PLC is a programmable controller , the scope of application is very extensive. When users use the PLC for PLC knowledge of how much it, PLC and relay advantages compared to what we all know, the following instrumentation World Network Xiaobian come to a detailed introduction about it. 1, strong function, high cost performance There are hundreds of user-programmable programming elements in a small PLC that have great capabilities for very complex control functions. Compared with the same function of the relay, with a high cost performance. Programmable controller can communicate through the network, decentralized control, centralized management. 2, complete hardware support, user-friendly, adaptable Programmable controller products have been standardized, serialized, modular, equipped with a full range of hardware devices for users to choose. Users can be flexible and convenient system configuration, composition of different functions, not scale system. Lo programming controller wiring is also very easy to install, the general use of external terminals to connect wiring. PLC has a strong load capacity, you can directly drive the general solenoid valve and AC contactor . 3, high reliability, anti-interference ability The traditional relay control system uses a large number of intermediate relays, time relays. Due to poor contacts, prone to failure, PLC software to replace a large number of intermediate relays and time relays, leaving only a small amount of input and output related hardware, wiring can reduce mutual relay control system 1 / 10--1 / 100 , Due to poor contact caused by the contact greatly reduced. PLC has taken a series of hardware and software anti-jamming measures, has a strong anti-interference ability, MTBF tens of thousands of hours or more, can be used directly in industrial production site has a strong interference, PLC has been recognized as the majority of users Reliable industrial control equipment. 4, the system design, installation, commissioning less workload PLC software replaces the relay control system with a large number of intermediate relays, time relays, counters and other devices, the control cabinet design, installation, wiring workload greatly reduced. PLC ladder program generally uses sequential control design. This programming method is very regular, very easy to grasp. For complex control systems, ladder design time than the design of the relay system circuit diagram much less time. PLC user program can be simulated in the laboratory test, the input signal with a small switch to simulate the PLC through the light-emitting diode can observe the status of the output signal. After completing the installation and wiring of the system, the problems found in the process of site tuning are generally solved by modifying the program, and the debugging time of the system is much less than that of the relay system. 5, programming method is simple Ladder is the most widely used programmable logic controller programming language, the circuit symbols and expressions and relay circuit diagram is similar to the ladder language intuitive visual language, easy to understand, familiar with the relay circuit diagram of electrical technicians just take a few days Time can be familiar with the ladder language, and used to prepare the user program. Ladder language is actually a user-oriented high-level language, programmable logic controller in the implementation of the ladder program, the interpreter to translate it into assembly language to execute. 6, less maintenance work, easy maintenance PLC failure rate is very low, and has improved self-diagnosis and display capabilities. PLC or external input devices and actuators in the event of failure, according to the PLC or LED on the programmer provides shelter quickly identify the cause of the malfunction, with the replacement of the module can quickly troubleshooting. 7, small size, low energy consumption For complex control systems, the use of a PLC reduces the need for a large number of intermediate relays and time relays. The size of a small PLC is equivalent to several relays, reducing the size of the switchgear to 1 / 2-1 / 10. The advantages of PLC and relays have been introduced over, PLC wiring wiring than the relay control system is much less, it can save a lot of wiring and accessories, reducing the installation of a large number of man hours, can reduce the cost.
1.Welding materials
In
Welding, substances called filler materials or consumables are used. As the
name implies, these substances provide filler or a body of molten materials
that provides a strong bond to be formed between the base metals used. Most
welding processes will also require some form of shielding to protect both the
main components and filler from being oxidized during the process.
The
type of welding materials used during welding depends on the nature of the job
intended. Electrodes draw the necessary energy in order to perform welding
applications. Luoyang Golden Egret Company has any kind of welding materials
include CTC Welding Rod /rope, SCTC welding rod/rope, TC electronic welding rod,
Ni-based welding rod, flux-cored Welding Wires, solid welding wires and etc.
Welding
can be applied in different kinds of industries such as building and
construction, oil and gas, marine, power generation, steel, mine tools,
automobile, transportation and etc.
2. Welding rod
1)Cast tungsten carbide based tubular
rod
The
hard phase of the rod is cast tungsten carbide which leads to higher hardness
and better wear-resistance.
Wear
resistance: the wear resistance is 6-7 times better than others. Tested by ASTM
G65
Mainly
used for Mining machinery, Geological tools, Petroleum drilling tools etc, by
Oxy-Acetylene with weak carburizing flame.
Product
recommendation:
GT1103
(CTC, 60-80 mesh),
GT1103-1(CTC, 20-30 um),
GT1103-2(CTC,
40-60 um)
2)The hard phase of tube rod is carbide
pellets which leads to higher impact resistance and better wear resistance than
CTC cloase rod.
Wear
resistance: the wear resistance is 6-7 times better than others. Tested by ASTM
G65 wear test.
Mainly
used for mining machinery. Geological tools etc; by Oxy-acetylene with weak
carburizing flame.
Product recommendation:
GT2102 (Cemented carbide grit, 30-60mesh)
GT2102-2(Cemented carbide grit, 30-40mesh)
GT2102-3(Cemented carbide grit, 40-60mesh)
3)Tube rod is composited by Cemented carbide
pellets, Spherical CTC and CTC. The layer has higher impact resistance, better
wear resistance and good fluidity than other rods.
Wear resistance: the wear resistance is 6-7
times better than others. Tested by ASTM G65.
Mainly used for oil method drill bits, such as
Tri-cone bit, Steel tooth bit, PDC bit, etc. By Oxy-Acetylene with weak
carburizing flame.
Product recommendation:
GT3302 (carbide pellets, 20-40mesh)
GT3302-1(carbide pellets, 14-40um)
4)The hard phase of the rod is monocrystal WC,
the welding layer has a higher wear resistance and better impact resistance.
The wear resistance is 6-7 times better than
others, tested by ASTM G65 method.
Mainly used for the repair and strength for oil
drills bits, such as PDC bit diameter holding by Oxy-Acetylene with weak
carburizing flame.
Product recommendation:
GT4104 (Monocrystal WC, 80-200mesh)
3. Welding Rope
Made
form mixture of CTC and self-fluxing nickel alloy covering on nickel wire. The
CTC is in spherical or irregular with good wear resistance; the nickel alloy is
in spherical or nearly spherical shape with good wettability and erosion
resistance and better corrosion resistance than tubular rod.
Recommend
to use Petroleum drilling tools, Concrete mixing blade, Mud pump, Coal sluice,
Coal drill pipe, Tunnel drilling machinery etc.
By
Oxy-Acetylene Welding with weak carburizing flame.
Product
recommendation:
GS110450N
(CTC, 4mm, HRC 47-55)
GS110550N
(CTC, 5mm, HRC 47-55)
GS110650N
(CTC, 6mm, HRC 47-55)
4. Welding Bar
The
rod is sintered by CTC and Ni-based powders. The CTC(Cast Tungsten Carbide) is
in irregular or spherical shape with better wear resistance and the nickel
alloy is in spherical or nearly spherical shape and has good wettability with cast
tungsten carbide. The cladding layer has a higher impact resistance and better
wear resistance.
Its
wear resistance and corrosion resistance is between tube rod and flexible rope.
Mainly
used on the Steel PDC bit, Concrete mixer blade, Mud pump, Miner chute, Miner
drill stem and Mechanical parts of Tunnel rock drill machine etc.
Welded
by Oxy-Acetylene with weak carburizing flame.
Product
recommendation:
GD4025253-3(CTC, SCTC, 4*600/6*600)
GD4030303-3(CTC,
SCTC, 4*600/6*600)
5. Welding wire
Intensified molybdenum titanium vanadium
composite chromium carbide welding wire can improve layer`s bonding strength
and tenacity. This wire can use for multilayer welding which has no peel off,
and it can maintain good wear resistance under certain impact working condition.
Product recommendation:GSQD671Mo-4(1.6mm)
Medium carbon and high chromium wear resistance welding wire has a higher
hardness, stronger wear resistance, and excellent toughness by adding a certain
amount of molybdenum alloys and boride. It has a better impact resistance and
strip resistance than high chromium cast iron type materials
Product recommendation: GSQD621Mo-4(1.6mm)
With
high sphericity & excellent alloy organization, cemented carbide pellet is
mainly used in welding, as an adding material of PTA Powder , tubular welding
rod, to improve the wear resistance of the workpieces greatly.
Product recommendation: GQ06
Cemented
carbide grit with different percent of cobalt has good abrasive resistance and
is widely used for making grinding, polishing and cutting tools.
Product
recommendation: GS08A
Weld Materials,Tubular Welding Rod,Welding Electrodes,Stainless Steel Welding Rod Luoyang Golden Egret Geotools Co., Ltd , https://www.lygoldentool.com
PLC and relay compared to the advantages