Liquefied natural gas pipeline mounting and positioning assembly

Abstract

The utility model relates to the technical field of pipe fittings, in particular to a liquefied natural gas pipeline installing and positioning assembly which comprises a connecting disc, the connecting disc is installed between two liquefied natural gas pipelines, flanges are fixed to the ends of the liquefied natural gas pipelines, a plurality of screws are fixed to the two sides of the connecting disc respectively, and rubber sleeves are arranged on rod bodies of the screws in a sleeved mode. One end of the screw rod is sleeved and screwed with a nut, the outer ring surface of the connecting disc is provided with a rubber cover, and the rubber cover wraps the flange; the device has the beneficial effects that the rubber cover arranged on the outer ring surface of the connecting disc can wrap and protect the screw rod and the nut. After the screw rod and the nut are in threaded connection, the rubber cover is pulled out of the containing groove and arranged on the flange in a sleeving mode, the rubber ring is arranged at the connecting position of the liquefied natural gas pipe and the flange in a sleeving mode, erosion of external water vapor to the screw rod and the nut can be effectively reduced, the service life of a connecting part is prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of pipe fittings technology, specifically to a liquefied natural gas pipeline installation and positioning component. Background Technology

[0002] In liquefied natural gas (LNG) pipeline installation, ensuring the accuracy and stability of pipeline connections is crucial. Traditional LNG pipeline connection methods have several problems: when connecting two LNG pipes, the lack of effective positioning devices makes it difficult to ensure that the two pipes are not vertically misaligned during the connection process. Vertical misalignment leads to loose pipe connections, increasing the risk of natural gas leaks and posing a serious safety hazard. Conventional connection methods lack temporary limiting measures between connecting components during installation. During the tightening of nuts, the connecting disc is prone to movement, causing bolt hole misalignment, requiring repeated adjustments, which not only increases the difficulty and workload of installation but also prolongs installation time and reduces efficiency. LNG pipelines are usually installed outdoors or in humid environments, making the bolts and nuts at the connection points susceptible to corrosion and rust. Over time, the strength of the bolts and nuts decreases, making them prone to loosening and breakage, affecting the safety and reliability of the pipeline connection. Utility Model Content

[0003] The purpose of this invention is to provide a liquefied natural gas pipeline installation and positioning component to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a liquefied natural gas pipeline installation and positioning component, including a connecting plate, which is installed between two liquefied natural gas pipes. A flange is fixed to the end of each liquefied natural gas pipe. Multiple screws are fixed to both sides of the connecting plate. A rubber sleeve is fitted on the body of each screw, and a nut is screwed onto one end of each screw. A rubber cover is provided on the outer ring surface of the connecting plate, and the rubber cover wraps around the flange.

[0005] Preferably, the inner ring of the connecting plate is integrally formed with a tube, the tube has two sections, the two ends of the tube are symmetrically distributed about the inner ring opening of the connecting plate, and the two tubes are respectively inserted into two liquefied natural gas pipes.

[0006] Preferably, the flange surface has multiple bolt holes, and a groove is formed at the end of the bolt holes away from the connecting plate. The groove is an arc-shaped groove, and the diameter of the end of the groove away from the bolt holes is larger than the diameter of the bolt holes.

[0007] Preferably, one end of the rubber sleeve is inserted into the groove, and the other end of the rubber sleeve extends out of the groove. After the nut and screw are screwed together and locked, the rubber sleeve is clamped in the groove and undergoes elastic deformation.

[0008] Preferably, the outer ring surface of the connecting plate is provided with a receiving groove, which is an annular groove. One end of the rubber cover is fitted and fixed in the receiving groove, and the other end of the rubber cover is fixed with a rubber ring, which is fitted at the connection between the liquefied natural gas pipe and the flange.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] This utility model proposes a liquefied natural gas (LNG) pipeline installation and positioning component. Two integrally formed insertion pipe sections are symmetrically distributed about the inner ring opening of the connecting disc. During installation, the connecting disc is clamped between two LNG pipes, and the two insertion pipes are inserted into the two LNG pipes respectively. This effectively prevents vertical misalignment of the two LNG pipes, ensuring the accuracy of the pipeline connection and improving installation quality. The grooves on the flange surface cooperate with the rubber sleeves fitted on the bolts on both sides of the connecting disc. When the nuts are not installed, the rubber sleeves are engaged in the grooves, providing temporary positioning for the connecting disc and the LNG pipes. This prevents the connecting disc from moving arbitrarily during nut tightening, avoiding bolt hole misalignment, reducing the number of adjustments during installation, greatly improving installation efficiency, and reducing installation difficulty and workload. The rubber cover on the outer ring of the connecting disc provides protection for the bolts and nuts. After the screw and nut are screwed together, the rubber cover is pulled out of the storage groove and put on the flange. The rubber ring is put on the connection between the liquefied natural gas pipe and the flange, which can effectively reduce the corrosion of the screw and nut by external moisture, extend the service life of the connecting parts, and reduce maintenance costs. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a top view of the structure of this utility model;

[0013] Figure 3 for Figure 2 Sectional view of the structure at point AA;

[0014] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0015] Figure 5 This is a schematic diagram of the connection structure of the connecting disc and the insertion tube of this utility model.

[0016] In the diagram: 1. Connecting plate; 2. Insert pipe; 3. Liquefied natural gas pipe; 4. Flange; 5. Bolt hole; 6. Slot; 7. Screw; 8. Rubber sleeve; 9. Nut; 10. Storage slot; 11. Rubber cover; 12. Rubber ring. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] Please see Figures 1 to 5 This utility model provides a technical solution: a liquefied natural gas (LNG) pipeline installation and positioning assembly, including a connecting plate 1, which is installed between two LNG pipes 3. An insert 2 is integrally formed at the inner ring of the connecting plate 1. The insert 2 has two sections, symmetrically distributed about the inner ring opening of the connecting plate 1, and each insert 2 is inserted into one of the two LNG pipes 3. By clamping the connecting plate 1 between the two LNG pipes 3, and with the two inserts 2 inserted into each LNG pipe 3, vertical misalignment of the two LNG pipes 3 is avoided.

[0019] A flange 4 is fixed to the end of the liquefied natural gas pipe 3. Multiple bolt holes 5 are opened on the surface of the flange 4. A groove 6 is opened at the end of the bolt holes 5 away from the connecting plate 1. The groove 6 is an arc-shaped groove. The diameter of the end of the groove 6 away from the bolt holes 5 is larger than the diameter of the bolt holes 5. Multiple screws 7 are fixed on both sides of the connecting plate 1. A rubber sleeve 8 is fitted on the body of the screw 7. A nut 9 is screwed onto one end of the screw 7. One end of the rubber sleeve 8 is inserted into the groove 6, and the other end of the rubber sleeve 8 extends out of the groove 6. After the nut 9 and the screw 7 are screwed and locked, the rubber sleeve 8 is clamped in the groove 6 and undergoes elastic deformation. In use, after the connecting disc 1 is clamped on the two liquefied natural gas pipes 3, the screw 7 passes through the corresponding bolt hole 5, and the rubber sleeve 8 passes through the bolt hole 5 and is locked in the slot 6. The nut 9 is screwed onto the corresponding screw 7 and locked. The slot 6 not only acts as an elastic washer for the screw connection between the screw 7 and the nut 9, but also, when the nut 9 is not installed, the rubber sleeve 8 is locked in the slot 6 to achieve a temporary limiting effect on the connecting disc 1 and the liquefied natural gas pipe 3.

[0020] A rubber cover 11 is provided on the outer ring surface of the connecting plate 1, which wraps around the flange 4. A receiving groove 10 is provided on the outer ring surface of the connecting plate 1. The receiving groove 10 is annular. One end of the rubber cover 11 is fitted and fixed in the receiving groove 10, and a rubber ring 12 is fixed to the other end of the rubber cover 11. The rubber ring 12 is fitted at the connection between the liquefied natural gas pipe 3 and the flange 4. After the screw 7 and nut 9 are screwed together, the rubber cover 11 is pulled out from the receiving groove 10 and fitted onto the flange 4. Then, the rubber ring 12 is fitted at the connection between the flange 4 and the liquefied natural gas pipe 3. At this time, the rubber cover 11 wraps and protects the screw 7 and nut 9, reducing the corrosion of the screw 7 and nut 9 by external moisture.

[0021] Instructions for using the liquefied natural gas (LNG) pipeline installation positioning assembly: Clamp the connecting disc 1 between the two LNG pipes 3, ensuring that the two insert pipe sections 2 at the inner ring of the connecting disc 1 are accurately inserted into the two LNG pipes 3, preventing vertical misalignment. At this point, the connecting disc 1 is positioned appropriately between the two flanges 4, preparing for subsequent connection. Hold the connecting disc 1 and align the screws 7 on both sides with the corresponding bolt holes 5 on the two flanges 4. Slowly push the connecting disc 1 so that the screws 7 pass through the corresponding bolt holes 5, and simultaneously, the rubber sleeves 8 fitted on the screws 7 also pass through the bolt holes 5 and engage in the grooves 6. Due to the special shape of the grooves 6 and the elasticity of the rubber sleeves 8, the rubber sleeves 8 are engaged in the grooves 6 when the nuts 9 are not installed, providing temporary positioning for the connecting disc 1 and the LNG pipes 3, preventing the connecting disc 1 from moving arbitrarily. Then, sequentially install the nuts 9 onto the ends of each screw 7 that protrude from the flange 4. Using a suitable tool (such as a wrench), screw the nut 9 towards the root of the screw 7 until the nut 9 and screw 7 are fully tightened. During the tightening process, the rubber sleeve 8 in the groove 6 is compressed and undergoes elastic deformation, which not only acts as an elastic washer for the screw 7 and nut 9, providing cushioning and preventing loosening, but also further enhances the sealing of the connection. After confirming that all screws 7 and nuts 9 are screwed in, remove the rubber cover 11, which was originally fixed in the receiving groove 10 on the outer annular surface of the connecting plate 1, from the receiving groove 10. Carefully put the removed rubber cover 11 onto the flange 4, ensuring that the rubber cover 11 completely covers the screw 7 and nut 9. Put the rubber ring 12 on the connection between the liquefied natural gas pipe 3 and the flange 4, so that the rubber cover 11 is fixed in the appropriate position by the rubber ring 12. At this time, the rubber cover 11 provides a protective wrapping effect for the screw 7 and nut 9, effectively reducing the corrosion of the screw 7 and nut 9 by external moisture and extending the service life of the connector. Conduct a comprehensive inspection of the entire installation area, checking whether the connection between the connecting plate 1 and the liquefied natural gas pipe 3 is tight, whether the insertion of the insertion pipe 2 is normal, and whether there are any signs of loosening or leakage. Check whether the connection between the screw 7 and the nut 9 is secure, whether the rubber sleeve 8 is properly secured in the groove 6, whether the rubber cover 11 completely covers the screw 7 and the nut 9, and whether the rubber ring 12 is tightly fitted at the connection between the liquefied natural gas pipe 3 and the flange 4.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A liquefied natural gas pipeline installation positioning assembly, comprising a connecting disc (1) installed between two liquefied natural gas pipes (3), the end of the liquefied natural gas pipes (3) being fixed with a flange (4), characterized in that: Multiple screws (7) are fixed on both sides of the connecting plate (1). A rubber sleeve (8) is fitted on the body of the screw (7). A nut (9) is screwed to one end of the screw (7). A rubber cover (11) is provided on the outer ring surface of the connecting plate (1). The rubber cover (11) wraps around the outside of the flange (4).

2. A LNG pipeline installation positioning assembly according to claim 1, characterized in that: The inner ring of the connecting plate (1) is integrally formed with a tube (2). The tube (2) has two sections. The two sections of the tube (2) are symmetrically distributed about the inner ring opening of the connecting plate (1), and the two sections of the tube (2) are respectively inserted into two liquefied natural gas pipes (3).

3. A LNG pipeline installation positioning assembly according to claim 1, characterized in that: The flange (4) has multiple bolt holes (5) on its surface. A groove (6) is provided at the end of the bolt hole (5) away from the connecting plate (1). The groove (6) is an arc-shaped groove. The diameter of the groove (6) at the end away from the bolt hole (5) is larger than the diameter of the bolt hole (5).

4. A LNG pipeline installation positioning assembly according to claim 3, wherein: One end of the rubber sleeve (8) is inserted into the slot (6), and the other end of the rubber sleeve (8) extends out of the slot (6). After the nut (9) and the screw (7) are screwed and locked, the rubber sleeve (8) can produce elastic deformation while being clamped in the slot (6).

5. A LNG pipeline installation positioning assembly according to claim 1, characterized in that: The outer ring surface of the connecting plate (1) is provided with a receiving groove (10), which is an annular groove. One end of the rubber cover (11) is fixedly fitted in the receiving groove (10), and the other end of the rubber cover (11) is fixed with a rubber ring (12). The rubber ring (12) is fitted at the connection between the liquefied natural gas pipe (3) and the flange (4).

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