Hydroarrow, the principle of operation of which is based on the protection of boiler heat exchangers, protects them from thermal shocks. In this case, the basis of the system is cast iron. Often, such situations arise during the initial start-up of the boiler device or during technical work, when it is necessary to disconnect the circulation pump from hot water. In addition, the use of a hydraulic separator helps to maintain the integrity of the heating system in the event that the hot water supply is turned off in automatic mode.
Hydrogun in section
Hydrogun in the context is nothing complicated. Of course, there are more complex modifications equipped with filters. Perhaps in the future an even more complex design will be invented, but so far the hydraulic gun is a unified device.
According to the principle of operation, round hydraulic separators do not differ from profile ones, which have a rectangular shape. Profile hydraulic arrow, the principle of which is to reduce the location in space and increase the capacity,has a more attractive look. From the position of hydraulics, a round arrow is more suitable.
Assignment of fixture
The hydraulic arrow, the principle of operation of which will be described in this article, is needed to equalize the pressure level in the boiler system at different flow rates in the main circuit and the sum of indicators of secondary thermal circuits. The device regulates the functioning of heating systems with multiple circuits (radiator, water heater, floor heating). Subject to proper rules in hydrodynamics, the device will ensure that there is no negative interaction of the circuits and will enable continuous operation in the set mode.
The hydraulic separator plays the role of a sump and eliminates mechanical formations (scale, corrosion) from the coolant, subject to hydromechanical standards. This feature has a very positive effect on the duration of the moving parts of the heating system.
The device removes air from the coolant, which reduces the oxidation process in metal elements.
In standard design systems, where only one circuit is assumed, shutting off a number of branches results in very little consumption in the boiler. As a result, the temperature of the cooled heat carrier rises significantly.
The water separator maintains a stable heat consumption, which compares the temperatures on the supply and return pipes.
What processes take place in the water gun
- To understand the purpose for which this device is installed in the heating system,you need to find out what processes occur with water during the period of passage through the cavity of the hydraulic gun. It is necessary to understand the basic parameters of the operation of two or more autonomous circuit heating systems.
- After carrying out all installation work, welding of joints in pipes will be carried out. The heating system is filled with cold water. As a rule, the temperature indicator is 5-15 Cº.
- When the automation turns on the main circuit pump for circulation and the burner is ignited, the secondary circuit pumps do not work, and the coolant moves only along the first circuit. Thus, the flow will rush in the downward direction.
- After the coolant reaches the desired temperature, the same selection is made by the secondary water flow circuit. With equal water flows of the main and secondary circuits, the hydraulic separator acts as an air vent. It filters out dirt and oil. Thus, the process of heating and heating hot water takes place. It should be noted that achieving an absolutely equal water flow rate in all circuits is an impossible task.
- Automatically regulates the flow in the secondary circuit when the water reaches the desired temperature and the hot water pump turns off. If the thermal heads of the radiators cover the flow due to overheating of the room on the sunny side, then the hydraulic resistance in this circuit of the heating system increases. In this case, an automated pump is connected, which reduces the productivity and water flow in the secondary circuits. Through the flow on the mainand the secondary circuit begins to move up the hydraulic arrow. If the heating system is not equipped with a hydraulic arrow, then due to significant distortion in the hydraulic system, at least the pumps responsible for circulation would stop functioning.
- When the automation of the boiler device stops the operation of the pump of the main heating circuit, the coolant flow in the hydraulic arrow rushes upward. But this situation is very rare.
How to make your own water gun
Many are interested in how to make a water gun with your own hands? For the manufacture of this device, you will need skills in the field of welding. It should be noted that the installation of a home-made system will also be expensive.
To make such a device as a hydraulic arrow with your own hands, you will need squeegees, cranes, pressure gauges, a rectangular pipe, a grinder, a hammer and a welding machine with electrodes up to 3 mm.
The holes in the collector should be burned with an electrode according to the marking. On the sleds for welding, a chamfer of 1 mm must be made. Welding is carried out in a circular manner with a leg index of 3-4 mm. Next, the collector pipes are marked. The heating scheme with a hydraulic arrow in this case assumes the presence of three circuits.
In the loop pipe on the "cold" side, two holes should be burned along the edges and three under the connecting spurs (two in one direction and one in the other). On the "hot" side, one hole in the middle and three holes are burnedunder the connecting slopes. Through holes must be located on the same axis as the outlet holes on the "hot" pipe. Two exhaust pipes will be welded into them, and the exhaust squeegee will act as the third. On the "cold" side there will be two holes for connecting the shackles and one designed for a branch pipe that passes through the hot pipe in the middle of the assembly. Gauge holes are burnt after pre-assembly.
The final step in the manufacture of such a device as a hydraulic gun, do-it-yourself testing of the system under water pressure.
It can be done by smearing the seams with soap. A pressure of at least 2 atmospheres should be applied. It can be applied in any way and at any point (for example, a drain tap fitting). The seams can be left uncoated if the pressure drop can be controlled. If it falls, then sudsing will be needed.
DIY propylene water gun
At present, the installation of such a device as a hydraulic arrow, with your own hands made of polypropylene, is quite real.
The main circuit departs from the boiler. Secondary is the decoupling system in the heating system. It is very uneconomical to accelerate the main circuit of the boiler more than it is provided by the manufacturer of the device. Hydraulic resistance increases, which increases the load on the coolant and does not provide the required flow rate.
Do-it-yourself water gun made of polypropylene withthe minimum flow rate of any coolant can create a higher flow rate due to the second artificial circuit.
If the house has a radiator heating system and hot water supply, it is recommended to divide the boiler into separate circuits made of polypropylene. This way they won't affect each other.
Do-it-yourself hydrogun made of polypropylene has great functionality. It acts as a link between two separate circuits that transport heat. In the absence of hydraulic and dynamic influence of the circuits on each other, the flow rate and speed of the coolant and the separator do not pass from circuit to circuit.
Why is the temperature of the coolant after the hydraulic separator lower than at the outlet
This phenomenon can be explained by different levels of consumption of circuits. A high temperature enters the hydraulic arrow, which is mixed with a cold coolant. The consumption rate of the latter is higher than the consumption of hot.
Why does a water gun need vertical speed
A device such as a hydraulic gun has a vertical principle of operation. There is an explanation for this.
- The main reason for low vertical speed is the presence of rust and sand in the pipes. These neoplasms settle on the separator. They need to be allowed to settle down.
- The low speed makes it possible to create a natural convection of the coolant in the hydraulic separator. Cold stream goes downand the hot one goes up. The result is the desired temperature pressure.
- Low speed makes it possible to reduce the hydraulic resistance in the hydraulic gun. It has a zero indicator, but if we discard the first two reasons, then the hydraulic separator can be used as a mixing unit. In other words, there is a reduction in the diameter of the arrow and its vertical speed increases. This makes it possible to save materials. The hydraulic arrow can be used when there is no need for a temperature gradient, but only a heating circuit is required.
- Slow speed removes small air bubbles from the coolant.
Can the hydraulic distributor be installed at an angle of 90 degrees to the horizontal
The device can be installed at this angle. You can place the hydraulic gun in any position. If it is necessary to detach mechanical waste, automatically remove the air flow or separate the circuit in accordance with the temperature indicator, the device should be installed as originally intended.
Does the volume of the arrow play a role
Of course he does. The optimal volume indicator for leveling temperature differences is 100-300 liters. The indicator of such a volume is especially relevant if the boiler operates on warm fuel.
How to choose a water gun
The arrow has two main indicators:
- power (you need to sum up the power indicators of heat and all circuits);
- total volume of pumped coolant.
It is these data that determine the performance of such a device as a hydraulic gun, the calculation of the power of which is checked against the data of the technical passport upon purchase.
How to install a water gun
As a rule, the hydraulic separator is placed in a vertical position. But the device can also be located horizontally at any angle. The direction of the end pipes must be taken into account, as this is necessary for the correct functioning of the air vent and the accumulation of sediment that must be removed from the system.
