When the water pump is pumped from the water tank, if the self-irrigation water-absorbing method is adopted, the water-absorbing pipe can be filled with water all the time. When the water pump is started, the time for irrigation and exhausting can be saved, and the pump can be put into operation quickly, which improves the automation and reliability of the pump start-up. degree.
The commonly used self-irrigation method is to make the elevation of the water pump axis lower than the working water level of the pool. This method is often used in buildings with a basement. When it is deployed, the pump room is located in the basement, and the pool is located next to the basement pump room or outdoors. In this method of water absorption, the working water level of the pool is higher than the elevation of the water pump axis, so that the water suction pipe is always filled with water, and the water pump can be automatically and quickly started.
For buildings without a basement, it is difficult to use the self-irrigation method described above. Because of this type of construction, the pump room is generally located on the ground floor. If a pool is installed next to the pump room on the ground floor, especially a large-scale fire tank, it will occupy a large amount of ground floor use area, and construction units will generally not agree.
In this case, the pool is generally set outside the building and buried under the ground. As a result, the working water level of the pool is lower than the elevation of the water pump axis, and the water pump cannot achieve self-irrigation. In this case, the following methods can be used to solve this problem.
The first method is to install a suction bottom valve at the end of the suction pipe of the pump. The suction bottom valve is actually a kind of check valve, which ensures that the water flow can only enter the suction pipe and not backflow. Therefore, if the suction pipe is filled with water, although the water pump axis elevation is higher than the working water level of the pool, it is due to the absorption of water. The role of the valve, the water inside the suction pipe will not flow into the pool, so that the suction pipe is always filled with water to ensure that the pump can automatically start quickly. The reliability of this water-absorbing method is affected by the quality of the water-absorbing bottom valve. For example, if the valve is not closed tightly and water leaks, the water in the suction pipe will slowly flow into the pool. After a long time, there will be no water in the suction pipe, causing the pump to start. Artificial irrigation is required.
Punching production is mainly used for metal sheet . Through the mold, can be blanking, punching, forming, drawing, dressing, fine punching, shaping, riveting and extrusion parts, and so on, widely used in various fields.
1.Steel welded body, tempering treatment, high rigidity, accuracy and stability;
2.The crankshaft undergoes grinding treatment after high frequency quenching;
3.Pneumatic dual balance cylinder, which balances the slide block and punch weight to reduce noise and impact;
4. Combined pneumatic clutch and brake are made of friction material, which means long service life;
5. PLC electric control system is safe and reliable;
6. Machine is with both hands button and foot switch to achieve continuous, single and inching practices.
Main Features:
1. The punching machine is suitable for forming, blanking, punching, bending and other cold stamping process.
2. The Casting fuselage,maximum rigidity and minimum deflection for accurate parts and long tool life. body can be tilted, high rigidity and less deformation Compact. Thick plates and large columns provide you with the stable platform .
3. The Machine use Rigid rotated bond clutch rigid and well supported. The clutch gives continuous strokes for mass production.
4. Crank shaft is made of special alloy steel machined to close accuracy and fitted in bronze bushes for smooth working, longer life & accuracy.
5. Properly sized flywheel, is made of high grade cast iron, for storing and releasing adequate energy for the pressing operations, and properly balanced for smooth running.
6. Gear are of steel cast or fabricated. Gear teeth are generated by precision hobbing machine.
7. Machine is with both hands button and foot switch control: anti-tie down, non-repeat controls with ring guards.
8. Protective fence and the safety interlock to ensure the operation safety. Have a movable single-hand pedal switch,easy to operate.
Our factory is the professional and leading manufacturer.
we can produce, design, installation and debug various roll forming machines and metal cold processing equipments.
Main products include metal roof panel, glazed roof tile, CZ steel purlin, floor decking, roof ridge cap, sandwich panel, metal keel, roller shutter panel, door frame, metal fence, and sheet uncoiler, bending, slitting, cutting, flattening, punching, crimping.
Backed by reasonable design, precision machining and selected material, both our standard and customized machines are characterized by long life span, precise forming and easy operation. With our customers` trust, our machines have been sent to America, Australia, Russia, India, Sri Lanka, Nigeria, Pakistan, Uzbekistan, Mozambique, Angola, Turkey, Brazil, etc.
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