A marine seawater pipeline noise reduction assembly and seawater cooling device

Abstract

The utility model provides a kind of marine seawater pipeline noise reduction assembly and seawater cooling device.The noise reduction assembly includes shell and muffler pipe, shell defines first muffling cavity, and shell is provided with opening, and opening is communicated with first muffling cavity.Muffler pipe includes pipe wall and pipe bottom connected with pipe wall, muffler pipe is inserted into first muffling cavity by opening, pipe bottom is in first muffling cavity, and there is interval between pipe wall and shell.Water flow enters from the inlet of muffler pipe.Throttle hole is provided on pipe wall.The noise reduction assembly and seawater cooling device provided by the utility model can solve the problem of noise caused by cavitation and turbulent flow, and reduce the noise caused by cavitation and turbulent flow.

Description

Technical Field

[0001] This utility model relates to the field of marine seawater system technology, and in particular to a marine seawater pipeline noise reduction component and a seawater cooling device. Background Technology

[0002] Marine seawater cooling systems typically include pumps, piping, and valves, with seawater being pumped through the pumps. During operation, the pump inlet pressure is lower than the outlet pressure. When the pump inlet pressure is lower than the saturated vapor pressure, cavitation may occur, where gases in the seawater are released to form bubbles. These bubbles, when reaching high pressure, shrink in size and burst, leading to increased noise and vibration. Furthermore, when seawater flows out of the pump at high velocities, turbulence can easily occur, also generating noise. Utility Model Content

[0003] In view of the above problems, this utility model is proposed to provide a marine seawater pipeline noise reduction component and seawater cooling device that overcomes or at least partially solves the above problems.

[0004] One objective of this invention is to solve the noise problem caused by cavitation and turbulence, thereby reducing the noise caused by cavitation and turbulence.

[0005] Specifically, this utility model provides a marine seawater pipeline noise reduction component, comprising: A housing that defines a first silencing cavity, and an opening that communicates with the first silencing cavity; A silencer pipe, comprising a pipe wall and a pipe bottom connected to the pipe wall, wherein the silencer pipe is inserted into the first silencer cavity through the opening, the pipe bottom is located within the first silencer cavity, and there is a gap between the pipe wall and the shell; water flows in from the inlet of the silencer pipe; A throttling orifice is provided on the pipe wall.

[0006] Optionally, the housing is provided with a groove, and the groove opening faces away from the first silencing cavity; The noise reduction component also includes a housing, which covers the groove opening of the recess to define a second sound-absorbing cavity with the housing; The groove has sound-absorbing micropores on its bottom.

[0007] Optionally, the second silencing cavity is filled with silencing material.

[0008] Optionally, the sound-absorbing material is epoxy putty; The thickness of the epoxy putty is 30mm to 50mm.

[0009] Optionally, the housing includes: The inlet section includes a first inlet section and a second inlet section. The inner surface of the first inlet section is in contact with the outer surface of the pipe wall. The second inlet section is connected to the first inlet section, and the inner surface of the second inlet section gradually expands away from the first inlet section. A noise-absorbing section is connected to the second inlet section, and the noise-absorbing micropores are located on the noise-absorbing section.

[0010] Optionally, the throttling orifice is uniformly arranged around the pipe wall; along the diameter direction of the silencer pipe, the projection of the throttling orifice on the housing is located on the silencer section; The silencing section is a straight pipe; the ratio of the diameter of the throttling orifice to the distance between the pipe wall of the silencing pipe and the silencing section is 1:3 to 1:5.

[0011] Optionally, the housing further includes: The outlet section includes a first outlet section and a second outlet section, wherein the first outlet section is disposed between the silencing section and the second outlet section; The inner surface of the first outlet section tapers away from the silencing section; The second outlet section is provided with a first connecting part, the first connecting part including a first connecting plate, the first connecting plate being perpendicular to the second outlet section; the first connecting plate is provided with a threaded hole.

[0012] Optionally, the bottom of the pipe is curved, and there is a smooth transition between the bottom of the pipe and the pipe wall.

[0013] Optionally, a second connecting portion is provided at the inlet of the silencer pipe, and the second connecting portion is fitted onto the inlet end of the silencer pipe; the second connecting portion includes: The second connecting plate is perpendicular to the silencer pipe and has threaded holes. A third connecting plate is connected to the second connecting plate. The third connecting plate is located on the side of the second connecting plate away from the bottom of the pipe, and the end face of the third connecting plate away from the second connecting plate extends beyond the end face of the silencer pipe inlet. The third connecting plate includes a first connecting surface and a second connecting surface that are opposite each other, with the second connecting surface located outside the first connecting surface; the first connecting surface is flush with the inner surface of the silencer pipe; and the second connecting surface is gradually extended from the end face towards the second connecting plate.

[0014] This utility model also provides a seawater cooling device, comprising: Water pump, the water pump being used to transport seawater; valve; The noise reduction component as described in any of the above claims is detachably disposed between the water pump and the valve.

[0015] In this invention, a noise reduction component and a seawater cooling device are disclosed. The noise reduction component includes a shell and a silencer pipe. A first silencer cavity is formed inside the shell, and the silencer pipe is inserted into the first silencer cavity through an opening. The silencer pipe includes a pipe wall and a pipe bottom, with the pipe bottom located within the first silencer cavity. A throttling orifice is provided on the pipe wall. Water flows into the silencer pipe through an inlet and then into the first silencer cavity through the throttling orifice. When the water flows through the throttling orifice, the flow velocity increases and the pressure decreases. The water pressure is less likely to fall below the saturated vapor pressure, resulting in a relatively smaller number of bubbles and a smaller impact pressure when the bubbles burst, thereby reducing the noise generated by cavitation.

[0016] Furthermore, the water flows into the first silencing chamber through the throttling orifice. There is a gap between the shell and the pipe wall, meaning the cross-sectional area of ​​the pipe wall is smaller than that of the shell. After the water flows into the first silencing chamber from the silencing pipe, the water flow velocity decreases, and the water pressure gradually returns to normal levels, preventing air bubbles from suddenly bursting in the high-pressure area, thereby reducing noise generation. Moreover, the reduced water flow velocity decreases turbulence and eddies, making the water flow smoother and reducing noise.

[0017] Furthermore, the throttling orifice is set on the pipe wall, and the water flows along the pipe wall, reducing the noise generated by the collision between the water flow and the silencer pipe.

[0018] The above and other objects, advantages and features of this utility model will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0019] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings: Figure 1 This is a schematic structural diagram of a noise reduction component according to an embodiment of the present invention; Figure 2 yes Figure 1 A schematic cross-sectional view at point AA in the middle; Figure 3 yes Figure 2 A schematic diagram of the local structure at point B in the middle; Figure 4 This is a schematic structural diagram of the housing according to an embodiment of the present utility model; Figure 5This is a schematic structural diagram of a silencer tube according to an embodiment of the present utility model; Figure 6 This is a schematic structural diagram of a seawater cooling device according to an embodiment of the present invention; Figure 7 This is a schematic structural diagram of a seawater cooling device according to another embodiment of the present invention. Detailed Implementation

[0020] The following reference Figures 1 to 7 This invention describes a noise reduction component and a seawater cooling device according to embodiments of the present invention. In this description, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of the present invention, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically described, this indicates that other features are not excluded and may be further included.

[0021] Unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," and "couple" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] Furthermore, in the description of this embodiment, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. That is, in the description of this embodiment, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "below" of the second feature can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this embodiment, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0024] Figure 1 This is a schematic structural diagram of a noise reduction component according to an embodiment of the present invention, as shown below. Figure 1 As shown, and refer to Figures 2 to 7 This utility model provides a marine seawater pipeline noise reduction component 100, including a housing 10 and a silencer pipe 20. The housing 10 defines a first silencer cavity 140, and an opening 170 is provided on the housing 10, communicating with the first silencer cavity 140. The silencer pipe 20 includes a pipe wall 210 and a pipe bottom 220 connected to the pipe wall 210. The silencer pipe 20 is inserted into the first silencer cavity 140 through the opening 170, with the pipe bottom 220 located within the first silencer cavity 140, and a gap exists between the pipe wall 210 and the housing 10. Water flows in from the inlet 240 of the silencer pipe 20. A throttling orifice 230 is provided on the pipe wall 210.

[0025] In this embodiment, the noise reduction component 100 includes a housing 10 and a silencer pipe 20. A first silencer cavity 140 is formed inside the housing 10, and the silencer pipe 20 is inserted into the first silencer cavity 140 through an opening 170. The silencer pipe 20 includes a pipe wall 210 and a pipe bottom 220, with the pipe bottom 220 located within the first silencer cavity 140. A throttling orifice 230 is provided on the pipe wall 210. Water flows into the silencer pipe 20 through the inlet 240 and flows into the first silencer cavity 140 through the throttling orifice 230. When the water flows through the throttling orifice 230, the flow velocity increases and the pressure decreases. The pressure of the water flow is less likely to fall below the saturated vapor pressure, resulting in a relatively small number of bubbles generated. The impact pressure generated when the bubbles burst is also small, thereby reducing the noise generated by cavitation.

[0026] Furthermore, water flows into the first silencing chamber 140 through the throttling orifice 230. There is a gap between the shell 10 and the pipe wall 210, meaning the cross-sectional area of ​​the pipe wall 210 is smaller than that of the shell 10. After the water flows into the first silencing chamber 140 from the silencing pipe 20, the water flow velocity decreases, and the water pressure gradually returns to normal levels, preventing sudden bursting of air bubbles in the high-pressure area, thereby reducing noise generation. Moreover, the reduced water flow velocity decreases turbulence and eddies, making the water flow smoother and reducing noise.

[0027] Furthermore, the throttling orifice 230 is provided on the pipe wall 210, and the water flows along the pipe wall 210, reducing the noise generated by the collision between the water flow and the silencer pipe 20.

[0028] In some embodiments of this utility model, such as Figure 2 and Figure 4 As shown, the housing 10 has a groove, the opening of which faces away from the first silencing cavity 140. The noise reduction assembly 100 also includes an outer shell 30, which covers the opening of the groove to define a second silencing cavity 150 with the housing 10. Silencing micropores 160 are provided on the bottom of the groove.

[0029] In this embodiment, a second silencing cavity 150 is provided on the outer side of the housing 10. A groove is provided on the housing 10, and the second silencing cavity 150 is defined by the groove wall and the outer housing 30 located outside the groove. Silencing micropores 160 are provided at the bottom of the groove. When the noise generated by the water flow passes through the silencing micropores 160, the noise energy is converted into heat energy, thereby reducing the noise of the water flow. After the water flow enters the first silencing cavity 140, the generated noise enters the second silencing cavity 150 through the silencing micropores 160. When the sound wave of the water flow noise matches the natural frequency of the second silencing cavity 150, resonance occurs within the second silencing cavity 150, thereby reducing the noise of the water flow.

[0030] In some embodiments of this utility model, such as Figure 2 As shown, the second silencing cavity 150 is filled with silencing material 40.

[0031] In this embodiment, the second silencing cavity 150 is filled with silencing material 40. Noise generated by the water flow enters the second silencing cavity 150 through silencing micropores. Since the second silencing cavity 150 is filled with silencing material 40, when noise propagates to the silencing material 40, the silencing material 40 absorbs and disperses the noise, reducing noise reflection and propagation, thereby reducing noise.

[0032] In some embodiments of this invention, the sound-absorbing material 40 is epoxy putty. The thickness of the epoxy putty is 30mm to 50mm.

[0033] In this embodiment, the sound-absorbing material 40 is epoxy putty. Epoxy putty has good flexibility; when noise propagates to its surface, it deforms, converting the noise into heat energy, thus absorbing and reducing noise. Furthermore, epoxy putty also has good impact resistance, absorbing noise from water flow impacting the housing 10 and the mechanical vibration of the noise reduction component 100, thereby reducing noise generated by water flow impact and mechanical vibration.

[0034] Furthermore, the thickness of the epoxy mortar is 30mm to 50mm. For example, the thickness of the epoxy mortar is 30mm, 35mm, 40mm or 50mm.

[0035] In some other embodiments of this utility model, the sound-absorbing material 40 is glass wool.

[0036] In this embodiment, the glass wool has a porous structure and a rough surface. When noise propagates to the glass wool, the noise is continuously reflected, refracted and diffused in the pores inside the glass wool, causing the noise energy to gradually weaken, thereby achieving the effect of noise reduction.

[0037] In some embodiments of this utility model, such as Figure 2 As shown, the housing 10 includes an inlet section 110 and a silencing section 120. The inlet section 110 includes a first inlet section 111 and a second inlet section 112. The inner surface of the first inlet section 111 is in contact with the outer surface of the pipe wall 210. The second inlet section 112 is connected to the first inlet section 111, and the inner surface of the second inlet section 112 gradually expands away from the first inlet section 111. The silencing section 120 is connected to the second inlet section 112, and silencing micro-holes 160 are located on the silencing section 120.

[0038] In this embodiment, the housing 10 includes an inlet section 110 and a silencing section 120. The inlet section 110 includes a first inlet section 111 and a second inlet section 112, which are sequentially connected. The second inlet section 112 gradually expands in the direction from the first inlet section 111 to the silencing section 120. When the silencing tube 20 is inserted into the first silencing cavity 140, the first inlet section 111 contacts and fixes the silencing tube 20. Silencing micro-holes 160 are located on the silencing section 120. Water flows into the first silencing chamber 140 through the throttling orifice 230. The water flows along the shell 10. When the water flows to the second inlet section 112, since the second inlet section 112 is gradually expanding, the second inlet section 112 is not perpendicular to the silencing section 120. That is, the direction of the second inlet section 112 is not perpendicular to the direction of the water flow. This reduces the turbulence and impact force between the water flow and the second inlet section 112, thereby reducing the noise generated by the impact of the water flow and improving the noise reduction effect of the noise reduction component 100.

[0039] In some embodiments of this utility model, such as Figure 6 As shown, the throttling orifices 230 are uniformly arranged around the pipe wall 210. Along the diameter direction of the silencer pipe 20, the projection of the throttling orifices 230 on the housing 10 lies on the silencer section 120. The silencer section 120 is a straight pipe, and the ratio of the diameter of the throttling orifice 230 to the distance between the pipe wall 210 of the silencer pipe 20 and the silencer section 120 is 1:3 to 1:5.

[0040] In this embodiment, the throttling orifice 230 is uniformly disposed on the pipe wall 210, and the projection of the throttling orifice 230 along the diameter direction of the silencer pipe 20 is located on the silencer section 120. When the water flows into the first silencer chamber 140 from the throttling orifice 230, the speed of the water flow increases, avoiding the water flow directly impacting the second inlet section 112 due to the close distance between the throttling orifice 230 and the second inlet section 112, thereby reducing the generation of noise.

[0041] Furthermore, the ratio of the diameter of the throttling orifice 230 to the distance between the pipe wall 210 and the silencing section 120 of the silencer pipe 20 is 1:3 to 1:5. For example, the ratio of the diameter of the throttling orifice 230 to the distance between the pipe wall 210 and the silencing section 120 of the silencer pipe 20 is 1:3, 1:4, or 1:5. After the water flows through the throttling orifice 230, the flow velocity increases. If the distance between the pipe wall 210 and the silencing section 120 of the silencer pipe 20 is too small, the water flowing out of the throttling orifice 230 will directly impact the silencing section 120, causing noise. Therefore, a certain distance needs to be maintained between the pipe wall 210 and the silencing section 120 of the silencer pipe 20 to reduce the noise generated by the water flow impact.

[0042] Preferably, the ratio of the diameter of the throttling orifice 230 to the distance between the pipe wall 210 and the silencing section 120 of the silencer 20 is 1:4.

[0043] In some embodiments of this utility model, such as Figure 2 and Figure 4 As shown, the housing 10 also includes an outlet section 130, which includes a first outlet section 131 and a second outlet section 132. The first outlet section 131 is disposed between the silencing section 120 and the second outlet section 132. The inner surface of the first outlet section 131 tapers away from the silencing section 120. A first connecting portion 50 is provided on the second outlet section 132, which includes a first connecting plate 510 perpendicular to the second outlet section 132. A threaded hole 70 is provided on the first connecting plate 510.

[0044] In this embodiment, the water in the first silencing cavity 140 of the housing 10 flows along the wall of the silencing section 120 toward the outlet section 130. When the water flows to the first outlet section 131, the water flow is more stable when it flows along the wall of the first outlet section 131 to the second inlet section 112 due to the gradual narrowing of the first outlet section 131, which reduces turbulence and eddies, thereby reducing airflow noise.

[0045] Furthermore, a first connecting plate 510 is provided on the second outlet section 132. The first connecting plate 510 surrounds the second outlet section 132 and is perpendicular to the second outlet section 132. The first connecting plate 510 is provided with threaded holes 70 to connect the noise reduction component 100 and other components by screws. The connection method is simple and convenient, and the connection is firm and reliable.

[0046] In some embodiments of this utility model, such as Figure 2 As shown, the bottom of the tube 220 is a curved surface, and there is a smooth transition between the bottom of the tube 220 and the tube wall 210.

[0047] In this embodiment, water flows into the silencer pipe 20 from the inlet 240 and flows along the pipe wall 210. Part of the water flows through the throttling orifice 230 into the first silencer chamber 140, while the other part continues to flow along the pipe wall 210 to the bottom 220 and flows along the wall surface of the bottom 220. Since the bottom 220 is curved and there is a smooth transition between the bottom 220 and the pipe wall 210, the turbulence and impact force of the water flow are reduced, thereby reducing the noise generated by the impact of the water flow and improving the noise reduction effect of the noise reduction component 100.

[0048] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, a second connecting portion 60 is provided at the inlet 240 of the muffler pipe 20, and the second connecting portion 60 is fitted onto the inlet 240 end of the muffler pipe 20. The second connecting portion 60 includes a second connecting plate 610 and a third connecting plate 620. The second connecting plate 610 is perpendicular to the muffler pipe 20 and has a threaded hole 70. The third connecting plate 620 is connected to the second connecting plate 610 and is located on the side of the second connecting plate 610 away from the pipe bottom 220. The end face of the third connecting plate 620 away from the second connecting plate 610 extends beyond the end face of the muffler pipe 20 at the inlet 240. The third connecting plate 620 includes a first connecting surface 621 and a second connecting surface 622, with the second connecting surface 622 located outside the first connecting surface 621. The first connecting surface 621 is flush with the inner surface of the muffler pipe 20. The second connecting surface 622 gradually expands from its end face towards the second connecting plate 610.

[0049] In this embodiment, a second connecting part 60 is provided at the inlet 240 end of the muffler pipe 20. The second connecting part 60 includes a second connecting plate 610 and a third connecting plate 620. The second connecting plate 610 surrounds the muffler pipe 20 and is perpendicular to the muffler pipe 20. The second connecting plate 610 is provided with a threaded hole 70 to connect the noise reduction component 100 and other components by screws. The connection method is simple and convenient, and the connection is firm and reliable.

[0050] Furthermore, the second connecting portion 60 also includes a third connecting plate 620. The third connecting plate 620 includes a first connecting surface 621 and a second connecting surface 622 disposed opposite to each other. The first connecting surface 621 is flush with the inner surface of the silencer pipe 20, and the second connecting surface 622 gradually expands from the end face of the second connecting plate 610. When connecting the noise reduction assembly 100 to other components, the third connecting plate 620 is inserted into the other components, and the second connecting plate 610 and the other components are fixed with screws. The second connecting surface 622 gradually expands from the end face of the second connecting plate 610, which facilitates the insertion of the third connecting plate 620, thereby facilitating the connection between the noise reduction assembly 100 and other components. Furthermore, the third connecting plate 620 is positioned between the second connecting plate 610 and other components to prevent water from flowing out from the gaps between the second connecting plate 610 and other components.

[0051] This utility model embodiment also provides a seawater cooling device 200, such as Figure 6 and Figure 7 As shown, the system includes a water pump 300, a valve 400, and a noise reduction component 100 as described in any of the above embodiments. The water pump 300 is used to transport seawater. The noise reduction component 100 is detachably disposed between the water pump 300 and the valve 400.

[0052] In this embodiment, the seawater cooling device 200 includes a water pump 300, a valve 400, and a noise reduction component 100, which is disposed between the water pump 300 and the valve 400. During operation, seawater is pumped to the noise reduction component 100 via the water pump 300. The outlet of the water pump 300 experiences high pressure, which easily generates turbulence and cavitation, thus producing noise. Turbulence is also easily generated at the outlet of the valve 400 because the flow velocity changes drastically as water passes through it, causing irregular random motion and turbulence, which also generates noise. The noise reduction component 100, positioned between the water pump 300 and the valve 400, reduces the noise caused by seawater turbulence and cavitation, thereby lowering the noise level during operation of the seawater cooling device 200.

[0053] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. A noise reduction component for marine seawater pipelines, characterized in that, include: A housing that defines a first silencing cavity, and an opening that communicates with the first silencing cavity; A silencer pipe, comprising a pipe wall and a pipe bottom connected to the pipe wall, wherein the silencer pipe is inserted into the first silencer cavity through the opening, the pipe bottom is located within the first silencer cavity, and there is a gap between the pipe wall and the shell; water flows in from the inlet of the silencer pipe; A throttling orifice is provided on the pipe wall.

2. The noise reduction component according to claim 1, characterized in that, The housing is provided with a groove, and the groove opening faces away from the first silencing cavity; The noise reduction component also includes a housing, which covers the groove opening of the recess to define a second sound-absorbing cavity with the housing; The groove has sound-absorbing micropores on its bottom.

3. The noise reduction component according to claim 2, characterized in that, The second silencing cavity is filled with silencing material.

4. The noise reduction component according to claim 3, characterized in that, The sound-absorbing material is epoxy putty; The thickness of the epoxy putty is 30mm to 50mm.

5. The noise reduction component according to claim 2, characterized in that, The housing includes: The inlet section includes a first inlet section and a second inlet section. The inner surface of the first inlet section is in contact with the outer surface of the pipe wall. The second inlet section is connected to the first inlet section, and the inner surface of the second inlet section gradually expands away from the first inlet section. A noise-absorbing section is connected to the second inlet section, and the noise-absorbing micropores are located on the noise-absorbing section.

6. The noise reduction component according to claim 5, characterized in that, The throttling orifices are uniformly arranged around the pipe wall; along the diameter direction of the silencer pipe, the projection of the throttling orifice on the shell is located on the silencer section; The silencing section is a straight pipe; the ratio of the diameter of the throttling orifice to the distance between the pipe wall of the silencing pipe and the silencing section is 1:3 to 1:

5.

7. The noise reduction component according to claim 5, characterized in that, The housing also includes: The outlet section includes a first outlet section and a second outlet section, wherein the first outlet section is disposed between the silencing section and the second outlet section; The inner surface of the first outlet section tapers away from the silencing section; The second outlet section is provided with a first connecting part, the first connecting part including a first connecting plate, the first connecting plate being perpendicular to the second outlet section; the first connecting plate is provided with a threaded hole.

8. The noise reduction component according to claim 1, characterized in that, The bottom of the pipe is curved, and there is a smooth transition between the bottom of the pipe and the pipe wall.

9. The noise reduction component according to claim 1, characterized in that, A second connecting part is provided at the inlet of the silencer pipe, and the second connecting part is fitted onto the inlet end of the silencer pipe; the second connecting part includes: The second connecting plate is perpendicular to the silencer pipe and has threaded holes. A third connecting plate is connected to the second connecting plate. The third connecting plate is located on the side of the second connecting plate away from the bottom of the pipe, and the end face of the third connecting plate extends beyond the end face of the inlet of the silencer pipe. The third connecting plate includes a first connecting surface and a second connecting surface opposite each other, with the second connecting surface located outside the first connecting surface; the first connecting surface is flush with the inner surface of the silencer pipe; and the second connecting surface is gradually extended from its end face towards the second connecting plate.

10. A seawater cooling device, characterized in that, include: Water pump, the water pump being used to transport seawater; valve; The noise reduction component as described in any one of claims 1 to 9, wherein the noise reduction component is detachably disposed between the water pump and the valve.

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