A flash-evaporated medical protective sheet and annular air-blowing cooling device

Abstract

The present invention provides a flash medical protective sheet and an annular blowing cooling device, which solves the problems of fiber bundle adhesion interference, etc., and comprises a cooling cylinder arranged at the lower end of a spinneret, the cooling cylinder is connected with an air inlet pipe, the center of the cooling cylinder is a cooling cavity extending along the axial direction, an air inlet chamber surrounding the circumference of the cooling cavity is arranged in the cooling cylinder, the air inlet pipe is connected with the air inlet chamber and a rectifying mechanism is arranged between them, a blowing cooling mechanism is arranged in the middle of the cooling cylinder in the vertical direction, the blowing cooling mechanism is located between the air inlet chamber and the cooling cavity, exhaust mechanisms are arranged above and below the blowing cooling mechanism, and an adaptive balancing mechanism is arranged between the exhaust mechanism and the air inlet chamber. The present invention has the advantages of good cooling effect and high molding quality.

Description

Technical Field

[0001] The invention belongs to the technical field of flash-evaporated sheet material processing, and in particular relates to a ring-blowing cooling device for flash-evaporated medical protective sheets. Background Art

[0002] Ring blowing is one of the cooling blowing methods during fiber forming in melt spinning, and is used for cooling and forming of flash sheets. The cooling air blows from the circumferential direction to the melt stream ejected from the spinneret hole, so that the stream is evenly cooled and solidified into fibers. It is suitable for spinning cooling when there are many holes in the spinneret. Usually, the air flow blows from the outside to the center, and the blowing ring is installed under the spinneret, with the top end about 150mm away from the plate surface. The blowing ring is a concentric annular jacket with a porous annular plate on the inner wall, and the air flow is sent out through small holes. When the number of spinneret holes is small, the "side blowing" method can be used for cooling, and when the number of spinneret holes is particularly large, the "central radiation cooling" method can be used, that is, the cooling air is blown radially from the center of the filament bundle to the filament bundle to cool it. However, in actual use, the existing ring blowing mechanism uses a single cooling port inside, which has a poor melt cooling effect and there is a problem of adhesion during cooling.

[0003] In order to solve the deficiencies of the existing technology, people have conducted long-term exploration and proposed various solutions. For example, a Chinese patent document discloses a non-woven fabric ring blowing device [202211039065.8], which includes: an air inlet duct, a tube and a ring blowing head; the top of the air inlet duct is connected to the ring blowing head through a bend pipe, and the ring blowing head is connected to the top of the tube. The ring blowing head is outside the tube, and an inner layer of wind straightening device and an outer layer of cylindrical jacket are respectively provided from the inside to the outside; the inner layer of wind straightening device and the outer layer of cylindrical jacket form the main structure of the ring blowing head.

[0004] The above solution solves the problem of uneven air intake in the ring-blowing cooling mechanism to a certain extent, but the solution still has many shortcomings, such as adhesion interference of fiber bundles and other problems. Summary of the invention

[0005] The object of the present invention is to provide a ring-blowing cooling device for flash-evaporated medical protective sheets with reasonable design and good fiber forming effect in view of the above problems.

[0006] Another object of the present invention is to provide a flash-steamed medical protective sheet with high processing quality in order to solve the above-mentioned problems.

[0007] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a ring-blowing cooling device for flash-evaporated medical protective sheet, comprising a cooling cylinder arranged at the lower end of a spinneret, the cooling cylinder being connected to an air inlet pipe, the center of the cooling cylinder being a cooling cavity extending along the axial direction, an air inlet chamber surrounding the cooling cavity circumferentially arranged in the cooling cylinder, the air inlet pipe being connected to the air inlet chamber and a rectifying mechanism being arranged therebetween, a blowing cooling mechanism being arranged in the middle part of the cooling cylinder in the vertical direction, the blowing cooling mechanism being located between the air inlet chamber and the cooling cavity, exhaust mechanisms being arranged above and below the blowing cooling mechanism respectively, and an adaptive balancing mechanism being arranged between the exhaust mechanism and the air inlet chamber.

[0008] In the above-mentioned annular air blowing cooling device for flash-evaporated medical protective sheet, the air blowing cooling mechanism includes a blow tube arranged between the air inlet chamber and the cooling cavity, the blow tube is provided with a flow guide component along the vertical direction, the flow guide component is arranged symmetrically with respect to the blow tube and extends toward the center of the cooling cavity, and a flow guide port is provided on the outside of the blow tube, which surrounds the blow tube in the circumferential direction and is connected to the flow guide component.

[0009] In the above-mentioned annular blowing cooling device for a flash-evaporated medical protective sheet, the guide assembly includes guide rings arranged in the vertical direction of the blowing tube, guide cavities are respectively arranged in the guide rings, and the guide rings include an integrally formed first guide surface, a second guide surface and a third guide surface, the first guide surface is opposite to the cooling cavity, the lower end of the second guide surface is connected to the lower end of the first guide surface and the second guide surface is opposite to the air inlet chamber, the third guide surface is located above the first guide surface and a blowing port is left between the two surfaces to connect the guide cavity with the cooling cavity; the third guide surfaces of adjacent guide rings are connected to the second guide surfaces, and an air inlet is left between the third guide surface and the second guide surface to connect the guide port with the guide cavity; a guide gap connected to the blowing port is left between the upper and lower adjacent guide rings, and the guide gap extends downwardly obliquely relative to the cooling cavity.

[0010] In the above-mentioned annular air cooling device for flash-evaporated medical protective sheets, the rectifying mechanism includes a rectifying plate arranged in the air inlet pipe, a rectifying cylinder is installed in the air inlet chamber, and rectifying holes are respectively opened on the rectifying plate and the rectifying cylinder.

[0011] In the above-mentioned annular air blowing cooling device for flash-evaporated medical protective sheet materials, the exhaust mechanism includes exhaust channels arranged above and below the air inlet chamber, and the exhaust channels are arranged symmetrically with respect to the cooling cylinder; the exhaust channel includes an L-shaped main channel and a secondary channel extending radially along the cooling cylinder and connected to the main channel, and the air blowing cooling mechanism is provided with suction ports respectively at the upper and lower parts thereof, which connect the main channel with the cooling chamber in a one-to-one manner, and an exhaust pipe connected to the secondary channel is connected to the outer side of the cooling cylinder.

[0012] In the above-mentioned annular air blowing cooling device for flash-evaporated medical protective sheet, the adaptive balancing mechanism includes damping impellers rotatably installed in the auxiliary channels, the damping impellers are connected to the damping shaft extending into the air intake chamber, bearing rings are rotatably installed between the upper and lower ends of the rectifier cylinder and the air intake chamber, the upper and lower ends of the rectifier cylinder are respectively meshed with the damping shaft through gear rings, and a turbine assembly opposite to the air intake pipe and the air blowing cooling mechanism is installed in the middle of the rectifier cylinder in the vertical direction.

[0013] In the above-mentioned annular air cooling device for flash-evaporated medical protective sheets, the turbine assembly includes a turbine cylinder fixed on a rectifier cylinder, turbine blades are distributed on the outside of the turbine cylinder, and the turbine blades are symmetrically arranged up and down relative to the turbine cylinder; driving blades are arranged on the inside of the turbine cylinder in a centrally symmetrical manner, and the driving blades are arranged inclined relative to the radial direction of the turbine cylinder.

[0014] In the above-mentioned annular air cooling device for flash-evaporated medical protective sheets, the cooling cylinder includes a main cylinder body, the main cylinder body has sub-shells symmetrically assembled up and down, the sub-shells are respectively connected to semi-cylindrical extension shells, the extension shells are symmetrically assembled into air inlet pipes, and the air inlet chamber is arranged between the sub-shells; the upper and lower ends of the main cylinder body are respectively equipped with main cover bodies, and the exhaust mechanism is arranged between the main cover body and the main cylinder body; a feed port and a discharge port opposite to the cooling cavity are arranged in the center of the main cover body, the feed port and the discharge port have convex edges extending toward the central axis of the main cover body, and the cooling cavity is located between the convex edges of the main cover body.

[0015] In the above-mentioned annular air cooling device for flash-evaporated medical protective sheets, a downwardly extending extension cylinder is connected to the discharge port at the lower end of the cooling cylinder, and a plurality of equidistantly arranged sealing ribs are arranged on the outside of the air inlet pipe port, and sealing sheets are clamped and fixed between adjacent sealing ribs.

[0016] A flash-steamed medical protective sheet adopts the above-mentioned ring-blowing cooling device for flash-steamed medical protective sheet to carry out air blowing cooling.

[0017] Compared with the existing technology, the advantages of the present invention are: the cooling cylinder has a built-in adaptive balancing mechanism to automatically adjust the air intake volume, and the rectifying mechanism and the exhaust mechanism guide the cooling air to flow evenly, thereby ensuring the fiber cooling and molding effect; the blowing cooling mechanism adopts upper and lower multi-layer guide components to ensure cooling uniformity while limiting the blowing direction to prevent mutual interference between fibers; the cooling cylinder adopts a splicing combination structure, and the cooling cylinder can be quickly disassembled and assembled, so that the internal components can be maintained and adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 It is a structural schematic diagram of another perspective of the present invention;

[0020] Figure 3 It is a structural cross-sectional view of the present invention;

[0021] Figure 4 is a partial cross-sectional view of the present invention;

[0022] Figure 5 is another partial cross-sectional view of the present invention;

[0023] Figure 6 is another partial cross-sectional view of the present invention;

[0024] In the figure, a cooling cylinder 1, a main cylinder body 11, a secondary shell 12, an extension shell 13, a main cover body 14, a feed port 15, a discharge port 16, a sealing sheet 17, an extension cylinder 18, a sealing rib 19, an air inlet pipe 2, a cooling cavity 3, an air inlet chamber 4, a rectifying mechanism 5, a rectifying plate 51, a rectifying cylinder 52, a rectifying hole 53, an air blowing cooling mechanism 6, an air blowing cylinder 61, a guide port 62, a guide ring 63, a guide gap 631, a guide cavity 64, a first guide surface 65, a second guide surface 66, a third guide surface 67, an air blowing port 68, an air inlet 69, an exhaust mechanism 7, an exhaust channel 71, a main channel 72, a secondary channel 73, an air suction port 74, an exhaust pipe 75, an adaptive balancing mechanism 8, a damping impeller 81, a damping shaft 82, a bearing ring 83, a gear ring 84, a turbine cylinder 85, a turbine blade 86, and a drive blade 87. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figure 1-6 As shown, a ring-blowing cooling device for flash medical protective sheet includes a cooling cylinder 1 arranged at the lower end of a spinneret, from which melt is sprayed and introduced into the cooling cylinder 1, and the cooling cylinder 1 is connected to an air inlet pipe 2 of an external cooling pump. The center of the cooling cylinder 1 is a cooling cavity 3 extending in the axial direction, and the melt enters the cooling cavity 3 and exchanges heat with the cooling airflow input by the air inlet pipe 2. An air inlet chamber 4 surrounding the cooling cavity 3 is arranged in the cooling cylinder 1 to guide the gas to flow in an annular shape, and the air inlet pipe 2 is connected to the air inlet chamber 4 and a rectifying mechanism 5 is arranged between them to prevent gas input turbulence, and a blowing cooling mechanism 6 directly opposite to the cooling cavity 3 is arranged in the middle of the cooling cylinder 1 in the vertical direction, and the blowing cooling mechanism 6 is located between the air inlet chamber 4 and the cooling cavity 3 to guide the annular flow of air to be uniformly input into the cooling cavity 3. Different from the conventional bottom exhaust structure, the blowing cooling mechanism 6 in the present application is respectively provided with an exhaust mechanism 7 above and below, and the independent exhaust mechanism 7 reduces the impact on the surface of the sheet material and ensures the quality of flash spinning. An adaptive balancing mechanism 8 is provided between the exhaust mechanism 7 and the air inlet chamber 4 to limit the air intake volume and air intake speed. It is based on a negative feedback regulation mechanism and does not require an additional sensing structure.

[0027] Specifically, the air blowing cooling mechanism 6 adopts an upper and lower multi-layer air blowing cooling structure, specifically including a blower 61 arranged between the air inlet chamber 4 and the cooling chamber 3, and the blower 61 is provided with a guide assembly in the vertical direction, and the guide assembly is arranged centrally symmetrically with respect to the blower 61 and extends toward the center of the cooling chamber 3, and multiple guide assemblies cooperate with each other to ensure the uniformity of air blowing during the falling process of the melt. The outer side of the blower 61 is provided with a guide port 62 that surrounds the blower 61 in the circumferential direction and is connected to the guide assembly to guide the air input and distribute it to each guide assembly.

[0028] Specifically, the guide assembly includes guide rings 63 arranged in the vertical direction of the hair dryer 61 , and guide cavities 64 are respectively provided in the guide rings 63 to guide the air to be distributed in a ring shape. In order to guide the air to flow obliquely downward and limit the melt in the axial position of the blowing tube 61, the guide ring 63 includes an integrally formed first guide surface 65, a second guide surface 66 and a third guide surface 67, the first guide surface 65 is opposite to the cooling chamber 3, the lower end of the second guide surface 66 is connected to the lower end of the first guide surface 65 and the second guide surface 66 is opposite to the air inlet chamber 4, the third guide surface 67 is located above the first guide surface 65 and a blowing port 68 is left between the first guide surface 65 to connect the guide chamber 64 with the cooling chamber 3; the third guide surface 67 of the adjacent guide ring 63 is connected to the second guide surface 66, and an air inlet 69 is left between the third guide surface 67 and the second guide surface 66 to connect the guide port 62 with the guide chamber 64; a guide gap 631 connected to the blowing port 68 is left between the upper and lower adjacent guide rings 63, and the guide gap 631 extends obliquely downward relative to the cooling chamber 3.

[0029] The air enters from the guide port 62, is input into the guide cavity 64 through each air inlet 69, and then is input into the cooling cavity 3 from the guide gap 631 under pressure. Due to the arc surface structure of the first guide surface 65 and the second guide surface 66, the blowing port 68 between them guides the air to be obliquely guided downward and flows through the surface of the first guide surface 65. In addition to satisfying the circumferential uniform blowing, the guide assembly as a whole also realizes the axial uniform air intake, and guides the melt to fall during the blowing process to prevent it from sticking to the inside of the blowing cooling mechanism 6.

[0030] Further, similar to a conventional rectifying structure, the rectifying mechanism 5 in the present application includes a rectifying plate 51 disposed in the air intake pipe 2, a rectifying cylinder 52 is installed in the air intake chamber 4, and rectifying holes 53 are respectively opened on the rectifying plate 51 and the rectifying cylinder 52. The rectifying plate 51 and the rectifying cylinder 52 perform primary and secondary rectification on the air input from the air intake pipe 2 to ensure stable air flow.

[0031] Furthermore, the exhaust mechanism 7 adopts a double exhaust structure, specifically including exhaust channels 71 arranged above and below the air inlet chamber 4, and the exhaust channels 71 are arranged symmetrically with respect to the cooling cylinder 1; the exhaust channel 71 includes an L-shaped main channel 72 and a secondary channel 73 extending radially along the cooling cylinder 1 and connected to the main channel 72, and the upper and lower parts of the blowing cooling mechanism 6 are respectively provided with air suction ports 74 that connect the main channel 72 with the cooling chamber 3 in a one-to-one correspondence, and the outside of the cooling cylinder 1 is connected to an exhaust pipe 75 that is connected to the secondary channel 73. When air enters the cooling chamber 3, the exhaust pipe 75 will lead out the air after the heat exchange is completed, so as to avoid the air being directly led out from the bottom cooling cylinder 1 and affecting the external ambient temperature. The hidden air suction port 74 is adjacent to the guide assembly, so as to simulate the convective heat exchange and obtain the best cooling effect.

[0032] In addition, since the air intake volume of the intake pipe 2 is volatile, the adaptive balancing mechanism 8 includes a damping impeller 81 rotatably mounted in the secondary channel 73, the damping impeller 81 is connected to a damping shaft 82 extending into the intake chamber 4, a bearing ring 83 is rotatably mounted between the upper and lower ends of the rectifier cylinder 52 and the intake chamber 4, the upper and lower ends of the rectifier cylinder 52 are respectively meshed with the damping shaft 82 through a gear ring 84 for transmission, and a turbine assembly opposite to the intake pipe 2 and the air blowing cooling mechanism 6 is installed in the middle of the rectifier cylinder 52 in the vertical direction. The damping impeller 81 rotates when exhausting and drives the damping shaft 82 and the gear ring 84 to rotate. Since the damping shaft 82 is selected, the faster the speed of the damping impeller 81, the greater the damping torque applied to the damping impeller 81, thereby achieving deceleration of the turbine assembly, thereby reducing the intake volume and intake flow rate.

[0033] At the same time, the turbine assembly includes a turbine barrel 85 fixed on the fairing barrel 52, and turbine blades 86 are distributed on the outside of the turbine barrel 85. The turbine blades 86 are arranged symmetrically with respect to the turbine barrel 85 to realize bidirectional drive; the driving blades 87 are arranged in a centrally symmetrical manner on the inside of the turbine barrel 85, and the driving blades 87 are arranged obliquely with respect to the radial direction of the turbine barrel 85. The air entering the intake pipe 2 drives the turbine blades 86 and its turbine barrel 85 to rotate, and the driving blades 87 on the inside also drive the air to be spirally introduced into the driving blades 87 as the rotation progresses. The adaptive balancing mechanism 8 uses a negative feedback adjustment mechanism to limit the driving speed of the turbine assembly, thereby maintaining the blowing volume and blowing speed of the blowing cooling mechanism 6 within a specified range, thereby improving the overall robustness of the annular blowing cooling device.

[0034] It can be seen that the cooling cylinder 1 includes a main cylinder 11, which has a sub-shell 12 symmetrically assembled from top to bottom. The sub-shells 12 are respectively connected to a semi-cylindrical extension shell 13, which is symmetrically assembled into an air intake pipe 2. The air intake chamber 4 is arranged between the sub-shells 12. The sub-shells 12 are separated from each other so that the internal air blowing cooling mechanism 6 and the turbine assembly can be maintained and adjusted; the upper and lower ends of the main cylinder 11 are respectively equipped with a main cover 14, and the exhaust mechanism 7 is arranged between the main cover 14 and the main cylinder 11; the center of the main cover 14 is provided with a feed port 15 and a discharge port 16 opposite to the cooling chamber 3, and the feed port 15 and the discharge port 16 have convex edges extending toward the central axis of the main cover 14, and the cooling chamber 3 is located between the convex edges of the main cover 14. After opening the main cover 14, the damping impeller 81 and other components in the adaptive balancing mechanism 8 can be adjusted and maintained, and the interval adjustment of the air volume and air speed of the air blowing cooling mechanism 6 can be achieved by replacing the damping shaft 82.

[0035] Obviously, the outlet 16 at the lower end of the cooling cylinder 1 is connected to an extension cylinder 18 extending downward, and the length of the extension cylinder 18 is adjusted as needed to limit the fiber distribution position. A number of equally spaced sealing ribs 19 are arranged on the outside of the port of the air inlet pipe 2, and a sealing sheet 17 is fixed between adjacent sealing ribs 19. The air inlet pipe 2 is plugged and sealed. The sealing sheet 17 and the external pipeline are interference-fitted to ensure sealing, and it is usually made of silicone material to prevent it from falling off.

[0036] A flash-steamed medical protective sheet adopts the above-mentioned ring-blowing cooling device for flash-steamed medical protective sheet to carry out air blowing cooling.

[0037] To sum up, the principle of this embodiment is that the air enters the air intake pipe 2, is rectified by the rectifying mechanism 5 and evenly distributed and blown into the cooling chamber 3 by the blowing cooling mechanism 6, the exhaust mechanism 7 discharges the air after the heat exchange is completed, and the adaptive balancing mechanism 8 between the exhaust mechanism 7 and the air intake chamber 4 maintains the stability of the air intake volume and air intake rate.

[0038] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways without departing from the scope defined by the spirit of the present invention.

[0039] Although this article uses more cooling cylinder 1, main cylinder body 11, auxiliary shell 12, extension shell 13, main cover body 14, feed port 15, discharge port 16, sealing sheet 17, extension cylinder 18, sealing rib 19, air inlet pipe 2, cooling cavity 3, air inlet chamber 4, rectification mechanism 5, rectification plate 51, rectification cylinder 52, rectification hole 53, air blowing cooling mechanism 6, blowing cylinder 61, guide port 62, guide ring 63, guide gap 631, guide cavity 64 , first guide surface 65, second guide surface 66, third guide surface 67, air outlet 68, air inlet 69, exhaust mechanism 7, exhaust channel 71, main channel 72, auxiliary channel 73, air inlet 74, exhaust pipe 75, adaptive balancing mechanism 8, damping impeller 81, damping shaft 82, bearing ring 83, gear ring 84, turbine barrel 85, turbine blade 86, driving blade 87 and other terms, but the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A ring-blowing cooling device for flash-evaporated medical protective sheets, comprising a cooling cylinder (1) arranged at the lower end of a spinneret, the cooling cylinder (1) being connected to an air inlet pipe (2), the center of the cooling cylinder (1) being a cooling cavity (3) extending in an axial direction, the cooling cylinder (1) being provided with an air inlet chamber (4) surrounding the cooling cavity (3) in a circumferential direction, characterized in that: The air intake pipe (2) is connected to the air intake chamber (4) and a rectifying mechanism (5) is arranged between them; a blowing cooling mechanism (6) is arranged in the middle of the cooling cylinder (1) in the vertical direction; the blowing cooling mechanism (6) is located between the air intake chamber (4) and the cooling cavity (3); exhaust mechanisms (7) are arranged above and below the blowing cooling mechanism (6); an adaptive balancing mechanism (8) is arranged between the exhaust mechanism (7) and the air intake chamber (4); the rectifying mechanism (5) comprises a rectifying plate (51) arranged in the air intake pipe (2); a rectifying cylinder (52) is installed in the air intake chamber (4); rectifying holes (53) are respectively provided on the rectifying plate (51) and the rectifying cylinder (52); the exhaust mechanism (7) comprises exhaust passages (71) arranged above and below the air intake chamber (4); the exhaust passages (71) are arranged in a centrally symmetrical manner with respect to the cooling cylinder (1); the blowing cooling mechanism (6) has exhaust holes (53) arranged above and below the exhaust passages (71); The cooling tube (1) is provided with an exhaust pipe (75) connected to the auxiliary channel (73) and an air inlet (74) which connects the main channel (72) and the cooling chamber (3) in a one-to-one correspondence; the exhaust channel (71) includes an L-shaped main channel (72) and an auxiliary channel (73) which extends radially along the cooling tube (1) and is connected to the main channel (72); the adaptive balancing mechanism (8) includes damping impellers (81) which are rotatably mounted in the auxiliary channel (73); the damping impellers (81) are connected to a damping shaft (82) which extends into the air intake chamber (4); bearing rings (83) are rotatably mounted between the upper and lower ends of the rectifier tube (52) and the air intake chamber (4); the upper and lower ends of the rectifier tube (52) are respectively meshed with the damping shaft (82) through a gear ring (84) for transmission; and a turbine assembly which is opposite to the air intake pipe (2) and the air blowing cooling mechanism (6) is mounted in the middle of the rectifier tube (52) in the vertical direction.

2. The ring-blowing cooling device for flash-evaporated medical protective sheet according to claim 1, characterized in that: The blowing cooling mechanism (6) comprises a blowing tube (61) arranged between the air inlet chamber (4) and the cooling cavity (3); the blowing tube (61) is provided with a flow guide component arranged in a vertical direction; the flow guide component is arranged centrally symmetrically with respect to the blowing tube (61) and extends toward the center of the cooling cavity (3); and a flow guide port (62) is arranged on the outside of the blowing tube (61) and surrounds the outside of the blowing tube (61) in a circumferential direction and is connected to the flow guide component.

3. The ring-blowing cooling device for flash-evaporated medical protective sheet according to claim 2, characterized in that: The guide assembly comprises a guide ring (63) arranged in a vertical direction along the hair dryer (61), and guide cavities (64) are respectively arranged in the guide ring (63). The guide ring (63) comprises a first guide surface (65), a second guide surface (66) and a third guide surface (67) which are integrally formed. The first guide surface (65) is opposite to the cooling cavity (3), the lower end of the second guide surface (66) is connected to the lower end of the first guide surface (65) and the second guide surface (66) is opposite to the air inlet chamber (4), and the third guide surface (67) is located at An air blowing port (68) is provided above and between the first guide surface (65) to connect the guide cavity (64) with the cooling cavity (3); the third guide surface (67) of the adjacent guide ring (63) is connected to the second guide surface (66), and an air inlet (69) is provided between the third guide surface (67) and the second guide surface (66) to connect the guide port (62) with the guide cavity (64); a guide gap (631) is provided between the upper and lower adjacent guide rings (63) to connect with the air blowing port (68), and the guide gap (631) extends downwardly at an angle relative to the cooling cavity (3).

4. The ring-blowing cooling device for flash-evaporated medical protective sheet according to claim 1, characterized in that: The turbine assembly comprises a turbine cylinder (85) fixed on a fairing cylinder (52); turbine blades (86) are distributed on the outer side of the turbine cylinder (85); the turbine blades (86) are arranged symmetrically in the upper and lower directions relative to the turbine cylinder (85); and driving blades (87) are arranged in a centrally symmetrical manner on the inner side of the turbine cylinder (85); the driving blades (87) are arranged obliquely in the radial direction relative to the turbine cylinder (85).

5. The ring-blowing cooling device for flash-evaporated medical protective sheet according to claim 1, characterized in that: The cooling cylinder (1) comprises a main cylinder body (11), the main cylinder body (11) having a sub-shell (12) symmetrically assembled in upper and lower parts, the sub-shells (12) being respectively connected to semi-cylindrical extension shells (13), the extension shells (13) being symmetrically assembled into an air intake pipe (2), and the air intake chamber (4) being arranged between the sub-shells (12).

6. The ring-blowing cooling device for flash-evaporated medical protective sheet according to claim 5, characterized in that: The upper and lower ends of the main cylinder (11) are respectively equipped with a main cover (14), and the exhaust mechanism (7) is arranged between the main cover (14) and the main cylinder (11).

7. The ring-blowing cooling device for flash-evaporated medical protective sheet according to claim 6, characterized in that: The main cover body (14) is provided with a feed port (15) and a discharge port (16) at the center thereof, which are opposite to the cooling cavity (3); the feed port (15) and the discharge port (16) have convex edges extending toward the central axis of the main cover body (14); and the cooling cavity (3) is located between the convex edges of the main cover body (14).

8. The ring-blowing cooling device for flash-evaporated medical protective sheet according to claim 7, characterized in that: The discharge port (16) at the lower end of the cooling cylinder (1) is connected to an extension cylinder (18) extending downward, and a plurality of equidistantly arranged sealing ribs (19) are provided on the outer side of the port of the air inlet pipe (2), and sealing sheets (17) are clamped and fixed between adjacent sealing ribs (19).

9. A flash-steamed medical protective sheet, characterized in that: The annular air blowing cooling device for flash-evaporated medical protective sheets as described in any one of claims 1 to 8 is used for air blowing cooling.

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