Water hammer concept

What is a water hammer pump? A type of pump that uses a portion of the water pressure to rise to a certain height by utilizing the energy generated when the flowing water is suddenly braked. The picture shows the work of water hammer pump. When the flow of water down the intake pipe to the vicinity of check valve A (deadweight load valve), the water impulse (enough impulse as long as the flow rate is large enough) causes the valve to close rapidly. Suddenly stop the flow of water flow kinetic energy is converted into pressure energy, so the pressure of the water pipe rises, the one-way valve B open, a part of the water into the air chamber and along the outlet pipe up to a certain height. Subsequently, due to the pressure in the inlet pipe is reduced, valve A automatically fall under the action of static weight, back to the open state. At the same time, compressed air in the air chamber causes valve B to close and the entire process is repeated. With a water hammer pump, about 15% of the water flowing in the inlet pipe can be pressurized up to a height equivalent to 5 times the inlet pipe drop. Water hammer pump efficiency η = ε · 嗞. Where 嗞 is the ratio of pressured water flow to the downward flow of work water; ε is the ratio of the pressure rise plus the loss of head and working water drop in the outlet pipe. Good water hammer pump efficiency up to 86%. Inlet pipe installation inclination in the range of 1: 9 to 1: 4, in order to make the best water flow braking. The water hammer pump has no moving working elements, has a simple structure, does not require an external power source, and requires no special attention. Pump design should consider the strength of pump components, to avoid the role of water hammer rupture.

Other Door Accessories

Sectional Door Accessories: motor 220V-380V, control box, spring break device, cable break device , aluminum alloy rope pulley, enhanced shaft bracket, air bag system, duplex enhanced guide wheel bracket.

Detail introduction for above main accessories

1.Motor and controller:

The garage door operator is designed for residential overhead sectional and tilt doors.

The operator memorizes the limit positions and unique braking system that slows the unit down at the end of its travel.

Rolling code remote control with max. 20 pcs hand transmitters.

The operator is equipped with a manual release lever which allows manual operation of the door in case of power failure.

The controller has a security LOCK function which prevents operation of the door from transmitter.

2.spring break device:

Sectional doors are hinged and they bend in the tracks as the door opens and closes. Many of these doors are counterbalanced with extension springs, also designated "stretch springs," and they have seven characteristics. The length is the measurement of all the coils pressed together. This, along with the inside diameter of the coils and wire size - the thickness of the wire from which the springs are made - determine the stretch, the distance the spring is extended - normally half the door height, and pull, the force the spring pulls when stretched its normal length. The type of ends determine how the ends of the spring are mounted. The initial tension is the percentage of pull needed to separate the coils. This is determined by the pitch with which the springs are wound. On sectional garage door springs this is normally 15 percent. For example a 100 pound pull spring requires 15 pounds of weight to separate the coils; when a door is open the two springs will support 15 pounds of door weight without any stretch.

Most extension springs are made of oil tempered wire. These are normally coated or painted. Some springs are made of galvanized wire.

3.able break device:

cable break device ,door hardware

adjustable bottom bracket .

the raw material hot plate

zinc plated

safety device

adjustable bottom bracket

the raw material hot plate

zinc plating

spring safety device ,2" and 3" safety device

once the cable is broken ,this devoice can keep the hurt away from the door falling

4.aluminum alloy rope pulley

Equipment: CNC stamping/punching machine, CNC bending machine, CNC cutting

machine, 5~250 tons punching machines, welding machine, polish machines...

Processed material: stainless steel: copper, carbon steel

Surface treatment: Hot galvanized, polishing

Making process:Stamping, deep drawing,bending, punching, laser cutting,threading,

welding, tapping, riveting, grinding

5.air bag system

It is a safety device. When the door is down to hit something, it will up automatically.

Operation pressure:<3mbar

Battery:CR2032*2

Battery lifetime>1 year

Emission frequency: 315MHZ

Emission power:<10mW

Receiver power source:12V

6.duplex enhanced guide wheel bracket

Determining the right type of sectional door roller for your garage door tracks can be a little confusing, especially when you do not know what you need to look for in a garage door roller. To simplify things, there are two primary things you need to be aware of. First are the actual dimensions of the roller, and second is purpose that you will be using the door for. You can read below about measuring your roller and choosing the right quality of material for your door.

Other Door Accessories,Electronic Door Accessories,Automatic Door Accessories,High Speed Door Radar Detector

Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hfrollershutterdoor.com