CN214722089U

CN214722089U - Outer hexagonal large nut dismounting device

Info

Publication number: CN214722089U
Application number: CN202120735967.XU
Authority: CN
Inventors: 时亮; 李哲; 张钊; 常梁
Original assignee: Tangshan City Delong Iron and Steel Co Ltd
Current assignee: Tangshan City Delong Iron and Steel Co Ltd
Priority date: 2021-04-12
Filing date: 2021-04-12
Publication date: 2021-11-16
Anticipated expiration: 2031-04-12

Abstract

A dismounting device for an outer hexagonal large nut comprises a rotary table, a rotary arm, a nut inner sleeve, a balance pressure plate and a tray; the rotary table is provided with a central hole, a nut inner sleeve is fixedly assembled in the central hole of the rotary table, and a plurality of groups of rotating arms and balance pressing plates are uniformly arranged on the rotary table around the central hole; the inner side end of the rotating arm is fixed on the turntable, and the outer side end of the rotating arm is provided with a groove which can be matched with the driving part; a hexagonal through hole matched with the large nut to be disassembled is sleeved in the nut; the balance pressure plate is arranged with the rotating arm in a staggered mode along the circumferential direction of the rotating disc, the outer end of the balance pressure plate is fixed on the rotating disc, the inner end of the balance pressure plate extends to the position above the hexagonal through hole in the nut inner sleeve, and an avoiding space for mounting a bolt of a nut to be dismounted is formed on the inner side of the balance pressure plate; the tray is circular ring-shaped and fixed on the bottom surface of the rotary table, and the outer diameter of the tray is larger than that of the rotary table. The utility model has the characteristics of operating procedure is simple, work efficiency is high, has not only reduced operator intensity of labour, has still eliminated the potential safety hazard in the operation process.

Description

Outer hexagonal large nut dismounting device

Technical Field

The utility model relates to a nut dismounting device, especially a device suitable for outer big nut of hexagonal dismantlement on hot rolling strip steel gear frame box.

Background

In a steel rolling production enterprise, the 650 reversing roughing mill train is suitable for a rolling production line with a short rolling line, because the roughing process is completed by the reversing mill, compared with a full continuous rolling mill, the 650 reversing mill has the characteristic of large equipment load, so that the equipment matched with the 650 reversing mill is heavy equipment, a gear stand of the 650 reversing mill is used as equipment connected with the roughing mill, and the rolling force of the roughing mill can be transmitted to the gear stand through a connecting rod. A650 reversing mill gear base box and an upper cover adopt a screw and nut matched fastening mode, a screw is fastened by M90 double nuts, the nut is a hexagonal nut, and the distance between opposite sides of the nut can reach 145 mm.

When the 650 reversing mill was maintained, the big nut on the gear frame needed to be dismantled, and traditional dismantlement mode is: adopt the steel sheet to cut into with the outer hexagonal assorted of nut self-control spanner, with this self-control spanner suit on big nut, then with hitting of sledgehammer or ram self-control spanner, in order to avoid the thumping to lead to the fact the damage to screw rod or screw thread, still need guarantee in operation process that self-control spanner is parallel with the nut terminal surface, consequently all will adjust the depth of parallelism of spanner and nut terminal surface after striking at every turn. Therefore, the traditional dismounting mode is high in labor intensity of operators and low in working efficiency, and has great potential safety hazards.

SUMMERY OF THE UTILITY MODEL

The utility model provides a big nut dismounting device of outer hexagonal aims at realizing the quick dismantlement of big nut through its cooperation with the overhead traveling crane, reaches and reduces operator intensity of labour, improves work efficiency, reduces the purpose of potential safety hazard in the operation process.

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

a dismounting device for an outer hexagonal large nut comprises a rotary table, a rotary arm, a nut inner sleeve, a balance pressure plate and a tray; the rotary table is provided with a central hole, a nut inner sleeve is fixedly assembled in the central hole of the rotary table, and a plurality of groups of rotating arms and balance pressing plates are uniformly arranged on the rotary table around the central hole; the inner side end of the rotating arm is fixed on the turntable, and the outer side end of the rotating arm is provided with a groove which can be matched with the driving part; a hexagonal through hole matched with the large nut to be disassembled is sleeved in the nut; the balance pressure plate is arranged with the rotating arm in a staggered mode along the circumferential direction of the rotating disc, the outer end of the balance pressure plate is fixed on the rotating disc, the inner end of the balance pressure plate extends to the position above the hexagonal through hole in the nut inner sleeve, and an avoiding space for mounting a bolt of a nut to be dismounted is formed on the inner side of the balance pressure plate; the tray is circular ring-shaped and fixed on the bottom surface of the rotary table, and the outer diameter of the tray is larger than that of the rotary table.

According to the outer hexagonal large nut dismounting device, the rotary disc is provided with the lightening holes, and the lightening holes are located between the two adjacent groups of the rotating arms.

According to the outer hexagonal large nut dismounting device, the rotating arm and the balance pressing plate are fixedly matched with the rotary table in a rotating mode in a welding mode.

According to the outer hexagonal large nut dismounting device, the number of the rotating arms and the number of the balance pressing plates are six.

The outer hexagonal large nut dismounting device is characterized in that lifting lugs are arranged on two groups of rotating arms which are opposite to each other in the radial direction of the rotating disc.

The outer hexagonal large nut dismounting device provides driving force for the steel wire rope and the crown block through the matching of the steel wire rope and the crown block, and is also provided with a fixed pulley component for realizing the steering of the steel wire rope, and the fixed pulley component is arranged on a fixing device which is arranged opposite to the large nut to be dismounted; one end of the steel wire rope is connected with a crane hook, and the other end of the steel wire rope is connected with a group of rotating arms after winding the rotating disc for a circle in the horizontal direction around the fixed pulley.

The utility model relates to an outer hexagonal big nut dismounting device, which can realize the circumferential positioning function of a workpiece by matching a nut inner sleeve with the outer wall of a big nut to be dismounted, and ensure that a turntable and the big nut to be dismounted synchronously rotate; the balance pressing plate is matched with the end face of the large nut to realize the plane positioning effect, so that the damage to the nut and the thread part of the bolt matched with the nut in the disassembling process is avoided; the steel wire rope and the crown block are matched to provide power for driving the rotary table to rotate, so that the rotary table drives the large nut to rotate in the unscrewing direction through the nut inner sleeve, and the outer hexagonal large nut dismounting operation is completed. Because the utility model discloses continuously providing the dismantlement power through wire rope at whole dismantlement in-process by the overhead traveling crane, the dismantlement process is sustainable to be gone on, consequently has the characteristics that operating procedure is simple, work efficiency is high, has not only reduced operator intensity of labour with traditional spanner hammering method comparison, has still eliminated the potential safety hazard in the operation process.

Drawings

Fig. 1 is a schematic view of an embodiment of a dismounting device for a large outer hexagonal nut according to the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic view of the cross-sectional structure A-A of FIG. 2;

FIG. 4 is a schematic view of the structure of the present invention cooperating with a large nut to be disassembled;

FIG. 5 is a schematic view of the working state of the present invention;

fig. 6 is a schematic view of the direction K of the present invention in the state of fig. 5.

The list of labels in the figure is:

1. 1-1 parts of a rotating disc and lightening holes; 2. A rotating arm; 3. An inner sleeve of the nut; 4. A balance pressure plate; 5. A tray; 6. Lifting lugs; 7. A large nut; 8. Bolt, 9, fixed pulley assembly, 10, wire rope, 11, gear frame box, 12, rolling mill organism, 13, overhead traveling crane lifting hook.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, 2, 3 and 4, the outer hexagonal big nut dismounting device of the present invention includes a rotary table 1, a rotary arm 2, a nut inner sleeve 3, a balance pressing plate 4 and a tray 5; the rotary table 1 is made of a steel plate through cutting, the rotary table 1 is provided with a central hole, a nut inner sleeve 3 is fixedly assembled in the central hole of the rotary table 1, six lightening holes 1-1 are distributed along the circumferential direction, six groups of rotating arms 2 and six groups of balance pressing plates 4 are uniformly distributed on the rotary table 1 around the central hole, the six groups of rotating arms 2 and the lightening holes 1-1 of the rotary table 1 are distributed in a staggered mode, the six groups of balance pressing plates 4 are arranged opposite to the six lightening holes 1-1, the balance pressing plates 4 are located on the inner sides of the lightening holes 1-1, and the weight of the rotary table can be lightened on the basis of ensuring the strength through the lightening holes 1-1; the rotating arms 2 are made of steel plates through cutting, the inner side ends of the rotating arms 2 are welded on the rotating disc 1, grooves capable of being matched with a driving part are formed in the outer side ends, and lifting lugs 6 are arranged on two groups of rotating arms 2 opposite to each other in the radial direction of the rotating disc 1; the balance pressure plate 4 is made by cutting a steel plate or cutting the balance pressure plate by adopting a flat key, the outer end of the balance pressure plate is welded on the turntable 1, the inner end of the balance pressure plate extends to the position above the hexagonal through hole of the nut inner sleeve 3, and an avoiding space for assembling a bolt 8 of a large nut to be disassembled is formed on the inner side of the balance pressure plate 4; the nut inner sleeve 3 is made of a steel plate through cutting, and a hexagonal through hole matched with the large nut 7 to be disassembled is formed in the center of the nut inner sleeve; the tray 5 is circular and is made of steel plates in a cutting mode, the tray 5 is fixed to the bottom surface of the rotary table 1 in a welding mode, and the outer diameter of the tray 5 is larger than that of the rotary table 1.

Referring to fig. 5 and 6, the outer hexagon nut dismounting device of the present invention is suitable for dismounting the outer hexagon nut 7 on the gear frame box 11 of the hot rolling strip mill, and it can provide driving force for the hot rolling strip mill through the cooperation of the steel wire rope 10 and the crown block, so it is also provided with a fixed pulley assembly 9 for realizing the steering of the steel wire rope 10; the fixed pulley assembly 9 is arranged on a rolling mill body 12 opposite to the large nut 7 to be disassembled; one end of the steel wire rope 10 is connected with a crane hook 13, and the other end of the steel wire rope is connected with a group of rotating arms 2 after winding the rotating disc 1 for a circle in the horizontal direction around the fixed pulley.

Referring to fig. 5 and 6, four groups of bolts 8 are distributed above a gear frame box 11 of the 650 reversing mill, two large nuts 7 are mounted on each group of bolts 8, when the large nuts 7 are disassembled, firstly, the fixed pulley assembly 9 in the structure of the utility model is mounted on a fixed part of a reversing mill body 12, and the central axis of the fixed pulley assembly 9 is ensured to be vertical to the central axis of the large nut disassembling device; then the hanging chain of the crown block is matched with the lifting lug 6 of the utility model to lift the lifting lug to the upper part of the large nut 7 to be removed; then, sleeving the nut inner sleeve 3 on the large nut 7, and contacting the balance pressure plate 4 with the upper end surface of the nut 7 to ensure that the outer hexagonal large nut dismounting device keeps a horizontal state; after the wire rope 10 with rope sleeves at two ends is wound for a circle along the outer ring of the turntable 1, the wire rope sleeve at one end is fixed on the groove of the rotating arm 2, the wire rope sleeve at the other end bypasses the fixed pulley 9, and the rope sleeve is fixed on a crane hook 13; the crown block lifting hook 13 rises to pull the steel wire rope 10, and the steel wire rope 10 converts the vertical pulling force of the crown block lifting hook 13 into the power for driving the turntable 1 to rotate through the fixed pulley assembly 9, so that the large nut 7 is rapidly detached.

Claims

1. A dismounting device for an outer hexagonal large nut is characterized by comprising a rotary table (1), a rotary arm (2), a nut inner sleeve (3), a balance pressing plate (4) and a tray (5); the rotary table (1) is provided with a central hole, a nut inner sleeve (3) is fixedly assembled in the central hole of the rotary table, and a plurality of groups of rotating arms (2) and balance pressing plates (4) are uniformly arranged on the rotary table (1) around the central hole; the inner side end of the rotating arm (2) is fixed on the turntable (1), and the outer side end is provided with a groove which can be matched with a driving part; the nut inner sleeve (3) is provided with a hexagonal through hole matched with the large nut (7) to be disassembled; the balance pressure plate (4) is arranged with the rotating arms in a staggered mode along the circumferential direction of the rotating disc (1), the outer end of the balance pressure plate is fixed on the rotating disc (1), the inner end of the balance pressure plate extends to the position above the hexagonal through hole of the nut inner sleeve (3), and an avoiding space for assembling a large nut to be disassembled is formed on the inner side of the balance pressure plate (4); the tray (5) is annular and is fixed on the bottom surface of the turntable (1), and the outer diameter of the tray (5) is larger than that of the turntable (1).

2. The dismounting device for the large outer hexagonal nut as claimed in claim 1, wherein the rotary table (1) is provided with lightening holes (1-1), and the lightening holes (1-1) are positioned between two adjacent groups of rotating arms (2).

3. The dismounting device for the large outer hexagonal nut as claimed in claim 1 or 2, wherein the rotating arm (2) and the balance pressing plate (4) are fixedly and rotatably matched with the rotating disc (1) in a welding mode.

4. The dismounting device for the large outer hexagonal nut as claimed in claim 3, wherein the number of the rotating arms (2) and the balancing pressing plates (4) is six.

5. Device for removing large external hexagonal nuts according to claim 4, characterized in that lifting lugs (6) are arranged on two sets of rotating arms (2) which are diametrically opposite to each other along the rotating disc (1).

6. The dismounting device for the large outer hexagonal nut as claimed in claim 5, wherein the dismounting device provides driving force for the large outer hexagonal nut through the matching of the steel wire rope (10) and the crown block, and is further provided with a fixed pulley component (9) for realizing the steering of the steel wire rope (10); the fixed pulley assembly (9) is arranged on a fixing device which is arranged opposite to the large nut (7) to be disassembled; one end of the steel wire rope (10) is connected with a crane hook (13), and the other end of the steel wire rope is connected with a group of rotating arms (2) after winding the rotating disc (1) for a circle along the horizontal direction around the fixed pulley.