JP2584387Y2 - Suction path configuration of vertical submersible pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a suction path configuration of a vertical submersible pump.

[Prior art and its problems] In a conventional submersible pump, as shown in FIG. 5, a bottom plate 7 'is fixed at a position largely separated from a lower bottom surface of a suction cover 3' and a suction path to a pump suction port 4 '. 12 'is formed by a stand-shaped annular strainer having a number of small holes 10'... 10 'formed in the entire surface of the peripheral wall 6'.
Surrounding the area.

In such a conventional structure, the region for sucking the liquid of the annular strainer exists only below the lower edge of the pump casing 1 ', and the distance S from the lower bottom surface of the suction cover 3' to the inner bottom surface of the bottom plate 7 '. ′ And therefore the overall height of the pump.

A large number of small holes 10 '... 10' are provided on the entire surface of the peripheral wall 6 '.
A thick metal plate must be used to maintain the strength to support the full load of the pump in a stand-type annular strainer that drills a hole, but it is difficult to integrally form a thick metal plate by drawing. Therefore, a manufacturing method is adopted in which the peripheral wall 6 ′ and the bottom plate 7 ′ which are separately press-molded are combined at the time of assembling, and the number of parts and the number of assembling steps also increase.

Further, when a pump is used for a fluid containing a slurry such as discharge of spring water at a civil engineering work site, a normal metal pump casing and a suction cover are severely worn. If it is made of rubber, the abrasion resistance increases, but since it has a small Young's modulus, it deforms when pressure is applied, which adversely affects the pump performance.

[Purpose of the Invention] The purpose of the present invention is to provide a vertical submersible pump that is capable of reducing the overall height of the pump, has excellent abrasion resistance, and can prevent deformation of the suction cover. Is to make up.

[Structure of the invention] In the suction passage structure of the vertical submersible pump according to the invention, a column-shaped bolt screw seat is guided from the lower surface of the peripheral portion of the lower wall of the oil casing, and a screw hole is vertically provided from the lower end thereof. A vertical hole made of a wear-resistant elastic material such as rubber and having a vertical hole formed in the pump casing and having a vertical hole to be fitted with the screw seat is superimposed on a peripheral portion of a lower surface of the lower wall of the oil casing. And a peripheral portion of the upper surface of a suction cover having a pump suction hole in the center made of an abrasion-resistant elastic material such as rubber is superimposed on the lower surface of the peripheral wall component member, and the pump suction seat is fitted. On the lower surface of the peripheral portion of the mouth, a convex element approaching to the bottom plate described below is arranged, and at a peripheral portion of the bottom plate constituting the lower end surface of the stand-type annular strainer fitted with the outer peripheral surface of the peripheral wall component member and the outer peripheral surface of the suction cover. , Launched upward The suction cover has a stepped portion that comes into contact with the peripheral portion of the lower surface of the suction cover, and a bolt insertion hole that is concentric with the screw hole is formed, and the remaining portion is separated from the lower surface of the suction cover so as to maintain a constant interval. A recess is formed at an important point on the outer peripheral surface of the peripheral wall constituting member and the suction cover, and a recess is formed on the peripheral surface of the annular strainer. The through hole is arranged so that the surplus portion is made non-porous, and a rib whose outer edge is close to the inner periphery of the peripheral wall of the annular strainer is vertically provided in the above-described recess, and the through hole is formed on the side thereof. And a mounting bolt is screwed into the screw hole through the bolt insertion hole, so that the oil caching lower wall, the peripheral member of the pump casing, the suction cover, and the stand-shaped annular strainer are provided. The toner attached together, it is the allowed to form a suction passage leading to the pump inlet through the lower surface of the suction cover through the longitudinal groove from hole of the annular strainer.

[Embodiment] An embodiment will be described below with reference to the drawings.

Reference numeral 1 denotes a peripheral wall constituting member of a pump casing made of a wear-resistant elastic material such as rubber, 2 denotes an impeller housed in a swirl chamber 13 described later, and 3 denotes a material similar to the peripheral wall constituting member 1. A suction port 4 is opened at the center of the suction cover, and convexes 5... 5 approaching onto a bottom plate 7 to be described later are provided on the lower surface of the peripheral portion of the suction port 4. I have. 6 is a peripheral wall component 1 and a suction cover 3
An annular strainer 7, which is fitted to the outer peripheral surface of the annular strainer 7, is a bottom plate which forms the lower bottom surface of the annular strainer 6, and has a step 8 .., And an extra portion thereof is formed so as to be spaced apart from the lower surface of the suction cover 3 so as to have a constant interval S. On the outer peripheral surfaces of the peripheral wall component 1 and the suction cover 3, recesses 9... 9 separated from the inner peripheral surface of the peripheral wall of the annular strainer 6 are recessed at key points, and these recesses 9. ..Rib 9a whose outer edge is in contact with the inner peripheral surface of the peripheral wall of annular strainer 6
.. 9a are installed vertically, and vertical grooves 9b... 9b are held beside the ribs 9a. Also, on the peripheral wall of the annular strainer 6, through-holes 10... 10 are provided only at portions facing the recesses 9. 14
... 14 is a column-shaped bolt screw seat led down from the lower surface of the peripheral part of the oil casing lower wall 15, and 16 ... 16 are vertical from the lower end of each bolt screw seat 14 ... 14 It is a screw hole provided. 17 are vertical holes formed in the peripheral wall component 1 so as to fit with the screw seats 14.
Are bolt insertion holes drilled in the peripheral steps 8... 8 of the bottom plate 7 so as to be concentric with the screw holes 16.
... Reference numeral 11 denotes a mounting bolt.

Then, the vertical hole 17 is formed so that the peripheral wall constituting member 1 of the pump casing is superimposed on the periphery of the lower surface of the lower wall 15 of the oil casing.
17 are fitted with the bolt screw seats 14... 14, the suction cover 3 is overlapped on the lower surface of the peripheral wall component 1, and the stand-type annular strainer 6 is connected to the peripheral wall component 1 of the pump casing and the suction. The fitting bolt 11 is fitted to the outer peripheral surface of the cover 3 and is inserted through the bolt insertion holes 18.
························································································································ 11 , Annular strainer 6
9 through the vertical grooves 9b,..., 9b, and through the lower surface of the suction cover 3 to the pump suction port 4.

[Effects] According to the suction channel configuration of the present invention, the region where the strainer sucks the liquid extends to the upper edge of the pump casing peripheral wall component 1 due to the presence of the vertical grooves 9b.
There is no need to increase the distance S between the lower surface of the suction cover 3 and the bottom plate 7, and the overall height of the pump can be reduced. The peripheral wall of the annular strainer 6 is provided with 10... 10 only at the portion facing the outer peripheral surface recesses 9... 9 of the pump casing peripheral wall constituting member 1, and the remaining portion is non-porous. Therefore, even a thin metal plate has sufficient strength,
It can support the entire load of the pump and is advantageous in workability such as drawing and drilling.

Further, since the pump casing peripheral wall constituting member 1 and the suction cover 3 are made of rubber or the like, they have excellent wear resistance, can sufficiently withstand drainage of waste water containing slurry, and have a lower surface around the pump suction port 4. Convex 5 arranged in
... 5 can be brought close to the bottom plate 7, so that deformation of the bottom plate 7 due to pressure can be prevented. Furthermore, bolt screw seat 14 of oil casing lower wall 15 ...
14 is a vertical hole 17 of the pump casing peripheral wall component 1.
17 and the structure in which the ribs 9a... 9a of the pump casing peripheral wall component 1 are in contact with the inner peripheral surface of the peripheral wall of the annular strainer 6 to prevent deformation of the pump casing during operation and lift. There is an advantage that liquid leakage does not occur.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view of a main part of a vertical submersible pump having the suction passage configuration of the present invention, FIG. 2 is a bottom view of a pump casing constituent member in the suction passage configuration of the present invention, and FIG. FIG. 4 is a bottom plan view of the suction cover, FIG. 4 is a cross-sectional plan view of the annular strainer in the suction channel configuration of the present invention,
FIG. 5 is a vertical sectional side view of a main part of a conventional vertical submersible pump having a suction passage configuration. 1 ... peripheral member of pump casing, 3 ... suction cover, 4 ... pump suction port, 5 ... convex, 6 ...
Stand type annular strainer, 7 Bottom plate, 8 Step, 9 Depression, 9a Rib, 9b Vertical groove, 10 Through hole, 11 Mounting bolt, 12 Suction path, 14… Bolt screw seat, 15… Bottom wall of oil casing, 16 …… Screw hole,
17… vertical hole, 18… bolt insertion hole, S… interval.

Claims (1)

(57) [Scope of request for utility model registration] 1. A column-shaped bolt screw seat (14) is guided from the lower surface of a peripheral portion of an oil casing lower wall (15), and a screw hole (16) is vertically provided from a lower end thereof. The peripheral member (1) of the pump casing, which is made of a wearable elastic material and has a vertical hole (17) fitted with the screw seat (14), is attached to the periphery of the lower surface of the oil casing lower wall (15). The bolt screw seat (14) is fitted into the vertical hole (17) so as to overlap the part, and the suction cover (3) having a pump suction hole (4) at the center made of a wear-resistant elastic material such as rubber. ) Is overlapped on the lower surface of the peripheral wall constituting member (1), and a projection (5) approaching onto a bottom plate (7) described below is disposed on the lower surface of the peripheral portion of the pump suction port (4). A stand-type annular strainer (6) fitted to the outer peripheral surfaces of the peripheral wall component (1) and the suction cover (3). Bottom plate that constitutes the lower end surface (7)
A stepped portion (8) which is lifted upward and comes into contact with a peripheral portion of the lower surface of the suction cover (3), and has a bolt insertion hole (18) concentric with the screw hole (16). ), And the remaining part is a suction cover (3)
Is formed so as to have a constant interval (S) apart from the lower surface of the annular strainer (6) from the inner peripheral surface of the peripheral wall of the annular strainer (6). The recess (9) which is spaced apart is recessed, and a large number of through holes (10) are provided on the peripheral wall of the annular strainer (6) only at a portion facing the recess (9), and the remaining portion is non-porous. And none
In addition, a rib (9a) whose outer edge is close to the inner periphery of the peripheral wall of the annular strainer (6) is vertically provided in the recess (9), and the side thereof communicates with the through hole (10). By holding the vertical groove (9b) and screwing the mounting bolt (11) into the screw hole (16) through the bolt insertion hole (18), the peripheral wall configuration of the oil casing lower wall (15) and the pump casing Member (1),
The suction cover (3) and the stand-type annular strainer (6) are integrally joined, and the suction of the pump is performed through the through hole (10) of the annular strainer (6), through the longitudinal groove (9b), and under the suction cover (3). A suction channel configuration of a vertical submersible pump, wherein a suction channel (12) leading to a mouth (4) is formed.