A pipe drainage device

Abstract

This application discloses a pipeline drainage device, comprising: a drain pipe with a drain outlet; an outer pipe connected to the drain pipe, having a first inlet; an inner pipe connected to the drain pipe and located inside the outer pipe, having a second inlet; and a drive assembly configured to drive the outer and inner pipes to rotate relative to each other, thereby switching between the second and first inlets being offset from each other and overlapping. Applying this application only requires driving the inner and outer pipes to rotate relative to each other via the drive assembly; the space occupied by the inner and outer pipes remains unchanged. Therefore, this pipeline drainage device is more compact and occupies less space compared to existing sluice gate solutions. Furthermore, debris is almost impossible to accumulate on the inner wall of the first or second inlet, thus reducing the risk of debris blockage or clogging. Additionally, this pipeline drainage device allows for precise control of the drainage speed.

Description

Technical Field

[0001] This application relates to the field of farmland drainage devices, specifically to a pipeline drainage device. Background Technology

[0002] Farmland drainage systems are crucial for controlling water depth in farmland. Existing systems typically employ lift-type sluice gates, tilt-type sluice gates, or fixed drainage pipes. Fixed drainage pipe systems require manual operation to open and close the water-blocking components at the pipe opening, which is unsuitable for the current trend towards smart farmland development. Lift-type and tilt-type sluice gates use motors to raise or lower the gates to open and close the drainage channel; however, their large operating range requires significant space, necessitating larger installation structures (such as cement bases), leading to complex construction and higher costs. Furthermore, farmland debris such as soil, stones, or cement and lime used during grouting may travel along the sluice gate's path, causing blockages and other problems during operation. Utility Model Content

[0003] This application aims to address one of the technical problems in related technologies to a certain extent. Therefore, this application provides a pipe drainage device.

[0004] To achieve the above objectives, this application adopts the following technical solution: a pipeline drainage device, comprising:

[0005] A drain pipe, which has a drain outlet;

[0006] An outer pipe, which is connected to the drain pipe, is provided with a first inlet; and,

[0007] An inner pipe, which is connected to the drain pipe and located inside the outer pipe, has a second water inlet;

[0008] A drive assembly is configured to drive the outer tube and the inner tube to rotate relative to each other, so that the second inlet and the first inlet switch between being offset from each other and overlapping each other.

[0009] The application of this application has the following beneficial effects: When in use, this pipeline drainage device only requires driving the inner and outer pipes to rotate relative to each other via a drive component. The space occupied by the inner and outer pipes remains unchanged. Therefore, compared to existing sluice gate solutions, this pipeline drainage device is more compact and occupies less space. Simultaneously, debris is almost impossible to accumulate on the inner walls of the first or second inlet (the area is too small for debris to accumulate), thus reducing the likelihood of debris jamming or clogging. Furthermore, by driving the inner and outer pipes to rotate relative to each other, the first and second inlets can be switched between being offset and overlapping. It is easy to understand that the overlapping area when they overlap can also be adjusted. Therefore, the drainage speed can be precisely controlled.

[0010] Optionally, the bottom end of the outer pipe is fixed to the drain pipe, the inner pipe slides circumferentially with the outer pipe, and the output end of the drive assembly is connected to the inner pipe. This structural arrangement facilitates the assembly of the drain pipe, outer pipe, and inner pipe, while also reducing the need for sealing between the outer pipe and the drain pipe.

[0011] Optionally, the pipe drainage device further includes a sealing structure disposed between the inner pipe and the outer pipe, the sealing structure being disposed around the first water inlet and used to prevent water from seeping from the first water inlet into the gap between the inner pipe and the outer pipe.

[0012] Optionally, the sealing structure includes a first elastic sealing cover, a second elastic sealing cover, and a first rigid cover. Each of the first elastic sealing cover, the second elastic sealing cover, and the first rigid cover has an opening adapted to the first water inlet. The first elastic sealing cover is disposed at the first water inlet, fitting against the inner wall of the first water inlet and slidingly engaging with the inner tube circumferentially. The first rigid cover is fixed to the outer tube by screws and presses the second elastic sealing cover against the outer tube. The second elastic sealing cover partially fits against the first elastic sealing cover. Alternatively, the sealing structure includes... An elastic sealing cylinder with a notched groove is formed, wherein the inner wall of the elastic sealing cylinder is fitted with the inner tube and the outer wall is fitted with the outer tube, and the elastic sealing cylinder is provided with an opening adapted to the first water inlet; or, the sealing structure includes a third elastic sealing cover and a second rigid cover, wherein the opening size of the first water inlet is larger than the opening size of the second water inlet, so that the inner tube always has a pressure-bearing part exposed to the outside through the first water inlet, the third elastic sealing cover is disposed inside the first water inlet, and the second rigid cover is locked and fixed to the outer tube by screws and presses the third elastic sealing cover into the pressure-bearing part.

[0013] Optionally, the pipe drainage device further includes a scraper fixedly mounted on the outer pipe. The scraper has a scraping portion extending into the first inlet, which slides with the inner pipe and abuts against the sealing structure circumferentially. During the rotation of the inner pipe relative to the outer pipe, the scraper can rotate relative to the inner pipe, scraping away mud and sand from the surface of the inner pipe. This prevents mud and sand from being squeezed between the inner and outer pipes as the inner pipe rotates, thus avoiding wear on both pipes and extending the device's lifespan.

[0014] Optionally, the pipe drainage device further includes an annular isolator, which is fixedly installed on the inner pipe and sleeved on the outside of the inner pipe. The outer ring of the annular isolator slides circumferentially with the inner wall of the outer pipe. By setting the annular isolator, the stability of the inner pipe's rotation relative to the outer pipe can be improved, preventing the inner pipe from shaking during rotation.

[0015] Optionally, the pipeline drainage device further includes a control unit and a detection element. Both the drive assembly and the detection element are electrically connected to the control unit. The control unit can acquire water level data through the detection element and control the drive assembly to operate based on the water level data. By setting up the detection element and control unit, automated control of the drive assembly can be achieved, thereby enabling the pipeline drainage device to operate automatically and improving work efficiency.

[0016] Optionally, the pipe drainage device further includes a fixed mounting base, which includes a bottom wall, a left side wall, a right side wall, and a rear wall. The bottom wall, left side wall, right side wall, and rear wall enclose a mounting cavity and form a water inlet opening communicating with the mounting cavity. The drain pipe, outer pipe, and inner pipe are all disposed in the mounting cavity, and the drain outlet extends out from the rear wall.

[0017] Optionally, the first water inlet is provided in one set and faces the water inlet opening; or, the first water inlet is provided in two sets, and the two sets of the first water inlet face the left side wall and the right side wall respectively.

[0018] Optionally, the pipe drainage device further includes a filter screen disposed on the fixed mounting base, the filter screen being located at the water inlet. By setting up the filter screen, impurities can be prevented from flowing into the mounting cavity, further reducing the probability of pipe blockage.

[0019] These features and advantages of this application will be disclosed in detail in the following specific embodiments and accompanying drawings. The best embodiments or means of this application will be shown in detail in conjunction with the accompanying drawings, but are not intended to limit the technical solutions of this application. In addition, each of these features, elements and components appearing in the following text and drawings is multiple and is labeled with different symbols or numbers for convenience, but all represent parts with the same or similar structure or function. Attached Figure Description

[0020] The following description, in conjunction with the accompanying drawings, further illustrates this application:

[0021] Figure 1 This is a schematic diagram of the structure of a pipeline drainage device provided in Embodiment 1 of this application;

[0022] Figure 2 This is a schematic diagram of the pipe drainage device from another perspective after the drive motor has been removed in Embodiment 1;

[0023] Figure 3 This is an exploded view of the outer and inner tubes in Example 1;

[0024] Figure 4 This is an exploded view of the outer tube and sealing structure in Example 1;

[0025] Figure 5 This is a cross-sectional view of the pipe drainage device in Embodiment 1;

[0026] Figure 6 This is a schematic diagram of a pipe drainage device provided in Embodiment 2 of this application;

[0027] Figure 7 This is an exploded view of the outer and inner tubes in Example 2;

[0028] Figure 8 This is a schematic diagram of a pipe drainage device provided in Embodiment 3 of this application;

[0029] Figure 9 This is an exploded view of the outer tube, inner tube, and sealing structure in Example 3;

[0030] Figure 10 This is an exploded view of the outer tube, inner tube, and sealing structure in Example 3.

[0031] The components include: 1. Drain pipe; 10. Drain outlet; 2. Outer pipe; 20. First inlet; 3. Inner pipe; 30. Second inlet; 31. Pressure-bearing part; 4. Drive assembly; 40. Drive motor; 41. Photovoltaic panel; 42. Connecting frame; 5. Sealing structure; 50. First elastic sealing cover; 51. Second elastic sealing cover; 52. First rigid cover; 53. Elastic sealing cylinder; 54. Third elastic sealing cover; 55. Second rigid cover; 6. Sludge scraper; 60. Connecting part; 61. Sludge scraping part; 7. Annular isolation piece; 8. Fixed mounting base; 80. Bottom wall; 81. Left side wall; 82. Right side wall; 83. Rear wall; 84. Mounting cavity; 9. Filter screen. Detailed Implementation

[0032] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain this application and should not be construed as limiting it.

[0033] The terms "an embodiment," "example," or "example" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this application. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0034] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected," "linked," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a connection through an intermediary, or a connection within two elements or an interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] Example 1: This example provides a pipe drainage device, such as... Figure 1 , Figure 2 and Figure 3 As shown, the pipe drainage device includes a drain pipe 1, an outer pipe 2, an inner pipe 3, and a drive assembly 4. The drain pipe 1 has a drain outlet 10. The outer pipe 2 is connected to the drain pipe 1 and has a first inlet 20. The inner pipe 3 is connected to the drain pipe 1 and located inside the outer pipe 2, and has a second inlet 30. The drive assembly 4 is configured to drive the outer pipe 2 and the inner pipe 3 to rotate relative to each other, so that the second inlet 30 and the first inlet 20 switch between being offset from each other and overlapping.

[0037] In application, this pipeline drainage device only requires the drive component 4 to rotate the inner pipe 3 and outer pipe 2 relative to each other. The space occupied by the inner pipe 3 and outer pipe 2 remains unchanged. Therefore, this pipeline drainage device is more compact and occupies less space compared to existing sluice gate solutions. Simultaneously, debris can hardly accumulate on the inner walls of the first inlet 20 or the second inlet 30 (the area is too small for debris to accumulate), thus reducing the likelihood of debris blockage or clogging. Furthermore, by driving the inner pipe 3 and outer pipe 2 to rotate relative to each other, the first inlet 20 and the second inlet 30 can be switched between being offset from each other and overlapping. It is easy to understand that the overlapping area when they overlap can also be adjusted. Thus, the drainage speed can be precisely controlled.

[0038] Furthermore, in this embodiment, the bottom end of the outer tube 2 is fixed to the drain pipe 1, the inner tube 3 slides circumferentially with the outer tube 2, and the output end of the drive assembly 4 is connected to the inner tube 3. This structural arrangement facilitates the assembly of the drain pipe 1, the outer tube 2, and the inner tube 3, while also reducing the need for sealing between the outer tube 2 and the drain pipe 1. Specifically, in this embodiment, the outer tube 2 and the drain pipe 1 are tightly fitted together, or the outer tube 2 and the drain pipe 1 can be integrally molded.

[0039] The drive assembly 4 in this embodiment includes a drive motor 40, a photovoltaic panel 41, and a connecting frame 42. The output end of the drive motor 40 is keyed to the connecting frame 42, which is fixedly connected to the upper end of the inner tube 3 by screws. The photovoltaic panel 41 is electrically connected to the drive motor 40 to supply power to the drive motor 40. When the drive motor 40 is working, it can drive the inner tube 3 to rotate through the connecting frame 42, thereby causing the inner tube 3 and the outer tube 2 to rotate relative to each other, so that the second water inlet 30 and the first water inlet 20 can switch between being offset from each other and overlapping each other.

[0040] It is readily understood that in other alternative embodiments, the output end of the drive motor 40 can also be connected to the outer pipe 2, and the inner pipe 3 can be fixedly installed to the drain pipe 1. In this solution, the outer pipe 2 needs to be designed to rotate relative to the drain pipe 1, therefore a seal needs to be added between the outer pipe 2 and the drain pipe 1.

[0041] Combination Figure 4 and Figure 5 As shown, to prevent water from seeping into the drain pipe 1 from between the inner pipe 3 and the outer pipe 2 when the first inlet 20 and the second inlet 30 are staggered, the pipe drainage device provided in this embodiment also includes a sealing structure 5 disposed between the inner pipe 3 and the outer pipe 2. The sealing structure 5 ensures good sealing performance between the inner pipe 3 and the outer pipe 2. The sealing structure 5 is disposed around the first inlet 20 and is used to prevent water from seeping into the gap between the inner pipe 3 and the outer pipe 2 from the first inlet 20.

[0042] Specifically, the sealing structure 5 in this embodiment includes a first elastic sealing cover 50, a second elastic sealing cover 51, and a first rigid cover 52. Each of these three covers has an opening adapted to the first water inlet 20. The first elastic sealing cover 50 is disposed at the first water inlet 20, fitting snugly against the inner wall of the first water inlet 20, and slidingly engaging with the inner tube 3 circumferentially. The first rigid cover 52 is fixed to the outer tube 2 by screws, pressing the second elastic sealing cover 51 against the outer tube 2, with a portion of the second elastic sealing cover 51 fitting snugly against the first elastic sealing cover 50. That is, the first elastic sealing cover 50 is compressed and confined by the interaction of the outer wall surface of the inner tube 3, the inner ring surface of the second elastic sealing cover 51, and the inner wall surface of the first water inlet 20, thus maintaining the first elastic sealing cover 50 within the first water inlet 20 and achieving a first layer of sealing between the inner tube 3 and the outer tube 2. Furthermore, a portion of the second elastic sealing cover 51 will abut against the outer wall of the outer tube 2, achieving a second seal between the outer tube 2 and the first elastic sealing cover 50. In this embodiment, screws are used to lock and fix the second elastic sealing cover 51 and the first rigid cover 52 onto the outer tube 2. In this embodiment, the first rigid cover 52 is made of stainless steel, but other metals or hard plastic materials can also be selected. In this embodiment, the first elastic sealing cover 50 and the second elastic sealing cover 51 are made of rubber or silicone.

[0043] Furthermore, combining Figure 4 and Figure 5As shown, the pipe drainage device provided in this embodiment also includes a scraper 6 fixedly installed on the outer pipe 2. The scraper 6 has a scraping part 61 extending into the first inlet 20. The scraping part 61 slides with the inner pipe 3 and abuts against the sealing structure 5 circumferentially. During the rotation of the inner pipe 3 relative to the outer pipe 2, the scraper 6 can rotate relative to the inner pipe 3. The scraper 6 can scrape away the mud and sand on the surface of the inner pipe 3, preventing the mud and sand from being squeezed into the space between the inner pipe 3 and the outer pipe 2 as the inner pipe 3 rotates, thereby avoiding wear on the inner pipe 3 and the outer pipe 2 and improving the life of the device. In addition, the scraper 6 in this embodiment also includes a connecting part 60. The scraper 6 is locked and fixed to the outer pipe 2 by screws passing through the connecting part 60. At the same time, the screws passing through the connecting part 60 also pass through the first rigid cover 52 and the second elastic sealing cover 51. As mentioned above, in this embodiment, the sludge scraper 61 extends into the first water inlet 20. Therefore, the sludge scraper 61 will inevitably come into contact with the first elastic sealing cover 50 located within the first water inlet 20. Consequently, the sludge scraper 61 can restrict the first elastic sealing cover 50 circumferentially. When the inner tube 3 rotates relative to the outer tube 2, the outer wall of the inner tube 3 rubs against the first elastic sealing cover 50. The restrictive effect of the sludge scraper 61 on the first elastic sealing cover 50 can limit the circumferential movement of the first elastic sealing cover 50 and also limit its circumferential deformation.

[0044] Because the first elastic sealing cover 50 slides with the inner tube 3, it is inevitable that a certain gap will be created between the inner tube 3 and the outer tube 2. To prevent the inner tube 3 from wobbling significantly relative to the outer tube 2, combined with... Figure 3 and Figure 5 As shown, the pipe drainage device provided in this embodiment also includes an annular spacer 7. The annular spacer 7 is fixedly installed on the inner pipe 3 and sleeved on the outside of the inner pipe 3. The outer ring of the annular spacer 7 slides circumferentially with the inner wall of the outer pipe 2. By setting the annular spacer 7, the stability of the rotation of the inner pipe 3 relative to the outer pipe 2 can be improved, preventing the inner pipe 3 from shaking during rotation. Specifically, in this embodiment, the annular spacer 7 is a collar, and mounting grooves are provided at the upper end, lower end, and middle of the inner pipe 3. The annular spacer 7 is inserted into the mounting grooves. It is easy to understand that in other optional embodiments, the annular spacer 7 can also be a bushing, which can be tightly fitted onto the outside of the inner pipe 3.

[0045] To achieve automated control, the pipeline drainage device provided in this embodiment also includes a control unit and a detection element. Both the drive assembly 4 and the detection element are electrically connected to the control unit. The control unit can acquire water level data through the detection element and control the drive assembly 4 to operate based on the water level data. By setting up the detection element and the control unit, automated control of the drive assembly 4 can be achieved, thereby enabling the pipeline drainage device to operate automatically and improving work efficiency.

[0046] like Figure 1 and Figure 2 As shown, the pipe drainage device provided in this embodiment also includes a fixed mounting base 8. The fixed mounting base 8 includes a bottom wall 80, a left side wall 81, a right side wall 82, and a rear wall 83. The bottom wall 80, left side wall 81, right side wall 82, and rear wall 83 enclose a mounting cavity 84 and form a water inlet opening communicating with the mounting cavity 84. The drain pipe 1, outer pipe 2, and inner pipe 3 are all disposed within the mounting cavity 84, and the drain outlet 10 extends from the rear wall 83. The fixed mounting base 8 facilitates assembly of the pipe drainage device at the factory, reducing assembly difficulty in farmland, and ensuring the stability of the drive assembly 4, drain pipe 1, outer pipe 2, and inner pipe 3. Furthermore, the pipe drainage device also includes a filter screen 9 disposed on the fixed mounting base 8, located at the water inlet opening. By setting the filter screen 9, impurities can be prevented from entering the mounting cavity 84, further reducing the probability of pipe blockage.

[0047] In this embodiment, a set of first inlets 20 is provided and faces the inlet opening, so that water can flow directly to the first inlets 20 during drainage. It is easy to understand that a set of first inlets 20 can be provided with multiple inlets. Generally, in a set of first inlets 20, the upper end of the first inlet 20 is close to the upper part of the outer pipe 2, and the lower end of the first inlet 20 is close to the lower part of the outer pipe 2. This ensures that drainage can be carried out normally when facing different water storage heights.

[0048] Example 2: This example also provides a pipe drainage device, such as... Figure 6 and Figure 7 As shown, the difference between this embodiment and Embodiment 1 is that the first water inlet 20 in this embodiment is provided in two sets, and the two sets of first water inlets 20 are respectively facing the left side wall 81 and the right side wall 82 of the fixed mounting base 8.

[0049] With all drain outlets 10 of the drain pipe 1 having the same size, in Embodiment 1, the first inlet 20 is designed to face the inlet opening directly, facilitating the direct flow of water to the first inlet 20 for faster outflow and prioritizing the drainage speed requirement. In this embodiment, the first inlet 20 is set to face the left side wall 81 and the right side wall 82, allowing the water to enter tangentially, which reduces the direct impact of the water flow on the outer pipe 2 and inner pipe 3. It may also create turbulence, which helps to slow down the water flow velocity and promote sediment settling, thereby reducing the probability of blockage and extending the service life of the outer pipe 2 and inner pipe 3.

[0050] Example 3: This example also provides a pipe drainage device, such as... Figure 8 and Figure 9As shown, the difference between this embodiment and Embodiment 1 lies in the sealing structure 5, which differs from that in Embodiment 1. Specifically, the sealing structure 5 in this embodiment includes an elastic sealing cylinder 53 with a notched groove. The inner wall of the elastic sealing cylinder 53 is fitted to the inner tube 3, and the outer wall is fitted to the outer tube 2. The elastic sealing cylinder 53 is provided with an opening adapted to the first water inlet 20. To ensure good stability of the elastic sealing cylinder 53 relative to the outer tube 2, the elastic sealing cylinder 53 in this embodiment is made of foamed cotton. Additionally, a scraper 6 is also provided in this embodiment, and the scraping part 61 of the scraper 6 can be used to restrict the elastic sealing cylinder 53.

[0051] Example 4: This example also provides a pipe drainage device, such as... Figure 10 As shown, the difference between this embodiment and Embodiments 1 and 3 lies in the sealing structure 5, which differs from that in Embodiment 1. Specifically, the sealing structure 5 in this embodiment includes a third elastic sealing cover 54 and a second rigid cover 55. Furthermore, the opening size of the first inlet 20 in this embodiment is larger than the opening size of the second inlet 30, ensuring that the inner tube 3 always has a pressure-bearing portion 31 exposed through the first inlet 20. The third elastic sealing cover 54 is disposed within the first inlet 20, and the second rigid cover 55 is fixed to the outer tube 2 by screws, pressing the third elastic sealing cover 54 into the pressure-bearing portion 31. That is, when the inner tube 3 rotates to any position relative to the outer tube 2, the inner tube 3 always has a pressure-bearing portion 31 exposed through the first inlet 20. By utilizing the cooperation of the second rigid cover 55 with the pressure-bearing portion 31, the third elastic sealing cover 54 can be positioned and clamped at the inner ring surface of the first inlet 20, thereby achieving a good sealing effect.

[0052] In this embodiment, the second rigid cover 55 is made of stainless steel, but other metals or hard plastic materials can also be selected. The third elastic sealing cover 54 in this embodiment is made of rubber or silicone. Additionally, in this embodiment, the scraper 6 as described in Embodiment 1 can also be selected.

[0053] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Those skilled in the art should understand that this application includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this application will be included within the scope of the claims.

Claims

1. A pipe drainage device, characterized in that, include: Drainage pipe (1), which has a drain outlet (10); An outer pipe (2) is connected to the drain pipe (1), and the outer pipe (2) has a first inlet (20); and, The inner pipe (3) is connected to the drain pipe (1) and located inside the outer pipe (2), and the inner pipe (3) is provided with a second water inlet (30); The drive assembly (4) is configured to drive the outer tube (2) and the inner tube (3) to rotate relative to each other, so that the second inlet (30) and the first inlet (20) switch between being offset from each other and overlapping each other.

2. The pipe drainage device as described in claim 1, characterized in that, The bottom end of the outer pipe (2) is fixed to the drain pipe (1), the inner pipe (3) slides in circumferentially with the outer pipe (2), and the output end of the drive assembly (4) is connected to the inner pipe (3).

3. The pipe drainage device as described in claim 2, characterized in that, The pipe drainage device also includes a sealing structure (5) disposed between the inner pipe (3) and the outer pipe (2). The sealing structure (5) is disposed around the first water inlet (20) and is used to prevent water from seeping from the first water inlet (20) into the gap between the inner pipe (3) and the outer pipe (2).

4. The pipe drainage device as described in claim 3, characterized in that, The sealing structure (5) includes a first elastic sealing cover (50), a second elastic sealing cover (51), and a first rigid cover (52). The first elastic sealing cover (50), the second elastic sealing cover (51), and the first rigid cover (52) are all provided with openings that are adapted to the first water inlet (20). The first elastic sealing cover (50) is disposed at the first water inlet (20). The first elastic sealing cover (50) is in contact with the inner wall of the first water inlet (20) and slides in circumferentially with the inner tube (3). The first rigid cover (52) is fixed to the outer tube (2) by screws and presses the second elastic sealing cover (51) onto the outer tube (2). The second elastic sealing cover (51) is partially in contact with the first elastic sealing cover (50). Alternatively, the sealing structure (5) includes an elastic sealing cylinder (53) with a notched groove, the inner wall of the elastic sealing cylinder (53) being fitted with the inner tube (3) and the outer wall being fitted with the outer tube (2), and the elastic sealing cylinder (53) being provided with an opening adapted to the first water inlet (20). Alternatively, the sealing structure (5) includes a third elastic sealing cover (54) and a second rigid cover (55). The opening size of the first water inlet (20) is larger than the opening size of the second water inlet (30), so that the inner tube (3) always has a pressure-bearing part (31) exposed through the first water inlet (20). The third elastic sealing cover (54) is disposed inside the first water inlet (20), and the second rigid cover (55) is fixed to the outer tube (2) by screws and presses the third elastic sealing cover (54) into the pressure-bearing part (31).

5. The pipe drainage device as described in claim 3, characterized in that, The pipe drainage device also includes a scraper (6) fixedly installed on the outer pipe (2). The scraper (6) has a scraping part (61) extending into the first water inlet (20). The scraping part (61) slides with the inner pipe (3) and abuts against the sealing structure (5) in the circumferential direction.

6. The pipe drainage device as described in claim 1, characterized in that, The pipe drainage device also includes an annular isolation element (7), which is fixedly installed on the inner pipe (3) and sleeved on the outside of the inner pipe (3). The outer ring of the annular isolation element (7) slides in circumferentially with the inner wall of the outer pipe (2).

7. The pipe drainage device as described in claim 1, characterized in that, The pipeline drainage device also includes a control unit and a detection element. The drive assembly (4) and the detection element are both electrically connected to the control unit. The control unit can obtain water level data through the detection element and control the drive assembly (4) to work according to the water level data.

8. The pipe drainage device as described in any one of claims 1 to 7, characterized in that, The pipe drainage device also includes a fixed mounting base (8), which includes a bottom wall (80), a left side wall (81), a right side wall (82), and a rear wall (83). The bottom wall (80), left side wall (81), right side wall (82), and rear wall (83) enclose a mounting cavity (84) and have a water inlet opening communicating with the mounting cavity (84). The drain pipe (1), outer pipe (2), and inner pipe (3) are all located in the mounting cavity (84), and the drain outlet (10) extends out from the rear wall (83).

9. The pipe drainage device as described in claim 8, characterized in that, The first water inlet (20) is provided with a set of inlets that are directly opposite the water inlet opening; Alternatively, the first water inlet (20) may be provided in two sets, and the two sets of the first water inlet (20) may be directly opposite the left side wall (81) and the right side wall (82), respectively.

10. The pipe drainage device as described in claim 8, characterized in that, The pipe drainage device also includes a filter screen (9) disposed on the fixed mounting base (8), and the filter screen (9) is located at the water inlet.

Images