Steel shot quenching furnace

Abstract

The steel shot quenching furnace comprises a fixing support and a furnace body rotationally connected with the fixing support, an inner cavity of the furnace body is rotationally connected with a furnace pipe, the inner cavity of the furnace body is provided with a plurality of heating elements located on the periphery of the furnace pipe, and the furnace pipe comprises a second rotating shaft rotationally connected with the furnace body and a first rotating shaft provided with a feeding and discharging port. A first driven wheel is arranged on the periphery of the second rotating shaft, a rotating component connected with the first driven wheel and used for driving the furnace pipe to rotate is fixedly arranged at the lower end of the furnace body, furnace body rotating shafts rotationally connected with the fixing support are arranged on the two opposite sides of the furnace body, and the fixing support is fixedly connected with inclined components connected with the furnace body rotating shafts. The fixed support is hinged to a plurality of lifting driving pieces hinged to the furnace body. According to the invention, local accumulation of steel shots in the quenching furnace can be prevented, uniform heating of the steel shots in the furnace pipe is ensured, the quenching effect of the steel shots is ensured, the dumping stroke and dumping speed of the furnace body can be effectively controlled, the speed of transferring the steel shots to the quenching tank is ensured, and the quenching quality of the steel shots is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of quenching furnaces, and in particular to a steel shot quenching furnace. Background Art

[0002] Steel shot, as an important metal spherical product, is a commonly used metal workpiece processing material. It has important applications in different fields. Whether it is metal surface polishing, cleaning, casting, abrasives and other fields, steel shot is needed. During the production and processing of steel shot, it needs to be quenched to improve the mechanical properties of steel shot. Quenching is a heat treatment process. The steel shot is heated to a quenching temperature above the critical point and maintained for a period of time. Then the steel shot is quickly cooled to change its internal structure, so as to obtain the required physical and mechanical properties. In addition, quenching the steel shot can improve the hardness and wear resistance of the steel shot. The steel shot quenching furnace is a furnace for heating the steel shot before quenching. The commonly used one is the continuous steel shot quenching furnace. The steel shot is heated and rotated in the furnace drum. After a period of time, the heated steel shot is quickly cooled to complete the quenching.

[0003] However, there are some problems with the continuous steel shot quenching furnace commonly used in the market: on the one hand, when the continuous steel shot quenching furnace heats and quenches the steel shot, since the steel shot is spherical and has a small volume, a large number of steel shots are prone to local accumulation when rotating with the furnace in the quenching furnace, resulting in uneven heating of the steel shot, which in turn causes serious oxidation on the surface of the steel shot, a decarburization layer greater than 100um, rust on the surface of the steel shot after quenching, dullness, uneven hardness, and poor quenching effect of the steel shot; on the other hand, after the steel shot is heated in the furnace, it needs to be poured into the quenching liquid tank. In the process of dumping the steel shot, a quenching crane (also known as a quenching crane) is needed to dump the steel shot in the furnace into the quenching tank. The dumping stroke and the speed at which the steel shot is transferred to the quenching tank are difficult to control. The furnace body may hit the quenching tank during dumping. If the steel shot transfer speed is slow, the quenching effect of the steel shot will also be affected. Summary of the invention

[0004] In order to solve the technical problems in the prior art that steel shots are prone to local accumulation in a quenching furnace, resulting in uneven heating of the steel shots, causing poor quenching effect of the steel shots, and that the tilting stroke of the furnace body and the speed at which the steel shots are transferred to the quenching tank are difficult to control, the furnace body may collide with the quenching tank, and if the steel shot transfer speed is slow, the quenching effect of the steel shots will also be affected, the present invention provides the following technical solutions.

[0005] The present invention provides a steel shot quenching furnace, comprising a fixed bracket and a furnace body provided with a furnace cover rotatably connected to the fixed bracket, the inner cavity of the furnace body being rotatably connected to a furnace core, the inner cavity of the furnace body being provided with a plurality of heating elements located at the periphery of the furnace core, the furnace core comprising a second rotating shaft rotatably connected to the furnace body and a first rotating shaft provided with a material inlet and outlet, a first driven wheel being provided at the periphery of the second rotating shaft, a rotating component connected to the first driven wheel and used for driving the furnace core to rotate being fixedly provided at the lower end of the furnace body, a furnace body rotating shaft rotatably connected to the fixed bracket being provided on opposite sides of the furnace body, the fixed bracket being fixedly connected with a tilting component connected to the furnace body rotating shaft, and the fixed bracket being hinged with a plurality of lifting driving components hinged with the furnace body.

[0006] As a further technical solution, the rotating component includes a first motor fixedly connected to the lower end of the furnace body and a first driving wheel connected to the output end of the first motor, and the first driving wheel is connected to the first driven wheel through a first synchronous belt.

[0007] As a further technical solution, the tilting component includes a second motor fixedly connected to the fixed bracket and a second driving wheel connected to the output end of the second motor, and the second driving wheel is connected to a second driven wheel arranged on the periphery of the furnace body shaft through a second synchronous belt.

[0008] As a further technical solution, a plurality of connection blocks are fixedly connected to the outer wall of the furnace body, and the lifting drive member is hinged to the connection blocks.

[0009] As a further technical solution, both the first rotating shaft and the second rotating shaft are fixedly provided with rotating wheels, and two supporting rotating wheels located below the rotating wheels are respectively provided on both sides of the furnace body.

[0010] As a further technical solution, a plurality of partition rings are provided in the axial direction of the inner wall of the furnace.

[0011] As a further technical solution, the inner wall of the furnace is provided with a plurality of groups of axially distributed flow members.

[0012] As a further technical solution, the diverter is an inclined guide plate evenly distributed along the radial direction of the furnace.

[0013] As a further technical solution, the diverter member is a diverter protrusion evenly distributed along the radial direction of the furnace.

[0014] As a further technical solution, the flow dividing member is a flow limiting column evenly distributed along the radial direction of the furnace, and a flow dividing groove is provided between adjacent flow limiting columns.

[0015] The beneficial effects of the present invention are as follows: the steel shot quenching furnace of the present invention has a furnace body driven by a rotating component to rotate axially, and a tilting component drives the furnace body to tilt and swing left and right at a uniform speed, the steel shot rotates and heats with the furnace body, the steel shot is evenly divided by a partition ring in the furnace body, and the steel shot in each partition is kept in a uniformly dispersed state by a diverter, so as to prevent the steel shot from being locally accumulated when the furnace body rotates in the quenching furnace, and ensure that the steel shot is evenly heated in the furnace body, the hardness of the steel shot after quenching is uniform, the decarburization layer is less than 5um, the surface is glossy, and there is no rust, so as to ensure the quenching effect of the steel shot. After the steel shot is heated in the furnace body, the furnace body is driven by a lifting drive to tilt and rotate, effectively controlling the dumping stroke and dumping speed of the furnace body, preventing it from hitting the quenching tank, and ensuring the speed of the steel shot being transferred to the quenching tank, thereby ensuring the quenching quality of the steel shot. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the steel shot quenching furnace of the present invention;

[0017] Figure 2 It is a structural schematic diagram of the steel shot quenching furnace of the present invention from another perspective;

[0018] Figure 3 It is a structural schematic diagram of the furnace body of the steel shot quenching furnace of the present invention;

[0019] Figure 4 It is a schematic cross-sectional view of a furnace of a steel shot quenching furnace of the present invention;

[0020] Figure 5 It is a schematic diagram of the connection of the guide plate of the steel shot quenching furnace of the present invention;

[0021] Figure 6 It is a connection schematic diagram of the diversion protrusion of the steel shot quenching furnace of the present invention;

[0022] Figure 7 It is a connection schematic diagram of the diverter trough of the steel shot quenching furnace of the present invention;

[0023] In the figure: 1-fixed bracket; 2-furnace body; 201-furnace cover; 202-supporting rotating wheel; 203-furnace body rotating shaft; 204-second driven wheel; 205-connecting block; 3-furnace hearth; 301-first rotating shaft; 302-second rotating shaft; 303-rotating wheel; 304-first driven wheel; 305-inlet and outlet; 4-rotating component; 401-first motor; 402-first driving wheel; 403-first synchronous belt; 5-lifting drive component; 6-tilting component; 601-second motor; 602-second driving wheel; 603-second synchronous belt; 7-heating element; 8-partitioning ring; 9-uniform flow component; 901-guidance plate; 902-diversion protrusion; 903-current limiting column; 904-diversion groove. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0025] In the description of the present invention, it should be understood that the terms "upper" and "lower" are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0026] like Figure 1 and Figure 3 As shown, a steel shot quenching furnace of the present invention comprises a fixed bracket 1 and a furnace body 2 provided with a furnace cover 201 which is rotatably connected to the fixed bracket 1. The fixed bracket 1 is fixed on the ground on one side of the quenching tank. The fixed bracket 1 is welded by section steel. The fixed bracket 1 has a bottom plate and two side plates, and the two side plates are used to connect the furnace body 2. Furnace body rotating shafts 203 are provided on opposite sides of the furnace body 2. The two furnace body rotating shafts 203 are rotatably connected to the upper ends of the two side plates of the fixed bracket 1. A furnace 3 is rotatably connected to the inner cavity of the furnace body 2. The inner cavity of the furnace body 2 is provided with a plurality of heating elements 7 located on the periphery of the furnace 3. The heating elements 7 are used to provide heating for the furnace 3 and heat the steel shots in the furnace 3. Of course, the heating element 7 is not limited to this structure, and other heating methods in the prior art can also be used to heat the furnace 3 and the steel shots in the furnace 3.

[0027] Among them, the outer shell frame of the furnace body 2 is welded and formed by steel, the seal of the furnace body 2 is made of aluminum silicate refractory fiber material, the furnace lining is made of high-quality full fiber structure, and a layer of rubber asbestos board is attached to the inner wall surface of the furnace body 2 to play a heat insulation role and protect the inner wall surface of the furnace body 2 from corrosion. The furnace 3 is made of 1Cr18Ni9Ti heat-resistant steel plate, and the heating element 7 is wound into a strip shape with 0Cr25AL5 alloy wire, which is sleeved on the insulating porcelain tube and fixed to the inner wall of the furnace body 2 through stainless round steel. The heating element 7 is evenly arranged around the furnace 3 to heat the steel shot in the furnace 3 evenly and sufficiently.

[0028] like Figure 2 and Figure 3As shown, in a preferred embodiment, the furnace 3 includes a second rotating shaft 302 rotatably connected to the furnace body 2 and a first rotating shaft 301 provided with a material inlet and outlet 305, and the first rotating shaft 301 and the second rotating shaft 302 are respectively rotatably connected to the furnace body 2. Specifically, the first rotating shaft 301 and the second rotating shaft 302 are both fixedly provided with a rotating wheel 303, and two supporting rotating wheels 202 located below the rotating wheel 303 are respectively provided on the outer walls of both sides of the furnace body 2, and the two supporting rotating wheels 202 are rotatably connected to the furnace body 2, so that the rotating wheel 303 can rotate on the upper part of the two supporting rotating wheels 202, thereby driving the furnace 3 and the furnace body 2 to rotate.

[0029] In a preferred embodiment, a first driven wheel 304 is provided on the outer periphery of the second rotating shaft 302, and a rotating component 4 connected to the first driven wheel 304 for driving the furnace 3 to rotate is fixedly provided at the lower end of the furnace body 2, and the second rotating shaft 302 is driven by the rotating component 4, so that the furnace 3 rotates relative to the furnace body 2, and then the steel shot is rotated and heated in the furnace 3. The rotating component 4 includes a first motor 401 fixedly connected to the lower end of the furnace body 2, the first motor 401 is a reduction motor, and the output end of the first motor 401 is connected to the first driving wheel 402, and the first driving wheel 402 is connected to the first driven wheel 304 through a first synchronous belt 403, so that when the first motor 401 drives the first driving wheel 402 to rotate, the first synchronous belt 403 drives the first driven wheel 304 and the second rotating shaft 302 to rotate, so that the furnace 3 rotates relative to the furnace body 2.

[0030] In a preferred embodiment, furnace body rotating shafts 203 are provided on opposite sides of the furnace body 2, and the two furnace body rotating shafts 203 are rotatably connected to the fixed bracket 1. The fixed bracket 1 is fixedly connected with a tilting component 6 connected to the furnace body rotating shaft 203, and the tilting component 6 drives the furnace body 2 to tilt and rotate left and right. The rotating component 4 is fixed at the lower end of the furnace body 2, so the tilting component 6 drives the steel shot in the furnace 3 to tilt and rotate left and right, and cooperates with the rotating component 4 to rotate the furnace 3, so that the steel shot rotates in multiple directions in the furnace 3, ensuring that the steel shot is evenly heated in the furnace 3, preventing the steel shot from being locally accumulated when the furnace 3 rotates in the quenching furnace, and ensuring the quenching effect of the steel shot.

[0031] The tilting component 6 includes a second motor 601 fixedly connected to the fixed bracket 1, the second motor 601 is a reduction motor, and the output end of the second motor 601 is connected to a second driving wheel 602, and the second driving wheel 602 is connected to a second driven wheel 204 arranged on the periphery of the furnace body rotating shaft 203 through a second synchronous belt 603. Therefore, when the second motor 601 drives the second driving wheel 602 to rotate, the second synchronous belt 603 drives the second driven wheel 204 and the furnace body rotating shaft 203 to rotate, thereby causing the furnace body 2 to rotate at a uniform speed relative to the fixed bracket 1.

[0032] In a preferred embodiment, the fixed support 1 is hinged with a plurality of lifting drive members 5 hinged with the furnace body 1. The lifting drive member 5 can be a hydraulic push rod or an electric push rod, which is not particularly limited in the present invention. The lifting drive member 5 can be used to support the stability of the furnace body 2, and can also drive the furnace body 2 to tilt, so as to dump the steel shot after heating into the quenching tank. Specifically, the outer wall of the furnace body 2 is fixedly connected with a plurality of connecting blocks 205, the upper end of the lifting drive member 5 is hinged to the connecting block 205, and the lower end of the lifting drive member 5 is hinged with the fixed support 1. In this embodiment, there are four lifting drive members 5, which are located around the furnace body 2. The two lifting drive members 5 close to the quenching tank are lowered, and the two lifting drive members 5 away from the quenching tank are raised. The furnace body 2 can be tilted, so that the steel shot in the furnace 3 can be quickly dumped into the quenching tank, so as to ensure that the transfer time of the steel shot is fast and adjustable, and the heating time of the steel shot is consistent, thereby ensuring the quenching effect of the steel shot.

[0033] like Figure 4 As shown, in a preferred embodiment, a plurality of partition rings 8 are provided in the axial direction of the inner wall of the furnace 3. The partition rings 8 and the furnace 3 are made of the same material. They can be integrally formed with the furnace 3 or welded to the inner wall of the furnace 3. The partition rings 8 are annular structures with a certain width. Multiple partition rings 8 can axially divide the inner wall of the furnace 3 into multiple heating areas. The number of steel shots loaded in each heating area is similar, ensuring uniform heating of the steel shots. The width of the partition rings 8 can be larger. In this case, the steel shots in each heating area are only heated by rotation in this area; the width of the partition rings 8 can also be smaller. In this case, in addition to rotating and heating in this area, the steel shots in each heating area can also be rolled and heated in adjacent heating areas driven by the tilting component 6. Regardless of the width of the partition rings 8, uniform heating of the steel shots in the furnace 3 can be ensured.

[0034] like Figure 5 As shown, in a preferred embodiment, the inner wall of the furnace 3 is provided with a plurality of groups of axially distributed diverters 9, and the diverters 9 and the furnace 3 are made of the same material to ensure their heat resistance and thermal conductivity. That is, after the diverters 9 are evenly distributed in the furnace 3 in the radial direction into a group, each group of diverters 9 is evenly distributed along the axial direction of the furnace 3, so that each heating area is provided with a diverter 9, and the diverter 9 can further promote the uniform dispersion of the steel shot in each heating area, so that the steel shot is evenly heated in the furnace 3.

[0035] In a preferred embodiment, the flow divider 9 is an inclined guide plate 901 evenly distributed along the radial direction of the furnace 3. The guide plate 901 is a rectangular plate structure, and its corners are rounded to prevent wear on the steel shot. The inclined guide plate 901 can make the steel shot in a single heating area more evenly distributed and more dispersed, ensuring uniform heating of the steel shot in the furnace 3.

[0036] like Figure 6As shown, in a preferred embodiment, the diverter member 9 is a plurality of rows of diverter protrusions 902 uniformly distributed radially along the furnace 3, and the diverter protrusions 902 are semi-cylindrical structures or hemispherical shapes. Multiple diverter protrusions 902 are uniformly arranged or uniformly staggered, which can make the steel shots more dispersed when rotating in each heating area, thereby ensuring uniform heating of the steel shots in the furnace 3.

[0037] like Figure 7 As shown, in a preferred embodiment, the diverter 9 is a flow-limiting column 903 uniformly distributed along the radial direction of the furnace 3, and a diverter groove 904 is provided between adjacent flow-limiting columns 903. The flow-limiting columns 903 cooperate with the diverter groove 904 to enable the steel shots in each heating area to rotate and heat mainly in the heating area, thereby reducing the possibility of the steel shots rotating to other heating areas, and also ensuring uniform heating of the steel shots in the furnace 3.

[0038] The mechanical transmission parts of the steel shot quenching furnace of the present invention adopt interlocking control, and the mechanical control system has an audible and visual alarm function. The temperature control system adopts PID zero-crossing triggering thyristor, intelligent meter temperature control, and a multi-point automatic recorder is used to record the temperature and over-temperature alarm dual control to ensure that the steel shot does not overheat. The temperature controller is also provided with a communication port, which can communicate with the central control computer. The temperature control value, insulation time and other parameters of the process are uniformly programmed and managed by the central control computer. The above-mentioned mechanical control system and temperature control system adopt the existing technology, which will not be described in detail.

[0039] When the present invention is in use, steel shots are added into the furnace 3 from the inlet and outlet port 305, and the inlet and outlet port 305 is closed; the rotating component 4 drives the furnace 3 to rotate axially, the lifting drive component 5 releases pressure, and the tilting component 6 drives the furnace 3 to tilt and swing left and right at a uniform speed to ensure that the steel shots in the furnace 3 are evenly heated; after the furnace 3 is heated to a fixed temperature and maintained for a period of time, the tilting component 6 stops running, and the lifting drive component 5 drives the furnace body 2 to rotate and tilt 45 degrees to dump the steel shots into the quenching tank, and the steel shots are quickly cooled by cooling water pressurized by a water pump; after the steel shots are dumped, the furnace body 2 returns to a horizontal position, and then new steel shots are added for heating treatment.

[0040] The preferred specific implementation modes and embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above implementation modes and embodiments. Various changes or equivalent substitutions can be made within the knowledge scope of those skilled in the art without departing from the concept of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments that fall within the scope of the claims of this application belong to the scope of protection of the present invention.

Claims

1. A steel shot quenching furnace, comprising a fixed support (1) and a furnace body (2) rotatably connected to the fixed support (1) and provided with a furnace cover (201), the inner cavity of the furnace body (2) being rotatably connected to a furnace liner (3), the inner cavity of the furnace body (2) being provided with a plurality of heating elements (7) located at the periphery of the furnace liner (3), the furnace liner (3) comprising a second rotating shaft (302) rotatably connected to the furnace body (2) and a first rotating shaft (301) provided with a material inlet and outlet (305), characterized in that: A first driven wheel (304) is provided on the outer periphery of the second rotating shaft (302); a rotating component (4) connected to the first driven wheel (304) and used for driving the furnace (3) to rotate is fixedly provided at the lower end of the furnace body (2); furnace body rotating shafts (203) rotatably connected to the fixed bracket (1) are provided on opposite sides of the furnace body (2); the fixed bracket (1) is fixedly connected to a tilting component (6) connected to the furnace body rotating shaft (203); and the fixed bracket (1) is hingedly connected to a plurality of lifting drive components (5) hingedly connected to the furnace body (1).

2. The steel shot quenching furnace according to claim 1, characterized in that: The rotating component (4) comprises a first motor (401) fixedly connected to the lower end of the furnace body (2) and a first driving wheel (402) connected to the output end of the first motor (401); the first driving wheel (402) is connected to the first driven wheel (304) via a first synchronous belt (403).

3. The steel shot quenching furnace according to claim 1, characterized in that: The tilting component (6) comprises a second motor (601) fixedly connected to the fixed bracket (1) and a second driving wheel (602) connected to the output end of the second motor (601); the second driving wheel (602) is connected to a second driven wheel (204) arranged on the periphery of the furnace body rotating shaft (203) via a second synchronous belt (603).

4. The steel shot quenching furnace according to claim 1, characterized in that: The outer wall of the furnace body (2) is fixedly connected with a plurality of connection blocks (205), and the lifting drive member (5) is hinged to the connection blocks (205).

5. The steel shot quenching furnace according to claim 1, characterized in that: The first rotating shaft (301) and the second rotating shaft (302) are both fixedly provided with rotating wheels (303), and two supporting rotating wheels (202) located below the rotating wheels (303) are respectively provided on both sides of the furnace body (2).

6. The steel shot quenching furnace according to claim 1, characterized in that: A plurality of partition rings (8) are provided on the inner wall of the furnace (3) in the axial direction.

7. The steel shot quenching furnace according to claim 1 or 6, characterized in that: The inner wall of the furnace (3) is provided with a plurality of groups of flow members (9) distributed axially.

8. The steel shot quenching furnace according to claim 7, characterized in that: The flow dividing member (9) is an inclined flow guide plate (901) evenly distributed along the radial direction of the furnace (3).

9. The steel shot quenching furnace according to claim 7, characterized in that: The flow dividing member (9) is a flow dividing protrusion (902) evenly distributed along the radial direction of the furnace (3).

10. The steel shot quenching furnace according to claim 7, characterized in that: The flow dividing member (9) is a flow limiting column (903) evenly distributed along the radial direction of the furnace (3), and a flow dividing groove (904) is provided between adjacent flow limiting columns (903).

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