A method for using a nitrogen atmosphere protected sintering kiln

Abstract

The invention discloses a nitrogen atmosphere protection sintering kiln, which belongs to the field of kiln application technology. A nitrogen atmosphere protection sintering kiln includes a frame, an electric control box installed on the frame, a kiln box installed on the top of the frame, and a discharge transition box connected to the tail of the kiln box, and also includes a push plate isolation mechanism, which is arranged at the junction of the kiln box and the discharge transition box; a conveying track, which is installed on the bottom inner wall of the discharge transition box and extends into the kiln box; a movable loading part, which is slidably installed on the conveying track; an opening and closing sealed cabin mechanism, which is installed in the discharge transition box, and the opening and closing sealed cabin includes a lower cabin body opening upward, a first upper cabin body and a second upper cabin body symmetrically arranged and rotatably connected to the inner wall of the lower cabin body, and a connection between the lower cabin body and the first upper cabin body; the present invention has a cleaning function in a closed environment of the loading platform, which does not require shutdown, improves the continuity of work, and effectively avoids the escape of gas during the cleaning process, and maintains the stability of the balanced atmosphere.

Description

Technical Field

[0001] The invention relates to the technical field of kiln application, and in particular to a push-plate type nitrogen atmosphere protection sintering kiln. Background Art

[0002] With the continuous development and application of electronic products, the quality requirements for electronic powders used as basic raw materials for making electronic products are getting higher and higher, and to ensure the quality requirements of electronic powders, the production process must be continuously improved. As known in the industry, there are many types of electronic powders as basic raw materials for electronic products, not limited to the following: color fluorescent powder, lamp powder, barium ferrite, strontium carbonate, calcium titanate, titanium dioxide, aluminum dioxide, aluminum oxide, bismuth oxide, lead aluminum titanate, ferrite and lithium iron phosphate, etc. The firing of these electronic powders is completed in a firing furnace and under the protection of gas such as nitrogen.

[0003] It is well known in the industry that as a firing furnace, it has a feed port and a discharge port without exception. The electronic powder is placed on the stacking plate and pushed into the furnace of the firing furnace by the pushing device located at the feed port. After the firing is completed, it will be discharged from the furnace through the discharge port. During the firing process, the protective gas in the furnace should be in a balanced state, otherwise it will affect the firing quality of the electronic powder, and in serious cases, it will cause it to be scrapped. However, during the feeding and discharging process, every time the furnace door of the feeding and discharging port is opened, the protective gas in the furnace will inevitably escape, which will not only make the atmosphere of the protective gas in the furnace lose balance and affect the firing effect, but also the gas in the furnace will escape to the outside and affect the environment.

[0004] The utility model patent with patent application number CN201320716267.1 in the prior art discloses a push-plate type nitrogen atmosphere protection sintering kiln for all magnetic materials, vanadium nitrogen alloys, battery materials, etc., including a kiln cavity, an outlet transverse delivery chamber connected to the tail of the kiln cavity, and an isolation door that can be closed or opened in the connection section to isolate or connect the kiln cavity and the outlet transverse delivery chamber is provided in the connection section. The utility model is a push-plate type nitrogen atmosphere protection sintering kiln. When the outlet transverse delivery chamber fails and needs to be opened for maintenance, the isolation door can be manually closed to ensure that the atmosphere in the kiln remains stable during the maintenance process, so that the product is not oxidized, but there are still defects. The electronic product sintering furnace in the existing technology including the patent solution is inevitably faulty during actual use, and most of the faults occur in the discharge transition box. For example, if the debris is not cleaned up in time, it may affect the stability of use. If the cover of the discharge transition box is opened for obstacle removal, the protective gas will seriously escape, causing the previous balanced atmosphere to be unbalanced. The current disposal method is to wait until the kiln stops working and then clear the obstacle, which affects the continuous production of the kiln and wastes energy. Summary of the invention

[0005] The purpose of the present invention is to solve the problems in the prior art that gas escape during obstacle clearing causes imbalance of the balanced atmosphere, and obstacle clearing after the kiln is shut down affects the continuous production of the kiln, and a push-plate type nitrogen atmosphere protection sintering kiln is proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A push plate type nitrogen atmosphere protection sintering kiln, comprising a frame, an electric control box installed on the frame, a kiln box installed on the top of the frame and a discharge transition box connected to the tail of the kiln box, and also comprising:

[0008] The push plate isolation mechanism is set at the junction of the cellar box and the discharge transition box;

[0009] The conveying track is installed on the inner wall of the bottom of the discharging transition box and extends into the cellar box;

[0010] The mobile loading part is slidably mounted on the conveying track;

[0011] An opening and closing sealed cabin mechanism is installed in the discharge transition box, the opening and closing sealed cabin comprises a lower cabin body opening upward, a first upper cabin body and a second upper cabin body symmetrically arranged and rotatably connected to the inner wall of the lower cabin body, a limit gear extending outward through the lower cabin body and connected to the intersection of the lower cabin body and the first upper cabin body and the second upper cabin body, and a transmission assembly matched with the limit gear, the top of the lower cabin body is also fixedly connected to an L-shaped sealing portion disposed between the first upper cabin body and the second upper cabin body, and the outer side wall of the lower cabin body is also installed with a nitrogen supplement tank connected to the cavity;

[0012] The cleaning mechanism is installed on the inner walls of the first upper cabin body and the second upper cabin body.

[0013] Preferably, the push plate isolation mechanism includes an isolation door installed between the cellar box and the discharge transition box and a first hydraulic telescopic unit installed on the outer wall of the cellar box, and the telescopic end of the first hydraulic telescopic unit is fixedly connected to the isolation door, and the isolation door avoids the conveying track.

[0014] Preferably, the movable loading part includes a loading platform slidably connected to the conveying track and a second hydraulic telescopic unit installed on the outer wall of the discharge transition box, the telescopic end of the second hydraulic telescopic unit extends toward the inner cavity of the discharge transition box, and the extended end passes through the L-shaped sealing part and is fixedly connected to the loading platform.

[0015] Preferably, the conveying track includes a first conveying section installed on the top of the lower cabin body, a second conveying section extending to the inner cavity of the cellar box, and a tiltable third conveying section connected between the first conveying section and the second conveying section, the first conveying section is movably connected to the third conveying section, the second conveying section and the third conveying section are clearance-matched, and an inclination adjustment component for adjusting the inclination angle of the third conveying section is provided at the junction of the first conveying section and the third conveying section.

[0016] Preferably, the tilt adjustment assembly includes a positioning gear fixedly mounted on one end of the third conveying section close to the first conveying section, a positioning tooth plate mounted under the loading platform and meshing with the positioning gear, and a groove for avoiding the positioning tooth plate is provided on one side of the first conveying section and the third conveying section close to the positioning tooth plate.

[0017] Preferably, when the second hydraulic telescopic unit pulls the loading platform completely into the inner cavity surrounded by the lower cabin body and the first upper cabin body and the second upper cabin body, the third conveying section is in a vertical state and abuts against the L-shaped sealing part, the first upper cabin body and the second upper cabin body, and a sealing strip is provided on the outer wall of the third conveying section.

[0018] Preferably, the transmission assembly includes a first electric telescopic rod installed on the outer side wall of the lower cabin body and a lifting gear plate installed on the telescopic end of the first electric telescopic rod, the lifting gear plate is meshed with the limit gear, and when the first electric telescopic rod is in a retracted state, the first upper cabin body and the second upper cabin body are both in contact with the L-shaped sealing portion, and when the first electric telescopic rod is extended, the first upper cabin body and the second upper cabin body are received into the inner cavity of the lower cabin body, and a gap is provided between the first upper cabin body and the inner side wall of the lower cabin body.

[0019] Preferably, the inner wall of the lower cabin body is also provided with a second electric telescopic rod and a push plate installed at the telescopic end of the second electric telescopic rod, and the push plate is intermittently matched with the inner wall of the bottom of the lower cabin body, and the bottom of the lower cabin body is also provided with an openable cabin door that cooperates with the push plate.

[0020] Preferably, the cleaning mechanism comprises a limit tooth plate installed between the inner side walls of the first upper cabin body, a driving screw and a limit slide rod, an assembly seat threadedly matched with the driving screw and slidingly matched with the limit slide rod, a reverse operation switch installed on the inner side wall of the first upper cabin body and matched with the assembly seat, a driven gear installed at the bottom of the assembly seat and meshed with the limit tooth plate, a telescopic connecting rod portion installed on a side of the driven gear away from the assembly seat, and a cleaning brush installed on a side of the telescopic connecting rod portion away from the driven gear;

[0021] The telescopic connecting rod portion includes a first connecting rod installed on the side of the driven gear away from the assembly seat, a second connecting rod installed on the side of the cleaning brush close to the driven gear, an electromagnetic adsorption plate installed on the opposite end of the first connecting rod and the second connecting rod, a limiting telescopic rod and a compression spring connected between the electromagnetic adsorption plates, and the compression spring is sleeved on the outer wall of the limiting telescopic rod.

[0022] A method for using a push plate type nitrogen atmosphere protection sintering kiln comprises the following steps:

[0023] S1: First, the powder to be fired is placed on the loading platform, and the second hydraulic telescopic unit on the mobile loading part is opened and extended to drive the loading platform into the kiln box for firing. The first hydraulic telescopic unit is extended to drive the isolation door to block the connection between the discharge transition box and the kiln box, so as to ensure the stability of the nitrogen atmosphere in the kiln box for firing;

[0024] S2: After the firing is completed, the isolation door is opened, and the second hydraulic telescopic unit is retracted to drive the loading platform to move along the second conveying section and the third conveying section of the conveying track to the inner cavity of the discharge transition box;

[0025] S3: As the second hydraulic telescopic unit further contracts, the loading platform slides along the first conveying section to above the lower cabin body, and as the positioning gear plate moves with the loading platform, it meshes with the positioning gear, driving the third conveying section to tilt until it abuts against the L-shaped sealing portion. At this time, the second hydraulic telescopic unit no longer telescopes;

[0026] S4: Then, the first electric telescopic rod on the transmission assembly is turned on to drive the lifting gear plate to move downward, drive the limit gear to rotate, and move the first upper cabin body and the second upper cabin body accommodated in the lower cabin body out until they abut against the L-shaped sealing part, thereby realizing the sealing function when cleaning the loading platform;

[0027] S5: At this time, the cleaning mechanism moves to the top of the loading platform following the first upper cabin body and the second upper cabin body. At this time, the electromagnetic adsorption plate is in a powered-on state, and the adjacent electromagnetic adsorption plates attract each other, the limit telescopic rod shrinks, and the compression spring is tightened. When the loading platform needs to be cleaned, the electromagnetic adsorption plate is powered off. At this time, the compression spring between the adjacent electromagnetic adsorption plates rebounds, driving the limit telescopic rod to extend, and driving the cleaning brush to abut against the loading platform surface;

[0028] S6: Then, the driving screw is turned on to drive the assembly seat to move along the driving screw and the limit slide rod. When the assembly seat contacts the reverse operation switch, the rotation direction of the driving screw is adjusted to realize the reciprocating motion of the assembly seat. As the assembly seat moves, the driven gear is driven to rotate along the limit tooth plate, thereby driving the cleaning brush connected to the telescopic connecting rod to clean the loading platform surface. After cleaning, the electromagnetic adsorption plate is energized;

[0029] S7: After cleaning, the first electric telescopic rod is retracted to drive the lifting gear plate to rise, drive the limit gear to rotate, and then accommodate the first upper cabin body and the second upper cabin body into the lower cabin body, and then open the cabin door, and at the same time open the second electric telescopic rod to drive the push plate to clean the waste accumulated in the inner cavity of the lower cabin body and discharge it through the cabin door.

[0030] Compared with the prior art, the present invention provides a push plate type nitrogen atmosphere protection sintering kiln, which has the following beneficial effects:

[0031] 1. The push-plate type nitrogen atmosphere protection sintering kiln realizes the sealing performance when the loading platform is cleaned and repaired by setting an opening and closing sealing cabin mechanism, effectively reduces the gas escape amount in the discharge transition box, and solves the problem in the prior art that when the cover of the discharge transition box is opened for obstacle removal, the protective gas will seriously escape, causing the previous balanced atmosphere to be unbalanced.

[0032] 2. The push-plate type nitrogen atmosphere protection sintering kiln realizes the nitrogen replenishment function in the inner cavity of the opening and closing sealed cabin mechanism by setting up a nitrogen replenishing tank, which is beneficial to maintaining the stability of the nitrogen atmosphere in the discharge transition box.

[0033] 3. The push-plate type nitrogen atmosphere protection sintering kiln realizes the centralized cleaning function of waste by setting the second electric telescopic rod and the push plate, avoiding the waste from clogging the conveying track and improving the stability of the device.

[0034] 4. The push-plate type nitrogen atmosphere protection sintering kiln further improves the sealing performance of the lower cabin body and the upper cabin body by setting a tiltable third conveying section that is sealed with the opening and closing sealed cabin mechanism, and solves the problem in the prior art that when the cover of the discharge transition box is opened for obstacle clearance, the protective gas will seriously escape, causing the previous balanced atmosphere to be unbalanced.

[0035] 5. The push-plate type nitrogen atmosphere protection sintering kiln realizes the cleaning function of the loading platform in the working state through the telescopic cleaning mechanism, and has good storage performance in the non-working state. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is one of the structural schematic diagrams of the present invention.

[0037] Figure 2 This is the second structural schematic diagram of the present invention.

[0038] Figure 3 It is a schematic diagram of the main structure of the present invention.

[0039] Figure 4 It is a schematic diagram of the structure inside the discharge transition box of the present invention.

[0040] Figure 5 It is a schematic diagram of the explosion structure of the opening and closing sealed cabin mechanism of the present invention.

[0041] Figure 6 This is one of the internal structure schematic diagrams of the openable and closed sealed cabin mechanism of the present invention.

[0042] Figure 7This is the second schematic diagram of the internal structure of the opening and closing sealed cabin mechanism of the present invention.

[0043] Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure of part A.

[0044] Fig. 9 It is a schematic structural diagram of the transmission assembly of the present invention.

[0045] Fig.10 It is a structural schematic diagram of the cleaning mechanism of the present invention.

[0046] Fig.11 It is a structural schematic diagram of the cleaning mechanism of the present invention.

[0047] In the figure: 10, frame; 110, electric control box; 120, cellar box; 130, discharging transition box; 20, push plate isolation mechanism; 210, isolation door; 220, first hydraulic telescopic unit; 30, conveying track; 310, first conveying section; 320, second conveying section; 330, third conveying section; 340, tilt adjustment assembly; 341, positioning gear; 342, positioning gear plate; 40, mobile loading part; 410, loading platform; 420, second hydraulic telescopic unit; 50, opening and closing sealed cabin mechanism; 510, lower cabin; 520, first upper cabin; 530, second upper cabin; 540, limit gear; 550, transmission assembly; 551, first electric telescopic rod; 552, lifting gear plate; 560, L-shaped sealing part; 570, nitrogen replenishing tank; 60, cleaning mechanism; 610, limit gear plate; 620, driving screw rod; 630, limit slide rod; 640, assembly seat; 650, reverse operation switch; 660, driven gear; 670, telescopic connecting rod part; 671, first connecting rod; 672, second connecting rod; 673, electromagnetic adsorption plate; 674, limit telescopic rod; 675, compression spring; 680, cleaning brush; 70, second electric telescopic rod; 80, push plate. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0049] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.

[0050] Embodiment 1:

[0051] Reference Figure 1-11 A push plate type nitrogen atmosphere protection sintering kiln includes a frame 10, an electric control box 110 installed on the frame 10, a kiln box 120 installed on the top of the frame 10, and a discharge transition box 130 connected to the tail of the kiln box 120, and also includes,

[0052] The push plate isolation mechanism 20 is arranged at the junction of the cellar box 120 and the discharge transition box 130;

[0053] The conveying track 30 is installed on the bottom inner wall of the discharge transition box 130 and extends into the cellar box 120;

[0054] The movable loading part 40 is slidably mounted on the conveying track 30;

[0055] The opening and closing sealed cabin mechanism 50 is installed in the discharge transition box 130, and the opening and closing sealed cabin mechanism 50 includes a lower cabin body 510 opened upward, a first upper cabin body 520 and a second upper cabin body 530 symmetrically arranged and rotatably connected to the inner wall of the lower cabin body 510, a limit gear 540 extending outward through the lower cabin body 510 and connected to the intersection of the lower cabin body 510 and the first upper cabin body 520 and the second upper cabin body 530, and a transmission assembly 550 matched with the limit gear 540, and the top of the lower cabin body 510 is also fixedly connected to an L-shaped sealing portion 560 disposed between the first upper cabin body 520 and the second upper cabin body 530, and the outer side wall of the lower cabin body 510 is also installed with a nitrogen supplement tank 570 connected to the cavity;

[0056] The cleaning mechanism 60 is installed on the inner walls of the first upper chamber 520 and the second upper chamber 530 .

[0057] Reference Figure 1 , Figure 2 and Figure 3 The push plate isolation mechanism 20 includes an isolation door 210 installed between the cellar box 120 and the discharge transition box 130 and a first hydraulic telescopic unit 220 installed on the outer wall of the cellar box 120, and the telescopic end of the first hydraulic telescopic unit 220 is fixedly connected to the isolation door 210, and the isolation door 210 avoids the conveying track 30.

[0058] Reference Figure 4-7The movable loading part 40 includes a loading platform 410 slidably connected to the conveying track 30 and a second hydraulic telescopic unit 420 installed on the outer wall of the discharge transition box 130. The telescopic end of the second hydraulic telescopic unit 420 extends toward the inner cavity of the discharge transition box 130, and the extended end passes through the L-shaped sealing part 560 and is fixedly connected to the loading platform 410.

[0059] Reference Fig. 9 The transmission assembly 550 includes a first electric telescopic rod 551 installed on the outer wall of the lower cabin 510 and a lifting gear plate 552 installed on the telescopic end of the first electric telescopic rod 551. The lifting gear plate 552 is engaged with the limit gear 540. When the first electric telescopic rod 551 is in the retracted state, the first upper cabin 520 and the second upper cabin 530 are both in contact with the L-shaped sealing portion 560. When the first electric telescopic rod 551 is extended, the first upper cabin 520 and the second upper cabin 530 are received in the inner cavity of the lower cabin 510, and a gap is provided between the first upper cabin 520 and the inner wall of the lower cabin 510.

[0060] Reference Figure 6 and Figure 7 The inner wall of the lower cabin body 510 is also provided with a second electric telescopic rod 70 and a push plate 80 installed at the telescopic end of the second electric telescopic rod 70, and the push plate 80 is intermittently matched with the inner wall of the bottom of the lower cabin body 510, and the bottom of the lower cabin body 510 is also provided with an openable cabin door that cooperates with the push plate 80.

[0061] The cleaning mechanism 60 includes a limit tooth plate 610 installed between the inner side walls of the first upper cabin body 520, a driving screw rod 620 and a limit slide rod 630, an assembly seat 640 threadedly matched with the driving screw rod 620 and slidingly matched with the limit slide rod 630, a reverse operation switch 650 installed on the inner side wall of the first upper cabin body 520 and matched with the assembly seat 640, a driven gear 660 installed at the bottom of the assembly seat 640 and meshed with the limit tooth plate 610, a telescopic connecting rod portion 670 installed on the side of the driven gear 660 away from the assembly seat 640, and a cleaning brush 680 installed on the side of the telescopic connecting rod portion 670 away from the driven gear 660;

[0062] Reference Fig.10 and Fig.11 The telescopic link part 670 includes a first link 671 installed on the side of the driven gear 660 away from the assembly seat 640, a second link 672 installed on the side of the cleaning brush 680 close to the driven gear 660, an electromagnetic adsorption plate 673 installed on the opposite ends of the first link 671 and the second link 672, a limiting telescopic rod 674 and a compression spring 675 connected between the electromagnetic adsorption plates 673, and the compression spring 675 is sleeved on the outer wall of the limiting telescopic rod 674. The telescopic cleaning mechanism 60 realizes the cleaning function of the loading platform 410 in the working state and has good storage performance in the non-working state.

[0063] First, the powder to be fired is placed on the loading platform 410, and the second hydraulic expansion unit 420 on the movable loading part 40 is opened and extended, driving the loading platform 410 to enter the cellar box 120 for firing. The first hydraulic expansion unit 220 is extended to drive the isolation door 210 to block the connection between the discharge transition box 130 and the cellar box 120, ensuring the stability of the nitrogen atmosphere in the cellar box 120 for firing;

[0064] After the firing is completed, the isolation door 210 is opened, and the second hydraulic telescopic unit 420 is retracted to drive the loading platform 410 to move along the second conveying section 320 and the third conveying section 330 of the conveying track 30 to the inner cavity of the discharge transition box 130;

[0065] Then, the first electric telescopic rod 551 on the transmission assembly 550 is turned on, driving the lifting gear plate 552 to move downward, driving the limiting gear 540 to rotate, and moving the first upper cabin 520 and the second upper cabin 530 accommodated in the lower cabin 510 out until they abut against the L-shaped sealing portion 560, thereby realizing the sealing function when cleaning the loading platform 410; at this time, the cleaning mechanism 60 follows the first upper cabin 520 and the second upper cabin 530 to move above the loading platform 410, at this time, the electromagnetic adsorption plate 673 is in a powered-on state, the adjacent electromagnetic adsorption plates 673 attract each other, the limiting telescopic rod 674 contracts, and the compression spring 675 is tightened, and when it is necessary to clean the loading platform 410, the electromagnetic adsorption plate 673 is powered off, and the compression spring 675 between the adjacent electromagnetic adsorption plates 673 rebounds, driving the limiting telescopic rod 674 to extend, and driving the cleaning brush 680 to abut against the surface of the loading platform 410; then the drive is turned on. The screw rod 620 drives the assembly seat 640 to move along the driving screw rod 620 and the limiting slide bar 630. When the assembly seat 640 conflicts with the reverse operation switch 650, the rotation direction of the driving screw rod 620 is adjusted to realize the reciprocating motion of the assembly seat 640. As the assembly seat 640 moves, the driven gear 660 is driven to rotate along the limiting tooth plate 610, thereby driving the cleaning brush 680 connected through the telescopic connecting rod part 670 to clean the surface of the loading platform 410. After cleaning, the electromagnetic adsorption plate 673 is energized; after cleaning, the first electric telescopic rod 551 is retracted to drive the lifting tooth plate 552 to rise, drive the limiting gear 540 to rotate, and then accommodate the first upper cabin 520 and the second upper cabin 530 into the lower cabin 510, and then open the cabin door, and at the same time open the second electric telescopic rod 70 to drive the push plate 80 to clean the waste accumulated in the inner cavity of the lower cabin 510 and discharge it through the cabin door.

[0066] Embodiment 2:

[0067] Reference Figure 5 , Figure 7 and Figure 8, a push-plate type nitrogen atmosphere protected sintering kiln, which is basically the same as Example 1, and further, the conveying track 30 includes a first conveying section 310 installed on the top of the lower cabin 510, a second conveying section 320 extending to the inner cavity of the kiln box 120, and a tiltable third conveying section 330 connected between the first conveying section 310 and the second conveying section 320, the first conveying section 310 and the third conveying section 330 are movably connected, the second conveying section 320 and the third conveying section 330 are clearance-matched, and an inclination adjustment component 340 for adjusting the inclination angle of the third conveying section 330 is provided at the junction of the first conveying section 310 and the third conveying section 330.

[0068] The tilt adjustment assembly 340 includes a positioning gear 341 fixedly mounted on one end of the third conveying section 330 close to the first conveying section 310, and a positioning tooth plate 342 mounted under the loading platform 410 and meshing with the positioning gear 341. A groove for avoiding the positioning tooth plate 342 is provided on one side of the first conveying section 310 and the third conveying section 330 close to the positioning tooth plate 342.

[0069] When the second hydraulic telescopic unit 420 pulls the loading platform 410 to completely enter the inner cavity surrounded by the lower cabin 510, the first upper cabin 520, and the second upper cabin 530, the third conveying section 330 is in a vertical state and abuts against the L-shaped sealing portion 560, the first upper cabin 520, and the second upper cabin 530, and a sealing strip is provided on the outer side wall of the third conveying section 330;

[0070] As the second hydraulic telescopic unit 420 further contracts, the loading platform 410 slides along the first conveying section 310 to above the lower cabin body 510. As the positioning tooth plate 342 moves with the loading platform 410, it engages with the positioning gear 341, driving the third conveying section 330 to tilt until it abuts against the L-shaped sealing portion 560. At this time, the second hydraulic telescopic unit 420 no longer retracts and retracts. The tiltable third conveying section 330 that is sealed with the opening and closing sealed cabin mechanism 50 is set, which further improves the sealing performance of the lower cabin body 510 and the first upper cabin body 520 and the second upper cabin body 530, thereby solving the problem in the prior art that when the cover of the discharge transition box 130 is opened for obstacle clearance, the protective gas will seriously escape, causing the previous balanced atmosphere to be unbalanced.

[0071] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A nitrogen atmosphere protected sintering kiln, comprising a frame (10), an electric control box (110) mounted on the frame (10), a kiln box (120) mounted on the top of the frame (10), and a discharge transition box (130) connected to the rear of the kiln box (120), characterized in that: Also includes, The push plate isolation mechanism (20) is arranged at the junction of the cellar box (120) and the discharge transition box (130); A conveying track (30) is installed on the inner wall of the bottom of the discharge transition box (130) and extends into the cellar box (120); A movable loading part (40) is slidably mounted on the conveying track (30); An openable and closed sealed cabin mechanism (50) is installed in a discharge transition box (130), the openable and closed sealed cabin mechanism (50) comprising a lower cabin body (510) opening upward, a first upper cabin body (520) and a second upper cabin body (530) symmetrically arranged and rotatably connected to the inner wall of the lower cabin body (510), a limit gear (540) extending outward through the lower cabin body (510) and connected to the intersection of the lower cabin body (510) and the first upper cabin body (520) and the second upper cabin body (530), and a transmission assembly (550) cooperating with the limit gear (540), the top of the lower cabin body (510) is also fixedly connected to an L-shaped sealing portion (560) disposed between the first upper cabin body (520) and the second upper cabin body (530), and the outer side wall of the lower cabin body (510) is also installed with a nitrogen supplement tank (570) connected to the cavity; A cleaning mechanism (60) is installed on the inner walls of the first upper cabin body (520) and the second upper cabin body (530); The movable loading part (40) comprises a loading platform (410) slidably connected to the conveying track (30) and a second hydraulic telescopic unit (420) installed on the outer wall of the discharge transition box (130), wherein the telescopic end of the second hydraulic telescopic unit (420) extends toward the inner cavity of the discharge transition box (130), and the extended end passes through the L-shaped sealing part (560) and is fixedly connected to the loading platform (410); The transmission assembly (550) comprises a first electric telescopic rod (551) mounted on the outer wall of the lower cabin (510) and a lifting gear plate (552) mounted on the telescopic end of the first electric telescopic rod (551), wherein the lifting gear plate (552) is meshed with the limit gear (540), and when the first electric telescopic rod (551) is in a retracted state, the first upper cabin (520) and the second upper cabin (530) are both in contact with the L-shaped sealing portion (560), and when the first electric telescopic rod (551) is extended, the first upper cabin (520) and the second upper cabin (530) are stored in the inner cavity of the lower cabin (510), and a gap is provided between the first upper cabin (520) and the inner wall of the lower cabin (510); The push plate isolation mechanism (20) comprises an isolation door (210) installed between the cellar box (120) and the discharge transition box (130) and a first hydraulic telescopic unit (220) installed on the outer wall of the cellar box (120), wherein the telescopic end of the first hydraulic telescopic unit (220) is fixedly connected to the isolation door (210), and the isolation door (210) avoids the conveying track (30); The conveying track (30) comprises a first conveying section (310) installed on the top of the lower cabin (510), a second conveying section (320) extending to the inner cavity of the cellar box (120), and a tiltable third conveying section (330) connected between the first conveying section (310) and the second conveying section (320), wherein the first conveying section (310) and the third conveying section (330) are movably connected, the second conveying section (320) and the third conveying section (330) are clearance-matched, and a tilt adjustment component (340) for adjusting the tilt angle of the third conveying section (330) is provided at the intersection of the first conveying section (310) and the third conveying section (330).

2. A nitrogen atmosphere protected sintering kiln according to claim 1, characterized in that: The tilt adjustment assembly (340) comprises a positioning gear (341) fixedly mounted on one end of the third conveying section (330) close to the first conveying section (310), and a positioning tooth plate (342) mounted below the loading platform (410) and meshing with the positioning gear (341); and a slot for avoiding the positioning tooth plate (342) is provided on one side of the first conveying section (310) and the third conveying section (330) close to the positioning tooth plate (342).

3. A nitrogen atmosphere protected sintering kiln according to claim 2, characterized in that: The inner side wall of the lower cabin body (510) is also provided with a second electric telescopic rod (70) and a push plate (80) installed at the telescopic end of the second electric telescopic rod (70), and the push plate (80) is intermittently matched with the inner wall of the bottom of the lower cabin body (510), and the bottom of the lower cabin body (510) is also provided with an openable cabin door that cooperates with the push plate (80).

4. A nitrogen atmosphere protected sintering kiln according to claim 3, characterized in that: The cleaning mechanism (60) comprises a limit tooth plate (610) installed between the inner side walls of the first upper cabin body (520), a driving screw (620) and a limit slide rod (630), an assembly seat (640) threadedly matched with the driving screw (620) and slidably matched with the limit slide rod (630), a reverse operation switch (650) installed on the inner side wall of the first upper cabin body (520) and matched with the assembly seat (640), a driven gear (660) installed at the bottom of the assembly seat (640) and meshed with the limit tooth plate (610), a telescopic connecting rod portion (670) installed on a side of the driven gear (660) away from the assembly seat (640), and a cleaning brush (680) installed on a side of the telescopic connecting rod portion (670) away from the driven gear (660); The telescopic link part (670) comprises a first link (671) installed on the side of the driven gear (660) away from the assembly seat (640), a second link (672) installed on the side of the cleaning brush (680) close to the driven gear (660), an electromagnetic adsorption plate (673) installed on the opposite end of the first link (671) and the second link (672), a limiting telescopic rod (674) and a compression spring (675) connected between the electromagnetic adsorption plates (673), and the compression spring (675) is sleeved on the outer wall of the limiting telescopic rod (674).

5. The method for using a nitrogen atmosphere protected sintering kiln as claimed in claim 4, characterized in that: The following steps are involved: S1: First, the powder to be fired is placed on the loading platform (410), and the second hydraulic expansion unit (420) on the movable loading part (40) is opened and extended, driving the loading platform (410) to enter the kiln box (120) for firing. The first hydraulic expansion unit (220) is extended to drive the isolation door (210) to block the communication port between the discharge transition box (130) and the kiln box (120), thereby ensuring that the nitrogen atmosphere during firing in the kiln box (120) is stable; S2: After the firing is completed, the isolation door (210) is opened, and the second hydraulic telescopic unit (420) is retracted to drive the loading platform (410) to move along the second conveying section (320) and the third conveying section (330) of the conveying track (30) into the inner cavity of the discharge transition box (130); S3: As the second hydraulic telescopic unit (420) further contracts, the loading platform (410) slides along the first conveying section (310) to above the lower cabin (510), and as the positioning gear plate (342) moves with the loading platform (410), it meshes with the positioning gear (341), driving the third conveying section (330) to tilt until it abuts against the L-shaped sealing portion (560), at which time the second hydraulic telescopic unit (420) no longer telescopes; S4: Then, the first electric telescopic rod (551) on the transmission assembly (550) is turned on to drive the lifting gear plate (552) to move downward, drive the limit gear (540) to rotate, and move the first upper cabin (520) and the second upper cabin (530) accommodated in the lower cabin (510) out until they abut against the L-shaped sealing portion (560), thereby realizing a sealing function for cleaning the loading platform (410); S5: At this time, the cleaning mechanism (60) moves to the top of the loading platform (410) following the first upper cabin body (520) and the second upper cabin body (530). At this time, the electromagnetic adsorption plate (673) is in a powered-on state, adjacent electromagnetic adsorption plates (673) attract each other, the limit telescopic rod (674) contracts, and the compression spring (675) is tightened. When the loading platform (410) needs to be cleaned, the electromagnetic adsorption plate (673) is powered off. At this time, the compression spring (675) between the adjacent electromagnetic adsorption plates (673) rebounds, driving the limit telescopic rod (674) to extend, and driving the cleaning brush (680) to abut against the surface of the loading platform (410); S6: Then, the driving screw (620) is turned on to drive the assembly seat (640) to move along the driving screw (620) and the limit slide bar (630). When the assembly seat (640) contacts the reverse operation switch (650), the rotation direction of the driving screw (620) is adjusted to achieve the reciprocating motion of the assembly seat (640). As the assembly seat (640) moves, the driven gear (660) is driven to rotate along the limit tooth plate (610), thereby driving the cleaning brush (680) connected by the telescopic connecting rod (670) to clean the surface of the loading platform (410). After cleaning, the electromagnetic adsorption plate (673) is energized; S7: After cleaning is completed, the first electric telescopic rod (551) is retracted to drive the lifting gear plate (552) to rise, drive the limit gear (540) to rotate, and then accommodate the first upper cabin (520) and the second upper cabin (530) into the lower cabin (510), and then open the cabin door (511). At the same time, the second electric telescopic rod (70) is opened to drive the push plate (80) to clean the waste accumulated in the inner cavity of the lower cabin (510) and discharge it through the cabin door (511).

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