An automatic conveying device for entering and exiting a quenching furnace

Abstract

This invention belongs to the field of metal heat treatment technology, and specifically relates to an automatic conveying device for entering and exiting a quenching furnace. The device includes a furnace body and a sealing door installed at the furnace opening. It also includes: a support unit symmetrically installed inside the furnace body; an upper guide rail unit symmetrically fixed to the furnace opening extension of the furnace body via support legs; a lower guide rail unit symmetrically fixed below the upper guide rail unit via support legs; a feeding rack for carrying and unloading quenched parts; a ground rail laid at the bottom of the furnace body and extending towards the furnace opening; a railcar moving on the ground rail; a feeding mechanism mounted on the railcar for driving the feeding rack to automatically enter and exit the furnace body; and a lifting and docking assembly installed at the furnace opening to connect the support unit and the upper guide rail unit. This invention solves the problems of increased heat loss, decreased furnace temperature stability, and further increased energy consumption caused by long waiting times in the quenching furnace.

Description

Technical Field

[0001] This invention belongs to the field of metal heat treatment technology, and in particular relates to an automatic conveying device for entering and exiting a quenching furnace. Background Technology

[0002] Quenching is a metal heat treatment process in which metal parts are heated to a suitable temperature and held for a period of time, then rapidly immersed in a quenching medium to cool the metal quickly. Commonly used quenching media include brine, water, and mineral oil. Quenching can significantly improve the strength, hardness, wear resistance, fatigue strength, and toughness of metals, thereby meeting the different usage requirements of various mechanical parts and tools.

[0003] The existing conveying and feeding method of quenching furnaces basically adopts the combination of ground rails and railcars. The parts to be quenched are stacked on the pallet of the railcar, and then the pallet is moved into the furnace body of the quenching furnace by the railcar for quenching treatment. The existing material conveying devices basically integrate the pallet and the railcar. Therefore, when the parts to be quenched are sent into the furnace for quenching, the railcar will also be placed in place at the same time. When the quenched parts are taken out of the quenching furnace, the open bottom of the furnace not only wastes heat, but also requires the parts to cool down before they can be taken out of the pallet before the next batch of parts to be quenched can be stacked and conveyed for quenching. Obviously, this method not only requires a long waiting time, which affects the efficiency of the quenching furnace, but also increases heat loss, reduces furnace temperature stability, and further increases energy consumption. Although some methods involve directly feeding the pallets into the furnace and then moving the feeding trolley to the outside of the quenching furnace, this conveying device can only feed and retrieve materials from one set of pallets at a time. After the quenched parts are removed, it is necessary to wait for them to be taken off the pallets before the next batch of parts to be quenched can be placed on the pallets for quenching. Obviously, this method also consumes a lot of time for retrieving and placing materials from the same pallet, which inevitably leads to a significant reduction in the efficiency of the quenching furnace. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to an automatic conveying device for entering and exiting a quenching furnace, comprising a furnace body and a sealing door installed at the furnace opening of the furnace body; further comprising: a support unit symmetrically installed inside the furnace body; an upper guide rail unit symmetrically fixed to the furnace opening extension of the furnace body via support legs; a lower guide rail unit symmetrically fixed below the upper guide rail unit via support legs; a feeding rack that moves on the support unit, upper guide rail unit, and lower guide rail unit for carrying and unloading quenched parts; a ground rail laid on the ground at the bottom of the furnace body and extending away from the furnace opening; a railcar mounted on the ground rail for movement; a feeding mechanism mounted on the railcar for driving the feeding rack to automatically enter and exit the furnace body; and a lifting and docking assembly installed at the furnace opening of the furnace body to dock the support unit and the upper guide rail unit.

[0005] Preferably, the side walls of the support section, the upper guide rail section, and the lower guide rail section are all provided with U-shaped track grooves with open ends; the feeding frame is equipped with multiple sets of shafts, and each set of shafts is equipped with a wheel via bearings, and the wheel slides in the U-shaped track groove; the bottom of the U-shaped track groove of the upper guide rail section is provided with a through cavity, and a support plate is movably installed in the through cavity via a support; when the feeding frame moves to the position of the support plate, the feeding mechanism is used to move the quenched feeding frame down to the lower guide rail section.

[0006] Preferably, the end of the lower guide rail is flush with the cavity opening in the direction away from the furnace opening, and the lower guide rail extends in the direction away from the furnace opening, and the length of the ground rail extending in the direction away from the furnace opening is greater than the length of the lower guide rail extending in the direction away from the furnace opening.

[0007] Preferably, the feeding mechanism includes two sets of power sources mounted on the railcar, a first crossbar mounted on the output end of one of the power sources, a second crossbar connected by a connecting rod, and at least two sets of docking blocks mounted on the bottom of the feeding frame; the second crossbar is aligned with another power source, and the at least two sets of docking blocks are detachably connected to the first crossbar and the second crossbar respectively, so that the power source drives the feeding frame to move between the support section, the upper guide rail section and the lower guide rail section.

[0008] Preferably, the support includes a first support rod fixedly mounted on the bottom of the support plate, a first support block fixed on the inner side of the support leg, and an elastic member sleeved on the first support rod and connected at both ends to the first support block and the support plate; and the first support rod is movably passed through the first support block and connected to a nut.

[0009] Preferably, the support part further includes a U-shaped bracket installed at the end of the lower guide rail part for limiting the downward support plate; the support part further includes a limiting block hinged to the through cavity side wall by a hinge column, and a torsion spring is installed between the hinge column and the limiting block, and the support plate part is provided with a notch groove that cooperates with the limiting block.

[0010] Preferably, the lifting docking assembly includes a frame fixed to the ground, a second support rod mounted on the frame, a U-shaped docking frame mounted at the furnace opening and docking with the upper guide rail and support, a second support block mounted outside the U-shaped docking frame, and an elastic element connected to the second support block and the frame; the top end of the second support rod moves through the second support block, the U-shaped docking frame is located below the sealing door, and the sealing door has a guide hole that cooperates with the second support rod.

[0011] Preferably, each set of the docking blocks has at least 3 blocks, and the docking blocks are made of metal; at least 3 docking slots are provided on both the first and second crossbars, and electromagnetic suction blocks are installed inside the docking slots; electromagnetic suction blocks are also installed on the output end of the power source that is not connected to the second crossbar.

[0012] The present invention has the following beneficial effects: This invention utilizes the coordinated operation of the upper guide rail section, lower guide rail section, railcar, and feeding mechanism to quickly and safely transfer the quenching feeder inside the furnace from the upper guide rail section to the lower guide rail section. Meanwhile, the feeder to be quenched is directly transported into the furnace through the upper guide rail section. This allows the two sets of feeders to operate on the support section, upper guide rail section, and lower guide rail section without interference. Consequently, the quenching furnace no longer needs to wait for all quenched parts to be removed from the feeder before placing the parts to be quenched onto the feeder before quenching can begin. This not only improves the efficiency of continuous quenching in the quenching furnace but also effectively solves the problems of increased heat loss, decreased furnace temperature stability, and further increased energy consumption caused by long waiting times.

[0013] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a first-view view of the conveying device according to an embodiment of the present invention; Figure 2 This is a second perspective view of the conveying device according to an embodiment of the present invention; Figure 3 This is a diagram showing the coordinated state of two sets of feeding racks according to an embodiment of the present invention. Figure 4 This is a schematic diagram of the feeding mechanism according to an embodiment of the present invention; Figure 5 This is a diagram showing the engagement state of a single set of upper and lower guide rail sections according to an embodiment of the present invention. Figure 6 The present invention discloses an embodiment of the invention. Figure 5 Enlarged view of a portion of point A in the middle; Figure 7 This is a diagram showing the cooperation state of the feeding mechanism and the feeding rack according to an embodiment of the present invention.

[0016] In the diagram: 1. Furnace body; 2. Seal the door; 3. Support section; 4. Upper guide rail section; 41. Support plate; 42. Notch / groove; 5. Lower guide rail section; 6. Ground track; 61. Railcar; 7. Feeding rack; 71. Shaft; 72. Wheel; 8. Feeding mechanism; 81. Power source; 82. First crossbar; 83. Connecting rod; 84. Second crossbar; 85. Connecting block; 86. Connecting slot; 9. Lifting and docking assembly; 91. Frame; 92. Second support rod; 93. U-shaped docking frame; 94. Second support block; 10. Support part; 101. First support rod; 102. First support block; 103. Elastic element; 104. U-shaped bracket; 105. Limiting block. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0019] Please see Figures 1-7 As shown, the present invention is an automatic conveying device for entering and exiting a quenching furnace, comprising a furnace body 1 and a sealing door 2 installed at the furnace opening of the furnace body 1; further comprising: a support section 3, symmetrically installed inside the furnace body 1; an upper guide rail section 4, symmetrically fixed to the furnace opening extension of the furnace body 1 by support legs; a lower guide rail section 5, symmetrically fixed below the upper guide rail section 4 by support legs; a feeding rack 7, movable on the support section 3, the upper guide rail section 4, and the lower guide rail section 5, used for carrying and unloading quenched parts; a ground rail 6, laid on the ground at the bottom of the furnace body 1 and extending away from the furnace opening of the furnace body 1; a railcar 61, installed on the ground rail 6, allowing it to move on the ground rail 6; a feeding mechanism 8, installed on the railcar 61, used to drive the feeding rack 7 to automatically enter and exit the furnace body 1; and a lifting and docking assembly 9, which is installed at the furnace opening of the furnace body 1 to dock the support section 3 and the upper guide rail section 4; Furthermore, the end of the lower guide rail 5 is flush with the cavity opening in the direction away from the furnace opening, and the lower guide rail 5 extends in the direction away from the furnace opening, while the length of the ground rail 6 extending in the direction away from the furnace opening is greater than the length of the lower guide rail 5 extending in the direction away from the furnace opening. Specifically, the U-shaped support section 3 is symmetrically fixed on the front and rear inner walls of the furnace body 1, the upper guide rail section 4 extends to the right at the furnace opening, and the ground rail 6 extends to the bottom of the furnace body 1. The sealing door 2 can move up and down at the furnace opening of the furnace body 1 through the elevator installed on the top of the furnace body 1 to seal the furnace opening. The conveying device of the quenching furnace in this application is used as follows: First, when quenching parts is required, the feeding rack 7 is placed on the upper guide rail 4 (as marker point 1). Then, the parts to be quenched are stacked on the feeding rack 7 in sequence. It should be noted that the height of the stacked parts should be less than the distance between the upper guide rail 4 and the lower guide rail 5. Then, the drive car 61 is moved on the ground rail 6, which moves the feeding mechanism 8 to below the feeding rack 7. The feeding mechanism 8 is then fixedly connected to the feeding rack 7. The drive car 61 then moves on the ground rail 6 towards the furnace body 1 (to the left), so that the feeding rack 7 is moved along the upper guide rail 4 and the lifting docking assembly. Part 9 moves to the support part 3, so that the support part 3 can support the feeding rack 7. Then the feeding mechanism 8 disengages from the feeding rack 7. At this time, the railcar 61 moves away from the furnace opening (to the right) so that the feeding mechanism 8 disengages from the furnace body 1. Then the elevator is controlled to block the sealing door 2 at the furnace opening of the furnace body 1. At this time, the lifting docking assembly 9 will descend and disengage from the support part 3 and the upper guide rail part 4. The parts on the feeding rack 7 are heated to the quenching temperature (750℃~950℃) in the furnace chamber of the furnace body 1 and held for a certain time to make the workpiece temperature uniform and the structure completely austenitized. The second step involves the quenching furnace heating the parts laid on the feeding rack 7 during normal operation. At this time, the operator can place another set of feeding racks 7 back into the marked point 1 of the upper guide rail section 4. Then, the parts to be quenched are sequentially stacked onto the feeding racks 7. Once the parts being heated inside the furnace 1 have completed quenching, the sealing door 2 is opened via the elevator. At this time, the lifting docking assembly 9 automatically rises, docking the support section 3 with the upper guide rail section 4. Then, the railcar 61 drives the feeding mechanism 8 into the furnace 1, connecting the feeding mechanism 8 with the feeding rack 7 inside the furnace 1. Finally, the railcar 61 moves to the right on the ground rail 6, driving... The feeding rack 7 inside the furnace body 1 moves to the support plate 41 on the upper guide rail 4 (as mark point 2), and the mark point 2 is located to the left of mark point 1. Then the feeding mechanism 8 drives the quenched feeding rack 7 and the part to descend vertically. At this time, the support plate 41 will descend to align with the bottom surface of the lower guide rail 5. Then the railcar 61 moves to the right along the ground rail 6 again, so that the quenched feeding rack 7 moves to the right on the lower guide rail 5. The point of movement is mark point 3, and mark point 3 is located to the right of mark point 1. Then the feeding mechanism 8 disengages from the feeding rack 7, so that the quenched feeding rack 7 and the part are located on the lower guide rail 5. Third step, after the feeding mechanism 8 is disconnected from the quenched feeding rack 7, the railcar 61 moves to the left to the mark point 1. The rising of the feeding mechanism 8 will connect with the feeding rack 7 at the mark point 1 where the parts are stacked. Then the railcar 61 continues to move to the left, so that it can send the parts to be quenched into the furnace body 1 through the feeding rack 7. Then the elevator closes the sealing door 2, so that the furnace body 1 can work normally to heat and quench the parts stacked on the feeding rack 7. Fourthly, the operator can use a robotic arm or other clamping tools to pick up the quenched parts from the feeding rack 7 at mark 3 and send them to the cooling pool. Meanwhile, the parts on another set of feeding racks 7 inside the furnace body 1 continue to be quenched and heated to prevent them from interfering with each other. After all the quenched parts have been removed from the feeding racks 7, the railcar 61 moves the feeding mechanism 8 to the position of mark 3, connecting the feeding mechanism 8 with the feeding rack 7 at that location. Since the right ends of the upper guide rail section 4 and the lower guide rail section 5 are both open, Since the length of the ground rail 6 is greater than the length of the lower guide rail 5, the railcar 61 will continue to move to the right and detach the feeding rack 7 from the lower guide rail 5. Then the feeding mechanism 8 will lift the feeding rack 7 up so that the feeding rack 7 is flush with the upper guide rail 4. Then the railcar 61 will move to the left on the ground rail 6 and lift the feeding rack 7 to the mark point 1 on the upper guide rail 4. At this time, the operator will continue to place the parts to be quenched on the feeding rack 7, so that the next batch of parts to be quenched can be placed first and wait for quenching treatment.

[0020] In a preferred embodiment, the side walls of the support section 3, the upper guide rail section 4, and the lower guide rail section 5 are all provided with U-shaped track grooves with open ends; the feeding rack 7 is equipped with multiple sets of shafts 71, and each set of shafts 71 is equipped with a wheel 72 via bearings, and the wheel 72 slides in the U-shaped track groove; the bottom of the U-shaped track groove of the upper guide rail section 4 is provided with a through cavity, and a support plate 41 is movably installed in the through cavity via a support section 10; when the feeding rack 7 moves to the position of the support plate 41, the feeding mechanism 8 is used to move the quenched feeding rack 7 down to the lower guide rail section 5; Specifically, the wheel 72 is made of high-temperature resistant caster or other wheel 72, and at least three sets of wheel 72 are installed on the front and rear sides of the feeding frame 7. Therefore, when the feeding mechanism 8 moves left and right under the drive of the railcar 61, the feeding frame 7 can be stably supported and accurately moved in the U-shaped track groove through the cooperation of multiple sets of wheel 72 and shaft 71, which makes it easy to stably feed the feeding frame 7 into the furnace body 1, or take it out from the furnace body 1, and then transfer it from the upper guide rail 4 to the lower guide rail 5. When the quenched part moves to the mark point 2 (the through cavity corresponding to the support plate 41) along with the feeding frame 7, the feeding mechanism 8 will drive the feeding frame 7 to descend vertically. At this time, the support plate 41 will also descend vertically under the elastic support of the support part 10, so that the surface of the support plate 41 is flush with the bottom of the U-shaped track groove of the lower guide rail part 5. Then, when the railcar 61 moves to the right again, the feeding mechanism 8 will drive the feeding frame 7 to move to the lower guide rail part 5 (mark point 3). At this time, the feeding frame 7 will detach from the support plate 41, and the support plate 41 will rise to the through cavity under the pushing force of the support part 10 to seal the through cavity. When the feeding rack 7 moves from right to left into the furnace body 1 at the upper guide rail section 4 (moving from the mark point 1 to the support section 3), although the feeding rack 7 will pass through the support plate 41, the feeding rack 7 is not subjected to a vertical downward traction force. The support plate 41 is supported by the support section 10, which allows the feeding rack 7 to slide safely and stably into the furnace body 1 on the upper guide rail section 4 for the quenching of parts.

[0021] In a preferred embodiment, the feeding mechanism 8 includes at least two sets of power sources 81 mounted on the railcar 61, a first crossbar 82 mounted on the output end of one of the power sources 81, a second crossbar 84 connected by a connecting rod 83, and at least two sets of docking blocks 85 mounted on the bottom of the feeding frame 7; the second crossbar 84 is aligned with the other power source 81, and the at least two sets of docking blocks 85 are detachably connected to the first crossbar 82 and the second crossbar 84 respectively, so that the power source 81 drives the feeding frame 7 to move between the support part 3, the upper guide rail part 4 and the lower guide rail part 5; Furthermore, each group of docking blocks 85 has at least 3 docking blocks, and the docking blocks 85 are made of metal; at least 3 docking slots 86 are provided on the first crossbar 82 and the second crossbar 84, and electromagnetic suction blocks are installed inside the docking slots 86; electromagnetic suction blocks are also installed at the output end of the power source 81 that is not connected to the second crossbar 84. Specifically, the two sets of power sources 81 are arranged symmetrically on the railcar 61. The power source 81 is preferably a multi-stage electric push rod, a multi-stage hydraulic cylinder, or other mechanical structure that can be vertically lifted and lowered. The first crossbar 82 is fixedly installed at the output end of the power source 81 on the right side. When the power source 81 is retracted to its shortest limit (initial position), the top height of the power source 81 is lower than the bottom height of the furnace body 1. When the railcar 61 moves the feeding rack 7 into the furnace body 1, the power source 81 located on the left side of the railcar 61 can move to the bottom of the furnace body 1. When the feeding rack 7 at mark 1 needs to be fed into the furnace body 1, the railcar 61 moves the two sets of power sources 81 directly below the feeding rack 7. The electromagnetic suction block at the output end of the power source 81 on the left is energized and can be attracted and fixed to the bottom of the second crossbar 84. The synchronous extension of the two sets of power sources 81 then drives the first crossbar 82 and the second crossbar 84 to move upwards synchronously, allowing the docking slots 86 on each crossbar to engage with the docking blocks 85 (at this time, the crossbars do not need to be attracted and fixed to the docking blocks 85). Thus, the railcar 61... When the trolley 61 moves towards the furnace body 1, the two power sources 81 push the feeding rack 7 through the first crossbar 82 and the second crossbar 84, causing the feeding rack 7 to move into the furnace body 1 on the upper guide rail 4. When the feeding rack 7 moves to the lifting docking assembly 9, the feeding mechanism 8 undergoes multiple state adjustments to ensure that the feeding rack 7 moving on the upper guide rail 4 is safely and accurately fed into the furnace body 1. This prevents the sealing door 2 from failing to seal accurately at the furnace opening due to the feeding rack 7 not being fully fed into the furnace body 1. The specific adjustments are as follows: First, the output end of the power source 81 on the left side disengages from the adsorption connection with the first crossbar 82, causing the output rod of the power source 81 on the left side to retract to its initial state. Then, as the railcar 61 continues to move to the left, the power source 81 on the right side will push the feeding rack 7 from the lifting docking assembly 9 to the support part 3 through the first crossbar 82 and the second crossbar 84. When the power source 81 on the right side moves to the furnace mouth of the furnace body 1, a second adjustment is required. The second time, the power source 81 on the right side needs to drive the second crossbar 84 and the first crossbar 82 to descend inside the furnace body 1, so that the docking block 85 is disengaged from the two crossbars. Then the railcar 61 drives the first crossbar 82 and the second crossbar 84 to move to the right, and moves the second crossbar 84 to align with the three docking blocks 85 on the bottom right side of the feeding rack 7. Then the output rod of the power source 81 on the right side is extended, so that the docking slot 86 opened on the second crossbar 84 is engaged with the docking block 85. At this time, there is a distance between the power source 81 on the right side and the furnace opening of the furnace body 1. The third time, the railcar 61 continues to move to the left. At this time, the power source 81 on the right will push the second crossbar 84 into the furnace body 1 through the first crossbar 82 and the connecting rod 83, so as to facilitate the accurate feeding of the feeding rack 7 into the furnace body 1 and achieve stable feeding processing of the feeding rack 7. The process of transferring the feeder 7 from the upper guide rail section 4 to the lower guide rail section 5 is as follows: First, after the parts inside the furnace body 1 have been quenched, the sealing door 2 will be opened by the elevator. Then, the railcar 61 will drive the second crossbar 84 to be inserted into the furnace body 1 and located below the feeding rack 7. At this time, the docking slot 86 on the second crossbar 84 will be aligned with the docking block 85 on the right side of the lower surface of the feeding rack 7. Then, the output end of the power source 81 on the right side will extend and cause the second crossbar 84 to be sleeved on the docking block 85. Then, the railcar 61 will move to the right on the ground rail 6. At this time, the power source 81 on the right side will drive the second crossbar 84 to move through the first crossbar 82 and the connecting rod 83, thereby moving the feeding rack 7 inside the furnace body 1 to the mark point 2 of the upper guide rail part 4. Second, at this time, the output end of the power source 81 on the right side is retracted, so that the second crossbar 84 is disengaged from the docking block 85. Then, the railcar 61 moves a small distance to the left, so that the first crossbar 82 and the second crossbar 84 are aligned with the two sets of docking blocks 85. First, the output end of the power source 81 on the right side is extended, so that the first crossbar 82 and the second crossbar 84 are respectively fitted onto the two sets of docking blocks 85, and the electromagnetic suction block in the docking slot 86 attracts and fixes the docking block 85. The output end of the power source 81 on the left side is also extended, so that it is attracted and fixed to the lower surface of the second crossbar 84. Then, when the output ends of the two power sources 81 are retracted synchronously, the first crossbar 82 and the second crossbar 84 will drive the feeding frame 7 to descend vertically, so that the wheel parts 72 on both sides are aligned with the lower guide rail part 5. When the feeding rack 7 descends vertically, the adsorption and fixation of the first crossbar 82 and the second crossbar 84 with the docking block 85 enables the two sets of power sources 81 to apply a vertical pulling force to the feeding rack 7 stably and safely, so that the feeding rack 7 can descend vertically stably and safely. Third, at this time, the control railcar 61 continues to move to the right. At this time, the two sets of power sources 81 will drive the feeding rack 7 to slide to the right onto the lower guide rail 5 (marked point 3) through the first crossbar 82 and the second crossbar 84. This allows the quenched parts to be placed on the lower guide rail 5 under the support of the feeding rack 7 until they are taken away for cooling. At this time, the first crossbar 82 and the second crossbar 84 disengage from the adsorption connection with the docking block 85, and the output ends of the two sets of power sources 81 are retracted again, causing the second crossbar 84 and the first crossbar 82 to move vertically downward. Then, the railcar 61 can move on the ground rail 6, allowing the feeding mechanism 8 to automatically transport the feeding rack 7 at the marked point 1 again.

[0022] In a preferred embodiment, the support part 10 includes a first support rod 101 fixedly mounted on the bottom of the support plate 41, a first support block 102 fixed on the inner side of the support leg, and an elastic member 103 sleeved on the first support rod 101 and connected at both ends to the first support block 102 and the support plate 41; while the first support rod 101 is movably passed through the first support block 102 and connected to a nut. Furthermore, the support part 10 also includes a U-shaped bracket 104 installed at the end of the lower guide rail part 5 for limiting the downward support plate 41. The support part 10 also includes a limiting block 105 that is hinged to the side wall of the cavity through a hinge column, and a torsion spring is installed between the hinge column and the limiting block 105. The support plate 41 has a notch 42 that cooperates with the limiting block 105. Specifically, at least two first support rods 101 are fixed on the bottom surface of each support plate 41. The elastic element 103 is preferably a spring structure. The U-shaped opening of the U-shaped bracket 104 is sleeved on the outside of the first support rod 101 without interfering with the normal compression and extension of the elastic element 103. The U-shaped bracket 104 is installed on the bottom surface of the lower guide rail 5 and is above the first support block 102. The limiting block 105, through the cooperation of the hinge column and the torsion spring, allows the limiting block 105 to rotate clockwise to the notch 42 and cannot rotate counterclockwise to be flush with the bottom of the U-shaped track groove. The length of the support plate 41 is greater than the maximum distance between any three wheel parts 72 on the same side of the feeding frame 7. Therefore, when the feeding rack 7 moves to the support plate 41, at least three wheels 72 will all enter the support plate 41. When the feeding rack 7 descends vertically, the support plate 41 will press down the first support rod 101, causing its bottom end to descend vertically on the first support block 102. The elastic element 103 will be compressed. When the support plate 41 moves to contact the U-shaped bracket 104, the U-shaped bracket 104 can provide limiting support for the descending support plate 41, so that the upper surface of the support plate 41 will be accurately aligned with the groove of the U-shaped track groove of the lower guide rail 5. Then, the railcar 61 will continue to move to the right and pull the feeding rack 7 onto the lower guide rail 5, so that the quenched parts can be accurately and quickly transferred from the upper guide rail 4 to the lower guide rail 5 following the feeding rack 7. When the feeding rack 7 is transferred to the lower guide rail 5, the support plate 41 will move upward under the elastic restoring force of the elastic member 103. However, after the nut at the bottom end of the first support rod 101 comes into contact with the bottom surface of the first support block 102, the support plate 41 rises to be flush with the U-shaped track groove of the upper guide rail 4, so that the feeding rack 7 located at the mark point 1 can safely enter the furnace body 1 through the support plate 41. When the feeding rack 7, which holds the parts to be quenched, moves to the left from the mark point 1 and enters the furnace body 1, the wheel 72 on the left side will contact the limiting block 105, causing the limiting block 105 to rotate clockwise around the hinge column and press down into the notch 42, thus facilitating the stable and safe movement of the feeding rack 7 onto the support plate 41, and then into the furnace body 1. When the feeding rack 7 has completely moved to the left side of the support plate 41, the limiting block 105 will rotate into a vertical state through the force of the torsion spring. When the feeding rack 7 is taken out from the furnace body 1, and moves to the mark point 2 on the upper guide rail 4, the wheel 72 on the right side of the feeding rack 7 will come into contact with the limit block 105. Since the limit block 105 cannot rotate counterclockwise, the vertical limit block 105 will limit and block the feeding rack 7 moving to the right on the upper guide rail 4, so that the feeding rack 7 taken out from the furnace body 1 can only move to the support plate 41 and then descend vertically for transfer, and cannot continue to move to the right on the upper guide rail 4. Therefore, the two sets of feeding racks 7 on the upper guide rail 4 will not collide.

[0023] In a preferred embodiment, the lifting docking assembly 9 includes a frame 91 fixed on the ground, a second support rod 92 mounted on the frame 91, a U-shaped docking frame 93 mounted at the furnace opening and docking with the upper guide rail part 4 and the bracket part 3, a second support block 94 mounted outside the U-shaped docking frame 93, and an elastic member 103 connected to the second support block 94 and the frame 91. The top end of the second support rod 92 moves through the second support block 94. The U-shaped docking frame 93 is located below the sealing door 2, and the sealing door 2 is provided with a guide hole that cooperates with the second support rod 92. Specifically, the elastic element 103 is also spring-shaped and is sleeved on the second support rod 92. The bottom end of the second support rod 92 is fixedly installed on the frame 91. The bottom of the U-shaped docking frame 93 has a protrusion extending outward from the side near the upper guide rail 4. Therefore, when the sealing door 2 descends vertically and contacts the U-shaped docking frame 93, the top end of the second support rod 92 will be inserted into the guide hole through the rounded corner. As the sealing door 2 continues to descend, the U-shaped docking frame 93 will move vertically downward along the second support rod 92, and the elastic element 103 will be compressed, so that the movable docking U-shaped docking frame 93 will not hinder the sealing door 2 from properly sealing the furnace opening. When the sealing door 2 is opened and the feeding rack 7 inside the furnace body 1 is taken out, the vertical upward movement of the sealing door 2 will release the pressure on the U-shaped docking frame 93. Therefore, the elastic restoring force of the elastic element 103 sleeved on the second support rod 92 will cause the U-shaped docking frame 93 to rise vertically. When the protrusion touches the bottom surface of the upper guide rail part 4, the U-shaped docking frame 93 will no longer move upward, which facilitates the accurate and quick docking of the upper guide rail part 4 and the support part 3, so that the feeding rack 7 can be stably and safely taken out from or fed into the furnace body 1. The second support block 94 is installed on the outer side of the U-shaped docking frame 93, and the second support rod 92 is movably inserted into the guide hole. Therefore, this structure will not hinder the normal sealing of the furnace opening by the sealing door 2.

[0024] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0025] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An automatic conveying device for entering and exiting a quenching furnace, comprising a furnace body and a sealing door installed at the furnace opening of the furnace body; characterized in that, Also includes: The support structure is symmetrically installed inside the furnace body; The upper guide rail section is symmetrically fixed to the furnace opening extension of the furnace body via support legs; The lower guide rail section is symmetrically fixed to the lower part of the upper guide rail section via support legs; The feeding rack moves on the support section, the upper guide rail section and the lower guide rail section, and is used to carry and unload quenched parts. The ground track is laid on the ground at the bottom of the furnace body and extends away from the furnace opening. A railcar is installed on a ground rail, allowing it to move along the rail. The feeding mechanism, mounted on a railcar, is used to drive the feeding rack to automatically enter and exit the furnace body; And a lifting docking assembly, which is installed at the furnace opening of the furnace body to connect the support part and the upper guide rail part; The support section, the upper guide rail section and the lower guide rail section are all provided with U-shaped track grooves with open ends on their corresponding side walls; The feeding rack is equipped with multiple sets of shafts, and each set of shafts is equipped with a wheel via a bearing, and the wheel slides in a U-shaped track groove. The bottom of the U-shaped track groove of the upper guide rail section is provided with a through cavity, and a support plate is movably installed in the through cavity through a support part. When the feeding rack moves to the support plate position, the feeding mechanism is used to move the quenched feeding rack down to the lower guide rail section. The support includes a first support rod fixedly mounted on the bottom of the support plate, a first support block fixed on the inside of the support leg, and an elastic member sleeved on the first support rod and connected at both ends to the first support block and the support plate; while the first support rod movably passes through the first support block and is connected to a nut. The support section also includes a U-shaped bracket installed at the end of the lower guide rail section for limiting the downward support plate. The support also includes a limiting block that is hinged to the side wall of the cavity via a hinged column, and a torsion spring is installed between the hinged column and the limiting block. The support plate has a notch or groove that mates with the limiting block.

2. The automatic conveying device for entering and exiting a quenching furnace according to claim 1, characterized in that, The end of the lower guide rail is flush with the cavity opening in the direction away from the furnace opening, and the lower guide rail extends in the direction away from the furnace opening. The length of the ground rail extending in the direction away from the furnace opening is greater than the length of the lower guide rail extending in the direction away from the furnace opening.

3. The automatic conveying device for entering and exiting a quenching furnace according to claim 1, characterized in that, The feeding mechanism includes two sets of power sources mounted on the railcar, a first crossbar mounted on the output end of one of the power sources, a second crossbar connected by a connecting rod, and at least two sets of docking blocks mounted on the bottom of the feeding frame. The second crossbar is aligned with another power source, and at least two sets of docking blocks are detachably connected to the first and second crossbars respectively, so that the power source drives the feeding frame to move between the support section, the upper guide rail section and the lower guide rail section.

4. The automatic conveying device for entering and exiting a quenching furnace according to claim 1, characterized in that, The lifting docking assembly includes a frame fixed on the ground, a second support rod installed on the frame, a U-shaped docking frame installed at the furnace opening and docking with the upper guide rail and support, a second support block installed outside the U-shaped docking frame, and an elastic element connected to the second support block and the frame. The top end of the second support rod moves through the second support block, the U-shaped docking frame is located below the sealing door, and the sealing door is provided with a guide hole that cooperates with the second support rod.

5. The automatic conveying device for entering and exiting a quenching furnace according to claim 3, characterized in that, The number of docking blocks in each group is at least 3, and the docking blocks are made of metal; at least 3 docking slots are provided on the first crossbar and the second crossbar, and electromagnetic suction blocks are installed inside the docking slots; electromagnetic suction blocks are also installed on the output end of the power source that is not connected to the second crossbar.

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