Insulated pipe clamp for cryogenic piping of a ship

Abstract

The present application relates to the technical fields of ship pipeline installation, and especially to a heat-insulated fixing pipe clamp for low-temperature pipeline of a ship, comprising a knee plate, a mounting plate, an arc plate assembly, a first bolt set, an angle steel, a second bolt set and a backing plate; the arc plate assembly is welded to the outer wall of the low-temperature pipeline by the high-strength second bolt set cooperating with the ship structure, so as to provide stable and reliable fixing constraint for the low-temperature pipeline, effectively limit the expansion displacement of the pipeline due to temperature change, and ensure the long-term structural stability of the pipeline system; the transmission of cold energy from the low-temperature pipeline to the ship structure is effectively blocked by the backing plate arranged between the knee plate and the angle steel, so as to reduce the loss of cold energy and avoid the performance degradation of the ship structure due to low temperature; the pipe clamp body is made of SUSL (ultra-low carbon stainless steel) material, which has good low-temperature resistance and corrosion resistance; the arc plate assembly and the knee plate are detachably connected, so as to facilitate the replacement and adjustment according to the pipe diameter, and facilitate the later maintenance, thereby reducing the maintenance frequency and cost.

Description

Technical Field

[0001] This invention relates to the field of marine pipeline installation technology, and more specifically to thermally insulated fixing clamps for marine cryogenic pipelines. Background Technology

[0002] In dual-fuel ship applications, cryogenic pipelines are used to transport cryogenic media, ensuring the ship's propulsion and other functions. For cryogenic pipelines, in addition to the conventional constraints required at the locations where they pass through sealed compartment plates, long-distance pipeline layouts require the installation of fixed points to constrain the expansion displacement of the pipelines due to temperature changes. At the same time, it is necessary to prevent excessive transfer of cold energy from the pipelines from affecting the hull structure and system performance.

[0003] Currently, when existing cryogenic pipelines are laid out over long distances, the fixed structure cannot effectively constrain the expansion and displacement of the pipelines caused by temperature changes, thus failing to ensure the structural stability of the pipeline system. Furthermore, the existing fixed structure has poor thermal insulation between itself and the hull structure, resulting in the transfer of cold energy from the cryogenic pipelines to the hull structure and causing cold energy loss. At the same time, the hull structure will experience performance degradation due to low temperatures. In addition, traditional pipe clamps are mostly integral structures, which are complex to operate when adjustments or replacements are needed, leading to high maintenance difficulty and costs.

[0004] Based on this, the present invention designs a heat-insulating fixing clamp for cryogenic pipelines in ships to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a heat-insulating fixing clamp for cryogenic pipelines in ships.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a heat-insulating fixing clamp for marine cryogenic pipelines, comprising: An elbow plate is used to fix the pipe clamp vertically. The elbow plate has two first positioning holes vertically and mounting holes symmetrically arranged laterally. A mounting plate is disposed at the top of the elbow plate, and a first bolt hole is provided on the mounting plate; An arc-shaped plate assembly is fixedly installed on the upper end of the mounting plate to cover and fix the low-temperature pipeline; The first bolt group is used for the detachable installation of the mounting plate and the arc plate assembly; An angle steel is provided on the back of the elbow plate, with one end fixedly connected to the elbow plate and the other end fixedly connected to the hull structure. The second bolt group is used for the fixed connection between the elbow plate and the angle steel or the angle steel and the hull structure. The number of the second bolt group is four groups. A pad is placed between the elbow plate and the angle steel to achieve heat insulation.

[0007] As a preferred embodiment of the present invention, the arc-shaped plate assembly includes: The base plate is the same shape and size as the mounting plate, and the base plate has through holes of the same diameter at positions corresponding to the first bolt holes; A support plate is disposed at the center of the upper end of the base plate; The intermediate petal is fixedly connected to the top of the support plate; Mounting slots are provided at both ends of the arc-shaped middle lobe; The connector is installed in the mounting slot; The segmented petals are movably mounted on the connector.

[0008] As a preferred embodiment of the present invention, the angle steel comprises: The steel body is used to fix the main body of the pipe clamp to the hull structure of the ship, serving a load-bearing and fixing function; The second bolt hole is formed on the vertical plate of the steel body, and the position of the second bolt hole corresponds to the position of the second bolt group. The first positioning post is located on the left side facing the pad, and is used for quick installation and positioning of the elbow plate and the pad. The second positioning post is located on the right side facing the pad, and is slightly shorter than the first positioning post. It is used for quick installation and positioning of the pad on the right side of the angle steel.

[0009] As a preferred embodiment of the present invention, the pad includes: Composite plate body, used to block heat conduction between the pipe clamp body and the low temperature pipeline; A sealing edge is provided around the perimeter of the composite plate. A stainless steel bushing is provided in the bolt holes opened on the composite plate. The second positioning holes are opened at the four corners of the composite plate and are respectively connected to the first positioning post and the second positioning post on the angle steel.

[0010] As a preferred embodiment of the present invention, the composite plate is composed of an outer PTFE layer and an inner embedded aerogel felt layer, and is used for effective thermal insulation between low-temperature pipelines and the ship's hull structure.

[0011] As a preferred embodiment of the present invention, gaskets are provided at the connection points between the first bolt group and the mounting plate and the arc plate assembly, and flat washers and spring washers are provided at the connection points between the second bolt group and the elbow plate and the hull structure.

[0012] As a preferred embodiment of the present invention, triangular ribs are symmetrically welded to the left and right perpendicular points where the mounting plate and the elbow plate are connected, in order to enhance the stability of the structure.

[0013] As a preferred embodiment of the present invention, the elbow plate, mounting plate, arc plate assembly and angle steel are all made of low-carbon stainless steel.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention connects the high-strength second bolt group to the hull structure and welds the arc plate assembly to the outer wall of the cryogenic pipeline, providing a stable and reliable fixation constraint for the cryogenic pipeline, effectively limiting the expansion displacement of the pipeline caused by temperature changes, and ensuring the long-term structural stability of the pipeline system. The pad between the elbow plate and the angle steel effectively blocks the transfer of cold energy from the cryogenic pipeline to the hull structure, reducing cold loss and preventing the hull structure from deteriorating due to low temperature. The pipe clamp body is made of SUSL (ultra-low carbon stainless steel), which has good low temperature resistance and corrosion resistance. The arc plate assembly and the elbow plate are detachably connected, which is convenient for replacement and adjustment according to the pipe diameter, and at the same time facilitates later maintenance, reducing maintenance frequency and cost. 2. This invention designs the arc-shaped plate as a three-lobed structure, with the middle lobe and the sub-lobes movably connected by connectors. Each lobe is arc-shaped and fits against the outer wall of the pipeline to form a covering structure. This not only wraps and fixes the pipeline, but also provides a small amount of elastic deformation space in the radial direction, which better adapts to the radial contraction of the pipeline caused by temperature changes, reduces the stress at the welding parts, and can adapt to the deformation by the radial opening and closing between the lobes when the pipeline expands and displaces due to temperature changes, avoiding stress concentration caused by rigid constraints. 3. The outer layer of the composite plate of this invention is pure PTFE (polytetrafluoroethylene), and the inner layer is embedded with aerogel felt to form a "PTFE-aerogel-PTFE" composite pad, which can significantly improve the heat insulation effect at the same thickness. By pre-embedding or pressing stainless steel bushings at the bolt holes of the pad, the bolts are prevented from directly squeezing and cutting the PTFE material to form a "cold bridge", which enhances the pressure bearing capacity and durability of the hole wall and ensures the long-term stability of the bolt preload. A thin and flexible sealing edge is designed around the edge of the pad, which can form a tighter contact with the hull structure and elbow plate after installation and tightening, blocking air convection, further improving the overall heat insulation performance, and preventing moisture intrusion. 4. This invention adds a first positioning post and a second positioning post to the angle steel, and in conjunction with the first positioning hole and the second positioning hole opened at the corresponding positions on the elbow plate and the pad, enables the fixed pipe clamp to be quickly and accurately positioned during installation, improving installation convenience and preventing the installation efficiency from being affected by slippage. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1This is a schematic diagram of the overall installation structure of the present invention; Figure 2 This is a schematic diagram of the overall installation and unfolding structure of the present invention; Figure 3 This is a schematic diagram of the overall front view of the fixing pipe clamp of the present invention; Figure 4 This is a schematic diagram of the overall rear view of the fixing pipe clamp of the present invention; Figure 5 This is a schematic diagram of the overall exploded structure of the fixing pipe clamp of the present invention; Figure 6 This is an exploded view of the arc-shaped plate assembly of the present invention; Figure 7 This is a schematic diagram of the overall structure of the angle steel of the present invention. Figure 8 This is a schematic diagram of the overall structure of the pad of the present invention when unfolded; Figure 9 This is a schematic diagram of the side cross-section of the pad structure of the present invention.

[0016] In the diagram: 1. Elbow plate; 101. First positioning hole; 102. Mounting hole; 2. Mounting plate; 201. First bolt hole; 3. Arc plate assembly; 301. Base plate; 302. Support plate; 303. Intermediate petal; 304. Mounting groove; 305. Connector; 306. Split petal; 4. First bolt group; 5. Angle steel; 501. Steel body; 502. Second bolt hole; 503. First positioning post; 504. Second positioning post; 6. Second bolt group; 7. Pad; 701. Composite plate; 7011. PTFE layer; 7012. Aerogel felt layer; 702. Sealing edge; 703. Stainless steel bushing; 704. Second positioning hole; 8. Hull structure. Detailed Implementation

[0017] The following will refer to the appendices in the embodiments of the present invention. Figures 1-9 The technical solutions in the embodiments of the present invention are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0018] Example Please see Figures 1-9The present invention provides the following technical solution: a heat-insulating fixing pipe clamp for marine cryogenic pipelines, comprising an elbow plate 1, a mounting plate 2, an arc plate assembly 3, a first bolt group 4, an angle steel 5, a second bolt group 6, and a pad 7. The upper end of the elbow plate 1 is fixedly connected to the mounting plate 2, and the mounting plate 2 has a first bolt hole 201. The arc plate assembly 3 is fixedly installed on the upper end of the mounting plate 2 by the first bolt group 4. An angle steel 5 is fixedly installed behind the elbow plate 1 by two groups of second bolt groups 6, and a pad 7 is provided between the angle steel 5 and the elbow plate 1.

[0019] The other end of the angle steel 5 is fixedly connected to the hull structure 8 by two sets of second bolts 6.

[0020] The elbow plate 1 has two vertical first positioning holes 101 and two horizontally symmetrical mounting holes 102 for quick positioning of the elbow plate 1 and the angle steel 5.

[0021] The arc-shaped plate assembly 3 includes a base plate 301, a support plate 302, an intermediate petal 303, a mounting groove 304, a connector 305, and a segmented petal 306. The support plate 302 is provided at the center of the upper end of the base plate 301. The intermediate petal 303 is fixedly connected to the upper end of the support plate 302. The intermediate petal 303 has mounting grooves 304 at both ends. The connector 305 is provided in each mounting groove 304. The segmented petal 306 is movably installed on the connector 305.

[0022] The aforementioned arc plate assembly 3 is detachably installed to the mounting plate 2 via the first bolt group 4, which facilitates the replacement of arc plate assemblies 3 with different curvatures according to the pipe diameter, so as to be suitable for the fixed use of different low temperature pipelines. At the same time, it facilitates maintenance and improves the versatility, installation convenience and service life of pipeline fixing points.

[0023] The angle steel 5 includes a steel body 501, a second bolt hole 502, a first positioning post 503, and a second positioning post 504. The second bolt hole 502 is opened laterally on the side of the steel body 501 facing the pad 7. The first positioning post 503 is symmetrically arranged vertically on the left end of the side of the steel body 501 facing the pad 7, and the second positioning post 504 is symmetrically arranged vertically on the right end of the side of the steel body 501 facing the pad 7.

[0024] The first positioning post 503 and the second positioning post 504 provided on the angle steel 5, together with the second positioning hole 704 opened on the pad 7 and the first positioning hole 101 opened on the elbow plate 1, facilitate the quick assembly and positioning of the elbow plate 1, the pad 7 and the angle steel 5, and improve the convenience of installation.

[0025] The pad 7 includes a composite plate body 701, a sealing edge 702, a stainless steel bushing 703, and a second positioning hole 704. Bolt through holes are opened horizontally on the composite plate body 701, and stainless steel bushings 703 are pre-embedded in the bolt through holes. The sealing edge 702 is provided around the perimeter of the composite plate body 701, and a second positioning hole 704 is provided at each of the four corners of the composite plate body 701.

[0026] The composite plate 701 is composed of an outer PTFE layer 7011 and an inner embedded aerogel felt layer 7012, and is used for effective thermal insulation between low-temperature pipelines and the ship's hull structure.

[0027] The "PTFE-aerogel-PTFE" composite pad formed by the aforementioned pad 7 significantly improves the thermal insulation effect, effectively blocks the transfer of cold energy from the low-temperature pipeline to the hull structure through the pipe clamp assembly, reduces cold energy loss, and prevents the hull structure from deteriorating due to low temperature, thus exhibiting good thermal insulation performance.

[0028] Gaskets are provided at the connection points between the first bolt group 4 and the mounting plate 2 and the arc plate assembly 3, and flat washers and spring washers are provided at the connection points between the second bolt group 6 and the elbow plate 1 and the hull structure 8.

[0029] By placing washers during bolt assembly installation, the contact area between the bolt or nut and the connected parts can be increased, thereby reducing the pressure per unit area, effectively preventing the material surface from being crushed or scratched, and enhancing the stability of the bolt connection.

[0030] Triangular ribs are symmetrically welded to the left and right sides at the perpendicular points where the mounting plate 2 and the elbow plate 1 are connected, in order to enhance the stability of the structure.

[0031] Elbow plate 1, mounting plate 2, arc plate assembly 3, and angle steel 5 are all made of low-carbon stainless steel.

[0032] The aforementioned low-carbon stainless steel is made of SUS316L material, which has good low-temperature resistance, corrosion resistance and weldability, and improves environmental adaptability, thereby reducing maintenance frequency and cost.

[0033] The working principle and usage process of this invention are as follows: In specific use, the middle petal 303 at the upper end of the arc plate assembly 3 is aligned with and welded to the outer wall of the pipeline. Then, the two movable hinged petals 306 on both sides of the middle petal 303 are welded to the outer wall of the pipeline to fix the arc plate assembly 3 to the pipeline. Then, the arc plate assembly 3 is fixedly assembled with the mounting plate 2 at the upper end of the elbow plate 1 by the first bolt group 4. Then, the pad 7 is connected to the first positioning post 503 and the second positioning post 504 at both ends of the angle steel 5 through the composite plate 701 opened at both ends. The pad 7 is fitted and installed on the surface of the steel body 501. Then, the first positioning post 503 is inserted into the corresponding first positioning post 504 on the elbow plate 1. Within the positioning hole 101, the angle steel 5, the pad 7, and the elbow plate 1 are quickly pre-positioned and installed. Then, the connection between the elbow plate 1, the angle steel 5, and the pad 7 is tightened by two sets of second bolts 6, completing the assembly of each component of the fixed pipe clamp. Then, the pipe clamp assembly is tightened to the hull structure 8 by two sets of second bolts 6, thus completing the pipe clamp installation and providing a stable and reliable fixed constraint for the cryogenic pipeline. After installation, check whether each component of the pipe clamp is installed in place, whether there are any defects in the welding parts, and whether the bolt tightening meets the standards, to ensure the constraint effect of the pipe clamp assembly on the displacement of the cryogenic pipeline. Through the multi-layer composite thermal insulation design of the pad 7, the cold energy of the cryogenic pipeline is effectively blocked from being transferred to the hull structure, reducing the loss of cold energy.

[0034] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A heat-insulating fixing clamp for cryogenic pipelines in ships, characterized in that, include: Elbow plate (1) is used to fix the vertical support of the pipe clamp. Two first positioning holes (101) are vertically opened on the elbow plate (1), and mounting holes (102) are also symmetrically opened laterally on the elbow plate (1). Mounting plate (2) is provided at the top of the elbow plate (1), and the mounting plate (2) has a first bolt hole (201). The arc-shaped plate assembly (3) is fixedly installed on the upper end of the mounting plate (2) to cover and fix the low-temperature pipeline; The first bolt group (4) is used for the detachable installation of the mounting plate (2) and the arc plate assembly (3); Angle steel (5) is set on the back of the elbow plate (1), with one end fixedly connected to the elbow plate (1) and the other end fixedly connected to the hull structure (8). The second bolt group (6) is used for the fixed connection between the elbow plate (1) and the angle steel (5) or the angle steel (5) and the hull structure (8). The number of the second bolt group (6) is four groups. A pad (7) is placed between the elbow plate (1) and the angle steel (5) to achieve heat insulation.

2. The thermally insulated fixing clamp for marine cryogenic pipelines according to claim 1, characterized in that: The arc-shaped plate assembly (3) includes: The base plate (301) has the same shape and size as the mounting plate (2), and the base plate (301) has through holes of the same diameter at the positions corresponding to the first bolt holes (201); A support plate (302) is disposed at the center of the upper end of the base plate (301); The intermediate lobe (303) is fixedly connected to the top of the support plate (302); Mounting grooves (304) are provided at both ends of the arc of the intermediate lobe (303); The connector (305) is installed in the mounting slot (304); The segmented petal body (306) is movably mounted on the connector (305).

3. The thermally insulated fixing clamp for marine cryogenic pipelines according to claim 1, characterized in that: The angle steel (5) includes: The steel body (501) is used to fix the main body of the pipe clamp to the hull structure (8) of the ship, and plays a role in bearing and fixing. The second bolt hole (502) is opened on the vertical plate of the steel body (501), and the position of the second bolt hole (502) corresponds to the position of the second bolt group (6); The first positioning post (503) is located on the left side facing the pad (7) and is used for quick installation and positioning of the elbow plate (1) and the pad (7); The second positioning post (504) is located on the right side facing the pad (7), and the second positioning post (504) is slightly shorter than the first positioning post (503) for quick installation and positioning of the pad (7) on the right side of the angle steel (5).

4. The thermally insulated fixing clamp for marine cryogenic pipelines according to claim 1, characterized in that: The pad (7) includes: Composite plate (701) is used to block heat conduction between the pipe clamp body and the low-temperature pipeline; A sealing edge (702) is provided at the edge around the composite plate (701); A stainless steel bushing (703) is provided in a bolt hole opened on the composite plate (701); The second positioning hole (704) is opened at the four corners of the composite plate (701) and is respectively connected to the first positioning post (503) and the second positioning post (504) on the angle steel (5).

5. The thermally insulated fixing clamp for marine cryogenic pipelines according to claim 4, characterized in that: The composite plate (701) is composed of an outer PTFE layer (7011) and an inner embedded aerogel felt layer (7012), and is used for effective thermal insulation between the low-temperature pipeline and the hull structure.

6. The thermally insulated fixing clamp for marine cryogenic pipelines according to claim 1, characterized in that: A gasket is provided at the connection between the first bolt group (4) and the mounting plate (2) and the arc plate assembly (3), and a flat spring gasket is provided at the connection between the second bolt group (6) and the elbow plate (1) and the hull structure (8).

7. The thermally insulated fixing clamp for marine cryogenic pipelines according to claim 1, characterized in that: The mounting plate (2) and the elbow plate (1) are symmetrically welded with triangular ribs at their perpendicular points to each other, which are used to enhance the stability of the structure.

8. The thermally insulated fixing clamp for marine cryogenic pipelines according to claim 1, characterized in that: The elbow plate (1), mounting plate (2), arc plate assembly (3) and angle steel (5) are all made of low-carbon stainless steel.

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