Novel film type enclosure system top bridge plate adhesion method

Abstract

According to the novel thin film type enclosure system top bridge plate adhesion method, the bottom face is an arc face with the center protruding outwards and adheres to a rigid secondary screen wall, a top bridge plate adhesive coating mode is divided into a middle area and a boundary area according to the characteristics of adhesion stations, the middle area is fully laid, and the boundary area is laid in a strip mode; the coating direction of the strip-shaped top bridge plate adhesive is parallel to the short edge of the top bridge plate, the top bridge plate adhesive in the middle area is extruded from the arc-shaped top end to the two sides during installation, the adhesive preferentially fills a gap caused by a secondary layer insulation gap between the flexible secondary screen wall and the top bridge plate, and the adhesion effect of a middle key area is guaranteed. Meanwhile, the top bridge plate is rolled by the tiling machine in the direction of the adhesive strip, so that the top bridge plate can be quickly mounted in a specified layer difference range, the adhesive is uniformly laid, bubbles are quickly discharged, and the adhesion speed and the adhesion quality are improved. Random control is no longer relied on a glue head, the use amount of the adhesive in each area is accurately grasped, repeated debugging by operators is not needed, and materials and labor cost are saved.

Description

Technical Field

[0001] The invention belongs to the field of film type enclosure system design and construction, and in particular relates to a novel film type enclosure system top bridge plate bonding method. Background Art

[0002] The film-type cargo containment system developed by the French GTT company includes NO96 and Mark III. For the Mark III cargo containment system, insulating materials such as enhanced polyurethane foam are used as the thermal insulation material for liquid cargo to ensure that the natural gas in the cargo tank is maintained in a liquid state below -163°C, thereby preventing the liquefied natural gas from directly contacting the hull and causing low-temperature embrittlement.

[0003] The top bridge pad is part of the main insulation module, such as Figure 1 As shown, the flexible secondary screen is adhered to the secondary insulation between adjacent insulation boards by a flexible secondary screen adhesive and covers the gap formed by adjacent insulation boards. The top bridge board is adhered to the flexible secondary screens between the plane insulation boards and the corner insulation boards by a top bridge board adhesive, thereby achieving the integrity of the main layer insulation and providing an installation plane for the main screen. Under the flexible secondary screen covered by the top bridge board, there is a gap between the two insulation boards, which is filled with glass wool components, and the boundary area of ​​the plane insulation board is additionally filled with caulking foam components, but there is often a layer difference between the filled glass wool components, the caulking foam components and the flexible secondary screen, and the hardness of the glass wool components is also different from that of the insulation board. Therefore, there will be a gap between the flexible secondary screen between the secondary insulation boards and the bottom of the top bridge board.

[0004] In order to ensure that the top bridge plate adhesive on the top bridge plate can completely fill this gap, at present, the top bridge plate adhesive coating method is usually 3 stripes and 1 stripe. The number of stripes is achieved by changing the number of one-line glue head outlets of the adhesive glue supply machine. The one-line glue head is connected to the glue supply line, and the one-line glue head is symmetrical with respect to the glue supply line. Both coating methods must make the thickness of the middle adhesive greater than the thickness of the adhesive on both sides.

[0005] However, the adhesive zoning thickness control is only determined by the position of the glue head outlet. Since the middle outlet is close to the feed pipe, the glue outlet speed is greater than the glue outlet speed on both sides, and the glue thickness of each area cannot be accurately controlled. During bonding, there is often a lack of glue in the gap between the secondary insulation layers. In order to meet the bonding effect, it is necessary to increase the minimum glue supply of the glue supply machine or apply the top bridge board adhesive in advance in the gap of the area to be bonded. In addition, when bonding, the top bridge board is directly bonded to the area to be installed. The bubbles under the top bridge board are not easy to discharge, and hollowing often occurs, which affects the adhesion of the top bridge board and the safety and insulation effect of the cargo containment system during operation. Summary of the invention

[0006] In order to solve the above problems, the present invention provides a novel top bridge board bonding method of a membrane type enclosure system, which aims to improve the bonding quality of the top bridge board of the membrane type enclosure system and shorten the construction period of the top bridge board. The technical solution adopted is: A novel method for bonding top bridge plates of a film-type enclosure system is characterized in that the top bridge plates of the novel film-type enclosure system are rectangular parallelepipeds formed by bonding plywood, enhanced polyurethane foam and a rigid secondary screen wall in sequence; the upper surface of the enhanced polyurethane foam is a plane and is bonded to the plywood; the bottom surface is an arc surface convex outward from the center and is bonded to the rigid secondary screen wall.

[0007] The arc surface of the top bridge plate satisfies the ellipse formula:

[0008] Where W is the width of the top bridge plate.

[0009] The width W and length of the top bridge plate are adapted to the gap between the insulation modules of the two main insulation boards.

[0010] After the top bridge board is coated with the top bridge board adhesive and installed, the height difference between the top of the top bridge board and the main layer of the adjacent insulation board should be controlled between -0.5mm and +0.5mm, and the thickness of the top bridge board adhesive should not be less than the minimum coating thickness T 4min , where T 3 The recommended bonding thickness of the flexible secondary screen adhesive is the minimum bonding thickness T 3min = 0.2mm to the maximum adhesion thickness T 3max =1.2mm, T 4 The recommended thickness of the top bridge adhesive is the minimum coating thickness T 4min = 0.5mm to the maximum coating thickness T 4max =4mm, the maximum height of the top bridge plate is, H 1 =H+0.5-2×T 2 -2×T 3max -T 4min ; in, T 2 is the thickness of the flexible secondary shield wall.

[0011] T 3 is the thickness of the flexible secondary screen adhesive.

[0012] T 4 is the thickness of the top bridge plate adhesive.

[0013] H is the height of the main insulation layer of the flat insulation board.

[0014] H 1 It is the maximum height of the top bridge deck.

[0015] When applying the top bridge board adhesive, it is divided into the middle area and the boundary area. The top bridge board adhesive in the middle area is fully spread, and the top bridge board adhesive in the boundary area is parallel to multiple rows of top bridge board adhesive strips, and the direction of the strips is parallel to the short side of the top bridge board; Width of adhesive for top bridge plate in middle area W 1 =T 1 +2X 1 , T 1 is the gap value of the secondary insulation board, X 1 =25mm to 27mm, X 1 The width of adhesive coating on the top bridge board that exceeds the insulation gap of the secondary layer on one side; Width of adhesive strip W for top bridge plate in border area 2 =X 6 +2X 2 -W 1 -2X 5 , X 2 = 10mm to 15mm; the maximum distance between any two top bridge adhesives X 5 ≤10mm, X 6 is the width of the flexible secondary screen, X 2 It is the adhesive coating width of the top bridge plate that exceeds the width of the flexible secondary shield wall on one side.

[0016] In order to ensure the minimum thickness requirement of the top bridge board adhesive in the middle area of ​​the top bridge board, multiple rectangular pads made of pearl cotton need to be installed in the gap between the two sides of the top bridge board adhesive coating area in the middle area and the boundary coating area. In addition, to ensure the installation flatness of the top bridge board, multiple pearl cotton pads that are higher than the middle area are also installed on the outside of the top bridge board adhesive in the boundary area. The bonding surface of the pearl cotton pad has double-sided tape, and the bonding area cannot be installed in the gap between two flat insulating boards.

[0017] After the adhesive coating of the top bridge board is completed, the top bridge board is immediately moved to the designated work station. After checking the installation direction, the top bridge board is placed in the gap of the main insulation layer of the flat insulation board, and wedges are inserted around the top bridge board to align the edge of the top bridge board with the main insulation layer of the adjacent flat insulation board and center the position. Subsequently, a handheld paving machine is used to roll the top bridge board on the top bridge board to adjust the height of the top bridge board. The rolling direction is to move from the center line of the width direction of the top bridge board to both sides. The adhesive of the top bridge board in the middle area is also squeezed to both sides to fill the gap of the secondary insulation layer first. The adhesive strip of the top bridge board in the boundary area is gradually pressed down to intersect under rolling, and then the gap between the top bridge board and the flexible secondary screen wall is filled.

[0018] When the top surface of the top bridge plate is flush with the top surface of the main insulating layer of the adjacent flat insulating board, place a pressure rod on the top of the top bridge plate, and fix the two ends of the pressure rod in the bolt holes of the main insulating layer of the adjacent flat insulating board with bolts. Check the layer difference between the top bridge plate and the main insulating layer of the adjacent flat insulating board again. If it does not meet the requirements, use the paving machine to roll it again until the layer difference requirements are met, and tighten the bolts on the pressure rod again. At the same time, the entire installation process must be completed within the maximum opening time of the top bridge plate adhesive.

[0019] After the top bridge board adhesive is completely cured, remove the compression rods and wedges to complete the installation of the top bridge board.

[0020] The above-mentioned novel top bridge plate bonding method of the film-type enclosure system further has the bonding thickness of the flexible secondary screen wall adhesive being 0.2mm to 1.2mm, and the thickness of the top bridge plate adhesive being 0.5mm to 4mm.

[0021] The above-mentioned novel film-type enclosure system top bridge board bonding method further has the adhesive coating thickness of 3.3mm to 3.6mm in the middle area and the adhesive coating thickness of the top bridge board in the boundary area is 6mm to 8mm.

[0022] The bonding surface of the top bridge board of the present invention is a prefabricated combined rectangular parallelepiped with an arc-shaped convex reinforced polyurethane foam, plywood, and a rigid secondary screen wall. The adhesive coating method of the top bridge board is divided into a middle area and a boundary area according to the characteristics of the bonding station. The middle part is fully paved, and the boundary area is strip-paved. The strip-shaped top bridge board adhesive coating direction is parallel to the short side of the top bridge board. Due to the arc-shaped convexity of the bonding surface of the top bridge board and the geometric shape of high in the middle and low on both sides, the adhesive of the top bridge board in the middle area is squeezed from the top of the arc to both sides during installation, and the adhesive is preferentially filled with the flexible secondary screen. The gap caused by the secondary insulation gap between the wall and the top bridge board ensures the adhesion effect of the key area in the middle. Secondly, because the boundary area is an adhesive strip parallel to the short side of the top bridge board, the resin strip is short and has many gaps. The gas discharge process between the adhesives during the laying of the top bridge board requires a short stroke and is easy to be discharged during the extrusion process. At the same time, with the use of the flattening machine, the flattening machine rolls the top bridge board along the direction of the adhesive strip, which can quickly install the top bridge board to the specified layer difference range. At the same time, the adhesive is laid evenly and the bubbles are quickly discharged, which improves the adhesion speed and adhesion quality. The amount of glue is precisely controlled in different areas during the coating process, and no longer relies on random control of the glue head. The amount of adhesive in each area is accurately grasped, and the operator does not need to repeatedly debug, saving material and labor costs. On both sides of the adhesive in the middle area, multiple rectangular pads made of pearl cotton are bonded with double-sided tape. The minimum adhesion height of the top bridge adhesive in the middle area can be guaranteed during the rolling of the top bridge board, ensuring the effectiveness of the adhesion. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the interface view of the existing top bridge plate bonding station; Figure 2 It is a three-dimensional view of the back and front sides of the top bridge plate of the present invention; Figure 3 It is a schematic diagram of a bonding station for the intersection area of ​​four planar insulating panels of the present invention; Figure 4 is a cross-sectional view of the top bridge plate bonding station of the present invention; Figure 5 yes Figure 4 Enlarged view of point B in the middle; Figure 6 It is a schematic diagram of the coating method of the top bridge plate adhesive of the present invention; Figure 7 is a cross-sectional view of the top bridge plate adhesive coating of the present invention; Figure 8 It is a three-dimensional view of the installation process of the top bridge plate facade station of the present invention; Fig. 9 This is a schematic diagram of the installation of the pressure rod at the vertical surface station of the top bridge plate of the present invention; Among them, 1-top bridge board adhesive, 2-plane insulation board, 3-glass wool component, 5-flexible secondary screen, 8-rigid secondary screen, 9-reinforced polyurethane foam, 10-plywood, 11-pearl cotton pad, 12-middle area top bridge board adhesive, 13-border area top bridge board adhesive, 15-plane insulation board main insulation layer, 16-wedge block, 17-top bridge board, 18-pressure rod. DETAILED DESCRIPTION

[0024] The specific implementation of the present invention is described in detail below in conjunction with preferred embodiments.

[0025] A new method for bonding the top bridge plate of a membrane type enclosure system, such as Figure 2 As shown, the top bridge board 17 of the novel film-type enclosure system is a cuboid formed by bonding plywood 10, enhanced polyurethane foam 9 and rigid secondary screen 8. The top surface of the enhanced polyurethane foam is a plane and is bonded to the plywood, and the bottom surface is an arc surface and is bonded to the rigid secondary screen. The middle thickness of the top bridge board in the width direction is greater than the thickness on both sides, so as to ensure that the top bridge board adhesive 1 is squeezed outward based on the center line of the top bridge board in the width direction, thereby ensuring that the gap between the flexible secondary screen 5 between the secondary insulating boards and the bottom of the top bridge board is filled with the top bridge board adhesive 1.

[0026] The arc surface of the top bridge plate satisfies the ellipse formula:

[0027] Where W is the width of the top bridge plate; The width W and length of the top bridge plate are adapted to the gap between the insulation modules of the two insulation boards and are easy to install. Figure 3As shown, in order to ensure that when the top bridge board is installed at the intersection of four flat insulating boards 2, and the maximum dose of flexible secondary screen adhesive is used to adhere two cross-intersecting flexible secondary screens 5 below the top bridge board station, after the top bridge board adhesive 1 is applied and installed, the top bridge board top and the adjacent insulating board main layer difference should be controlled between -0.5mm and +0.5mm, and the top bridge board adhesive thickness should not be less than the minimum coating thickness T 4min Among them, T 3 The recommended thickness of the flexible secondary screen adhesive is T 3min =0.2mm to the maximum adhesion thickness T 3max =1.2mm, T 4 The recommended thickness of the top bridge adhesive is the minimum coating thickness T 4min = 0.5mm to the maximum coating thickness T 4max =4mm, so the maximum height of the top bridge plate is, H 1 =H+0.5-2×T 2 -2×T 3max -T 4min ; in, T 2 is the thickness of the flexible secondary shield wall.

[0028] T 3 is the thickness of the flexible secondary screen adhesive.

[0029] T 4 is the thickness of the top bridge plate adhesive.

[0030] H is the height of the main insulation layer of the flat insulation board.

[0031] H 1 It is the maximum height of the top bridge deck.

[0032] In order to ensure that the bonding area between the flexible secondary screen 5 and the top bridge plate can be completely covered by the top bridge plate adhesive 1, and the bubbles generated by the top bridge plate adhesive during bonding can be quickly discharged, the top bridge plate adhesive is applied in an intermediate area and a boundary area, such as Figure 6 As shown. The adhesive in the middle area is fully spread, and the adhesive in the border area is parallel to multiple rows of adhesive strips, and the direction of the strips is parallel to the short side of the top bridge board. Figure 7 As shown, the width of the adhesive of the top bridge plate in the middle area W 1 =T 1 +2X 1 , T 1 is the gap value of the secondary insulation board, X 1 =25mm to 27mm, X 1 It is the adhesive coating width of the top bridge board that exceeds the secondary insulation gap on one side.

[0033] Width of adhesive strip W for top bridge plate in border area 2 =X 6 +2X 2 -W 1 -2X 5 , X 2 = 10mm to 15mm; the maximum distance between any two top bridge adhesives X 5 ≤10mm, X 6 is the width of the flexible secondary screen, X 2 It is the adhesive coating width of the top bridge plate that exceeds the width of the flexible secondary shield wall on one side.

[0034] The adhesive coating thickness in the middle area is controlled between 3.3mm and 3.6mm, and the adhesive coating thickness on the top bridge plate in the boundary area is controlled between 6mm and 8mm.

[0035] In order to ensure the minimum thickness requirement of the top bridge board adhesive in the middle area of ​​the top bridge board, multiple rectangular pads made of pearl cotton need to be installed in the gap between the two sides of the top bridge board adhesive coating area in the middle area and the boundary coating area. In addition, in order to ensure the installation flatness of the top bridge board, multiple pearl cotton pads 11 that are higher than the middle area are also installed on the outside of the top bridge board adhesive in the boundary area. The bonding surface of the pearl cotton pad 11 has double-sided tape, and the bonding area cannot be installed in the gap between the two flat insulating boards 2.

[0036] After the adhesive coating of the top bridge plate is completed, the top bridge plate is immediately moved to the gap between the main insulation layers of the plane insulation plate between the two insulation plates. After checking the installation direction, the top bridge plate is placed in the gap between the main insulation layers 15 of the plane insulation plate. Wedges 16 are inserted around the top bridge plate to align the edge of the top bridge plate with the adjacent main insulation layer and center the position. Figure 8 Then, a handheld paving machine is used to roll the top bridge board to adjust the height of the top bridge board. The rolling direction is to move from the center line of the top bridge board in the width direction to both sides. Figure 8 In the direction indicated by the middle arrow, the top bridge board adhesive 12 in the middle area is also squeezed to both sides, preferentially filling the gaps in the secondary insulation layer. The top bridge board adhesive strips in the boundary area are gradually pressed down to intersect under rolling, and then fill the gap between the top bridge board and the flexible secondary screen 5. Because the paving machine has a vibration function, the flow speed of the top bridge board adhesive can be accelerated under vibration, making the coating more uniform and allowing the bubbles inside to be quickly discharged along the width of the top bridge board. When the top surface of the top bridge board is flush with the top surface of the main insulation layer of the adjacent flat insulation board, a pressure rod is placed on the top of the top bridge board, and the two ends of the pressure rod are fixed in the bolt holes of the main insulation layer of the adjacent flat insulation board by bolts, such as Fig. 9As shown, check the difference between the top bridge plate and the main insulation layer of the adjacent flat insulation board again. If it does not meet the requirements, use the paving machine to roll it again until the difference meets the requirements, and tighten the bolts on the pressure rod 18 again. At the same time, the entire installation process must be completed within the maximum opening time of the top bridge plate adhesive. After the top bridge plate adhesive is completely cured, remove the pressure rod 18 and the wedge 16 to complete the installation of the top bridge plate.

Claims

1. A novel method for bonding the top bridge plate of a membrane type enclosure system, characterized in that: The top bridge plate (17) of the novel film-type enclosure system is a rectangular parallelepiped formed by sequentially bonding a plywood (10), a reinforced polyurethane foam (9) and a rigid secondary screen wall (8); the upper surface of the reinforced polyurethane foam (9) is a plane and is bonded to the plywood (10); the bottom surface is an arc surface convex outward from the center and is bonded to the rigid secondary screen wall (8); The arc surface of the top bridge plate (17) satisfies the ellipse formula: ； Wherein, W is the width of the top bridge plate (17); The width W and length of the top bridge plate (17) are adapted to the gap between the insulation modules of the main layers of the two insulation plates; After the top bridge board (17) is coated with the top bridge board adhesive (1) and installed, the height difference between the top of the top bridge board (17) and the main layer of the adjacent insulation board should be controlled between -0.5mm and +0.5mm, and the thickness of the top bridge board adhesive (1) should not be less than the minimum coating thickness T 4min The maximum height of the top bridge plate (17) is, H1=H+0.5-2×T2-2×T 3max -T 4min ; in, T2 is the thickness of the flexible secondary screen (5); T3 is the thickness of the flexible secondary screen adhesive; T4 is the thickness of the top bridge plate adhesive (1); H is the height of the main insulating layer (15) of the flat insulating board; H1 is the maximum height of the top bridge plate (17); When the top bridge plate adhesive (1) is applied, it is divided into a middle area and a boundary area. The top bridge plate adhesive (12) in the middle area is fully spread, and the top bridge plate adhesive (13) in the boundary area is a plurality of parallel rows of top bridge plate adhesive strips, and the direction of the strips is parallel to the width of the top bridge plate (17); The width of the top bridge board adhesive (12) in the middle area is W1=T1+2X1, where T1 is the gap value of the secondary insulation board, and X1=25mm to 27mm, where X1 is the coating width of the top bridge board adhesive (1) that exceeds the secondary insulation gap on one side; The width of the adhesive strip of the top bridge plate in the boundary area is W2=X6+2X2-W1-2X5, X2=10mm to 15mm; the maximum distance X5 between any two top bridge plate adhesives (1) is ≤10mm, X6 is the width of the flexible secondary screen wall (5), and X2 is the coating width of the top bridge plate adhesive (1) that exceeds the width of the flexible secondary screen wall (5) on one side; A plurality of rectangular pads made of pearl cotton are installed in the gap between the two sides of the coating area of ​​the top bridge plate adhesive (12) in the middle area and the boundary coating area, and a plurality of pearl cotton pads (11) higher than the middle area are also installed on the outside of the top bridge plate adhesive (13) in the boundary area. The bonding surface of the pearl cotton pad (11) has double-sided adhesive, and the bonding area cannot be installed in the gap between the two flat insulating plates (2); After the top bridge plate adhesive (1) is applied, the top bridge plate (17) is immediately moved to the gap between the main insulating layers (15) of the plane insulating plate between the two insulating plates. After checking the installation direction, the top bridge plate (17) is placed in the gap between the main insulating layers (15) of the plane insulating plate. Wedges (16) are inserted around the top bridge plate (17) so that the edge of the top bridge plate (17) is aligned with the main insulating layers (15) of the adjacent plane insulating plates and the position is centered. Subsequently, a handheld paving machine is used to roll the top bridge plate (17) on the top bridge plate (17) to adjust the height of the top bridge plate (17). The rolling direction is to move from the center line of the width direction of the top bridge plate (17) to both sides. The top bridge plate adhesive (12) in the middle area is also squeezed to both sides to preferentially fill the gap between the secondary insulating layers. The top bridge plate adhesive strip in the boundary area is gradually pressed down to intersect under rolling, thereby filling the gap between the top bridge plate (17) and the flexible secondary screen wall (5). When the top surface of the top bridge plate (17) is flush with the top surface of the main insulating layer (15) of the adjacent flat insulating plate, a pressure rod (18) is placed on the top of the top bridge plate (17), and the two ends of the pressure rod (18) are fixed in the bolt holes of the main insulating layer (15) of the adjacent flat insulating plate by bolts. The level difference between the top bridge plate (17) and the main insulating layer (15) of the adjacent flat insulating plate is checked again. If the requirement is not met, the leveling machine is used to roll the top bridge plate (17) again until the level difference requirement is met, and the bolts on the pressure rod (18) are tightened again. At the same time, the entire installation process must be completed within the maximum opening time of the top bridge plate adhesive (1); After the top bridge plate adhesive (1) is completely cured, the pressure rod (18) and the wedge block (16) are removed to complete the installation of the top bridge plate (17).

2. A novel method for bonding the top bridge plate of a membrane type enclosure system according to claim 1, characterized in that: The bonding thickness of the adhesive of the flexible secondary screen wall (5) is 0.2mm to 1.2mm, and the thickness of the adhesive of the top bridge plate (1) is 0.5mm to 4mm.

3. According to the novel film type enclosure system top bridge board bonding method of claim 1, it is characterized in that: The coating thickness of the top bridge plate adhesive (12) in the middle area is 3.3 mm to 3.6 mm, and the coating thickness of the top bridge plate adhesive (13) in the boundary area is 6 mm to 8 mm.

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