Well type gas carburizing furnace muffle oil seal lifting mechanism

Abstract

The utility model relates to a muffle pot lifting related technical field especially, relates to a well type gas carburizing furnace muffle oil seal lifting mechanism, include: the connection outer ring piece is connected with the outer surface wall of muffle pot through the mounting block, the outer surface wall of connection outer ring piece is fixedly connected with two connecting blocks symmetrically, drive structure sets up one side at connection outer ring piece for the lift of muffle pot provides power, gravity balance structure sets up another side at connection outer ring piece, in the utility model, through setting gravity balance mechanism, the weight of counterweight block can realize accurate balance with the weight of muffle pot, in the lifting process of muffle pot, make drive mechanism not need to bear the gravity load of muffle pot, only need to overcome friction and inertial force etc.

Description

Technical Field

[0001] This utility model relates to the technical field of muffle tank lifting, and in particular to a muffle oil sealing lifting mechanism for a well-type gas carburizing furnace. Background Technology

[0002] Pit-type gas carburizing furnaces are key equipment for metal surface heat treatment and are widely used in industries such as machinery manufacturing and automotive parts. Their muffle oil sealing lifting mechanism is responsible for lifting the muffle tank, which plays a vital role in ensuring the stability, safety and product quality of the carburizing process.

[0003] In existing technologies, the muffle oil sealing lifting mechanism of the pit-type gas carburizing furnace mostly adopts the method of directly driving the muffle tank to lift and lower through the drive mechanism. The lifting and lowering action of the muffle tank is achieved through the coordinated work of components such as motor, reducer, gear, chain (or lead screw and other transmission components) to meet the operation requirements of workpiece entering and leaving the furnace.

[0004] However, during the muffle tank's ascent, the reliance on a single drive mechanism necessitates the drive motor to output extremely high torque to overcome the full weight of the muffle tank and its internal components. This high-power output directly leads to significant energy consumption. Operating under prolonged high loads overburdens the transmission components, accelerating wear and significantly shortening their lifespan. Frequent shutdowns for maintenance and component replacement are necessary, severely impacting production efficiency. Furthermore, the high torque output of the motor during ascent causes a sluggish start-up, disrupting the entire lifting process. Conversely, during descent, gravity... The sudden reduction in load forces the motor to brake and adjust frequently, causing violent fluctuations and instability in the lifting speed. In this unstable state, the accuracy of loading and unloading workpieces is difficult to guarantee. During loading and unloading, collisions are very likely to occur due to positioning deviations, resulting in workpiece damage. At the same time, the violent vibrations generated during lifting continuously impact the muffle tank and sealing device. Over time, the originally precisely fitted sealing structure gradually loosens and deforms, causing the precious carburizing gas in the furnace to leak continuously. Outside air takes the opportunity to backflow, completely destroying the carefully created carburizing atmosphere in the furnace, seriously interfering with the carburizing process effect, and making it difficult for the workpiece quality to meet the standards. Utility Model Content

[0005] The purpose of this invention is to provide a muffle oil sealing lifting mechanism for a well-type gas carburizing furnace to solve the problems mentioned in the background art.

[0006] The technical solution adopted in this utility model is:

[0007] A muffle oil-sealed lifting mechanism for a well-type gas carburizing furnace includes:

[0008] The outer ring block is connected to the outer wall of the muffle tank via a mounting block, and two connecting blocks are symmetrically fixed to the outer wall of the outer ring block;

[0009] A drive structure, located on one side of the connecting outer ring block, is used to provide power for the lifting and lowering of the muffle tank;

[0010] A gravity balancing structure is located on the other side of the connecting outer ring block to balance the gravity of the muffle tank and reduce the load on the drive structure.

[0011] Optionally, the gravity balance structure includes:

[0012] Support side plates are located on one side of the muffle tank and are fixed to the ground with bolts;

[0013] The top plate is slidably connected to one side of the supporting side plate;

[0014] Two connecting side plates are symmetrically connected to the lower end of the supporting side plate;

[0015] Place the base plate, which is connected to the lower end of the two connecting side plates;

[0016] A counterweight is placed on the upper end of the base plate.

[0017] A steel wire rope is attached to the upper surface of the connecting top plate, and one end of the steel wire rope away from the connecting top plate is connected to one of the connecting blocks.

[0018] Optionally, the gravity balance structure further includes:

[0019] The mounting base is bolted to the steel frame structure at the top of the furnace body;

[0020] A fixed pulley is connected to the lower end face of the fixed base, and the wire rope passes around the fixed pulley.

[0021] Optionally, a movable groove is provided on the side wall of the supporting side plate near the connecting top plate, and a movable wheel is embedded inside the movable groove. One end of the movable wheel is fixedly connected to the side wall of the connecting top plate.

[0022] Optionally, the connecting side plate includes:

[0023] A fixing plate, which is fixedly connected to the lower end face of the connecting top plate;

[0024] The elastic plate is connected to the groove reserved in the fixed plate.

[0025] Optionally, the fixing plate is provided with a locking assembly, the locking assembly including:

[0026] Multiple toothed blocks are equidistantly and evenly connected to one side of the outer wall of the elastic plate;

[0027] A side block is provided on one side of the toothed block. The side block is provided in a cavity reserved in the fixing plate. The cavity is provided on one side of the plate groove.

[0028] A polyurethane elastic block is fixedly connected to the side wall of the side block near the tooth block.

[0029] Optionally, the locking assembly further includes:

[0030] The T-shaped screw rod is threaded onto the fixed plate. The connecting end of the T-shaped screw rod passes through the fixed plate and extends into the cavity, where it is rotatably connected to the side block via a bearing.

[0031] Optionally, the driving structure includes:

[0032] A lead screw, threadedly connected to another of the connecting blocks;

[0033] A forward and reverse motor is connected to one end of the lead screw;

[0034] The mounting bracket is fixedly connected to the outside of the forward and reverse motors, and the mounting bracket is bolted to the steel frame structure on the top of the furnace body;

[0035] A fixing block is rotatably connected to the other end of the lead screw, and the fixing block is fixedly connected to the inner surface wall of the furnace body.

[0036] Optionally, two clamping components are symmetrically provided on the outer side of the counterweight, and the two clamping components are elastically connected to the placement base plate.

[0037] Compared with the prior art, the beneficial effects of this utility model are:

[0038] A liftable counterweight is connected to the outer ring block via a steel wire rope at a position opposite to the drive structure. When the drive structure is activated, causing the muffle tank to move upward, the counterweight connected by the steel wire rope moves downward along the support side plate under gravity. When the muffle tank descends, the drive structure controls the muffle tank to move downward, and the counterweight moves upward along the support side plate under the traction of the steel wire rope. In this invention, through the gravity balancing mechanism, the weight of the counterweight can be precisely balanced with the weight of the muffle tank. During the lifting and lowering of the muffle tank, the drive mechanism does not need to bear the gravity load of the muffle tank, but only needs to overcome relatively small forces such as friction and inertia. This not only significantly reduces energy consumption but also effectively reduces the impact of gravity load. The additional energy consumption also greatly reduces wear between mechanical parts and extends the service life of the equipment. In addition, when the muffle tank rises, the pulling force generated by the counterweight cancels out the weight of the muffle tank. The drive mechanism only needs to overcome the friction between the muffle tank and the sealing device and the guide mechanism, as well as the inertial force of the system, to achieve a smooth rise of the muffle tank. This avoids unstable rising or insufficient power caused by gravity. During the descent of the muffle tank, the weight of the counterweight also plays a key role, helping to counteract the weight of the muffle tank. This significantly reduces the load on the drive mechanism, enabling a slow and stable descent of the muffle tank and effectively preventing problems such as excessively fast descent or loss of control caused by gravity. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is one of the overall structural diagrams in this application;

[0041] Figure 2 This is the second schematic diagram of the overall structure in this application;

[0042] Figure 3 This is an enlarged schematic diagram of the counterweight component in this application.

[0043] Figure 4 This is a schematic diagram of the gravity equilibrium structure in this application;

[0044] Figure 5 This is a partial cross-sectional schematic diagram of the counterweight component in this application;

[0045] Figure 6 This is a schematic diagram of the locking component in this application;

[0046] Figure 7 This is a schematic diagram showing the connection between the counterweight and the base plate in this application.

[0047] Figure label:

[0048] 1. Connecting outer ring block; 2. Connecting block; 3. Lead screw; 4. Forward and reverse motor; 5. Mounting bracket; 6. Fixing block;

[0049] 7. Gravity balance structure; 71. Supporting side plate; 72. Connecting top plate; 73. Connecting side plate; 731. Fixing plate; 732. Elastic plate; 74. Placement base plate; 75. Counterweight; 76. Steel wire rope; 77. Fixed pulley; 78. Fixed seat;

[0050] 8. Casters; 9. Mobility groove;

[0051] 10. Locking assembly; 101. Toothed block; 102. Side block; 103. Polyurethane elastic block; 104. T-shaped screw rod;

[0052] 11. Clamping components. Detailed Implementation

[0053] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0055] Given that the current technology relies entirely on a single drive mechanism during the muffle tank's ascent, the drive motor must output extremely high driving torque to overcome the full weight of the muffle tank and its internal workpieces. This high power output directly leads to significant energy consumption. Operating under high load conditions for extended periods causes the transmission components to become overburdened, accelerating wear and significantly shortening their lifespan. This necessitates frequent shutdowns for maintenance and component replacement, severely impacting production efficiency.

[0056] like Figure 1 and Figure 2 As shown, this utility model embodiment provides a muffle oil sealing lifting mechanism for a well-type gas carburizing furnace, including a connecting outer ring block 1 and a driving structure.

[0057] The outer ring block 1 is connected to the outer wall of the muffle tank via a mounting block. Two connecting blocks 2 are symmetrically fixed to the outer wall of the outer ring block 1. The drive structure is located on one side of the outer ring block 1 and is used to provide power for the lifting and lowering of the muffle tank. The drive structure includes a lead screw 3, a forward and reverse motor 4, a mounting bracket 5, and a fixing block 6. The lead screw 3 is threaded through and connected to another connecting block 2. The forward and reverse motor 4 is connected to one end of the lead screw 3. The mounting bracket 5 is fixedly connected to the outside of the forward and reverse motor 4 and is bolted to the steel frame structure at the top of the furnace body. The fixing block 6 is rotatably connected to the other end of the lead screw 3 and is fixedly connected to the inner wall of the furnace body.

[0058] When in use, to raise the muffle tank, start the forward and reverse motor 4 (model: SIMOTICS S-1FL6). The forward and reverse motor 4 drives the lead screw 3 to rotate. The lead screw 3 is threadedly engaged with the connecting block 2, causing the connecting block 2 to move upward, thereby driving the muffle tank connected by the connecting outer ring block 1 to rise. When descending, the forward and reverse motor 4 reverses, and the muffle tank descends. Note: The lower part of the muffle tank is inserted into the sealing oil groove. The oil forms an oil seal between the muffle tank and the oil groove, preventing gas in the furnace from leaking from the gap between the muffle tank and the furnace shell. Its top flange seat is fixed in the flange sealing groove on the upper part of the furnace shell. There will also be sealing material, which cooperates with the top flange seat of the muffle tank to further enhance the sealing effect (not shown in the figure).

[0059] Furthermore, in order to effectively alleviate the excessive load on the drive structure caused by the weight of the muffle tank during the lifting process, the lifting mechanism also includes a gravity balance structure 7.

[0060] Specifically, such as Figures 1-5 As shown, the gravity balancing structure 7 is located on the other side of the connecting outer ring block 1 to balance the gravity of the muffle tank and reduce the load on the drive structure.

[0061] The gravity balance structure 7 includes a supporting side plate 71, a connecting top plate 72, two connecting side plates 73, a placement base plate 74, a counterweight 75, and a steel wire rope 76. The supporting side plate 71 is located on one side of the muffle tank and is fixed to the ground by bolts. The connecting top plate 72 is slidably connected to one side of the supporting side plate 71. The two connecting side plates 73 are symmetrically connected to the lower end of the supporting side plate 71. The placement base plate 74 is connected to the lower end of the two connecting side plates 73. The counterweight 75 is placed on the upper end of the placement base plate 74. The steel wire rope 76 is connected to the upper surface of the connecting top plate 72, and the end of the steel wire rope 76 away from the connecting top plate 72 is connected to one of the connecting blocks 2.

[0062] The gravity balance structure 7 also includes a fixed seat 78 and a fixed pulley 77. The fixed seat 78 is bolted to the steel frame structure on the top of the furnace body. The fixed pulley 77 is connected to the lower end face of the fixed seat 78. The wire rope 76 passes around the fixed pulley 77.

[0063] Furthermore, a movable groove 9 is provided on the side wall of the supporting side plate 71 near the connecting top plate 72, and a movable wheel 8 is embedded inside the movable groove 9. One end of the movable wheel 8 is fixedly connected to the side wall of the connecting top plate 72.

[0064] When the drive mechanism starts and moves the muffle tank upward, the counterweight 75, connected between the top plate 72 and the base plate 74 via the wire rope 76, moves downward along the support side plate 71 under the action of gravity. During the movement, the moving wheel 8 slides in the moving groove 9. When the muffle tank descends, the drive mechanism controls the muffle tank to move downward, while the counterweight 75 moves upward along the support side plate 71 under the traction of the wire rope 76. Through the gravity balance mechanism, the weight of the counterweight 76 can be precisely balanced with the weight of the muffle tank. During the lifting and lowering of the muffle tank, the drive mechanism does not need to bear the weight load of the muffle tank, but only needs to overcome relatively small forces such as friction and inertia. When the muffle tank rises, the tension of the counterweight 76 offsets its weight, ensuring a smooth start; when it descends, the gravity of the counterweight 76 assists in offsetting the load, achieving a uniform and slow descent, effectively avoiding speed loss or loss of control during lifting and lowering, reducing energy consumption, reducing mechanical wear, and extending the service life of the equipment.

[0065] Specifically, such as Figure 5 and Figure 6 As shown, the connecting side plate 73 includes a fixed plate 731 and an elastic plate 732. The fixed plate 731 is fixedly connected to the fixed plate 731 on the lower end face of the connecting top plate 72. The elastic plate 732 is connected to the plate groove reserved in the fixed plate 731. The fixed plate 731 is provided with a locking component 10.

[0066] The locking assembly 10 includes multiple toothed blocks 101, side blocks 102, and polyurethane elastic blocks 103. The multiple toothed blocks 101 are equidistantly and evenly connected to one side of the outer wall of the elastic plate 732. The side blocks 102 are located on one side of the toothed blocks 101 and are located in the cavity reserved in the fixing plate 731. The cavity is located on one side of the plate groove. The polyurethane elastic blocks 103 are fixedly connected to the side wall of the side blocks 102 near the toothed blocks 101.

[0067] The locking assembly 10 also includes a T-shaped screw rod 104, which is threaded onto the fixing plate 731. The connecting end of the T-shaped screw rod 104 passes through the fixing plate 731 and extends into the cavity, where it is rotatably connected to the side block 102 via a bearing.

[0068] In use, screwing the end of the T-shaped screwing rod 104 rotates the rod. As it rotates, the side block 102 gradually moves away from the elastic plate 732, causing the polyurethane elastic block 103 to move away from the toothed block 101, thus releasing the lock. Then, pull down the placement base plate 74 to increase the distance between it and the connecting top plate 72, allowing for the replacement of a suitable counterweight block 75 according to the weight of the muffle tank. This solves the gravity balance requirements under different working conditions, significantly enhancing the equipment's versatility and applicability. After replacement, the T-shaped screwing rod 104 is rotated in the opposite direction. The rotating rod 104 and the polyurethane elastic block 103 are close to the toothed block 101. With the excellent elasticity and wear resistance of the polyurethane material itself, its surface will adaptively recess according to the tooth shape of the toothed block 101, quickly forming a precise matching tooth groove to achieve a tight engagement. This not only ensures the stability of the connection and effectively prevents the counterweight from loosening or shifting during equipment operation, thus ensuring the stable operation of the gravity balance mechanism, but also maintains good performance after repeated locking and unlocking operations, reducing component wear and extending service life.

[0069] Further, see Figure 7 As shown, two clamping components 11 are symmetrically arranged on the outer side of the counterweight 75. The two clamping components 11 are elastically connected to the placement base plate 74. The clamping component 11 consists of a side clamping plate and an elastic slider. The elastic slider is connected to the lower end face of the side clamping plate and is located in a groove reserved on the upper end face of the placement base plate 74.

[0070] Specifically, the clamping component 11 provides a stable clamping and flexible buffering of the counterweight 75, effectively limiting the lateral displacement of the counterweight and ensuring that it maintains a vertical running trajectory during the lifting process.

[0071] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A muffle oil-sealed lifting mechanism for a well-type gas carburizing furnace, characterized in that, include: The outer ring block is connected to the outer wall of the muffle tank via a mounting block, and two connecting blocks are symmetrically fixed to the outer wall of the outer ring block; A drive structure, located on one side of the connecting outer ring block, is used to provide power for the lifting and lowering of the muffle tank; A gravity balancing structure is located on the other side of the connecting outer ring block to balance the gravity of the muffle tank and reduce the load on the drive structure.

2. The muffle oil sealing lifting mechanism for a well-type gas carburizing furnace according to claim 1, characterized in that, The gravity balance structure includes: Support side plates are located on one side of the muffle tank and are fixed to the ground with bolts; The top plate is slidably connected to one side of the supporting side plate; Two connecting side plates are symmetrically connected to the lower end of the supporting side plate; Place the base plate, which is connected to the lower end of the two connecting side plates; A counterweight is placed on the upper end of the base plate. A steel wire rope is attached to the upper surface of the connecting top plate, and one end of the steel wire rope away from the connecting top plate is connected to one of the connecting blocks.

3. The muffle oil sealing lifting mechanism for a well-type gas carburizing furnace according to claim 2, characterized in that, The gravity balance structure also includes: The mounting base is bolted to the steel frame structure at the top of the furnace body; A fixed pulley is connected to the lower end face of the fixed base, and the wire rope passes around the fixed pulley.

4. The muffle oil sealing lifting mechanism for a well-type gas carburizing furnace according to claim 3, characterized in that, A movable groove is provided on the side wall of the supporting side plate near the connecting top plate. A movable wheel is embedded inside the movable groove, and one end of the movable wheel is fixedly connected to the side wall of the connecting top plate.

5. The muffle oil sealing lifting mechanism for a well-type gas carburizing furnace according to claim 4, characterized in that, The connecting side plate includes: A fixing plate, which is fixedly connected to the lower end face of the connecting top plate; The elastic plate is connected to the groove reserved in the fixed plate.

6. The muffle oil sealing lifting mechanism for a well-type gas carburizing furnace according to claim 5, characterized in that, The fixing plate is provided with a locking assembly, which includes: Multiple toothed blocks are equidistantly and evenly connected to one side of the outer wall of the elastic plate; A side block is provided on one side of the toothed block. The side block is provided in a cavity reserved in the fixing plate. The cavity is provided on one side of the plate groove. A polyurethane elastic block is fixedly connected to the side wall of the side block near the tooth block.

7. The muffle oil sealing lifting mechanism for a well-type gas carburizing furnace according to claim 6, characterized in that, The locking assembly further includes: The T-shaped screw rod is threaded onto the fixed plate. The connecting end of the T-shaped screw rod passes through the fixed plate and extends into the cavity, where it is rotatably connected to the side block via a bearing.

8. The muffle oil sealing lifting mechanism for a well-type gas carburizing furnace according to claim 1, characterized in that, The driving structure includes: A lead screw, threadedly connected to another of the connecting blocks; A forward and reverse motor is connected to one end of the lead screw; The mounting bracket is fixedly connected to the outside of the forward and reverse motors, and the mounting bracket is bolted to the steel frame structure on the top of the furnace body; A fixing block is rotatably connected to the other end of the lead screw, and the fixing block is fixedly connected to the inner surface wall of the furnace body.

9. The muffle oil sealing lifting mechanism for a well-type gas carburizing furnace according to claim 2, characterized in that, Two clamping components are symmetrically arranged on the outer side of the counterweight, and the two clamping components are elastically connected to the placement base plate.

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