Mine old goaf accumulated water discharge system

Abstract

The invention discloses a mine old goaf accumulated water drainage system which comprises a water collector and a multi-stage centrifugal pump, one end of the water collector penetrates through an isolation coal pillar through a pipeline to be communicated with the interior of an old goaf, the other end of the water collector is communicated with the multi-stage centrifugal pump through a drainage pipeline, and the water collector comprises an outer cylinder. The interior of the outer barrel is divided into a first cavity and a second cavity through a filter plate, the first cavity is in a straight barrel closed shape, the bottom of the second cavity is of an arc-shaped structure after being provided with a notch, an arc-shaped inner barrel is arranged at the position, provided with the notch, of the second cavity, and a circular plate is fixedly connected to the end, back on to the filter plate, of the arc-shaped inner barrel. The arc-shaped inner cylinder and the circular plate are jointly and rotationally connected with the outer cylinder in the circumferential direction of the outer cylinder. The whole drainage system is relatively closed through the arranged water collector, gas accumulation near the water collector is avoided, the interior of the water collector can be fully cleaned, and the accumulated water drainage efficiency is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine groundwater discharge, and in particular to a system for discharging accumulated water in an old empty area of ​​a mine. Background Art

[0002] At present, coal mines usually drain the accumulated water in old empty areas by opening a water tank on one side of the water-isolating coal pillar, drilling through the water-isolating coal pillar with drilling equipment, draining the water in the old empty area into the water tank, and then using a multi-stage centrifugal pump to pump out the accumulated water in the water tank, thereby achieving the purpose of draining the old empty area.

[0003] However, there are many disadvantages in draining water by opening water tanks. First, the old empty area contains not only a large amount of water, but also toxic and harmful gases such as gas. These gases will also flow from the old empty area into the water tank along the water flow, which will cause gas to accumulate in the water tank area and increase the concentration, posing certain safety hazards. Second, when a power outage occurs, the centrifugal pump cannot work normally, and the accumulated water in the old empty area continuously flows into the water tank. When the water tank is full of water, it will overflow, thereby flooding the alley, and the water flowing in the alley cannot be discharged.

[0004] In view of the above-mentioned defects of the current water tank for transitional pumping and drainage, the existing technology also proposes to set a water collector between the centrifugal pump and the old empty area, that is, to replace the water tank with a closed water collector, which can not only keep the gas in a relatively closed state and discharge it with the water flow, but also prevent water from leaking into the tunnel. However, compared with the water tank, the water tank is equivalent to an open container. The silt deposited at the bottom of the water tank is easy to clean, and there will also be silt deposited at the bottom of the water collector. The presence of silt will directly affect the drainage effect. However, since the water collector is a closed container, the silt inside it is not easy to clean. For example, the patent number proposed in the prior art is 2021220711707, and the name is a water discharge system for old empty areas in mines. A water collector is also used in this system. When cleaning the inside of the water collector, a rectangular groove is opened under the water collector, and a sealing plate is installed inside the rectangular groove. The sealing plate slides in the gap between the inner cylinder and the outer cylinder to realize the opening and closing of the rectangular groove, so as to facilitate the discharge of the silt accumulated inside the water collector. However, the silt accumulated inside the water collector is usually in a lumpy state. Even if the rectangular groove is in an open state, the internal silt cannot completely and automatically slide out of the rectangular groove, and personnel are required to use tools to reach into the water collector for cleaning. In other words, the existing water collector does not have a self-cleaning function. Summary of the invention

[0005] In order to solve the technical problems existing in the above-mentioned prior art, the present invention provides a water discharge system for old empty areas of a mine.

[0006] To achieve the above object, the present invention provides the following technical solution: a water discharge system for an old empty area of ​​a mine, comprising a water collector and a multi-stage centrifugal pump, one end of the water collector is connected to the inside of the old empty area through a pipeline passing through an isolation coal pillar, and the other end is connected to the multi-stage centrifugal pump through a drainage pipeline;

[0007] The water collector includes an outer cylinder, the interior of the outer cylinder is separated by a filter plate to form a first cavity and a second cavity, the first cavity is in a straight closed shape, the second cavity is in an arc-shaped structure after a notch is opened at the bottom, and the central angle corresponding to the second cavity is greater than 180°, and an arc-shaped inner cylinder is arranged at the position where the notch is opened in the second cavity, and a circular plate is fixedly connected to the end of the arc-shaped inner cylinder facing away from the filter plate, and the arc-shaped inner cylinder and the circular plate are both connected to the outer cylinder along their circumferential rotation, a drain pipe is connected to the bottom of the first cavity, and an inlet pipe is connected to the top of the second cavity, and the accumulated water inside the old empty area enters the second cavity through the inlet pipe, and is filtered by the filter plate and enters the first cavity, and is then pumped out by a centrifugal pump through the drain pipe; when cleaning the sludge inside the second cavity, the arc-shaped inner cylinder and the circular plate are rotated 180° relative to the outer cylinder, so that the sludge attached to the arc-shaped inner cylinder slides to the outside of the outer cylinder under the action of gravity.

[0008] Preferably, the arc-shaped inner cylinder is integrally formed with a connecting ring corresponding to the water inlet end of the water inlet pipe, and the integrated structure formed by the arc-shaped inner cylinder, the circular plate and the connecting ring is rotatably connected to the inner wall of the outer cylinder, and a through hole matching the inner diameter of the water inlet pipe is opened in the middle of the connecting ring.

[0009] Preferably, one end of the arc-shaped inner cylinder facing away from the circular plate is fixedly connected to a rotating ring, the rotating ring and the circular plate have the same diameter and are adapted to the inner diameter of the outer cylinder, and several cleaning rods are evenly distributed in an annular shape on the inner side of the rotating ring, and all the cleaning rods are arranged in close contact with the filter plate.

[0010] Preferably, an outer cylinder scraper is fixedly connected to the edge between the circular plate and the rotating ring. The outer cylinder scraper is distributed along an axial direction parallel to the arc-shaped inner cylinder and is located on the same straight line as the through hole.

[0011] Preferably, a scraper frame is also arranged horizontally inside the second cavity. The scraper frame has an overall rectangular frame structure, one end of which passes through the center of the cleaning rod and is fixedly connected to the filter plate, the other end is rotatably connected to the center of the circular plate, and the middle part is rotatably connected to the inner side of the arc-shaped inner cylinder and the connecting ring.

[0012] Preferably, a rotating shaft is rotatably installed at the center of the first cavity, a cleaning plate is connected to the circumferential surface of the rotating shaft, the cleaning plate extends along the radial direction of the outer cylinder and fits with the inner wall thereof, a drain port is opened at the bottom of the first cavity at a position corresponding to the drain pipe, the width of the cleaning plate is adapted to the width of the first cavity, and the length of the drain port is smaller than the width of the first cavity;

[0013] A scraper frame is also arranged horizontally inside the second cavity. The scraper frame has a rectangular frame structure as a whole, one end of which passes through the center of the cleaning rod and the filter plate in sequence and is fixedly connected to the rotating shaft, the other end is rotatably connected to the center of the circular plate, and the middle part is rotatably connected to the arc-shaped inner cylinder and the inner side of the connecting ring.

[0014] Preferably, the cleaning plate is fixedly connected to a limiting cylinder on one side facing the rotating shaft, a telescopic rod is slidably installed inside the limiting cylinder, the telescopic rod is fixedly connected to the circumferential surface of the rotating shaft after extending to the outside of the limiting cylinder, a spring is sleeved on the outside of the telescopic rod, one end of the spring is connected to the limiting cylinder, and the other end is connected to the circumferential surface of the rotating shaft, and the spring is in a compressed state in the initial state;

[0015] Conical protrusions are respectively fixed on both sides of the drainage port along the axial direction of the outer cylinder.

[0016] Preferably, two limiting slide rails are formed on the circumferential surface of the outer cylinder corresponding to the outside of the first cavity, and a sealing ring is arranged between the two limiting slide rails and rotatably sleeved on the outside of the outer cylinder. An open groove matching the drain outlet is opened on the circumferential surface of the sealing ring, and the sealing ring and the arc-shaped inner cylinder can rotate synchronously.

[0017] Preferably, a second motor is installed at the center of an end of the outer cylinder facing away from the drain pipe. The motor shaft of the second motor passes through the outer cylinder and is fixedly connected to the center of the circular plate. A toggle rod is fixedly sleeved on the motor shaft of the second motor. The toggle rod is located in a horizontal direction in an initial state, and first extends radially along the outer cylinder, and then extends axially parallel to the outer cylinder until it is fixedly connected to the outside of the sealing ring.

[0018] Preferably, two brackets are fixed at both ends of the outer cylinder in the vertical direction, wherein the top ends of the two brackets located on one side of the second motor extend to above the toggle rod and then are connected to the outer cylinder.

[0019] Compared with the prior art, the present invention provides a system for discharging water from an old empty area of ​​a mine, which has the following beneficial effects:

[0020] (1) The present invention rotatably installs an arc-shaped inner cylinder at the bottom of the water collector. The arc-shaped inner cylinder cooperates with the outer cylinder to form a closed structure to transfer the accumulated water in the old empty area, so that the entire discharge system is relatively closed to avoid gas accumulation near the water collector. When the inside of the water collector needs to be cleaned, the arc-shaped inner cylinder rotates relative to the outer cylinder, so that the gap at the bottom of the water collector gradually opens, and the sludge attached to the arc-shaped inner cylinder slides off. The arc-shaped inner cylinder also scrapes off the sludge on the inner wall of the outer cylinder during the rotation process. After the arc-shaped inner cylinder rotates 180°, the sludge on the arc-shaped inner cylinder completely loses support and falls under the action of gravity. In addition, during the rotation of the arc-shaped inner cylinder, the scraper frame can also cooperate with the arc-shaped inner cylinder to remove the adhered sludge to ensure the sludge cleaning effect.

[0021] (2) The present invention also has a cleaning plate rotatably installed inside the first cavity. During the rotation of the cleaning plate inside the first cavity, the scraper frame is driven to rotate synchronously inside the second cavity, thereby thoroughly cleaning the sludge inside the second cavity. When the cleaning plate rotates through the conical protrusion, under the limiting effect of the conical protrusion, the cleaning plate forms a rapid reciprocating motion in the vertical direction, prompting the debris to separate from the cleaning plate under the action of inertia. In addition, the present invention can not only clean the inner walls of the two cavities, but also clean both sides of the filter plate, so that the inside of the water collector is fully cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 A schematic diagram of the entire discharge system in an embodiment of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the entire water collector in an embodiment of the present invention;

[0025] Figure 3 is a schematic structural diagram of the water collector from another angle in the embodiment;

[0026] Figure 4 Schematic diagram of the structure inside the water collector in the embodiment;

[0027] Figure 5 Schematic diagram of the internal structure of the water collector in the embodiment when it is in a cleaning state;

[0028] Figure 6 This is a schematic diagram of the distribution of the cleaning plates in the first cavity in the embodiment;

[0029] Figure 7 Schematic diagram of the connection between the scraper frame and the rotating shaft in the embodiment;

[0030] Figure 8 This is a schematic diagram of the connection between the scraper frame and the circular plate in the embodiment;

[0031] Fig. 9 This is a schematic diagram of the interior of the outer cylinder after being cut in the embodiment;

[0032] Fig.10 It is a schematic diagram of the assembly of the scraper frame and the arc-shaped inner cylinder in the embodiment;

[0033] Fig.11 This is a schematic diagram of the cleaning plate passing through the conical protrusion inside the first cavity in this embodiment.

[0034] In the figure: 1. outer cylinder; 2. water inlet pipe; 3. drain pipe; 4. bracket; 5. first motor; 6. sealing ring; 7. opening groove; 8. toggle rod; 9. second motor; 10. arc-shaped inner cylinder; 11. round plate; 12. connecting ring; 13. through hole; 14. filter plate; 15. cleaning rod; 16. scraper frame; 17. outer cylinder scraper; 18. rotating ring; 19. limiting slide rail; 20. rotating shaft; 21. cleaning plate; 22. drain outlet; 23. conical protrusion; 24. boss; 25. ring plate; 26. limiting cylinder; 27. telescopic rod; 28. spring; 29. ​​old empty area; 30. water collector; 31. multi-stage centrifugal pump; 32. isolation coal pillar. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

[0036] This embodiment proposes a system for discharging water from an old empty area of ​​a mine. Figures 1 to 11As shown, the system includes a water collector 30 and a multi-stage centrifugal pump 31. One end of the water collector 30 is connected to the inside of the old empty area 29 through a pipeline passing through the isolation coal pillar 32, and the other end is connected to the multi-stage centrifugal pump 31 through a drainage pipe. The accumulated water in the old empty area 29 flows into the water collector 30, and then the multi-stage centrifugal pump 31 works to pump out the water inside the water collector 30, thereby realizing the discharge of the accumulated water in the old empty area 29. The present invention is mainly aimed at the water collector 30 in the whole system, and the water collector 30 includes an outer cylinder 1. The interior of the outer cylinder 1 is divided into a first cavity and a second cavity by a filter plate 14. The first cavity is in a straight closed shape, and the second cavity has an arc-shaped structure after a notch is opened at the bottom, and the central angle corresponding to the second cavity is greater than 180°, and an arc-shaped inner cylinder is arranged at the position where the notch is opened in the second cavity. The arc-shaped inner cylinder 10 is slidably nested in the outer cylinder 1, and the end of the arc-shaped inner cylinder 10 facing away from the filter plate 14 is fixedly connected with the circular plate 11. The arc-shaped inner cylinder 10 and the circular plate 11 are both connected to the outer cylinder 1 along its circumferential rotation. Since the central angle of the second cavity is greater than 180°, it can ensure that the arc-shaped inner cylinder 10 is always inside the outer cylinder 1. The bottom of the first cavity is connected with a drain pipe 3, and the drain pipe 3 is connected with the multi-stage centrifugal pump 31 through a drainage pipe. The top of the second cavity is connected with a water inlet pipe 2, and the water inlet pipe 2 is connected with the old empty area 29 through a pipeline. The accumulated water in the old empty area 29 enters the second cavity through the water inlet pipe 2, and then the accumulated water filtered by the filter plate 14 enters the first cavity. Finally, the filtered accumulated water is pumped out by the centrifugal pump through the drain pipe 3.

[0037] The accumulated water in the old empty area 29 will bring in a lot of debris in the process of entering the second cavity. After the water collector 30 has been working for a long time, sludge will be deposited inside it. If the sludge inside the water collector 30 is not cleaned in time, the sludge will affect the flow of the accumulated water, and then affect the discharge efficiency. Therefore, it is necessary to clean the inside of the water collector 30 regularly. When cleaning the sludge inside the second cavity (the sludge is mainly attached to the arc-shaped inner cylinder 10), the arc-shaped inner cylinder 10 and the circular plate 11 are rotated 180° relative to the outer cylinder 1, so that the arc-shaped inner cylinder 10 is rotated from Figure 4 Rotate the position shown to Figure 5 In the position shown, the silt attached to the arc-shaped inner cylinder 10 loses its supporting force and slides to the outside of the outer cylinder 1 under the action of gravity.

[0038] Since the water inlet pipe 2 is connected to the old empty area 29, when cleaning the inside of the water collector 30, it is necessary to cut off the connection between the old empty area 29 and the inside of the water collector 30, otherwise when the arc-shaped inner cylinder 10 rotates to Figure 5position, the accumulated water inside the old empty area 29 will overflow to the outside of the water collector 30. Based on the above needs, in this embodiment, the water inlet end of the water inlet pipe 2 corresponding to the arc-shaped inner cylinder 10 is integrally formed with a connecting ring 12. The integrated structure formed by the arc-shaped inner cylinder 10, the circular plate 11 and the connecting ring 12 is rotatably connected to the inner wall of the outer cylinder 1. A through hole 13 matched with the inner diameter of the water inlet pipe 2 is opened in the middle of the connecting ring 12. The arc-shaped inner cylinder 10 cooperates with the outer cylinder 1 to form a closed structure in the initial position. At this time, the through hole 13 is connected with the water inlet pipe 2. When the arc-shaped inner cylinder 10 rotates relative to the outer cylinder 1, the through hole 13 is misaligned with the water inlet pipe 2, thereby cutting off the connection between the old empty area 29 and the inside of the water collector 30.

[0039] A second motor 9 is installed at the outer center of one end of the outer cylinder 1 adjacent to the circular plate 11. The motor shaft of the second motor 9 passes through the outer cylinder 1 and is fixedly connected to the center of the circular plate 11. The circular plate 11 and the arc-shaped inner cylinder 10 are driven to rotate synchronously by the second motor 9. If the height of the sludge accumulation inside the second cavity exceeds the position of the arc-shaped inner cylinder 10, the arc-shaped inner cylinder 10 can also scrape off the sludge attached to the inner wall of the outer cylinder 1 during the rotation process. At the same time, a rotating ring 18 is fixedly connected to the end of the arc-shaped inner cylinder 10 facing away from the circular plate 11. The rotating ring 18 and the circular plate 1 1 has the same diameter and is adapted to the inner diameter of the outer cylinder 1. Two cleaning rods 15 are evenly distributed in an annular manner on the inner side of the rotating ring 18 and are distributed in a cross pattern. The two cleaning rods 15 are both arranged in close contact with the filter plate 14. During the synchronous rotation of the rotating ring 18 and the arc-shaped inner cylinder 10, the two cleaning rods 15 can clean the sludge from the filter plate 14 to prevent the sludge from clogging the filter plate 14. Moreover, since the maximum rotation angle of the arc-shaped inner cylinder 10 and the rotating ring 18 is 180°, the rotation tracks of the two cleaning rods 15 can cover the entire filter plate 14, so that the surface of the filter plate 14 can be cleaned.

[0040] In addition, since the maximum rotation angle of the arc-shaped inner cylinder 10 and the rotating ring 18 is 180°, the arc-shaped inner cylinder 10 can scrape the inner wall of one side of the outer cylinder 1 during the entire rotation process, but the other side cannot be cleaned. Therefore, in this embodiment, an outer cylinder scraper 17 is fixedly connected to the edge between the circular plate 11 and the rotating ring 18. The outer cylinder scraper 17 is distributed along the axial direction parallel to the arc-shaped inner cylinder 10 and is located on the same straight line with the through hole 13, so as to attach Figure 3 For example, when the arc-shaped inner cylinder 10 rotates 180° counterclockwise, the arc-shaped inner cylinder 10 scrapes one side of the inner wall of the outer cylinder 1, and the outer cylinder scraper 17 can scrape the sludge on the other side of the inner wall of the outer cylinder 1.

[0041] In the above scheme, when the arc-shaped inner cylinder 10 rotates counterclockwise, one side of the arc-shaped inner cylinder 10 gradually forms an opening with the outer cylinder 1. As the rotation angle of the arc-shaped inner cylinder 10 increases, the sludge on the arc-shaped inner cylinder 10 will slide out from the opening. When the arc-shaped inner cylinder 10 rotates 180°, the sludge falls to the outside of the outer cylinder 1 under the action of gravity, and there is no need for personnel to shovel it. However, in actual operation, if the sludge is severely agglomerated, it will adhere tightly to the arc-shaped inner cylinder 10. Even if the arc-shaped inner cylinder 10 rotates 180°, the sludge cannot be discharged by gravity. Therefore, as a preferred embodiment, this embodiment is also provided with a horizontal direction inside the second cavity. A scraper frame 16 is provided, and the scraper frame 16 has a rectangular frame structure as a whole. One end of the scraper frame 16 passes through the center of the cleaning rod 15 and is fixedly connected to the filter plate 14 (the cleaning rod 15 is rotatably connected to the filter plate 14), and the other end is fixedly connected to a ring plate 25. A boss 24 is formed at the center of the circular plate 11, and the ring plate 25 is rotatably nested outside the boss 24. The middle part of the scraper frame 16 is rotatably connected to the inner side of the arc-shaped inner cylinder 10 and the connecting ring 12. During the rotation of the arc-shaped inner cylinder 10, the scraper frame 16 that remains fixed can scrape the inner wall of the arc-shaped inner cylinder 10, so that the sludge is first separated from the inner wall of the arc-shaped inner cylinder 10, and then it slides or falls down under the action of gravity. At the same time, due to the existence of the scraper frame 16, it can also cooperate with the cleaning rod 15. After the cleaning rod 15 scrapes off the sludge on the filter plate 14, if some sludge is still attached to the cleaning rod 15, the scraper frame 16 and the cleaning rod 15 can rotate relative to each other, and the sludge remaining on the outside of the cleaning rod 15 can also be scraped off, which can play the effect of cleaning the cleaning rod 15 to a certain extent.

[0042] During the operation of the water collector 30, although the filter plate 14 can filter the accumulated water in the second cavity, small granular debris will still enter the first cavity. These fine debris will accumulate in the first cavity for a long time and may block the drain pipe 3. Therefore, it is necessary to clean the inside of the first cavity. Therefore, in this embodiment, a rotating shaft 20 is rotatably installed at the center of the first cavity. A cleaning plate 21 is connected to the circumferential surface of the rotating shaft 20. The cleaning plate 21 extends along the radial direction of the outer cylinder 1 and fits with its inner wall. A drain port 22 is opened at the bottom of the first cavity at a position corresponding to the drain pipe 3. The width of the cleaning plate 21 is adapted to the width of the first cavity, and the length of the drain port 22 is less than the width of the first cavity. A first motor 5 is installed on the outside of one end of the outer cylinder 1 adjacent to the filter plate 14. The motor shaft of the first motor 5 passes through the interior of the outer cylinder 1 and is fixedly connected to the rotating shaft 20. The cleaning plate 21 is driven by the first motor 5 to rotate in the first cavity, thereby cleaning the inside of the first cavity, and the scraped debris is discharged from the first cavity from the drain port 22.

[0043] At the same time, if the scraper frame 16 remains fixed, it can cooperate with the inner wall of the outer cylinder 1 to form the effect of scraping off the sludge. However, since the scraper frame 16 only contacts the inner wall of the outer cylinder 1 once to scrape off the sludge, the sludge removal effect cannot be guaranteed. Therefore, the present embodiment also optimizes the action of the scraper frame 16. One end of the scraper frame 16 passes through the center of the cleaning rod 15 and the filter plate 14 in sequence and is fixedly connected to the rotating shaft 20, which is equivalent to the scraper frame 16 having two working modes. The first is to remain fixed, and the other is to rotate under the action of the first motor 5, so that the scraper frame 16 is fully in contact with the arc-shaped inner cylinder 10.

[0044] Furthermore, when the cleaning plate 21 cleans the inner wall of the first cavity and the filter plate 14, some debris will also adhere to the cleaning plate 21 and cannot be discharged from the drain port 22. In order to promote the discharge of debris, the present embodiment selects a limiting cylinder 26 fixedly connected to the side of the cleaning plate 21 facing the rotating shaft 20, and a telescopic rod 27 is slidably installed inside the limiting cylinder 26. The telescopic rod 27 is fixedly connected to the circumferential surface of the rotating shaft 20 after extending to the outside of the limiting cylinder 26. A spring 28 is also sleeved on the outside of the telescopic rod 27. One end of the spring 28 is connected to the limiting cylinder 26, and the other end is connected to the circumferential surface of the rotating shaft 20. The spring 28 is in a compressed state in its initial state, and the cleaning plate 21 is pressed against the outer cylinder under the action of the spring 28. On the inner wall of the body 1, as the rotating shaft 20 rotates, the cleaning plate 21 scrapes off the debris on the inner wall of the first cavity, and the drain port 22 is fixed with conical protrusions 23 on both sides of the axial direction of the outer cylinder body 1. When the cleaning plate 21 passes through the conical protrusion 23, under the limiting action of the conical protrusion 23, the cleaning plate 21 will move upward, and the telescopic rod 27 will extend into the inside of the limiting cylinder 26, and the spring 28 will be further compressed. When the cleaning plate 21 is separated from the conical protrusion 23, the cleaning plate 21 starts to reset under the action of the spring 28, which is equivalent to the cleaning plate 21 reciprocating in the vertical direction when passing through the drain port 22 (equivalent to the cleaning plate 21 generating vibration), and the debris attached to the cleaning plate 21 will be separated under the action of inertia.

[0045] When the water collector 30 is working normally, the drain port 22 at the bottom of the first cavity should be in a blocked state. Therefore, two limiting slide rails 19 are formed on the circumferential surface of the outer cylinder 1 corresponding to the outside of the first cavity. A blocking ring 6 is arranged between the two limiting slide rails 19 and is rotatably sleeved on the outside of the outer cylinder 1. An opening groove 7 matching the drain port 22 is provided on the circumferential surface of the blocking ring 6, and the blocking ring 6 and the arc-shaped inner cylinder 10 can rotate synchronously. In the initial state, the opening groove 7 is located as shown in FIG. Figure 1 In the position shown, when the arc-shaped inner cylinder 10 rotates 180°, the opening groove 7 rotates to coincide with the drain port 22. When the interiors of the first cavity and the second cavity are cleaned, the drain port 22 at the bottom of the first cavity can be blocked again after the arc-shaped inner cylinder 10 is reset.

[0046] In the above scheme, the structure design of the arc inner cylinder 10 and the blocking ring 6 rotating synchronously is as follows: a second motor 9 is installed at the center of one end of the outer cylinder 1 away from the drain pipe 3, and the motor shaft of the second motor 9 passes through the outer cylinder 1 and is fixedly connected to the center of the circular plate 11. A toggle rod 8 is fixedly sleeved on the motor shaft of the second motor 9. The toggle rod 8 is located in the horizontal direction in the initial state, and it first extends along the radial direction of the outer cylinder 1, and then extends along the axial direction parallel to the outer cylinder 1 to be fixedly connected to the outside of the blocking ring 6. When the second motor 9 drives the circular plate 11 to rotate, it can also drive the toggle rod 8 to rotate, and the toggle rod 8 drives the blocking ring 6 to rotate synchronously with the arc inner cylinder 10 outside the outer cylinder 1. Two brackets 4 are fixed at both ends of the outer cylinder 1 in the vertical direction. Since the toggle rod 8 rotates around the outside of the outer cylinder 1, in order to avoid interference with the rotation of the toggle rod 8, the top ends of the two brackets 4 on one side of the second motor 9 extend to the top of the toggle rod 8 and are connected to the outer cylinder 1.

[0047] It should be noted that the curvature of the arc-shaped inner cylinder 10 is slightly larger than the curvature of the notch of the outer cylinder 1. When cleaning the inside of the water collector 30, the second motor 9 is first used to drive the circular plate 11 to rotate a smaller angle. The angle of rotation of the circular plate 11 can not only completely misalign the water inlet pipe 2 and the through hole 13, but also ensure that the arc-shaped inner cylinder 10 and the outer cylinder 1 are still in a closed state. The multi-stage centrifugal pump 31 first drains the accumulated water inside the water collector 30 to avoid the water stored in the water collector 30 from flowing out when cleaning the sludge. After the accumulated water inside the water collector 30 is pumped out, the multi-stage centrifugal pump 31 stops working. In order to prevent the water inside the drainage pipe between the multi-stage centrifugal pump 31 and the drain pipe 3 from flowing back into the water collector 30, a one-way valve can also be set inside the drain pipe 3.

[0048] In the description of the present invention, the terms "first", "second", "another", and "yet another" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0050] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A water drainage system for old empty areas of a mine, characterized by: It comprises a water collector (30) and a multi-stage centrifugal pump (31), one end of the water collector (30) is connected to the inside of the old empty area (29) through a pipeline passing through the isolation coal pillar (32), and the other end is connected to the multi-stage centrifugal pump (31) through a drainage pipeline; The water collector (30) comprises an outer cylinder (1), the interior of the outer cylinder (1) is divided into a first cavity and a second cavity by a filter plate (14), the first cavity is in a straight closed shape, a notch is provided at the bottom of the second cavity to form an arc-shaped structure, and the central angle of the circle corresponding to the second cavity is greater than 180°, an arc-shaped inner cylinder (10) is provided at the position where the notch is provided in the second cavity, and a circular plate (11) is fixedly connected to one end of the arc-shaped inner cylinder (10) facing away from the filter plate (14), and the arc-shaped inner cylinder (10) and the circular plate (11) are both connected to the outer cylinder (1) along their circumference. The first cavity is connected to the outer cavity by rotation, the bottom of the first cavity is connected to a drainage pipe (3), and the top of the second cavity is connected to a water inlet pipe (2). The accumulated water in the old empty area enters the second cavity through the water inlet pipe (2) and is filtered by the filter plate (14) into the first cavity, and then is pumped out by the centrifugal pump through the drainage pipe (3). When cleaning the sludge in the second cavity, the arc-shaped inner cylinder (10) and the circular plate (11) are rotated 180 degrees relative to the outer cylinder (1), so that the sludge attached to the arc-shaped inner cylinder (10) slides to the outside of the outer cylinder (1) under the action of gravity.

2. A mine old empty area water drainage system according to claim 1, characterized in that: The arc-shaped inner cylinder (10) is integrally formed with a connecting ring (12) corresponding to the water inlet end of the water inlet pipe (2); the integrated structure formed by the arc-shaped inner cylinder (10), the circular plate (11) and the connecting ring (12) is rotatably connected to the inner wall of the outer cylinder (1); and a through hole (13) matching the inner diameter of the water inlet pipe (2) is provided in the middle of the connecting ring (12).

3. A mine old empty area water drainage system according to claim 2, characterized in that: A rotating ring (18) is fixedly connected to one end of the arc-shaped inner cylinder (10) facing away from the circular plate (11). The rotating ring (18) has the same diameter as the circular plate (11) and is adapted to the inner diameter of the outer cylinder (1). A plurality of cleaning rods (15) are evenly distributed in an annular shape on the inner side of the rotating ring (18). All the cleaning rods (15) are arranged in close contact with the filter plate (14).

4. A mine old empty area water drainage system according to claim 3, characterized in that: An outer cylinder scraper (17) is also fixedly connected to the edge between the circular plate (11) and the rotating ring (18). The outer cylinder scraper (17) is distributed along an axial direction parallel to the arc-shaped inner cylinder (10) and is located on the same straight line as the through hole (13).

5. A mine old empty area water drainage system according to any one of claims 2 to 4, characterized in that: A scraper frame (16) is also arranged in the horizontal direction inside the second cavity. The scraper frame (16) is a rectangular frame structure as a whole. One end of the scraper frame passes through the center of the cleaning rod (15) and is fixedly connected to the filter plate (14). The other end is rotatably connected to the center of the circular plate (11). The middle part is rotatably connected to the inner side of the arc-shaped inner cylinder (10) and the connecting ring (12).

6. A mine old empty area water drainage system according to any one of claims 2 to 4, characterized in that: A rotating shaft (20) is rotatably mounted at the center of the first cavity, a cleaning plate (21) is connected to the circumferential surface of the rotating shaft (20), the cleaning plate (21) extends radially along the outer cylinder (1) and fits the inner wall thereof, a drainage port (22) is provided at the bottom of the first cavity at a position corresponding to the drainage pipe (3), the width of the cleaning plate (21) is adapted to the width of the first cavity, and the length of the drainage port (22) is smaller than the width of the first cavity; A scraper frame (16) is also arranged in the horizontal direction inside the second cavity. The scraper frame (16) is a rectangular frame structure as a whole. One end of the scraper frame passes through the center of the cleaning rod (15) and the filter plate (14) in sequence and is fixedly connected to the rotating shaft (20). The other end is rotatably connected to the center of the circular plate (11). The middle part is rotatably connected to the inner side of the arc-shaped inner cylinder (10) and the connecting ring (12).

7. A mine old empty area water drainage system according to claim 6, characterized in that: A cleaning plate (21) is fixedly connected to a limiting cylinder (26) on one side facing the rotating shaft (20), a telescopic rod (27) is slidably mounted inside the limiting cylinder (26), the telescopic rod (27) is fixedly connected to the circumferential surface of the rotating shaft (20) after extending to the outside of the limiting cylinder (26), a spring (28) is sleeved on the outside of the telescopic rod (27), one end of the spring (28) is connected to the limiting cylinder (26), and the other end is connected to the circumferential surface of the rotating shaft (20), and the spring (28) is in a compressed state in an initial state; Conical protrusions (23) are respectively fixed on both sides of the water discharge port (22) along the axial direction of the outer cylinder (1).

8. A mine old empty area water drainage system according to claim 7, characterized in that: Two limiting slide rails (19) are formed on the circumferential surface of the outer cylinder (1) corresponding to the outside of the first cavity, and a blocking ring (6) is arranged between the two limiting slide rails (19) and is rotatably sleeved on the outside of the outer cylinder (1). An opening groove (7) matching the drainage port (22) is provided on the circumferential surface of the blocking ring (6), and the blocking ring (6) and the arc-shaped inner cylinder (10) can rotate synchronously.

9. A mine old empty area water drainage system according to claim 8, characterized in that: A second motor (9) is installed at the center of one end of the outer cylinder (1) away from the drain pipe (3). The motor shaft of the second motor (9) passes through the outer cylinder (1) and is fixedly connected to the center of the circular plate (11). A toggle rod (8) is fixedly sleeved on the motor shaft of the second motor (9). The toggle rod (8) is located in a horizontal direction in an initial state and first extends in the radial direction of the outer cylinder (1), and then extends in an axial direction parallel to the outer cylinder (1) to be fixedly connected to the outside of the blocking ring (6).

10. A mine old empty area water drainage system according to claim 9, characterized in that: Two brackets (4) are fixed in the vertical direction at both ends of the outer cylinder (1), wherein the top ends of the two brackets (4) located on one side of the second motor (9) extend to the top of the toggle rod (8) and are connected to the outer cylinder (1).

Images