Slow-cooling lifting quenching system of heat treatment multipurpose furnace

Abstract

The utility model discloses a heat treatment multi-purpose furnace slow cooling lifting quenching system which comprises a quenching furnace with an inlet and an outlet in the middle, a quenching chamber is arranged at the bottom in the quenching furnace, a material transferring chamber is arranged in the middle of the quenching furnace, and a slow cooling chamber is arranged at the top of the quenching furnace. The switching mechanism is positioned outside the quenching furnace and is used for driving the lifting platform to be switched among the quenching chamber, the material transferring chamber and the slow cooling chamber; the switching mechanism comprises a driving mechanism located at the outer top of the quenching furnace and a lifting transmission mechanism extending into the quenching furnace to be connected with the lifting table, and a sealing assembly is arranged at the position, penetrating through the furnace wall of the quenching furnace, of the lifting transmission mechanism; the lifting table is provided with an upper material loading table and a lower material loading table which are arranged up and down. The workpiece can be slowly cooled, transferred and quenched in the quenching furnace, so that the occupied space is reduced, the times of entering and exiting from the furnace of the to-be-treated workpiece are reduced, the technological process is simplified, and the working efficiency of heat treatment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat treatment equipment, in particular to a slow cooling lifting and quenching system for a heat treatment multi-purpose furnace. Background Art

[0002] During the heat treatment process of the carburized workpiece, the carburized workpiece needs to be cooled before being heated and quenched. The current slow cooling chamber is mostly set outside the multi-purpose furnace. The workpiece to be processed needs to be slowly cooled outside the multi-purpose furnace, which increases the number of times the workpiece is moved out of the multi-purpose furnace and the heat treatment process time of the entire workpiece is long. Therefore, it is necessary to study a multi-purpose furnace mechanism with a slow cooling structure to reduce the workpiece movement and improve work efficiency. Utility Model Content

[0003] In view of the above problems, the purpose of the utility model is to provide a heat treatment multi-purpose furnace slow cooling lifting quenching system with slow cooling and reducing the number of times workpieces are transported out of the multi-purpose furnace.

[0004] The technical solution to realize the utility model is as follows

[0005] A multi-purpose heat treatment furnace slow cooling lifting quenching system comprises a quenching furnace with an inlet and outlet in the middle, the bottom of the quenching furnace is a quenching chamber, the middle is a material transfer chamber, and the top is a slow cooling chamber. A lifting platform is arranged in the quenching furnace, and a switching mechanism is located outside the quenching furnace and is used to drive the lifting platform to switch between the quenching chamber, the material transfer chamber, and the slow cooling chamber; the switching mechanism comprises a driving mechanism located at the top outside the quenching furnace, a lifting transmission mechanism extending into the quenching furnace and connected to the lifting platform, and a sealing component is arranged at the place where the lifting transmission mechanism passes through the furnace wall of the quenching furnace; the lifting platform is provided with an upper loading platform and a lower loading platform arranged up and down.

[0006] In a further solution of the present application: the driving mechanism includes a driving motor and a driving shaft, the lifting transmission mechanism includes a sprocket chain set and a lifting rod, the driving motor is mounted on the top outside the quenching furnace, the driving shaft is arranged transversely on the top outside the quenching furnace, on one side of the driving motor, and the driving motor and the driving shaft are transmitted through a transmission assembly;

[0007] Sprocket chain groups are respectively arranged at both ends of the driving shaft, the lower end of the sprocket chain group is connected to the lifting rod, the lifting rod passes through the quenching furnace wall and is connected to the lifting platform, and the sealing component is arranged between the lifting rod and the quenching furnace.

[0008] In a further scheme of the present application: the upper loading platform and the lower loading platform are fixedly connected by a connecting bracket, and guide roller groups with the same transmission direction are respectively arranged on the upper loading platform and the lower loading platform; baffles are respectively arranged on both sides of the upper loading platform and the lower loading platform to block the material frames transmitted by their respective guide roller groups; a support platform is arranged at the bottom of the quenching chamber, and a height adjuster cooperating with the support platform is arranged below the lower loading platform.

[0009] In a further scheme of the present application: at least one lifting guide structure is arranged in the quenching furnace in the lifting direction of the lifting platform, and the lifting guide structure includes a guide body and a guide base. The guide base is arranged along the lifting direction of the lifting platform, and the guide body is arranged on the lifting platform. The guide base is assembled on the inner periphery of the quenching furnace, and the guide body and the guide base adopt rolling fit or sliding fit.

[0010] In a further scheme of the present application: the sealing assembly includes a fixed ring, a lower pressure ring, a sealing sleeve, and an upper pressure ring through which the lifting rod passes; a through hole with a coaxial centerline is formed in the middle of the fixed ring, the lower pressure ring, and the upper pressure ring; the fixed ring is fixed to the outside of the quenching furnace, and the clearance hole on the wall of the quenching furnace for the lifting rod to pass through is covered therein, the lower pressure ring is assembled on the fixed ring, the lower end of the sealing sleeve is connected to the lower pressure ring, the upper end of the sealing sleeve is connected to the upper pressure ring, and the upper pressure ring and the lower pressure ring are connected by an adjustable height bolt connection group.

[0011] In a further scheme of the present application: the bolt connection assembly includes an upper fixing block fixed on an upper pressure ring, a lower fixing block fixed on a lower pressure ring, a screw rod whose upper end passes through the upper fixing block and is located above the upper fixing block and whose lower end passes through the lower fixing block and is located below the lower fixing block, and locking nuts that respectively lock the two ends of the screw rod to the upper fixing block and the lower fixing block.

[0012] In a further scheme of the present application: the sealing assembly also includes a liquid storage ring and a liquid injection ring located above the upper pressure ring; the lower surface of the liquid storage ring fits the upper surface of the upper pressure ring, and the upper surface of the liquid storage ring fits the lower surface of the liquid injection ring; an annular liquid storage cavity is formed between the inner periphery of the liquid storage ring and the outer periphery of the lifting rod, and a liquid storage filler is arranged in the liquid storage cavity; an injection tube is installed on the injection ring to inject liquid into the injection gap formed between the inner periphery of the liquid injection ring and the outer periphery of the lifting rod; the liquid storage cavity and the liquid injection gap are connected.

[0013] By adopting the above technical scheme, the material frame carrying the workpiece to be processed enters the transfer chamber from the inlet, and then enters the heat treatment chamber in the multi-purpose furnace through the outlet. After heat treatment, it returns to the transfer chamber, and then the lifting platform is switched to the quenching chamber or the slow cooling chamber through the switching mechanism. By setting the upper loading platform and the lower loading platform, two material frames can be placed at the same time, and the flow between the three chambers can be met by setting the two loading platforms. The workpiece can be slowly cooled, transferred, and quenched in the quenching furnace, which reduces space occupancy, reduces the number of times the workpiece to be processed enters and exits the furnace, simplifies the process flow and improves the work efficiency of heat treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is an internal schematic diagram of the material feeding and discharging direction of the utility model;

[0015] Figure 2It is an internal schematic diagram of the utility model in the width direction;

[0016] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of part A;

[0017] Figure 4 for Figure 2 A schematic diagram of the enlarged structure of part B in FIG.

[0018] Figure 5 It is a schematic diagram of the lifting platform in the utility model;

[0019] In the attached drawings, 10, inlet, 11, outlet, 12, quenching furnace, 13, quenching chamber, 14, material transfer chamber, 15, slow cooling chamber, 16, material frame, 17, sealing assembly, 18, upper loading platform, 19, lower loading platform, 20, driving motor, 21, driving shaft, 22, sprocket chain assembly, 23, lifting rod, 24, transmission assembly, 25, connecting chain, 26, connecting rod, 27, connecting bracket, 28, guide roller assembly , 29, baffle, 30, support table, 31, height adjuster, 32, guide body, 33, guide base, 34, mounting seat, 35, rolling groove, 36, fixing ring, 37, lower pressure ring, 38, sealing sleeve, 39, upper pressure ring, 40, clearance hole, 41, upper fixing block, 42, lower fixing block, 43, screw, 44, locking nut, 45, liquid storage ring, 46, liquid injection ring, 47, liquid storage filler, 48, liquid injection tube. DETAILED DESCRIPTION

[0020] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0021] The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship. The reference to "embodiment" in this application means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0022] See also Figure 1As shown in FIG. 5 , a multi-purpose heat treatment furnace slow cooling lifting quenching system comprises a quenching furnace 12 with an inlet 10 and an outlet 11 in the middle, the bottom of the quenching furnace 12 is a quenching chamber 13, the middle is a material transfer chamber 14, and the top is a slow cooling chamber 15. The quenching chamber, the material transfer chamber, and the slow cooling chamber are integrated in the quenching furnace in a bottom-middle-top manner to reduce space occupation, a lifting platform is arranged in the quenching furnace 12, the lifting platform is used to carry a material frame 16 with heat treatment workpieces, and a switching mechanism is located outside the quenching furnace 12 for driving the lifting platform to switch between the quenching chamber 13, the material transfer chamber 14, and the slow cooling chamber 15; the switching mechanism comprises a driving mechanism located at the top outside the quenching furnace 12, a lifting transmission mechanism extending into the quenching furnace 12 and connected to the lifting platform, and a sealing assembly 17 is provided at the place where the lifting transmission mechanism passes through the furnace wall of the quenching furnace 12 to ensure the sealing of the quenching furnace 12; the lifting platform is provided with an upper loading platform 18 and a lower loading platform 19 arranged up and down. The material frame 16 carrying the workpiece to be processed enters the transfer chamber 14 from the inlet 10, and then enters the heat treatment chamber in the multi-purpose furnace through the outlet 11. After heat treatment, it returns to the transfer chamber 14, and then the lifting platform is switched to the quenching chamber 13 or the slow cooling chamber 15 through the switching mechanism, which is specifically operated according to the heat treatment process of the workpiece to be processed. By setting the upper loading platform 18 and the lower loading platform 19, two material frames 16 can be placed at the same time, and the flow between the three chambers can be satisfied by setting the two loading platforms. Quenching liquid is stored in the quenching chamber 13, and the material frame 16 with the workpiece to be processed is immersed in the quenching liquid for quenching treatment. A cooling fan is set at the top of the slow cooling chamber 15 to speed up the cooling of the workpiece to be processed entering the slow cooling chamber 15.

[0023] In the implementation of the present application, the driving mechanism includes a driving motor 20 and a driving shaft 21, and the lifting transmission mechanism includes a sprocket chain group 22 and a lifting rod 23. The driving motor 20 is installed on the top outside the quenching furnace 12, and the driving shaft 21 is arranged horizontally on the top outside the quenching furnace 12, and is located on one side of the driving motor 20. The driving motor 20 and the driving shaft 21 are transmitted through a transmission component 24 (a sprocket chain or a gear group or a transmission pulley); sprocket chain groups 22 are respectively arranged at both ends of the driving shaft 21, and the lower end of the sprocket chain group 22 is connected to the lifting rod 23, and the lifting rod 23 passes through the furnace wall of the quenching furnace 12 to form a connection with the lifting platform. The lower end of the lifting rod 23 is equipped with a connecting chain 25, and the lower end of the connecting chain 25 is equipped with a connecting rod 26, which is connected to the lifting platform, so that the lifting rod 23 and the lifting platform are connected flexibly, reducing the wear of the lifting rod 23 caused by the fixed connection between the lifting rod 23 and the lifting platform; the driving motor 20 drives the driving shaft 21 to rotate through the transmission of the transmission assembly 24, and the rotational force of the driving shaft 21 is transmitted to the sprocket chain group 22 to realize the up and down movement of the chain in the sprocket chain group 22, and the lifting action of the lifting platform is driven by the transmission of the lifting rod 23, the connecting chain 25, and the connecting rod 26. Of course, a vertically arranged oil cylinder (pneumatic cylinder) can also be used here to drive the lifting action of the lifting platform, but if an oil cylinder (pneumatic cylinder) is used, a large vertical space needs to be occupied.

[0024] In the embodiment of the present application, the upper loading platform 18 and the lower loading platform 19 are fixedly connected by a connecting bracket 27, and guide roller groups 28 with the same transmission direction are respectively arranged on the upper loading platform 18 and the lower loading platform 19; baffles 29 for blocking the material frame 16 transmitted by the respective guide roller groups 28 are respectively arranged on both sides of the upper loading platform 18 and the lower loading platform 19; a support platform 30 is arranged at the bottom of the quenching chamber 13, and a height adjuster 31 cooperating with the support platform 30 is arranged below the lower loading platform 19. The height adjuster 31 includes an adjusting bolt arranged downward, and a locking nut threadedly connected to the adjusting bolt for adjusting the extending position of the adjusting bolt. Through the arrangement of the height adjuster, the position of the lower loading platform 19 in the quenching chamber 13 can be adjusted to adjust the guide roller group 28 on the upper loading platform 18 when it is in the transfer chamber 14. It can be at the same height as the guide roller group at the inlet and outlet of the quenching furnace 12 to ensure the smoothness of material entry and exit.

[0025] In the embodiment of the present application, there is a lifting guide structure on both sides of the quenching furnace 12 in the lifting direction of the lifting platform, and the lifting guide structure includes a guide body 32 and a guide base 33. The guide base 33 is arranged along the lifting direction of the lifting platform. The guide body 32 is set on the lifting platform, and the guide base 33 is assembled on the inner periphery of the quenching furnace 12. The guide body 32 and the guide base 33 adopt rolling or sliding cooperation. The guide body 32 shown in the drawings of the present application is a roller assembled on the side of the lifting platform through a mounting seat 34, and the guide base 33 is a groove rail with a rolling groove 35 vertically assembled on the inner wall of the quenching furnace 12. The roller rolls up and down in the rolling groove 35 to ensure the stability of the lifting platform when the lifting platform moves up and down; in another implementation, the guide body 32 can be a slider assembled on the side of the lifting platform, and the guide base 33 is a slide rail vertically assembled on the inner wall of the quenching furnace 12. The slider and the slide rail slide together to provide stable guidance during the lifting process of the lifting platform.

[0026] In the embodiment of the present application, the sealing assembly 17 is arranged between the lifting rod 23 and the quenching furnace 12. The sealing assembly 17 includes a fixing ring 36, a lower pressure ring 37, a sealing sleeve 38, and an upper pressure ring 39 for the lifting rod 23 to pass through; the fixing ring 36, the lower pressure ring 37, and the upper pressure ring 39 are through holes with coaxial center lines; the fixing ring 36 is welded and fixed to the outside of the quenching furnace 12, and the fixing ring 36 covers the clearance hole 40 on the furnace wall of the quenching furnace 12 for the lifting rod 23 to pass through, the lower pressure ring 37 is assembled above the fixing ring 36 by bolts, the lower surface of the lower pressure ring 37 is fitted with the upper surface of the fixing ring 36 to form a seal, the lower end of the sealing sleeve 38 is fixedly connected to the lower pressure ring 37, the upper end of the sealing sleeve 38 is fixedly connected to the upper pressure ring 39, and the upper pressure ring 39 is connected to the lower pressure ring 37 by an adjustable height bolt connection group to adaptively adjust the height between the upper pressure ring 39 and the lower pressure ring 37 according to the length of the sealing sleeve 38.

[0027] In the embodiment of the present application, the bolt connection assembly includes an upper fixing block 41 fixed to the side of the upper pressure ring 39, a lower fixing block 42 fixed to the side of the lower pressure ring 37, and a screw rod 43 whose upper end passes through the upper fixing block 41 and is located above the upper fixing block 41, and whose lower end passes through the lower fixing block 42 and is located below the lower fixing block 42, and a locking nut 44 that locks the two ends of the screw rod 43 to the upper fixing block 41 and the lower fixing block 42, respectively. By adjusting the position of the locking nut 44 on the screw rod 43, the distance between the upper pressure ring 39 and the lower pressure ring 37 can be adjusted.

[0028] Among them, the sealing assembly 17 also includes a liquid storage ring 45 and a liquid injection ring 46 located above the upper pressure ring 39; the liquid storage ring 45, the liquid injection ring 46 and the upper pressure ring 39 are fixedly connected by bolts; the lower surface of the liquid storage ring 45 fits the upper surface of the upper pressure ring 39 and is equipped with a sealing ring, and the upper surface of the liquid storage ring 45 fits the lower surface of the liquid injection ring 46 and is equipped with a sealing ring; an annular liquid storage cavity is formed between the inner periphery of the liquid storage ring 45 and the outer periphery of the lifting rod 23, and a liquid storage filler 47 is arranged in the liquid storage cavity. The liquid storage filler 47 is used to absorb the liquid entering the liquid storage cavity, such as a ring-shaped filler made of oil-absorbing cotton; an injection tube 48 is installed on the injection ring 46 for injecting liquid into the injection gap formed between the inner periphery of the liquid injection ring 46 and the outer periphery of the lifting rod 23, and the liquid storage cavity and the injection gap are connected. The oil enters the injection gap from the injection pipe and then enters the liquid storage cavity, where it is adsorbed by the liquid storage filler 47 , so that the oil remains in the liquid storage cavity for a long time to lubricate the outer wall of the lifting rod 23 .

[0029] Finally, it should be noted that the above embodiments are merely preferred embodiments of the present invention to illustrate the technical solution of the present invention, but are not intended to limit the technical solution, let alone the patent scope of the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features may be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention. In addition, the direct or indirect application of the technical solution of the present invention in other related technical fields is also included in the patent protection scope of the present invention.

Claims

1. A multi-purpose heat treatment furnace slow cooling lifting quenching system, comprising a quenching furnace with an inlet and outlet in the middle, characterized in that: The bottom of the quenching furnace is the quenching chamber, the middle is the material transfer chamber, and the top is the slow cooling chamber. A lifting platform is arranged in the quenching furnace, and a switching mechanism is located outside the quenching furnace and is used to drive the lifting platform to switch between the quenching chamber, the material transfer chamber and the slow cooling chamber; the switching mechanism includes a driving mechanism located at the top outside the quenching furnace, a lifting transmission mechanism extending into the quenching furnace and connected to the lifting platform, and a sealing assembly is arranged at the place where the lifting transmission mechanism passes through the furnace wall of the quenching furnace; the lifting platform is provided with an upper loading platform and a lower loading platform arranged up and down.

2. The multi-purpose heat treatment furnace slow cooling lifting quenching system according to claim 1, characterized in that: The driving mechanism includes a driving motor and a driving shaft, and the lifting transmission mechanism includes a sprocket chain group and a lifting rod. The driving motor is installed on the top outside the quenching furnace, and the driving shaft is arranged horizontally on the top outside the quenching furnace and is located on one side of the driving motor. The driving motor and the driving shaft are transmitted through a transmission assembly. Sprocket chain groups are respectively arranged at both ends of the driving shaft, the lower end of the sprocket chain group is connected to the lifting rod, the lifting rod passes through the quenching furnace wall and is connected to the lifting platform, and the sealing component is arranged between the lifting rod and the quenching furnace.

3. The multi-purpose heat treatment furnace slow cooling lifting quenching system according to claim 1, characterized in that: The upper loading platform and the lower loading platform are fixedly connected by a connecting bracket, and guide roller groups with the same transmission direction are respectively arranged on the upper loading platform and the lower loading platform; baffles are respectively arranged on both sides of the upper loading platform and the lower loading platform to block the material frames transmitted by their respective guide roller groups; a support platform is arranged at the bottom of the quenching chamber, and a height adjuster cooperating with the support platform is arranged below the lower loading platform.

4. The multi-purpose heat treatment furnace slow cooling lifting quenching system according to claim 1, characterized in that: At least one lifting guide structure is arranged in the lifting direction of the lifting platform in the quenching furnace. The lifting guide structure includes a guide body and a guide base. The guide base is arranged along the lifting direction of the lifting platform. The guide body is arranged on the lifting platform. The guide base is assembled on the inner periphery of the quenching furnace. The guide body and the guide base adopt rolling fit or sliding fit.

5. The multi-purpose heat treatment furnace slow cooling lifting quenching system according to claim 1, characterized in that: The sealing assembly includes a fixed ring, a lower pressure ring, a sealing sleeve, and an upper pressure ring through which the lifting rod passes; a through hole with a coaxial centerline is formed in the middle of the fixed ring, the lower pressure ring, and the upper pressure ring; the fixed ring is fixed to the outside of the quenching furnace, and the hole on the wall of the quenching furnace through which the lifting rod passes is covered. The lower pressure ring is assembled on the fixing ring, the lower end of the sealing sleeve is connected to the lower pressure ring, the upper end of the sealing sleeve is connected to the upper pressure ring, and the upper pressure ring and the lower pressure ring are connected by a height-adjustable bolt connection group.

6. The multi-purpose heat treatment furnace slow cooling lifting quenching system according to claim 5, characterized in that: The bolt connection assembly includes an upper fixing block fixed on an upper pressure ring, a lower fixing block fixed on a lower pressure ring, a screw rod whose upper end passes through the upper fixing block and is located above the upper fixing block and whose lower end passes through the lower fixing block and is located below the lower fixing block, and locking nuts that respectively lock the two ends of the screw rod to the upper fixing block and the lower fixing block.

7. The multi-purpose heat treatment furnace slow cooling lifting quenching system according to claim 1, characterized in that: The sealing assembly also includes a liquid storage ring and a liquid injection ring located above the upper pressure ring; the lower surface of the liquid storage ring fits the upper surface of the upper pressure ring, and the upper surface of the liquid storage ring fits the lower surface of the liquid injection ring; an annular liquid storage cavity is formed between the inner periphery of the liquid storage ring and the outer periphery of the lifting rod, and a liquid storage filler is arranged in the liquid storage cavity; an injection tube is installed on the liquid injection ring to inject liquid into the liquid injection gap formed between the inner periphery of the liquid injection ring and the outer periphery of the lifting rod; the liquid storage cavity and the liquid injection gap are connected.

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