Paper pulp stirring paddle convenient to assemble and disassemble and stirring device

Abstract

The utility model discloses a paper pulp stirring paddle convenient to assemble and disassemble and a stirring device, the paper pulp stirring paddle comprises a main shaft and at least one stirring assembly arranged on the main shaft, the stirring assembly comprises a connecting sleeve and at least one stirring part connected to the outer wall of the connecting sleeve, the connecting sleeve is fixedly arranged on the main shaft, and the stirring part is fixedly arranged on the main shaft. At least one limiting block is installed at the position, corresponding to the installation position of the stirring assembly, of the main shaft, the connecting sleeve comprises two semi-rings, extending plates are arranged at the two radial ends of each semi-ring respectively, the extending plates on the semi-rings on the two sides are detachably connected through fasteners, clamping grooves are formed in one end of the connecting sleeve, and the number of the clamping grooves is equal to that of the limiting blocks. And the clamping groove is clamped on the limiting block. When the stirring assembly needs to be maintained, the stirring assembly can be conveniently disassembled to be welded or replaced, so that the stirring assembly is more convenient to maintain.

Description

A pulp mixing paddle and mixing device that are easy to assemble and disassemble Technical Field

[0001] This utility model relates to the field of mixing equipment technology, and in particular to a pulp mixing paddle and mixing device that are easy to assemble and disassemble. Background Technology

[0002] In the pulping process of recycled paper, an agitator is needed to stir the pulped paper. During production, due to the relatively thick pulp, the agitator blades inside the agitator are prone to damage, mainly manifested as breakage between the agitator and the connecting sleeve. The simplest repair method is to weld the agitator to the connecting sleeve, but this is inconvenient due to the enclosed internal space and sometimes the high welding position. Furthermore, welding directly to the connecting sleeve can cause localized heating of the main shaft, leading to deformation. Replacing the connecting sleeve with a new part requires completely disassembling the main shaft, which is labor-intensive. Therefore, our company's technical personnel have proposed this application for a pulp agitator blade and agitator device that are easy to assemble and disassemble.

[0003] A search revealed Chinese patent document CN220460373U, published on February 9, 2024, which discloses an installation structure for agitator blades and an agitator impeller. Its advantage is that the blades are connected to a fixing assembly via bolts, facilitating blade installation and removal. However, a drawback is that if the fixing assembly or impeller seat breaks, repair and replacement become inconvenient. Summary of the Invention

[0004] The purpose of this invention is to provide a pulp mixing paddle that is easy to assemble and disassemble. When the mixing component needs maintenance, it can be easily disassembled for welding or replacement, making the maintenance of the mixing component more convenient.

[0005] To achieve the above objectives, this utility model provides a pulp mixing paddle that is easy to assemble and disassemble, including a main shaft and at least one mixing component mounted on the main shaft. The mixing component includes a connecting sleeve and at least one mixing part connected to the outer wall of the connecting sleeve. The connecting sleeve is fixedly mounted on the main shaft. At least one limiting block is installed on the main shaft at the position corresponding to the installation of the mixing component. The connecting sleeve includes two semi-rings, and each of the radial ends of the semi-rings is provided with an extension plate. The extension plates on both sides of the semi-rings are detachably connected by fasteners. One end of the connecting sleeve is provided with a number of slots equal to the number of limiting blocks, and the slots are engaged with the limiting blocks.

[0006] A connecting plate is fixed to the outer wall of the semi-ring, and the stirring part is detachably connected to the connecting plate.

[0007] The connecting plate and the stirring part are respectively provided with a plurality of first through holes, and bolts are used to connect the connecting plate and the stirring part through the first through holes.

[0008] A fixing sleeve is installed on the main shaft at the position corresponding to the installation of the stirring component. The fixing sleeve includes a sleeve body and a ring body. The ring body is fixed to the lower end of the sleeve body. The limiting block is installed on the upper side of the ring body. The connecting sleeve is fitted onto the sleeve body.

[0009] The lower end of the sleeve is provided with the same number of limiting holes as the limiting blocks. One end of the limiting block is inserted into the limiting hole, and the other end is located on the ring.

[0010] The limiting holes are provided in multiple ways, and limiting rings are fitted on the outer side of the limiting holes.

[0011] The connecting sleeve has a clearance groove on the outer wall of one end of the slot to avoid the limiting ring.

[0012] The fixed sleeve has a through positioning hole in the radial direction, and the main shaft has a pin hole at the position corresponding to the installation of the stirring component. The pin passes through the positioning hole and the pin hole.

[0013] The inner wall of the fixed sleeve is provided with a first keyway axially, and the main shaft is provided with a second keyway at the position corresponding to the installation of the stirring component. A flat key is installed in the first keyway and the second keyway.

[0014] A mixing device employs the aforementioned easy-to-assemble and disassemble pulp mixing paddle.

[0015] Compared with the prior art, this utility model has the following technical effects:

[0016] 1. This utility model designs the connecting sleeve as two semi-rings, which are detachably connected by fasteners. This eliminates the need to remove the main shaft when disassembling the connecting sleeve; simply removing the fasteners allows for removal. A limiting block is installed on the main shaft, and a slot is provided at the lower end of the connecting sleeve, which mates with the limiting block. During installation, the two semi-rings are brought together onto the main shaft, the slot is then engaged with the limiting block, and finally the fasteners are installed, holding the main shaft in place by the two semi-rings. This allows for easy disassembly and welding or replacement of the mixing assembly when maintenance is required, making maintenance of the mixing assembly more convenient.

[0017] 2. By setting the limiting block on the fixed sleeve, this utility model avoids the need for drilling or welding on the main shaft.

[0018] 3. This utility model, by setting a limiting ring and fitting it onto the outside of the limiting hole, can limit the limiting hole, thus preventing it from being welded to the fixing sleeve and from falling off. When installing the limiting block, simply insert the limiting block into the limiting hole, which is not only convenient for installation but also easy to replace after the limiting hole wears out. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0020] Figure 1 is a three-dimensional structural diagram of the pulp mixing paddle of this utility model.

[0021] Figure 2 is a three-dimensional structural diagram of the main shaft in this utility model.

[0022] Figure 3 is a three-dimensional structural diagram of the stirring component in this utility model.

[0023] Figure 4 is an exploded view of the stirring assembly in this utility model.

[0024] Figure 5 is a schematic diagram of the structure of the fixed sleeve with the limiting block and the limiting ring installed in this utility model.

[0025] Figure 6 is a schematic diagram of the limiting block in this utility model.

[0026] Figure 7 is a three-dimensional structural diagram of the fixing sleeve in this utility model.

[0027] Figure 8 is a three-dimensional structural diagram of the stirring part and the semi-ring in this utility model.

[0028] Figure 9 is a three-dimensional structural diagram of the stirring part and the semi-ring from another perspective in this utility model.

[0029] Figure label:

[0030] Main spindle 10, second keyway 11, pin hole 12, flat key 13, pin 14

[0031] Limit block 20,

[0032] Connecting sleeve 30, semi-ring 31, protruding plate 32, connecting hole 33, fastener 34, slot 35, connecting plate 36, clearance groove 37;

[0033] Stirring section 40, first through hole 41, bolt 42;

[0034] Fixed sleeve 50, sleeve body 51, first keyway 511, positioning hole 512, ring body 52, limiting hole 53;

[0035] Limiting ring 60. Detailed Implementation

[0036] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0037] Example 1:

[0038] Please refer to Figures 1-9. A pulp mixing paddle that is easy to assemble and disassemble includes a main shaft 10 and at least one mixing component mounted on the main shaft 10. The mixing component includes a connecting sleeve 30 and at least one mixing part 40 welded to the outer wall of the connecting sleeve 30. The connecting sleeve 30 is fixedly mounted on the main shaft 10. At least one limiting block 20 is installed on the main shaft 10 at the position corresponding to the installation of the mixing component. The connecting sleeve 30 includes two semi-rings 31. The radial ends of the semi-rings 31 are respectively provided with protruding plates 32. The protruding plates 32 on the two semi-rings 31 are detachably connected by fasteners 34. One end of the connecting sleeve 30 is provided with a number of slots 35 equal to the number of limiting blocks 20. The slots 35 are engaged with the limiting blocks 20.

[0039] By configuring the connecting sleeve 30 as two semi-rings 31, which are detachably connected by fasteners 34, the main shaft 10 does not need to be removed when disassembling the connecting sleeve 30; only the fasteners 34 need to be removed to remove the connecting sleeve 30. A limiting block 20 is installed on the main shaft 10, and a slot 35 is provided at the lower end of the connecting sleeve 30, which is adapted to the limiting block 20. During installation, the two semi-rings 31 are brought together onto the main shaft 10, and then the slot 35 is engaged with the limiting block 20. After that, the fasteners 34 are installed, and the main shaft 10 is held in place by the two semi-rings 31. In this way, when the mixing assembly needs maintenance, it can be easily disassembled for welding or replacement, making the maintenance of the mixing assembly more convenient.

[0040] In this embodiment, there may be one or more limiting blocks 20. Preferably, as shown in Figure 6, there are two, four or six limiting blocks 20, which are evenly distributed in a ring on the main shaft 10.

[0041] Specifically, the limiting block 20 can be welded to the spindle 10, or a socket can be provided on the spindle 10, and the limiting block 20 can be inserted and fixed in the socket.

[0042] In this embodiment, referring to Figures 8 and 9, the protruding plate 32 is provided with a connecting hole 33, and the fastener 34 is a bolt. Referring to Figure 3, the protruding plates 32 on both sides of the semi-ring 31 are detachably connected by bolts.

[0043] Example 2:

[0044] Based on Example 1, in order to facilitate the installation of the stirring part 40, as shown in Figures 8 and 9, a connecting plate 36 is fixed to the outer wall of the semi-ring 31, and the stirring part 40 is detachably connected to the connecting plate 36.

[0045] Specifically, referring to Figure 8, the connecting plate 36 and the stirring part 40 are respectively provided with a plurality of first through holes 41, and the bolts 42 connect the connecting plate 36 and the stirring part 40 through the first through holes 41.

[0046] Example 3:

[0047] Installing the limiting block 20 directly on the spindle 10 may reduce the strength of the spindle 10 or cause the spindle 10 to deform. For example, if the limiting block 20 is welded to the spindle 10, the spindle 10 may be at risk of deformation; if a hole is made in the spindle 10, the structural strength of the spindle 10 will be reduced.

[0048] Therefore, based on Embodiment 1 or Embodiment 2, referring to Figures 3, 4, and 5, a fixing sleeve 50 is installed on the main shaft 10 at the position corresponding to the installation of the stirring component. The fixing sleeve 50 includes a sleeve body 51 and a ring body 52. ​​The ring body 52 is fixedly connected to the lower end of the sleeve body 51, and a limiting block 20 is installed on the upper side of the ring body 52. ​​A connecting sleeve 30 is fitted onto the sleeve body 51. By setting the limiting block 20 on the fixing sleeve 50, the need for drilling or welding on the main shaft 10 is avoided.

[0049] The fixed sleeve 50 can be installed on the spindle 10 by interference fit. The inner diameter of the ring 52 is the same as the inner diameter of the sleeve 51, and the outer diameter of the ring 52 is larger than the outer diameter of the sleeve 51, thus forming a step on the ring 52 to facilitate the installation of the limiting block 20. In this embodiment, the limiting block 20 can be welded to the upper side of the ring 52.

[0050] Example 4:

[0051] The difference between this embodiment and embodiment 3 is that, as shown in Figure 7, the lower end of the sleeve 51 is provided with the same number of limiting holes 53 as the limiting blocks 20. One end of the limiting block 20 is inserted into the limiting hole 53, and the other end is located on the ring 52.

[0052] In this embodiment, there are multiple limiting blocks 20, as shown in Figure 6. After being installed into the fixing sleeve 50, it is shown in Figure 5.

[0053] In this embodiment, the limiting block 20 and the limiting hole 53 are fixed by interference fit or welding to prevent the limiting block 20 from falling off.

[0054] Example 5:

[0055] Based on Embodiment 4, referring to Figure 5, multiple limiting holes 53 are provided, and limiting rings 60 are fitted onto the outer side of the limiting holes 53. By providing limiting rings 60 and fitting them onto the outer side of the limiting holes 53, the limiting holes 53 can be limited, thus preventing the limiting holes 53 from being welded to the fixing sleeve 50 and from falling off. When installing the limiting block 20, it is only necessary to insert the limiting block 20 into the limiting hole 53, which is not only convenient for installation but also facilitates replacement after the limiting hole 53 wears out.

[0056] Since the limit ring 60 is set, the top of the connecting sleeve 30 can only abut against the limit ring 60, thereby reducing the contact area between the limit hole 53 and the limit block 20.

[0057] Therefore, referring to Figure 9, the outer wall of one end of the connecting sleeve 30 located in the slot 35 is provided with a clearance groove 37 for avoiding the limiting ring 60. In this way, when the connecting sleeve 30 is installed, the lower end of the connecting sleeve 30 can be inserted into the limiting ring 60.

[0058] Example 6:

[0059] Based on embodiment 3, 4 or 5, in order to facilitate the installation and fixation of the fixing sleeve 50 onto the main shaft 10, as shown in Figures 2, 4 and 5, the fixing sleeve 50 is provided with a through positioning hole 512 in the radial direction, and the main shaft 10 is provided with a pin hole 12 at the position corresponding to the installation of the stirring component. The pin 14 passes through the positioning hole 512 and the pin hole 12, and the fixing sleeve 50 is connected and fixed to the main shaft 10 by the pin 14.

[0060] Furthermore, a first keyway 511 is axially provided on the inner wall of the fixed sleeve 50, and a second keyway 11 is provided on the main shaft 10 at the position corresponding to the installation of the stirring component. A flat key 13 is installed in the first keyway 511 and the second keyway 11. This improves the structural strength of the connection between the fixed sleeve 50 and the main shaft 10.

[0061] Example 7:

[0062] Based on embodiments 1, 2, 3, 4, 5, or 6, this utility model also discloses a stirring device that uses the aforementioned easy-to-assemble and disassemble pulp stirring paddle.

[0063] Of course, the mixing device can also be a mixer used in other industries.

[0064] Specifically, the mixing device is a pulp mixer in the prior art. During installation, the main shaft 10 is connected to the drive motor to drive the main shaft 10 to rotate.

[0065] The working principle or operation process of this utility model is as follows:

[0066] Referring to Figures 1 to 4, when installing the stirring assembly on the main shaft 10, first fix the fixing sleeve 50 to the main shaft 10 through the flat key 13 and the pin 14, then insert the limiting block 20 into the limiting hole 53 of the fixing sleeve 50, and then fit the limiting ring 60 onto the outside of the limiting hole 53, as shown in Figure 5.

[0067] Then, the two semi-rings 31 are brought together onto the fixed sleeve 50, the slot 35 is inserted into the limit block 20, and the fastener 34 is installed to hold the fixed sleeve 50 tightly through the two semi-rings 31.

[0068] Furthermore, the stirring unit 40 is also detachably mounted on the connecting plate 36.

[0069] In this way, when the mixing assembly needs maintenance, the mixing part 40 and the connecting sleeve 30 can be removed from the main shaft 10 for maintenance or replacement without removing the main shaft 10, making the maintenance of the mixing assembly more convenient.

Claims

1. A pulp mixing paddle that is easy to assemble and disassemble, comprising a main shaft (10) and at least one mixing assembly mounted on the main shaft (10), the mixing assembly comprising a connecting sleeve (30) and at least one mixing part (40) connected to the outer wall of the connecting sleeve (30), the connecting sleeve (30) being fixedly mounted on the main shaft (10), characterized in that: At least one limiting block (20) is installed on the main shaft (10) at the position corresponding to the installation of the stirring component. The connecting sleeve (30) includes two semi-rings (31). The radial ends of the semi-rings (31) are respectively provided with protruding plates (32). The protruding plates (32) on both sides of the semi-rings (31) are detachably connected by fasteners (34). One end of the connecting sleeve (30) is provided with a number of slots (35) equal to the number of limiting blocks (20). The slots (35) are engaged with the limiting blocks (20).

2. The pulp mixing paddle that is easy to assemble and disassemble according to claim 1, characterized in that: The outer wall of the semi-ring (31) is fixedly connected to a connecting plate (36), and the stirring part (40) is detachably connected to the connecting plate (36).

3. The pulp mixing paddle that is easy to assemble and disassemble according to claim 2, characterized in that: The connecting plate (36) and the stirring part (40) are respectively provided with a plurality of first through holes (41), and the bolts (42) connect the connecting plate (36) and the stirring part (40) through the first through holes (41).

4. A pulp mixing paddle that is easy to assemble and disassemble according to any one of claims 1 to 3, characterized in that: A fixing sleeve (50) is installed on the main shaft (10) at the position corresponding to the installation of the stirring component. The fixing sleeve (50) includes a sleeve body (51) and a ring body (52). The ring body (52) is fixed to the lower end of the sleeve body (51). The limiting block (20) is installed on the upper side of the ring body (52). The connecting sleeve (30) is fitted on the sleeve body (51).

5. The pulp mixing paddle that is easy to assemble and disassemble according to claim 4, characterized in that: The lower end of the sleeve (51) is provided with the same number of limiting holes (53) as the limiting blocks (20). One end of the limiting block (20) is inserted into the limiting hole (53), and the other end is located on the ring (52).

6. The pulp mixing paddle that is easy to assemble and disassemble according to claim 5, characterized in that: The limiting hole (53) is provided in multiple ways, and a limiting ring (60) is fitted on the outer side of the limiting hole (53).

7. A pulp mixing paddle that is easy to assemble and disassemble according to claim 6, characterized in that: The connecting sleeve (30) has a relief groove (37) on the outer wall of one end of the slot (35) for avoiding the limiting ring (60).

8. The pulp mixing paddle that is easy to assemble and disassemble according to claim 4, characterized in that: The fixed sleeve (50) is provided with a through positioning hole (512) in the radial direction, and the main shaft (10) is provided with a pin hole (12) at the position corresponding to the installation of the stirring component. The pin (14) passes through the positioning hole (512) and the pin hole (12).

9. A pulp mixing paddle that is easy to assemble and disassemble according to claim 8, characterized in that: The inner wall of the fixed sleeve (50) is provided with a first keyway (511) axially, and the main shaft (10) is provided with a second keyway (11) at the position corresponding to the installation of the stirring component. A flat key (13) is installed in the first keyway (511) and the second keyway (11).

10. A stirring device, characterized in that: The pulp mixing paddle described in any one of claims 1 to 9 is easy to assemble and disassemble.

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