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Where is the difference between one-way throttle and ordinary throttle
One-way throttle valve and one-way valve synthesis, and the ordinary throttle valve is only in the throttle valve, both in the structure, function are different, the following small make up will introduce the one-way throttle valve and ordinary throttle difference where.
Structurally, there seems to be no difference between an ordinary throttle valve entering P1 and a one-way throttle valve entering P2 by applying pressure to the right end of the spool to allow the spool to move directly into P1.The difference is not the degree of hardness of the spring is different, one-way throttle is soft spring, ordinary throttle is hard spring.
Function one-way throttle valve and ordinary throttle difference
Car lift engine power unit one-way throttle valve and throttle valve difference in the role of one-way valve.Ordinary throttle valve can flow into P2 port through the triangular groove (throttle port) on the valve core when oil enters P1 port, while oil entering from P2 port can directly flow into P1 port by applying pressure on the right end face of the valve core so that the valve core moves.One-way throttle valve has the existence of one-way valve, when the oil from P2 into P1 port, due to the resistance of the throttle valve, the oil directly through the one-way valve (very few through the throttle valve) flow back to P1 port, at this time the throttle valve has no effect, this is the basic difference between the two!Can also be understood as the ordinary one-way valve two-way throttle speed regulation role, and one-way throttle only a one-way speed regulation role.
Solenoid valve, as an actuator of automatic instrument, has been used more and more in recent years.This paper analyzes the main characteristics of solenoid valve, summarizes the development trend of mature technology in China from the perspective of application, investigates the direction of simplification, intellectualization, generalization and specialization, and briefly discusses the social factors that affect the development of solenoid valve technology.
One, the main characteristics of solenoid valve
(1) external leakage is blocked, internal leakage is easy to control and safe to use.Internal and external leakage is the element that endangers safety.Other automatic valves usually extend the stem and control the rotation or movement of the valve core by electric, pneumatic or hydraulic actuators.This is to solve the long-term action of the stem seal leakage problem;The solenoid valve is the only electromagnetic force to seal the core in the magnetic sleeve, there is no dynamic seal, so the leakage is easy to plug.Electric valve torque control is not easy, easy to produce internal leakage, even broken stem head;Solenoid valve structure is easy to control internal leakage, until reduced to zero.Therefore, the use of solenoid valve is particularly safe, especially suitable for corrosive, toxic or high and low temperature medium.
(2) the system is simple, it can connect to the computer, the price is low.The solenoid valve itself is simple in structure and low in price, and is easier to install and maintain than other types of actuators such as regulator valves.What's more, the autonomous control system is much simpler and cheaper.Because solenoid valve is switch signal control, and industrial control computer connection is very convenient.In today's computer popularity, the price of a substantial decline in the era, solenoid valve advantage is more obvious.
(3) action express, small power, lightweight appearance.Solenoid valve response time can be as short as a few milliseconds, even the pilot solenoid valve can be controlled in tens of milliseconds.Because of its own loop, it is more sensitive than other automatic control valves.Properly designed solenoid valve coil power consumption is very low, is an energy-saving product;Can also be achieved only trigger action, automatic maintenance valve position, usually no power consumption.Solenoid valve shape size is small, saving space, and light and beautiful.
(4) limited adjustment accuracy and applicable medium.Solenoid valve usually only switch two states, the valve core can only be in two limit position, can not be continuously adjusted, (trying to break a lot of new ideas, but are still in the trial stage) so the adjustment accuracy is limited.Solenoid valve on the media cleanliness has a higher requirement, including granular media can not apply, such as belongs to impurities must be filtered first.In addition, viscous media can not be applied, and specific products applicable to the medium viscosity range is relatively narrow.
(5) various models and wide USES.Although the hydraulic valve manufacturer solenoid valve has a congenital shortage, the advantages are still very prominent, so it is designed into a variety of products, to meet a variety of different needs, use is very wide.The progress of solenoid valve technology is also around how to overcome the inherent shortcomings, how to better play the inherent advantages and expand.
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