Stirrer and jig and method for replacing bearing part from the same

Abstract

To address the problem with a conventional stirrer that bearing replacement work takes time.SOLUTION: This stirrer comprises: a body frame including a top plate, a bottom plate, and three support pillars spaced from one another to connect the top plate and the bottom plate and fixed to a stirring container outer part; a motor fixed to the body frame; and a stirring shaft having stirring means in a lower part and connected to the motor by a joint and rotatably supported on a bearing fixed to the body frame. The lower part of the stirring shaft is provided in the stirring container to penetrate the same. In the body frame, the lower end of a motor shaft of the motor and the upper end of the stirring shaft are separated by a desired distance and connected by the joint, and the bearing is provided in the body frame.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a stirrer that is fixed outside a stirring container and stirs the contents in the stirring container by a stirring blade at the lower end inserted into the stirring container, a jig for supporting the stirring shaft of the stirrer on the main body frame of the stirrer when replacing a bearing portion from the stirrer, and a method for replacing the bearing portion of the stirrer.

Background Art

[0002] For example, in order to stir the contents in a stirring container such as a large processing tank, the main body frame of a stirrer having a rotating long shaft with a stirring blade fixed to the lower end is attached to the upper end opening of the stirring container, and the rotating long shaft at the lower end is inserted into the stirring container through the opening for use.

[0003] A bearing portion that rotatably supports the rotating long shaft of such a stirrer and a mechanical seal portion for preventing liquid leakage from the stirring container are consumable parts, and thus need to be replaced regularly, for example, every two years.

[0004] (1. Description of a conventional stirrer)

[0005] FIG. 10 shows a conventional agitator 1. 2 is a main body frame composed of a ceiling plate 2a, a bottom plate 2b, and four columns 11 that are equally spaced from each other and connect the ceiling plate 2a and the bottom plate 2b. The main body frame 2 is fixed to the flange 3c at the upper end of the neck portion 3b with an opening provided in the ceiling portion 3a of the stirring container 3 such as a large processing tank. 4 is a motor unit fixedly provided on the ceiling plate 2a of the main body frame 2. 4a is a speed reducer of the motor unit 4. 5 is a motor shaft of the motor unit 4 that extends vertically downward through an opening formed in the ceiling plate 2a of the main body frame 2. 6 is a vertically provided stirring shaft connected to the motor shaft 5. The stirring shaft 6 extends downward through the through hole 2c in the bottom plate 2b of the main body frame 2 and the opening in the neck portion 3b of the ceiling portion 3a of the stirring container 3. At the lower part of the stirring shaft 6 in the stirring container 3, stirring means such as a stirring blade (not shown) is provided.

[0006] Also, 7 is a shaft joint (coupling) that connects the motor shaft 5 and the stirring shaft 6. 8 is a bearing portion such as a ball bearing that rotatably supports the stirring shaft 6 with respect to the main body frame 2. 9 is a mechanical seal portion provided between the through hole 2c in the bottom plate 2b of the main body frame 2 and the stirring shaft 6. Note that 9b is a split mechanical cover that covers the mechanical seal portion 9.

[0007] The shaft joint 7 is composed of an intermediate shaft 7a, an upper flange 7b and a lower flange 7c respectively fixed to the upper and lower ends of the intermediate shaft 7a. The lower flange 5a fixed to the lower end of the motor shaft 5 and the upper flange 7b of the intermediate shaft 7a are connected by bolts 10. Also, the upper flange 6a fixed to the upper end of the stirring shaft 6 and the lower flange 7c of the intermediate shaft 7b are connected by bolts 10 so that the motor shaft 5 and the stirring shaft 6 are connected.

[0008] Also, the main body frame 2 utilizes the opening 11a formed between two adjacent columns 11, 11 to attach and detach the intermediate shaft 7a from the motor shaft 5 and the stirring shaft 6.

[0009] Further, only the outer ring 8a portion of the bearing portion 8 is fitted and fixed from above into a recess 12 formed around the edge of a through hole 2e in the intermediate plate 2d of the main body frame 2, and the stirring shaft 6 press-fitted and fixed to the inner ring 8b of the bearing portion 8 is supported by the bearing portion 8 on the main body frame 2 and is rotatably provided.

[0010] Note that the outer diameter of the stirring shaft 6 is formed smaller than the diameter of the portion where the bearing portion 8 is press-fitted in the portion above the portion where the bearing portion 8 is press-fitted, and if the press-fitted bearing portion 8 is moved upward, the bearing portion can be easily removed.

[0011] Next, a method for replacing the bearing portion and the mechanical seal portion of the conventional stirrer will be described.

[0012] In replacing the bearing portion and the mechanical seal portion, first, the bolts 10 are removed from the motor shaft 5 and the stirring shaft 6, the connection of the intermediate shaft 7a is released, and the intermediate shaft 7a is removed.

[0013] Also, the upper flange 6a is removed from the stirring shaft 6 so that the bearing portion 8 and the mechanical seal portion 9 can be removed from the upper end of the stirring shaft 6.

[0014] Then, when the bearing portion 8 that supports the stirring shaft 6 on the main body frame 2 is removed from the stirring shaft 6, in order to prevent the stirring shaft 6 from falling off the main body frame 2, the stirring shaft 6 is suspended by a crane or the like, and the press-fitted bearing portion 8 is moved upward with respect to the stirring shaft 6 so that the bearing portion 8 can be removed from the upper end of the stirring shaft 6.

[0015] Also, the mechanical seal portion 9 is moved upward with respect to the stirring shaft 6 so that it can be removed from the upper end of the stirring shaft 6.

[0016] Then, insert a new mechanical seal part from the upper end of the stirring shaft 6, and press-fit a new bearing part 8, which has been heated by a bearing warmer or the like, into a desired position on the stirring shaft 6, cool it and fix it, and fit the bearing part 8 into the recess 12 of the main body frame 2 from above, so as to rotatably support the stirring shaft 6 on the main body frame 2.

[0017] Then, remove the stirring shaft 6 from a crane or the like, and connect the motor shaft 5 and the stirring shaft 6 by means of the removed intermediate shaft 7a.

[0018] In the conventional agitator, since the motor shaft 5 and the stirring shaft 6 are connected by using the intermediate shaft 7a, when replacing parts such as the bearing part, the bearing part and the like can be replaced by removing the intermediate shaft 7a.

[0019] Therefore, when replacing parts such as the bearing part, it is not necessary to remove the agitator itself from the huge treatment tank, so that the economy and safety are improved.

[0020] As such an agitator, there is FIG. 3 of Patent Document 1.

Prior Art Documents

Patent Documents

[0021]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0022] However, in the conventional agitator, a space for fastening the upper and lower bolts 7 for connecting the intermediate shaft is required, the main body frame becomes large, and accordingly, there is a drawback that the vibration also becomes large.

[0023] Also, when removing the intermediate shaft 7a, it is necessary to separate the motor shaft 5 and the stirring shaft 6, and such separating means was required.

[0024] Also, when replacing parts such as the bearing part, it is necessary to suspend the stirring shaft 6 with a crane or the like so that the stirring shaft 6 does not fall off from the main body frame 2. Also, since the opening 11a of the main body frame 2 is narrow, it is difficult to remove the bearing part press-fitted from the stirring shaft of the stirrer, and the replaceability was poor.

[0025] The present invention provides a stirrer capable of easily performing assembly work and disassembly work inside the main body frame.

Means for Solving the Problems

[0026] To achieve the above object, the stirrer of the present invention includes a ceiling plate, a bottom plate, and three spaced-apart struts connecting the ceiling plate and the bottom plate, a main body frame fixed outside the stirring container, a motor part fixed to the main body frame, and a stirring shaft having stirring means at the lower part, which is connected to the motor part via a joint and is rotatably supported by a bearing part fixed to the main body frame. The lower part of the stirring shaft penetrates the stirring container and is provided in the stirring container. Inside the main body frame, the lower end of the motor shaft of the motor part and the upper end of the stirring shaft are separated by a desired distance and are connected by the joint, and the bearing part is provided in the main body frame.

[0027] Also, the stirring shaft is provided to penetrate the stirring container via a seal part.

[0028] Also, the jig used when replacing the bearing part from the stirrer comprises a main body frame fixed to the outside of the stirring container, which consists of a ceiling plate, a bottom plate, and columns connecting the ceiling plate and the bottom plate, a motor part fixed to the upper part of the main body frame, a stirring shaft having stirring means at the lower part, which is connected to the motor part via a joint and is rotatably supported by a bearing part fixed to the main body frame, the lower part of the stirring shaft penetrating the stirring container and being provided in the stirring container, in the main body frame, the lower end of the motor shaft of the motor part and the upper end of the stirring shaft being separated by a desired distance and connected by the joint, and the stirring shaft of the stirrer provided with the bearing part in the main body frame being characterized by comprising support means used to support it on the main body frame when replacing the bearing part from the stirrer.

[0029] Also, the support means is a shaft support jig body fixed to the main body frame, which has a convex part engaged with a groove part provided in the stirring shaft and supports the stirring shaft.

[0030] In addition, the method for replacing the bearing portion of the stirrer of the present invention comprises a main body frame fixed to the outside of the stirring container, which consists of a ceiling plate, a bottom plate, and columns connecting the ceiling plate and the bottom plate, a motor portion fixed to the upper portion of the main body frame, and a stirring shaft having stirring means at the lower portion, which is connected to the motor portion via a joint and is rotatably supported by a bearing portion fixed to the main body frame. The lower portion of the stirring shaft penetrates the stirring container and is provided in the stirring container. In the main body frame, the lower end of the motor shaft of the motor portion and the upper end of the stirring shaft are separated by a desired distance and connected by the joint, and the stirring shaft of the stirrer provided with the bearing portion in the main body frame is supported by the support means on the main body frame. The method includes a first step of removing the joint between the motor shaft and the stirring shaft and separating the motor portion from the stirring shaft, a second step of removing the bearing portion from the main body frame and removing it from the upper end of the stirring shaft, a third step of inserting a new bearing portion into the upper end of the stirring shaft and fixing the new bearing portion to the stirring shaft and the main body frame, and a fourth step of connecting the motor shaft and the stirring shaft by a joint and removing the support means from the stirring shaft and the main body frame.

[0031] In addition, the method for replacing the bearing portion of the stirrer comprises a main body frame fixed to the outside of the stirring container, which consists of a ceiling plate, a bottom plate, and columns connecting the ceiling plate and the bottom plate, a motor portion fixed to the upper part of the main body frame, and a stirring shaft having stirring means at the lower part, which is connected to the motor portion via a joint and is rotatably supported by a bearing portion fixed to the main body frame. The lower part of the stirring shaft penetrates the stirring container and is provided inside the stirring container. Inside the main body frame, the lower end of the motor shaft of the motor portion and the upper end of the stirring shaft are separated by a desired distance and are connected by the joint, and the bearing portion is provided inside the main body frame. The stirring shaft penetrates the stirring container through a seal portion, and the method includes: a first step of removing the seal portion of the stirrer provided through the stirring container from the stirring container and raising the seal portion with respect to the stirring shaft; a second step of supporting the stirring shaft by a support means at the stirring shaft below the raised seal portion on the main body frame, removing the joint between the motor shaft and the stirring shaft, and separating the motor portion and the stirring shaft; a third step of removing the bearing portion from the main body frame and removing the bearing portion and the seal portion from the upper end of the stirring shaft; a fourth step of inserting a new seal portion from the upper end of the stirring shaft, fixing it to the stirring container, inserting a new bearing portion from the upper end of the stirring shaft, and fixing the new bearing portion to the stirring shaft and the main body frame; and a fifth step of connecting the motor shaft and the stirring shaft by a joint and removing the support means from the stirring shaft and the main body frame.

Advantages of the Invention

[0032] According to the present invention, since a main body frame composed of three columns is used, a larger opening can be provided, facilitating various operations inside the frame such as replacing the bearing portion and the mechanical seal portion, and enabling the stirrer to be made more compact.

[0033] Also, when replacing the bearing part, it is not necessary to remove the main body frame or the ceiling part of the stirring container, and since the stirring shaft and the stirring blades do not move, contact damage can be prevented.

[0034] Also, it is not necessary to suspend the stirring shaft with a crane or the like, and the bearing part can be replaced.

Brief Description of the Drawings

[0035]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Modes for Carrying Out the Invention

[0036] Examples of the mode for carrying out the present invention are shown below.

Examples

[0037] Example 1 of the present invention will be described with reference to FIGS. 1 to 9.

[0038] In the present invention, the same reference numerals are given to the same parts as in the prior art, and the description thereof is omitted.

[0039] (2. Description of the main body frame)

[0040] In the present invention, instead of using the conventional main body frame 2 composed of four columns 11, as shown in FIGS. 1 and 2, for example, a main body frame 2 having a regular triangular cross-section and composed of three columns 13 spaced apart from each other at equal intervals is used.

[0041] Compared with the four rectangular columns, by configuring with three columns 13, the opening 14 between adjacent columns can be made wider. Therefore, when performing assembly work, disassembly work, etc. within the main body frame 2, various operations can be easily performed.

[0042] In addition to a regular triangular cross-section, other triangles such as an isosceles triangle may also be used.

[0043] Also, by arranging the columns 13 so that the cross-section of the main body frame 2 has, for example, the other two sides shorter than the front side, the thickness of the main body frame 2 can be reduced, and when performing operations from the front surface and the back surface simultaneously, the work becomes easier.

[0044] For example, when removing the nut on the back side from the bolt on the front side of the two-piece longitudinally split cylindrical coupling described later, since the thickness of the main body frame 2 is thin, simultaneous work on the front and back surfaces is easy, so the work becomes easier.

[0045] Also, a covering plate such as a detachable net may be fixed to each of the openings 14.

[0046] (3. Description of the two-piece longitudinally split cylindrical coupling)

[0047] Further, instead of connecting the motor shaft 5 and the stirring shaft 6 by the intermediate shaft 7a as in the conventional stirrer, as shown in FIGS. 1, 7, and 8, the lower end of the motor shaft 5 and the upper end of the stirring shaft 6 are separated by a desired distance and connected by two longitudinally split cylindrical couplings 15.

[0048] The desired distance is such that the bearing portion, the mechanical seal portion, etc. can be removed from between the lower end of the motor shaft 5 and the upper end of the stirring shaft.

[0049] The two longitudinally split cylindrical couplings 15 include a pair of semi-cylindrical bodies 15a, 15a, bolts 15b and nuts (not shown) for fixing the pair of semi-cylindrical bodies 15a, 15a combined in a cylindrical shape, and convex portions (not shown) provided on the inner peripheral surface of the semi-cylindrical body 15a and engaging with longitudinally extending recesses 5b, 6b formed in the motor shaft 5 and the stirring shaft 6, respectively.

[0050] A plurality of the bolts 15a and nuts are provided at a desired distance in the vertical direction on flange portions provided on the left and right sides of the semi-cylindrical body 15a, respectively.

[0051] Then, the pair of semi-cylindrical bodies 15a, 15a are combined in a cylindrical shape to sandwich the motor shaft 5 and the stirring shaft 6, the convex portions are engaged with the recesses 5b, 6b, and the pair of semi-cylindrical bodies 15a, 15a are fastened by the bolts 15b, so that the motor shaft 5 and the stirring shaft 6 are connected.

[0052] In the present invention, by using a frame of three columns with a wider opening and two longitudinally split cylindrical couplings 15, the removal from the stirring shaft 5 and the motor shaft 6 becomes easier at each stage compared with the prior art, and the stirrer 1 can be made compact by the main body frame 2 with three columns.

[0053] (4. Explanation of Fixing of Bearing Portion)

[0054] The bearing portion 8 press-fitted into the stirring shaft 6 may be fixed and supported, for example, not by fitting the outer ring 8a portion of the bearing portion 8 into a recess 12 formed around the edge of the through-hole 2e of the intermediate plate 2d of the main body frame 2 from above as in the prior art, but by sandwiching the outer ring 8a portion of the bearing portion 8 between the upper portion 16a and the lower portion 16b of the bearing case 16 and fixing it by screwing with a screw 16c, and fixing this bearing case 16 to the intermediate plate 2d of the main body frame 2 so that the stirring shaft 6 is supported by the main body frame 2.

[0055] (5. Description of the mechanical seal portion)

[0056] Also, as shown in FIG. 3, the mechanical seal portion 9 provided through the stirring shaft 6 is placed on the flange 3c of the neck portion 3b of the stirring container 3, and the lower flange 9a of the mechanical seal portion 9 and the split flange 17 through which the neck portion 3b of the stirring container 3 penetrates sandwich the flange 3c of the neck portion 3b, and the lower flange 9a and the split flange 17 are fastened with bolts 17a to fix the mechanical seal portion 9 to the stirring container 3.

[0057] The split flange 17 is formed by connecting two semi-circular rings.

[0058] Also, a lifting means 18 for the mechanical seal portion 9 with respect to the stirring shaft 6 may be provided.

[0059] The lifting means 18 includes, for example, as shown in FIGS. 3 and 4, a projecting piece 18b having a screw hole 18a formed to be located on the bottom plate 2b of the main body frame 2 and connected and fixed to the lower flange 9a by a screw or the like, and a bolt 18c screwed from above into the screw hole 18a.

[0060] Then, as shown in FIGS. 3 and 4, by rotating the bolt 18c so as to move it downward with respect to the protruding piece 18b, the lower end of the bolt 18c abuts against the bottom plate 2b. Further, if it is rotated so as to move downward, the bolt 18c cannot move downward while abutting against the bottom plate 2b. Therefore, the protruding piece 18b screwed to the bolt 18c moves upward with respect to the bolt 18c. As a result, the mechanical seal portion 9 fixed to the protruding piece 18b can be lifted with respect to the stirring shaft 6.

[0061] (6. Description of the stirring shaft support means)

[0062] Also, as shown in FIGS. 4 to 6, in the stirrer of the present invention, when the bearing portion 8 that supported the stirring shaft 6 on the main body frame 2 is removed from the stirring shaft 6, in order to prevent the stirring shaft 6 from falling off from the main body frame 2, a support means for fixing the stirring shaft 6 to the main body frame 2 is provided.

[0063] The support means is, for example, provided with groove portions 19 on opposite portions of the outer peripheral surface of the stirring shaft 6, respectively, and has convex portions 20a at the tip portions that can engage with the respective groove portions 19 and can support the stirring shaft 6, and at the base portion, a jig composed of a shaft fixing jig body 20 having fixing means such as screws for fixing to the main body frame 2 is provided respectively.

[0064] Then, by inserting the convex portion 20a into the groove portion 19, the vertical movement of the stirring shaft 6 with respect to the main body frame 2 is restricted.

[0065] Note that the position of the groove portion 19 formed on the outer peripheral surface of the stirring shaft is above the bottom plate 2b of the main body frame 2 (or the portion sealed by the mechanical seal portion), and is formed in a portion below the mechanical seal portion when the mechanical seal portion 9 is lifted with respect to the stirring shaft 6 before removing the bearing portion 9 from the stirring shaft 6.

[0066] (Explanation of replacement of ball bearings, etc.)

[0067] Next, the method for replacing ball bearings, etc. will be explained with respect to the agitator.

[0068] First, if necessary, remove the cover plate from the support column 13 of the main body frame 2, and open the inside of the main body frame 2 as shown in Fig. 2.

[0069] (8.1. Removal of mechanical seal part)

[0070] Next, in order to be able to remove the mechanical seal part 9 from the stirring shaft 6, as shown in Fig. 3, remove the bolt 17a from the split flange 17, separate it from the mechanical seal part 9, and then separate the split flange 17 into two parts and remove it from the neck 3b of the stirring container 3.

[0071] Then, rotate the bolt 18c screwed into the projection piece 18b fixed to the lower flange 9a of the mechanical seal part 9 so as to move downward with respect to the projection piece 18b, so that, as shown in Fig. 4, the mechanical seal part 9 is lifted relative to the stirring shaft 6 supported by the main body frame 2.

[0072] (8.2. Fixing of the stirring shaft 6 to the main body frame 2)

[0073] Next, in order to prevent the stirring shaft 6 from falling even when the bearing part 8 is removed from the stirring shaft 6, insert the convex part 20a of the shaft fixing jig main body 20 into the groove part 19 formed in the mutually facing parts of the outer peripheral surface of the stirring shaft 6, and fix the jig main body 20 to the main body frame 2, so that the stirring shaft 6 cannot move in the vertical direction with respect to the main body frame 2.

[0074] (8.3. Removal of two longitudinally split cylindrical couplings)

[0075] Next, remove the connecting bolt 15b from the two vertically split cylindrical couplings 15 that are connected, and remove the two vertically split cylindrical couplings 15 from the motor shaft 5 and the stirring shaft 6.

[0076] (8.4. Removal of the bearing part 8)

[0077] Then, as shown in FIG. 8, remove the bearing case 16 from the bearing part 8, and also raise the press-fitted bearing part 8 with respect to the stirring shaft 6 and remove it from the upper end of the stirring shaft 6.

[0078] Note that since the stirring shaft 6 is supported and fixed by the shaft fixing jig body 20, the stirring shaft 6 will not fall.

[0079] Similarly, as shown in FIG. 9, remove the mechanical seal part 9 from the upper end of the stirring shaft 6.

[0080] (8.5. Assembly of a new bearing part, etc.)

[0081] Next, as shown in FIG. 9, insert a new mechanical seal part from the upper end of the stirring shaft 6, and as shown in FIG. 8, insert a new ball bearing part 8 heated by a bearing warmer or the like from the upper end of the stirring shaft 6, and then press-fit and cool it at a desired position of the stirring shaft 6 to fix the ball bearing part 8 to the stirring shaft 6.

[0082] Then, attach the bearing case 16 to the ball bearing part 8 and fix the bearing case 16 to the intermediate plate 2d of the main body case 2.

[0083] Thereby, the stirring shaft 6 comes to be supported by the main body frame 2.

[0084] Also, attach two vertically split cylindrical couplings to the motor shaft 5 and the stirring shaft 6 to connect the motor shaft 5 and the stirring shaft 6.

[0085] Next, remove the shaft fixing jig body 20 from the stirring shaft 6 and the main body frame 2.

[0086] Note that since the stirring shaft 6 is supported by the main body frame 2 by the bearing portion 8, it will not fall.

[0087] Next, as shown in FIG. 3, place the mechanical seal portion 9 on the upper end of the flange 3c of the neck portion 3b of the stirring container 3, attach the split flange 17 to the neck portion 3b, and use the lower flange 9a of the mechanical seal portion 9 and the split flange 17 provided to penetrate the neck portion 3b of the stirring container 3 to sandwich the flange 3c of the neck portion 3b, tighten the bolt 17a, and fix the mechanical seal portion 9 to the stirring container 3.

[0088] Then, if necessary, by fixing a closing plate between adjacent support columns, it becomes possible to complete the replacement of bearings and the like.

[0089] Note that the order of removal, attachment, etc. of the bearing portion 8, the mechanical seal portion 9, etc. may be different as long as it does not deviate from the gist of the present invention.

[0090] According to the present invention, since the main body frame 2 composed of three support columns 13 is used, the opening can be made large, so that various operations within the frame such as replacing the bearing portion 8 and the mechanical seal portion 9 can be facilitated, and the stirrer can be made compact.

[0091] Also, when replacing the bearing portion, it is not necessary to remove the main body frame or the ceiling portion of the stirring container, and since the stirring shaft and the stirring blades do not move, contact damage can be prevented.

[0092] Also, it is not necessary to suspend the stirring shaft with a crane or the like, and the bearing portion can be replaced.

Explanation of Reference Numerals

[0093] 1 Stirrer 2 Body Frame 2a Ceiling Plate 2b Bottom Plate 2c Through-Hole 2d Intermediate Plate 2e Through-Hole 3 Stirring Container 3a Ceiling Portion 3b Head 3c Flange 4 Motor Section 4a Reducer 5 Motor Shaft 5a Lower Flange 5b Recess 6 Stirring Shaft 6a Upper Flange 6b Recess 7 Shaft Joint 7a Intermediate Shaft 7b Upper Flange 7c Lower Flange 8 Bearing Section 8a Outer Ring 8b Inner Ring 9 Mechanical Seal Section 9a Lower Flange 9b Mechanical Cover 10 Bolt 11 Support Pillar 11a Opening 12 Recess 13 Support Pillar 14 Opening 15 Two-Piece Split Cylindrical Coupling 15a Half Cylinder 15b Bolt 16 Bearing Case 16a Upper Part 16b Lower Part 16c Screw 17 Split Flange 17a Bolt 18 Lifting Means 18a Screw Hole 18b Projection 18c Bolt 19 Groove 20 Shaft fixing jig body 20a Protrusion

Claims

1. A main body frame fixed to the outside of the stirring container, comprising a ceiling plate, a bottom plate, and three spaced-apart columns connecting the ceiling plate and the bottom plate; A motor unit fixed to the main body frame; A stirring shaft having stirring means at the lower part, which is connected to the motor unit via a joint and is rotatably supported by a bearing unit fixed to the main body frame; The lower part of the stirring shaft penetrates the stirring container and is provided in the stirring container; In the main body frame, the lower end of the motor shaft of the motor unit and the upper end of the stirring shaft are spaced apart by a desired distance and are connected by the joint, and the bearing unit is provided in the main body frame. A stirrer characterized by this.

2. The stirrer according to claim 1, wherein the stirring shaft penetrates the stirring container via a seal portion.

3. A main body frame fixed to the outside of the stirring container, comprising a ceiling plate, a bottom plate, and a column connecting the ceiling plate and the bottom plate; a motor unit fixed to the upper part of the main body frame; and a joint connected to the motor unit. A stirring shaft having stirring means at the lower part, which is rotatably supported by a bearing unit fixed to the main body frame. The lower part of the stirring shaft penetrates the stirring container and is provided in the stirring container. In the main body frame, the lower end of the motor shaft of the motor unit and the upper end of the stirring shaft are spaced apart by a desired distance and are connected by the joint, and the bearing unit is provided in the main body frame. When replacing the bearing unit from the stirrer A jig for use when replacing the bearing unit from a stirrer, characterized in that the stirring shaft is composed of a support means used to support the stirring shaft on the main body frame when replacing the bearing unit from the stirrer.

4. The jig for use when replacing the bearing unit from the stirrer according to claim 3, wherein the support means is a shaft support jig body fixed to the main body frame, which has a convex portion engaged with a groove portion provided on the stirring shaft and supports the stirring shaft.

5. A main body frame fixed to the outside of a stirring container, comprising a ceiling plate, a bottom plate, and columns connecting the ceiling plate and the bottom plate; a motor unit fixed to the upper part of the main body frame; and a stirring shaft having stirring means at the lower part, which is connected to the motor unit via a joint and is rotatably supported by a bearing unit fixed to the main body frame. The lower part of the stirring shaft penetrates the stirring container and is provided inside the stirring container. Inside the main body frame, the lower end of the motor shaft of the motor unit and the upper end of the stirring shaft are separated by a desired distance and are connected by the joint, and a bearing unit is provided inside the main body frame of the stirrer A first step of supporting the stirring shaft on the main body frame by a supporting means, removing the joint between the motor shaft and the stirring shaft, and separating the motor unit and the stirring shaft A second step of removing the bearing unit from the main body frame and removing it from the upper end of the stirring shaft A third step of inserting a new bearing unit into the upper end of the stirring shaft and fixing the new bearing unit to the stirring shaft and the main body frame A method for replacing a bearing unit of a stirrer, comprising a fourth step of connecting the motor shaft and the stirring shaft by a joint and removing the supporting means from the stirring shaft and the main body frame

6. A main body frame fixed to the outside of a stirring container, comprising a ceiling plate, a bottom plate, and columns connecting the ceiling plate and the bottom plate; a motor unit fixed to the upper part of the main body frame; and a stirring shaft having stirring means at the lower part, which is connected to the motor unit via a joint and is rotatably supported by a bearing unit fixed to the main body frame. The lower part of the stirring shaft penetrates the stirring container and is provided inside the stirring container. Inside the main body frame, the lower end of the motor shaft of the motor unit and the upper end of the stirring shaft are separated by a desired distance and are connected by the joint, and a bearing unit is provided inside the main body frame. The stirring shaft penetrates the stirring container via a seal part of the stirrer A first step of removing the seal part from the stirring container and raising the seal part with respect to the stirring shaft In a second step, the stirring shaft is supported by a supporting means on the main body frame at the stirring shaft below the raised seal portion, the joint between the motor shaft and the stirring shaft is removed, and the motor portion and the stirring shaft are separated. In a third step, the bearing portion is removed from the main body frame, and the bearing portion and the seal portion are removed from the upper end of the stirring shaft. In a fourth step, a new seal portion is inserted from the upper end of the stirring shaft and fixed to the stirring container, and a new bearing portion is inserted from the upper end of the stirring shaft and fixed to the stirring shaft and the main body frame. A method for replacing a bearing portion of a stirrer, comprising a fifth step of connecting the motor shaft and the stirring shaft by a joint and removing the supporting means from the stirring shaft and the main body frame.

Images