WO2020114171A1 - 轴承钢棒管材的双层等温球化退火热处理设备 - Google Patents

轴承钢棒管材的双层等温球化退火热处理设备 Download PDF

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WO2020114171A1
WO2020114171A1 PCT/CN2019/115574 CN2019115574W WO2020114171A1 WO 2020114171 A1 WO2020114171 A1 WO 2020114171A1 CN 2019115574 W CN2019115574 W CN 2019115574W WO 2020114171 A1 WO2020114171 A1 WO 2020114171A1
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Prior art keywords
pipe
bearing steel
furnace
heat exchange
steel rod
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PCT/CN2019/115574
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English (en)
French (fr)
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蒋宗轩
蒋铭根
徐芳
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苏州中门子工业炉科技有限公司
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Publication of WO2020114171A1 publication Critical patent/WO2020114171A1/zh

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C21D1/32—Soft annealing, e.g. spheroidising
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes

Definitions

  • the utility model belongs to the field of heat treatment, and particularly relates to a double-layer isothermal spheroidizing annealing heat treatment device for bearing steel rod pipes.
  • the heat treatment process is used to change the internal structure of the workpiece and improve the strength and service life of the workpiece. Therefore, the heat treatment step is an indispensable step for forming the workpiece.
  • a single-layer transmission roller set for transmitting bearing steel is arranged in the furnace, and the bearing steel is sequentially heated, insulated, air-cooled, isothermal, and slowly cooled on the transmission roller to complete the bearing Isothermal spheroidizing annealing process for steel.
  • the bearing steel after annealing usually reaches 550°C. After output from the furnace, it needs to be cooled.
  • the other layer of transmission roller group transmits the normal temperature bearing just sent into the furnace port Steel (also known as cold material), high-temperature bearing steel and room temperature bearing steel can exchange heat, room temperature bearing steel heats up, recovers the heat of high-temperature bearing steel that was originally wasted, and reduces the heat required for subsequent entry and other greenhouses,
  • the cooler can cool the high-temperature bearing steel coming out of the heating and insulation room.
  • the high-temperature bearing steel and the low-temperature bearing steel on the upper and lower drive roller groups can also exchange heat
  • the heat of the high-temperature bearing steel is recovered, the temperature of the low-temperature bearing steel is increased, and the requirement for the heat required for the low-temperature bearing steel to enter the heating and insulation room is reduced, which further saves energy and reduces the waste of heat.
  • the position of the cooler in the intercooling room is very important. If the heat exchange is not sufficient, it takes a long time to cool the isothermal chamber in the heating and holding room. Therefore, the time for the bearing steel to stay in the isothermal zone must be shortened.
  • the technical problem to be solved by the present invention is to overcome the shortcomings of the prior art, and to provide an improved double-layer isothermal spheroidizing annealing heat treatment equipment for bearing steel rod pipes.
  • a double-layer isothermal spheroidizing annealing heat treatment equipment for bearing steel rod pipes which includes
  • the furnace body includes a heat exchange zone, an isothermal zone, an intermediate cooling zone, a heating insulation zone, an intermediate cooling zone, an isothermal zone, and a heat exchange zone arranged in order from the inlet to the outlet;
  • Furnace roller assembly which includes an upper furnace roller group and a lower furnace roller group which are arranged in each zone of the furnace body and are located on the upper and lower two layers;
  • the cooler includes an upper cooling unit and a lower cooling unit which are respectively arranged on the upper layer and the lower layer of the intercooling zone and reduce the temperature of the bearing steel rod pipe on the upper furnace roller group or the lower furnace roller group,
  • the upper cooling unit includes a circulation fan located at the top of the upper furnace roller group, a diversion pipe communicating with the air outlet of the circulation fan and guiding the hot gas at the upper layer to the lower layer, communicating with the diversion pipe and discharging the hot gas to the furnace roller
  • the exhaust pipe of the group where the airflow discharged from the exhaust pipe exchanges heat with the bearing steel rod tube on the lower furnace roller group, flows to the upper furnace roller group and continues to absorb heat, and then flows down the furnace roller group for heat exchange to form a circulating air flow ;
  • the lower cooling unit includes a heat exchange tube located at the bottom of the lower furnace roller group, a fan communicating with both ends of the heat exchange tube to form a flowing heat exchange airflow, and an exhaust pipe.
  • the fan impeller of the circulation fan is horizontally arranged at the air inlet.
  • Facilitates the flow of hot gas realizes the rapid cooling of the upper bearing steel rod pipe, and also facilitates the rapid heat exchange of the lower bearing steel rod pipe. Therefore, while realizing the conversion of heat energy, the rapid cooling of the upper bearing steel rod pipe To shorten the cooling time, so as to ensure the heat treatment time of the bearing steel rod pipe in the isothermal zone, and improve the heat treatment quality of the bearing steel rod pipe.
  • the circulation fan has two air outlets and is located on opposite sides, and the deflector includes branch pipes that respectively connect the air outlet and the two ends of the exhaust duct.
  • the diversion pipe and the exhaust pipe form a group of circulating airflow pipes
  • the upper cooling unit has a plurality of groups of the circulating airflow pipes sharing a circulating fan.
  • the furnace rollers of the upper furnace roller group and the lower furnace roller group are aligned up and down, and multiple sets of circulating air flow lines are arranged staggered with the plurality of furnace rollers located in the intercooling area, and the airflow discharged from the exhaust pipe directly flows into the furnace
  • the bearing steel rod pipe on the roller set exchanges heat.
  • the exhaust duct includes a tube body located below the lower furnace roll group and connected to the branch pipes at both ends, and arranged on the tube body and capable of discharging hot gas directly to the furnace roller
  • the exhaust duct further includes an airflow branch pipe that communicates with each exhaust hole and guides the airflow to the bearing steel rod pipe.
  • the lower cooling unit also includes an air supply line for connecting the air outlet of the fan with the multiple heat exchange tubes, and an outlet for connecting the multiple heat exchange tubes with the exhaust pipe Air line.
  • the air supply pipeline includes a tandem tube for connecting the inlet ends of multiple heat exchange tubes, and a ventilation main pipe for connecting the tandem tube with the fan air outlet;
  • the air outlet pipeline includes multiple A communication pipe communicating with the outlet end of the heat pipe, wherein the intake end of the exhaust pipe communicates with the communication pipe.
  • the upper and lower layers of the furnace body are connected to each other, and the heat treatment equipment further includes a curtain seal provided at the entrance and exit of the furnace body, and an inlet and outlet section respectively provided for the furnace body and used to put the upper roller group and The partitions spaced apart from the lower furnace roller group make the air flow at both ends of the furnace body more stable, and at the same time, the gas barrier effect is better.
  • the present invention has the following advantages compared with the prior art:
  • the utility model can not only quickly realize the cooling of the upper bearing steel rod pipe through the circulating air flow, shorten the cooling time in the intermediate cooling zone, ensure the heat treatment time in the isothermal zone, and improve the heat treatment quality; but also can apply hot gas to the lower bearing
  • the heat exchange of the steel rod pipe realizes the utilization of waste heat; on the other hand, the air current flowing at the bottom quickly removes the heat energy of the lower bearing steel rod pipe, thereby achieving the rapid cooling of the lower bearing steel rod pipe.
  • Figure 1 is a schematic diagram of the structure of the annealing and heat treatment equipment of the present invention
  • FIG. 2 is a schematic front view of the upper cooling unit in FIG. 1;
  • Figure 3 is a schematic side view of Figure 2;
  • FIG. 4 is a schematic front view of the lower cooling unit in FIG. 1;
  • FIG. 5 is a schematic side view of FIG. 4;
  • Figure 6 is the temperature change curve of the bearing steel rod tube during the heat treatment process of the present invention (where the arrow represents the moving direction of the bearing steel rod tube);
  • first and second are used for description purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
  • the features defined with “first” and “second” may include at least one of the features either explicitly or implicitly.
  • the meaning of “plurality” is at least two, such as two, three, etc., unless otherwise specifically limited.
  • the terms “installation”, “connected”, “connected”, “fixed” and other terms should be understood in a broad sense, for example, it can be fixed or detachable Connected, or integrated; may be mechanical connection or electrical connection; may be directly connected or indirectly connected through an intermediary, may be the internal connection of two elements or the interaction relationship of two elements, unless otherwise Clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.
  • the first feature “above” or “below” the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly through an intermediary contact.
  • the first feature is “above”, “above” and “above” the second feature may be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
  • the first feature is “below”, “below”, and “below” the second feature may be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontal than the second feature.
  • this embodiment relates to a double-layer isothermal spheroidizing annealing heat treatment equipment for a bearing steel rod tube, which includes: a furnace body 1, which includes a heat exchange zone 10, an isothermal zone 11, and an Cold zone 12, heating and insulation zone 13, intermediate cooling zone 14, isothermal zone 15, and heat exchange zone 16;
  • the furnace roller assembly 2 includes an upper furnace roller group 20 and a lower furnace roller group 21 that are arranged in each zone of the furnace body 1 and are located in the upper and lower layers;
  • the cooler 3 includes an upper cooling unit 30 and a lower cooling unit 30 which are respectively arranged on the upper layer of the intercooling zone 14 and the lower layer of the intercooling zone 12 and reduce the temperature of the bearing steel rod pipe on the upper furnace roll group 20 or the lower furnace roll group 21 Cooling unit 31.
  • the furnace rollers forming the upper furnace roller group 20 and the lower furnace roller group 21 are aligned up and down and arranged one-to-one.
  • the upper cooling unit 30 includes a circulation fan 30a at the top of the upper furnace roll group 20, a deflector tube 30b that communicates with the air outlet of the circulation fan 30a and guides the hot gas at the upper layer to the lower layer, and the diversion
  • the tubes 30b communicate with each other and discharge the hot gas to the exhaust duct 30c of the furnace roller group 21, wherein the air flow discharged from the exhaust duct 30c exchanges heat with the bearing steel rod tube on the lower furnace roller group 21 and flows to the furnace roller group 20 And continue to absorb heat and then flow down to the furnace roller group 21 for heat exchange to form a circulating air flow.
  • the fan impeller 30d of the circulation fan 30a is horizontally arranged at the air inlet.
  • Facilitates the flow of hot gas realizes the rapid cooling of the upper bearing steel rod pipe, and is also conducive to the rapid heat exchange of the lower bearing steel rod pipe. Therefore, while realizing the conversion of heat energy, the rapid cooling of the upper bearing steel rod pipe To shorten the cooling time, so as to ensure the heat treatment time of the bearing steel rod pipe in the isothermal zone, and improve the heat treatment quality of the bearing steel rod pipe.
  • the circulation fan 30a has two air outlets and is located on opposite sides.
  • the diversion pipe 30b includes branch pipes b1 that respectively connect the air outlet and the two ends of the exhaust duct 30c.
  • the deflector 30b and the exhaust duct 30c form a group of circulating air flow lines, and the upper cooling unit has multiple groups of circulating air flow lines sharing a circulating fan.
  • the multiple sets of circulating air flow lines are staggered from the multiple furnace rolls located in the intermediate cooling zone, and the air flow discharged from the exhaust pipe directly flows down to the bearing steel rod tubes on the furnace roll set for heat exchange. In this way, convection can be quickly formed, and it is also convenient to form a circulating air flow.
  • the exhaust duct 30c includes a tube body c1 located under the lower furnace roll group 21 and communicating with the branch pipes b1 at both ends, and a bearing steel rod tube provided on the tube body c1 and capable of discharging hot gas directly to the furnace roll group
  • a plurality of exhaust holes (not shown in the figure) for heat exchange, and they are evenly distributed along the longitudinal direction of the tube body c1 located in the furnace body 1.
  • the exhaust duct 30c further includes an airflow branch pipe c2 communicating with each exhaust hole and guiding the airflow to the bearing steel rod pipe.
  • the lower cooling unit 31 includes a heat exchange tube 31a at the bottom of the lower furnace roller group 21, a fan 31b communicating with both ends of the heat exchange tube 31a to form a flowing heat exchange airflow, and an exhaust pipe 31c.
  • the lower cooling unit 31 further includes an air supply line 31d for connecting the outlet of the fan to the multiple heat exchange tubes 31a, and the multiple heat exchange tubes 31a and The exhaust duct 31e communicating with the exhaust pipe 31c.
  • the air supply pipe 31d includes a tandem pipe d1 for connecting the inlet ends of the plurality of heat exchange tubes 31a, and a vent main pipe d2 for connecting the tandem pipe d1 with the air outlet of the fan 31b; the exhaust pipe There are a plurality of 31c, and the heat exchange tubes 31a and the exhaust pipes 31c are in one-to-one correspondence with each other through the air outlet pipe 31e.
  • the heat treatment equipment further includes a curtain seal 4 provided at the entrance and exit of the furnace body, and an inlet and outlet section respectively provided in the furnace body 1 and used to put this section on the furnace.
  • the partition 5 between the roller set and the lower furnace roller set makes the air flow at both ends of the furnace body 1 more stable, and at the same time, the gas blocking effect is better.

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Abstract

一种轴承钢棒管材的双层等温球化退火热处理设备，包括：炉体（1），炉体（1）被划分处于中央的加热保温区（13）、由近及远依次对称地设置在所述加热保温区（13）两边的中冷区（12、14）、等温区（11、15）、热交换区（10、16）；炉辊组件（2），包括上、下炉辊组（20、21）；冷却器（3），其包括上、下冷却单元（30、31），该上冷却单元（30）包括循环风机（30a）、导流管（30b）、排气管道（30c），其中自排气管道排出的气流与下炉辊组（21）上的轴承钢棒管材换热后流向上炉辊组（20）并继续吸热再流向下炉辊组（21）进行热交换，形成循环气流；下冷却单元（31）包括换热管（31a）、风机（31b）、以及排气管（31c）。该热处理设备在实现余热利用的前提下，缩短在中冷区（12、14）的降温时间，确保在等温区（11、15）的热处理时间，提高热处理品质，同时通过流动的气流快速的将热能带走，从而实现轴承钢棒管材的快速降温。

Description

轴承钢棒管材的双层等温球化退火热处理设备 技术领域
本实用新型属于热处理领域，具体涉及一种轴承钢棒管材的双层等温球化退火热处理设备。
背景技术
众所周知，热处理过程用来改变工件的内部组织结构，提高工件的强度和使用寿命，因此，热处理步骤是工件成型必不可少的步骤。
而现有的轴承钢等温球化退火炉上，炉膛中设置有用于传送轴承钢的单层传动辊组，轴承钢在传动辊上，依次经过加热、保温、空冷、等温、缓冷，完成轴承钢的等温球化退火工艺，退火完成的轴承钢通常达到550℃，从炉膛中输出后，还需进行冷却，550℃以下，已不会对轴承钢材料球化退火组织产生影响，但轴承钢仍具有很大的热容量，大量的热能将随物料的冷却而浪费，不但浪费热能，还污染环境。
故针对上述难题，申请人于2011-06-03，提出申请号为201110149467.9，专利名称为轴承钢连续等温球化退火炉及退火工艺，其采用的该退火炉可以双层双向处理轴承钢，这样在余热回收热交换室，上下两层传动辊组其中一层传动辊组上假如传送将要送出炉口的高温轴承钢，则另外一层传动辊组上传送的是刚送入炉口的常温轴承钢(又称为冷料)，高温轴承钢与常温轴承钢可以进行热交换，常温轴承钢升温，回收了原本要浪费掉的高温轴承钢的热量，而且减少了后续进入等温室需要的热量，达到节能的效果，在中冷室中，冷却器可对从加热保温室出来的高温轴承钢进行冷却，此时上下层传动辊组上的高温轴承钢和低温轴承钢之间也可以进行热交换，回收了高温轴承钢的热量，对低温轴承钢升温，降低了对低温轴承钢后续进入加热保温室所需热量的要求，进一步地节能，减少了热量的浪费。
然而，位于中冷室的冷却器的位置十分重要，若热交换不充分，在加热保温室向等温室降温的时间很长，因此，必然缩短轴承钢在等温区的时间。
发明内容
本发明所要解决的技术问题是克服现有技术的不足，提供一种改进的轴承钢棒管材的双层等温球化退火热处理设备。
为解决以上技术问题，本实用新型采取如下技术方案：
一种轴承钢棒管材的双层等温球化退火热处理设备，其包括
炉体，其包括自进口向出口依次布置的热交换区、等温区、中冷区、加热保温区、中冷区、等温区、热交换区；
炉辊组件，其包括设置在炉体各区中且位于上下两层的上炉辊组和下炉辊组；
冷却器，其包括分别设置在中冷区上层和下层、且对位于上炉辊组或下炉辊组上的轴承钢棒管材进行降温的上冷却单元和下冷却单元，
特别是，上冷却单元包括位于上炉辊组顶部的循环风机、与循环风机的出风口连通且将上层的热气导向下层的导流管、与导流管相连通且将热气排向下炉辊组的排气管道，其中自排气管道排出的气流与下炉辊组上的轴承钢棒管材换热后流向上炉辊组并继续吸热再流向下炉辊组进行热交换，形成循环气流；
下冷却单元包括位于下炉辊组底部的换热管、与换热管两端连通形成流动的换热气流的风机、以及排气管。
优选地，循环风机的风机叶轮水平的设置在进气口处。便于热气的流动，实现上层轴承钢棒管材的快速降温，同时也有利于位于下层轴承钢棒管材的快速换热，因此，在实现热能换转利用的同时，快速实现上层轴承钢棒管材的降温，缩短降温的时间，从而确保轴承钢棒管材在等温区的热处理时间，提高轴承钢棒管材热处理品质。
根据本实用新型的一个具体实施和优选方面，循环风机具有两个出风口，且位于相对两侧，导流管包括分别将出风口与排气管道的两端部相连通的支管。
优选地，导流管和排气管道形成一组循环气流管路，上冷却单元具有共用一个循环风机的多组所述循环气流管路。
具体的，上炉辊组和下炉辊组的炉辊上下对齐设置，多组循环气流管路与位于中冷区的多根炉辊相错开设置，自排气管道排出的气流直接流向下炉辊组上的轴承钢棒管材进行换热。
根据本实用新型又一个具体实施和优选方面，排气管道包括位于下炉辊组下方且两端部分别与支管相连通的管体、设置在管体上且能够将热气直接排向下 炉辊组上的轴承钢棒管材进行换热的排气孔，优选地，排气孔有多个，且沿着位于炉体内管体长度方向均匀间隔分布。
为了防止气流的分散，本例中，排气管道还包括分别与每个排气孔连通，且将气流导向轴承钢棒管材的气流支管。
此外，换热管有多根，下冷却单元还包括用于将风机的出风口与多根换热管相连通的送风管路、以及将多根换热管与排气管相连通的出风管路。
优选地，送风管路包括用于将多根换热管进风端部相连通的串接管、用于将串接管与风机出风口相连通的通气主管；出风管路包括将多根换热管出风端部相连通的连通管，其中排气管的进气端部与连通管相连通。
具体的，炉体内上下两层之间相互连通的，热处理设备还包括设置在炉体进出口处的门帘密封、以及分别设置在炉体的进出料段且用于将该段上炉辊组和下炉辊组间隔开的隔板，使得炉体两端的气流更加平稳，同时，阻气效果更好。
由于以上技术方案的实施，本实用新型与现有技术相比具有如下优点：
本实用新型一方面通过循环气流不仅能够快速的实现上层轴承钢棒管材的降温，缩短在中冷区的降温时间，确保在等温区的热处理时间，提高热处理品质；而且还能够将热气对下层轴承钢棒管材的换热，实现余热利用；另一方面通过底部流动的气流快速的将下层轴承钢棒管材的热能带走，从而实现下层轴承钢棒管材快速降温。
附图说明
下面结合附图和具体的实施例，对本实用新型做进一步详细的说明：
图1为本实用新型退火热处理设备的结构示意图；
图2为图1中上冷却单元的主视示意图；
图3为图2的侧视示意图；
图4为图1中下冷却单元的主视示意图；
图5为图4的侧视示意图；
图6为本实用新型热处理过程中轴承钢棒管材的温度变化曲线(其中箭头代表轴承钢棒管材的移动方向)；
其中：1、炉体；10，16、热交换区；11，15、等温区；12，14、中冷区； 13、加热保温区；2、炉辊组件；20、上炉辊组；21、下炉辊组；3、冷却器；30、上冷却单元；30a、循环风机；30b、导流管；b1、支管；30c、排气管道；c1、管体；c2、气流支管；30d、风机叶轮；31、下冷却单元；31a、换热管；31b、风机；31c、排气管；31d、送风管路；d1、串接管；d2、通气主管；31e、出风管路；e1、连通管；4、门帘密封；5、隔板。
具体实施方式
为使本实用新型的上述目的、特征和优点能够更加明显易懂，下面结合附图与具体实施方式对本实用新型做详细的说明。在下面的描述中阐述了很多具体细节以便于充分理解本实用新型。但是本实用新型能够以很多不同于在此描述的其它方式来实施，本领域技术人员可以在不违背本实用新型内涵的情况下做类似改进，因此本实用新型不受下面公开的具体实施例的限制。
在本实用新型的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本实用新型和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本实用新型的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本实用新型的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本实用新型中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本实用新型中的具体含义。
在实用新型中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接 触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
需要说明的是，当元件被称为“固定于”或“设置于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。本文所使用的术语“垂直的”、“水平的”、“上”、“下”、“左”、“右”以及类似的表述只是为了说明的目的，并不表示是唯一的实施方式。
如图1所示，本实施例涉及轴承钢棒管材的双层等温球化退火热处理设备，其包括：炉体1，其包括自进口向出口依次布置的热交换区10、等温区11、中冷区12、加热保温区13、中冷区14、等温区15、热交换区16；
炉辊组件2，其包括设置在炉体1各区中且位于上下两层的上炉辊组20和下炉辊组21；
冷却器3，其包括分别设置在中冷区14上层和中冷区12下层、且对位于上炉辊组20或下炉辊组21上的轴承钢棒管材进行降温的上冷却单元30和下冷却单元31。
本例中，形成上炉辊组20和下炉辊组21的炉辊之间上下对齐且一一对应设置。
如图2和图3所示，上冷却单元30包括位于上炉辊组20顶部的循环风机30a、与循环风机30a的出风口连通且将上层的热气导向下层的导流管30b、与导流管30b相连通且将热气排向下炉辊组21的排气管道30c，其中自排气管道30c排出的气流与下炉辊组21上的轴承钢棒管材换热后流向上炉辊组20并继续吸热再流向下炉辊组21进行热交换，形成循环气流。
本例中，循环风机30a的风机叶轮30d水平的设置在进气口处。便于热气的流动，实现上层轴承钢棒管材的快速降温，同时也有利于位于下层轴承钢棒管材的快速换热，因此，在实现热能换转利用的同时，快速实现上层轴承钢棒管材的降温，缩短降温的时间，从而确保轴承钢棒管材在等温区的热处理时间，提高轴承钢棒管材热处理品质。
循环风机30a具有两个出风口，且位于相对两侧，导流管30b包括分别将出风口与排气管道30c的两端部相连通的支管b1。
导流管30b和排气管道30c形成一组循环气流管路，上冷却单元具有共用一个循环风机的多组循环气流管路。
多组循环气流管路与位于中冷区的多根炉辊相错开设置，自排气管道排出的气流直接流向下炉辊组上的轴承钢棒管材进行换热。这样才能快速的形成对流，也便于形成循环气流。
排气管道30c包括位于下炉辊组21下方且两端部分别与支管b1相连通的管体c1、设置在管体c1上且能够将热气直接排向下炉辊组上的轴承钢棒管材进行换热的排气孔(图中未显示)，优选地，排气孔有多个，且沿着位于炉体1内管体c1长度方向均匀间隔分布。
进一步的，为了防止气流的分散，本例中，排气管道30c还包括分别与每个排气孔连通，且将气流导向轴承钢棒管材的气流支管c2。
结合附图4和图5所示，下冷却单元31包括位于下炉辊组21底部的换热管31a、与换热管31a两端连通形成流动的换热气流的风机31b、以及排气管31c。
本例中，换热管31a有多根，下冷却单元31还包括用于将风机的出风口与多根换热管31a相连通的送风管路31d、以及将多根换热管31a与排气管31c相连通的出风管路31e。
具体的，送风管路31d包括用于将多根换热管31a进风端部相连通的串接管d1、用于将串接管d1与风机31b出风口相连通的通气主管d2；排气管31c有多根，且分别通过出风管路31e将换热管31a与排气管31c一一对应连通。
此外，炉体1内上下两层之间相互连通的，热处理设备还包括设置在炉体进出口处的门帘密封4、以及分别设置在炉体1的进出料段且用于将该段上炉辊组和下炉辊组间隔开的隔板5，使得炉体1两端的气流更加平稳，同时，阻气效果更好。
然后，结合附图6所示，可明显看出位于上下层的轴承钢棒管材在不同区间内温度的变化，同时，上下层在中冷区和热交换区进行热交换，充分进行余热利用。
以上对本实用新型做了详尽的描述，其目的在于让熟悉此领域技术的人士能够了解本实用新型的内容并加以实施，并不能以此限制本实用新型的保护范围，凡根据本实用新型的精神实质所作的等效变化或修饰，都应涵盖在本实用新型的保护范围内。

Claims (14)

  1. 一种轴承钢棒管材的双层等温球化退火热处理设备，其包括
    炉体，其包括自进口向出口依次布置的热交换区、等温区、中冷区、加热保温区、中冷区、等温区、热交换区；
    炉辊组件，其包括设置在所述炉体各区中且位于上下两层的上炉辊组和下炉辊组；
    冷却器，其包括分别设置在所述中冷区上层和下层、且对位于所述上炉辊组或所述下炉辊组上的轴承钢棒管材进行降温的上冷却单元和下冷却单元，
    其特征在于：所述的上冷却单元包括位于所述上炉辊组顶部的循环风机、与所述的循环风机的出风口连通且将上层的热气导向下层的导流管、与所述导流管相连通且将热气排向所述下炉辊组的排气管道，其中自排气管道排出的气流与所述下炉辊组上的轴承钢棒管材换热后流向所述上炉辊组并继续吸热再流向所述下炉辊组进行热交换，形成循环气流；
    所述的下冷却单元包括位于所述下炉辊组底部的换热管、与所述的换热管两端连通形成流动的换热气流的风机、以及排气管。
  2. 根据权利要求1所述的轴承钢棒管材的双层等温球化退火热处理设备，其特征在于：所述循环风机的风机叶轮水平的设置在进气口处。
  3. 根据权利要求1或2所述的轴承钢棒管材的双层等温球化退火热处理设备，其特征在于：所述的循环风机具有两个出风口，且位于相对两侧，所述的导流管包括分别将所述的出风口与所述排气管道的两端部相连通的支管。
  4. 根据权利要求3所述的轴承钢棒管材的双层等温球化退火热处理设备，其特征在于：所述导流管和所述排气管道形成一组循环气流管路，所述上冷却单元具有共用一个所述循环风机的多组所述循环气流管路。
  5. 根据权利要求4所述的轴承钢棒管材的双层等温球化退火热处理设备，其特征在于：所述的上炉辊组和下炉辊组的炉辊上下对齐设置，多组所述循环气流管路与位于所述中冷区的多根所述炉辊相错开设置，自所述的排气管道排出的气流直接流向所述下炉辊组上的轴承钢棒管材进行换热。
  6. 根据权利要求5所述的轴承钢棒管材的双层等温球化退火热处理设备，其特征在于：所述的排气管道包括位于所述下炉辊组下方且两端部分别与所述 支管相连通的管体、设置在所述管体上且能够将热气直接排向所述下炉辊组上的轴承钢棒管材进行换热的排气孔。
  7. 根据权利要求6所述的轴承钢棒管材的双层等温球化退火热处理设备，其特征在于：所述的排气孔有多个，且沿着位于所述炉体内所述管体长度方向均匀间隔分布。
  8. 根据权利要求7所述的轴承钢棒管材的双层等温球化退火热处理设备，其特征在于：所述的排气管道还包括分别与每个所述排气孔连通，且将气流导向轴承钢棒管材的气流支管。
  9. 根据权利要求1所述的轴承钢棒管材的双层等温球化退火热处理设备，其特征在于：所述的换热管有多根，所述的下冷却单元还包括用于将所述风机的出风口与多根所述换热管相连通的送风管路、以及将多根所述换热管与所述排气管相连通的出风管路。
  10. 根据权利要求9所述的轴承钢棒管材的双层等温球化退火热处理设备，其特征在于：所述的送风管路包括用于将多根所述换热管进风端部相连通的串接管、用于将所述串接管与所述风机出风口相连通的通气主管。
  11. 根据权利要求10所述的轴承钢棒管材的双层等温球化退火热处理设备，其特征在于：所述的出风管路包括将多根所述换热管出风端部相连通的连通管，其中所述排气管的进气端部与所述连通管相连通。
  12. 根据权利要求1所述的轴承钢棒管材的双层等温球化退火热处理设备，其特征在于：所述的炉体内上下两层之间相互连通的。
  13. 根据权利要求1所述的轴承钢棒管材的双层等温球化退火热处理设备，其特征在于：所述的热处理设备还包括设置在所述的炉体进出口处的门帘密封、以及分别设置在所述炉体的进出料段且用于将该段所述上炉辊组和所述下炉辊组间隔开的隔板。
  14. 根据权利要求1所述的轴承钢棒管材的双层等温球化退火热处理设备，其特征在于：所述循环风机的风机叶轮水平的设置在进气口处；所述的循环风机具有两个出风口，且位于相对两侧，所述的导流管包括分别将所述的出风口与所述排气管道的两端部相连通的支管；
    所述导流管和所述排气管道形成一组循环气流管路，所述上冷却单元具有共用一个所述循环风机的多组所述循环气流管路；
    所述的上炉辊组和下炉辊组的炉辊上下对齐设置，多组所述循环气流管路与位于所述中冷区的多根所述炉辊相错开设置，自所述的排气管道排出的气流直接流向所述下炉辊组上的轴承钢棒管材进行换热；
    所述的排气管道包括位于所述下炉辊组下方且两端部分别与所述支管相连通的管体、设置在所述管体上且能够将热气直接排向所述下炉辊组上的轴承钢棒管材进行换热的排气孔，所述的排气孔有多个，且沿着位于所述炉体内所述管体长度方向均匀间隔分布；
    所述的排气管道还包括分别与每个所述排气孔连通，且将气流导向轴承钢棒管材的气流支管；
    所述的换热管有多根，所述的下冷却单元还包括用于将所述风机的出风口与多根所述换热管相连通的送风管路、以及将多根所述换热管与所述排气管相连通的出风管路；所述的送风管路包括用于将多根所述换热管进风端部相连通的串接管、用于将所述串接管与所述风机出风口相连通的通气主管；所述的出风管路包括将多根所述换热管出风端部相连通的连通管，其中所述排气管的进气端部与所述连通管相连通；
    所述的炉体内上下两层之间相互连通的；
    所述的热处理设备还包括设置在所述的炉体进出口处的门帘密封、以及分别设置在所述炉体的进出料段且用于将该段所述上炉辊组和所述下炉辊组间隔开的隔板。
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