JP4624614B2 - Underwater machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an underwater machine used in a water tank such as a sewage treatment plant or a water storage site, and particularly to a technical field for improving workability when the underwater machine is disassembled from the rear side of a casing.
[0002]
[Prior art]
In general, for example, an underwater mixer that stirs the stored water for the purpose of purifying the stored water stored in a sewage treatment plant or a water storage station is known. The underwater mixer is, for example, a sealed cylindrical casing, a motor that is housed in the casing, and has an output shaft whose front end protrudes to the front side of the casing, and a rotary integral attached to the front end of the output shaft. The propeller is provided, and the motor is operated to rotate the propeller, thereby generating a swirling flow in the stored water and being used to stir the stored water.
[0003]
[Problems to be solved by the invention]
By the way, when such an underwater mixer is disassembled for the purpose of inspection or repair of the bearing portion provided in the casing, the stator of the motor, the rotor, etc., the output shaft rear end side opposite to the propeller side May need to be decomposed from.
[0004]
However, since the support part that supports the rear end of the output shaft is firmly assembled to the casing by attaching the spigot part or the like, it cannot be disassembled from the rear side of the casing, and the motor must be completely disassembled. There was a problem that had to be done.
[0005]
The present invention has been made in view of such points, and an object of the present invention is to improve the structure of the support portion that supports the rear end portion of the output shaft of the underwater machine such as a submersible pump. Is to make it possible to efficiently disassemble the casing from the rear side of the casing.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, the rear wall portion of the casing can be detached from other portions, and a support portion for supporting the rear end portion of the output shaft can be attached to and detached from the casing at the rear portion in the casing. The supporting portion is moved relative to the output shaft by a screw so that it can be easily pulled out rearward.
[0007]
Specifically, in the invention of claim 1, a cylindrical casing in which the rear wall portion can be removed, a motor having an output shaft that is housed in the casing and has a tip portion protruding toward the front side of the casing, An underwater machine including a propeller that is attached to the tip end portion of the output shaft so as to rotate integrally. A support portion that supports the rear end portion of the output shaft is detachably attached to the casing at the rear portion in the casing. The support portion is provided with a bracket portion having a disassembly screw hole positioned substantially concentrically with the output shaft, and the rear wall portion of the casing is removed to expose the disassembly screw hole. The screw member is screwed into the screw hole for disassembly, and the support member is pulled backward by the screw member by screwing the screw member in a state where the tip of the screw member is in contact with the rear end surface of the output shaft. Remove from the casing It is configured in Suyo.
[0008]
According to the above configuration, first, when disassembling the underwater machine from the rear side of the casing, the removable rear wall portion of the casing is removed, and the screw holes for disassembly provided in the bracket portion of the support portion are exposed, A screw member is screwed into this disassembly screw hole. Then, by screwing the screw member in a state in which the tip of the screw member is in contact with the rear end surface of the output shaft on the front side of the screw hole, the support portion is pulled backward with respect to the output shaft by only the screw member to be slid . Thus, the support part can be easily removed from the casing. Therefore, even when the support portion is firmly assembled 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.
[0009]
In a second aspect of the present invention, a slide portion that supports the underwater machine so as to be movable up and down with respect to the guide bar is fixed to the rear wall portion of the casing so as to be removable, and the screw member is the mounting bolt.
[0010]
According to the above configuration, in the disassembly work from the rear side of the casing, as a pre-process, after removing the mounting bolt, the slide part is removed from the rear wall part of the casing, and the mounting bolt extracted in this removing work is supported in the post-process. It is only necessary to screw the screw into the screw hole of the bracket in the work of removing the part, and pull the support member backward by the action of the screwing. Therefore, a dedicated screw member for disassembly is not required, and an existing mounting bolt can be used as a screw member, so that disassembly workability can be improved.
[0011]
In the invention of claim 3, the underwater machine is an underwater mixer for stirring the stored water in the water tank. This makes it possible to easily check the underwater mixer with good workability without completely disassembling the motor.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
In FIG. 7, P is a tank composed of, for example, a sewage treatment plant, a water storage in various factories, a pond lake water, a salmon, a fish farm, and the like, and a guide bar 1 is located on the side wall P1 of the tank P. The upper end of the guide bar 1 is erected so as to extend from near the bottom surface P2 to near the floor surface P3 around the water tank P, which is located above the water surface W. The lower ends are rotatably supported by the lower base 3 that is fixedly attached to the bottom surface P2.
[0013]
An underwater mixer 5 as an underwater machine is supported on the guide bar 1 so as to be movable up and down. As shown in FIG. 1, the underwater mixer 5 includes a sealed cylindrical casing 6, a motor 11 that is accommodated in the casing 6, and that has an output shaft 10 whose front end projects from the front side of the casing 6. And a propeller 12 attached to the tip of the output shaft 10 of the motor 11 so as to rotate together. For the purpose of effectively maintaining the stirring energy of the stored water to a long distance, an annular guide plate 13 having a small diameter toward the front is provided around the propeller 12.
[0014]
The casing 6 includes a casing body 8 having a front wall portion and accommodating the motor 11, and a rear wall portion 7 detachably fixed to a rear end portion of the casing body 8. 7, a slide portion 15 for supporting the underwater mixer 5 on the guide bar 1 so as to be movable up and down is integrally 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 in parallel rearward from the left and right side portions of the slide portion main body 15a. A pair of upper and lower rollers (not shown) are pivotally supported on the inner surfaces of the front end portions (rear end portions) of the support plate portions 15b and 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,..., While the slide portion main body 15a of the slide portion 15 is provided with the slide. Mounting holes 15c, 15c,... Are provided so as to correspond to the part screw holes 7a, 7a,. As shown in FIG. 6, the mounting bolts 17, 17,... As screw members are inserted into the mounting holes 15 c, 15 c,. The slide portion 15 is attached and fixed to the rear wall portion 7 of the casing 6 by screwing and tightening to. In this state, the submerged mixer 5 is supported so as to be movable up and down while the guide bar 1 is sandwiched between the main body 15a of the slide portion 15, the support plates 15b and 15b, and the rollers.
[0015]
In addition, as shown in FIG. 7, the power cable 18 for supplying electric power to the internal motor 11 is penetrated in the rear wall part 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,... 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 so that the underwater mixer 5 is supported in a suspended state by the chain 20. Has been.
[0016]
As shown in detail in FIG. 2, a substantially disc-shaped support portion 25 that supports the rear end portion 10 a of the output shaft 10 is detachably attached to the casing body 8 at the rear portion in the casing 6. Is provided. That is, as shown in FIG. 3, a flange portion 25 a that protrudes forward is formed on the outer peripheral portion of the support portion 25. A stepped groove 8 a is provided at the rear end of the inner peripheral surface of the casing body 8. On the other hand, as shown in FIG. 4, the front end of the outer peripheral surface of the flange portion 25a of the support portion 25 is provided with a fitting groove 25b fitted into the fitting groove 8a. The support portion 25 is positioned and fixed to the casing body 8 by fitting the groove 8a and the fitting groove 25b. The support portion 25 is provided with plate-like reinforcing ribs 25c, 25c,.
[0017]
As shown in FIG. 2, a cylindrical bearing portion 25d protruding forward is integrally formed at the center portion of the support portion 25, and the rear end portion 10a of the output shaft 10 is provided in the bearing portion 25d with the bearing 26. It is rotatably supported through
[0018]
Further, as shown in FIGS. 1 and 3, the rear surface of the flange portion 25a of the support portion 25 is provided with a plurality of bottomed screw bolt holes 25e, 25e,... The bolt holes 25f, 25f,... Are provided at equal intervals in the circumferential direction, and the stud bolts 28 are screwed and fixed to the stud bolt screw holes 25e, while the through bolt screw holes 25f. A through bolt 29 is inserted, and a tip end portion of the through bolt 29 is screwed and fastened to the casing body 8, and the support portion 25 is integrally attached and fixed to the casing body 8 by the through bolts 29, 29,. Has been.
[0019]
Similarly, as shown in FIGS. 5 and 6, the stud bolt insertion holes 7 b, 7 b,... Correspond to the stud bolt screw holes 25 e, 25 e,. It is provided as follows. .. Are inserted into the stud bolt insertion holes 7b, 7b,... And screwed into the support portion 25, and nuts 30 are inserted into the stud bolts 28, 28,. , 30,... Are screwed and fastened so that the support portion 25 is covered by the rear wall portion 7 of the casing 6 from the rear, and the rear wall portion 7 is fastened and fixed to the support portion 25 so that the casing 6 is watertight. It is kept in.
[0020]
As shown in FIG. 2, a bracket portion 25g constituting a bottom wall is integrally formed on the rear side of the bearing portion 25d in the support portion 25, and the output shaft 10 and the bracket portion 25g are formed at the center of the bracket portion 25g. A disassembling screw hole 27 that is positioned substantially concentrically is opened. The disassembling screw hole 27 and the rear end surface 10b of the rear end portion 10a of the output shaft 10 are disposed close to each other, and the mounting bolt 17 can be screwed into the disassembling screw hole 27.
[0021]
Next, in the above embodiment, a procedure for disassembling the underwater mixer 5 from the rear side of the casing 6 will be described. First, as shown in FIG. 6, the mounting bolts 17, 17,... That fasten and fix the slide portion 15 to the rear wall portion 7 of the casing 6 are loosened and removed, and the slide portion 15 is removed from the casing 6.
[0022]
Next, the nuts 30, 30,... Screwed to the studs 28, 28,... Are removed, and the rear wall portion 7 of the casing 6 is removed from the support portion 25 at the rear portion in the casing 6.
As a result, the support portion 25 is exposed.
[0023]
Then, after removing the through bolt 29, as shown in FIGS. 1 and 2, the mounting bolt 17 removed in the previous step is screwed from the rear into the disassembling screw hole 27 of the bracket portion 25g in the exposed support portion 25. Combine and screw. Then, on the way, the tip of the mounting bolt 17 comes into contact with the rear end face 10b of the output shaft 10 positioned substantially concentrically with the disassembling screw hole 27, and the mounting bolt 17 is further screwed in this contact state. Then, the support portion 25 is pulled and moved backward by the mounting bolt 17 this time.
As a result, the support portion 25 is removed from the casing body 8.
[0024]
At this time, since the mounting bolt 17 removed in the removal process of the slide part 15 which is the previous process is used in the removal process of the support part 25 in the subsequent process, there is no need to prepare a bolt for removal separately. 17 can be used as a screw member for disassembly.
[0025]
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.
[0026]
In the above embodiment, the screw member is the mounting bolt 17 for mounting and fixing the slide portion 15. However, the screw member may be a screw member that is removed in the previous step of the removal work of the support portion 25. Any other size may be used as long as it is the same size as the disassembling screw hole 27 of the bracket portion 25g of the support portion 25.
[0027]
In the above embodiment, the underwater machine is an underwater mixer that stirs the stored water in the water tank. However, other underwater machines such as an underwater pump and an underwater aerator may be used, and similar effects can be obtained.
[0028]
【The invention's effect】
As described above, according to the first aspect of the present invention, in the casing of the underwater machine, the support portion that supports the rear end portion of the output shaft is detachably provided, and the support portion is disassembled substantially concentrically with the output shaft. By removing the rear wall of the casing and screwing the screw member into the disassembled screw hole, and screwing it forward, and pulling the support portion backward with the screw member The underwater machine can be efficiently disassembled from the rear side of the casing.
[0029]
According to the second aspect of the present invention, the screw member is a bolt that detachably fixes the slide portion to the casing rear wall portion, whereby the underwater machine can be disassembled more efficiently.
[0030]
According to the invention of claim 3, since the underwater machine is an underwater mixer that stirs the stored water in the water tank, it is not necessary to completely disassemble the underwater mixer, and the inspection can be easily performed with good workability.
[Brief description of the drawings]
FIG. 1 is a diagram showing an operation of disassembling an underwater mixer in an embodiment of the present invention from the rear side of a casing.
FIG. 2 is an enlarged cross-sectional view showing a main part in disassembly work.
3 is a view taken in the direction of the arrow III in FIG.
FIG. 4 is a cross-sectional view of a support portion.
5 is a view in the direction of the arrow V in FIG.
FIG. 6 is a diagram showing a working state in which the slide part is removed from the rear end of the casing.
FIG. 7 is a perspective view showing an installation state of the submerged mixer in the water storage tank.
[Explanation of symbols]
5 Submersible mixer 6 Casing 7 Rear wall portion 10 Output shaft 10a Rear end portion 10b Rear end surface 11 Motor 12 Propeller 15 Slide portion 17 Mounting bolt 25 Support portion 25g Bracket portion 27 Disassembly screw hole

Claims (3)

A cylindrical casing from which the rear wall can be removed;
A motor having an output shaft housed in the casing and having a front end projecting toward the front of the casing;
An underwater machine provided with a propeller attached integrally to the tip of the output shaft,
A support portion that supports the rear end portion of the output shaft is detachably attached to the casing at the rear portion in the casing,
The support portion is provided with a bracket portion having a disassembly screw hole positioned substantially concentrically with the output shaft,
A state in which the rear wall portion of the casing is removed to expose the screw hole for disassembly, a screw member is screwed into the screw hole for disassembly, and the tip of the screw member is in contact with the rear end surface of the output shaft The underwater machine is characterized in that the support portion is pulled backward by the screw member to be removed from the casing by being screwed by the screw. The underwater machine according to claim 1,
On the rear wall portion of the casing, a slide portion that supports the underwater machine so as to be movable up and down with respect to the guide bar is fixed by a mounting bolt so as to be removable.
An underwater machine, wherein the screw member is the mounting bolt. The underwater machine according to claim 1, wherein the underwater machine is an underwater mixer that stirs the stored water in the water tank.

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