Pressure-resistant seawater filter

Abstract

The utility model discloses a pressure-resistant seawater filter, which relates to the technical field of seawater filtration and comprises a base frame, a filter outer cylinder is fixedly mounted on the inner side of the base frame, a filter element is mounted in the filter outer cylinder through bolts, and a clamping mechanism is arranged at the bottom of the filter outer cylinder. And a filtering mechanism is mounted at the bottom of the filter outer cylinder through a clamping mechanism. By adopting the structure and arranging the filtering mechanism, the device can be connected with a ship body water supply pipeline, the submersible pump is used for sucking water under negative pressure, seawater is purified through the filter element, the filter screen cover filters impurities in advance, meanwhile, water flow pushes the turbine to drive the rotating shaft and the cleaning brush plate to rotate, the filter screen cover is automatically cleaned, and an additional motor is not needed; the outer supporting and fixing barrel and the supporting and fixing strips reinforce the filter outer barrel, the supporting and fixing rings assist in supporting, the stability and the pressure resistance are enhanced, automatic cleaning and stable supporting are achieved through the overall design, the filtering efficiency and the equipment reliability are improved, the maintenance process is simplified, and use is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of seawater filtration, and particularly relates to a pressure-resistant seawater filter. Background Art

[0002] A seawater filter is a filter that filters impurities in seawater. It is mainly installed at the outboard water inlet main pipe and is mainly used in the suction pipeline of a seawater pump to prevent impurities in seawater from entering the pump. The seawater filter is mainly composed of a box body, a box cover, a filter plate, and a filter screen. The flow area of ​​the filter screen is generally 1.5 to 2 times the flow cross-sectional area of ​​the pipeline. In addition, the seawater filter is an industrial automatic filter that can provide a variety of comprehensive uses. It is particularly suitable for use on ships and offshore platforms. Different numbers of filter elements can be installed in each filter to provide a large filtration area, so that the filter produces as little pressure loss as possible when in use. The working principle of the seawater filter may include suction type and brush type, etc., which use different methods to clean and filter impurities in seawater.

[0003] Traditional seawater filters have a simple structure and poor filtering effect. They cannot completely filter out impurities in seawater. Moreover, after using the filter for a period of time, the filter screen is easily clogged by accumulated debris, causing the internal water pressure of the filter to increase, which may cause equipment damage in severe cases. After the filter screen is clogged, it has to be cleaned manually, which is time-consuming and labor-intensive, and inconvenient to use.

[0004] A Chinese patent with publication number "CN211676572U" discloses a high-efficiency seawater filter, which includes a filter and an auxiliary filtering device. The auxiliary filtering device is installed on one side of the filter, adopts a multi-stage filtering structure, uses a filter screen in the auxiliary filtering device for preliminary coarse filtering, and at the same time, the interior of the filter is divided into a first filter chamber and a second filter chamber by a partition plate, and subsequent filtering is performed by a filter element and a filter plate mechanism arranged inside the first filter chamber and the second filter chamber. The three-stage filtering mechanism performs filtering in sequence to improve the filtering effect. A cleaning mechanism is arranged inside the auxiliary filtering device, and a motor, a screw, a fixing kit, a bracket and a cleaning scraper are used to scrape off the debris accumulated on the filter screen, and the debris is discharged through a sewage pipe, thereby avoiding the trouble of manual cleaning, and at the same time reducing the pressure of the filter element inside the filter, extending the service life of the filter element, and reducing the number of times the filter element is cleaned; the high-efficiency seawater filter is practical and convenient, and has a good filtering effect.

[0005] During use, the above-mentioned device can have good filtering and screening performance, but its cleaning method adopts a motor-driven scraper to assist in cleaning. However, during use, a corresponding motor is separately set to drive the scraper underwater for cleaning, and the overall use cost is high. In addition, the motor also needs to be equipped with an additional waterproof structure, and the overall use cost is high. During use, the filter screen structure is not easy to disassemble and repair, and the overall maintenance is cumbersome and inconvenient, so it needs to be improved. Utility Model Content

[0006] In view of the problems mentioned in the background technology, the purpose of the utility model is to provide a pressure-resistant seawater filter to solve the problems raised in the background technology.

[0007] The above technical objectives of the utility model are achieved through the following technical solutions:

[0008] A pressure-resistant seawater filter comprises a base frame, a filter outer cylinder is fixedly mounted on the inner side of the base frame, a filter core is mounted inside the filter outer cylinder by bolts, a clamping mechanism is provided at the bottom of the filter outer cylinder, a filter mechanism is mounted on the bottom of the filter outer cylinder by the clamping mechanism, the filter mechanism is arranged at the bottom input end of the filter outer cylinder, a connecting pipe is fixedly mounted on the top of the filter outer cylinder, a submersible pump is fixedly mounted on the top of the connecting pipe, a drain pipe is fixedly mounted on the output end of the submersible pump, and a supporting assembly is fixedly mounted on the outer side of the filter outer cylinder;

[0009] The support assembly includes an outer support cylinder, which is fixedly installed on the outside of the filter outer cylinder. Support bars are fixedly installed at equal intervals on the outside of the outer support cylinder. Support rings are also fixedly installed at equal intervals on the outside of the outer support cylinder. The support rings and support bars are fixedly connected.

[0010] As a preferred technical solution, a connecting flange is fixedly installed at the output end of the drain pipe, and the side shape of the drain pipe is L-shaped.

[0011] As a preferred technical solution, support plates are installed at equal intervals on the bottom of the base frame by bolts, and the support plates are set to be stainless steel plates.

[0012] As an optimal technical solution, the clamping mechanism includes a fixed block and a bottom ring, the fixed block is fixedly installed on the lower ends of both sides of the filter outer cylinder, the bottom ring is arranged at the bottom of the base frame, and support plates are fixedly installed on the top of the bottom ring at equal intervals, and concave frames are fixedly installed on the outer sides of two groups of support plates in the support plates arranged at equal intervals, and a limiting spring is fixedly installed on the inner side of the concave frame, and a limiting plate is fixedly installed on the inner end of the limiting spring, and a limiting groove is provided on the outer side of the fixed block, and the end of the limiting plate is inserted into the inner side of the limiting groove.

[0013] As a preferred technical solution, a slope is provided on the top of the limiting plate, and the side surface of the limiting plate is in the shape of a right-angled trapezoid.

[0014] As a preferred technical solution, a connecting shaft is fixedly installed on the outer side of the limiting plate, and a pull ring is fixedly installed on the outer end of the connecting shaft passing through the limiting plate.

[0015] As an optimal technical solution, the filtering mechanism includes a filter screen cover, which is arranged in a cone shape and fixedly mounted on the bottom of the bottom ring. The inner side of the filter screen cover is rotatably connected to a rotating shaft, a turbine is fixedly mounted on the top of the rotating shaft, and the upper end of the turbine is inserted into the bottom of the inner cylinder of the filter. The bottom of the rotating shaft passes through the filter screen cover and is fixedly mounted with a cleaning brush plate at equal intervals. The inner side of the cleaning brush plate is fit-connected to the outer surface of the filter screen cover.

[0016] In summary, the utility model mainly has the following beneficial effects:

[0017] First, by setting up a clamping mechanism, the device simplifies the installation and disassembly process of the filter. During installation, the bottom ring covers the bottom of the outer cylinder of the filter, the support plate fits with the fixed block, the limit plate shrinks after being compressed, and is inserted into the limit groove during reset to stabilize the connection between the bottom plate and the base frame. During disassembly, the limit spring is pulled out of the limit groove to make the limit plate detach from the limit groove, thereby quickly disassembling the bottom ring and the filter mechanism. This design greatly improves the convenience of inspection and disassembly, facilitates rapid inspection and maintenance of the inside of the filter, and improves the maintenance efficiency and operation convenience of the equipment;

[0018] Second, by setting up a filtering mechanism, the device can be connected to the water supply pipe of the hull, use the negative pressure of the submersible pump to absorb water, purify seawater through the filter element, and the filter cover first filters impurities. At the same time, the water flow drives the turbine to drive the rotating shaft and the cleaning brush plate to rotate, and automatically clean the filter cover without the need for an additional motor. The outer support cylinder and the support bar reinforce the outer cylinder of the filter, and the support ring provides auxiliary support to enhance stability and pressure resistance. The overall design realizes automatic cleaning and stable support, improves filtering efficiency and equipment reliability, simplifies the maintenance process, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the utility model when viewed from above;

[0021] Figure 3 It is a schematic diagram of the top view of the structure of the utility model in the unpacked state;

[0022] Figure 4 This is a schematic diagram of the utility model in a disassembled state when viewed from above;

[0023] Figure 5 It is a schematic diagram of the structure of the filtering mechanism and the clamping mechanism of the utility model.

[0024] Figure numerals: 1. base frame; 2. filter outer cylinder; 3. filter element; 4. connecting pipe; 5. clamping mechanism; 51. fixing block; 52. bottom ring; 53. support plate; 54. concave frame; 55. limit spring; 56. limit plate; 57. limit groove; 58. inclined surface; 59. connecting shaft; 6. filtering mechanism; 61. filter screen; 62. rotating shaft; 63. turbine; 64. cleaning brush plate; 7. submersible pump; 8. drain pipe; 9. supporting assembly; 91. outer supporting cylinder; 92. supporting strip; 93. supporting ring; 10. connecting flange; 11. support plate. DETAILED DESCRIPTION

[0025] Example

[0026] refer to Figures 1 to 5 A pressure-resistant seawater filter of this embodiment includes a base frame 1, a filter outer cylinder 2 is fixedly installed on the inner side of the base frame 1, a filter core 3 is installed inside the filter outer cylinder 2 by bolts, a clamping mechanism 5 is provided at the bottom of the filter outer cylinder 2, a filter mechanism 6 is installed at the bottom of the filter outer cylinder 2 by the clamping mechanism 5, the filter mechanism 6 is arranged at the bottom input end of the filter outer cylinder 2, a connecting pipe 4 is fixedly installed on the top of the filter outer cylinder 2, a submersible pump 7 is fixedly installed on the top of the connecting pipe 4, a drain pipe 8 is fixedly installed on the output end of the submersible pump 7, and a supporting component 9 is fixedly installed on the outer side of the filter outer cylinder 2;

[0027] The support assembly 9 includes an outer support cylinder 91, which is fixedly installed on the outer side of the filter outer cylinder 2. Support bars 92 are fixedly installed at equal intervals on the outer side of the outer support cylinder 91. Support rings 93 are also fixedly installed at equal intervals on the outer side of the outer support cylinder 91. The support rings 93 and the support bars 92 are fixedly connected. The filter outer cylinder 2 is fixed to the inner side of the base frame 1. The filter element 3 is installed inside by bolts to filter seawater. A clamping mechanism 5 is provided at the bottom for installing a filtering mechanism 6 to ensure that the seawater is preliminarily filtered before entering the filter outer cylinder 2. The top is connected to a submersible pump 7 through a connecting pipe 4, and the negative pressure generated by the submersible pump 7 is used to assist in water absorption, and the purified seawater is discharged through a drain pipe 8. A special design The support assembly 9 includes an outer support cylinder 91, support bars 92 and support rings 93. The outer support cylinder 91 is fixed to the outside of the filter outer cylinder 2. The support bars 92 and support rings 93 enhance the stability and pressure resistance of the overall structure, ensuring that the filter can still maintain high-efficiency filtration and stable operation under high-pressure conditions. The specific filter element 3 is made of high-performance filter material, which can be activated carbon, polypropylene, polyester, ultrafiltration membrane, reverse osmosis membrane, etc. Activated carbon filter elements are often used to remove pigments, odors and organic solvents, while ultrafiltration membranes and reverse osmosis membranes can remove bacteria, viruses, heavy metal ions and other tiny pollutants in water. The above-mentioned filtration structure is a prior art means, so it will not be repeated here.

[0028] refer to Figure 1-Figure 3The output end of the drain pipe 8 is fixedly installed with a connection flange 10. The side shape of the drain pipe 8 is set in an L shape. The output end of the drain pipe 8 is fixedly installed with a connection flange 10, which is a very important component for connecting the drain pipe 8 with other pipes or equipment. The connection flange 10 is a standardized connection element that allows a quick, convenient and reliable connection between two pipes or equipment. The L-shaped design can optimize the spatial layout and make the pipes more flexible in a limited space. At the same time, the L-shaped design makes the drain pipe 8 easier to install and maintain.

[0029] refer to Figure 1-Figure 5 The bottom of the base frame 1 is evenly spaced with support plates 11 installed by bolts, and the support plates 11 are set as stainless steel plates. The bottom of the base frame 1 is specially designed with support plates 11 installed at equal intervals. These support plates 11 are made of stainless steel, which not only has excellent corrosion resistance and can resist the erosion of salt and other corrosive substances in seawater for a long time, but also has high strength and stability, which is enough to support the weight of the entire filter and resist the pressure and impact of the external environment. In addition, the smooth surface of the stainless steel plate is easy to clean and maintain, which reduces the adhesion of dirt and impurities, and further ensures the long-term stable operation of the filter. Such a design enables the seawater filter to work for a long time in harsh marine environments, providing reliable protection for seawater filtration and purification.

[0030] refer to Figure 4-Figure 5The clamping mechanism 5 includes a fixing block 51 and a bottom ring 52. The fixing block 51 is fixedly installed on the lower ends of both sides of the filter outer cylinder 2. The bottom ring 52 is arranged at the bottom of the base frame 1. Support plates 53 are fixedly installed on the top of the bottom ring 52 at equal intervals. The outer sides of two groups of support plates 53 in the support plates 53 arranged at equal intervals are fixedly installed with concave frames 54. A limiting spring 55 is fixedly installed on the inner side of the concave frame 54. A limiting plate 56 is fixedly installed on the inner end of the limiting spring 55. A limiting groove 57 is provided on the outer side of the fixing block 51. The end of the limiting plate 56 is inserted into the inner side of the limiting groove 57. The clamping mechanism 5 is responsible for firmly connecting the filter outer cylinder 2 and the base frame 1. The mechanism includes a fixing block 51 and a bottom ring 52. The fixing block 51 is fixedly installed on the lower ends of both sides of the filter outer cylinder 2, providing a positioning point for the installation of the bottom ring 52. The bottom ring 52 is arranged at the bottom of the base frame 1, carrying the entire filtering mechanism 6. The top of the bottom ring 52 is evenly spaced. The support plates 53 are installed, which not only provide support but also serve to install the concave frames 54. Concave frames 54 are fixed on the outside of the two groups of specific support plates 53. Limit springs 55 are installed inside the concave frames 54. The inner ends of the springs are connected to limit plates 56. These limit plates 56 can be extended and retracted under the action of the springs to meet the needs of installation and disassembly. Limit grooves 57 are specially provided on the outside of the fixed block 51, corresponding to the limit plates 56. When the bottom ring 52 is aligned with the filter outer cylinder 2 and pressed down, the limit plates 56 will be compressed by the support plates 53 and shrink inward, squeezing the limit springs 55 at the same time. When the limit plates 56 contact the limit grooves 57, the limit springs 55 will reset and push the limit plates 56 to be inserted into the limit grooves 57, thereby completing the stable installation of the filter mechanism 6. This design makes the entire filter mechanism 6 very convenient to install and disassemble, thereby improving the usability and maintenance efficiency of the seawater filter.

[0031] refer to Figure 5The top of the limit plate 56 is provided with an inclined surface 58, and the side shape of the limit plate 56 is set in a right-angled trapezoid. The design of the inclined surface 58 makes it possible that during the installation process, when the bottom ring 52 moves toward the filter outer cylinder 2, the support plate 53 will first contact the inclined surface 58 of the limit plate 56. Due to the existence of the inclined surface 58, the support plate 53 will push the limit plate 56 to shrink inward along the inclined surface 58, and at the same time squeeze the limit spring 55. When the limit plate 56 is completely retracted to the inner side of the concave frame 54, the bottom ring 52 is tightly fitted with the bottom of the filter outer cylinder 2. At this time, as the bottom ring 52 continues to be pressed downward, the limit The plate 56 will reach the position of the limit groove 57 on the outside of the fixed block 51. Due to the reset action of the limit spring 55, the limit plate 56 will quickly pop out and insert into the limit groove 57, thereby realizing a stable connection between the filter outer cylinder 2 and the base frame 1. In addition, the side shape of the limit plate 56 is designed to be a right-angled trapezoid. This shape not only enhances the strength of the limit plate 56, but also enables the limit plate 56 to better maintain stability when subjected to external force. The right-angled trapezoidal design also ensures that the limit plate 56 can be inserted into the limit groove 57 smoothly and unobstructed, further improving the reliability and ease of use of the clamping mechanism 5.

[0032] refer to Figure 5 When the filter element 2 is in the closed position, the operator can pull the pull ring to make the limit plate 56 retract inward, and squeeze the limit spring 55 at the same time. When the limit plate 56 is completely retracted to the inside of the concave frame 54, the bottom ring 52 can smoothly fit with the bottom of the filter outer cylinder 2. At this time, as the bottom ring 52 continues to be pressed downward, the limit plate 56 will pop out and be inserted into the limit groove 57 on the outside of the fixed block 51 under the action of the limit spring 55, thereby completing a stable connection. When disassembly or maintenance is required, the operator only needs to pull the pull ring again to disengage the limit plate 56 from the limit groove 57, and the bottom ring 52 can be easily separated from the filter outer cylinder 2. This design not only improves the convenience of operation, but also increases the maintenance efficiency and reliability of the filter.

[0033] refer to Figure 5The filter mechanism 6 includes a filter screen cover 61, which is set to a cone shape. The filter screen cover 61 is fixedly installed at the bottom of the bottom ring 52. The inner side of the filter screen cover 61 is rotatably connected with a rotating shaft 62. A turbine 63 is fixedly installed on the top of the rotating shaft 62. The upper end of the turbine 63 is plugged into the bottom of the filter outer cylinder 2. The bottom of the rotating shaft 62 passes through the filter screen cover 61 and is fixedly installed with cleaning brush plates 64 at equal intervals. The inner side of the cleaning brush plate 64 is fitted and connected with the outer surface of the filter screen cover 61. A rotating shaft 62 is installed on the inner side of the filter screen cover 61 by a rotatable connection. A turbine 63 is fixed on the top of the rotating shaft 62. When seawater passes through the bottom ring 52 and the filter screen cover 61 and enters the filter outer cylinder 2, the water flow will impact the turbine 63, causing it to start rotating. This design cleverly utilizes the dynamic force of the water flow. The bottom of the rotating shaft 62 passes through the filter screen cover 61, and cleaning brush plates 64 are fixedly installed at equal intervals. The inner sides of these cleaning brush plates 64 are tightly fitted with the outer surface of the filter screen cover 61. As the rotating shaft 62 rotates, the cleaning brush plates 64 will continuously slide on the outer surface of the filter screen cover 61, thereby effectively cleaning away impurities, dirt and marine organisms attached to the filter screen cover 61. This automatic cleaning design not only improves the filtration efficiency, but also greatly reduces the frequency of manual cleaning and reduces maintenance costs. At the same time, since the cleaning brush plates 64 and the filter screen cover 61 always maintain a good fit, it can ensure that every corner of the filter screen cover 61 can be thoroughly cleaned, ensuring the consistency and stability of the filtration effect.

[0034] Principle and advantages of use: By setting the clamping mechanism 5, the device can be used to cover the bottom of the filter outer tube 2 by the bottom ring 52. At this time, the support plate 53 covers the outside of the fixing block 51. During installation, the inclined surface 58 of the limiting plate 56 is compressed to cause the limiting plate 56 to resist the limiting spring 55 to shrink. The limiting plate 56 shrinks to the inside of the concave frame 54. When the limiting plate 56 contacts the limiting groove 57, the limiting spring 55 is reset to resist the limiting plate 56 and insert it into the inside of the limiting groove 57. By plugging the limiting plate 56 and the limiting groove 57 into each other, the filter can be fixed. The bottom plate is firmly mounted to the bottom of the base frame 1, and the filter screen cover 61 can be mounted on the bottom of the filter outer cylinder 2. When the filter mechanism 6 at the bottom of the filter outer cylinder 2 needs to be removed, the limit plate 56 can be driven by pulling the connecting shaft 59 to squeeze the limit spring 55 to contract. When the limit spring 55 contracts, the limit plate 56 is separated from the limit groove 57. At this time, the bottom plate and the base frame 1 lose their limit, and the bottom ring 52 and the entire filter mechanism 6 can be quickly removed, so that the device as a whole is convenient for quick inspection and disassembly of the filter mechanism 6, and convenient for the device to inspect and maintain the inside of the filter outer cylinder 2;

[0035] By setting the filtering mechanism 6, the device can be connected to the water supply pipe of the hull through the connecting flange 10 during use. At this time, by starting the submersible pump 7 to run, the submersible pump 7 can be used to generate negative pressure to assist water absorption through the connecting pipe 4 and the filter outer cylinder 2. In this process, the seawater is adsorbed and purified by the filter core 3 inside the filter outer cylinder 2. Before the water enters the filter outer cylinder 2, the seawater can be assisted by the filter screen cover 61 to filter the impurities in the seawater to the outer surface of the filter screen cover 61. In this process, the seawater flows inside the filter outer cylinder 2, and the flow of seawater can drive the turbine 63 to rotate. The rotation of the turbine 63 can assist in driving the rotating shaft 62 to rotate. At this time, the rotating shaft 6 2 can be rotated to assist in driving the cleaning brush plate 64 to rotate on the outside of the filter screen cover 61. When the cleaning brush plate 64 on the outside of the filter screen cover 61 rotates, the cleaning brush plate 64 can be attached to the outer surface of the filter screen cover 61 for brushing and cleaning, so that the device can be automatically cleaned by water pressure without the need for additional motors and other structures for cleaning, and the overall cleaning is more convenient. During use, an external support cylinder 91 is provided in conjunction with a support bar 92, and the external support cylinder 91 and the support bar 92 can be used to assist in supporting and reinforcing the filter outer cylinder 2. At this time, the support ring 93 cooperates with the external support cylinder 91 to assist in supporting and reinforcing the filter outer cylinder 2, so that the filter outer cylinder 2 as a whole can have strong stability and its pressure resistance.

Claims

1. A pressure-resistant seawater filter, comprising a base frame (1), characterized in that: A filter outer cylinder (2) is fixedly mounted on the inner side of the base frame (1), a filter core (3) is mounted inside the filter outer cylinder (2) by means of bolts, a clamping mechanism (5) is provided at the bottom of the filter outer cylinder (2), a filtering mechanism (6) is mounted at the bottom of the filter outer cylinder (2) by means of the clamping mechanism (5), the filtering mechanism (6) is arranged at the bottom input end of the filter outer cylinder (2), a connecting pipe (4) is fixedly mounted on the top of the filter outer cylinder (2), a submersible pump (7) is fixedly mounted on the top of the connecting pipe (4), a drain pipe (8) is fixedly mounted on the output end of the submersible pump (7), and a supporting assembly (9) is fixedly mounted on the outer side of the filter outer cylinder (2); The support assembly (9) comprises an outer support cylinder (91), the outer support cylinder (91) being fixedly mounted on the outer side of the filter outer cylinder (2), support strips (92) being fixedly mounted at equal intervals on the outer side of the outer support cylinder (91), and support rings (93) being fixedly mounted at equal intervals on the outer side of the outer support cylinder (91), the support rings (93) being fixedly connected to the support strips (92).

2. A pressure-resistant seawater filter according to claim 1, characterized in that: A connecting flange (10) is fixedly mounted on the output end of the drainage pipe (8), and the side surface of the drainage pipe (8) is L-shaped.

3. A pressure-resistant seawater filter according to claim 1, characterized in that: Support plates (11) are installed at equal intervals on the bottom of the base frame (1) by means of bolts, and the support plates (11) are configured as stainless steel plates.

4. A pressure-resistant seawater filter according to claim 1, characterized in that: The clamping mechanism (5) comprises a fixing block (51) and a bottom ring (52); the fixing block (51) is fixedly mounted on the lower ends of both sides of the filter outer cylinder (2); the bottom ring (52) is arranged at the bottom of the base frame (1); support plates (53) are fixedly mounted at equal intervals on the top of the bottom ring (52); two groups of support plates (53) arranged at equal intervals are fixedly mounted on the outer sides of concave frames (54); a limiting spring (55) is fixedly mounted on the inner side of the concave frame (54); a limiting plate (56) is fixedly mounted on the inner end of the limiting spring (55); a limiting groove (57) is provided on the outer side of the fixing block (51); and the end of the limiting plate (56) is inserted into the inner side of the limiting groove (57).

5. A pressure-resistant seawater filter according to claim 4, characterized in that: The top of the limiting plate (56) is provided with an inclined surface (58), and the side surface of the limiting plate (56) is in the shape of a right-angled trapezoid.

6. A pressure-resistant seawater filter according to claim 4, characterized in that: A connecting shaft (59) is fixedly mounted on the outer side of the limiting plate (56), and a pull ring is fixedly mounted on the outer end of the connecting shaft (59) which passes through the limiting plate (56).

7. A pressure-resistant seawater filter according to claim 4, characterized in that: The filtering mechanism (6) comprises a filter screen cover (61), the filter screen cover (61) is arranged in a conical shape, the filter screen cover (61) is fixedly mounted on the bottom of the bottom ring (52), the inner side of the filter screen cover (61) is rotatably connected with a rotating shaft (62), the top of the rotating shaft (62) is fixedly mounted with a turbine (63), the upper end of the turbine (63) is plugged into the inner bottom of the filter outer cylinder (2), the bottom of the rotating shaft (62) passes through the filter screen cover (61) and is fixedly mounted with a cleaning brush plate (64) at equal intervals, the inner side of the cleaning brush plate (64) is fitted and connected with the outer surface of the filter screen cover (61).

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