A concrete preparation device for gob-side tunnel retaining and its use method

Abstract

The present invention relates to the technical field of concrete preparation, and specifically to a concrete preparation device for gob-side tunnel retention and a method of using the same. The present invention comprises a base, a mixing drum is rotatably mounted on the top of the base, and a spiral plate and a scraper for stirring are arranged inside the mixing drum. The present invention sprays water flow by atomization through a first nozzle, which can, on the one hand, reduce dust on the gravel ash caused by friction between the gravels in the filter box, and on the other hand, can also wet and scrub the gravels. Secondly, after the atomized water flow drips onto the inclined plate and is collected, it can also flush the muddy water mixed with gravel ash into the discharge pipe along the guide groove, and then the water flow passes through the discharge pipe and falls into the collecting tank, which can prevent the gravel ash from spreading.

Description

Technical Field

[0001] The invention relates to the field of concrete preparation, and in particular to a concrete preparation device for gob-side tunnel retaining and a use method thereof. Background Art

[0002] Gob-side lane retention is to maintain the original mining lane along the edge of the gob after the coal mining face. It is to recover the protective coal pillars left in the traditional mining method. When leaving the coal pillars, in order to ensure the stability of the coal pillars, they are often poured by using concrete.

[0003] For example: In the patent with application number 202121837464.X, a stirring equipment for preparing high-water filling materials along the goaf is disclosed, including a tank body, and a motor is fixedly connected to the top of the tank body, which has the advantages of improving stirring efficiency and strong practicality.

[0004] However, the mixing device in "202121837464.X" still has certain defects when in use. There is a disadvantage that dust cannot be reduced during the preparation of concrete. When preparing concrete, in order to ensure that there are no impurities in the concrete, the gravel is usually cleaned, which often leads to the loss of gravel ash attached to the surface of the gravel, resulting in waste of resources. Secondly, after the concrete is mixed, there is often a situation where the concrete cannot be fully discharged from the mixing device, which easily causes the concrete to condense inside the device. Summary of the invention

[0005] The object of the present invention is to provide a concrete preparation device for gob-side tunnel retaining and a method of using the same, so as to solve the problems raised in the above-mentioned background technology.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A concrete preparation device for retaining tunnels along the goaf comprises a base, a mixing drum is rotatably mounted on the top of the base, a spiral plate and a scraper for stirring are arranged inside the mixing drum, a filter box for screening stones is arranged above the mixing drum, a sieve ring is rotatably mounted inside the filter box, the sieve ring is connected to the mixing drum, an inclined plate for drainage is slidably mounted below the sieve ring, a first annular cavity and a second annular cavity for spraying dust reduction are respectively arranged on the top of the filter box and the mixing drum, a water tank is arranged on the side of the filter box, and the water tank is connected to the first annular cavity and the second annular cavity.

[0008] Preferably, support rods are fixedly connected at the four corners of the top of the base, and one end of the support rod away from the base is fixedly connected to the wall panels at the four corners of the bottom of the top plate. A rotating groove is opened at the center of the top plate, and a rotating ring is fixedly connected to the top side of the mixing drum. The rotating ring is rotatably sleeved in the rotating groove. A rectangular groove is opened on the side of the rotating groove, and a servo motor is arranged at the bottom center of the rectangular groove. The servo motor is fixedly connected to the bottom wall panel of the top plate, and the output shaft of the servo motor is fixedly connected to the driving shaft, which passes through the top plate, and both ends of the driving shaft are respectively connected to the mixing drum and the sieve ring for transmission.

[0009] Preferably, a gear ring is fixedly connected to the outer side of the rotating ring, and a one-way bevel gear and a driving gear are fixedly connected to both ends of the driving shaft respectively. The driving gear is rotatably installed in the rectangular groove through the driving shaft, and the driving gear is meshingly connected to the gear ring, and the one-way bevel gear is meshingly connected to the driving bevel gear. The driving bevel gear is rotatably connected to one side of the filter box, and the driving bevel gear is fixedly connected to the center of one side of the sieve ring. The sieve ring is rotatably connected in the filter box, and the rotation centerline of the sieve ring and the rotation centerline of the driving shaft are perpendicular to each other.

[0010] Preferably, a fan-shaped groove is provided on one side of the sieve ring, an arc-shaped door panel is hinged in the fan-shaped groove, and a plurality of sieve holes are provided on the arc-shaped door panel and the sieve ring. A rotating table is fixedly connected to the end of the driving shaft away from the servo motor, and a plurality of first clips are fixedly connected to the outer side of the rotating table. The rotating table is rotatably sleeved in the one-way bevel gear, and a "T"-shaped rotating groove is provided inside the one-way bevel gear. The rotating table is rotatably sleeved in the rotating groove, and a plurality of second clips are fixedly connected to the inner wall of the rotating groove, and the plurality of second clips are movably clamped with the plurality of first clips.

[0011] Preferably, the top of the filter box is hinged with a cover plate for sealing, and a first annular cavity is opened on the top inner wall of the filter box, and the first annular cavity is located between the cover plate and the sieve ring. Bevel grooves are opened on the two side wall panels at the bottom of the filter box, and a rectangular ring is fixedly connected to the bottom of the filter box. The rectangular ring is connected to the filter box, and the bottom of the bevel groove faces the rectangular ring. An end of the rectangular ring away from the filter box is fixedly connected with a ring plate, and the ring plate is sealed on the top of the mixing drum. The ring plate is rotatably sleeved with the mixing drum, and pillars are fixedly connected at the four corners of the bottom of the filter box, and the end of the pillar away from the filter box is fixedly connected to the top plate.

[0012] Preferably, an "L"-shaped discharge pipe is fixedly connected to the side of the filter box away from the driving shaft, an inclined slot is provided at the bottom of the filter box, an inclined plate is slidably connected in the inclined slot, the inclined slot is communicated with the discharge pipe, a guide slot for discharging is provided on the top of the inclined plate, the inclined plate is movably received in the tube wall at one end of the discharge pipe close to the filter box, a placing table is fixedly connected to the side of the base, a collecting trough is placed on the top of the placing table, and the collecting trough is located directly below the vertical end of the discharge pipe.

[0013] Preferably, a second ring cavity is provided on the top of the ring plate, and a plurality of second nozzles are connected to the bottom of the second ring cavity, and a plurality of first nozzles are connected to the first ring cavity, and the plurality of first nozzles are arranged on the top inner wall plate of the filter box, and a water outlet pipe is connected to the side of the first ring cavity, and a water pump is connected to the end of the water outlet pipe away from the first ring cavity, and the water pump is arranged at the bottom of the water tank, and the water tank is fixedly connected to the top wall plate on one side of the top plate, and a built-in pipe is connected to the top of the second ring cavity, and the built-in pipe is connected to one end of the water outlet pipe close to the first ring cavity, and solenoid valves are respectively arranged at the connection points between the water outlet pipe and the first ring cavity and the built-in pipe, and the solenoid valve is adapted to the servo motor.

[0014] Preferably, a discharge trough is provided at the top center of the base, a fixed column is fixedly connected to the top of the discharge trough, a conical platform is fixedly connected to the end of the fixed column away from the discharge trough, the conical platform is located directly below the rectangular ring, a butterfly valve is provided at the bottom of the mixing drum, the fixed column passes through the center wall panel of the butterfly valve, a plurality of spiral plates are fixedly connected to the middle section of the fixed column, and the plurality of spiral plates are abutted against the inner bottom wall panel of the mixing drum.

[0015] Preferably, a scraper is fixedly connected to the top of one end of the spiral plate away from the fixed column, the scraper abuts against the inner wall plate of the mixing drum, a plurality of stirring rods are fixedly connected to the side of the fixed column, the plurality of stirring rods are located between the conical platform and the spiral plate, an annular groove is opened on the top wall plate inside the mixing drum, a limiting ring is rotatably sleeved in the annular groove, and the end of the scraper away from the spiral plate is fixedly connected to the bottom wall plate of the limiting ring.

[0016] A method for using a concrete preparation device for gob-side tunnel retaining, the method comprising the following steps:

[0017] Step 1: Open the cover plate and the curved door plate, then add stones into the sieve ring, close the curved door plate and the cover plate after adding stones into the sieve ring, control the servo motor to rotate, and the servo motor drives the sieve ring to rotate;

[0018] Step 2: During the rotation of the sieve ring, the solenoid valve at the connection point between the first ring cavity and the water outlet pipe is opened, and then the water pump is turned on. The opening of the water pump causes the first nozzle to spray water in the filter box to reduce dust, and the stains washed down by the water flow will enter the collection tank through the inclined plate and the discharge pipe;

[0019] Step 3: After the stones in the sieve ring are cleaned, slide the inclined plate into the discharge pipe, and open the arc door plate and cover plate at the same time, so that the stones in the sieve ring fall into the mixing drum, and then add cement and sand for preparing concrete into the mixing drum through the filter box. After the addition is completed, the servo motor is controlled to rotate in the opposite direction;

[0020] Step 4: The servo motor rotates in the reverse direction to drive the mixing drum to perform mixing. When the servo motor rotates in the reverse direction, the solenoid valve at the connection between the built-in pipe and the water outlet pipe opens, and the water pump performs dust reduction work on the inside of the mixing drum through the second nozzle.

[0021] Beneficial effects of the present invention:

[0022] 1. The present invention sprays water flow by atomization through the first nozzle, which can reduce dust on the gravel ash caused by friction between the stones in the filter box on the one hand, and can also wet and scrub the stones on the other hand. Secondly, after the atomized water flow drops on the inclined plate and gathers, it can also flush the muddy water mixed with gravel ash into the discharge pipe along the guide groove, and then make the water flow fall into the collection tank through the discharge pipe, which can prevent the diffusion of gravel ash and reduce the diffusion of dust, providing a relatively low-dust environment for technicians and ensuring the health of technicians. The gravel ash can be processed in a centralized manner after being collected in the collection tank. The centralized processed gravel ash can also be used to lay temporary ground when the coal mine builds the goaf-side tunnel, so that the gravel ash can be effectively utilized, effectively improving the utilization rate of the stones.

[0023] 2. The present invention uses the second nozzle to atomize and spray the water flow, which can reduce dust during the mixing process of concrete. During the mixing process of concrete, the mixing drum will cause the mixing rod and the scraper to push the gravel, cement and sand away from the fixed column. At this time, the gravel, cement and sand are effectively mixed, thereby effectively preparing the concrete. The relative movement between the scraper and the mixing drum can scrape off the material on the inner wall of the mixing drum, preventing the mixture of cement, sand and gravel from adhering to the inner wall of the mixing drum.

[0024] 3. The present invention is provided with a servo motor. When the servo motor rotates forward, it will drive the mixing drum to rotate through the driving gear. At this time, the rotation direction of the mixing drum is opposite to the rotation direction when mixing gravel, cement and sand. The spiral plate will push the concrete to move in the direction close to the fixed column, and then open the butterfly valve. At this time, the concrete will fall along the fixed column. The fixed column can also play a drainage effect in the process of concrete discharge, and promote the discharge of concrete together with the spiral plate. The setting of the scraper and the spiral plate can make the concrete discharged from the mixing drum more thorough and clean when the device discharges concrete, thereby avoiding the situation where the concrete is condensed in the mixing drum due to insufficient discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a rear view of the overall structure of the present invention;

[0028] Figure 3 It is a schematic cross-sectional view of the structure of the base of the present invention;

[0029] Figure 4 The present invention Figure 3 An enlarged schematic diagram of the structure of section A is shown;

[0030] Figure 5 It is a schematic cross-sectional view of the structure of the fixing column of the present invention;

[0031] Figure 6 It is a schematic diagram of the overall structure of the sieve ring of the present invention;

[0032] Figure 7 It is a schematic diagram of the connection structure between the driving gear and the gear ring of the present invention;

[0033] Figure 8 It is a schematic diagram of the installation structure of the scraper of the present invention;

[0034] Fig. 9 It is a schematic cross-sectional view of the structure of the one-way bevel gear of the present invention;

[0035] Fig.10 It is a schematic diagram of the overall structure of the inclined plate of the present invention;

[0036] The reference numerals in the figure are as follows: 1, base; 2, mixing drum; 3, discharge trough; 4, servo motor; 5, top plate; 6, filter box; 7, water tank; 8, collecting trough; 9, discharge pipe; 10, cover plate; 11, ring plate; 12, pillar; 13, one-way bevel gear; 14, driving bevel gear; 15, driving shaft; 16, fixed column; 17, water outlet pipe; 18, driving gear; 19, rotating ring; 20, first ring cavity; 21, The first nozzle; 22, rectangular ring; 23, second ring cavity; 24, second nozzle; 25, limit ring; 26, stirring rod; 27, spiral plate; 28, scraper; 29, butterfly valve; 30, water pump; 31, arc door plate; 32, sieve ring; 33, inclined plate; 34, sieve hole; 35, gear ring; 36, conical table; 37, rotating round table; 38, first clamping strip; 39, second clamping strip; 40, guide groove; 41, built-in pipe. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] like Figure 1-10 As shown, a concrete preparation device for gob-side tunnel retention includes a base 1, a mixing drum 2 is rotatably mounted on the top of the base 1, a spiral plate 27 and a scraper 28 for mixing are arranged inside the mixing drum 2, a filter box 6 for screening stones is arranged above the mixing drum 2, a sieve ring 32 is rotatably mounted inside the filter box 6, the sieve ring 32 is connected to the mixing drum 2, an inclined plate 33 for drainage is slidably mounted below the sieve ring 32, a first annular cavity 20 and a second annular cavity 23 for spraying dust are arranged on the top of the filter box 6 and the mixing drum 2, respectively, a water tank 7 is arranged on the side of the filter box 6, and the water tank 7 is connected to the first annular cavity 20 and the second annular cavity 23. A plug for adding water is arranged on the top of the water tank 7.

[0039] As a technical optimization solution of the present invention, Figure 1-3 and Figure 5 As shown, the four corners of the top of the base 1 are fixedly connected with support rods, and the end of the support rod away from the base 1 is fixedly connected to the wall panels at the four corners of the bottom of the top plate 5. A rotating groove is provided at the center of the top plate 5. A rotating ring 19 is fixedly connected to the top side of the mixing drum 2. The rotating ring 19 is rotatably sleeved in the rotating groove. A rectangular groove is provided on the side of the rotating groove. A servo motor 4 is provided at the bottom center of the rectangular groove. The servo motor 4 is fixedly connected to the bottom wall panel of the top plate 5. The output shaft of the servo motor 4 is fixedly connected with a driving shaft 15. The driving shaft 15 passes through the top plate 5. The two ends of the driving shaft 15 are respectively connected to the mixing drum 2 and the sieve ring 32. The driving shaft 15 passes through the top plate 5 and is rotatably sleeved in the top plate 5.

[0040] As a technical optimization solution of the present invention, Figure 1-4 and Figure 7 As shown, the outer side of the rotating ring 19 is fixedly connected with a gear ring 35, and the two ends of the driving shaft 15 are respectively fixedly connected with a one-way bevel gear 13 and a driving gear 18, and the driving gear 18 is rotatably installed in the rectangular groove through the driving shaft 15, and the driving gear 18 is meshed with the gear ring 35, and the one-way bevel gear 13 is meshed with a driving bevel gear 14, and the driving bevel gear 14 is rotatably connected to one side of the filter box 6, and the driving bevel gear 14 is fixedly connected to the center of one side of the sieve ring 32, and the sieve ring 32 is rotatably connected in the filter box 6, and the rotation center line of the sieve ring 32 is perpendicular to the rotation center line of the driving shaft 15. A plurality of rollers are arranged at the bottom of the rotating ring 19, and the rollers are used to reduce the friction between the rotating ring 19 and the top plate 5.

[0041] As a technical optimization solution of the present invention, Figure 1-5 and Fig. 9 As shown, a fan-shaped groove is provided on one side of the sieve ring 32, and an arc-shaped door panel 31 is hinged in the fan-shaped groove. A plurality of sieve holes 34 are provided on the arc-shaped door panel 31 and the sieve ring 32. A rotating table 37 is fixedly connected to the end of the driving shaft 15 away from the servo motor 4, and a plurality of first clamping strips 38 are fixedly connected to the outer side of the rotating table 37. The rotating table 37 is rotatably sleeved in the one-way bevel gear 13. A "T"-shaped rotating groove is provided inside the one-way bevel gear 13. The rotating table 37 is rotatably sleeved in the rotating groove. A plurality of second clamping strips 39 are fixedly connected to the inner wall of the rotating groove. The plurality of second clamping strips 39 are movably clamped with the plurality of first clamping strips 38. The provision of the first clamping strip 38 and the second clamping strip 39 can effectively realize the one-way rotation of the one-way bevel gear 13.

[0042] As a technical optimization solution of the present invention, Figure 1-5 As shown, the top of the filter box 6 is hinged with a cover plate 10 for sealing, the first annular cavity 20 is provided on the top inner wall of the filter box 6, the first annular cavity 20 is located between the cover plate 10 and the sieve ring 32, the bottom two side wall plates of the filter box 6 are provided with chute, the bottom of the filter box 6 is fixedly connected with a rectangular ring 22, the rectangular ring 22 is communicated with the filter box 6, the bottom of the chute faces the rectangular ring 22, the end of the rectangular ring 22 away from the filter box 6 is fixedly connected with a ring plate 11, the ring plate 11 is sealed on the top of the mixing drum 2, the ring plate 11 is rotatably sleeved with the mixing drum 2, the four corners of the bottom of the filter box 6 are fixedly connected with pillars 12, and the end of the pillar 12 away from the filter box 6 is fixedly connected to the top plate 5. The bottom of the filter box 6 is provided with a rectangular through hole for discharging, the rectangular through hole is communicated with the rectangular ring 22, and the end of the rectangular ring 22 away from the rectangular through hole is communicated with the internal chamber of the mixing drum 2.

[0043] As a technical optimization solution of the present invention, Figure 1-5 and Fig.10 As shown, a side of the filter box 6 away from the drive shaft 15 is fixedly connected with an "L"-shaped discharge pipe 9, an inclined chute is provided at the bottom of the filter box 6, an inclined plate 33 is slidably connected in the inclined chute, the inclined chute is connected to the discharge pipe 9, a guide groove 40 for discharging is provided on the top of the inclined plate 33, and the inclined plate 33 is movably stored in the pipe wall of one end of the discharge pipe 9 close to the filter box 6, a placing table is fixedly connected to the side of the base 1, a collecting trough 8 is placed on the top of the placing table, and the collecting trough 8 is located directly below the vertical end of the discharge pipe 9. The setting of the collecting trough 8 can effectively realize the collection of gravel ash, facilitate the utilization of gravel ash, and improve the utilization rate of gravel.

[0044] As a technical optimization solution of the present invention, Figure 1-5As shown, a second annular cavity 23 is provided on the top of the annular plate 11, and a plurality of second nozzles 24 are connected to the bottom of the second annular cavity 23, and a plurality of first nozzles 21 are connected to the first annular cavity 20, and the plurality of first nozzles 21 are arranged on the top inner wall plate of the filter box 6, and a water outlet pipe 17 is connected to the side of the first annular cavity 20, and an end of the water outlet pipe 17 away from the first annular cavity 20 is connected to a water pump 30, and the water pump 30 is arranged at the bottom of the water tank 7, and the water tank 7 is fixedly connected to the top wall plate on one side of the top plate 5, and a built-in pipe 41 is connected to the top of the second annular cavity 23, and the built-in pipe 41 is connected to an end of the water outlet pipe 17 close to the first annular cavity 20, and electromagnetic valves are respectively arranged at the connection points between the water outlet pipe 17 and the first annular cavity 20 and the built-in pipe 41, and the electromagnetic valve is adapted to the servo motor 4. When the servo motor 4 rotates forward, the solenoid valve at the connection between the water outlet pipe 17 and the first annular cavity 20 opens, and the solenoid valve at the connection between the water outlet pipe 17 and the built-in tube 41 is closed. When the servo motor 4 rotates reversely, the solenoid valve at the connection between the water outlet pipe 17 and the first annular cavity 20 is closed, and the solenoid valve at the connection between the water outlet pipe 17 and the built-in tube 41 is opened.

[0045] As a technical optimization solution of the present invention, Figure 1-5 and Figure 8 As shown, a discharge trough 3 is provided at the top center of the base 1, a fixed column 16 is fixedly connected to the top of the discharge trough 3, a conical platform 36 is fixedly connected to the end of the fixed column 16 away from the discharge trough 3, and the conical platform 36 is located directly below the rectangular ring 22. A butterfly valve 29 is provided at the bottom of the mixing drum 2, and the fixed column 16 penetrates the central wall plate of the butterfly valve 29. A plurality of spiral plates 27 are fixedly connected to the middle section of the fixed column 16, and the plurality of spiral plates 27 abut against the inner bottom wall plate of the mixing drum 2. A sealing ring is provided at the sleeve joint between the butterfly valve 29 and the fixed column 16. The setting of the sealing ring is a prior art, which is commonly used in the sealing of the piston cylinder of an automobile engine, and will not be disclosed in detail here.

[0046] As a technical optimization solution of the present invention, Figure 1-5 and Figure 8 As shown, a scraper 28 is fixedly connected to the top of one end of the spiral plate 27 away from the fixed column 16, and the scraper 28 abuts against the inner wall plate of the mixing drum 2. A plurality of stirring rods 26 are fixedly connected to the side of the fixed column 16, and the plurality of stirring rods 26 are located between the conical platform 36 and the spiral plate 27. An annular groove is provided on the inner top wall plate of the mixing drum 2, and a limit ring 25 is rotatably sleeved in the annular groove. The end of the scraper 28 away from the spiral plate 27 is fixedly connected to the bottom wall plate of the limit ring 25. The arrangement of the scraper 28 and the spiral plate 27 enables the concrete to be discharged more thoroughly and cleanly from the mixing drum 2 when the device discharges concrete.

[0047] A method for using a concrete preparation device for gob-side tunnel retention, the method comprising the following steps:

[0048] Step 1: Open the cover plate 10 and the curved door plate 31, then add stones into the sieve ring 32, close the curved door plate 31 and the cover plate 10 after adding stones into the sieve ring 32, control the servo motor 4 to rotate, and the servo motor 4 drives the sieve ring 32 to rotate;

[0049] Step 2: During the rotation of the sieve ring 32, the electromagnetic valve at the connection between the first ring cavity 20 and the water outlet pipe 17 is opened, and then the water pump 30 is turned on. The opening of the water pump 30 enables the first nozzle 21 to spray water in the filter box 6 to reduce dust, and the stains washed down by the water flow will enter the collection tank 8 through the inclined plate 33 and the discharge pipe 9;

[0050] Step 3: After the stones in the sieve ring 32 are cleaned, the inclined plate 33 is slid into the discharge pipe 9, and the arc door plate 31 and the cover plate 10 are opened at the same time, so that the stones in the sieve ring 32 fall into the mixing drum 2, and then cement and sand for preparing concrete are added into the mixing drum 2 through the filter box 6. After the addition is completed, the servo motor 4 is controlled to rotate in the opposite direction;

[0051] Step 4: The servo motor 4 rotates in the reverse direction to drive the mixing drum 2 to perform mixing. When the servo motor 4 rotates in the reverse direction, the solenoid valve at the connection between the built-in pipe 41 and the water outlet pipe 17 is opened, and the water pump 30 performs dust reduction work on the inside of the mixing drum 2 through the second nozzle 24 .

[0052] When the present invention is in use, the cover plate 10 and the arc door plate 31 are opened, and then stones are added into the sieve ring 32. After the stones are added into the sieve ring 32, the arc door plate 31 and the cover plate 10 are closed, and the servo motor 4 is controlled to rotate, and the servo motor 4 drives the sieve ring 32 to rotate. When the servo motor 4 rotates forward, it drives the one-way bevel gear 13 to rotate through the first clamping strip 38 and the second clamping strip 39, and the rotation of the one-way bevel gear 13 drives the driving bevel gear 14 to rotate. After the driving bevel gear 14 rotates, it drives the sieve ring 32 to rotate. The rotation of the sieve ring 32 causes the stones in the sieve ring 32 to rub against each other. Under the mutual friction, the stones will cause the stone dust adhered to the surface to fall off, and then fall on the inclined plate 33 through the sieve hole 34.

[0053] During the rotation of the sieve ring 32, the solenoid valve at the connection between the first ring cavity 20 and the water outlet pipe 17 is opened, and the solenoid valve at the connection between the water outlet pipe 17 and the built-in pipe 41 is closed. Then the water pump 30 is turned on. The opening of the water pump 30 enables the first nozzle 21 to spray water to reduce dust in the filter box 6, and the stains washed down by the water flow will enter the collection tank 8 through the inclined plate 33 and the discharge pipe 9. The water pump 30 will draw water from the water tank 7. After passing through the water pump 30, the water flows into the water outlet pipe 17, and then enters the first annular cavity 20 through the water outlet pipe 17. After the water flows are gathered in the first annular cavity 20, they will be atomized and sprayed through the first nozzle 21. On the one hand, it can reduce dust on the gravel ash caused by the friction between the gravels in the filter box 6, and on the other hand, it can also play a role in moistening and scrubbing the gravel. Secondly, after the atomized water flow drops on the inclined plate 33 and is gathered, it can also flush the muddy water mixed with gravel ash into the discharge pipe 9 along the guide groove 40, and then make the water flow pass through the discharge pipe 9 and fall into the collecting tank 8, which can prevent the diffusion of gravel ash and reduce the diffusion of dust, provide a relatively low-dust environment for technicians, and ensure the health of technicians. The gravel ash can be processed centrally after being collected by the collecting trough 8. The centrally processed gravel ash can also be used to lay temporary ground when the coal mine builds the goaf-side tunnel, so that the gravel ash can be effectively utilized, effectively improving the utilization rate of the gravel.

[0054] After the stones in the sieve ring 32 are cleaned, the inclined plate 33 is slid into the discharge pipe 9, and the arc door plate 31 and the cover plate 10 are opened at the same time. After the arc door plate 31 is opened, the stones in the sieve ring 32 will fall into the filter box 6, and then enter the mixing drum 2 through the rectangular ring 22. Then, cement and sand for preparing concrete are added to the mixing drum 2 through the filter box 6. After the addition is completed, the cover plate 10 is closed, and finally the servo motor 4 is controlled to rotate in the opposite direction. After the servo motor 4 rotates in the opposite direction, when the servo motor 4 drives the drive shaft 15 to rotate, the drive shaft 15 will drive the rotating round table 37 to rotate, and the rotating round table 37 will drive the first clamping bar 38 to rotate. At this time, the first clamping bar 38 is Fig. 9 The first clamping strip 38 and the second clamping strip 39 will not be engaged with each other at this time. Since the one-way bevel gear 13 is subject to the resistance generated by the meshing connection of the driving bevel gear 14, when the rotating table 37 rotates at this time, it will not drive the one-way bevel gear 13 to rotate, and the screen ring 32 will not rotate at this time.

[0055] The servo motor 4 rotates in the reverse direction to drive the mixing drum 2 to perform mixing. When the servo motor 4 rotates in the reverse direction, the electromagnetic valve at the connection between the built-in pipe 41 and the water outlet pipe 17 is opened, and the electromagnetic valve between the water outlet pipe 17 and the first annular cavity 20 is closed, and the water pump 30 performs dust reduction work on the inside of the mixing drum 2 through the second nozzle 24. When the servo motor 4 rotates in the reverse direction, it will not drive the one-way bevel gear 13 to rotate, but it will drive the driving gear 18 to rotate, and then the driving gear 18 drives the rotating ring 19 to rotate through the meshing with the gear ring 35, and the rotation of the rotating ring 19 drives the mixing drum 2 to rotate. When the mixing drum 2 rotates, since the scraper 28 and the stirring rod 26 are fixed, when the mixing drum 2 rotates, the rotation of the mixing drum 2 and the scraper 28 and the stirring rod 26 will rotate relative to each other, and the rotation of the mixing drum 2 will cause the stirring rod 26 and the scraper 28 to push the gravel, cement and sand away from the fixed column 16, and at this time, the gravel, cement and sand are effectively mixed, so that the concrete is effectively prepared. During this process, the relative movement between the scraper 28 and the mixing drum 2 can scrape off the material on the inner wall of the mixing drum 2 to prevent the mixture of cement, sand and gravel from adhering to the inner wall of the mixing drum 2 .

[0056] After the concrete is mixed, the cover plate 10 and the arc door plate 31 are opened, and then stones are put into the sieve ring 32. After the stones are put in, the arc door plate 31 and the cover plate 10 are closed. After closing the cover plate 10, the inclined plate 33 is controlled to move from the discharge pipe 9 to the filter box 6. At this time, the inclined plate 33 is blocked between the filter box 6 and the rectangular ring 22, and then the servo motor 4 is controlled to rotate forward. At this time, the servo motor 4 will drive the driving bevel gear 14 through the one-way bevel gear 13 to clean the stones in the sieve ring 32. When the servo motor 4 rotates forward, it will also drive the mixing drum 2 to rotate through the driving gear 18. At this time, the rotation direction of the mixing drum 2 is opposite to the rotation direction when mixing gravel, cement and sand. The spiral plate 27 will push the concrete to move toward the direction close to the fixed column 16, and then open the butterfly valve 29. At this time, the concrete will fall along the fixed column 16. The fixed column 16 can also play a drainage effect during the discharge of concrete, and together with the spiral plate 27, promote the discharge of concrete. After the concrete falls into the discharge chute 3, it will be discharged along the discharge chute 3. At this time, the technicians can collect the concrete and put it into use.

[0057] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A concrete preparation device for gob-side tunnel retaining, comprising a base (1), characterized in that: A mixing drum (2) is rotatably mounted above the base (1), a spiral plate (27) and a scraper (28) for stirring are arranged inside the mixing drum (2), a filter box (6) for screening stones is arranged above the mixing drum (2), a sieve ring (32) is rotatably mounted inside the filter box (6), the sieve ring (32) is connected to the mixing drum (2), an inclined plate (33) for drainage is slidably mounted below the sieve ring (32), a first annular cavity (20) and a second annular cavity (23) for spraying dust are respectively arranged on the top of the filter box (6) and the mixing drum (2), a water tank (7) is arranged on the side of the filter box (6), and the water tank (7) is connected to the first annular cavity (20) and the second annular cavity (23); The four corners of the top of the base (1) are all fixedly connected to support rods, and one end of the support rod away from the base (1) is fixedly connected to the wall panels at the four corners of the bottom of the top plate (5). A rotating groove is provided at the center of the top plate (5). A rotating ring (19) is fixedly connected to the top side of the mixing drum (2). The rotating ring (19) is rotatably sleeved in the rotating groove. A rectangular groove is provided on the side of the rotating groove. A servo motor (4) is arranged at the bottom center of the rectangular groove. The servo motor (4) is fixedly connected to the bottom wall panel of the top plate (5). The output shaft of the servo motor (4) is fixedly connected to a driving shaft (15). The driving shaft (15) passes through the top plate (5). The two ends of the driving shaft (15) are respectively connected to the mixing drum (2) and the sieve ring (32) in a transmission manner. The outer side of the rotating ring (19) is fixedly connected to a gear ring (35), and the two ends of the driving shaft (15) are respectively fixedly connected to a one-way bevel gear (13) and a driving gear (18), the driving gear (18) is rotatably installed in the rectangular groove through the driving shaft (15), the driving gear (18) is meshingly connected with the gear ring (35), the one-way bevel gear (13) is meshingly connected with a driving bevel gear (14), the driving bevel gear (14) is rotatably connected to one side of the filter box (6), the driving bevel gear (14) is fixedly connected to the center of one side of the sieve ring (32), the sieve ring (32) is rotatably connected in the filter box (6), and the rotation center line of the sieve ring (32) and the rotation center line of the driving shaft (15) are perpendicular to each other; A fan-shaped groove is provided on one side of the sieve ring (32), an arc-shaped door panel (31) is hingedly connected in the fan-shaped groove, a plurality of sieve holes (34) are provided on the arc-shaped door panel (31) and the sieve ring (32), a rotating table (37) is fixedly connected to one end of the drive shaft (15) away from the servo motor (4), a plurality of first clamping strips (38) are fixedly connected to the outer side of the rotating table (37), the rotating table (37) is rotatably sleeved in the one-way bevel gear (13), a "T"-shaped rotating groove is provided inside the one-way bevel gear (13), the rotating table (37) is rotatably sleeved in the rotating groove, a plurality of second clamping strips (39) are fixedly connected to the inner wall of the rotating groove, and the plurality of second clamping strips (39) are movably clamped with the plurality of first clamping strips (38); An "L"-shaped discharge pipe (9) is fixedly connected to one side of the filter box (6) away from the drive shaft (15); an inclined chute is provided at the bottom of the filter box (6); an inclined plate (33) is slidably connected in the inclined chute; the inclined chute is communicated with the discharge pipe (9); a guide groove (40) for discharging material is provided at the top of the inclined plate (33); the inclined plate (33) is movably received in the wall of one end of the discharge pipe (9) close to the filter box (6); a placing table is fixedly connected to the side of the base (1); a collecting trough (8) is placed on the top of the placing table; the collecting trough (8) is located directly below the vertical end of the discharge pipe (9).

2. The concrete preparation equipment for gob-side tunnel retaining according to claim 1, characterized in that: The top of the filter box (6) is hingedly connected with a cover plate (10) for sealing. A first annular cavity (20) is provided on the inner wall of the top of the filter box (6). The first annular cavity (20) is located between the cover plate (10) and the sieve ring (32). The bottom side wall plates of the filter box (6) are provided with inclined grooves. The bottom of the filter box (6) is fixedly connected with a rectangular ring (22). The rectangular ring (22) is in communication with the filter box (6). The bottom of the inclined groove faces the rectangular ring (22). An end of the rectangular ring (22) away from the filter box (6) is fixedly connected with a ring plate (11). The ring plate (11) is sealed on the top of the mixing drum (2). The ring plate (11) and the mixing drum (2) are rotatably sleeved. Support pillars (12) are fixedly connected at the four corners of the bottom of the filter box (6). An end of the support pillar (12) away from the filter box (6) is fixedly connected to the top plate (5).

3. The concrete preparation equipment for gob-side tunnel retaining according to claim 2, characterized in that: A second annular cavity (23) is provided at the top of the annular plate (11); a plurality of second nozzles (24) are connected to the bottom of the second annular cavity (23); a plurality of first nozzles (21) are connected to the first annular cavity (20); the plurality of first nozzles (21) are arranged on the top inner wall plate of the filter box (6); a water outlet pipe (17) is connected to the side of the first annular cavity (20); an end of the water outlet pipe (17) away from the first annular cavity (20) is connected to a water pump (30); the water pump (30) is arranged at the bottom of a water tank (7); the water tank (7) is fixedly connected to a top wall plate on one side of the top plate (5); a built-in pipe (41) is connected to the top of the second annular cavity (23); the built-in pipe (41) is connected to an end of the water outlet pipe (17) close to the first annular cavity (20); solenoid valves are provided at the connection points between the water outlet pipe (17) and the first annular cavity (20) and the built-in pipe (41); the solenoid valve is adapted to the servo motor (4).

4. The concrete preparation equipment for gob-side tunnel retaining according to claim 3, characterized in that: A discharge trough (3) is provided at the center of the top of the base (1), a fixed column (16) is fixedly connected to the top of the discharge trough (3), a conical platform (36) is fixedly connected to one end of the fixed column (16) away from the discharge trough (3), and the conical platform (36) is located directly below the rectangular ring (22). A butterfly valve (29) is provided at the bottom of the mixing drum (2), the fixed column (16) passes through the wall plate at the center of the butterfly valve (29), and a plurality of spiral plates (27) are fixedly connected to the middle section of the fixed column (16), and the plurality of spiral plates (27) abut against the inner bottom wall plate of the mixing drum (2).

5. The concrete preparation equipment for gob-side tunnel retaining according to claim 4, characterized in that: A scraper (28) is fixedly connected to the top of one end of the spiral plate (27) away from the fixed column (16), and the scraper (28) abuts against the inner wall plate of the mixing drum (2). A plurality of stirring rods (26) are fixedly connected to the side of the fixed column (16), and the plurality of stirring rods (26) are located between the conical platform (36) and the spiral plate (27). An annular groove is provided on the inner top wall plate of the mixing drum (2), and a limit ring (25) is rotatably sleeved in the annular groove. An end of the scraper (28) away from the spiral plate (27) is fixedly connected to the bottom wall plate of the limit ring (25).

6. A method for using the concrete preparation equipment for gob-side tunnel retaining as claimed in claim 5, characterized in that: The method of use comprises the following steps: Step 1: Open the cover plate (10) and the curved door plate (31), then add stones into the sieve ring (32), close the curved door plate (31) and the cover plate (10) after adding stones into the sieve ring (32), control the servo motor (4) to rotate, and the servo motor (4) drives the sieve ring (32) to rotate; Step 2: During the rotation of the sieve ring (32), the electromagnetic valve at the connection point between the first annular cavity (20) and the water outlet pipe (17) is opened, and then the water pump (30) is turned on. The opening of the water pump (30) causes the first nozzle (21) to spray water in the filter box (6) to reduce dust, and the dirt washed down by the water flow enters the collection tank (8) through the inclined plate (33) and the discharge pipe (9); Step 3: After the stones in the sieve ring (32) are cleaned, the inclined plate (33) is slid into the discharge pipe (9), and the arc-shaped door plate (31) and the cover plate (10) are opened at the same time, so that the stones in the sieve ring (32) fall into the mixing drum (2), and then cement and sand for preparing concrete are added to the mixing drum (2) through the filter box (6). After the addition is completed, the servo motor (4) is controlled to rotate in the opposite direction; Step 4: The servo motor (4) rotates in the reverse direction to drive the mixing drum (2) to perform mixing. When the servo motor (4) rotates in the reverse direction, the solenoid valve at the connection between the built-in pipe (41) and the water outlet pipe (17) is opened, and the water pump (30) performs dust reduction work on the inside of the mixing drum (2) through the second nozzle (24).

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