Feeding and discharging buffering platform of heat treatment multi-purpose furnace

Abstract

The utility model discloses a feeding and discharging buffer platform of a heat treatment multipurpose furnace, which belongs to the technical field of heat treatment equipment, and is characterized by comprising a heat treatment furnace, and by arranging a movable buffer mechanism, full-automatic feeding and discharging and dynamic buffer protection of a workpiece shelf can be realized; when the workpiece placing frame with workpieces is hoisted to the top of the carrying and moving structure, the buffering hydraulic rods in the grooves of the translation plates and the springs form a dynamic buffering structure, flexible supporting is formed for the workpiece placing frame through hydraulic stretching and spring deformation, deformation caused by uneven load bearing of a tray is effectively relieved, rigid collision between the workpieces is reduced, and the service life of the workpiece placing frame is prolonged. And then the reciprocating motor is driven by the controller to drive the lead screw to rotate, the translation plate is made to move front and back in the horizontal direction, the workpiece containing frame is accurately controlled to be transferred to and retreat from the heat treatment furnace, when feeding is needed, the workpiece containing frame is driven by the translation plate to move backwards to be in butt joint with the front side of the heat treatment furnace, and the workpiece containing frame is pushed into the furnace through the carrying and transferring structure and disconnected.

Description

Technical Field

[0001] This utility model relates to the field of heat treatment equipment technology, and in particular to a feeding and discharging buffer platform for a multi-purpose heat treatment furnace. Background Technology

[0002] A heat treatment furnace refers to an electric or fuel-fired furnace used for heating furnace materials for heat treatment. Commonly used heat treatment furnaces include box-type resistance furnaces, pit-type resistance furnaces, gas carburizing furnaces, and salt bath furnaces. Continuous furnaces are typically used, where workpieces are continuously loaded through the feeding door, pass through the furnace chamber, and are continuously discharged through the discharge door. The commonly used method of conveying workpieces within the furnace is to place them on heat-resistant steel guide rails and move them using a walking beam or push rod. In recent years, heat-resistant steel conveyor belts have been increasingly adopted for material transport. This makes the heat treatment operation more rational and greatly increases the possibility of automation and unmanned management of the heat treatment process.

[0003] Existing multi-purpose heat treatment furnaces have some problems in use. For example, existing heat treatment furnaces require workpieces to be put into the furnace by trolleys, but when encountering steel pipe type workpieces, the workpieces are easy to roll, and the number that can be loaded at one time is relatively small, which affects work efficiency.

[0004] An existing patent (publication number: CN215983966U) discloses a feeding and discharging buffer platform for a multi-purpose heat treatment furnace. This utility model is equipped with a discharging platform, on which a semi-circular groove adapted to steel pipes is opened. The V-shaped buffer plate, in conjunction with the semi-circular groove, enables the platform to place steel pipe-type workpieces.

[0005] To address the aforementioned issues, existing patents have provided solutions. However, existing multi-purpose heat treatment furnaces have significant defects in the loading and unloading process. When the workpiece pallets remain on the platform, they lack a dynamic buffer support mechanism, making the pallets prone to deformation due to uneven load distribution. Furthermore, the workpieces may be damaged by collisions due to rigid contact. In addition, the platform does not integrate an automated horizontal movement system, requiring manual or semi-manual operation to complete the loading and unloading process. This results in an unsmooth loading and unloading process, extended production cycle time, and reduced processing efficiency.

[0006] Therefore, a buffer platform for feeding and discharging materials in a multi-purpose heat treatment furnace is proposed. Utility Model Content

[0007] The purpose of this utility model is to provide a feeding and discharging buffer platform for a multi-purpose heat treatment furnace, which can solve the significant defects of existing multi-purpose heat treatment furnaces in the feeding and discharging process. The workpiece pallets lack a dynamic buffer support mechanism when they stay on the platform, and the pallets are prone to deformation due to uneven load. Furthermore, the workpieces may be damaged by collision due to rigid contact. At the same time, the platform does not integrate an automated horizontal movement system, and the feeding and discharging process needs to be completed manually or semi-manually, which results in an unsmooth feeding and discharging process, extended production cycle, and reduced processing efficiency.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a feeding and discharging buffer platform for a multi-purpose heat treatment furnace, comprising a heat treatment furnace, a support platform provided on the front side of the heat treatment furnace, a controller provided on the left side of the support platform, a movable buffer mechanism provided on the top of the support platform, and a workpiece rack provided on the top of the movable buffer mechanism.

[0009] The moving buffer mechanism includes a reciprocating motor located at the front top of the support platform. A lead screw is fixedly connected to the output end of the reciprocating motor. A translation plate is threaded to the outer side of the lead screw. The translation plate is located at the top of the support platform. A groove is formed at the top of the translation plate. Buffer pressure rods are bolted to the four corners of the bottom side inside the groove. Springs are provided on the outer side of the buffer pressure rods. The bottom of the buffer pressure rods is bolted to the bottom side inside the groove. A transfer structure is provided at the top of the springs and the buffer pressure rods. The transfer structure is located at the bottom of the workpiece holder.

[0010] Preferably, the transfer structure includes an arc plate fixedly connected to the top of the spring and the telescopic rod, and a connecting block is fixedly connected to the front side of the bottom inside the arc plate.

[0011] Preferably, an electric telescopic rod is bolted to the front side of the connecting block, the telescopic end of the electric telescopic rod passes through the front side of the connecting block, a push-pull sleeve block is fixedly connected to the telescopic end of the electric telescopic rod, and electric push rods are fixedly connected to both sides of the rear side of the push-pull sleeve block. Both the electric push rods and the electric telescopic rod are electrically connected to the controller.

[0012] Preferably, an arc-shaped frame plate is slidably connected inside the arc plate, the inner side of the top of the arc-shaped frame plate contacts the bottom of the workpiece holder, a connecting block is fixedly connected to the front side of the bottom inside the arc-shaped frame plate, a slot is opened on the outer side of the connecting block, and a locking post is fixedly connected to the telescopic end of the electric push rod, the locking post being engaged inside the slot.

[0013] Preferably, the bottom of the translation plate is provided with sliding grooves on both sides, and the top of the support platform is bolted with guide rods on both sides, the guide rods being slidably connected inside the sliding grooves.

[0014] Preferably, each of the four corners of the top of the workpiece holder is welded with a hanging sleeve, and the hanging sleeve is in the shape of a semi-circular ring.

[0015] Preferably, the heat treatment furnace has an inlet and outlet on its front side, and a sealing door is rotatably connected to the front side of the heat treatment furnace, with the sealing door located in front of the inlet and outlet.

[0016] Preferably, the inlet and outlet are circular in shape, and the bottom side of the inlet and outlet is lower than the bottom of the arc-shaped frame plate.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This application, by setting up a moving buffer mechanism, can realize fully automatic feeding and unloading of the workpiece rack and dynamic buffer protection. When the workpiece rack with workpieces is hoisted to the top of the transfer structure, the buffer pressure rod and spring in the groove of the translation plate form a dynamic buffer structure. Through hydraulic extension and spring deformation, flexible support is provided for the workpiece rack, effectively alleviating deformation caused by uneven load on the pallet and reducing rigid collisions between workpieces. Then, the controller drives the reciprocating motor to rotate the lead screw, causing the translation plate to move back and forth in the horizontal direction, precisely controlling the workpiece rack towards the heat treatment furnace. The transfer and retraction are as follows: when loading is required, the translation plate moves the workpiece rack backward to dock with the front side of the heat treatment furnace. The workpiece rack is pushed into the furnace and disconnected through the transfer structure. When unloading, the operation is reversed to bring the processed workpiece rack back to the initial position. The entire process does not require manual intervention. Relying on the dynamic buffer support of the buffer pressure rod and spring, it not only ensures the stability of the horizontal transfer process, but also significantly shortens the production cycle through automated linkage, improves the loading and unloading efficiency, and reduces the risk of workpiece damage, thus achieving dual optimization of transmission efficiency and workpiece protection.

[0019] 2. This application sets up a transfer structure to form a linkage transmission system with the translation plate and the heat treatment furnace. When the translation plate moves the transfer structure to dock with the heat treatment furnace, the transfer structure accurately pushes the workpiece rack into the heat treatment furnace, disconnects some of its own structure, and reconnects with some of its own structure from inside the heat treatment furnace, thus taking the workpiece rack out. This makes the feeding and discharging process more efficient, stable and intelligent. Attached Figure Description

[0020] Figure 1 This is an overall structural diagram of the feeding and discharging buffer platform of the multi-purpose heat treatment furnace of this utility model;

[0021] Figure 2 This is a structural diagram of the heat treatment furnace of this utility model when it is open.

[0022] Figure 3 This is a structural diagram of the closed heat treatment furnace of this utility model;

[0023] Figure 4 This is a structural diagram of the movable buffer mechanism of this utility model;

[0024] Figure 5 This is a structural diagram of the transfer structure of this utility model.

[0025] In the diagram, 1. Heat treatment furnace; 2. Support platform; 3. Controller; 4. Moving buffer mechanism; 41. Reciprocating motor; 42. Lead screw; 43. Translation plate; 44. Groove; 45. Buffer pressure rod; 46. Spring; 47. Loading and transferring structure; 471. Arc plate; 472. Connecting block; 473. Electric telescopic rod; 474. Push-pull sleeve block; 475. Electric push rod; 476. Arc frame plate; 477. Connecting block; 478. Slot; 479. Slot; 5. Workpiece rack; 6. Slide groove; 7. Guide rod; 8. Lifting sleeve; 9. Inlet / outlet; 10. Sealing door. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-5 The present invention provides the following technical solution:

[0028] A multi-purpose heat treatment furnace feeding and discharging buffer platform includes a heat treatment furnace 1, a support platform 2 is provided on the front side of the heat treatment furnace 1, a controller 3 is provided on the left side of the support platform 2, a movable buffer mechanism 4 is provided on the top of the support platform 2, and a workpiece rack 5 is provided on the top of the movable buffer mechanism 4.

[0029] The moving buffer mechanism 4 includes a reciprocating motor 41 located on the front side of the top of the support platform 2. The output end of the reciprocating motor 41 is fixedly connected to a lead screw 42. A translation plate 43 is threadedly connected to the outer side of the lead screw 42. The translation plate 43 is located on the top of the support platform 2. A groove 44 is provided on the top of the translation plate 43. Buffer pressure rods 45 are bolted to the four corners of the bottom side inside the groove 44. A spring 46 is provided on the outer side of the buffer pressure rod 45. The bottom of the buffer pressure rod 45 is bolted to the bottom side inside the groove 44. A transfer structure 47 is provided on the top of the spring 46 and the buffer pressure rod 45. The transfer structure 47 is located at the bottom of the workpiece holder 5.

[0030] In this embodiment: by setting up a heat treatment furnace 1, a moving buffer mechanism 4, and a workpiece rack 5, after the workpiece rack 5 carries the workpiece to the transfer structure 47 at the top of the moving buffer mechanism 4, the buffer pressure rod 45 and spring 46 in the groove 44 of the translation plate 43 immediately provide dynamic support through elastic deformation, offsetting the stress caused by uneven workpiece weight, and preventing deformation of the workpiece rack 5 and workpiece collision. Subsequently, the controller 3 starts the reciprocating motor 41 to drive the lead screw 42 to rotate, driving the translation plate 43 to move horizontally backward along the support platform 2, so that the transfer structure 47 is precisely aligned with the front side of the heat treatment furnace 1. At this time, the transfer structure 47 pushes the workpiece rack 5 to the designated position inside the furnace through mechanical linkage and disconnects it. The translation plate 43 then drives the transfer structure 47 back to the initial position to wait. After the workpiece in the workpiece rack 5 has been heat-treated, the translation plate 43 drives the transfer structure 47 to move to the front of the heat treatment furnace 1 again. The transfer structure 47 then uses reverse mechanical linkage to place the workpiece rack 5 back. Throughout the process, the buffer pressure rod 45 and spring 46 continuously provide flexible support to ensure a smooth transfer process. At the same time, the controller 3 achieves full automation through programmed instructions, reducing manual intervention while improving feeding and discharging efficiency and process stability.

[0031] Specifically, such as Figure 5 As shown, the transfer structure 47 includes an arc plate 471 fixedly connected to the spring 46 and the top of the telescopic rod, and a connecting block 472 is fixedly connected to the front side of the bottom inside the arc plate 471.

[0032] Specifically, such as Figure 5 As shown, an electric telescopic rod 473 is bolted to the front side of the connecting block 472. The telescopic end of the electric telescopic rod 473 passes through the front side of the connecting block 472. A push-pull sleeve block 474 is fixedly connected to the telescopic end of the electric telescopic rod 473. Electric push rods 475 are fixedly connected to both sides of the rear side of the push-pull sleeve block 474. Both the electric push rods 475 and the electric telescopic rod 473 are electrically connected to the controller 3.

[0033] Specifically, such as Figure 5 As shown, an arc-shaped frame plate 476 is slidably connected inside the arc plate 471. The inner side of the top of the arc-shaped frame plate 476 contacts the bottom of the workpiece holder 5. A connecting block 477 is fixedly connected to the front side of the bottom inside the arc-shaped frame plate 476. A slot 478 is opened on the outer side of the connecting block 477. A locking post 479 is fixedly connected to the telescopic end of the electric push rod 475. The locking post 479 is locked inside the slot 478.

[0034] In this embodiment: by setting the transfer structure 47, the arc plate 471 is connected to the top of the buffer hydraulic rod 45 through the spring 46 to form an elastic bearing base. When the workpiece holder 5 is placed on the top of the arc frame plate 476, the weight is evenly distributed through the coordinated deformation of the spring 46 and the hydraulic rod. The electric telescopic rod 473 drives the push-pull sleeve block 474 to move back and forth, driving the electric push rods 475 on both sides to move synchronously. When the locking post 479 of the electric push rod 475 is inserted into the locking groove 478 of the bottom connecting block 477 inside the arc frame plate 476, it locks with the workpiece holder 5 located on the top of the arc frame plate 476. Then, the reciprocating motor 41 drives the translation plate 43 to move as a whole to the position of the heat treatment furnace 1. After reaching the docking position, The electric telescopic rod 473 extends, pushing the arc-shaped frame plate 476 along the arc plate 471 into the heat treatment furnace 1, thereby allowing the workpiece holder 5 located at the top of the arc-shaped frame plate 476 to enter the heat treatment furnace 1. At this time, the electric push rod 475 retracts, causing the locking post 479 to disengage from the locking slot 478, completing the release of the workpiece holder 5. During unloading, the reverse operation is used to re-lock the locking post 479 in the locking slot 478 of the bottom connecting block 477 inside the arc-shaped frame plate 476, bringing the workpiece holder 5 at the top of the arc-shaped frame plate 476 back. The entire process achieves precise gripping, transfer, and release of the workpiece holder 5 through the linkage of electric components and mechanical structure. The switching between elastic buffer and rigid connection ensures transmission stability and loading and unloading efficiency.

[0035] Specifically, such as Figure 4 As shown, sliding grooves 6 are provided on both sides of the bottom of the translation plate 43, and guide rods 7 are bolted to both sides of the top of the support platform 2. The guide rods 7 are slidably connected inside the sliding grooves 6.

[0036] Specifically, such as Figure 5 As shown, each of the four corners of the top of the workpiece holder 5 is welded with a hanging sleeve 8, which is in the shape of a semi-circular ring.

[0037] In this embodiment: by setting up a chute 6, a guide rod 7 and a lifting sleeve 8, the guide rod 7 at the top of the support platform 2 is inserted into the chute 6 at the bottom of the translation plate 43 to form a horizontal moving guide structure, which limits the offset of the translation plate 43 during the drive process of the lead screw 42, ensuring that it accurately docks with the heat treatment furnace 1 along a straight line, and improving the transfer positioning accuracy. The semi-circular ring lifting sleeve 8 at the top of the workpiece rack 5 facilitates the rapid lifting by a crane or robotic arm, realizing the pre-loading of the workpiece rack 5 before it goes online and the transfer after it goes offline, reducing the manual handling links. At the same time, the symmetrical distribution design of the lifting sleeve 8 ensures the balance of the center of gravity during lifting, avoiding the workpiece sliding or bumping caused by the tilt of the workpiece rack 5.

[0038] Specifically, such as Figure 1 , Figure 2 As shown, the heat treatment furnace 1 has an inlet / outlet 9 on the front side and a sealing door 10 is rotatably connected to the front side of the heat treatment furnace 1. The sealing door 10 is located in front of the inlet / outlet 9.

[0039] Specifically, such as Figure 2 As shown, the inlet / outlet 9 is circular in shape, and the bottom side inside the inlet / outlet 9 is lower than the bottom of the arc-shaped frame plate 476.

[0040] In this embodiment: by setting the inlet / outlet 9 and the sealing door 10, the circular inlet / outlet 9 on the front side of the heat treatment furnace 1 is height-matched with the bottom of the arc-shaped frame plate 476, ensuring that the workpiece rack 5 can be pushed horizontally and unobstructed into the heat treatment furnace 1, avoiding jamming or collision caused by height difference. At the same time, the arc-shaped frame plate 476 is higher than the inlet / outlet 9 whether it is entering or exiting. Furthermore, when the buffer pressure rod 45 supports the arc-shaped frame plate 476, its maximum height is always lower than the inlet / outlet 9, regardless of whether the arc-shaped frame plate 476 supports the workpiece rack 5. This makes the arc-shaped frame plate 476 slightly higher than the inlet / outlet 9, ensuring that the workpiece rack 5 will not jam when passing through the inlet / outlet 9. In addition, the sealing door 10 can be quickly opened and closed through a rotating connection. When the workpiece rack 5 enters the heat treatment furnace 1, the sealing door 10 fits tightly against the edge of the inlet / outlet 9 to prevent leakage of the heat treatment furnace 1 and intrusion of external air, maintain the temperature uniformity and process stability inside the heat treatment furnace 1, and reduce heat loss and energy consumption.

[0041] Working principle: During the use of the feed and discharge buffer platform of the multi-purpose heat treatment furnace, the workpiece rack 5 carrying the workpiece is first hoisted onto the arc-shaped frame plate 476 by a crane or robotic arm. At this time, the buffer pressure rods 45 at the four corners of the groove 44 in the translation plate 43 and the outer spring 46 undergo elastic deformation. After buffering, the buffer pressure rods 45 are still at the initial support height, forming a dynamic buffer support for the workpiece rack 5. This supports and distributes the weight of the workpiece, offsets stress, and prevents deformation of the workpiece rack 5 and collision of the workpiece. The controller 3 starts the reciprocating motor 41, and the lead screw 42 at its output end rotates to drive the threaded translation plate 43 to move horizontally backward along the support platform 2. The bottom slide groove 6 of the translation plate 43 and the support Platform 2's top guide rod 7 works in conjunction to ensure the translation plate 43 moves precisely along a straight line until the arc plate 471 and the arc frame plate 476 align with the inlet / outlet 9 on the front side of the heat treatment furnace 1. After alignment, the electric telescopic rod 473 extends, pushing the push-pull sleeve block 474 to move the electric push rods 475 on both sides forward. During this process, the locking pin 479 of the electric push rod 475 inserts into the locking groove 478 of the bottom connecting block 477 of the arc frame plate 476, rigidly locking the arc frame plate 476 and the workpiece holder 5. Subsequently, the electric telescopic rod 473 continues to extend, pushing the arc frame plate 476 and the workpiece holder 5 along the arc plate 471 to the inlet / outlet 9 inside the heat treatment furnace 1. Since the bottom side of the inlet / outlet 9 is lower than the arc frame plate... The bottom of plate 476, and the maximum height of the buffer pressure rod 45 when supported, is lower than the edge of the inlet / outlet 9, ensuring that the arc-shaped frame plate 476 can enter the heat treatment furnace 1 horizontally and unobstructed when it is made into the workpiece holder 5. After it is in place, the electric push rod 475 retracts, causing the locking post 479 to disengage from the locking slot 478, releasing the connection with the bottom arc-shaped frame plate 476 of the workpiece holder 5. The translation plate 43 drives the arc plate 471 and its top components back to the initial position. At the same time, the closed door 10 of the heat treatment furnace 1 closes, sealing the inlet / outlet 9, preventing the intrusion of outside air and maintaining the temperature uniformity and atmosphere stability inside the heat treatment furnace 1. After the workpiece heat treatment is completed, the closed door 10 opens, and the controller 3 drives the reciprocating motor 41 again. The movable translation plate 43 moves backward and aligns with the workpiece rack 5 inside the furnace. The electric push rod 475 extends, and the locking pin 479 re-inserts into the locking slot 478 to lock the workpiece rack 5. The electric telescopic rod 473 retracts, pulling the workpiece rack 5 out of the heat treatment furnace 1 onto the translation plate 43. Subsequently, the translation plate 43 drives the workpiece rack 5 back to its initial position, where it is hoisted by a crane to the next process. Throughout the process, the buffer pressure rod 45 and spring 46 continuously provide flexible support, while the guide rod 7 and slide 6 ensure translation accuracy. The linkage between the electric components and the mechanical structure enables fully automatic gripping, transfer, and release of the workpiece rack 5. The entire process is automated through programmed instructions from the controller 3, improving material feeding and unloading efficiency and process stability.

[0042] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A feed and discharge buffer platform for a multi-purpose heat treatment furnace, comprising a heat treatment furnace (1), characterized in that: A support platform (2) is provided on the front side of the heat treatment furnace (1), a controller (3) is provided on the left side of the support platform (2), a moving buffer mechanism (4) is provided on the top of the support platform (2), and a workpiece rack (5) is provided on the top of the moving buffer mechanism (4). The moving buffer mechanism (4) includes a reciprocating motor (41) located on the front side of the top of the support platform (2). The output end of the reciprocating motor (41) is fixedly connected to a lead screw (42). The outer side of the lead screw (42) is threadedly connected to a translation plate (43). The translation plate (43) is located on the top of the support platform (2). A groove (44) is provided on the top of the translation plate (43). Buffer pressure rods (45) are bolted to the four corners of the bottom side inside the groove (44). A spring (46) is provided on the outer side of the buffer pressure rod (45). The bottom of the buffer pressure rod (45) is bolted to the bottom side inside the groove (44). A transfer structure (47) is provided on the top of the spring (46) and the buffer pressure rod (45). The transfer structure (47) is located at the bottom of the workpiece holder (5).

2. The feed and discharge buffer platform for a multi-purpose heat treatment furnace according to claim 1, characterized in that: The transfer structure (47) includes an arc plate (471) fixedly connected to the spring (46) and the top of the telescopic rod, and a connecting block (472) is fixedly connected to the front side of the bottom inside the arc plate (471).

3. The feed and discharge buffer platform for a multi-purpose heat treatment furnace according to claim 2, characterized in that: An electric telescopic rod (473) is bolted to the front side of the connecting block (472). The telescopic end of the electric telescopic rod (473) passes through the front side of the connecting block (472). A push-pull sleeve block (474) is fixedly connected to the telescopic end of the electric telescopic rod (473). Electric push rods (475) are fixedly connected to both sides of the rear side of the push-pull sleeve block (474). Both the electric push rods (475) and the electric telescopic rod (473) are electrically connected to the controller (3).

4. The feed and discharge buffer platform for a multi-purpose heat treatment furnace according to claim 3, characterized in that: An arc-shaped frame plate (476) is slidably connected inside the arc plate (471). The inner side of the top of the arc-shaped frame plate (476) contacts the bottom of the workpiece holder (5). A connecting block (477) is fixedly connected to the front side of the bottom inside the arc-shaped frame plate (476). A slot (478) is opened on the outer side of the connecting block (477). A locking post (479) is fixedly connected to the telescopic end of the electric push rod (475). The locking post (479) is locked inside the slot (478).

5. The feed and discharge buffer platform for a multi-purpose heat treatment furnace according to claim 1, characterized in that: The bottom of the translation plate (43) is provided with sliding grooves (6) on both sides, and the top of the support platform (2) is provided with guide rods (7) on both sides, and the guide rods (7) are slidably connected inside the sliding grooves (6).

6. The feed and discharge buffer platform for a multi-purpose heat treatment furnace according to claim 1, characterized in that: The four corners of the top of the workpiece holder (5) are all welded with hanging sleeves (8), which are semi-circular rings.

7. The feed and discharge buffer platform for a multi-purpose heat treatment furnace according to claim 1, characterized in that: The heat treatment furnace (1) is provided with an inlet and outlet (9) on the front side, and a closed door (10) is rotatably connected to the front side of the heat treatment furnace (1). The closed door (10) is located on the front side of the inlet and outlet (9).

8. The feed and discharge buffer platform for a multi-purpose heat treatment furnace according to claim 7, characterized in that: The inlet / outlet (9) is circular in shape, and the bottom side inside the inlet / outlet (9) is lower than the bottom of the arc-shaped frame plate (476).

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