A three-blade symmetrical stirring device for a heat treatment quenching pool

Abstract

The application belongs to the technical field of heat treatment production, and particularly relates to a three-blade symmetrical stirring device for a quenching pool of heat treatment, which comprises a supporting frame, a stirring assembly and a rotating assembly, the supporting frame is fixed to the top of the quenching pool, the stirring assembly is arranged at the bottom of the quenching pool and used for stirring the quenching medium, and the rotating assembly is arranged above the supporting frame and used for driving the stirring assembly to rotate, the rotating assembly comprises a supporting seat fixed above the supporting frame, a driving shaft extending to the bottom of the quenching pool is rotatably connected to the supporting seat, a rotating seat is arranged at the bottom of the quenching pool, the bottom end of the driving shaft is rotatably matched in the rotating seat, the rotating assembly further comprises a driving motor fixed to one side of the supporting seat, and the driving motor and the driving shaft are connected through a belt and pulley speed reduction transmission. The application enhances the flow diffusion capacity of the quenching medium, makes the temperature of the quenching medium balance faster, and solves the problem that the cooling liquid flow is slow or even stagnant in the area far away from the stirrer.

Description

Technical Field

[0001] This invention belongs to the field of heat treatment production technology, and in particular relates to a three-bladed symmetrical stirring device for heat treatment quenching tank. Background Technology

[0002] Quenching is a metal heat treatment process that involves heating a metal workpiece to a suitable temperature, holding it at that temperature for a certain time, and then rapidly immersing it in a quenching medium for rapid cooling. The stirring device in the quenching tank is an indispensable key piece of equipment in the metal heat treatment quenching process. Its core function is to ensure uniform temperature and stable flow rate of the quenching medium by forcibly stirring it, thereby achieving rapid and uniform cooling of the workpiece. Ultimately, this ensures that the mechanical properties of the quenched workpiece meet the standards and reduces defects such as deformation and cracking.

[0003] Quenching stirring includes two methods: strong stirring and weak stirring. Strong stirring is usually used when quenching large, thick-walled workpieces. Strong stirring can quickly remove heat by continuously scouring the surface of the workpiece, reducing the difference in cooling rate between the surface and the interior. For precision thin-walled parts, weak stirring is usually used. Weak stirring can minimize the difference in cooling rate between different parts of the workpiece through a gentle flow field.

[0004] Current quenching stirring devices still have the following shortcomings:

[0005] 1. Currently, the control method for strong and weak stirring relies solely on controlling the speed of the motor. However, the effective range of the stirrer is positively correlated with the speed. When the speed is too low, the thrust of the blades on the coolant is greatly reduced, which may cause the coolant to flow slowly or even stop in areas far from the stirrer. This results in a large temperature difference of the cooling medium in the quenching tank, which in turn leads to a greater difference in the cooling rate of different parts of the workpiece, causing deformation or uneven hardness.

[0006] 2. Simply relying on controlling the motor speed to adjust the stirring intensity has a limited range of adjustment. When the required stirring intensity is lower than the stirring intensity corresponding to the lowest operating speed of the motor, the existing device is difficult to meet the requirements, and thus the existing stirring device is difficult to adapt to the needs of complex processes.

[0007] 3. Quenching media usually contain metallic impurities, which are typically hard and will directly wear down the workpiece surface under stirring and scouring, affecting the quality of the workpiece. Summary of the Invention

[0008] The purpose of this invention is to address the problems mentioned in the background section by providing a three-bladed symmetrical stirring device for heat treatment quenching tanks.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: a three-blade symmetrical stirring device for a heat treatment quenching tank, comprising:

[0010] Support frame, fixed to the top of the quenching tank;

[0011] A stirring assembly, located at the bottom of the quenching tank, is used to stir the quenching medium.

[0012] A rotating component, located above the support frame, is used to drive the stirring component to rotate.

[0013] Furthermore, each of the rotating components includes a support base fixed above the support frame, on which a drive shaft extending to the bottom of the quenching tank is rotatably connected. A rotating seat is provided at the bottom of the quenching tank, and the bottom end of the drive shaft is rotatably fitted into the rotating seat.

[0014] Furthermore, the rotating assembly also includes a drive motor fixed to one side of the support base, and the drive motor and the drive shaft are driven by a pulley and a belt for speed reduction.

[0015] Furthermore, the stirring assembly includes a mounting ring fixed to the drive shaft. The mounting ring is hollow inside and has a removable top cover fixed to it by bolts. Three stirring blades are provided on the side wall of the mounting ring, and the included angle between two adjacent stirring blades is 120°.

[0016] Furthermore, the three sides of the stirring blade are all wedge-shaped, used to guide the quenching medium.

[0017] Furthermore, a filter plate is provided on the outer side of the stirring blade, and a baffle is provided on the top of the end of the filter plate away from the drive shaft.

[0018] Furthermore, the stirring blade is rotatably connected to the mounting ring via a rotating shaft, and the mounting ring is provided with an angle adjustment power assembly for adjusting the angle of the stirring blade.

[0019] Furthermore, the angle adjustment power assembly includes a slide rail fixed inside the mounting ring, a counterweight block slidably fitted on the slide rail, a drive rod for driving the rotating shaft to rotate on the counterweight block, and a spiral groove slidably fitted on the rotating shaft to the drive rod. When the mounting ring rotates, the counterweight block moves along the slide rail under the action of centrifugal force, thereby realizing the rotation of the rotating shaft under the cooperation of the spiral groove and the drive rod.

[0020] Furthermore, the angle adjustment power assembly also includes a first fixing rod disposed within the mounting ring, and second fixing rods disposed on both sides of the counterweight block, with a tension spring disposed between the first fixing rod and the second fixing rod.

[0021] Compared with existing technologies, the advantages of this invention are:

[0022] 1. The surface of the stirring blade of this invention is three wedge-shaped surfaces. When the stirring blade pushes the quenching medium to flow, the quenching medium will diffuse in three directions along the wedge-shaped surfaces, which enhances the flow and diffusion ability of the quenching medium. When the stirring is strong, the enhanced flow and diffusion ability of the quenching medium can make the temperature of the quenching medium in the quenching pool reach equilibrium more quickly, which is beneficial to improving the quenching quality. When the stirring is weak, the improved flow and diffusion ability of the quenching medium effectively solves the problem of slow or even stagnant coolant flow in areas far from the stirrer.

[0023] 2. This invention adjusts the angle of the stirring blades by moving the counterweight to different positions, while the position of the seed block is determined by the rotational speed of the drive motor, based on the centrifugal force calculation formula. It is known that when the mass of an object is fixed, the greater its angular velocity, the greater the centrifugal force. During strong stirring, the drive shaft rotates at a high speed, the counterweight experiences a large centrifugal force, the counterweight is far from the drive shaft, the angle between the stirring blades and the horizontal plane is large, and the stirring blades have a strong propulsion ability. Conversely, during weak stirring, the angle between the stirring blades and the horizontal plane is small, and the stirring blades have a weak propulsion ability. The angle of the stirring blades is automatically adjusted by the motor speed, reducing manual intervention.

[0024] 3. The stirring intensity of the present invention is adjusted by "dual variables" of motor speed and stirring blade angle, which effectively expands the adjustable range of stirring intensity and can thus meet the needs of more complex processes.

[0025] 4. By setting up a filter plate and a baffle, the present invention can collect and centrally process impurities in the quenching medium, effectively reducing the possibility of workpieces being impacted by impurities during the quenching process, which is beneficial to improving workpiece quality. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of a three-blade symmetrical stirring device for a heat treatment quenching tank provided by the present invention.

[0027] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0028] Figure 3 yes Figure 1 Enlarged view at point B in the middle;

[0029] Figure 4 This is a schematic diagram of the stirring assembly structure of a three-blade symmetrical stirring device for a heat treatment quenching tank provided by the present invention.

[0030] Figure 5 This is a schematic diagram of the angle adjustment power component structure of a three-blade symmetrical stirring device for a heat treatment quenching tank provided by the present invention.

[0031] Figure 6This is a schematic diagram of the stirring blade structure of a three-blade symmetrical stirring device for a heat treatment quenching tank provided by the present invention.

[0032] In the figure, 1 is the support frame, 2 is the support base, 21 is the drive shaft, 22 is the rotating seat, 23 is the drive motor, 31 is the mounting ring, 311 is the top cover, 32 is the stirring blade, 321 is the rotating shaft, 33 is the filter plate, 331 is the baffle, 34 is the slide rail, 35 is the counterweight, 351 is the drive rod, 322 is the spiral groove, 36 is the first fixed rod, 352 is the second fixed rod, 37 is the tension spring, 4 is the quenching tank, 231 is the first pulley, 211 is the second pulley, and 232 is the belt. Detailed Implementation

[0033] The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0034] Example

[0035] like Figures 1-6 As shown, a three-blade symmetrical stirring device for a heat treatment quenching tank includes a support frame 1, a stirring assembly and a rotating assembly. The support frame 1 is fixed to the top of the quenching tank 4 by bolts. The stirring assembly is located at the bottom of the quenching tank 4 and is used to stir the quenching medium. The rotating assembly is located above the support frame 1 and is used to drive the stirring assembly to rotate.

[0036] The rotating assembly includes a support base 2 fixed above the support frame 1. A drive shaft 21 extending to the bottom of the quenching tank 4 is rotatably connected to the support base 2. Specifically, flanges are fixed to the top and bottom of the support base 2 by bolts. The drive shaft 21 is connected to the two flanges by bearings. A rotating seat 22 is provided at the bottom of the quenching tank 4. Specifically, the rotating seat 22 is detachably fixed to the bottom of the quenching tank 4 by bolts. The bottom end of the drive shaft 21 is rotatably fitted into the rotating seat 22.

[0037] The rotating assembly also includes a drive motor 23 fixed to one side of the support base 2. The drive motor 23 and the drive shaft 21 are driven by a speed reduction transmission. Specifically, a first pulley 231 is fixed on the output shaft of the drive motor 23, and a second pulley 211 is fixed on the drive shaft 21. The first pulley 231 and the second pulley 211 are connected by a belt drive 232. When the drive motor 23 rotates, the drive shaft 21 is driven to rotate by the combined action of the first pulley 231, the second pulley 211 and the belt 232.

[0038] The stirring assembly includes a mounting ring 31 fixed to the drive shaft 21. The mounting ring 31 is hollow inside. Specifically, there are mounting holes on the side wall of the mounting ring 31, and screws are installed in the mounting holes. The drive shaft 21 has threaded holes for mounting the mounting ring 31. The mounting ring 31 is fixed to the drive shaft 21 by the screws and threaded holes. The mounting ring 31 is fixed with a removable top cover 311 by bolts. There are three stirring blades 32 on the side wall of the mounting ring 31. The design of the removable top cover 311 facilitates the installation of the stirring blades 32 and facilitates the maintenance of the internal parts of the mounting ring 31. The included angle between two adjacent stirring blades 32 is 120°. The three sides of the stirring blades 32 are wedge-shaped surfaces for guiding the quenching medium.

[0039] Specifically, when the stirring blade 32 rotates around the drive shaft 21, the quenching medium flows in three directions along the three wedge-shaped surfaces of the stirring blade 32, which enhances the flow and diffusion ability of the quenching medium and allows the quenching medium near the stirring blade 32 to diffuse outward better, thereby enabling the temperature of the quenching medium in the quenching pool 4 to be balanced more quickly.

[0040] A filter plate 33 is provided on the outer side of the stirring blade 32. A baffle 331 is provided on the top of the end of the filter plate 33 away from the drive shaft 21. When the stirring blade 32 rotates around the drive shaft 21, when metal or other impurities in the quenching medium come into contact with the stirring blade 32, they will slide along the wedge-shaped surface to the vicinity of the filter plate 33. Under the action of centrifugal force, these impurities will eventually move to the end of the filter plate 33 away from the drive shaft 21. The baffle 331 can prevent impurities from falling back into the quenching medium when they accumulate too much. Through the filter plate 33 and the baffle 331, the metal or other impurities in the quenching pool 4 are collected, avoiding the wear of the workpiece surface by these impurities under stirring and scouring, and improving the quality of the workpiece.

[0041] The stirring blade 32 is rotatably connected to the mounting ring 31 via a rotating shaft 321 and a bearing. The mounting ring 31 contains an angle-adjusting power assembly for adjusting the angle of the stirring blade 32. This assembly includes a slide rail 34 fixed within the mounting ring 31, on which a counterweight 35 is slidably fitted. The counterweight 35 has a drive rod 351 for driving the rotating shaft 321. The rotating shaft 321 has a spiral groove 322 that slidably engages with the drive rod 351. When the mounting ring 31 rotates, the counterweight 35 moves along the slide rail 34 under centrifugal force, thus adjusting the angle between the spiral groove 322 and the drive rod 351. The rotation of the shaft 321 is achieved by closing the drive rod 351. When the drive rod 351 is at one end of the spiral groove 322 close to the drive shaft 21, the angle between the bottom surface of the stirring blade 32 and the horizontal plane is the smallest, and the pushing ability of the stirring blade 32 is the weakest. When the drive rod 351 is at the other end of the spiral groove 322, the angle between the bottom surface of the stirring blade 32 and the horizontal plane is the largest, and the pushing ability of the stirring blade 32 is the strongest. The angle adjustment power assembly also includes a first fixing rod 36 located in the mounting ring 31, and second fixing rods 352 located on both sides of the counterweight block 35. A tension spring 37 is located between the first fixing rod 36 and the second fixing rod 352.

[0042] In operation, the drive shaft 21 rotates, causing the mounting ring 31 to rotate. Under the action of centrifugal force, the counterweight 35 moves along the slide rail 34 away from the drive shaft 21 and stretches the tension spring 37. This, in turn, drives the rotating shaft 321 to rotate under the action of the drive rod 351 and the spiral groove 322, thus adjusting the angle of the stirring blade 32. When the centrifugal force on the counterweight 35 is balanced with the tension of the tension spring 37, or when the drive rod 351 moves to the end of the spiral groove 322, the counterweight 35 stops moving, and the deflection angle of the stirring blade 32 is fixed. The magnitude of the centrifugal force on the counterweight 35 is determined by the rotational speed of the drive motor 23, according to the centrifugal force calculation formula. It can be seen that when the mass of an object is fixed, the greater its angular velocity, the greater the centrifugal force. During strong stirring, the drive shaft 23 rotates at a high speed, the counterweight 35 experiences a large centrifugal force, the counterweight 35 is far from the drive shaft 23, the angle between the stirring blade 32 and the horizontal plane is large, and the stirring blade 32 has a strong pushing ability. Conversely, during weak stirring, the angle between the stirring blade 32 and the horizontal plane is small, and the stirring blade 32 has a weak pushing ability. The angle of the stirring blade 32 is automatically adjusted by the motor speed.

[0043] The working principle of this invention is as follows:

[0044] During operation, the drive motor 23 is turned on, and the output shaft of the drive motor 23 begins to rotate. Under the transmission action of the pulley and belt, it drives the drive shaft 21 to rotate. The drive shaft 21 drives the mounting ring 31 and the stirring blade 32 to rotate around the drive shaft 21 to stir the quenching medium in the quenching tank 4. Since the three surfaces of the stirring blade 32 are wedge-shaped, the quenching medium and its impurities will flow in three directions along the three wedge-shaped surfaces after contacting the stirring blade 32. This enhances the flow and diffusion ability of the quenching medium, allowing the quenching medium near the stirring blade 32 to diffuse better to the outside. This allows the temperature of the quenching medium in the quenching tank 4 to reach equilibrium more quickly, which is beneficial to improving the quenching quality. In addition, the enhanced flow and diffusion ability of the quenching medium effectively solves the problem of slow or even stagnant coolant flow in areas far from the stirrer (especially during weak stirring).

[0045] When the stirring blade 32 is working, the quenching medium passes smoothly through the filter plate 33, while metal or other impurities are intercepted by the filter plate 33. Under the action of centrifugal force, the intercepted impurities eventually move to the end of the filter plate 33 away from the drive shaft 21. The baffle 331 can prevent impurities from falling back into the quenching medium when they accumulate too much. The impurities in the quenching medium are collected through the filter plate 33 and the baffle 331, which effectively reduces the possibility of impurities hitting the workpiece and helps to improve the quality of the workpiece.

[0046] When the mounting ring 31 rotates, the counterweight 35 moves along the slide rail 34 away from the drive shaft 21 under the action of centrifugal force, stretching the tension spring 37. This, in turn, drives the rotating shaft 321 to rotate under the action of the drive rod 351 and the spiral groove 322, thus adjusting the angle of the stirring blade 32. When the centrifugal force on the counterweight 35 is balanced with the tension of the tension spring 37, or when the drive rod 351 moves to the end of the spiral groove 322, the counterweight 35 stops moving. The magnitude of the centrifugal force on the counterweight 35 is determined by the rotational speed of the drive motor 23, according to the centrifugal force calculation formula. It can be seen that when the mass of an object is fixed, the greater its angular velocity, the greater the centrifugal force. During strong stirring, the drive shaft 23 rotates at a high speed, the counterweight 35 experiences a large centrifugal force, the counterweight 35 is far from the drive shaft 23, the angle between the stirring blade 32 and the horizontal plane is large, and the stirring blade 32 has a strong pushing ability. Conversely, during weak stirring, the angle between the stirring blade 32 and the horizontal plane is small, and the stirring blade 32 has a weak pushing ability. The angle of the stirring blade 32 is automatically adjusted by the motor speed, reducing manual intervention.

[0047] Furthermore, the present invention adjusts the stirring intensity by using "dual variables" of the drive motor speed and the stirring blade 32 angle. As the drive motor speed decreases, the angle between the stirring blade 32 and the horizontal plane is deformed, further reducing the stirring intensity and effectively expanding the adjustable range of the stirring intensity, thereby adapting to the needs of more complex processes.

[0048] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A three-blade symmetrical stirring device for a heat treatment quenching tank, characterized in that, include: Support frame (1) is fixed to the top of the quenching tank; A stirring assembly, located at the bottom of the quenching tank, is used to stir the quenching medium. A rotating component is disposed above the support frame (1) and is used to drive the stirring component to rotate; The rotating assembly includes a support base (2) fixed above the support frame (1), and a drive shaft (21) extending to the bottom of the quenching pool is rotatably connected to the support base (2). A rotating seat (22) is provided at the bottom of the quenching pool, and the bottom end of the drive shaft (21) is rotatably fitted into the rotating seat (22). The stirring assembly includes a mounting ring (31) fixed on the drive shaft (21). The mounting ring (31) is hollow inside. The mounting ring (31) is fixed with a removable top cover (311) by bolts. Three stirring blades (32) are provided on the side wall of the mounting ring (31). The included angle between two adjacent stirring blades (32) is 120°. Each of the stirring blades (32) has three wedge-shaped sides for guiding the quenching medium. The stirring blade (32) is provided with a filter plate (33) on the outside, and a baffle (331) is provided at the top of the end of the filter plate (33) away from the drive shaft (21). The stirring blade (32) is rotatably connected to the mounting ring (31) via a rotating shaft (321), and the mounting ring (31) is provided with an angle adjustment power assembly for adjusting the angle of the stirring blade (32); The angle adjustment power assembly includes a slide rail (34) fixed inside the mounting ring (31), a counterweight (35) slidably fitted on the slide rail (34), a drive rod (351) for driving the rotating shaft (321) to rotate on the counterweight (35), and a spiral groove (322) slidably fitted on the rotating shaft (321) to the drive rod (351). When the mounting ring (31) rotates, the counterweight (35) moves along the slide rail (34) under the action of centrifugal force, thereby realizing the rotation of the rotating shaft (321) under the cooperation of the spiral groove (322) and the drive rod (351). The angle adjustment power assembly also includes a first fixing rod (36) disposed in the mounting ring (31), and a second fixing rod (352) disposed on both sides of the counterweight (35). A tension spring (37) is disposed between the first fixing rod (36) and the second fixing rod (352).

2. The three-blade symmetrical stirring device for a heat treatment quenching tank according to claim 1, characterized in that, The rotating assembly also includes a drive motor (23) fixed to one side of the support base (2), and the drive motor (23) and the drive shaft (21) are driven by a pulley and belt for speed reduction.

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