Sand flushing device

Abstract

The utility model discloses a sand flushing device in the technical field of water conservancy and hydropower engineering. The device comprises a water taking assembly, a jet assembly and a pipeline assembly, the water taking assembly comprises a water taking pipe and a water pump, one end of the water taking pipe is connected with a water source, the other end of the water taking pipe is connected with a water pump inlet, a filtering assembly is arranged in the water taking pipe, a water pump outlet is connected with the pipeline assembly, and the jet assembly is connected to the end, away from the water pump, of the pipeline assembly; the filtering box is in a prism shape and is connected to the middle of the water taking pipe, the two bottom faces of the prism are communicated with the water taking pipe, the filtering net is arranged in the filtering box and used for filtering water passing through the filtering box, the filtering net comprises a support used for fixing the filtering net, the filtering box is provided with an inserting groove used for the support to pass through, and a sealing piece is arranged between the support and the filtering box. The filter box is additionally arranged, the filter screen is arranged in the filter box, the effective filtering area of the filter screen can be larger, the filter screen is inserted into the filter box through the support, and the filter screen is convenient to replace and clean.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy and hydropower engineering, and particularly relates to a sand flushing device. Background Art

[0002] The sand flushing device for the gate slot of a hydropower station is a device used to clean the accumulated sand and silt at the bottom of the gate slot. As water flows through the gate slot of the hydropower station, the sand and silt in the riverbed will be washed to the bottom of the gate slot. If not cleaned in time, it will cause the blockage of the gate slot, affecting the smooth flow of water and the normal operation of the gate. The sand flushing device generally consists of a sand flushing pipeline, a nozzle, a sewage cleaning pump, etc. in the hydropower station equipment. During operation, by controlling the sand flushing pipeline below the gate slot, high-speed water flow is sprayed onto the bottom of the gate slot to wash up the sand and silt, and then discharged through the sewage cleaning pump. The function of the sand flushing device is to keep the gate slot unobstructed, prevent the accumulation of sand and silt from having an adverse impact on the operation of the hydropower station. At the same time, regularly cleaning the gate slot can also extend the service life of the gate and ensure the safe and stable operation of the hydropower station.

[0003] Chinese Patent: CN219773073U discloses a sand flushing device for the gate slot of a hydropower station. The sand flushing device includes: a water intake assembly, a pipeline assembly, and a jet assembly. The jet assembly is buried at the bottom ends of the two vertical slots of the gate slot, and the water intake assembly is arranged at the top of the gate slot. The water is pressurized and diverted to the jet assembly through the pipeline assembly, and finally, a high-speed water column is sprayed into the interior of the bottom slot through the jet assembly to wash away the accumulated sediment, and the high-speed water column is used to drive the water body near the bottom slot to quickly surge to disperse the sediment around the bottom slot, so that when the gate is lowered, it is not affected by the sediment accumulated inside and around the gate slot, and no underwater operation by workers is required while the efficiency is relatively high.

[0004] For the above-mentioned sand flushing device for the gate slot of a hydropower station, water is taken from an external water source through the water intake assembly. A filter is provided on the water intake assembly, and the external water source is filtered through the filter to reduce the sediment in the water source. However, since the filter is arranged in the external water source, on the one hand, it is arranged at the end of the pipeline, and the effective filtering area is small; on the other hand, it cannot be cleaned in time, and may be blocked by the sediment in the water source after long-term use, resulting in insufficient water pressure of the sand flushing assembly, thereby reducing the flushing effect of the sand flushing device on the sediment inside the gate slot. Content of the Utility Model

[0005] To overcome the problem that the filter may be blocked by sediment in the water source after long-term use of the existing sand flushing device, which may further lead to insufficient water pressure of the sand flushing assembly, the utility model provides a sand flushing device in which the effective filtering area of the filter screen can be implemented to be larger than the cross-sectional area of the water intake pipe, and the filter screen is convenient to replace.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] The sand flushing device includes a water intake component, a jet component, and a pipeline component. The water intake component includes a water intake pipe and a water pump. One end of the water intake pipe is used to connect to a water source, and the other end is connected to the inlet of the water pump. A filtering component is provided in the water intake pipe. The outlet of the water pump is connected to the pipeline component. The jet component is connected to one end of the pipeline component far from the outlet of the water pump. The filtering component includes a filtering box and a filter screen. The filtering box is prism-shaped. The filtering box is connected to the middle of the water intake pipe. The two bottom surfaces of the prism communicate with the water intake pipe. The filter screen is arranged in the filtering box and is used to filter the water passing through the filtering box. It includes a bracket for fixing the filter screen. A slot for the bracket to pass through is opened on the filtering box. A sealing member is arranged between the bracket and the filtering box.

[0008] In the present application, the filtering component of the sand flushing device is set as a filtering box. A filter screen is fixedly arranged in the filtering box. The filtering box is prism-shaped, and the two bottom surfaces of the prism are connected to the water intake pipe, so that the water flow distribution in the filtering box is uniform. The filter screen is arranged in the filtering box and is specifically fixed on the bracket. The bracket is inserted into the filtering box, so as to realize the detachable connection of the filter screen, which is convenient for cleaning and replacement. By arranging a sealing member between the bracket and the filtering box, it is avoided that sediment flows through without being filtered.

[0009] In some embodiments, the filtering box is a cuboid. Taking the surface of the cuboid connected to the water intake pipe as the bottom surface, the filter screen is arranged parallel to the bottom surface. The sealing member includes a sealing groove and a sealing gasket that cooperate with each other. The sealing groove is fixedly arranged on the side wall of the filtering box, and the bracket is correspondingly provided with the sealing gasket. The bracket is slidably connected and inserted into the filtering box.

[0010] In this embodiment, it is preferably that the filtering box is a cuboid and the filter screen is arranged parallel to the bottom surface, which is convenient for processing and implementation, convenient for the sliding connection between the bracket and the filtering box, and simplifies the structure of the bracket.

[0011] In some embodiments, the water intake pipe includes a horizontal section arranged horizontally. The filtering box is connected to the middle of the horizontal section. The bottom of the filtering box is open, and it further includes a baffle that can be opened and closed. The baffle is connected to the bottom of the filtering box, and the filter screen is connected to the side close to the outlet of the filtering box.

[0012] In this embodiment, the water intake pipe where the filtering box is located is arranged horizontally. Combining with the aforementioned filter screen arranged parallel to the bottom surface, at this time, the sediment filtered out by the filter screen will settle on the baffle at the bottom of the sand flushing device. After the sand flushing device is used for a period of time, the baffle can be opened, so as to reduce the sediment content in the water intake pipe and further avoid the blockage of the filter screen caused by long-term use.

[0013] In some embodiments, the filtering component further includes a driving member for driving the baffle to open and close.

[0014] In this embodiment, the opening and closing of the baffle is realized by a driving member. Compared with manual opening and closing, the operation is more convenient and can reduce manual underwater operations. Obviously, the driving member includes various optional forms, such as motors, cylinders, etc. And the opening and closing of the baffle can be in conventional forms such as rotational opening and closing, sliding opening and closing, etc.

[0015] In some embodiments, the driving member is a motor, the baffle is rotatably arranged, and the output shaft of the motor is fixedly connected to the baffle rotating shaft.

[0016] In this embodiment, the driving member is preferably a motor, the control is simpler and more convenient, and the output shaft of the motor is fixedly connected to the baffle rotating shaft, which is more convenient to implement.

[0017] In some embodiments, a sand discharge assembly is further included. The sand discharge assembly includes a collection box, the collection box is connected below the filter box, and the top of the collection box is open for the baffle to open and close.

[0018] In this embodiment, a collection box is arranged below the filter box. On the one hand, it can collect the sediment below the filter, and on the other hand, it can protect the baffle to avoid interference during its opening and closing process and prevent foreign objects from entering the filter box during the opening and closing process.

[0019] In some embodiments, the collection box is a cuboid, the bottom of the filter box is in contact with the top of the collection box, and the length direction of the bottom of the filter box is the same as the direction of the baffle rotating shaft.

[0020] In this embodiment, both the filter box and the collection box are cuboids, and the bottom of the filter box is in contact with the top of the collection box, which is convenient for implementation and processing; considering that the bottom of the gate slot of the hydropower station needs to be flushed with sand, preferably, the length direction of the bottom of the filter box is the same as the direction of the baffle rotating shaft to optimize and reduce the height of the collection box.

[0021] In some embodiments, two baffles are symmetrically arranged along the width direction of the bottom of the filter box.

[0022] In this embodiment, two baffles are symmetrically arranged along the width direction of the bottom of the filter box to further optimize and reduce the height of the collection box.

[0023] In some embodiments, the two baffle rotating shafts are symmetrically distributed on both sides of the width direction of the bottom of the filter box, and a metal block and an electromagnet are respectively arranged on one side where the two baffles are close to each other.

[0024] In this embodiment, the two sides where the two baffles are away from each other are set as rotating shafts, and a metal block and an electromagnet are arranged on the side where they are close to each other, so that when the two baffles are in the closed state, it is not easy to open the two baffles.

[0025] In some embodiments, the sand discharge assembly further includes a collection box, the collection box is removably arranged in the collection box, and a handle is arranged outside the collection box.

[0026] In this embodiment, by adding a collection box, the sediment in the collection tank can be taken out, facilitating the long-term use of the sand flushing device; a handle is provided outside the collection box for easy removal of the collection box.

[0027] The beneficial effects of the present utility model are as follows:

[0028] 1. By adding a filter box with a filter screen arranged inside, the effective filtering area of the filter screen can be made larger, and the filter screen is inserted into the filter box through a bracket, facilitating the replacement and cleaning of the filter screen.

[0029] 2. The water intake pipe where the filter box is located is horizontally arranged, enabling the opening and closing of the bottom of the filter box to achieve the discharge of sediment inside the filter box; the motor drives the baffle to open and close, with simple control and convenient implementation.

[0030] 3. A sand discharge assembly is added to protect the opening and closing of the baffle and can collect and discharge sediment. Description of the Drawings

[0031] Figure 1 It is a schematic diagram of the overall structure of the sand flushing device provided by the present utility model;

[0032] Figure 2 It is a schematic diagram of the overall structure of the sand discharge assembly in the sand flushing device provided by the present utility model;

[0033] Figure 3 It is a schematic diagram of the structure of the baffle in the sand flushing device provided by the present utility model;

[0034] Figure 4 It is a schematic diagram of the structure of the filter assembly in the sand flushing device provided by the present utility model;

[0035] Figure 5 It is a schematic diagram of the detachable connection structure of the pipeline assembly in the sand flushing device provided by the present utility model Figure 1 ;

[0036] Figure 6 It is a schematic diagram of the detachable connection structure of the pipeline assembly in the sand flushing device provided by the present utility model Figure 2 。

[0037] In the figure, the markings are: 1, main pipeline; 2, water pump; 3, connection assembly; 31, first connection block; 32, second connection block; 33, first fixing block; 34, second fixing block; 35, limiting plate; 36, inner groove; 4, jet assembly; 41, shunt pipe; 42, nozzle; 5, filter assembly; 51, filter box; 52, water inlet; 53, water intake pipe; 54, bracket; 55, filter screen; 56, sealing gasket; 57, sealing groove; 6, sand discharge assembly; 61, collection tank; 62, baffle; 63, motor; 64, rotating shaft; 65, metal block; 66, electromagnet; 67, collection box; 68, handle. Detailed implementation mode

[0038] The present utility model will be further described below with reference to the accompanying drawings.

[0039] In order to make the purpose, technical solution and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0040] As Figures 1 - 6 shown, the present utility model provides a sand flushing device.

[0041] The sand flushing device includes a water intake component, a jet component 4 and a pipeline component. The water intake component includes a water intake pipe 53 and a water pump 2. One end of the water intake pipe 53 is used to connect to a water source, and the other end is connected to the inlet of the water pump 2. A filtering component 5 is provided in the water intake pipe 53. The outlet of the water pump 2 is connected to the pipeline component. In this embodiment, the pipeline component is also Figure 1 the main pipeline 1 shown in Figure 1 , and the jet component 4 is also

[0042] the shunt pipe 41 shown in

[0043] and a plurality of nozzles 42 connected to the shunt pipe 41. The jet component 4 is connected to one end of the pipeline component far from the outlet of the water pump 2. The filtering component 5 includes a filtering box 51 and a filter net 55 detachably connected in the filtering box 51. The filtering box 51 is prism-shaped. The filtering box 51 is connected to the middle of the water intake pipe 53. The two bottom surfaces of the prism are communicated with the water intake pipe 53. The filter net 55 is arranged in the filtering box 51 and is used for filtering the water body passing through the filtering box 51. It also includes a bracket 54 for fixing the filter net 55. A slot for the bracket 54 to pass through is opened on the filtering box 51, and a sealing member is arranged between the bracket 54 and the filtering box 51.

[0044] In this embodiment, the filter box 51 is a cuboid. Taking the surface of the cuboid connected to the water intake pipe 53 as the bottom surface of the cuboid, the filter screen 55 is arranged parallel to the bottom surface. The seal includes a sealing groove 57 and a sealing gasket 56 that cooperate with each other. The sealing groove 57 is fixedly arranged on the side wall of the filter box 51, and the sealing gasket 56 is correspondingly arranged on the support 54. The support 54 is slidably connected and inserted into the filter box 51. When the support 54 slides relative to the filter box 51, the sealing gasket 56 slides relative to the sealing groove 57. By preferably setting the filter box 51 as a cuboid and the filter screen 55 parallel to the bottom surface as above, it is convenient for processing and implementation, convenient for the sliding connection between the support 54 and the filter box 51, and simplifies the structure of the support 54.

[0045] In this embodiment, the water intake pipe 53 includes a horizontal section arranged horizontally. The filter box 51 is connected to the middle of the horizontal section. The bottom of the filter box 51 is open, and it further includes a baffle 62 that can be opened and closed. The baffle 62 is connected to the bottom of the filter box 51, and the filter screen 55 is connected to the side of the filter box 51 close to the outlet. The filter box 51 is arranged horizontally in the water intake pipe 53. Combining the above-mentioned filter screen 55 arranged parallel to the bottom surface, at this time, the sediment filtered out by the filter screen 55 will settle on the baffle 62 at the bottom of the filter box 51. After the sand washing device is used for a period of time, the baffle 62 can be opened, thereby reducing the sediment content in the filter box 51 and further avoiding the blockage of the filter screen 55 caused by long-term use; to facilitate the sediment filtered out by the filter screen 55 to settle at the bottom of the filter box 51, the filter screen 55 is connected to the side of the filter box 51 close to the outlet, so that the sediment settlement area is relatively large. As Figure 1 and Figure 4 shown, the filter screen 55, that is, the support 54 here, is preferably arranged on the side of the filter box 51 away from the water inlet 52. Obviously, the opening and closing of the baffle 62 can be realized manually or by a driving member.

[0046] Obviously, in the previous description, when discussing the bottom surface, it is based on the bottom surface among the two bottom surfaces and several side surfaces of the prism; for the purpose of distinguishing the description, when the water intake pipe 53 is arranged horizontally and the filter box 51 is correspondingly arranged, the bottom refers to the low position of the horizontal height of the filter box 51.

[0047] In this embodiment, preferably, the water intake pipes 53 on both sides of the filter box 51 are connected to the middle and upper positions of the filter box 51, which is convenient for sediment to be collected into the filter box 51.

[0048] In this embodiment, the filter assembly 5 further includes a driving member for driving the baffle 62 to open and close. By using the driving member to realize the opening and closing of the baffle 62, compared with manual opening and closing, the operation is more convenient and can reduce manual underwater operations. Obviously, the driving member includes various optional forms, such as a motor 63, a cylinder, etc. And the opening and closing of the baffle 62 can generally be in forms such as rotational opening and closing, sliding opening and closing, etc.

[0049] Furthermore, in this embodiment, the driving member is a motor 63, the baffle 62 is rotatably arranged, and the output shaft of the motor 63 is fixedly connected to the rotating shaft 64 of the baffle 62. The driving member is preferably a motor 63, which makes the control simpler and more convenient. Moreover, since the output shaft of the motor 63 is fixedly connected to the rotating shaft 64 of the baffle 62, the implementation is more convenient. It is also convenient for expansion applications to achieve timely and automatic cleaning of the filtered sediment.

[0050] In this embodiment, it further includes a sand discharging assembly 6. The sand discharging assembly 6 includes a collection box 61. The collection box 61 is connected below the filter box 51, and the top of the collection box 61 is open for the baffle 62 to open and close. The collection box 61 is arranged below the filter box 51. On the one hand, it can collect the sediment below the filter, and on the other hand, it can protect the baffle 62 to avoid interference during its opening and closing process and prevent foreign objects from entering the filter box 51 during the opening and closing process.

[0051] It should be noted that in this embodiment, the collection box 61 is fixedly connected below the filter box 51. Therefore, the top of the collection box 61 is also the bottom of the filter box 51. In this embodiment, the baffle 62 is openably connected to the top of the collection box 61. Obviously, the baffle 62 can be openably connected to the bottom of the filter box, and no specific limitation is made here.

[0052] In this embodiment, the collection box 61 is a cuboid, and the bottom of the filter box 51 fits with the top of the collection box 61, which is convenient for processing and implementation. Considering the need to wash the bottom of the gate slot of the hydropower station, preferably, the length direction of the bottom of the filter box 51 is the same as the direction of the rotating shaft of the baffle 62 to optimize and reduce the height of the collection box 61.

[0053] Furthermore, in this embodiment, two baffles 62 are symmetrically arranged along the width direction of the bottom of the filter box 51 to further optimize and reduce the height of the collection box 61.

[0054] In this embodiment, the rotating shafts 64 of the two baffles 62 are symmetrically distributed on both sides of the width direction of the bottom of the filter box 51. The sides of the two baffles 62 facing away from each other are set as the rotating shafts 64, and the sides facing each other are provided with a metal block 65 and an electromagnet 66, so that when the two baffles 62 are in the closed state, it is not easy to open the two baffles 62.

[0055] In this embodiment, the sand discharging assembly 6 further includes a collection box 67. The collection box 67 is removably arranged in the collection box 61, and a handle 68 is provided outside the collection box 67. By adding the collection box 67, the sediment in the collection box 61 can be taken out, which is convenient for the long-term use of the sand washing equipment. The handle 68 is provided outside the collection box 67, which is convenient for taking out the collection box 67.

[0056] The collection box 67 is inserted into the collection box 61. Preferably, it is taken out and put back by horizontally pulling the handle 68 here.

[0057] In this embodiment, the seal between the bracket 54 and the side wall of the filter box 51 is implemented such that sealing gaskets 56 are provided on both sides of the bracket 54, and corresponding sealing grooves 57 are provided on the side wall of the filter box 51 to balance the sealing and relative movement requirements of both. Pulling the bracket 54 can remove the bracket 54 from the inside of the filter box 51, thus facilitating the replacement of the filter screen 55 inside the bracket 54. Sealing gaskets 56 are installed on both sides of the bracket 54, and the sealing gaskets 56 are inserted inside the sealing grooves 57 to make the space between the bracket 54 and the filter box 51 airtight. Thereby, the sand flushing device can easily replace the filter screen 55, improving the work efficiency of daily maintenance. At the same time, the sealing performance between the filter box 51 and the bracket 54 can also be improved, enhancing the filtering effect of the sand flushing device on the internal water flow. During comprehensive implementation, the sediment in the collection box 67 can also be processed when replacing the filter screen 55.

[0058] In this embodiment, as Figure 1 shown, several support members are also connected below the sand flushing device to support the device to the required height.

[0059] In this embodiment, to avoid the situation that it is not easy to replace the pipeline components, that is, the main pipeline 1 mentioned above, when there is damage outside or inside the main pipeline 1, preferably, the main pipeline 1 and the water intake component, as well as the main pipeline 1 and the jet component 4, are detachably connected. In this embodiment, the detachable connection structure is implemented by the connection component 3 as Figure 5 and Figure 6 shown.

[0060] Specifically, the connection component 3 includes a first connection block 31 and a second connection block 32. The first connection block 31 is provided on the shunt pipe 41 and the water pump 2, and the second connection block 32 is fixedly connected to the main pipeline 1. On the sides of the first connection block 31 and the second connection block 32 that are close to each other, first fixing blocks 33 are fixedly connected. On the sides of the first connection block 31 and the second connection block 32 close to the first fixing blocks 33, second fixing blocks 34 are fixedly connected. The first connection block 31 and the second connection block 32 are clamped through the first fixing blocks 33 and the second fixing blocks 34. By providing the second fixing block 34 on the first connection block 31, the first connection block 31 and the second connection block 32 are connected. Rotating the first connection block 31 makes the first fixing block 33 move to the inner side of one side of the second fixing block 34, enabling the first fixing block 33 and the second fixing block 34 to be clamped. While the main pipeline 1 is fixedly installed on the water pump 2 and the flushing component 4, it also facilitates the removal of the main pipeline 1 with a greater degree of wear from the sand flushing device.

[0061] A limiting plate 35 is fixedly connected to one end of the water pump 2 and the shunt pipe 41 close to the first connection block 31. An inner groove 36 is formed at one end of the first connection block 31 close to the limiting plate 35. The first connection block 31 is rotationally connected to the water pump 2 and the shunt pipe 41 through the limiting plate 35 and the inner groove 36. By providing the limiting plate 35 and forming an inner groove 36 matching the limiting plate 35 on the inner side of the first connection block 31, the first connection block 31 can rotate along the shunt pipe 41 and the water pump 2 through the limiting plate 35 and the inner groove 36.

[0062] Working principle: As Figures 1 - 6 shown, first, the main pipeline 1 is arranged between the water pump 2 and the shunt pipe 41 to close the first connection block 31 and the second connection block 32. Pull the first connection block 31 to make the first connection block 31 rotate along the limiting plate 35 through the inner groove 36, so that the first connection block 31 drives the first fixing block 33 to rotate to the inner side of the second fixing block 34, and the first fixing block 33 and the second fixing block 34 are clamped, thereby fixedly installing the main pipeline 1 between the water pump 2 and the shunt pipe 41.

[0063] Connect the water inlet 52 to an external water supply system, so that the external water flow can flow into the interior of the filter tank 51 along the water inlet 52. The filter screen 55 inside the bracket 54 filters the water flow and filters out the sediment in the water flow. Start the water pump 2, and the water pump 2 transports the filtered clear water inside the filter tank 51 to the interior of the main pipeline 1 through the water intake pipe 53, and then sends it into the shunt pipe 41 and the spray head 42 along the main pipeline 1, so that the clear water sprays out from the inside of the spray head 42 to wash the sediment on the inner side of the gate slot.

[0064] After the sediment flushing is completed, cut off the power supply of the electromagnet 66 inside the baffle 62 to make the electromagnet 66 lose its magnetism. At this time, start the motor 63, and the motor 63 drives the baffle 62 to rotate downward through the rotating shaft 64, so that the sediment accumulated on the baffle 62 slides into the interior of the collection box 61, so that the sand flushing device can automatically clean the filtered sediment in time.

[0065] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Sand flushing device, comprising a water intake component, a jet component (4) and a pipeline component, the water intake component comprising a water intake pipe (53) and a water pump (2), one end of the water intake pipe (53) being used for connecting to a water source, the other end being connected to the inlet of the water pump (2), a filtering component (5) being provided in the water intake pipe (53), the outlet of the water pump (2) being connected to the pipeline component, the jet component (4) being connected to one end of the pipeline component far from the outlet of the water pump (2), characterized in that: The filtering component (5) includes a filtering box (51) and a filter screen (55). The filtering box (51) is prismatic. The filtering box (51) is connected to the middle of the water intake pipe (53). The two bottom surfaces of the prism communicate with the water intake pipe (53). The filter screen (55) is arranged inside the filtering box (51) and is used to filter the water passing through the filtering box (51). It includes a bracket (54) for fixing the filter screen (55). Slots for the bracket (54) to pass through are opened on the filtering box (51), and a seal is arranged between the bracket (54) and the filtering box (51).

2. The sand flushing device according to claim 1, characterized in that: The filtering box (51) is a cuboid. Taking the surface of the cuboid connected to the water intake pipe (53) as the bottom surface, the filter screen (55) is arranged parallel to the bottom surface. The seal includes a sealing groove (57) and a sealing gasket (56) that cooperate with each other. The sealing groove (57) is fixedly arranged on the side wall of the filtering box (51), and the bracket (54) is correspondingly provided with the sealing gasket (56). The bracket (54) is slidably inserted into the filtering box (51).

3. The sand flushing device according to claim 2, characterized in that: The water intake pipe (53) includes a horizontal section arranged horizontally. The filtering box (51) is connected to the middle of the horizontal section. The bottom of the filtering box (51) is open, and it also includes a baffle (62) that can be opened and closed. The baffle (62) is connected to the bottom of the filtering box (51), and the filter screen (55) is connected to the side of the filtering box (51) close to the outlet.

4. The sand flushing device according to claim 3, characterized in that: The filtering component (5) also includes a driving member for driving the baffle (62) to open and close.

5. The sand flushing device according to claim 4, characterized in that: The driving member is a motor (63). The baffle (62) is rotatably arranged, and the output shaft of the motor (63) is fixedly connected to the rotating shaft (64) of the baffle (62).

6. The sand flushing device according to claim 5, characterized in that: It also includes a sand discharging component (6). The sand discharging component (6) includes a collection box (61). The collection box (61) is connected below the filtering box (51). The top of the collection box (61) is open for the baffle (62) to open and close.

7. The sand flushing device according to claim 6, characterized in that: The collection box (61) is a cuboid. The bottom of the filtering box (51) fits with the top of the collection box (61). The length direction of the bottom of the filtering box (51) is the same as the direction of the rotating shaft (64) of the baffle (62).

8. The sand flushing device according to claim 7, characterized in that: Along the width direction of the bottom of the filtering box (51), two baffles (62) are symmetrically arranged.

9. The sand flushing device according to claim 8, characterized in that: The rotating shafts (64) of the two baffles (62) are symmetrically distributed on both sides of the width direction of the bottom of the filtering box (51). A metal block (65) and an electromagnet (66) are respectively arranged on the side where the two baffles (62) are close to each other.

10. The sand flushing device according to any one of claims 5-9, characterized in that: The sand discharging component (6) also includes a collection box (67). The collection box (67) is removably arranged inside the collection box (61), and a handle (68) is arranged outside the collection box (67).

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