Double-layer methanol high-pressure fuel pipe joint

Abstract

The utility model discloses a double-layer methanol high-pressure fuel pipe joint, relates to a fuel pipe, and solves the technical problem that an existing methanol fuel conveying channel joint is not easy to mount and dismount. Comprising a first inner pipe butt joint part and a second inner pipe butt joint part, and further comprises a female head sleeve and a male head sleeve, the female head sleeve is detachably installed on a first outer pipe through a first thread sealing structure, the male head sleeve is detachably installed on a second outer pipe through a second thread sealing structure, and the female head sleeve is in threaded connection with the male head sleeve. A first interference part is arranged between the female head sleeve and the butt joint part of the first inner pipe, a second interference part is arranged between the male head sleeve and the butt joint part of the second inner pipe, and the butt joint position of the butt joint part of the first inner pipe and the butt joint position of the second inner pipe are in extrusion type sealing connection. According to the utility model, the situations of personnel poisoning, equipment corrosion, fire hazard and explosion caused by methanol fuel leakage can be avoided.

Description

Technical Field

[0001] This utility model relates to fuel pipes, and more specifically, to a double-layer methanol high-pressure fuel pipe connector. Background Technology

[0002] Methanol fuel is a new type of clean fuel produced by blending industrial methanol or fuel methanol with denatured alcohol additives and existing standard gasoline and diesel (or component oils) in a specific volume (or weight ratio) using a strict scientific process. It can replace gasoline and diesel in various motor vehicles and stoves. The raw materials for methanol production are mainly coal, natural gas, coalbed methane, and coke oven gas. In particular, utilizing high-sulfur, low-quality coal and coke oven gas to produce methanol can improve resource utilization and reduce environmental pollution. Developing coal-to-methanol fuel to supplement and partially replace petroleum fuels is an effective shortcut to alleviate my country's energy shortage, improve resource utilization, and protect the ecological environment.

[0003] For the safety of marine engines, double-walled pipes are usually used to transport methanol fuel. When the double-walled pipe is not long enough or breaks, flanges (double O-rings) are used to weld the two ends of the double-walled pipe together, but this method is not easy to install and disassemble. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a double-layer methanol high-pressure fuel pipe joint to address the shortcomings of the existing technology, thereby solving the technical problem that the joints of the existing methanol fuel transportation channels are not easy to install and disassemble.

[0005] The present invention discloses a double-layer methanol high-pressure fuel pipe connector, comprising a first inner pipe mating part and a second inner pipe mating part, and further comprising a female sleeve and a male sleeve. The female sleeve is detachably installed on the first outer pipe through a first threaded sealing structure, and the male sleeve is detachably installed on the second outer pipe through a second threaded sealing structure. The female sleeve and the male sleeve are threadedly connected, and a first interference part is provided between the female sleeve and the first inner pipe mating part, and a second interference part is provided between the male sleeve and the second inner pipe mating part. The mating point of the first inner pipe mating part and the second inner pipe mating part is a compression-type sealing connection.

[0006] As a further improvement, the first threaded sealing structure includes a first fixing ring, a first limiting ring fixedly installed on the first outer tube, the first outer tube of the double-layer methanol high-pressure fuel pipe inserted into the female head sleeve, the first fixing ring sleeved on the first outer tube, and the first limiting ring located in the first fixing ring, one end of the first fixing ring is provided with a first interference ring body for limiting the first limiting ring, one end of the female head sleeve is provided with a first external thread, the first fixing ring is provided with a second internal thread matching the first external thread, and the female head sleeve is threadedly connected to the first fixing ring.

[0007] Furthermore, a first sealing ring is installed between the first limiting ring and the end face of the female sleeve.

[0008] Furthermore, the second threaded sealing structure includes a second fixing ring, a second limiting ring fixedly installed on the second outer tube, the second outer tube of the double-layer methanol high-pressure fuel pipe being inserted into the male sleeve, the second fixing ring being sleeved on the second outer tube, and the second limiting ring being located in the second fixing ring, one end of the second fixing ring being provided with a second interference ring body for limiting the second limiting ring, the other end of the female sleeve being provided with a first internal thread, one end of the male sleeve being provided with a second external thread matching the first internal thread, and the male sleeve being threadedly connected to the female sleeve.

[0009] Furthermore, the other end of the male sleeve is provided with a third external thread, and the second fixing ring is provided with a third internal thread that matches the third external thread. The second fixing ring is threadedly connected to the male sleeve.

[0010] Furthermore, a third sealing ring is installed between the second fixing ring and the male sleeve.

[0011] Furthermore, the male sleeve is provided with a sealing ring mounting groove, and a second sealing ring is installed in the sealing ring mounting groove.

[0012] Furthermore, the male end sleeve is provided with a shoulder.

[0013] Furthermore, the female sleeve has an inner cavity, the mating point is located in the inner cavity, and the periphery of the mating point forms an annular gap. The extension portion of the first inner tube has a first through hole, and the extension portion of the second inner tube has a second through hole.

[0014] The annular gap, the first through hole, the second through hole, the first gap between the first outer tube and the first inner tube, and the second gap between the second outer tube and the second inner tube are all connected. The first gap, the first through hole, the annular gap, the second through hole and the second gap together constitute an inerting gas channel.

[0015] Beneficial effects

[0016] The advantages of this utility model are:

[0017] 1. This utility model is provided with a female sleeve and a male sleeve. The female sleeve is detachably installed on the first outer tube through a first threaded sealing structure, and the male sleeve is detachably installed on the second outer tube through a second threaded sealing structure. The female sleeve and the male sleeve are detachably connected, and the connection between the female sleeve and the male sleeve forms an inner cavity. The mating part is set in the inner cavity, thereby realizing the sealed connection of the double-layer pipe, improving the installation flexibility of the double-layer pipe joint, and reducing the space utilization rate of the existing direct flange welding of double-layer pipes.

[0018] 2. This utility model provides an inert gas channel between the female sleeve, male sleeve, first inner tube, first outer tube, second outer tube, and second inner tube, allowing inert gas to be introduced to achieve the purpose of safely transporting methanol fuel, thus avoiding situations such as personnel poisoning, equipment corrosion, fire, and explosion caused by methanol fuel leakage. Attached Figure Description

[0019] Figure 1 This is a perspective view of the double-layer methanol high-pressure fuel pipe connector of this utility model;

[0020] Figure 2 This is a side view of the double-layer methanol high-pressure fuel pipe connector of this utility model.

[0021] Figure 3 for Figure 2 Cross-sectional view along direction B;

[0022] Figure 4 for Figure 2 Cross-sectional view along direction A;

[0023] Figure 5 for Figure 4 Enlarged view of point D in the middle;

[0024] Figure 6 for Figure 4 Enlarged view of point E in the middle.

[0025] Wherein: 1-First inner tube mating part, 2-First outer tube, 3-First fixing ring, 4-First sealing ring, 5-Second sealing ring, 6-Female sleeve, 7-Male sleeve, 8-Mating point, 9-Annular gap, 10-Second outer tube, 11-Second inner tube mating part, 12-Second fixing ring, 13-First through hole, 14-Second through hole, 15-Third sealing ring, 16-Shoulder, 17-First limiting ring, 18-Second limiting ring, 19-First interference part, 20-Second interference part, 21-First interference ring body, 22-Second interference ring body, 23-First inner tube, 24-Second inner tube. Detailed Implementation

[0026] The present invention will be further described below with reference to embodiments, but this does not constitute any limitation on the present invention. Any limited modifications made by any person within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0027] See Figures 1-6This utility model discloses a double-layer methanol high-pressure fuel pipe connector, comprising a first inner pipe mating part 1 and a second inner pipe mating part 11. Its characteristic is that it further includes a female sleeve 6 and a male sleeve 7. The female sleeve 6 is detachably mounted on the first outer pipe 2 via a first threaded sealing structure, and the male sleeve 7 is detachably mounted on the second outer pipe 10 via a second threaded sealing structure. The female sleeve 6 and the male sleeve 7 are threadedly connected. Figure 3 As shown, a first interference portion 19 is provided between the female sleeve 6 and the first inner tube docking portion 1, and a second interference portion 20 is provided between the male sleeve 7 and the second inner tube docking portion 11. The docking point 8 of the first inner tube docking portion 1 and the second inner tube docking portion 11 is a compression-type sealing connection.

[0028] like Figure 4 As shown, the double-layer methanol high-pressure fuel pipe includes a first inner pipe 23, a first outer pipe 2, a second inner pipe 24, and a second outer pipe 10. A first gap exists between the first inner pipe 23 and the first outer pipe 2, and a second gap exists between the second inner pipe 24 and the second outer pipe 10. The first inner pipe 23 and the second inner pipe 24 carry methanol fuel (methanol is toxic), and the inner pipes can withstand pressures of 1000-2000 bar. The first outer pipe 2 and the second outer pipe 10 can withstand pressures of 10-20 bar.

[0029] The female sleeve 6 has an inner cavity, the docking point 8 is located in the inner cavity, and the outer periphery of the docking point 8 forms an annular gap 9. The first inner tube docking part 1 has a first through hole 13 for gas flow, and the second inner tube docking part 11 has a second through hole 14 for gas flow.

[0030] The annular gap 9, the first through hole 13, the second through hole 14, the first gap between the first outer tube 2 and the first inner tube 23, and the second gap between the second outer tube 10 and the second inner tube 24 are all interconnected. The first gap, the first through hole 13, the annular gap 9, the second through hole 14, and the second outer tube 10 together constitute an inerting gas channel. The inerting gas channel is used to fill inerting gas to prevent methanol from the inner layer from flowing into the atmosphere in the event of leakage from the inner tube or joint.

[0031] like Figure 6 As shown, the first threaded sealing structure includes a first fixing ring 3, a first limiting ring 17 fixedly installed on the first outer tube 2, the first outer tube 2 of the double-layer methanol high-pressure fuel pipe being inserted into the female head sleeve 6, the first fixing ring 3 being sleeved on the first outer tube 2, and the first limiting ring 17 being located within the first fixing ring 3, one end of the first fixing ring 3 having a first interference ring body 21 for limiting the first limiting ring 17, one end of the female head sleeve 6 having a first external thread, and the first fixing ring 3 having a second internal thread matching the first external thread, the female head sleeve 6 being threadedly connected to the first fixing ring 3. The first fixing ring 3 and the female head sleeve 6 are installed on the first outer tube 2, achieving the clamping of the first limiting ring 17 by the female head sleeve 6 and the first fixing ring 3.

[0032] A first sealing ring 4 is installed between the first limiting ring 17 and the end face of the female sleeve 6. The first sealing ring 4 is installed between the first limiting ring 17 and the end face of the female sleeve 6 to fill the gap between the threads and prevent methanol leakage.

[0033] like Figure 5 As shown, the second threaded sealing structure includes a second fixing ring 12, a second limiting ring 18 fixedly installed on the second outer tube 10, the second outer tube 10 of the double-layer methanol high-pressure fuel pipe is inserted into the male sleeve 7, the second fixing ring 12 is sleeved on the second outer tube 10, and the second limiting ring 18 is located in the second fixing ring 12. One end of the second fixing ring 12 is provided with a second interference ring body 22 for limiting the second limiting ring 18. The other end of the female sleeve 6 is provided with a first internal thread, and one end of the male sleeve 7 is provided with a second external thread that matches the first internal thread. The male sleeve 7 and the female sleeve 6 are threadedly connected.

[0034] The other end of the male sleeve 7 is provided with a third external thread, and the second fixing ring 12 is provided with a third internal thread that matches the third external thread. The second fixing ring 12 is threadedly connected to the male sleeve 7, thereby clamping the second fixing ring 12 and the male sleeve 7 onto the second limiting ring 22, thus enabling the second fixing ring 12 and the male sleeve 7 to be installed on the second outer tube 10.

[0035] The male sleeve 7 is provided with a shoulder 16, which is used to limit the axial displacement of the threads of the male sleeve 7 and the female sleeve 6, preventing thread damage or seal failure caused by over-tightening. A third sealing ring 15 is installed between the second limiting ring 18 and the end face of the male sleeve 7. The third sealing ring 15 is provided to fill the gap between the threads and prevent methanol leakage.

[0036] A sealing ring mounting groove is provided at the connection between the female sleeve 6 and the male sleeve 7, and a second sealing ring 5 is provided in the sealing ring mounting groove. The second sealing ring 5 seals the connection between the female sleeve 6 and the male sleeve 7 to further prevent methanol leakage.

[0037] The working principle of this utility model is as follows: Before transporting methanol fuel, inert gas is introduced into the inert gas channel so that the first gap, the first through hole 13, the annular gap 9, the second through hole 14, and the second outer pipe 10 are all filled with inert gas, thereby preventing methanol leaking from the inner layer from flowing into the atmosphere during methanol fuel transportation.

[0038] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present utility model. These modifications and improvements will not affect the effectiveness of the present utility model or the practicality of the patent.

Claims

1. A double-layered methanol high-pressure fuel pipe joint comprising a first inner pipe butt portion (1) and a second inner pipe butt portion (11), characterized in that, It also includes a female head sleeve (6) and a male head sleeve (7), the female head sleeve (6) is detachably mounted on the first outer tube (2) through the first threaded sealing structure, the male head sleeve (7) is detachably mounted on the second outer tube (10) through the second threaded sealing structure, the female head sleeve (6) is threadedly connected with the male head sleeve (7), and the female head sleeve (6) is provided with a first interference part (19) between the first inner tube butt joint part (1), the male head sleeve (7) is provided with a second interference part (20) between the second inner tube butt joint part (11), and the butt joint part (8) of the first inner tube butt joint part (1) and the second inner tube butt joint part (11) is a extrusion type sealing connection.

2. A double-walled methanol high-pressure fuel pipe joint according to claim 1, characterized in that The first threaded sealing structure includes a first fixed ring (3), the first outer tube (2) is fixedly installed with a first limiting ring (17), the first outer tube (2) of the double-layer methanol high-pressure fuel pipe is inserted into the female head sleeve (6), the first fixed ring (3) is sleeved on the first outer tube (2), and the first limiting ring (17) is located in the first fixed ring (3), one end of the first fixed ring (3) is provided with a first interference ring body (21) for limiting the first limiting ring (17), one end of the female head sleeve (6) is provided with a first outer thread, the first fixed ring (3) is provided with a second inner thread matched with the first outer thread, and the female head sleeve (6) is threadedly connected with the first fixed ring (3).

3. A double-walled methanol high-pressure fuel pipe joint according to claim 2, characterized in that The first limiting ring (17) and the female head sleeve (6) are provided with a first sealing ring (4) between end faces.

4. A double-walled methanol high-pressure fuel pipe joint according to claim 1, characterized in that The second threaded sealing structure includes a second fixed ring (12), the second outer tube (10) is fixedly installed with a second limiting ring (18), the second outer tube (10) of the double-layer methanol high-pressure fuel pipe is inserted into the male head sleeve (7), the second fixed ring (12) is sleeved on the second outer tube (10), and the second limiting ring (18) is located in the second fixed ring (12), one end of the second fixed ring (12) is provided with a second interference ring body (22) for limiting the second limiting ring (18), the other end of the female head sleeve (6) is provided with a first inner thread, one end of the male head sleeve (7) is provided with a second outer thread matched with the first inner thread, and the male head sleeve (7) is threadedly connected with the female head sleeve (6).

5. A double-walled methanol high-pressure fuel pipe joint according to claim 4, characterized in that The other end of the male head sleeve (7) is provided with a third outer thread, the second fixed ring (12) is provided with a third inner thread matched with the third outer thread, and the second fixed ring (12) is threadedly connected with the male head sleeve (7).

6. A double-walled methanol high-pressure fuel pipe joint according to claim 4, characterized in that The male head sleeve (7) and the second limiting ring (18) are provided with a third sealing ring (15) therebetween.

7. A double-walled methanol high-pressure fuel pipe joint according to claim 1, characterized in that The male head sleeve (7) is provided with a sealing ring mounting groove, and the sealing ring mounting groove is mounted with a second sealing ring (5).

8. A double-walled methanol high-pressure fuel pipe joint according to claim 1, characterized in that The male head sleeve (7) is provided with a shoulder (16).

9. A double-walled methanol high-pressure fuel pipe joint according to claim 1, characterized in that The female head sleeve (6) is provided with an inner cavity, the butt joint part (8) is located in the inner cavity, and the periphery of the butt joint part (8) forms an annular gap (9), the first inner tube butt joint part (1) is provided with a first through hole (13), and the second inner tube butt joint part (11) is provided with a second through hole (14). The annular gap (9), the first through hole (13), the second through hole (14), the first empty space between the first outer tube (2) and the first inner tube (23), the second empty space between the second outer tube (10) and the second inner tube (24) are all communicated, and the first empty space, the first through hole (13), the annular gap (9), the second through hole (14) and the second empty space jointly constitute an inert gas channel.

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