Pebble coal conveying feeder

Abstract

The utility model relates to a pebble coal conveying and feeding machine which comprises a driving assembly. The shell assembly is connected with the driving assembly, at least one cooling pipeline is arranged on the shell assembly, and the cooling pipeline extends in the length direction of the shell assembly; the shaftless conveying blade is arranged in the shell assembly and connected with the output end of the driving assembly, and knurling is arranged on the surface of the shaftless conveying blade; the cooling assembly is connected with the cooling pipeline, slender impurities in waste can be prevented from being wound on the rotating shaft by adopting the shaftless conveying blades, the waste in the shell assembly can be cooled by arranging the cooling pipeline on the shell assembly, the problem of waste coking is solved, and the service life of the waste is prolonged. The problems that slender impurities contained in existing waste can be wound on a rotating shaft of a spiral conveyor, the temperature of the waste is high, the waste is prone to coking, and lifting and waste conveying of the spiral conveyor are not facilitated can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal power generation, in particular to a stone coal conveying feeder. Background Art

[0002] Pebble coal is a waste product produced during the coal powder preparation process in large coal-fired power plants, mainly discharged from the coal pulverizers in power plants.

[0003] In actual applications, waste discharged from the coal mill is usually transported to the negative pressure conveying system through a screw conveyor for timely discharge. When conveying stone coal through a screw conveyor, on the one hand, since the waste discharged from the coal mill contains more impurities, slender impurities often get entangled on the rotating shaft of the screw conveyor; on the other hand, since the temperature of the discharged waste is relatively high, coking will still occur after being discharged from the coal mill, which is not conducive to the screw conveyor to lift and transport the waste. Utility Model Content

[0004] The embodiment of the utility model provides a stone coal conveying feeder, which can solve the problem that slender impurities contained in the existing waste will be entangled on the rotating shaft of the screw conveyor, the waste temperature is high and coking is easy to occur, which is not conducive to the screw conveyor to lift and transport the waste.

[0005] The present invention provides a stone coal conveying feeder, comprising:

[0006] Drive components;

[0007] A housing assembly connected to the driving assembly and provided with at least one cooling pipeline, the cooling pipeline extending along the length direction of the housing assembly;

[0008] A shaftless conveying blade is disposed in the housing assembly and connected to the output end of the driving assembly, wherein the surface of the shaftless conveying blade is provided with embossing;

[0009] A cooling component is connected to the cooling pipeline.

[0010] In some embodiments, the drive assembly comprises:

[0011] Motor;

[0012] A reducer connected to the motor;

[0013] A coupling has one end connected to the reducer and the other end connected to the shaftless conveying blade.

[0014] In some embodiments, the housing assembly comprises:

[0015] A housing on which the cooling pipeline is disposed, and the cooling pipeline is connected to the cooling assembly;

[0016] A feed inlet, arranged above the tail of the shell;

[0017] A discharge port is provided below the head of the shell;

[0018] The tail end quick opening structure is arranged at the tail end of the shell.

[0019] In some embodiments, the tail end quick opening structure includes:

[0020] A bottom plate connected to the rear end of the housing and having a rear end inspection hole;

[0021] A cover plate detachably abutted against the bottom plate to block the tail end inspection hole;

[0022] The support frame is arranged on the bottom plate and straddles the cover plate, and is provided with a tightening bolt for tightening the cover plate.

[0023] In some embodiments, the tail end quick opening structure further includes two limit rods, which are disposed on the base plate and symmetrically arranged along the vertical center line of the tail end inspection hole for limiting the cover plate.

[0024] In some embodiments, the bottom plate is a hollow structure, the bottom plate is connected to the cooling pipeline, and a drain port is provided on the bottom plate, and the drain port is connected to the cooling assembly.

[0025] In some embodiments, the cooling assembly comprises:

[0026] a water pump connected to the cooling pipeline;

[0027] The heat exchange structure has one end connected to the water pump and the other end connected to the drain port.

[0028] In some embodiments, the cooling assembly further includes a temperature sensor, wherein the temperature sensor is disposed in the housing and connected to the water pump.

[0029] In some embodiments, the lifting angle of the shaftless conveying blade is 18°, and the blade inclination angle of the shaftless conveying blade is 46°.

[0030] In some embodiments, the at least one cooling pipeline is a plurality of cooling pipelines, and the plurality of cooling pipelines are arranged at intervals along the circumference of the shell assembly.

[0031] Compared with the prior art, the advantage of the embodiment of the utility model is that, by adopting the shaftless conveying blade, it is possible to prevent slender impurities in the waste from being entangled on the rotating shaft, and by arranging a cooling pipeline on the shell assembly, the waste in the shell assembly can be cooled to reduce the problem of waste coking. It can solve the problem that slender impurities contained in the existing waste will be entangled on the rotating shaft of the screw conveyor, the waste temperature is high, coking is prone to occur, and it is not conducive to the screw conveyor to lift and transport the waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0033] Figure 1 This is a front view of a pebble coal conveying feeder provided by an embodiment of the utility model;

[0034] Figure 2 This is a front view of a tail end quick-opening structure provided by an embodiment of the utility model;

[0035] Figure 3 It is a side view of a tail end quick-opening structure provided by an embodiment of the utility model.

[0036] Reference numerals:

[0037] 10. driving assembly; 110. motor; 120. reducer; 130. coupling;

[0038] 20. Shell assembly; 210. Shell; 220. Discharge port; 2201. Discharge pipe; 2202. Discharge flange; 230. Feed port; 2301. Feed pipe; 2302. Feed flange; 240. Tail end quick-opening structure; 2401. Bottom plate; 2402. Cover plate; 2403. Support frame; 2403A. Crossbeam; 2403B. Support plate; 2404. Tightening bolt; 2405. Limit rod. DETAILED DESCRIPTION

[0039] The utility model will be further described below in conjunction with the accompanying drawings.

[0040] Pebble coal refers to the stones, coal ore and metal blocks that are not ground into coal powder after the raw coal is ground by the coal mill. Every coal-fired power plant discharges a large amount of pebble coal every year. Pebble coal has a high temperature (usually around 150°C), large particles and contains dust, so it is difficult to transport. At present, domestic thermal power plants usually handle pebble coal by manual transportation, mechanical transportation, hydraulic transportation and negative pressure pneumatic transportation. Among them, negative pressure pneumatic transportation has the advantages of simple system layout, small maintenance workload, water saving and good economic benefits compared with mechanical transportation and hydraulic transportation, so it is widely used.

[0041] When using negative pressure pneumatic conveying to transport pebble coal, it is necessary to transfer the pebble coal discharged from the coal mill to the negative pressure pneumatic conveying pipeline for pneumatic conveying. This step is usually achieved through a screw conveyor. However, when transporting the pebble coal through a screw conveyor, on the one hand, since the waste (pebble coal) discharged from the coal mill contains more impurities, slender impurities often entangle the rotating shaft of the screw conveyor, causing the screw conveyor to become stuck; on the other hand, since the temperature of the discharged waste is relatively high, coking will still occur after discharging the coal mill, which is not conducive to the screw conveyor to lift and transport the waste.

[0042] In response to the above technical issues, such as Figure 1 , Figure 2 , Figure 3 As shown, the embodiment of the present application provides a stone coal conveying feeder, comprising:

[0043] A drive assembly 10;

[0044] The housing assembly 20 is connected to the driving assembly 10 and is provided with at least one cooling pipeline, which extends along the length direction of the housing assembly 20;

[0045] The shaftless conveying blade is arranged in the housing assembly 20 and connected to the output end of the driving assembly 10, wherein the surface of the shaftless conveying blade is provided with embossing;

[0046] A cooling assembly is connected to the cooling pipeline.

[0047] It should be noted that the cooling assembly is used to provide coolant for the cooling pipeline. The driving assembly 10 is located at the upper left of the shell assembly 20. The outer side of the driving assembly 10 is connected to the shell assembly 20. The output end (i.e., the inside) of the driving assembly 10 is connected to the shaftless conveying blade to drive the shaftless conveying blade to rotate. The embossing is provided on the upper surface, lower surface and side of the shaftless conveying blade. By providing embossing on the surface of the shaftless conveying blade, the friction of the shaftless conveying blade on the stone coal can be increased, thereby improving the conveying efficiency. The density and depth of the embossing pattern can be set according to actual needs, and this application does not make specific limitations.

[0048] In some embodiments, the drive assembly 10 includes:

[0049] Motor 110;

[0050] A reducer 120 connected to the motor 110;

[0051] The coupling 130 has one end connected to the reducer 120 and the other end connected to the shaftless conveying blade.

[0052] It should be noted that the motor 110 can be a servo motor, the reducer 120 can be a planetary gear reducer 120, the outer wall of the coupling 130 is connected to the housing assembly 20, and the inner side of the coupling 130 is connected to the shaftless conveying blade.

[0053] In some embodiments, the housing assembly 20 includes:

[0054] A housing 210, on which a cooling pipeline is provided, and the cooling pipeline is connected to a cooling assembly;

[0055] A feed inlet 230 is disposed above the rear end of the housing 210;

[0056] The discharge port 220 is disposed below the head of the housing 210;

[0057] The tail end quick opening structure 240 is disposed at the tail end of the housing 210 .

[0058] It should be noted that the cooling pipeline is a channel arranged in the housing 210. Figure 1 A fluid inlet is provided on the outer shell 210, and the cooling pipeline is connected to the cooling component through the fluid inlet. A top plate can also be provided at the head of the outer shell 210, and the top plate is a hollow structure, so that the cooling pipeline is connected to the top plate, and the top plate is connected to the cooling component to realize the connection between the cooling component and the cooling pipeline.

[0059] It should be noted that since the feed port 230 and the discharge port 220 are locations where jamming is more likely to occur, a discharge inspection door may be provided above the discharge port 220, and a feed inspection door may be provided on the left side, or on the front and rear sides of the feed port 230 to facilitate maintenance, wherein the size of the feed inspection door and the discharge inspection door are usually larger than the size of the feed port 230 and the discharge port 220.

[0060] It should be noted that the feed port 230 includes a feed pipe 2301 and a feed flange 2302, the lower end of the feed pipe 2301 is connected to the outer shell 210, the upper end of the feed port 230 is connected to the feed flange 2302, and the feed flange 2302 is used to be connected to the coal mill; the discharge port 220 includes a discharge pipe 2201 and a discharge flange 2202, the upper end of the discharge pipe 2201 is connected to the outer shell 210, the lower end of the discharge pipe 2201 is connected to the discharge flange 2202, and the discharge flange 2202 is connected to the pipeline of the negative pressure pneumatic conveying system.

[0061] In some embodiments, the tail end quick opening structure 240 includes:

[0062] The bottom plate 2401 is connected to the rear end of the housing 210 and has a rear end inspection hole;

[0063] The cover plate 2402 is detachably connected to the bottom plate 2401 to block the rear end inspection hole;

[0064] The support frame 2403 is disposed on the bottom plate 2401 and straddles the cover plate 2402 . A tightening bolt 2404 is disposed on the support frame 2403 . The tightening bolt 2404 is used to tighten the cover plate 2402 .

[0065] It should be noted that the impurities stuck between the housing 210 and the shaftless conveying blade can be discharged in time through the tail end quick opening structure 240. The support frame 2403 includes two support plates 2403B and a crossbeam 2403A. The two support plates 2403B are respectively located at the two ends of the bottom plate 2401 in the horizontal direction and are arranged across the tail end inspection hole. The crossbeam 2403A is arranged on the two support plates 2403B. The crossbeam 2403A is provided with a tightening bolt 2404. When in the blocking state, the tightening bolt 2404 presses against the cover plate. 2402, so as to press the cover plate 2402 against the bottom plate 2401, so as to achieve blocking; in the maintenance state, the cover plate 2402 can be removed by unscrewing the tightening bolts 2404, wherein the crossbeam 2403A and the two support plates 2403B can be detachably connected, or hinged, or one end can be detachably connected and the other end can be hinged. When one end is detachably connected and the other end is hinged, after the cover plate 2402 is removed, the rear end inspection hole can be fully exposed by rotating the crossbeam 2403A for maintenance.

[0066] It should be noted that the structures of the aforementioned feed inspection door and discharge inspection door may be the same as the structure of the tail end quick opening structure 240, or a hinge structure may be adopted.

[0067] In some embodiments, the tail end quick opening structure 240 further includes two limiting rods 2405 , which are disposed on the bottom plate 2401 and symmetrically arranged along the vertical center line of the tail end inspection hole for limiting the cover plate 2402 .

[0068] It should be noted that by providing two limit rods 2405, the position of the cover 2402 can be positioned during installation, and at the same time, the cover 2402 can be prevented from sliding downward during operation. A handle can be provided at the upper end of the cover 2402 so that the cover 2402 can be easily pulled out.

[0069] In some embodiments, the bottom plate 2401 is a hollow structure, the bottom plate 2401 is connected to the cooling pipeline, and a drain port is provided on the bottom plate 2401, and the drain port is connected to the cooling assembly.

[0070] It should be noted that by making the bottom plate 2401 a hollow structure and connecting it to the cooling assembly through the drainage port on the bottom plate 2401, the length of the cooling pipeline can be extended to fully cool the pebble coal in the shell 210.

[0071] In some embodiments, the cooling assembly includes:

[0072] A water pump connected to the cooling pipeline;

[0073] The heat exchange structure has one end connected to the water pump and the other end connected to the drain.

[0074] In some embodiments, the cooling assembly further includes a temperature sensor, which is disposed in the housing 210 and connected to the water pump.

[0075] It should be noted that the water pump can adopt a variable frequency water pump to control the flow rate of the coolant. The temperature sensor and the water pump can be connected wirelessly. When the temperature sensor detects that the temperature inside the shell 210 is high, the flow rate of the fluid in the cooling pipeline can be increased by controlling the water pump to achieve the effect of lowering the temperature of the pebble coal, thereby reducing or avoiding the coking of the pebble coal.

[0076] In some embodiments, the lifting angle of the shaftless conveying blade is 18°, and the blade inclination angle of the shaftless conveying blade is 46°.

[0077] It should be noted that the lifting angle of the shaftless conveying blade is matched with the blade inclination angle of the shaftless conveying blade to reduce the slipping of the pebble coal when the blade rotates. When the lifting angle is 18° and the blade inclination angle is 46°, the effect of reducing the slipping of the pebble coal can be better achieved.

[0078] It should be noted that the shaftless conveying blades and the shell assembly 20 are both made of stainless steel, which can withstand the high temperature of stone coal and is not prone to rust.

[0079] In some embodiments, the at least one cooling line is a plurality of cooling lines, and the plurality of cooling lines are spaced apart along the circumference of the housing assembly 20 .

[0080] It should be noted that multiple cooling pipes can be evenly distributed along the circumference of the shell assembly 20, or multiple cooling pipes with a higher density can be set in the lower half of the shell 210, and multiple cooling pipes with a lower density can be set in the upper half of the shell 210, so as to cool the stone coal in the shell 210 in a targeted manner.

[0081] In summary, compared with the prior art, the advantages of the embodiments of the utility model are that, by adopting shaftless conveying blades, it is possible to prevent slender impurities in the waste from being entangled on the rotating shaft, and by arranging a cooling pipeline on the shell assembly 20, the waste in the shell assembly 20 can be cooled to reduce the problem of waste coking. This can solve the problem that slender impurities contained in the existing waste will be entangled on the rotating shaft of the screw conveyor, the waste temperature is high, and coking is prone to occur, which is not conducive to the screw conveyor to lift and transport the waste.

Claims

1. A stone coal conveying feeder, characterized in that: include: Drive components; A housing assembly connected to the driving assembly and provided with at least one cooling pipeline, the cooling pipeline extending along the length direction of the housing assembly; A shaftless conveying blade is disposed in the housing assembly and connected to the output end of the driving assembly, wherein the surface of the shaftless conveying blade is provided with embossing; A cooling component is connected to the cooling pipeline.

2. The stone coal conveying feeder according to claim 1, characterized in that: The drive assembly comprises: Motor; A reducer connected to the motor; A coupling has one end connected to the reducer and the other end connected to the shaftless conveying blade.

3. The stone coal conveying feeder according to claim 1, characterized in that: The housing assembly comprises: A housing on which the cooling pipeline is disposed, and the cooling pipeline is connected to the cooling assembly; A feed inlet, arranged above the tail of the shell; A discharge port is provided below the head of the shell; The tail end quick opening structure is arranged at the tail end of the shell.

4. The stone coal conveying feeder according to claim 3, characterized in that: The tail end quick opening structure comprises: A bottom plate connected to the rear end of the housing and having a rear end inspection hole; A cover plate detachably abutted against the bottom plate to block the tail end inspection hole; The support frame is arranged on the bottom plate and straddles the cover plate, and is provided with a tightening bolt for tightening the cover plate.

5. The stone coal conveying feeder according to claim 4, characterized in that: The tail end quick opening structure also includes two limiting rods, which are arranged on the bottom plate and symmetrically arranged along the vertical center line of the tail end inspection hole to limit the cover plate.

6. The stone coal conveying feeder according to claim 4, characterized in that: The bottom plate is a hollow structure, the bottom plate is connected to the cooling pipeline, and a drain port is provided on the bottom plate, and the drain port is connected to the cooling assembly.

7. The stone coal conveying feeder according to claim 6, characterized in that: The cooling assembly comprises: a water pump connected to the cooling pipeline; The heat exchange structure has one end connected to the water pump and the other end connected to the drain port.

8. The stone coal conveying feeder according to claim 7, characterized in that: The cooling assembly further includes a temperature sensor, which is disposed in the housing and connected to the water pump.

9. The stone coal conveying feeder according to any one of claims 1 to 8, characterized in that: The lifting angle of the shaftless conveying blade is 18°, and the blade inclination angle of the shaftless conveying blade is 46°.

10. The stone coal conveying feeder according to any one of claims 1 to 8, characterized in that: The at least one cooling pipeline is a plurality of cooling pipelines, and the plurality of cooling pipelines are arranged at intervals along the circumference of the shell assembly.

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