On the construction site of Xueyuan Road, in the face of the questions raised by Wang Shouyi and Mao Feiming, Zhao Guoyang thought about it for a while and said something.
"On the whole, there is still a certain gap between our Huaxia hoisting machinery manufacturing industry and the advanced level of foreign countries, which is mainly reflected in three aspects."
"First of all, the first aspect is that our design level is still relatively low, and there is an obvious gap between us and foreign countries in terms of product technology and development concepts."
Zhao Guoyang explained: "At present, most of our domestic enterprises generally have problems such as not having a broad product spectrum, lack of in-depth understanding of user technology, serious product convergence, and weak pertinence. ” "As far as I know, the design method of our lifting and transportation machinery in China mainly adopts a single allowable stress method.
In foreign countries, the limit state method and the probabilistic design method have been added on this basis to ensure the accuracy of the design parameter value, the selection of the safety factor and the structural optimization design. ” "This also makes our heavy machinery and equipment enterprises in China, and the products involved have many deficiencies compared to others."
Zhao Guoyang said this, Wang Shouyi and Mao Feiming, you look at me, I look at you, they all look at each other for a while.
The two of them only knew about domestic lifting machinery and equipment before, and there was a gap in quality compared with foreigners.
But where this gap comes from, they don't know very well.
At this time, after listening to Zhao Guoyang's narration, the two finally understood a little. didn't care about the long sighs of the two, Zhao Guoyang continued: "The second aspect, compared with the advanced level of foreign countries, our large construction machinery and equipment such as lifting machinery and equipment are also much worse in terms of process technology. ” "Due to the late start, coupled with the low level of the basic materials industry, most of the lifting and transportation machinery products in our country have the problems of poor quality of parts and backward technical and economic performance."
"These problems, in fact, in the final analysis, are also the backwardness of our Huaxia in production technology."
"Let me give you a few simple examples.
We are seriously lacking in high-precision processing equipment, and the reliability and performance of electrical components are low; The backwardness of thermal processing technology makes the quality of our domestic castings and forgings low, and the appearance of welded parts is not flattering," Zhao Guoyang shook his head slightly, and said honestly.
"In addition, the lack of testing instruments and equipment is also a major factor restricting the improvement of our country's technological level.
As for some special manufacturing processes that represent the international advanced level, it is even more difficult for us to get in touch, let alone research and production. ” "Researcher Zhao, you're so right."
Hearing this, Mao Feiming slapped his thigh and said, "Last time I went to Mitsubishi Heavy Industries in the island country to negotiate business, I saw the general process of their lifting and transportation machinery production. ” Mao Feiming sighed: "Actually, I have also visited several heavy industry machinery factories in China.
It's not that I'm not patriotic, but to be honest, the production level of our domestic heavy industry enterprises is really incomparable with Mitsubishi Heavy Industries."
Hearing this, Wang Shouyi nodded gloomily, speechless.
Seeing this, Zhao Guoyang coughed, and slowly said: "As Mr.
Mao said, there must be a big gap between us and the level of machinery manufacturing in developed countries. ” "But I believe that as long as we adhere to the principle of reform and opening up, go out and take a look, give full play to our own advantages, and work together to achieve mastery and mastery to control the country, there is a great opportunity to narrow the gap with the developed countries in a relatively short period of time."
When Wang Shou heard this, he glanced at Zhao Guoyang in surprise.
Although he listened to Director Li Ru's introduction to Zhao Guoyang's identity, he didn't know some of this young man's previous deeds.
Therefore, after listening to Zhao Guoyang's confident words at this time, he was a little unconvinced.
Wang Shouyi's eyes were questioning, and Zhao Guoyang could naturally see it.
He smiled, and then returned to the truth: "Director Wang, Mr.
Mao, the gap between our domestic hoisting machinery manufacturing industry and the advanced level of foreign countries is finally reflected in reliability. ” "With the development of modern industrial technology, the role of lifting and transportation machinery is getting bigger and bigger, the function is gradually increasing, and the use conditions are becoming more and more demanding."
"This makes the probability of failure of the current lifting and transportation machinery increase a lot, and the consequences are unpredictable."
Zhao Guoyang said: "At this stage, the reliability of lifting and transportation machinery is becoming more and more acute, and it has become the focus of product competition in the international market. ” After listening to Zhao Guoyang's narration, Mao Feiming sighed: "Researcher Zhao, I have a deep understanding of what you said at the end."
"Let's take our second construction in the capital as an example.
Last year, 20 cranes and 40 excavators were successively introduced from domestic manufacturers. ” "But it's only been a year, and these cranes and excavators we have introduced have already had dozens of failures.
Although some of the faults are only minor problems, it takes time and effort to solve them."
Speaking of this, Mao Feiming couldn't help but point to the independent area on the construction site.
He said helplessly: "In contrast, the three cranes introduced by our second construction in Beijing the year before last have been used continuously for so long, but there is no problem at all." ” "From the perspective of us laymen, this foreigner's product is a little bit smarter than ours, it is simply an overwhelming advantage."
Mao Feiming gritted his teeth and said: "If it weren't for the equipment imported from abroad, the price would usually be more than three or four times that of domestic production, and I would have gritted my teeth and replaced all the imported goods for everyone." ” "Researcher Zhao, you must know that the machinery and equipment on this construction site have failed, and the problem is very serious.
Stoppages and extensions are still trivial matters, and if there is a safety accident, it will be too late to regret it."
The loss and abruptness in Mao Feiming's eyes made Zhao Guoyang feel a little sympathetic to him.
After Mr.
Mao finished complaining, Wang Shouyi next to him shook his head lightly and said: "Mr.
Mao, although your words are biased, the truth is correct."
"The potential safety hazards of our domestic lifting machinery and equipment are indeed a big problem."
Wang Shouyi sighed for a long time: "In this regard, our Ministry of Construction has also communicated with Researcher Zhao and their Ministry of Machinery and Electronics Industry.
I have also formed a joint assessment team and visited the construction site below. ” "However, the results are almost the same, and there is no problem with the domestic lifting machinery and equipment and excavation machinery and equipment when they are just produced."
"But as the machine is used for more and more time, the frequency of failures increases."
Wang Shouyi sighed: "We have reported this matter to several major domestic heavy industrial giants.
But everyone has something to say, they say that the construction site is tired and uses the machine, can it not be broken?"
Hearing this, Zhao Guoyang nodded and echoed: "That's right, in the current construction of the project in China, the fatigue of the use of machines is a widespread stubborn disease. ” "However, the quality of domestic lifting machinery and equipment is also problematic" Zhao Guoyang said, while pointing to the crane that was operating over there: "It's like this kind of overhead crane, our domestic heavy industry machinery enterprises, although they are also manufactured, but its core technical level is not like that at all."
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"In this regard, there are many things worth learning from the practices of Western developed countries."
Mao Feiming was the most sad about these baby bumps on his construction site, and immediately hurriedly asked: "Researcher Zhao, where is the technology of Western developed countries, where is the strength, can these domestic enterprises really catch up?"
Zhao Guoyang affirmatively said "um": "With the increasing requirements of customers from all over the world for cranes, the development trend of bridge and gantry crane production technology has also changed greatly.
This development trend is mainly reflected in three points. ” "First of all, the modularization and combination of design" Zhao Guoyang explained: "Now when Western developed countries design cranes, they have begun to replace the traditional design method with modular design. ” "They make the components, components and parts on the crane that are basically the same function for a variety of purposes, have the same connection elements and interchangeable standard modules, and form different types and specifications of cranes through the combination of different modules."
Zhao Guoyang gave an example: "To improve the crane, you only need to improve a few modules.
And to design a new crane, you only need to use different modules to reassemble them."
In addition, the production organization of these heavy industry enterprises in the West has gradually changed from product management to module management.
This mode helps to improve the performance of the whole machine, reduce the manufacturing cost, and improve the degree of generalization. ” "In layman's terms, it is to use a small number of parts to form a series of products with multiple varieties and specifications to fully meet the needs of users."
Zhao Guoyang took a breath and continued: "The second point is the large-scale and specialized equipment. ” "Due to the continuous expansion of the world's industrial production scale, the increasing production efficiency, and the gradual increase in the proportion of material handling costs in the production process, the demand for large or high-speed cranes is also growing."
"At this stage, the lifting capacity of the crane is getting larger and higher, and the working speed is getting higher and higher.
As a result, higher requirements are placed on energy consumption and reliability. ” "Now a good crane should not only be easy to operate and maintain, but also have good safety and high reliability, and also require excellent durability, trouble-freeness, maintenance and economic use."
Zhao Guoyang said earnestly: "The diversity of modern industrial production methods and user needs has made the market for special cranes continue to expand, and the varieties are constantly updated. ” "For example, special cranes for metallurgy, nuclear power, papermaking, garbage disposal, explosion-proof, anti-corrosion, insulated cranes and special cranes for railways, ships and containers are constantly increasing, their performance is constantly improving, and their adaptability is stronger than ever":