【 Weak current College 】 elevator tenders should be aware of the problem

With the rapid development of economy, the demand for elevator products is growing. The standardization of the market mechanism, Elevator bidding and tender work requirements are also increasing. Electromechanical products bidding work, especially for the mechanical and electrical integration of elevator more closely the work product of tender organization, it should be noted that the accumulation of experience, the strokes, the bidding party in future elevator strokes, bidding work very good.

First, lift the main parameters and main performance indicators to determine

First, the tender shall be based on the premises of design parameters and conditions of use, to identify the main parameters of the procurement elevator and key performance indicators. Main parameters of the lift and key performance indicators can be based on these considerations:

1, Elevator types

National standards on elevator types are divided. If a passenger elevator, Elevator lift, beds of dual-use, freight elevator, etc.

2. rated capacity

According to the nature of buildings and traffic analysis, identify the required lift quantity and weight of single staircase up. On the General properties, currently used for elevator lifting to 1000KG, national standards is 75KG/person, this calculation down the number of single staircase with 13 people. Of course, rated capacity is an optimal sequence, we can be selected. The pursuit of luxury spacious and comfortable, rated capacity can be selected to obtain larger, such as 1350KG.

3. rated speed

Lift the rated speed of the selected request under fire, which should make the elevator in 60 seconds ran a lifting height. National standards in the elevator of the rated speed range is also provided that the above calculations on the number by series. If the building is more than one elevator is at least one should meet this requirement.

4. driving mode

Lift the drive way common with AC, ACvariable speed-speed (ACVV), AC vvvf (VVVF) and DC drives, etc. Current elevator mainstream driving mode or vvvf (VVVF), it has reliable performance, speed and high precision, comfort and energy-saving advantages.

5. control mode

Elevator control mode press the technical level and can be divided into computer group control, computer-computer set, parallel, PLC, etc. PLC programmable controller for the freight elevator, lower grade ladder. At present the main elevator product control for microcomputer control. If there are several buildings, elevators, it is recommended that a group control or parallel approach to improving efficiency. It should be noted that the elevator group control or parallel the rated speed and stop station should be consistent. At the same time control mode cannot just be content with serial communication should be used in many computer-based modular control, namely the field bus technology such as CAN, PROFI, LON, etc.

2. tender documentation

Tender documents can be divided into technical and commercial bid in two parts. Technology sign first you can set the main parameters of the previously mentioned and key performance indicators to determine the form of text, but this is far from enough to determine the required lift product characteristics, you should also note the following aspects.

1. main budget funds

In the preparation of the tender, the first thing to know about landlord investment budget of the elevator. According to the understanding of the size of the investment amount of elevator to assist owners will purchase the lift to level positioning. National and international standard only on elevator product's general performance, in particular the safety performance of the General provisions, is the minimum mandatory qualification, often do not ask for much. On the market and be able to participate in the tender of elevator products, so long as production qualified bidders, its performance index is generally able to reach the national standard requirements. Therefore, the same is the qualified products, its product performance difference is very large. Just like cars, xiali and Benz cars are able to meet the General requirements of traffic, but two car performance, quality and price are very different. Understand the owner's investment budget and purchase intent, is the basis for preparing tenders.

2. lift the overall performance of the requirements

First of all to an existing large elevator product's overall performance evaluation of technology, according to the capital budget to select a suitable lift brands and models. For technology evaluation when evaluation elevator manufacturer of industrial strength and skill levels. Not only to lift the quality of parts requested, and more importantly check the consistency of the elevator manufacturing technology, i.e. the overall technical performance. A strength of the elevator company elevator products the major part of the technical coordination between, after years of practice, combining perfectly. But the investment is small, production history short elevator company, although the main part of the elevator are configured to imported products, but it is difficult to guarantee the overall technical performance. On the import of elevator components should have a proper understanding and assessment of its quality. Especially elevators consists of more than one country or company production of parts, the overall performance of the more difficult to guarantee.

3. lift drive host-traction machine requirements

General traction motor, reducer, traction wheel and brake brake. Elevator rated speed at low speed segment (1.75M/S), pay for the worm gear speed reducers General deceleration. Rated speed at high speed section of low-grade (2.0-2.5M/S), General-bevel gear reducer or planetary gear. Rated speed at high speed section stalls (2.5M/S or more), the use of the current state-of-the-art form without gear. Tendering parties shall require suppliers to provide product identification certificate and national elevator testing center of type test report.

4. on request of Elevator Safety parts

Elevator Safety parts mainly for the following: Governor, safety clamp, bumpers, door locks, etc. With traction machine, these parts may be the supplier's own production, it may also be purchased. But in any case, should be required to produce the product type test report.

5. requirements for the elevator function

General elevator suppliers ownProduct features are divided into basic and additional two categories. We believe that the so-called basic functionality limited to meet the elevator manufacturing and installation of the security code (GB7588-2003). If the specification requirements for the elevator should have Mun. General suppliers to safety edge or light curtain or the coexistence of both to meet this requirement.

In preparation of tender documents, the basic functionality of the elevator can be optional to mention a number of requirements, General formal manufacturer will meet your requirements. For additional functionality, tendering parties you can reference a number of requirements as needed. It should be noted that additional functionality might increase costs. All requests should be in the form of a text.

6. at the request of elevator operation comfort

Determine the main elevator comfort parameter is: horizontal vibration acceleration, braking and vertical vibration, etc. These parameter values in the national standards are clearly defined. There is a problem: the determination of these values to wait until after the entire ladder put into operation. In other words, when the contract has already been completed or nearly completed. Therefore, in the preparation of the tender documents can be requested to the supplier of similar products in the whole test certificate. This certificate is issued by the National Elevator test center, you can target the data on the certificate.

7, Elevator decoration requirements

In elevator decoration of the lack of authoritative Department. General vendor to stainless steel as standard passenger elevator to spray paint plate as a freight elevator standard configuration. Supplier General are wide pre-selection for purchasing party options, such as etched decoration of stainless steel, wood, glass, mirror, marble floors, etc. These requirements may also bid party in the preparation of tender documents is to be sure.

For the gate of the decoration, the General level buyers more willing to adopt a wide door set to Deluxe. In fact, the wide door set though solemn Deluxe, but because of the construction deviations, are often so that the thickness of each layer of the doors are not completely consistent, and enable a lot of difficulty with wide door set of installation, and post-installation concave, and unsightly. Suggested bid in the first layer selection wide door set, remaining floors can be set using the narrow gate.

8, Elevator installation requirements

Elevator as a kind of mechanical and electrical products is not a complete machine factory, but rather use on-site assembling and debugging. Lines of words, the elevator was built, three-sevenths, visible on the lift the overall run installed quality so important.

In 1995, the country in the second batch extract elevator production license is expressly provided in elevator products "one-stop" service principle that elevator manufacturers responsible for elevator installation, commissioning and operation of quality. Most scale manufacturers throughout the country have their own or specified installation debugging service and maintenance teams. Local installation and debugging team should have a local provincial technical supervision departments of the qualification certificate of elevator installation and maintenance. This point should be reflected in the tender documents, is the subject of the consultation process should be clarified to select qualified installation teams.

In addition, the tendering party should be in the tender documents identified in the elevator construction conditions, such as layers high, well road section size, layer door facade sizes, room size, etc., so that vendors accurately formulated product, answer bids.

9, lift the tender business requirements

Elevator as a kind of mechanical and electrical products, orders, production, transport, inspection, maintenance, supply cycle, and other aspects of the tender file must explicitly request, signed a contract for the future. Where the supply cycle and maintenance conditions should pay special attention.

3. on the suggestion of the bidding party

Tender documents for Commerce in part should include enterprise qualification (business license, permit, etc.), and tender side of manufacturing capability, and overall skill levels, production history, etc., should also cover the supply deadline requirements, payment method etc. These elements are defined, you can explicitly request the tender documents. Some are rather ambiguous. Indeed fuzzy thing is the umpire. For example, the overall technical level and the industry are addressed. These conclusions on the evaluation of fairness is too large. To be able to bid because many bids the book establishment level say that it is one of the big reasons.

1. carefully read the tender document

Bidders purchase tenders must carefully read the tender, to review their business intelligence and product technology can meet the requirements of the tender documents. If the above two aspects vary considerably, it is recommended that you do not waste energy on offer.

-Article 2, the answering of tender documents

Bidders in reading tenders that have the capacity to participate in, they can prepare the tender documents. In preparing the document, be sure to thoroughly answer the tender documents. Bid evaluation process generally short, faced with numerous tender manufacturers, in the face of the tender documents, the judges may not answer every check, even find out there may also be omitted where these are likely to have a negative impact of the tender.

3, seeking truth from facts

Tendering parties in preparing the tender documents, be sure to seek truth from facts. Meet the requirements of the tender documents is clearly satisfied that it is not meet clearly not met and, if necessary, you can attach some explanation. Generally, only a key parameter does not satisfy it may cause feibiao. Less critical deviations only when low bit rate, causing feibiao is unlikely. The vendor must not smart to not meet also written as met. The jury of Experts judges, in their industry things to know is, is the subject of the consultation process to determine the tender's products do not have this feature. If the judges consider bidders of fraud on the influence of the bidders.

4. carefully read the tender form

Bidding form generally can be divided into domestic and international public tender open tender, competitive negotiation, etc. Bidders must seriously consider various tender, carefully considering its own commercial policy, in order to achieve a win-win situation.
　


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