Mechanical closing device for underwater valve of filter tank

Abstract

The invention relates to the technical field of wastewater treatment, in particular to a mechanical closing device for an underwater valve of a filter tank, which comprises a filter component, a first filter plate and a handrail, the filter component comprises a filter tank, a sewage inlet pipe, a backwashing water inlet pipe and a purified water outlet pipe which are communicated with the filter tank, the first filter plate is arranged on the inner side of the filter tank, and the handrail is arranged on the filter tank; the temporary sewage discharge part comprises an overflow pipe arranged on the first filter plate, an opening and closing assembly arranged on the overflow pipe and a power assembly connected with the opening and closing assembly; the anti-blocking part comprises a second filter plate connected with the inner wall of the overflow pipe, a cleaning assembly arranged in the overflow pipe and a vibration assembly arranged on the second filter plate, suspended solids in the sewage are intercepted through the filter part, and the sewage can be conveniently subjected to next process treatment; the first filter plate is gradually blocked as time goes on, and sewage is discharged through the temporary sewage discharge part as the water level in the filter tank is increased.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, and in particular to a mechanical closing device for an underwater valve in a filter tank. Background Art

[0002] Industrial wastewater usually contains a variety of harmful substances, such as heavy metals, organic matter, suspended solids, etc., so it needs to undergo multiple process treatments. The existing filtration process works well in the early stages, but as time goes by, the mesh of the filter is clogged by the biofilm formed by suspended solids and microorganisms, causing the filtration effect to gradually decrease, affecting the efficiency of wastewater passage, and ultimately leading to filter pool blockage, wastewater overflow, and affecting production safety. Summary of the invention

[0003] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0004] In view of the problem that the above-mentioned wastewater is easily clogged during the filtration process, which affects the passage of the wastewater, the present invention is proposed.

[0005] Therefore, an object of the present invention is to provide a mechanical closing device for underwater valves in a filter tank.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a mechanical closing device for underwater valves in a filter tank, comprising: a filter component, including a filter tank, a sewage inlet pipe connected to the filter tank, a backwash inlet pipe, a purified water outlet pipe, a first filter plate arranged inside the filter tank, and a handrail arranged on the filter tank;

[0007] A temporary sewage discharge component, comprising an overflow pipe arranged on the first filter plate, an opening and closing assembly arranged on the overflow pipe, and a power assembly connected to the opening and closing assembly; and,

[0008] The anti-blocking component includes a second filter plate connected to the inner wall of the overflow pipe, a cleaning component arranged in the overflow pipe, and a vibration component arranged on the second filter plate.

[0009] As a preferred solution of the mechanical closing device for underwater valves in the filter tank of the present invention, the overflow pipe includes a vertical pipe arranged on the filter plate, a horizontal pipe connected to the vertical pipe, and a water inlet connected to the horizontal pipe.

[0010] As a preferred solution of the mechanical closing device for the underwater valve of the filter tank described in the present invention, the opening and closing assembly includes a retaining ring arranged on the inner wall of the horizontal tube, a moving block slidably connected to the inner wall of the horizontal tube, and a sealing gasket sleeved on the moving block.

[0011] As a preferred solution of the mechanical closing device of the underwater valve of the filter tank described in the present invention, the power assembly includes a push-pull rod connected to the moving block and passing through the horizontal pipe, a toggle rod connected to the push-pull rod, a swing arm connected to the toggle rod, a synchronization rod connected to the swing arm, a disc connected to the synchronization rod, a swing rod connected to the disc, and a float connected to the swing rod.

[0012] As a preferred solution of the mechanical closing device for the underwater valve of the filter tank described in the present invention, the synchronization rod is rotatably connected to a mounting seat, the mounting seat is connected to the cross pipe, a U-shaped groove is provided at the upper end of the swing arm, the toggle rod is located in the U-shaped groove, and baffles are provided at both ends of the toggle rod.

[0013] As a preferred solution of the mechanical closing device for underwater valves in the filter tank of the present invention, the cleaning component includes a rotating scraper arranged on the second filter plate and a spiral tube arranged in the vertical pipe.

[0014] As a preferred solution of the mechanical closing device for underwater valve of the filter tank described in the present invention, the inner wall of the spiral tube is provided with rifling, and the tail end of the spiral tube is provided with a reduced diameter section and an expanded diameter section in sequence.

[0015] As a preferred solution of the mechanical closing device for underwater valves in the filter tank of the present invention, the expanded diameter section faces the rotating scraper, and the top end of the spiral tube extends out of the vertical pipe and is located in the filter tank.

[0016] As a preferred solution of the mechanical closing device for underwater valves in the filter tank described in the present invention, the vibration assembly includes a tension spring connected to the inner wall of the vertical pipe, a toggle plate connected to the tension spring, and a pull rope connected to the toggle plate.

[0017] As a preferred solution of the mechanical closing device for the underwater valve of the filter tank described in the present invention, the vibration assembly also includes a guide wheel arranged on the second filter plate and the vertical pipe, the pull rope is connected to the swing rod after passing through the guide wheel, and a plurality of protrusions are arranged on one end of the toggle plate close to the second filter plate.

[0018] The beneficial effects of the present invention are as follows: the present invention intercepts suspended matter in sewage through the filtering component, which is convenient for the next process treatment of the sewage. The first filter plate is gradually blocked over time. As the water level in the filter tank increases, the sewage is discharged through the temporary sewage discharge component to avoid sewage overflow and ensure production safety. When the sewage is discharged through the temporary sewage discharge component, the anti-blocking component intercepts the suspended matter in the sewage to avoid clogging of the second filter plate and ensure the normal temporary sewage discharge. After the sewage discharge is completed, the staff can deal with the suspended matter on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0020] Figure 1 The figure is an overall schematic diagram of a mechanical closing device for an underwater valve in a filter tank.

[0021] Figure 2 The present invention is a schematic diagram of temporary sewage discharge components and anti-blocking components of a mechanical closing device for an underwater valve in a filter tank.

[0022] Figure 3 for Figure 2 Front cross-sectional view of .

[0023] Figure 4 for Figure 3 Enlarged view of point A in .

[0024] Figure 5 The present invention is a schematic diagram of a power assembly of a mechanical closing device for an underwater valve in a filter tank.

[0025] Figure 6 The present invention is a schematic diagram of a cleaning component and a vibration component of a mechanical closing device for an underwater valve in a filter tank. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0029] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0030] Example 1

[0031] Reference Figure 1 , which is the first embodiment of the present invention, and provides a mechanical closing device for underwater valves in a filter tank, including a filter component 100, including a filter tank 101, wherein the filter tank 101 is used to accommodate discharged sewage, a sewage inlet pipe 102 connected to the filter tank 101, wherein sewage is discharged into the filter tank 101 through the sewage inlet pipe 102, a backwash inlet pipe 103, wherein the backwash inlet pipe 103 is used to send clean water into the filter tank 101, and the clean water backwashes the first filter plate 105, thereby cleaning the suspended matter intercepted by the first filter plate 105, and a purified water outlet pipe 104, wherein the water filtered by the first filter plate 105 is discharged through the purified water outlet The sewage inlet pipe 102, the backwash inlet pipe 103 and the purified water outlet pipe 104 are all provided with valves, and a first filter plate 105 is arranged inside the filter tank 101, wherein the sewage inlet pipe 102 is located above the first filter plate 105, and the backwash inlet pipe 103 and the purified water outlet pipe 104 are located below the first filter plate 105. The first filter plate 105 is used to intercept suspended matter in the sewage. A handrail 106 is arranged on the filter tank 101. The staff climbs onto the filter tank 101 through the handrail 106, which is convenient for salvaging suspended matter, cleaning the filter tank 101, the first filter plate 105 and the second filter plate 301;

[0032] Reference Figure 2, a temporary sewage discharge component 200, when the first filter plate 105 is blocked, the sewage level in the filter tank 101 gradually increases, in order to avoid sewage overflow, the sewage is discharged through the temporary sewage discharge component 200, including an overflow pipe 201 arranged on the first filter plate 105, wherein the blocked sewage is discharged to the bottom of the first filter plate 105 through the overflow pipe 201, an opening and closing component 202 arranged on the overflow pipe 201, wherein when the opening and closing component 202 is opened, the sewage is discharged through the overflow pipe 201, and a power component 203 connected to the opening and closing component 202, wherein the power component 203 can operate the opening and closing component 202 according to the sewage water level;

[0033] Reference Figure 3 The anti-blocking component 300 includes a second filter plate 301 connected to the inner wall of the overflow pipe 201, wherein the second filter plate 301 is used to intercept suspended matter, and the second filter plate 301 is tilted, and the suspended matter will gather at the lower part of the second filter plate 301, thereby intercepting more suspended matter, and a cleaning component 302 is arranged in the overflow pipe 201, wherein the cleaning component 302 is used to prevent the second filter plate 301 from being blocked, and a vibration component 303 is arranged on the second filter plate 301, wherein the vibration component 303 makes the second filter plate 301 vibrate, thereby further shaking the suspended matter to the lower part of the second filter plate 301.

[0034] Operation process: The sewage inlet pipe 102 discharges sewage into the filter tank 101, and the first filter plate 105 intercepts the suspended matter in the sewage. The filtered water is discharged through the purified water outlet pipe 104 and enters the next treatment process. As the use time goes by, the first filter plate 105 is gradually blocked by the suspended matter, affecting the passage of sewage. The water level in the filter tank 101 gradually increases, and the increased water level drives the power component 203 to work. The power component 203 drives the opening and closing component 202 to work with the water level, so that the horizontal pipe 201b of the overflow pipe 201 is opened, and the sewage is discharged through the overflow pipe 201. During the operation of the power component 203 The vibration component 303 will be driven to work, and the vibration component 303 will make the second filter plate 301 vibrate, so that the suspended matter will be shaken to the lower part of the second filter plate 301, so that the second filter plate 301 can intercept more suspended matter. During the sewage discharge of the overflow pipe 201, the cleaning component 302 is driven by the sewage to clean the second filter plate 301. After the sewage is treated, the cleaning water is sent into the filter tank 101 through the backwash inlet pipe 103. The cleaning water backwashes the first filter plate 105, so that the suspended matter is separated from the first filter plate 105. The staff climbs up the filter tank 101 through the handrail 106 to clean the suspended matter.

[0035] Example 2

[0036] Reference Figure 2, which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that the overflow pipe 201 includes a vertical pipe 201a arranged on the filter plate, wherein the vertical pipe 201a is vertically arranged to pass through, and a horizontal pipe 201b is connected to the side wall of the vertical pipe 201a, wherein the opening and closing component 202 is arranged in the horizontal pipe 201b, the size of the vertical pipe 201a is larger than that of the horizontal pipe 201b, and the water inlet 201c connected to the horizontal pipe 201b moves in the horizontal pipe 201b through the opening and closing component 202, thereby controlling whether the sewage can enter the horizontal pipe 201b from the water inlet 201c.

[0037] Reference Figure 4 Specifically, the opening and closing component 202 includes a retaining ring 202a arranged on the inner wall of the horizontal tube 201b, and a moving block 202b slidably connected to the inner wall of the horizontal tube 201b. The moving block 202b is driven to move by the power component 203, thereby controlling the opening and closing of the connection between the water inlet 201c and the horizontal tube 201b, and a sealing gasket 202c is sleeved on the moving block 202b. When the moving block 202b blocks the connection between the water inlet 201c and the horizontal tube 201b, the sealing gasket 202c fits with the retaining ring 202a.

[0038] Reference Figure 3-Figure 5 Furthermore, the power assembly 203 includes a push-pull rod 203a connected to the moving block 202b and passing through the transverse tube 201b, through which the moving block 202b can be moved in the transverse tube 201b, a toggle rod 203b connected to the push-pull rod 203a, and a swing arm 203c connected to the toggle rod 203b. When the swing arm 203c rotates, it drives the toggle rod 203b to move, thereby causing the push-pull rod 203a to move along the transverse tube 201b, and the swing arm 203c is connected to the toggle rod 203b. The arm 203c is connected to a synchronization rod 203d, a disc 203e is connected to the synchronization rod 203d, and a swing rod 203f is connected to the disc 203e. When the height of the float 203g changes, the disc 203e is driven to rotate through the swing rod 203f, and then the swing arm 203c is driven to rotate through the synchronization rod 203d. The float 203g is connected to the swing rod 203f. The float 203g is suspended on the water surface. When the water level changes, the height of the float 203g changes synchronously.

[0039] Reference Figure 5 Furthermore, the synchronization rod 203d is rotatably connected to a mounting seat 203h, and the mounting seat 203h is connected to the cross tube 201b. The synchronization rod 203d is installed on the cross tube 201b through the mounting seat 203h to ensure the stability of the rotation of the synchronization rod 203d. A U-shaped groove is opened at the upper end of the swing arm 203c, and the toggle rod 203b is located in the U-shaped groove. Blocking pieces are provided at both ends of the toggle rod 203b.

[0040] The rest of the structure is the same as that of Example 1.

[0041] Operation process: As time goes by, the first filter plate 105 is gradually blocked by suspended matter, which causes the sewage water level to gradually increase. The sewage water level will also drive the float 203g to rise. When the height of the float 203g changes, it will drive the disc 203e to rotate through the swing rod 203f, and then drive the swing arm 203c to rotate through the synchronization rod 203d. At this time, the swing arm 203c rotates clockwise until it turns from being in contact with the baffle on one side to being in contact with the baffle on the other side. At this stage, the water level is at the first warning water level, indicating that the first filter plate 105 has been blocked and the opening and closing component 202 is not opened;

[0042] When the swing arm 203c is in contact with the baffle on the other side, if the water level still rises, the swing arm 203c will drive the toggle rod 203b to move, and the toggle rod 203b will move with the moving block 202b in the horizontal pipe 201b, so that the connection between the water inlet 201c and the horizontal pipe 201b is opened, and the sewage enters the horizontal pipe 201b from the water inlet 201c, and then flows to the bottom of the first filter plate 105 through the vertical pipe 201a, and finally discharged through the purified water outlet pipe 104. At this stage, the water level is at the second warning water level, indicating that the first filter plate 105 has been blocked and the sewage can be filtered through the second filter plate 301;

[0043] If the water level continues to rise, it means that the second filter plate 301 is blocked. The sewage flows in through the water inlet 201c and also flows in through the top side of the vertical pipe 201a. At this time, the sewage will cause the cleaning component 302 to work to clean the suspended matter on the second filter plate 301. This stage is at the third warning water level. The staff needs to pay attention to the water level of the sewage to avoid overflow due to the suspended matter in the sewage exceeding the cleaning capacity of the cleaning component 302.

[0044] Example 3

[0045] Reference Figure 3 and Figure 6 , which is the third embodiment of the present invention. This embodiment is different from the above embodiments in that the cleaning component 302 includes a rotating scraper 302a arranged on the second filter plate 301. The rotating scraper 302a will rotate when impacted by sewage, thereby scraping off the suspended matter on the second filter plate 301. The spiral tube 302b is arranged in the vertical pipe 201a. Sewage flows in from the upper end of the spiral tube 302b, flows out from the lower end of the spiral tube 302b and impacts the rotating scraper 302a. The spiral tube 302b is a spiral pipe. When sewage passes through the spiral tube 302b, the sewage will obtain rotational kinetic energy, which helps the sewage to form a rotational motion. The rotational kinetic energy of the water flow is used to increase the flow rate, thereby increasing the thrust on the rotating scraper 302a.

[0046] Reference Figure 6Specifically, the inner wall of the spiral tube 302b is provided with rifling, which is a spiral groove engraved in the spiral tube 302b. The rifling will guide the water flow to rotate in the spiral direction, increase the rotational kinetic energy of the water flow, and at the same time, the rifling helps to guide the water flow to flow along a predetermined path, reduce the generation of turbulence and eddy currents, which helps to reduce the resistance of the water flow, improve the efficiency of the flow, and further increase the impact of the water flow on the rotating scraper 302a. The tail end of the spiral tube 302b is sequentially provided with a reduced diameter section 302c and an expanded diameter section 302d. The increase in the flow velocity of the water flow in the reduced diameter section 302c causes the local pressure to decrease, and a certain vacuum effect is formed inside the pipe, which helps to increase the suction force of the water flow. The flow velocity decreases in the expanded diameter section 302d, and the kinetic energy is converted into potential energy, which further increases the thrust on the rotating scraper 302a and increases the rotation speed of the rotating scraper 302a.

[0047] Reference Figure 6 Furthermore, the expanded diameter section 302d faces the rotating scraper 302a, and the top of the spiral tube 302b extends out of the vertical pipe 201a and is located in the filter tank 101. When the sewage water level is higher than the top of the vertical pipe 201a, the water flow will enter the spiral tube 302b and push the rotating scraper 302a to work.

[0048] Reference Figure 6 Furthermore, the vibration assembly 303 includes a tension spring 303a connected to the inner wall of the vertical tube 201a, a toggle plate 303b connected to the tension spring 303a, and a pull rope 303c connected to the toggle plate 303b, wherein the pull rope 303c and the tension spring 303a cooperate to move the toggle plate 303b.

[0049] Reference Figure 6 Furthermore, the vibration component 303 also includes a guide wheel 303d arranged on the second filter plate 301 and the vertical pipe 201a, and the pull rope 303c is connected to the swing rod 203f after passing through the guide wheel 303d, wherein the guide wheel 303d is used to change the direction of the pull rope 303c, and a plurality of protrusions are arranged at one end of the toggle plate 303b close to the second filter plate 301. During the movement of the toggle plate 303b, the protrusions and the filter holes of the second filter plate 301 rub against each other, so that the second filter plate 301 vibrates, and the suspended matter is shaken to the lower part of the second filter plate 301.

[0050] The rest of the structure is the same as that of Example 2.

[0051] Operation process: As the sewage water level changes, the height of the float 203g also changes, and the float 203g drives the swing rod 203f to rotate. At this time, the swing rod 203f will pull the pull rope 303c, and the pull rope 303c drives the toggle plate 303b to move. At the same time, the tension spring 303a is deformed. During the movement of the toggle plate 303b, the protrusions and the filter holes of the second filter plate 301 are rubbed against each other, causing the second filter plate 301 to vibrate, and the suspended matter is shaken off to the lower part of the second filter plate 301, ensuring that the second filter plate 301 can filter sewage;

[0052] When the sewage level is higher than the top of the vertical pipe 201a, water flows in from the top of the vertical pipe 201a. At this time, the flow rate of the water and the amount of suspended matter are increased compared with before, which brings challenges to the work of the second filter plate 301. At the same time, part of the water will enter the spiral tube 302b. The water will accelerate after passing through the spiral tube 302b, the rifling, the reduced diameter section 302c and the expanded diameter section 302d and flow to the rotating scraper 302a. The thrust of the water pushes the rotating scraper 302a to work, scraping off the suspended matter on the second filter plate 301. The suspended matter falls along the inclined second filter plate 301, and finally gathers at the lower part of the second filter plate 301, thereby intercepting more suspended matter, filtering more sewage, and avoiding sewage overflow.

[0053] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of the execution function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0054] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0055] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A mechanical closing device for underwater valves in a filter tank, characterized in that: include, A filter component (100), comprising a filter tank (101), a sewage inlet pipe (102) connected to the filter tank (101), a backwash inlet pipe (103), a purified water outlet pipe (104), a first filter plate (105) arranged inside the filter tank (101), and a handrail (106) arranged on the filter tank (101); A temporary sewage discharge component (200) comprises an overflow pipe (201) arranged on the first filter plate (105), an opening and closing assembly (202) arranged on the overflow pipe (201), and a power assembly (203) connected to the opening and closing assembly (202); and, The anti-blocking component (300) comprises a second filter plate (301) connected to the inner wall of the overflow pipe (201), a cleaning component (302) arranged in the overflow pipe (201), and a vibration component (303) arranged on the second filter plate (301).

2. The filter tank underwater valve mechanical closing device according to claim 1, characterized in that: The overflow pipe (201) comprises a vertical pipe (201a) arranged on the filter plate, a horizontal pipe (201b) connected to the vertical pipe (201a), and a water inlet (201c) connected to the horizontal pipe (201b).

3. The mechanical closing device for underwater valve of filter tank as claimed in claim 2, characterized in that: The opening and closing assembly (202) comprises a retaining ring (202a) arranged on the inner wall of the transverse tube (201b), a moving block (202b) slidably connected to the inner wall of the transverse tube (201b), and a sealing gasket (202c) sleeved on the moving block (202b).

4. The filter tank underwater valve mechanical closing device according to claim 3, characterized in that: The power assembly (203) comprises a push-pull rod (203a) connected to the moving block (202b) and passing through the cross tube (201b), a toggle rod (203b) connected to the push-pull rod (203a), a swing arm (203c) connected to the toggle rod (203b), a synchronization rod (203d) connected to the swing arm (203c), a disc (203e) connected to the synchronization rod (203d), a swing rod (203f) connected to the disc (203e), and a floating ball (203g) connected to the swing rod (203f).

5. The mechanical closing device for underwater valve of filter tank as claimed in claim 4, characterized in that: The synchronization rod (203d) is rotatably connected to a mounting seat (203h), the mounting seat (203h) is connected to the transverse tube (201b), a U-shaped groove is provided at the upper end of the swing arm (203c), the toggle rod (203b) is located in the U-shaped groove, and blocking pieces are provided at both ends of the toggle rod (203b).

6. The mechanical closing device for underwater valve of filter tank as claimed in claim 5, characterized in that: The cleaning assembly (302) comprises a rotating scraper (302a) arranged on the second filter plate (301), and a spiral tube (302b) arranged in the vertical tube (201a).

7. The mechanical closing device for underwater valve of filter tank as claimed in claim 6, characterized in that: The inner wall of the spiral tube (302b) is provided with rifling, and the tail end of the spiral tube (302b) is provided with a reduced diameter section (302c) and an expanded diameter section (302d) in sequence.

8. The mechanical closing device for underwater valve of filter tank as claimed in claim 7, characterized in that: The expanded diameter section (302d) faces the rotating scraper (302a), and the top end of the spiral tube (302b) extends out of the vertical tube (201a) and is located in the filter tank (101).

9. The mechanical closing device for underwater valve of filter tank according to claim 2 or 8, characterized in that: The vibration component (303) comprises a tension spring (303a) connected to the inner wall of the vertical pipe (201a), a toggle plate (303b) connected to the tension spring (303a), and a pull rope (303c) connected to the toggle plate (303b).

10. The mechanical closing device for underwater valve of filter tank according to claim 9, characterized in that: The vibration assembly (303) further comprises a guide wheel (303d) arranged on the second filter plate (301) and the vertical pipe (201a); the pull rope (303c) is connected to the swing rod (203f) after passing through the guide wheel (303d); and a plurality of protrusions are arranged at one end of the toggle plate (303b) close to the second filter plate (301).

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