Pressure-resistant seawater filter

Abstract

The invention discloses a pressure-resistant seawater filter. The technical problem that in the prior art, an existing pressure-resistant seawater filter cannot filter narrow strip type impurities is solved. The invention discloses a pressure-resistant seawater filter. The pressure-resistant seawater filter comprises a main body, a filter cartridge and a flexible membrane, an inlet and an outlet are formed in the main body, the filter cartridge is arranged between the inlet and the outlet, and a flexible film is arranged at the joint of the filter cartridge and the main body. According to the pressure-resistant seawater filter disclosed by the invention, non-uniform gaps between the main body and the filter cartridge are completely filled in a manner of filling the flexible membrane between the main body and the filter cartridge, so that the filtering capacity of the filter, especially the filtering capacity for flaky impurities (such as white pollution and fish scales), is greatly improved. Besides, as the pressure difference between the inlet and the outlet of the main body is great, when water flows through the filter cartridge, impact is inevitably formed on the filter cartridge, so that the filter cartridge vibrates, and after the gap between the main body and the filter cartridge is filled with the flexible film, the vibration of the filter cartridge can be weakened or even overcome, so that the noise can be reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of filters, and in particular relates to a pressure-resistant seawater filter. Background Art

[0002] The seawater pipeline can be directly connected to the sea and draw seawater outboard for use. If the larger solid impurities in the seawater are not filtered, it may cause damage to the equipment using seawater, seriously affecting the function, performance and service life of the equipment. Therefore, a seawater filter must be installed to filter the solid impurities in the seawater, and the seawater filter must withstand the pressure of deep water.

[0003] The existing pressure-resistant seawater filter mainly consists of a main body, a filter cartridge, a cover, an air release valve, and a fastener group; the filter is connected to the seawater pipeline through inlet and outlet flanges. Its working principle is to connect the filter to the seawater system and filter solid particle impurities in the system.

[0004] Existing pressure-resistant seawater filters have at least the following problems: the gap between the filter cartridge and the main body is large, and the gap is a narrow strip gap that cannot effectively filter sheet-like impurities; controlling the gap size by improving the structural accuracy is costly and the gap cannot be completely eliminated because of the rigid contact. Summary of the invention

[0005] In order to solve the above technical problems, the present application provides a pressure-resistant seawater filter.

[0006] The technical solution adopted to achieve the purpose of this application is that the present invention discloses a pressure-resistant seawater filter, comprising:

[0007] a main body, the main body comprising an inlet and an outlet in communication;

[0008] A filter cartridge, the filter cartridge comprising a filter element, a top plate and a bottom plate, the filter element being clamped between the inlet and the outlet through the top plate and the bottom plate; and

[0009] A flexible film is provided on the edges of the bottom plate and the top plate.

[0010] Furthermore, the cross section of the filter element is "C"-shaped, the opening of the filter element is arranged toward the inlet, and both sides of the filter element opening are in contact with the inner wall of the main body, and the flexible membrane is respectively arranged on both sides of the opening of the filter element.

[0011] Furthermore, the flexible membrane comprises a first rib, and the first rib is arranged below the flexible membrane so that the cross section of the flexible membrane is L-shaped.

[0012] Furthermore, the flexible membrane also includes a second rib, which is located above the flexible membrane, and the second rib is spaced apart from the first rib to form a mounting groove, the bottom plate is snap-fitted with the mounting groove, the top plate is snap-fitted with the mounting groove, and the filter element is snap-fitted with the flexible membrane.

[0013] Furthermore, the main body is also provided with an installation cavity, the installation cavity is located between the inlet and the outlet, the diameter of the installation cavity is larger than the diameter of the inlet, and the filter cartridge is installed in the installation cavity.

[0014] Further, a diameter of a portion of the outlet close to the installation cavity gradually increases in a direction toward the installation cavity.

[0015] Furthermore, a connecting wall between the outlet and the installation cavity is configured to be arc-shaped, and the connecting wall protrudes toward the installation cavity.

[0016] Furthermore, the main body includes a shell and a cover body, the inlet, the outlet and the installation cavity are all arranged in the shell, the shell is located at the installation cavity, and the cover body is detachably matched with the shell to open or close the installation cavity.

[0017] Furthermore, the housing is provided with at least two circles of sealing grooves for installing sealing rings, and each of the sealing grooves is coaxially arranged with the installation cavity.

[0018] Furthermore, it also includes a spring member, two ends of which are respectively in contact with the top plate and the cover body, and when the cover body is assembled on the shell, the spring member is in a compressed state.

[0019] It can be seen from the above technical scheme that the pressure-resistant seawater filter disclosed in the present application completely fills the uneven gap between the main body and the filter cartridge by filling a flexible membrane between the main body and the filter cartridge, thereby greatly improving the filtering capacity of the filter, especially the filtering capacity for flaky impurities (such as white pollution, fish scales, etc.), with a simple structure, convenient processing and low cost. In addition, due to the large pressure difference between the inlet and outlet of the main body, when water flows through the filter cartridge, it is inevitable to impact the filter cartridge, thereby causing the filter cartridge to vibrate, and the flexible membrane fills the gap between the main body and the filter cartridge to weaken or even overcome the vibration of the filter cartridge, thereby reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of a pressure-resistant seawater filter in an embodiment of the present application;

[0021] Figure 2 This is a cross-sectional schematic diagram of a pressure-resistant seawater filter in an embodiment of the present application;

[0022] Figure 3This is a schematic diagram of a filter cartridge in an embodiment of the present application;

[0023] Figure 4 This is a schematic diagram of the first flexible membrane and the top plate in the embodiment of the present application;

[0024] Figure 5 This is a schematic diagram of the cooperation between the second flexible membrane and the top plate in the embodiment of the present application;

[0025] Figure 6 This is a schematic diagram of the cooperation between the third flexible membrane and the top plate in the embodiment of the present application;

[0026] Figure 7 This is a cross-sectional schematic diagram of the housing in the embodiment of the present application;

[0027] Figure 8 This is a cross-sectional schematic diagram of the cover body in the embodiment of the present application;

[0028] Fig. 9 It is a cross-sectional schematic diagram of another shell in the embodiment of the present application.

[0029] Description of reference numerals:

[0030] 100-main body, 110-shell, 120-cover, 130-inlet, 140-outlet, 150-installation cavity, 160-sealing groove, 170-sealing ring, 180-pressure relief valve, 200-filter cartridge, 210-filter element, 220-top plate, 230-bottom plate, 240-base, 250-spring member, 300-flexible membrane, 310-first baffle, 320-second baffle, 330-installation groove. DETAILED DESCRIPTION

[0031] In order to enable technicians in the technical field to which the present application belongs to understand the present application more clearly, the technical solution of the present application is described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0032] See also Figures 1 to 8 In the embodiment of the present application, the pressure-resistant seawater filter comprises a main body 100, a filter cartridge 200 and a flexible membrane 300. The main body 100 is provided with an inlet 130 and an outlet 140, the filter cartridge 200 is provided between the inlet 130 and the outlet 140, and the flexible membrane 300 is provided at the position where the filter cartridge 200 is connected to the main body 100.

[0033] Through the above embodiments, the present application has the following beneficial effects or advantages: the pressure-resistant seawater filter disclosed in the present application completely fills the uneven gap between the main body 100 and the filter cartridge 200 by filling the flexible membrane 300 between the main body 100 and the filter cartridge 200, greatly improving the filtering capacity of the filter, especially the filtering capacity for flaky impurities (such as white pollution, fish scales, etc.), with a simple structure, convenient processing and low cost. In addition, due to the large pressure difference between the inlet 130 and the outlet 140 of the main body 100, when water flows through the filter cartridge 200, it is inevitable to impact the filter cartridge 200, thereby causing the filter cartridge 200 to vibrate, and the flexible membrane 300 fills the gap between the main body 100 and the filter cartridge 200, which can weaken or even overcome the vibration of the filter cartridge 200, thereby reducing noise.

[0034] Refer to 3. The filter cartridge 200 includes a filter element 210, a top plate 220 and a bottom plate 230, and the top plate 220 and the bottom plate 230 are respectively installed at the upper and lower ends of the filter element 210. The filter element 210 is set to have a "C"-shaped cross section, and the opening of the filter element 210 is set toward the inlet 130, and both sides of the opening of the filter element 210 are in contact with the inner wall of the main body 100, and the above-mentioned flexible membrane 300 is also respectively arranged on both sides of the opening of the filter element 210.

[0035] See also Figure 2 In this embodiment, the flexible membrane 300 can be set in various forms according to the situation. For example, in one embodiment, the points where there are gaps between the filter element 210, the top plate 220, the bottom plate 230 and the main body 100 can be found first, and then the flexible membrane 300 can be set in sections at each point to enhance the sealing between the filter element 210, the top plate 220 or the bottom plate 230 and the main body 100, thereby improving the filtering capacity.

[0036] See also Figure 4 In another embodiment, the flexible membrane 300 can be set to a ring shape, and the ring-shaped flexible membrane 300 is directly used to wrap the outer circumferential surfaces of the bottom plate 230 and the top plate 220. When the filter cartridge 200 is installed, the bottom plate 230 and the top plate 220 are connected to the main body 100 through the flexible membrane 300. By squeezing the flexible membrane 300, the sealing of each circumferential position of the bottom plate 230 and the top plate 220 can be increased at the same time.

[0037] See also Figure 5In another embodiment, a first retaining edge may be provided below the flexible membrane 300 so that the cross section of the flexible membrane 300 is L-shaped. Since the flexible membrane 300 has certain shrinkage and elasticity, during the installation of the filter cartridge 200, the flexible membrane 300 will continue to rub against the inner wall of the main body 100. The L-shaped flexible membrane 300 can effectively prevent the flexible membrane 300 from being separated from the bottom plate 230 or the top plate 220 due to friction.

[0038] See also Figure 6 In another embodiment, a second baffle 320 can be further provided above the flexible membrane 300, and the second baffle is spaced apart from the first baffle. At this time, a mounting groove 330 can be formed between the second baffle 320 and the first baffle, so that the filter element 210, the bottom plate 230 and the top plate 220 are snapped into the mounting groove 330, so that the connection between the flexible membrane 300 and the bottom plate 230 and the top plate 220 can be made more stable, and at the same time, it can also prevent the flexible membrane 300 from being separated from the bottom plate 230 or the top plate 220 due to the friction between the flexible membrane 300 and the main body 100 when the filter cartridge 200 is disassembled.

[0039] See also Figure 2 , Figure 7 and Figure 8 The main body 100 includes a shell 110 and a cover 120. An inlet 130, an outlet 140 and an installation cavity 150 are provided on the shell 110, and the inlet 130 and the outlet 140 are respectively located on both sides of the installation cavity 150. In this embodiment, the inlet 130 and the outlet 140 are arranged on the same straight line, and the height of the installation cavity 150 is greater than the diameter of the inlet 130 and the diameter of the outlet 140, so that the bottom of the installation cavity 150 can extend to the bottom of the inlet 130 and the outlet 140, and the top of the installation cavity 150 extends to the side wall that penetrates the shell 110, so as to facilitate the installation and removal of the filter cartridge 200.

[0040] A bottom plate 230 is provided at the bottom of the filter cartridge 200, and a top plate 220 is provided at the top of the filter cartridge 200. The filter cartridge 200, the bottom plate 230, and the top plate 220 can be put in from the top of the installation cavity 150, the bottom of the filter cartridge 200 falls to the bottom of the installation cavity 150 so that the bottom plate 230 is located below the inlet 130 and the outlet 140, and the top of the filter cartridge 200 is located above the installation cavity 150 so that the top plate 220 is located above the inlet 130 and the outlet 140, so that the filter cartridge 200 can be fixed more stably, and even if the liquid has a large flow rate between the inlet 130 and the outlet 140, the filter cartridge 200 will not be displaced or tilted, thereby ensuring the filtering effect of the filter cartridge 200.

[0041] When the liquid flows through the inlet 130 and the outlet 140, the pressure difference between the inlet 130 and the outlet 140 is large, so the liquid usually flows faster in the housing 110. And because the height of the installation cavity 150 is larger than the diameter of the outlet 140, when the liquid flows from the installation cavity 150 to the outlet 140, the cross-sectional size suddenly changes, causing the flow rate to change rapidly at the sudden change position, making the liquid flow faster. This results in the housing 110 being impacted by the liquid much more at the connection between the installation cavity 150 and the outlet 140 than at other positions, and also causes the housing 110 to be most susceptible to corrosion due to scouring at this position.

[0042] Referring to FIG. 7 , in the present application, the position of the connection between the installation cavity 150 and the outlet 140 is designed to reduce the sudden change speed of the liquid, thereby reducing the damage to the housing 110 .

[0043] Specifically, the existing filters usually set the side wall of the installation cavity 150 perpendicular to the side wall of the outlet 140, which causes a sudden change in the size of the liquid flow cavity, thereby causing greater damage to the filter. The present application improves this position, so that the diameter of the portion of the outlet 140 close to the installation cavity 150 gradually increases in the direction toward the installation cavity 150, so that when the liquid enters the outlet 140 from the installation cavity 150, the size of its flow cavity is gradually reduced. Therefore, the speed will gradually increase rather than suddenly increase in the process of flowing from the installation cavity 150 to the outlet 140, which can form a buffer, thereby achieving the purpose of reducing the damage to the shell 110.

[0044] See also Fig. 9 In one embodiment, the connecting wall between the outlet 140 and the installation cavity 150 may be inclined, and in this case, the end of the outlet 140 facing the installation cavity 150 is in a conical cylindrical shape.

[0045] See also Figure 8 In another embodiment, the connecting wall between the outlet 140 and the mounting cavity 150 may be arranged to be arc-shaped, and the connecting wall protrudes toward the mounting cavity 150. Compared with the inclined connecting wall, the arc-shaped connecting wall is subjected to more uniform force when impacted by liquid, so that the housing 110 has a longer service life.

[0046] The above schemes are implementations in which the diameter of the portion of the outlet 140 close to the installation cavity 150 gradually increases in the direction toward the installation cavity 150. In another embodiment, the height or width of the portion of the installation cavity 150 close to the outlet 140 can also be gradually reduced in the direction toward the outlet 140.

[0047] See also Figure 7 Therefore, when the liquid flows from the installation cavity 150 into the outlet 140, the flow rate changes gradually rather than suddenly.

[0048] In addition, after improving the shape of the shell 110, a layer of anti-erosion and corrosion coating can be sprayed on the inner wall of the shell 110 to make the inner wall of the shell 110 smoother, which can effectively reduce the flow resistance of the flow channel and enhance the strength of the erosion area, thereby improving its corrosion resistance and erosion resistance.

[0049] The cover 120 and the housing 110 can be detachably matched to facilitate opening or closing the installation cavity 150, and a pressure relief valve 180 for adjusting the pressure in the housing 110 is also provided on the cover 120. When the cover 120 is removed from the housing 110, the top of the installation cavity 150 is opened, and the filter cartridge 200 can be installed or removed at this time; when the cover 120 is installed on the housing 110, the installation cavity 150 is closed, and at this time, after the liquid enters the pressure-resistant seawater filter from the inlet 130, it can only be filtered by the filter cartridge 200 and then flow into the outlet 140. Among them, the cover 120 and the housing 110 can be connected by flange or thread.

[0050] When designing the installation cavity 150, the height of the installation cavity 150 is generally made greater than the length of the filter cartridge 200. In order to ensure that the bottom plate 230 of the filter cartridge 200 is just below the inlet 130 and the top plate 220 is just above the inlet 130 after the filter cartridge 200 is installed in the installation cavity 150, a base 240 can be added below the bottom plate 230. When installing the filter cartridge 200, the base 240 is directly in contact with the bottom of the installation cavity 150, so that the liquid entering from the inlet 130 can be completely filtered by the filter cartridge 200 before entering the outlet 140.

[0051] A spring member 250 may be provided between the cover 120 and the top plate 220, and the two ends of the spring member 250 are respectively in contact with the top plate 220 and the cover 120. When the cover 120 is assembled to the housing 110, the spring member 250 is in a compressed state. The filter cartridge 200 is pressed against the spring member 250 to prevent the filter cartridge 200 from shaking or shifting when being flushed by liquid. In addition, the top plate 220 can be more firmly in contact with the bottom plate 230 and the housing 110, thereby ensuring the filtering effect.

[0052] At least two circles of sealing grooves 160 are arranged on the top of the housing 110, and each sealing groove 160 is arranged coaxially with the installation cavity 150, and an O-ring 170 is arranged in each sealing groove 160 for sealing. Since the cover 120 needs to be opened regularly to clean the filter cartridge 200, the seal between the housing 110 and the cover 120 is required to be able to withstand high pressure and be easy to replace. Using two sets of O-rings 170 for sealing can effectively improve the sealing and high pressure resistance, and it is also very convenient to disassemble and assemble.

[0053] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0054] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A pressure-resistant seawater filter, characterized in that: include: a main body, the main body comprising an inlet and an outlet in communication; A filter cartridge, the filter cartridge comprising a filter element, a top plate and a bottom plate, the filter element being clamped between the inlet and the outlet through the top plate and the bottom plate; as well as A flexible film is provided on the edges of the bottom plate and the top plate.

2. The pressure-resistant seawater filter according to claim 1, characterized in that: The cross section of the filter element is "C"-shaped, the opening of the filter element is arranged toward the inlet, and both sides of the filter element opening are in contact with the inner wall of the main body, and the flexible membranes are respectively arranged on both sides of the opening of the filter element.

3. The pressure-resistant seawater filter according to claim 2, characterized in that: The flexible membrane comprises a first rib, and the first rib is arranged below the flexible membrane so that the cross section of the flexible membrane is L-shaped.

4. The pressure-resistant seawater filter according to claim 3, characterized in that: The flexible membrane also includes a second rib, which is located above the flexible membrane. The second rib is spaced apart from the first rib to form a mounting groove. The bottom plate is snap-fitted with the mounting groove, the top plate is snap-fitted with the mounting groove, and the filter element is snap-fitted with the flexible membrane.

5. The pressure-resistant seawater filter according to any one of claims 1 to 4, characterized in that: The main body is further provided with an installation cavity, the installation cavity is located between the inlet and the outlet, the diameter of the installation cavity is larger than the diameter of the inlet, and the filter cartridge is installed in the installation cavity.

6. The pressure-resistant seawater filter according to claim 5, characterized in that: A diameter of a portion of the outlet close to the installation cavity gradually increases in a direction toward the installation cavity.

7. The pressure-resistant seawater filter according to claim 6, characterized in that: A connecting wall between the outlet and the installation cavity is configured in an arc shape, and the connecting wall protrudes toward the installation cavity.

8. The pressure-resistant seawater filter according to claim 5, characterized in that: The main body includes a shell and a cover body, the inlet, the outlet and the installation cavity are all arranged in the shell, the shell is located at the installation cavity, and the cover body is detachably matched with the shell to open or close the installation cavity.

9. The pressure-resistant seawater filter according to claim 8, characterized in that: The housing is provided with at least two circles of sealing grooves for installing sealing rings, and each of the sealing grooves is coaxially arranged with the installation cavity.

10. The pressure-resistant seawater filter according to claim 9, characterized in that: It also includes a spring component, two ends of which are respectively in contact with the top plate and the cover body. When the cover body is assembled on the shell, the spring component is in a compressed state.

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