Liquefied natural gas heat preservation storage device and using method

Abstract

The invention relates to the technical field of liquefied natural gas heat preservation storage, and discloses a liquefied natural gas heat preservation storage device which comprises a tank body and a tank cover, a feeding pipe communicated with an inner cavity of the tank body is arranged on the tank cover, and the liquefied natural gas heat preservation storage device is characterized in that an opening and closing piece used for closing or opening the feeding pipe is arranged in the feeding pipe; a feeding pipe is arranged in the tank body, the lower end of the feeding pipe is provided with an extending cylinder extending into the tank body, a liquid inlet cavity is formed in the extending cylinder and communicated with the feeding pipe, the side wall of the extending cylinder is provided with an open hole, two sealing strips are arranged in the extending cylinder in a sliding mode, and the opening and closing piece is in linkage with the sealing strips. The liquefied natural gas filling stability can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of liquefied natural gas thermal insulation storage, and in particular to a liquefied natural gas thermal insulation storage device and a use method thereof. Background Art

[0002] Liquefied natural gas is very easy to vaporize at room temperature and pressure, so it needs to be stored in a low temperature and normal pressure environment. Insulated storage can not only reduce the evaporation loss of liquefied natural gas, but also ensure its stability and avoid safety hazards.

[0003] The existing Chinese invention patent document with application number 202010452988.0 discloses a liquefied natural gas insulation storage device, including a liquid storage tank and a first tank cover. The first tank cover is provided with a feed pipe, and the liquefied natural gas is fed into the inner tank of the liquid storage tank through the feed pipe.

[0004] During filling, when the liquefied natural gas is fed into the liquid storage tank through the feed pipe, the distance between the feed pipe and the internal liquid surface is relatively large, which makes the liquefied natural gas vaporization phenomenon during filling more serious. Summary of the invention

[0005] In a first aspect, the present application provides a liquefied natural gas thermal insulation storage device.

[0006] This application adopts the following technical solutions: A liquefied natural gas heat-insulating storage device comprises a tank body and a tank cover, wherein the tank cover is provided with a feed pipe connected to the inner cavity of the tank body, the feed pipe is provided with an opening and closing piece for closing or opening the feed pipe, and the lower end of the feed pipe is provided with an extension cylinder extending into the tank body, the extension cylinder is provided with a liquid inlet cavity, and the liquid inlet cavity and the feed pipe are communicated with, the side wall of the extension cylinder is provided with an opening, and two closing strips are slidably provided in the extension cylinder, and the opening and closing piece and the closing strip are linked to each other, when filling, the opening and closing piece releases the sealing effect on the feed pipe, and the opening and closing piece drives the two closing strips to move away from each other, and the space between the two closing strips is communicated with the opening and the feed pipe; when filling is completed, the opening and closing piece closes the feed pipe, and the two closing strips approach each other until they abut against each other and cover the opening.

[0007] By adopting the above technical solution, during filling, the opening and closing part opens the feed pipe, so that the liquid can enter the tank body through the feed pipe, and during filling, the liquid enters the liquid inlet cavity of the extension tube, and the liquid then flows into the tank body through the opening, thereby reducing the situation where the liquid forms violent flow and collision. During filling, the closing strips are close to each other and cover the opening, so that the liquid is not easy to flow into the liquid inlet cavity. During the next filling, the closing strips are separated from each other, so that the remaining part of the liquid in the tank body can flow into the liquid inlet cavity through the opening first. Therefore, when filling new liquefied natural gas, the original liquid can be disturbed first, reducing the vortex phenomenon during subsequent filling.

[0008] Optionally, a ring edge is provided on the inner wall of the feed pipe, and the opening and closing member includes a through pipe vertically arranged on the ring edge, a sliding seat slidably arranged in the feed pipe, and an extrusion member arranged between the lower surface of the sliding seat and the upper surface of the ring edge; the upper end of the through pipe is a closed structure and a through hole is provided on the side wall of the upper end of the through pipe, and the through pipe is slidably inserted in the sliding seat, and when the sliding seat slides downward, the extrusion member is compressed, and the through hole can be exposed from the upper end of the sliding seat.

[0009] By adopting the above technical solution, the filled pipe abuts against the sliding seat, and the sliding seat is driven to move downward, so that the through hole is exposed, so that the liquid can flow into the through pipe through the through hole.

[0010] Optionally, a stepped edge is provided on the upper side wall of the through pipe, and the extrusion member drives the sliding seat to move upward, and the sliding seat surface and the stepped edge are tightly pressed against each other.

[0011] By adopting the above technical solution, the sealing performance between the sliding seat and the through pipe is improved.

[0012] Optionally, a linkage is provided between the closing strip and the sliding seat, and when the sliding seat moves downward, the two closing strips move away from each other so that there is a space between the two closing strips; when the sliding seat moves upward, the two closing strips move closer to each other and abut against each other.

[0013] By adopting the above technical solution, the movement of the sliding seat can drive the movement of the closing strip through the linkage member.

[0014] Optionally, a sliding bar is provided on the side of the closing strips facing away from each other, a sliding groove is provided on the inner wall of the liquid inlet cavity for the sliding bar to slide and insert, and an elastic member is provided between the sliding groove and the sliding bar, and when the two closing strips are abutted against each other, the elastic member is in a stretched state.

[0015] By adopting the above technical solution, the closing strip slides on the inner wall of the liquid inlet cavity through the sliding strip, so that the closing strip is not likely to slide.

[0016] Optionally, the linkage member includes a first linkage block which is slidably arranged on the inner wall of the liquid inlet chamber up and down, a second linkage block is arranged on the closing strip, the first linkage block is arranged with a first inclined surface, the second linkage block is arranged with a second inclined surface, and the first inclined surface and the second inclined surface are abutted against each other, and a reset member is arranged on the inner wall of the liquid inlet chamber, when the sliding seat moves downward, the first linkage block moves downward, the reset member is compressed, and the elastic member drives the closing strip to slide in a direction away from each other; when the sliding seat slides upward, the reset member drives the first linkage block to move upward, thereby pushing the closing strips closer to each other, and the elastic member is in a stretched state.

[0017] By adopting the above technical solution, the movement of the closing strip and the sliding seat are linked together through the cooperation of the first linkage block and the second linkage block, and the reset member and the elastic member.

[0018] Optionally, an installation groove is provided on the inner wall of the liquid inlet chamber, the first linkage block is slidably installed in the installation groove, the reset member is installed between the lower end of the first linkage block and the inner bottom surface of the installation groove, and the lower surface of the sliding seat is provided with a push rod extending downward and connected to the first linkage block.

[0019] By adopting the above technical solution, the first linkage block slides in the installation groove and is connected to the sliding seat through the push rod, so that the sliding of the first linkage block is more stable.

[0020] Optionally, the extrusion member, the elastic member and the reset member are all springs.

[0021] In a second aspect, the present application provides a method for using a liquefied natural gas insulation storage device.

[0022] A method for using a liquefied natural gas heat preservation storage device, using the above storage device, comprising the following steps: (1) when filling, inserting a filling tube into a feed tube, the end of the filling tube abuts against the upper surface of a sliding seat, and driving the sliding seat to move downward, so that a through hole is exposed, and liquid enters the through tube through the through hole, then enters the extension tube, and enters the tank body through the opening; (2) after filling is completed, the filling tube is pulled out, and the sliding seat is reset under the action of an extruder and covers the through hole.

[0023] In summary, the present application includes at least one of the following beneficial effects: 1. During filling, the liquid passes through the liquid inlet cavity before entering the tank body, which reduces the excessive flow of the liquid. During filling, the remaining liquid in the tank body first flows into the liquid inlet cavity through the opening, which can disturb the liquid and reduce the occurrence of vortex phenomenon; 2. The first linkage block cooperates with the second linkage block, and the reset member and the elastic member on the frame act to link the movement of the closing strip with the sliding of the sliding seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application; Figure 2 is a cross-sectional schematic diagram of an embodiment of the present application; Figure 3 is a cross-sectional schematic diagram of a feed pipe in an embodiment of the present application; Figure 4 yes Figure 3 The enlarged schematic diagram of point A in the middle; Figure 5 is a cross-sectional schematic diagram of the extension tube in the embodiment of the present application; Figure 6 yes Figure 3 A magnified schematic diagram of point B in the middle.

[0025] Explanation of the accompanying drawings: 1. tank body; 2. tank cover; 3. feed pipe; 4. opening and closing member; 41. through pipe; 42. sliding seat; 43. extrusion member; 5. extension cylinder; 6. liquid inlet chamber; 7. opening; 8. closing strip; 9. ring edge; 10. through hole; 11. step edge; 12. linkage member; 121. first linkage block; 122. second linkage block; 123. reset member; 13. sliding strip; 14. slide groove; 15. elastic member; 16. first inclined surface; 17. second inclined surface; 18. mounting groove; 19. push rod; 20. guide rod. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-6 This application is described in further detail.

[0027] Example 1 The present application embodiment discloses a liquefied natural gas heat preservation storage device. Figure 1 and Figure 2 The storage device comprises a tank body 1 and a tank cover 2, and the tank cover 2 is covered on the tank body 1. The side wall of the tank body 1 is a hollow layer, which is used to set a heat exchange plate and other heat preservation devices. This is a prior art and is not the focus of this application, so it will not be described in detail here.

[0028] Reference Figure 2 and Figure 3 A feed pipe 3 is installed on the tank cover 2. The feed pipe 3 runs through both sides of the tank cover 2, and an opening and closing member 4 is installed inside the feed pipe 3. The opening and closing member 4 is used to control the opening or closing of the feed pipe 3. When filling, the filling pipe is inserted into the feed pipe 3, and the opening and closing member 4 is opened, so that liquid can be filled. When the filling pipe is pulled out, the opening and closing member 4 closes the feed pipe 3.

[0029] Reference Figure 3 and Figure 4 , the inner wall of the feed pipe 3 is provided with a ring edge 9, and the opening and closing member 4 includes a through pipe 41 coaxially fixed to the ring edge 9, a sliding seat 42 slidably arranged in the feed pipe 3, and an extrusion member 43 installed between the lower end of the sliding seat 42 and the upper end of the ring edge 9. The through pipe 41 slides through the sliding seat 42, and the upper end of the through pipe 41 is a closed structure. The upper end side wall of the through pipe 41 is spaced apart with a plurality of through holes 10, and the extrusion member 43 is preferably a spring. When the extrusion member 43 is in a natural state, the through hole 10 is located in the inner cavity of the sliding seat 42. The filling tube is inserted into the feed pipe 3, and abuts against the upper end of the sliding seat 42, and drives the sliding seat 42 to move downward, and the through hole 10 is exposed from the upper surface of the sliding seat 42, so that the liquid can flow into the through pipe 41 through the through hole 10 and enter the tank body 1.

[0030] Furthermore, in order to improve the sealing between the sliding seat 42 and the through pipe 41, a step edge 11 is provided at the upper end of the through pipe 41, and the extrusion member 43 drives the sliding seat 42 to move upward, and makes the step edge 11 and the sliding seat 42 tightly abut against each other. A step groove for accommodating the step edge 11 can be provided on the sliding seat 42, and a sealing ring can be bonded to the side wall of the step edge 11 to further improve the sealing effect.

[0031] Reference Figure 2 and Figure 3 , the lower end of the feed pipe 3 is fixedly connected with an extension tube 5, and the extension tube 5 extends into the inner cavity of the tank body 1. The feed pipe 3 is a cylindrical structure, and the extension tube 5 is a quadrangular prism structure, and a liquid inlet cavity 6 is provided in the extension tube 5, and the liquid inlet cavity 6 is connected with the feed pipe 3, that is, the liquid in the through tube 41 can flow into the liquid inlet cavity 6. Openings 7 are provided on the inner walls on both sides of the liquid inlet cavity 6, and a plurality of openings 7 are arranged at intervals in the vertical direction. During filling, the liquid enters the liquid inlet cavity 6 and then flows into the tank body 1 through the openings 7. Therefore, the filling is carried out in a small space in the liquid inlet cavity 6 to reduce the generation of liquid turbulence.

[0032] Reference Figure 3 and Figure 5Two closing strips 8 are symmetrically and slidably installed on the inner wall of the liquid inlet cavity 6. The two closing strips 8 are close to each other or away from each other, and the inner wall where the closing strips 8 are installed is staggered with the inner wall where the opening 7 is opened. When the two closing strips 8 are close to each other and abut against each other, the closing strips 8 can cover the opening 7. A linkage 12 is installed between the closing strip 8 and the sliding seat 42. When the sliding seat 42 moves downward to be in an open state, the two closing strips 8 are away from each other, so that the opening 7 and the liquid inlet cavity 6 are connected. After the two closing strips 8 are away from each other, the remaining liquid in the tank body 1 can flow into the liquid inlet cavity 6 through the opening 7, so that the liquid in the tank body 1 flows before filling, reducing the occurrence of vortex phenomenon during subsequent filling. After the sliding seat 42 is reset, the closing strips 8 are close to each other and abut against each other, thereby closing the opening 7. The side walls of the closing strips 8 abut against the inner wall of the liquid inlet cavity 6, and when the closing strips 8 abut against each other, they can close the lower end opening of the through pipe 41.

[0033] A sliding bar 13 is fixed on the side of the closing strips 8 that are away from each other. Four sliding bars 13 are fixed and are respectively located at the four corners of the closing strips 8. A sliding groove 14 is provided on the inner wall of the liquid inlet chamber 6. The sliding groove 14 corresponds to the sliding bar 13 one by one. The sliding bar 13 is slidably inserted into the sliding groove 14. An elastic member 15 is installed in the sliding groove 14. The elastic member 15 is preferably a spring, one end of which is connected to the inner end surface of the sliding groove 14 and the other end is connected to the end of the sliding bar 13. When the closing strips 8 abut against each other, the elastic member 15 is in a stretched state, which has provided a force for the closing strips 8 to move away from each other.

[0034] Reference Figure 5 and Figure 6 The linkage member 12 includes a first linkage block 121 that slides up and down on the inner wall of the liquid inlet chamber 6, and a second linkage block 122 that is fixed on the side wall of the closing strip 8. The first linkage block 121 is provided with a first inclined surface 16, and the first inclined surface 16 is inclined from top to bottom in the direction close to the closing strip 8. The second linkage block 122 is provided with a second inclined surface 17, and the first inclined surface 16 and the second inclined surface 17 are mutually abutted. The linkage member 12 also includes a reset member 123 disposed in the inner wall of the liquid inlet chamber 6. When the sliding seat 42 moves downward, the first linkage block 121 moves downward, the reset member 123 is compressed, and the elastic member 15 drives the closing strip 8 to slide in the direction close to the first linkage block 121, that is, the two closing strips 8 move away from each other. When the sliding seat 42 moves upward, the reset member 123 drives the first linkage block 121 to move upward, and pushes the closing strip 8 to slide through the second linkage block 122, and overcomes the elastic force of the elastic member 15, so that the elastic member 15 is in a stretched state, and the closing strips 8 are mutually abutted.

[0035] The inner wall of the liquid inlet chamber 6 is provided with a mounting groove 18, and the first linkage block 121 is slidably mounted in the mounting groove 18. The reset member 123 is a spring, and one end is connected to the lower surface of the first linkage block 121, and the other end is connected to the inner bottom surface of the mounting groove 18. When the first linkage block 121 moves downward, the reset member 123 is compressed, and the force for the first linkage block 121 to move upward is provided. In order to reduce the distortion of the reset member 123, a guide rod 20 can be fixed in the mounting groove 18, and the spring is sleeved on the outer wall of the guide rod 20, and the upper end of the guide rod 20 and the lower end of the first linkage block 121 have a certain distance. The lower end surface of the sliding seat 42 is fixed with a push rod 19 extending downward, and the push rod 19 passes through the ring edge 9 and the side wall of the extension tube 5, and is connected to the first linkage block 121, thereby connecting the first linkage block 121 and the sliding seat 42.

[0036] The implementation principle of a liquefied natural gas insulation storage device in an embodiment of the present application is: the filling pipe is inserted into the feed pipe 3, and downward force is applied to make the sliding seat 42 move downward, and the two closing strips 8 move away from each other, so that liquid can be filled; after the filling is completed, the filling pipe can be pulled out, and the sliding seat 42 is reset to re-close the feed pipe 3.

[0037] Example 2 The present embodiment discloses a method for using the liquefied natural gas insulation storage device in Embodiment 1, comprising the following steps: (1) when filling, insert the filling tube into the feed tube 3, the end of the filling tube abuts against the upper surface of the sliding seat 42, and drives the sliding seat 42 to move downward, so that the through hole 10 is exposed, and the liquid enters the through tube 41 through the through hole 10, then enters the extension tube 5, and enters the tank body 1 through the opening 7; (2) after filling, pull out the filling tube, and under the action of the extruder 43, the sliding seat 42 is reset and covers the through hole 10.

[0038] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A liquefied natural gas heat preservation storage device, comprising a tank body (1) and a tank cover (2), wherein the tank cover (2) is provided with a feed pipe (3) communicating with the inner cavity of the tank body (1), characterized in that: The feed pipe (3) is provided with an opening and closing member (4) for closing or opening the feed pipe (3), and the lower end of the feed pipe (3) is provided with an extension tube (5) extending into the tank body (1), the extension tube (5) is provided with a liquid inlet cavity (6), and the liquid inlet cavity (6) is communicated with the feed pipe (3), the side wall of the extension tube (5) is provided with an opening (7), and two closing strips (8) are slidably provided in the extension tube (5), and the opening and closing member (4) is provided with an opening (7) for closing or opening the feed pipe (3). The opening and closing member (4) is linked to the sealing strip (8). When filling is in progress, the opening and closing member (4) releases the sealing effect on the feeding pipe (3), and the opening and closing member (4) drives the two sealing strips (8) to move away from each other, so that the space between the two sealing strips (8) is connected to the opening (7) and the feeding pipe (3). When filling is completed, the opening and closing member (4) closes the feeding pipe (3), and the two sealing strips (8) move closer to each other until they abut against each other and cover the opening (7).

2. A liquefied natural gas heat preservation storage device according to claim 1, characterized in that: The inner wall of the feed pipe (3) is provided with a ring edge (9), and the opening and closing member (4) comprises a through pipe (41) vertically arranged on the ring edge (9), a sliding seat (42) slidably arranged in the feed pipe (3), and an extrusion member (43) arranged between the lower surface of the sliding seat (42) and the upper surface of the ring edge (9); the upper end of the through pipe (41) is a closed structure and a through hole (10) is opened on the side wall of the upper end of the through pipe (41), and the through pipe (41) is slidably inserted into the sliding seat (42). When the sliding seat (42) slides downward, the extrusion member (43) is compressed, and the through hole (10) can be exposed from the upper end of the sliding seat (42).

3. A liquefied natural gas heat preservation storage device according to claim 2, characterized in that: The upper side wall of the through pipe (41) is provided with a stepped edge (11), the extrusion member (43) drives the sliding seat (42) to move upward, and the surface of the sliding seat (42) and the stepped edge (11) are tightly abutted against each other.

4. A liquefied natural gas heat preservation storage device according to claim 2, characterized in that: A linkage member (12) is provided between the closing strip (8) and the sliding seat (42); when the sliding seat (42) moves downward, the two closing strips (8) move away from each other so that there is a space between the two closing strips (8); when the sliding seat (42) moves upward, the two closing strips (8) move closer to each other and abut against each other.

5. A liquefied natural gas heat preservation storage device according to claim 4, characterized in that: A sliding strip (13) is provided on the side of the closing strips (8) facing away from each other, a sliding groove (14) for the sliding strip (13) to be slidably inserted is provided on the inner wall of the liquid inlet cavity (6), and an elastic member (15) is provided between the sliding groove (14) and the sliding strip (13), and when the two closing strips (8) are in contact with each other, the elastic member (15) is in a stretched state.

6. A liquefied natural gas heat preservation storage device according to claim 5, characterized in that: The linkage member (12) comprises a first linkage block (121) which is slidably arranged on the inner wall of the liquid inlet chamber (6) up and down, and a second linkage block (122) is arranged on the closing strip (8). The first linkage block (121) is provided with a first inclined surface (16), and the second linkage block (122) is provided with a second inclined surface (17), and the first inclined surface (16) and the second inclined surface (17) are in contact with each other. A reset member (123) is arranged on the inner wall of the liquid inlet chamber (6). When the sliding seat (42) moves downward, the first linkage block (121) moves downward, the reset member (123) is compressed, and the elastic member (15) drives the closing strip (8) to slide in a direction away from each other; when the sliding seat (42) slides upward, the reset member (123) drives the first linkage block (121) to move upward, thereby pushing the closing strips (8) to approach each other, and the elastic member (15) is in a stretched state.

7. A liquefied natural gas heat preservation storage device according to claim 6, characterized in that: The inner wall of the liquid inlet chamber (6) is provided with a mounting groove (18), the first linkage block (121) is slidably mounted in the mounting groove (18), the reset member (123) is mounted between the lower end of the first linkage block (121) and the inner bottom surface of the mounting groove (18), and the lower surface of the sliding seat (42) is provided with a push rod (19) extending downward and connected to the first linkage block (121).

8. A liquefied natural gas heat preservation storage device according to claim 7, characterized in that: The extrusion member (43), the elastic member (15) and the reset member (123) are all springs.

9. A method for using a liquefied natural gas heat preservation storage device, using the storage device according to any one of claims 2 to 8, characterized in that: The following steps are involved: (1) When filling, the filling tube is inserted into the feed tube (3), the end of the filling tube abuts against the upper surface of the sliding seat (42), and the sliding seat (42) is driven to move downward, so that the through hole (10) is exposed, and the liquid enters the through tube (41) through the through hole (10), then enters the extension tube (5), and enters the tank body (1) through the opening (7); (2) After filling, the filling tube is pulled out, and the sliding seat (42) is reset under the action of the extruder (43) and covers the through hole (10).

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