JP3231368B2 - Pumping equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slurry solution containing solid matter and a liquid having a relatively high viscosity, for example, for transferring sewage in a small merger tank. The present invention relates to a liquid pumping device provided for transfer of a liquid. 2. Description of the Related Art Slurry solutions in which solid matter is mixed,
It is well known that a screw pump is generally suitable for transferring a liquid having a relatively high viscosity. However, in the conventional screw pump, since a slight gap is formed between the outer peripheral portion of the helical rod rotated by the prime mover and the inner peripheral surface of the non-rotating cylindrical casing, watertightness is not maintained, so loss occurs. The pumping capacity cannot be sufficiently secured, and to compensate for this loss, the diameter of the helical rod and the diameter of the non-rotating cylindrical casing must be increased, and the area occupied by the screw pump in the tank increases. This results in a reduction in the effective volume in the tank. Also,
In order to rotate the spiral rod in the non-rotating cylindrical casing,
There is a disadvantage that a helical rod bearing device is required, the structure is complicated, and the manufacturing cost is increased. Furthermore, when the liquid level rises,
As the amount of water increases and the amount of pumped water decreases when the liquid level drops,
Resentment that quantitative transfer for the next process cannot be maintained
There is only. [0003] Conventional screw pumps that require a large occupied area are unsuitable for mounting in a small septic tank. Further, it is desirable that the structure be simple in order to manufacture at low cost. Furthermore,
A quantitative transfer to the process is also desired. An object of the present invention is to provide a small occupied area, a high pumping capacity, a simple structure and low cost, and to the next step.
And to provide a maintenance was provided that the liquid being pumped device quantification transfer. In the pumping device according to the present invention, a spiral rod is vertically mounted in a cylindrical casing having a lower end opening serving as a suction port and an upper end opening serving as an outlet. The outer peripheral portion of the spiral rod abuts against the inner periphery of the cylindrical casing to form a spiral pumping path from the suction port to the outlet, and the liquid collecting casing is fitted with the upper portion of the cylindrical casing. Open a discharge port on the outside, and the upper edge of the
Than the opening on the edge is set to a low position, and the a spout spiral lifting fluid path without so as to communicate, cylindrical Ke
Resistance fins protrude from the outside of the casing, and the helical rod and the cylindrical casing are integrally rotated by driving the prime mover. When the pumping device of the present invention is used, the prime mover is driven with the lower end suction port of the cylindrical casing opened to the liquid supply source and the discharge port of the liquid collecting casing opened to the liquid sending destination. . When the prime mover is driven, the helical rod rotates together with the cylindrical casing, and the liquid of the liquid supply source is sucked in from the inlet with the contaminants, reaches the liquid collecting casing from the outlet through the helical pumping path, and reaches the outlet. From the liquid to a predetermined destination. When the liquid level of the supply source rises, the resistance fins
And the rotational speed of the cylindrical casing and spiral rod
Deterioration reduces the increase in pumped water, and the liquid level of the source
When ascending, the resistance received by the resistance fins is reduced and cylindrical
The rotation speed of the casing and spiral rod increases,
This will prevent the drop. An embodiment will be described below with reference to the drawings. Reference numeral 1 denotes an upright cylindrical casing, 2 denotes a suction opening which opens in the lower end direction of the cylindrical casing 1, and 3 denotes an outlet which opens in the upper end direction. Reference numeral 4 denotes a resistance fin protruding from the outside of the cylindrical casing 1 and protruding vertically from a lower portion to an upper portion so as to increase a contact area with the liquid as the liquid level of the liquid supply source rises. However, in order to make the effect more remarkable, the side surface may be formed in a wedge shape to increase the protrusion width in the upper portion, or to increase the number of protrusions in the upper portion. Reference numeral 5 denotes a liquid collecting casing, which is fitted to the upper part of the cylindrical casing 1 in a watertight manner via a seal member 6 and rotatably supports the same. Reference numeral 7 denotes a prime mover such as a gear motor installed above the liquid collecting casing 5, and 8 denotes a spiral rod connected to a shaft of the prime mover 7, which is provided with a thread groove on the outer periphery of the rod or the outer periphery of the shaft. The outer edge of the spiral blade contacts the inner periphery of the cylindrical casing 1 to form a spiral pumping passage 9 extending from the inlet 2 to the outlet 3. . Reference numeral 10 denotes a discharge port provided outside the liquid collecting casing 5,
The upper edge 10e is set to be lower than the upper edge 3e of the opening of the outlet 3. For installing the liquid pumping apparatus of the present invention in, for example, a small-sized combined treatment / purification tank, the suction port 2 is opened to the lower part in one tank and the discharge port 10 is moved to the upper part in another tank. When the prime mover 7 is driven in the opened state, the spiral rod 8 rotates together with the cylindrical casing 1. The outer edge of the spiral rod 8 is in contact with the inner peripheral surface of the cylindrical casing 1 and there is no gap unlike a conventional screw pump. Therefore, the undiluted sewage solution in one tank is sucked from the suction port 2 together with impurities. The liquid is pumped from the delivery port 3 into the liquid collecting casing 5 through the spiral pumping path 9 without causing any loss, and is discharged from the discharge port 10 and transferred to another tank for performing the next process such as aeration treatment. Works. Then, as in the present embodiment, if the upper edge 10e of the opening of the discharge port 10 is set to be lower than the upper edge 3e of the opening of the outlet 3, the cylindrical casing 1, the liquid collecting casing 10, Since the liquid does not leak from the fitting portion, the sealing material 6 at this portion can be simplified or omitted. In this type of pumping apparatus, the pumping amount also fluctuates due to fluctuations in the liquid level in one tank, and the pumping amount increases when the liquid level rises and decreases when the liquid level decreases, so that the next step is performed. This is inconvenient when the fixed amount transfer into the tank is required, but if the resistance fin 4 is provided as in this embodiment, the resistance received by the resistance fin 4 increases when the liquid level in one tank rises. As the load on the prime mover 7 increases, the rotational speed of the cylindrical casing 1 and the spiral rod 8 decreases, thereby suppressing an increase in the amount of pumped water. In addition, when the liquid level in one tank decreases, the resistance of the resistance fin 4 decreases. As a result, the load on the prime mover 7 also decreases, and the rotation speed of the cylindrical casing 1 and the spiral rod 8 increases, thereby preventing a decrease in the amount of pumped water, and a fluctuation in the liquid level in one tank occurs. Maintains constant transfer to other tanks for the next process It is. In the pumping device of the present invention, the cylindrical casing 1 is configured to rotate integrally with the spiral rod 8 by driving the prime mover 7, and the outer edge of the spiral rod 8 and the cylindrical casing are rotated. Since there is no gap with the inner peripheral surface of No. 1 and no pumping loss occurs, there is a feature that the pumping capacity is high and the occupied area is small even if the diameter is not large unlike a conventional screw pump. Further, since the spiral rod 8 is cylindrical casing integral structure, resulting et omit journaled device spiral rod 8
Furthermore, the upper edge 10e of the opening of the discharge port 10
3 is set lower than the upper edge 3e of the opening.
Therefore, the fitting between the cylindrical casing 1 and the liquid collecting casing 5
There is no leakage from the joint,
There is an advantage that the structure can be simplified or omitted, and the structure can be simplified and the device can be manufactured at low cost. Also the yen
With resistance fins 4 protruding from the outer periphery of the cylindrical casing 1
Fluctuations in pumping volume due to fluctuations in the liquid level in the tank are automatically corrected.
To maintain the quantitative transfer to the next process.
It is extremely effective for transferring wastewater in a co-treatment tank.
You.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional side view of a main part of a device of the present invention, showing an example in which a spiral rod formed by engraving a thread groove on the outer periphery of a rod is used. FIG. 2 is a longitudinal sectional side view of a main part of the apparatus of the present invention, showing an example in which a spiral rod having a spiral blade protruding from the outer periphery of a shaft is used. DESCRIPTION OF SYMBOLS 1 Cylindrical casing 2 Inlet 3 Outlet 3 e Outlet upper edge 4 Outlet opening 4 Resistance fin 5 Liquid collecting casing 7 Motor 8 Spiral rod 9 Pumping path 10 Discharge port 10 e Discharge port upper edge

Claims (1)

(57) A spiral rod (8) in a cylindrical casing (1) having a lower end opening as a suction port (2) and an upper end opening as an outlet (3).
And the outer edge of the spiral rod (8) abuts against the inner periphery of the cylindrical casing (1), and the spiral liquid passage (9) from the inlet (2) to the outlet (3). ) to form said cylindrical casing (1) to the upper portion and the fitting of the liquid collecting casing (5) outside the discharge port (10) opened by its opening
The edge (10e) is the upper edge (3) of the opening of the outlet (3).
e) is set at a lower position than the discharge port (10).
And the helical pumping path (9) communicates with each other,
A resistance fin (4) protrudes outside the cylindrical casing (1).
Was set, and liquid being pumped device and the prime mover (7) the helical rod by a drive (8) a cylindrical casing (1) is characterized by being configured to rotate with the form.