JP2020012438A - Detachable device of submerged pump - Google Patents

Abstract

To provide a detachable device of a submerged pump 1 that can prevent water from being leaked from an interval between the submerged pump 1 and a detachable stand 4 due to reaction force of pump discharge pressure, and is easy to attach/detach.SOLUTION: A locking tool 12 having a hook-shaped expanding part symmetric at an obliquely upward part of a detachable flange 5 disposed on the discharge side of a submerged pump 1 is provided, a locking ring 13 having a wedge-shaped contact seat 18 on the suction side of a detachable stand 4 is provided, and the locking tool 12 is formed continuously in the left-right and up-down directions so as to be parallel to the locking ring 13. Therefore, the lower part of the submerged pump 1 opens by the reaction force of the discharge pressure of the submerged pump 1, and thus leaked water can be prevented from being leaked from an interval between the detachable flange 5 and the locking ring 13.SELECTED DRAWING: Figure 1

Description

The present invention relates to a submersible pump having a detachable structure, in which two latches are provided on the upper and lower sides of a flange in the left and right directions, and the fulcrums of the latches are arranged so as to be continuously formed in the vertical direction. The present invention relates to a submersible pump attachment / detachment device capable of improving the watertightness of a pump and a pumping pipe.

Conventionally, when installing a submersible pump in a culvert of an underground drainage pumping station, the submersible pump is guided by a guide rail erected from the opening for entry to the basement, and connected to a pumping pipe installed underground. Is done. At this time, a submersible pump attachment / detachment device that connects a stopper provided at one position above the flange of the submersible pump and the flange of the water pump pipe is generally known.

Further, when the submersible pump is driven, as a structure for preventing water leakage from occurring between the annular portion of the guide member located between the submersible pump and the elbow pipe and the flange of the elbow pipe, a plate body portion of the guide member is provided. Patent Literature 1 discloses a submersible pump attaching / detaching device provided with protrusions for locking to a support bar below right and left sides.

Furthermore, in order to maintain the liquid tightness of the flange surface of the submersible pump and the pumping device, the fulcrum at the connection between the submersible pump and the pumping device is located near the center line of the load on the flange surface due to the submersible pump discharge pressure. Patent Document 2 discloses a submersible pump attaching / detaching device.

Japanese Patent No. 4081085 Japanese Utility Model Publication No. 57-136900

Since the conventional submersible pump attachment / detachment device has a configuration in which only the stopper at the upper part of the flange of the submersible pump is hooked on the flange of the pumping pipe, the supporting point of the submersible pump with respect to the pumping pipe must be one point. Therefore, there is a problem that the watertightness is low because the submersible pump rotates about the locking tool by the reaction force of the discharge pressure.

The submersible pump attachment / detachment device of Patent Literature 1 supports the submersible pump at a plurality of positions compared to the conventional technology in which the locks are provided at two positions obliquely above the flange, and only one position is provided. As a result, the watertightness of the flange surfaces of the submersible pump and the pumping pipe increases. However, since the abutting portion of the locking tool is formed horizontally and the distance from the center of the flange to the locking tool is the same as that of the related art, the moment acting on the locking tool is also the same. For this reason, the submersible pump is easily rotated around the contact portion as a fulcrum due to the reaction force of the discharge pressure.

In the attachment / detachment device for the submersible pump of Patent Document 2, the moment is reduced by providing the stopper near the center of the flange surface, and the submersible pump rotates around the stopper by the reaction force of the discharge pressure. It becomes difficult. Although details are unknown, it can be assumed that the fulcrum A of the locking tool is in horizontal line contact. In this case, there is no problem if the fulcrum A is below the center of the flange surface, but if it is slightly above, the flange surface opens due to the reaction force of the discharge pressure.
Also, although the front view is unknown, the wedge-shaped opening of the flange is located at the top from the side sectional view, and the flange of the water pumping device also becomes divergent as it goes downward, so the flanges of both devices Becomes big and heavy.

The present invention has been made to solve the problems of the conventional device, and prevents the occurrence of water leakage from the gap between the flange connecting the submersible pump and the detachable stand due to the reaction force of the pump discharge pressure, and Provided is a detachable device for a submersible pump that is easily detachable.

The present invention relates to an attaching / detaching apparatus for a submersible pump, which raises and lowers a submersible pump having a hook-shaped expanding portion along a guide rail and detachably engages with a retaining ring of a detachable stand installed in a suction tank. A wedge-shaped abutment seat is formed on the locking ring, and a slidable portion facing the abutment seat is provided on the expanding portion. And a stopper formed continuously in the left, right, up and down directions over the submersible pump, and can be easily attached and detached and firmly engaged by the weight of the submersible pump. In addition, by receiving the load of the opening moment due to the reaction force of the discharge pressure of the submersible pump in the engaging portion formed continuously in the vertical direction, the lower part of the submersible pump opens and the gap between the detachable flange and the locking ring opens. Leakage can be prevented from occurring.

When a reinforcing material is attached to the locking device and a semicircular opening corresponding to the guide rail is formed in the reinforcing material, the submersible pump can be raised and lowered vertically while sliding the opening along the guide rail. it can. In addition, since it is also used as a guide for the guide rail, a simple and lightweight configuration can be obtained.

According to the present invention, the submersible pump is easily attached to and detached from above because it is locked by the hook-shaped locking tool on the submersible pump side and the wedge-shaped locking ring on the discharge pipe side, and the watertightness of the submersible pump is firmly maintained by its own weight. . In addition, since the contact surface at the locking point is formed continuously including the vertical direction, a load in the opposite direction acts on the opening and closing moment due to the reaction force of the submersible pump, above and below the contact surface at the locking point. To suppress the lower opening of the submersible pump. Therefore, there is no water leakage from the gap between the submersible pump and the detachable stand, and the operation efficiency during water supply is improved. Furthermore, since the reinforcing member of the locking tool is also used as a guide tool for the guide rail, the weight is simple and light.

FIG. 3 is a partial longitudinal sectional view showing a detachable state of the submersible pump and the discharge pipe according to the present invention. It is a side view of a submersible pump similarly. Similarly, it is a rear view of a submersible pump. FIG. 4 is a sectional view taken along line BB of FIG. 3. Similarly, it is the side view and front view of a detachable stand. Similarly, it is a partial longitudinal cross-sectional view of the locking tool when the submersible pump and the detachable stand are connected. FIG. 2 is a sectional view taken along the line AA of FIG. 1. It is a rear view of a submersible pump of another example concerning the present invention. Similarly, it is a front view of a detachable stand of another embodiment.

FIG. 1 is a side view showing a detachable state of a submersible pump and a discharge pipe according to the present invention.
A submersible pump 1 installed in a suction tank has an impeller (not shown) built in a pump casing 2, a suction cover 3 for guiding low-level flowing water to a suction side of the pump casing 2, and a detachable stand 4 for a discharge side. And a detachable flange 5 to be attached to the camera.

The detachable stand 4 is fixedly arranged at the bottom of the suction tank, and the flange on the suction side is constituted by a locking ring 13 for locking the submersible pump. On the discharge side of the detachable stand 4, a flange 7 connected to the water pipe 6 is provided.

A suspension ring 8 is provided on the top wall of the pump casing 2, and an end of a suspension member 9 such as a chain is locked to the suspension ring 8 from above, and the submersible pump 1 is raised and lowered. A pair of guide rails 10 extending upward is provided at the upper part of the detachable stand 4, and is engaged with a reinforcing member (guide tool) 11 having a semicircular opening provided in the submersible pump 1, so that the submersible pump 1 is submerged. The pump 1 can be moved vertically. A hook 12 having a hook-shaped (reverse U-shaped) lower portion is erected on the detachable flange 5 of the submersible pump 1, and a catch ring 13 of the detachable stand 4 is provided at a position facing the catch 12. Therefore, it is configured to be detachable from above.

2 and 3 are a side view and a rear view of the submersible pump.
In the present embodiment, a horizontal shaft submersible pump is employed as the submersible pump 1, and an impeller that rotates by a main shaft connected to a submersible motor (not shown) is built in the pump casing 2 and flows in from below the suction cover 3. Water is pressurized by an impeller and discharged from the detachable flange 5.

At the upper part of the pump casing 2 on the side of the detachable flange 5, two locking members 12 are provided along the outer ring. Specifically, a locking tool 12 is provided diagonally above and below the detachable flange 5 so as to be symmetrical. Each of the locking members 12 is continuously formed in a predetermined section from the side part to the upper part of the detachable flange 5, and the lower part is expanded in a hook shape (inverted U-shape) so that the detachable stand 4 is opened. It is detachably engaged with the engagement ring 13 from above.

Since the locking tool 12 is formed continuously in the left-right and up-down directions in parallel with the detachable flange 5, the load of the opening moment due to the reaction force of the submersible pump 1 is received by the upper and lower engaging portions, and the The lower part does not open.

The locking member 12 needs to have strength to support the weight of the submersible pump 1 and thrust during operation, and a reinforcing material may be provided as necessary. In the present embodiment, reinforcing members 11 and 15 erected from the pump casing 2 and the detachable flange 5 are provided at both ends of each locking member 12, and the reinforcing members 11 located near the top are semicircular. And also serves as a guide for the guide rail 10.

FIG. 4 is a sectional view taken along line BB of FIG.
The locking members 12 provided at two upper portions of the pump casing 2 include reinforcing members 11 and 15 at both ends of the locking member 12, respectively. The locking member 12 is provided upright on the upper part of the pump casing 2 so that a hook-shaped (inverted U-shaped) expanded portion faces downward, and protrudes rearward of the detachable flange 5. The reinforcing member 15 is provided at one end of the locking member 12 as shown in the figure, and distributes the load applied to the locking member 12 to the pump casing 2 together with the reinforcing member 11 provided at the other end. Note that the shape, position, and the like of the reinforcing material can be appropriately determined according to design conditions.

The leading end of the hook-shaped (inverted U-shaped) expanding portion of the locking device 12 includes a sliding contact portion 16 having an inclined surface whose inner peripheral surface expands outward.

FIG. 5 is a side view and a front view of the detachable stand.
The detachable stand 4 includes a tubular pipe 17, a locking ring 13 for locking the submersible pump 1 on the suction side of the pipe 17, and a flange 7 for connecting to the water pipe 6 on the discharge side of the pipe 17. And formed.

The locking ring 13 is a member that engages with the locking tool 12 of the submersible pump 1, and has a wedge-like shape in which the outer peripheral edge located above the vicinity of the center of the pipe is inclined downward toward the pipe 17. It has an abutment seat 18. The abutment seat 18 engages with the sliding contact portion 16 of the submersible pump 1, and the surfaces thereof are pressed by the weight of the submersible pump 1 to be tightly connected to each other, so that the submersible pump 1 is difficult to separate.

In the present embodiment, the suction tank is fixedly disposed at the bottom, but a member for fixing the suction tank may be appropriately configured as necessary. Although a flange 7 connected to the water pipe 6 is provided on the discharge side of the detachable stand 4, a flap valve may be provided when discharging directly to the discharge tank.

FIG. 6 is a partial vertical sectional view of the locking tool when the submersible pump and the detachable stand are connected.
The mounting and dismounting of the submersible pump 1 is performed by sliding the sliding portion 16 of the locking member 12 provided on the submersible pump 1 into and out of contact with the contact seat 18 of the locking ring 13. At this time, since both the sliding contact portion 16 and the contact seat 18 have the same inclined surface, it is possible to more firmly engage the submersible pump 1 by its own weight and to easily separate it.

When the locking device 12 is locked, the sliding contact portion 16 and the surface of the contact seat 18 are tightly connected to each other by the weight of the submersible pump 1 applied to the locking device 12. 13 firmly supported.

FIG. 7 is a sectional view taken along line AA of FIG.
The submersible pump 1 is suspended from above along the guide rail 10, and the two locking members 12 are engaged with the locking ring 13 of the mounting / dismounting stand 4 to connect the submersible pump 1 and the mounting / dismounting stand 4. At the time of connection, the two left and right locking members 12 are continuously engaged in a predetermined section along the outer ring of the locking ring 13 of the detachable stand 4. Since the locking ring 13 is annular, it is engaged not only on the left and right but also on the upper and lower sides, and the lower part of the submersible pump 1 does not open due to the opening moment due to the reaction force of the submersible pump 1.

Of the reinforcing members provided at both ends of the locking member 12, the reinforcing member 11 located near the top is used as a guide for the guide rail 10. The guide 11 extends toward the guide rail 10 and has a semicircular opening corresponding to the guide rail 10. When attaching and detaching the submersible pump 1, the submersible pump 1 is moved up and down in the vertical direction while sliding the opening along the guide rail 10. Since the reinforcing material of the locking tool 12 is also used as the guide tool 11 of the guide rail 10, a simple and lightweight configuration can be obtained.

FIG. 8 is a rear view of a submersible pump of another embodiment according to the present invention, and FIG. 9 is a front view of a detachable stand of another embodiment.
The sliding portion 16 of the locking member 12 of the submersible pump 1 and the abutment seat 18 of the locking ring 13 of the detachable stand 4 for locking with the submersible pump 1 are formed obliquely straight. The submersible pump 1 can be easily attached and detached from above, and since the locking member 12 is continuously slid in the up, down, left, and right directions, the downward opening of the submersible pump 1 against the opening moment of the submersible pump 1 can be suppressed.

In the present invention, these are applied to a horizontal shaft submersible pump, but they may be applied to other types of pumps such as a vertical shaft centrifugal pump. Further, in the present invention, the reinforcing member 11 of the locking tool 12 is used as a guide tool of the guide rail 10, but it can be used as a dedicated member as needed.

Further, in the present embodiment, the form in which the locking tool 12 is formed in a circumferential shape and a straight line shape is disclosed. Not limited.

Like the conventional submersible pump, it can be easily attached and detached from above, and can be applied to various drainage stations without special repair work. In addition, since the pump does not require a pump weight against the rotational moment generated by the pump thrust, the weight of the pump body can be reduced, and the present invention can be applied to a vertical shaft and a horizontal shaft pump regardless of the type of the pump.

DESCRIPTION OF SYMBOLS 1 Submersible pump 4 Detachable stand 5 Detachable flange 10 Guide rail 11 Reinforcement (guide tool)
DESCRIPTION OF SYMBOLS 12 Locking tool 13 Locking ring 15 Reinforcement material 16 Sliding contact part 18 Abutment seat

Claims (2)

The submersible pump (1) having the hook-shaped stopper (12) is moved up and down along the guide rail (10), and is detachably engaged with the stopper ring (13) of the detachable stand (4) installed in the suction tank. In the attachment and detachment device of the submersible pump to stop,
An abutment seat (18) formed in a wedge shape on a locking ring (13) of the detachable stand (4);
A sliding contact portion (16) opposed to the contact seat (18) is provided on the expanded portion of the locking tool (12).
The latching device (12) is provided symmetrically above and below the detachable flange (5) of the submersible pump (1), and is formed continuously in the horizontal and vertical directions over a predetermined section. Detachable device A reinforcing member (11, 15) is attached to the locking member (12);
2. A submersible pump attachment / detachment device according to claim 1, wherein a semicircular opening corresponding to the guide rail (10) is formed in the reinforcing member (11).

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