New structure of mill main engine

A new type of main engine technology, applied in the direction of grain processing, etc., can solve the problems of long downtime of the main mill, affecting the production efficiency of the mill, and complicated maintenance of the main mill, so as to shorten the maintenance process, ensure stability, increase The effect of service life

Pending Publication Date: 2019-10-15
广西桂林航大重工机械有限公司
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AI-Extracted Technical Summary

Problems solved by technology

[0007] To sum up, the overhaul of the main mill is complex, cumbersome and labor-intensive, resulti...
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Abstract

The invention discloses a new structure of a mill main engine. The structure comprises a base, a cover cylinder and a grader. An air returning box is arranged on the base in a surrounding manner, a ring plate is arranged on the top of the air returning box, the cover cylinder comprises two semi-circle cover bodies, the two semi-circle cover bodies are connected with a locking mechanism I through ahinge mechanism, lower circle openings of the two semi-circle cover bodies are arranged on the ring plate in a sleveing manner and subjected to banding through a hoop, the grader is supported and mounted through a rack, a lower opening of a cover shell of the grader is in abut joint with upper circle openings of the two semi-circle cover bodies, and axial fastening is achieved through locking mechanisms II arranged between the grader and the two semi-circle cover bodies. A portal frame is arranged beside the cover cylinder, and is arranged on horizontal guide rails, on the two sides of the cover cylinder, on the rack in a rolling manner, the span of the portal frame is larger than the diameter of the cover cylinder, the height of the portal frame is smaller than the lower opening of the cover shell of the grader and higher than a grinding roller frame in the cover cylinder, a grinding ring can be easily replaced, a grinding roller assembly can be easily overhauled, the overhauling work proceed can be greatly shortened, the shutdown time of a pulverizer is reduced, and the production efficiency is improved.

Application Domain

Grain treatments

Technology Topic

PulverizerEngineering +4

Image

  • New structure of mill main engine
  • New structure of mill main engine
  • New structure of mill main engine

Examples

  • Experimental program(1)

Example Embodiment

[0028] The technical solutions of the present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.
[0029] The new structure of the mill main engine of the present invention includes a base, a return air box 3, a cover cylinder 1 and a classifier 2, the base is installed on the base 16, and the return air box 3 is supported and installed on the base 16 by a bracket and enclosed in the On the base, the tangential air inlet 17 on the air return box 3 communicates with the evenly distributed air inlets on the side of the base. One side of the inner ring of the ring plate 3-2 is installed on the top of the base by screws (coaxial with the hole of the base), and one side of the inner ring of the lower ring plate 3-3 is installed on the step at the bottom of the base by screws (coaxial with the base hole). hole coaxial), the coaming plate 3-4 is coaxially welded between the outer ring side of the upper and lower ring plates 3-2 and 3-3, and the upper circumference of the coaming plate 3-4 is evenly distributed with openings that can be closed or Opened air supply observation port 5, ribs 3-5 connected to the upper and lower ring plates 3-2, 3-3 are evenly distributed on the outer surface of the coaming plate 3-4 (avoiding the air supply observation port 5) , the upper ring plate 3-2 (near the inner ring) is provided with a coaxial ring plate 3-1 (vertically upward), and the lower opening of the cover tube is set downward on the ring plate 3-1; the cover tube 1. There is a grinding roller assembly installed on the main shaft through the grinding roller frame. The main shaft is installed in the center of the bottom of the seat hole of the base through the lower support (bearing mechanism), and a grinding ring is installed on the seat hole of the base. The grinding rollers evenly distributed on the circumference of the ring and the grinding roller assembly form a grinding area. The casing of the classifier 2 is clamped in the bayonet of the classifier inspection platform 11, and the classifier inspection platform 11 is fixedly installed on the On the top of the frame 7 (frame structure) welded by section steel, guardrails 12 are provided around the maintenance platform 11 of the classifier, and the entrance and exit of the front side of the guardrail 12 are provided with an escalator 13 installed on the frame 7, and the classifier The lower opening of the casing 2 is docked with the upper opening of the cover cylinder 1, and the frame 7 is arranged on the base 16, and the four-sided frame bodies of the frame 7 are respectively located in front of the installation structure (the base, the return air box 3 and the cover cylinder 1). side, back, left and right, such as figure 1 , figure 2 , image 3 shown.
[0030] Described cover cylinder 1 comprises left half circle cover body 1-1 and rear half circle cover body 1-2, the left corresponding end of front half circle cover body 1-1 and rear half circle cover body 1-2 is connected by hinge mechanism 14, front half circle cover body The right corresponding ends of the body 1-1 and the rear half-circle cover body 1-2 are connected by a locking mechanism I15, the rear half-circle cover body 1-2 is centered with a feed inlet, and the front half-circle cover body 1-1 is centered with the following The observation door 18 that hinge structure is installed; Described hinge mechanism 14 comprises rotating shaft, and described rotating shaft is installed on the back semicircle cover body through the upper and lower axle seat at the left end place of rear semicircle cover body, and the rotation axis passes through upper, middle and lower The bolt and nut assembly is connected to the front semi-circular cover body 1, and the locking mechanism I15 includes upper, middle and lower triangular nut and bolt assemblies; in the locked state, the lower circular openings of the two semi-circular cover bodies are set on the ring plate 3-1, There are upper and lower hoops 6 at the lower round openings of the two half-round hoods, and the two hoops 6 tighten the lower round mouths of the two half-round hoods on the ring plate 3-1 so as to realize the gap between the cover tube 1 and the base. There is a sealing ring 4 between the lower circular openings of the two semi-circular covers and the socket surface of the ring plate 3-1, and the upper circular openings (flange type) of the two semi-circular covers and the lower cover of the classifier 2 The mouth (flange type) is coaxially butted, and the locking mechanism Ⅱ8 (hook-type locking piece) arranged evenly on the circumference is axially fastened between the two, such as figure 1 , image 3 , Figure 4 shown.
[0031] The front and rear frame bodies of the frame 7 are respectively provided with left and right guide rails 10 on the middle beams of the front and rear frame bodies, and the two guide rails 10 are rollingly equipped with a gantry 9, and the front and rear beams of the gantry 9 are A gourd crane is provided, the span of the gantry 9 is larger than the diameter of the cover tube 1, and the height of the gantry 9 is higher than the grinding roller frame in the cover tube 1 and lower than the lower opening of the classifier 2. In the case of cylinder 1, the gantry 9 can enter and exit below the lower opening of the casing of the classifier 2 (that is, above the grinding roller frame), such as figure 1 , figure 2 , image 3 shown.
[0032] When the main machine of the mill is in the grinding state, the front semi-circular cover 1-1 is closed and locked on the rear semi-circular cover 1-2, and the front semi-circular cover 1 and the rear semi-circular cover 2 are installed between the return air box 3 and the classifier 2 During this period, the material enters the cover cylinder 1 through the feed port and falls to the grinding area. Open the observation door 18 to observe the operation of the grinding roller device. The gap between the right opposite ends is closed by respectively provided sealing strips to prevent dust from flying out of the cover tube 1 .
[0033] When the grinding roller device needs to be maintained and overhauled, when the main machine of the mill is in a stopped state, release the locking of the front half-circle cover 1-1 by the hoop 6 and the locking mechanism I15, and open the front half-circle cover 1-1 to directly Facing the grinding roller device for inspection and maintenance.
[0034] When it is necessary to replace the grinding ring, release the locking of the front semi-circular cover 1-1 by the hoop 6 and the locking mechanism I15 when the main machine of the mill is in the stop state, and remove the front semi-circular cover 1-1 and the rear semi-circular cover Body 1-2, push the gantry 9 to the bottom of the lower opening of the classifier 2 (that is, above the grinding roller frame), and use the gourd to lift the grinding ring, and this operation can complete the replacement of the grinding ring.

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