A continuous heat treatment equipment

Abstract

The present invention provides a continuous heat treatment device, which belongs to the field of heat treatment of metal parts. In particular, it relates to a device for continuous transmission heat treatment of small metal parts. It includes: a heat treatment body, which is a multi-layer arrangement and is provided with a heating channel inside to continuously heat the passing material, and the heat treatment body is arranged vertically; a cooling box is placed at the unloading end of the heat treatment body and is connected to the heat treatment body, and a cooling medium is arranged in the cooling box to cool after the heat treatment; a discharge transmission component is placed in the cooling box, and one end is correspondingly located below the unloading port of the heat treatment body, and the other end extends out of the cooling box to export the material; a material guide component is placed at the feeding end of the heat treatment body and is connected to the heat treatment body for material introduction; the material is continuously heated by the vertically arranged heat treatment body, and continuously heated and heat-insulated by falling conveying, and cooled by the cooling box arranged at the rear end.

Description

Technical Field

[0001] The invention provides a continuous heat treatment device, belonging to the field of heat treatment of metal parts, and particularly relates to a device for performing continuous transmission heat treatment on small metal parts. Background Art

[0002] At present, when processing metal parts, the cutting process is the main way to ensure dimensional accuracy. Due to different material properties, the material will be annealed before cutting to improve machinability. After processing, further heat treatment (quenching) is performed to improve the strength of the parts, such as screws, etc. When heat treating small parts, the small parts are usually stacked in a basket and transferred to a heat treatment furnace through the basket for heat treatment. Most of the existing heat treatment furnaces are horizontal, with one end for loading and the other end for unloading. A cold air zone is set at the unloading end, and then connected to a quenching tank. The overall continuity is poor, and insulation waiting is required in the heat treatment furnace. The stacking has poor temperature balance for small parts, which is easy to cause uneven heating and deformation.

[0003] Publication No. CN202415638U discloses a heat treatment continuous cooling device, including a conveyor belt driven by a transmission motor and horizontally arranged between an inlet and an outlet, and an outer cover is arranged on the upper part of the conveyor belt; a spray device, an axial flow fan, a water supply device, a heating device and a drying device are arranged in sequence on the conveying path of the conveyor belt; a water trough is arranged at the lower part of the conveyor belt, and a partition is arranged between the conveyor belt and the water trough. The above-mentioned heat treatment equipment also adopts a linear arrangement, and the overall space occupied is large.

[0004] Publication No. CN204455207U discloses a continuous heat treatment equipment for automatically adjusting the isothermal temperature of a graded isothermal quenching process, comprising a tunnel quenching kiln, a quenching pool, a tunnel tempering kiln and a PLC system; the tunnel quenching kiln comprises a pushing mechanism, a material basket, a quenching kiln body and a material turner; the quenching pool comprises an oil tank and a swing mechanism; the tunnel tempering kiln comprises a pushing mechanism, a material basket, a tempering kiln body and a material turner; the continuous heat treatment equipment also comprises an isothermal temperature automatic control system, the isothermal temperature automatic control system comprises a temperature measuring device and a temperature control unit, and the temperature measuring device is arranged between the quenching pool and the tunnel tempering kiln.

[0005] Publication No. CN204939538U discloses a vertical continuous heating and quenching production equipment for aluminum alloy strips, including a vertical heating furnace body, an aluminum plate input device for inputting the aluminum strips into the vertical heating furnace body, and an aluminum plate output device for leading the aluminum strips out of the vertical heating furnace body. A quenching pool is arranged below the vertical heating furnace body. A preheating furnace chamber, a heating furnace chamber and a uniform heating furnace chamber are arranged in the vertical heating furnace body from top to bottom. The aluminum strips introduced by the aluminum plate input device pass vertically from top to bottom through the interior of the vertical heating furnace body and are heated. The aluminum strips inside the vertical heating furnace body do not contact any object and vertically enter the quenching pool for quenching. An aluminum plate input device into the vertical heating furnace body and an aluminum plate output device for leading the aluminum plate strip out of the vertical heating furnace body, a quenching pool is arranged under the vertical heating furnace body, and a preheating furnace chamber, a heating furnace chamber and a uniform heating furnace chamber are arranged in the vertical heating furnace body from top to bottom. The aluminum plate strip introduced by the aluminum plate input device passes vertically through the vertical heating furnace body from top to bottom and is heated. The aluminum plate strip inside the vertical heating furnace body does not contact with any object, and vertically enters the quenching pool for quenching, and is continuously heated by the vertically arranged furnace body, and is quenched in conjunction with the quenching tank arranged at the bottom, but the internal thermal insulation effect is poor, and the structure of the aluminum plate preheating is indeed poor, and the heating uniformity of the aluminum plate is poor, and it is easy to deform. Summary of the invention

[0006] The present invention provides a continuous heat treatment device, which provides a heat treatment device that is fast, efficient, and space-saving by making the heat treatment machine body into a vertical pipe gallery structure, heating the material while it passes through the pipe gallery, and arranging a cooling box at the bottom for cooling output. The heat treatment device has a simple structure and is easy to use.

[0007] A continuous heat treatment device, comprising:

[0008] A heat treatment body, which is multi-layered and has a heating channel inside to continuously heat the material passing through, and the heat treatment body is vertically arranged;

[0009] The cooling box is placed at the unloading end of the heat treatment body and is connected to the heat treatment body. A cooling medium is arranged in the cooling box to cool the heat after the heat treatment.

[0010] The material discharging transmission component is placed in the cooling box, with one end correspondingly located below the material discharging port of the heat treatment body, and the other end extending out of the cooling box for discharging the material;

[0011] The material guide component is placed at the feed end of the heat treatment body and is connected to the heat treatment body for material introduction;

[0012] The material is introduced through the material guide assembly, transported and heated in the heat treatment machine, falls into the cooling box, and is transported and discharged by the material discharge transmission assembly. A spiral feed plate for spiral conveying of the material is provided in the heat treatment machine;

[0013] The outer layer of the heat treatment body is connected to the top of the cooling box through a connecting seat, and a flange plate for connecting with the inner layer of the heat treatment body is provided on the top of the cooling box. The material guide assembly is covered and placed on the top of the heat treatment body. The material guide assembly and the heat treatment body are fastened by flange connection. Insulating fillers are provided between the multiple layers of the heat treatment body. A hole groove for leading out the material discharging transmission assembly is provided on one side of the cooling box.

[0014] It also includes a tube group structure for circulating cooling of the cooling medium.

[0015] Preferably, the tube group structure is placed in the middle of the heat treatment machine body and is fixed by a mounting plate. The tube group structure includes an inner cooling tube, which starts from the material guide assembly and extends into the cooling box. A current collecting cover is arranged at the end of the inner cooling tube. The current collecting cover is arranged in a direction and is correspondingly arranged in the cooling box. A plurality of blanking holes are arranged on the mounting plate. A spiral feeding plate is arranged on the outer wall of the inner cooling tube. An inner circulation tube is arranged in the inner cooling tube. One end of the inner cooling tube extends into the cooling box and is suspended to the surface of the cooling medium. The other end passes through the inner cooling tube and the material guide assembly in sequence, and a sealing structure is arranged at the penetration position.

[0016] The inner circulation pipe is connected to the cooling medium return pipe;

[0017] Among them, a suction structure that can float up and down is provided at the end of the inner circulation pipe;

[0018] The spiral feed plate runs through the heat treatment machine body, and the pitch changes regularly, first remaining unchanged, then increasing to 1.5-2 times of the original screw connection, and then decreasing to the original pitch remaining unchanged.

[0019] Preferably, the cooling box includes an upper box body and a lower box body placed at the bottom of the upper box body, the upper box body is a rectangular box body, a liquid level sensor is arranged on one side, a slag discharge hole is arranged at the bottom of the lower box body, injection pipes are symmetrically arranged in the upper box body, a plurality of nozzles are arranged on the injection pipes, the ends of the injection pipes are connected to the cooling medium inlet pipe, the cooling medium inlet pipe and the return pipe form a circulation through a circulation device, and the circulation device includes a high-pressure pump for extracting the cooling medium, a filter component for separating foreign matter from the medium, and a cooling component for cooling the medium;

[0020] Among them, an anti-corrosion coating is provided inside the upper box body;

[0021] A hole groove is provided on one side of the upper box body, and the reflux frame body is installed in the hole groove position and corresponds to the upper box body. Multiple groups of support structures I are provided in the upper box body, and support structure II and a driving motor are provided on the reflux frame body. The transmission belt is correspondingly wound on the support structure I and the support structure II, and forms a power connection with the driving motor to perform drive transmission of the transmission belt, and the transmission belt extends to the bottom of the heat treatment body;

[0022] A plurality of groups of scraper strips are arranged on the transmission belt;

[0023] The scraper strips are evenly spaced and parallel to each other.

[0024] Preferably, the scraper strip is arranged in a V-shape and can be detachably placed on the transmission belt;

[0025] The support structure I comprises a first support shaft and supporting rollers, the two ends of the first support shaft are correspondingly placed inside the upper box body through bearing seats, and the supporting rollers are placed on the first support shaft and fit the inner surface of the transmission belt;

[0026] The support structure II includes a supporting roller group, both ends of which can be rotatably placed on a return frame, and a guide bending groove is arranged at the bottom of the return frame.

[0027] Preferably, the width of the support structure I is greater than that of the support structure II, and two groups of filter belts are provided on the support structure I, and the filter belts are symmetrically placed on both sides of the transmission belt.

[0028] Preferably, the heat treatment body comprises a heating channel for material transmission, a temperature sensor for detecting temperature, and an upper cover plate for rotating material distribution, the temperature sensor is embedded in the heating channel and extends into the heating channel, the upper cover plate is placed on the upper end of the heating channel, the lower end of the heating channel is sealed and connected through a connecting seat and a flange connection on the upper box body, the inner cooling pipe is centrally placed in the heating channel, and a spiral feeding plate is provided between the inner cooling pipe and the heating channel;

[0029] The heating channel comprises an outer cover shell and an inner cover shell of a double-layer structure, a heating wire group is arranged between the outer cover shell and the inner cover shell, the heating wire group is fixedly placed on the outer side wall of the inner cover shell, and a heat-insulating filler is arranged between the outer cover shell and the inner cover shell;

[0030] The outer shell includes a first shell and a second shell, the space between the first shell and the second shell is not less than 2 cm, and is filled with thermal insulation filler;

[0031] The inner cover shell includes an inner cover body for heating and transmission, and an inner introduction cover for material introduction. The lower end of the inner cover body is provided with an end cover, the outer edge of the end cover is connected and sealed with the end of the second outer shell, and the end cover is connected with the top of the upper box body;

[0032] Among them, there are two groups of heating wire groups, namely, the outer coil and the inner coil. The outer coil is fixed on the outer wall of the inner cover body, and a gap is reserved between the outer coil and the inner cover body. The inner coil is fixed on the outer wall of the inner cover body and is located outside the outer coil. Both the outer coil and the inner coil are spiral heating coils. The pitch of the middle part of the outer coil is greater than that of the two ends. The threaded connection of the inner coil is equal to the threaded connection of the middle part of the outer coil, and it is staggered with the middle part of the outer coil. The ends of the outer coil and the inner coil correspondingly pass through the outer cover shell.

[0033] Preferably, one end of the inner introduction cover is inserted into the inner cover body, and the other end is turned outward to form a disc-shaped structure, and the edge is turned up to the outer edge. The inner introduction cover disc-shaped structure is provided with a slope, and is provided with an annular stacking trough, and a plurality of channels connecting the stacking trough and the inner cover body;

[0034] The outer coil is provided with a disk-shaped structure spirally distributed area along the inner introduction cover.

[0035] Preferably, the guide hopper cover is placed on the upper cover plate, and a rotation gap is set between the guide hopper and the upper cover plate. The guide hopper and the heating channel are connected and tightened by a flange structure, and the connection is convenient for reserving a transmission window for driving the upper cover plate to rotate. A rotation motor is installed corresponding to the transmission window to drive the upper cover plate to rotate. A rotation mechanism is connected between the upper cover plate and the inner cooling pipe;

[0036] A material dropping channel is provided between the guide hopper and the inner cooling pipe, a plurality of material dropping holes are provided at the edge of the upper cover plate for material dropping, an annular storage cavity is provided between the upper cover plate and the heating channel, and an annular preheating area is provided on the guide hopper and the upper cover plate;

[0037] A heat-conducting cover is arranged at the lower end of the guide hopper, and the heat-conducting cover extends outward and is correspondingly covered on the upper cover plate. The heat-conducting cover is provided with a plurality of annular grooves and radial grooves connected to the annular grooves. Preheating plates are evenly distributed on the heat-conducting cover, and the preheating plates are covered on the annular grooves and the radial grooves. The preheating plates are electrically heated, and a temperature sensor is arranged in the heat-conducting cover.

[0038] Preferably, the upper cover plate comprises a cover plate body, a rotary mechanism disposed in the inner ring of the cover plate body and connected to the inner cooling pipe, an outer gear ring is provided on the outer side wall of the cover plate body to drive the upper cover plate to rotate, a plurality of guide plates are provided on the cover plate body, the guide plates are in an annular array, a material drop hole is correspondingly provided on one side of the guide plate, and a conical surface is provided on the bottom surface of the cover plate body to guide the material;

[0039] Among them, an annular groove is arranged in the cover plate body, and a heat-insulating filler is arranged in the annular groove, and is used for rotationally cooperating with the heat-conducting cover and the inner introduction cover.

[0040] Preferably, the suction structure provided at the end of the inner circulation pipe comprises a fixed pipe, a floating pipe slidingly provided along the fixed pipe, a floating suction head provided at the end of the floating pipe, the floating suction head is made of rubber, and a hollow sealed airbag is provided at the mouth, the fixed pipe is connected to the end of the inner circulation pipe, and a filter is provided at the mouth of the fixed pipe.

[0041] The present invention provides a continuous heat treatment equipment, which continuously heats the material through a vertically arranged heat treatment body, forms continuous heating and heat preservation through falling transportation, and cools the material through a cooling box arranged at the rear end. After cooling, the material is transported and exported through a conveyor belt to form a continuous material cooling arrangement, and two types of heating coils are provided. The temperature is controlled by cooperating with an internal spiral feeding plate to achieve different heating temperature settings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a three-dimensional structural diagram of a continuous heat treatment equipment of the present invention.

[0043] Figure 2 It is a side view of a continuous heat treatment equipment of the present invention.

[0044] Figure 3 It is a cross-sectional schematic diagram of a continuous heat treatment equipment of the present invention.

[0045] Figure 4 This is a three-dimensional exploded view of a continuous heat treatment device of the present invention.

[0046] Figure 5 It is a three-dimensional schematic diagram of a heating channel of a continuous heat treatment equipment of the present invention.

[0047] Figure 6 The present invention is a schematic cross-sectional view of a heating channel of a continuous heat treatment device.

[0048] Figure 7 The figure is a schematic diagram of the structure of the side wall of the heating channel of a continuous heat treatment device of the present invention.

[0049] Figure 8 The figure shows the position of a heating wire group of a continuous heat treatment equipment of the present invention.

[0050] Fig. 9 This is a three-dimensional structural diagram of a lifting frame of a continuous heat treatment equipment of the present invention.

[0051] Fig.10 The diagram is a schematic diagram of the assembly relationship of the edge of the upper cover plate of a continuous heat treatment equipment of the present invention.

[0052] Fig.11 This is a schematic structural diagram of an outer coil of a continuous heat treatment device of the present invention.

[0053] Fig.12It is a three-dimensional schematic diagram of the cooling box of the present invention.

[0054] Fig.13 It is a schematic diagram of the structure of the injection pipe in the upper box body of the present invention.

[0055] Fig.14 It is a three-dimensional exploded view of the cutting tool set of the present invention.

[0056] Fig.15 Schematic diagram of the structure of the transmission belt of the present invention.

[0057] Fig.16 It is a three-dimensional structural diagram of the guide hopper of the present invention.

[0058] Fig.17 It is a schematic diagram of the structure of the groove on the heat conductive cover of the present invention.

[0059] Fig.18 It is a schematic structural diagram of the end portion of the inner circulation pipe of the present invention.

[0060] Fig.19 It is a three-dimensional structural diagram of the inner cooling tube of the present invention.

[0061] Fig. 20 It is a three-dimensional structural diagram of the upper cover plate of the present invention.

[0062] Fig.21 It is a top view of the upper cover plate of the present invention.

[0063] In the attached figure:

[0064] 1. Cooling box;

[0065] 10. upper box body; 11. lower box body; 12. injection pipe; 13. first support shaft; 14. filter mesh belt; 15. support roller;

[0066] 2. Heat treatment of the machine body;

[0067] 20. Heating channel; 21. Connecting seat; 22. Temperature sensor; 23. Upper cover;

[0068] 201, outer cover shell; 202, heating wire group; 203, inner cover shell; 204, thermal insulation filler; 230, cover plate body; 231, outer gear ring; 232, guide plate; 234, blanking hole; 235, rotary mechanism;

[0069] 2011, first housing; 2012, second housing; 2021, outer coil; 2022, inner coil; 2031, inner housing body; 2032, inner introduction housing; 2033, end cover;

[0070] 3. Material guide assembly;

[0071] 30. Guide hopper; 31. Internal cooling pipe; 32. Internal circulation pipe; 33. Preheating plate; 34. Heat conducting cover; 35. Mounting plate; 36. Spiral feeding plate;

[0072] 321, fixed tube; 322, floating tube; 323, floating suction head; 341, annular groove; 342, radial groove;

[0073] 4. Discharging transmission components;

[0074] 40. reflux frame; 41. transmission belt; 42. driving motor; 43. supporting roller group; 44. scraper strip. DETAILED DESCRIPTION

[0075] The present invention is further described below in conjunction with the accompanying drawings.

[0076] A continuous heat treatment device, comprising:

[0077] A heat treatment body 2, which is multi-layered and has a heating channel 20 inside to continuously heat the material passing through. The heat treatment body 2 is vertically arranged;

[0078] The cooling box 1 is placed at the unloading end of the heat treatment machine body 2 and is connected to the heat treatment machine body 2. A cooling medium is provided in the cooling box 1 to perform cooling after the heat treatment.

[0079] The material discharging transmission component 4 is placed in the cooling box 1, with one end correspondingly located below the material discharging port of the heat treatment body 2, and the other end extending out of the cooling box 1 to discharge the material;

[0080] The material guide component 3 is placed at the feed end of the heat treatment body 2 and is connected to the heat treatment body 2 for material introduction;

[0081] The material is introduced through the material guide assembly 3, transported and heated in the heat treatment body 2, falls into the cooling box 1, and is transported and discharged by the material discharge transmission assembly 4. A spiral feed plate 36 for spiral conveying of the material is provided in the heat treatment body 2;

[0082] The outer layer of the heat treatment body 2 is connected to the top of the cooling box 1 through a connecting seat 21, and a flange plate for connecting to the inner layer of the heat treatment body 2 is provided on the top surface of the cooling box 1. The material guide component 3 is covered and placed on the top of the heat treatment body 2. The material guide component 3 and the heat treatment body 2 are fastened by a flange connection. Insulating fillers 204 are provided between the multiple layers of the heat treatment body 2. A hole groove for the discharge transmission component 4 to be discharged is provided on one side of the cooling box 1.

[0083] It also includes a tube group structure for circulating cooling of the cooling medium.

[0084] In an optional embodiment, the tube group structure is placed in the middle of the heat treatment body 2 and is fixed by a mounting plate 35. The tube group structure includes an inner cooling tube 31. The inner cooling tube 31 starts from the material guide assembly 3 and extends into the cooling box 1. A current collecting cover is provided at the end of the inner cooling tube 31. The current collecting cover is arranged in a direction and is correspondingly placed in the cooling box 1. A plurality of blanking holes are provided on the mounting plate 35. A spiral feeding plate 36 is provided on the outer wall of the inner cooling tube 31. An inner circulation tube 32 is provided in the inner cooling tube 31. One end of the inner cooling tube 31 extends into the cooling box 1 and is suspended to the surface of the cooling medium. The other end passes through the inner cooling tube 31 and the material guide assembly 3 in sequence, and a sealing structure is provided at the penetration position.

[0085] The inner circulation pipe 32 is connected to the cooling medium return pipe;

[0086] Among them, the end of the inner circulation pipe 32 is provided with a suction structure that can float up and down;

[0087] The spiral feed plate 36 penetrates the heat treatment machine body 2, and the pitch changes regularly, first remaining unchanged, then increasing to 1.5-2 times of the original screw connection, and then decreasing to remain unchanged.

[0088] It should be noted that by changing the pitch of the spiral feed plate 36, the transmission speed of small parts, such as nuts and screws, is adjusted, and the external heat treatment body 2 is adapted to be heated and kept warm. Further, the pitch setting of the spiral feed plate 36 can be adjusted according to the insulation time.

[0089] In an optional embodiment, the cooling box 1 includes an upper box body 10 and a lower box body 11 placed at the bottom of the upper box body 10, the upper box body 10 is a rectangular box body, a liquid level sensor is arranged on one side, a slag discharge hole is arranged at the bottom of the lower box body 11, an injection pipe 12 is symmetrically arranged in the upper box body 10, a plurality of nozzles are arranged on the injection pipe 12, the end of the injection pipe 12 is connected to the cooling medium inlet pipe, the cooling medium inlet pipe and the return pipe form a circulation through a circulation device, and the circulation device includes a high-pressure pump for extracting the cooling medium, a filter component for separating foreign matter from the medium, and a cooling component for cooling the medium;

[0090] Among them, an anti-corrosion coating is provided inside the upper box body 10 to protect the upper box body 10 and prevent corrosion and leakage of the quenching oil;

[0091] A hole groove is provided on one side of the upper box body 10, and the reflux frame 40 is installed at the hole groove position. The reflux frame 40 is used to collect the cooling medium on the conveyor belt 41, and guide it into the upper box body 10, and corresponds to the upper box body 10. Multiple groups of support structures I are provided in the upper box body 10, and the reflux frame 40 is provided with a support structure II and a drive motor 42. The transmission belt 41 is correspondingly wound on the support structure I and the support structure II, and forms a power connection with the drive motor 42 to drive the transmission of the transmission belt 41. The transmission belt 41 extends to the bottom of the heat treatment body 2;

[0092] The transmission belt 41 is provided with a plurality of scraper strips 44 for lifting small parts. The small parts are pulled and lifted by the scrapers, which improves stability and enables quantitative conveying.

[0093] The scraper strips 44 are distributed at equal intervals and are parallel to each other.

[0094] It should be noted that a plurality of drainage holes are provided on the transmission belt 41 , and the transmission belt 41 receives the small parts exported from the heat treatment body 2 , and transports them out of the upper box body 10 , thereby exporting the small parts.

[0095] In an optional embodiment, the scraper strip 44 is arranged in a V-shape and can be detachably placed on the transmission belt 41 to improve the stability of small parts during the lifting process;

[0096] The support structure I includes a first support shaft 13 and a support roller 15. The two ends of the first support shaft 13 are correspondingly placed inside the upper box body 10 through bearing seats. The support roller 15 is placed on the first support shaft 13 and fits the inner surface of the transmission belt 41.

[0097] The support structure II includes a supporting roller group 43 , both ends of which can be rotatably placed on the return frame 40 , and a guide bending groove is arranged at the bottom of the return frame 40 .

[0098] It should be noted that the support structure I and the support structure II are used to support the transmission belt 41, and the drive motor 42 drives the transmission belt 41 for transmission. The filter belt 14 arranged on the support structure I can transport the oxide layer detached by quenching to the lower box body 11.

[0099] In an optional embodiment, the width of the support structure I is greater than that of the support structure II, and two groups of filter belts 14 are provided on the support structure I. The filter belts 14 are symmetrically placed on both sides of the transmission belt 41.

[0100] In an optional embodiment, the heat treatment body 2 includes a heating channel 20 for material transmission, a temperature sensor 22 for detecting temperature, and an upper cover plate 23 for rotating material distribution. The temperature sensor 22 is embedded in the heating channel 20 and extends into the heating channel 20. The upper cover plate 23 is covered and placed on the upper end of the heating channel 20. The lower end of the heating channel 20 is sealed and connected through a connecting seat 21 and a flange connection on the upper box body 10. The inner cooling pipe 31 is centrally placed in the heating channel 20, and a spiral feeding plate 36 is provided between the inner cooling pipe 31 and the heating channel 20.

[0101] The heating channel 20 comprises an outer cover shell 201 and an inner cover shell 203 of a double-layer structure, a heating wire group 202 is arranged between the outer cover shell 201 and the inner cover shell 203, the heating wire group 202 is fixedly placed on the outer side wall of the inner cover shell 203, and a heat-insulating filler 204 is arranged between the outer cover shell 201 and the inner cover shell 203;

[0102] The outer shell 201 includes a first shell 2011 and a second shell 2012. The first shell 2011 and the second shell 2012 are spaced at least 2 cm apart and are filled with heat-insulating fillers 204.

[0103] The inner housing 203 includes an inner housing body 2031 for heating and transmission, and an inner introduction housing 2032 for material introduction. An end cover 2033 is provided at the lower end of 2031. The outer edge of the end cover 2033 is connected and sealed to the end of the second housing 2012. The end cover 2033 is connected to the top of the upper box 10.

[0104] Among them, the heating wire group 202 is provided with two groups, namely the outer coil 2021 and the inner coil 2022. The outer coil 2021 is fixedly placed on the outer wall of the inner cover body 2031, and a gap is reserved between the outer coil 2021 and the inner cover body 2031. The inner coil 2022 is fixedly placed on the outer wall of the inner cover body 2031 and is located on the outside of the outer coil 2021. The outer coil 2021 and the inner coil 2022 are both spiral heating coils. The pitch of the middle part of the outer coil 2021 is greater than that of the two ends. The inner coil 2022 is screwed equal to the middle part of the outer coil 2021, and is staggered with the middle part of the outer coil 2021. The ends of the outer coil 2021 and the inner coil 2022 pass through the outer cover shell 201 accordingly.

[0105] It should be noted that the two sets of coils are heated synchronously or separately to perform different temperature regulation and control.

[0106] In an optional embodiment, one end of the inner introduction cover 2032 is inserted into the inner cover body 2031, and the other end is turned outward to form a disc-shaped structure, and the edge is turned up to the outer edge. The disc-shaped structure of the inner introduction cover 2032 is provided with a slope, and is provided with an annular stacking trough, and a plurality of channels connecting the stacking trough and the inner cover body 2031;

[0107] The outer coil 2021 is provided with a disc-shaped spiral distribution area along the inner introduction cover 2032 .

[0108] In an optional embodiment, the guide hopper 30 is placed on the upper cover plate 23, and a rotation gap is set between the guide hopper 30 and the upper cover plate 23. The guide hopper 30 and the heating channel 20 are connected and tightened by a flange structure, and the connection is convenient for reserving a transmission window for driving the upper cover plate 23 to rotate. A rotary motor is installed corresponding to the transmission window to drive the upper cover plate 23 to rotate. A rotary mechanism 235 is connected between the upper cover plate 23 and the inner cooling pipe 31;

[0109] A material dropping channel is provided between the guide hopper 30 and the inner cooling pipe 31, and a plurality of material dropping holes 234 are provided at the edge of the upper cover plate 23 for material dropping. An annular storage cavity is provided between the upper cover plate 23 and the heating channel 20, and an annular preheating area is provided between the guide hopper 30 and the upper cover plate 23;

[0110] A heat-conducting cover 34 is provided at the lower end of the guide hopper 30. The heat-conducting cover 34 extends outward and is correspondingly covered on the upper cover plate 23. The heat-conducting cover 34 is provided with a plurality of annular grooves 341 and radial grooves 342 connected to the annular grooves 341. Preheating plates 33 are evenly distributed on the heat-conducting cover 34. The preheating plates 33 are covered on the annular grooves 341 and the radial grooves 342. The preheating plates 33 are electrically heated, and a temperature sensor 22 is provided in the heat-conducting cover 34.

[0111] It should be noted that the preheating plate 33 can preheat small parts entering through the guide hopper 30 to shorten the subsequent heating time. At the same time, the preheating area can form an adaptation of the heat treatment temperature curve for secondary heating. For example, the heat treatment process is first heated to 150°C and then heated to 380°C, wherein 150°C is achieved through the preheating plate 33 and 380°C is controlled by the heating wire group 202.

[0112] In an optional embodiment, the upper cover plate 23 includes a cover plate body 230, a rotary mechanism 235 disposed at the inner ring of the cover plate body 230 and connected to the inner cooling pipe 31, an outer gear ring 231 is provided on the outer side wall of the cover plate body 230 to drive the upper cover plate 23 to rotate, a plurality of guide plates 232 are provided on the cover plate body 230, the guide plates 232 are in an annular array, a material drop hole 234 is correspondingly provided on one side of the guide plate 232, and a conical surface is provided on the bottom surface of the cover plate body 230 to guide the material;

[0113] The cover body 230 is provided with an annular groove in which a heat-insulating filler 204 is provided for rotational cooperation with the heat-conducting cover 34 and the inner introduction cover 2032 .

[0114] In an optional embodiment, the suction structure arranged at the end of the inner circulation pipe 32 includes a fixed pipe 321, a floating pipe 322 slidingly arranged along the fixed pipe 321, a floating suction head 323 is arranged at the end of the floating pipe 322, the floating suction head 323 is made of rubber material, and a hollow sealed airbag is arranged at the mouth, the fixed pipe 321 is connected to the end of the inner circulation pipe 32, and a filter is arranged at the mouth of the fixed pipe 321.

[0115] It should be noted that the airbag is suspended on the surface of the cooling medium and floats along with the liquid level of the cooling medium, thereby collecting a clarified layer on the surface of the cooling medium, improving the circulation efficiency and achieving the purpose of continuous heat treatment.

[0116] Preparation: Connect the inner cooling pipe 31 and the exhaust fan, and connect the inner circulation pipe 32, the injection pipe 12 and the cooling medium circulation assembly to form a circulation;

[0117] Heat treatment work: Then the processed small-structured metal parts such as nuts and screw plugs are introduced through the guide hopper 30, and the materials are discharged through the interval between the guide hopper 30 and the inner cooling tube 31 to introduce the materials. The upper cover plate 23 is driven to rotate by the motor, and the small parts fall onto the upper surface of the upper cover plate 23. During the rotation, they move toward the edge. At the same time, the preheating plate 33 is preheated, and the small parts are guided by the guide plate 232 to fall into the heat treatment body 2 from the drop hole 234. The corresponding heating wire group 202 in the heat treatment body 2 is heated to control the internal temperature. The small parts are transmitted on the spiral feeding plate 36. The materials are continuously introduced and pushed to form transportation. The heated small parts finally fall into the lower box 10 and contact the cooling medium in the lower box 10 to form smoke. The internal cooling pipe 31 guides the smoke and collects it with the collecting cover. The collecting cover is also used as a uniform distribution structure for material discharge. After the small parts are cooled, foreign matter on the surface is circulated and flushed by the injection jet on the injection pipe 12 to separate the foreign matter, and then transmitted through the conveyor belt 41. The internal circulation pipe 32 guides the cooling medium by sucking the liquid surface, and performs filtering, cooling and injection cycles. The lower box 11 is used to remove foreign matter deposited on the bottom.

[0118] Furthermore, when no cooling medium is injected into the upper box 10, the injection pipe 12 can be used as an air flow introduction pipe to form air cooling of small parts;

[0119] Furthermore, the injection pipe 12 is not used, and air cooling is formed after the heat treatment, so as to achieve the purpose of continuous heat treatment of small parts.

[0120] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A continuous heat treatment device, characterized in that: include: A heat treatment body (2), the heat treatment body (2) is multi-layered and has a heating channel (20) disposed therein, and the heat treatment body (2) is disposed vertically; The cooling box (1) is placed at the unloading end of the heat treatment machine body (2) and is connected to the heat treatment machine body (2). A cooling medium is provided in the cooling box (1); The material discharging transmission component (4) is placed in the cooling box (1), with one end correspondingly located below the material discharging port of the heat treatment machine body (2) and the other end extending out of the cooling box (1); The material guide component (3) is placed at the feed end of the heat treatment body (2) and is connected to the heat treatment body (2) for material introduction; The outer layer of the heat treatment body (2) is connected to the top of the cooling box (1) via a connecting seat (21); the top surface of the cooling box (1) is provided with a flange plate for connecting to the inner layer of the heat treatment body (2); the material guide component (3) is covered and placed on the top of the heat treatment body (2); the material guide component (3) and the heat treatment body (2) are fastened via a flange connection; thermal insulation fillers (204) are provided between the multiple layers of the heat treatment body (2); and a hole groove for guiding the material discharging transmission component (4) is provided on one side of the cooling box (1); Among them, it also includes a tube group structure for circulating cooling of the cooling medium; The tube group structure is placed in the middle of the heat treatment machine body (2) and is fixedly installed by a mounting plate (35). The tube group structure comprises an inner cooling tube (31). The inner cooling tube (31) starts from the material guide assembly (3) and extends into the cooling box (1). A current collecting cover is arranged at the end of the inner cooling tube (31). The current collecting cover is arranged in a direction and is correspondingly arranged in the cooling box (1). A plurality of blanking holes are arranged on the mounting plate (35). A spiral feeding plate (36) is arranged on the outer wall of the inner cooling tube (31). An inner circulation tube (32) is arranged in the inner cooling tube (31). One end of the inner cooling tube (31) extends into the cooling box (1) and is suspended on the surface of the cooling medium. The other end passes through the inner cooling tube (31) and the material guide assembly (3) in sequence, and a sealing structure is arranged at the penetration position. The inner circulation pipe (32) is connected to the cooling medium return pipe; Wherein, a suction structure capable of floating up and down is provided at the end of the inner circulation pipe (32); The spiral feed plate (36) penetrates the heat treatment machine body (2), and the pitch of the screw changes regularly, first remaining constant, then increasing to 1.5-2 times the original screw pitch, and then decreasing to the original pitch remaining constant; The cooling box (1) comprises an upper box body (10) and a lower box body (11) disposed at the bottom of the upper box body (10); the upper box body (10) is a rectangular box body, one side of which is provided with a liquid level sensor; the bottom of the lower box body (11) is provided with a slag discharge hole; injection pipes (12) are symmetrically arranged in the upper box body (10); a plurality of nozzles are arranged on the injection pipes (12); the ends of the injection pipes (12) are connected to a cooling medium inlet pipe; the cooling medium inlet pipe and the return pipe are circulated through a circulation device; the circulation device comprises a high-pressure pump for extracting cooling medium, a filter component for separating foreign matter from the medium, and a cooling component for cooling the medium; Wherein, an anti-corrosion coating is provided inside the upper box body (10); A hole groove is provided on one side of the upper box body (10), and the reflux frame (40) is installed at the position of the hole groove and corresponds to the upper box body (10). A plurality of support structures I are provided in the upper box body (10), and a support structure II and a drive motor (42) are provided on the reflux frame (40). A transmission belt (41) is correspondingly wound around the support structure I and the support structure II and forms a power connection with the drive motor (42), and the transmission belt (41) extends to the bottom of the heat treatment machine body (2); A plurality of scraper strips (44) are arranged on the transmission belt (41); wherein the scraper strips (44) are equidistantly distributed and parallel to each other; The scraper strip (44) is arranged in a V-shape and can be detachably placed on the transmission belt (41); The support structure I comprises a first support shaft (13) and a support roller (15); the two ends of the first support shaft (13) are correspondingly placed inside the upper box body (10) through bearing seats; the support roller (15) is placed on the first support shaft (13) and is in contact with the inner surface of the transmission belt (41); The support structure II comprises a supporting roller group (43), the two ends of which are rotatably placed on the return frame (40), and a guide bending groove is provided at the bottom of the return frame (40); The width of the support structure I is greater than that of the support structure II, and two groups of filter mesh belts (14) are arranged on the support structure I, and the filter mesh belts (14) are symmetrically placed on both sides of the transmission belt (41); The heat treatment body (2) comprises a heating channel (20) for material transmission, a temperature sensor (22) for detecting temperature, and an upper cover plate (23) for rotating and distributing materials. The temperature sensor (22) is embedded in the heating channel (20) and extends into the heating channel (20). The upper cover plate (23) covers the upper end of the heating channel (20). The lower end of the heating channel (20) is sealed and connected via a connecting seat (21) and a flange connection on the upper box body (10). The inner cooling pipe (31) is centrally placed in the heating channel (20), and a spiral feeding plate (36) is provided between the inner cooling pipe (31) and the heating channel (20). The heating channel (20) comprises an outer cover shell (201) and an inner cover shell (203) of a double-layer structure; a heating wire group (202) is arranged between the outer cover shell (201) and the inner cover shell (203); the heating wire group (202) is fixedly placed on the outer side wall of the inner cover shell (203); and a heat-insulating filler (204) is arranged between the outer cover shell (201) and the inner cover shell (203); The outer shell (201) comprises a first shell (2011) and a second shell (2012); the interval between the first shell (2011) and the second shell (2012) is not less than 2 cm, and is filled with thermal insulation filler (204); The inner cover shell (203) comprises an inner cover body (2031) for heating and transmission, and an inner introduction cover (2032) for material introduction; an end cover (2033) is provided at the lower end of the inner cover body (2031); an outer edge of the end cover (2033) is connected and sealed to an end of the second outer shell (2012); and the end cover (2033) is connected to the top of the upper box body (10); The heating wire group (202) is provided with two groups, namely an outer coil (2021) and an inner coil (2022); the outer coil (2021) is fixedly placed on the outer wall of the inner cover body (2031) and a gap is reserved between the outer coil (2021) and the inner cover body (2031); the inner coil (2022) is fixedly placed on the outer wall of the inner cover body (2031) and is located outside the outer coil (2021); the outer coil (2021) and the inner coil (2022) are both spiral heating coils; the pitch of the middle part of the outer coil (2021) is greater than that of the two ends; the inner coil (222) is screwed to the same extent as the middle part of the outer coil (2021) and is staggered with the middle part of the outer coil (2021); the ends of the outer coil (2021) and the inner coil (2022) correspondingly pass through the outer cover shell (201); One end of the inner introduction cover (2032) is inserted into the inner cover body (2031), and the other end is turned outward to form a disc-shaped structure, and the edge is turned up to the outer edge. The disc-shaped structure of the inner introduction cover (2032) is provided with a slope, and is provided with an annular material stacking trough, and a plurality of channels connecting the material stacking trough and the inner cover body (2031); Wherein, the outer coil (2021) is provided with a disc-shaped structure spirally distributed area along the inner introduction cover (2032); The upper cover plate (23) is covered with a guide hopper (30), a rotation gap is provided between the guide hopper (30) and the upper cover plate (23), the guide hopper (30) and the heating channel (20) are connected and tightened via a flange structure, and the connection is convenient for reserving a transmission window for driving the upper cover plate (23) to rotate, a rotation motor connected to the power of the upper cover plate (23) is installed corresponding to the transmission window, and a rotation mechanism (235) is connected between the upper cover plate (23) and the inner cooling pipe (31); A material dropping channel is provided between the material guide hopper (30) and the inner cooling tube (31), a plurality of material dropping holes (234) are provided at the edge of the upper cover plate (23), an annular storage cavity is provided between the upper cover plate (23) and the heating channel (20), and an annular preheating area is provided between the material guide hopper (30) and the upper cover plate (23); A heat-conducting cover (34) is provided at the lower end of the guide hopper (30). The heat-conducting cover (34) extends outward and is correspondingly covered on the upper cover plate (23). The heat-conducting cover (34) is provided with a plurality of annular grooves (341) and radial grooves (342) communicating with the annular grooves (341). Preheating plates (33) are evenly distributed on the heat-conducting cover (34). The preheating plates (33) are covered on the annular grooves (341) and the radial grooves (342). The preheating plates (33) are electrically heated. A temperature sensor (22) is provided in the heat-conducting cover (34).

2. A continuous heat treatment equipment according to claim 1, characterized in that: The upper cover plate (23) comprises a cover plate body (230), a slewing mechanism (235) disposed on the inner ring of the cover plate body (230) and connected to the inner cooling pipe (31), an outer gear ring (231) is provided on the outer wall of the cover plate body (230), a plurality of groups of guide plates (232) are provided on the cover plate body (230), the guide plates (232) are in an annular array, a blanking hole (234) is correspondingly provided on one side of the guide plate (232), and a conical surface is provided on the bottom surface of the cover plate body (230); An annular groove is provided in the cover plate body (230), and a heat-insulating filler (204) is provided in the annular groove, and is used for rotationally cooperating with the heat-conducting cover (34) and the inner introduction cover (2032).

3. A continuous heat treatment equipment according to claim 2, characterized in that: The suction structure arranged at the end of the inner circulation pipe (32) comprises a fixed pipe (321), a floating pipe (322) slidably arranged along the fixed pipe (321), a floating suction head (323) being arranged at the end of the floating pipe (322), the floating suction head (323) being made of rubber material, and a hollow sealed airbag being arranged at the mouth, the fixed pipe (321) being connected to the end of the inner circulation pipe (32), and a filter screen being arranged at the mouth of the fixed pipe (321).

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