JP2003093861A - Submergible machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently disassemble a submergible mixer 5 provided with a casing 6 with a removable rear wall part 7, a motor 11 encased in the casing 6 and having an output shaft 10 with its end protruding beyond the front of the casing 6, and a propeller 12 attached to the front end of the output shaft 10 in a rotatable and integrated manner from the side of the rear of the casing 6. SOLUTION: A support 25 that supports the rear end 10a of the output shaft 10 is provided on the rear of the casing 6 in a manner attachable to or detachable from the casing 6. The support 25 is provided with a bracket 25g having a tapped hole 27 for disassembling situated nearly concentrically with the output shaft 10. The hole 27 is exposed by detaching the casing rear wall 7. An attachment bolt 17 is screwed in the hole 27 and is screwed inward in the state in which its front end is abutted against the rear end surface 10b of the output shaft 10 to enable the support 25 to be disassembled by backwardly pulling and moving the support 25 by the help of the attachment bolt 17.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an underwater machine used in a water tank such as a sewage treatment plant or a water storage plant, and more particularly to a technical field for improving workability when disassembling the underwater machine from the rear side of the casing. Belong to

[0002]

2. Description of the Related Art Generally, an underwater mixer is known which agitates the stored water for the purpose of purifying the stored water stored in, for example, a sewage treatment plant or a water storage plant. This submersible mixer is, for example, a hermetically-sealed cylindrical casing, a motor having an output shaft housed in the casing and having a tip portion protruding toward the front side of the casing, and rotatably attached to the tip portion of the output shaft. A propeller is provided, which is used to stir the stored water by generating a swirling flow in the stored water by operating the motor to rotate the propeller.

[0003]

By the way, when disassembling such a submersible mixer for the purpose of inspecting or repairing the bearing portion provided in the casing thereof, the stator of the motor, the rotor, etc. May need to be disassembled from the opposite output shaft rear end side.

However, since the supporting portion for supporting the rear end portion of the output shaft is firmly assembled to the casing by mounting the spigot portion or the like, it cannot be disassembled from the rear side of the casing and the motor is completely disassembled. There was a problem that I had to do it.

The present invention has been made in view of the above problems, and an object of the present invention is to improve the structure of a supporting portion that supports a rear end portion of an output shaft of an underwater machine such as a submersible pump. , It is to try to be able to disassemble the underwater machine efficiently from the rear side of the casing.

[0006]

In order to achieve the above object, in the present invention, the rear wall portion of the casing can be detached from other portions, and the rear end portion of the output shaft is supported at the rear portion inside the casing. The supporting portion of the above is detachably attached to the casing, and the supporting portion is moved relative to the output shaft by a screw so that the supporting portion can be easily pulled out rearward.

Specifically, according to the first aspect of the invention, a motor having a cylindrical casing having a removable rear wall portion and an output shaft housed in the casing and having a tip portion projecting to the front side of the casing. And a propeller mounted to the tip of the output shaft so as to rotate integrally with the propeller, wherein a support part for supporting the rear end of the output shaft is provided to the casing at a rear part of the casing. Removably provided, the support portion is provided with a bracket portion having a disassembly screw hole positioned substantially concentric with the output shaft,
A state in which the rear wall portion of the casing is removed to expose the disassembly screw hole, a screw member is screwed into the disassembly screw hole, and the tip of the screw member is brought into contact with the rear end surface of the output shaft. The supporting member is pulled backward by the screw member and moved by being screwed to be removed from the casing.

According to the above construction, when the submersible machine is disassembled from the rear side of the casing, first, the detachable rear wall portion of the casing is removed and the disassembly screw hole provided in the bracket portion of the support portion is removed. It is exposed and a screw member is screwed into this disassembly screw hole. Then, by screwing the tip end of the screw member in contact with the rear end face of the output shaft on the front side of the screw hole, the support portion is pulled rearward with respect to the output shaft only by the screw member to slide the support member. . As a result, the supporting portion can be easily removed from the casing. Therefore, even when the support part is firmly attached to the casing, it is not necessary to completely disassemble the motor, and the underwater machine can be efficiently disassembled from the rear side of the casing.

According to the second aspect of the present invention, the rear wall portion of the casing is detachably fixed to the rear wall portion of the casing by the mounting bolts so as to support the submersible machine so as to be movable up and down with respect to the guide bar.
The screw member is the mounting bolt.

According to the above construction, in the disassembling work from the rear side of the casing, as a pre-process, after removing the mounting bolt, the sliding portion is removed from the rear wall of the casing, and the mounting bolt extracted in this removing work is
In the work of removing the support portion in the subsequent step, the support member may be screwed into the screw hole of the bracket, and the support member may be pulled and moved backward by the action of the screwing. Therefore, a dedicated screw member for disassembling is not required, and the existing mounting bolt can be used also as a screw member, and disassembling workability can be improved.

In the third aspect of the invention, the underwater machine is an underwater mixer for stirring the stored water in the water tank. As a result, the submersible mixer can be easily inspected with good workability without completely disassembling the motor.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION In FIG. 7, P is a water tank composed of, for example, a sewage treatment plant, a water storage tank at various factories, pond lake water, a trench, a fish farm, and the like.
Is erected so as to extend from near the bottom surface P2 which is the underwater position in the water tank P to near the floor surface P3 around the water tank P which is located above the water surface W, and the upper end portion of the guide bar 1 is a side wall P1.
Is rotatably supported by an upper bracket 2 which is fixedly mounted on the bottom base 3 and a lower base 3 which is mounted and fixed on a bottom surface P2 by a lower base 3.

An underwater mixer 5 as an underwater machine is supported on the guide bar 1 so as to be able to move up and down. As shown in FIG. 1, the submersible mixer 5 is a motor 1 having a closed cylindrical casing 6 and an output shaft 10 housed in the casing 6 and having a tip portion projecting to the front side of the casing 6.
1 and a propeller 12 mounted on the tip of the output shaft 10 of the motor 11 so as to rotate together. An annular guide plate 13 having a smaller diameter toward the front is provided around the propeller 12 for the purpose of effectively maintaining the stirring energy of the stored water over a long distance.

The casing 6 comprises a casing body 8 having a front wall portion and accommodating the motor 11, and a rear wall portion 7 removably fixed to the rear end portion of the casing body 8. On the rear wall portion 7, a slide portion 15 for integrally supporting the underwater mixer 5 on the guide bar 1 in a vertically movable manner is attached and fixed. The slide portion 15 is formed in a U-shaped cross-section including a slide portion main body 15a and a pair of support plate portions 15b and 15b extending rearward in parallel from the left and right side portions of the slide portion main body 15a. A pair of upper and lower rollers (not shown) are axially supported on the inner surfaces of the front end portions (rear end portions) of the support plate portions 15b, 15b.
Further, as shown in FIG. 5, the rear wall portion 7 of the casing 6 is provided with slide portion screw holes 7a, 7a, ..., On the other hand, the slide portion main body 15a of the slide portion 15 is provided with the slide portion. The mounting holes 15c, 15c, ... Are provided so as to correspond to the part screw holes 7a, 7a ,. Then, as shown in FIG. 6, the mounting bolts 17, 17, ... As screw members are attached to the mounting holes 15c, 15 of the slide portion 15.
c, ..., and screw holes 7a for slide portion of the rear wall portion 7,
The slide portion 15 is attached and fixed to the rear wall portion 7 of the casing 6 by being screwed and fastened to the casings 7a, .... In this state, the main body 15a of the slide portion 15 and the support plate 15
The underwater mixer 5 is supported so as to be able to move up and down while the guide bar 1 is sandwiched between b and 15b and rollers.

As shown in FIG. 7, a power cable 18 for supplying electric power to the internal motor 11 is penetrated through the rear wall portion 7 of the casing 6 in a watertight manner. Further, a support plate 19 extending upward (upper side in FIG. 7) is fixed to the outer peripheral surface of the casing body 8, and a plurality of through holes 19a, 19a, ... Are opened side by side in the support plate 19. The lower end of the chain 20 is connected to any one of these, and the upper end of the chain 20 is locked and held by the upper bracket 2 to support the submersible mixer 5 in a state of being suspended by the chain 20. Has been done.

As shown in the enlarged view of FIG. 2, the rear end portion 1 of the output shaft 10 is provided at the rear portion of the casing 6.
A substantially disk-shaped support portion 25 that supports 0a is provided so as to be attachable to and detachable from the casing body 8. That is, as shown in FIG. 3, the outer peripheral portion of the support portion 25 is formed with a flange portion 25a that protrudes to the front side. A stepped fitted groove 8a is provided at the rear end of the inner peripheral surface of the casing body 8. On the other hand, as shown in FIG.
A fitting groove 25b to be fitted into the fitted groove 8a is provided at the front end of the outer peripheral surface of the flange portion 25a, and is supported by fitting the fitted groove 8a and the fitting groove 25b. Part 2
5 is positioned and fixed to the casing body 8. The support portion 25 is provided with plate-shaped reinforcing ribs 25c, 25c, ...

As shown in FIG. 2, a cylindrical bearing portion 25d protruding forward is integrally formed at the center of the support portion 25, and the rear end portion 10a of the output shaft 10 is formed in the bearing portion 25d. Are rotatably supported via bearings 26.

Further, as shown in FIGS. 1 and 3, a plurality of bottomed stud bolt holes 25e, 25e, ... -Like through bolt holes 25f, 25f, ... Are provided at equal intervals in the circumferential direction, and the stud bolts 28 are screwed and fixed in the stud bolt screw holes 25e. A through bolt 29 is inserted into the screw hole 25f, and a tip portion of the through bolt 29 is screwed and fastened to the casing body 8. The through bolts 29, 29,
The support portion 25 is integrally fixed to the casing body 8 by.

Similarly, as shown in FIGS. 5 and 6, the rear wall portion 7 of the casing 6 has stud bolt insertion holes 7b,
7b, ... Are screw holes 25e, 25e ,.
It is provided to correspond to. Then, the stud bolts 28, 28, ... Screwed and fixed to the support portion 25 are inserted into the stud bolt insertion holes 7b, 7b ,. , 30, ... are screwed and fastened to each other, so that the support portion 25 is attached to the casing 6 from the rear side.
Is covered by the rear wall portion 7, and the rear wall portion 7 supports the support portion 25.
The casing 6 is kept watertight by being fastened and fixed.

Further, as shown in FIG.
A bracket portion 25g forming a bottom wall of the bearing portion 25d is integrally formed on the rear side of the bearing portion 25d, and a disassembly screw hole 27 located substantially concentrically with the output shaft 10 is opened at the center of the bracket portion 25g. Has been done. The disassembly screw hole 27 and the rear end surface 10b of the rear end portion 10a of the output shaft 10 are arranged close to each other, and the mounting bolt 17 can be screwed into the disassembly screw hole 27.

Next, a procedure for disassembling the underwater mixer 5 from the rear side of the casing 6 in the above embodiment will be described.
First, as shown in FIG. 6, the mounting bolts 17, 1 for fixing the sliding portion 15 to the rear wall portion 7 of the casing 6 by screwing are fixed.
Loosen and remove 7, ...
Remove 5.

Next, the nuts 30, 30, ... Screwed to the studs 28, 28 ,.
The rear wall portion 7 is removed from the support portion 25 at the rear portion inside the casing 6. As a result, the supporting portion 25 is exposed.

After removing the through bolt 29, as shown in FIGS. 1 and 2, the mounting bolt 17 removed in the previous step is attached to the disassembly screw hole 27 of the bracket portion 25g of the exposed support portion 25. Screw it from the rear and move it forward. Then, in the middle of the process, the tip of the mounting bolt 17 contacts the rear end surface 10b of the output shaft 10 located substantially concentrically in the disassembly screw hole 27, and in this contact state, the mounting bolt 17 is further advanced. Then, this time, mounting bolt 1
At 7, the support portion 25 is pulled and moved rearward. As a result, the support portion 25 is removed from the casing body 8.

At this time, since the mounting bolt 17 removed in the previous step of removing the slide portion 15 is used in the subsequent step of removing the supporting portion 25, it is not necessary to separately prepare a bolt for removal. The mounting bolt 17 can be used as a screw member for disassembly.

Therefore, even if the support portion 25 is firmly assembled to the casing 6, the underwater mixer 5 can be efficiently disassembled from the rear side of the casing 6 without completely disassembling the motor 11. .

In the above embodiment, the screw member is the mounting bolt 17 for mounting and fixing the slide portion 15. However, any screw member can be used as long as it can be removed in the previous step of the work for removing the support portion 25. Furthermore, if the size is the same as the disassembly screw hole 27 of the bracket portion 25g of the support portion 25,
Others may be used.

Further, in the above embodiment, the submersible machine is an underwater mixer for stirring the stored water in the water tank, but it may be another submersible machine such as a submersible pump or a submerged aerator, and the same action and effect can be obtained. can get.

[0028]

As described above, according to the invention of claim 1, a support portion for supporting the rear end portion of the output shaft is detachably provided in the casing of the underwater machine. By providing the bracket having the substantially concentric disassembly screw holes, the rear wall portion of the casing is removed, and the screw members are screwed into the disassembly screw holes exposed and screwed, and the support portion is moved backward by the screw members. The underwater machine can be efficiently disassembled from the rear side of the casing.

According to the invention of claim 2, the screw member is a bolt for detachably fixing the slide portion to the rear wall portion of the casing, whereby the underwater machine can be disassembled more efficiently.

According to the invention of claim 3, since the underwater machine is an underwater mixer for agitating the stored water in the water tank, it is not necessary to completely disassemble the underwater mixer, and its inspection can be performed easily and with good workability. You can

[Brief description of drawings]

FIG. 1 is a diagram showing an operation of disassembling an underwater mixer from a rear side of a casing according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing an enlarged main part in disassembly work.

FIG. 3 is a view on arrow III in FIG.

FIG. 4 is a sectional view of a support portion.

5 is a view from the direction of the arrow V in FIG.

FIG. 6 is a view showing a work state in which a slide portion is removed from a rear end portion of a casing.

FIG. 7 is a perspective view showing an installation state of an underwater mixer in a water storage tank.

[Explanation of symbols]

5 Underwater mixer 6 casing 7 Rear wall 10 Output shaft 10a rear end 10b rear end face 11 motor 12 propellers 15 Slide part 17 Mounting bolt 25 Support 25g bracket part 27 Disassembly screw hole

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takehisa Watanabe             14 Sakudai, Ono City, Hyogo Prefecture Shinmeiwa Industry Co., Ltd.             Industrial Machinery Systems Division (72) Inventor Kazuki Takeuchi             14 Sakudai, Ono City, Hyogo Prefecture Shinmeiwa Industry Co., Ltd.             Industrial Machinery Systems Division F-term (reference) 4G078 AA13 AB20 BA01 BA03 CA12                       CA23 DA19 DB08 DB10 EA20

Claims (3)

[Claims] 1. A cylindrical casing having a removable rear wall portion, a motor having an output shaft housed in the casing and having a tip portion projecting to the front side of the casing, and a motor rotating at the tip portion of the output shaft. An underwater machine including a propeller mounted integrally, wherein a support portion for supporting a rear end portion of the output shaft is provided at a rear portion of the casing in a detachable manner with respect to the casing. Is provided with a bracket portion having a screw hole for disassembly substantially concentric with the output shaft, the rear wall portion of the casing is removed to expose the screw hole for disassembly, and the screw hole for disassembly is provided. By screwing the screw member and screwing the tip end of the screw member in contact with the rear end face of the output shaft, the support member is pulled rearward by the screw member to be moved to remove it from the casing. Shitako Water machine and said. 2. The underwater machine according to claim 1, wherein a slide portion for supporting the underwater machine so as to be capable of moving up and down with respect to the guide bar is detachably fixed to the rear wall portion of the casing with a mounting bolt, and the screw member is mounted on the mounting portion. An underwater machine characterized by being a bolt. 3. The underwater machine according to claim 1, which is an underwater mixer for agitating the stored water in the water tank.