A tail shaft sealing device with leakage alarm function

Abstract

The utility model discloses a tail shaft sealing device with a leakage alarm function, which relates to the field of tail shaft sealing technology, including a sealing box, wherein the third limit block is symmetrically arranged in the sealing box, the third limit block is clamped with a third sealing ring, a water stop strip is arranged between two groups of the third limit blocks, a first limit block and a first sealing ring are arranged to seal the tail shaft once, and a group of the third limit block and the third sealing ring are used to seal the tail shaft twice. When the two groups of sealing rings are aged and damaged, water will be absorbed by the water stop strip, and the water stop strip will expand and become larger, driving the pressing block to move, and a touch alarm will sound an alarm to remind people to replace the sealing ring. When the ship is sailing and the sealing ring cannot be replaced in time, the tail shaft is sealed three times under the action of another group of the third limit block and the third sealing ring, and the second limit block and the second sealing ring are sealed four times to avoid the entry of water and ensure navigation safety.

Description

Technical Field

[0001] The utility model relates to the technical field of tail shaft sealing, in particular to a tail shaft sealing device with a leakage alarm function. Background Art

[0002] The stern shaft, also known as the tail shaft, is the last section of the shaft system. The head end flange and the intermediate shaft flange are connected with tight-fitting bolts. The tail end is conical in shape and is used to install the propeller. The stern shaft is forged with high-quality carbon steel. The ship's tail shaft sealing device is one of the important components of the ship's shaft system. In the sealing device of the existing technology, the main part used for waterproofing is the sealing ring, but the sealing ring is mostly made of rubber, which is prone to aging after long-term use. Seawater will penetrate into the interior of the ship's tail shaft, affecting the normal operation of the ship.

[0003] After searching the existing public patent number: CN202123335103.8, the public patent name is: A ship tail shaft sealing device, specifically relating to the technical field of sealing devices, including a first cover, a first sealing ring is provided at the bottom end of the interior of the first cover, the first sealing ring is fixedly arranged inside the first cover, a water stop strip is provided on the top of the first sealing ring, the water stop strip is fixedly arranged inside the first cover, an annular groove is provided at the bottom of the outer end of the first cover, and a plurality of plug rods are inserted into the interior of the first cover. The utility model installs a water stop strip on the top of the first sealing ring. Once the first sealing ring ages and seawater seeps in, the water stop strip will absorb water and expand to block the seawater and also push the plug rod to move so that it contacts the buzzer, so that the buzzer can be triggered by touching the switch, and the buzzer will sound an alarm to remind the workers to replace the new first sealing ring in time to ensure the normal operation of the ship.

[0004] However, when the ship tail shaft sealing device in the above application is used, the sealing ring ages and water enters, which often makes it impossible to repair it immediately. The sealing is poor and there is still a risk of water entering. Because high pressure and high-speed rotation generate heat, the internal sealing elements are thermally deformed, and the internal high temperature cannot be dissipated, which can easily cause damage to the tail shaft. Therefore, there are certain limitations. Utility Model Content

[0005] (1) Technical problems solved

[0006] In response to the deficiencies of the prior art, the utility model provides a tail shaft sealing device with a leakage alarm function, which solves the problem that there is less sealing, there is still a risk of water ingress, and thermal deformation of internal sealing elements affects the sealing.

[0007] (2) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a tail shaft sealing device with a leakage alarm function, comprising: a sealing box, a mounting bracket symmetrically provided on the bottom of the sealing box, mounting holes symmetrically provided on the surface of the mounting bracket, a first limit block provided in the sealing box, a first sealing ring clamped in the first limit block, a second limit block fixedly connected in the sealing box, a second sealing ring clamped in the second limit block, a tail shaft inserted in the sealing box, and a leakage alarm component provided in the sealing box;

[0009] The leakage alarm assembly includes a third limit block, which is symmetrically arranged in the sealing box. A third sealing ring is clamped in the third limit block. A water stop strip is arranged between two groups of the third limit blocks. A pressing block is fixedly connected to the surface of the water stop strip. A touch alarm is symmetrically arranged on the surface of the sealing box, and the touch alarm is arranged corresponding to the pressing block.

[0010] Preferably, the first limiting block and the second limiting block have the same size, and limiting grooves are provided on the surfaces of the first limiting block and the second limiting block, and through holes are provided in the limiting grooves.

[0011] Preferably, the through hole is the same size as the tail shaft, the depth of the limiting groove is the same as the depth of the first sealing ring, and the first sealing ring is the same size as the second sealing ring.

[0012] Preferably, a heat dissipation assembly is provided on the sealed box, the third limit block and the first sealing ring divide the sealed box into a first heat dissipation chamber, the third limit block and the second limit block divide the sealed box into a second heat dissipation chamber, the second heat dissipation chamber is connected to the first heat dissipation chamber through a circulation pipe and a heat dissipation pipe respectively, and the surface of the heat dissipation pipe is connected to a heat dissipation plate in an equidistant array.

[0013] Preferably, the heat dissipation pipe is arranged above the sealed box, the circulation pipe is arranged below the sealed box, and the surface of the heat dissipation pipe is connected to a refueling pipe.

[0014] Preferably, the heat dissipation plate is configured as a metal plate, and a cavity is provided inside the heat dissipation plate.

[0015] Preferably, the first sealing ring and the second sealing ring are both made of rubber, the third sealing ring has the same size as the first sealing ring, and the third limiting block also has a limiting groove.

[0016] Beneficial effects

[0017] The utility model provides a tail shaft sealing device with a leakage alarm function, which has at least the following beneficial effects compared with the prior art:

[0018] A first limit block and a first sealing ring are set to seal the tail shaft once, and a third limit block and a third sealing ring are used to seal the tail shaft for the second time. When the two sets of sealing rings are aged and damaged, water will be absorbed by the waterstop strip, and the waterstop strip will expand and become larger, driving the pressing block to move, and the touch alarm will sound an alarm to remind people to replace the sealing ring. When the ship is sailing and the sealing ring cannot be replaced in time, the tail shaft is sealed for the third time under the action of another set of third limit blocks and the third sealing ring, and the second limit block and the second sealing ring are sealed for the fourth time to prevent water from entering and ensure navigation safety.

[0019] When the tail shaft rotates, friction with the sealing ring generates heat, which is absorbed by the lubricating fluid in the first heat dissipation cavity and the second heat dissipation cavity. The lubricating fluid flows from the first heat dissipation cavity into the second heat dissipation cavity along the heat dissipation pipe, and the lubricating fluid is dissipated through the heat dissipation plate, thereby reducing the thermal deformation of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the utility model;

[0021] Figure 2 This is a structural diagram of the leakage alarm component of the utility model;

[0022] Figure 3 This is a schematic cross-sectional view of the utility model;

[0023] Figure 4 This is a schematic structural diagram of the limit slot of the utility model.

[0024] In the figure: 1. Sealing box; 2. Mounting bracket; 3. Mounting hole; 4. Tail shaft; 5. First limit block; 6. First sealing ring; 7. Second limit block; 8. Second sealing ring; 9. Leakage alarm assembly; 901. Third limit block; 902. Third sealing ring; 903. Water stop strip; 904. Press block; 905. Touch alarm; 10. Heat dissipation assembly; 1001. First heat dissipation cavity; 1002. Second heat dissipation cavity; 1003. Circulation pipe; 1004. Heat dissipation pipe; 1005. Heat dissipation plate; 11. Limiting groove; 12. Through hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example 1:

[0027] See also Figure 1-4 The utility model provides a technical solution: a sealed box 1, a mounting bracket 2 is symmetrically provided at the bottom of the sealed box 1, and a mounting hole 3 is symmetrically provided on the surface of the mounting bracket 2, a first limit block 5 is provided in the sealed box 1, a first sealing ring 6 is clamped in the first limit block 5, a second limit block 7 is fixedly connected in the sealed box 1, a second sealing ring 8 is clamped in the second limit block 7, a tail shaft 4 is inserted in the sealed box 1, and a leakage alarm component 9 is provided in the sealed box 1; the leakage alarm component 9 includes a third limit block 901, the third limit block 901 is symmetrically provided in the sealed box 1, a third sealing ring 902 is clamped in the third limit block 901, a water stop strip 903 is provided between the two groups of third limit blocks 901, a pressing block 904 is fixedly connected to the surface of the water stop strip 903, and a touch alarm 905 is symmetrically provided on the surface of the sealed box 1, and the touch alarm 905 is corresponding to the pressing block 904.

[0028] Analysis of the above content: The third sealing ring 902 is installed and positioned by the third limit block 901, and the tail shaft 4 is sealed by the third sealing ring 902 to prevent the ingress of seawater. The first limit block 5 and the first sealing ring 6 cooperate with each other to achieve a primary seal of the tail shaft 4, preventing seawater from entering the sealing box 1. When the first sealing ring 6 is damaged, the seawater will be blocked by the third limit block 901 and the third sealing ring 902. When the third sealing ring 902 is damaged, the water stop strip 903 absorbs the water and expands, driving the pressing block 904 to move. The pressing and touching alarm 905 sounds an alarm, reminding people to replace the sealing ring.

[0029] Example 2:

[0030] See also Figure 1-4 The present invention provides a technical solution based on the first embodiment: the first limit block 5 and the second limit block 7 have the same size, and the first limit block 5 and the second limit block 7 are both provided with a limit groove 11 on their surfaces, and a through hole 12 is provided in the limit groove 11.

[0031] Analyzing the above contents: the through hole 12 is provided to facilitate the passage of the tail shaft 4, and the limiting groove 11 is provided to facilitate the installation of the sealing ring.

[0032] Example 3:

[0033] See also Figure 1-4 The present invention provides a technical solution based on the first embodiment: the through hole 12 is the same size as the tail shaft 4, the depth of the limiting groove 11 is the same as the depth of the first sealing ring 6, and the first sealing ring 6 is the same size as the second sealing ring 8.

[0034] Analyzing the above content: the first sealing ring 6 is clamped in the limiting groove 11 , and the second sealing ring 8 is also clamped in the limiting groove 11 , so as to seal the tail shaft 4 step by step.

[0035] Example 4:

[0036] See also Figure 1-4 The present invention provides a technical solution based on the first embodiment: a heat dissipation assembly 10 is provided on the sealed box 1, the third limit block 901 and the first sealing ring 6 divide the sealed box 1 into a first heat dissipation chamber 1001, the third limit block 901 and the second limit block 7 divide the sealed box 1 into a second heat dissipation chamber 1002, the second heat dissipation chamber 1002 is connected to the first heat dissipation chamber 1001 through a circulation pipe 1003 and a heat dissipation pipe 1004 respectively, and a heat dissipation plate 1005 is connected to the surface of the heat dissipation pipe 1004 in an equidistant array.

[0037] Analysis of the above content: Under the action of heat, the lubricating oil in the first heat dissipation cavity 1001 and the second heat dissipation cavity 1002 moves through the heat dissipation pipe 1004 and the circulation pipe 1003, and the lubricating oil flows through the heat dissipation plate 1005 to exchange heat with the air, thereby dissipating the heat of the lubricating oil and avoiding leakage caused by thermal deformation of the rubber ring.

[0038] Embodiment 5:

[0039] See also Figure 1-4 The present invention provides a technical solution based on the first embodiment: the heat dissipation pipe 1004 is arranged above the sealed box 1, the circulation pipe 1003 is arranged below the sealed box 1, and the surface of the heat dissipation pipe 1004 is connected to the refueling pipe.

[0040] Analysis of the above content: a refueling pipe is provided to fill the first heat dissipation cavity 1001 and the second heat dissipation cavity 1002 with lubricating oil. The lubricating oil can not only lubricate the tail shaft 4 but also dissipate heat for the sealing ring.

[0041] Example 6:

[0042] See also Figure 1-4 Based on the first embodiment, the present invention provides a technical solution: the heat sink 1005 is a metal plate with a cavity defined therein. The first and second sealing rings 6 and 8 are both made of rubber. The third sealing ring 902 is the same size as the first sealing ring 6, and the third stopper 901 also has a limit groove 11.

[0043] Analysis of the above content: Metal plates have better heat dissipation effect and help dissipate heat from the lubricating fluid.

[0044] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0045] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tail shaft sealing device with a leakage alarm function, characterized in that: include: A sealing box (1), wherein a mounting frame (2) is symmetrically arranged at the bottom of the sealing box (1), and mounting holes (3) are symmetrically arranged on the surface of the mounting frame (2); a first limit block (5) is arranged inside the sealing box (1), and a first sealing ring (6) is clamped inside the first limit block (5); a second limit block (7) is fixedly connected inside the sealing box (1), and a second sealing ring (8) is clamped inside the second limit block (7); a tail shaft (4) is inserted into the sealing box (1), and a leakage alarm component (9) is arranged inside the sealing box (1); The leakage alarm component (9) comprises a third limit block (901), the third limit block (901) is symmetrically arranged in the sealing box (1), a third sealing ring (902) is clamped in the third limit block (901), a water stop strip (903) is arranged between two groups of the third limit blocks (901), a pressing block (904) is fixedly connected to the surface of the water stop strip (903), and a touch alarm (905) is symmetrically arranged on the surface of the sealing box (1), and the touch alarm (905) and the pressing block (904) are arranged correspondingly.

2. A tail shaft sealing device with leakage alarm function according to claim 1, characterized in that: The first limiting block (5) and the second limiting block (7) have the same size, and both the first limiting block (5) and the second limiting block (7) have limiting grooves (11) on their surfaces, and a through hole (12) is provided in the limiting grooves (11).

3. The tail shaft sealing device with leakage alarm function according to claim 2, characterized in that: The through hole (12) has the same size as the tail shaft (4), the depth of the limiting groove (11) has the same depth as the first sealing ring (6), and the first sealing ring (6) has the same size as the second sealing ring (8).

4. The tail shaft sealing device with leakage alarm function according to claim 1, characterized in that: The sealed box (1) is provided with a heat dissipation assembly (10); the third limit block (901) and the first sealing ring (6) divide the sealed box (1) into a first heat dissipation chamber (1001); the third limit block (901) and the second limit block (7) divide the sealed box (1) into a second heat dissipation chamber (1002); the second heat dissipation chamber (1002) is connected to the first heat dissipation chamber (1001) via a circulation pipe (1003) and a heat dissipation pipe (1004) respectively; and the surface of the heat dissipation pipe (1004) is connected to heat dissipation plates (1005) in an equidistant array.

5. The tail shaft sealing device with leakage alarm function according to claim 4, characterized in that: The heat dissipation pipe (1004) is arranged above the sealed box (1), the circulation pipe (1003) is arranged below the sealed box (1), and the surface of the heat dissipation pipe (1004) is connected to a refueling pipe.

6. The tail shaft sealing device with leakage alarm function according to claim 4, characterized in that: The heat dissipation plate (1005) is configured as a metal plate, and a cavity is provided inside the heat dissipation plate (1005).

7. The tail shaft sealing device with leakage alarm function according to claim 2, characterized in that: The first sealing ring (6) and the second sealing ring (8) are both made of rubber, the third sealing ring (902) has the same size as the first sealing ring (6), and the third limiting block (901) is also provided with a limiting groove (11).

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