Ballast water pretreatment device with backwashing function

Abstract

The ballast water pretreatment device with the backwashing function comprises a shell, a water inlet pipe, a first water outlet pipe and a second water outlet pipe are arranged on the shell, the second water outlet pipe is located at the position, close to the lower end, of the side face of the shell, and the water inlet pipe and the first water outlet pipe are located on the opposite side faces of the shell; a filtering piece capable of moving up and down is further arranged in the shell, a floating block is arranged on the filtering piece, a sealing film is arranged on the floating block, the upper end of the sealing film is connected with the side wall of the shell, the water inlet pipe extends to the lower portion of the filtering piece, and after the device is used for a long time, a large amount of impurities, sludge and the like can be accumulated in the shell, and at the moment, the filtering piece can move up and down. When the water inlet pipe is closed and the second water outlet pipe is opened, seawater in the shell can flow out through the second water outlet pipe, and when the seawater in the shell is about to completely flow out, water in the backwashing water tank can flow out through the through hole, and the filtering piece can be washed to a certain extent, so that the backwashing effect is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of ballast water treatment, and in particular relates to a ballast water pre-treatment device with a backwashing function. Background Art

[0002] During the voyage of a ship, ballast water plays an indispensable role in ensuring the safe and stable navigation of the ship. However, seawater cannot be used directly as ballast water and must undergo multiple stages of treatment. Before the core treatment processes such as disinfection and sterilization, it is particularly important to filter the seawater in order to remove various impurities mixed in the seawater.

[0003] At present, most filtration operations are carried out in specific tanks, and impurities are intercepted by the filter and retained in the tank. In order to maintain the efficient operation of the filtration equipment, a backwashing system is set up in the tank to clean the impurities accumulated in the tank at a certain period. However, the existing backwashing systems generally have the problem of complicated structure, and usually require multiple power components to operate in coordination. This not only makes the operating procedures cumbersome, but also greatly increases the maintenance cost and the probability of failure. It is difficult to achieve the requirements of convenience and efficiency in actual use. In view of this, after in-depth research and innovative design, this application proposes a ballast water pretreatment device with backwashing function. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides the following technical solutions: a ballast water pretreatment device with backwashing function, comprising a shell, on which a water inlet pipe, a first water outlet pipe and a second water outlet pipe are arranged, the second water outlet pipe is located on the side of the shell near the lower end, the water inlet pipe and the first water outlet pipe are located on opposite sides of the shell,

[0005] A filter element capable of moving up and down is also arranged in the housing, a floating block is arranged on the filter element, a sealing film is arranged on the floating block, the upper end of the sealing film is connected to the side wall of the housing, and the water inlet pipe extends to the bottom of the filter element.

[0006] A backwash water tank is also arranged on the side wall of the shell, a through hole is opened on the shell, the backwash water tank is connected with the through hole, and a sealing plate is arranged in the through hole, the inner upper wall of the through hole at the upper end of the sealing plate does not contact each other, the sealing plate can move up and down, and the height of the through hole is less than the height of the first water outlet pipe.

[0007] Preferably, the shell has a bottom surface which is inclined, and an inclined plate is fixedly connected to the inside of the shell. There is a gap between the lower end of the inclined plate and the side wall of the shell, and the higher end of the bottom surface is located below the lower end of the inclined plate, and the lower end of the water inlet pipe extends below the inclined plate.

[0008] Preferably, the filter element comprises a fixing frame and a filter screen, the filter screen is mounted inside the fixing frame, the floating block is mounted on the fixing frame, and a track is fixedly connected inside the shell, the track passes through the filter screen, and the filter screen can move up and down along the track.

[0009] Preferably, a valve handle is provided on the second water outlet pipe. When the valve handle is rotated, the second water outlet pipe can be opened. A rotating rod is also fixedly connected to the valve handle. A top gear is fixedly connected to the upper end of the rotating rod. A snap-fit ​​is threadedly connected to the side wall of the outer shell. When the top gear rotates, the snap-fit ​​can be separated from the sealing plate.

[0010] Preferably, the fastener includes a rotating gear, to which is fixedly connected an insertion rod, a clamping block is inserted into the free end of the insertion rod, and the clamping block is connected to the insertion rod via a second spring, the insertion rod is threadedly connected to the outer shell, a bracket is fixedly connected to the lower end of the sealing plate, a clamping slot is provided on the bracket, and the clamping block can be inserted into the clamping slot to fix the position of the sealing plate.

[0011] Preferably, a base is fixedly connected to the lower end of the track, a contact plate is disposed on the track outer sleeve, a first spring is disposed between the contact plate and the base, and the contact plate is located below the filter element.

[0012] Preferably, a fixing rod is fixedly connected to the contact plate, a rotatable transmission gear is arranged in the housing, the fixing rod and the bracket are respectively located on both sides of the transmission gear, and the fixing rod and the transmission gear, and the bracket and the transmission gear are meshed with each other.

[0013] Preferably, an upper fixed block is provided at the upper end of the sealing membrane, and a lower fixed block is provided at the lower end of the sealing membrane, the upper fixed block is fixedly connected to the inner wall of the outer shell, and the lower fixed block is fixedly connected to the floating block, and when the floating block floats upward, the upper end of the floating block can be pressed against the lower end of the upper fixed block, and the position of the upper fixed block is lower than the position of the first water outlet pipe.

[0014] Preferably, a support frame is fixedly connected to the side wall of the shell, and the rotating rod passes through the support frame.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] After the device is used for a long time, a large amount of impurities, sludge, etc. may accumulate in the shell. At this time, the water inlet pipe is closed and the second water outlet pipe is opened. The seawater in the shell can flow out through the second water outlet pipe. When the seawater in the shell is about to flow out, the water in the backwashing water tank can flow out through the through hole, and the filter element can be flushed to a certain extent to achieve the backwashing effect.

[0017] The water in the backwash water tank flows out and falls on the higher end of the inclined plate, and then the water flows to the higher end of the inclined plate to wash the upper surface of the inclined plate. After washing the inclined plate, the water falls on the higher end of the bottom surface, and then the bottom surface is washed again, thereby achieving the backwashing effect. Moreover, when the device is used, no external power equipment such as motors is required, which makes the implementation cost and use cost of the device lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the internal structure of one side of the whole invention;

[0020] Figure 2 It is a schematic diagram of the other side of the internal structure of the present invention as a whole;

[0021] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 4 It is a schematic diagram of the enlarged structure of one side of the sealing plate of the present invention;

[0023] Figure 5 It is a schematic diagram of the enlarged structure of one side of the rotating gear of the present invention;

[0024] In the figure: 1. shell; 2. water inlet pipe; 3. first water outlet pipe; 4. second water outlet pipe; 5. floating block; 6. fixing frame; 7. filter screen; 8. track; 9. sealing membrane; 10. upper fixing block; 11. lower fixing block; 12. through hole; 13. sealing plate; 14. bottom surface; 15. inclined plate; 16. rotating rod; 17. backwash water tank; 18. contact plate; 19. first spring; 20. base; 21. support frame; 22. top gear; 23. bracket; 24. bayonet; 25. transmission gear; 26. fixing rod; 27. rotating gear; 28. plug rod; 29. ​​block; 30. second spring; 31. valve handle. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described 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; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] Depend on Figure 1-5The present invention discloses a ballast water pretreatment device with a backwashing function, comprising a shell 1, on which a water inlet pipe 2, a first water outlet pipe 3 and a second water outlet pipe 4 are arranged, the second water outlet pipe 4 is located on a side of the shell 1 near the lower end, and the water inlet pipe 2 and the first water outlet pipe 3 are located on opposite sides of the shell 1.

[0027] A filter element capable of moving up and down is also provided in the housing 1, a floating block 5 is provided on the filter element, a sealing film 9 is provided on the floating block 5, and the upper end of the sealing film 9 is connected to the side wall of the housing 1, and the water inlet pipe 2 extends to the bottom of the filter element.

[0028] A backwash water tank 17 is also provided on the side wall of the shell 1. A through hole 12 is opened on the shell 1. The backwash water tank 17 is connected to the through hole 12, and a sealing plate 13 is provided in the through hole 12. The upper end of the sealing plate 13 and the inner upper wall of the through hole 12 do not contact each other. The sealing plate 13 can move up and down. When the sealing plate 13 moves upward, the water in the backwash water tank 17 can flow out. When the sealing plate 13 moves downward to the extreme position, the water in the backwash water tank 17 cannot flow out. The height of the through hole 12 is less than the height of the first water outlet pipe 3. When the seawater is filtered by the filter element, the seawater can also enter the backwash water tank 17.

[0029] When the device is in use, seawater enters the housing 1 from the water inlet pipe 2. As the amount of seawater continues to increase, the filter element gradually rises under the action of the floating block 5 until the filter element can no longer continue to rise. At this time, the seawater is filtered by the filter element, reaches the top of the filter element, and is discharged from the position of the first water outlet pipe 3. The use of the sealing membrane 9 can prevent unfiltered seawater from entering the top of the filter element through the gap between the filter element and the housing 1.

[0030] After the device is used for a long time, a large amount of impurities, sludge, etc. may accumulate in the shell 1. At this time, the water inlet pipe 2 is closed and the second water outlet pipe 4 is opened. The seawater in the shell 1 can flow out through the second water outlet pipe 4. When the seawater in the shell 1 is about to flow out, the water in the backwashing water tank 17 can flow out through the through hole 12, and the filter element can be flushed to a certain extent to achieve the backwashing effect.

[0031] When the water in the backwash water tank 17 flows out, it can also exert a certain impact on the filter element, thereby causing the impurities attached to the lower end of the filter element to be separated from the filter element under the action of the impact force.

[0032] The shell 1 has a bottom surface 14, which is inclined. An inclined plate 15 is fixedly connected to the inside of the shell 1. There is a gap between the lower end of the inclined plate 15 and the side wall of the shell 1, and the higher end of the bottom surface 14 is located below the lower end of the inclined plate 15. The lower end of the water inlet pipe 2 extends below the inclined plate 15.

[0033] The arrangement of the inclined plate 15 can provide a certain buffer for the incoming seawater, so that most of the impurities in the seawater can be deposited under the inclined plate 15 .

[0034] The water in the backwash water tank 17 flows out and falls on the higher end of the inclined plate 15, so that the water flows to the higher end of the inclined plate 15 to wash the upper surface of the inclined plate 15. After washing the inclined plate 15, the water falls on the higher end of the bottom surface 14, and then washes the bottom surface 14 again, thereby achieving the backwashing effect. Moreover, when the device is used, no external power equipment such as a motor is required, which makes the implementation cost and the use cost of the device lower.

[0035] The filter element includes a fixing frame 6 and a filter screen 7. The filter screen 7 is installed inside the fixing frame 6. The floating block 5 is installed on the fixing frame 6. A track 8 is also fixed in the shell 1. The track 8 passes through the filter screen 7, and the filter screen 7 can move up and down along the track 8.

[0036] The second water outlet pipe 4 is provided with a valve handle 31. When the valve handle 31 is rotated, the second water outlet pipe 4 can be opened. A rotating rod 16 is also fixedly connected to the valve handle 31. A top gear 22 is fixedly connected to the upper end of the rotating rod 16. A snap-fit ​​is threadedly connected to the side wall of the outer shell 1. When the top gear 22 is rotated, the snap-fit ​​can be separated from the sealing plate 13.

[0037] The valve handle 31 can be electric or manual.

[0038] The valve handle 31 is used to notify the opening and closing of the second water outlet pipe 4.

[0039] The fastener includes a rotating gear 27, to which an insertion rod 28 is fixedly connected, a block 29 is inserted into the free end of the insertion rod 28, and the block 29 is connected to the insertion rod 28 via a second spring 30, the insertion rod 28 is threadedly connected to the housing 1, a bracket 23 is fixedly connected to the lower end of the sealing plate 13, a bayonet 24 is provided on the bracket 23, and the block 29 can be inserted into the bayonet 24 to fix the position of the sealing plate 13.

[0040] When it is necessary to clean the inside of the shell 1, close the water inlet pipe 2 and rotate the valve handle 31 to open the second water outlet pipe 4. When the valve handle 31 is rotated, the rotating gear 27 cooperates with the top gear 22 to make the block 29 slide out of the bayonet 24, thereby allowing the sealing plate 13 to move upward.

[0041] The lower end of the track 8 is fixedly connected with a base 20 to prevent the filter from being separated from the track 8. A contact plate 18 is disposed on the track 8. A first spring 19 is disposed between the contact plate 18 and the base 20. The contact plate 18 is located below the filter.

[0042] A fixing rod 26 is fixedly connected to the contact plate 18 , and a rotatable transmission gear 25 is arranged in the housing 1 . The fixing rod 26 and the bracket 23 are respectively located on both sides of the transmission gear 25 , and the fixing rod 26 and the transmission gear 25 , and the bracket 23 and the transmission gear 25 are meshed with each other.

[0043] After the valve handle 31 is turned, as the seawater in the housing 1 continues to decrease, the filter element moves downward until it is pressed on the contact plate 18, then the first spring 19 is compressed, the fixing rod 26 is pulled downward, and the bracket 23 is pushed upward through the action of the transmission gear 25, that is, at this time, the sealing plate 13 is pushed upward, thereby allowing the water in the backwash water tank 17 to flow out.

[0044] An upper fixed block 10 is provided at the upper end of the sealing membrane 9, and a lower fixed block 11 is provided at the lower end of the sealing membrane 9. The upper fixed block 10 is fixedly connected to the inner wall of the outer shell 1, and the lower fixed block 11 is fixedly connected to the floating block 5. When the floating block 5 floats upward, the upper end of the floating block 5 can be against the lower end of the upper fixed block 10, and the position of the upper fixed block 10 is lower than the position of the first water outlet pipe 3.

[0045] The upper fixing block 10 and the lower fixing block 11 are used together to facilitate the installation of the sealing membrane 9 , and the upper fixing block 10 can also limit the filter element to a certain extent to prevent it from rising above the first water outlet pipe 3 .

[0046] A support frame 21 is fixedly connected to the side wall of the housing 1 , and the rotating rod 16 passes through the support frame 21 to limit the rotating rod 16 .

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ballast water pre-treatment device with backwashing function, characterized in that: The invention comprises a housing (1), on which a water inlet pipe (2), a first water outlet pipe (3) and a second water outlet pipe (4) are arranged, the second water outlet pipe (4) being located on a side surface of the housing (1) close to the lower end, the water inlet pipe (2) and the first water outlet pipe (3) being located on opposite sides of the housing (1), A filter element capable of moving up and down is also provided in the housing (1), a floating block (5) is provided on the filter element, a sealing membrane (9) is provided on the floating block (5), the upper end of the sealing membrane (9) is connected to the side wall of the housing (1), and the water inlet pipe (2) extends to the bottom of the filter element. A backwash water tank (17) is also provided on the side wall of the housing (1). A through hole (12) is provided on the housing (1). The backwash water tank (17) is connected to the through hole (12). A sealing plate (13) is provided in the through hole (12). The upper end of the sealing plate (13) and the inner upper wall of the through hole (12) do not contact each other. The sealing plate (13) can move up and down. The height of the through hole (12) is less than the height of the first water outlet pipe (3).

2. The ballast water pre-treatment device with backwashing function according to claim 1, characterized in that: The housing (1) has a bottom surface (14) which is arranged in an inclined manner. An inclined plate (15) is fixedly connected to the interior of the housing (1). A gap is provided between the lower end of the inclined plate (15) and the side wall of the housing (1). The higher end of the bottom surface (14) is located below the lower end of the inclined plate (15). The lower end of the water inlet pipe (2) extends below the inclined plate (15).

3. The ballast water pre-treatment device with backwashing function according to claim 1, characterized in that: The filter element comprises a fixing frame (6) and a filter screen (7), wherein the filter screen (7) is mounted inside the fixing frame (6), and the floating block (5) is mounted on the fixing frame (6). A track (8) is also fixedly connected inside the housing (1), wherein the track (8) passes through the filter screen (7), and the filter screen (7) can move up and down along the track (8).

4. The ballast water pre-treatment device with backwashing function according to claim 3 is characterized in that: The second water outlet pipe (4) is provided with a valve handle (31), and when the valve handle (31) is rotated, the second water outlet pipe (4) can be opened. A rotating rod (16) is also fixedly connected to the valve handle (31), and a top gear (22) is fixedly connected to the upper end of the rotating rod (16). A snap-fitting piece is threadedly connected to the side wall of the housing (1), and when the top gear (22) is rotated, the snap-fitting piece can be separated from the sealing plate (13).

5. The ballast water pre-treatment device with backwashing function according to claim 4 is characterized in that: The latching member comprises a rotating gear (27), an insert rod (28) is fixedly connected to the rotating gear (27), a clamping block (29) is inserted into the free end of the insert rod (28), and the clamping block (29) is connected to the insert rod (28) via a second spring (30), the insert rod (28) is threadedly connected to the housing (1), a bracket (23) is fixedly connected to the lower end of the sealing plate (13), a clamping slot (24) is provided on the bracket (23), and the clamping block (29) can be inserted into the clamping slot (24) to fix the position of the sealing plate (13).

6. The ballast water pre-treatment device with backwashing function according to claim 5, characterized in that: The lower end of the track (8) is fixedly connected to a base (20), a contact plate (18) is disposed on the track (8), a first spring (19) is disposed between the contact plate (18) and the base (20), and the contact plate (18) is located below the filter element.

7. The ballast water pre-treatment device with backwashing function according to claim 6, characterized in that: A fixing rod (26) is fixedly connected to the contact plate (18), a rotatable transmission gear (25) is arranged in the housing (1), the fixing rod (26) and the bracket (23) are respectively located on both sides of the transmission gear (25), and the fixing rod (26) and the transmission gear (25) and the bracket (23) and the transmission gear (25) are meshed with each other.

8. The ballast water pre-treatment device with backwashing function according to claim 7 is characterized in that: An upper fixing block (10) is provided at the upper end of the sealing membrane (9), and a lower fixing block (11) is provided at the lower end of the sealing membrane (9); the upper fixing block (10) is fixedly connected to the inner wall of the outer shell (1), and the lower fixing block (11) is fixedly connected to the floating block (5); when the floating block (5) floats upward, the upper end of the floating block (5) can press against the lower end of the upper fixing block (10), and the position of the upper fixing block (10) is lower than the position of the first water outlet pipe (3).

9. The ballast water pre-treatment device with backwashing function according to claim 8, characterized in that: A support frame (21) is fixedly connected to the side wall of the housing (1), and the rotating rod (16) passes through the support frame (21).

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