cs cone crusher safety precautions

precautions for startup and shutdown of cone crusher

Many users do not pay attention to the correct opening and closing of the cone crusher, which causes a series of problems in the later use of the cone crusher, which affects the production efficiency of the production line. The life and efficiency of the equipment can only be guaranteed if the importance of the power switch is properly recognized. Today we will learn how to properly operate the power switch of the cone crusher.

2 Make sure that there is no previously unbroken material in the crushing cavity of the cone crusher. If there is any residual material, it should be cleaned out in time before starting the machine, otherwise it may damage the machine and even cause injuries.

3 Regularly check the lubricating oil in the oil storage tank of the cone crusher. Insufficient oil quantity must be replenished in time. Before starting, start the oil pump. Wait for oil return in the oil return pipe and the oil pressure gauge pointer is normal to start the crusher equipment. Need to heat the oil pump.

1 Cone crusher should be carried out in sequence during the shutdown process. Stop feeding and wait for all the materials to be crushed by the cone crusher before closing the feeder, crusher and conveyor.

3 It should also be noted that the lubricant pump and cooling system can only be stopped after the crusher is stopped. In the winter, after the cooling system is turned off, the cooling water must be drained to prevent freezing and damage the bearings.

The above is what SBM provides you with matters needing attention when turning on and off the cone crusher. SBM is a professional cone crusher research and development manufacturer. If you have related purchase intentions or other questions, you can contact us at any time and we will be happy to help you.

cone crusher installation steps and precautions | hxjq

The cone crusher plays an important role in the fine crushing process of the industry. The safe and stable operation of the cone crush has a great relationship with the correct installation of the equipment. Next, the post will share the basic installation steps and precautions of the cone crusher.

Placement of equipment: The equipment needs to be pre-embedded according to the basic diagram (according to the user's requirements, the anchor bolts can not be used, but the pre-embedded iron should be adopted).

Strict horizontality should be maintained when installing the chassis. Before installation, the corresponding position of the chassis vibration damping pad should be ground and leveled, and the basic horizontality should be checked with a level meter.

The exciter components include three eccentric blocks. The upper and lower eccentric blocks and the sleeve with corresponding keys. The sleeve has three sets of key grooves in different position groups which can be replaced to extend the service life of the sleeve.

There are multiple key grooves on the outer side sector of the three eccentric blocks. The long key fixes the middle eccentric block by the force of the upper and lower eccentric blocks. When using the machine, the relative position of the middle eccentric block and the upper and lower eccentric blocks can be changed as needed to obtain different crushing forces.

When installing and removable the eccentric block, the wedge iron with a small angle can be used to open a small space at the eccentric block which is convenient for installing and removable next time.

Use high-strength steel bolts to lock eccentric block tightly, and sink the nut into the open slot on one side. If other high-strength bolts can only be used on-site due to limited conditions, it must be ensured that the bolts do not rotate 90 after sinking. Otherwise, the thin iron plates should be welded on both sides of the nut to make the nut locked tightly by the open slot.

Install the two lock pieces which should be close to the eccentric block. If there is a gap between its upper surface and the upper surface of the axial groove of the sleeve, a thin iron plate can be placed under the locking piece to compensate the gap. Then, tighten the bolts and lock them.

To ensure a uniform and fine contact, the sub-bearing spherical tile should be scraped to work in with the mantle steel tile. Ensure that there have 10-15 contact points per 25 mm 25 mm on the outer ring of the spherical tile and that few rings gap are formed in the inner ring.

Place the vibration exciter on the ground and install the mantle bearing on it. Put the flange on the sleeve, and install the taper sleeve and the snap ring into it to ensure that the snap ring fits into the sleeve circumferential grooves and sinks in the step of the taper sleeve.

Slowly lift the mantle bearing so that the exciter is off the ground a little, and successively, repeatedly and symmetrically tighten the 8 bolts on the flange, and then lock the bolts in groups of two with wire.

Place the movable cone on the iron shelf, weld two symmetrical rings on the outer surface of the mantle, and lift the mantle on the movable cone. Install the small liner, the backing ring and the cap nut ( Left-hand thread), then use a special wrench and sledgehammer to tighten the cap nut, and use a feeler gauge to check the gap between the mantle and the movable cone to make sure that it is nearly zero and the circumference is consistent.

When assembling, lift the parts of the movable cone at the cap nut, gently put the main shaft of the movable cone into the sleeve of the exciter parts, and firmly make the spherical surface of the movable cone contact with the spherical surface of the movable cone-bearing to avoid the tapered tongue ring, the outer edge being overhead on the movable cone-bearing and crushing the sealing ring.

The concave and the thread ring contact through the conical surface. When installing, put the concave positive and then put the thread ring on it. Place the flange on the thread ring, and clamp the snap ring to the outer ring of the concave, then repeatedly and symmetrically tighten the bolts one by one.

Determine the relative position of the locking structure and the bearing ring according to the positioning pin, then screw the adjustment ring in, and adjust to the proper position to get the proper discharge opening clearance.

Always ensure that the locking structure is parallel to the bearing ring. Open the high-pressure pump station and adjust the pressure to 13 MPa, then repeatedly and symmetrically screw the ejector pins of the structural jacks one by one.

It is also necessary to adjust the temperature and pressure control system of the lubrication device. By adjusting the pressure and temperature limits, check the reliability of the electrical contact pressure gauge, the temperature gauge and the reliability of the connection with the electric control cabinet to ensure the reliability of the control system.

The parts of the cone crusher will be affected by the harsh working environment when working, and various failures such as wear and breakage may occur, which may even jeopardize the cone crusher. Proper use of the cone crusher and reduce component failure rate have become a concern for every user.

The cone crusher has a complex structure and many components. The main components include mantle, concave, bearing, copper-sleeve and spring. Besides, there are distributor plates, lock nuts and cutting rings, adjustment kits and other accessories.

When installing the equipment, be sure to thoroughly clean all the accessories of the cone crusher, otherwise, the dust will increase the friction of the parts, causing serious wear and tear and resulting in failure.

Pay attention to the lubrication of each part of the cone crusher. Ensure that the parts are well lubricated before running. Check the oil quantity after stopping and add it in time. Also, it is necessary to change the lubricating oil frequently to ensure the quality of the clean lubricating oil and the correct lubrication method.

The cone crusher produced by HXJQ Machinery adopts the best combination of crushing frequency and eccentricity, which makes the material to be fine crushed well. It has a stronger laminating and crushing effect, effectively improving the three-dimensional shape of the material. After the optimized design, the fault-free operation rate exceeds 97% under normal use conditions.

crushing and screening - safety is our #1 priority

Crushing is a dangerous business. Every year there are serious accidents on the job site and some are fatal. Nearly all could have been avoided with better safe work practices. Just this past June, the Mine Safety and Health Administration (MSHA) issued a Serious Accident Alert after a worker was trying to unplug a portable crusher. He attempted to turn the crusher rotor using a pry bar and his foot got caught in the moving part.

Safety is also a numbers game. The more risk your workers are exposed to, the greater the probability you or your staff will be hurt. The more nails you need to pound in a day, the better the chances you will hit your thumb!

Using work arounds such as PPE or Safe Work Practices reduce risk but some risk remains. The smart question is can we completely eliminate this risk? This means taking an engineering or design approach to the elimination of risk in crushing equipment. Before the risk elimination question can be asked, it is important to understand that repairs, maintenance, relocating crushing spreads and unplugging crushers are major causes of injuries and death. Very few are hurt sitting in a centralized control tower or loader cab.

Equipment with common level design means there are fewer conveyors to move and maintain. This reduces the amount of direct contact workers have with the conveyor and the belts, and reduces their risk of injury around them. It also means fewer loads to move and fewer crane lifts when relocating a spread.

Centralized control means there is one button in the control tower that the operator can push to stop the entire plant. This eliminates what we call the Crusher Olympics. When everything needs to stop, your operator isnt sprinting from one machine to the next to shut it down. This is hazardous to the machinery as well as to the operator and other workers.

With centralized control, options such as Emergency Radio Shut down can be implemented. Workers are issued two way radios that have a special emergency button to shut down the whole spread if a worker is in danger.

0 Speed Switch, This means that if a belt stops moving, the 0 Speed Switch will shut down the system which prevents the piling up of materials, another hazard to workers. Hydraulically adjustable conveyors are safer as workers dont have to manually lift conveyors.

Hydraulic grizzlies help crushing operations become more efficient when handling large material at the beginning of the crushing process. But what is often overlooked is how they also contribute to the overall safety of the plant. Because the grizzly removes larger unwanted material from reaching the jaw, the probability of plugging a jaw is reduced. For workers, unplugging a jaw is very dangerous. The grizzly removes the hazards before they become a problem for the jaw crusher, and by doing so, it is improving safety for the workers on site.

Plants with centralized control and one generator require less maintenance than plants with individual motors for every piece (tracked equipment). Reducing maintenance also reduces workers risk as in the example mentioned at the beginning. Many workers are injured while trying to repair the equipment or unplug it when somewhere on the crushing spread. Reducing the need for maintenance then reduces their exposure to risk.

Next Generation Screen Plants which dont require daily greasing. The bearings require grease only once or twice a year which reduces the maintenance time, cost, and risk to workers of being around the equipment.

Moving a common level design crushing spread is a much simpler, easier, and safer process. With the common level design, there is no need for independent conveyors to tie machines together into a crushing operation. The tear down/moving process is easier for workers and reduces their exposure to risks associated with moving and placing independent conveyors. It also reduces the cost of moving as it reduces the number of loads that need to be hauled and speeds up the moving process.

safe and sound: crusher safety : pit & quarry

After securing the chain around the rock in the crushing chamber, a man still in the chamber tells the loader operator to lift the rock. The operator lifts it about three feet into the air when, suddenly, the chain snaps. The rock plunges back into the crusher, missing the mans leg by a matter of inches.

Stories like these involving crusher blockages unfortunately still happen in the industry. Fortunately, this particular event unfolded without an injury. Still, an inch or two one way or another can often make the difference between a safe trip home from work and no trip home at all.

Ive heard and read stories about guys getting killed, says Paul Smith, international marketing manager for Astecs Aggregate and Mining Group. These machines can be deadly. After 20 years of climbing into quarries, I still keep my head on a swivel.

Aggregate producers cant control all of the factors that lead to accidents related to crusher blockages. They can, however, create a work environment and culture that best positions people to return home from work every day.

To Smith, one of the key factors that should be addressed related to crusher safety is a companys workforce. A number of people operating and working around crushing equipment dont have the adequate experience, he says. Producers and recyclers sometimes turn to a transient workforce, and that can present problems.

Our industry is so much about tribal knowledge, Smith says. Were still relying on grandpa to educate a grandson to operate a plant. Or, were adding crews to do short-time jobs and leaning on temporary labor.

Effective operators and contractors tend to put one of their best teams on crusher duty because they realize production starts and stops with these workers. But teams often consist of just two people a loader operator and a plant operator. A third person can make a difference in a number of areas, Smith says.

Its a luxury to have a third guy, but I would argue that having a guy at $15 an hour on the ground pays for itself, Smith says. Maybe this is the new guy whos being trained, or its the boss son. I do know that if that guy prevents a cone crusher from going down and losing a thrust bearing once or twice a year, hes going to pay for himself.

Operating a crusher at 90 percent efficiency versus 80 percent or less will boost a companys bottom line, as well. A third person focused on the crushing operation should improve efficiency, Smith adds.

Use a 30-[in.] x 54-[in.] jaw for example, he says. Take 80 percent of the first number thats 24 in. Thats the lump size you want to put into that crusher. Size the crusher to the size of the material. If you want to have max production, youll pay attention to those rules.

The workforce isnt the only area producers can focus on to avoid crusher blockages and enhance safety related to crushers. The most economical form of crushing is blasting, Smith says, so tighten shot patterns to reduce the amount of oversized material.

Its very practical to have a rock breaker right next to the primary crusher, says Ilkka Somero, Metsos product manager for jaw crushers. Often, you dont even need to break the rocks. Its enough to pull or push the rocks a little bit. Then the materials flow again.

Breakers and hydraulic hammers attached to excavators are also useful to reduce oversized material that can be loaded into a crusher, Somero adds. Smith suggests prepping material with a grizzly feeder if possible, as well.

Still, theres an additional cost associated with a grizzly, he says, as there is with a breaker. A sensor is yet another option for operators to alert themselves when oversized material is present in the feeder. Sensors obviously wont pull a large rock from the crusher for you, though.

They still cause the operator to react, Smith says. The oversized piece of material still has to be extracted. You have to shut down the plant. Its not a perfect solution, but it does help you from plugging the crusher.

Crusher design is another area some manufacturers have focused on to help producers and recyclers avoid blockages and create safer work environments. Sandvik, for example, addresses the blockage issue with its Prisec horizontal shaft impact (HSI) crusher.

According to Rowan Dallimore, an impact crusher manager at Sandvik, the Prisec model can be cleared while the crusher is running. To clear blockages, Dallimore says users stop the feeder and activate the hydraulic system. This lifts either the first or second curtain, allowing a blockage to pass through the crusher.

Once the blockage has been cleared the curtain can be lowered, and they will reset automatically into the previously set position with the hydraulic system switched off and the feed re-started by the crusher, says Dallimore, who estimates that the Prisec clears about 90 percent of blockages without having to stop the crusher. All of this is done with the crusher still running and no operator intervention inside the crusher.

Such a system saves users considerable time, too. Clearing a blocked crusher can take an hour or more, Dallimore says. He estimates that a typical blockage occurs in a stationary plant between five and six times a year, with mobile crushers experiencing even more blockages.

With the recycling business we never know what were going to crush within reason, Dallimore says. When its on a tracked mobile unit, they can be on one site one week and on a completely different site crushing completely different material the next week.

These dont necessarily behave well in a crusher, Smith says. You have the potential to rip belts; for stuff to get hung up at the bottom of the crusher. Or, it might block the discharge part of the crusher and you get buildup in that area.

Every producer is encouraged when they start up a new plant to baby the plant for a period of time, he says. See how the equipment handles that material. If they move it to a second location, things like moisture index change.

Ive read a story about a guy inside an impact crusher on a recycle job, Smith says. The door of the impactor was open, and he was inside it cleaning off some of the asphalt buildup. While in there, he motioned the guy to turn the impactor a little bit. When the guy did that the impactor came up to full speed, and the guy got chewed up in a matter of seconds.

Some of these machines behave like Swiss watches: They require a certain amount of oil, Smith says. We do a lot of things to safeguard and keep bad things from happening, but you still need to find, hire and train the right people. We really need to do that.