Pipe fitting with multiple seals for marine vessels

Abstract

The utility model relates to a pipe fitting with multiple seals for ship, including first pipe body and second pipe body. The both sides of first sealing washer are equipped with first slot respectively, and the end part of two pipe bodies is inserted to realize positioning and sealing, sealing washer forms the outer ring and inner ring through the slot, the outer wall of the opposite end of two pipe bodies is fixed with extension ring all, and the second slot is set up on the extension ring and is inserted with the outer ring of sealing washer, a series of connecting holes are also set up on the ring, and bolt and nut that can form the thread cooperation with bolt are also equipped, the bolt can pass through the connecting hole of two extension rings simultaneously, and is locked through the nut, thereby the two pipe bodies are detachably fixed and connected, the combination of the structure through the insertion cooperation and bolt connection realizes the multiple reliable seals of static and dynamic combination.

Description

Technical Field

[0001] This utility model relates to pipe fittings with multiple seals for use in ships. Background Technology

[0002] Ship piping systems are the "blood vessels" of a vessel, responsible for transporting various media such as fuel oil, lubricating oil, seawater, and fresh water. Because ships operate in harsh marine environments characterized by high humidity, high salt spray, and strong vibrations, the reliability of the seals at pipe connections directly impacts the ship's operational safety and maintenance costs.

[0003] Simple socket joints have poor sealing performance and usually rely on a single sealing ring. When the medium pressure fluctuates or the pipe is deformed by external forces, leakage paths are easily generated. Some multi-layer sealing structures in the existing technology are often complex in design, and there is a lack of synergy between the sealing layers. It is difficult to ensure that all sealing surfaces are under pressure at the same time during installation. Once a sealing interface fails, the medium will rush out directly, and it is impossible to achieve step-by-step blocking and sealing compensation.

[0004] Therefore, there is an urgent need for a more reliable sealing structure for marine pipe fittings. Summary of the Invention

[0005] The purpose of this invention is to provide a pipe fitting for ships with multiple seals, which can achieve multiple reliable seals combining static and dynamic properties.

[0006] The technical solution to achieve the purpose of this utility model is as follows: This utility model has a first tube body and a second tube body; it also has a first sealing ring, with two sides of the first sealing ring corresponding to the first tube body and the second tube body respectively. Each side of the first sealing ring has a first slot that can be inserted into the first tube body and the second tube body. The opposite ends of the first tube body and the second tube body are connected and positioned by inserting into the first slots. The first sealing ring forms an outer ring and an inner ring through the first slots. Coaxially arranged extension rings are fixed on the outer walls of the opposite ends of the first tube body and the second tube body. The extension rings are provided with... There is a second slot that can be inserted into the outer ring. The extension ring is also provided with multiple connecting holes that extend along the contour direction of the continuation ring. The connecting holes of the extension ring on the first tube and the second tube are connected. There is also a bolt that can pass through the connecting holes of the extension ring on the first tube and the second tube, and a nut that can be threaded into the bolt. The opposite ends of the first tube and the second tube are detachably fixedly connected by their respective insertion into the first slot, the insertion into the second slot on the extension ring of the outer ring of the first sealing ring, and the threaded engagement between the bolt and the nut after passing through the extension ring.

[0007] Furthermore, a second sealing ring is fixedly mounted coaxially on the inner wall of the first sealing ring. Multiple entry holes centered on the axis of the second sealing ring are provided through the side wall of the second sealing ring. The interior of the second sealing ring has multiple first, second, and third connecting grooves, each corresponding to one of the entry holes and connected at one end to the entry hole. These grooves are evenly arranged from one side of the second sealing ring to the other. The other ends of the first and third connecting grooves are connected to a first extrusion groove located within the inner ring. The first extrusion groove on the first connecting groove extends towards a first slot on one side of the first sealing ring, and the first extrusion groove on the third connecting groove extends towards a first slot on the other side of the first sealing ring. The other end of the second connecting groove extends into the outer ring, and the end of the second connecting groove extending into the outer ring is connected to the second and third extrusion grooves. The second extrusion groove extends towards a first slot on one side of the first sealing ring, and the third extrusion groove extends towards a first slot on the other side of the first sealing ring.

[0008] Furthermore, both the first and third connecting grooves are provided with a plurality of anti-reverse arc-shaped strips that are evenly arranged along the extension direction of their respective connecting grooves. One end of the anti-reverse arc-shaped strip in the first connecting groove is fixedly set on the groove wall of the first connecting groove, and the other end of the anti-reverse arc-shaped strip in the first connecting groove extends toward the first extrusion groove connected to the first connecting groove; one end of the anti-reverse arc-shaped strip in the third connecting groove is fixedly set on the groove wall of the third connecting groove, and the other end of the anti-reverse arc-shaped strip in the third connecting groove extends toward the first extrusion groove connected to the third connecting groove.

[0009] Furthermore, a third sealing ring is fixedly provided in the second slot, extending along the extension direction of the slot wall of the second slot. The outer side of the third sealing ring is fixedly provided on the slot wall of the second slot, and the inner side of the third sealing ring acts on the outer ring of the first sealing ring.

[0010] Furthermore, the inner side of the third sealing ring is fixedly provided with multiple protruding rings concentrically arranged with the axis of the first sealing ring as the center. One side of the protruding ring is fixedly set on the third sealing ring, and the other side of the protruding ring acts on the outer side of the first sealing ring. The protruding ring forms a compression contact with the outer ring of the first sealing ring through the contact between the inner side of the third sealing ring and the outer ring of the first sealing ring, and through the threaded engagement of the bolt with the nut after passing through the extension ring.

[0011] Furthermore, the outer walls of the first and second pipes are covered with a rubber layer to prevent the intrusion of external seawater, salt spray and impurities.

[0012] The present invention has the following positive effects: (1) The present invention forms a first seal by the first sealing ring and the slots of the first and second pipe bodies, and forms a double mechanical seal interface by the extension ring and the second slot of the outer ring of the sealing ring, which effectively prevents the leakage of the medium.

[0013] (2) The second sealing ring and the first connecting groove, second connecting groove, third connecting groove and first extrusion groove, second extrusion groove and third extrusion groove inside the first sealing ring in this utility model can guide the pressure to act evenly on different areas of the sealing ring when the internal medium pressure changes, realize pressure adaptive compensation, and further improve the tightness and stability of the seal.

[0014] (3) The anti-reverse arc strip in the second sealing groove of this utility model can guide the medium flow in one direction, prevent the medium from flowing back and impacting the sealing interface when the ship shakes or the pressure fluctuates, and enhance the impact resistance and durability of the sealing system.

[0015] (4) The first sealing ring of this utility model simultaneously undertakes the functions of sealing and connection positioning. It is inserted into the tube body through the slots on both sides to achieve rapid initial positioning and simplify the assembly process.

[0016] (5) The connecting hole on the extension ring of this utility model is matched with bolts and nuts to provide a detachable rigid connection, ensuring that the two pipes remain firmly connected under harsh working conditions such as vibration and impact, avoiding loosening and leakage. The overall structure is modularly designed, which facilitates disassembly, maintenance or replacement of sealing components, reducing maintenance costs and time.

[0017] (6) The third sealing ring and the concentric protruding ring on its inner side provided in the second slot of this utility model can generate uniform radial compression when the bolt is tightened, thereby enhancing the static sealing effect between the outer ring of the first sealing ring and the extension ring.

[0018] (7) The rubber layer covering the outer wall of the first and second pipes of this utility model can effectively isolate seawater, salt spray and impurities, prevent corrosion of the pipe body and external erosion of the sealing structure, and extend the overall service life. Attached Figure Description

[0019] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein... Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a side sectional view of the present invention; Figure 3 for Figure 2 A magnified view of part A in the middle.

[0020] In the diagram, the components are: 1 (first tube body), 2 (second tube body), 3 (first sealing ring), 31 (outer ring), 32 (inner ring), 4 (first slot), 5 (extension ring), 51 (second slot), 511 (third sealing ring), 5111 (protruding ring), 6 (bolt), 7 (nut), 8 (second sealing ring), 81 (entry hole), 82 (first connecting groove), 83 (second connecting groove), 831 (second extrusion groove), 832 (third extrusion groove), 84 (third connecting groove), 9 (first extrusion groove), 10 (anti-reverse arc strip), and 11 (rubber layer). Detailed Implementation

[0021] See Figures 1 to 3 This utility model comprises a first tube body 1 and a second tube body 2; it also includes a first sealing ring 3, with two sides of the first sealing ring 3 corresponding to the first tube body 1 and the second tube body 2 respectively. Each side of the first sealing ring 3 has a first slot 4 that can be inserted into the first tube body 1 and the second tube body 2. The opposite ends of the first tube body 1 and the second tube body 2 are connected and positioned by inserting into the first slot 4. The first sealing ring 3 forms an outer ring 31 and an inner ring 32 through the first slot 4. Coaxially arranged extension rings 5 ​​are fixed on the outer walls of the opposite ends of the first tube body 1 and the second tube body 2. The extension rings 5 ​​have extension rings that can be inserted into the outer ring 31. The second slot 51 is for insertion and engagement. The extension ring 5 is also provided with a plurality of connecting holes extending along the contour direction of the continuation ring. The connecting holes of the extension ring 5 on the first tube 1 and the second tube 2 are connected. There is also a bolt 6 that can pass through the connecting holes of the extension ring 5 on the first tube 1 and the second tube 2, and a nut 7 that can form a threaded engagement with the bolt 6. The opposite ends of the first tube 1 and the second tube 2 are connected in a detachable fixed connection through their respective insertion and engagement with the first slot 4, the insertion and engagement of the outer ring 31 of the first sealing ring 3 with the second slot 51 on the extension ring 5, and the threaded engagement of the bolt 6 with the nut 7 after passing through the extension ring 5.

[0022] A second sealing ring 8 is fixedly mounted coaxially on the inner wall of the first sealing ring 3. Multiple entry holes 81, centered on the axis of the second sealing ring 8, are provided through the side wall of the second sealing ring 8. The interior of the second sealing ring 8 has multiple first connecting grooves 82, second connecting grooves 83, and third connecting grooves 84, each corresponding to one of the entry holes 81 and connected at one end to one of the entry holes 81. The first connecting grooves 82, second connecting grooves 83, and third connecting grooves 84 are evenly arranged from one side of the second sealing ring 8 to the other. The other ends of the first connecting grooves 82 and third connecting grooves 84 are connected to a connection located within the inner ring 32. The first extrusion groove 9 on the first connecting groove 82 extends toward the first slot 4 on one side of the first sealing ring 3, and the first extrusion groove 9 on the third connecting groove 84 extends toward the first slot 4 on the other side of the first sealing ring 3; the other end of the second connecting groove 83 extends into the outer ring 31, and one end of the second connecting groove 83 extending into the outer ring 31 is connected to the second extrusion groove 831 and the third extrusion groove 832. The second extrusion groove 831 extends toward the first slot 4 on one side of the first sealing ring 3, and the third extrusion groove 832 extends toward the first slot 4 on the other side of the first sealing ring 3.

[0023] Both the first connecting groove 82 and the third connecting groove 84 are provided with a plurality of anti-reverse arc-shaped strips 10 that extend evenly along the extension direction of the connecting groove. One end of the anti-reverse arc-shaped strip 10 in the first connecting groove 82 is fixedly set on the groove wall of the first connecting groove 82, and the other end of the anti-reverse arc-shaped strip 10 in the first connecting groove 82 extends toward the first extrusion groove 9 connected to the first connecting groove 82. One end of the anti-reverse arc-shaped strip 10 in the third connecting groove 84 is fixedly set on the groove wall of the third connecting groove 84, and the other end of the anti-reverse arc-shaped strip 10 in the third connecting groove 84 extends toward the first extrusion groove 9 connected to the third connecting groove 84.

[0024] A third sealing ring 511 is fixedly provided in the second slot 51, extending along the extension direction of the groove wall of the second slot 51. The outer side of the third sealing ring 511 is fixedly provided on the groove wall of the second slot 51, and the inner side of the third sealing ring 511 acts on the outer ring 31 of the first sealing ring 3.

[0025] Multiple protruding rings 5111 are fixedly provided on the inner side of the third sealing ring 511, which are concentrically arranged with the axis of the first sealing ring 3 as the center. One side of the protruding ring 5111 is fixedly provided on the third sealing ring 511, and the other side of the protruding ring 5111 acts on the outer side of the first sealing ring 3. The protruding ring 5111 forms a compression contact with the outer ring 31 of the first sealing ring 3 through the contact between the inner side of the third sealing ring 511 and the outer side of the first sealing ring 3 through the threaded engagement of the bolt 6 with the nut 7 after passing through the extension ring 5.

[0026] The outer walls of the first tube 1 and the second tube 2 are covered with a rubber layer 11 to prevent the intrusion of external seawater, salt spray and impurities.

[0027] This invention features multiple active collaborative sealing mechanisms, resulting in a revolutionary improvement in reliability, as detailed below: First-stage insertion positioning seal: The end of the tube body mates with the first slot 4 of the first sealing ring 3 to form an initial axial seal and precise alignment.

[0028] Secondary annular clamping seal: Multiple bolts 6 are distributed around the two sides to tighten the extended rings 5, generating a 360° uniform radial clamping force on the outer ring 31 of the first sealing ring 3, which complements the primary seal mechanically, making the basic seal extremely reliable.

[0029] The three-stage pressure adaptive enhanced seal: The integrated second sealing ring 8 forms an intelligent pressure feedback system. When the pressure of the medium inside the pipe increases, the medium enters the network of connecting grooves through the inlet hole 81 and is injected into the various extrusion grooves at the root of the first slot 4 and the contact area of ​​the outer ring 31. This pressure forces the elastic material of the first sealing ring 3 to fit more tightly against the pipe wall and the extension ring 5 from the inside, achieving an adaptive enhancement effect of "the higher the medium pressure, the greater the sealing specific pressure," fundamentally solving the problem of traditional static seals easily failing under pressure fluctuations.

[0030] Level 4 radial labyrinth seal: The third sealing ring 511 and its protruding ring 5111 in the second slot 51 of the extension ring 5 form multiple tight circumferential line contacts with the outer ring 31 of the first sealing ring 3 after tightening, thus forming an effective radial labyrinth seal and greatly extending the potential leakage path.

[0031] Level 5 external environmental protection: The rubber layer 11 on the outer wall of the pipe isolates it from salt spray and seawater, protects the metal connection structure, and improves the overall corrosion resistance and service life.

[0032] The working principle of this utility model is as follows: The first sealing ring 3, which has integrated the second sealing ring 8, is placed between the end faces of the two tubes. The first tube 1 and the second tube 2 are pushed into the bottom of the first slots 4 on both sides of the second sealing ring 8 to align the first tube 1 and the second tube 2. The outer ring 31 of the first sealing ring 3 slides into the second slots 51 of the extension rings 5 ​​on both sides. At this time, all connecting holes should be aligned. The bolts 6 are passed through all the aligned connecting holes in sequence, and the nuts 7 are screwed on with a torque wrench. All nuts 7 are tightened gradually in a symmetrical order until the specified torque is reached. At this time, the extension rings 5 ​​on the first tube 1 and the second tube 2 are pressed together. At this time, the extension rings 5 ​​are pressed, and the protruding rings 5111 of the third sealing ring 511 are pressed into the surface of the outer ring 31 of the first sealing ring 3, forming multiple sealing lines.

[0033] When the pipeline transports media such as fuel or lubricating oil, the system pressure is transmitted to each compression groove through the internal channel network of the second sealing ring 8, dynamically increasing the sealing pressure in the corresponding area and creating a tightening effect with increasing pressure. The outer rubber layer 11 provides long-term corrosion protection.

[0034] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pipe fitting for ships with multiple seals, comprising a first pipe body (1) and a second pipe body (2); characterized in that: A first sealing ring (3) is also provided. The two sides of the first sealing ring (3) are respectively provided corresponding to the first tube body (1) and the second tube body (2). The two sides of the first sealing ring (3) are respectively provided with first slots (4) that can be inserted into the first tube body (1) and the second tube body (2). The opposite ends of the first tube body (1) and the second tube body (2) are connected and positioned by inserting into the first slots (4). The first sealing ring (3) forms an outer ring (31) and an inner ring (32) through the first slots (4). The outer walls of the opposite ends of the first tube body (1) and the second tube body (2) are respectively provided with coaxially arranged extension rings (5). The extension rings (5) are provided with second slots (5) that can be inserted into the outer rings (31). 1) The extension ring (5) is also provided with multiple connecting holes extending along the contour direction of the continuation ring. The connecting holes of the extension ring (5) on the first tube (1) and the second tube (2) are connected. There are also bolts (6) that can pass through the connecting holes of the extension ring (5) on the first tube (1) and the second tube (2) and nuts (7) that can form a threaded engagement with the bolts (6). The opposite ends of the first tube (1) and the second tube (2) form a detachable fixed connection through their respective insertion engagement with the first slot (4), the insertion engagement of the outer ring (31) of the first sealing ring (3) with the second slot (51) on the extension ring (5), and the threaded engagement of the bolt (6) with the nut (7) after passing through the extension ring (5).

2. The multi-seal pipe fitting for ships according to claim 1, characterized in that: The inner wall of the first sealing ring (3) is fixedly provided with a second sealing ring (8) coaxially arranged. The side wall of the second sealing ring (8) is provided with a plurality of entry holes (81) centered on the axis of the second sealing ring (8). The interior of the second sealing ring (8) is provided with a plurality of first connecting grooves (82), second connecting grooves (83) and third connecting grooves (84) corresponding to each entry hole (81) and connected to the entry hole (81) at one end. The first connecting grooves (82), second connecting grooves (83) and third connecting grooves (84) are evenly arranged from one side of the second sealing ring (8) to the other side. The other end of the first connecting grooves (82) and third connecting grooves (84) are connected to a first connecting groove located in the inner ring (32). The extrusion groove (9) on the first connecting groove (82) extends toward the first slot (4) on one side of the first sealing ring (3), and the extrusion groove (9) on the third connecting groove (84) extends toward the first slot (4) on the other side of the first sealing ring (3); the other end of the second connecting groove (83) extends into the outer ring (31), and one end of the second connecting groove (83) extending into the outer ring (31) is connected to the second extrusion groove (831) and the third extrusion groove (832). The second extrusion groove (831) extends toward the first slot (4) on one side of the first sealing ring (3), and the third extrusion groove (832) extends toward the first slot (4) on the other side of the first sealing ring (3).

3. The multi-seal pipe fitting for ships according to claim 2, characterized in that: Both the first connecting groove (82) and the third connecting groove (84) are provided with a plurality of anti-reverse arc strips (10) that extend evenly along the extension direction of the connecting groove. One end of the anti-reverse arc strip (10) in the first connecting groove (82) is fixedly set on the groove wall of the first connecting groove (82), and the other end of the anti-reverse arc strip (10) in the first connecting groove (82) extends toward the first extrusion groove (9) connected to the first connecting groove (82). One end of the anti-reverse arc strip (10) in the third connecting groove (84) is fixedly set on the groove wall of the third connecting groove (84), and the other end of the anti-reverse arc strip (10) in the third connecting groove (84) extends toward the first extrusion groove (9) connected to the third connecting groove (84).

4. The multi-seal pipe fitting for ships according to claim 1, characterized in that: The second slot (51) is fixedly provided with a third sealing ring (511) extending along the extension direction of the groove wall of the second slot (51). The outer side of the third sealing ring (511) is fixedly provided on the groove wall of the second slot (51), and the inner side of the third sealing ring (511) acts on the outer ring (31) of the first sealing ring (3).

5. The multi-seal pipe fitting for ships according to claim 4, characterized in that: The inner side of the third sealing ring (511) is fixed with multiple protruding rings (5111) arranged concentrically with the axis of the first sealing ring (3). One side of the protruding ring (5111) is fixed on the third sealing ring (511), and the other side of the protruding ring (5111) acts on the outer side of the first sealing ring (3). The protruding ring (5111) forms a compression contact with the outer ring (31) of the first sealing ring (3) through the contact between the inner side of the third sealing ring (511) and the outer ring (31) of the first sealing ring (3), and the bolt (6) forms a compression contact with the outer side of the first sealing ring (3) after passing through the extension ring (5) and the threaded engagement of the nut (7) with the nut (7) after passing through the extension ring (5).

6. The multi-seal pipe fitting for ships according to claim 1, characterized in that: The outer walls of the first tube (1) and the second tube (2) are covered with a rubber layer (11) to prevent the intrusion of external seawater, salt spray and impurities.

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