Rotary intermittent air supply mechanism

Abstract

The utility model relates to a rotary intermittent air supply mechanism which comprises a base provided with a first cavity penetrating up and down, and the side face of the base is provided with a mounting opening not communicating with the first cavity; the driving assembly is mounted at the mounting opening; the rotating assembly comprises a rotating supporting shaft and a middle rotating disc, the rotating supporting shaft is partially and rotatably arranged at the position of an upper cavity opening of the base, the rotatable part of the rotating supporting shaft is fixedly connected with the middle rotating disc and is in transmission connection with the driving assembly, and a second cavity is formed in the middle rotating disc; the second cavity is communicated with the first cavity; and the cooling air nozzles with adjustable air ports are arranged on the top surface of the middle rotating disc, and the interiors of the cooling air nozzles are communicated with the second cavity. By means of the cooling air supply device, the cooling air supply flow can be controlled, machined parts grabbed on the middle rotary disc can be machined at different angles, and cooling air can be continuously supplied.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automatic processing equipment, in particular to a rotary intermittent air supply mechanism. BACKGROUND

[0002] At present, many products need to use cooling air in the automatic processing process, especially in some special processing environment, the amount of cooling air has great requirements, and the air volume provided by the existing rubber tube or stainless steel tube is difficult to meet the requirement of large air volume. Secondly, the automatic processing process is often completed in a high temperature environment, and is accompanied by rotation, turning and other process actions, which has more restrictions on the cooling air delivery mode, and it is also difficult to meet the requirements by using rubber tube or stainless steel tube. In addition, in order to ensure the normal continuous production of the equipment, many people choose to maintain the continuous supply of cooling air, which not only causes the deterioration of the processing environment, but also causes the waste of wind resources, and there are great production disadvantages.

[0003] Therefore, it is necessary to provide a rotary intermittent air supply mechanism to solve the problem that the existing cooling air mechanism is difficult to meet the cooling air supply requirement in the special processing environment. SUMMARY

[0004] The present application provides a rotary intermittent air supply mechanism, which can solve the problem that the existing cooling air mechanism is difficult to meet the cooling air supply requirement in the special processing environment.

[0005] In a first aspect, the present application provides a rotary intermittent air supply mechanism, comprising: a base, a driving assembly, a rotating assembly and a plurality of air outlet adjustable cooling air nozzles. Wherein the base is provided with a first cavity penetrating from top to bottom, and the side surface of the base is provided with a mounting port not communicating with the first cavity. The driving assembly is installed at the mounting port. The rotating assembly comprises a rotary support shaft and an intermediate turntable, the rotary support shaft is partially rotatably arranged at the upper cavity port of the base, and the rotatable part thereof is fixedly connected with the intermediate turntable and drivingly connected with the driving assembly, and the intermediate turntable is provided with a second cavity, and the second cavity communicates with the first cavity. A plurality of air outlet adjustable cooling air nozzles are arranged on the top surface of the intermediate turntable, and the interior of each cooling air nozzle communicates with the second cavity.

[0006] In some embodiments, the top surface of the base extends to form a mounting plate in the direction of the mounting port, and the driving assembly is fixedly installed at the mounting port through the mounting plate.

[0007] In some embodiments, a plurality of waist-shaped holes are formed on the mounting plate, and the driving assembly is installed on the mounting plate through the mounting member penetrating through the waist-shaped holes.

[0008] In some embodiments, the rotary support shaft comprises an inner ring and an outer ring, the inner ring is fixed at the upper cavity opening of the base, and the ring center of the inner ring is opposite to the position of the upper cavity opening, the outer ring is sleeved on the inner ring, and the two can rotate relative to each other, and the outer ring is drivingly connected with the driving assembly.

[0009] In some embodiments, the inner ring and the outer ring are connected through a roller bearing.

[0010] In some embodiments, the driving assembly comprises a servo motor and a speed reducer, the two are connected through a worm gear, and the speed reducer is connected with the outer ring through gear engagement.

[0011] In some embodiments, the intermediate rotating disc comprises an upper rotating disc and a lower rotating disc, the lower rotating disc is fixed on the top surface of the outer ring and fixedly connected with the bottom end of the upper rotating disc, the lower rotating disc is provided with a plurality of air passing holes, the second cavity is arranged in the upper rotating disc, and the second cavity is communicated with the first cavity through the air passing holes and the ring center.

[0012] In some embodiments, at least one window for replacing internal parts is arranged on the side surface of the upper rotating disc, and a cover plate is detachably mounted at the window.

[0013] In some embodiments, the cooling air nozzle comprises a shell, a cover plate and a cylinder, the shell is provided with a third cavity penetrating from top to bottom, one end of the cover plate is hinged to one side of the upper cavity opening of the shell, the lower cavity opening of the shell is communicated with the second cavity, the cylinder is arranged in the third cavity, and the piston rod of the cylinder is hinged to the other end of the cover plate.

[0014] In some embodiments, the cylinder is mounted on the two inner side walls of the shell.

[0015] The technical scheme provided by the embodiments has the beneficial effects that:

[0016] By arranging the first cavity penetrating from top to bottom in the base and making it communicated with the second cavity of the intermediate rotating disc and the interior of the cooling air nozzle, the air cooling air path is hidden in the rotary intermittent air supply mechanism, and no additional pipeline is arranged outside, thereby saving the installation space of the remaining components and enhancing the integrity of the appearance of the air supply mechanism. Meanwhile, the driving assembly is mounted on the mounting opening on the side surface of the base which is not communicated with the first cavity, so that the structure between the driving assembly and the base is more compact, and the cooling air can directly enter the interior of the rotary intermittent air supply mechanism through the first cavity of the base, thereby greatly reducing the escape of wind energy of the cooling air in the conveying path and avoiding energy waste.

[0017] By setting the cooling air nozzle in the form of an air port adjustable, the supply of the cooling air nozzle can be controlled, and the air port can be opened and closed as needed.

[0018] In addition, by rotatably arranging the slewing support shaft part at the upper cavity opening of the base, and rotatably connecting the rotatable part of the slewing support shaft part with the intermediate turntable and driving assembly, when the driving assembly is started, the rotatable part of the slewing support shaft part is rotated, and the rotation angle of the intermediate turntable is controlled, so that the workpiece gripped on the intermediate turntable at different angles can be machined; and the cooling air nozzle installed on the top surface of the intermediate turntable can also continuously supply air to the workpiece. Through the present application, the problem that the existing cooling air mechanism is difficult to meet the cooling air supply requirement in special machining environment is solved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0020] Figure 1 FIG. 1 is a schematic view of the rotating intermittent air supply mechanism in the present application;

[0021] Figure 2 FIG. 2 is a sectional view of the rotating intermittent air supply mechanism in the present application; Figure 1

[0022] FIG. 3 is a partially exploded schematic view of the rotating intermittent air supply mechanism in the present application; Figure 3 Figure 1 FIG. 4 is a schematic view of the cooling air nozzle in the present application.

[0023] Figure 4 Figure 1 FIG. 5 is a schematic view of the cooling air nozzle in the present application.

[0024] In the drawings:

[0025] 1, base; 11, first cavity; 12, mounting opening; 13, mounting plate; 131, waist-shaped hole;

[0026] 2, driving assembly; 21, servo motor; 22, speed reducer;

[0027] 3, rotating assembly; 31, slewing support shaft; 311, inner ring; 312, outer ring; 32, intermediate turntable; 321, second cavity; 322, upper turntable; 3221, sealing plate; 323, lower turntable; 3231, air passage;

[0028] 4, cooling air nozzle; 41, shell; 42, cover plate; 43, air cylinder; 44, third cavity. ​​Detailed Implementation

[0029] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0030] This application provides a rotary intermittent air supply mechanism, which can solve the problem that existing cooling air mechanisms are unable to meet the cooling air supply requirements for special processing environments.

[0031] Reference Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the rotary intermittent air supply mechanism in the embodiments of this application; Figure 2 for Figure 1 Cross-sectional view of the rotating intermittent air supply mechanism. (See figure) Figure 1 and Figure 2 As shown, in one embodiment, the rotating intermittent air supply mechanism includes a base 1, a drive assembly 2, a rotating assembly 3, and several adjustable cooling nozzles 4. Specifically, the base 1 has a first cavity 11 extending vertically, and the side of the base 1 has a mounting opening 12 that does not communicate with the first cavity 11. The drive assembly 2 is mounted at the mounting opening 12. The rotating assembly 3 includes a rotary support shaft 31 and an intermediate turntable 32. The rotary support shaft 31 is rotatably disposed at the upper cavity of the base 1, and its rotatable portion is fixedly connected to the intermediate turntable 32 and is drively connected to the drive assembly 2. The intermediate turntable 32 has a second cavity 321 that communicates with the first cavity 11. Several cooling nozzles 4 are disposed on the top surface of the intermediate turntable 32, and the interior of each cooling nozzle 4 communicates with the second cavity 321.

[0032] The base 1 is a support part of the whole rotating intermittent air supply mechanism. The first cavity 11 provided in the base 1 is vertically through, and provides a channel for the cooling air to enter the rotating intermittent air supply mechanism. The lower cavity of the base 1 cannot be smaller than the upper cavity, so that sufficient cooling air can enter the first cavity 11. The driving assembly 2 can be fixedly installed at the mounting port 12 of the side surface of the base 1 by means of mounting members such as tightening bolts or screw rods, and the driving assembly 2 can be freely adjusted in the installation position at the mounting port 12. The mounting port 12 is not communicated with the first cavity 11. The mounting port 12 can be formed by sacrificing part of the cavity volume of the first cavity 11, that is, the mounting port 12 is formed by recessing inward from the side surface of the base 1 and is not communicated with the first cavity 11. Of course, the mounting port 12 can be separately provided on the side surface of the base 1, and the two belong to different individuals. The rotatable part of the rotating support shaft 31 can rotate relative to the base 1, and the rotatable part is fixedly connected with the intermediate turntable 32 and is in transmission connection with the driving assembly 2. When the driving assembly 2 drives the rotatable part of the rotating support shaft 31 to rotate, the intermediate turntable 32 also rotates. The transmission mode between the rotatable part and the driving assembly 2 can be gear transmission, chain transmission or belt transmission. The first cavity 11 is communicated with the second cavity 321 and the inside of the cooling air nozzle 4. The cooling air provided by the on-site air source enters the second cavity 321 through the first cavity 11, and then enters the inside of the cooling air nozzle 4 and fills the whole second cavity 321 and the inside of the cooling air nozzle 4, so as to form a complete cooling air path. With the opening and closing of the air port of the cooling air nozzle 4, the cooling air can be turned on and off and the air volume can be adjusted.

[0033] In addition, the cooling air nozzle 4 can be uniformly arranged along the top surface of the intermediate turntable 32.

[0034] In the embodiment, the first cavity 11 is provided in the base 1 and is vertically through, and is communicated with the second cavity 321 of the intermediate turntable 32 and the inside of the cooling air nozzle 4, so that the air cooling air path is hidden in the rotating intermittent air supply mechanism, and no additional pipeline is arranged outside, thereby saving the installation space of the remaining components and enhancing the integrity of the appearance of the air supply mechanism. Meanwhile, the mounting port 12 which is not communicated with the first cavity 11 is arranged on the side surface of the base 1 to install the driving assembly 2. In this way, the structure between the driving assembly 2 and the base 1 is more compact, and the cooling air can directly enter the inside of the rotating intermittent air supply mechanism through the first cavity 11 of the base 1, which greatly reduces the escape of wind energy of the cooling air in the conveying path and avoids energy waste. By arranging the cooling air nozzle 4 in the form that the air port is adjustable, the supply of the cooling air nozzle 4 can be controlled.

[0035] Further, by rotatably arranging the slewing support shaft 31 at the upper cavity opening of the base 1, and rotatably connecting the rotatable part of the slewing support shaft 31 with the intermediate turntable 32, and drivingly connecting the driving assembly 2 with the slewing support shaft 31, when the driving assembly 2 is started, the rotatable part of the slewing support shaft 31 is driven to rotate, and the rotation angle of the intermediate turntable 32 is controlled, so that the workpiece held on the intermediate turntable 32 can be processed at different angles; and the cooling air nozzle 4 is installed on the top surface of the intermediate turntable 32, and can continuously supply air to the workpiece. Through the present application, the problem that the existing cooling air supply mechanism cannot meet the cooling air supply requirement in special processing environment is solved.

[0036] Further, in an embodiment, as shown in Figure 1 , the top surface of the base 1 extends towards the installation opening 12 to form an installation plate 13, and the driving assembly 2 is fixedly installed at the installation opening 12 through the installation plate 13. In the present embodiment, the driving assembly 2 is mainly used to drive the rotation assembly 3 to rotate, so that the cooling air nozzle 4 can exhaust air in different directions. By extending the top surface of the base 1 towards the installation opening 12 to form an installation plate 13, and installing the driving assembly 2 at the installation opening 12 through the installation plate 13, the driving assembly 2 is provided with more stable support, and the driving assembly 2 is less likely to loosen or shift due to uneven force or vibration during operation.

[0037] Further, in an embodiment, referring to Figure 3 , Figure 3 , it is a partially exploded schematic view of the rotation intermittent air supply mechanism. As shown in Figure 1 , a plurality of waist-shaped holes 131 are formed in the installation plate 13, and the driving assembly 2 is installed on the installation plate 13 through the waist-shaped holes 131. In the present embodiment, a plurality of waist-shaped holes 131 are formed in the installation plate 13, and the driving assembly 2 is installed on the installation plate 13 through the waist-shaped holes 131, and the installation part can be a tightening bolt or a screw rod. In this way, the driving assembly 2 has a certain adjustment space on the installation plate 13, and the positioning accuracy of the driving assembly 2 is enhanced. Figure 3

[0038] Further, in an embodiment, as shown in Figure 3 ​As shown, the rotary support shaft 31 comprises an inner ring 311 and an outer ring 312, the inner ring 311 is fixedly arranged at the upper cavity opening of the base 1, and the ring center of the inner ring 311 is opposite to the position of the upper cavity opening, the outer ring 312 is sleeved on the inner ring 311, and the two can rotate relative to each other, and the outer ring 312 is drivingly connected with the driving assembly 2. In the embodiment, the rotary support shaft 31 further comprises an inner ring 311 and an outer ring 312, by fixing the inner ring 311 at the upper cavity opening of the base 1, and the ring center of the inner ring 311 is opposite to the position of the upper cavity opening, so that the cooling air provided by the air source can smoothly pass through the first cavity 11 and the ring center, and the smoothness of the cooling air transmission path is ensured. By sleeving the outer ring 312 on the inner ring 311, the two can rotate relative to each other, and the outer ring 312 is drivingly connected with the driving assembly 2, so that the relative rotation between the outer ring 312 and the inner ring 311 can be realized by means of a bearing, and the transmission mode between the outer ring 312 and the driving assembly 2 can be gear transmission, chain transmission or belt transmission, so as to ensure accurate control of the rotation angle of the rotating assembly 3, and the positioning is more accurate.

[0039] Further, in an embodiment, the inner ring 311 and the outer ring 312 are connected by a roller bearing. In the embodiment, the inner ring 311 and the outer ring 312 are connected by a roller bearing, so that the relative rotation between the inner ring 311 and the outer ring 312 is more flexible. In addition, the roller bearing rolls between the inner ring 311 and the outer ring 312, which also reduces friction and resistance, thereby improving the fluency and efficiency of rotation.

[0040] Further, in an embodiment, as shown in Figure 1 or Figure 3 , the driving assembly 2 comprises a servo motor 21 and a speed reducer 22, which are connected by a worm gear, and the speed reducer 22 is connected with the outer ring 312 by gear engagement. In the embodiment, the driving assembly 2 comprises a servo motor 21 and a speed reducer 22, the servo motor 21 is known for its high precision and high performance, has the characteristics of accurate position control and fast response speed, when the servo motor 21 and the speed reducer 22 are connected by a worm gear, the high precision advantage can be further played, and the accuracy of transmission is ensured. And the speed reducer 22 is connected with the outer ring 312 by gear engagement, which can realize high-precision speed and torque transmission, reduce energy loss, and improve power transmission efficiency.

[0041] Further, in an embodiment, as shown in Figure 1 and Figure 2As shown, the intermediate turntable 32 comprises an upper turntable 322 and a lower turntable 323, the lower turntable 323 is fixedly arranged on the top surface of the outer ring 312 and is fixedly connected with the bottom end of the upper turntable 322, the lower turntable 323 is provided with a plurality of air passing holes 3231, and the second cavity 321 is arranged in the upper turntable 322 and is communicated with the first cavity 11 through the air passing holes 3231 and the annular core. In this embodiment, the intermediate turntable 32 comprises the upper turntable 322 and the lower turntable 323, the lower turntable 323 is fixedly arranged on the top surface of the outer ring 312 and is fixedly connected with the bottom end of the upper turntable 322, so that the lower turntable 323 and the upper turntable 322 form an integral whole, and the structure is more compact. The lower turntable 323 is provided with a plurality of air passing holes 3231, and the second cavity 321 is arranged in the upper turntable 322, so that the second cavity 321 is communicated with the first cavity 11 through the air passing holes 3231 and the annular core. In this way, the cooling air provided by the air source can pass through the first cavity 11, the annular core and the air passing holes 3231 into the second cavity 321, and is stored and filled in the second cavity 321, and is discharged when needed, so as to ensure the air volume and air pressure of the cooling air.

[0042] Further, in an embodiment, as shown in Figure 1 and Figure 2 , the side surface of the upper turntable 322 is provided with at least one window for replacing internal parts, and the window is detachably mounted with a sealing plate 3221. In this embodiment, the internal structure (such as sensors, actuators, etc.) in the upper turntable 322 can be conveniently installed in the interior of the upper turntable 322, and the entire turntable does not need to be disassembled. At the same time, when the internal structure of the upper turntable 322 fails, the sealing plate 3221 can be disassembled to quickly replace and repair these parts. In addition, the use of the sealing plate 3221 can effectively prevent the escape of wind energy and ensure the air volume and air pressure in the second cavity 321.

[0043] Further, in an embodiment, referring to Figure 4 , Figure 4 , it is Figure 1 a schematic view of the cooling air nozzle 4. As Figure 4As shown, the cooling nozzle 4 includes a housing 41, a cover plate 42 and a cylinder 43. The housing 41 is provided with a third cavity 44 extending through from top to bottom. The cover plate 42 is hingedly connected to one end of the housing 41 at the upper cavity opening. The lower cavity opening of the housing 41 is in communication with the second cavity 321. The cylinder 43 is arranged inside the third cavity 44, and the piston rod of the cylinder 43 is hingedly connected to the other end of the cover plate 42. In this embodiment, the cooling nozzle 4 is installed on the top surface of the upper turntable 322, and can continuously supply cooling air to the workpiece gripped by the upper turntable 322. The cooling nozzle 4 includes the housing 41, the cover plate 42 and the cylinder 43. The housing 41 is provided with the third cavity 44 extending through from top to bottom. The upper cavity opening of the third cavity 44 is used for air exhaust, and the lower cavity opening is used for communication with the second cavity 321, so as to ensure that the path of the cooling air is simple and normally supplied. One end of the cover plate 42 is hingedly connected to the upper cavity opening of the housing 41. When the cover plate 42 is opened, it is inclined to one side of the upper cavity opening. The cooling air in the second cavity 321 passes through the third cavity opening and is exhausted. After the cover plate 42 is closed, the cover plate 42 completely blocks the upper cavity opening, and the continuous exhaust of the cooling air is cut off. Therefore, the purpose of intermittent air supply is achieved. In addition, the cylinder 43 is arranged inside the third cavity 44, and the piston rod of the cylinder 43 is hingedly connected to the other end of the cover plate 42. By extending or retracting the piston rod, the opening and closing of the cover plate 42 can be easily realized.

[0044] Further, in an embodiment, as shown in the drawings, Figure 3 The cylinder 43 is installed on the two inner side walls of the housing 41. In this embodiment, by installing the cylinder 43 on the two inner side walls of the housing 41, the reaction force generated during the operation of the cylinder 43 can be effectively dispersed, and the structural stability of the entire cooling nozzle 4 is enhanced. At the same time, the internal space of the housing 41 is also well utilized, avoiding the waste of space resources.

[0045] In the description of the present application, it should be noted that the positions or positional relationships indicated by the terms "upper", "lower", etc. are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular position, be constructed and operated in a particular position, and therefore cannot be understood as a limitation on the present application. Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] It should be noted that, in the present application, the relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0047] The foregoing is merely illustrative of the principles of the application and various modifications can be made by those skilled in the art without departing from the spirit and scope of the application. The above embodiments are illustrative, and not restrictive, of the scope of the application.

Claims

1. A rotary intermittent air supply mechanism, characterized in that, include: The base (1) has a first cavity (11) that runs through the top and bottom, and the side of the base (1) has an installation port (12) that does not communicate with the first cavity (11). A drive component (2) is installed at the mounting port (12); The rotating assembly (3) includes a rotary support shaft (31) and an intermediate turntable (32). The rotary support shaft (31) is rotatably disposed at the upper cavity of the base (1), and its rotatable part is fixedly connected to the intermediate turntable (32) and is connected to the drive assembly (2). The intermediate turntable (32) is provided with a second cavity (321), and the second cavity (321) communicates with the first cavity (11). Several adjustable cooling nozzles (4) are disposed on the top surface of the intermediate turntable (32), and the interior of each cooling nozzle (4) is connected to the second cavity (321).

2. The rotary intermittent air supply mechanism as described in claim 1, characterized in that, The top surface of the base (1) extends towards the mounting port (12) to form a mounting plate (13), and the drive assembly (2) is fixedly mounted at the mounting port (12) via the mounting plate (13).

3. The rotary intermittent air supply mechanism as described in claim 2, characterized in that, The mounting plate (13) has a plurality of oblong holes (131), and the drive assembly (2) is mounted on the mounting plate (13) through the oblong holes (131) by means of a mounting piece.

4. The rotary intermittent air supply mechanism as described in claim 1, characterized in that, The rotary support shaft (31) includes an inner ring (311) and an outer ring (312). The inner ring (311) is fixed at the upper cavity of the base (1), and the center of the inner ring (311) is opposite to the position of the upper cavity. The outer ring (312) is sleeved on the inner ring (311), and the two can rotate relative to each other. The outer ring (312) is connected to the drive assembly (2) for transmission.

5. The rotary intermittent air supply mechanism as described in claim 4, characterized in that, The inner ring (311) and the outer ring (312) are connected by a roller bearing.

6. The rotary intermittent air supply mechanism as described in claim 4, characterized in that, The drive assembly (2) includes a servo motor (21) and a reducer (22), which are connected by a worm gear, and the reducer (22) is connected to the outer ring (312) by gear meshing.

7. The rotary intermittent air supply mechanism as described in claim 4, characterized in that, The intermediate turntable (32) includes an upper turntable (322) and a lower turntable (323). The lower turntable (323) is fixed on the top surface of the outer ring (312) and is fixedly connected to the bottom end of the upper turntable (322). The lower turntable (323) has a plurality of air passage holes (3231). The upper turntable (322) has a second cavity (321) inside. The second cavity (321) is connected to the first cavity (11) through the air passage holes (3231) and the ring center.

8. The rotary intermittent air supply mechanism as described in claim 7, characterized in that, The upper turntable (322) has at least one window on its side for replacing internal parts, and a cover plate (3221) is detachably installed at the window.

9. The rotary intermittent air supply mechanism as described in claim 5, characterized in that, The cooling nozzle (4) includes a housing (41), a cover plate (42), and a cylinder (43). The housing (41) has a third cavity (44) that extends vertically. One end of the cover plate (42) is hinged to the upper cavity of the housing (41). The lower cavity of the housing (41) is connected to the second cavity (321). The cylinder (43) is located inside the third cavity (44), and the piston rod of the cylinder (43) is hinged to the other end of the cover plate (42).

10. The rotary intermittent air supply mechanism as described in claim 9, characterized in that, The cylinder (43) is mounted on the two inner sidewalls of the housing (41).

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