Vertical sintering furnace

Abstract

The vertical sintering furnace comprises a furnace body and a material transferring device, a heat insulation valve device capable of being opened and closed is arranged in the furnace body, the heat insulation valve device divides an inner cavity of the furnace body into a heating cavity and a cooling cavity which are vertically distributed, and a heating device is arranged in the heating cavity and / or the position, corresponding to the heating cavity, of the furnace body. A first cooling device used for directionally cooling the materials from the bottoms of the materials is arranged in the cooling cavity, and the material transferring device is arranged in the furnace body in a vertical lifting mode and used for conveying the materials between the heating cavity and the cooling cavity. According to the vertical sintering furnace, the inner cavity of the furnace body is divided into the heating cavity and the cooling cavity through the heat insulation valve device, materials can be rapidly transferred into the cooling cavity provided with the cooling device for directional cooling after heat preservation is finished, the cooling speed is high, the production efficiency can be improved, the problems of shrinkage cavities and shrinkage porosity can be avoided through directional cooling, and the service life of the vertical sintering furnace is prolonged. The sintering quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of metallurgical equipment, and particularly to a vertical sintering furnace. Background Art

[0002] A sintering furnace is a special equipment that enables powder compacts to obtain the required physical and mechanical properties as well as microstructures through sintering. Sintering furnaces can be divided into horizontal sintering furnaces and vertical sintering furnaces according to the placement method of the furnace body. Compared with horizontal sintering furnaces, vertical sintering furnaces vertically place the forming die with a copper-tungsten head and a copper tail in the vertical sintering furnace cavity for overall sintering. The copper-tungsten integral contact has good uniformity of organization and performance in the circumferential direction and high bonding strength.

[0003] In existing vacuum vertical sintering furnaces, through the upper feeding and discharging method or the lower feeding and discharging method, a graphite crucible containing a copper-tungsten alloy blank or a copper-tungsten alloy and copper is placed on the loading platform of the vertical sintering furnace. The material is moved to a suitable position inside the furnace body by a feeding mechanism, the furnace door is closed and evacuated for infiltration sintering, and after sintering, it is cooled to a preset temperature and then taken out by the feeding mechanism.

[0004] However, existing vacuum vertical sintering furnaces adopt the method of cooling with the furnace, that is, each stage in the sintering process - heating, heat preservation, cooling, and cooling is completed in one furnace cavity. The cooling time is long, which affects the production efficiency, and the material cannot be directionally cooled, easily resulting in shrinkage cavity and shrinkage porosity problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a vertical sintering furnace, so that it can shorten the cooling time, improve the production efficiency, and achieve directional cooling of the material to avoid the generation of shrinkage cavity and shrinkage porosity problems.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A vertical sintering furnace, comprising:

[0008] A furnace body, in which an openable and closable heat insulation flap device is arranged. The heat insulation flap device divides the inner cavity of the furnace body into an upper and a lower distributed heating cavity and a cooling cavity. A heating device is arranged in the heating cavity and / or at a position of the furnace body corresponding to the heating cavity. A first cooling device for directionally cooling the material from the bottom of the material is arranged in the cooling cavity;

[0009] A material transfer device, which is arranged in the furnace body so as to be able to move up and down, and is used for transporting materials between the heating cavity and the cooling cavity.

[0010] In an embodiment of the present application, the furnace body includes an upper furnace shell and a lower furnace shell connected in sequence from top to bottom. The heat insulation valve device is arranged at the lower end of the upper furnace shell. When the heat insulation valve device is in a closed state, the heat insulation valve device and the upper furnace shell enclose the heating chamber, and the heat insulation valve device and the lower furnace shell enclose the cooling chamber;

[0011] The lower furnace shell includes a connecting sleeve and a lower cover. The connecting sleeve is connected to the lower end of the upper furnace shell, and the lower cover is arranged below the connecting sleeve in a vertically liftable manner through an opening and closing driving device;

[0012] When the lower cover is in the upper limit position, the connecting sleeve and the lower cover enclose the cooling chamber. When the lower cover is in the lower limit position, a material taking and placing opening for material to enter and exit is formed between the connecting sleeve and the lower cover.

[0013] In an embodiment of the present application, the first cooling device includes a water-cooled plate and a cooling water circulation system. The water-cooled plate is arranged in the lower cover and is used for directionally cooling the material below the material. A water-cooling channel is arranged in the water-cooled plate, and the water-cooling channel is connected to the cooling water circulation system.

[0014] In an embodiment of the present application, the water-cooled plate is arranged in the lower cover through an elastic buffer device.

[0015] In an embodiment of the present application, the vertical sintering furnace further includes a second cooling device, and the second cooling device includes:

[0016] A first water-cooled interlayer arranged on at least one of the connecting sleeve and the lower cover;

[0017] A second water-cooled interlayer arranged on the upper furnace shell;

[0018] The first water-cooled interlayer and the second water-cooled interlayer are respectively communicated with the cooling water circulation system.

[0019] In an embodiment of the present application, the material transfer device includes;

[0020] A first driving device arranged on the lower cover;

[0021] A support member, the support member includes a support shaft and a load-bearing platform. The lower end of the support shaft is connected to the driving end of the first driving device, and the upper end of the support shaft passes through the lower cover and the water-cooled plate and is connected to the load-bearing platform for carrying the material. The support shaft is in sliding and sealing fit with the lower cover.

[0022] In an embodiment of the present application, the first driving device includes:

[0023] A first rotating motor, disposed on the lower cover;

[0024] A first lead screw, disposed at a driving end of the first rotating motor;

[0025] A first slider support frame, threadedly engaged with the first lead screw and connected to a lower end of the support shaft.

[0026] In an embodiment of the present application, the support shaft includes a temperature-resistant hard tube and a graphite rod that are detachably connected in sequence from bottom to top, and a lumen of the temperature-resistant hard tube is connected to the cooling water circulation system.

[0027] In an embodiment of the present application, the loading platform is a graphite loading platform.

[0028] In an embodiment of the present application, the vertical sintering furnace further includes a support base, the furnace body is suspended above the ground through the support base, and an equipment pit for avoiding the material transfer device is provided on the ground below the furnace body.

[0029] In an embodiment of the present application, the heat insulation flap device includes:

[0030] Flap door panels, a plurality of the flap door panels are movably disposed in the upper furnace shell;

[0031] A limiting device, the limiting device is disposed in the upper furnace shell and above the flap door panels, and an opening for the loading platform to pass through is provided on the limiting device;

[0032] A flap driving device, the flap driving device is configured to drive each of the flap door panels to reciprocate between a closed position and an open position. When each of the flap door panels is in the closed position, each of the flap door panels is in sealing contact and cooperation with the limiting device, so that the upper furnace shell, the limiting device, and each of the flap door panels enclose the heating chamber, and each of the flap door panels encloses a through hole in sealing cooperation with the support shaft. When each of the flap door panels is in the open position, a gap not less than the opening is formed between each of the flap door panels to yield the opening.

[0033] In an embodiment of the present application, the flap driving device includes:

[0034] A second rotating motor, disposed outside the upper furnace shell;

[0035] A second lead screw, rotatably disposed outside the upper furnace shell and connected to a driving end of the second rotating motor;

[0036] The second slider support frame, with its first end in threaded engagement with the second lead screw and its second end passing through the wall of the upper furnace shell and extending into the upper furnace shell to be connected to the valve door panel, has a sliding and sealing fit between the second end of the second slider support frame and the wall of the upper furnace shell.

[0037] In an embodiment of the present application, a guiding and sealing device is provided on the wall of the upper furnace shell. The guiding and sealing device includes a guiding cylinder, a pressing member, a locking nut, and a sealing ring. The first end of the guiding cylinder communicates with the inner cavity of the upper furnace shell, and the second end is provided with a guiding hole for sliding fit with the second end of the second slider support frame. The wall of the guiding hole is provided with an annular limiting step surface facing the second end of the guiding cylinder. A locking nut is threadedly connected to the second end of the guiding cylinder. The sealing ring and the pressing member are sequentially arranged in the guiding hole along the direction from the first end to the second end of the guiding cylinder and sleeved on the second end of the second slider support frame. The locking nut is in threaded engagement with the second end of the guiding cylinder, and the sealing ring is pressed against the annular limiting step surface through the pressing member.

[0038] In an embodiment of the present application, the heat-insulating valve device further includes a support member, which is arranged in the upper furnace shell and located below the valve door panel to support the valve door panel.

[0039] In an embodiment of the present application, the opening and closing driving device includes:

[0040] A third rotating motor, fixedly arranged relative to the connecting sleeve;

[0041] A third lead screw, arranged at the driving end of the third rotating motor;

[0042] A third slider support frame, in threaded engagement with the third lead screw and connected to the lower cover.

[0043] It can be seen from the above technical solutions that the present invention discloses a vertical sintering furnace, which includes a furnace body and a material transfer device. Among them, a heat-insulating valve device that can be opened and closed is arranged in the furnace body. The heat-insulating valve device divides the inner cavity of the furnace body into an upper and a lower distributed heating chamber and a cooling chamber. A heating device is arranged in the heating chamber and / or at the position of the furnace body corresponding to the heating chamber. A first cooling device for directionally cooling the material from the bottom of the material is arranged in the cooling chamber. The material transfer device is arranged in the furnace body so as to be able to move up and down, and the material transfer device is used to convey the material between the heating chamber and the cooling chamber. Of course, it should be noted that the vertical sintering furnace also includes a vacuum pumping device for pumping the heating chamber to vacuum before heating the material to be sintered.

[0044] During application, place the graphite crucible containing the material to be sintered on the material transfer device. The material transfer device sends the graphite crucible into the heating chamber, closes the heat insulation shutter device, evacuates the heating chamber, starts the heating device, raises the temperature in the heating chamber to a preset value and maintains the temperature. When the preset heat preservation time ends, the heat insulation shutter device opens, and the material transfer device sends the graphite crucible into the cooling chamber and places it on the first cooling device to start directional solidification. When the cooling reaches a certain temperature, reduce the vacuum value in the inner cavity of the furnace body, open the furnace body, and take out the graphite crucible.

[0045] It can be seen that the above vertical sintering furnace divides the inner cavity of the furnace body into a heating chamber and a cooling chamber through the heat insulation shutter device, and can quickly transfer the material to the cooling chamber equipped with a cooling device for directional cooling after heat preservation. It not only has a fast cooling speed, can improve production efficiency, but also can avoid the generation of shrinkage cavities and porosity problems through directional cooling, and improve the sintering quality. Brief Description of the Drawings

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0047] Figure 1 It is the front view of the vertical sintering furnace provided by the embodiment of the present invention;

[0048] Figure 2 It is the side view of the vertical sintering furnace provided by the embodiment of the present invention;

[0049] Figure 3 It is the front view of the lower cover of the vertical sintering furnace provided by the embodiment of the present invention;

[0050] Figure 4 It is the side view of the lower cover of the vertical sintering furnace provided by the embodiment of the present invention;

[0051] Figure 5 It is the top view of the lower cover of the vertical sintering furnace provided by the embodiment of the present invention;

[0052] Figure 6 It is the structural schematic diagram of the support member of the vertical sintering furnace provided by the embodiment of the present invention;

[0053] Figure 7 It is the front view of the heat insulation shutter device of the vertical sintering furnace provided by the embodiment of the present invention;

[0054] Figure 8 It is the bottom view of the heat insulation shutter device of the vertical sintering furnace provided by the embodiment of the present invention;

[0055] Figure 9 The front view of the upper sleeve of the upper furnace shell of the vertical sintering furnace provided by the embodiment of the present invention;

[0056] Figure 10 The side view of the upper sleeve of the upper furnace shell of the vertical sintering furnace provided by the embodiment of the present invention;

[0057] Figure 11 The bottom view of the upper sleeve of the upper furnace shell of the vertical sintering furnace provided by the embodiment of the present invention.

[0058] In the figure:

[0059] 100 is the furnace body; 110 is the upper furnace shell; 111 is the upper cover; 112 is the upper sleeve; 120 is the lower furnace shell; 121 is the connecting sleeve; 122 is the lower cover; 100a is the heating cavity; 100b is the cooling cavity;

[0060] 200 is the heat insulation valve device; 210 is the valve door plate; 220 is the limiting device; 230 is the valve driving device; 231 is the second rotating motor; 232 is the second lead screw; 233 is the second slider support frame; 2331 is the driving rod; 2332 is the connecting rod; 240 is the guiding and sealing device; 241 is the guiding cylinder; 242 is the locking nut; 243 is the pressing member; 244 is the sealing ring; 250 is the through hole; 260 is the mounting member; 270 is the support member;

[0061] 300 is the heating device;

[0062] 400 is the first cooling device; 410 is the water-cooling plate; 420 is the elastic buffer device; 421 is the mounting seat; 422 is the support member; 423 is the buffer spring:

[0063] 500 is the material transfer device; 510 is the first driving device; 511 is the first rotating motor; 512 is the first lead screw; 513 is the first slider support frame; 520 is the support member; 521 is the support shaft; 5211 is the temperature-resistant hard pipe; 5212 is the graphite rod; 522 is the loading platform;

[0064] 600 is the support base; 610 is the support platform; 620 is the support column;

[0065] 700 is the equipment pit;

[0066] 800 is the vacuum pumping device;

[0067] 900 is the opening and closing driving device; 910 is the third rotating motor; 920 is the third lead screw; 930 is the third slider support frame; 940 is the fourth lead screw; 950 is the fourth slider support frame. Detailed implementation manners

[0068] The core of the present invention is to provide a vertical sintering furnace. The structural design of this vertical sintering furnace enables it to shorten the cooling time, improve production efficiency, and achieve directional cooling of materials, thereby avoiding the occurrence of shrinkage cavities and shrinkage porosity problems.

[0069] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0070] Please refer to Figure 1 and Figure 2 , Figure 1 is the front view of the vertical sintering furnace provided by the embodiment of the present invention, Figure 2 is the side view of the vertical sintering furnace provided by the embodiment of the present invention.

[0071] An embodiment of the present invention discloses a vertical sintering furnace, which includes a furnace body 100 and a material transfer device 500.

[0072] Among them, an openable and closable heat insulation shutter device 200 is arranged in the furnace body 100. The heat insulation shutter device 200 divides the inner cavity of the furnace body 100 into a heating chamber 100a and a cooling chamber 100b which are distributed up and down. Of course, it should be noted that the up and down distribution of the heating chamber 100a and the cooling chamber 100b can be that the heating chamber 100a is arranged above the cooling chamber 100b, or the cooling chamber 100b is arranged above the heating chamber 100a, which is not limited herein. In a specific embodiment of the present application, as Figure 1 shown, the heating chamber 100a is arranged above the cooling chamber 100b.

[0073] One or more heat insulation shutter devices 200 can be arranged. When multiple heat insulation shutter devices 200 are arranged, each heat insulation shutter device 200 is arranged in sequence from top to bottom to improve the heat insulation effect between the heating chamber 100a and the cooling chamber 100b. The shutter door panel of the heat insulation shutter device can be made of a material with good heat insulation effect, or a cooling device can be arranged in the shutter door panel to reduce the heat exchange between the heating chamber 100a and the cooling chamber 100b. In a specific embodiment of the present application, one heat insulation shutter device 200 is arranged.

[0074] A heating device 300 is provided inside the heating chamber 100a and / or at a position on the furnace body 100 corresponding to the heating chamber 100a. That is, the heating device 300 can be provided inside the furnace wall of the furnace body 100, or can be provided at a position close to the furnace wall inside the heating chamber 100a. A first cooling device 400 for directionally cooling the material from the bottom of the material is provided inside the cooling chamber 100b. Of course, in addition to the first cooling device 400, in order to make the temperature inside the cooling chamber 100b controllable as a whole, other cooling devices can also be provided inside the cooling chamber 100b and / or at a position on the furnace body 100 corresponding to the cooling chamber 100b to achieve overall control of the temperature inside the cooling chamber 100b.

[0075] The material transfer device 500 is provided in the furnace body 100 so as to be able to move up and down. The material transfer device 500 is used to transfer the material between the heating chamber 100a and the cooling chamber 100b. The material refers to the powder compact to be sintered. Of course, it should be noted that the vertical sintering furnace also includes a vacuum pumping device 800 for pumping the heating chamber 100a to vacuum before heating the material to be sintered.

[0076] In application, place the graphite crucible containing the material to be sintered on the material transfer device 500. The material transfer device 500 sends the graphite crucible into the heating chamber 100a, closes the heat insulation shutter device 200, pumps the heating chamber 100a to vacuum, starts the heating device 300, makes the temperature inside the heating chamber 100a reach the preset value and keeps it warm. When the preset heat preservation time ends, the heat insulation shutter device 200 is opened, and the material transfer device 500 sends the graphite crucible into the cooling chamber 100b and places it on the first cooling device 400 to start directional solidification. When the cooling reaches a certain temperature, reduce the vacuum value of the inner cavity of the furnace body, open the furnace body, and take out the graphite crucible and the material thereon.

[0077] Compared with the prior art, the vertical sintering furnace provided by the embodiment of the present invention divides the inner cavity of the furnace body into a heating chamber 100a and a cooling chamber 100b through the heat insulation shutter device, and can quickly transfer the material to the cooling chamber 100b provided with a cooling device for directional cooling after heat preservation. Not only is the cooling speed fast, the production efficiency can be improved, but also through directional cooling, the problems of shrinkage cavity and shrinkage porosity can be avoided, and the sintering quality can be improved.

[0078] Such as Figure 1 and Figure 2As shown, in an embodiment of the present application, the furnace body 100 includes an upper furnace shell 110 and a lower furnace shell 120 connected in sequence from top to bottom. The upper furnace shell 110 includes an upper sleeve 112 and an upper cover 111 provided at the top end of the upper sleeve 112. The upper sleeve 112 is a cylindrical structure open at both the upper and lower ends and closed circumferentially. The upper cover 111 is provided at the upper end of the upper sleeve 112 to close the upper opening of the upper sleeve 112, forming the upper furnace shell 110 open at the lower end. The heat insulation valve device 200 is provided at the lower end of the upper furnace shell 110, or at the upper end of the lower furnace shell 120, or the heat insulation valve device 200 can be provided between the upper furnace shell 110 and the lower furnace shell 120. When the heat insulation valve device 200 is in the closed state, the heat insulation valve device 200 and the upper furnace shell 110 enclose a heating chamber 100a, and the heat insulation valve device 200 and the lower furnace shell 120 enclose a cooling chamber 100b, that is, the heating chamber 100a is located above the cooling chamber 100b.

[0079] The lower furnace shell 120 includes a connecting sleeve 121 and a lower cover 122. The connecting sleeve 121 is a cylindrical structure open at both the upper and lower ends and closed circumferentially. The upper opening of the connecting sleeve 121 is connected to the lower opening of the upper sleeve 112. The lower cover 122 is arranged below the connecting sleeve 121 in a vertically movable manner through an opening and closing driving device 900 to close or open the lower opening of the connecting sleeve 121.

[0080] The opening and closing driving device 900 is used to drive the lower cover 122 to move up and down relative to the connecting sleeve 121 to a suitable position. Since in this embodiment, the heating chamber 100a is arranged above the cooling chamber 100b, when the lower cover 122 moves towards the heating chamber 100a to the limit position, that is, when the lower cover 122 is in the upper limit position, the connecting sleeve 121 and the lower cover 122 enclose the cooling chamber 100b. When the lower cover 122 moves away from the heating chamber 100a to the limit position, that is, when the lower cover 122 is in the lower limit position, a loading and unloading port for the material to enter and exit is formed between the connecting sleeve 121 and the lower cover 122 to realize the opening and closing of the furnace body 100 and provide convenient conditions for loading and unloading materials.

[0081] As Figures 3 to 5As shown in the figure, the first cooling device 400 includes a water-cooled plate 410 and a cooling water circulation system. The water-cooled plate 410 is disposed within the lower cover 122, that is, the water-cooled plate 410 can move with the lower cover 122. The water-cooled plate 410 is used to directionally cool the material below the material. A water-cooling channel is provided within the water-cooled plate 410, and the water-cooling channel is connected to a cooling water circulation system (not shown in the figure). The cooling water circulation system circulates and supplies cooling water to the water-cooling channel within the water-cooled plate 410 to reduce the temperature of the water-cooled plate 410 and achieve directional cooling of the material. Therefore, the water-cooled plate 410 should be made of a material with high temperature resistance and good thermal conductivity to facilitate heat exchange between the cooling water and the graphite crucible and the material thereon.

[0082] The water-cooled plate 410 is provided with a channel that axially penetrates the water-cooled plate 410 for the material transfer device 500 to pass through.

[0083] To further optimize the above technical solution, in order to reduce the collision between the material transfer device 500 and the water-cooled plate 410, in an embodiment of the present application, the water-cooled plate 410 is disposed within the lower cover 122 through an elastic buffer device 420. The elastic buffer device 420 can not only reduce the collision between the material transfer device 500 and the water-cooled plate 410, but also provide a certain elastic force to make the water-cooled plate 410 in close contact with the load platform 522 of the material transfer device 500, improving the heat exchange and cooling effect.

[0084] Please refer to Figure 3 and Figure 4 , the elastic buffer device 420 includes a mounting seat 421, a support member 422, and a buffer spring 423. Among them, the mounting seat 421 is fixed within the lower cover 122. The upper end of the support member 422 is connected to the water-cooled plate 410, and the lower end is slidably engaged with the mounting seat 421. The buffer spring 423 is disposed between the mounting seat 421 and the water-cooled plate 410.

[0085] Please continue to refer to Figure 3 and Figure 4 , in a specific embodiment, the mounting seat 421 includes two symmetrically arranged channel steels. A gap for the material transfer device 500 to pass through is formed between the two channel steels. The channel steel includes a first side wall, and second and third side walls connected to both side edges of the first side wall. Among them, the second side wall is fixedly connected to the lower cover 122, and the third side wall cooperates with the support member 422 and the buffer spring 423.

[0086] The first end of the support member 422 is connected to the lower surface of the water-cooled plate 410. The second end passes through the third side wall of the channel steel and extends into the space enclosed by the first side wall, the second side wall, and the third side wall of the channel steel. And a limiting boss for cooperating with the third side wall is provided at the second end of the support member 422. The limiting boss is used to cooperate with the surface of the third side wall facing the second side wall to prevent the support member 422 from detaching from the mounting seat 421.

[0087] The buffer spring 423 is a compression spring, which is sleeved outside the support member 422. The first end of the buffer spring 423 abuts against the lower surface of the water-cooled disc 410, and the other end abuts against the surface of the third side wall of the channel steel facing away from the second side wall. Of course, the buffer spring 423 is not limited to a compression spring, and other forms of springs can also be used as long as they can elastically support the water-cooled disc 410.

[0088] To ensure the overall cooling effect of the cooling cavity 100b, the vertical sintering furnace further includes a second cooling device. The second cooling device includes a first water-cooled interlayer and a second water-cooled interlayer. Among them, the first water-cooled interlayer is arranged on at least one of the connecting sleeve and the lower cover, and the second water-cooled interlayer is arranged on the upper furnace shell. The first water-cooled interlayer and the second water-cooled interlayer are respectively communicated with the cooling water circulation system. The cooling water circulation system drives the cooling water to pass through the first water-cooled interlayer and the second water-cooled interlayer to control the temperature of the cooling cavity 100b.

[0089] The material transfer device 500 includes a first driving device 510 and a support member 520. Among them, the first driving device 510 is arranged on the lower cover 122. The support member 520 includes a support shaft 521 and a load platform 522. The lower end of the support shaft 521 is connected to the driving end of the first driving device 510. The upper end of the support shaft 521 passes through the lower cover 122 and the water-cooled disc 410 to connect the load platform 522 for carrying materials. The support shaft 521 is in sliding and sealing fit with the lower cover 122. The first driving device 510 is used to drive the support member 520 to reciprocate relative to the lower cover 122 and the water-cooled disc 410 to realize the transfer of materials between the cooling cavity 100b and the heating cavity 100a.

[0090] Specifically, as Figure 2 and Figure 6 shown, the first driving device 510 includes a first rotating motor 511, a first lead screw 512 and a first slider support frame 513. Among them, the first rotating motor 511 is arranged on the lower cover 122, the first lead screw 512 is arranged on the driving end of the first rotating motor 511, the first slider support frame 513 is in threaded fit with the first lead screw 512 and is connected to the lower end of the support shaft 521. The first rotating motor 511 drives the first lead screw 512 to rotate. The first slider support frame 513 and the first lead screw 512 form a lead screw pair. As the first lead screw 512 rotates, the first slider support frame 513 reciprocates axially along the first lead screw 512.

[0091] Of course, it should be noted that the first driving device 510 in the above embodiment is only a preferred implementation provided by the present application. In other embodiments, the first driving device 510 can also adopt a chain mechanism, a belt pulley mechanism, etc., which are not limited herein.

[0092] AsFigure 6 As shown, in an embodiment of the present application, the support shaft 521 includes a heat-resistant hard tube 5211 and a graphite rod 5212 that are detachably connected in sequence from bottom to top. The lumen of the heat-resistant hard tube 5211 is connected to a cooling water circulation system, and the cooling water circulation system is connected to drive the cooling water to flow in the lumen of the heat-resistant hard tube 5211 to reduce the temperature of the heat-resistant hard tube 5211 and prevent the temperature in the heating chamber 100a from being transferred to the cooling chamber 100b through the heat-resistant hard tube 5211.

[0093] It can be foreseen that the load platform 522 needs to withstand high temperatures in the heating chamber 100a and, when cooling the material, needs to enter the cooling chamber 100b to contact the water-cooled plate 410. Therefore, the load platform 522 needs to repeatedly withstand large temperature differences, so the load platform 522 is a graphite load platform.

[0094] As Figure 1 and Figure 2 shown, the vertical sintering furnace further includes a support base 600. The furnace body 100 is suspended above the ground through the support base 600. An equipment pit 700 for avoiding the material transfer device 500 is provided on the ground below the furnace body 100. The above-mentioned equipment pit 700 is used to accommodate the material transfer device 500 when the lower furnace shell 120 is opened, so that the lower cover 122 can be as close to the ground as possible to facilitate the picking and placing of materials.

[0095] As Figure 1 and Figure 2 shown, the above-mentioned support base 600 adopts a frame structure and is composed of multiple support columns 620 and a support platform 610 provided at the top of each support column 620. The upper furnace shell 110 and / or the lower furnace shell 120 are supported on the support platform 610, and the lower ends of each support column 620 are fixed to the ground.

[0096] Please refer to Figures 7 to 11, the heat insulation valve device 200 includes a valve plate 210, a limit device 220 and a valve driving device 230. Among them, multiple valve plates 210 are movably arranged in the upper furnace shell 110. The moving modes of the valve plates 210 include translation, rotation, etc. In this application, the moving mode of the valve plates 210 is translational movement along the direction perpendicular to the axis of the furnace body 100. The limit device 220 is arranged in the upper furnace shell 110 and above the valve plates 210 to perform translational limit on the valve plates 210 during the translation process of the valve plates 210 and maintain the stability of the valve plates 210. An opening for the loading platform to pass through is provided on the limit device 220. The valve driving device 230 is used to drive each valve plate 210 to reciprocate between a closed position and an open position. When each valve plate 210 is in the closed position, each valve plate 210 is in sealing contact and cooperation with the limit device 220, so that the upper furnace shell 110, the limit device 220 and each valve plate 210 enclose a heating chamber 100a, and each valve plate 210 encloses a through hole 250 that is in sealing cooperation with the support shaft 521. When each valve plate 210 is in the open position, a gap not less than the opening is formed between each valve plate 210 to yield the opening.

[0097] The valve plate 210 adopts a sector structure. When the heat insulation valve device 200 includes 2 valve plates 210, the valve plate 210 is a semi-circular plate, that is, a sector plate with a central angle of 180°. When the heat insulation valve device 200 includes 3 valve plates 210, the valve plate 210 is a sector plate with a central angle of 120°. Of course, the heat insulation valve device 200 can also include 4, 5 or even more valve plates 210, and the central angle of the valve plate 210 also changes according to the above rules, and no further examples will be given here.

[0098] In a specific embodiment of this application, as Figure 11 shown, the limit device 220 has an annular structure and can be in sealing cooperation with each valve plate 210 to prevent gaps from appearing between the heat insulation valve device 200 and the upper furnace shell 110 when the heat insulation valve device 200 is closed.

[0099] Please refer to Figure 7 and Figure 8, the valve driving device 230 is used to drive the valve plate 210 to translate. In the embodiment of the present application, the valve driving device 230 includes a second rotating motor 231, a second lead screw 232, and a second slider support frame 233. Among them, the second rotating motor 231 is arranged outside the upper furnace shell 110, the second lead screw 232 is rotatably arranged outside the upper furnace shell 110 and connected to the driving end of the second rotating motor 231. The first end of the second slider support frame 233 is in threaded cooperation with the second lead screw 232, and the second end passes through the wall of the upper furnace shell and extends into the upper furnace shell to be connected to the valve plate 210. A sliding seal fit is formed between the second end of the second slider support frame 233 and the wall of the upper furnace shell 110. The second lead screw 232 and the second slider support frame 233 form a lead screw pair. When the second rotating motor 231 drives the second lead screw 232 to rotate, the second slider support frame 233 reciprocates axially along the second lead screw 232, thereby driving the valve plate 210 to translate.

[0100] Please continue to refer to Figure 7 , a guiding and sealing device 240 is arranged on the wall of the upper furnace shell 110. The guiding and sealing device 240 includes a guiding cylinder 241, a pressing member 243, a locking nut 242, and a sealing ring 244. Among them, the first end of the guiding cylinder 241 communicates with the inner cavity of the upper furnace shell 110, and the second end is provided with a guiding hole that slidably cooperates with the second end of the second slider support frame 233. The hole wall of the guiding hole is provided with an annular limiting step surface facing the second end of the guiding cylinder 241. The second end of the guiding cylinder 241 is threadedly connected with a locking nut 242. The sealing ring 244 and the pressing member 243 are sequentially arranged in the guiding hole along the direction from the first end to the second end of the guiding cylinder 241 and sleeved on the second end of the second slider support frame 233. The locking nut 242 is threadedly engaged with the second end of the guiding cylinder 241, and the pressing member 243 presses the sealing ring 244 against the annular limiting step surface, thereby realizing the sliding seal fit between the sealing ring 244 and the second end of the second slider support frame 233.

[0101] As Figure 7 shown, in a specific embodiment of the present application, the second slider support frame 233 includes a driving rod 2331 and a connecting rod 2332. Among them, the first end of the driving rod 2331 serves as the first end of the second slider support frame 233 and is in threaded cooperation with the second lead screw 232. The second end of the driving rod 2331 is fixedly connected to the first end of the connecting rod 2332. The second end of the connecting rod 2332 serves as the second end of the second slider support frame 233 and passes through the above-mentioned guiding and sealing device 240 to be connected to the valve plate 210.

[0102] Please continue to refer to Figure 7, in order to provide an installation position and support for the above-mentioned valve driving device 230, an installation member 260 is further provided outside the upper sleeve 112. The second rotating motor 231 is disposed on the installation member 260, and the second lead screw 232 is rotatably disposed on the installation member 260 and is in transmission connection with the second rotating motor 231.

[0103] In order to further improve the stability of the valve plate 210 during movement, as Figures 9 to 11 shown, the heat insulation valve device 200 further includes a support member 270. The support member 270 is disposed in the upper furnace shell 110 and below the valve plate 210 to support the valve plate 210. It should be noted that the support member 270 should avoid the movement path of the material transfer device 500. In Figures 7 to 9 the illustrated embodiment, two support members 270 are provided. The two support members 270 are parallel to each other, and the length direction of the support member 270 is parallel to the translation direction of the valve plate 210. In this way, during the entire movement of the valve plate 210, the support member 270 can effectively support the valve plate 210.

[0104] Please refer to Figure 2 , in a specific embodiment of the present application, the opening and closing driving device 900 includes a third rotating motor 910, a third lead screw 920, and a third slider support frame 930. Among them, the third rotating motor 910 is fixedly disposed relative to the connecting sleeve 121. In Figure 2 the illustrated embodiment, the third rotating motor 910 is disposed on the support platform of the support base 600. Of course, the third rotating motor 910 can also be directly fixed on the connecting sleeve 121 or the upper sleeve 112. The third lead screw 920 is disposed at the driving end of the third rotating motor 910. The third slider support frame 930 is in threaded cooperation with the third lead screw 920. A lead screw pair is formed between the third slider support frame 930 and the third lead screw 920, and the third slider support frame 930 is connected to the lower cover 122. When the third rotating motor 910 drives the third lead screw 920 to rotate, the third slider support frame 930 reciprocates along the axial direction of the third lead screw 920 to drive the opening and closing of the lower cover 122.

[0105] To further optimize the above technical solution, to ensure the stability of the lower cover 122 during the opening and closing process, the opening and closing drive device 900 further includes at least one fourth slider support frame 950 and at least one fourth lead screw 940. The fourth slider support frame 950 has substantially the same structure as the third slider support frame 930. The fourth slider support frame 950 is connected to the lower cover 122. The fourth slider support frame 950 and the third slider support frame 930 are arranged at intervals along the circumferential direction of the lower cover 122. The fourth lead screw 940 and the third lead screw 920 are arranged in parallel, and the fourth lead screw 940 is in threaded cooperation with the fourth slider support frame 950. A lead screw pair is formed between the fourth slider support frame 950 and the fourth lead screw 940. Thus, during the opening and closing process of the lower cover 122, the third rotary motor 910 drives the fourth lead screw 940 and the third lead screw 920 to rotate synchronously through the conversion connection. The fourth slider support frame 950 and the third slider support frame 930 move axially back and forth synchronously along the fourth lead screw 940 and the third lead screw 920 respectively, so as to improve the stability of the lower cover 122.

[0106] Figure 1 and Figure 2 As described above, in an embodiment of the present application, the upper ends of the third lead screw 920 and the fourth lead screw 940 are connected to the upper support platform 610 of the support base 600, and the lower ends are fixed to the ground.

[0107] As shown in the present application and the claims, unless the context clearly indicates an exception, words such as "a", "an", "one", and / or "the" are not specifically singular and may also include plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. Elements defined by the statement "including one..." do not exclude the existence of other identical elements in the process, method, commodity, or device that includes the element.

[0108] In the description of the present application, unless otherwise clearly defined, words such as "set", "installed", and "connected" should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present application in combination with the specific content of the technical solution.

[0109] It should be noted that the embodiments in this specification are all described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0110] In this article, specific examples are used to illustrate the principles and implementation modes of the present invention. The description of the above embodiments is only used to help understand the core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A vertical sintering furnace, characterized in that, Comprising: A furnace body (100), within which an openable and closable heat insulation flap device (200) is provided. The heat insulation flap device (200) divides the inner cavity of the furnace body (100) into a vertically distributed heating chamber (100a) and a cooling chamber (100b). A heating device (300) is provided within the heating chamber (100a) and / or at a position of the furnace body (100) corresponding to the heating chamber (100a). A first cooling device (400) for directionally cooling the material from the bottom of the material is provided within the cooling chamber (100b); A material transfer device (500), which is vertically liftable and provided within the furnace body (100), and is used for transporting materials between the heating chamber (100a) and the cooling chamber (100b).

2. The vertical sintering furnace according to claim 1, wherein, The furnace body (100) includes an upper furnace shell (110) and a lower furnace shell (120) connected in sequence from top to bottom. The heat insulation flap device (200) is provided at the lower end of the upper furnace shell (110). When the heat insulation flap device (200) is in the closed state, the heat insulation flap device (200) and the upper furnace shell (110) enclose the heating chamber (100a), and the heat insulation flap device (200) and the lower furnace shell (120) enclose the cooling chamber (100b); The lower furnace shell (120) includes a connecting sleeve (121) and a lower cover (122). The connecting sleeve (121) is connected to the lower end of the upper furnace shell (110), and the lower cover (122) is vertically liftable below the connecting sleeve (121) through an opening and closing driving device (900); When the lower cover (122) is in the upper limit position, the connecting sleeve (121) and the lower cover (122) enclose the cooling chamber (100b). When the lower cover (122) is in the lower limit position, a loading and unloading opening for materials to enter and exit is formed between the connecting sleeve (121) and the lower cover (122).

3. The vertical sintering furnace according to claim 2, characterized in that, The first cooling device (400) includes a water-cooling plate (410) and a cooling water circulation system. The water-cooling plate (410) is provided within the lower cover (122) and is used for directionally cooling the material below the material. A water-cooling channel is provided within the water-cooling plate (410), and the water-cooling channel is connected to the cooling water circulation system.

4. The vertical sintering furnace according to claim 3, characterized in that The water-cooling plate (410) is provided within the lower cover (122) through an elastic buffer device (420).

5. The vertical sintering furnace according to claim 3, characterized in that, The vertical sintering furnace further includes a second cooling device, and the second cooling device includes: A first water-cooling interlayer provided in at least one of the connecting sleeve (121) and the lower cover (122); A second water-cooling interlayer provided in the upper furnace shell (110); The first water-cooling interlayer and the second water-cooling interlayer are respectively communicated with the cooling water circulation system.

6. The vertical sintering furnace according to any one of claims 3-5, characterized in that, The material transfer device (500) includes; A first driving device (510) provided on the lower cover (122); A support member (520), the support member (520) includes a support shaft (521) and a load platform (522), a lower end of the support shaft (521) is connected to a driving end of the first driving device (510), an upper end of the support shaft (521) passes through the lower cover (122) and the water-cooling plate (410) and is connected to the load platform (522) for carrying materials, and the support shaft (521) is in sliding and sealing fit with the lower cover (122).

7. The vertical sintering furnace according to claim 6, characterized in that, The first driving device (510) includes: A first rotating motor (511), arranged on the lower cover (122); A first lead screw (512), arranged on a driving end of the first rotating motor (511); A first slider support frame (513), in threaded fit with the first lead screw (512) and connected to a lower end of the support shaft (521).

8. The vertical sintering furnace according to claim 6, wherein The support shaft (521) includes a heat-resistant hard tube (5211) and a graphite rod (5212) which are detachably connected in sequence from bottom to top, and a lumen of the heat-resistant hard tube (5211) is connected to the cooling water circulation system.

9. The vertical sintering furnace according to claim 6, wherein The load platform (522) is a graphite load platform.

10. The vertical sintering furnace according to claim 6, characterized in that, The vertical sintering furnace further includes a support base (600), the furnace body (100) is suspended above the ground through the support base (600), and an equipment pit (700) for avoiding the material transfer device is arranged on the ground below the furnace body (100).

11. The vertical sintering furnace according to claim 6, wherein, The heat insulation flap device (200) includes: Flap door panels (210), a plurality of the flap door panels (210) are movably arranged in the upper furnace shell (110); A limiting device (220), the limiting device (220) is arranged in the upper furnace shell (110) and above the flap door panels (210), and an opening for the load platform to pass through is arranged on the limiting device (220); A flap door driving device (230), the flap door driving device (230) is used for driving each of the flap door panels (210) to reciprocate between a closed position and an open position. When each of the flap door panels (210) is in the closed position, each of the flap door panels (210) is in sealing contact and fit with the limiting device (220), so that the upper furnace shell (110), the limiting device (220) and each of the flap door panels (210) enclose the heating chamber (100a), and each of the flap door panels (210) encloses a through hole (250) in sealing fit with the support shaft (521). When each of the flap door panels (210) is in the open position, a gap not less than the opening is formed between each of the flap door panels (210) to yield the opening.

12. The vertical sintering furnace according to claim 11, wherein, The flap door driving device (230) includes: A second rotating motor (231), arranged outside the upper furnace shell (110); A second lead screw (232), rotatably arranged outside the upper furnace shell (110) and connected to a driving end of the second rotating motor (231); The second slider support frame (233) has its first end in threaded engagement with the second lead screw (232), and its second end passes through the wall of the upper furnace shell (110) and extends into the upper furnace shell (110) to be connected to the valve door panel (210). A sliding and sealing fit is provided between the second end of the second slider support frame (233) and the wall of the upper furnace shell (110).

13. The vertical sintering furnace according to claim 12, characterized in that, A guiding and sealing device (240) is provided on the wall of the upper furnace shell (110). The guiding and sealing device (240) includes a guiding cylinder (241), a pressing member (243), a locking nut (242), and a sealing ring (244). The first end of the guiding cylinder (241) communicates with the inner cavity of the upper furnace shell (110), and the second end is provided with a guiding hole that slidably cooperates with the second end of the second slider support frame (233). The wall of the guiding hole is provided with an annular limiting step surface facing the second end of the guiding cylinder (241). The second end of the guiding cylinder is threadedly connected with a locking nut (242). The sealing ring (244) and the pressing member (243) are sequentially arranged in the guiding hole along the direction from the first end to the second end of the guiding cylinder (241) and sleeved on the second end of the second slider support frame (233). The locking nut (242) is in threaded engagement with the second end of the guiding cylinder (241), and the sealing ring (244) is pressed against the annular limiting step surface through the pressing member (243).

14. The vertical sintering furnace according to claim 12, characterized in that, The heat-insulating valve device (200) further includes a support member (270). The support member (270) is arranged in the upper furnace shell (110) and is located below the valve door panel (210) to support the valve door panel (210).

15. The vertical sintering furnace according to any one of claims 2-5, characterized in that, The opening and closing driving device (900) includes: A third rotating motor (910), fixedly arranged relative to the connecting sleeve (121); A third lead screw (920), arranged at the driving end of the third rotating motor (910); A third slider support frame (930), in threaded engagement with the third lead screw (920) and connected to the lower cover (122).

Images