CN212451512U - Heat treatment tool for large-caliber wear-resistant cast iron pipe - Google Patents
Heat treatment tool for large-caliber wear-resistant cast iron pipe Download PDFInfo
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- CN212451512U CN212451512U CN202021031992.1U CN202021031992U CN212451512U CN 212451512 U CN212451512 U CN 212451512U CN 202021031992 U CN202021031992 U CN 202021031992U CN 212451512 U CN212451512 U CN 212451512U
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Abstract
The utility model provides a heat treatment tool for a large-caliber wear-resistant cast iron pipe, which comprises a lifting hook, an upper circular ring and a lower circular ring which are oppositely arranged and have the same size, wherein the lifting hook is connected with the upper end surface of the upper circular ring; the upper end and the lower end of the first lacing wire are respectively welded with the upper ring and the lower ring to form a suspension cage with a gap; and after the cast iron pipe to be subjected to heat treatment is arranged in the suspension cage, the upper end and the lower end of the second lacing wire are respectively welded with the upper circular ring and the lower circular ring. The utility model discloses the second lacing wire that sets up just welds with upper and lower ring after the cage packs into the cast iron pipe, has avoided directly welding on the pipe fitting, and is more firm reliable than connected modes such as bolt, buckle, and the cage structure is simple and convenient moreover, adopts the quenching and the tempering of same frock completion cast iron pipe around, can effectively guarantee whole heat treatment process's smooth and easy nature.
Description
Technical Field
The utility model relates to a heat treatment technical field, concretely relates to wear-resisting cast iron pipe heat treatment frock of heavy-calibre.
Background
The high-chromium cast iron is wear-resistant alloy white cast iron, has high wear resistance, proper toughness and high corrosion resistance, is widely applied, is successfully used for parts which are easily worn seriously, such as a titanium dioxide fine mill, a coal mill and the like, and has obvious economic benefit.
At present, the heat treatment of large-caliber high-chromium wear-resistant cast iron pipes comprises quenching and tempering, wherein the quenching is heated by a pit furnace, and the tempering is heated by a trolley furnace. In the quenching and heating process, the large-caliber high-chromium wear-resistant cast iron pipe must be vertically hung in a furnace for the reasons of high heating temperature and long heating time, so that the deformation in the heating process can be avoided; in the tempering heating process, the cast iron pipe cannot be directly placed on a trolley furnace steel plate to be in contact tempering. However, the cast iron pipe is easy to crack after being welded, so that a lifting hook cannot be directly welded on the pipe fitting for hanging; in addition, the smoothness of the whole heat treatment process is influenced by adopting different tools from quenching to tempering, namely, the cast iron pipe is transferred from the pit furnace to the trolley furnace.
In view of the above, a new heat treatment tool must be designed to complete the quenching and tempering of the cast iron pipe.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a heavy-calibre wear-resisting cast iron pipe thermal treatment frock, the structure is simple and convenient and firm, can hang the cast iron pipe and accomplish the quenching heating in the pit furnace, then treat that its quenching cooling accomplishes the back, the cast iron pipe directly gets into the platform truck stove together with the frock and accomplishes the tempering heating, can effectively guarantee whole thermal treatment process's smooth and easy nature.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the utility model provides a heat treatment tool for a large-caliber wear-resistant cast iron pipe, which comprises a lifting hook, an upper circular ring and a lower circular ring which are oppositely arranged and have the same size, wherein the lifting hook is fixedly connected with the upper end surface of the upper circular ring; the upper end and the lower end of the first lacing wire are respectively welded with the upper ring and the lower ring to form a suspension cage with a gap; and after the cast iron pipe to be subjected to heat treatment is arranged in the suspension cage, the upper end and the lower end of the second lacing wire are respectively welded with the upper circular ring and the lower circular ring.
Furthermore, the upper and lower ends of the first tie bar and the second tie bar are respectively welded with a positioning block for positioning the cast iron pipe and bearing the gravity of the cast iron pipe during horizontal tempering, and the positioning block is positioned in the radial direction of the suspension cage and faces the axial direction of the suspension cage.
Furthermore, a gap of 5-10 mm is formed between the positioning block and the outer side wall of the cast iron pipe.
Furthermore, gaps are arranged on the outer circumferential surfaces of the upper ring and the lower ring at equal intervals.
Furthermore, first lacing wire, second lacing wire are the round steel, the breach is the semicircle breach, its radius equals the radius of first lacing wire and second lacing wire.
Furthermore, the outer diameter of the upper ring and the lower ring is 60mm larger than the outer diameter of the cast iron pipe, and the inner diameter of the upper ring and the lower ring is 20mm smaller than the inner diameter of the cast iron pipe.
Furthermore, the upper end surfaces of the first lacing wire and the second lacing wire are respectively flush with the upper end surface of the upper ring, the lower end surfaces of the first lacing wire and the second lacing wire are respectively flush with the lower end surface of the lower ring, and the length of the first lacing wire and the length of the second lacing wire is 10mm greater than the sum of the thickness of the upper ring and the thickness of the lower ring and the length of the cast iron pipe.
Furthermore, the number of the first lacing wires is 3, and the first lacing wires and the second lacing wires are divided into four equal parts, namely the upper circular ring and the lower circular ring.
Furthermore, the lifting hook is made of round steel and is of an inverted V-shaped structure, and two ends of the lifting hook are respectively welded with the upper end face of the upper ring.
Furthermore, the lifting hook, the upper ring, the lower ring, the first lacing wire, the second lacing wire and the positioning block are all made of stainless steel.
Compared with the prior art, the utility model provides a wear-resisting cast iron pipe heat treatment frock of heavy-calibre has following beneficial effect:
1. the second lacing wire is welded with the upper and lower circular rings after the suspension cage is arranged in the cast iron pipe, so that the direct welding on the pipe fitting is avoided, the connection mode is firmer and more reliable than that of bolts, buckles and the like, the suspension cage is simple and convenient in structure, the quenching and tempering of the cast iron pipe are completed by adopting the same tool before and after the suspension cage, and the smoothness of the whole heat treatment process can be effectively ensured;
2. the lifting hook, the upper ring, the lower ring, the first lacing wire, the second lacing wire and the positioning block are all made of stainless steel, so that the lifting hook can not deform after bearing long-time high-temperature heating, and the firmness of the tool is further improved.
Drawings
FIG. 1 is a schematic view of the three-dimensional structure of the cast iron pipe of the present invention;
fig. 2 is a schematic perspective view of the present invention;
FIG. 3 is an enlarged view of a portion A of FIG. 2;
fig. 4 is a schematic perspective view of the upper ring and/or the lower ring.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.
As shown in fig. 1 to 4, the utility model provides a heat treatment tool for large-caliber wear-resistant cast iron pipes, which comprises a hook 1, an upper ring 2 and a lower ring 3 which are oppositely arranged and have the same size, wherein the hook 1 is connected with the upper end surface of the upper ring 2, at least two first lacing wires 4 and a second lacing wire 5 are vertically connected between the upper ring 2 and the lower ring 3, the first lacing wires 4 are parallel to the second lacing wires 5 and are uniformly distributed around the centers of the upper ring 2 and the lower ring 3, namely, the distance between the first lacing wires 4 and the second lacing wires 5 is equal; the upper end and the lower end of the first lacing wire 4 are respectively welded with the upper circular ring 2 and the lower circular ring 3 to form a suspension cage with a gap; after the cast iron pipe to be heat treated is arranged in the suspension cage, the upper end and the lower end of the second lacing wire 5 are respectively welded with the upper circular ring 2 and the lower circular ring 3. When the tool is used, the tool which is filled with the cast iron pipe to be heat-treated is vertically placed into a pit furnace for quenching and heating through external hoisting equipment, the tool and the cast iron pipe are horizontally placed after the furnace is taken out of the furnace and the quenching and cooling are finished, the tool is not disassembled, the tool and the cast iron pipe are placed into a trolley furnace together for tempering and heating, the tool and the cast iron pipe are removed from the trolley furnace after the tool and the cast iron pipe are heated for a set time, then the second tie bar 5 is taken down in a gas cutting mode (the rest parts can be reused), the notch of the suspension cage is reopened, the cast iron pipe is conveniently taken out, and the heat treatment of the cast iron pipe is; then, a new cast iron pipe to be heat treated is put into the suspension cage, a new second lacing wire 5 is welded, and the process is repeated. The first tie bars 4 and the second tie bars 5 are connected with the upper circular ring 2 and the lower circular ring 3 in a welding mode, so that the influence caused by high temperature in the heat treatment process can be avoided, the connection mode is more firm and reliable compared with the connection modes such as bolt connection, buckle connection and the like, the suspension cage is simple and convenient in structure, the quenching and tempering of the cast iron pipe are completed by the same tool in the front and at the back, and the smoothness of the whole heat treatment process can be effectively guaranteed.
As shown in fig. 2 and 3, the upper and lower ends of the first tie bar 4 and the second tie bar 5 are respectively welded with a positioning block 6 for positioning the cast iron pipe and bearing the gravity thereof during the flat tempering, and the positioning block 6 is located in the radial direction of the suspension cage and faces the axial direction of the suspension cage. Specifically, the positioning blocks 6 at the upper end and the lower end are correspondingly and uniformly arranged, and the dislocation error is less than or equal to 3 mm; the specific size of the positioning block 6 is 20mm in width, 20mm in thickness and 40mm in length; a gap of 5-10 mm is formed between the cast iron pipe and the outer side wall of the cast iron pipe, and the gap is used as expansion allowance when the cast iron pipe is heated.
In order to facilitate the positioning of the first tie bars 4 and the second tie bars 5 when being welded with the upper ring 2 and the lower ring 3, as shown in fig. 4, notches 11 are formed on the outer circumferential surfaces of the upper ring 2 and the lower ring 3 at equal intervals. Specifically, the upper ring 2 and the lower ring 3 are used as positioning and welding bearing points of the upper end surface and the lower end surface of the cast iron pipe, the thickness of the upper ring 2 and the lower ring 3 is 50mm, the outer diameter of the upper ring is 60mm larger than the outer diameter of the cast iron pipe, and the inner diameter of the upper ring is 20mm smaller than the inner diameter of the cast iron pipe, so that the cast iron pipe can be stably placed on the lower ring 3 during hoisting. In this embodiment, the first tie bar 4 and the second tie bar 5 are both round steel, and the notch 11 is a semicircular notch, and the radius thereof is equal to the radius of the first tie bar 4 and the second tie bar 5.
As shown in fig. 2 and 3, the upper end surfaces of the first tie bar 4 and the second tie bar 5 are respectively flush with the upper end surface of the upper ring 2, the lower end surfaces of the first tie bar 4 and the second tie bar 5 are respectively flush with the lower end surface of the lower ring 3, and the length of the first tie bar 4 and the length of the second tie bar 5 is 10mm greater than the sum of the thickness of the upper ring 2 and the lower ring 3 and the length of the cast iron pipe. The 10mm is an estimated amount considering the elongation of the cast iron pipe after heating, and the total length of the whole tool is ensured to meet the allowable length of equipment heating.
In this embodiment, as shown in fig. 1 and 2, the first lacing wires 4 are 3 in number, and are equally divided into the upper ring 2 and the lower ring 3 together with the second lacing wires 5.
As shown in fig. 1 and 2, the lifting hook 1 is made of round steel and has an inverted V-shaped structure, and two ends of the lifting hook are respectively welded to the upper end surface of the upper ring 2. Through the lifting hook 1 of the V-shaped structure, the tool is more convenient to lift.
In this embodiment, the lifting hook 1, the upper ring 2, the lower ring 3, the first tie bar 4, the second tie bar 5 and the positioning block 6 are all made of stainless steel, and can be heated at a high temperature for a long time without deformation, so that the firmness of the tool is further improved.
The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.
Claims (10)
1. A heat treatment tool for a large-diameter wear-resistant cast iron pipe is characterized by comprising a lifting hook, an upper circular ring and a lower circular ring which are oppositely arranged and have the same size, wherein the lifting hook is connected with the upper end face of the upper circular ring; the upper end and the lower end of the first lacing wire are respectively welded with the upper ring and the lower ring to form a suspension cage with a gap; and after the cast iron pipe to be subjected to heat treatment is arranged in the suspension cage, the upper end and the lower end of the second lacing wire are respectively welded with the upper circular ring and the lower circular ring.
2. The large-caliber wear-resistant cast iron pipe heat treatment tool according to claim 1, wherein positioning blocks are welded to the upper ends and the lower ends of the first tie bars and the second tie bars respectively and used for positioning the cast iron pipe and bearing the gravity of the cast iron pipe during horizontal tempering, and the positioning blocks are located in the radial direction of the suspension cage and face the axial direction of the suspension cage.
3. The large-caliber wear-resistant cast iron pipe heat treatment tool according to claim 2, wherein a gap of 5-10 mm is formed between the positioning block and the outer side wall of the cast iron pipe.
4. The heat treatment tool for the large-caliber wear-resistant cast iron pipe as claimed in any one of claims 1 to 3, wherein notches are formed in the outer circumferential surfaces of the upper circular ring and the lower circular ring at equal intervals.
5. The heat treatment tool for the large-caliber wear-resistant cast iron pipe as claimed in claim 4, wherein the first tie bar and the second tie bar are both round steel, the notch is a semicircular notch, and the radius of the notch is equal to the radius of the first tie bar and the radius of the second tie bar.
6. The heat treatment tool for the large-caliber wear-resistant cast iron pipe as claimed in claim 4, wherein the outer diameter of the upper ring and the outer diameter of the lower ring are 60mm larger than the outer diameter of the cast iron pipe, and the inner diameter of the upper ring and the inner diameter of the lower ring is 20mm smaller than the inner diameter of the cast iron pipe.
7. The heat treatment tool for the large-caliber wear-resistant cast iron pipe as claimed in claim 5 or 6, wherein the upper end surfaces of the first tie bar and the second tie bar are respectively flush with the upper end surface of the upper ring, the lower end surfaces of the first tie bar and the second tie bar are respectively flush with the lower end surface of the lower ring, and the lengths of the first tie bar and the second tie bar are 10mm greater than the sum of the thicknesses of the upper ring and the lower ring and the length of the cast iron pipe.
8. The heat treatment tool for the large-caliber wear-resistant cast iron pipe as claimed in claim 7, wherein the number of the first tie bars is 3, and the first tie bars and the second tie bars are used for quartering the upper ring and the lower ring.
9. The heat treatment tool for the large-caliber wear-resistant cast iron pipe as claimed in claim 1, wherein the lifting hook is made of round steel and has an inverted V-shaped structure, and two ends of the lifting hook are respectively welded to the upper end face of the upper ring.
10. The heat treatment tool for the large-caliber wear-resistant cast iron pipe as claimed in claim 2 or 9, wherein the lifting hook, the upper ring, the lower ring, the first tie bar, the second tie bar and the positioning block are all made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021031992.1U CN212451512U (en) | 2020-06-08 | 2020-06-08 | Heat treatment tool for large-caliber wear-resistant cast iron pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021031992.1U CN212451512U (en) | 2020-06-08 | 2020-06-08 | Heat treatment tool for large-caliber wear-resistant cast iron pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212451512U true CN212451512U (en) | 2021-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021031992.1U Active CN212451512U (en) | 2020-06-08 | 2020-06-08 | Heat treatment tool for large-caliber wear-resistant cast iron pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212451512U (en) |
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2020
- 2020-06-08 CN CN202021031992.1U patent/CN212451512U/en active Active
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Address after: 610000 No. 939, Tianxing Avenue, Qingbaijiang District, Chengdu, Sichuan Patentee after: SICHUAN WEIZHEN HI-TECH MATERIAL CO.,LTD. Address before: 610300 China (Sichuan) pilot Free Trade Zone, Chengdu, Sichuan 1509 xiangdao Avenue, Qingbaijiang District, Chengdu (a0412-a0413, 4th floor, area a, Chengdu International Railway Port) Patentee before: SICHUAN WEIZHEN HI-TECH MATERIAL CO.,LTD. |