A cable trench drainage system

Abstract

The utility model discloses a cable trench drainage system, including cable trench and water suction pump, the bottom of cable trench is provided with the water collecting tank, the inlet end of water suction pump is connected with the bottom of water collecting tank, be equipped with first water level sensor and be located the second water level sensor above first water level sensor in water collecting tank, first water level sensor and second water level sensor are linked with water suction pump respectively, when the water level in water collecting tank is located above second water level sensor, water suction pump starts, when the water level in water collecting tank is located below first water level sensor, water suction pump closes. The utility model discloses a cable trench drainage system has simple structure, security is good and the cable trench drainage system of long service life of water suction pump.

Description

Technical Field

[0001] This utility model relates to the field of drainage system technology, and in particular to a cable trench drainage system. Background Technology

[0002] Waterproofing cable trenches in power systems has always been a key concern. Power plants, regardless of type, are generally located far from urban areas without well-developed drainage networks. In southern provinces, torrential rains during the rainy season can cause flooding into cable trenches, necessitating a reliable drainage system for indoor cable trenches. While outdoor cables generally don't require consideration of water accumulation during construction, indoor cables stored in water for extended periods can corrode cable supports and sheaths, leading to decreased insulation and potential short circuits or other electrical leaks.

[0003] The existing drainage system is too rudimentary, lacking tiered water level warnings and heavily reliant on manual inspections. This not only increases the workload of maintenance personnel but also makes it difficult to detect and address water accumulation in a timely manner during extreme weather conditions such as heavy rain, posing a threat to the safe operation of the power system. Furthermore, the discharged water is generally not tested for water quality and is discharged directly as rainwater, posing an environmental safety hazard to environmentally conscious enterprises such as waste-to-energy plants. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a cable trench drainage system with simple structure, good safety and long service life of the water pump.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A cable trench drainage system includes a cable trench and a water pump. A water collection tank is provided at the bottom of the cable trench. The inlet end of the water pump is connected to the bottom of the water collection tank. A first water level sensor and a second water level sensor located above the first water level sensor are provided in the water collection tank. The first water level sensor and the second water level sensor are respectively connected to the water pump. When the water level in the water collection tank is above the second water level sensor, the water pump starts. When the water level in the water collection tank is below the first water level sensor, the water pump stops.

[0006] As a further improvement to the above technical solution: The cable trench is equipped with a grating plate, and a third water level sensor is installed between the grating plate and the bottom of the cable trench. The third water level sensor is connected to an alarm. When the water level in the cable trench is above the third water level sensor, the alarm will issue an alarm signal.

[0007] The grating is installed on the trench walls on both sides of the cable trench.

[0008] The distance between the grating plate and the bottom of the cable trench is 15cm-25cm, and the distance between the third water level sensor and the bottom of the cable trench is 5cm-10cm.

[0009] The distance between the bottom of the water collection tank and the bottom of the cable trench is 40cm-60cm, the distance between the first water level sensor and the bottom of the cable trench is 5cm-10cm, and the distance between the second water level sensor and the bottom of the cable trench is 25cm-35cm.

[0010] Multiple water pumps are installed along the length of the cable trench.

[0011] The trough opening of the water collection tank is covered with a trough opening filter screen.

[0012] The cross-section of the water collection tank is U-shaped or V-shaped.

[0013] The outlet end of the water pump is connected to a drainage header, which is connected to a sorting drainage mechanism. A water quality sampling mechanism located upstream of the sorting drainage mechanism is provided on the drainage header.

[0014] The classified drainage system includes rainwater wells and sewage wells. The rainwater wells are connected to the main drainage pipe through a rainwater discharge valve, and the sewage wells are connected to the main drainage pipe through a sewage discharge valve.

[0015] Compared with the prior art, the advantages of this utility model are: 1. The cable trench drainage system of this utility model collects accumulated water through a water collection tank and uses a second water level sensor in conjunction with a water pump to drain the water. It can drain the water at the bottom of the trench in a timely manner, preventing the water level from rising to a level that could endanger the safety of the cables. The structure is simple and the safety is good. The first water level sensor, in conjunction with the water pump, can shut down the water pump in a timely manner to prevent the water pump from running dry and being damaged. The water pump has a long service life.

[0016] 2. In the cable trench drainage system of this utility model, since the third water level sensor is located above the bottom of the cable trench, that is, higher than the second water level sensor, when the water level in the cable trench reaches above the third water level sensor, it indicates that the water pump may fail or there may be a sudden large amount of water entering. At this time, the alarm (such as an audible and visual alarm, a buzzer, a warning light, etc.) will issue an alarm signal, and the staff can carry out maintenance or other treatments.

[0017] 3. The cable trench drainage system of this utility model allows accumulated water to be tested by a water quality sampling agency before being discharged by a classified drainage agency, thereby reducing the risk of environmental pollution. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the cable trench drainage system of this utility model.

[0019] Legend: 1. Cable trench; 11. Grating plate; 2. Water collection tank; 21. Trough filter screen; 3. Water pump; 41. First water level sensor; 42. Second water level sensor; 43. Third water level sensor; 5. Drainage main pipe; 51. Water quality sampling mechanism; 6. Classified drainage mechanism; 61. Rainwater well; 62. Sewage well; 63. Rainwater discharge valve; 64. Sewage discharge valve. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] like Figure 1As shown, the cable trench drainage system of this embodiment includes a cable trench 1 and a water pump 3. A water collection tank 2 is provided at the bottom of the cable trench 1. The inlet end of the water pump 3 is connected to the bottom of the water collection tank 2. A first water level sensor 41 and a second water level sensor 42 located above the first water level sensor 41 are provided in the water collection tank 2. The first water level sensor 41 and the second water level sensor 42 are respectively connected to the water pump 3. When the water level in the water collection tank 2 is above the second water level sensor 42, the water pump 3 starts. When the water level in the water collection tank 2 is below the first water level sensor 41, the water pump 3 shuts down.

[0025] In this embodiment of the cable trench drainage system, rainwater flows from the cable trench 1 into the collection tank 2 for collection. When the water level in the collection tank 2 rises above the second water level sensor 42 (e.g., a pressure-type or ultrasonic level sensor), the water pump 3 starts to drain the water from the collection tank 2. When the water level in the collection tank 2 drops below the first water level sensor 41 (e.g., a float switch, an electrode-type water level sensor, or a pressure-type water level sensor), the water pump 3 shuts off. This cable trench drainage system collects accumulated water in the collection tank 2 and uses the second water level sensor 42 in conjunction with the water pump 3 for drainage. It can promptly drain water from the bottom of the trench, preventing the water level from rising to a level that could endanger cable safety. The system has a simple structure and good safety. The first water level sensor 41, in conjunction with the water pump 3, can promptly shut off the water pump 3, preventing it from running dry and being damaged. The water pump 3 also has a long service life.

[0026] Preferably, in this embodiment, the first water level sensor 41 and the second water level sensor 42 are connected to the water pump 3 through a controller (such as a PLC, a small relay module, etc.) to realize water level detection and automatic start and stop of the pump, which has a high degree of automation.

[0027] Furthermore, in this embodiment, a grating plate 11 is provided inside the cable trench 1, and a third water level sensor 43 is provided between the grating plate 11 and the bottom of the cable trench 1. The third water level sensor 43 is connected to an alarm. When the water level in the cable trench 1 is above the third water level sensor 43, the alarm will sound an alarm signal. A layer of grating plate 11 (such as hot-dip galvanized steel grating plate, fiberglass grating plate, etc.) is laid inside the cable trench 1. At normal water levels, workers can walk and work safely on the grating plate 11, while allowing water to seep down. Since the third water level sensor 43 is located above the bottom of the cable trench 1, that is, higher than the second water level sensor 42, when the water level in the cable trench 1 reaches above the third water level sensor 43, it indicates that the water pump 3 may malfunction or there may be a sudden large amount of water entering. At this time, the alarm (such as an audible and visual alarm, buzzer, warning light, etc.) will sound an alarm signal, and workers can carry out maintenance or other treatments.

[0028] Preferably, in this embodiment, the alarm also includes a remote alarm module, which can be connected to the ECS system in the power plant and can remotely send alarm information to staff.

[0029] Furthermore, in this embodiment, the grating plate 11 is mounted on the trench walls on both sides of the cable trench 1, which has a simple structure and is reliably fixed.

[0030] Furthermore, in this embodiment, the distance between the grating plate 11 and the bottom of the cable trench 1 is 15cm-25cm, and the distance between the third water level sensor 43 and the bottom of the cable trench 1 is 5cm-10cm. Preferably, the distance between the grating plate 11 and the bottom of the cable trench 1 is 25cm, which allows for cable storage; the distance between the third water level sensor 43 and the bottom of the cable trench 1 is 10cm, making the third water level sensor 43 significantly higher than the second water level sensor 42, preventing the third water level sensor 43 from frequently malfunctioning due to insufficient pump capacity or other factors.

[0031] Further, in this embodiment, the distance between the bottom of the water collection tank 2 and the bottom of the cable trench 1 is 40cm-60cm, the distance between the first water level sensor 41 and the bottom of the cable trench 1 is 5cm-10cm, and the distance between the second water level sensor 42 and the bottom of the cable trench 1 is 25cm-35cm. Preferably, the distance between the bottom of the water collection tank 2 and the bottom of the cable trench 1 is 50cm, so that the water collection tank 2 has enough space to collect accumulated water; the distance between the first water level sensor 41 and the bottom of the cable trench 1 is 5cm, so that there is a little bottom water in the water collection tank 2 to prevent the water pump 3 from running dry; and the distance between the second water level sensor 42 and the bottom of the cable trench 1 is 30cm.

[0032] Furthermore, in this embodiment, multiple water pumps 3 are provided along the length of the cable trench 1. When the cable trench 1 is long, the water pumping effect is better by setting multiple water pumps 3. In this embodiment, multiple sets of the first water level sensor 41, the second water level sensor 42, and the third water level sensor 43 are also provided to adapt to the situation where the water depth is uneven when the cable trench 1 is long.

[0033] Furthermore, in this embodiment, the trough cover of the water collection tank 2 is equipped with a trough filter screen 21. The trough filter screen 21 can prevent large particles of debris from entering the water collection tank 2 and causing the water pump 3 to become clogged.

[0034] Furthermore, in this embodiment, the cross-section of the water collection tank 2 is U-shaped. The U-shaped water collection tank 2 allows water to collect at its bottom, facilitating extraction by the water pump 3. Of course, in other embodiments, the cross-section of the water collection tank 2 can also be V-shaped or other shapes.

[0035] Furthermore, in this embodiment, the outlet end of the water pump 3 is connected to a drainage header 5, which is connected to a classified drainage mechanism 6. A water quality sampling mechanism 51 located upstream of the classified drainage mechanism 6 is provided on the drainage header 5. Accumulated water can be tested by the water quality sampling mechanism 51 before being discharged by the classified drainage mechanism 6, thereby reducing the risk of environmental pollution.

[0036] The water sampling mechanism 51 can be a "tee" or "sampling short pipe" structure with a valve (such as a ball valve or gate valve) installed on the drain header 5. Closing the valve can intercept the water sample in the pipeline, and opening the valve can conveniently collect the water sample using a sampling container (such as a sampling bottle). The structure is simple and reliable.

[0037] Furthermore, in this embodiment, the classified drainage mechanism 6 includes a rainwater well 61 and a sewage well 62. The rainwater well 61 is connected to the main drainage pipe 5 via a rainwater drain valve 63, and the sewage well 62 is connected to the main drainage pipe 5 via a sewage drain valve 64. The water quality sampling mechanism 51 can periodically or as needed (such as after the alarm sounds) collect water samples at this sampling point and send them to the laboratory for testing to determine whether the accumulated water contains oil (possibly from equipment), corrosive substances (possibly from the environment or leaks), or other pollutants. If the accumulated water is polluted, the sewage drain valve 64 is opened to discharge it into the sewage well 62; if the accumulated water is not polluted, the rainwater drain valve 63 is opened to discharge it into the rainwater well 61.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make many possible variations and modifications to the technical solution of the present utility model using the methods and techniques disclosed above, or modify it into equivalent embodiments with equivalent changes, without departing from the spirit and technical solution of the present utility model. Therefore, any simple modifications, equivalent substitutions, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A cable trench drainage system, characterized in that: The system includes a cable trench (1) and a water pump (3). A water collection tank (2) is provided at the bottom of the cable trench (1). The inlet end of the water pump (3) is connected to the bottom of the water collection tank (2). A first water level sensor (41) and a second water level sensor (42) located above the first water level sensor (41) are provided in the water collection tank (2). The first water level sensor (41) and the second water level sensor (42) are respectively connected to the water pump (3). When the water level in the water collection tank (2) is above the second water level sensor (42), the water pump (3) is started. When the water level in the water collection tank (2) is below the first water level sensor (41), the water pump (3) is turned off.

2. The cable trench drainage system according to claim 1, characterized in that: The cable trench (1) is provided with a grid plate (11), and a third water level sensor (43) is provided between the grid plate (11) and the bottom of the cable trench (1). The third water level sensor (43) is connected to an alarm. When the water level in the cable trench (1) is above the third water level sensor (43), the alarm will issue an alarm signal.

3. The cable trench drainage system according to claim 2, characterized in that: The grating plate (11) is installed on the trench walls on both sides of the cable trench (1).

4. The cable trench drainage system according to claim 2, characterized in that: The distance between the grating plate (11) and the bottom of the cable trench (1) is 15cm-25cm, and the distance between the third water level sensor (43) and the bottom of the cable trench (1) is 5cm-10cm.

5. The cable trench drainage system according to claim 1, characterized in that: The distance between the bottom of the water collection tank (2) and the bottom of the cable trench (1) is 40cm-60cm, the distance between the first water level sensor (41) and the bottom of the cable trench (1) is 5cm-10cm, and the distance between the second water level sensor (42) and the bottom of the cable trench (1) is 25cm-35cm.

6. The cable trench drainage system according to claim 1, characterized in that: Multiple water pumps (3) are provided along the length of the cable trench (1).

7. The cable trench drainage system according to claim 1, characterized in that: The water collection tank (2) is covered with a tank opening filter screen (21).

8. The cable trench drainage system according to claim 1, characterized in that: The cross-section of the water collection tank (2) is U-shaped or V-shaped.

9. The cable trench drainage system according to any one of claims 1 to 8, characterized in that: The outlet end of the water pump (3) is connected to a drainage header (5), the drainage header (5) is connected to a sorting drainage mechanism (6), and a water quality sampling mechanism (51) located upstream of the sorting drainage mechanism (6) is provided on the drainage header (5).

10. The cable trench drainage system according to claim 9, characterized in that: The classified drainage mechanism (6) includes a rainwater well (61) and a sewage well (62). The rainwater well (61) is connected to the main drainage pipe (5) through a rainwater discharge valve (63), and the sewage well (62) is connected to the main drainage pipe (5) through a sewage discharge valve (64).

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