JP2598198Y2 - underwater pump - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a submersible pump provided with a strainer below a pump casing.

[0002]

2. Description of the Related Art Generally, a submersible pump is provided with a strainer so that dust and the like do not enter a pump casing together with a sucked fluid, and the strainer captures and filters the dust and the like. In the conventional case, a strainer is fixed to the lower part of the pump casing via a bolt, and since the strainer is located at the lowermost part of the pump casing, the strainer supports the weight and load of the pump unit and the electric motor unit. Had become.

[0003]

However, since the strainer captures debris and the like, the debris may block or clog the strainer. For this reason, it is sometimes necessary to clean the strainer, at which time the strainer must be removed from the pump casing. In such a case, since the strainer is fixed to the pump casing with a large number of bolts, it takes time and trouble to remove and re-attach, and therefore, the workability of maintenance and inspection is poor.

Further, in the conventional case, since the weight and load of the pump section and the electric motor section are supported by the strainer, large rigidity and strength are required for the strainer, and expensive materials are used and the weight is increased. There was also.

The present invention has been made based on the above circumstances, and an object of the present invention is to provide a submersible pump in which the strainer can be easily maintained and the strainer can be manufactured at a low weight and at a low cost. .

[0006]

In order to achieve the above object, the invention according to claim 1 is divided into an upper side and a lower side.
With a joint flange at the divided opening edge.
Having a casing dividing member made of a synthetic resin member,
Join the joining flanges of the casing split members together
To form a pump casing with a suction port on the front.
In the submersible pump provided with a strainer for filtering the suction fluid in the lower portion of the pump casing, the legs of projects from the bottom of the pump casing to support the load of the pump
In the lower part of the pump casing, the height of the leg is
The strainer is positioned so that it does not exceed
From the bottom with the joint flange part joined to each other
When it is formed in a cylindrical container shape with an enclosed wall that fits
In addition, the joint flange portion is provided at a plurality of locations on the enclosure wall.
A locking claw is formed to be elastically deformable with the upper side.
The strainer is detachably attached to a lower portion of the pump casing by engagement of a locking claw with the joining flange portion .

[0007]

According to the first aspect of the present invention, the weight and load of the pump section and the electric motor section are supported by the legs provided on the pump casing, so that the strainer does not need to have great rigidity and strength. And can be made of inexpensive materials. And, strainer from attaching desorption possible to the Ponpukeshigu through the locking pawl, desorption is easy, maintenance, inspection, it is easy to handle in the case of cleaning and the like. Moreover, the locking claws of the strainer are made of resin casing
Removably locks to the joint flange that joins the divided members
Therefore, this joint flange part becomes a hook part,
No special hooking part is required on the casing side. That
The surrounding wall surrounds the outer periphery of the joint flange,
Covers the outer periphery of the mating surface of the mating flange, so
No.

[0008]

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on a first embodiment shown in FIGS. FIG. 1 shows the whole of a synthetic resin submersible pump. In the figure, reference numeral 1 denotes a pump casing made of a synthetic resin such as a PPE resin. The pump casing 1 is divided into an upper casing 2 and a lower casing 3, and the divided members, that is, the resin upper casing 2 and the resin lower casing 3 are such that their divided adhesive surfaces are larger than other parts. It is formed thick and forms the joining flange portions 4 and 5 as shown in FIG. These joining flange portions 4 and 5 are joined by an adhesive 6 or ultrasonic bonding.

A back cover plate 7 is connected to the upper casing 2 constituting the pump casing 1, and an underwater motor 8 is connected to the back cover plate 7 via connection bolts 9. The drive shaft 10 of the electric motor 8 is guided through the back blocking plate 7 into the pump casing 1, and a resin impeller 11 is fixed to the introduction end by a nut 12. The impeller 11 is the pump casing 1
Is rotated in a horizontal position. The drive shaft 10 is sealed by a mechanical seal 13 with the back surface closing plate 7.

The lower casing 3 constituting the pump casing 1 is provided with a suction port 15 at a position facing the impeller 11, and an external liquid is sucked through the suction port 15. Outside the suction port 15, a strainer 30 described later is provided. The upper casing 2 constituting the pump casing 1 has a discharge port 16 formed on an upper surface at a position deviated to one side, and a discharge port flange 17 is connected to the discharge port 16 by bolts 18. . A discharge pipe (not shown) is connected to the discharge port flange 17.

The lower casing 3 made of resin of the pump casing 1 has legs 20. Legs 20
Are composed of support cylinders 21 formed integrally and projecting downward from the lower surface of the lower casing 3 and resin pillars 22 fitted to the support cylinders 21 respectively. 22 are press-fitted into the support cylinders 21 and joined together by an adhesive or the like. The lower surfaces of the pillars 22 contact the ground, so that the legs 20 support the weight and load of the pump unit and the electric motor 8.

The strainer 30 is detachably attached to the lower surface of the pump casing 1. That is,
The strainer 30 is formed of a synthetic resin such as a PPE resin, and the detailed structure is shown in FIG. The strainer 30 has a bottomed container shape, and has a number of transmission holes 31 formed on its rising side wall. This transmission hole 3
1, a fluid such as water is introduced from the outside, and the introduced fluid is sucked into the casing 1 through the suction port 15 of the pump casing 1. Then, the fluid passes through the permeation hole 3
When passing through 1,..., The passage of oversized dust and the like is prevented, that is, it is filtered. An enclosure wall 32 is formed at the upper end of the rising side wall. The surrounding wall 32 surrounds the outer periphery of the joining flange portions 4 and 5 of the upper casing 2 and the lower casing 3 that constitute the pump casing 1, and the surrounding wall 32 covers the joining flange portions 4 and 5. 5 covers the outer periphery of the mating surface.

A plurality of locking claws 33 are formed on the surrounding wall 32 so as to be spaced apart in the circumferential direction. These locking claws 33 extend from above the surrounding wall 32 as shown in FIG. 4, and furthermore, by forming slits 34, 34 on both left and right sides, the elastic deformation of the locking claws 33 is facilitated. ing. The engaging claws 33 are detachably engaged with the joining flange 4 of the upper casing 2. In other words, the joint flange portion 4 of the upper casing 2 is hooking portion.

Such a strainer 30 is covered from below the pump casing 1 so as to cover the suction port 15.
In this case, the surrounding wall 32 is fitted so as to surround the outer periphery of the joining flange portions 4 and 5 between the upper casing 2 and the lower casing 3, and the plurality of locking claws 33 are elastically deformed and the upper casing 2 To the joining flange portion 4 of FIG. Thereby, the strainer 30 is detachably attached to the pump casing 1. In such an attached state,
The lower surface of the strainer 30 does not protrude below the leg portion 20 and is separated from the ground. In addition, as shown in FIG.
Are formed with insertion holes 35 through which.

The operation of the embodiment having such a configuration will be described. In the submersible pump of the above embodiment, the legs 20 are formed on the pump casing 1 and the legs 20 reach the ground to support the weight and load of the pump unit and the electric motor 8. The load of the electric motor 8 does not act. For this reason, the strainer 30 may have lower rigidity and strength than the conventional one, and can be made of a thin and inexpensive material.

Further, since the strainer 30 is formed of a synthetic resin, a large number of transmission holes 31 and insertion holes 35 are formed.
And the enclosing wall 32 and the locking claws 33... Can be integrally formed, which facilitates manufacture. Such a strainer 30
Is made of a synthetic resin, so that the locking claws 33 can be easily elastically deformed.
Since it is provided with 34, it is easily elastically deformed. Since the locking claws 33 are locked to the joint flange portion 4 of the upper casing 2 by the elastic deformation of the locking claws 33.
Is easy to attach and detach, and is easy to handle for maintenance, inspection, cleaning, etc., and the workability is improved.

In addition , an enclosing wall 32 is formed on the strainer 30 and surrounds the outer periphery of the connecting flanges 4 and 5 between the upper casing 2 and the lower casing 3, and this enclosing wall 32 is a mating surface of the connecting flanges 4 and 5. Because it covers the outer circumference, even if the adhesive 6 protrudes from the mating surface,
The protruding adhesive is covered and the appearance is improved.

In the above embodiment, since the slits 34, 34 are provided on the left and right sides of the locking claws 33, the locking claws 3 are provided.
Although 3 is elastically deformed without difficulty, a slit 34 may be formed in the center of the locking claw 33 as in the second embodiment shown in FIG.

[0020]

[0021]

As described above, according to the first aspect of the present invention, since the weight and load of the pump unit and the electric motor unit are supported by the legs provided on the pump casing, no strain is imposed on the strainer, and the strainer is not affected. Therefore, a large rigidity and strength are not required, so that the strainer can be made of a lightweight and inexpensive material. The strainer, Ponpuke
The part of the shing itself, that is, the divided part of the resin casing
Structure that detachably locks to the joint flange that joins the materials
Therefore, another special hooking part is required on the pump casing side.
Can be attached and detached to the pump casing with a simple structure without the need
For maintenance, inspection and cleaning of the strainer.
Easy handling such as removal . In addition, the surrounding wall is
Covers the mating surface of the flange, which can improve the appearance
it can.

[0022]

[Brief description of the drawings]

FIG. 1 is a sectional view of a submersible pump showing a first embodiment of the present invention.

FIG. 2 shows a configuration of a strainer, (a) is a sectional view,
(B) The figure is a plan view.

FIG. 3 is an enlarged sectional view showing a portion A in FIG. 1;

FIG. 4 is a front view of the locking claw in the embodiment.

FIG. 5 is a front view of a locking claw showing another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Resin pump casing 2 ... Upper casing 3 ... Lower casing 4, 5 ... Joint flange 6 ... Adhesive 8 ... Electric motor 10 ... Drive shaft 11 ... Impeller 20 ... Leg 21 ... Support cylinder 22 ... Leg 30 ... Strainer 31 ... Transmission hole 32 ... Enclosure wall 33 ... Locking claw 34 ... Slit.

Claims (1)

(57) [Scope of request for utility model registration] An upper part and a lower part; and
Synthetic resin member with a joint flange at the divided opening edge
These casings
Join the joining flanges of the split members to each other
In a submersible pump having a pump casing having an inlet and a strainer for filtering suction liquid at a lower portion of the pump casing, a pump casing is provided at a lower portion of the pump casing.
Legs for supporting the load of the pump is projected, said pump
Do not exceed the height of the legs at the bottom of the casing
The strainer is arranged, and the strainer is disposed
An enclosure that fits from the bottom with the joint flange part
It is formed in a cylindrical container shape having a wall, and
Elastic deformation with the upper side of the above-mentioned joint flange at multiple places on the wall
A locking claw that locks the locking claw is formed.
A submersible pump wherein the strainer is detachably attached to a lower portion of the pump casing by engagement with a mating flange portion .