CN203998734U - The main string of derrick runway girder jib - Google Patents
The main string of derrick runway girder jib Download PDFInfo
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- CN203998734U CN203998734U CN201420429153.3U CN201420429153U CN203998734U CN 203998734 U CN203998734 U CN 203998734U CN 201420429153 U CN201420429153 U CN 201420429153U CN 203998734 U CN203998734 U CN 203998734U
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- jaw
- chord tube
- main chord
- forked standard
- main
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Abstract
The utility model discloses the main string of a kind of derrick runway girder jib, comprise main chord tube and joint, described joint comprises forked standard and the jaw of pairing, on forked standard and jaw, be respectively equipped with forked standard pin-and-hole and jaw pin-and-hole, and coordinate bearing pin to connect, forked standard and jaw are embedded in respectively in two main chord tube ports to be connected, and main chord tube and forked standard, jaw are welded to connect in main chord tube port.Without at main chord tube termination cutting elongated groove mouth, then main chord tube and forked standard, jaw are welded to connect, have avoided splitting the damage of long rabbet to main chord tube, improved the quality that is welded to connect of joint; The material of forked standard, jaw is identical with the material of main chord tube, is high strength steel BQ590E, makes joint and main chord tube reach equal strength, is convenient to welding; Use the main string of this joint and the main string of prior art to compare, volume is less, deadweight is lighter, cost, comprehensive mechanical performance are better.
Description
Technical field
The utility model relates to a kind of derrick runway girder jib, is specifically related to the main string of a kind of derrick runway girder jib.
Background technology
The main string of crane arm of tower crane, as shown in Figure 1, the joint being comprised of main chord tube 1 and forked standard 2, jaw 3 is formed by connecting, and on forked standard 2 and jaw 3, is respectively equipped with pin-and-hole, coordinates bearing pin to connect between forked standard 2 and jaw 3; Main chord tube 1 has long rabbet 4 for square tube and surrounding, as shown in Figure 2, forked standard 2 and jaw 3 insert respectively in two main chord tube 1 ports to be connected and carry out plug welding connection at long rabbet 4 places, and the material of main chord tube 1, forked standard 2 and jaw 3 generally all adopts dead-soft steel Q345B.
In order to reduce the deadweight of crane arm, and after crane arm being hung carry, the amount of deflection of distortion is moderate, crane arm main chord tube 1 is selected high strength steel BQ590E more and more in recent years, but joint forked standard 2 and jaw 3 still adopt dead-soft steel Q345B, connection mode between main chord tube 1 and joint is still for being cutting elongated groove mouth 4 on main chord tube 1, forked standard 2 and jaw 3 insert in main chord tube 1 port and carry out plug welding connection, and such joint sole mass is large, makes main string quality large; On main chord tube 1, the connection mode of cutting elongated groove mouth 4 has affected the intensity of main chord tube 1, affects the intensity of crane arm, brings potential safety hazard to the use of tower machine.
Utility model content
Technical problem to be solved in the utility model is to provide the main string of a kind of derrick runway girder jib, when solution main chord tube connects by joint, the impact of connection mode on main chord tube intensity, the joint quality of the main string of crane arm is alleviated, and comprehensive mechanical performance is better compared with prior art.
The technical scheme in the invention for solving the above technical problem is: the main string of a kind of derrick runway girder jib, comprise main chord tube and joint, described main chord tube is identical with joint material, described joint comprises forked standard and the jaw of pairing, on forked standard and jaw, be respectively equipped with forked standard pin-and-hole and jaw pin-and-hole, between forked standard and jaw, by bearing pin, connect, forked standard and jaw are embedded in respectively in two main chord tube ports to be connected, and main chord tube and forked standard, jaw are welded to connect in main chord tube port.
Further, described main chord tube is pipe.Main chord tube is selected pipe, is conducive to improve the bearing capacity of main string.
Further, the material of described forked standard, jaw is high strength steel BQ590E.The material of forked standard, jaw is known materials high strength steel BQ590E, and identical with the material of main chord tube.
Further, between described main chord tube and forked standard, jaw, butt welding is connected.
The beneficial effects of the utility model are: main chord tube is identical with the material of forked standard, jaw, forked standard and jaw are embedded in respectively in the port of main chord tube two ends, main chord tube and joint are welded to connect in port, main chord tube two ends, without at main chord tube termination cutting elongated groove mouth, again main chord tube is connected with forked standard, jaw plug welding, simplify production technology, avoided splitting the damage of long rabbet to main chord tube, improved the quality of connection of main chord tube and joint; Forked standard, jaw, with respect to prior art, have reduced the length stretching in main chord tube, and joint materials are more saved, and joint quality alleviates, cost; The material of forked standard, jaw is high strength steel BQ590E, makes joint and main chord tube reach equal strength, is convenient to welding; Use the main string of this joint and the main string of prior art to compare, volume is less, conduct oneself with dignity lighter, and cost, comprehensive mechanical performance is better.
Accompanying drawing explanation
Fig. 1 is the main string connection mode of the derrick runway girder jib schematic diagram of prior art;
Fig. 2 is the derrick runway girder jib main chord tube cutting elongated groove mouth position cross sectional representation of prior art;
Fig. 3 is the main string connection mode of the utility model derrick runway girder jib schematic diagram;
Fig. 4 is the schematic diagram of the jaw of the main string joint of the utility model derrick runway girder jib.
Parts title and numbering in figure:
Main chord tube 1, forked standard 2, jaw 3, long rabbet 4, jaw pin-and-hole 5, forked standard pin-and-hole 6, joint ring weld seam 7.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 3, the utility model " the main string of derrick runway girder jib " comprises main chord tube 1 and joint, described joint comprises forked standard 2 and jaw 3, on forked standard 2 and jaw 3, be respectively equipped with isodiametric forked standard pin-and-hole 6 and jaw pin-and-hole 5, between forked standard 2 and jaw 3, coordinate bearing pin to connect, forked standard 2 and jaw 3 are embedded in respectively in the port of two main chord tubes 1 to be connected, and main chord tube 1 and forked standard 2, jaw 3 are welded to connect in main chord tube 1 port, form joint ring weld seam 7.Main chord tube 1 is the pipe of high strength steel BQ590E material, and the material of forked standard 2, jaw 3 is all selected the high strength steel BQ590E identical with main chord matter, and the structure of jaw 3 as shown in Figure 4.
When the main string of assembling derrick runway girder jib, finished product jaw 3, forked standard 2 are assembled with main chord tube 1 in frock, control root of joint preset clearance, use welding wire welding, polishing cleaning welding bead after all welding.Use the main string of crane arm jib of the present utility model, volume and weight reduces greatly, meets the requirement of strength of main string completely, and the connection mode between main string is adapted at promoting the use of in the joint of various high strength steel structures.
Claims (4)
1. the main string of derrick runway girder jib, comprise main chord tube (1) and joint, it is characterized in that: the material of described main chord tube (1) and joint is identical, described joint comprises forked standard (2) and the jaw (3) of pairing, on forked standard (2) and jaw (3), be respectively equipped with forked standard pin-and-hole (6) and jaw pin-and-hole (5), between forked standard (2) and jaw (3), by bearing pin, connect, forked standard (2) and jaw (3) are embedded in respectively in two main chord tubes (1) port to be connected, main chord tube (1) and forked standard (2), jaw (3) is welded to connect in main chord tube (1) port.
2. the main string of derrick runway girder jib as claimed in claim 1, is characterized in that: described main chord tube (1) is pipe.
3. the main string of derrick runway girder jib as claimed in claim 1 or 2, is characterized in that: the material of described forked standard (2), jaw (3) is high strength steel BQ590E.
4. the main string of derrick runway girder jib as claimed in claim 3, is wherein characterised in that: between described main chord tube (1) and forked standard (2), jaw (3), butt welding is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420429153.3U CN203998734U (en) | 2014-07-31 | 2014-07-31 | The main string of derrick runway girder jib |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420429153.3U CN203998734U (en) | 2014-07-31 | 2014-07-31 | The main string of derrick runway girder jib |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203998734U true CN203998734U (en) | 2014-12-10 |
Family
ID=52038765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420429153.3U Active CN203998734U (en) | 2014-07-31 | 2014-07-31 | The main string of derrick runway girder jib |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203998734U (en) |
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2014
- 2014-07-31 CN CN201420429153.3U patent/CN203998734U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |