Normalizing furnace for producing standard connecting piece of tower crane

Abstract

The utility model discloses a normalizing furnace for tower crane standard connecting piece production, which relates to the technical field of tower crane standard connecting piece production, and comprises a normalizing furnace assembly, the normalizing furnace assembly is movably connected with a carrier mechanism, and the carrier mechanism is in transmission connection with a driving assembly; a hoisting mechanism is arranged above the normalizing furnace assembly, a cooling assembly is arranged on the inner side of the hoisting mechanism, and a plurality of fans are fixedly connected to the cooling assembly; the third motor drives the second lead screw to rotate, the second lead screw drives the carrier body to move in the direction of the furnace box in the rotating process, the multiple rollers at the bottom of the carrier body can make the carrier body move more smoothly, the working pressure of the second lead screw is reduced, and the inner groove can limit the moving direction of the rollers; the carrier body is prevented from deviating during movement; the second motor drives the first lead screw to rotate, the first lead screw drives the gate to move downwards till the gate is completely attached to the furnace box, a closed space is formed in the furnace box, and the gate can prevent high temperature in the furnace box from being dissipated to the outside.

Description

Technical Field

[0001] The utility model relates to the technical field of production of tower crane standard connecting parts, in particular to a normalizing furnace for production of tower crane standard connecting parts. Background Art

[0002] A tower crane is a type of slewing jib crane with its boom mounted on the top of a vertical tower. Tower cranes are widely used in building installation projects, especially in the construction of high-rise and super-high-rise industrial and civil buildings. They are mainly used for the installation of building structures and industrial equipment, lifting of building materials and components, vertical transportation of heavy objects, and short-distance horizontal transportation within construction sites. Standard connecting parts for tower cranes are mainly used to connect the main structures of tower cranes. As large-scale industrial equipment, tower cranes have very high quality requirements, and the quality requirements for standard connecting parts for tower cranes are also very high.

[0003] The production of standard tower crane connectors requires multiple steps, of which normalizing is a relatively important processing step. Normalizing involves heating the standard tower crane connectors to a critical temperature, holding the temperature for a period of time, and then cooling them in air. Normalizing can refine the grains within the standard tower crane connectors, eliminate internal stress, and make the structural structure of the standard tower crane connectors more uniform. Chinese Patent Publication No. CN 105154637 A discloses a circulating air-cooled normalizing furnace, comprising: a normalizing furnace housing and a furnace disposed within the normalizing furnace housing. The furnace housing is provided with a cooling fan and heat exchangers uniformly distributed below the cooling fan. The cooling fan is connected to an air guide plate, and the normalizing furnace housing is provided with a fan motor connected to the cooling fan.

[0004] The above-mentioned circulating air-cooled normalizing furnace uses cooling water and a cooling fan to generate a low-temperature airflow, which is blown toward the workpiece in the furnace to achieve a cooling effect. However, the cooling fan of the above-mentioned circulating air-cooled normalizing furnace is located in the furnace, and the low-temperature airflow generated by the fan during operation also flows rapidly in the furnace. The furnace is a space for heating the workpiece, and its interior is generally heated by electric heating or other media. Therefore, the furnace is in a high-temperature state for a long time. After the low-temperature airflow generated by the cooling fan enters the furnace, the temperature in the furnace will become extremely unstable, which is not conducive to the normal progress of the next normalizing work. Utility Model Content

[0005] The purpose of the utility model is to provide a normalizing furnace for the production of standard connecting parts of tower cranes, wherein the standard connecting parts of tower cranes are placed in batches on a carrier body, and then the carrier body is moved into a furnace box, and multiple electric heaters in the furnace box generate high temperature to heat the standard connecting parts of tower cranes. After heating, the carrier body is moved out of the furnace box, and then multiple fans blow air to cool the standard connecting parts of tower cranes. The low-temperature airflow generated by the fans not only enters the furnace box, but also solves the technical problems raised by the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A normalizing furnace for producing standard connecting parts for tower cranes comprises a normalizing furnace assembly, the normalizing furnace assembly being movably connected to a carrier structure, and the carrier structure being transmission-connected to a drive assembly; a hoisting mechanism being provided above the normalizing furnace assembly, a cooling assembly being provided inside the hoisting mechanism, and a plurality of fans being fixedly connected to the cooling assembly;

[0008] The normalizing furnace assembly includes a furnace box, with multiple electric heaters evenly fixedly connected on both sides of the furnace box; the bottom of the furnace box is fixedly connected to the bottom plate, and the side of the furnace box close to the carrier mechanism is slidably connected to the gate; inner grooves are provided on both sides of the top of the bottom plate, and the carrier mechanism is movably connected to the carrier mechanism through the two inner grooves;

[0009] The cooling assembly includes a movable plate, and multiple fans are evenly fixedly connected to the side of the movable plate close to the loading rack mechanism; multiple C-shaped frames are fixedly connected to the top of the movable plate, and the multiple C-shaped frames are fixedly connected to the winch mechanism; vertical frames are provided on both sides of the movable plate, and the vertical frames are provided with slide grooves on the side close to the movable plate, and the two sides of the movable plate are slidably connected to the two vertical frames through two slide grooves.

[0010] As a further technical solution of the present invention, a rectangular groove running through the bottom plate is provided in the middle of the bottom plate; T-shaped slide bars are integrally provided on both sides of the gate, and the gate is slidably connected to the furnace box through the slide bars; a connecting plate is fixedly connected to the top of the gate, and a threaded sleeve is provided in the middle of one side of the connecting plate.

[0011] As a further technical solution of the present invention, a second motor is provided above the connecting plate, the output shaft of the second motor is fixedly connected to the end of the first screw, the first screw is threadedly connected to the threaded sleeve, and the end of the first screw away from the second motor is rotatably connected to the top of the furnace box.

[0012] As a further technical solution of the present invention, the driving assembly includes motor three, the bottom of which is fixedly connected to the loading platform by bolts, and the bottom of the loading platform is fixedly connected to the top of the end of the base plate away from the furnace box; the output shaft of motor three is fixedly connected to a driving pulley, a driven pulley is provided below the driving pulley, and the driving pulley is connected to the driven pulley through a belt.

[0013] As a further technical solution of the present invention, the driven pulley is fixedly connected to the second screw rod, which is located in the middle of the inner side of the rectangular groove, and the two ends of the second screw rod are respectively rotatably connected to the two ends of the base plate.

[0014] As a further technical solution of the present invention, the described carrier mechanism includes a carrier body, the four corners of the bottom of the carrier body are fixedly connected with connecting parts, the lower ends of multiple connecting parts are rotatably connected with rollers, and the multiple rollers are respectively located on the inner sides of the two inner grooves; two threaded sleeves 2 are fixedly connected to the middle of the bottom of the carrier body, and the two threaded sleeves 2 are both threadedly connected to the screw rod 2.

[0015] As a further technical solution of the present invention, the hoisting mechanism includes motor 1, the output shaft of motor 1 is fixedly connected to the input end of the reducer, and the output end of the reducer is fixedly connected to the transmission roller; the two ends of the transmission roller are respectively rotatably connected to the two bearing seats, and the bottoms of the two bearing seats are fixedly connected to the vertical frame; a top plate is provided on the top of the vertical frame, and motor 1 and the reducer are fixedly connected to the top of the top plate.

[0016] As a further technical solution of the present invention, a plurality of winch wheels are symmetrically fixedly connected to the transmission roller, and cables are wound around the plurality of winch wheels; the ends of the plurality of cables are respectively fixedly connected to the tops of a plurality of C-shaped frames; the top of the top plate is fixedly connected to a mounting frame by bolts, and the side of the mounting frame away from the top plate is fixedly connected to the second motor by bolts.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The utility model first places the tower crane standard connecting parts in batches into the carrier body, and the carrier body is provided with multi-layer placement grooves, so that the carrier body can prevent a large number of tower crane standard connecting parts at one time; the motor three drives the screw rod two to rotate, and the screw rod two drives the carrier body to move toward the furnace box during the rotation. The multiple rollers at the bottom of the carrier body can make the carrier body move more smoothly and reduce the working pressure of the screw rod two. The inner groove can limit the moving direction of the roller to prevent the carrier body from shifting during movement; after the carrier body moves into the furnace box, the motor two drives the screw rod one to rotate, and the screw rod one drives the gate to move downward until the gate is completely fitted with the furnace box, so that the inside of the furnace box becomes a closed space. The gate can prevent the high temperature in the furnace box from dissipating to the outside, which can not only increase the efficiency of the furnace box heating the tower crane standard connecting parts, but also ensure the temperature stability in the furnace box.

[0019] 2. In the present invention, multiple electric heaters in the furnace box generate high temperature synchronously, allowing the space inside the furnace box to heat up quickly and heat the standard connecting parts of the tower crane; the furnace box is embedded with thermal insulation cotton, which can prevent the high temperature from diffusing into the external environment through the furnace box body, further increasing the efficiency of the furnace box in heating the standard connecting parts of the tower crane, and further ensuring the stability of the temperature in the furnace box.

[0020] 3. In the present invention, after the standard connecting parts of the tower crane are heated, the motor 2 drives the gate to rise and reset through the screw rod 1, and then the motor 3 drives the carrier body away from the furnace box and reset through the screw rod 2; after the carrier body is reset, the motor 1 cooperates with the reducer to drive the transmission roller to rotate, and the transmission roller synchronously drives multiple winches to rotate and unwind the cable. After the cable is unwound, the movable plate descends under the action of its own gravity until the multiple fans descend to the position corresponding to the carrier body; the two vertical frames support the movable plate and at the same time limit the range of movement of the movable plate when the movable plate descends to prevent the movable plate from tilting; the airflow generated by the multiple fans blows quickly to the carrier body, and the standard connecting parts of the tower crane on the carrier body are naturally cooled. Using the airflow at normal temperature to cool the standard connecting parts of the tower crane can prevent the standard connecting parts of the tower crane from cracking due to excessive temperature difference, thereby ensuring the quality of the standard connecting parts of the tower crane. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural diagram of the utility model.

[0022] Figure 2 This utility model Figure 1 side view.

[0023] Figure 3 This utility model Figure 1 Top view of .

[0024] Figure 4 This utility model Figure 1 Schematic diagram of part of the structure.

[0025] Figure 5 This utility model Figure 4 Top view of .

[0026] Figure 6 This utility model Figure 5 AA cross-sectional view.

[0027] Figure 7 This utility model Figure 2 Schematic diagram of part of the structure.

[0028] Figure 8 This utility model Figure 7 main view.

[0029] Figure 9 This utility model Figure 7 Another perspective of the picture.

[0030] In the figure: 1- hoisting mechanism, 2- cooling assembly, 3- fan, 4- normalizing furnace assembly, 5- carrier mechanism, 6- drive assembly;

[0031] 11-motor 1, 12-reducer, 13-drive roller, 14-winch, 15-cable, 16-bearing seat, 17-stand, 18-top plate, 19-mounting frame, 21-movable plate, 22-C-shaped frame, 23-vertical frame, 41-furnace box, 42-electric heater, 43-bottom plate, 44-inner groove, 45-rectangular groove, 46-gate, 47-connecting plate, 48-motor 2, 49-screw 1, 40-threaded sleeve 1, 51-carrier body, 52-connector, 53-roller, 54-threaded sleeve 2, 61-motor 3, 62-carrier, 63-screw 2, 64-belt, 65-driving pulley, 66-driven pulley. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] See also Figure 1-9In an embodiment of the present invention, a normalizing furnace for producing standard connecting parts of a tower crane includes a normalizing furnace assembly 4, which is movably connected to a carrier structure 5, and the carrier structure 5 is transmission-connected to a driving assembly 6; a hoisting mechanism 1 is provided above the normalizing furnace assembly 4, and a cooling assembly 2 is provided inside the hoisting mechanism 1, and a plurality of fans 3 are fixedly connected to the cooling assembly 2;

[0034] The normalizing furnace assembly 4 includes a furnace box 41, with multiple electric heaters 42 evenly fixedly connected on both sides of the furnace box 41; the bottom of the furnace box 41 is fixedly connected to the bottom plate 43, and the side of the furnace box 41 close to the carrier mechanism 5 is slidably connected to the gate 46; both sides of the top of the bottom plate 43 are provided with inner grooves 44, and the carrier mechanism 5 is movably connected to the carrier mechanism 5 through the two inner grooves 44;

[0035] The cooling assembly 2 includes a movable plate 21, and a plurality of fans 3 are evenly fixedly connected to the side of the movable plate 21 close to the carrier mechanism 5; a plurality of C-shaped frames 22 are fixedly connected to the top of the movable plate 21, and the plurality of C-shaped frames 22 are fixedly connected to the hoisting mechanism 1; vertical frames 23 are provided on both sides of the movable plate 21, and a slide groove is provided on the side of the vertical frames 23 close to the movable plate 21, and the two sides of the movable plate 21 are slidably connected to the two vertical frames 23 through two slide grooves respectively;

[0036] A rectangular groove 45 is provided in the middle of the bottom plate 43, which passes through the bottom plate 43; T-shaped slides are integrally provided on both sides of the gate 46, and the gate 46 is slidably connected to the furnace box 41 through the slides; a connecting plate 47 is fixedly connected to the top of the gate 46, and a threaded sleeve 40 is provided in the middle of one side of the connecting plate 47.

[0037] By adopting the above technical solution, firstly, the tower crane standard connecting parts are placed in batches into the carrier body 51. The carrier body 51 is provided with a multi-layer placement groove, so that the carrier body 51 can prevent a large number of tower crane standard connecting parts from being placed at one time; the motor 3 61 drives the screw rod 2 63 to rotate, and the screw rod 2 63 drives the carrier body 51 to move toward the furnace box 41 during the rotation process. The multiple rollers 53 at the bottom of the carrier body 51 can make the carrier body 51 move more smoothly, reduce the working pressure of the screw rod 2 63, and the inner groove 4 4 can limit the moving direction of the roller 53 to prevent the carrier body 51 from deflecting during movement; after the carrier body 51 moves into the furnace box 41, the motor 2 48 drives the screw 1 49 to rotate, and the screw 1 49 drives the gate 46 to move downward until the gate 46 is completely in contact with the furnace box 41, making the interior of the furnace box 41 a closed space. The gate 46 can prevent the high temperature in the furnace box 41 from being dissipated to the outside, which can not only increase the efficiency of the furnace box 41 in heating the standard connecting parts of the tower crane, but also ensure the temperature stability in the furnace box 41.

[0038] In this embodiment, a second motor 48 is provided above the connecting plate 47. The output shaft of the second motor 48 is fixedly connected to the end of a first screw 49. The first screw 49 is threadedly connected to the threaded sleeve 40. The end of the first screw 49 away from the second motor 48 is rotatably connected to the top of the furnace box 41.

[0039] The driving assembly 6 includes a motor three 61, the bottom of which is fixedly connected to a loading platform 62 by bolts, and the bottom of the loading platform 62 is fixedly connected to the top of the end of the base plate 43 away from the furnace box 41; the output shaft of the motor three 61 is fixedly connected to a driving pulley 65, and a driven pulley 66 is provided below the driving pulley 65, and the driving pulley 65 is connected to the driven pulley 66 through a belt 64.

[0040] By adopting the above technical solution, multiple electric heaters 42 in the furnace box 41 generate high temperatures simultaneously, allowing the space inside the furnace box 41 to heat up quickly and heat the standard connecting parts of the tower crane; the furnace box 41 is embedded with heat insulation cotton, which can prevent the high temperature from diffusing into the external environment through the box body of the furnace box 41, further increasing the efficiency of the furnace box 41 in heating the standard connecting parts of the tower crane, and further ensuring the stability of the temperature inside the furnace box 41.

[0041] In this embodiment, the driven pulley 66 is fixedly connected to the second screw rod 63, which is located in the middle of the inner side of the rectangular groove 45, and the two ends of the second screw rod 63 are respectively rotatably connected to the two ends of the bottom plate 43;

[0042] The carrier mechanism 5 includes a carrier body 51, with connectors 52 fixedly connected to the four corners of the bottom of the carrier body 51. The lower ends of the multiple connectors 52 are rotatably connected to rollers 53, and the multiple rollers 53 are respectively located inside the two inner grooves 44; two threaded sleeves 54 are fixedly connected to the middle of the bottom of the carrier body 51, and the two threaded sleeves 54 are both threadedly connected to the screw rod 63;

[0043] The hoisting mechanism 1 includes a motor 11, the output shaft of which is fixedly connected to the input end of a reducer 12, and the output end of the reducer 12 is fixedly connected to a transmission roller 13; the two ends of the transmission roller 13 are respectively rotatably connected to two bearing seats 16, and the bottoms of the two bearing seats 16 are fixedly connected to a stand 17; a top plate 18 is provided on the top of the stand 17, and the motor 11 and the reducer 12 are fixedly connected to the top of the top plate 18;

[0044] The transmission roller 13 is symmetrically fixedly connected to a plurality of winch wheels 14, and cables 15 are wound around the plurality of winch wheels 14; the ends of the plurality of cables 15 are respectively fixedly connected to the tops of a plurality of C-shaped frames 22; the top of the top plate 18 is fixedly connected to a mounting frame 19 by bolts, and the side of the mounting frame 19 away from the top plate 18 is fixedly connected to the motor 2 48 by bolts.

[0045] By adopting the above technical solution, after the standard connecting parts of the tower crane are heated, the motor 2 48 drives the gate 46 to rise and reset through the screw rod 1 49, and then the motor 3 61 drives the carrier body 51 away from the furnace box 41 and resets through the screw rod 2 63; after the carrier body 51 is reset, the motor 11 cooperates with the reducer 12 to drive the transmission roller 13 to rotate, and the transmission roller 13 synchronously drives the multiple winches 14 to rotate and unwind the cable 15. After the cable 15 is unwound, the movable plate 21 descends under the action of its own gravity until the multiple fans 3 are lowered. The two vertical frames 23 support the movable plate 21 and limit the range of motion of the movable plate 21 when the movable plate 21 descends, thereby preventing the movable plate 21 from tilting. The airflow generated by the multiple fans 3 quickly blows toward the carrier body 51, and naturally cools down the standard tower crane connectors on the carrier body 51. Using the airflow at normal temperature to cool down the standard tower crane connectors can prevent cracks in the standard tower crane connectors due to excessive temperature differences, thereby ensuring the quality of the standard tower crane connectors.

[0046] The working principle of the utility model is as follows: first, the standard connecting parts of the tower crane are placed in batches into the carrier body 51, and the carrier body 51 is provided with a multi-layer placement groove, so that the carrier body 51 can prevent a large number of standard connecting parts of the tower crane from being placed at one time; the motor 3 61 drives the screw rod 2 63 to rotate, and the screw rod 2 63 drives the carrier body 51 to move toward the furnace box 41 during the rotation process, and the multiple rollers 53 at the bottom of the carrier body 51 can make the carrier body 51 move more smoothly, reduce the working pressure of the screw rod 2 63, and the inner groove 4 4 can limit the moving direction of the roller 53 to prevent the carrier body 51 from deflecting during movement; after the carrier body 51 moves into the furnace box 41, the motor 2 48 drives the screw 1 49 to rotate, and the screw 1 49 drives the gate 46 to move downward until the gate 46 is completely in contact with the furnace box 41, making the interior of the furnace box 41 a sealed space. The gate 46 can prevent the high temperature in the furnace box 41 from being dissipated to the outside, which can not only increase the efficiency of the furnace box 41 in heating the standard connecting parts of the tower crane, but also ensure the temperature stability in the furnace box 41;

[0047] Multiple electric heaters 42 in the furnace box 41 generate high temperatures simultaneously, allowing the space inside the furnace box 41 to heat up quickly and heat the standard connecting parts of the tower crane. The furnace box 41 is embedded with heat insulation cotton, which can prevent the high temperature from diffusing into the external environment through the box body of the furnace box 41, further increasing the efficiency of the furnace box 41 in heating the standard connecting parts of the tower crane and further ensuring the temperature stability in the furnace box 41.

[0048] After the standard tower crane connector is heated, motor 2 48 drives gate 46 to rise and reset via screw 1 49, and then motor 3 61 drives carrier body 51 away from furnace box 41 and reset via screw 2 63. After carrier body 51 is reset, motor 1 11 cooperates with reducer 12 to drive transmission roller 13 to rotate, and transmission roller 13 synchronously drives multiple winches 14 to rotate and unwind cables 15. After the cables 15 are unwound, movable plate 21 descends under the action of its own gravity until multiple fans 3 descend to the position corresponding to carrier body 51. The two vertical frames 23 support the movable plate 21 and limit the range of movement of the movable plate 21 when the movable plate 21 descends, preventing the movable plate 21 from tilting. The airflow generated by multiple fans 3 blows rapidly toward carrier body 51, naturally cooling the standard tower crane connector on carrier body 51. Using normal temperature airflow to cool the standard tower crane connector can prevent cracks in the standard tower crane connector due to excessive temperature difference, thereby ensuring the quality of the standard tower crane connector.

[0049] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A normalizing furnace for producing standard connecting parts for tower cranes, characterized by: The invention comprises a normalizing furnace assembly (4), wherein the normalizing furnace assembly (4) is movably connected to a carrier mechanism (5), and the carrier mechanism (5) is transmission-connected to a driving assembly (6); a hoisting mechanism (1) is provided above the normalizing furnace assembly (4), a cooling assembly (2) is provided inside the hoisting mechanism (1), and a plurality of fans (3) are fixedly connected to the cooling assembly (2); The normalizing furnace assembly (4) includes a furnace box (41), and a plurality of electric heaters (42) are evenly fixedly connected on both sides of the interior of the furnace box (41); the bottom of the furnace box (41) is fixedly connected to the bottom plate (43), and the side of the furnace box (41) close to the carrier mechanism (5) is slidably connected to the gate (46); both sides of the top of the bottom plate (43) are provided with inner grooves (44), and the carrier mechanism (5) is movably connected to the carrier mechanism (5) through the two inner grooves (44); The cooling assembly (2) includes a movable plate (21), and a plurality of fans (3) are evenly fixedly connected to one side of the movable plate (21) close to the load-carrying rack mechanism (5); a plurality of C-shaped frames (22) are fixedly connected to the top of the movable plate (21), and the plurality of C-shaped frames (22) are fixedly connected to the hoisting mechanism (1); vertical frames (23) are provided on both sides of the movable plate (21), and a sliding groove is provided on one side of the vertical frames (23) close to the movable plate (21), and the two sides of the movable plate (21) are slidably connected to the two vertical frames (23) through two sliding grooves.

2. The normalizing furnace for producing tower crane standard connecting parts according to claim 1, characterized in that: A rectangular groove (45) passing through the bottom plate (43) is provided in the middle of the bottom plate (43); T-shaped slide bars are integrally provided on both sides of the gate (46), and the gate (46) is slidably connected to the furnace box (41) through the slide bars; a connecting plate (47) is fixedly connected to the top of the gate (46), and a threaded sleeve (40) is provided in the middle of one side of the connecting plate (47).

3. The normalizing furnace for producing tower crane standard connecting parts according to claim 2, characterized in that: A second motor (48) is provided above the connecting plate (47), and the output shaft of the second motor (48) is fixedly connected to the end of the first screw (49), the first screw (49) is threadedly connected to the first threaded sleeve (40), and the end of the first screw (49) away from the second motor (48) is rotatably connected to the top of the furnace box (41).

4. The normalizing furnace for producing tower crane standard connecting parts according to claim 1, characterized in that: The driving assembly (6) includes a motor three (61), the bottom of the motor three (61) is fixedly connected to the loading platform (62) by bolts, and the bottom of the loading platform (62) is fixedly connected to the top of the end of the bottom plate (43) away from the furnace box (41); the output shaft of the motor three (61) is fixedly connected to the driving pulley (65), and a driven pulley (66) is provided below the driving pulley (65), and the driving pulley (65) is connected to the driven pulley (66) through a belt (64).

5. The normalizing furnace for producing tower crane standard connecting parts according to claim 4, characterized in that: The driven pulley (66) is fixedly connected to the second screw rod (63), and the second screw rod (63) is located in the middle of the inner side of the rectangular groove (45), and the two ends of the second screw rod (63) are respectively rotatably connected to the two ends of the bottom plate (43).

6. The normalizing furnace for producing tower crane standard connecting parts according to claim 5, characterized in that: The object carrier mechanism (5) comprises an object carrier body (51), the bottom four corners of the object carrier body (51) are fixedly connected to connecting members (52), the lower ends of the multiple connecting members (52) are rotatably connected to rollers (53), and the multiple rollers (53) are respectively located inside the two inner grooves (44); two threaded sleeves (54) are fixedly connected to the middle of the bottom of the object carrier body (51), and the two threaded sleeves (54) are both threadedly connected to the screw rod (63).

7. The normalizing furnace for producing tower crane standard connecting parts according to claim 6, characterized in that: The hoisting mechanism (1) includes a motor (11), the output shaft of the motor (11) is fixedly connected to the input end of the reducer (12), and the output end of the reducer (12) is fixedly connected to the transmission roller (13); the two ends of the transmission roller (13) are respectively rotatably connected to two bearing seats (16), and the bottoms of the two bearing seats (16) are fixedly connected to the stand (17); the top of the stand (17) is provided with a top plate (18), and the motor (11) and the reducer (12) are fixedly connected to the top of the top plate (18).

8. The normalizing furnace for producing tower crane standard connecting parts according to claim 7, characterized in that: The transmission roller (13) is symmetrically fixedly connected to a plurality of winches (14), and cables (15) are wound around the plurality of winches (14); the ends of the plurality of cables (15) are respectively fixedly connected to the tops of the plurality of C-shaped frames (22); the top of the top plate (18) is fixedly connected to a mounting frame (19) by bolts, and the side of the mounting frame (19) away from the top plate (18) is fixedly connected to the second motor (48) by bolts.

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