Method for installing energy-saving guide wheel in ship manufacturing process

Abstract

A method for installing an energy-saving guide wheel in a ship manufacturing process relates to the technical field of ship manufacturing, and comprises the following steps: installing a stern shaft tube casting and the energy-saving guide wheel under a tire, placing an adjustable platform in place according to a ground sample line, cutting the allowance of the energy-saving guide wheel, placing the energy-saving guide wheel on the adjustable platform, and carrying out simple field cutting and repairing. Meanwhile, a groove of a cut and trimmed part is processed, then the energy-saving guide wheel is adjusted in place through a chain block, finally one-time accurate positioning is achieved, the situation that multiple times of cutting positioning occur when the energy-saving guide wheel and a stern shaft tube casting are installed is avoided, manpower and material resources are reduced, meanwhile, the matching time of a gantry crane is shortened, and the production efficiency is improved. And the cutting gap is reduced from the original 30 mm to the present 3-5 mm, so that the use amount of a large amount of welding materials is saved, the purposes of saving energy and reducing consumption are achieved, and the welding quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of shipbuilding, in particular to a method for installing an energy-saving guide wheel in a shipbuilding process. Background Art

[0002] Ship energy-saving guide wheel, also known as deflector, such as Figure 2 As shown, the energy-saving guide wheel is composed of a guide vane 2-1, a duct 2-2 and a reinforced structure thereof. The energy-saving guide wheel is installed on the stern tube casting 1 of the propeller. The energy-saving guide wheel can improve the uniformity of the propeller inflow, generate pre-swirling flow, and reduce the energy loss of the propeller wake.

[0003] In order to shorten the production cycle in the dock, the existing energy-saving guide wheel installation construction method adopts segmented manufacturing, that is, the stern tube casting 1 and the energy-saving guide wheel 2 are installed together on the ground, and then the final assembly is carried out in the dock. Since the guide vane 2-1 of the energy-saving guide wheel and the stern tube casting 1 have irregular margins, the guide vane and the margin of the reinforcing structure need to be cut on site during the installation process, and then welded and installed. Therefore, the energy-saving guide wheel can only be roughly placed in place first, and the crane is used to anchor the hook in real time, and the energy-saving guide wheel is leveled according to the positioning reference point and positioning data. At this time, a large amount of process support and tools are required. The construction personnel first draw the margin line according to the linear shape of the stern tube casting 1, and then perform secondary positioning after cutting. Since the linear shape here is extremely complex, this method needs to be repeated many times to accurately install the energy-saving guide wheel. It is also easy to have a gap tolerance phenomenon during the cutting process, which leads to plate replacement, or the gap tolerance problem can only be solved by increasing the welding amount, which affects the welding quality. This construction method can only be based on the experience of construction workers blindly cut to carry out multiple installation positioning, so it requires a very high skill level of construction workers, and wastes a lot of manpower. At the same time, the crane coordination time is too long, occupying the crane time.

[0004] Therefore, the industry is in urgent need of a method for installing energy-saving guide wheels in the shipbuilding process that can solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a method for installing an energy-saving guide wheel in a ship manufacturing process, which uses an adjustable platform to close the energy-saving guide wheel and the stern tube casting, and the installation is quick and accurate, saving labor and crane time.

[0006] To achieve the above object, the present invention adopts the following technical solution: A method for installing an energy-saving guide wheel in a ship manufacturing process comprises the following steps: Step 1, fixing a stern tube casting on a basic platform, requiring the axis of the stern tube casting to be perpendicular to the horizontal plane, making a ground sample cross line according to the axis, and marking it, and the cross center point of the ground sample cross line coincides with the axis; Step 2, arranging three adjustable platforms according to the ground sample cross line to support the energy-saving guide wheel, and the supporting positions are respectively the two ends and the center of the energy-saving guide wheel; Step 3, leveling the energy-saving guide wheel according to the guide tube positioning reference points a, e, and d, and at the same time using a level, a theodolite, and a total station to mark the solid material line of the part to be cut on the guide vane and cut the remaining material; Step 4, hoisting the energy-saving guide wheel after the remaining material is cut onto the adjustable platform, and sealing it; Step 5, opening the guide vane groove, grinding it, adjusting the energy-saving guide wheel into place using a hand winch or a lead screw, and then welding it.

[0007] The above-mentioned method for installing an energy-saving guide wheel in the ship manufacturing process, the adjustable platform includes a fixed platform, an adjustable platform base device, an adjustable platform device, and a heavy-duty pulley device. The fixed platform includes a platform bottom plate, a platform side plate, a platform top plate, and a platform track. The platform bottom plate, the platform side plate, and the platform top plate form a frame structure, and the platform track is installed on the platform top plate. The adjustable platform base device includes a platform bottom plate, a fixed nut, a bottom plate reinforcement toggle plate, a mandrel adjustment nut, a spiral mandrel, and an adjustment through hole. The fixed nut is arranged under the platform top plate, the bottom plate reinforcement toggle plate is divided into four pieces, which are cross-welded on the outside of the mandrel adjustment nut and the top of the platform bottom plate, the mandrel adjustment nut has a thread inside, and is used in conjunction with the external thread of the spiral mandrel to play a lifting role, and the spiral mandrel is T-shaped The top of the heavy-duty pulley device comprises a pulley bracket, an H-type pulley, a gasket, a lock nut and a half-thread bolt. The H-type pulley is arranged on the pulley bracket, the gasket is arranged on the inner side of the pulley bracket, the lock nut has a nylon ring inside to prevent the nut from loosening, and the half-thread bolt plays a role of connecting and fixing.

[0008] In the above-mentioned method for installing the energy-saving guide wheel in the ship manufacturing process, the upper surface of the top plate and the contact surface of the energy-saving guide wheel duct are adjusted to be in the same horizontal plane.

[0009] In the above-mentioned method for installing the energy-saving guide wheel in the ship manufacturing process, the platform bottom plate and the pulley bracket are welded and fixed, four pulley brackets are welded on each platform bottom plate, and the heavy pulley device moves left and right along the platform track.

[0010] In the above-mentioned method for installing the energy-saving guide wheel in the ship manufacturing process, the fixing nut is arranged below the platform top plate to play a safety role.

[0011] The present invention has the following advantages: The energy-saving guide wheel no-residue installation method in the ship manufacturing process of the present invention is to install the stern tube casting and the energy-saving guide wheel under the tire, put the adjustable platform in place according to the ground sample line, cut the energy-saving guide wheel margin, place it on the adjustable platform, perform simple on-site cutting and repairing, and handle the groove of the cutting and repairing part, and then use a hand winch to adjust the energy-saving guide wheel in place, and finally achieve one-time accurate positioning, avoiding the situation of multiple cutting and positioning when installing the energy-saving guide wheel and the stern tube casting, reducing the manpower and material resources, and reducing the coordination time of the gantry crane. The cutting gap is reduced from the original 30mm to the current 3-5mm, saving a lot of welding materials, achieving the purpose of energy saving and consumption reduction, and improving the welding quality. In order to ensure that the adjustment platform can move smoothly on the fixed platform, 4 heavy-duty pulley devices are set under the bottom plate of the adjustment platform, which can slide along the track on the fixed platform. At the same time, in order to ensure safety, the lower part of the adjustment platform is provided with a fixing nut, and the fixing nut is provided with a rotating through hole, and the adjustment platform can be connected and fixed to the fixed platform by rotating the fixing nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the horizontal installation of the energy-saving guide wheel; Figure 2 It is the axonometric drawing of the installation structure of the energy-saving guide wheel and the stern tube casting; Figure 3 It is the A-direction view; Figure 4 It is a structural schematic diagram of a fixed platform supporting an energy-saving guide wheel; Figure 5 is a front view of the adjustment platform base device; Figure 6 It is a right side view of the adjustment platform base device; Figure 7 is a schematic diagram of an adjustment platform device; Figure 8 It is a schematic diagram of the structure of a heavy pulley device; The reference numerals in the figure represent: 1, stern tube casting; 2, energy-saving guide wheel; 2-1, guide vane; 2-2, guide tube; a, e, d, guide tube positioning reference point; 3, fixed platform, 3-1. Platform bottom plate; 3-2. Platform side plate; 3-3. Platform top plate; 3-4. Platform track; 4. Adjustment platform base device; 4-1. Platform bottom plate; 4-2. Fixing nut; 4-3. Bottom plate reinforcement toggle plate; 4-4. Push rod adjustment nut; 4-5. Spiral push rod; 4-6. Adjustment through hole; 5. Adjustment platform device; 5-1. Adjustment top plate; 5-2. Push rod fixing sleeve; 5-3. Adjustment top plate reinforcement toggle plate; 5-4. Push rod guard plate; 5-5. Fixing bolt; 6. Heavy-duty pulley device; 6-1. Pulley bracket; 6-2. H-type pulley; 6-3. Gasket; 6-4. Anti-loosening nut; 6-5. Half-thread bolt; 7. Foundation platform; 8. Ground sample cross line. DETAILED DESCRIPTION

[0013] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0014] The present invention provides a method for installing an energy-saving guide wheel in a shipbuilding process, such as Figure 1 , Figure 3 As shown, when installing the energy-saving guide wheel 2, first place the stern tube casting 1 on the basic platform 7, then level it, and do a good job of supporting and sealing. The axis of the stern tube casting 1 is required to be perpendicular to the horizontal plane. It is important to ensure the verticality of the axis. Make a ground sample cross line 8 based on the axis and mark it. Make a horizontal loop on the stern tube casting 1 based on the energy-saving guide wheel positioning data. Arrange three adjustable platforms reasonably based on the ground sample line, which are located at the bottom and left and right sides of the energy-saving guide wheel respectively. The energy-saving guide wheel 2 is leveled according to the reference positioning points a, e, and d, and a horizontal line is made on each guide vane. This horizontal line needs to match the horizontal loop line on the stern tube casting 1. The total station is used to collect three-dimensional data of the horizontal line on each guide vane of the energy-saving guide wheel and the horizontal loop line on the stern tube casting 1. At the same time, the three reference points on the energy-saving guide wheel duct and the axis data on the stern tube casting 1 are collected, and the coordinate points are generated in the BLOCK software. The horizontal line on each guide vane of the energy-saving guide wheel and each section on the stern tube casting 1 are drawn. At this time, the horizontal line of the guide wheel and the section on the casting will form an intersection. Points, if there is a deviation, the intersection can be captured in the software, and the value can be measured to obtain the actual data. According to this data, the excess margin on the energy-saving guide wheel guide vane can be cut off, and then the energy-saving guide wheel 2 is hoisted to the adjustable platform, and the three reference points are calibrated. After passing the test, the duct is sealed with the adjusting top plate 5-1 respectively. The sealing form can be in the form of a card plate. After simple on-site research and finishing, the energy-saving guide wheel is adjusted into place using a hand winch or a screw, and the accuracy is finally confirmed. If the height direction of the three reference points changes, the height of the energy-saving guide wheel can be adjusted by rotating the adjusting through hole 4-6.

[0015] The present invention closes the energy-saving guide wheel under the tire with the ship stern tube casting through an adjustable platform, so that the energy-saving guide wheel can meet the positioning accuracy requirement, and finally realizes the one-time accurate positioning of the energy-saving guide wheel, avoids taking up too much gantry crane time during the installation of the energy-saving guide wheel, and improves the safety factor of construction personnel by reducing the construction height.

[0016] The present invention provides a method for installing an energy-saving guide wheel in a ship manufacturing process, wherein the adjustable platform comprises a fixed platform 3, an adjustable platform base device 4, an adjustable platform device 5, and a heavy-duty pulley device 6. The fixed platform 3 is welded by a platform bottom plate 3-1, a platform side plate 3-2, and a platform top plate 3-3, and a platform track 3-4 is installed on the platform top plate 3-3.

[0017] The adjusting platform base device 4 includes a platform bottom plate 4-1, a fixing nut 4-2, a bottom plate reinforcing toggle plate 4-3, a push rod adjusting nut 4-4, a spiral push rod 4-5, and an adjusting through hole 4-6. The fixing nut 4-2 is arranged under the platform top plate 3-3. The bottom plate reinforcing toggle plate 4-3 is divided into four pieces, which are welded in a cross shape on the outside of the push rod adjusting nut 4-4 and the top of the platform bottom plate 4-1. The push rod adjusting nut 4-4 has a thread inside, which is used in conjunction with the external thread of the spiral push rod 4-5 to achieve a lifting and lowering effect. The spiral push rod 4-5 is T-shaped, and the top is cylindrical, and an adjusting through hole 4-6 is arranged in the upper part. The spiral push rod 4-5 can be rotated and adjusted through the adjusting through hole to achieve the purpose of lifting and lowering.

[0018] The adjusting platform device 5 comprises an adjusting top plate 5-1, a top rod fixing sleeve 5-2, an adjusting top plate reinforcing toggle plate 5-3, a top rod guard plate 5-4 and fixing bolts 5-5. The adjusting top plate 5-1 is welded to the top rod fixing sleeve 5-2. The adjusting top plate reinforcing toggle plate 5-3 is respectively welded to the adjusting top plate 5-1 and the top rod fixing sleeve 5-2. The top rod guard plate 5-4 is in a circular shape, divided into two pieces, and provided with 12 through holes, and is fixed to the lower end surface of the top rod fixing sleeve 5-2 by fixing bolts 5-5.

[0019] The heavy-duty pulley device 6 includes a pulley bracket 6-1, an H-type pulley 6-2, a gasket 6-3, a lock nut 6-4, and a half-thread bolt 6-5. The H-type pulley 6-2 is arranged on the pulley bracket 6-1, the gasket 6-3 is arranged on the inner side of the pulley bracket, the lock nut 6-4 has a nylon ring inside to prevent the nut from loosening, and the half-thread bolt 6-5 serves to connect and fix.

[0020] The heavy pulley device 6 moves along the platform track 3-4, driving the energy-saving guide wheel 2 to slowly approach 1, and after reaching the predetermined accurate position, the welding operation is carried out.

Claims

1. A method for installing an energy-saving guide wheel in a shipbuilding process, characterized in that: The method for installing an energy-saving guide wheel in the shipbuilding process comprises the following steps: Step 1: fix the stern tube casting (1) on the base platform (7), requiring the axis of the stern tube casting (1) to be perpendicular to the horizontal plane, make a ground sample cross line (8) according to the axis, and mark it, so that the cross center point of the ground sample cross line (8) coincides with the axis; Step 2: arrange three adjustable platforms according to the ground sample cross line (8) for supporting the energy-saving guide wheel (2), and the supporting positions are respectively the two ends and the center of the energy-saving guide wheel; Step 3: level the energy-saving guide wheel (2) according to the guide tube positioning reference points (a), (e), and (d), and at the same time use a level, a theodolite, and a total station to mark the solid material line of the part to be cut on the guide vane (2-2) and cut the remaining material; Step 4: hoist the energy-saving guide wheel (2) after the remaining material is cut onto the adjustable platform and seal it; Step 5: open the groove of the guide vane (2-2), grind it, adjust the energy-saving guide wheel (2) into place using a hand winch or a lead screw, and then weld it.

2. The method for installing an energy-saving guide wheel in a shipbuilding process according to claim 1, characterized in that: The adjustable platform comprises a fixed platform (3), an adjustable platform base device (4), an adjustable platform device (5), and a heavy pulley device (6); the fixed platform (3) comprises a platform bottom plate (3-1), a platform side plate (3-2), a platform top plate (3-3), and a platform track (3-4); the platform bottom plate (3-1), the platform side plate (3-2), and the platform top plate (3-3) form a frame structure; the platform track (3-4) is installed on the platform top plate (3-3); the adjustable platform base device (4) comprises a platform bottom plate (4-1), a fixing nut (4-2), bottom plate reinforcing toggle plate (4-3), push rod adjusting nut (4-4), spiral push rod (4-5), adjusting through hole (4-6), the fixing nut (4-2) is arranged under the platform top plate (3-3), the bottom plate reinforcing toggle plate (4-3) is divided into four parts, which are welded in a cross shape on the outside of the push rod adjusting nut (4-4) and the top of the platform bottom plate (4-1), the push rod adjusting nut (4-4) has a thread inside, which is used in conjunction with the external thread of the spiral push rod (4-5) to play a lifting role, the spiral push rod (4-5) is T-shaped, and the top is cylindrical, An adjustment through hole (4-6) is provided at the upper portion, and the adjustment screw push rod can be rotated through the adjustment through hole. The adjustment platform device (5) comprises an adjustment top plate (5-1), a push rod fixing sleeve (5-2), an adjustment top plate reinforcing toggle plate (5-3), a push rod guard plate (5-4), and a fixing bolt (5-5). The adjustment top plate (5-1) is welded to the push rod fixing sleeve (5-2), the adjustment top plate reinforcing toggle plate (5-3) is respectively welded to the adjustment top plate (5-1) and the push rod fixing sleeve (5-2), and the push rod guard plate (5-4) is in a circular shape and is divided into two parts. , and 12 through holes are provided, and fixed to the lower end surface of the top rod fixing sleeve (5-2) through fixing bolts (5-5), the heavy pulley device (6) comprises a pulley bracket (6-1), an H-type pulley (6-2), a gasket (6-3), a locking nut (6-4), and a half-thread bolt (6-5), the H-type pulley (6-2) is arranged on the pulley bracket (6-1), the gasket (6-3) is arranged on the inner side of the pulley bracket, the locking nut (6-4) has a nylon ring inside to prevent the nut from loosening, and the half-thread bolt (6-5) plays a role of connecting and fixing.

3. The method for installing an energy-saving guide wheel in a shipbuilding process according to claim 2, characterized in that: The upper surface of the top plate (5-1) is adjusted so that the contact surface of the energy-saving guide wheel guide tube (2-2) is in the same horizontal plane.

4. The method for installing an energy-saving guide wheel in a shipbuilding process according to claim 2, characterized in that: The platform bottom plate (4-1) and the pulley bracket (6-1) are welded and fixed, four pulley brackets are welded on each platform bottom plate, and the heavy pulley device (6) moves left and right along the platform track (3-4).

5. A method for installing an energy-saving guide wheel in a shipbuilding process according to claim 2, characterized in that: The fixing nut (4-2) is arranged below the platform top plate (3-3) to prevent slipping.

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