Novel metal expansion joint

Abstract

The utility model discloses a novel metal expansion joint which comprises a corrugated pipe, an inner pipe, a first flange plate and a second flange plate, the first flange plate and the second flange plate are welded to the two ends of the corrugated pipe, a mounting plate is arranged at one end of the inner pipe, a concave table is arranged at one end of the first flange plate, the inner pipe is arranged in the corrugated pipe in a sliding mode, and a groove is formed in the mounting plate. A connecting screw rod penetrates through the groove and is in threaded connection with the groove, and an internal threaded hole corresponding to the connecting screw rod is formed in the concave table; the device further comprises a supporting assembly, the supporting assembly comprises a first screw rod, a second screw rod and an adjusting sleeve, the first screw rod and the second screw rod are connected with the first flange plate and the second flange plate through threads respectively, and the adjusting sleeve is connected with the other end of the first screw rod and the other end of the second screw rod through threads respectively. The utility model relates to the technical field of expansion joints, and particularly provides a novel metal expansion joint.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion joints, in particular to a novel metal expansion joint. Background Art

[0002] The expansion joint is a flexible structure installed on the container shell or pipeline to compensate for the additional stress caused by temperature difference and mechanical vibration. It has the advantages of reliable operation, good performance and compact structure. It has been widely used in chemical, metallurgical, nuclear energy and other departments.

[0003] The inner tube of the expansion joint may be corroded and damaged during long-term use. Generally, the inner tube is welded to the flange at one end and slides relative to the bellows. It is difficult to remove the inner tube, and gas cutting is required before welding the inner ring. At the same time, the welding quality is affected, which affects the safe use of the expansion joint. In addition, the expansion joint needs to be connected through a welding seat, which cooperates with the threaded pull rod to support the flanges at both ends of the expansion joint during transportation, which increases the production cost. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the welded design of the inner ring of the expansion joint is inconvenient to repair and replace after being damaged, and the welding connection seat also increases the production cost.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: the utility model proposes a new type of metal expansion joint, including a bellows, an inner tube and flange one and flange two welded to the two ends of the bellows, one end of the inner tube is provided with a mounting plate, one end of the flange one is provided with a recessed platform, the inner tube is slidably arranged in the bellows, the mounting plate is provided with a groove, a connecting screw is passed through the groove and is threadedly connected, and the recessed platform is provided with an internal threaded hole corresponding to the connecting screw.

[0006] Preferred technical solution one: also includes a support assembly, which includes screw one, screw two and an adjusting sleeve, wherein screw one and screw two are respectively connected to flange one and flange two through threads, and the adjusting sleeve is respectively connected to the other end of screw one and screw two through threads, and the threaded connection direction between screw one and the adjusting sleeve is opposite to the threaded connection direction between screw two and the adjusting sleeve, and the adjusting sleeve is rotated to pull or support screw one and screw two.

[0007] Preferred technical solution 2: A sealing rubber ring is also provided on the concave platform, and a concave ring is provided on one side of the mounting plate, and the sealing performance is increased by the cooperation between the sealing rubber ring and the concave ring.

[0008] Optimal technical solution three: The connecting screws and internal threaded holes are evenly distributed in multiple groups with the center axis of the flange as the center.

[0009] Preferred technical solution four: the support components are evenly distributed in four groups with the central axis of the flange as the center.

[0010] The utility model proposes a new type of metal expansion joint, which adopts the above structure to achieve the following beneficial effects:

[0011] (1) A mounting plate is provided at one end of the inner tube, and the mounting plate and the concave platform are matched and connected and locked by a connecting screw, instead of welding, which has high production efficiency and is more convenient for replacement in the later stage. The sealing rubber ring and concave ring provided further increase the connection sealing between the inner tube and the flange plate;

[0012] (2) The two sets of flanges can be stably supported by the cooperation of the screw rod 1, the screw rod 2 and the adjusting sleeve, without the need for additional welding of the connecting seat, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 The overall structure of a new type of metal expansion joint proposed by the utility model is shown in FIG. Figure 1 ;

[0015] Figure 2 The overall structure of a new type of metal expansion joint proposed by the utility model is shown in FIG. Figure 2 ;

[0016] Figure 3 The utility model is a schematic diagram of the internal structure of a new type of metal expansion joint proposed by the utility model.

[0017] Among them, 1. bellows, 2. inner tube, 3. flange one, 4. flange two, 5. mounting plate, 6. recessed platform, 7. groove, 8. connecting screw, 9. internal threaded hole, 10. supporting assembly, 11. screw one, 12. screw two, 13. adjusting sleeve, 14. sealing rubber ring, 15. recessed ring. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0020] Embodiment 1

[0021] like Figures 1 to 3 As shown, the technical solution adopted by the utility model is as follows: a new type of metal expansion joint, comprising a bellows 1, an inner tube 2, and a flange 3 and a flange 4 welded to both ends of the bellows 1, a mounting plate 5 is provided at one end of the inner tube 2, a recessed platform 6 is provided at one end of the flange 3, the inner tube 2 is slidably arranged in the bellows 1, a groove 7 is provided on the mounting plate 5, a connecting screw 8 is penetrated through the groove 7 and is threadedly connected, and an internal threaded hole 9 corresponding to the connecting screw 8 is provided on the recessed platform 6; a plurality of connecting screws 8 and internal threaded holes 9 are evenly distributed with the central axis of the flange 3 as the center; a sealing rubber ring 14 is also provided on the recessed platform 6, and a recessed ring 15 is provided on one side of the mounting plate 5, and the sealing performance is increased by the cooperation between the sealing rubber ring 14 and the recessed ring 15.

[0022] Embodiment 2

[0023] Based on the first embodiment, Figure 2 and Figure 3 As shown, it also includes a support assembly 10, which includes a screw rod 11, a screw rod 12 and an adjusting sleeve 13. The screw rod 11 and the screw rod 12 are respectively connected to the flange 13 and the flange 24 through threads, and the adjusting sleeve 13 is respectively connected to the other ends of the screw rod 11 and the screw rod 2 12 through threads. The threaded connection direction of the screw rod 11 and the adjusting sleeve 13 is opposite to the threaded connection direction of the screw rod 2 12 and the adjusting sleeve 13. The adjusting sleeve 13 is rotated to pull or support the screw rod 11 and the screw rod 2 12; the support assembly 10 is evenly distributed with four groups with the central axis of the flange 3 as the center.

[0024] During specific use, the mounting plate 5 is placed on the recessed platform 6, the inner tube 2 slides inside the corrugated tube 1, and the sealing rubber ring 14 is embedded in the recessed ring 15 to increase the sealing performance. Then, the inner tube 2 is stably installed by connecting the screw 8 and the internal threaded hole 9. In order to stably support the two sets of flanges, the screw 11 is connected to the flange 13 and then to the adjusting sleeve 13. The screw 11 is connected to the flange 2 4 and then to the other end of the adjusting sleeve 13. The screw 11 and the screw 2 12 are pulled or supported by rotating the adjusting sleeve 13.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, material or apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, material or apparatus.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel metal expansion joint, comprising a bellows (1), an inner tube (2), and a flange plate 1 (3) and a flange plate 2 (4) welded to both ends of the bellows (1), characterized in that: A mounting plate (5) is provided at one end of the inner tube (2), a recessed platform (6) is provided at one end of the flange plate (3), the inner tube (2) is slidably arranged in the corrugated tube (1), a recessed platform (7) is provided on the mounting plate (5), a connecting screw (8) is passed through the recessed platform (7) and is threadedly connected, and an internal threaded hole (9) corresponding to the connecting screw (8) is provided on the recessed platform (6).

2. A novel metal expansion joint according to claim 1, characterized in that: The invention also comprises a support assembly (10), wherein the support assembly (10) comprises a screw rod 1 (11), a screw rod 2 (12) and an adjusting sleeve (13), wherein the screw rod 1 (11) and the screw rod 2 (12) are respectively connected to the flange plate 1 (3) and the flange plate 2 (4) through threads, and the adjusting sleeve (13) is respectively connected to the other ends of the screw rod 1 (11) and the screw rod 2 (12) through threads.

3. A novel metal expansion joint according to claim 2, characterized in that: A sealing rubber ring (14) is also provided on the concave platform (6), and a concave ring (15) is provided on one side of the mounting plate (5).

4. A novel metal expansion joint according to claim 3, characterized in that: The connecting screws (8) and the internal threaded holes (9) are evenly distributed in multiple groups with the central axis of the flange plate (3) as the center.

5. A novel metal expansion joint according to claim 4, characterized in that: The support components (10) are evenly distributed in four groups with the central axis of the flange plate (3) as the center.

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