JPH06313566A - Air separator for water hammer prevention - Google Patents

Abstract

PURPOSE:To use one component which serves as a water hammering prevention device and an air vent valve in a heating or hot water supply pipeline by eliminating a prior art structure where a water hammering prevention device and an air vent valve are separately mounted to the above pipeline respectively. CONSTITUTION:A first pipe installation hole 11 is installed to the lower end of a substantially rectangular-shaped hollow cylindrical main body 10a while a second pipe installation hole 12 is installed to a side wall. A third pipeline 3 which penetrates the upper wall from the inside of the main body 10a and projects. In a second embodiment, the first and the second pipe installation holes 11 and 12 are installed to the lower wall of the main body 10a. An air layer 16 is formed inside the main body 10a and this air layer 16 serves as a shock absorber which absorbs and relaxes the impact pressure of water hammer. Since a liquid surface of a fluid 14 is wider in the main body 10a, the air is easily separable and built up in the air layer 16 in the main body 10a. When it is necessary to air vent the air layer, an air vent valve 17 or an ON/ OFF plug is connected to the upper end of the third pipeline 13. When there is no need for air vent, the third pipeline 13 is closed with a stop plug.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water hammer preventing air separator, and more particularly to an air separator for separating air in a fluid in a pipe, which is also provided with means for preventing water hammer. Regarding air separator.

[0002]

2. Description of the Related Art When a flow in a pipe is suddenly closed by a faucet, a valve, etc., the closed upstream pressure rises abnormally, and the rising pressure becomes a pressure wave and reciprocates between that point and the water supply source. This phenomenon is called water hammer, and the pressure higher than normal pressure is called water hammer pressure. Excessive water hammer not only vibrates pipes, joints, valves, and equipment and makes impact noise, but it may also cause water leakage (edited by the Air Conditioning and Sanitary Engineering Society Harmony and Sanitary Engineering Handbook "Sho 56, 10th Edition, Volume 1, I
II-93).

As means for preventing water hammer,
There is a method of mounting an air chamber, and bellows type or airbag type water hammer preventers, and shock wave absorbing type or butterfly type water hammer preventive check valves have been developed (see III-94 to III above).
-95).

In order to reduce vapor loss in which air accumulates in the fluid flowing in the pipe and impedes the flow of the fluid, a valve for separating (extracting) the air in the pipeline was developed, and a liquid (water, As an air vent valve for hot water), there are an automatic air vent valve using a float and an air vent valve called a manual peacock (I-77 above).
2).

[0005]

In a hot water heating system, most of the air generated in the system is usually guided to an open type expansion tank, but this is not possible at the place where it becomes an air pool in the piping. Install all automatic or manual air vent valves. Since air is not evacuated from the tank in the closed expansion tank, all the air is evacuated by these air bleeding valves (ibid., Page II-300, left column).

The purpose of the expansion tank is to 1) prevent the pressure in the various parts of the device from interfering with the expansion of water due to the temperature rise in the device during operation, and 2) keep the device at a predetermined pressure during operation. , Maintain the hot water temperature, 3) prevent the expansion of expanded water and prevent the decrease of the thermal economy of the device, 4) keep the device at a certain pressure or higher even while the device is not operating, and prevent air from interfering with water leaks. To prevent invasion (ibid., Page II-300, left column).

At present, in a heating piping system and a hot water supply piping system using a water heater as a heat source, an air vent valve and a water hammer prevention device are available as market products, and they are separately used and supplied. Therefore, in the plumbing work, the water hammer prevention device and the air vent valve must be separately attached to the pipe, which causes a problem that the construction cost is high and the finished design is not good.

Therefore, an object of the present invention is to provide an air separator which simplifies the piping work, thereby reducing the construction cost, and also capable of air separation while preventing a water hammer having a good finish in terms of design. To provide.

[0009]

[Means for Solving the Problem] The above-mentioned problems are solved by the above-mentioned problems. A first pipe mounting port (11) and a second pipe are provided on a lower wall and a side wall of a hollow cylindrical main body (10a) defined by an upper wall and a lower wall, respectively. With Mouth (12)
And a third pipe (13) projecting from the inside of the main body (10a) through the upper wall of the main body (10a) is provided to provide a water hammer preventing air separator.

The above problem is further solved by providing a first pipe intake on the lower wall of the hollow cylindrical main body (10b) defined by the upper wall and the lower wall.
(11) and a second pipe inlet (12) are provided, and a third pipe (13) projecting from the inside of the main body (10b) through the upper wall of the main body is arranged. Solved by providing a vessel.

[0011]

When the embodiment described in claim 1 or 2 is used, when the water hammer is generated due to excessive pressure applied to the fluid 14, the liquid level of the fluid 14 in the main bodies 10a and 10b rises, By compressing the air layer 16, the water hammer pressure is absorbed and relieved. When the fluid 14 flows in the body 10a, air bubbles 15 mixed in the fluid 14 are separated, and an air layer 16 is formed in the body 10a.
To form. Since the liquid surface of the fluid 14 is wide in the main bodies 10a and 10b, air can be easily separated. The liquid surface of the fluid 14 descends as air accumulates in the main body 10a. When it is necessary to remove the air accumulated in the air layer 16, the air vent valve 17 or the opening / closing plug 18 is connected to the upper end of the third pipe 13 by using the embodiment described in claim 3 or 4, and the automatic or Vent manually. When the air vent valve 17 is connected, the liquid level of the fluid 14 lowers, and when the fluid in the pipe 13 escapes, the air vent valve 17 works,
The air is discharged to the outside, and when the opening / closing plug 18 is attached, the opening / closing plug 18 is opened at appropriate times to perform air bleeding. Also,
When it is not necessary to remove air, the third pipe is closed by the stopper 19 using the embodiment described in claim 5.

[0012]

Embodiments of the present invention will be specifically described below with reference to the drawings. 1 (a) and 1 (b) are front sectional views of a first embodiment and a second embodiment of the present invention, in which 10a and 10b are water separators for preventing water hammer according to the present invention. It is called a separator.), 11 is the first pipe mounting port, 12
Is a second pipe mounting port, 13 is a third pipe, and 14 is a fluid (hot water in this embodiment).

The main bodies 10a and 10b are vertically long cylindrical bodies defined by an upper wall and a lower wall. In the example of FIG. 1 (a), the first pipe mounting port is on the lower wall of the main body 10a, preferably the lower wall. It is vertically connected to almost the center of the and has a so-called one leg shape.
Is horizontally connected to the side wall of the main body 10a, preferably at a position slightly lower than the vertical center of the side wall, and the third pipe 13 projects through the upper wall from the inside of the main body 10a, preferably substantially the center thereof. .

In the example of FIG. 1 (b), the arrangement of the third pipe 13 is as shown in FIG.
As in the case of (a), the first pipe mounting port 11 and the second pipe mounting port 12 are separated from the bottom wall of the main body 10b and are connected in a substantially vertical manner, so to speak, in the shape of two legs.

In the example of FIG. 1 (a), the length L ₁ of the main body 10a in the vertical direction is about 22 cm, the outer diameter is about 8.5 cm, the length L ₃ of the third pipe 13 is about 14 cm, and the second pipe is The length L ₂ between the mounting port 12 and the top of the upper wall of the main body is about 14 cm, the outer diameter of the first piping mounting port 11 is about 3 cm, the outer diameter of the second piping mounting port 12 is about 3 cm, and the third piping The outer diameter of 13 is set to about 2.5 cm, and in the example of FIG. 1 (b), the distance d between the first pipe mounting port 11 and the second pipe mounting port 12 is about 1.5 cm.
The other dimensions were set the same as in the example of Fig. 1 (a). However, the scope of the invention is not limited to the above dimensions.

In the example of FIG. 1 (a), the fluid 14 enters the main body 10a from below the first pipe mounting port 11 to the upper side as shown by the arrow 1, and from the second pipe mounting port 12 in the horizontal direction as shown by the arrow 1. Or flow from the second pipe mounting port 12 in the horizontal direction into the main body 10a as shown by the arrow 2 and flow downward from the first pipe mounting port 11 as shown by the arrow 2.

In the example of FIG. 1 (b), whether the fluid 14 entering upward from the first pipe mounting port 11 as shown by arrow 1 flows downward from the second pipe mounting port 12 as shown by arrow 1, Or, it enters the main body 10b from the second pipe mounting port 12 upward as shown by the arrow 2, and flows downward from the first pipe mounting port 11 as shown by the arrow 2. The arrangement of the third pipe 13 is the same as in the example of FIG. 1 (a). In the first pipe mounting port 11 and the second pipe mounting port 12, the inflow / outflow direction of the fluid 14 is not selected, and the second pipe mounting port
The difference between the mounting positions in Fig. 1 (a) and (b) in Fig. 12 is that they are used properly depending on the situation of the piping site, and there is no difference in action and effect.

The operation of the example shown in FIG. 1A will be described with reference to FIG. In FIG. 2, 15 is an air bubble, 16 is an air layer, 17 is an air vent valve, for example, a commercially available automatic air vent valve, and in the illustrated example, an air vent valve 17 is attached to the third pipe 13. It is assumed that the fluid 14 enters the main body 10a from the second pipe mounting port 12 in the arrow 2 direction and flows out from the first pipe mounting port 11 in the arrow 2 direction.
When excessive pressure is applied to the fluid 14 to cause a water hammer, the liquid level of the fluid 14 in the main body 10a rises and the air layer 16 is compressed to absorb and relieve the water hammer pressure. That is, the air layer 16 is used as a cushion to prevent the water hammer pressure of the water hammer.

When the fluid 14 flows in the body 10a in the direction of the arrow 2, the air bubbles 15 mixed in the fluid 14 are separated, and move in the direction of the arrow 4 upward from the surface of the fluid 14 to cause air to flow in the body 10a. Form layer 16. The discharge of the air bubbles 15 from the surface of the fluid 14 has a wide area indicated by the symbol A in FIG. 2, so that air is easily separated. As the air accumulates in the main body 10a, the liquid level of the fluid 14 drops, and when the fluid in the pipe 13 escapes, the automatic air vent valve 17
Is activated, the air in the air layer 16 is supplied to the third pipe as indicated by arrow 5.
It passes through 13 and is discharged from the air vent valve 17 to the outside as shown by arrow 5, and the liquid level of the fluid 14 rises to the lower end of the third pipe,
The pipe 13 is filled with fluid and stops. The arrangement of FIG. 2 is shown in simplified form in FIG. 3 (a) for comparison. Note that Fig. 3 (a) and (b)
2, the same parts as those shown in FIGS. 1 and 2 are denoted by the same reference numerals, 11a indicates the first pipe, and 12a indicates the second pipe.

In the example shown in FIG. 1 (b), the generation of air in the main body 10b is the same as that shown in FIG. 2 and described above, and the state in which the air vent valve is attached to the third pipe 13 is as shown in FIG. Three
Shown in (b).

FIG. 4 (a) shows an example of manual air venting.
1 to (b), the same parts as those shown in FIGS. 1 to 3 are designated by the same reference numerals, and 18 is an opening / closing plug.

In the example of FIGS. 4 (a) and 4 (b), the third pipe 13 is normally closed by using the opening / closing plug 18. When the third pipe 13 is normally closed, the air hammer 16 absorbs and relaxes the water hammer pressure of the water hammer. When venting,
Timely (look at the time when air is trapped in the main body 10a)
Excessive air that has opened the opening / closing plug 18 is discharged to the outside.

An example of the case where the main bodies 10a and 10b are used only for the purpose of preventing water hammer and there is no need to remove air is shown in FIGS. 5 (a) and 5 (b), and shown in FIGS. The same parts as the parts are denoted by the same reference numerals, and 19 is a stopper. In the example of FIGS. 5 (a) and 5 (b), the third pipe 13 is a stopper.
Closed with 19. As described above, when it is not necessary to bleed air, the third pipe 13 is closed and the air layer
Absorbs and reduces the water hammer pressure of the water hammer by only 16.

One example of the usage state of the example of FIG. 1 (b) is shown in an example of heating piping which is a closed hot water circulation system of FIG. 6, and in FIG.
b is the main body, 17 is an air vent valve, 21 is a heat source (for example, a water heater),
22 is an expansion tank, 23 is a circulation pump, and 24 is a heating load (for example, a radiator).

FIG. 7 is an example of the usage state of FIG. 1 (a), which is shown in an example of an open type hot water supply piping. In the figure, 10a is a main body, 17 is an air vent valve, and 20 is tap water schematically shown. , 21 is a heat source, 25 is a water stopcock which is an on-off valve for water supply, 26 is a pressure reducing valve for reducing the water supply pressure to keep the boiler internal pressure below the legal pressure, and 27 keeps the boiler internal pressure below the legal pressure Therefore, a safety valve for discharging the thermally expanded water to the outside of the machine, 28 is a drain port of the thermally expanded water, 29 is a hot water supply port, and tap water 20 is supplied as shown by an arrow.

[0026]

As will be understood from the examples of FIGS. 6 and 7, the use of the air separator according to the present invention makes it possible to deal with a water hammer, and when air bleeding is required, as shown in FIG. As shown in FIG. 6 and FIG.
Since it only needs to be attached to the pipe, the construction cost is reduced, and the finished design is cleaner than before because the only parts to be attached to the pipe are the air separators. The positions of the first and second pipe mounting ports and the third pipe are not strictly limited to the positions shown in the drawing, and can be changed as needed.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention, and FIGS. 1 (a) and 1 (b) are views of a first embodiment and a second embodiment of the present invention.

FIG. 2 is a front sectional view for explaining the function of the embodiment of the present invention shown in FIG. 1 (a).

3 (a) is an example of FIG. 1 (a), and FIG. 3 (b) is FIG.
It is a front sectional view when the example of (b) is used for the purpose of preventing water hammer and separating air.

FIG. 4 is a front sectional view showing a usage state of the embodiment of the present invention,
FIG. 4 (a) is a diagram of the example of FIG. 1 (a), and FIG. 4 (b) is a diagram of the example of FIG. 1 (b).

FIG. 5 is a front sectional view showing a usage state of the embodiment of the present invention,
5 (a) is a diagram of the example of FIG. 1 (a), and FIG. 5 (b) is a diagram of the example of FIG. 1 (b).

FIG. 6 is a layout drawing of an example of heating piping showing an example of use of the example of FIG. 1 (b).

FIG. 7 is a layout view of an example of hot water supply piping showing an example of use of the example of FIG. 1 (a).

[Explanation of symbols]

 10a, 10b Main body 11 1st piping mounting port 11a 1st piping 12 2nd piping mounting port 12a 2nd piping 13 3rd piping 14 Fluid 15 Air bubbles 16 Air layer 17 Air vent valve 18 Opening / closing plug 19 Stopcock 20 Tap water 21 Heat source 22 Expansion tank 23 Circulation pump 24 Heating load 25 Water stop valve 26 Pressure reducing valve 27 Safety valve 28 Drain port 29 Hot water inlet

Claims (5)

[Claims] 1. A first pipe mounting port is provided on each of a lower wall and a side wall of a hollow cylindrical main body (10a) defined by an upper wall and a lower wall.
(11) and a second pipe inlet (12) are provided, and a third pipe (13) protruding from the inside of the main body (10a) through the upper wall of the main body is arranged to prevent water hammer air separation. vessel. 2. A first pipe intake (11) and a second pipe intake (12) are provided on a lower wall of a hollow cylindrical main body (10b) defined by an upper wall and a lower wall, and the main body ( An air separator for preventing water hammer, in which a third pipe (13) protruding from the inside of 10b) through the upper wall of the main body is arranged. 3. An air vent valve (17) at the upper end of the third pipe (13).
The water separator for preventing water hammer according to claim 1 or 2, wherein the air separator is connected. 4. The water hammer preventing air separator according to claim 1, wherein an opening / closing plug (18) is attached to an upper end of the third pipe (13). 5. The water hammer prevention air separator according to claim 1, wherein the upper end of the third pipe (13) is closed.