Notes of Ultrasonic Vibrating Screen before Using

Ultrasonic vibrating screen is a new sieving equipment compared with rotary vibrating screen, now PK Machinery will introduce the notes before using in details.

1.The input voltage of ultrasonic vibrating screen power supply is AC 220 V, ultrasonic power output is led by case back panel connection box, the red one is "+".When wiring, please pay attention to the voltage polarity, wrong wiring is not allowed.

2.In the condition of meeting the production requirements, lower power grade is better. Maximum current shouldn’t exceed 0.4.

3.When net rack is without load (the net rack is no tension), please do not start up the ultrasonic generator, otherwise it will cause overflow of power and damage of net rack and the oscillator.

4.Screen mesh must be tight, otherwise it will affect the ultrasonic output and the effect of vibration.

5.Oscillator aviation plug docking screws must be tightened and wrapped with insulating tape well, thus it will prevent dust .During operation, please pay attention to protect the connector.

6.Check whether the screw nut of oscillator and cable plug nut is tightened well or not before using, as well as the screw nut of oscillator and the net rack. In process of operation, pay attention to the protection of case and oscillator cables, cables and oscillator socket should be anti-moisture ,no water is allowed to enter in the connection plug and socket.

7.If the material is conductive, please extend the ultrasonic wire, stay the ultrasonic resonance power away from the screening site in order to prevent the material into the power case causing short-circuit.

8. When replace the screen mesh, scraping the residual gum of inner ring (resonance loop) with a sharp wallpaper knife, please do not grind by grinder wheel in order to prevent damage of resonance loop.

9.Each unit of ultrasonic generator includes a resonant power supply, an oscillator and a net rack. Please recognize each part clearly and don't mix with other ultrasonic generator.

Scraper Conveyors Designed for Power Station Was Dispatched to Ukraine Customer

This is the fifth cooperation between PK Machinery and Ukraine customer, it is not only a new milestones in power station for PK Machinery, but also promote wider cooperation between the two parties .Our customer also spoke highly of our products, we are sure we can establish long-term business relationship and realize mutual benefit.

PK Machinery is a professional manufacturer of belt conveyor, bucket elevator, screw conveyor, vibrating screenetc. applied to different industries .With rich design experience and professional service ,we are sure PK Machinery is the best choice !

Welcome to contact us if you are interest in our products.


Website:www.pkmachinery.com
E-mail: info@pkmachinery.com
Tel: +86 373 579 9188
Fax: +86 373 507 1699
Address: 289 Yellow River Road, Xinxiang City, Henan Province, China

How to Solve Rotary Vibrating Screen Clamp Gets Hot and Current Rises Problems?

Rotary vibrating screen model:XZS-1500-3
Screening material: calcium carbonate
Mesh size: mesh#100, mesh#200 and mesh#325.


Customer :The stainless clamps is very hot. Especially in the screen mesh 325. We were forced to stop the operation. What can you suggest we will do?

PK Machinery: You said the stainless clamps is very hot, normally it is caused by bolt looseness of clamp, please tighten the bolt of the clamp.

 

Customer: When it is loaded with the material for screening, the current will rise from 7.5amperes to 15 amperes. It even rises to 30 amperes and the circuit breaker of 15 amp broke. How much current reading is the normal operation?

PK Machinery: Please check whether the power wires and grounding wires are well connected or not .
Concerning the current rising, normally, current rises when the machine starts to run for seconds, it will become normal later soon.


Customer: We tried to work on the machine. Tighten the clamps, and check on the wires. Its is doing well. Thanks very much!

What Shall We do to Solve Slow Material Discharging of Rotary Vibrating Screen ?

when we handle material in our daily life, we may encounter such situation : material discharging is slow. It may cause by the reasons as following aspects:
1. Check whether the screen mesh cloth and impurity removal is level or not, or if it is over height, normally it should be higher than about 5 mm, the discharging outlet design is different according to different material types.

2.During operation, check the screen mesh surface or if the discharging outlets are in the level, this has direct relation to the sieving effect. If it is not level, please adjust timely. Rotary vibrating screen is equipped with supporting foundation bolt before leaving factory, customers can adjust the rotary vibrating screen in the level and lower it properly by adjusting the foundation bolt.

3.Besides, the key point is to adjust vibration motor upper and lower eccentric block angle, smaller angle can make the material distribute and spread outwards fast, on the contrary, larger angle will make it slow .Adjustment of the eccentric block vibration motor angle should be around 5 degrees, if you have strict requirements on screening accuracy, the angle should not be too small, otherwise the material will spread outward quickly which is not good to the screening effect. Usually ,the angle of rotary vibrating screen motor upper and lower eccentric block angle is 45 ° before leaving factory.
 

How to Replace Screen Mesh Cloth of Rotary Vibrating Screen?

There will be screen mesh damage or irregularity phenomenon if rotary vibrating sieve has been used for a long period of time, thus we need to replace screen mesh cloth, the method is shown as follows:

1. First loosen the screw of rotary vibrating screen clamp by wrench, take down the upper frame, then you can take down the damaged screen mesh cloth and put on a new mesh cloth.

2. Put the new mesh cloth smoothly on the coarse mesh cloth, then press the fine mesh cloth on the net rack by tension strip ,tighten the tension strip by using a cross screwdriver, when you are in the process of gradually tightening ,you can tension the fine mesh cloth evenly lightly by hand all round, thus the well tighten fine mesh cloth will be very flat and tight which will increase material screening percentage and achieve the ideal screening effect.

3.After the fine screen mesh cloth is well packed, leave 2 centimeters of extra mesh cloth around, then cut off the rest of them.

4. Reput the clamp between the two screen frame, tap the clamp by soft rubber hammer while tight it ,thus the bolt will be more tight. Till now the whole screen mesh cloth replacement is finished.
Note: when feeding the rotary vibrating screen, please do remember material feeding must be well-proportioned and don not feed too much material one time, otherwise it will not only affect the screening effect but also will shorten the service life of the rotary vibrating screen.

Belt Conveyors for Steel Project are Ready for Delivery

Content of project construction: 580 cubic meters of blast furnace and 120 square meters of sintering project.

On 3th June 2015,belt conveyors designed for Vietnam Hefa Phase III 70 thousand tons of steel project are ready for delivery. For this project, PK Machinery provides 38 units of belt conveyors and we are also in charged for belt conveyor engineering design, drawing delivery, fabrication ,equipment delivery and send installation personnel to site. We are sure this will lead a big step and build a solid foundation in metallurgical market!

PK Machinery is mainly engaged in manufacturing belt conveyor,bucket elevator,screw conveyor, vibrating screenetc. applied to different industries .With rich design experience and professional service ,we are sure PK Machinery is the best choice !

Installation and operation notes of rotary valve

Rotary valve is also known as discharge valve, it is mainly is used in power plants, cement plants, chemical plants etc. and dust removal industry, packing machine and professional mixing & conveying systems. Rotary valve is used for quantitative feeding and air lock when conveying dry powder material. It can also used for the lower hopper of dust collector and air preheater. It is an ideal accessory in conveying, discharging and dosing system  due to simple structure, stable performance and easy maintenance.

  

Installation notes

 1. The rotary valve must be kept clean, especially the inner body of main casing .

2.Check all fasteners to ensure the connection is reliable, the machine (including motor) is well earth grounded.

3. The upper and lower flange under of rotary valve must be fixed firmly, to make the whole machine placed inhorizontality at the same time

4.Check the wiring of motor to ensure it is able to start.

 Operation notes

 1.Pay attention that if motor is over heat when start up the power supply ,you must stop and inspect it, so as not to affect normal operation of the gearmotor.

2.Gearmotor must be operated as per the operating manual and the gearmotor rotating direction must rotate as per the arrow direction as shown.

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

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

5.During operation, if you find abnormal vibration, please stop the machine and exclude the abnormal phenomenon.

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