Tool for pasting track board on secondary screen wall and design method

Abstract

The invention provides a secondary screen wall pasting track plate tool and a design method, the tool comprises a supporting fixing plate, the supporting fixing plate comprises a first fixing plate and second fixing plates, the extension direction of the first fixing plate is perpendicular to the extension direction of a first gap, the second fixing plates are arranged close to the two ends of the first fixing plate respectively, and the second fixing plates are arranged close to the two ends of the first gap respectively; the second fixing plate and the first fixing plate are located in the same plane and are perpendicular to each other, the first fixing plate and the second fixing plate are each provided with a plurality of open holes formed at intervals, the first fixing plate is provided with a first gap, and the first fixing plate and the second fixing plate are connected with the main insulating layer through at least part of the open holes; the track plate is connected to the supporting and fixing plate, the extending direction of the track plate is the same as that of the supporting and fixing plate, and the track plate is used for supporting the automatic pasting machine so that the automatic pasting machine can conduct pasting operation along the second gap. The tool has the advantages of being high in applicability, easy to operate, low in cost, firm in installation and not prone to deformation.

Description

Technical Field

[0001] The invention relates to the field of secondary screen wall pasting, and in particular to a secondary screen wall pasting track plate tooling and a design method. Background Art

[0002] At present, the mainstream cargo containment system of LNG ships is the MARKⅢ membrane containment system, which is mainly composed of the main barrier layer, the secondary barrier layer, the main insulation layer and the secondary insulation layer. During the operation of LNG ships, if the main barrier leaks, the secondary barrier can play a good sealing role, preventing the ultra-low temperature LNG liquid from directly contacting the hull structure, and ensuring that LNG will not leak through the secondary barrier to the liquid tank wall and affect the hull structure for at least 15 days.

[0003] As one of the important components of the enclosure system, the secondary screen wall is mainly divided into manual pasting and automatic pasting during construction. Automatic pasting accounts for 80% of the total secondary screen wall construction, and manual pasting accounts for 20%. Therefore, the construction speed and quality of automatic pasting affect the construction speed and quality of the entire enclosure system.

[0004] The automatic pasting of the secondary screen wall is divided into horizontal pasting and vertical pasting, both of which are pasted by an automatic pasting machine. When in use, it is installed on the insulating board, and driven to move in the gap between the insulating boards and on the track plate tooling to perform pasting work. Since the automatic pasting machine is a high-precision equipment and performs pasting work in the process of continuous movement, the automatic pasting machine has very high requirements for the track plate. In previous pasting, there were many accidents that caused damage to the automatic pasting machine and the suspension of secondary screen wall pasting due to problems such as the loose installation of the track plate tooling, the easy installation errors of multiple tooling models, the surface was not smooth enough, and the horizontal and vertical tooling were not universal. Therefore, the track plate tooling of the automatic pasting machine has become a key tooling that affects the secondary screen wall pasting project cycle and even the enclosure system construction cycle. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the related art, the object of the present invention is to provide a secondary screen wall track plate pasting tooling and design method.

[0006] To achieve the above-mentioned purpose and other related purposes, the present invention provides a secondary screen wall pasting track plate tooling, the tooling is used to support when an automatic pasting machine is used to construct a containment system, the containment system includes a main insulation layer and a secondary insulation layer, the main insulation layer is provided with a first gap, the secondary insulation layer is provided with a second gap, the second gap is located below the first gap and is connected, the tooling includes: a support fixing plate, the support fixing plate includes a first fixing plate and a second fixing plate, the extension direction of the first fixing plate is perpendicular to the extension direction of the first gap, a second fixing plate is respectively arranged near both ends of the first fixing plate, the second fixing plate and the first fixing plate are located in the same plane and are perpendicular to each other, a plurality of openings arranged at intervals are respectively provided on the first fixing plate and the second fixing plate, the first fixing plate sets up the first gap, the first fixing plate and the second fixing plate are connected to the main insulation layer through at least some of the openings; a track plate, connected to the support fixing plate, and the extension direction of the track plate is the same as the extension direction of the support fixing plate, the track plate is used to support the automatic pasting machine so that the automatic pasting machine performs pasting operations along the second gap.

[0007] Optionally, the opening is a waist-shaped hole.

[0008] Optionally, the waist-shaped hole is at a distance of not less than 20 mm from an edge of the first fixing plate or the second fixing plate.

[0009] Optionally, the secondary screen wall track plate pasting tooling further includes a plurality of positioning plates, which are arranged at both ends of the second fixing plate along the extension direction of the second fixing plate, and the positioning plates are configured to be plugged into the main insulating layer.

[0010] Optionally, the supporting fixing plate is made of stainless steel, and the track plate is made of plywood.

[0011] A design method is used to design a secondary screen wall track plate pasting tooling as described above, the steps of the design method comprising: collecting insulation board production design drawings, determining the location and number of openings according to the drawings; determining the materials used to make the tooling, and conducting pollution tests on the materials; making tooling samples and conducting laboratory tests and actual ship tests on the tooling.

[0012] Optionally, the step of performing a contamination test on the material includes: rubbing the material to be used on both sides of the second gap, then using an automatic pasting machine to perform pasting operations, and after waiting for the glue to cure, performing a shear test.

[0013] Optionally, the laboratory test items include: the position offset of the track plate does not exceed 1mm when the automatic pasting machine is running; checking the glue overflow status after the pasting operation is completed, and judging the degree of shaking based on the edge of the glue overflow; whether there is a risk of falling when the automatic pasting machine is stopped in an emergency; testing whether the pasting pressure applied by the automatic pasting machine during the use of tooling meets the requirements.

[0014] Optionally, the requirement for the pasting pressure is: the instantaneous maximum pressure is required to be greater than or equal to 300 mbar.

[0015] Optionally, the items of the actual ship test include: no wrinkles appear on the secondary screen wall layer pasted by the automatic pasting machine; the thickness of the glue used to paste the secondary screen wall layer is 0.2-1.2mm; ripples appear on the secondary screen wall layer, the height of the ripples is ≤0.8mm, and the distance from the edge of the secondary screen wall layer is ≤40mm; if bubbles appear in the glue, the bubble diameter cannot be greater than 8mm, if non-circular bubbles appear, the length of the non-circular bubbles cannot exceed twice the maximum diameter of the bubbles and the equivalent area is not greater than 50mm2.

[0016] As described above, the secondary screen wall track plate pasting tooling and design method of the present invention have the following beneficial effects: the main components of the tooling have a simple structure, and the raw materials are common and cheap, which can greatly reduce the cost for batch application; the tooling is easy to operate and does not require special additional training for operators; the tooling does not require later maintenance, which reduces the investment in later maintenance and eliminates the waiting time caused by maintenance; the tooling is provided with a plurality of openings, and suitable openings can be selected for connection according to different ship types and different liquid tanks, so that the tooling has high versatility and can be suitable for automatic pasting construction scenarios, and the structure is simple, stable, and strong, with an extremely long service life, which greatly reduces the repurchase cost of the tooling; the tooling can be commonly used in ships under construction, which is convenient for the deployment and borrowing of the tooling according to the cycle, greatly improving the fault tolerance rate of automatic pasting construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram showing the use status of the tooling for pasting the track plate on the secondary screen wall in an embodiment of the present invention.

[0018] Figure 2 It is a schematic diagram of the track plate pasting tooling for the secondary screen wall in an embodiment of the present invention.

[0019] Component number description

[0020] 1. Fixing nut; 2. Fixing bolt; 3. Track plate; 4. Positioning plate; 5. Positioning nut; 6. Positioning bolt; 7. First fixing plate; 8. Second fixing plate; 9. Waist-shaped hole; 10. Main insulating layer; 20. Secondary insulating layer; 30. First gap; 40. Second gap. DETAILED DESCRIPTION

[0021] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0022] For example, when describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional view showing the device structure will not be partially enlarged according to the general scale, and the schematic view is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional space dimensions of length, width and depth should be included.

[0023] For ease of description, spatial relational terms such as "under", "below", "below", "below", "above", "on", etc. may be used herein to describe the relationship of one element or feature shown in the drawings to other elements or features. It will be understood that these spatial relational terms are intended to include other directions of the device in use or operation in addition to the directions depicted in the drawings. In addition, when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or there can be one or more intervening layers. As used herein, "between..." means including the end point values.

[0024] In the context of the present application, a structure in which a first feature is described as being "above" a second feature may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact.

[0025] It should be noted that the illustrations provided in this embodiment are only used to illustrate the basic concept of the present invention in a schematic manner, and therefore the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0026] like Figure 1As shown, the enclosure system includes a main screen layer, a secondary screen layer and an insulating layer. Usually, the main screen layer, the secondary screen layer and the insulating layer are arranged in such a way that an insulating layer (called the main insulating layer 10) is arranged outside the main screen layer, and then a secondary screen layer is arranged outside the insulating layer, and finally an insulating layer (called the secondary insulating layer 20) is arranged outside the secondary screen layer. Both the main insulating layer 10 and the secondary insulating layer 20 are composed of a plurality of insulating boards, and there is a gap between two adjacent insulating boards. Since the function of the secondary screen layer is to seal the LNG liquid, the gap between two adjacent insulating boards in the secondary insulating layer 20 needs to be filled with glue to adhere the secondary screen layer, thereby sealing. The secondary screen layer filled in the gap is called a flexible secondary screen layer, and the secondary insulating layer 20 itself is provided with a screen layer on the side facing the secondary screen layer, and the screen layer is called a rigid secondary screen layer. When the flexible screen layer is constructed, a complete secondary screen layer is formed between the two insulating layers.

[0027] like Figure 1 and Figure 2 As shown, currently, an automatic pasting machine is usually used to perform pasting operations at the gap between two adjacent insulating plates. For ease of description, the gap between two adjacent insulating plates in the main insulating layer 10 is a first gap 30, and the gap between two adjacent insulating plates in the secondary insulating layer 20 is a second gap 40. In order to enable the automatic pasting machine to smoothly move along the second gap 40 for pasting operations, this embodiment provides a secondary screen wall pasting track plate 3 tooling, which is mounted on the main insulating layer 10 to provide support for the automatic pasting machine, so that the automatic pasting machine can continuously move along the second gap 40, thereby performing pasting operations on the second gap 40.

[0028] The secondary screen wall track plate 3 pasting tooling includes a supporting fixing plate, a fixing nut 1, a fixing bolt 2, a track plate 3, a positioning plate 4, a positioning nut 5 and a positioning bolt 6.

[0029] The supporting fixing plate includes a first fixing plate 7 and a second fixing plate 8. The first fixing plate 7 is a strip plate. The number of the second fixing plates 8 is two. The two second fixing plates 8 are respectively arranged near the two ends of the first fixing plate 7, and the two second fixing plates 8 are arranged perpendicular to the first fixing plate 7, and the second fixing plates 8 are located in the same plane as the first fixing plate 7. A plurality of waist-shaped holes 9 are respectively opened at the two ends of the first fixing plate 7, for example, there are two waist-shaped holes 9 at each end, and the two waist-shaped holes 9 are arranged along the length direction of the first fixing plate 7, and the lengths of the two waist-shaped holes 9 may be different. By arranging two second fixing plates 8 on the first fixing plate 7, the contact area with the insulating plate can be increased, the stability of the tooling can be enhanced, and the tooling is not easily deformed during use.

[0030] Each second fixing plate 8 is also provided with a plurality of waist-shaped holes 9. There are two waist-shaped holes 9 on each second fixing plate 8. The two waist-shaped holes 9 are arranged along the length direction of the first fixing plate 7. The lengths of the two waist-shaped holes 9 can be different or the same. In order to avoid weakening the strength of the first fixing plate 7 and the second fixing plate 8, the distance between the waist-shaped hole 9 and the edge of the first fixing plate 7 or the second fixing plate 8 is not less than 20 mm.

[0031] Since the types of insulating boards are complex and diverse, and the positions of the process holes on insulating boards of different models are very different, it is often necessary to prepare various specifications of tooling during construction. By providing waist-shaped holes 9 on the first fixed plate 7 and the second fixed plate 8, the versatility of the tooling can be improved, so that the tooling can meet the needs of insulating boards of various specifications, which can not only save costs but also improve construction efficiency.

[0032] The track plate 3 abuts against the first fixing plate 7 and is located between the two second fixing plates 8. There are multiple fixing bolts 2, which are arranged at intervals and are simultaneously passed through the first fixing plate 7 and the track plate 3. The number of fixing nuts 1 is the same as the number of fixing bolts 2. A fixing nut 1 is threadedly connected to each fixing bolt 2. The track plate 3 and the first fixing plate 7 are connected by the fixing bolts 2 and the fixing nuts 1.

[0033] There are two positioning plates 4, which are respectively arranged at the two ends of the track plate 3 along the length direction of the first fixing plate 7, and are both located on the side of the track plate 3 away from the first fixing plate 7. Two positioning bolts 6 are passed through each positioning plate 4, and the positioning bolts 6 pass through the track plate 3 at the same time. Each positioning bolt 6 is threadedly connected to a positioning nut 5, and the track plate 3 and the positioning plate 4 are connected by the positioning bolts 6 and the positioning nuts 5. A groove structure is provided on the first insulating plate, and the positioning plate 4 is inserted into the groove. When the support fixing plate and the positioning plate 4 are connected and fixed, the outer side surface of the track plate 3 and the side surface of the insulating plate are in the same plane, for example, the top surface of the track plate 3 is flush with the top surface of the insulating plate.

[0034] The supporting and fixing plates and the positioning plates 4 of this embodiment are both made of 304 stainless steel, and the track plate 3 is plywood. Since the supporting and fixing plates and the positioning plates 4 are both made of 304 stainless steel, the strength of the overall tooling can be improved, deformation can be avoided, and the pasting operation of the automatic pasting machine can be avoided.

[0035] Before using the automatic pasting machine, the supporting fixing plate is first set on the insulating plate in the main insulating layer 10, wherein at least part of the waist-shaped holes 9 on the first fixing plate 7 and the second fixing plate 8 are fixedly connected to the insulating plate by bolts and bolts. The positioning plate 4 is inserted into the groove in the main insulating layer 10. At this time, a secondary screen wall pasting track tooling is installed. Multiple such tools can be arranged at intervals along the first gap 30 as needed. Next, the automatic pasting machine is installed in the first gap 30 and started. The automatic pasting machine moves along the first gap 30 and pastes the second gap 40. During the movement of the automatic pasting machine, the track plates 3 of multiple tools support the automatic pasting machine, so that the automatic pasting machine moves continuously, thereby forming a continuous flexible secondary screen wall layer in the second gap 40.

[0036] This embodiment also provides a design method for a secondary screen wall track pasting tooling, the method comprising the following steps:

[0037] Collect the production design drawings of insulation boards. Since the positions of process holes on different types of insulation boards are different, in order to achieve the universality of the tooling, the position data of process holes of various insulation boards are summarized by consulting the drawings.

[0038] Design of openings on the support and fixing plate. The position and number of openings on the support and fixing plate are determined according to the position data of the process holes of the insulation board, and the openings are required to cover the process hole positions of all insulation boards. Along the width direction of the support and fixing plate, the distance between the openings and the edge is not less than 20mm, so that it has a lighter weight while meeting the load-bearing requirements, not easy to deform, and not vibrate.

[0039] Determine the materials used to make the tooling, and conduct a pollution test on the materials. Since the containment system has high chemical and physical stability for materials entering the liquid tank from the outside and cannot chemically react with any installation materials in the liquid tank or affect the installation performance, a pollution test experiment is required. After determining the materials used for the support and fixing plates, the positioning plates 4, and the track plates 3, for example, the support and fixing plates and the positioning plates 4 use 304 stainless steel, and the track plates 3 use plywood, the above materials are fully rubbed on the rigid secondary screen layer (i.e., on both sides of the second gap 40), and then the flexible secondary screen layer is glued on it with glue according to the normal pasting process. After waiting for the glue to cure, a shear test is performed to check whether the flexible secondary screen meets the use requirements.

[0040] Make tooling samples and conduct experimental tests. The tests include laboratory tests and actual ship tests. The laboratory tests mainly test the pressure bearing capacity, smoothness, fit with the insulation board, integration with the automatic pasting machine, and convenience of installation of the tooling. Install the tooling on the insulation board of the simulated laboratory, place the automatic pasting machine according to the process requirements, and then start the automatic pasting machine according to the normal construction process. Finally, the tooling is evaluated and tested. For example, when evaluating the safety and stability of the tooling, the specific operations include: the position offset of the track plate 3 does not exceed 1mm when the automatic pasting machine is running; check the overflow status after the pasting operation is completed, and judge the degree of shaking according to the edge of the overflow; whether there is a risk of falling when the automatic pasting machine stops in an emergency; whether the pasting at the stop position is acceptable, etc.

[0041] In order to ensure that the glue is fully combined with the pasting surface during pasting, it is necessary to test the pasting pressure applied by the automatic pasting machine. The specific operation is: place the pressure blanket at the position where the flexible secondary screen is pasted, and perform normal pasting operations in the absence of glue. When the automatic pasting machine passes through the pressure blanket, the pressure blanket will measure the pressure, and the instantaneous maximum pressure is required to be evenly distributed and greater than or equal to 300mbar.

[0042] After the laboratory test, a simulated real ship bonding was carried out, and the bonded samples were peeled off, the glue thickness was measured and the bubbles were observed to evaluate the impact of tooling on the bonding performance.

[0043] The evaluation items include: Check whether the glue is 100% squeezed out in the length direction of the paste. The flexible secondary screen layer cannot have wrinkles (wrinkles). The thickness of the glue used to paste the flexible secondary screen layer is 0.2-1.2mm. Corrugations appear on the flexible secondary screen layer, the height of the corrugations is ≤0.8mm, and the distance from the edge of the flexible secondary screen is ≤40mm. If bubbles appear in the glue (diameter greater than or equal to 2mm), the bubbles should have no sharp edges, the bubble diameter cannot be greater than 8mm, and no transverse bubble bands (when at least three bubbles are less than 15mm apart) can appear in the glue. If non-circular bubbles appear in the glue, the length of the non-circular bubbles cannot exceed twice the maximum diameter of the bubbles (the length of the non-circular bubbles cannot exceed 16mm) and the equivalent area is not greater than 50mm2.

[0044] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A tool for pasting track plates on a secondary screen wall, the tool being used to support the construction of a containment system using an automatic pasting machine, the containment system comprising a primary insulating layer and a secondary insulating layer, the primary insulating layer being provided with a first gap, the secondary insulating layer being provided with a second gap, the second gap being located below the first gap and being connected, characterized in that: The tooling includes: A support fixing plate, the support fixing plate comprises a first fixing plate and a second fixing plate, the extension direction of the first fixing plate is perpendicular to the extension direction of the first gap, a second fixing plate is respectively arranged near both ends of the first fixing plate, the second fixing plate and the first fixing plate are located in the same plane and are perpendicular to each other, a plurality of openings arranged at intervals are respectively arranged on the first fixing plate and the second fixing plate, the first fixing plate frames the first gap, and the first fixing plate and the second fixing plate are connected to the main insulating layer through at least part of the openings; A track plate is connected to the supporting and fixing plate, and the extension direction of the track plate is the same as the extension direction of the supporting and fixing plate. The track plate is used to support the automatic pasting machine so that the automatic pasting machine performs pasting operations along the second gap.

2. The secondary screen wall track plate pasting tooling according to claim 1 is characterized in that: The opening is a waist-shaped hole.

3. The secondary screen wall track plate pasting tooling according to claim 2 is characterized in that: The distance between the waist-shaped hole and the edge of the first fixing plate or the second fixing plate is not less than 20 mm.

4. The secondary screen wall track plate pasting tooling according to claim 1 is characterized in that: The secondary screen wall track plate pasting tooling also includes a plurality of positioning plates, which are arranged at both ends of the second fixing plate along the extension direction of the second fixing plate, and the positioning plates are configured to be plugged into the main insulating layer.

5. The secondary screen wall track plate pasting tooling according to claim 1 is characterized in that: The supporting and fixing plate is made of stainless steel, and the track plate is made of plywood.

6. A design method for designing a secondary screen wall track plate pasting tooling as claimed in any one of claims 1 to 5, characterized in that: The steps of the design method include: Collect the production design drawings of the insulation board and determine the location and quantity of the openings according to the drawings; Determine the materials used to make tooling and conduct contamination tests on the materials; Make tooling samples and conduct laboratory tests and actual ship tests on the tooling.

7. The design method according to claim 6, characterized in that: The steps of performing a contamination test on the material include: rubbing the material to be used on both sides of the second gap, then using an automatic pasting machine to perform pasting operations, and after waiting for the glue to be cured, performing a shear test.

8. The design method according to claim 6, characterized in that: The laboratory test items include: the position offset of the track plate does not exceed 1mm when the automatic pasting machine is running; checking the glue overflow status after the pasting operation is completed, and judging the degree of shaking based on the edge of the glue overflow; whether there is a risk of falling when the automatic pasting machine is stopped in an emergency; and testing whether the pasting pressure applied by the automatic pasting machine during the use of tooling meets the requirements.

9. The design method according to claim 8, characterized in that: The requirement for pasting pressure is: the instantaneous maximum pressure must be greater than or equal to 300mbar.

10. The design method according to claim 6, characterized in that: The items of the actual ship test include: no wrinkles appear on the secondary screen wall layer pasted by the automatic pasting machine; the thickness of the glue used to paste the secondary screen wall layer is 0.2-1.2mm; ripples appear on the secondary screen wall layer, the height of the ripples is ≤0.8mm, and the distance from the edge of the secondary screen wall layer is ≤40mm; if bubbles appear in the glue, the bubble diameter cannot be greater than 8mm, if non-circular bubbles appear, the length of the non-circular bubbles cannot exceed twice the maximum diameter of the bubbles and the equivalent area is not greater than 50mm2.

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