JPH0420509Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a cleaner for removing deposits adhering to the feed chute of a crusher for coal, ore, rock, coke, etc.

Conventional technology Pulverization of coal, ore, rock, coke, clinker, etc. Taking coking coal in a coke factory as an example, in order to produce high-strength homogeneous coke, the coking coal must be crushed before charging into the coke oven. The grain size of the coking coal is adjusted through blending and pulverization to create a coal blend that is optimal for coke production.

The raw coal is pulverized using a repulsion type pulverizer or the like, and the pulverized particle size at this time is pulverized to about 80 to 90% of 3 mm or less, taking into account the bulk density.

The various raw material crushers generally have a rotary feeder 3 at the top, as shown in FIG.
The raw material conveyed by a belt conveyor (not shown) naturally falls into the hopper 14 of the rotary feeder.
The damper 16 is opened by the rotation of the feeder roller 15 to cut out the raw coal, which falls onto the supply chute 2 of the pulverizer 1 to supply raw coal to the pulverizer 1.

As described above, since the raw material falls onto the supply chute via the rotary feeder, the raw material adheres and accumulates on the supply chute 2, and deposits 20 are generated. The formation of this deposit obstructs the uniform supply of raw materials and significantly reduces the efficiency of the grinding operation.

Therefore, in the past, an operator inserted a spear-shaped cleaning rod into the deposit-generating portion of the supply chute to knock off the deposits. However, the manual work using this cleaning stick varies from person to person, and it is difficult to completely scrape off the dirt, making it difficult to improve efficiency.

Therefore, it is desirable to find a way to easily and reliably remove the deposits on the supply chute. For example, a steam jacket is installed on the back side of the supply chute to preheat the chute surface to prevent material deposits from attaching to the supply chute. etc. have been developed.

Problems that the invention aims to solve As mentioned above, the method of manually scraping off the deposits on the supply chute with a cleaning stick does not improve efficiency, and the method of preheating with steam increases the maintenance cost of the equipment and also removes the deposits. There are drawbacks such as insufficient prevention effects.

In view of the current situation, it is an object of this invention to provide a cleaner that can easily scrape off deposits on a supply chute using mechanical force and is highly effective in preventing deposits.

Means for Solving the Problems This invention provides a raw material crusher in which a supply chute is provided at an angle between a rotary feeder provided above the crusher and a repulsion blade rotating body of the crusher.
A deposit cleaner in which a plurality of scraping members are vertically arranged facing the deposit generation area of a supply chute, attached to a rectangular support shaft, and provided so as to be freely traverse in the width direction along the supply chute surface. The gist is:

Function This invention provides a cleaner consisting of a plurality of scraping members that extend across the width of the supply chute, facing the deposit generation area of the supply chute.
The scraping operation of this cleaner can scrape off the entire surface of the chute with a short reciprocating motion that is a fraction of the width of the chute. That is, scraping can be repeated in short cycles.

Therefore, if the cleaner is operated continuously while the raw material is falling, there is no room for the raw material to adhere and all of the raw material is scraped off, thereby preventing the generation of deposits.

Furthermore, if the actuator is operated intermittently, the generated deposits can be reliably scraped off without resistance by short cycle scraping operations.

Example An embodiment of this invention will be described based on the drawings.

The crusher 1 consists of a rotary body 11 having a large number of repulsion blades 12 arranged thereon, and a collision blade 13 opposing each other above the rotating body 11, and a hopper 1 installed diagonally above the crusher 1.
A feed chute 2 is installed at an angle between the feeder 4 and the rotary feeder 3 consisting of feeder rollers 15.

A rectangular support shaft 5 attached between the side walls 17 of the machine frame is horizontally installed opposite to the upper surface of the supply chute 2, and three support arms 6 are arranged at regular intervals and one end side (the second (on the right side in the figure) are arranged with an interval equal to the movement length of the piston stroke of the cylinder 7 (to be described later), and are loosely fitted to the support shaft 5, and spacer plates 18 are arranged so as to maintain a constant interval between each support arm 6. is provided. A scraping member 4 is attached to each support arm 6. This scraping member 4 is attached to the lower end of the support arm 6, and is made of a chevron-shaped member having a length that reaches the lower end of the supply chute 2, with its ridge line 4-1 facing outward, and the edges of the sloped surfaces on both sides. is attached so that it is in light contact with the supply chute surface.

A bracket 10 is provided on the outer support arm 6 to project outward, and a connecting rod 9 connected to the tip of a piston 8 of a cylinder 7 attached to a mounting member 19 provided on the machine frame is connected to the bracket. 10
is connected to the supply chute via a pin and moves back and forth on the supply chute surface by the movement length of the piston stroke due to the operation of the cylinder 7.
It is configured to repeat the operation of moving the scraping member 4 to the position shown in .

Now, the operation of the rotary feeder 3 and the crusher 1 is started, and the cylinder 7 is operated intermittently using a timer or the like, and the raw material is dropped from the hopper 14 onto the supply chute surface while moving the scraper. Then, even if a part of the raw material adheres to the supply chute surface, it is scraped off by the scraping member 4 that moves intermittently, so the raw material is blown off by the repulsion blade 12 without creating any deposits, and is prevented from colliding with the feed chute surface. It collides with the blade 13 and is crushed.

Note that the intermittent operation of the scraper can be freely adjusted by changing the time setting of a timer or the like.

Therefore, if the interval between operations is lengthened, a certain amount of deposits may be formed on the supply chute, but this can also be sufficiently scraped off.

When scraping off the deposits, the deposits come into contact with the repulsive blade 12 and are repelled, so that a pushing up force acts on the scraping member 4. However, since the scraping member 4 of this invention uses a highly rigid chevron-shaped member and the support shaft is made of a square piece, reliable scraping can be performed without lifting up. Also, the scraping member 4
Since it is chevron-shaped, raw materials falling onto the supply chute will not adhere to the scraping member.

Effects of the invention In this invention, a plurality of scraping members are arranged on the supply chute provided between the rotary feeder and the crusher, and are disposed oppositely in the width direction of the chute, so that each scraping member Scraping is carried out by partially sharing the supply chute surface, and it is possible to scrape off deposits easily and reliably. In addition, the scraping member is made of a highly rigid chevron-shaped member and has high deformation resistance, so the scraper has excellent durability and is extremely economical.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram showing a cross section of the main parts of a crusher equipped with a deposit cleaner according to this invention, and Figure 2
The figure is a front view of the deposit cleaner of this invention.
The figure is an explanatory diagram showing the formation of deposits in a conventional crusher. 1... Grinding machine, 2... Supply chute, 3... Rotary feeder, 4... Scraping member, 5...
Support shaft, 6...Support arm, 7...Cylinder, 8...
... Piston, 9 ... Connecting rod, 10 ... Bracket, 11 ... Rotating body, 12 ... Repulsion blade, 13 ...
Collision blade, 14...hopper, 15...feeder roller.

Claims (1)

[Scope of utility model registration request] In a pulverizer in which a supply chute is installed at an angle between a rotary feeder installed above the pulverizer and a repulsion blade rotating body of the pulverizer, a plurality of scrapings are performed opposite to the deposit generation area of the supply chute. A cleaner for deposits on a supply chute of a crusher, in which members are arranged vertically and attached to a rectangular support shaft so as to be freely traversable in the width direction along the surface of the supply chute.