How to select conveyor cover?

Application and Working Principle：
YD Conveyor Covers is well known as conveyor belt hood and used to protect transported material and conveyor belting, idlers and structure. Effectively they improve personnel safety; reduce loss of material to wind and stop grime and rain from damaging the idlers and belt.
YD Conveyor Covers is mostly used in power plant, cement factory, iron and steel factory, chemical factory, coal, port, jetty, mining and other enterprise. Our company provides fixed-closed type and open type. The color of the rain covers are mainly in blue, grey and white, and red (depend on client’s need).

Selection guidelines
1). Please tell us your belt conveyor’s width____mm and length____mm;
2). If possible, please indicate the opening width____mm of the conveyor cover;
3). Please indicate the thickness of the cover you required____mm;
4). Every piece conveyor cover’s length is 970mm, except overlap installation, the effective length is 900mm.
5). The material is colorized galvanized steel plate, the thickness are 0.5mm, 0.6mm, 0.8mm, 1.0mm.
6). Coud you tell us will you need fixed type conveyor cover or open-close type conveyor cover?

 

 

Part open-close type（generally for large belt conveyor width） 

 

Whole open-close type

 

 

Vibrating feeder installation commissioning and maintenance tips

1.Vibrating feeder is used for batching and quantitative feeding material to ensure uniform feeding stability,horizontal installation should be adopted to prevent self flowing, declined10 degree installation should be adopted if there is continuous feeding, declined 15 degree installation can be adopted for viscous material and large water content material.
2 .After the installation, 20mm level lateral clearance should be left for vibrating feeder, suspension device should adopt flexible joint.
3. Before non-load test, please fix all bolts, especially the anchor bolt of vibration motor tighten the bolts again after continuous operation for 3-5 hours.
4. Two vibration motor must be reverse rotation when test run to check the current and noise stability, if any abnormal conditions, please stop the feeder and solve it timely.
5 Motor bearings should be lubricated every two month, for high temperature season bearings should fill the lubricating oil every month.

 

Rotary & Linear Vibrating Screens for Pegmatite were Delivered to Namibia

Yesterday,linear vibrating screen and rotary vibrating screen were dispatched to Namibia from Qingdao China,before leaving factory,client came to PK Machinery for inspection all items and watched the trial run,he spoke highly our equipment and expressed his desire to cooperate again in the near future.
The screens handle 50 tons pegmatite material per hour feeding rate in total,detailed information shown as follows:

Linear vibrating screen
Model:2ZSH1536
QTY:3 units
Construction:carbon steel
Type:vibration exciter type
Deck: double deck with opening 1 and 0.5mm
Motor:Y132M2-6,2*5.5kw,380V50Hz3phase

 

Rotary vibrating screen
Model:XZS-1800-2S
Deck:double deck with opening 0.210 and 0.09mm
Construction:material contacts parts are SUS304

Hope above information can be helpful if you have similar sieving problems.Further information please click:www.pkmachinery.com

What is your Spring Festival wishes?

The role of polishing processing for vibrating screen

Under normal circumstances, If vibrating screen construction material is stainless steel, the equipment in the factory normally needs to be polished before delivery. Different surface processing will create different effects  on the stainless steel surface, such as food processing and pharmaceutical industry,the sanitation requirements are relatively high. In these applications, vibrating screen surface must be smooth, thus it is not easy to begrime, begrime will result in stainless steel surface becoming rust even corrosion, so the stainless steel vibrating screen must be polished inside and outside in these special industries.

In addition, some fine powder industries also need to be polished, after polishing, the vibrating screen body surface is not easy to tainted with fine powder, it’s easy to clean, also can screen other materials;For other common industries,you just need to polish the outside surface,it looks beautiful after polishing,and the surface  will not hurt the hands in the process of use.

Reasons lead to circular vibrating screen mesh plug

When circular vibrating screen works, the material properties are very different, as well as its shape. Due to different shape of material ,it can produce a various forms of mesh plug.After the analysis of PK machinery engineers, the cause of mesh plug mainly shown as follows:
1.Contains a lot of close to the separation point particles
2. The material moisture content is higher
3. The spherical particles or material has multi-contact points property to mesh
4. Static electricity occurs
5. Material is a fibrous material
6. Flake shape material proportion is more
7. Woven mesh wire diameter is too thick
8.Thick Sieve mesh, unreasonable hole shape design, which will lead particles get stuck.

5 Ways to Solve Bucket Elevator Ash Leakage

(1) Whole Casing flange gasket of bucket elevator damages or no flange gasket, please change new gasket, glue with the sealing glue, retighten the flange bolts.
(2) If material leaks from the head section and bottom base gap, please add a gasket or sealant.
(3) If altitude difference is too large, it will increase material feeding pressure, please change the material feeding method, add a feeding buffer device.
(4) Drive chain occurs idle rotation, please adjust the chain length. 

(5) Casing installation is not straight, please adjust perpendicularity of the casing length. 

 

Notice During The Using of Ultrasonic Rotary Vibrating Screen

 Ultrasonic rotary vibrating screen is a kind of high-speed screen equipment which is special for overtake fine powder. Can effectively solve the screening questions, such as material with strong adsorptivit, easy agglomeratio, high static electricity, high precision,big density, light specific gravity etc. In this article, PK Machinery will introduce the notice we should pay attention during the using of ultrasonic rotary vibrating screen.

1.Operator should keep a certain distance away from the equipment to avoid accidents.

2.Please operate according to the operating instruction strictly, do not change the operate procedures arbitrarily.

3.Operator should check the safety condition timely:oil level, screen surface tension condition, fasten condition of bolts for all parts, complete condition of the screen surface etc.

4.During the operating of the ultrasonic rotary vibrating screen, we should check the condition of the motor and screen body by seeing and hearing.

5.Stop the equipment according to the process system procedure, it is prohibited continuing feeding material after stopping the equipment.

6.After stopping the equipment, check whether the bearing temperature rises or not.

7.After being put into use, keep the safety record of the ultrasonic rotary vibrating screen timely.

What is the Role of Auxiliary Transmission Motor?

Generally speaking, main motor of bucket elevator is used in normal operation,while auxiliary transmission motor is generally used in the repair time.
When the main motor breaks down,starts, or during the repair process, users can use the auxiliary transmission motor to help the main motor start up, ordrive the main motor at low-running speed. The connection structure of auxiliary transmission motor and the main motor is simple,the operation is reliable.

 

What are the Comparative Edges?
1. When the main motor occurs troublesand cannot operate normally, at first please stop feedingmaterials.In order to protect the bucket traction pieces and hoppers from damage, operators need to clean up the materials which are hung in the air, then operators can start up the auxiliary transmission motor to clean the residual materials inside the hoppercompletely .
2. Compared with main motor, the power of auxiliary transmission motor is much smaller, so with the help of auxiliary transmission, bucket elevator slows down. According to this characteristic, it’s easy to overhaul bucket elevator, clean up hoppers and traction pieces through bucket elevator observation window.

Working Principle and Performance of Star unloader

Star unloader is the mainly ash discharge equipment for stockpile, feedstock, quantitative feeding, pneumatic conveying and dust removal equipment system. In general, it is consist of rotor wheel with blades, casing, sealing, reducer and motor etc.
Working principle : when the star unloader works, the dust dropsinto the valve by gravity, thenfills the star blade on the top and side fully. The blade rotor rotates together with the reducer rotate shaft which is driven by motor, the dust will be discharged by self-gravity.
The outlet of bag dust collector and cyclone dust collectorshould be equipped with rotary valves, to discharge the dust into the dust collector hopper and ensure the air tightness of the whole dust collector system. Rotary valve is the most advanced discharge device in china, usually can be used as one of the most important equipment in dust collector system. It specially used for dust and small granular material in environmental protection, metallurgy, chemical, grain, cement, build road, drying equipment etc industries.

 

Application For Different Forms of Bucket Elevator Hopper

TH bucket elevator hopper type can be divided into: shallow hopper, deep hopper and triangle hopper. 

Shallow hopper mouth and back wall angle is small, which can be loaded with less material, but it is easy to unload. Suitable for the transport of wet, sticky, and other liquid materials such as cement, wet sand, gypsum powder, etc.

Deep hopper and shallow hopper are made by the steel plate welding or direct stamping, cast iron and cast iron can be used as well, in order to reduce the weight of the hopper, it can be made of fiberglass. The bottom of the chute is provided with a guide groove which is formed by the guide side, and the guide chute of the former hopper is guided by the material discharging from the unloading port, which is suitable for the working speed, carrying heavy and fragile materials for example:large coal, ore, coke, etc.The guide chute bucket general use of steel after stamping die hard like welding, the guide chute bucket is a densely arranged in the traction component, and the deep and shallow bucket bucket along the length direction of the driving component arranged at a certain distance from. Shallow bucket and deep bucket can be used for TH/TD type bucket elevator, triangle bucket is generally used for NE type bucket elevator.

Cement spiral conveyor spare parts introduction

Main spare parts of the cement screw conveyor are screw blade, reducer, intermediate bearing, tailstock, flange plate, universal joint and so on.
Continuouscold rolling of the screw blade makes the surface hardening, so the hardness and wear resistance of the surface is improved, smooth and neatsurface,highoverall accuracy , the smallresistance, and the transmission efficiency is improved as well.

 

 

The universal joint is used to realize the shaft power output of different directions. According to the universal joint, it can be divided into rigid universal joint and flexible universal joint.

 

Advantages of reducer are: new hard tooth surface, high precision, small volume, light weight, strong bearing capacity, high transmission efficiency, convenient installation etc. 

 

The intermediate bearing mainly bears the weight of the shaft, the deformation of the shaft and the radial load generated by the rotation. The intermediate bearing is divided into two kinds:sliding bearing and rolling bearingaccording to the basic structure of the bearing and the friction form of the contact part.

 

The Installation and Debugging of Scraper Conveyor

Scraper conveyor has the wide advantages of reasonable structure, modern design, good sealing and handling safety etc. But how to install the scraper conveyor before put into use? Here PK Machinery will show you the answer as follows.

1. Before installation, carefully check the parts whether are complete.

2. Scraper and scraper chain as the important component of scraper conveyor, before installation, it is necessary to check the two links whether are smooth and solid, whether the chain joint rotation is flexible. If not, one should be handled in time.

3. The installation angle should be less than 15 °,the foundation should be solid and reliable.

4. Each segment is connected tag order factory assembled according to manufacturer. It should ensure that the cabinet horizontal level, particularly to ensure the flatness of the housing wall, is not allowed at the upper and lower flange connection, about dislocation, in order to ensure the smooth running scraper chain.

Bucket Elevator Casing Embossing Process

Embossing is commonly seen in the bend place. Generally speaking, according to the force requirements ofbucket elevator middle casing, steel plate will be folded into geometric shapes (such as rectangle, etc.) or grooved shape in order to ensure and strengthen the intensity and stiffness of casing side. Through this kind of technology, it can enhance bucket elevator rigidity so that to prevent its deformation caused by uneven force. Meanwhile, material consumption and investment costs could be saved as well as to ensure the aesthetic appearance.
1. Stiffness Properties Advanced
Stiffness refers to the ability of material or structure to resist elastically deformable. The steel plate intensity and rigidity of bucket elevator casing can be enhanced by embossing process. Therefore it will reduce the casing deformation.
2. Improve Strength Properties
Strength refers to the ability of metallic materials to resist permanent deformation and fracture under the external force. Making a flute in the proper position of bucket elevator casing can increase its local intensity and reduce component breakage costs.
3. Reduce Costs
Ensuring the same intensity and rigidity, it can save steel plate dosage and reduce production costs by embossing process.

Cross-border Business of XinXiang Held 2016 Spring Festival Celebration

On January 19th, 2016, dozens of foreign trade enterprises took part in the Spring Festival Celebration actively which was sponsored by cross-border business of Xinxiang. The whole activity has took 5 hours with happiness and joy atmosphere as well as achieved great success.

 

At the beginning, the hosts announced the opening of Spring Festival Celebration, and then Mr. Zhao who is the association president of cross-border business of Xinxiang gave a speech. After that, all of involved enterprises performed programs to make a very exciting and enthusiastic moment. What’s more, during this activity, it is also set some games and prize presentation to make it more interesting and colorful. Near the end of this activity, we also selected three excellent programs and awarded prizes. At last, all of us took a group photo to mark this memorable occasion.

 

Moreover, PK Machinery also energetically joined this celebration and showed our spirit outlook well. We do believe we can achieve great performance and this goal will come true in the new year.

 

Analysis on Chain Deviation of Buried Scraper Conveyor and Its Countermeasure (I)

1. The Influence of Chain Deviation of Buried Scraper Conveyor
1) The chain deviation causes excessive clearance between the scraper and one side of conveyor trough, which will reduce material average speed, be not good for material internal friction increase and the overcome of external friction resistance between material and trough wall, eventually reduce the conveying efficiency. On the contrary, undersized clearance will increase the conveying resistance, accelerate the wear of scraper and conveyor trough, and finally reduce the conveyor service life.

2) The chain deviation increases the noise, which is caused by the crash between scraper and conveyor trough wall, and causes the scraper damage further.

2. The Reason Analysis of Chain Deviation

1) Poor installation quality leads to chain deviation.
-The straightness accuracy of whole conveyor is out of tolerance.
-The head and tail pulleys are not on one center line.
-The pulley and shaft are deflective installation.
-Conveyor casings are deforming.
-Conveyor chains are deforming.
-The wear of rail is uneven.
-The inconsistent tension adjustment leads to tail shaft deflection.
Above conditions can lead to chain deviation.

2) Material impact leads to chain deviation.
The unstable material drop point causes the uneven pressure on both sides of scraper, which is easy to cause the chain deviation phenomenon.

3) Uncertain factor leads to chain deviation
Due to the complicated force conditions, long distance buried scraper conveyors or the ones with large-sized trough, often have chain deviation phenomenon because of existing larger frictional resistance, even if they are well installed.

How to become a professional buyer for Circular Vibration Screen?

How to receive the circular vibrating screen quotation in a short time?
You need to offer following parameters if you want to buy a circular vibrating screen:
1.Material Parameters:
(1)Material name:________.If possible,please provide material photos.
(2)Handling capacity:_________ton per hour(t/h)
(3)Density of material:________ton per stere(t/m³)
(4)Material size:______mm.
(5)Water content:________%.
Equipment Parameters:
(1)Layer number:________layer. for example,If you want to get 3 kinds size range material,the layer number should be 2 layers.other situations and so on.
(2)Mesh size of each layer:________ mm. For example,if material size is from 5mm to 20mm,you want to divide into 3 kind size range material.they are 5mm~12mm,12~16mm,16mm~20mm,so the top layer mesh size should be 16mm,and the bottom layer mesh size should be 12mm.
(3)Material size distribution:_________%.for example,if you want to get above three kinds material(5mm~12mm,12~16mm,16mm~20mm,)you need to tell us their size distribution:5mm~12mm____%,12~16mm____%,16mm~20mm____%.
(4)Driven device parameters:
Brand requires:________ABB/SEW/Siemens/Domestic
Voltage:3 phase______V_____Hz.
(5)Other
What’s the upstream equipment above screen inlet?_______we need to know the loading method.
What’s the downstream equipment under screen outlet?_______we need to know the discharge method.
If you can offer above information,you will receive a accurate quotation in a short time.

Maize can not be sieved without vibrating screen

 Vibrating screen should be adopted in the beginning of the removal of impurities during the production of maize starch,in order to ensure a safe production of raw materials,so the removal of impurities is very necessary, maize raw materials contain a variety of impurities, dust, organic impurities, inorganic impurities. The general design will be 3 screen decks, the first deck screen surface with an aperturesize of 17-20mm hole, aimed to eliminate over sized impurity; second deck screen surface with an aperturesize of 12-15mm hole, used to remove impurities of medium size, third deck screen surface with an aperturesize of 2mm hole, used to remove minor impurities.

Advantages are high precision, large capacity, simple structure, low energy consumption, low noise, long service life, good sealing, no dust overflow in the screening process, and reduce the pollution of the dust, the screening efficiency is up to 98. It is very suitable for the screening and classification of powdery and granular materials, applicable to dry powder material chemical industry, food, medicine, metallurgy, plastics, glass, building materials, food, fertilizer, abrasives, ceramics etc.

 

How many types of vibration screen sieve mesh do you know?

Vibration screen sieve mesh is one of the main components of vibrating screen. If the sievemesh can not be chosen correctly, it will even affect the screening efficiency, when screening material is unqualified ( mesh is over sized), materials will accumulatedon the sieve badly (mesh is too small, material will accumulate on the sieve and lead to screen mesh damages). Here we’d like to introduce the different types of sieve meshed as below:
Woven mesh: material commonly used forscreening equipment with smallmaterial density and capacity. The construction materials are stainless steel sieve mesh, low carbon wire mesh, galvanized wire mesh. According to the material particle size, density, volume, material characteristics ,please choose sieve mesh with different construction material, aperture, wire diameter.

 

Punched sieve mesh: the span life of punched mesh is related to the mesh thickness, different mesh sieve size should use different thickness. The advantage of punched mesh is that it can be fixed according to the material shape.

 

Welding sieve plate: mainly used for ore sieving, coal sieving, it is welded by steel plates.

 

Belt conveyor for bagged cement onsite

Small part with large effect : Vibrating Screen damper

Do you know Circular Vibrating Screen damper?it’s a device which limits vibrating screen horizontal vibration.
May be you feel puzzled,is there any vibration in the horizontal direction?The answer is no In theory, but the practice has proved that it exists, the reasons are as follows:
(1) The distribution of material on the screen mesh is uneven.
If the material is uneven,it can lead to the uneven force for screen box ,thus vibrating error appears.
(2) Installation error.
The Circular Vibrating Screen needs horizontal installation,but in the process of installation, the error will inevitably occur, resulting in a height of four supports occur small deviation, but the small deviation will be amplified by the vibration exciter, thus it will result in greater vibration deviation.
(3) the stress error of the spring.

 

As we all know, it is only a reference value to measure the standard of a vibrating spring,if the stress in the same reference range, it will be defined as the same model of vibration spring, therefore, it is hard to avoid the stress error.
There is a great harm to the vibrating screen box horizontal vibration If you don’t solve in time, the side wall of the screen box will be worn, and the worse result is that the side wall will be worn out, which will affect the normal operation of the circular vibrating screen.
So how to avoid the occurrence of such an accident? Here we will introduce the key part of the circular vibrating screen - damper.
As shown in figure, the structure of the damper is composed of 6 parts:adjusting bolt, flange, spring base, spring, rubber base and rubber.
When the screen box appears the horizontal vibration error, the internal spring of damper will occurs a reverse thrust to the sieve box, thus it will restrict the screen box in the horizontal movement to avoid the horizontal deviation.

 

How to select the gyratory vibrating screen

Gyratory vibrating screen is generally used for granule, powder etc fine screening, such as urea, silicon carbide, activated carbon, silica sand, salt, sugar, plastics etc industries.
Features of gyratory screen:
1. It can be customized to be 1~3 lyers, and the sieve mesh size can be indicated;
2. Generally,Screen mesh material is stainless steel, it also can be selected according to the customer’s requirements;
3. There are self-cleaning device (bouncing ball) under the screen mesh, to avoid blocking during running;
4. The gyratory screen box can be open-type, also can be enclosed model, sealing and dustproof;
5. The main screen body generally is hanging installed, it also can be designed to be seated type accordingly;
6. The screen mesh width can be selected from 1200~2000mm, screen mesh length can selected from 3000~4000mm. Special design also can be achieved.
In order to give you a better project solution, please kindly supply the following technical requirements:
1. Do you have any installation space limit?___
2. How to feed material into the gyratory screen:___?
3. The required capacity ____t/h
4. Separated material name _____
5. Material density ____ t/m3;
6. Material particle size distribution percentage___%
7. Material temperature ____℃;
8. How many layers do you need ? or how many kinds range particle size material will you want to separate out?
9. If need to match the feeding device or discharging belt conveyor, please kindly send us the production line layout sketch, we will help you design the details accordingly.

How to calculate the transmission capacity of the screw conveyor?

1, the density of material and property of the material

2, the selection of the screw conveyor model size and delivery distance, the installation direction, etc..

Approximate calculation formula of screw conveyor:

Capacity Q = 47 D2 N TΦP C（t/h）

Formula:

Q - transport capacity (t/h);

D - conveyor diameter m;

N-- screw shaft speed r/min;

T - pitch m;

Φ - material filling coefficient, under normal circumstances, the grain by =0.25 - 0.4, =0.25 - 0.35 psi oil, wheat bran, rice bran flourψ=0.25, ψ =0.2

P - bulk density  t/m3;

C - conveyor angle coefficient;

S - helical blade pitch (m), S=0.8D of the face, with a blade of S=D.

Calculation formula for ultimate speed:

Formula: N /min - helical axis limit rotational speed (Y);

A - the coefficient of the material properties, the general desirability of grain and oil materials is A=65.