Pipeline connecting flange

Abstract

The utility model relates to the technical field of flanges, in particular to a pipeline connecting flange which comprises a flange assembly, the flange assembly comprises a left side flange and a right side flange corresponding to the left side flange, a groove is formed in the right side of the left side flange, a protrusion is arranged on the left side of the right side flange, a sealing ring is arranged between the groove and the protrusion, and an alignment groove is formed in the upper end of the left side flange. Conical pipes are arranged at the left end of the left side flange and the right end of the right side flange correspondingly. According to the device, the conical pipes are welded to the left end and the right end of the flange assembly, so that pipelines of different sizes are welded to the outer portion of the flange assembly, the use scenes of the flange assembly are increased, and the situation that when a fixing assembly is used for fixing, the positions of a first penetrating hole and a second penetrating hole are adjusted is avoided through insertion matching of an alignment block and an alignment groove; the sealing ring is arranged between the protrusion and the groove to increase the air tightness of the flange assembly, meanwhile, the insection is further arranged at the top end of the protrusion, the contact area of the protrusion and the sealing ring is increased, and the air tightness of the flange assembly is further improved.

Description

Technical Field

[0001] This utility model relates to the field of flange technology, specifically a pipe connection flange. Background Technology

[0002] In the field of pipeline engineering, flanges are important connecting components in pipeline systems and have a wide range of applications. Especially in harsh environments such as high temperature and high pressure, the reliability and stability of their connection are crucial. Although traditional flange connection methods are effective, they generally have problems such as inconvenient installation and removal and unstable sealing performance. Therefore, a new type of pipeline connection flange has emerged.

[0003] Utility model patent CN219432700U discloses a pipe connection flange, including a first flange and a fixing device. A first pipe is fixedly connected to the surface of the first flange. A threaded rod is inserted into the internal threads of the first flange. A second flange is threaded into the surface of the threaded rod. A second pipe is fixedly connected to the end of the second flange away from the first flange. Nuts are threaded to both ends of the threaded rod. A sealing gasket abuts against the ends of the first flange and the second flange that are close to each other. A protective device is installed on the first flange by means of the fixing device. The protective device includes a slide rail, and a slider is slidably connected to the surface of the slide rail.

[0004] The above technical solution can protect the sealing gasket between the first and second flanges by blocking it, preventing the gasket from aging due to wind and sun exposure, which could lead to gasket failure and affect the sealing performance between the first and second flanges. However, in actual use, the device can only connect pipes of a fixed size, limiting its application scenarios. Furthermore, the device lacks alignment settings, requiring constant adjustment of the fixing holes on both flanges to the appropriate positions when using bolts for fixing, making the operation complex and resulting in poor airtightness between the flanges. Utility Model Content

[0005] The purpose of this utility model is to provide a prefabricated cabin ventilation and heat dissipation device to solve the problem of the pipe connection flange mentioned in the background art (authorization announcement number CN219432700U). However, in actual use, the device can only connect pipes of a fixed size, which limits its application scenarios. At the same time, the device has no alignment setting, and when using bolts for fixing, it is necessary to continuously adjust the fixing holes of the flanges on both sides to the appropriate position, which is complicated to operate and results in poor airtightness between the flanges.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A pipe connection flange includes a flange assembly and a fixing assembly disposed above the flange assembly. The flange assembly includes a left flange and a right flange corresponding to the left flange. The right side of the left flange has a groove, and the left side of the right flange has a protrusion. A sealing ring is disposed between the groove and the protrusion. The upper end of the left flange has an alignment groove, and the right flange has an alignment block disposed at a position corresponding to the alignment groove. The left end of the left flange and the right end of the right flange both have tapered tubes. The fixing assembly includes bolts and nuts on the bolts.

[0008] Preferably, the width of the outer wall of the left flange is the same as that of the right flange.

[0009] In this invention, by setting left and right flanges with the same width on the outer wall, the overall appearance is more aesthetically pleasing, and the connection between the left and right flanges is tighter.

[0010] Preferably, the protrusion and the right flange are integrally formed, and the width of the inner wall of the groove is adapted to the width of the outer wall of the protrusion, and the groove and the protrusion are interlocked.

[0011] In this invention, the protrusion and the right flange are integrally formed, making the connection between the protrusion and the right flange more secure. At the same time, the width of the inner wall of the groove is matched with the width of the outer wall of the protrusion, and the insertion fit between the groove and the protrusion increases the airtightness of the connection between the left flange and the right flange.

[0012] Preferably, the top of the protrusion is provided with equally spaced teeth.

[0013] In this invention, by setting serrations at the top of the protrusion, the contact area between the protrusion and the sealing ring is increased, thereby enhancing the airtightness between the protrusion and the groove.

[0014] Preferably, the sealing ring is made of polytetrafluoroethylene material, the outer surface of the sealing ring is in close contact with the inner wall of the groove, and the thickness of the sealing ring is less than the depth of the groove.

[0015] In this invention, the sealing ring is made of polytetrafluoroethylene (PTFE), which has high strength deformation and corrosion resistance. It can continue to work in strong acid and alkali environments, increasing the service life of the flange assembly. At the same time, the sealing ring fits tightly with the groove, further increasing the airtightness between the groove and the protrusion. The thickness of the sealing ring is less than the depth of the groove, avoiding the sealing ring being too thick and affecting the insertion effect between the groove and the protrusion.

[0016] Preferably, the alignment groove and the alignment block are inserted into each other, and the inner wall of the alignment groove is in close contact with the outer surface of the alignment block.

[0017] In this invention, the alignment groove and alignment block are inserted and matched, which makes it easier for the user to align the first and second through holes when fixing the left and right flanges, thus shortening the fixing time of the fixing components.

[0018] Preferably, the tapered tube is a hollow cone, and the bottom end of the tapered tube is welded and fixed to the left end of the left flange and the right end of the right flange, respectively.

[0019] In this invention, the tapered tube on the left is placed into the left pipe to be fixed, and the contact point between the tapered tube and the left pipe is welded and fixed. The tapered tube on the right is placed into the right pipe to be fixed, and the contact point between the tapered tube and the right pipe is welded and fixed. Pipes of different radii are welded and fixed to the tapered tube, increasing the application scenarios of the flange assembly.

[0020] Preferably, the left flange has several first through holes distributed at equal intervals near its edge, and the first through holes have second through holes corresponding to the right flange. The bolt passes through the first through holes and the second through holes and is threadedly connected to the nut.

[0021] In this utility model, by setting a first perforation and a second perforation, it is convenient for the fixing assembly to fix the left flange and the right flange. The first perforation and the second perforation are distributed in a ring with equal spacing, which makes the force more uniform during fixing and avoids the right flange and the left flange from being misaligned due to different fixing forces, thus affecting the airtightness of the flange assembly connection.

[0022] Preferably, the bolt is fitted with two washers, the left washer is fitted to the left side of the left flange, and the right washer is fitted to the right side of the right flange, and the washers are slidably connected to the bolt.

[0023] In this invention, by setting a gasket, the contact area between the bolt head and the right flange and the bottom of the nut and the left flange is increased, thereby reducing the pressure on the contact surface and preventing excessive pressure from causing deformation of the flange assembly and affecting its service life.

[0024] Compared with the prior art, the beneficial effects of this utility model are:

[0025] 1. This utility model, by welding tapered pipes to the left end of the left flange and the right end of the right flange, allows pipes of different sizes to be welded to the outside of the flange assembly, increasing the application scenarios of the flange assembly. The left and right flanges are fixed in position by the insertion and cooperation of the alignment block and the alignment groove, avoiding the need to constantly adjust the position of the first and second perforations when using fixing components, thus reducing the fixing time. At the same time, the airtightness of the flange assembly is increased by providing a sealing ring between the protrusion and the groove. In addition, the top of the protrusion is also provided with teeth to increase the contact area between the protrusion and the sealing ring, further increasing the airtightness of the flange assembly.

[0026] 2. In this utility model, the first and second perforations are distributed in an annular pattern at equal intervals, which makes the pressure of the fixing component on the flange component more uniform. This avoids uneven pressure causing the contact surfaces of the right and left flanges to be non-horizontal, thus affecting the internal airtightness of the flange component. By placing gaskets at the contact points between the bolt head and the right flange, and at the contact points between the nut and the left flange, the contact area between the fixing component and the flange component is increased, reducing pressure and preventing damage to the flange component due to excessive pressure, which would affect the service life of the flange component. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall assembly structure of this utility model;

[0028] Figure 2 This is an exploded view of the left side structure of this utility model;

[0029] Figure 3 This is an exploded view of the right side structure of this utility model;

[0030] Figure 4 This is a schematic diagram of the left flange structure of this utility model;

[0031] Figure 5 This is a schematic diagram of the right flange structure of this utility model;

[0032] Figure 6 This is a cross-sectional structural diagram of the present invention in its overall separated state.

[0033] The meanings of the labels in the diagram are as follows:

[0034] 1. Flange assembly; 10. Left flange; 100. Groove; 11. Right flange; 110. Protrusion; 12. Sealing ring; 13. First perforation; 14. Alignment block; 15. Alignment groove; 16. Second perforation;

[0035] 2. Fixing components; 20. Bolts; 21. Nuts; 22. Washers;

[0036] 3. Tapered tube. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] Please see Figures 1-6 This embodiment provides a technical solution:

[0039] A pipe connection flange includes a flange assembly 1 and a fixing assembly 2 disposed above the flange assembly 1. The flange assembly 1 includes a left flange 10 and a right flange 11 corresponding to the left flange 10. The width of the outer wall of the left flange 10 and the right flange 11 is the same.

[0040] In this utility model, by setting a left flange 10 and a right flange 11 with the same width on the outer wall, the overall appearance is more beautiful, and the connection between the left flange 10 and the right flange 11 is tighter.

[0041] Furthermore, the left flange 10 has a groove 100 on the right side and the right flange 11 has a protrusion 110 on the left side. The protrusion 110 and the right flange 11 are integrally formed, and the width of the inner wall of the groove 100 is matched with the width of the outer wall of the protrusion 110. The groove 100 and the protrusion 110 are inserted into each other.

[0042] In this utility model, the protrusion 110 and the right flange 11 are integrally formed, which makes the connection between the protrusion 110 and the right flange 11 more secure. At the same time, the width of the inner wall of the groove 100 is matched with the width of the outer wall of the protrusion 110, and the insertion fit between the groove 100 and the protrusion 110 increases the airtightness of the connection between the left flange 10 and the right flange 11.

[0043] It should be noted that the top of the protrusion 110 has evenly spaced teeth.

[0044] In this invention, by providing serrations at the top of the protrusion 110, the contact area between the protrusion 110 and the sealing ring 12 is increased, thereby enhancing the airtightness between the protrusion 110 and the groove 100.

[0045] Specifically, a sealing ring 12 is provided between the groove 100 and the protrusion 110. The sealing ring 12 is made of polytetrafluoroethylene material. The outer surface of the sealing ring 12 is tightly fitted with the inner wall of the groove 100. The thickness of the sealing ring 12 is less than the depth of the groove 100.

[0046] In this invention, the sealing ring 12 is made of polytetrafluoroethylene, which has high strength deformation and corrosion resistance. It can continue to work in strong acid and alkali environments, increasing the service life of the flange assembly 1. At the same time, the sealing ring 12 fits tightly with the groove 100, further increasing the airtightness between the groove 100 and the protrusion 110. The thickness of the sealing ring 12 is less than the depth of the groove 100, avoiding the sealing ring 12 being too thick, which would affect the insertion effect between the groove 100 and the protrusion 110.

[0047] In addition, an alignment groove 15 is provided at the upper end of the left flange 10, and an alignment block 14 is provided on the right flange 11 at the position corresponding to the alignment groove 15. The alignment groove 15 and the alignment block 14 are inserted and fitted together, and the inner wall of the alignment groove 15 is tightly fitted to the outer surface of the alignment block 14.

[0048] In this utility model, the alignment groove 15 and the alignment block 14 are inserted and engaged, which makes it convenient for the user to align the first through hole 13 and the second through hole 16 when fixing the left flange 10 and the right flange 11, thus shortening the fixing time of the fixing component 2.

[0049] In particular, tapered tubes 3 are provided at the left end of the left flange 10 and the right end of the right flange 11. The tapered tubes 3 are hollow cones, and the bottom ends of the tapered tubes 3 are welded and fixed to the left end of the left flange 10 and the right end of the right flange 11, respectively.

[0050] In this utility model, by placing the left tapered tube 3 into the left pipe to be fixed, welding and fixing the tapered tube 3 at the contact point with the left pipe, and placing the right tapered tube 3 into the right pipe to be fixed, welding and fixing the tapered tube 3 at the contact point with the right pipe, pipes of different radii are welded and fixed to the tapered tube 3, thus increasing the application scenarios of the flange assembly 1.

[0051] It should be noted that near the edge of the left flange 10, there are several first through holes 13 that are evenly spaced. The first through holes 13 and the corresponding second through holes 16 on the right flange 11 are provided. The bolt 20 passes through the first through holes 13 and the second through holes 16 and is threadedly connected to the nut 21.

[0052] In this utility model, by providing a first through hole 13 and a second through hole 16, it is convenient for the fixing assembly 2 to fix the left flange 10 and the right flange 11. The first through hole 13 and the second through hole 16 are distributed in a ring with equal spacing, which makes the force more uniform during fixing and avoids the right flange 11 and the left flange 10 from being misaligned due to different fixing forces, thus affecting the airtightness of the flange assembly 1 connection.

[0053] Finally, it should be noted that the fixing component 2 includes a bolt 20 and a nut 21 on the bolt 20. Two washers 22 are fitted on the bolt 20. The left washer 22 fits against the left side of the left flange 10, and the right washer 22 fits against the right side of the right flange 11. The washer 22 is slidably connected to the bolt 20.

[0054] In this utility model, by setting a gasket 22, the contact area between the head of the bolt 20 and the right flange 11 and the bottom of the nut 21 and the left flange 10 is increased, thereby reducing the pressure on the contact surface and preventing excessive pressure from deforming the flange assembly 1 and affecting the service life of the flange assembly 1.

[0055] In this embodiment, when using a pipe connection flange, the user first welds two tapered pipes 3 to the left end of the left flange 10 and the right end of the right flange 11, respectively. The sealing ring 12 is placed inside the groove 100, and the alignment block 14 is inserted into the alignment groove 15. At this time, the positions of the first through hole 13 and the second through hole 16 are fixed. The groove 100 is inserted into the protrusion 110. Then, the bolt 20 is passed through the gasket 22 at the right end, the second through hole 16, the first through hole 13, and the gasket 22 at the left end in sequence. The bolt 20 is then threaded into the nut 21 to fix the flange assembly 1.

[0056] When a pipe connection flange is required, first insert the left tapered pipe 3 into the left pipe to be fixed, and weld the tapered pipe 3 to the left pipe at the contact point. Then insert the right tapered pipe 3 into the right pipe to be fixed, and weld the tapered pipe 3 to the right pipe at the contact point. Insert the alignment block 14 into the alignment groove 15, and thread the bolt 20 through hole 13, the second through hole 16, the gasket 22 and the nut 21. After threading all the bolts 20 and nuts 21, tighten the nuts 21 diagonally to avoid the pressure at one end of the fixing component 2 being greater than that at the other ends, which would cause the left flange 10 and the right flange 11 to be connected at an angle, affecting the internal airtightness of the flange component 1.

[0057] When the pipe becomes blocked or needs to be replaced, unscrew the nut 21 of the fixing component 2, pull the bolt 20 out of the first through hole 13, the second through hole 16, and the gasket 22, and pull the alignment groove 15 out of the alignment block 14. At this time, the left flange 10 and the right flange 11 are separated. Clean the inside of the pipe or replace the pipes at both ends of the flange component 1. Insert the alignment block 14 and the alignment groove 15 into the pipe. Thread the bolt 20 through the first through hole 13, the second through hole 16, the gasket 22 and the nut 21. Tighten the nut 21 diagonally.

Claims

1. A pipe connection flange, comprising a flange assembly (1) and a fixing assembly (2) disposed above the flange assembly (1), characterized in that: The flange assembly (1) includes a left flange (10) and a right flange (11) corresponding to the left flange (10). The right side of the left flange (10) is provided with a groove (100), and the left side of the right flange (11) is provided with a protrusion (110). A sealing ring (12) is provided between the groove (100) and the protrusion (110). The upper end of the left flange (10) is provided with an alignment groove (15), and the right flange (11) is provided with an alignment block (14) corresponding to the alignment groove (15). The left end of the left flange (10) and the right end of the right flange (11) are both provided with tapered tubes (3). The fixing assembly (2) includes a bolt (20) and a nut (21) on the bolt (20).

2. The pipe connection flange according to claim 1, characterized in that: The width of the outer wall of the left flange (10) is the same as that of the right flange (11).

3. The pipe connection flange according to claim 1, characterized in that: The protrusion (110) and the right flange (11) are integrally formed, and the width of the inner wall of the groove (100) is adapted to the width of the outer wall of the protrusion (110). The groove (100) and the protrusion (110) are inserted into each other.

4. The pipe connection flange according to claim 1, characterized in that: The top of the protrusion (110) is provided with equally spaced teeth.

5. The pipe connection flange according to claim 1, characterized in that: The sealing ring (12) is made of polytetrafluoroethylene material. The outer surface of the sealing ring (12) is in close contact with the inner wall of the groove (100). The thickness of the sealing ring (12) is less than the depth of the groove (100).

6. The pipe connection flange according to claim 1, characterized in that: The alignment groove (15) is inserted into the alignment block (14), and the inner wall of the alignment groove (15) is in close contact with the outer surface of the alignment block (14).

7. The pipe connection flange according to claim 1, characterized in that: The tapered tube (3) is a hollow cone, and the bottom end of the tapered tube (3) is welded and fixed to the left end of the left flange (10) and the right end of the right flange (11).

8. The pipe connection flange according to claim 1, characterized in that: Near the edge of the left flange (10), there are several first through holes (13) distributed at equal intervals. The first through holes (13) and the second through holes (16) are provided at the corresponding positions of the right flange (11). The bolt (20) passes through the first through holes (13) and the second through holes (16) and is threadedly connected to the nut (21).

9. The pipe connection flange according to claim 1, characterized in that: Two gaskets (22) are fitted on the bolt (20). The left gasket (22) is in contact with the left side of the left flange (10), and the right gasket (22) is in contact with the right side of the right flange (11). The gasket (22) is slidably connected to the bolt (20).

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