Piston Pump Valve Seat Integration
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Solution Overview
Problem
Current piston pumps require significant processing time and cost for creating valve seats that open onto the pump head surface, necessitating screw caps that are prone to fatigue and loosening due to pressure variations, complicating mounting and increasing wear on seals.
Innovation Solution
The piston pump design eliminates the need for valve seats opening onto the head surface by incorporating a single valve seat within the pump head, allowing for internal insertion of suction and delivery valves without external caps, using a blind hole configuration that reduces the pump's dimensions and eliminates the need for threaded closures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If valve seats are made to open onto the pump head surface to allow valve introduction, then valve installation becomes possible, but the pump head requires additional processing (threads, caps) that increases manufacturing complexity and cost
Solution Approach 1:
The patent merges the valve seat with the pump head by making the valve seat bottom coincide with the head's outer surface. This eliminates the need for separate caps and threaded connections, reducing manufacturing complexity while maintaining valve installation capability. The valve is introduced directly through an opening in the head without requiring additional closing components.
Solution Approach 2:
The patent extracts the cap and threaded connection elements from the traditional valve seat design. By eliminating these additional components, the design simplifies the pump head structure while still allowing proper valve installation and sealing.
2Reliability
If screw caps are used to close valve seats and hold valves in position, then valve retention is achieved, but the caps are subject to pulsating loads that cause fatigue, loosening, and seal wear
Solution Approach 1:
The patent removes the screw cap from the system entirely. By making the valve seat bottom coincide with the pump head surface, the valve is retained through its own sealing mechanism and positioning features rather than through an external cap, eliminating fatigue and loosening issues.
Solution Approach 2:
The valve retains itself in position through its interaction with the valve seat and pump head structure. The valve's own geometry and sealing features provide retention without requiring separate retaining components, making the system self-sustaining.
3Ease of operation
If multiple valve seats with external access are provided in the pump head, then each valve can be independently installed, but significant processing time and cost are required for creating seats, threads, and caps
Solution Approach 1:
The patent combines the valve seat structure with the pump head by eliminating separate caps and threaded connections. This merging reduces the number of processing steps required (no threading, no cap installation) while maintaining ease of valve installation through direct access openings.
Solution Approach 2:
The patent segments the valve installation process from the pump head structure by providing direct openings in the head for valve access. This allows valve installation without requiring the pump head to be processed with additional features like threads and caps, reducing manufacturing time.
Data Source
AI summary
A piston pump, comprising:a main body (2);a head (3), sealingly associated with the main body (2) at a coupling surface (3a);a pumping chamber (4), at least one portion of which is afforded in the head (3);a piston (5), provided with a head (5a) that is sealingly slidable in the pumping chamber (4) along a longitudinal direction (X);a valve seat (6), afforded in the head (3), which has an access opening (6a) on the coupling surface (3a) and is placed in communication with an intake manifold (S), with a delivery manifold (D) and with the pumping chamber (4);a suction valve (7) and a delivery valve (8) arranged sealingly inside the valve seat (6);wherein the suction valve (7) is movable between an opening position, in which it enables communication between the intake manifold (S) and the pumping chamber (4), and a closing position, in which it prevents communication between the intake manifold (S) and the pumping chamber (4);and wherein the delivery valve (8) is movable between an opening position, in which it enables communication between the intake manifold (D) and the pumping chamber (4), and a closing position, in which it prevents communication between the delivery manifold (D) and the pumping chamber (4).