JPH0120318B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In order to facilitate maintenance and inspection of a rod-type submersible pump in a water storage tank, the present invention provides a system for installing a submersible pump in a tank so that it is isolated from the water in the tank and can be drawn out. This invention relates to a mounting device for a submersible pump tank.

The applicant for this patent is Japanese Patent Application No. 59-3624
), when assembling a water storage tank by connecting a number of unit plates with flanges on all four sides adjacent to each other with flanges, the pump bulges out outside of one of the unit plates, separating it from the inside of the tank. A housing part is provided, a rod-type submersible pump is installed penetratingly in this housing part, and an on-off valve is connected in the middle of the water supply pipe exposed outside the tank that communicates the suction side of the pump with the inner bottom of the tank. When performing maintenance or inspection, we proposed closing the on-off valve, opening the drain to drain the water in the pump housing, and removing the submersible pump from the pump housing. Conventionally, when a submersible pump is installed immersed in a tank, there are problems in that during maintenance and inspection of the pump, all the water in the tank must be drained by opening the drain, and the pump room must be installed outside the tank. This solved the problem of requiring space in addition to the tank.

However, since the pump accommodating part that bulges out from the unit plate is installed at the lower side wall or bottom wall of the tank, large water pressure is applied, and there is a problem in separating the pump accommodating part from the inside of the tank watertight against this water pressure. be.

The present invention is aimed at solving the above-mentioned problems, and includes a sleeve having a flange at one end, an inner diameter slightly larger than the outer diameter of the main body of a rod-shaped submersible pump, and a length almost the same as the above-mentioned pump main body. and a large-diameter cylindrical portion that fits watertightly into the other end of the sleeve, and a water supply pipe connected to an on-off valve that introduces water in the tank into the sleeve is fitted on the inner periphery to make it watertight. A connecting cylinder having a small-diameter cylindrical portion to hold the sleeve, a holder that holds the discharge pipe protruding from the pump body concentrically and watertight, and a holder that holds the discharge pipe protruding from the pump main body in a watertight manner, and the sleeve is attached to the wall of the tank. The large-diameter cylindrical part of the connecting cylinder has a rib that concentrically fits and receives the end opposite to the end having the discharge pipe of the pump body on the inner periphery of the large-diameter cylindrical part of the connecting cylinder. It is characterized in that three or more are provided radially inward and spaced apart in the circumferential direction.

This means that the submersible pump can be housed concentrically in the sleeve and placed inside the tank, isolated from the water in the tank against water pressure, or it can be fixed to the outside of the tank wall if necessary. You can also do that. Maintenance and inspection of the pump can be carried out by removing the discharge pipe holder and pulling the discharge pipe protruding from the sleeve to pull the pump out of the sleeve, and in that case, close the on-off valve connected to the water supply pipe. Therefore, the water discharged is the water between the pump body and the inner periphery of the sleeve and the water up to the on-off valve in the water supply pipe, so the amount of water wasted is extremely small.

The illustrated embodiments will be described below. In all the drawings,
The same reference numerals indicate components with the same function.

1 is the aforementioned sleeve, 2 is a connecting cylinder, and 3 is a holder, which are molded products of metal or plastic. 4 is a well-known rod-shaped submersible pump body, 4'
is the discharge pipe, and the end opposite to the end where the discharge pipe of the pump body is attached is blind;
For convenience, this end is also referred to as the blind end. 4a is the suction port around the middle part of the pump body, 5 is the water supply pipe, 6
indicates an on-off valve connected to the water supply pipe. The inner diameter of the sleeve 1 is slightly larger than the outer diameter of the pump body, the length is approximately the same as the pump body, and has a collar 1' at one end.

The connecting cylinder 2 (see Figures 3 and 4) has a large diameter cylinder part 2a that fits into the inner periphery of the sleeve, and a small diameter cylinder part 2b whose inside diameter is slightly larger than the water supply pipe. 7 is overhanging. On the inner periphery of the large-diameter cylindrical portion, three or more ribs 8... having steps 8a are provided radially inward and at equal intervals in the circumferential direction, and a cushioning material 9 is placed over the blind end of the submersible pump. When inserted into the inside surrounded by ribs, the blind end abuts against the step 8a and is held snugly and concentrically with the sleeve. Small diameter cylinder part 2
b has a tapered surface 10 on its inner periphery whose diameter increases toward the open end, a packing ring 11 with a wedge-shaped cross section is fitted into this tapered surface 10, and has a male thread on its outer periphery; A nut 12a for tightening the seal ring 11 and a cap nut 12b for pushing the packing ring 11 into the tapered surface 10 are screwed on. Incidentally, an inclined surface 8b is provided at the front end of each of the ribs 8, and when the pump is inserted into the sleeve, the blind end of the pump is guided by the inclined surface 8b and enters the inside surrounded by the rib.

Therefore, the large-diameter cylindrical portion 2a of the connecting tube is fitted to the other end of the sleeve, the support plate 13 and packing for attaching to the tank are fitted to the small-diameter cylindrical portion, and the nut 12a is attached to the male thread on the outer periphery of the small-diameter cylindrical portion. The support plate can be screwed in and fixed between the collar 7 and the nut 12a via packing. Note that the support plate 13 has a hole through which the small diameter cylindrical portion 2b passes. Also, pass the end of the water supply pipe 5 into the small diameter cylinder part and tighten the cap nut 12b.
The sealing ring 11 is pushed into the tapered surface 10 by screwing in, and the end of the water supply pipe 5 can be held watertight by tightening the sealing ring 11 from around it. Then, when the blind end of the pump body is inserted into the sleeve from the end with the collar 1' of the sleeve, the blind end will be inserted into the sloped surface of the front end of the rib 8 on the inner periphery of the large diameter cylindrical part of the connecting cylinder. 8b, enters the inside surrounded by ribs 8, and is received by step 8a. In this state, the discharge pipe 4' projects outward from the end of the sleeve having the collar 1'.

Incidentally, the rib 8 may be triangular without the step 8a as shown as 5' in the above-mentioned prior application.
When installing the pump in a tank, secure the sleeve to the side wall of the tank before inserting the pump body as described above.

To do this, an opening 15 is formed in the lower part of the side wall 14 of the tank through which the pump main body having the same diameter as the sleeve can pass, and the collar 1' of the sleeve is brought into contact with the opening on the inner surface of the tank through packing, and the collar 1', Pass the longer bolts 17 through the aligned holes around the packing opening from the collar 1' side, tighten them with nuts 17a, and then insert the pump as described above.
If the pump is to be installed outside the tank, a support plate 16 which has a similar opening 15 and is attached to the side wall or bottom wall of the tank with bolts, nuts, etc., has a sleeve 1' around one side of the opening. bolt 17,
It is fixed with nuts 17a, but in this case, the support plate and collar 1' can be fixed before or after inserting the pump body into the sleeve, and the support plate can be attached to the side wall or bottom wall of the tank using the sleeve collar. It may be done after fixation or before fixation.

In this embodiment, the holder 3 has a large diameter part 3a having approximately the same diameter as the sleeve 1, and a small diameter part 3b having an inner diameter slightly larger than that of the discharge pipe, and a collar 3' is attached to the end of the large diameter part 3a. A packing cylinder 18 whose inner diameter is approximately equal to the outer diameter of the discharge pipe is fitted onto the inner periphery of the small diameter portion, and a cap nut 19 having a male thread and into which the packing cylinder is pushed is screwed onto the outer periphery. There is a collar-shaped stopper 20 in the middle of the outer circumference of the discharge pipe 4' to receive the packing cylinder.
is provided. The thickness of the collar 3' is approximately equal to the thickness of the nut 17a fixed to the tank side wall or support plate of the sleeve collar 1'. A hole 21 is provided for the insertion.

Therefore, the small diameter part 3b of the holder is fitted into the discharge pipe 4', the nut 17a is accommodated in the hole 21, the collar 3' is brought into contact with the outer surface of the side wall of the tank and the other surface of the support plate, and the nut 17a is protruded. A washer 22 with a diameter larger than the hole 21 is fitted onto each bolt 17, and then the bolt 1
Screw the nuts 17b into the washers 22.
The holder is fixed to the tank or the support plate by tightening the flange 3' to the outer surface of the side wall or the other surface of the support plate, and then the cap nut 19 is screwed in to press the packing cylinder 18 against the stopper 20 of the discharge pipe. Tighten the discharge pipe 4' from around it to keep it watertight.
As a result, the pump body is pushed by the cap nut 19, the packing cylinder 18, and the stopper 20, and the blind end is pressed against the step 8a of the rib 8 of the connecting cylinder 2 or the triangular slope, making the pump immobile in the axial direction, and the sleeve can be fixed concentrically.

In this embodiment, the tip of the discharge tube 4' is located in the small diameter section 3b of the holder. For this reason, the cap nut 19 is integrally provided with a cylindrical portion 19' and connected to the external pipe 23, but the tip of the discharge pipe 4' is made to protrude outside from the cap nut 19, and the external pipe 23 is connected to the discharge pipe 4'. It may be connected directly to the tip of the

In addition, this holder is provided with a drain pipe 24 facing downward, which can be opened by removing the plug, for example, on the large diameter part 3a, and also has a watertight connection for the outside air pipe, the power supply line connected to the pump motor, the ground wire, etc. An upward drawer opening 25 is provided for pulling out.

By using the mounting device of the present invention, the rod-shaped submersible pump can be installed in various ways both inside and outside the tank.

FIG. 7 is an example thereof, and FIG. 2 is a sectional view of the main part of the same. In this case, the collar 1' of the sleeve is fixed around the opening 15 at the bottom of the tank side wall with bolts and nuts 17, 17a, and the support plate 13 attached to the connecting tube 2 is fixed to the bottom wall of the tank with bolts and nuts. It is fixed. The water supply pipe 5 traverses a recess 26 provided on the side wall of the tank and open to the front and bottom surfaces, and the on-off valve 6 connected to the water supply pipe 5 is located within the recess. In this case, it is necessary to seal the water supply pipe and the wall of the recess through which it penetrates, and this can be done as appropriate. The other end of the circumference is provided with a tapered surface 27b similar to the tapered surface 10 of the connecting cylinder 2, and a packing ring 28 with a wedge-shaped cross section is provided here.
This is done by a holding cylinder 27 which is screwed with a nut 29a which is fitted into a male screw on the outer periphery and tightened against the collar 27a, and a cap nut 29b which pushes the packing ring 28 into the tapered surface 27b.

Therefore, the flange 27a of the holding cylinder 27 fitted with packing is passed through the hole in the wall of the recess through which the water supply pipe passes.
abut against the inner or outer surface of the tank on the wall through the packing, then fit the packing and tighten the nut 29a.
Screw in and tighten the wall between the flange and the nut to fix the holding cylinder. Then, the water supply pipe 5 is passed through the holding tube, the cap nut 29b is screwed in, the seal ring 28 is pushed into the tapered surface 27b, and the water supply pipe is tightened with the seal ring from around the circumference to hold it watertight (see Fig. 8).

To inspect the pump, close the on-off valve 6, remove the drain pipe plug, and check the inside of the sleeve 1 and the water supply pipe 5.
The water up to the on-off valve 6 inside is drained from the drain pipe 24. Next, the nut 17b is removed, the holder 3 is removed from the tank side wall 14, and the pump body is pulled out from the opening 15 by pulling the discharge pipe 4'. Also, after completing the inspection, perform the operation in reverse order to the above. This allows the pump to be inspected with a very small amount of water being turned off.

In the above embodiment, the opening/closing valve 6 is located in the recess of the tank, so that the opening/closing operation can be performed by directly touching the handle 6'. However, the present invention is not limited thereto, and for example, as shown in FIG.
It is also possible to pull the opening/closing valve 6 out using a holder, connect the opening/closing valve 6 to the pulled out part, and open/close the opening/closing operation by touching it with your hand. Also, as shown in FIG. 11, the end 5' of the water supply pipe 5 inside the tank is opened upward,
A sphere 30 capable of closing the end 5' is suspended from the upper wall of the tank by a string 30' or the like, and the sphere 30 and the upward end of the water supply pipe form an on-off valve 6. The string 30' can be lengthened by operating from a manhole, etc., and the upward end of the water supply pipe can be closed with a sphere, and when the inspection of the pump is completed, the sphere can be pulled up a little with the string 30' and placed.

Furthermore, as shown in Fig. 12, an on-off valve 6 is connected to the middle or end of the water supply pipe inside the tank, and the shaft of the handle 6' is passed through the side wall or bottom wall of the tank in a watertight manner, so that it can be connected to the outside of the tank. It may be opened and closed by operating the handle. In order to support the shaft of the handle by penetrating the tank wall in a watertight manner, use a retaining tube 31 with a flange through which the handle shaft passes, similar to the one used to support the water supply pipe 5 by penetrating the tank wall in a watertight manner, and tighten the nut 31a.
At the same time, the holding cylinder is fixed to the tank wall, and the O-ring and packing are compressed with the cap nut 31b to hold the handle shaft watertight from the surroundings. Also, the handle shaft is cut in the middle, the part with the handle 6' is held through the tank wall as described above, and the part attached to the valve is connected together with a connecting tube so that they rotate together. Good too.

In all of the above installation examples, the collar 1' of the sleeve was fixed from the inside around the opening in the side wall of the tank, and the support plate 13 fixed to the connecting cylinder was fixed to the bottom wall of the tank. A support plate 16 fixed to the collar 1' of the sleeve and a support plate 1 fixed to the connecting tube.
3 can also be attached to the lower outer surface of the tank side wall or the lower surface of the bottom wall with bolts and nuts, respectively. In this case, the water supply pipe 5 extending from the connecting cylinder is sealed and penetrated to the side wall or bottom wall of the tank using the elbow and the aforementioned holding cylinder 27.

In this case as well, after closing the on-off valve 6 and opening the drain pipe of the holding body to drain water, the holding body can be removed and maintenance and inspection of the pump can be easily performed in the same way.

The tank may be integrally molded as shown in Fig. 7, or it may be made of a number of unit plates 1a made of square or rectangular plastic or metal plates with flanges on the periphery, butted against each other by bolts or nuts. It may also be a joined prefabricated tank (see Figures 9-12).

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of the mounting device of the present invention;
The figure is a plan view of an example of a state in which a submersible pump is installed in a tank, Figure 3 is a front view of a connecting tube, Figure 4 is a vertical side view of the same as above, Figure 5 is a front view of a holder, and Figure 6 7 is a longitudinal side view of the same as above, FIG. 7 is a partially sectional perspective view of the tank showing the installed state of FIG. 2, and FIG.
The figure is a partial enlarged sectional view of the main part of FIG. 2, FIG. 9 is a longitudinal sectional view of the holding cylinder, and FIGS. 10 to 13 are explanatory views showing other examples of the installation state of the submersible pump. 1
1 is a sleeve, 1' is a flange thereof, 2 is a connecting tube, 2a is a large diameter tube portion, 2b is a small diameter tube portion, 3 is a holder,
3' is its collar, 4 is the submersible pump body, 4' is its discharge pipe, 5 is the water supply pipe, 6 is the on-off valve, 13 is the support plate,
Reference numeral 14 indicates a side wall of the tank, and reference numeral 16 indicates a support plate.

Claims (1)

[Claims] 1. A sleeve with a flange at one end, an inner diameter slightly larger than the outer diameter of the main body of the rod-shaped submersible pump, and a length substantially the same as the pump main body, and a sleeve with a flange at the other end of the sleeve, which is watertightly attached to the other end of the sleeve. A connection having a small-diameter cylindrical portion that fits into the inner periphery of a water supply pipe connected to an on-off valve that introduces water in the tank into the sleeve, and holds the water-tight watertight concentrically. A holder comprising a cylinder, a flange that can be fixed facing the flange of the sleeve, and concentrically and watertightly holds the discharge pipe protruding from the pump body; and a support device that supports the sleeve on the wall of the tank. The end opposite to the end with the discharge pipe of the pump body is fitted concentrically to the inner periphery of the large diameter cylindrical part of the connecting cylinder, and three receiving ribs are spaced apart in the circumferential direction. A device for attaching a submersible pump to a water storage tank, characterized in that the submersible pump is provided radially inward.