Blue type filter

Abstract

The invention relates to the technical field of filters, and discloses a blue type filter which comprises a filter body, a top cover is arranged at the top of the filter body, a bottom plate is arranged at the bottom of the filter body, the top cover and the bottom plate are fixedly connected with the filter body through bolts, and a sealing plate is slidably connected into the filter body. A temporary filtering assembly is slidably connected to the upper portion of the sealing plate, an upper end filtering basket frame is movably connected to the lower portion of the sealing plate, and a flexible filtering net is fixedly connected to the bottom of the upper end filtering basket frame. According to the blue type filter, when the upper end filter basket frame, the flexible filter screen and the lower end filter basket frame in the filter main body need to be cleaned and maintained, only the sealing plate needs to be moved downwards until the sealing plate is located below the water inlet of the filter main body, and then the bottom plate can be opened; the upper-end filter basket, the flexible filter screen and the lower-end filter basket are taken down from the filter main body to be cleaned, and the filter main body does not need to be stopped in the whole cleaning process, so that the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of filters, in particular to a blue filter. Background Art

[0002] Basket filter (also known as basket filter) is used in oil or other liquid pipelines to filter debris in the pipeline. The structure of the basket filter is relatively simple. It is mainly composed of a connecting pipe, a cylinder, a filter basket, a flange, a flange cover and fasteners. Among them, the filter basket is the core component of the filter, usually made of metal mesh or stainless steel woven mesh, which can filter out solid particles and impurities in the pipeline.

[0003] As in the prior art, a patent with a patent authorization announcement number of CN216366972U discloses a sealed straight-through basket filter, including a filter body, a liquid inlet pipe is connected to the left side of the filter body, a liquid outlet pipe is connected to the right side of the filter body, a sewage pipe is connected to the front side of the filter body, a fixing plate is fixed to the top of the filter body, a sealing upper cover is arranged on the top of the fixing plate, a number of grooves are provided on the sides of the sealing upper cover and the fixing plate, a flange is fixed to the outer side of the liquid inlet pipe and the liquid outlet pipe, a number of mounting holes are provided on the surface of the flange, and a fixing structure is arranged between the fixing plate and the sealing upper cover; this sealed straight-through basket filter has the advantages of being able to quickly take out the filter basket for cleaning and having better sealing performance during use.

[0004] Although the blue filter in the above patent can quickly remove the filter basket for cleaning, it still has certain defects: At present, when performing regular maintenance work on the basket filter (specifically, the necessary cleaning of the filter basket), the first step is to cut off the fluid supply source connected to the basket filter, then remove the top cover of the filter, and then take out the filter basket for thorough cleaning and drying. After the filter basket is cleaned and dried, it is reinstalled inside the main body of the filter, and finally the top cover is reinstalled before the filter can resume operation. However, a major disadvantage of this maintenance process is that it inevitably requires the equipment to be shut down for a period of time, which brings inconvenience in operation and loss of efficiency. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a blue filter to solve the problems raised by the background art, so that the entire cleaning and maintenance process of the filter body does not require shutdown, thereby improving work efficiency.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a basket filter, comprising a filter body, a top cover is provided on the top of the filter body, a bottom plate is provided on the bottom of the filter body, the top cover and the bottom plate are both connected and fixed to the filter body by bolts, a sealing plate is slidably connected inside the filter body, a temporary filter assembly is slidably connected above the sealing plate, an upper filter basket frame is movably connected below the sealing plate, a flexible filter net is fixedly connected to the bottom of the upper filter basket frame, and a lower filter basket frame is fixedly connected to the bottom of the flexible filter net.

[0007] Further, the temporary filter assembly comprises a lower slider, an upper slider, an upper frame, a lower frame and an elastic filter net, the top of the sealing plate is fixedly connected to a lower mounting block at one end close to the water inlet of the filter body, the upper end of the inner wall of the filter body away from the lower mounting block is fixedly connected to the upper mounting block, the top of the lower mounting block is slidably connected to the lower slider, the upper mounting block is slidably connected to the upper slider on one side close to the lower mounting block, the lower slider is hingedly connected to the lower frame on one side close to the upper slider, the upper slider is hingedly connected to the upper frame on one side close to the lower slider, the upper frame is slidably connected to the lower frame, an elastic filter net is provided between the upper and lower frames, both ends of the elastic filter net are respectively fixedly connected to the upper frame and the lower frame, both ends of the inner sides of the upper frame and the lower frame are provided with mounting grooves, and both sides of the elastic filter net are fixedly connected to elastic mounting strips matching the mounting grooves.

[0008] Furthermore, elastic side strips are fixedly connected to both sides of the outer portion of the upper frame and the lower frame, an upper elastic pad is fixedly connected to one side of the upper slider close to the upper frame, and a lower elastic pad is fixedly connected to one side of the lower slider close to the lower frame.

[0009] Furthermore, a positioning groove is provided in the middle position of the sealing plate, a positioning plate is rotatably connected to the middle position of the positioning groove, a push rod is fixedly connected to the middle position of the positioning plate, a rotating plate is sleeved on the upper end of the push rod, the rotating plate is rotatably connected to the top cover, a rotating groove is provided at the upper end of the sealing plate, a rotating ring is rotatably connected to the inside of the rotating groove, a splint is fixedly connected to the inner wall of the rotating ring, the sealing plate and the splint are provided with staggered water-permeable grooves, and a pushing plate slidably connected to the positioning plate is fixedly connected to the top of the splint.

[0010] Furthermore, a positioning sleeve is fixedly connected to the middle position of the elastic filter screen, a rotating block is rotatably connected inside the positioning sleeve, and the push rod and the push plate are both slidably connected to the rotating block.

[0011] Furthermore, an outer sleeve is fixedly connected to the top of the top cover, and two fixing bolts are threadedly connected to the middle position of the outer sleeve, wherein the end of one of the fixing bolts abuts against the push plate, and the two fixing bolts are perpendicular to each other.

[0012] Furthermore, water-permeable filters are fixedly connected inside the water-permeable grooves on the sealing plate and the clamping plate, and a sealing gasket is provided between the sealing plate and the clamping plate, and the sealing gasket is fixedly connected to the top of the sealing plate.

[0013] Furthermore, the lower end of the push rod passes through the sealing plate and is fixedly connected to a hook block, the inner wall of the upper filter basket frame is fixedly connected to a connecting block, the connecting block is provided with a hook groove matching the hook block, the bottom of the lower filter basket frame is fixedly connected to a positioning frame, the top of the bottom plate is fixedly connected to a positioning block, and the positioning block matches the positioning frame.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. For this type of blue filter, when the filter body is working normally, the upper filter basket frame will be at the upper end inside the filter body, and the flexible filter net will be in a straightened state. When the upper filter basket frame, the flexible filter net and the lower filter basket frame in the filter body need to be cleaned and maintained, you only need to move the sealing plate down until the sealing plate is below the water inlet of the filter body, then open the bottom plate, and remove the upper filter basket frame, the flexible filter net and the lower filter basket frame from the filter body for cleaning. The entire cleaning process does not require the filter body to be shut down, thereby improving work efficiency.

[0015] 2. For this type of blue filter, before the sealing plate moves down, the clamping plate can be rotated by pushing the plate to align the water-permeable groove on the clamping plate with the water-permeable groove on the sealing plate, so that the fluid under the sealing plate can enter the top of the sealing plate, avoiding the fluid under the sealing plate being compressed when the sealing plate moves down, making it difficult to move the sealing plate down, making it easier and more convenient to move the sealing plate down.

[0016] 3. In this type of blue filter, the upper and lower ends of the temporary filter assembly are slidably connected to the upper mounting block and the lower mounting block through an upper slider and a lower slider, respectively, making it easier to install the temporary filter assembly and convenient for disassembly, cleaning and maintenance of the temporary filter assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 A partial cross-sectional view of the present invention as a whole; Figure 3 For the present invention Figure 2 A schematic diagram of the local enlarged structure at point A in the middle; Figure 4 It is a schematic diagram of the structure of the present invention when it is fully unfolded; Figure 5 It is a schematic diagram of the structure of the sealing plate and the clamping plate of the present invention when they are unfolded; Figure 6 It is a schematic diagram of the connection structure of the upper filter basket frame, the flexible filter screen and the lower filter basket frame of the present invention; Figure 7 This is a schematic structural diagram of the filter basket frame at the lower end of the present invention when viewed from above; Figure 8 It is a schematic diagram of the connection structure of the upper frame, the lower frame and the elastic filter screen of the present invention; Fig. 9 For the present invention Figure 8 A schematic diagram of the local enlarged structure at B in the middle; Fig.10 It is a schematic diagram of the structure of the upper frame, the lower frame and the elastic filter net when they are unfolded; Fig.11 For the present invention Fig.10 Schematic diagram of the local enlarged structure at point C in the middle.

[0018] In the figure: 1, filter body; 2, top cover; 3, bottom plate; 4, sealing plate; 5, positioning groove; 6, positioning plate; 7, push rod; 8, sealing gasket; 9, clamping plate; 10, rotating ring; 11, rotating groove; 12, pushing plate; 13, rotating plate; 14, outer sleeve; 15, fixing bolt; 16, lower mounting block; 17, upper mounting block; 18, lower slider; 19, upper slider; 20, upper elastic pad; 21, lower elastic pad; 22, upper frame; 23, lower frame; 24, mounting groove; 25, elastic filter screen; 26, elastic mounting strip; 27, elastic side strip; 28, positioning sleeve; 29, rotating block; 30, hook block; 31, upper filter basket frame; 32, connecting block; 33, flexible filter screen; 34, lower filter basket frame; 35, positioning frame; 36, positioning block; 37, permeable filter screen. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] See also Figures 1 to 11 A blue filter comprises a filter body 1, a top cover 2 is provided on the top of the filter body 1, a bottom plate 3 is provided on the bottom of the filter body 1, the top cover 2 and the bottom plate 3 are both connected and fixed to the filter body 1 by bolts, a sealing plate 4 is slidably connected inside the filter body 1, a temporary filter assembly is slidably connected above the sealing plate 4, an upper filter basket frame 31 is movably connected below the sealing plate 4, a flexible filter net 33 is fixedly connected to the bottom of the upper filter basket frame 31, and a lower filter basket frame 34 is fixedly connected to the bottom of the flexible filter net 33.

[0021] In the basket filter of the present invention, when the filter body 1 is working normally, the upper filter basket frame 31 is at the upper end inside the filter body 1, and the flexible filter screen 33 is in a straightened state. When the upper filter basket frame 31, the flexible filter screen 33 and the lower filter basket frame 34 in the filter body 1 need to be cleaned and maintained, it is only necessary to move the sealing plate 4 downward, and the sealing plate 4 will drive the upper filter basket frame 31 to move downward, and pull down and unfold the temporary filter assembly until the sealing plate 4 is below the water inlet of the filter body 1, and the flexible filter screen 33 is in a folded state. Then the bottom plate 3 can be opened, and the upper filter basket frame 31, the flexible filter screen 33 and the lower filter basket frame 34 can be removed from the filter body 1 for cleaning. After the cleaning is completed, the upper filter basket frame 31, the flexible filter screen 33 and the lower filter basket frame 34 are installed back into the filter. The sealing plate 4 is moved inside the main body 1 again to move the sealing plate 4 upward. The sealing plate 4 will drive the upper filter basket frame 31 to move upward synchronously until the sealing plate 4 is above the water inlet of the filter main body 1. During this process, the temporary filter assembly will also be pushed upward by the sealing plate 4, so as to be folded and stored back to the original position. When the sealing plate 4 is above the water inlet of the filter main body 1, the flexible filter net 33 will be stretched and unfolded, so that the upper filter basket frame 31, the flexible filter net 33 and the lower filter basket frame 34 form a filter basket, thereby playing a filtering role. The above-mentioned cleaning process does not require the filter main body 1 to be shut down, so the working efficiency of the filter main body 1 is higher. In addition, the filter main body 1 is arranged in a square shape, so that the temporary filter assembly is easier to fit with the inner wall of the filter main body 1 when folded and unfolded, thereby ensuring a certain sealing effect.

[0022] As a preferred technical solution of the present invention, the temporary filtering assembly includes a lower slider 18, an upper slider 19, an upper frame 22, a lower frame 23 and an elastic filter screen 25, the top of the sealing plate 4 is fixedly connected to the lower mounting block 16 at one end close to the water inlet of the filter body 1, the upper end of the inner wall of the filter body 1 away from the lower mounting block 16 is fixedly connected to the upper mounting block 17, the top of the lower mounting block 16 is slidably connected to the lower slider 18, the upper mounting block 17 is slidably connected to the side of the lower mounting block 16, and the lower slider 1 A lower frame 23 is hingedly connected to one side of the upper slider 19, an upper frame 22 is hingedly connected to one side of the upper slider 19 near the lower slider 18, the upper frame 22 is slidably connected to the lower frame 23, an elastic filter screen 25 is provided between the upper frame 22 and the lower frame 23, both ends of the elastic filter screen 25 are fixedly connected to the upper frame 22 and the lower frame 23 respectively, mounting grooves 24 are provided at both ends of the inner sides of the upper frame 22 and the lower frame 23, and elastic mounting strips 26 matching the mounting grooves 24 are fixedly connected to both sides of the elastic filter screen 25.

[0023] Specifically, when the sealing plate 4 moves downward, the sealing plate 4 will pull the lower slider 18 downward together through the lower mounting block 16, and the lower slider 18 will pull the lower frame 23 downward, and the lower frame 23 will pull the elastic filter 25 to unfold, so that the temporary filter assembly can be unfolded to play a temporary filtering role, and when the sealing plate 4 moves upward, the sealing plate 4 will push the lower slider 18 and the lower mounting block 16 upward, and the lower mounting block 16 will push the lower frame 23 upward, so that the upper frame 22 is inserted into the lower frame 23. The two ends of the mounting groove 24 are fixedly connected to the upper frame 22 and the lower frame 23 respectively. Therefore, when the upper frame 22 and the lower frame 23 are close to each other, the elastic filter 25 will be folded up and returned to the original position. Since the space in the mounting groove 24 is larger than the volume of the elastic mounting strip 26, and the elastic mounting strips 26 fixedly connected to the two sides of the elastic filter 25 will also be folded along with the folding of the elastic filter 25, it can be ensured that the two sides of the elastic filter 25 can always be in close contact with the upper frame 22 and the lower frame 23 to avoid a large gap.

[0024] As a preferred technical solution of the present invention, elastic side strips 27 are fixedly connected to both sides of the outer portion of the upper frame 22 and the lower frame 23, an upper elastic pad 20 is fixedly connected to the side of the upper slider 19 close to the upper frame 22, and a lower elastic pad 21 is fixedly connected to the side of the lower slider 18 close to the lower frame 23.

[0025] Specifically, the elastic side strip 27 can block the gap between the upper frame 22, the lower frame 23 and the filter body 1, the upper elastic pad 20 blocks the gap between the upper slider 19 and the upper frame 22, and the lower elastic pad 21 blocks the gap between the lower slider 18 and the lower frame 23, so as to prevent unfiltered fluid from passing over the elastic filter net 25.

[0026] As a preferred technical solution of the present invention, a positioning groove 5 is provided in the middle position of the sealing plate 4, a positioning plate 6 is rotatably connected to the middle position of the positioning groove 5, a push rod 7 is fixedly connected to the middle position of the positioning plate 6, a rotating plate 13 is sleeved on the upper end of the push rod 7, the rotating plate 13 is rotatably connected to the top cover 2, a rotating groove 11 is provided at the upper end of the sealing plate 4, a rotating ring 10 is rotatably connected to the inside of the rotating groove 11, a splint 9 is fixedly connected to the inner wall of the rotating ring 10, the sealing plate 4 and the splint 9 are provided with staggered water-permeable grooves, and a push plate 12 slidably connected to the positioning plate 6 is fixedly connected to the top of the splint 9.

[0027] Specifically, before the sealing plate 4 moves down or up, in order to prevent the fluid below or above the sealing plate 4 from being compressed by the sealing plate 4, which makes it difficult for the sealing plate 4 to move down or up, the clamping plate 9 can be rotated by the pushing plate 12 to align the water-permeable grooves on the clamping plate 9 with the water-permeable grooves on the sealing plate 4, and then the sealing plate 4 is moved down or up. After the sealing plate 4 moves to the specified position, the clamping plate 9 is rotated by the pushing plate 12 again to stagger the water-permeable grooves on the clamping plate 9 with the water-permeable grooves on the sealing plate 4, so that the sealing plate 4 forms a sealing effect and prevents the fluid from passing through the sealing plate 4. In this way, when the maintenance personnel open the top cover 2 or the bottom plate 3 of the filter body 1, there will be no fluid leakage.

[0028] As a preferred technical solution of the present invention, a positioning sleeve 28 is fixedly connected to the middle position of the elastic filter 25, and a rotating block 29 is rotatably connected inside the positioning sleeve 28. The push rod 7 and the push plate 12 are both slidably connected to the rotating block 29.

[0029] Specifically, the push rod 7 and the push plate 12 are separated from the elastic filter 25 by the rotating block 29 and the positioning sleeve 28 to prevent the push rod 7 and the push plate 12 from rubbing against the elastic filter 25 when moving, thereby preventing the elastic filter 25 from being damaged.

[0030] As a preferred technical solution of the present invention, an outer sleeve 14 is fixedly connected to the top of the top cover 2, and two fixing bolts 15 are threadedly connected to the middle position of the outer sleeve 14, wherein the end of one of the fixing bolts 15 is against the push plate 12, and the two fixing bolts 15 are perpendicular to each other.

[0031] Specifically, when the sealing plate 4 moves to above the water inlet of the filter body 1, the fixing bolt 15 can be tightened at this time, and the pushing plate 12 and the push rod 7 can be fixed by the fixing bolt 15, so as to prevent the sealing plate 4 from moving downward by itself. When the sealing plate 4 moves to below the water inlet of the filter body 1, the pushing plate 12 will be rotated to make the water-permeable groove on the clamping plate 9 misaligned with the water-permeable groove on the sealing plate 4. After the rotation of the pushing plate 12 is completed, the other fixing bolt 15 can be rotated to make the other fixing bolt 15 abut against the pushing plate 12, so as to fix the pushing plate 12 and prevent the pushing plate 12 from rotating by itself.

[0032] As a preferred technical solution of the present invention, a water-permeable filter 37 is fixedly connected inside the water-permeable grooves on the sealing plate 4 and the clamping plate 9, and a sealing gasket 8 is provided between the sealing plate 4 and the clamping plate 9, and the sealing gasket 8 is fixedly connected to the top of the sealing plate 4.

[0033] Specifically, the gap between the sealing plate 4 and the clamping plate 9 is sealed by the sealing gasket 8, and the fluid is filtered by the water-permeable filter 37 to prevent impurities from passing through the water-permeable grooves on the sealing plate 4 and the clamping plate 9 and entering the water outlet of the filter body 1 when the sealing plate 4 is in the middle position of the water inlet of the filter body 1.

[0034] As a preferred technical solution of the present invention, the lower end of the push rod 7 passes through the sealing plate 4 and is fixedly connected to a hook block 30, the inner wall of the upper filter basket frame 31 is fixedly connected to a connecting block 32, and the connecting block 32 is provided with a hook groove matching the hook block 30, the bottom of the lower filter basket frame 34 is fixedly connected to a positioning frame 35, and the top of the bottom plate 3 is fixedly connected to a positioning block 36, and the positioning block 36 matches the positioning frame 35.

[0035] Specifically, after the upper filter basket frame 31 is placed into the filter body 1 from the bottom of the filter body 1, the hook block 30 will directly pass through the hook groove, and then the bottom plate 3 will be installed. Before installing the bottom plate 3, the positioning block 36 at the top of the bottom plate 3 can be inserted into the positioning frame 35, and then the bottom plate 3 is fixed by bolts, and then the push rod 7 is rotated to drive the hook block 30 to rotate through the push rod 7, so that the hook block 30 and the hook groove are staggered, and then the push plate 12 can be rotated to align the water-permeable groove on the clamping plate 9 with the water-permeable groove on the sealing plate 4, and the sealing plate 4 is pulled upward by the push rod 7. When the sealing plate 4 moves up, the hook block 30 at the bottom of the push rod 7 will pull the connecting block 32 upward, and the connecting block 32 will drive the upper filter basket frame 31 to move up. Since the positioning block 36 has been inserted into the positioning frame 35, the lower filter basket frame 34 is pulled by the positioning frame 35 and cannot move, so the flexible filter net 33 will unfold, thereby expanding the contact area between the filter basket and the fluid to enhance the filtering effect.

[0036] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A blue filter, comprising a filter body (1), characterized in that: A top cover (2) is provided on the top of the filter body (1), and a bottom plate (3) is provided on the bottom of the filter body (1); the top cover (2) and the bottom plate (3) are both connected and fixed to the filter body (1) by bolts; a sealing plate (4) is slidably connected inside the filter body (1); a temporary filter assembly is slidably connected above the sealing plate (4); an upper filter basket frame (31) is movably connected below the sealing plate (4); a flexible filter screen (33) is fixedly connected to the bottom of the upper filter basket frame (31); and a lower filter basket frame (34) is fixedly connected to the bottom of the flexible filter screen (33).

2. A blue filter according to claim 1, characterized in that: The temporary filtering assembly comprises a lower slider (18), an upper slider (19), an upper frame (22), a lower frame (23) and an elastic filtering net (25); the top of the sealing plate (4) is fixedly connected to a lower mounting block (16) at one end close to the water inlet of the filter body (1); the upper end of the inner wall of the filter body (1) away from the lower mounting block (16) is fixedly connected to an upper mounting block (17); the top of the lower mounting block (16) is slidably connected to the lower slider (18); the side of the upper mounting block (17) close to the lower mounting block (16) is slidably connected to the upper slider (19); the lower slider (18) close to the upper slider (19) is fixedly connected to the upper end of the inner wall of the filter body (1) away from the lower mounting block (16); ) is hingedly connected to a lower frame (23) on one side of the upper slider (19), and an upper frame (22) is hingedly connected to a side of the upper slider (19) close to the lower slider (18). The upper frame (22) is slidably connected to the lower frame (23). An elastic filter net (25) is provided between the upper frame (22) and the lower frame (23). Two ends of the elastic filter net (25) are respectively fixedly connected to the upper frame (22) and the lower frame (23). Both ends of the inner sides of the upper frame (22) and the lower frame (23) are provided with mounting grooves (24). Both sides of the elastic filter net (25) are fixedly connected with elastic mounting strips (26) matching the mounting grooves (24).

3. A blue filter according to claim 2, characterized in that: Both sides of the outer portions of the upper frame (22) and the lower frame (23) are fixedly connected with elastic side strips (27); a side of the upper slider (19) close to the upper frame (22) is fixedly connected with an upper elastic pad (20); and a side of the lower slider (18) close to the lower frame (23) is fixedly connected with a lower elastic pad (21).

4. A blue filter according to claim 2, characterized in that: A positioning groove (5) is provided in the middle of the sealing plate (4), a positioning plate (6) is rotatably connected to the middle of the positioning groove (5), a push rod (7) is fixedly connected to the middle of the positioning plate (6), a rotating plate (13) is sleeved on the upper end of the push rod (7), the rotating plate (13) is rotatably connected to the top cover (2), a rotating groove (11) is provided at the upper end of the sealing plate (4), a rotating ring (10) is rotatably connected inside the rotating groove (11), a clamping plate (9) is fixedly connected to the inner wall of the rotating ring (10), the sealing plate (4) and the clamping plate (9) are both provided with staggered water-permeable grooves, and a pushing plate (12) slidably connected to the positioning plate (6) is fixedly connected to the top of the clamping plate (9).

5. A blue filter according to claim 4, characterized in that: A positioning sleeve (28) is fixedly connected to the middle position of the elastic filter screen (25), a rotating block (29) is rotatably connected inside the positioning sleeve (28), and the push rod (7) and the push plate (12) are both slidably connected to the rotating block (29).

6. A blue filter according to claim 4, characterized in that: An outer sleeve (14) is fixedly connected to the top of the top cover (2), and two fixing bolts (15) are threadedly connected to the middle position of the outer sleeve (14), wherein the end of one of the fixing bolts (15) abuts against the push plate (12), and the two fixing bolts (15) are perpendicular to each other.

7. A blue filter according to claim 4, characterized in that: A water-permeable filter screen (37) is fixedly connected inside the water-permeable grooves on the sealing plate (4) and the clamping plate (9), and a sealing gasket (8) is provided between the sealing plate (4) and the clamping plate (9), and the sealing gasket (8) is fixedly connected to the top of the sealing plate (4).

8. A blue filter according to claim 4, characterized in that: The lower end of the push rod (7) passes through the sealing plate (4) and is fixedly connected to a hook block (30); the inner wall of the upper filter basket frame (31) is fixedly connected to a connecting block (32); the connecting block (32) is provided with a hook groove matching the hook block (30); the bottom of the lower filter basket frame (34) is fixedly connected to a positioning frame (35); the top of the bottom plate (3) is fixedly connected to a positioning block (36); the positioning block (36) matches the positioning frame (35).

Images