Drainage pipe structure

Abstract

The present invention discloses a drainage pipe structure, including a lower drainage pipe and a drainage trough, a dense separation net is provided in the drainage trough, a drainage cover and a large-pore soft filter are provided in the lower drainage pipe, the drainage cover is hinged with the drainage trough, a positioning groove is provided on the drainage cover, a pipe wall small hole, a horizontal positioning rod and an outer seat are provided on the side wall of the lower drainage pipe, an outer gear is provided on the outer seat, a horizontal rack is provided on the horizontal positioning rod, a large floating block, a small floating block, a baffle, a vertical rotation rod, a support plate and a wire pipe are provided in the special drainage cavity, a vertical positioning rod is provided at the bottom of the large floating block, a vertical rack is provided at the lower end of the vertical positioning rod, and the small floating block is connected to the vertical rotation rod through a rotating rod pull line. The beneficial effect of the present invention is that during normal drainage, the collection and drainage of rainwater on the roof can be smoothly realized under the premise of blocking large-volume obstructions. When there are many or suspected many obstructions, the rapid drainage function can be turned on, which can avoid poor drainage caused by blockage and automatically transfer and collect obstructions to ensure the smoothness of subsequent drainage.

Description

Technical Field

[0001] The invention belongs to the technical field of pipelines and municipal water supply and drainage, and in particular relates to a drainage pipeline structure. Background Art

[0002] The drainage system (pipeline) of civil buildings is mainly used to deal with drainage problems on rainy days. The drainage system of civil buildings usually includes a waterway (such as a gutter) installed on the roof, a water collection structure (such as a rain gutter) connected to the waterway (or installed in the waterway itself), a grille drain installed on the water collection structure, and a drainage pipe (such as a rainwater pipe) connected to the water collection structure. The drainage pipe is connected to the sewer or sewage well. Among them, PVC rainwater pipes are mostly used for drainage pipes, and the common diameters are 50mm, 75 mm, 100 mm, 125 mm, 150 mm or 200 mm. In view of the huge amount of usage and other factors, PVC rainwater pipes that are too large in size will not be used in reality, and the principle of use is basically "enough is the main purpose". When draining rainwater, the function of the grille drain outlet is to block larger obstructions (mainly large leaves and branches blown by the wind). These larger obstructions basically do not affect the normal function of the sewer (sewer pipes are thicker), but for PVC rainwater pipes, they are the culprit that easily causes blockage of PVC rainwater pipes (because of this, the opening size of the grille drain outlet is also smaller, for example, slender strip holes or smaller square holes, round holes, etc. are used). Summary of the invention

[0003] The present invention provides a drainage pipe structure which is suitable for civil buildings. During normal drainage, it can smoothly collect and drain rainwater from the roof while blocking large-volume obstructions. When there are many or suspected many obstructions, the rapid drainage function can be turned on, which can avoid poor drainage due to blockage and automatically transfer and collect obstructions to ensure smooth subsequent drainage.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A drainage pipe structure, comprising a vertically arranged lower drainage pipe and a drainage trough which is arranged on the drainage channel on the roof and has an upper end opening, the lower end of the lower drainage pipe is connected to the external drainage pipe outside the building, the bottom of the drainage trough is provided with a drainage hole which is connected to the upper end of the lower drainage pipe, the lower drainage pipe is provided with a drainage cover for sealing the drainage hole, and the drainage cover is provided with a plurality of drainage holes;

[0006] The drainage trough is provided with a vertically arranged dense partition net, which divides the interior of the drainage trough into a general drainage cavity with an upper opening and a special drainage cavity with an upper opening. The drainage hole is connected with the general drainage cavity, and the drainage trough is provided with an upper sealing plate for sealing the upper opening of the special drainage cavity.

[0007] The lower drain pipe is provided with a large-pore soft filter under the drain cover, the edge of the large-pore soft filter is fixed to the lower drain pipe, one end of the drain cover is hinged to the water collecting groove through a hinge shaft, the drain cover is provided with a positioning groove, the side wall of the lower drain pipe is provided with a pipe wall hole that can be coaxially aligned with the positioning groove, a horizontal positioning rod that cooperates with the pipe wall hole in a sliding seal, and an outer seat fixed to the lower drain pipe, the outer seat is provided with an external gear rotatably connected to the outer seat, the horizontal positioning rod is provided with a horizontal rack meshing with the external gear, the drain cover has an arc surface for contacting the horizontal positioning rod, and the positioning groove opens on the arc surface;

[0008] The special drainage chamber is provided with a large floating block slidably connected to the water collecting trough, a small floating block slidably connected to the water collecting trough, a baffle plate above the small floating block, a vertical rotating rod rotatably connected to the bottom of the water collecting trough, a support plate arranged on the vertical rotating rod and a wire tube fixed to the bottom of the water collecting trough. The bottom of the large floating block is provided with a vertical positioning rod passing through the bottom of the water collecting trough. The vertical positioning rod is in sliding sealing cooperation with the bottom of the water collecting trough. The lower end of the vertical positioning rod is provided with a vertical rack meshing with an external gear. The small floating block is connected to the vertical rotating rod through a rotating rod pull wire. The rotating rod pull wire passes through the wire tube. A torsion spring is sleeved on the vertical rotating rod, and the vertical rotating rod is connected to the water collecting trough through the torsion spring.

[0009] When one end of the horizontal positioning rod is in the positioning groove: the drainage cover is arranged horizontally and seals the drainage hole, the drainage hole is connected to the drainage hole, the drainage hole is connected to the lower drainage pipe, the support plate is attached to the side wall of the large floating block, and the small hole on the pipe wall is coaxially aligned with the positioning groove;

[0010] When the support plate contacts the bottom of the large floating block: the horizontal positioning rod is separated from the positioning groove, and one end of the horizontal positioning rod is in the small hole of the pipe wall;

[0011] When the top of the small float contacts the baffle, the support plate contacts the bottom of the large float.

[0012] Preferably, an inner pull wire is provided in the lower drain pipe, one end of the inner pull wire is an upper wire end, and the other end of the inner pull wire is a lower wire end, the upper wire end is fixed to the drain cover, and the lower wire end is fixed to the large-pore soft filter screen, and the inner diameter of the lower drain pipe is R;

[0013] When the drain cover is arranged horizontally: the small hole on the pipe wall and the upper line end are located on opposite sides of the drain cover, the axis of the lower drain pipe passes through the lower line end, the height of the lower line end is higher than the height of the edge of the large-pore soft filter, and the vertical distance between the lower line end and the edge of the large-pore soft filter is L, 3L is greater than R;

[0014] When the drain cover is arranged vertically: the height of the lower line end is lower than the height of the edge of the large-pore soft filter.

[0015] Preferably, a tube wall feed hole, a tube wall liquid return hole and a collecting tube are provided on the side wall of the lower drainage pipe, and the collecting tube comprises an upper inclined tube, a middle vertical tube and a lower inclined tube, and the tube wall feed hole, the upper end of the upper inclined tube, the lower end of the upper inclined tube, the upper end of the middle vertical tube, the lower end of the middle vertical tube, the upper end of the lower inclined tube, the lower end of the lower inclined tube and the tube wall liquid return hole are connected in sequence, and a collecting filter is provided in the middle vertical tube;

[0016] When the drain cover is arranged horizontally: the small hole on the pipe wall, the upper line end, the feed hole on the pipe wall, the lowest point of the large-pore soft filter and the return hole on the pipe wall are arranged in order from top to bottom;

[0017] When the drain cover is arranged vertically: the drain cover seals the feed hole of the pipe wall, and the drainage hole is sealed by the wall of the lower drain pipe.

[0018] Preferably, the outer seat is provided with an auxiliary gear rotatably connected to the outer seat, the side wall of the lower drain pipe is provided with an auxiliary small hole, a horizontal auxiliary pipe coaxially connected to the auxiliary small hole, and a horizontal auxiliary push rod slidingly and sealingly matched with the horizontal auxiliary pipe, the horizontal auxiliary push rod is provided with an auxiliary rack meshing with the auxiliary gear, the horizontal auxiliary push rod is located below the horizontal limit rod, the horizontal auxiliary push rod slidingly and sealingly matches with the auxiliary pipe, and the aperture of the auxiliary small hole is greater than or equal to the inner diameter of the horizontal auxiliary pipe;

[0019] When the drain cover is arranged vertically: one end of the horizontal auxiliary push rod is in the horizontal auxiliary pipe, and the drain cover seals the auxiliary small hole.

[0020] Preferably, the wire tube is arranged horizontally, the small floating block, the wire tube, the vertical rotating rod and the large floating block are arranged in sequence along the axial direction of the wire tube, and a support seat for supporting the large floating block is provided at the bottom of the water collection tank;

[0021] When the bottom of the large floating block contacts the supporting seat: one end of the horizontal positioning rod is in the limiting groove, and the upper end of the large floating block, the lower end of the large floating block, and the small floating block are arranged in sequence from top to bottom.

[0022] The beneficial effects of the present invention are as follows: it is suitable for civil buildings, and during normal drainage, it can smoothly collect and drain rainwater from the roof while blocking large-volume obstructions. When there are many or suspected many obstructions, the rapid drainage function can be turned on, which can avoid poor drainage due to blockage and automatically transfer and collect obstructions to ensure smooth subsequent drainage; the opening and closing of the drainage cover can be used to vibrate and squeeze the large-pore soft filter, which can help small-sized impurities pass through the large-pore soft filter better; it has a side collection structure, which does not affect normal drainage, but can effectively accommodate large-sized impurities, ensure drainage effect, and greatly extend maintenance intervals. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is an enlarged view of point A in 1;

[0025] Figure 3 is a cross-sectional view of the present invention;

[0026] Figure 4 yes Figure 3 The enlarged view of point B in the middle;

[0027] Figure 5 yes Figure 3 Enlarged view of point C in the middle;

[0028] Figure 6 yes Figure 4 The enlarged view of point D in the middle;

[0029] Figure 7 It is a structural schematic diagram of the drainage cover of the present invention.

[0030] Figure numerals: lower drainage pipe 1, pipe wall feed hole 1a, pipe wall liquid return hole 1b, large-pore soft filter screen 11, inner pull wire 12, drainage trough 2, drainage hole 2a, dense separation net 21, general drainage chamber 21a, special drainage chamber 21b, upper sealing plate 22, drainage cover 3, drainage hole 3a, hinge shaft 31, horizontal positioning rod 41, outer seat 42, outer gear 43, horizontal rack 44, vertical rack 45, auxiliary gear 46, horizontal auxiliary pipe 47, horizontal auxiliary push rod 48, auxiliary rack 49, large floating block 51, small floating block 52, baffle 53, vertical rotating rod 54, support plate 55, wire tube 56, vertical positioning rod 57, rotating rod pull wire 58, support seat 59, collecting pipe 6, upper inclined pipe 6.1, middle vertical pipe 6.2, lower inclined pipe 6.3, collecting filter screen 61. DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0032] like Figures 1 to 7 As shown,

[0033] A drainage pipe structure, comprising a vertically arranged lower drainage pipe 1 and a drainage trough 2 which is arranged on a rooftop drainage channel and has an upper end opening, wherein the lower end of the lower drainage pipe is connected to an external drainage pipe outside the building, a drainage hole 2a which is connected to the upper end of the lower drainage pipe is arranged at the bottom of the drainage trough, a drainage cover 3 for sealing the drainage hole is arranged in the lower drainage pipe, and a plurality of drainage holes 3a are arranged on the drainage cover;

[0034] The drainage trough is provided with a vertically arranged dense partition net 21, which divides the interior of the drainage trough into a general drainage chamber 21a with an upper opening and a special drainage chamber 21b with an upper opening. The drainage hole is connected to the general drainage chamber, and the drainage trough is provided with an upper sealing plate 22 for sealing the upper opening of the special drainage chamber.

[0035] The lower drain pipe is provided with a large-pore soft filter screen 11 located below the drain cover, the edge of the large-pore soft filter screen is fixed to the lower drain pipe, one end of the drain cover is hinged to the water collecting trough through a hinge shaft 31, a positioning groove is provided on the drain cover, a small hole in the pipe wall that can be coaxially aligned with the positioning groove is provided on the side wall of the lower drain pipe, a horizontal positioning rod 41 that cooperates with the small hole in the pipe wall in a sliding seal, and an outer seat 42 fixed to the lower drain pipe, an outer gear 43 rotatably connected to the outer seat is provided on the outer seat, a horizontal positioning rod is provided with a horizontal rack 44 meshing with the external gear, the drain cover has an arc surface for contacting the horizontal positioning rod, and the positioning groove opens on the arc surface;

[0036] The special drainage chamber is provided with a large floating block 51 slidably connected to the water collecting trough, a small floating block 52 slidably connected to the water collecting trough, a baffle plate 53 above the small floating block, a vertical rotating rod 54 rotatably connected to the bottom of the water collecting trough, a support plate 55 arranged on the vertical rotating rod and a wire tube 56 fixed to the bottom of the water collecting trough. A vertical positioning rod 57 passing through the bottom of the water collecting trough is provided at the bottom of the large floating block. The vertical positioning rod is in sliding sealing cooperation with the bottom of the water collecting trough. A vertical rack 45 meshing with an external gear is provided at the lower end of the vertical positioning rod. The small floating block is connected to the vertical rotating rod through a rotating rod pull wire 58. The rotating rod pull wire passes through the wire tube. A torsion spring is sleeved on the vertical rotating rod, and the vertical rotating rod is connected to the water collecting trough through the torsion spring.

[0037] When one end of the horizontal positioning rod is in the positioning groove: the drainage cover is arranged horizontally and seals the drainage hole, the drainage hole is connected to the drainage hole, the drainage hole is connected to the lower drainage pipe, the support plate is attached to the side wall of the large floating block, and the small hole on the pipe wall is coaxially aligned with the positioning groove;

[0038] When the support plate contacts the bottom of the large floating block: the horizontal positioning rod is separated from the positioning groove, and one end of the horizontal positioning rod is in the small hole of the pipe wall;

[0039] When the top of the small float contacts the baffle, the support plate contacts the bottom of the large float.

[0040] Normally, after rainwater falls on the roof, it enters the eaves gutter on the roof, and then gathers in the drainage trough. The rainwater enters the lower drain pipe through the drainage holes on the drain cover, and the obstructions (large leaves, branches, etc.) are blocked and remain on the drain cover (small impurities can pass through the drainage holes and are not easy to cause blockage in subsequent pipelines, so they are not called obstructions). In this way, the obstruction will not enter the external drain pipe outside the building through the lower drain pipe (the external drain pipe can use the common municipal PVC rainwater pipe), and the rainwater entering the lower drain pipe is discharged into the sewer or sewage well through the external drain pipe.

[0041] When there are many or suspected many obstructions, the present invention will activate the quick drainage function. "Many obstructions" means that there are many obstructions gathered at the drainage cover, resulting in a lot of water accumulation and high water level in the drainage trough (the drainage path is not smooth), and "many suspected obstructions" means that there is a lot of water accumulation and high water level in the drainage trough due to heavy rain (the drainage path is smooth at this time).

[0042] In the case of "many obstructions", that is, there are many obstructions gathered at the drainage cover, resulting in a lot of water accumulation in the drainage trough and a high water level. Due to poor drainage, water accumulates significantly in the drainage trough and the water level rises significantly. When the water accumulates to a certain extent, the "quick drainage function" is turned on. Specifically, driven by buoyancy, the large floating block rises, and the large floating block drives the vertical positioning rod and the vertical rack to rise. The vertical rack drives the horizontal positioning rod and the horizontal rack to move through the external gear, and the horizontal positioning rod leaves the positioning groove, so that the drainage cover is no longer "locked" by the horizontal positioning rod. The drainage cover rotates downward along the hinge axis, and the entire drainage hole is "opened", so that water can be quickly discharged from the drainage hole, and the obstructions gathered at the drainage cover will also pass through the drainage hole (if there are obstructions partially stuck in the drainage hole, they will also be washed away by the "quick drainage water flow"), rainwater and small-sized impurities will be discharged through the large-pore soft filter, and the obstructions will stay on the large-pore soft filter, that is, they will be collected by the large-pore soft filter.

[0043] Regarding the situation of "many suspected obstructions", that is, there is a lot of water accumulation and high water level in the drainage trough due to heavy rain. In fact, the drainage at each drainage hole is unobstructed at this time, but there is also a common situation: due to the heavy rain, a lot of water accumulation and high water level in the drainage trough, a large amount of light impurities (leaves, branches, etc.) float on the water surface, and the impurities that could originally pass through the drainage holes fail to pass through the drainage holes and be discharged in time with the water flow, but gather on the water surface. After that, at a certain moment, when the water level in the drainage trough drops (the accumulated water is about to be drained), these large amounts of impurities gathered on the water surface rush to the drainage holes together, which can easily cause the drainage holes to be quickly blocked (under normal circumstances, impurities that are originally large enough to pass through the drainage holes will be discharged from the drainage holes little by little with the water flow, and will not cause the drainage holes to be blocked, but if a large number of impurities reach the drainage holes together, it is very easy to cause blockage). In order to cope with this situation, once there is a situation of "suspected large number of obstructions", that is, there is a lot of water accumulation and high water level in the drainage trough due to heavy rain, the "quick drainage function" will still be turned on. In this way, the "quick drainage water flow" with a relatively large flow rate can carry more light impurities floating on the water surface (leaves, branches, etc.) through the drainage holes, thereby avoiding a large amount of impurities from accumulating on the water surface in the drainage trough.

[0044] When the quick drainage function is turned on, when the large float rises, the small float also tends to rise (the water first submerges the small float, but due to the limitation of the side wall of the large float on the support plate, the rotating rod and the rotating rod pull line cannot move, so the small float cannot float up either). After the large float rises to a certain extent, the side wall of the large float leaves the support plate. At this time, under the action of buoyancy, the small float rises until it contacts the baffle, and the small float drives the rotating rod to rotate through the rotating rod pull line, so that the support plate also rotates to "a part of the support plate is under the large float". In this way, in the subsequent process of water level dropping in the drainage trough, even if the water level is already low (buoyancy alone is not enough to support the large float to continue to remain above the support plate), the large float can still be placed on the support plate. This avoids the problem that after the "quick drainage function" takes effect, even at a certain moment, "the water level in the drainage trough has dropped a lot, but there is still a lot of rainwater and light impurities floating on the water surface that have not passed through the drainage hole, the large float begins to drop and causes the drainage cover to cover the drainage hole". Instead, the small float will descend only after the accumulated water in the drainage trough is basically drained, the vertical rotating rod (under the action of the torsion spring) will be reset, the support plate will be reset (leave the bottom of the large float), and then the large float will descend and reset, and drive the horizontal positioning rod to push the drainage cover to reset, until the drainage cover is finally reset (return to the closed state). When the horizontal positioning rod pushes the drainage cover to reset, the horizontal positioning rod first pushes the end face of the drainage cover, then pushes the curved surface of the drainage cover, and finally the horizontal positioning rod enters the positioning groove to "lock" the drainage cover.

[0045] It should be emphasized that the mesh of the dense filter is small, and only small impurities can enter the special cavity, so it will basically not affect the various structures in the special cavity. The mesh of the large-pore soft filter is obviously larger, and small impurities can pass through smoothly, and only blockages (mainly large impurities such as leaves and branches) are blocked.

[0046] The lower drain pipe is provided with an inner pull wire 12, one end of the inner pull wire is an upper wire end, and the other end of the inner pull wire is a lower wire end. The upper wire end is fixed to the drain cover, and the lower wire end is fixed to the large-pore soft filter. The inner diameter of the lower drain pipe is R;

[0047] When the drain cover is arranged horizontally: the small hole on the pipe wall and the upper line end are located on opposite sides of the drain cover, the axis of the lower drain pipe passes through the lower line end, the height of the lower line end is higher than the height of the edge of the large-pore soft filter, and the vertical distance between the lower line end and the edge of the large-pore soft filter is L, 3L is greater than R;

[0048] When the drain cover is arranged vertically: the height of the lower line end is lower than the height of the edge of the large-pore soft filter.

[0049] When the drain cover is arranged horizontally, the large-pore soft filter is in a "convex" state, and when the drain cover is arranged vertically, the large-pore soft filter is in a "concave" state. This means that due to the existence of the inner pull wire, the large-pore soft filter will deform during the switching process of the drain cover between the open state and the closed state. In this way, some impurities that can pass through the large-pore soft filter but remain on the large-pore soft filter can pass through the large-pore soft filter smoothly due to the deformation vibration, mesh change and extrusion of the large-pore soft filter, and then be discharged into the external drain pipe, sewer (or sewage well). In this way, the amount of impurities on the large-pore soft filter is reduced, and the patency of drainage is improved. In addition, the large-pore soft filter is only used to collect large-sized obstructions, and the relative collection capacity becomes stronger (relatively more large-sized obstructions can be collected).

[0050] The side wall of the lower drainage pipe is provided with a pipe wall feed hole 1a, a pipe wall liquid return hole 1b and a collecting pipe 6, the collecting pipe comprises an upper inclined pipe 6.1, a middle vertical pipe 6.2 and a lower inclined pipe 6.3, the pipe wall feed hole, the upper end of the upper inclined pipe, the lower end of the upper inclined pipe, the upper end of the middle vertical pipe, the lower end of the middle vertical pipe, the upper end of the lower inclined pipe, the lower end of the lower inclined pipe and the pipe wall liquid return hole are connected in sequence, a collecting filter screen 61 is provided in the middle vertical pipe, and an inspection door is provided on the middle vertical pipe;

[0051] When the drain cover is arranged horizontally: the small hole on the pipe wall, the upper line end, the feed hole on the pipe wall, the lowest point of the large-pore soft filter and the return hole on the pipe wall are arranged in order from top to bottom;

[0052] When the drain cover is arranged vertically: the drain cover seals the feed hole of the pipe wall, and the drainage hole is sealed by the wall of the lower drain pipe.

[0053] In the aforementioned scheme, although the large-pore soft filter can collect large-sized obstructions, it still affects the drainage speed after all, because the drainage water will pass through the large-pore soft filter. As the large-pore soft filter collects more large-sized obstructions, it will have more or less negative effects, and the diameter of the lower drainage pipe is limited, and the collection capacity is also limited. In this scheme, with the collection pipe structure, each time the drain cover is reset, the drain cover pulls the large-pore soft filter upward through the inner pull wire, and part of the impurities left on the large-pore soft filter will fall into the feed hole of the pipe wall next to it, and enter the collection pipe, and finally stay on the collection filter. In this way, the drainage effect is basically unaffected. And because of the collection of the collection pipe, it can be maintenance-free for a long time (when maintenance is required, open the inspection door to clean the impurities on the collection filter).

[0054] The outer seat is provided with an auxiliary gear 46 rotatably connected to the outer seat, the side wall of the lower drain pipe is provided with an auxiliary small hole, a horizontal auxiliary pipe 47 coaxially connected to the auxiliary small hole, and a horizontal auxiliary push rod 48 slidingly sealingly matched with the horizontal auxiliary pipe, the horizontal auxiliary push rod is provided with an auxiliary rack 49 meshing with the auxiliary gear, the horizontal auxiliary push rod is located below the horizontal limit rod, the horizontal auxiliary push rod is slidingly sealingly matched with the auxiliary pipe, and the aperture of the auxiliary small hole is greater than or equal to the inner diameter of the horizontal auxiliary pipe;

[0055] When the drain cover is arranged vertically: one end of the horizontal auxiliary push rod is in the horizontal auxiliary pipe, and the drain cover seals the auxiliary small hole.

[0056] The horizontal auxiliary push rod can provide assistance when resetting the drain cover.

[0057] The wire pipe is arranged horizontally, and the small floating block, wire pipe, vertical rotating rod and large floating block are arranged in sequence along the axial direction of the wire pipe. A support seat 59 for supporting the large floating block is provided at the bottom of the water collecting tank;

[0058] When the bottom of the large floating block contacts the supporting seat: one end of the horizontal positioning rod is in the limiting groove, and the upper end of the large floating block, the lower end of the large floating block, and the small floating block are arranged in sequence from top to bottom.

[0059] The wire tube has the function of guiding the rotating rod to pull the wire, and the support seat can provide support for the large floating block.

Claims

1. A drainage pipe structure, comprising a vertically arranged lower drainage pipe and a drainage trough with an upper end opened on the drainage channel on the roof, wherein the lower end of the lower drainage pipe is connected to the external drainage pipe outside the building, a drainage hole connected to the upper end of the lower drainage pipe is provided at the bottom of the drainage trough, a drainage cover for sealing the drainage hole is provided in the lower drainage pipe, and a plurality of drainage holes are provided on the drainage cover; wherein the drainage cover is characterized in that: The drainage trough is provided with a vertically arranged dense partition net, which divides the interior of the drainage trough into a general drainage cavity with an upper opening and a special drainage cavity with an upper opening. The drainage hole is connected with the general drainage cavity, and the drainage trough is provided with an upper sealing plate for sealing the upper opening of the special drainage cavity. The lower drain pipe is provided with a large-pore soft filter under the drain cover, the edge of the large-pore soft filter is fixed to the lower drain pipe, one end of the drain cover is hinged to the water collecting groove through a hinge shaft, the drain cover is provided with a positioning groove, the side wall of the lower drain pipe is provided with a pipe wall hole that can be coaxially aligned with the positioning groove, a horizontal positioning rod that cooperates with the pipe wall hole in a sliding seal, and an outer seat fixed to the lower drain pipe, the outer seat is provided with an external gear rotatably connected to the outer seat, the horizontal positioning rod is provided with a horizontal rack meshing with the external gear, the drain cover has an arc surface for contacting the horizontal positioning rod, and the positioning groove opens on the arc surface; The special drainage chamber is provided with a large floating block slidably connected to the water collecting trough, a small floating block slidably connected to the water collecting trough, a baffle plate above the small floating block, a vertical rotating rod rotatably connected to the bottom of the water collecting trough, a support plate arranged on the vertical rotating rod and a wire tube fixed to the bottom of the water collecting trough. The bottom of the large floating block is provided with a vertical positioning rod passing through the bottom of the water collecting trough. The vertical positioning rod is in sliding sealing cooperation with the bottom of the water collecting trough. The lower end of the vertical positioning rod is provided with a vertical rack meshing with an external gear. The small floating block is connected to the vertical rotating rod through a rotating rod pull wire. The rotating rod pull wire passes through the wire tube. A torsion spring is sleeved on the vertical rotating rod, and the vertical rotating rod is connected to the water collecting trough through the torsion spring. When one end of the horizontal positioning rod is in the positioning groove: the drainage cover is arranged horizontally and seals the drainage hole, the drainage hole is connected to the drainage hole, the drainage hole is connected to the lower drainage pipe, the support plate is attached to the side wall of the large floating block, and the small hole on the pipe wall is coaxially aligned with the positioning groove; When the support plate contacts the bottom of the large floating block: the horizontal positioning rod is separated from the positioning groove, and one end of the horizontal positioning rod is in the small hole of the pipe wall; When the top of the small float contacts the baffle, the support plate contacts the bottom of the large float.

2. A drainage pipe structure according to claim 1, characterized in that: The lower drain pipe is provided with an inner pull wire, one end of the inner pull wire is an upper wire end, and the other end of the inner pull wire is a lower wire end. The upper wire end is fixed to the drain cover, and the lower wire end is fixed to the large-pore soft filter. The inner diameter of the lower drain pipe is R; When the drain cover is arranged horizontally: the small hole on the pipe wall and the upper line end are located on opposite sides of the drain cover, the axis of the lower drain pipe passes through the lower line end, the height of the lower line end is higher than the height of the edge of the large-pore soft filter, and the vertical distance between the lower line end and the edge of the large-pore soft filter is L, 3L is greater than R; When the drain cover is arranged vertically: the height of the lower line end is lower than the height of the edge of the large-pore soft filter.

3. A drainage pipe structure according to claim 2, characterized in that: The side wall of the lower drainage pipe is provided with a pipe wall feed hole, a pipe wall liquid return hole and a collecting pipe, the collecting pipe comprises an upper inclined pipe, a middle vertical pipe and a lower inclined pipe, the pipe wall feed hole, the upper end of the upper inclined pipe, the lower end of the upper inclined pipe, the upper end of the middle vertical pipe, the lower end of the middle vertical pipe, the upper end of the lower inclined pipe, the lower end of the lower inclined pipe and the pipe wall liquid return hole are connected in sequence, and a collecting filter is provided in the middle vertical pipe; When the drain cover is arranged horizontally: the small hole on the pipe wall, the upper line end, the feed hole on the pipe wall, the lowest point of the large-pore soft filter and the return hole on the pipe wall are arranged in order from top to bottom; When the drain cover is arranged vertically: the drain cover seals the feed hole of the pipe wall, and the drainage hole is sealed by the wall of the lower drain pipe.

4. A drainage pipe structure according to claim 1, 2 or 3, characterized in that: The outer seat is provided with an auxiliary gear rotatably connected to the outer seat, the side wall of the lower drain pipe is provided with an auxiliary small hole, a horizontal auxiliary pipe coaxially connected to the auxiliary small hole, and a horizontal auxiliary push rod slidingly and sealingly matched with the horizontal auxiliary pipe, the horizontal auxiliary push rod is provided with an auxiliary rack meshing with the auxiliary gear, the horizontal auxiliary push rod is located below the horizontal limit rod, the horizontal auxiliary push rod slidingly and sealingly matches with the auxiliary pipe, and the aperture of the auxiliary small hole is greater than or equal to the inner diameter of the horizontal auxiliary pipe; When the drain cover is arranged vertically: one end of the horizontal auxiliary push rod is in the horizontal auxiliary pipe, and the drain cover seals the auxiliary small hole.

5. A drainage pipe structure according to claim 1, 2 or 3, characterized in that: The wire pipe is arranged horizontally, the small floating block, the wire pipe, the vertical rotating rod and the large floating block are arranged in sequence along the axial direction of the wire pipe, and a support seat for supporting the large floating block is provided at the bottom of the water collecting tank; When the bottom of the large floating block contacts the supporting seat: one end of the horizontal positioning rod is in the limiting groove, and the upper end of the large floating block, the lower end of the large floating block, and the small floating block are arranged in sequence from top to bottom.

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