DBB Forced-Seal Valve with Dovetail Tracks for Full-Port Flow
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current DBB forced sealing valves face issues with sealing reliability at the valve stem, complex operating mechanisms, and reduced flow capacity due to their geometric structure, leading to potential leaks and increased size.
Innovation Solution
The design incorporates dovetail driving tracks for the upper and lower sealing member driving parts, which are inclined relative to the valve core's rotation axis, along with a compact valve core and simplified operating mechanism, allowing for a round flow passage and reduced structural size, enabling efficient sealing and increased flow capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the valve stem completes complex rotational and linear movements through a complicated operating mechanism, then the valve can achieve forced sealing, but the sealing reliability at the valve stem deteriorates due to leakage
Solution Approach 1:
The patent extracts the complex operating mechanism from the valve stem and relocates it to the valve body. The valve stem is simplified to only perform rotational movement, while the sealing members are driven by separate driving parts within the valve body. This separation eliminates the complicated rotational and linear movements at the valve stem, improving sealing reliability.
2Reliability
If the complicated operating mechanism is arranged at the valve stem, then the valve can achieve forced sealing, but the size of the valve stem part increases to more than double the height of the valve body
Solution Approach 1:
The patent removes the operating mechanism from the valve stem and places it in the valve body. The valve stem is reduced to a simple rotational component, while all the driving and sealing mechanisms are contained within the valve body. This dramatically reduces the valve stem height to be comparable to or smaller than the valve body height.
3Reliability
If the valve core adopts a geometric shape similar to that of a plug valve, then the valve can achieve forced sealing, but the flow capacity is reduced due to reduced port designs such as rectangle or rhombus passage
Solution Approach 1:
Instead of making the valve core geometry compromise the flow passage, the patent inverts the approach by using a spherical valve core with a full-port design. The sealing function is achieved not through the core geometry but through separate sealing members driven by the upper and lower driving parts. This allows the flow passage to be a full circular port, maximizing flow capacity.
4Reliability
If the valve stem linear movement is in the same direction as the escape of medium, then the valve can achieve forced sealing, but leaking at the stem easily occurs
Solution Approach 1:
The patent extracts the linear sealing movement from the valve stem and relocates it to the valve body. The valve stem only performs rotational movement, while the sealing members are actuated by driving parts within the valve body. This eliminates the problematic configuration where medium pressure acts directly on the valve stem seal, preventing leakage.
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
This design enhances sealing reliability, simplifies the valve stem structure, and improves flow capacity by adopting a balanced and compact geometric shape, suitable for various applications and pipeline installations.
Implementation Method 1
the upper driving track and the lower driving track are dovetail, the upper driving track is inclined to the axis of rotation of the valve core and the lower driving track is inclined to the axis of rotation of the valve core
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present disclosure relates to a DBB forced sealing valve and an operating mechanism, including a valve body, a valve seat, a valve core arranged in the valve body, an upper sealing member driving part and a lower sealing member driving part arranged in the valve body and located on either side of the valve core, and the sealing members arranged between the valve seats and the upper sealing member driving part and the lower sealing member driving part. The upper sealing member driving part and the lower sealing member driving part can move along the rotation axis of the valve core, and the upper sealing member driving part and the lower sealing member driving part drive the sealing members to press against or to retract from the valve seats.