A method for connecting and installing a hull, a bow door, and a main hinge arm

Abstract

The present invention relates to the technical field of ship bow door installation, and specifically to a method for connecting and installing a hull, a bow door, and a main hinge arm. The method mainly adopts the hull design, wherein the bow door and the hull are designed as an integrated whole, the rear end of the main hinge arm is connected to the hull via a rear pin shaft, the front end of the main hinge arm is elastically deformed by applying pressure, the front end ear plate of the hinge of the main hinge arm is connected to the bow door ear plate via a dummy shaft, and after deformation, the front end ear plate of the hinge of the main hinge arm is welded and fixed to the bow door ear plate via a toggle plate; the bow door ear plate and the front end hinge ear plate of the main hinge arm are bored by a boring tool, the pin shaft is plugged after boring, and the toggle plate is removed to complete the connection of the main hinge arm. The method has the advantages of simple structure, high bow door installation precision, high work efficiency, low labor intensity, and the like.

Description

Technical Field

[0001] The invention relates to the technical field of ship bow door installation, in particular to a method for connecting and installing a hull, a bow door and a main hinge arm. Background Art

[0002] As we all know, the bow door and the main hinge arm of the bow door are manufactured separately. Most shipyards choose to have the main hinge arm provided by the roll-on / roll-off equipment manufacturer. In this way, the main hinge arm is received as a complete machined device, including the lugs on the hinge arm. The main hinge arm made in the shipyard is usually manufactured and machined according to the drawings provided by the roll-on / roll-off equipment manufacturer. Therefore, when installing it on board, the main hinge lugs on the bow door must match the lugs on the main hinge arm. There are three main installation methods:

[0003] 1. Fix one end of the main hinge arm connected to the hull structure, then locate the main hinge lug on the bow door through the center of the lug on the other end of the main hinge arm, then mark and bore the main hinge lug on the bow door;

[0004] 2. The main hinge lugs on the bow door are directly positioned and bored according to the design drawings;

[0005] 3. Connect the processed ear plate that is not installed on the bow door structure to the main hinge arm through the shaft, and then position it and weld it to the bow door structure.

[0006] However, the above scheme is difficult to find during installation, or welding may easily cause the center line of the ear plate to be non-vertical, the installation construction is difficult and the efficiency is low, and the installation accuracy requirement of the main hinge arm of the bow door is required to coincide with the center line of the ear plate axis on the main hinge arm. In this way, the main hinge ear plate on the bow door needs to be bored. Considering that the main hinge arm has to bear the overall weight of the bow door, in order to prevent the bow door from sinking after opening the door, a pre-tightening force equal to the weight of the bow door needs to be applied to the front end of the main hinge arm when installing the main hinge arm. In this way, the axis lines of the upper and lower ear plates at the front end of the main hinge arm are not vertical. When aligning the boring line of the main hinge on the bow door, the axis line of the boring rod needs to be positioned according to the axis lines of the upper and lower ear plates of the main hinge arm. Only in this way can the processed hole be guaranteed to be consistent with the axis line on the main hinge arm. Due to the internal space limitation of the bow door, ordinary machining machinery is difficult to install and adjust, which causes practical difficulties in the installation of the bow door. Summary of the Invention

[0007] The purpose of the present invention is to solve the above-mentioned deficiencies in the prior art and to provide a method for connecting and installing a hull, a bow door and a main hinge arm with a simple structure, high bow door installation precision, high work efficiency and low labor intensity.

[0008] The technical solution adopted by the present invention to solve its technical problem is:

[0009] A method for connecting and installing a hull, a bow door, and a main hinge arm, wherein the steps of the method are as follows:

[0010] (1) According to the hull design, the bow door and the hull are designed as one body. Two upper and lower hull ear plates are installed on the hull at the rear end of the main hinge arm inside the cabin, and two upper and lower bow door ear plates are installed on the bow door at the front end of the main hinge arm;

[0011] (2) The rear end ear plate of the hinge at the rear end of the main hinge arm is positioned with the upper and lower hull ear plates and hinged via the rear pin shaft. The hull between the upper and lower hull ear plates is connected to the main hinge arm via the hinge adjustment seat plate. The hinge adjustment seat plate adjusts and positions the rear end of the main hinge arm.

[0012] (3) A front false hole with a diameter smaller than that of the front pin connected to the front end of the main hinge arm is initially opened on the upper and lower bow door ear plates, and a false shaft with a diameter smaller than that of the front false hole is inserted into the front false hole. The front end ear plate of the hinge of the main hinge arm is connected to the upper and lower bow door ear plates through the front false shaft;

[0013] (4) A pressure equivalent to the weight of the bow door is applied to the front end of the main hinge arm, causing the main hinge arm to deform elastically;

[0014] (5) After deformation, the front end ear plate of the hinge of the main hinge arm is welded and fixed to the ear plate of the bow door through the bracket;

[0015] (6) Pull out the dummy shaft and use a boring tool to bore holes in the hinge front end lug and the upper and lower bow door lugs. Ensure that the axes are aligned during boring and that the axis of the holes is perpendicular to the horizontal line of the hull.

[0016] (7) Install the front pin into the hole bored in step (6), cut off the bracket, and finally remove the pressure applied to the front end of the main hinge arm. The installation of the bow door and the main hinge arm is completed.

[0017] (8) According to the hull design, the bow door is cut along the seam line of the bow door plate, and finally the bow door is cut off from the hull.

[0018] The boring tool used in step (6) and step (7) of the present invention includes a support frame, a lifting rod, a driver, a fixed seat, a universal joint, a boring bar, a cutter, an adjusting bearing, an adjusting tap, and a fixed base. The side of the support frame is connected to the fixed seat, a through hole is provided in the fixed seat, a lifting rod is provided in the through hole, the upper end of the lifting rod extends out of the fixed seat and is connected to the driver that drives the lifting rod to rotate and lift, the lower end of the lifting rod is connected to the boring bar via a universal joint, two adjusting bearings are provided on the boring bar, the adjusting bearings are in contact with the fixed base via an adjusting tap, the circumferential outer wall of the adjusting bearing is provided with at least three thread grooves, the rear end of the adjusting tap is inserted into the thread groove, the front end of the adjusting tap is straightened to the fixed base and contacts the inner wall of the fixed base, a boring cutter mounting hole is provided on the side of the fixed base, and the boring cutter is mounted on the boring bar in the fixed base.

[0019] The support frame described in the present invention is connected to the fixed seat through an adjustment component. The adjustment component includes a left clamp, a right clamp, a clamp connecting bolt, a left connecting plate, a right connecting plate, an adjusting bolt, a fixing bolt, and a fixing nut. The left clamp and the right clamp are respectively wrapped around the outside of the fixed seat, and the left clamp and the right clamp are locked and connected through the clamp connecting bolt. The side of the right clamp is fixedly connected to the left connecting plate, and the left connecting plate is connected to the right connecting plate through a fixing bolt and a fixing nut. An adjusting screw hole is provided on the left connecting plate, and an adjusting bolt is provided in the adjusting screw hole. After the adjusting bolt is connected to the adjusting screw hole, it contacts the plate surface of the right connecting plate, and the distance between the left connecting plate and the right connecting plate is adjusted by the adjusting bolt.

[0020] The lifter described in the present invention includes a driving motor, a driving gear, and a driven gear. The lifting rod is set as a lifting screw. The interior of the driven gear is an internal thread that matches the lifting screw. The output shaft of the driving motor is connected to the driving gear, and the driving gear is meshed with the driven gear. The driving motor drives the driving gear to rotate, and then drives the driven gear to rotate, ultimately realizing the rotation and lifting function of the lifting screw.

[0021] The universal joint described in the present invention is a detachable universal joint, which includes a connecting ring, a U-shaped ring, a disassembly bolt and a disassembly nut. The connecting ring is connected to the lifting rod, and the open upper ends of the U-shaped ring are respectively provided with disassembly holes. The upper end opening of the U-shaped ring is straightened on the connecting ring, and the disassembly bolt passes through the disassembly hole and the inner hole of the connecting ring and is connected to the disassembly nut.

[0022] The cross section of the support frame of the present invention is a right triangle, one right-angled side of the support frame is connected to the fixing seat, and the other right-angled side of the support frame is fixed to the hull, thereby increasing the structural stability.

[0023] The method of using the boring tool described in the present invention is as follows: first, weld and fix the support frame to the hull, and the side of the support frame is connected to the fixed seat through the adjustment component. The adjustment component preliminarily adjusts the position of the fixed seat, and then places the fixed base above the front end ear plate of the hinge or the rear end ear plate of the hinge and welds it, and then uses a laser or plumb line method to pass through the front false hole or the rear false hole, and then rotates the adjustment tap to make the axes of the upper and lower adjustment bearings coincide with the laser and the plumb line respectively, and then pass the boring rod through the upper adjustment bearing and the lower adjustment bearing, the boring rod is connected to the upper lifting rod via a universal joint, and then finally adjust the position of the fixed seat through the adjustment component so that the lifting rod coincides with the axis of the boring rod, and then install the boring tool on the boring bar from the side of the fixed base, start the driver to rotate while lowering the lifting rod downward, and then drive the boring tool to bore.

[0024] Due to the adoption of the above structure, the present invention has the advantages of simple structure, high bow door installation precision, high working efficiency, low labor intensity, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the installation structure of the present invention.

[0026] Figure 2 yes Figure 1 Top view of .

[0027] Figure 3 yes Figure 1 A partial enlarged view of part A in the middle.

[0028] Figure 4 yes Figure 3 Top view of the fixed base, adjusting bearing and adjusting tap.

[0029] Figure 5 yes Figure 3 Schematic diagram of the structure of the universal joint. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the accompanying drawings:

[0031] As shown in the accompanying drawings, a method for connecting and installing a hull, a bow door, and a main hinge arm is characterized in that the steps of the connection and installation method are as follows:

[0032] A method for connecting and installing a hull, a bow door, and a main hinge arm, wherein the steps of the method are as follows:

[0033] (1) According to the hull design, the bow door and the hull are designed as one body. Two upper and lower hull ear plates 2 are installed on the hull at the rear end of the main hinge arm 1 inside the cabin, and two upper and lower bow door ear plates 4 are installed on the bow door 3 at the front end of the main hinge arm 1;

[0034] (2) The rear end ear plate 5 of the hinge at the rear end of the main hinge arm 1 is positioned with the upper and lower hull ear plates 2 and hinged via the rear pin shaft. The hull between the upper and lower hull ear plates 2 is connected to the main hinge arm 1 via the hinge adjustment seat plate. The hinge adjustment seat plate adjusts and positions the rear end of the main hinge arm. The hinge adjustment seat plate includes a jack, a locking bolt and a tray. The tray is connected to the main hinge arm. The output shaft of the jack is connected to the tray. The jack is fixed to the hull. A support plate is provided on the hull. The support plate is arranged parallel to the tray. A locking screw hole is provided on the support plate. The locking screw hole contacts the tray after passing through the support plate. The final position of the tray is positioned by the locking screw to ensure the stability of the main hinge arm. The height adjustment of the rear end of the main hinge arm is achieved by the hinge adjustment seat plate. After the bow door sinks, it can be adjusted again by the hinge adjustment seat plate.

[0035] (3) A front false hole with a diameter smaller than the diameter of the front pin connected to the front end of the main hinge arm 1 is initially opened on the upper and lower bow door ear plates 4, and a false shaft with a diameter smaller than the front false hole is inserted into the front false hole. The front end ear plate 6 of the main hinge arm 1 is connected to the upper and lower bow door ear plates 4 through the front false shaft;

[0036] (4) A pressure equivalent to the gravity of the bow door 3 is applied to the front end of the main hinge arm 1, causing the main hinge arm 1 to deform elastically;

[0037] (5) After deformation, the front end ear plate 6 of the hinge of the main hinge arm 1 is welded and fixed to the bow door ear plate 4 through the toggle plate;

[0038] (6) Pull out the dummy shaft and use a boring tool to bore the hinge front end ear plate 6 and the upper and lower bow door ear plates 4. Ensure that the axes are consistent during boring and that the axis of the boring is perpendicular to the horizontal line of the hull;

[0039] (7) Install the front pin in the hole bored in step (6), cut off the bracket, and finally remove the pressure applied to the front end of the main hinge arm 1. The installation of the bow door 3 and the main hinge arm 1 is completed.

[0040] (8) According to the hull design, the bow door 3 is cut along the seam line of the bow door plate, and finally the bow door 3 is cut off from the hull.

[0041] Furthermore, the boring tool used in the step (6) includes a support frame 7, a lifting rod 8, a driver 9, a fixed seat 10, a universal joint 11, a boring bar 12, a grommet 13, an adjusting bearing 14, an adjusting tap 15, and a fixed base 16. The side of the support frame 7 is connected to the fixed seat 10, and a through hole is provided in the fixed seat 10. The lifting rod 8 is provided in the through hole. The upper end of the lifting rod 8 extends out of the fixed seat 10 and is connected to the driver 9 that drives the lifting rod 8 to rotate and lift. The lower end of the lifting rod 8 is connected to the boring bar 12 via the universal joint 11. The boring bar 12 is provided with two adjusting bearings 14. The adjusting bearing 14 is connected to the fixed base via the adjusting tap 15. The seat 16 is in contact connection. The outer wall of the adjusting bearing 14 in the circumferential direction is provided with at least three thread grooves. The rear end of the adjusting tap 15 is inserted into the thread groove. The front end of the adjusting tap 15 is straightened to the fixed base 16 and contacts the inner wall of the fixed base 16. A boring tool mounting hole 17 is provided on the side of the fixed base 16. The boring tool is installed on the boring rod 12 in the fixed base 16. The above-mentioned thread groove is provided on the outer sleeve of the adjusting bearing. The extending length of the adjusting tap is controlled by rotating the adjusting tap with a wrench, thereby driving the adjustment of the position of the adjusting bearing 14 so that the axis of the inner sleeve of the adjusting bearing 14 is in the same straight line with the axis of the laser or gravity hammer.

[0042] Furthermore, the support frame 7 is connected to the fixing seat 10 through an adjustment component, and the adjustment component includes a left clamp 18, a right clamp 19, a clamp connecting bolt 20, a left connecting plate 21, a right connecting plate 22, an adjusting bolt 23, a fixing bolt 24, and a fixing nut 25. The left clamp 18 and the right clamp 19 are respectively wrapped around the outside of the fixing seat 10, and the left clamp 18 and the right clamp 19 are locked and connected through the clamp connecting bolt 20. The side of the right clamp 19 is fixedly connected to the left connecting plate 21, and the left connecting plate 21 is connected to the right connecting plate 22 through the fixing bolt 24 and the fixing nut 25. An adjusting screw hole is provided on the left connecting plate 21, and an adjusting bolt 23 is provided in the adjusting screw hole. After the adjusting bolt 23 is connected to the adjusting screw hole, it contacts the plate surface of the right connecting plate 22, and the distance between the left connecting plate 21 and the right connecting plate 22 is adjusted by the adjusting bolt 23.

[0043] Furthermore, the lifter includes a driving motor, a driving gear, and a driven gear. The lifting rod 8 is set as a lifting screw. The interior of the driven gear is an internal thread that matches the lifting screw. The output shaft of the driving motor is connected to the driving gear, and the driving gear is engaged with the driven gear. The driving motor drives the driving gear to rotate, and then drives the driven gear to rotate, and finally realizes the rotation and lifting function of the lifting screw. The lifter is a structure that can realize the lifting and rotation functions. Its specific connection relationship is the existing technology. Therefore, the detailed structural relationship is not shown in the figure.

[0044] Furthermore, the universal joint 11 is a detachable universal joint 11, which includes a connecting ring 26, a U-shaped ring 27, a disassembly bolt 28, and a disassembly nut 29. The connecting ring 26 is connected to the lifting rod 8, and the upper ends of the openings of the U-shaped ring 27 are respectively provided with disassembly holes. The upper end opening of the U-shaped ring 27 extends straight on the connecting ring 26, and the disassembly bolt 28 passes through the disassembly holes and the inner hole of the connecting ring 26 and is connected to the disassembly nut 29.

[0045] Furthermore, the cross section of the support frame 7 is a right triangle, one right-angled side of the support frame 7 is connected to the fixing seat 10, and the other right-angled side of the support frame 7 is fixed to the hull, thereby increasing the structural stability.

[0046] Furthermore, the method of using the boring tool is as follows: first, the support frame 7 is welded and fixed to the hull, and the side of the support frame 7 is connected to the fixing seat 10 through the adjusting assembly. The adjusting assembly preliminarily adjusts the position of the fixing seat 10, and then the fixing base 16 is placed above the front end ear plate 6 of the hinge or the rear end ear plate 5 of the hinge and welded, and then the front false hole or the rear false hole is passed through by the laser or plumb line method, and then the adjusting tap 15 is rotated to make the axes of the upper and lower adjusting bearings 14 coincide with the laser and plumb line respectively, and then the boring rod 12 is passed through the upper adjusting bearing 14 and the lower adjusting bearing 14, and the boring rod 12 is connected to the upper lifting rod 8 through the universal joint 11, and then the position of the fixing seat 10 is finally adjusted through the adjusting assembly so that the axes of the lifting rod 8 and the boring rod 12 coincide, and then the boring tool is installed on the boring rod 12 from the side of the fixed base 16, and the driver 9 is started to rotate while the lifting rod 8 is lowered downward, thereby driving the boring tool to bore.

[0047] In the above-mentioned step (4), the front end of the main hinge arm 1 applies a pressure equivalent to the gravity of the bow door 3, and the pressure is applied at the front end of the main hinge arm 1 (such as Figure 2 and Figure 4 ), the pressure applied is the gravity of the bow door 3. According to the relationship between the force arm and the pressure, since the weight of the bow door 3 is very large, the pressure difference caused by the force arm between the force application point and the bow door 3 can be ignored. Therefore, the gravity applied at the front end of the main hinge arm 1 is the gravity of the bow door 3. Moreover, since the main hinge arm 1 will bend downward after receiving the pressure, the position of the bow door ear plate 4 on the bow door 3 is the position obtained by calculating the deformation angle of the main hinge arm 1 in the early stage. Therefore, after the deformation of the main hinge arm 1, the connection with the bow door ear plate 4 corresponds, and the connection between the main hinge arm 1 and the bow door 3 can be realized. The gap between the hinge front end ear plate 6 of the main hinge arm 1 and the bow door ear plate 4 can be supported and connected by a gasket.

[0048] The upper and lower parts of the hinge front end ear plate 6 and the hinge rear end ear plate 5 are respectively provided with slots for inserting the hull ear plate 2 and the bow door ear plate 4. The hull ear plate 2 and the bow door ear plate 4 are respectively inserted into the slots. The above-mentioned installation method is efficient and highly precise, and can ensure that the front end axis of the main hinge arm 1 is parallel to the rear end axis. After opening the door, the bow door 3 runs smoothly, without deformation, and without noise, which greatly improves work efficiency and reduces production costs. Moreover, the hull and the bow door are an integrated structure in the early stage, with low production cost and can be cut after later setting, which can meet the good coordination between the bow door and the opening of the hull. It has the advantages of simple structure, high installation precision of the bow door 3, high work efficiency, and low labor intensity.

Claims

1. A method for connecting and installing a hull, a bow door, and a main hinge arm, characterized in that The connection and installation steps are as follows: (1) According to the hull design, the bow door and the hull are designed as one body. Two upper and lower hull ear plates are installed on the hull at the rear end of the main hinge arm inside the cabin, and two upper and lower bow door ear plates are installed on the bow door at the front end of the main hinge arm; (2) The rear end ear plate of the hinge at the rear end of the main hinge arm is positioned with the upper and lower hull ear plates and hinged via the rear pin shaft. The hull between the upper and lower hull ear plates is connected to the main hinge arm via the hinge adjustment seat plate. The hinge adjustment seat plate adjusts and positions the rear end of the main hinge arm. (3) A front false hole with a diameter smaller than that of the front pin connected to the front end of the main hinge arm is initially opened on the upper and lower bow door ear plates, and a false shaft with a diameter smaller than that of the front false hole is inserted into the front false hole. The front end ear plate of the hinge of the main hinge arm is connected to the upper and lower bow door ear plates through the front false shaft; (4) A pressure equivalent to the weight of the bow door is applied to the front end of the main hinge arm, causing the main hinge arm to deform elastically; (5) After deformation, the front end ear plate of the hinge of the main hinge arm is welded and fixed to the ear plate of the bow door through the bracket; (6) Pull out the dummy shaft and use a boring tool to bore holes in the hinge front end ear plate and the upper and lower bow door ear plates. Ensure that the axes are consistent during boring and that the axis of the boring is perpendicular to the horizontal line of the hull. (7) Install the front pin into the hole bored in step (6), cut off the bracket, and finally remove the pressure applied to the front end of the main hinge arm. The installation of the bow door and the main hinge arm is completed. (8) According to the hull design, the bow door is cut along the seam line of the bow door plate, and finally the bow door is cut off from the hull. The boring tool used in the step (6) includes a support frame, a lifting rod, a driver, a fixed seat, a universal joint, a boring bar, a guillotine, an adjusting bearing, an adjusting tap, and a fixed base. The side of the support frame is connected to the fixed seat through an adjusting component. A through hole is provided in the fixed seat, and a lifting rod is provided in the through hole. The upper end of the lifting rod extends out of the fixed seat and is connected to the driver that drives the lifting rod to rotate and lift. The lower end of the lifting rod is connected to the boring bar through a universal joint. Two adjusting bearings are provided on the boring bar. The adjusting bearings are in contact with the fixed base through an adjusting tap. The outer wall of the adjusting bearing in the circumferential direction is provided with at least three thread grooves. The rear end of the adjusting tap is inserted into the fixing base. Inserted into the thread groove, the front end of the adjusting tap is straightened and fixed to contact the inner wall of the fixed base, a boring tool mounting hole is provided on the side of the fixed base, and the boring tool is installed on the boring rod in the fixed base, and the adjusting assembly includes a left clamp, a right clamp, a clamp connecting bolt, a left connecting plate, a right connecting plate, an adjusting bolt, a fixing bolt, and a fixing nut. The left clamp and the right clamp are respectively wrapped around the outside of the fixed seat, and the left clamp and the right clamp are locked and connected by the clamp connecting bolt. The side of the right clamp is fixedly connected to the left connecting plate, and the left connecting plate is connected to the right connecting plate by the fixing bolt and the fixing nut. The left connecting plate is provided with an adjusting screw hole, and the adjusting bolt is provided in the adjusting screw hole. After the adjusting bolt is connected to the adjusting screw hole, it contacts the plate surface of the right connecting plate.

2. A method for connecting and installing a hull, a bow door, and a main hinge arm according to claim 1, characterized in that The driver includes a driving motor, a driving gear, and a driven gear. The lifting rod is set as a lifting screw. The interior of the driven gear is an internal thread that matches the lifting screw. The output shaft of the driving motor is connected to the driving gear, and the driving gear is meshed with the driven gear.

3. A method for connecting and installing a hull, a bow door, and a main hinge arm according to claim 1, characterized in that The universal joint is a detachable universal joint, which includes a connecting ring, a U-shaped ring, a disassembly bolt and a disassembly nut. The connecting ring is connected to the lifting rod, and the open upper ends of the U-shaped ring are respectively provided with disassembly holes. The upper end opening of the U-shaped ring extends to the connecting ring, and the disassembly bolt passes through the disassembly hole and the inner hole of the connecting ring and is connected to the disassembly nut.

4. A method for connecting and installing a hull, a bow door, and a main hinge arm according to claim 1, characterized in that The cross section of the support frame is a right triangle, one right-angled side of the support frame is connected to the fixing seat, and the other right-angled side of the support frame is fixed on the hull.

5. The method for connecting and installing the hull, bow door and main hinge arm according to claim 1, characterized in that The method of using the boring tool is as follows: first, weld the support frame to the hull, connect the side of the support frame to the fixed seat through the adjustment component, preliminarily adjust the position of the fixed seat by the adjustment component, and then place the fixed base above the front end ear plate of the hinge or the rear end ear plate of the hinge and weld it, and then use the laser or plumb line method to pass through the front false hole or the rear false hole, and then rotate the adjustment tap to make the axes of the upper and lower adjustment bearings coincide with the laser or plumb line respectively, and then pass the boring bar through the upper adjustment bearing and the lower adjustment bearing, the boring bar is connected to the upper lifting rod through the universal joint, and then finally adjust the position of the fixed seat through the adjustment component so that the lifting rod coincides with the axis of the boring bar, and then install the boring tool on the boring bar from the side of the fixed base, start the drive to rotate while lowering the lifting rod downward, thereby driving the boring tool to bore.

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