Dredging device for underground drainage

Abstract

The desilting device comprises an overflow separation box, a water inlet connecting pipe is arranged on the top surface of the overflow separation box in a communicated mode, a water outlet connecting pipe is arranged at the top end of the surface of one side of the overflow separation box in a communicated mode, and a partition plate is arranged on the inner wall of the top of the overflow separation box. A gap is formed between the bottom end of the partition plate and the inner wall of the bottom of the overflow separation box, the interior of the overflow separation box is divided into a precipitation cavity and an overflow cavity through the partition plate, the precipitation cavity and the overflow cavity are communicated through the gap, a sand conveying assembly is arranged on the other side of the overflow separation box, and the sand conveying assembly is communicated with the bottom end of the precipitation cavity; the sand conveying assembly is further connected with the surface of one side of the overflow separation box through a plurality of backflow connecting pieces, and by means of the top water inlet and side wall water outlet layout of the overflow separation box and the combination of partition plate cavity division and gap overflow channels, silt is settled, water is discharged, filter plate blockage and brush disturbance are avoided, the separation efficiency is improved, and the equipment failure risk is reduced.

Description

Technical Field

[0001] This utility model relates to the field of mine drainage, and more specifically, to a dredging device for underground drainage. Background Technology

[0002] Due to the complex geological conditions in mines, seepage and water accumulation are highly likely. As an essential component of mine operations, the drainage system's safety and reliability directly impact mine safety and production efficiency. To address this, patent application number CN202122920508.1 provides a mine underground drainage device, comprising: a filter box, and a pump connected to the bottom of the filter box. The filter box includes, from top to bottom, a spiral stirring chamber, a partition plate, and the filter chamber itself. A water inlet pipe connects to the top of the spiral stirring chamber, which contains a spiral stirring blade driven by a motor. A first sand outlet is located on the side of the spiral stirring chamber away from the motor. Through holes are provided on the partition plate, and the pump connects to the filter chamber via an outlet pipe. This utility model mine underground drainage device has a simple structure and is easy to operate. It facilitates dual filtration of debris in accumulated water, preventing debris from entering the pump and causing damage.

[0003] The above design also has shortcomings; the device lacks a cleaning component for the filter plate, making the filter plate prone to clogging. Therefore, patent application number CN202420283780.4 discloses a well drainage device for easy dredging, including a filter box and filter plates. The filter box has an inclined filter plate installed at its lower part, and a cleaning component is installed at one end of the filter box. The cleaning component includes a column, a power supply, an electric cylinder, a mounting plate, a sealing gasket, a first bolt, a piston rod, an assembly plate, a brush, a limiting plate, a socket, and a top plate. The mounting plate is fixedly fitted onto the outer side of the column near the filter box, and the mounting plate is fixedly connected to one end of the filter box by the first bolt. The inner wall of the filter box near the column has a groove, and the assembly plate and brush are located within the groove. The column has a mounting cavity, and the filter box near the column has a through hole for the piston rod to pass through. Through the design of the cleaning component, the filter plates inside the filter box can be cleaned, thus enabling the filter box to have a cleaning function and improving its practicality.

[0004] However, the above solution still has certain drawbacks. The inventors discovered that, based on the original solution, a cylinder-driven brush is installed on the filter plate to perform reciprocating motion, continuously brushing the filter plate surface to achieve cleaning and self-cleaning. However, the brush's cleaning effect is only to a certain extent. The mechanical force generated by the brush's reciprocating motion may force silt stuck in the filter holes through the filter plate and into the pumping equipment with the water flow, leading to impeller wear, pipe blockage, or even equipment malfunction.

[0005] How to invent a dredging device for well drainage to improve these problems has become an urgent problem for those skilled in the art. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a sludge removal device for well drainage, which aims to improve the existing well drainage devices that are prone to filter blockage due to filtration, which affects pumping efficiency, and the incomplete separation of water and silt, which can easily allow sand particles to enter the pumping equipment and cause equipment failure.

[0007] This utility model is implemented as follows: A sludge removal device for well drainage includes an overflow separation box. An inlet pipe is connected to the top surface of the overflow separation box, and an outlet pipe is connected to the top of one side surface of the overflow separation box. A partition is provided on the inner wall of the top of the overflow separation box, and a gap is provided between the bottom end of the partition and the inner wall of the bottom of the overflow separation box. The partition divides the interior of the overflow separation box into a sedimentation chamber and an overflow chamber, which are connected through the gap. A sand conveying assembly is provided on the other side of the overflow separation box, and the sand conveying assembly is connected to the bottom end of the sedimentation chamber. The sand conveying assembly and one side surface of the overflow separation box are also connected by several return flow connectors.

[0008] In a preferred embodiment of this utility model, an operation port is provided on the front surface of the overflow separation box, and a sealing box door is rotatably connected to one side edge of the operation port. A locking mechanism that can cooperate with the sealing box door and the overflow separation box is provided.

[0009] In a preferred embodiment of this utility model, a transparent viewing window is embedded on the surface of the sealed box door.

[0010] In a preferred embodiment of this utility model, a plurality of opposing and staggered sand baffles are integrally provided on the inner walls of both sides of the overflow chamber, and each sand baffle is inclined at an angle toward the bottom inner wall of the overflow separation box.

[0011] In a preferred embodiment of this utility model, a plurality of opposing and staggered buffer guide plates are integrally arranged on the inner walls of both sides of the sedimentation chamber, and each buffer guide plate is also inclined at an angle toward the bottom inner wall of the overflow separation box.

[0012] In a preferred embodiment of this utility model, the bottom inner wall of the overflow separation box is configured as a guide slope, and the height of the guide slope near the overflow cavity is higher than the height of the end near the sand conveying component.

[0013] In a preferred embodiment of this utility model, the sand conveying assembly includes an L-shaped conveying pipe. One horizontal end of the L-shaped conveying pipe is connected to the bottom end of the surface of the overflow separation box away from the outlet water connection pipe. A drive motor is fixedly installed on the outer wall of one side of the L-shaped conveying pipe. The output shaft of the drive motor extends through a sealing hole to the vertical interior of the L-shaped conveying pipe and is fixedly connected to one end of a rotating shaft. The rotating shaft is coaxial with the vertical portion of the L-shaped conveying pipe, and a spiral conveying slurry is integrally provided on the outer wall of the rotating shaft.

[0014] In a preferred embodiment of this utility model, the vertical height of the L-shaped conveying pipe at its top is higher than the height of the rotating shaft.

[0015] In a preferred embodiment of this utility model, the top end of the L-shaped conveying pipe is configured with an arc-shaped curved structure.

[0016] In a preferred embodiment of this utility model, each of the reflux connectors is a reflux pipe. A plurality of reflux pipes are disposed between the L-shaped conveying pipe and one side surface of the overflow separation box and are evenly distributed along the vertical extension direction of the L-shaped conveying pipe. One end of each reflux pipe is connected to the interior of the L-shaped conveying pipe, and the other end of each reflux pipe is connected to the sedimentation chamber inside the overflow separation box. A filter screen is fixedly connected between the inner wall of the end of each reflux pipe connected to the L-shaped conveying pipe.

[0017] The beneficial effects of this utility model are as follows: This utility model provides a sludge removal device for well drainage, which, through the above design, divides the overflow separation tank into a sedimentation chamber and an overflow chamber by using an inlet pipe at the top of the overflow separation tank and an outlet pipe at the top of the side wall, combined with a partition. An overflow channel is formed by the gap at the bottom of the partition, allowing sand-laden water to enter the sedimentation chamber where the silt settles. The separated water is then discharged through the outlet pipe. This avoids the problems of filter plate clogging and silt penetration caused by brush disturbance, improves the thoroughness of solid-liquid separation, reduces the wear and malfunction risk of pumping equipment due to silt intake, and achieves efficient and stable water-sand separation during well drainage sludge removal. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional schematic diagram of the overall structure provided by the embodiment of this utility model;

[0020] Figure 2A three-dimensional schematic cross-sectional view of the embodiment of this utility model;

[0021] Figure 3 A three-dimensional schematic cross-sectional view of the overflow separation box provided for an embodiment of this utility model;

[0022] Figure 4 A three-dimensional schematic cross-sectional view of the reflux pipe provided for an embodiment of this utility model.

[0023] In the diagram: 1-Overflow separation box; 2-Sand conveying assembly; 3-Return pipe; 101-Sealed box door; 102-Inlet water connection pipe; 103-Outlet water connection pipe; 104-Baffle plate; 105-Sand baffle plate; 106-Guide slope; 107-Buffer guide plate; 201-L-shaped conveying pipe; 202-Drive motor; 203-Rotating shaft; 204-Spiral conveying slurry; 301-Filter screen. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] Please see Figures 1 to 4 This utility model provides a technical solution: a sludge removal device for well drainage, including an overflow separation box 1. An inlet connection pipe 102 is connected to the top surface of the overflow separation box 1, and an outlet connection pipe 103 is connected to the top of one side surface of the overflow separation box 1. A partition 104 is provided on the inner wall of the top of the overflow separation box 1. A gap is provided between the bottom end of the partition 104 and the bottom inner wall of the overflow separation box 1. The partition 104 divides the interior of the overflow separation box 1 into a sedimentation chamber and an overflow chamber, which are connected through the gap. A sand conveying component 2 is provided on the other side of the overflow separation box 1. The sand conveying component 2 is connected to the bottom end of the sedimentation chamber. The sand conveying component 2 and one side surface of the overflow separation box 1 are also connected by several return connection parts.

[0026] Please see Figure 1 An operation port is provided on the front surface of the overflow separation box 1. A sealing box door 101 is rotatably connected to one edge of the operation port. A locking mechanism that can cooperate with the sealing box door 101 and the overflow separation box 1 is provided.

[0027] A sealing ring is embedded at the edge of the operating port, which engages with the sealing door 101 via a locking mechanism. The surface of the sealing door is treated with rust prevention. Maintenance personnel can remove stubborn silt (such as clumps of cemented mud) accumulated at the bottom of the sedimentation chamber through the operating port without disassembling the pipeline, thus improving ease of use.

[0028] Furthermore, a transparent viewing window is embedded in the surface of the sealed door 101.

[0029] The transparent viewing window of the sealed box door 101 is made of laminated explosion-proof glass. The window covers the sedimentation chamber and overflow chamber areas, allowing direct observation of the sedimentation inside the sedimentation chamber, the silt deposition at the bottom of the overflow separation box 1, and the water overflow in the overflow chamber from the outside of the overflow separation box 1. In some cases, if the silt does not enter the sand conveying component 2 in time, it may block the gap at the bottom of the partition 104 and affect the water overflow treatment. The staff can detect and deal with this in time through the viewing window.

[0030] Please see Figure 2 and Figure 3 Several opposing and staggered sand baffles 105 are integrally installed on the inner walls of both sides of the overflow chamber, and each sand baffle 105 is inclined at an angle toward the bottom inner wall of the overflow separation box 1.

[0031] Several sets of sand-bearing plates 105 are staggered on both sides of the overflow chamber's inner walls. Each set consists of two steel plates inclined at 55°, forming a zigzag flow channel. When water flows from the sedimentation chamber into the overflow chamber, it rises at a relatively slow speed, and the fine sand it carries impacts the bottom surface of the sand-bearing plate 105 due to inertia and falls back into the sedimentation chamber. The edges of the sand-bearing plates 105 are rounded to reduce the resistance to water flow. The staggered spacing of adjacent sand-bearing plates 105 is 15cm, forcing the water flow to form turbulent micro-vortices, promoting the agglomeration of fine sand into flocs and accelerating sedimentation.

[0032] Furthermore, several opposing and staggered buffer guide plates 107 are integrally provided on the inner walls of both sides of the sedimentation chamber, and each buffer guide plate 107 is also inclined at an angle toward the bottom inner wall of the overflow separation box 1.

[0033] Six sets of buffer guide plates 107 are arranged on the inner walls of both sides of the sedimentation chamber, distributed at a 30° angle. The sand-laden water flows through the first buffer guide plate 107, forming a downward oblique flow to avoid impacting the already settled silt layer. A gradually expanding flow channel is formed between the buffer guide plates 107, causing boundary layer separation along the plate surface, where fine sand settles under the action of eddies. The buffer guide plates 107 are made of stainless steel with a textured surface treatment to enhance the water flow resistance while reducing algae adhesion and extending maintenance intervals.

[0034] Furthermore, the bottom inner wall of the overflow separation box 1 is configured as a guide slope 106, and the height of the guide slope 106 near the overflow cavity is higher than the height of the end near the sand conveying component 2.

[0035] The lowest point of the guide slope 106 at the bottom of the overflow separator 1 is located directly below the inlet of the horizontal section of the L-shaped conveying pipe 201. Under the action of gravity, the silt in the sedimentation chamber slides along the slope towards the sand conveying port, forming a sliding layer. This increases the speed at which the deposited silt moves towards the L-shaped conveying pipe 201, reducing the possibility of the overflow chamber being blocked.

[0036] Furthermore, the sand conveying assembly 2 includes an L-shaped conveying pipe 201. One horizontal end of the L-shaped conveying pipe 201 is connected to the bottom end of the surface of the overflow separation box 1 away from the outlet water connection pipe 103. A drive motor 202 is fixedly installed on the outer wall of one side of the L-shaped conveying pipe 201. The output shaft of the drive motor 202 extends through a sealing hole to the vertical interior of the L-shaped conveying pipe 201 and is fixedly connected to one end of the rotating shaft 203. The rotating shaft 203 is coaxially arranged with the vertical part of the L-shaped conveying pipe 201. A spiral conveying slurry 204 is integrally provided on the outer wall of the rotating shaft 203.

[0037] The L-shaped conveying pipe 201 uses seamless steel pipe to ensure sealing, and the horizontal section inlet has a flared transition to reduce resistance to silt entry. The drive motor 202 has its speed controlled by a frequency converter, and its output shaft extends into the pipe via a mechanical seal, connecting to the spiral conveying slurry 204. The spiral conveying slurry 204 has a gradually changing pitch, creating a squeezing and dewatering effect. Water remains inside the L-shaped conveying pipe 201, while silt and other foreign matter are conveyed to the outside through the top outlet, achieving the separation process.

[0038] Furthermore, the vertical height of the L-shaped conveying pipe 201 to its top is higher than the height of the rotating shaft 203.

[0039] The top of the vertical section of the L-shaped conveying pipe 201 is higher than the center of the outlet connecting pipe 103, creating a liquid level difference. When the system is shut down, the L-shaped conveying pipe 201 and the overflow separation box 1 form a communicating vessel, ensuring a stable water level in the vertical section and preventing water from overflowing. During operation, the axial thrust generated by the screw conveyor 204 balances the static pressure of the liquid level difference. When the rotation speed is low, the water rises slowly, and after filtration through the return pipe 3, virtually no water is discharged from the top.

[0040] Furthermore, the top end of the L-shaped delivery pipe 201 is configured with an arc-shaped curved structure.

[0041] The L-shaped conveying pipe 201 features an arc-shaped curved structure at its top. When silt is pushed to the top by the spiral conveying slurry 204, it undergoes centrifugal motion along the inner wall of the arc. Due to inertia, the sand particles adhere tightly to the pipe wall and slide down the arc surface for discharge, avoiding the "throwing" phenomenon commonly seen in straight pipe openings. The arc-shaped structure also physically blocks any water that may rise. After reaching the top of the arc, the water falls back due to gravity, and in conjunction with the uppermost return pipe 3, it achieves reflux, improving the thoroughness of separation.

[0042] Please see Figure 4Each return connection is a return pipe 3. Several return pipes 3 are arranged between the L-shaped conveying pipe 201 and one side surface of the overflow separation box 1 and are evenly distributed along the vertical extension direction of the L-shaped conveying pipe 201. One end of each return pipe 3 is connected to the inside of the L-shaped conveying pipe 201, and the other end of each return pipe 3 is connected to the sedimentation chamber inside the overflow separation box 1. A filter screen 301 is fixedly connected between the inner wall of the end of each return pipe 3 and the end of the L-shaped conveying pipe 201.

[0043] The return pipe 3 is made of seamless steel pipe and is evenly arranged along the vertical section of the L-shaped conveying pipe 201. The bottom layer is 50cm from the inlet of the horizontal section, and the top layer is 80cm from the top. Each layer of return pipe 3 is installed at a 60° angle to the axis of the spiral pipe, facing the direction of propeller rotation, and uses centrifugal force to throw water towards the filter screen 301. The water passes through the filter screen 301 and returns to the sedimentation chamber.

[0044] Working principle: The inlet pipe 102 is connected to the pumping pipe, and the outlet pipe 103 is connected to the pumping equipment. Water enters the overflow separation box 1 through the inlet pipe 102 and settles in the sedimentation chamber. Water gradually enters the overflow chamber through the gap between the bottom of the baffle 104 and the bottom inner wall of the overflow separation box 1, and then enters the pumping equipment through the outlet pipe 103 and is discharged. Several opposing and staggered sand baffles 105 in the overflow chamber can prevent silt from rising and spreading into the pumping equipment. The buffer guide plate 107 in the sedimentation chamber can guide the water flow and reduce the flow velocity to avoid the impact of subsequent water flow on the sedimented silt and affect the sedimentation effect. The deposited silt is guided by the guide slope 106 and gradually enters the horizontal end of the L-shaped conveying pipe 201 after accumulating to a certain extent, and then gradually moves towards the vertical part of the L-shaped conveying pipe 201. At the same time, the water in the sedimentation chamber will also... Similarly, when the silt and water enter the vertical section of the L-shaped conveying pipe 201, the drive motor 202 drives the rotating shaft 203 to rotate. The spiral conveying slurry 204 set on the outer wall of the rotating shaft 203 transports the silt and water into the vertical section of the L-shaped conveying pipe 201 upwards. When the water passes through the connection between each return pipe 3 and the L-shaped conveying pipe 201, it will flow back to the sedimentation chamber for re-sedimentation. The silt transported to the top of the L-shaped conveying pipe 201 cannot pass through the filter screen 301 and will continue to move to the top of the L-shaped conveying pipe 201 and be discharged. The height of the top of the L-shaped conveying pipe 201 is higher than the height of the outlet connection pipe 103, which prevents water from being discharged from the top of the L-shaped conveying pipe 201. At the same time, the arc-shaped curved structure can further ensure that the water can only flow back to the overflow separation box 1 through the return pipe 3 and cannot be discharged from the top of the L-shaped conveying pipe 201, thereby achieving complete separation of water and silt.

[0045] It should be noted that the specific model and specifications of the drive motor 202 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail here.

[0046] The power supply and principle of the drive motor 202 are clear to those skilled in the art and will not be described in detail here.

[0047] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dredging device for use in the drainage of a well, characterized in that, The overflow separation tank is provided with an inlet connecting pipe on the top surface, an outlet connecting pipe on the top end of one side surface, a partition plate on the top inner wall, a gap between the bottom end of the partition plate and the bottom inner wall, a sedimentation cavity and an overflow cavity divided by the partition plate, a sand conveying assembly on the other side of the overflow separation tank, and a plurality of backflow connecting pieces between the sand conveying assembly and the one side surface of the overflow separation tank.

2. The dredging apparatus for use in downhole water disposal of claim 1, wherein: An operation opening is formed on the front side surface of the overflow separation tank, and a sealing tank door is rotatably connected to one side edge of the operation opening.

3. A dredging device for use in downhole water disposal as claimed in claim 2, characterized in that: A transparent viewing window is embedded on the surface of the sealing tank door.

4. The dredging apparatus for use in downhole water disposal of claim 1, wherein: A plurality of opposite and staggered sand blocking plates are integrally arranged on the two side inner walls of the overflow cavity, and each sand blocking plate is provided with an inclined angle towards the bottom inner wall of the overflow separation tank.

5. The dredging apparatus for use in downhole water disposal of claim 1, wherein: A plurality of opposite and staggered buffer flow guide plates are integrally arranged on the two side inner walls of the sedimentation cavity, and each buffer flow guide plate is also provided with an inclined angle towards the bottom inner wall of the overflow separation tank.

6. The dredging apparatus for use in downhole water disposal of claim 1, wherein: The bottom inner wall of the overflow separation tank is provided as a guide slope, and the height of the end close to the overflow cavity is higher than that of the end close to the sand conveying assembly.

7. The dredging apparatus for use in downhole water disposal of claim 1, wherein: The sand conveying assembly comprises an L-shaped conveying pipe, a driving motor fixedly installed on one side outer wall of the L-shaped conveying pipe, and a spiral conveying pipe integrally arranged on the outer wall of the rotating shaft.

8. A dredging device for use in downhole water disposal as claimed in claim 7, characterized in that: The vertical top end of the L-shaped conveying pipe is higher than the height of the rotating shaft.

9. The dredging apparatus for use in downhole water disposal of claim 7, wherein: The top end of the L-shaped conveying pipe is provided as an arc-shaped curved structure.

10. The dredging apparatus for use in downhole water disposal of claim 7, wherein: Each backflow connecting piece is a backflow pipe, and a plurality of backflow pipes are uniformly distributed between the L-shaped conveying pipe and the one side surface of the overflow separation tank along the vertical extension direction of the L-shaped conveying pipe. One end of each backflow pipe is in communication with the inside of the L-shaped conveying pipe, and the other end of each backflow pipe is in communication with the inside of the sedimentation cavity of the overflow separation tank. A filter screen is fixedly connected between the inner wall of the communication end of each backflow pipe and the L-shaped conveying pipe.

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