CN214218801U

CN214218801U - Controlled atmosphere spheroidizing annealing annular furnace

Info

Publication number: CN214218801U
Application number: CN202022255934.3U
Authority: CN
Inventors: 孙一凡
Original assignee: AICHELIN HEAT TREATMENT SYSTEMS (BEIJING) CO LTD
Current assignee: AICHELIN HEAT TREATMENT SYSTEMS (BEIJING) CO LTD
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2021-09-17
Anticipated expiration: 2030-10-12

Abstract

A controlled atmosphere spheroidizing annealing annular furnace, comprising: the device comprises an annular furnace body, a quick cooling chamber, a secondary heat exchange chamber, a transition chamber, a vacuum air exchange chamber and a loading and unloading platform; the annular furnace body is internally provided with an annular cavity, the bottom of the annular furnace body is provided with an annular rotating bottom, a plurality of stations are arranged on the upper side surface of the annular rotating bottom, the lower part of the annular rotating bottom is in driving connection with a rotating bottom driving device, the quick cooling chamber and the secondary heat exchange chamber are connected to two sides of the annular furnace body and are communicated with the annular cavity through a quick cooling port, a feeding port, a discharging port and a discharging port, the quick cooling chamber and the annular furnace body are both provided with a workpiece supporting and installing mechanism, the secondary heat exchange chamber is provided with a double-layer lifting platform and a circulating fan which can control lifting, the transition chamber, the vacuum air exchange chamber and the secondary heat exchange chamber are sequentially connected and are communicated through an exchange port provided with a heat insulation door and a transition port provided with a sealing door, a workpiece inlet and a workpiece outlet of the vacuum air exchange chamber are also provided with a sealing door and adjacent loading and unloading platforms, and the loading and unloading platforms are provided with workpiece push-pull devices to push and pull workpieces into or out of the vacuum air exchange chamber. Thereby reducing the occupation of operation space and the investment of operation cost.

Description

Controlled atmosphere spheroidizing annealing annular furnace

Technical Field

The utility model belongs to the technical field of the metal heat treatment technique and specifically relates to a controllable atmosphere spheroidizing annealing annular furnace.

Background

At present, a roller-hearth driving transmission structure is mostly adopted in continuous metal spheroidizing annealing equipment, as shown in fig. 1, that is, a workpiece 1 'is placed on a roller table formed by a row of rotating hearth rods 2', the workpiece 1 'translates in a furnace along with the rotation of the rods 2', and the process procedures of heating, fast cooling, spheroidizing, cooling and the like of the workpiece 1 'are sequentially completed along with the position change of the workpiece 1' in the furnace. The roller bottom type driving transmission structure needs to be provided with a large number of rotary roller rods 2 'in a sealing mode, not only is a large amount of expensive heat-resistant steel roller consumed, but also the roller rods 2' are easy to bend, deform and wear in operation, and the maintenance or replacement of the roller rods can delay the construction period. In addition, the continuous metal spheroidizing annealing equipment is of a linear structure, all process sections are connected in sequence, the structure not only occupies larger production operation space, but also needs facilities such as a material platform 3 'and a ventilation chamber 4' at the material loading end and the material unloading end, and the manufacturing, maintenance and operation cost is high.

In addition, the spheroidizing annealing of metals has higher heat capacity after being heated, and a large amount of heat energy released by subsequent air cooling and water cooling is not recovered and is wasted. Although there is a related application of the roller-hearth spheroidizing annealing furnace using cooling waste heat recently, as shown in fig. 2, two heat exchange channels 5 'are respectively connected to the front end and the rear end of the furnace body, so that the heat loss in the long distance of the heat exchange channels 5' is large, and each heat exchange channel 5 'needs an electric induced draft fan 6' for matching and guiding, which will also increase the energy consumption, thereby increasing the investment of the operation cost.

Therefore, how to design a metal spheroidizing annealing device which can effectively reduce the operation cost investment, reduce the operation space occupation and improve the waste heat utilization rate becomes one of the technical problems to be solved urgently in the field.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the technical scheme is how to provide the metal spheroidizing annealing equipment which can effectively reduce the manufacturing, maintenance and operation cost, occupies less operation space and has high waste heat utilization rate.

In order to solve the above technical problem, the present technical solution provides a controlled atmosphere spheroidizing annealing annular furnace, which comprises: the device comprises an annular furnace body, a quick cooling chamber, a secondary heat exchange chamber, a transition chamber, a vacuum air exchange chamber and a loading and unloading platform; the annular furnace body is internally provided with an annular cavity, the bottom of the annular cavity is provided with an annular rotary bottom, a plurality of stations are uniformly distributed on the upper side surface of the annular rotary bottom at intervals, the lower part of the annular rotary bottom is in driving connection with a rotary bottom driving device, and the rotary bottom driving device can drive the annular rotary bottom to rotate along the circumferential direction; the quick cooling chamber and the secondary heat exchange chamber are respectively connected with the outer sides of the outer ring walls at two sides of the annular furnace body and are respectively communicated with the annular cavity through a quick cooling port and a feed and discharge port; the secondary heat exchange chamber is provided with a double-layer lifting platform, a lifting driving device and a circulating fan, the lifting driving device can drive the double-layer lifting platform to ascend or descend, and the circulating fan is arranged at the top of the secondary heat exchange chamber so as to enable airflow in the secondary heat exchange chamber to flow circularly; the transition chamber is connected with the outer side wall of the secondary heat exchange chamber and communicated with the secondary heat exchange chamber through an exchange port, and a heat insulation door capable of controlling opening and closing is arranged at the exchange port; the vacuum air exchange chamber is connected with the outer side wall of the transition chamber and communicated with the transition chamber through a transition port, and a sealing door capable of controlling opening and closing is arranged at the transition port; the transition chamber is also provided with a workpiece pushing and pulling mechanism so as to pull the workpiece into the transition chamber from the secondary heat exchange chamber or the vacuum scavenging chamber or push the workpiece into the secondary heat exchange chamber or the vacuum scavenging chamber from the transition chamber; the vacuum scavenging chamber is provided with a workpiece inlet and a workpiece outlet and is provided with a sealing door capable of controlling opening and closing, the workpiece inlet and the workpiece outlet are adjacent to the loading and unloading platform, and the loading and unloading platform pushes the workpiece into the vacuum scavenging chamber from the loading and unloading platform through a workpiece push-pull device or pulls the workpiece out of the vacuum scavenging chamber onto the loading and unloading platform. In view of the above, this technical scheme is traditional "linear" furnace body structure innovation as annular furnace body structure, has greatly reduced occupation of operating space when keeping process sections such as heating, fast cooling, balling and cooling, has reduced the quantity that sets up of facilities such as loading and unloading platform and scavenging chamber moreover, in addition, has replaced the application of traditional stove bottom club with the station of laying in the annular furnace body to this has reduced manufacturing cost's input, and has reduced the fault rate and the maintenance cost of furnace body, and has ensured the stable development of production operation. In addition, the structure of the annular furnace body and the secondary heat exchange chamber can effectively improve the waste heat utilization rate of the heated workpiece, so that the cold workpiece can be well preheated before being heated, the energy consumption and the operation cost are reduced, and the workpiece processing quality is improved.

As another implementation of the technical scheme, the rotary bottom driving device drives the annular rotary bottom to rotate clockwise or anticlockwise along the circumferential direction, and correspondingly, the annular cavity is sequentially divided into a furnace heat exchange area, a heating heat preservation area and an isothermal spheroidizing area along the clockwise or anticlockwise direction; the heat exchange area in the furnace is an area close to the material inlet and the material outlet, and lifting doors capable of controlling lifting are respectively arranged at two ends of the heat exchange area in the furnace; the heating and heat preservation area and the isothermal spheroidizing area are defined and separated on the right side or the left side of a station in front of the quick cooling through hole, and a plurality of heating elements are distributed in the heating and heat preservation area. The arrangement of the heat exchange area in the furnace in the annular furnace body can effectively improve the utilization rate of the waste heat of the processed workpiece, and the processed workpiece is well cooled while the workpiece to be processed is well preheated; in addition, the process section can also enable the heating, quick cooling, spheroidizing and cooling processes of the workpiece to be circularly carried out in the annular furnace body without mutual interference, thereby not only improving the processing production efficiency of the workpiece, but also ensuring the processing quality of the workpiece.

In another implementation of the technical scheme, a heat exchange chamber circulating fan is arranged at the top of the end part of the heat exchange area in the furnace close to the isothermal spheroidizing area, an air deflector is transversely arranged below the heat exchange chamber circulating fan, a ventilation gap is arranged between the two end parts of the air deflector and the two lifting doors at intervals, and the air deflector divides the heat exchange area in the furnace into an upper circulating air channel at the upper part and a lower circulating air channel at the lower part. Therefore, when the processed workpiece is cooled, the rest heat can be effectively guided to the position of the cold workpiece, so that the heat exchange efficiency between the cold workpiece and the hot workpiece is improved.

As another implementation of this technical solution, an annular channel is opened at the bottom of the annular cavity, the annular rotary base is embedded in the annular channel, and the bottom of the annular rotary base has an annular seat protruding downward outside the annular furnace body, an annular bearing is provided at the lower part of the annular seat, teeth are provided on the inner annular surface or the outer annular surface of the annular bearing, the rotary base driving device is at least one driving motor, the output end of the driving motor is connected with a driving fluted disc through a speed reducer, the teeth on the driving fluted disc are engaged with the teeth of the annular bearing, so that the driving motor drives the annular bearing to drive the annular rotary base to rotate along the circumferential direction.

As another implementation of the technical solution, a plurality of radio frequency storage magnetic sheets are installed on the annular base, the positions of the radio frequency storage magnetic sheets correspond to the positions of a plurality of stations on the upper side surface of the annular rotary bottom one by one, at least one read-write station is fixedly installed below the annular furnace body, the read-write station is electrically connected with the driving motor correspondingly through the switch control unit, and the read-write station can identify the radio frequency signals on the radio frequency storage magnetic sheets so that the switch control unit controls the off-time and the on-time of the driving motor. Therefore, the stepping operation control can be conveniently carried out on the stations on the annular rotary bottom, and operators can conveniently know the operation progress condition of each station through the radio frequency signals read by the reading and writing station.

In another implementation of the technical scheme, the radio frequency storage magnetic sheet is an NFC card, the read-write station is an NFC card reader, and the switch control unit is a programmable logic controller.

As another implementation of the technical scheme, the station is formed by a plurality of refractory rod materials which are arranged on the upper side surface of the annular rotary bottom at intervals in a manner of being parallel to the diameter direction of the transverse section of the annular furnace body; this work piece holds in palm dress mechanism includes: the supporting mechanism shell is a sealing shell, one end of the supporting mechanism shell is provided with an opening, the side wall of the rapid cooling chamber opposite to the rapid cooling opening and the inner ring wall of the annular furnace body opposite to the material inlet and the material outlet are respectively provided with a material fork inlet and a material fork outlet, the supporting mechanism shells of the two workpiece supporting mechanisms are respectively positioned at the outer sides of the material fork inlet and the material fork outlet of the rapid cooling chamber and the material fork inlet of the annular furnace body and are respectively aligned and combined with the material fork inlet and the material fork outlet of the rapid cooling chamber and the material fork inlet of the annular furnace body by the opening, the pushing driving motor is fixedly arranged at the position, far away from the opening, of the outer side of the supporting mechanism shell, the output end of the pushing driving motor is in driving connection with one end part of the screw rod fixed in the supporting mechanism shell through a speed reducer, the material fork seat is provided with a screw hole and is correspondingly screwed with the screw rod through the screw hole so as to arrange the material fork seat on the screw rod, the material fork is arranged above the material fork seat and is respectively pivoted to the material fork and the material fork seat through two ends of a plurality of supporting connecting rods so that the material fork is movably connected with the material fork seat, the supporting driving motor is arranged on the supporting mechanism shell, the output end of the supporting driving motor is in driving connection with an eccentric cam arranged in the supporting mechanism shell through a chain, the material fork is horizontally arranged on a cam part of the eccentric cam, and the pushing driving motor drives a screw rod to rotate and the supporting driving motor drives the eccentric cam to rotate so as to push or withdraw and lift or put down the material fork, so that the material fork can support a workpiece from a station in the annular cavity into the quick cooling chamber and the secondary heat exchange chamber or support the workpiece from the quick cooling chamber and the secondary heat exchange chamber into the station in the annular cavity.

As another implementation of the technical scheme, each layer of the double-layer lifting platform is provided with a reloading station which is formed by a plurality of narrow roller beds which are arranged on the upper side surface of the lifting platform at intervals and uniformly in a direction parallel to the opening direction of the material inlet and outlet; the lifting driving device is a lifting driving motor and is arranged on the outer side of the secondary heat exchange chamber, and the lifting driving motor is connected with the double-layer lifting table through a chain; the two sides of the double-layer lifting platform are respectively provided with a guide part, and the two guide parts are embedded in guide rails at the two sides in the secondary heat exchange chamber; the inner sides of the guide rails on the two sides in the secondary heat exchange chamber are fixedly provided with vertical and upward air deflectors at the positions of the upper lifting platform, and the two sides of the upper side surface of the lower lifting platform are also fixedly provided with vertical and upward air deflectors. The arrangement of the air deflector can enable residual hot air flow guided by the circulating fan to flow in the secondary heat exchange chamber more uniformly, rapidly and regularly, so that the heat exchange efficiency between cold and hot workpieces is improved.

In another implementation of the present disclosure, the workpiece pushing and pulling device is installed in the middle of the loading and unloading platform, the workpiece pushing and pulling device divides the loading and unloading platform into a loading section and an unloading section, a workpiece to be processed is conveyed from the loading section to the workpiece pushing and pulling device and pushed into the vacuum air exchange chamber by the workpiece pushing and pulling device, and the processed workpiece is pulled out from the vacuum air exchange chamber by the workpiece pushing and pulling device and conveyed to the unloading section for unloading. Therefore, the loading and unloading operation can be realized simultaneously through one loading and unloading platform, so that the operation cost is reduced.

As another implementation of the technical scheme, a guide rail is laid between the loading and unloading platform and the secondary heat exchange chamber through the vacuum air exchange chamber and the transition chamber; the workpiece is loaded on the material tray, the material tray is in a grid hollow shape or a plate shape, the bottom of the material tray is provided with a downward flange, and the material tray is placed on the guide rail; the workpiece push-pull mechanism is formed by respectively arranging two workpiece push-pull devices on two side walls of the transition chamber opposite to the exchange port and the transition port; the workpiece push-pull device of the loading and unloading platform and the two workpiece push-pull devices of the transition chamber are respectively composed of a push-pull driving motor, a push-pull connecting rod, a material pushing end part, a clamping convex part and a clamping control unit, wherein the output end of the push-pull driving motor is connected with a chain wheel through a speed reducer, the chain wheel is connected with one end part of the push-pull connecting rod through a chain winding drive, the other end part of the push-pull connecting rod is fixedly combined with the L-shaped material pushing end part, the clamping convex part is pivoted on a lower side forward extension part of the material pushing end part, the clamping control unit is connected with the clamping convex part through a connecting rod in a driving way and can control the clamping convex part to be tilted up or leveled, the height of the upper extension part of the material pushing end part is higher than that of the bottom of a material tray arranged on the guide rail, the height of the lower side forward extension part of the material pushing end part is lower than that of the bottom of the material tray arranged on the guide rail, so that the push-pull driving motor can drive the upper extension part to push the material tray to move forward, or the lower side forward extension part of the pushing end part is inserted into the lower part of the bottom of the material tray, and the clamping convex part is tilted to clamp the mesh or the downward flange to pull back the material tray.

Drawings

FIG. 1 is a schematic view of a prior art continuous metal spheroidizing annealing apparatus;

FIG. 2 is a schematic diagram of a prior art roller-hearth spheroidizing annealing furnace using two heat exchange channels for waste heat application;

FIG. 3 is a schematic top view of the controlled atmosphere spheroidizing annealing annular furnace of the present invention;

FIG. 4 is a side sectional view of the controlled atmosphere spheroidizing annealing annular furnace of the present invention;

FIG. 5 is a side cross-sectional view of a heat exchange zone within the furnace of the present invention;

FIG. 6 is a schematic view of the RF storage disk of the present invention in cooperation with a read/write station;

fig. 7 is a side sectional view of the workpiece support mechanism of the present invention;

FIG. 8 is a schematic view of the secondary heat exchange chamber of FIG. 4 taken along line A-A;

FIG. 9 is a schematic view of the double-deck lift platform of FIG. 8 after it has been raised;

fig. 10 is a schematic view of the workpiece pushing and pulling device of the present invention pushing and pulling a workpiece;

fig. 11 is a schematic view of the workpiece pushing and pulling device according to the present invention.

Symbolic illustration in the drawings:

the prior art is illustrated by the reference symbols:

1' a workpiece; 2' a stick; a 3' material stage; 4' a ventilation chamber; a 5' heat exchange channel; 6' electric draught fan;

the utility model provides a mark symbol explains:

1, an annular furnace body; 11 an annular cavity; 111 a furnace heat exchange zone; 1111 heat exchange chamber circulation fan; 1112 air deflectors; 112 heating and holding area; 113 isothermal spheroidizing zone; 114 a lift gate; 12 an annular channel; 13, rotating the bottom in a ring shape; 14 stations; 15 an annular seat; 16 ring-shaped bearing; 17 a radio frequency storage magnetic sheet; 18 a read-write station; 19 a rotary bottom driving device; 2, a quick cooling chamber; 21, quick cooling through holes; 3 a secondary heat exchange chamber; 31 feeding and discharging ports; 32 double-layer lifting platforms; 33 a circulation fan; 34 a wind deflector; 35 an air deflector; 36 reloading stations; 4 a transition chamber; 41 an exchange port; 5, a vacuum air exchange chamber; a 51 transition port; 52 workpiece access; 6 loading and unloading material platform; 61, a feeding section; 62 a discharge section; 7, a workpiece push-pull device; 71 push-pull connecting rods; 72 pushing the end part; 721 lower front portion; 722 an upper side upper extension; 73 blocking convex parts; 8, a workpiece supporting and installing mechanism; 81 supporting and installing a mechanism shell; 82 opening the opening; 83 pushing the driving motor; 84 a screw rod; 85 material fork seats; 86 material forks; 87 a support link; 88 supporting the driving motor; 89 an eccentric cam; 9, workpiece; 10 material trays; 101 a downward flange; a furnace body bearing frame.

Detailed Description

The following detailed description and technical contents of the present invention are described with reference to the drawings, but the drawings are only for reference and illustration and are not intended to limit the present invention.

As shown in fig. 3 and 4, the ring furnace for controlled atmosphere spheroidizing annealing according to an embodiment of the present invention comprises: the device comprises an annular furnace body 1, a quick cooling chamber 2, a secondary heat exchange chamber 3, a transition chamber 4, a vacuum scavenging chamber 5 and a loading and unloading platform 6; the annular furnace body 1 is internally provided with an annular cavity 11, the bottom of the annular cavity 11 is provided with an annular rotary bottom 13, a plurality of stations 14 are uniformly distributed on the upper side surface of the annular rotary bottom 13 at intervals, the lower part of the annular rotary bottom 13 is in driving connection with a rotary bottom driving device 19, and the rotary bottom driving device 19 can drive the annular rotary bottom 13 to rotate along the circumferential direction; the fast cooling chamber 2 and the secondary heat exchange chamber 3 are respectively connected to the outer sides of the outer ring walls at two sides of the annular furnace body 1 and are respectively communicated with the annular cavity 11 through the fast cooling through hole 21 and the material inlet and outlet 31, the fast cooling chamber 2 and the annular furnace body 1 are respectively provided with a workpiece supporting and installing mechanism 8 so as to support and install the workpiece 9 into the fast cooling chamber 2 and the secondary heat exchange chamber 3 from a station 14 in the annular cavity 11 or support and install the workpiece 9 into the station 14 in the annular cavity 11 from the fast cooling chamber 2 and the secondary heat exchange chamber 3; the secondary heat exchange chamber 3 has a double-layer lifting platform 32, a lifting driving device (not shown) and a circulating fan 33, the lifting driving device can drive the double-layer lifting platform 32 to ascend or descend, the circulating fan 33 is installed at the top of the secondary heat exchange chamber 3 to make the airflow in the secondary heat exchange chamber 3 circularly flow; the transition chamber 4 is connected with the outer side wall of the secondary heat exchange chamber 3 and communicated with the secondary heat exchange chamber 3 through an exchange port 41, and a heat insulation door capable of controlling opening and closing is installed at the exchange port 41; the vacuum air exchanging chamber 5 is connected with the outer side wall of the transition chamber 4 and communicated with the transition chamber 4 through a transition port 51, and a sealing door capable of controlling opening and closing is installed at the transition port 51; in the present invention, the secondary heat exchange chamber 3 and the vacuum scavenging chamber 5 are connected to two adjacent side walls of the transition chamber 4, but the positions of the transition chamber and the vacuum scavenging chamber are not limited in the present invention; the transition chamber 4 is also provided with a workpiece pushing and pulling mechanism so as to pull the workpiece 9 into the transition chamber 4 from the secondary heat exchange chamber 3 or the vacuum scavenging chamber 5 or push the workpiece 9 into the secondary heat exchange chamber 3 or the vacuum scavenging chamber 5 from the transition chamber 4; the vacuum scavenging chamber 5 is provided with a workpiece access 52 and a sealing door capable of controlling opening and closing, the workpiece access 52 is adjacent to the loading and unloading platform 6, and the loading and unloading platform 6 pushes the workpiece 9 into the vacuum scavenging chamber 5 from the loading and unloading platform 6 or pulls the workpiece 9 out of the vacuum scavenging chamber 5 onto the loading and unloading platform 6 through the workpiece pushing and pulling device 7. In addition, the utility model discloses in, this controlled atmosphere spheroidizing annealing ring furnace can set up on the furnace body bears a frame A to the installation of each part combines, nevertheless the utility model discloses do not restrict to this.

More specifically, the present invention provides a rotary bottom driving device 19 for driving the annular rotary bottom 13 to rotate clockwise or counterclockwise along the circumferential direction, and correspondingly, the annular chamber 11 is sequentially divided into a furnace heat exchange region 111, a heating and heat preservation region 112 and an isothermal spheroidizing region 113 along the clockwise or counterclockwise direction, and the direction set by the functional region corresponds to the rotating direction of the annular rotary bottom 13; the heat exchange area 111 in the furnace is located in the area near the material inlet/outlet 31, and the two ends of the heat exchange area 111 in the furnace are respectively provided with a lifting door 114 capable of controlling lifting; the heat-preservation area 112 and the isothermal-spheroidization area 113 are defined and separated on the right side or the left side of the station 14 before the rapid-cooling port 21, wherein when the annular rotary base 13 rotates clockwise along the circumferential direction, the boundary between the heat-preservation area 112 and the isothermal-spheroidization area 113 is defined on the right side of the station 14 before the rapid-cooling port 21, and when the annular rotary base 13 rotates counterclockwise along the circumferential direction, the boundary between the heat-preservation area 112 and the isothermal-spheroidization area 113 is defined on the left side of the station 14 before the rapid-cooling port 21, and a plurality of heating elements (not shown) are distributed on the heat-preservation area 112 to heat the workpiece 9. In addition, as shown in fig. 5, a heat exchange chamber circulating fan 1111 is installed on the top of the end portion of the in-furnace heat exchange area 111 near the isothermal spheroidizing area 113, an air guiding plate 1112 is transversely installed below the heat exchange chamber circulating fan 1111, a ventilation gap is formed between the two end portions of the air guiding plate 1112 and the two lifting doors 114, and the air guiding plate 1112 divides the in-furnace heat exchange area 111 into an upper circulating air duct at the upper portion and a lower circulating air duct at the lower portion. The arrangement of the furnace heat exchange zone 111 in the annular furnace body 1 can effectively improve the utilization rate of the residual heat of the processed workpiece 9, and the processed workpiece 9 is well cooled while the workpiece 9 to be processed is well preheated; in addition, the process section can also enable the heating, quick cooling, spheroidizing and cooling processes of the workpiece 9 to be circularly carried out in the annular furnace body 1 without mutual interference, thereby not only improving the processing production efficiency of the workpiece 9, but also ensuring the processing quality of the workpiece 9. In the heat exchange area 111 inside the furnace, the heat exchange chamber circulation fan 1111 and the air guiding plate 1112 are disposed, so that the processed workpiece 9 can be cooled, and simultaneously, the rest heat can be effectively guided to the position of the cold workpiece 9, thereby improving the heat exchange efficiency between the cold and hot workpieces 9.

In the present invention, as shown in fig. 4, an annular groove 12 is disposed at the bottom of the annular cavity 11, an annular rotary bottom 13 is embedded in the annular groove 12, and the bottom of the annular rotary bottom 13 has an annular seat 15 protruding downwards outside the annular furnace body 1, an annular carrier 16 is disposed at the lower part of the annular seat 15, and teeth are disposed on the inner annular surface or the outer annular surface of the annular carrier 16, which is described in the present invention with teeth disposed on the outer annular surface; the bottom-rotating driving device 19 is at least one driving motor, the output end of the driving motor is connected with a driving fluted disc through a speed reducer, teeth on the driving fluted disc are meshed with teeth of the annular bearing 16, so that the driving motor drives the annular bearing 16 to drive the annular rotating bottom 13 to rotate along the circumferential direction, and the output power of the driving motor can be adjusted through a frequency converter (not shown), so that the rotating speed of the annular rotating bottom is adjusted. As shown in fig. 6, a plurality of rf storage magnetic sheets 17 are further mounted on the annular base 15, the positions of the rf storage magnetic sheets 17 correspond to the positions of the plurality of stations 14 on the upper side of the annular rotary base 13 one by one, at least one read-write station 18 is fixedly mounted below the annular furnace body 1, the read-write station 18 is electrically connected to the driving motor through a switch control unit (not shown), and the read-write station 18 can identify the rf signals on the rf storage magnetic sheets 17, so that the switch control unit controls the shutdown time and the startup time of the driving motor. The radio frequency storage magnetic sheet 17 may be an NFC card, the read-write station 18 may be an NFC card reader, and the switch control unit may be a programmable logic controller. Therefore, the stepping operation control of the stations 14 on the annular rotary bottom 13 can be facilitated, and an operator can know the operation progress condition of each station 14 through the radio frequency signals read by the read-write station 18 conveniently.

The utility model discloses in, this station 14 is by several fire-resistant rod material with be on a parallel with 1 transverse section diameter direction of annular furnace body and the interval just evenly lay in the side of going up of annular rotary hearth 13 and constitute, and this fire-resistant rod material can be made for fire-resistant materials such as carborundum material. As shown in fig. 7, the work mounting mechanism 8 includes: a supporting mechanism casing 81, a pushing driving motor 83, a screw 84, a material fork seat 85, a material fork 86, a plurality of supporting connecting rods 87, a supporting driving motor 88 and an eccentric cam 89, wherein the supporting mechanism casing 81 is a sealed casing and has an open port 82 at one end, as shown in fig. 4, a material fork inlet and outlet (not shown) is respectively arranged on the side wall of the rapid cooling chamber 2 opposite to the rapid cooling port 21 and the inner annular wall of the annular furnace body 1 opposite to the material inlet and outlet 31, the supporting mechanism casings 81 of the two workpiece supporting mechanisms 8 are respectively arranged at the outer sides of the material fork inlet and outlet of the rapid cooling chamber 2 and the annular furnace body 1 and are respectively aligned and combined with the material fork inlet and outlet of the rapid cooling chamber 2 and the material fork of the annular furnace body 1 through the open port 82, the pushing driving motor 83 is fixedly arranged at the position of the outer side of the supporting mechanism casing 81 far away from the open port 82, and the output end of the pushing driving motor 83 is connected with one end of the screw 84 fixed in the supporting mechanism casing 81 through a speed reducer, the material fork seat 85 is provided with a screw hole and is correspondingly screwed with the screw rod 84 through the screw hole so as to arrange the material fork seat 85 on the screw rod 84, two sides of the material fork seat 85 are embedded in slideways at two sides in the supporting mechanism shell 81, the material fork 86 is positioned above the material fork seat 85 and is respectively pivoted with the material fork 86 and the material fork seat 85 through two ends of a plurality of supporting connecting rods 87 so as to enable the material fork 86 to be movably connected with the material fork seat 85, the supporting driving motor 88 is arranged on the supporting mechanism shell 81, the output end of the supporting driving motor is in driving connection with an eccentric cam 89 arranged in the supporting mechanism shell 81 through a chain, the material fork 86 is horizontally arranged on a cam part of the eccentric cam 89, the screw rod 84 is driven to rotate through the pushing driving motor 83, the supporting driving motor 88 drives the eccentric cam 89 to rotate so as to push or withdraw and lift or put down the material fork 86, so that the material fork 86 can support the workpiece 9 from a station 14 in the annular cavity 11 into the quick cooling chamber 2 and the secondary heat exchange chamber 3, or the work piece 9 is loaded into the working position 14 in the annular cavity 11 from the quick cooling chamber 2 and the secondary heat exchange chamber 3.

In the present invention, as shown in fig. 8 and 9, each layer of the double-layer elevating platform 32 has a replacing station 36, and the replacing station 36 is formed by a plurality of narrow roller beds which are spaced and uniformly distributed on the upper side surface of the elevating platform in parallel to the opening direction of the material inlet/outlet 31; the lifting driving device is a lifting driving motor and is arranged on the outer side of the secondary heat exchange chamber, and the lifting driving motor is connected with the double-layer lifting table through a chain; both sides of the double-layer lifting platform 32 are provided with guide parts which are embedded in guide rails at both sides in the secondary heat exchange chamber 3; as shown in fig. 9, when the double-deck lifting platform 32 is driven to ascend, the position of the air deflector 34 on the upper deck does not change, and the air deflector 35 on the lower deck ascends with the ascending of the lifting platform. The arrangement of the air deflector can enable the residual heat airflow guided by the circulating fan 33 to flow in the secondary heat exchange chamber 3 more uniformly, rapidly and regularly, so as to improve the heat exchange efficiency between the cold workpiece on the upper layer and the hot workpiece on the lower layer.

The utility model discloses in, as shown in fig. 3, this work piece push-and-pull device 7 is installed in the middle part of handling material platform 6, this work piece push-and-pull device 7 separates handling material platform 6 for material loading section 61 and unloading section 62, work piece 9 of waiting to process is conveyed to work piece push-and-pull device 7 department and is pushed into to vacuum ventilation chamber 5 by work piece push-and-pull device 7, work piece 9 after the processing is pulled out and conveys to unloading section 62 from vacuum ventilation chamber 5 by work piece push-and-pull device 7, with this through the simultaneous operation of a handling material platform 6 alright realization material loading and unloading, in order to reduce the operation cost. A guide rail (not shown) is laid between the loading and unloading platform 6 and the secondary heat exchange chamber 3 through the vacuum air exchange chamber 5 and the transition chamber 4; referring to fig. 10 and 11, the workpiece 9 is loaded on a tray 10, the tray 10 is in a grid hollow shape or a plate shape and has a downward flange 101 at the bottom, and the tray 10 is placed on the guide rail; the workpiece push-pull mechanism is composed of two workpiece push-pull devices 7 respectively arranged on two side walls of the transition chamber 4 opposite to the exchange port 41 and the transition port 51. The workpiece push-pull device 7 of the loading and unloading platform 6 and the two workpiece push-pull devices 7 of the transition chamber 4 are composed of a push-pull driving motor (not shown), a push-pull connecting rod 71, a pushing end 72, a clamping convex part 73 and a clamping control unit (not shown), wherein the output end of the push-pull driving motor is connected with a chain wheel through a speed reducer, the chain wheel is connected with one end part of the push-pull connecting rod 71 through a rolling chain, the other end part of the push-pull connecting rod 71 is fixedly combined with the L-shaped pushing end 72, the clamping convex part 73 is pivoted on a lower front extension part 721 of the pushing end 72, the clamping control unit is connected with the clamping convex part 73 through a connecting rod in a driving way and can control the clamping convex part 73 to tilt up or to be flat, the height of an upper extension part 722 of the pushing end 72 is higher than the height of the bottom of a tray 10 arranged on the guide rail, the height of the lower front extension part 721 of the pushing end 72 is lower than the height of the bottom of the tray 10 arranged on the guide rail, so that the push-pull driving motor can drive the pushing end 72 to make the upper extending part 722 push the tray 10 forward, or make the lower extending part 721 of the pushing end 72 insert to the bottom of the tray 10 and make the locking protrusion 73 tilt up to lock the mesh or the downward flange 101 to pull back the tray 10.

Therefore, the utility model discloses with traditional "linear" furnace body structure innovation for annular furnace body structure, greatly reduced operating space's occupation when keeping process zones section such as heating, fast cold, balling and cooling, reduced the quantity that sets up of facilities such as loading platform and scavenge room moreover. In addition, the stations arranged in the annular furnace body replace the application of the traditional furnace bottom sticks, so that the investment of manufacturing cost is reduced, the failure rate and the maintenance cost of the furnace body are reduced, and the stable development of production operation is ensured. In addition, the structure of the annular furnace body and the secondary heat exchange chamber can effectively improve the waste heat utilization rate of the heated workpiece, so that the cold workpiece can be well preheated before being heated, the energy consumption and the operation cost are reduced, and the workpiece processing quality is improved.

Above only be the preferred embodiment of the utility model discloses a not be used for injecing the utility model discloses a patent range, other applications the utility model discloses an equivalent change that the patent design was done all should belong to the patent protection scope of the utility model.

Claims

1. A controlled atmosphere spheroidizing annealing annular furnace is characterized by comprising: the device comprises an annular furnace body, a quick cooling chamber, a secondary heat exchange chamber, a transition chamber, a vacuum air exchange chamber and a loading and unloading platform; the annular furnace body is internally provided with an annular cavity, the bottom of the annular cavity is provided with an annular rotary bottom, a plurality of stations are uniformly distributed on the upper side surface of the annular rotary bottom at intervals, the lower part of the annular rotary bottom is in driving connection with a rotary bottom driving device, and the rotary bottom driving device can drive the annular rotary bottom to rotate along the circumferential direction; the quick cooling chamber and the secondary heat exchange chamber are respectively connected with the outer sides of the outer ring walls at two sides of the annular furnace body and are respectively communicated with the annular cavity through a quick cooling port and a material inlet and outlet, and the quick cooling chamber and the annular furnace body are respectively provided with a workpiece supporting and installing mechanism so as to support and install a workpiece into the quick cooling chamber and the secondary heat exchange chamber from a working position in the annular cavity or support and install the workpiece into the working position in the annular cavity from the quick cooling chamber and the secondary heat exchange chamber; the secondary heat exchange chamber is provided with a double-layer lifting platform, a lifting driving device and a circulating fan, the lifting driving device can drive the double-layer lifting platform to ascend or descend, and the circulating fan is arranged at the top of the secondary heat exchange chamber so as to enable airflow in the secondary heat exchange chamber to flow circularly; the transition chamber is connected with the outer side wall of the secondary heat exchange chamber and communicated with the secondary heat exchange chamber through an exchange port, and a heat insulation door capable of controlling opening and closing is installed at the exchange port; the vacuum air exchange chamber is connected with the outer side wall of the transition chamber and communicated with the transition chamber through a transition port, and a sealing door capable of controlling opening and closing is installed at the transition port; the transition chamber is also provided with a workpiece pushing and pulling mechanism so as to pull the workpiece into the transition chamber from the secondary heat exchange chamber or the vacuum scavenging chamber or push the workpiece into the secondary heat exchange chamber or the vacuum scavenging chamber from the transition chamber; the vacuum scavenging chamber is provided with a workpiece inlet and outlet and is provided with a sealing door capable of controlling opening and closing, the workpiece inlet and outlet is adjacent to the loading and unloading platform, and the loading and unloading platform pushes the workpiece into the vacuum scavenging chamber from the loading and unloading platform through a workpiece push-pull device or pulls the workpiece out of the vacuum scavenging chamber onto the loading and unloading platform.

2. The controlled atmosphere spheroidizing annealing annular furnace according to claim 1, wherein the rotary bottom driving device drives the annular rotary bottom to rotate clockwise or counterclockwise along the circumferential direction, and correspondingly, the annular cavity is divided into a furnace heat exchange area, a heating heat preservation area and an isothermal spheroidizing area along the clockwise or counterclockwise direction in sequence; the heat exchange area in the furnace is positioned in the area close to the material inlet and the material outlet, and lifting doors capable of controlling lifting are respectively arranged at two ends of the heat exchange area in the furnace; the heating and heat preservation area and the isothermal spheroidizing area are defined and separated on the right side or the left side of a station in front of the quick cooling through hole, and a plurality of heating elements are distributed in the heating and heat preservation area.

3. The ring furnace for controlled atmosphere spheroidizing annealing according to claim 2, wherein a heat exchange chamber circulating fan is installed at the top of the end part of the heat exchange region in the furnace close to the isothermal spheroidizing region, an air deflector is transversely arranged below the heat exchange chamber circulating fan, a ventilation gap is arranged between the two end parts of the air deflector and the two lifting doors, and the air deflector divides the heat exchange region in the furnace into an upper circulating air channel at the upper part and a lower circulating air channel at the lower part.

4. The controlled atmosphere spheroidizing annealing annular furnace according to claim 1, wherein the annular cavity is provided at the bottom thereof with an annular channel, the annular rotary bottom is embedded in the annular channel, the bottom of the annular rotary bottom is provided with an annular seat protruding downwards outside the annular furnace body, the lower part of the annular seat is provided with an annular carrier, the inner annular surface or the outer annular surface of the annular carrier is provided with teeth, the rotary bottom driving device is at least one driving motor, the output end of the driving motor is connected with a driving fluted disc through a speed reducer, and the teeth on the driving fluted disc are engaged with the teeth of the annular carrier, so that the driving motor drives the annular carrier to drive the annular rotary bottom to rotate along the circumferential direction.

5. The controlled atmosphere spheroidizing annealing annular furnace according to claim 4, wherein a plurality of radio frequency storage magnetic sheets are arranged on the annular seat, the positions of the radio frequency storage magnetic sheets correspond to the positions of a plurality of stations on the upper side surface of the annular rotary bottom one by one, at least one read-write station is fixedly arranged below the annular furnace body, the read-write station is electrically connected with the driving motor correspondingly through a switch control unit, and the read-write station can recognize radio frequency signals on the radio frequency storage magnetic sheets so that the switch control unit controls the off-time and the on-time of the driving motor.

6. The controlled atmosphere spheroidizing annealing annular furnace according to claim 5, wherein the radio frequency storage magnetic sheet is an NFC card, the read-write station is an NFC card reader, and the switch control unit is a programmable logic controller.

7. The controlled atmosphere spheroidizing annealing annular furnace according to claim 1, wherein the station is composed of a plurality of refractory rod materials which are arranged on the upper side surface of the annular rotary bottom at intervals and uniformly in the diameter direction parallel to the transverse section of the annular furnace body; the work piece holds in the palm dress mechanism includes: the supporting mechanism shell is a sealing shell, one end of the supporting mechanism shell is provided with an opening, the rapid cooling chamber is opposite to the side wall of the rapid cooling opening, the annular furnace body is opposite to the inner ring wall of the material inlet and the material outlet, the supporting mechanism shells of the two workpiece supporting mechanisms are respectively positioned at the outer sides of the inlet and the outlet of the material fork of the rapid cooling chamber and the annular furnace body and are respectively combined with the inlet and the outlet of the material fork of the rapid cooling chamber and the inlet and the outlet of the material fork of the annular furnace body in an aligned mode through the opening, the pushing driving motor is fixedly arranged at the position, far away from the opening, of the outer side of the supporting mechanism shell, and the output end of the pushing driving motor is in driving connection with one end part of the screw rod fixed in the supporting mechanism shell through a speed reducer, the material fork seat is provided with a screw hole and is correspondingly screwed with the screw rod through the screw hole so as to be arranged on the screw rod, two sides of the material fork seat are embedded in slideways at two sides in the shell of the supporting mechanism, the material fork is positioned above the material fork seat and is respectively pivoted with the material fork and the material fork seat through two ends of a plurality of supporting connecting rods so as to be movably connected with the material fork seat, the supporting driving motor is arranged on the shell of the supporting mechanism, the output end of the supporting driving motor is in driving connection with an eccentric cam arranged in the shell of the supporting mechanism through a chain, the material fork is horizontally arranged on a cam part of the eccentric cam, the screw rod is driven to rotate through the pushing driving motor, the supporting driving motor drives the eccentric cam to rotate so as to push or withdraw the material fork and lift or put down the material fork, so that the material fork can support a workpiece from a station in the annular cavity to be arranged in the quick cooling chamber and the secondary hot cooling chamber And the exchange chamber or the work piece is supported into the work station in the annular cavity by the quick cooling chamber and the secondary heat exchange chamber.

8. The controlled atmosphere spheroidizing annealing annular furnace according to claim 7, wherein each layer of the double-layer lifting platform is provided with a reloading station, and the reloading station is formed by a plurality of narrow roller beds which are arranged on the upper side surface of the lifting platform at intervals and uniformly in a direction parallel to the opening direction of the material inlet and outlet; the lifting driving device is a lifting driving motor and is arranged on the outer side of the secondary heat exchange chamber, and the lifting driving motor is connected with the double-layer lifting table through a chain; the two sides of the double-layer lifting platform are respectively provided with a guide part, and the two guide parts are embedded in guide rails on the two sides in the secondary heat exchange chamber; the inner sides of the guide rails on the two sides in the secondary heat exchange chamber are fixedly provided with vertical and upward air deflectors at the positions of the upper lifting platform, and the two sides of the upper side surface of the lower lifting platform are also fixedly provided with vertical and upward air deflectors.

9. The controlled atmosphere spheroidizing annealing annular furnace according to claim 1, wherein the workpiece push-pull device is installed at the middle part of the loading and unloading platform, the workpiece push-pull device divides the loading and unloading platform into a loading section and a unloading section, the workpiece to be processed is conveyed from the loading section to the workpiece push-pull device and pushed into the vacuum scavenging chamber by the workpiece push-pull device, and the processed workpiece is pulled out from the vacuum scavenging chamber by the workpiece push-pull device and conveyed to the unloading section for unloading.

10. The controlled atmosphere spheroidizing annealing annular furnace according to claim 9, wherein a guide rail is laid between the loading platform and the secondary heat exchange chamber through the vacuum air exchange chamber and the transition chamber; the workpiece is loaded on a material tray, the material tray is in a grid hollow shape or a plate body shape, the bottom of the material tray is provided with a downward flange, and the material tray is placed on the guide rail; the workpiece push-pull mechanism is formed by respectively arranging two workpiece push-pull devices on two side walls of the transition chamber opposite to the exchange port and the transition port; the workpiece push-pull device of the loading and unloading platform and the two workpiece push-pull devices of the transition chamber are respectively composed of a push-pull driving motor, a push-pull connecting rod, a pushing end part, a clamping convex part and a clamping control unit, wherein the output end of the push-pull driving motor is connected with a chain wheel through a speed reducer, the chain wheel is connected with one end part of the push-pull connecting rod through a chain winding drive, the other end part of the push-pull connecting rod is fixedly combined with the L-shaped pushing end part, the clamping convex part is pivoted on a lower side forward extension part of the pushing end part, the clamping control unit is in driving connection with the clamping convex part through a connecting rod and can control the clamping convex part to tilt or flatten, the height of the upper extension part of the pushing end part is higher than the height of the bottom of a material tray arranged on the guide rail, and the height of the lower side forward extension part of the pushing end part is lower than the height of the bottom of the material tray arranged on the guide rail, so that the push-pull driving motor can drive the pushing end to enable the upper side forward extension part to push the tray to move forward, or the lower side forward extension part of the pushing end is inserted into the lower part of the bottom of the tray and enables the clamping convex part to tilt up to clamp the mesh or the lower flange to pull the tray back.