Cable trench drainage device

Abstract

The present invention discloses a cable trench drainage device, comprising a water collection well arranged beside the cable trench, a drainage outlet arranged at the bottom of the cable trench and connected to the water collection well, a submersible sewage pump with a downward suction port arranged at the bottom of the water collection well, a second liquid level switch arranged on the well wall of the water collection well, and a first liquid level switch arranged on the well wall of the water collection well; the outlet pipe of the submersible sewage pump is in a horizontal direction, the outlet pipe is connected to a drainage pipe, and the drainage pipe is connected to an external rainwater pipe. The accumulated water in the cable trench can be discharged into the water collection well in time, and then automatically discharged to the rainwater pipe through the submersible sewage pump, so that there is no more accumulated water in the cable trench, thereby ensuring the normal operation and service life of the cables in the cable trench. Since the cable trench is no longer soaked in accumulated water, the service life of the cable trench can be extended, and collapse accidents due to long-term soaking in accumulated water will not occur.

Description

Technical Field

[0001] The invention relates to the technical field of cable trench drainage, and in particular to a cable trench drainage device. Background Art

[0002] The facilities in the substation are connected by cables, which are usually laid in cable trenches. In the rainy season, rainwater will seep into and flow into the outdoor cable trenches, forming water accumulation in the cable trenches, which will affect the normal operation of the cables in the cable trenches. Moreover, the cable trenches are soaked in rainwater for a long time, which is also easy to affect the strength of the cable trenches and the cable brackets in the cable trenches. In serious cases, cable trench collapse accidents may occur. Water accumulation in the cable trenches will affect the operation safety of the cables in the cable trenches and reduce the service life of the cable trenches.

[0003] Once a safety failure occurs in the cable, it is likely to affect the normal power supply and may also cause the equipment protection and control circuits to fail, causing the accident to expand or even damage the main equipment in the station. The maintenance work involves a wide range and takes a long time, which seriously affects the normal power supply. For example, if the accumulated water in the cable trench cannot be removed for a long time, it may cause large-scale paralysis of power facilities in serious cases.

[0004] At the same time, the outdoor cable trench is connected to the distribution room or high-voltage room of the substation. When the outdoor cable trench is seriously flooded, the accumulated water or moisture will enter the distribution room or high-voltage room, causing condensation on the walls of the switch cabinets in the distribution room or high-voltage room, posing a great safety hazard to the operation of power equipment.

[0005] The patent application with publication number CN204040163U discloses a cable trench drainage structure, including: a water collection ditch, a water seepage well and a connecting pipe. The drainage is achieved by draining the accumulated water in the cable trench into the water seepage well and then seeping into the ground. If the amount of accumulated water is large, the water seepage well will not be able to seep the accumulated water into the ground in time. Moreover, the water seepage well is easily blocked by the silt in the accumulated water, resulting in poor water seepage effect.

[0006] The patent application with publication number CN205530583U discloses a cable trench drainer for electrical equipment, including a working plate, a fixing frame and a water pump. Since the water in the cable trench is extracted by the water pump, manual operation is required and the machine can only be used for emergency drainage of the cable trench, but cannot realize automatic drainage of the cable trench. Summary of the invention

[0007] The purpose of the present invention is to timely discharge the accumulated water in an outdoor cable trench and to propose a cable trench drainage device to ensure the normal operation of the cable and eliminate the potential accidents caused by the accumulated water.

[0008] To achieve the above purpose, the technical solution adopted by the present invention is:

[0009] A cable trench drainage device comprises a sump arranged beside the cable trench, a drain outlet arranged at the bottom of the cable trench and connected to the sump, a submersible sewage pump with a downward suction port arranged at the bottom of the sump, a second liquid level switch arranged on the well wall of the sump, and a first liquid level switch arranged on the well wall of the sump; the first liquid level switch is arranged above the second liquid level switch, the first liquid level switch is lower than the drain outlet, the second liquid level switch is higher than the impeller of the submersible sewage pump, the outlet pipe of the submersible sewage pump is horizontal, the outlet pipe is connected to a drain pipe, and the drain pipe is connected to an external rainwater pipe.

[0010] Furthermore, a docking assembly is provided between the drain pipe and the water outlet of the submersible sewage pump, and the docking assembly includes a drain flange fixedly arranged at one end of the drain pipe close to the submersible sewage pump and a pump flange fixedly connected to the outer end of the drain pipe of the submersible sewage pump, a vertical slot is provided in the drain flange, and a notch is provided on the side of the drain flange close to the submersible sewage pump, when the outlet pipe of the submersible sewage pump is connected with the drain pipe, the pump flange is inserted into the notch, and the drain pipe is located in the notch.

[0011] Furthermore, a vertical slide rail is fixedly provided on the well wall of the water collection well, a sliding block is slidably connected to the slide rail, and the sliding block is fixedly connected to the submersible sewage pump.

[0012] Furthermore, a stirring wheel is provided below the impeller of the submersible sewage pump, and the stirring wheel is fixedly connected to the shaft of the submersible sewage pump.

[0013] Furthermore, a filter box with a top opening is detachably connected to the wall of the water collection well below the drain outlet, the side walls and the bottom of the filter box are provided with through holes, and the inner wall of the filter box is paved with a filter net.

[0014] Furthermore, the drainage pipe is connected to the top of the rainwater pipe.

[0015] Furthermore, a check valve is provided on the drain pipe.

[0016] Furthermore, the slide rails are two parallel slide rails, the drain pipe is vertically arranged between the two slide rails, a connecting plate is fixedly arranged on one side of the slide rail close to the wall of the sump, and the drain pipe and the wall of the sump are fixedly connected to the connecting plate.

[0017] Furthermore, the check valve is at a height higher than the rainwater pipe.

[0018] Furthermore, it also includes a controller, and the first liquid level switch, the second liquid level switch and the submersible sewage pump are all electrically connected to the controller.

[0019] The positive effects of the present invention are:

[0020] 1. The present invention is provided with a water collection well connected to the cable trench, and a submersible sewage pump is provided in the water collection well. The outlet of the submersible sewage pump is connected to the rainwater pipe, so that the accumulated water in the cable trench can be discharged into the water collection well in time, and then automatically discharged to the rainwater pipe through the submersible sewage pump, so that there is no more accumulated water in the cable trench, thereby ensuring the normal operation and service life of the cables in the cable trench. Since the cable trench is no longer soaked in accumulated water, the service life of the cable trench can be extended, and collapse accidents due to long-term soaking in accumulated water will not occur.

[0021] 2. The present invention is provided with a docking assembly and a slide rail, so the submersible sewage pump can be easily installed and maintained, thereby improving work efficiency.

[0022] 3. A filter box is installed in the water collection well to filter the accumulated water flowing into the water collection well from the cable trench, reducing the accumulation of large particles of sand and debris at the bottom of the water collection well, thereby preventing the submersible sewage pump from being blocked and unable to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of Example 1;

[0024] Figure 2 yes Figure 1 A partial enlarged view of the middle I part;

[0025] Figure 3 yes Figure 2 Sectional view of AA in the middle;

[0026] Figure 4 yes Figure 1 Right side view of the middle slide rail;

[0027] Figure 5 is a schematic structural diagram of Example 2;

[0028] Figure 6 is a schematic structural diagram of Example 3;

[0029] In the figure:

[0030] 1. Rainwater pipe; 2. Drain pipe; 3. Manhole cover; 4. Check valve; 5. Water collection well;

[0031] 6. Trench cover; 7. Cable trench; 8. Drainage outlet; 9. First liquid level switch; 10. Second liquid level switch;

[0032] 11. Submersible sewage pump; 12. Agitator wheel; 13. Docking assembly; 14. Slide rail; 15. Drain flange;

[0033] 16. Pump flange; 17. Slider; 18. Filter box; 19. Connecting plate. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described implementation methods are only part of the embodiments of the present application, rather than all the embodiments. The following description of the implementation methods is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the implementation methods in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0035] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0036] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in the embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0037] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0038] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0039] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0040] The contents of the present invention are further explained and illustrated below in conjunction with specific embodiments and drawings. It should be noted that the following embodiments are only preferred embodiments, not all embodiments, and should not limit the protection scope of the present invention.

[0041] Example 1

[0042] like Figures 1 to 4 As shown, a cable trench drainage device includes a concrete collection well 5 arranged on the left side of the cable trench 7, a drainage outlet 8 arranged at the bottom of the cable trench 7 and connected to the collection well 5, a vertical submersible sewage pump 11 with a downward suction port arranged at the bottom of the collection well 5, a second liquid level switch 10 arranged on the well wall of the collection well 5, and a first liquid level switch 9 arranged on the well wall of the collection well 5.

[0043] The drain pipe 2 is communicated with the top of the rainwater pipe 1 , and a check valve 4 is provided on the drain pipe 2 . The height of the check valve 4 is higher than the rainwater pipe 1 .

[0044] A rope is tied to the top of the submersible sewage pump 11. After the submersible sewage pump 11 is placed at the bottom of the water collection well 5, the top end of the rope is tied to the left side wall of the water collection well 5 near the top.

[0045] The submersible sewage pump 11 is a submersible sewage pump, which integrates a submersible motor and a sewage pump into one, with the submersible motor on the top and the sewage pump on the bottom. It is particularly suitable for conveying liquids containing hard solids, fibers, and particularly dirty, sticky, and slippery liquids.

[0046] Compared with general horizontal pumps and vertical sewage pumps, submersible sewage pumps 11 have the following advantages:

[0047] 1. Compact structure and small footprint. Since the submersible sewage pump works under the liquid, it can be directly installed in the sewage pool. There is no need to build a special pump room to install the pump and machine, which can save a lot of land and infrastructure costs.

[0048] 2. Easy installation and maintenance. When repairing, you only need to lift the submersible sewage pump 11 out of the water and then carry out the maintenance operation.

[0049] 3. Long continuous operation time. The sewage pump and submersible motor of the sewage pump are coaxial, the shaft is short, and the rotating parts are light, so the radial load on the bearing during operation is relatively small, and the service life is much longer than that of ordinary pumps.

[0050] 4. There is no cavitation damage and water filling and diversion problems. Since the submersible sewage pump 11 is submerged in water for operation, it is not necessary to fill the pump with water before starting, which brings great convenience to the operator. After running in water, the pump is not prone to cavitation, so the impeller is not easily damaged by cavitation.

[0051] The inner wall of the water collection well 5 is coated with a waterproof coating, the bottom of the cable trench 7 is inclined from the lower left to the upper right, and the drainage hole 8 is arranged at the bottom of the left trench wall of the cable trench 7. The top of the cable trench 7 is covered with a trench cover 6, and the top of the water collection well 5 is covered with a well cover 3.

[0052] The first liquid level switch 9 and the second liquid level switch 10 are both fixedly arranged on the well wall on the right side of the sump 5, the second liquid level switch 10 is close to the bottom of the sump 5, the first liquid level switch 9 is arranged above the second liquid level switch 10, the first liquid level switch 9 is lower than the drain outlet 8, the second liquid level switch 10 is higher than the impeller of the submersible sewage pump 11, the outlet pipe of the submersible sewage pump 11 is horizontal to the left, and the outlet pipe is connected to a vertical drain pipe 2, and the top of the drain pipe 2 is connected to the rainwater pipe 1 in the substation.

[0053] A docking assembly 13 is provided between the drain pipe 2 and the water outlet of the submersible sewage pump 11, and the docking assembly 13 includes a drain flange 15 welded to one end of the drain pipe 2 close to the submersible sewage pump 11 and a pump flange 16 cast on the outer end of the drain pipe 2 of the submersible sewage pump 11. A vertical slot is provided in the drain flange 15, and a notch is provided on one side of the drain flange 15 close to the submersible sewage pump 11. When the outlet pipe of the submersible sewage pump 11 is connected with the drain pipe 2, the pump flange 16 is inserted into the notch, and the drain pipe 2 is located in the notch.

[0054] A vertical slide rail 14 is fixedly provided on the well wall on the left side of the water collection well 5 by an anchor bolt, and a T-shaped groove is provided on the slide rail 14. A slider 17 is provided on the slide rail 14, and one end of the slider 17 is a T-shaped block that can slide in the T-shaped groove, and the other end of the slider 17 is fixedly connected to the upper part of the submersible sewage pump 11 by a connecting rod.

[0055] When the submersible sewage pump 11 slides down along the slide rail 14 to the bottom of the water collection well 5 , the pump flange 16 is inserted into the drainage flange 15 , thereby achieving the connection between the outlet pipe of the submersible sewage pump 11 and the drainage pipe 2 .

[0056] When the submersible sewage pump 11 needs to be maintained or repaired, it is only necessary to open the manhole cover 3, and then pull up the rope tied to the top of the submersible sewage pump 11, the pump flange 16 can be separated from the drain flange 15, and then the submersible sewage pump 11 can be lifted up out of the sump 5 for subsequent maintenance and repair operations.

[0057] Therefore, after the docking assembly 13 is provided, the submersible sewage pump 11 can be conveniently installed and maintained, thereby improving work efficiency.

[0058] The slide rails 14 are two parallel slide rails, the drain pipe 2 is vertically arranged between the two slide rails 14, a connecting plate is fixedly arranged on one side of the slide rail 14 close to the wall of the water collection well 5, and the drain pipe 2 and the wall of the water collection well 5 are fixedly connected to the connecting plate.

[0059] A controller is also provided in the cable trench 7, and the first liquid level switch 9, the second liquid level switch 10 and the submersible sewage pump 11 are all electrically connected to the controller.

[0060] In actual implementation, the number of the water collection wells 5 is set according to the length of the cable trench 7 so as to collect the accumulated water in the cable trench 7 in time.

[0061] When it rains, the accumulated water in the cable trench 7 flows along the bottom of the cable trench 7 to the drain port 8, and is collected into the water collection well 5 through the drain port 8. When the water level in the water collection well 5 is higher than the first liquid level switch 9, the first liquid level switch 9 feeds back the water level signal to the controller, and the controller starts the submersible sewage pump 11. After the submersible sewage pump 11 is running, the accumulated water in the water collection well 5 is discharged into the rainwater pipe 1 in the substation through the drain pipe 2.

[0062] As the accumulated water in the water collection well 5 is discharged, the water level in the water collection well 5 gradually decreases. When the water level drops below the second liquid level switch 10, the second liquid level switch 10 feeds back the water level signal to the controller, and the controller stops the submersible sewage pump 11 from running.

[0063] Therefore, the accumulated water in the cable trench 7 can be discharged into the water collection well 5 through the drain port 8 in time, and the accumulated water in the water collection well 5 can be automatically discharged to the rainwater pipe 1, so that there is no more accumulated water in the cable trench 7, thereby ensuring the normal operation and service life of the cables in the cable trench 7. Since the cable trench 7 is no longer soaked in accumulated water, the service life of the cable trench 7 can be extended, and no collapse accident will occur due to long-term soaking in accumulated water.

[0064] After the water accumulated in the outdoor cable trench 7 is drained, the accumulated water will not enter the distribution room or the high-voltage room vertically through the cable trench 7, thereby avoiding condensation on the switch cabinet wall in the distribution room or the high-voltage room, and eliminating the hidden danger of power equipment operation safety caused by water accumulation in the cable trench 7.

[0065] Example 2

[0066] like Figure 5 As shown, the same thing as Example 1 is that:

[0067] A cable trench drainage device comprises a concrete collection well 5 arranged on the left side of the cable trench 7, a drainage outlet 8 arranged at the bottom of the cable trench 7 and connected to the collection well 5, a vertical submersible sewage pump 11 with a downward suction port arranged at the bottom of the collection well 5, a second liquid level switch 10 arranged on the well wall of the collection well 5, and a first liquid level switch 9 arranged on the well wall of the collection well 5.

[0068] The drain pipe 2 is communicated with the top of the rainwater pipe 1 , and a check valve 4 is provided on the drain pipe 2 . The height of the check valve 4 is higher than the rainwater pipe 1 .

[0069] A rope is tied to the top of the submersible sewage pump 11. After the submersible sewage pump 11 is placed at the bottom of the water collection well 5, the top end of the rope is tied to the left side wall of the water collection well 5 near the top.

[0070] The submersible sewage pump 11 is a submersible sewage pump, which integrates a submersible motor and a sewage pump into one, with the submersible motor on the top and the sewage pump on the bottom. It is particularly suitable for conveying liquids containing hard solids, fibers, and particularly dirty, sticky, and slippery liquids.

[0071] The inner wall of the water collection well 5 is coated with a waterproof coating, the bottom of the cable trench 7 is inclined from the lower left to the upper right, and the drainage hole 8 is arranged at the bottom of the left trench wall of the cable trench 7. The top of the cable trench 7 is covered with a trench cover 6, and the top of the water collection well 5 is covered with a well cover 3.

[0072] The first liquid level switch 9 and the second liquid level switch 10 are both fixedly arranged on the well wall on the right side of the sump 5, the second liquid level switch 10 is close to the bottom of the sump 5, the first liquid level switch 9 is arranged above the second liquid level switch 10, the first liquid level switch 9 is lower than the drain outlet 8, the second liquid level switch 10 is higher than the impeller of the submersible sewage pump 11, the outlet pipe of the submersible sewage pump 11 is horizontal to the left, and the outlet pipe is connected to a vertical drain pipe 2, and the top of the drain pipe 2 is connected to the rainwater pipe 1 in the substation.

[0073] A docking assembly 13 is provided between the drain pipe 2 and the water outlet of the submersible sewage pump 11, and the docking assembly 13 includes a drain flange 15 welded to one end of the drain pipe 2 close to the submersible sewage pump 11 and a pump flange 16 cast on the outer end of the drain pipe 2 of the submersible sewage pump 11. A vertical slot is provided in the drain flange 15, and a notch is provided on one side of the drain flange 15 close to the submersible sewage pump 11. When the outlet pipe of the submersible sewage pump 11 is connected with the drain pipe 2, the pump flange 16 is inserted into the notch, and the drain pipe 2 is located in the notch.

[0074] A vertical slide rail 14 is fixedly provided on the well wall on the left side of the water collection well 5 by an anchor bolt, and a T-shaped groove is provided on the slide rail 14. A slider 17 is provided on the slide rail 14, and one end of the slider 17 is a T-shaped block that can slide in the T-shaped groove, and the other end of the slider 17 is fixedly connected to the upper part of the submersible sewage pump 11 by a connecting rod.

[0075] The slide rails 14 are two parallel slide rails, the drain pipe 2 is vertically arranged between the two slide rails 14, a connecting plate is fixedly arranged on one side of the slide rail 14 close to the wall of the water collection well 5, and the drain pipe 2 and the wall of the water collection well 5 are fixedly connected to the connecting plate.

[0076] A controller is also provided in the cable trench 7, and the first liquid level switch 9, the second liquid level switch 10 and the submersible sewage pump 11 are all electrically connected to the controller.

[0077] The difference between this embodiment and embodiment 1 is that:

[0078] A filter box 18 with a top opening is hung on the wall of the water collection well 5 below the drain outlet 8. The side walls and the bottom of the filter box 18 are provided with through holes, and the inner wall of the filter box 18 is paved with a filter net.

[0079] After the filter box 18 is provided, the accumulated water flowing into the water collection well 5 from the cable trench 7 can be filtered, reducing the accumulation of large particles of silt and debris at the bottom of the water collection well 5, and preventing the submersible sewage pump 11 from being unable to operate due to blockage.

[0080] After opening the well cover 3, the filter box 18 is taken out and the sundries inside the filter box 18 can be cleaned.

[0081] Example 3

[0082] like Figure 6 As shown, the difference between this embodiment and embodiment 2 is that:

[0083] A stirring wheel 12 is provided below the impeller of the submersible sewage pump 11 , and a spiral reamer is provided on the stirring wheel 12 . The stirring wheel 12 is fixedly connected to the lower end of the shaft of the submersible sewage pump 11 by screws.

[0084] When the submersible sewage pump 11 is in operation, it drives the stirring wheel 12 to rotate, stirring and breaking the sludge lumps formed on the bottom of the water collection well 5 due to long-term siltation, dividing them into small pieces, which are then sucked away by the submersible sewage pump 11 to prevent large pieces of sludge lumps from clogging the submersible sewage pump 11.

[0085] The above-mentioned embodiments describe the contents in a relatively detailed and specific manner, expressing the preferred embodiments of the present invention, and are only used to illustrate the technical ideas and features of the present invention. The purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly, but they are not limited to the present invention alone, and the patent scope of the present invention cannot be limited only by this embodiment. That is, any equivalent changes or modifications made to the spirit disclosed by the present invention, for researchers or technicians in the field, without departing from the structure of the present invention, local improvements within the system and changes and transformations between subsystems, etc., are still within the patent scope of the present invention. At present, the technical solution of this application has been pilot-tested, that is, a small-scale experiment of the product before large-scale mass production; after the pilot test, a user use survey was conducted in a small range, and the survey results showed that the user satisfaction was high; now we are preparing for the formal production of the product for industrialization, including an intellectual property risk warning survey.

Claims

1. A cable trench drainage device, characterized in that: The invention comprises a water collection well (5) arranged beside a cable trench (7), a drainage outlet (8) arranged at the bottom of the cable trench (7) and connected to the water collection well (5), a submersible sewage pump (11) arranged at the bottom of the water collection well (5) and with a suction port facing downward, a second liquid level switch (10) arranged on the wall of the water collection well (5), and a first liquid level switch (9) arranged on the wall of the water collection well (5); the first liquid level switch (9) is arranged above the second liquid level switch (10), the first liquid level switch (9) is lower than the drainage outlet (8), the second liquid level switch (10) is higher than the impeller of the submersible sewage pump (11), the outlet pipe of the submersible sewage pump (11) is in a horizontal direction, the outlet pipe is connected to a drainage pipe (2), and the drainage pipe (2) is connected to an external rainwater pipe (1); A docking assembly (13) is provided between the drainage pipe (2) and the water outlet of the submersible sewage pump (11), the docking assembly (13) comprising a drainage flange (15) fixedly arranged at one end of the drainage pipe (2) close to the submersible sewage pump (11) and a pump flange (16) fixedly connected to the outer end of the drainage pipe (2) of the submersible sewage pump (11), a vertical slot is provided in the drainage flange (15), a notch is provided on one side of the drainage flange (15) close to the submersible sewage pump (11), when the outlet pipe of the submersible sewage pump (11) is connected to the drainage pipe (2), the pump flange (16) is inserted into the notch, and the drainage pipe (2) is located in the notch; A vertical slide rail (14) is fixedly arranged on the wall of the water collection well (5), a slider (17) is slidably connected to the slide rail (14), and the slider (17) is fixedly connected to the submersible sewage pump (11).

2. A cable trench drainage device according to claim 1, characterized in that: A stirring wheel (12) is provided below the impeller of the submersible sewage pump (11), and the stirring wheel (12) is fixedly connected to the shaft of the submersible sewage pump (11).

3. A cable trench drainage device according to claim 1, characterized in that: A filter box (18) with a top opening is detachably connected to the wall of the water collection well (5) below the drainage outlet (8); the side walls and the bottom of the filter box (18) are both provided with through holes; and the inner wall of the filter box (18) is paved with a filter net.

4. A cable trench drainage device according to claim 1, characterized in that: The drainage pipe (2) is connected to the top of the rainwater pipe (1).

5. A cable trench drainage device according to claim 1, characterized in that: The drainage pipe (2) is provided with a check valve (4).

6. A cable trench drainage device according to claim 1, characterized in that: The slide rails (14) are two parallel slide rails, the drainage pipe (2) is vertically arranged between the two slide rails (14), a connecting plate is fixedly arranged on one side of the slide rail (14) close to the wall of the water collection well (5), and the drainage pipe (2) and the wall of the water collection well (5) are fixedly connected to the connecting plate.

7. A cable trench drainage device according to claim 5, characterized in that: The check valve (4) is higher than the rainwater pipe (1).

8. A cable trench drainage device according to any one of claims 1 to 7, characterized in that: It also includes a controller, and the first liquid level switch (9), the second liquid level switch (10) and the submersible sewage pump (11) are all electrically connected to the controller.

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