JP3415696B2 - Automatic air bleeding system in submersible pump casing - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic air bleeding system in a casing for a submersible pump incorporated in a water tank.

[0002]

2. Description of the Related Art In supplying tap water to high-rise buildings,
Usually, a water tank in which FRP panels are assembled is used, and a system is adopted in which water is introduced from a water main to store water in the water tank, and the water is boosted by an underwater pump provided in the water tank to supply water.

In the conventional arrangement of the submersible pump, the casing is fixed by penetrating the side plate of the water tank, and the submersible pump is installed in the casing. And repair of submersible pump
At the time of inspection, the water in the casing and the water in the water tank should be separated and
It is said that the water inside the sing is drained and then the submersible pump is pulled out of the tank. In addition, when the submersible pump after repair and inspection is put into the casing, the air inside the casing must be completely exhausted. The method of completely removing the air of the was adopted.

[0004]

In the prior art, all the air bleeding in the casing is done by manually opening and closing the cock, which is troublesome and requires an improvement in operation due to operational errors. It was being done. On the other hand, some automatic casing air bleeding systems are also found, but they are not complete.In the case of dust clogging, etc., the existence of air cannot be confirmed during operation, and if it continues to operate, the pump will malfunction. There was also a risk of leading to.

The present invention has developed a safe and simple automatic air bleeding system which avoids the spread of the failure to other parts due to the failure of the air bleeding system itself.

[0006]

The present invention has been made to achieve the above object, and the gist of the present invention is a water supply apparatus having an underwater pump installed in a water tank. A casing for housing the submersible pump was provided on the side plate, a pipe was taken out from the front side of the casing to the outside of the side plate, the pipe was returned to the water tank again with an upward slope, and the pipe was equipped with an opening / closing valve A. The present invention relates to an automatic air bleeding system in a casing for a submersible pump. An automatic air bleeding system in the casing is preferably provided with a release valve B opened to the outside of the water tank between the opening / closing valve of the pipe and the casing.

[0007]

According to the present invention, the portion corresponding to the uppermost portion of the casing and at least the side plate of the water tank located above the casing are connected by a pipe, and the opening / closing valve A is provided therebetween. . For this reason, when the air inside the casing is evacuated during use of this submersible pump, if the valve A is opened, the pipe is graded, and the casing is caused by the difference in height. The air inside will automatically escape into the aquarium. Therefore, even if there is a sudden phenomenon in which air enters the casing during operation of the submersible pump, it is possible to automatically and quickly bleed air by always opening the valve A. Is.

When the submersible pump is taken out of the casing, the release valve A may be closed and the drain cock may be opened. Preferably, the open valve B communicating with the outside air is opened to open the inside of the casing. The water can be easily discharged and the pump can be easily taken out. The two on-off valves provided in this system system may be three-way valves, and these three-way valves function as the two valves A and B described above.

[0009]

Embodiments of the present invention will now be described in more detail with reference to the drawings. First, an outline of a conventional submersible pump mounting portion will be described with reference to FIGS. 1 and 2. FIG. 1 is a half-cut vertical sectional view thereof, and FIG. 2 is a front view thereof. In the figure, 1 ₁ is a side plate of the tank consisting of the FRP panel, the side plate 1 ₁ of the flange 2 ₁ outside, 2 ₂ short tube 2 having a bolt with a flange 2 ₁ while (omitted, hereinafter Fixed) and side plate 1 ₁ at the same time
The casing 3 is fastened together inside (inside the water tank). And the flange 2 ₂ of the short pipe 2, which also are those flanges 4 _1, 4 ₂ discharge pipe 4 provided with is bolted with the flange 4 _1, wherein the bristles on the discharge pipe 4 - Thing 3 The submersible pump 5 that is housed inside is connected. The submersible pump 5 is usually provided with a blade portion 5 _{1 on the} front side, a motor portion 5 ₂ on the rear side, and a water suction port 5 ₃ in the center. Then, usually Ke - Thing third rear end small diameter 3 ₁
The opening / closing valve 6 is provided here. The opening and closing valve 6 protrudes to the outside from the lower bottom plate 1 ₂ constituting a water tank, the valve 6 from the water tank by turning Ke - introduction of water into single 3 is to be controlled.

[0010] Now, the discharge tube 4 is submerged pump 5 is connected, the front side is a flange 4 ₂ of the small diameter, pipe or the like is to be connected (not shown) thereto. The flange 4 ₁ is provided with an air bleeding cock 7 and a drain cock 8 at the top and bottom. The air bleeding cock 7 is provided at the uppermost portion of the casing 3 described above.
The drain cock 8 will be provided at the lowest position.

When the submersible pump 5 is pulled out from the casing 3, the valve 6 is first closed to shut off the water in the water tank from the water in the casing 3, and then the drain cock 8 is opened (air). It is good to open the extraction cock 7).
The water in the thing 3 is discharged, the bolt between the flange 4 ₁ and the flange 2 ₂ is then unscrewed, and the submersible pump 5 is pulled out together with the discharge pipe 4.

On the other hand, when the submersible pump 5 is installed in the casing 3, the flange 4 ₁ and the flange 2 _{2 of the} short pipe 2 are installed.
And bolts, then open the valve 6 with the air vent cock 7 open, introduce the water in the water tank into the casing 3 to expel the air in the casing 3, and this air vent cock Closing 7 completes all work.

As described above, in the conventional structure, all the work is manually operated. Especially, after the submersible pump 5 is set in the casing 3 and the submersible pump 5 is started to operate, The extraction cock 7 is never opened. Therefore, when the air remains in the casing 3 or when the air enters the casing 3 due to a decrease in the water level in the water tank, there is no means for detecting this, and therefore the air is not detected. The work of pulling out the water was not carried out, which would lead to the failure of the submersible pump 5.

The present invention has developed a system in which the air entering the casing 3 is always surely escaped to the outside of the casing 3 during operation of the submersible pump 5. FIG. FIG. 4 is a front view showing an outline, FIG. 4 is a partially cut plan view, and FIG. 5 is a partially enlarged view thereof. In each figure, the same symbols as in the previous figure have the same definition.

[0015] Now, in the present invention an air vent cock 7 in previous figures, the portions i.e. Ke - forming a perforation in the side plate 1 ₂ for a position above the top of the single 3, U during which
The character-shaped pipe 10 is arranged. That is, the pipe 10 is inclined with the uppermost position of the casing 3 as the lower side, and the opening / closing valve A is provided in the middle thereof.
In particular, in this example, an on-off valve B that opens to the outside air is also provided.

In the pipe 10, the submersible pump 5
The open / close valve A is always open when the is operated, so that the air that has entered the casing 3 returns to the water tank through the pipe 10. There is substantially no air in the single 3 while the submersible pump 5 is operating. Of course, open / close valve A
Has a function of closing the submersible pump 5 when it is taken out from the casing 3 and shutting off the water between the water in the water tank and the pipe 10.

Although FIG. 5 is an enlarged view of the pipe 10, the opening / closing valve A and the flange 4 _{2 of the} discharge pipe 4 are preferably used.
It is preferable to provide removable unions 11 and 12 between the pipe and the pipe. When the discharge pipe 4 is pulled out or attached, the pipe 10 can be divided and removed from this portion, which is convenient for workability. It is something that has been trained. The number of unions may be one in some cases. still,
Although not shown, the open / close valves A and B may be three-way valves as described above.

FIG. 6 is a view similar to FIG. 5 showing another embodiment. In this example, the opening / closing valve A is provided on the side plate 1 ₁ side, and between the opening / closing valve A and the flange 4 ₂ . This is an example in which the pipe 10 is arranged in the above, and the same effect will be obtained.

[0019]

According to the present invention, when the on-off valve A is opened when bleeding air from the casing while the submersible pump is in use, the pipe is graded. Due to the difference in height, the air in the casing automatically escapes into the water tank, and its utility value is extremely high.

[Brief description of drawings]

FIG. 1 is a semi-cut vertical sectional view of a conventional automatic air bleeding system in a casing for a submersible pump.

FIG. 2 is a front view of the flange in FIG.

FIG. 3 is a front view showing an outline of an automatic air bleeding system in a casing for a submersible pump according to the present invention.

FIG. 4 is a partially cutaway plan view of the automatic air bleeding system in FIG.

5 is a partially enlarged view of a main part in FIG.

FIG. 6 is a partially enlarged view similar to FIG. 5 showing another embodiment.

[Explanation of symbols]

1 ₁ ... side plate of water tank, 1 ₂ ... bottom plate of water tank, 2 ... short pipe, 2 ₁ , 2 ₂ ... flange for short pipe, 3 ... casing, 3 ₁ ... casing the rear end, 4 ‥‥ discharge pipe, 4 _1, 4 ₂ ‥‥ flange provided in the discharge pipe, 5 ‥‥ submersible pump, the vane portion of the 5 ₁ ‥‥ water pump, 5 ₂ ‥‥ submersible pump motor - motor -Part, 5 ₃ ... water suction port of submersible pump, 6 ... on-off valve provided at the rear end of the casing, 7 ... air bleeding cock, 8 ... drain cock, 10 ... pipe, 11, 12 ... Union, A, B ... open / close valve.

Continuation of the front page (56) Reference JP-A-4-314998 (JP, A) JP-A-60-217977 (JP, A) Actually opened 61-175186 (JP, U) Actually opened 62-173590 (JP , U) Japanese Patent Publication 6-89755 (JP, B2) (58) Fields investigated (Int.Cl. ⁷ , DB name) F04D 13/00-13/16 B65D 88/00-99/00 E03B 11/12 F04B 51/00

Claims (2)

(57) [Claims] 1. A water supply apparatus in which an underwater pump is installed in a water tank, wherein a casing for accommodating the submersible pump is provided on a side plate of the water tank, and a pipe is taken out from the front side of the casing to the outside of the side plate to face upward. An automatic air bleeding system in a casing for a submersible pump, characterized in that the pipe is returned to the water tank with a gradient and an opening / closing valve A is provided in the pipe. 2. The automatic air bleeding system in the casing for a submersible pump according to claim 1, further comprising a release valve B opened between the opening and closing valve of the pipe and the casing.