Bulk Material Gate Valve Sealing Plates for Hygienic Shut-Off
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Solution Overview
Problem
Existing gate valves for bulk material conveyance suffer from unreliable sealing, leading to potential uncontrolled release of materials, and are difficult to clean and maintain, particularly in industries requiring high hygiene standards.
Innovation Solution
A gate valve design featuring concentrically arranged feed and discharge openings with sealing plates made from durable, non-metallic materials like PTFE or elastomeric plastics, which provide a robust and reliable seal, and a wedge-shaped slide blade for easy removal and cleaning, along with a displacement drive system allowing for clean-in-place operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If compressible ring seals are used to seal the valve blade, then the sealing structure is simple, but the sealing reliability is poor leading to uncontrolled discharge of bulk material
Solution Approach 1:
The patent uses a flexible sealing plate made of elastomeric plastic material that can deform to conform to the valve blade surface, creating a reliable seal. The sealing plate's flexibility allows it to adapt to surface irregularities while maintaining continuous contact, eliminating the point-compression issues of ring seals.
Solution Approach 2:
The sealing plate is made from composite or specific elastomeric plastic materials that combine elasticity, durability, and sealing properties. These materials provide both the necessary flexibility for sealing and the structural integrity to withstand operational conditions without degrading.
2Device complexity
If the gate valve is designed with traditional sealing elements, then the structure is simpler, but it becomes difficult to clean and maintain particularly in hygienic industries
Solution Approach 1:
The sealing plate is designed as a separate, detachable component that can be easily removed from the valve body without disassembling the entire valve. This segmentation allows for quick replacement and cleaning of the sealing element, significantly improving maintenance ease while keeping the overall valve structure relatively simple.
Solution Approach 2:
The sealing plate is designed as a replaceable component that can be easily swapped out when worn or contaminated. This approach prioritizes ease of maintenance over permanent durability, allowing quick replacement rather than complex repair procedures.
3Ease of manufacture
If traditional annular seals are used, then the manufacturing is simpler, but the sealing effect is unreliable for surface sealing of the slide blade
Solution Approach 1:
The sealing plate functions as a flexible film that can conform to the valve blade surface, providing reliable sealing contact. This flexible film approach creates a larger sealing surface area compared to annular seals, ensuring consistent sealing performance while remaining manufacturable.
Solution Approach 2:
The sealing plate's material properties (elastomeric plastic with specific Shore hardness) are optimized to provide the right balance of flexibility and structural integrity. The material parameters are selected to ensure reliable sealing while maintaining ease of manufacture and replacement.
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
Ensures reliable sealing and easy maintenance, preventing material leaks and facilitating thorough cleaning without disassembly, making it suitable for hygienic industries like food, pharmaceuticals, and plastics.
Implementation Method 1
The sealing plates enable surface pressure against the slide blade. The sealing plates enable surface sealing of the slide blade.
Data Source
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AI summary
A gate valve for a conveying line in a plant for the production and/or processing of bulk materials comprises a housing (4) having a longitudinal axis (5) with a feed opening (7) for feeding bulk material into the housing (4) and with a discharge opening (10) for discharging bulk material from the housing (4), a gate leaf (28) which is displaceable along the longitudinal axis (5) between a flow position in which the feed opening (7) is connected to the discharge opening (10) for bulk material flow along a flow direction (11) and a shut-off position in which the feed opening (7) is separated from the discharge opening (10) by the gate leaf (28), a sealing plate (34, 35) each for sealing the gate leaf (28) against the feed opening (7) and against the discharge opening (10), and a housing cover (20) which is detachably attached to the housing (4) for closing a housing opening (21). is.