JP2739490B2 - Water tank with submersible pump - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a water storage tank having a submersible pump.

(Prior Art) There are two methods for attaching a pump to a water storage tank. One is to install the pump outside the tank,
Another is a method of installing in a water tank. The former method requires that a separate pump chamber be provided outside the water tank, and thus has the disadvantage of requiring a large area,
It has the advantage that inspection and repair of the pump is easy. On the other hand, the latter method has the advantage that the installation area can be small because it is sufficient to attach the submersible pump inside the water tank, but on the other hand, when inspecting and repairing the pump, the submersible pump is placed on the roof of the water tank. The fact that the water level must be raised or drained from the water tank to lower the water level below the submersible pump, and thus it is not easy to check and repair the pump, has the opposite advantages and disadvantages to the former.

However, if the water tank needs to be installed in a limited narrow space, a pump must be installed in the water tank.

When there is sufficient space above the water tank, for example, as taught in Japanese Utility Model Application No. 59-122868 (Japanese Utility Model Application Laid-Open No. 61-38092), a cylindrical barrel body is suspended from the roof of the water tank, and The pump is inserted into the barrel body from the roof, the submersible pump is seated on the seat formed at the bottom of the barrel body, and the water that has entered the barrel body is absorbed by the submersible pump and the discharge pipe is used. The water can be sent through.
Then, at the time of inspection and repair of the submersible pump, the pump hanging wire connected to the submersible pump can be pulled up by hand, and the submersible pump can be pulled upward from inside the barrel main body and taken out on the roof of the water tank.

However, in the case of such a configuration, it is extremely difficult to normally seat the submersible pump on the seat formed at the bottom in the barrel main body. The center axis of the submersible pump tends to be not vertical but inclined, and when such careless mounting is performed, a gap is created between the submersible pump and the seating portion. Then, when such an abnormal mounting is performed and a gap is generated between the submersible pump and the seating portion, it becomes difficult for the submersible pump to supply water through the dispensing pipe at a position higher than the liquid level in the water tank. . There is a large resistance to pumping water only to the dispensing pipe installed at a position higher than the liquid level in the water tank, and there is also pipe resistance in the dispensing pipe. This is because the water flows back into the water tank from the small gap. This is due to the fact that the discharge port of the submersible pump and the discharge pipe are not directly connected and are completely separated. Moreover, such an abnormal state that the center axis of the submersible pump is not vertical but inclined and a gap is formed between the submersible pump and the seating portion cannot be sensed from outside the water tank. have.

On the other hand, if there is not enough space above the water tank or if the submersible pump is not configured to be able to move up and down, the submersible pump cannot be pulled up on the roof of the water tank. In such a case, in order to check and repair the submersible pump, it is necessary to drain all the water in the water tank or to a position where the submersible pump is installed. Usually, the submersible pump is installed at the bottom of the water tank, and when inspecting and repairing the submersible pump, all the water in the water tank is drained in consideration of workability and sanitary aspects.

As described above, when draining all or almost all the water in the water tank, it is necessary to refill the water tank after the pump has been inspected and repaired. It will cause great trouble to the people. In other words, not only during the discharge of water from the water tank and during the inspection and repair of the pump, but also after the inspection and repair is completed, the water is supplied into the water tank until a certain amount of water is secured. In the meantime, the water in the aquarium cannot be used. Further, there is a drawback that a user is liable for a water charge for discharging the water in the water tank.

Therefore, attempts have been made to take out the submersible pump from the water tank without substantially discharging the water in the water tank.

For example, Japanese Patent Application Laid-Open No. Sho 60-147595 discloses that, when a water tank is constructed by assembling panels, a room isolated outside one panel is provided integrally from the beginning, and a submersible pump is inserted into the room. It has been proposed that the room and the water tank be connected by a pipe passing outside the water tank, and a valve be attached to the pipe. According to this proposal, when the valve is closed, water does not enter the room from the water tank, so that the submersible pump can be taken out of the room without discharging the water in the water tank, and inspection and repair can be performed.

Japanese Patent Application Laid-Open No. Sho 60-217977 discloses that a submersible pump is put in a sleeve, the sleeve is put in a water tank, a discharge port of the submersible pump is exposed from one end of the sleeve, and a pipe with a valve is connected to the other end of the sleeve. The valve is located outside the water tank, and the other end of the pipe is opened inside the water tank. According to this, when the valve located outside the tank is closed, water does not enter the sleeve, so that the submersible pump can be taken out with the water still in the tank.

Japanese Utility Model Laid-Open Publication No. 61-175186 proposes the inventor of the present invention. In this publication, a pump installation room is provided in a water tank, and a submersible pump is inserted therein, and the water in the pump installation room is provided. Teaches that a valve is installed at the entrance of the water tank so that the valve can be operated from outside the water tank.

As described above, the main point has been to provide a room partitioned to accommodate a submersible pump and to provide a valve to prevent water from entering the room. But,
When attaching the valve, the following inconveniences were involved. That is, the handle of the valve is located outside the water tank, but that position cannot be present on the wall surface of the water tank in the direction in which the submersible pump is taken out, but in the opposite direction, downward or laterally. First of all, the handle of the valve is never easy to operate. Second, to facilitate handle operation, a considerable amount of space is required around the handle, which requires a large area for installation of the aquarium. Third, water leaks easily from the valve itself and from the vicinity of the valve, making this repair difficult. Fourth, the installation of the water tank complicates the installation of the water tank and is expensive. Since the provision of the valve brings such a drawback, it was necessary to improve it.

(Problems to be Solved by the Invention) The present invention has been made in order to make it possible to easily inspect and repair the submersible pump without draining water from the water tank when the submersible pump is attached to the water tank. It is a thing. At that time, in the past, a valve was provided in a partitioned room accommodating the submersible pump, but the present invention uses another simple mechanism without installing a valve. .

(Means for Solving the Problems) The present invention is the same as the invention described in JP-A-60-217977 in that a submersible pump is placed in a cylinder and the cylinder is attached to a water tank. Is different from that described in the above publication. According to the present invention, a simple plate is used instead of the valve to close the end of the tube inside the tank of the tube containing the submersible pump, and the plate is always drawn to the tube by a spring. The main point is that the plate is pushed in the cylinder axis direction by inserting the pump into the cylinder, and the plate is separated from the cylinder. In addition, the present invention provides an airtight cylindrical nest at the end of the cylinder facing the outside of the tank to expose the discharge pipe connected to the submersible pump in an airtight manner from the end of the cylindrical nest. In this case, the main point is that the submersible pump can be drawn out to some extent while maintaining a state of no water leakage by the cylindrical insert at the end of the cylinder. Thus, the present invention is based on the principle that, after the submersible pump is drawn out to some extent, the plate is brought into close contact with the end of the cylinder by the spring, so that water can be prevented from entering the cylinder.

That is, the present invention provides a hole in the vicinity of the lower end of the side wall of the water storage tank, airtightly fixes the cylinder to the hole, extends the cylinder along the bottom, puts a submersible pump into the cylinder, and fixes the inner end of the cylinder to the inside of the tank. Open up,
A closing plate is provided at the open end so as to be movable in the cylinder axis direction, the closing plate is drawn toward the cylinder end by a spring so that the cylinder end can be hermetically closed, and a cylindrical insert is hermetically attached to the outer end of the cylinder. A submersible pump, in which the discharge pipe connected to the submersible pump is airtightly exposed from the end of the cylindrical nest, and the other end of the submersible pump pushes the closing plate against the spring and separates the closing plate from the cylindrical end inside the tank, The gist is a water tank equipped with a pump.

(Embodiment) The present invention will be described below with reference to an embodiment with reference to the drawings. FIG. 1 and FIG. 2 are partially cutaway longitudinal sectional views of a water storage tank provided with a submersible pump according to the present invention.

In FIG. 1, a bottom is formed by the connection of the unit plates A, and a side wall is formed by the connection of the unit plates B, thereby forming the water storage tank X. A hole is provided near the lower end of the unit plate B located at the lower end of the side wall, and the tube 1 is air-tightly fixed to the hole, and the tube 1 extends along the bottom.

The cylinder end 11 inside the tank of the cylinder 1 is open, and the closing plate 2 is provided at the cylinder end 11. A plurality of rods 21 are fixed to the closing plate 2 upright, and the rods 21 are movably supported in the cylinder axis direction 3 of the cylinder 1 by a support 4 fixed to the bottom of the water tank. rod
A spring 23 is provided between the nut 22 at the distal end of the support 21 and the support 4, and the spring 23 urges the nut 22 away from the support 4. Thus, the closing plate 2 is constantly drawn toward the cylinder end 11 of the cylinder 1. Since the packing 24 is attached to the surface of the closing plate 2 facing the cylinder end 11, when the packing 24 of the closing plate 2 comes into contact with the cylinder end 11, the cylinder end 11 is closed airtightly.

A flange 12 is attached to the outer end of the tube of the tube 1.
Further, a cylindrical nest 5 is attached to the outer end of the cylinder of the cylinder 1,
An O-ring 51 is provided between the tube 1 and the cylindrical insert 5 to keep the space therebetween airtight. Therefore, the cylindrical nest 5
Is movable in the cylinder axis direction 3 in the cylinder 1. A flange 52 is attached to the cylindrical insert 5, and the flange 52 has an end plate.
53 is attached, and the outer end of the cylindrical nest 5 is closed.

A submersible pump 6 is housed in the cylinder 1.
A discharge pipe 61 is attached to the discharge port, and the discharge pipe 61 is fixed to the end plate 53 of the tubular nest 5 and is airtightly exposed from the end plate 53. The end plate 53 and the flange 52 are connected, and are fixed together with the flange 12 with the bolt 7. At this time, the other end 62 of the submersible pump 6 protrudes from the cylinder end 11 of the cylinder 1, so that the closing plate 2
Separated from 11.

The length of the cylindrical insert 5 in the cylinder axis direction needs to be slightly longer than the length of the other end 62 of the submersible pump 6 protruding from the cylinder end 11.

The water tank of the present invention is used in the state shown in FIG. In this state, since the closing plate 2 is separated from the tube end 11 of the tube 1, water in the water storage tank enters the tube 1 from between the closing plate 2 and the tube end 11, so that the submersible pump 6 Aspirate
It can be pushed out from the discharge pipe 61.

When it is necessary to check the submersible pump 6,
, And with the end plate 53 and the cylindrical nest 5 being integrated, the cylinder 1
Withdraw from Then, the cylindrical nest 5 is attached to the submersible pump 6.
Is pulled out of the cylinder 1 with the The cylindrical nest 5 is the cylinder 1
Even if pulled out from, because the O-ring 51 is interposed,
Water does not leak from around the cylindrical nest 5. Thus, as the submersible pump 6 moves in the cylinder 1, the closing plate 2
23 draws the cylinder end 11, and finally closes the cylinder end 11. Then, water in the water storage tank cannot enter the cylinder 1 from the cylinder end 11. Thereafter, when the tubular nest 5 is further pulled out, the submersible pump 6 is pulled out from the tube 1. At this time,
Since the cylinder end 11 is closed, only the water that has entered the cylinder 1 flows out, and the water remains in the water storage tank. In this way, the submersible pump 6 can be pulled out of the water tank while the water remains in the water tank. Therefore, the inspection of the submersible pump 6 can be easily performed.

After checking the submersible pump 6, the submersible pump 6 is advanced into the cylinder 1 and the cylindrical nest 5 is inserted into the cylinder 1, and the end plate 53, the flange 52, the flange 12 and Is fixed by the bolt 7, water can be discharged from the discharge pipe 61 as described above.

The water tank shown in FIG. 2 is also the same in principle as that of FIG. What is different is that in the water storage tank shown in FIG. 2, the cylinder is composed of two parts, an inner part 13 and an outer part 14, and the cylindrical end 11 of the inner part 13 is narrowed. It is a small tube. Another difference is that since the end of the submersible pump itself cannot protrude from the cylinder end 11, a projection 63 is attached to the end of the submersible pump, and the closing plate 2 is kept away from the cylinder end 11 by the projection 63. In this case, since the diameter of the cylinder end 11 is small, there is an advantage that the cylinder end 11 is easily airtightly closed by the closing plate 2. The water tank of the present invention may be such.

(Effect of the Invention) According to the present invention, a hole is made near the lower end of the side wall of the water storage tank, the cylinder is airtightly fixed to the hole, the cylinder is extended along the bottom, and a submersible pump is inserted into the cylinder, The inner end is opened, and a closing plate is provided at the open end so as to be movable in the axial direction of the cylinder.The closing plate is drawn to the cylinder end by a spring so that the cylinder end can be airtightly closed. The nest is attached in an airtight manner, the discharge pipe connected to the submersible pump is exposed in an airtight manner from the end of the tubular nest, and the other end of the submersible pump pushes the obstruction plate against the spring and pushes the obstruction plate to the inner cylinder. When the submersible pump is housed deep inside the cylinder, the space between the closing plate and the cylinder end is open, so that the water in the water tank easily flows into the cylinder. Therefore, the submersible pump that has absorbed the water that has flowed into the cylinder can reliably send the absorbed water to a required location via the discharge pipe. On the other hand, when removing the submersible pump from inside the cylinder for inspection and repair, first,
The submersible pump in the cylinder is slightly pulled out to the outside of the tank within the range of the sliding length of the cylindrical nest. At this time, since the cylindrical insert is airtightly attached, even if the submersible pump is slightly pulled out, no water leakage occurs. Here, since the other end of the submersible pump moves to the outside of the tank, the closing plate is drawn toward the open end of the cylinder by the spring, and the open end is airtightly closed. That is, thereafter, the water in the water tank cannot flow into the cylinder. Therefore, by further pulling out the submersible pump from the cylinder,
The submersible pump can be taken out only by discharging the water accumulated in the cylinder while the water in the water tank remains. As a result, the submersible pump can be inspected and repaired with almost no drainage of the water in the water tank. Moreover, since the above-mentioned mechanism is a much simpler mechanism than the valve, there is no failure, and thus it is economically advantageous. The present invention provides such convenience.

[Brief description of the drawings]

1 and 2 are partially cutaway longitudinal sectional views of a water storage tank provided with a submersible pump according to the present invention. In the figure, 1 is a cylinder, 2 is a closing plate, 3 is a cylinder axis direction, 4 is a support, 5 is a cylindrical insert, 6 is a submersible pump, and 7 is a bolt.

Claims (1)

(57) [Claims] 1. A hole is formed in the vicinity of the lower end of the side wall of the water storage tank, and the cylinder is hermetically fixed to the hole. The cylinder is extended along the bottom, a submersible pump is inserted into the cylinder, and the inner end of the tank is opened. Then, a closing plate is provided at the open end to enable movement in the cylinder axis direction, the closing plate is drawn to the cylinder end by a spring to allow the cylinder end to be hermetically closed, and the cylindrical nest is provided at the outer end of the cylinder to the hermetic seal. Attached, the discharge pipe connected to the submersible pump is airtightly exposed from the end of the cylindrical nest, and the other end of the submersible pump pushes the closing plate against the spring and separates the closing plate from the cylindrical end inside the tank. , Water tank with submersible pump.