KR100748819B1 - Insulation panel fixing device for cargo containment system of lng carrier - Google Patents

Abstract

An insulation panel fixing apparatus for a cargo containment system of an LNG carrier is provided to fix first and second insulation panels of an insulation container for storing and transporting LPG by using a spring whose resilient deformation is large. An insulation panel fixing apparatus for a cargo containment system of an LNG carrier includes a tongue(3), a tensile spring(4), and a fastening and fixing unit(5). A spring catching hole is punched at a central portion of the upper side of the tongue. A catching piece inserted into a catching recess formed at an upper portion of a second insulation panel is bent. The longitudinal cross-section of the tongue is substantially L-shaped. A nut engaging screw thread is formed at an upper portion of the tensile spring and a catching hook inserted into the catching hole of the tongue is formed at a lower portion thereof. The tensile spring is resiliently installed between the tongue and the fastening and fixing unit. The fastening and fixing unit includes a fixing plate and a nut. The fastening and fixing unit fixes two adjacent first insulation panels to the second insulation panel through the tensile spring and the tongue.

Description

Insulation panel fixing device for cargo containment system of LNG carrier

1 is a perspective view showing the amount of shrinkage displacement of the primary insulation plate according to the initial fastening and hydrostatic pressure when the conventional primary insulation plate is fixed using a hook-type bolt.

2 is an exploded perspective view of the apparatus of the present invention.

Figure 3 is a perspective view of the coupled state of the device of the present invention.

Figure 4 is an enlarged partial cross-sectional view showing a state in which the insulation plate is fixed to the cargo hold of the LNG carrier using the present invention device.

Explanation of symbols on the main parts of the drawings

1: primary insulation board 2: secondary insulation board

3: tongue 4: tension spring

5: fastening and fixing means 6: countersunk screw

11, 21: plywood 12: hanging jaw

13: gap 22: groove

31: spring engaging hole 32: locking piece

41: nut coupling thread 42: hook

51: fixing plate 52: nut

511: threaded part through hole 512: wing part

513: step portion 514: countersunk screw coupling hole

The present invention relates to an insulation plate fixing device of the LNG carrier cargo hold, more specifically, the primary and secondary of the insulation container for the storage and transportation of liquefied gas using a spring having a large elastic deformation compared to the tongue, bolt and hook-type bolt, etc. Fastening state of the primary and secondary insulation plates by fixing the insulation plate so that the tensile force of the spring can be maintained even if the shrinkage deformation of the insulation material is sufficiently absorbed even if the shrinkage deformation of the insulation material occurs due to the load action such as LNG head pressure and thermal stress. It is invented to keep it good.

Today, the low temperature liquefaction method is mainly used to store and transport large quantities of substances such as hydrogen, oxygen, and natural gas (i.e., liquefied gas). To this end, in the design of thermal insulation containers for storing and transporting low temperature liquefied gas, The insulation technology that prevents boiling of liquefied gas by heat transfer from the outside and the cryogenic liquefied gas leakage prevention technology for securing the hull's safety are most important.

The current commercial insulation method is a membrane insulation system of GTT in France having a double barrier structure based on the middle barrier structure (US Pat. 484358) of McDonnell Douglas, USA.

Such a conventional heat insulation system is composed of a double structure consisting of the upper primary insulating plate and the lower secondary insulating plate, the upper portion of each of the primary and secondary insulating plates are made of stainless steel and 36% or more Ni to maintain airtightness. Insulation barriers are made of metal such as Invar steel made of Fe-Ni alloy, which hardly expands from cryogenic temperature (≤-163 ° C) to room temperature or higher, and separates primary and secondary insulation plates. In order to fix them, the French patent FR2462336 uses a tongue, the French patent FR2361601 uses a bolt, and the French patent FR2413260 uses a hook-type bolt to fix each other.

However, when the primary heat insulating plate is fixed and assembled with the secondary heat insulating plate by using a tongue, a bolt and a hook-type bolt as described above, when LNG head pressure and thermal stress are applied to the upper surface of the barrier of the primary heat insulating plate, As the weak stiffness shrinks and deforms due to the working load, the tongues, bolts and hook-type bolts, which have relatively small shrinkage deformation, become loose in the initial assembly state, or the nut and bolt fixing plate are separated. There is a problem that the fastening force between the insulation plate is lost.

On the other hand, Figure 1 shows a perspective view showing the amount of shrinkage displacement of the primary insulation plate due to the initial fastening and hydrostatic pressure when the conventional primary insulation plate is fixed by using a hook-type bolt, accordingly to fix the primary and secondary insulation plates When the hook-type bolt is replaced, it can be seen that the primary insulation plate contracts and deforms about 0.11 mm as shown in the left perspective view of FIG. 1 by the fastening force of the hook-type bolt.

When the head pressure caused by LNG overlaps the upper surface of the primary insulation board in the initial assembled state contracted and deformed by the fastening of the hook-type bolt, the primary insulation board is further contracted as shown in the right perspective view of FIG. As deformation occurs, the bolts float by 0.971 mm as a whole, and thus the fastening force between the primary and secondary insulation plates is lost.

The present invention has been devised to solve such a conventional problem, the primary and secondary insulation plates of the insulation container for the storage and transportation of liquefied gas using a spring having a large elastic deformation amount compared to the tongue, bolt and hook-type bolt, etc. By securing the tension force of the tension spring, even if the shrinkage strain of the insulation is sufficiently absorbed by the load action such as LNG head pressure and thermal stress, the tension force of the tension spring can be maintained. It is an object of the present invention to provide an insulation plate fixing device for LNG carrier cargo hold which can be maintained well.

Insulating plate fixing device of the present invention for achieving the above object, in configuring the insulation plate failure device for coupling the primary and secondary insulation plates with plywood attached to the upper and lower surfaces, the spring engaging hole is drilled in the upper center and the bottom One side portion includes a tongue that is bent to be caught in the engaging groove formed in the upper plywood of the secondary heat insulating plate is bent to form a longitudinal cross-section "b"; A tension spring provided with a nut coupling thread at an upper portion thereof, and a lower portion having a hook ring formed at a lower portion of the tongue by a engagement hole, the tension spring being elastically fixed between the tongue and the binding and fixing means; It is composed of a fixing plate having a threaded through-hole in the center and coupled to the engaging jaw of the upper plywood of the primary insulation board adjacent to each other in the form of a hook, and a nut coupled to the nut coupling thread of the tension spring And a binding and fixing means for fixing two adjacent primary insulation plates to the secondary insulation plate through the tension spring and the tongue.

" 형상을 갖도록 철판을 절곡 형성하여, 양측 날개부는 서로 인접한 1차 단열판의 상부 합판에 형성된 걸림턱에 걸려지고 하방부를 향해 절곡 형성된 단차부는 서로 인접한 상기 1차 단열판의 상부 합판 사이의 틈새에 끼워져 걸려지도록 한 것을 특징으로 한다.At this time, the longitudinal section of the fixing plate of the binding and fixing means "

"Bending the steel plate to have a shape, so that both wing parts are caught by the latching jaw formed on the upper plywood of the primary insulation board adjacent to each other, and the stepped portion bent toward the lower portion is sandwiched by a gap between the upper plywood of the primary insulation board adjacent to each other. It is characterized by the loss.

In addition, if necessary, one side wing portion of the fixing plate is formed with a countersunk screw coupling hole so that the fixing plate itself can be fixed to the upper plywood of the one side primary insulation plate through the countersunk screw.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 shows an exploded perspective view of the device of the present invention, Figure 2 is a perspective view of the combined state of the device of the present invention, Figure 3 is a partially enlarged cross-sectional view showing a state in which the insulation plate is fixed to the cargo hold of the LNG carrier using the device of the present invention. 4 is a perspective view showing the amount of shrinkage displacement of the primary insulation plate according to the initial tightening and hydrostatic pressure action when fixed using the device of the present invention.

According to this, the insulation board fixing device of the present invention, the insulation board failure to couple the primary and secondary insulation boards (1) and (2) of the polyurethane foam (PUF) is attached to the top and bottom, respectively, attached to the plywood (11, 21) In configuring the device,

A spring engaging hole 31 is drilled in the upper center, and a locking piece 32 that is fitted into the locking groove 22 formed in the upper plywood 21 of the secondary insulation plate 2 is bent and formed as a whole of the bottom surface. A tongue 3 whose longitudinal section has a "b" shape;

The upper portion is provided with a thread for coupling the nut 41 and the lower portion has a configuration in which the engaging ring 42 is fitted into the engaging hole 31 of the tongue 3 and is fastened to the tongue 3. 5) a tension spring (4) is fixedly installed between;

A fixing plate 51 having a threaded portion through-hole 511 at the center thereof and coupled to the engaging jaw 12 formed at the upper plywood 11 of the primary insulation board 1 adjacent to each other in such a manner that both ends thereof are caught; It consists of a nut 52 coupled to the nut coupling thread 41 of the tension spring 4, the two primary insulation plates 1 adjacent to each other through the tension spring 4 and the tongue 3 Characterized in that consisting of; binding and fixing means (5) for fixing to the vehicle heat insulating plate (2).

" 형상을 갖도록 철판을 절곡 형성하여, 양측 날개부(512)는 서로 인접한 1차 단열판(1)의 상부 합판(11)에 형성된 걸림턱(12)에 걸려지고 하방부를 향해 절곡 형성된 단차 부(513)는 서로 인접한 상기 1차 단열판(1)의 상부 합판(11) 사이의 틈새(13)에 끼워져 걸려지도록 한 것을 특징으로 한다.At this time, the fixing plate 51 of the binding and fixing means 5 has a longitudinal section "

By bending the iron plate to have a shape, both wing portions 512 are caught on the locking projections 12 formed on the upper plywood 11 of the primary insulation board 1 adjacent to each other and bent toward the lower portion 513. ) Is sandwiched between the gaps 13 between the upper plywood 11 of the primary heat insulating plate 1 adjacent to each other.

In addition, if necessary, one side wing portion 512 of the fixing plate 51 is provided with a countersunk screw coupling hole 514 to fix the fixing plate 51 itself to the upper plywood 11 of the primary insulating plate 1 on one side. It characterized in that it can be fixed through the countersunk screw (6).

Referring to the operation and effect of the device of the present invention configured as described above are as follows.

First, the insulating plate fixing device of the present invention is composed of the tongue (3) having a "b" shape, the tension spring (4) and the binding and fixing means (5) as the main technical components, if necessary, the binding And fixing the fixing plate 51 of the fixing means 5 to the upper plywood 11 of the primary heat insulating plate 1 through the countersunk screw 6 as an additional technical component.

At this time, the tongue (3) the spring engaging hole 31 is drilled in the upper center, and the bottom side is caught by the locking groove 22 formed in the upper plywood 21 of the secondary insulation plate (2) The piece 32 is bent so that a longitudinal cross section may have a "b" shape.

In addition, the tension spring 4 is coupled to the nut 52 is fitted into the threaded through-hole 511 drilled in the center of the fixing plate 51 of the fixing and fixing means 5 to the protrusion formed bent in the vertical direction at the upper end portion A screw thread 41 for nut coupling is provided, and a locking ring 42 which is fitted into the locking hole 31 of the tongue 3 is bent and integrally bent and fastened and fixed to the tongue 3. It is elastically fixed between the means 5.

In addition, the fastening and fixing means 5 is provided with a threaded portion through-hole 511 into which the upper nut coupling thread 41 of the tension spring 4 is fitted at the center thereof, and the primary heat insulating plate 1 adjacent to each other. Fixing plate 51 is coupled in the form of both ends to the engaging jaw (12) formed in the upper plywood 11 of the) and the nut 52 coupled to the nut coupling thread 41 of the tension spring (4) Consisting of two primary heat insulating plates 1 adjacent to each other to be fixed to the secondary heat insulating plate 2 through the tension spring 4 and the tongue (3).

At this time, the fixing plate 51 of the binding and fixing means 5 may be configured to have a square plate shape, but in this case, both ends of the fixing plate 51 are caught by the locking groove 51 of the primary insulation plate 1. The hook 32 of the bottom is caught by the upper spring catching hole 31 of the tongue 3 caught in the catching groove 22 formed at the bottom of the upper plywood 21 of the secondary insulation plate 2. When the upper end of the tension spring (4) is caught and fastened to the fixing plate 51 by using the nut 52, not only the fixing plate 51 can be rotated, but also the fixing plate 51 itself 1 There is a fear that adjacent primary insulation plates 1 may flow through their gaps by external impact by performing only a function of pressing the primary insulation plate 1 toward the secondary insulation plate 2 side.

" 형상을 갖도록 절곡 형성하여, 단차부(513)를 사이에 두고 양측으로 형성된 날개부(512)는 서로 인접한 1차 단열판(1)의 상부 합판(11)의 걸림턱(12)에 걸려지도록 하고, 중앙에서 하방부를 향해 절곡 형성된 단차부(513)는 상기 1차 단열판(1)의 상판 양측부 사이에 형성된 틈새(13)에 끼워져 걸려지도록 함으로써 인장 스프링(4)의 너트 결합용 나사산(41)에 너트(52)를 체결시켜 상기 결착 및 고정수단(5) 의 고정판(51)과 인장 스프링(4) 및 텅(3)을 통해 상기 1차 단열판(1)들을 2차 단열판(2)에 고정할 때 상기 1차 단열판(1) 및 결착 및 고정수단(5)의 고정판(51)의 위치를 정확하고 쉽게 확보된다.Therefore, in the present invention, the longitudinal section of the fixing plate 51 made of iron plate is "

"Bent to have a shape, so that the wing portions 512 formed on both sides with the stepped portion 513 interposed therebetween is caught by the locking jaw 12 of the upper plywood 11 of the primary insulation board 1 adjacent to each other. , The stepped portion 513 bent toward the lower portion from the center is sandwiched between the gaps 13 formed between both sides of the upper plate of the primary heat insulating plate 1 so that the threaded threads 41 for nut coupling of the tension spring 4 can be caught. The first heat insulating plate 1 to the second heat insulating plate 2 through the fixing plate 51, the tension spring 4, and the tongue 3 of the fastening and fixing means 5 by fastening the nut 52. When the position of the fixing plate 51 of the primary heat insulating plate 1 and the binding and fixing means 5 is accurately and easily secured.

" 형상을 갖도록 절곡 형성시켜 전술한 바와 같이 단차부(513)를 사이에 두고 양측으로 형성된 날개부(512)가 서로 인접한 1차 단열판(1)의 상부 합판(11)에 형성된 걸림턱(12)에 걸려지도록 하고, 중앙에서 하방부를 향해 절곡 형성된 단차부(513)가 상기 1차 단열판(1)의 상판 양측부 사이에 형성된 틈새(13)에 끼워져 걸려지도록 한 상태에서 단차부(513)의 나사산부 통과공(511)을 통해 끼워져 돌출된 인장 스프링(4)의 너트 결합용 나사산(41)부에 너트(52)를 체결하여 상기 결착 및 고정수단(5)의 고정판(51)과 인장 스프링(4) 및 텅(3)을 통해 상기 1차 단열판(1)들을 2차 단열판(2)에 고정되도록 할 경우 외부에서 충격이 가해져 인장 스프링(4)의 인장력이 변화되거나 1차 단열판(1)들이 상호 유동될 경우 상기 결착 및 고정수단(5)의 고정판(51)이 일부 유동될 우려가 있다.In addition, the longitudinal section of the fixing plate 51 of the binding and fixing means 5 as described above "

As described above, the locking projections 12 formed on the upper plywood 11 of the primary insulation board 1 adjacent to each other have the wing portions 512 formed on both sides with the stepped portions 513 interposed therebetween. Thread of the stepped portion 513 in such a state that the stepped portion 513 bent toward the lower portion from the center is fitted into the gap 13 formed between both sides of the upper plate of the primary heat insulating plate 1. The fixing plate 51 and the tension spring of the binding and fixing means 5 are fastened by fastening the nut 52 to the nut coupling thread 41 of the tension spring 4 which is inserted through the sub through hole 511 and protrudes. 4) and when the primary insulation plates 1 are fixed to the secondary insulation plates 2 through the tongues 3, an external shock is applied to change the tensile force of the tension spring 4 or the primary insulation plates 1 are removed. In the case of mutual flow, the fixing plate 51 of the binding and fixing means 5 may be partially flowed.

Therefore, in the present invention, by forming the countersunk screw coupling hole 514 on one side wing portion 512 of the fixing plate 51, the fixing plate 51 itself to the upper plywood 11 of the primary insulating plate 1 on one side. The fixing plate 51 of the fastening and fixing means 5 may be fixed through the countersunk screw 6 even when an external shock is applied to change the tensile force of the tension spring 4 or the primary insulation plates 1 flow. ) Is fixed to the upper plywood 11 of the primary heat insulating plate 1 of one side, so that the fixing plate 51 itself may be prevented from flowing due to external impact force and the like, thus causing a loss of locking operation. have.

That is, in the present invention, the elastic deformation amount is fixed to the primary and secondary insulation plates (1) and (2) by using the tension spring (4) larger than the tongue, bolt, hook-type bolt, etc., such as the LNG head pressure and thermal stress Even if the shrinkage deformation of the heat insulator occurs due to the action, the tensile force is maintained even when the tension spring 4 itself sufficiently absorbs the shrinkage strain, so that the state of engagement of the primary and secondary heat insulation plates 1 and 2 is maintained.

At this time, the protrusion formed bent in the vertical direction at the upper end of the tension spring (4) is fitted into the threaded through hole 511 drilled in the center of the fixing plate 51 of the binding and fixing means (5) is coupled with the nut 52 The nut coupling thread 41 is processed, and a threaded portion through-hole 511 is provided at the center of the fixing plate 51 so that the nut-coupled thread 41 is threaded through-hole 511 of the fixing plate 51. The nut 52 on the upper surface of the fixing plate 51 to the nut coupling thread 41 of the tension spring 4, and through the amount of rotation of the nut 52, By applying a tensile force, it is possible to easily fix the primary and secondary insulation plates (2).

Although the above-described embodiments have been described with respect to the most preferred embodiments of the present invention, it is not limited to the above embodiments, and it will be apparent to those skilled in the art that various modifications can be made without departing from the technical spirit of the present invention.

As described above, according to the insulating plate fixing device of the present invention, by using a spring with a large amount of elastic deformation compared to the tongue, bolt, hook-type bolt, etc. Maintaining the tightness of the primary and secondary insulation plates by maintaining the tensile force of the tension spring even if the shrinkage deformation of the insulation is sufficiently absorbed by the load action such as LNG head pressure and thermal stress. It is a very useful invention that can greatly improve the reliability of the product itself.

Claims (3)

In constructing the insulation board failure device for coupling the primary and secondary insulation plates installed with plywood on the upper and lower surfaces, respectively, A spring engaging hole is drilled in the upper center, and a latching portion that is fitted into the locking groove formed in the upper plywood of the secondary insulation plate is bent and formed with a longitudinal cross section having a “b” shape as a whole; A tension spring having a nut coupling screw thread at an upper portion thereof and a hook ring formed at a lower portion of the tongue by a catching hole, the elastic spring being elastically fixed between the tongue and the binding and fixing means; A fixing plate having a threaded portion through-hole in the center and coupled to the engaging jaw formed in the upper plywood of the primary insulation board adjacent to each other in such a manner that both ends thereof are caught, and a nut coupled to the nut coupling thread of the tension spring; Insulating plate fixing device of the LNG carrier cargo hold, characterized in that consisting of; binding and fixing means for fixing two primary insulation plates adjacent to each other to the secondary insulation plate through the tension spring and the tongue. The method according to claim 1, The fixing plate of the binding and fixing means has a longitudinal section "

"Bending the steel plate to have a shape, so that both wing parts are caught by the locking jaws formed on the upper plywood of the primary insulation board adjacent to each other, and the stepped portions bent toward the lower portion are fitted into the gap between the upper plywood of the primary insulation board adjacent to each other. Insulating plate fixing device of the LNG carrier cargo hold, characterized in that it is built. The method according to claim 2, Insulating plate fixing device of the LNG carrier cargo hold, characterized in that the blade head screw holes formed on one side of the fixed plate to fix the fixing plate itself to the upper plywood of the one side primary heat insulating plate through the plate head screw.

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