A mobile integrated automated grouting system for underground coal mines and its use method

Abstract

The present invention provides a movable integrated automated grouting system for underground coal mines and a method for using the system. The automated grouting system comprises a feeding device, which is used for conveying powder to the automated grouting system; a slurry making device, which is used for making slurry from the powder conveyed by the feeding device; a slurry storage device, which is used for storing the slurry made by the slurry making device; a grouting device, which is used for conveying the slurry in the slurry storage device; a moving mechanism, which is installed at the bottom of the automated grouting system and can move the grouting system as a whole; a control device, which is used for controlling the start and stop of the automated grouting system; dust removal is performed when the powder enters the slurry making barrel, and the working environment is improved. For the position to be grouted, it is only necessary to move the present invention as a whole to the grouting point, thereby reducing the labor intensity of workers and avoiding repeated disassembly and assembly of the device, thereby extending the service life of the grouting system and indirectly saving production costs.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine production equipment, and in particular relates to a movable integrated automated grouting system for underground coal mines and a use method thereof. Background Art

[0002] Due to the needs of underground coal mine grouting reinforcement, water blocking, gob retention, fire prevention and extinguishing, and gob filling, it is often necessary to build a grouting or filling station to make cement, fly ash, high water or ultra-high water materials into slurry, and then pump it to complete the grouting or filling project. The existing grouting or filling stations mainly have the following problems:

[0003] (1) Low automation, high labor intensity and low efficiency. Powder is mainly loaded into the mine in standard bags, and then the pulping work is completed by manual feeding. The labor intensity of the workers is extremely high, and the pulping efficiency is limited by the feeding speed and is difficult to improve. Although some mines have built temporary storage bins underground by excavating large-section chambers, they still need to be fed and loaded manually, and can only achieve semi-automatic pulping.

[0004] (2) 25kg or 50kg bag materials are mainly used, and it is difficult to use ton bags or bulk materials. Since the pulping system mainly adopts manual feeding, there is no effective unloading equipment underground. The powder material is mainly transported in bags and stacked manually. When it is used, it is transported to the place of use by carrying it on the shoulder or back, which is very labor-intensive.

[0005] (3) Grouting stations have poor mobility. Grouting points underground often need to be relocated, so grouting stations must be flexible and easy to move. Most coal mining companies currently use barrel mixing, and materials are mainly piled up, which requires digging chambers for storage, and lacks mobility.

[0006] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0007] The purpose of the present invention is to provide a movable integrated automated grouting system and a method of use for underground coal mines, so as to solve the problems existing in the above-mentioned prior art. The powder in the present invention is stored in a mobile powder tank truck and pneumatically conveyed. According to the slurry ratio, materials and water are added to the slurry barrel to realize full automation of the slurry making system. The system of the present invention is placed on a movable device and can be moved as a whole according to the needs of the project, which greatly reduces the labor intensity of the workers, improves the work efficiency of slurry making, and also improves the working environment.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] The present invention provides a mobile integrated automated grouting system for underground coal mines, the automated grouting system comprising:

[0010] A feeding device, the feeding device is used to convey powder to the automated grouting system;

[0011] A pulping device, the pulping device is connected to the feeding device and is used to make the powder conveyed by the feeding device into a slurry;

[0012] A slurry storage device, the slurry storage device is connected to the slurry making device and is used to store the slurry made by the slurry making device;

[0013] A grouting device, the grouting device is connected to the slurry storage device and is used to transport the slurry in the slurry storage device, and the grouting device stirs the slurry at a low speed to prevent the slurry from separating and settling;

[0014] A moving mechanism, wherein the bottom of the feeding device, the slurry making device, the slurry storage device and the grouting device are all provided with a moving mechanism for displacing the feeding device, the slurry making device, the slurry storage device and the grouting device;

[0015] A control device is electrically connected to the feeding device, the slurry making device, the grouting device and the slurry storage device, and is used to control the start and stop of the feeding device, the slurry making device, the slurry storage device and the grouting device.

[0016] According to the above-mentioned mobile integrated automated grouting system for underground coal mines, preferably, the feeding device comprises:

[0017] An air compressor, the air compressor is located in the feeding device and is used to suck the powder and transport it to the pulping device;

[0018] A feeding pipe is provided between the feeding device and the pulping device, one end of the feeding pipe is connected to the air compressor, and the other end is connected to the top of the pulping device, for conveying powder into the pulping device;

[0019] Preferably, the feeding device is a powder tanker.

[0020] According to the above-mentioned mobile integrated automated grouting system for underground coal mines, preferably, the slurry making device comprises:

[0021] A pulping barrel, which is a sealed structure and is located on one side of the feeding device, and is used for making slurry;

[0022] A slurry pump, the slurry pump is located between the slurry barrel and the slurry storage device, the inlet of the slurry pump is connected to the bottom of the slurry barrel through a slurry suction pipe, and the outlet of the slurry pump is connected to one end of a three-way reversing valve through a third row of slurry pipes, for circulating the slurry in the slurry barrel;

[0023] A three-way reversing valve, the three-way reversing valve is located above the slurry pump, one end of the three-way reversing valve is connected to the top of the slurry barrel through the second row of slurry pipes, one end is connected to the top of the slurry storage device through the third row of slurry pipes, and one end is connected to the outlet of the slurry pump through the first row of slurry pipes. The three-way reversing valve is electrically connected to the control device to control the flow direction of the slurry;

[0024] A weighing sensor is located below the pulping barrel and is electrically connected to the control device for weighing the weight of the pulping barrel.

[0025] According to the above-mentioned mobile integrated automated grouting system for underground coal mines, preferably, the slurry making device further comprises:

[0026] A dust collector, which is located above the pulping barrel and is electrically connected to the control device and is used to remove dust from the powder;

[0027] Preferably, the dust collector is a pulse dust collector.

[0028] According to the above-mentioned mobile integrated automated grouting system for underground coal mines, preferably, the slurry making device further comprises:

[0029] A static pressure water pipe, the outlet of which is arranged above the pulping barrel and is used to inject water into the pulping barrel;

[0030] An electromagnetic flowmeter, which is arranged on the pipeline of the static pressure water pipe and is used to measure the water output of the static pressure water pipe;

[0031] A ball valve is arranged on the pipeline of the static pressure water pipe and is located downstream of the electromagnetic flowmeter. The ball valve is electrically connected to the control device and is used to control the on-off of the static pressure water pipe.

[0032] According to the above-mentioned mobile integrated automated grouting system for underground coal mines, preferably, the slurry storage device comprises:

[0033] A slurry storage barrel, which is located at one side of the slurry making device and is used to store the slurry made by the slurry making device. The slurry storage barrel stirs the slurry at a low speed to prevent the slurry from separating and settling;

[0034] A liquid level meter is located above the slurry storage barrel and is electrically connected to the control device to monitor the slurry level in the slurry storage barrel.

[0035] According to the above-mentioned mobile integrated automated grouting system for underground coal mines, preferably, the grouting device comprises:

[0036] A grouting pump, the grouting pump is located on one side of the slurry storage device and is used to pump slurry;

[0037] A grouting pump suction pipe, one end of which is connected to the outlet at the bottom of the slurry storage device, and the other end is connected to the inlet of the grouting pump, for sucking the slurry in the slurry storage device;

[0038] The grouting pump slurry delivery pipe is connected to the outlet of the grouting pump and is used for conveying slurry.

[0039] The present invention also provides a method for using a mobile integrated automated grouting system in a coal mine, the method for using the automated grouting system comprising the following steps:

[0040] Step S1, the feeding device transports the powder to the pulping operation point;

[0041] Step S2, starting the slurry making device through the control device to make the powder into slurry;

[0042] Step S3, the slurry is transported through a grouting device to achieve grouting or filling.

[0043] According to the above-mentioned method for using the mobile integrated automated grouting system in underground coal mines, preferably, the step S2 specifically includes:

[0044] Step S201, the automated grouting system is started, the control device is powered on, and the slurry pump, agitator and air compressor are started in sequence;

[0045] Step S202, the ball valve is opened, and the static pressure water pipe supplies water to the pulping barrel. The water is measured by the electromagnetic flow meter. When the water volume required for pulping is reached, the ball valve is closed, and the static pressure water pipe stops supplying water to the pulping barrel;

[0046] Step S203, start the air compressor, the powder is dusted by the dust collector under the action of the air compressor and then enters the pulping barrel, the weight of the powder is weighed by the weighing sensor under the pulping barrel, and the powder is added to the preset amount, and the feeding is stopped. During this process, the slurry pump is always in operation, the powder and water pass through the slurry suction pipe, are stirred at high speed by the slurry pump, and are discharged into the pulping barrel through the first row of slurry pipes and the second row of slurry pipes. The slurry in the pulping barrel is in a vortex state, and this process is an internal circulation process;

[0047] Step S204, setting the stirring time, the pulping device performs internal circulation, and after the pulping is completed, the three-way reversing valve is reversed, and the slurry is transported to the slurry storage barrel through the first row of slurry pipes and the third row of slurry pipes;

[0048] Step S205, after the pulp in the pulping barrel is drained, repeat steps S202, S203, and S204 to continue the next cycle of pulping process;

[0049] Step S206: After the level meter on the slurry storage barrel detects that the slurry level in the slurry storage barrel has reached the upper limit of the preset warning value, the three-way reversing valve is reversed, and the slurry flows out from the bottom of the slurry making barrel through the slurry suction pipe, and is re-injected into the slurry making barrel through the first row of slurry pipes and the second row of slurry pipes, thereby realizing the internal circulation of the slurry in the slurry making barrel;

[0050] Step S207, after the liquid level in the slurry storage barrel is lower than the preset warning value lower limit, the three-way reversing valve is reversed to discharge the slurry into the slurry storage barrel to continue the slurry making cycle.

[0051] Compared with the closest prior art, the technical solution provided by the present invention has the following excellent effects:

[0052] The present invention provides a movable integrated automatic grouting system and a method for using it in a coal mine. When the powder in the automatic grouting system enters the slurry barrel, the dust collector is used to remove dust, thereby avoiding dust pollution caused by manual feeding into the storage silo, and improving the working environment in the coal mine. According to the slurry ratio requirements, the powder and water are automatically added to the slurry barrel, and the slurry barrel can also realize internal circulation, thereby avoiding the waste of resources caused by the solidification of the slurry. The entire slurrying process is operated by a control device, thereby realizing the full automation of the slurrying process, improving the slurrying efficiency, and the operator no longer needs to enter the coal mine shaft to operate the slurrying system, thereby improving the safety of production. The bottom of the automatic grouting system of the present invention is provided with a moving mechanism, which can move the automatic grouting system as a whole. When grouting is required, the present invention is moved as a whole to the grouting point, thereby greatly reducing the labor intensity of the workers, and also avoiding repeated disassembly and assembly of the device, extending the service life of the device, and indirectly saving production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a schematic diagram of the structure of the automated grouting system in an embodiment of the present invention.

[0054] In the figure: 1. feeding device; 2. air compressor; 3. feed pipe; 4. slurry barrel; 6. slurry pump; 7. slurry suction pipe; 8. weighing sensor; 9. three-way reversing valve; 10. first row of slurry pipes; 11. second row of slurry pipes; 12. third row of slurry pipes; 13. static pressure water pipe; 14. electromagnetic flowmeter; 15. ball valve; 16. dust collector; 17. slurry storage barrel; 18. liquid level meter; 19. agitator; 20. grouting pump; 21. grouting pump slurry suction pipe; 22. grouting pump slurry delivery pipe; 23. moving mechanism. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0056] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0057] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments may be combined with each other without conflict.

[0058] like Figure 1As shown, the present invention provides a mobile integrated automated pulping system for underground coal mines, the automated pulping system comprising a feeding device 1, the feeding device 1 is used to transport powder to a pulping operation point, the feeding device 1 in the embodiment of the present invention is preferably a small powder tanker, the use of a small powder tanker can freely enter and exit the coal mine, and the weight of the powder transported at a time is greater than the weight of the bag, the single transport volume is increased, no manual handling is required, the labor intensity of the workers is reduced, and the work efficiency is improved; the pulping device, the pulping device is connected to the feeding device 1, the pulping device transports the powder transported by the feeding device 1 The material is made into slurry; a slurry storage device, which is connected to the slurry making device and is used to store the slurry made by the slurry making device; a grouting device, which is connected to the slurry storage device and is used to transport the slurry in the slurry storage device; a moving mechanism 23, the bottom of the feeding device 1, the slurry making device, the slurry storage device and the grouting device are all provided with a moving mechanism 23, which is used to move the feeding device 1, the slurry making device, the slurry storage device and the grouting device as a whole; a control device, which is electrically connected to the feeding device 1, the slurry making device and the slurry storage device, and is used to control the start and stop of the feeding device 1, the slurry making device and the slurry storage device. The control device in the embodiment of the present invention is preferably a PLC control cabinet, and the model of the PLC control cabinet is not further limited. Any control cabinet that can control the operation of the equipment in this system can be used. The PLC control cabinet can complete equipment automation and process automation control, has stable operation and complete functions, and the staff can realize the automation of the entire pulping system by operating the control device.

[0059] Furthermore, in order to allow the powder to be easily transported to the pulping device, an air compressor 2 is installed in the feeding device in the embodiment of the present invention. The air compressor 2 is used to absorb the powder and transport it to the pulping device. In addition to using the air compressor, compressed air in the coal mine can also be used. The use of compressed air can greatly reduce the production cost. A feeding pipe 3 is arranged between the air compressor 2 and the pulping device. One end of the feeding pipe 3 is connected to the air compressor 2, and the other end is connected to the top of the pulping device, which is used to transport powder into the pulping device; the feeding pipe 3 is preferably an explosion-proof pipe. The use of the explosion-proof pipe will not cause the feeding pipe 3 to be damaged or leak due to the high pressure generated by the air compressor, thereby affecting the feeding effect.

[0060] Further, the pulping device includes a pulping barrel 4, which is a sealed structure and is located on the right side of the feeding device 1. It is a container for making slurry. The sealed structure of the pulping barrel 4 prevents dust from floating into the air and polluting the environment during the mixing process of the powder. The bottom of the pulping barrel 4 in the embodiment of the present invention is a wedge-shaped with a large upper opening and a small lower opening, and is connected to the slurry suction pipe 7. A bracket is provided on the outer wall of the pulping barrel 4, one end of the bracket is fixedly connected to the outer wall of the pulping barrel 4, and the other end is placed on the weighing sensor 8. Used to support the pulping barrel 4; a weighing sensor 8, which is located below the pulping barrel and is electrically connected to the control device, and is used to weigh the weight change of the pulping barrel 4; a slurry pump 6, which is located on the right side of the pulping barrel 4, and the inlet of the slurry pump 6 is connected to the outlet at the bottom of the pulping barrel 4 through a slurry suction pipe 7. A high-speed impeller is installed in the slurry pump, and the high-speed impeller is used to fully stir the powder and water. The outlet of the slurry pump 6 is connected to one end of the three-way reversing valve 9 through the third row of slurry pipes 12. The slurry pump 6 It is electrically connected to the control device, and the slurry pump 6 controls the slurry discharge in the slurry barrel 4; a three-way reversing valve 9, one end of the three-way reversing valve 9 is connected to the side wall of the top of the slurry barrel 4 through the second row of slurry pipes 11, one end is connected to the top of the slurry storage device through the third row of slurry pipes 12, and one end is connected to the outlet of the slurry pump 6 through the first row of slurry pipes 10. The three-way reversing valve 9 is electrically connected to the control device to control the flow direction of the slurry; a dust collector 16, which is electrically connected to the control device, The dust collector 16 is installed on the top of the pulping barrel 4, and is used to remove dust from the powder entering the pulping barrel 4. The dust collector 4 in the embodiment of the present invention is preferably a pulse dust collector. The pulse dust collector removes dust attached to the filter medium by blowing compressed air, and has a strong dust removal ability. In addition to the pulse dust collector, other equipment that can perform dust removal can be used, such as bag dust collectors. The installation of the dust collector 16 avoids dust pollution caused by the powder when feeding, and effectively protects the working environment underground in the coal mine.

[0061] Furthermore, a static pressure water pipe 13 is installed above the pulping barrel 4, one end of the static pressure water pipe 13 is connected to the water source, and the other end extends to the top of the pulping barrel 4 to inject water into the pulping barrel 4; an electromagnetic flowmeter 14, the electromagnetic flowmeter 14 is installed on the static pressure water pipe 13, and can detect the amount of water injected into the pulping barrel 4 by the static pressure water pipe 13; a ball valve 15, the ball valve 15 is installed downstream of the electromagnetic flowmeter 14, and the ball valve 15 is electrically connected to the control device to control the supply and stop of water. According to the ratio requirements, the water is metered through the electromagnetic flowmeter 14. After the ratio requirements are met, the ball valve 15 is closed to stop supplying water to the pulping barrel 4.

[0062] Specifically, the static pressure water pipe 13 supplies water to the pulping barrel 4, and the electromagnetic flowmeter 14 measures the water output. When the water volume required for pulping is reached, the ball valve 15 is closed to stop supplying water to the pulping barrel 4. When the water is added to the preset value, the air compressor 2 starts to transport powder to the pulping barrel 4. The powder enters the pulping barrel 4 after dust removal by the dust collector 16. According to the pulping ratio requirements, the weighing sensor 8 installed at the bottom of the pulping barrel 4 weighs the weight of the pulping barrel 4 in real time. When the preset value is reached, the air compressor 2 starts to transport the powder to the pulping barrel 4. The press 2 stops working and stops conveying powder into the pulping barrel 4. During the entire water adding process, the slurry pump 6 is always in the starting state. The slurry pump 6 sucks out the water in the pulping barrel 4 through the slurry suction pipe 7, and flows into the pulping barrel 4 through the third row of slurry pipes 12 and the first row of slurry pipes 10, forming an internal circulation and forming a vortex in the pulping barrel 4. When the powder enters the pulping barrel 4, the powder is fully stirred by the slurry pump 6 under the action of the circulation in the water. The powder can also be further stirred under the action of the vortex in the pulping barrel. The internal circulation time is set. The internal circulation time is specifically set according to the amount of slurry required on site to make slurry that meets the ratio requirements. Under the action of the slurry pump 6 and the internal circulation of the pulping barrel 4, the powder and water complete the pulping process in a shorter time, and the stirring efficiency is greatly improved. After the pulping is completed, the three-way reversing valve 9 is reversed to connect the first row of slurry pipes 10 and the third row of slurry pipes 12. The slurry pump 6 conveys the slurry in the pulping barrel 4 from the bottom through the slurry suction pipe 7. To the slurry storage barrel 17, when the slurry in the slurry storage barrel 17 reaches the preset warning value upper limit, the three-way reversing valve 9 is reversed again to connect the first row of slurry pipes 10 and the second row of slurry pipes 11. At this time, the slurry pump 6 draws the slurry in the slurry barrel 4 from the bottom and then re-injects it into the slurry barrel 4 through the second row of slurry pipes 11. In this way, the slurry pump 6, the first row of slurry pipes 10 and the second row of slurry pipes 11 are connected, so that the slurry in the slurry barrel 4 forms an internal circulation state, thereby avoiding the solidification of the slurry.

[0063] Furthermore, the slurry storage device includes a slurry storage barrel 17, which is located on the right side of the slurry pump 6 and is used to store the slurry prepared by the slurry making device. The capacity of the slurry storage barrel 17 is greater than that of the slurry making barrel 4. The slurry storage barrel 17 in the embodiment of the present invention is a low-speed stirring barrel, and the slurry storage barrel 17 stirs the slurry at a low speed to prevent the slurry from separating and settling. The slurry made by the slurry making device can be discharged into the slurry storage barrel 17 at any time to ensure the continuity of production; a liquid level meter 18, which is preferably an ultrasonic liquid level meter in the embodiment of the present invention. The ultrasonic liquid level meter is located above the slurry storage barrel 17 and is electrically connected to the control device to monitor the slurry level in the slurry storage barrel 17. In addition to the ultrasonic liquid level meter, other liquid level meters 18 for monitoring the liquid level are all acceptable, such as radar liquid level meters. When the ultrasonic liquid level meter detects the slurry storage When the slurry level in the barrel 17 reaches the upper limit of the preset warning value, the three-way reversing valve 9 is reversed to stop conveying slurry into the slurry storage barrel 17; an agitator 19 is installed in the slurry storage barrel 17, and the agitator 19 in the embodiment of the present invention is a low-speed agitator. The agitator 19 is located in the slurry storage barrel 17 and is electrically connected to the control device to stir the slurry in the slurry storage barrel 17 to prevent the slurry from separating and settling. The low-speed agitator can use a paddle agitator. The paddle agitator includes a motor, a stirring rod and a paddle blade. One end of the stirring rod is connected to the motor, and the other end extends into the slurry. The paddle blade is installed at the end of the stirring rod. Preferably, there are two paddle blades, which are symmetrically installed at the end of the stirring rod. The motor is connected to the control device, and the rotation of the motor drives the paddle blades connected to the stirring rod to rotate, and the paddle blades stir the slurry.

[0064] Furthermore, the grouting device includes a grouting pump 20 for filling the slurry in the slurry storage barrel 17; a grouting pump slurry suction pipe 21, one end of the grouting pump slurry suction pipe 21 is connected to the outlet at the bottom of the slurry storage barrel 17, and the other end is connected to the inlet of the grouting pump 20, so as to transport the slurry in the slurry storage barrel 17 to the grouting pump 20; when the liquid level meter 18 monitors that the slurry level in the slurry storage barrel 17 reaches the lower limit of the preset warning value, the three-way reversing valve 9 is reversed to continue to transport the slurry into the slurry storage barrel 17 to ensure the continuity of the grouting process, and a grouting pump slurry delivery pipe 22, which is connected to the outlet of the grouting pump 20. The grouting pump slurry delivery pipe 20 is preferably an explosion-proof hose. The slurry pressurized by the grouting pump 20 will generate a certain pressure. In order to ensure the construction safety during the slurry filling, an explosion-proof hose is selected as the grouting pump slurry delivery pipe 22.

[0065] Furthermore, the bottom of the pulping device, the pulp storage device and the grouting device in the automated grouting system of the present invention are all provided with a moving mechanism 23, such as a rail flatbed car or a rubber-wheeled car, etc., for moving the pulping device, the pulp storage device and the grouting device. The present invention does not specifically limit the shape, size and specific structure of the moving mechanism. Any moving mechanism 23 that can move the grouting system can be used. The feeding device 1 in the embodiment of the present invention is preferably a small powder tank car for conveying powder. The use of a small powder tank car facilitates the feeding device to smoothly enter and exit the coal mine. When other feeding devices 1 are selected, a rail flatbed car or a rubber-wheeled car is also installed at the bottom of the feeding device. In this way, the automated grouting system can be moved as a whole. For the place where grouting is to be performed, it is only necessary to move the present invention as a whole to the grouting point, which greatly reduces the labor intensity of the workers and avoids repeated disassembly and assembly of the device, thereby extending the service life of the device and indirectly saving production costs.

[0066] In the implementation of the present invention, the feeding device 1, the pulping device, the pulp storage device and the grouting device are all connected to the control device through a power supply cable. The number of the pulping barrel 4 and the pulp storage barrel 17 are both one. When double liquid or multiple slurries are mixed and used, multiple pulping barrels 4 and multiple pulp storage barrels 17 can be set. The setting method, setting process and use method are the same as the above-mentioned description process and will not be repeated.

[0067] The present invention also provides a method for using a mobile integrated automated grouting system in a coal mine. The method for using the automated grouting system comprises the following steps:

[0068] In step S1, the feeding device 1 transports the powder to the slurry making operation point, and the powder enters the coal mine through a small powder tank truck. According to the requirement of grouting volume, multiple small powder tank trucks can be selected to go down the mine at the same time.

[0069] Step S2, the operation control device starts the automatic pulping system to make the powder into slurry through conveying, mixing and stirring.

[0070] Step S201, the automated grouting system is started, the control device is powered on, and the slurry pump 6, the agitator 19 and the air compressor 2 are started in sequence.

[0071] Step S202, open the ball valve 15, the static pressure water pipe 13 supplies water to the pulping barrel 4, the water is measured by the electromagnetic flowmeter 14, and when the water volume required for pulping is reached, the ball valve 15 is closed and the static pressure water pipe 13 stops supplying water to the pulping barrel 4.

[0072] Step S203, start the air compressor 2, and the powder is dusted by the dust collector 16 under the action of the air compressor 2 and then enters the pulping barrel 4, and the weight of the powder is weighed by the weighing sensor 8 under the pulping barrel 4. After the powder is added to the preset amount, the feeding is stopped. During this process, the slurry pump 6 is always in operation, and the powder and water pass through the slurry suction pipe 7, are stirred at high speed by the slurry pump 6, and are discharged into the pulping barrel 4 through the first row of slurry pipes 10 and the second row of slurry pipes 11. The slurry in the pulping barrel 4 is in a vortex state. This process is an internal circulation process.

[0073] Step S204, setting the stirring time, the pulping device performs internal circulation, and after the pulping is completed, the three-way reversing valve 9 is reversed, and the slurry is transported to the slurry storage barrel 17 through the first row of slurry pipes 10 and the third row of slurry pipes 12. The slurry in the slurry storage barrel 17 is in a flowing state at all times under the action of the agitator 19 to prevent the slurry from separating and settling in the slurry storage barrel 17.

[0074] Step S205, after the pulp in the pulping barrel 4 is drained, steps S202, S203 and S204 are repeated to continue the next cycle of pulping process.

[0075] Step S206, a liquid level meter 18 is installed on the slurry storage barrel 17 to monitor the slurry level in the slurry storage barrel 17. When the slurry level reaches a preset warning value, the three-way reversing valve 9 is reversed, and the slurry flows out from the bottom of the slurry making barrel 4 through the slurry suction pipe 7, and is re-injected into the slurry making barrel 4 through the first row of slurry pipes 10 and the second row of slurry pipes 11, thereby realizing the internal circulation of the slurry in the slurry making barrel 4.

[0076] Step S207, after the slurry level in the slurry storage barrel 17 is lower than the preset warning value, the three-way reversing valve 9 is reversed to discharge the slurry into the slurry storage barrel 17 to continue the slurry making cycle.

[0077] In step S3, the prepared slurry is transported by the grouting pump 20. The grouting pump 20 draws out the slurry from the bottom of the slurry storage barrel 17 through the grouting pump suction pipe 21, and outputs it through the grouting pump 20 through the grouting pump slurry delivery pipe 22 to fill the position in the well that needs grouting.

[0078] In summary, the present invention provides a movable integrated automated grouting system and a method of use for underground coal mines. When the powder in the automated grouting system enters the slurry making barrel 4, the dust collector 16 is used to remove dust, thereby avoiding dust pollution caused by manual feeding into the storage silo. The working environment underground in the coal mine is improved. According to the slurry ratio requirements, powder and water are automatically added to the slurry making barrel 4. The slurry making barrel 4 can also realize internal circulation, thereby avoiding waste of resources caused by slurry solidification. The entire slurrying process is operated by a control device, thereby realizing full automation of the slurrying process and improving slurrying efficiency. Operators no longer need to enter the coal mine shaft to operate the slurrying system, thereby improving production safety. The bottom of the automated grouting system of the present invention is provided with a moving mechanism 23, which can move the automated grouting system as a whole. For the place where grouting is to be performed, it is only necessary to move the present invention as a whole to the grouting point, thereby greatly reducing the labor intensity of workers and avoiding repeated disassembly and assembly of the device, thereby extending the service life of the device and indirectly saving production costs.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A mobile integrated automated grouting system for underground coal mines, characterized in that: The automated grouting system comprises: A feeding device, the feeding device is used to convey powder to the automated grouting system; a pulping device, the pulping device being connected to the feeding device and used to make the powder delivered by the feeding device into a slurry; a slurry storage device, the slurry storage device being connected to the pulping device and used to store the slurry made by the pulping device; A grouting device, the grouting device is connected to the slurry storage device and is used to transport the slurry in the slurry storage device, and the grouting device stirs the slurry at a low speed to prevent the slurry from separating and settling; A moving mechanism, wherein the bottom of the feeding device, the slurry making device, the slurry storage device and the grouting device are all provided with a moving mechanism for displacing the feeding device, the slurry making device, the slurry storage device and the grouting device; A control device, wherein the control device is electrically connected to the feeding device, the slurry making device, the grouting device and the slurry storage device, and is used to control the start and stop of the feeding device, the slurry making device, the slurry storage device and the grouting device; The pulping device comprises: A pulping barrel, which is a sealed structure and is located on one side of the feeding device, and is used for making slurry; A slurry pump, the slurry pump is located between the slurry barrel and the slurry storage device, the inlet of the slurry pump is connected to the bottom of the slurry barrel through a slurry suction pipe, and the outlet of the slurry pump is connected to one end of a three-way reversing valve through a first row of slurry pipes, for circulating the slurry in the slurry barrel; A three-way reversing valve, the three-way reversing valve is located above the slurry pump, one end of the three-way reversing valve is connected to the top of the slurry barrel through the second row of slurry pipes, one end is connected to the top of the slurry storage device through the third row of slurry pipes, and one end is connected to the outlet of the slurry pump through the first row of slurry pipes. The three-way reversing valve is electrically connected to the control device to control the flow direction of the slurry; A weighing sensor, which is located below the pulping barrel and is electrically connected to the control device and is used to weigh the weight of the pulping barrel; The bracket is arranged on the outer wall of the pulping barrel, one end of the bracket is fixedly connected to the outer wall of the pulping barrel, and the other end is placed on the weighing sensor, so as to support the pulping barrel.

2. The mobile integrated automated grouting system for underground coal mines according to claim 1, characterized in that: The feeding device comprises: An air compressor, the air compressor is located in the feeding device and is used to suck the powder and transport it to the pulping device; A feeding pipe is provided between the feeding device and the pulping device, one end of the feeding pipe is connected to the air compressor, and the other end is connected to the top of the pulping device for conveying powder into the pulping device; the feeding device is a powder tank truck.

3. The mobile integrated automated grouting system for underground coal mines according to claim 1, characterized in that: The pulping device also includes: A dust collector is located above the pulping barrel and is electrically connected to the control device for removing dust from the powder; the dust collector is a pulse dust collector.

4. The mobile integrated automated grouting system for underground coal mines according to claim 3, characterized in that: The pulping device also includes: A static pressure water pipe, the water outlet of which is arranged above the pulping barrel and is used to inject water into the pulping barrel; An electromagnetic flowmeter, which is arranged on the pipeline of the static pressure water pipe and is used to measure the water output of the static pressure water pipe; A ball valve is arranged on the pipeline of the static pressure water pipe and is located downstream of the electromagnetic flowmeter. The ball valve is electrically connected to the control device and is used to control the on-off of the static pressure water pipe.

5. The mobile integrated automated grouting system for underground coal mines according to claim 1, characterized in that: The slurry storage device comprises: A slurry storage barrel, which is located at one side of the slurry making device and is used to store the slurry made by the slurry making device. The slurry storage barrel stirs the slurry at a low speed to prevent the slurry from separating and settling; A liquid level meter is located above the slurry storage barrel and is electrically connected to the control device to monitor the slurry level in the slurry storage barrel.

6. The mobile integrated automated grouting system for underground coal mines according to claim 1, characterized in that: The grouting device comprises: A grouting pump, the grouting pump is located on one side of the slurry storage device and is used to pump slurry; A grouting pump suction pipe, one end of which is connected to the outlet at the bottom of the slurry storage device, and the other end is connected to the inlet of the grouting pump, for sucking the slurry in the slurry storage device; The grouting pump slurry delivery pipe is connected to the outlet of the grouting pump and is used for conveying slurry.

7. A method for using a mobile integrated automated grouting system in a coal mine, characterized in that: Utilizing the coal mine underground movable integrated automated grouting system according to any one of claims 1 to 6, the method for using the automated grouting system comprises the following steps: Step S1, the feeding device transports the powder to the pulping operation point; Step S2, starting the slurry making device through the control device to make the powder into slurry; Step S3, the slurry is transported through a grouting device to achieve grouting or filling; The step S2 specifically includes: Step S201, the automated grouting system is started, the control device is powered on, and the slurry pump, agitator and air compressor are started in sequence; Step S202, the ball valve is opened, and the static pressure water pipe supplies water to the pulping barrel. The water is measured by the electromagnetic flow meter. When the water volume required for pulping is reached, the ball valve is closed, and the static pressure water pipe stops supplying water to the pulping barrel; Step S203, start the air compressor, the powder is dusted by the dust collector under the action of the air compressor and then enters the pulping barrel, the weight of the powder is weighed by the weighing sensor under the pulping barrel, and the powder is added to the preset amount, and the feeding is stopped. During this process, the slurry pump is always in operation, the powder and water pass through the slurry suction pipe, are stirred at high speed by the slurry pump, and are discharged into the pulping barrel through the first row of slurry pipes and the second row of slurry pipes. The slurry in the pulping barrel is in a vortex state, and this process is an internal circulation process; Step S204, setting the stirring time, the pulping device performs internal circulation, and after the pulping is completed, the three-way reversing valve is reversed, and the slurry is transported to the slurry storage barrel through the first row of slurry pipes and the third row of slurry pipes; Step S205, after the pulp in the pulping barrel is drained, repeat steps S202, S203, and S204 to continue the next cycle of pulping process; Step S206: After the level meter on the slurry storage barrel detects that the slurry level in the slurry storage barrel has reached the upper limit of the preset warning value, the three-way reversing valve is reversed, and the slurry flows out from the bottom of the slurry making barrel through the slurry suction pipe, and is re-injected into the slurry making barrel through the first row of slurry pipes and the second row of slurry pipes, thereby realizing the internal circulation of the slurry in the slurry making barrel; Step S207, after the liquid level in the slurry storage barrel is lower than the preset warning value lower limit, the three-way reversing valve is reversed to discharge the slurry into the slurry storage barrel to continue the slurry making cycle.

Images