Goaf filling equipment

Abstract

The invention discloses goaf filling equipment, and relates to the technical field of goaf filling, the goaf filling equipment comprises a main body mechanism, the main body mechanism comprises three bottom platforms, the upper surface of each bottom platform is fixedly provided with a delivery pump, the upper surface of each delivery pump is fixedly provided with a material box, and the material box is fixedly provided with a material storage box; the goaf filling equipment comprises a plurality of conveying pumps, the interiors of the conveying pumps fixedly communicate with discharging pipes, the outer sides of the three discharging pipes are jointly provided with a conveying and recycling mechanism, the conveying and recycling mechanism comprises multiple conveying units, and the multiple conveying units are located on the outer sides of the discharging pipes. And when the material conveying pipe needs to be cleaned, water is introduced into the material conveying pipe, the effect of flushing residual materials in the material conveying pipe in time can be achieved, the purpose of discharging waste and water generated after cleaning is achieved through lifting of a discharging plug, and cleaning of the previous waste is facilitated before another material is conveyed.

Description

Technical Field

[0001] The present invention relates to the technical field of goaf filling, and particularly to a goaf filling device. Background Art

[0002] There is coal covered under the end slope of an open-pit mine. The covered coal is mined strip by strip in sequence or by skip mining at intervals. After the covered coal is mined, mined-out stopes will be left. Too many mined-out stopes will inevitably reduce the stability of the end slope, and then cause the collapse of the end slope. To avoid this problem, it is necessary to fill the mined-out stopes with filling materials. The filling materials are filled from the inner direction of the stope gradually to the outer direction of the stope until the whole stope is filled. The filling materials replace the originally covered coal to provide support for the end slope and ensure the stability of the end slope.

[0003] Generally, a goaf filling device is composed of structures such as a grouting pump, a mixer, and conveying pipe fittings, etc., which inject filling materials into the goaf. Since different materials are used for goaf filling and the same pipe fittings are needed for conveying, when conveying different materials, it is necessary to change the injected materials in the grouting pump. Conveying different materials in the same pipe fittings will cause mixing between the materials and easily block the pipeline. The existing goaf filling devices are inconvenient for cleaning and recycling the materials in the pipeline, which is not conducive to reducing the mixing between various materials when conveying different materials.

[0004] Combining the above problems, we will find that when the existing goaf filling devices on the market are in use, it is very difficult to avoid the above-mentioned problems at the same time. And even if they can be solved, external tools need to be used for cooperation to solve them, so that the desired effect cannot be achieved. Therefore, we propose a goaf filling device. Summary of the Invention

[0005] The purpose of the present invention is to provide a goaf filling device to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A goaf filling device includes a main body mechanism. The main body mechanism includes three bottom platforms. On the upper surface of each bottom platform, a delivery pump is fixedly installed. On the upper surface of each delivery pump, a material box is fixedly installed. Inside each delivery pump, a discharge pipe is fixedly communicated. A conveying and recycling mechanism is jointly arranged outside the three discharge pipes; The conveying and recycling mechanism includes a multi-channel conveying unit. The multi-channel conveying unit is located outside the discharge pipe and is used to control the conveying and discharging positions of different materials; The conveying and recycling mechanism further includes a material recycling unit. The material recycling unit is located below the multi-channel conveying unit and is used to clean the conveying pipeline and recycle the waste generated by the cleaning; A material separation and collection mechanism is provided below the material recovery unit. The material separation and collection mechanism is located outside the transfer pump and is used to separately collect the recycled waste materials.

[0007] Preferably, the multi-channel transfer unit includes a four-way pipe. Three ends of the four-way pipe are fixedly communicated with the inside of the discharge pipe, and the other end of the four-way pipe is fixedly communicated with a feed pipe. An installation pipe is fixedly communicated with the outer wall of the feed pipe. A telescopic rod is fixedly installed on the inner wall of the installation pipe. The telescopic end of the telescopic rod is fixedly installed with a connecting rod, and the bottom end of the connecting rod is fixedly installed with a discharge plug. A discharge pipe is fixedly communicated with the outer wall of the feed pipe, and the inner wall of the discharge pipe is in contact with the outer surface of the discharge plug. Three control pipes are fixedly communicated with the inside of the four-way pipe. A bracket is fixedly installed on the outer surface of the four-way pipe. Three single-axis cylinders are fixedly installed on the inner top wall of the bracket. The telescopic end of each single-axis cylinder is in contact with the top of the bracket. The telescopic end of each single-axis cylinder is fixedly installed with a fixing plate. A slide bar is fixedly installed on the bottom surface of each fixing plate. Each slide bar slides inside the bracket. The bottom end of each slide bar is fixedly installed with a sealing block. The outer surface of each sealing block is in contact with the inner wall of the control pipe. A baffle is fixedly installed on the bottom surface of each sealing block, and each baffle is located inside the four-way pipe.

[0008] Preferably, the material recovery unit includes a recovery material pipe. The inner wall of the recovery material pipe is fixedly connected to the outer surface of the feed pipe. A feed cavity is formed inside the recovery material pipe. A number of identical driven blades are arranged inside the feed cavity, and the number of the driven blades is symmetrically arranged. The outer surfaces of two of the driven blades are rotatably connected to the inner wall of the recovery material pipe. A number of identical driving blades are arranged inside the feed cavity, and each driving blade is located between the driven blades. A support shaft is fixedly installed at the rear end of one of the driving blades. A first motor is fixedly installed on one side of the recovery material pipe close to the four-way pipe. The output end of the first motor and the outer surface of the support shaft are both fixedly installed with a first pulley. The outer surfaces of the two first pulleys are commonly driven by a first synchronous belt. A second pulley is fixedly installed at the front end of the support shaft. The outer surface of the second pulley is driven by two second synchronous belts. The inner ring of each second synchronous belt is driven by a third pulley. The inner wall of each third pulley is fixedly connected to the outer surface of the driven blade. An inclined material pipe is fixedly communicated with the inside of the feed cavity. The inside of the inclined material pipe is fixedly communicated with the inside of the discharge pipe. A second motor is fixedly installed at one end of the inclined material pipe. The output end of the second motor is fixedly installed with a feeding blade, and the top end of the feeding blade is located inside the feed cavity.

[0009] Preferably, a first coupling is fixedly installed on the outer surfaces of every two of the driven blades together, and each of the driven blades at the front end and the rear end has only one first coupling.

[0010] Preferably, a second coupling is fixedly installed on the outer surfaces of every two of the driving blades together, and each of the driving blades at the front end and the rear end has only one second coupling.

[0011] Preferably, the material distribution and collection mechanism includes a water collecting pool which is located below the recycling material pipe. An inclined guide plate is fixedly installed on the right side surface of the water collecting pool. An aggregate pool is fixedly installed on the right side surface of the inclined guide plate. Two filter meshes are fixedly installed on the inner wall of the inclined guide plate. A discharge pipe is fixedly communicated inside the recycling material pipe, and the discharge pipe is located directly above the filter meshes.

[0012] Preferably, a lifting bottom plate is arranged inside the aggregate pool, and the upper surface of the lifting bottom plate is inclined from left to right.

[0013] Preferably, two groups of hanging plates are fixedly installed on the upper surface of the lifting bottom plate, and the two groups of hanging plates are respectively located at the four corners of the top of the lifting bottom plate.

[0014] Preferably, two groups of hanging ropes are arranged inside the aggregate pool, and each group of hanging ropes is fixedly installed on the inner wall of the hanging plate.

[0015] Preferably, two groups of guide blocks are fixedly installed on the upper surface of the aggregate pool, and the inner walls of each group of guide blocks are in contact with the outer surfaces of the hanging ropes.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: By providing a multi-channel conveying unit, the present invention controls the conveying of different materials. When it is necessary to clean the conveying pipe, water is introduced into the conveying pipe, which can play a role in flushing the residual materials inside the conveying pipe in time. By lifting the discharge plug, the waste materials and water generated after cleaning are discharged, which is beneficial to cleaning the previous waste materials before conveying another material and avoiding the mixing of different materials.

[0017] By providing a material recycling unit, the present invention can convey waste materials and water in the recycling material pipe, achieve the purpose of reverse recycling of waste materials and water in the pipeline, avoid the situation of recycling materials in the goaf area, and cooperate with the multi-channel conveying unit to complete the cleaning of waste materials, so as to avoid the problems of unevenness or mutual influence caused by the mixing of materials.

[0018] By providing a material distribution and collection mechanism, the present invention can separate waste materials and water, play a role in separately collecting waste materials and water, achieve the purpose of classified recycling of water and waste materials, and is beneficial to the reuse of water and waste materials. Description of the Drawings

[0019] Figure 1 is the schematic structural diagram of the whole invention; Figure 2 is the schematic structural diagram of the four-way pipe of the invention; Figure 3 is the cross-sectional view of the bracket of the invention; Figure 4 is the cross-sectional view of the recycled material pipe of the invention; Figure 5 is the schematic structural diagram of the active blade of the invention; Figure 6 is the schematic structural diagram of the first synchronous belt of the invention; Figure 7 is the cross-sectional view of the discharge pipe of the invention; Figure 8 is the schematic structural diagram of the filter screen of the invention; Figure 9 is the schematic structural diagram of the lifting bottom plate of the invention.

[0020] In the figure: 1. Main body mechanism; 11. Base table; 12. Delivery pump; 13. Material box; 14. Discharge pipe; 2. Delivery and recycling mechanism; 21. Multi-channel delivery unit; 2101. Four-way pipe; 2102. Control material pipe; 2103. Bracket; 2104. Fixed plate; 2105. Slide bar; 2106. Baffle; 2107. Sealing block; 2108. Single-axis cylinder; 2109. Feed pipe; 2110. Installation pipe; 2111. Expansion rod; 2112. Connecting rod; 2113. Discharge plug; 2114. Discharge pipe; 22. Material recycling unit; 2201. Recycled material pipe; 2202. Feed cavity; 2203. Driven blade; 2204. Active blade; 2205. First motor; 2206. First coupling; 2207. Second pulley; 2208. Support shaft; 2209. First pulley; 2210. First synchronous belt; 2211. Third pulley; 2212. Second synchronous belt; 2213. Second motor; 2214. Inclined material pipe; 2215. Feeding blade; 2216. Second coupling; 3. Material distribution and collection mechanism; 301. Collection pool; 302. Aggregate pool; 303. Filter screen; 304. Inclined guide plate; 305. Guide block; 306. Lifting bottom plate; 307. Suspension rope; 308. Suspension plate; 309. Discharge pipe. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Example 1: Please refer to Figures 1 - 3 and Figure 7 , the present invention provides a technical solution: a goaf filling device, including a main body mechanism 1. The main body mechanism 1 includes three bottom platforms 11. A delivery pump 12 is fixedly installed on the upper surface of each bottom platform 11. A material box 13 is fixedly installed on the upper surface of each delivery pump 12. A discharge pipe 14 is fixedly communicated inside each delivery pump 12. A delivery and recovery mechanism 2 is jointly arranged outside the three discharge pipes 14; The delivery and recovery mechanism 2 includes a multi-channel delivery unit 21. The multi-channel delivery unit 21 is located outside the discharge pipe 14 and is used to control the delivery and discharge positions between different materials.

[0023] As a further limitation of the delivery and recovery mechanism 2 of the present invention, the multi-channel delivery unit 21 includes a four-way pipe 2101. Three ends of the four-way pipe 2101 are fixedly communicated with the inside of the discharge pipe 14. The other end of the four-way pipe 2101 is fixedly communicated with a delivery pipe 2109. A mounting pipe 2110 is fixedly communicated with the outer wall of the delivery pipe 2109. A telescopic rod 2111 is fixedly installed on the inner wall of the mounting pipe 2110. A connecting rod 2112 is fixedly installed at the telescopic end of the telescopic rod 2111. A discharge plug 2113 is fixedly installed at the bottom end of the connecting rod 2112. A discharge pipe 2114 is fixedly communicated with the outer wall of the delivery pipe 2109. The inner wall of the discharge pipe 2114 is in contact with the outer surface of the discharge plug 2113. Three control material pipes 2102 are fixedly communicated with the inside of the four-way pipe 2101. A bracket 2103 is fixedly installed on the outer surface of the four-way pipe 2101. Three single-axis cylinders 2108 are fixedly installed on the inner top wall of the bracket 2103. The telescopic end of each single-axis cylinder 2108 is in contact with the top of the bracket 2103. A fixing plate 2104 is fixedly installed at the telescopic end of each single-axis cylinder 2108. A sliding rod 2105 is fixedly installed on the bottom surface of each fixing plate 2104. Each sliding rod 2105 slides inside the bracket 2103. A sealing block 2107 is fixedly installed at the bottom end of each sliding rod 2105. The outer surface of each sealing block 2107 is in contact with the inner wall of the control material pipe 2102. A baffle 2106 is fixedly installed on the bottom surface of each sealing block 2107. Each baffle 2106 is located inside the four-way pipe 2101. By setting the multi-channel delivery unit 21, the delivery of different materials is controlled. And when it is necessary to clean the delivery pipe 2109, by introducing water into the delivery pipe 2109, it can play a role in flushing the residual materials inside the delivery pipe 2109 in time. By using the lifting of the discharge plug 2113, the purpose of discharging the waste materials and water generated after cleaning is realized, which is beneficial to cleaning the previous waste materials before delivering another material and avoiding the mixing of different materials.

[0024] The specific implementation of this embodiment is as follows: The material box 13 stores different filling materials, one of which stores water. According to the different materials to be conveyed, the corresponding conveying pump 12 can be started, and the corresponding single-axis cylinder 2108 can be started. The conveying pump 12 inputs the material from the discharge pipe 14 into the four-way pipe 2101. The single-axis cylinder 2108 can drive the slide bar 2105 through the extension of the telescopic end via the fixed plate 2104. The slide bar 2105 drives the sealing block 2107 to rise, and the sealing block 2107 drives the baffle plate 2106 to rise. The baffle plate 2106 opens the inside of the four-way pipe 2101, and the material enters the conveying pipe 2109 through the four-way pipe 2101. The conveying pipe 2109 inputs the filling material to the gob area for filling. After the material filling is completed, when another material needs to be filled, water needs to be introduced first. The water flows in the conveying pipe 2109 to wash the residual material in the conveying pipe 2109 in time. When the water flow reaches the discharge plug 2113, the telescopic rod 2111 extends. The telescopic rod 2111 is also electrically controlled. The telescopic rod 2111 presses down the discharge plug 2113, and the discharge plug 2113 enters the inside of the discharge pipe 2114, and the water flow will flow into the inside of the discharge pipe 2114. It should be noted that when the conveying pipe 2109 conveys water, the end of the conveying pipe 2109 close to the gob area can be blocked by an externally connected plug or blocking device to prevent the water flow from directly entering the gob area when flushing the residual material.

[0025] Embodiment 2: Please refer to Figure 1 and Figures 4 - 7 , the present invention provides a technical solution: a gob filling device. The present invention makes corresponding improvements to the technical problems mentioned in the background technology. The conveying and recycling mechanism 2 further includes a material recycling unit 22. The material recycling unit 22 is located below the multi-way conveying unit 21. The material recycling unit 22 is used to clean the conveying pipeline and recycle the waste generated by the cleaning.

[0026] As a further limitation of the conveying and recycling mechanism 2 of the present invention, the material recycling unit 22 includes a recycling material pipe 2201. The inner wall of the recycling material pipe 2201 is fixedly connected to the outer surface of the material conveying pipe 2109. A material conveying cavity 2202 is formed inside the recycling material pipe 2201. A number of identical driven blades 2203 are arranged inside the material conveying cavity 2202, and the number of driven blades 2203 are symmetrically arranged. The outer surfaces of two of the driven blades 2203 are rotatably connected to the inner wall of the recycling material pipe 2201. A number of identical driving blades 2204 are arranged inside the material conveying cavity 2202, and each driving blade 2204 is located between the driven blades 2203. A support shaft 2208 is fixedly installed at the rear end of one of the driving blades 2204. A first motor 2205 is fixedly installed on one side of the recycling material pipe 2201 close to the four-way pipe 2101. First belt pulleys 2209 are fixedly installed on the output end of the first motor 2205 and the outer surface of the support shaft 2208. A first synchronous belt 2210 is commonly connected to the outer surfaces of the two first belt pulleys 2209. A second belt pulley 2207 is fixedly installed at the front end of the support shaft 2208. Two second synchronous belts 2212 are connected to the outer surface of the second belt pulley 2207. The inner ring of each second synchronous belt 2212 is connected to a third belt pulley 2211. The inner wall of each third belt pulley 2211 is fixedly connected to the outer surface of the driven blade 2203. An inclined material pipe 2214 is fixedly communicated inside the material conveying cavity 2202. The inside of the inclined material pipe 2214 is fixedly communicated with the inside of the discharge pipe 2114. A second motor 2213 is fixedly installed at one end of the inclined material pipe 2214. A feeding blade 2215 is fixedly installed at the output end of the second motor 2213. The top end of the feeding blade 2215 is located inside the material conveying cavity 2202. By providing the material recycling unit 22, it can play a role in conveying waste materials and water inside the recycling material pipe 2201, achieving the purpose of reverse recycling of waste materials and water in the pipeline, avoiding the situation of recycling materials in the goaf area, and cooperating with the multi-way conveying unit 21 to complete the cleaning of waste materials, so as to avoid the problem that the materials are not uniform enough or affect each other due to material mixing; Please refer to Figure 5 , a first coupling 2206 is fixedly installed on the common outer surface of every two driven blades 2203, and each of the driven blades 2203 at the front end and the rear end only has one first coupling 2206. By providing the first coupling 2206, since the conveying pipeline is relatively long and the driven blades 2203 cannot meet the length of the conveying pipeline, the first coupling 2206 can complete the connection between the driven blades 2203; Please refer to Figure 5, on the outer surfaces of every two adjacent driving blades 2204, a second coupling 2216 is fixedly installed in common. Moreover, each of the driving blades 2204 located at the front end and the rear end only has one second coupling 2216. By providing the second coupling 2216, which has the same function as the first coupling 2206, the driving blades 2204 can be connected, and the disassembly of the driving blades 2204 can also be completed.

[0027] The specific implementation of this embodiment is as follows: The waste generated by water flushing enters the inclined material pipe 2214 through the discharge pipe 2114. After entering the inclined material pipe 2214, the second motor 2213 is used. The second motor 2213 drives the feeding blade 2215 to rotate. The feeding blade 2215 conveys the blades and waste to the feeding chamber 2202 and accumulates at the bottom of the feeding chamber 2202. As the waste is input into the feeding chamber 2202, the first motor 2205 can be started. The first motor 2205 drives the support shaft 2208 to rotate through the first pulley 2209 and the first synchronous belt 2210. The support shaft 2208 can cooperate with the second pulley 2207 to drive the second synchronous belt 2212 and the third pulley 2211 to rotate. The driving blade 2204 and the driven blade 2203 are respectively driven by the support shaft 2208 and the third pulley 2211 to rotate. The driving blade 2204 and the driven blade 2203 move the waste and water to the front end of the feeding chamber 2202.

[0028] Embodiment Three: Please refer to Figure 1 , Figure 4 , Figure 8 and Figure 9 , the present invention provides a technical solution: a goaf filling device. The present invention makes corresponding improvements to the technical problems mentioned in the background art. A material distribution and collection mechanism 3 is provided below the material recovery unit 22. The material distribution and collection mechanism 3 is located outside the delivery pump 12. The material distribution and collection mechanism 3 is used to separately collect the recovered waste.

[0029] As a further limitation of the material distribution and collection mechanism 3 of the present invention, the material distribution and collection mechanism 3 includes a water collecting pool 301. The water collecting pool 301 is located below the recovery material pipe 2201. An inclined guide plate 304 is fixedly installed on the right side surface of the water collecting pool 301. An aggregate pool 302 is fixedly installed on the right side surface of the inclined guide plate 304. Two filter meshes 303 are fixedly installed on the inner wall of the inclined guide plate 304. A discharge pipe 309 is fixedly communicated inside the recovery material pipe 2201. The discharge pipe 309 is located directly above the filter meshes 303. By providing the material distribution and collection mechanism 3, the waste and water can be separated, playing the role of separately collecting the waste and water, achieving the purpose of classifying and recycling the water and waste, and being beneficial to the reuse of the water and waste. Please refer to Figure 9, a lifting bottom plate 306 is arranged inside the aggregate pool 302, and the upper surface of the lifting bottom plate 306 is inclined from left to right. By arranging the lifting bottom plate 306 with a certain inclination, it can prevent materials from piling up vertically in one place, and by using the lifting of the lifting bottom plate 306, the materials can be taken out; Please refer to Figure 9 , two groups of hanging plates 308 are fixedly installed on the upper surface of the lifting bottom plate 306, and the two groups of hanging plates 308 are respectively located at the four corners of the top of the lifting bottom plate 306. By arranging the hanging plates 308, they are used for the hoisting of the lifting bottom plate 306, which is convenient for hoisting and lifting the lifting bottom plate 306; Please refer to Figure 9 , two groups of suspension ropes 307 are arranged inside the aggregate pool 302, and each group of suspension ropes 307 is fixedly installed on the inner wall of the hanging plate 308. By arranging the suspension ropes 307, the suspension ropes 307 are made of high-strength metal materials to adapt to the weight of the waste on the lifting bottom plate 306; Please refer to Figure 8 , two groups of guide blocks 305 are fixedly installed on the upper surface of the aggregate pool 302, and the inner wall of each group of guide blocks 305 is in contact with the outer surface of the suspension rope 307. By arranging the guide blocks 305, the suspension ropes 307 can be supported, the wear of the suspension ropes 307 can be reduced, and the stability during the pulling of the suspension ropes 307 can be ensured.

[0030] The specific implementation manner of this embodiment is as follows: The waste materials that move to the front end of the material conveying cavity 2202 will be discharged through the discharge pipe 309. The discharged water and waste materials will first fall on the filter screen 303. The filter screen 303 retains the solid waste materials. With the flushing of water, the fixed waste materials are washed away. The fixed waste materials fall from the filter screen 303 into the aggregate pool 302, and the generated waste water enters the water collecting pool 301 through the inclined guide plate 304. The solid waste materials accumulate on the lifting bottom plate 306. When the solid waste materials are needed, the suspension ropes 307 can be used in cooperation with external hoisting equipment to take out the solid waste materials.

[0031] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A goaf filling device, comprising a main body (1), characterized in that: The main body mechanism (1) comprises three bases (11), a delivery pump (12) is fixedly mounted on the upper surface of each base (11), a material box (13) is fixedly mounted on the upper surface of each delivery pump (12), the interior of each delivery pump (12) is fixedly connected to a discharge pipe (14), and a delivery recovery mechanism (2) is commonly arranged on the outer sides of the three discharge pipes (14); The conveying and recycling mechanism (2) comprises a multi-channel conveying unit (21), the multi-channel conveying unit (21) is located outside the discharge pipe (14), and the multi-channel conveying unit (21) is used to control the conveying and discharge positions between different materials; The transport recovery mechanism (2) further comprises a material recovery unit (22), wherein the material recovery unit (22) is located below the multi-channel transport unit (21), and the material recovery unit (22) is used to clean the transport pipeline and recover waste generated by the cleaning; A material separation and collection mechanism (3) is provided below the material recovery unit (22), the material separation and collection mechanism (3) being located outside the delivery pump (12), and the material separation and collection mechanism (3) being used to separately collect the recovered waste materials.

2. A goaf filling device according to claim 1, characterized in that: The multi-channel transport unit (21) comprises a four-way pipe (2101), three ends of which are fixedly connected to the inside of a discharge pipe (14), the other end of which is fixedly connected to a transport pipe (2109), the outer wall of which is fixedly connected to a mounting pipe (2110), the inner wall of which is fixedly mounted a telescopic rod (2111), and the telescopic rod (2111) is fixedly connected to the inner wall of the mounting pipe (2110). 1) is fixedly installed with a connecting rod (2112) at the telescopic end, and a discharge plug (2113) is fixedly installed at the bottom end of the connecting rod (2112). The outer wall of the conveying pipe (2109) is fixedly connected with a discharge pipe (2114), and the inner wall of the discharge pipe (2114) is in contact with the outer surface of the discharge plug (2113). The interior of the four-way pipe (2101) is fixedly connected with three control pipes (2102). The four-way pipe (2101) is fixedly connected with the three control pipes (2102). 01) is fixedly mounted with a bracket (2103) on its outer surface, and three single-axis cylinders (2108) are fixedly mounted on the inner top wall of the bracket (2103), and the telescopic end of each single-axis cylinder (2108) is in contact with the top of the bracket (2103), and a fixing plate (2104) is fixedly mounted on the telescopic end of each single-axis cylinder (2108), and a sliding rod (2105) is fixedly mounted on the bottom surface of each fixing plate (2104). Each of the sliding rods (2105) slides inside the bracket (2103), and a sealing block (2107) is fixedly installed at the bottom end of each of the sliding rods (2105). The outer surface of each of the sealing blocks (2107) contacts the inner wall of the control material tube (2102), and a material baffle plate (2106) is fixedly installed on the bottom surface of each of the sealing blocks (2107). Each of the material baffle plates (2106) is located inside the four-way tube (2101).

3. A goaf filling device according to claim 2, characterized in that: The material recovery unit (22) comprises a recovery material pipe (2201), the inner wall of the recovery material pipe (2201) is fixedly connected to the outer surface of the feed pipe (2109), a feed chamber (2202) is provided inside the recovery material pipe (2201), a plurality of identical driven blades (2203) are arranged inside the feed chamber (2202), and the plurality of driven blades (2203) are symmetrically arranged, wherein the outer surfaces of two driven blades (2203) are aligned with the inner wall of the recovery material pipe (2201). The feeding cavity (2202) is rotatably connected, and a plurality of identical active blades (2204) are arranged inside the feeding cavity (2202), and each of the active blades (2204) is located between the driven blades (2203). A support shaft (2208) is fixedly installed at the rear end of one of the active blades (2204). A first motor (2205) is fixedly installed on a side of the recovery pipe (2201) close to the four-way pipe (2101). The output end of the first motor (2205) and the outer end of the support shaft (2208) are connected to each other. The surfaces of the two support shafts (2208) are fixedly mounted with a first pulley (2209), the outer surfaces of the two first pulleys (2209) are commonly connected to a first synchronous belt (2210), a second pulley (2207) is fixedly mounted on the front end of the support shaft (2208), the outer surface of the second pulley (2207) is connected to two second synchronous belts (2212), the inner ring of each second synchronous belt (2212) is connected to a third pulley (2211), and the inner wall of each third pulley (2211) is The outer surface of the driven blade (2203) is fixedly connected to the interior of the feed cavity (2202), and the interior of the inclined feed pipe (2214) is fixedly connected to the interior of the discharge pipe (2114). A second motor (2213) is fixedly installed at one end of the inclined feed pipe (2214), and a feeding blade (2215) is fixedly installed at the output end of the second motor (2213), and the top end of the feeding blade (2215) is located inside the feed cavity (2202).

4. A goaf filling device according to claim 3, characterized in that: A first coupling (2206) is commonly and fixedly mounted on the outer surfaces of every two of the driven blades (2203), and each driven blade (2203) located at the front end and the rear end has only one first coupling (2206).

5. The goaf filling device according to claim 3, characterized in that: A second coupling (2216) is commonly and fixedly mounted on the outer surfaces of every two active blades (2204), and each active blade (2204) located at the front end and the rear end has only one second coupling (2216).

6. The goaf filling device according to claim 3, characterized in that: The material distribution and collection mechanism (3) comprises a water collection pool (301), the water collection pool (301) is located below the recovery pipe (2201), an inclined guide plate (304) is fixedly mounted on the right side of the water collection pool (301), a collection pool (302) is fixedly mounted on the right side of the inclined guide plate (304), two filter screens (303) are fixedly mounted on the inner wall of the inclined guide plate (304), and a discharge pipe (309) is fixedly connected to the inside of the recovery pipe (2201), and the discharge pipe (309) is located directly above the filter screen (303).

7. A goaf filling device according to claim 6, characterized in that: A lifting bottom plate (306) is arranged inside the collecting pool (302), and the upper surface of the lifting bottom plate (306) is inclined from left to right.

8. The goaf filling device according to claim 7, characterized in that: Two groups of hanging plates (308) are fixedly mounted on the upper surface of the lifting base plate (306), and the two groups of hanging plates (308) are respectively located at the four corners of the top of the lifting base plate (306).

9. A goaf filling device according to claim 8, characterized in that: Two groups of suspension ropes (307) are arranged inside the aggregate pool (302), and each group of suspension ropes (307) is fixedly mounted on the inner wall of the suspension plate (308).

10. A goaf filling device according to claim 9, characterized in that: Two groups of guide blocks (305) are fixedly mounted on the upper surface of the aggregate pool (302), and the inner wall of each group of guide blocks (305) is in contact with the outer surface of the suspension rope (307).

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