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Scraper conveyor can only be under normal clearance and high quality scraper chain

Number of visits: Release date: 2020-05-25 09:51 source: admin

For the scraper conveyor, it is very important to adjust the appropriate gap between the scraper and the machine bottom plate and correctly judge the replacement of the scraper chain, because it will affect the service life of the equipment and the conveying efficiency. Scraper conveyor can only be used under normal clearance and high quality scraper chain.

Obviously, the gap between scraper conveyor chain and machine slot bottom plate is too small, clinker is easy to be caught between scraper and machine slot, resulting in damage of scraper or machine slot floor, and even chain breaking accident in serious cases. However, if the clearance is too large, the conveying efficiency will be reduced, which is not desirable.

Because most of today's mechanical equipment is powered, they are equipped with over-current protection devices, Scraper conveyor No exception. Reasonable over-current protection can prevent equipment damage due to over-current and protect the normal operation of scraper conveyor.

The overload of scraper conveyor is divided into continuous overload and short-term or instantaneous overload. The former is not allowed and cannot last for a long time. The two cases are more complicated because some temporary short-term overload failures often occur. However, if it is not handled in time, it will develop into continuous overload, or scraper conveyor will return to normal operation immediately after self exclusion.

In other words, the conveyor does not have to stop working in this case. However, the over-current protection cannot be judged and identified. Once the load current rises to the specified limit value, the scraper conveyor will stop working immediately to control the continuous overload of the scraper conveyor. The consequences also limit the possibility of translating into good results.

In the actual production, due to the over-current protection of scraper conveyor, many unnecessary downtime can be caused, which can not eliminate the fault of scraper chain in the operation process, which will greatly reduce the transportation efficiency of the equipment.

However, sometimes the over-current protection in scraper conveyor can not effectively protect the equipment, especially when the equipment fails. It can be seen that adding motor over-current protector can not completely protect scraper conveyor, and has greater limitations.

Therefore, the gap size between scraper conveyor chain and machine trough bottom plate should depend on clinker particle size. The relevant calculation formula is a > D / 25, where a represents the gap between the scraper and the bottom chute of the scraper conveyor. D is the large size of clinker, so adjust the gap to this range as much as possible.

The scraper chain of scraper conveyor is damaged. Wear is one of the main reasons. When the equipment is running, the chain will stretch elastically. When it is empty, it returns the original length. In the long run, it will wear. The wear between the links will increase the pitch of the chain, and the external dimension of the link will remain unchanged.

Under normal circumstances, it is acceptable to increase the chain pitch of scraper conveyor by 2.5%, but if it exceeds 2.5%, it is necessary to evaluate whether to replace the chain. If the working surface is near the end, the wear of the chain should not cause problems; if the working surface is still very long, a new chain needs to be assembled to reduce the risk of chain failure.



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