Installation safety technical measures and matters of coal mine belt conveyor

1. Please pave the conveyor belt in strict accordance with the belt central line that production department gives. Belt should be paved to make sure flat, straight, and below rollers complete and effective, sweeper should be conformed to the requirements, lining plate of head and tail frame, as well as the guardrail should be complete and reliable.
2. Belt conveyor parts should be transported according to the order of tail frame, middle frame and the head frame, after transporting to the designated location, please put them away as per the transportation order along the roadway.
3. Belt conveyor should be installed according to the order of head frame, middle frame, the tail frame, central line of each pulley belt conveyor should be in a straight line.
4. Belt conveyor parts should meet the requirements, the anchor bolt should be fixed and tighten reliably.
5.All sorts of protection device of belt (Anti-frog protection, speed protection, temperature protection, automatic water spray protection if overheat, deflection protection) after the installation is complete, please test each protection device to make sure they are and sensitive working in good condition.
6. Please set up a bridge for walking where people go cross the belt conveyor frequently.
7.The electric switch protection device must be completed which should be sensitive and reliable ,the protection setting values must conform to the requirements, and keep them from water and rain, there should be enough space for walking and repairing, cable should be placed neatly and in order, communication signal should be in good condition, light and sound should be clear and reliable, control signal device should be complete, sensitive and reliable, explosion-proof lighting lamps and lanterns should be installed.
8. Both the head and tail section of belt conveyor must be equipped with two fire extinguishers and fire sand box which is not less than 0.2 m3.
9. Sweeper installation must meet the production needs. Sweeper and conveyor belt surface must contact well to ensure appropriate tightness and uniform contact, please also make sure both the head and tail section must be equipped with a sweeper.
10. In the section that the roadway changes to slope where belt waves easily, to ensure the belt frame transition smoothly, you can by adjust the supporting leg of conveyor.
11.After completing all the installation ,ensure all rollers and the belt are connected in good condition, then you can commissioning the conveyor.

The daily Care and Maintenance of Motorized Pulley

Are you in trouble with maintaining and repairing motorized pulley when operate the belt conveyor? Come and check this article ,we are sure you will get a satisfied solution ! 
1. In order to create a good condition for normal operation, please check the surrounding environment, fastening bolts, oil leakage, the cable before each start-up.
2. Please start a new pulley with inching running, then it will turn into normal gradually, please check the machine vibration, noise, and temperature heating of each operating component after running for 10 minutes.
3. If oil leakage happens to motorized pulley, please pay attention to check two parts: one is oil seal, check it whether has wear and tear or deformation phenomenon, if any, please replace the cage oil seal timely; the other one is that the air outlet can’t be blocked, if there is blockage, the deposition of dust, grease and sundries shall be removed as soon as possible to ensure smooth access.
4. Regularly check the oil level in the drum is an important part of the daily maintenance, besides, regulation of the oil level height is one of the conditions to ensure the normal operation of the pulley. Inspection methods can be referred according to operation manual.

Highly recommend operation direction graph of steel wirerope in portable belt conveyor

 Mobile belt conveyor is a kind of convenient loading equipment with high efficiency. It can move through wheels, at the same time, the lifting height can be adjusted through the lifting device. It is widely used in warehouse, ports, wharf, station, coal yard, construction sites, etc.

 

The belt width and length can be custom-made according to different requirements. However, we usually need to disassemble the mobile belt conveyor during transportation as the packaging volume is larger. Customer will assemble the mobile belt conveyor in local when they receive it. However, the steel wire rope and conveyor belt installation direction is very important in the whole assembly process. Proper installation direction of the steel wire rope and conveyor belt will affect the lifting and running ability directly, in order to show the installation direction clearly, the following drawing drawn by our engineer is for your reference specially:

In order to use vibrating feeder safely, what should we notice

Are you obtaining the correct methods to operate the vibrating feeder safely? Following mentioned points are the matters users should notice during operation,we are sure you will benefit a lot!  
Firstly, lubrication
Regular maintenance and overhaul are important means of extending the service life of the machine and ensuring the normal work, users should attach importance to it. For lubrication, users should pay attention to the following two points:
1.The machine adopts thin oil splash lubrication, the lubricant should be determined according to the use place, temperature conditions. General used oil is gear oil;
2.Make sure that the exciter in the thin oil is higher than the standard height (filling by joint bend), oil must be replaced every three to six months, when we change the oil, please use clean gasoline or kerosene to clean the oil tank, bearing raceway and gear surface.
Secondly, we need to be aware of safety technology of the following points during use:
1. The machine operators should subject to security technology education;
2. Reinforce all the bolts to prevent the looseness in the operation process;
3. Often view the amplitude of the vibration motor, if it is unusual, immediately stop and repair.
4. When the vibrating feeder is running, it is forbidden to stand beside the machine, touch, adjust, clean or inspect the machine and so on;
5. Equipment should be grounded, wire should be reliably insulated, and packed in a snakeskin tube, we should often check whether the motor wiring wears and leaks of electricity.

How to Clean Stainless Steel Vibrating Sieve Efficiently

Stainless steel vibration sieve will become matt if they are used for a long time, when screening materials with chemical reactions (such as corrosion) ,there would be a passivation film on the surface, it will exist steadily as a shape of the oxide in the nature. In other words, though stainless steel working conditions and oxidation are not the same, they will be oxidized in the end, this phenomenon is often called corrosion. The metal which is exposed in the corrosive environment, it will produce electro-chemical or chemical reaction on the surface of metal, even corrode. Corrosion resistance abilities of vibrating sieve passivation film are weak, due to stress caused by pitting corrosion reactions, it will generate small holes, coupled with the approach of chloridion, it will form a strong corrosive solution, which will accelerate the corrosion reaction rate, as well as the corrosion cracking inside the vibrating sieve, all of these will have a destructive effect on the surface of the stainless steel vibrating sieve.
Therefore, stainless steel surface needs cleaning and maintenance punctually, especially in the corrosive environment to ensure its beautiful surface and extend the use life. It is necessary to pay more attention to not scratch the surface during cleaning, and please avoid cleaning the surface by using liquid bleaching composition or abrasives, steel wool and abrasive stuff, in order to clean up the washing liquid, please clean it with water again after finishing scrubbing the surface.

How to maintain and repair Scraper Conveyor Chain

Scraper conveyor is widely used in food, cement, metallurgical and other industries. In the process of transporting materials, it is easy to mingle with impurities, which can cause wear of the chain. How to maintain and repair scraper conveyor chain properly? We will make a brief introduction as the following:
1.It is necessary to ensure that all pins and pin screws are fastened in place before using scraper chain conveyor. The tension of pin and the required torque, must be regularly checked and keep maintenance records;
2. In order to keep it running in good condition, please check and measure it periodically. Once scraper chain slack is found, or abnormal sound of guide rail rack hitting , please adjust the tension of chain in time;

 

3.When replace the chain, ensure the chain with the chain joints can move freely;
4. Check whether the head of scraper chain conveyor parts deformation or falls off or not.

 

Anti-reversal Control Methods of Conveyor Belt with Large Dip Angle

As upward transport belt conveyor with large angle, it is easily to occur accidents if the belt is under the heavy load, such as overload and shutdown, belt reversal, tape break . Also, it will destroy the frame and damage the equipment. What’s worse, it maybe cause casualties. Under this circumstances, it’s hard to clean the working site. So it is a great significance to do the anti-reversal control for belt conveyor with Large Dip Angle .
With regards to the methods of aiti-reversal and strip breaking protection for upward transport sidewall belt conveyor, the majority of manufactories use capture device, but it doesn’t have a better real effect. Thus, it’s better to adopt unidirectional rollers. When the belt goes up, the rollers will rotate accordingly, in this case, friction between upper belt and rollers is rolling friction. While if the belt is breakage and upper belt goes downward slide, at the same time rollers cannot do reverse rotation, on this occasion, friction between upper belt and rollers is sliding friction. In this way can it realize breaking. Generally, the material of belt is rubber while roller is steel. So static sliding friction coefficient between belt and roller is 0.9, and dynamic friction coefficient is 0.6-0.8. In addition, the angle of upward transport belt conveyor is less than 18°. When the belt is breakage and goes downward slide, as long as rollers don’t rotate accordingly, it can prevent belt from sliding if we install spilling flap on the frame. Taking the actual working conditions into consideration and according to the experimental measurement, coefficient of sliding friction between belt and roller is more than 0.45.

Outing of PK International trade department had been successfully concluded

In order to further strengthen the team cohesion, alleviate the working pressure and create a positive culture atmosphere, PK Machinery organized an outdoor activity with the theme of “ free your spirit, embrace the nature” last Sunday.

 

On 18th October, staffs of PK Machinery international trade department (ITD) came to Paoma ridge, it took about 2 hours to climb up the ridge, though everyone felt very tired, we did exercise our own body and realized that we really lacked of exercise. For going down the ridge, we chose to walk down the steps, there were 2500 steps in total and every five steps marked with numbers, hence we could judge how far it was from the steps to the ridge bottom.

After that, we stopped near a small river and set up the barbecue bracket, prepared the meat and vegetables and immersed in barbecue. Later, rich and delicious smells filled our nostrils, we really had a good time that day.

This outing not only enriches the amateur life of PK ITD staffs, but also improves the team cooperation consciousness and relieves the working pressure, what impressed us is that everyone need more exercise to keep a health life! Besides, we also welcome everyone to join in PK family：www.pkmachinery.com 

If you operate like this, the screw conveyor will become a pile of scrap metal soon

Are you complaining that your screw conveyor always has problems and you feel you bought a bad quality conveyor? After reading this article you will change your opinion.
Based our investigation, we find that many users operate the screw conveyor in the wrong way. It will not only result in conveyor damage, but also harm to the operating personnel. Please avoid the following wrong operating methods in order to utilize the screw conveyor reasonably.
1.Open the upper cover plate during conveyor running.
Users always open the upper cover in order to observe running situation easily, however, this behavior is forbidden. During running ,if sundries fall into conveyor, the conveyor will break down, such as screw blade deformation, shaft cracking, casing damage, etc.
2.Do not clean the residual material timely after using conveyor .
If the residual material is sticky and corrosive, the blade and shaft will be corroded which will lead to a shorter service life.
3.Motor is overloaded heavily.
It can make motor temperature become too high even it will lead to motor overburning. Please control the feeding flow strictly, vibrating feeder will be a good choice.
4.Do not add lubricating oil for bearing.
The dust can make the lubricating oil become viscous, thus it will influence shaft rotating, so please add oil regularly.
5.The temperature of reducer is too high.
The reason is reducer lack of lubricating oil, please check the oil amount before conveyor running.
6.After shutting down the conveyor, the shaft is forced to stop rotating.
This behavior is very dangerous, it will harm the screw blade, shaft and motor. We should stop the screw conveyor naturally.

What Should Users Notice before Running the Motorized Drum with Anti-reverse

Recently, we received a feedback from our Thailand client that the motorized drum with anti-reverse of belt conveyor didn’t rotate, here PK Machinery will explain the notice we should note which can avoid this problem effectively:
1.After installation of the whole set belt conveyor, we should check the motorized drum carefully before commissioning, check and make sure the power supply must be identical to the one stipulated by the nameplate.
2.If the motorized drum with anti-reverse, the wires connection must rotate according to the indicated rotate direction.

 

 3.Check if the oil level of the drum body is satisfied before running. The methods are suggested as below:
Rotate the drum body, keep the oil outlet as high as 2/3r, see the following figure, then remove the plug and make sure the oil surface is level with the outlet.
(This is important, if without oil, the motorized drum will occurs much noise, even not rotate, and finally it will damage)

Customer from Philippines Visited Our Company

Our customer Mr. Gonzales from Philippines paid a visit to our company on October 12th, 2015. This time, based on the cooperation, he came here to have a better understanding about our company. Our manager Mr. Lu showed our rollers production line to him, Mr. Gonzales was satisfied with our products.

After having a visit to our company, our manager took our customer to visit a local power plant which has cooperative relationship with us. They have visited the field -working situation and seen the running conditions oflong distance conveyor belt and efficient bucket elevator. Then our customer spoke highly of quality of our equipments and showed cooperation intention to us. We do believe business between us can develop fast and to our mutual benefit.

Customer from Philippines Visited Our Company

Lubrication of NE Plate Chain Bucket Elevator

In order to ensure the normal and reliable operation, longer life span of the bucket elevator, users should formulate the maintenance regulation.

Regular maintenance
1.Keep the environment clean and do regular cleaning for the bucket elevator body and drive unit;
2.Check regularly for fasteners to see whether they get loose;
3.Check if any problem with the electric wires and plugs;
4.Check if all points are lubricated with enough oil.

 

No.	Lubrication part	Lubrication category	Lubrication period	Lubrication method
1	Head/tail bearing	Calcium based grease	6 months	Intermittent
2	Take-up screw rod	Calcium based grease	3 months	Intermittent
3	Transmission Chain	HJ-40 machine oil	3 months	Intermittent
4	Reducer	HJ-40 machine oil	6 months	Continuous
5	Motor	Calcium based grease	6 months	Intermittent

The classification of Explosion-proof Vibration Motor

1.According to the principle, explosion-proof vibration motor can be divided into explosion-proof asynchronous vibration motor, explosion-proof synchronous vibration motor and explosion-proof DC vibration motor etc.

 

2.According to the working place , explosion-proof vibration motor can be divided into coal mine use explosion-proof vibration motor and factory use explosion-proof motor.
3. According to the explosion protection principle , explosion-proof vibration motor types can be divided into the flameproof type, increased safety type, positive pressure type, no-spark type and dust & explosion-proof electrical motor, etc.

 

4.According to the matching equipment, explosion-proof vibration motor can be divided into explosion-proof motor for coal mine conveyor, coal mine winch, rock loader, coal mine fan, valve, blower, marine, lifting metallurgical hydrogenation device.

 

5.According to the nominal voltage and efficiency, explosion-proof vibration motor can be divided into high voltage type, high efficiency type, high slip ratio type and high starting torque type of explosion-proof motor.

                                                          

Lubrication of Screw Conveyor

The lubrication requirement of driving device, please see the product manual that issued by the supplier.
Oil in proper amount of 2# lubricating grease between cross slide coupling intermediate plate and half-coupling when shut down the screw conveyor.
The bearings inside the tail and head end of bearing seats should be lubricated with 3# calcium base grease, and change the grease every month.

The rolling bearing inside the hanging bearing should be lubricated with engine oil every week. Note: please not oil in lubricating grease to avoid squeezing the sealing ring outside the roiling ring away.

Above mentioned lubrication time is just the minimum requirements, detailed time should be flexible and depends on the operation condition.
 

List of Lubrication parts

No.	Name of Lubrication part	Lubrication material	Lubrication part cycle	Lubrication method
1	Coupling	2# lubricating grease	1000 hours	Lubricator
2	Bearing seat	3# calcium base grease	1 month	Lubricator
3	Hanging bearing （Rolling bearing）	Engine oil	1 week	Lubricator
4	Gearmotor	00# lithium lubricating grease	6 months	Lubricator

The Solution to Solve Blockage of Bucket Elevator

If there is blockage, please stop feeding material immediately, if serious ,please stop the machine and check the cause of blockage. Please use a shovel or special tools to clear up the blocked materials instead of hands.

1.If blockage is caused by big lump material entering into the base , please stop machine ,remove big lump materials and plugging materials.
2.If blockage is caused by insufficient tension of bucket belt, please adjust the tension after removing plugging materials. 
3.If blockage is caused by large feed flow rate which exceeds the bucket elevator capacity, please adjust the control valve or use other methods to control the flow rate after removing plugging materials .
4.If blockage is caused by feed before start-up, please remove plugging materials, start up the bucket elevatoragain and operate in strict accordance with the rules. You can only feed the materials after non-load running is normal.