Useful Ways to Maintain Scraper Conveyor Chain

It is well-known that scraper conveyor is widely application in cement, metallurgical and other industries. It’s pretty easy to mix with foreign objects during the conveying process which can lead to wear of the chain. Here PK Machinery will carefully illustrate methods to maintain scraper conveyor chain.

1.What should we do first is that to ensure all pins and pin screws are fixed before using scraper chain. Please make a regular check and keep maintenance records about the pins’ tension and their required torque.

2.Please check the scraper chain periodically so as to keep it running in a good situation. Once found that scraper chain is loose or there is abnormal sound caused by hitting guide rail rack, must please adjust chain tension timely.
3.Please ensure that connection between chains can move freely if change scraper chains.

4.Please check head part of scraper conveyor regularly to affirm whether it falls or not.

What reasons lead to linear vibrating screen motor base crack ?

All users know that the vibration motor is the vibration source of linear vibrating screen , it will bring inconvenience of operation if the vibration motor base cracks and damages. Here are some analysis reasons for you:
1. Too large motor power ,model selection and exciting force which exceed the normal load of vibrating screen, it will cause damage of motor base for long time operation
2. Too thin steel plate thickness design with long time operation will cause crack.
3. There is a problem with steel plate material.
4. Welding quality can not meet the requirements.
5. The installation position of the motor does not conform to the design requirements of the vibration dynamic specifications.
More product information, please pay attention to www.pkmachinery.com

 

What Should We Notice when Operate the Rotary Valve?

What Should We Notice when Operate the Rotary Valve?

Please pay attention to the following operation notes,help it is helpful for you:

1.If motor is overheat when start up,please stop and inspect it, in order not to affect normal operation of the reducer.

2.Reducer must be operated as per the operating manual and the rotating direction must rotate according to the arrow direction as shown.

3.If powder leakage phenomenon occurs on the shaft, please tighten the packing gland bolts at both ends.

4.During operation , check  bearing heating circumstance, general bearing temperature rising shall not be over 60 ℃.

5.During operation, if abnormal vibration occurs, please stop the machine and eliminate the abnormal phenomenon.

6.If there is bolt looseness in the process of operation, please tighten the bolt.

More information,please click: www.pkengineeringsol.com

Guide Rail Makes Tripper or Bucket Elevator Perform Better

Guide rail is made of metal or other material to become groove or ridge which is a device that can withstand, fix and guide mobile device or reduce their friction. Longitudinal groove or ridge on the surface of guide rail is used for guiding or fixing machine parts. Moreover, it is also known as sliding rail or linear guides, used in the occasion of linear reciprocating motion. It has a higher rated load and can assume certain torque. At the same time, high-precision linear motion can be achieved in the case of high load.
Guide rail provides a precise operation track for the conveyor tripper car. Matched with the belt conveyor, conveyor tripper car can achieve the aim of discharging materials at any points in the certain length of belt conveyor through moving back and forth on the guide rail.

In general, guide rail is installed in the head, tail and middle part of chain bucket elevator. Also, it is usually made of wear-resistant steel and its surface is quite smooth, so on the one hand it can lessen the friction between chain and guide rail and reduce components depreciation rates, on the other hand it can prevent the chain being off tracking, so as to achieve the purpose of conveying materials efficiently.
PK Machinery adopts the best quality guide rail which is manufactured by Ma'anshan Iron&Steel that is best rail manufacturer in China, and it is used for conveyor tripper car and bucket elevator.

     

How to operate and Maintain of Buried Scraper Conveyor?

There are some options about that:

1、Should not stop the machine with load if there is no special condition.
Generally,we should stop the equipment  when the material in the trough were discharged completely after we stop feeding the material.
2、It should be no-load running for a certain time when start the equipment every time, Then feed the material after  the equipment working normally. We should keep feeding the material evenly, sudden feeding or over-load running is not allowed.
3、If the whole production line is consist of sets of conveyor, we should
start the last set first when start the whole system, then start the others one by one . The order will be opposite when stops.
4、During operating, we should protect the conveyor from the iron, large hard objects and impurities to avoid damage the equipment.
5、In general, the buried scraper conveyor should be minor repair every half year, medium repair every year and overhaul every three years. For overhaul the buried scraper conveyor, we should remove and clean all the spare part, replace all the wear part. For the motor and reducer, should be maintained and repaired according to their technical requirement.
6、Should keep all the bearing and driven device lubricated well. However, should not lubricate the conveyor chain, support guide rail, head wheel and tail wheel etc.

I hope you can collect some useful information.

How to Resolve Chain Deviation of Buried Scraper Conveyor

1. Check installation quality and take measures to correct mounting dimensions.

1) Check and adjust the flange connections between conveyor casings, make sure the connections are smooth and tightly sealed.

2) Adjust the clearance between chain and conveyor trough. The appropriate clearance value will guarantee the conveyor to operate normally, reduce energy consumption, extend the service life of chain scraper & conveyor trough, and improve transport efficiency.

3) Check and adjust the surface flatness of guide rail. The joints between guide rails should be smooth.

4) Check and adjust head and tail pulleys, which should be on one center line and correct meshing.

5) Correct and replace the deformed scrapers.

6) Repair and replace the worn-out guide rails.

7) Adjust the tension device, make sure the elastic of chain & scraper is moderate, and the tensile force of left and right sides are the same.

2. Adjust material drop point.
Material impact is one of important factors that cause chain deviation. The solution is to install a retaining plate at the inlet. In this case, the material will fall in the middle position of scraper & chain to make sure the chain will be uniformly forced, so as to reduce chain deviation.

3. Install baffle plates on both sides of the chains to prevent deviation phenomenon.

Matters should be noted during belt sway switch installation and adjustment

Matters should be noted during belt sway switch installation and adjustment

Belt sway switch is used to check the belt running deviation of the belt conveyor, it is a safe protection device of automatic alarm and stop when the belt running deviation appears.Belt sway switch is fixed on the conveyor belt bracket, action bar is at the side of the belt, when the belt running deviation appears, force the action bar deviation, and touch the alarm micro switch. If the belt running deviation continues,will touch another group of contact, and the conveyor will be protective to stop.
In the installation and adjustment of belt sway switch, what matters should we pay attention to? PK Machinery will answer for you!
1. Belt sway switch should be located on both sides of the conveyor belt, the vertical roll should be vertical with conveyor belt edge flat, and both sides of the conveyor belt are located at 1/3 height of vertical roll.
2.The distance between the vertical roll of belt sway switch and the normal position of conveyor belt should be 50 ~ 100 mm.
3.The quantity of belt sway switch ought to be determined according to the length of the conveyor, types and arrangement. Commonly it is located on the conveyor head, tail, convex segment, concave segment and the middle position.(Note: when the conveyor is longer, a pair of belt sway switch can be located every 30 ~ 35 m.)
4.Belt sway switch connects the conveyor middle frame through the mounting bracket, switch bracket will be welded with conveyor frame after the installing completion of the conveyor, and belt sway switch shall be bolted in the bracket.

Why is Bucket Elevator Asbestos Tape so Important

We have received the feedback from our Australia customer recently. Learning that threebucket elevators had already installed and our customers knew less about how to install the asbestos tape, so here we will describe its installation methods.
Asbestos consists of fibre bundle which is made of long and thin fibres. Due to its highly fire-resistance, electric insulation and heat-resistance, asbestos tape can be widely used in sealing materials of various machines or other asbestos products.
Because of high requirements about installation quality of bucket elevators, we usually adopt asbestos tape as its common sealing material. Asbestos tape can not only prevent dust leakage and protect environment, but also reduce material waste. During the real installation, asbestos tape must be positioned in the connection of casing flanges. Before connecting flanges, please add the asbestos tape in the connections and then fix the bolts. Please see the following picture as your reference.

New Order Attapulgite Clay Rotary Vibrating Screen was Shipped to South Africa

At the beginning of 2016, PK Machinery has made a shipment of rotary vibrating screen used for attapulgite clay to Johannesburg port in South Africa from Qingdao port. Though this is a small order, it has highlighted a good start.

Learning that this rotary vibrating screen was going to deal with attapulgite clay which density is 800kg/m3 and moisture is 8%, our engineers suggested that it was better to adopt model XZS-1500-4 which mesh sizes were 4mm,2mm,1.18mm,0.5mm respectively. This type can greatly reach the goal of 2 tons per hour output. Based on this, we got good press from our customers and they showed their idea of working with us again.

In the new year, PK Machinery will be your loyal friends as always!

U Type and Pipe Screw Conveyor Introduction Combining with Actual Cases

Have you ever encountered such a problem that you don’t know U type screw conveyor or Tube type screw conveyor is more suitable in your production line? Here PK Machinery will give you some suggestion as follows:

U type screw conveyor

The casing is designed to U type with a top cover which can be dismounted. It can be closed type or open type according to the working condition. For example: The following engineering drawing is a limestone production line of our Philippine client which consist of U type screw conveyor, bucket elevator and vibrating screen etc. U type screw conveyor is installed under the vibrating screen machine, which will transport different particle size material to the downstream machine. Here we suggest U type screw conveyor, the reasons are 1) Separately horizontally transport and transporting with 10 degree angle; 2) The limestone material is very abrasive, the top cover is easy to disassemble to change the screw blade and other wear parts, convenient to maintain; 3) Top cover has a better sealing, and it is easy to connect the dust collector etc.

Inclined pipe screw conveyor

The structure is pipe type with special gearbox, the rotate speed is faster than common conveyor. Then can achieve angle more than 60 degree. For instance: The following on-site screw conveyor picture is our Russian customer (AKER SOLUTIONS)’s projects. The “Aker solutions” purchased 18 sets LSY model screw conveyor for a cement production line which are installed under the cement silo. Here we propose Tube type screw conveyor, because: 1) It need to transport with 50 degree; 2) The material is easy to transport, almost no maintenance, running steady; 3) It has a good sealing performance, no dust pollution; 4) There are universal joint at the inlet and outlet, and easy to connect with others equipment.

How to Select and Install Screen Cloth of Linear Vibrating Screen

The selection and installation of screen cloth is very important for linear vibrating screen. Select the most suitable screen cloth and install it according to correct way can improve the performance and prolong the service life of the linear vibrating screen.
1. How to select the most suitable screen cloth?
a. Because it is complicated for screen cloth installation of linear vibrating screen, we should select the screen cloth with thicker wire diameter.
b. While cutting screen cloth, we should keep the width of screen cloth consistent with the mesh frame, length should be 50-70mm longer than mesh frame.
2. How to install the screen cloth of linear vibrating screen?
a. Since the tensity of screen cloth will affect the screen efficiency directly, we should keep the screen cloth tension during installing the screen cloth.
b. Please confirm whether needs to add the bouncing balls according to mesh size and difficulty level of the screened material.
c. We should add suitable supported mesh size under the screen cloth if the mesh of the screen cloth is high or bulk density of the material is big.
d. While install the pressing plate, we should keep the flatness of the plate and line with strong scalability sponge sealing to lock it uniformly.
e. After completing installation, we should test the condition of feeding material and screening with few materials. If materials run forward uniformly, classify accurately without mixing phenomenon,linear vibrating screen can be used well. If not, we should adjust the linear vibrating screen mesh and test again.

Attapulgite clay rotary vibrating screen was dispatched to South Africa

Last week,PK Machinery dispatched its first batch of cargo from Qingdao port to Johannesburg port in the new year 2016!
The equipment,rotary vibrating screen is used for sieving attapulgite clay with 800kg/m3 density and 8% moisture,the total output is 2 tons per hour.Meanwhile,our client requires 4 lays,mesh sizes are:4mm,2mm,1.18mm,0.5mm.
After knowing well of client’s requirement,PK engineer configured model XZS-1500-4,which can achieve the expected output,besides,we also suggested some screen mesh and vertical motor as spare parts,client spoke highly of our considerate advice and expressed his wish to cooperate with PK Machinery again.
Well begun is half done,we are sure we will advance a further step in 2016!

Application & Development of Vibrating Screen in Food Industry

Vibrating screen used in food industry is a kind of high efficiency screening machinery for high precision fine powder and other materials , which is easy to operate, fully enclosed structure, suitable for granular, powder, mucus and other materials screening and filtering classification. 
Such as powdered sugar, starch, salt, rice flour, milk powder, milk, egg, soy sauce, vinegar, fruit juice, papaya powder, green tea powder, kudzu powder, and potato processing production which are commonly used in daily life,vibrating screen will be a good helper. 
Take starch or rice powder as example, usually the first procedures : impurity removal of raw materials - screening-weighing;secondly , soaking- coarse grinding-germ separation-fine grinding-screening of starch-protein separation-centrifugal dewatering- thermostatic drying, lastly,weighing-product packing. We can not imagine how to deal with the screening in the process of food without vibrating screen. Vibrating screen overcomes the difficulty of fine material screening easily, which also makes food diversified and entire food industry develop rapidly.

The Cause of Bearing Premature Failure

Bearings is a small part which can fix and reduce load coefficient of friction during the processing of mechanical transmission. No matter vibrating screen, belt conveyor, bucket elevator or scraper chain conveyor, bearing is always one of their important parts. However, there is premature failure phenomenon during using. So we will introduce the cause of the bearing premature failure.
Improper installation
A big number of the premature failure bearings are cause by improper installation or the users haven’t realized to use correct installation tools. For correct and effective installation and disassembly,different installations may require mechanical, hydraulic or heating method. Based on professional engineering service technical knowledge, special tools and professional installation, you can get maximum machine trouble-free operation time.
Improper lubrication
Although we do not need to consider this problem if using” free- maintenance” bearing, there are still 36% bearing premature failures are due to incorrect technical parameters of lubricant. Inevitable result is that the bearing lacks of correct lubricant, which will fail prematurely. As bearing is the most difficult part to be accessed in the whole machine, neglecting lubrication may cause all kinds of problems
Pollution
Bearing is a precision part, they can not work efficiently if they can not keep away from the pollutant. At least 14% of all bearing premature failures are due to pollution problem.

Ways to Maximize the Performance of Belt Conveyor

During application of belt conveyor, it is beneficial to reduce operating resistance by using high precision conveyor rollers and high performance belt. Revolving resistance of rollers and forward resistance of belt conveyor account for 50% main resistance in belt conveyor. If the belt conveyor length is more than 80m, main resistance will be influenced by device condition, friction coefficient related to real working condition, conveyor length, rotating quality in unit length of roller, belt quality, material property, etc.
Apart from above mentioned influential factor, we can refer to the following ways to maximize the performance of belt conveyor:
1.Reduce or adjust belt deviation;
2.Add lubricating oil to components of belt conveyor;
3.Clean up the sundries produced in transportation promptly;
4.Tension force of belt conveyor should be adjusted the best status;
5.Please add oil to conveyor pulley at fixed period to ensure smooth rotation;
6.It’s better to adopt vulcanized joint, though it costs too much money, it can keep a longer service life(especially suitable for fix belt conveyor).

How to Select Belt Conveyor Pulley?

You need to provide following parameters before you purchase belt conveyor pulley.
1.Diameter of pulley wall(not include rubber thickness):_________mm.
2.Length of pulley wall:___________mm.
3.Diameter of pulley Shaft:_________mm.
4.Length of pulley Shaft:___________mm.
5.Material of Pulley wall:______________.
6.Material of Pulley shaft:_____________.
7.Bearing brand:_____________.
8.Keyless Locking Devices brand:____________.
9.Surface treatment:______________(coating rubber/galvanized/other)
(1)If coating rubber,thickness of rubber:__________mm
(2)Rubber type:____________(herringbone/rhombus/other)
10.Pulley type:_________(ordinary pulley or motorized pulley)

If motorized pulley,please confirm following information:
(1)Motor installation type:______________(exterior installation or interior installation)
(2)Motor Power:_________Kw.
(3)Motor Voltage:3 phase ______V______Hz.

Besides,in order to ensure conveyor pulley to meet your needs,please confirm the conveyor information:
1.Handling Capacity:________t/h.
2.Belt speed:__________m/s.
3.Driven device Power:_____________kw.
It’s better that if you can provide pulley drawings! 

2016 PK Machinery will Write a New Chapter

You need to provide following parameters before you purchase belt conveyor pulley.
1.Diameter of pulley wall(not include rubber thickness):_________mm.
2.Length of pulley wall:___________mm.
3.Diameter of pulley Shaft:_________mm.
4.Length of pulley Shaft:___________mm.
5.Material of Pulley wall:______________.
6.Material of Pulley shaft:_____________.
7.Bearing brand:_____________.
8.Keyless Locking Devices brand:____________.
9.Surface treatment:______________(coating rubber/galvanized/other)
(1)If coating rubber,thickness of rubber:__________mm
(2)Rubber type:____________(herringbone/rhombus/other)
10.Pulley type:_________(ordinary pulley or motorized pulley)

If motorized pulley,please confirm following information:
(1)Motor installation type:______________(exterior installation or interior installation)
(2)Motor Power:_________Kw.
(3)Motor Voltage:3 phase ______V______Hz.

Besides,in order to ensure conveyor pulley to meet your needs,please confirm the conveyor information:
1.Handling Capacity:________t/h.
2.Belt speed:__________m/s.
3.Driven device Power:_____________kw.
It’s better that if you can provide pulley drawings! 

How to Select a Proper Scraper Conveyor

1.Name of material __
2.Material density __ t/m3
3.Handling capacity of conveyor__ t/h
4.Temperature of material__℃.
5.Average particle size __mm, max.particle size__mm.
6.Level or inclined conveying?
If level, please inform distance between inlet and outlet__m
If inclined,please inform level conveying distance:__m,
Vertical height:__m
Inclined angle:__°
7.Voltage:__V, frequency__HZ,3phase,driving device brand:__
8. Ambient temperature__℃.

Happy 2016 Chinese Spring Festival

Spring festival is coming, which is the most important traditional festivals in China. Feb 8, 2016 is the Chinese traditional New Year of monkey. In China, monkey is a symbol of witty, clever and lively, which represents auspicious omen and our good wishes and luck in the New Year!
PK Machinery will have 8 days’ Spring Festival holiday (05/02/2016-12/02/2016), if you have any question or inquiry, please leave message to Mr. Can Wang:

Can Wang
Tel:+86 15836006651	Skype:pkmachinery
Whats App: +86 15836006651	Wechat Ming751670143
Email: can@pkmachinery.com	QQ: 751670134

PK Machinery wishes all of you around the world a happy monkey’s year, good luck! Also hope we can establish good relationships with you and together to create a good year in 2016!
Thanks for your long time trust and support & Happy New Year!

How to prolong lifespan of belt conveyor

Quality of belt is the main reason to impact on belt conveyor lifespan, so it must purchase the belt with high quality. Meanwhile, it should make sure that sweeper is reliable to use so that there is no material on the return belt. Otherwise, materials adhered to return belt will be taken to the surface of drive pulley and bend pulley, then it will damage belt and reduce its lifespan.
There are some problems in the use of belt conveyors sometimes, to which require you to pay attention that you can greatly extend the service life of belt conveyor.
1. If there is the phenomenon of belt slipping on drive pulley, users should find the reasons and adjust it promptly.
2. Please always check the belt connectors, if there is local damage, please repair it or replace conveyors joints.
3. Please check rollers using conditions regularly. Adding proper lubricating grease into sealing ring when making maintenance. And replace inflexible rotating rollers immediately.
4. It must add good quality lubrication into all rotating parts of belt conveyor. Please add lubrication at fixed period in accordance with the requirements.
5. Please ensure that the cleaning device has good working conditions, and the damaged components should be replaced.
6. Please check tension level of belt conveyor regularly. If the belt is loose, please tension it promptly and observe whether the belt is off tracking, otherwise it should be adjusted timely.

The application of conveyor belt fluid coupling

Fluid coupling is a used fluid transmission component. Motor drives coupling pump wheel rotation, pump impeller blade agitates intracavitary working liquid, under the centrifugal effect,pump wheel turns mechanical energy into liquid energy, then passes to the turbine blades, turbine passes the absorbent liquid energy to the machine.
Fluid coupling has the function of flexible transmission,slow down the impact and the isolation of torsional vibration, prolong the start-up time, reduce the starting current,make the motor light load start-up, solve the problem of heavy large inertia load start-up difficulties and protect the motor when overloads, energy and power saving effects are remarkable.
On the conveyor, fluid coupling has the function of connecting motor and reducer ,it replaces the mechanical coupling. The belt conveyor fluid coupling has two effects:
1.Overload protection
If the belt conveyor is overload, fluid coupling slip frequency increases, working fluid warms up, fluid coupling will spray without burning motor to a certain temperature. Of course sometimes coupling will be installed with a temperature control device, when work liquid superheats, temperature control device can control the motor and cut the power cut to protect the motor.
2. Flexible-start
When motor starts,belt conveyor starts slowly and acceleratedly , this can reduce the grid big impact to make the motor start up in light load. At the same time,it can reduce the effect of belt tension,protect belt and prolong life, especially under the heavy load start-up.

http://www.pkmachinery.com/faq/application-of-conveyor-belt-fluid-coupling.html

What is the required dimension for conveyor roller selection?

1. We can provide standard roller suitable for belt widths of between 400mm and 2400mm.
1) Belt width: 400mm, 500mm, 650mm, 800mm, 1000mm, 1200mm, 1400mm, 1600mm, 1800mm, 2000mm, 2200mm, 2400mm
2) Roller diameter: 63.5mm, 76mm, 89mm, 108mm, 133mm, 159mm, 194mm, 219mm
3) Roller length: 200mm – 2500mm

2. Could you provide the following specification for conveyor roller selection?
1) Shaft Length A __________mm
2) Gauge Length B __________mm
3) Face Length C __________mm
4) Roller Diameter D __________mm
5) Across Flats E __________mm
6) Wall Thickness F __________mm
7) Shaft Diameter G __________mm

Difference between forging and casting of scraper chain machining process

Forging and casting is commonly used in the mechanical processing of scraper chain, but do you know the differences? Today, PK Machinery will introduce it in details.
Forging is a processing method which uses the forging machinery occurs pressure to metal blank, make it produce plastic deformation to obtain a certain mechanical properties, a certain shape and dimension.
Casting is the process thatmakes the metal melt into a certain requirements of liquid and pour into the mold, after cooling, solidification, and cleaning the whole process to obtainwith a predetermined shape, size and performance of the casting (parts or blanks).
Generally forging chain mechanical properties are generally better than the same kind of casting chain, but the cost is higher. Although the cost of casting is low, but the production needs more materials and equipment, it will produce dust, harmful gases and noise which will pollute the environment, so we will choose forging chain as the traction component of scraper conveyor in most cases.