阅读说明：本技术 一种水平筒形炉 (Horizontal cylindrical furnace ) 是由 刘宁 刘永军 于 2020-07-23 设计创作，主要内容包括：本发明涉及一种水平筒形炉,筒形炉包括横卧设置的炉体、设于炉体内部且能够容置卷材的内罩体、能够对内罩体和卷材进行支撑的支撑机构、为内罩体腔内气氛加热提供热量的加热器、均热系统、冷却系统、抽真空装置、充氮装置,炉体包括炉身、固定封挡在炉身长度方向一端的封板、封挡在炉身长度方向另一端且与炉身可分离的炉门；本发明的水平筒形炉通过极佳的气密性结构设计,使得其能够对易氧化、脱碳、渗碳的金属进行热处理,解决了现有技术中对气密性要求极高的金属在热处理时,箱式炉无法满足气密性要求的问题,也提高了本发明筒形炉的适用范围。(The invention relates to a horizontal cylindrical furnace, which comprises a horizontally arranged furnace body, an inner cover body which is arranged in the furnace body and can contain coiled materials, a supporting mechanism which can support the inner cover body and the coiled materials, a heater which can heat the atmosphere in the cavity of the inner cover body to provide heat, a soaking system, a cooling system, a vacuumizing device and a nitrogen charging device, wherein the furnace body comprises a furnace body, a sealing plate fixedly sealed at one end of the furnace body in the length direction, and a furnace door sealed at the other end of the furnace body in the length direction and separable from the furnace body; the horizontal cylindrical furnace can carry out heat treatment on the metal which is easy to oxidize, decarbonize and carburize through the excellent air tightness structural design, solves the problem that a box-type furnace cannot meet the air tightness requirement when the metal with the extremely high air tightness requirement is subjected to heat treatment in the prior art, and also improves the application range of the cylindrical furnace.)

1. A horizontal cylindrical furnace is characterized in that: the cylindrical furnace comprises a furnace body arranged horizontally, an inner cover body arranged in the furnace body and capable of containing coiled materials, a supporting mechanism capable of supporting the inner cover body and the coiled materials, a heater for heating the inner atmosphere in the inner cover body cavity to provide heat, a soaking system for uniformly distributing the inner atmosphere in the inner cover body cavity, a cooling system for cooling the inner atmosphere in the inner cover body cavity, a vacuumizing device for vacuumizing the inner cover body and the cooling system, and a nitrogen filling device for filling nitrogen into the inner cover body cavity, the furnace body comprises a furnace body, a sealing plate fixedly blocked at one end of the furnace body in the length direction, and a furnace door blocked at the other end of the furnace body in the length direction and separated from the furnace body, one end of the inner cover body in the length direction is fixed with the sealing plate, and the other end of the inner cover body in the length direction can be sealed with the furnace door.

2. The horizontal cylindrical furnace of claim 1, wherein: the furnace body is cylindrical, and the inner cover body is cylindrical.

3. The horizontal cylindrical furnace of claim 1, wherein: the whole or part of the inner cover body extends in a corrugated shape in the length direction.

4. The horizontal cylindrical furnace of claim 2, wherein: the heater is arranged on the inner circumferential surface of the furnace body, and the soaking system is used for uniformly transferring the heat transferred to the inner cover body from the heater to the coiled material.

5. The horizontal cylindrical furnace of claim 4, wherein: the soaking system comprises a guide cylinder arranged in the cavity of the inner cover body, the guide cylinder is provided with an air inlet and an air outlet which are positioned at two axially corresponding ends of the guide cylinder, a guide heating channel is formed between the guide cylinder and the inner cover body, and the coiled material is positioned in the guide cylinder and positioned between the air inlet and the air outlet; the soaking system also comprises a circulating fan which is used for enabling the gas in the guide shell and the guide heating channel to circularly flow.

6. The horizontal cylindrical furnace of claim 5, wherein: the circulating fan is arranged outside the guide shell, and an air outlet of the guide shell corresponds to a suction inlet of the circulating fan.

7. The horizontal cylindrical furnace of claim 6, wherein: the air outlet of the guide shell is located in the radial middle of the guide shell, and the air outlet of the guide shell corresponds to the radial middle of the coiled material.

8. The horizontal cylindrical furnace of claim 1, wherein: the cooling system comprises a heat exchanger, a flow guide fan and valves, wherein the heat exchanger is communicated with the inner cavity of the inner cover body through an air inlet pipe and an air outlet pipe, and the valves are arranged on the air inlet pipe and the air outlet pipe.

9. The horizontal cylindrical furnace of claim 1, wherein: the support mechanism comprises a support assembly fixedly butted with the furnace body and a sliding frame arranged in a sliding manner relative to the support assembly along the length direction of the furnace body, one end of the sliding frame is fixedly connected with the furnace door, and the coiled material is supported on the sliding frame; the sliding frame is provided with a first station and a second station, when the sliding frame is positioned at the first station, the furnace door is far away from the furnace body along the length direction of the furnace body, and coiled materials can be placed on the sliding frame; when the sliding frame is located at the second station, the furnace door and the furnace body are close, the sliding frame and the upper coiled material of the sliding frame are located in the inner cover body cavity, the inner cover body cavity is sealed, and the coiled material can be subjected to heat treatment operation.

10. The horizontal cylindrical furnace of claim 9, wherein: the support assembly comprises support rails which are positioned at two transverse sides in the cavity of the inner cover and extend along the length direction of the furnace body, and support columns which are fixedly connected with the furnace body and provide support for the support rails; the sliding frame comprises an underframe with pulleys rotatably arranged at the bottom and vertical blocks sequentially arranged on the underframe in the length direction of the furnace body, one end part of the underframe is fixedly connected with the furnace door, and the coiled materials are overlapped on the vertical blocks at two sides through a cross beam; the cylindrical furnace further comprises a trolley for driving the furnace door to move so as to drive the sliding frame to move.

Technical Field

The invention relates to the field of industrial heat treatment, in particular to a horizontal cylindrical furnace.

Background

The prior high-end metal coil material is mostly treated by a bell-type furnace or a box-type furnace containing protective atmosphere. Although the bell type furnace has good sealing performance, the operation process of charging and discharging is complicated. Although the operation of loading and unloading is relatively simple, the sealing performance of the box-type furnace is not good than that of a bell-type furnace, and the structure is not compact; when the bell-type furnace is used for annealing coil stock, because the incoming material (coil stock) is vertically placed, in order to adapt to the circular space structure and flow field distribution of the inner cover, the coil stock needs to be placed on a turning machine firstly before loading, the coil stock is turned to be in a horizontal state, and then the coil stock is placed into the bell-type furnace. In the charging process, the heating cover is also required to be lifted, and in addition, another cooling cover is required to be taken for use when furnace burden is cooled; the whole heat treatment process of the bell-type furnace frequently needs manual operation, the process is complex, and the automation level is low. When the box furnace is used for heat treatment, although the rolling is not needed, the heating cover and the cooling cover are not needed to be hoisted. However, the cubic structure of the box-type furnace has the defects of great space waste when cylindrical material coils are loaded, great air tightness, great energy consumption and protective gas consumption of the box-type furnace, and high heat treatment cost; and for the metals which are easy to oxidize, decarbonize and carburize during heat treatment (such as copper and copper alloy with higher air tightness requirement), the box-type furnace can not meet the extremely high requirement on the air tightness in the heat treatment process, so that the application range of the furnace is narrower.

Disclosure of Invention

The invention aims to solve the technical problem of overcoming the defects of the prior art and provides a horizontal cylindrical furnace.

In order to solve the technical problems, the invention adopts the technical scheme that:

the utility model provides a horizontal cylindrical furnace, cylindrical furnace includes the furnace body that the decurrent set up, locate the furnace body inside and can the holding coiled material the inner cover body, can support the supporting mechanism that inner cover body and coiled material supported, the heater that provides heat for the heating of the interior atmosphere of inner cover body cavity, a soaking system for making the interior intracavity heat atmosphere evenly distributed of inner cover body, a cooling system for cooling down the interior atmosphere of inner cover body cavity, an evacuating device for evacuating inner cover body and cooling system, a nitrogen charging device for filling nitrogen gas into the inner cover body cavity, the furnace body includes the furnace body, fixed shrouding that blocks in furnace body length direction one end, block at the furnace body length direction other end and with the separable furnace door of furnace body, inner cover body length direction one end is fixed mutually with the shrouding, the inner cover body length direction other end can be sealed mutually with the furnace door.

Preferably, the furnace body is cylindrical, and the inner cover is cylindrical.

Preferably, the inner envelope is corrugated over all or part of its length.

Preferably, the heater is arranged on the inner circumferential surface of the furnace body, and the soaking system is used for uniformly transferring the heat transferred to the circumference of the inner cover body by the heater to the coiled material.

Preferably, the soaking system comprises a guide cylinder arranged in the cavity of the inner cover body, the guide cylinder is provided with an air inlet and an air outlet which are positioned at two axially corresponding ends of the guide cylinder, a guide heating channel is formed between the guide cylinder and the inner cover body, and the coiled material is positioned in the guide cylinder and positioned between the air inlet and the air outlet; the soaking system also comprises a circulating fan which is used for enabling the gas in the guide cylinder and the guide heating channel to circularly flow.

Preferably, the circulating fan is arranged outside the guide cylinder, and the air outlet of the guide cylinder is arranged corresponding to the suction inlet of the circulating fan.

Preferably, the air outlet of the guide cylinder is located in the radial middle of the guide cylinder, and the air outlet of the guide cylinder corresponds to the radial middle of the coiled material.

Preferably, the cooling system comprises a heat exchanger communicated with the inner cover body cavity through an air inlet pipe and an air outlet pipe, a flow guide fan and valves arranged on the air inlet pipe and the air outlet pipe.

Preferably, the support mechanism comprises a support assembly fixedly butted with the furnace body and a sliding frame arranged in a sliding manner relative to the support assembly along the length direction of the furnace body, one end of the sliding frame is fixedly connected with the furnace door, and the coiled material is supported on the sliding frame; the sliding frame is provided with a first station and a second station, when the sliding frame is positioned at the first station, the furnace door is far away from the furnace body along the length direction of the furnace body, and the coiled material can be placed on the sliding frame; when the sliding frame is positioned at the second station, the furnace door and the furnace body are closed, the sliding frame and the coiled material on the sliding frame are positioned in the inner cover body cavity, the cavity of the inner cover body is closed, and the coiled material can be subjected to heat treatment operation.

Preferably, the support assembly comprises support rails which are positioned at two transverse sides in the inner cover body cavity and extend along the length direction of the furnace body, and support columns which are fixedly connected with the furnace body and provide support for the support rails; the sliding frame comprises an underframe with a pulley rotatably arranged at the bottom and vertical blocks sequentially arranged on the underframe in the length direction of the furnace body, one end part of the underframe is fixedly connected with the furnace door, and coiled materials are erected on the vertical blocks at two sides through a cross beam; the cylindrical furnace also comprises a trolley which is used for driving the furnace door to move and further driving the sliding frame to move.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

according to the horizontal cylindrical furnace, the inner cover body is arranged in the furnace body, an excellent airtight space is provided for heat treatment of the coiled material, and atmosphere protection is provided for heat treatment of the coiled material in the airtight space through matching design of the vacuumizing device, the nitrogen filling device and the like; in addition, through the design of the soaking system and the cooling system, a solid quality guarantee is provided for the heat treatment of the coiled material product by the cylindrical furnace; the horizontal cylindrical furnace can carry out heat treatment on the metal which is easy to oxidize, decarbonize and carburize through the excellent air tightness structural design, solves the problem that a box-type furnace cannot meet the air tightness requirement when the metal with the extremely high air tightness requirement is subjected to heat treatment in the prior art, and also improves the application range of the cylindrical furnace; in addition, the vertical design of the traditional heating furnace is changed, the furnace body is transversely arranged, and the supporting mechanism is matched with the furnace door, so that the cylindrical furnace is not required to turn the coiled material to a horizontal state during feeding, the work of hoisting and turning the material is omitted, and the feeding is more convenient; the work of changing the cover body is not needed during cooling, the atmosphere in the furnace is directly cooled through a cooling system, and the working efficiency is greatly improved.

Drawings

FIG. 1 is a side view of a cylindrical furnace of the present invention (with the carriage in a second station);

FIG. 2 is a side view of the cylindrical furnace of the present invention (with the carriage in the first station);

FIG. 3 is a sectional view taken along line A-A of FIG. 1;

wherein: 10. a furnace body; 101. a flange; 102. a seal ring; 11. closing the plate; 12. a furnace door; 13. an inner cover body; 20. a circulating fan; 21. a draft tube; 211. an air inlet; 212. an air outlet; 300. a pulley; 301. a chassis; 302. erecting a block; 303. a support pillar; 304. a support rail; 41. a support; 42. a frame; 43. a drive motor; 50. a heater; 60. a heat exchanger; 61. an air inlet pipe; 62. an air outlet pipe; 70. a vacuum pumping device; 80. a nitrogen charging device; 1000. a coil stock; 1001. a cross member.

Detailed Description

The technical solution of the present invention is further explained with reference to the drawings and the detailed description.

As shown in fig. 1 to 3, a horizontal cylindrical furnace comprises a horizontally arranged furnace body, an inner cover 13 (the inner cover 13 is cylindrical) which is arranged in the furnace body and can contain a coiled material 1000, a supporting mechanism which can support the inner cover 13 and the coiled material 1000, a heater 50 which can heat the atmosphere in the cavity of the inner cover 13 and provide heat, a soaking system which can make the hot atmosphere in the cavity of the inner cover 13 uniformly distributed, a cooling system which can cool the atmosphere in the cavity of the inner cover 13, a vacuumizing device 70 which can vacuumize the inner cover 13 and the cooling system, and a nitrogen charging device 80 which can charge nitrogen into the cavity of the inner cover 13, wherein the furnace body comprises a furnace body 10 (the furnace body 10 is cylindrical), a sealing plate 11 which fixedly seals one end of the furnace body 10 in the length direction, a furnace door 12 which seals the other end of the furnace body 10 in the length direction and is separable from the furnace body 10, one end of the inner cover 13 in the length direction is fixed with the sealing plate, the other end of the inner cover body 13 in the length direction can be sealed with the furnace door 12, a flange 101 is arranged at one end of the furnace body 10 and the inner cover body 13 close to the furnace door 12, a sealing ring 102 is arranged on the flange 101, and when the furnace door 12 is closed with the furnace body 10 and the inner cover body 13, the sealing between the furnace door 12 and the flange 101 is realized through the sealing ring 102.

In this embodiment, the heater 50 is disposed on the inner circumferential surface of the furnace body 10, the heat of the heater 50 is transferred to the inner cover 13, and the entire or a part of the inner cover 13 extends in a corrugated shape in the length direction, so that the thermal expansion of the inner cover 13 can be effectively eliminated by the corrugated structure, the heat exchange area of the inner cover can be greatly increased, the heat exchange efficiency can be improved, and the heat generated by the heater 50 can be effectively received;

the soaking system is used for uniformly transferring the heat transferred to the whole body of the inner cover body 13 by the heater 50 to the coiled material 1000;

specifically, the soaking system comprises a guide cylinder 21 and a circulating fan 20 which are arranged in the cavity of the inner cover body 13, the guide cylinder 21 is provided with an air inlet 211 and an air outlet 212 which are positioned at two axially corresponding ends of the guide cylinder, a guide heating channel is formed between the guide cylinder 21 and the inner cover body 13, and the coiled material 1000 is positioned in the guide cylinder 21 and positioned between the air inlet 211 and the air outlet 212; the circulating fan 20 is used for making the gas in the guide shell 21 and in the guide heating channel circularly flow, the circulating fan 20 (which is a centrifugal fan) is arranged outside the guide shell 21, and the air outlet 212 of the guide shell 21 is arranged corresponding to the suction inlet of the fan.

The air in the guide cylinder 21 is sucked into the circulating fan 20 from the air outlet 212 of the guide cylinder 21 by the suction inlet of the circulating fan 20 and is discharged to the guide heating channel from the discharge outlet of the circulating fan 20, the air exchanges heat with the heat around the inner cover 13 when passing through the guide heating channel, and the air enters the guide cylinder 21 from the air inlet 211 of the guide cylinder 21 after being heated and uniformly heats the coiled material 1000 in the guide cylinder 21;

in addition, an air outlet 212 (the air outlet 212 is circular) of the draft tube 21 is smaller than an air inlet 211 (the air inlet 211 is circular, the caliber of the air outlet 212 is equal to the inner diameter of the draft tube 21) of the draft tube 21, the air outlet 212 of the draft tube 21 is located in the radial middle of the draft tube 21, and the air outlet 212 of the draft tube 21 corresponds to the radial middle of the coiled material 1000; through the position design of the air inlet 211 and the air outlet 212 and the relative position design of the air inlet 211 and the air outlet and the coiled material 1000, hot air entering the air inlet 211 of the guide cylinder 21 does not gather and pass through one position, but one part of the hot air is scattered and passes by the outer periphery of the coiled material 1000, the other part of the hot air is scattered and passes by the inner periphery of the coiled material 1000, the coiled material 1000 is heated very uniformly, and therefore the heat treatment efficiency of the coiled material 1000 is improved.

Further, the supporting mechanism comprises a supporting component fixedly butted with the furnace body 10 and a sliding frame arranged in a sliding manner relative to the supporting component along the length direction of the furnace body 10, one end part of the sliding frame is fixedly connected with the furnace door 12, and the coiled material 1000 is supported on the sliding frame; the sliding frame is provided with a first station and a second station, when the sliding frame is positioned at the first station, the furnace door 12 is far away from the furnace body 10 along the length direction of the furnace body 10, and the coiled material 1000 can be placed on the sliding frame; when the sliding frame is located at the second station, the furnace door 12 and the furnace body 10 are close to each other, the sliding frame and the coiled material 1000 thereon are located in the cavity of the inner cover body 13, the cavity of the inner cover body 13 is sealed, and the coiled material 1000 can be subjected to heat treatment operation. Specifically, the support assembly includes support rails 304 located on two lateral sides in the cavity of the inner hood 13 and extending along the length direction of the furnace shell 10, and support columns 303 fixedly connected to the furnace shell 10 and providing support for the support rails 304, the support columns 303 have a plurality of support columns 303, in this example, the upper end portions of the plurality of support columns 303 are fixedly connected to the support rails 304, the lower end portions of the plurality of support columns 303 penetrate downwards through the guide cylinder 21, the inner hood 13, the furnace shell 10 to below the bottom of the furnace shell 10 and can be supported on the ground, and the support rails 304, the guide cylinder 21, the inner hood 13, and the furnace shell 10 can be fixedly connected to the support columns 303.

The sliding frame comprises an underframe 301 with a pulley 300 rotatably arranged at the bottom and upright blocks 302 sequentially arranged on the underframe 301 in the length direction of the furnace body 10, one end part of the underframe 301 is fixedly connected with the furnace door 12, and a coiled material 1000 is erected on the upright blocks 302 at two sides through a cross beam 1001; in this example, two or three rolls or more rolls of products can be erected in the furnace for heat treatment, when two rolls of products are sleeved on one cross beam 1001, three upright blocks 302 are needed, then the cross beam 1001 is placed on the upright blocks 302, two upright blocks 302 are located at two ends of the cross beam 1001, one upright block 302 is located in the middle of the cross beam 1001 (between two rolls of products), when three rolls of products are erected in the furnace, four upright blocks 302 can be arranged in sequence, and so on.

In addition, the cylindrical furnace also comprises a trolley for driving the furnace door 12 to move and further driving the sliding frame to move. The trolley comprises a bracket 41 fixedly connected with the oven door 12, a frame 42 provided with wheels and a driving motor 43 for driving the wheels to rotate.

The trolley drives the furnace door 12 to move through the driving motor 43, when the coiled material 1000 needs to be loaded or the heat-treated coiled material 1000 needs to be taken out, the trolley drives the furnace door 12 to be away from the furnace body 10 and the inner cover body 13 and draws the sliding frame out of the furnace until the sliding frame moves to a first station, at the moment, one end of the sliding frame, which is away from the furnace door 12, is still erected on the supporting rail 304, and an operator can carry out loading or unloading operation; when the loading is completed and the coiled material product needs to be subjected to heat treatment, the trolley can drive the furnace door 12 to approach the end parts of the furnace body 10 and the inner cover body 13 and push the sliding frame and the coiled material 1000 thereon into the furnace until the sliding frame moves to the second station, at this time, the furnace door 12 is completely closed (the furnace door 12 is pressed by the pressing mechanism), and the coiled material 1000 can be subjected to heat treatment operation by placing the coiled material 1000 into a proper position in the furnace.

Further, the cooling system comprises a heat exchanger 60 communicated with the inner cavity of the inner cover body 13 through an inlet pipe 61 and an outlet pipe 62, a guiding fan (not shown in the figure), and valves arranged on the inlet pipe 61 and the outlet pipe 62. When the coiled material 1000 is cooled, the cover body does not need to be replaced, the atmosphere in the furnace is directly cooled through the cooling system, the operation steps are reduced, and the working efficiency is further improved.

Further, the vacuum-pumping device 70 is used for evacuating the furnace after the charging process and before the heating process, then the nitrogen-charging device 80 is used for charging the furnace with protective gas (nitrogen gas), the evacuation provides a less-oxygen (or nearly-oxygen-free) process environment for the heat treatment process, the neutral or inert gas is further refilled after the evacuation process to achieve a cleaner protective atmosphere environment under different pressures, and the oxidation is inhibited because the partial pressure content of oxygen in the atmosphere is lower than the oxide decomposition pressure of the heated metal surface after the evacuation process, so that the brightness of the treated metal product surface can be kept unchanged to a great extent compared with the original surface brightness.

In addition, before the coiled material 1000 is cooled after being heated, the inner cavity of the heat exchanger 60 needs to be evacuated by the evacuation device 70, so that when the product is cooled, the impurity gas in the inner cavity of the heat exchanger 60 enters the furnace, and the heat treatment quality of the product is ensured.

In summary, the horizontal cylindrical furnace of the invention is provided with the inner cover body inside the furnace body, so as to provide an excellent airtight space for heat treatment of the coiled material, and provide atmosphere protection for heat treatment of the coiled material in the airtight space through matching design of the vacuum pumping device, the nitrogen filling device and the like; in addition, through the design of the soaking system and the cooling system, a solid quality guarantee is provided for the heat treatment of the coiled material product by the cylindrical furnace; the horizontal cylindrical furnace can carry out heat treatment on the metal which is easy to oxidize, decarbonize and carburize through the excellent air tightness structural design, solves the problem that a box-type furnace cannot meet the air tightness requirement when the metal with the extremely high air tightness requirement is subjected to heat treatment in the prior art, and also improves the application range of the cylindrical furnace; in addition, the vertical design of the traditional heating furnace is changed, the furnace body is transversely arranged, and the supporting mechanism is matched with the furnace door, so that the cylindrical furnace is not required to turn the coiled material to a horizontal state during feeding, the work of hoisting and turning the material is omitted, and the feeding is more convenient; the furnace door is opened, coiled material products in the furnace are synchronously taken out, the furnace door is closed, the coiled material products are synchronously pushed into the furnace, the coiled material products can be put into and taken out by opening and closing the furnace door, the operation steps are simple, the operation is convenient, the work efficiency is improved, the work of replacing the cover body is not needed during cooling, the furnace atmosphere is directly cooled through the cooling system, and the work efficiency is further improved.

The present invention is described in detail in order to make those skilled in the art understand the content and practice the invention, and the invention is not limited to the above embodiments, and all equivalent changes or modifications made according to the spirit of the invention should be covered by the scope of the invention.