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CN-121972394-A - Coal light-load screening device for thermal power generation of screen body floating connection structure

CN121972394ACN 121972394 ACN121972394 ACN 121972394ACN-121972394-A

Abstract

The invention relates to the technical field of coal block screening equipment, in particular to a coal light-load screening device for thermal power generation of a screen body floating connection structure, which comprises a main frame, wherein the top of the main frame is connected with a supporting frame through a buffer component, a screening mechanism is rotatably assembled in the supporting frame and comprises a fixed ring, a plurality of filter rod units parallel to the axis of the fixed ring are arranged in an inner circumference array of the fixed ring, each filter rod unit comprises a fixed rod connected with the fixed ring, an adjusting rod is slidably arranged in the fixed rod, and a driving groove is formed in one side opposite to the adjusting rod. According to the invention, floating connection is realized through the main frame, the buffer component and the support frame, the fixed ring and the filter rod unit are used for improving screening efficiency, the push rod component can be used for adjusting the distance between the filter rods, the butt joint component is automatically clear and blocked, all the components are cooperatively matched, accurate and stable screening is ensured, the light load requirement is met, and the maintenance cost is reduced.

Inventors

  • LIAO HANG
  • CHENG BO
  • PAN CHAO
  • LI GUANYANG
  • TAO JUNLONG
  • ZHANG JIANHONG
  • ZHOU JIAN
  • ZHANG XIAOFENG

Assignees

  • 四川广安发电有限责任公司

Dates

Publication Date
20260505
Application Date
20260407

Claims (9)

  1. 1. The coal light-load screening device for the thermal power generation of the screen body floating connection structure is characterized by comprising a main frame (1), wherein the top of the main frame (1) is connected with a support frame (2) through a buffer assembly (11), a screening mechanism (3) is rotatably assembled in the support frame (2), the screening mechanism (3) comprises a fixed ring (31), and a plurality of filter rod units (32) parallel to the axis of the fixed ring (31) are arranged in an inner circumferential array of the fixed ring (31); The filter rod unit (32) comprises a fixed rod (321) connected with a fixed ring (31), an adjusting rod (322) is arranged in the fixed rod (321) in a sliding mode, a driving groove (3221) is formed in one side, opposite to the adjusting rod (322), of the fixed rod (321), a push rod assembly (323) is arranged between the adjusting rods (322), a push bolt (324) is arranged at the position, corresponding to the driving groove (3221), of the outer portion of the push rod assembly (323), one end of the push bolt (324) is slidably arranged in the driving groove (3221), a butt joint assembly (21) is arranged at the position, corresponding to the push rod assembly (323), of the outer wall of the fixed rod (321), and a sliding port (3211) is formed in a penetrating mode.
  2. 2. The coal light-load screening device for thermal power generation of a screen body floating connection structure according to claim 1, wherein the butt joint assembly (21) comprises a fixed plate (211) fixedly connected with a support frame (2), a mounting shell (212) is arranged between the fixed plates (211), a butt joint opening (213) is formed in one side, close to the screening mechanism (3), of the mounting shell (212), a butt joint block (214) which is obliquely arranged is slidably arranged in the mounting shell (212), one end of the butt joint block (214) extends into the butt joint opening (213), the other end of the butt joint block (214) is connected with a first elastic piece (215), and one end of the first elastic piece (215) is connected with the mounting shell (212).
  3. 3. The light-load coal screening device with the screen floating connection structure for thermal power generation of claim 1, wherein the push rod assembly (323) comprises a first rod (3231), a movable block (3232) and a second rod (3233), the movable block (3232) is slidably mounted between the first rod (3231) and the second rod (3233) at a position corresponding to the butt joint assembly (21), a butt joint bolt (32322) is arranged at the top of the movable block (3232), and the top end of the butt joint bolt (32322) penetrates through the sliding port (3211) to extend into the butt joint assembly (21).
  4. 4. The light-load coal screening device for thermal power generation with the screen body floating connection structure, which is characterized in that a limiting groove (32311) is formed in one end, close to a movable block (3232), of the first rod (3231), a butt-joint sliding block (32321) is arranged at a position, corresponding to the limiting groove (32311), of the movable block (3232), the butt-joint sliding block (32321) is slidably mounted in the limiting groove (32311), a movable opening (32331) is formed in one end, corresponding to the movable block (3232), of the second rod (3233), and one end of the movable block (3232) is slidably connected with the inner wall of the movable opening (32331).
  5. 5. The light-load coal screening device for thermal power generation with the screen floating connection structure according to claim 4, wherein a first butt joint surface (32332) and a top surface (32333) are arranged in the movable opening (32331), an extrusion surface (32324) is formed in a position, corresponding to the first butt joint surface (32332), of the outer wall of the movable block (3232), an extrusion surface two (32325) is formed in a position, corresponding to the top surface (32333), of the outer wall of the movable block (3232), and an elastic piece three (32323) is arranged on one side of the movable block (3232).
  6. 6. The light-load coal screening device for thermal power generation with the screen body floating connection structure according to claim 3, wherein an abutment (32334) is arranged at the other end of the second rod (3233), and an elastic piece IV (32335) is arranged in the abutment (32334).
  7. 7. The light-load coal screening device with the screen body floating connection structure for thermal power generation is characterized in that the fixed ring (31) comprises a first ring body (311), a second ring body (313) and a third ring body (314) which are coaxially arranged, two ends of the fixed rod (321) are respectively connected with adjacent ring bodies, pushing assemblies (312) are arranged in the first ring body (311), pushing rings (316) are slidably assembled in the second ring body (313) and the third ring body (314), the filter rod units (32) are correspondingly arranged between the first ring body (311), the second ring body (313) and the third ring body (314) of the fixed ring (31) respectively, the fixed ring (31) is rotatably arranged in the support frame (2), and the pushing rod assemblies (323) are respectively connected with the pushing rings (316) and the pushing assemblies (312).
  8. 8. The light-load coal screening device for thermal power generation with the screen body floating connection structure according to claim 7, wherein an elastic piece II (3142) is arranged in the ring body III (314), one end of the elastic piece II (3142) is connected with the pushing ring (316), mounting openings I (315) are formed in positions, corresponding to the adjusting rods (322), of the outer walls of the ring body I (311), the ring body II (313) and the ring body III (314), and two ends of the adjusting rods (322) extend into the mounting openings I (315) and are in sliding connection with the mounting openings I.
  9. 9. The light-load coal screening device with the screen floating connection structure for thermal power generation of claim 8, wherein the pushing assembly (312) comprises a first driving ring (3121) rotatably installed inside a first ring body (311), a second driving ring (3122) is slidably installed inside the first ring body (311) at a position close to the first driving ring (3121), wedge-shaped surfaces (3123) are respectively formed on one surface, close to the first driving ring (3122), of the second driving ring (3122), a toothed ring first (3124) is arranged on one side, far from the first driving ring (3121), of the first driving ring, a second driving gear (3111) is rotatably installed inside the first ring body (311) at a position close to the toothed ring first (3124), a second driving motor (3112) is arranged outside the first ring body (311) at a position close to the second driving gear (3111), and an output end of the second driving motor (3112) penetrates through the first ring body (311) to be connected with the second driving gear (3111).

Description

Coal light-load screening device for thermal power generation of screen body floating connection structure Technical Field The invention relates to the technical field of coal block screening equipment, in particular to a coal light-load screening device for thermal power generation of a screen body floating connection structure. Background In a coal conveying system of a thermal power plant, coal screening is a key pretreatment link for guaranteeing stable combustion of a boiler and safe operation of a pulverizing system, and the screening effect directly influences the power generation efficiency and the equipment operation and maintenance cost. Bulk coal, gangue and impurities are mixed in raw coal, if the raw coal directly enters the subsequent process without classification screening, the belt conveyor is easy to tear, powder making equipment is blocked, meanwhile, the coal with uneven granularity can cause insufficient combustion of a boiler, increase energy consumption and fly ash carbon content, and also can cause potential safety hazards such as hearth coking, heating surface abrasion and the like. At present, the existing coal screening device for thermal power generation still has a plurality of technical defects, and is difficult to adapt to the core requirements of light load, low crushing and high-efficiency screening. Firstly, most devices adopt a structure of rigidly connecting a screen body and a frame, vibration impact generated by rotation of a screening mechanism during working cannot be effectively resolved, equipment part abrasion can be aggravated, the service life of the device is shortened, severe rigid collision between coal materials and the screen body and between the coal materials and a filter rod can be caused, excessive crushing of the coal materials is caused, a large amount of superfine coal powder is generated, the designed combustion working condition of a boiler is damaged, dust pollution and dust removal system load can be aggravated, and even dust explosion risks are promoted. Secondly, the filter rod interval of current device is mostly fixed setting, or adjusts that the structure is complicated, the precision is low, can't adapt to the screening demand of different granularity coal materials for thermal power generation in a flexible way, and the commonality is relatively poor. Disclosure of Invention The invention discloses a coal light-load screening device for thermal power generation with a screen body floating connection structure, which aims to solve the problems of high rigid connection vibration, high coal breakage rate, inconvenient adjustment of filter rod spacing and low screening precision of the conventional coal screening device in the background art. In order to solve the technical problems, the invention adopts a technical scheme that the coal light-load screening device for the thermal power generation comprises a main frame, wherein the top of the main frame is connected with a supporting frame through a buffer assembly, a screening mechanism is rotatably assembled in the supporting frame and comprises a fixed ring, and a plurality of filter rod units parallel to the axis of the fixed ring are arranged in an inner circumference array of the fixed ring; The filter rod unit comprises a fixed rod connected with a fixed ring, an adjusting rod is slidably mounted in the fixed rod, a driving groove is formed in one side, opposite to the adjusting rod, of the fixed rod, a push rod assembly is arranged between the adjusting rods, a pushing bolt is arranged at the position, corresponding to the driving groove, of the outer portion of the push rod assembly, one end of the pushing bolt is slidably mounted in the driving groove, a butt joint assembly is arranged at the position, corresponding to the push rod assembly, of the outer wall of the fixed rod, and a sliding port is formed in the position, corresponding to the butt joint assembly, of the outer wall of the fixed rod in a penetrating mode. The invention further provides that the butt joint assembly comprises a fixed plate fixedly connected with the support frame, a mounting shell is arranged between the fixed plates, a butt joint opening is formed in one side, close to the screening mechanism, of the mounting shell, a butt joint block which is obliquely arranged is slidably arranged in the mounting shell, one end of the butt joint block extends into the butt joint opening, the other end of the butt joint block is connected with a first elastic piece, and one end of the first elastic piece is connected with the mounting shell. The invention further provides that the push rod assembly comprises a first rod, a movable block and a second rod, wherein the movable block is slidably arranged between the first rod and the second rod and corresponds to the position of the butt joint assembly, the top of the movable block is provided with a butt joint bolt, and the top end of the butt joint bolt penetrates through