[Haichuan’s Eye-opening] How the 15.6-meter-diameter pressure-bearing ring was put on the highway

The oversized items transported this time are* * The support ring for key core equipment required for fourth-generation nuclear power projects is also the largest diameter nuclear power support ring in the world.

As the name suggests, the support ring functions as the base of the nuclear reactor, supporting the nuclear reactor weighing thousands or even tens of thousands of tons. ”The staff member said that as the foundation of the nuclear reactor, the support ring needs to work for 60 years and cannot be replaced. It works in a very harsh environment. Because it is in direct contact with the nuclear reactor, the support ring will be heated to hundreds of degrees Celsius during operation. It also has to withstand a large amount of radiation and corrosion from possible leaked coolants. Nuclear power support rings have very high production technology requirements.

The guardrail was removed to smooth the road surface and the "big iron ring" was successfully entered on the expressway. "How can such a large piece of equipment be transported on the expressway? Do we need to dismantle the toll station?" ”After the nuclear power support ring was put on the road, it attracted the attention of many citizens and netizens. Regarding issues related to the transportation of large items, the reporter contacted Wang Bing, deputy captain of the Ninth Brigade of the Jinan Transportation Comprehensive Administrative Law Enforcement Detachment, who participated in the escort mission. “In mid-May, we received relevant investigation notices regarding the oversized transportation of oversized items. ”Wang Bing told reporters that the transportation of oversized items requires preparations in advance. After receiving the notice, Jinan's transportation department began surveying along the route.

It is understood that the outer diameter of the nuclear power support ring transported this time is 15.48 meters, and the total width after tooling reaches 15.8 meters. It has high requirements for the integrity, safety, and smoothness of the highway. “This is the first time we have encountered this kind of oversized transport. ”Wang Bing said. After connecting with nuclear power support ring manufacturers and transportation companies, Jinan's transportation department and the highway traffic police department formulated a road guarantee plan, and how to enter the highway was the key issue to be solved. “The diameter is too large, 15.8 meters, and all four lanes are occupied. It will definitely be impossible to pass through the toll station. ”Wang Bing said that in order to allow large items to get on the highway, they decided to open the guardrail in one place and make a hole to come out. After on-site investigation, a parking lot near the high-speed toll station in Zhangqiudi Town was finally selected. “This old parking lot is right next to the highway, and there is a small gap between the road and the ground. ”In order to allow the nuclear power support ring to go on the road smoothly, relevant departments filled the ditch on the side of the highway and smoothed the road surface. Restoring the scene at that time shows that on July 14, the nuclear power support ring was loaded at the Yilaite Company and the traction device was fixed. In the afternoon of the same day, after the departure work was completed, the transport vehicle towed the nuclear power support ring into the Zhangqiu Di Town yard to stand by. At 4 a.m. on the 15th, staff opened the guardrail here, and the transport vehicles started from the parking lot, preparing to enter the highway. At about 5 o'clock, with the joint efforts of many parties, the nuclear power support ring transport vehicle successfully drove onto the main expressway. The Jinan Transportation Comprehensive Administrative Law Enforcement Detachment and the Expressway Traffic Police Department escorted the vehicle until it left the jurisdiction of Jinan.

We originally had a main road that entered the factory. Because the highway crossed the road, the height of equipment entering the factory was restricted. In the end, we had to open a downward passage on the side of the road to ensure that large equipment could enter the factory.

Laoyu reports that it is an eye-opener that the transportation regulations for large items are as follows:: CB4205-2012 Safety requirements for heavy item hoisting operations DB65T 3795-2015 Logistics large item road transportation service specification DLT 1071-2014 Electric power large item transportation specification GBT 27875-2011 Port heavy item loading and unloading operation technical requirements NBT 20282-2014 Nuclear power plant large item equipment transportation investigation and evaluation technical specification QCT 1149-2021 Special vehicles for large transport

This factory also produces pressure-bearing rings for chemical equipment.