CN223768417U - An elbow with a leak-proof structure - Google Patents

Abstract

The utility model relates to the technical field of pipe fittings, in particular to an elbow with a leakage-proof structure, which comprises an elbow body, wherein an elbow sleeve is sleeved on the outer side of the elbow body, connecting rings are fixed at the two ends of the elbow sleeve and the elbow body, a screw joint is integrally formed at 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 at one end of each screw joint, which is far away from each connecting ring.

Description

Elbow with leak-proof structure

Technical Field

The utility model relates to the field of pipe fittings, in particular to an elbow with a leakage-proof structure.

Background

In industrial pipeline systems, elbows are widely used as important components for connecting pipelines and changing fluid flow directions in a plurality of fields such as petroleum, chemical industry, natural gas, water treatment and the like. However, the conventional elbow has a plurality of problems in the design and use process, which seriously affect the safety and reliability of the pipeline system, for example, the conventional elbow is easy to collide and damage, for example, the conventional elbow is usually of a single-layer structure, and is easy to collide and damage due to external force in the installation, transportation and use processes. Once the elbow body is cracked or perforated, fluid can leak, which not only causes resource waste, but also can cause safety accidents such as fire, explosion or environmental pollution. The sealing performance is insufficient, namely the joint of the elbow and the conveying pipeline is a leakage high-incidence area. The traditional elbow adopts simple threaded connection or flange connection at the junction generally, and sealing mode is single, is difficult to deal with complicated operational environment and high pressure condition. In the long-term use process, due to the influence of factors such as vibration, temperature change and the like, the joint is easy to loose or the sealing material is easy to age, so that the leakage problem is caused. The maintenance cost is high, and the traditional elbow is lack of an effective leakage-proof structure, so that once leakage occurs, the elbow needs to be shut down for maintenance or replacement, thereby not only increasing the maintenance cost, but also affecting the production efficiency. Especially in some industries with high requirements on production continuity, such as chemical industry, pharmacy and the like, the loss caused by shutdown maintenance is huge.

Although some elbow products with the anti-leakage function exist in the market, the design and the performance of the products still have the defects that the anti-leakage structure is single, and part of the anti-leakage elbow is sealed only at the joint by adopting a single sealing mode, such as a rubber sealing ring, and the sealing effect of the sealing mode is difficult to ensure when facing complex working conditions. The structure strength is limited, and although some anti-leakage elbows are additionally provided with anti-leakage structures, the strengthening of the body structure of the elbow is neglected, so that the elbow is still easy to damage under the action of external force, and leakage is further caused. The installation is inconvenient, the design of part of the anti-leakage elbow is too complex, the installation process is complicated, and professional tools and technicians are needed, so that the installation cost is increased, the installation time is prolonged, and the engineering progress is influenced.

Disclosure of utility model

The present utility model is directed to an elbow with a leakage preventing structure, so as to solve the problems set forth in the background art.

In order to achieve the purpose, the elbow with the anti-leakage structure comprises an elbow body, wherein an elbow sleeve is sleeved on the outer side of the elbow body, connecting rings are fixed at the 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 one end, far away from each connecting ring, of each screw joint.

Preferably, both ends of the elbow body and the elbow sleeve are inserted with plug rings at the gaps, and the plug rings are integrally formed at the other side of the connecting ring.

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.

Preferably, the surface of the connecting ring is provided with an embedded groove I, the embedded groove I is an annular groove, and the thickness of the sealing ring I is larger than the depth of the embedded groove I after the sealing ring I is fixed in the embedded groove I.

Preferably, the outer ring surface of the screw joint is provided with external threads, one end of the screw joint, which is far away from the connecting ring, is provided with a second embedded groove which is an annular groove, the second sealing ring is sleeved and fixed in the second embedded groove, and the outer diameter of the second sealing ring is larger than that of the screw joint.

Compared with the prior art, the utility model has the beneficial effects that:

The elbow with the anti-leakage structure is characterized in that a plug ring is inserted at the two ends of the elbow body and the elbow sleeve, and the plug ring is integrally formed at the other side of the connecting ring. The arrangement of the plug ring can avoid the end part of the elbow sleeve from being deformed by compression, further ensure the structural stability of the elbow and ensure that the elbow cannot leak due to deformation in the long-term use process.

The first sealing ring is embedded on the surface of the connecting ring, and when the conveying pipeline is sleeved with the screw joint on the screw joint, the first sealing ring is extruded between the connecting ring and the conveying pipeline for a while to play a role in primary sealing. The thickness of the first sealing ring is larger than the depth of the first embedded groove, so that reliable sealing effect can be ensured under various working conditions. And a second sealing ring is embedded at one end of the screw joint, which is far away from the connecting ring, and the second sealing ring is clamped between the screw joint and the conveying pipeline in the screw joint process to form a second sealing line. The outer diameter of the second sealing ring is larger than that of the screw joint, so that the sealing performance is further enhanced, and the leakage of fluid from the joint is effectively prevented.

By adopting a multiple sealing structure and a double-layer bent pipe design, the elbow provided by the utility model obviously reduces the leakage probability, and reduces the times of shutdown maintenance and elbow replacement caused by leakage, thereby reducing the maintenance cost and improving the production efficiency.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a side view of the structure of the present utility model;

FIG. 3 is a cross-sectional view of the structure at A-A in FIG. 2;

FIG. 4 is an enlarged schematic view of the structure shown in FIG. 3A;

FIG. 5 is a schematic view of the plug ring, connecting ring and screw joint connection structure of the present utility model.

In the figure, an elbow body 1, an elbow sleeve 2, a plug ring 3, a connecting ring 4, a screw joint 5, a first embedded groove 6, a first sealing ring 7, a second embedded groove 8 and a second sealing ring 9 are arranged.

Detailed Description

In order to make the objects, technical solutions, and advantages of the present utility model more apparent, the embodiments of the present utility model will be further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are some, but not all, embodiments of the present utility model, are intended to be illustrative only and not limiting of the embodiments of the present utility model, and that all other embodiments obtained by persons of ordinary skill in the art without making any inventive effort are within the scope of the present utility model.

Referring to fig. 1-5, the utility model provides a technical scheme that an elbow with a leakage-proof structure comprises an elbow body 1, wherein an elbow sleeve 2 is sleeved on the outer side of the elbow body 1, connecting rings 4 are fixed at both ends of the elbow sleeve 2 and the elbow body 1, plug rings 3 are inserted into both ends of the elbow body 1 and the elbow sleeve 2 at gaps, the plug rings 3 are integrally formed on the other side of the connecting rings 4, the outer diameter of the connecting rings 4 is equal to the outer diameter of the elbow sleeve 2, and the inner diameter of the connecting rings 4 is equal to the inner diameter of the elbow body 1. The elbow sleeve 2 can be sleeved on the outer side of the elbow body 1 because the elbow sleeve 2 is divided into three sections, after the middle bending section of the elbow sleeve 2 is sleeved on the middle of the elbow body 1, the straight pipe sections at the two ends of the elbow sleeve 2 are sleeved on the two ends of the elbow body 1 respectively, then the straight pipe sections of the elbow sleeve 2 are welded on the middle bending section, a double-layer elbow structure is formed, the elbow body 1 is prevented from being knocked and damaged to generate leakage, after the connecting rings 4 are welded and fixed at the two ends of the elbow body 1 and the elbow sleeve 2, the elbow body 1 and the elbow sleeve 2 are connected and fixed, and the plug ring 3 is inserted into a groove body between the elbow body 1 and the elbow sleeve 2, so that the end part of the elbow sleeve 2 is prevented from being pressed and deformed.

The connecting ring 4 is integrally formed with a screw joint 5 on one side, a first sealing ring 7 is embedded on the surface of the connecting ring 4, an embedded groove 6 is formed on the surface of the connecting ring 4, the embedded groove 6 is an annular groove, the thickness of the first sealing ring 7 is larger than the depth of the embedded groove 6 after the first sealing ring 7 is fixed in the embedded groove 6, a second sealing ring 9 is embedded at one end, far away from the connecting ring 4, of the screw joint 5, an external thread is arranged on the outer ring surface of the screw joint 5, an embedded groove 8 is formed on the outer ring surface at one end, far away from the connecting ring 4, of the screw joint 5, the embedded groove 8 is an annular groove, the second sealing ring 9 is sleeved and fixed in the embedded groove 8, and the outer diameter of the second sealing ring 9 is larger than the outer diameter of the screw joint 5. After the screw joint 5 is sleeved on the conveying pipeline, the first sealing ring 7 is extruded between the connecting ring 4 and the conveying pipeline to play a sealing role, and the second sealing ring 9 is clamped between the screw joint 5 and the conveying pipeline to play a sealing role, so that the problem of leakage caused by the fact that the bent pipe is installed on the two conveying pipelines is avoided.

The elbow with the anti-leakage structure is used as follows:

1. Before installation, the elbow body 1, the elbow sleeve 2, the plug ring 3, the connecting ring 4, the screw joint 5, the first sealing ring 7, the second sealing ring 9 and other parts are carefully checked to see whether damage or missing exists or not, so that the normal use of the parts is ensured.

2. The elbow sleeve is assembled with the elbow body, namely, the elbow sleeve 2 is divided into three sections, and the middle bending section of the elbow sleeve 2 is sleeved at the middle position of the elbow body 1, so that the middle bending section is well attached to the middle of the elbow body 1. Then, the straight pipe sections at the two ends of the elbow sleeve 2 are respectively sleeved at the two ends of the elbow body 1, so that the straight pipe sections are accurately butted with the two ends of the elbow body 1. The straight pipe section of the elbow sleeve 2 is welded on the middle bending section, so that a double-layer elbow structure is formed. The structure can effectively avoid the leakage phenomenon of the elbow body 1 caused by being knocked and damaged in the using process.

3. The connecting ring is fixed with the elbow body and the elbow sleeve, namely, the connecting ring 4 is welded and fixed at the two ends of the elbow body 1 and the elbow sleeve 2, the welding quality is ensured in the welding process, and the connecting ring 4 is firmly connected with the elbow body 1 and the elbow sleeve 2. After the welding is finished, the plug ring 3 (integrally formed on the other side of the connecting ring 4) can be automatically inserted into the groove body between the elbow body 1 and the elbow sleeve 2, and the arrangement of the plug ring 3 can prevent the end part of the elbow sleeve 2 from being deformed under pressure, so that the stability of the elbow is further ensured.

4. Connecting and sealing the conveying pipeline, namely sleeving the conveying pipeline to be connected on the screw joint 5, ensuring that the conveying pipeline is accurately butted with the screw joint 5, and preparing for subsequent screw joint operation. The conveying pipeline is screwed with the screw joint 5 by using the external threads of the outer ring surface of the screw joint 5, so that the conveying pipeline is tightly connected with the elbow. In the screwing process, the first sealing ring 7 embedded in the first embedded groove 6 (in the shape of an annular groove) on the surface of the connecting ring 4 is extruded between the connecting ring 4 and the conveying pipeline. The thickness of the first sealing ring 7 is larger than the depth of the first embedded groove 6, so that the sealing effect can be effectively achieved, and liquid or gas is prevented from leaking from a gap between the connecting ring 4 and the conveying pipeline. Meanwhile, a second sealing ring 9 embedded in a second annular surface embedded groove 8 (in an annular groove) at the end, far away from the connecting ring 4, of the screw joint 5 can be clamped between the screw joint 5 and the conveying pipeline. Because the external diameter of the second sealing ring 9 is larger than the external diameter of the screw joint 5, the sealing effect can be further enhanced, and the problem of leakage caused by the fact that the bent pipe is arranged on two conveying pipelines is avoided.

5. And after the installation, the appearance of the joint of the elbow and the conveying pipeline is carefully checked to see whether obvious gaps, looseness or damage exist. And in the tightness test, the tightness of the elbow can be tested by adopting a proper method (such as pressure test, air tightness test and the like), so that the elbow is ensured not to leak in the actual use process, and the normal operation of the system is ensured.

Although embodiments of the present utility model 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 therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The elbow with the anti-leakage structure comprises an elbow body (1) and is characterized in that an elbow sleeve (2) is sleeved on the outer side of the elbow body (1), connecting rings (4) are fixed at two ends of the elbow sleeve (2) and the elbow body (1), a screw joint (5) is integrally formed on one side of the connecting rings (4), a first sealing ring (7) is embedded on the surface of the connecting rings (4), and a second sealing ring (9) is embedded on one end, far away from the connecting rings (4), of the screw joint (5).

2. The elbow with the anti-leakage structure according to claim 1, wherein the two ends of the elbow body (1) and the elbow sleeve (2) are respectively inserted with a plug ring (3) at a gap, and the plug rings (3) are integrally formed on the other side of the connecting ring (4).

3. An elbow with leakage preventing structure according to claim 1, wherein the outer diameter of the connecting ring (4) is equal to the outer diameter of the elbow cap (2), and the inner diameter of the connecting ring (4) is equal to the inner diameter of the elbow body (1).

4. The elbow with the leakage preventing structure according to claim 1, wherein the surface of the connecting ring (4) is provided with an embedded groove I (6), the embedded groove I (6) is an annular groove, and the thickness of the sealing ring I (7) is larger than the depth of the embedded groove I (6) after the sealing ring I (7) is fixed on the embedded groove I (6).

5. The elbow with the anti-leakage structure of claim 1, wherein the outer ring surface of the screw joint (5) is provided with external threads, one end of the screw joint (5) far away from the connecting ring (4) is provided with a second embedded groove (8) on the outer ring surface, the second embedded groove (8) is an annular groove, the second sealing ring (9) is sleeved and fixed in the second embedded groove (8), and the outer diameter of the second sealing ring (9) is larger than the outer diameter of the screw joint (5).