A stirring tank rotating shaft sealing device

Abstract

The utility model provides a kind of stirring tank rotating shaft sealing device, including split base, elastic component, first fixed ring split piece, second fixed ring split piece and moving ring, split base includes at least two plate bodies, and the through hole that can be sleeved to rotating shaft outside is formed between multiple plate bodies;Elastic component is detachably installed on the plate body, and it has the push end of elastic expansion and contraction. The utility model can be directly assembled to the open position between stirring tank and rotating shaft by split base, and elastic component, fixed ring and moving ring are all one-to-one corresponding with the plate body of split base using split assembly, and part of opening is covered by split base, and the sealing strip of cooperating moving ring abuts rotating shaft, to form further sealing, and then by the push of elastic component, the end surface sealing of the two end faces of moving ring respectively with the first fixed ring formed by first fixed ring split piece and the second fixed ring formed by second fixed ring split piece is formed, to reach good dynamic sealing effect.

Description

Technical Field

[0001] This utility model relates to the field of shaft sealing technology, specifically to a shaft sealing device for a mixing tank. Background Technology

[0002] In the factory's mixing tanks, the shaft needs to penetrate the tank body, leaving a large opening that allows gas to escape and produce a strong odor. A simple way to seal this is to use a sealing plate with a through-hole matching the shaft's outer diameter, covering the opening. However, gaps still exist between the through-hole and the shaft, resulting in a poor seal. For a better seal at the shaft, a shaft seal can be used. For example, Chinese Patent 202223533212.5 discloses a high-pressure resistant rotary shaft seal, including a seal seat and a seal end cap.

[0003] Currently, most shaft seals on the market are ring-shaped sets, which are not convenient for installing shaft end seals in the gap between the shaft and the tank body of a mixing tank with an already installed mixing mechanism. If installation is required, the shaft of the mixing mechanism must be disassembled before the shaft seal can be installed, which is inconvenient. Therefore, a mixing tank shaft sealing device is proposed to specifically solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a mixing tank shaft sealing device to solve the technical problem in the prior art that it is inconvenient to install shaft end seals at the gap between the shaft and the tank body on a mixing tank with a mixing mechanism already installed.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0006] This utility model provides a sealing device for the rotating shaft of a mixing tank, comprising:

[0007] The split base includes at least two plates, and the plates are arranged together to form a through hole that can be fitted onto the outside of the rotating shaft;

[0008] An elastic component is detachably mounted on the plate and has an elastically retractable pushing end;

[0009] The first fixed-ring split piece corresponds one-to-one with the plate and is connected;

[0010] The second fixed-ring split piece corresponds one-to-one with the plate and is connected to the pushing end; and

[0011] The moving ring is slidably connected between the first fixed ring split piece and the second fixed ring split piece, and is used to be separately fitted onto the outside of the rotating shaft and to abut against the rotating shaft for sealing.

[0012] In some embodiments, the rotating ring includes at least two rotating ring split pieces and sealing strips, wherein the sealing strips are embedded in the inner side of the rotating ring split pieces in a corresponding manner, and the plurality of rotating ring split pieces are detachably connected to each other.

[0013] In some embodiments, the elastic component includes a connector, an elastic telescopic member, a guide member, and a fixed bracket. One end of the fixed bracket is detachably connected to the plate body, and the other end is connected to the elastic telescopic member. The guide member is disposed between the fixed bracket and the connector to guide the telescopic direction of the elastic telescopic member. The connector is detachably connected to the second fixed ring split piece.

[0014] In some embodiments, mounting ears are provided on both sides of the connector, and fixing bolts that are threadedly connected to the plate are inserted into the mounting ears.

[0015] In some embodiments, the elastic telescopic member includes a spring, the two ends of which are respectively connected to the connector and the fixed bracket.

[0016] In some embodiments, the guide includes a guide rod connected to the connector, passing through the fixed bracket, and slidably connected to the fixed bracket.

[0017] In some embodiments, an extension piece is provided between the rotating ring split pieces, and a locking screw is provided between two mating extension pieces, and the locking screw is threadedly connected to one side of the extension piece.

[0018] In some embodiments, the sealing strip has a T-shaped cross-section, and a sealing layer is provided at the bottom of the plate.

[0019] In some embodiments, the fixed bracket is provided with a first mounting hole, and the plate is provided with a second mounting hole corresponding to the first mounting hole. Anchor bolts are inserted between the first mounting hole and the second mounting hole.

[0020] In some embodiments, the first fixed ring split piece is connected to the plate body by a plurality of mounting screws.

[0021] Compared with the prior art, the mixing tank shaft sealing device provided by this utility model can be directly assembled to the open position between the mixing tank and the shaft through a split base. The elastic component, fixed ring and rotating ring are all assembled separately, corresponding one-to-one with the plates of the split base. The split base covers part of the open position, and the sealing strip of the rotating ring abuts against the shaft to form a further seal. Then, through the pushing of the elastic component, the two end faces of the rotating ring abut against the first fixed ring composed of the first fixed ring split pieces and the second fixed ring composed of the second fixed ring split pieces to form an end face seal, achieving a good dynamic sealing effect. This makes it easy to install a seal between the already installed mixing tank and the shaft. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the mixing tank shaft sealing device provided in this embodiment of the utility model;

[0023] Figure 2 This is a three-dimensional exploded view of the mixing tank shaft sealing device provided in this embodiment of the utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Split-type base; 11. Plate; 111. Second mounting hole; 112. Anchor bolt; 12. Through hole;

[0026] 2. Elastic component; 21. Connector; 211. Mounting ear; 212. Fixing bolt; 22. Elastic telescopic component; 221. Spring; 23. Guide component; 231. Guide rod; 24. Fixing bracket; 241. First mounting hole;

[0027] 3. First fixed ring split piece; 31. Mounting screws;

[0028] 4. Second fixed-ring split piece;

[0029] 5. Moving ring; 51. Moving ring split piece; 511. Extension piece; 512. Locking screw; 52. Sealing strip. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0031] To address the technical challenge of installing shaft end seals at the gap between the shaft and the tank body of an already installed mixing tank, this invention provides a mixing tank shaft sealing device. This device utilizes a split-type base, allowing direct assembly to the open area between the mixing tank and the shaft. The elastic component, fixed ring, and moving ring are all separately assembled, corresponding one-to-one with the plates of the split-type base. The split-type base partially covers the open area, and the sealing strip of the moving ring abuts against the shaft, forming a further seal. Furthermore, the elastic component pushes the two end faces of the moving ring against the first fixed ring (composed of two separate fixed ring pieces) and the second fixed ring (composed of two separate fixed ring pieces), forming end face seals. This achieves a good dynamic sealing effect, facilitating the installation of a seal between the already installed mixing tank and the shaft.

[0032] It should be noted that the mixing tank shaft sealing device described in this utility model is used in, but not limited to, mixing tanks. For ease of explanation, this utility model only uses the application of the mixing tank shaft sealing device in a mixing tank as an example. The principle of the mixing tank shaft sealing device applied to other types of equipment is essentially the same as that applied to a mixing tank, and will not be described in detail here.

[0033] Please see Figure 1 , Figure 1This is a three-dimensional structural diagram of a mixing tank shaft sealing device according to an embodiment of the present invention. The mixing tank shaft sealing device includes a split base 1, an elastic component 2, a first fixed ring split piece 3, a second fixed ring split piece 4, and a moving ring 5. The split base 1 includes at least two plates 11, preferably two plates 11, forming a semi-circular shape. The two semi-circular plates 11 surround a central through hole 12 that can be fitted onto the outside of the shaft. The two semi-circular plates 11 are directly fixed to the top of the mixing tank by bolts, placing the shaft inside the through hole 12 and covering part of the open area. In addition, there is no connecting structure between the plates 11. The installation method is to fix the plates 11 to the top of the mixing tank, eliminating the need for a fixed connection between the two plates 11, reducing installation steps. Correspondingly, corresponding positioning holes are opened on the top of the tank. The first fixed ring split piece 3 corresponds one-to-one with the plate 11 and is connected. Two first fixed ring split pieces 3 are also semi-circular, and the two first fixed ring split pieces 3 form the first fixed ring. The second fixed ring split piece 4 corresponds one-to-one with the plate 11 and is connected to the pushing end. Two second fixed ring split pieces 4 are also semi-circular, and the two second fixed ring split pieces 4 form the second fixed ring. The moving ring 5 is slidably connected between the first fixed ring split piece 3 and the second fixed ring split piece 4, including at least two moving ring split pieces 51 and sealing strips 52. The number of moving ring split pieces 51 is also two, and they are semi-circular. The sealing strips 52 are embedded one-to-one inside the moving ring split piece 51. The multiple moving ring split pieces 51 are detachably connected and used to be fitted onto the outside of the rotating shaft so that the sealing strips 52 abut against the rotating shaft. The first fixed ring and the second fixed ring abut against the lower end face and the upper end face of the moving ring 5, respectively. The elastic component 2 is detachably installed on the plate 11 and has an elastically retractable pushing end. The pushing end is connected to the top of the second fixed ring and elastically pushes the second fixed ring down, so that the second fixed ring abuts against the moving ring, and the moving ring abuts against the first fixed ring, forming a sliding seal on the end face.

[0034] In this embodiment, both the rotating ring and the stationary ring are made of materials with high self-lubricating properties and high temperature / wear resistance, such as PTFE, graphite, and silicon carbide, to provide a seal.

[0035] Understandably, the split base 1, elastic component 2, first fixed ring split piece 3, second fixed ring split piece 4, and rotating ring 5 constitute a structure for sealing the opening. The rotating ring 5 abuts against the rotating shaft through the sealing strip 52 and can rotate with the rotating shaft through friction to seal the gap and provide a relatively good shaft sealing effect.

[0036] In one embodiment, please refer to Figure 2To facilitate the installation of the elastic component 2, and to ensure that the same elastic component 2 is used at shaft seals of different diameters, the elastic component 2 includes a connector 21, an elastic telescopic component 22, a guide 23, and a fixed bracket 24. One end of the fixed bracket 24 is detachably connected to the plate 11. Two elastic components 2 are installed on one plate 11. The other end of the fixed bracket 24 is connected to the elastic telescopic component 22 to provide elastic thrust. The guide 23 is disposed between the fixed bracket 24 and the connector 21 to guide the telescopic direction of the elastic telescopic component 22. The connector 21 is detachably connected to the second fixed ring split piece 4, which pushes the second fixed ring split piece 4 downward, thereby pushing the ring 5 downward against the first fixed ring split piece 3.

[0037] For further details, please refer to Figure 2 To facilitate the installation and connection of the connector 21 and the second fixed ring split piece 4, the connector 21 is provided with mounting ears 211 on both sides. The mounting ears 211 are fitted with fixing bolts 212 that are threaded to the plate 11. The second fixed ring split piece 4 is provided with threaded grooves that correspond one-to-one with the mounting ears 211. The connector 21 can be fixed by aligning the mounting holes on the mounting ears 211 with the threaded grooves and then installing the fixing bolts 212.

[0038] In this embodiment, after connecting each connector 21 to the second fixed ring split piece 4, the fixed bracket 24 and the plate 11 are installed.

[0039] For further details, please refer to Figure 2 In order to provide elastic expansion and contraction, the elastic expansion member 22 includes a spring 221. The two ends of the spring 221 are respectively connected to the connector 21 and the fixed bracket 24. The spring 221 provides elastic resistance and elastic compensation to avoid end face seal failure.

[0040] Understandably, other elastic structural components can also be used for the elastic expansion member 22.

[0041] For further details, please refer to Figure 2 To prevent the second fixed ring split piece 4 from shifting position or elastic extension direction, the guide member 23 includes a guide rod 231. The guide rod 231 is connected to the connector 21 and passes through the fixed bracket 24, and is slidably connected to the fixed bracket 24. That is, the fixed bracket 24 has a guide hole corresponding to the guide rod 231. The guide rod 231 is inserted into the guide hole and slidably connected to the guide hole, so as to perform sliding guidance.

[0042] For further details, please refer to Figure 2In order to facilitate the connection of the rotating ring split pieces 51 and clamp them on the outside of the rotating shaft, an extension piece 511 is provided between the rotating ring split pieces 51. A locking screw 512 passes through the two mating extension pieces 511, and the locking screw 512 is threaded to the extension piece 511 on one side. By tightening the locking screw 512, the two rotating ring split pieces 51 can be pulled tight, thereby pressing the sealing strip 52 against the outside of the rotating shaft.

[0043] For further details, please refer to Figure 2 In order to facilitate the positioning and installation of the sealing strip 52, the cross-section of the sealing strip 52 is T-shaped, and the T-shaped sealing strip 52 is embedded into the inner side of the rotating ring split piece 51 for positioning and pressing the sealing strip 52 against the rotating shaft.

[0044] Understandably, the sealing strip 52 can also adopt other cross-sectional structures that can be installed on the moving ring 5.

[0045] Furthermore, in order to improve the sealing between the plate 11 and the mixing tank, a sealing layer is provided at the bottom of the plate 11 to provide a seal between the plate 11 and the mixing end when the plate 11 is installed in the mixing tank.

[0046] In one embodiment, please refer to Figure 2 To improve the ease of installation, the fixed bracket 24 is provided with a first mounting hole 241, and the plate 11 is provided with a second mounting hole 111 corresponding to the first mounting hole 241. Anchor bolts 112 are inserted between the first mounting hole 241 and the second mounting hole 111. Through an anchor bolt 112, the elastic component 2 can be fixed and positioned to the plate 11 and the plate 11 can be fixed and positioned to the mixing tank during installation, thereby simplifying the fixed installation operation and facilitating the overall assembly and disassembly.

[0047] In one embodiment, please refer to Figure 2 The first fixed ring split piece 3 is connected to the plate 11 by a number of mounting screws 31, so that the first fixed ring split piece 3 can be pre-installed on the plate 11 for easy subsequent installation.

[0048] To better understand this utility model, the following is combined with... Figures 1 to 2The technical solution of this utility model is described in detail as follows: First, a top screw hole for fixing the plate 11 is opened on the top of the mixing tank. The first fixed ring split piece 3 is first fixedly installed on the plate 11 for pre-assembly. Then, the screw hole is aligned with the second mounting hole 111 on the plate 11 and fitted onto the outer circumference of the rotating shaft. Next, the moving ring split piece 51 of the moving ring 5 is stacked on the first fixed ring split piece 3, and the locking screw 512 is passed through the extension piece 511 for preliminary connection, but not locked. Then, the second fixed ring split piece 4 is connected to the connecting piece 21 of the elastic component 2. The mounting ear 211 is fixedly connected to the second fixed ring split piece 4 by the fixing bolt 212. This can also be used as pre-assembly. During installation, the mounting ear 211 is directly installed. The second fixed ring split piece 4 of the component 2 is stacked on the moving ring 5; then the first mounting hole 241 at the bottom of the fixed bracket 24 is aligned with the second mounting hole 111, and then the anchor bolt 112 is threaded through the first mounting hole 241 and the second mounting hole 111 from top to bottom and threaded into the screw hole at the top of the mixing tank to lock it. During the locking process, the fixed bracket 24 is pressed down, and the spring 221 is pressed down by the fixed bracket 24, thereby pressing the second fixed ring split piece 4, the moving ring 5 and the second fixed ring split piece 3 together so that the end faces fit tightly; finally, the locking screw 512 is tightened to press the sealing strip 52 against the rotating shaft to form a shaft seal and seal the open gap between the mixing mechanism and the mixing tank.

[0049] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A sealing device for the shaft of a mixing tank, characterized in that, include: The split base includes at least two plates, and the plates are arranged together to form a through hole that can be fitted onto the outside of the rotating shaft; An elastic component is detachably mounted on the plate and has an elastically retractable pushing end; The first fixed-ring split piece corresponds one-to-one with the plate and is connected; The second fixed ring split piece corresponds one-to-one with the plate and is connected to the pushing end; as well as The moving ring is slidably connected between the first fixed ring split piece and the second fixed ring split piece, and is used to be separately fitted onto the outside of the rotating shaft and to abut against the rotating shaft for sealing.

2. The mixing tank shaft sealing device according to claim 1, characterized in that, The rotating ring includes at least two rotating ring segments and sealing strips. The sealing strips are embedded in the inner side of the rotating ring segments one by one, and the multiple rotating ring segments are detachably connected.

3. The mixing tank shaft sealing device according to claim 2, characterized in that, The elastic component includes a connector, an elastic telescopic component, a guide, and a fixed bracket. One end of the fixed bracket is detachably connected to the plate body, and the other end is connected to the elastic telescopic component. The guide is disposed between the fixed bracket and the connector to guide the telescopic direction of the elastic telescopic component. The connector is detachably connected to the second fixed ring split piece.

4. The mixing tank shaft sealing device according to claim 3, characterized in that, The connector has mounting ears on both sides, and fixing bolts that are threadedly connected to the plate are inserted into the mounting ears.

5. The mixing tank shaft sealing device according to claim 3, characterized in that, The elastic telescopic component includes a spring, and the two ends of the spring are respectively connected to the connector and the fixed bracket.

6. The mixing tank shaft sealing device according to claim 3, characterized in that, The guide member includes a guide rod, which is connected to the connector, passes through the fixed bracket, and is slidably connected to the fixed bracket.

7. The mixing tank shaft sealing device according to claim 3, characterized in that, An extension piece is provided between the rotating ring split pieces, and a locking screw is provided between the two mating extension pieces, and the locking screw is threadedly connected to one side of the extension piece.

8. The mixing tank shaft sealing device according to claim 3, characterized in that, The sealing strip has a T-shaped cross-section, and a sealing layer is provided at the bottom of the plate.

9. The mixing tank shaft sealing device according to claim 3, characterized in that, The fixed bracket has a first mounting hole, and the plate has a second mounting hole corresponding to the first mounting hole. Anchor bolts are inserted between the first mounting hole and the second mounting hole.

10. The mixing tank shaft sealing device according to claim 1, characterized in that, The first fixed ring split piece is connected to the plate body by a number of mounting screws.

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