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CN-121977888-A - Pulverized coal sampling device of thermal power plant

CN121977888ACN 121977888 ACN121977888 ACN 121977888ACN-121977888-A

Abstract

The invention discloses a pulverized coal sampling device of a thermal power plant, which comprises a shell and a power source, a power distribution mechanism, a drill rod and a guide sleeve, wherein the power distribution mechanism is provided with a first power output end and a second power output end, the power input end of the power distribution mechanism is connected with an output shaft of the power source, the drill rod is rotationally connected with the shell, one end of the drill rod is connected with the first power output end of the power distribution mechanism to obtain rotary driving force, the guide sleeve is connected with the shell through a axial sliding mechanism and a position constraint mechanism, the guide sleeve is in sleeve joint arrangement with the drill rod, one end of the guide sleeve is connected with the second power output end of the power distribution mechanism, and a discharge hole is further formed in the side wall of the guide sleeve to collect pulverized coal screwed by the drill rod. This thermal power plant fine coal sampling device has and realizes the accurate sampling and use convenient beneficial effect to different degree of depth in the sampling area.

Inventors

  • CHEN WEI
  • YU PENGJIE
  • GUO KAIXUAN

Assignees

  • 华电邹县发电有限公司

Dates

Publication Date
20260505
Application Date
20260210

Claims (10)

  1. 1. A pulverized coal sampling device of a thermal power plant, comprising: a housing; the power source is arranged at the machine shell; The power distribution mechanism is provided with a first power output end and a second power output end, and the power input end of the power distribution mechanism is connected with the output shaft of the power source; A drill rod (107) rotatably connected to the casing, one end of which is connected to a first power output end of the power distribution mechanism to obtain a rotational driving force; The guide sleeve (106) is connected with the shell through the axial sliding mechanism and the position constraint mechanism, the axial sliding mechanism is used for constraining the movement direction of the guide sleeve (106), the position constraint mechanism is used for constraining the travel of the guide sleeve (106), the guide sleeve (106) and the drill rod (107) are in sleeve joint arrangement, one end of the guide sleeve is connected with the second power output end of the power distribution mechanism so as to acquire axial impact force, and the side wall of the guide sleeve is also provided with a discharge hole (105) so as to collect pulverized coal screwed up by the drill rod (107).
  2. 2. The pulverized coal sampling apparatus of a thermal power plant according to claim 1, wherein the power distribution mechanism comprises: The transmission main shaft (103) is rotationally connected with the support (102), a deflector rod (113) is arranged on the side portion of the transmission main shaft (103), the top end of the transmission main shaft (103) is a power input end, the bottom end of the transmission main shaft is a first power output end, and the deflector rod (113) is a second power output end.
  3. 3. The pulverized coal sampling device of a thermal power plant according to claim 2, characterized in that two shift levers (113) are provided, and the two shift levers (113) are axisymmetrically distributed along the transmission main shaft (103).
  4. 4. A pulverized coal sampling apparatus in a thermal power plant according to claim 3, characterized in that the axial sliding mechanism comprises a linear bearing (104), the linear bearing (104) is fixedly connected with the casing, and the guide sleeve (106) is inserted at the linear bearing (104).
  5. 5. The pulverized coal sampling device for a thermal power plant according to claim 4, wherein a plurality of protruding blocks are uniformly distributed on the upper edge of the guide sleeve (106) along the circumferential direction, and each protruding block penetrates into the shell through a gap on the shell; The position constraint mechanism comprises a force application ring (111) and a return spring (112), wherein a stop block (110) matched with each deflector rod (113) is arranged at the upper edge of the force application ring (111), when the guide sleeve (106) is installed at the machine shell, the force application ring (111) is fixedly connected at the upper edge of each protruding block, and the return spring (112) is arranged between the force application ring (111) and the machine shell, and when each deflector rod (113) passes over the stop block (110), the guide sleeve (106) is reset.
  6. 6. The pulverized coal sampling device for a thermal power plant according to claim 5, wherein the contact portions between each shift lever (113) and each stopper (110) are provided with rounded corners.
  7. 7. The pulverized coal sampling device for a thermal power plant according to any one of claims 1 to 5, further comprising a bushing (115), wherein the upper end of the bushing (115) is connected to the housing, the drill rod (107) is arranged in a sleeve-like manner through the bushing (115) and the guide sleeve (106), and the bushing (115) and the guide sleeve (106) are in clearance fit.
  8. 8. The pulverized coal sampling apparatus as set forth in claim 7, wherein a bottom edge of the bushing (115) is provided in a flare shape, and an outer wall of the flare portion is fitted with an inner wall of the bushing (115).
  9. 9. The pulverized coal sampling device for a thermal power plant according to any one of claims 1 to 5, further comprising annular drilling teeth (116), wherein hanging lugs (118) are arranged at the upper edge of the annular drilling teeth (116), and the hanging lugs (118) of the annular drilling teeth (116) are connected to the edge, close to the bottom, of the guide sleeve (106) through constraint blocks (117); When sampling is performed, the bottom edge of the guide sleeve (106) is abutted against the annular drilling teeth (116); In a natural state, the bottom edge of the guide sleeve (106) and the annular drilling teeth (116) are in a disengaged state.
  10. 10. The pulverized coal sampling device of a thermal power plant according to claim 9, characterized in that the bottom edge of the annular drilling teeth (116) is arranged in a wedge shape.

Description

Pulverized coal sampling device of thermal power plant Technical Field The invention relates to the field of coal detection, in particular to a pulverized coal sampling device of a thermal power plant. Background Among the applications of coal, thermal power generation is one of the most important consumption fields. The modern large-scale thermal power generation boiler generally adopts a pulverized coal suspension combustion technology, namely, coal blocks are not directly combusted, raw coal is ground into superfine pulverized coal, and then the superfine pulverized coal is sprayed into a hearth for combustion. The root cause is that the pulverized coal has a huge specific surface area, and can be fully mixed with air, so that severe combustion with extremely high efficiency is realized, and the method is a core process requirement for ensuring the power generation efficiency and the stable operation of the boiler. Therefore, the quality monitoring and sampling analysis of the pulverized coal entering the furnace have direct production guidance significance. However, current sampling work for coal yards is severely dependent on lagging manual approaches. Operators usually need to use simple tools such as shovels, drill rods and the like to excavate and collect, the whole process is laborious and time-consuming, and the natural accumulation state of the coal seam is easily damaged. In the sampling and dumping processes, dust emission of coal dust is serious, and the working environment is quite dirty. More importantly, the extensive manual mode can hardly systematically complete uniform sampling at a specific depth in a sampling area to be analyzed. It is difficult for the operator to precisely control the depth and cross section of each sample. This results in the inability of the final combined sample to represent the overall coal quality distribution of the target depth layer within the zone, losing the analytical value of "zone stratification representativeness", directly affecting the representativeness and accuracy of the subsequent coal quality detection results. Therefore, there is a strong need in the art for an automated device that can replace heavy manual work, operate cleanly, and accurately and conveniently achieve uniform sampling of pulverized coal deep-layer fixed points. Disclosure of Invention In order to overcome the defects in the prior art, the invention provides the pulverized coal sampling device of the thermal power plant, which can accurately sample different depths in a sampling area and is convenient to use. The technical scheme of the invention is as follows: a pulverized coal sampling device of a thermal power plant, comprising: a housing; the power source is arranged at the machine shell; The power distribution mechanism is provided with a first power output end and a second power output end, and the power input end of the power distribution mechanism is connected with the output shaft of the power source; The drill rod is rotationally connected with the shell, and one end of the drill rod is connected with a first power output end of the power distribution mechanism so as to acquire rotary driving force; the guide sleeve is connected with the shell through the axial sliding mechanism and the position constraint mechanism, the axial sliding mechanism is used for constraining the movement direction of the guide sleeve, the position constraint mechanism is used for constraining the travel of the guide sleeve, the guide sleeve is in sleeve joint arrangement with the drill rod, one end of the guide sleeve is connected with the second power output end of the power distribution mechanism so as to acquire axial impact force, and a discharge hole is further formed in the side wall of the guide sleeve so as to collect pulverized coal screwed up by the drill rod. Preferably, the power distribution mechanism includes: The transmission main shaft is rotationally connected with the support, a deflector rod is arranged on the side portion of the transmission main shaft, the top end of the transmission main shaft is a power input end, the bottom end of the transmission main shaft is a first power output end, and the deflector rod is a second power output end. In any of the above schemes, preferably, two shift levers are provided, and the two shift levers are axisymmetrically distributed along the transmission main shaft. In any of the above schemes, preferably, the axial sliding mechanism comprises a linear bearing, the linear bearing is fixedly connected with the casing, and the guide sleeve is inserted into the linear bearing. In any of the above schemes, preferably, a plurality of protruding blocks are uniformly distributed on the upper edge of the guide sleeve along the circumferential direction, and each protruding block penetrates into the casing through a gap on the casing; The position constraint mechanism comprises a force application ring and a reset spring, wherein a stop block