Welding and heating device for cracking of R corner of buggy ladle frame with large structural member

Abstract

The utility model discloses a large structural part buggy ladle frame R corner cracking welding heating device which comprises a supporting frame and a heating pipeline, the heating pipeline comprises two first connecting pipes and a plurality of second connecting pipes, the two ends of each second connecting pipe are communicated with the two first connecting pipes respectively, and each first connecting pipe comprises a first connecting section and a second connecting section which are communicated. The first connecting section is parallel to the first structural surface, the second connecting section is parallel to the second structural surface, heating nozzles are arranged on the first connecting pipe and the second connecting pipe in the direction corresponding to a buggy ladle frame, a flow control valve is arranged on the heating pipeline, and the flow control valve is connected with an external conveying pipeline; according to the utility model, the heating pipeline is supported and positioned by the support frame, so that the heating pipeline forms a planar frame structure matched with the to-be-heated surface of the buggy ladle frame, and the temperature control on the periphery of the R-angle section is realized through uniform heating of the heating nozzles on the heating pipeline, so that local preheating before welding and heat treatment after welding are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of large equipment repair, in particular to a large structural part ladle car frame R corner crack welding heating device. Background Art

[0002] The ladle car device for large structural parts is often used in converter and large structural parts refining projects. The ladle car will cause cracks on the R corner due to long-term load use, and the cracks will continue to expand with the use time, making it impossible for the ladle car to operate normally.

[0003] The existing repair method generally adopts on-site crack welding repair. The ladle car of the large structural part refining project is made of 16Mn. Although 16Mn low-alloy steel has good weldability, in order to control stress and deformation on large thickness and high rigidity structures, local pre-welding preheating and post-welding heat treatment must be performed. Since the R angle of the ladle car of the large structural part refining project is large and irregular, the existing heating device cannot meet the actual on-site working conditions for local pre-welding preheating and post-welding heat treatment temperature control, which easily leads to poor welding repair effect.

[0004] In view of the above-mentioned defects, the inventor of the present invention finally obtained the present invention after a long period of research and practice. Utility Model Content

[0005] In order to solve the above technical defects, the technical solution adopted by the utility model is to provide a large structural member ladle car frame R corner crack welding heating device, the ladle car frame includes a first structural surface and a second structural surface, the first structural surface and the second structural surface are transitioned through the R corner segment to be repaired;

[0006] The R-angle crack welding heating device for a large structural member ladle car frame includes a support frame and a heating pipe, the heating pipe includes two first connecting pipes and a plurality of second connecting pipes, the two ends of the second connecting pipes are respectively connected to the two first connecting pipes to form a planar frame structure, the first connecting pipe includes a first connecting section and a second connecting section that are connected, the first connecting section is arranged parallel to the first structural surface, the second connecting section is arranged parallel to the second structural surface, the first connecting pipe and the second connecting pipe are provided with heating nozzles corresponding to the direction of the ladle car frame, the heating pipe is provided with a flow control valve, and the flow control valve is connected to an external delivery pipe.

[0007] Preferably, each of the second connecting tubes is arranged in parallel, and each of the second connecting tubes is evenly distributed in a straight line along the extension direction of the first connecting tube, the heating nozzles on each of the second connecting tubes are evenly distributed in a straight line along the extension direction of the second connecting tubes, and the heating nozzles on each of the first connecting tubes are evenly distributed in a linear line along the extension direction of the first connecting tubes.

[0008] Preferably, the flow control valve is arranged on the second connecting pipe located at the lowest position.

[0009] Preferably, the first connecting pipe is fixedly connected to the supporting frame.

[0010] Preferably, the support frame includes a support rod and a connecting rod, the support rod is vertically arranged, the connecting rod is horizontally arranged, the support rod and the connecting rod are vertically fixedly connected, the bottom of the support rod is arranged in contact with the support surface, and the connecting rod is connected to the first connecting tube.

[0011] Preferably, the connecting rod includes a first connecting member and a second connecting member, the first connecting member is horizontally arranged at the top of the support rod, the second connecting member is arranged below the first connecting rod, the first connecting member and the second connecting member are arranged parallel to each other, the first connecting member is fixedly connected to the first connecting section, and the end of the second connecting member is fixedly connected to the second connecting section.

[0012] Preferably, the first connecting member and the first connecting section are arranged in parallel.

[0013] Preferably, a plurality of the second connecting members are provided, and the second connecting rods connected to the same second connecting section are arranged at different heights.

[0014] Preferably, the first connecting pipe and the second connecting pipe are both made of φ50mm seamless steel pipes, the first connecting pipe is formed by bending the seamless steel pipe, and the heating pipe is formed by welding the first connecting pipe and the second connecting pipe.

[0015] Preferably, the support rods and the connecting rods are both made of φ80mm seamless steel pipes, and the support frame is formed by welding the support rods and the connecting rods.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the utility model supports and positions the heating pipe through the support frame, so that the heating pipe forms a planar frame structure that is compatible with the surface to be heated of the ladle car frame, and the temperature around the R corner section is controlled uniformly by the heating nozzle on the heating pipe, so as to realize local preheating before welding and post-weld heat treatment operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the R-angle crack welding heating device for a large structural member ladle car frame when in use;

[0018] Figure 2 It is a structural front view of the R-angle crack welding heating device for the large structural part ladle car frame when in use;

[0019] Figure 3 It is a three-dimensional structural view of the R corner crack welding heating device of the large structural part ladle car frame;

[0020] Figure 4 It is a structural front view of the R corner crack welding heating device of the large structural component ladle car frame.

[0021] The numbers in the figure represent:

[0022] 1- ladle car frame; 2- support frame; 3- heating pipe; 4- heating nozzle; 5- flow control valve; 11- first structural surface; 12- second structural surface; 13- R angle section; 21- support rod; 22- connecting rod; 31- first connecting pipe; 32- second connecting pipe; 221- first connecting piece; 222- second connecting piece; 311- first connecting section; 312- second connecting section. DETAILED DESCRIPTION

[0023] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0024] Embodiment 1

[0025] The R-angle crack welding heating device for a large structural member ladle car frame of the utility model is used for a ladle car frame 1, wherein the ladle car frame 1 comprises a first structural surface 11 and a second structural surface 12, wherein the first structural surface 11 and the second structural surface 12 are transitioned by an R-angle segment 13, and the R-angle segment 13 is a crack-prone segment of the ladle car frame 1. When performing welding crack repair, the ladle car frame 1 is generally placed horizontally, wherein the first structural surface 11 is horizontally arranged, and the second structural surface 12 is tilted downwardly in a direction away from the first structural surface 11.

[0026] like Figures 1 to 4 As shown, Figure 1 It is a three-dimensional schematic diagram of the R-angle crack welding heating device for a large structural member ladle car frame when in use; Figure 2 It is a structural front view of the R-angle crack welding heating device for the large structural part ladle car frame when in use; Figure 3 It is a three-dimensional structural view of the R corner crack welding heating device of the large structural part ladle car frame; Figure 4 It is a structural front view of the R corner crack welding heating device of the large structural component ladle car frame.

[0027] The R-angle crack welding heating device for a large structural member ladle car frame of the utility model comprises a support frame 2 and a heating pipe 3, wherein the heating pipe 3 comprises two first connecting pipes 31 and a plurality of second connecting pipes 32, wherein the two ends of the second connecting pipes 32 are respectively connected to the two first connecting pipes 31 to form a planar frame structure, so as to uniformly heat the first structural surface 11 and the second structural surface 12, wherein the first connecting pipe 31 comprises a first connecting section 311 and a second connecting section 312, wherein the first connecting section 311 is arranged parallel to the first structural surface 11, and the second connecting section 312 is arranged parallel to the second structural surface 12, and the first connecting section 311 and the second connecting section 312 have an arc transition, and the first connecting pipe 31 and the second connecting pipe 32 are provided with heating nozzles 4 corresponding to the ladle car frame 1, and the heating pipe 3 is provided with a flow control valve 5, and the flow control valve 5 is connected to an external delivery pipeline. The combustible gas is transported into the heating pipe 3 through the external transport channel and the corresponding area is heated through the heating nozzle 4, so that the local pre-welding preheating and post-welding heat treatment operations of the ladle car frame 1 can be achieved.

[0028] The flow control valve 5 is used to adjust the gas flow rate entering the heating pipe 3 and switch it on and off, so that the local area of ​​the ladle car frame 1 can be heated or kept warm based on actual conditions.

[0029] Preferably, each of the second connecting tubes 32 is arranged in parallel, and each of the second connecting tubes 32 is linearly evenly distributed along the extension direction of the first connecting tube 31, the heating nozzles 4 on each of the second connecting tubes 32 are linearly evenly distributed along the extension direction of each of the second connecting tubes 32, and the heating nozzles 4 on each of the first connecting tubes 31 are linearly evenly distributed along the extension direction of each of the first connecting tubes 31, thereby ensuring balanced heating at each position of the heating pipe 3.

[0030] Generally, the flow control valve 5 is disposed on the second connecting pipe 32 at the lowest position, so as to facilitate the operator to perform flow control operation.

[0031] Preferably, the first connecting tube 31 is fixedly connected to the support frame 2 to achieve overall support and fixing operation for the heating pipe 3. Only by connecting the first connecting tube 31 and the support frame 2, the overall shape structure of the heating pipe 3 can be stabilized while reducing the welding area of ​​the heating pipe 3 and the support frame 2, thereby reducing the deformation of the heating pipe 3 caused by welding with the support frame 2, ensuring that the shape of the heating pipe 3 and the area to be heated on the ladle car frame 1 are more closely matched, thereby avoiding local overheating and the like.

[0032] Specifically, the support frame 2 includes a support rod 21 and a connecting rod 22, the support rod 21 is vertically arranged, and the connecting rod 22 is horizontally arranged. The support rod 21 and the connecting rod 22 are vertically fixedly connected, and the bottom of the support rod 21 is arranged in contact with the supporting surface, so as to achieve the supporting and fixing effect of the support rod 21 on the connecting rod 22, and the connecting rod 22 is connected to the first connecting tube 31.

[0033] The connecting rod 22 includes a first connecting member 221 and a second connecting member 222. The first connecting member 221 is horizontally arranged at the top of the support rod 21, and the second connecting member 222 is arranged below the first connecting rod 22. The first connecting member 221 and the second connecting member 222 are arranged in parallel. The first connecting member 221 is fixedly connected to the first connecting section 311, and the end of the second connecting member 222 is fixedly connected to the second connecting section 312, thereby realizing the supporting and fixing effect of the support frame 2 on the overall structure of the heating pipe 3.

[0034] Generally, the first connecting member 221 and the first connecting section 311 are arranged in parallel, so as to facilitate welding and fixing of the first connecting member 221 and the first connecting section 311 .

[0035] A plurality of second connecting members 222 are provided, and the second connecting rods 22 connected to the same second connecting section 312 are arranged at different heights, thereby ensuring stable support for the inclined second connecting section 312 .

[0036] Specifically, the first connecting pipe 31 and the second connecting pipe 32 are both made of φ50 mm seamless steel pipes. The first connecting pipe 31 is formed by bending the seamless steel pipe, and the heating pipe 3 is formed by welding the first connecting pipe 31 and the second connecting pipe 32 .

[0037] The support rod 21 and the connecting rod 22 are both made of φ80mm seamless steel pipes. The support frame 2 is formed by welding the support rod 21 and the connecting rod 22. By moving and adjusting the support frame 2, it can be ensured that each heating nozzle 4 is located at a better heating position.

[0038] The utility model supports and positions the heating pipe 3 by the support frame 2, so that the heating pipe 3 forms a planar frame structure adapted to the surface to be heated of the ladle car frame 1, and uniformly heats the heating nozzle 4 on the heating pipe 3, thereby achieving temperature control around the R-angle segment 13, so as to realize local preheating before welding and heat treatment after welding.

[0039] Embodiment 2

[0040] The heating process of the R corner segment by using the utility model is as follows: first, the ladle car frame 1 is fixed horizontally, the heating nozzle 4 is evenly welded and fixed on the heating pipe 3, the side of the heating pipe 3 provided with the heating nozzle 4 is directed toward the first structural surface 11 and the second structural surface 12, and a reasonable heating distance is provided between the heating nozzle 4 and the first structural surface 11 and the second structural surface 12, so as to facilitate uniform heating of the main body. Then, according to the welding repair site of the ladle car frame 1, the support frame 2 is fixedly installed, the first connecting piece 221 is fixedly connected to the first connecting section 311, and the end of the second connecting piece 222 is fixedly connected to the second connecting section 312 to form the overall large-scale structural component ladle car frame R-angle crack welding heating device, which can be adjusted to move to a suitable heating position, and finally the gas flow control valve 5 is arranged on the heating pipe 3 to ensure that the heating gas flow rate can be controlled before and during the welding repair of the ladle car frame R-angle crack and welding heat treatment. The refining engineering ladle car after welding and repair by the large-scale structural component ladle car frame R-angle crack welding heating device of the utility model has passed the on-site actual sample inspection and acceptance and fully meets the design and installation requirements, and is put into use. After the periodic refining engineering ladle car operation inspection, the mechanical performance use effect is achieved.

[0041] The utility model is adopted to perform preheating before welding or heat treatment after welding of the R angle segment, which is not only safe and easy to operate, but also can stably improve the welding quality, has low investment cost, meets the actual needs of the site, has high work efficiency, greatly reduces the maintenance cost, and reduces the loss of long-term downtime, thus providing a guarantee for reasonable production.

[0042] The above is only a preferred embodiment of the utility model, which is only illustrative and not restrictive. Those skilled in the art understand that many changes, modifications, and even equivalences can be made within the spirit and scope defined by the claims of the utility model, but they will all fall within the scope of protection of the utility model.

Claims

1. A large structural part ladle car frame R corner crack welding heating device, characterized in that: The ladle car frame comprises a first structural surface and a second structural surface, wherein the first structural surface and the second structural surface are transitioned through an R-angle segment arc to be repaired; The R-angle crack welding heating device for a large structural member ladle car frame includes a support frame and a heating pipe, the heating pipe includes two first connecting pipes and a plurality of second connecting pipes, the two ends of the second connecting pipes are respectively connected to the two first connecting pipes to form a planar frame structure, the first connecting pipe includes a first connecting section and a second connecting section that are connected, the first connecting section is arranged parallel to the first structural surface, the second connecting section is arranged parallel to the second structural surface, the first connecting pipe and the second connecting pipe are provided with heating nozzles corresponding to the direction of the ladle car frame, the heating pipe is provided with a flow control valve, and the flow control valve is connected to an external delivery pipe.

2. The large structural member ladle car frame R corner crack welding heating device as claimed in claim 1 is characterized in that: The second connecting tubes are arranged in parallel, and the second connecting tubes are evenly distributed in a straight line along the extension direction of the first connecting tubes, the heating nozzles on the second connecting tubes are evenly distributed in a straight line along the extension direction of the second connecting tubes, and the heating nozzles on the first connecting tubes are evenly distributed in a linear line along the extension direction of the first connecting tubes.

3. The large structural member ladle car frame R corner crack welding heating device as claimed in claim 2 is characterized in that: The flow control valve is disposed on the second connecting pipe located at the lowest position.

4. The large structural member ladle car frame R corner crack welding heating device as claimed in claim 2, characterized in that: The first connecting pipe is fixedly connected to the supporting frame.

5. The R-angle crack welding and heating device for large structural parts of ladle car frame as claimed in claim 4 is characterized in that: The support frame includes a support rod and a connecting rod, the support rod is vertically arranged, the connecting rod is horizontally arranged, the support rod and the connecting rod are vertically fixedly connected, the bottom of the support rod is arranged in contact with the support surface, and the connecting rod is connected to the first connecting pipe.

6. The large structural member ladle car frame R corner crack welding heating device as claimed in claim 5, characterized in that: The connecting rod includes a first connecting member and a second connecting member, the first connecting member is horizontally arranged at the top of the supporting rod, the second connecting member is arranged below the first connecting member, the first connecting member and the second connecting member are arranged parallel to each other, the first connecting member is fixedly connected to the first connecting section, and the end of the second connecting member is fixedly connected to the second connecting section.

7. The large structural member ladle car frame R corner crack welding heating device as claimed in claim 6, characterized in that: The first connecting member and the first connecting section are arranged in parallel.

8. The R-angle crack welding and heating device for large structural parts of ladle car frame as claimed in claim 6 is characterized in that: A plurality of the second connecting members are provided, and the second connecting members connected to the same second connecting section are arranged at different heights.

9. The large structural member ladle car frame R corner crack welding heating device as claimed in claim 1, characterized in that: The first connecting pipe and the second connecting pipe are both made of φ50mm seamless steel pipes. The first connecting pipe is formed by bending the seamless steel pipe, and the heating pipe is formed by welding the first connecting pipe and the second connecting pipe.

10. The large structural member ladle car frame R corner crack welding heating device as claimed in claim 5, characterized in that: The support rods and the connecting rods are both made of φ80mm seamless steel pipes, and the support frame is formed by welding the support rods and the connecting rods.

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