Electromagnetic hydraulic closed gate valve / electromagnetic hydraulic slow closing gate valve type: HS-HZ141H-16
I. use
The valve is used in industrial pipeline pumping stations at all levels and high-rise building pressurized water supply system, for opening and closing equipment use, using the valve, can cancel pump group permanent check valve, electric valve, water hammer eliminator; has a valve three, energy saving, resource saving, simplified the control system functions.
Two, performance and characteristics
The valve relies on the medium pressure in its own pipe as the power source. Under the combined use of PLC electric control equipment, automatic control, remote control, centralized control and pump valve integrated control can be realized. Therefore, the operation procedure is simplified, and the valve in the pump motor is suddenly cut off, can automatically slow down after shut down, due to the completion of valve closing soon after the first slow process is divided into two stages, so it can effectively prevent and eliminate harmful water hammer on the pipe network equipment damage.
Due to the cancellation of the check valve, water hammer eliminator and other equipment, greatly reducing the head loss, such as the use of a DN400 slow closing valve, when the medium flow pipe is 2m/s, the annual saving 18 thousand degrees, the price is greater than the purchase value of the valve, so the valve is the advanced equipment energy saving, resource saving, safety in addition.
Three 、 operation method and working principle
1, open the pump opening valve
The pump motor is energized after about 5 seconds, an electromagnetic reversing valve is energized, the main pipe driven by P medium hole connecting pipe into the solenoid valve through the O2 hole into the hydraulic cylinder chamber, push the piston moves upward, the stem also drives the gate to the opening, in the opening process, the hydraulic cylinder. The medium cavity from hole O1 of the electromagnetic reversing valve is discharged from the A hole.
2 、 stop the valve and stop the pump
The electromagnetic directional valve is powered off, and the driving medium is made up of the P hole of the electromagnetic reversing valve through the O1 hole, and then enters the upper cavity of the hydraulic cylinder through the connecting pipe, and pushes the piston to move downward, and the valve stem drives the flashboard to be closed downward. During the closing process, the medium in the lower chamber of the hydraulic cylinder is discharged through the B hole by the O2 hole of the electromagnetic reversing valve. When the gate is closed to the nominal diameter of 80%, closure of piston in the hydraulic cylinder into the closure state, the closing speed of the gate by the fast slow, slow closing valve is formed at this time, the slow closing conditions can prevent and eliminate the effect of harmful water hammer overpressure in pipe network. The 19 needle speed regulating valve is a trimming device with slow closing time, and the clockwise rotation of the needle shaped speed regulating valve can prolong the closing time of the valve, on the contrary, the time of slow closing can be shortened. In the slow closing conditions before the end of the position limiting device of the indication rod push a stroke switch on the cylinder head, the pump motor power, the valve is not completely closed, is still in a slow closing process, so the pump required after a certain period of time reversal, the closing process was completed.
3 、 running debugging
Besides the function of pushing off the switch of the trip switch, the utility model also has the function of preventing the gate and the valve of the valve from being too tight when the valve is closed, and the utility model has the two difficult opening 12 times. Valve in use, if the phenomenon of lax closure, you can loosen the fastening nut, the limit set up to the appropriate, so that the valve closed tight, and then lock the nut.
Four, the main technical parameters
Body part
Model
HS-HZ141T-10
HS-HZ141H-16
HS-HZ141H-25
Nominal pressure (Mpa)
One
One point six
Two point five
Test pressure
Sealing (Mpa)
One point one
One point seven six
Two point seven five
Strength (Mpa)
One point five
Two point four
Three point seven five
Applicable medium
Water, steam, oil
Medium temperature (DEG C)