Elevator investigation report

Research report on three elevator models

Article 1: elevator report 1. The problem of collapse

Since the relocation, the problem of elevator falling into the river has always been a prominent contradiction in Dajin Xinyuan. It is often repaired and then crashes. This situation frequently occurs in 62 elevators in the community, and the elevators in the community crashed as many as 43 times during the Spring Festival. It has caused great inconvenience for residents to go upstairs and downstairs. Residents are very dissatisfied with this.

Second, the problem of being trapped.

Since the use of elevators in residential areas, the problem of trapped people has also been a prominent problem. At present, according to the elevator records and the actual situation, people are frequently trapped in every elevator, which has caused great panic to residents, especially the elderly and children. After being trapped in the elevator, people who are very scared and have a bad heart may even cause life-threatening problems. Because of the current problem of trapped people, this is a great hidden danger. During the Spring Festival, the elevator in the community was trapped three times. Compared with the zero failure rate of more than 70 elevators in Zone 1/KLOC-0 during the Spring Festival, the problem of trapped people is still the biggest hidden danger of elevator safety in Dajin Xinyuan.

Three. Damage and loss of parts

Although the replacement period of damaged elevator parts is shorter than before, it still can't meet the needs in the community, which has caused great inconvenience to residents. For example, the elevator in Unit 2 of Building 14 was damaged during the Spring Festival, and it was not until late February that the parts were replaced and returned to normal. During the period of more than half a month, residents repeatedly called the property to inquire about the situation. It caused great dissatisfaction among the residents of Unit 2 of Building 14.

Fourthly, elevator comfort.

Some elevators in the community are too noisy, and residents have repeatedly reported to the property that they are very scared when using elevators. Moreover, the noise during elevator operation seriously affects residents' rest at night, and many residents have repeatedly reflected this problem and expressed great dissatisfaction with it.

I.V. Other issues

At present, there are many other minor problems in the elevator of Dajin Xinyuan, such as the broken mirror inside the elevator, the broken lock of the control box cover in the car, the falling off of the line protection cover in the machine room and so on. Although such problems do not affect the normal operation of the elevator, as a part of the elevator, it must also ensure its normal use. Among them, the lock of the control box cover in the car has been repaired many times and has not been repaired so far.

To sum up the above problems, there are various safety hazards in the elevators of Dajin Xinyuan, and these problems are getting more and more serious, which has become the arrow of contradictions among residents, property and government. The most basic safety of residents can not be guaranteed, causing great dissatisfaction among residents. Judging from the current situation, the same problems continue to occur frequently after maintenance, reflecting that maintenance can not solve the fundamental problem of elevators. If there is no practical way, elevator safety problems will continue to occur, and residents in the community will inevitably be more excited, causing deeper contradictions and unpredictable consequences.

The above is a comprehensive report on elevator safety problems existing in Dajin Xinyuan Community so far, please review it by leaders.

Article 2: elevator survey report After many surveys, the satisfaction rate of developers after purchasing elevators is less than 50%; The user's satisfaction rate with the elevator is also less than 50%. Why is the elevator satisfaction rate so low, and how should developers choose to book elevators now? The investigation draws the following conclusions: elevator selection should focus on the following three aspects for comparison: 1, product quality 2, installation quality 3 and service quality.

I. Product quality

The top ten elevator manufacturers in China's market share (annual output) found little difference in product quality through comparison. Through the understanding of the installation company and the analysis of the products, the control system, drive system, door system and other manufacturers have no obvious advantages, but the big brand elevators have one thing in common, that is, although most parts are also "outsourced", they all have the ability to design, develop and integrate independently. Through the understanding of these brands of elevators, take the control system as an example: most of them use 32-bit CPU, and a few manufacturers use 32-bit DSP chips. But there is no obvious difference in use. Take the automobile weighing of various manufacturers as an example, most of them use relatively backward switching weighing devices, and then switch to differential transformers, and the comfort has not been significantly improved. Therefore, the quality structure of big brand elevators should not emphasize the form, but the result. Pay attention to the reliability and maintainability of products, and the most important thing in quality is integrated design.

The vast majority of small brand elevators in the market are completely "saved" because there is no research and development capability. Through the understanding of the installation companies, all the installation companies have reported that there are many parts reprocessed on the spot of small-brand elevators, which greatly affects the installation accuracy and product consistency of elevators and reduces the design quality objectives. For example, some manufacturers can't install the rotary encoder on site because of the mismatch between the rotary encoder and the traction machine, so they can only dismantle the vibration reduction, which reduces the installation quality and shortens the service life of the rotary encoder. However, the control systems of small-brand elevators are outsourced, and the outsourced control cabinets generally use computer boards and frequency converters.

However, in order to make it available to all manufacturers, most control cabinet manufacturers have wide interfaces and poor accuracy. Dozens of elevators in a residential area use a certain brand elevator in Europe. Because of the use of a control cabinet in Shanghai, there are many "soft" failures of elevators and they often "crash". Later, the manufacturer adopted its own control cabinet.

Comprehensive analysis: there is little difference in product quality between big manufacturers, but there is a big gap between small manufacturers and big manufacturers.

To judge a good elevator, it must be well designed, with short start-stop climbing time and good comfort. At the same speed, a 30-story building stopped at the middle fifth floor. Because the start-stop time is short, the time for a good elevator to reach the top is also short. As the saying goes, "you get what you pay for", which is cheap on the surface, but actually the price is higher.

Large manufacturer: 1, annual output 15000 or more; 2. There are many high-end hotels, large-scale high-end office buildings (office buildings) and other projects; According to inaccurate statistics, the major manufacturers are: Shanghai Mitsubishi, Hitachi, Xizi Otis, Tianjin Otis, Thyssen, Schindler and Huasheng Fujitsu (in no particular order).

Second, the installation quality

The biggest difference between elevators, cars and household appliances is that the assembly is done on the spot, not in the factory. In the early days, everyone knew that home appliances were both original and assembled. The price is different, so is the quality. Since the elevator is installed on site, how to control the quality?

The well-managed manufacturers are designated installation companies with detailed installation operation specifications and technical requirements. There are clear regulations from pre-installation training and preparation to intermediate inspection and completion inspection. The most important point is that the installation is not easily outsourced, and even a small number of projects entrusted for installation are strictly managed. For example, the installation of a famous brand elevator is outsourced, and 50% of the installation fee should be handed over to the factory as management fee.

I heard that the elevator is of good quality before, but it is not installed well and the elevator is not running well. It's like buying a car. The quality of the car is very good, but the quality of the car is very poor because of improper assembly, wheel deviation, windshield falling off and brake failure. Failure will affect the use, there is no difference in size, and users will see the results.

A well-managed elevator company has a complete start-up, intermediate inspection and completion report, a regular meeting system of the installation department, complete meeting records, complete video materials, well-preserved written documents with users, on-site pictures posted with safety warnings, and employees' clothes. In short, when visiting the company, you should look at several installation site files to understand the quality of installation management. In particular, check the minutes of the meeting to understand the problems discussed in the installation meeting and how to solve them.

Third, the quality of maintenance.

There is a joke in the elevator industry that "even the best elevator can stink through after-sales service". The particularity of elevator products determines that service quality accounts for a large proportion. Some people say that the perfect score of a good elevator is 100. Equipment, installation and maintenance each account for one third. Some people think that the proportion of maintenance quality is 50 points. If a TV is lucky, it may be scrapped without handling the maintenance of the manufacturer, even if it is only once or twice. But elevators are different. National regulations/kloc-maintenance within 0/5 days. It is understood that after the elevator is installed, the average user has the highest failure rate in the process of decoration and moving. According to the investigation, during the renovation of a residential area with about 10 units, 14 failures occurred within one month, almost once every two days, including voltage problems, decoration debris Carmen, elevator failures and so on. Even mature communities will have some failures.

Maintenance quality is good or bad, on the one hand, strength, on the other hand, management. Most of the elevator companies visited failed to produce the claimed ordering contract and maintenance contract. Most companies don't maintain files. Only a few elevator companies can issue maintenance records, fault records, telephone call back records and maintenance inspection reports. Most companies claim that they provide training for their employees. We can look at the training records, test scores and photos of each training to understand the company's training mechanism.

Poor and weak maintenance companies, without formal training, are like quacks, with low prices but no cure. They don't do maintenance, but maintenance. Elevator maintenance fees are like insurance in some ways. If the insurance company has no strength, it can only run away if something goes wrong. Regular maintenance companies are well-equipped and well-trained, and the cost of formal management is high, but there are few opportunities for problems. Among them, it is very unlikely that the weighing switch data will be detected once a month. Some companies have detailed regulations on the entry and exit of maintenance personnel in cars and pits, so it is credible to deal with such companies.

Through understanding: when choosing elevators, including choosing maintenance companies, we must compare several companies and inspect several companies. The exaggerated introduction of some elevator companies will be found through inspection. Give priority to manufacturers with stable annual sales growth, and compare and understand manufacturers with no performance, poor performance and short time to enter the market.

When ordering elevators and determining the maintenance company, we must pay attention to every detail.

Some views on elevator purchase;

1, elevator level positioning

Elevator grade positioning standard:

(1) The elevator production enterprise must be a professional elevator production enterprise with a registered capital of not less than 30 million yuan, and cannot be an OEM enterprise.

(2) The elevator must be a world-famous brand and have made achievements in key projects in the world or at home. (3) The important parts of the elevator should have leading technology, such as the traction machine of the passenger elevator and the sightseeing elevator is permanent magnet synchronous, and the car door machine is variable frequency voltage regulating and speed regulating door machine with light curtain protection. Safety components such as safety tongs, speed limiters and buffers must be made by professional manufacturers.

(4) It is best to use intelligent or variable frequency escalators, variable frequency passenger elevators and sightseeing elevators without machine room or small machine room.

2, the main parameters that determine the conveying capacity

Escalator: number, step width, inclination,

Elevator: rated load, rated speed, maximum lifting height, quantity, floor and stop.

3, need to focus on technical performance-reliability, advancement and comfort.

The so-called reliability refers to the ability of the elevator system to maintain the specified function within the specified time. Our requirement for elevator reliability is to have as few failures as possible during the running time. Once failures occur, they should be easily eliminated, which requires us to choose manufacturers with high credibility and good elevator configuration, and it is best to have a special maintenance team locally.

The advancement of elevator is mainly reflected in the traction and control technology, and the frequency modulation, voltage regulation and speed regulation technology (VVVF) is an energy-saving and efficient traction technology vigorously promoted by various manufacturers. The microcomputer control system realizes the intelligent control of the elevator, with low failure rate, high reliability and strong anti-interference in use.

Chapter III: Elevator Situation Report At present, elevators in residential areas have formed a stable, safe, comfortable and reliable operation and orderly situation, and the specific guarantee is embodied in the following aspects:

First of all, the elevator quality has been specially appraised and demonstrated:

In accordance with the spirit of the notice of the bureau party group meeting, the elevator supplier was informed in time, which received great attention and positive response from Yueyang Group Equipment Technology Service Co., Ltd., and invited experts and leaders of the Quality Supervision Bureau to conduct a comprehensive technical appraisal and demonstration on the quality and safety of the on-site Kone brand elevator, and clearly identified the elevator as a world-famous first-line brand with factory qualification.

Second, the after-sales service has been further strengthened:

Through in-depth contact and contact with Yueyang Sheng Qun Special Equipment Technical Service Co., Ltd., the company has taken measures such as daily inspection and tracking, real-time elimination of anomalies, and strengthening services, and achieved preventive maintenance and timely investigation. At present, the on-time service makes the elevator run in a better state.

Third, do a good job in elevator use management:

Because of the construction ladder in the early stage and the current decoration stage, the use environment of the elevator is relatively harsh, and because the property is a high-speed passenger elevator, its safety protection and comfort requirements are more sensitive, which is completely different from the freight elevator. Therefore, if the use and management are not effective, there will be uneven loading of goods, unbalanced load of the car or forced collision and extrusion of the car hall door, dust and sand falling into the car top door sill and hall door, parts being stuck or blocked, external force of goods handling colliding with the car to shift and deform, and elevator parts being soaked and oxidized by wet environment or rain, leaving man-made quality hidden dangers. This may cause abnormal operation. In view of these situations, our company has taken practical measures to avoid such phenomena as much as possible, and elevator failures have been significantly reduced.

Fourth, the propaganda work of talent training and correct use has been greatly strengthened;

Around this theme, Yueyang Sheng Qun Special Equipment Technical Service Co., Ltd. went deep into our company and organized a special training exchange meeting in time in combination with the on-site situation. Most of the field staff in our company have been systematically studied.

The explanation and training made everyone fully understand the performance characteristics of the elevator, better grasped the matters needing attention in use, and especially emphasized the emergency rescue methods for individual abnormal emergencies. And promised to cooperate with our company at any time to correctly and truly publicize and scientifically analyze the owner's doubts and concerns about elevator brand quality and abnormal phenomena, and eliminate the owner's shadow in time.

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