Two-way Pull Cord Switch of Belt Conveyor Protection Devices

The two-way cord switch adopts the world’s leading dual bearing transmission structure in order to avoid the friction exists on drive shaft directly when the s pull cord switch is switched on, causing the increasing gap, improper seal or stuck phenomenon, which will prolong the life-span of pull cord switch. Precise painting applied on the surface of two-way pull cord switch of belt conveyor protection devices which is not easily to fall off. The driving shaft is made of stainless steel material with high intensity, the surface of shaft is smooth. The lever is made precisely to avoid the welding. Besides, the bronze cushion is built internally which makes smooth surface of lever and higher intensity. This product has several advantages, which are longer life-span, flexible, practical ,safe and reliable operation, easier maintenance and so on.

What Problems Will be in the Material Lifting Process of Bucket Elevator?

In the material lifting process of bucket elevator, there may be such problems: insufficient material lifting rate, insufficient material discharging rate and material leakage phenomenon, only they are resolved timely ,the bucket elevator can have best effects .The reasons and solutions are as follows:

(1) insufficient lifting rate:

The material is likely to be caked on the bucket or chute, clean and remove the materials regularly according to caking condition. There is also possibility that the storage capacity of bucket elevator upstream equipment is insufficient which causes less feeding material, as result, the bucket elevator can not reach the design capacity, so we should try to improve the production capacity of upstream equipment. If the speed is slow, we have to change the speed ratio of the sprocket. Or it is caused by improper or wrong material calculation, check the calculator and material proportion, calculate again.

(2) insufficient material discharging rate:

The capacity of bucket elevator downstream equipment is small, make the discharge chute block, so we should improve the capacity of the downstream equipment of bucket elevator. It may also cause by small chute size or inappropriate chute angle ,so adjust the discharging chute. There is also a possibility that the material is caked on the chain bucket or inside the chute, so we need to remove material and maintain the bucket elevator periodically.

(3) material leakage phenomenon:

If the material leaks from the gap of head section and bottom section, please add the sealing gasket or glue with sealant . Replace new sealing gasket ,glue with sealant and tight the flange bolts if there gasket of bucket elevator flange is broken. If it is caused by large material feeding height difference and feeding pressure, please change the material feeding method and add the feeding buffer device.

How to Trouble Shoot Bucket Elevator Belt Problems?

As a continuous conveying machinery for loose materials conveying equipment, bucket elevator has been widely used in food, feed, chemical and other industries, it is applicable to vertical conveying for powder, granular and small lump materials. The advantages of bucket elevator are: simple structure, high efficiency, low malfunction, etc. However, failure always happens in our daily operation which will affect the working performance. Here we will talk about the failures and troubleshooting of bucket elevator.

1.bucket belt deviation
A. Failure cause : the main reason of bucket belt deviation is that when bucket belt is stretched, the adjustment is not timely or not appropriate .
B. Troubleshooting: adjust the tensioning device or gravity tensioning device at the bottom of the elevator, make the hopper with appropriate tightness and keep two axis of bucket elevator under parallel.

2. bucket belt slip
A. Failure cause: bucket belt is too long or balance weight is too light.
B. Troubleshooting :if the bucket belt is too long, you can cut a section of belt and hang it well; If the balance weight is too light, you should add balance weight until you belt slip phenomenon is eliminated.

Conveyors Designed for Pakistan Soda Ash Plant were Finished Production

Project name: Dense ash plant expansion project

Equipment name ,model and quantity:11 units of MS320 scraper conveyor,3 units of TB250 Bucket elevator,4 units of LS315 screw conveyor.

After three months’ production, scraper conveyor, bucket elevator and screw conveyor designed for Pakistan soda ash plant finally have been finished!

With rich engineering design experience and professional technical ability, PK machinery wins the highly praise from clients. We are sure this cooperation will lead a big step and build a solid foundation in Middle East market!

 

PK machinery is a professional manufacturer which has been engaged in designing and fabricating belt conveyor, bucket elevator, screw conveyor, vibrating screen etc. for several years. Further information please click: www.pkmachinery.com.Glad to be your loyal friend!

 

www.pkmachinery.com

High performance conveyor-Buried Scraper Conveyor

 With regard to scraper conveyor, there are many types.Buried scraper conveyor belongs to it.The main features of buried scraper conveyor are that can be in a slant or vertical angle and operate together or individually.So it is universal.Buried scraper conveyor has a simple structure,light weight,small volume and good sealing.Also,it is easy to install or maintain.It not only can convey material in a horizontal angle,but also in a slant or vertical angle.What’s more, it can feed or discharge materials in many points.So its layout is very flexible.The working conditions can be changed markedly when it convey materials because the shell is enclosed.And then it can protect environment.

 

    We can solve the problem existed in medium plate which is made from steel through using ultra high molecular weight polyethylene.Thus, we can get plastic scraper conveyor.With regard to large-scale scraper conveyor,we can apply the method of steel-plastics compounding material.Using ultra high molecular weight polyethylene as lining,it can improve the abrasion resistance of large-scale scraper conveyor,and then prolong the service life,reduce the friction coefficient and bring down power consumption. It has great significance for large-scalescraper conveyor.Because of these features,buried scraper conveyor gets much attention of enterprises.
 

The introduction and application of tension device

Belt conveyor is a transport machine that is driven by friction and it can transport materials continuously. Belt conveyor needs tension force in order to ensure the normal and stable operation of conveyor and meet the friction driving force between the driving drum and the belt. It is very important to choose the proper tension device when we design the belt conveyor.

Functions

1.Tension device can make the belt conveyor have enough initial tension force so that can ensure the necessary friction between belt and driving drum.It also can reserve friction to meet the requirements of friction drive of transmission drum.

2.Tension device can ensure the tension force of minimum tension point in order to satisfy the pendulous restriction conditions of conveying belt so that can make sure of the normal running of conveyor.

3.To provide the necessary route for conveyor belt joint.

Detailed rules and regulations of operational approaches

      When we turn off belt conveyor, the stored energy of conveying belt will release rapidly; and then it will damage its mechanical components and conveying belt itself, especially in the dip angle of belt conveyor and the tension device. When the belt conveyor brakes suddenly, the speed of driving drum will decrease rapidly and the linear displacement will less than the displacement of upstream drum. This characteristics will decrease the mechanical stress of upstream conveying belt and the deformation of belt will smaller, while the mechanical stress of downstream conveying belt will increase as well as deformation. That is to say,when the speed of transmission drum suddenly reduces, the returning conveying belt under the transmission drum caused by the mechanical stress of belt will be strained while returning conveying belt and upward conveying belt below the transmission drum will be relaxed because of the inertia of mechanical equipment. Thus, tension device of conveying belt should pay much attention to its deformation and brake the displacement of upstream position.