Separator Piston Oil Tank Safety Valve for Pressure Shock Relief
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Solution Overview
Problem
Existing electro-hydraulic riveting tools experience reduced service life and potential damage to air bags due to significant instantaneous pressure changes, leading to frequent maintenance.
Innovation Solution
A piston-type oil tank with a separator piston and safety valve system that includes an oil inlet, air outlet, and a safety valve core to manage pressure changes, limiting the movement range of the separator piston and discharging excess oil pressure through an air outlet, while using a return spring and sealing ring for reset and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an air bag is used to maintain pressure balance and separate atmosphere from oil, then cavitation is prevented, but the air bag is damaged by instantaneous pressure changes reducing service life
Solution Approach 1:
A separator piston is introduced as an intermediary component between the oil and atmosphere, replacing the vulnerable air bag. The piston maintains pressure balance while being resistant to damage from pressure changes, thus preventing cavitation without sacrificing service life.
Solution Approach 2:
The vulnerable air bag is extracted from the system and replaced with a more durable separator piston that performs the same pressure balancing function without suffering from the same durability issues.
2Duration of action of stationary object
If a separator piston replaces the air bag to withstand pressure changes, then service life is extended, but pressure balance control becomes more complex
Solution Approach 1:
The separator piston is designed to move dynamically within the tank in response to pressure changes, automatically maintaining pressure balance without requiring complex control systems. The piston's movement is constrained by a safety valve core that limits its travel range.
Solution Approach 2:
The separator piston system is self-regulating, automatically responding to pressure changes by moving the piston to the appropriate position, thereby maintaining pressure balance without external intervention or complex control mechanisms.
3Adaptability or versatility
If the separator piston movement range is unlimited, then pressure balance is flexible, but excessive oil pressure cannot be discharged
Solution Approach 1:
A safety valve core is pre-installed within the separator piston to limit its movement range. This preliminary constraint prevents the piston from moving too far, which could allow excessive oil pressure to build up, while still allowing sufficient movement for pressure balance.
Solution Approach 2:
The safety valve core provides mechanical feedback by physically constraining the separator piston's movement. When the piston reaches a certain position, the safety valve core prevents further movement, thereby preventing excessive pressure buildup while maintaining pressure balance flexibility within safe limits.
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
The system extends the service life of the oil tank by withstanding greater pressure impacts, reducing maintenance frequency, and maintaining pressure balance through controlled oil and air flow, enhancing safety and efficiency.
Implementation Method 1
an air bag connected to the atmosphere is provided inside the oil tank to maintain pressure balance between the oil and the atmosphere
Implementation Method 2
a return spring sleeving the safety valve core is provided between the support frame and the separator piston
Data Source
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AI summary
The present invention discloses a piston-type oil tank with safety valve and a riveting tool, relating to the technical field of riveting tools. In the first aspect, a piston-type oil tank with safety valve comprises a tank body, with a separator piston arranged inside the tank body, and also an oil inlet and an air outlet provided at the front and rear ends of the separator piston respectively. The separator piston is arranged with a penetrated safety valve core, a support frame is arranged at the end of the safety valve core facing the air outlet, and a stop plate is provided at the end of the safety valve core facing the oil inlet, with the length of the safety valve core greater than that of the separator piston; an oil discharge groove is provided on the side wall of the safety valve core, and when the support frame presses against the end face where the air outlet is located, the oil discharge groove connects the spaces on both sides of the separator piston, and an oil outlet gap is reserved between the support frame and the end face where the air outlet is located. In the second aspect, a riveting tool comprises the aforementioned piston-type oil tank with safety valve and also a pump body, wherein the tank body is connected to the pump body. The present invention features a longer service life and higher safety.