KR101410285B1 - Forming machine of membrane for LNG storage tank with unilateral direction Pressure roller - Google Patents

Abstract

 The present invention relates to an apparatus for forming a corrugation in a membrane for a liquefied natural gas storage tank,

The main body 100 and the main body 100 are provided with a press slide connection part 140, an upper mold 110, a pressure roller bundle 120, a lower mold 130, a base plate 101 and a buffer mechanism 150 1. A membrane molding apparatus for a liquefied natural gas storage tank, comprising: a pressure roller in one direction;

And an upper mold (110) having a convex portion (111) of a cross section of the membrane corrugations (11, 21) formed at a lower end thereof in a structure capable of reciprocating up and down in the press slide connection portion 110);

The upper mold is connected to the press slide connection part 140 by the buffer mechanism 150 and the upper part is rotated in one direction only A pressure roller bundle 120 on which the rollers 121 are mounted;

And is configured to slide horizontally on the upper portion of the base plate 101. The concave portion 131 having a sectional shape of the corrugation 11 is divided into halves on the upper flat surface to be symmetrical A lower mold 130 formed;

And a pressure roller for supplying the liquid to the liquefied natural gas storage tank.

The membrane molding apparatus for a liquefied natural gas storage tank having a pressure roller in one direction according to the present invention has the corrugations 11 and 21 having a section of a curved waveform in a membrane used in a cryogenic liquid storage tank, It is possible to remarkably simplify the conventional known apparatus and to prevent the occurrence of defective products by attenuating the mechanical frictional resistance applied to the surface of the disk membrane to improve the productivity.

Membrane, corrugation, unidirectional pressure roller, liquefied natural gas, lower mold, upper mold

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a membrane forming apparatus for a liquefied natural gas storage tank having a unidirectional pressure roller,

1 is a perspective view showing a configuration of the present invention;

1A is a perspective view showing a kind of a membrane proposed by the present applicant in the industry

1B shows a membrane perspective view of " TECHNIGAZ "

2A is an explanatory view of assembling the upper and lower molds and the one-

Fig. 2B is an explanatory view of assembling the upper and lower molds and the one-

FIG. 3A is a diagram showing a coupling relationship between the upper mold and the one-

3B is a detailed view of part A of Fig. 3A

3C is a perspective view showing a lower portion of the one-direction pressure roller bundle;

Fig. 4A is an explanatory diagram of applying a cross section of the corrugation 12 of Fig. 1A to the one-

Fig. 4B is an explanatory diagram of applying a cross section of the corrugation 12 of Fig. 1A to the upper surface of the lower mold;

FIG. 5 is a conceptual diagram in 3D in which the concept of FIGS. 4A and 4B is applied.

6A to 6C are cross-sectional views showing a known membrane collagation forming process

A set of conceptual diagrams

Figs. 7A to 7C illustrate the present invention, in which liquefied natural gas

A set of conceptual diagrams showing the process of forming a corrugation with a membrane forming device for a storage tank

Description of the Related Art [0002]

 10; Membrane 12; Corrugation

 110; Phase mold 120; A pressure roller bundle 130; Lower mold 150; Buffering mechanism

The present invention relates to a molding apparatus for a membrane, which is provided on the inner wall of a tank storing a cryogenic liquid, and which is in direct contact with a liquid at a cryogenic temperature and a gas.

As an example of a cryogenic liquid, liquefied natural gas can be stored in a liquid state in a storage tank with a sufficient heat insulating layer, liquefied at -161.5 ° C. Here, the heat insulating layer is made of a foam insulating material and a membrane for hermetic sealing. The membrane is made of a metal material which is resistant to low temperatures and is made of a corrosion resistant metal. The temperature of the cryogenic liquid, such as liquefied natural gas, The known membranes have corrugations of approximately 50 mm to 100 mm in height in the area of approximately 1000 mm x 3000 mm in longitudinal and transverse directions And has a metal panel shape formed by crossing at a pitch of approximately 300 mm to 400 mm.

As is known, the production of storage tanks for liquefied natural gas storage facilities and marine transportation means, which are large-scale facilities, requires a large number of membranes, and the efficiency of the apparatus in the membrane production process has a great influence on the productivity of the industry .

However, a technology in which most of related technologies tend to be treated as confidential in the industry (a concept shown in Fig. 6A to Fig. 6C) is also a weak state and various technical proposals are required.

The present invention proposes a membrane forming apparatus for a liquefied natural gas storage tank with a unidirectional pressure roller for forming corrugations (11, 21) having a cross section of a curved corrugation in the membrane of a cryogenic liquid storage tank.

In order to realize the above-described problem, first, the present invention will be explained with reference to the attached drawings. Fig. 1 is a perspective view showing the construction of the present invention. Fig. 1a is a perspective view showing a kind of membrane proposed by the present applicant in the industry, Fig. 1b is a perspective view of a known " TECHNIGAZ " FIGS. 7A to 7C are a series of conceptual diagrams showing a process of forming a corrugation by a membrane forming apparatus for a liquefied natural gas storage tank having a unidirectional pressure roller according to the present invention .

According to the configuration of Fig. 1, the present invention provides a membrane molding apparatus for a liquefied natural gas storage tank having a pressure roller in one direction, comprising:

 The main body 100 is provided with a press slide connection part 140, an upper mold 110, a pressure roller bundle 120, a lower mold 130, a base plate, and a buffer mechanism 150.

The upper mold 110 is slidably connected to the upper press slide connection portion 140 and a convex portion 111 having a sectional shape of the corrugations 11 and 21 is formed at a lower end thereof .

The pressure roller bundle 120 is coupled to both sides of the upper die 110 and is connected to the press slide connection part 140 by an impact buffer 150, And a roller that rotates only with the roller.

The lower mold 130 is divided into two parts and is configured to slide on an upper part of a base plate 101. A concave part of a corrugated shape in cross section is formed on the upper flat surface 131 are halved and formed in each of them.

2A and 2B, the pressure roller bundle 120 is coupled to the side surface of the upper die 110 in such a manner as to slide up and down, and the upper and lower stages are constrained by the dog 112 and the dog hook 123a do.

In addition, the convex portion 111 of the upper mold 110 and the concave portion 131 of the lower mold 130 are in a converging relationship that can eventually be occluded in an operating state.

3A, 3B, and 3C, which show distinctive features of the present invention from the known art, the pressure roller bundle 120 includes a body 123 and a roller 123 that rotates only in one direction, And a unidirectional bearing clutch 122 provided at both ends of the roller so that when the roller 121 rotating in one direction tangentially contacts the membrane 10, It shows the permissive structure.

The shock absorber 150 functions to bind the pressure roller bundle 120 to the press slide connection portion 140 and to apply a predetermined preload to the tip of the roller 121 rotating in only one direction. And the spring 152 interact with each other to provide a predetermined pressure and elasticity. Here, the cylinder 151 can be used in accordance with the field conditions such as hydraulic pressure, air pressure, and gas spring.

Here, with reference to Figs. 6A to 6C and Figs. 7A to 7C, a description will be given of differences between the existing known technology and the present invention, and a membrane molding apparatus for a liquefied natural gas storage tank provided with a unidirectional pressure roller.

A known conventional corrugation molding process will be described below in accordance with the concept shown in Figs. 6A to 6C.

A known membrane collation molding apparatus includes an upper mold 210, an upper mold side block 220 and a lower mold 230 in a main body 200.

 The upper die 210 has a convex portion 211 having a cross-sectional shape of the corrugation at its lower end, and an upper mold side block 220 is connected to both sides.

The upper mold side block 220 has a flat surface formed on the lower surface thereof and is coupled to the upper mold 210 through an operating mechanism (not shown).

The upper mold 210 and the upper mold side block 220 are in the state of FIG. 6A in the job preparation unit, in FIG. 6B in the processing of the corrugation 11, and in FIG. Therefore, the upper mold 210 and the upper mold side block 220 are required to have independent driving means (not shown) necessary for the upper, lower, left, and right driving operations.

The lower mold 230 is divided into two parts. The lower mold 230 is separated into the state shown in FIG. 6A in the job preparation machine, and is joined to the state shown in FIG. 6B during corrugation. At this time, The concave portion 231 having a corrugated cross-sectional shape is halved on the upper flat surface so that the concave portion 231 is formed. When returning, the state shown in Fig. 6C is achieved. In order to form the corrugation 11 on the membrane of the two lower molds 230 according to the concept shown in the figure, independent driving means (not shown) must be provided since the horizontal movement should be symmetrical to the left and right.

In addition, separate transfer means (not shown) for inputting and outputting the disk 10 of the membrane 10 should be provided.

A process of fabricating the corrugation 11 of the membrane 10 with the membrane corrugation molding apparatus according to the above configuration will be described.

In the state of FIG. 6A, the original plate of the membrane 10 is inserted into the interior of the main body by the conveying means (not shown) and is mounted at a predetermined position.

The upper mold 210 and the lower mold 230 are symmetrical and centered and the upper mold 210 and the lower mold 230 are meshed with each other to form a membrane 10) A corrugation 11 is formed on the original plate.

Here, the upper mold side block 220 is downwardly diagonal,

So that it is pressed tightly to the center portion.

When the corrugation 11 is formed on the original plate of the membrane 10 by the above process, the process returns to the state of FIG. 6A through the process of FIG. 6C.

 The transfer means (not shown) moves the membrane 10, from which the corrugation 11 has been formed, to a predetermined position.

The above process is repeated to form a corrugation 11 at a predetermined pitch on the disk 10 of the membrane.

7A to 7C, a membrane molding apparatus for a liquefied natural gas storage tank provided with a unidirectional pressure roller will be described.

The main body 100 is provided with a press slide connection part 140, an upper mold 110, a pressure roller bundle 120, a lower mold 130, a base plate, and a buffer mechanism 150.

 The upper die 110 is connected to the press slide connection part 140 located at the upper side by a slidable structure and the convex part 111 of the cross section of the corrugations 11 and 21 is formed at the lower end .

The pressure roller bundle 120 is coupled to both sides of the upper die 110 and is connected to the press slide connection part 140 by an impact buffer 150, The rotation direction of the rollers 121, which rotate only in one direction, is set on the right and left sides of the upper die 110 in the opposite directions. In other words, it is a setting that allows only material transfer to the center part.

The upper die 110 and the pressure roller bundle 120 are in the state of FIG. 7A in the job preparation period, in FIG. 7B in the processing of the corrugation 11, and in FIG. Therefore, the upper mold 110 and the pressure roller bundle 120 must have independent driving means (not shown) necessary for the up-and-down driving operation.

The lower mold 130 is separated into two parts and is configured to be slid on an upper portion of the base plate 101. The lower mold 130 is separated into the state of FIG. 7B. At this time, the concave portion 131 of the corrugated cross-sectional shape is divided into halves on the upper flat surface so that the concave portion 131 of the corrugated cross-sectional shape is formed on the upper flat surface . Upon returning, the state shown in Fig. 7C is achieved. In order to form the corrugation 11 on the two lower molds 130 in accordance with the concept as shown in the figure, independent driving means (not shown) must be provided since the horizontal movement should be symmetrical to the left and right.

In addition, separate transfer means (not shown) for inputting and outputting the disk 10 of the membrane 10 should be provided.

A process of manufacturing the corrugation 11 of the membrane 10 with the membrane molding apparatus for a liquefied natural gas storage tank having the one-direction pressure roller according to the above construction will be described.

In the state of FIG. 7A, the original plate of the membrane 10 is inserted into the main body of the main body by the transfer means (not shown) and is mounted at a predetermined position.

The upper mold 110 and the lower mold 130 are symmetrically moved to the center and the upper mold 110 and the lower mold 230 are meshed with each other to form a membrane 10) A corrugation 11 is formed on the original plate.

Here, the pressure roller bundle 120 provided on both sides of the upper mold 110 is symmetric with respect to the upper mold 110 and the lower mold 130, The roller 121 rotating in one direction is brought into contact with the original plate of the membrane 10 under a predetermined pressure. The convex portion 111 of the upper mold 110 forms the original plate of the membrane 10 and the material is bent and moved to the center and the roller 121 rotating in only one direction is rotated counterclockwise So as to induce the disk 10 to be bent toward the central portion but to prevent the outward backward movement of the membrane 10 due to elasticity. This is because the pressure roller bundle 120 rises at an offset of the dog 112 and the dog hook 123a when the upper mold 110 and the lower mold 230 are engaged with each other, , Which has the effect of canceling the repulsive force of the material of the membrane 10.

When the corrugation 11 is formed on the original plate of the membrane 10 by the above process, the process returns to the state of FIG. 7A through the process of FIG. 7C.

 The transfer means (not shown) moves the membrane 10, from which the corrugation 11 has been formed, to a predetermined position.

The above process is repeated to form a corrugation 11 at a predetermined pitch on the disk 10 of the membrane.

The arrangement of the upper mold 210 and the lower mold 230 and the external transfer of the material may be well known in the art. An important proposal of the present invention is the correlation between the offsets of the dog clutches 123a and the dogs 112 of the pressure roller assembly 120, the shock absorber 150 and the upper mold 110.

4A, 4B and 5 show a case in which the idea of the present invention is applied by treating the original plate of the membrane 10 having the already formed corrugations 12 and 22 at a predetermined pitch, And a cross section of the corrugations 12 and 22 is formed on the upper flat surface of the lower mold 130c in correspondence with the roller 121c. The size of the roller 121c is limited depending on the height of the corrugations 12 and 22.

The present invention improves the complicated and structurally unstable link portion by replacing the mold side block 220, which is an auxiliary component of the upper mold 210, with the pressure roller bundle 120 in a known conventional membrane corrugation forming apparatus, It is possible to provide a membrane for a liquefied natural gas storage tank in which a more elaborate corrugation is formed by eliminating excessive friction applied to the liquefied natural gas storage tank.

Claims (8)

A press slide connection portion 140, an upper mold 110, a pressure roller bundle 120, and a lower mold 130 (not shown) are formed in the main body 100 to form a corrugation in the membrane for the liquefied natural gas storage tank. , A base plate (101), and a buffer mechanism (150), the membrane forming apparatus for a liquefied natural gas storage tank having a pressure roller in one direction; And an upper mold (110) having a convex portion (111) of a cross section of the membrane corrugations (11, 21) formed at a lower end thereof in a structure capable of reciprocating up and down in the press slide connection portion 110); The upper mold is connected to the press slide connection part 140 by the buffer mechanism 150 and the upper part is rotated in one direction only A pressure roller bundle 120 on which the rollers 121 are mounted; And is configured to slide horizontally on the upper portion of the base plate 101. The concave portion 131 having a sectional shape of the corrugation 11 is divided into halves on the upper flat surface to be symmetrical A lower mold 130 formed; And a pressure roller for supplying the liquid to the liquefied natural gas storage tank. The pressure roller assembly according to claim 1, characterized in that the pressure roller bundle (120) is constituted by a body (123), a roller (21) built into the body, and a unidirectional bearing clutch Membrane forming apparatus for liquefied natural gas storage tanks with pressure rollers. The pressure roller assembly according to claim 2, wherein the pressure roller bundle (120) includes a pair of upper and lower grooves (123a, 122b) Characterized in that the pressure regulating member is constrained by a first pressure roller. 3. The membrane molding apparatus for a liquefied natural gas storage tank according to claim 2, wherein the pressure roller bundle (120) receives a predetermined sustained pressure from the buffer mechanism (150). 3. The method as claimed in claim 2, wherein the roller (121) rotating in only one direction is rotated only in one direction by the one-way bearing clutch (122) Membrane forming device for storage tanks. 5. The membrane molding apparatus for a liquefied natural gas storage tank according to claim 4, wherein the buffer mechanism (150) comprises a combination of a cylinder motion mechanism (151) and a spring (152). The roller (121) according to claim 2, wherein the roller (121) which rotates only in one direction can form a projection having a cross-sectional shape of corrugation (12, 22) on the circumference of the roller (121c) Wherein the membrane forming apparatus comprises: The liquefied natural gas storage tank according to claim 1, wherein the lower metal mold (130) is capable of forming a projection having a cross-sectional shape in corrugation (12, 22) Membrane forming apparatus.

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