A Solenoid Valve is an electromechanically operated valve. The valve is controlled by an electric current through a solenoid: in the case of a two-port valve the flow is switched on or off; in the case of a three-port valve, the outflow is switched between the two outlet ports. Multiple solenoid valves can be placed together on a manifold.
Solenoid valves are the most frequently used control elements in fluidics. Their tasks are to shut off, release, dose, distribute or mix fluids. They are found in many application areas. Solenoids offer fast and safe switching, high reliability, long service life, good medium compatibility of the materials used, low control power and compact design.
Besides the plunger-type actuator which is used most frequently, pivoted-armature actuators and rocker actuators are also used.
Solenoid valve designs have many variations and challenges.
Common components of a solenoid valve:
The core or plunger is the magnetic component that moves when the solenoid is energized. The core is coaxial with the solenoid. The core's movement will make or break the seals that control the movement of the fluid. When the coil is not energized, springs will hold the core in its normal position.
The plugnut is also coaxial.
The core tube contains and guides the core. It also retains the plugnut and may seal the fluid. To optimize the movement of the core, the core tube needs to be nonmagnetic. If the core tube were magnetic, then it would offer a shunt path for the field lines. In some designs, the core tube is an enclosed metal shell produced by deep drawing. Such a design simplifies the sealing problems because the fluid cannot escape from the enclosure, but the design also increases the magnetic path resistance because the magnetic path must traverse the thickness of the core tube twice: once near the plugnut and once near the core. In some other designs, the core tube is not closed but rather an open tube that slips over one end of the plugnut. To retain the plugnut, the tube might be crimped to the plugnut. An O-ring seal between the tube and the plugnut will prevent the fluid from escaping.
The solenoid coil consists of many turns of copper wire that surround the core tube and induce the movement of the core. The coil is often encapsulated in epoxy. The coil also has an iron frame that provides a low magnetic path resistance.
Solenoid Valve Electromagnetic Valve, Pneumatic Component, Pneumatic Solenoid Valve, Air Compressor Valve,Solenoid Valve Timer NINGBO BRANDO HARDWARE CO.,LTD , http://www.brandopneumatic.com
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More than 20 consecutive gas bomb bursts on trucks have been checked and escaped
More than 20 gas tanks on the trucks have been linked to the deflagration driver has been checked to escape the diesel generator | Diesel Generator Price / 2012-03-06
More than 20 gas bottle serial bombs on trucks
The debris flew 40 meters away. Not only did the truck blow up into a pile of scrap iron, but the nearby breakfast shop was also damaged.
The accident was related to the illegal filling of gas. The car was just investigated last month and the driver is now fleeing.
The accident occurred at about 5:50 yesterday morning near Zhenhai Xiongzhen Road.
Horror burst! More than 20 gas tanks on the pickup truck exploded and burst into pieces one by one, and the entire car was blown out of sight.
very lucky! Just a few meters away is a breakfast shop, and the owner and the second waited a few seconds after smelling the strange smell. The explosion happened.
on site
Gas leak in the event of a fire explosion detonated cylinder debris flying 40 meters away
After the incident, our reporter arrived at the scene the first time. At the entrance of Shitangxia Village, Zhenhai, a breakfast shop.
The small trucks that had been burning for more than an hour after the explosion had already changed beyond recognition. The nearby ground was full of debris.
The sister-in-law of the breakfast shop Chen recalls that at about 5:45 yesterday morning, a pickup truck arrived at the door of the breakfast shop. “The back door of the container box was open to my kitchen. I suddenly felt an air flow blowing out of the container box when I passed by. It smelled very pungent.â€
At the kitchen entrance, coal stoves were being fired, and the spouted airstream met an open flame and quickly put the minivan "lighted."
Sister Chen panicked and quickly shouted for a small worker in the store to "run." "We just ran more than 20 meters away from our head and heard a burst of explosion from behind. It was really dangerous..."
The explosion and burning not only made the wagon completely different, but also destroyed Chen’s breakfast restaurant. There were gas tank fragments and broken iron sheets on the car, near the ground, the doors and windows of the breakfast shop were scorched, and the roof was also flying debris. Take out three or four holes...
Fragments flying out of the explosion even "attacked" a nearby row of temporary resettlement houses. The windows and gates of the resettlement house were hit by multiple pieces and shot through.
One witness said that this explosion, the fragments that were blown away, even far more than 40 meters.
After the incident, the investigation by the fire department confirmed that the pickup truck was carrying a simple and illegal inflator. It looked like a tank modified from a drum, and there were more than 20 gas tanks. In the violent explosion, more than a dozen gas tanks were completely blown into pieces.
At present, it is initially determined that the accident was caused by a gas leak on a small truck and was ignited by an external open flame, resulting in an explosion.
lucky
A gas tank will be able to smash down the three-story building. This time it was lucky that there were no casualties.
Fortunately, such a violent explosion did not result in casualties.
Sister Chen said: "Fortunately, we smelled at first, and we ran faster. At that time, it was still 5 o'clock in the morning and there were no pedestrians on the street."
“This did not cause any casualties. It was a miracle.†The relevant personnel of the Zhenhai Fire Department analyzed that, in the early hours of the incident, there were few people, and people in the breakfast shop also ran out of gas after smelling the gas smell; the second was with this vehicle. The parking space for pickup trucks is relatively open.
A firefighter said that if more than 20 gas cylinders were exploded inside the house, the consequences would be unimaginable.
A firefighter who worked in the fire department for many years explained that the explosion of the gas tank would cause two damages in an instant. Once the liquid petroleum gas expands to a gas state instantaneously, creating a shock wave, like a mine explosion. In addition, when LPG is mixed with air when it becomes gaseous, when the concentration in the air drops to 3% to 11%, in the event of an open flame, a chemical explosion will occur, and the entire gas space will explode and burn, creating a huge shock wave. Two disasters. A 50-kilogram cylinder, if completely detonated, can destroy all three-storey buildings. Last August, in Tianyang Village, Longshan Township, Cixi, a gas tank exploded at a resident's home and it destroyed a two-story building.
Questioning
The pickup truck was an illegal filling point and checked two illegal filling points on the same day.
After the pickup truck exploded, the car driver quickly ran.
Afterwards, Zhenhai Suichuan police station quickly found the owner of this small truck. He was named Zhang and was from Fuyang, Anhui. He was living in the Jingchuan street in Zhenhai. However, Mr. Car advocated nothing about the illegal gas filling of his car.
So where did the gas from this pickup truck come from? Yesterday, at an on-site interview, many villagers living in Shitangxia Village stated that they were unaware of it. They only often saw such a car in and out of the village.
After the explosion of the gas bottle, the Zhenchuan Squadron also sent people to the scene.
Despite the fact that the minivan was blown away and the license plate was not there, the urban management team still recognized the car.
A deputy squadron leader of Zhangchuan Squadron of Zhenhai City Management said that last month, the illegally transported gas tanker had been investigated by them. There were a large number of gas bottles and simple filling equipment in the car. The car is doing illegally filling the gas business. At that time, the city management detained the gas bottle and tank filling equipment on the car and penalized it. Unexpectedly, it soon began to do illegal activities, but also an accident.
Yesterday morning, law enforcement officers from urban management launched a net search in Shitangxia Village. They seized two illegal gas filling points and seized a total of 132 gas cylinders, most of which were scrapped.
It is understood that the relevant departments in Ningbo have been checking tight the illegal gas filling, but they are "preventive." An insider who had been illegally transporting gas canisters said that the profits are too large and it is very difficult for them to close their hands.
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