Connecting and sealing structure of metal corrugated pipe

Abstract

A metal corrugated pipe connection sealing structure relates to the field of corrugated pipes, and comprises a corrugated pipe butt joint assembly and two corrugated pipe joint assemblies, the two corrugated pipe joint assemblies are respectively arranged at two ends of the corrugated pipe butt joint assembly, the corrugated pipe butt joint assembly comprises a butt joint and two sealing joints, the two sealing joints are arranged at the two ends of the butt joint respectively, and sealing rubber sleeves are arranged on the outer surfaces of the sealing joints. The corrugated pipe connector assembly comprises a locking sleeve and a locking ring, the locking sleeve is connected with the butt joint in a threaded screwing mode, the locking ring is arranged on the inner side of the locking sleeve, and the locking ring is used for locking the outer surface of the corrugated pipe. The locking ring locks corrugations on the outer wall of the corrugated pipe, then the locking ring is inserted into the locking sleeve, finally, the locking sleeve and the butt joint are tightened, the sealing rubber sleeve clamps and isolates the inner wall and the outer wall of the corrugated pipe, and the sealing connection effect of the corrugated pipe is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bellows, in particular to a metal bellows connection sealing structure. Background Art

[0002] Bellows are used in various industrial and civil fields, such as municipal water supply and drainage, petrochemical, power and communication, etc. The stable operation of the pipeline system is crucial. Due to its unique structural characteristics, bellows can compensate for the thermal expansion and contraction of the pipeline, absorb vibration, and adapt to the displacement changes of the pipeline, thereby effectively ensuring the safety and reliability of the pipeline system.

[0003] However, the connection of the bellows has always been a key issue in engineering. Due to the structural characteristics of the bellows, its connection needs to solve the problem of sealing. Traditional connection methods, such as welding and flange connection, are difficult to disassemble and assemble. This affects the convenience of using the bellows to a certain extent. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] Therefore, the purpose of the utility model is to provide a metal bellows connection sealing structure to improve the sealing connection effect of the bellows.

[0006] To achieve the above-mentioned purpose, the utility model proposes a metal bellows connection sealing structure, comprising a bellows butt assembly and two bellows joint assemblies, wherein the two bellows joint assemblies are respectively arranged at the two ends of the bellows butt assembly, the bellows butt assembly comprises a butt joint and two sealing joints, wherein the two sealing joints are respectively arranged at the two ends of the butt joint, a sealing rubber sleeve is arranged on the outer surface of the sealing joint, the bellows joint assembly comprises a locking sleeve and a locking ring, wherein the locking sleeve is threadedly screwed to the butt joint, the locking ring is arranged on the inner side of the locking sleeve, and the locking ring is used to lock the outer surface of the bellows.

[0007] Furthermore, an annular step is provided at the bottom of the inner wall of the locking sleeve, and the annular step and the end face of the locking ring are matched with each other.

[0008] Furthermore, an outer hexagonal sleeve and a tightening handle are arranged on the outside of the locking sleeve.

[0009] Furthermore, the locking ring is a C-shaped structure and is provided with a shrinkage notch, and the inner wall of the locking ring is provided with locking grooves for locking the corrugations on the outer surface of the corrugated pipe.

[0010] Furthermore, the outer surface of the sealing joint is a truncated cone side wall structure, and an extended rubber ring is provided at the bottom of the sealing rubber sleeve.

[0011] Furthermore, a butt joint handle is provided in the middle of the butt joint, and a through groove is provided in the two sealing joints and the inside of the butt joint.

[0012] Beneficial effect: The utility model inserts the bellows into the locking ring, the locking ring locks the corrugations of the outer wall of the bellows, then the locking ring is inserted into the locking sleeve, and finally the locking sleeve and the butt joint are tightened, and the sealing rubber sleeve clamps and isolates the inner and outer walls of the bellows, thereby improving the sealing connection effect of the bellows.

[0013] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0015] Figure 1 It is a schematic diagram of the overall structure of a metal bellows connection sealing structure according to an embodiment of the utility model;

[0016] Figure 2 It is a front cross-sectional view of a metal bellows connection sealing structure according to an embodiment of the utility model;

[0017] Figure 3 The figure is a schematic structural diagram of a locking ring in a metal bellows connection sealing structure according to an embodiment of the utility model.

[0018] As shown in the figure: 1. Bellows joint assembly; 11. Bellows inlet; 12. External hexagonal sleeve; 13. Locking sleeve; 14. Tightening handle; 15. Locking ring; 151. Shrinkage notch; 152. Locking tooth groove; 2. Bellows docking assembly; 21. Butt joint; 22. Butt handle; 23. Sealing joint; 24. Sealing rubber sleeve; 241. Extension rubber ring; 25. Through groove; 3. Bellows. DETAILED DESCRIPTION

[0019] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention. On the contrary, the embodiments of the present invention include all changes, modifications, and equivalents that fall within the spirit and connotation of the appended claims.

[0020] The metal bellows connection sealing structure of the embodiment of the utility model is described below with reference to the accompanying drawings.

[0021] like Figure 1-Figure 3 As shown, the metal bellows connection sealing structure provided by the embodiment of the utility model includes a bellows docking assembly 2 and two bellows joint assemblies 1, wherein the two bellows joint assemblies 1 are respectively arranged at both ends of the bellows docking assembly 2, and the bellows docking assembly 2 includes a docking joint 21 and two sealing joints 23, wherein the two sealing joints 23 are respectively arranged at both ends of the docking joint 21, and the outer surface of the sealing joint 23 is provided with a sealing rubber sleeve 24.

[0022] The bellows joint assembly 1 includes a locking sleeve 13 and a locking ring 15 , wherein the locking sleeve 13 is threadedly connected to the butt joint 21 , and the locking ring 15 is arranged on the inner side of the locking sleeve 13 , and the locking ring 15 is used to lock the outer surface of the bellows 3 .

[0023] Specifically, first, the bellows 3 is passed through the bellows inlet 11 on the inner side of the locking sleeve 13, and then the locking ring 15 is opened, and the end of the bellows 3 is inserted into the locking ring 15. The locking ring 15 elastically recovers to wrap and lock the corrugations of the outer wall of the bellows 3, and then the locking ring 15 is inserted into the locking sleeve 13. Finally, the locking sleeve 13 and the sealing joints 23 at both ends of the butt joint 21 are tightened, and the locking sleeve 13 pushes the locking ring 15 to fit tightly against the sealing rubber sleeve 24 on the sealing joint 23. The sealing rubber sleeve 24 clamps and isolates the inner and outer walls of the bellows 3 to improve the sealing connection effect of the bellows 3, and the two bellows 3 are respectively installed at the two ends of the butt joint 21 to achieve sealed docking of the two bellows 3.

[0024] In one embodiment of the present invention, Figure 2 As shown, an annular step is provided at the bottom of the inner wall of the locking sleeve 13, and the annular step is adapted to the end face of the locking ring 15. During the process of the locking sleeve 13 and the sealing joint 23 being threadedly rotated and advanced, the inner side of the locking sleeve 13 pushes the locking ring 15 toward the sealing joint 23 through the annular step, so that the end of the bellows 3 is tightly attached to the sealing rubber sleeve 24 on the sealing joint 23.

[0025] In one embodiment of the present invention, Figure 1 As shown, an outer hexagonal sleeve 12 and a tightening handle 14 are arranged on the outside of the locking sleeve 13 to assist in tightening the locking sleeve 13 .

[0026] In one embodiment of the present invention, Figure 3As shown, the locking ring 15 is a C-shaped structure and is provided with a shrinkage notch 151, which is convenient for expanding the inner diameter of the locking ring 15 and clamping the bellows 3 therein. The inner wall of the locking ring 15 is provided with a locking groove 152 for locking the corrugations on the outer surface of the bellows 3. After the locking ring 15 holds the bellows 3 tightly, the locking groove 152 is used to bite the corrugations on the outer wall of the bellows 3. When the locking ring 15 is inserted into the locking sleeve 13, the diameter of the locking ring 15 is limited, thereby locking the outer wall of the bellows 3.

[0027] In one embodiment of the present invention, Figure 2 As shown, the outer surface of the sealing joint 23 is a truncated cone side wall structure. In the process of the bellows 3 constantly approaching the sealing joint 23, the inner wall of the bellows 3 is constantly in close contact with the inclined sealing joint 23, thereby improving the contact tightness between the bellows 3 and the sealing rubber sleeve 24. An extended rubber ring 241 is provided at the bottom of the sealing rubber sleeve 24. In the process of the bellows 3 constantly approaching the sealing joint 23, the end of the bellows 3 is in close contact with the extended rubber ring 241, thereby playing a role of secondary sealing and improving the sealing connectivity of the bellows 3.

[0028] In one embodiment of the present invention, Figure 1 As shown, a docking handle 22 is provided in the middle of the docking joint 21 to facilitate the tightening of the docking joint 21 and the locking sleeve 13. A through groove 25 is provided inside the two sealing joints 23 and the docking joint 21 for fluid circulation.

[0029] In order to clearly explain the above embodiments, refer to Figure 1-Figure 3 The specific working principle of the metal bellows connection sealing structure of the utility model is as follows: when in use, first pass the bellows 3 through the locking sleeve 13, then break it outward along the shrinkage notch 151 of the locking ring 15, open the locking ring 15, then insert the end of the bellows 3 into the locking ring 15, then loosen the locking ring 15, and the locking ring 15 elastically recovers to wrap the corrugations of the outer wall of the bellows 3.

[0030] Then, the locking ring 15 is inserted into the locking sleeve 13, the diameter of the locking ring 15 is limited, and the outer wall of the bellows 3 is locked. Then, the locking sleeve 13 and the sealing joint 23 are threadedly rotated and pushed forward, and the inner side of the locking sleeve 13 pushes the locking ring 15 toward the sealing joint 23 through the annular step, so that the end of the bellows 3 is tightly attached to the sealing rubber sleeve 24 on the sealing joint 23.

[0031] As the bellows 3 approaches the sealing joint 23, the inner wall of the bellows 3 and the sealing joint 23 are continuously stretched tight, and the end of the bellows 3 is finally in close contact with the extended rubber ring 241, which plays a secondary sealing role and improves the sealing connectivity of the bellows 3. Finally, the two bellows 3 are respectively installed at the two ends of the butt joint 21 to achieve sealed docking of the two bellows 3.

[0032] In summary, the metal bellows connection sealing structure of the embodiment of the utility model is achieved by inserting the bellows into the locking ring, which locks the corrugations of the outer wall of the bellows, and then inserting the locking ring into the locking sleeve. Finally, the locking sleeve and the butt joint are tightened, and the sealing rubber sleeve clamps and isolates the inner and outer walls of the bellows, thereby improving the sealing connection effect of the bellows.

[0033] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and deform the above embodiments within the scope of the present invention.

Claims

1. A metal bellows connection sealing structure, characterized in that: The invention comprises a bellows butt joint assembly (2) and two bellows joint assemblies (1), wherein the two bellows joint assemblies (1) are respectively arranged at two ends of the bellows butt joint assembly (2), and the bellows butt joint assembly (2) comprises a butt joint (21) and two sealing joints (23), wherein the two sealing joints (23) are respectively arranged at two ends of the butt joint (21), and the outer surface of the sealing joint (23) is provided with a sealing rubber sleeve (24); The bellows joint assembly (1) comprises a locking sleeve (13) and a locking ring (15), wherein the locking sleeve (13) is threadedly connected to the butt joint (21), and the locking ring (15) is arranged on the inner side of the locking sleeve (13), and the locking ring (15) is used to lock the outer surface of the bellows (3).

2. The metal bellows connection sealing structure according to claim 1, characterized in that: The bottom of the inner wall of the locking sleeve (13) is provided with an annular step, and the annular step and the end surface of the locking ring (15) are mutually adapted.

3. The metal bellows connection sealing structure according to claim 2, characterized in that: An external hexagonal sleeve (12) and a tightening handle (14) are arranged outside the locking sleeve (13).

4. The metal bellows connection sealing structure according to claim 1, characterized in that: The locking ring (15) is of a C-shaped structure and is provided with a shrinkage notch (151); the inner wall of the locking ring (15) is provided with a locking tooth groove (152) for locking the corrugations on the outer surface of the corrugated tube (3).

5. The metal bellows connection sealing structure according to claim 1, characterized in that: The outer surface of the sealing joint (23) is a truncated cone side wall structure, and an extended rubber ring (241) is provided at the bottom of the sealing rubber sleeve (24).

6. The metal bellows connection sealing structure according to claim 1, characterized in that: A docking handle (22) is provided at the middle position of the docking joint (21), and a through groove (25) is provided inside the two sealing joints (23) and the docking joint (21).

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