JPS60247086A - Mud suction pump - Google Patents

Abstract

PURPOSE:To discharge mud at the bottom of the water by providing an umbrella cover below the casing then pumping muddy water through an impeller journaled in the casing and branching a portion of said muddy water downward as spiral flow. CONSTITUTION:In a mud suction pump 1B, the outercircumference of a sideboard 8c of an enclosed impeller 8 journaled in the casing 2 while having the innercircumferential end projected downward is made concave to have small diameter in the proximity of the front sideboard 8c while large diameter at the lower end, then a sufficient water path 9 is provided between the inner diameter of the suction cover section 5 facing against the lower section of impeller 8, while a gradually enlarging umbrella cover 6 is fixed below the suction cover 5 and a delivery port 7 is made at one side of casing 2. Consequently, spiral water flow is led through the water path 9 to the inner face of said cover 6 and flows down while performing spiral motion. The water discharged from the umbrella cover 6 is sucked by the impeller 8 while describing a rotary flow locus and mixing with solid matters at the bottom of water then discharged effectively through the delivery port 7.

Description

DETAILED DESCRIPTION OF THE INVENTION The invention of the present application is connected to a suction pump that removes solid matter deposited on the bottom of water. Sludge pumps currently in use, such as submersible pumps and vertical shaft pumps, are designed to have various types of impellers attached below the pump suction port to agitate and suck up accumulated solids, or are designed to use pressurized water to Since the structure is such that the jet water directly excavates and suspends mud and removes it by suction, the mud absorption area becomes narrower when the water is jetted in a straight line, and the mud is often scattered outward. In addition, the impeller system has a number of drawbacks, such as a complicated structure, easy failure, consumption of a large amount of power, and poor mud suction efficiency.

The invention of the present application has been made in order to eliminate such drawbacks, and its gist is that an impeller is pivotally supported within a casing, the inner circumferential end of the main wing of the impeller projects below the casing, and the main wing protrudes. A mud suction pump comprising an umbrella-shaped cover attached to the lower surface of the casing so as to surround the outer periphery of the casing.

2. The mud suction pump according to claim 1, wherein the impeller is a semi-open impeller or a closed impeller.

3. A closed type impeller is pivotally supported in the casing, and the inner circumferential end of the front side plate of the impeller protrudes from the casing, and the outer circumferential corner of this protruding portion is opposite to the lower part of the impeller. This mud suction pump has a water passage between the cover and the suction cover, an umbrella-shaped cover is attached below the suction cover, and blades are connected below the impeller.

4. An impeller is pivotally supported within the casing, a suction cover is disposed below the impeller, the outer peripheral edge of the suction cover is connected to the casing, and the suction cover is placed in the circumferential direction at a location facing the impeller. This mud suction pump consists of a long, radially narrow oblique hole, and an umbrella-shaped cover attached below the outside of this oblique oblong hole.

5. The suction pump according to claim 4, wherein the impeller is a closed impeller or a semi-open impeller.

6. A mud suction system in which an impeller is pivotally supported in the upper corner chamber of the casing forming a two-stage vortex chamber, the lower surface of the lower front chamber is largely opened, and an umbrella-shaped cover is provided below the opening. pump.

The invention of the present application will now be described in detail based on examples.

<Example 1> The suction pump IA shown in FIG. 1 has a semi-open impeller 3 supported in a casing 2, and the inner peripheral end of the main blade 3a of the impeller 3 protrudes downward to form a discharge blade section. 3b and the discharge wing part 3b
An umbrella-shaped cover 6 is attached which protrudes below the suction port 4 and gradually expands downward from the suction cover part 5 located on the outer periphery of the discharge wing portion 3b, and a discharge lower is attached to one side of the casing 2. It will be set up.

In the mud suction pump IA shown in FIG. It descends while moving, is released from the inner lower end 6b of the umbrella-shaped cover 6, spreads downward and outward, mixes with surrounding water, and attenuates. On the other hand, the required amount of pumped water W1 is discharged from the inside of the main wing 2a to the discharge lower, but the suction force of the impeller 3 generated at this time acts on the muddy water near the surface of the solid matter M deposited on the bottom of the water, causing an upward flow W2. The flowing water W3 is decelerated most on the surface of the solid matter M discharged downward from the umbrella-shaped cover 6 to form
is influenced by the upward flow W2, which mixes and accelerates the surrounding water, changes to an inward swirling flow, reduces the swirling radius, increases the circumferential speed, and the upward flow W2 in the center forms a strong swirling upward flow, and the blade It is sucked into car 3. In this way, the pumped water W1 of the impeller 3 flows from the outer mud surface where the flowing water W3 has been decelerated the most, while being mixed and accelerated, going around the surface of the solid matter M on the water bottom, and flowing into the solid matter M on the water bottom. Depending on the speed, M is accumulated in the center while sliding, jumping, or completely floating, sucked into the impeller 3, and discharged from the discharge lower. Incidentally, FIG. 2 is a front view of the impeller 3 shown in FIG. 1.

<Embodiment 2> The mud suction pump IB shown in FIG. 3 has a closed type impeller 8 pivotally supported in the casing 2, and a side plate 8e with the inner peripheral end of the front side plate 8c of the impeller 8 protruding downward. The outer part has a small diameter near the front side plate and a large concave shape at the lower end, and the impeller 8
A sufficient passageway 9 is provided between the inner diameter of the suction cover part 5 facing downwardly, and an umbrella-shaped cover 6 is attached which gradually expands downward from the suction cover 5. A discharge lower is provided. In addition, 10
is the main wing of the impeller 8 and forms a flow path inside.

In this mud suction pump 18, the pumped water W1 is sucked into the flow path 10 of the impeller 8 as shown by the arrow. The amount of backflow water and swirling flow velocity are adjusted by the outer diameter, inner diameter, width, and airfoil shape of the front surface material 8b, and the flowing water having the swirling flow is passed through the passageway 9. It is guided from the inside of the umbrella-shaped cover 6 and allowed to flow down while making a spiral movement.

The flowing water discharged from the umbrella-shaped cover 6 is sucked into the impeller 8 and discharged from the discharge lower while forming a circulation locus similar to that in the first embodiment and mixing solid matter at the bottom of the water. Incidentally, FIG. 4 is a plan view of the impeller 8.

<Embodiment 3> The t-sludge suction pump IC shown in FIGS. 5 and 6 has a closed type impeller or a semi-open type impeller 11 pivotally supported in a casing 2, and a central cylindrical opening of a suction cover 5. The portion 5a is fitted into the suction port 11a of the impeller 11, and a portion of the suction cover 5 facing the impeller 11 is provided with a circumferentially long portion.
A slanted elongated hole 12 as shown in FIG. 7 that is narrow in the radial direction.
A required number of molds are opened, and an umbrella-shaped cover 6 is attached below the outside of the elongated hole 12.A discharge lower is provided on one side of the casing 2, and a rectifying plate 13 is attached inside the suction cover 5.

In this mud suction pump 1c, pumped water w1 is sucked into the impeller 11 through the suction cover 5 as shown by the chain line,
Some of the pumped water and water flowing in from the gap between the inner periphery of the front side plate 11C of the impeller 11 and the suction cover 3 are injected through the elongated hole 12 along the inner peripheral wall of the umbrella-shaped cover 6. , the swirling flow is discharged downward as shown by the solid line to act on the solid matter M at the bottom of the water, forming a circular flow trajectory similar to that in Example 1, and mixing the solid matter M at the bottom of the water well with the water. It is sucked into the impeller 11. In addition, in Figure 8, the impeller 11
FIG.

<Example 4> The suction pump 1o shown in FIGS. 9 and 10 is a non-blocking suction pump, and the casing 2 has a two-stage vortex chamber.
The impeller 14 is pivotally supported in the upper vortex chamber, and the lower vortex chamber is connected to the front chamber 2a.
A suction port 15 is provided at the lower part of the front chamber 2a, an opening on one side is communicated with the discharge lower, and a 1ζ umbrella-shaped cover 6 is attached downward from the suction port 15.

In the suction pump 10, pumped water w1 rises from below the umbrella-shaped cover 6 while forming a swirling flow as shown by the chain line, and reaches a large circumferential velocity in the casing 2 as shown by the solid line. It becomes a swirling flow with a certain amount of energy and is discharged from the discharge lower. On the other hand, by widening the suction port 15 provided at the lower part of the front chamber 2a of the casing 2, the swirling flow on the inner circumference of the front chamber 2a is sucked into the inner wall 6a of the umbrella-shaped cover 6 from the inner side surface of the front chamber 2a. The solids M at the bottom of the water are thoroughly mixed with water while being discharged downward from the umbrella-shaped cover 6 as a swirling flow, and the solids M at the bottom of the water are thoroughly mixed with water, and the mixture is sucked into the impeller 14 and discharged from the discharge lower. Make it more discharged.

<Example 5> The suction pump 1E shown in FIGS. 11 and 12 has a semi-open blade RL3' pivotally supported in the casing 2, and the front inner circumferential end 3'b of the blade protrudes downward. The suction port 4' of the impeller 3' protrudes from the top of the umbrella-shaped cover 6, and the casing 2
A discharge lower is provided on one side of the i! The swirling flow is pumped up at 2a and released outward at the front inner peripheral end 3'b of the wing, descends along the inner peripheral wall 6a of the umbrella-shaped cover 6, and is released into the water at the lower end. The solid matter at the bottom of the water is mixed well with the water while forming the same circulating trajectory as in Example 1, and the impeller 3
' is discharged from the suction port 4' to the discharge lower.

<Embodiment 6> The suction pump 1" shown in FIG. 13 and 141i1+ has a closed type impeller 16 pivotally supported in the casing 2, and a front surface plate 16b is provided on the rear lower front surface 16c of the suction side of the impeller 16. A part of the front surface 16b is extended and protruded downward, and an umbrella-shaped cover 6 is attached to the lower front surface of the impeller 16 and below the suction cover 3 which is integrally formed with the casing 2. A discharge lower is provided on one side of 2.

In the mud suction pump 1F, part of the pumped water is turned into downward swirling flowing water by the protrusion 16d of the front surface 16b of the impeller 16, and this flowing water is caused to flow downward along the umbrella-shaped cover 6. The pumped water is discharged from the lower end of the umbrella-shaped cover 6 and sucked into the impeller 16 to generate a powerful swirling flow to sufficiently mix the mud on the bottom of the water with water, which is sucked by the impeller and discharged from the discharge port.

Next, the impellers used in the mud suction pumps 1^~IF will be explained. Impellers 3.3', 8, 11°14, 1
6 has an inner end inlet blade angle of the swirling flow generation vane that is approximately a right angle, and an outlet end blade angle of 100 degrees or more, which is curved in the direction of rotation, so that the pumped water to be sucked generates a swirling flow, and the impeller. The suction inflow tip angle of the main wing is almost perpendicular, and the main wing mouth tip angle is 45 degrees or less, and the airfoil is curved to the rear of the rotation.The swirling flow generating blade has maximum energy or a large jet speed. It is formed to efficiently generate circulating flow.

The mud suction pump of the present invention is constructed as shown in J above, and includes various impellers 3, 3', 8, 11°, 14, 1.
6 etc. is rotated to suck the pumped water W1 from the suction port of the impeller, and a part of this pumped water W1 is sent to the protruding parts 3b, 3' of the main wing.
b, 16b Elongated hole 12 for attaching weight to the suction cover 5 of the wing chamber
, through the water passage 9 provided between the suction cover 5 and the front side plates 8e of the impeller 8, and the suction port of the front chamber 2a of the impeller 14, so as to be connected to the lower part of the casing 2 by turning it. The umbrella-shaped cover 6 is lowered in a spiral manner along the inner surface 6a, and is discharged into the open water from the inner lower end 6b of the umbrella-shaped cover 6, spreading downward and outward while mixing with the surrounding water and solids on the bottom of the water. Circulate around the surface of M.

On the other hand, the main pumped water of the impeller is discharged from the discharge lower,
This pumping of water is accompanied by a strong suction force that forms a swirling flow, which is at its maximum right below the suction port, and this suction force acts on the water circulating on the surface of the solid matter M at the bottom of the water. The outward circulating water is mixed and accelerated so as to be pulled directly below the suction port, turning it into an inward swirling flow, increasing the circumferential speed while reducing the swirling radius and forming a strong upward flow in the center of the impeller. Further, a part of the pumped water is turned again to the umbrella-shaped cover 6, and as described above, circulates on the surface of the solid matter M at the bottom of the water, becoming an upward flow and being sucked into the impeller. Due to the action of such circulation, solid matter on the bottom of the water slides, jumps, or completely floats, mixes with the upward flow, and is discharged from the impeller to the discharge lower.

As described above, according to the present invention, an umbrella-shaped cover is provided below the casing, an impeller is pivotally supported within the casing, and a part of the muddy water sucked and pumped by the impeller is converted into a downward swirling flow. The pump is designed to separate the flow, and is designed to effectively discharge mud, earth, and sand that accumulates on the bottom of the water through the synergistic effect of the suction force of the pumped water and the downward swirling flow, so it does not work as well as the previous mud suction pump. There is no need to take injected water (and less power is required, and the pump structure is simple and less likely to break down, and the mud suction area is widened, which significantly improves mud suction efficiency, etc., and can increase practical effects. It is something.

[Brief explanation of the drawing]

Figure 1, Figure 3, Figure 5, Figure 6, Figure 9, Figure 11,
Fig. 13 is a sectional view showing the main parts of the mud suction pump of the present invention, Fig. 2, Fig. 4, Fig. 8, Fig. 10, Fig. 12,
FIG. 14 shows mud suction pumps IA, 1B, and
A plan view of the impellers of IC, 10, IE, and IF, and FIG. 7 is a sectional view taken along the line II in FIG. 6. In the figure: 2: Casing 3.3': Semi-open impeller 5: Suction cover 6: Umbrella-shaped cover 7: Discharge section 8: Closed impeller 9: Water passage 11: Closed impeller 12: Suction cover 5 Elongated hole 13: Current plate 14; Closed type impeller IA, 'IB, IC. ID, IE, IF': Mud suction pump patent applicant Benjo Toraoyo Osamu Ariyoshi Kyoto Figure 73 to Figure 74

Claims (1)

[Claims] 1. An impeller is pivotally supported within a casing, the inner peripheral end of the main wing of the impeller projects below the casing, and the lower surface of the casing surrounds the outer periphery of the protruding portion of the main wing. A mud suction pump with an umbrella-shaped cover attached to it. 2. The mud suction pump according to claim 1, wherein the impeller is comprised of a semi-open impeller or a closed impeller. 3. A closed type impeller is pivotally supported in the casing, and the inner circumferential end of the front side plate of the impeller protrudes from the casing, and the outer circumferential corner of this protrusion and a suction cover are provided oppositely below the impeller. A mud suction pump has a water passage between the suction cover, an umbrella-shaped cover is attached below the suction cover, and a front blade is connected below the impeller. 4. An impeller is pivotally supported within the casing, a suction cover is disposed below the impeller, the outer peripheral edge of the suction cover is connected to the casing, and the suction cover is placed in the circumferential direction at a location facing the impeller. This mud suction pump consists of a long, radially narrow oblique hole, and an umbrella-shaped cover attached below the outside of this oblique oblong hole. 5. The mud suction pump according to claim 4, wherein the impeller is comprised of a closed impeller or a semi-open impeller. 6. A mud suction system in which an impeller is pivotally supported in the upper vortex chamber of the casing forming a two-stage vortex chamber, the lower surface of the lower front chamber is largely opened, and an umbrella-shaped cover is provided below the opening. pump.