Water collecting and draining system matched with groove downcast tube well

Abstract

The utility model relates to a water collection and drainage system matched with a groove downcast tube well. Comprising a movable carrier, a water tank and a desanding device are installed on the movable carrier, and an overflow opening is formed in the side wall of the water tank and connected to a main drainage pipe through a branch drainage pipe; the desanding device comprises a cyclone desanding tank, a water outlet pipe of the cyclone desanding tank is connected to a top water inlet of the water tank, a mud and sand collecting tank used for receiving mud and sand is further arranged below the cyclone desanding tank, a blow-down valve is installed at the bottom of the mud and sand collecting tank, and a plurality of pipeline connectors are installed on a water inlet pipe of the cyclone desanding tank. A T-shaped connector pipe device is arranged at a well mouth of the downcast tube well, an outlet of a lifting pump in the downcast tube well is connected with a bottom connector of the T-shaped connector pipe device through a lifting pipeline, and a top connector of the T-shaped connector pipe device is connected with a pipeline connector through a drainage pipeline. The water tank pumps water from the pipe washing water pump, and an outlet of the pipe washing water pump is connected to a side connector of the T-shaped connector pipe device through a pipe washing pipeline. The length of a drainage pipeline between the drainage pipe well and the drainage pipe well is shortened, an intermittent pipe flushing function is provided for the drainage pipeline, and the problem of disability caused by pipe blockage by mud and sand is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of drainage system technology, and in particular relates to a drainage system for trench dewatering pipe wells. Background Technology

[0002] During the construction of water diversion pipelines, it is necessary to excavate pipeline trenches. In areas with shallow groundwater and sandy soil layers, in order to ensure dry trench operations, it is necessary to lower the groundwater level, and the well dewatering method is often used. A well dewatering drainage system generally includes dewatering wells, pumping devices, and drainage pipes, etc. Each dewatering well is equipped with a separate drainage pipe to discharge groundwater.

[0003] If drainage around the trench is inconvenient and the drainage distance is long, each manhole requires a long drainage pipeline. During operation, the following problems arise: due to the long pipeline, in scenarios where the water volume in the manhole is insufficient, the flow rate within the pipeline is low. This causes sediment in the drainage to settle within the pipeline, reducing the effective cross-section of the pipeline and ultimately leading to pipeline failure (i.e., inability to continue drainage). Therefore, a drainage system needs to be developed to solve the aforementioned technical problems. Utility Model Content

[0004] The purpose of this utility model is to provide a drainage system that is compatible with trench dewatering manholes, shortens the length of the drainage pipeline between the manhole and the dewatering manhole, and provides an intermittent flushing function for the drainage pipeline to avoid the failure problem caused by mud and sand blocking the pipeline.

[0005] The technical solution adopted by this utility model is as follows: a drainage system for trench dewatering manholes, including a mobile carrier, on which a water tank and a sand removal device are installed. The side wall of the water tank is provided with an overflow port, which is connected to the main drainage pipe through a drainage branch pipe. The sand removal device includes a cyclone sand removal tank, the outlet pipe of which is connected to the top inlet of the water tank. Below the cyclone sand removal tank, there is a sand collection tank for receiving sand. A drain valve is installed at the bottom of the sand collection tank. Multiple pipe joints are installed on the inlet pipe of the cyclone sand removal tank. A T-type interface pipe device is provided at the wellhead of the dewatering manhole. The outlet of the lift pump in the dewatering manhole is connected to the bottom interface of the T-type interface pipe device through a lift pipeline. The top interface of the T-type interface pipe device is connected to the pipe joint through a drainage pipeline. It also includes a flushing water pump that draws water from the water tank. The outlet of the flushing water pump is connected to the side interface of the T-type interface pipe device through a flushing pipeline.

[0006] Preferably, a carrier support is installed on the mobile carrier, the cyclone desanding tank is installed on the upper part of the carrier support, and the mud and sand collection tank is installed on the lower part of the carrier support.

[0007] Preferably, the cyclone sand removal tank includes a first cyclone sand removal tank and a second cyclone sand removal tank arranged in parallel. The water inlet pipe is connected to the side water inlets of both at the same time, and the water outlet pipe is connected to the top water outlets of both at the same time. A connecting pipe is provided between the middle parts of the water inlet pipe and the water outlet pipe, and a first gate valve is provided on the connecting pipe. A second gate valve is provided on the water inlet pipe between the two connection positions of the connecting pipe and the side water inlet of the first cyclone sand removal tank. A third gate valve is provided on the water outlet pipe between the two connection positions of the connecting pipe and the top water outlet of the second cyclone sand removal tank.

[0008] Preferably, the T-shaped interface pipe device consists of a wellhead support and a T-shaped interface pipe. The wellhead support is installed and fixed at the wellhead of the downcomer well, and the T-shaped interface pipe is located at the center of the wellhead support.

[0009] Preferably, the side of the sand and mud collection tank is open and equipped with an openable tank cover.

[0010] The advantages and positive effects of the present utility model are:

[0011] The present utility model provides a supporting drainage system for a trench downcomer well. Compared with the existing drainage system, the supporting drainage system in the present utility model is equipped with a sand removal device. The lift pump in the downcomer well pumps the water collected in the well into the cyclone sand removal tank of the sand removal device. The sand removal device removes most of the sand and mud contained in the water to make the drainage clear. In this way, the water with reduced sand and mud content will not cause pipe blockage problems due to sand and mud settlement inside the drainage main pipe during the subsequent drainage along the drainage main pipe. On the other hand, this supporting drainage system is equipped with a water tank and uses an intermittent-start flushing water pump to transport the stored water in the water tank to the T-shaped interface pipe device located at the wellhead of the downcomer well through a flushing pipeline, using the water source in the water tank as the flushing water source to flush the drainage pipeline, promoting the separation of the settled sand and mud in the pipe and transferring them to the subsequent process, and can effectively avoid pipe blockage problems in the drainage pipeline. Therefore, the supporting drainage system for this trench downcomer well can effectively avoid the incapacitation problems caused by sand and mud pipe blockage.

[0012] Furthermore, the supporting drainage system for this trench downcomer well uses a mobile carrier such as an engineering vehicle to transport the sand removal device and the water tank. When arranging the drainage system on site, each set of systems can be matched with multiple corresponding downcomer wells. Due to the mobility flexibility of the mobile carrier, the mobile carrier can fully approach the downcomer well, which can shorten the length of the drainage pipeline, improve the smoothness of the drainage path, and further avoid pipe blockage problems. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is Figure 1 the three-dimensional structural diagram of the sand removal device in

[0015] In the picture:

[0016] 1. Drainage main pipe; 2. Drainage branch pipe; 3. Water tank; 4. Mobile vehicle; 5. Flushing pump; 6. Flushing pipeline; 7. Mud and sand collection tank; 8. Vehicle support; 9. Second cyclone sand separator; 10. Outlet pipe; 11. Third gate valve; 12. First gate valve; 13. Second gate valve; 14. Inlet pipe; 15. Pipe joint; 16. First cyclone sand separator; 17. Tank cover; 18. Sewage valve; 19. Drainage pipeline; 20. T-type interface pipe device; 21. Dewatering well; 22. Lifting pipeline; 23. Lifting pump; 24. Trench. Detailed Implementation

[0017] To further understand the invention content, features and effects of this utility model, the following embodiments are provided in detail.

[0018] Please see Figure 1 and Figure 2 This utility model relates to a trench dewatering pipe well and its supporting collection and drainage system, which includes a mobile vehicle 4 on which a water tank 3 and a sand removal device are installed. The mobile vehicle 4 can be an engineering vehicle equipped with a generator, providing flexibility in movement on the construction site and powering the electrical components of the collection and drainage system. Figure 1 As shown, a dewatering manhole 21 is provided on the side of the trench 24. When the drainage system is arranged on site, the mobile vehicle 4 transports the water tank 3 and the sand removal device to a position close to the dewatering manhole 21, and each drainage system is equipped with multiple dewatering manholes 21.

[0019] The side wall of the water tank 3 is provided with an overflow port, which is connected to the main drainage pipe 1 via a drainage branch pipe 2. The main drainage pipe 1 is located at the construction site and is used to receive drainage from multiple sets of drainage systems deployed on site and to transport the drainage to designated locations. The water generated by each set of drainage systems is stored in the water tank 3. When the liquid level in the water tank 3 rises to the height of the overflow port, the water in the tank overflows and is transferred to the main drainage pipe 1 via the drainage branch pipe 2.

[0020] The sand removal device includes a cyclone sand separator. The outlet pipe 10 of the cyclone sand separator is connected to the top inlet of the water tank 3. Below the cyclone sand separator, there is a sand collection tank 7 for receiving sand. A drain valve 18 is installed at the bottom of the sand collection tank 7. Multiple pipe joints 15 are installed on the inlet pipe 12 of the cyclone sand separator. The function of the cyclone sand separator is to remove sand from the drainage by cyclone flow, reducing the sand content in the drainage. The water after cyclone sand removal enters the outlet pipe 10 and then enters the water tank 3. The sand produced by cyclone sand removal settles to the bottom and eventually enters the sand collection tank 7 below. The drain valve 18 is opened periodically to discharge the sand inside.

[0021] In this embodiment, a carrier support 8 is installed on the mobile carrier 4, a cyclone sand removal tank is installed on the upper part of the carrier support 8, and a mud and sand collection tank 7 is installed on the lower part of the carrier support 8.

[0022] In this embodiment, the mud and sand collection tank 7 has an open side and is equipped with an openable tank cover 17. When the mud and sand in the tank become compacted or hardened, making it impossible to be discharged smoothly through the drain valve 18, the side tank cover 17 can be opened and the tank can be rinsed and cleaned with high-pressure water.

[0023] A T-type interface pipe device 20 is provided at the wellhead of the dewatering pipe well 21. The outlet of the lifting pump 23 in the dewatering pipe well 21 is connected to the bottom interface of the T-type interface pipe device 20 through the lifting pipeline 22. The top interface of the T-type interface pipe device 20 is connected to the pipe joint 15 through the drainage pipeline 19.

[0024] It also includes a flushing water pump 5 that draws water from the water tank 3. The outlet of the flushing water pump 5 is connected to the side interface of the T-type interface pipe device 20 through the flushing pipeline 6. The flushing water pump 5 is started intermittently, and the water in the water tank 3 is transported to the T-type interface pipe device 20 through the flushing pipeline 6. This part of the water enters the drainage pipeline 19, thus flushing the drainage pipeline 19, promoting the separation of the sediment in the pipe from the pipe wall, and transferring it to the rear and reaching the sand removal device.

[0025] In this embodiment, the T-type interface pipe device 20 consists of a wellhead support and a T-type interface pipe. The wellhead support is installed and fixed at the wellhead of the dewatering pipe well 21 to prevent arbitrary movement, and the T-type interface pipe is located at the center of the wellhead support.

[0026] The cyclone sand separator includes a first cyclone sand separator 16 and a second cyclone sand separator 9 arranged side by side. An inlet pipe 14 is connected to the side inlets of both separators, and an outlet pipe 10 is connected to the top outlets of both separators. A connecting pipe is provided between the middle of the inlet pipe 14 and the outlet pipe 10, and a first gate valve 12 is provided on the connecting pipe. A second gate valve 13 is provided on the inlet pipe 14, between the connecting pipe and the side inlet of the first cyclone sand separator 16, and a third gate valve 11 is provided on the outlet pipe 10, between the connecting pipe and the top outlet of the second cyclone sand separator 9.

[0027] The aforementioned structure allows the first cyclone sand separator 16 and the second cyclone sand separator 9 to operate in series or in parallel. Series connection improves the sand separator's performance, suitable for applications with high sediment content in the wastewater. Parallel connection improves the overall efficiency of the sand separator, suitable for applications with low sediment content. Specifically, when two cyclone sand separators are connected in series, the second gate valve 13 and the third gate valve 11 are closed, and the first gate valve 12 is opened. The wastewater first enters the first cyclone sand separator 16, undergoes one cyclone sand separator treatment, and then enters the second cyclone sand separator 9 via the connecting pipe and the front section of the inlet pipe 14 for a second cyclone sand separator treatment. When two cyclone sand separators are connected in parallel, the second gate valve 13 and the third gate valve 11 are opened, and the first gate valve 12 is closed. The wastewater then simultaneously enters both the first cyclone sand separator 16 and the second cyclone sand separator 9.

[0028] Operation process:

[0029] Drainage main pipe 1 is laid out at the construction site. Drainage main pipe 1 should pass through the layout area of ​​dewatering pipe well 21. Multiple sets of mobile vehicles 4 and their water tanks 3 and sand removal devices are transferred and parked near the dewatering pipe well 21. Each set of drainage system is matched with multiple dewatering pipe wells 21. A lift pump 23 and a lift pipeline 22 are installed in the dewatering pipe well 21. A T-type interface pipe device 20 is installed at the wellhead. The lift pipeline 22 is connected to the bottom interface of the T-type interface pipe. The top structure of the T-type interface pipe is connected to the pipe joint 15 by the drainage pipeline 19. The flushing pump 5 is connected to the side interface of the T-type interface pipe by the flushing pipeline 6. The overflow port of the water tank 3 is connected to the drainage main pipe 1 on site through the drainage branch pipe 2.

[0030] Groundwater around trench 24 enters dewatering well 21. Lift pump 23 is started intermittently, transporting the collected water in the well to the cyclone desanding tank via lift pipeline 22 and drainage pipeline 19. The treated water enters water tank 3, and the mud and sand flow downward into mud and sand collection tank 7. The water in water tank 3 overflows into drainage main pipe 1 via drainage branch pipe 2. The drain valve 18 is opened periodically to discharge the mud and sand (slurry state) in mud and sand collection tank 7. The flushing pump 5 is started intermittently. When it starts, it pumps the water in water tank 3 to T-type interface pipe via flushing pipeline 6 to flush drainage pipeline 19, promoting the shedding of settled mud and sand in the pipe and its subsequent transfer.

Claims

1. A drainage system for trench dewatering pipe wells, characterized in that: The system includes a mobile vehicle (4), on which a water tank (3) and a sand removal device are installed. An overflow port is provided on the side wall of the water tank (3), and the overflow port is connected to the main drainage pipe (1) via a drainage branch pipe (2). The sand removal device includes a cyclone sand removal tank, the outlet pipe (10) of which is connected to the top inlet of the water tank (3). Below the cyclone sand removal tank, a sand collection tank (7) for receiving sand is also provided. A drain valve (18) is installed at the bottom of the sand collection tank (7), and a drain pipe (14) is installed on the inlet pipe (14) of the cyclone sand removal tank. Multiple pipe joints (15); a T-type interface pipe device (20) is provided at the wellhead of the dewatering pipe well (21). The outlet of the lifting pump (23) in the dewatering pipe well (21) is connected to the bottom interface of the T-type interface pipe device (20) through the lifting pipeline (22). The top interface of the T-type interface pipe device (20) is connected to the pipe joint (15) through the drainage pipeline (19). It also includes a flushing water pump (5) that draws water from the water tank (3). The outlet of the flushing water pump (5) is connected to the side interface of the T-type interface pipe device (20) through the flushing pipeline.

2. The trench dewatering pipe well and supporting collection and drainage system as described in claim 1, characterized in that: in A carrier support (8) is installed on the mobile carrier (4), a cyclone desanding tank is installed on the upper part of the carrier support (8), and a mud and sand collection tank (7) is installed on the lower part of the carrier support (8).

3. The trench dewatering pipe well and supporting collection and drainage system as described in claim 2, characterized in that: The cyclone sand separator includes a first cyclone sand separator (16) and a second cyclone sand separator (9) arranged in parallel. The inlet pipe (14) is connected to the side inlet of both and the outlet pipe (10) is connected to the top outlet of both. A connecting pipe is provided between the middle of the inlet pipe (14) and the outlet pipe (10), and a first gate valve (12) is provided on the connecting pipe. A second gate valve (13) is provided on the inlet pipe (14) and between the two connection positions of the connecting pipe and the side inlet of the first cyclone sand separator (16). A third gate valve (11) is provided on the outlet pipe (10) and between the two connection positions of the connecting pipe and the top outlet of the second cyclone sand separator (9).

4. The trench dewatering pipe well and supporting collection and drainage system as described in claim 3, characterized in that: The T-type interface pipe device (20) consists of a wellhead support and a T-type interface pipe. The wellhead support is installed and fixed at the wellhead of the dewatering pipe well (21), and the T-type interface pipe is located at the center of the wellhead support.

5. The trench dewatering pipe well and supporting drainage system as described in claim 4, characterized in that: The mud and sand collection tank (7) has an open side and is fitted with an openable lid (17).

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