JPS60594B2 - Piping corrosion protection device - Google Patents

Description

[Detailed Description of the Invention] (Background of the Invention) Currently, air conditioning equipment, hot water supply systems, etc. are indispensable in hospitals, hotels, condominiums, etc., and these basic circuits are used to heat water in a boiler and pump it to each location. It is sent to a radiator in the room, and after being used there, it is returned to the boiler.

However, the so-called airlock phenomenon in the piping that circulates hot water and the generation of sound waves transmitted to the hot water are causing problems with the smooth flow of hot water and noise.

In addition, the reality is that red rust has formed inside the pipes, causing problems with water supply. One of the causes is dissolved gases (oxygen, nitrogen, carbon dioxide, hydrogen, methane gas, etc.) contained in hot water.

Therefore, the inventor of this application has developed a bubble separator (Special Publication No. 57-16
No. 285) was proposed. (Prior Art) However, although this bubble separation device has shown a revolutionary effect in waist cooling devices, complete separation of dissolved gases has not yet been achieved in water heaters.

The reason for this is that in the case of heating installations, the same hot water is circulating through the circulation channel, so it constantly passes through a bubble separator built into this channel, and each time it passes through, the gas is separated. It is thought that removal will occur and that the dissolved gas will eventually disappear. However, when installing a hot water supply, new water must be supplied in accordance with the amount used, and since this new water contains a large amount of dissolved gas, separation of this dissolved gas is always insufficient. Further, the supply and wound installation is not used all the time, and is hardly used at night, for example.

Therefore, if the hot water circulation pump is stopped when the hot water is inconvenient, the temperature difference in the hot water in the pipes causes the concentration of oxygen in the pipes to vary, which accelerates corrosion of the pipes due to oxygen concentration battery action. In addition, conventional pumps (impeller type) are used in the supply and wound line.
It has also been revealed that when vibration is applied within a certain range (8 mm to 18 mm), a hard anti-coin protective coating is formed on the inner wall of the pipe, and this is effective in preventing corrosion of the pipe.

Analysis of this coating reveals silicic acid, aluminum oxide, ferric oxide, zinc oxide, and very small amounts of calcium oxide and magnesium oxide. (Characteristics) Therefore, the first feature of the present invention is that hot water is constantly allowed to flow through the piping, and the capacity (capacity) of the circulation pump for this purpose is necessary and sufficient to make the hot water flow. The capacity used is approximately one-third to one-fourth of the maximum instantaneous amount of hot water used by the facility.

This relatively low-capacity pump constantly passes the hot water through the bubble separator, but the wave motion of this pump is unable to provide waves of sufficient amplitude to form a hard anti-mirror protective coating on the piping. be. Therefore, the second feature of the present invention is to install an amplitude device downstream of the low-capacity pump, add amplitude to the insufficient wave motion of the pump, give the fluid an appropriate amplitude value, and apply a hard anti-rust protective coating to the inner wall of the pipe. The purpose is to prevent corrosion of pipes and the generation of red water.

(Structure of the present invention) Therefore, the structure of the present invention is that a check valve is provided on a pipe that is suitable for the water supply pipe of the bubble separator, and a pump and an oscillator are provided in a bypass provided around this valve. It has the following characteristics.

(Embodiment) An embodiment of the present invention will be described based on the drawings. As shown in FIG. 1, a supply tank T is provided with a supply pipe la, and this pipe is It is connected to the water supply port of the bubble separation and removal device 3.

Note that illustrations of boilers and the like are omitted. and pipe l
A is provided with a bypass lb centered around the chuck valve 2, and this bypass includes a pump 4 and an amplifier 5.
is provided.

A pipe lc is connected to the outlet of the bubble separation and removal device 3, and a shower 6 and a faucet 7 are provided on this pipe. V, . . . are valves, respectively. By the way, the concrete structure of the bubble separator 3 is as shown in FIG. 2. Front and rear plates 9 and 10 are welded to both ends of a cylindrical iron pipe body 8, and A water supply port 11 is provided at the top, and a discharge port 12 is provided below the center of the rear plate.

Pipes la and lc are connected to the water supply port 11 and the discharge row 2, respectively.

The inner diameter of the pipe body 3 and the length in the direction of the sea bream are determined by the amount of water flowing in from the pipe, the flow velocity, the turbulence state, etc.

Next, a vertical pipe 13 is protruded from a part of the upper surface of the pipe body 3 on the downstream side near the rear plate in a vertical position.

An exhaust pipe 14 penetrates the top plate of the vertical pipe 13, and its lower end is fixed in a state that it penetrates into the vertical pipe. Therefore, between the outer circumference of the lower end of the exhaust pipe and the inner wall surface of the vertical pipe, there is a cushion part 15 in which air remains.
is formed. An automatic venting device 16 is provided at the upper end of the exhaust pipe 14. If the diameter of the pipe body is, for example, 100 (same below), the length in the axial direction is 550, the height of the vertical pipe is 120, and the diameter is 100.
．． The diameter of the exhaust pipe is 20 mm, and the diameter of the water supply and discharge ports is 50 mm.

Next, as shown in the third and fourth figures, the concrete configuration of the amplifier 5 is as follows: a horizontal pipe 17 made of iron is provided with a vertical pipe 18 in a vertical position, and two movable iron plates 19, 19a are attached to the lower end of this vertical pipe. An iron piece 20 having a coil 21 is attached to the vertical pipe via an electrical insulator, and a coil 21 is attached to the upper end of the iron piece.
is winding. By passing alternating current electricity through this coil 21, magnetic flux is generated between the movable iron plate and the horizontal pipe, and the electromagnetic action of the eddy current gives vibration to the fluid passing between them, generating an electromotive voltage. It is. It is preferable to form the outer surfaces of the movable iron plates 19, 19a in an arc shape because this will increase and equalize the generation of eddy currents. Next, the operation of the present invention will be explained.

First, a case will be described in which hot water is used in the wound supply device.

The hot water in the tank T flows under pressure from the pipe la, passes through the bypass lb, the pump 4, and the amplitude generator 5, where waves are propagated, given a predetermined amplitude, and passed through the bubble separation and removal device 3. Then, a circulation passage is formed which passes through the pipe lc and returns to the tank T.

In addition, since the flow of hot water by the pump 4 is prevented from flowing backwards by the check valve 2, it is always supplied to the bubble separator 3.Next, when a large amount of hot water is to be used again, Since the check valve 2 is opened by the pressure from the tank T in accordance with the amount of hot water used due to insufficient supply of hot water, a sufficient amount of hot water can be supplied according to the amount of hot water used.

Even in this case, the wave amplitude values of the pump and the amplifier are propagated. By the way, the operating state of the bubble separation and removal device 3 will be explained.

The turbulent flow of hot water supplied into the pipe 8 from the water supply port 11 to this device 3 is rectified, and dissolved gas is separated at this time. Therefore, initially the pipe body 8 and the vertical pipe body 1 were
3 is filled with hot water, but the separated gas stays in this vertical pipe, and this serves as a cushion part 15 to promote rectification of the following hot water. However, when the amount of gas that fills the cushion portion 15 increases below the lower end of the exhaust pipe 14, the excess gas passes through this exhaust pipe and is exhausted to the outside from the automatic venting device 16. By the way, when a predetermined amplitude is applied to the supplied hot water by the pump and the amplitude generator 5, the bubble separation and removal device collects heavy metal substances such as silicic acid, calcium oxide, magnesium oxide, and iron, which are corrosion products in the fluid. will be held.

Therefore, hollow bamboo shoot-shaped protrusions of magnetic iron (Fe204) are formed on the upstream inner wall surface of the iron pipe body 8, and then silica, calcium oxide, and magnesium oxide are attached to the outer periphery of this iron. Magnetic iron is attached to the outer periphery again, and this action is repeated. At the same time, iron ions (Fe+2) fly out from the iron surface of the inner surface of the protrusion, and these adhere to the inner wall surfaces of the pipes la, tortoise b, and lc placed afterwards, forming a hard anti-rust protective coating. It is. Particularly if the pipe is made of copper, an oxidized steel coating is formed. In this way, the coating prevents corrosion of the inner wall surface of the pipe, and as a result, the generation of red water is prevented. When this protrusion grows three arcs inside the pipe body, its upper end opening closes and a new protrusion grows on the adjacent downstream side.
Therefore, the inner wall surface of the pipe body 8 needs to be cleaned once every two to three years to remove these protrusions. (Effects of the present invention) As described above, according to the present invention, it is possible to prevent the airlock phenomenon in the pipes of water supply systems and hot water supply equipment, to make the flow of water supply smooth, to collect corrosion products in the pipe body, and to prevent the inner wall surface of the pipes. It forms a hard anti-rust protective coating on pipes, which is extremely effective in preventing corrosion of pipes and preventing red water from forming.

[Brief explanation of drawings]

Figure 1 is a wiring diagram, Figure 2 is a sectional view of the bubble separator, and Figure 3 is a cross-sectional view of the bubble separator.
The figure is a front view of the vibrator, and FIG. 4 is a sectional view taken along line N-W in FIG. 3. 1a'...Pipe, lb...Bypass, 2...Check valve, 3...Bubble separator, 4...Pump, 5
...... Amplifier, 8... Pipe body, 9... Rule plate, 10... Rear plate, 11... Water supply port, 1
2...Discharge port, 13...Vertical pipe, 14...
Discharge pipe, 15... cushion part. Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. An iron pipe body having a water supply port above the center of the front plate and a discharge port below the center of the rear plate, and a vertical pipe protruding in communication with a part of the upper part of the pipe body near the rear. , having a bubble separator comprising a discharge pipe that penetrates the top plate of the vertical pipe and is fixed thereto to form a cushion section between it and the inner surface of the vertical pipe, and a check valve is provided on the pipe communicating with the water supply port; This pipe is equipped with a bypass around the check valve, and this bypass is equipped with a low-capacity pump and an oscillator.