Sichuan, China: European Single Girder Bridge Crane Procurement Announcement

Entrusted by the owner, the bidding company released the purchase announcement of European Single Girder Bridge Crane (ZBZXJJ20210269) on the Internet on June 2, 2021. All relevant units should contact the person in charge of bidding in the announcement to carry out bidding and related work in a timely manner to avoid missing business opportunities.

Project name: European Single Girder Overhead Crane Project No.: ZBZXJJ20210269

Announcement start date 2021-06-02 08:15:43 Announcement deadline 2021-06-07 09:00:00

The purchasing unit Sichuan University means of payment for imported equipment: After signing the import agency agreement with the entrusted import agent company, Party A will pay the import project payment to the bank account designated by the agent company. The project payment is only used for the L/C or TT payment of the import project and import related expenses. After receiving the contract payment from Party A, the import agent shall timely perform the payment obligation with the foreign agent entrusted by Party B according to the requirements of the foreign trade contract. Domestic equipment: Party A shall pay the total amount of this contract to Party B at one time after the completion of acceptance and establishment of fixed assets, and Party B shall issue legal, valid and complete tax payment invoices and vouchers to Party A for payment and settlement.

Signing time requirements

Budget 230000.00CNY

Address of delivery: The arrival time of the Sky Building in Jiang'an Campus of Sichuan University is required to be within 35 working days after the transaction

Announcement description

Classification of purchase quantity UoM of purchased goods

European single-beam bridge crane 1 set of electromechanical equipment

Brand LESTE

Model Gn=10t, S=19.5m, H=6.3m

Budget 230000.00CNY

Technical parameters and configuration requirements 1 Basic requirements 1.1 The equipment must be brand new (including all parts, components and accessories) and should be made of high-quality materials; The main mechanical, hydraulic, electrical and electronic components selected shall be advanced, high-quality and reliable series products at home and abroad; The equipment has advanced structure, reasonable layout, intuitive and simple operation, and is easy to maintain and repair. 1.2 The equipment shall have sufficient rigidity, wear resistance, thermal stability and vibration resistance, and shall be able to maintain good machine performance during full load continuous operation, and can work continuously and normally. 1.3 The mechanical and electrical systems of the equipment shall be equipped with complete and reliable safety protection devices with emergency shutdown function. 1.4 The metal components of the lifting equipment (except the assembly surface and electroplating surface) shall be painted or treated with anti-corrosion measures to ensure that the Buyer is in good condition during the normal service cycle. 1.5 The lifting equipment manufacturer shall pass ISO9001 quality management system certification. 1.6 Design and manufacturing standards: design and manufacture in accordance with the national standards of the People's Republic of China (including the Code for Design of Cranes) and corresponding national industrial standards or international general standards. 1.7 Technical requirements marked with ★ are not allowed to deviate, otherwise the bid will be deemed invalid. 2 Technical requirements Specification 2.1 Technical requirements for steel structure of crane: (European single-beam bridge type) 2.1.1 The workshop length is 26.5 meters, the workshop width is 20.1 meters, the workshop height is 8.5 meters, and the corbel height is 7 meters. 2.1.2 This project is a turnkey project, including but not limited to the whole crane, track beam, track, sliding contact wire, wire and cable and other materials, transportation, installation, hoisting, inspection and detection (use registration). 2.2 Technical requirements for main beam, end beam and trolley: steel selection of crane bearing structural members shall consider the importance of structure, load characteristics, stress state, connection state and crane working environment, and the steel grade shall not be lower than Q235B. The materials used shall be provided with material reports and corresponding certificates of conformity. All steel structural parts shall be subject to surface shot blasting pretreatment after blanking, and the surface derusting quality grade shall not be lower than the Sa2.5 standard in steel surface treatment. All welds in the main stress area of the steel structure shall be subject to NDT, and the original flaw detection report shall be submitted to the Bid Inviter for retention. After the crane operating mechanism is assembled, the main beam shall be cambered. The camber in the middle of the span shall comply with 0.9 S/1000 ～ 1.4 S/1000, and the maximum camber shall be within the range of S/10 in the middle of the span (S is the span of the main beam). End beam: including crane traveling mechanism, three-in-one device (special lifting motor and reducer) is adopted. The Tenderer shall provide the crane derailment prevention scheme when bidding to ensure that the scheme is feasible. ★ The end beam and the complete trolley must be of the same brand. 2.3 Hoisting mechanism 2.3.1 Hoisting motor ★ Hoisting motor adopts variable frequency motor. The protection class is IP55, and the insulation class is F. Built-in thermistor overheat protection. The continuous rate of power connection of lifting motor is 60%. The drive system is provided with undervoltage and overcurrent protection. 2.3.2 The reducer adopts a fully sealed compact hard tooth surface (HRC58-62) gearbox, which is maintenance-free. ★ The gearbox shall not have oil leakage. In case of oil leakage during the warranty period, the Tenderer shall replace the oil for free. 2.3.3 The electromagnetic disc brake is selected as the brake, which is maintenance-free. Self-adjusting brake, automatic compensation for brake pad wear. Each independent hook shall be equipped with a braking system of 1.75 times the braking torque. The brake response time is short, and it can brake immediately after power failure without sliding. Service life of brake pad: not less than 1 million times in normal use. The mechanical normally closed design ensures that the lifting mechanism is in braking state in case of power failure to ensure safety. The motor of the hoisting mechanism shall be protected against abnormal power loss. When the motor is out of control due to the failure of the frequency converter, the brake shall be held immediately. There is no asbestos in the dust-proof structure and friction plate material. 2.3.4 The lifting height limiter is equipped with a four-stage programmable rotating limiter to realize the function of first decelerating and then stopping, to ensure that the hook operates in a safe working range, and to eliminate safety hazards such as roof punching and landing rope loosening. The upper and lower positions of the hook are set by rotating the cam point, and the hook can stop at any point during the lifting process, which is convenient for adjustment. Phase sequence protection function: when the phase sequence of the power supply line in the workshop is reversed, causing the hook to run up and down in disorder, the phase sequence protection function can effectively protect the hook from absolutely stopping when it reaches the upper mechanical position, and ensure that the hook does not hit the top. The weight limit is the second safety barrier during the lifting process of the hook, that is, when the rotating limit switch fails, the hook moving pulley block will hit the weight when it rises to 10-30mm above the upper limit position, and the weight chain will loose, causing the hammer rod to trigger the microswitch to realize power failure protection, which can ensure that the hook does not hit the top. 2.3.5 The drum and wire rope drum shall be made of high-quality thick-wall seamless steel pipe, and the surface shall be provided with pre-processed rope groove. High-strength anti-scratch wire rope is adopted, and the safety factor of the wire rope is ≥ 5. High-strength galvanized steel wire rope is adopted, with breaking force ≥ 2160N/mm2. 2.3.6 The hook block pulley meets the requirements of 006.10-87, and the hook meets the requirements of DIN15401. The hook can rotate 360 ° and adopts anti-wear roller bearing. The hook is equipped with a spring-loaded safety buckle to prevent slipping. The rated tonnage and safety signs shall be painted on the two outer surfaces of the side plates of the hook pulley block. 2.3.7 The overload automatic limiter load limit sensor is set on the bearing beam, with high triggering sensitivity, light load weighing accuracy of ± 5%, heavy load weighing accuracy of ± 2%, safe and reliable. The set value of overload protection function is: 90% overload alarm, 100% overload can fall but cannot rise, 101% overload can stop automatically, and the crane can neither rise nor fall. 2.4 Crane and trolley traveling mechanism 2.4.1 Running motor ★ The crane and trolley running motor adopts variable frequency speed regulation motor. The protection class is IP55, and the insulation class is F. The power-on duration of the drive motor of the crane and trolley is 40% ED. Built-in thermal switch overheat protection, fully sealed. 2.4.2 The traveling reducer shall be an integrated product of motor, motor brake and reducer, with a three-in-one structure. 2.4.3 The brake torque shall be at least 1.75 times of that of the motor. It can automatically adjust the braking torque according to the crane speed. 2.4.4 The wheels shall comply with the provisions of the national standard JB/T 6392-2008 crane wheels. 2.4.5 The limit switch is a two-gear cross limit switch. When the crane is about to run to the end of the track, slow down first, then stop automatically, reserve enough deceleration distance, and provide detailed layout plan when bidding. The two ends of the travel direction are equipped with trigger levers. It has automatic reset function. 2.4.6 Crane クレーントラック: including 24kg rail (national standard), pressing plate, rail connecting plate, car stop and other parts bearing crane operation. 2.4.7 Safe sliding contact line of crane: including 25 ㎡ jointless sliding contact line, bracket, collector and other parts to ensure power supply of crane. 2.5 Crane operation mode ★ The ground wireless remote control shall have the functions of start, emergency stop, safety lock, etc. on the remote controller. The remote control frequency between cranes shall not interfere with each other. 2.6 In principle, the lubrication system of the equipment shall have a complete lubrication scheme (the scheme shall be provided during bidding) except for the friction pair with self-lubrication function. For grease lubrication, recovery measures should also be taken to avoid oil dripping onto the workshop floor. All parts requiring lubrication with lubricating oil and grease shall be marked in detail on the lubrication chart, and a detailed list shall be made for the oil filling period, lubricating oil quantity, judgment standard and grease grade. 2.6.1 Grease fittings shall not be arranged in narrow areas. The filler of lubricating grease shall be unified. If it cannot be unified, the Tenderer must provide different specifications of oil gun, one for each specification. 2.7 Safety system of crane 2.7.1 General requirements: labor protection measures for human safety, protection, radiation, etc. shall comply with relevant national and industrial standards. 2.7.2 Safety and environmental protection: in addition to the separate protection of moving parts and oil, fluid, wires, cables, etc., the motor and reducer parts must be provided with reliable fully enclosed protection to ensure that dust does not invade. 2.7.3 The crane shall be equipped with a complete safety protection system, which shall at least include the following contents: it shall be equipped with an automatic overload limiter, and there shall be an overload display and an audible and visual alarm (the installation position shall be able to be seen directly below the crane). Deceleration and stop protection at the rising limit position. Automatic stop protection at the lower limit position. Detection, automatic prediction and alarm of excessive wear of lifting mechanism brake pads. The cart and trolley will automatically slow down and then stop before running to the end of the track. Photoelectric intelligent identification anti-collision device is installed between the cranes of the same span. If the crane stops operation due to fault or voltage loss during operation, and the power supply is restored, all transmission mechanisms of the crane cannot operate automatically. The mechanism can be restarted only after all controllers are set to zero manually. 2.7.4 The electrical system of the crane shall be able to realize the following protection functions: protection of the motor against voltage loss, overcurrent protection (grounding protection, short circuit protection...) phase loss protection, phase dislocation protection, zero position protection, overheat protection 2.7.5 The emergency stop button equipment must have a main emergency stop switch, with eye-catching position, convenient for emergency operation, and the color is red. Emergency stop button shall be set on the wireless operating handle and wired operating handle of the crane. In all operation modes of the equipment, the emergency stop function shall take priority over other functions. The emergency stop button shall have self-locking function. Before the emergency stop button is reset, any operation on the equipment shall be invalid. 2.7.6 The surface edges on the crane body shall be chamfered. The surface on the equipment that may be in direct contact with the human body should not have sharp corners or sharp protrusions to prevent personnel from scratching. 2.7.7 The noise sound pressure level of the crane trolley during stable operation shall not exceed 80 dB, and the noise sound pressure level of the lifting mechanism during operation shall not exceed 80 dB. 2.8 Technical requirements for electrical control system 2.8.1 Workshop power supply: three-phase four-wire system, national standard voltage variation range: 380V ± 10% 50HZ ± 1%. 2.8.2 Power supply protection The power supply of the complete machine is controlled by the main circuit breaker that can be manually disconnected. The circuit breaker must have the isolation function, so that the power supply of the crane can be conveniently cut off during the maintenance of the crane or when the crane is not working for a long time. The control of the main circuit breaker shall have the function of electromagnetic tripping, its rated current shall be greater than the rated working current of the crane, and its setting value of electromagnetic tripping current shall be greater than the maximum working current of the crane. The arc-breaking capacity of the main circuit breaker shall be able to break the short circuit current occurring on the crane. The main circuit breaker should also have the function of voltage loss protection. When the power supply of the crane is interrupted, the circuit breaker should automatically trip. When the power supply of the sliding contact line is restored, the circuit breaker must be manually reset to restore the power supply of the crane. After passing through the main circuit breaker, the power supply circuit is connected to the main fuse, and then to the main contactor controlled by the emergency stop button and other protection systems, followed by automatic protection switches at all levels. 2.8.3 Internal power supply specification of equipment control system requires power supply circuit: AC380V × 50Hz × 3Phase。 Incoming power supply: AC380V × 50Hz × 3Phase。 It is necessary to ensure sufficient power output when the lifting mechanism and the trolley traveling mechanism operate simultaneously. 2.8.4 Identification of electrical components All cables, components and cabinets must be clearly numbered. The sign shall be fixed firmly and not easy to fall off. The text on the sign shall be clear and easy to recognize. Handwriting is not allowed, and the marking machine must be used for printing. The reading method of number identification is generally from left to right (from insulation end to wire nose direction), and cannot be reversed. The number on the identification must be consistent with the contents of relevant procedures, drawings and data. The wiring in the motor junction box should also have the same wire number as the drawing. 2.8.5 The motor control system shall have the following protection functions: overcurrent protection. Thermal sensor element or thermal overload protection device shall be installed in the motor. 2.8.6 Each application unit with front and back or reverse action logic relationship of interlocking protection must have reliable interlocking relationship, and front and back can not produce misoperation. For example, electric interlock shall be provided to control the forward and reverse rotation of the motor. 2.8.7 The control system of the equipment shall be designed with self-diagnosis function. When the equipment fails, it can inform the operation and maintenance personnel of relevant fault information through fault code and other methods. At the same time, it is necessary to consider possible misoperation and design corresponding software and hardware protection system to avoid equipment and personnel damage caused by misoperation. 2.9 Identification 2.9.1 The factory identification of the crane shall be installed on the obvious position of the main beam of the crane. The nameplate shall at least indicate the following contents: the name and trademark of the manufacturer. Product name, model and manufacturing date. Factory number, production license number and work level. Rated lifting capacity, span, lifting height and working speed. 3. Inspection and acceptance of the equipment before delivery The Buyer has the right to inspect and test the equipment to confirm whether the equipment meets the requirements of the technical specifications of the contract, and will not bear additional costs. The inspection and test shall be carried out at the equipment manufacturer and the place where the equipment is used. The inspection and test conducted in the equipment manufacturer is pre-acceptance, and the Buyer's inspectors shall be able to obtain all reasonable facilities and assistance. 4. Installation, commissioning and acceptance 4.1 After the equipment arrives at the Buyer's site, the Buyer shall organize personnel to unpack and inspect the goods, and the Seller shall send inspectors to the site to participate in the inspection. If the equipment is found to be damaged, defective, short or not in conformity with the provisions of this bidding document, the inspectors of both parties shall make detailed records, and the Buyer and the Seller shall