CN210762740U - Wet coal slime positive pressure conveying device - Google Patents

Abstract

The utility model discloses a wet coal slime malleation conveyor relates to electric power system's wet coal slime and carries technical field. This conveyor includes the main casing body that comprises feeder hopper, conveyer pipe and axle box, the main casing body in parallel be provided with two and carry the axle, the right-hand member of the main casing body is provided with and is used for the drive carry an pivoted drive unit, the epaxial equipartition of transport be provided with a plurality of transport blade along first helix helical arrangement, transport blade be helical structure, just the second helix at transport blade place with first helix coincidence. The device not only effectively solves the problems of low conveying efficiency and short conveying distance, but also reduces the energy consumption by designing the conveying blades into an intermittent spiral structure.

Description

Wet coal slime positive pressure conveying device

Technical Field

The utility model belongs to the technical field of electric power system's wet coal slime carries technique and specifically relates to a wet coal slime malleation conveyor.

Background

With the rapid development of the coal processing industry, the coal washing proportion is improved year by year, the coal slime yield is greatly increased, and the coal slime yield in China can reach 3.6 hundred million tons in 2020. Due to the limitation of technical conditions and practical situations, a large amount of coal slime cannot be effectively utilized and is discarded. The accumulation of coal slime not only causes serious pollution, but also causes waste of coal resources. The CFB boiler coal slime mixed combustion power generation is the best way for coal slime resource utilization. The CFB boiler coal slime mixed-burning power generation technology based on pipeline conveying has the advantages of clean and closed conveying process, accurate and controllable flow, seamless connection with the CFB boiler and the like, and is widely applied in recent years.

However, the technology is troubled by engineers in practical application, and has two main problems:

firstly, the resistance of pipeline conveying coal slime is large, the conveying distance is short, and the problem of insufficient pipeline conveying distance is more and more prominent under the background that the coal industry in China is developed towards the integrated mode of coal mining, coal dressing and power generation.

Secondly, as the seepage of the viscous materials can enter the bearing assembly in the conveying process, the bearing is damaged prematurely, and the normal operation of the equipment is affected.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides a wet coal slime malleation conveyor, the device not only effectively solved the conveying efficiency low through designing into intermittent type's helical structure with conveying blade, and the problem of transport distance weak point has reduced the energy consumption moreover. In addition, the bearing assembly is arranged outside the axle connecting box, and an externally-hung design is adopted, so that seepage of effectively-avoided sticky materials enters the bearing assembly, the service life of the bearing assembly is prolonged, and normal operation of equipment is guaranteed.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model provides a wet coal slime malleation conveyor, includes the main casing body that comprises feeder hopper, conveyer pipe and axle box even, the main casing body in the parallel be provided with two and carry the axle, the right-hand member of the main casing body is provided with and is used for the drive carry an pivoted drive unit, the epaxial equipartition of transport be provided with a plurality of transport blade along first helix spiral arrangement, transport blade be helical structure, just the second helix at transport blade place with first helix coincidence.

Further, the projection of the conveying blade on the cross section is in a fan shape.

Further, the center angle of the conveying blade is 90 °.

Furthermore, the conveying shaft sequentially comprises a left end shaft, an intermediate shaft and a right end shaft from left to right, the conveying blades are fixedly arranged on the intermediate shaft, the left end shaft and the right end shaft are solid shafts, the intermediate shaft is a hollow shaft, the inner ends of the left end shaft and the right end shaft are respectively provided with an inserting shaft inserted into the intermediate shaft, and two ends of the intermediate shaft are respectively fixedly connected with the left end shaft and the right end shaft in a welding mode.

Furthermore, a bearing seat is arranged on the right side of the axle connecting box, the right end shaft penetrates through the side wall of the axle connecting box and then is rotatably connected with the bearing seat through a bearing assembly, and a sealing assembly is arranged between the right end shaft and the side wall of the axle connecting box.

Furthermore, the bearing seat is fixedly connected with the connecting shaft box through a bearing seat mounting plate.

Furthermore, a sealing seat is fixedly arranged on the axle connecting box, and the sealing assembly is arranged between the right end axle and the sealing seat.

Furthermore, a lifting ring screw is arranged on the driving unit, and a rope is connected to the lifting ring screw.

Further, the rope fixing device comprises a fixing frame, wherein the fixing frame comprises a bottom plate, a vertical beam and a cross beam, the bottom plate, the vertical beam and the cross beam form a C-shaped structure together, and the upper end of the rope is fixedly connected with the cross beam.

Furthermore, the feed hopper and the axle connecting box are both provided with dredging openings, the dredging openings are provided with cover plates, and the cover plates are provided with handles.

The utility model has the advantages that:

1. the device is through designing into intermittent type helical structure with conveying blade to just the in-process of carrying produces propulsion district and free area, and like this, conveying blade can produce the action of constantly cutting the coal slime at the pivoted in-process, thereby avoids the coal slime to be encircleed by continuous extrusion knot at the in-process of carrying, and the effectual conveying distance that has solved is short, the problem of inefficiency.

2. Due to the cutting action of the conveying blades, the conveying resistance is reduced, and therefore the energy consumption of the motor is reduced.

3. This device adopts outer hanging design through setting up bearing assembly in the outside of axle box, and the seepage liquid of the sticky material of effectual avoidance enters into the bearing assembly in, has prolonged the life of bearing assembly, guarantees the normal operating of equipment.

Drawings

FIG. 1 is a front view of a delivery device;

FIG. 2 is a top view of the feed inlet of the conveyor;

FIG. 3 is a cross-sectional view A-A of FIG. 1;

FIG. 4 is a diagram illustrating the operation of a screw conveyor shaft in a conventional conveyor apparatus;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 2;

FIG. 6 is a schematic view of the structure at the coupling box;

FIG. 7 is an enlarged view of portion A of FIG. 6;

fig. 8 is a schematic view of a fixing structure of a motor part in the second embodiment.

In the figure: 11-a feed hopper, 12-a feed delivery pipe, 13-a connecting shaft box, 131-a bearing seat mounting plate, 132-a first rib plate, 14-a cover plate, 141-a handle, 21-a left end shaft, 22-a right end shaft, 23-a middle shaft, 231-a conveying blade, 24-a plug shaft, 3-a driving unit, 4-a bearing seat, 5-a sealing seat, 61-a bottom plate, 62-a vertical beam, 63-a cross beam and 64-a second rib plate.

Detailed Description

Example one

As shown in fig. 1 and 2, the wet coal slurry positive pressure conveying device comprises a main housing, the main housing comprises a feed hopper 11, a conveying pipe and a coupling box 13 from left to right, wherein the feed hopper 11 is a box body with an open upper end. The main casing body in the parallel be provided with two and carry the axle, just carry the left and right both ends of axle respectively through bearing assembly with the main casing body rotate and be connected. That is, the left end of the conveying shaft is rotatably connected to the left sidewall of the feed hopper 11 through a bearing assembly, and the right end of the conveying shaft is rotatably connected to the right sidewall of the coupling box 13 through a bearing assembly. The right end of the main shell is provided with a driving unit 3 for driving the conveying shaft to rotate.

Here, the driving unit 3 may drive the two conveying shafts to rotate in opposite directions by using a motor, a speed reducer and a gear structure in the prior art, which belongs to the prior art and is not described herein again.

As shown in fig. 2 and 3, a plurality of conveying blades 231 are uniformly distributed on the conveying shaft, and the plurality of conveying blades 231 are arranged in a spiral structure along a first spiral line. The conveying blade 231 is of a spiral structure, and a second spiral line where the conveying blade 231 is located coincides with the first spiral line.

Preferably, the projection of the conveying blade 231 on the cross section (a plane perpendicular to the axis of the conveying shaft) is a sector, and the central angle of the sector is 90 °.

To facilitate understanding of the present patent solution, a simple description of the conventional conveying process of the helical blade structure will be given.

As shown in fig. 4, in the conventional conveying device, the blade on the conveying shaft is a continuous spiral blade. In the figure, the state of the screw blade is shown from top to bottom when the conveying shaft rotates a certain angle in sequence. As can be seen from the position shift of the dotted line boxes in the figure, the area formed by the helical blades on the two conveying shafts is always constant during the rotation of the traditional conveying shafts, and only the helical blades advance along with the rotation of the conveying shafts. Namely, after the coal slurry enters between the two helical blades, the shape of the coal slurry is not changed (similar to the matching relation between the external thread and the internal thread), and only certain shape is kept to be pushed forwards along with the rotation of the conveying shaft. As the transport process proceeds. The moisture in the coal slime can continuously seep out, the coal slime becomes dry, and the phenomenon of arching appears. The resistance to transport will then be greater and the further away from the feed end the resistance will be greater. At this time, the coal slurry at the feeding end still keeps a relatively loose state, and the input pressure is not large, so that the overall conveying speed of the coal slurry is gradually reduced along the conveying path. I.e. more in and less out. Thus, the problem of the coal slime arch accumulation is gradually serious along the conveying path until the coal slime arch accumulation is completely blocked, which is the limit distance of the conveying.

Comparing the above processes, the scheme of this patent is analyzed.

In the scheme, the conveying blades 231 adopt an intermittent spiral structure, so that a pushing area and a free area shown in fig. 3 can be formed in the rotating process of the conveying shaft, coal slime moves forwards under the pushing action of the conveying blades 231 in the pushing area, and the coal slime is in a natural flowing state in the free area without the limitation of the conveying blades 231. In the conveying process, the conveying blades 231 are always in the action of transferring from the propulsion area to the free area, so that the coal slime in the free area is continuously cut, a certain stirring effect is achieved, and the problem of arching caused by seepage of moisture in the coal slime is avoided.

Further, as shown in fig. 5, the conveying shaft sequentially comprises a left end shaft 21, an intermediate shaft 23 and a right end shaft 22 from left to right, wherein the left end shaft 21 and the right end shaft 22 are respectively rotatably connected with the main housing through a bearing assembly, and the conveying blades 231 are fixedly arranged on the intermediate shaft 23 in a welding manner. The left end shaft 21 and the right end shaft 22 are solid shafts, and the intermediate shaft 23 is a hollow shaft. The inner ends of the left end shaft 21 and the right end shaft 22 are respectively provided with an inserting shaft 24, the inserting shaft 24 is inserted into the intermediate shaft 23, and two ends of the intermediate shaft 23 are respectively fixedly connected with the left end shaft 21 and the right end shaft 22 in a welding mode.

Because the machining precision requirement on the shaft surface is higher when the shaft is matched with the bearing assembly, the left end shaft 21 and the right end shaft 22 are subjected to finish machining, the intermediate shaft 23 only needs to be subjected to simple cutting and welding, the simplified machining process is realized, and the production cost is reduced.

Further, as shown in fig. 6, a bearing seat 4 is disposed outside the coupling box 13 at the right side of the coupling box 13, and the right end shaft 22 passes through the side wall of the coupling box 13 and is rotatably connected to the bearing seat 4 through a bearing assembly. The bearing seat 4 is fixedly connected with the connecting shaft box 13 through a bearing seat mounting plate 131, and a first rib plate 132 is arranged between the bearing seat mounting plate 131 and the connecting shaft box 13. And a sealing assembly is arranged between the right end shaft 22 and the side wall of the connecting shaft box 13.

Here, the sealing assembly is in the prior art and will not be described in detail herein.

Further, in order to improve the sealing effect, as shown in fig. 7, a sealing seat 5 is fixedly disposed on the coupling box 13, and the sealing assembly is disposed between the right end shaft 22 and the sealing seat 5.

As a specific implementation manner, in this embodiment, the sealing seat 5 includes a cylinder, and one end of the cylinder is provided with a flange, and the flange is fixedly connected to the side wall of the axle connecting box 13 through a screw.

Further, since the length of the conveying shaft is increased by adopting the structure, the structure is unstable, and in order to solve the problem, as shown in fig. 6, a lifting bolt is arranged on the driving unit 3, a rope for bearing the weight of the driving unit 3 is connected to the lifting bolt, and the upper end of the rope is fixed on a top fixing beam of a building.

Further, in order to clean the feeding hopper 11 and the coupling box 13 conveniently, as shown in fig. 1, the feeding hopper 11 and the coupling box 13 are both provided with a dredging opening, the dredging opening is provided with a cover plate 14, and the cover plate 14 is fixedly connected with the main housing through screws. The cover plate 14 is provided with a handle 141.

Example two

As shown in fig. 8, the wet coal slurry positive pressure conveying device further comprises a fixing frame, the fixing frame comprises a bottom plate 61, a vertical beam 62 is arranged on the bottom plate 61, a cross beam 63 is arranged at the top end of the vertical beam 62, and the bottom plate 61, the vertical beam 62 and the cross beam 63 form a C-shaped structure together. The upper end of the rope is fixedly connected with the cross beam 63.

Further, in order to enhance the structural strength of the fixing frame, second rib plates 64 are arranged between the bottom plate 61 and the vertical beams 62, and between the cross beam 63 and the vertical beams 62.

The rest of the structure is the same as the first embodiment.

Claims (10)

1. The utility model provides a wet coal slime malleation conveyor, includes the main casing body that comprises feeder hopper, conveyer pipe and axle box, the main casing body in the parallel be provided with two and carry the axle, the right-hand member of the main casing body is provided with and is used for the drive carry axle pivoted drive unit, its characterized in that: the conveying shaft is uniformly provided with a plurality of conveying blades which are spirally arranged along a first spiral line, each conveying blade is of a spiral structure, and a second spiral line where the conveying blades are located coincides with the first spiral line.

2. The wet coal slurry positive pressure conveying device according to claim 1, wherein: the projection of the conveying blade on the cross section is fan-shaped.

3. The wet coal slurry positive pressure conveying device according to claim 2, wherein: the central angle of the conveying blade is 90 degrees.

4. The wet coal slurry positive pressure conveying device according to claim 1, wherein: carry the axle to turn right from a left side and include left end axle, jackshaft and right-hand member axle in proper order, the transport blade fixed set up on the jackshaft, left end axle and right-hand member axle be solid axle, the jackshaft be the hollow shaft, the inner of left end axle and right-hand member axle is provided with the plug-in axle that inserts in the jackshaft respectively, the both ends of jackshaft respectively through welded mode with left end axle, right-hand member axle fixed connection.

5. The wet coal slurry positive pressure conveying device according to claim 4, wherein: the right side of the axle connecting box is provided with a bearing seat, the right end shaft penetrates through the side wall of the axle connecting box and then is rotationally connected with the bearing seat through a bearing assembly, and a sealing assembly is arranged between the right end shaft and the side wall of the axle connecting box.

6. The wet coal slurry positive pressure conveying device according to claim 5, wherein: the bearing seat is fixedly connected with the connecting shaft box through a bearing seat mounting plate.

7. The wet coal slurry positive pressure conveying device according to claim 5, wherein: the connecting shaft box is fixedly provided with a sealing seat, and the sealing assembly is arranged between the right end shaft and the sealing seat.

8. The wet coal slurry positive pressure conveying device according to claim 4, wherein: the driving unit is provided with a lifting ring screw, and a rope is connected to the lifting ring screw.

9. The wet coal slurry positive pressure conveying device according to claim 8, wherein: the rope fixing frame comprises a bottom plate, a vertical beam and a cross beam, the bottom plate, the vertical beam and the cross beam jointly form a C-shaped structure, and the upper end of the rope is fixedly connected with the cross beam.

10. The wet coal slurry positive pressure conveying device according to claim 1, wherein: the device is characterized in that the feed hopper and the axle connecting box are both provided with dredging openings, the dredging openings are provided with cover plates, and the cover plates are provided with handles.

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