Continuous isothermal quenching heat treatment device for grinding balls

Abstract

The utility model discloses a continuous isothermal quenching heat treatment device for grinding balls, which comprises a rack assembly, a quenching mechanism arranged at the middle lower part of the rack assembly, and a lifting mechanism arranged at the top of the rack assembly and connected with the quenching mechanism downwards. The quenching mechanism comprises a quenching liquid pool, quenching fan covers, a quenching fan, a quenching stock bin, a rotating frame body and a rotating motor, the quenching liquid pool is arranged at the bottom of the rack assembly, the quenching fan covers are oppositely arranged in the middle of the rack assembly and located on the side walls of the rack assembly respectively, the quenching stock bin is arranged on the rotating frame body, and the quenching stock bin and the rotating frame body are in movable fit; the rotating frame body is in transmission connection with the lifting mechanism, the lifting mechanism drives the rotating frame body to do lifting motion, a rotating motor is arranged at the center of the top of the rotating frame body, and the rotating motor is downwards connected with the quenching stock bin and drives the quenching stock bin to rotate. According to the utility model, double-medium quenching is adopted, so that the structural stress of the grinding ball is reduced and the service performance of the grinding ball is effectively improved on the premise of ensuring the hardening of the grinding ball.

Description

Technical Field

[0001] The utility model belongs to the technical field of grinding ball production and processing, in particular to a grinding ball continuous isothermal quenching heat treatment device. Background Art

[0002] Grinding balls are basically formed by casting, and then the metal structure inside the grinding balls is controlled by subsequent heat treatment processes to achieve the effect of improving the performance of the grinding balls. Existing quenching equipment usually places the grinding balls directly in a quenching box or quenching tank for quenching heat treatment. The grinding balls are in a static state and are prone to insufficient quenching, resulting in uncontrolled quenching quality, poor quality consistency, and batch quality problems, which affect the production effect of the grinding balls. Therefore, a grinding ball quenching equipment is proposed to solve the above problems. Utility Model Content

[0003] The utility model provides a grinding ball continuous isothermal quenching heat treatment device.

[0004] The utility model is realized by the following technical scheme: it comprises a frame assembly, a quenching mechanism is arranged in the middle and lower part of the frame assembly, a lifting mechanism is arranged on the top of the frame assembly, the lifting mechanism is downwardly connected to the quenching mechanism, the quenching mechanism comprises a quenching liquid pool, a quenching air hood, a quenching fan, a quenching silo, a rotating frame, and a rotating motor, the quenching liquid pool is arranged at the bottom of the frame assembly, the quenching air hood is relatively arranged in the middle part of the frame assembly, and is respectively located on the side walls of the frame assembly, the quenching silo is arranged on the rotating frame, the two are dynamically matched, the rotating frame is transmission-connected to the lifting mechanism, the lifting mechanism drives the rotating frame to perform lifting movement, a rotating motor is arranged at the top center of the rotating frame, the rotating motor is downwardly connected to the quenching silo, and drives the quenching silo to rotate.

[0005] Furthermore, the rotating frame is configured as a cylindrical frame structure, and a supporting guide rail with a protruding annular structure is arranged on the inner side of the lower part of the rotating frame. A groove is arranged on the upper surface of the supporting guide rail, and balls are arranged in the grooves. A groove matching the ball is arranged at the bottom of the quenching silo, and the quenching silo is pressed onto the ball through the groove.

[0006] Furthermore, the quenching silo is configured as a cylindrical structure that is compatible with the rotating frame, the bottom and side walls of the quenching silo are configured as a mesh structure, and the mesh aperture is smaller than the diameter of the grinding balls, and a cross-shaped or Y-shaped driving frame is provided on the top of the quenching silo, and the center of the driving frame is connected to the rotating motor.

[0007] Furthermore, the lifting mechanism includes a lifting screw, a screw motor, and a support. The lifting screws are symmetrically arranged on the frame assembly. The bottom of each lifting screw is fixedly arranged at the bottom of the quenching liquid pool through a support, and a gap is set with the inner wall of the quenching liquid pool. The upper part is fixedly arranged at the top of the frame assembly through a support. At least two screw nuts are arranged on each lifting screw, and the screw nuts are connected to the rotating frame to drive the rotating frame to lift and lower. The screw motor is arranged on the frame assembly at the top of each lifting screw and is connected to the lifting screw.

[0008] The beneficial effects of the utility model are: 1. It avoids the situation that the grinding balls are directly placed into the quenching box or quenching tank for quenching, which is easy to cause cracks in the grinding balls, and improves the quenching quality of the grinding balls;

[0009] 2. It can make the grinding balls roll continuously during quenching, thereby improving the quenching uniformity of the grinding balls. It solves the problem of the existing quenching device that the internal quenching liquid is in a static state, and the temperature is different at different places under the influence of the grinding ball quenching, which affects the quenching effect of the grinding balls. It makes the quenching quality of the grinding balls more consistent and effectively avoids the occurrence of batch quality problems.

[0010] 3. The use of double-medium quenching greatly improves the cooling speed and cooling uniformity of the grinding balls in the medium. Under the premise of ensuring the hardening of the grinding balls, the temperature difference between the inside and outside of the grinding balls is small, which reduces the structural stress, avoids the deformation and cracking of the grinding balls, and effectively improves the performance of the grinding balls;

[0011] 4. The transition process between different media is simple and smooth, and no manual operation is required. The equipment completes it automatically, which is conducive to improving operational safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 It is a schematic diagram of the position structure of the frame assembly, lifting mechanism, and quenching air hood;

[0014] Figure 3 It is a schematic diagram of the top view of the frame assembly, the quenching liquid pool, the quenching material bin, the rotating frame, and the lifting mechanism;

[0015] Figure 4 It is a schematic diagram of the top view of the frame assembly and the quenching air hood;

[0016] Figure 5 It is a structural schematic diagram of the quenching bin and the rotating frame;

[0017] Figure 6 It is a schematic diagram of the top view of the rotating frame and the supporting guide rail;

[0018] Figure 7It is a structural schematic diagram of a rotating frame;

[0019] Figure 8 It is a structural diagram of the quenching silo;

[0020] Fig. 9 It is a structural schematic diagram of the working surface of the quenching air hood;

[0021] Numbers in the figure: 1~frame assembly, 2~quenching liquid pool, 3~quenching air hood, 4~quenching air hole, 5~quenching fan, 6~quenching silo, 7~rotating frame, 8~support guide rail, 9~groove, 10~ball, 11~bracket, 12~rotating motor, 13~lifting screw, 14~screw motor, 15~support, 16~screw nut, 17~conical barrel, 18~liquid inlet pipe, 19~liquid discharge pipe, 20~discharge port, 21~baffle, 22~limit ear plate, 23~limit rod. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the utility model, its specific implementation method is described in detail below with reference to the accompanying drawings.

[0023] like Figures 1 to 9 The grinding ball continuous isothermal quenching heat treatment device shown includes a frame assembly 1, a quenching mechanism is arranged in the lower part of the frame assembly 1, and a lifting mechanism is arranged on the top of the frame assembly 1, the lifting mechanism is connected to the quenching mechanism downward, the quenching mechanism includes a quenching liquid pool 2, a quenching air hood 3, a quenching fan 5, a quenching bin 6, a rotating frame 7, and a rotating motor 12. The quenching liquid pool 2 is arranged at the bottom of the frame assembly 1, the quenching air hood 3 is relatively arranged in the middle of the frame assembly 1, and is respectively located on the side walls of the frame assembly 1. The quenching bin 6 is arranged on the rotating frame 7, and the two are dynamically matched. The rotating frame 7 is transmission-connected to the lifting mechanism, and the lifting mechanism drives the rotating frame 7 to perform lifting and lowering movements. A rotating motor 12 is arranged at the top center of the rotating frame 7, and the rotating motor 12 is connected to the quenching bin 6 downward to drive the quenching bin 6 to rotate.

[0024] The rotating frame body 7 is arranged in a cylindrical frame structure, and a supporting guide rail 8 with a protruding annular structure is arranged on the inner side of the lower part of the rotating frame body 7. A groove 9 is arranged on the upper surface of the supporting guide rail 8, and a ball 10 is arranged in each groove 9. A groove 9 matching the ball 10 is arranged at the bottom of the quenching silo 6. The quenching silo 6 is pressed onto the ball 10 through the groove 9, so that the ball 10 is restricted in the groove 9, and the quenching silo 6 is rotated on the supporting guide rail 8 through the ball 10.

[0025] The quenching silo 6 is provided in a cylindrical structure matched with the rotating frame 7, the bottom of the quenching silo 6 is closed, and the top is an open structure. Through holes are provided on the bottom and side walls of the quenching silo 6, and the aperture of the through holes is smaller than the diameter of the grinding balls.

[0026] The quenching silo 6 is configured as a cylindrical structure that matches the rotating frame 7. The bottom and side walls of the quenching silo 6 are configured as a mesh structure, and the mesh aperture is smaller than the diameter of the grinding ball. A cross-shaped or Y-shaped driving frame is provided on the top of the quenching silo 6, and the center of the driving frame is connected to the rotating motor 12.

[0027] The bottom and top of the rotating frame 7 are respectively provided with a cross-shaped or a cross-shaped bracket 11 , and the rotating motor 12 is arranged at the center of the bracket 11 at the top of the rotating frame 7 .

[0028] Each of the quenching hoods 3 is configured as a square box with a certain curvature structure, and its height is not less than the height of the quenching silo 6. Protruding quenching air holes 4 are provided on the inner side of the quenching hood 3, and a pipeline is provided on the back to connect the quenching fan 5.

[0029] The quenching fan 5 is a fan with a heating function, which can meet the requirements of blowing both low-temperature air and hot air.

[0030] The lifting mechanism includes a lifting screw 13, a screw motor 14, and a support 15. The lifting screw 13 is symmetrically arranged on the frame assembly 1. The bottom of each lifting screw 13 is fixedly arranged at the bottom of the quenching liquid pool 2 through the support 15, and a gap is set with the inner wall of the quenching liquid pool 2. The upper part is fixedly arranged at the top of the frame assembly 1 through the support 15. At least two screw nuts 16 are arranged on each lifting screw 13, and the screw nuts 16 are connected to the rotating frame 7 to drive the rotating frame 7 to lift and lower. The screw motor 14 is arranged on the frame assembly 1 at the top of each lifting screw 13 and is connected to the lifting screw 13.

[0031] An upwardly protruding conical barrel 17 is provided at the center of the inner bottom of the quenching silo 6. The conical barrel 17 extends to the upper part of the quenching silo 6. Through holes are provided on the conical barrel 17. When the quenching silo 6 rotates, a certain space is provided in the center of the quenching silo 6 to ensure the entry of the quenching medium and increase the uniformity of the quenching medium contacting the grinding balls.

[0032] The quenching liquid pool 2 is provided with an inlet pipe 18 at the top and a drain pipe 19 at the bottom. Valves are provided on the inlet pipe 18 and the drain pipe 19. The inlet pipe 18 delivers quenching liquid to the quenching liquid pool 2, and the drain pipe 19 discharges the quenching liquid for replacement.

[0033] A discharge port 20 is provided at the bottom of the quenching silo 6, and a baffle 21 is movably hingedly provided on the discharge port 20. A limiting ear plate 22 is provided at the bottom of the quenching silo 6 on the side opposite to the hinge. The limiting ear plates 22 are symmetrically arranged on both sides of the baffle 21. A through hole is opened on the limiting ear plate 22, and a limiting rod 23 is arranged in the through hole. The limiting rod 23 restricts and fixes the baffle 21 between the two limiting ear plates 22 to control the opening and closing of the discharge port 20, so as to facilitate the discharge of the quenched grinding balls. The baffle 21 can be flipped downward to open the discharge port 20 by removing the limiting rod 23; after flipping the baffle 21 upward to cover the discharge port 20, the limiting rod 23 can be inserted between the two limiting ear plates 22 to fix the baffle 21 to prevent the baffle 21 from automatically flipping downward to open the discharge port 20.

[0034] The working method of the utility model is as follows: the grinding balls to be quenched are placed in the quenching bin 6, and the screw motor 14 is started to drive the lifting screw 13 to operate, so as to drive the rotating frame 7 and the quenching bin 6 thereon to descend into the space between the quenching hoods 3, so as to adjust the positional relationship between the two, and ensure that the bottom and the top of the quenching bin 6 do not exceed the quenching hood 3, and then the quenching fan 5 is started to blow gas to each quenching hood 3 for isothermal quenching heat treatment. At the same time, the rotating motor 12 can also be started to drive the quenching bin 6 to rotate in the rotating frame 7, so that the grinding balls can properly roll in the quenching bin 6, increase the contact area with the gas, solve the problem that the grinding balls in the middle of the quenching bin 6 are in contact with a small amount of gas and a slow time, control the cooling speed of the grinding balls, improve the uniformity of the cooling of the grinding balls, and achieve the effect of continuous isothermal quenching.

[0035] When the gas quenching is completed, the screw motor 14 is started again to drive the lifting screw 13 to operate, driving the rotating frame 7 and the quenching bin 6 thereon to descend into the quenching liquid pool 2, contacting the quenching liquid for isothermal quenching heat treatment. At the same time, in order to increase the contact area between the grinding balls and the quenching liquid and achieve uniformity in cooling, the rotating motor 12 is started to drive the quenching bin 6 to rotate in the rotating frame 7, so that the grinding balls roll appropriately in the quenching bin 6 to increase the contact area with the quenching liquid.

[0036] When the liquid quenching is completed, start the screw motor 14 to drive the lifting screw 13 to operate, driving the rotating frame 7 and the quenching bin 6 thereon to rise and exit the quenching liquid pool 2. After the quenching liquid on the quenching bin 6 and the grinding balls is drained, first place a material guide trough under the discharge port 20 of the quenching bin 6, and then manually remove the limit rod 23 to open the discharge port 20 to discharge the grinding balls, and then enter the next self-tempering heat treatment process.

[0037] On the other hand, in order to realize the self-tempering heat treatment process on this device, the quenching fan 5 is set to be a quenching fan 5 with a heating function. After the liquid quenching is completed, the screw motor 14 is started to drive the lifting screw 13 to operate, driving the rotating frame 7 and the quenching silo 6 thereon to rise and exit the quenching liquid pool 2, and rise into the space between the quenching wind hoods 3. The quenching fan 5 is started to blow hot air to the quenching silo 6 and the grinding balls. While draining the quenching liquid on the quenching silo 6 and the grinding balls, the self-tempering heat treatment process of the grinding balls is realized.

Claims

1. A grinding ball continuous isothermal quenching heat treatment device, comprising a frame assembly (1), a quenching mechanism is arranged at the lower middle part of the frame assembly (1), a lifting mechanism is arranged at the top of the frame assembly (1), the lifting mechanism is connected downwardly to the quenching mechanism, and is characterized in that: The quenching mechanism comprises a quenching liquid pool (2), a quenching air hood (3), a quenching fan (5), a quenching material bin (6), a rotating frame (7), and a rotating motor (12). The quenching liquid pool (2) is arranged at the bottom of the frame assembly (1), the quenching air hood (3) is arranged relatively in the middle of the frame assembly (1), and is respectively located on the side walls of the frame assembly (1), the quenching material bin (6) is arranged on the rotating frame (7), and the two are dynamically matched. The rotating frame (7) is transmission-connected to a lifting mechanism, and the lifting mechanism drives the rotating frame (7) to perform lifting motion. A rotating motor (12) is arranged at the top center of the rotating frame (7), and the rotating motor (12) is downwardly connected to the quenching material bin (6) to drive the quenching material bin (6) to rotate.

2. The grinding ball continuous isothermal quenching heat treatment device according to claim 1, characterized in that: The rotating frame (7) is provided with a cylindrical frame structure, a supporting guide rail (8) with a protruding annular structure is provided on the inner side of the lower part of the rotating frame (7), a groove (9) is provided on the upper surface of the supporting guide rail (8), and a ball (10) is provided in each of the grooves (9), and a groove (9) adapted to the ball (10) is provided at the bottom of the quenching bin (6), and the quenching bin (6) is pressed onto the ball (10) through the groove (9).

3. The grinding ball continuous isothermal quenching heat treatment device according to claim 1 or 2, characterized in that: The quenching material bin (6) is provided in a cylindrical structure matched with the rotating frame (7), and through holes are provided on the bottom and side walls of the quenching material bin (6), and the diameter of the through holes is smaller than the diameter of the grinding balls.

4. The grinding ball continuous isothermal quenching heat treatment device according to claim 1 or 2, characterized in that: The quenching bin (6) is provided in a cylindrical structure adapted to the rotating frame (7); the bottom and side walls of the quenching bin (6) are provided in a mesh structure, and the mesh aperture is smaller than the diameter of the grinding balls; a driving frame in a cross or Y-shaped structure is provided on the top of the quenching bin (6); the center of the driving frame is connected to the rotating motor (12).

5. The grinding ball continuous isothermal quenching heat treatment device according to claim 1 or 2, characterized in that: The bottom and top of the rotating frame (7) are respectively provided with a bracket (11) of a cross or a cross-shaped structure, and the rotating motor (12) is arranged at the center of the bracket (11) at the top of the rotating frame (7).

6. The grinding ball continuous isothermal quenching heat treatment device according to claim 1 or 2, characterized in that: Each of the quenching hoods (3) is provided with a box body having an arc-shaped structure, the height of which is not less than the height of the quenching material bin (6), and a protruding quenching air hole (4) is provided on the inner side surface of the quenching hood (3), and a pipeline is provided on the back side to connect to the quenching fan (5).

7. The grinding ball continuous isothermal quenching heat treatment device according to claim 1, characterized in that: The lifting mechanism comprises a lifting screw (13), a screw motor (14), and a support (15); the lifting screw (13) is symmetrically arranged on the frame assembly (1); the bottom of each lifting screw (13) is fixedly arranged on the bottom of the quenching liquid pool (2) through the support (15), and a gap is arranged with the inner wall of the quenching liquid pool (2); the upper part is fixedly arranged on the top of the frame assembly (1) through the support (15); at least two screw nuts (16) are arranged on each lifting screw (13); the screw nuts (16) are connected to the rotating frame (7) to drive the rotating frame (7) to rise and fall; the screw motor (14) is arranged on the frame assembly (1) at the top of each lifting screw (13) and is connected to the lifting screw (13).

8. The grinding ball continuous isothermal quenching heat treatment device according to claim 1 or 2, characterized in that: A conical barrel (17) protruding upward is provided at the center of the inner bottom of the quenching silo (6), and the conical barrel (17) extends to the upper part of the quenching silo (6).

9. The grinding ball continuous isothermal quenching heat treatment device according to claim 1, characterized in that: The quenching liquid pool (2) is provided with a liquid inlet pipe (18) at the top and a liquid discharge pipe (19) at the bottom. Valves are provided on the liquid inlet pipe (18) and the liquid discharge pipe (19).

10. The grinding ball continuous isothermal quenching heat treatment device according to claim 1 or 2, characterized in that: The bottom of the quenching bin (6) is provided with a discharge port (20), a baffle (21) is movably hingedly provided on the discharge port (20), a limiting ear plate (22) is provided at the bottom of the quenching bin (6) on the side opposite to the hinged portion, the limiting ear plates (22) are symmetrically arranged on both sides of the baffle plate (21), a through hole is provided on the limiting ear plate (22), a limiting rod (23) is provided in the through hole, and the limiting rod (23) limits and fixes the baffle plate (21) between the two limiting ear plates (22) to control the opening and closing of the discharge port (20).

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