CB/T 3492-1992 Technical requirements for installation of marine jib cranes
Some standard content:
Shipbuilding Industry Standard of the People's Republic of China
CB/T3492—92
Technical requirements for installation of marine jib cranes
Published on July 4, 1992
Published by China State Shipbuilding Corporation
Implemented on February 1, 1993
Shipbuilding Industry Standard of the People's Republic of China
Technical requirements for installation of marine jib cranes
1 Subject content and scope of application
This standard specifies the conditions and methods for factory assembly and shipboard installation of marine jib cranes. CB/T3492—92
Classification number: U22
This standard applies to all types of cranes specified in GB/T12932 "Marine jib cranes". Other types of marine cranes can be implemented as a reference.
2 Reference standards
GB1804 Tolerance and fit Limit deviation of dimensions without tolerance GB2900.1 Electrical terminology Basic terminology GB6974.1～6974.19 Hoisting machinery terminology GB11637 Factory test method for marine hydraulic jib crane GB/T12932 Marine jib crane
CB/T3490 Technical conditions for painting of marine jib crane 3 Terminology
This standard adopts the terminology of GB6974.1～6974.19 and GB2900.1. 4 Preparation before assembly
4.1 Requirements for assembly site
4.1.1 The assembly site must be clean and well-lit. 4.1.2 Appropriate space should be left around the assembly site, and the parts and components required for assembly and purchased accessories should be classified and stacked neatly. Important parts should be placed on shelves to ensure smooth assembly work. 4.1.3 The assembly of hydraulic components and electrical components shall have a dedicated workshop and assembly platform, and the workshop shall have dust prevention measures. 4.2 Requirements for assembly tools and gauges
4.2.1 Before assembly, the jigs, fixtures, hoists and standard tools and special tools required by mechanical, electrical and hydraulic assemblers to ensure the quality of assembly shall be prepared.
4.2.2 Before assembly, it is necessary to check whether the gauges used have been identified and are within the validity period. The accuracy shall meet the design requirements of the drawings. 4.2.3 The test instruments used for assembly shall be identified and within the validity period. The accuracy shall meet the level specified in the drawings and technical documents. 4.3 Requirements for parts and purchased accessories
4.3.1 The parts used for assembly must be qualified after inspection. Those that have not been inspected shall not be put into assembly. 4.3.2 Purchased accessories must have a product certificate and undergo pre-warehousing inspection. They can only be put into warehouse after passing the inspection. All important accessories that must be approved by the ship inspection according to the ship inspection regulations must have a ship inspection certificate and a ship inspection steel stamp mark. 4.4 Qualification of assembly personnel
4.4.1 All main assembly personnel participating in mechanical, electrical and hydraulic assembly and commissioning must be skilled workers who have been engaged in professional assembly practice for more than five years and have obtained intermediate technical certificates or received special assembly technology training. Approved by China State Shipbuilding Corporation on July 4, 1992 and implemented on February 1, 1993
CB/T3492-92
4.4.2 Crane operators and crane operators who cooperate with assembly must hold a "special operation operation certificate" issued by the labor department and be within the prescribed validity period before they are allowed to work.
5 Assembly in the factory
5.1 General requirements
5.1.1 Assemblers should first read the drawings and process documents, and understand the structural principles of the selected hydraulic and electrical components. Any questions should be raised to the design and process personnel, and assembly can only be carried out after receiving a clear answer. 5.1.2 The assembly of components should be carried out strictly in accordance with the provisions of the drawings and process documents, and no situation inconsistent with the provisions of the drawings and process documents is allowed.
5.2 Mechanical assembly
5.2.1 Before assembly, the parts and purchased accessories to be assembled should be carefully cleaned, and no Oil stains, iron filings and other dirt are allowed. The sharp corners of the mating parts should be rounded off to remove edges and burrs. Parts with defects such as bumps, scratches, rust, etc. that may affect the assembly quality shall not be put into assembly. 5.2.2 For all parts with matching requirements, the dimensions of the matching parts should be checked with a suitable base before assembly, and records should be made and filed for future reference. 5.2.3 The hoisting mechanism and luffing mechanism winches should be installed according to the direction of drum rotation specified in the drawings. The external brake device should be cleaned of oil stains, oil stains and other dirt on the contact surface of the brake belt, and the distance on both sides of the brake belt should be adjusted to be equal during installation. The gap when the brake belt is loosened should comply with the requirements of the drawings.
When installing the slewing bearing, the heat-treated soft belt mark of the large gear ring should be at 90° to the direction of the boom, and assembled after positioning. 5.2.5
Slewing The tooth side clearance between the pinion of the mechanism and the large gear ring of the slewing bearing shall be implemented in accordance with the provisions of the drawings or technical documents. 5.2.6
The installation and tightening of the wire rope shall be carried out in accordance with the correct methods specified in the drawings or technical documents. 5.2.7 All parts with high-strength bolt connections, such as slewing bearings, lifting mechanisms, slewing mechanisms, booms and the lower capstan of the tower body must be tightened with bolts strictly according to the preload force or preload torque specified in the drawings and marked. The threaded part of the bolt should be lubricated and the bolts should be tightened in a symmetrical order.
5.2.8 The hydraulic or electrical limit switches should be installed correctly and a continuity test should be performed after assembly. 5.2.9 All screw holes and lubricating oil holes should be blown clean of iron filings, dust and other debris with compressed air before installation. 5.3 Assembly of hydraulic system|| tt||5.3.1 The layout of the hydraulic system pipeline should be correct, beautiful and neat. 5.3.2 Various hydraulic components and pipes (including hoses) used for assembly should be thoroughly cleaned and blown dry with compressed air. The exposed connection holes should be sealed with tape and allowed to be disassembled only when connected. Welded steel pipes should be pickled and passivated and anti-rust measures should be taken immediately. Steel pipes must be subjected to a static pressure test of 1.5 times the working pressure. No leakage is allowed during the test time of 5 minutes. 5.3.3 Before assembly, check whether the connection ports of each hydraulic component have marks indicating various functions. If any omissions are found, permanent marking symbols that conform to their functions should be added.
5.3.4 The digital hydraulic hose should be fixed with a pipe clamp that matches the hose diameter. If the structure does not allow, it can be fixed with a cable tie. The distance between pipe clamps should be 300-500mm. The pipe clamps installed outside the tower body and the welding plate and the connecting bolts should be coated with rust inhibitors. The hose bends must be fixed with pipe clamps, and the minimum bending radius of the hose should comply with the provisions of Table 1. Table 1
Inner diameter
E, N type
Note: Type 1
CB/T3492-92
Continued Table 1
Hydraulic hose with 4 layers of fine steel wires and reinforcement; Hydraulic hose with 4 layers of medium-thick steel wires and reinforcement; Hydraulic hose with 4 layers of thick steel wires and reinforcement; Type N-wwW.bzxz.Net
Hydraulic hose with 6 layers of thick steel wires and reinforcement. Small
5.3.5When installing threaded joints, sealant should be applied. Threaded joints must be tightened and marked at any time. 5.3.6
I, N type
When installing hydraulic components and hydraulic pipelines, they must be connected strictly according to the connection ports marked on the hydraulic system schematic and layout diagram. Both ends of the hydraulic hose should be marked with codes consistent with the requirements of the drawings, and records should be kept. 5.3.7
The assembly content list of the hydraulic hose should be carefully filled in during the assembly process. The filling content is as follows: Hydraulic hose model;
Hydraulic hose length:
Hydraulic hose code:
Hydraulic hose fittings model at both ends;
Hydraulic components and interface names at both ends of the hydraulic hose. This assembly content list should be in duplicate, one copy is kept by the manufacturing department, and the other copy is submitted to the inspector for filing after acceptance. 5.4 Electrical system assembly
The electrical system installation shall comply with the relevant provisions of the China Classification Society's "Steel Seagoing Vessel Classification and Construction Rules". 5.4.2
Before assembly, carefully check whether the model, voltage, frequency and appearance quality of all electrical components and electrical parts meet the requirements of the drawings. 5.4.3
Cable laying
Cables should be installed on cable guides, except for special cases such as space turns or transitions into electric control boxes. Cables are generally laid flat on cable guides in a single layer. When necessary, the cables can be overlapped and laid flat, but not more than three layers. After installation, the cables should be fastened with insulated steel tie straps and buckled on the cable guides. The spacing between the tie straps should not be greater than 300mm. Places where workers can easily step on their feet should be laid through pipes or covered on the cable guides. When laying cables, the minimum bending radius should comply with the requirements of Table 2. Table 2
Thermoplastic material
Elastomeric material
Outer sheath
Metal sheath, armor or braid
Other protective layer
Hard metal sheath
Total outer diameter of cable
Any size
Any size
Minimum bending radius
CB/T3492--92
5.4.3.6 When the cable is located outside the crane tower and the space it passes through is large, the cable passes through the metal pipe, and protective sleeves are added to both ends of the metal pipe or cable fixing devices are added at 10mm, and the corresponding pipe clamps and welding plates are fixed to the metal plate wall. 5.4.3.7 When the external cable must pass through the metal plate wall, a stuffing box should be used. 5.4.4 Cable installation
5.4.4.1 A stuffing box or enclosure should be used for the cable entry of the electric control box. The cable inserted into the electric control box should be stripped of its outer sheath. When stripping, the insulation layer of the core wire should be prevented from being scratched. The length of the core wire entering the electric control box should be sufficient to reach the terminal block, and an appropriate margin of about 0.5m should be left. It should not be too tight. 5.4.4.2 During assembly, the core wire should be covered with a sleeve with a number consistent with the provisions of the electrical wiring diagram. The number should be consistent in direction to facilitate manual installation and maintenance.
5.4.5 Stuffing box installation
5.4.5.1 Select the matching stuffing box correctly according to the drawing provisions or the outer diameter of the cable. 5.4.5.2 When installing the stuffing box, apply rust preventive agent to the threaded end of the stuffing box. When installed on a threaded wall hole, the threaded end of the stuffing box can be directly tightened, and looseness is not allowed. When installed on a bare wall hole, tighten it with the nut on the stuffing box, and looseness is not allowed. 5.4.5.3 The head of a stuffing box (nut end) should be installed on the outside of the electric control box, tower body and other metal structural parts. If it is inconvenient to install some parts, it can be handled separately.
5.4.5.4 When the cable without shielding layer passes through the stuffing box, take out the two copper clamps in the stuffing box, put a suitable rubber gasket on the cable insulation layer, and fix the cable in the stuffing box hole. 5.4.5.5 When the cable with shielding layer passes through the stuffing box, the shielding copper wire must be arranged flat and clamped in the two copper clamps of the stuffing box. 5.4.5.6 After the cable is tightened through the stuffing box, all stuffing boxes must be sealed with sealant, and the empty stuffing boxes must be sealed with rubber to enhance the watertight performance of the electric control box and other electrical components. 5.5 Others
5.5.1 All steel structure installation parts on the crane, such as ladders, platforms, railings, etc., should be pre-installed and marked with permanent matching marks to ensure a successful installation on board.
5.5.2 After the doors and windows on the cab and tower are installed, a watertight test shall be carried out in accordance with Article 3.2.12 of GB11637. 5.5.3 If welding is required during the assembly process, welding slag, smoke, burnt paint film and other debris must be strictly cleaned after welding, and the primer must be applied immediately. When drilling is required, burrs must be removed after drilling. 5.5.4 After assembly, the tower body and the interior of the cab should be carefully cleaned. The inside of the hydraulic oil tank must be cleaned intensively, and no dirt that affects the normal operation of the hydraulic system is allowed to exist. Only after cleaning is it allowed to pour the filtered hydraulic oil to the specified oil level, and the filtration accuracy and hydraulic oil brand shall comply with the requirements of the drawings or technical documents. 6 Installation on board
6.1 During installation on board, check whether the joint surface between the base column and the slewing bearing is flat. The gap between the two contact planes shall be carried out in accordance with the requirements of the drawings or technical documents, and it must be ground if it is found to be inconsistent with the requirements. 6.2 Before the tower is hoisted, the base column platform and the slewing bearing connection platform should be carefully cleaned to ensure that there is no rust, paint, oil stains or other debris. 6.3 If the installation on the ship requires welding parts on the tower, the grounding wire must pass the slewing bearing and connect to the tower, and it is not allowed to be directly connected to the base column.
6.4 All high-strength bolt connection parts shall be implemented in accordance with the provisions of Article 5.2.7. 6.5 The electrical and hydraulic pipelines can be connected and assembled only after the mechanical assembly of the tower body and the base column, and the tower body and the boom is completed and inspected and qualified. 6.6 After the installation on the ship is completed, it should be cleaned again in accordance with the requirements of Article 5.5.4, and hydraulic oil should be poured after completion. 7 Lubrication, oil seal and painting
7.1 After the crane is assembled, all rotating parts and bearings must be lubricated. 7.2 Each gear transmission mechanism should be filled with lubricating oil to the specified oil level. 7.3 All exposed non-machined surfaces should be sprayed with paint to prevent rust. The specific specifications shall be implemented in accordance with the provisions of CB/T3490. The machined surface of table 4
should be oil sealed.
8 Inspection
CB/T3492—92
After installation, the correctness of the installation of mechanical, electrical and hydraulic systems should be checked. Before power on, the electrical insulation performance should be checked to see if it complies with the requirements of the drawings and technical documents or relevant electrical specifications. After the inspection, the inspection record should be filled in and filed for future reference. Additional remarks:
This standard was proposed by the Deck Machinery Sub-Technical Committee of the Marine Machinery Standardization Technical Committee. This standard is under the jurisdiction of the 704th Institute of the 7th Research Institute of China State Shipbuilding Corporation. This standard was drafted by the Oasis Machinery Factory of China State Shipbuilding Corporation and the 603th Institute of China State Shipbuilding Corporation. The main drafters of this standard are Hao Jianer, Wu Rongmu and Zhou Yuhua.7. 6.5 The electrical and hydraulic pipelines can be connected and assembled only after the mechanical assembly of the tower body and the base column, and the tower body and the boom is completed and inspected and qualified. 6.6 After the installation on board is completed, it should be cleaned again according to the requirements of 5.5.4, and hydraulic oil should be poured after completion. 7 Lubrication, oil seal and painting
7.1 After the crane is assembled, all rotating parts and bearings must be lubricated. 7.2 Each gear transmission mechanism should be filled with lubricating oil to the specified oil level. 7.3 All exposed non-machined surfaces should be sprayed with paint to prevent rust. The specific specifications shall be implemented in accordance with the provisions of CB/T3490. The machined surface should be oil sealed.
8 Inspection
CB/T3492-92
After the installation is completed, the correctness of the installation of the mechanical, electrical and hydraulic systems should be checked. Before power is turned on, the electrical insulation performance should be checked to see if it meets the requirements of the drawings and technical documents or relevant electrical specifications. After the inspection is completed, the inspection record should be filled in and filed for reference. Additional Notes:
This standard was proposed by the Deck Machinery Sub-Technical Committee of the Marine Machinery Standardization Technical Committee. This standard is under the jurisdiction of the 704th Institute of the 7th Research Institute of China State Shipbuilding Corporation. This standard was drafted by the Oasis Machinery Factory of China State Shipbuilding Corporation and the 603rd Institute of China State Shipbuilding Corporation. The main drafters of this standard are Hao Jianer, Wu Rongmu and Zhou Yuhua.7. 6.5 The electrical and hydraulic pipelines can be connected and assembled only after the mechanical assembly of the tower body and the base column, and the tower body and the boom is completed and inspected and qualified. 6.6 After the installation on board is completed, it should be cleaned again according to the requirements of 5.5.4, and hydraulic oil should be poured after completion. 7 Lubrication, oil seal and painting
7.1 After the crane is assembled, all rotating parts and bearings must be lubricated. 7.2 Each gear transmission mechanism should be filled with lubricating oil to the specified oil level. 7.3 All exposed non-machined surfaces should be sprayed with paint to prevent rust. The specific specifications shall be implemented in accordance with the provisions of CB/T3490. The machined surface should be oil sealed.
8 Inspection
CB/T3492-92
After the installation is completed, the correctness of the installation of the mechanical, electrical and hydraulic systems should be checked. Before power is turned on, the electrical insulation performance should be checked to see if it meets the requirements of the drawings and technical documents or relevant electrical specifications. After the inspection is completed, the inspection record should be filled in and filed for reference. Additional Notes:
This standard was proposed by the Deck Machinery Sub-Technical Committee of the Marine Machinery Standardization Technical Committee. This standard is under the jurisdiction of the 704th Institute of the 7th Research Institute of China State Shipbuilding Corporation. This standard was drafted by the Oasis Machinery Factory of China State Shipbuilding Corporation and the 603rd Institute of China State Shipbuilding Corporation. The main drafters of this standard are Hao Jianer, Wu Rongmu and Zhou Yuhua.
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