Large-diameter fluid pipe with energy dissipation and vibration and noise reduction functions

Abstract

This utility model discloses a large-diameter fluid pipeline with energy dissipation, vibration reduction, and noise reduction functions. It includes a first pipeline with a flange a fixedly connected to its outlet end, and a second pipeline with a flange b fixedly connected to its inlet end. An orifice plate is provided between flange a and flange b. Both the first and second pipelines share a bypass adjustment unit, and the second pipeline has a noise reduction unit. This utility model's large-diameter fluid pipeline with energy dissipation, vibration reduction, and noise reduction functions solves the problems of high vibration noise and low energy dissipation efficiency associated with orifice plates in traditional pipelines.

Description

Technical Field

[0001] This utility model belongs to the field of fluid transport equipment technology, specifically relating to large-diameter fluid pipelines with energy dissipation, vibration reduction and noise reduction functions. Background Technology

[0002] In large-diameter fluid transport systems, energy dissipation orifice plates are commonly used components for regulating fluid pressure and dissipating excess energy. Traditional single-stage energy dissipation orifice plates typically employ a single-hole or symmetrical multi-hole structure. When high-speed fluids such as slurries or high-pressure liquids pass through, sudden changes in the flow path can easily generate severe turbulence, leading to pipe vibration and high-frequency noise. Existing technologies have the following problems: First, significant vibration and noise. Single-hole structures result in concentrated fluid impact, while symmetrical multi-hole layouts are prone to resonance. Measured vibration amplitudes can reach over 50 mm / s, and noise levels exceed 90 dB, threatening the sealing of pipe welds and flange connections. Long-term operation may lead to equipment fatigue damage. Second, the energy dissipation efficiency is singular, relying solely on orifice diameter reduction for energy dissipation without considering flow optimization. Under high pressure differential conditions, cavitation is prone to occur, exacerbating orifice plate wear. Third, poor installation adaptability. Fixed-specification orifice plates cannot adapt to different pipe diameters and flow rates, and lack vibration damping design, allowing vibration to be easily transmitted to critical equipment such as valves and instruments. Utility Model Content

[0003] The purpose of this invention is to provide a large-diameter fluid pipeline with energy dissipation, vibration reduction, and noise reduction functions, which solves the problems of high vibration noise and low energy dissipation efficiency of orifice plates in traditional pipelines.

[0004] The technical solution adopted by this utility model is a large-diameter fluid pipeline with energy dissipation, vibration reduction and noise reduction functions, including a first pipeline, a flange a fixedly connected to the outlet end of the first pipeline, and a second pipeline, a flange b fixedly connected to the inlet end of the second pipeline, an orifice plate provided between flange a and flange b, a bypass adjustment unit provided on the first pipeline and the second pipeline, and a noise reduction unit provided on the second pipeline.

[0005] The features of this utility model also include:

[0006] Both flange a and flange b have several flange bolt holes. Flange a and flange b are fixed together by flange bolts in the flange bolt holes. Elastic damping sleeves are provided on the outer walls of flange a and flange b at the flange bolt holes. The elastic damping sleeves are fitted on the outer walls of the flange bolts and are interference-fitted with the flange bolts.

[0007] Composite vibration damping pads are installed between the orifice plate and flanges a and b.

[0008] The composite vibration damping pad consists of an inner layer of nitrile rubber, which is wrapped with an outer layer of stainless steel mesh.

[0009] The orifice plate has a cylindrical structure. The orifice plate has a main energy dissipation hole, a first-stage energy dissipation hole at the top of the main energy dissipation hole, and a second-stage energy dissipation hole at the bottom of the main energy dissipation hole.

[0010] The diameter D1 of the main energy dissipation hole is larger than the diameter D2 of the first-stage energy dissipation hole, and the diameter D2 of the first-stage energy dissipation hole is larger than the diameter D3 of the second-stage energy dissipation hole.

[0011] The inlet end of the main energy dissipation hole is provided with a main horn-shaped guide bevel, the bevel angle of which is 45°~75°. The outlet end of the second pipe is set as a straight section, the length of which is greater than 10 times the diameter D of the second pipe. The inlet end of the first-stage energy dissipation hole is provided with a first horn-shaped guide bevel, the bevel angle of which is 45°~75°. The inlet end of the second-stage energy dissipation hole is provided with a second horn-shaped guide bevel, the bevel angle of which is 45°~75°.

[0012] The bypass regulating unit includes a bypass pipe, one end of which is connected to the first pipe and the other end of which is connected to the second pipe. A bypass regulating valve is installed on the bypass pipe.

[0013] The silencing unit includes a flow guide pipe, one end of which is connected to the second pipe and is located at the top of the second pipe. The other end of the flow guide pipe is threaded with a silencer. The distance between the connection point of the flow guide pipe and the second pipe and the flange b is no more than 30cm.

[0014] The muffler diameter is 5 times the diameter of the guide pipe, the muffler length is 3 times the muffler diameter, the muffler cross-section is a "U" shaped structure, the muffler includes an aluminum alloy corrugated plate shell, the aluminum alloy corrugated plate shell is filled with a porous cylindrical core layer, and the aluminum alloy corrugated plate shell is filled with a glass wool layer in the curved section of the "U" shaped structure.

[0015] The beneficial effects of this utility model are:

[0016] This utility model provides a large-diameter fluid pipeline with energy dissipation, vibration reduction, and noise reduction functions. The main energy dissipation hole, together with the first-stage energy dissipation hole and the second-stage energy dissipation hole, forms a flow guiding structure that disperses the fluid impact energy into multi-stage dissipation. Compared with the traditional single-hole structure, this energy dissipation reduces the vibration excitation source from the source. The flexible flanges a and b block vibration transmission, and the damping silencer absorbs high-frequency noise. The measured vibration amplitude can be reduced to below 10 mm / s, and the noise level is below 75 dB, meeting the occupational health standards for industrial sites. The adjustable orifice structure adapts to different flow rates, and the adjustable range can reach ±15% of the design flow rate. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the structure of a large-diameter fluid pipeline with energy dissipation, vibration reduction, and noise reduction functions according to this utility model.

[0018] Figure 2 This is a schematic diagram of the composite vibration damping pad for a large-diameter fluid pipeline with energy dissipation, vibration reduction, and noise reduction functions according to this utility model.

[0019] Figure 3 This is a schematic diagram of the structure of the orifice plate of the large-diameter fluid pipeline with energy dissipation, vibration reduction and noise reduction functions of this utility model.

[0020] Figure 4 yes Figure 3 Side view;

[0021] Figure 5 yes Figure 4 A magnified view of part A in the image;

[0022] Figure 6 This is a schematic diagram of the structure of the silencer for a large-diameter fluid pipeline with energy dissipation, vibration reduction, and noise reduction functions according to this utility model.

[0023] In the figure, 1. First pipe, 2. Flange a, 3. Second pipe, 4. Flange b, 5. Orifice plate, 6. Flange bolt hole, 7. Flange bolt, 8. Elastic damping sleeve, 9. Composite vibration damping pad, 10. Nitrile rubber inner layer, 11. Stainless steel mesh outer layer, 12. Main energy dissipation hole, 13. First stage energy dissipation hole, 14. Second stage energy dissipation hole, 15. Main horn-shaped guide bevel (15), 16. First horn-shaped guide bevel, 17. Second horn-shaped guide bevel, 18. Bypass pipe, 19. Bypass regulating valve, 20. Guide pipe, 21. Silencer, 22. Aluminum alloy corrugated plate shell, 23. Porous core layer, 24. Glass wool layer. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0025] The large-diameter fluid pipeline with energy dissipation, vibration reduction, and noise reduction functions provided by this utility model, such as... Figure 1As shown, the system includes a first pipe 1, with a flange a2 fixedly connected to its outlet end, and a second pipe 3, with a flange b4 fixedly connected to its inlet end. An orifice plate 5 is provided between flange a2 and flange b4. The orifice plate 5 is made of Q345B high-strength steel with a thickness of 10-20mm. Both the first pipe 1 and the second pipe 3 have a bypass adjustment unit, and the second pipe 3 has a noise reduction unit. Both flange a2 and flange b4 have several flange bolt holes 6, and are fixedly connected to each other using flange bolts 7 within these holes. Elastic damping sleeves 8 are provided on the outer walls of both flange a2 and flange b4 at the bolt holes 6. The elastic damping sleeves 8 are fitted onto the outer walls of the flange bolts 7 with an interference fit. Composite vibration damping pads 9 are provided between the orifice plate 5 and flanges a2 and b4. Figure 2 As shown, the composite vibration damping pad 9 includes a nitrile rubber inner layer 10, and a stainless steel mesh outer layer 11 wrapped around the nitrile rubber inner layer 10. (As...) Figure 3 As shown, the orifice plate 5 has a cylindrical structure. A main energy dissipation hole 12 is formed on the orifice plate 5. A primary energy dissipation hole 13 is also formed at the top of the main energy dissipation hole 12, and a secondary energy dissipation hole 14 is also formed at the bottom of the main energy dissipation hole 12. Figure 4 As shown, the diameter D1 of the main energy dissipation hole 12 is larger than the diameter D2 of the first-stage energy dissipation hole 13, and the diameter D2 of the first-stage energy dissipation hole 13 is larger than the diameter D3 of the second-stage energy dissipation hole 14. Figure 5 As shown, the inlet end of the main energy dissipation orifice 12 is provided with a main trumpet-shaped guide bevel 15, the bevel angle of the main trumpet-shaped guide bevel 15 is 45°~75°, and the second pipe 3 is set as a straight section at the outlet end of the main energy dissipation orifice 12, the length of the straight section of the second pipe 3 is greater than 10. The diameter D of the second pipe 3 is twice that of the first stage energy dissipation hole 13; the inlet end of the first stage energy dissipation hole 13 is provided with a first horn-shaped guide bevel 16, the bevel angle of the first horn-shaped guide bevel 16 is 45°~75°; the inlet end of the second stage energy dissipation hole 14 is provided with a second horn-shaped guide bevel 17, the bevel angle of the second horn-shaped guide bevel 17 is 45°~75°; the bypass regulating unit includes a bypass pipe 18, one end of the bypass pipe 18 is connected to the first pipe 1, the other end of the bypass pipe 18 is connected to the second pipe 3, and a bypass regulating valve 19 is installed on the bypass pipe 18; the silencing unit includes a guide pipe 20, one end of the guide pipe 20 is connected to the second pipe 3, the guide pipe 20 is located at the top of the second pipe 3, and the other end of the guide pipe 20 is threadedly connected to a silencer 21, the length of the connection between the guide pipe 20 and the second pipe 3 from the flange b4 is not greater than 30cm. Figure 6As shown, the diameter of the silencer 21 is 5 times the diameter of the guide pipe 20, and the length of the silencer 21 is 3 times the diameter of the silencer 21. The silencer 21 has a "U" shaped cross-section and includes an aluminum alloy corrugated plate shell 22. The aluminum alloy corrugated plate shell 22 is filled with a porous cylindrical core layer 23, and the curved section of the aluminum alloy corrugated plate shell 22 is filled with a glass wool layer 24, effectively forming an air damping layer. It is suitable for water pipes with a diameter ≥300mm or slurry pipes with a solid content of less than 10%, and is especially suitable for flow velocity control conditions such as the inlet of water storage tanks in the slurry transportation industry. It can replace the traditional single-stage orifice plate and achieve integrated control of energy dissipation, vibration reduction, and noise reduction.

[0026] The working principle of the large-diameter fluid pipeline with energy dissipation, vibration reduction, and noise reduction functions provided by this utility model is as follows: by setting the main energy dissipation hole 12, the vibration noise caused by the potential energy of the liquid in the first pipeline 1 and the second pipeline 3 is eliminated. At the same time, the first-stage energy dissipation hole 13 allows the air in the first pipeline 1 and the second pipeline 3 to be connected and have the same pressure, which also plays a role in energy dissipation, vibration reduction, and noise reduction. The second-stage energy dissipation hole 14 allows the sediment in the first pipeline 1 to be transported to the second pipeline 3, reducing blockage and further playing a role in energy dissipation, vibration reduction, and noise reduction. By setting the guide pipe 20 and the silencer 21, the high-frequency noise generated in the second pipeline 3 is absorbed and further eliminated.

[0027] Example 1

[0028] The large-diameter fluid pipeline with energy dissipation, vibration reduction, and noise reduction functions proposed in this embodiment, such as... Figure 1 As shown, it includes a first pipe 1, with a flange a2 fixedly connected to the outlet end of the first pipe 1, and a second pipe 3, with a flange b4 fixedly connected to the inlet end of the second pipe 3. An orifice plate 5 is provided between the flange a2 and the flange b4. A bypass adjustment unit is provided on both the first pipe 1 and the second pipe 3, and a silencer unit is provided on the second pipe 3.

[0029] Example 2

[0030] The large-diameter fluid pipeline with energy dissipation, vibration reduction, and noise reduction functions proposed in this embodiment, such as... Figure 1 As shown, the system includes a first pipe 1, with a flange a2 fixedly connected to the outlet end of the first pipe 1, and a second pipe 3, with a flange b4 fixedly connected to the inlet end of the second pipe 3. An orifice plate 5 is provided between flange a2 and flange b4. A bypass adjustment unit is provided on both the first pipe 1 and the second pipe 3, and a silencer unit is provided on the second pipe 3. Several flange bolt holes 6 are provided on both flange a2 and flange b4. Flange a2 and flange b4 are fixedly connected in the several flange bolt holes 6 by flange bolts 7. An elastic damping sleeve 8 is provided on the outer wall of flange a2 and flange b4 at the several flange bolt holes 6. The elastic damping sleeve 8 is fitted on the outer wall of the flange bolt 7, and the elastic damping sleeve 8 and the flange bolt 7 are interference fit.

[0031] Example 3

[0032] The large-diameter fluid pipeline with energy dissipation, vibration reduction, and noise reduction functions proposed in this embodiment, such as... Figure 1 As shown, the system includes a first pipe 1, with a flange a2 fixedly connected to its outlet end, and a second pipe 3, with a flange b4 fixedly connected to its inlet end. An orifice plate 5 is provided between flange a2 and flange b4. A bypass regulating unit is provided on both the first pipe 1 and the second pipe 3, and a noise reduction unit is provided on the second pipe 3. Both flange a2 and flange b4 have several flange bolt holes 6, and are fixedly connected to each other via flange bolts 7 within these holes. Elastic damping sleeves 8 are provided on the outer walls of both flange a2 and flange b4 at the bolt holes 6, and are fitted onto the outer walls of the flange bolts 7 with an interference fit. Composite vibration damping pads 9 are provided between the orifice plate 5 and flanges a2 and b4. Figure 2 As shown, the composite vibration damping pad 9 includes a nitrile rubber inner layer 10, and a stainless steel mesh outer layer 11 wrapped around the nitrile rubber inner layer 10.

[0033] Example 4

[0034] The large-diameter fluid pipeline with energy dissipation, vibration reduction, and noise reduction functions proposed in this embodiment, such as... Figure 1 As shown, the system includes a first pipe 1, with a flange a2 fixedly connected to its outlet end, and a second pipe 3, with a flange b4 fixedly connected to its inlet end. An orifice plate 5 is provided between flange a2 and flange b4. A bypass regulating unit is provided on both the first pipe 1 and the second pipe 3, and a noise reduction unit is provided on the second pipe 3. Both flange a2 and flange b4 have several flange bolt holes 6, and are fixedly connected to each other via flange bolts 7 within these holes. Elastic damping sleeves 8 are provided on the outer walls of both flange a2 and flange b4 at the bolt holes 6, and are fitted onto the outer walls of the flange bolts 7 with an interference fit. Composite vibration damping pads 9 are provided between the orifice plate 5 and flanges a2 and b4. Figure 2 As shown, the composite vibration damping pad 9 includes a nitrile rubber inner layer 10, and a stainless steel mesh outer layer 11 wrapped around the nitrile rubber inner layer 10. (As...) Figure 3 As shown, the orifice plate 5 has a cylindrical structure. A main energy dissipation hole 12 is formed on the orifice plate 5. A primary energy dissipation hole 13 is also formed at the top of the main energy dissipation hole 12, and a secondary energy dissipation hole 14 is also formed at the bottom of the main energy dissipation hole 12. Figure 4 As shown, the diameter D1 of the main energy dissipation hole 12 is larger than the diameter D2 of the first-stage energy dissipation hole 13, and the diameter D2 of the first-stage energy dissipation hole 13 is larger than the diameter D3 of the second-stage energy dissipation hole 14. Figure 5As shown, the inlet end of the main energy dissipation hole 12 is provided with a main horn-shaped guide bevel 15, the bevel angle of the main horn-shaped guide bevel 15 is 45°~75°, the outlet end of the second pipe 3 is set as a straight section, the length of the straight section of the second pipe 3 is greater than 10 times the diameter D of the second pipe 3; the inlet end of the first stage energy dissipation hole 13 is provided with a first horn-shaped guide bevel 16, the bevel angle of the first horn-shaped guide bevel 16 is 45°~75°; the inlet end of the second stage energy dissipation hole 14 is provided with a second horn-shaped guide bevel 17, the bevel angle of the second horn-shaped guide bevel 17 is 45°~75°.

[0035] Example 5

[0036] The large-diameter fluid pipeline with energy dissipation, vibration reduction, and noise reduction functions proposed in this embodiment, such as... Figure 1 As shown, the system includes a first pipe 1, with a flange a2 fixedly connected to its outlet end, and a second pipe 3, with a flange b4 fixedly connected to its inlet end. An orifice plate 5 is provided between flange a2 and flange b4. A bypass regulating unit is provided on both the first pipe 1 and the second pipe 3, and a noise reduction unit is provided on the second pipe 3. Both flange a2 and flange b4 have several flange bolt holes 6, and are fixedly connected to each other via flange bolts 7 within these holes. Elastic damping sleeves 8 are provided on the outer walls of both flange a2 and flange b4 at the bolt holes 6, and are fitted onto the outer walls of the flange bolts 7 with an interference fit. Composite vibration damping pads 9 are provided between the orifice plate 5 and flanges a2 and b4. Figure 2 As shown, the composite vibration damping pad 9 includes a nitrile rubber inner layer 10, and a stainless steel mesh outer layer 11 wrapped around the nitrile rubber inner layer 10. (As...) Figure 3 As shown, the orifice plate 5 has a cylindrical structure. A main energy dissipation hole 12 is formed on the orifice plate 5. A primary energy dissipation hole 13 is also formed at the top of the main energy dissipation hole 12, and a secondary energy dissipation hole 14 is also formed at the bottom of the main energy dissipation hole 12. Figure 4 As shown, the diameter D1 of the main energy dissipation hole 12 is larger than the diameter D2 of the first-stage energy dissipation hole 13, and the diameter D2 of the first-stage energy dissipation hole 13 is larger than the diameter D3 of the second-stage energy dissipation hole 14. Figure 5As shown, the inlet end of the main energy dissipation orifice 12 is provided with a main trumpet-shaped guide bevel 15, the bevel angle of the main trumpet-shaped guide bevel 15 is 45°~75°, and the second pipe 3 is set as a straight section at the outlet end of the main energy dissipation orifice 12, the length of the straight section of the second pipe 3 is greater than 10. The diameter D of the second pipe 3 is twice that of the first stage energy dissipation hole 13; the inlet end of the first stage energy dissipation hole 13 is provided with a first horn-shaped guide bevel 16, the bevel angle of the first horn-shaped guide bevel 16 is 45°~75°; the inlet end of the second stage energy dissipation hole 14 is provided with a second horn-shaped guide bevel 17, the bevel angle of the second horn-shaped guide bevel 17 is 45°~75°; the bypass regulating unit includes a bypass pipe 18, one end of the bypass pipe 18 is connected to the first pipe 1, the other end of the bypass pipe 18 is connected to the second pipe 3, and a bypass regulating valve 19 is installed on the bypass pipe 18; the silencing unit includes a guide pipe 20, one end of the guide pipe 20 is connected to the second pipe 3, the guide pipe 20 is located at the top of the second pipe 3, and the other end of the guide pipe 20 is threadedly connected to a silencer 21, the length of the connection between the guide pipe 20 and the second pipe 3 from the flange b4 is not greater than 30cm.

[0037] Example 6

[0038] The large-diameter fluid pipeline with energy dissipation, vibration reduction, and noise reduction functions proposed in this embodiment, such as... Figure 1 As shown, the system includes a first pipe 1, with a flange a2 fixedly connected to its outlet end, and a second pipe 3, with a flange b4 fixedly connected to its inlet end. An orifice plate 5 is provided between flange a2 and flange b4. A bypass regulating unit is provided on both the first pipe 1 and the second pipe 3, and a noise reduction unit is provided on the second pipe 3. Both flange a2 and flange b4 have several flange bolt holes 6, and are fixedly connected to each other via flange bolts 7 within these holes. Elastic damping sleeves 8 are provided on the outer walls of both flange a2 and flange b4 at the bolt holes 6, and are fitted onto the outer walls of the flange bolts 7 with an interference fit. Composite vibration damping pads 9 are provided between the orifice plate 5 and flanges a2 and b4. Figure 2 As shown, the composite vibration damping pad 9 includes a nitrile rubber inner layer 10, and a stainless steel mesh outer layer 11 wrapped around the nitrile rubber inner layer 10. (As...) Figure 3 As shown, the orifice plate 5 has a cylindrical structure. A main energy dissipation hole 12 is formed on the orifice plate 5. A primary energy dissipation hole 13 is also formed at the top of the main energy dissipation hole 12, and a secondary energy dissipation hole 14 is also formed at the bottom of the main energy dissipation hole 12. Figure 4 As shown, the diameter D1 of the main energy dissipation hole 12 is larger than the diameter D2 of the first-stage energy dissipation hole 13, and the diameter D2 of the first-stage energy dissipation hole 13 is larger than the diameter D3 of the second-stage energy dissipation hole 14. Figure 5As shown, the inlet end of the main energy dissipation orifice 12 is provided with a main trumpet-shaped guide bevel 15, the bevel angle of the main trumpet-shaped guide bevel 15 is 45°~75°, and the second pipe 3 is set as a straight section at the outlet end of the main energy dissipation orifice 12, the length of the straight section of the second pipe 3 is greater than 10. The diameter D of the second pipe 3 is twice that of the first stage energy dissipation hole 13; the inlet end of the first stage energy dissipation hole 13 is provided with a first horn-shaped guide bevel 16, the bevel angle of the first horn-shaped guide bevel 16 is 45°~75°; the inlet end of the second stage energy dissipation hole 14 is provided with a second horn-shaped guide bevel 17, the bevel angle of the second horn-shaped guide bevel 17 is 45°~75°; the bypass regulating unit includes a bypass pipe 18, one end of the bypass pipe 18 is connected to the first pipe 1, the other end of the bypass pipe 18 is connected to the second pipe 3, and a bypass regulating valve 19 is installed on the bypass pipe 18; the silencing unit includes a guide pipe 20, one end of the guide pipe 20 is connected to the second pipe 3, the guide pipe 20 is located at the top of the second pipe 3, and the other end of the guide pipe 20 is threadedly connected to a silencer 21, the length of the connection between the guide pipe 20 and the second pipe 3 from the flange b4 is not greater than 30cm. Figure 6 As shown, the diameter of the muffler 21 is 5 times the diameter of the guide pipe 20, the length of the muffler 21 is 3 times the diameter of the muffler 21, the cross-section of the muffler 21 is U-shaped, the muffler 21 includes an aluminum alloy corrugated plate shell 22, the aluminum alloy corrugated plate shell 22 is filled with a porous cylindrical core layer 23, and the aluminum alloy corrugated plate shell 22 is filled with a glass wool layer 24 in the curved section of the U-shaped structure.

Claims

1. A large-diameter fluid pipeline with energy dissipation, vibration reduction, and noise reduction functions, characterized in that: It includes a first pipe (1), the outlet end of the first pipe (1) is fixedly connected to a flange a (2), and a second pipe (3), the inlet end of the second pipe (3) is fixedly connected to a flange b (4), an orifice plate (5) is provided between the flange a (2) and the flange b (4), a bypass adjustment unit is provided on the first pipe (1) and the second pipe (3), and a noise reduction unit is provided on the second pipe (3).

2. The large-diameter fluid pipeline with energy dissipation, vibration reduction, and noise reduction functions according to claim 1, characterized in that, Both flange a (2) and flange b (4) have several flange bolt holes (6). Both flange a (2) and flange b (4) are fixedly connected in the several flange bolt holes (6) by flange bolts (7). Both flange a (2) and flange b (4) have elastic damping sleeves (8) at the several flange bolt holes (6) on their outer walls. The elastic damping sleeves (8) are fitted on the outer walls of the flange bolts (7) and are interference-fitted with the flange bolts (7).

3. The large-diameter fluid pipeline with energy dissipation, vibration reduction, and noise reduction functions according to claim 2, characterized in that, Composite vibration damping pads (9) are provided between the orifice plate (5) and flange a (2) and flange b (4).

4. The large-diameter fluid pipeline with energy dissipation, vibration reduction, and noise reduction functions according to claim 3, characterized in that, The composite vibration damping pad (9) includes a nitrile rubber inner layer (10), and the nitrile rubber inner layer (10) is wrapped with a stainless steel mesh outer layer (11).

5. The large-diameter fluid pipeline with energy dissipation, vibration reduction, and noise reduction functions according to claim 4, characterized in that, The perforated plate (5) has a cylindrical structure. A main energy dissipation hole (12) is provided on the perforated plate (5). A first-stage energy dissipation hole (13) is also provided on the top of the main energy dissipation hole (12) on the perforated plate (5). A second-stage energy dissipation hole (14) is also provided on the perforated plate (5) at the bottom of the main energy dissipation hole (12).

6. The large-diameter fluid pipeline with energy dissipation, vibration reduction, and noise reduction functions according to claim 5, characterized in that, The diameter D1 of the main energy dissipation hole (12) is greater than the diameter D2 of the first-stage energy dissipation hole (13), and the diameter D2 of the first-stage energy dissipation hole (13) is greater than the diameter D3 of the second-stage energy dissipation hole (14).

7. The large-diameter fluid pipeline with energy dissipation, vibration reduction, and noise reduction functions according to claim 6, characterized in that, The inlet end of the main energy dissipation hole (12) is provided with a main horn-shaped guide bevel (15), the bevel angle of the main horn-shaped guide bevel (15) is 45°~75°, the second pipe (3) is set as a straight section at the outlet end of the main energy dissipation hole (12), and the length of the straight section of the second pipe (3) is greater than 10 times the diameter D of the second pipe (3); the inlet end of the first stage energy dissipation hole (13) is provided with a first horn-shaped guide bevel (16), the bevel angle of the first horn-shaped guide bevel (16) is 45°~75°; the inlet end of the second stage energy dissipation hole (14) is provided with a second horn-shaped guide bevel (17), the bevel angle of the second horn-shaped guide bevel (17) is 45°~75°.

8. The large-diameter fluid pipeline with energy dissipation, vibration reduction, and noise reduction functions according to claim 7, characterized in that, The bypass regulating unit includes a bypass pipe (18), one end of which is connected to the first pipe (1), and the other end of which is connected to the second pipe (3). A bypass regulating valve (19) is installed on the bypass pipe (18).

9. The large-diameter fluid pipeline with energy dissipation, vibration reduction, and noise reduction functions according to claim 8, characterized in that, The silencing unit includes a flow guide pipe (20), one end of which is connected to the second pipe (3), the flow guide pipe (20) is located at the top of the second pipe (3), and the other end of the flow guide pipe (20) is threaded with a silencer (21). The distance between the connection point of the flow guide pipe (20) and the second pipe (3) and the flange b (4) is no more than 30cm.

10. The large-diameter fluid pipeline with energy dissipation, vibration reduction, and noise reduction functions according to claim 9, characterized in that, The diameter of the muffler (21) is 5 times the diameter of the guide pipe (20), the length of the muffler (21) is 3 times the diameter of the muffler (21), the cross-section of the muffler (21) is a "U" shaped structure, the muffler (21) includes an aluminum alloy corrugated plate shell (22), the aluminum alloy corrugated plate shell (22) is filled with a porous cylindrical core layer (23), and the aluminum alloy corrugated plate shell (22) is filled with a glass wool layer (24) in the curved section of the "U" shaped structure.

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