Underwater stirrer and underwater glue injection system

Abstract

The invention relates to an underwater stirrer and an underwater glue injection system. The underwater stirrer comprises a driving motor, a stirring barrel, a transmission shaft, blades and a bearing seat, the stirring barrel comprises a barrel body and a cover body used for sealing the barrel body, an avoiding hole is formed in the cover body, one end of the transmission shaft is connected with an output shaft of the driving motor, the other end of the transmission shaft penetrates through the avoiding hole and extends into the barrel body, and a mechanical seal is arranged between the transmission shaft and the cover body. The paddle is connected with the transmission shaft and is positioned in the stirring barrel, the bearing seat is sleeved outside the transmission shaft, one end of the bearing seat is hermetically connected with the cover body, a first sealing element is arranged between the bearing seat and the cover body, the other end of the bearing seat is hermetically connected with the driving motor, and a second sealing element is arranged between the bearing seat and the driving motor. The underwater stirrer is more suitable for underwater construction environments.

Description

Technical Field

[0001] The present application relates to the technical field of underwater construction equipment, and in particular to an underwater agitator and an underwater glue injection system. Background Art

[0002] As my country continues to expand and deepen its presence in the fields of marine and underwater engineering, underwater construction and maintenance are becoming more and more common, such as underwater pipeline repair, underwater pile foundation reinforcement, and submarine cable repair. In these projects, glue injection operations are often required in underwater environments.

[0003] During glue injection, different components of the glue are usually stirred and mixed to form a composite glue before injection. However, most current agitators can only be used in onshore environments and are difficult to meet the needs of underwater glue injection. Summary of the Invention

[0004] Based on this, it is necessary to provide an underwater agitator and an underwater glue injection system to solve the problem that traditional agitators are not suitable for underwater construction.

[0005] On one hand, the present application provides an underwater agitator, comprising:

[0006] Drive motor;

[0007] A mixing barrel, comprising a barrel body and a cover for sealing the barrel body, wherein the cover body is provided with an avoidance hole;

[0008] a transmission shaft, one end of which is connected to the output shaft of the drive motor, the other end of which passes through the avoidance hole and extends into the barrel body, and a mechanical seal is provided between the transmission shaft and the cover body;

[0009] a paddle connected to the transmission shaft and located in the mixing barrel;

[0010] A bearing seat, wherein the bearing seat is sleeved outside the transmission shaft, and one end of the bearing seat is sealed with the cover body, a first seal is provided between the bearing seat and the cover body, and the other end of the bearing seat is sealed with the drive motor, and a second seal is provided between the bearing seat and the drive motor.

[0011] The technical solution is further described below:

[0012] In one embodiment, the bearing seat cover comprises:

[0013] a cover plate, the cover plate sealing the barrel body, the avoidance hole being provided on the cover plate;

[0014] A connecting portion protrudes from the cover plate, the connecting portion is arranged around the outer periphery of the avoidance hole, the end of the connecting portion facing away from the cover plate is sealed with the bearing seat, and the first sealing member is arranged between the connecting portion and the bearing seat.

[0015] In one embodiment, a first flange is provided at an end of the connecting portion facing away from the cover plate, a second flange is provided at an end of the bearing seat close to the cover body, the first flange is butted against the second flange, and the first sealing member is disposed between the first flange and the second flange;

[0016] The underwater agitator further comprises a clamping member, which is clamped on the first flange and the second flange.

[0017] In one embodiment, an end cover is provided at one end of the bearing seat away from the cover body, the drive motor includes a waterproof shell, the waterproof shell is provided with a support, the support is fixedly connected to the end cover, and the second seal is arranged between the support and the end cover.

[0018] In one embodiment, the inner wall of the bearing seat is provided with a positioning boss, and the positioning boss is provided with a positioning step at one end close to the driving motor; the underwater mixer also includes a bearing pressure plate, which is connected to the end of the positioning boss away from the positioning step, and a limiting space is formed between the bearing pressure plate, the positioning boss and the positioning step for accommodating the bearing and limiting the position of the bearing.

[0019] In one embodiment, a sealing assembly is provided between the bearing pressure plate and the bearing.

[0020] In one embodiment, the sealing assembly includes an elastic sealing ring and an O-ring, one end of the elastic sealing ring abuts against the bearing pressure plate, the other end of the elastic sealing ring abuts against the bearing, and the O-ring is sleeved outside the elastic sealing ring and abuts against the positioning boss.

[0021] In one embodiment, the drive motor is a pneumatic motor.

[0022] In one embodiment, there are multiple blades, and the multiple blades are arranged at intervals along the circumference and axial direction of the rotating shaft.

[0023] On the other hand, the present application also provides an underwater glue injection system, including the above-mentioned underwater agitator.

[0024] The above-mentioned underwater agitator drives the drive shaft to rotate through the drive motor, which can drive the blades to mix the colloid in the mixing barrel. By arranging a mechanical seal between the drive shaft and the cover body, the mechanical seal can effectively seal the fitting gap between the drive shaft and the cover body, and prevent the colloid from leaking from the avoidance port into the bearing seat and contaminating the bearing or the drive motor without affecting the rotation of the drive shaft relative to the cover body. The drive shaft is supported and fixed by the bearing, ensuring that the drive shaft remains stable during rotation and preventing the drive shaft from being deformed or damaged due to uneven force or excessive friction. In addition, by arranging the bearing in the bearing seat and sealing one end of the bearing seat with the cover body and the other end of the bearing seat with the drive motor, on the one hand, the installation and fixation of the bearing seat motor is achieved, and on the other hand, the sealing performance of the bearing seat is guaranteed, preventing water from entering the bearing shaft seat and damaging the bearing or the drive motor, so that the underwater agitator can be used in underwater construction environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings that constitute a part of this application are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application.

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the various elements are drawn only for illustrative purposes and are not necessarily drawn to true scale.

[0028] Figure 1 Schematic diagram of the structure of a control panel according to an embodiment.

[0029] Figure 2 Schematic diagram of the structure of an underwater glue injection system according to an embodiment.

[0030] Figure 3 Schematic diagram of the structure of an underwater agitator according to an embodiment.

[0031] Figure 4 for Figure 3 The underwater mixer shown in FIG is a cross-sectional view at section AA.

[0032] Figure 5 for Figure 4 A partial enlarged view of the part B shown in FIG.

[0033] Description of reference numerals:

[0034] 10. Control panel; 11. Glue injection stop valve; 12. Stirring stop valve; 13. Glue injection pressure regulating valve; 14. Stirring pressure regulating valve; 15. Glue injection pressure gauge; 16. Stirring pressure gauge; 20. Glue storage barrel; 21. First air inlet; 22. First glue outlet; 30. Stirring barrel; 301. Glue inlet; 302. Air outlet; 303. Second glue outlet; 31. Barrel body; 32. Cover; 321. Cover plate; 322. Connecting part; 323. First flange; 40. Underwater agitator; 41. Drive motor; 42. 11. Second air inlet; 412. Support; 42. Bearing seat; 421. Second flange; 422. End cover; 423. Positioning boss; 424. Positioning step; 425. Bearing pressure plate; 43. Drive shaft; 44. Paddle; 45. Bearing; 51. First seal; 52. Second seal; 53. Mechanical seal; 54. Sealing assembly; 541. Elastic sealing ring; 542. O-ring; 60. Clamp; 81. First glue discharge control valve; 82. Second glue discharge control valve; 83. Exhaust control valve. DETAILED DESCRIPTION

[0035] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0036] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0037] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0038] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0039] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0040] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0041] The present application provides an underwater agitator 40 for performing glue mixing operations in underwater construction or maintenance scenarios. Specifically, underwater construction or maintenance scenarios include but are not limited to underwater pipeline repair, underwater pile foundation reinforcement, submarine cable repair, and the like.

[0042] See also Figures 3 to 5The underwater agitator 40 of one embodiment includes a driving motor 41, a mixing barrel 30, a transmission shaft 43, a paddle 44 and a bearing seat 42. The mixing barrel 30 includes a barrel body 31 and a cover body 32 for sealing the barrel body 31. The cover body 32 is provided with an avoidance hole. One end of the transmission shaft 43 is connected to the output shaft of the driving motor 41, and the other end of the transmission shaft 43 passes through the avoidance hole and extends into the barrel body 31. A mechanical seal 53 is provided between the transmission shaft 43 and the cover body 32. The paddle 44 is connected to the transmission shaft 43, and the paddle 44 is located in the mixing barrel 30. The bearing seat 42 is sleeved on the outside of the transmission shaft 43, and one end of the bearing seat 42 is sealed with the cover body 32. A first seal 51 is provided between the bearing seat 42 and the cover body 32. The other end of the bearing seat 42 is sealed with the driving motor 41. A second seal 52 is provided between the bearing seat 42 and the driving motor 41.

[0043] The mechanical seal 53, also known as an end face seal, is a shaft sealing device used in rotating fluid machinery. It consists of at least one pair of end faces perpendicular to the axis of rotation. Under the influence of fluid pressure, the elastic force (or magnetic force) of a compensating mechanism, and the cooperation of an auxiliary seal, these end faces maintain contact and slide relative to each other, preventing fluid leakage. Both the first seal 51 and the second seal 52 can be silicone gaskets.

[0044] The underwater agitator 40 rotates the drive shaft 43 via the drive motor 41, thereby driving the paddles 44 to mix the colloid within the mixing drum 30. A mechanical seal 53 is provided between the drive shaft 43 and the cover 32. This seal effectively seals the clearance between the drive shaft 43 and the cover 32, preventing colloid from leaking through the clearance opening into the bearing seat 42 and contaminating the bearing 45 or the drive motor 41 while maintaining rotation of the drive shaft 43 relative to the cover 32. The bearing 45 supports and secures the drive shaft 43, ensuring stability during rotation and preventing deformation or damage due to uneven force or excessive friction. In addition, by arranging the bearing 45 in the bearing seat 42, and sealingly connecting one end of the bearing seat 42 to the cover body 32, and sealingly connecting the other end of the bearing seat 42 to the drive motor 41, on the one hand, the installation and fixation of the bearing seat 42 motor is achieved, and on the other hand, the sealing performance of the bearing seat 42 is ensured, preventing water from entering the bearing 45 shaft seat and damaging the bearing 45 or the drive motor 41, so that the underwater mixer 40 can be suitable for underwater construction environments.

[0045] See also Figure 5In one embodiment, the cover body 32 includes a cover plate 321 and a connecting portion 322. The cover plate 321 seals the avoidance hole of the barrel body 31. The connecting portion 322 is protruding from the cover plate 321 and surrounds the outer periphery of the avoidance hole. The end of the connecting portion 322 facing away from the cover plate 321 is sealed with the bearing seat 42. A first sealing member 51 is disposed between the connecting portion 322 and the bearing seat 42. By surrounding the avoidance hole with the connecting portion 322 and disposing the first sealing member 51 between the connecting portion 322 and the bearing seat 42, in conjunction with the mechanical seal 53 between the transmission shaft 43 and the cover body 32, a double seal is formed from the water area to the interior of the barrel body 31, effectively preventing water from the water area from entering the mixing barrel 30 and further improving the applicability of the underwater agitator 40 in water.

[0046] See also Figure 5 In one embodiment, a first flange 323 is provided on the end of the connection portion 322 facing away from the cover plate 321. A second flange 421 is provided on the end of the bearing seat 42 proximal to the cover body 32. The first flange 323 and the second flange 421 are butted against each other, and a first seal 51 is disposed between the first flange 323 and the second flange 421. The underwater agitator 40 also includes a clamp 60 that clamps onto the first flange 323 and the second flange 421. By disposing the first seal 51 between the first flange 323 and the second flange 421, the contact area between the first seal 51, the connection portion 322, and the bearing seat 42 is increased, thereby improving the sealing effect. At the same time, by clamping the clamp 60 on the outside of the first flange 323 and the second flange 421, while ensuring that the cover body 32 and the bearing seat 42 are firmly connected, the clamp 60 is used to further seal the fitting gap between the first flange 323 and the second flange 421, thereby further improving the sealing effect between the cover body 32 and the bearing seat 42.

[0047] See also Figure 5 In one embodiment, an end cap 422 is provided at the end of the bearing housing 42 facing away from the cover body 32. The drive motor 41 includes a waterproof housing with a support 412 fixedly connected to the end cap 422. A second sealing member 52 is disposed between the support 412 and the end cap 422. The waterproof housing effectively prevents water from entering the interior of the drive motor 41, thereby protecting the electronic components within the drive motor 41. By disposing the second sealing member 52 between the end cap 422 and the support 412, the contact area between the second sealing member 52, the drive motor 41, and the bearing housing 42 is increased, thereby improving the sealing effect.

[0048] See also Figure 5In one embodiment, a positioning boss 423 is provided on the inner wall of the bearing seat 42, and a positioning step 424 is provided on the end of the positioning boss 423 near the drive motor 41. The underwater agitator 40 also includes a bearing pressure plate 425 connected to the end of the positioning boss 423 facing away from the positioning step 424. A space is formed between the bearing pressure plate 425, the positioning boss 423, and the positioning step 424 to accommodate and limit the position of the bearing 45. The positioning boss 423 radially limits the bearing 45, while the positioning step 424 and the bearing pressure plate 425 respectively limit the bearing 45 axially at both ends. This effectively secures the bearing 45 and prevents it from shaking during the rotation of the drive shaft 43, thereby improving the rotational stability of the drive shaft 43.

[0049] See also Figure 5 In one embodiment, a sealing assembly 54 is provided between the bearing pressure plate 425 and the bearing 45. The sealing assembly 54 seals the gap between the bearing pressure plate 425 and the bearing 45. Thus, if the first seal 51 or the mechanical seal 53 fails, the sealing assembly 54 can form a secondary sealing protection to prevent water or colloid from continuing to rise and damaging the drive motor 41.

[0050] Furthermore, the sealing assembly 54 includes an elastic sealing ring 541 and an O-ring 542. One end of the elastic sealing ring 541 abuts the bearing pressure plate 425, and the other end of the elastic sealing ring 541 abuts the bearing 45. The O-ring sleeve 542 is disposed outside the elastic sealing ring 541 and abuts the positioning boss 423. The elastic sealing ring 541 and the O-ring 542 form a double seal between the bearing 45 and the bearing pressure plate 425, further improving the sealing effect. Alternatively, the elastic sealing ring 541 may be a rubber sealing ring.

[0051] Optionally, in one embodiment, the driving motor 41 is a pneumatic motor. In this way, the pneumatic motor can be driven by an air circuit, thereby preventing the driving motor 41 from generating a risk of electric leakage during underwater operation, making the underwater agitator 40 more suitable for underwater operation environments.

[0052] See also Figure 4 In one embodiment, the number of the blades 44 is multiple, and the blades 44 are spaced apart along the circumferential direction and the axial direction of the rotating shaft. This can improve the mixing uniformity of the colloid in the mixing barrel 30.

[0053] Alternatively, in one embodiment, see Figure 3 The cover 32 is further provided with a glue inlet 301, which is used to inject glue into the mixing barrel 30. The barrel 31 is also provided with a glue outlet, which is used to output the mixed glue after stirring.

[0054] See also Figure 1 as well as Figure 2The present application also provides an underwater glue injection system. The underwater glue injection system of one embodiment includes the underwater agitator 40 of any of the above embodiments.

[0055] The underwater agitator 40 of the underwater glue injection system described above rotates the drive shaft 43 via the drive motor 41, thereby driving the paddles 44 to mix the colloid within the mixing barrel 30. A mechanical seal 53 is provided between the cover 32 and the cover 32. This effectively seals the clearance between the drive shaft 43 and the cover 32, preventing colloid from leaking through the clearance opening into the bearing seat 42 and contaminating the bearing 45 or the drive motor 41 without affecting the rotation of the drive shaft 43 relative to the cover 32. The bearing 45 supports and secures the drive shaft 43, ensuring its stability during rotation and preventing deformation or damage due to uneven force or excessive friction. In addition, by arranging the bearing 45 in the bearing seat 42, and sealingly connecting one end of the bearing seat 42 to the cover body 32, and sealingly connecting the other end of the bearing seat 42 to the drive motor 41, on the one hand, the installation and fixation of the bearing seat 42 motor is achieved, and on the other hand, the sealing performance of the bearing seat 42 is ensured, preventing water from entering the bearing 45 shaft seat and damaging the bearing 45 or the drive motor 41, so that the underwater mixer 40 can be suitable for underwater construction environments.

[0056] Specifically, in one embodiment, the underwater glue injection system also includes an air source, a control panel 10 and a glue storage barrel 20, the control panel 10 is connected to the air source, the control panel 10 is provided with a glue injection air path and a stirring air path connected to the air source, the control panel 10 is also provided with a glue injection stop valve 11 for adjusting the glue injection air path switch and flow rate, and a stirring stop valve 12 for adjusting the stirring air path switch and flow rate; the glue storage barrel 20 is provided with a first air inlet 21 and a first glue outlet 22, the first air inlet 21 is connected to the glue injection air path; the stirring barrel 30 is provided with a glue inlet 301, a second glue outlet 303 and a first exhaust port, the glue inlet 301 is connected to the first glue outlet 22, a first glue outlet control valve 81 is provided between the glue inlet 301 and the first glue outlet 22, the second glue outlet 303 is connected to the second glue outlet control valve 82, and the first exhaust port is connected to the exhaust control valve 83; the drive motor 41 is provided with a second air inlet 411, and the second air inlet 411 is connected to the stirring air path.

[0057] Specifically, during actual operation, a proper amount of glue A is pre-installed in the glue storage barrel 20, a proper amount of glue B is pre-installed in the mixing barrel 30, and then the underwater part is sunk to the operation site.

[0058] Then, open the glue injection stop valve 11, the first glue discharge control valve 81 and the exhaust control valve 83 in sequence, so that the glue A in the glue storage barrel 20 enters the mixing barrel 30 under the drive of the air pressure of the glue injection air circuit. After all the glue A in the glue storage barrel 20 enters the mixing barrel 30, close the glue injection stop valve 11, the first glue discharge control valve 81 and the exhaust control valve 83 in sequence.

[0059] Then, the stirring stop valve 12 is opened so that the driving motor 41 drives the paddle 44 under the air pressure of the stirring air path to mix the glue A and the glue B in the stirring barrel 30. After the underwater stirrer 40 stirs for a preset time so that the glue A and the glue B are fully mixed to form a mixed glue, the stirring stop valve 12 is closed.

[0060] The glue injection stop valve 11, the first glue outlet control valve 81 and the second glue outlet control valve 82 are opened in sequence, so that the mixed glue in the mixing barrel 30 is discharged from the second glue outlet 303 under the pressure of the glue injection air circuit and injected into the target area.

[0061] When the glue injection is completed, the second glue discharge control valve 82, the first glue discharge control valve 81 and the glue injection stop valve 11 are closed in sequence to prevent water from flowing back into the mixing barrel 30, thereby completing the glue injection.

[0062] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An underwater agitator, characterized in that: include: Drive motor; A mixing barrel, comprising a barrel body and a cover for sealing the barrel body, wherein the cover body is provided with an avoidance hole; a transmission shaft, one end of which is connected to the output shaft of the drive motor, the other end of which passes through the avoidance hole and extends into the barrel body, and a mechanical seal is provided between the transmission shaft and the cover body; a paddle connected to the transmission shaft and located in the mixing barrel; A bearing seat, wherein the bearing seat is sleeved outside the transmission shaft, and one end of the bearing seat is sealed with the cover body, a first seal is provided between the bearing seat and the cover body, and the other end of the bearing seat is sealed with the drive motor, and a second seal is provided between the bearing seat and the drive motor.

2. The underwater agitator according to claim 1, characterized in that: The bearing seat and the cover body include: a cover plate, the cover plate sealing the barrel body, the avoidance hole being provided on the cover plate; A connecting portion protrudes from the cover plate, the connecting portion is arranged around the outer periphery of the avoidance hole, the end of the connecting portion facing away from the cover plate is sealed with the bearing seat, and the first sealing member is arranged between the connecting portion and the bearing seat.

3. The underwater agitator according to claim 2, characterized in that: A first flange is provided on an end of the connecting portion facing away from the cover plate, and a second flange is provided on an end of the bearing seat close to the cover body. The first flange is butted against the second flange, and the first sealing member is provided between the first flange and the second flange. The underwater agitator further comprises a clamping member, which is clamped on the first flange and the second flange.

4. The underwater agitator according to claim 1, characterized in that: An end cover is provided at one end of the bearing seat away from the cover body. The drive motor includes a waterproof shell. The waterproof shell is provided with a support. The support is fixedly connected to the end cover. The second seal is arranged between the support and the end cover.

5. The underwater agitator according to claim 1, characterized in that: A positioning boss is provided on the inner wall of the bearing seat, and a positioning step is provided on the end of the positioning boss close to the driving motor; the underwater mixer also includes a bearing pressure plate, which is connected to the end of the positioning boss away from the positioning step, and a limiting space is formed between the bearing pressure plate, the positioning boss and the positioning step for accommodating the bearing and limiting the position of the bearing.

6. The underwater agitator according to claim 5, characterized in that: A sealing assembly is provided between the bearing pressure plate and the bearing.

7. The underwater agitator according to claim 6, characterized in that: The sealing assembly includes an elastic sealing ring and an O-ring, one end of the elastic sealing ring abuts against the bearing pressure plate, the other end of the elastic sealing ring abuts against the bearing, and the O-ring is sleeved outside the elastic sealing ring and abuts against the positioning boss.

8. The underwater agitator according to claim 6, characterized in that: The driving motor is a pneumatic motor.

9. The underwater agitator according to claim 6, characterized in that: There are multiple blades, and the blades are spaced apart along the circumferential direction and the axial direction of the rotating shaft.

10. An underwater glue injection system, characterized in that: The underwater agitator comprises the underwater agitator according to any one of claims 1 to 9.

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