A lifting tool for installing a rudder bushing of a ship

Abstract

The utility model discloses a kind of hoisting tool for installing ship rudder system bushing, including pressure bearing pole, a pair of connecting flange is installed on the pressure bearing pole, at least two connecting holes are symmetrically opened on the connecting flange side wall;Still including connecting plate, telescopic sleeve, adjusting nut, telescopic rod, the telescopic rod one end is fixedly connected with connecting hole, the other end is inserted into telescopic sleeve, telescopic sleeve is fixedly installed on the inner side wall of connecting plate, the adjusting nut is installed on the telescopic rod, and the telescopic rod between adjusting nut and connecting plate is sleeved spring on telescopic sleeve, by adjusting nut screwing or loosening, spring elasticity can be adjusted, relative displacement between telescopic rod and telescopic sleeve occurs, to realize the distance adjustable between pressure bearing pole and connecting plate;The utility model is simple in structure, easy to operate, low in cost, and strong in applicability.

Description

Technical Field

[0001] This utility model belongs to the field of shipbuilding and installation technology, and in particular relates to a hoisting tool for installing ship rudder bushings. Background Technology

[0002] Currently, the method for hoisting ship rudder bushings is to lock the bushings with ropes or steel wires, then freeze them in liquid nitrogen, and finally use a crane and manpower to install the frozen bushings into the upper rudder stock bearing holes and rudder pin bearing holes. This lifting method is only suitable for lightweight bushings on small vessels. As the tonnage of ships continues to increase, taking a 300,000-ton ore carrier as an example, the rudder bushing weighs 160kg. If the above method is still used, it cannot guarantee the successful lifting of the bushing. The main reasons are: 1. The ropes or wires become brittle after being frozen with liquid nitrogen. As the weight of the load increases, there is a risk of breakage of the ropes and wires during the lifting process; 2. The toughness of the wires after freezing is higher than that of the ropes, but due to the weight of the bushing, the wires are prone to scratches, deformation, and other adverse effects on the surface of the bushing; 3. It is difficult to find the center of gravity of the bushing when using ropes or wires to lock it. After lifting, the bushing may tilt, which is inconvenient for subsequent operations; 4. When the bushing is lifted above the rudder hole, the ropes and wires must be removed. Finally, it can only be placed manually. However, the bushing weighs 160kg, which not only increases the difficulty of the work, but also makes it difficult to ensure the integrity of the bushing and the personal safety of the workers in a confined space. Summary of the Invention

[0003] In view of the above problems, the purpose of this utility model is to overcome the shortcomings of the existing technology and provide a lifting tool for installing ship rudder bushings. This lifting tool can improve the safety of rudder bushing lifting, reduce the labor intensity of workers, and at the same time ensure the quality of the entire rudder bushing lifting, shorten the construction cycle, and reduce costs and increase efficiency.

[0004] This utility model is achieved using the following technical solution:

[0005] A lifting fixture for installing a ship's rudder system bushing includes a pressure rod, on which a pair of connecting flanges are mounted, and at least two connecting holes are symmetrically opened on the sidewalls of the connecting flanges.

[0006] It also includes a connecting plate, a telescopic sleeve, an adjusting nut, and a telescopic rod. One end of the telescopic rod is fixedly connected to the connecting hole, and the other end extends into the telescopic sleeve. The telescopic sleeve is fixedly installed on the inner side wall of the connecting plate. The adjusting nut is installed on the telescopic rod, and a spring is sleeved on the telescopic rod and the telescopic sleeve between the adjusting nut and the connecting plate. By tightening or loosening the adjusting nut, the spring force can be adjusted, causing relative displacement between the telescopic rod and the telescopic sleeve, thereby realizing the adjustable distance between the pressure rod and the connecting plate.

[0007] Furthermore, the connecting plate is made of SUS316 stainless steel, with the lower end forming a support plate that contacts the lower end of the bushing to bear the weight of the rudder bushing.

[0008] Furthermore, the pressure-bearing rod is made of SUS316 stainless steel, and the upper part of the pressure-bearing rod is connected to the lifting ring through a threaded hole.

[0009] Furthermore, the bearing rod is provided with a boss, which is clearance-fitted with the connecting flange.

[0010] Furthermore, the number of connecting plates is consistent with the number of connecting holes opened on the side wall of the connecting flange.

[0011] Furthermore, the opening direction of the connecting flanges must be consistent during installation to ensure that the subsequent connecting plates are installed in the same direction.

[0012] Furthermore, a pressure plate is installed on the telescopic rod, and the pressure plate is located between the spring and the adjusting nut.

[0013] The beneficial technical effects of this utility model are as follows:

[0014] 1. This utility model has a simple structure and is easy to operate. The spring force can be adjusted by adjusting the adjusting nut to complete the installation and disassembly of the connecting plate and telescopic rod. The bushing can be hoisted by locking the lifting ring.

[0015] 2. This utility model has a low cost: the connecting plate, telescopic sleeve, pressure plate, adjusting nut, telescopic rod, pressure rod, locking nut, and connecting flange can all be made of stainless steel, requiring less material and no special materials.

[0016] 3. This utility model has strong applicability: it can be adapted to various specifications of rudder bushings by only changing the telescopic sleeve, spring and telescopic rod, and can be reused. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of the hoisting tool for installing the ship's rudder bushing provided in an embodiment of the present utility model;

[0018] Figure 2 A top view of the hoisting fixture for installing the ship's rudder bushing provided in this embodiment of the utility model;

[0019] Figure 3 This is a schematic diagram of the installation of the pressure bar, connecting flange, locking nut, and lifting ring provided in an embodiment of the present utility model;

[0020] Figure 4 A schematic diagram of the installation of the spring, pressure plate, adjusting nut, telescopic tube, and connecting flange provided for an embodiment of this utility model;

[0021] Figure 5 This is a schematic diagram of the installation of the connecting plate, telescopic sleeve, and telescopic rod provided for an embodiment of this utility model;

[0022] Figure 6 This is a schematic diagram of the installation of the connecting plate and rudder bushing provided in an embodiment of the present utility model;

[0023] Figure 7 A schematic diagram of the disassembly and hoisting fixture after the rudder bushing is hoisted, as provided in this embodiment of the utility model. Detailed Implementation

[0024] This utility model discloses a lifting fixture for installing a ship's rudder bushing, including a pressure rod 7, on which a pair of connecting flanges 9 are installed, and at least two connecting holes are symmetrically opened on the side wall of the connecting flanges 9.

[0025] It also includes a connecting plate 1, a telescopic sleeve 2, an adjusting nut 5, and a telescopic rod 6. One end of the telescopic rod 6 is fixedly connected to the connecting hole, and the other end extends into the telescopic sleeve 2. The telescopic sleeve 2 is fixedly installed on the inner side wall of the connecting plate 1. The adjusting nut 5 is installed on the telescopic rod 6, and a spring 3 is sleeved on the telescopic rod 6 and the telescopic sleeve 2 between the adjusting nut 5 and the connecting plate 1. By tightening or loosening the adjusting nut 5, the spring force can be adjusted, so that the relative displacement between the telescopic rod 6 and the telescopic sleeve 2 occurs, thereby realizing the adjustable distance between the pressure rod 7 and the connecting plate 1.

[0026] In this embodiment, as Figure 2 As shown, three threaded connection holes are symmetrically opened on the side wall of the connecting flange 9. The connection holes are threadedly connected to the telescopic rod 6. When installing the connecting flange 9, the opening direction of the connecting flange 9 must be consistent to ensure that the subsequent installation direction of the connecting plate 1 is consistent. Undoubtedly, the number of connecting plates 1 is consistent with the number of connection holes opened on the side wall of the connecting flange 9. Of course, in order to make the connecting plate 1 and the rudder bushing better fit, the outer wall of the connecting plate 1 can be considered to be an arc-shaped structure. Of course, the outer wall of the connecting plate can also be made into other shapes, as long as it can contact and fit with the inner wall of the rudder bushing.

[0027] like Figure 1 As shown, the pressure-bearing rod 7 is made of SUS316 stainless steel. The upper part of the pressure-bearing rod 7 is connected to the lifting ring 10 through a threaded hole. The pressure-bearing rod 7 is provided with a boss and threads at both ends. The boss is clearance-fitted with the connecting flange 9. The threads are used to fix the connecting flange 9 by locking the nut 8. The locking nut 8 has a hole on the outside for easy installation. The pressure-bearing rod 7 bears the weight and lateral support force of the entire device. It is the center and center of gravity of the device. After lifting, it can ensure that the rudder bushing is in a horizontal state, which facilitates the subsequent installation of the bushing.

[0028] A pressure plate 4 is installed on the telescopic rod 6, and the pressure plate 4 is located between the spring 3 and the adjusting nut 5. The telescopic rod 6 is made of SUS316 stainless steel, and one end is inserted into the telescopic sleeve 2. The telescopic rod bears the lateral support force of the hoisting device and also bears the vertical shear force.

[0029] The connecting plate 1 is made of SUS316 stainless steel. Its inner side is locked to the telescopic rod 2 through bolt holes, its outer side contacts the inner wall of the rudder bushing, and its lower end forms a support plate that contacts the lower end of the bushing to bear the weight of the rudder bushing.

[0030] It should be noted that the connecting plate, telescopic sleeve, pressure plate, adjusting nut, telescopic rod, bearing rod, locking nut, and connecting flange can all be made of SUS316 stainless steel, the spring can be made of OCr19Ni10, and the lifting ring is a finished part of 20# steel. The materials used are minimal and there are no special materials.

[0031] When using this tool, the specific steps are as follows:

[0032] Step 1, as follows Figure 3 As shown, first, fit the two connecting flanges 9 onto the pressure rod 7 respectively. Note that the opening directions of the two connecting flanges 9 must be consistent. Then, use two lock nuts 8 to lock them. Next, tighten the lifting ring 10 into the bolt hole at the upper end of the pressure rod 7.

[0033] Step two, as Figure 4 As shown, tighten the telescopic rod 6 onto the connecting flange 9, and then install the adjusting nut 5, pressure plate 4, and spring 3 in sequence. Note that the adjusting nut 5 should be loosened to the farthest point at this time to make room for the subsequent installation of the connecting plate 1.

[0034] Step 3, as Figure 5 As shown, tighten the telescopic sleeve 2 onto the connecting plate 1, and then put the telescopic sleeve 2 onto the telescopic rod 6 to complete the initial assembly of the rudder bushing hoisting fixture.

[0035] Step four, as Figure 6 As shown, place the entire rudder bushing hoisting fixture into the rudder bushing 11. During hoisting, be careful not to let the connecting plate 1 hit the inner wall of the rudder bushing 11. Make sure the support plate at the lower end of the connecting plate 1 is below the bushing, and then tighten the adjusting nut 5 so that the connecting plate 1 contacts the inner wall of the rudder bushing 11. Then tighten the adjusting nut 5 two more turns. Perform the above operation on all adjusting nuts 5 to ensure that the lateral support force of the connecting plate 1 on the inner wall of the rudder bushing 11 is consistent.

[0036] Step 5, as Figure 7 As shown, when removing the rudder bushing hoisting tool, first loosen the adjusting nut 5 to the farthest point, then detach the connecting plate 1, and then move the hoisting device away as a whole. When moving it away, be careful not to let the connecting plate 1 hit the inner wall of the rudder bushing 11.

[0037] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A lifting fixture for installing ship rudder system bushings, characterized in that, Includes a pressure-bearing rod (7), on which a pair of connecting flanges (9) are installed, and at least two connecting holes are symmetrically opened on the side wall of the connecting flanges (9); It also includes a connecting plate (1), a telescopic sleeve (2), an adjusting nut (5), and a telescopic rod (6). One end of the telescopic rod (6) is fixedly connected to the connecting hole, and the other end extends into the telescopic sleeve (2). The telescopic sleeve (2) is fixedly installed on the inner side wall of the connecting plate (1). The adjusting nut (5) is installed on the telescopic rod (6), and a spring (3) is sleeved on the telescopic rod (6) and the telescopic sleeve (2) between the adjusting nut (5) and the connecting plate (1). By tightening or loosening the adjusting nut (5), the spring force can be adjusted, so that the relative displacement occurs between the telescopic rod (6) and the telescopic sleeve (2), thereby realizing the adjustable distance between the pressure rod (7) and the connecting plate (1).

2. The hoisting fixture for installing ship rudder bushings according to claim 1, characterized in that: The connecting plate (1) is made of SUS316 stainless steel, with the lower end forming a support plate that contacts the lower end of the bushing and bears the weight of the rudder bushing.

3. The hoisting fixture for installing ship rudder bushings according to claim 1, characterized in that: The pressure-bearing rod (7) is made of SUS316 stainless steel, and the upper part of the pressure-bearing rod (7) is connected to the lifting ring (10) through a threaded hole.

4. The hoisting fixture for installing ship rudder bushings according to claim 1, characterized in that: The pressure-bearing rod (7) is provided with a boss, which is clearance-fitted with the connecting flange (9).

5. The hoisting fixture for installing ship rudder bushings according to claim 1, characterized in that: The number of connecting plates (1) is the same as the number of connecting holes opened on the side wall of the connecting flange (9).

6. The hoisting fixture for installing ship rudder bushings according to claim 1, characterized in that: During installation, the opening direction of the connecting flange (9) must be consistent to ensure that the subsequent connecting plate (1) is installed in the same direction.

7. The hoisting fixture for installing ship rudder bushings according to claim 1, characterized in that: A pressure plate (4) is installed on the telescopic rod (6), and the pressure plate (4) is located between the spring (3) and the adjusting nut (5).

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