabilizes pipe connections from multiple directions, preventing the joint failure and leakage problems associated with single-point support.
2Reliability
If pipe junction holders are used to secure pipe connections, then disengagement is prevented, but repair and maintenance become difficult requiring removal of both pipe sections and the junction holder
Solution Approach 1:
The segmented design of the casing spacer allows individual segments to be accessed and modified independently. If a pipe connection requires repair, workers can access the affected area without needing to remove the entire spacer structure or both pipe sections. The modular segments can be selectively adjusted or removed to facilitate maintenance while maintaining overall connection security.
Solution Approach 2:
The casing spacer acts as an intermediary structure between the pipe connections and the outer casing. It provides stable support for pipe joints while being itself accessible for maintenance. The spacer's segmented construction allows it to serve as a mediator that can be adjusted or repaired without requiring removal of the protected pipe sections, thereby improving repair accessibility while maintaining connection security.
3Stability of the object's composition
If adequate support is provided at pipe junction holders, then joint stability improves, but the device complexity and installation difficulty increase
Solution Approach 1:
By dividing the casing spacer into multiple segments, the invention achieves distributed multi-point support for enhanced joint stability without creating a single complex monolithic structure. Each segment is relatively simple in design, but their collective arrangement provides comprehensive support at multiple locations, stabilizing pipe connections effectively while keeping individual component complexity low.
Solution Approach 2:
The segmented casing spacer structure serves multiple functions simultaneously: it provides stable support for pipe connections, maintains spacing between pipes and the outer casing, facilitates installation through modular assembly, and enables easier repair access. This multi-functionality achieves high joint stability without proportionally increasing device complexity, as the same segmented structure accomplishes multiple objectives.
Data Source
AI summary
An integrated casing spacer and joint restraint unit is attached to each of a pair of pipe sections adjacent to an end-to-end connection of the pipe sections by means of first and second spacer/retainer ring members. Disposed on the outer periphery of each ring member in a spaced manner are plural risers each having a respective runner disposed on its outer end for engaging an inner surface of an outer casing and maintaining fixed spacing between the inner pipe sections and the outer casing. Plural paired risers, with one riser disposed on each ring member, are aligned with one another along the axis of the connected pipe sections and are each adapted for secure connection to a respective connecting rod for securely coupling the two ring members together and restraining relative movement between the two pipe sections.