Flange connection non-welding stainless steel corrugated compensator

Abstract

The utility model discloses a flange connection non-welding stainless steel corrugated compensator, which structurally comprises a corrugated pipe, flanges, a pull rod and the like, and is mainly characterized in that the flanges at each end of the corrugated pipe are movably sleeved outside the corrugated pipe, and check rings fixed on the corrugated pipe are arranged on the inner sides of the flanges to limit the inward movement of the flanges. The outer side of the flange is provided with a stop piece which is formed by folding the port of the corrugated pipe and is used for limiting the flange from moving outwards and falling off; thus, the flange can be installed outside the corrugated pipe without welding, the flange is prevented from making direct contact with media in the pipe, the situation that when a traditional flange is of a welding structure, corrosion is prone to occurring at the welding position is avoided, the service life is longer, and property loss is reduced; therefore, the improved corrugated compensator can be suitable for food, medical treatment and other environments with high sanitary condition requirements, and can also be suitable for high and low temperature gas, liquid, fire-fighting pipelines and other common use environments. And meanwhile, the mounting position can be adjusted through rotation of the flange, so that the mounting requirement of a special position is met.

Description

Technical Field

[0001] The utility model relates to a stainless steel corrugated compensator, in particular to a flange-connected non-welded stainless steel corrugated compensator. Background Art

[0002] A bellows compensator is a type of pipe compensator that primarily utilizes the effective expansion and contraction of its working body, the bellows, to absorb dimensional changes caused by thermal expansion and contraction in pipelines, conduits, and containers, or to compensate for axial, lateral, and angular displacements. It can also be used to reduce noise and vibration, making it widely used in modern industry. Currently, a bellows compensator primarily consists of a bellows, flanges mounted at each end, and tie rods connecting the flanges. The flanges are typically welded directly to the ends of the bellows. In actual use, the flanges come into direct contact with the medium passing through the pipe at the ends, making the welds susceptible to corrosion. This significantly reduces the service life of the bellows compensator and can also cause financial losses. As a result, the bellows compensator is unsuitable for use in environments with strict hygiene requirements, such as food and medical services, or in more common environments, such as high- and low-temperature gas and liquid pipelines and fire protection pipes. Furthermore, welded flanges cannot be adjusted, making them difficult to install in certain specialized locations. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a flange-connected non-welded stainless steel corrugated compensator which eliminates the flange welding structure, avoids direct contact between the flange and the medium in the pipe and eliminates corrosion at the welding point, can adjust the installation position by rotating the flange, and has a longer service life.

[0004] The technical problem of the utility model is achieved through the following technical solutions:

[0005] A flange-connected non-welded stainless steel bellows compensator includes a bellows, flanges respectively installed at both ends of the bellows and a pull rod connecting the flanges at both ends. The flanges at each end are movably mounted on the outside of the bellows, and a retaining ring fixed to the bellows is provided on the inner side of the flange, and the retaining ring limits the flange from moving inward. The outer side of the flange is provided with a stopper formed by folding the port of the bellows, and the stopper limits the flange from moving outward and falling off.

[0006] Both ends of the corrugated pipe are respectively provided with extension pipes extending outwards in a connected manner, and the extension pipes are cylindrical straight pipes.

[0007] The flange is movably sleeved outside the extension tube, and the retaining ring located on the inner side of the flange is also sleeved outside the extension tube and fixed by welding. The end of the extension tube is folded and folded to form a retaining piece on the outer side of the flange.

[0008] The stopper is a piece of the extension tube that is first folded outward 90 degrees to form an inner folded edge, then folded inward 180 degrees to form an outer folded edge, and the inner and outer folded edges are squeezed and overlapped to form the stopper.

[0009] The outer diameter of the blocking member is larger than the aperture of the flange that is movably sleeved outside the extension tube.

[0010] The aperture formed by the outer folded edge is smaller than or equal to the aperture of the extension tube.

[0011] Compared with the prior art, the present invention mainly movably sleeves the flanges at each end of the bellows on the outside of the bellows, and then provides a retaining ring fixed on the bellows on the inner side of the flange, and the retaining ring is used to limit the inward movement of the flange, and a retaining piece formed by folding the port of the bellows is provided on the outer side of the flange, and the retaining piece is used to limit the outward movement and falling off of the flange; in this way, the flange can be installed on the outside of the bellows without welding, that is, the welding structure of the flange is eliminated, thereby preventing the flange from directly contacting the medium in the pipe, avoiding the corrosion at the welding point when the traditional flange adopts a welding structure, having a longer service life, and reducing property losses. Therefore, the improved bellows compensator can be used in environments with high sanitary conditions such as food and medical care, as well as in ordinary use environments such as high and low temperature gases, liquids and fire protection pipes; at the same time, the installation position can be adjusted by rotating the flange, thereby meeting the installation needs of certain special installation positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a cross-sectional view of the present invention.

[0013] Figure 2 Schematic diagram of the structure of the bellows.

[0014] Figure 3 for Figure 2 Enlarged view of point A.

[0015] Figure 4 This is a cross-sectional view of the flange.

[0016] Figure 5 Schematic diagram of the structure of the ear plate. DETAILED DESCRIPTION

[0017] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0018] like Figures 1 to 5 As shown, 1. bellows, 11. extension tube, 2. flange, 21. center hole, 22. mounting hole, 3. pull rod, 4. nut, 5. retaining ring, 6. stopper, 61. inner folding edge, 62. outer folding edge, 7. ear plate, 71. connecting hole.

[0019] A flange-connected non-welded stainless steel bellows compensator, such as Figure 1 As shown, it is a pipeline compensation element, and its structure mainly includes a bellows 1, flanges 2 respectively installed at both ends of the bellows, and a tie rod 3 connecting the flanges at both ends.

[0020] The bellows 1 is a stainless steel bellows, which can compensate for the displacement of the pipeline caused by temperature difference and pressure difference.

[0021] Both ends of the corrugated tube 1 are provided with extension tubes 11 extending outwards in a continuous body, and the extension tubes are cylindrical straight tubes.

[0022] The flanges 2 at each end are movably mounted on the outside of the bellows 1. Specifically, the flanges 2 are movably mounted on the outside of the extension tube 11. A retaining ring 5 is provided on the inner side of the flange 2. The retaining ring is also mounted on the outside of the extension tube 11 and spot welded to fix it. The retaining ring 5 can limit the inward movement of the flange 2.

[0023] The outer side of the flange 2 is provided with a stopper 6 formed by folding the end of the bellows 1. Specifically, the end of the extension tube 11 is folded to form the stopper 6 on the outer side of the flange 2. The stopper can limit the flange 2 from moving outward and falling off. Therefore, the outer diameter of the stopper 6 needs to be larger than the aperture of the flange 2 that is movably mounted on the outside of the extension tube 11, that is, it needs to be larger than the aperture of the center hole 21 that passes through the flange 2 along the axial centerline.

[0024] In this way, although the flange 2 is restricted from moving axially inward and outward, it can rotate around the extension tube 11, that is, the installation position of the flange 2 can be rotated and adjusted arbitrarily, and the installation is more convenient. Therefore, the installation position can be adjusted by rotating the flange 2 to meet the installation needs of certain special installation positions.

[0025] The stopper 6 is as follows Figure 3 As shown, the end of the extension tube 11 is first folded outward 90° to form an inner folded edge 61, and then the inner folded edge is folded inward 180° to form an outer folded edge 62, and the inner and outer folded edges are squeezed and overlapped to form the stopper 6.

[0026] At the same time, the aperture enclosed by the outer fold 62 needs to be smaller than or equal to the aperture of the extension tube 11, in order to prevent the outer fold 62 from blocking the flow of the medium passing through the pipeline.

[0027] Of course, the processing of the baffle 6 is quite convenient. It is only necessary to extrude the end of the extension tube 11, and the production of the product can be completed without professional skills. In particular, the extruded folded edge 6 covers the sealing surface on the outside of the flange 2. Therefore, during installation, under the extrusion of the reserved flange (not shown in the figure) and the sealing gasket of the adjacent pipe port, it can also participate in the sealing together with the sealing surface on the outside of the flange 2, so that the bellows 1 can better compensate for the displacement of the pipeline caused by temperature difference and pressure difference in the pipeline.

[0028] Each end flange 2 is provided with a plurality of mounting holes 22 , which are evenly distributed in a circle with the middle hole 21 as the center, and mainly serve to connect the corrugated compensator with the reserved flange (not shown) of the adjacent pipe port.

[0029] The outer circumferential surface of each end flange 2 is provided with a plurality of ear plates 7 evenly distributed around the circumference. Each ear plate is welded and fixed to the flange 2. The number of ear plates 7 on the flanges 2 at both ends is equal and the positions are corresponding. Therefore, the ear plates 7 on the flanges 2 at both ends can be connected by the tie rod 3. Figure 1 As shown, the end of the pull rod 3 is directly and adjustably connected to the connecting hole 71 of the ear plate 7 through the nut 4, so the product length can be adjusted and the lifting is convenient through the pull rod 3, and the ear plate 7 mainly plays a guiding role for the pull rod 3.

[0030] The flange 2 of the present invention can be installed on the outside of the bellows 1 without welding, that is, the welding structure of the flange is cancelled, so it can prevent the flange from directly contacting the medium in the pipe, avoid the corrosion at the welding point when the traditional flange adopts a welding structure, extend the service life, reduce property losses, and require less investment, and only conventional processing equipment is needed to complete the product processing.

[0031] Therefore, the improved bellows compensator can be used in environments with high sanitary requirements such as food and medical care, as well as in ordinary use environments such as high and low temperature gases, liquids and fire protection pipelines.

[0032] The above embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. It should also be understood that after reading the contents of the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope of the claims appended hereto.

Claims

1. A flange-connected non-welded stainless steel bellows compensator, comprising a bellows (1), flanges (2) mounted at both ends of the bellows, and a tie rod (3) connecting the flanges at both ends, characterized in that The flange (2) at each end is movably mounted outside the bellows (1), and a retaining ring (5) fixed to the bellows (1) is provided on the inner side of the flange (2), and the retaining ring limits the flange (2) from moving inward, and a retaining member (6) formed by folding the end of the bellows (1) is provided on the outer side of the flange (2), and the retaining member limits the flange (2) from moving outward and falling off.

2. A flange-connected non-welded stainless steel corrugated compensator according to claim 1, characterized in that Both ends of the bellows (1) are provided with extension tubes (11) extending outwards in a continuous body, and the extension tubes are cylindrical straight tubes.

3. A flange-connected non-welded stainless steel corrugated compensator according to claim 2, characterized in that The flange (2) is movably mounted on the outside of the extension tube (11), and the retaining ring (5) located on the inner side of the flange is also mounted on the outside of the extension tube (11) and fixed by welding. The end of the extension tube (11) is folded and folded to form a retaining member (6) on the outside of the flange (2).

4. The flange-connected non-welded stainless steel corrugated compensator according to claim 3 is characterized in that The stopper (6) is a portion of the extension tube (11) that is first folded outwards 90° to form an inner folded edge (61), and then folded inwards 180° to form an outer folded edge (62), and the inner and outer folded edges are squeezed and overlapped to form the stopper (6).

5. The flange-connected non-welded stainless steel corrugated compensator according to claim 3 is characterized in that The outer diameter of the stopper (6) is larger than the diameter of the center hole (21) of the flange (2) which is movably sleeved outside the extension tube (11).

6. The flange-connected non-welded stainless steel corrugated compensator according to claim 4 is characterized in that The aperture formed by the outer folded edge (62) is smaller than or equal to the aperture of the extension tube (11).

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