JPH0146390B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention installs a rod-shaped submersible pump in a water storage tank so that it is isolated from the water in the tank and can be pulled out from the tank, making maintenance and inspection of the submersible pump easy. Regarding the water tank that can be used.

The applicant for this patent is Japanese Patent Application No. 59-3624
No. 147595), 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 inside of the tank is isolated outside one of the unit plates and bulges outward. A rod-shaped submersible pump is installed in this housing part in a penetrating manner, and an on-off valve is connected in the middle of a water supply pipe exposed outside the tank that communicates the suction side of the pump with the inner bottom of the tank. When maintaining or inspecting the pump, 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. As a result, conventionally, when a submersible pump is installed immersed in a tank, the problem of having to open the drain and drain all the water in the tank during maintenance and inspection of the pump,
In addition, it was possible to solve the problem of requiring a space other than the tank when the pump room was installed outside the tank.

However, since the pump accommodating part that bulges out from the unit plate is installed at the bottom of the side wall or bottom wall of the tank, large water pressure is applied, which causes problems in isolating the pump accommodating part from the inside of the tank watertight against this water pressure. There is.

The present invention aims to solve the above problems, and includes a submersible pump with a discharge pipe protruding from one end of a rod-shaped pump body, and an opening slightly larger than the outer diameter of the pump body provided at the bottom of the side wall. a sleeve having a collar at one end, having an inner diameter slightly larger than the outer diameter of the pump body, and having a length approximately equal to the pump body, and housing the pump body therein; and the opening on the inner surface of the tank. a bolt for watertightly fixing the collar of the sleeve around the sleeve, a water supply pipe connected to the other end of the sleeve and leading into the tank, an on-off valve provided on the water supply pipe and operable from outside the tank, and the pump. Holding the discharge pipe that protrudes from the main body, penetrates the opening of the tank, and projects outward from the surroundings in a watertight manner, and holds the discharge pipe that is fixed to the outer surface of the tank by the bolt that fixes the collar of the sleeve to the side wall of the tank. The device is characterized by comprising a body and a drain pipe provided on the holding body and capable of draining water in the sleeve. As a result, the on-off valve is opened by operating it from the outside, the drain is opened to drain the water in the water supply pipe from the sleeve to the on-off valve, and the submersible pump is pulled out from inside the sleeve by removing the discharge pipe holder. Easy maintenance and inspection of submersible pumps. What is decisively different from the previous proposal is that the pump body is housed in a sleeve whose inner diameter is slightly larger than the outer diameter of the pump body, and the flange at one end of this sleeve is opened at the bottom of the tank side wall. It is watertightly fixed from the inside with bolts around an opening slightly larger than the outside diameter of the main body, and a water supply pipe with an on-off valve is connected watertightly to the other end of the sleeve. As a result, when the on-off valve of the water supply pipe is closed, the sleeve is immersed in the bottom of the tank, but is completely isolated from the inside of the tank, making it extremely easy to isolate watertight from the inside of the tank against the water pressure in the tank. can be done. Furthermore, the discharge pipe holder, which fits the pump's discharge pipe into the inner circumference and holds it watertight, is attached to the outer surface of the tank side wall using bolts that fix the collar of the sleeve to the inner surface of the tank side wall. There is no need for separate bolts to fix the collar to the inner surface of the side wall and bolts to fix the discharge pipe holder to the outer surface of the side wall, and even if the nut tightening the discharge pipe holder is removed and the holder is removed The bolt that secures the sleeve is tightened to the side wall with a separate nut, so water inside the tank will not leak outside. Furthermore, since the amount of water in the sleeve and in the water supply pipe up to the on-off valve is small, the amount of water wasted is extremely small.

The illustrated embodiment will be described below. In addition, the same reference numerals are attached to the same components in the drawings.

In Figures 1 to 8, 1 is a tank, which is constructed by connecting flanges 1' on the open faces of the upper and lower halves of a rectangular box shape with bolts and nuts, and is installed on a pedestal. It has been done. The lower half has a recess 2 at the bottom of the long side wall that is open to the side and bottom surface, and the submersible pump 3 is inserted into one end wall 2a of the recess 2.
and the short side wall 1a.

The submersible pump 3 is a well-known rod type having a water intake port 3' around the middle part of an elongated pump body 3a with one end closed, and a discharge pipe 3b screwed into the discharge port at the other end and fixed in an extended shape. . The pump main body 3a has a collar 4' at one end, and is housed in a sleeve 4 whose inner diameter is slightly larger than the outer diameter of the pump and whose length is approximately equal to the pump main body.

The tank has an opening 5 at the lower part of the short side wall 1a, which is approximately equal to the inner diameter of the sleeve, and the collar 4' of the sleeve is brought into contact around the opening 5 from the inside of the tank via a packing, so that the collar 4' and the side wall 1a are brought into contact with each other. Pass a slightly long bolt 6 through the inside of the tank and tighten it by screwing a nut 6a onto the bolt outside the tank. The other end of the sleeve passes through holes in the end walls 2a and 2b of the recess to cross the recess, and is provided with an on-off valve 7 located in the recess.
Water-tightly connect the water supply pipes 8 connected to the
If necessary, the connecting tube 9 is supported by penetrating a support plate 10 erected on the bottom wall of the tank. End wall 2a, 2
Since the center of the hole through which the water supply pipe 8 in b and the support hole of the connecting cylinder in the support plate are approximately the same height as the center of the opening 5 in the side wall 1a, this allows the sleeve 4 and the water supply pipe 8 to be connected to the tank. It is placed horizontally a little above the bottom wall.

The holding cylinder for sealing and holding the connecting cylinder 9 and the water supply pipe in the holes of the end walls 2a and 2b is arbitrary, but in this embodiment, it is as follows.

The connecting tube 9 (see FIGS. 4 and 5) has a large diameter tube section 9a that fits around the inside of the sleeve, and a small diameter tube section 9b whose inner diameter is slightly larger than that of the water supply pipe. is overhanging. Three or more ribs 12 having steps 12a are provided on the inner periphery of the large diameter cylindrical portion at equal intervals in the circumferential direction, facing radially inward, and a cushioning material 3'' is provided at the blind end of the pump body. When inserted into the inside surrounded by ribs, the blind end comes into contact with the step 12a and is held tightly concentrically with the sleeve.The small diameter cylindrical part 9b has a tapered surface on the inner periphery where the diameter increases toward the open end. 13, and a packing ring 14 having a wedge-shaped cross section is fitted to the tapered surface 13. A nut 15a having a male thread on the outer periphery is tightened to the collar 11, and the packing ring 14 is fitted to the tapered surface 13. A cap nut 15b to be pushed is screwed on.The front end of each rib 12 is provided with an inclined surface 12b, and when the pump body is inserted into the sleeve, the blind end of the pump body is guided by the inclined surface 12a. Make sure it goes inside the ribs.

Therefore, the large diameter cylindrical part 9a of the connecting cylinder is fitted to the other end of the sleeve, the support plate 10 and packing are fitted to the small diameter cylindrical part, and the nut 15a is screwed into the male thread on the outer periphery of the small diameter cylindrical part to close the support plate. Tsuba 11 through packing
and nuts 15a to fix the support plate to the bottom wall of the tank. Then, pass the end of the water supply pipe 8 into the small-diameter cylindrical portion, screw in the cap nut 15b, and push the packing ring 14 into the tapered surface 13.
Tighten the end of the water supply pipe 8 from around it to keep it watertight (see Figure 3).

The holding cylinder 16 (see FIG. 6) is a cylinder whose inner diameter is slightly larger than that of the water supply pipe 8 and has a flange 16a at one end, and a tapered surface 13 of the connecting cylinder at the other end of the inner periphery.
A nut 1 is provided with a tapered surface 16b similar to the one shown in FIG.
8a and the packing ring 17 on the tapered surface 16b.
A cap nut 18b is screwed onto the cap nut 18b.

Therefore, the retaining cylinder 16 fitted with packing is inserted into the hole in the end wall 2a or 2b through which the water supply pipe passes, and the collar 16a is brought into contact with the inner or outer surface of the tank on the end wall through the packing, and then the packing is fitted and the nut 18a is tightened. Screw in, insert tsuba 16 between the end wall and nut.
Fix the holding cylinder by tightening a through the packing. Then, pass the water supply pipe 8 through the holding cylinder, screw in the cap nut 18b, and attach the packing ring 17 to the tapered surface 1.
6b, and tighten the water supply pipe from around it with a packing ring to keep it watertight (see Figure 3).

In this way, the water supply pipe can be watertightly connected to the other end of the sleeve, and the water supply pipe can be fixed watertightly across the recess 2. In addition, the actual work involves attaching a connecting tube to the other end of the sleeve, and also attaching a support plate if necessary.
Also, attach holding cylinders to the holes in the end walls 2a and 2b of the recess, pass a water supply pipe through each holding cylinder, connect each end of the water supply pipe facing each other in the recess to the on-off valve 7 by screwing, etc., and then connect the holding cylinder to the opening/closing valve 7. The water supply pipe will be held by screwing in each cap nut of the connecting tube, but this procedure is optional and can be done as you see fit. Then, insert the blind end of the pump body into the opening 5 of the side wall 1a, push it into the sleeve, insert the blind end into the inside surrounded by the ribs 12 on the inner periphery of the large-diameter cylindrical part of the connecting cylinder, and insert the blind end into the step 12.
a. Incidentally, the rib 12 may be triangular without the step 12a as shown as 5' in the above-mentioned prior application.

After inserting the pump body into the sleeve,
Holder 1 equipped with a collar that abuts around the opening 5
9 (see FIGS. 7 and 8) is fixed to the side wall 1a, and the discharge pipe 3b protruding outward from the opening 5 is held watertight.
The pump body is made concentric with the sleeve 4 in the sleeve. The collar 19' of the holder has approximately the same thickness as the nut 6a that fixes the collar 4' at the front end of the sleeve to the side wall 1a, and has holes 20 into which the nut 6a fits, arranged in the same manner in the circumferential direction.

In this embodiment, the holder has a large diameter part 19a having approximately the same diameter as the sleeve 4, and a small diameter part 19b having an inner diameter slightly larger than that of the discharge pipe, and the collar 19' has a large diameter part 19a.
A packing cylinder 21 whose inner diameter is approximately equal to the outer diameter of the discharge pipe is fitted on the inner periphery of the small diameter part.
A cap nut 22 with a male screw is provided on the outer periphery, and a cap nut 22 for pushing the packing cylinder 21 is screwed thereon, and a flange-like stopper 23 is provided in the middle of the outer periphery of the discharge pipe 3b. Therefore, the small diameter portion 19b of the holder is fitted into the discharge pipe 3b (see FIG. 3), and the nut 6a is inserted into the hole 20.
accommodating the flange 19' to abut the outer surface of the side wall 1a,
A washer 24 having a diameter larger than the hole 20 is fitted into each bolt 6 protruding from the nut 6a, and then a nut 6b is screwed into each bolt 6, and the washer 24 and the collar 1 are fitted.
9' and the outer surface of the side wall 1a to fix the holder to the side wall. Then, the cap nut 22 is screwed in, the packing cylinder 21 is pressed against the stopper 23 of the discharge pipe, and the packing cylinder 21 is tightened around the discharge pipe 3b to hold it watertight. As a result, the pump body 3
a is a cap nut 22, a packing cylinder 21, a stopper 2
3, the blind end is pressed against the step 12a of the rib 12 of the connecting cylinder 9 or the triangular slope, and the pump can be immovably fixed in the axial direction.

In this embodiment, the distal end of the discharge pipe 3b is located in the small diameter portion 19b of the holding cylinder. For this reason, the cap nut 22 is integrally provided with a cylindrical portion 22' and connected to the external pipe 25, but the tip of the discharge pipe 3b is made to protrude outside from the cap nut 22, and the external pipe 25 is connected to the tip of the discharge pipe 3b. You can also connect directly to

In this holder, for example, there is a drain pipe 26 that can be opened by removing the plug in the large diameter portion 19a.
is provided facing downward, and the power supply line connected to the pump motor, the ground wire, and the air vent pipe are drawn out from the upward outlet 27 in a watertight manner.

To inspect the pump, close the on-off valve 7, remove the drain pipe plug, and check the inside of the sleeve 4 and the water supply pipe 3.
The water up to the on-off valve 7 inside is drained from the drain pipe 26. Next, the nut 6b is removed, the holder 19 is removed from the tank side wall 1a, and the pump 3 is pulled out from the opening 5 by pulling the discharge pipe 3b. Also, after completing the inspection, perform the operation in reverse order as above. This allows the pump to be inspected with significantly less water being wasted.

In the above embodiment, the opening/closing valve 7 is located in the recess of the tank, so that the opening/closing operation can be performed by directly touching the handle 7'. However, the present invention is not limited to this. For example, as shown in FIG. 9, the water supply pipe 8 is first pulled out from the side wall or lower wall of the tank, the on-off valve 7 is connected to this pulled out part, and the water supply pipe 8 is connected to the outside by hand. You can also open and close it by holding it in place. In addition, as shown in FIG. 10, the end 8' of the water supply pipe 8 inside the tank is opened upward, and a sphere 28 that can close the end 8' is inserted into the water using a string 28' or the like from the upper wall of the tank. This sphere 28 and the upward end of the water supply pipe constitute the on-off valve 7. When closing, operate it from a manhole on the upper wall, lengthen the string 28', and hang the upward end of the water supply pipe with the sphere. After closing and inspecting the pump, the sphere may be pulled up a little with string 28' and set aside. Furthermore, as shown in Fig. 11, an on-off valve 7 is connected to the middle or end of the water supply pipe inside the tank, and the shaft of the handle 7' 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. To support the handle shaft by penetrating the tank wall in a watertight manner, use a retaining cylinder 29 with a flange, through which the handle shaft passes, similar to the one used to support the water supply pipe 8 by penetrating the tank wall in a watertight manner, and attach bolts and nuts. Fix the seal tube to the tank wall with the cap nut, and compress the O-ring and packing with the cap nut to keep the handle shaft watertight from all around. Also, the handle shaft is cut in the middle, the part with the handle 7' 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 addition to the tanks shown in Figure 1, there are
It may be an assembly type tank in which a large number of unit plates 1a made of square or rectangular plastic or metal plates having flanges on the periphery are butted against each other and joined with bolts and nuts (Nos. 9 to 1).
(See Figure 1).

[Brief explanation of drawings]

Figures 1 to 8 show the first embodiment of the present invention. Figure 1 is a partially cutaway perspective view of the entire tank, Figure 2 is a plan view of the main parts of the same, and Figure 3 is the same as in Figure 2. 4 is a front view of the connecting tube, FIG. 5 is a vertical sectional view of the same as above, FIG. 6 is a vertical sectional view of the holding tube, FIG. 7 is a front view of the holding body, and FIG. The figure is a vertical sectional view of the same as above, FIG. 9 is a plan view taken across the tank of the second embodiment, and FIG. 10 is a side view taken vertically of the tank of the third embodiment.
FIG. 11 is a plan view of another embodiment across the tank, and in the figure, 1 is the tank, 3 is the submersible pump, and 3a
is the pump body, 3b is the discharge pipe, 4 is the sleeve, 4' is the collar, 5 is the opening of the tank, 6 is the bolt, 7 is the on-off valve, 8 is the water supply pipe, 19 is the holder,
26 indicates a drain pipe.

Claims (1)

[Claims] 1. A submersible pump with a discharge pipe protruding from one end of a rod-shaped pump body, and a tank having an opening slightly larger than the outer diameter of the pump body at the bottom of a side wall;
a sleeve having a flange at one end, an inner diameter slightly larger than the outer diameter of the pump body, a length approximately equal to the pump body, and accommodating the pump body therein; and a sleeve surrounding the opening on the inner surface of the tank. a bolt for watertightly fixing the collar of the pump; a water supply pipe connected to the other end of the sleeve and leading into the tank; an on-off valve provided in the water supply pipe and operable from outside the tank; a discharge pipe holder that watertightly holds the discharge pipe projecting outward through the opening of the tank, and is fixed to the outer surface of the tank with the bolt that fixes the collar of the sleeve to the side wall of the tank; A water storage tank characterized by comprising a drain pipe provided in the body and capable of draining water in the sleeve.