Side repair plate mounting device for large structural part lifting arm

Abstract

The utility model discloses a side repair plate installation device for a large-scale structural member lift arm, which comprises a fixing frame, a support frame and a positioning frame, the fixing frame comprises a fixing rod and a connecting rod, the connecting rod is vertically fixed on the fixing rod, the fixing rod is horizontally placed on the lift arm, and the positioning frame is arranged on the support frame. The lifting arm is fixedly connected to the side repairing plate, at least one connecting rod is arranged on the two sides of the lifting arm, the supporting frame is fixedly connected to the connecting rods, the positioning frame is fixedly connected with the connecting rods and the supporting frame, and the positioning frame positions the side repairing plate; according to the lifting arm repairing device, it is guaranteed that the side repairing plate is accurately placed on the lifting arm, and therefore the side repairing plate and the arc repairing plate can stably machine and repair the R-angle section, prone to cracking, of the lifting arm, and the service life of the repaired lifting arm is prolonged; and the conditions of resource waste caused by replacement of the lifting arm and short service life caused by only welding crack repair are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of large equipment repair, in particular to a side repair plate installation device for a lifting arm of a large structural member. Background Art

[0002] The lifting arm, a key component of the continuous casting machine's ladle turret, is a large structural part. It is installed on the center line of the casting machine and supported by a spherical joint bearing on the bracket. The lifting arm adopts a parallel four-bar linkage to ensure the translation and lifting of the ladle. Long-term load use will cause cracks to appear on the crossbeam of the lifting arm box, a large structural part. The cracks will continue to expand with the use time, making it impossible for the lifting arm to operate normally.

[0003] The existing repair method generally adopts on-site crack welding repair. Although the repair weld can be guaranteed to be defect-free when the crack is repaired by welding, the post-weld heat treatment can reduce stress concentration, and the drawing size and precision size can be restored by online manual grinding, and it can be delivered to production in time, but for cracks at the R corner of the lifting arm of a large structural part, after welding repair, various mechanical properties cannot meet the long-term use requirements of the lifting arm translation and lifting due to the influence of welding repair. In order to meet long-term use, it is generally necessary to replace the lifting arm, but the lifting arm is large in size, and there are certain difficulties in disassembly, hoisting and transportation. In addition, the replacement of local components is not suitable for the assembly of new and old equipment, which is also easy to waste a lot of procurement costs.

[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 side repair plate installation device for a lifting arm of a large structural member, the lifting arm is provided with a first fitting surface and a second fitting surface, the first fitting surface and the second fitting surface are transitioned through the arc of the R angle segment to be repaired, the side repair plates are arranged on both sides of the arc repair plate and are fitted and connected with the vertical side surface of the lifting arm and cover the side surface of the R angle segment;

[0006] The side repair plate installation device for the lifting arm of a large structural member includes a fixing frame, a supporting frame and a positioning frame, the fixing frame includes a fixing rod and a connecting rod, the connecting rod is vertically fixed to the fixing rod, the fixing rod is horizontally placed on the lifting arm, and at least one connecting rod is arranged on both sides of the lifting arm, the supporting frame is fixedly connected to the connecting rod, the positioning frame is fixedly connected to the connecting rod and the supporting frame, and the positioning frame positions the side repair plate.

[0007] Preferably, the support frame includes a support rod and a reinforcing rod, the support rod is vertically fixed on the connecting rod, the reinforcing rod is arranged below the support rod and two ends of the reinforcing rod are respectively connected to the support rod and the connecting rod.

[0008] Preferably, the positioning frame includes a bottom positioning plate, which is horizontally arranged on the support rod and is arranged corresponding to the bottom of the side repair plate, for supporting and positioning the lower edge of the side repair plate.

[0009] Preferably, the positioning frame also includes a first side positioning plate and a second side positioning plate, the first side positioning plate and the second side positioning plate are respectively arranged on both sides of the side repair plate, the first side positioning plate is fixedly arranged on the connecting rod, the second side positioning plate is fixedly arranged on the bottom positioning plate, and the first side positioning plate, the second side positioning plate and the bottom positioning plate are all vertically arranged, and the first side positioning plate and the second side positioning plate respectively perform positioning operations on both sides of the side repair plate.

[0010] Preferably, the first side positioning plate and the second side positioning plate are arranged in parallel.

[0011] Preferably, the positioning frame also includes a top pressure positioning plate, which is vertically fixed to the bottom positioning plate, and the top pressure positioning plate is vertically arranged with the fixing rod. An adjustment gap is arranged between the top pressure positioning plate and the lifting arm, and the side repair plate is arranged between the top pressure positioning plate and the lifting arm. A first adjustment hole is arranged on the top pressure positioning plate, and the first adjustment hole is arranged as a threaded hole. A first mounting push rod is threadedly connected to the first adjustment hole, and the first mounting push rod is vertically arranged with the top pressure positioning plate. By rotating the first mounting push rod, one end of the first mounting push rod can be pressed against the side repair plate.

[0012] Preferably, at least two first adjustment holes are provided on the same pressing and positioning plate, and the first mounting push rods in the two first adjustment holes are arranged in parallel.

[0013] Preferably, a second adjustment hole is provided on the second side positioning plate, and the second adjustment hole is configured as a threaded hole. A second mounting push rod is threadedly connected to the second adjustment hole, and the second mounting push rod is vertically arranged to the second side positioning plate. By rotating the second mounting push rod, one end of the second mounting push rod can be pressed against the side edge of the side repair plate.

[0014] Compared with the prior art, the beneficial effect of the present invention is that the present invention ensures that the side repair plate is accurately placed on the lifting arm, so that the side repair plate and the arc repair plate can stably process and repair the R-angle section of the lifting arm that is prone to cracks, thereby increasing the service life of the lifting arm after repair and avoiding the waste of resources caused by replacement of the lifting arm and the low service life caused by only welding crack repairs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional structural view of the side repair plate installation device for the large structural member lifting arm during installation;

[0016] Figure 2 A structural front view of the side repair plate installation device for the large structural member lifting arm during installation;

[0017] Figure 3 A three-dimensional structural view of the side repair plate installation device for the lifting arm of a large structural member when positioning the side repair plate;

[0018] Figure 4 The figure is a structural view of the side repair plate installation device for the large structural member lifting arm.

[0019] The numbers in the figure represent:

[0020] 1-lifting arm; 2-arc repair plate; 3-side repair plate; 4-fixing frame; 5-support frame; 6-positioning frame; 11-first fitting surface; 12-second fitting surface; 13-R angle segment; 41-fixing rod; 42-connecting rod; 51-support rod; 52-reinforcement rod; 61-bottom positioning plate; 62-first side positioning plate; 63-second side positioning plate; 64-top pressure positioning plate; 65-first mounting top rod; 66-second mounting top rod. DETAILED DESCRIPTION

[0021] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0022] Embodiment 1

[0023] The utility model achieves structural strengthening by welding an arc repair plate 2 and a side repair plate 3 at corresponding positions of the lifting arm 1, and wrapping and repairing the R-angle section 13 of the lifting arm 1 that is prone to cracks through the arc repair plate 2 and the side repair plate 3, thereby improving the service life of the lifting arm 1 after repair, and avoiding the situation where the lifting arm 1 is replaced with a new one or the service life is low due to only welding crack repair. The lifting arm 1 is provided with a first fitting surface 11 and a second fitting surface 12, and the first fitting surface 11 and the second fitting surface 12 are transitioned through the arc of the R-angle section 13, and the arc repair plate 2 is fitted and connected to the first fitting surface 11 and the second fitting surface 12 and covers the R-angle section 13, and the side repair plate 3 is provided on both sides of the arc repair plate 2 and fits and connects to the vertical side surface of the lifting arm 1 and covers the side surface of the R-angle section 13, thereby achieving wrapping and repairing the R-angle section 13.

[0024] like Figures 1 to 4 As shown, Figure 1 A three-dimensional structural view of the side repair plate installation device for the large structural member lifting arm during installation; Figure 2 A structural front view of the side repair plate installation device for the large structural member lifting arm during installation; Figure 3 A three-dimensional structural view of the side repair plate installation device for the lifting arm of a large structural member when positioning the side repair plate; Figure 4 The figure is a structural view of the side repair plate installation device for the large structural member lifting arm.

[0025] The side repair plate installation device for the lifting arm of a large structural member described in the utility model includes a fixing frame 4, a supporting frame 5 and a positioning frame 6, the fixing frame 4 includes a fixing rod 41 and a connecting rod 42, the connecting rod 42 is vertically fixed to the fixing rod 41, the fixing rod 41 is horizontally placed on the lifting arm 1, and at least one connecting rod 42 is arranged on both sides of the lifting arm 1, the supporting frame 5 is fixedly connected to the connecting rod 42, the positioning frame 6 is fixedly connected to the connecting rod 42 and the supporting frame 5, and the positioning frame 6 positions the side repair plate 3 so that the side repair plate 3 is accurately placed corresponding to the side of the R angle section 13.

[0026] A side repair plate 3 is provided on both sides of the lifting arm 1, and a positioning frame 6 is provided on both sides of the corresponding lifting arm 1. The positioning frame 6 is arranged in a one-to-one correspondence with the side repair plate 3, and the positioning frame 6 is used to perform precise positioning operations on the corresponding side repair plate 3 before welding.

[0027] Specifically, the support frame 5 includes a support rod 51 and a reinforcing rod 52. The support rod 51 is vertically fixed on the connecting rod 42. The reinforcing rod 52 is arranged below the support rod 51 and the two ends of the reinforcing rod 52 are respectively connected to the support rod 51 and the connecting rod 42, thereby stably supporting the positioning frame 6.

[0028] The positioning frame 6 includes a bottom positioning plate 61, a first side positioning plate 62, a second side positioning plate 63 and a top pressure positioning plate 64. The bottom positioning plate 61 is horizontally arranged on the support rod 51, and the bottom positioning plate 61 is arranged corresponding to the bottom of the side repair plate 3, and is used to support and position the lower edge of the side repair plate 3.

[0029] The first side positioning plate 62 and the second side positioning plate 63 are respectively arranged on both sides of the side repair plate 3, the first side positioning plate 62 is fixedly arranged on the connecting rod 42, the second side positioning plate 63 is fixedly arranged on the bottom positioning plate 61, and the first side positioning plate 62, the second side positioning plate 63 and the bottom positioning plate 61 are all vertically arranged, and the first side positioning plate 62 and the second side positioning plate 63 respectively perform positioning operations on both sides of the side repair plate 3.

[0030] Preferably, the first side positioning plate 62 and the second side positioning plate 63 are arranged in parallel, thereby ensuring that both sides of the side repair plate 3 are vertically fitted with the first side positioning plate 62 or the second side positioning plate 63, so as to improve the positioning effect of the first side positioning plate 62 and the second side positioning plate 63 on the side of the side repair plate 3.

[0031] The top pressure positioning plate 64 is vertically fixed on the bottom positioning plate 61, and the top pressure positioning plate 64 is vertically arranged with the fixing rod 41. An adjustment gap is arranged between the top pressure positioning plate 64 and the lifting arm 1, and the side repair plate 3 is arranged between the top pressure positioning plate 64 and the lifting arm 1. A first adjustment hole is arranged on the top pressure positioning plate 64, and the first adjustment hole is arranged as a threaded hole. A first mounting push rod 65 is threadedly connected to the first adjustment hole. The first mounting push rod 65 is vertically arranged with the top pressure positioning plate 64. By rotating the first mounting push rod 65, one end of the first mounting push rod 65 can be pressed against the side repair plate 3 to fit the side repair plate 3 tightly with the lifting arm 1.

[0032] Preferably, at least two first adjustment holes are provided on the same pressing and positioning plate 64 , and the first mounting push rods 65 in the two first adjustment holes are arranged in parallel, so as to achieve stable pressing and positioning of the side repair plate 3 .

[0033] A second adjustment hole is provided on the second side positioning plate 63, and the second adjustment hole is set as a threaded hole. The second adjustment hole is threadedly connected with a second mounting push rod 66. The second mounting push rod 66 is vertically arranged to the second side positioning plate 63. By rotating the second mounting push rod 66, one end of the second mounting push rod 66 can be pressed against the side edge of the side repair plate 3, so that the first side positioning plate 62 is used as a reference surface for side positioning. The pressing operation of the second mounting push rod 66 realizes the close fit between the side repair plate 3 and the first side positioning plate 62, thereby ensuring the accurate position of the side repair plate 3.

[0034] Through the pressing structure setting of the second side positioning plate 63, a larger gap is set between the first side positioning plate 62 and the second side positioning plate 63, so that the side repair plate 3 is convenient to be placed between the first side positioning plate 62 and the second side positioning plate 63.

[0035] Preferably, the bottom positioning plate 61 , the first side positioning plate 62 , and the second side positioning plate 63 are arranged in contact with and in close contact with the lifting arm 1 , thereby ensuring that the installation position of the utility model on the lifting arm 1 is stable.

[0036] It is worth pointing out that an installation gap is provided between the bottom positioning plate 61, the first side positioning plate 62, the second side positioning plate 63 and the lifting arm 1, and the installation gap is smaller than the thickness of the side repair plate 3, thereby facilitating the installation of the utility model on the lifting arm 1 while also ensuring the precise positioning effect of each positioning plate on the side repair plate 3.

[0037] The utility model ensures that the side repair plate 3 is accurately placed on the lifting arm 1, so that the side repair plate 3 and the arc repair plate 2 can stably process and repair the R-angle section 13 of the lifting arm 1 that is prone to cracks, so as to increase the service life of the lifting arm 1 after repair, avoid the waste of resources caused by the replacement of the lifting arm 1 and the low service life caused by only welding crack repairs.

[0038] Embodiment 2

[0039] The specific steps of using the utility model to repair the lifting arm of a large structural member include: firstly, placing the arc repair plate 2 horizontally on the upper surface of the box crossbeam of the lifting arm 1, and then horizontally setting the fixing rod 41 on the upper surface of the arc repair plate 2. After determining the position, the connecting rod 42 is welded and fixed to the vertical side plate of the lifting arm 1, and the side repair plate 3 is placed on the bottom positioning plate 61 accordingly. The side repair plate 3 is simultaneously set between the first side positioning plate 62 and the second side positioning plate 63, and between the top pressure positioning plate 64 and the lifting arm 1. By adjusting The first mounting push rod 65 and the second mounting push rod 66 adjust the position accuracy of the side repair plate 3 and finally lock the position. The side repair plate 3, the vertical side plate of the lifting arm 1 and the arc repair plate 2 are assembled and fixedly welded. After the fixed welding is completed, all the fillet welds pass the UT and MT inspections. If there are no defects in the welds, the fixing frame 4, the supporting frame 5 and the positioning frame 6 are removed. The side repair plate 3 passes the on-site actual sample inspection and acceptance and fully meets the design and installation requirements. It is delivered for use and has undergone periodic continuous casting machine large bag turntable operation inspections to achieve the mechanical performance use effect.

[0040] The utility model can be used to repair the lifting arm of a large structural member, which is not only safe and easy to operate, but also has stable welding quality and low investment cost, meets the actual needs of the site, has high work efficiency, and greatly reduces maintenance costs and reduces losses caused by long-term downtime, thus providing a guarantee for reasonable production.

[0041] 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 side repair plate installation device for a large structural lifting arm, characterized in that: The lifting arm is provided with a first fitting surface and a second fitting surface, wherein the first fitting surface and the second fitting surface are transitioned through the arc of the R-angle segment to be repaired, and the side repair plates are provided on both sides of the arc repair plate and are fitted and connected with the vertical side surface of the lifting arm and cover the side surface of the R-angle segment; The side repair plate installation device for the lifting arm of a large structural member includes a fixing frame, a supporting frame and a positioning frame, the fixing frame includes a fixing rod and a connecting rod, the connecting rod is vertically fixed to the fixing rod, the fixing rod is horizontally placed on the lifting arm, and at least one connecting rod is arranged on both sides of the lifting arm, the supporting frame is fixedly connected to the connecting rod, the positioning frame is fixedly connected to the connecting rod and the supporting frame, and the positioning frame positions the side repair plate.

2. The side repair plate installation device for a large structural member lifting arm according to claim 1, characterized in that: The support frame includes a support rod and a reinforcing rod, wherein the support rod is vertically fixed on the connecting rod, and the reinforcing rod is arranged below the support rod and two ends of the reinforcing rod are respectively connected to the support rod and the connecting rod.

3. The side repair plate installation device for a large structural member lifting arm according to claim 2, characterized in that: The positioning frame includes a bottom positioning plate, which is horizontally arranged on the support rod and is arranged corresponding to the bottom of the side repair plate, and is used to support and position the lower edge of the side repair plate.

4. The side repair plate installation device for a large structural member lifting arm as claimed in claim 3, characterized in that: The positioning frame also includes a first side positioning plate and a second side positioning plate, the first side positioning plate and the second side positioning plate are respectively arranged on both sides of the side repair plate, the first side positioning plate is fixedly arranged on the connecting rod, the second side positioning plate is fixedly arranged on the bottom positioning plate, and the first side positioning plate, the second side positioning plate and the bottom positioning plate are all vertically arranged, and the first side positioning plate and the second side positioning plate respectively perform positioning operations on both sides of the side repair plate.

5. The side repair plate installation device for a large structural member lifting arm according to claim 4, characterized in that: The first side positioning plate and the second side positioning plate are arranged in parallel.

6. The side repair plate installation device for a large structural member lifting arm according to claim 4, characterized in that: The positioning frame also includes a top pressure positioning plate, which is vertically fixed to the bottom positioning plate, and the top pressure positioning plate is vertically arranged with the fixing rod. An adjustment gap is arranged between the top pressure positioning plate and the lifting arm, and the side repair plate is arranged between the top pressure positioning plate and the lifting arm. A first adjustment hole is arranged on the top pressure positioning plate, and the first adjustment hole is arranged as a threaded hole. A first mounting push rod is connected with the inner thread of the first adjustment hole. The first mounting push rod is vertically arranged with the top pressure positioning plate, and one end of the first mounting push rod can be pressed against the side repair plate by rotating the first mounting push rod.

7. The side repair plate installation device for a large structural member lifting arm according to claim 6, characterized in that: At least two first adjustment holes are arranged on the same pressing and positioning plate, and the first mounting push rods in the two first adjustment holes are arranged in parallel.

8. The side repair plate installation device for a large structural member lifting arm according to claim 4, characterized in that: A second adjustment hole is provided on the second side positioning plate, and the second adjustment hole is set as a threaded hole. A second mounting push rod is threadedly connected to the second adjustment hole. The second mounting push rod is vertically arranged to the second side positioning plate. By rotating the second mounting push rod, one end of the second mounting push rod can be pressed against the side edge of the side repair plate.

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