In 1937, the United States established the first continuous hot-dip galvanized strip production line. In 1942, the first continuous electrogalvanized strip production line was built in the United States. It has been in production for more than 70 years since it entered industrial production.
Hot-dip galvanizing products are widely used in construction, home appliances, vehicles and ships, container manufacturing, and electromechanical industries, and are involved in all areas of clothing, food, housing and transportation. In recent years, the demand for galvanized steel sheets in the world has been increasing, and the output growth has also been rapid. In the major steel producing countries such as the United States and Japan, the proportion of hot-dip galvanized steel sheets in steel has reached 13%-15%.galvanized steel coil manufacturers
Recently, the automotive industry has paid more and more attention to the service life of materials, and the use of painted cold-rolled steel sheets has not been able to meet the corrosion resistance requirements. In this case, hot-dip galvanized sheets, which are excellent in corrosion resistance and low in cost, are generally favored by automobile manufacturers.
The greatest advantages of coated steel sheets are excellent corrosion resistance, paintability, decorativeness and good formability. In recent years, the amount of coated steel sheets in automobiles has been on the rise, and has become the main body of automotive sheets. Countries all over the world are studying how to expand the variety and specifications of coated plates, improve the coating process and improve the quality of coatings, namely corrosion resistance, anti-powdering, coating, and weldability. The formability of the plate is always an important aspect of its application, which depends mainly on the substrate properties, coating process and performance and forming process conditions, and can be achieved through comprehensive advanced technology.
The difference between the thickness of the thin-film solar panel and the crystalline silicon solar panel is most obvious. The reason is that the difference in materials depends on the difference in solar capture efficiency between the conventional crystalline silicon solar panel and the thin-film solar cell. The battery uses different compounds and the crystalline silicon solar cells use crystalline silicon wafers.
Conventional crystalline silicon solar panels use C-Si crystalline silicon. This technology has been developed for many years and is relatively mature and reliable. Although crystalline silicon has a high energy conversion efficiency, the actual light absorption efficiency is poor, which means that the solar panel must be thick enough to improve the actual efficiency. Moreover, crystalline silicon itself is very brittle and is easily broken and damaged by external force,l profile steel manufacturer so it must be encapsulated in thick float glass to protect it. This thickens the crystalline silicon solar panel and increases the weight, which seriously restricts the crystal. The use of silicon solar cells is also worrying if placed at a high level.
The thin film technology of thin film solar cells can use various elements to prepare solar cell panels by coating or depositing on the surface of glass, metal, plastics, etc. Different element materials absorb different spectral power generation of solar photovoltaic modules, and not only light absorption efficiency ratio The crystalline silicon solar cell is good, and the thickness is also about 350 times thinner than the crystalline silicon solar panel. Thin-film solar cells are usually bendable, and gallium arsenide thin-film solar cells can be tailored to their custom size and are very malleable.
The thin and light characteristics of thin-film solar cells are only a part of the advantages. High temperature resistance, low temperature resistance, no attenuation, no hot spot effect, low light power generation, pressure resistance, etc. are all unmatched by crystalline silicon solar cells, perhaps on the surface. In terms of price, crystalline silicon solar cells have a slight advantage, but smart consumers who pursue cost-effectiveness in first-tier cities have realized the superiority of thin-film solar cell technology.
With the rapid development of industry and the advancement of technology, Shuangliang clean cranes have developed rapidly and have been widely used in the clean room market. However, we must use the double beam clean hanging crane to operate according to the requirements, to ensure that the double beam clean hanging crane can be in safe and reliable operation Gantry crane single girder price. So what are the precautions for the safe use of the double beam clean row crane? Let’s take a look at it.
How to safe use of the double beam clean row crane
1. Double-beam clean hanging crane with main and auxiliary hooks. Do not raise and lower the main and auxiliary hooks at the same time. (except in special circumstances).
2. When the double-beam clean crane is driving on the line without obstacles, the distance between the hook or the spreader and the bottom of the hanging object from the ground should be more than two meters. If you need to pass over the obstacle, be sure to exceed the obstacle by a height of at least 0.5m.
3. When the double-beam clean hanging wire rope does not meet the safety requirements and there is a problem with the lifting mechanism, the cargo cannot be lifted.
4. If the weight of the hoisted cargo is half the weight of the rated lifting weight, the two mechanisms are allowed to work at the same time. If the weight of the hoisted cargo is greater than half the weight of the rated double-beam clean hoist,Dock Mobile Rubber Tyre Continuous Ship Loader, only a few mechanisms can be used. It is.
5. When the double beam clean line crane is not firmly tied, the goods cannot be lifted.
The above is a brief introduction to the safety precautions for the double beam clean row crane.
The seamless steel pipes are round, square, rectangular steel with an empty segment and no creases around it. The consistent steel pipe is a steel ingot or a consistent steel pipe which is a round, square, rectangular steel having an empty area and no crease at the fringe. The consistent steel pipe is shaped by puncturing a steel ingot or a strong cylinder clear, and afterward hot moved, cold moved steel pipe or cold drawn.
The seamless steel pipe has an empty segment and is utilized as a pipe for passing on liquid. Contrasted and a strong steel, for example, round steel, the steel pipe is light in weight when it has a similar bowing and torsional quality, and is a practical segment steel, which is generally utilized in assembling structures. Parts and mechanical parts, for example, oil drill funnels, car drive shafts, bike edges, and steel platform utilized in development.
The strong cylinder clear is punctured into a fine cylinder and after that shaped by hot moving, cold rolling or cold drawing. The consistent steel pipe has an empty area and is utilized as a pipe for passing on liquid. Contrasted and a strong steel, for example, round steel, the steel pipe is light in weight when it has a similar bowing and torsional quality, and is a conservative segment steel, which is broadly utilized in assembling structures. Parts and mechanical parts, for example, oil drill channels, car drive shafts, bike casings, and steel platform utilized in development.
The determinations of seamless steel channels are normally communicated by the external width * divider thickness (unit: mm). For example, external width 30mm internal gap 20mm divider thickness is 5mm Generally: Φ30*5. As indicated by the creation strategy, consistent steel cylinders can be partitioned into two classifications: hot-moved consistent steel cylinders and cold-moved (dial) consistent steel tubes. Hot-folded consistent steel funnels are partitioned into general steel channels, low and medium weight evaporator steel channels, high weight kettle steel funnels, combination steel channels, treated steel channels, oil breaking funnels, topographical steel channels and other steel channels.
For the most part, the seamless steel pipe is made of amazing carbon steel, for example, 10#, 20#, 30#, 35#, 45# or low-compound auxiliary steel, for example, 16Mn or 5MnV or amalgam basic steel, for example, 40Cr, 30CrMnSi, 45Mn2 and 40MnB. Cold folded into. Consistent funnels made of low carbon steel, for example, 10# and 20# are for the most part utilized for liquid passing on channels. Consistent cylinders made of medium carbon steel, for example, 45# and 40Cr are typically used to make mechanical parts, for example, parts for vehicles and tractors. By and large, consistent steel channels are required to guarantee quality and complete smoothing tests. The hot moved steel pipe is conveyed in a hot moved state or a warmth treated express; the virus rolling is conveyed in a warmth treated state.
Cranes are widely used in ports, workshops, construction sites, etc. It is a mechanical equipment for lifting and handling. Now it has been widely used in various places. What are the conditions for the use of cranes in crane rental? And what are the specific contents of it? Let’s take a look at it together. The following is a description of the “Criteria for the use of cranes in the rental of cranes and the analysis of the contents of the work”.China overhead gantry for sale manufacturer
The cranes in large crane rentals are an important part of construction engineering, and the lifting technology is also the main content of many equipment installation technologies. At the same time, large crane rentals have the following requirements for the service life of large cranes:
1. When the bottom of the workpiece is transferred by the tail row, the tail transfer speed should match the lifting speed of the crane; when the vertical device is separated from the tail row, the elevation angle should be less than the critical angle;
2. When multiple large cranes work together, they should unify the command signal and command system, and should have command rules;
3. When the double crane is hoisted, the two main cranes should choose the big crane of the same specification type. The length of the boom, the working radius, the length of the running rope of the lifting pulley block and the length of the sling should be equal;
4. When a large crane is rented with a large crane and a rotary hinge to turn the workpiece, the crane should be located on the side of the workpiece and not in the danger zone; the horizontal component of the rotary hinge should have proper treatment measures.
5. Multiple crane hoisting should be monitored and a balancing device should be provided if necessary;
6. According to three points, the principle of a rigid body in a spatial orientation is determined, and a single lifting point is adopted for the tailing;
Large crane rental considers the crane load to be a concentrated load of movement, so it is necessary to study the change of the internal force of the beam under the action of the moving load of the beam.
The crane load is the concentrated load of the two sets of movement. One set is the moving vertical load P and the other is the moving horizontal load T. T acts on the top of the beam rail and does not pass through the bending center of the beam; while the vertical force P takes into account the possible deviation of the mounting rail (generally taking a deviation of 20 mm) and also deviates from the center of the bend. Therefore, the crane beam will produce bending moment, shear force and torque under the use of the corpse and the squad.
What are the main development trends of port cranes?
(1) Develop large-scale, special-purpose loading and unloading port cranes and cranes to meet the needs of large-scale ships, bulk loading and unloading, and containerization. Such as port large-scale shore container cranes, tire gantry cranes, front lifters, high-productivity grab ship unloaders.best port crane supplier
(2) Lighten the weight of the cranes at the port cranes and realize the light weight of the cranes and cranes at the port cranes, including the adoption of new structural types, new materials, new transmission mechanisms, and new processes. For example, it is made of high-strength low-alloy steel in the metal structure of the crane. New design theories and methods such as optimized design and reliability design are used to reduce the self-weight and improve the reliability and service life of the crane.
(3) Combine lifting machinery technology with electronic technology. The single-machine design is combined with the crane mechanical operation system to apply advanced microcomputer control (PLC control), fiber optic technology, hydraulic technology, etc. to the driving and control system of the lifting machine to improve the working performance of the crane. For example, the frequency conversion speed regulation is applied in the control system of the crane, which greatly improves the stability of the crane during starting and braking, and has achieved very obvious effects.
(4) Application of ergonomics. For example, in reducing the vibration and noise direction of port crane wharf; in the reasonable arrangement and comfort of the crane cab; taking measures in the safety technology of the crane to improve the working performance and safety and comfort of the crane reliability.wall mounted jib crane
(5) Research on new handling technology. Including automated warehouses with automatic access systems, air cushion handling technology, etc. For example, a new process for the handling of large cranes in recent years.
(6) Standardization, serialization, and standardization. For example, the main performance parameters of a large number of general-purpose cranes, standardization and serialization of major mechanisms and components are of positive significance for improving productivity, reducing production costs, improving product performance and maintenance.
Before the test room of the clean room electric hoist bridge crane, it is necessary to do the inspection of the clean room electric hoist bridge crane. To ensure that all components are safe and reliable, in order to complete the lifting work safely and efficiently, what are the inspection requirements for the clean room electric hoist bridge crane before the test crane?Best Gantry Crane Manufacturer
1. Before the test room of the clean room electric hoist bridge crane, check the wire rope end of the clean room electric hoist bridge crane to ensure the connection is reliable.
2. Before the test room of the clean room electric hoist bridge crane, adjust the gap between the brake pads and the brake of the clean room electric hoist bridge crane.
3. Before the test room of the clean room electric hoist bridge crane, check whether the lubricating oil in the reducer of the clean room electric hoist bridge crane is sufficient, and ensure that the oil cups and oil passages are smooth and smooth. Make sure that the lubrication components are well lubricated.
4. Before the test room of the clean room electric hoist bridge crane, check whether the steering of the electric hoist bridge crane motor in the clean room meets the requirements. It is necessary to ensure that the two motors of the operating mechanism turn the same.
The above is a brief introduction to the inspection requirements of the clean room electric hoist bridge crane before the test.
Hydraulic lift oil pump oil leakage, noise and solutions work for a long time, some lift pumps will have many bad phenomena, such as oil leakage, noise, etc. The following lift equipment for everyone to analyze, this phenomenon and reaction mode: lifting platform Pump leakage is mainly a long-running pump, and the rotation of the rotary seal shaft of the shaft causes long-term wear. Replace the appropriate seal immediately.China Best Hydraulic Scissor Lift Manufacturer
The main reason for the pump noise of the lifting platform is as follows:
(1) The oil filter of the oil pump suction port is blocked. Increase oil resistance, resulting in increased noise. The above problem also applies to sludge stations, but when the lubrication gear is a spray gear. This makes it difficult to mix oil and air to generate noise. For example, the fuel tank is small. Can only be added to the tank correctly.
(2) The system is not sealed. The hydraulic oil draws in a large amount of air, which increases the pump noise. If the pump end cover is not tight, or the suction pipe is not tightened.
(3) Pump motor coupling gap casting has good tuning, basically 1-1.5mm. The oil pump and the motor are not on the same axis, and abnormal noise is also emitted.
(4) Oil viscosity. Especially in the winter, the oil flow is very poor, coupled with the fine oil return of the oil reducer. Pumps often take aspiration. Noise, can only increase the oil pump to the pressure reducer section of the tubing. Heat the oil to increase the flow of oil.
Parking is difficult, it is a problem that every car owner will encounter. The appearance of the three-dimensional garage has better solved the parking space problem, and also has higher requirements for the owner’s reversing technology.Best Parking Equipment System from China Manufacturer
1, three-dimensional garage parking attention to vehicle size
At present, there are two main types of stereo garages, namely, a lift-type three-dimensional garage and a building-type three-dimensional garage. Among them, the lift-type three-dimensional garage is generally seen in the basement of a large shopping mall or office building. The building-type three-dimensional garage is easy to park and will not be elaborated.
Before entering the three-dimensional garage, we must first determine the size of the parking space. Most of the three-dimensional garages have clear restrictions on the length, width and height of the vehicles parked and the weight of the vehicles. If you are driving a medium-sized car and the following class cars, the impact is not great, but if it is a large car, pay special attention to the captain’s limit. The common three-dimensional garage car length standards are 4.7 meters, 5 meters and 5.2 meters.
2, novice 90 ° straight into the library is best
After finding a suitable parking space, you can reverse the car according to your daily reversing habits. For the novice, it is best to enter the warehouse at a right angle of 90°. If you are skilled, you can reverse the vehicle.
If you plan to go straight into the warehouse, it is best to leave 2 meters on the left side of the car and 1 meter on the right side. It is more convenient to reverse the adjustment. Since the space of the three-dimensional garage is generally not too large, it is first necessary to determine that the front of the car will not be picked up, and secondly, the distance between the side of the body and the obstacle is emphasized.
However, no matter what reversing method you use, you should leave a certain distance between the body and the parking space. If space is limited, try to ensure that there is a margin of about 2 meters, which is convenient for observation and detour. At the same time, it can effectively reduce the risk of smashing on the side of the body and the garage.
3, slow speed through the limit belt
In order to prevent the vehicle from accidentally falling down in the up and down movement, the three-dimensional garage company usually designs a slightly raised limit belt behind the parking space. It needs a slight throttle to drive the rear wheel. At this time, pay special attention to the throttle force to avoid the vehicle. Backward.
The final step of parking is to let the rear wheel over the limit belt. Since the limit belt generally has a slight slope, the driver needs to add a little throttle to the throttle, but you must pay attention to the control of the throttle force. Slowly add fuel, do not directly have a big throttle, or your tail is very easy to get hurt.
4, put away the rearview mirror, slow open trunk
When the vehicle is stopped, the rear view mirror is folded first when getting off the vehicle, so that the driver and passenger can get on and off the vehicle. In addition, when opening the door, pay attention to the distance between the door and the surrounding obstacles.
If you need to take things from the trunk, when you open the trunk cover, be sure to use your hand to prevent the trunk cover from bounced and hit the guard plate above the garage or the limit lever. The model of the electric trunk cover is required. According to the actual situation, control is performed by pressing the button.parking equipment manufacturers
5, do not head the car into the inner wheel difference angle is difficult to adjust
When parking in a three-dimensional garage, don’t be advanced, because the vehicle will have an inner wheel difference when turning (the difference between the turning radius of the front wheel and the turning radius of the inner and rear wheels when the vehicle turns). After the front of the car enters the parking space, the rear end of the car cannot enter. There will be a risk of side skirts slamming the iron plate at the bottom of the parking space.
Beam type crane. It can be used in rectangular space and above, and is used for loading and unloading of goods in workshops, warehouses, open storage yards, etc. There are beam cranes, bridge cranes, gantry cranes, cable cranes, carrier bridges, etc.gantry crane manufacturers
1.bridge cranes:
A bridge crane is a type of bridge crane that runs on an elevated rail, also known as a crane. The bridge of the bridge crane runs longitudinally along the rails laid on the elevated rails on both sides. The lifting trolley runs transversely along the track laid on the bridge to form a rectangular working range, so that the space under the bridge can be fully utilized to lift the materials. Obstructed by ground equipment.
Bridge cranes are widely used in indoor and outdoor warehouses, factories, terminals and open storage yards. Bridge cranes can be divided into three types: ordinary bridge cranes, simple beam bridge cranes and metallurgical special bridge cranes.
Ordinary bridge cranes generally consist of a lifting trolley, a bridge running mechanism, and a bridge metal structure. The lifting trolley is composed of a lifting mechanism, a trolley running mechanism and a small frame.
The hoisting mechanism includes an electric motor, a brake, a reducer, a reel, and a pulley block. The motor drives the reel through the reducer to rotate the reel, and the wire rope is wound around the reel or lowered from the reel to lift and lower the weight. The small frame is a support and a frame for mounting components such as a hoisting mechanism and a trolley running mechanism, usually a welded structure.
2.beam crane: beam crane mainly includes single girder bridge crane and double girder bridge crane
The main beam of the single-girder bridge crane bridge adopts the combination section of I-shaped steel or steel type and steel plate. Lifting trolleys are often assembled with chain hoists, electric hoists or hoists as components of the hoisting mechanism.
According to the bridge support type and suspension type. The former bridge runs along the crane track on the vehicle beam; the latter bridge runs along the crane track suspended under the factory roof. Single girder bridge cranes are divided into manual and electric. Manual single-girder bridge cranes have lower working speed and smaller lifting capacity, but their own quality is small, which is easy to organize production and low in cost. When used without power supply, the amount of transportation is small, and the speed and productivity are not high. The occasion. The manual single girder bridge crane adopts the manual monorail trolley as the running trolley, and the chain hoist is used as the hoisting mechanism. The bridge frame is composed of the main beam and the end beam. The main beam is usually made of single I-beam, and the end beam is welded with steel or bent steel.electric cable hoist manufacturer
The electric single-girder bridge crane has higher working speed and productivity than manual ones, and its lifting capacity is also large. The electric single girder bridge crane is composed of a bridge frame, a cart running mechanism, an electric hoist and electrical equipment.
