Intermediate box transition section tool for marine crane test

Abstract

The utility model discloses an intermediate box transition section tool for a marine crane test, which comprises an upper flange and a lower flange, the upper flange and the lower flange are connected through a connecting plate to form a box type structure, and lifting lugs are arranged on the periphery of the connecting plate; the upper flange and the lower flange are both provided with fixing holes, the area of the upper flange is larger than that of the lower flange, the lower flange is connected to a hamburger through matching of connecting bolts and gaskets with the fixing holes, and the upper flange is connected to a crane bottom plate through matching of connecting bolts and gaskets with the fixing holes. The middle box transition section is improved and subjected to strength calculation on the original basis, reasonable lifting lugs are designed to facilitate lifting and increase the area of an upper flange face, multiple sets of holes can be punched in the upper portion at the same time to be used for ship cranes of different models, manpower and material resources are saved, the design cost is reduced, efficiency is improved, and the placing space is reduced; and the work is more time-saving and labor-saving.

Description

Technical Field

[0001] The utility model belongs to the technical field of ship machinery, relates to a marine crane, and particularly relates to a tooling for the intermediate box transition section in the test of a marine crane. Background Art

[0002] In recent years, with the development of the ship industry and the increasing demand of users for deck cranes, the research and development and innovation of products have become an important driving force for the development of enterprises. In order to ensure that the quality and performance of products meet the expectations, before the products are delivered to users for use, some functional tests need to be carried out in the manufacturing plant to test and verify the products. This can help enterprises understand the key indicators such as the performance, reliability, and safety of products, so as to optimize the product design and manufacturing process and improve the competitiveness of products.

[0003] Before leaving the factory, the marine crane needs to be taken to the outdoor test bench for some functional tests to verify the firmness of the connection of each component of the crane, check whether there is interference among the moving components, and whether the parameters such as the moving speed after the load test meet the design requirements, etc. Most of the lower part of the base column of the connection body between the lower part of the marine crane and the deck or the pedestal on the deck is welded. When moving the crane to the outdoor and connecting it to the test bench bunker, a upper and lower flange transition section is usually designed to replace the base column for functional tests.

[0004] The existing intermediate transition section is designed with reference to the base column and can only be used specifically, and cannot meet the outdoor tests of multiple models of cranes. Therefore, it is necessary to design multiple intermediate transition sections according to different models, and it takes a long time to design and manufacture an intermediate transition section, so the cost cannot be reduced and the efficiency cannot be improved. Content of the Utility Model

[0005] Aiming at the above problems, the main purpose of the utility model is to design a tooling for the intermediate box transition section in the test of a marine crane to solve the problem that the intermediate box transition section can only be used specifically during the test of the marine crane.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A tooling for the intermediate box transition section in the test of a marine crane includes an upper flange and a lower flange. The upper flange and the lower flange are connected by a connecting plate to form a box structure, and lifting lugs are arranged on the outer periphery of the connecting plate;

[0008] Both the upper flange and the lower flange are provided with fixing holes, and the area of the upper flange is larger than that of the lower flange.

[0009] As a further description of the utility model, the connecting plate is arranged in a cylindrical shape, and the fixing holes of the lower flange are arranged in a ring shape and are located outside the connecting plate.

[0010] As a further description of the present utility model, the fixing holes of the upper flange are annularly arranged and include several rings, located outside or inside the connecting plate.

[0011] As a further description of the present utility model, stiffening plates for reinforcement are also provided on the inner circumference of the connecting plate.

[0012] Compared with the prior art, the technical effects of the present utility model are as follows:

[0013] The present utility model provides a tooling for the intermediate box transition section in the marine crane test, including an upper flange and a lower flange. The upper flange and the lower flange are connected by a connecting plate to form a box structure. Lifting lugs are arranged on the outer circumference of the connecting plate. Fixing holes are opened on both the upper flange and the lower flange, and the area of the upper flange is larger than that of the lower flange. The lower flange is connected to the bunker through connecting bolts and gaskets in cooperation with the fixing holes, and the upper flange is connected to the crane bottom plate through connecting bolts and gaskets in cooperation with the fixing holes. During use, the intermediate box transition section has been improved and strength calculated on the original basis, and reasonable lifting lugs are designed for lifting. The area of the upper flange surface of the intermediate box transition section is increased, and multiple groups of holes can be drilled on the upper part for different types of marine cranes, saving manpower and material resources, reducing the design cost and improving the efficiency, reducing the placement space, and making the work more time-saving and labor-saving. Description of the Drawings

[0014] Figure 1 It is the overall structural view of the present utility model;

[0015] Figure 2 It is the overall structural sectional view of the present utility model;

[0016] Figure 3 It is the schematic diagram of the use scenario of the transition section tooling of the present utility model.

[0017] In the figure, 1. Upper flange, 2. Lower flange, 3. Connecting plate, 31. Stiffening plate, 4. Lifting lug, 5. Fixing hole, 6. Bunker, 7. Crane. Detailed Embodiment

[0018] The present utility model will be described in detail below with reference to the drawings:

[0019] In an embodiment of the present utility model, a tooling for the intermediate box transition section in the marine crane test is disclosed. Refer to Figures 1-3As shown in the figure, it includes an upper flange 1 and a lower flange 2. The upper flange 1 and the lower flange 2 are connected by a connecting plate 3 to form a box-shaped structure. A lifting lug 4 is arranged on the outer periphery of the connecting plate 3. Among them, fixing holes 5 are opened on both the upper flange 1 and the lower flange 2, and the area of the upper flange 1 is larger than that of the lower flange 2. The lower flange 2 is connected to the bunker 6 through connecting bolts and gaskets in cooperation with the fixing holes 5, and the upper flange 1 is connected to the bottom plate of the crane 7 through connecting bolts and gaskets in cooperation with the fixing holes 5.

[0020] Specifically, in this embodiment, the above-mentioned connecting plate 3 is arranged in a cylindrical shape. The fixing holes 5 of the lower flange 2 are arranged in a ring shape and are located outside the connecting plate 3. The fixing holes 5 of the upper flange 1 are arranged in a ring shape and include several rings. The diameter of each ring is different and is located outside or inside the connecting plate 3.

[0021] In addition, for the intermediate box transition section tooling of this embodiment, in order to meet actual requirements, sometimes in order to strengthen the strength, a reinforcing rib plate 31 for reinforcement is arranged on the inner periphery of the connecting plate 3. If the strength is sufficient, the rib plate 31 may not be designed.

[0022] In this embodiment, through strength and stress calculations, the area of the upper flange 1 is increased, and multiple groups of fixing holes 5 with different sizes can be opened on the upper part for outfield tests on different models of cranes, reducing the design cost and manufacturing cost. Specifically, the above-mentioned upper flange 1 is used to connect with the slewing ring gear for installing the crane bottom plate, transmitting the loads of the crane tower body, boom and load, etc. The connecting plate 3 is used to connect the upper flange 1 and the lower flange 2 to form a box-shaped structure. The lower flange 2 is connected to the test bench bunker 6 through connecting bolts and gaskets to transmit the applied load to the bunker 6. The lifting lug 4 is used for hoisting during the manufacture of the intermediate box transition section and when moving it into or out of the bunker 6.

[0023] As Figure 3 shown, through the design of the above-mentioned intermediate box transition section A, in a specific scenario, the usage method of the intermediate box transition section tooling is as follows:

[0024] S1: After the installation of the marine crane tower body and boom is completed, transport the tower body and boom to an appropriate position in the outfield bunker;

[0025] S2: Remove the protective cover on the bunker and place the protective cover in an appropriate position;

[0026] S3: Select a suitable intermediate box transition section and test connection bolts and gaskets according to the base column flange holes and the center line of the flange holes, or select a suitable intermediate box transition section to drill holes;

[0027] S4: Clean the upper flange surface of the bunker and the upper and lower flange surfaces of the intermediate box transition section;

[0028] S5: Lift the intermediate box transition section to the upper part of the bunker, and connect the intermediate box transition section to the bunker with connecting bolts and gaskets;

[0029] S6: Lift the tower body to the appropriate position above the intermediate box transition section, and after appropriate adjustment, connect the tower body and the intermediate box transition section with connecting bolts and gaskets;

[0030] S7: Connect the boom to the tower body and thread the corresponding wire ropes;

[0031] S8: Conduct the functional test of the marine crane according to the test requirements;

[0032] S9: Remove the wire ropes, boom, tower body, and intermediate box transition section after the test.

[0033] In the above disclosed embodiment, the intermediate box transition section simulates and serves the function of conducting the functional test of the marine crane on the steel structure of the shipyard foundation column. Since most of the lower parts of the foundation column designs are welded for welding connection with the ship's deck or pedestal, if the foundation column is welded to the bunker for testing according to the design and welding requirements, it will affect the flatness of the upper flange surface of the foundation column, etc., and subsequent processes such as grinding are required, greatly increasing the manufacturing cost. When the manufacturer designs the bunker, the upper connection of the bunker is directly changed to a flange surface, and the flatness of this flange surface is controlled within the corresponding tolerance range. At the same time, the foundation column is replaced by the intermediate box transition section (the strength of the intermediate box transition section will be checked to meet the strength requirements before the test), and the flatness of the upper and lower flange surfaces of the intermediate box transition section is also controlled within the corresponding tolerance range. In this way, it not only meets the function of simulating the test but also meets the staggered time requirement for the foundation column to be delivered to the shipyard in advance for welding with the ship's deck or pedestal.

[0034] The existing design of the intermediate box transition section refers to the supporting foundation column. Only one set of holes can be drilled on the upper flange of the intermediate box transition section, and it can only be used for the functional test of this supporting marine crane in the field.

[0035] Now the manufacturer produces a relatively large number of models of marine cranes. According to the models, many intermediate box transition sections need to be designed, which not only wastes the design cost and manufacturing cost but also wastes a large amount of storage resources. The intermediate box transition section of the present utility model has been improved and strength calculated on the original basis, and reasonable lifting lugs and their placement positions are designed for easy lifting. The area of the upper flange surface of the intermediate box transition section is increased, and multiple sets of holes can be drilled on the upper part simultaneously for different models of marine cranes, saving manpower and material resources, reducing the design cost and improving the efficiency, and reducing the placement space, etc., making the work more time-saving and labor-saving.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Any other modifications or equivalent substitutions made by those of ordinary skill in the art to the technical solutions of the present invention shall be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. A middle box transition section tooling for marine crane testing, characterized by: It includes an upper flange and a lower flange, wherein the upper flange and the lower flange are connected by a connecting plate to form a box-type structure, and a lifting lug is arranged on the periphery of the connecting plate; The upper flange and the lower flange are both provided with fixing holes, and the area of ​​the upper flange is larger than that of the lower flange; The connecting plate is configured to be cylindrical, and the fixing hole of the lower flange is opened in a ring shape and is located on the outer side of the connecting plate; The fixing hole of the upper flange is opened in a ring shape and includes a plurality of rings, which are located on the outer side or the inner side of the connecting plate.

2. The intermediate box transition section tooling for marine crane testing according to claim 1 is characterized by: The inner periphery of the connecting plate is also provided with a rib plate for reinforcement.

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