1. OVERVIEW OF PERMANENT MAGNETIC LIFTER
JQYD series permanent magnetic lifter is based on our company’s
general manager Mr. Xu Jun feng’s patented “Magnetic circuit
switch” technology to develop the series of patented products (The
invention patent number is 02138572.6, international monopoly main
category number: H01F7/02). The technical characteristics are as
Using double (multi) axis, double (multi) gap magnetic circuit
design, the lifter not only has a high surface magnetic field
intensity, but also simultaneously has higher magnetic field depth.
Using industrial pure iron to shield magnetic field makes the
magnetic field close at Zero magnetic field.
Using the remote hydraulic control makes it convenient to implement
Characteristics of Conventional products:
The existing products in the market are divided into two main
a) Small Permanent Magnetic Lifter: The product has high surface
attracting capacity (up to 16~25Kgf/cm2), but the use of uniaxial
and single magnetic circuit gap magnetic circuit design determines
that these permanent magnetic lifters only have surface attracting
capacity but no higher magnetic field depth. So they cannot be
applied to large-scale lifting devices. They cannot be applied to
attract the scrap steel. It is only restricted in the attracting of
small tonnage and plane materials, (attraction of plates and pieces
is≤5000Kg); Another permanent lifter of leverage structures can
only be used for attracting flat type of steel parts. And its
magnetic field cannot be closed, thus its use is very limited.
b) Conventional Lifting Electromagnets: Because of their ease to
control and advantages of large magnetic field depth they are used
in many industries.
But there are many disadvantages, such as
1. High energy consuming,
2. In need of power failure protection,
3. Magnetic hysteresis,
4. Small unit area attraction,
5. Temperature rise after long time usage
6. High maintenance cost,
7. Short life
8. A decrease in attraction capacity after long run.
All these are much familiar problems raised with lifting
electromagnets, but there is no substantial solution so far.
Therefore the JQYD series permanent magnetic lifter (Maximum
lifting force is over 100 tons) is the first of its kind at home
and abroad and can completely replace lifting electromagnet and can
be widely used in steel (iron and steel plants, steel warehouse,
steel scrap treatment plants, large foundry, etc.) shipbuilding,
heavy machinery manufacturing and other industries, port and dock
to lift and transfer the steel, iron and other magnetic components.
2.JQYD SERIES PERMANENT MAGNETIC LIFTERS CHARACTERISTICS:
1. HIGH MAGNETIC INTENSITY- uniform in entire working face: It uses
high-coercive rare earth NdFeB material, double axis, and double
gap magnetic circuit design. It not only has strong and uniform
surface attraction (maximum pull force is up to 1 8 ~ 25kgf/cm2 on
flat iron, and the rated attraction is up to 4.5 ~ 6.0kgf/cm2), but
also has deep magnetic field. So it can attract a wide range of
materials with magnetic permeability such as scrap steel, plates,
bars, steel coils structural steel and all kinds of large-scale
iron and steel parts.
2. WITHOUT EXCITATION: It is highly energy saving. Power is
consumed only during the operation of “circuit switch” (about 3KW
power for each attraction process and the work period of switch
takes few seconds, so a high amount of energy is saved).
3. HEAVY TONNAGE: JQYD large tonnage products are heavy permanent
magnetic lifters, the maximum attraction capacity of a single one
is up to over 100 tons.
4. BEING SAFE AND RELIABLE: NO power is needed for attraction, so
there is no need of power protection. In case of power or circuit
failure there is no danger of object drop as the permanent magnet
is still attracting the object. Thus there are no equipment
accidents and this assures safety. Moreover, maintenance cost is
5. Using the remote (electric) liquid PLC control makes the
operation convenient and automatic.
6. Adjustable magnetic field intensity, and it is easy to control.
The attraction towards the plate parts can be divided; also be more
than one combination, for the lifting of various lengths of steel
plate, bar, or profiles.
7. No temperature rise, and attraction is constant. In continuous
work, the attraction will not decrease.
8. NO HYSTERESIS PHENOMENON: "magnetic circuit switch" has rapid
response in attracting and discharging iron.
9. MAGNETIC FIELD CAN BE SHUT COMPLETELY: when " magnetic circuit
switch" is closed, the work area surface magnetic field intensity
will be closed to zero.
10 LONG LIFE- high coercive NdFeB rare earth permanent magnet
materials have steady performance (the decay of magnetic field of
permanent magnet will not be more than 5-8 % in 10 years).
3 MAIN TECHNICAL PARAMETERS:
JQYD SERIES Permanent Magnetic Lifter models, specification and
basic parameters are given below:
Our company was established in 1991 and passed implements
normalized and standardized management completely, passed
ISO9001:2008 quality system authentication, GSP---Good
Standardizing Practice Certificate AAA and EU CE authentication,
provincial intellectual property management system authentication,
and safety production standardization AAA authentication. Our
company specializes in iron separator and magnetic sepatarion
equipment, integrates R&D, design, manufacture, sales and
export of electromagnetic and permanent magnetic iron separator
(conventional type and explosionproof type) and permanent magnetic
Over the years, our products and service have won unanimous
applause from clients Our products have been applied in national
major projects for thousands of times. Our products has exported to
many countries and regions including Bengal, North Korea,
Indonesia, Yemen, Vietnam, Iran, Botswana, India, Philippines,
Turkey and so on.
If any interesting of our products, pls feel free to contact us,
hope to build the biz relationship with you, our dear customers.