Filtering device with noise reduction function

Abstract

The filtering device with the noise reduction function comprises a pressure-bearing shell, a liquid inlet pipeline is arranged at the left end of the pressure-bearing shell, a liquid outlet pipeline is arranged at the right end of the pressure-bearing shell, and seawater flows in from the liquid inlet pipeline and flows out from the liquid outlet pipeline; an inlet noise reduction assembly is arranged at the liquid inlet pipeline, an outlet noise reduction assembly is arranged at the liquid outlet pipeline, the pressure-bearing shell is provided with a filter screen and an internal noise reduction assembly, the filter screen is used for filtering impurities in seawater, and the inlet noise reduction assembly, the internal noise reduction assembly and the outlet noise reduction assembly are matched to be used for absorbing flow-induced vibration of the seawater; according to the filtering device with the noise reduction function, the filtering function and the noise reduction function are integrated in the same equipment, the structural compactness and the overall performance of the equipment are greatly improved, the space occupation of a system is effectively reduced, and weight reduction and miniaturization development of the system are facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ocean engineering, in particular to a filtering device with noise reduction function. BACKGROUND

[0002] In the operation system of marine engineering equipment such as ships and offshore platforms, the seawater pipeline system undertakes the key functions of cooling, fire fighting, flushing, etc., and its operation reliability directly affects the operation efficiency and safety performance of the entire equipment. As the conveying medium of the pipeline, seawater contains suspended impurities such as silt and algae, which can easily cause damage to downstream equipment. At the same time, the pump body start-stop and valve opening-closing operations in the pipeline system will also produce significant flow-induced vibration noise, which will be transmitted and diffused through the seawater medium, interfering with the normal operation of the ship's acoustic detection equipment and causing adverse effects on the crew and marine life. Therefore, a filtering device and a noise reduction device are usually configured in the seawater pipeline system.

[0003] At present, the filtering and noise reduction requirements of seawater pipelines in the prior art are usually achieved by independent devices, such as the Chinese patent "Structure of fine filtration type seawater filter" with publication number CN113200619A, which optimizes the layout and sealing structure design of the filter screen assembly to achieve efficient filtration of seawater and convenient maintenance of the equipment, effectively reducing the size and weight of the equipment under the same flow rate. However, such filtering devices only focus on impurity separation function and do not consider pipeline noise problems.

[0004] In terms of noise reduction, the current method for controlling flow-induced vibration in pipelines is to install silencers and other auxiliary equipment in the pipeline to attenuate and filter the flow-induced vibration. The silencers in the seawater pipeline are mainly installed on both sides of the pump. Considering the space environment restrictions, the installation of silencers not only squeezes the occupied space of other equipment, but also is not conducive to the development of the performance of other equipment. SUMMARY

[0005] Therefore, the present application aims to provide a filtering device with noise reduction function to solve the problem that the seawater filtering device in the prior art does not have noise reduction function, or the noise reduction device occupies a large space, which is not conducive to the miniaturization of the equipment.

[0006] To achieve the above-mentioned purpose, the technical solution of the present application is as follows:

[0007] A filtering device with noise reduction function, comprising a pressure-bearing shell, the left end of the pressure-bearing shell is provided with an inlet pipeline, and the right end is provided with an outlet pipeline, seawater flows into the inlet pipeline and flows out of the outlet pipeline;

[0008] An inlet noise reduction component is provided at the liquid inlet pipe, and an outlet noise reduction component is provided at the liquid outlet pipe. The pressure-bearing shell is provided with a filter screen and an internal noise reduction component. The filter screen is used to filter impurities in seawater. The inlet noise reduction component, the internal noise reduction component, and the outlet noise reduction component work together to absorb the flow-induced vibration of seawater.

[0009] Furthermore, the imported noise reduction component includes an imported noise reduction airbag and a ring-shaped protective net, wherein the imported noise reduction airbag is used to absorb the flow-induced vibration of seawater;

[0010] A sealing flange is provided at the left end of the liquid inlet pipe, and an installation part is provided on the inner side of the liquid inlet pipe. The inlet noise reduction airbag and the annular protective net are located in the installation part, and the annular protective net is spaced apart on the side of the inlet noise reduction airbag close to the axis of the liquid inlet pipe to limit and protect the inlet noise reduction airbag. The inlet noise reduction airbag, the sealing flange and the installation part form an inlet chamber.

[0011] An inlet shut-off valve is installed at the upper end of the liquid inlet pipeline. The inlet shut-off valve is connected to the inlet chamber and is used to regulate the air pressure in the inlet chamber.

[0012] Furthermore, the internal noise reduction component includes a fixing plate, and an internal protective net and an internal noise reduction airbag are provided at the lower end of the fixing plate. The internal noise reduction airbag and the fixing plate form an internal cavity. The internal protective net is spaced outside the internal noise reduction airbag to limit and protect the internal noise reduction airbag, and the internal protective net is located inside the filter screen.

[0013] Furthermore, the filter screen is provided with an opening, which is connected to the liquid inlet pipe for introducing seawater into the filter screen.

[0014] Furthermore, the fixing plate is provided with an air inlet, and an internal shut-off valve is provided at the upper end of the fixing plate. The internal shut-off valve is connected to the internal chamber through the air inlet and is used to regulate the air pressure in the internal chamber.

[0015] Furthermore, a top cover is provided at the upper end of the pressure-bearing housing, and the top cover is connected and fixed together with the pressure-bearing housing by a first fastener;

[0016] The top cover and the fixing plate work together to fix the internal noise reduction components.

[0017] Furthermore, the upper end of the filter screen is provided with a first mounting port, and the upper end of the top cover is provided with a second mounting port. The first mounting port and the second mounting port are provided correspondingly, and the internal protective net passes through the second mounting port and the first mounting port in sequence to be installed inside the filter screen.

[0018] Furthermore, the upper end of the fixing plate is provided with an air inlet pipe, the upper end of the top cover is provided with an inflation device, and the top cover is provided with a first clearance opening, through which the air inlet pipe is connected to the inflation device.

[0019] Furthermore, the inflation device includes an internal shut-off valve and a pressure cap. The internal shut-off valve is located at the upper end of the pressure cap. The pressure cap is fixed to the top cover by a second fastener. The pressure cap is provided with a second clearance port. The air inlet pipe communicates upward with the internal shut-off valve through the first clearance port and the second clearance port.

[0020] Furthermore, the upper end of the top cover is provided with a mounting groove, which surrounds the outside of the first clearance opening. A spacer ring is provided in the mounting groove. A first O-ring is provided at the end of the spacer ring near the air intake pipe, and a second O-ring is provided at the end of the spacer ring away from the air intake pipe. The upper end of the spacer ring abuts against the pressure cap, and the lower end abuts against the top cover, which is used to enhance the sealing between the air intake pipe and the top cover.

[0021] Compared with existing technologies, the noise reduction filter device of the present invention has the following advantages:

[0022] 1) Integrating filtration and noise reduction functions into the same device significantly improves the device's structural compactness and overall performance, effectively reduces the system's space occupation, and contributes to the system's weight reduction and miniaturization.

[0023] 2) The expansion degree of the noise-reducing airbag can be adjusted by using the shut-off valve. Staff can regularly check the pressure changes inside the noise-reducing airbag and adjust the internal pressure in a timely manner to effectively ensure the noise reduction performance of the noise-reducing airbag. Attached Figure Description

[0024] Figure 1 This is a cross-sectional view of the filtering device described in Embodiment 1 of the present invention;

[0025] Figure 2 for Figure 1 A magnified schematic diagram of the partial structure at point A in the middle;

[0026] Figure 3 This is a cross-sectional view of the filtration device described in Embodiment 2 of the present invention;

[0027] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point B in the middle.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Pressure-bearing housing; 11. Filter screen; 110. Opening; 111. First mounting port; 12. Sealing flange; 13. Top cover; 131. First clearance opening; 132. Second mounting port; 133. Mounting groove; 2. Liquid inlet pipe; 20. Liquid inlet pipe axis; 21. Mounting part; 22. Inlet shut-off valve; 3. Liquid outlet pipe; 4. Inlet noise reduction component; 41. Inlet noise reduction airbag; 42. Annular protective net; 5. Outlet noise reduction component; 6. Internal noise reduction component; 61. Fixing plate; 610. Air inlet; 62. Internal protective net; 63. Internal noise reduction airbag; 64. Air inlet pipe; 7. Inflation device; 71. Internal shut-off valve; 72. Pressure cap; 8. Spacer ring; 81. First O-ring seal; 82. Second O-ring seal; 101. First fastener; 102. Second fastener. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the described embodiments are only some, not all, of the embodiments of this invention. The specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0031] Example 1

[0032] like Figures 1-2 As shown, this embodiment provides a filtration device with noise reduction function, including a pressure-bearing housing 1. The left end of the pressure-bearing housing 1 is provided with an inlet pipe 2, and the right end is provided with an outlet pipe 3. Seawater flows in through the inlet pipe 2 and flows out through the outlet pipe 3.

[0033] An inlet noise reduction component 4 is provided at the inlet pipe 2, and an outlet noise reduction component 5 is provided at the outlet pipe 3. The pressure-bearing shell 1 is provided with a filter screen 11 and an internal noise reduction component 6. The filter screen 11 is used to filter impurities in seawater. The inlet noise reduction component 4, the internal noise reduction component 6 and the outlet noise reduction component 5 work together to absorb the flow-induced vibration of seawater.

[0034] The noise reduction filtration device provided in this application integrates filtration and noise reduction functions into a single device, breaking the existing technology's reliance on separate equipment for filtration and noise reduction. Specifically, the filter screen 11 is dedicated to filtering suspended impurities such as silt and algae from seawater, preventing clogging and damage to downstream equipment; the inlet noise reduction component 4, the internal noise reduction component 6, and the outlet noise reduction component 5 work together to absorb flow-induced vibration noise generated in the seawater pipeline due to pump start-up and valve opening and closing.

[0035] This integrated "filtration + noise reduction" setup combines filtration and noise reduction functions within a limited space, eliminating the need for separate noise reduction equipment. This significantly improves the structural compactness and overall performance of the equipment, effectively reduces the system's space occupation, and contributes to the system's weight reduction and miniaturization, meeting the high space utilization requirements of marine engineering equipment such as ships and offshore platforms.

[0036] Preferably, the export noise reduction component 5 has the same structure as the import noise reduction component 4.

[0037] Preferably, the filter screen 11 can adopt different opening forms according to the filtration accuracy. When the plate is punched, the thickness of the plate can be selected from different thicknesses such as 3mm, 4mm, and 5mm according to the pressure bearing capacity. It can also be formed by wedge mesh processing or manufactured by 3D printing.

[0038] Preferably, the filtration accuracy of the filter screen 11 is 50um to 10mm.

[0039] As a preferred example of this application, the imported noise reduction component 4 includes an imported noise reduction airbag 41 and a ring-shaped protective net 42, wherein the imported noise reduction airbag 41 is used to absorb the flow-induced vibration of seawater.

[0040] A sealing flange 12 is provided at the left end of the liquid inlet pipe 2, and an installation part 21 is provided on the inner side of the liquid inlet pipe 2. The inlet noise reduction airbag 41 and the annular protective net 42 are located inside the installation part 21, and the annular protective net 42 is spaced apart on the side of the inlet noise reduction airbag 41 near the axis 20 of the liquid inlet pipe, for limiting and protecting the inlet noise reduction airbag 41. The inlet noise reduction airbag 41, the sealing flange 12 and the installation part 21 form an inlet chamber.

[0041] An inlet shut-off valve 22 is provided at the upper end of the liquid inlet pipeline 2. The inlet shut-off valve 22 is connected to the inlet chamber and is used to regulate the air pressure in the inlet chamber.

[0042] Specifically, the imported noise-reducing airbag 41, as the core noise-reducing element, can directly absorb the flow-induced vibrations generated by seawater flowing in the inlet pipe 2, attenuating noise transmission at the source. The imported noise-reducing airbag 41 is arranged around the inlet pipe 2, and its annular structure can form a full-body fit with the inner wall of the pipe, effectively absorbing vibrations in different directions and improving the noise reduction effect during the inlet stage. The annular protective net 42 is spaced on the side of the imported noise-reducing airbag 41 near the axis 20 of the inlet pipe. It can not only prevent the airbag from being excessively deformed or damaged due to direct impact from seawater, but also provide structural support for the airbag, ensuring that it maintains a stable shape under the pressure of the inlet chamber and maintaining the continuity of the noise reduction effect.

[0043] In addition, the inlet shut-off valve 22 is connected to the inlet chamber, which can change the expansion degree of the inlet noise reduction airbag 41 by adjusting the air pressure in the inlet chamber. The staff can regularly check the pressure changes inside the noise reduction airbag and adjust the internal pressure in time to effectively ensure the noise reduction performance of the noise reduction airbag. When the water flow vibration is strong, the air pressure can be increased appropriately to make the airbag fuller and improve the vibration absorption capacity. When it is necessary to reduce the pipeline resistance or maintain the airbag, the air pressure can be reduced to shrink the airbag, which greatly enhances the adaptability of the equipment to the working conditions.

[0044] Preferably, the imported noise-reducing airbag 41 is made of noise-reducing materials, such as hydrogenated nitrile butadiene composite damping material.

[0045] Preferably, the ring-shaped protective net 42 is made of perforated plate. Depending on the pressure bearing capacity, the wall thickness can be selected from different thicknesses such as 3mm, 4mm, and 5mm; the perforation diameter can be selected from different diameters such as 2mm, 3mm, and 4mm.

[0046] Preferably, the liquid inlet pipe 2 and the sealing flange 12 are fixed together by a connector.

[0047] Preferably, the left end of the sealing flange 12 is provided with a first left fixing groove and a second left fixing groove, the right end of the first mounting part 21 is provided with a first right fixing groove and a second right fixing groove, the left end of the inlet noise reduction airbag 41 is installed in the first left fixing groove, the right end is installed in the first right fixing groove, the left end of the annular protective net 42 is installed in the second left fixing groove, and the right end is installed in the second right fixing groove.

[0048] Preferably, when inspecting and maintaining the imported noise reduction component 4 and the exported noise reduction component 5, the corresponding sealing flanges can be disassembled, which is convenient and quick.

[0049] As a preferred example of this application, the internal noise reduction component 6 includes a fixing plate 61. The lower end of the fixing plate 61 is provided with an internal protective net 62 and an internal noise reduction airbag 63. The internal noise reduction airbag 63 and the fixing plate 61 enclose an internal cavity. The internal protective net 62 is spaced apart outside the internal noise reduction airbag 63 to limit and protect the internal noise reduction airbag 63. The internal protective net 62 is located inside the filter screen 11.

[0050] Specifically, the internal noise-reducing airbag 63, as a key noise-reducing element inside the pressure-bearing shell 1, directly acts on the seawater flow field after being filtered by the filter screen 11, and can specifically absorb the flow-induced vibrations generated during the filtration process. Located inside the filter screen 11, it can precisely cover the vibration transmission path of seawater in the core processing area of ​​the device, supplementing the noise reduction effect of the imported noise-reducing component 4, and further enhancing the overall noise reduction capability.

[0051] The internal protective net 62 is spaced outside the internal noise reduction airbag 63. It can not only block the residual impurities after filtration from directly contacting the airbag, but also provide structural restraint when water flow impacts or the airbag is inflated, so as to avoid excessive deformation of the airbag or friction damage with the filter screen 11, and ensure that it maintains stable vibration absorption performance over a long period of time.

[0052] Preferably, both the internal protective net 62 and the internal noise-reducing airbag 63 are cylindrical.

[0053] As a preferred example of this application, the filter screen 11 is provided with an opening 110, which is connected to the liquid inlet pipe 2 for introducing seawater into the filter screen 11.

[0054] Specifically, seawater is directly introduced into the filter screen 11 through the opening 110, which reduces the meandering flow within the pressure-bearing shell 1, shortens the path length from the inlet to the filter, reduces water flow energy loss, and improves filtration efficiency. At the same time, the directional flow reduces turbulence and eddies in the seawater within the shell, and in conjunction with the internal noise reduction component 6, further mitigates flow field fluctuations, indirectly enhancing the noise reduction effect and achieving synergistic optimization of filtration and noise reduction.

[0055] As a preferred example of this application, the fixing plate 61 is provided with an air inlet 610, and an inflation device 7 is provided at the upper end of the fixing plate 61. The inflation device 7 is connected to the internal chamber through the air inlet 610 and is used to adjust the air pressure of the internal chamber.

[0056] Specifically, the inflation device 7 is connected to the internal chamber via the air inlet 610, which can directly adjust the air pressure inside the chamber, thereby controlling the expansion degree of the internal noise-reducing airbag 63, ensuring that the internal noise-reducing airbag 63 is always in the best working state, avoiding the impact of air pressure fluctuations on the vibration absorption performance of the airbag, and extending the service life of the airbag.

[0057] When the seawater flow in the pipeline causes strong vibrations, the air pressure in the internal chamber can be increased by the inflation device 7, making the internal noise-reducing airbag 63 fuller, improving its ability to absorb vibrations, and enhancing the noise reduction effect. When the water flow velocity is low and the vibration is small, the air pressure can be appropriately reduced to avoid the airbag from over-expanding and affecting the seawater flow efficiency and reducing pipeline resistance. If the internal noise-reducing airbag 63 leaks slightly and its performance deteriorates, it can also be replenished with air in time by the inflation device 7 to restore its working state. This setting improves the environmental adaptability of the equipment.

[0058] As a preferred example of this application, the upper end of the pressure-bearing housing 1 is provided with a top cover 13, and the top cover 13 is connected and fixed together with the pressure-bearing housing 1 by a first fastener 101;

[0059] The top cover 13 cooperates with the fixing plate 61 to fix the internal noise reduction component 6.

[0060] Specifically, the top cover 13 and the fixing plate 61 work together to fix the internal noise reduction component 6, providing a stable installation benchmark for core noise reduction components such as the internal protective net 62 and the internal noise reduction airbag 63, avoiding the impact force generated by seawater flow that causes the components to shift or shake, and ensuring that the internal noise reduction component 6 is always in the preset working position to maintain a stable vibration absorption effect.

[0061] Preferably, the lower end of the fixing plate 61 is provided with a first connector, and the upper end of the top cover 13 is provided with a second connector. The first connector and the second connector cooperate to fix the connection between the fixing plate 61 and the top cover 13.

[0062] A sealing element is provided between the first connector and the second connector.

[0063] Preferably, the first connector is an annular protrusion, the second connector is an annular groove, and the sealing element is an O-ring. The O-ring is installed in the annular groove to enhance the sealing effect between the annular protrusion and the annular groove.

[0064] As a preferred example of this application, the upper end of the filter screen 11 is provided with a first mounting port 111, and the upper end of the top cover 13 is provided with a second mounting port 132. The first mounting port 111 and the second mounting port 132 are provided correspondingly, and the internal protective net 62 is installed inside the filter screen 11 by passing through the second mounting port 132 and the first mounting port 111 in sequence.

[0065] Specifically, the first mounting port 111 and the second mounting port 132 are set accordingly, providing two positioning points for the internal protective net 62, ensuring that it can be accurately installed inside the filter screen 11 along the preset axis, avoiding friction between the internal protective net 62 and the inner wall of the filter screen 11 due to installation offset; and the internal protective net 62 can form a multi-node fixation with the fixing plate 61 and the top cover 13, further improving the structural stability under water flow impact.

[0066] The installation method in this embodiment can reduce the overall height of the filter device, thereby reducing the requirements for height space, and is especially suitable for scenarios where the installation height is limited.

[0067] Example 2

[0068] like Figures 3-4 As shown, compared with Embodiment 1, the difference is that the upper end of the fixing plate 61 is provided with an air inlet pipe 64, the upper end of the top cover 13 is provided with an inflation device 7, and the top cover 13 is provided with a first clearance opening 131, and the air inlet pipe 64 is connected to the inflation device 7 through the first clearance opening 131.

[0069] Specifically, the air inlet pipe 64 is completely isolated from the seawater flow channel inside the device, which can prevent seawater from seeping into the air pressure system and causing blockage or corrosion. At the same time, it can prevent interference with seawater flow during air pressure regulation, ensuring the independent operation of filtration and noise reduction functions.

[0070] As a preferred example of this application, the inflation device 7 includes an internal shut-off valve 71 and a pressure cap 72. The internal shut-off valve 71 is disposed at the upper end of the pressure cap 72. The pressure cap 72 is fixed to the top cover 13 by a second fastener 102. The pressure cap 72 is provided with a second clearance port. The air inlet pipe 64 communicates upward with the internal shut-off valve 71 through the first clearance port 131 and the second clearance port.

[0071] Specifically, the pressure cap 72 is fixed to the top cover 13 by the second fastener 102, which not only provides a stable mounting base for the internal shut-off valve 71 and prevents the internal shut-off valve 71 from being displaced due to water flow impact or equipment vibration, but also forms an integrated structure with the inflation device 7, the top cover 13, and the air inlet pipe 64, reducing the risk of shaking of independent components and improving the structural stability of the air pressure regulation system.

[0072] When it is necessary to inspect the internal shut-off valve 71 or clean the air intake pipe 64, the pressure cap 72 can be removed simply by disassembling the second fastener 102, without disassembling the entire top cover 13, which greatly shortens the maintenance operation time. Especially in scenarios such as ships and offshore platforms where equipment downtime is sensitive, it can significantly improve operation and maintenance efficiency.

[0073] Therefore, this installation method in this embodiment facilitates the maintenance of the internal noise reduction component 6.

[0074] As a preferred example of this application, the upper end of the top cover 13 is provided with a mounting groove 133, the mounting groove 133 surrounds the outside of the first clearance opening 131, and a spacer ring 8 is provided in the mounting groove 133. A first O-ring seal 81 is provided at the end of the spacer ring 8 near the air intake pipe 64, and a second O-ring seal 82 is provided at the end away from the air intake pipe 64. The upper end of the spacer ring 8 abuts against the pressure cap 72, and the lower end abuts against the top cover 13, which is used to enhance the sealing between the air intake pipe 64 and the top cover 13.

[0075] Specifically, the spacer ring 8, as a rigid support, is in close contact with the top cover 13 under the pressure of the gland 72. This provides a stable compression space for the two O-ring seals, ensuring that the seals are always under preset compression to maintain sealing performance. It also blocks the contact between the pressure-bearing housing 1 and the outside through its own structure, forming a "rigid + elastic" composite seal with the seals. Compared with a single seal design, this design has a longer sealing life and stronger anti-interference ability.

[0076] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A filter device with noise reduction function, characterized in that, It includes a pressure-bearing shell (1), with an inlet pipe (2) at the left end and an outlet pipe (3) at the right end. Seawater flows in through the inlet pipe (2) and flows out through the outlet pipe (3). An inlet noise reduction component (4) is provided at the inlet pipe (2), and an outlet noise reduction component (5) is provided at the outlet pipe (3). The pressure-bearing shell (1) is provided with a filter screen (11) and an internal noise reduction component (6). The filter screen (11) is used to filter impurities in seawater. The inlet noise reduction component (4), the internal noise reduction component (6), and the outlet noise reduction component (5) work together to absorb the flow-induced vibration of seawater.

2. The filter device with noise reduction function according to claim 1, characterized in that, The imported noise reduction component (4) includes an imported noise reduction airbag (41) and a ring-shaped protective net (42). The imported noise reduction airbag (41) is used to absorb the flow-induced vibration of seawater. A sealing flange (12) is provided at the left end of the liquid inlet pipe (2), and an installation part (21) is provided on the inner side of the liquid inlet pipe (2). The inlet noise reduction airbag (41) and the annular protective net (42) are located inside the installation part (21), and the annular protective net (42) is spaced apart on the side of the inlet noise reduction airbag (41) close to the axis (20) of the liquid inlet pipe, for limiting protection of the inlet noise reduction airbag (41). The inlet noise reduction airbag (41), the sealing flange (12) and the installation part (21) form an inlet chamber. An inlet shut-off valve (22) is provided at the upper end of the liquid inlet pipeline (2). The inlet shut-off valve (22) is connected to the inlet chamber and is used to regulate the air pressure in the inlet chamber.

3. The filter device with noise reduction function according to claim 1, characterized in that, The internal noise reduction component (6) includes a fixing plate (61). The lower end of the fixing plate (61) is provided with an internal protective net (62) and an internal noise reduction airbag (63). The internal noise reduction airbag (63) and the fixing plate (61) form an internal cavity. The internal protective net (62) is spaced outside the internal noise reduction airbag (63) to limit and protect the internal noise reduction airbag (63). The internal protective net (62) is located inside the filter screen (11).

4. The filter device with noise reduction function according to claim 1, characterized in that, The filter screen (11) is provided with an opening (110), which is connected to the liquid inlet pipe (2) for introducing seawater into the filter screen (11).

5. The filter device with noise reduction function according to claim 3, characterized in that, The fixed plate (61) is provided with an air inlet (610), and an internal shut-off valve (71) is provided at the upper end of the fixed plate (61). The internal shut-off valve (71) is connected to the internal chamber through the air inlet (610) and is used to regulate the air pressure of the internal chamber.

6. The filter device with noise reduction function according to claim 3, characterized in that, The upper end of the pressure-bearing housing (1) is provided with a top cover (13), and the top cover (13) and the pressure-bearing housing (1) are connected and fixed together by a first fastener (101); The top cover (13) cooperates with the fixing plate (61) to fix the internal noise reduction component (6).

7. The filter device with noise reduction function according to claim 6, characterized in that, The filter screen (11) has a first mounting port (111) at its upper end, and the top cover (13) has a second mounting port (132) at its upper end. The first mounting port (111) and the second mounting port (132) are arranged correspondingly. The internal protective net (62) passes through the second mounting port (132) and the first mounting port (111) in sequence and is installed inside the filter screen (11).

8. The filter device with noise reduction function according to claim 6, characterized in that, An air inlet pipe (64) is provided at the upper end of the fixed plate (61), an inflation device (7) is provided at the upper end of the top cover (13), and the top cover (13) is provided with a first clearance opening (131). The air inlet pipe (64) is connected to the inflation device (7) through the first clearance opening (131).

9. The filter device with noise reduction function according to claim 8, characterized in that, The inflation device (7) includes an internal shut-off valve (71) and a pressure cap (72). The internal shut-off valve (71) is located at the upper end of the pressure cap (72). The pressure cap (72) is fixed to the top cover (13) by a second fastener (102). The pressure cap (72) is provided with a second clearance port. The air inlet pipe (64) is connected to the internal shut-off valve (71) through the first clearance port (131) and the second clearance port.

10. The filter device with noise reduction function according to claim 9, characterized in that, The top cover (13) is provided with an installation groove (133) at its upper end. The installation groove (133) surrounds the outside of the first clearance opening (131). A spacer ring (8) is provided in the installation groove (133). A first O-ring seal (81) is provided at the end of the spacer ring (8) near the air intake pipe (64), and a second O-ring seal (82) is provided at the end away from the air intake pipe (64). The upper end of the spacer ring (8) abuts against the pressure cap (72), and the lower end abuts against the top cover (13), which is used to enhance the sealing between the air intake pipe (64) and the top cover (13).

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