Water and soil loss protection device for power transmission and transformation line environmental protection

Abstract

The utility model relates to the technical field of water and soil loss protection, in particular to a water and soil loss protection device for power transmission and transformation line environmental protection, which comprises a base, a reservoir is arranged at the right part of the upper end of the base, a water storage clamping cover is movably inserted into the right part of the upper end of the base, and the water storage clamping cover is positioned right above the reservoir. And a through water inlet is formed in the left part of the upper end of the water storage clamping cover. According to the water and soil loss protection device for power transmission and transformation line environmental protection, the protection frame, the reinforcing insertion blocks, the expansion bolts and the like in the water and soil loss protection structure are connected with a slope, a slope protection net, a vegetation blanket and a soil layer in the soil protection assembly are used for preventing soil loss, and meanwhile, the water and soil loss protection device is convenient to use. Rainwater is filtered by the rainwater filtering assembly and then guided into the reservoir, reasonable utilization of water resources is achieved, the water and soil loss protection effect of the power transmission and transformation line is achieved jointly, the effectiveness of water and soil loss protection is further improved, the ecological environment is protected, and safe and stable operation of the power transmission and transformation line is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of soil and water conservation technology, and in particular to a soil and water conservation device for the environmental protection of power transmission and transformation lines. Background Technology

[0002] The construction of power transmission and transformation lines often involves large-scale land excavation and foundation construction. These activities pose a severe challenge to the surrounding environment, especially in terms of soil and water conservation. Soil erosion not only leads to a decline in soil fertility and water pollution, but may also exacerbate the risk of geological disasters such as landslides and debris flows. Therefore, the development and application of effective soil erosion protection devices are of great significance for protecting the ecological environment around power transmission and transformation lines. However, the geological, climatic, and vegetation conditions vary significantly in different regions, and existing protection devices often lack sufficient adaptability and are difficult to meet the protection needs in different environments. In addition, some engineering measures, such as drainage ditches and slope protection, require regular maintenance and cleaning to ensure their proper functioning. However, the maintenance costs of these measures are often high, and they require professional personnel to operate, increasing the management difficulty and expenses. Utility Model Content

[0003] The main purpose of this utility model is to provide a soil erosion protection device for power transmission and transformation lines, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A soil erosion protection device for power transmission and transformation lines includes a base, a water storage tank at the upper right end of the base, a water storage cover movably inserted into the upper right end of the base, the water storage cover being directly above the water storage tank, a through water inlet at the upper left end of the water storage cover, a drain pipe fixedly connected to the rear right end of the base, a slope fixedly connected to the upper left end of the base, two expansion threaded holes at the upper left end of the slope, a slot cavity at the upper right end of the expansion threaded holes, a soil erosion protection structure jointly provided at the upper and right ends of the slope, and a rainwater filtration component provided at the lower end of the soil erosion protection structure, the rainwater filtration component corresponding to the position of the water storage tank.

[0006] Preferably, the soil and water conservation structure includes a protective frame, with a through-hole for inserting blocks on the upper right side of the protective frame, into which reinforcing blocks are movably inserted. Two expansion bolts are threadedly connected to the upper left side of the protective frame, and screw holes are opened around the right side of the protective frame. A through-hole for rainwater drainage is opened on the lower right side of the protective frame. A soil protection component is threadedly connected to the protective frame through the four screw holes, and the soil protection component is located inside the protective frame.

[0007] By adopting the above technical solutions: the protective frame provides a stable structure for the entire device; the plug and reinforcing plug work together to enhance the frame's robustness; the expansion bolts ensure a tight connection between the protective frame and the ground, improving stability; the bolt holes facilitate the connection of soil protection components, effectively preventing soil erosion; the rainwater drain promptly discharges rainwater, preventing water accumulation from eroding the device and soil; and the various components work together to provide reliable protection for power transmission lines, reduce soil erosion, protect the ecological environment, and ensure the safe and stable operation of the lines.

[0008] Preferably, the protective frame is detachably connected to the ramp via two expansion bolts and two expansion threaded holes, the left end face of the protective frame is tightly abutted against but not fixed to the right end face of the base, and the reinforcing block is movably inserted into the slot cavity.

[0009] By adopting the above technical solution: the protective frame is connected to the slope with expansion bolts to ensure the stability of the device on the slope. The detachable connection facilitates installation and maintenance. The protective frame is tightly abutted against the base but not fixed, providing certain support without affecting their independence. The reinforcing plug is movably inserted into the slot cavity, further enhancing the stability of the protective frame and preventing it from shifting under the action of external factors. This combined use effectively prevents soil erosion on the slopes around the transmission and transformation lines, protects the line facilities and the ecological environment, and improves the reliability and practicality of the protective device.

[0010] Preferably, the soil protection component includes a polyester fiber slope protection net, with locking blocks fixedly connected to all four sides of the right end of the polyester fiber slope protection net, and fastening screws threadedly connected to the upper ends of the four locking blocks. A vegetation blanket is placed at the right end of the polyester fiber slope protection net, and a soil layer is placed at the right end of the vegetation blanket.

[0011] By adopting the above technical solution: the high strength of the polyester fiber slope protection net effectively prevents soil from sliding down, providing a foundation for subsequent protection; the combination of the locking blocks and fastening screws ensures that the slope protection net is firmly installed on the protective frame, enhancing stability; the vegetation blanket placed on the right side of the slope protection net further prevents soil erosion and promotes vegetation growth, restoring the ecology; the soil layer provides nutrients and a suitable environment for vegetation growth; and the synergistic effect of all components forms a multi-layered protection system, effectively protecting the slope soil around the transmission and transformation lines, reducing soil erosion, maintaining ecological balance, and ensuring the safe and stable operation of the lines.

[0012] Preferably, the polyester fiber slope protection net is located on the left side inside the protective frame and is tightly abutted against but not fixed to the right end face of the slope. The polyester fiber slope protection net is respectively snapped to the right end face of the protective frame by four fastening screws. The four fastening screws are respectively adapted to the size of four screw holes. The protective frame is detachably connected to the protective frame by four locking blocks and four fastening screws.

[0013] By adopting the above technical solution, the polyester fiber slope protection netting fits tightly against the slope, effectively blocking soil. Although not fixed, it is connected to the protective frame by fastening screws, enhancing stability. The fastening screws and screw holes are matched to ensure a firm connection. The locking blocks and fastening screws allow the protective frame and slope protection netting to be detachably connected, facilitating installation and maintenance. This combination not only plays a good protective role on the slopes around power transmission lines, preventing soil erosion, but also facilitates adjustment and replacement according to actual conditions, improving the flexibility and practicality of the protective device, and ensuring the safe and stable operation of the line and the surrounding ecological environment.

[0014] Preferably, the rainwater filtration assembly includes a drainage rectangular pipe, which is fixedly connected to the lower right side of the protective frame and located on the right side of the rainwater drain outlet. A through rectangular inlet is opened in the middle of the right end of the protective frame, and a filter screen is movably inserted into the rectangular inlet. A handle is fixedly connected to the middle of the right end of the filter screen.

[0015] By adopting the above technical solution: the drainage rectangular pipe is connected to the protective frame to ensure that rainwater is discharged smoothly. The rectangular socket facilitates the installation and removal of the filter screen, and the handle makes it easy to operate the filter screen. When rainwater flows through the rainwater drain of the protective frame and enters the drainage rectangular pipe, the filter screen can effectively filter impurities such as mud and sand in the rainwater, prevent blockage of the drainage system, and avoid impurities from polluting the surrounding environment.

[0016] Preferably, the drainage rectangular pipe is located directly above the water inlet, the drainage rectangular pipe is connected to the interior of the protective frame through the rainwater drain outlet, the drainage rectangular pipe is connected to the interior of the water storage tank through the water inlet, the area of ​​the drainage rectangular pipe is smaller than the area of ​​the water inlet, and the lower end face of the drainage rectangular pipe does not contact the upper end face of the water storage cover.

[0017] By adopting the above technical solution: the drainage rectangular pipe is located directly above the water inlet, ensuring that rainwater can accurately flow into the water storage tank. The rainwater drainage outlet is connected to the inside of the protective frame, allowing rainwater inside the protective frame to be discharged in a timely manner, preventing water accumulation from affecting the power transmission and transformation lines. The area of ​​the drainage rectangular pipe is smaller than that of the water inlet, facilitating the smooth flow of rainwater into the water storage tank. The lower end of the drainage rectangular pipe does not contact the water storage cover, preventing damage to the water storage cover and ensuring the normal use of the water storage tank. The overall coordination enables the protective device to collect and utilize rainwater while preventing soil erosion, thus improving resource utilization efficiency.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In this utility model, the protective frame is detachably connected to the slope, which is convenient for installation and maintenance and adapts to different terrains. The reinforcing blocks enhance the stability of the frame. In the soil protection component, the polyester fiber slope protection net blocks the soil from sliding down. The clips and fastening screws facilitate installation and disassembly, which is conducive to maintenance and replacement. The vegetation blanket and soil layer promote vegetation growth, further prevent soil erosion, beautify the environment, and the overall structure works together to provide reliable protection for power transmission and transformation lines, reduce the impact of soil erosion on the lines, protect the ecological environment, improve the practicality and reliability of the protective device, and ensure the safe and stable operation of the lines.

[0020] 2. In this utility model, the drainage rectangular pipe is securely connected to the protective frame, ensuring smooth rainwater discharge. The filter screen is movably connected via a rectangular socket, facilitating cleaning and replacement. It effectively filters impurities in rainwater, preventing blockage of the drainage system and avoiding impurities from entering the water storage tank and affecting water quality. The drainage rectangular pipe is located directly above the inlet and has a smaller area than the inlet, facilitating accurate flow of rainwater into the water storage tank and reducing the entry of debris. Furthermore, the lower end of the drainage rectangular pipe does not contact the water storage cover, preventing damage to the cover. Therefore, the overall components work together to achieve effective filtration and collection of rainwater, providing support for environmental protection and resource utilization. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a soil erosion prevention device for environmental protection of power transmission and transformation lines according to this utility model.

[0022] Figure 2 This is a schematic diagram of the overall soil erosion protection structure of a soil erosion protection device for environmental protection of power transmission and transformation lines according to this utility model.

[0023] Figure 3 This is a schematic diagram of the overall structure of the soil protection component of a soil erosion protection device for environmental protection of power transmission and transformation lines according to this utility model.

[0024] Figure 4This is a schematic diagram of the overall structure of the rainwater filtration component of a soil erosion prevention device for environmental protection of power transmission and transformation lines according to this utility model.

[0025] In the diagram: 1. Base; 2. Water storage tank; 3. Water storage cover; 4. Inlet; 5. Drainage pipe; 6. Slope; 7. Expansion threaded hole; 8. Slot cavity; 9. Soil and water conservation structure; 10. Rainwater filtration assembly; 91. Protective frame; 92. Insert block socket; 93. Reinforcing insert block; 94. Rainwater drain outlet; 95. Screw hole; 96. Expansion bolt; 97. Soil protection assembly; 101. Drainage rectangular pipe; 102. Rectangular socket; 103. Filter screen; 104. Handle; 971. Polyester fiber slope protection net; 972. Locking block; 973. Fastening screw; 974. Vegetation blanket; 975. Soil layer. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0027] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Please see Figure 1-4 This utility model provides a technical solution:

[0030] A soil erosion protection device for power transmission and transformation lines includes a base 1, a water storage tank 2 on the upper right side of the base 1, a water storage cover 3 movably inserted into the upper right side of the base 1, the water storage cover 3 being located directly above the water storage tank 2, a through water inlet 4 on the upper left side of the water storage cover 3, a drain pipe 5 fixedly connected to the rear right side of the base 1, a slope 6 fixedly connected to the upper left side of the base 1, two expansion threaded holes 7 on the upper left side of the slope 6, a slot cavity 8 on the upper right side of the expansion threaded holes 7, a soil erosion protection structure 9 jointly provided at the upper and right ends of the slope 6, and a rainwater filter assembly 10 provided at the lower end of the soil erosion protection structure 9, the rainwater filter assembly 10 corresponding to the position of the water storage tank 2.

[0031] In this embodiment, the soil and water conservation structure 9 includes a protective frame 91. A through-hole 92 is opened on the upper right side of the protective frame 91, and a reinforcing block 93 is movably inserted into the through-hole 92. Two expansion bolts 96 are threadedly connected to the upper left side of the protective frame 91. Screw holes 95 are opened around the right side of the protective frame 91. A through-hole 94 is opened on the lower right side of the protective frame 91. A soil protection component 97 is threadedly connected to the protective frame 91 through the four screw holes 95. The soil protection component 97 is located inside the protective frame 91. The protective frame 91 is detachably connected to the slope 6 through two expansion bolts 96 and two expansion threaded holes 7. The left end face of the protective frame 91 is tightly abutted against but not fixed to the right end face of the base 1. The reinforcing block 93 is movably inserted into the through-hole 92. Inside the cavity 8, the soil protection component 97 includes a polyester fiber slope protection net 971. Each of the four sides of the right end of the polyester fiber slope protection net 971 is fixedly connected with a locking block 972. Each of the four locking blocks 972 has a threaded fastening screw 973 at its upper end. A vegetation blanket 974 is placed at the right end of the polyester fiber slope protection net 971, and a soil layer 975 is placed at the right end of the vegetation blanket 974. The polyester fiber slope protection net 971 is located on the left side inside the protection frame 91 and is tightly but not fixed to the right end face of the slope 6. The polyester fiber slope protection net 971 is engaged with the right end face of the protection frame 91 by four fastening screws 973. The four fastening screws 973 are respectively adapted to the size of four screw holes 95. The protection frame 91 is detachably connected to the protection frame 91 by four locking blocks 972 and four fastening screws 973.

[0032] Through the above scheme: the protective frame 91 is detachably connected to the slope 6 via expansion bolts 96. This connection method allows the device to be installed and disassembled according to the actual conditions of different slopes 6, facilitating use in different environments. Simultaneously, the left end face of the protective frame 91 is tightly abutted against but not fixed to the base 1, increasing the flexibility of the device and enabling it to adapt to changes in different terrains. Secondly, the soil protection component 97 provides multiple possibilities for adapting to different environments. The soil protection component 97 includes a polyester fiber slope protection net 971, which has high strength, can adapt to different slopes and soil conditions, and is tightly abutted against but not fixed to the slope 6, allowing for adjustments based on actual conditions. The design of the adjustable position, locking block 972, and fastening screw 973 allows for detachable connection between the polyester fiber slope protection net 971 and the protective frame 91, facilitating replacement and maintenance. The vegetation blanket 974 can be selected according to different environments to adapt to different climates and soil conditions. The soil layer 975 can also be adjusted as needed, adding soil suitable for local vegetation growth to improve the survival rate of vegetation and enhance the protective effect. Therefore, this protective device, through its detachable connection and adjustable soil protection component 97, improves its adaptability to different environments and meets the protection needs under different conditions.

[0033] In this embodiment, the rainwater filtration assembly 10 includes a rectangular drainage pipe 101. The rectangular drainage pipe 101 is fixedly connected to the lower right side of the protective frame 91 and is located on the right side of the rainwater drain outlet 94. A rectangular through-hole 102 is opened in the middle of the right end of the protective frame 91. A filter screen 103 is movably inserted into the rectangular through-hole 102. A handle 104 is fixedly connected to the middle of the right end of the filter screen 103. The rectangular drainage pipe 101 is located directly above the water inlet 4. The rectangular drainage pipe 101 communicates with the interior of the protective frame 91 through the rainwater drain outlet 94. The rectangular drainage pipe 101 communicates with the interior of the water storage tank 2 through the water inlet 4. The area of ​​the rectangular drainage pipe 101 is smaller than the area of ​​the water inlet 4. The lower end face of the rectangular drainage pipe 101 does not contact the upper end face of the water storage cover 3.

[0034] Through the above solution: the drainage rectangular pipe 101 in the rainwater filter assembly 10 is fixedly connected to the protective frame 91, and its position is relatively fixed, reducing the need for frequent adjustments due to loosening or displacement of components. The drainage rectangular pipe 101 communicates with the interior of the protective frame 91 through the rainwater drain outlet 94, ensuring smooth drainage of rainwater and preventing water accumulation from damaging the protective device, thus reducing maintenance needs caused by water accumulation. Secondly, a through rectangular insertion port 102 is opened in the middle of the right end of the protective frame 91, and a filter screen 103 is movably inserted into the rectangular insertion port 102. When the filter screen 103 needs to be cleaned, it can be easily pulled out through the handle 104. The filter screen 103 can be cleaned or replaced easily. This design makes maintenance simple and convenient, requiring no professional personnel, thus reducing maintenance costs and management difficulty. At the same time, the area of ​​the drainage rectangular pipe 101 is smaller than that of the water inlet 4, which reduces the amount of debris entering the water pipe and lowers the risk of blockage, thereby reducing maintenance frequency. The lower end face of the drainage rectangular pipe 101 does not contact the upper end face of the water storage cover 3, avoiding damage to the water storage cover 3 and reducing repair costs caused by damage to the water storage facility. Therefore, the overall accessories work together to reduce maintenance costs and management difficulty, and improve the practicality and economy of the protective device.

[0035] It should be noted that this utility model is a soil erosion protection device for power transmission and transformation lines. During use, the protective frame 91 is detachably connected to the slope 6 via two expansion bolts 96 and two expansion threaded holes 7. This connection method ensures the stability of the protective device on the slope 6 surrounding the power transmission and transformation line, and facilitates installation and disassembly, making it convenient for operation during the construction and maintenance of the power transmission and transformation line. The left end face of the protective frame 91 is tightly abutted against but not fixed to the right end face of the base 1, providing a certain level of protection for the power transmission and transformation facilities without affecting... The normal operation and maintenance of transmission and transformation lines, with the reinforcing plug 93 movably inserted into the slot cavity 8, further enhances the stability of the protective frame 91, ensuring reliable protection for the transmission and transformation lines under various environmental conditions, reducing soil erosion and the impact of rainwater on transmission and transformation facilities. The soil protection component 97 includes a polyester fiber slope protection net 971, which effectively blocks soil particles from sliding down, preventing soil loss into the surrounding environment and reducing damage to the surrounding ecology. Simultaneously, the installation of vegetation blanket 974 and soil layer 975 provides conditions for vegetation growth. The growth of vegetation not only further stabilizes the soil but also beautifies the environment, increases biodiversity, and plays a positive role in environmental protection. When rainwater falls into the protected area, the protective frame 91 acts as a preliminary guide, directing rainwater through the rainwater drain 94 at the lower right end of the protective frame 91 into the rectangular drainage pipe 101. Since the rectangular drainage pipe 101 is located directly above the inlet 4 and is connected to the inside of the storage tank 2 through the inlet 4, rainwater can flow smoothly into the storage tank 2 for storage. The area of ​​the rectangular drainage pipe 101 is smaller than the area of ​​the inlet 4, which reduces impurities. The possibility of debris entering the water storage tank 2 is reduced. In addition, a rectangular inlet 102 is provided at the middle of the right end of the protective frame 91. A filter screen 103 is movably inserted into the rectangular inlet 102. The filter screen 103 can be easily cleaned and maintained by the handle 104. The filter screen 103 can filter impurities in rainwater, prevent blockage of the drainage system, and ensure that rainwater flows smoothly into the water storage tank 2, thereby achieving effective protection and utilization of water resources. In summary, this protective device, through reasonable design, reduces maintenance costs and management difficulty, and improves the practicality and economy of the protective device.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A soil erosion protection device for power transmission and transformation lines, comprising a base (1), characterized in that: A water storage tank (2) is provided on the upper right side of the base (1). A water storage cover (3) is movably inserted into the upper right side of the base (1). The water storage cover (3) is located directly above the water storage tank (2). A through water inlet (4) is provided on the upper left side of the water storage cover (3). A drain pipe (5) is fixedly connected to the rear right side of the base (1). A slope (6) is fixedly connected to the upper left side of the base (1). Two expansion threaded holes (7) are provided on the upper left side of the slope (6). A slot cavity (8) is provided on the upper right side of the expansion threaded holes (7). A soil and water loss protection structure (9) is provided on both the upper and right sides of the slope (6). A rainwater filter assembly (10) is provided at the lower end of the soil and water loss protection structure (9). The position of the rainwater filter assembly (10) corresponds to that of the water storage tank (2).

2. The soil erosion protection device for power transmission and transformation lines according to claim 1, characterized in that: The soil and water conservation structure (9) includes a protective frame (91). The upper right side of the protective frame (91) has a through-hole (92) for inserting a reinforcing insert (93) that is movably inserted into the through-hole (92). The upper left side of the protective frame (91) is threadedly connected to two expansion bolts (96). The right side of the protective frame (91) has screw holes (95) around it. The lower right side of the protective frame (91) has a through-hole (94) for draining rainwater. The protective frame (91) is threadedly connected to a soil protection component (97) through four screw holes (95). The soil protection component (97) is located inside the protective frame (91).

3. A soil erosion protection device for power transmission and transformation lines according to claim 2, characterized in that: The protective frame (91) is detachably connected to the ramp (6) by two expansion bolts (96) and two expansion threaded holes (7). The left end face of the protective frame (91) is tightly abutted against the right end face of the base (1) but not fixed. The reinforcing plug (93) is movably inserted into the slot cavity (8).

4. A soil erosion protection device for power transmission and transformation lines according to claim 2, characterized in that: The soil protection component (97) includes a polyester fiber slope protection net (971). The right end of the polyester fiber slope protection net (971) is fixedly connected with four locking blocks (972). The upper ends of the four locking blocks (972) are threadedly connected with fastening screws (973). A vegetation blanket (974) is placed on the right end of the polyester fiber slope protection net (971), and a soil layer (975) is placed on the right end of the vegetation blanket (974).

5. A soil erosion protection device for power transmission and transformation lines according to claim 4, characterized in that: The polyester fiber slope protection net (971) is located inside the left part of the protective frame (91) and is close to but not fixed to the right end face of the slope (6). The polyester fiber slope protection net (971) is connected to the right end face of the protective frame (91) by four fastening screws (973). The four fastening screws (973) are respectively adapted to the size of four screw holes (95). The protective frame (91) is detachably connected to the protective frame (91) by four clips (972) and four fastening screws (973).

6. A soil erosion protection device for power transmission and transformation lines according to claim 1, characterized in that: The rainwater filtration assembly (10) includes a drainage rectangular pipe (101), which is fixedly connected to the lower right side of the protective frame (91) and located on the right side of the rainwater drain (94). A through rectangular inlet (102) is opened in the middle of the right end of the protective frame (91), and a filter screen (103) is movably inserted into the rectangular inlet (102). A handle (104) is fixedly connected to the middle of the right end of the filter screen (103).

7. A soil erosion protection device for power transmission and transformation lines according to claim 6, characterized in that: The drainage rectangular pipe (101) is located directly above the water inlet (4). The drainage rectangular pipe (101) is connected to the interior of the protective frame (91) through the rainwater drain (94). The drainage rectangular pipe (101) is connected to the interior of the water storage tank (2) through the water inlet (4). The area of ​​the drainage rectangular pipe (101) is smaller than the area of ​​the water inlet (4). The lower end face of the drainage rectangular pipe (101) does not contact the upper end face of the water storage cover (3).

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