Elbow with leak-proof structure

Abstract

The utility model relates to the technical field of pipe fittings, in particular to an elbow with a leakproof structure, which comprises an elbow body, an elbow sleeve is sleeved on the outer side of the elbow body, connecting rings are fixed at two ends of the elbow sleeve and the elbow body, a screw joint is integrally formed on one side of each connecting ring, a first sealing ring is embedded on the surface of each connecting ring, and a second sealing ring is embedded on the other side of each connecting ring. A second sealing ring is embedded in the end, away from the connecting ring, of the screw joint. The elbow has the beneficial effects that by adopting a multi-sealing structure and a double-layer elbow pipe design, the leakage probability of the elbow is obviously reduced, and the times of shutdown maintenance and elbow replacement caused by leakage are reduced, so that the maintenance cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of pipe fittings, specifically an elbow with a leak-proof structure. Background Technology

[0002] In industrial piping systems, elbows, as crucial components connecting pipelines and altering fluid flow direction, are widely used in various fields such as petroleum, chemical, natural gas, and water treatment. However, traditional elbows suffer from numerous design and usage problems that severely impact the safety and reliability of piping systems. For example: Susceptibility to impact damage: Traditional elbows are typically single-layered, making them vulnerable to damage from external impacts during installation, transportation, and use. Once cracks or holes appear in the elbow body, fluid leakage occurs, leading not only to resource waste but also potential safety accidents such as fires, explosions, or environmental pollution. Insufficient sealing performance: The connection between the elbow and the pipeline is a high-risk area for leaks. Traditional elbows typically use simple threaded or flanged connections at the joints, offering a limited sealing method that is ill-suited for complex working environments and high-pressure conditions. Over long-term use, factors such as vibration and temperature changes can cause the connection to loosen or the sealing material to age, leading to leaks. High maintenance costs: Traditional elbows lack effective leak-proof structures. Once a leak occurs, downtime for repairs or replacement of the elbow is required, which not only increases maintenance costs but also affects production efficiency. This is especially true in industries with high requirements for production continuity, such as chemical and pharmaceutical industries, where the losses from downtime for repairs are even greater.

[0003] While some leak-proof elbows exist on the market, they still have several shortcomings in design and performance: Limited leak-proof structure: Some leak-proof elbows only use a single sealing method at the connection, such as a rubber sealing ring. This method is difficult to guarantee a reliable seal under complex working conditions. Limited structural strength: Some leak-proof elbows, while incorporating leak-proof structures, neglect the reinforcement of the elbow's own structure, making it susceptible to damage under external forces and leading to leaks. Inconvenient installation: Some leak-proof elbows are overly complex in design, requiring specialized tools and technicians for installation. This not only increases installation costs but also prolongs installation time, impacting project progress. Utility Model Content

[0004] The purpose of this invention is to provide an elbow with a leak-proof structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an elbow with a leak-proof structure, comprising an elbow body, an elbow sleeve fitted on the outer side of the elbow body, connecting rings fixed at both ends of the elbow sleeve and the elbow body, a threaded joint integrally formed on one side of the connecting ring, a sealing ring I embedded on the surface of the connecting ring, and a sealing ring II embedded at the end of the threaded joint away from the connecting ring.

[0006] Preferably, both ends of the elbow body and the elbow sleeve are fitted with plug rings at the gap, and the plug rings are integrally formed on the other side of the connecting ring.

[0007] Preferably, the outer diameter of the connecting ring is equal to the outer diameter of the elbow sleeve, and the inner diameter of the connecting ring is equal to the inner diameter of the elbow body.

[0008] Preferably, the surface of the connecting ring is provided with an insert groove, which is an annular groove. After the sealing ring is fixed in the insert groove, the thickness of the sealing ring is greater than the depth of the insert groove.

[0009] Preferably, the outer ring surface of the screw connector is provided with an external thread, and the end of the screw connector away from the connecting ring is provided with an insert groove 2 on the outer ring surface. The insert groove 2 is an annular groove, and the sealing ring 2 is sleeved and fixed in the insert groove 2. The outer diameter of the sealing ring 2 is larger than the outer diameter of the screw connector.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] The elbow with a leak-proof structure proposed in this utility model has a plug ring inserted into the gap between the elbow body and the elbow sleeve at both ends. The plug ring is integrally formed on the other side of the connecting ring. The plug ring can prevent the end of the elbow sleeve from being deformed by pressure, further ensuring the structural stability of the elbow and ensuring that the elbow will not leak due to deformation during long-term use.

[0012] A sealing ring 1 is embedded on the surface of the connecting ring. When the conveying pipe is screwed onto the threaded joint, sealing ring 1 is squeezed between the connecting ring and the conveying pipe, providing a preliminary seal. Because the thickness of sealing ring 1 is greater than the depth of the embedding groove 1, it ensures a reliable sealing effect under various operating conditions. A sealing ring 2 is embedded at the end of the threaded joint away from the connecting ring. During the screwing process, sealing ring 2 is clamped between the threaded joint and the conveying pipe, forming a second line of defense for sealing. The outer diameter of sealing ring 2 is larger than the outer diameter of the threaded joint, further enhancing the sealing performance and effectively preventing fluid leakage from the connection point.

[0013] By adopting a multi-seal structure and a double-layer bend design, the elbow of this invention significantly reduces the probability of leakage, reduces the number of downtime maintenance and elbow replacements caused by leakage, thereby reducing maintenance costs and improving production efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a side view of the structure of this utility model;

[0016] Figure 3 for Figure 2 Sectional view of the structure at point AA;

[0017] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0018] Figure 5 This is a schematic diagram of the connection structure of the plug ring, connecting ring, and screw joint of this utility model.

[0019] In the diagram: 1. Elbow body; 2. Elbow sleeve; 3. Plug ring; 4. Connecting ring; 5. Threaded joint; 6. Insert groove one; 7. Sealing ring one; 8. Insert groove two; 9. Sealing ring two. Detailed Implementation

[0020] 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.

[0021] Please see Figures 1-5 This utility model provides a technical solution: an elbow with a leak-proof structure, including an elbow body 1, an elbow sleeve 2 sleeved on the outer side of the elbow body 1, a connecting ring 4 fixed at both ends of the elbow sleeve 2 and the elbow body 1, and a plug ring 3 inserted into the gap at both ends of the elbow body 1 and the elbow sleeve 2, the plug ring 3 being integrally formed on the other side of the connecting ring 4; the outer diameter of the connecting ring 4 is equal to the outer diameter of the elbow sleeve 2, and the inner diameter of the connecting ring 4 is equal to the inner diameter of the elbow body 1. The elbow sleeve 2 can be fitted onto the outside of the elbow body 1 because the elbow sleeve 2 is divided into three sections. The middle bending section of the elbow sleeve 2 is first fitted onto the middle of the elbow body 1. Then, the straight pipe sections at both ends of the elbow sleeve 2 are fitted onto the ends of the elbow body 1 respectively. Finally, the straight pipe sections of the elbow sleeve 2 are welded onto the middle bending section, thus forming a double-layer bend structure to prevent the elbow body 1 from being damaged by impact and causing leakage. After welding and fixing the connecting rings 4 to both ends of the elbow body 1 and the elbow sleeve 2, the elbow body 1 and the elbow sleeve 2 are connected and fixed. The plug ring 3 is inserted into the groove between the elbow body 1 and the elbow sleeve 2 to prevent the end of the elbow sleeve 2 from being deformed by pressure.

[0022] One side of the connecting ring 4 is integrally formed with a threaded connector 5. A sealing ring 7 is embedded in the surface of the connecting ring 4. An insert groove 6 is formed on the surface of the connecting ring 4. The insert groove 6 is an annular groove. After the sealing ring 7 is fixed in the insert groove 6, the thickness of the sealing ring 7 is greater than the depth of the insert groove 6. A second sealing ring 9 is embedded in the end of the threaded connector 5 away from the connecting ring 4. The outer ring surface of the threaded connector 5 has external threads. An insert groove 8 is formed on the outer ring surface of the end of the threaded connector 5 away from the connecting ring 4. The insert groove 8 is an annular groove. The second sealing ring 9 is fitted and fixed in the insert groove 8. The outer diameter of the second sealing ring 9 is greater than the outer diameter of the threaded connector 5. After the conveying pipe is screwed onto the threaded connector 5, the sealing ring 7 is squeezed between the connecting ring 4 and the conveying pipe to achieve a sealing effect, and the second sealing ring 9 is clamped between the threaded connector 5 and the conveying pipe to achieve a sealing effect, thereby avoiding leakage problems caused by the installation of a bend in the pipe with two conveying pipes.

[0023] The following are the instructions for using elbows with leak-proof structures:

[0024] I. Preparations before installation: Carefully check whether the elbow body 1, elbow sleeve 2, plug ring 3, connecting ring 4, screw joint 5, sealing ring 1 7, sealing ring 2 9 and other components are complete, damaged or missing, and ensure that each component can be put into normal use.

[0025] II. Assembly of Elbow Sleeve and Elbow Body: Since the elbow sleeve 2 is divided into three sections, first, fit the middle bending section of the elbow sleeve 2 onto the middle of the elbow body 1, ensuring a good fit between the middle bending section and the middle of the elbow body 1. Next, fit the straight pipe sections at both ends of the elbow sleeve 2 onto both ends of the elbow body 1, ensuring accurate alignment between the straight pipe sections and both ends of the elbow body 1. Weld the straight pipe sections of the elbow sleeve 2 onto the middle bending section, thus forming a double-layer elbow structure. This structure effectively prevents leakage caused by damage to the elbow body 1 during use.

[0026] 3. Fixing the connecting ring to the elbow body and elbow sleeve: Connecting rings 4 are welded to both ends of the elbow body 1 and elbow sleeve 2. During welding, ensure welding quality to guarantee a secure connection between the connecting rings 4 and the elbow body 1 and elbow sleeve 2. After welding, the plug ring 3 (integratedly formed on the other side of the connecting ring 4) will automatically insert into the groove between the elbow body 1 and elbow sleeve 2. The plug ring 3 prevents the end of the elbow sleeve 2 from deforming under pressure, further ensuring the stability of the elbow.

[0027] IV. Connection and Sealing with the Conveying Pipeline: Place the conveying pipeline to be connected onto the threaded connector 5, ensuring accurate alignment between the pipeline and connector 5 to prepare for subsequent threading. Utilize the external thread on the outer ring of connector 5 to thread the conveying pipeline to connector 5, ensuring a tight connection between the pipeline and the elbow. During the threading process, the sealing ring 7, embedded in the annular groove 6 on the surface of the connecting ring 4, is compressed between the connecting ring 4 and the conveying pipeline. Since the thickness of sealing ring 7 is greater than the depth of the groove 6, it effectively seals, preventing liquid or gas leakage from the gap between the connecting ring 4 and the conveying pipeline. Simultaneously, the sealing ring 9, embedded in the annular groove 8 on the outer ring of connector 5 at the end furthest from the connecting ring 4, is clamped between connector 5 and the conveying pipeline. Because the outer diameter of sealing ring 9 is larger than the outer diameter of connector 5, it further enhances the sealing effect, preventing leakage problems when the elbow is installed between two conveying pipelines.

[0028] V. Post-Installation Inspection: After installation, carefully inspect the appearance of the connection between the elbow and the conveying pipeline, checking for any obvious gaps, looseness, or damage. Sealing Test: Appropriate methods (such as pressure testing, airtightness testing, etc.) can be used to test the sealing performance of the elbow to ensure that no leakage occurs during actual use, guaranteeing the normal operation of the system.

[0029] 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 bend with a leak-proof structure, comprising a bend body (1), characterized in that: The outer side of the elbow body (1) is sleeved with an elbow sleeve (2), the two ends of the elbow sleeve (2) and the elbow body (1) are fixedly provided with connecting rings (4), one side of the connecting ring (4) is integrally formed with a threaded joint (5), the surface of the connecting ring (4) is embedded with a sealing ring one (7), and the end of the threaded joint (5) away from the connecting ring (4) is embedded with a sealing ring two (9).

2. The leak-proof elbow according to claim 1, wherein: The two ends of the elbow body (1) and the elbow sleeve (2) are inserted with plug rings (3) at gaps, and the plug ring (3) is integrally formed on the other side of the connecting ring (4).

3. The leak-proof elbow according to claim 1, wherein: The outer diameter of the connecting ring (4) is equal to the outer diameter of the elbow sleeve (2), and the inner diameter of the connecting ring (4) is equal to the inner diameter of the elbow body (1).

4. The leak-proof elbow according to claim 1, wherein: The surface of the connecting ring (4) is provided with an embedded groove one (6), the embedded groove one (6) is an annular groove, the sealing ring one (7) is fixed behind the embedded groove one (6), and the thickness of the sealing ring one (7) is greater than the depth of the embedded groove one (6).

5. The leak-proof elbow according to claim 1, wherein: The outer surface of the threaded joint (5) is provided with external threads, the end of the threaded joint (5) away from the connecting ring (4) is provided with an embedded groove two (8) on the outer surface, the embedded groove two (8) is an annular groove, the sealing ring two (9) is sleeved and fixed in the embedded groove two (8), and the outer diameter of the sealing ring two (9) is greater than the outer diameter of the threaded joint (5).

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