Automatic metal pipe extrusion forming device for vacuum pump

Abstract

The invention discloses an automatic metal pipe extrusion forming device for a vacuum pump, and relates to the technical field of metal pipe preparation, the automatic metal pipe extrusion forming device comprises an extruder, a feeding hopper is fixedly connected to the top surface of the extruder, a cavity is formed in the side wall of the extruder, a cooling cavity is formed in the bottom end of the extruder, and a fixing frame is fixedly connected to the end surface of the extruder; a motor is installed in the fixing frame, a screw rod is fixedly connected to the output end of the motor, and a flow dividing block is fixedly connected to the inner surface of the output end of the extruder. The cooling device has the advantages that the cooling efficiency of the metal pipe and the production efficiency of the metal pipe can be synchronously adjusted, the material blocking phenomenon is avoided, and normal production work is guaranteed; meanwhile, manual step-by-step operation is not needed, control elements are correspondingly reduced, the wire arrangement difficulty and cost input are reduced, meanwhile, the cooling mechanism and the extruder coincide, external matching devices are not needed, and therefore the occupied area of the device is greatly reduced, and the working space can be fully utilized.

Description

Technical Field

[0001] The invention relates to the technical field of metal pipe preparation, in particular to an automatic extrusion molding device for a metal pipe for a vacuum pump. Background Art

[0002] Metal pipes are made of a whole piece of metal. Steel pipes with no seams on the surface are called seamless steel pipes. Seamless pipes are divided into hot-rolled pipes, cold-rolled pipes, cold-drawn pipes, extruded pipes, jacking pipes, etc. According to the cross-sectional shape, seamless steel pipes are divided into round and special-shaped ones. Special-shaped pipes have a variety of complex shapes such as square, triangle, hexagon, and finned pipes. Depending on the purpose, there are thick-walled pipes and thin-walled pipes. Metal seamless pipes are also of great significance in vacuum pumps.

[0003] After searching, Chinese patent number CN212526006U discloses a metal seamless pipe extrusion forming device. Although the uniformity of the metal seamless pipe wall is reduced, and the device has a simple structure, low cost, safe use and improved practicality, it requires external supporting devices, such as a cooling device for the metal pipe, so that the device still occupies a large area and the working space is not fully utilized. At the same time, the cooling efficiency of the metal pipe cannot be adjusted synchronously with the production efficiency of the metal pipe, which is prone to blockage, affecting normal production work, and requires multiple manual operations. Correspondingly, multiple control components need to be arranged, which increases the difficulty of wiring and cost investment. Summary of the invention

[0004] The purpose of the present invention is to provide an automatic extrusion molding device for metal pipes used in vacuum pumps.

[0005] In order to solve the problems raised in the above background technology, the present invention provides the following technical solutions: an automatic extrusion molding device for metal pipes for vacuum pumps, comprising an extruder, a feed hopper is fixedly connected to the top surface of the extruder, a cavity is opened on the side wall of the extruder, a cooling cavity is arranged at the bottom end of the extruder, a fixed frame is fixedly connected to the end surface of the extruder, a motor is installed in the fixed frame, a screw rod is fixedly connected to the output end of the motor, a diverter block is fixedly connected to the inner surface of the output end of the extruder, an extrusion die is sleeved at the discharge port of the extruder, a transmission gear is fixedly sleeved on the outer surface of the screw rod, an acceleration gear is meshedly connected to the outer surface of the transmission gear, one end of a transmission shaft is fixedly connected to the central axis of the acceleration gear, and a turbine is sleeved on the other end of the transmission shaft; The output end of the turbine is fixedly sleeved with a wind cylinder, a fixed pipe is fixedly sleeved inside the wind cylinder, a vertical air duct is provided on the outer surface of the fixed pipe, a cold air pipe is fixedly sleeved on one end of the fixed pipe, a baffle is fixedly connected to the inner end surface of the other end of the fixed pipe, a hot air ring hole is provided on the end surface of the fixed pipe around the baffle, and a nozzle is installed on the top of the cooling chamber.

[0006] As a further solution of the present invention: the extrusion die surrounds the diverter block, the transmission gear and the acceleration gear are both located in the cavity, the diameter of the transmission gear is much larger than the diameter of the acceleration gear, the transmission shaft is rotatably connected to the side wall of the cavity, and the turbine is fixed to the extruder.

[0007] As a further solution of the present invention: the transmission shaft is fixedly connected to the turbofan of the turbine, the air duct is fixedly sleeved with the end face of the extruder, the cold air duct is fixedly sleeved with the end of the air duct, and the cold air duct extends into the cooling chamber, and the bottom end of the nozzle is flush with the outlet of the cold air duct.

[0008] As a further solution of the present invention: the central axis of the vertical air duct is tangent to the inner circle of the fixed pipe, and the vertical air duct is located in the air cylinder, and the central axis of the baffle block coincides with the central axis of the cold air duct.

[0009] As a further solution of the present invention: the outlet of the nozzle gradually shrinks, the inlet of the nozzle is connected to an external water pipe, and a plurality of nozzles are provided, and the plurality of nozzles are arranged side by side.

[0010] As a further solution of the present invention: the end face of the extruder is clamped with a connecting frame, the end face of the connecting frame is provided with a groove, a block is slidably sleeved in the groove, a sliding button is fixedly connected to the side wall of the block, a sliding groove is provided on the side wall of the connecting frame, a clamping rod is slidably sleeved in the sliding groove, a spring is fixedly connected between the clamping rod and the sliding groove, a rotating shaft is rotatably sleeved on the side wall of the connecting frame, a driving bevel gear is fixedly connected to the end of the rotating shaft, a driven bevel gear is meshedly connected to the outer surface of the driving bevel gear, a bidirectional screw rod is fixedly sleeved on the central axis of the driven bevel gear, both ends of the bidirectional screw rod are meshedly sleeved with sliders, and a folding wheel is rotatably connected to the side wall of the slider.

[0011] As a further solution of the present invention: the connecting frame is symmetrically arranged with respect to the extrusion die, the folding wheels are provided in multiple groups, and the multiple groups of folding wheels are all located between the connecting frames, the clamping block is clamped with the end of the extruder, and the sliding button is slidably sleeved with the side wall of the connecting frame.

[0012] As a further solution of the present invention: the contact end of the clamping rod and the clamping block is hemispherical, the clamping block pushes the clamping rod to translate, the active bevel gear, the driven bevel gear and the bidirectional screw are all located inside the connecting frame, and the slider is slidably connected to the side wall of the connecting frame.

[0013] As a further solution of the present invention: a metal tube is slidably sleeved between the deflecting wheels, the rotating shaft drives the driven bevel gear to rotate through the driving bevel gear, and the driven bevel gear drives the deflecting wheels of the same group to move in opposite directions through the bidirectional screw rod and the slider.

[0014] Adopting the above technical solution: Compared with the prior art, the beneficial effects of the present invention are: The present invention accelerates the rotation of the acceleration gear through the transmission gear, so that the transmission shaft on the acceleration gear quickly drives the turbofan to rotate, thereby causing the turbine to accelerate the air and inject the airflow into the wind tube, so that the airflow in the wind tube enters the fixed pipe through the vertical air duct, and the central axis of the vertical air duct is tangent to the inner circle of the fixed pipe, so that the airflow entering the fixed pipe through the vertical air duct forms a vortex, so that the hotter airflow is discharged from the fixed pipe through the hot air ring hole, and the colder airflow is deflected through the baffle block and discharged from the cold air pipe, so that the colder airflow enters the cooling cavity and forms a negative pressure below the nozzle, so that the cooling water in the nozzle is under the effect of atmospheric pressure. The water mist and the cold air flow together cool down the metal tube, thus optimizing the cooling effect of the metal tube. Meanwhile, when the extruder accelerates the production of the metal tube, the screw rod also accelerates its rotation accordingly. According to the above process, the turbine is finally accelerated to blow air, thereby increasing the cold air flow and water mist, further increasing the cooling efficiency of the metal tube, and making the cooling efficiency of the metal tube synchronously adjusted with the production efficiency of the metal tube, thus avoiding the blockage and ensuring the normal production work. Meanwhile, no manual step-by-step operation is required, thus reducing the control components accordingly, and reducing the difficulty and cost of wiring.

[0015] The present invention drives the active bevel gear to rotate through the rotating shaft, so that the driven bevel gear meshing with the active bevel gear rotates, thereby causing the bidirectional screw on the driven bevel gear to rotate, so that the sliders at both ends of the bidirectional screw move towards each other, and the turning wheels on the sliders are brought close to each other, so that the turning wheels can still limit and guide the metal pipe, so that the extrusion molding device can adapt to the production of metal pipes of various sizes. At the same time, through the limiting guidance of the turning wheels, the cooling mechanism can be overlapped with the extruder, and no external matching device is required, so that the floor space occupied by the device is greatly reduced, and the working space can be fully utilized.

[0016] The present invention pushes the card block to translate by a slide button, so that the card block is inserted into the end face of the extruder, thereby achieving the preliminary fixation of the connecting frame. At the same time, during the translation of the card block, the card block pushes the hemispherical end of the card rod, so that the hemispherical end of the card rod is pressed and translated, so that the card rod stretches the spring and is inserted into the extrusion mold at the same time, thereby achieving the purpose of further fixing the connecting frame, making the connecting frame fully stable, and when disassembling, only the return slide button is needed, so that the disassembly of the connecting frame is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an automatic extrusion molding device for metal pipes for vacuum pumps of the present invention; Figure 2 A rear view schematic diagram of an extruder in an embodiment of the present invention; Figure 3A half-section schematic diagram of an extruder in an embodiment of the present invention; Figure 4 A half-section schematic diagram of a fixed tube in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the connection frame in an embodiment of the present invention; Figure 6 This is a schematic diagram of a cooling chamber in an embodiment of the present invention; Figure 7 is a cross-sectional view of a groove in an embodiment of the present invention; Figure 8 It is a cross-sectional view of the connecting frame structure in an embodiment of the present invention; Fig. 9 Schematic diagram of the structure of a slider in an embodiment of the present invention.

[0018] In the figure: 1. extruder; 2. feed hopper; 3. cavity; 4. cooling cavity; 5. fixed frame; 6. motor; 7. screw rod; 8. diverter block; 9. extrusion die; 10. transmission gear; 11. acceleration gear; 12. transmission shaft; 13. turbine; 14. air cylinder; 15. fixed pipe; 16. vertical air duct; 17. hot air ring hole; 18. baffle block; 19. cold air duct; 20. nozzle; 21. connecting frame; 22. groove; 23. block; 24. slide button; 25. slide groove; 26. clamping rod; 27. spring; 28. rotating shaft; 29. ​​driving bevel gear; 30. driven bevel gear; 31. bidirectional screw rod; 32. slider; 33. folding wheel; 34. metal tube. DETAILED DESCRIPTION

[0019] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. Example 1

[0020] See also Figure 1-Figure 4 and Figure 6The present invention provides a technical solution: an automatic extrusion molding device for metal pipes for vacuum pumps, comprising an extruder 1, a feed hopper 2 is fixedly connected to the top surface of the extruder 1, a cavity 3 is opened on the side wall of the extruder 1, a cooling chamber 4 is arranged at the bottom end of the extruder 1, a fixing frame 5 is fixedly connected to the end surface of the extruder 1, a motor 6 is installed in the fixing frame 5, a screw rod 7 is fixedly connected to the output end of the motor 6, a diverter block 8 is fixedly connected to the inner surface of the output end of the extruder 1, an extrusion die 9 is sleeved at the discharge port of the extruder 1, a transmission gear 10 is fixedly sleeved on the outer surface of the screw rod 7, an acceleration gear 11 is meshedly connected to the outer surface of the transmission gear 10, one end of a transmission shaft 12 is fixedly connected to the central axis of the acceleration gear 11, and a turbine 13 is sleeved on the other end of the transmission shaft 12; The output end of the turbine 13 is fixedly sleeved with a wind tube 14, a fixed pipe 15 is fixedly sleeved inside the wind tube 14, a vertical air duct 16 is provided on the outer surface of the fixed pipe 15, a cold air pipe 19 is fixedly sleeved at one end of the fixed pipe 15, a baffle block 18 is fixedly connected to the inner end surface of the other end of the fixed pipe 15, a hot air ring hole 17 is provided on the end surface of the fixed pipe 15 around the baffle block 18, and a nozzle 20 is installed at the top of the cooling chamber 4.

[0021] See also Figure 3 and Figure 4 The extrusion die 9 surrounds the diverter block 8, the transmission gear 10 and the acceleration gear 11 are both located in the cavity 3, the diameter of the transmission gear 10 is much larger than the diameter of the acceleration gear 11, the transmission shaft 12 is rotatably connected to the side wall of the cavity 3, and the turbine 13 is fixedly connected to the extruder 1.

[0022] See also Figure 3 and Figure 4 The transmission shaft 12 is fixedly connected to the turbofan of the turbine 13, the air cylinder 14 is fixedly sleeved with the end face of the extruder 1, the cold air pipe 19 is fixedly sleeved with the end of the air cylinder 14, and the cold air pipe 19 extends into the cooling chamber 4, and the bottom end of the nozzle 20 is flush with the outlet of the cold air pipe 19.

[0023] See also Figure 4 The central axis of the vertical air duct 16 is tangent to the inner circle of the fixed tube 15 , and the vertical air duct 16 is located in the air cylinder 14 , and the central axis of the baffle block 18 coincides with the central axis of the cold air duct 19 .

[0024] See also Figure 4 The outlet of the nozzle 20 gradually shrinks, the inlet of the nozzle 20 is connected to an external water pipe, and a plurality of nozzles 20 are provided, and the plurality of nozzles 20 are arranged side by side.

[0025] Specifically, during the production of metal pipes for vacuum pumps, the transmission gear 10 on the screw rod 7 drives the acceleration gear 11 to rotate. At the same time, because the diameter of the transmission gear 10 is much larger than the diameter of the acceleration gear 11, the rotation speed of the acceleration gear 11 is much larger than the rotation speed of the transmission gear 10 and the screw rod 7, so that the transmission shaft 12 on the acceleration gear 11 quickly drives the turbofan to rotate, thereby causing the turbine 13 to accelerate the air and inject the airflow into the wind tube 14, so that the airflow in the wind tube 14 enters the fixed tube 15 through the vertical air duct 16, and the central axis of the vertical air duct 16 is tangent to the inner circle of the fixed tube 15, so that the airflow entering the fixed tube 15 through the vertical air duct 16 forms a vortex, so that the hotter airflow is discharged from the fixed tube 15 through the hot air ring hole 17, and the colder airflow is deflected through the baffle block 18 and discharged from the cold air tube 19 is discharged, so that a relatively cool airflow enters the cooling chamber 4 and forms a negative pressure under the nozzle 20, so that the cooling water in the nozzle 20 drips out under the action of atmospheric pressure, and is finally blown away by the relatively cool airflow to form water mist, so that the water mist and the relatively cool airflow cool the metal tube 34 together, thereby optimizing the cooling effect of the metal tube 34. At the same time, when the extruder 1 accelerates the production of the metal tube 34, the screw rod 7 also accelerates its rotation accordingly. According to the above process, the turbine 13 is finally accelerated to blow air, thereby increasing the amount of relatively cool airflow and water mist, further increasing the cooling efficiency of the metal tube 34, so that the cooling efficiency of the metal tube is synchronously adjusted with the production efficiency of the metal tube, thereby avoiding the occurrence of material blockage and ensuring normal production work. At the same time, there is no need for manual step-by-step operation, which correspondingly reduces the control components, reduces the difficulty of wiring and the cost investment. Example 2

[0026] See also Figure 8 and Fig. 9 The present invention provides a technical solution: an automatic extrusion forming device for metal pipes for vacuum pumps, a rotating shaft 28 is rotatably sleeved on the side wall of a connecting frame 21, a driving bevel gear 29 is fixedly connected to the end of the rotating shaft 28, a driven bevel gear 30 is meshedly connected to the outer surface of the driving bevel gear 29, a bidirectional screw rod 31 is fixedly sleeved on the central axis of the driven bevel gear 30, both ends of the bidirectional screw rod 31 are meshedly sleeved with a slider 32, and a folding wheel 33 is rotatably connected to the side wall of the slider 32.

[0027] See also Figure 5 and Figure 6 The connecting frame 21 is symmetrically arranged about the extrusion die 9, multiple groups of folding wheels 33 are arranged, and the multiple groups of folding wheels 33 are all located between the connecting frames 21, the clamping block 23 is clamped with the end of the extruder 1, and the sliding button 24 is slidably sleeved with the side wall of the connecting frame 21.

[0028] See also Figure 3 , Figure 8 and Fig. 9A metal tube 34 is slidably sleeved between the turning wheels 33, and the rotating shaft 28 drives the driven bevel gear 30 to rotate through the driving bevel gear 29, and the driven bevel gear 30 drives the turning wheels 33 of the same group to move in opposite directions through the bidirectional screw rod 31 and the slider 32.

[0029] Specifically, in the process of reducing the diameter of the metal tube 34 produced by the extrusion molding device, the active bevel gear 29 is driven to rotate through the rotating shaft 28, so that the driven bevel gear 30 meshing with the active bevel gear 29 rotates, thereby causing the bidirectional screw rod 31 on the driven bevel gear 30 to rotate, so that the sliders 32 at both ends of the bidirectional screw rod 31 move towards each other, and the folding wheels 33 on the sliders 32 are brought close, so that the folding wheels 33 can still limit and guide the metal tube 34, so that the extrusion molding device can adapt to the production of metal tubes 34 of various sizes. At the same time, through the limiting guidance of the folding wheel 33, the cooling mechanism can be overlapped with the extruder 1, without the need for external supporting devices, thereby greatly reducing the footprint of the device and making full use of the working space. Example 3

[0030] See also Figure 5 and Figure 7 The present invention provides a technical solution: an automatic extrusion molding device for metal pipes for vacuum pumps, wherein a connecting frame 21 is clamped on the end face of an extruder 1, a groove 22 is provided on the end face of the connecting frame 21, a block 23 is slidably sleeved in the groove 22, a slide button 24 is fixedly connected to the side wall of the block 23, a slide groove 25 is provided on the side wall of the connecting frame 21, a clamping rod 26 is slidably sleeved in the slide groove 25, and a spring 27 is fixedly connected between the clamping rod 26 and the slide groove 25.

[0031] See also Figure 7 and Figure 8 The contact end of the clamping rod 26 and the clamping block 23 is hemispherical, the clamping block 23 pushes the clamping rod 26 to translate, the active bevel gear 29, the driven bevel gear 30 and the bidirectional screw 31 are all located inside the connecting frame 21, and the slider 32 is slidably connected to the side wall of the connecting frame 21.

[0032] Specifically, during the process of fixing the connecting frame 21, the top end of the connecting frame 21 is flush with the extrusion die 9, and the bottom end of the connecting frame 21 is flush with the entrance of the cooling chamber 4. At this time, the connecting frame 21 will be in close contact with the extruder 1, and then the block 23 is pushed to translate through the slide button 24, so that the block 23 is inserted into the end face of the extruder 1, so as to achieve the preliminary fixation of the connecting frame 21. At the same time, during the translation of the block 23, the block 23 will push the hemispherical end of the card rod 26, so that the hemispherical end of the card rod 26 is pressed and translated, so that the card rod 26 stretches the spring 27 while inserting into the extrusion die 9, so as to achieve the purpose of further fixing the connecting frame 21, so that the connecting frame 21 can be fully stable. When disassembling, only the return slide button 24 is needed, so that the disassembly of the connecting frame 21 is easy.

[0033] The working principle and use process of the present invention are as follows: when a metal pipe needs to be extruded, metal powder is put into the feed hopper 2, and the feed hopper 2 controls the metal powder to enter the inner cavity of the extruder 1. At this time, the metal powder is melted by the extruder 1 to form a molten metal, and the motor 6 on the fixed frame 5 is started, so that the motor 6 drives the screw rod 7 to rotate, so that the screw rod 7 pushes the molten metal to move horizontally, so that the molten metal gathers at the discharge port of the extruder 1, and is shaped by the diverter block 8 and the extrusion die 9, so that the molten metal forms a metal pipe 34; After the above-mentioned metal tube 34 is formed, the metal tube 34 will pass through the deflection wheel 33 on the connecting frame 21, so that the deflection wheel 33 limits and guides the metal tube 34, so that the metal tube 34 bends and changes direction, and finally enters the cooling chamber 4. During the rotation of the above-mentioned screw rod 7, the transmission gear 10 on the screw rod 7 will drive the acceleration gear 11 to rotate. At the same time, because the diameter of the transmission gear 10 is much larger than the diameter of the acceleration gear 11, the rotation speed of the acceleration gear 11 is much larger than the rotation speed of the transmission gear 10 and the screw rod 7, so that the transmission shaft 12 on the acceleration gear 11 quickly drives the turbofan to rotate, and then the turbine 13 accelerates the air and injects the airflow into the wind tube 14, so that the airflow in the wind tube 14 enters the fixed tube 15 through the vertical air duct 16, and the central axis of the vertical air duct 16 is tangent to the inner circle of the fixed tube 15, so that the airflow entering the fixed tube 15 through the vertical air duct 16 forms a vortex, thereby making the hotter airflow The hot air is discharged from the fixed pipe 15 through the hot air ring hole 17, and the colder air flow is deflected through the baffle block 18 and discharged from the cold air pipe 19, so that the colder air flow enters the cooling chamber 4 and forms a negative pressure below the nozzle 20, so that the cooling water in the nozzle 20 drips out under the action of atmospheric pressure, and is finally blown away by the colder air flow to form water mist, so that the water mist and the colder air flow cool the metal pipe 34 together, thereby optimizing the cooling effect of the metal pipe 34. At the same time, when the extruder 1 accelerates the production of the metal pipe 34, the screw rod 7 also accelerates its rotation accordingly. According to the above process, the turbine 13 is finally accelerated to blow air, thereby increasing the colder air flow and water mist, further increasing the cooling efficiency of the metal pipe 34, so that the cooling efficiency of the metal pipe is synchronously adjusted with the production efficiency of the metal pipe, avoiding the phenomenon of material blocking, and ensuring normal production work. At the same time, no manual step-by-step operation is required, which correspondingly reduces the control components, reduces the difficulty of wiring and the cost investment; If the diameter of the metal tube 34 produced by the above-mentioned extrusion molding device is reduced, the active bevel gear 29 is driven to rotate through the rotating shaft 28, so that the driven bevel gear 30 meshing with the active bevel gear 29 rotates, thereby causing the bidirectional screw rod 31 on the driven bevel gear 30 to rotate, so that the sliders 32 at both ends of the bidirectional screw rod 31 move towards each other, and the deflection wheels 33 on the sliders 32 are brought close, so that the deflection wheels 33 can still limit and guide the metal tube 34, so that the extrusion molding device can adapt to the production of metal tubes 34 of various sizes. At the same time, through the limiting guidance of the deflection wheel 33, the cooling mechanism can be overlapped with the extruder 1, without the need for external supporting devices, thereby greatly reducing the footprint of the device, and making full use of the working space to complete the operation.

[0034] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. An automatic extrusion molding device for metal pipes for vacuum pumps, characterized in that: The invention comprises an extruder (1), wherein a feed hopper (2) is fixedly connected to the top surface of the extruder (1), a cavity (3) is formed on the side wall of the extruder (1), a cooling cavity (4) is arranged at the bottom end of the extruder (1), a fixing frame (5) is fixedly connected to the end surface of the extruder (1), a motor (6) is installed in the fixing frame (5), a screw rod (7) is fixedly connected to the output end of the motor (6), a diverter block (8) is fixedly connected to the inner surface of the output end of the extruder (1), an extrusion die (9) is sleeved at the discharge port of the extruder (1), a transmission gear (10) is fixedly sleeved on the outer surface of the screw rod (7), an acceleration gear (11) is meshedly connected to the outer surface of the transmission gear (10), one end of a transmission shaft (12) is fixedly connected to the central axis of the acceleration gear (11), and a turbine (13) is sleeved on the other end of the transmission shaft (12); The output end of the turbine (13) is fixedly sleeved with a wind tube (14), a fixed pipe (15) is fixedly sleeved inside the wind tube (14), a vertical air duct (16) is provided on the outer surface of the fixed pipe (15), a cold air pipe (19) is fixedly sleeved on one end of the fixed pipe (15), a baffle block (18) is fixedly connected to the inner end surface of the other end of the fixed pipe (15), a hot air ring hole (17) is provided on the end surface of the fixed pipe (15) around the baffle block (18), and a nozzle (20) is installed at the top end of the cooling chamber (4).

2. The automatic extrusion molding device for metal pipes for vacuum pumps according to claim 1, characterized in that: The extrusion die (9) surrounds the diverter block (8), the transmission gear (10) and the acceleration gear (11) are both located in the cavity (3), the diameter of the transmission gear (10) is much larger than the diameter of the acceleration gear (11), the transmission shaft (12) is rotatably connected to the side wall of the cavity (3), and the turbine (13) is fixedly connected to the extruder (1).

3. The automatic extrusion molding device for metal pipes for vacuum pumps according to claim 1, characterized in that: The transmission shaft (12) is fixedly connected to the turbofan of the turbine (13), the air cylinder (14) is fixedly sleeved to the end face of the extruder (1), the cold air pipe (19) is fixedly sleeved to the end of the air cylinder (14), and the cold air pipe (19) extends into the cooling chamber (4), and the bottom end of the nozzle (20) is flush with the outlet of the cold air pipe (19).

4. The automatic extrusion molding device for metal pipes for vacuum pumps according to claim 1, characterized in that: The central axis of the vertical air duct (16) is tangent to the inner circle of the fixed tube (15), and the vertical air duct (16) is located in the air cylinder (14), and the central axis of the baffle block (18) coincides with the central axis of the cold air duct (19).

5. The automatic extrusion molding device for metal pipes for vacuum pumps according to claim 1, characterized in that: The outlet of the spray head (20) gradually shrinks, the inlet of the spray head (20) is connected to an external water pipe, and a plurality of the spray heads (20) are provided, and the plurality of spray heads (20) are arranged side by side.

6. The automatic extrusion molding device for metal pipes for vacuum pumps according to claim 1, characterized in that: The end face of the extruder (1) is clamped with a connecting frame (21), the end face of the connecting frame (21) is provided with a groove (22), a clamping block (23) is slidably sleeved in the groove (22), a sliding button (24) is fixedly connected to the side wall of the clamping block (23), a sliding groove (25) is provided on the side wall of the connecting frame (21), a clamping rod (26) is slidably sleeved in the sliding groove (25), a spring (27) is fixedly connected between the clamping rod (26) and the sliding groove (25), and the connecting frame (21) is provided with a sliding groove (25). A rotating shaft (28) is rotatably sleeved on the side wall of the connecting frame (21), a driving bevel gear (29) is fixedly connected to the end of the rotating shaft (28), a driven bevel gear (30) is meshingly connected to the outer surface of the driving bevel gear (29), a bidirectional screw rod (31) is fixedly sleeved on the central axis of the driven bevel gear (30), a slider (32) is meshingly sleeved on both ends of the bidirectional screw rod (31), and a deflecting wheel (33) is rotatably connected to the side wall of the slider (32).

7. The automatic extrusion molding device for metal pipes for vacuum pumps according to claim 6, characterized in that: The connecting frame (21) is symmetrically arranged with respect to the extrusion die (9), a plurality of groups of the folding wheels (33) are arranged, and the plurality of groups of folding wheels (33) are all located between the connecting frames (21), the clamping block (23) is clamped with the end of the extruder (1), and the sliding button (24) is slidably sleeved with the side wall of the connecting frame (21).

8. The automatic extrusion molding device for metal pipes for vacuum pumps according to claim 6, characterized in that: The contact ends of the clamping rod (26) and the clamping block (23) are arranged in a hemispherical shape, the clamping block (23) pushes the clamping rod (26) to translate, the driving bevel gear (29), the driven bevel gear (30) and the bidirectional screw rod (31) are all located inside the connecting frame (21), and the sliding block (32) is slidably sleeved with the side wall of the connecting frame (21).

9. The automatic extrusion molding device for metal pipes for vacuum pumps according to claim 6, characterized in that: A metal tube (34) is slidably sleeved between the deflecting wheels (33); the rotating shaft (28) drives the driven bevel gear (30) to rotate via the driving bevel gear (29); and the driven bevel gear (30) drives the deflecting wheels (33) of the same group to move in opposite directions via the bidirectional screw rod (31) and the slider (32).

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