CN210163490U

CN210163490U - Well type tempering furnace for heat treatment

Info

Publication number: CN210163490U
Application number: CN201920593444.9U
Authority: CN
Inventors: 曹阳
Original assignee: Nanjing Treasure Diamond Heat Treatment Co Ltd
Current assignee: Nanjing Treasure Diamond Heat Treatment Co Ltd
Priority date: 2019-04-28
Filing date: 2019-04-28
Publication date: 2020-03-20
Anticipated expiration: 2029-04-28

Abstract

The utility model discloses a well formula tempering furnace for thermal treatment, include: the auxiliary lifting mechanism, the tempering furnace main body mechanism and the power output mechanism; an auxiliary lifting mechanism is arranged above the tempering furnace main body mechanism; a power output mechanism is arranged below the tempering furnace main body mechanism; the tempering furnace main body mechanism comprises a furnace cover unit, a shell unit and a base support frame; a shell unit is arranged above the base support frame; a furnace cover unit is arranged above the shell unit; the furnace cover unit is positioned below the auxiliary lifting mechanism. The spiral heating pipe is adopted, so that parts in different areas of the tempering furnace are uniformly heated, and the quality of the tempered parts is improved; the spiral heating pipe is fixedly arranged on the upper end surface of the rotary platform through the supporting rod, and the rotary platform drives the spiral heating pipe to rotate, so that the temperature of each part in the tempering furnace is more uniform, and the defects of high rotating quality, low efficiency and easy damage to workpieces are overcome.

Description

Well type tempering furnace for heat treatment

Technical Field

The utility model belongs to the technical field of metal processing, in particular to well type tempering furnace for heat treatment.

Background

Tempering refers to a metal heat treatment process in which a quenched workpiece is reheated to a temperature lower than the lower critical temperature Ac1 (the starting temperature of pearlite transformation to austenite during heating), and then cooled in a medium such as air, water, oil, or the like after holding the temperature for a certain period of time. Or heating the quenched alloy workpiece to a proper temperature, preserving the heat for a plurality of times, and then slowly or rapidly cooling. Are generally used to reduce or eliminate internal stresses in quenched steel parts or to reduce their hardness and strength to improve their ductility or toughness. The quenched workpiece should be tempered in time, the required mechanical properties can be obtained through the matching of quenching and tempering, and the pit-type tempering furnace is a periodic operation type electric furnace for tempering common metal parts in air and quenching, annealing and aging heat treatment of light alloy parts such as aluminum alloy die castings, pistons, aluminum plates and the like.

The well type tempering furnace is one of the common equipments for heat treatment process. The pit-type tempering furnace is mainly used for tempering of quenching workpieces and heat treatment heating of nonferrous metals, and is used for tempering common metal parts in air and quenching, annealing and aging heat treatment of light alloy parts such as aluminum alloy die castings, pistons, aluminum plates and the like. Is particularly suitable for long workpieces needing to be vertically suspended and heated. The shaft furnace has good sealing performance, and workpieces can conveniently enter and exit the furnace. The pit furnace has simple structure, convenient operation and relatively less investment, thus being popular with domestic and foreign users.

At present, the following problems mainly exist:

1. the well type tempering furnace in the prior art usually carries out tempering treatment under normal pressure, and the treatment efficiency is low; in addition, the air in the existing tempering furnace is not circulated, so that the workpiece is easily heated unevenly, and the tempering quality of the workpiece is influenced;

2. the tempering furnace in the prior art has the advantages that parts in different areas in the furnace are uniformly heated, the processing results of the parts are greatly different when a large quantity of parts are processed, the effect is improved by adding a hot air circulating system, the hot air circulating is blocked by the parts after the large quantity of parts are loaded in the furnace, dead corners are generated in the furnace, the parts cannot be completely arranged uniformly, the different areas are heated non-uniformly, the temperature rising, maintaining and falling processes are obviously different, and the processing results of the parts are finally different; in addition, because the tempering furnace is in a sealed state, the pressure in the furnace body is easily overlarge due to long-time high temperature, the furnace body is difficult to open, and the tempering effect is influenced due to the continuous rise of the temperature under the high-pressure state;

3. in the use process of the existing well type tempering furnace, metal enters the tempering furnace at normal temperature, the temperature of the tempering furnace needs to be slowly increased to the temperature to be reached by tempering, and the tempering efficiency is slow;

4. in the use process of the existing pit-type tempering furnace, a furnace cover is connected with a lifting frame through a lifting chain, the lifting frame is connected with a lifting shaft, and the lifting shaft is connected with a screw rod lifter. When the bell need be opened, start the lead screw lift, the lead screw lift drives lift shaft and crane and rises to rise, and the crane drives the bell through the chain sling again and rises to rise, and the bell rises to the regulation height, and the handle on the rethread crane drives the bell and opens to one side direction, and the bell is opened to this kind of manual mode, needs two at least people to operate just can accomplish, and such mode is not only extravagant the manpower, and manipulation strength is great, still has certain danger.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects, the utility model aims to provide a well type tempering furnace for heat treatment, which adopts a spiral heating pipe to ensure that parts in different areas of the tempering furnace are heated uniformly, thereby improving the quality of the tempered parts; the spiral heating pipe is fixedly arranged on the upper end surface of the rotary platform through the supporting rod, and the rotary platform drives the spiral heating pipe to rotate, so that the temperature of each part in the tempering furnace is more uniform, and the defects of large rotating quality, low efficiency and easiness in workpiece damage of the workpiece are overcome; a hot air forced circulation system is arranged on the upper side of the tempering cavity, so that the air circulation in the tempering furnace is improved, and all parts are heated uniformly; the smoke exhaust pipe is provided with the pressure reducing rod, so that the pressure in the tempering furnace can be conveniently adjusted, the efficiency is improved, and the cover is conveniently opened; the preheating device is arranged to preheat the tempering furnace, so that the temperature of the placing frame in the tempering furnace is increased before the tempering furnace works, and after the temperature of the placing frame is increased and metal is placed on the placing frame, the temperature of the metal can be directly increased, the tempering efficiency can be increased, and meanwhile, energy used in tempering can be greatly saved; through setting up the supplementary lift structure for the convenient operation that uncaps is swift, has reduced intensity of labour greatly, has improved the operation security.

The technical scheme is as follows: in order to achieve the above object, the utility model provides a well type tempering furnace for heat treatment, include: the auxiliary lifting mechanism, the tempering furnace main body mechanism and the power output mechanism; an auxiliary lifting mechanism is arranged above the tempering furnace main body mechanism; a power output mechanism is arranged below the tempering furnace main body mechanism; the tempering furnace main body mechanism comprises a furnace cover unit, a shell unit and a base support frame; a shell unit is arranged above the base support frame; a furnace cover unit is arranged above the shell unit; the furnace cover unit is positioned below the auxiliary lifting mechanism.

The auxiliary lifting mechanism in the utility model comprises a suspension arm, a rotating handle, a roller bearing, a rotating shaft, a bearing seat, a threaded rod, a motor, a driving wheel and a first driven wheel; a fixed seat is arranged on the outer side of the shell unit; a shaft hole is formed above the fixed seat for inserting the lower end of the rotating shaft; a shaft hole is formed below the lifting arm for inserting the upper end of the rotating shaft; a bearing seat is arranged below the fixed seat; a roller bearing is arranged between the fixed seat and the suspension arm; a rotating handle is arranged on one side of the suspension arm, which is far away from the furnace cover unit; a motor is arranged above the suspension arm; two sides of the motor are respectively provided with a threaded rod; a driving wheel and a first driven wheel are arranged in the suspension arm; two sides of the driving wheel are respectively provided with a first driven wheel.

The utility model discloses in thereby supplementary hoist mechanism pass through the switch on the turning handle, thereby the starter motor rotates the rotation that drives the action wheel, action wheel and first driven gear intermeshing to drive first driven gear and rotate, thereby the internal tooth of first driven gear and second driven gear intermeshing drive second driven gear and rotate. The second driven gear is in threaded connection with the threaded rod, so that the threaded rod is driven to move upwards, the bottom of the threaded rod is connected with the furnace cover, the furnace cover is driven to move upwards, and when the furnace cover rises to a certain height, the furnace cover is opened through rotating the rotating handle. This supplementary promotion structure convenient operation has reduced intensity of labour greatly, has improved the operational safety nature.

The furnace cover unit in the utility model comprises a hot air forced circulation system motor, a motor fixing seat, a fan blade rotating shaft, fan blades, an auxiliary cover body, a hose joint, a pressure reducing rod, a hose and a smoke exhaust pipe; a motor fixing seat is arranged below the motor of the hot air forced circulation system; a fan blade rotating shaft is arranged below the motor fixing seat; a plurality of fan blades are arranged on the periphery of the bottom end of the fan blade rotating shaft; an auxiliary cover body is arranged on one side of the motor fixing seat, which is far away from the rotating handle; a hose is arranged above the auxiliary cover body; a pressure reducing rod is arranged above the hose; one end of the hose is fixed on the auxiliary cover body through a hose connector; the other end of the hose is connected with a smoke exhaust pipe.

The upper side of the tempering cavity is provided with a hot air forced circulation system, so that the air circulation in the tempering furnace is improved, and all parts are heated uniformly; the pressure reducing rod is arranged on the smoke exhaust pipe, so that the internal pressure of the tempering furnace can be conveniently adjusted, the efficiency is improved, and the cover is conveniently opened.

The shell unit in the utility model comprises a spiral heating pipe, a support rod, a tempering cylinder, a placing frame, a heat conducting rod, a heat conducting plate and a preheating device; supporting rods are arranged on the periphery and the bottom side of the tempering cylinder; a plurality of spiral heating pipes are arranged on the outer side of the rod wall of the supporting rod; a placing frame is arranged on the inner side of the tempering cylinder; a plurality of heat conducting rods are arranged below the placing rack; a heat conducting plate is arranged below the heat conducting rod; and a preheating device is arranged on one side of the spiral heating pipe, which is far away from the rotating handle.

The shell unit in the utility model adopts the spiral heating pipe, so that parts in different areas of the tempering furnace are heated uniformly, and the quality of the tempered parts is improved; the spiral heating pipe is fixedly arranged on the upper end surface of the rotary platform through the supporting rod, and the rotary platform drives the spiral heating pipe to rotate, so that the temperature of each part in the tempering furnace is more uniform, and the defects of large rotating mass, low efficiency and easy damage of workpieces of the workpieces are overcome

The power output mechanism in the utility model comprises a vertical bevel gear shaft, a vertical pipe, a horizontal bevel gear shaft, a supporting shaft bracket, a speed reducer, a variable frequency motor and a shaft bracket base; a vertical pipe is arranged below the vertical bevel gear shaft; a horizontal bevel gear shaft is arranged on one side of the vertical pipe; a reducer is arranged on one side of the horizontal bevel gear shaft, which is far away from the vertical pipe; a variable frequency motor is arranged on one side of the bevel gear shaft, far away from the speed reducer; a supporting shaft bracket is arranged below the shell unit; and a shaft bracket base is arranged below the supporting shaft bracket.

The preheating device in the utility model comprises an air inlet pipe, a guide pipe, a check valve, a heat conducting pipe, a control valve, a preheating box, a heat preservation layer, an inner container, a supporting plate and a supporting frame; the lower end of the air inlet pipe is connected with a preheating box; the inner wall of the preheating box is provided with a heat-insulating layer; the inner wall of the heat-insulating layer is wrapped with an inner container; the inner wall of the inner container is wrapped with a heat conduction pipe; a control valve is arranged in the heat conduction pipe; a supporting plate is arranged below the preheating box; and a support frame is arranged below the supporting plate.

The utility model discloses in preheating device can preheat the tempering furnace, make the tempering furnace before carrying out work, the inside rack temperature of tempering furnace risees, after the temperature of rack risees, after the rack is placed to the metal, the temperature of metal can directly rise, can increase the efficiency of tempering, simultaneously, used energy when also can be great sparingly tempering.

In the utility model, a second driven wheel is also arranged in the first driven wheel; the threaded rod penetrates through the wheel core of the second driven wheel.

The upper end of the heat conducting rod in the utility model is embedded into the placing frame; the lower end of the heat conducting rod is embedded into the heat conducting plate; each row of the heat conducting rods is fixed together through a fixing rod.

Above-mentioned technical scheme can find out, the utility model discloses following beneficial effect has:

1. by adopting the spiral heating pipe, parts in different areas of the tempering furnace are uniformly heated, and the quality of the tempered parts is improved; the spiral heating pipe is fixedly arranged on the upper end surface of the rotary platform through the supporting rod, and the rotary platform drives the spiral heating pipe to rotate, so that the temperature of each part in the tempering furnace is more uniform, and the defects of large rotating quality, low efficiency and easiness in workpiece damage of the workpiece are overcome;

2. a hot air forced circulation system is arranged on the upper side of the tempering cavity, so that the air circulation in the tempering furnace is improved, and all parts are heated uniformly; the smoke exhaust pipe is provided with the pressure reducing rod, so that the pressure in the tempering furnace can be conveniently adjusted, the efficiency is improved, and the cover is conveniently opened;

3. the preheating device is arranged to preheat the tempering furnace, so that the temperature of the placing frame in the tempering furnace is increased before the tempering furnace works, and after the temperature of the placing frame is increased and metal is placed on the placing frame, the temperature of the metal can be directly increased, the tempering efficiency can be increased, and meanwhile, energy used in tempering can be greatly saved;

4. through setting up the supplementary lift structure for the convenient operation that uncaps is swift, has reduced intensity of labour greatly, has improved the operation security.

Drawings

Fig. 1 is a schematic view of the overall structure of a well-type tempering furnace for heat treatment according to the present invention;

fig. 2 is a schematic view of the overall structure of the preheating device according to the present invention;

fig. 3 is a schematic view of the overall structure of the driving wheel, the first driven wheel, the second driven wheel and the threaded rod according to the present invention;

fig. 4 is a schematic view of the position structure of the heat conducting rod and the placing frame of the present invention.

In the figure: an auxiliary lifting mechanism-1, a suspension arm-11, a rotating handle-12, a roller bearing-13, a rotating shaft-14, a bearing seat-15, a threaded rod-16, a motor-17, a driving wheel-18, a first driven wheel-19, a second driven wheel-191, a tempering furnace main body mechanism-2, a furnace cover unit-21, a hot air forced circulation system motor-211, a motor fixing seat-212, a fan blade rotating shaft-213, a fan blade-214, an auxiliary cover body-215, a hose joint-216, a pressure reducing rod-217, a hose-218, a smoke exhaust pipe-219, a shell unit-22, a spiral heating pipe-221, a supporting rod-222, a tempering cylinder-223, a placing rack-224, a heat conducting rod-225, a heat conducting plate-226, a preheating device-227, An air inlet pipe-2271, a conduit-2272, a check valve-2273, a heat conducting pipe-2274, a control valve-2275, a preheating tank-2276, a heat insulating layer-2277, an inner container-2278, a supporting plate-2279, a supporting frame-2270, a base supporting frame-23, a power output mechanism-3, a vertical bevel gear shaft-31, a vertical pipe-32, a horizontal bevel gear shaft-33, a supporting shaft bracket-34, a speed reducer-35, a variable frequency motor-36 and a shaft bracket base-37.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example 1

A well type tempering furnace for heat treatment as shown in fig. 1, comprising: the device comprises an auxiliary lifting mechanism 1, a tempering furnace main body mechanism 2 and a power output mechanism 3; an auxiliary lifting mechanism 1 is arranged above the tempering furnace main body mechanism 2; a power output mechanism 3 is arranged below the tempering furnace main body mechanism 2; the tempering furnace main body mechanism 2 comprises a furnace cover unit 21, a shell unit 22 and a base support frame 23; a shell unit 22 is arranged above the base support frame 23; a furnace cover unit 21 is arranged above the shell unit 22; the furnace cover unit 21 is located below the auxiliary lifting mechanism 1.

Example 2

In addition, the auxiliary lifting mechanism 1 comprises a boom 11, a rotating handle 12, a roller bearing 13, a rotating shaft 14, a bearing seat 15, a threaded rod 16, a motor 17, a driving wheel 18 and a first driven wheel 19; a fixed seat is arranged on the outer side of the shell unit 22; a shaft hole is formed above the fixed seat for inserting the lower end of the rotating shaft 14; a shaft hole is formed below the suspension arm 11 for inserting the upper end of the rotating shaft 14; a bearing seat 15 is arranged below the fixed seat; a roller bearing 13 is arranged between the fixed seat and the suspension arm 11; a rotating handle 12 is arranged on one side of the suspension arm 11 far away from the furnace cover unit 21; a motor 17 is arranged above the suspension arm 11; two sides of the motor 17 are respectively provided with a threaded rod 16; a driving wheel 18 and a first driven wheel 19 are arranged inside the suspension arm 11; a first driven wheel 19 is arranged on each side of the driving wheel 18.

In addition, the furnace cover unit 21 includes a hot air forced circulation system motor 211, a motor fixing base 212, a fan blade rotating shaft 213, fan blades 214, an auxiliary cover body 215, a hose connector 216, a pressure reducing rod 217, a hose 218 and a smoke exhaust pipe 219; a motor fixing seat 212 is arranged below the hot air forced circulation system motor 211; a fan blade rotating shaft 213 is arranged below the motor fixing seat 212; a plurality of fan blades 214 are arranged around the bottom end of the fan blade rotating shaft 213; an auxiliary cover 215 is arranged on one side of the motor fixing seat 212 far away from the rotating handle 12; a hose 218 is arranged above the auxiliary cover body 215; a decompression rod 217 is arranged above the hose 218; one end of the hose 218 is fixed on the auxiliary cover body 215 through a hose connector 216; the other end of the hose 218 is connected with a smoke exhaust pipe 219.

Furthermore, the housing unit 22 comprises a spiral heating pipe 221, a support rod 222, a tempering cylinder 223, a placing frame 224, a heat conducting rod 225, a heat conducting plate 226 and a preheating device 227; supporting rods 222 are arranged on the periphery and the bottom side of the tempering cylinder 223; a plurality of spiral heating pipes 221 are arranged on the outer side of the rod wall of the supporting rod 222; a placing frame 224 is arranged on the inner side of the tempering cylinder 223; a plurality of heat conducting rods 225 are arranged below the placing frame 224; a heat conducting plate 226 is arranged below the heat conducting rod 225; the spiral heating pipe 221 is provided with a preheating device 227 at a side away from the rotating handle 12.

Further, the power output mechanism 3 comprises a vertical bevel gear shaft 31, a vertical pipe 32, a horizontal bevel gear shaft 33, a support shaft bracket 34, a speed reducer 35, a variable frequency motor 36 and a shaft bracket base 37; a vertical pipe 32 is arranged below the vertical bevel gear shaft 31; a horizontal bevel gear shaft 33 is arranged on one side of the vertical pipe 32; a reducer 35 is arranged on one side of the horizontal bevel gear shaft 33, which is far away from the vertical pipe 32; a variable frequency motor 36 is arranged on one side of the bevel gear shaft 33, far away from the speed reducer 35; a support shaft bracket 34 is arranged below the shell unit 22; a shaft bracket base 37 is arranged below the supporting shaft bracket 34.

In addition, as shown in fig. 2, the preheating device 227 includes an air inlet pipe 2271, a guide pipe 2272, a check valve 2273, a heat conductive pipe 2274, a control valve 2275, a preheating chamber 2276, an insulating layer 2277, an inner container 2278, a support plate 2279, and a support frame 2270; the lower end of the air inlet pipe 2271 is connected with a preheating tank 2276; the inner wall of the preheating box 2276 is provided with a heat preservation layer 2277; the inner wall of the heat-insulating layer 2277 is wrapped with an inner container 2278; the inner wall of the inner container 2278 is wrapped with a heat conducting pipe 2274; a control valve 2275 is arranged inside the heat conduction pipe 2274; a supporting plate 2279 is arranged below the preheating box 2276; a support frame 2270 is arranged below the supporting plate 2279.

Furthermore, as shown in fig. 3, a second driven wheel 191 is further disposed inside the first driven wheel 19; the threaded rod 16 is arranged at the wheel core of the second driven wheel 191 in a penetrating way.

As shown in fig. 4, the upper end of the heat conducting rod 225 is embedded in the placing frame 224; the lower end of the heat conduction rod 225 is embedded in the heat conduction plate 226; the heat conduction rods 225 are fixed together in each row by fixing rods.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications can be made without departing from the principles of the present invention, and these modifications should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a well formula tempering furnace for heat treatment which characterized in that: the method comprises the following steps: the auxiliary lifting mechanism (1), the tempering furnace main body mechanism (2) and the power output mechanism (3); an auxiliary lifting mechanism (1) is arranged above the tempering furnace main body mechanism (2); a power output mechanism (3) is arranged below the tempering furnace main body mechanism (2); the tempering furnace main body mechanism (2) comprises a furnace cover unit (21), a shell unit (22) and a base support frame (23); a shell unit (22) is arranged above the base support frame (23); a furnace cover unit (21) is arranged above the shell unit (22); the furnace cover unit (21) is positioned below the auxiliary lifting mechanism (1).

2. A well type tempering furnace for heat treatment according to claim 1, characterized in that: the auxiliary lifting mechanism (1) comprises a suspension arm (11), a rotating handle (12), a roller bearing (13), a rotating shaft (14), a bearing seat (15), a threaded rod (16), a motor (17), a driving wheel (18) and a first driven wheel (19); a fixed seat is arranged on the outer side of the shell unit (22); a shaft hole is formed above the fixed seat for inserting the lower end of the rotating shaft (14); a shaft hole is formed below the suspension arm (11) for the upper end of the rotating shaft (14) to be inserted; a bearing seat (15) is arranged below the fixed seat; a roller bearing (13) is arranged between the fixed seat and the suspension arm (11); a rotating handle (12) is arranged on one side of the suspension arm (11) far away from the furnace cover unit (21); a motor (17) is arranged above the suspension arm (11); two sides of the motor (17) are respectively provided with a threaded rod (16); a driving wheel (18) and a first driven wheel (19) are arranged in the suspension arm (11); two sides of the driving wheel (18) are respectively provided with a first driven wheel (19).

3. A well type tempering furnace for heat treatment according to claim 1, characterized in that: the furnace cover unit (21) comprises a hot air forced circulation system motor (211), a motor fixing seat (212), a fan blade rotating shaft (213), fan blades (214), an auxiliary cover body (215), a hose joint (216), a pressure reducing rod (217), a hose (218) and a smoke exhaust pipe (219); a motor fixing seat (212) is arranged below the hot air forced circulation system motor (211); a fan blade rotating shaft (213) is arranged below the motor fixing seat (212); a plurality of fan blades (214) are arranged on the periphery of the bottom end of the fan blade rotating shaft (213); an auxiliary cover body (215) is arranged on one side, away from the rotating handle (12), of the motor fixing seat (212); a hose (218) is arranged above the auxiliary cover body (215); a decompression rod (217) is arranged above the hose (218); one end of the hose (218) is fixed on the auxiliary cover body (215) through a hose joint (216); the other end of the hose (218) is connected with a smoke exhaust pipe (219).

4. A well type tempering furnace for heat treatment according to claim 1, characterized in that: the shell unit (22) comprises a spiral heating pipe (221), a support rod (222), a tempering cylinder (223), a placing frame (224), a heat conducting rod (225), a heat conducting plate (226) and a preheating device (227); supporting rods (222) are arranged on the periphery and the bottom side of the tempering cylinder (223); a plurality of spiral heating pipes (221) are arranged on the outer side of the rod wall of the supporting rod (222); a placing frame (224) is arranged on the inner side of the tempering cylinder (223); a plurality of heat conducting rods (225) are arranged below the placing rack (224); a heat conducting plate (226) is arranged below the heat conducting rod (225); and a preheating device (227) is arranged on one side of the spiral heating pipe (221) far away from the rotating handle (12).

5. A well type tempering furnace for heat treatment according to claim 1, characterized in that: the power output mechanism (3) comprises a vertical bevel gear shaft (31), a vertical pipe (32), a horizontal bevel gear shaft (33), a supporting shaft frame (34), a speed reducer (35), a variable frequency motor (36) and a shaft frame base (37); a vertical pipe (32) is arranged below the vertical bevel gear shaft (31); a horizontal bevel gear shaft (33) is arranged on one side of the vertical pipe (32); a reducer (35) is arranged on one side, away from the vertical pipe (32), of the horizontal bevel gear shaft (33); a variable frequency motor (36) is arranged on one side of the bevel gear shaft (33) far away from the speed reducer (35); a support shaft bracket (34) is arranged below the shell unit (22); and a shaft bracket base (37) is arranged below the supporting shaft bracket (34).

6. The well-type tempering furnace for heat treatment according to claim 4, wherein: the preheating device (227) comprises an air inlet pipe (2271), a guide pipe (2272), a check valve (2273), a heat conduction pipe (2274), a control valve (2275), a preheating box (2276), a heat preservation layer (2277), an inner container (2278), a supporting plate (2279) and a supporting frame (2270); the lower end of the air inlet pipe (2271) is connected with a preheating tank (2276); the inner wall of the preheating box (2276) is provided with a heat preservation layer (2277); the inner wall of the heat-insulating layer (2277) is wrapped with an inner container (2278); the inner wall of the inner container (2278) is wrapped with a heat conduction pipe (2274); a control valve (2275) is arranged in the heat conduction pipe (2274); a supporting plate (2279) is arranged below the preheating box (2276); a support frame (2270) is arranged below the supporting plate (2279).

7. A well type tempering furnace for heat treatment according to claim 2, characterized in that: a second driven wheel (191) is also arranged in the first driven wheel (19); the threaded rod (16) is arranged at the wheel core of the second driven wheel (191) in a penetrating mode.

8. The well-type tempering furnace for heat treatment according to claim 4, wherein: the upper end of the heat conducting rod (225) is embedded into the placing frame (224); the lower end of the heat conducting rod (225) is embedded into the heat conducting plate (226); each row of the heat conducting rods (225) is fixed together through a fixing rod.