A method for installing steel structure bulkheads

Abstract

This invention relates to a method for installing a steel structure bulkhead. The method includes: Step 1, marking the theoretical installation line and plate thickness line of the steel structure bulkhead on the deck; Step 2, installing several T-shaped elbow plates along the theoretical installation line and plate thickness line on the deck, with the T-shaped elbow plates installed outside the theoretical installation line and plate thickness line; each T-shaped elbow plate includes a face plate and a web plate; the projection distance of the face plate perpendicular to the deck direction at the side edge is 1-2 mm from the theoretical installation line and plate thickness line; Step 3, inserting the steel structure bulkhead between the T-shaped elbow plates outside the theoretical installation line and plate thickness line, with the steel structure bulkhead falling onto the deck along the face plate of the T-shaped elbow plates; Step 4, completely welding and fixing the lower end of the steel structure bulkhead to the deck. This invention uses T-shaped elbow plates to achieve positioning and limiting functions during the installation of the steel structure bulkhead, preventing tipping during installation and tack welding, and ensuring construction safety.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding, and more specifically to a method for installing steel structure bulkheads. Background Technology

[0002] Some ship compartments use 3-4mm thick steel plates as bulkheads to reduce the weight of the hull. Because these bulkheads are thin, it is difficult to control their verticality during installation, and they are prone to tipping over and welding deformation during the welding process.

[0003] For installations on thinner bulkheads, current practices involve horizontal reinforcement at the top and bottom of the bulkhead, as well as diagonal bracing using channel steel or steel pipes. Horizontal reinforcement only ensures horizontal flatness; due to the thinness of the bulkhead, the upper and lower horizontal reinforcements may not be in the same forward or backward position, making it impossible to guarantee verticality. Diagonal bracing can be considered "point" reinforcement, only ensuring verticality within a small area around the support point. Furthermore, diagonal bracing needs to be welded to the bulkhead, and the installation and removal of diagonal bracing may damage the bulkhead. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a method for installing steel structure bulkheads, which uses T-shaped elbow plates to position and limit the installation of the steel structure bulkheads, ensuring the verticality of the installation and preventing welding deformation.

[0005] The technical objective of this invention is achieved through the following technical solution:

[0006] A method for installing a steel structure bulkhead, the method comprising:

[0007] Step 1: Mark the theoretical installation line and plate thickness line of the steel structure bulkhead on the deck. The theoretical installation line and plate thickness line correspond to the two sides of the thickness of the steel structure bulkhead.

[0008] Step 2: Install several T-shaped elbow plates on the deck along the installation theoretical line and the plate thickness line respectively. The T-shaped elbow plates are installed outside the installation theoretical line and the plate thickness line. The T-shaped elbow plate includes a face plate and a web plate. The web plate has a bottom edge and a side edge that are perpendicular to each other. The bottom edge is set parallel to the deck and the side edge is set perpendicular to the deck. The side edge of the web plate is fixed vertically to the middle of the face plate. The face plate extends upward along the side edge near the bottom edge. The projection distance of the face plate perpendicular to the deck direction at the side edge is 1-2mm from the installation theoretical line and the plate thickness line.

[0009] Step 3: Insert the steel structure bulkhead between the T-shaped elbow plates outside the installation theoretical line and outside the plate thickness line, and let the steel structure bulkhead fall onto the deck along the panel of the T-shaped elbow plate.

[0010] Step 4: Completely weld and fix the lower end of the steel structure bulkhead to the deck.

[0011] Furthermore, the method also includes installing an outer plate before the steel structure bulkhead is fully welded and fixed to the deck. Several bulb flats are installed on the inner side of the outer plate. The steel structure bulkhead has R-holes corresponding to the bulb flats on the outer plate. The left and right ends of the steel structure bulkhead extend and intersect the outer plate perpendicularly. When installing the outer plate, the theoretical installation line of the steel structure bulkhead is marked on the outer plate. After spot welding and fixing the steel structure bulkhead to the deck, the bulb flats on the outer plate pass through the R-holes. After aligning the outer plate with the steel structure bulkhead according to the theoretical installation line on the outer plate, the outer plate is installed and positioned. After adjusting the perpendicularity between the outer plate and the steel structure bulkhead, the outer plate is spot welded and fixed.

[0012] Furthermore, at the location where the steel structure bulkhead extends to the outer plate, T-shaped elbow plates are installed on the outer plate along the theoretical installation line on the outer plate, with the panels of the T-shaped elbow plates on the outer plate abutting against the steel structure bulkhead.

[0013] Furthermore, an inclined guide slope is provided at the upper end of the side of the web plate, and the panel extends upward along the side to cover the inclined guide slope.

[0014] Furthermore, when welding the steel structure bulkhead to the deck, welding is performed from the middle to both ends.

[0015] Furthermore, the web has weld holes at the position where the bottom edge and the side edge intersect perpendicularly, and the panel extends along the side edge to the weld hole area but does not extend to the bottom edge.

[0016] Furthermore, the T-shaped elbow plates on both sides of the steel structure bulkhead are symmetrically distributed.

[0017] Furthermore, after the welding between the steel structure bulkhead and the deck is completed, the verticality between the steel structure bulkhead and the deck and the flatness of the steel structure bulkhead are inspected, and stress is released by fire straightening.

[0018] Furthermore, after the steel structure bulkhead section is completed, the T-shaped elbow plate is removed. When removing the T-shaped elbow plate, a 10-15mm root is left, and the root is polished smooth.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. This invention uses T-shaped elbow plates to insert the steel structure bulkhead between the T-shaped elbow plates during installation to achieve positioning; the T-shaped elbow plates also limit the movement of the steel structure bulkhead, preventing it from tipping over during installation and positioning welding, thus ensuring construction safety.

[0021] 2. The present invention supports the steel structure bulkhead through the panel of the T-shaped elbow plate, which can play a role in preventing deformation and strengthening during the welding process between the steel structure bulkhead and the deck, and prevent the bulkhead from tilting and deforming during the welding process.

[0022] 3. The panel and the steel structure bulkhead only make contact but are not welded, which increases the contact area between the T-shaped elbow plate and the steel structure bulkhead, avoids excessive stress concentration on the surface of the steel structure bulkhead, and also avoids damage to the steel structure bulkhead caused by welding or dismantling of the T-shaped elbow plate.

[0023] 4. In this invention, the outer plate is installed after the steel structure bulkhead is positioned, ensuring that the bulb flat steel on the outer plate can pass smoothly through the steel structure bulkhead, which facilitates the installation of the outer plate. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the T-shaped elbow plate installed on the deck in this invention.

[0025] Figure 2 This is a top view schematic diagram of the T-shaped elbow plate installed on the deck in this invention.

[0026] Figure 3 This is a schematic diagram of the T-shaped elbow plate in this invention.

[0027] Figure 4 This is a schematic diagram of the steel structure bulkhead inserted between the T-shaped elbow plates in this invention.

[0028] Figure 5 This is a schematic diagram of the outer panel installation in this invention.

[0029] Figure 6 This is a schematic diagram of the T-shaped elbow plate root retention in this invention.

[0030] Figure 7 This is a schematic diagram illustrating the dimensions of the T-shaped elbow plate in this invention.

[0031] Figure 8 This is a schematic diagram of the spherical flat steel arrangement on the outer plate in this invention.

[0032] In the picture:

[0033] 1. Panel; 2. Web; 3. Side; 4. Bottom; 5. Weld hole; 6. Inclined guide surface; 7. Deck; 8. Theoretical installation line; 9. Plate thickness line; 10. Steel structure bulkhead; 11. T-shaped elbow plate; 12. Outer plate; 13. Bulb flat steel; 14. R-hole. Detailed Implementation

[0034] The technical solution of the present invention will be further described below with reference to specific embodiments:

[0035] A method for installing a steel structure bulkhead, the method comprising:

[0036] Step 1, as follows Figure 1As shown, the theoretical installation line 8 and plate thickness line 9 of the steel structure bulkhead are drawn on the deck 7. The theoretical installation line 8 and plate thickness line 9 are drawn with a steel needle or a scribing pen, and the line width is less than 1mm. The theoretical installation line 8 and plate thickness line 9 correspond to the two sides of the thickness of the steel structure bulkhead, respectively.

[0037] Step 2: Install several T-shaped elbow plates on deck 7 along the installation theoretical line 8 and plate thickness line 9, respectively. The T-shaped elbow plates are installed on the outside of the installation theoretical line 8 and plate thickness line 9. The steel structure bulkhead is assembled and welded on the jig. Several longitudinal ribs are set on the side of the steel structure bulkhead. The longitudinal ribs are set vertically. The T-shaped elbow plates are arranged every other longitudinal rib. When installing the T-shaped elbow plates, the verticality deviation within 1000mm is required to be controlled within 1mm, measured with a spirit level.

[0038] Preferably, the T-shaped elbow plates on both sides of the steel structure bulkhead 10 are symmetrically distributed.

[0039] T-shaped elbow plate, such as Figure 3 As shown, the T-shaped elbow plate includes a face plate 1 and a web plate 2; the web plate 2 has a bottom edge 4 and a side edge 3 that are perpendicular to each other. The bottom edge 4 is parallel to the deck 7, and the side edge 3 is perpendicular to the deck 7. The side edge of the web plate 2 is vertically fixed to the middle of the face plate 1, and the face plate 1 extends upward along the side edge near the bottom edge 4. Preferably, the projection distance of the face plate 1 at the side edge 3 perpendicular to the deck direction is 1mm-2mm from the installation theoretical line 8 and the plate thickness line 9, which facilitates the later insertion of the steel structure bulkhead. Figure 2 As shown.

[0040] Preferably, an inclined guide slope 6 is provided at the upper end of the side 3 of the web 2, and the panel 1 extends upward along the side 3 to cover the inclined guide slope 6. The inclined guide slope forms a guide flare, which facilitates the steel structure bulkhead to fall between the T-shaped elbow plates on both sides.

[0041] Preferably, the web plate 2 has a weld hole 5 at the position where the bottom edge 4 and the side edge 3 intersect perpendicularly. The panel 1 extends along the side edge 3 to the weld hole area but does not extend to the bottom edge 4. The weld hole facilitates the subsequent welding between the steel structure bulkhead and the deck.

[0042] More specifically, such as Figure 7 As shown, the thickness of the web 2 is not less than 8mm and generally does not exceed 25mm. The length of the bottom edge 4 is 400mm. The vertical distance between the position of the side edge 3 adjacent to the inclined guide slope 6 and the bottom edge 4 is 1000mm. The thickness of the panel 1 is not less than 10mm and the width is not less than 120mm. The width of the panel 1 is perpendicular to the direction of the web 2.

[0043] Step 3: Insert the steel structure bulkhead between the T-shaped elbow plates outside the installation theoretical line and the plate thickness line, as follows: Figure 4As shown, the steel structure bulkhead 10 is lowered onto the deck 7 along the panel 1 of the T-shaped elbow plate; before welding, the steel structure bulkhead 10 and the deck 7 are spot welded together, and the spot welding is carried out from the middle to both sides.

[0044] The forward and backward directions of the steel structure bulkhead are determined by the theoretical reference line and thickness line on the deck. The left and right directions of the steel structure bulkhead are confirmed by the centerline of the steel structure bulkhead and the centerline of the deck, or by the left and right ends of the steel structure bulkhead and the centerline of the deck. The centerline of the deck is set in a direction perpendicular to the steel structure bulkhead.

[0045] Before the steel structure bulkhead 10 is fully welded and fixed to the deck 7, the outer plate 12 is installed. Several bulb flats are installed on the inner side of the outer plate. The steel structure bulkhead 10 has R-holes corresponding to the bulb flats on the outer plate. These R-holes are opened after the steel structure bulkhead panels are assembled. The left and right ends of the steel structure bulkhead 10 extend perpendicularly to the outer plate 12. In this embodiment, the outer plate 12 is inclined relative to the deck 7. Figure 5 As shown, when installing the outer plate 12, theoretical installation lines for the steel structure bulkhead are marked on the outer plate 12. After spot welding the steel structure bulkhead 10 to the deck 7, the ball head of the ball flat steel of the outer plate is inserted into the R hole. After aligning the outer plate 12 with the steel structure bulkhead 10 according to the theoretical installation lines on the outer plate 12, the outer plate 12 is installed and positioned. After adjusting the perpendicularity between the outer plate 12 and the steel structure bulkhead 10, the outer plate 12 is spot welded and fixed. The outer plate 12 is spot welded and fixed to the deck, and the outer plate is also spot welded and fixed to the steel structure bulkhead. During spot welding, the welding is carried out upwards from the position where the outer plate and the deck intersect.

[0046] At the location where the steel structure bulkhead 10 extends to the outer plate 12, T-shaped elbow plates 11 are installed on the outer plate 12 along the theoretical installation line. The faceplate 1 of the T-shaped elbow plate 12 on the outer plate 12 is set against the steel structure bulkhead. Since the T-shaped elbow plate 12 is only set on one side of the steel structure bulkhead on the outer plate, the faceplate 1 can be directly set against the steel structure bulkhead. The T-shaped elbow plate 12 on the outer plate 12 can strengthen the welding of the steel structure bulkhead.

[0047] Step 4: Completely weld and fix the lower end of the steel structure bulkhead to the deck, and completely weld and fix the outer plate to the deck and the outer plate to the steel structure bulkhead. When welding, weld along the middle to both ends. Preferably, weld symmetrically on the front and rear sides of the steel structure bulkhead.

[0048] After the welding between the steel structure bulkhead 10 and the deck 7 is completed, the verticality between the steel structure bulkhead 10 and the deck 7 and the flatness of the steel structure bulkhead 10 are inspected, and fire straightening is performed to release stress.

[0049] After the steel structure bulkhead section is installed, remove the T-shaped elbow plate 7, leaving a 10-15mm stub when removing it, and then smooth the stub area. Figure 6 As shown, T-shaped elbow plate resection with root retention can avoid damage to the plate.

[0050] This embodiment is merely a further explanation of the present invention and is not intended to limit the present invention. Those skilled in the art can make non-inventive modifications to this embodiment as needed after reading this specification, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A method for installing a steel structure bulkhead, characterized in that, The method includes: Step 1: Mark the theoretical installation line and plate thickness line of the steel structure bulkhead on the deck. The theoretical installation line and plate thickness line correspond to the two sides of the thickness of the steel structure bulkhead. Step 2: Install several T-shaped elbow plates on the deck along the installation theoretical line and the plate thickness line respectively. The T-shaped elbow plates are installed outside the installation theoretical line and the plate thickness line. The T-shaped elbow plate includes a face plate and a web plate. The web plate has a bottom edge and a side edge that are perpendicular to each other. The bottom edge is parallel to the deck and the side edge is perpendicular to the deck. The side edge of the web plate is vertically fixed to the middle of the face plate. The face plate extends upward along the side edge near the bottom edge. The projection distance of the face plate perpendicular to the deck direction at the side edge is 1-2mm from the installation theoretical line and the plate thickness line. Step 3: Insert the steel structure bulkhead between the T-shaped elbow plates outside the installation theoretical line and outside the plate thickness line, and let the steel structure bulkhead fall onto the deck along the panel of the T-shaped elbow plate. Step 4: Completely weld and fix the lower end of the steel structure bulkhead to the deck; The method also includes installing an outer plate before the steel structure bulkhead is fully welded and fixed to the deck. Several bulb flat steel bars are installed on the inner side of the outer plate. The steel structure bulkhead has R-holes corresponding to the bulb flat steel bars on the outer plate. The left and right ends of the steel structure bulkhead extend and intersect the outer plate perpendicularly. When installing the outer plate, the theoretical installation line of the steel structure bulkhead is marked on the outer plate. After spot welding and fixing the steel structure bulkhead to the deck, the bulb flat steel bars on the outer plate pass through the R-holes. After aligning the outer plate with the steel structure bulkhead according to the theoretical installation line on the outer plate, the outer plate is installed and positioned. After adjusting the perpendicularity between the outer plate and the steel structure bulkhead, the outer plate is spot welded and fixed. At the location where the steel structure bulkhead extends to the outer plate, T-shaped elbow plates are installed on the outer plate along the theoretical installation line on the outer plate, and the panels of the T-shaped elbow plates on the outer plate are set to abut against the steel structure bulkhead. The web has a weld hole at the position where the bottom edge and the side edge intersect perpendicularly, and the panel extends downward along the side edge to the weld hole area but does not extend to the bottom edge.

2. The method for installing a steel structure bulkhead according to claim 1, characterized in that, An inclined guide slope is provided at the upper end of the side of the web plate, and the panel extends upward along the side to cover the inclined guide slope.

3. The method for installing a steel structure bulkhead according to claim 1, characterized in that, The welding between the steel structure bulkhead and the deck is performed from the middle to both ends.

4. The method for installing a steel structure bulkhead according to claim 1, characterized in that, The T-shaped elbow plates on both sides of the steel structure bulkhead are symmetrically distributed.

5. The method for installing a steel structure bulkhead according to claim 1, characterized in that, After the welding between the steel structure bulkhead and the deck is completed, the verticality between the steel structure bulkhead and the deck and the flatness of the steel structure bulkhead are inspected, and fire straightening is carried out to release stress.

6. The method for installing a steel structure bulkhead according to claim 5, characterized in that, After the steel structure bulkhead section is installed, remove the T-shaped elbow plate, leaving a 10-15mm stub when removing the T-shaped elbow plate, and grind the stub area smooth.

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