A flexible flange structure

Abstract

This invention provides a flexible flange structure comprising two sleeve flanges and an annular silicone cloth. Each sleeve flange includes a sleeve portion. The annular silicone cloth is formed by shearing a flat material and is bent along the outer periphery of the sleeve portion to form a cylindrical structure. The axial ends of the annular silicone cloth are respectively fitted onto the outer periphery of the two sleeve portions. The sleeve portions and the annular silicone cloth are riveted together. The two axially extending sides of the annular silicone cloth are connected by a fixing adhesive layer. A first sealing adhesive layer is provided between the inner side of the annular silicone cloth and the sleeve portion. This flexible flange structure bends the annular silicone cloth along the outer periphery of the sleeve portion to form a cylindrical structure, and the axial ends of the annular silicone cloth are respectively fitted onto the outer periphery of the two sleeve portions. This means the annular silicone cloth can be bent and formed to fit the dimensions of the sleeve flanges, resulting in very small installation deviations, high compatibility of the installation connection, and low requirements for the manufacturing precision of the sleeve flanges and the cylindrical structure.

Description

Technical Field

[0001] This utility model relates to the field of flange structures, and in particular to a flexible flange structure. Background Technology

[0002] Flexible flange structure is a specially designed flange connection method. Its core feature is that it compensates for installation errors, thermal expansion or vibration-induced displacement through elastic deformation, while maintaining sealing performance.

[0003] Most existing flexible flange structures first manufacture a flexible cylindrical section with a fixed inner diameter, and then fix the corresponding flange rings at both ends of the flexible cylindrical section. However, because the inner diameter of the flexible cylindrical section is fixed, its compatibility with the flange rings is low, and the manufacturing precision requirements for the flexible cylindrical section and the flange rings are high. Otherwise, it will affect the tightness and sealing of the connection between the flexible cylindrical section and the flange rings.

[0004] Therefore, it is necessary to provide a flexible flange structure to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a flexible flange structure.

[0006] This utility model provides a flexible flange structure, including two sleeve flange rings and an annular silicone cloth. The sleeve flange ring includes a sleeve portion and a planar connecting portion vertically disposed at one end of the sleeve portion. The annular silicone cloth is formed by cutting a flat material. The annular silicone cloth is bent along the outer periphery of the sleeve portion to form a cylindrical structure, and the two axial ends of the annular silicone cloth are respectively sleeved on the outer periphery of the two sleeve portions. The sleeve portion and the annular silicone cloth are riveted together. The two axially extending sides of the annular silicone cloth are connected by a fixing adhesive layer. A first sealing adhesive layer is provided between the inner side of the annular silicone cloth and the sleeve portion.

[0007] Preferably, the two ends of the annular silicone cloth are stacked and connected by metal wire stitching.

[0008] Preferably, a second sealant layer is provided along the stitching path of the metal wire.

[0009] Preferably, the stitching path of the metal wire includes two circumferential paths extending in the circumferential direction and an axial path connecting the two circumferential paths.

[0010] Preferably, the annular silicone cloth has fixing rings fitted around its two outer peripheries, the fixing rings being opposite to the sleeve portion, and the rivets passing through the fixing rings, the annular silicone cloth, and the sleeve portion to form a riveting connection.

[0011] Preferably, the ends of the fixing ring and the annular silicone cloth are in contact with the planar connecting portion.

[0012] Preferably, the planar connection between the two sleeve flanges is connected by at least two screw assemblies.

[0013] Preferably, the screw assembly includes a fully threaded bushing and nuts. The planar connecting portion is provided with mounting holes. The two ends of the fully threaded bushing pass through the mounting holes of the two planar connecting portions respectively. Each end of the fully threaded bushing is connected to two nuts, and the two nuts are clamped on both sides of the planar connecting portion.

[0014] Preferably, the sleeve flange is round or square.

[0015] Preferably, the silicone cloth is a fire-resistant soft cloth formed by coating glass fiber with silicone.

[0016] Compared with related technologies, the present invention provides the following beneficial effects: The flexible flange structure of this utility model bends the annular silicone cloth along the outer periphery of the sleeve to form a cylindrical structure, and the two axial ends of the annular silicone cloth are respectively sleeved on the outer periphery of the two sleeves. That is, the annular silicone cloth can be bent and formed to adapt to the size of the sleeve flange ring and form a connection. The installation deviation is very small, the installation connection has high compatibility, and the manufacturing precision requirements of the sleeve flange ring and the cylindrical structure are low.

[0017] Using annular silicone cloth as a flexible connection element, the flexible connection design can effectively absorb thermal expansion, vibration and installation errors in the pipeline system, and avoid damage to rigid flanges due to stress concentration.

[0018] The two sleeve flanges are symmetrically arranged and, together with the screw assembly, can achieve a tight connection and molding of the sleeve flanges and the annular silicone cloth. This also makes the overall structure less prone to deformation during transportation, ensuring product quality. The screw assembly is removed during actual installation so that the sleeve flanges can be used for installation and connection with the corresponding equipment.

[0019] The flexible flange structure employs a composite fixing method using rivets, retaining rings, wire stitching, and first and second sealing layers, resulting in high overall connection strength, strong pull-out resistance, and structural stability. Attached Figure Description

[0020] Figure 1 This is a schematic cross-sectional view of the overall structure of this utility model; Figure 2 This is a schematic diagram of the circular structure of the sleeve flange ring of this utility model; Figure 3 This is a schematic diagram of the square structure of the sleeve flange ring of this utility model; Figure 4 This is a schematic diagram showing the location of the sealant layer in this utility model; Figure 5 A schematic diagram of the stitching path for the annular silicone cloth seam of this utility model.

[0021] The following are the labels in the diagram: 1. Sleeve flange ring; 2. Annular silicone cloth; 3. Sleeve part; 4. Flat connection part; 5. Rivet; 6. Screw assembly; 7. Fully threaded bushing; 8. Nut; 9. Mounting hole; 10. Retaining ring; 11. First sealant layer; 12. Second sealant layer. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Please refer to the following: Figures 1 to 5 A flexible flange structure includes two symmetrically arranged sleeve flange rings 1 and a section of annular silicone cloth 2. Each sleeve flange ring 1 consists of a sleeve portion 3 and a planar connecting portion 4. The sleeve portion 3 is a hollow tubular structure, and the planar connecting portion 4 is perpendicularly connected to one circumferential end of the sleeve portion 3, forming an overall "T"-shaped cross-section structure, which can be used for connection with other pipes or equipment. The two sleeve flange rings 1 are arranged opposite each other through their planar connecting portions 4, forming a symmetrical structure.

[0024] The annular silicone cloth 2 is initially a flat material. It is a fire-resistant soft cloth made of glass fiber base cloth coated with high-temperature resistant silicone, which has excellent heat resistance, corrosion resistance and fire resistance. The annular silicone cloth 2 is bent along the outer periphery of the sleeve part 3 to form a cylindrical structure, and the two axial ends of the annular silicone cloth 2 are respectively sleeved on the outer periphery of the sleeve part 3 of the two sleeve flange rings 1, and are fixedly connected to the sleeve part 3 by rivets 5.

[0025] The initial raw material of the annular silicone cloth 2 is bent and wrapped around the outer circumference of the sleeve portion 3 of the two sleeve flange rings 1, and then the initial raw material can be cut.

[0026] After cutting, the two ends of the annular silicone cloth 2 extending axially are connected by a fixing adhesive layer. The two ends of the annular silicone cloth 2 are stacked, and the areas between the stacks are connected by a fixing adhesive layer. Please refer to... Figure 4 In the contact area between the annular silicone cloth 2 and the sleeve part 3, a first sealing layer 11 is provided on its inner side to enhance the sealing of the connection and prevent media leakage.

[0027] Please refer to Figure 5, the two circumferential ends of the annular silica gel cloth 2 are in an overlapping lap joint state when bent into a cylindrical body, and the lap joint area is sewn and fixed by metal wires to improve the strength and reliability of the circumferential connection. The stitching path of the metal wires comprises two parallel stitching lines extending along the circumferential direction of the annular silica gel cloth, and an axial stitching segment connecting the two circumferential stitching lines. A closed "日"-shaped stitching structure or a closed "目"-shaped stitching structure can be formed, ensuring that the lap joint area is firm and sealed. Please refer to Figure 5 , a second sealant layer 12 is further coated along the stitching path of the metal wires, which further improves the sealing performance of the circumferential joint and prevents gas or liquid from seeping out of the joint.

[0028] In order to enhance the structural stability of the axial connection, fixing rings 10 are further sleeved on the outer periphery of the two axial ends of the annular silica gel cloth 2, and the fixing rings 10 are arranged opposite to the sleeve portions 3 in the axial direction. Rivets 5 sequentially pass through the fixing ring 10, the annular silica gel cloth 2 and the side wall of the sleeve portion 3, and firmly connect the three into one piece by means of riveting. The end face of the fixing ring 10 and the end portion of the annular silica gel cloth 2 are both in contact with the end face of the planar connecting portion 4 of the sleeve flange ring 1, thereby providing stable support and limiting in the axial direction.

[0029] Please refer to Figure 1 , the axial connection between the two sleeve flange rings 1 is achieved by at least two screw assemblies 6. Each screw assembly 6 comprises a fully threaded lining rod 7 and a plurality of nuts 8. Mounting holes 9 are correspondingly formed on the planar connecting portions 4 of the two sleeve flange rings 1, the fully threaded lining rod 7 passes through the mounting holes 9 on the planar connecting portions 4 at both sides, and two nuts 8 are installed at each end, so that the two nuts 8 are respectively located on the inner and outer sides of the planar connecting portion 4. By tightening the nuts 8, the two planar connecting portions 4 are clamped and fixed, thereby realizing the detachable connection of the flange structure, and allowing a certain degree of axial adjustment and flexible compensation.

[0030] The cross section of the sleeve flange ring 1 can be designed as circular or square to meet the connection requirements of different pipe joints. Through the flexible deformation capability of the silica gel cloth, the overall structure can effectively absorb vibration, thermal expansion and cold contraction displacement and installation deviation in the pipeline system, and is suitable for occasions requiring flexible connection such as ventilation, smoke exhaust and industrial pipelines.

[0031] In the flexible flange structure of this embodiment, the annular silica gel cloth is bent along the outer periphery of the sleeve portion to form a cylindrical structure, and the two axial ends of the annular silica gel cloth are respectively sleeved on the outer periphery of the two sleeve portions, that is, the annular silica gel cloth can be bent and formed according to the size of the sleeve flange ring to form a connection, with very small installation deviation, high installation connection compatibility, and low requirements on the manufacturing precision of the sleeve flange ring and the cylindrical structure.

[0032] The two sleeve flanges are symmetrically arranged and, together with the screw assembly, can achieve a tight connection and molding of the sleeve flanges and the annular silicone cloth. This also makes the overall structure less prone to deformation during transportation, ensuring product quality. The screw assembly is removed during actual installation so that the sleeve flanges can be used for installation and connection with the corresponding equipment.

[0033] The flexible flange structure achieves excellent sealing performance, structural strength, and flexible compensation capabilities through the coordinated operation of the sleeve flange ring, annular silicone cloth, riveting structure, stitched connection, sealing adhesive layer, and screw assembly. The flexible connection design effectively absorbs thermal expansion, vibration, and installation errors in the piping system, preventing damage to rigid flanges due to stress concentration. It offers advantages such as convenient installation, high temperature resistance, fire resistance, and aging resistance.

[0034] The manufacturing process of the flexible flange structure of this utility model can be as follows: The sleeve flange ring 1 is made of standard angle steel.

[0035] Manufacturing process of circular sleeve flange 1: Angle steel rolling: A standard length of angle steel is rolled into a spiral blank of the required arc using a rolling machine.

[0036] Angle steel is rolled into a circle and then cut: The arc-shaped spiral blank is cut according to the dimensions required by the drawing to form individual open arc-shaped semi-finished flanges.

[0037] After the angle steel is rolled and cut, it is shaped: The open-type arc-shaped semi-finished product is shaped using a flange inner diameter fixture and a four-jaw chuck. The specific operation is as follows: the inner ring of the semi-finished flange is placed outside the flange inner diameter fixture, and the outer ring is placed inside the four-jaw chuck. The opening of the angle steel arc ring is gradually tightened by the four jaws until its inner arc fits tightly with the flange inner diameter fixture to ensure dimensional accuracy.

[0038] Welding after shaping: Weld the opening while it is in the shaped state to fix the final size and obtain the semi-finished sleeve flange ring 1.

[0039] Weld finishing: Grind the semi-finished sleeve flange ring 1 after welding to remove weld marks and make its surface smooth.

[0040] Machining flange mounting holes 9: Use a circular CNC punching machine to machine mounting holes 9 on the flat connection part 4, and inspect them with a flange hole distance and hole diameter gauge to ensure accurate hole position.

[0041] Surface treatment: After the hole machining is completed, sandblasting and painting are performed to finally obtain the finished circular sleeve flange ring 1.

[0042] Manufacturing process of square sleeve flange ring 1: Angle steel cutting: Cut the angle steel according to the dimensions in the drawing, and prepare two pieces for each of the long side and the wide side.

[0043] Machining of mounting holes 9: Machining mounting holes 9 on the long and wide sides of the angle steel on a strip angle steel punching machine, and using a flange hole distance and hole diameter gauge to check the hole position accuracy.

[0044] Joint cutting treatment: When the long side and the wide side angle steel are spliced ​​at a right angle, the overlapping part is cut to ensure that the splice is flat.

[0045] Flange splicing and welding: Two long angle steels and two wide angle steels are spliced ​​and welded together under the positioning of the flange hole spacing and diameter gauge to form a square frame structure.

[0046] Weld finishing: Grind the semi-finished sleeve flange ring 1 after welding to remove weld burrs and ensure a smooth surface.

[0047] Surface treatment: Finally, sandblasting and painting are performed to obtain the finished square sleeve flange ring 1.

[0048] Fan circular flexible connection assembly: Prepare the following components for assembly: 2 sleeve flange rings, 1 finished product, adhesive, silicone cloth, 2 retaining rings, 5 rivets, metal needles and wires, adhesive syringe, etc.

[0049] Step 1: Assembly of a finished sleeve flange ring 1 and silicone cloth 2 Calculate and cut the silicone cloth 2 to the dimensions (including the overlapping part of the interface) according to the drawing.

[0050] Lay the silicone cloth 2 flat on the workbench, and apply adhesive evenly to the areas at both ends that need to mate with the sleeve part 3.

[0051] Connect the two sleeve flanges 1 using a fully threaded liner 7 and multiple nuts 8. Wrap silicone cloth 2 around the outer wall of the sleeve portion 3 of the two sleeve flanges 1. Manually press, compact, and flatten one end of the silicone cloth 2 to the predetermined position.

[0052] Roll around the sleeve part 3 once to form a cylinder with the silicone cloth 2, so that the two ends of the silicone cloth 2 overlap in the axial direction and are connected with a fixing adhesive layer.

[0053] Use a clamp to press and flatten the overlapping parts to bond and shape the silicone cloth 2 to the outer wall of the sleeve part 3, and let it stand for several minutes.

[0054] Step 2: Secure rivet 5 to the retaining ring. Use the pre-cut retaining rings to press down the bonding areas between the two ends of the silicone cloth 2 and the sleeve part 3.

[0055] Through holes are drilled in the retaining ring, silicone cloth 2, and sleeve part 3 using a drilling machine.

[0056] Use a rivet gun to pass the rivet 5 through the retaining ring 10 (if already installed), the retaining ring, the silicone cloth 2, and the sleeve part 3 for riveting and fixing. The rivets 5 are evenly distributed along the circumference.

[0057] The other end is riveted using the same process.

[0058] Step 3: Sew the overlapping parts of the silicone cloth joints. After the riveting is completed, the overlapping area of ​​the silicone cloth circumferential joint is reinforced by sewing with metal wire and metal needle.

[0059] Using an adhesive syringe, inject the second sealant layer 12 of adhesive profile into both the inner and outer sides of the suture line to prevent the medium from leaking from the joint and ensure a firm seal at the joint.

[0060] Step 4: Re-treatment of internal gaps with adhesive Using an adhesive syringe, adhesive is injected into the gap (along the inner circumference) between the silicone cloth 2 and the sleeve 3 at both ends of the flexible flange structure 1 to form a first sealing layer 11, which further enhances the sealing performance and prevents media leakage during operation.

[0061] The assembly process for the square flexible connection of the fan is basically the same as that for the round one. The only difference is that the silicone cloth 2 is adapted and adjusted according to the square structure during the cutting, bonding and pressing process. The rest of the process is the same.

[0062] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A flexible flange structure, characterized by, It includes two sleeve flanges (1) and an annular silicone cloth (2). The sleeve flange (1) includes a sleeve part (3) and a planar connecting part (4) vertically arranged at one end of the sleeve part (3). The annular silicone cloth (2) is formed by cutting a flat material. The annular silicone cloth (2) is bent along the outer periphery of the sleeve part (3) to form a cylindrical structure. The two axial ends of the annular silicone cloth (2) are respectively sleeved on the outer periphery of the two sleeve parts (3). The sleeve part (3) and the annular silicone cloth (2) are riveted by rivets (5). The two axially extending sides of the annular silicone cloth (2) are connected by a fixing adhesive layer. A first sealing adhesive layer is provided between the inner side of the annular silicone cloth (2) and the sleeve part (3).

2. The flexible flange structure of claim 1, wherein The annular silicone cloth (2) is stacked at both ends in the circumferential direction and connected by metal wire stitching.

3. A flexible flange structure according to claim 2, wherein A second sealant layer (12) is provided along the stitching path of the metal wire.

4. A flexible flange structure according to claim 3, wherein The stitching path of the metal wire includes two circumferential paths extending in the circumferential direction and an axial path connecting the two circumferential paths.

5. The flexible flange structure of claim 1, wherein The annular silicone cloth (2) has a fixing ring (10) sleeved on both ends of its outer periphery. The fixing ring (10) is opposite to the sleeve part (3). The rivet (5) passes through the fixing ring (10), the annular silicone cloth (2) and the sleeve part (3) to form a riveting connection.

6. A flexible flange structure according to claim 5, wherein The ends of the fixing ring (10) and the annular silicone cloth (2) are in contact with the planar connecting part (4).

7. The flexible flange structure of claim 1, wherein The two sleeve flanges (1) are connected by at least two screw assemblies (6) through their planar connection (4).

8. A flexible flange structure according to claim 7, wherein The screw assembly (6) includes a fully threaded bushing (7) and nuts (8). The planar connecting part (4) is provided with mounting holes (9). The two ends of the fully threaded bushing (7) pass through the mounting holes (9) of the two planar connecting parts (4) respectively. Each end of the fully threaded bushing (7) is connected to two nuts (8). The two nuts (8) are clamped on both sides of the planar connecting part (4).

9. The flexible flange structure of claim 1, wherein The sleeve flange (1) is round or square.

10. The flexible flange structure of claim 1, wherein The silicone cloth is a fire-resistant soft cloth formed by coating glass fiber with silicone.

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