LNG (Liquefied Natural Gas) deep pipeline heat insulation and cold insulation assembly

Abstract

The utility model relates to the technical field of heat preservation of liquefied natural gas pipelines, and discloses an LNG deep pipeline heat insulation and cold insulation assembly which comprises a natural gas conveying pipeline, and a plurality of sets of symmetrical heat insulation and cold insulation structures are detachably installed on the natural gas conveying pipeline. Wherein each set of symmetrical heat insulation and cold insulation structure comprises an arc-shaped fixing plate, the two arc-shaped fixing plates are symmetrically installed on the outer wall of the natural gas conveying pipeline in a clamped mode, arc-shaped heat insulation plates are installed on the inner sides of the two arc-shaped fixing plates, and arc-shaped heat insulation plates are installed on the outer sides of the arc-shaped fixing plates. According to the heat insulation and cold insulation structure, after the multiple sets of symmetrical heat insulation and cold insulation structures are installed on the natural gas conveying pipeline, heat insulation and cold insulation can be conducted on liquefied natural gas conveyed in the natural gas conveying pipeline, the multiple sets of symmetrical heat insulation and cold insulation structures are not prone to being damaged in the pre-burying process, and meanwhile the heat insulation and cold insulation structure is convenient to install. And each group of symmetrical heat insulation and cold insulation structures can be conveniently mounted and dismounted.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal insulation of liquefied natural gas pipelines, in particular to a thermal insulation and cold preservation component for LNG deep pipelines. Background Art

[0002] Liquefied natural gas (LNG) is transported over long distances through pipelines. Before transporting liquefied natural gas, the pipelines need to be buried underground, and after being buried underground, the pipelines need to be insulated.

[0003] For example, patent document CN207049517U discloses a natural gas pipeline cold preservation device, which states in its technical problem as follows: "... the existing liquefied natural gas pipeline cold preservation facilities simply add thermal insulation foam, which has poor weather resistance and poor thermal insulation... "

[0004] It can be clearly known from the evidence of the technical problems in the above-mentioned patent documents that in the prior art, after the transmission pipeline is pre-buried underground, it is often only wrapped with thermal insulation foam. However, simply wrapping the transmission pipeline with thermal insulation foam can easily cause the thermal insulation foam to rupture during the pre-buried process, thereby affecting the thermal insulation and cold preservation effect of liquefied natural gas.

[0005] Based on this, an LNG deep pipeline heat insulation and cold preservation component is proposed. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] In view of the deficiencies in the prior art, the utility model provides an LNG deep pipeline insulation and cold preservation component to solve the problem raised in the background technology: after the delivery pipeline is pre-buried underground, the delivery pipeline is often only wrapped with insulation foam. However, simply wrapping the delivery pipeline with insulation foam can easily cause the insulation foam to rupture during the pre-buried process, thereby affecting the insulation and cold preservation effect of liquefied natural gas.

[0008] (II) Technical solution

[0009] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0010] An LNG deep-layer pipeline heat insulation and cold preservation assembly comprises a natural gas transmission pipeline, on which a plurality of groups of symmetrical heat insulation and cold preservation structures are detachably installed, and each group of the symmetrical heat insulation and cold preservation structures is distributed along the length direction of the natural gas transmission pipeline;

[0011] Each group of the symmetrical heat-insulating and cold-insulating structures comprises an arc-shaped fixing plate, two of the arc-shaped fixing plates are symmetrically mounted on the outer wall of the natural gas transmission pipeline, the inner sides of the two arc-shaped fixing plates are mounted with an arc-shaped heat-insulating plate, and the outer sides of the arc-shaped fixing plates are mounted with an arc-shaped heat-insulating plate;

[0012] After the two arc-shaped fixing plates are clamped and installed on the outer wall of the natural gas transmission pipeline, the inner side walls of the two arc-shaped insulation plates are both in contact with the outer wall of the natural gas transmission pipeline.

[0013] Preferably, the inner side walls of the two arc-shaped fixing plates are each provided with an inner arc-shaped groove, and the two arc-shaped insulation plates are respectively embedded in the corresponding inner arc-shaped grooves, and after embedding, the two arc-shaped insulation plates are both bonded and fixed to the corresponding inner arc-shaped grooves.

[0014] Preferably, the outer side walls of the two arc-shaped fixing plates are each provided with an outer arc-shaped groove, and the two arc-shaped heat insulation plates are respectively embedded in the corresponding outer arc-shaped grooves, and after embedding, the two arc-shaped heat insulation plates are both bonded and fixed to the corresponding outer arc-shaped grooves.

[0015] Preferably, fixing ears are fixedly installed on the top and bottom of the two arc-shaped fixing plates, and a clamping groove is formed between the two fixing ears and both ends of the outer arc-shaped groove;

[0016] Both ends of the arc-shaped heat insulation board can be plugged and installed in the corresponding clamping grooves.

[0017] Preferably, locking holes are provided on both sides of the two groups of fixing ears, and locking structures are detachably installed between adjacent locking holes.

[0018] Preferably, each group of the locking structures includes a connecting plate, and screws are fixedly installed at both ends of the side walls of the connecting plate. The two screws can be inserted and installed in the corresponding locking holes. Nuts are threadedly installed on the two screws, and the nuts can be loosened or tightened on the corresponding screws. When tightened, the nuts can clamp the two fixing ears.

[0019] Preferably, the curvature of the two arc-shaped fixing plates matches the curvature of the natural gas transmission pipeline.

[0020] Preferably, the curvatures of the two arc-shaped insulation plates match the curvatures of the corresponding inner arc-shaped grooves.

[0021] Preferably, the curvatures of the two arc-shaped heat insulation plates match the curvatures of the corresponding outer arc-shaped grooves.

[0022] (III) Beneficial effects

[0023] The utility model provides a LNG deep pipeline heat insulation and cold preservation component, which has the following beneficial effects:

[0024] 1. In the utility model, after multiple groups of symmetrical heat-insulating and cold-preserving structures are installed on the natural gas transmission pipeline, the liquefied natural gas transported in the natural gas transmission pipeline can be insulated and cold-preserved. In addition, the multiple groups of symmetrical heat-insulating and cold-preserving structures are not easily damaged during the pre-embedding process. At the same time, each group of symmetrical heat-insulating and cold-preserving structures can be easily installed and disassembled.

[0025] 2. In the utility model, after the two arc-shaped fixing plates are snap-fitted and installed on the outer wall of the natural gas transmission pipeline, the inner walls of the two arc-shaped insulation plates are in contact with the outer wall of the natural gas transmission pipeline. Therefore, when the two arc-shaped fixing plates are snap-fitted and installed, the two arc-shaped insulation plates can keep the liquefied natural gas transported in the natural gas transmission pipeline warm and cold, and the two arc-shaped insulation plates can insulate the liquefied natural gas transported in the natural gas transmission pipeline.

[0026] 3. In the utility model, the two arc-shaped insulation boards are respectively embedded in the corresponding inner arc-shaped grooves, and after embedding, the two arc-shaped insulation boards are bonded and fixed to the corresponding inner arc-shaped grooves, thereby effectively solving the problem of installing and fixing the arc-shaped insulation boards on the inner side of the arc-shaped fixing plate.

[0027] 4. In the present invention, the two arc-shaped heat insulation boards are respectively embedded in the corresponding outer arc-shaped grooves, and after embedding, the two arc-shaped heat insulation boards are bonded and fixed to the corresponding outer arc-shaped grooves, thereby effectively solving the problem of installing and fixing the arc-shaped heat insulation boards on the outside of the arc-shaped fixing plate.

[0028] 5. In the present invention, a snap-in groove is formed between the two fixing ears and the two ends of the outer arc-shaped groove, and both ends of the arc-shaped heat insulation board can be inserted and installed in the corresponding snap-in groove, so that the arc-shaped heat insulation board can be effectively fixed.

[0029] 6. In the present invention, locking structures are detachably installed between adjacent locking holes, and the two arc-shaped fixing plates can be conveniently installed or removed through the locking structures.

[0030] 7. In the present invention, the nut can be loosened or tightened on the corresponding screw rod. When tightened, the nut can clamp the two fixing ears. When the two opposite fixing ears are clamped and fixed, the two arc-shaped fixing plates can be locked and fixed.

[0031] 8. In the utility model, when the curvature of the two arc-shaped fixing plates matches the curvature of the natural gas transmission pipeline, the two arc-shaped fixing plates can be mounted on the outer wall of the natural gas transmission pipeline so that the inner sides of the two arc-shaped fixing plates can better fit with the outer wall of the natural gas transmission pipeline. When the inner sides of the two arc-shaped fixing plates fit with the outer wall of the natural gas transmission pipeline, the arc-shaped insulation plates installed on the inner sides of the two arc-shaped fixing plates can better fit with the outer wall of the natural gas transmission pipeline, thereby improving the insulation effect of the two arc-shaped insulation plates on the natural gas transported in the natural gas transmission pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A three-dimensional schematic diagram of the utility model installed on a natural gas transmission pipeline;

[0033] Figure 2 It is a three-dimensional schematic diagram of the utility model;

[0034] Figure 3 It is a three-dimensional schematic diagram of the symmetrical heat insulation and cold preservation structure of the utility model;

[0035] Figure 4 It is an exploded schematic diagram of the symmetrical heat insulation and cold preservation structure of the utility model;

[0036] Figure 5 A three-dimensional schematic diagram of one viewing angle of the arc-shaped fixing plate of the utility model;

[0037] Figure 6 A three-dimensional schematic diagram of the arc-shaped fixing plate of the utility model from a second perspective;

[0038] Figure 7 It is a three-dimensional schematic diagram of the locking structure of the utility model.

[0039] In the figure: 10, natural gas transmission pipeline; 20, symmetrical heat insulation and cold preservation structure; 201, arc-shaped fixing plate; 2011, inner arc-shaped groove; 2012, outer arc-shaped groove; 2013, fixing ear; 2014, snap-in groove; 2015, locking hole; 202, arc-shaped thermal insulation board; 203, arc-shaped heat insulation board; 30, locking structure; 301, connecting plate; 302, screw; 303, nut. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] Embodiment 1

[0042] Liquefied natural gas (LNG) is transported over long distances through pipelines. Before transporting liquefied natural gas, the pipelines need to be buried underground, and after being buried underground, the pipelines need to be insulated.

[0043] After the transmission pipeline is pre-buried underground, it is often only wrapped with thermal insulation foam. However, simply wrapping the transmission pipeline with thermal insulation foam can easily cause the thermal insulation foam to rupture during the pre-buried process, thereby affecting the thermal insulation and cold preservation effect of liquefied natural gas.

[0044] Based on this, in order to solve the above technical problems, the R&D personnel have adopted the following technical solutions, as follows:

[0045] like Figure 1-7 As shown, the utility model provides a technical solution:

[0046] An LNG deep pipeline heat insulation and cold preservation component includes a natural gas transmission pipeline 10, the natural gas transmission pipeline 10 is used to transport liquefied natural gas (i.e., LNG), and multiple groups of symmetrical heat insulation and cold preservation structures 20 are detachably installed on the natural gas transmission pipeline 10, each group of symmetrical heat insulation and cold preservation structures 20 is distributed along the length direction of the natural gas transmission pipeline 10, when the multiple groups of symmetrical heat insulation and cold preservation structures 20 are installed on the natural gas transmission pipeline 10, the liquefied natural gas transported in the natural gas transmission pipeline 10 can be insulated and cold preserved, and the multiple groups of symmetrical heat insulation and cold preservation structures 20 are not easily damaged during the pre-embedding process, and at the same time, each group of symmetrical heat insulation and cold preservation structures 20 can be conveniently installed and disassembled;

[0047] Each set of symmetrical heat-insulating and cold-insulating structures 20 includes an arc-shaped fixing plate 201, and two arc-shaped fixing plates 201 are symmetrically mounted on the outer wall of the natural gas transmission pipeline 10, and arc-shaped heat-insulating plates 202 are mounted on the inner sides of the two arc-shaped fixing plates 201, and arc-shaped heat-insulating plates 203 are mounted on the outer sides of the arc-shaped fixing plates 201;

[0048] After the two arc-shaped fixing plates 201 are snap-fitted and installed on the outer wall of the natural gas transmission pipeline 10, the inner walls of the two arc-shaped insulation plates 202 are in contact with the outer wall of the natural gas transmission pipeline 10. Therefore, when the two arc-shaped fixing plates 201 are snap-fitted and installed, the two arc-shaped insulation plates 202 can keep the liquefied natural gas transported in the natural gas transmission pipeline 10 warm and cold, and the two arc-shaped insulation plates 203 can insulate the liquefied natural gas transported in the natural gas transmission pipeline 10.

[0049] Specifically, the curvature of the two arc-shaped fixing plates 201 matches the curvature of the natural gas transmission pipeline 10 .

[0050] In this embodiment, when the curvature of the two arc-shaped fixing plates 201 matches the curvature of the natural gas transmission pipeline 10, the two arc-shaped fixing plates 201 can be snap-fitted onto the outer wall of the natural gas transmission pipeline 10 so that the inner sides of the two arc-shaped fixing plates 201 can better fit with the outer wall of the natural gas transmission pipeline 10. When the inner sides of the two arc-shaped fixing plates 201 fit with the outer wall of the natural gas transmission pipeline 10, the arc-shaped insulation plates 202 installed on the inner sides of the two arc-shaped fixing plates 201 can better fit with the outer wall of the natural gas transmission pipeline 10, thereby improving the insulation effect of the two arc-shaped insulation plates 202 on the natural gas transported in the natural gas transmission pipeline 10.

[0051] Embodiment 2

[0052] like Figure 1-7 As shown, based on the first embodiment, the following improvements are made:

[0053] In order to solve the problem of installing and fixing the arc-shaped insulation board 202 on the inner side of the arc-shaped fixing board 201, the inventor, in the present embodiment, further, the inner side walls of the two arc-shaped fixing boards 201 are provided with inner arc-shaped grooves 2011, and the two arc-shaped insulation boards 202 are respectively embedded in the corresponding inner arc-shaped grooves 2011, and after embedding, the two arc-shaped insulation boards 202 are both bonded and fixed to the corresponding inner arc-shaped grooves 2011.

[0054] In order to make the arc-shaped insulation board 202 and the inner arc-shaped groove 2011 fit better, the inventors, in this embodiment, specifically, match the curvature of the two arc-shaped insulation boards 202 with the curvature of the corresponding inner arc-shaped groove 2011.

[0055] In order to solve the problem of installing and fixing the arc-shaped heat insulation board 203 on the outer side of the arc-shaped fixing plate 201, the inventor, in this embodiment, further, the outer side walls of the two arc-shaped fixing plates 201 are provided with outer arc-shaped grooves 2012, and the two arc-shaped heat insulation boards 203 are respectively embedded in the corresponding outer arc-shaped grooves 2012, and after embedding, the two arc-shaped heat insulation boards 203 are both bonded and fixed to the corresponding outer arc-shaped grooves 2012.

[0056] In order to make the arc-shaped heat insulation board 203 and the outer arc-shaped groove 2012 fit better, the inventors, in this embodiment, specifically, match the curvature of the two arc-shaped heat insulation boards 203 with the curvature of the corresponding outer arc-shaped groove 2012.

[0057] In order to better fix the arc-shaped heat insulation board 203 in the outer arc-shaped groove 2012, the inventor further, in this embodiment, the top and bottom of the two arc-shaped fixing plates 201 are fixedly installed with fixing ears 2013. After the two arc-shaped fixing plates 201 are snap-fitted and installed, the two fixing ears 2013 arranged opposite to each other can fit each other, and after fitting, can overlap each other;

[0058] Wherein, a clamping groove 2014 is formed between the two fixing ears 2013 and both ends of the outer arc-shaped groove 2012;

[0059] Both ends of the arc-shaped heat insulation board 203 can be inserted and installed in the corresponding clamping grooves 2014, so that the arc-shaped heat insulation board 203 can be effectively fixed.

[0060] Embodiment 3

[0061] like Figure 1-7 As shown, based on the second embodiment, the following improvements are made:

[0062] In order to solve the problem of fastening the two arc-shaped fixing plates 201 after being installed by snap-fitting, the inventor has, in this embodiment, further provided locking holes 2015 on both sides of the two sets of fixing ears 2013, and locking structures 30 are detachably installed between adjacent locking holes 2015, so that the two arc-shaped fixing plates 201 can be conveniently installed or removed through the locking structure 30.

[0063] Embodiment 4

[0064] like Figure 1-7 As shown, based on the third embodiment, the following improvements are made:

[0065] In order to optimize the specific structure of the locking structure 30 and enable the locking structure 30 to better lock and fix the two arc-shaped fixing plates 201, the inventors, in the present embodiment, further, each group of locking structures 30 includes a connecting plate 301, and screws 302 are fixedly installed at both ends of the side walls of the connecting plate 301, and the two screws 302 can be plugged and installed in the corresponding locking holes 2015, and nuts 303 are threadedly installed on the two screws 302, and the nuts 303 can be loosened or tightened on the corresponding screws 302. When tightened, the nuts 303 can clamp the two fixing ears 2013. When the two opposite fixing ears 2013 are clamped and fixed, the two arc-shaped fixing plates 201 can be locked and fixed.

[0066] In summary, the workflow of the utility model is:

[0067] like Figure 1-7As shown, the natural gas transmission pipeline 10 is used to transport liquefied natural gas (i.e., LNG). Multiple groups of symmetrical heat-insulating and cold-preserving structures 20 are detachably installed on the natural gas transmission pipeline 10. Each group of symmetrical heat-insulating and cold-preserving structures 20 is distributed along the length direction of the natural gas transmission pipeline 10. When the multiple groups of symmetrical heat-insulating and cold-preserving structures 20 are installed on the natural gas transmission pipeline 10, the liquefied natural gas transported in the natural gas transmission pipeline 10 can be insulated and cold-preserved. In addition, the multiple groups of symmetrical heat-insulating and cold-preserving structures 20 are not easily damaged during the pre-embedding process. At the same time, each group of symmetrical heat-insulating and cold-preserving structures 20 can be easily installed and disassembled.

[0068] Specifically, after the two arc-shaped fixing plates 201 are snap-fitted and installed on the outer wall of the natural gas transmission pipeline 10, the inner walls of the two arc-shaped insulation plates 202 are in contact with the outer wall of the natural gas transmission pipeline 10. Therefore, when the two arc-shaped fixing plates 201 are snap-fitted and installed, the two arc-shaped insulation plates 202 can keep the liquefied natural gas transported in the natural gas transmission pipeline 10 warm and cold, and the two arc-shaped insulation plates 203 can insulate the liquefied natural gas transported in the natural gas transmission pipeline 10.

[0069] The two arc-shaped fixing plates 201 can be conveniently installed or removed through the locking structure 30 .

[0070] Specifically, the nut 303 can be loosened or tightened on the corresponding screw rod 302. When tightened, the nut 303 can clamp the two fixing ears 2013. When the two opposite fixing ears 2013 are clamped and fixed, the two arc-shaped fixing plates 201 can be locked and fixed.

[0071] The above different embodiments can be combined, replaced and used in conjunction with each other.

[0072] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0073] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An LNG deep pipeline heat and cold insulation component, comprising a natural gas transmission pipeline (10), characterized in that: A plurality of groups of symmetrical heat-insulating and cold-preserving structures (20) are detachably mounted on the natural gas transmission pipeline (10), and each group of the symmetrical heat-insulating and cold-preserving structures (20) is distributed along the length direction of the natural gas transmission pipeline (10); Each group of the symmetrical heat-insulating and cold-insulating structures (20) comprises an arc-shaped fixing plate (201), two of the arc-shaped fixing plates (201) are symmetrically snap-fitted and mounted on the outer wall of the natural gas transmission pipeline (10), the inner sides of the two arc-shaped fixing plates (201) are both mounted with an arc-shaped heat-insulating plate (202), and the outer sides of the arc-shaped fixing plates (201) are both mounted with an arc-shaped heat-insulating plate (203); After the two arc-shaped fixing plates (201) are snap-fitted onto the outer wall of the natural gas transmission pipeline (10), the inner side walls of the two arc-shaped insulation plates (202) are in contact with the outer wall of the natural gas transmission pipeline (10).

2. The LNG deep pipeline heat and cold insulation component according to claim 1 is characterized by: The inner side walls of the two arc-shaped fixing plates (201) are each provided with an inner arc-shaped groove (2011), and the two arc-shaped thermal insulation plates (202) are respectively embedded in the corresponding inner arc-shaped grooves (2011), and after embedding, the two arc-shaped thermal insulation plates (202) are both bonded and fixed to the corresponding inner arc-shaped grooves (2011).

3. The LNG deep pipeline heat and cold insulation component according to claim 1 is characterized by: The outer side walls of the two arc-shaped fixing plates (201) are each provided with an outer arc-shaped groove (2012), and the two arc-shaped heat insulation plates (203) are respectively embedded in the corresponding outer arc-shaped grooves (2012), and after embedding, the two arc-shaped heat insulation plates (203) are both bonded and fixed to the corresponding outer arc-shaped grooves (2012).

4. The LNG deep pipeline heat and cold insulation component according to claim 3 is characterized by: The top and bottom of the two arc-shaped fixing plates (201) are both fixedly mounted with fixing ears (213), and a clamping groove (214) is formed between the two fixing ears (2013) and both ends of the outer arc-shaped groove (2012); Both ends of the arc-shaped heat insulation plate (203) can be plugged and installed in corresponding clamping grooves (2014).

5. The LNG deep pipeline insulation and cold preservation assembly according to claim 4, characterized in that: Locking holes (2015) are provided on both sides of the two groups of fixing ears (2013), and locking structures (30) are detachably installed between adjacent locking holes (2015).

6. The LNG deep pipeline insulation and cold preservation assembly according to claim 5, characterized in that: Each group of the locking structures (30) comprises a connecting plate (301), and screw rods (302) are fixedly mounted on both ends of the side walls of the connecting plate (301), and the two screw rods (302) can be inserted and installed in corresponding locking holes (2015), and nuts (303) are threadedly mounted on the two screw rods (302), and the nuts (303) can be loosened or tightened on the corresponding screw rods (302), and when tightened, the nuts (303) can clamp the two fixing ears (2013).

7. The LNG deep pipeline insulation and cold preservation assembly according to claim 1, characterized in that: The curvature of the two arc-shaped fixing plates (201) matches the curvature of the natural gas transmission pipeline (10).

8. The LNG deep pipeline insulation and cold preservation assembly according to claim 2, characterized in that: The curvatures of the two arc-shaped insulation plates (202) match the curvatures of the corresponding inner arc-shaped grooves (2011).

9. The LNG deep pipeline heat and cold insulation component according to claim 3, characterized in that: The curvatures of the two arc-shaped heat insulation plates (203) match the curvatures of the corresponding outer arc-shaped grooves (2012).

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