Efficient pipe washing system for mine filling

Abstract

The application discloses a mine filling efficient pipe washing system, which comprises a pumping device and a filling pipeline shared with a mine filling system, and further comprises a wind-water mixing bin connected with branch pipelines of a surface pipeline section of the filling pipeline, a high-pressure water bin connected with the wind-water mixing bin and provided with a valve between the wind-water mixing bin and the high-pressure water bin, an air compressor connected with the wind-water mixing bin, and a one-way exhaust valve. The mine filling efficient pipe washing system can provide multiple pipe washing modes, such as clean water pipe washing, wind-water two-phase forward pipe washing, wind-water-cleaning ball three-phase forward pipe washing and wind-water-cleaning ball three-phase bidirectional pipe washing. The pipe washing modes are flexible and can be combined at will. In actual use, the mine can flexibly select and determine the pipe washing mode according to the actual situation of the filling system pipeline.

Description

Technical Field

[0001] This invention relates to the field of mining equipment technology, and in particular to a high-efficiency pipe washing system for mine backfilling. Background Technology

[0002] Backfilling mining is the preferred mining method in my country's underground mines. It has the advantages of good safety conditions and the ability to handle large quantities of mine solid waste. Backfilling mining requires mining companies to build a backfilling system to fill the underground goaf with slurry. After the backfilling system fills the goaf, there are often slurry residues and solidified substances attached to the backfilling pipes, which need to be cleaned.

[0003] Currently, most existing pipe washing methods use clean water to flush the filling pipes. This process is time-consuming and wastes a lot of water resources. Moreover, it cannot completely clean stubborn solids in some filling pipes. Even with high-pressure air and water washing, some stubborn solids may still adhere to the pipe walls, making it difficult to clean the filling pipes thoroughly. This can lead to blockages in the filling pipes during subsequent filling, affecting the normal operation of the mine filling system and the safe production of the mine. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-efficiency pipe washing system for mine backfilling. This system includes pumping equipment and backfilling pipelines shared with the mine backfilling system, and further comprises: a ventilation-water mixing chamber connected to a branch pipe of the surface section of the backfilling pipeline, with valves installed between the ventilation-water mixing chamber and the backfilling pipeline; a high-pressure water chamber connected to the ventilation-water mixing chamber, with valves installed between the high-pressure water chamber and the ventilation-water mixing chamber; an air compressor connected to the ventilation-water mixing chamber; and a one-way exhaust valve connected to a branch short pipe at the horizontal section of the backfilling pipeline before it enters the mine, with valves installed on the branch short pipe.

[0005] As a further description of the above technical solution: a valve is provided on the connecting pipe between the filling pipeline and the pumping equipment, a branch pipe of the filling pipeline near the pumping equipment is connected to a piston air compressor, and a valve is provided on the connecting pipe between the piston air compressor and the filling pipeline.

[0006] As a further description of the above technical solution: an integrated cleaning ball chamber is connected to the branch pipe of the feng shui mixing chamber, and a three-way valve is installed on the branch pipe between the integrated cleaning ball chamber and the feng shui mixing chamber. The cleaning ball chamber stores cleaning balls and piston balls.

[0007] As a further description of the above technical solution: a one-way air inlet valve is installed at the end of the filling pipe.

[0008] As a further description of the above technical solution: the three-way valve is connected to the filling pipeline through a branch pipe, and a discharge valve is provided at the lower part of the branch pipe. The discharge valve is located upstream of the interface between the air-water mixing chamber and the filling pipeline.

[0009] As a further description of the above technical solution: the bottom of the integrated cleaning ball chamber is provided with a discharge channel, which is used to release and collect cleaning balls and piston balls into the pipeline. Above the discharge channel is a plate chamber, which is divided into multiple partitioned plate chambers by partitions. The partitioned plate chambers are used to store cleaning balls and piston balls of different diameters respectively. The discharge between each partitioned plate chamber and the bottom discharge channel is controlled by a gate.

[0010] As a further description of the above technical solution: the cleaning ball is a hollow steel ball with a concave surface.

[0011] As a further description of the above technical solution: the piston ball is a sphere with the outermost layer being rubber.

[0012] As a further description of the above technical solution: the end of the filling pipe is connected to a collection bag.

[0013] The above technical solution has the following advantages or beneficial effects:

[0014] 1. The efficient pipe washing system for mine filling provided by this invention can provide various pipe washing methods, such as clean water pipe washing, air and water two-phase forward pipe washing, air, water and cleaning ball three-phase forward pipe washing, and air, water and cleaning ball three-phase bidirectional pipe washing. The pipe washing methods are flexible and diverse and can be combined arbitrarily. In actual use, the mine can flexibly select and determine the pipe washing method according to the actual situation of the filling system pipeline.

[0015] 2. In addition to using conventional clean water to flush the pipes and the currently more efficient high-pressure air-water flushing method, this invention also designs a more efficient three-phase unidirectional and bidirectional pipe flushing method using air, water, and a ball. The surface of the cleaning ball has a concave surface, which can powerfully impact stubborn deposits on the pipe wall. Moreover, the impact is bidirectional, both forward and reverse, so the pipe flushing is more water-saving and efficient. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the configuration of a high-efficiency pipe washing system for mine backfilling according to an embodiment of the present invention;

[0017] Figure 2 This is a front view of the integrated cleaning spherical chamber of the high-efficiency pipe washing system for mine filling according to an embodiment of the present invention.

[0018] Figure 3 This is a side view of the integrated cleaning spherical chamber of the high-efficiency pipe washing system for mine filling according to an embodiment of the present invention.

[0019] Figure 4 This is a top view of the integrated cleaning spherical chamber of the high-efficiency pipe washing system for mine filling according to an embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the cleaning ball in the high-efficiency pipe washing system for mine filling according to an embodiment of the present invention;

[0021] Figure 6 This is a schematic diagram of the piston ball of the high-efficiency pipe washing system for mine filling according to an embodiment of the present invention.

[0022] Legend:

[0023] 1. Pumping equipment; 2. Piston air compressor; 3. Integrated cleaning ball silo; 4. High-pressure water silo; 5. Air compressor; 6. Air-water mixing silo; 7. Filling pipeline; 8. One-way exhaust valve; 9. One-way intake valve; 10. Valve; 11. Three-way valve; 12. Discharge valve; 13. Collection bag; 14. Cleaning ball; 15. Piston ball; 31. Separating plate silo; 32. Discharge channel; 33. Gate; 141. Concave surface. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] In the description of this invention, it should be noted that the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0026] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] Please see Figure 1-6This invention provides a technical solution: a high-efficiency pipe washing system for mine backfilling, comprising a pumping device 1 and a backfilling pipe 7 shared with the mine backfilling system, and further comprising: a water-air mixing chamber 6, which is connected to a branch pipe of the surface section of the backfilling pipe 7, and a valve 10 is provided between the water-air mixing chamber 6 and the backfilling pipe 7; a high-pressure water chamber 4, which is connected to the water-air mixing chamber 6, and a valve 10 is provided between the high-pressure water chamber 4 and the water-air mixing chamber 6; an air compressor 5, which is connected to the water-air mixing chamber 6; a one-way exhaust valve 8, which is connected to a branch short pipe at the horizontal section of the backfilling pipe 7 before it enters the mine, and a valve 10 is installed on the branch short pipe; and a one-way air inlet valve 9 is installed at the end of the backfilling pipe 7.

[0028] In this embodiment, valve 10 near pumping equipment 1 is closed, valve 10 at the end of filling pipe 7 is opened, valve 10 on the branch pipe between high-pressure water tank 4 and air-water mixing tank 6 is opened, valve 10 on the branch pipe between air-water mixing tank 6 and filling pipe 7 is opened, and valve 10 on the branch pipe of one-way vent valve 8 is closed. Then, high-pressure water tank 4 supplies water to air-water mixing tank 6 separately, achieving flushing of filling pipe 7 with water flow.

[0029] Specifically, valve 10 near pumping equipment 1 is closed, and valve 10 at the end of filling pipe 7 is opened; valve 10 on the branch pipe between high-pressure water chamber 4 and air-water mixing chamber 6 is opened, and valve 10 on the branch pipe between air-water mixing chamber 6 and filling pipe 7 is also opened, while valve 10 on the branch pipe of one-way exhaust valve 8 is closed. Then, water and high-pressure gas are simultaneously supplied to air-water mixing chamber 6 from high-pressure water chamber 4 and air compressor 5, achieving flushing of filling pipe 7 using a high-pressure air-water mixed flow.

[0030] like Figure 1 As shown, a valve 10 is installed on the connecting pipe between the filling pipe 7 and the pumping equipment 1. A branch pipe of the filling pipe 7 near the pumping equipment 1 is connected to a piston air compressor 2. A valve 10 is installed on the connecting pipe between the piston air compressor 2 and the filling pipe 7.

[0031] like Figure 1 As shown, an integrated cleaning ball chamber 3 is connected to a branch pipe of the air-water mixing chamber 6. A three-way valve 11 is installed on the branch pipe between the integrated cleaning ball chamber 3 and the air-water mixing chamber 6. The cleaning ball chamber 3 stores cleaning balls 14 and piston balls 15. The three-way valve 11 is connected to the filling pipe 7 through a branch pipe. A discharge valve 12 is installed at the lower part of the branch pipe. The discharge valve 12 is located upstream of the interface between the air-water mixing chamber 6 and the filling pipe 7. After the pipe is cleaned, the discharge valve 12 is opened, and the piston ball 15 is pushed and pulled to the discharge valve 12 port by the piston air compressor 2 to discharge it.

[0032] In this embodiment, the valve 10 near the pumping device 1 is closed, and the valve 10 at the end of the filling pipe 7 is opened; the branch pipe valve 10 between the high-pressure water chamber 4 and the air-water mixing chamber 6 is opened, and the valve 10 of the branch pipe between the air-water mixing chamber 6 and the filling pipe 7 is also opened, while the valve 10 on the branch pipe of the one-way exhaust valve 8 is closed. The three-way valve 11 under the integrated cleaning ball chamber 3 is adjusted so that the cleaning ball 14 discharges into the air-water mixing chamber 6, and the gate 33 in the integrated cleaning ball chamber 3 is opened. Then, pressurized air, water, and cleaning ball 14 three-phase mixture are simultaneously supplied to the air-water mixing chamber 6 by the air compressor 5, the high-pressure water chamber 4, and the integrated cleaning ball chamber 3, forming a three-phase mixed forward washing pipe of air, water, and cleaning ball 14.

[0033] like Figure 2 , Figure 3 and Figure 4 As shown, the integrated cleaning ball chamber 3 adopts a special design. It is a square silo with a multi-directionally sloping bottom. At the bottom, there is a discharge channel 32, parallel to the bottom of the integrated cleaning ball chamber 3, used to release and collect the cleaning balls 14 and piston balls 15 into the pipeline. Above the discharge channel 32 is a plate-type silo, internally divided into multiple partitioned silos 31 by partitions to store cleaning balls 14 and piston balls 15 of different diameters. The discharge between each partitioned silo 31 and the bottom discharge channel 32 is controlled by a gate 33.

[0034] The integrated cleaning ball chamber 3 of the pipe washing system contains cleaning balls 14 of different diameters in its partitioned compartments 31. Each cleaning ball 14 is a hollow steel ball with a concave surface 141. The apparent density of the hollow steel ball is comparable to that of water. One partitioned compartment 31 in the integrated cleaning ball chamber 3 holds a piston ball 15. The piston ball 15 is required to be a sphere with an outermost layer of rubber and an overall density slightly heavier than water.

[0035] In this embodiment, by closing valve 10 near pumping equipment 1, opening valve 10 on the branch pipe between piston air compressor 2 and filling pipe 7, opening valve 10 on the branch pipe connected to one-way exhaust valve 8, and closing valve 10 at the end of filling pipe 7, the three-way valve 11 under integrated cleaning ball chamber 3 is first adjusted to allow one piston ball 15 to exit from the separator hopper 31 and enter filling pipe 7. Then, valves 10 and 11 are controlled to supply high-pressure water and cleaning ball 14 mixture from high-pressure water chamber 4 and integrated cleaning ball chamber 3 through air-water mixing chamber 6 into filling pipe 7. After the mixture fills the entire filling pipe 7 downstream of piston ball 15, valve 10 on the branch pipe connecting air-water mixing chamber 6 and filling pipe 7 is closed. First, the piston air compressor 2 pulls the piston in the reverse direction, creating negative pressure in the filling pipe 7. This pulls the piston ball 15 to enter through the one-way air inlet valve 9 at the end of the filling pipe 7. Because the gas is less dense than water, it moves upward in the filling pipe 7 to the horizontal section at the ground surface. Then, the piston air compressor 2 pushes the piston ball 15 in the forward direction to expel air from the filling pipe 7. When water begins to flow from the one-way exhaust valve 8, the piston air compressor 2 pulls the piston ball 15 in the reverse direction again. After repeating this cycle several times, the valve 10 at the end of the filling pipe 7 is opened to release the mixture in the filling pipe 7. The piston air compressor 2 drives the piston ball 15 to move in both directions. Air is continuously introduced into the water and cleaning ball 14 mixture in the filling pipe 7 and exhausted from the ground surface. The gas drives the water and cleaning ball 14 mixture to move in both directions, repeatedly impacting the stubborn deposits on the filling pipe 7 in both directions. The surface of the cleaning ball 14 has a concave surface 141, which can powerfully impact the stubborn deposits on the filling pipe wall. Moreover, the impact is bidirectional, both forward and reverse, so the pipe cleaning is more water-saving and efficient.

[0036] Specifically, current methods for cleaning filling pipelines in downfilling mine filling systems are limited, consume large amounts of water, and are ineffective at quickly and efficiently removing stubborn deposits adhering to the pipeline walls, easily leading to blockages during refilling. By designing and combining various devices, flexible pipeline cleaning after filling is achieved. This allows for single-phase or multi-phase mixed cleaning using water, water vapor, and water balloons, and enables both forward and bidirectional water balloon cleaning. This not only more effectively removes stubborn deposits from the pipeline walls but also offers greater flexibility and water conservation, making it a flexible, efficient, and economical pipeline cleaning system.

[0037] like Figure 1 As shown, the end of the filling pipe 7 is connected to the collection bag 13; the cleaning ball 14 can be recovered during and after the pipe washing system. Before the cleaning ball 14 exits the filling pipe 7 during or after pipe washing, it can be recovered through the collection bag 13 at the end of the filling pipe 7.

[0038] Among them, the Fengshui mixing chamber 6 is a vertical sealed chamber with a capacity of about 5-10m3. The branch pipe of the Fengshui mixing chamber 6 connected to the filling pipe 7 is controlled by a valve 10.

[0039] Specifically, such as Figure 1-6 As shown, this pipe washing system can achieve multiphase mixing and bidirectional pipe washing during pipe washing after filling, specifically with the following pipe washing methods:

[0040] The first flushing method: forward flushing with clean water. In this case, close valve 10 near pumping equipment 1 and open valve 10 at the end of filling pipe 7; open valve 10 on the branch pipe between high-pressure water chamber 4 and air-water mixing chamber 6, and simultaneously open valve 10 on the branch pipe between air-water mixing chamber 6 and filling pipe 7; at the same time, close valve 10 on the branch pipe of one-way vent valve 8. Then, high-pressure water chamber 4 supplies water solely to air-water mixing chamber 6, using the water flow to flush filling pipe 7.

[0041] The second flushing method: forward flushing with a two-phase air-water mixture. In this method, valve 10 near pumping equipment 1 is closed, and valve 10 at the end of filling pipe 7 is opened. The branch pipe valve 10 between high-pressure water chamber 4 and air-water mixing chamber 6 is opened, as is the branch pipe valve 10 between air-water mixing chamber 6 and filling pipe 7. Simultaneously, valve 10 on the branch pipe of one-way exhaust valve 8 is closed. Then, water and high-pressure gas are simultaneously supplied to air-water mixing chamber 6 from high-pressure water chamber 4 and air compressor 5, using the high-pressure air-water mixed flow to flush filling pipe 7.

[0042] The third pipe cleaning method: three-phase mixing forward pipe cleaning of air, water, and cleaning balls 14. In this case, close valve 10 near pumping equipment 1 and open valve 10 at the end of filling pipe 7; open valve 10 on the branch pipe between high-pressure water chamber 4 and air-water mixing chamber 6, and simultaneously open valve 10 on the branch pipe between air-water mixing chamber 6 and filling pipe 7, while closing valve 10 on the branch pipe of one-way exhaust valve 8. Adjust the three-way valve 11 under integrated cleaning ball chamber 3 to allow cleaning balls 14 to discharge into air-water mixing chamber 6, and simultaneously open gate 33 in integrated cleaning ball chamber 3. Then, pressurized air, water, and cleaning balls 14 three-phase mixture are simultaneously supplied to air-water mixing chamber 6 by air compressor 5, high-pressure water chamber 4, and integrated cleaning ball chamber 3, forming a three-phase mixing forward pipe cleaning of air, water, and cleaning balls 14.

[0043] The fourth pipe cleaning method: three-phase bidirectional pipe cleaning using air, water, and cleaning balls 14. In this case, close valve 10 near pumping equipment 1, open valve 10 on the branch pipe between piston air compressor 2 and filling pipe 7, open valve 10 on the branch pipe connected to one-way exhaust valve 8, and close valve 10 at the end of filling pipe 7. First, adjust the three-way valve 11 under integrated cleaning ball chamber 3 to allow one piston ball 15 to exit from the separator hopper 31 and enter filling pipe 7. Then, control valves 10 and 11 to supply high-pressure water and the mixture of cleaning balls 14 from high-pressure water chamber 4 and integrated cleaning ball chamber 3 through air-water mixing chamber 6 into filling pipe 7. After the mixture fills the entire filling pipe 7 downstream of piston ball 15, close valve 10 on the branch pipe connecting air-water mixing chamber 6 and filling pipe 7. Then, the bidirectional pipe cleaning process officially begins: First, the piston air compressor 2 pulls the piston in the reverse direction, creating negative pressure in the filling pipe 7, which pulls the piston ball 15 to enter through the one-way air inlet valve 9 at the tail end of the filling pipe 7. Because the gas is less dense than water, it moves upwards in the filling pipe 7 to the horizontal section at the ground surface. Then, the piston air compressor 2 pushes the piston ball 15 in the forward direction to expel air from the filling pipe 7. When water begins to flow from the one-way exhaust valve 8, the piston air compressor 2 pulls the piston ball 15 in the reverse direction again. After repeating this cycle multiple times, the valve 10 at the tail end of the filling pipe 7 is opened to release the mixture in the filling pipe 7. Through the bidirectional movement of the piston ball 15 driven by the piston air compressor 2, air is continuously introduced at the tail end and exhausted at the ground surface in the mixture of water and cleaning balls 14 in the filling pipe 7. The gas drives the water and cleaning balls 14 mixture in both directions, repeatedly impacting the stubborn deposits on the filling pipe 7. Combined with the friction of the rough concave surface 141 on the stubborn deposits, the pipe cleaning is more effective.

[0044] When using this pipe cleaning system to clean the filling pipeline 7, the above four methods can be flexibly combined. Generally, they should be combined in sequence. The efficient pipe cleaning system for mine filling can provide various pipe cleaning methods such as clean water pipe cleaning, air and water two-phase forward pipe cleaning, air, water and cleaning ball three-phase forward pipe cleaning, and air, water and cleaning ball three-phase bidirectional pipe cleaning. The pipe cleaning methods are flexible and diverse and can be combined arbitrarily. In actual use, the mine can flexibly select and determine the pipe cleaning method according to the actual situation of the filling system pipeline.

[0045] like Figure 1 As shown, if the cleaning balls 14 need to be recovered during or after pipe washing, the cleaning balls 14 are collected in the receiving bag 13 at the end of the filling pipe 7 before exiting the filling pipe 7. After pipe washing is completed, the discharge valve 12 is opened, and the piston air compressor 2 pushes and pulls the piston ball 15 to the discharge valve 12 port to discharge it.

[0046] like Figure 1 and Figure 2As shown, the integrated cleaning ball system of this pipe cleaning system has a partitioned compartment 31 that can hold various cleaning balls 14 of different diameters. When cleaning the pipe in the fourth cleaning method, the cleaning balls 14 can be flexibly selected according to the condition of the deposits in the pipe, or the pipe can be cleaned first with small diameter cleaning balls 14, and then gradually with large diameter cleaning balls 14. The maximum diameter of the cleaning ball 14 is 1 / 3 of the diameter of the filling pipe 7.

[0047] Working Principle: Current methods for cleaning filling pipelines in downfilling mine systems suffer from limitations. These methods are singular, consume large amounts of water, and are ineffective at quickly and efficiently removing stubborn deposits adhering to the pipeline walls, easily leading to blockages during refilling. By combining various devices, this system achieves flexible post-filling pipeline cleaning, enabling single-phase or multi-phase mixing of water, water vapor, and water balloons. It also allows for both forward and bidirectional water balloon cleaning. This not only more effectively removes stubborn deposits from the pipeline walls but also offers greater flexibility and water conservation, making it a flexible, efficient, and economical pipeline cleaning system.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0049] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A high-efficiency pipe washing system for mine backfilling, comprising pumping equipment (1) and backfilling pipeline (7) shared with the mine backfilling system, characterized in that, Also includes: A feng shui mixing chamber (6) is connected to a branch pipe of the surface pipe section of the filling pipe (7), and valves (10) are provided in the feng shui mixing chamber (6) and the filling pipe (7); A high-pressure water tank (4) is connected to the air-water mixing tank (6), and a valve (10) is provided between the high-pressure water tank (4) and the air-water mixing tank (6); An air compressor (5) is connected to the air-water mixing chamber (6); One-way vent valve (8) is connected to a branch pipe at the horizontal section before the filling pipe (7) enters the well, and a valve (10) is installed on the branch pipe.

2. The efficient pipe washing system for mine backfilling according to claim 1, characterized in that: A valve (10) is provided on the connecting pipe between the filling pipe (7) and the pumping equipment (1). A piston air compressor (2) is connected to a branch pipe of the filling pipe (7) near the pumping equipment (1). A valve (10) is provided on the connecting pipe between the piston air compressor (2) and the filling pipe (7).

3. The efficient pipe washing system for mine backfilling according to claim 1, characterized in that: An integrated cleaning ball chamber (3) is connected to a branch pipe of the feng shui mixing chamber (6). A three-way valve (11) is installed on the branch pipe between the integrated cleaning ball chamber (3) and the feng shui mixing chamber (6). The cleaning ball chamber (3) stores cleaning balls (14) and piston balls (15).

4. The efficient pipe washing system for mine backfilling according to claim 1, characterized in that: The end pipe of the filling pipe (7) is equipped with a one-way air inlet valve (9).

5. The efficient pipe washing system for mine backfilling according to claim 3, characterized in that: The three-way valve (11) is connected to the filling pipe (7) through a branch pipe. A discharge valve (12) is provided at the lower part of the branch pipe. The discharge valve (12) is located upstream of the interface between the air-water mixing chamber (6) and the filling pipe (7).

6. The efficient pipe washing system for mine backfilling according to claim 3, characterized in that: The integrated cleaning ball chamber (3) has a discharge channel (32) arranged parallel to the bottom. The discharge channel (32) is used to release and collect the cleaning balls (14) and piston balls (15) into the pipeline. Above the discharge channel (32) is a plate chamber, which is divided into multiple partitioned plate chambers (31) by partitions. The partitioned plate chambers (31) are used to store cleaning balls (14) and piston balls (15) of different diameters respectively. The discharge between each partitioned plate chamber (31) and the discharge channel (32) at the bottom is controlled by a gate (33).

7. The efficient pipe washing system for mine backfilling according to claim 3, characterized in that: The cleaning ball (14) is made of hollow steel ball and has a concave surface (141).

8. The efficient pipe washing system for mine backfilling according to claim 3, characterized in that: The piston ball (15) is a sphere with the outermost layer being rubber.

9. The efficient pipe washing system for mine backfilling according to claim 1, characterized in that: The filling pipe (7) is connected to a collection bag (13) at its tail end.

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