JP2636966B2 - Submersible pump for drain with cutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved horizontal single-suction submersible pump for transferring sewage and filth mixed with fibrous foreign matter.

[0002]

2. Description of the Related Art Conventionally, a submersible pump is used by immersing the entire pump in a liquid together with a motor. For this purpose, a horizontal shaft single-piece suction submersible pump is used.

[0003]

However, such a horizontal shaft single-piece suction submersible pump is used in a sewage system where the fibrous foreign matter is mixed into the treated water in a sewage pipe or a sewage treatment plant.
When used for the transfer of filth, fibrous solids, such as gloves, cloth, and underwear, are often mixed in the sewage, and these are clogged by pumps, bitten by impellers, and are smoothly discharged. In addition to blocking rotation, the resistance increases and the pump cannot be rotated or damaged, and the motor may be burned. There is also a problem in terms of maintenance and work handling,
In addition, there has been a problem that a good operation state cannot be maintained for a long period of time.

The present invention solves these problems by providing a large passage cross-sectional area so that the fibrous solids can easily pass through when sewage or filth mixed with fibrous foreign matter is sucked. A sewage treatment plant where the fibrous solids are cut and can be smoothly pumped and contaminated,
It is an object of the present invention to provide a submersible pump for a sewer with a cutter suitable for transferring sewage and filth from a night soil treatment plant.

[0005]

In order to achieve the above-mentioned object, according to the present invention, in order to increase the suction force, an impeller is provided.
Fix the disk at the back of the boss to be attached to the drive shaft
The front of the disk gradually moves from the boss to the outside.
Next, use multiple spiral impellers with reduced height.
This impeller and suction cover facing it
A cutting mechanism is provided at two positions to cut off contaminants
Is performed reliably. Hereinafter, the present invention
Embodiment of a submersible pump for drainage with a cutter of FIGS. 1 to 6
The present invention will be described with reference to the following reference numerals.
A suction cover 6 faces the impeller 8 on the front of
In the arranged horizontal shaft single suction submersible pump, the impeller 8
Is attached to the drive shaft 4 as shown in FIGS.
The disk 25 is fixed to the rear part of the boss 18
On the front, gradually lower the height from the boss to the outside.
Provided with a plurality of spiral impellers,
A step is formed in the intermediate portion, and the step (shown by the step edge 21a) is formed.
Of the suction cover 6 into the central suction hole 11 of the suction cover 6.
And the suction cover on the front side
A spiral wing 21 protruding forward from the suction hole 11 of
And a pump for pumping water to the discharge port 9 on the rear side of the fitting portion.
The pump impeller 20 and the fitting portion
Cutting edge on the side edge of 21a (corresponding to side edge blade 19 and cutting blade 22)
Is formed. On the other hand, the suction cover 6 is
The surface facing the impeller 20 faces the center suction hole 11 side.
Into a conical surface 10 and several rounds on the inner circumference of the suction hole 11.
Forming an arc-shaped notch 13 extending outward from the surface 10
Then, all the inner edges of the suction hole 11 and the notch 13
Inner blade 14 for pinching and cutting impurities with the cutting blade 22 of the part
Is formed, and the concavity 1 for contaminant intervention is formed in the conical surface 10.
5 and the pumping impeller 2 on its inner periphery.
0 for cutting off foreign matter in the recess 15 with the cutting edge 19
A cutting blade (corresponding to the spiral blade 16) is formed. Further
At the same time, the arc-shaped notch 13 is
Two adjacent to each other in the W-shape, and the center of the W-shape
The portion 13a also faces the same trajectory surface as the inner edge of the suction hole 11, and
Boundary portion 13b between recess 11 and notch 13 and W-shaped center
The cutting edge 14 can also be formed in 13a.

[0006]

The submersible pump is submerged in the sewage in the sewage pipe for cleaning, replacing laying, and sewage treatment plants.
, The sewage is cut into an integral cutting impeller 23.
(Corresponding to the step portion and the spiral blade 21) and the pumping impeller 20
The rotation of the impeller 8 consisting of
Is sucked into the vortex chamber 12 in the impeller 5 and is rotated by the rotation of the impeller 8.
Through the periphery of the vortex chamber 12 and from the discharge port 9 as appropriate
The water is sent to a predetermined position through the drain pipe. This and
And the wastewater contains fibrous solids and foreign matter
And those fibrous solids are spiraled by the cutting impeller 23
It is sucked in while being wound from the tip by the wing 21. this
At this time, even if a large fibrous solid is
Since there is a notch 13 in the shape of a circular arc, the spiral blade 21
It is sucked into the space created by the notch 13 and
Inside of the cutting blade 22a, the suction hole 11 and the notch 13 of 21a
It is nipped and cut by the inner blade 14 at the edge . In addition, this
Notches 13 are adjacent to each other at each location of the suction hole 11.
The W-shaped central part 13a is also provided in the suction hole 11
The suction hole 11 and the notch 1
3 at the boundary 13b and the W-shaped center 13a
Can be cut by the pinching action of
Indeed, cutting of solids is promoted. In addition, suction
On the inner conical surface 10 of the bar 6,
Since the cutting edge 16 is formed, the conical surface 10
With the cutting blade 19 on the front side of the pumping impeller 20 rotating in contact with
Engagement further reduces fibrous solids and contaminants
And can be discharged to the discharge port 9 together with the waste water.
You . In this case, the cutting blade 22 at the fitting portion and the inner blade 1 around the suction hole are used.
4 and a fibrous solid whose length direction is perpendicular to the drive shaft 4.
It is possible to cut off the material, and further, the side of the pumping impeller 20
The length direction of the fiber is driven by the edge blade 19 and the cutting blade 16 of the recess 15.
The fibrous solid material in the axial direction of the driving shaft 4 can be cut,
Even with fibrous solids sucked from the direction of misalignment,
Cutting can be performed more reliably. In addition, 3
A tom-shaped recess 15 is formed by the individual recesses 15, and furthermore,
A recess 15a is formed along the suction hole 11 side of the recess.
In this way, even large contaminants can pass through recesses and grooves.
And easily discharged from the end of the streamlined recess to the discharge port side
Will be able to do that. In addition, pumping impeller 20
Of the outer peripheral portion of the impeller 8 and the vortex chamber outside the impeller 8
If the cross-sectional area of the passage 12 is increased, impurities may
Can be discharged smoothly without clogging.

[0007]

An embodiment will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes an outer box containing a motor 2 in a single-suction horizontal submersible pump, 3 denotes a mechanical seal loading chamber provided with a shaft sealing portion 3a, 4 denotes a drive shaft directly connected to the built-in motor shaft, and 5 denotes a drive shaft. The casing of the submersible pump, 6 is a suction cover connected to a suction port 7 mounted on the front surface of the casing 5, 8 is an impeller mounted on the drive shaft 4, 9 is a discharge port of the casing 5, and 12 is a vortex chamber. Reference numeral 27 denotes a negative pressure impeller mounted on the drive shaft 4 between the mechanical seal loading chamber 3 and the rear end of the impeller 8 and having blades facing the shaft sealing mechanism. It is a deterrent.

The discharge port 9 has a pipe mounting port 2.
8 and an appropriate discharge pipe 29 in parallel with the motor shaft.
Are connected to send and discharge sewage and waste to required places. Reference numeral 30 denotes a moving caster mounted on both sides of a lower circumference outside the outer box 1 with a built-in motor and the mechanical seal loading chamber 3 so as to smoothly move in a narrow pipe which is mounted at an angle to match the inner diameter of the pipe. Provide.

In FIG. 2 to FIG. 3, the suction cover 6 has an inner surface facing the impeller 8 as a conical surface 10 whose central portion is concave toward the suction port 7 side. A suction hole 11 having a relatively large diameter through which a fibrous solid material passes is provided.
A vortex chamber 12 having a large cross-sectional area for facilitating the passage of fibrous solid matter mixed into sewage and sewage is formed in combination with the shape of the vortex chamber. A semicircular W-shaped notch 13 is provided at several locations on the inner edge of the suction hole 11, and corners along the entire inner periphery of the suction hole 11 and the notch 13 are formed on the inner blade 14, and a conical surface around the same. 10, a spiral blade with a sharp angle formed around it through a streamlined recess 15 forming a tomogram extending from the inside to the outside in three directions and a narrow groove 15a formed along the inner periphery of the recess. 16
To form The suction cover 6 has a mounting bolt hole 17 for the suction port 7 mounted on the front surface thereof.

Referring to FIGS. 4, 5 and 6, the impeller 8 is a disk 25 integrated with a boss 18 mounted on the drive shaft 4.
On the front surface of the pumping impellers 20, a plurality of pumping impellers 20 having a side edge blade 19 that is in contact with the conical surface 10 from the periphery of the boss 18 and curved in a spiral shape. A spiral blade 21 rotatably fitted into the suction hole 11 through a step 21a;
A cutting impeller 23 is provided integrally with a cutting blade 22 provided on an outer peripheral portion that rotates closely with the cutting blade 1. The inner blade 14 and the cutting blade 22 around the suction hole 11 mix with sewage and filth and are sucked. It is configured to cut and cut the coming fibrous solid.
An agitating blade 24 is provided around the tip of the boss 18 so as to form irregularities in the axial direction so that the contaminant can be hooked and agitated so as to be easily pulled in. On the back surface of the disk 25, thin blades 26 are formed around the boss 18 in three directions from the center.

In this submersible pump, a cooling box for water supply and liquid supply (such as bentonite) connected to a water supply pipe provided inside the pipe for cooling the motor 2 is installed diagonally above the outer box 1 containing the motor. A motor cooling system for cooling by water supply and liquid supply can be adopted. By doing so, it is possible to reduce the size of the submersible pump provided with the motor cooling mechanism that works while appropriately moving inside the sewer pipe.

[0013]

Since the present invention is configured as described above, it has the following effects.

According to the submersible pump of the present invention, a fibrous solid substance mixed in the pump is sucked while being wound from the tip of the impeller, and the sharp and durable impeller and the inner periphery of the suction hole formed in the suction cover are formed. The solid material is finely cut by a cutter blade including a blade and a spiral blade, so that blockage in a pump or a pipe can be reliably and easily prevented.

Furthermore, since the vortex chamber has a large passage cross-sectional area so that solids can easily pass therethrough, and fibrous foreign substances mixed into the sewage and filth can be easily cut off. Since the load can be significantly reduced and the water can be discharged smoothly, a highly efficient and durable submersible pump with less clogging and failure in the pump and piping can be provided, and sewage from sewage treatment plants and human waste treatment plants, It can be widely used for waste transfer, livestock excreta discharge, transfer, and other similar applications.It is ideal as a large-volume submersible pump for transferring sewage and waste that contains fibrous foreign substances, and is an expensive pump. Compared to the main body, the impeller and the suction cover can be easily removed and replaced, so that there are effects such as easy maintenance.

This submersible pump is not limited to the above-mentioned use, but can be used as a submersible / land-based pump that can be used even at a submerged site due to abnormally high water in a river during a typhoon or flooding.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing the entirety of a submersible water pump with a cutter according to the present invention.

FIG. 2 is a side view of the suction cover used in the present invention as viewed from the inside.

FIG. 3 is a sectional view of FIG. 2;

FIG. 4 is a perspective view of an impeller used in the present invention.

FIG. 5 is a side view of the impeller.

FIG. 6 is a front view of the inhera. Reference Signs List 2 Motor 4 Drive shaft 5 Casing 6 Suction cover 7 Suction port 8 Impeller 9 Discharge port 10 Conical surface 11 Suction hole 12 Vortex chamber 13 Notch 14 Inner blade 15 Tomoke-shaped recess 15 Thin groove 16 Vortex blade 18 Boss 19 Side edge blade 20 Pumping impeller 21 Spiral wing 22 Cutting blade 23 Cutting impeller. 24 stirring blades 25 disk

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Showa 50-122002 (JP, U) Japanese Utility Model Showa 51-120504 (JP, U)

Claims (2)

(57) [Claims] 1. A front surface of a casing facing an impeller.
Horizontal suction suction pump with suction cover
In addition, the impeller has a disk at the rear of the boss attached to the drive shaft.
To the front of this disk from the boss to the outside
Providing a plurality of spiral impellers with gradually lower height,
A step is formed in the middle of this spiral impeller, and this step
With a fitting part that fits into the central suction hole of the suction cover.
And the front side more than the suction hole of the suction cover
Is also a spiral wing that protrudes forward, and discharges from the
A pumping impeller for pumping water to the outlet
A cutting blade is formed on the side edges of the propeller and the fitting portion, and the suction cover has a surface facing the pumping impeller.
Conical surface toward the center suction hole side
An arc-shaped notch that extends outward from the conical surface in several places around the circumference
Is formed on the entire inner edge of the suction hole and the notch.
Forming an inner blade for pinching and cutting impurities with the cutting blade,
A concavity for contaminant intervention is formed on the conical surface.
In the inner periphery, the cutting edge of the pumping impeller and the inside of the recess
A submersible pump for a sewer with a cutter, wherein a cutting blade for cutting impurities is formed . 2. The method according to claim 1, wherein the arc-shaped notch is formed by the inner circumference of a suction hole.
At each location, two are provided adjacent to each other to form a W-shape.
The center part also faces the same trajectory plane as the inner edge of the suction hole, and cuts off the suction hole.
A cutting edge is formed at the boundary of the notch and the center of the W shape.
The submersible pump for a sewer pipe with a cutter according to claim 1.