External pipe orifice connecting structure of LNG (Liquefied Natural Gas) filling device
By installing double-socket pipe clamps and clamp structures on the external pipeline of the LNG refueling unit, pressure testing before the equipment leaves the factory is realized, which solves the problems of loose connection and easy leakage and difficult testing in the existing technology, reduces the rectification cost and improves the stability and safety of the connection.
Patent Information
- Application Number
- CN202520404949.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-10
AI Technical Summary
The existing external pipe connection methods for LNG refueling units have problems such as high welding costs, high material costs, high labor time, easy leakage due to loose connections, and inability to test the equipment before it leaves the factory.
The system adopts a double-socket pipe clamp and clamp structure. The test fixture is sealed by the double-socket pipe clamp, and the external pipeline is tightened on the test fixture by the clamp to realize the pressure test before the equipment leaves the factory.
It reduces rectification costs, improves the stability and safety of connections, reduces leakage risks, simplifies construction, and facilitates pre-shipment testing.
Smart Images
Figure CN223895373U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to LNG filling equipment technical field, specifically, relate to a LNG filling device external pipe orifice connecting structure. BACKGROUND
[0002] Liquefied natural gas (LNG) filling device is the mature LNG filling equipment currently, has unloading, pressurization, temperature adjustment, filling and many other functions, because its function is more, external pipe orifice is numerous, the conventional connecting mode of external pipe orifice currently mainly has two.
[0003] The first is flange connection, and the flange connection currently all adopts the butt welding flange with the neck of the protruding surface, and the problems of this kind of process mainly include: first, the butt welding process all needs to carry out the radiographic inspection, because the field condition is poor, and the welding requirement is also high, so the welding cost is higher;Second, because the reserved pipe orifice is more, the material cost usage of the matched flange and bolt assembly and other materials is large, so the material cost is higher;Third, the worker still needs to fasten the two flanges after welding the flanges, and the working hours are high;Fourth, the flange connection has the problem of not strict sealing of the joint surface, and the long-time running vibration can cause the risk of LNG leakage.
[0004] The second is not to set the flange, and directly reserve the bare pipe, and the problems of the reserved bare pipe mainly include: first, if only the bare pipe of the external pipe orifice, the equipment cannot be normally debugged separately, and can only be sent to the field, and after connecting with the whole station pipeline, the equipment can be debugged and tested, so that the problems of the equipment before leaving the factory cannot be exposed, and if the problems are found after the field debugging in the station, the rectification cost is higher;Second, if the equipment wants to be debugged before leaving the factory, only the hard connection with the debugging tool in the factory can be carried out, that is, direct welding, and after debugging, the equipment is separated from the equipment in the factory by cutting, although the debugging in the factory can be carried out by the cutting mode, the cutting after debugging will inevitably cause secondary pollution to the pipeline, and the cutting is formed manually, so that the overall appearance of the equipment is affected. UTILITY MODEL CONTENTS
[0005] The utility model aims at providing a LNG filling device external pipe orifice connecting structure to solve the problems of high welding cost, high material cost, high working hours, easy leakage of not strict connection and undetectable problems before leaving the factory in the prior art.
[0006] The embodiment of the utility model is implemented as follows:
[0007] The utility model embodiment provides a LNG filling device external pipe orifice connecting structure, which comprises an external pipeline,
[0008] The connecting end of the external pipeline is provided with a double-socket pipe clamp, and one end of the external pipeline close to the double-socket pipe clamp is welded to the double-socket pipe clamp.
[0009] The outer wall of the external pipeline is clamped with a clamp, the clamp abuts against the double-socket pipe clamp, one end of the clamp is tightly clamped on the external pipeline, and the other end of the clamp is bolted to the test tool.
[0010] In use, first, the external pipeline is aligned with the axis of the test tool, then the double-socket pipe clamp of the external pipeline is sleeved on the connecting end of the test tool, the double-socket pipe clamp connection is sealed, finally, one end of the clamp is fastened on the outer wall of the external pipeline and abuts against the double-socket pipe clamp, and the other end of the clamp is bolted to the test tool. By tightening the bolts on the clamp, the external pipeline is tightly connected to the test tool, thereby facilitating pre-shipment pressure testing and facilitating disassembly after pressure testing.
[0011] The external pipeline of the LNG filling device is clamped with a clamp, the clamp abuts against the double-socket pipe clamp, one end of the clamp is tightly clamped on the external pipeline, and the other end of the clamp is bolted to the test tool. By tightening the bolts on the clamp, the external pipeline is tightly connected to the test tool, thereby facilitating pre-shipment pressure testing and facilitating disassembly after pressure testing.
[0012] Optionally, the inner wall of the double-socket pipe clamp has an annular protrusion, the two sides of the annular protrusion have a first connecting cavity and a second connecting cavity respectively, and the annular protrusion, the first connecting cavity and the second connecting cavity are located on the same axis and are mutually penetrated.
[0013] The end of the external pipeline close to the double-socket pipe clamp is fixedly connected to the first connecting cavity and tightly abuts against the end of the annular protrusion close to the first connecting cavity.
[0014] In this way, the annular protrusion causes the internal part of the double-socket pipe clamp to be arranged in a stepped manner, facilitating pipeline connection of the external pipeline through the double-socket pipe clamp, and greatly reducing the difficulty of on-site construction.
[0015] Optionally, the clamp has a first arc-shaped clamp plate and a second arc-shaped clamp plate, the first arc-shaped clamp plate and the second arc-shaped clamp plate are symmetrically distributed, and the side of the first arc-shaped clamp plate and the second arc-shaped clamp plate close to the double-socket pipe clamp abuts against the double-socket pipe clamp.
[0016] In this way, the clamp can enclose the external pipeline, so that the clamp can be stably clamped on the external pipeline, thereby making the connection of the external pipeline and the test tool more stable, improving the safety of liquid transmission, and facilitating the bearing of larger pressure.
[0017] Optionally, the first arc-shaped hoop plate and the second arc-shaped hoop plate are provided with wing plates, the first arc-shaped hoop plate is detachably connected to the second arc-shaped hoop plate through the first bolts between the wing plates of the first arc-shaped hoop plate and the second arc-shaped hoop plate.
[0018] In this way, the first arc-shaped hoop plate and the second arc-shaped hoop plate are connected to each other through the first bolts, which is beneficial to clamping or loosening the outer connecting pipe by the first arc-shaped hoop plate and the second arc-shaped hoop plate, and the disassembly and assembly are convenient, and the working efficiency is improved.
[0019] Optionally, the first arc-shaped hoop plate and the second arc-shaped hoop plate are provided with a plurality of second bolts, one end of the plurality of second bolts is bolted to the first arc-shaped hoop plate or the second arc-shaped hoop plate, and the other end of the plurality of second bolts is bolted to the test tool.
[0020] In this way, by tightening the plurality of second bolts, the outer connecting pipeline and the test tool are tightly connected to each other, which is beneficial to the pressure test before delivery, timely discovery of problems, and reduction of rectification cost.
[0021] Optionally, both ends of the plurality of second bolts are provided with gaskets, and the outer sides of the gaskets are provided with nuts.
[0022] In this way, the gaskets can protect the first arc-shaped hoop plate, the second arc-shaped hoop plate, and the test tool from being worn out, effectively avoid the loosening of the nuts, and further avoid affecting the sealing performance and structural strength of the connection between the outer connecting pipeline and the test tool.
[0023] Optionally, the annular protrusion is provided with a sealing gasket at one end close to the second connecting cavity, and the connecting part of the test tool is inserted into the second connecting cavity and tightly abuts against the sealing gasket.
[0024] In this way, the sealing gasket can ensure the sealing performance of the test tool inserted into the second connecting cavity, improve the sealing performance of the double-socket pipe hoop, and be beneficial to the pressure test before delivery, timely discovery of problems, and reduction of rectification cost.
[0025] Optionally, the test tool is provided with a first flange plate at one end close to the outer connecting pipeline, and the other end of the plurality of second bolts is bolted to the first flange plate.
[0026] In this way, by tightening the plurality of second bolts, the outer connecting pipeline and the test tool are tightly connected to each other, the pressure strength of the connection between the outer connecting pipeline and the test tool is improved, which is beneficial to the pressure test before delivery, timely discovery of problems, and reduction of rectification cost.
[0027] Optionally, the connecting end of the test tool has a tapered head, and the sealing gasket is attached to the tapered head.
[0028] In this way, the tapered head facilitates the insertion of the connecting end of the test tool into the second connecting cavity, and when the tapered head is in extrusion contact with the annular protrusion, the sealing gasket is deformed to attach to the tapered head, thereby improving the sealing performance of the mutual connection between the test tool and the double-socket pipe clamp.
[0029] Optionally, the test tool has a second flange plate at the end away from the external pipeline.
[0030] In this way, the second flange plate facilitates the connection with the debugging equipment in the factory, and facilitates the disassembly and assembly.
[0031] In summary, the LNG filling device external pipeline connection structure has the advantages of simple structure, strong applicability, low cost, low labor, low leakage at the connection, and convenient detection before the equipment is shipped. BRIEF DESCRIPTION OF DRAWINGS
[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.
[0033] Figure 1 FIG. 1 is a structural schematic diagram of an LNG filling device external pipeline connection structure according to an embodiment of the present application;
[0034] Figure 2 FIG. 2 is a structural schematic diagram of an external pipeline according to an embodiment of the present application.
[0035] Legend: 1-external pipeline, 2-double-socket pipe clamp, 3-clip, 4-test tool, 5-annular protrusion, 6-first connecting cavity, 7-second connecting cavity, 8-first arc-shaped clamp plate, 9-second arc-shaped clamp plate, 10-wing plate, 11-first bolt, 12-second bolt, 13-gasket, 14-nut, 15-sealing gasket, 16-first flange plate, 17-tapered head, 18-second flange plate. DETAILED DESCRIPTION
[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings in the embodiments of the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.
[0037] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.
[0038] Embodiments
[0039] Referring to Figure 1 and Figure 2 The present embodiment proposes a LNG filling device external pipe port connecting structure, which comprises an external pipe 1;
[0040] The connecting end of the external pipe 1 is provided with a double socket pipe clamp 2, and the end of the external pipe 1 close to the double socket pipe clamp 2 is welded to the double socket pipe clamp 2.
[0041] A clamp 3 is clamped on the outer wall of the external pipe 1, the clamp 3 abuts against the double socket pipe clamp 2, one end of the clamp 3 is tightly clamped on the external pipe 1, and the other end of the clamp 3 is bolted to a test tool 4.
[0042] In use, first, the external pipe 1 is aligned with the axis of the test tool 4, then the double socket pipe clamp 2 of the external pipe 1 is sleeved on the connecting end of the test tool 4, the double socket pipe clamp 2 connection realizes sealing, finally, one end of the clamp 3 is fastened on the outer wall of the external pipe 1 and abuts against the double socket pipe clamp 2, the other end of the clamp 3 is bolted to the test tool 4, by tightening the bolts on the clamp 3, the external pipe 1 is tightly connected on the test tool 4, thereby realizing pre-shipment pressure test, and facilitating disassembly after pressure test.
[0043] The LNG filling device external pipe port connecting structure disclosed in the present embodiment is provided with a double socket pipe clamp 2 on the external pipe 1, the test tool 4 is connected by the double socket pipe clamp 2, the external pipe 1 is pulled tightly on the test tool 4 by the clamp 3, which facilitates pre-shipment pressure test of the equipment, timely discovery of problems, reduction of rectification cost, and further beneficial effects of simple structure, strong applicability, low cost, low working hours, non-leakage at the connection and convenient detection before the equipment is shipped.
[0044] Referring toFigure 1 and Figure 2 The inner wall of the double-socket pipe clamp 2 has an annular protrusion 5, the two sides of the annular protrusion 5 have a first connecting cavity 6 and a second connecting cavity 7 respectively, and the annular protrusion 5, the first connecting cavity 6 and the second connecting cavity 7 are located on the same axis and are mutually penetrated;
[0045] The outer connecting pipeline 1 is fixedly connected to the first connecting cavity 6 and tightly abuts against one end of the annular protrusion 5 close to the first connecting cavity 6. The annular protrusion 5 makes the inside of the double-socket pipe clamp 2 present a stepped arrangement, which facilitates the pipeline connection of the outer connecting pipeline 1 through the double-socket pipe clamp 2, and greatly reduces the difficulty of on-site construction.
[0046] The clamp 3 has a first arc-shaped clamp plate 8 and a second arc-shaped clamp plate 9, which are symmetrically distributed. The first arc-shaped clamp plate 8 and the second arc-shaped clamp plate 9 abut against the double-socket pipe clamp 2 on the side close to the double-socket pipe clamp 2. In this way, the clamp 3 can embrace the outer connecting pipeline 1, so that the clamp 3 can be stably clamped on the outer connecting pipeline 1, and the connection between the outer connecting pipeline 1 and the test tool 4 is more stable, which improves the safety of liquid transmission and facilitates the bearing of large pressure.
[0047] The first arc-shaped clamp plate 8 and the second arc-shaped clamp plate 9 each have a wing plate 10. The first arc-shaped clamp plate 8 is detachably connected to the second arc-shaped clamp plate 9 through a first bolt 11 between the wing plate 10 of the first arc-shaped clamp plate 8 and the wing plate 10 of the second arc-shaped clamp plate 9. In this way, the first arc-shaped clamp plate 8 and the second arc-shaped clamp plate 9 are connected to each other by the first bolt 11, which is conducive to clamping or loosening the outer connecting pipeline by the first arc-shaped clamp plate 8 and the second arc-shaped clamp plate 9, and realizes convenient disassembly and assembly, and improves work efficiency.
[0048] The first arc-shaped clamp plate 8 and the second arc-shaped clamp plate 9 are provided with a plurality of second bolts 12. One end of the plurality of second bolts 12 is bolted to the first arc-shaped clamp plate 8 or the second arc-shaped clamp plate 9, and the other end of the plurality of second bolts 12 is bolted to the test tool 4. By tightening the plurality of second bolts 12, the outer connecting pipeline 1 and the test tool 4 are closely connected to each other, which is conducive to pressure test before shipment, timely discovery of problems and reduction of rectification cost.
[0049] The plurality of second bolts 12 each have a gasket 13 at both ends, and the outer side of the gasket 13 has a nut 14. The gasket 13 can protect the first arc-shaped clamp plate 8, the second arc-shaped clamp plate 9 and the test tool 4 from being worn, effectively avoid the loosening of the nut 14, and further avoid affecting the sealing performance and structural strength of the mutual connection between the outer connecting pipeline 1 and the test tool 4.
[0050] Referring to Figure 1 and Figure 2The annular protrusion 5 is provided with a sealing gasket 15 near one end of the second connecting cavity 7. The connecting part of the test tool 4 is inserted into the second connecting cavity 7 and tightly abuts against the sealing gasket 15. The sealing gasket 15 can ensure that the test tool 4 is inserted into the second connecting cavity 7 to achieve sealing, improve the sealing performance of the double-socket pipe clamp 2, facilitate the pressure test detection before delivery, find problems in time, and reduce the rectification cost.
[0051] The test tool 4 is provided with a first flange plate 16 near one end of the outer connecting pipeline 1. The other ends of the second bolts 12 are bolted to the first flange plate 16. By tightening the second bolts 12, the outer connecting pipeline 1 and the test tool 4 are tightly connected to each other, the pressure strength of the connecting part of the outer connecting pipeline 1 and the test tool 4 is improved, the pressure test detection before delivery is facilitated, problems are found in time, and the rectification cost is reduced.
[0052] The connecting end of the test tool 4 is provided with a conical head 17. The sealing gasket 15 is attached to the conical head 17. The conical head 17 is arranged to facilitate the insertion of the connecting part of the test tool 4 into the second connecting cavity 7. When the conical head 17 is in extrusion contact with the annular protrusion 5, the sealing gasket 15 is deformed and attached to the conical head 17. This is conducive to improving the sealing performance of the connecting part of the test tool 4 and the double-socket pipe clamp 2.
[0053] The test tool 4 is provided with a second flange plate 18 away from the outer connecting pipeline 1. The second flange plate 18 is convenient for connecting the debugging equipment in the factory and is convenient for disassembly and assembly.
[0054] Referring to Figure 1 and Figure 2 In the embodiment, the double-socket pipe clamp 2 is arranged to reduce the material cost by about 70%, which has very high economic benefits.
[0055] Referring to Figure 1 and Figure 2 In the embodiment, the LNG filling device outer connecting pipeline connecting structure is suitable for a liquefied natural gas (LNG) filling device or other LNG filling equipment with a design pressure lower than 2.5 MPa.
[0056] Referring to Figure 1 and Figure 2In the embodiment, the specific use steps of the LNG filling device external pipe port connecting structure are as follows: firstly, the first arc-shaped hoop plate 8 and the second arc-shaped hoop plate 9 are clamped on the external pipe 1 by the first bolt 11, and the first arc-shaped hoop plate 8 and the second arc-shaped hoop plate 9 abut against the double socket pipe hoop 2; secondly, the first arc-shaped hoop plate 8 and the second arc-shaped hoop plate 9 are detachably connected to the first flange plate 16 by the second bolt 12, the insertion end of the test tool 4 is inserted into the second connecting cavity 7 of the double socket pipe hoop 2 and abuts against the sealing washer 15; then, the first bolt 11 is tightened to tightly clamp the first arc-shaped hoop plate 8 and the second arc-shaped hoop plate 9 on the external pipe 1, the external pipe 1 is tightly close to the test tool 4 by rotating the nut 14 on the second bolt 12, the sealing washer 15 is deformed to realize sealing by the extrusion of the conical head 17; finally, the in-plant equipment is connected to the second flange plate 18, so that the equipment can be pressure tested before leaving the factory, problems can be found and solved, the overall applicability is high, the connection is not easy to leak, and the equipment is convenient to disassemble and assemble.
[0057] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. The present application can be changed and modified in various ways by those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. An external pipe connection structure for an LNG refueling device, characterized in that: Including external pipelines (1); The connection end of the external pipeline (1) is provided with a double-socket pipe clamp (2), and the end of the external pipeline (1) near the double-socket pipe clamp (2) is welded to the double-socket pipe clamp (2); A clamp (3) is held on the outer wall of the external pipeline (1). The clamp (3) abuts against the double-socket pipe clamp (2). One end of the clamp (3) is tightly clamped on the external pipeline (1), and the other end of the clamp (3) is bolted to the test fixture (4).
2. The external pipe connection structure of an LNG refueling device according to claim 1, characterized in that: The inner wall of the double-socket pipe clamp (2) has an annular protrusion (5), and the two sides of the annular protrusion (5) have a first connecting cavity (6) and a second connecting cavity (7) respectively. The annular protrusion (5), the first connecting cavity (6) and the second connecting cavity (7) are all located on the same axis and are interconnected with each other. The end of the external pipe (1) near the double-socket clamp (2) is welded to the first connecting cavity (6) and tightly abuts against the end of the annular protrusion (5) near the first connecting cavity (6).
3. The external pipe connection structure of an LNG refueling device according to claim 1, characterized in that: The clamp (3) has a first arc-shaped clamp plate (8) and a second arc-shaped clamp plate (9). The first arc-shaped clamp plate (8) and the second arc-shaped clamp plate (9) are symmetrically distributed. The side of the first arc-shaped clamp plate (8) and the second arc-shaped clamp plate (9) close to the double-socket pipe clamp (2) both abut against the double-socket pipe clamp (2).
4. The external pipe connection structure of an LNG refueling device according to claim 3, characterized in that: Both the first arc-shaped hoop (8) and the second arc-shaped hoop (9) have wing plates (10). A first bolt (11) is provided between the wing plate (10) of the first arc-shaped hoop (8) and the wing plate (10) of the second arc-shaped hoop (9). The first arc-shaped hoop (8) is detachably connected to the second arc-shaped hoop (9) by the first bolt (11).
5. The external pipe connection structure of an LNG refueling device according to claim 3, characterized in that: The first arc-shaped hoop (8) and the second arc-shaped hoop (9) are provided with a plurality of second bolts (12), one end of the plurality of second bolts (12) is bolted to the first arc-shaped hoop (8) or the second arc-shaped hoop (9), and the other end of the plurality of second bolts (12) is bolted to the test fixture (4).
6. The external pipe connection structure of an LNG refueling device according to claim 5, characterized in that: Each of the second bolts (12) has a washer (13) at both ends, and each washer (13) has a nut (14) on its outer side.
7. The external pipe connection structure of an LNG refueling device according to claim 2, characterized in that: The annular protrusion (5) is provided with a sealing gasket (15) at one end near the second connecting cavity (7). The connecting part of the test fixture (4) is inserted into the second connecting cavity (7) and tightly abuts against the sealing gasket (15).
8. The external pipe connection structure of an LNG refueling device according to claim 5, characterized in that: The test fixture (4) has a first flange (16) at one end near the external pipeline (1), and the other ends of several second bolts (12) are bolted to the first flange (16).
9. The external pipe connection structure of an LNG refueling device according to claim 7, characterized in that: The test fixture (4) has a tapered head (17) at the connection end, and the sealing gasket (15) fits into the tapered head (17).
10. The external pipe connection structure of an LNG refueling device according to claim 1, characterized in that: The test fixture (4) has a second flange (18) at the end away from the external pipeline (1).