A swirl quenching tank

Abstract

The present application relates to a hydrocyclone quenching tank, belonging to the technical field of metal heat treatment. It includes a quenching inner tank and a quenching outer tank. The quenching inner tank is located inside the quenching outer tank, and the top surface of the quenching inner tank is lower than the top surface of the quenching outer tank. A quenching base is arranged inside the quenching inner tank, and the quenching base is used to place the heated product. It also includes a quenching tank for containing quenching oil. The oil liquid in the quenching tank is used to be transported to the quenching inner tank, and the oil liquid level in the quenching inner tank gradually rises to submerge the heated product. When the oil liquid in the quenching inner tank exceeds the top surface of the quenching inner tank, it enters the quenching outer tank and returns to the quenching tank. The quenching inner tank is provided with a first stirring member and a second stirring member. The first stirring member is used to stir the oil liquid in the quenching inner tank to make the oil liquid in a rotating state for quenching the outer ring of the product. The second stirring member is used to stir the oil liquid of the inner ring of the product to be in a rotating state for quenching the inner ring of the product. The present application has the effect of improving the quenching quality of the product.

Description

Technical Field

[0001] The present application relates to the technical field of metal heat treatment, and in particular to a hydro-quenching tank. Background Art

[0002] Heat treatment refers to a metal heat processing process in which materials are heated, kept warm, and cooled in a solid state to obtain the desired structure and properties. A certain quenching intensity is required during the heat treatment quenching process. Currently, in the heat treatment industry, methods such as product up and down movement, blowout spray systems, swirl liquid spraying on the product's outer inlet surface, and product rotation are used to ensure the quenching intensity. If press die quenching is used, it is necessary to open more complex and precise backflow grooves and oil holes inside the mold to ensure consistent cooling of the product inside and outside. Otherwise, deformation will be aggravated and soft spots will appear. The above methods can play a good role in the centralized quenching of stacked products and ring products with a diameter of less than 1m. However, they are difficult for heavy products (such as wind turbine main shaft bearing products), resulting in uneven hardness and quality problems that cannot be effectively controlled. Summary of the Invention

[0003] In order to improve the quenching quality of products, the present application provides a hydro-quenching tank.

[0004] The present application provides a hydro-quenching tank adopting the following technical solution:

[0005] A rotary liquid quenching tank comprises an inner quenching tank and an outer quenching tank, the inner quenching tank is located in the outer quenching tank, the top surface of the inner quenching tank is lower than the top surface of the outer quenching tank, a quenching base is provided in the inner quenching tank, and the quenching base is used to place the heated product; it also includes a quenching tank for holding quenching oil, the oil in the quenching tank is used to be transported to the inner quenching tank, the oil level in the inner quenching tank gradually rises and submerges the heated product, when the oil in the inner quenching tank passes over the top surface of the inner quenching tank, enters the outer quenching tank and returns to the quenching tank; the inner quenching tank is provided with a first stirring member and a second stirring member, the first stirring member is used to stir the oil in the inner quenching tank, so that the oil is in a rotating state and quenches the outer ring of the product; the second stirring member is used to stir the oil in the inner ring of the product in a rotating state and quenches the inner ring of the product.

[0006] Optionally, the first agitator includes an oil pump, an oil inlet pipe, an external spray pipe and an internal spray pipe connected to the quenching tank, the oil pump is used to inject oil into the oil inlet pipe, the oil inlet pipe is divided into two ways to enter the quenching inner tank, the external spray pipe is connected to one oil inlet pipe, and the internal spray pipe is connected to the other oil inlet pipe, the external spray pipe and the internal spray pipe are both ring-shaped, the diameter of the external spray pipe is larger than the diameter of the internal spray pipe, and the external spray pipe and the internal spray pipe are both provided with nozzles, and the angle between the nozzle and the external spray pipe and the internal spray pipe is 30°-60° and inclined in the same direction.

[0007] Optionally, the second stirring member includes a plurality of oil passing grooves formed in the quenching base, the oil passing grooves are inclined, and the inclination angle of the oil passing grooves is the same as the inclination angle of the nozzle.

[0008] Optionally, the second stirring member further includes a manifold pipe provided on the quenching base, the manifold pipe is connected to any number of oil passing grooves, and the angle is the same as that of the oil passing grooves. An oil inlet is provided on the side wall of the manifold pipe. The rotating oil liquid in the quenching inner tank enters the manifold pipe through the oil inlet and passes through the oil grooves into the inner ring of the product, thereby driving the oil liquid in the inner ring of the product to rotate.

[0009] Optionally, the cross-section of the manifold pipe is triangular, the corners of the manifold pipe face the rotation direction of the oil liquid, and the oil inlet is provided on the corner facing the oil liquid. An arc-shaped guiding platform is provided in the manifold pipe, and the guiding platform is used to change the flow direction of the oil liquid in the manifold pipe so that the oil liquid flows along the manifold pipe. The inner diameter of the manifold pipe gradually decreases to increase the oil injection pressure.

[0010] Optionally, the manifold pipe is provided with a sealing member for closing the oil inlet. When the liquid level in the quenching inner tank rotates upward and enters the inner ring of the product through the oil grooves, the sealing member closes the oil inlet. When the rotation speed of the oil liquid in the inner ring of the product decreases, the sealing member is used to open the oil inlet to make the oil liquid push the oil liquid in the inner ring of the product to rotate rapidly.

[0011] Optionally, a plurality of expanding blocks for fixing the product are provided on the quenching base, and a flow groove is provided between adjacent expanding blocks. The flow groove is inclined to form an included angle to make the oil liquid in the flow groove rotate and flow.

[0012] Optionally, two layers of mesh sheets are provided in the quenching inner tank. Both layers of mesh sheets are circular rings and are mutually adhered. A plurality of filtering holes are provided on the mesh sheets. The filtering holes on the two layers of mesh sheets are mutually connected. A gap is left between the mesh sheet close to the quenching inner tank and the quenching inner tank. When the oil liquid rotates, the impurities in the oil liquid pass through the filtering holes to the space between the mesh sheet and the inner wall of the quenching tank. The mesh sheet close to the quenching inner tank is rotatably arranged in the quenching inner tank, and the rotation axis of the mesh sheet is coaxial with the quenching inner tank. A driving member is further included for driving the mesh sheet to rotate and be misaligned with the outer mesh sheet to close the filtering holes.

[0013] Optionally, the driving member includes a driving motor provided at the top end of the quenching outer tank. The length direction of the output shaft of the driving motor is perpendicular to the axis direction of the quenching outer tank. A driving gear is provided on the output shaft of the driving motor. An annular rack is provided at the end of the mesh sheet close to the inner wall of the quenching inner tank. The driving gear and the annular rack are mutually engaged.

[0014] Optionally, the filtering holes are in an open shape and are connected to the mesh sheet, and the open surface of the filtering holes is arc-shaped.

[0015] In summary, the present application includes at least one of the following beneficial technical effects:

[0016] 1. When quenching the inner ring or outer ring of the bearing, the heated inner ring or outer ring of the bearing is placed on the quenching base, and then the quenching oil in the quenching tank is transported into the inner quenching tank. The liquid level in the inner quenching tank rises rapidly. Subsequently, the quenching oil is acted upon by the first stirring member, and the quenching oil rotates rapidly in the inner quenching tank to perform quenching operations on the outer rings of the inner and outer rings of the bearing. When the liquid level of the quenching oil rises to the quenching base, the second stirring member drives the oil liquid of the inner bearing ring to rotate, and the rotation of the oil liquid quenches the inner bearing ring. The quenching liquid in the inner quenching tank is in a rotating state at a certain rotation speed, ensuring that the quenching liquid on both the inner and outer diameters of the product is in a rotating state. Therefore, both the inner and outer diameter surfaces of the product are simultaneously in the rotating quenching liquid, enabling the product to be cooled evenly, thereby obtaining a product with good deformation and good hardness structure.

[0017] 2. The oil liquid in the inner quenching tank rotates freely upward to cool the product. When the liquid level of the rotating quenching liquid is higher than the height of the inner quenching tank, the quenching liquid flows into the outer quenching tank. The quenching liquid in the outer quenching tank enters the oil return pipeline along each oil return port by using the gravity difference and returns to the quenching tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of a swirling liquid quenching tank according to an embodiment of the present application;

[0019] Figure 2 is a schematic diagram of the structures of the inner quenching tank and the outer quenching tank in a swirling liquid quenching tank according to an embodiment of the present application;

[0020] Figure 3 is a schematic diagram of the structures of the rising block, the oil passing groove, and the flow groove on the quenching base in a swirling liquid quenching tank according to an embodiment of the present application;

[0021] Figure 4 is a schematic diagram of the structures of the quenching base and the confluence pipe in a swirling liquid quenching tank according to an embodiment of the present application;

[0022] Figure 5 is a cross-sectional view of the inner quenching tank and the outer quenching tank in a swirling liquid quenching tank according to an embodiment of the present application;

[0023] Figure 6 is Figure 5 an enlarged schematic view of part A in

[0024] Description of the reference numerals: 1, inner quenching tank; 2, outer quenching tank; 3, quenching base; 4, quenching tank;

[0025] 5, first stirring member; 51, oil pump; 52, inlet pipe; 53, outer spray pipeline; 54, inner spray pipeline; 55, nozzle;

[0026] 6. Second stirring member; 61. Oil passing groove; 62. Confluence pipe;

[0027] 7. Return oil pipe; 8. Oil inlet; 9. Sealing plate; 10. Expansion block; 11. Flow groove; 12. Mesh sheet; 13. Filter hole; 14. Driving motor; 15. Driving gear; 16. Annular rack. Detailed implementation manners

[0028] The following further elaborates on this application Figures 1-6 in conjunction with the attached drawings.

[0029] An embodiment of this application discloses a swirl quenching tank. Referring to Figure 1 and Figure 2 , the swirl quenching tank includes a quenching inner tank 1 and a quenching outer tank 2. The quenching inner tank 1 is located inside the quenching outer tank 2. The quenching outer tank 2 is fixedly arranged on the outer wall of the quenching inner tank 1. The top surface of the quenching inner tank 1 is lower than the top surface of the quenching outer tank 2. A quenching base 3 is arranged inside the quenching inner tank 1. The quenching base 3 is in a separated state from the bottom wall of the quenching inner tank 1. The quenching base 3 is used to place the heated product; it further includes a quenching tank 4 for containing quenching oil. The oil liquid in the quenching tank 4 is used to be transported to the quenching inner tank 1. The oil liquid level in the quenching inner tank 1 gradually rises to submerge the heated product. When the oil liquid in the quenching inner tank 1 exceeds the top surface of the quenching inner tank 1, it enters the quenching outer tank 2 and returns to the quenching tank 4; the quenching inner tank 1 is provided with a first stirring member 5 and a second stirring member 6. The first stirring member 5 is used to stir the oil liquid in the quenching inner tank 1 to make the oil liquid in a rotating state for quenching the outer ring of the product; the second stirring member 6 is used to stir the oil liquid of the inner ring of the product to be in a rotating state for quenching the inner ring of the product.

[0030] When quenching the inner ring or outer ring of a bearing, place the heated inner ring or outer ring of the bearing on the quenching base 3. Subsequently, the quenching oil in the quenching tank 4 is transported into the quenching inner tank 1. The liquid level in the quenching inner tank 1 rises rapidly. Subsequently, through the action of the first stirring member 5 on the quenching oil, the quenching oil rotates rapidly in the quenching inner tank 1 to perform quenching operations on the outer rings of the inner ring and outer ring of the bearing. When the oil liquid level rises to the quenching base 3, the second stirring member 6 drives the oil liquid of the inner ring of the bearing to rotate, and the rotation of the oil liquid quenches the inner ring of the bearing. The quenching liquid in the quenching inner tank 1 is in a rotating state at a certain rotation speed, ensuring that the quenching liquid on both the inner and outer diameters of the product is in a rotating state. Therefore, both the inner and outer diameter surfaces of the product are simultaneously in the rotating quenching liquid, making the product cool evenly, and thus obtaining a product with good deformation and good hardness structure.

[0031] Referring to Figure 1 and Figure 2 , in an embodiment of this application, a return oil pipe 7 is provided on the bottom wall of the quenching outer tank 2. The return oil pipe 7 is connected to the quenching tank 4.

[0032] Reference Figure 1 and Figure 2 In the embodiment of the present application, the first stirring member 5 includes an oil pump 51 communicated with the quenching tank 4, an oil inlet pipe 52, an external spraying pipeline 53 and an internal spraying pipeline 54. The oil pump 51 is used to inject oil into the oil inlet pipe 52. The oil inlet pipe 52 is divided into two paths to enter the inner quenching tank 1. The external spraying pipeline 53 is communicated with one path of the oil inlet pipe 52, and the internal spraying pipeline 54 is communicated with the other path of the oil inlet pipe 52. The external spraying pipeline 53 and the internal spraying pipeline 54 are both evenly distributed in a ring shape. The diameter of the external spraying pipeline 53 is larger than that of the internal spraying pipeline 54. Nozzles 55 are provided on both the external spraying pipeline 53 and the internal spraying pipeline 54. The included angle between the nozzle 55 and the external spraying pipeline 53 and the internal spraying pipeline 54 is 30°-60° and is inclined in the same direction. When quenching, the oil pump 51 is started. The oil pump 51 extracts the quenching oil in the quenching tank 4 and enters it into the oil inlet pipe 52. The oil in the oil inlet pipe 52 is divided into two paths and enters the external spraying pipeline 53 and the internal spraying pipeline 54 respectively. The oil in the external spraying pipeline 53 and the internal spraying pipeline 54 is ejected through the nozzles 55. At this time, the liquid level in the inner quenching tank 1 gradually rotates and rises, and the operation is simple and convenient.

[0033] Reference Figure 2 、 Figure 3 and Figure 4 In the embodiment of the present application, the second stirring member 6 includes a plurality of oil passing grooves 61 opened on the quenching base 3. The oil passing grooves 61 are inclinedly opened, and the inclination angle of the oil passing grooves 61 is the same as the inclination angle of the nozzle 55; the liquid level in the inner quenching tank 1 gradually rises, and the quenching oil passes through the oil passing grooves 61 over the quenching base 3 and passes through the inclined oil passing grooves 61, so that the oil in the inner ring of the bearing rotates and rises to quench the inner ring of the bearing, and the operation is simple and convenient.

[0034] Reference Figure 2 、 Figure 3 and Figure 4 When the liquid level of the quenching oil exceeds the quenching base 3, the pushing effect of the oil passing through the oil passing grooves 61 on the quenching oil decreases, which easily causes the rotation speed of the quenching oil in the inner ring of the bearing to decrease. Therefore, in the embodiment of the present application, the second stirring member 6 further includes a confluence pipe 62 provided on the quenching base 3. The confluence pipe 62 is communicated with any number of oil passing grooves 61, and the angle is the same as that of the oil passing grooves 61. An oil inlet 8 is opened on the side wall of the confluence pipe 62. The rotating oil in the inner quenching tank 1 enters the confluence pipe 62 through the oil inlet 8 and passes through the oil passing grooves 61 into the inner ring of the product to drive the oil in the inner ring of the product to rotate. When the oil in the inner quenching tank 1 rotates, part of the oil enters the confluence pipe 62 through the oil passing port. The quenching oil flows along the confluence pipe 62 and passes through the oil passing grooves 61 into the inner ring of the bearing, thereby driving the quenching oil to rotate and improving the quenching quality of the bearing.

[0035] Reference Figure 2 、 Figure 3 and Figure 4In order to reduce the obstruction of the manifold 62 to the rotating oil in the quenching inner tank 1, the cross-section of the manifold 62 is triangular, the corners of the manifold 62 face the rotation direction of the oil, and the oil inlet 8 is opened on the corner facing the oil, and an arc-shaped guide platform is provided in the manifold 62, which is used to convert the flow direction of the oil in the manifold 62 and make the oil flow along the manifold 62. The inner diameter of the manifold 62 gradually decreases to increase the oil injection pressure; the corners of the manifold 62 face the rotating oil, which reduces the obstruction of the manifold 62 to the rotating oil; and under the action of the guide platform, the oil entering the manifold 62 is guided, and the rebound of the oil impacting the inner wall of the manifold 62 is reduced, which facilitates the quenching oil to flow along the manifold 62; and the inner diameter of the manifold 62 gradually decreases, which facilitates the pressure of the quenching oil passing through the manifold 62 to gradually increase, and facilitates the oil arc rotation and rise.

[0036] Reference Figure 2 、 Figure 3 and Figure 4 In the embodiment of the present application, the manifold 62 is provided with a closing member for closing the oil inlet 8. The closing member is used to close the oil inlet 8 when the liquid level in the quenching inner tank 1 rotates and rises and passes through the oil tank 61 into the inner ring of the product. When the rotation speed of the oil in the inner ring of the product decreases, it is used to open the oil inlet 8 so that the oil pushes the oil in the inner ring of the product to rotate rapidly. The closing member includes a mounting shaft arranged in the oil inlet 8, a closing plate 9 arranged on the mounting shaft, and a micro motor embedded in the oil inlet 8. The micro motor is used to drive the closing plate 9 to rotate.

[0037] When the oil in the quenching inner tank 1 rotates and rises, the oil inlet 8 of the manifold 62 is in a closed state (to prevent the quenching oil from being sprayed onto the top of the quenching base 3 through the manifold 62 when the oil in the quenching inner tank 1 initially rises, and then sprayed onto the inner ring of the bearing, thereby avoiding the possibility of uneven cooling of the inner ring of the bearing). Therefore, when the liquid level in the quenching inner tank 1 rotates and rises and passes over the quenching base 3, and gradually submerges the inner ring or outer ring of the bearing, the manifold 62 is in a closed state. When the rotation speed of the oil in the inner ring of the bearing decreases, the micromotor is started, and the micromotor drives the hinged shaft to rotate, driving the closing plate 9 to rotate and open the oil inlet 8, thereby increasing the oil inlet pressure of the quenching oil, thereby driving the quenching oil to rotate.

[0038] Reference Figure 2 、 Figure 3 and Figure 4 In the embodiment of the present application, a plurality of expansion blocks 10 for fixing the product are provided on the quenching base 3. Under the action of the expansion blocks 10, the product is fixed, and the possibility of product shaking is reduced; a flow groove 11 is left between adjacent expansion blocks 10, and the flow groove 11 is inclined to form an angle so that the oil in the oil groove 61 rotates and flows. Under the action of the flow groove 11, the oil rotates and flows between the expansion blocks 10, thereby facilitating the rotation of the quenching oil.

[0039] Reference Figure 5 and Figure 6 , after the quenching oil quenches the product, there are many impurities in the quenching oil, and the quenching oil needs to be maintained regularly to ensure the quenching effect of the product. Therefore, in the embodiment of the present application, in order to facilitate the maintenance of the quenching oil, two layers of mesh 12 are provided in the quenching inner tank 1. The two layers of mesh 12 are annular and fit together. A plurality of filter holes 13 are opened on the mesh 12. The filter holes 13 on the two layers of mesh 12 are connected to each other. There is a gap between the mesh 12 close to the quenching inner tank 1 and the quenching inner tank 1. When the oil rotates, impurities in the oil pass through the filter holes 13 to between the mesh 12 and the inner wall of the quenching tank 4. The mesh 12 close to the quenching inner tank 1 is rotatably arranged in the quenching inner tank 1. The rotation axis of the mesh 12 is coaxial with the quenching inner tank 1, and further includes a driving member for driving the mesh 12 to rotate and dislocate with the outer mesh 12 to close the filter holes 13;

[0040] Reference Figure 5 and Figure 6 The driving part includes a driving motor 14 fixedly arranged at the top of the quenching outer tank 2. The length direction of the output shaft of the driving motor 14 is perpendicular to the axial direction of the quenching outer tank 2. A driving gear 15 is provided on the output shaft of the driving motor 14. An annular rack 16 is fixedly provided at the end of the mesh 12 near the inner wall of the quenching inner tank 1, and the driving gear 15 and the annular rack 16 are engaged with each other.

[0041] When the quenching oil rotates and rises in the quenching inner tank 1, on the one hand, it quenches the product, and on the other hand, it drives the impurities in the quenching oil to move toward the inner wall under the action of centrifugal force. When the impurities approach the mesh 12, the impurities pass through the mesh 12 through the filter holes 13, and the impurities are temporarily sealed between the mesh 12 and the inner wall of the quenching inner tank 1. When the product is quenched, the drive motor 14 is started, and the drive motor 14 drives the drive gear 15 to rotate. The drive gear 15 drives the annular rack 16 to move, and the annular rack 16 drives the outer mesh 12 to move so that the filter holes 13 on the two layers of mesh 12 are staggered with each other, and the impurities and quenching oil are sealed inside. The sealed impurities and quenching oil are then extracted, thereby reducing the impurities in the quenching oil, and maintaining the quenching oil while quenching the product, thereby improving the quenching effect of the product.

[0042] Reference Figure 5 and Figure 6 In the embodiment of the present application, in order to reduce the obstruction of the inner wall of the filter hole 13 to the rotating oil, the filter hole 13 is open and connected to the mesh 12, and the open surface of the filter hole 13 is arc-shaped.

[0043] In the embodiment of the present application, the liquid level in the quenching inner tank 1 is raised by 300 mm, which is completed within 5 seconds.

[0044] Use \(T = \pi\times D\times D\times H\div(4\times Q\times n\times k)\) to calculate the time for the liquid level of the quenching oil to rise, and select the parameters and number of quenching pumps at the same time.

[0045] In the formula: \(D\): Inner diameter of the hydrocyclone quenching tank, m;

[0046] \(H\): Height of the liquid level rise, m;

[0047] \(Q\): Flow rate of the oil pump 51, \(m^3 / h\);

[0048] \(n\): Number of oil pumps 51, unit;

[0049] \(k\): Coefficient, generally taken as 0.8 - 0.9;

[0050] \(T\): Time required for the liquid level to rise by \(H\), h;

[0051] 2) Ensure that the quenching liquid is in a rotating state after contacting the product.

[0052] To ensure that the quenching liquid can rotate and rise, the following requirements must be met: The angle between the nozzle 55 on the external spray pipeline 53 and the external spray pipeline 53 is 30° - 60°, generally 45°; The angle between the nozzle 55 on the internal spray pipeline 54 and the internal spray pipeline is 30° - 60°, generally 45°; The specification selection of the spray pipe meets: \(m\times d2\times d2 = d1\times d1\times f\), and at the same time select the designed number of nozzles 55.

[0053] In the formula: \(d2\): Inner diameter of the nozzle 55, mm;

[0054] \(d1\): Inner diameter of the main pipe of the external spray pipeline 53 / internal spray pipeline 54, mm;

[0055] \(m\): Number of sprays, unit;

[0056] \(f\): Coefficient, generally taken as 0.9 - 0.95;

[0057] 3) The quenching liquid in this quenching tank 4 realizes liquid return by gravity difference

[0058] The horizontal height of the liquid return port of the quenching outer tank 2 must be more than 1.2 m higher than the liquid level of the common quenching tank 4, so as to realize liquid return by gravity difference, and at the same time meet the following requirements: \(a\times d3\times d3 = d1\times d1\times g\), and determine the number of liquid return ports at the same time.

[0059] In the formula: \(a\): Number of liquid return ports, unit;

[0060] \(d3\): Inner diameter of the return pipe, mm;

[0061] \(d1\): Inner diameter of the main pipe of the external spray pipeline 53 / internal spray pipeline 54, mm;

[0062] \(g\): Coefficient, generally taken as 3 - 4.

[0063] An electronic starting hammer valve is installed on the two-way oil inlet pipe 52. The hammer valve is opened during quenching, and the unloading amount of oil is controlled by controlling the closing delay time of the hammer valve after quenching is completed. At the same time, the liquid level gauge is used to accurately control the oil level height after unloading.

[0064] The implementation principle of a hydrocyclone quenching tank in an embodiment of this application is as follows:

[0065] When the quenching button is pressed, each oil pump 51 extracts quenching liquid from the common quenching tank 4, and at the same time, the oil inlet hammer valve of the oil inlet pipe 52 is opened. The quenching liquid sequentially enters the oil inlet pipe 52, the outer spray pipeline 53, and the inner spray pipeline 54, and then enters the nozzles 55 that are evenly distributed in the circumferential direction and have a certain included angle. Subsequently, it is sprayed onto the quenching inner tank 1. The quenching liquid in the quenching inner tank 1 rotates and rises. When the rotating quenching liquid level rises to the oil overflow tank 61 of the quenching base 3, the outer side of the product is cooled by the freely rotating and rising quenching liquid (the time from pressing the start button to the quenching liquid covering the product ≤ 5 s). When the quenching oil liquid is higher than the height of the quenching inner tank 1, the quenching liquid flows into the quenching outer tank 2. The quenching liquid in the quenching outer tank 2 enters the return oil pipe 7 along each oil return port by using the gravity difference and returns to the common quenching tank 4.

[0066] The above are all preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A hydro-quenching tank, characterized in that: The invention comprises an inner quenching tank (1) and an outer quenching tank (2), wherein the inner quenching tank (1) is located in the outer quenching tank (2), the top surface of the inner quenching tank (1) is lower than the top surface of the outer quenching tank (2), and a quenching base (3) is provided in the inner quenching tank (1), and the quenching base (3) is used to place the heated product; and further comprises a quenching tank (4) for containing quenching oil, the oil in the quenching tank (4) is used to be transported to the inner quenching tank (1), and the oil level in the inner quenching tank (1) gradually rises and submerges the heated product. After the product is heated, the oil in the quenching inner tank (1) passes over the top surface of the quenching inner tank (1), enters the quenching outer tank (2) and returns to the quenching tank (4); the quenching inner tank (1) is provided with a first stirring member (5) and a second stirring member (6), the first stirring member (5) is used to stir the oil in the quenching inner tank (1), so that the oil is in a rotating state and the outer ring of the product is quenched; the second stirring member (6) is used to stir the oil in the inner ring of the product in a rotating state and the inner ring of the product is quenched; The first stirring member (5) comprises an oil pump (51), an oil inlet pipe (52), an external spray pipe (53) and an internal spray pipe (54) connected to the quenching tank (4); the oil pump (51) is used to inject oil into the oil inlet pipe (52); the oil inlet pipe (52) is divided into two routes to enter the quenching inner tank (1); the external spray pipe (53) is connected to one oil inlet pipe (52); the internal spray pipe (54) is connected to the other oil inlet pipe (52); the external spray pipe (53) and the internal spray pipe (54) are both annular; the diameter of the external spray pipe (53) is larger than that of the internal spray pipe (54); a nozzle (55) is provided on each of the external spray pipe (53) and the internal spray pipe (54); the nozzle (55) forms an angle of 30°-60° with the external spray pipe (53) and the internal spray pipe (54) and is inclined in the same direction; The second stirring member (6) includes a plurality of oil passage grooves (61) provided on the quenching base (3), wherein the oil passage grooves (61) are provided at an angle, and the angle of inclination of the oil passage grooves (61) is consistent with the angle of inclination of the spray head (55); The second stirring member (6) further comprises a manifold (62) arranged on the quenching base (3), the manifold (62) being connected to any number of oil grooves (61) and having an angle consistent with the oil grooves (61), an oil inlet (8) being provided on the side wall of the manifold (62), and the rotating oil in the quenching inner tank (1) enters the manifold (62) through the oil inlet (8) and enters the inner ring of the product through the oil grooves (61), thereby driving the oil in the inner ring of the product to rotate; The cross section of the manifold (62) is triangular, the corners of the manifold (62) face the rotation direction of the oil, and the oil inlet (8) is opened on the corners facing the oil. The inner diameter of the manifold (62) gradually decreases to increase the oil injection pressure.

2. The hydrocyclone quenching tank according to claim 1, characterized in that: An arc-shaped guide platform is provided in the manifold (62), and the guide platform is used to convert the flow direction of the oil in the manifold (62) so that the oil flows along the manifold (62).

3. The hydrocyclone quenching tank according to claim 1, characterized in that: The manifold (62) is provided with a closing member for closing the oil inlet (8). The closing member is used to close the oil inlet (8) when the liquid level in the quenching inner tank (1) rotates and rises and enters the inner ring of the product through the oil tank (61). When the rotation speed of the oil in the inner ring of the product decreases, the oil inlet (8) is opened to allow the oil to push the oil in the inner ring of the product to rotate rapidly.

4. The hydrocyclone quenching tank according to claim 1, characterized in that: The quenching base (3) is provided with a plurality of expansion blocks (10) for fixing products, and flow grooves (11) are left between adjacent expansion blocks (10). The flow grooves (11) are inclined to form an angle so that the oil in the flow grooves (11) rotates and flows.

5. The hydrocyclone quenching tank according to claim 1, characterized in that: Two layers of mesh (12) are arranged in the quenching inner tank (1). The two layers of mesh (12) are annular and fit together. A plurality of filter holes (13) are opened on the mesh (12). The filter holes (13) on the two layers of mesh (12) are connected to each other. A gap is left between the mesh (12) close to the quenching inner tank (1) and the quenching inner tank (1). When the oil rotates, impurities in the oil pass through the filter holes (13) to the space between the mesh (12) and the inner wall of the quenching tank (4). The mesh (12) close to the quenching inner tank (1) is rotatably arranged in the quenching inner tank (1). The rotation axis of the mesh (12) is coaxial with the quenching inner tank (1). The mesh (12) further includes a driving member for driving the mesh (12) to rotate and dislocate with the outer mesh (12) to close the filter holes (13).

6. The hydrocyclone quenching tank according to claim 5, characterized in that: The driving member comprises a driving motor (14) arranged at the top end of the quenching outer tank (2), the length direction of the output shaft of the driving motor (14) is perpendicular to the axial direction of the quenching outer tank (2), a driving gear (15) is arranged on the output shaft of the driving motor (14), and an annular rack (16) is arranged at the end of the mesh (12) close to the inner wall of the quenching inner tank (1), and the driving gear (15) and the annular rack (16) are meshed with each other.

7. The hydrocyclone quenching tank according to claim 5, characterized in that: The filter hole (13) is open and connected to the mesh (12), and the open surface of the filter hole (13) is arc-shaped.

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