An austempered ductile iron salt bath apparatus and method of use thereof

Abstract

The application relates to the technical field of isothermal quenching, and discloses an isothermal quenching nodular cast iron salt bath device and a use method thereof, which comprises a salt bath pool and a plurality of stirring mechanisms, a steel rotating shaft is installed on the inner wall of the bottom of the salt bath pool, symmetrical steel supports are installed on the steel rotating shaft, an arc-shaped shell is further fixedly installed on the steel support, long spiral blades are arranged in the arc-shaped shell, a collecting part is further arranged on the steel support, and the collecting part and the arc-shaped shell are connected through a transfer channel. The isothermal quenching nodular cast iron salt bath device is used for enabling the steel support to drive the long spiral blades to perform circumferential motion in the salt bath pool and rotation in the arc-shaped shell at the same time, so that the slag near the long spiral blades is captured, the slag is thrown into the arc-shaped shell under the action of the rotation of the long spiral blades, and the slag is settled in the detachable frame through the transfer channel, so that the slag in the salt bath pool can be effectively collected.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of isothermal quenching, in particular to an isothermal quenching nodular cast iron salt bath device and a use method thereof. BACKGROUND

[0002] Isothermal quenching refers to a quenching mode in which a workpiece is quenched after heating and kept at a temperature in a lower bainite transformation zone for a long time to complete isothermal transformation of austenite and obtain a lower bainite structure, and a typical process of isothermal quenching of nodular cast iron is as follows: firstly, a nodular cast iron original piece is heated to austenitizing temperature (840-950 DEG C) and kept for 1-2 hours to completely transform into carbon-rich austenite, then the original piece is rapidly quenched into a salt bath at an austenite isothermal transformation temperature (250-400 DEG C) and kept for 1-2 hours, and then the original piece is taken out of the furnace and air-cooled to room temperature.

[0003] Salt bath treatment of isothermal quenching nodular cast iron is a heat treatment process for promoting transformation of austenite into bainite by accurately controlling temperature and time, the nodular cast iron after austenitizing is rapidly transferred to a salt bath tank slightly higher than a martensite start temperature (Ms point), an isothermal environment is maintained, austenite is fully decomposed into lower bainite or upper bainite structure, and hard and brittle martensite is not directly generated, molten salt (such as a mixed salt of potassium nitrate and sodium nitrite) has high thermal conductivity, ensures that the workpiece is rapidly cooled to an isothermal zone and keeps temperature uniform, and isolates oxygen to reduce oxidation and decarburization.

[0004] During the salt bath treatment of the isothermal quenching nodular cast iron, oxidation reaction easily occurs on the surface of the cast iron workpiece to generate metal oxides, the oxides remaining in the salt bath pool form dregs, and the salt bath medium of the salt bath pool may contain impurities, which react with metals or decompose by themselves at high temperature to generate dregs; since the density of the dregs is usually greater than that of the salt bath liquid, the dregs sink to the bottom under the action of the upward buoyancy force smaller than the downward gravity; however, the dregs deposited at the bottom of the salt bath pool may contain impurities or incompletely reacted salts, which change the composition of the salt bath, and the change in the composition may affect the thermal physical properties of the salt bath, such as heat capacity and thermal conductivity, and further affect the heat conduction performance; therefore, the dregs at the bottom of the salt bath pool are usually cleaned regularly, and the commonly used cleaning method is manual cleaning, and the dregs deposited in the pool body usually need to be treated by using reagents and stopping the furnace, and the dregs in the pool are fished out by workers using special tools, manual fishing of the dregs depends on experience, and work in a high-temperature environment is easy to cause burns, and when the dregs are cleaned by stopping the furnace, work efficiency is affected on one hand, and on the other hand, there is a risk of explosion or corrosion of equipment if the cooling treatment is improper, therefore, the application provides an isothermal quenching nodular cast iron salt bath device and a use method thereof. SUMMARY

[0005] The purpose of this invention is to provide an isothermal quenching salt bath device for ductile iron and its usage method, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an isothermal quenching salt bath device for ductile iron, comprising a salt bath tank, multiple stirring mechanisms installed on both sides of the salt bath tank, wherein the stirring ends of the stirring mechanisms extend into the interior of the salt bath tank, a motor housing is fixedly installed on the outer wall of the bottom of the salt bath tank, and a motor unit is fixedly installed inside the motor housing, and a steel rotating shaft is installed on the inner wall of the bottom of the salt bath tank and rotatably connected to it, the steel rotating shaft and the output end of the motor unit are transmitted through a magnetic coupling mechanism, wherein steel supports are symmetrically installed on the steel rotating shaft, and the motor unit utilizes the magnetic coupling mechanism... The steel shaft is controlled to rotate, thereby driving the steel support to rotate at the bottom of the salt bath. The steel support is also fixedly mounted at both ends, and each frame is fixedly mounted at both ends. An arc-shaped shell is also fixedly mounted on the steel support, and a long spiral blade is set inside the arc-shaped shell. The two ends of the long spiral blade pass through the side wall of the arc-shaped shell and are rotatably connected to the mounting part. During the circular motion of the long spiral blade, the liquid in the salt bath acts on the long spiral blade to make it rotate. The steel support is also equipped with a collection part, which is connected to the arc-shaped shell through a transfer channel.

[0007] Preferably, the collection unit includes a fixed housing fixedly installed on the side wall of a steel support, a placement chamber located inside the fixed housing and capable of being pulled upwards, and a detachable frame fixed to the bottom of the placement chamber by bolts. The slag inside the arc-shaped housing is transported to the fixed housing through a transfer channel, and a through hole is provided on one side of the placement chamber, through which the slag in the transfer channel enters the placement chamber.

[0008] Preferably, the arc-shaped shell and the long spiral blades are inclined downwards from the steel rotating shaft towards the pool wall in the salt bath. The inclination angle of the long spiral blades is 25°-35°, so that when the long spiral blades rotate, the working surface of the blades forms a coupling effect of centrifugal force and gravity, which guides the slag to slide to the outside of the blades and fall into the arc-shaped shell.

[0009] Preferably, the pitch of the long spiral blades near the inner wall of the salt bath is greater than the pitch of the long spiral blades near the steel shaft.

[0010] Preferably, the arc-shaped shell, the transfer channel, the fixed shell, and the placement chamber are all provided with filter holes to intercept the slag.

[0011] Preferably, the connection between the transfer channel and the arc-shaped shell is designed in a funnel shape to facilitate the entry of waste into the transfer channel.

[0012] Preferably, a plurality of connecting sleeves are installed in parallel on each steel support, and a short helical blade is installed in each connecting sleeve and rotationally connected thereto, and the axis of the short helical blade is perpendicular to the bottom of the salt bath pool, wherein a plurality of hammer bodies are arranged between the short helical blades, and a spherical connecting portion is installed on the top of each hammer body, and each spherical connecting portion is connected to the steel support through a mounting sleeve, and the spherical connecting portion is movably connected to the mounting sleeve, and a spring connected to the spherical connecting portion is installed in the mounting sleeve, and a flow guide groove is formed in the surface of the hammer body.

[0013] Preferably, a plurality of inclined plates are fixedly installed in the placement chamber and the arc-shaped housing, and an arc-shaped plate body is further fixedly installed at the bottom of each inclined plate, and the arc-shaped plate body prevents backflow of the slag.

[0014] Preferably, a honeycomb-shaped plate frame is further fixedly installed in the salt bath pool, and the honeycomb-shaped plate frame is provided with an inclined channel, and the honeycomb-shaped plate frame is located above the rotating shaft.

[0015] A method for using an isothermal quenching nodular cast iron salt bath device, specifically comprising the following steps:

[0016] S1: The workpiece falls into the salt bath pool, and the stirring mechanism rotates in the salt bath pool to promote heat exchange between the salt bath and the workpiece, and the slag in the salt bath pool flows through the honeycomb-shaped plate frame under the action of gravity and accelerates the sinking of the slag through the inclined channel of the honeycomb-shaped plate frame;

[0017] S2: The motor unit is started at a fixed time, and the steel rotating shaft slowly rotates at the bottom of the salt bath pool under the transmission of the magnetic coupling mechanism, the steel support on the steel rotating shaft rotates synchronously, the rack, mounting portion, long helical blade, and arc-shaped housing on the steel support rotate synchronously, and the salt bath liquid acts on the surface of the long helical blade during the circumferential motion of the long helical blade, causing the long helical blade to rotate in the arc-shaped housing to capture the slag near the long helical blade and throw it into the arc-shaped housing under the action of the rotation of the long helical blade, causing the slag to flow to the bottom of the arc-shaped housing under the coupling action of the centrifugal force and gravity, and finally enter the transfer channel along with the flow of the salt bath liquid;

[0018] S3: The slag in the transfer channel enters the fixed housing relying on the flow of the salt bath liquid, and the slag entering the fixed housing finally enters the placement chamber through the through hole, and the slag in the placement chamber is deposited into the detachable frame under the action of gravity, and the staff regularly takes out the placement chamber and cleans the slag therein;

[0019] S4: When the steel support is in circumferential motion, the connecting sleeve on the steel support drives the short spiral blade to move synchronously, in this process, the short spiral blade rotates, and the liquid near the short spiral blade is disturbed, so that the hammer swings, the rotation of the short spiral blade and the swing of the hammer can stir the slag deposited at the bottom of the salt bath pool, and break the static deposition state of the slag;

[0020] S6: The workpiece leaves the salt bath pool, the rotating speed of the stirring mechanism is reduced, and the motor unit stops after rotating a certain number of complete circles.

[0021] Compared with the prior art, the beneficial effects of the present application are:

[0022] The steel shaft of the present application drives the long spiral blade to rotate in the arc-shaped shell while the long spiral blade is in circumferential motion in the salt bath pool, so that the slag near the long spiral blade is captured, and the slag is thrown into the arc-shaped shell under the action of the rotation of the long spiral blade, so that the slag flows to the bottom of the arc-shaped shell under the coupling action of the centrifugal force and the gravity, and finally enters the transfer channel, and then enters the detachable frame to settle, so that the slag in the salt bath pool can be effectively collected, which reduces the influence of the slag on the salt bath pool, and improves the work efficiency.

[0023] The pitch of the long spiral blade is designed in the present application, and the change of the pitch enables the long spiral blade with small pitch to contact the salt bath more closely during rotation, so as to generate stronger shear force and turbulent effect, which helps to break the laminar flow state in the salt bath, promotes the rapid mixing of salt baths in different regions, improves the mixing efficiency, and the design of large pitch effectively reduces the contact area between the blade and the salt bath, thereby reducing the resistance during the rotation of the long spiral blade, which helps to reduce energy consumption and improve the operating efficiency of the long spiral blade.

[0024] The short spiral blade and the hammer of the present application can effectively stir the slag deposited at the bottom of the salt bath pool, break the static deposition state of the slag, and the stirred slag is more easily carried by the water flow to form a suspended state, which facilitates the collection of the slag by the long spiral blade, and improves the collection quality of the slag. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is an internal schematic diagram of the overall structure of the present application;

[0026] Figure 2 It is an internal structure schematic diagram of the salt bath pool of the present application;

[0027] Figure 3 It is a structure schematic diagram of the steel support of the present application;

[0028] Figure 4It is a top view schematic diagram of the internal partial structure of the salt bath pool of the present application.

[0029] Figure 5 It is a schematic diagram of the long spiral blade structure of the present application.

[0030] Figure 6 It is a schematic diagram of the long spiral blade and arc-shaped housing structure of the present application.

[0031] Figure 7 It is a schematic diagram of the collection part structure of the present application.

[0032] Figure 8 It is a schematic diagram of the internal structure of the fixed housing and the placement chamber of the present application.

[0033] Figure 9 It is a schematic diagram of the short spiral blade and hammer body structure of the present application.

[0034] Figure 10 It is a schematic diagram of the hammer body and mounting sleeve structure of the present application.

[0035] In the figure: 1, salt bath pool; 2, stirring mechanism; 3, motor housing; 4, motor unit; 5, steel rotating shaft; 6, steel support; 61, rack; 62, mounting part; 63, arc-shaped housing; 64, long spiral blade; 7, collection part; 71, fixed housing; 72, placement chamber; 73, detachable frame; 74, through hole; 8, transfer channel; 9, filter hole; 10, connecting sleeve; 101, short spiral blade; 102, hammer body; 103, spherical connecting part; 104, mounting sleeve; 105, spring; 106, flow guide groove; 11, inclined plate; 111, arc-shaped plate body; 12, honeycomb plate rack; 13, inclined channel. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0037] Please refer to Figures 1-10This invention provides a technical solution: an isothermal quenching salt bath device for ductile iron. This invention addresses the technical problems in the background art by making corresponding improvements. It includes a salt bath 1, multiple stirring mechanisms 2 installed on both sides of the salt bath 1, with the stirring ends of the stirring mechanisms 2 extending into the interior of the salt bath 1. Since installing the stirring mechanisms 2 inside the salt bath 1 is existing technology, this invention does not describe it in detail. A honeycomb-shaped plate frame 12 is also fixedly installed inside the salt bath 1. The honeycomb-shaped plate frame 12 also has an inclined channel 13, and is located above the rotating shaft. Combined with the attached... Figure 1 As shown, the stirring mechanism 2 operates, causing the liquid in the salt bath 1 to flow, which can effectively eliminate the temperature difference between different areas. Since the density of the sludge is usually greater than that of the salt bath liquid, the buoyancy of the sludge in the salt bath liquid is less than the downward gravity, so it sinks to the bottom of the salt bath 1. During the sinking process, it passes through the honeycomb plate frame 12, and the inclined channel 13 of the honeycomb plate frame 12 can accelerate the sedimentation process through gravity. The angle of the inclined channel 13 needs to be specifically designed according to the settling speed of the sludge particles and the viscosity of the salt bath liquid. Generally speaking, the inclination angle of the inclined channel 13 is 45°-60°. Under specific circumstances, the angle of the inclined channel 13 can be designed accordingly.

[0038] Combined with appendix Figure 2As shown, the outer wall of the bottom of the salt bath tank 1 is fixedly installed with a motor housing 3, and the motor unit 4 is fixedly installed inside the motor housing 3, the inner wall of the bottom of the salt bath tank 1 is installed with a steel rotating shaft 5 which is rotatably connected with the inner wall thereof, the steel rotating shaft 5 and the output end of the motor unit 4 are driven through a magnetic coupling mechanism, it is further explained that the magnetic coupling technology transmission is a non-contact transmission mode based on the magnetic field interaction to realize power transmission, the core lies in that the torque is transmitted by using the magnetic field, and the direct physical contact in the traditional mechanical transmission is avoided, it should be noted that the above and the following structure components located in the salt bath tank 1 are all made of high-temperature-resistant materials to ensure the working life of the structure, wherein the steel rotating shaft 5 is symmetrically installed with a steel support 6, the motor unit 4 controls the rotation of the steel rotating shaft 5 by using the magnetic coupling mechanism to drive the steel support 6 to rotate at the bottom of the salt bath tank 1, the steel support 6 is further fixedly installed with a rack 61, and each rack 61 is fixedly installed with a mounting portion 62 at both ends thereof, wherein the steel support 6 is further fixedly installed with an arc-shaped shell 63, and a long spiral blade 64 is arranged in the arc-shaped shell 63, both ends of the long spiral blade 64 penetrate through the side wall of the arc-shaped shell 63 and are rotatably connected with the mounting portion 62 respectively, and the long spiral blade 64 is also rotatably connected with the arc-shaped shell 63, in the process of the circumferential motion of the long spiral blade 64, the liquid in the salt bath tank 1 acts on the long spiral blade 64 to make it rotate, wherein the pitch of the long spiral blade 64 close to the inner wall of the salt bath tank 1 is greater than that of the long spiral blade 64 close to the steel rotating shaft 5, and the arc-shaped shell 63 and the long spiral blade 64 are arranged in an inclined downward manner from the steel rotating shaft 5 to the wall of the salt bath tank 1, and the inclination angle of the long spiral blade 64 is 25°-35°, so that the blade working surface of the long spiral blade 64 forms a centrifugal force and gravity coupling effect when the long spiral blade 64 rotates, which guides the slag to slide to the outside of the blade and fall into the arc-shaped shell 63;

[0039] Further, combined with the accompanying drawings Figure 5 As shown, the pitch of the long spiral blade 64 close to the inner wall of the salt bath tank 1 is greater than that of the long spiral blade 64 close to the steel rotating shaft 5 in the application, the pitch of the long spiral blade 64 close to the steel rotating shaft 5 is designed to be smaller mainly to make the blade of the long spiral blade 64 more closely contact the salt bath liquid when rotating, so as to generate stronger shear force and turbulent effect, which helps to break the laminar flow state in the salt bath, promotes the rapid mixing of the salt bath in different regions, improves the mixing efficiency, and the turbulent stirring can more effectively transfer the heat and substances in the salt bath to the whole tank body, reduces the phenomenon of local overheating or uneven mixing, thereby improving the product quality; and the pitch of the long spiral blade 64 close to the inner wall of the salt bath tank 1 is designed to be larger mainly to reduce the contact area between the blade and the salt bath, thereby reducing the resistance in the rotating process of the long spiral blade 64, which helps to reduce the energy consumption and improve the operating efficiency of the long spiral blade 64.

[0040] Further, combined with the accompanying drawings Figure 6 , the accompanying drawingsFigure 7 and attached Figure 8 As shown in the drawings, the steel support 6 is further provided with a collection part 7, which is connected with the arc-shaped shell 63 through a transfer channel 8. The transfer channel 8 is designed in a trumpet shape at the communication part with the arc-shaped shell 63, so as to facilitate the slag to enter into the transfer channel 8. As a further limitation in the application, the collection part 7 comprises a fixed shell 71 fixedly installed on the side wall of the steel support 6, a placing chamber 72 located inside the fixed shell 71 and capable of being pulled out upward, and a detachable frame 73 fixedly installed on the bottom of the placing chamber 72. The slag in the arc-shaped shell 63 is transferred into the fixed shell 71 through the transfer channel 8. A through hole 74 is formed on one side of the placing chamber 72, and the slag in the transfer channel 8 enters into the placing chamber 72 through the through hole 74. The arc-shaped shell 63, the transfer channel 8, the fixed shell 71 and the placing chamber 72 are all provided with filter holes 9 for intercepting the slag. A plurality of inclined plates 11 are fixedly installed in the placing chamber 72 and the arc-shaped shell 63, and an arc-shaped plate body 111 is further fixedly installed on the bottom of each inclined plate 11. The arc-shaped plate body 111 can effectively prevent the slag from flowing back.

[0041] Specifically, the workpiece falls into the salt bath pool 1 through the hook. Under normal circumstances, the plurality of stirring mechanisms 2 rotate in the salt bath pool 1. The rotation of the stirring mechanisms 2 can ensure that the molten salt is uniformly distributed, avoid local overheating or overcooling, thereby improving the uniformity and efficiency of heating, and promoting heat exchange between the salt bath and the workpiece, so that the workpiece is heated more uniformly. The slag in the salt bath pool 1 will pass through the honeycomb-shaped plate frame 12 under the action of gravity, and use the inclined channel 13 of the honeycomb-shaped plate frame 12 to accelerate the sinking of the slag. At the same time, the motor unit 4 is started at regular time, and the steel shaft 5 rotates slowly at the bottom of the salt bath pool 1 under the transmission of the magnetic coupling technology. When the steel shaft 5 rotates slowly, the steel support 6 on the steel shaft 5 rotates synchronously, so that the steel support 6 drives the arc-shaped shell 63 to perform circular motion. The rack 61 on the steel support 6 also drives the long spiral blade 64 to perform circular motion through the mounting part 62. During the circular motion of the long spiral blade 64, the salt bath liquid acts on the surface of the long spiral blade 64, so that the long spiral blade 64 rotates in the arc-shaped shell 63 to capture the slag near the long spiral blade 64. In combination with the drawings, Figure 3 -attached Figure 6As shown, for the convenience of narration, it is assumed that the rotation of the steel shaft 5 is counterclockwise, and then the slag on the movement track will be captured by the long spiral blade 64 when the long spiral blade 64 rotates counterclockwise, and under the action of the rotation of the long spiral blade 64, the slag is thrown into the arc-shaped housing 63. Due to the circular motion of the long spiral blade 64, the slag flows into the arc-shaped housing 63 under the action of the salt bath liquid, and the rotation of the long spiral blade 64 plays a pushing role, so that the slag flows to the bottom of the arc-shaped housing 63 under the coupling action of the centrifugal force and the gravity, and finally enters the transfer channel 8. In this process, the inclined plate 11 in the arc-shaped housing 63 and the arc-shaped plate body 111 at the bottom thereof can effectively prevent the backflow of the slag in the arc-shaped housing 63, reduce the influence of the long spiral blade 64 on the slag already in the arc-shaped housing 63, and the end of the transfer channel 8 in a trumpet shape can effectively promote the slag to enter the transfer channel 8, and rely on the flow of the salt bath liquid to make the slag enter the fixed housing 71 along the transfer channel 8, and the slag entering the fixed housing 71 finally enters the placement chamber 72 through the through hole 74. Combined with the drawings Figure 8 As shown, the slag entering the placement chamber 72 will be deposited in the detachable frame 73 under the action of gravity, but when the workpiece enters the salt bath pool 1 and is located above the honeycomb plate frame 12, the liquid in the salt bath pool 1 is easy to appear local disturbance condition, and the inclined plate 11 in the placement chamber 72 and the arc-shaped plate body 111 at the bottom thereof can effectively avoid the backflow condition of the slag caused by local disturbance. It should be noted that the rotation of the steel shaft 5 driven by the motor unit 4 is a whole number of revolutions, combined with the drawings Figure 4 As shown, in the initial state, the placement chamber 72 is close to the side wall of the salt bath pool 1, when the staff needs to clean the slag in the placement chamber 72, wear protective clothing, use a fishing hook or other fishing tool above the salt bath pool 1 to take out the placement chamber 72 from the bottom of the salt bath pool 1. The placement chamber 72 has a hanging position for the fishing hook at the top, after the placement chamber 72 is taken out, the detachable frame 73 at the bottom can be separated by removing the bolts to clean the slag on the detachable frame 73.

[0042] Further, combined with the drawings Figure 9As shown, a plurality of connecting sleeves 10 are installed in parallel on each steel support 6 in the application, and a short helical blade 101 rotatingly connected with the connecting sleeve 10 is installed in each connecting sleeve 10, and the axis of the short helical blade 101 is perpendicular to the bottom of the salt bath pool 1, wherein a plurality of hammer bodies 102 are arranged between the short helical blades 101, and a spherical connecting part 103 is installed on the top of each hammer body 102, and each spherical connecting part 103 is connected with the steel support 6 through a mounting sleeve 104, and the spherical connecting part 103 is movably connected with the mounting sleeve 104, and a spring 105 connected with the spherical connecting part 103 is installed in the mounting sleeve 104, wherein a flow guide groove 106 is formed on the surface of the hammer body 102;

[0043] Specifically, combined with the accompanying drawings Figure 9 and the accompanying drawings Figure 10 As shown, when the steel support 6 performs circumferential motion, the connecting sleeve 10 thereon drives the short helical blade 101 to perform synchronous circumferential motion, in this process, the short helical blade 101 rotates, and the spherical connecting part 103 performs circumferential motion with the steel support 6, and because the hammer body 102 is movably connected with the mounting sleeve 104 through the spherical connecting part 103, the salt bath liquid then exerts force on the hammer body 102, so that the hammer body 102 is in an inclined state, and the hammer body 102 is located between the short helical blades 101, so that when the short helical blade 101 rotates, the liquid near the hammer body 102 makes it swing, and the stability of the swing of the hammer body 102 can be ensured under the action of the spring 105, because the short helical blade 101 and the hammer body 102 are close to the bottom of the salt bath pool 1, so in actual application, the rotation of the short helical blade 101 and the swing of the hammer body 102 help to stir the dregs deposited at the bottom of the salt bath pool 1, break its static deposition state, and the stirred dregs are more easily carried by the water flow to form a suspended state, and the swinging hammer body 102 can make the dregs in the suspended state move to the short helical blade 101 through the flow guide groove 106, so as to move to the movement track of the long helical blade 64 under the action of the water flow.

[0044] A use method of the isothermal quenching nodular cast iron salt bath device, specifically comprising the following steps:

[0045] S1: the workpiece falls into the salt bath pool 1, the stirring mechanism 2 rotates in the salt bath pool 1 to promote heat exchange between the salt bath and the workpiece, and the dregs in the salt bath pool 1 sink through the honeycomb plate frame 12 under the action of gravity, and the inclined channel 13 of the honeycomb plate frame 12 is used to accelerate the sinking of the dregs;

[0046] S2: the motor unit 4 is started in time, and the steel rotating shaft 5 is slowly rotated at the bottom of the salt bath tank 1 under the transmission of the magnetic coupling mechanism, the steel support 6 on the steel rotating shaft 5 rotates synchronously, the rack 61, the mounting part 62, the long spiral blade 64 and the arc-shaped shell 63 on the steel support 6 rotate synchronously, and the salt bath liquid acts on the surface of the long spiral blade 64 during the circular motion of the long spiral blade 64, so that the long spiral blade 64 rotates in the arc-shaped shell 63 to capture the slag near the long spiral blade 64 and throw the slag into the arc-shaped shell 63 under the action of the rotation of the long spiral blade 64, so that the slag flows to the bottom of the arc-shaped shell 63 under the coupling action of the centrifugal force and the gravity and finally enters the transfer channel 8 along with the flow of the salt bath liquid;

[0047] S3: the slag in the transfer channel 8 enters the fixed shell 71 depending on the flow of the salt bath liquid, and the slag entering the fixed shell 71 finally enters the storage chamber 72 through the through hole 74, and the slag entering the storage chamber 72 is deposited into the detachable frame 73 under the action of gravity, and the worker regularly takes out the storage chamber 72 and cleans the slag in it;

[0048] S4: when the steel support 6 rotates, the connecting sleeve 10 on the steel support 6 drives the short spiral blade 101 to rotate synchronously, in this process, the short spiral blade 101 rotates, and the liquid near the short spiral blade 101 is disturbed to make the hammer body 102 swing, and the rotation of the short spiral blade 101 and the swing of the hammer body 102 agitate the slag deposited at the bottom of the salt bath tank 1 to break the static deposition state of the slag;

[0049] S6: the workpiece leaves the salt bath tank 1, the rotating speed of the stirring mechanism 2 is reduced, and the motor unit 4 is stopped after rotating a certain number of turns.

[0050] It should be noted that, in this text, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0051] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. An austempered ductile iron salt bath apparatus, characterized by, The utility model provides a kind of salt bath tank and its stirring mechanism, including salt bath tank (1), multiple stirring mechanisms (2) being installed in both sides of salt bath tank (1), and the stirring end of stirring mechanism (2) is in-depth to salt bath tank (1) inside, motor housing (3) is fixedly installed on the bottom outer wall of salt bath tank (1), and motor unit (4) is fixedly installed in motor housing (3) inside, the inner wall of salt bath tank (1) is installed with the steel rotating shaft (5) being rotatably connected with its inner wall, and the output end between steel rotating shaft (5) and motor unit (4) is driven by magnetic coupling mechanism, wherein symmetrically installed with steel support (6) on steel rotating shaft (5), motor unit (4) controls the rotation of steel rotating shaft (5) using magnetic coupling mechanism, to drive steel support (6) to rotate at the bottom of salt bath tank (1), steel support (6) is also fixedly installed with rack (61) at both ends, and each rack (61) is fixedly installed with mounting portion (62) at both ends, wherein steel support (6) is also fixedly installed with arc shell (63), and long spiral blade (64) is provided in arc shell (63), and the both ends of long spiral blade (64) are rotatably connected with mounting portion (62) by penetrating the side wall of arc shell (63), during the circumferential motion of long spiral blade (64), the liquid in salt bath tank (1) acts on long spiral blade (64) and makes it rotate, and steel support (6) is also provided with collection part (7), and collection part (7) is connected between arc shell (63) by transfer channel (8);The pitch of long spiral blade (64) close to the inner wall of salt bath tank (1) is greater than the pitch of long spiral blade (64) close to steel rotating shaft (5);Each steel support (6) is parallelly installed with multiple connecting sleeves (10), and short spiral blade (101) is installed in each connecting sleeve (10) and rotatably connected therewith, and the axis of short spiral blade (101) is perpendicular to the bottom of salt bath tank (1), wherein multiple hammers (102) are provided between short spiral blade (101), and hammer (102) top is installed with spherical connecting part (103), each spherical connecting part (103) and steel support (6) are connected by mounting sleeve (104), and spherical connecting part (103) and mounting sleeve (104) are movably connected, spring (105) is installed in mounting sleeve (104) and connected with spherical connecting part (103), wherein guide groove (106) is formed in the surface of hammer (102).

2. The austemper compacted graphite iron salt bath apparatus of claim 1, wherein: Collection part (7) includes fixedly installed fixed housing (71) on the side wall of steel support (6), placed chamber (72) in fixed housing (71) and can be pulled up, and detachable frame (73) is fixed to the bottom of placed chamber (72) by bolt, and the dregs in arc shell (63) are transported into fixed housing (71) by transfer channel (8), and through-hole (74) is formed in one side of placed chamber (72), and the dregs in transfer channel (8) enter placed chamber (72) through through-hole (74).

3. The austemper compacted graphite iron salt bath apparatus of claim 2, wherein: The arc-shaped shell (63) and the long spiral blade (64) are arranged in a downward inclined manner from the steel rotating shaft (5) to the pool wall in the salt bath pool (1), and the inclination angle of the long spiral blade (64) is 25°-35°, so that the blade working surface forms a centrifugal force and gravity coupling effect when the long spiral blade (64) rotates, guiding the slag to slide to the outside of the blade and fall into the arc-shaped shell (63).

4. The austemper compacted graphite iron salt bath apparatus of claim 3, wherein: The arc-shaped shell (63), the transfer channel (8), the fixed shell (71) and the storage chamber (72) are all provided with filter holes (9) for intercepting the slag.

5. An austemper salt bath apparatus as claimed in claim 4, wherein: The transfer channel (8) is designed in a horn shape at the communication part with the arc-shaped shell (63), promoting the slag to enter the transfer channel (8).

6. An austemper salt bath apparatus as claimed in claim 5, wherein: The storage chamber (72) and the arc-shaped shell (63) are both fixedly provided with a plurality of inclined plates (11), and the bottom of each inclined plate (11) is further fixedly provided with an arc-shaped plate body (111), which prevents the backflow of the slag.

7. An austemper salt bath apparatus according to any one of claims 1 to 6, wherein: The salt bath pool (1) is further fixedly provided with a honeycomb-shaped plate frame (12), and the honeycomb-shaped plate frame (12) is further provided with an inclined channel (13), and the honeycomb-shaped plate frame (12) is located above the rotating shaft.

8. A method of using an austemper ductile iron salt bath apparatus, characterized by: The isothermal quenching salt bath device for nodular cast iron according to claim 7, specifically comprises the following steps: S1: the workpiece falls into the salt bath pool (1), the stirring mechanism (2) rotates in the salt bath pool (1), promoting heat exchange between the salt bath and the workpiece, and the slag in the salt bath pool (1) will pass through the honeycomb-shaped plate frame (12) under the action of gravity, and the inclined channel (13) of the honeycomb-shaped plate frame (12) is used to accelerate the sinking of the slag; S2: the motor unit (4) is started at a fixed time, and the steel rotating shaft (5) slowly rotates at the bottom of the salt bath pool (1) under the transmission of the magnetic coupling mechanism, the steel support (6) on the steel rotating shaft (5) rotates synchronously, the rack (61), the mounting part (62), the long spiral blade (64) and the arc-shaped shell (63) on the steel support (6) rotate synchronously, and the salt bath liquid acts on the surface of the long spiral blade (64) during the circumferential movement of the long spiral blade (64), so that the long spiral blade (64) rotates in the arc-shaped shell (63) to capture the slag near the long spiral blade (64), and the slag is thrown into the arc-shaped shell (63) under the action of the rotation of the long spiral blade (64), so that the slag flows to the bottom of the arc-shaped shell (63) under the coupling action of the centrifugal force and the gravity, and finally enters the transfer channel (8) along with the flow of the salt bath liquid; S3: the slag in the transfer channel (8) enters the fixed shell (71) relying on the flow of the salt bath liquid, and the slag finally enters the storage chamber (72) through the through hole (74), and the slag in the storage chamber (72) is deposited in the detachable frame (73) under the action of gravity, and the staff regularly takes out the storage chamber (72) and cleans the slag in it; S4: When the steel support (6) is in circumferential motion, the connecting sleeve (10) on it will drive the short helical blade (101) to move synchronously, in this process, the short helical blade (101) rotates, and the liquid near the short helical blade (101) is disturbed, so that the hammer body (102) swings, and the rotation of the short helical blade (101) and the swing of the hammer body (102) agitate the slag deposited at the bottom of the salt bath pool (1), breaking its static deposition state; S6: The workpiece leaves the salt bath pool (1), the rotating speed of the stirring mechanism (2) is reduced, and the motor unit (4) stops after rotating a certain number of complete circles.

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