JPH0615024B2 - Stirrer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is used in a stirring tank, in which the impeller shaft axis is in the vertical direction, and the liquid in the tank is sucked in from above or below the impeller, and below or above. With respect to the stirring device that is returned to the tank from the above, it is used not only as a normal stirring device, but also as an aeration device by injecting an oxygen-containing gas into the upstream or downstream flow path in the impeller, for example. It

(Prior Art) A conventional agitator of this type used as an aerator is an underwater motor or an underwater geared motor (hereinafter simply referred to as an underwater motor) having a reduction gear mechanism built in a motor chamber as shown in FIG. An impeller 2 of a vertical (vertical axis) submersible motor pump driven by a shaft 1 is attached to a lower end of a rotary shaft 3 supported by a bearing in the motor.
Is mechanically sealed by a mechanical seal 4. Also,
The casing is separated into an upper casing 5 that expands upward and a lower casing 6 that expands downward in a bellmouth shape, and are joined by a flange 7. A frusto-conical or chevron-shaped air chamber partition wall 9 having a top portion close to the impeller boss portion 2a and a lower peripheral surface provided with an injection port 8 is mounted inside the lower casing 6. A supply conduit 10 for oxygen-containing gas such as air is attached to the bottom plate 9a.

The submersible motor 1 is provided with a flange 1a on the inner side of a rib 5a which is also formed integrally with the upper casing 5 and also serves as a current plate.
The upper and lower casings 5 and 6, the air chamber partition wall 9 and the air supply conduit 10 are installed on the bottom surface of the stirring tank including an aeration tank (not shown).

During operation, when the submersible motor 1 is driven, the impeller 2 rotates, and the liquid in the tank is sucked from above in the direction of the arrow through the rib 5a also serving as the flow straightening plate, and the lower discharge port 6 of the lower casing 6 is discharged.
It is discharged again from a. Therefore, the liquid in the tank is agitated. Also, when using it as an aerator, supply air
Oxygen-containing gas is supplied from 10 and is injected from the injection port 8 into the liquid to be treated which passes through the flow path formed between the lower casing 6 and the air chamber partition wall 9 and is discharged into the aeration tank. In this way, the liquid to be treated in the aeration tank is mixed with oxygen in the oxygen-containing gas and fermented and decomposed.

(Problems to be Solved by the Invention) In the agitation device installed in the agitation tank as described above, when disassembling the mechanical seal 4 which is most easily damaged during use, for example, for inspection of the mechanical seal 4, the casing is replaced with the upper casing 5. Separated into lower casing 6 and upper casing 5
After lifting up together with the rotor part attached, the impeller 2 in the upper casing 5 had to be pulled out to the opposite side of the submersible motor 1, that is, downward, which made workability poor. Further, even when assembled, the upper casing 5
The motor shaft 3 had to be fitted inside the boss hole of the impeller 2 inside, and there was a problem that the workability was poor as in the case of disassembly.

(Means for Solving Problems) In order to solve the above-mentioned problems of the prior art,
A first aspect of the invention is an agitator used in a stirring tank, in which the impeller shaft axis is vertical and the liquid in the tank is sucked in from one of the impellers and discharged from the other, and the impeller is of an axial flow type. The rotary body portion formed of the axial flow type impeller and the submersible motor that is a driving machine thereof constitutes a part of the casing detachable from the casing body and sucks from above and discharges downward. Via the ribs that also function as a plurality of straightening vanes attached to the upper suction side of the impeller,
Attached to the casing body, and at the time of overhaul and inspection, the rotor part including the impeller can be taken out as it is from the casing body together with the ribs that also function as a plurality of straightening plates that form a part of the casing. Is characterized by.

A second aspect of the invention is a stirring device used in a stirring tank, wherein the impeller shaft core is in the vertical direction, and the liquid in the tank is sucked in from one of the impellers and discharged from the other, and the impeller is a shaft. The rotor part is formed in a flow shape and constitutes a part of the casing that is detachable from the casing body, and the suction part is formed from the lower part of the rotor part that is composed of the axial flow type impeller and the submersible motor that is its drive unit. Attached to the casing main body through an upper inner casing that is attached to the upper discharge side of the impeller and is positioned diagonally upward with the outer radial direction and is located at a sufficient distance from the impeller. It is characterized in that the rotating body portion including the above can be taken out from the casing main body as it is together with the upper inside casing forming a part of the casing.

(Operation) According to the present invention configured as described above, the first invention provides an impeller having a vertical shaft core and a submersible motor for driving the same, in which a casing is installed inside a stirring tank or the like. Directly connected, through a rib that also constitutes a part of the casing and is attached to the casing main body through a rib that also serves as a plurality of straightening plates that is attached to the upper suction side of the impeller that sucks in from above and discharges downward, The liquid in the tank is sucked from above the axial flow impeller and discharged again from below into the tank, whereby the liquid in the tank is agitated as in the conventional case.

After installation in the tank as described above, when it becomes necessary to disassemble the rotating body part for the purpose of checking the mechanical seal, etc., the rib that also serves as the casing body and the current plate (18)
Mounting bolts that are usually used for mounting to the outer peripheral tip of
(24) can be removed, and the rotating body portion can be pulled out upward while being integrated with the rib that also serves as the current plate. At this time, since the upper casing is removed, inspection work of the rotating body part can be easily performed. Further, after pulling out upward, the ribs also serving as the current plate and the rotating body portion are removed as needed outside the tank, and the detailed disassembly work is appropriately performed.

At the time of assembly, the rotating body portion is attached to the casing through the ribs that also serve as the current plate in a reverse order to the above.

A second aspect of the invention is to install a casing inside a stirring tank or the like, form a part of the casing while directly connecting the impeller having a vertical shaft core and its driving submersible motor, and from below. It is attached to the upper discharge side of the impeller that sucks in and discharges upward, and the outer side in the radial direction faces diagonally upward, and is operated with the upper inner casing located at a sufficient distance from the impeller, when attached to the casing. The liquid in the tank is sucked from below the axial flow impeller and discharged again from above into the tank, whereby the liquid in the tank is agitated.

After installing the product in the tank as described above, and especially when it is necessary to disassemble the rotor part for mechanical seal inspection, etc., the casing body and upper inner casing (36)
Mounting bolts that are usually used for mounting to the outer peripheral tip of
(24) can be removed, and the rotating body portion can be pulled out upward while remaining integral with the upper inner casing. At this time, since the upper casing is removed and a sufficient distance is provided between the upper inner casing and the axial flow impeller, inspections such as removal of impurities attached to the upper inner casing and the axial flow impeller are performed. The work can be easily removed by inspection (visual inspection) confirmation.

Further, after pulling out upward, outside the tank, the upper inner casing and the rotating body part are removed as needed, and the detailed disassembly work is performed.

At the time of assembly, the rotating body portion is attached to the casing through the upper inner casing in substantially the reverse order.

(Example) Next, the Example of this invention is described with drawing.

FIG. 1 is a side cross-sectional view of a stirring device showing an embodiment of the first invention of the present invention in an aeration device, which is a submersible motor (including a submersible geared motor as described above). 11 and the impeller 12 are directly connected to each other by a motor shaft 13 to form a rotating body portion, the shaft 13 is axially sealed by a mechanical seal 14, and the impeller boss 12a is open at the bottom. There is no change. The casing main body that constitutes the outer wall of the casing is composed of an upper casing 15 and a lower casing 16, which are joined by a flange 17, and inside the lower casing 16, a bottom plate 20 having a central portion protruding in a truncated mountain shape is formed. An air chamber 21 is formed above the chevron portion 20a so as to cover a chevron-shaped partition wall 19 having substantially the same shape, and the partition wall 19 and the lower casing 16 form a flow path in the impeller. ing.

The air chamber 21 is supplied with an arsenic-containing gas such as air sent from the air supply pipe 10 through an opening 20b in the central portion of the chevron portion 20a. Through the downward flow passage 22 formed in the air chamber 21, and is ejected from the injection port 23 formed in the lowermost part of the air chamber 21 to the flow passage in the impeller. The ejection port 23 has a circular slit shape, and a plurality of distance pieces 23a are arranged at intervals in the circumferential direction.
As a result, the height, that is, the slit width, is kept at a dimension that does not block with sludge or foreign matter, and the distance piece 23a
The area of the injection port is adjusted by the length in the circumferential direction, and the oxygen-containing gas is ejected into the liquid to be treated at the optimum wind speed. The distance piece 23a is
Although the one integrated with the partition wall 19 is shown, it may be a separate body or may be integrated with the bottom plate 20 side.

Further, in the upper end opening portion of the upper casing 15, that is, the inlet portion,
A plurality of ribs 18 that also function as straightening vanes
The inner peripheral ring portion of the rib 18 is attached by 24.
The flange portion 11a of the submersible motor 11 is attached to the 18a by bolts 24a, and the plurality of ribs 18 guide the fluid to the impeller and form a part of the casing. The lower end of a hanging metal fitting 25 is attached to the rib 18, and the entire apparatus is hung through the hanging metal fitting 25 and installed at the bottom of the tank. In the figure, reference numeral 26 indicates a guide support tool for lifting and lowering the entire apparatus along with the air supply conduit 10 by the hanging metal fitting 25.

In this embodiment, when the submersible motor 11 is driven in the state shown in the figure installed at the bottom of the aeration tank, the rotation of the impeller 12 causes the processing liquid in the tank to flow downward through the ribs 18 in the flow path inside the impeller. , And is discharged from the discharge port 16a into the tank. On the other hand, the oxygen-containing gas supplied to the air chamber 21 via the air supply conduit 10 is
It is jetted into the liquid to be treated in the flow path in the impeller from the lowermost injection port 23 through the downward flow path 22, and is sent into the aeration tank. At this time, the injection port area is adjusted so that the oxygen-containing gas is ejected at the optimum wind speed.

When it is necessary to disassemble the rotating body part for inspection of the mechanical seal due to use, remove the mounting bolts 24 between the upper end opening of the upper casing 15 and the outer periphery of the rib 18, and suspend it. If you lift it through the metal fittings 25,
The rotating body portion composed of the submersible motor 11 and the impeller 12 is integrated with the rib 18 forming a part of the casing, and the upper casing 15 and the lower casing constituting the casing body.
It is pulled out upward from 16 and the rotating part is inspected outside the tank. Also, if necessary, the motor flange
The mounting bolt 24a for the 11a and the rib 18 is removed, and the detailed disassembly work is performed.

At the time of assembling, the assembly work is carried out by attaching the outer periphery of the rib 18 and the upper casing 15 in a state in which the rib 18 is attached to the rotating body portion composed of the submersible motor 11 and the impeller 12 in substantially the reverse order. Ends.

According to this embodiment, the following effects are achieved.
(I) Attach the rotor part consisting of the impeller and the submersible motor to the rib that also serves as the current plate that constitutes the motor support,
Since the ribs are attached to the casing body, it is possible to remove the rotating body portion alone, and it becomes easy to inspect and disassemble the rotating body portion, and workability is improved.

(Ii) Since the injection port 23 is provided at the lowermost part of the air chamber 21 and the gas flow path 22 of the air chamber is always formed downward, the oxygen-containing gas is used to remove sludge and foreign substances once entering the air chamber. Can be pushed out.

(Iii) With the distance piece or the like, the slit width can be set to a constant width regardless of the amount of gas, and also from this point, the injection port is not clogged with sludge or impurities.

FIG. 2 is a side sectional view of the agitating device showing the second embodiment of the present invention used in the aerating device similarly to the first embodiment of the present invention. When it is installed in 38 and the liquid to be treated is sucked in from the horizontal direction as shown by the arrow (bottom left half of Fig. 2), the aeration device is installed at the upper end of the tube 39 and the liquid to be treated is directed vertically as shown by the arrow. The case of sucking into (the lower right half of FIG. 2) is shown. Also, FIG. 3 shows the second
It is a plan view of relevant parts of the portion A in FIG. 1 and, of the reference numerals shown in these drawings, the same reference numerals as those shown in FIG. 1 indicate the same or similar portions.

In this embodiment, the impeller 12 is configured to flow the liquid to be treated in the tank from the lower side to the upper side in the arrow direction, and is housed in the lower casing 16 that constitutes the casing body together with the upper casing 35. . Also the upper casing 35
Has an upper outer casing 35b attached to a horizontally opened discharge port with a guide vane 35a interposed therein, and is connected to the inner side of the upper outer casing 35b so as to extend it. An upper inner casing 36, which is located diagonally upward in the radial direction and is spaced apart from the impeller 12 by a sufficient distance and constitutes a part of the casing, is attached by a bolt 24.

In the rotating body portion including the submersible motor 11 and the impeller 12, the motor flange 11a is attached to the inner flange 36a of the upper inner casing 36 by the bolt 24a, and the lower end of the lifting metal fitting 25 is attached to the upper inner casing 36. Installed.

On the other hand, in the curved portion outside the upper casing 35, the air chamber 31
And the lower flange 32a of the outer wall 32 inclined inwardly forming the air chamber 31 is
And 16 are attached to both connecting flange parts. In the clasped portion, the outer peripheral portion of the flange 35c of the upper casing 35 is cut out in a chrysanthemum shape except for the periphery of the mounting bolt 33.
The inner peripheral portion of the lower flange 32a of the outer wall 32 of the air chamber is cut out in a chrysanthemum shape except for the periphery of the mounting bolt, and a gas passage 34 is formed in an overlapping portion of these notched portions (third part). Figure). The connecting portion between the gas passage 34 and the impeller passage is an injection port 34a. In the figure, 10 is a supply conduit for oxygen-containing gas, and 37 is a guide support rod.

According to this embodiment, by removing the mounting bolts 24 for the outer flange 36b of the upper inner casing 36 forming a part of the casing and the upper outer casing 35b, only the rotating body portion is hung through the hanging metal fittings 25. It can be easily extracted by disconnecting it from the upper casing 35 that constitutes the casing body. Therefore, similarly to the first embodiment of the invention, inspection and disassembly of the rotating body portion are facilitated and workability is improved.

Further, since the upper inner casing 36 is attached to the upper discharge side of the axial flow impeller 12, and the outer side in the radial direction is directed obliquely upward and is located at a sufficient distance from the impeller, the upper inner casing 36 is For inspection work such as removing foreign matters adhering to the axial flow impeller 12 and the like,
With the upper inner casing 36, by taking out as it is from the fixed casing bodies 16 and 35,
Inspection confirmation and removal can be done easily.

In addition, by changing the size of both notches formed in the joint portion between the lower flange 35c of the upper casing 35 and the lower flange 32a of the air chamber outer wall 32 inclined inward, the first invention is achieved. Similar to the embodiment described above, the area of the gas passage 34 and hence the area of the injection port 34a is adjusted without changing the slit width, and the oxygen-containing gas can be ejected into the liquid to be treated at the optimum wind speed. In addition, since the gas flow path of the air chamber is formed downward, it is possible to push out sludge and contaminants, and because the slit width can be secured uniformly, sludge and contaminants at the injection port are not blocked, etc. This is also similar to the first embodiment of the invention.

Although the aeration device has been described in the above embodiment, the present invention can be widely applied to general stirring devices.

(Effects of the Invention) As described above, according to the first invention of the present invention, it is used in the stirring tank, and the impeller shaft core is in the vertical direction,
In an agitator in which the liquid in the tank is sucked in from one side of the impeller and discharged from the other side, the impeller is formed into an axial flow type, and the rotation is made up of the axial flow type impeller and a submersible motor that is its driving machine. The body part constitutes a part of the casing that is detachable from the casing body, and the casing is provided with ribs that also serve as a plurality of straightening plates that are attached to the upper suction side of the impeller that sucks from above and discharges below. By attaching it to the main body, the rotor part including the impeller can be taken out as it is from the casing main body together with the ribs that also function as a plurality of straightening vanes that form a part of the casing during overhaul and inspection. As a result, the inspection and disassembly and assembly of the rotating body can be facilitated, and the workability is improved. Further, at this time, particularly since the impeller is of an axial flow type, it is easy to remove impurities attached to the front and back surfaces of the impeller. According to the second invention, the impeller is used in a stirring tank. ,
In an agitator in which the impeller shaft center is vertical and the liquid in the tank is sucked in from one side of the impeller and discharged from the other side, the impeller is formed into an axial flow type and the axial flow type impeller and its drive The rotating body part consisting of the underwater motor that is the machine,
It is attached to the upper discharge side of the impeller that constitutes part of the casing that is detachable from the casing body and that sucks in from below and discharges upward, with the radial outside facing diagonally upward and at a sufficient distance from the impeller. Since it is attached to the casing body via the upper inner casing located at the position, the rotor part including the impeller can be removed from the casing body together with the upper inner casing that constitutes a part of the casing during overhaul and inspection. Since it can be taken out as it is, not only the inspection and disassembly and assembly of the rotating body portion are facilitated and the workability is improved, but the upper inner casing attached to the discharge side of the axial flow impeller is The radial outside faces diagonally upward and is located at a sufficient distance from the axial flow impeller. Inspection work, such as removal of 該夾 matters adhered to the upper inner casing and an axial flow impeller during operation of the device is easily inspected, correspondence allows removal by visits confirmation.

[Brief description of drawings]

FIG. 1 is a side cross-sectional view of a stirring device used in an aeration device showing a first embodiment of the present invention, and FIG. 2 is a first embodiment showing a second embodiment of the present invention. Drawing similar to the figure,
FIG. 3 is a plan view of a main part of FIG. 2A, and FIG. 4 is an explanatory view of a conventional aeration apparatus. 11 …… Submersible motor, 12 …… Impeller, 15, 35 …… Upper casing, 16 …… Lower casing, 18 …… Rib, 21, 31…
… Air chamber, 23, 34a …… Injection port, 24, 24a …… Mounting bolt, 25 …… Hanging metal fitting, 36 …… Upper inner casing.

Front page continuation (72) Inventor Yutaka Kato 11-1 Haneda-Asahi-cho, Ota-ku, Tokyo Ebara Corporation (72) Inventor Osamu Nimura 1-6-27 Konan Minato-ku, Tokyo Ebara Infilco Co., Ltd. (72) Inventor Shigeru Kobayashi 1-6-27 Konan, Minato-ku, Tokyo Ebara Infilco Co., Ltd. (56) Bibliography SHO 55-2437 (JP, U) ACT 60-148025 (JP, U)

Claims (2)

[Claims] 1. An agitator for use in an agitating vessel, wherein the impeller shaft axis is vertical and the liquid in the vessel is sucked in from one side of the impeller and discharged from the other side. The impeller is formed in an axial flow type. In addition, an impeller that constitutes a part of the casing that is detachable from the casing body and that injects from above and exhales downwardly, the rotor part that consists of the axial flow type impeller and its driving machine , Which are attached to the upper suction side of the casing, are attached to the casing main body through ribs that also serve as a plurality of flow regulating plates, and at the time of overhaul and inspection, a plurality of flow regulating plates that form a part of the casing for the rotating body portion including the impeller. A stirrer characterized by being able to be taken out as it is from the casing main body together with the rib that doubles as the. 2. An agitator used in an agitating tank, wherein the impeller shaft axis is vertical and the liquid in the tank is sucked in from one of the impellers and discharged from the other, and the impeller is formed in an axial flow type. In addition, an impeller that forms a part of the casing that is detachable from the casing body and that inhales the rotor part that is composed of the axial-flow type impeller and a submersible motor that is a driving machine of the casing and discharges it upward. Via the upper inner casing, which is attached to the upper discharge side of the, and is radially outwardly directed diagonally upward and is located at a sufficient distance from the impeller,
An agitator characterized by being attached to the casing body, and at the time of overhaul and inspection, the rotor portion including the impeller can be taken out from the casing body as it is together with the upper inner casing forming a part of the casing. apparatus.