Electromagnetic pulse valve

Electromagnetic pulse valve: An electromagnetic pulse valve is a diaphragm valve that is controlled by a pilot valve driven by electromagnetism or pneumatics, and is capable of instantly opening and closing to generate pulses from a high-pressure gas source. 　　Electromagnetic pulse valve: refers to a diaphragm valve that combines an electromagnetic valve, a pilot valve, and a pulse valve, and is directly controlled by an electrical signal. 　　The function of the solenoid valve pulse is to control the oil pressure in the oil circuit. It is generally installed in the main oil circuit or the backpressure oil circuit of the shock absorber, in order to reduce the pressure shocks that occur during shifting and locking/unlocking, thus ensuring stable operation of the equipment. 　　Based on the angle between the valve’s inlet and outlet and the design of the inlet, they can be divided into three types: a) Right-angled solenoid pulse valve: The inlet and outlet of the valve are at right angles to each other, and it is a diaphragm valve that is directly controlled by an electrical signal ； 　　b) Direct-acting electromagnetic pulse valve: The inlet and outlet of the valve body are at 180 degrees apart; it is a diaphragm valve that is directly controlled by an electrical signal ； 　　c) Submerged electromagnetic pulse valve: A diaphragm valve whose air inlet is submerged in an air tank, and which is directly controlled by an electrical signal. 　　Technical requirements for electromagnetic pulse valves: 1. The operating pressure of the product is 0.1 MPa to 0.7 MPa, and the medium used is air that has been treated to remove oil and water. 　　2. At the nominal gas supply pressure of the product, when the operating voltage of the solenoid valve is 85% of its rated value, the opening response time of the electromagnetic pulse valve should be less than 0.03 seconds. 　　3. The pulse valve can be closed when the working gas pressure is 0.1 MPa. 　　4. The product should be able to withstand a gas supply pressure of 0.8 MPa. 　　5. Under specified environmental conditions, the insulation resistance of the electromagnetic coil to the housing should be greater than 1 MΩ. 　　6. Under conditions of a room temperature ranging from 5 to 35 degrees Celsius and a relative humidity not exceeding 85%, the electromagnetic coil can withstand a voltage of 50Hz, 250V applied to its enclosure for 1 minute without any breakdown occurring. 　　7. The electromagnetic pulse valve shall be able to function properly after being subjected to vibrations with a frequency of 20 Hz, an amplitude of 2 mm, and a duration of 30 minutes. 　　8. Under normal operating conditions, the cumulative service life of the diaphragm should be greater than 800,000 cycles. 　　9. The exterior of the valve shows no signs of damage such as peeled coatings, scratches, or burrs. 　　Test Method Test Environment a) The relative humidity of the ambient air shall not exceed 85% ； 　　b) No corrosive substances in the ambient air ； 　　c) The temperature of the gas source medium is 1 degree to 50 degrees. 　　Visual inspection is carried out by eye. 　　Performance testing: 1. Voltage test – Connect clean air at the nominal pressure to the inlet of the electromagnetic pulse valve, and apply an electrical signal with a voltage equal to 85% of the nominal value for a duration of 0.03 seconds to the valve, in order to check whether it opens properly. 　　2. Shut down the pneumatic test: Connect clean air at a pressure of 0.1 MPa to the air inlet of the electromagnetic pulse valve, send an electrical signal to close the valve, and check whether the electromagnetic pulse valve closes reliably. 　　3. Pressure resistance test: Clean air at a pressure of 0.8 MPa is supplied to the inlet of the electromagnetic pulse valve for 60 minutes, in order to check for any air leakage at the various sealing points on the valve. 　　4. Insulation resistance test 　　(1) Under specified environmental conditions, use a megohmmeter with a voltage of 500V, a measurement range of 0MΩ to 500MΩ, and an accuracy of grade 1, to measure the insulation resistance of the electromagnetic coil relative to its casing. 　　(2) Place the valve inside a temperature and humidity control chamber, set the temperature to 35 degrees and the relative humidity to 85%, apply a sinusoidal alternating voltage of 50Hz and 250V between the electromagnetic coil and the valve body for 1 minute, and check for any breakdown. 　　5. Vibration resistance test: The valve is mounted on a vibration testing bench and subjected to vibrations with a frequency of 20 Hz, an amplitude of 2 mm, for a duration of 30 minutes. Afterward, it is checked whether the fasteners of various parts of the valve have loosened and whether the valve is functioning properly. 　　6. Diaphragm service life test: Clean air at nominal pressure is introduced at the inlet of the electromagnetic pulse valve; a nominal voltage level with a duration of 0.1s and an interval of 3s is applied to the valve, and the number of times the valve operates continuously or in total is recorded. 　　Inspection Rules Inspection Classification: 1. Before leaving the factory, each valve must be inspected in accordance with the requirements specified in clauses 2, 3, 4, and 9 of the technical specifications. 　　2. Randomly sample 15% of the products manufactured each quarter (not less than 10 units), and conduct inspections in accordance with the provisions of clauses 5 and 8 of the technical requirements. 　　Type inspection Type inspection shall be carried out in any of the following situations: a) Products manufactured in the first batch ； 　　b) Changes in production processes and materials used ； 　　c) Valves produced in batches should be inspected once every three years ； 　　d) **The quality supervision structure specifies the requirements for type inspection. 　　Working principle of the electromagnetic pulse valve: The diaphragm divides the electromagnetic pulse valve into a front chamber and a rear chamber. When compressed air is supplied and enters the rear chamber through the throttle hole, the pressure in the rear chamber presses the diaphragm tightly against the output port of the valve, causing the electromagnetic pulse valve to be in the “closed” state. When the electrical signal to the pulse jet controller is lost, the armature of the electromagnetic pulse valve returns to its original position, the exhaust hole in the rear air chamber closes, and the increased pressure in that chamber causes the diaphragm to press tightly against the valve outlet, putting the electromagnetic pulse valve back in the \"closed\" state. Open category:

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