JPH02199295A - Pump device - Google Patents

Abstract

PURPOSE:To prevent the occurrence of chocking with pebbles in sewage by a method wherein an inner casing is contained in an outer casing provided at its upper part with a suction port and a delivery port, and an impeller extending through the bottom of the inner casing is mounted to the inner casing with a given distance between the outer casing and the impeller. CONSTITUTION:An inner casing 17 is mounted in an outer casing 10, a rotary shaft 18a is mounted to the inner casing 17 in a manner to extend through the bottom part thereof, and an impeller 24 is mounted to the rotary shaft. Thus, a given distance is provided between the impeller 24 and the outer wall of the outer casing 10. Sewage is sucked through a suction port at the lower end of the impeller 24 by means of a suction pipe 15 and is delivered in the outer casing 10 through a guide blade 25b to discharge it through a delivery port 13. This constitution always brings the impeller 24 into a submerged state and provides the size of a gap between the impeller and a surrounding member with a margin, prevents the occurrence of chocking with pebbles in sewage, and prevents lowering of the suction efficiency of the impeller 24 since sucked air immediately produces air bubbles because of a distance between the outer casing 10 and the impeller being wide.

Description

Detailed Description of the Invention (Industrial Field of Application) This invention is intended to remove objects to be sucked, such as sewage and filth containing solids and mud, such as standing water, bottom water, and sediment from which air can easily be drawn. Includes a pump device for sucking and discharging water.

(Prior art and its problems) Conventionally, sewage and filth suction/drainage devices used for discharging spring water and standing water at construction sites, etc.
There are those disclosed in No.-1032 and Utility Model Application Publication No. 57-144289. Both of these devices utilize water ring pumps.

As shown in FIG. 11, the water ring pump is composed of a casing 1 having a cocoon-shaped cross section and a rotor 2 having a large number of blades. Then, a centrifugal force due to the rotation of the rotor 2 is applied to the water replenished into the casing 1 to form oval water 11!3 along the inner surface of the casing 1, thereby,
A cylinder 4 is formed in a space formed between a water film 3 and adjacent blades of a rotor 2. The volume of this cylinder 4 repeats increase and decrease every time the rotor 2 rotates 180 degrees, that is, the volume of the cylinder 4 increases and decreases by the initial 1/4 due to the action of the elliptical shape of the water 1M13.
Rotating! ! It gradually becomes thicker in the surrounding area, and gradually decreases in the next 1/4 rotation range. In this way, suction is performed through the suction port 5 formed corresponding to the cylinder 4, while discharge is performed through the discharge port 6, thereby completing the discharge process.

However, since the conventional sewage/filth suction/drainage device uses a water ring pump, it is necessary to set the gap between the tip of the blade of the rotor 2 and the inner surface of the casing 1 small. For this reason, if pebbles or the like enter the casing 1 from the suction port 5, the pebbles may get caught in the gap between the blades and the casing 1, causing so-called bomb block, where the rotor 2 stops rotating, or the blades and the casing 1 There was a problem that wear and the like occurred. In addition, it is considered that a strainer is placed in front of the suction port 5 to prevent pebbles from getting into the casing 1, but if this is done, the strainer will be clogged by the foreign matter sucked in and the suction performance will be affected. This causes a problem in that the strainer is complicated to clean. Furthermore, casing 1
There was also a problem in that water and air were mixed inside the rotor 2, which caused water draining noises caused by the rotor 2.

On the other hand, in addition to the above-mentioned sewage/filth suction/drainage device, submersible pumps used for water supply work, etc. rotate an impeller housed in a casing in a state where it is constantly submerged in water, and the centrifugal force causes the impeller to rotate. The impeller is configured to draw in water from the center of rotation and discharge it to the outside of the impeller.

Due to the structure of this type of submersible pump, pebbles etc. do not get stuck in the gap between the impeller and the casing, so the pump does not lock or wear out, and since the impeller is submerged in water, it does not generate draining noise. Nor.

However, the area around the impeller is covered with a pump casing so that the water discharged outward from the impeller is smoothly guided to the discharge port. For this reason, when a submersible pump is used to treat sewage and filth, there is a problem in that the air sucked in with the sewage and filth becomes bubbles and accumulates around the impeller, resulting in a significant reduction in suction power.

In addition, pump equipment is generally expected to further increase its suction capacity, and if the operation is stopped during suction processing, the problem of sewage and filth in the suction hose flowing back and flowing out is also avoided. have.

(Objective of the Invention) The first object of the present invention is to provide a pump device that can prevent pump locking and wear, does not generate draining noise, and has excellent suction performance.

A second object of the present invention is to provide a bong 1 device that can suppress the rotational flow generated within the outer casing in order to further increase the suction force, in addition to achieving the first object.

A third object of the present invention is to provide a pump device having an impeller shape that is effective in achieving the first object and further increasing the suction capacity.

A fourth object of the present invention is to provide a pump device that achieves the first object and prevents the object to be sucked in the suction hose from backflowing out even if the operation is stopped during suction and discharge processing. .

A fifth object of the present invention is to provide a pump 0 ivy having excellent cooling performance, especially cooling performance of the driving means, in addition to achieving the first to fourth objects.

The sixth object of the present invention is to prevent abrasion of the bong plotter, to have excellent suction performance, and to obtain a high head, so that even if the operation is stopped during the suction/discharge process, the suction hose and the suctioned material in the pump casing will be maintained. It is an object of the present invention to provide a pump device that does not cause backflow.

A seventh object of the present invention is to achieve an E
It is an object of the present invention to provide a pump device that prevents pump oscillations, abnormal wear, and noise caused by seizure during idle operation, and has excellent cooling performance, particularly cooling performance of a drive means.

(Means for Achieving the Object) In order to achieve the first object, the invention according to claim 1 provides an arrangement in which an inner casing is accommodated in an outer casing provided with an inlet and an outlet in the upper part, and A driving means is housed in an inner casing so that the lower end of the rotating shaft thereof penetrates the bottom of the inner casing, and an impeller is attached to the lower end of the rotating shaft at a predetermined distance from the side wall of the outer casing.
One end of the suction pipe is connected to the suction port marked with #, and the other end is arranged opposite to the lower surface of the impeller, so that the object sucked in from the suction port passes through the suction pipe and the outer casing, and the other end is arranged to face the lower surface of the impeller. It is made to be discharged from the discharge port.

In order to achieve the second object, the invention according to claim 2 provides a plurality of spirals having a spiral direction opposite to the spiral direction of the blades of the impeller on the outer periphery of the impeller in the invention according to claim 1. Guide vanes are placed.

In order to achieve the third object, the invention as set forth in claim 3 provides that the impeller according to claim 1 or 2 is provided on a disk and protrudes from one side of the disk, respectively, and It is constituted by a whirlpool type impeller consisting of a plurality of blades extending in a spiral shape from a position near the center of rotation to the outer periphery.

The invention according to claim 4 is the pump device according to any one of claims 1 to 3, in which, in order to achieve the fourth object, a non-return check is provided at the tip of the suction hose connected to the suction port. A valve is provided.

The invention according to claim 5 is the pump device according to any one of claims 1 to 4, in which, in order to achieve the fifth object, the driving means is moved from the suction port and the discharge port. is also placed at the bottom.

In order to achieve the sixth object, the invention according to claim 6 accommodates an inner casing in an outer casing provided with a first suction port and a first discharge port in an upper part, A driving means is housed so that the lower end of its rotating shaft penetrates the bottom of the inner casing, an impeller having a plurality of radially extending flexible blades is attached to the lower end of the rotating shaft, and a second suction port and a second suction port are provided on the side wall. A pump casing having two discharge ports and a cam for pressing and deforming the flexible vane from the second discharge port to the second suction port is configured such that the impeller is housed in the pump casing. attached to the inner casing, one end of the suction pipe is connected to the first suction port, and the other end is connected to the second suction port,
As the impeller rotates, the flexible blades are sequentially pressed and deformed by the cam in a direction opposite to the rotational direction, and the first The object to be sucked through the suction port passes through the suction pipe, the second suction port, the interior of the pump casing, the second discharge port, and the outer casing, and is discharged from the first discharge port. There is.

The invention according to claim 7 is the pump device according to claim 6, in which, in order to achieve the seventh object, the driving means is located below the first suction port and the first discharge port. It is placed.

(Embodiment) FIG. 1 is a cross-sectional view of a sewage/filth suction/discharge system to which a pump device according to a first embodiment of the present invention is applied, and FIG. 2 is a top view of the device. As shown in both figures, in the outer casing 10, moving wheels 11 and casters 12 are attached to the lower end of a box body 10a having a substantially U-shaped longitudinal section, and a casing cover 14 is attached to the upper opening thereof. The casing cover 14 has a discharge port 13 formed on its negative side, and a suction hole 15 that communicates the inside of the outer casing 10 with the outside on the other side, and faces the inner end of the suction hole 15. The suction pipe 16 is connected in this manner. Further, at the center of the lower end of the casing cover 14, a longitudinal section approximately U
The upper end of the inner casing 17 is attached. Inside the inner casing 17, the motor 18 has its rotating shaft 18a.
is arranged in the vertical direction, and its rotation axis 18a
The lower part of the inner casing 17 is housed so as to pass through the bottom of the inner casing 17. Moreover, on the upper part of the casing cover 14,
motor cover 19; drive switch 20° outlet 21 disposed on the top surface of motor cover 19, respectively; A handle 22 is installed and the motor 18 is configured to rotate when the drive switch 20 is turned on with the outlet 21 connected to an external power source.

The lower surface of the inner casing 17 has three
stud bolts 30 (only one shown in FIG. 1) are installed. The seal bracket 23 is disposed on the lower surface side of the inner casing 17 so that the lower end of the rotary shaft 18a of the rotor 18 is passed through the central portion of the seal bracket 23 in a sealed manner, and is secured to the embedded bolt 30 with a nut. As a result, an rIIW4 oil chamber 27 is formed between the upper surface of the seal bracket 23 and the lower surface of the inner casing 17, and the lubricating oil chamber 27 is formed between the upper surface of the seal bracket 23 and the lower surface of the inner casing 17.
An oil plug 32 is screwed into an oil introduction hole that communicates between the outer casing 7 and the inside of the outer casing 10.

Figure 3 shows a cross-sectional view taken along line 1 in Figure 1. As shown in FIGS. 1 and 3, the impeller 24 attached to the rotating shaft 18a of the motor 18 is provided with a disk 24a, and is provided protrudingly on one side of the disk 24a, and is formed in a whirlpool shape. It consists of a plurality of blades 24b. Impeller 2 to rotating shaft 18a
4 is installed by fitting the boss of the impeller 24 into the lower end of the rotating shaft 18a via the parallel key 28, and fastening a nut 29 to a threaded portion (not shown) provided on the rotating shaft 18a.

As shown in FIG. 3, the rotational flow prevention part 25 provided on the outer periphery of the impeller 24 includes a ring plate 25a in which three bolt through holes 25c are formed, and a spiral direction on one side of the ring plate 25a. It consists of a plurality of guide vanes 25b that protrude in a direction opposite to the spiral direction of the impeller 24. Also, the first
The bottom plate 2 is arranged below the guide vane 25 as shown in the figure.
6 consists of a 0-shaped vibrator 26a and a 7 flange 26b connected to the outer periphery of one end of the 1-shaped pipe 26a. To install the guide vane 25 and the bottom plate 26, the embedded bolts 30 are passed through the three bolt through holes 25c and the flange 26b of the guide vane 25, and the three nuts 33 are fastened, and the rotational flow While the prevention portion 25 is held under pressure between the bottom plate 26 and the seal bracket 23, the ( )-shaped pipe 2
6a no ll! This is done by connecting the F end of the suction pipe 16 to the end with a bolt 34.

On the other hand, a suction hose 40 is connected to the outer end of the suction hole 15 of the casing cover 14, and a check valve 41 is attached to the tip of the suction hose 40.

FIG. 4 shows a sectional view of the check valve 41. As shown in the figure, at the tip of the cylindrical hole of the approximately cylindrical main body 42! ! The valve 43 to be inserted Q4 is provided with an attachment part 43a, and the bolt 46 is fastened with the bottle 44 of the ring-shaped stand 45 passing through the attachment part 43a, so that the valve 43 is attached.

Furthermore, an element 47 is mounted on the stand 45 to form a ring spring 4.
Attached by 8. As shown in FIG. 5, the element 47 has a plurality of through holes 47a formed therein, and when suction is started by this device A as will be described later, the valve 43 is deflected by the deflection/υ (fourth The amount of sewage and filth constituting the suction object (shown in the imaginary line in the figure) is excessive 47a.

While the suction hose 40 is guided through the ring hole of the stand 45 and the same size of the main body 42, when the suction is stopped, the valve 43 returns to its natural state as shown by the solid line in the figure, and the stand 45 The ring hole is opened to prevent the sewage and dirt inside the suction hose 40 from flowing back out.

Next, the suction and discharge processing by this sewage/filth suction and discharge device HA will be explained. Before driving the motor 18, about half of the water is stored in the outer casing 10 in advance.

When the motor 18 is driven in this state, the impeller 24 rotates in the counterclockwise direction in FIG. The lower side is depressurized. Due to this reduced pressure, sewage and filth (hereinafter referred to as "sewage") is sucked into the suction hose 40 from the tip of the suction hose 40, and the suction hole 15. It passes through the suction pipe 16 and the pipe portion 26a and is sucked into the periphery of the impeller 24. Furthermore, it is pushed out to the side of the blade 1124 by the centrifugal force, passes between the plurality of guide blades 24b, and is pushed into the outer casing 10. When this operation is repeated continuously and more than a predetermined depth of wastewater accumulates inside the outer casing 10,
Dirty water is discharged from the discharge port 13.

According to this sewage/filth suction/exhaust device, since it has a submersible pump structure in which the impeller 24 is always submerged, there is ample space between the impeller 24 and its surrounding members, such as the guide vanes 25b and the bottom plate 26. can be set. therefore,
This prevents pebbles from getting stuck in the gap, preventing pump lock and wear. Furthermore, since the distance between the outer circumference of the impeller 24 and the inner surface of the outer casing 10 is set large, even if air is sucked in through the suction hose 40,
The air immediately becomes bubbles and diffuses from between the guide vane 25b and the outer casing 10 onto the water surface. therefore,
Air bubbles do not accumulate around the impeller 24, and the suction force does not decrease. Furthermore, a guide vane 2 is provided on the outer periphery of the vane rR24.
4b, the rotational flow generated by the rotation of the impeller 24 is suppressed by the guide vanes 25b, so that almost no rotational flow occurs inside the outer casing 10, and air bubbles around the impeller 24 are more effectively eliminated. It can be dispersed to provide stronger suction power.

Further, since the check valve 41 is provided at the tip of the suction hose 40, even if the operation is stopped during suction, the dirty water in the suction hose 40 will not flow out from the tip of the suction hose 40. Furthermore, since the motor 18 is arranged below the suction port 15 and the discharge port 13, the motor 18
The inner casing 17 in which the
It is absorbed by the sewage inside the tank and cools u1 without causing abnormalities due to heat.
It also has excellent performance.

FIG. 6 is a cross-sectional view of a main part showing a sewage/filth suction/drainage device B to which a pump device according to a second embodiment of the present invention is applied;
The figure is a sectional view taken along the line Vl--Vl in FIG. 6. As shown in both figures, this equipment ff1B is different from the sewage/filth suction/drainage device A shown in Figs. car 124
The only point is that it uses . This whirlpool type impeller 124 has a large number of blades 124b protruding from one side of a disk 124a, each spirally extending from the center of rotation to the outer end. The distance is set smaller than the distance between the blades 24b@, and a space 50 is formed between the whirlpool impeller 124 and the bottom plate 26. The rest of the configuration is the same as the sewage/filth suction/drainage system [A] shown in Figures 1 to 5 above.
Identical parts are given the same reference numerals and their explanations will be omitted.

According to this sewage/filth suction/exhaust device MB, the whirlpool type impeller 12
Since a space 50 is provided between 4 and the bottom plate 26,
When the whirlpool impeller 124 rotates, the space 50
A vortex is generated at the position, and in addition to the centrifugal force of the vortex type impeller 124, a suction effect due to the vortex is added, thereby further increasing the suction ability.

For example, when comparing the suction force of this sewage and filth suction device B with that of the sewage and filth suction device B, as shown in Fig. 8,
The degree of vacuum at the lower position of the impeller 124 of this sewage and filth suction/drainage device MB is always higher than the vacuum degree at the lower position of the impeller 24 to the sewage and filth suction/drainage device. It can be seen that the suction power of B is very high.

FIG. 9 is a cross-sectional view of main parts showing a sewage/filth suction/drainage device C to which a pump device according to a third embodiment of the present invention is applied;
FIG. 0 is a sectional view taken along the line X--X in FIG. 9. As shown in both figures, in this sewage/filth suction/drainage device C, its impeller 224
The surrounding structure is different from that of the sewage/filth suction/drainage devices A and B shown in FIGS. 1 to 8 above.

That is, the impeller 2 attached to the lower end of the rotating shaft 18a
24 is made of synthetic rubber or the like and includes a plurality of radially extending flexible wings 224b. In addition, the impeller 22
The side wall 2 of the pump casing 300 provided on the outer periphery of the pump casing 300
25, three bolt through holes 225C are formed, and a suction port 225a and a discharge port 225b are formed in the side wall 25, and a discharge port 225 on the inner circumferential surface of the side wall 225
b to suction port 225a1. At step II, a cam 301 is attached to press and deform the blade 224b. Then, the embedded bolts 30 are attached to the side wall 225 so that the tips of the blades 224b are in contact with the inner peripheral surface of the side wall 225.
The three nuts 33 are fastened by passing the bolts through the bottom plate 26 and through the bolt holes 225C, respectively. Here, the pump casing 300 includes a side wall 225 and a bottom plate 26. Further, the lower end of the suction pipe 16 is connected to the suction port 225a of the side wall 225, and the upper end of the suction pipe 16 is connected to the inner end of a suction hole (not shown) of the outer casing 10. Although not shown, a check valve is not attached to the tip of the suction hose connected to the outer end of the suction hole of the outer casing 10. Other configurations are as described in the first section above.
This is the same as the sewage/filth intake/discharge devices MA and B shown in FIGS.

In this sewage/filth suction/exhaust device MC, when the impeller 224 is rotated counterclockwise in FIG.
01, the blades 224b are sequentially pushed and bent clockwise in the figure. As a result, the volume of the space surrounded by the pair of adjacent blades 224b and the inside of the pump casing 300 is
As the impeller 224 rotates, the internal pressure of the space decreases when it passes through the discharge port 225b, and the internal pressure of the space increases, and the sewage in the space is discharged from the discharge port 225b. The internal pressure of the space decreases and the suction pipe 1
The dirty water in the tank 6 is sucked into the space through the suction port 225a.

In this way, as the impeller 224 rotates, the suction and discharge operation of the sewage is repeated, and the sewage is sucked in from the suction hose (not shown) and flows through the suction hole (not shown) and the suction pipe 16. Suction port 22
5a.

It passes through the inside of the pump casing 300 and the discharge port 225b, and is pushed out into the outer casing 10.
It is discharged from a discharge port (not shown) formed at the top of the .

According to this sewage/filth suction/drainage device C, the flexible blade 224
Since the configuration is such that the suction/exhaust operation is performed using the pressure change accompanying the volume change of the space between
The self-sufficiency is higher than using the impeller 24.124 used in the sewage/filth suction/exhaust device δA, 8 of the embodiment, and the suction performance is excellent and an island lift can be obtained. Further, the impeller 24.
Since the dimension between the blades 224b can be ensured larger than that of the blades 124, it is possible to suck and discharge considerably large foreign objects. Further, since the blades 224b are flexible, the blades 224b are deformed as necessary, so the impeller 224 will not be locked even if foreign matter gets mixed in, and abnormal wear can be prevented. Further, an impeller 224, a pump casing 300
Since the motor section (not shown) is always submerged in water, seizure and abrasion of the impeller and generation of draining noise are prevented, and overheating of the motor is also prevented. Furthermore, even if the operation is stopped during the suction/discharge process, the suction port 225a and the discharge port 225b of the pump casing 300 are blocked by the vane 224b, so that the sewage in the suction hose will not flow out from the tip of the suction hose. Nor.

(Effect of the invention) According to the pump device according to claim 1, since it is configured to utilize a submersible pump structure in which the distance between the impeller and the outer casing is set large, the Air bubbles do not accumulate around the impeller, but instead pass between the impeller and the outer casing and are immediately dispersed onto the water surface, improving suction performance without reducing suction power. The first effect is that locking and abrasion are prevented, and water draining noise is also not generated.

According to the pump device according to claim 2, since the guide vanes are provided on the outer periphery of the impeller, in addition to the above-mentioned first effect, the rotational flow generated by the rotation of the impeller can be suppressed, and the suction capacity can be increased. A second effect of improving the performance can be obtained.

According to the pump device according to claim 3, since the whirlpool type impeller is used, in addition to the above first effect, a whirlpool is generated below the whirlpool type impeller, and the whirlpool flow is generated along with the centrifugal force of the whirlpool type impeller. A third effect is obtained in which the suction effect is added and the suction performance is further improved.

According to the pump device according to claim 4, since the check valve is provided at the tip of the suction hose, in addition to the above first effect,
@Even if the operation is stopped during the process, the fourth effect is that the suction object in the suction hose does not flow out.

According to the pump device according to claim 5, since the driving means is disposed below the suction port and the discharge port, the first
In addition to the fourth effect, the area around the drive means is covered with water or other objects to be attracted, and the heat of the drive means is absorbed by the water, which improves the cooling performance, especially the cooling performance of the drive means. A fifth effect of superior performance can be obtained.

According to the pump device according to claim 6, since the pump device is configured to perform the suction/discharge operation by utilizing the pressure change accompanying the change in volume of the space between the flexible vanes, pump locking and wear can be prevented, and the suction The sixth effect is that the performance is excellent, the high head is reduced to 1q, and even if the operation is stopped during the suction/discharge process, the suctioned material in the suction hose and pump casing will not flow back out.

According to the pump device according to claim 7, it is possible to prevent the pump from locking due to seizure during idle operation, abnormal wear, and noise, and because the driving means is arranged below the first suction port and the first discharge port. In addition to the sixth effect mentioned above, the area around the driving means is covered with objects to be attracted, such as water, and the heat of the driving means is absorbed by the water, so the cooling performance, especially the cooling performance of the driving means, is improved. The seventh effect of being superior can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a pump device according to a first embodiment of the present invention, Fig. 2 is a top view of the device, Fig. 3 is a sectional view taken along line 11 in Fig. 1, and Fig. 4 is a non-return check. 5 is a sectional view showing the valve, FIG. 5 is a plan view showing the elements of the check valve, FIG. Fig. 8 is a vacuum performance comparison graph for comparing the suction forces of the devices according to the first and 24th embodiments of the present invention, and Fig. 9 is a sectional view taken along the line ■-Vl of the present invention. Main part sectional view showing an example pump device, 1st
FIG. 0 is a sectional view taken along the line XX of FIG. 9, and FIG. 11 is a diagram for explaining the principle of a conventional pump device. 10...Outer casing, 13...Discharge port, 15
... Suction hole (suction port), 16... Suction pipe, 17...
・Inner casing, 18...Motor, 18a...
Rotating shaft, 24... Impeller, 25b... Guide vane, 40... Suction hose, 41... Check valve, 124... Whirlpool blade width, 124a... Disc,
124b... impeller, 224... impeller,
224b...Flexible vane, 225a...(2nd) suction port, 225b...(2nd) discharge port, 300...Pump casing, 301...Cam, A
, B, C... Sewage/filth absorption device

Claims (7)

[Claims] (1) An inner casing is housed in an outer casing provided with a suction port and a discharge port at the top, and a drive means is housed in the inner casing so that the lower end of its rotating shaft passes through the bottom of the inner casing. , an impeller is attached to the lower end of the rotating shaft at a predetermined distance from the side wall of the outer casing, one end of the suction pipe is connected to the suction port, and the other end is arranged opposite to the lower surface of the impeller, A pump device characterized in that an object to be sucked sucked through the suction port passes through the suction pipe and the outer casing and is discharged from the discharge port. (2) The pump device according to claim 1, wherein a plurality of guide vanes having a spiral direction opposite to the spiral direction of the blades of the impeller are arranged on the outer periphery of the impeller. (3) The impeller is a whirlpool impeller consisting of a disc and a plurality of blades each protruding from one side of the disc and extending spirally from a position near the center of rotation toward the outer periphery. The pump device according to claim 1 or 2, configured by: (4) The pump device according to any one of claims 1 to 3, further comprising a check valve provided at the tip of the suction hose connected to the suction port. (5) The pump device according to any one of claims 1 to 4, wherein the driving means is arranged below the suction port and the discharge port. (6) An inner casing is housed in an outer casing having a first suction port and a first discharge port at the top thereof, and a drive means is provided in the inner casing, with the lower end of its rotating shaft passing through the bottom of the inner casing. An impeller having a plurality of flexible blades extending radially is attached to the lower end of the rotating shaft, and has a second suction port and a second discharge port on the side wall, and the second
A pump casing having a cam for pressing and deforming the flexible vanes from the discharge port to the second suction port is attached to the inner casing so that the impeller is housed in the pump casing, and one end to the first
The flexible blade is connected to the suction port and the other end is connected to the second suction port, and as the impeller rotates, the flexible blade is sequentially pressed and deformed in a direction opposite to the rotational direction by the cam. Utilizing the pressure change accompanying the change in volume of the space between the blades, the object to be sucked is sucked from the first suction port into the suction pipe, the second suction port, the inside of the pump casing, and the second suction port.
A pump device characterized in that the pump is discharged from the first discharge port through the discharge port and the inside of the outer casing. (7) The driving means includes the first suction port and the first suction port.
The pump device according to claim 6, wherein the pump device is arranged below the discharge port.