Pit furnace lifting appliance for heat treatment of long shaft part

Abstract

The utility model discloses a pit furnace sling for heat treatment of long shaft, which comprises a hoisting component, a connecting component and a pendant component which are fixedly connected in sequence from top to bottom, the pendant component comprises a central connecting part and a plurality of hanging parts, and comprises a hollow connecting column and a first rib plate, the hollow connecting column is fixedly connected with the connecting component, and the first rib plate is fixedly connected with the central connecting part. A plurality of first rib plates are evenly and fixedly connected to the outer wall of the hollow connecting column in the circumferential direction and extend towards the outer portion of the hollow connecting column in the radial direction. Each hanging part is fixedly connected between the adjacent first rib plates; each hanging part comprises two supporting arms, at least two second rib plates and check blocks, the supporting arms and the first rib plates are fixedly connected in a one-to-one correspondence mode and extend outwards in the radial direction, the second rib plates are fixed between the two supporting arms at intervals, and each second rib plate corresponds to one check block set. According to the utility model, the vertical quenching cooling is realized through the pit furnace, so that the hanging quantity, the workpiece quality and the production efficiency are improved. The heat treatment device is suitable for heat treatment of long-shaft workpieces.

Description

Technical Field

[0001] The utility model belongs to the technical field of metal material heat treatment devices and relates to a shaft furnace hanger, in particular to a shaft furnace hanger used for heat treatment of long shaft pieces. Background Art

[0002] Long workpieces such as steel pipes, shafts, and slender rods currently experience severe bending during horizontal quenching due to gravity and quenching stresses. This leads to difficulty in straightening, high residual stresses, high processing volume, easy deformation, and poor product performance stability. For high-strength steel workpieces, once quenched, bending is difficult to correct, significantly affecting the yield rate. Utility Model Content

[0003] In order to solve the above deficiencies in the prior art, the present invention aims to provide a shaft furnace hanger for heat treatment of long shaft parts, so as to achieve vertical quenching cooling through the shaft furnace, improve the hanging quantity, workpiece quality and production efficiency.

[0004] purpose.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: A pit furnace hoist for heat treatment of long shaft parts, comprising a lifting assembly, a connecting assembly and a hanging assembly fixedly connected in sequence from top to bottom, the hanging assembly comprising:

[0006] The central connecting portion includes a hollow connecting column and a first rib plate, wherein the hollow connecting column is fixedly connected to the connecting assembly, and a plurality of first rib plates are fixedly connected to the outer wall of the hollow connecting column uniformly along the circumferential direction, and the first rib plates extend radially toward the outside of the hollow connecting column;

[0007] Multiple hanging parts, each hanging part is fixedly connected between adjacent first ribs; each hanging part includes two supporting arms, at least two second ribs and a stopper, the supporting arms are fixedly connected to the first ribs in a one-to-one correspondence and extend radially outward, the second ribs are fixed between the two supporting arms at intervals, each second rib corresponds to a group of stopper groups, a group of stopper groups includes two stoppers fixedly connected to the two supporting arms in a one-to-one correspondence, the stoppers protrude from the supporting arms, and a through groove is formed between the two adjacent groups of stoppers.

[0008] As a limitation of the present invention, the outer end of each first rib is fixedly connected to a curved plate, the curved plate and the first rib form a "Y" shape, and the two outer ends of the curved plate are respectively fixedly connected to the support arms of the adjacent hanging parts.

[0009] As a further limitation of the present invention, there are 6 first ribs, 6 hanging parts, and each hanging part is provided with 3 second ribs.

[0010] As another limitation of the present invention, the connecting assembly includes a rod and a pallet. The top end of the rod is detachably connected to the lifting assembly, and the bottom end of the rod is fixedly connected to the pallet. The rod and the hollow connecting column are clearance-fitted. The diameter of the pallet is larger than the inner diameter of the hollow connecting column and can be clamped under the hollow connecting column.

[0011] As a further limitation of the present invention, the lifting assembly includes a lifting buckle, a balance plate and a connecting pipe that are fixedly connected in sequence from top to bottom, and the connecting pipe is detachably connected to the rod shaft.

[0012] As a further limitation of the present invention, a first connecting hole is provided on the connecting tube, and a second connecting hole is provided on the rod shaft. The rod shaft can be inserted into the connecting tube, and the first connecting hole and the second connecting hole are detachably connected via a pin shaft.

[0013] Due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0014] The utility model solves the problem of severe bending of long shaft parts such as steel pipes, shafts and slender rods during horizontal quenching cooling in the prior art. The utility model adopts the method of vertical quenching cooling in a well-type furnace, that is, by hanging the ring with the long shaft workpiece on the through slot, the workpiece can be placed in a vertical state in the heating furnace for heating, and then hung into the cooling tank to achieve quenching in a vertical state. The utility model improves the straightness of the workpiece, reduces residual stress, reduces processing volume, has good performance stability, and improves production efficiency. In addition, the utility model has an ingenious structural design, a solid structure, can mount a large number of workpieces, and is easy to install, maintain and disassemble; the products produced have high dimensional accuracy and good appearance quality, and can be widely promoted and used.

[0015] The utility model is suitable for heat treatment of long shaft workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0018] Figure 2 This is a schematic structural diagram of a pendant assembly according to an embodiment of the present utility model;

[0019] Figure 3 This is a structural diagram of the pendant assembly according to an embodiment of the utility model from another angle;

[0020] Figure 4 This is a schematic structural diagram of a connection assembly according to an embodiment of the present utility model;

[0021] Figure 5This is a schematic structural diagram of a lifting assembly according to an embodiment of the present invention;

[0022] Figure 6 This is a schematic structural diagram of a lifting ring for suspending a workpiece according to an embodiment of the utility model.

[0023] In the figure: 1, lifting assembly; 11, lifting buckle; 12, balance plate; 13, connecting pipe; 14, first connecting hole;

[0024] 2. Pin;

[0025] 3. Connecting assembly; 31. Tray; 32. Rod shaft; 33. Second connecting hole;

[0026] 4. Hanging assembly; 41. Hollow connecting column; 42. First rib plate; 43. Arc plate; 44. Support arm; 441. Second rib plate; 442. Stopper;

[0027] 51. Lifting ring; 52. Workpiece. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and understand the present invention and are not intended to limit the present invention.

[0029] Example: A shaft furnace hanger for heat treatment of long shafts

[0030] like Figures 1 to 5 As shown, this embodiment includes a lifting assembly 1, a connecting assembly 3 and a hanging assembly 4 which are fixedly connected in sequence from top to bottom.

[0031] The lifting assembly 1 comprises a hook 11, a balance plate 12, and a connecting pipe 13, which are fixedly connected from top to bottom. The hook 11 is used to connect to the overhead crane hook, and the balance plate 12 provides a balance. The connecting pipe 13 is connected to the connecting assembly 3 and has a first connecting hole 14 formed in it.

[0032] The connecting component 3 includes a rod 32 and a tray 31. The top end of the rod 32 is detachably connected to the connecting tube 13. Specifically, a second connecting hole 33 is provided on the rod 32, and the inner diameter of the connecting tube 13 is 5 mm to 10 mm larger than the outer diameter of the rod 32. The rod 32 can be inserted into the connecting tube 13. After the first connecting hole 14 and the second connecting hole 33 are aligned, the rod 32 and the connecting tube 13 are detachably connected by passing the pin 2 through the first connecting hole 14 and the second connecting hole 33. Optionally, the cross-sectional shape of the pin 2 is a flat ellipse. The bottom end of the rod 32 is fixedly connected to the tray 31, and the diameter of the tray 31 is larger than the diameter of the rod 32. The tray 31 is used to be connected to the hanger component 4.

[0033] The hanger assembly 4 includes a central connecting portion and multiple hanging portions. The central connecting portion includes a hollow connecting column 41 and multiple first ribs 42. The hollow connecting column 41 is used to connect to the connecting assembly 3, specifically: the rod shaft 32 and the hollow connecting column 41 are clearance-fitted, the inner diameter of the hollow connecting column 41 is 5mm to 10mm larger than the outer diameter of the rod shaft 32, and the rod shaft 32 can be inserted into the hollow connecting column 41; the diameter of the tray 31 is 10mm to 20mm larger than the inner diameter of the hollow connecting column 41, so that the tray 31 can be clamped under the hollow connecting column 41. Six first ribs 42 are evenly spaced along the circumferential direction on the outer wall of the hollow connecting column 41, and the first ribs 42 extend radially toward the outside of the hollow connecting column 41.

[0034] Each hanging part is fixedly connected between adjacent first ribs 42, so there are a total of six hanging parts in this embodiment. The following will be explained using a group of hanging parts as an example. Each hanging part includes two supporting arms 44, at least two second ribs 441 and a stopper 442. The supporting arms 44 are fixedly connected to the first ribs 42 in a one-to-one correspondence. The supporting arms 44 also extend radially outward along the radial direction of the hollow connecting column 41 in a radial shape. The second ribs 441 are vertically fixedly connected between the two supporting arms 44. In this embodiment, each group of hanging parts is provided with three second ribs 441 arranged at intervals. Each second rib 441 corresponds to a group of stopper groups, so each hanging part is provided with three groups of stopper groups, and each group of stopper groups has two stopper groups 442, so each hanging part is provided with six stopper groups 442. The two blocks 442 in each block group are fixedly connected to the two brackets 44 of the hanging part in a one-to-one correspondence, that is, in one block group, one block 442 is fixed to one bracket 44 of the hanging part, and the other block 442 is fixed to the other bracket 44 of the hanging part. The blocks 442 are all protruding from the top of the bracket 44, so that a through groove is formed between two adjacent block groups, and the through groove can be used to hang the ring 51 (refer to Figure 6 Each hanging portion can be mounted with 1 to 3 long-axis workpieces 52, and the stopper 442 can prevent the hanging ring 51 on which the long-axis workpiece 52 is hung from slipping.

[0035] Preferably, a curved plate 43 is fixedly connected to the outer end of each first rib 42. The curved plate 43 and the first rib 42 form a "Y" shape. That is, the first rib 42 is connected to the lowest point of the curved plate 43, and the two highest points of the curved plate 43 are respectively fixedly connected to the supporting arms 44 of the adjacent hanging parts. In other words, one outer end of the curved plate 43 is fixedly connected to the supporting arm 44 of one hanging part, and the other outer end of the curved plate 43 is fixedly connected to the supporting arm 44 of the other hanging part.

[0036] When assembling this embodiment into a shaft-type furnace sling for heat treatment of long shaft components, first place the shaft 32 vertically, then insert the hollow connecting column 41 from above the shaft 32, so that the tray 31 is clamped on the hollow connecting column 41, thereby assembling the connecting assembly 3 and the hanging assembly 4 together. Then, insert the shaft 32 into the connecting tube 13, align the first through hole with the second through hole, and insert the pin 2 to secure the lifting assembly 1 to the connecting assembly 3.

[0037] When using this embodiment, the prepared workpiece 52 is evenly hung on the supporting arm 44 of each hanging part through the hanging ring 51. The stopper 442 can prevent the hanging ring 51 from slipping. The overhead crane hook is hooked to the hanging buckle 11 of the lifting assembly 1, and then the workpiece 52 is placed in the heating furnace for heating. Then, it is hoisted into the cooling tank to quench the workpiece 52 in the vertical state. Tempering is also carried out in the vertical state.

[0038] It should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art may still modify the technical solutions described in the above embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A shaft furnace hoist for heat treatment of long shafts, comprising a hoisting assembly, a connecting assembly, and a hanging assembly fixedly connected in sequence from top to bottom, characterized in that: The pendant components include: The central connecting portion includes a hollow connecting column and a first rib plate, wherein the hollow connecting column is fixedly connected to the connecting assembly, and a plurality of first rib plates are fixedly connected to the outer wall of the hollow connecting column uniformly along the circumferential direction, and the first rib plates extend radially toward the outside of the hollow connecting column; Multiple hanging parts, each hanging part is fixedly connected between adjacent first ribs; each hanging part includes two supporting arms, at least two second ribs and a stopper, the supporting arms are fixedly connected to the first ribs in a one-to-one correspondence and extend radially outward, the second ribs are fixed between the two supporting arms at intervals, each second rib corresponds to a group of stopper groups, a group of stopper groups includes two stoppers fixedly connected to the two supporting arms in a one-to-one correspondence, the stoppers protrude from the supporting arms, and a through groove is formed between the two adjacent groups of stoppers.

2. The shaft furnace lifting device for heat treatment of long shafts according to claim 1, characterized in that: The outer end of each first rib is fixedly connected to a curved plate, the curved plate and the first rib form a "Y" shape, and the two outer ends of the curved plate are respectively fixedly connected to the supporting arms of the adjacent hanging parts.

3. The shaft furnace lifting device for heat treatment of long shafts according to claim 2, characterized in that: There are 6 first ribs, 6 hanging parts, and 3 second ribs on each hanging part.

4. The shaft furnace lifting device for heat treatment of long shafts according to any one of claims 1 to 3, characterized in that: The connecting assembly includes a rod and a pallet. The top end of the rod is detachably connected to the lifting assembly, and the bottom end of the rod is fixedly connected to the pallet. The rod and the hollow connecting column are clearance-fitted. The diameter of the pallet is larger than the inner diameter of the hollow connecting column and can be clamped under the hollow connecting column.

5. The shaft furnace lifting device for heat treatment of long shafts according to claim 4, characterized in that: The lifting assembly includes a lifting buckle, a balance plate and a connecting pipe which are fixedly connected in sequence from top to bottom, and the connecting pipe is detachably connected to the rod shaft.

6. The shaft furnace lifting device for heat treatment of long shafts according to claim 5, characterized in that: A first connecting hole is provided on the connecting pipe, and a second connecting hole is provided on the rod shaft. The rod shaft can be inserted into the connecting pipe, and the first connecting hole and the second connecting hole are detachably connected via a pin shaft.

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