CN217377693U - Water conservancy river mud resourceful treatment device - Google Patents

Abstract

The utility model relates to a water conservancy river sludge recycling device, which comprises a drying box, a crushing and feeding mechanism and a blowing drying box which are mutually communicated, wherein a material paving conveyor belt is arranged in the drying box, and a first electric heating pipe is arranged at the top end of the inner part of the drying box; be equipped with hot-blast jetting mechanism in the jetting drying cabinet, the gas outlet has been seted up to one side of jetting drying cabinet lower part, gas outlet department is fixed with the filter cloth, install the vibration feeder hopper on the inner wall of jetting drying cabinet, top-down is fixed with the baffling board of a plurality of crisscross settings in proper order on the inner wall of vibration feeder hopper both sides, the inside below of jetting drying cabinet is fixed with connects the hopper, the discharge end of vibration feeder hopper extends to the inside top of connecing the hopper, it has the material receiving pipe to connect hopper bottom intercommunication, the material receiving pipe runs through the bottom of jetting drying cabinet in proper order, the top of stoving case extends to the top of stone conveyer belt feed end. Convenient operation is convenient for realize batch processing, smashes it earlier before carrying out the drying to the mud cake, improves follow-up dry efficiency.

Description

Water conservancy river mud resourceful treatment device

Technical Field

The utility model belongs to the technical field of equipment for sludge treatment, especially, relate to a water conservancy river mud resourceful treatment device.

Background

The sludge deposited at the bottom of the river channel is the main reason for leading the water body to become turbid, black and smelly, and the sludge can also cause the blockage of the river channel and influence the shipping and flood control capability of the river channel. Therefore, the river channel must be periodically subjected to dredging treatment. Because the output of the river sludge is very large, and the sludge contains a large amount of toxic components which are difficult to degrade, such as organic matters, heavy metals, salts, pathogenic microorganisms, parasitic ova and the like besides a large amount of water, if the sludge is directly discharged into the environment, no small pressure is brought to the environmental protection. In order to ensure the harmless treatment of the river sludge, eliminate toxic and harmful substances in the sludge which pollute the environment, recycle iron, calcium, copper, potassium and other elements in the sludge and realize the purpose of recycling the sludge for preparing fertilizer by utilizing the sludge, at present, the following process flow is often adopted to treat the river sludge: removing impurities, fermenting, digesting, and mechanically dewatering to obtain mud cakes without harmful substances, and finally drying the mud cakes to obtain the sludge fertilizer capable of replacing farming fertilizer, so that harmless and recycling treatment of the sludge is realized. The prior art is generally as described in patent document CN210313981U, which discloses a sludge cake drying apparatus for sewage treatment, wherein when in use, a sludge cake is placed in a drying rack, then a driving motor is started to rotate the drying rack, a heating wire is started to heat the heating wire, a fan is started to blow hot air around the heating wire, and the sludge cake on the drying rack in a rotating state is heated and dried by the hot air. Although this kind of drying method can realize the rapid draing to the mud cake surface, the inside evaporation of water of mud cake is comparatively slow, and drying efficiency is low, can not realize the thorough drying to the mud cake, influences the result of use of follow-up mud system fertilizer, needs the manual work to put it in the drying rack in addition, and intensity of labour is big, inconvenient realization batch processing.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a water conservancy river mud resourceful treatment device for there is drying efficiency low, the inconvenient technical problem who realizes batch processing in the sludge drying equipment who is used for mud resourceful treatment among the solution prior art.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the water conservancy river sludge recycling device comprises a horizontally arranged drying box, wherein a door-shaped mounting frame is fixed at the top of the drying box, a paving conveyor belt is horizontally arranged in the drying box along the length direction of the drying box, a first electric heating pipe is arranged at the top end of the drying box, and a discharging pipe which is arranged in a downward inclination manner is communicated with the bottom of the drying box at the discharging end of the paving conveyor belt; a crushing feeding mechanism for crushing mud cakes is fixed at the top of the horizontal part of the door-shaped mounting frame, a blowing drying box is fixed between two vertical parts of the door-shaped mounting frame, the top of the blowing drying box is communicated with the bottom of the crushing feeding mechanism, a hot air blowing mechanism is arranged above the inside of the blowing drying box, one side of the lower part of the blowing drying box is provided with an air outlet, filter cloth is fixed at the air outlet, a mounting ring is fixed on the inner wall of the blowing drying box, a vibration feeding hopper is arranged inside the mounting ring, the vibration feeding hopper is positioned below the hot air blowing mechanism, the periphery of the upper part of the vibration feeding hopper is in flexible connection with the top of the mounting ring through a spring, vibration motors which are symmetrically arranged are fixed on the outer wall of the lower part of the vibration feeding hopper, and a plurality of baffle plates which are arranged in a staggered way are sequentially and fixedly connected on the inner walls of the two sides of the vibration feeding hopper from top to bottom, the baffle plate is arranged in a downward inclined mode, a material receiving hopper is fixed to the lower portion inside the blowing drying box, the discharge end of the vibration feeding hopper extends downwards to the upper portion inside the material receiving hopper, the bottom of the material receiving hopper is communicated with a material receiving pipe, and the material receiving pipe sequentially penetrates through the bottom of the blowing drying box and the top of the drying box and extends to the upper portion of the feeding end of the paving conveying belt.

Preferably, smash feed mechanism including fixing the crushing case at the top of door font mounting bracket horizontal part, smash the slope of case and set up, the one end intercommunication at crushing roof portion has the magazine of vertical setting, the other end intercommunication of smashing the bottom of the case portion has the feeding pipe of vertical setting, feeding pipe runs through the top of door font mounting bracket horizontal part and is linked together with jetting drying cabinet is inside, install first driving motor on the lateral wall of crushing case one end, first driving motor's output shaft is connected with the pivot of extending along the length direction who smashes the case through shaft coupling transmission, the pivot deviates from the one end of first driving motor and extends to crushing incasement portion and be connected with the lateral wall rotation of crushing case through the bearing, the periphery of pivot is equipped with spiral cutting blade along its fixed cover of length direction, all be fixed with second electric heating pipe on two upper and lower inner walls of crushing case, second electric heating pipe extends along the length direction who smashes the case.

Preferably, a grinding and crushing box is fixed at one end of the top of the door-shaped mounting frame, the bottom of the grinding and crushing box is communicated with a connecting pipe which is vertically and downwardly arranged, the connecting pipe extends to the upper part inside the blowing drying box, a material guide plate which is downwardly and obliquely arranged is fixed on the inner wall of the blowing drying box below the connecting pipe, the free end of the material guide plate extends to the upper part inside the vibration feed hopper, two grinding rollers which are arranged in parallel are rotatably connected inside the grinding and crushing box, grinding teeth are arranged outside the two grinding rollers, the grinding teeth of the two grinding rollers are mutually meshed, the bottom end of the material feeding pipe extends downwards to the inside of the grinding and crushing box and is positioned right above the meshing part of the grinding teeth of the two grinding rollers, two mutually meshed transmission gears are fixedly sleeved outside the roller shafts of the two grinding rollers respectively, a second driving motor is installed at the top of the door-shaped mounting frame, and a driving wheel is fixedly sleeved on the output shaft of the second driving motor, one end of one of the grinding roller shafts extends to the outside of the grinding and crushing box, a driven wheel is fixedly sleeved on the grinding and crushing box, and the driving wheel is in transmission connection with the driven wheel through a transmission chain.

Preferably, hot-blast jetting mechanism is including fixing the air-blower at door font mounting bracket horizontal part top, the inside top level of jetting drying cabinet is provided with hot-blast case, hot-blast case is sealed all around, inside cavity sets up, the air-out end intercommunication of air-blower has the blast pipe, the one end that the blast pipe deviates from the air-blower extends to inside and be linked together with hot-blast incasement portion of jetting drying cabinet, hot-blast incasement portion is fixed with electric heating wire, the bottom of hot-blast case has the hot air shower nozzle of a plurality of even intervals settings along its length direction intercommunication, hot air shower nozzle is located the top of vibration feeder hopper.

Preferably, the top of the inside of drying box is fixed with the striker plate of vertical downward setting near material receiving pipe department, and the bottom of striker plate extends downwards to the top of stone conveyer belt.

The utility model has the advantages that: structural design is reasonable, high durability and convenient operation, through the crushing feed mechanism who sets up mutual intercommunication in stoving case top, the jetting drying cabinet, and set gradually hot-blast jetting mechanism inside the jetting drying cabinet from the top down, the vibration feeder hopper, connect the hopper, the mud cake is before getting into the stoving case, be smashed into graininess mud piece through smashing feed mechanism, through the preliminary drying of jetting drying cabinet again, reduce moisture content, it carries out thorough drying to get into the stoving case at last, can improve dry efficiency, avoid the inside insufficient problem of drying that appears of mud cake, and degree of automation is high, be convenient for realize batch processing.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view showing an internal structure of the pulverizing and feeding mechanism;

FIG. 3 is a schematic view of the connection between the second driving motor and the grinding roller;

FIG. 4 is a schematic view showing a structure in which two grinding rolls are connected;

fig. 5 is a schematic structural view of the connection between the hot air box and the hot air nozzle.

Reference numerals: 1-drying box, 2-door-shaped mounting rack, 3-spreading conveyor belt, 4-first electric heating pipe, 5-discharging pipe, 6-material receiving box, 7-material baffle, 8-blowing drying box, 9-air outlet, 10-filter cloth, 11-mounting ring, 12-vibration feeding hopper, 13-spring, 14-vibration motor, 15-baffle plate, 16-material receiving hopper, 17-material receiving pipe, 18-crushing box, 19-material receiving hopper, 20-material receiving pipe, 21-a first driving motor, 22-a rotating shaft, 23-a spiral cutting blade, 24-a second electric heating pipe, 25-a grinding and crushing box, 26-a connecting pipe, 27-a material guide plate, 28-a grinding roller, 29-a grinding tooth, 30-a transmission gear, 31-a second driving motor, 32-a driving wheel, 33-a driven wheel, 34-a transmission chain, 35-an air blower, 36-a hot air box, 37-an air supply pipe, 38-an electric heating wire and 39-a hot air nozzle.

Detailed Description

As shown in fig. 1, the utility model discloses a stoving case 1 that the level set up, stoving case 1 is sealed all around, inside cavity sets up, 1 top of stoving case is fixed with vertical door font mounting bracket 2 that upwards sets up, 1 inside of stoving case is provided with stone conveyer belt 3 along its length direction level, first electric heating pipe 4 is installed on 1 inside top of stoving case, first electric heating pipe 4 extends along the horizontal direction, 1 bottom intercommunication of stoving case that is located the 3 discharge ends of stone conveyer belt has discharging pipe 5 that the downward sloping set up, discharging pipe 5 below is provided with connects workbin 6. The material at the discharge end of the paving conveyor belt 3 slides downwards into the discharge pipe 5 and enters the material receiving box 6 through the discharge pipe 5. The top of 2 horizontal parts of door font mounting bracket is fixed with and is used for carrying out kibbling crushing feed mechanism to the mud cake, be fixed with jetting drying cabinet 8 between two vertical portions of door font mounting bracket 2, jetting drying cabinet 8 is sealed all around, inside cavity sets up, be linked together between the top of jetting drying cabinet 8 and the bottom of smashing feed mechanism, the inside top of jetting drying cabinet 8 is provided with hot-blast jetting mechanism, gas outlet 9 has been seted up to one side of 8 lower parts of jetting drying cabinet, gas outlet 9 department is fixed with filter cloth 10, filter cloth 10 can only the confession gas pass through and not allow the material to pass through. Be fixed with collar 11 on the inner wall of jetting drying cabinet 8, the inside vibration feeder hopper 12 that is provided with of collar 11, vibration feeder hopper 12 is located the below of hot-blast jetting mechanism, through spring 13 flexible coupling between the periphery on vibration feeder hopper 12 upper portion and the top of collar 11, be fixed with vibrating motor 14 that the symmetry set up on the outer wall of vibration feeder hopper 12 lower part, top-down fixedly connected with a plurality of baffling boards 15 that crisscross the setting in proper order on the inner wall of vibration feeder hopper 12 both sides, baffling board 15 downward sloping sets up, the inside below of jetting drying cabinet 8 is fixed with connects hopper 16, the discharge end downwardly extending of vibration feeder hopper 12 reaches the inside top of connecting hopper 16, the bottom intercommunication of connecting hopper 16 has material receiving pipe 17, material receiving pipe 17 runs through the bottom of jetting drying cabinet 8 in proper order, the top of drying cabinet 1 extends to the top of stone conveyer belt 3 feed end. Through setting up baffling board 15, the extension material is in the inside time of passing through of vibration feeder hopper 12, and the time of extension material and hot-air contact promotes dry effect, and dry material through jetting gets into inside stoving case 1 through material receiving pipe 17. The top of stoving case 1 inside is close to material receiving pipe 17 department and is fixed with striker plate 7 of vertical downward setting, and the bottom of striker plate 7 extends downwards to the top of stone conveyer belt 3. Through setting up striker plate 7, under the stopping of striker plate 7, the maximum thickness that makes the mud of laying on stone conveyer belt 3 is the interval between the bottom of striker plate 7 and the top of stone conveyer belt 3, can avoid the material on the stone conveyer belt 3 to produce and pile up, guarantees that the material is heated evenly, improves dry efficiency, promotes dry effect.

As shown in fig. 1 and 2, the crushing and feeding mechanism comprises a crushing box 18 fixed on the top of the horizontal part of the door-shaped mounting frame 2, the crushing box 18 is obliquely arranged, one end of the top of the crushing box 18 is communicated with a vertically arranged feeding hopper 19, mud cakes are fed into the crushing box 18 through the feeding hopper 19 to be crushed, the other end of the bottom of the crushing box 18 is communicated with a vertically arranged feeding pipe 20, as shown in fig. 1, the feeding pipe 20 penetrates through the top of the horizontal part of the door-shaped mounting frame 2 and is communicated with the inside of the blowing drying box 8, a first driving motor 21 is installed on the side wall of one end of the crushing box 18, an output shaft of the first driving motor 21 is connected with a rotating shaft 22 extending along the length direction of the crushing box 18 through a coupling transmission, one end of the rotating shaft 22 departing from the first driving motor 21 extends into the crushing box 18 and is rotatably connected with the side wall of the crushing box 18 through a bearing, a spiral cutting blade 23 is fixedly sleeved on the periphery of the rotating shaft 22 along the length direction, the spiral cutting blade 23 not only can perform the function of crushing, but also can drive the mud blocks to be conveyed from the feeding hopper 19 to the feeding pipe 20. The upper and lower inner walls of the crushing box 18 are fixed with second electric heating pipes 24, and the second electric heating pipes 24 extend along the length direction of the crushing box 18. The mud cake is heated and dried in the crushing process, so that the mud cake is crushed more easily, the mud cake is prevented from being adhered to the spiral cutting blade 23 due to the moisture in the mud cake, and the crushing effect is improved. A grinding and crushing box 25 is fixed at one end of the top of the door-shaped mounting frame 2, a connecting pipe 26 which is vertically arranged downwards is communicated with the bottom of the grinding and crushing box 25, the connecting pipe 26 extends to the upper part inside the blowing and drying box 8, a material guide plate 27 which is arranged downwards and obliquely is fixed on the inner wall of the blowing and drying box 8 which is positioned below the connecting pipe 26, the free end of the material guide plate 27 extends to the upper part inside the vibration feed hopper 12, two grinding rollers 28 which are arranged in parallel are rotatably connected inside the grinding and crushing box 25, grinding teeth 29 are respectively arranged outside the two grinding rollers 28, the grinding teeth 29 of the two grinding rollers 28 are mutually meshed, the bottom end of the feeding pipe 20 extends downwards to the inside of the grinding and crushing box 25 and is positioned right above the meshing part of the grinding teeth 29 of the two grinding rollers 28, as shown in fig. 4, two transmission gears 30 which are mutually meshed are respectively fixedly sleeved outside the roller shafts of the two grinding rollers 28, as shown in fig. 1 and fig. 3, a second driving motor 31 is installed on the top of the gate-shaped mounting frame 2, a driving wheel 32 is fixedly sleeved on an output shaft of the second driving motor 31, one end of a roller shaft of one of the grinding rollers 28 extends to the outside of the grinding and crushing box 25 and is fixedly sleeved with a driven wheel 33, and the driving wheel 32 is in transmission connection with the driven wheel 33 through a transmission chain 34. The sludge crushed by the crushing box 18 enters the grinding and crushing box 25 through the feeding pipe 20, and is further crushed into small particles or powdery sludge through the grinding of the two grinding rollers 28, so that convenience is brought to the subsequent drying process, and the drying effect is improved. Hot-blast blowing mechanism is including fixing the air-blower 35 at 2 horizontal part tops of door font mounting bracket, the inside top level of jetting drying cabinet 8 is provided with hot-blast case 36, as shown in fig. 5, hot-blast case 36 is sealed all around, inside cavity sets up, the air-out end intercommunication of air-blower 35 has blast pipe 37, blast pipe 37 deviates from the one end of air-blower 35 and extends to the inside and with the inside hot-blast case 36 of jetting drying cabinet 8 and be linked together, hot-blast case 36 is inside to be fixed with electric heating wire 38, the bottom of hot-blast case 36 has the hot air blow head 39 of a plurality of even interval settings along its length direction intercommunication, hot air blow head 39 is located the top of vibration feeder hopper 12. The blower 35 blows air into the hot air box 36, heats the air entering the blowing drying box 8 under the action of the electric heating wire 38, and blows and dries the material by hot air.

The utility model discloses a theory of operation and use: when in use, the first driving motor 21, the second driving motor 31, the vibrating motor 14 and the blower 35 are started, the power supply of the first electric heating pipe 4, the second electric heating pipe 24 and the electric heating wire 38 is turned on, the mud cake is thrown into the crushing box 18 from the feeding hopper 19, the rotating shaft 22 drives the spiral cutting blade 23 to rotate, the spiral cutting blade 23 crushes the mud cake and drives the crushed mud cake to be conveyed from the lower direction of the feeding hopper 19 to the direction close to the feeding pipe 20, during the crushing process, the second electric heating pipe 24 dries the mud cake, the crushed mud cake enters the grinding and crushing box 25 through the feeding pipe 20, is ground by the two grinding rollers 28 and further crushed into small particles or powdered mud, then enters the blowing and drying box 8 through the connecting pipe 26, the mud enters the vibrating and crushing box 12 through the guiding function of the guide plate 27, and under the function of the vibrating motor 14, the sludge is driven to move downwards along the baffle plates 15 in sequence, meanwhile, the air blower 35 blows gas into the hot air box 36, the gas entering the blowing drying box 8 is heated under the action of the electric heating wire 38, the sludge is blown and dried by hot air, the gas inside the blowing drying box 8 is filtered by the filter cloth 10 and then flows outwards, the sludge enters the receiving hopper 16 through the bottom of the vibration feeding hopper 12 and enters the drying box 1 through the receiving pipe 17, the maximum thickness of the sludge laid on the paving conveyor belt 3 is the distance between the bottom end of the blocking plate 7 and the top end of the paving conveyor belt 3 under the blocking of the blocking plate 7, the sludge is driven by the paving conveyor belt 3 to move towards the direction close to the discharge pipe 5, the first electric heating pipe 4 dries the sludge again in the moving process, the dried sludge slides downwards from the discharge end of the paving conveyor belt 3 to the discharge pipe 5, and the sludge enters the inside of the material receiving box 6 through the discharge pipe 5 to obtain the sludge fertilizer which can replace the cultivation fertilizer, and finally the resource treatment of the sludge is realized.

The above-mentioned embodiment is right the utility model discloses an explanation, it is not right the utility model discloses a limited, any right the scheme after the simple transform of the utility model all belongs to the protection scope of the utility model.

Claims (5)

1. The utility model provides a water conservancy river mud resourceful treatment device, includes the stoving case that the level set up, stoving roof portion is fixed with door font mounting bracket, its characterized in that: a paving conveyor belt is horizontally arranged in the drying box along the length direction of the drying box, a first electric heating pipe is arranged at the top end of the drying box, and a discharging pipe which is obliquely arranged downwards is communicated with the bottom of the drying box at the discharging end of the paving conveyor belt; a crushing feeding mechanism for crushing mud cakes is fixed at the top of the horizontal part of the door-shaped mounting frame, a blowing drying box is fixed between two vertical parts of the door-shaped mounting frame, the top of the blowing drying box is communicated with the bottom of the crushing feeding mechanism, a hot air blowing mechanism is arranged above the inside of the blowing drying box, one side of the lower part of the blowing drying box is provided with an air outlet, filter cloth is fixed at the air outlet, a mounting ring is fixed on the inner wall of the blowing drying box, a vibration feeding hopper is arranged inside the mounting ring, the vibration feeding hopper is positioned below the hot air blowing mechanism, the periphery of the upper part of the vibration feeding hopper is in flexible connection with the top of the mounting ring through a spring, vibration motors which are symmetrically arranged are fixed on the outer wall of the lower part of the vibration feeding hopper, and a plurality of baffle plates which are arranged in a staggered way are sequentially and fixedly connected on the inner walls of the two sides of the vibration feeding hopper from top to bottom, baffling board downward sloping sets up, and the inside below of jetting drying cabinet is fixed with and connects the hopper, and the discharge end downwardly extending of vibration feeder hopper connects the inside top of hopper, and the bottom intercommunication that connects the hopper has the material receiving pipe, and the material receiving pipe runs through the bottom of jetting drying cabinet, the top of stoving case in proper order and extends to the top of stone conveyer belt feed end.

2. The water conservancy river mud resourceful treatment device of claim 1, characterized in that: smash feed mechanism including fixing the crushing case at the top of door font mounting bracket horizontal part, smash the slope of case and set up, the one end intercommunication at crushing roof portion has the magazine of vertical setting, the other end intercommunication of smashing the bottom of the case portion has the feeding pipe of vertical setting, feeding pipe runs through the top of door font mounting bracket horizontal part and is linked together with jetting drying cabinet is inside, install first driving motor on the lateral wall of crushing case one end, first driving motor's output shaft has the pivot of extending along the length direction who smashes the case through shaft coupling transmission, the pivot deviates from first driving motor's one end and extends to crushing incasement portion and be connected through the lateral wall rotation of bearing and crushing case, the periphery of pivot is equipped with spiral cutting blade along its fixed cover of length direction, all be fixed with second electric heating pipe on two upper and lower inner walls of crushing case, second electric heating pipe extends along the length direction who smashes the case.

3. The water conservancy river mud resourceful treatment device of claim 2, characterized in that: a grinding and crushing box is fixed at one end of the top of the door-shaped mounting frame, the bottom of the grinding and crushing box is communicated with a connecting pipe which is vertically arranged downwards, the connecting pipe extends to the upper part inside the blowing drying box, a material guide plate which is arranged obliquely downwards is fixed on the inner wall of the blowing drying box below the connecting pipe, the free end of the material guide plate extends to the upper part inside the vibration feed hopper, two grinding rollers which are arranged in parallel are rotatably connected inside the grinding and crushing box, grinding teeth are arranged outside the two grinding rollers, the grinding teeth of the two grinding rollers are mutually meshed, the bottom end of the feeding pipe extends downwards to the inside of the grinding and crushing box and is positioned right above the meshing part of the grinding teeth of the two grinding rollers, two mutually meshed transmission gears are fixedly sleeved outside the roller shafts of the two grinding rollers respectively, a second driving motor is installed at the top of the door-shaped mounting frame, and a driving wheel is fixedly sleeved on the output shaft of the second driving motor, one end of one of the grinding roller shafts extends to the outside of the grinding and crushing box, a driven wheel is fixedly sleeved on the grinding and crushing box, and the driving wheel is in transmission connection with the driven wheel through a transmission chain.

4. The water conservancy river mud resourceful treatment device of claim 3, characterized in that: hot-blast jetting mechanism is including fixing the air-blower at door font mounting bracket horizontal part top, the inside top level of jetting drying cabinet is provided with hot-blast case, hot-blast case is sealed all around, inside cavity sets up, the air-out end intercommunication of air-blower has the blast pipe, the one end that the blast pipe deviates from the air-blower extends to inside and be linked together with hot-blast incasement portion of jetting drying cabinet, hot-blast incasement portion is fixed with electric heating wire, the bottom of hot-blast case has the hot air shower nozzle of a plurality of even interval settings along its length direction intercommunication, hot air shower nozzle is located the top of vibration feeder hopper.

5. The water conservancy river sludge resourceful treatment device according to any one of claims 1 to 4, wherein: the top of the inside portion of stoving case is close to material receiving pipe department and is fixed with the striker plate of vertical downward setting, and the bottom downwardly extending of striker plate extends the top of stone conveyer belt.

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