Fixing device for epoxy baffle of stern tube

Abstract

The invention relates to the technical field of ship stern tube construction, in particular to a stern tube epoxy baffle fixing device which comprises stern tube bodies and a connecting steel casting, the stern tube bodies are fixed to the two ends of the outer side of the connecting steel casting, and threads are fixed to the ends, close to each other, of the outer sides of the two stern tube bodies. Epoxy baffle assemblies are assembled at the ends, close to each other, of the two stern tube bodies and located on the outer sides of the connecting steel castings, pressure applying mechanisms used for driving the semi-arc baffles to be sealed with the stern tube bodies are arranged on the outer sides of the stern tube bodies, the pressure applying mechanisms comprise threaded rotating rings and traction claws, and the traction claws are assembled on the outer sides of the threaded rotating rings. One end, far away from the threaded rotating ring, of the traction claw is abutted against and contacted with the semi-arc-shaped baffle; the part between the stern tube body and the continuous steel casting is effectively sealed through the epoxy baffle assembly, so that water is prevented from permeating into the part between the stern tube body and the continuous steel casting, and a water source is prevented from entering the stern tube.

Description

Technical Field

[0001] This invention relates to the field of ship stern tube construction technology, and in particular to a fixing device for an epoxy baffle plate in the stern tube. Background Technology

[0002] In the epoxy casting process of the stern tube of newly built ships, baffles are needed to isolate the casting area to ensure the quality of epoxy material molding. Existing technologies have evolved from welding to bolting for baffle fixing: welding requires hot work within the confined space of the stern tube cooling water tank, posing safety hazards; while bolting solves the hot work problem, it has significant drawbacks in actual construction.

[0003] When using the above technology, the following technical problems were found in the existing technology: the existing technology will produce micro-expansion in volume during the epoxy curing process, resulting in compressive stress between the baffle and the stern tube bearing. Traditional bolts are prone to "seizing" under the influence of this stress. At the same time, the humidity in the cooling water tank is high and water is easy to accumulate. The bolts are prone to corrosion due to long-term contact with water vapor, which further increases the difficulty of disassembly. In addition, bolt removal requires circumferential operations in a confined space, which is not only time-consuming and labor-intensive, but may also cause bolt stripping due to limited tool operation, increasing construction costs. To address this, we designed a fixing device for the stern tube epoxy baffle to provide an alternative technical solution to the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide a fixing device for an epoxy baffle in the stern tube, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A fixing device for an epoxy baffle in a stern tube includes a stern tube body and a continuously cast steel component. Both ends of the continuously cast steel component are fixed with stern tube bodies. Spiral threads are fixed to the outer ends of the two stern tube bodies that are close to each other. An epoxy baffle assembly is fitted to the outer ends of the two stern tube bodies that are close to each other and located on the outer side of the continuously cast steel component. A pressure-applying mechanism is provided on the outer side of the stern tube body for driving a semi-circular baffle to seal against the stern tube body. The pressure-applying mechanism includes a threaded swivel and a traction claw. A traction claw is fitted to the outer side of the threaded swivel, and the end of the traction claw away from the threaded swivel makes contact with the semi-circular baffle.

[0006] The outer side of the spiral pattern is threadedly connected to the threaded swivel ring, and the outer side of the inner side of the threaded swivel ring is provided with four drive grooves, and the inner side of the drive groove is slidably connected to one end of the traction claw.

[0007] The outer thread of the threaded swivel is connected to a limit bolt, and the bottom end of the limit bolt is connected to the stern tube body.

[0008] The drive slot is opened at an angle of inclination, and the traction claw is Z-shaped.

[0009] The semi-circular baffle is fixed with a sealing ring at one end near the stern tube body, and the sealing ring is slidably connected to the stern tube body at the other end away from the semi-circular baffle.

[0010] A sealing ring is fitted onto the outer side of the continuously cast steel part, at the end where the two stern tube bodies are far apart from each other.

[0011] The epoxy baffle assembly includes a semi-circular baffle, a limiting block, a transmission rod, a handwheel, and a sealing gasket. Limiting blocks are fixed to the outer ends of the two semi-circular baffles that are close to each other. A transmission rod is rotatably connected to one of the limiting blocks. A handwheel is rotatably connected to the end of the transmission rod away from one of the limiting blocks. The outer side of the transmission rod is slidably connected to the other limiting block, and the outer side of the handwheel is slidably connected to the other limiting block.

[0012] The connection point between the transmission rod and the handwheel is offset from the center of the handwheel.

[0013] Each of the two semi-circular baffles is fitted with a sealing gasket at one end that is close to the other.

[0014] The transmission rod is fitted with a gasket on its outer side, and another limiting block is slidably connected to the handwheel with the gasket, while the outer side of the gasket is resistively connected to the handwheel.

[0015] It is clear without a doubt that the technical solution described above in this application can solve the technical problem that this application aims to address.

[0016] Compared with existing technologies, the advantages of this invention are as follows: In traditional bolt fixing methods, the slight expansion of epoxy curing volume generates compressive stress, which easily causes the bolts to "seize." Furthermore, bolts are prone to corrosion in the high-humidity, water-filled cooling water tank, and disassembling them one by one in a confined space is time-consuming and labor-intensive. This invention, through the design of the pressure application mechanism and epoxy baffle assembly, avoids the use of bolts. Disassembly does not require circumferential operations in a confined space, reducing disassembly difficulty and saving time and manpower. Through the synergistic effect of multiple sealing structures, the setting of components such as sealing rings, sealing gaskets and sealing rings effectively enhances the sealing effect between the stern tube body and the continuously cast steel parts, as well as the epoxy baffle assembly itself, ensuring effective isolation from external water sources. The assembly design of the two semi-circular baffles, combined with the handwheel, transmission rod and limit block, makes it easy to disassemble, replace and maintain the two semi-circular baffles. In addition, the Z-shaped traction claw reduces the space occupied by the shape and is more suitable for narrow working environments. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure between the stern tube body and the epoxy baffle assembly of the present invention; Figure 3 This is a schematic diagram of the structure between the threaded swivel and the semi-arc baffle of the present invention; Figure 4 This is a schematic diagram of the structure between the outer side of the stern tube body and the spiral pattern of the present invention; Figure 5 This is a schematic diagram of the structure between the threaded swivel and the traction claw of the present invention; Figure 6 This is a schematic diagram of the structure between the threaded swivel and the limiting bolt of the present invention; Figure 7 This is a schematic diagram of the structure between the semi-circular baffle and the handwheel in this invention; Figure 8 This is a schematic diagram of the structure between the limiting block and the handwheel of the present invention; Figure 9 This is a schematic diagram of the structure between the threaded swivel, the traction claw, and the semi-arc baffle of the present invention; Figure 10 This is a schematic diagram of the structure between the threaded swivel, the drive groove, and the traction claw of the present invention.

[0019] In the diagram: 1. Stern tube body; 2. Continuously cast steel parts; 3. Handwheel; 4. Epoxy baffle assembly; 5. Sealing ring; 6. Sealing gasket; 7. Semi-arc baffle; 8. Threaded swivel; 9. Drive groove; 10. Traction claw; 11. Limit bolt; 12. Spiral thread; 13. Limit block; 14. Transmission rod. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] As shown in the background technology: Existing technology will produce micro-expansion in volume during the epoxy curing process, resulting in compressive stress between the baffle and the stern tube bearing. Traditional bolts are prone to "seizing" under the influence of this stress. At the same time, the humidity in the cooling water tank is high and water is easy to accumulate. Bolts are prone to corrosion due to long-term contact with water vapor, which further increases the difficulty of disassembly. In addition, bolt removal requires circumferential operations in a confined space, which is not only time-consuming and labor-intensive, but may also cause bolt stripping due to limited tool operation, increasing construction costs.

[0022] Please see Figure 1-10 The present invention provides a technical solution: a fixing device for an epoxy baffle in a stern tube, comprising a stern tube body 1 and a continuous casting steel component 2. Both ends of the continuous casting steel component 2 are fixed with the stern tube body 1. The two stern tube bodies 1 are fixed with spiral threads 12 at their close-to-each ends. An epoxy baffle assembly 4 is assembled at the close-to-each ends of the two stern tube bodies 1 on the outside of the continuous casting steel component 2. A pressure applying mechanism is provided on the outside of the stern tube body 1 for driving a semi-arc baffle 7 to seal with the stern tube body 1. The pressure applying mechanism includes a threaded swivel ring 8 and a traction claw 10. The traction claw 10 is assembled on the outside of the threaded swivel ring 8. The end of the traction claw 10 away from the threaded swivel ring 8 is in contact with the semi-arc baffle 7. When the epoxy baffle assembly 4 is disassembled using the traditional bolt fixing method, the slight volume expansion during the epoxy curing process causes compressive stress between the baffle and the stern tube bearing. Traditional bolts are prone to "seizing" under this stress. The high humidity and water accumulation in the cooling water tank make the bolts susceptible to corrosion due to long-term contact with water vapor, further increasing the difficulty of disassembly. Moreover, bolt disassembly requires circumferential operation in a confined space, which is not only time-consuming and labor-intensive. The present invention improves upon the above-mentioned background technology by effectively sealing the stern tube body 1 and the continuous casting steel part 2 through the epoxy baffle assembly 4, thereby preventing water from seeping into the stern tube body 1 and the continuous casting steel part 2 and avoiding water from entering the interior of the stern tube. At this time, the pressure application mechanism drives the two semi-circular baffles 7 to seal between the stern tube body 1 and the continuous casting steel part 2, thereby improving the sealing isolation between the stern tube and the external water source. The main pressure application mechanism effectively disassembles and applies pressure to the epoxy baffle assembly 4 in order to increase the sealing effect between the stern tube body 1 and the continuous casting steel part 2 and facilitate disassembly and replacement. The outer side of the spiral 12 is threadedly connected to the threaded ring 8. The outer side of the inner side of the threaded ring 8 is provided with four drive grooves 9. The inner side of the drive grooves 9 is slidably connected to one end of the traction claw 10. The outer side of the threaded ring 8 is threadedly connected to the limit bolt 11. The bottom end of the limit bolt 11 is resistively connected to the stern tube body 1. Specifically, when it is necessary to seal the gap between the stern tube body 1 and the continuous casting steel part 2, the two semi-circular baffles 7 are spliced ​​together to form a complete epoxy baffle assembly 4. The epoxy baffle assembly 4 effectively seals the gap between the stern tube body 1 and the continuous casting steel part 2 and isolates the water source. The drive groove 9 is opened at an angle of inclination, and the traction claw 10 is Z-shaped. It is connected to the spiral thread 12 by rotating the threaded ring 8. The threaded ring 8 drives the traction claw 10 to rotate along the inclination of the drive groove 9. The threaded ring 8 guides the traction claw 10 to apply pressure to the two semi-arc baffles 7 under the inclination of the drive groove 9, thereby effectively increasing the sealing effect between the semi-arc baffles 7 and the stern tube body 1 and the continuous casting steel part 2. Finally, the limit bolt 11 is used to position the rotation angle of the threaded swivel 8 to prevent the threaded swivel 8 from reversing under the stress of the traction claw 10. The Z-shaped shape of the traction claw 10 effectively reduces the space occupied by the shape. A sealing ring 5 is fixed at one end of the semi-circular baffle 7 near the stern tube body 1. The end of the sealing ring 5 away from the semi-circular baffle 7 is slidably connected to the stern tube body 1. The sealing ring 5 effectively improves the sealing quality between the two semi-circular baffles 7 and the stern tube body 1 and the continuous casting steel part 2. A sealing ring is fitted on the outer side of the continuously cast steel part 2 and at the end of the two stern tube bodies 1 that are far apart from each other. The sealing ring also prevents external water from seeping into the space between the stern tube body 1 and the continuously cast steel part 2.

[0023] Example 2 Reference Figure 7 and Figure 8 A fixing device for an epoxy baffle in a stern tube. The epoxy baffle assembly 4 includes a semi-arc baffle 7, a limiting block 13, a transmission rod 14, a handwheel 3, and a sealing gasket 6. The outer ends of the two semi-arc baffles 7 that are close to each other are fixed with limiting blocks 13. One of the limiting blocks 13 is rotatably connected to the transmission rod 14. The end of the transmission rod 14 away from one of the limiting blocks 13 is rotatably connected to the handwheel 3. The outer side of the transmission rod 14 is slidably connected to the other limiting block 13. The outer side of the handwheel 3 is slidably connected to the other limiting block 13. The connection between the transmission rod 14 and the handwheel 3 is off-center from the center of the handwheel 3. Specifically, the epoxy baffle assembly 4 is formed by two semi-circular baffles 7, and the two semi-circular baffles 7 can be effectively disassembled and replaced through the assembly between the semi-circular baffles 7. The handwheels 3 on both sides of the two semi-circular baffles 7 approach each other and apply pressure to one of the limiting blocks 13. This causes the other limiting block 13 to drive one of the semi-circular baffles 7 to apply pressure to the other limiting block 13 and the other semi-circular baffle 7. This allows the two semi-circular baffles 7 to be clamped together under the sealing action of the sealing gasket 6, which greatly promotes the disassembly and assembly of the two semi-circular baffles 7 and effectively allows for the replacement and maintenance of the two semi-circular baffles 7. Both semi-circular baffles 7 are fitted with sealing gaskets 6 at their close ends. The sealing gaskets 6 enhance the sealing effect between the two semi-circular baffles 7 and ensure the waterproof effect between the two semi-circular baffles 7 and the stern tube body 1 and the continuous casting steel part 2. A gasket is fitted on the outer side of the transmission rod 14. Another limiting block 13 is slidably connected to the handwheel 3 with the gasket. The outer side of the gasket is resistively connected to the handwheel 3. The gasket effectively protects the handwheel 3 and increases the clamping force between the two limiting blocks 13 and the semi-circular baffle 7, ensuring that the handwheel 3 applies pressure to the other limiting block 13 through the gasket.

[0024] The usage process of the fixing device for the stern tube epoxy baffle provided by the present invention is as follows: The device achieves initial sealing between the stern tube body 1 and the continuous casting steel component 2 through the epoxy baffle assembly 4. The epoxy baffle assembly 4 is composed of two semi-circular baffles 7 spliced ​​together, and a sealing gasket 6 is installed at the splice, which can improve the sealing effect between the two semi-circular baffles 7. At the same time, a sealing ring 5 is fixed at the end of the semi-circular baffle 7 near the stern tube body 1, which further enhances the sealing quality between the stern tube body 1 and the continuous casting steel component 2, and effectively prevents water from seeping into the space between them. The pressure mechanism is responsible for driving the semi-circular baffle 7 to seal with the stern tube body 1. The outer side of the stern tube body 1 has a spiral pattern 12, and the threaded swivel ring 8 is threadedly connected to the spiral pattern 12. One end of the traction claw 10 mounted on its outer side is in contact with the semi-circular baffle 7. When the threaded ring 8 is rotated, because the drive groove 9 is slidably connected to the traction claw 10, the traction claw 10 will apply pressure to the two semi-circular baffles 7 under the tilting guidance of the drive groove 9, thereby improving the sealing and isolation effect. Then, the threaded ring 8 is fixed with the limit bolt 11 to prevent the threaded ring 8 from reversing and to prevent the traction claw 10 and the two semi-circular baffles 7 from becoming loose. In the second embodiment, there are fixed limiting blocks 13 near the outer side of the two semi-circular baffles 7. One of the limiting blocks 13 is rotatably connected to the transmission rod 14. The other end of the transmission rod 14 is rotatably connected to the handwheel 3 and the connection point is off-center from the center of the handwheel 3. The outer side of the transmission rod 14 is slidably connected to the other limiting block 13. Rotating the handwheel 3 can drive the two limit blocks 13 to move closer to each other via the transmission rod 14, so that the two semi-circular baffles 7 are clamped or separated under the action of the sealing gasket 6, making it easy to disassemble and replace.

[0025] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A fixing device for a stern tube epoxy baffle, characterized in that, The device includes a stern tube body (1) and a continuous casting steel part (2). Both ends of the continuous casting steel part (2) are fixed with stern tube bodies (1). The two stern tube bodies (1) are fixed with spiral threads (12) at their close ends. An epoxy baffle assembly (4) is installed at the close ends of the two stern tube bodies (1) on the outside of the continuous casting steel part (2). A pressure-applying mechanism is provided on the outside of the stern tube body (1) to drive the semi-arc baffle (7) to seal with the stern tube body (1). The pressure-applying mechanism includes a threaded swivel (8) and a traction claw (10). The traction claw (10) is installed on the outside of the threaded swivel (8). The end of the traction claw (10) away from the threaded swivel (8) is in contact with the semi-arc baffle (7).

2. The fixing device for a stern tube epoxy baffle according to claim 1, characterized in that, The outer side of the spiral (12) is threadedly connected to the threaded ring (8). The outer side of the inner side of the threaded ring (8) is provided with four drive grooves (9). The inner side of the drive grooves (9) is slidably connected to one end of the traction claw (10).

3. The fixing device for a stern tube epoxy baffle according to claim 2, characterized in that, The outer thread of the threaded swivel (8) is connected to a limiting bolt (11), and the bottom end of the limiting bolt (11) is connected to the stern tube body (1) in a resistive manner.

4. The fixing device for a stern tube epoxy baffle according to claim 2, characterized in that, The drive groove (9) is opened at an angle of inclination, and the traction claw (10) is Z-shaped.

5. The fixing device for a stern tube epoxy baffle according to claim 4, characterized in that, A sealing ring (5) is fixed at one end of the semi-circular baffle (7) near the stern tube body (1), and the end of the sealing ring (5) away from the semi-circular baffle (7) is slidably connected to the stern tube body (1).

6. The fixing device for a stern tube epoxy baffle according to claim 3, characterized in that, A sealing ring is fitted onto the outer side of the continuously cast steel part (2) and at the end of the two stern tube bodies (1) that are far apart from each other.

7. The fixing device for a stern tube epoxy baffle according to claim 2, characterized in that, The epoxy baffle assembly (4) includes a semi-circular baffle (7), a limiting block (13), a transmission rod (14), a handwheel (3), and a sealing gasket (6). The two semi-circular baffles (7) have a limiting block (13) fixed at their outer ends that are close to each other. One of the limiting blocks (13) is rotatably connected to the transmission rod (14). The end of the transmission rod (14) away from one of the limiting blocks (13) is rotatably connected to the handwheel (3). The outer side of the transmission rod (14) is slidably connected to the other limiting block (13), and the outer side of the handwheel (3) is slidably connected to the other limiting block (13).

8. The fixing device for a stern tube epoxy baffle according to claim 7, characterized in that, The connection point between the transmission rod (14) and the handwheel (3) is offset from the center of the handwheel (3).

9. A fixing device for a stern tube epoxy baffle according to claim 7, characterized in that, Both of the two semi-circular baffles (7) are fitted with sealing gaskets (6) at their close ends.

10. A fixing device for a stern tube epoxy baffle according to claim 9, characterized in that, A gasket is fitted on the outer side of the transmission rod (14), and another limiting block (13) is slidably connected to the handwheel (3) with the gasket, and the outer side of the gasket is resistively connected to the handwheel (3).

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