WO2012100414A1

WO2012100414A1 - Solid solution heat treatment surnace

Info

Publication number: WO2012100414A1
Application number: PCT/CN2011/070623
Authority: WO
Inventors: 杨三堂; 胡文超; 戴志刚; 张刚
Original assignee: 中冶京诚工程技术有限公司; 北京京诚凤凰工业炉工程技术有限公司
Priority date: 2011-01-26
Filing date: 2011-01-26
Publication date: 2012-08-02

Abstract

A solid solution heat treatment furnace comprises a roller hearth heat treatment furnace (G) and a quenching machine (6) which are connected mutually. The roller hearth heat treatment furnace (G) comprises a furnace main body (1) and multiple furnace roller devices (2), the furnace roller devices (2) are mounted between a furnace body feeding opening and a furnace body discharging opening in parallel. Each furnace roller device (2) comprises a water cold supporting shaft (21) and a roller body (22), the water cold supporting shaft (21) is provided with a cooling water passage (211), the roller body (22) comprises a axial through cavity, the water cold supporting shaft (21) penetrates the inner of roller body (22) through the cavity, a holding space (23) is formed between the outer wall of the water cold supporting shaft (21) and the inner wall of the roller body (22), multiple supporting assemblies (24) are alternately mounted in the holding space (23) in parallel along axial direction, a side of the supporting assembly (24) is connected with the outer wall of the water cold supporting shaft (21), a preset gap (25) is formed between the other side of the supporting assembly (24) and the inner wall of the roller body (22).

Description

Solution heat treatment furnace

Technical field

The present invention relates to a solution heat treatment furnace, and more particularly to a solution heat treatment furnace for a high temperature stainless steel and a heat resistant alloy steel which can be stably operated for a long period of time at a furnace temperature higher than 125 CTC. Background technique

The solution heat treatment furnace includes a roller bottom type heat treatment furnace and a quenching machine which are connected to each other. The roller-type heat treatment furnace is a process equipment commonly used in the industries of iron and steel metallurgy, non-ferrous metallurgy and machinery. In the production process of the roller-type heat treatment furnace, the furnace roller is placed inside the heating furnace, and the heated workpiece is placed on the furnace roller. According to the speed and temperature set by the relevant process, the workpiece is heated by the furnace roller while being conveyed in the heating furnace. The quenching machine is one of the important equipments in the heat treatment production line of stainless steel. Its function is to rapidly cool the high-temperature steel heated by the heating furnace by air cooling, water cooling or aerosol cooling to complete the stabilization process and reduce the alloy carbide. The precipitation improves the lattice structure of stainless steel and improves the quality of steel. After the workpiece such as steel is heated or solution treated in the roller-type heat treatment furnace, it is transported through the extremely short intermediate transition section and immediately enters the quenching machine for quenching to improve the hardness, strength and wear resistance of the workpiece to meet the use of the parts. performance.

Due to the high heat treatment temperature of the stainless steel rods and tubes, the conventional roller-type heat treatment furnace is limited by the heat-resistant temperature of the furnace rolls therein, and it is difficult to meet the production requirements. Therefore, the gap heat treatment such as the "chamber furnace" is commonly used. The method is to complete the heat treatment of the stainless steel rods and tubes, and the production efficiency is low and the energy consumption is high. With the gradual increase in the use of high-precision heat treatment products, the heated workpieces are more and more stainless steel, high-temperature corrosion-resistant steel plates, rods, tubes, etc., and the furnace temperature of the roller-type heat treatment furnace is often higher than 1200 °C, some The heat treatment of the workpiece even requires a heat treatment temperature of up to 1250 °C, which makes the furnace temperature of the heat treatment furnace up to 1270 °C.

At this temperature, if the furnace roll unit of the roller-type heat treatment furnace adopts a non-cooling furnace roll, the material of the roll body must have extremely high-temperature strength properties, and it is inevitable to use a heat-resistant steel having a very high Cr and Ni content. The currently used furnace roll devices are mainly classified into the following two types according to whether they have a cooling function:

1. No cooling furnace roller, its structure is simple and easy to install. However, since the furnace temperature is higher than 1200 °C, the material of the roller body without cooling furnace roller must have extremely high temperature strength performance, which is bound to be resistant to high Cr and Ni alloys. Hot steel, resulting in extremely high furnace costs, has greatly increased equipment costs.

2. Directly cooling the furnace roll device, because the cooling medium is in direct contact with the inner wall of the roll body, the surface temperature of the roll body is very low, the heat loss of the heat treatment furnace is large, the heat efficiency is low, and the energy waste is serious; and the heated workpiece is lowered. The quality of the heat treatment. At this temperature, the furnace roll sealing structure of the conventional roller-type heat treatment furnace can no longer meet the sealing insulation requirements at this high temperature, and the conventional quenching machine cannot meet the cooling requirements of the workpiece at this high temperature.

Therefore, it is necessary to provide a novel solution heat treatment furnace to overcome the above disadvantages. Summary of the invention

SUMMARY OF THE INVENTION An object of the present invention is to provide a solution heat treatment furnace which can be stably used for a long period of time at a furnace temperature higher than 1200 ° C, which satisfies the high heating quality requirements of a heated workpiece and can greatly reduce heat loss.

The above object of the present invention can be achieved by the following technical solutions:

A solution heat treatment furnace comprising a roller-type heat treatment furnace and a quenching machine connected to each other; the roller-type heat treatment furnace comprises: a furnace body, a furnace wall is arranged around the opposite sides of the furnace body Correspondingly, a furnace body inlet port and a furnace body discharge port are respectively arranged; a plurality of furnace roller devices are arranged in parallel between the furnace body inlet and the furnace body discharge port, and two of each furnace roller device The end is sealed and disposed in the furnace wall by a sealing module, each of the furnace roller devices comprises a water-cooled support shaft and a roller body, the water-cooled support shaft is provided with a cooling water passage, the roller body has an axially through cavity, and the water-cooled support shaft passes The cavity penetrates the inside of the roller body, and the roller body and the water-cooling support shaft are synchronously rotated; an accommodation space is formed between an outer wall of the water-cooled support shaft and an inner wall of the roller body. a plurality of support assemblies are disposed in the accommodating space in parallel and spaced apart in the axial direction, one side of the support assembly is connected to the outer wall of the water-cooled support shaft, and the other side is opposite to the inner wall of the roller body There is a predetermined gap between them.

The characteristics and advantages of the solution heat treatment furnace of the embodiment of the present invention include: a roller bottom type heat treatment furnace and a quenching machine, and both ends of the furnace roll device in the roller bottom type heat treatment furnace are disposed in the furnace wall of the heating furnace; the support assembly A predetermined gap is provided between the inner wall of the roller body; thus, the heat conduction amount of the support block is reduced, the heat loss of the heat treatment furnace is reduced, and the thermal efficiency of the heat treatment furnace device is ensured, so that the heat treatment can be performed at a furnace temperature higher than 1200 degrees Celsius. Long-term stable use, to meet the higher heating quality requirements of the heated workpiece, and can greatly reduce heat loss. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some of the present invention. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative work.

1 is a schematic structural view of a solution heat treatment furnace according to an embodiment of the present invention;

2 is a schematic enlarged cross-sectional view showing a roller bottom type heat treatment furnace of a solution heat treatment furnace according to an embodiment of the present invention; 3 is a schematic structural view of a roll device of a roll bottom type heat treatment furnace according to an embodiment of the present invention;

3A is a schematic cross-sectional structural view of A-A of FIG. 3;

3B is a schematic cross-sectional structural view of B-B of FIG. 3;

3C is a schematic cross-sectional view of the C-C of FIG. 3;

Figure 4 is an enlarged schematic view of a portion A of Figure 2;

5 is a schematic structural view of a quenching machine of a solution heat treatment furnace according to an embodiment of the present invention;

6 is a schematic cross-sectional view showing the structure of a quenching machine of a solution heat treatment furnace according to an embodiment of the present invention;

Figure 7 is a schematic cross-sectional view showing a quenching machine of a solution heat treatment furnace according to an embodiment of the present invention;

Fig. 7A is an enlarged schematic view of a portion A of Fig. 7. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Embodiment 1

Referring to FIG. 1 and FIG. 2, a solution heat treatment furnace according to an embodiment of the present invention includes a roller bottom type heat treatment furnace G and a quenching machine 6 which are connected to each other. The roller bottom type heat treatment furnace G includes a furnace body 1 and a plurality of furnace roll devices 2, and a furnace wall 11 is disposed around the furnace body 1, and furnace body feeds are respectively provided at opposite sides of the furnace body 1 Port and furnace body discharge port; a plurality of furnace roll devices 2 are disposed in parallel between the furnace body feed port and the furnace body discharge port, and both ends of each of the furnace roll devices 2 are sealed and disposed in the furnace through the sealing module 3 In the wall 11, each of the furnace roll devices 2 includes a water-cooled support shaft 21 and a roll body 22, and the water-cooled support shaft 21 is provided with a cooling water passage 211 such that cooling water flows through the cooling water passage 211 to cool the water-cooled support shaft 21. . The roller body 22 has a cavity that penetrates in the axial direction. The water-cooling support shaft 21 penetrates the inside of the roller body 22 through a cavity, and the roller body 22 and the water-cooling support shaft 21 are rotated in synchronization. An accommodating space 23 is formed between the outer wall of the water-cooling support shaft 21 and the inner wall of the roller body 22, and a plurality of support assemblies 24 are disposed in the accommodating space 23 in parallel and spaced apart in the axial direction, where the accommodating space is provided. Two support assemblies 24 are provided in the interior of the housing 23, but the present invention is not limited thereto. Depending on the actual size of the roller body 22, more support assemblies 24 may be provided in the housing space 23. One side of the support assembly 24 is connected to the outer wall of the water-cooled support shaft 21, and the other side thereof has a predetermined gap 25 between the inner wall of the roller body 22, and the gap value can be determined according to the weight of the workpiece to be heated, the roll body. The material and wall thickness of 22 are predetermined, as long as the support member 24 can be attached to the inner wall of the roll body 22 as long as the heated workpiece is pressed against the roll body 22. Touch, for example, the gap value is 5.

In the embodiment of the present invention, the water-cooled support shaft 21 penetrates the cavity, and the water-cooled support shaft 21 is fixedly connected to both ends of the roller body 22, and the water-cooled support shaft 21 functions to support the roller body 22. Further, the water-cooled support shaft 21 is driven to rotate by the external drive device to drive the roll body 22 to rotate synchronously, and the cooling water only cools the water-cooled support shaft 22, and does not cool the roll body 22. Thus, the roll unit 2 can be stably used for a long period of time at a furnace temperature higher than 1200 °C. Compared with the prior art in which the cooling medium is kept in contact with the roll body, the present invention only partially deforms the roll body 22 when the heated workpiece is pressed against the roll body 22, so that the partial support assembly 24 is in phase with the roll body 22. Contact, thus reducing the heat loss of the heat treatment furnace and improving the thermal efficiency.

The end of the roll body 22 is disposed in the furnace wall 11, thereby greatly reducing the amount of heat transfer of the roll body 22 and reducing heat loss.

Referring to FIG. 3B and FIG. 3C, as an alternative embodiment of the present invention, each support assembly 24 is composed of four support blocks 241 uniformly distributed on the same circumferential plane perpendicular to the axial direction of the water-cooled support shaft 21, each One side of the support block 241 is connected to the water-cooled support shaft 21, and the other side thereof has the aforementioned predetermined gap 25 between the inner wall of the roll body 22, thereby reducing heat transfer and reducing heat loss. Each of the support assemblies 24 of the present invention may also be composed of two, three, five or more support blocks 241 uniformly distributed in the circumferential direction as long as it can contact the inner wall of the roll body and reduce heat loss. Just fine.

Further, a slot 211 extending in the axial direction of the water-cooling support shaft 21 is provided on a side of the support block 241 connected to the water-cooling support shaft 21, thereby reducing the contact area between the support block 241 and the water-cooled support shaft 21, and increasing Thermal resistance.

Further, the support blocks of the two adjacent support members 24 are staggered with each other in the circumferential direction. As shown in FIGS. 3B and 3C, the support block 241 of each support assembly 24 and the support blocks 242 of the adjacent support assemblies 24 are staggered in the circumferential direction, thereby causing the cooling black marks on the surface of the roll body to be irregularly distributed, thereby improving The heating quality of the heated workpiece.

As an alternative embodiment of the present invention, please refer to FIG. 3A together, a support ring 26 is respectively fixed on both ends of the roller body 22, and the support ring 26 is coupled with the water-cooled support shaft 21 Therefore, the roller body 22 is fixedly connected to the water-cooling support shaft 21 through the support ring 26, which ensures that the roller body 22 rotates synchronously with the water-cooled support shaft 21, and the water-cooled support shaft 21 functions to support the roller body 22, thereby reducing The torque the roller body is subjected to. However, the present invention is not limited thereto, and the support ring 26 and the water-cooled support shaft 21 may also be pinned, snapped, or other known connection manner, as long as the support ring 26 is connected to the water-cooled support shaft 21, so that the roll body 22 and The water-cooled support shaft 21 rotates in synchronization, and the water-cooled support shaft 21 functions to support the roll body 22.

Further, a limit ring 27 is provided on both sides of the support ring 26 at one end of the roller body 22. As shown in FIG. 3, in the embodiment, the limit stop ring 27 is welded and fixed on the outer wall of the water-cooled support shaft 21, and the two limit stop rings are 27 are respectively disposed on both sides of the support ring 26, so that the 22-end of the roller body is matched with the limit ring 27 by the support ring 26 and the limit ring is located at a fixed position of the water-cooled support shaft 21. Therefore, one end of the roller body 22 can be fixedly fixed with the water-cooling support shaft 21, and the other end can be freely expanded and contracted, so that the roller body has a certain thermal expansion margin, thereby avoiding damage of the furnace roller device and improving the service life of the roller device. .

Further, as shown in FIG. 3A, grooves are circumferentially arranged on the outer ring side and the inner ring side of the support ring 26, respectively.

261, 262, and the inner ring side groove 262 and the outer ring side groove 261 are alternately arranged in the circumferential direction, that is, the inner ring side groove 262 and the outer ring side groove 261 are different. Layout in the radial direction. Thus, the contact area of the support ring 26 with the roll body 22 and the water-cooled support shaft 21 is reduced, the thermal resistance is increased, the heat loss of the heat treatment furnace is lowered, and the heat efficiency is improved.

Preferably, in the present embodiment, the groove 261 on the outer ring side of the support ring 26 has a trapezoidal cross section, and the groove 262 on the inner ring side has a semicircular cross section to facilitate the increase in thermal resistance and is suitable for processing. However, the present invention is not limited thereto, and the shapes of the grooves 261, 262 may be polygonal, zigzag or other suitable shapes as long as it is advantageous to increase the thermal resistance of the support ring and reduce the heat loss of the roll device.

As another alternative embodiment of the present invention, as shown in FIG. 3, the accommodating space 23 is filled with a heat insulating layer 28 formed of a heat insulating medium, thereby greatly reducing the heat conduction amount of the roll body and reducing The heat loss; at the same time, the surface temperature of the roll body 22 is increased. Wherein, the heat insulating medium may be a heat insulating material such as ceramic fiber, silica fiber or glass fiber. The other parts of the embodiment are the same as those of the above embodiment, and the description thereof will not be repeated here.

In the present invention, the material of the water-cooled support shaft may be carbon structural steel, and the material of the roller body may be heat-resistant cast steel. Compared with the prior art heat resistant steel using a high Cr, Ni content alloy, the present invention greatly reduces the manufacturing cost.

Accordingly, the furnace roll apparatus of the present invention utilizes the principle of heat transfer, in use, a heated workpiece (not shown) is pressed against the roll body 22 such that the inner wall of the roll body 22 is in contact with the support block of the support assembly 24, the roll body A very small portion of the heat of 22 is transferred to the water-cooled support shaft 21 through the support block. To further avoid the large heat loss of the roller-type heat treatment furnace G, both ends of the roller body 22 are disposed in the furnace wall 11 of the heating furnace; the support assembly 24 A predetermined gap 25 is defined between the inner wall of the roller body 22 and a slot extending in the axial direction of the water-cooling support shaft on a side of the support block that is connected to the water-cooled support shaft. This increases the thermal resistance, reduces the amount of heat conduction of the roller body 22, and maintains the roller body 22 at a relatively high temperature, thereby reducing the large heat loss of the heat treatment furnace, improving the thermal efficiency, and saving energy, and the furnace roll device can Long-term stable use under furnace conditions above 1200 °C. Further, the roller body 22 is fixed to the water-cooling support shaft 21 by the key 29, the limit ring 27 and the support ring 26, and rotates with the water-cooling support shaft 21, and in use, the mechanical load from the heated workpiece is carried by the water-cooled support shaft 21. The water-cooled support shaft 21 functions to support the roll body 22, and the heat-resistant steel roll body placed in the furnace is mainly used to bear the heat load of the high-temperature furnace gas. In addition, referring to FIG. 1, a sealing curtain 4 and/or a furnace door 5 may be respectively disposed at the furnace body inlet and the furnace body discharge port of the roller-type heat treatment furnace G. The sealing curtain 4 can be used for preventing the overflow of the furnace gas at the door of the roller-type heat treatment furnace G, and effectively reducing the cold air suction. The sealing curtain of the patent number CN200720126507. 7 can be used; the furnace door 5 can be used in the field. A suitable furnace door is well known.

The roller bottom type heat treatment furnace of the embodiment of the present invention can adopt a pulse control method to meet the furnace temperature control requirements under various loads. Embodiment 2

Referring to Figures 2 and 4, an embodiment of the invention relates to a sealing module 3.

The sealing module 3 includes a sealing brick 31 having a through hole 311 in which a plurality of fiber modules 32 are disposed in the axial direction, and an end portion of the furnace roll device 2 is bored therein. In the multi-layer fiber module 32, a fiber blanket 33 is disposed at one end of the end of the furnace roll device 2, and the fiber blanket 33 is sealingly disposed on the sealing brick 31 and the furnace roll. Between the ends of the device.

Specifically, the inner opening of the sealing brick 31 has a cylindrical shape, and is fixedly disposed in the furnace wall 11 of the roller-type heat treatment furnace G. The through hole 311 is opened at the center of the sealing brick 31, and the end of the furnace roll device 2 penetrates from the fire surface of the furnace wall 11 into the through hole 311 of the sealing brick 31 and passes through the sealing brick 31 from the back surface of the furnace wall. The sealing brick 31 can support the furnace wall well, avoiding the rotation radius of the end portion of the furnace roller device being enlarged due to the bending of the furnace roller device 2, resulting in the roller path or the workpiece scraping at the end of the furnace roller device 2. The furnace wall causes damage to the furnace wall.

The through hole 311 has a stepped shape, and the diameter of the through hole 311 on the side of the fire surface of the furnace wall is smaller than the diameter of the through hole 311 on the side of the back surface of the furnace wall. The multi-layer fiber module 32 is disposed in the through hole 311 having a large aperture, such that the side of the multi-layer fiber module 32 is close to the stepped inner side wall of the through hole 311 on the side close to the fire surface of the furnace wall, and the furnace roll device end There is a certain gap between the portion and the through hole 311 having a small diameter of the sealing brick 31, so that the end portion of the roller device does not contact the fire-facing surface of the sealing brick 31 during the rotating operation, and the furnace is prevented. The end of the roller unit is damaged.

The fiber blanket 33 is stuffed at the backfire port of the sealing brick 31 for sealing the fiber module 32 and the end of the furnace roll device on the back surface of the furnace wall.

In the roller bottom furnace roller sealing structure of the present invention, the end portion of the furnace roll device 2 is sleeved by the fiber module 32 and disposed in the through hole 311 of the sealing brick 31, and the fiber module 32 and the inner side wall of the sealing brick 31 through the hole 311, The outer peripheral wall of the end of the furnace roll device is sealed, which can effectively prevent the leakage of the furnace gas, dissipate the furnace temperature, and reduce the heat consumption; and the multi-layer fiber module is also used between the end of the furnace roll device and the sealing brick 31. 32 superimposed structural form, multi-layer fiber module of the superposed structure 32 The barrier distance is increased, and the layer leakage blocks the possible leakage of the furnace gas and the furnace temperature, so that the sealing structure of the invention has higher sealing performance, can more effectively block the radiant heat, and prevent the furnace gas from overflowing; in addition, the furnace wall back The fire surface is sealed with a fiber blanket 33. The fiber blanket 33 can be a zirconium-containing fiber blanket, which has excellent heat insulation effect and is resistant to thermal shock, can effectively prevent furnace gas from overflowing, and has low bulk density and low heat capacity. The temperature rise time of the end of the furnace roll device can be greatly shortened, and the effect of lowering the temperature of the end portion of the roll device can be achieved.

As an optional embodiment of the present invention, the multi-layer fiber module 32 is provided with an opening 321 , and an end portion of the roller device is disposed in the opening 321 , and an inner sidewall of the opening 321 Cooperating with the outer contour of the end of the furnace roll unit. Specifically, the end portion of the furnace roll device of the present invention has a stepped shaft shape, and the opening 321 of the multilayer fiber module 32 which is sleeved at the end of the roll device is also stepped open, and the outer peripheral wall of the end portion of the roll device The inner side wall of the multi-layer fiber module 32 is tightly matched to seal the end of the roll unit and the multi-layer fiber module 32, thereby achieving a good sealing effect, preventing leakage of the furnace gas, dissipating the furnace temperature, and low heat loss. In another embodiment, the multilayer fiber module 32 can also be adapted according to the shape of the end of the roll device, for example, the end of the roll device is conical, then the multilayer fiber module 32 is opened. The hole 321 is also designed to have a conical opening shape as long as the inner side wall of the opening 321 of the multilayer fiber module 32 can be closely fitted to the outer peripheral wall of the end portion of the furnace roll. In addition, the number of layers of the multilayer fiber module 32 can also be selected according to actual conditions, and is not limited herein. In the present embodiment, a three-layer fiber module 32 is provided in the through hole 311 in the axial direction.

Additionally, the fiber blanket 33 may be provided between the fiber modules 32 of each layer. In the present embodiment, two layers of fiber blankets 33 are interposed between the three-layer fiber modules 32. The fiber blanket 33 can provide a better sealing effect for the multilayer fiber module 32.

As an alternative embodiment of the present invention, the fiber module 32 may be a flexible fiber module. The fiber module 32 using the material can reduce the friction between the roller path at the end of the furnace roll and the refractory material, and effectively reduce the running resistance of the furnace roll. The sealing brick 31 can be a heavy roll neck made of castable. The castable contains refractory material, so the seal brick 31 has excellent high temperature resistance and can be stably operated continuously for a long time at a furnace temperature higher than 1200 ° C (up to 1280 ° C).

Other structures, working principles, and advantageous effects of the present embodiment are the same as those of Embodiment 1, and are not described herein again. Embodiment 3

Referring to Figures 5 to 7A, the quenching machine 6 of the embodiment of the present invention is an at least two-stage quenching machine, such as a two-stage quenching machine or a three-stage quenching machine. specifically is:

Referring to FIG. 6 and FIG. 7, the quenching machine of the embodiment of the present invention includes a casing 61. The two sides of the casing are respectively provided with an inlet port and a discharge port, and between the inlet port and the discharge port. A plurality of parallel quenching rollers 62 are disposed, and the two shaft ends of each quenching roller 62 are respectively connected to the casing 61, and the casing 61 has at least two along the direction of the arrangement of the roller lanes. The cooling section, the first cooling section L1 is a water-cooled and air-cooled cooling section, the second cooling section L2 is a water-cooled cooling section, the bottom of the casing 61 is provided with a drainage system 63, and the drainage system 63 is located below the rollerway 1.

Applicable to stainless steel or heat-resistant alloy steel pipe or steel plate from the furnace feed inlet into the roller-type heat treatment furnace, after high-temperature heating or solution treatment in the furnace (steel temperature 1280 ° C) from the furnace discharge port The output, which is transported through the extremely short intermediate transition section, immediately enters the quenching machine from the inlet of the quenching machine, and the steel pipe is conveyed in the quenching machine through the quenching roller 62, during which at least the first cooling section and the second pass The cooling section is rapidly cooled, and the steel pipe which is cooled by cooling (the temperature is lowered to 200 ° C or lower) is sent out from the discharge port; wherein water which is water-cooled on the surface of the steel pipe flows out from the drainage system 63.

In the embodiment of the present invention, the steel pipe passes through at least two cooling sections, the first cooling section is a water-cooled and air-cooled cooling section, and the second cooling section is a water-cooled cooling section, that is, when the steel pipe just enters the quenching machine, the temperature is the highest. In the first cooling section, the surface of the steel pipe is cooled by air cooling and water cooling. The cooling strength at this time is large, so that the temperature of the steel pipe is cooled most rapidly, and the high temperature steel pipe is required to obtain quenching in the first cooling section L1. The higher cooling rate; when entering the second cooling section during the continuous transportation in the quenching machine, only the surface of the steel pipe which has been subjected to the first cooling process is quenched and cooled by the water cooling method, and the cooling intensity is small. The cooling rate is low. Further, in this embodiment, various cooling methods such as air cooling and water cooling are used to uniformly cool the surface of the steel pipe, the cooling rate is fast, and the cooling rate is high, so that the steel pipe has small bending deformation and excellent quenching effect. In other words, the embodiment of the present invention can quench a high temperature steel pipe having a temperature of 1,280 ° C which is discharged from the heat treatment furnace.

Among them, the drainage system 63 includes a plurality of conical water passages 631, and the bottom of the sewer passage has a drain port 632. The water cooled from the surface of the steel pipe can be completely discharged from the drain port 632 via the drain passage 631, and the water discharged from the drain system 63 can be recovered and reused.

The quenching roller table 62 can be driven by a single motor chain, which has a simple transmission mode, stable transmission and low failure rate. As an optional embodiment of the present invention, the casing 61 is provided with a plurality of mutually corresponding upper wind boxes 64 and lower wind boxes 65 at its first cooling section L1. The upper wind box 64 is located above the quenching roller path 62, and the lower wind box 65 is located below the quenching roller table 62. A first upper water cooling system is disposed between each of the upper wind boxes 64, and a first lower water cooling system is disposed between each of the lower air boxes 65. Here, there are two upper and lower bellows 64, 65, a first upper and lower water cooling system.

When the steel pipe passes through the first cooling section L1 on the quenching roller chute 62, the upper and lower bellows 64, 65 are sprayed and cooled against the surface of the steel pipe at the upper and lower positions, and the first upper and lower water cooling systems are opposed to each other in the upper and lower positions. The surface of the steel pipe is cooled by water cooling, that is, the surface of the steel pipe is cooled by the upper and lower directions, so that the surface of the steel pipe is cooled more effectively and more rapidly.

Further, the first upper and lower water cooling systems each include a plurality of first cooling water pipes 66 that are parallel to each other and communicate with each other, and the axial direction of each of the first cooling water pipes 66 is parallel to the axial direction of the quenching roller path 62. a cooling water pipe A plurality of nozzles (not shown) are provided on one side of the quenching roller path 62, that is, a nozzle is provided at the bottom of the upper first cooling water pipe 66, and a nozzle is provided at the top of the lower first cooling water pipe 66. So that the water in the first cooling water pipe 66 is directly sprayed on the surface of the steel pipe.

A plurality of nozzles may be evenly arranged along the axial direction of the first cooling water pipe 66 to uniformly spray the surface of the steel pipe to uniformly cool the surface of the steel pipe. Since the first cooling water pipe 66 is provided with a plurality of nozzles, the water from the first cooling water pipe 66 can be sprayed by a knife or a cone by means of a nozzle, and sprayed on the surface of the steel pipe with a large area to ensure the water volume. The distribution is uniform, so that the surface of the steel pipe can be further cooled sufficiently and uniformly, and the cooling rate is kept consistent.

Among them, the cooling capacity adjustment range of the first cooling section L1 is large, and the high cooling rate required for quenching of the high temperature steel pipe in the first cooling section L1 can be ensured. In addition, the embodiment can be applied to steel pipes of various specifications and diameters, and can treat high-temperature heat-treated steel pipes for a long time, and the work is stable, energy-saving and efficiency-enhancing. Of course, the quenching machine can also cool other steel materials other than steel pipes, such as steel plates.

As an alternative embodiment of the present invention, the casing 61 is provided with a second water cooling system at a position above and below the second cooling section L2 corresponding to the quenching roller path 62. Further, the second water cooling system includes a plurality of second cooling water pipes 67 that are parallel to each other and communicate with each other, and the axial direction of each of the second cooling water pipes 67 is parallel to the axial direction of the quenching roller path 62, and the second cooling water pipe 67 is above. A plurality of nozzles (not shown) are provided on one side of the quenching roller path 62. That is, a nozzle is provided at the bottom of the upper second cooling water pipe 67, and a nozzle is provided at the top of the lower second cooling water pipe 67 so that the water in the second cooling water pipe 67 is directly sprayed on the surface of the steel pipe.

Wherein, the water spray amount of the second cooling water pipe 67 can also be controlled and adjusted according to requirements, so that the cooling water amount can be opened and closed and the water quantity can be automatically adjusted in the second cooling section L2, and the cooling capacity adjustment range is compared with the first cooling section. L1 is smaller.

As an optional embodiment of the present invention, the casing 61 may be provided with a third cooling section L3 behind the second cooling section L2 (ie, in a direction close to the discharge port), and the third cooling section L3 is Water cooled cooling section. The third cooling section L3 is added in order to prevent the steel pipe from being unable to reach the lower temperature required for the steel pipe under the cooling action of the first and second cooling sections L1, L2, and mainly serves to cool the surface of the steel pipe.

Further, the third cooling section L3 is respectively provided with a third water cooling system corresponding to the upper and lower positions of the quenching roller path 62, and the third water cooling system each includes a plurality of third cooling water pipes which are parallel to each other and communicate with each other. 68. The axial direction of each of the third cooling water pipes 68 is parallel to the axial direction of the quenching roller path 62, and the third cooling water pipe 68 is provided with a plurality of nozzles on one side of the quenching roller path 62. That is, a nozzle is provided at the bottom of the upper third cooling water pipe 68, and a nozzle is provided at the top of the lower third cooling water pipe 68 so that the water in the third cooling water pipe 68 is directly sprayed on the surface of the steel pipe.

Wherein, the cooling water adjustment of the third cooling section L3 and the cooling capacity of the first cooling section L1 and the second cooling section L2 The adjustments are independent of each other, which makes it easier to control the degree of cooling of each cooling section. Specifically, the amount of air blown by the upper and lower wind boxes 64 and 65 can be controlled and adjusted as needed, and the water spray amounts of the first, second, and third cooling water pipes 66, 67, and 68 can be separately adjusted and adjusted as needed, for example, The water inlet pipes of the cooling water pipes 66, 67, 68 are equipped with automatic regulating valves to realize automatic opening and closing control and flow regulation of the cooling water, and the amount of water can be adjusted manually by manual control; or, so that the cooling water pipes 66 The nozzles of 67, 68 are respectively provided with water-cooling nozzles of different flow rates, for example, the flow rates of the nozzles of the first, second and third cooling water pipes 66, 67, 68 are sequentially decreased. In general, the second cooling section L2 and the third cooling section L3 may have their nozzles as a small-flow water-cooling nozzle to cool the steel pipe to a temperature below 200 ° C according to a cooling curve.

In addition, the upper and lower bellows 64, 65 and the respective cooling water pipes 66, 67, 68 can be connected to the casing 61, and both of them can be disassembled and replaced online, and the maintenance is convenient.

Referring to FIG. 3, according to an embodiment of the present invention, a seal member 7 is disposed between the shaft end portion of each quenching roller path 62 and the casing 61. The sealing member 7 includes a bottom plate 71, and one side of the bottom plate 71 is provided Hollow cone 72. A seal ring 73 is disposed at the end of the shaft of the quenching roller path 62, and the seal ring 73 is located in the tapered body 72. Due to the arrangement of the sealing member 7, the sealing structure of the quenching roller path 62 is optimized, the cooling water leakage can be effectively prevented, and the structure is simple; further, the quenching roller path 62 is easily removed from the casing 61, and the quenching roller path 62 is easily replaced, and maintenance is performed. low cost.

Further, at the time of assembly, the bottom plate 71 abuts against the casing 61, and the lower edge of the venting cover 83 fits over the edge above the bottom plate 71, and then the casing 61, the bottom plate 71 and the exhaust hood are screwed. 83 is joined together; the upper edge of the lower water passage 631 is fitted to the edge below the bottom plate 71, and then the casing 61, the bottom plate 71 and the lower water passage 631 are joined together by screws. In this way, a relatively sealed space is formed in the quenching machine, which can effectively prevent leakage of the cooling water.

As an alternative embodiment of the present invention, the top of the casing 61 is provided with a mist exhaust system 8. The mist exhausting system 8 includes a mist exhausting fan 81, a mist exhausting passage 82 and a venting hood 83. The venting hood 83 is directly disposed at the top of the casing 61, above the cooling water pipes, and the venting passage 82 communicates with the venting hood 83. The mist exhaust fan 81 is connected to one end of the exhaust mist passage 82. Under the action of the exhaust fan 81, the aerosol generated during the cooling of the steel tube in the quenching machine is guided by the exhaust hood 83 and discharged from the exhaust passage 82 to improve the working environment and improve the service life of the equipment. In this embodiment, the exhaust mist system 8 adopts an independent exhaust fan 81, which makes the fogging effect good and the control means flexible. In other words, the quenching machine uses a separate exhaust system 8 and a drainage system 63, which can be equipped with an automatic control system, and is equipped with multiple points to monitor and record the return water temperature of the quenching machine in real time, and establish a database to facilitate optimal control.

The casing 61 is provided with a quench seal curtain 9 at its inlet. Quenching and sealing curtain 9 The structure is light, simple and practical, which can effectively prevent moisture overflow during quenching and avoid affecting the working and life of related equipment.

A plurality of observation holes may be disposed on the casing 61 to realize real-time observation of the condition of the steel pipe in the quenching machine, so as to effectively prevent the leakage of the cooling water when it is closed. The embodiment of the invention can also cooperate with the first-level and second-level proprietary control systems, adopts the control process, performs real-time control on the quenching machine, and establishes a database to optimize the flow control level in a targeted manner.

Other configurations, working principles, and advantageous effects of the present embodiment are the same as those of Embodiment 1 and/or Embodiment 2, and are not described herein again.

The above is only a few embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention without departing from the spirit and scope of the invention.

Claims

Claim

A solution heat treatment furnace comprising a roller-bottom heat treatment furnace and a quenching machine connected to each other; wherein the roller-type heat treatment furnace comprises:

a furnace body, a furnace wall is arranged around the furnace body, and a furnace body inlet port and a furnace body discharge port are respectively arranged at opposite sides of the furnace body;

a plurality of furnace roll devices are disposed in parallel between the furnace body feed opening and the furnace body discharge port, and both ends of each of the furnace roll devices are sealed and disposed in the furnace wall by a sealing module, and each of the furnace roll devices comprises a water-cooled support shaft and a roller body, the water-cooled support shaft is provided with a cooling water passage, the roller body has an axially penetrating cavity, and the water-cooled support shaft penetrates the inside of the roller body through the cavity, and the roller The water cooling support shaft is disposed in synchronization with the water cooling support shaft; an accommodating space is formed between the outer wall of the water cooling support shaft and the inner wall of the roller body, and the plurality of axially parallel and spaced spaces are disposed in the accommodating space. A support assembly, one side of the support assembly being coupled to the outer wall of the water-cooled support shaft and having a predetermined gap between the other side and the inner wall of the roll body.

2. The solution heat treatment furnace according to claim 1, wherein each of said support members is composed of at least two support blocks uniformly distributed on a same circumferential plane perpendicular to the axial direction of the water-cooled support shaft, said support One side of the block is connected to the water-cooled support shaft, and the other side has the predetermined gap between the inner wall of the roll body.

The solution heat treatment furnace according to claim 2, wherein a groove penetrating in the axial direction of the water-cooling support shaft is formed on a side of the support block that is connected to the water-cooling support shaft.

The solution heat treatment furnace according to claim 3, wherein the support blocks of the two adjacent support members are staggered with each other in the circumferential direction.

The solution heat treatment furnace according to claim 1, wherein a support ring is respectively fixed to both end portions of the roll body, and the support ring is coupled to the water-cooled support shaft.

The solution heat treatment furnace according to claim 5, wherein a stopper ring is provided on both sides of the support ring at one end of the roller body.

The solution heat treatment furnace according to claim 5, wherein grooves are circumferentially arranged on the inner ring side and the outer ring side of the support ring, and the inner ring side groove and the outer ring side The grooves on the ring side are staggered in the circumferential direction.

The solution heat treatment furnace according to claim 1, wherein a heat insulating layer formed of a heat insulating medium is provided in the accommodating space, and the heat insulating medium is ceramic fiber or silica fiber. Or fiberglass.

9. The solution heat treatment furnace according to claim 1, wherein the material of the water-cooled support shaft is carbon The structural steel, the material of the roller body is heat-resistant cast steel.

The solution heat treatment furnace according to claim 1, wherein both ends of the roll body are disposed in the furnace wall.

The solution heat treatment furnace according to any one of claims 1 to 10, wherein the sealing module comprises a sealing brick, the sealing brick is disposed in the furnace wall, and the inside of the sealing brick has a through hole in which a plurality of fiber modules are disposed in the axial direction, and an end portion of the furnace roll device is bored in the multilayer fiber module and is pierced at an end of the furnace roll device One end of the sealing brick is provided with a fiber blanket, and the fiber blanket is sealed between the sealing brick and the end of the furnace roll device.

The solution heat treatment furnace according to claim 11, wherein the multilayer fiber module is provided with an opening, and an end portion of the furnace roll device is disposed in the opening, the opening The inner side wall cooperates with the outer contour of the end of the furnace roll unit.

The solution heat treatment furnace according to claim 12, wherein the fiber blanket is provided between the fiber modules of the respective layers.

The solution heat treatment furnace according to claim 12, wherein the fiber module is a soft fiber module, and the sealing brick is a heavy roll neck brick made of a castable.

The solution heat treatment furnace according to claim 11, wherein a sealing curtain and/or a furnace door are respectively disposed at the furnace body inlet and the furnace body discharge port of the roller hearth heat treatment furnace.

The solution heat treatment furnace according to any one of claims 1 to 10, wherein the quenching machine comprises a casing, and two sides of the casing are respectively provided with a feeding port and a discharging port, respectively. A plurality of parallel quenching roller paths are disposed between the material inlet and the discharge port, and the two axial ends of each of the quenching roller channels are respectively connected to the casing, and the casing has at least along the direction of the arrangement of the quenching roller channels. The two cooling sections, the first cooling section is a water-cooled and air-cooled cooling section, the second cooling section is a water-cooled cooling section; the bottom of the casing is provided with a drainage system, and the drainage system is located below the quenching roller path.

The solution heat treatment furnace according to claim 16, wherein the casing is provided with a plurality of mutually corresponding upper and lower wind boxes in the first cooling section, and the upper wind box is located above the quenching roller path. The lower air box is located below the quenching roller path, and a first upper water cooling system is arranged between each upper air box, and a first lower water cooling system is arranged between each lower air box.

18. The solution heat treatment furnace according to claim 17, wherein the first upper and lower water cooling systems each comprise a plurality of first cooling water pipes that are parallel to each other and communicate with each other, and an axis of each of the first cooling water pipes. The direction is parallel to the axial direction of the quenching roller path, and a plurality of nozzles are provided on one side of the first cooling water pipe to the side of the quenching roller.

The solution heat treatment furnace according to claim 17, wherein the casing is provided with a second water cooling system at a position corresponding to the second cooling section corresponding to the upper and lower sides of the quenching roller path.

The solution heat treatment furnace according to claim 19, wherein the second water cooling system comprises a plurality of second cooling water pipes parallel to each other and communicating with each other, an axial direction of each of the second cooling water pipes and the The axial direction of the quenching roller path is parallel, and a plurality of nozzles are provided on one side of the second cooling water pipe to the quenching roller path.

The solution heat treatment furnace according to claim 16, wherein the casing is further provided with a third cooling section behind the second cooling section, and the third cooling section is a water-cooled cooling section.

The solution heat treatment furnace according to claim 21, wherein the third cooling section is respectively provided with a third water cooling system corresponding to the upper and lower positions of the quenching roller path, and the third water cooling system Each includes a plurality of third cooling water pipes that are parallel to each other and communicate with each other. The axial direction of each of the third cooling water pipes is parallel to the axial direction of the quenching roller path, and the third cooling water pipe is provided on one side of the quenching roller path. Multiple nozzles.

The solution heat treatment furnace according to claim 16, wherein a sealing member is disposed between the shaft end of each quenching roller path and the casing, the sealing member comprises a bottom plate, and one side of the bottom plate is provided with a hollow Conical body; a sealing ring is arranged at the end of the shaft of the quenching roller, and the sealing ring is located in the conical body.

The solution heat treatment furnace according to claim 16, wherein the top of the casing is provided with a mist discharge system, and the mist discharge system comprises a mist exhaust fan, a mist exhaust passage and a mist exhaust cover, and the mist cover is arranged. At the top of the casing, the exhaust mist passage is connected to the exhaust mist cover, and the exhaust mist fan is connected to one end of the exhaust mist passage.

The solution heat treatment furnace according to claim 16, wherein the casing is provided with a quenching sealing curtain at a feed opening thereof; the drainage system comprises a plurality of conical water passages, and a sewage passage The bottom has a drain.