CN220596769U

CN220596769U - Hoisting tool for large-tonnage long shaft

Info

Publication number: CN220596769U
Application number: CN202322081143.7U
Authority: CN
Inventors: 李永茂
Original assignee: CSSC Nanjing Luzhou Machine Co Ltd
Current assignee: CSSC Nanjing Luzhou Machine Co Ltd
Priority date: 2023-08-04
Filing date: 2023-08-04
Publication date: 2024-03-15
Anticipated expiration: 2033-08-04

Abstract

The utility model discloses a hoisting tool for a large-tonnage long shaft, which comprises a hoisting ring, a hoisting seat, a transverse pin, a double-layer hoisting rod, a bolt and a spoke plate. The hanging ring passes through the hanging seat to be placed and is integrated with the hanging seat; the upper flat position of the double-layer suspender is provided with a hole, the hole is connected with the suspension seat by a transverse pin, the lower part is cuboid, the bottom end of the double-layer suspender is provided with a U-shaped groove, both sides of the groove are provided with holes, and the double-layer suspender is connected with the spoke plate by a bolt. The whole web is in a clothing shape, the upper part of the web is in a semi-annular shape and is connected with the double-layer suspender through a bolt, the lower part of the web is provided with an opening, two sides of the opening are provided with cutting openings, and long shafts are welded and fixed at the cutting positions. The assembly method of the tool comprises the steps of manufacturing the tool, assembling the tool, installing shaft parts, placing the tool and the like. By adopting the structure, the large-tonnage long shaft can be hung in the air, and the occurrence of heat treatment distortion is reduced; the assembly method improves the stability of the tool in the process of hanging the workpiece, is simple and convenient to operate, and saves manpower.

Description

Hoisting tool for large-tonnage long shaft

Technical Field

The utility model relates to a lifting tool, in particular to a heat treatment lifting tool for large-tonnage long-axis parts, and belongs to the field of heat treatment technology and tools.

Background

In the prior art, low-carbon round steel such as A3 steel or 20 steel is used as a lifting appliance before heat treatment of long-axis parts in the ship manufacturing process, the round steel needs to be heated at the middle part and the two ends of the round steel by oxygen-acetylene flame, so that the round steel has better plasticity, then the round steel is manually bent into a lifting ring and forms a certain angle, the lifting appliance is in a V-like shape, and then the two ends of the lifting appliance are respectively welded to the shaft ends to lift the effect of a hanging shaft, and the structure is shown in figure 1. When the low-carbon round steel is used as a lifting appliance, the mass of the shaft is not more than 3000kg, and the maximum diameter of the round steel is not more than phi 50mm. When the mass of the shaft is larger, the diameter of the used hanging tool is larger to bear the hanging tonnage of the shaft. The larger the diameter of the round steel, the more difficult it is to deform, or even to bend it, by means of manual combination with oxy-acetylene flame heating.

Disclosure of Invention

The utility model aims to solve the technical problems of overcoming the defects of the prior art and providing the lifting tool with a reasonable structure, convenient use, stability and safety and a large-tonnage long shaft, which can suspend the large-tonnage long shaft in the air and reduce the occurrence of heat treatment distortion; and the stability of the tool in the process of hanging the workpiece can be improved.

The utility model adopts the following technical scheme for solving the technical problems: a hoisting tool for a large-tonnage long shaft comprises a hoisting ring, a hoisting seat, a hoisting rod, a radial plate and shaft parts which are sequentially connected from top to bottom; the hanging seat is connected with the crane through a hanging ring arranged above the hanging seat and hung outside the furnace, the top end of the hanging rod is connected with the hanging seat through a transverse pin inserted into the opening, the lower part of the hanging rod is arranged in the furnace, and the bottom of the hanging rod is connected with the spoke plate through a connecting piece; the upper part of the spoke plate is semi-annular, a hole site matched with the bottom of the suspender is formed in the spoke plate, an opening is formed in the lower part of the spoke plate, split openings are symmetrically formed in two sides of the opening, and the opening is fixedly connected with a shaft part in a welding mode; the relation between the cross section S (unit mm 2) of the lower part cutting part of the web and the welding part of the shaft and the mass G (unit kg) of the shaft part is as follows: g is less than or equal to kappa.2S, wherein k is a safety coefficient, and the value range is 0.8-0.9; when the furnace is filled, the suspender passes through the furnace cover hole and is placed outside the furnace together with the hanging seat, so that the strength of the suspender is prevented from being reduced under the influence of high temperature in the furnace by matching the suspender with the transverse pin, and instability is prevented from occurring; the web and shaft parts connected to the lower part of the hanger rod are placed in a furnace so that the shaft parts can be heat treated.

Further, the hanging seat comprises a hanging seat body and supporting parts extending outwards along two sides of the upper part of the hanging seat body, wherein the supporting parts are arranged on a supporting platform outside the furnace and are used for hanging in a lifting manner; the lifting seat body is provided with a lifting hole for connecting the lifting ring, a pin hole for installing a transverse pin is also formed below the lifting hole, and the lifting hole and the pin hole are positioned on the same axis.

Furthermore, semicircular grooves are symmetrically formed at the joint of the supporting part and the hanging seat body. The lifting seat structure not only reduces the weight of the lifting seat body, but also is beneficial for the lifting ring to pass through the groove, the lifting ring is light and convenient, and the lifting seat structure is convenient for manual taking and putting operation on the travelling car coupler.

Further, the width of the support portion is gradually reduced toward the distal end.

Further, the suspender is a double-layer suspender and comprises a suspender body and a suspender base connected with the suspender body, the bottom of the suspender is a rectangular block, a U-shaped groove is processed along the center of the rectangular block, the rectangular block is divided into two parallel plate-shaped structures, and the U-shaped groove is clamped at the top end of the spoke plate; mounting holes for mounting bolts are symmetrically formed in the two plate-shaped structures, and after the bolts sequentially pass through the mounting holes and the U-shaped grooves, the hanging rods and the radial plates are fixedly connected; the top of the suspender body is provided with two planes extending upwards to form a connecting part which can be inserted into the hanging seat, and transverse pin holes are formed in the two planes, so that the top end of the suspender is fixedly connected with the hanging seat through transverse pins.

The thickness of the top of the suspender is smaller than the distance of 4-8mm from the opening of the bottom of the suspension seat, and the thickness cannot be larger than the opening of the bottom of the suspension seat, so that the upper end of the double-layer suspender can penetrate into the bottom of the suspension seat; the bottom of the double-layer suspender is cuboid, the lower part of the cuboid is provided with a U-shaped groove which plays a role in bearing the spoke plate and the shaft from the middle, the distance between the U-shaped grooves is larger than the thickness of the spoke plate, the ring at the upper end of the spoke plate can penetrate into the bottom of the double-layer suspender, and two sides of the U-shaped groove are provided with holes with a common center line for being matched with a bolt to hang the spoke plate and the shaft.

Further, the spoke plate is composed of a semicircular ring comprising an upper half part, the bottom edge of the semicircular ring is overlapped with the top edge of an isosceles trapezoid, the isosceles trapezoid is overlapped with the rectangle of a lower half part in a hole, the lower part of the spoke plate is opened and cut into two sides extending out to be welded and fixed with the shaft part, and the hole in the spoke plate is matched with the outer surface of the bolt.

Further, the width of the opening of the web is 1-2 mm larger than the diameter of the shaft end.

Compared with the prior art, the technical scheme provided by the utility model has the following advantages:

the hoisting tool has the advantages of large long-axis tonnage, small shaft distortion, simple tool assembly operation and labor saving. The special radial plate is welded on the long shaft and is matched with other tools to suspend the long shaft, so that stability is maintained, and the problem of hanging the large-tonnage long shaft is solved.

Drawings

Fig. 1 is a schematic structural diagram of a hoisting tool in the prior art.

Fig. 2 is a schematic diagram of the whole structure of the tooling of the present utility model.

FIG. 3 is a schematic view of a large tonnage long axis hanging structure of the present utility model.

Fig. 4 is a schematic view of a hanger bracket according to the present utility model.

Fig. 5 is a schematic view of a lifting ring according to the present utility model.

Fig. 6 is a schematic view of the cross pin structure of the present utility model.

FIG. 7 is a schematic view of a double-deck boom construction of the present utility model.

Fig. 8 is a schematic view of a latch structure according to the present utility model.

FIG. 9 is a schematic view of the web structure of the present utility model.

Description of the drawings: 1-hanging rings, 2-hanging seats, 3-cross pins, 4-double-layer hanging rods, 5-bolts, 6-webs and 7-large-tonnage long shafts.

Detailed Description

The technical scheme of the utility model is further described in detail below with reference to the accompanying drawings:

the hoisting tool for the large-tonnage long-axis part structurally comprises a hoisting ring, a hoisting seat, a double-layer hoisting rod arranged at the lower part of the hoisting seat and connected with the hoisting seat, and a radial plate arranged at the lower part of the hoisting rod, wherein the structure of the hoisting tool is shown in figures 2 to 9. The method is characterized in that: the hanging seat is hung outside the furnace, the lower part of the double-layer hanging rod is positioned in the furnace, and the web connected with the bottom of the double-layer hanging rod is in a clothes shape. The webThe upper part is semi-annular, a hole is arranged in the ring, an opening is arranged at the lower part, two sides of the opening are provided with cutting openings C20-30, shaft parts are welded at the cutting positions, and the width of the opening is 1-2 mm larger than the diameter of the shaft. The lower opening of the web plate is welded with a fixed shaft part; the cross section S (unit mm) of the welding part of the lower part of the web and the shaft ² ) The relation with the mass G (unit kg) of the shaft part satisfies: g is less than or equal to kappa.2S, wherein k is a safety coefficient, and the value range is 0.8-0.9; when the furnace is filled, the double-layer suspender passes through the furnace cover hole and is placed outside the furnace together with the hanging seat, so that the strength of the double-layer suspender is prevented from being reduced under the influence of high temperature in the furnace when the double-layer suspender is matched with the transverse pin, and instability is prevented from occurring; the web and shaft parts connected at the lower part of the double boom are placed in a furnace so that the shaft parts can be heat treated. The thickness of the web and the width of the shaft welding part are important indexes of bearing capacity, and the two are multiplied to obtain the cross section area, so that the bearing capacity is ensured.

The double-layer suspender is connected with the suspension seat through a transverse pin. The double-layer suspender top is two planes with a certain thickness, the thickness cannot be larger than the opening at the bottom of the hanging seat, the upper end of the double-layer suspender can penetrate into the bottom of the hanging seat, and transverse pin holes are formed in the two planes. The bottom of the double-layer suspender is cuboid, the lower part of the cuboid is provided with a U-shaped groove from the middle, the distance between the U-shaped grooves is larger than the thickness of the spoke plate, the ring at the upper end of the spoke plate can penetrate into the bottom of the double-layer suspender, and two sides of the U-shaped groove are provided with holes with a common center line for being matched with a bolt to hang the spoke plate and a shaft. After the tooling is assembled, the U-shaped groove is arranged at the lower part of the double-layer hanging bracket and plays a role of bearing the radial plate and the shaft.

The spoke plate is composed of a semicircular ring comprising an upper half part, the bottom edge of the semicircular ring is overlapped with the top edge of an isosceles trapezoid, the isosceles trapezoid is formed by a rectangle of a lower half part, the inside of a hole of the semicircular ring is overlapped on a bolt, the lower part of the semicircular ring is opened, two sides of the semicircular ring extend out to be welded and fixed with shaft parts, and the hole in the spoke plate is matched with the outer surface of the bolt. The web plate with the structure has a certain degree of stability, and the lower part of the web plate is welded with a fixed shaft part to ensure that the shaft is vertically suspended. The mass G of the shaft part hung on the lower part of the web is more than 3000kg.

The assembly method of the hoisting tool for the large-tonnage long-axis part in the embodiment comprises the following steps:

first, manufacturing a tool: manufacturing a hanging seat, wherein the hanging seat is cast by adopting ZG25 material, and is subjected to normalizing treatment after casting, and the normalizing process comprises the following steps: 930 ℃ x 3.5H, and air cooling; manufacturing a transverse pin, wherein the transverse pin is formed by rolling 20 steel or A3 steel; manufacturing a double-layer suspender, wherein the double-layer suspender is formed by forging 20 steel, and is subjected to normalizing treatment after forging, and the normalizing process comprises the following steps: 930 ℃ x 3.5H, and air cooling. Machining two planes on the top of the double-layer suspender, manufacturing a transverse pin hole, machining a U-shaped groove on the bottom of the double-layer suspender, and boring two bolt holes; manufacturing a web, wherein the web is made of a 20-steel plate, and is processed by a flame cutting machine and deburred; the bolt is manufactured by rolling 20 steel.

Secondly, assembling a tool: the top of the double-layer suspender is aligned to the bottom of the suspension seat and is connected by a transverse pin.

Thirdly, installing a large-ton long shaft part: the shaft part and the welding rod are preheated, so that the surface to be welded of the shaft part and the welding rod are ensured to be dried, and the welding quality is ensured. After preheating, welding a spoke plate at the top of the large-ton long shaft part, penetrating the spoke plate between U-shaped grooves at the bottom of the double-layer suspender after welding, enabling the center line of holes on the spoke plate to coincide with the center line of holes on the U-shaped grooves, penetrating a bolt, and enabling the bolt to penetrate through the spoke plate holes and two holes on the U-shaped grooves at the same time. Meanwhile, before welding the web, the horizontal central position line of the shaft end needs to be determined on the shaft, the opening part of the web penetrates into the central position line of the shaft end, the web is horizontally placed, two upward welding seams are respectively welded at the opening part of the web, and after welding, the shaft and the web 180 are turned over ^。 And then welding to obtain two welding seams. By adopting the method, the center of gravity of the large-tonnage long shaft is kept, the distortion of the large-tonnage long shaft is reduced, and the stability of the tool is also facilitated.

A fourth part for placing a tool; the double-layer hanger and the hanging radials and shaft parts are placed inside, and the height of the double-layer hanger is adjusted, so that a transverse pin hole at the top of the double-layer hanger is positioned outside the heat treatment furnace, and then the hanger is fixed.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the specific embodiments described above, and that the above specific embodiments and descriptions are provided for further illustration of the principles of the present utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as defined in the appended claims. The scope of the utility model is defined by the claims and their equivalents.

Claims

1. The utility model provides a large-tonnage major axis's lifting by crane frock which characterized in that: comprises a hanging ring, a hanging seat, a hanging rod, a radial plate and shaft parts which are sequentially connected from top to bottom; the hanging seat is connected with the crane through a hanging ring arranged above the hanging seat and hung outside the furnace, the top end of the hanging rod is connected with the hanging seat through a transverse pin inserted into the opening, the lower part of the hanging rod is arranged in the furnace, and the bottom of the hanging rod is connected with the spoke plate through a connecting piece; the upper part of the spoke plate is semi-annular, a hole site matched with the bottom of the suspender is formed in the spoke plate, an opening is formed in the lower part of the spoke plate, split openings are symmetrically formed in two sides of the opening, and the opening is fixedly connected with a shaft part in a welding mode; the suspender passes through the furnace cover hole and is placed outside the furnace together with the hanging seat, and the radials and the shaft parts connected with the lower part of the suspender are placed in the furnace, so that the shaft parts can be heat treated.

2. The large tonnage long shaft hoisting tool according to claim 1, wherein: the hanging seat comprises a hanging seat body and supporting parts extending outwards along two sides of the upper part of the hanging seat body, wherein the supporting parts are arranged on a supporting platform outside the furnace and are used for hanging in a lifting manner; the lifting seat body is provided with a lifting hole for connecting the lifting ring, a pin hole for installing a transverse pin is also formed below the lifting hole, and the lifting hole and the pin hole are positioned on the same axis.

3. The large tonnage long shaft hoisting fixture according to claim 2, characterized in that: semicircular grooves are symmetrically formed at the joint of the supporting part and the hanging seat body.

4. The large tonnage long shaft hoisting fixture according to claim 2, characterized in that: the support portion has a width that tapers distally.

5. The large tonnage long shaft hoisting tool according to claim 1, wherein: the hanger rod is a double-layer hanger rod and comprises a hanger rod body and a hanger rod base connected with the hanger rod body, the bottom of the hanger rod is a rectangular block, a U-shaped groove is processed along the center of the rectangular block, the rectangular block is divided into two parallel plate-shaped structures, and the U-shaped groove is clamped at the top end of the spoke plate; mounting holes for mounting bolts are symmetrically formed in the two plate-shaped structures, and after the bolts sequentially pass through the mounting holes and the U-shaped grooves, the hanging rods and the radial plates are fixedly connected; the top of the suspender body is provided with two planes extending upwards to form a connecting part which can be inserted into the hanging seat, and transverse pin holes are formed in the two planes, so that the transverse pin holes on the suspender are overlapped with the pin holes on the hanging seat, and the top end of the suspender is fixedly connected with the hanging seat through a transverse pin.

6. The large tonnage long shaft hoisting tool according to claim 1, wherein: the spoke plate is composed of a semicircular ring comprising an upper half part, the bottom edge of the semicircular ring is overlapped with the top edge of an isosceles trapezoid, the isosceles trapezoid is overlapped with the rectangle of a lower half part, the inside of a hole of the isosceles trapezoid is overlapped on a plug pin, two sides of an opening at the lower part of the spoke plate extend out to be welded and fixed with shaft parts, and the hole on the spoke plate is matched with the outer surface of the plug pin.

7. The large tonnage long shaft hoisting tool according to claim 1, wherein: the width of the web opening is 1-2 mm larger than the diameter of the shaft end.