Stirring rack

Abstract

The utility model discloses a stirring rack which comprises a rack base and a rack body, the rack body is fixedly installed on the rack base, a first transmission fulcrum and a second transmission fulcrum are installed on the rack body, and the first transmission fulcrum and the second transmission fulcrum are in transmission connection with a stirring main shaft. The first transmission fulcrum and the second transmission fulcrum are arranged and installed in the length direction of the stirring main shaft, the first transmission fulcrum is arranged above the second transmission fulcrum, a conical head is arranged at one end of the stirring main shaft, and the stirring main shaft is in taper connection with the first transmission fulcrum through the conical head. The transmission stability is obviously improved, the stirring main shaft adopts taper connection so as to solve the problems of large abrasion of the shaft sleeve and shaking of the main shaft, and the rack is provided with three sealing structures, so that excellent effects of preventing liquid from overflowing and preventing air from entering can be formed.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical reaction kettle equipment, and more specifically, to a mixing machine frame. Background Art

[0002] In the process of preparing lithium battery precursor materials by wet coprecipitation reaction, the reactor is a necessary production equipment. The reactor currently used by the enterprise is a conventional reactor equipment, which is characterized by the single-point support of the stirring spindle, the support of the stirring spindle in the sleeve is provided by the roundness of the shaft and the hole, and the kettle body is sealed only by a water seal. During the production and use of the company's existing reactors, it was found that the above-mentioned single-point support structure has the problem of lack of stability. Due to the large overturning moment of the paddle blades at the bottom of the main shaft during stirring operation, the wear problem between the stirring main shaft and the shaft sleeve is relatively serious, a gap is easily generated between the stirring main shaft and the shaft sleeve, and the shaking problem of the stirring main shaft during operation is obvious. The shaking of the stirring main shaft not only makes the filling coefficient of the reactor tank body lower (the waves caused by the shaking are high during stirring, and in order to prevent liquid overflow, the liquid level in the tank can only be lowered), but also causes water seal failure (the shaking of the stirring main shaft is large, which will dry the sealing water in the water seal. At this time, the water seal will fail, and the positive pressure gas environment in the kettle will be connected to the external environment), resulting in ammonia overflow and increased consumption of protective gas nitrogen. In severe cases, production failures may occur, affecting the quality of the finished products. Therefore, the design improvement of the mixer frame structure is a key project of the company's technical transformation research, and this case was born. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art and to provide a mixing machine frame. The mixing main shaft is installed with two-point support, and the transmission stability is significantly improved. The mixing main shaft adopts a tapered connection to solve the problems of large sleeve wear and main shaft shaking. The machine frame is arranged with a three-sealing structure, which can form an excellent effect of preventing liquid overflow and air ingress.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A mixing machine frame, used for installing a mixing spindle, comprises a frame base and a frame body, wherein the frame body is fixedly installed on the frame base, the frame body is installed with a first transmission fulcrum and a second transmission fulcrum, the first transmission fulcrum and the second transmission fulcrum are transmission-connected with the mixing spindle, the first transmission fulcrum and the second transmission fulcrum are arranged and installed along the length direction of the mixing spindle, the first transmission fulcrum is arranged above the second transmission fulcrum, a conical head is provided at one end of the mixing spindle, and the mixing spindle forms a conical connection with the first transmission fulcrum through the conical head.

[0006] Furthermore, the first transmission fulcrum includes a sleeve and a first bearing seat, two first bearings are installed on the outer wall of the sleeve, a nut is threadedly installed on the sleeve, the first bearing is pressed and fixed by the nut, the first bearing seat is fixedly installed on the top of the frame body, the sleeve and the first bearing are combined as a whole and installed in the first bearing seat, the stirring shaft is installed through the sleeve, a nut is threadedly installed on the stirring shaft, and the stirring shaft is locked and connected to the sleeve through the nut.

[0007] Furthermore, the shaft sleeve is provided with a tapered shaft mounting hole, and the size of the tapered head matches the tapered shaft mounting hole.

[0008] Furthermore, a spacer sleeve is installed between the two first bearings, and the spacer sleeve includes an inner ring and an outer ring, and the thickness of the inner ring is greater than the thickness of the outer ring.

[0009] Furthermore, the second transmission fulcrum includes a second bearing seat and a second bearing, the second bearing seat is fixedly installed in the middle of the frame body, the second bearing is installed in the second bearing seat, the inner ring of the second bearing is installed with a tightening sleeve, the stirring main shaft is installed through the tightening sleeve, and the second bearing is connected to the stirring main shaft through the tightening sleeve.

[0010] Furthermore, a mechanical seal, a labyrinth seal and an umbrella seal are installed along the length direction of the stirring main shaft, and the stirring main shaft is installed through the mechanical seal, the labyrinth seal and the umbrella seal.

[0011] Furthermore, the labyrinth seal includes a lower sealing seat and an upper sealing seat, the lower sealing seat is fixedly installed on the frame base, the upper sealing seat is fixedly installed on the outer wall of the stirring shaft, the lower sealing seat is provided with a plurality of raised lip rings, and the upper sealing seat is provided with a plurality of lip grooves, the lip grooves are arranged in one-to-one correspondence with the lip rings, and the lip rings are embedded in the corresponding lip grooves.

[0012] Furthermore, there is a height difference between adjacent lip rings, and a plurality of lip rings are gradually raised toward the center of the lower sealing seat.

[0013] Furthermore, the umbrella-shaped seal is installed below the labyrinth seal, a pipe sleeve is installed on the frame base, the umbrella-shaped seal includes an umbrella sleeve and an umbrella lip, the umbrella sleeve is fixedly installed on the outer wall of the stirring main shaft, the umbrella lip is connected to the outer wall of the umbrella sleeve, the umbrella lip is installed tilted downward, there is a gap between the outer edge of the umbrella lip and the inner hole of the pipe sleeve, the number of the umbrella lips is at least one, and the umbrella lips are arranged along the length direction of the umbrella sleeve.

[0014] Furthermore, a short section seat is pressed and installed on the lower sealing seat, and the mechanical seal is installed on the top of the short section seat. The mechanical seal forms a sealing effect on the outer wall of the stirring shaft. The mechanical seal is arranged above the labyrinth seal, and a gap is formed between the mechanical seal and the labyrinth seal.

[0015] The beneficial effects of the utility model are:

[0016] 1. The stirring main shaft forms a two-point transmission support through the first transmission fulcrum and the second transmission fulcrum, which can significantly improve the transmission stability of the main shaft. The sleeve of the first transmission fulcrum is provided with a tapered shaft mounting hole. The main shaft and the sleeve are connected by a taper. A round nut with a counterclockwise thread is installed on the main shaft. As the stirring operation proceeds, the round nut will become tighter and tighter. Under such a structure, the connection between the main shaft and the sleeve is reliable and not easy to wear. It not only solves the problem of main shaft shaking caused by sleeve wear, but also solves the problem of main shaft falling caused by loose round nuts.

[0017] 2. Mechanical seal, labyrinth seal and umbrella seal can form a three-layer sealing effect. The labyrinth seal and umbrella seal can effectively block water, prevent the liquid in the tank from overflowing, and improve the filling coefficient of the kettle. The mechanical seal can prevent the air environment inside and outside the kettle from being connected, and can prevent the outside air from entering the kettle to cause oxidation of the material, which can improve product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure in which a stirring frame is installed on a reaction kettle in this embodiment;

[0019] Figure 2 is a structural schematic diagram of a mixing machine frame in this embodiment;

[0020] Figure 3 for Figure 2 A magnified view of the position in the figure;

[0021] Figure 4 for Figure 2 A magnified view of point B in FIG.

[0022] Figure 5 for Figure 2 Enlarged view at C in the figure.

[0023] Figure numerals: frame base 1, pipe sleeve 11, frame body 2, first transmission fulcrum 3, sleeve 31, tapered shaft hole 311, first bearing 32, nut 33, first bearing seat 34, spacer sleeve 35, inner ring 351, outer ring 352, second transmission fulcrum 4, second bearing seat 41, second bearing 42, adapter sleeve 43, mechanical seal 5, short section seat 51, labyrinth seal 6, lower sealing seat 61, lip ring 611, upper sealing seat 62, lip groove 621, umbrella seal 7, umbrella sleeve 71, umbrella lip 72, reactor 100, stirring spindle 200, conical head 201. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The stirring spindle 200 is an important operating component of the reactor 100. Figure 1-5 The stirring frame shown is used for installing the stirring main shaft 200, including a frame base 1 and a frame body 2, the frame base 1 is fixedly installed on the top of the reactor 100, the frame body 2 is fixedly installed on the frame base 1, the frame body 2 is installed with a first transmission fulcrum 3 and a second transmission fulcrum 4, the first transmission fulcrum 3 and the second transmission fulcrum 4 are connected to the stirring main shaft 200 by transmission, the first transmission fulcrum 3 and the second transmission fulcrum 4 are arranged and installed along the length direction of the stirring main shaft 200, the first transmission fulcrum 3 and the second transmission fulcrum 4 can form a two-point support effect on the stirring main shaft 200, compared with the single-point support of the traditional reactor, the two-point support structure is more stable and can improve the grinding In order to prevent damage and shaking, the first transmission fulcrum 3 is arranged above the second transmission fulcrum 4, and a conical head 201 is arranged at one end of the stirring main shaft 200. The stirring main shaft 200 forms a conical connection with the first transmission fulcrum 3 through the conical head 201. The stirring main shaft 200 is installed from bottom to top, and the stirring main shaft 200 passes through the second transmission fulcrum 4 and then forms a conical connection with the first transmission fulcrum 3. The conical connection can increase the connection reliability. Compared with the traditional shaft and hole roundness matching connection, the fit between the shaft surface and the hole surface is better, and wear is not easy to occur during the rotation operation of the stirring main shaft 200. The above-mentioned two-fulcrum structure of the utility model can significantly improve the transmission stability of the stirring main shaft 200.

[0026] like Figure 2 and Figure 3As shown, the first transmission fulcrum 3 includes a sleeve 31 and a first bearing seat 34. Two first bearings 32 are installed on the outer wall of the sleeve 31. A nut 33 is threadedly installed on the sleeve 31. The first bearing 32 is pressed and fixed by the nut 33. The first bearing seat 34 is fixedly installed on the top of the frame body 2. The sleeve 31 and the first bearing 32 are combined into a whole and installed in the first bearing seat 34. The sleeve 31 is provided with a tapered shaft hole 311. The stirring spindle 200 is installed through the sleeve 31. The size of the tapered head 201 of the stirring spindle 200 matches the tapered shaft hole 311. When the stirring spindle 200 is installed, the tapered head 201 is used to 1 is inserted upward, and the conical head 201 is just matched and inserted into the conical shaft hole 311. The stirring main shaft 200 is threadedly installed with a nut 33, and the stirring main shaft 200 is locked and connected with the sleeve 31 through the nut. The nut 33 adopts a counterclockwise thread, and the stirring main shaft 200 rotates clockwise when it is in operation. Since the nut 33 is a counterclockwise thread, the nut 33 is tightened more and more when the stirring main shaft 200 is in operation, so that the stirring main shaft 200 will not fall off due to the loosening of the nut 33. Moreover, since the nut 33 is tightened more and more, the outer wall of the stirring main shaft 200 can always maintain contact with the inner wall of the sleeve 31. The close fit between the main shaft 200 and the shaft sleeve 31 greatly reduces the wear probability of the shaft sleeve 31 when there is no joint gap. The reduction in the wear probability can not only extend the service life of the shaft sleeve 31, but also effectively suppress the shaking of the stirring main shaft 200, which has a positive positive use effect. When the stirring main shaft 200 and the shaft sleeve 31 are connected with a taper, it is also convenient to assemble and disassemble the stirring main shaft 200. When assembling, you only need to tighten the nut 33 to tighten the stirring main shaft 200 and the shaft sleeve 31, which is very convenient. When disassembling, you only need to knock on the top of the stirring main shaft 200 to quickly separate the stirring main shaft 200 and the shaft sleeve 31, which is also very convenient. For convenience, the two first bearings 32 are both tapered roller bearings, and the two first bearings 32 are installed in a back-to-back configuration. The tapered roller bearings installed in a back-to-back configuration can form a good centering effect on the stirring main shaft 200, and can play a positive role in reducing the stirring main shaft 200. A spacer sleeve 35 is installed between the two first bearings 32. The spacer sleeve 35 includes an inner ring 351 and an outer ring 352. The thickness of the inner ring 351 is greater than the thickness of the outer ring 352. Generally, the thickness of the inner ring 351 is slightly greater than the thickness of the outer ring 352 by 0.03 mm. This can not only ensure the clearance between the bearings, but also be beneficial to the embodiment of the bearing centering effect.

[0027] like Figure 2 and Figure 4As shown, the second transmission fulcrum 4 includes a second bearing seat 41 and a second bearing 42. The second bearing seat 41 is fixedly installed in the middle of the frame body 2, and the second bearing 42 is installed in the second bearing seat 41. The second bearing 42 adopts a spherical roller bearing. The inner ring of the second bearing 42 is equipped with a tightening sleeve 43. The stirring main shaft 200 is installed through the tightening sleeve 43. The second bearing 42 is connected to the stirring main shaft 200 through the tightening sleeve 43. The second transmission fulcrum 4 is arranged below the first transmission fulcrum 3. A large gap is left between the second transmission fulcrum 4 and the first transmission fulcrum 3, which is conducive to lengthening the support point spacing of the stirring main shaft 200. When the stirring main shaft 200 is supported at two points, the movement stability is greatly enhanced, and the shaking problem of the stirring main shaft 200 is effectively solved. Since the shaking problem of the stirring main shaft 200 is solved, the stirring waves in the reactor 100 will also be significantly reduced, so that more raw materials can be loaded during operation, and the filling system of the reactor 100 is significantly improved.

[0028] Since the water seal in the existing reactor 100 is unreliable and prone to failure, the utility model also makes corresponding improvements to the sealing structure, such as Figure 2 As shown, a mechanical seal 5, a labyrinth seal 6 and an umbrella seal 7 are installed along the length direction of the stirring main shaft 200. The stirring main shaft 200 is installed through the mechanical seal 5, the labyrinth seal 6 and the umbrella seal 7. The mechanical seal 5, the labyrinth seal 6 and the umbrella seal 7 can form a three-line sealing effect on the installation position of the stirring main shaft 200 at the top of the reactor 100, which can significantly improve the sealing quality and solve a series of problems such as ammonia overflow, liquid overflow, and air connection between the inside and outside of the reactor. The mechanical seal 5, the labyrinth seal 6 and the umbrella seal 7 are installed on the inner side of the frame body 2, and are all arranged below the second transmission fulcrum 4.

[0029] like Figure 5As shown, the labyrinth seal 6 includes a lower sealing seat 61 and an upper sealing seat 62. The lower sealing seat 61 is fixedly mounted on the frame base 1 to form a sealing effect on the top opening of the reactor 100. The upper sealing seat 62 is fixedly mounted on the outer wall of the stirring main shaft 200 and can rotate with the stirring main shaft 200. The lower sealing seat 61 is provided with a plurality of raised lip rings 611, and the upper sealing seat 62 is provided with a plurality of lip grooves 621. The lip grooves 621 are arranged one by one with the lip rings 611. The lip rings 611 are embedded in the corresponding lip grooves 621. The embedded structure of the lip rings 611 and the lip grooves 621 can form a labyrinth passage. The path is arranged behind multiple groups of lip rings 611 and lip grooves 621, and the stroke in the labyrinth channel is lengthened, which can prevent the overflow of liquid to a limited extent. The cooperation between the lip grooves 621 and the lip rings 611 can also form a centering effect, which has a positive effect on solving the shaking problem of the stirring main shaft 200. There is a height difference between adjacent lip rings 611, and several lip rings 611 are gradually raised toward the center of the lower sealing seat 61. The advantage of this design is that even if liquid is thrown into the labyrinth seal 6, it is guided downward to flow, and the liquid will no longer be thrown up, which is beneficial to protecting the mechanical seal 5 above the labyrinth seal 6.

[0030] like Figure 5 As shown, the umbrella seal 7 is installed below the labyrinth seal 6. When the liquid spray is thrown high, the umbrella seal 7 first plays a sealing effect, and cooperates with the labyrinth seal 6 to solve the problem of liquid overflow. The frame base 1 is installed with a pipe sleeve 11, and the pipe sleeve 11 is inserted into the reactor 100. The umbrella seal 7 includes an umbrella sleeve 71 and an umbrella lip 72. The umbrella sleeve 71 is fixedly installed on the outer wall of the stirring main shaft 200. The umbrella seal 7 can rotate with the stirring main shaft 200. The umbrella lip 72 is connected to the outer wall of the umbrella sleeve 71. The umbrella lip 72 is a full circle, which can block the spray. In order to effect the upward movement of the liquid, the lip 72 is installed tilted downward, so that the liquid thrown high up hits the lip 72 and can be blocked, and can also naturally fall along the inclined surface of the lip 72 after being blocked. There is a gap between the outer edge of the lip 72 and the inner hole of the pipe sleeve 11. This design does not affect the rotation of the umbrella seal 7 with the stirring main shaft 200. The number of lip 72 is at least one, preferably 2-3. The lip 72 is arranged along the length direction of the umbrella sleeve 71. In the case of multiple lips 72, a better water retaining effect can be formed, which can reduce the pressure of the labyrinth seal 6.

[0031] like Figure 2As shown, a short joint seat 51 is pressed and installed on the lower sealing seat 61, and the short joint seat 51 is sealed and connected to the lower sealing seat 61. The mechanical seal 5 is bolted and installed on the top of the short joint seat 51, and the mechanical seal 5 is sealed and connected to the short joint seat 51. The mechanical seal 5 is a finished product purchased from the market. The mechanical seal 5 has a good axial sealing effect. The mechanical seal 5 can form a sealing effect on the outer wall of the stirring main shaft 200. The mechanical seal 5 is used to solve the problem of ammonia overflow and air connection between the inside and outside of the kettle. The mechanical seal 5 cannot be used to block the liquid in the kettle. The liquid in the kettle contacts the mechanical seal 5, which will cause the mechanical seal 5 to be damaged and fail. Therefore, the mechanical seal 5 is arranged above the labyrinth seal 6, and a gap is formed between the mechanical seal 5 and the labyrinth seal 6 to ensure that the liquid in the kettle will not contact the mechanical seal 5.

[0032] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A mixing machine frame, used for installing a mixing spindle (200), characterized in that: The invention comprises a frame base (1) and a frame body (2), wherein the frame body (2) is fixedly mounted on the frame base (1), and the frame body (2) is provided with a first transmission fulcrum (3) and a second transmission fulcrum (4), wherein the first transmission fulcrum (3) and the second transmission fulcrum (4) are transmission-connected to a stirring main shaft (200), and the first transmission fulcrum (3) and the second transmission fulcrum (4) are arranged and mounted along the length direction of the stirring main shaft (200), and the first transmission fulcrum (3) is arranged above the second transmission fulcrum (4), and a conical head (201) is provided at one end of the stirring main shaft (200), and the stirring main shaft (200) is connected to the first transmission fulcrum (3) in a conical manner through the conical head (201).

2. A mixer stand according to claim 1, characterized in that: The first transmission fulcrum (3) comprises a shaft sleeve (31) and a first bearing seat (34); two first bearings (32) are installed on the outer wall of the shaft sleeve (31); a nut (33) is threadedly installed on the shaft sleeve (31); the first bearings (32) are pressed and fixed by the nut (33); the first bearing seat (34) is fixedly installed on the top of the frame body (2); the shaft sleeve (31) and the first bearing (32) are installed in the first bearing seat (34); the stirring main shaft (200) passes through the shaft sleeve (31) for installation; the stirring main shaft (200) is threadedly installed with a nut (33); the stirring main shaft (200) is locked and connected to the shaft sleeve (31) by the nut.

3. A mixer frame according to claim 2, characterized in that: The shaft sleeve (31) is provided with a tapered shaft mounting hole (311), and the size of the tapered head (201) matches the tapered shaft mounting hole (311).

4. A mixer frame according to claim 2, characterized in that: A spacer sleeve (35) is installed between the two first bearings (32), and the spacer sleeve (35) comprises an inner ring (351) and an outer ring (352), and the thickness of the inner ring (351) is greater than the thickness of the outer ring (352).

5. A mixer frame according to claim 1, characterized in that: The second transmission fulcrum (4) comprises a second bearing seat (41) and a second bearing (42); the second bearing seat (41) is fixedly mounted in the middle of the frame body (2); the second bearing (42) is mounted in the second bearing seat (41); a tightening sleeve (43) is mounted on the inner ring of the second bearing (42); the stirring main shaft (200) passes through the tightening sleeve (43) for installation; and the second bearing (42) is connected to the stirring main shaft (200) via the tightening sleeve (43).

6. A mixer frame according to claim 1, characterized in that: A mechanical seal (5), a labyrinth seal (6) and an umbrella seal (7) are installed along the length direction of the stirring main shaft (200), and the stirring main shaft (200) is installed by penetrating the mechanical seal (5), the labyrinth seal (6) and the umbrella seal (7).

7. A mixer frame according to claim 6, characterized in that: The labyrinth seal (6) comprises a lower sealing seat (61) and an upper sealing seat (62); the lower sealing seat (61) is fixedly mounted on the frame base (1); the upper sealing seat (62) is fixedly mounted on the outer wall of the stirring main shaft (200); the lower sealing seat (61) is provided with a plurality of raised lip rings (611); the upper sealing seat (62) is provided with a plurality of lip grooves (621); the lip grooves (621) are arranged in a one-to-one correspondence with the lip rings (611); and the lip rings (611) are embedded in the corresponding lip grooves (621).

8. A mixer frame according to claim 7, characterized in that: There is a height difference between adjacent lip rings (611), and a plurality of lip rings (611) are gradually raised toward the center of the lower sealing seat (61).

9. A mixer frame according to claim 6, characterized in that: The umbrella seal (7) is installed below the labyrinth seal (6); the frame base (1) is installed with a pipe sleeve (11); the umbrella seal (7) comprises an umbrella sleeve (71) and an umbrella lip (72); the umbrella sleeve (71) is fixedly installed on the outer wall of the stirring main shaft (200); the umbrella lip (72) is connected to the outer wall of the umbrella sleeve (71); the umbrella lip (72) is installed in a downwardly inclined manner; there is a gap between the outer edge of the umbrella lip (72) and the inner hole of the pipe sleeve (11); the number of the umbrella lip (72) is at least one; and the umbrella lip (72) is arranged along the length direction of the umbrella sleeve (71).

10. A mixer frame according to claim 7, characterized in that: A short section seat (51) is pressed and installed on the lower sealing seat (61), and the mechanical seal (5) is installed on the top of the short section seat (51). The mechanical seal (5) forms a sealing effect on the outer wall of the stirring main shaft (200). The mechanical seal (5) is arranged above the labyrinth seal (6), and a gap is formed between the mechanical seal (5) and the labyrinth seal (6).

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