A double push-inclined plug type stirring structure for a pulp chest

Abstract

The utility model discloses a double push inclined insertion formula stirring structure for pulp pool, including the one pair of frame (1) of setting in the pulp pool outer edge and the circumferential symmetry, is equipped with motor (2) on the frame (1), its characterized in that: the bottom of frame (1) is equipped with a plurality of bearing seat (3), be equipped with the main shaft (25) in bearing seat (3), the output end of motor (2) is connected with the one end of main shaft (25) through belt drive, one end of main shaft (25) is equipped with paddle (4), and main shaft (25) has sleeve machine seal (5). The utility model discloses through the two sides paddle of circumferential symmetry and obliquely extend into the pulp pool, can produce radial and axial thrust simultaneously when rotating, form three -dimensional intersection's slurry flow field, improve the uniformity of mixing.

Description

Technical Field

[0001] This utility model relates to slurry pump equipment, and in particular to a double-push inclined insertion stirring structure for slurry tanks. Background Technology

[0002] To ensure the pulp in the pulp tank remains suspended and of uniform concentration during circulation, agitators are installed within the pulp tank. For example, Chinese utility model patent CN219232089U discloses a pulp mixing tank agitator, which includes a hollow tank. A servo motor is located at the top of the tank, and the output end of the servo motor extends through the top of the tank and has a mixing structure at its end. The mixing structure includes a connecting shaft located at the output end of the servo motor, a rotating rod at the bottom of the connecting shaft, a first mixing blade below the rotating rod, and a scraping structure on the surface of the connecting shaft. This type of agitator has the following problems: 1. This type of agitator is used individually. Although the obliquely inserted single blade can generate inclined flow, only a single circulation path is formed within the tank, and mixing blind spots easily appear in corner areas; 2. The vertically installed blades of the agitator mainly generate unidirectional axial or radial flow, which easily leads to a stratification phenomenon of "swirl at the top and sedimentation at the bottom" in deep or wide tanks. Utility Model Content

[0003] The purpose of this invention is to provide a double-push oblique insertion stirring structure for a slurry tank. This invention uses circumferentially symmetrical blades that extend obliquely into the slurry tank. During rotation, they simultaneously generate radial and axial thrust, forming a three-dimensional intersecting slurry flow field, thus improving the uniformity of mixing.

[0004] The technical solution of the present invention is as follows: A double-push oblique insertion stirring structure for a slurry tank includes a pair of frames arranged circumferentially symmetrically along the outer edge of the slurry tank, with a motor mounted on the frames. The structure is characterized in that: multiple bearing seats are provided at the bottom of the frames, and a main shaft is housed within each bearing seat; the output end of the motor is connected to one end of the main shaft via belt drive; one end of the main shaft is provided with a blade, and a mechanical seal is fitted onto the main shaft; a flange seat connected to the side of the slurry tank is provided on the outer side of the mechanical seal, and a blade passes through the flange seat; the inner end of the blade is fixedly connected to the main shaft, and the blades on both sides extend obliquely into the slurry tank; a packing assembly is provided on the inner side of the mechanical seal, which fits against the outer circular surface of the main shaft.

[0005] In the above-mentioned double-push inclined insertion stirring structure for slurry tank, the frame is provided with a stud, the stud is provided with a motor pad, and multiple nuts are fitted on the stud, which are respectively in close contact with the upper and lower surfaces of the motor pad. The motor is mounted on the motor pad.

[0006] In the aforementioned double-push inclined insertion stirring structure for slurry tank, the bearing seat includes a seat body connected to the bottom of the frame, a bearing is provided in the seat body, the main shaft passes through the bearing, and a bearing positioning sleeve is also provided on the main shaft, with one end of the bearing positioning sleeve tightly attached to the bearing; both ends of the seat body have felt rings that fit against the outer circle of the main shaft.

[0007] In the aforementioned double-push inclined insertion stirring structure for the slurry tank, a shaft protection cover for covering the main shaft is provided at the lower part of the frame and between the bearing seats, and a sealing protection cover for covering the main shaft is provided at the lower part of the frame and between the bearing seats and the packing assembly.

[0008] In the aforementioned double-push inclined insertion stirring structure for a slurry tank, the impeller includes a hub connected to the main shaft via a flat key structure, with multiple blades evenly arranged on the outer side of the hub, and a hub end cap provided at the outer end of the hub.

[0009] In the aforementioned double-push inclined insertion stirring structure for slurry tank, the packing assembly includes a packing seat connected to a mechanical seal, a packing gland at one end of the packing seat, a packing ring that fits against the main shaft inside the packing seat, and a packing layer between the packing ring and the packing seat; the packing seat has sealing rings at both ends that fit against the main shaft.

[0010] Compared with the prior art, the present invention has the following advantages:

[0011] 1. In this utility model, the flange seat is connected to the side of the slurry tank. After installation, the motor output power is used to make the shaft rotate through belt drive, which drives the blade to rotate. The blade is arranged in a circumferentially symmetrical form on both sides of the slurry tank. The blades on both sides of the circumferentially symmetrical form extend obliquely into the slurry tank. When rotating, it can generate radial and axial thrust at the same time, forming a three-dimensional cross slurry flow field, avoiding blind spots of unidirectional stirring, and improving the uniformity of slurry mixing.

[0012] 2. Install shaft protection covers and sealing covers to evenly seal and cover the gap between the shaft and the components, reducing dust and impurities from entering through the connection gap and increasing wear during spindle rotation.

[0013] 3. The packing assembly, through the set packing layer and packing ring, prevents slurry leakage and impurity intrusion, while also assisting in supporting the main shaft, reducing operational wear, and ensuring stable and reliable operation of the agitator in complex environments such as pulp tanks. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the packing assembly;

[0016] Figure 3This is a schematic diagram of the bearing housing;

[0017] Figure 4 This is a schematic diagram showing the installation location of the twin propeller blades;

[0018] Figure 5 This is a schematic diagram showing the direction of fluid flow within the slurry tank.

[0019] The markings in the attached diagram are as follows: 1-Frame, 2-Motor, 3-Bearing housing, 4-Blade, 5-Mechanical seal, 6-Flange seat, 7-Packaging assembly, 8-Stud, 9-Motor gasket, 10-Nut, 11-Base, 12-Bearing, 13-Bearing positioning sleeve, 14-Felt ring, 15-Shaft protection cover, 16-Sealing protection cover, 17-Hub, 18-Blade, 19-Hub end cover, 20-Packaging seat, 21-Packaging gland, 22-Packaging ring, 23-Packaging layer, 24-Sealing ring, 25-Main shaft. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0021] Example: A double-push inclined insertion stirring structure for a slurry tank, comprising a pair of frames 1 arranged circumferentially symmetrically along the outer edge of the slurry tank, as shown in the attached figure. Figure 1 As shown, a motor 2 is mounted on a frame 1. A stud 8 is provided on the frame 1, and a motor 2 pad is mounted on the stud 8. Multiple nuts 10 are fitted onto the stud 8, with each nut 10 tightly abutting the upper and lower surfaces of the motor 2 pad. The motor 2 is positioned on the motor 2 pad. Flexible support and precise adjustment ensure the stability of the motor installation and the coaxiality of the transmission system. The position of the motor pad can be moved on the stud, thereby adjusting the height of the motor. After determining the position of the motor pad, the nuts on the upper and lower sides of the motor pad are rotated to fit against the plate. Using a motor pad also has the advantage of vibration isolation; the motor pad can absorb most high-frequency vibrations, generating resonance and reducing noise. Multiple bearing seats 3 are mounted at the bottom of the frame 1. A main shaft 25 is installed inside the bearing seat 3. The main shaft is a stepped shaft. The bearing seat 3 includes a base 11 connected to the bottom of the frame 1, as shown in the attached figure. Figure 3As shown, a bearing 12 is installed inside the base 11, and the main shaft 25 passes through the bearing 12. A bearing positioning sleeve 13 is also installed on the main shaft 25, with one end of the bearing positioning sleeve 13 tightly attached to the bearing 12. Both ends of the base 11 have felt rings 14 that fit against the outer circle of the main shaft 25. The felt rings mainly serve a sealing function to reduce dust from entering the base. The bearing housing can provide stable support for the main shaft, ensuring stable high-speed rotation of the main shaft. The output end of the motor 2 is connected to one end of the main shaft 25 via belt drive. One end of the main shaft 25 is equipped with a blade 4, and a mechanical seal 5 is fitted on the main shaft 25. A flange seat 6 is provided on the outside of the mechanical seal 5, which is connected to the side of the slurry pool. The flange seat is connected to the side of the slurry pool by bolt connection. The side of the slurry pool has a right-angle plate with openings in the plate. The flange seat is connected to the plate, and the gap between the plate and the side of the slurry pool is welded to prevent slurry leakage. The blades 4 on both sides are installed in the paddle pool, and the blades 4 on both sides are arranged in a symmetrical oblique insertion manner in the paddle pool, as shown in the attached figure. Figure 4 As shown; by using two sets of blades installed in a symmetrical oblique insertion configuration, a composite flow field of axial thrust and radial diffusion is generated simultaneously, forming a "diagonal cross circulation" that completely covers the corners of the pool, eliminating the "one-sided effect" of traditional single-blade oblique insertion. The oblique insertion angle disrupts the central symmetry of the vertical axis, and the reverse flow of the two blades cancels out the centrifugal force. The flange seat 6 is fitted with blades 4, the inner ends of which are fixedly connected to the main shaft 25. The blades 4 on both sides extend into the slurry pool in an oblique insertion configuration. The so-called oblique insertion refers to the agitator blades being inserted into the slurry pool at a non-vertical, non-horizontal angle, and usually forming a certain angle with the axis or wall of the container. In this embodiment, the blades on both sides are circumferentially symmetrical and are inserted from both sides of the slurry pool at the same angle. When the blades rotate, they simultaneously generate radial thrust (diffusion in all directions) and axial thrust (pushing along the main shaft direction), forming a three-dimensional cross flow field. The specific fluid movement direction is shown in the attached figure. Figure 5 As shown.

[0022] The inner side of the mechanical seal 5 is fitted with a packing assembly 7 that fits against the outer surface of the main shaft 25. The packing assembly, through its packing layer and packing ring, prevents slurry leakage and impurity intrusion, while also assisting in supporting the main shaft, reducing operational wear, and ensuring stable and reliable operation of the agitator in complex environments such as pulp tanks. The impeller 4 includes a hub 17 connected to the main shaft 25 via a key structure. The outer side of the hub 17 has multiple blades 18 evenly distributed. The outer end of the hub 17 is provided with a hub end cap 19, which is connected to the hub by set screws. It is connected to the main shaft through bolts in the middle section, resulting in a simple structure and convenient installation.

[0023] A shaft protection cover 15 for covering the main shaft 25 is installed at the lower part of the frame 1 and between the bearing seats 3. A sealing protection cover 16 for covering the main shaft 25 is also installed at the lower part of the frame 1 and between the bearing seats 3 and the packing assembly 7. The shaft protection cover and the sealing protection cover uniformly seal and cover the gap between the shaft and the components, reducing dust and impurities from entering through the connection gap and increasing wear during the rotation of the main shaft.

[0024] The packing assembly 7 includes a packing seat 20 connected to the mechanical seal 5, as shown in the attached figure. Figure 2 As shown, a packing gland 21 is provided at one end of the packing seat 20. A packing ring 22 that fits against the main shaft 25 is provided inside the packing seat 20. A packing layer 23 is installed between the packing ring 22 and the packing seat 20. This packing layer is made of oil-impregnated asbestos and has self-lubricating properties. It forms a lubricating film when the main shaft rotates, reducing wear. Both ends of the packing seat 20 have sealing rings 24 that fit against the main shaft 25. The packing ring can play a role in auxiliary support of the shaft system.

[0025] The working principle of this utility model is as follows: The motor 2 on the frame 1 transmits power to one end of the main shaft 25 through belt drive, driving the main shaft 25 to rotate at high speed. The main shaft 25 has a stepped shaft structure and is installed in multiple bearing seats 3. The bearing seats 3 provide rigid support for the main shaft 25 through the seat body 11, bearing 12, and bearing positioning sleeve 13, ensuring rotational stability. The blades 4 at both ends of the main shaft 25 are symmetrically and obliquely inserted in the slurry pool and rotate in opposite directions. When the blades 4 rotate, the blades 18 push the slurry to flow axially along the main shaft 25, forming a bidirectional counter-current axial flow. The packing assembly 7 inside the mechanical seal 5 is tightly attached to the main shaft 25 with elastic materials such as oil-impregnated asbestos, forming a flexible support to help absorb vibration and compensate for the slight offset of the main shaft 25. The outer side of the mechanical seal 5 is rigidly connected to the side wall of the slurry pool through the flange seat 6, forming the first seal and isolating the internal and external environments of the slurry pool.

Claims

1. A double-push inclined-insertion stirring structure for a slurry tank, comprising a pair of frames (1) arranged circumferentially symmetrically along the outer edge of the slurry tank, wherein a motor (2) is mounted on the frames (1), characterized in that: The bottom of the frame (1) is provided with multiple bearing seats (3), and the bearing seats (3) are provided with a main shaft (25). The output end of the motor (2) is connected to one end of the main shaft (25) via belt drive. One end of the main shaft (25) is provided with a blade (4). A mechanical seal (5) is fitted on the main shaft (25). The outer side of the mechanical seal (5) is provided with a flange seat (6) connected to the side of the slurry pool. The blade (4) is inserted through the flange seat (6). The inner end of the blade (4) is fixedly connected to the main shaft (25). The blades (4) on both sides are inserted into the slurry pool in an oblique manner. The inner side of the mechanical seal (5) is provided with a packing assembly (7) that fits against the outer surface of the main shaft (25).

2. The double-push inclined insertion stirring structure for a slurry tank according to claim 1, characterized in that: The frame (1) is provided with a stud (8), the stud (8) is provided with a motor pad (9), and the stud (8) is fitted with a plurality of nuts (10), the nuts (10) are respectively attached to the upper and lower surfaces of the motor pad (9), and the motor (2) is mounted on the motor pad (9).

3. The double-push inclined insertion stirring structure for a slurry tank according to claim 1, characterized in that: The bearing housing (3) includes a seat body (11) connected to the bottom of the frame (1), a bearing (12) is provided inside the seat body (11), the main shaft (25) passes through the bearing (12), and a bearing positioning sleeve (13) is also provided on the main shaft (25). One end of the bearing positioning sleeve (13) is in close contact with the bearing (12); both ends of the seat body (11) have felt rings (14) that fit against the outer circle of the main shaft (25).

4. The double-push inclined insertion stirring structure for a slurry tank according to claim 3, characterized in that: A shaft protection cover (15) for covering the main shaft (25) is provided at the lower part of the frame (1) and between the bearing seats (3), and a sealing protection cover (16) for covering the main shaft (25) is provided at the lower part of the frame (1) and between the bearing seats (3) and the packing assembly (7).

5. The double-push inclined insertion stirring structure for a slurry tank according to claim 1, characterized in that: The blade (4) includes a hub (17) connected to the main shaft (25) via a key structure. Multiple blades (18) are evenly arranged on the outer side of the hub (17), and a hub end cap (19) is provided at the outer end of the hub (17).

6. The double-push inclined insertion stirring structure for a slurry tank according to claim 1, characterized in that: The packing assembly (7) includes a packing seat (20) connected to the mechanical seal (5), a packing gland (21) is provided at one end of the packing seat (20), a packing ring (22) is provided inside the packing seat (20) to fit against the main shaft (25), and a packing layer (23) is provided between the packing ring (22) and the packing seat (20); the packing seat (20) has sealing rings (24) at both ends to fit against the main shaft (25).

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