Since the establishment of the house, the 9 pumps installed by the developer have been on strike in turns, and the water taps often run “rustâ€.
In recent days, the newly established owners' committee is preparing to save itself, but it has found a truth that makes them even more embarrassing.
Residents reflected [problem 1] The yellowing of rust in tap water was “too unbearable, the pipelines often had problems, and there was rust in the taps.†Yesterday, many residents told reporters that the water quality problem was almost in the Huijing Yayuan Community in Haishu. They want to be "deserted" and leave here.
It is understood that since the handover of the house to more than three years, the pump failure in the community has occurred from time to time. The owners often reflect that the water quality is yellow and rusted, causing most of the owners' homes to have rusty toilets and faucets, and some are even blocked.
Mr. Luo, the owner, showed the reporter the “horror†moment he had photographed: He took the water from the faucet and saw it clearly. It was covered with rust. "Who would dare to drink such water?"
The side of Mr. Li confirmed that in the past two years, such "water disasters" have frequently occurred in the community. “The pipeline is often blocked. I once asked the person to clean the water heater pipe. The result was startled.†I remembered the scene at the time. Mr. Li felt sorry. “A lot of black mud washed out and turned out to be rot and rust. â€
The reporter randomly visited several residents of the community and found that they all installed water purification devices. "If you don't have this, you really can't drink water." The tenants said, "The water purifier has become the 'essential home appliance' for each of the homes here."
[Question 2] Nine Pumps In-Line Strike Reporter During the investigation, a thick stack of materials was discovered from the Property Management Department of the community. This dozens of sheets of paper are densely packed, all of which are repair records of the district's water pump. The reporter found that starting from 2008, nine of the pumps here began to repair for consecutive years, and the interval between maintenance was getting shorter and shorter. Among them, even the water pump was directly “wasteâ€.
It is understood that the district has a total of 9 pumps, divided into high, medium and low areas, the shelf life of 2 years. However, within a few days after the handover, the three pumps in the Central District experienced serious failures on several occasions. After several preliminary urgings by the property, the developer barely replaced the three problem pumps. Afterwards, the repair record was more like the “history of blood and tears†of these pumps. Not only did it fail three days, but it was not repaired.
As the pre-owned property of the community was designated by the developer of Scenery Real Estate, the cost of repairing and replacing the water pump was deducted from the community's public money. In a few years, even the maintenance belt was replaced, costing nearly 100,000 yuan, but the pump was still Take turns.
Exploration of the pump core is easy to rust rusty cast iron, according to maintenance workers, the root cause of the district rust water problem comes from the rust of pumps and pipes. The reporter came to the pump room and found that there was a pump that had just been scrapped. Parts on the floor were rusted and disassembled. Maintenance workers said that the movement of these pumps is cast iron and it is prone to rust.
In recent days, the community has established an owners' committee and several members of the industry committee have decided to conduct self-help. However, after careful investigation, they were even more surprised. They found the manufacturer “Shanghai Shangpeng Electromechanical Co., Ltd.†from the signboard above the old pump, and reported the number inside the pump to the manufacturer. However, the other party said that it was not able to find it, and it was suspected to be a counterfeit product.
At the same time, the maintenance side told them that these pumps are industrial pumps, so the use of cast iron movements, and now almost all communities use stainless steel movements, in order to ensure the health of drinking water. In addition, the reporter also learned from the property office that these old-fashioned pumps were used as wading equipment and they did not even handle the relevant health permits. The newly replaced models of new pumps had these certificates.
Developers: Not accepting the reporter's interview with the owners' committee Mr. Xiao said that they had found the manager of the developer responsible for the flood on July 29 through the “work letterâ€, but the other party ignored it.
The reporter then telephoned Hong, asking for verification. When the other party heard of the reporter’s identity, he immediately said “no interview†and hung up. The reporter then called the phone again and showed a busy tone.
At present, the industry committee of the community hopes that developers can take responsibility, solve the problem, and prepare to use legal weapons to safeguard their rights.
A shell and tube heat exchanger consists of components such as a shell, heat transfer tube bundle, tube plate, baffle plate (baffle), and tube box. The shell is mostly cylindrical, with a tube bundle installed inside, and both ends of the tube bundle are fixed on the tube plate. There are two types of fluids for heat exchange: cold and hot. One flows inside the tube and is called the tube side fluid; Another type of fluid that flows outside the tube is called shell side fluid. To improve the heat transfer coefficient of the fluid outside the tube, several baffles are usually installed inside the shell. The baffle can increase the velocity of the shell side fluid, forcing the fluid to pass through the tube bundle multiple times according to the specified path, and enhancing the degree of fluid turbulence. The heat exchange tubes can be arranged in equilateral triangles or squares on the tube plate. The equilateral triangle arrangement is relatively compact, with a high degree of turbulence in the fluid outside the pipe and a large heat transfer coefficient; A square arrangement facilitates cleaning outside the pipe and is suitable for fluids that are prone to scaling.
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