Longgong liquefied natural gas loader listed

Since 2006, the national "Eleventh Five-Year Plan" and the "Twelfth Five-Year Plan" have clearly defined the specific goals for energy conservation and emission reduction. In recent years, the soaring of oil prices has further increased the demand for energy saving and consumption reduction by construction machinery users. The continuous deterioration of the environment, especially the emergence of haze around the country, has also contributed to energy saving and emission reduction as a national sport. As a large-scale construction machinery manufacturer, whether it is to adapt to the regional background, the requirements of the international environment, or to deal with increasingly fierce market competition, to meet the needs of market segments, energy-saving emission reduction is imperative. Therefore, the development of energy-saving and environment-friendly loaders is an inevitable trend in the development of construction machinery industry.

Since 2009, major domestic loader manufacturers have introduced natural gas loaders. At present, domestic natural gas loaders are classified into two types: compressed natural gas (NNG) loaders and liquefied natural gas (LNG) loaders according to their fuel types. Compressed natural gas (CNG for short) stores natural gas in a gaseous state in a container under high pressure. CNG loaders are difficult to popularize in China because of the problems of oversized gas cylinders, high supporting costs, and potential safety hazards. Currently, only a few manufacturers have retained such models. Liquefied natural gas (LNG) is natural gas that is liquefied and stored in insulated containers under ultra-low temperature (-162°C) atmospheric pressure. The storage space is only 1/3 of that of CNG, and the safety performance, supporting cost, and convenience of use are all high. Occupying an absolute advantage, it has quickly been promoted.

Longgong reviewed the situation, starting from the initial stage of the development of domestic natural gas loaders, it has been paying attention to the development of CNG and LNG loaders, and constantly conducting technical pre-research and technical reserves, with the country’s increasing attention to the environment and new energy. With the continuous increase of LNG refueling and the continuous improvement of the service network of accessories, the timing of the emergence of LNG loaders in the market is maturing. In May 2013, Longgong's first LNG loader (ZL50C-LNG) was officially rolled out. After continuous testing and improvement, the LNG loader technology has matured and now has formed three LG855B-LNG, ZL50C-LNG, and ZL862-LNG. The large series of LNG loaders and Longgong LNG series loaders are all designed and developed on the basis of mature fuel type loaders. Based on the consistent advantages of the original models, Weichai natural gas special engines and gas engine dedicated water tanks are provided. Rui large-capacity cylinders, 120-degree wide-angle camera, 9-inch rear-view display, highlights of the machine equipment:

The first is power and efficiency, and the whole machine is powerful and powerful, which is far better than the industry's level of similar models.

1. Weichai natural gas engine is used. The electronically controlled ignition system adopts the latest WOODWARD 2.0 technology and has an electronic monitoring unit (ECU) to monitor various temperature pressures, speed phases, etc. in real time.

2, with electronic throttle, precise control of the supply of gas mixture (natural gas and air) intake of the engine.

3, single-point gas injection type. A plurality of electromagnetic injection valves operate continuously, and the single point injection at the intake port of the intake manifold (that is, there is only one injection port on the intake manifold) precisely controls the supply of natural gas.

4. Closed-loop lean burn control strategy. An oxygen sensor is used to monitor the oxygen content in the exhaust. The feedback signal tells the ECU to determine the air-fuel ratio and controls the air-fuel ratio to work within the calibrated range to ensure full combustion of the fuel.

5, scientific power matching to ensure high efficiency of power transmission.

The second is high security and five security measures to effectively protect the personal and property safety of users.

1. LNG is safer than gasoline and diesel.

LNG has the highest ignition point and the lowest flame propagation speed. Its safety performance is higher than that of gasoline and diesel. Moreover, since the density of LNG after vaporization is very low, only about half of the air, a slight leak immediately flies out and does not cause an explosion.

2. Five safety guarantees for the gas supply system

1) The cylinder contains a double layer structure of the inner liner and the outer shell. The high vacuum is used between the two layers. A reasonable support system is used to fix the cylinder. The cylinder passes the 3.18 MPa test pressure, 3g acceleration vibration, 30 minutes fire, shot, 10 meters. Drop test at high altitude to ensure safety.

2) The tank is equipped with a main safety valve (opening pressure level 1.9MPa). Under overpressure conditions, the main safety valve opens and depressurizes.

3) The interior of the tank is equipped with a secondary safety valve (opening pressure level 2.85 MPa). When the main safety valve fails or becomes clogged, the secondary safety valve starts to release pressure.

4) The housing is equipped with a vacuum plug and is pressed into the vacuum plug seat by atmospheric pressure. When the sandwich vacuum environment is overpressure in the sandwich, the vacuum plug will open and release pressure.

5) An over-flow valve is provided on the external piping. When an accident occurs, the external piping is broken. When the piping flow is greater than the set value, the over-flow valve will automatically close and cut off the air flow.

The third is high economic efficiency, which is conducive to energy conservation and drastically reducing the cost of use.

1. Relative to the energy-saving fuel-type loader, the fuel cost of the LNG loader is about 43%, which is a considerable amount of data. Take the fuel cost comparison of LG855B-LNG and LG855D energy-saving loaders for one year as an example. A simple example is as follows:

Daily fuel consumption of 1900 RPM diesel engine configured by LG855D (by 8 hours)

18×8=144 L—The fuel consumption is 18L/h

6.98×144=1005.12--the price of diesel fuel is 6.98 yuan/L

Daily gas consumption of LNG engine equipped with LG855B-LNG (by 8 hours)

20×8=160 m3——air consumption is 20m3/h

3.58 x 160 = 572.8 yuan - natural gas price is 3.58 yuan/m3

Savings every day: 1005.12-572.8=432.32 yuan

One year by working 300 days, save fuel annually: 129696 yuan

2. LNG loaders use clean energy. Engine losses are relatively low, and engine oil consumption and replacement frequency are low. With the extension of the use time and the increase in the number of maintenance, the natural gas engine will be more and more obvious in terms of cost savings compared to conventional diesel engines.

3. Excluding the power system, the main components are all common with the fuel type same-model loaders, which can effectively reduce the spare parts reserve costs incurred during product switching.

Fourth, it is easy to maintain. The details of each area reflect the humanized design.

1. Various control valves, pressure gauges, filling ports and other man-machine interactive components of gas cylinders are centrally designed and are located on the left side of the cab. Each pressure gauge is clear at a glance. Each control valve, filling port is within easy reach, and maintenance is extremely efficient. Convenience.

2. The cylinder mounting brackets are all mounted and sealed panels, which facilitate internal maintenance.

3, the electronic control module is uniformly arranged in the air-conditioning box, equipped with a lock access door, easy to overhaul.

The fifth is green environmental protection, low emissions, low noise, effective protection of the environment and the operator's physical health.

LNG loaders use natural gas as a power fuel. Compared with diesel fuel, the HC in exhaust emissions is reduced by 72%, NOx is reduced by 39%, CO is reduced by 90%, and SOx and Pb are reduced to zero. The noise is reduced by 40%. Therefore, the use of natural gas fuels will play a positive role in reducing atmospheric pollution and improving the environment.

Lonking’s first LNG loader was officially launched on the market in January of this year. It has been working for more than 800 hours so far. The feedback from users is good and the work efficiency is much better than similar products in the industry. This shows that we are already saving energy and reducing emissions. A solid step has been taken. It can be foreseen that with the increasing attention of the country to the environment and new energy, the LNG service network will be increasingly perfected in China, and the LNG construction machinery market will become larger and larger. In the face of a new round of competition, Longgong LNG loaders will Continue to lead.