China Shandong Jianggong Machinery Co., Ltd Company News

In recent years, mini crawler excavators have rapidly emerged in the construction machinery market and become the new favorite of the industry. Its high efficiency, flexibility and energy saving characteristics make it widely used in various construction sites, farmland reclamation and municipal projects. The emergence of mini crawler excavators not only improves the efficiency of engineering construction, but also brings new development opportunities to the construction machinery market.   Mini crawler excavators have become a powerful assistant in engineering construction with their unique design and advanced technology. Compared with traditional large excavators, mini crawler excavators are more flexible and can travel and operate freely in small construction sites without space restrictions. Its small size and adjustable bucket angle allow it to easily handle a variety of construction needs, such as digging, grading and loading. In addition, small crawler excavators also have good control performance and stability, and can maintain smooth operation on uneven terrain, providing higher safety and reliability for construction.   The energy-saving and environmentally friendly features of mini crawler excavators have also attracted much attention. Traditional large excavators usually use diesel engines, which consume large amounts of fuel and cause great pollution to the environment. Mini crawler excavators use advanced electric or hybrid technology, which greatly reduces fuel consumption, reduces carbon dioxide emissions, and effectively protects the ecological environment. This is also in line with the current society's pursuit of green and sustainable development, making mini crawler excavators very popular in the market.   With the continuous development of the construction machinery market, mini crawler excavators are also constantly innovating and upgrading. Some manufacturers apply intelligent technology to the design of mini crawler excavators, giving them the ability to operate automatically and remotely. This not only improves construction efficiency, but also reduces labor costs and safety risks. At the same time, some mini crawler excavators are also equipped with multi-functional working devices, such as drilling, piling and crushing, to further meet different construction needs.   The rise of mini crawler excavators has brought new vitality and opportunities to the construction machinery market. Its high efficiency, flexibility and energy saving characteristics meet the construction party's needs for mechanical equipment, and also meet the society's requirements for environmental protection and sustainable development. It is foreseeable that small crawler excavators will continue to play an important role in the future and promote the development of the construction machinery industry in a more intelligent and green direction.  

Diesel forklifts and electric forklifts are two common types of forklifts on the market at present, and they each have some advantages and differences.   Advantages of Diesel Forklift truck: 1. Powerful power: Diesel forklifts usually have higher torque and power, suitable for carrying heavy loads or working on uneven ground. 2. Convenient refueling: diesel fuel is relatively easy to obtain, gas stations are more common, and charging equipment is relatively few. 3. Long running time: diesel Forklift has large fuel storage capacity and can work continuously for several hours without frequent charging. Advantages of Electric Forklift: 1. Environmental protection and energy saving: electric forklift does not produce exhaust emissions, no noise and vibration, environmentally friendly, and can save energy. 2. Low operating costs: Compared with diesel forklifts, electric forklifts have lower operating costs and relatively less charging costs. 3. Easy maintenance: The maintenance cost of electric forklift is low, and there is no fuel filter, air filter and other parts that need to be replaced regularly.   The difference between diesel forklifts and electric forklifts: 1. Power source: Diesel forklifts use diesel engines as power sources, while electric forklifts use batteries or electric motors as power sources. 2. Operating costs: The operating costs of diesel forklifts include fuel costs and maintenance costs, while the operating costs of electric forklifts are mainly electricity and maintenance costs. 3. Environmental impact: Diesel forklift produces exhaust emissions, causing pollution to the environment, while electric forklift has no exhaust emissions and has little impact on the environment. 4. Use scenario: Diesel forklift is suitable for outdoor or scenes that need to work continuously for a long time, while electric forklift is suitable for indoor or scenes that need low noise and no exhaust.   Diesel or electric forklifts need to be selected according to the specific working environment and needs to get the most suitable type of forklift.  

The use of mini excavators Mini excavators are mostly used in the following operations: 1.Excavation of building and factory foundations. 2.Excavate soil materials and peel off the overburden of the mining site. 3.Loading operations in quarries, tunnels, underground workshops and stockyards. 4.Excavation roads, canals and dredged waterways. 5.After replacing the operating equipment, pouring, lifting, equipment, piling, ramming and other operations can be carried out.   Classification of common small excavators There are many ways to classify small excavators, and only 5 are introduced below. That is, they are classified according to walking equipment method, transmission method, working equipment method, driving method and use.   Classification of mini excavators   1.Classification according to the method of traveling equipment: there are two types: crawler type and tire type. Crawler-type mini excavators have small ground pressure, low center of gravity, good stability, and are the most widely used. The tire-type mini excavator travels quickly and has good maneuverability.   2.Classified by transmission method: there are two types: mechanical and hydraulic. Mechanical single-bucket micro excavators rely on mechanical transmission and require various gearboxes, winches, wire ropes, hooks, pulleys and other parts. The structure is complex and has been gradually chosen among small and medium-sized single-bucket micro excavators. The hydraulic single-bucket mini excavator eliminates many complex mechanical central transmission parts, simplifies the structure, improves transmission performance, operates smoothly, operates flexibly, and has high productivity.   3.Classification according to the working equipment method: there are backhoe, front shovel, grab shovel, drag shovel and other methods. When backhoeing, the excavation direction is toward the fuselage and is used to excavate the soil below the parking surface. The operation is flexible and widely used. It is the main working equipment method among hydraulic mini excavators.   4.Classified by driving method: There are two types of mini excavators driven by internal combustion engines and mini excavators driven by electric power. Electric mini excavators are mainly used in plateau anoxia, underground mines and other flammable and explosive places.   5.Classification by use: Mini excavators can be roughly divided into different categories such as general mini excavators, mining mini excavators, marine mini excavators, and tailless mini excavators.  

1.Visual impairment The cab of the mini excavator is located on the left, and the forced arm in the center blocks the view, so there is a large blind spot on the right side (especially the rear right side). Many excavator accidents are caused by people being injured or killed when their tails rotate clockwise! Therefore, if you are working in a location that is not too large, you should place the small excavator as far away as possible, leaving more space on the right side. On a mini excavator, the rearview mirror is very weak. It often breaks down during operation or transportation. Many drivers feel it when they come into contact with it. If it doesn't matter, it won't be replaced by a new rearview mirror. In fact, the rear view mirror of a small excavator is very important, especially on the right side. Accidents are usually caused by lack of safety awareness! 2. Working in the ditch When the mini excavator is digging a trench, if the construction worker says that the front height is wrong, do not dig in the trench, but let him dig again in the trench. For him, regardless of the geology, he could only evacuate at most half of the runway separation under any circumstances. No matter how much it is, it is unsafe and at risk of collapse. Maybe the construction workers will say they can do it again. Don't listen to him because he cares more about the ditch than your safety. Qualified drivers must have their own thinking methods and safety awareness. This is fundamental professional ethics. Therefore, when digging a trench, do not go back and dig again. If you're not sure, have a builder look at a few things. If you're not sure, dig in slowly. Get out of the car and get out of the car. See the slope of the trench. If you need to go back and excavate a long distance, you will need to backfill the ditch first. It's cheesy but safe.  

Repair the cracks on the arm side plate of the mini excavator quote:   When checking whether the weld on the side panel of the welding machine is rusty, it is necessary to scratch or polish the paint or rust on the weld and hit the weld with a small hammer. If necessary, use a magnifying glass to investigate.   1.Cause of cracking   The reasons for cracks in the cantilever side plate of the excavator include the welding itself, small household excavators, as well as bubbles, slag inclusions and micro-cracks. When the excavator is overloaded, the original welds will crack and slowly expand. Cracks in the electrodes do not match the performance of the plates. Due to the large size of the excavator arm, it is difficult to choose a reliable and effective method. Heating and insulation methods. After welding, the hardened part of the base metal around the weld is not completely removed, which will reduce the welding strength: excavator. During operation, the vibration and impact are large, and the welded parts are damaged due to the uneven force on the welded parts.   2.Repair method   Preparation before welding: Use a grinding wheel to manually remove oil, paint, rust, etc. from the original weld. The boring machine cuts through weld cracks and cuts into the body of the side panels to remove hardened areas of the formerly welded base plates. After shaving, use an inclined grindstone to smooth the cut (the internal interface is polished into a V-shaped groove). After cleaning and painting, make sure you find and clean cracks.   According to the protection conditions at that time, select a 5mm electrode as the electrode, bake it at 350°C for 2 hours, and then insulate it with a welding current of 190 to 230A at 100°C to prevent the electrode from absorbing moisture. Before welding the excavator plate, the weld must be preheated to 150-250°C. During the welding process, the small orchard excavator can be welded to the segments and recycled symmetrically. Continue to be used during cooling of the weld. A hammer is used to strike the weld metal to relieve stress. When welding at the corners of side plates, in order to prevent or cause arc faults, continuous welding is required to improve joint stress.   Do you understand the modification of the mini excavator?  

What should be done when the mini excavator engine stalls? 1. Exhaust pipe Under normal circumstances, exhaust obstruction is one of the fundamental reasons for reducing fuel consumption. When the exhaust pipe is blocked, the exhaust power will directly decrease. Therefore, it is necessary to check the carbon deposits in the exhaust pipe regularly in daily work. If the back pressure exceeds 3.3 Kpa, it must be cleaned. 2. Air filter If the air filter is dusty or dusty, the filter's power will decrease linearly, thereby blocking air flow and affecting the engine's output. Therefore, the nickname must be timely. In severe cases, it can be replaced with a new air filter, air filter or filter paper. 3. Piston and cylinder liner As the machine's service life increases, the strain loss between the piston and the bushing gradually increases. Excessive wear on the piston rings can have a serious negative impact on the engine and may cause adverse effects such as ignition difficulties and incomplete ignition. Therefore, please check the cylinder liner and piston rings on time. 4. Fuel filter When air enters the fuel filter, the pipe is directly blocked and the oil passage reaches this position smoothly. This directly leads to a lack of power. In severe cases, it may affect fires. Therefore, the fuel system must be filtered in time. If necessary, you can choose to replace the new diesel filter again (filter material: glass fiber filter paper, chemical fiber filter paper, etc.). 5. Cooling and lubrication system The fundamental cause of oil overheating is a fault in the mechanical cooling system or lubrication system (circulating lubrication system, centralized lubrication system, etc.). Therefore, when the exhaust temperature of the diesel engine rises, the cooler and radiator can be checked. Clean the dirt.

The three types of filters for mini excavators are mainly air filters, diesel filters and oil filters. This is one of the tasks that our machine friends often come into contact with, but do you know these three specific filtering process maintenance methods?   The so-called "three filters" are air filter, diesel filter and oil filter connected to the air filter. The "three filters" are cleaned in a timely manner, which helps to completely improve engine performance, reduce engine failure rate, and extend engine life. The following is an engineer's introduction to a mini water conservancy excavator.   Keep the air filter of the mini excavator clean   Too many air filters will block the inflow of external air and affect the mixing ratio of air and diesel. According to inspections, about 15 grams of air are needed to completely burn about one gram of diesel fuel. If there is a lack of air in the cylinder, the mixture will not be completely burned, the diesel will be wasted, the engine will lack power, and most of the HC and CO components in the exhaust gas will also be polluted.   The air inevitably contains dust and other impurities, depending on the soil, climate and travel conditions in the area. Tests have shown that when trekking on dusty roads, the air filter can filter 0.4 to 1.8 grams of dust per cubic meter of air. In terms of chemical composition, most of this dust is silica. Once it enters the friction surface, it will penetrate the lubricating oil film, increase the wear of the engine cylinder, and shorten the engine life.  

Experts say that in general, mini excavator products do not cause fires in normal repair. In particular cases, long-term neglect, maintenance and repair is not timely. Improper operation by the operator, unauthorised modifications to the electrical system, arson and other causes are the main reasons for "spontaneous" or other fire incidents.   According to the statistics of insurance companies, most of the small excavator fires occur in the vicinity of the diesel fuel tank or engine, as well as fires, improper conversion of the electrical system, short-circuits and other causes of leakage of fuel lines. Fuse improper use of the incident ratio is very high. Although the likelihood is very small, but once it happens, the value of the mini excavator equipment more than a million dollars in economic losses is very large.   Therefore, it is particularly important to prevent and protect against this type of fire. Experts suggest that a better way to prevent spontaneous combustion of mini-excavators is to check and maintain mini-excavators on a regular basis to prevent such problems from occurring. Firstly, check the engine, hydraulic and electrical systems for leaks or deterioration. Timely cleaning of the engine system to ensure that the engine surface. Otherwise, it is necessary to strengthen the self-service operators. Many mini excavators are not equipped with fire extinguishers. In the event of an accident, the operator is unable to save lives. It is important to have fire fighting equipment, such as dry powder extinguishers, checked once a year at the local fire fighting equipment shop.   When travelling uphill, please note:   1. Check the angle of the slope to see if it is within the functional range of the excavator. If the slope is too steep, please swing the material from the upper part of the slope to the lower part to reduce the slope.   2. Remove large stones. When climbing on steep slopes, rocks can also cause the tracks to slide and then cause the excavator to move forward.   3. When climbing a slope, lower the centre of gravity of the vehicle as much as possible, extend the arm to the head and keep the bottom of the bucket at 90 degrees to the slope to prevent the bottom of the excavator from sliding into the excavator. Bottom.   4, sometimes you will encounter with the excavator climbing loose arm, the excavator can slip, in order to don't plug this situation, the weight of the mini excavator can be like this: will shovel digging as deep as possible, press on the power, when the arm to receive the head, don't spread it, let him tilt, small excavator, fireproof material along the track downward, small excavator in the back of the track to form a pile. Do not underestimate this pile of small things, you can put the excavator down permanently. When left at the bottom of the bucket and excavator without sliding down, slowly move the arm to the head and should be tied to the front. The deeper the better.  

As you know from operating a mini excavator, it is inevitable that you will need to refuel, so it is necessary to work hard to save fuel, providing you with fuel saving tips for excavator operation. Before sharing, think of yourself as an excavator, and you will better understand why. 1,When loading, the excavator should be located in a higher position, and the truck should be parked at the same height as the working platform. The reason is very simple, a stone, you lift your knee as hard as a head? How much "energy" will it save? Assuming that the height is the same, the power can be increased by 40%. 2,Each cylinder propels the excavator with maximum force when the bucket cylinders and connecting rods, the jacking cylinders and the jacking rods are all at 90°. 3,When excavating the natural ground, the bucket or release device should hold the ground angle at about 30°, and then retract the bucket lever. When the bucket lever is close to vertical, the bucket lever has the greatest force and can withstand greater loads. These two are like bending your arm to carry something, or keep your arm straight, but of course bent. 4, in use, do not extend the bucket lever out of the maximum role planning, the best role planning is about 80%. 5,Bucket shaft excavation planning: Bucket shaft from the furthest 45 ° to the inside of the angle of 30 °. Digging depth varies slightly, but the larger bucket shaft and bucket should be operated within this plan, and not at the end of the hydraulic cylinder stroke. 6, During continuous excavation, place the undercarriage forward so that you can walk immediately after excavation. If you want to walk, change it again, you will burn a lot of oil at the beginning and at the end. 7, When digging a trench, dig the ends of the trench first and then the centre. In this way, digging in the centre saves a lot of work and energy. 8, Put the engine in economy gear. Select auto-idle to allow the engine to idle while digging. 9,Minimise the radius of rotation. 10,The lower the digging depth, the better the digging economy.

Important components of the cooling system of mini excavators (1) Pump 1. Function and structure: The function of the mini excavator water pump is to pressurize the cooling water and circulate it in the cooling system. The pump is driven by a gear, and the pump speed is 1.5 times that of the diesel engine. 2 Working principle: When the pump impeller rotates, the coolant pump rotates together through the impeller, and is pushed to the edge of the pump casing through centrifugal force, and then reaches the outlet pipe through the outer tangent line of the impeller. Shell. The engine water jacket is inside. At the same time, the impeller The central pressure drops, and the coolant in the radiator tube is sucked into the pump chamber through the inlet, and the coolant circulates throughout the cooling system. (2) Thermostat 1 Function and structure: The function of the thermostat is to automatically control the flow and circulation path of the coolant according to the operating temperature of the engine. 2 Working principle: When the temperature is low, the paraffin is solid, and the main valve spring presses the main valve on the valve seat, which is in a closed state. At this time, the auxiliary valve opens and the coolant goes through a small circulation. When the temperature rises, it gradually melts into liquid paraffin, expands in volume, and generates an upward thrust at the end of the push rod. Because the push rod is fixed on the bracket, the thermostat housing moves downward, and the main valve opens to assist The valve starts and closes. When the temperature exceeds a certain value, the main valve is fully opened and the auxiliary valve also closes the pulmonary circulation channel. At this time, the cooling water of the cylinder water jacket circulates through the radiator. Some paths for water cooling system circulation are proposed. When the engine coolant temperature is within the large and small cycle temperature ranges, both the main valve and the auxiliary valve part of the thermostat are opened. At the same time, there are large and small adjustments to the engine coolant temperature to make it suitable for temperature stability. Large-scale circulation: When the engine coolant rises to a certain temperature, the main valve of the thermostat is fully opened and the auxiliary valve is closed. The coolant enters the radiator through the thermostat and radiator inlet hose. In the radiator, it cools to the The coolant from the radiator circulates around the air for cooling, and then returns to the pump through the radiator's coolant outlet hose. Small circulation: When the engine coolant temperature is low, the thermostat of the main valve is closed and the auxiliary valve is opened. After the coolant is pressured by the pump, it flows through the water jacket wall of the cylinder block and from the water jacket wall, small, small excavator The heat is absorbed then moves the cylinder head water jacket up and out of the cylinder head past the thermostat. Heats up the rear jacket wall. Then back into the pump. Measure the test parameters of the thermostatic valve, record the following data, and determine whether the values are correct. Measure the initial temperature at which the thermostat valve opens. The standard value for the thermostat valve opening temperature is 74.5 to 78.5 degrees. Measure the rise of the thermostat valve and small excavator, the temperature of the thermostat internal valve is fully opened, and the test temperature is 95 degrees. C. Thermostat test specifications. (3) Radiator The function of the radiator is to transfer the heat absorbed by the coolant to the outside air, and then reduce the temperature of the coolant. The structure of the radiator consists of upper water, lower water chamber, radiator core, radiator cover and drain switch. The function of the radiator cap is to seal the water cooling system and regulate the operating pressure of the system. (4) Cooling fan The purpose of a cooling fan is to draw air in and pass it through the radiator as the fan rotates.